Gas leakage detection device for natural gas pipeline

Abstract

The utility model relates to the technical field of gas leakage detection, in particular to a gas leakage detection device for a natural gas pipeline. Comprising two symmetrically-arranged detection units, the two detection units form an annular detection assembly, each detection unit comprises an arc-shaped plate, a plurality of sliding rods are evenly distributed on the arc-shaped plate in the circumferential direction, natural gas detectors are fixed to the ends, facing a pipeline, of the sliding rods, a pull rod is fixed to one end of the arc-shaped plate, and a rotating rod is rotationally connected to the other end of the arc-shaped plate; a guide wheel is rotationally connected to the arc-shaped plate between every two adjacent sliding rods, a stop rod is fixed to the end, away from the pipeline, of each sliding rod, one end of a pull rope is fixedly connected with the pull rod, the other end of the pull rope sequentially bypasses the upper end of the stop rod and the lower end of the guide wheel and then is fixedly connected with the rotating rod, and a supporting unit is arranged on the arc-shaped plate. The detection device can carry out air leakage detection on the circumference of the pipeline at a time when the outer side of the pipeline moves in the axial direction of the pipeline, and the detection efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas leakage detection technical field, concretely relates to a natural gas pipeline gas leakage detection device. BACKGROUND

[0002] Natural gas is mainly transported through pipeline in the transportation process, and there will be pipeline leakage and other phenomena when transported through the pipeline, and there is no inspection device after the pipeline leaks at present, so that a large amount of fuel gas runs into the air, not only wastes resources, but also pollutes the environment.

[0003] The patent file with the publication number CN218914581U discloses a natural gas pipeline gas leakage detection device, which comprises: a semicircular arc walking plate, a through slot is formed in the length direction of the plate surface, and an arc-shaped guide slot is formed in the side surface; The inner side of the semicircular arc walking plate is provided with a ring-shaped tooth; Two groups of walking structures are respectively rotatably arranged at the two ends of the semicircular arc walking plate and are elastically limited by two groups of limiting devices respectively, so that the walking wheels are in abutment with the surface of the natural gas pipeline; An n-shaped frame is fixedly provided with a guide rod on both sides of the inside, which is in sliding cooperation with the guide slot; A first motor is fixedly arranged on one side of the n-shaped frame; A gear is in transmission connection with the output shaft of the first motor; The gear is in meshing with the ring-shaped tooth; An ultrasonic sensor is arranged at the bottom of the top plate of the n-shaped frame and is located in the through slot, and is used for gas leakage detection towards the surface of the natural gas pipeline. When detecting the gas leakage of the pipeline, the whole device has two types of walking structures, one is the walking structure, which is arranged on both sides of the pipeline and walks along the axial direction of the pipeline; The other is to carry the detector (ultrasonic sensor), which walks along the circumferential direction of the pipeline. These two detection modes constitute a scanning state, which can comprehensively and accurately obtain the gas leakage condition of the pipeline surface. Further, in order to realize stable walking, the device is provided with an elastic limiting component at the end of the walking structure, so that the walking wheel always keeps in close contact with the surface of the natural gas pipeline, avoiding falling off; The walking range of the n-shaped frame is controlled by the pressure sensor and the elastic limiting sheet, and the position auxiliary servo is further realized. The above detection scheme completely replaces manual work and actively detects and scans, effectively improving the detection efficiency. Since the device is arranged around the outside of the pipeline, it is easy to cause missed detection during detection. In order to detect the pipeline completely, the device needs to change the outer position of the pipeline and then move along the axial direction of the pipeline, so the detection efficiency is low.

[0004] The patent document with the publication number CN221424635U discloses a natural gas pipeline leakage monitoring device, which is characterized in that the first clamping cover and the second clamping cover are arranged at the flange plates connected with the two pipeline bodies, then the first clamping cover and the second clamping cover are closed, the limiting clamping strips are clamped with the edges of the flange plates, and the sealing rubber strips are abutted with the outer walls of the pipeline bodies, when the flange plates leak natural gas, the gas enters the inside of the box through the through holes, and is detected by the detector. Utility model content

[0005] The main purpose of the utility model is to provide a natural gas pipeline leakage detection device which can comprehensively detect the pipeline during movement and improve the detection efficiency.

