CN218001188U - Pipeline internal coating leak source on-line measuring device - Google Patents

Abstract

The utility model discloses an online detection device for coating leakage points in a pipeline, which is characterized by comprising a leakage point detection device, a mobile device and a detection line; the leakage point detection device comprises a control assembly, a brush electrode and a grounding electrode; the electric brush electrode and the grounding electrode are electrically connected with the control component; one end of the detection line is connected with the ground electrode, and the other end of the detection line is grounded; the mobile device comprises a shell, a driving wheel set, a driven wheel set and a driving motor; the electric brush electrode is fixed on the shell; the driving wheel set and the driven wheel set are arranged on the shell; the driving wheel set comprises a plurality of first travelling wheels and first travelling wheel frames, and all the first travelling wheels are rotationally connected with the first travelling wheel frames; the driven wheel set comprises a plurality of second travelling wheels and second travelling wheel frames, and all the second travelling wheels are rotationally connected with the second travelling wheel frames; the driving motor drives the first travelling wheel to rotate. The utility model discloses can advance inside the pipeline to carry out quick effectual detection to the coating leak source, with the leak source detection demand that satisfies the long steel pipe inboard.

Description

Pipeline internal coating leak source on-line measuring device

Technical Field

The utility model relates to a corrosion-resistant coating detection area, more specifically the utility model relates to an in pipeline coating leak source on-line measuring device that says so.

Background

At present, the fluid medium is transported by steel pipes, and compared with other metal pipelines, the steel pipes can bear larger stress, have good plasticity and are convenient to weld, but the steel pipes have the defect of poor corrosion resistance. When corrosive media such as crude oil, ore pulp, seawater and desalinated seawater are conveyed, the inner wall of the pipeline needs to be coated with a corrosion-resistant material, so that a corrosion-resistant coating is formed on the inner wall of the pipeline, and the safety of the steel pipe during working is improved. After the corrosion-resistant coating is formed on the inner wall of the pipeline, usually, leak detection of the corrosion-resistant coating is required to be performed to judge whether the corrosion-resistant coating has a leak, so as to ensure that the corrosion-resistant coating of the finished steel pipe has no leak.

For the detection of the leakage point, the conventional detection method needs to adopt an electric spark leak detector. The specific steps of the missing point detection are as follows: the negative pole of the electric spark leak detector is grounded; the positive pole is then fixed on the extension rod, stretches into in the pipeline through the extension rod, and positive pole overlap joint is on the inner wall of steel pipe. If the lap joint of the positive electrode is coated with the corrosion-resistant coating, the positive electrode and the negative electrode cannot be conducted; on the contrary, if the lapping part of the anode is not coated with the corrosion-resistant coating, namely the lapping part is a leakage point, the anode is conducted with the cathode through the steel pipe, and an air gap is formed to be punctured to generate spark discharge.

In the prior art, when detecting the corrosion-resistant coating on the inner side of the pipeline, a worker is required to hold an extension rod by hand, extend the anode of the electric spark leak detector into the pipeline, and adjust the position of the electric spark leak detector through the extension rod. When the length of pipeline is longer, receive the length restriction of extension rod, this kind of detection mode will only be close to orificial region to the pipeline and carry out the leak source and detect, to the place that the extension rod of pipeline depths can't reach, then can't carry out the leak source and detect, just also can't confirm the coating condition of the inboard corrosion-resistant coating of whole steel pipe. In addition, in the process of moving the extension rod by a worker, the worker needs a certain time to observe and adjust the extension rod so as to change the position of the anode of the electric spark leak detector in the pipeline. This undoubtedly increases the workload of the worker, thereby increasing the time required for the missing point detection and reducing the missing point detection efficiency.

