CN114893575A - Underwater vertically-installed chemical injection metering valve and installation method thereof - Google Patents

Abstract

The invention relates to an underwater vertically-installed chemical injection metering valve and an installation method thereof, wherein the metering valve comprises the following components: the packaging module comprises a packaging shell, an upper end plate and a lower end plate, wherein the upper end plate and the lower end plate are assembled at the upper end and the lower end of the packaging shell; the electronic control module is assembled on the lower end face of the upper end plate, is positioned in the packaging shell and is electrically connected with the overwater main control station; the regulating valve is assembled on the upper end face of the lower end plate and is positioned in the packaging shell, and a regulating valve actuating mechanism, a linear displacement sensor assembly and a pressure transmitter assembly which are electrically connected with the electronic control module are installed on the regulating valve; the flowmeter is assembled on the upper end face of the lower end plate and located in the packaging shell, and a flow transmitter electrically connected with the electronic control module is installed on the flowmeter. The metering valve realizes the integration of two functions of flow metering and flow regulation by adopting a mode that a flowmeter and a regulating valve are tightly connected in series and integrated.

Description

Underwater vertically-installed chemical injection metering valve and installation method thereof

Technical Field

The invention relates to an underwater vertically-installed chemical agent injection metering valve and an installation method thereof, belonging to the technical field of deepwater oil extraction.

Background

The underwater production system is widely applied to deepwater oil and gas fields and development of marginal oil fields, the injection of chemical agents plays an important role in the development of ocean oil and gas resources, the chemical agents are mainly used for improving the working efficiency of production equipment related to the underwater production system, protecting the normal operation of the production equipment and a wellhead pipeline, prolonging the durability of the equipment and the like. The underwater chemical injection metering valve is key equipment of an underwater production system, has the functions of providing chemical injection, metering and flow control for development of underwater oil and gas fields, simultaneously has installation operation of a diver or an underwater robot, can be independently recycled when the equipment needs to be overhauled or maintained, and can be secondarily lowered for installation after the maintenance and overhaul are finished.

The existing underwater chemical agent injection metering mode mainly comprises the following steps: independently metering chemical agents on the water production platform; the underwater chemical agent injection pipeline adopts a single metering mode, namely only one flow metering detection device is connected in series with the chemical agent pipeline. The scheme of metering the chemical agents on the water platform does not have the function of adjusting the injection amount of the chemical agents, and an additional adjusting valve needs to be arranged on the platform, so that the precious space resources of the platform are occupied, and the design requirement of compact integration of the platform is not met. Its flow detection device fault rate of scheme of single measurement is high, in case flow detection device breaks down, just loses the measurement function and can't obtain the accurate injection volume of chemical agent, and this produces harmful effects to the normal production transportation of oil gas under water, brings the potential safety hazard even.

Disclosure of Invention

The invention provides a chemical agent injection metering valve vertically installed underwater and an installation method thereof, wherein the metering valve realizes integration of two functions of flow metering and flow regulation by adopting a mode of tightly connecting and integrating a flow meter and a regulating valve in series, and an auxiliary flow metering method is used for calculating the flow of the regulating valve while the chemical agent is metered by using the flow meter to realize the flow metering method of the two chemical agents.

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

the present invention provides in a first aspect an underwater vertically mounted chemical injection metering valve comprising:

the packaging module comprises a packaging shell, an upper end plate and a lower end plate, wherein the upper end plate and the lower end plate are assembled at the upper end and the lower end of the packaging shell;

the electronic control module is assembled on the lower end face of the upper end plate, is positioned in the packaging shell and is electrically connected with the overwater main control station;

the regulating valve is assembled on the upper end face of the lower end plate and is positioned in the packaging shell, and a regulating valve actuating mechanism, a linear displacement sensor assembly and a pressure transmitter assembly which are electrically connected with the electronic control module are installed on the regulating valve;

the flowmeter is assembled on the upper end face of the lower end plate and is positioned in the packaging shell, and a flow transmitter electrically connected with the electronic control module is installed on the flowmeter;

the flowmeter is connected with the regulating valve through a pipeline.

The chemical agent injection metering valve is characterized in that the chemical agent injection metering valve preferably comprises a regulating valve actuating mechanism, a servo motor, a reduction gearbox and a transmission mechanism, wherein the servo motor, the reduction gearbox and the transmission mechanism are sequentially connected in series, the transmission mechanism is connected with a regulating valve rod of the regulating valve, and the servo motor is installed on the lower end face of the upper end plate.

