Gas pipeline sealing detection device

Abstract

The present invention provides a gas pipeline sealing detection device, which belongs to the technical field of gas pipeline detection, and includes a first semicircular shell, a second semicircular shell, a pressure detector, a flexible gas storage component, an air pumping component and a displacement limiting component. The first semicircular shell and the second semicircular shell are relatively distributed and closed into a cylindrical body outside the gas pipeline. The flexible gas storage component is arranged at both ends of the first semicircular shell and the second semicircular shell, and the air pumping component is installed on the outer wall of the first semicircular shell. The air pumping component is used to pump air to the flexible gas storage component. Compared with the prior art, the embodiment of the present invention can realize online gas leakage detection of the gas pipeline without disassembling the gas pipeline, and the gas leakage detection for the gas pipeline is a segmented detection, which can greatly reduce the volume of the detection device and improve the detection effect.

Description

Technical Field

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

[0002] In order to prevent the gas pipeline from being damaged by external force or corrosion, which may cause gas leakage, it is necessary to inspect the gas pipeline regularly to prevent safety accidents.

[0003] At present, gas pipeline leakage detection mostly uses a sealing structure to seal both ends of the gas pipeline, then injects air into the sealed gas pipeline, and then sinks the gas pipeline into the water body. By observing whether bubbles are generated in the water body, it is determined whether there is a gas pipeline leakage. This detection method is relatively traditional. On the one hand, the gas pipeline in the installation state needs to be disassembled from the corresponding position during detection, and online gas pipeline leakage detection cannot be achieved, resulting in a cumbersome detection process. On the other hand, due to the long length of the gas pipeline, the corresponding sealing structure for sealing both ends of the gas pipeline is far away, resulting in a large volume of the entire detection device. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a gas pipeline sealing detection device.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A gas pipeline sealing detection device comprises a first semicircular shell, a second semicircular shell, a pressure detector, a flexible gas storage component, a gas pumping component and a displacement limiting component.

[0007] The first semicircular shell and the second semicircular shell are arranged opposite to each other and closed into a cylindrical body outside the gas pipeline.

[0008] The flexible gas storage assembly is arranged at both ends of the first semicircular shell and the second semicircular shell.

[0009] The air pumping assembly is mounted on the outer wall of the first semicircular shell, and is used to pump air to the flexible air storage assembly.

[0010] When the air pumping component delivers air to the flexible gas storage component, the flexible gas storage component expands to seal the contact position between the cylindrical body and the gas pipeline.

[0011] When the air pumping component extracts the air inside the flexible gas storage component, the flexible gas storage component collapses to release the sealing state between the cylindrical body and the gas pipeline.

[0012] The pressure detector is installed outside the first semicircular shell. When the flexible gas storage assembly expands to seal the contact position between the cylindrical body and the gas pipeline, the pressure detector is used to detect the internal pressure of the cylindrical body.

[0013] The displacement limiting assembly is arranged inside the second semicircular shell, and is used to limit the movement of the cylindrical body along the outside of the gas pipeline to an appropriate distance.

[0014] As a further improvement of the present invention: the first semicircular shell is hingedly connected to the second semicircular shell, a first extension plate is fixedly arranged on one side of the first semicircular shell, a second extension plate corresponding to the first extension plate is fixedly arranged on one side of the second semicircular shell, and the first extension plate and the second extension plate are connected by a bolt and nut assembly.

[0015] The flexible air storage assembly includes four groups of semicircular support plates and four groups of semicircular air bags.

[0016] The four groups of semicircular support plates are distributed opposite to each other in pairs, wherein two groups of the relative semicircular support plates are respectively fixedly arranged at one end of the first semicircular shell and the second semicircular shell, and the other two groups of the relative semicircular support plates are respectively fixedly arranged at the other end of the first semicircular shell and the second semicircular shell, and the four groups of semicircular airbags are respectively arranged on the inner sides of the four groups of semicircular support plates.

