A gas pipeline leak detection device

Abstract

The application discloses a kind of gas pipeline leakage detection devices, it is related to gas leakage detection related field, including positioning frame, propelling assembly is installed on the positioning frame, two bidirectional screws are rotatably installed on the side of the positioning frame by first support arm, transmission connection is between two bidirectional screws, two mirror image settings arc detection pieces, two threaded transmission parts are fixed symmetrically on the arc detection piece, the threaded transmission part is set on the bidirectional screw and is threadedly matched with the bidirectional screw, the way of automatic intermittent detection is carried out to pipeline detection, improve the degree of automation while solving the problem that the arm of staff handheld detection cavity appears arm sore, and relative to artificial detection, since the application will clean the outer wall of pipeline before detection, remove dust and soil on the outer wall of pipeline, expose the leakage part of pipeline, and improve the quality of investigation to a certain extent.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas leakage detection, in particular to a gas pipeline leakage detection device. BACKGROUND

[0002] Gas leakage can cause poisoning, explosion, fire and other consequences. Experts point out that there are three conditions for gas explosion, one is that the gas concentration is within the explosion range, two is the limited space, and three is the existence of ignition source, only when the three conditions are met, explosion will occur.

[0003] With the progress of the times and the continuous development of science, some newly built communities will lay gas pipelines to provide more comfortable living environment for owners;

[0004] In the laying of gas pipelines, in order to ensure that the pipeline will not leak after the equipment is completed, the overall pipeline will be detected during the laying process. The laying detection process is to determine the pipeline route, to seal and connect the pipeline, to detect the pipeline, and to fix the position of the pipeline. The process of detecting the pipeline is one step before fixing the position of the pipeline. The purpose is that if the pipeline is fixed and positioned and then detected, if the pipeline is found to leak, the fixing part needs to be removed, which increases the construction time;

[0005] Among them, the staff handholds the detection equipment during detection, walks along the gas pipeline, and detects the gas leakage of the gas pipeline. Since the gas pipeline is usually long, the staff needs to continuously handhold the detection equipment for a long time. This method has relatively low automation degree, and the detection efficiency and quality are lacking. Moreover, it will cause the staff's arm to ache, which will greatly affect the detection quality, such as missing some parts of the pipeline, and some high-level pipelines may have certain risks during detection. To this end, a gas pipeline leakage detection device is provided. SUMMARY

[0006] The purpose of the present application is to provide a gas pipeline leakage detection device to solve the problems in the background art.

[0007] To achieve the above purpose, the present application provides the following technical scheme: a gas pipeline leakage detection device, comprising:

[0008] A positioning frame is provided with a propulsion assembly, and one side of the positioning frame is rotatably provided with two bidirectional lead screws through a first support arm, and the two bidirectional lead screws are transmissionally connected.

[0009] Two mirror image arc-shaped detection members, two screw transmission members are symmetrically fixed on the arc-shaped detection members, the screw transmission members are sleeved on the bidirectional screw rod and are in threaded cooperation with the bidirectional screw rod, two sides of the arc-shaped detection members are provided with a receiving box in communication therewith, a impeller is rotatably installed in the receiving box, a second motor is fixed outside the receiving box, an output shaft of the second motor is coaxially fixed with a rotating shaft of the second motor, and through holes are formed in the two sides of the arc-shaped detection member.

[0010] Two detectors, the two detectors are fixed on the two sides of the positioning frame, and the detectors are in communication with the receiving boxes through a plurality of first output pipes.

[0011] Preferably, four movable members are slidingly installed on the positioning frame, and rollers are rotatably installed at the ends of the movable members.

[0012] The movable member comprises a sliding plate and a limiting plate, the movable member is slidingly installed in a sliding groove starting from the positioning frame, a plurality of springs are fixed on the side of the limiting plate facing the positioning frame, and the ends of the springs away from the limiting plate are fixed with the positioning frame.

[0013] Preferably, the advancing assembly comprises an adjusting member hinged to the side of the positioning frame away from the arc-shaped detection member, and a driving wheel is rotatably installed at the end of the adjusting member.