The chemical injection metering valve preferably further comprises a linear displacement sensor assembly including a first linear displacement sensor and a second linear displacement sensor, the first linear displacement sensor being connected to the regulator valve stem via a first drive link, the second linear displacement sensor being connected to the regulator valve stem via a second drive link.

The chemical injection metering valve, preferably, the pressure transmitter assembly includes a third pressure transmitter and a fourth pressure transmitter respectively installed at the inlet end and the outlet end of the regulating valve.

The chemical agent injection metering valve preferably further comprises a filter, the filter is assembled on the upper end face of the lower end plate and located in the packaging shell, and a first pressure taking module and a second pressure taking module are respectively installed at the inlet end and the outlet end of the filter.

The chemical agent injection metering valve preferably further comprises an installation locking/unlocking transmission module, wherein the installation locking/unlocking transmission module is assembled in the packaging shell and comprises a transmission shaft, a rotation fixing pin, a movement guider and a latch which are sequentially connected in series.

Preferably, the movement guide is provided with a movement guide groove for restricting a movement stroke of the latch.

The chemical agent injection metering valve is characterized in that preferably, a torque tool interface is installed on the upper end face of the upper end plate, the lower end of the torque tool interface is connected with the transmission shaft, and the upper end of the torque tool interface is used for being connected with a torque tool.

Preferably, the lower end surface of the lower end plate is provided with an inflow hydraulic connector female end and an outflow hydraulic connector female end which are respectively integrated with an inflow hydraulic connector male end and an outflow hydraulic connector male end assembled on a valve seat of a matched installation base to form a chemical inflow interface and a chemical outflow interface.

Preferably, the lower end surface of the lower end plate is further provided with an electric connector pin end and a guide pin, the electric connector pin end is connected with an electric connector hole end on the valve seat, and the guide pin is connected with a guide pin hole on the valve seat.

A second aspect of the present invention provides a method of mounting the above chemical injection metering valve, comprising the steps of:

a diver or an underwater robot grabs a lifting ring on the chemical agent injection metering valve or conveys the lifting ring or a handle to the position above a matched installation foundation, then the lifting ring is placed into an installation sleeve, the lifting ring is rotated to align the handle with the guide groove, the underwater chemical agent injection metering valve is lowered, a first guide pin and a second guide pin which are positioned on the lower end plate penetrate through a corresponding first guide pin hole and a corresponding second guide pin hole on the valve seat under the guidance of the guide groove, and a latch penetrates through the latch groove to realize primary alignment; a diver or an underwater robot receives a torque tool to the torque tool interface, the torque tool is rotationally operated to drive the transmission shaft to rotate, the latch moves under the regulation of the movement guide groove, the latch rotates to be locked with the latch groove in a staggered mode, the torque tool continues to rotate, the latch is changed from rotating motion to linear backward pulling motion under the restriction of the movement guide groove, in the process, the female end of the inflow hydraulic connector and the female end of the outflow hydraulic connector are respectively in butt joint with the male end of the inflow hydraulic connector and the male end of the outflow hydraulic connector to achieve secondary guiding, the needle end of the underwater electric connector and the hole end of the electric connector are in butt joint to achieve tertiary guiding, the diver or the underwater robot takes out the torque tool, and installation is completed.

Due to the adoption of the technical scheme, the invention has the following advantages:

1. the metering valve simultaneously adopts the flowmeter and the regulating valve, can simultaneously have flow metering and flow regulating functions, is convenient for remotely measuring and monitoring the injection amount of the underwater chemical agent, and can realize the flow fixed value closed-loop control to ensure the stable and continuous injection of the chemical agent. Due to the adoption of the design of two flow metering modes, when the flow meter is not accurately metered or fails, the chemical agent metering function still works normally and is not invalid, so that the reliability of the chemical agent injection metering system is improved.

2. The device is designed according to the standard of API, wherein the torque tool interface is a rotary high-torque interface of API 17H fourth class, the handle is a TYPE A standard handle in API 17H, the standard communication of API 17F is adopted, the device can be conveniently and rapidly in communication connection with corresponding equipment of an underwater production system, the communication compatibility of the underwater chemical agent injection metering valve is improved, the standard design is adopted, a universal tool is convenient to install or disassemble and recover the underwater chemical agent injection metering valve, the operability of the device is improved, and the installation/recovery cost is reduced.

