CN113250655B

CN113250655B - Oil field well head ration charge device with backward flow self preservation protects

Info

Publication number: CN113250655B
Application number: CN202110760760.2A
Authority: CN
Inventors: 于涛; 刘子龙; 韩雷; 刘新伟; 刘建军; 高京伟; 庄浩; 张伟伟; 王正杰; 宋晓鹏
Original assignee: Shengli Oilfield Dongqiang Mechanical And Electrical Equipment Manufacturing Co ltd
Current assignee: Shengli Oilfield Dongqiang Mechanical And Electrical Equipment Manufacturing Co ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2021-09-17
Anticipated expiration: 2041-07-06
Also published as: CN113250655A

Abstract

The invention discloses an oilfield wellhead quantitative dosing device with backflow self-protection, and relates to the technical field of oilfield wellhead dosing devices, and the oilfield wellhead quantitative dosing device comprises a first shell, a first liquid medicine storage, a first transparent measuring cylinder, a first sliding ring, a first electric push rod, a first displacement sensor, a first L-shaped connecting pipe, a second liquid medicine storage, a second transparent measuring cylinder, a second sliding ring, a second electric push rod, a second displacement sensor, a second electromagnetic valve, a second L-shaped connecting pipe, a third L-shaped connecting pipe, a pipeline joint and a detection spraying and melting mechanism; the invention reduces crude oil impurities by dissolving wax deposition on the inner wall of the oil pipe and mineral impurities contained in crude oil in the oil pipe, and collects, analyzes and arranges the collected data in the oil pipe by detecting a first pressure sensor and an infrared sensor in a spraying and melting mechanism and a first displacement sensor and a second displacement sensor respectively to analyze and obtain the quality of the crude oil.

Description

Oil field well head ration charge device with backward flow self preservation protects

Technical Field

The invention relates to the technical field of oilfield wellhead dosing devices, in particular to an oilfield wellhead quantitative dosing device with backflow self-protection function.

Background

After the water-containing crude oil is produced out of the ground, the water-containing crude oil needs to be conveyed to a downstream station through a pipeline, and then a demulsifier is added for oil-water separation, at present, oil extraction enterprises generally add the demulsifier, a corrosion inhibitor, a scale inhibitor and the like into an oil pipe of an oil extraction wellhead pipeline;

as shown in fig. 1, in which an oil pipe a is inserted into the oil field after the hole is turned, passes through the surface layer b and the rock layer d to reach an oil zone c, therefore, the crude oil in the oil zone layer is adopted, but before or during oil extraction, the acidification treatment is carried out in the oil pipe, the solution is utilized to dissolve the mineral impurities in the oil pipe, the quality of the crude oil is improved, but the mineral impurities are not only in the oil pipe, and the crude oil is composed of various substances, some substances can cause the wax precipitation phenomenon on the inner wall of the oil pipe to form a wax precipitation layer f, if the wax precipitation layer f is not treated, the wax precipitation layer f becomes thicker and thicker, the efficiency of the oil pipe for extracting crude oil is influenced, the common dosing device cannot simultaneously treat the wax precipitation layer f and mineral impurities, the common device capable of simultaneously processing the two conditions is often large and complex to operate, and the dosing device cannot simultaneously detect the quality condition of the crude oil;

in view of the above technical drawbacks, a solution is proposed.

Disclosure of Invention

The invention aims to: the invention combines the detection spray-melting mechanism with the first liquid medicine storage, the first transparent measuring barrel, the first slip ring, the first electric push rod, the second liquid medicine storage, the second transparent measuring barrel, the second slip ring and the second electric push rod which are matched with the detection spray-melting mechanism to wax the inner wall of the oil pipe, and mineral impurities contained in the crude oil in the oil pipe are dissolved to reduce the crude oil impurities, and the collected data in the oil pipe are respectively collected, analyzed, arranged and calculated by detecting a first pressure sensor and an infrared sensor in the spraying and melting mechanism and a first displacement sensor and a second displacement sensor so as to analyze the quality of the crude oil, the quality of the crude oil is detected more conveniently, and the quantitative dosing device with the backflow self-protection function for the oil field wellhead is provided for solving the problems that the inner wall of the oil pipe is waxed, the crude oil contains mineral impurities and the quality of the crude oil is judged.

In order to achieve the purpose, the invention adopts the following technical scheme:

a quantitative dosing device with backflow self-protection function for an oilfield wellhead comprises a first shell, a sealing door, a control panel, a display screen, an indicator lamp, an alarm, a first displacement sensor, a second displacement sensor, a third displacement sensor, a first pressure sensor, a second pressure sensor, an infrared sensor, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, an air pressure gauge, a first electric push rod and a second electric push rod, wherein a first liquid medicine storage device, a first transparent measuring tank, a second liquid medicine storage device and a second transparent measuring tank are fixedly arranged in the first shell, the first transparent measuring tank is in through connection with the first liquid medicine storage device through a pipeline, the second transparent measuring tank is in through connection with the second liquid medicine storage device through a pipeline, the first liquid medicine storage device and the second liquid medicine storage device are symmetrically arranged, the second transparent measuring tank and the first transparent measuring tank are symmetrically arranged on the opposite sides of the first liquid medicine storage device and the second liquid medicine storage device, the opposite sides of the first liquid medicine storage and the second liquid medicine storage are respectively connected with a first L-shaped connecting pipe and a second L-shaped connecting pipe in a penetrating manner, the first electromagnetic valve and the second electromagnetic valve are arranged at the outer end of the first shell, the first electromagnetic valve and the second electromagnetic valve are respectively connected with the top ends of the first liquid medicine storage and the second liquid medicine storage in a penetrating manner through pipelines, and the lower end of the first shell is fixedly provided with a pipeline joint;

a first slip ring is arranged in the first transparent measuring barrel in a sliding manner, the outer end of the first slip ring is abutted against the inner wall of the first transparent measuring barrel, the top end of a first electric push rod is fixedly arranged on the first shell, the bottom end of the first electric push rod penetrates through the outer wall of the first transparent measuring barrel in a sliding manner and extends into the first transparent measuring barrel to be fixedly connected with the top end of the first slip ring, a first displacement sensor is fixedly arranged at the joint of the first slip ring and the first electric push rod, a second slip ring is arranged in the second transparent measuring barrel in a sliding manner, the outer end of the second slip ring is abutted against the inner wall of the second transparent measuring barrel, the top end of the second electric push rod is fixedly arranged on the first shell, the bottom end of the second electric push rod penetrates through the outer wall of the second transparent measuring barrel in a sliding manner and extends into the second transparent measuring barrel to be fixedly connected with the top end of the second slip ring, and a second displacement sensor is fixedly arranged at the joint of the second slip ring and the second electric push rod, an electric coil roller is rotationally arranged in the pipeline joint, a cable is wound at the outer end of the electric coil roller, the head end of the cable is fixedly connected with the electric coil roller, the tail end of the cable is fixedly connected with a connecting support, and the top end of the connecting support is fixedly connected with a detection spraying and melting mechanism placed in an oil pipe through a bolt;

a data acquisition module, a data analysis module, a processor, an element execution module, a data processing module and a signal output module are arranged in the control panel;

the data acquisition module is used for collecting wax precipitation condition information of the inner wall of the oil pipe and mineral impurity area condition information of crude oil in the oil pipe in the process that the oil pipe is inserted into the oil production area, and respectively transmitting the wax precipitation condition information and the mineral impurity area condition information to the data analysis module and the data processing module, wherein the wax precipitation condition information is pressure data of the inner wall of the oil pipe acquired by the first pressure sensor, and the mineral impurity area condition information is area data of mineral impurities of the crude oil in the oil pipe scanned by the infrared sensor;

the data analysis module carries out real-time operation comparison analysis operation on the received wax precipitation condition information and mineral impurity area condition information,

further, the specific steps of the data analysis module for running the comparative analysis operation are as follows:

sa: acquiring pressure data at the inner wall of an oil pipe acquired by a first pressure sensor in real time, calibrating the pressure data as P, comparing the pressure data P with a preset pressure range pa, and generating a control signal pb when P is larger than or equal to pa;

the data analysis module transmits the control signal pb to the element execution module through the processor;

after receiving the control signal pb, the element execution module immediately controls the third displacement sensor to work and generate a displacement point mark Qa, and simultaneously immediately controls the electric coil roller to indirectly drive the double-ring-surface nozzle to move to the position of Qa, at the moment, the first electric push rod works to drive the first sliding ring to extrude into the first transparent measuring barrel, the first transparent measuring barrel is pressurized, so that the liquid medicine of the first liquid medicine storage device sequentially enters the double-ring-surface nozzle of the detection spraying and melting mechanism through the first L-shaped connecting pipe and the hose, then the liquid medicine is sprayed from the double-ring-surface nozzle to be sprayed to the wax deposition part on the inner wall of the oil pipe in an outward annular spraying mode, and the first displacement sensor moves along with the first sliding ring;

sb: acquiring area data of mineral impurities of crude oil in an oil pipe scanned by an infrared sensor in real time, calibrating the area data as H, comparing the area data with a preset area range ha, and generating a control signal hb when H is larger than or equal to ha;

the data analysis module transmits the generated control signal hb to the element execution module through the processor;

after receiving the control signal hb, the element execution module immediately controls the third displacement sensor to work and generate a displacement point mark Qb, and simultaneously immediately controls the electric coil drum to indirectly drive the double-ring-surface nozzle to move to the Qb position, at the moment, the second electric push rod works to drive the second sliding ring to extrude into the second transparent measuring barrel, the second transparent measuring barrel is pressurized, so that the liquid medicine of the second liquid medicine storage device sequentially enters the double-ring-surface nozzle of the detection spraying and melting mechanism through the second L-shaped connecting pipe and the hose, then the liquid medicine is sprayed to mineral impurities from the double-ring-surface nozzle in an inward annular spraying manner, and the second displacement sensor moves along with the second sliding ring;

the data acquisition module is also used for acquiring the displacement Fa generated by the first displacement sensor and the displacement Fb generated by the second displacement sensor and transmitting the displacement Fa and the displacement Fb to the data processing module;

after receiving H, P, Fa and Fb, the data processing module respectively marks the average values of the data in the descending process of the detection spraying and melting mechanism in the oil pipe as U, V, W and Z, and the average values are determined according to a formula

Is detectedThe oil quality condition D of the spraying and melting mechanism in the process of melting crude oil in the oil pipe,

、

、

and

are all the weight coefficients of the correction, and,

＞

＞

＞

and e₁+e₂+e₃+e₄= 5.72; when the oil quality condition D is smaller than the preset value D, a first text signal is generated and transmitted to the signal output module, and the signal output module edits a character mark of 'excellent crude oil quality' according to the text signal and transmits the character mark to a display screen for displaying; and when the oil quality condition D is larger than or equal to the preset value D, generating a second text signal and transmitting the second text signal to the signal output module, and editing the character mark of 'poor crude oil quality' according to the text signal by the signal output module and transmitting the character mark to a display screen for displaying.

Furthermore, the detection spraying and melting mechanism comprises a third shell, a first sliding cylinder sleeve and a second sliding cylinder sleeve, wherein a circulation oil duct is formed in the middle of the third shell, an annular installation cavity for installing accessories is formed in the inner wall of the third shell, the annular installation cavity is in a sealed state, the first sliding cylinder sleeve and the second sliding cylinder sleeve are fixedly arranged on the same side of the outer end of the third shell, the first sliding cylinder sleeve and the second sliding cylinder sleeve are respectively provided with a plurality of the first sliding cylinder sleeves, and one first sliding cylinder sleeve is correspondingly provided with one second sliding cylinder sleeve;

the first sliding cylinder sleeve and the second sliding cylinder sleeve are respectively connected with a first sliding rod and a second sliding rod in a sliding mode, one sides, far away from the third shell, of the first sliding rod and the second sliding rod are fixedly connected with arc-shaped connecting rods, the bottom ends, far away from the second sliding rod, of the arc-shaped connecting rods are fixedly connected with sliding balls abutted to the inner wall of the oil pipe, the second sliding rods penetrate through the outer wall of the second sliding cylinder sleeve in a sliding mode, extend into the second sliding cylinder sleeve in a sliding mode and are fixedly connected with sliding blocks, the outer ends of the sliding blocks are abutted to the inner wall of the second sliding cylinder sleeve, the elastic blocks are abutted to the inner wall of the second sliding cylinder sleeve in a sliding mode, the first pressure sensor is arranged on one side, far away from the sliding blocks, of the elastic blocks and abutted to the sliding blocks, and the first pressure sensor is fixedly arranged in an annular mounting cavity of the third shell;

third displacement sensor and infrared ray sensor are all fixed and are located the ring type installation intracavity of third casing, and infrared ray sensor locates one side that is close to the circulation oil duct of third casing, the fixed dicyclo face nozzle that is equipped with respectively to oil pipe inner wall spraying and to oil pipe axis spraying in third casing top, the medicine hole has been spouted to the dicyclo face nozzle, be equipped with the ring type baffle in the dicyclo face nozzle, ring type baffle and dicyclo face nozzle structure as an organic whole, the dicyclo face nozzle constitutes first annular medicine spraying cavity and second annular medicine spraying cavity with ring type baffle clearance fit, and first annular medicine spraying cavity is located the second annular medicine spraying cavity outside, and first annular medicine spraying cavity passes through hose and first L type connecting pipe through connection, and the second annular medicine spraying cavity passes through hose and second L type connecting pipe through connection.

Further, the top of third casing still fixedly is equipped with be used for with linking bridge fixed connection's first connecting block, first connecting block is equipped with a plurality ofly, and sets up threaded hole on the first connecting block, still movable mounting has the balancing weight in the ring type installation cavity of third casing.

Further, the bottom of the third casing that is close to circulation oil duct one side still fixedly is equipped with the slide, one side sliding connection that the slide is close to the circulation oil duct of third casing has the piece of floating, it is protruding that one side that the piece of floating is close to the slide is equipped with T type, the spout has been seted up to the slide, in the protruding embedding spout of T type and rather than sliding connection, it detects the spring to float the piece top through spot welding fixedly connected with, detect spring top and second pressure sensor fixed connection.

Further, the outer end of third casing still is equipped with prevents empting the structure, prevent empting the top that the structure located first slip cylinder, prevent empting the structure and include third slip cylinder liner and third slide bar, third slip cylinder liner is fixed to be located in the ring type installation cavity of third casing, the third slide bar slides and locates in the third slip cylinder liner, and third slide bar one end slides the inner wall that runs through the third slip cylinder liner and extends to its outside and fixedly connected with U type mounting bar, the gyro wheel of preventing empting is installed to the centre of U type mounting bar, the fixed cover in junction of U type mounting bar and third slide bar is equipped with the link stopper, the outer end of third slide bar still slides the cover and is equipped with prevents empting the spring, the both ends of preventing empting the spring are the butt of link stopper and third casing respectively.

Further, first liquid medicine accumulator is the same with second liquid medicine accumulator structure, first liquid medicine accumulator includes second casing and first bull stick, first bull stick rotates and locates in the second casing, the fixed cover in first bull stick outer end is equipped with the mixed turbofan of first mixed turbofan and second, the water conservancy diversion direction of the mixed turbofan of first mixed turbofan and second sets up relatively, the inner wall that first bull stick one end runs through the second casing extends to its outside and the first gear of fixedly connected with, first gear passes through the key sleeve and locates first bull stick outer end, first gear engagement is connected with drive assembly, drive assembly is connected with first liquid medicine accumulator and second liquid medicine accumulator meshing respectively simultaneously.

