A device for leak detection of oil and gas pipelines
By designing a device that integrates infrared thermal imager, drive device, magnetorheological fluid and GPS positioning module, the problem of low leakage detection efficiency of long-distance oil and gas pipelines is solved, and efficient, stable and reliable leakage detection and positioning is achieved.
Patent Information
- Application Number
- CN201910200078.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-03-15
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2039-03-15
AI Technical Summary
The prior art is difficult to efficiently detect leakage points of oil and gas pipelines arranged at long distances, resulting in low detection efficiency and long time, difficulty in controlling oil and gas leakage in a timely manner, and may even cause accidents.
A device including an infrared thermal imager, a driving device, a piston cavity, a magnetorheological fluid, an electromagnet, a limiting mechanism and a GPS positioning module is designed. Through the infrared thermal imager, the driving device drives the device to move along the pipeline, and uses the magnetorheological fluid and an electromagnet to improve the movement stability. The limiting mechanism and rubber airbag prevent the device from tilting and sliding down, and the GPS module locates the leakage point.
It realizes efficient inspection of long-distance oil and gas pipelines, improves detection efficiency and stability, ensures the safety and reliability of the device during movement, and can position leakage points in a timely manner, and promotes timely repair.
Smart Images
Figure CN109838697B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of pipeline detection equipment and relates to a device for leak detection of oil and gas pipelines. Background Art
[0002] As we all know, fossil energy has always been the basic raw material on which the economies of all countries rely for development, but its mining and transportation problems have always plagued countries around the world. Currently, oil and gas transportation mainly relies on oil and gas pipelines. However, oil and gas pipelines are exposed to the external environment for a long time and are prone to aging, corrosion and other phenomena, resulting in frequent pipeline leakage accidents.
[0003] Since the oil and gas pipelines are arranged over long distances, it is very difficult to detect leaks. If the leaks are not controlled in time, it will not only cause energy waste and economic losses, but also may cause catastrophic accidents such as explosions and fires. Therefore, the safety of oil and gas pipelines is particularly important. Existing leak detection equipment is not suitable for oil and gas pipelines arranged over long distances. The detection efficiency is low and the detection time is long, which is not conducive to timely control of oil and gas leaks. Summary of the invention
[0004] The purpose of the present invention is to address the above problems in the prior art and to propose a device for leak detection in oil and gas pipelines, which can be applied to oil and gas pipelines arranged over long distances and has the advantages of high efficiency and short time consumption.
[0005] The object of the present invention can be achieved through the following technical solutions: a device for leak detection in oil and gas pipelines, comprising a device body, an infrared thermal imager is arranged on the front end surface of the device body, a driving device capable of moving the device body along the pipeline is arranged on the lower side surface of the device body, a cylindrical piston cavity is arranged in the device body, the length direction of the piston cavity is consistent with the width direction of the device body, through hole 2 and through hole 1 are respectively arranged at the left and right ends of the device body, the through hole 1 and through hole 2 are both connected to the piston cavity, piston 1 and piston 2 are slidably arranged in the piston cavity, through hole 3 is arranged on the piston 1, through hole 4 is arranged on the piston 2, the piston cavity is filled with magnetorheological fluid, an electromagnet is arranged on the lower side surface of the device body, and the piston 1 A tensioning spring is provided between the piston and the second piston, a piston rod 1 is fixedly connected to the side of the piston away from the piston 2, the piston rod 1 is slidably arranged on the device body through a through hole 1, the piston rod 1 is sealed with the device body, the free end of the piston rod 1 extends outside the device body and the lower side surface of the end is provided with a limiting mechanism 1 that can prevent the device body from tilting toward the side of the piston rod 1 when it moves at the top of the pipeline, the piston 2 is fixedly connected to the side of the piston away from the piston 1, the piston rod 2 is slidably arranged on the device body through a through hole 2, the piston rod 2 is sealed with the device body, the free end of the piston rod 2 extends outside the device body and the lower side surface of the end is provided with a limiting mechanism 2 that can prevent the device body from tilting toward the side of the piston rod 2 when it moves at the top of the pipeline.