3. The device disclosed by the invention does not depend on single flowmeter metering output, and a high-precision flow measurement value is output through the fusion of flow data of the flowmeter and the regulating valve, so that the condition that the metering cannot be carried out or is inaccurate due to the fault of the flowmeter is avoided.

4. The device of the invention corresponds to the guide structures of the matched installation foundation one by one, realizes the coarse alignment, the first-stage guide, the second-stage guide and the third-stage guide in the installation process, and improves the installation reliability of the underwater chemical agent injection metering valve.

Drawings

FIG. 1 is a schematic diagram of the operation of an underwater chemical injection metering valve according to one embodiment of the present invention;

fig. 2a is a front view of the underwater chemical injection metering valve provided in the embodiment of the present invention, and fig. 2b is a perspective view of the apparatus;

FIG. 3a is a cross-sectional view of the underwater chemical injection metering valve provided in the embodiment of the present invention, and FIG. 3b is another angle cross-sectional view of the device;

FIG. 4 is a cross-sectional view of a regulator valve in the subsea chemical injection metering valve provided in accordance with the present embodiment of the invention;

FIG. 5 is a schematic diagram of a mating installation base adapted to the apparatus of the present invention;

FIG. 6 is a schematic view of a mounting sleeve of the mating mounting base of FIG. 5;

FIG. 7 is a schematic view of the valve seat of the mating mounting base of FIG. 5;

FIGS. 8 and 9 are schematic views of the vertical mounting of the underwater chemical injection metering valve provided in this embodiment of the present invention to a mating mounting base;

the labels in the figure are as follows:

1-lifting a ring; 2-torque tool interface; 3-a handle; 4-packaging the shell; 5-pressing the effluent liquid to the female end of the connector; 6-quick plug-in hydraulic joint; 7-electrical connector pin ends; 8-latching; 9-flowing into the hydraulic connector female end; 10-lower end face; 11-an electronic control module; 12-a drive shaft; 13-rotating fixed pins; 14-a first pressure transmitter; 15-a first pressure taking module; 16-a filter; 17-a second pressure transmitter; 18-a second pressure taking module; 19-a motion director; 20-a motion guide channel; 21-upper end plate; 22-a servo motor; 23-a reduction gearbox; 24-a transmission mechanism; 25-a first linear displacement sensor; 26-a regulating valve; 27-a third pressure transmitter; 28-a fourth pressure transmitter; 29-lower end plate; 30-a second linear displacement sensor; 31-a flow meter; 32-a flow transmitter; 33-an electrical connector; 34-regulating valve actuator; 35-a valve core fixing cavity; 36-a regulator valve stem; 37-a valve core; 38-needle valve seat; 39-a second transmission rod; 40-inflow hydraulic joint male end; 41-electrical terminal bore ends; 42-first guide pin hole; 43-a second guide pin hole; 44-a latching slot; 45-effluent liquid pressure joint male end; 46-mounting the sleeve; 47-a guide groove; 48-valve seat; 49-first transfer lever; 50-a first guide pin; 51-a second guide pin; 52-signal lines; 53-flow path; 54-a supply line; 55-chemical inlet; 56-chemical agent outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the terms "first," "second," "third," "fourth," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Before the specific scheme of the invention is explained, related industry standards are briefly described.

API: the American Petroleum Institute, commonly known as the American Petroleum Institute, is a standards-setting organization. The API standards are developed according to the procedures recognized by the API national standards institute, which ensures that the API standards are recognized by their strict technical standards and third party certification.

API 17F: the Standard for Subsea Production Control Systems is used for guiding design, manufacture, test, installation and operation of Subsea Control system products, and is called API STANDARD 17F 2017.

API 17H: the standard is named as API STANDARD 17H 2019 removed Operated Tools and Interfaces in subsystem Production Systems, and provides relevant design specifications for underwater remote operation Tools and Interfaces.

The metering valve simultaneously adopts the flowmeter and the regulating valve, can simultaneously have flow metering and flow regulating functions, is convenient for remotely measuring and monitoring the injection amount of the underwater chemical agent, and can realize the flow fixed value closed-loop control to ensure the stable and continuous injection of the chemical agent.

