Nondestructive testing device for cracks of natural gas pipeline

Abstract

A nondestructive testing device for natural gas pipeline cracks comprises a shell of a round pipe structure, an opening is formed in the bottom of the shell, two sets of supporting rods are arranged on the inner side of the shell, a walking wheel is arranged at the end of each supporting rod, and an arc-shaped mounting frame is arranged on the outer side of the shell. The invention belongs to the technical field of pipeline detection equipment, the shell is clamped on the natural gas pipeline through the opening in the bottom of the shell, so that the detection equipment on the shell can carry out detection operation along with the natural gas pipeline, the detection device is not influenced by field landforms, and even if the natural gas pipeline goes uphill and downhill due to the landforms, the detection efficiency is improved. And the shell can be stably clamped on the natural gas pipeline to carry out nondestructive testing operation.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline detection equipment, and in particular relates to a nondestructive detection device for cracks in a natural gas pipeline. Background Art

[0002] As a clean energy, natural gas has been widely used around the world. As the main mode of natural gas transportation, the safety and reliability of natural gas pipelines are directly related to the stability of energy supply and public safety. However, during the long-term use of natural gas pipelines, due to the influence of geological conditions, material aging, construction defects, external environment and other factors, various damages may occur, among which cracks are the most common and most dangerous.

[0003] The presence of cracks will significantly reduce the strength and pressure bearing capacity of the pipeline, increase the risk of natural gas leakage, and once a leak occurs, it will not only cause a waste of resources, but may also cause serious accidents such as fires and explosions, posing a serious threat to people's lives and property. Therefore, regular and comprehensive crack detection of natural gas pipelines to promptly discover and repair potential safety hazards is a necessary means to ensure the safe operation of the pipeline.

[0004] The patent with the patent announcement number CN118602319B discloses a nondestructive detection device for cracks in a natural gas pipeline, which relates to the technical field of pipeline detection equipment, and includes a bottom plate, two support legs are fixedly connected to the upper side of the bottom plate, the two support legs are used to support the natural gas pipeline, a mounting plate is arranged between the two support legs, a nondestructive detection mechanism for detecting the natural gas pipeline is installed on the top of the mounting plate, and a cleaning mechanism for cleaning the natural gas pipeline is arranged on the bottom plate. The present invention sets a cleaning mechanism, when the traction component drives the two self-locking connecting rings to move, the driving wheel starts to rotate under the action of the friction force on the surface of the natural gas pipeline, and under the drive of the transmission belt, the reciprocating component is driven to operate, and then the detergent in the water tank is extracted, and then the surface of the pipeline is flushed under the action of the pressurized nozzle, and the mud shell impurities on the surface of the pipeline are washed away, so as to ensure the accuracy of the detection result of the ultrasonic detector.

[0005] Although the above technical solution solves the problem that due to the inevitable laying of natural gas pipelines in the wild, a layer of mud crust will form on the surface of the pipeline due to long-term exposure to the sun and rain, and the cracked mud crust will interfere with the detection results of the ultrasonic detection equipment after drying, affecting the accuracy of the detection results, the following problems still exist: since the natural gas pipelines in the wild are set according to the terrain, and the terrain in the wild is uneven, when the natural gas pipeline follows the terrain to go uphill and downhill, especially when the ground is flat but the natural gas pipeline goes uphill and downhill, due to the limitations of the terrain, the existing detection equipment cannot perform non-destructive detection on the upward or downward inclined natural gas pipelines laid in the field. Summary of the invention

[0006] The present invention provides a nondestructive detection device for cracks in a natural gas pipeline. The shell is clamped onto the natural gas pipeline through an opening at the bottom of the shell, so that the detection equipment on the shell can follow the natural gas pipeline to perform detection operations. The detection device is not affected by the field topography. Even if the natural gas pipeline has upslope and downslope conditions due to the terrain, the shell can be stably clamped onto the natural gas pipeline for nondestructive detection operations.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: A nondestructive detection device for cracks in a natural gas pipeline comprises a shell of a circular tube structure, an opening is formed at the bottom of the shell, two groups of support rods are provided on the inner side of the shell, and each support rod has a running wheel at the end, an arc-shaped mounting frame is provided on the outer side of the shell, mounting platforms are provided at both ends of the mounting frame, and a DR imaging machine and a reflective plate are provided on the two mounting platforms respectively; two power supply boxes are provided on the shell, and the power supply boxes provide power to the DR imaging machine.