[0014] A worm gear is coaxially installed on the rotating shaft of the adjusting member, the worm gear is engaged with a worm rotatably installed on the positioning frame, and a driving mechanism is connected and installed on the positioning frame.

[0015] Preferably, the driving mechanism comprises a mounting member fixedly installed on the positioning frame, a ratchet gear is rotatably installed on the mounting member, a pawl disc is rotatably installed in the ratchet gear and unidirectionally matched with the ratchet gear, a transmission rod is rotatably installed on the side of the ratchet gear, the pawl disc and the transmission rod are in transmission connection, the ratchet gear and the driving wheel are in transmission connection, and the transmission rod and the bidirectional screw rod are in transmission connection.

[0016] A first motor is further fixed on the positioning frame, and an output shaft of the first motor is coaxially fixed with the pawl disc.

[0017] Preferably, an annular conveying member is arranged on the side of the arc-shaped detection member away from the positioning frame, a plurality of second support arms are arranged on the annular conveying member, and a plurality of high-pressure nozzles are circumferentially and equidistantly fixed on the inner wall of the annular conveying member and in communication with the annular conveying member.

[0018] Preferably, a storage box is fixed at the bottom of the positioning frame, and the storage box is in communication with the annular conveying member through a second output pipe.

[0019] The positioning frame is fixed between the arc-shaped detection piece and the two-way air cylinder, the output end of the two-way air cylinder is communicated with the storage box, and the movable rods on the two sides of the storage box are fixed with the threaded transmission member through the connecting plate.

[0020] Preferably, the driving wheel comprises two taper wheels, the two taper wheels are coaxially fixed through a connecting shaft, and the connecting shaft is in transmission connection with the ratchet cylinder.

[0021] Preferably, the two-way air cylinder comprises two piston cylinders, the discharge end of the two piston cylinders is sealingly fixed with a temporary storage pipe, and the temporary storage pipe is communicated with the storage box.

[0022] The piston is sealingly and slidably installed in the two piston cylinders, the two movable rods are coaxially fixed on the opposite side of the piston, and the discharge end of the two piston cylinders is fixed with a one-way valve.

[0023] Compared with the prior art, the application has the following beneficial effects: the positioning frame is positioned by the plurality of rollers, the through hole can move radially along the pipeline and cannot rotate around the pipeline, the positioning frame is driven to move intermittently along the pipeline by driving the driving wheel to rotate, the arc-shaped detection piece and the annular conveying piece are moved by the positioning frame, the gas around the outer wall of the pipeline is conveyed into the detector during the intermittent period for detection, whether the current paragraph of the pipeline leaks is detected, and the quality of detection and the stability of the roller are improved by cleaning the pipeline in front of the arc-shaped detection piece during the intermittent period.

[0024] The pipeline is detected by the automatic intermittent detection mode, the problem of arm soreness caused by the staff holding the detection cavity is solved, and the quality of troubleshooting is improved to a certain extent compared with manual detection. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the application;

[0026] Figure 2 It is Figure 1 It is a schematic diagram of another direction structure;

[0027] Figure 3 It is Figure 1 It is a schematic diagram of another angle mechanism;

[0028] Figure 4 It is Figure 1 It is a structural exploded view;

[0029] Figure 5 It is Figure 4Enlarged view at A;

[0030] Figure 6 Structure diagram of the driving mechanism in the application;

[0031] Figure 7 Structure diagram of the driving mechanism in the application; Figure 6 Enlarged view at B;

[0032] Figure 8 Structure diagram of the driving mechanism in the application;

[0033] Figure 9 Structure diagram of the driving mechanism in the application;

[0034] Figure 10 Structure diagram of the driving mechanism in the application; Figure 9 Structure exploded view.