Further, drive assembly includes servo motor and second bull stick, servo motor is fixed to be located in the first casing, second bull stick and servo motor's output shaft fixed connection, the second bull stick rotates to be located in the first casing, and the fixed cover in outer end of second bull stick is equipped with the second gear, the symmetrical meshing of second gear is connected with the third gear, third gear fixedly connected with third bull stick, and third gear cover locate the third bull stick outer end, the third bull stick rotates to be located in the first casing, the third gear is connected with first liquid medicine accumulator and the meshing of second liquid medicine accumulator respectively.

Furthermore, a plurality of adjusting support frames are arranged at the bottom of the first shell, and adjusting components are mounted on the adjusting support frames;

the adjusting support frame comprises a first support cylinder sleeve, a second support cylinder sleeve and a fourth sliding rod, two ends of the fourth sliding rod are respectively arranged in the first support cylinder sleeve and the second support cylinder sleeve in a sliding mode, the outer end of the fourth sliding rod is sleeved with a support spring in a sliding mode, and two ends of the support spring are connected between the first support cylinder sleeve and the second support cylinder sleeve in a butt mode.

Furthermore, the adjusting assembly comprises a bidirectional screw rod, a second connecting block and a third connecting block, the outer end of the bidirectional screw rod is respectively sleeved on the second connecting block and the third connecting block in a symmetrical threaded manner, two ends of the bidirectional screw rod are respectively fixedly connected with an anti-falling block and a rotating handle, and the second connecting block and the third connecting block are respectively fixedly connected with the first supporting cylinder sleeve and the second supporting cylinder sleeve.

Further, still be equipped with the pressure release jar in the first casing, pressure release jar through connection has third L type connecting pipe, third L type connecting pipe one end runs through first shells inner wall and extends to in the pipe joint and rather than through connection, the atmospheric pressure strapping table passes through pipeline and pressure release jar through connection, and the atmospheric pressure strapping table locates the first casing outside.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

the invention reduces crude oil impurities by arranging a detection spraying and melting mechanism, and a first liquid medicine storage, a first transparent measuring tank, a first slip ring, a first electric push rod, a second liquid medicine storage, a second transparent measuring tank, a second slip ring and a second electric push rod which are matched with the detection spraying and melting mechanism, respectively collecting, analyzing and sorting the collected data in the oil pipe by detecting a first pressure sensor and an infrared sensor in the spraying and melting mechanism, and a first displacement sensor and a second displacement sensor so as to analyze the quality of the crude oil; and the synchronous treatment of the paraffin layer f and mineral impurities is realized through simple and convenient structural design and simplified step operation, and the quality condition of the crude oil can be detected on the basis of structural optimization.

Drawings

FIG. 1 shows a schematic diagram in the background art;

FIG. 2 shows a front view of a drug delivery device provided in accordance with the present invention;

FIG. 3 shows a schematic view of the internal structure of a drug delivery device provided according to the present invention;

FIG. 4 shows a schematic of a pressure relief tank provided in accordance with the present invention;

FIG. 5 is a schematic view showing an internal structure of a first medical fluid reservoir provided in accordance with the present invention;

FIG. 6 shows an enlarged view of a portion of FIG. 2 at A;

FIG. 7 is a schematic structural diagram of a detecting spray-melting mechanism provided according to the present invention;

FIG. 8 shows an enlarged view of a portion of FIG. 7 at B;

FIG. 9 shows an enlarged view of a portion of FIG. 7 at C;

FIG. 10 shows an enlarged view of a portion of FIG. 7 at D;

FIG. 11 shows a schematic structural view of a drive assembly provided in accordance with the present invention;

FIG. 12 illustrates a schematic view of an adjustment support bracket and adjustment assembly provided in accordance with the present invention;

FIG. 13 illustrates a flow diagram of a control panel provided in accordance with the present invention;

illustration of the drawings: 1. a first housing; 2. a sealing door; 3. a control panel; 4. a display screen; 5. an indicator light; 6. an alarm; 7. a first medical fluid reservoir; 8. a first transparent measuring cylinder; 9. a first slip ring; 10. a first electric push rod; 11. a first displacement sensor; 12. a first solenoid valve; 13. a first L-shaped connecting pipe; 14. a second medical fluid reservoir; 15. a second transparent measuring cylinder; 16. a second slip ring; 17. a second electric push rod; 18. a second displacement sensor; 19. a second solenoid valve; 20. a second L-shaped connecting pipe; 21. a pressure relief tank; 22. a third electromagnetic valve; 23. a barometric pressure gauge; 24. a third L-shaped connecting pipe; 25. a pipe joint; 26. an electric coil drum; 27. connecting a bracket; 28. detecting the spraying and melting mechanism; 29. adjusting the support frame; 30. an adjustment assembly; 31. a drive assembly; 701. a second housing; 702. a first rotating lever; 703. a first hybrid turbofan; 704. a second hybrid turbofan; 705. a first gear; 2801. a third housing; 2802. a first sliding cylinder liner; 2803. a first slide bar; 2804. a second sliding cylinder liner; 2805. a second slide bar; 2806. an arc-shaped connecting rod; 2807. a sliding ball; 2808. a slider; 2809. an elastic block; 2810. a first pressure sensor; 2811. a third displacement sensor; 2812. an infrared sensor; 2813. a slide plate; 2814. floating sheets; 2815. detecting a spring; 2816. a second pressure sensor; 2817. a double annular nozzle; 2818. a first connection block; 2819. a balancing weight; 2820. an anti-toppling structure; 2821. a third sliding cylinder liner; 2822. a third slide bar; 2823. an anti-toppling spring; 2824. a U-shaped mounting bar; 2825. a stop block; 2826. the anti-toppling roller; 2901. a first support cylinder liner; 2902. a fourth slide bar; 2903. a support spring; 2904. a second support cylinder liner; 3001. a bidirectional screw rod; 3002. a second connecting block; 3003. a third connecting block; 3004. an anti-drop block; 3005. turning a handle; 3101. a servo motor; 3102. a second rotating rod; 3103. a second gear; 3104. a third gear; 3105. and a third rotating rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2 to fig. 13, the present invention provides a technical solution: a quantitative dosing device with backflow self-protection function for an oilfield wellhead comprises a first shell 1, a sealing door 2, a control panel 3, a display screen 4, an indicator lamp 5, an alarm 6, a first displacement sensor 11, a second displacement sensor 18, a third displacement sensor 2811, a first pressure sensor 2810, a second pressure sensor 2816, an infrared sensor 2812, a first electromagnetic valve 12, a second electromagnetic valve 19, a third electromagnetic valve 22, an air pressure gauge 23, a first electric push rod 10 and a second electric push rod 17, wherein a first liquid medicine storage 7, a first transparent measuring tank 8, a second liquid medicine storage 14, a second transparent measuring tank 15 and a pressure relief tank 21 are fixedly arranged in the first shell 1, the first transparent measuring tank 8 is communicated with the first liquid medicine storage 7 through a pipeline, the first liquid medicine storage 7 is used for storing first reaction liquid for dissolving wax deposition on the inner wall of an oil pipe, the indicator light 5 is lighted to explain the starting of the machine;

the second transparent measuring barrel 15 is in through connection with the second liquid medicine storage 14 through a pipeline, the first liquid medicine storage 7 and the second liquid medicine storage 14 are symmetrically arranged, the second transparent measuring barrel 15 and the first transparent measuring barrel 8 are symmetrically arranged on opposite sides of the first liquid medicine storage 7 and the second liquid medicine storage 14, opposite sides of the first liquid medicine storage 7 and the second liquid medicine storage 14 are respectively in through connection with a first L-shaped connecting pipe 13 and a second L-shaped connecting pipe 20, the first electromagnetic valve 12 and the second electromagnetic valve 19 are arranged at the outer end of the first shell 1, the first electromagnetic valve 12 and the second electromagnetic valve 19 are respectively in through connection with the top ends of the first liquid medicine storage 7 and the second liquid medicine storage 14 through pipelines, a pipeline joint 25 is fixedly arranged at the lower end of the first shell 1, the pressure relief tank 21 is in through connection with a third L-shaped connecting pipe 24, one end of the third L-shaped connecting pipe 24 penetrates through the inner wall of the first shell 1 and extends into the pipeline joint 25 and is in through connection with the pipeline joint, the air pressure gauge 23 is in through connection with the pressure relief tank 21 through a pipeline, the air pressure gauge 23 is arranged on the outer side of the first shell 1, the second liquid medicine storage 14 is used for storing a second reaction liquid for dissolving mineral impurities of crude oil in an oil pipe, and the first electromagnetic valve 12 and the second electromagnetic valve 19 are both used for externally connecting additives or adding solution;

