Methane leakage detection device for natural gas pipeline

Abstract

The invention belongs to the technical field of natural gas pipeline detection, and particularly discloses a natural gas pipeline methane leakage detection device which comprises a frame framework, a wheel set component, an opening and closing detection assembly and a driving part. The opening and closing detection assembly is located on the vehicle frame framework, and the wheel set component is installed on the vehicle frame framework and can drive the vehicle frame component to advance; the opening and closing detection assembly comprises a bottom frame and an upturning frame, the bottom frame is connected with the frame framework, one end of the upturning frame is hinged to one end of the bottom frame, the other end of the upturning frame is detachably connected with the other end of the bottom frame, and the inner side of the bottom frame and the inner side of the upturning frame are both in a semicircular ring shape; a bottom gear ring is arranged on the inner side of the bottom frame, an upper gear ring is arranged on the inner side of the upturning frame, and after the upturning frame and the bottom frame are buckled with each other, the bottom gear ring and the upper gear ring form a complete gear ring; one or more detection probes are arranged on the inner ring of the bottom gear ring and / or the inner ring of the upper gear ring; and the driving piece is used for driving a gear ring formed by the bottom gear ring and the upper gear ring to rotate. According to the invention, through the arrangement of the openable and closable upturning frame and the underframe and the linkage formed by the opening and closing detection assembly and the wheel set member, methane leakage detection can be performed on the periphery of the natural gas pipeline in a synchronous spiral surrounding manner in the process of advancing along the natural gas pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas pipeline detection, and in particular to a natural gas pipeline methane leakage detection device. Background Art

[0002] A natural gas pipeline, also known as a gas transmission pipeline, is a pipeline that transports natural gas (including associated gas from oil fields) from extraction sites or processing plants to urban distribution centers or industrial users. Transmitting natural gas via pipelines is a common method of transporting large quantities of natural gas on land. Specifically, natural gas pipelines account for approximately half of the world's total pipeline length.

[0003] Natural gas is primarily composed of methane, a flammable and explosive gas. Therefore, long-distance natural gas pipelines require regular methane leak detection. The traditional detection method involves inspectors patrolling the pipelines with handheld detectors. While this method is flexible and versatile, it suffers from labor-intensive and inaccurate detection. Summary of the Invention

[0004] The present invention provides a methane leakage detection device for a natural gas pipeline. The purpose is to provide an openable and closable upper frame and lower frame, and the linkage formed by the opening and closing detection component and the wheel group component, so that methane leakage detection can be performed on the periphery of the natural gas pipeline in a synchronous spiral surrounding manner while traveling along the natural gas pipeline.

[0005] The present invention is achieved through the following technical solutions: a natural gas pipeline methane leakage detection device, comprising a vehicle frame, a wheel assembly, an opening and closing detection assembly, and a driving member;

[0006] The opening and closing detection assembly is located on the vehicle frame, and the wheel assembly is mounted on the vehicle frame and is capable of driving the vehicle frame assembly forward;

[0007] The opening and closing detection assembly includes a bottom frame and an upper flip frame, the bottom frame is connected to the vehicle frame, one end of the upper flip frame is hinged to one end of the bottom frame, and the other end of the upper flip frame is detachably connected to the other end of the bottom frame, and the inner sides of the bottom frame and the inner sides of the upper flip frame are both semicircular;

[0008] A bottom gear ring is provided on the inner side of the base frame, and an upper gear ring is provided on the inner side of the upper flip frame. After the upper flip frame and the base frame are buckled with each other, the bottom gear ring and the upper gear ring form a complete gear ring; the inner ring of the bottom gear ring and / or the upper gear ring is provided with one or more detection probes; the driving member is used to drive the gear ring formed by the bottom gear ring and the upper gear ring to rotate.

[0009] In this solution, when the upper and lower frames interlock with each other outside the natural gas pipeline, the upper and lower gear rings form a complete ring. A driver then rotates the ring, enabling the detection probe to detect methane leaks in the natural gas pipeline. The wheel assembly drives the vehicle frame and its opening and closing detection assembly along the natural gas pipeline. This, combined with the driver's rotation of the gear ring, allows the detection probe to perform dynamic spiral detection based on the natural gas pipeline.

[0010] Furthermore, the vehicle frame includes a frame, the wheel group components include multiple groups of wheels, each group has two wheels, multiple groups of wheel seats are connected to the frame, each group has two wheel seats, the two wheel seats in each group of wheel seats are respectively located on both sides of the frame, each group of wheel seats is rotatably connected to a wheel axle, and the multiple groups of wheels are in turn rotatably connected to the multiple groups of wheel seats through the wheel axles.

[0011] Furthermore, a central shaft is connected between two wheels in one set of wheels on the frame, and a middle pulley is coaxially connected to the central shaft;

[0012] The frame component also includes a top cover, and the opening and closing detection component and the top cover are arranged side by side; the top cover is installed at the top of the frame, and a travel motor is installed on the inner top surface of the top cover. The output shaft of the travel motor is connected to a drive pulley, and a connecting belt is connected between the drive pulley and the middle pulley.