[0035] In the figure: 1, positioning frame; 2, detector; 3, driving wheel; 4, adjusting piece; 5, first motor; 6, annular conveying piece; 7, threaded transmission piece; 8, bidirectional screw; 9, transmission shaft; 10, arc-shaped detection piece; 11, receiving box; 12, second motor; 13, first output pipe; 14, high-pressure spray head; 15, impeller; 16, first support arm; 17, second support arm; 18, storage box; 19, bidirectional air cylinder; 20, second output pipe; 21, through hole; 22, connecting plate; 23, movable piece; 24, roller; 25, spring; 26, worm; 27, worm gear; 28, transmission rod; 29, mounting piece; 30, pawl disc; 31, ratchet cylinder; 32, framework; 33, identification piece; 34, driving ring; 35, second spring. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0037] Please refer to Figures 1-10 The application provides a technical solution: a gas pipeline leakage detection device, which comprises a positioning frame 1, a propelling assembly is installed on the positioning frame 1, two bidirectional screws 8 are rotatably installed on one side of the positioning frame 1 through a first support arm 16, the two bidirectional screws 8 are transmissionally connected, the two bidirectional screws 8 are a first bidirectional screw and a second bidirectional screw respectively, a transmission shaft 9 is rotatably installed on the first support arm 16, the first bidirectional screw and the second bidirectional screw are connected with the transmission shaft 9 through a first belt, and the two transmission shafts 9 are connected through a second belt.

[0038] Two mirror image arranged arc detection pieces 10, two screw drives 7 are symmetrically fixed on the arc detection piece 10, the screw drive 7 is sleeved on the bidirectional screw rod 8 and is screwed with the bidirectional screw rod 8, two arc detection pieces 10 opposite sides are provided with the communicating receiving box 11, the impeller 15 is rotatably installed in the receiving box 11, the second motor 12 is fixed on the outside of the receiving box 11, the output shaft of the second motor 12 is coaxially fixed with the rotating shaft of the second motor 12, and the arc detection piece 10 both sides have through holes 21;

[0039] Two detectors 2, two the detector 2 is fixed on the both sides of the positioning frame 1, the detector 2 is communicated with the receiving box 11 through a plurality of first output pipes 13.

[0040] Further, the intermittent advancement is driven by the advancing assembly, the bidirectional screw rod 8 is rotated during the intermittent period, the relative motion of the two arc detection pieces 10 is driven by the screw thread cooperation with the screw drive 7 when the bidirectional screw rod 8 rotates, so that the arc surface on the opposite side of the two arc detection pieces 10 is attached to the outer wall of the pipeline;

[0041] When the second motor 12 works, the impeller 15 is rotated by the output shaft, and the air outside the receiving box 11 and the arc detection piece 10 is sucked into the receiving box 11 and the arc detection piece 10 through the through hole 21 when the impeller 15 rotates, the air in the receiving box 11 is sucked into the receiving box 11 and the arc detection piece 10 through the first output pipe 13 when the detector 2 works, and the air is detected, and then the current position of the pipeline is obtained.

[0042] Wherein, by driving the two arc detection pieces 10 to move towards the opposite direction, the positioning frame 1 is driven to advance by the advancing assembly, and the pipeline can be automatically and continuously detected by repeating the above movement state.

[0043] It should be noted that the detector 2 in the application is the use of prior art, and the main purpose is to detect the alkane value in the air, so as to obtain whether the gas leaks.

[0044] Four movable pieces 23 are slidably installed on the positioning frame 1, and the roller 24 is rotatably installed at the end of the movable piece 23.

[0045] The movable piece 23 includes a sliding plate and a limiting plate, the movable piece 23 is slidably installed in the sliding groove on the positioning frame 1, a plurality of springs 25 are fixed on the side of the limiting plate towards the positioning frame 1, and the end away from the limiting plate is fixed with the positioning frame 1.

[0046] Further, when the positioning frame 1 is installed on the pipeline, the detector 2 is directly sleeved to the outside of the pipeline through one end of the pipeline.

[0047] When the roller 24 contacts with the pipe end, the movable part 23 is driven to slide to make room, so that the spring 25 is pulled up by the limiting plate, the spring 25 is deformed to store a certain elastic potential energy, when the roller 24 moves to the outer wall of the pipe, the movable part 23 is driven by the elastic potential energy stored by the spring 25 to a force towards the pipe, and then the elastic clamping positioning effect is achieved;

[0048] Wherein, after positioning is completed, the positioning frame 1 can be driven to move along the pipe radially;

[0049] It should be noted that the rolling direction of the roller 24 is the length direction of the pipe, the roller 24 is made of rubber material, and then has good anti-skid effect, so that the roller 24 can roll towards the length direction of the pipe and cannot rotate around the pipe.