The technical scheme of the invention is explained in detail in the following with the accompanying drawings.

As shown in fig. 2a and 2b, the underwater chemical injection metering valve provided by the present invention comprises a package module including a package housing 4, and an upper end plate 21 and a lower end plate 29 mounted on upper and lower ends of the package housing 4; the handle 3 is arranged on the packaging shell 4, and the lifting ring 1 and the torque tool interface 2 are arranged on the upper end plate 21. The metering valve provided by the invention is provided with special valves for chemical agent flow metering, pressure detection and flow regulation at the same time, is used for injecting various chemical agents into an underwater oil-gas well, a manifold and an underwater Christmas tree, and can be independently recovered underwater and secondarily installed by a diver or an underwater robot.

As shown in fig. 3a and 3b, the metering valve of the present invention further includes an electronic control module 11, which is mounted on the lower end face of the upper end plate 21, is located in the packaging shell 4, and is electrically connected with the main control station on water; the regulating valve 26 and the flowmeter 31 are assembled on the upper end face of the lower end plate 29 and are positioned in the packaging shell 4, and a regulating valve actuating mechanism 34, a linear displacement sensor assembly and a pressure transmitter assembly which are electrically connected with the electronic control module 11 are installed on the regulating valve 26; a flow transmitter 32 electrically connected with the electronic control module 11 is mounted on the flowmeter 31; the flow meter 31 is connected to the regulating valve 26 through a pipeline.

Further, as shown in fig. 3a and 3b, the regulating valve actuator 34 includes a servo motor 22, a reduction box 23 and a transmission mechanism 24 connected in series in sequence, the transmission mechanism 24 is connected with a regulating valve stem 36 of the regulating valve 26, and the servo motor 22 is mounted on the lower end surface of the upper end plate 21.

Further, as shown in fig. 3a and 3b, the linear displacement sensor assembly includes a first linear displacement sensor 25 and a second linear displacement sensor 30, the first linear displacement sensor 25 is connected with the regulator valve stem 36 through a first transmission rod 49, and the second linear displacement sensor 30 is connected with the regulator valve stem 36 through a second transmission rod 39. The pressure transmitter assembly comprises a third pressure transmitter 27 and a fourth pressure transmitter 28, mounted at the inlet end and the outlet end of the regulating valve 26, respectively.

Further, as shown in fig. 3a and 3b, the metering valve further includes a filter 16 assembled on the upper end surface of the lower end plate 29 and located inside the package housing 4, a first pressure taking module 15 and a second pressure taking module 18 are respectively installed at an inlet end and an outlet end of the filter 16, a first pressure transmitter 14 is installed on the first pressure taking module 15, and a second pressure transmitter 17 is installed on the second pressure taking module 18.

Further, as shown in fig. 3a and 3b, the metering valve further comprises an installation locking/unlocking transmission module assembled in the packaging shell 4, wherein the installation locking/unlocking transmission module comprises a transmission shaft 12, a rotation fixing pin 13, a movement guide 19 and a latch 8 which are sequentially connected in series, and the transmission shaft 12 is connected with an output end of the servo motor 22. The movement guide 19 is provided with a movement guide groove 20 for regulating the movement stroke of the latch 8. The lower end of the torque tool interface 2 is connected with the transmission shaft 12, and the upper end is used for connecting with a torque tool.

Further, as shown in fig. 3a and 3b, the lower end surface 10 of the lower end plate 29 is provided with an inflow hydraulic connector female end 9 and an outflow hydraulic connector female end 5, which respectively integrate a chemical inflow connection port and a chemical outflow connection port with an inflow hydraulic connector male end 40 and an outflow hydraulic connector male end 45 mounted on a valve seat 48 of a mating mounting base.

The lower end face 10 of the lower end plate 29 is further provided with an electric connector pin end 7 and a guide pin, the electric connector pin end 7 is connected with an electric connector hole end 41 on the valve seat 48, and the guide pin is connected with a guide pin hole on the valve seat 48.