[0013] Furthermore, a main controller is installed on the top cover, and the travel motor and the detection probe are electrically connected to the main controller.

[0014] Furthermore, the driving member includes a worm wheel, a worm, a connecting gear, a lower gear and a connecting shaft. The worm is coaxially connected to the middle shaft. A connecting seat is connected to the bottom of the base frame. One end of the connecting shaft is coaxially connected to the worm wheel, and the other end of the connecting shaft is rotatably connected to the connecting seat. The connecting gear is coaxially connected to the connecting shaft. A lower shaft is rotatably connected to the connecting seat. The lower gear is coaxially connected to the lower shaft. Both sides of the lower gear are respectively meshed with the connecting gear and the bottom gear ring, and the worm wheel is meshed with the worm.

[0015] Furthermore, a bottom slide groove is opened on the inner side of the base frame, the bottom gear ring is located in the bottom slide groove and can rotate circumferentially along the bottom slide groove, and an upper slide groove is opened on the inner side of the upper flip frame, the upper gear ring is located in the upper slide groove and can rotate circumferentially along the upper slide groove.

[0016] Furthermore, a plurality of bottom bullet holes are formed on one side of the bottom frame along its circumference, a plurality of top bullet holes are formed on one side of the upper flip frame along its circumference, an upper side groove is formed concentrically on the outer side of the upper gear ring, and a bottom side groove is formed concentrically on the outer side of the bottom gear ring, a path formed by the plurality of bottom bullet holes is arranged opposite to the bottom side groove, and a path formed by the plurality of top bullet holes is arranged opposite to the upper side groove;

[0017] A limiting unit is slidably inserted into the bottom bullet hole and the top bullet hole. The limiting unit includes a marble and a sealing plate. A retaining spring is connected between the marble and the sealing plate. The marble in the bottom bullet hole and the marble in the top bullet hole can be elastically slidably inserted into the bottom side groove and the upper side groove respectively.

[0018] Furthermore, the upper groove and the bottom groove are both arc-shaped grooves, and the end of the marble inserted into the upper groove and the bottom groove is hemispherical.

[0019] Furthermore, it also includes an upper fixed-point component, which includes a mounting seat, a handwheel and a top gear. The mounting seat is connected to the outside of the upper flip frame, and a top rotating shaft is rotatably connected to the mounting seat. One end of the top rotating shaft is coaxially connected to the top gear, and the other end of the top rotating shaft is coaxially connected to the handwheel; the top gear is meshed with the upper gear ring; a circle of tooth grooves is provided on the outer periphery of the handwheel; one side of the mounting seat is connected to a bottom clamping tooth that can produce elastic deformation, and the bottom clamping tooth is elastically clamped in the tooth groove.

[0020] Furthermore, a top connecting plate is connected to the mounting seat, and two arc-shaped spring pieces are symmetrically connected to the top connecting plate. The arc-shaped spring pieces are arc structures bent outward, and the bottom locking teeth are fixed to the lower parts of the two arc-shaped spring pieces.

[0021] Furthermore, it also includes a locking assembly, the locking assembly including a locking seat and a locking spring, the locking seat is connected to one end of the base frame, and a locking hole is opened on the locking seat;

[0022] The locking spring is connected to one end of the upper flip frame, and a locking column is connected to the side of the locking spring facing the lock hole. The locking spring can produce elastic deformation. After the upper flip frame is buckled with the bottom frame, the locking column can be elastically locked in the lock hole to realize the detachable connection between the upper flip frame and the bottom frame.

[0023] Furthermore, a movable plate is connected to the upper flip frame, and the movable plate and the locking seat are staggered. The locking spring includes a first plate, an inclined plate and a second plate. One end of the first plate is connected to the movable plate, and the other end of the first plate is connected to the inclined plate. The inclined plate is tilted, and one end of the second plate is connected to an end of the inclined plate away from the first plate, and the first plate and the second plate are parallel to each other; the card column is connected to the second plate.

[0024] Furthermore, one end of the base frame is connected to a fixed seat, one end of the upper flip frame is connected to a side swivel seat, the fixed seat is inserted into the side swivel seat, and the side swivel seat is rotatably connected to the fixed seat.

[0025] Furthermore, a positioning touch switch is connected to the inner side of the base frame, and a positioning touch pad is connected to the inner side of the bottom gear ring. After the bottom gear ring is rotated until its top surface coincides with the top surface of the base frame, the positioning touch pad can touch the positioning touch switch, and the positioning touch switch is electrically connected to the main controller.

[0026] Furthermore, the inner ring of the bottom gear ring is connected to a flexible ball. After the base frame and the upper flip frame are buckled on the outer wall of the natural gas pipeline, there is a distance between the flexible ball and the outer wall of the natural gas pipeline, and the height of the flexible ball is greater than the height of the detection probe.

[0027] Furthermore, the detection probes are provided in plurality, and the plurality of detection probes are circumferentially distributed in the inner rings of the bottom gear ring and the upper gear ring.

[0028] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0029] (1) The present invention is mainly used for detecting methane leaks in outdoor natural gas pipelines. By providing rolling wheels at the lower end of the vehicle frame member and placing the present invention below the natural gas pipeline, the present invention can be moved along the natural gas pipeline, providing a basis for automatic detection.