Therefore in corrosion-resistant coating detection area, provide one kind and can advance inside the pipeline to carry out quick effectual detection to the inboard coating leak source of pipeline, with satisfy the inboard corrosion-resistant coating leak source detection demand of long steel pipe, reduce staff's work load simultaneously, shorten the leak source and detect required time, improve leak source detection efficiency, become the present problem that awaits solution at present in the field.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a pipeline undercoating leak source on-line measuring device, it can be inside advancing at the pipeline to carry out quick effective detection to the inboard coating leak source of pipeline, with satisfying the inboard corrosion-resistant coating leak source detection demand of long steel pipe, reduce staff's work load simultaneously, shorten the leak source and detect required time, improve leak source detection efficiency.

In order to achieve the above purpose, the utility model provides a following technical scheme: an online detection device for a leak source of a coating in a pipeline comprises a leak source detection device, a moving device and a detection line;

the leakage point detection device comprises a control assembly, an electric brush electrode and a grounding electrode; the electric brush electrode and the grounding electrode are electrically connected with the control component; one end of the detection line is connected with the grounding electrode, and the other end of the detection line is grounded;

the mobile device comprises a shell, a driving wheel set, a driven wheel set and a driving motor; the electric brush electrode is fixedly connected with the shell and is attached to the inner wall of the pipeline; the driving wheel set and the driven wheel set are respectively provided with at least one, and all driving wheel sets and all driven wheel sets are arranged along the axis of the shell; the driving wheel set comprises a plurality of first travelling wheels and a first travelling wheel frame, all the first travelling wheels are distributed around the axis of the shell and are rotationally connected with the first travelling wheel frame, and the first travelling wheel frame is fixedly connected with the shell; the driven wheel set comprises a plurality of second travelling wheels and second travelling wheel frames, all the second travelling wheels are distributed around the axis of the shell and are rotationally connected with the second travelling wheel frames, and the second travelling wheel frames are fixedly connected with the shell; the driving motor drives at least one first travelling wheel to rotate.

Through adopting the technical scheme, the utility model discloses can advance inside the pipeline to carry out quick effectual detection to the inboard coating leak source of pipeline, with satisfying the inboard corrosion-resistant coating leak source detection demand of long steel pipe, reduce staff's work load simultaneously, shorten the leak source and detect required time, improve leak source detection efficiency.

The utility model discloses further set up to: the pay-off assembly comprises a wheel carrier, a pay-off shaft and a torsion return spring, the pay-off shaft is rotatably connected with the wheel carrier, two ends of the torsion return spring are fixedly connected with the pay-off shaft and the wheel carrier respectively, and the detection line is grounded after being wound by the pay-off shaft.

Through adopting above-mentioned technical scheme, driving motor closes the back, the utility model discloses can retrieve the detection line and the control line that have released with the help of torsion reset spring self elasticity, pull back the mouth of pipe with mobile device and leak source detection device to the staff retrieves.

The utility model discloses further set up to: the wheel carrier and the grounding metal block are fixedly connected with the magnetic attraction seat, and the grounding end of the detection line is connected with the grounding metal block.

The utility model discloses further set up to: the lead wire assembly comprises a lead wire rod and a turning wheel, the lead wire rod is used for supporting the turning wheel at the pipe orifice, and the part, located between the pay-off shaft and the grounding electrode, of the detection line winds the turning wheel.

The utility model discloses further set up to: and the detection line is marked with scale marks from the connection part of the detection line and the grounding electrode.

By adopting the technical scheme, the worker can conveniently determine the position of the leakage point in the axial direction of the pipeline according to the scale marks.

The utility model discloses further set up to: the alarm is electrically connected with the detection line and used for making at least one of sound reminding and light reminding.

By adopting the technical scheme, when the area of the pipeline brushed by the electric brush electrode is a leakage point, namely the area is not normally coated with the corrosion-resistant coating, the voltage of the detection line rises, and the alarm gives a prompt.

The utility model discloses further set up to: the device also comprises a controller and a control line, wherein the two ends of the control line are respectively connected with the driving motor and the controller.

Through adopting above-mentioned technical scheme, the controller can set up in the pipeline outside, and the staff of being convenient for controls driving motor in the pipeline outside.