[0008] The shell is also provided with a detection and adjustment mechanism, which includes a slide rail with a circular structure, a driving screw and two limit rods. An opening is provided at the bottom of the slide rail, and slideways are provided at the two open ends of the slide rail, and retractable connecting plates are respectively provided in the slideways; a flange with an arc structure is provided on the inner side surface of the slide rail, and a threaded hole and two connecting holes are provided on the flange. The driving screw is rotatably set on the shell through a mounting block, and a motor is provided at one end of the driving screw, and the driving screw is threadedly connected to the threaded hole on the flange; two limit rods are arranged on both sides of the driving screw, and the two limit rods are respectively slidably connected to the two connecting holes on the flange; the mounting frame is rotatably set on the slide rail.

[0009] An anti-skid layer is provided on the inner side of the slide rail, a driving motor is provided on the inner side of the two ends of the mounting frame respectively, a driving wheel is provided on the main shaft of the two driving motors, and the two driving wheels are in contact with the anti-skid layer on the inner side of the slide rail for transmission.

[0010] The shell is also provided with a balancing mechanism, which includes two groups of balancing boxes and four connecting pipes. Two balancing boxes form a group, and a group of balancing boxes is respectively provided on both sides of the shell. A connecting pipe is provided between each balancing box, and each connecting pipe is provided with a micro rotor pump. Balancing water is provided in the balancing box.

[0011] Each group of support rods includes a vertical support rod and two horizontal support rods, and the installation position of the vertical support rod and the installation position of the two horizontal support rods are not in the same plane.

[0012] The support rod is an electric push rod, and a hub motor is installed on the walking wheel at the end of the support rod.

[0013] A level sensor is respectively provided on the two power supply boxes of the housing.

[0014] A plurality of safety belts are arranged at the opening position of the bottom of the shell.

[0015] The outer bottom portion of the shell is provided with retractable legs.

[0016] The trim box is a transparent trim box, and a liquid level mark is arranged on the side of the trim box.

[0017] Beneficial effects: By adopting the above technical solution, the beneficial effects of the present invention are as follows: the present invention provides a non-destructive detection device for cracks in a natural gas pipeline, wherein the shell is clamped onto the natural gas pipeline through the opening at the bottom of the shell, so that the detection equipment on the shell can follow the natural gas pipeline for detection operations, and the detection device is not affected by the field topography. Even if the natural gas pipeline has upslope and downslope due to the terrain, the shell can be stably clamped onto the natural gas pipeline for non-destructive detection operations; the two sets of support rods inside the shell can adjust the distance between the shell and the natural gas pipeline, thereby adjusting the distance between the DR imaging equipment and the natural gas pipeline to be consistent; The shell is provided with a balancing mechanism. The controller performs balancing operation on the shell through the parameters fed back by the level sensor. A connecting pipe is provided between each balancing box. Each connecting pipe is provided with a micro rotor pump. The micro rotor pump drives the balancing water to adjust in the two balancing boxes to achieve the leveling operation of the shell in the left and right directions and the front and back directions, so as to avoid the shell from being tilted when it is running on the natural gas pipeline in the wild. Each group of support rods includes a vertical support rod and two horizontal support rods. The installation position of the vertical support rod is not in the same plane as the installation position of the two horizontal support rods. The support rod is an electric push rod. The walking wheel at the end of the support rod is equipped with a hub motor. There is a bulge at the connection of the field natural gas pipeline. The vertical support rod and the two horizontal support rods set at the first three points move forward and when they touch the bulge at the connection of the natural gas pipeline, the two groups of vertical support rods and the two horizontal support rods are controlled to retract respectively when passing through the bulge, so that they can stably and safely pass through the bulge at the connection of the natural gas pipeline; The detection adjustment mechanism is adopted, so that the mounting frame equipped with the DR imaging device can not only follow the movement of the shell to perform non-destructive testing on the natural gas pipeline, but also realize reciprocating movement through the detection adjustment mechanism to perform non-destructive testing on the natural gas pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the present invention is schematically shown Figure 1 ; Figure 2 The structure of the present invention is schematically shown Figure 2 ; Figure 3 The structure of the present invention is schematically shown Figure 3 ; Figure 4 It is a schematic diagram of the structure of the detection and adjustment mechanism and the balancing mechanism in the present invention; Figure 5 It is a schematic diagram of the structure of the mounting frame and the slide rail in the present invention; Figure 6 It is a structural schematic diagram of the slide rail in the present invention; Figure 7 It is a structural schematic diagram of the mounting frame in the present invention; Figure 8 It is a schematic diagram of the structure of the detection device of the present invention when detecting an inclined upward natural gas pipeline; Fig. 9 It is a structural schematic diagram of the detection device of the present invention when detecting a natural gas pipeline inclined downward.