[0030] (2) An openable and closable underframe and upper flip frame are provided at the end of the vehicle frame member. When the upper flip frame is opened relative to the underframe, the present invention can be conveniently placed under the natural gas pipeline at any starting point. As the upper flip frame and the underframe are closed, the upper gear ring can form a complete set of gear rings with the bottom gear ring. At this time, as the present invention moves, the worm can be driven to rotate, and the worm can drive the rotation of the lower gear through the transmission mechanism, thereby driving the upper gear ring and the bottom gear ring to form a complete set of gear rings, and further driving the rotation of the detection probe. As a result, the present invention can dynamically spirally detect methane leaks in the natural gas pipeline during its movement along the natural gas pipeline, and has the characteristic of high detection accuracy.

[0031] (3) In order to ensure that the bottom surface of the upper gear ring and the bottom surface of the upper flip frame can be aligned when in the open state, so that when the upper flip frame and the bottom frame are closed, the upper gear ring and the bottom gear ring do not interfere with each other and just form a full circle, the present invention also has an upper fixed point component, which can be used to level the upper gear ring before closing by elastically engaging the bottom teeth formed by turning the hand wheel with the tooth groove.

[0032] (4) In the locking assembly of the present invention, the locking column on the locking spring is elastically locked in the locking hole of the locking seat, thereby realizing the detachable connection between the upper flip frame and the bottom frame, which is convenient for fastening the upper flip frame and the bottom frame. At the same time, the locking column can be easily pulled out from the locking hole of the locking seat by prying the locking spring, thereby facilitating the opening of the upper flip frame and the bottom frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention after the upper flip frame and the bottom frame are buckled together;

[0035] Figure 2 This is a schematic diagram of the overall structure of the present invention after the upper flip frame and the bottom frame are opened;

[0036] Figure 3 It is a structural diagram of the vehicle frame components in the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the connection and cooperation between the wheel assembly component and the frame component in the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of the wheel assembly, the driving member and the opening and closing detection assembly in the present invention. Figure 1 ;

[0039] Figure 6 The schematic diagram of the structure of the driving member, the wheel assembly and the opening and closing detection assembly in the present invention Figure 2 ;

[0040] Figure 7 Schematic diagram of the partial structure of the opening and closing detection component in the present invention;

[0041] Figure 8 It is a schematic diagram of the partial structure of the cooperation between the limiting unit and the upper groove or the lower groove in the present invention;

[0042] Figure 9 It is a partial structural diagram of the upper fixed point assembly cooperating with the upper gear ring and the upper gear rack in the present invention;

[0043] Figure 10 It is a structural schematic diagram of the locking assembly in the present invention.

[0044] Markings and corresponding parts names in the accompanying drawings:

[0045] 1. Frame components; 2. Wheelset components; 3. Opening and closing detection components; 4. Upper fixed point components; 5. Locking components;

[0046] 101. Frame; 102. Top cover;

[0047] 201, wheel seat; 202, wheel axle; 203, wheel; 204, middle shaft; 205, middle pulley; 206, travel motor; 207, drive pulley; 208, connecting belt; 209, main controller;

[0048] 301, bottom frame; 302, side swivel seat; 3021, fixed seat; 303, upper flip frame; 304, bottom slide; 305, bottom gear ring; 306, bottom side groove; 307, detection probe; 308, positioning touch switch; 309, positioning touch pad; 310, upper slide; 311, upper gear ring; 312, upper side groove; 313, worm; 314, worm gear; 315, connecting seat; 316, connecting shaft; 317, connecting gear; 318, lower shaft; 319, lower gear; 320, bottom bullet hole; 321, top bullet hole; 322, marble; 323, retaining spring; 324, sealing plate; 325, flexible ball;

[0049] 40. Mounting seat; 401. Top rotation hole; 402. Top rotation shaft; 403. Top gear; 404. Handwheel; 405. Tooth groove; 406. Top connecting plate; 407. Arc-shaped spring piece; 408. Bottom locking tooth;

[0050] 501, locking seat; 502, moving plate; 503, locking spring; 504, locking column. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0052] like Figure 1-10 As shown, this embodiment provides a natural gas pipeline methane leakage detection device, including a vehicle frame, a wheel assembly 2, an opening and closing detection component 3, a drive component, an upper fixed point component 4 and a locking component 5; the opening and closing detection component 3 is located on the vehicle frame, and the wheel assembly 2 is installed on the vehicle frame and can drive the vehicle frame component 1 forward.

[0053] In this embodiment, the vehicle frame includes a rectangular frame 101, and the wheel group component 2 includes multiple groups of wheels 203. In this embodiment, the wheel group component 2 is described by taking two groups of wheels 203 as an example, and the number of each group of wheels 203 is two. Multiple groups of wheel seats 201 are connected to the frame 101. In this embodiment, the number of wheel seats 201 is consistent with the number of wheels 203, both of which are two groups, and the number of each group of wheel seats 201 is two. The two wheel seats 201 in each group of wheel seats 201 are respectively located on both sides of the frame 101 and are welded to the frame 101 or connected by bolts. Each group of wheel seats 201 is rotatably connected to a wheel axle 202 through a bearing, and the wheel 203 is fixedly connected to the wheel axle 202. The two groups of wheels 203 are rotatably connected to the two groups of wheel seats 201 through the wheel axle 202 in turn.