[0006] The device is placed on the top of the pipeline, and the distance between the limit mechanism 1 on the piston rod 1 and the limit mechanism 2 on the piston rod 2 is adjusted by the expansion and contraction of the tension spring to adapt to pipelines of different sizes. After the device is adjusted to a suitable position, the device body is driven to move along the pipeline by the driving device. At this time, the tension spring is in a stretched state. The longer the tension spring is stretched, the greater the restoring force is, so that the limit mechanism 1 and the limit mechanism 2 always produce a pressing force on the outer wall of the pipeline, which can inhibit the device body from tilting to the left and right sides. At the same time, the electromagnet is started to attract the pipeline, ensuring that the device body always moves along the length direction of the pipeline and will not slide off the pipeline, so that the detection work can be carried out normally; in addition, under the action of the electromagnet, the fluid resistance of the magnetorheological fluid in the piston cavity increases, so that the positions of the piston 1 and the piston 2 remain relatively fixed, and the stability of the movement of the device body is improved. Then, the infrared thermal imager is used to detect the entire pipeline, which is simple and convenient.
[0007] In the above-mentioned device for leak detection in oil and gas pipelines, the driving device includes two driving mechanisms, and the two driving mechanisms are arranged in parallel at the front and rear ends of the device body. The driving mechanism includes a rotating shaft and two support plates, and the two support plates are vertically arranged on the lower side of the device body. The rotating shaft is rotatably arranged on the two support plates, and rollers are fixed on both ends of the rotating shaft. A motor is fixed on one of the support plates, and the output shaft of the motor is transmission-connected to the rotating shaft. An installation cavity is provided in the device body, and a controller and a battery are provided in the installation cavity, and the motor is electrically connected to the battery through the controller.
[0008] The motors in the two driving mechanisms are started simultaneously through the controller, and the rotating shaft is driven to rotate through gear 2 and gear 1, so that the rollers at both ends of the rotating shaft rotate, and the device body moves along the pipeline. Due to the existence of two motors, sufficient power can be provided to the device body, avoiding the problem that the entire device cannot work normally due to the failure of one motor, thereby improving the reliability of the device operation.
[0009] In the above-mentioned device for leak detection of oil and gas pipelines, an annular rubber airbag is provided on the outer side of the roller, and the rubber airbag is filled with liquid.
[0010] The rubber airbag arranged on the outside of the roller is deformed under the combined action of the gravity of the device body and the attraction of the electromagnet, which increases the contact area between the rubber airbag and the outer wall of the pipe, increases the friction, and prevents the device body from slipping off the pipe; in addition, the liquid in the rubber airbag plays a certain supporting role on the device body, preventing the rubber airbag from being severely deformed, resulting in excessive friction, affecting the movement speed of the device body, and reducing the efficiency of detection.
[0011] In the above-mentioned device for leak detection in oil and gas pipelines, the limiting mechanism comprises a base plate, an equipment box, a fixed shaft and a fixed pulley, the upper side of the base plate is hinged to the lower side of the piston rod by a hinge, the equipment box is fixedly arranged on the lower side of the base plate, one end of the fixed shaft is fixedly arranged on the lower side of the equipment box, the other end of the fixed shaft is rotatably provided with a roller, the fixed pulley is fixedly arranged on the lower side of the device body, a cylindrical equipment cavity is provided in the equipment box, a through hole is provided on the side of the equipment box close to the device body, the through hole is communicated with the equipment cavity, a fixing rod is provided on the axis of the equipment cavity, a volute spring is provided in the equipment cavity, the inner end of the volute spring is fixedly connected to the fixing rod, the outer end of the volute spring is fixedly connected to a pull rope, the free end of the pull rope passes through the through hole and extends to the outside of the equipment box, and the end is fixedly connected to the lower side of the device body through a fixed pulley.
[0012] Since the equipment box is hinged on the lower side of the piston rod through the base plate, when the size of the pipeline is large, the base plate drives the roller to rotate toward the side away from the pipeline, and the spiral spring rotates accordingly. The pull rope at the outer end of the spiral spring is stretched, and the spiral spring shrinks to generate a restoring force, so that the roller contacts the outer wall of the pipeline and generates an extrusion force. The motor is started to drive the device body to move on the pipeline, driving the roller to roll along the outer wall of the pipeline, which can prevent the device body from tilting toward the side of the piston rod during the movement, thereby improving the stability of the device body.