[0017] As a further improvement of the present invention: the gas pumping assembly includes a gas storage cylinder, a hard pipe, a hose and a piston block,

[0018] The gas cylinder is fixedly arranged on the outer wall of the first semicircular shell, the piston block is movably arranged inside the gas cylinder, a guide rail groove is opened on the side wall of the piston block, and a second guide rail matched with the guide rail groove is fixedly arranged on the inner wall of the gas cylinder along the length direction, a threaded sleeve is fixedly arranged at one end of the piston block, and a screw rod is matched with the inner thread of the threaded sleeve, and one end of the screw rod extends to the outside of the gas cylinder and is connected to a handle.

[0019] The hard tubes are provided with two groups, one end of the two groups of hard tubes is connected to the air storage cylinder, and the other end is respectively connected to two groups of soft tubes, and the four groups of soft tubes are respectively connected to the four groups of semicircular air bags.

[0020] As a further improvement of the present invention: a power supply and an indicator light are fixedly mounted on the outer wall of one end of the second semicircular shell, and two conductive rods are fixedly mounted on the inner wall of one end of the second semicircular shell.

[0021] The displacement limiting assembly includes a support rod, a conductive sheet, a first elastic member, a second elastic member and a sliding seat.

[0022] The slide seat is arranged on the inner wall of the second semicircular shell and can slide along the length direction of the second semicircular shell. One end of the second elastic member is connected to the inner wall of the second semicircular shell, and the other end is connected to the slide seat, so as to provide elastic tension to the slide seat.

[0023] The support rod is hingedly arranged on one side of the sliding seat, one end of the first elastic member is connected to the sliding seat, and the other end is connected to the support rod, which is used to provide elastic support for the support rod so that the end of the support rod away from the sliding seat is against the outer wall of the gas pipeline, and the conductive sheet is installed on the side wall of the support rod.

[0024] As a further improvement of the present invention: a first guide rail is fixedly provided on the inner wall of the second semicircular shell along the length direction, and the slide seat is slidably matched with the first guide rail.

[0025] As a further improvement of the present invention: a damping rod is further provided on one side of the slide seat, and the damping rod is in close contact with the side wall of the support rod.

[0026] As a further improvement of the present invention: a plurality of L-shaped support rods are fixedly provided at both ends of the first semicircular shell and the second semicircular shell, and the plurality of L-shaped support rods extend toward the direction of the gas pipeline. A sphere is movably embedded at the end of each group of the L-shaped support rods, and the sphere is in contact with the outer wall of the gas pipeline.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] In the embodiment of the present invention, when it is necessary to detect gas leakage in the gas pipeline, the first semicircular shell and the second semicircular shell can be closed into a cylindrical body outside the gas pipeline, and then air is sent to the flexible gas storage component by using the air pumping component, thereby driving the flexible gas storage component to expand and tighten the contact position between the cylindrical body and the gas pipeline to achieve the sealing of the cylindrical body. At this time, the pressure detector is observed. If the pressure detector detects that the internal pressure of the cylindrical body increases, it indicates that there is a gas leakage in the current gas pipeline section located inside the cylindrical body. On the contrary, if the pressure detector fails to detect the change in the internal pressure of the cylindrical body, it indicates that there is no gas leakage in the current gas pipeline section located inside the cylindrical body. After the detection of the current gas pipeline section is completed, the air pumping component extracts the air inside the flexible gas storage component, causing the flexible gas storage component to collapse, thereby releasing the sealing state of the cylindrical body and the gas pipeline, and then the cylinder is moved along the length direction of the gas pipeline. When the cylindrical body is removed from the outside of the current pipe section, air is again sent into the flexible gas storage component through the air pumping component, so that the flexible gas storage component expands again, the cylindrical body is sealed again, and the gas pipeline in the cylindrical body is re-detected by using the pressure detector..., and such a reciprocating cycle can be used to perform section-by-section detection on a longer gas pipeline; when the cylindrical body moves along the outside of the gas pipeline, the displacement limiting component can be used to limit the moving distance of the cylindrical body, so that the cylindrical body moves an appropriate distance, thereby preventing the cylindrical body from moving too long and causing some sections of the gas pipeline to be missed, and at the same time preventing the cylindrical body from moving too short a distance, avoiding repeated detection of some sections of the gas pipeline. Compared with the prior art, the online gas leakage detection of the gas pipeline can be realized without disassembling the gas pipeline, and the gas leakage detection of the gas pipeline is a section-by-section detection, which can greatly reduce the volume of the detection device and improve the detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a gas pipeline sealing detection device Figure 1 ;