[0054] like Figure 4 As shown, a central shaft 204 is connected between two wheels 203 in one set of wheels 203 on the frame 101. In this embodiment, the central shaft 204 is fixedly connected between the two rear wheels 203. In this embodiment, the central shaft 204 and the wheels 203 can be fixed by the cooperation of a key and a keyway. A middle pulley 205 is coaxially connected to the central shaft 204. The middle pulley 205 and the central shaft 204 are connected by the cooperation of a key and a keyway.

[0055] The vehicle frame component 1 in this embodiment also includes a top cover 102. The opening and closing detection component 3 and the top cover 102 are arranged side by side, so that the opening and closing detection component 3 and the top cover 102 are arranged side by side, one in front and one behind; the top cover 102 is installed on the top of the frame 101 and is welded or screwed to the frame 101. The inner top surface of the top cover 102 is installed with a travel motor 206. The output shaft of the travel motor 206 is connected to a drive pulley 207. A connecting belt 208 is sleeved between the drive pulley 207 and the middle pulley 205.

[0056] In this embodiment, a main controller 209 is also installed on the top cover 102. The main controller 209 is located on one side of the inner cavity of the top cover 102. The travel motor 206 and the detection probe 307 are both electrically connected to the main controller 209. The travel motor 206 can be started by the main controller 209 to drive the rotation of the driving pulley 207. The driving pulley 207 drives the middle pulley 205 to rotate through the connecting belt 208, thereby driving the middle shaft 204 to rotate, and then driving the two rear wheels 203 to rotate synchronously, thereby realizing the automatic movement of the entire detection device in the present invention.

[0057] like Figure 1 、 Figure 2 、 Figure 5-Figure 7As shown, the opening and closing detection component 3 in this embodiment includes a base frame 301 and an upper flip frame 303. The base frame 301 is connected to the vehicle frame. One end of the upper flip frame 303 is hinged to one end of the base frame 301, and the other end of the upper flip frame 303 is detachably connected to the other end of the base frame 301. The inner side of the base frame 301 and the inner side of the upper flip frame 303 are both semicircular. When the base frame 301 and the upper flip frame 303 are buckled together, the inner sides of the two form a complete circle. In this embodiment, Figure 1 Taking the angle of view after the middle bottom frame 301 and the upper flip frame 303 are buckled together as a reference, the bottom of the bottom frame 301 and the top of the upper flip frame 303 are both flat ends.

[0058] The inner side of the bottom frame 301 is provided with a bottom gear ring 305, and the inner side of the upper flip frame 303 is provided with an upper gear ring 311. After the upper flip frame 303 and the bottom frame 301 are buckled together, the bottom gear ring 305 and the upper gear ring 311 form a complete gear ring; Figure 5 As shown, in this embodiment, a bottom chute 304 is defined on the inner side of the bottom frame 301. A bottom gear ring 305 is located within the bottom chute 304 and is rotatable along the circumference of the bottom chute 304. An upper chute 310 is defined on the inner side of the upper flip frame 303. An upper gear ring 311 is located within the upper chute 310 and is rotatable along the circumference of the upper chute 310. This allows the complete gear ring formed by the bottom gear ring 305 and the upper gear ring 311 to rotate within the complete circular groove formed by the bottom chute 304 and the upper chute 310. One or more detection probes 307 are provided on the inner ring of the bottom gear ring 305 and / or the upper gear ring 311.

[0059] In another embodiment, combined with Figure 7 and Figure 8 As shown, a plurality of bottom bullet holes 320 are evenly opened on one side of the bottom frame 301 along its circumference, and a plurality of top bullet holes 321 are evenly opened on one side of the top frame 303 along its circumference. In this embodiment, the bottom bullet holes 320 and the top bullet holes 321 are respectively located on one side or both sides of the bottom chute 304 and the top chute. Figure 8 As shown, an upper side groove 312 is concentrically opened on the outer side of the upper gear ring 311, and a bottom side groove 306 is concentrically opened on the outer side of the bottom gear ring 305. The path formed by multiple bottom bullet holes 320 is arranged opposite to the bottom side groove 306, and the path formed by multiple top bullet holes 321 is arranged opposite to the upper side groove 312.

[0060] In this embodiment, the bottom bullet hole 320 and the top bullet hole 321 are both slidably inserted with a limiting unit, and the limiting unit includes a marble 322 and a sealing plate 324, and a retaining spring 323 is connected between the marble 322 and the sealing plate 324. The marble 322 in the bottom bullet hole 320 and the marble 322 in the top bullet hole 321 can be elastically slidably inserted into the bottom side groove 306 of the bottom gear ring 305 and the upper side groove 312 of the upper gear ring 311 respectively; in this embodiment, the upper side groove 312 and the bottom side groove 306 are both arc shaped groove, one end of the marble 322 inserted into the upper groove 312 and the bottom groove 306 is hemispherical. In this embodiment, the marble 322 in the limiting unit can provide a second direction of freedom restriction for the bottom groove 306 and the upper groove 312 while ensuring smooth sliding with the bottom groove 306 and the upper groove 312, so that the bottom tooth ring 305 can slide in the bottom slide groove 304 without falling off, and the upper tooth ring 311 can slide in the upper slide groove 310 without falling off.