[0013] In the above-mentioned device for leak detection in oil and gas pipelines, the second limiting mechanism comprises a second base plate, a second equipment box, a second fixed shaft and a second fixed pulley, the upper side surface of the second base plate is hinged to the lower side surface of the second piston rod by a hinge, the second equipment box is fixedly arranged on the lower side surface of the second base plate, one end of the second fixed shaft is fixedly arranged on the lower side surface of the second equipment box, the other end of the second fixed shaft is rotatably provided with a second roller, the second fixed pulley is fixedly arranged on the lower side surface of the device body, the second equipment box is provided with a cylindrical equipment cavity, the second equipment box is provided with a through hole on one side close to the device body, the second through hole is connected with the second equipment cavity, the axis of the second equipment cavity is provided with a second fixed rod, the second equipment cavity is provided with a second volute spring, the inner end of the second volute spring is fixedly connected to the second fixed rod, the outer end of the second volute spring is fixedly connected to a pull rope, the free end of the second pull rope passes through the through hole and extends to the outside of the second equipment box, and the end is fixedly connected to the lower side surface of the device body through the second fixed pulley.
[0014] Since the equipment box 2 is hinged on the lower side of the piston rod 2 through the base plate 2, when the size of the pipeline is large, the base plate 2 drives the roller 2 to rotate to the side away from the pipeline, and the spiral spring 2 rotates accordingly. The pull rope 2 at the outer end of the spiral spring 2 is stretched, and the spiral spring 2 shrinks to generate a restoring force, so that the roller 2 contacts the outer wall of the pipeline and generates an extrusion force. The motor is started to drive the device body to move on the pipeline, driving the roller 2 to roll along the outer wall of the pipeline, which can prevent the device body from tilting to the side of the piston rod 2 during the movement, thereby improving the stability of the device body.
[0015] In the above-mentioned device for leak detection in oil and gas pipelines, an annular groove 1 is provided on the wheel surface of the roller 1, and a piezoelectric ceramic plate 1 is provided in the annular groove 1; an annular groove 2 is provided on the wheel surface of the roller 2, and a piezoelectric ceramic plate 2 is provided in the annular groove 2; the piezoelectric ceramic plate 1 and the piezoelectric ceramic plate 2 are both electrically connected to a battery; when the device body moves on the pipeline, the piezoelectric ceramic plate 1 and the piezoelectric ceramic plate 2 are always in contact with the outer wall of the pipeline; and the roller 1 and the roller 2 are both made of corrosion-resistant rubber material.
[0016] When roller one and roller two roll along the outer wall of the pipe, annular groove one on roller one and annular groove two on roller two increase the contact area with the outer wall of the pipe, which can better prevent the device body from tilting left and right during movement, and can also make the piezoelectric ceramic plate one in annular groove one squeezed with the outer wall of the pipe, and the piezoelectric ceramic plate two in annular groove two squeezed with the outer wall of the pipe. The piezoelectric ceramic plate one and the piezoelectric ceramic plate two generate electrical energy during the process of rotation and compression, which is stored in the battery, saving energy and protecting the environment.
[0017] In the above-mentioned device for leak detection in oil and gas pipelines, a GPS positioning module is provided on the upper side of the device body, and the GPS positioning module is electrically connected to a battery.
[0018] Start the motor to drive the device to move on the pipeline. When the infrared thermal imager detects a leak, it sends a signal to the controller. The controller turns off the motor in the drive device, and the device stays near the leak. The GPS positioning module sends the location information of the leak, so that maintenance personnel can reach the leak in time and repair the pipeline safely and reliably.