[0030] Figure 2 A schematic diagram of the structure of a gas pipeline sealing detection device Figure 2 ;

[0031] Figure 3 A schematic diagram of the structure of a gas pipeline sealing detection device Figure 3 ;

[0032] Figure 4 for Figure 1 A magnified schematic diagram of the middle A area;

[0033] Figure 5 for Figure 2 A magnified schematic diagram of the middle B area;

[0034] Figure 6 for Figure 3 Enlarged schematic diagram of the middle C area;

[0035] Figure 7 for Figure 3 The enlarged schematic diagram of the D area in the middle;

[0036] In the figure: 10-first semicircular shell, 101-first extension plate, 20-second semicircular shell, 201-second extension plate, 202-first guide rail, 203-power supply, 204-indicator light, 205-conductive rod, 30-pressure detector, 40-flexible gas storage component, 401-semicircular support plate, 402-semicircular air bag, 50-pumping gas component, 501-gas storage cylinder, 502-hard tube, 503-hose, 504-handle, 505-screw, 506-second guide rail, 507-threaded sleeve, 508-piston block, 60-L-shaped support rod, 601-sphere, 70-displacement limiting component, 701-support rod, 702-conductive sheet, 703-first elastic member, 704-second elastic member, 705-slide seat, 706-damping rod. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] See also Figure 1 , Figure 2 as well as Figure 3The present embodiment provides a gas pipeline sealing detection device, including a first semicircular shell 10, a second semicircular shell 20, a pressure detector 30, a flexible gas storage component 40, a pumping gas component 50 and a displacement limiting component 70. The first semicircular shell 10 and the second semicircular shell 20 are relatively distributed and closed into a cylindrical body outside the gas pipeline. The flexible gas storage component 40 is arranged at both ends of the first semicircular shell 10 and the second semicircular shell 20. The pumping gas component 50 is installed on the outer wall of the first semicircular shell 10. The pumping gas component 50 is used to pump air to the flexible gas storage component 40. When the pumping gas component 50 sends air to the flexible gas storage component 40, When the gas is supplied from the flexible gas storage component 40, the flexible gas storage component 40 expands to seal the contact position between the cylindrical body and the gas pipeline. When the gas pumping component 50 extracts the air inside the flexible gas storage component 40, the flexible gas storage component 40 collapses to release the sealing state between the cylindrical body and the gas pipeline. The pressure detector 30 is installed on the outside of the first semicircular shell 10. When the flexible gas storage component 40 expands to seal the contact position between the cylindrical body and the gas pipeline, the pressure detector 30 is used to detect the internal pressure of the cylindrical body. The displacement limiting component 70 is arranged inside the second semicircular shell 20, and is used to limit the movement of the cylindrical body along the outside of the gas pipeline to an appropriate distance.

[0040] When it is necessary to detect gas leaks on the gas pipeline, the first semicircular shell 10 and the second semicircular shell 20 can be closed into a cylindrical body outside the gas pipeline, and then the air pumping component 50 is used to send air to the flexible gas storage component 40, thereby driving the flexible gas storage component 40 to expand and tighten the contact position between the cylindrical body and the gas pipeline to achieve the sealing of the cylindrical body. At this time, the pressure detector 30 is observed. If the pressure detector 30 detects an increase in the internal pressure of the cylindrical body, it indicates that there is a gas leak in the current gas pipeline section located inside the cylindrical body. On the contrary, if the pressure detector 30 fails to detect a change in the internal pressure of the cylindrical body, it indicates that there is no gas leak in the current gas pipeline section located inside the cylindrical body. After the detection of the current gas pipeline section is completed, the air pumping component 50 extracts the air inside the flexible gas storage component 40, causing the flexible gas storage component 40 to collapse, thereby releasing the sealing between the cylindrical body and the gas pipeline. state, and then move the cylindrical body along the length direction of the gas pipeline. When the cylindrical body is removed from the outside of the current pipe section, air is again sent into the flexible gas storage component 40 through the air pumping component 50, so that the flexible gas storage component 40 expands again, and the cylindrical body is sealed again. The gas pipeline in the cylindrical body is re-detected by the pressure detector 30..., and such a reciprocating cycle can be used to perform section-by-section detection on a longer gas pipeline; when the cylindrical body moves along the outside of the gas pipeline, the displacement limiting component 70 can be used to limit the moving distance of the cylindrical body, so that the cylindrical body moves an appropriate distance, thereby preventing the cylindrical body from moving too long and causing some sections of the gas pipeline to be missed, and at the same time preventing the cylindrical body from moving too short a distance, avoiding repeated detection of some sections of the gas pipeline. The above-mentioned appropriate distance is determined according to the length of the cylindrical body. For example, when the length of the cylindrical body is 50 cm, the appropriate distance can be 45 cm.