[0050] The advancing assembly comprises an adjusting part 4 hinged to one side of the positioning frame 1 away from the arc-shaped detection part 10, and a driving wheel 3 rotatably installed at the end of the adjusting part 4.

[0051] A worm wheel 27 is coaxially arranged on the rotating shaft of the adjusting part 4, the worm wheel 27 is engaged with a worm 26 rotatably installed on the positioning frame 1, and the driving wheel 3 is connected and installed on the driving mechanism of the positioning frame 1.

[0052] The driving wheel 3 comprises two conical wheels coaxially fixed by a connecting shaft, and the connecting shaft is in transmission connection with the ratchet cylinder 31.

[0053] The driving mechanism comprises a mounting part 29 fixedly installed on the positioning frame 1, a ratchet cylinder 31 rotatably installed on the mounting part 29, a pawl disc 30 unidirectionally matched with the ratchet cylinder 31 rotatably installed in the ratchet cylinder 31, a transmission rod 28 rotatably installed on one side of the ratchet cylinder 31, a third belt connecting the pawl disc 30 and the transmission rod 28, a fourth belt connecting the ratchet cylinder 31 and the driving wheel 3, and a fifth belt connecting the transmission rod 28 and the bidirectional screw rod 8.

[0054] The first motor 5 is also fixed on the positioning frame 1, and the output shaft of the first motor 5 is coaxially fixed with the pawl disc 30.

[0055] Further, when the first motor 5 works, the pawl disc 30 is driven to rotate clockwise or counterclockwise by the output shaft, the pawl disc 30 drives the transmission rod 28 to rotate through the No. 3 belt when rotating, the transmission rod 28 drives the bidirectional screw rod 8 to rotate through the No. 5 belt when rotating, the bidirectional screw rod 8 drives the two arc-shaped detection pieces 10 to move relative to each other through the two threaded transmission pieces 7 when rotating, and the pawl disc 30 also drives the ratchet cylinder 31 to rotate when rotating, the ratchet cylinder 31 drives the bidirectional screw rod 8 to rotate through the No. 4 belt when rotating, and the two arc-shaped detection pieces 10 stop rotating when abutting against the outer wall of the pipeline on one side;

[0056] After the current paragraph detection is completed, the pawl disc 30 is driven to rotate in the opposite direction by the first motor 5, the pawl disc 30 drives the transmission rod 28 to rotate in the opposite direction, and the bidirectional screw rod 8 is driven to rotate in the opposite direction, so that the two arc-shaped detection pieces 10 are driven to move in the opposite direction through the two threaded transmission pieces 7 under the rotation of the bidirectional screw rod 8 in the opposite direction;

[0057] Wherein, when the pawl disc 30 rotates in the opposite direction, the pawl disc 30 does not have a transmission relationship with the ratchet cylinder 31, so that the ratchet cylinder 31 does not rotate when the pawl disc 30 rotates in the opposite direction, so that the driving wheel 3 does not rotate when the pawl disc 30 rotates in the opposite direction;

[0058] The achieved effect is that when the pawl disc 30 is driven to rotate to drive the driving wheel 3 to rotate, the two arc-shaped detection pieces 10 are also driven to move relative to each other, and the arc-shaped detection pieces 10 stop rotating when moving to the end of the stroke, and only the two arc-shaped detection pieces 10 are driven to move in the opposite direction when the pawl disc 30 rotates in the opposite direction;

[0059] When the pawl disc 30 rotates, the two arc-shaped detection pieces 10 are driven to move relative to each other while the positioning frame 1 is driven to move along the radial direction of the pipeline by the driving wheel 3, and the driving wheel 3 does not rotate when the driving wheel 3 rotates in the opposite direction, so that the positioning frame 1 does not move, and only the two arc-shaped detection pieces 10 are driven to move relative to each other;

[0060] In order to intermittently push the positioning frame 1 forward, and repeatedly drive the arc-shaped detection pieces 10 to move relative to or in the opposite direction to detect the pipeline.