[0019] Compared with the prior art, the present invention has the following advantages:
[0020] 1. Place the device on the top of the pipeline to be inspected, adjust the distance between the limiting mechanism 1 on the piston rod 1 and the limiting mechanism 2 on the piston rod 2 by stretching the tension spring to adapt to pipelines of different sizes, and drive the device body to move along the pipeline through the driving device. The limiting mechanism 1 on the piston rod 1 and the limiting mechanism 2 on the piston rod 2 can prevent the device body from tilting left and right when moving on the top of the pipeline. At the same time, start the electromagnet to attract the pipeline, ensuring that the device body always moves along the length direction of the pipeline and will not slide off the pipeline, so that the detection work can be carried out normally; in addition, under the action of the electromagnet, the fluid resistance of the magnetorheological fluid in the piston cavity increases, so that the positions of the piston 1 and the piston 2 remain relatively fixed, and the stability of the movement of the device body is improved;
[0021] 2. The rubber airbag arranged on the outside of the roller is deformed under the combined action of the gravity of the device body and the attraction of the electromagnet, which increases the contact area between the rubber airbag and the outer wall of the pipe, increases the friction, and prevents the device body from sliding off the pipe; in addition, the liquid in the rubber airbag plays a certain supporting role on the device body, preventing the rubber airbag from being severely deformed, resulting in excessive friction, affecting the speed of the device body, and reducing the efficiency of detection;
[0022] 3. When the size of the pipeline is large, the scroll spring 1 in the equipment box 1 and the scroll spring 2 in the equipment box 2 are stretched at the same time, so that the roller 1 on the fixed shaft 1 and the roller 2 on the fixed shaft 2 contact the outer wall of the pipeline and generate a certain extrusion force, and then the motor is started to drive the device body to move. At the same time, the roller 1 and the roller 2 roll along the outer wall of the pipeline. The annular groove 1 on the roller 1 and the annular groove 2 on the roller 2 increase the contact area with the outer wall of the pipeline, which can better prevent the device body from tilting left and right during movement, and can also make the piezoelectric ceramic plate 1 in the annular groove 1 squeeze the outer wall of the pipeline, and the piezoelectric ceramic plate 2 in the annular groove 2 squeeze the outer wall of the pipeline. The piezoelectric ceramic plate 1 and the piezoelectric ceramic plate 2 generate electrical energy during the process of rotation and pressure, which is stored in the battery, saving energy and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of the device for leak detection in oil and gas pipelines;
[0024] Figure 2 yes Figure 1 Sectional view at AA in the middle;
[0025] Figure 3 yes Figure 1 Cross-section at the middle BB;
[0026] Figure 4 yes Figure 1 Sectional view at CC;
[0027] Figure 5 yes Figure 3 A partial enlarged view of point D in the middle;
[0028] Figure 6 It is a structural diagram of equipment box 1;
[0029] Figure 7 It is a structural diagram of equipment box 2.
[0030] In the figure: 1, pipeline; 2, device body; 2a, piston cavity; 2b, through hole 1; 2c, installation cavity; 2d, controller; 2e, battery; 2f, electromagnet; 2g, through hole 2; 3, infrared thermal imager; 4, piston rod 1; 4a, piston 1; 4b, through hole 3; 5, piston rod 2; 5a, piston 2; 5b, through hole 4; 6, rotating shaft; 6a, support plate; 6b, roller; 6c, rubber airbag; 6d, gear 1; 7, motor; 7a, gear 2; 8, base plate 1; 8a, equipment box 1; 8b, equipment cavity 1; 8c, through hole 1; 8 d, scroll spring one; 8e, fixed rod one; 9, fixed shaft one; 9a, roller one; 9b, annular groove one; 9c, piezoelectric ceramic plate one; 10, base plate two; 10a, equipment box two; 10b, equipment cavity two; 10c, perforation two; 10d, scroll spring two; 10e, fixed rod two; 11, fixed shaft two; 11a, roller two; 11b, annular groove two; 11c, piezoelectric ceramic plate two; 12, pull rope one; 12a, pull rope two; 13, tension spring; 14, fixed pulley one; 14a, fixed pulley two; 15, GPS positioning module. DETAILED DESCRIPTION
[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0032] like Figures 1 to 7As shown, a device for leak detection in oil and gas pipelines comprises a device body 2, a front end surface of the device body 2 is provided with an infrared thermal imager 3, a lower side surface of the device body 2 is provided with a driving device capable of moving the device body 2 along a pipeline 1, a cylindrical piston chamber 2a is provided in the device body 2, the length direction of the piston chamber 2a is consistent with the width direction of the device body 2, a through hole 2g and a through hole 1 2b are respectively provided at the left and right ends of the device body 2, the through hole 1 2b and the through hole 2g are both connected with the piston chamber 2a, a piston 1 4a and a piston 2 5a are slidably provided in the piston chamber 2a, a through hole 3 4b is provided on the piston 1 4a, a through hole 4 5b is provided on the piston 2 5a, the piston chamber 2a is filled with magnetorheological fluid, an electromagnet 2f is provided on the lower side surface of the device body 2, and the piston 1 4a and the piston 2 A tensioning spring 13 is provided between the piston 1 and the piston 5a, a piston rod 4 is fixedly connected to the side of the piston 1 4a away from the piston 2 5a, the piston rod 4 is slidably set on the device body 2 through a through hole 2b, the piston rod 4 is sealed with the device body 2, the free end of the piston rod 4 extends to the outside of the device body 2 and the lower side surface of the end is provided with a limiting mechanism 1 that can prevent the device body 2 from tilting toward the side of the piston rod 4 when it moves at the top of the pipeline 1, the piston 2 5a is fixedly connected to the side of the piston 1 4a away from the piston 1 4a, the piston rod 2 5 is slidably set on the device body 2 through a through hole 2g, the piston rod 2 5 is sealed with the device body 2, the free end of the piston rod 2 5 extends to the outside of the device body 2 and the lower side surface of the end is provided with a limiting mechanism 2 that can prevent the device body 2 from tilting toward the side of the piston rod 2 5 when it moves at the top of the pipeline 1.