The utility model discloses further set up to: the driving wheel set also comprises first rotating shafts, and each first travelling wheel corresponds to one first travelling wheel frame and one first rotating shaft; one end of the first travelling wheel frame is fixedly connected with the shell, and the other end of the first travelling wheel frame is rotatably connected with the corresponding first travelling wheel through a first rotating shaft.

The utility model discloses further set up to: the driven wheel set also comprises a second rotating shaft, the second travelling wheel frame comprises a supporting part and two connecting parts, and the two connecting parts are respectively fixed at the two ends of the supporting part; a second travelling wheel frame is arranged between every two adjacent second travelling wheels, and two connecting parts of the second travelling wheel frame are respectively close to the two second travelling wheels; each second travelling wheel is rotatably connected with the two connecting parts close to the second travelling wheel through a second rotating shaft; all the supporting parts are fixedly connected with the shell.

The utility model discloses further set up to: still including detecting the power, detect the power and be connected with the control assembly electricity, detect power, control assembly and telluric electricity field all with casing fixed connection.

To sum up, the utility model discloses compare and have following beneficial effect in prior art:

1. the utility model discloses can advance inside the pipeline to carry out quick effectual detection to the inboard coating leak source of pipeline, with satisfying the inboard corrosion-resistant coating leak source detection demand of long steel pipe, reduce staff's work load simultaneously, shorten the leak source and detect required time, improve leak source detection efficiency.

2. After driving motor closed, the utility model discloses can retrieve the detection line and the control line that have released with the help of the elasticity of torsion reset spring self, pull back the mouth of pipe with mobile device and leak source detection device to the staff retrieves.

3. The utility model discloses can judge the leak source position according to the scale on the detection line.

Drawings

FIG. 1 is a schematic view of the present embodiment installed in a pipeline;

fig. 2 is a schematic view showing a second carriage structure.

In the figure: 1. a missing point detection device; 11. an electric brush electrode; 12. a ground electrode; 13. detecting a power supply; 2. a mobile device; 21. A housing; 22. a driving wheel set; 221. a first traveling wheel; 222. a first carriage; 223. a first rotating shaft; 23. a driven wheel set; 231. a second travelling wheel; 232. a second carriage; 2321. a support portion; 2322. a connecting portion; 233. a second rotating shaft; 24. a drive motor; 25. a synchronous belt; 3. detecting lines; 4. a control line; 5. a controller; 6. a pay-off assembly; 61. a wheel carrier; 62. a pay-off shaft; 7. a magnetic attraction seat; 8. a grounding metal block; 9. a lead assembly; 91. a wire-guiding rod; 92. a turning wheel; 10. An alarm; 101. and an alarm signal line.

Detailed Description

The technical solution of the present invention will be described clearly with reference to the accompanying drawings, and it is obvious that the described embodiments are not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "rear", "transverse", "longitudinal", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Examples

As shown in fig. 1-2, which is a basic structure of a preferred embodiment of the present invention, an online detection device for coating leakage points in a pipeline includes a leakage point detection device 1, a moving device 2, a detection line 3, a control line 4 and a controller 5; the leakage point detection device 1 comprises a control assembly, a brush electrode 11, a grounding electrode 12 and a detection power supply 13; the brush electrode 11 and the grounding electrode 12 are both electrically connected with a control assembly, and the control assembly is electrically connected with a detection power supply 13; one end of the detection line 3 is connected with the grounding electrode 12, and the other end is grounded.

The moving device 2 includes a housing 21, a driving wheel set 22, a driven wheel set 23, and a driving motor 24. Brush electrode 11 is fixed connection at casing 21 front end and pastes with the pipeline inner wall, and control assembly installs in casing 21, detects power 13 and casing 21 fixed connection, and earthing electrode 12 is fixed at casing 21 rear end. At least one driving wheel set 22 and at least one driven wheel set 23 are arranged, and all driving wheel sets 22 and all driven wheel sets 23 are arranged along the axis of the shell 21. In this embodiment, one driving wheel set 22 and one driven wheel set 23 are respectively disposed, the driving wheel set 22 is installed at the front end of the housing 21, and the driven wheel set 23 is installed at the rear end of the housing 21.