[0019] Shell 1, walking wheel 2, mounting frame 3, mounting platform 4, power box 5, slide rail 6, driving screw 7, limiting rod 8, connecting plate 9, flange 10, threaded hole 11, connecting hole 12, driving motor 13, driving wheel 14, balancing box 15, connecting pipe 16, vertical support rod 17, horizontal support rod 18, horizontal sensor 19, safety belt 20, outrigger 21, DR imaging machine 22, reflective plate 23, natural gas pipeline 24. DETAILED DESCRIPTION

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0022] like Figure 1-Figure 9 As shown, a nondestructive detection device for cracks in a natural gas pipeline includes a shell 1 of a circular tube structure, an opening is provided at the bottom of the shell 1, two groups of support rods are provided on the inner side of the shell 1, and each support rod has a running wheel 2 at its end, and an arc-shaped mounting frame 3 is provided on the outer side of the shell 1, and mounting platforms 4 are provided at both ends of the mounting frame 3, and a DR imaging machine 22 and a reflector 23 are provided on the two mounting platforms 4 respectively; two power supply boxes 5 are provided on the shell 1, and the power supply boxes 5 provide power to the DR imaging machine 22. The two power supply boxes 5 can provide power for all electrical equipment.

[0023] The shell 1 is also provided with a detection and adjustment mechanism, which includes a slide rail 6 with a circular structure, a driving screw 7 and two limit rods 8. An opening is provided at the bottom of the slide rail 6, and slideways are provided at the two open ends of the slide rail 6. Retractable connecting plates 9 are respectively provided in the slideways; a flange 10 with an arc structure is provided on the inner side surface of the slide rail 6, and a threaded hole 11 and two connecting holes 12 are provided on the flange 10. The driving screw 7 is rotatably set on the shell 1 through a mounting block, and a motor is provided at one end of the driving screw 7, and the driving screw 7 is threadedly connected to the threaded hole 11 on the flange 10; two limit rods 8 are arranged on both sides of the driving screw 7, and the two limit rods 8 are respectively slidably connected to the two connecting holes 12 on the flange 10; the mounting frame 3 is rotatably set on the slide rail 6.

[0024] The two limit rods 8 are used to fix and limit the position of the slide rail 6 on the shell 1. A motor is provided at one end of the driving screw 7. When the motor rotates forward or reversely, the driving screw 7 and the threaded hole 11 opened on the flange 10 of the slide rail 6 are transmitted. The driving screw 7 can drive the slide rail 6 to move back and forth on the shell 1, so that the DR imaging equipment on the mounting frame 3 can perform 360° rotation DR imaging detection on the natural gas pipeline 24, and can also perform DR imaging detection on the natural gas pipeline 24 moving back and forth.

[0025] An anti-skid layer is provided on the inner side of the slide rail 6, and a driving motor 13 is provided on the inner side of each of the two ends of the mounting frame 3. A driving wheel 14 is provided on the main shaft of each of the two driving motors 13, and both of the two driving wheels 14 are in contact with the anti-skid layer on the inner side of the slide rail 6 for transmission. The mounting frame 3 rotates by friction on the anti-skid layer through the driving wheels 14 of the two driving motors 13, so that the mounting frame 3 performs forward or reverse rotation on the slide rail 6.