[0033] The device is placed on the top of the pipeline 1, and the distance between the limit mechanism 1 on the piston rod 1 4 and the limit mechanism 2 on the piston rod 2 5 is adjusted by the expansion and contraction of the tension spring 13 to adapt to pipelines 1 of different sizes. After the device is adjusted to a suitable position, the device body 2 is driven by the driving device to move along the pipeline 1. At this time, the tension spring 13 is in a stretched state. The longer the tension spring 13 is stretched, the greater the restoring force is, so that the limit mechanism 1 and the limit mechanism 2 always produce a pressing force on the outer wall of the pipeline 1, which can inhibit the device body 2 from tilting to the left and right sides. At the same time, the electromagnet 2f is started to make the electromagnet 2f generate an attractive force on the pipeline 1, ensuring that the device body 2 always moves along the length direction of the pipeline 1 and will not slide off the pipeline 1, so that the detection work can be carried out normally; in addition, under the action of the electromagnet 2f, the fluid resistance of the magnetorheological fluid in the piston chamber 2a increases, so that the positions of the piston 1 4a and the piston 2 5a remain relatively fixed, and the stability of the movement of the device body 2 is improved. Then, the infrared thermal imager 3 is used to detect the entire pipeline, which is simple and convenient.
[0034] Specifically, the driving device includes two driving mechanisms, and the two driving mechanisms are arranged in parallel at the front and rear ends of the device body 2. The driving mechanism includes a rotating shaft 6 and two support plates 6a. The two support plates 6a are vertically arranged on the lower side of the device body 2. The rotating shaft 6 is rotatably arranged on the two support plates 6a. Rollers 6b are fixedly provided at both ends of the rotating shaft 6, and a motor 7 is fixedly provided on one of the support plates 6a. The output shaft of the motor 7 is transmission-connected with the rotating shaft 6. An installation cavity 2c is provided in the device body 2, and a controller 2d and a battery 2e are provided in the installation cavity 2c. The motor 7 is electrically connected to the battery 2e through the controller 2d.
[0035] The motors 7 in the two driving mechanisms are started simultaneously through the controller 2d, and the rotating shaft 6 is driven to rotate through the gear 2 7a and the gear 1 6d, so that the rollers 6b at both ends of the rotating shaft 6 rotate, and the device body 2 moves along the pipeline 1. Due to the existence of two motors 7, sufficient power can be provided to the device body 2, avoiding the problem that the entire device cannot work normally due to the failure of one motor 7, thereby improving the reliability of the device operation.
[0036] Specifically, an annular rubber airbag 6c is provided on the outer side of the roller 6b, and the rubber airbag 6c is filled with liquid.
[0037] The rubber airbag 6c arranged on the outside of the roller 6b is deformed under the combined action of the gravity of the device body 2 and the attraction of the electromagnet 2f, thereby increasing the contact area between the rubber airbag 6c and the outer wall of the pipe 1, increasing the friction force, and preventing the device body 2 from slipping off the pipe 1; in addition, the liquid in the rubber airbag 6c plays a certain supporting role on the device body 2, preventing the rubber airbag 6c from being seriously deformed, resulting in excessive friction, affecting the moving speed of the device body 2, and reducing the detection efficiency.