a first slip ring 9 is arranged in the first transparent measuring cylinder 8 in a sliding way, the outer end of the first slip ring 9 is abutted against the inner wall of the first transparent measuring cylinder 8, the top end of a first electric push rod 10 is fixedly arranged on the first shell 1, the bottom end of the first electric push rod 10 penetrates through the outer wall of the first transparent measuring barrel 8 in a sliding manner, extends into the first transparent measuring barrel and then is fixedly connected with the top end of the first slip ring 9, the first displacement sensor 11 is fixedly arranged at the joint of the first slip ring 9 and the first electric push rod 10, the second transparent measuring barrel 15 is internally provided with a second slip ring 16 in a sliding manner, the outer end of the second slip ring 16 is abutted against the inner wall of the second transparent measuring barrel 15, the top end of the second electric push rod 17 is fixedly arranged on the first shell 1, the bottom end of the second electric push rod 17 penetrates through the outer wall of the second transparent measuring barrel 15 in a sliding manner, extends into the second transparent measuring barrel and then is fixedly connected with the top end of the second slip ring 16, and the second displacement sensor 18 is fixedly arranged at the connection position of the second slip ring 16 and the second electric push rod 17;

the first electric push rod 10 operates to drive the first slip ring 9 to move downwards, the first liquid medicine storage 7 and the first transparent measuring barrel 8 form a communicating vessel, when the first slip ring 9 continuously extrudes downwards, when the first electromagnetic valve 12 is closed, the air pressure in the first liquid medicine storage 7 becomes high, so that the reaction liquid medicine in the first liquid medicine storage 7 is discharged into the first L-shaped connecting pipe 13, at the moment, the first slip ring 9 drives the first displacement sensor 11 to move, so that the real-time displacement is collected by the data collection module, the second electric push rod 17 operates to drive the second slip ring 16 to move downwards, the second liquid medicine storage 14 and the second transparent measuring barrel 15 form a communicating vessel, when the second slip ring 16 continuously extrudes downwards, when the second electromagnetic valve 19 is closed, the air pressure in the second liquid medicine storage 14 becomes high, so that the reaction liquid medicine in the second liquid medicine storage 14 is discharged into the second L-shaped connecting pipe 20, at the moment, the second slip ring 16 drives the second displacement sensor 18 to move, so that displacement is generated and is acquired by the data acquisition module;

an electric coil roller 26 is rotatably arranged in the pipeline joint 25, a cable is wound at the outer end of the electric coil roller 26, the head end of the cable is fixedly connected with the electric coil roller 26, the tail end of the cable is fixedly connected with a connecting support 27, the top end of the connecting support 27 is fixedly connected with a detection spraying and melting mechanism 28 placed in the oil pipe through a bolt, the detection spraying and melting mechanism 28 is used for detecting crude oil in the inner wall of the oil pipe and the oil pipe, when paraffin formation on the inner wall of the oil pipe and mineral impurities in the crude oil in the oil pipe are detected, the crude oil is respectively subjected to dissolution reaction by using a first reaction liquid and a second reaction liquid, and the conditions of the mineral impurities in the inner wall of the oil pipe and the crude oil are collected in real time through a data acquisition module, so that the crude oil is analyzed and sorted through a data processing module, and the quality of the crude oil is judged;

the detection spraying and melting mechanism 28 comprises a third housing 2801, a first sliding cylinder sleeve 2802, a second sliding cylinder sleeve 2804 and a sliding plate 2813, a circulation oil duct is formed in the middle of the third housing 2801, an annular installation cavity for installing accessories is formed in the inner wall of the third housing 2801, the annular installation cavity is in a sealing state, the first sliding cylinder sleeve 2802 and the second sliding cylinder sleeve 2804 are fixedly arranged on the same side of the outer end of the third housing 2801, the first sliding cylinder sleeve 2802 and the second sliding cylinder sleeve 2804 are respectively provided with a plurality of parts, and one first sliding cylinder sleeve 2802 is correspondingly provided with one second sliding cylinder sleeve 2804;

a first sliding cylinder sleeve 2802 and a second sliding cylinder sleeve 2804 are respectively connected with a first sliding rod 2803 and a second sliding rod 2805 in a sliding mode, one side, away from a third shell 2801, of the first sliding rod 2803 and the second sliding rod 2805 is fixedly connected with an arc-shaped connecting rod 2806, the bottom end, away from the second sliding rod 2805, of the arc-shaped connecting rod 2806 is fixedly connected with a sliding ball 2807 abutted against the inner wall of an oil pipe, the second sliding rod 2805 penetrates through the outer wall of the second sliding cylinder sleeve 2804 to extend into the second sliding cylinder sleeve 2804 in a sliding mode and is fixedly connected with a sliding block 2808, the outer end of the sliding block 2808 is abutted against the inner wall of the second sliding cylinder sleeve 2804, one side, away from the sliding block 2808, of the sliding block 2808 is abutted against an elastic block 2809, a first pressure sensor 2810 is arranged on one side, away from the sliding block 2808, and is abutted against the first pressure sensor 2810 is fixedly arranged in an annular installation cavity of the third shell 2801;

a third displacement sensor 2811 and an infrared sensor 2812 are both fixedly arranged in an annular mounting cavity of the third housing 2801, the infrared sensor 2812 is arranged on one side, close to a circulation oil duct, of the third housing 2801, a sliding plate 2813 is fixedly arranged at the bottom end, close to one side of the circulation oil duct, of the third housing 2801, one side, close to the circulation oil duct, of the sliding plate 2813 is connected with a floating plate 2814 in a sliding mode, a T-shaped bulge is arranged on one side, close to the sliding plate 2813, of the floating plate 2814, a sliding groove is formed in the sliding plate 2813, the T-shaped bulge is embedded into the sliding groove and connected with the sliding groove in a sliding mode, a detection spring 2815 is fixedly connected to the top end of the floating plate 2814 through spot welding, the top end of the detection spring 2815 is fixedly connected with a second pressure sensor 2816, a double annular nozzle 2817 for spraying the inner wall of an oil pipe and the central axis of the oil pipe is fixedly arranged at the top end of the third housing 2801, and a double annular nozzle 2817 is provided with a medicine spraying hole;

when the pressure of crude oil in the oil pipe is increased during reaction, the pressure of the crude oil in the oil pipe is detected by the second pressure sensor 2816 and transmitted to the data acquisition module, then after the pressure is compared with the preset pressure of the crude oil in the data acquisition module, no control signal is generated when the pressure is smaller than the preset pressure of the crude oil, a control signal is generated when the pressure is larger than or equal to the preset pressure of the crude oil, then the control signal is transmitted to the element execution module through the processor, the element execution module simultaneously opens the alarm 6 and the third electromagnetic valve 22, the third electromagnetic valve 22 performs pressure relief treatment on the interior of the oil pipe, the alarm 6 reminds a worker that the pressure in the oil pipe is too high, and the alarm 6 stops working when the pressure is relieved;