[0041] See also Figure 1 In one embodiment, the first semicircular shell 10 is hingedly connected to the second semicircular shell 20, a first extension plate 101 is fixedly provided on one side of the first semicircular shell 10, and a second extension plate 201 corresponding to the first extension plate 101 is fixedly provided on one side of the second semicircular shell 20, and the first extension plate 101 and the second extension plate 201 are connected by a bolt and nut assembly, and the flexible air storage assembly 40 includes four groups of semicircular support plates 401 and four groups of semicircular airbags 402, and the four groups of semicircular support plates 401 are distributed opposite to each other in pairs, wherein two groups of the relative semicircular support plates 401 are respectively fixedly provided at one end of the first semicircular shell 10 and the second semicircular shell 20, and the other two groups of the relative semicircular support plates 401 are respectively fixedly provided at the other end of the first semicircular shell 10 and the second semicircular shell 20, and the four groups of semicircular airbags 402 are respectively provided on the inner sides of the four groups of semicircular support plates 401.

[0042] When it is necessary to detect gas leakage on the gas pipeline, the first semicircular shell 10 and the second semicircular shell 20 can be clamped on the outside of the gas pipeline, and then the first extension plate 101 and the second extension plate 201 can be locked using a bolt and nut assembly, so that the first semicircular shell 10 and the second semicircular shell 20 are closed into a cylindrical body outside the gas pipeline. At this time, the two groups of semicircular support plates 401 located at one end of the first semicircular shell 10 and the second semicircular shell 20 are closed into an annular structure outside the gas pipeline, and the two groups of semicircular support plates 401 located at the other end of the first semicircular shell 10 and the second semicircular shell 20 are also closed into an annular structure outside the gas pipeline.

[0043] See also Figure 1 as well as Figure 4 In one embodiment, the gas pumping assembly 50 includes an air cylinder 501, a hard tube 502, a hose 503 and a piston block 508. The air cylinder 501 is fixedly arranged on the outer wall of the first semicircular shell 10, and the piston block 508 is movably arranged inside the air cylinder 501. A guide rail groove is opened on the side wall of the piston block 508. A second guide rail 506 adapted to the guide rail groove is fixedly arranged on the inner wall of the air cylinder 501 along the length direction. A threaded sleeve 507 is fixedly arranged at one end of the piston block 508. The internal thread of the threaded sleeve 507 is matched with a screw 505. One end of the screw 505 extends to the outside of the air cylinder 501 and is connected to a handle 504. The hard tube 502 is provided with two groups. One end of the two groups of hard tubes 502 is connected to the air cylinder 501, and the other end is respectively connected to two groups of hoses 503. The four groups of hoses are respectively connected to the four groups of semicircular air bags 402.