[0061] The driving member in this embodiment is used to drive the gear ring formed by the bottom gear ring 305 and the upper gear ring 311 to rotate. Specifically: Figure 6 As shown, the driving part includes a worm wheel 314, a worm 313, a connecting gear 317, a lower gear 319 and a connecting shaft 316. The worm 313 is coaxially fixedly connected to the middle shaft 204. The worm 313 can also be combined with the middle shaft 204 to form a whole so that the middle shaft 204 has the structural characteristics of the worm 313. The bottom of the base 301 is connected to a connecting seat 315. In this embodiment, the connecting seat 315 and the base 301 are integrally formed. One end of the connecting shaft 316 is coaxially connected to the worm gear 314, and the other end of the connecting shaft 316 is rotatably connected to the connecting seat 315 through a bearing. The connecting gear 317 is coaxially connected to the connecting shaft 316. The connecting seat 315 is rotatably connected to the lower shaft 318 through a bearing. The lower gear 319 is coaxially connected to the lower shaft 318. The two sides of the lower gear 319 are respectively engaged with the connecting gear 317 and the bottom gear ring 305. In this embodiment, the connecting gear 317 and the lower gear 319 are both located on the inner side of the connecting seat 315. In this embodiment, the worm gear 314 and the worm 313 are engaged with each other.

[0062] Combine Figure 1 、 Figure 7 and Figure 9As shown, the upper fixed point assembly 4 in this embodiment includes a mounting seat 40, a handwheel 404 and a top gear 403. The mounting seat 40 is connected to the outer side of the upper flip frame 303. In this embodiment, the mounting seat 40 is located at the top of the upper flip frame 303 and is welded or integrally formed with the upper flip frame 303. A top rotating shaft 402 is rotatably connected to the mounting seat 40 through a bearing. One end of the top rotating shaft 402 is coaxially connected to the top gear 403, and the other end of the top rotating shaft 402 is coaxially connected to the handwheel 404; the top gear 403 is meshed with the upper gear ring 311; the handwheel A circle of tooth grooves 405 is provided on the outer periphery of 404. In this embodiment, the number of teeth in the tooth grooves 405 provided on the outer periphery of the handwheel 404 is multiple times greater than the number of teeth of the upper tooth ring 311. The elastic snap fit formed by the bottom locking teeth 408 on the tooth grooves 405 makes it easier to accurately adjust the opening of the upper tooth ring 311 to a position flush with the opening of the upper flip frame 303 by operating the handwheel 404; one side of the mounting seat 40 is connected to a bottom locking tooth 408 that can generate elastic deformation, and the bottom locking tooth 408 is elastically snapped into the tooth groove 405.

[0063] Specifically, a top connecting plate 406 is vertically connected to the mounting base 40 and welded to the mounting base 40. Two curved spring pieces 407 are symmetrically connected to the top connecting plate 406 via screws. Bottom latches 408 are fixed to the lower portions of the two curved spring pieces 407. The curved spring pieces 407 are outwardly curved arc structures, so that when the bottom latches 408 are squeezed, the two curved spring pieces 407 can produce upward elastic deformation. The curved spring pieces 407 in this embodiment can be made of spring pieces that can produce elastic deformation in the prior art.

[0064] Combine Figure 1 and Figure 10 As shown, in this embodiment, the locking assembly 5 is installed at one end of the detachable connection between the upper flip frame 303 and the base frame 301. Specifically, the locking assembly 5 includes a locking seat 501 and a locking spring 503. The locking seat 501 is welded to one end of the base frame 301, and a lock hole is provided on the locking seat 501.

[0065] The locking spring piece 503 is connected to one end of the upper flip frame 303, and the side of the locking spring piece 503 facing the lock hole is vertically connected to the locking column 504. The locking column 504 can be welded to the locking spring piece 503. The locking spring piece 503 can produce elastic deformation and can be made of the spring sheet material in the existing technology.

[0066] In this embodiment, a movable plate 502 is vertically welded to the upper flip frame 303, and the movable plate 502 and the locking seat 501 are staggered, that is, the two are not on the same vertical line. The locking spring piece 503 includes a first flat plate, an inclined plate and a second flat plate. One end of the first flat plate is connected to the movable plate 502, and the other end of the first flat plate is connected to the inclined plate. The inclined plate is tilted, and one end of the second flat plate is connected to the end of the inclined plate away from the first flat plate, and the first flat plate and the second flat plate are parallel to each other, so that the locking spring piece 503 forms a shape similar to a Z shape. In this embodiment, the first flat plate, the inclined plate and the second flat plate are integrally formed or welded to each other; the clamping column 504 is vertically welded to the end face of the second flat plate facing the lock hole.