[0038] Specifically, the limiting mechanism includes a base plate 8, an equipment box 8a, a fixed shaft 9 and a fixed pulley 14. The upper side of the base plate 8 is hinged to the lower side of the piston rod 4 by a hinge. The equipment box 8a is fixed to the lower side of the base plate 8. One end of the fixed shaft 9 is fixed to the lower side of the equipment box 8a. The other end of the fixed shaft 9 is rotatably provided with a roller 9a. The fixed pulley 14 is fixed to the lower side of the device body 2. The equipment box 8a is provided with a cylindrical equipment cavity 8. b, a through hole 8c is provided on one side of the equipment box 8a close to the device body 2, the through hole 8c is communicated with the equipment cavity 8b, a fixing rod 8e is provided on the axis of the equipment cavity 8b, a volute spring 8d is provided in the equipment cavity 8b, the inner end of the volute spring 8d is fixedly connected to the fixing rod 8e, the outer end of the volute spring 8d is fixedly connected to a pull rope 12, the free end of the pull rope 12 passes through the through hole 8c and extends to the outside of the equipment box 8a, and the end is fixedly connected to the lower side of the device body 2 through a fixed pulley 14.
[0039] Since the equipment box 8a is hinged on the lower side of the piston rod 4 through the base plate 8, when the size of the pipeline 1 is large, the base plate 8 drives the roller 9a to rotate to the side away from the pipeline 1, and the spiral spring 8d rotates accordingly. The pull rope 12 at the outer end of the spiral spring 8d is stretched, and the spiral spring 8d shrinks to generate a restoring force, so that the roller 9a contacts the outer wall of the pipeline 1 and generates an extrusion force. The starting motor 7 drives the device body 2 to move on the pipeline 1, driving the roller 9a to roll along the outer wall of the pipeline 1, which can prevent the device body 2 from tilting toward the side of the piston rod 4 during the movement, thereby improving the stability of the device body 2.
[0040] Specifically, the limiting mechanism 2 includes a base plate 2 10, an equipment box 2 10a, a fixed shaft 2 11 and a fixed pulley 2 14a. The upper side of the base plate 2 10 is hinged to the lower side of the piston rod 2 5 by a hinge. The equipment box 2 10a is fixed on the lower side of the base plate 2 10. One end of the fixed shaft 2 11 is fixed on the lower side of the equipment box 2 10a. The other end of the fixed shaft 2 11 is rotatably provided with a roller 2 11a. The fixed pulley 2 14a is fixed on the lower side of the device body 2. The equipment box 2 10a is provided with a cylindrical equipment cavity 2 10b. A through hole 10c is provided on one side of the equipment box 10a close to the device body 2, and the through hole 10c is communicated with the equipment cavity 10b. A fixing rod 10e is provided on the axis of the equipment cavity 10b. A spiral spring 10d is provided in the equipment cavity 10b. The inner end of the spiral spring 10d is fixedly connected to the fixing rod 10e, and the outer end of the spiral spring 10d is fixedly connected to a pull rope 12a. The free end of the pull rope 12a passes through the through hole 10c and extends to the outside of the equipment box 10a, and the end is fixedly connected to the lower side of the device body 2 through a fixed pulley 14a.
[0041] Since the equipment box 10a is hinged on the lower side of the piston rod 5 through the base plate 10, when the size of the pipeline 1 is large, the base plate 10 drives the roller 11a to rotate to the side away from the pipeline 1, and the spiral spring 10d rotates accordingly. The pull rope 12a at the outer end of the spiral spring 10d is stretched, and the spiral spring 10d shrinks to generate a restoring force, so that the roller 11a contacts the outer wall of the pipeline 1 and generates an extrusion force. The starting motor 7 drives the device body 2 to move on the pipeline 1, driving the roller 11a to roll along the outer wall of the pipeline 1, which can prevent the device body 2 from tilting toward the side of the piston rod 5 during the movement, thereby improving the stability of the device body 2.