As shown in fig. 6 and 7, the second aspect of the present invention provides an operation method of the metering valve, which comprises the following specific processes:

the underwater vertical installation process comprises the following steps: the underwater chemical injection metering valve needs to be vertically installed on a matched installation base, as shown in fig. 7; in the installation process, a diver/underwater robot grabs the lifting ring 1 or the handle 3 to convey the underwater chemical injection metering valve to the upper part of a matched installation foundation, the underwater chemical injection metering valve is placed in the installation sleeve 46, the lifting ring 1 is rotated to align the handle 3 with the guide groove 47 on the installation sleeve 46, the underwater chemical injection metering valve is lowered, under the guide of the guide groove 47, the first guide pin 50 and the second guide pin 51 on the lower end plate 29 penetrate through the corresponding first guide pin hole 42 and the second guide pin hole 43 on the valve seat 48, and the latch 8 penetrates through the latch groove 44 on the valve seat 48 to realize primary alignment; the diver/underwater robot connects a torque tool to the torque tool interface 2, the torque tool is rotationally operated to drive the transmission shaft 12 to rotate, the latch 8 moves under the regulation of the movement guide groove 20, the latch 8 rotates to be locked with the latch groove 44 in a staggered mode, the diver/underwater robot continues to rotate the torque tool, the latch 8 changes the rotation motion into linear backward pulling motion under the restriction of the movement guide groove 20, in the process, the female end 9 of the inflow hydraulic connector and the female end 5 of the outflow hydraulic connector are respectively in butt joint with the male end 40 of the inflow hydraulic connector and the male end 45 of the outflow hydraulic connector to realize secondary guidance, the needle end 7 of the underwater electric connector and the hole end 41 of the electric connector are in butt joint to realize tertiary guidance, and the diver/underwater robot takes out the torque tool to complete installation.

When the underwater chemical agent injection metering valve needs maintenance or breaks down and needs to be repaired, the recovery operation is carried out, and the recovery process is opposite to the installation process. Firstly, a diver/underwater robot dives to an installation position, a torque tool is connected to a torque tool interface 2, the torque tool is rotated reversely to enable underwater chemical injection metering valves to move linearly, at the same time, an inflow hydraulic connector female end 9, an outflow hydraulic connector female end 5 and an electric connector pin end 7 on a lower end plate 29 are separated from an inflow hydraulic connector male end 40, an outflow hydraulic connector male end 45 and an electric connector hole end 41 which correspond to a valve seat 48 respectively, self-sealing function is achieved, the torque tool is rotated continuously reversely, a latch 8 rotates to be parallel to a latch groove 44, and the diver/underwater robot injects the underwater chemical injection metering valves to an overwater platform through a lifting ring 1 to be repaired or maintained and then is installed again in a downward mode.

The flow measuring method and flow regulation of the metering valve of the invention are realized by the following processes: as shown in fig. 2 and 3, the chemical agent enters the underwater chemical agent injection metering valve from the inflow hydraulic joint female end 9, flows through the filter 16 along the pipeline, then flows through the flowmeter 31 for flow metering, the flow signal is uploaded to the electronic control module 11, and the flow is regulated through the regulating valve 26, at this time, the electronic control module 11 receives the flow control signal of the overwater main control station and downloads the control signal to the servo motor 22, the servo motor 22 drives the reduction gearbox 23 and the transmission mechanism 24 to move, and then drives the valve core 37 to move to change the throttle area of the regulating valve 26, so as to achieve the purpose of flow regulation, and finally the chemical agent flows out of the underwater chemical agent injection metering valve from the outflow hydraulic joint female end 5. The flow meter 31 needs to meet accurate metering at small flows, limited by the maximum and minimum flow rates of injection; according to the invention, while the flow of the chemical agent is metered by adopting the flow meter 31, two high-precision pressure transmitters (a third pressure transmitter 27 and a fourth pressure transmitter 28) are respectively arranged on the upstream and downstream of the regulating valve 26, two linear displacement sensors (a first linear displacement sensor 25 and a second linear displacement sensor 30) are arranged in the positive and negative parallel of the regulating valve rod 36 to offset the dead zone of the displacement sensors, and the flow of the chemical agent flowing through the regulating valve is calculated by the two pressure values and the valve core displacement, so that two flow metering methods are realized.