[0067] After the upper flip frame 303 is engaged with the bottom frame 301, the latch 504 can be elastically locked in the lock hole to achieve a detachable connection between the upper flip frame 303 and the bottom frame 301. During the process of the upper flip frame 303 and the bottom frame 301 being engaged with each other, the end of the latch 504 will interfere with the top of the locking seat 501. Since the locking spring 503 can be deformed, the latch 504 can pass over the locking seat 501 and elastically lock into the lock hole to achieve the connection between the upper flip frame 303 and the bottom frame 301. When it is necessary to open the upper flip frame 303, the latch 504 can be disengaged from the locking seat 501 by pushing the locking spring 503 outward.

[0068] like Figure 7 As shown, a fixed seat 3021 is welded to one end of the base frame 301, and a side rotating seat 302 is welded to one end of the upper flip frame 303. The fixed seat 3021 and the side rotating seat 302 and the locking assembly 5 are located on both sides of two pairs. The fixed seat 3021 is inserted into the side rotating seat 302, and the side rotating seat 302 and the fixed seat 3021 are rotatably connected through an axis and a bearing, thereby realizing a hinged setting of the upper flip frame 303 and the base frame 301.

[0069] As the wheel 203 rotates, the device of the present invention travels along the natural gas pipeline, synchronously driving the rotation of the worm 313. The worm 313 forms a transmission connection with the lower gear 319, driving the rotation of the bottom gear ring 305 and the upper gear ring 311 to form a complete set of gear rings, thereby driving the detection probe 307 to rotate in a circular manner relative to the natural gas pipeline. The detection probe 307 can be used for local or point detection. For local detection, one or more detection probes 307 can be deployed, while for point detection, multiple detection probes 307 are deployed to ensure detection accuracy. In this embodiment, to improve the detection accuracy of the detection probe 307 for methane leaks in the natural gas pipeline, multiple detection probes 307 are provided. These multiple detection probes 307 are circumferentially distributed within the inner rings of the bottom gear ring 305 and the upper gear ring 311, thereby achieving multi-point coverage of the outer wall of the natural gas pipeline. As the device of the present invention travels forward, the circular rotation of the detection probe 307 forms a dynamic spiral detection, enabling high-precision methane leak detection in the natural gas pipeline.

[0070] In another embodiment, Figure 7 As shown, the inner side of the bottom frame 301 is connected to the positioning touch switch 308, and the inner side of the bottom gear ring 305 is connected to the positioning touch panel 309. Figure 7 Taking the direction shown as a reference, in this embodiment, the positioning touch switch 308 is located on the left side of the base frame 301 and close to its upper end surface, and the positioning touch plate is located on the left side of the bottom gear ring 305 and close to its upper end surface.

[0071] After the bottom gear ring 305 rotates until its top surface overlaps with the top surface of the bottom frame 301 , the positioning touch panel 309 can touch the positioning touch switch 308 , and the positioning touch switch 308 is electrically connected to the main controller 209 .

[0072] like Figure 7 As shown, in another embodiment, as a preferred manner, the inner ring of the bottom gear ring 305 in this embodiment is connected to a flexible ball 325. After the base frame 301 and the upper flip frame 303 are buckled onto the outer wall of the natural gas pipeline, there is a distance between the flexible ball 325 and the outer wall of the natural gas pipeline. That is, after the device of the present invention is facing the natural gas pipeline, the flexible ball 325 maintains a certain safe distance from the outer wall of the natural gas pipeline, and the height of the flexible ball 325 in this embodiment is greater than the height of the detection probe 307.

[0073] In this embodiment, the shape path of the present invention can be corrected. When the device of the present invention deviates in its travel, the flexible ball 325 can collide with the outer wall of the natural gas pipeline to adjust the entire device to the travel path along the natural gas pipeline.

[0074] The specific implementation process is as follows:

[0075] When the upper frame 303 and the bottom frame 301 are in an open state, the device of the present invention can be placed on the lower side of the natural gas pipeline so that the set of wheels 203 can roll in contact with the ground below the natural gas pipeline.

[0076] Before the upper flip frame 303 and the bottom frame 301 are closed, the bottom gear ring 305 and the upper gear ring 311 need to be adjusted to a position flush with the opening surfaces of the bottom frame 301 and the upper flip frame 303 .

[0077] As the upper frame 303 and the bottom frame 301 are closed into place, the bottom gear ring 305 and the upper gear ring 311 form a complete set of gear rings, and the inner diameter of the complete gear ring formed by the bottom gear ring 305 and the upper gear ring 311 is larger than the outer diameter of the natural gas pipeline.

[0078] Before the device of the present invention is tested, the upper flip frame 303 and the bottom frame 301 are in the open state. At this time, by starting the travel motor 206, the central shaft 204 is driven to rotate, and the bottom gear ring 305 can be leveled separately. The central shaft 204 drives the rotation of the worm 313. The worm 313 cooperates with the worm wheel 314. The worm wheel 314 coaxially drives the connecting gear 317 to rotate through the connecting shaft 316. The connecting gear 317 cooperates with the lower gear 319, thereby driving the rotation of the bottom gear ring 305, and adjusting the opening of the bottom gear ring 305 to a position flush with the opening at the upper end of the bottom frame 301. At this time, the positioning touch panel 309 just touches the positioning touch switch 308, which can stop the travel motor 206 and stop the rotation of the central shaft 204.