a ring-shaped partition plate is arranged in the double-ring-surface nozzle 2817, the ring-shaped partition plate and the double-ring-surface nozzle 2817 are of an integrated structure, the double-ring-surface nozzle 2817 and the ring-shaped partition plate are in clearance fit to form a first ring-shaped pesticide spraying cavity and a second ring-shaped pesticide spraying cavity, the first ring-shaped pesticide spraying cavity is positioned outside the second ring-shaped pesticide spraying cavity, the first ring-shaped pesticide spraying cavity is communicated with the first L-shaped connecting pipe 13 through a hose, and the second ring-shaped pesticide spraying cavity is communicated with the second L-shaped connecting pipe 20 through a hose;

a plurality of first connecting blocks 2818 are fixedly arranged at the top of the third shell 2801 and are fixedly connected with the connecting support 27, threaded holes are formed in the first connecting blocks 2818, and a balancing weight 2819 is movably arranged in the annular mounting cavity of the third shell 2801, so that the weight 2819 is used for increasing the weight of the detection spraying and melting mechanism 28 and is used for better descending due to higher density of crude oil;

the data acquisition module acquires wax precipitation condition information of the inner wall of the oil pipe and mineral impurity area condition information of crude oil in the oil pipe in the process that the oil pipe is inserted into an oil production area, and transmits the wax precipitation condition information and the mineral impurity area condition information to the data analysis module and the data processing module respectively, wherein the wax precipitation condition information is pressure data of the inner wall of the oil pipe acquired by the first pressure sensor 2810, and the mineral impurity area condition information is area data of mineral impurities of the crude oil in the oil pipe scanned by the infrared sensor 2812;

the data analysis module carries out real-time operation comparison analysis operation on the received wax precipitation condition information and mineral impurity area condition information, and the specific steps are as follows:

sa: acquiring pressure data collected by a first pressure sensor 2810 on the inner wall of an oil pipe in real time, calibrating the pressure data to be P, comparing the pressure data P with a preset pressure range pa, and generating a control signal pb when P is larger than or equal to pa;

after receiving the control signal pb, the element execution module immediately controls the third displacement sensor 2811 to work and generate a displacement point mark Qa, and also immediately controls the electric coil roller 26 to indirectly drive the double-ring-surface nozzle 2817 to move to the Qa position, at this time, the first electric push rod 10 works to drive the first slip ring 9 to extrude into the first transparent measuring barrel 8, the first transparent measuring barrel 8 is pressurized, so that the liquid medicine of the first liquid medicine storage 7 enters the double-ring-surface nozzle 2817 of the detection spraying and melting mechanism 28 through the first L-shaped connecting pipe 13 and the hose, then the liquid medicine is sprayed from the double-ring-surface nozzle 2817 to be sprayed to a wax deposition position on the inner wall of the oil pipe in an outward spraying manner, and the first displacement sensor 11 moves along with the first slip ring 9;

sb: acquiring area data of mineral impurities of crude oil in an oil pipe scanned by an infrared sensor 2812 in real time, calibrating the area data as H, comparing the area data with a preset area range ha, and generating a control signal hb when H is larger than or equal to ha;

after receiving the control signal hb, the element execution module immediately controls the third displacement sensor 2811 to work and generate a displacement point mark Qb, and also immediately controls the electric coil drum 26 to indirectly drive the double-ring-surface nozzle 2817 to move to the Qb position, at this time, the second electric push rod 17 works to drive the second slip ring 16 to extrude into the second transparent measuring barrel 15, the second transparent measuring barrel 15 is pressurized, so that the liquid medicine in the second liquid medicine storage 14 enters the double-ring-surface nozzle 2817 of the detection spraying and melting mechanism 28 through the second L-shaped connecting pipe 20 and the hose, then the liquid medicine is sprayed to mineral impurities from the double-ring-surface nozzle 2817 in an inward annular spraying manner, and the second displacement sensor 18 moves along with the second slip ring 16;

the data acquisition module also collects the displacement Fa generated by the first displacement sensor 11 and the displacement Fb generated by the second displacement sensor 18 and transmits the displacement Fa and the displacement Fb to the data processing module;

after receiving H, P, Fa and Fb, the data processing module respectively marks the average values of the data in the descending process of the detection spraying and melting mechanism 28 in the oil pipe as U, V, W and Z, and the average values are determined according to a formula

Obtaining the oil quality condition D of the detection spraying and melting mechanism 28 in the process of melting the crude oil in the oil pipe,

、

、

and

are all the weight coefficients of the correction, and,

＞

＞

＞

and e₁+e₂+e₃+e₄= 5.72; when the oil quality condition D is smaller than the preset value D, a first text signal is generated and transmitted to the signal output module, and the signal output module edits a character mark of 'excellent crude oil quality' according to the text signal and transmits the character mark to the display screen 4 for displaying; when the oil quality condition D is larger than or equal to the preset value D, a second text signal is generated and transmitted to the signal output module, and the signal output module edits a character mark of 'poor crude oil quality' according to the text signal and transmits the character mark to the display screen 4 for displaying;

the outer end of the third casing 2801 is also equipped with the anti-toppling structure 2820, the anti-toppling structure 2820 is located above the first sliding cylinder, the anti-toppling structure 2820 comprises a third sliding cylinder sleeve 2821 and a third sliding rod 2822, the third sliding cylinder sleeve 2821 is fixedly arranged in the annular mounting cavity of the third casing 2801, the third sliding rod 2822 is slidably arranged in the third sliding cylinder sleeve 2821, one end of the third sliding rod 2822 is slidably penetrated through the inner wall of the third sliding cylinder sleeve 2821 and extends to the outside of the third sliding cylinder sleeve 2821 and is fixedly connected with a U-shaped mounting bar 2824, the anti-toppling roller 2826 is arranged in the middle of the U-shaped mounting bar 2824, a stopper 2825 is fixedly arranged at the joint of the U-shaped mounting bar 2824 and the third sliding rod 2822, an anti-toppling spring 2823 is further slidably arranged at the outer end of the third sliding rod 2822, two ends of the anti-toppling spring 2823 are respectively abutted against the stopper 2825 and the outer end of the third casing 2801, the anti-toppling structure 2820 prevents the oil injection pipe mechanism 28 from toppling after the internal pressure changes, enhancing the stability and balance of the detection spray mechanism 28;

the first liquid medicine storage 7 and the second liquid medicine storage 14 have the same structure, the first liquid medicine storage 7 comprises a second shell 701 and a first rotating rod 702, the first rotating rod 702 is rotatably arranged in the second shell 701, the outer end of the first rotating rod 702 is fixedly sleeved with a first mixed turbofan 703 and a second mixed turbofan 704, the flow guide directions of the first mixed turbofan 703 and the second mixed turbofan 704 are oppositely arranged, one end of the first rotating rod 702 penetrates through the inner wall of the second shell 701 to extend to the outside of the second shell 701 and is fixedly connected with a first gear 705, the first gear 705 is sleeved at the outer end of the first rotating rod 702 through a key, the first gear 705 is engaged and connected with a driving assembly 31, the driving assembly 31 is engaged and connected with the first liquid medicine storage 7 and the second liquid medicine storage 14 respectively, the driving assembly 31 comprises a servo motor 3101 and a second rotating rod 3102, the servo motor 3101 is fixedly arranged in the first shell 1, the second rotating rod 3102 is fixedly connected with an output shaft of the servo motor 3101, the second rotating rod 3102 is rotatably arranged in the first shell 1, a second gear 3103 is fixedly sleeved at the outer end of the second rotating rod 3102, the second gear 3103 is symmetrically meshed with a third gear 3104, the third gear 3104 is fixedly connected with a third rotating rod 3105, the third gear 3104 is sleeved at the outer end of the third rotating rod 3105, the third rotating rod 3105 is rotatably arranged in the first shell 1, and the third gear 3104 is respectively meshed with the first liquid medicine storage 7 and the second liquid medicine storage 14;