[0026] The shell 1 is also provided with a balancing mechanism, which includes two groups of balancing boxes 15 and four connecting pipes 16. Two balancing boxes 15 form a group. A group of balancing boxes 15 is provided on both sides of the shell 1. A connecting pipe 16 is provided between each balancing box 15. Each connecting pipe 16 is provided with a micro rotor pump. Balancing water is provided in the balancing box 15. The balance of the shell 1 on the field natural gas pipeline is adjusted by the balancing mechanism, so that the shell 1 is always in the center when walking and testing on the field natural gas pipeline. The balancing mechanism can not only adjust the left and right balance of the shell 1, but also adjust the front and back balance of the shell 1. In particular, when the shell 1 walks on the ascending or descending natural gas pipeline, the front and back weight of the shell 1 is adjusted so that the shell 1 can stably perform walking operations.

[0027] The balancing mechanism realizes the pumping and delivery operations between the balancing boxes 15 through the micro-rotor pump arranged on the connecting pipe 16. The capacity of the balancing water between the two balancing boxes 15 with corresponding positions can be adjusted through the micro-rotor pump. When the shell 1 tilts to the left during walking, the staff adjusts the balancing mechanism through the feedback and visual detection of the horizontal sensor 19 through the controller or remote control, and adjusts the balancing water in the balancing box 15 on the left side of the shell 1 to the balancing box 15 on the right side of the shell 1. The shell 1 is restored to a horizontal state by adjusting the weight of the balancing box 15. After the shell 1 is restored to a horizontal state, the weight of the balancing boxes 15 on both sides of the shell 1 is balanced by adjusting through the controller or remote control.

[0028] Each group of support rods includes a vertical support rod 17 and two horizontal support rods 18 , and the installation position of the vertical support rod 17 and the installation position of the two horizontal support rods 18 are not in the same plane.

[0029] The support rod is an electric push rod, and a hub motor is installed on the travel wheel 2 at the end of the support rod. When the housing 1 detects the upward natural gas pipeline 24, its power source is the hub motor installed on the travel wheel 2. According to the operation requirements, one hub motor, two hub motors or multiple hub motors can be installed in the six travel wheels 2 to meet the requirements of the travel wheel 2 driving the housing 1 to travel on the natural gas pipeline 24.

[0030] A level sensor 19 is provided on each of the two power supply boxes 5 of the housing 1. The level sensor 19 can timely feedback the operating posture of the housing 1 to the staff, so that the staff can adjust the operating posture of the housing 1 on the natural gas pipeline through a controller or a remote controller.

[0031] A plurality of safety belts 20 are provided at the opening position at the bottom of the housing 1. The safety belts 20 can protect the housing 1 from falling off the natural gas pipeline.

[0032] The outer bottom of the housing 1 is provided with retractable legs 21. When the housing 1 is not used for inspection, the legs 21 are opened to allow the housing 1 to be stably placed on the ground. When the inspection is carried out, the legs 21 are retracted.

[0033] The trim box 15 is a transparent trim box, and the side of the trim box 15 is provided with a liquid level mark line. It is convenient for the staff to add or adjust the weight of the counterweight water in the trim box 15 in time. Example

[0034] When in use, open the safety belt 20 at the bottom opening of the housing 1, lift the housing 1 to the natural gas pipeline 24 in the field, buckle the safety belt 20, pull out the two retractable connecting plates 9 at the bottom of the slide rail 6, so that the slide rail 6 becomes a closed circular track, and control the support rods to retract through the controller so that all the support rods are at the same length, ensuring that when the mounting frame 3 rotates on the slide rail 6, the distance between the DR imaging device and the natural gas pipeline 24 is consistent; A hub motor is installed on the traveling wheel 2, and the hub motor drives the traveling wheel 2 to rotate, so that the shell 1 moves on the natural gas pipeline 24 at a uniform and stable speed. The shell 1 moves stably on the natural gas pipeline 24, and the mounting frame 3 performs forward and reverse operations rhythmically on the slide rail 6, so that the DR imaging equipment continuously performs 360-degree DR imaging detection operations on the natural gas pipeline 24, which can effectively detect whether cracks appear in the natural gas pipeline 24.