The working principle of the underwater chemical injection metering valve provided by the invention is shown in figure 1. The chemical agent enters the underwater chemical agent injection metering valve from a chemical agent inflow port, flows through the filter 16 along a pipeline to improve the cleanliness of the chemical agent injection metering valve, 2 pressure transmitters (a first pressure transmitter 14 and a second pressure transmitter 17 which are arranged on the first pressure taking module 15 and the second pressure taking module 18) are arranged at two ends of the filter and used for monitoring whether the filter 16 is blocked or not, the chemical agent flows through the flowmeter 31 to carry out flow metering, flow signals are uploaded to the electronic control module 11, flow regulation is carried out through the regulating valve 26, and finally the chemical agent enters the underground or a manifold from a chemical agent outflow port.

The flow regulation process comprises the following steps: the electronic control module 11 receives the flow control signal of the overwater main control station and transmits the control signal to the regulating valve actuating mechanism 34, and the regulating valve actuating mechanism 34 drives the valve core 37 to move according to the control signal, so that the throttling area of the regulating valve 26 is changed to achieve the purpose of flow regulation. 2 pressure transmitters (a third pressure transmitter 27 and a fourth pressure transmitter 28) are respectively arranged on the upstream and the downstream of the regulating valve 26 to upload pressure signals to the electronic control module 11, linear displacement sensors (a first linear displacement sensor 25 and a second linear displacement sensor 30) are arranged on a valve rod 36 of the regulating valve to upload displacement signals of a valve core 37 to the electronic control module 11, the configured 2 linear displacement sensors need to be arranged in a positive and negative parallel mode to offset dead zones of the sensors, the chemical agent flow passing through the regulating valve 26 is calculated through the uploaded pressure and the displacement of the valve core 37, and two flow metering modes are formed by the chemical agent flow and the flow output by the flow meter. The electronic control module 11 and the underwater control module need communication and power supply, and the communication is characterized by large data volume and high real-time requirement, so that a digital communication mode is adopted for communication; and the electronic control module 11 communicates with internal devices such as a pressure transmitter, a flowmeter 31, a regulating valve actuator 34 and a linear displacement sensor, obtains the working state of the underwater chemical injection metering valve, and simultaneously sends data to the underwater main control station through the underwater control module and receives a control instruction of the main control station. According to the definition requirements of API 17F standard on SIIS standard of an underwater instrument interface, an electronic control module 11 provides a standard SIIS interface with a 4-20mA standard analog quantity interface and a CANopen-based communication interface, and each functional board card adopts dual-redundancy configuration; according to the API 17F standard, the power supply voltage is required to be 24VDC, the power card needs to consider the board card power supply and the servo motor power supply at the same time, the power card has the capacity of bearing the instant large current impact, and the board cards are communicated through a backboard bus and packaged.

The chemical agent injection metering valve designed by the invention realizes integration of two functions of flow metering and flow regulation by adopting a mode of tightly connecting and integrating the flow meter 31 and the regulating valve 26 in series, and realizes two chemical agent flow metering methods by using an auxiliary flow metering method to calculate the flow of the regulating valve 26 while metering the chemical agent by using the flow meter 31. The metering precision of the metering valve is improved by 10 percent, and the injection time of chemical agents is shortened by 20 percent.

The invention meets the relevant requirements of the API 17F standard, designs an interface adopting the API standard to improve the universality and operability of the underwater chemical agent injection metering valve, and simultaneously adopts the interface standard (SIIS) of an underwater instrument specified by the API 17F standard as the communication mode of the chemical agent metering valve. The invention can accurately measure the injection amount of the chemical agent and accurately adjust the injection flow of the chemical agent according to the injection requirement without adding other flow measuring valves or adjusting valves.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. An underwater vertically mounted chemical injection metering valve comprising:

the packaging module comprises a packaging shell (4), and an upper end plate (21) and a lower end plate (29) which are assembled at the upper end and the lower end of the packaging shell (4);

the electronic control module (11) is assembled on the lower end face of the upper end plate (21), is positioned in the packaging shell (4), and is electrically connected with the overwater main control station;

the regulating valve (26) is assembled on the upper end face of the lower end plate (29) and is positioned in the packaging shell (4), and a regulating valve actuating mechanism (34), a linear displacement sensor assembly and a pressure transmitter assembly which are electrically connected with the electronic control module (11) are installed on the regulating valve (26);

the flowmeter (31) is assembled on the upper end face of the lower end plate (29) and is positioned in the packaging shell (4), and a flow transmitter (32) electrically connected with the electronic control module (11) is mounted on the flowmeter (31);

the flow meter (31) is connected to the control valve (26) via a line.