liquid medicine raw materials respectively enter a first liquid medicine storage 7 and a second liquid medicine storage 14 through a first electromagnetic valve 12 and a second electromagnetic valve 19, then a servo motor 3101 electrically connected with the display screen 4 is opened to work, then an output shaft of the servo motor 3101 rotates to drive a second rotating rod 3102 fixed with the servo motor to rotate, and the second rotating rod 3102 rotates to drive a third rotating rod 3105, a third gear 3104, a second gear 3103 and a first gear 705 in sequence, so that the first mixing turbofan 703 and the second mixing turbofan 704 rotate, and liquid medicine is stirred to impact relatively, and stirring is more uniform;

the bottom of the first housing 1 is provided with a plurality of adjusting support frames 29, the adjusting support frames 29 are provided with adjusting components 30, the adjusting support frames 29 and the adjusting components 30 facilitate the installation of the device on an oil pipe, each adjusting support frame 29 comprises a first support cylinder sleeve 2901, a second support cylinder sleeve 2904 and a fourth slide bar 2902, two ends of the fourth slide bar 2902 are respectively arranged in the first support cylinder sleeve 2901 and the second support cylinder sleeve 2904 in a sliding manner, the outer end of the fourth slide bar 2902 is sleeved with a support spring 2903 in a sliding manner, two ends of the support spring 2903 are abutted between the first support cylinder sleeve 2901 and the second support cylinder sleeve 2904, each adjusting component 30 comprises a two-way screw 3001, the outer ends of the two-way screw rod 3001 are symmetrically and threadedly sleeved on the second connecting block 3002 and the third connecting block 3003 respectively, two ends of the two-way screw rod 3001 are fixedly connected with an anti-drop block 3004 and a rotating handle 3005 respectively, and the second connecting block 3002 and the third connecting block 3003 are fixedly connected with the first supporting cylinder sleeve 2901 and the second supporting cylinder sleeve 2904 respectively;

the working principle is as follows:

when in use, the detection spraying and melting mechanism 28 is placed in an oil pipe, then the sliding ball 2807 is abutted to the inner wall of the oil pipe, then the electric coil roller 26 is rotated to make the sliding ball 2807 of the detection spraying and melting mechanism 28 slide downwards along the inner wall of the oil pipe, when wax is deposited on the inner wall of the oil pipe, the wax deposition area can provide inward extrusion force to the sliding ball 2807, then the sliding ball 2807 contracts towards the third housing 2801, and then drives the arc connecting rod 2806, the second sliding rod 2805 and the first sliding rod 2803 fixed with the sliding ball to move, so that the second slide bar 2805 drives the slide block 2808 fixed with it to press one side of the elastic block 2809, then, the elastic block 2809 is squeezed to deform to transmit pressure to the first pressure sensor 2810, the first pressure sensor 2810 generates pressure data P and transmits the pressure data P to the data acquisition module and the data processing module, the pressure data P of the inner wall of the oil pipe acquired by the first pressure sensor 2810 is acquired in real time, and the pressure data P is compared with a preset pressure range pa for analysis:

when P is less than pa, the control signal pb is not generated, when P is more than pa, the control signal pb is generated, and the data analysis module transmits the control signal pb to the element execution module through the processor;

after receiving the control signal pb, the element execution module immediately controls the third displacement sensor 2811 to work and generate a displacement point mark Qa, and also immediately controls the electric coil drum 26 to indirectly drive the double-ring-surface nozzle 2817 to move to the Qa position, at this time, the first electric push rod 10 works to drive the first slip ring 9 to extrude into the first transparent measuring barrel 8, the first transparent measuring barrel 8 is pressurized, so that the liquid medicine of the first liquid medicine storage 7 enters the double-ring-surface nozzle 2817 of the detection spraying and melting mechanism 28 through the first L-shaped connecting pipe 13 and the hose in sequence, then the liquid medicine is sprayed from the double-ring-surface nozzle 2817 to be sprayed to a wax deposition position on the inner wall of the oil pipe in an outward ring spraying manner, the first displacement sensor 11 moves along with the first slip ring 9, the displacement amount generated in real time by the first displacement sensor 11 is marked as Fa, and the Fa is transmitted to the data processing module;

when detecting that mechanism 28 moves down along the oil pipe inner wall, infrared sensor 2812 among them senses that there is mineral impurity in the crude oil in the oil pipe, scans it promptly, and after infrared sensor 2812 gathered mineral impurity's real-time area, marks it as real-time area data H and transmits to data analysis module, and carries out contrastive analysis with presetting area scope ha:

when H is less than ha, the control signal hb is not generated, and when H is more than or equal to ha, the control signal hb is generated;

after receiving the control signal hb, the element execution module immediately controls the third displacement sensor 2811 to work and generate a displacement point mark Qb, and also immediately controls the electric coil roller 26 to indirectly drive the double-ring-surface nozzle 2817 to move to the position of Qb, at this time, the second electric push rod 17 works to drive the second slip ring 16 to extrude into the second transparent measuring barrel 15, the second transparent measuring barrel 15 is pressurized, so that the liquid medicine in the second liquid medicine storage 14 enters the double-ring-surface nozzle 2817 of the detection spraying and melting mechanism 28 through the second L-shaped connecting pipe 20 and the hose in sequence, then the liquid medicine is sprayed to mineral impurities in an inward ring spraying manner from the double-ring-surface nozzle 2817, and the second displacement sensor 18 moves along with the second slip ring 16, marks the displacement mark Fb generated by the second displacement sensor 18 in real time, and transmits the displacement Fb to the data processing module;

Obtaining the oil quality condition D of the detecting and spraying and melting mechanism 28 in the process of melting the crude oil in the oil pipe, wherein

、

、

And

are all the weight coefficients of the correction, and,

＞

＞

＞

and e₁+e₂+e₃+e₄=5.72；

When the oil quality condition D is smaller than the preset value D, a first text signal is generated and transmitted to the signal output module, and the signal output module edits a character mark of 'excellent crude oil quality' according to the text signal and transmits the character mark to the display screen 4 for displaying; when the oil quality condition D is larger than or equal to the preset value D, a second text signal is generated and transmitted to the signal output module, and the signal output module edits a character mark of 'poor crude oil quality' according to the text signal and transmits the character mark to the display screen 4 for displaying;

the method comprises the steps that a spraying and melting mechanism 28, a first liquid medicine storage 7, a first transparent measuring barrel 8, a first sliding ring 9, a first electric push rod 10, a second liquid medicine storage 14, a second transparent measuring barrel 15, a second sliding ring 16 and a second electric push rod 17 which are matched with the spraying and melting mechanism are detected, the wax deposition on the inner wall of an oil pipe and mineral impurities contained in crude oil in the oil pipe are dissolved to reduce crude oil impurities, and collected data in the oil pipe are collected, analyzed and sorted and calculated respectively through a first pressure sensor 2810 and an infrared sensor 2812 in the spraying and melting mechanism 28, and a first displacement sensor 11 and a second displacement sensor 18 to analyze the quality of the crude oil; and the synchronous treatment of the paraffin layer f and mineral impurities is realized through simple and convenient structural design and simplified step operation, and the quality condition of the crude oil can be detected on the basis of structural optimization.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A quantitative dosing device with backflow self-protection function for an oilfield wellhead comprises a first shell (1), a sealing door (2), a control panel (3), a display screen (4), an indicator lamp (5), an alarm (6), a first displacement sensor (11), a second displacement sensor (18), a third displacement sensor (2811), a first pressure sensor (2810), a second pressure sensor (2816), an infrared sensor (2812), a first electromagnetic valve (12), a second electromagnetic valve (19), a third electromagnetic valve (22), an air pressure gauge (23), a first electric push rod (10) and a second electric push rod (17), and is characterized in that a first liquid medicine storage (7), a first transparent measuring tank (8), a second liquid medicine storage (14) and a second transparent measuring tank (15) are fixedly arranged in the first shell (1), and the first transparent measuring tank (8) is communicated with the first liquid medicine storage (7) through a pipeline, the second transparent measuring barrel (15) is communicated with the second liquid medicine storage (14) through a pipeline, and the first liquid medicine storage (7) and the second liquid medicine storage (14) are symmetrically arranged, the second transparent measuring barrel (15) and the first transparent measuring barrel (8) are symmetrically arranged at the opposite sides of the first liquid medicine storage (7) and the second liquid medicine storage (14), and the opposite sides of the first liquid medicine storage (7) and the second liquid medicine storage (14) are respectively connected with a first L-shaped connecting pipe (13) and a second L-shaped connecting pipe (20) in a penetrating way, the first electromagnetic valve (12) and the second electromagnetic valve (19) are arranged at the outer end of the first shell (1), the first electromagnetic valve (12) and the second electromagnetic valve (19) are respectively communicated with the top ends of the first liquid medicine storage (7) and the second liquid medicine storage (14) through pipelines, and a pipeline joint (25) is fixedly arranged at the lower end of the first shell (1);