[0044] When the first semicircular shell 10 and the second semicircular shell 20 are closed into a cylindrical body outside the gas pipeline 2, the staff can rotate the handle 504 to drive the screw 505 to rotate. When the screw 505 rotates, it cooperates with the thread of the threaded sleeve 507 to drive the piston block 508 to move along the inside of the gas storage cylinder 501, and then the air inside the gas storage cylinder 501 is pressed into the inside of the four groups of semicircular air bags 402 through the two groups of hard tubes 502 and the four groups of soft tubes 503. After the air enters the four groups of semicircular air bags 402, it can drive the four groups of semicircular air bags 402 to expand, thereby tightening the outer wall of the gas pipeline and realizing the sealing of the inside of the cylindrical body. After the inside of the cylindrical body is sealed, if there is no gas leakage in the gas pipeline section currently located inside the cylindrical body, the pressure inside the cylindrical body will not change. On the contrary, if there is a gas leak in the gas pipeline section currently located inside the cylindrical body, the leaked gas can drive the internal pressure of the cylindrical body to increase, and then be detected by the pressure detector 30; after the detection of the current gas pipeline section is completed, the staff rotates the handle 504 in the opposite direction, thereby driving the screw 505 to rotate in the opposite direction, and through the reverse thread cooperation of the screw 505 and the threaded sleeve 507, the piston block 508 is driven to move in the opposite direction along the inside of the gas storage cylinder 501, so as to draw the air inside the four groups of semicircular air bags 402 into the inside of the gas storage cylinder 501 through the four groups of hoses 503 and the two groups of hard tubes 502, so that the four groups of semicircular air bags 402 are collapsed, thereby releasing the sealing state of the cylindrical body, and then the staff moves the cylindrical body along the length direction of the gas pipeline, and then detects the next section of the gas pipeline again.

[0045] See also Figure 2 , Figure 5 , Figure 6 as well as Figure 7 In one embodiment, a power source 203 and an indicator light 204 are fixedly mounted on the outer wall of one end of the second semicircular shell 20, two conductive rods 205 are fixedly mounted on the inner wall of one end of the second semicircular shell 20, and the displacement limiting assembly 70 includes a support rod 701, a conductive sheet 702, a first elastic member 703, a second elastic member 704 and a slide seat 705, wherein the slide seat 705 is arranged on the inner wall of the second semicircular shell 20 and can slide along the length direction of the second semicircular shell 20, and the second elastic member 704 One end is connected to the inner wall of the second semicircular shell 20, and the other end is connected to the slide 705, and is used to provide elastic pulling force to the slide 705. The support rod 701 is hingedly arranged on one side of the slide 705. One end of the first elastic member 703 is connected to the slide 705, and the other end is connected to the support rod 701, and is used to provide elastic support to the support rod 701, so that the end of the support rod 701 away from the slide 705 is against the outer wall of the gas pipeline, and the conductive sheet 702 is installed on the side wall of the support rod 701.

[0046] Initially, the support rod 701 is located at one end of the second semicircular shell 20 away from the power source 203. When the cylindrical body composed of the first semicircular shell 10 and the second semicircular shell 20 is moved along the length direction of the gas pipeline, the support rod 701 is supported by the first elastic member 703, and the end of the support rod 701 away from the slide seat 705 abuts against the outer wall of the gas pipeline. The support rod 701 is subjected to the friction of the gas pipeline and then drives the slide seat 705 to slide along the inner wall of the second semicircular shell 20 and gradually approaches the two conductive rods 205. When the conductive sheet 702 on the side wall of the support rod 701 contacts the two conductive rods 205, the power source 203 can supply power to the indicator light 204 through the two conductive rods 205 and the conductive sheet 702, and the indicator light 204 supplies power. When the light comes on, the staff can judge that the cylindrical body has moved an appropriate distance with the help of the lighting status of the indicator light 204. When the indicator light 204 comes on, the staff can stop moving the cylindrical body and then turn the handle 504 to pressurize the air into the four groups of semicircular airbags 402 to achieve the sealing of the cylindrical body; when the two conductive rods 205 act on the conductive sheet 702, the support rod 701 can be pushed to make the support rod 701 rotate relative to the slide seat 705. When the support rod 701 rotates, the end thereof away from the slide seat 705 is separated from the outer wall of the gas pipeline, and then the second elastic member 704 can pull the slide seat 705 to make the slide seat 705 slide in the opposite direction along the inner wall of the second semicircular shell 20, thereby driving the support rod 701 to move in the opposite direction, thereby achieving the resetting of the support rod 701.

[0047] See also Figure 6 In one embodiment, a first guide rail 202 is fixedly provided on the inner wall of the second semicircular shell 20 along the length direction, and the slide seat 705 is slidably matched with the first guide rail 202 .

[0048] See also Figure 6 In one embodiment, a damping rod 706 is further provided on one side of the slide seat 705 , and the damping rod 706 is in close contact with the side wall of the support rod 701 .