[0042] Specifically, an annular groove 9b is provided on the wheel surface of the roller 1 9a, and a piezoelectric ceramic plate 9c is provided in the annular groove 9b; an annular groove 11b is provided on the wheel surface of the roller 2 11a, and a piezoelectric ceramic plate 11c is provided in the annular groove 11b; the piezoelectric ceramic plate 1 9c and the piezoelectric ceramic plate 11c are both electrically connected to the battery 2e; when the device body 2 moves on the pipeline 1, the piezoelectric ceramic plate 1 9c and the piezoelectric ceramic plate 11c are always in contact with the outer wall of the pipeline 1; the roller 1 9a and the roller 2 11a are both made of corrosion-resistant rubber material.
[0043] When roller 1 9a and roller 2 11a roll along the outer wall of pipe 1, annular groove 1 9b on roller 1 9a and annular groove 2 11b on roller 2 11a increase the contact area with the outer wall of pipe 1, which can better prevent the device body 2 from tilting left and right during movement, and can also make the piezoelectric ceramic plate 1 9c in annular groove 1 9b squeeze the outer wall of pipe 1, and the piezoelectric ceramic plate 2 11c in annular groove 2 11b squeeze the outer wall of pipe 1. Piezoelectric ceramic plate 1 9c and piezoelectric ceramic plate 2 11c generate electric energy in the process of rotation and pressure, which is stored in battery 2e, which is energy-saving and environmentally friendly.
[0044] Specifically, a GPS positioning module 15 is provided on the upper side of the device body 2, and the GPS positioning module 15 is electrically connected to the battery 2e.
[0045] The starting motor 7 drives the device body 2 to move on the pipeline 1. When the infrared thermal imager 3 detects a leak, it sends a signal to the controller 2d. The controller 2d turns off the motor 7 in the drive device, and the device body 2 stays near the leak. The GPS positioning module 15 sends the location information of the leak so that maintenance personnel can reach the leak in time and repair the pipeline 1 safely and reliably.
[0046] Those skilled in the art to which the present invention relates may make various modifications, additions or substitute similar methods to the specific embodiments described, but they will not deviate from the spirit of the present invention or exceed the scope defined by the attached claims.
Claims
1. A device for leak detection in oil and gas pipelines, comprising a device body (2), characterized in that: An infrared thermal imager (3) is provided on the front end surface of the device body (2); a driving device capable of moving the device body (2) along the pipeline (1) is provided on the lower side surface of the device body (2); a cylindrical piston chamber (2a) is provided in the device body (2); the length direction of the piston chamber (2a) is consistent with the width direction of the device body (2); a through hole 2 (2g) and a through hole 1 (2b) are respectively provided at the left and right ends of the device body (2); the through hole 1 (2b) is provided with a plurality of through holes (2g) and a plurality of through holes (2b). ) and through hole 2 (2g) are both connected to the piston chamber (2a), piston 1 (4a) and piston 2 (5a) are slidably arranged in the piston chamber (2a), piston 1 (4a) is provided with through hole 3 (4b), piston 2 (5a) is provided with through hole 4 (5b), the piston chamber (2a) is filled with magnetorheological fluid, an electromagnet (2f) is provided on the lower side of the device body (2), and a tension spring (13) is provided between the piston 1 (4a) and the piston 2 (5a). ), the piston one (4a) is fixedly connected to a piston rod one (4) on a side away from the piston two (5a), the piston rod one (4) is slidably arranged on the device body (2) through a through hole one (2b), the piston rod one (4) and the device body (2) are sealed, the free end of the piston rod one (4) extends outside the device body (2) and the lower side of the end is provided with a limiting mechanism one capable of preventing the device body (2) from tilting toward the side of the piston rod one (4) when it moves at the top of the pipeline (1), the piston two (5a) is fixedly connected to a piston rod two (5) on a side away from the piston one (4a), the piston rod two (5) is slidably arranged on the device body (2) through a through hole two (2g), the piston rod two (5) and the device body (2) are sealed, the free end of the piston rod two (5) extends outside the device body (2) and the lower side of the end is provided with a limiting mechanism two capable of preventing the device body (2) from tilting toward the side of the piston rod two (5) when it moves at the top of the pipeline (1); The driving device comprises two driving mechanisms, the two driving mechanisms are arranged in parallel at the front and rear ends of the device body (2), the driving mechanism comprises a rotating shaft (6) and two supporting plates (6a), the two supporting