The driving wheel set 22 includes a plurality of first traveling wheels 221 and a first traveling wheel frame 222, all the first traveling wheels 221 are uniformly arranged around the axis of the housing 21 and abut against the inner side wall of the pipeline, all the first traveling wheels 221 are rotatably connected with the first traveling wheel frame 222, and the first traveling wheel frame 222 is fixedly connected with the housing 21. The driving motor 24 is fixed to the housing 21 and drives at least one first traveling wheel 221 to rotate. The both ends of control line 4 are connected driving motor 24 and controller 5 respectively, and controller 5 is located the pipeline outside, and the staff of being convenient for is at pipeline outside control driving motor 24, and then drives leak source detection device 1 through mobile device 2 and walks in the pipeline.

The driving wheel set 22 further comprises first rotating shafts 223, and each first traveling wheel 221 corresponds to one first traveling wheel frame 222 and one first rotating shaft 223; in this embodiment, the first wheel carriage 222 is a long rod, one end of which is fixedly connected to the housing 21, and the other end of which is rotatably connected to the corresponding first wheel 221 through a first rotating shaft 223. The length direction of the long rod in this embodiment is the radial direction of the housing 21. In this embodiment, four first traveling wheels 221, four first traveling wheel frames 222, and four first rotating shafts 223 are provided. Specifically, the length of the long rod is telescopic.

Specifically, in the present embodiment, the driving motor 24 only drives one first traveling wheel 221 to rotate, the first traveling wheel 221 is a power wheel, and the corresponding first rotating shaft 223 is a power shaft. The power wheel is fixedly connected with the power shaft, and the power shaft is fixedly connected with an output shaft of the driving motor 24.

Specifically, the moving device 2 further includes a synchronous belt 25, and the power shaft is connected to the output shaft of the driving motor 24 through the synchronous belt 25 to realize power transmission.

In this embodiment, the driven wheel set 23 includes a plurality of second traveling wheels 231 and second traveling wheel frames 232, all the second traveling wheels 231 are arranged around the axis of the housing 21 and abut against the inner side wall of the pipeline, all the second traveling wheels 231 are rotatably connected with the second traveling wheel frames 232, and the second traveling wheel frames 232 are fixedly connected with the housing 21; the driving motor 24 drives at least one first traveling wheel 221 to rotate.

The driven wheel set 23 further includes a second rotating shaft 233, the second wheel carrier 232 includes a supporting portion 2321 and two connecting portions 2322, and the two connecting portions 2322 are respectively fixed at two ends of the supporting portion 2321; a second carriage 232 is arranged between every two adjacent second traveling wheels 231, and two connecting parts 2322 of the second carriage 232 are respectively close to the two second traveling wheels 231; each second traveling wheel 231 is rotatably connected with the two adjacent connecting parts 2322 through a second rotating shaft 233; all the support portions 2321 are fixedly connected to the housing 21. In this embodiment, four second traveling wheels 231, four second traveling wheel frames 232, and four second rotating shafts 233 are provided.

Specifically, the support 2321 protrudes in a direction approaching the housing 21 so as to be fixedly coupled with the housing 21.

The present embodiment further includes a paying-off assembly 6, the paying-off assembly 6 includes a wheel carrier 61, a paying-off shaft 62 and a torsion return spring, the paying-off shaft 62 is rotatably connected with the wheel carrier 61, two ends of the torsion return spring are respectively fixedly connected with the paying-off shaft 62 and the wheel carrier 61, the detection line 3 is grounded after winding around the paying-off shaft 62, and the control line 4 is connected with the controller 5 after winding around the paying-off shaft 62. When the moving device 2 is positioned at the pipe orifice of the pipeline, the torsion return spring is in an initial state. After the driving motor 24 is started, the moving device 2 drives the leak source detection device 1 to advance to the deep part of the pipeline, so that the detection line 3 and the control line 4 on the pay-off shaft 62 start to be released, and the torsion reset spring elastically deforms. After the driving motor 24 is turned off, the torsion return spring is not stressed any more and returns to the initial state, the pay-off shaft 62 starts to recover the released detection line 3 and the control line 4, and the moving device 2 and the leak source detection device 1 are pulled back to the pipe orifice so as to be conveniently recovered by a worker.