[0049] When the support rod 701 rotates relative to the slide 705 and the end of the support rod 701 away from the slide 705 is separated from the outer wall of the gas pipeline, the friction damping effect of the damping rod 706 on the support rod 701 enables the support rod 701 to temporarily overcome the elastic supporting effect of the first elastic member 703 and then slowly rotate in the opposite direction relative to the slide 705, so that the support rod 701 does not contact the outer wall of the gas pipeline during the reverse movement with the slide 705, thereby ensuring that the support rod 701 can smoothly move in the opposite direction to the initial position.

[0050] See also Figure 1 as well as Figure 7In one embodiment, a plurality of L-shaped support rods 60 are fixedly provided at both ends of the first semicircular shell 10 and the second semicircular shell 20, and the plurality of L-shaped support rods 60 extend toward the direction of the gas pipeline. A sphere 601 is movably embedded at the end of each group of the L-shaped support rods 60, and the sphere 601 contacts the outer wall of the gas pipeline.

[0051] When the first semicircular shell 10 and the second semicircular shell 20 are moved along the length direction of the gas pipeline, the balls 601 at the ends of the L-shaped support rods 60 can roll along the outer wall of the gas pipeline, thereby providing a guiding effect on the movement of the first semicircular shell 10 and the second semicircular shell 20, thereby improving the stability of the first semicircular shell 10 and the second semicircular shell 20 during movement.

[0052] In one embodiment, the first elastic member 703 and the second elastic member 704 may be springs or metal springs, which are not limited here.

[0053] In one embodiment, the pressure detector 30 may be a pressure gauge, or other instruments capable of detecting pressure changes, which is not limited here.

[0054] In one embodiment, the damping rod 706 may be a rubber rod or a plastic rod, which is not limited here.

[0055] In the embodiment of the present invention, when it is necessary to detect gas leakage in the gas pipeline, the first semicircular shell 10 and the second semicircular shell 20 can be closed into a cylindrical body outside the gas pipeline, and then the air pumping component 50 is used to send air into the flexible gas storage component 40, thereby driving the flexible gas storage component 40 to expand and tighten the contact position between the cylindrical body and the gas pipeline to achieve the sealing of the cylindrical body. At this time, the pressure detector 30 is observed. If the pressure detector 30 detects that the internal pressure of the cylindrical body increases, it indicates that there is a gas leakage at the current gas pipeline section located inside the cylindrical body. On the contrary, if the pressure detector 30 fails to detect the change in the internal pressure of the cylindrical body, it indicates that there is no gas leakage at the current gas pipeline section located inside the cylindrical body. After the detection of the current gas pipeline section is completed, the air pumping component 50 extracts the air inside the flexible gas storage component 40, causing the flexible gas storage component 40 to collapse, thereby releasing the sealing state of the cylindrical body and the gas pipeline, and then the gas pipeline is connected along the length of the gas pipeline. The cylindrical body is moved in the direction of degrees. When the cylindrical body is removed from the outside of the current pipe section, air is again sent into the flexible gas storage component 40 through the air pumping component 50, so that the flexible gas storage component 40 expands again, and the cylindrical body is sealed again. The gas pipeline in the cylindrical body is detected again by using the pressure detector 30..., and such a reciprocating cycle can be used to perform section-by-section detection on a longer gas pipeline; when the cylindrical body moves along the outside of the gas pipeline, the displacement limiting component 70 can be used to limit the moving distance of the cylindrical body, so that the cylindrical body moves an appropriate distance, thereby preventing the cylindrical body from moving too long to cause some sections of the gas pipeline to be missed, and at the same time preventing the cylindrical body from moving too short to avoid repeated detection of some sections of the gas pipeline. Compared with the prior art, the online gas leakage detection of the gas pipeline can be realized without disassembling the gas pipeline, and the gas leakage detection of the gas pipeline is a section-by-section detection, which can greatly reduce the volume of the detection device and improve the detection effect.