the sliding type measuring device is characterized in that a first sliding ring (9) is arranged in the first transparent measuring barrel (8) in a sliding mode, the outer end of the first sliding ring (9) is abutted to the inner wall of the first transparent measuring barrel (8), the top end of a first electric push rod (10) is fixedly arranged on the first shell (1), the bottom end of the first electric push rod (10) slides to penetrate through the outer wall of the first transparent measuring barrel (8) and extends to the inner portion of the first transparent measuring barrel and then is fixedly connected with the top end of the first sliding ring (9), a first displacement sensor (11) is fixedly arranged at the joint of the first sliding ring (9) and the first electric push rod (10), a second sliding ring (16) is arranged in the second transparent measuring barrel (15) in a sliding mode, the outer end of the second sliding ring (16) is abutted to the inner wall of the second transparent measuring barrel (15), the top end of the second electric push rod (17) is fixedly arranged on the first shell (1), and the bottom end of the second electric push rod (17) slides to penetrate through the outer wall of the second transparent measuring barrel (15) (16) The top end of the second sliding ring (16) is fixedly connected with the top end of the second electric push rod (17), and the second displacement sensor (18) is fixedly arranged at the connection position of the second sliding ring (16) and the second electric push rod; an electric coil roller (26) is rotationally arranged in the pipeline joint (25), a cable is wound at the outer end of the electric coil roller (26), the head end of the cable is fixedly connected with the electric coil roller (26), the tail end of the cable is fixedly connected with a connecting support (27), and the top end of the connecting support (27) is fixedly connected with a detection spraying and melting mechanism (28) placed in an oil pipe through a bolt;

the data acquisition module is used for collecting wax precipitation condition information of the inner wall of the oil pipe and mineral impurity area condition information of crude oil in the oil pipe in the process that the oil pipe is inserted into the oil production area, and respectively transmitting the wax precipitation condition information and the mineral impurity area condition information to the data analysis module and the data processing module, wherein the wax precipitation condition information is pressure data of the inner wall of the oil pipe acquired by the first pressure sensor (2810), and the mineral impurity area condition information is area data of mineral impurities of the crude oil in the oil pipe scanned by the infrared sensor (2812); the data analysis module carries out real-time operation comparison analysis operation on the received wax precipitation condition information and mineral impurity area condition information;

the detection spraying and melting mechanism (28) comprises a third shell (2801), a first sliding cylinder sleeve (2802) and a second sliding cylinder sleeve (2804), a circulation oil duct is formed in the middle of the third shell (2801), an annular installation cavity for installing accessories is formed in the inner wall of the third shell (2801), the annular installation cavity is in a sealing state, the first sliding cylinder sleeve (2802) and the second sliding cylinder sleeve (2804) are fixedly arranged on the same side of the outer end of the third shell (2801), the first sliding cylinder sleeve (2802) and the second sliding cylinder sleeve (2804) are respectively provided with a plurality of the first sliding cylinder sleeve (2802), and one first sliding cylinder sleeve (2802) is correspondingly provided with one second sliding cylinder sleeve (2804);

the first sliding cylinder sleeve (2802) and the second sliding cylinder sleeve (2804) are respectively connected with a first sliding rod (2803) and a second sliding rod (2805) in a sliding manner, one side, far away from the third shell (2801), of the first sliding rod (2803) and the second sliding rod (2805) is fixedly connected with an arc-shaped connecting rod (2806), the bottom end, far away from the second sliding rod (2805), of the arc-shaped connecting rod (2806) is fixedly connected with a sliding ball (2807) abutted against the inner wall of an oil pipe, the second sliding rod (2805) penetrates through the outer wall of the second sliding cylinder sleeve (2804) in a sliding manner and is fixedly connected with a sliding block (2808), the outer end of the sliding block (2808) is abutted against the inner wall of the second sliding cylinder sleeve (2804), one side, far away from the second sliding rod (2805), of the sliding block (2808) is abutted against a block (2809), the outer end of the elastic block (2809) is abutted against the inner wall of the second sliding cylinder sleeve (2804), and the first pressure sensor (2810) is arranged on one side, far away from the elastic block (2809) and is abutted against the inner wall of the elastic block (2808), the first pressure sensor (2810) is fixedly arranged in an annular mounting cavity of the third shell (2801);

the third displacement sensor (2811) and the infrared sensor (2812) are both fixedly arranged in an annular mounting cavity of the third shell (2801), and the infrared sensor (2812) is arranged on one side of the third shell (2801) close to the circulating oil channel, a double-ring-surface nozzle (2817) which is respectively sprayed on the inner wall of the oil pipe and the central axis of the oil pipe is fixedly arranged at the top end of the third shell (2801), the double-ring-surface nozzle (2817) is provided with a medicine spraying hole, a ring-shaped clapboard is arranged in the double-ring-surface nozzle (2817), the ring-shaped clapboard and the double-ring-surface nozzle (2817) are of an integrated structure, the double-ring-surface nozzle (2817) and the annular partition plate are in clearance fit to form a first annular medicine spraying cavity and a second annular medicine spraying cavity, the first annular medicine spraying cavity is located on the outer side of the second annular medicine spraying cavity, the first annular medicine spraying cavity is in through connection with the first L-shaped connecting pipe (13) through a hose, and the second annular medicine spraying cavity is in through connection with the second L-shaped connecting pipe (20) through a hose.

2. The oilfield wellhead quantitative dosing device with backflow self-protection function as claimed in claim 1, wherein the data analysis module runs the specific steps of a comparative analysis operation as follows:

sa: acquiring pressure data at the inner wall of an oil pipe collected by a first pressure sensor (2810) in real time, calibrating the pressure data as P, comparing the pressure data P with a preset pressure range pa, and generating a control signal pb when P is larger than or equal to pa;

after receiving the control signal pb, the element execution module immediately controls the third displacement sensor (2811) to work and generate a displacement point mark Qa, and also immediately controls the electric coil roller (26) to indirectly drive the double-ring-surface nozzle (2817) to move to the position of Qa, at the moment, the first electric push rod (10) works to drive the first slip ring (9) to extrude into the first transparent measuring barrel (8), the first transparent measuring barrel (8) is pressurized, so that the liquid medicine of the first liquid medicine storage (7) sequentially passes through the first L-shaped connecting pipe (13) and the hose and enters the double-ring-surface nozzle (2817) of the detection spraying and melting mechanism (28), then the liquid medicine is sprayed to the wax deposition position of the inner wall of the oil pipe in an outward ring spraying manner from the double-ring-surface nozzle (2817), and the first displacement sensor (11) moves along with the first slip ring (9);

sb: acquiring area data of mineral impurities of crude oil in an oil pipe scanned by an infrared sensor (2812) in real time, calibrating the area data as H, comparing the area data with a preset area range ha, and generating a control signal hb when H is larger than or equal to ha;

after receiving the control signal hb, the element execution module immediately controls the third displacement sensor (2811) to work and generate a displacement point mark Qb, and also immediately controls the electric coil roller (26) to indirectly drive the double-ring-surface nozzle (2817) to move to a Qb position, at the moment, the second electric push rod (17) works to drive the second slip ring (16) to extrude into the second transparent measuring barrel (15), the second transparent measuring barrel (15) is pressurized, so that the liquid medicine in the second liquid medicine storage (14) enters the double-ring-surface nozzle (2817) of the detection spraying and melting mechanism (28) through the second L-shaped connecting pipe (20) and the hose, then the liquid medicine is sprayed to mineral impurities from the double-ring-surface nozzle (2817) in an inward ring spraying manner, and the second displacement sensor (18) moves along with the second slip ring (16);

the data acquisition module is also used for acquiring the displacement Fa generated by the first displacement sensor (11) and the displacement Fb generated by the second displacement sensor (18) and transmitting the displacement Fa and the displacement Fb to the data processing module;

after receiving H, P, Fa and Fb, the data processing module respectively marks the average values of the data in the descending process of the detection spraying and melting mechanism (28) in the oil pipe as U, V, W and Z, and the data processing module further marks the average values according to a formula