[0079] Subsequently, the hand wheel 404 is turned, and the hand wheel 404 drives the top gear 403 to rotate coaxially through the top rotating shaft 402. The top gear 403 forms a transmission with the upper gear ring 311, thereby driving the rotation of the upper gear ring 311. Since the number of teeth of the tooth groove 405 is greater than that of the upper gear ring 311, the elastic engagement formed by the bottom locking teeth 408 on the tooth groove 405 can accurately adjust the opening of the upper gear ring 311 to a position flush with the opening of the upper flip frame 303.

[0080] After adjusting the positions of the upper gear ring 311 and the bottom gear ring 305, close the upper flip frame 303 and the bottom frame 301 in place, so that the opening of the upper gear ring 311 overlaps with the opening of the bottom gear ring 305 to form a complete set of gear rings;

[0081] At this time, by pushing the locking spring piece 503 outward, the locking column 504 is aligned with the locking hole and locked in the locking hole of the locking base 501. When it is necessary to open the upper flip frame 303, the locking spring piece 503 is pushed outward to disengage the locking column 504 from the locking base 501.

[0082] Subsequently, the travel motor 206 is started again to drive the central shaft 204 to rotate. On the one hand, it drives the device of the present invention to move along the natural gas pipeline. On the other hand, the central shaft 204 drives the rotation of the lower gear 319 through the transmission mechanism, thereby driving the overall gear ring formed by the bottom gear ring 305 and the upper gear ring 311 to rotate, thereby driving the detection probe 307 to rotate in a circular manner based on the natural gas pipeline.

[0083] It should be noted that the above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0084] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0085] In the description of this document, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only used to illustrate the relative position relationship between the various components or components, and do not particularly limit the specific installation orientation of the various components or components.

[0086] In the descriptions of this document, some terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0087] In this document, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0088] The structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in this technical briefing document for those skilled in the art to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0089] The terms used in this document are those commonly used in the art currently in consideration of the functions of the present disclosure, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the document should not be understood as simple names, but rather as a general description based on the meaning of the terms and the present disclosure.

[0090] Flowcharts or text are used in this document to illustrate the operational steps performed according to the embodiments of the present application. It should be understood that the operational steps in the embodiments of the present application are not necessarily performed in the exact order in which they are described. Instead, the various steps may be processed in reverse order or simultaneously, as needed. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0091] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A natural gas pipeline methane leak detection device, characterized in that: It includes a vehicle frame, wheel assembly, opening and closing detection components and drive parts; The opening and closing detection assembly is located on the vehicle frame, and the wheel assembly is mounted on the vehicle frame and is capable of driving the vehicle frame assembly forward; The opening and closing detection assembly includes a bottom frame and an upper flip frame, the bottom frame is connected to the vehicle frame, one end of the upper flip frame is hinged to one end of the bottom frame, and the other end of the upper flip frame is detachably connected to the other end of the bottom frame, and the inner sides of the bottom frame and the inner sides of the upper flip frame are both semicircular; A bottom gear ring is provided on the inner side of the base frame, and an upper gear ring is provided on the inner side of the upper flip frame. After the upper flip frame and the base frame are buckled with each other, the bottom gear ring and the upper gear ring form a complete gear ring; the inner ring of the bottom gear ring and / or the upper gear ring is provided with one or more detection probes; the driving member is used to drive the gear ring formed by the bottom gear ring and the upper gear ring to rotate.

2. A natural gas pipeline methane leak detection device according to claim 1, characterized in that: The vehicle frame includes a frame, the wheel group components include multiple groups of wheels, each group of wheels has two wheels, multiple groups of wheel seats are connected to the frame, each group of wheel seats has two wheels, the two wheel seats in each group of wheel seats are respectively located on both sides of the frame, each group of wheel seats is rotatably connected to a wheel axle, and the multiple groups of wheels are in turn rotatably connected to the multiple groups of wheel seats through the wheel axles.

3. A natural gas pipeline methane leak detection device according to claim 2, characterized in that: A central shaft is connected between two wheels in one set of wheels on the frame, and a middle pulley is coaxially connected to the central shaft; The frame component also includes a top cover, and the opening and closing detection component and the top cover are arranged side by side; the top cover is installed at the top of the frame, and a travel motor is installed on the inner top surface of the top cover. The output shaft of the travel motor is connected to a drive pulley, and a connecting belt is connected between the drive pulley and the middle pulley.

4. A natural gas pipeline methane leak detection device according to claim 2, characterized in that: A main controller is installed on the top cover, and the travel motor and the detection probe are both electrically connected to the main controller.