[0061] Further, since the pipeline is annular, if a normal circular wheel is used, the force receiving surface of the circular wheel needs to be adjusted to face the angle of the tank,

[0062] Usually, it needs to be adjusted to an "eight" shape, and the transmission between the two circular wheels will be too complex, thereby increasing the production cost;

[0063] The driving wheel 3 is set to a conical wheel, so that the inclined surface of the conical wheel can perfectly abut against the pipeline, the force receiving surface of the conical wheel is perpendicular to the outer wall of the pipeline, and the two conical wheels are coaxial, so that the transmission is relatively simple.

[0064] The outer side of the conical wheel is provided with a rubber layer of about 2 cm.

[0065] Further, the worm 26 is driven to rotate by an external force, and the worm 26 drives the adjusting member 4 to rotate through the worm gear 27 when rotating, and the adjusting member 4 drives the driving wheel 3 to overturn when rotating, and the driving wheel 3 stops rotating after being abutted against the outer wall of the pipeline, and the driving wheel 3 is driven to rotate by the driving mechanism, and the driving wheel 3 pushes the positioning frame 1 to move forward when rotating;

[0066] The adjusting member 4 is driven to overturn through the cooperation of the worm 26 and the worm 26, so that the driving wheel 3 can be in a state of continuously abutting against the outer wall of the pipeline;

[0067] It should be further pointed out that the driving wheel 3 is made of rubber material.

[0068] The arc-shaped detection member 10 is provided with a ring-shaped conveying member 6 away from the side of the positioning frame 1, the ring-shaped conveying member 6 is connected through a plurality of second supporting arms 17, and a plurality of high-pressure nozzles 14 in communication with the ring-shaped conveying member 6 are fixed on the inner wall circumference of the ring-shaped conveying member 6 at equal intervals.

[0069] Further, water is supplied to the inner side of the ring-shaped conveying member 6, and the water is dispersed to the plurality of high-pressure nozzles 14 through the ring-shaped conveying member 6, and the water is sprayed to the pipeline through the high-pressure nozzles 14 to clean the outer wall of the pipeline, and because the ring-shaped conveying member 6 is fixed to the positioning frame 1 through the second supporting arms 17, and the positioning frame 1 moves intermittently, sufficient time is given for cleaning;

[0070] The pipeline is washed to clearly remove the soil and dust on the outer wall of the pipeline, and the positioning stability of the roller 24 is improved to a certain extent, and because the detection is performed by conveying gas into the detector 2, in order to avoid a large amount of dust from entering the detector 2 to cause blockage, the cleaning can perfectly avoid the occurrence of this problem.

[0071] The positioning frame 1 is fixed with a storage box 18 at the bottom, and the storage box 18 is connected to the ring-shaped conveying member 6 through a second output pipe 20.

[0072] The positioning frame 1 and the arc-shaped detection member 10 are fixed with a bidirectional air cylinder 19, the output end of the bidirectional air cylinder 19 is connected to the storage box 18, and the movable rods on both sides of the storage box 18 are fixed with the screw transmission member 7 through a connecting plate 22.

[0073] Further, when the two threaded driving members 7 move towards opposite directions, the two movable rods of the bidirectional air cylinder 19 are driven to move towards opposite directions by the connecting plate 22, so that the two movable rods are driven to move towards opposite directions when the two threaded driving members 7 move relatively, and the pressure inside the storage box 18 is increased through the output end when the two move relatively, so that the water stored in the storage box 18 is delivered to the inside of the annular conveying member 6 through the second output pipe 20 under the drive of the atmospheric pressure, so as to automatically deliver water to the annular conveying member 6 when detection is performed, and the structure adopted is relatively simple.