[0056] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A gas pipeline sealing detection device, characterized in that: It includes a first semicircular shell, a second semicircular shell, a pressure detector, a flexible gas storage component, a gas pumping component and a displacement limiting component. The first semicircular shell and the second semicircular shell are arranged opposite to each other and closed into a cylindrical body outside the gas pipeline. The flexible gas storage assembly is arranged at both ends of the first semicircular shell and the second semicircular shell. The air pumping assembly is mounted on the outer wall of the first semicircular shell, and is used to pump air to the flexible air storage assembly. When the air pumping component delivers air to the flexible gas storage component, the flexible gas storage component expands to seal the contact position between the cylindrical body and the gas pipeline. When the air pumping component extracts the air inside the flexible gas storage component, the flexible gas storage component collapses to release the sealing state between the cylindrical body and the gas pipeline. The pressure detector is installed outside the first semicircular shell. When the flexible gas storage assembly expands to seal the contact position between the cylindrical body and the gas pipeline, the pressure detector is used to detect the internal pressure of the cylindrical body. The displacement limiting assembly is arranged inside the second semicircular shell and is used to limit the movement of the cylindrical body along the outside of the gas pipeline to an appropriate distance. A power supply and an indicator light are fixedly mounted on the outer wall of one end of the second semicircular shell, and two conductive rods are fixedly mounted on the inner wall of one end of the second semicircular shell. The displacement limiting assembly includes a support rod, a conductive sheet, a first elastic member, a second elastic member and a sliding seat. The slide seat is arranged on the inner wall of the second semicircular shell and can slide along the length direction of the second semicircular shell. One end of the second elastic member is connected to the inner wall of the second semicircular shell, and the other end is connected to the slide seat, so as to provide elastic tension to the slide seat. The support rod is hingedly arranged on one side of the slide seat, one end of the first elastic member is connected to the slide seat, and the other end is connected to the support rod, which is used to provide elastic support for the support rod so that the end of the support rod away from the slide seat abuts against the outer wall of the gas pipeline, and the conductive sheet is installed on the side wall of the support rod. A damping rod is also arranged on one side of the slide seat, and the damping rod is in close contact with the side wall of the support rod.

2. A gas pipeline sealing detection device according to claim 1, characterized in that: The first semicircular shell is hingedly connected to the second semicircular shell, a first extension plate is fixedly arranged on one side of the first semicircular shell, a second extension plate corresponding to the first extension plate is fixedly arranged on one side of the second semicircular shell, and the first extension plate and the second extension plate are connected by a bolt and nut assembly. The flexible air storage assembly includes four groups of semicircular support plates and four groups of semicircular air bags. The four groups of semicircular support plates are distributed opposite to each other in pairs, wherein two groups of the relative semicircular support plates are respectively fixedly arranged at one end of the first semicircular shell and the second semicircular shell, and the other two groups of the relative semicircular support plates are respectively fixedly arranged at the other end of the first semicircular shell and the second semicircular shell, and the four groups of semicircular airbags are respectively arranged on the inner sides of the four groups of semicircular support plates.

3. A gas pipeline sealing detection device according to claim 2, characterized in that: The gas pumping assembly includes a gas storage cylinder, a hard pipe, a hose and a piston block. The gas cylinder is fixedly arranged on the outer wall of the first semicircular shell, the piston block is movably arranged inside the gas cylinder, a guide rail groove is opened on the side wall of the piston block, and a second guide rail matched with the guide rail groove is fixedly arranged on the inner wall of the gas cylinder along the length direction, a threaded sleeve is fixedly arranged at one end of the piston block, and a screw rod is matched with the inner thread of the threaded sleeve, and one end of the screw rod extends to the outside of the gas cylinder and is connected to a handle. The hard tubes are provided with two groups, one end of the two groups of hard tubes is connected to the air storage cylinder, and the other end is respectively connected to two groups of soft tubes, and the four groups of soft tubes are respectively connected to the four groups of semicircular air bags.

4. A gas pipeline sealing detection device according to claim 1, characterized in that: A first guide rail is fixedly arranged on the inner wall of the second semicircular shell along the length direction, and the slide seat is slidably matched with the first guide rail.

5. A gas pipeline sealing detection device according to claim 1, characterized in that: A plurality of L-shaped support rods are fixedly provided at both ends of the first semicircular shell and the second semicircular shell, and the plurality of L-shaped support rods extend toward the gas pipeline. A sphere is movably embedded at the end of each group of L-shaped support rods, and the sphere contacts the outer wall of the gas pipeline.

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