[0035] The shell 1 always keeps parallel with the natural gas pipeline 24 and is not affected by the outdoor topography, nor is it restricted by the upward and downward posture of the natural gas pipeline 24 due to the topography.

[0036] The controller used in the present invention is also called a programmable logic controller (PLC), which is a digital operation electronic system specially designed for use in industrial environments. It uses a programmable memory to store instructions for performing operations such as logical operations, sequential control, timing, counting and arithmetic operations, and controls various types of mechanical equipment or production processes through digital or analog input and output. It is an existing conventional technology and its structural features are not described in detail. The staff can use a controller or a remote controller to control various electrical components to perform various actions.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nondestructive detection device for cracks in a natural gas pipeline, characterized in that: It includes a shell of a circular tube structure, with an opening at the bottom of the shell, two groups of support rods are arranged on the inner side of the shell, and each support rod has a walking wheel at the end, and an arc-shaped mounting frame is arranged on the outer side of the shell, and mounting platforms are respectively arranged at both ends of the mounting frame, and a DR imaging machine and a reflective plate are respectively arranged on the two mounting platforms; two power boxes are arranged on the shell, and the power boxes provide power to the DR imaging machine.

2. The nondestructive detection device for cracks in a natural gas pipeline according to claim 1 is characterized in that: The shell is also provided with a detection and adjustment mechanism, which includes a slide rail with a circular structure, a driving screw and two limit rods. An opening is provided at the bottom of the slide rail, and slideways are provided at the two open ends of the slide rail, and retractable connecting plates are respectively provided in the slideways; a flange with an arc structure is provided on the inner side surface of the slide rail, and a threaded hole and two connecting holes are provided on the flange. The driving screw is rotatably set on the shell through a mounting block, and a motor is provided at one end of the driving screw, and the driving screw is threadedly connected to the threaded hole on the flange; two limit rods are arranged on both sides of the driving screw, and the two limit rods are respectively slidably connected to the two connecting holes on the flange; the mounting frame is rotatably set on the slide rail.

3. The nondestructive detection device for cracks in a natural gas pipeline according to claim 2 is characterized in that: An anti-skid layer is provided on the inner side of the slide rail, a driving motor is provided on the inner side of the two ends of the mounting frame respectively, a driving wheel is provided on the main shaft of the two driving motors, and the two driving wheels are in contact with the anti-skid layer on the inner side of the slide rail for transmission.

4. The nondestructive detection device for cracks in a natural gas pipeline according to claim 3 is characterized in that: The shell is also provided with a balancing mechanism, which includes two groups of balancing boxes and four connecting pipes. Two balancing boxes form a group, and a group of balancing boxes is respectively provided on both sides of the shell. A connecting pipe is provided between each balancing box, and each connecting pipe is provided with a micro rotor pump. Balancing water is provided in the balancing box.

5. The nondestructive detection device for cracks in a natural gas pipeline according to claim 4 is characterized in that: Each group of support rods includes a vertical support rod and two horizontal support rods, and the installation position of the vertical support rod and the installation position of the two horizontal support rods are not in the same plane.

6. The nondestructive detection device for cracks in a natural gas pipeline according to claim 5, characterized in that: The support rod is an electric push rod, and a hub motor is installed on the walking wheel at the end of the support rod.

7. A nondestructive detection device for cracks in a natural gas pipeline according to claim 6, characterized in that: A level sensor is respectively provided on the two power supply boxes of the housing.

8. The nondestructive detection device for cracks in a natural gas pipeline according to claim 7, characterized in that: A plurality of safety belts are arranged at the opening position of the bottom of the shell.

9. A nondestructive detection device for cracks in a natural gas pipeline according to claim 8, characterized in that: The outer bottom portion of the shell is provided with retractable legs.

10. A nondestructive detection device for cracks in a natural gas pipeline according to claim 9, characterized in that: The trim box is a transparent trim box, and a liquid level mark is arranged on the side of the trim box.

Images