[0074] The bidirectional air cylinder 19 comprises two piston cylinders, a temporary storage pipe is sealingly fixed to the discharge end of each of the two piston cylinders, the temporary storage pipe is communicated with the storage box 18, a piston is sealingly and slidably installed in each of the two piston cylinders, the two movable rods are coaxially fixed to the opposite side of the piston, and a one-way valve is fixed to the discharge end of each of the two piston cylinders.

[0075] Further, the positioning frame 1 is positioned by the plurality of rollers 24, so that the through hole 21 can move radially along the pipeline and cannot rotate around the pipeline, the positioning frame 1 is driven to move intermittently along the pipeline by driving the driving wheel 3 to rotate, the arc-shaped detection member 10 and the annular conveying member 6 are driven to move with the positioning frame 1, the gas around the outer wall of the pipeline is delivered to the detector 2 during the intermittent period for detection, so as to detect whether the current section of the pipeline leaks, and secondly, the pipeline in front of the arc-shaped detection member 10 is cleaned during the intermittent period, so as to improve the detection quality and the stability of the rollers 24.

[0076] The pipeline is detected by the automatic intermittent detection mode, the automatic degree is improved, the problem of arm soreness caused by the staff holding the detection cavity is solved, and compared with manual detection, the outer wall of the pipeline is cleaned before detection, the dust and soil on the outer wall of the pipeline are removed, the leaking part of the pipeline is exposed, and the quality of the troubleshooting is improved to a certain extent.

[0077] Further, the positioning frame 1 is positioned by the plurality of rollers 24, so that the through hole 21 can move radially along the pipeline and cannot rotate around the pipeline, the positioning frame 1 is driven to move intermittently along the pipeline by driving the driving wheel 3 to rotate, the arc-shaped detection member 10 and the annular conveying member 6 are driven to move with the positioning frame 1, the gas around the outer wall of the pipeline is delivered to the detector 2 during the intermittent period for detection, so as to detect whether the current section of the pipeline leaks, and secondly, the pipeline in front of the arc-shaped detection member 10 is cleaned during the intermittent period, so as to improve the detection quality and the stability of the rollers 24.

[0078] The skeleton 32 is further fixed with the second support arm 17.

[0079] The two skeletons 32 are further provided with a driving ring 34, and the driving ring 34 is connected with a driving device.

[0080] Further, the driving device is a bidirectional electric push rod, the movable rod of the bidirectional electric push rod is fixed with the two driving rings 34, and the bidirectional electric push rod is located between the two driving rings 34;

[0081] When the bidirectional electric push rod works, the two driving rings 34 are driven to move towards opposite directions, and when the two driving rings 34 move towards opposite directions, the driving rings 34 are in contact with the inclined surface arranged on the identification member 33, and with the movement of the driving rings 34, the identification member 33 is driven to move towards the center of the skeleton 32 through the inclined surface, until the end surface of the identification member 33 is in contact with the pipeline, so as to print the identification dye arranged on the end surface of the identification member 33 to the outer wall of the pipeline;

[0082] When the second spring 35 moves, the second spring 35 is also pulled up, so that the second spring 35 is deformed to store elastic potential energy, and when the two driving rings 34 move towards opposite directions, the identification member 33 is driven to reset through the release of the elastic potential energy stored in the second spring 35;

[0083] It should be noted that the bidirectional electric push rod is electrically connected with the detector 2, and when the detector 2 detects that there is a gas component in the gas, the bidirectional electric push rod is driven to work, and the current position is identified, so as to facilitate subsequent operation.