2. Chemical injection metering valve according to claim 1 characterized in that said regulating valve actuator (34) comprises a servo motor (22), a reduction box (23) and a transmission mechanism (24) connected in series in sequence, said transmission mechanism (24) being connected with a regulating valve stem (36) of said regulating valve (26), said servo motor (22) being mounted on the lower end face of said upper end plate (21).

3. Chemical injection metering valve according to claim 2 characterized in that the linear displacement sensor assembly comprises a first linear displacement sensor (25) and a second linear displacement sensor (30), the first linear displacement sensor (25) being connected to the regulating valve stem (36) by a first transmission rod (49) and the second linear displacement sensor (30) being connected to the regulating valve stem (36) by a second transmission rod (39).

4. Metering valve for the injection of chemical agents, according to claim 1, characterized in that said pressure transducer assembly comprises a third pressure transducer (27) and a fourth pressure transducer (28), respectively mounted at the inlet end and at the outlet end of said regulating valve (26).

5. The chemical injection metering valve according to claim 1, further comprising a filter (16) mounted on an upper end surface of the lower end plate (29) and located inside the package housing (4), an inlet end and an outlet end of the filter (16) being respectively mounted with a first pressure-taking module (15) and a second pressure-taking module (18).

6. Chemical agent injection metering valve according to claim 2 characterized by further comprising a mounting lock/unlock transmission module fitted within the package housing (4), the mounting lock/unlock transmission module comprising a transmission shaft (12), a rotation fixing pin (13), a movement guide (19) and a latch (8) connected in series in sequence.

7. Metering valve for the injection of chemical agents according to claim 6, characterized in that the movement guide (19) is provided with a movement guide (20) for limiting the movement stroke of the latch (8).

8. The chemical injection metering valve according to claim 6, wherein a torque tool interface (2) is mounted on an upper end surface of the upper end plate (21), a lower end of the torque tool interface (2) being connected to the drive shaft (12) and an upper end thereof being adapted to be connected to a torque tool.

9. Chemical injection metering valve according to claim 1, characterized in that the lower end face (10) of the lower end plate (29) is fitted with an inflow hydraulic connector female end (9) and an outflow hydraulic connector female end (5) which integrate a chemical inflow connection and a chemical outflow connection respectively with an inflow hydraulic connector male end (40) and an outflow hydraulic connector male end (45) fitted on a valve seat (48) of a mating mounting base;

and the lower end surface (10) of the lower end plate (29) is also provided with an electric connector pin end (7) and a guide pin, the electric connector pin end (7) is connected with an electric connector hole end (41) on the valve seat (48), and the guide pin is connected with a guide pin hole on the valve seat (48).

10. A method of mounting a chemical injection metering valve according to any one of claims 1 to 9, comprising the steps of:

a diver or an underwater robot grabs a lifting ring (1) on the chemical injection metering valve or conveys a handle (3) to the position above a matched installation foundation, then the lifting ring is placed into a mounting sleeve (46), the lifting ring (1) is rotated to align the handle (3) with the guide groove (47), the underwater chemical injection metering valve is lowered, a first guide pin (50) and a second guide pin (51) which are positioned on the lower end plate (29) pass through corresponding first guide pin holes (42) and second guide pin holes (43) on the valve seat (48) under the guidance of the guide groove (47), and a latch (8) passes through the latch groove (44) to realize primary alignment; a diver or an underwater robot connects a torque tool to the torque tool interface (2), the torque tool is rotationally operated to drive the transmission shaft (12) to rotate, the latch (8) moves under the regulation of the movement guide groove (20), the latch (8) rotates and is locked with the latch groove (44) in a staggered mode, the torque tool is continuously rotated, the latch (8) is changed from rotational movement into linear backward pulling movement under the restriction of the movement guide groove (20), in the process, the inflow hydraulic joint female end (9) and the outflow hydraulic joint female end (5) are respectively butted with the corresponding inflow hydraulic joint male end (40) and the corresponding outflow hydraulic joint male end (45) to realize secondary guiding, and the electric connector pin end (7) is butted with the electric connector hole end (41) to realize three-stage guiding, and a diver or an underwater robot takes out a torque tool to finish installation.

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