plates (6a) are arranged vertically on the lower side of the device body (2), the rotating shaft (6) is rotatably arranged on the two supporting plates (6a), rollers (6b) are fixedly arranged at both ends of the rotating shaft (6), a motor (7) is fixedly arranged on one of the supporting plates (6a), the output shaft of the motor (7) is drivingly connected to the rotating shaft (6), an installation cavity (2c) is arranged in the device body (2), a controller (2d) and a storage battery (2e) are arranged in the installation cavity (2c), and the motor (7) is electrically connected to the storage battery (2e) through the controller (2d); The limiting mechanism comprises a base plate (8), an equipment box (8a), a fixed shaft (9) and a fixed pulley (14); the upper side of the base plate (8) is hinged to the lower side of the piston rod (4) through a hinge; the equipment box (8a) is fixedly mounted on the lower side of the base plate (8); one end of the fixed shaft (9) is fixedly mounted on the lower side of the equipment box (8a); a roller (9a) is rotatably mounted on the other end of the fixed shaft (9); the fixed pulley (14) is fixedly mounted on the lower side of the device body (2); a cylindrical equipment cavity (8b) is arranged in the equipment box (8a); A through hole (8c) is provided on one side of the equipment box (8a) close to the device body (2), and the through hole (8c) is connected to the equipment chamber (8b). A fixing rod (8e) is provided on the axis of the equipment chamber (8b), and a spiral spring (8d) is provided in the equipment chamber (8b). The inner end of the spiral spring (8d) is fixedly connected to the fixing rod (8e), and the outer end of the spiral spring (8d) is fixedly connected to a pull rope (12). The free end of the pull rope (12) passes through the through hole (8c) and extends to the outside of the equipment box (8a), and the end is fixedly connected to the lower side of the device body (2) through a fixed pulley (14).
2. The device for leak detection in oil and gas pipelines according to claim 1, characterized in that: The second limiting mechanism comprises a second base plate (10), a second equipment box (10a), a second fixed shaft (11) and a second fixed pulley (14a). The upper side of the second base plate (10) is hinged to the lower side of the second piston rod (5) through a hinge. The second equipment box (10a) is fixedly arranged on the lower side of the second base plate (10). One end of the second fixed shaft (11) is fixedly arranged on the lower side of the second equipment box (10a). The other end of the second fixed shaft (11) is rotatably provided with a second roller (11a). The second fixed pulley (14a) is fixedly arranged on the lower side of the device body (2). The second equipment box (10a) is provided with a cylindrical equipment cavity (10b). A second through hole (10c) is provided on one side of the box (10a) close to the device body (2), and the second through hole (10c) is connected to the second equipment chamber (10b). A second fixing rod (10e) is provided at the axis of the second equipment chamber (10b). A second spiral spring (10d) is provided in the second equipment chamber (10b), and the inner end of the second spiral spring (10d) is fixedly connected to the second fixing rod (10e). The outer end of the second spiral spring (10d) is fixedly connected to a second pull rope (12a). The free end of the second pull rope (12a) passes through the second through hole (10c) and extends to the outside of the device box (10a), and the end is fixedly connected to the lower side of the device body (2) through a second fixed pulley (14a).
3. The device for leak detection in oil and gas pipelines according to claim 2, characterized in that: The wheel surface of the roller wheel 1 (9a) is provided with an annular groove 1 (9b), and a piezoelectric ceramic plate 1 (9c) is arranged in the annular groove 1 (9b); the wheel surface of the roller wheel 2 (11a) is provided with an annular groove 2 (11b), and a piezoelectric ceramic plate 2 (11c) is arranged in the annular groove 2 (11b); the piezoelectric ceramic plate 1 (9c) and the piezoelectric ceramic plate 2 (11c) are both electrically connected to the battery (2e); when the device body (2) moves on the pipeline (1), the piezoelectric ceramic plate 1 (9c) and the piezoelectric ceramic plate 2 (11c) are always in contact with the outer wall of the pipeline (1); the roller wheel 1 (9a) and the roller wheel 2 (11a) are both made of corrosion-resistant rubber material.
4. The device for leak detection in oil and gas pipelines according to claim 3, characterized in that: A GPS positioning module (15) is provided on the upper side of the device body (2), and the GPS positioning module (15) is electrically connected to the storage battery (2e).
Citation Information
Patent Citations
Pipe damping device
CN108644478A
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CN109100418A
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CN209558050U