[0006] In order to achieve the above purpose, the utility model provides a technical scheme:

[0007] A natural gas pipeline leakage detection device, comprising two symmetrical detection units, the two detection units are detachably fixedly connected, the detection unit is arc-shaped as a whole, the two detection units form a circular ring-shaped detection assembly, the detection unit comprises an arc-shaped plate, a plurality of slide rods are uniformly arranged on the circumference of the arc-shaped plate, the slide rod is spline-connected with the arc-shaped plate, one end of the slide rod towards the pipeline is fixedly provided with a natural gas detector, the slide rod is elastically connected with the arc-shaped plate, one end of the arc-shaped plate is fixedly provided with a pull rod, the other end of the arc-shaped plate is rotatably connected with a rotating rod, a guide wheel is rotatably connected to the arc-shaped plate between the adjacent two slide rods, one end of the slide rod away from the pipeline is fixedly provided with a blocking rod, one end of a pull rope is fixedly connected with the pull rod, the other end of the pull rope is sequentially wound around the upper end of the blocking rod and the lower end of the guide wheel and then fixedly connected with the rotating rod, a supporting unit is arranged on the arc-shaped plate, the supporting unit comprises a fixed rod, a top rod is elastically and slidably arranged at the two ends of the fixed rod, a universal ball is rotatably connected to one end of the top rod towards the pipeline, wedge blocks are fixedly arranged at the two ends of the top rod in the axial direction of the pipeline, the wedge blocks are located inside the arc-shaped plate, one end of the wedge block towards the pipeline is flush with one end of the top rod towards the pipeline, the end faces of the two wedge blocks on the same top rod opposite to each other are inclined surfaces, and the upper end of the inclined surface is inclined to the outside of the top rod.

[0008] Specifically, the slide rod and the arc-shaped plate are connected through a first spring.

[0009] Specifically, both ends of one of the arc-shaped plates are fixedly provided with plug-in plates, both ends of the other arc-shaped plate are fixedly provided with fixed sleeves, lock bolts are threadedly connected to the fixed sleeves, the plug-in plates are inserted into the fixed sleeves on one side of the two arc-shaped plates after the two arc-shaped plates form a circular ring, and the plug-in plates in the fixed sleeves can be locked by rotating the lock bolts.

[0010] Specific, the rotating rod is fixed with a gear concentrically.

[0011] Specific, any rotating rod is fixed with a handle.

[0012] Specific, any arc-shaped plate is fixed with a fixed plate, and a positioning bolt is threadedly connected to the fixed plate, and the positioning bolt can abut against and stop rotation of the gear on one side.

[0013] Specific, the top rod is connected to the arc-shaped plate through a second spring at an end away from the pipeline.

[0014] Specific, one of the natural gas detectors on the arc-shaped plate is directly electrically connected with the controller, the buzzer and the power supply, and the other natural gas detectors on the arc-shaped plate are electrically connected with the controller, the buzzer and the power supply through switches, and the switches, the controller, the buzzer and the power supply are fixed on the arc-shaped plate.

[0015] Specific, one of the natural gas detectors on the arc-shaped plate is directly electrically connected with the controller, the buzzer and the power supply.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1、The two arc-shaped plates of the device constitute a circular ring structure, and the plurality of natural gas detectors can comprehensively detect the outer periphery of the pipeline.

[0018] 2、The wedge is provided, and after the wedge contacts the flange on the pipeline, the wedge can slide to the outside of the arc-shaped plate under the guidance of the inclined surface of the wedge.

[0019] 3、Since one of the natural gas detectors on the arc-shaped plate is directly electrically connected with the controller, the buzzer and the power supply, when the buzzer alarms during the movement of the detection device along the axial direction of the pipeline, the switch on one of the arc-shaped plates is closed and the power supply on the other arc-shaped plate is disconnected, so that only one natural gas detector in the detection device works. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic view of the detection device.

[0021] Figure 2 It is a schematic view of two arc-shaped plate split structure.

[0022] Figure 3 It is a schematic view of the upper arc-shaped plate.

[0023] Figure 4 It is a schematic view of the lower arc-shaped plate.

[0024] Figure 5 It is a schematic view of the connection of the natural gas detector on the arc-shaped plate and the power supply, controller, buzzer and switch.