Specifically, the detection line 3 is marked with scale marks from the connection part with the grounding electrode 12.

The embodiment further comprises a magnetic attraction seat 7 and a grounding metal block 8, the grounding end of the detection line 3 is connected with the grounding metal block 8, the wheel carrier 61, the grounding metal block 8, the controller 5 and the alarm 10 are all fixed on the magnetic attraction seat 7, and the magnetic attraction seat 7 can be fixed on the outer side of the steel pipe in an adsorption mode.

The embodiment further comprises a lead assembly 9, the lead assembly 9 comprises a lead rod 91 and a turning wheel 92, one end of the lead rod 91 is fixed on the magnetic suction seat 7, the other end of the lead rod 91 is close to the axis of the steel pipe and is rotatably connected with the turning wheel 92, and the part of the detection line 3, which is located between the pay-off shaft 62 and the grounding electrode 12, winds around the turning wheel 92. The arrangement of the change wheel 92 can enable the detection line 3 between the grounding electrode 12 and the change wheel 92 to be parallel to the axis of the pipeline, so that a worker can accurately determine the position of a leakage point in the axial direction of the pipeline according to the scale marks.

The embodiment further comprises an alarm 10 and an alarm signal line 101, wherein two ends of the alarm signal line 101 are respectively connected with the detection line 3 and the alarm 10. The alarm 10 is adapted to emit at least one of an audible alert and a light alert. The alarm 10 in this embodiment is an audible and visual alarm 10 provided with an alarm lamp and a buzzer, wherein the alarm lamp includes a green lamp indicating a normal voltage and a red lamp indicating an abnormal voltage. When the area of the pipeline brushed by the electric brush electrode 11 is normally coated with the corrosion-resistant coating, the voltage of the detection wire 3 is normal, and the green lamp is lighted; when the area of the pipeline brushed by the electric brush electrode 11 is a leak point, namely the area is not normally coated with the corrosion-resistant coating, the voltage of the detection line 3 is increased, the red light is lightened, the buzzer sounds, and the position of the leak point in the axial direction of the pipeline can be determined according to the scale marks on the detection line 3 so as to be convenient for coating the corrosion-resistant coating again in the following process.

To sum up, this embodiment can advance inside the pipeline to carry out quick effectual detection to the inboard coating leak source of pipeline, with the corrosion-resistant coating leak source detection demand that satisfies the long steel pipe inboard, reduce staff's work load simultaneously, shorten the leak source and detect required time, improve leak source detection efficiency. And after the driving motor 24 is turned off, the embodiment can recover the released detection line 3 and the control line 4 by means of the elasticity of the torsion return spring, and pull the moving device 2 and the leak source detection device 1 back to the pipe orifice for the recovery of the staff. Finally, the embodiment can accurately judge the position of the missing point according to the scales on the detection line 3.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a pipeline undercoating leak source on-line measuring device which characterized in that: the device comprises a leakage point detection device (1), a moving device (2) and a detection line (3);

the leakage point detection device (1) comprises a control assembly, an electric brush electrode (11) and a grounding electrode (12); the electric brush electrode (11) and the grounding electrode (12) are electrically connected with the control assembly; one end of the detection line (3) is connected with the grounding electrode (12), and the other end is grounded;