[0084] It should be noted that in this document, the terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0085] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A gas pipeline leak detection apparatus, characterized by, The utility model relates to a positioning frame (1) is installed with the propulsion assembly on, one side of positioning frame (1) is rotatoryly installed with two two -way screw rods (8) through first support arm (16), and two two -way screw rods (8) are transmission connection between, two mirror image setting arc detection spare (10) are fixed with two screw transmission parts (7) on symmetry, screw transmission part (7) is set on two -way screw rod (8) and is with two -way screw rod (8) screw thread cooperation, and two arc detection spare (10) opposite side all are provided with the accommodating box (11) of communication with it, the accommodating box (11) rotatoryly installed with impeller (15) in, the accommodating box (11) outside fixed with second motor (12), and the output shaft of second motor (12) is coaxial fixed with the rotation axis of second motor (12), and both sides of arc detection spare (10) all have through -hole (21), two detectors (2) are fixed in both sides of positioning frame (1), and the detector (2) is communicated accommodating box (11) through a plurality of first output pipe (13), positioning frame (1) is slidably installed with four movable element (23), and the end rotatoryly installed with the gyro wheel (24) of movable element (23), movable element (23) includes sliding plate and limit board, and movable element (23) is slidably installed in the slide groove that starts on positioning frame (1), and a plurality of springs (25) are fixed to the limit board towards one side of positioning frame (1), and the end of spring (25) away from the limit board is fixed with positioning frame (1), the propulsion assembly includes the adjusting spare (4) that is hinged to the side of positioning frame (1) away from arc detection spare (10), and the end rotatoryly installed with the drive wheel (3) of adjusting spare (4), the rotation axis of adjusting spare (4) has the worm wheel (27) of coaxial pipeline, and worm wheel (27) is engaged with the worm (26) rotatoryly installed on positioning frame (1), and drive wheel (3) is connected and installed on the drive mechanism of positioning frame (1), the drive mechanism includes the mounting element (29) fixedly installed on positioning frame (1), and the ratchet cylinder (31) rotatoryly installed on mounting element (29), and the pawl disc (30) unidirectional cooperation rotatoryly installed in ratchet cylinder (31), and the transmission rod (28) rotatoryly installed on one side of ratchet cylinder (31) still, and the transmission connection between pawl disc (30) and transmission rod (28), the transmission connection between ratchet cylinder (31) and drive wheel (3), the transmission connection between transmission rod (28) and two -way screw rod (8), positioning frame (1) still is fixed with first motor (5), and the output shaft of first motor (5) is coaxial fixed with pawl disc (30), drive wheel (3) includes two taper wheels, and two taper wheels are coaxially fixed through connecting shaft, and the transmission connection between connecting shaft and ratchet cylinder (31). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. A gas pipeline leak detection apparatus according to claim 1, wherein: The arc-shaped detection piece (10) is provided with a ring-shaped conveying piece (6) away from the positioning frame (1), the ring-shaped conveying piece (6) is communicated with the ring-shaped conveying piece (6) through a plurality of second supporting arms (17), and a plurality of high-pressure nozzles (14) are fixed on the inner wall circumference of the ring-shaped conveying piece (6) at equal intervals.

3. A gas pipeline leak detection apparatus according to claim 2, wherein: The bottom of the positioning frame (1) is fixed with a storage box (18), and the storage box (18) is communicated with the ring-shaped conveying piece (6) through a second output pipe (20); The positioning frame (1) and the arc-shaped detection piece (10) are fixed with a two-way air cylinder (19), the output end of the two-way air cylinder (19) is communicated with the storage box (18), and the movable rods on both sides of the storage box (18) are fixed with the threaded transmission piece (7) through a connecting plate (22).

4. A gas pipeline leak detection apparatus according to claim 3, wherein: The two-way air cylinder (19) comprises two piston cylinders, and a temporary storage pipe is sealingly fixed at the discharge end of the two piston cylinders, and the temporary storage pipe is communicated with the storage box (18); Two pistons are sealingly and slidably installed in the two piston cylinders, two movable rods are coaxially fixed on the opposite side of the piston, and a one-way valve is fixed at the discharge end of the two piston cylinders.

5. A gas pipeline leak detection apparatus according to claim 2, wherein Further comprising two skeletons (32), two skeletons (32) are located on both sides of the arc-shaped detection piece (10), two skeletons (32) are fixedly connected, and the skeleton (32) is further fixed with the second supporting arm (17); A plurality of movement grooves are circumferentially and equidistantly arranged on the skeleton (32), a plurality of skeletons (32) are slidably installed in the movement grooves, and the skeleton (32) is fixed with the inner side of the skeleton (32) through a fixedly connected second spring (35); Two skeletons (32) are further provided with a driving ring (34), and the driving ring (34) is connected with a driving device.

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