Obtaining the oil quality condition D of the detection spraying and melting mechanism (28) in the process of melting crude oil in the oil pipe,

、

、

and

are all the weight coefficients of the correction, and,

＞

＞

＞

and e₁+e₂+e₃+e₄= 5.72; when the oil quality condition D is smaller than the preset value D, a first text signal is generated and transmitted to the signal output module, and the signal output module edits a character mark of 'excellent crude oil quality' according to the text signal and transmits the character mark to the display screen (4) for displaying; and when the oil quality condition D is larger than or equal to the preset value D, a second text signal is generated and transmitted to the signal output module, and the signal output module edits a character mark of 'poor crude oil quality' according to the text signal and transmits the character mark to the display screen (4) for displaying.

3. The oilfield wellhead quantitative dosing device with backflow self-protection function as claimed in claim 1, wherein a first connecting block (2818) fixedly connected with the connecting support (27) is further fixedly arranged at the top of the third housing (2801), the first connecting block (2818) is provided with a plurality of threaded holes, and a balancing weight (2819) is movably arranged in the annular mounting cavity of the third housing (2801);

the bottom end of one side, close to the circulation oil duct, of the third shell (2801) is further fixedly provided with a sliding plate (2813), one side, close to the circulation oil duct of the third shell (2801), of the sliding plate (2813) is connected with a floating sheet (2814) in a sliding mode, one side, close to the sliding plate (2813), of the floating sheet (2814) is provided with a T-shaped protrusion, the sliding plate (2813) is provided with a sliding groove, the T-shaped protrusion is embedded into the sliding groove and is connected with the sliding groove in a sliding mode, the top end of the floating sheet (2814) is fixedly connected with a detection spring (2815) through spot welding, and the top end of the detection spring (2815) is fixedly connected with a second pressure sensor (2816).

4. The oilfield wellhead quantitative dosing device with backflow self-protection function as claimed in claim 1, wherein an anti-falling structure (2820) is further disposed at an outer end of the third housing (2801), the anti-falling structure (2820) is disposed above the first sliding cylinder, the anti-falling structure (2820) comprises a third sliding cylinder sleeve (2821) and a third sliding rod (2822), the third sliding cylinder sleeve (2821) is fixedly disposed in an annular mounting cavity of the third housing (2801), the third sliding rod (2822) is slidably disposed in the third sliding cylinder sleeve (2821), one end of the third sliding rod (2822) slidably penetrates through an inner wall of the third sliding cylinder sleeve (2821) and extends to an outer portion of the third sliding cylinder sleeve and is fixedly connected with a U-shaped mounting bar (2824), a falling roller (2826) is mounted in the middle of the U-shaped mounting bar (2824), and a retaining sleeve (2825) is disposed at a connection portion between the U-shaped mounting bar (2824) and the third sliding rod (2822), the outer end of the third sliding rod (2822) is also slidably sleeved with an anti-toppling spring (2823), and two ends of the anti-toppling spring (2823) are respectively abutted to the outer ends of the stop block (2825) and the third shell (2801).

5. The oilfield wellhead quantitative dosing device with backflow self-protection function as claimed in claim 1, wherein the first chemical liquid storage (7) and the second chemical liquid storage (14) are identical in structure, the first chemical liquid storage (7) comprises a second housing (701) and a first rotating rod (702), the first rotating rod (702) is rotatably arranged in the second housing (701), a first mixing turbofan (703) and a second mixing turbofan (704) are fixedly sleeved at the outer end of the first rotating rod (702), the flow directions of the first mixing turbofan (703) and the second mixing turbofan (704) are oppositely arranged, one end of the first rotating rod (702) extends to the outside through the inner wall of the second housing (701) and is fixedly connected with a first gear (705), the first gear (705) is arranged at the outer end of the first rotating rod (702) through a key sleeve, and the first gear (705) is in meshing connection with a driving assembly (31), the driving component (31) is simultaneously and respectively engaged with the first medical fluid reservoir (7) and the second medical fluid reservoir (14).

6. The oilfield wellhead quantitative dosing device with backflow self-protection function according to claim 5, characterized in that the driving component (31) comprises a servo motor (3101) and a second rotating rod (3102), the servo motor (3101) is fixedly arranged in the first shell (1), the second rotating rod (3102) is fixedly connected with an output shaft of the servo motor (3101), the second rotating rod (3102) is rotatably arranged in the first shell (1), and the outer end of the second rotating rod (3102) is fixedly sleeved with a second gear (3103), the second gear (3103) is symmetrically meshed with a third gear (3104), the third gear (3104) is fixedly connected with a third rotating rod (3105), the third gear (3104) is sleeved at the outer end of the third rotating rod (3105), the third rotating rod (3105) is rotatably arranged in the first shell (1), the third gear (3104) is respectively connected with the first medical fluid reservoir (7) and the second medical fluid reservoir (14) in a meshing manner.

7. The oilfield wellhead quantitative dosing device with backflow self-protection function as claimed in claim 1, characterized in that the bottom of the first housing (1) is provided with a plurality of adjusting support frames (29), and an adjusting assembly (30) is mounted on each adjusting support frame (29);

the adjusting support frame (29) comprises a first support cylinder sleeve (2901), a second support cylinder sleeve (2904) and a fourth slide bar (2902), two ends of the fourth slide bar (2902) are respectively arranged in the first support cylinder sleeve (2901) and the second support cylinder sleeve (2904) in a sliding mode, a support spring (2903) is sleeved at the outer end of the fourth slide bar (2902) in a sliding mode, and two ends of the support spring (2903) abut against the position between the first support cylinder sleeve (2901) and the second support cylinder sleeve (2904).

8. The oilfield wellhead quantitative dosing device with backflow self-protection function according to claim 7, wherein the adjusting assembly (30) comprises a bidirectional screw rod (3001), a second connecting block (3002) and a third connecting block (3003), the outer end of the bidirectional screw rod (3001) is symmetrically and threadedly sleeved on the second connecting block (3002) and the third connecting block (3003) respectively, two ends of the bidirectional screw rod (3001) are fixedly connected with an anti-falling block (3004) and a rotating handle (3005) respectively, and the second connecting block (3002) and the third connecting block (3003) are fixedly connected with the first supporting cylinder sleeve (2901) and the second supporting cylinder sleeve (2904) respectively.

9. The oilfield wellhead quantitative dosing device with the backflow self-protection function is characterized in that a pressure relief tank (21) is further arranged in the first shell, a third L-shaped connecting pipe (24) is connected to the pressure relief tank (21) in a penetrating mode, one end of the third L-shaped connecting pipe (24) penetrates through the inner wall of the first shell (1), extends into the pipeline joint (25) and is connected with the pipeline joint in a penetrating mode, the air pressure gauge (23) is connected with the pressure relief tank (21) in a penetrating mode through a pipeline, and the air pressure gauge (23) is arranged on the outer side of the first shell (1).