5. A natural gas pipeline methane leak detection device according to claim 3, characterized in that: The driving member includes a worm wheel, a worm, a connecting gear, a lower gear and a connecting shaft. The worm is coaxially connected to the middle shaft. The bottom of the base is connected to a connecting seat. One end of the connecting shaft is coaxially connected to the worm wheel, and the other end of the connecting shaft is rotatably connected to the connecting seat. The connecting gear is coaxially connected to the connecting shaft. The connecting seat is rotatably connected to the lower shaft. The lower gear is coaxially connected to the lower shaft. The two sides of the lower gear are respectively meshed with the connecting gear and the bottom gear ring, and the worm wheel is meshed with the worm.

6. A natural gas pipeline methane leak detection device according to any one of claims 1 to 5, characterized in that: A bottom slide groove is provided on the inner side of the bottom frame, the bottom gear ring is located in the bottom slide groove and can rotate circumferentially along the bottom slide groove, and an upper slide groove is provided on the inner side of the upper flip frame, the upper gear ring is located in the upper slide groove and can rotate circumferentially along the upper slide groove.

7. A natural gas pipeline methane leak detection device according to claim 6, characterized in that: A plurality of bottom bullet holes are formed on one side of the bottom frame along its circumference, a plurality of top bullet holes are formed on one side of the upper flip frame along its circumference, an upper side groove is formed concentrically on the outer side of the upper gear ring, and a bottom side groove is formed concentrically on the outer side of the bottom gear ring, a path formed by the plurality of bottom bullet holes is arranged opposite to the bottom side groove, and a path formed by the plurality of top bullet holes is arranged opposite to the upper side groove; A limiting unit is slidably inserted into the bottom bullet hole and the top bullet hole. The limiting unit includes a marble and a sealing plate. A retaining spring is connected between the marble and the sealing plate. The marble in the bottom bullet hole and the marble in the top bullet hole can be elastically slidably inserted into the bottom side groove and the upper side groove respectively.

8. A natural gas pipeline methane leak detection device according to claim 7, characterized in that: The upper groove and the bottom groove are both arc-shaped grooves, and the end of the marble inserted into the upper groove and the bottom groove is hemispherical.

9. A natural gas pipeline methane leak detection device according to claim 1, characterized in that: It also includes an upper fixed-point component, which includes a mounting seat, a handwheel and a top gear. The mounting seat is connected to the outside of the upper flip frame. A top rotating shaft is rotatably connected to the mounting seat. One end of the top rotating shaft is coaxially connected to the top gear, and the other end of the top rotating shaft is coaxially connected to the handwheel; the top gear is meshed with the upper gear ring; a circle of tooth grooves is provided on the outer periphery of the handwheel; one side of the mounting seat is connected to a bottom clamping tooth that can produce elastic deformation, and the bottom clamping tooth is elastically clamped in the tooth groove.

10. A natural gas pipeline methane leak detection device according to claim 9, characterized in that: The mounting seat is connected to a top connecting plate, and two arc-shaped spring pieces are symmetrically connected to the top connecting plate. The arc-shaped spring pieces are arc structures bent outward, and the bottom locking teeth are fixed to the lower parts of the two arc-shaped spring pieces.

11. A natural gas pipeline methane leak detection device according to claim 1, characterized in that: It also includes a locking assembly, the locking assembly including a locking seat and a locking spring, the locking seat is connected to one end of the base frame, and a locking hole is formed on the locking seat; The locking spring is connected to one end of the upper flip frame, and a locking column is connected to the side of the locking spring facing the lock hole. The locking spring can produce elastic deformation. After the upper flip frame is buckled with the bottom frame, the locking column can be elastically locked in the lock hole to realize the detachable connection between the upper flip frame and the bottom frame.

12. A natural gas pipeline methane leak detection device according to claim 11, characterized in that: A movable plate is connected to the upper flip frame, and the movable plate and the locking seat are staggered. The locking spring includes a first plate, an inclined plate and a second plate. One end of the first plate is connected to the movable plate, and the other end of the first plate is connected to the inclined plate. The inclined plate is tilted, and one end of the second plate is connected to an end of the inclined plate away from the first plate, and the first plate and the second plate are parallel to each other; the card column is connected to the second plate.

13. A natural gas pipeline methane leak detection device according to claim 1, characterized in that: One end of the bottom frame is connected to a fixed seat, one end of the upper flip frame is connected to a side swivel seat, the fixed seat is inserted into the side swivel seat, and the side swivel seat is rotatably connected to the fixed seat.

14. A natural gas pipeline methane leak detection device according to claim 4, characterized in that: A positioning touch switch is connected to the inner side of the base frame, and a positioning touch pad is connected to the inner side of the bottom gear ring. After the bottom gear ring rotates until its top surface coincides with the top surface of the base frame, the positioning touch pad can touch the positioning touch switch, and the positioning touch switch is electrically connected to the main controller.

15. The natural gas pipeline methane leak detection device according to claim 1, characterized in that: The inner ring of the bottom gear ring is connected with a flexible ball. After the bottom frame and the upper flip frame are buckled on the outer wall of the natural gas pipeline, there is a distance between the flexible ball and the outer wall of the natural gas pipeline. The height of the flexible ball is greater than the height of the detection probe.

16. A natural gas pipeline methane leak detection device according to claim 1, characterized in that: There are multiple detection probes, and the multiple detection probes are circumferentially distributed in the inner rings of the bottom gear ring and the upper gear ring.

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