the moving device (2) comprises a shell (21), a driving wheel set (22), a driven wheel set (23) and a driving motor (24); the electric brush electrode (11) is fixedly connected with the shell (21) and is attached to the inner wall of the pipeline; at least one driving wheel set (22) and at least one driven wheel set (23) are arranged, and all driving wheel sets (22) and all driven wheel sets (23) are arranged along the axis of the shell (21); the driving wheel set (22) comprises a plurality of first travelling wheels (221) and first travelling wheel frames (222), all the first travelling wheels (221) are arranged around the axis of the shell (21) and are rotationally connected with the first travelling wheel frames (222), and the first travelling wheel frames (222) are fixedly connected with the shell (21); the driven wheel set (23) comprises a plurality of second travelling wheels (231) and second travelling wheel frames (232), all the second travelling wheels (231) are arranged around the axis of the shell (21) and are rotationally connected with the second travelling wheel frames (232), and the second travelling wheel frames (232) are fixedly connected with the shell (21); the driving motor (24) drives at least one first travelling wheel (221) to rotate.

2. The online detection device for the coating leakage point in the pipeline as claimed in claim 1, wherein: still include unwrapping wire subassembly (6), unwrapping wire subassembly (6) include wheel carrier (61), unwrapping wire axle (62) and torsion reset spring, and unwrapping wire axle (62) rotates with wheel carrier (61) to be connected, torsion reset spring's both ends respectively with unwrapping wire axle (62) and wheel carrier (61) fixed connection, detection line (3) are ground connection behind unwrapping wire axle (62).

3. The online detection device for the coating leakage point in the pipeline as claimed in claim 2, wherein: the magnetic attraction type detection device is characterized by further comprising a magnetic attraction seat (7) and a grounding metal block (8), wherein the wheel carrier (61) and the grounding metal block (8) are fixedly connected with the magnetic attraction seat (7), and the grounding end of the detection line (3) is connected with the grounding metal block (8).

4. The on-line detection device for the coating leakage point in the pipeline as recited in claim 2, wherein: the wire guiding assembly (9) comprises a wire guiding rod (91) and a change wheel (92), the wire guiding rod (91) is used for supporting the change wheel (92) at the pipe orifice, and the detection line (3) is located between the pay-off shaft (62) and the grounding electrode (12) and partially winds around the change wheel (92).

5. The online detection device for the coating leakage point in the pipeline as claimed in claim 1, wherein: the detection line (3) is marked with scale marks from the connection part of the detection line and the grounding electrode (12).

6. The online detection device for the coating leakage point in the pipeline as claimed in claim 1, wherein: the alarm device is characterized by further comprising an alarm (10), wherein the alarm (10) is electrically connected with the detection line (3), and the alarm (10) is used for emitting at least one of sound reminding and light reminding.

7. The online detection device for the coating leakage point in the pipeline as claimed in claim 1, wherein: the device also comprises a controller (5) and a control line (4), wherein two ends of the control line (4) are respectively connected with the driving motor (24) and the controller (5).

8. The online detection device for the coating leakage point in the pipeline as claimed in claim 1, wherein: the driving wheel set (22) further comprises first rotating shafts (223), and each first travelling wheel (221) corresponds to one first travelling wheel frame (222) and one first rotating shaft (223); one end of the first travelling wheel frame (222) is fixedly connected with the shell (21), and the other end of the first travelling wheel frame is rotationally connected with the corresponding first travelling wheel (221) through a first rotating shaft (223).

9. The online detection device for the coating leakage point in the pipeline as claimed in claim 1, wherein: the driven wheel set (23) further comprises a second rotating shaft (233), the second wheel carrier (232) comprises a supporting part (2321) and two connecting parts (2322), and the two connecting parts (2322) are respectively fixed at two ends of the supporting part (2321); a second travelling wheel frame (232) is arranged between every two adjacent second travelling wheels (231), and two connecting parts (2322) of the second travelling wheel frame (232) are respectively close to the two second travelling wheels (231); each second travelling wheel (231) is rotatably connected with the two adjacent connecting parts (2322) through a second rotating shaft (233); all the supporting parts (2321) are fixedly connected with the shell (21).

10. The online detection device for the coating leakage point in the pipeline as claimed in claim 1, wherein: still including detecting power (13), detect power (13) and be connected with the control assembly electricity, detect power (13), control assembly and earthed electrode (12) and all with casing (21) fixed connection.

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