[0025] The names of the components in the drawings are: 1, arc-shaped plate, 2, slide bar, 3, stop bar, 4, guide wheel, 5, pull rope, 6, natural gas detector, 7, first spring, 8, rotating rod, 9, gear, 10, handle, 11, fixed plate, 12, positioning bolt, 13, plug plate, 14, fixed sleeve, 15, locking bolt, 16, fixed rod, 17, top rod, 18, second spring, 19, wedge block, 20, universal ball, 21, pull rod, 22, pipeline, 23, power supply, 24, buzzer, 25, controller, 26, switch. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0027] Embodiment one: refer to Figures 1-4 As shown in the drawings, a natural gas pipeline leakage detection device includes two symmetrically arranged detection units, the two detection units are detachably fixedly connected, the detection unit as a whole is arc-shaped, and the two detection units constitute a circular ring-shaped detection assembly.

[0028] The detection unit includes an arc-shaped plate 1, both ends of one of the arc-shaped plates 1 are fixedly connected with plug plates 13, both ends of the other arc-shaped plate 1 are fixedly connected with fixed sleeves 14, locking bolts 15 are threadedly connected to the fixed sleeves 14, the plug plates 13 are inserted into the fixed sleeves 14 on one side of the two arc-shaped plates 1 after the two arc-shaped plates 1 form a circular ring, and the plug plates 13 in the fixed sleeves 14 can be locked by rotating the locking bolts 15.

[0029] A plurality of slide bars 2 are arranged on the circumference of the arc-shaped plate 1, the slide bars 2 are spline-connected with the arc-shaped plate 1, one end of each of the slide bars 2 towards the pipeline 22 is fixedly connected with a natural gas detector 6, and the slide bars 2 are elastically connected with the arc-shaped plate 1. Specifically, the slide bars 2 are connected with the arc-shaped plate 1 through first springs 7.

[0030] The arc-shaped plate 1 has a pull rod 21 fixed at one end, and a rotating rod 8 rotatably connected at the other end. The arc-shaped plate 1 between two adjacent slide rods 2 has a guide wheel 4 rotatably connected. The slide rod 2 has a blocking rod 3 fixed at the end away from the pipeline 22. The pull rope 5 has one end fixedly connected with the pull rod 21, and the other end fixedly connected with the rotating rod 8 after passing through the upper end of the blocking rod 3 and the lower end of the guide wheel 4.

[0031] The rotating rod 8 has a gear 9 fixedly connected concentrically. The two gears 9 are engaged after the two arc-shaped plates 1 form a ring. The rotating rod 8 has a handle 10 fixedly connected.

[0032] The arc-shaped plate 1 has a fixed plate 11 fixedly connected, and the fixed plate 11 has a positioning bolt 12 threadedly connected. The positioning bolt 12 can tightly abut against and stop rotation of the gear 9 on one side.

[0033] The arc-shaped plate 1 is provided with a supporting unit, which includes a fixed rod 16, and the fixed rod 16 has a top rod 17 elastically and slidably arranged at both ends. Specifically, the top rod 17 has one end connected with the arc-shaped plate 1 through a second spring 18 away from the pipeline 22.

[0034] The top rod 17 has a universal ball 20 rotatably connected at the end towards the pipeline 22.

[0035] When the pipeline 22 is detected for gas leakage, the two arc-shaped plates 1 are connected to form a ring. The pipeline 22 is located inside the ring. When the two arc-shaped plates 1 are connected, the plug plate 13 is inserted into the fixed sleeve 14 on one side, and then the locking bolt 15 is rotated to stabilize the plug plate 13 in the fixed sleeve 14. At this time, the universal ball 20 is in rolling contact with the outer edge of the pipeline 22, and the pipeline 22 is centrally located in the middle of the ring under the elastic force of the second spring 18.

[0036] After the two arc-shaped plates 1 form a ring, the two gears 9 are engaged, and when one of the gears 9 is rotated by the handle 10, the other gear 9 is rotated, that is, when one of the rotating rods 8 is rotated, the other rotating rod 8 is synchronously rotated.

[0037] When the rotating rod 8 is rotated, the pull rope 5 is wound on the rotating rod 8, and the pull rope 5 is gradually tightened. In the process of gradually tightening the pull rope 5, the slide rod 2 moves towards the pipeline 22, and the first spring 7 is stretched to store energy. When the distance between the natural gas detector 6 and the pipeline 22 reaches a suitable detection distance, the positioning bolt 12 is rotated to stop rotation of one of the gears 9, and the natural gas detector 6 is positioned.

[0038] The detection device moves along the axial direction of the pipeline 22, and the plurality of natural gas detectors 6 evenly arranged on the circumference of the detection device can perform comprehensive gas leakage detection on the outer circumference of the pipeline 22 at one time.

[0039] Example two: on the basis of example one, referring to Figures 1-4As shown in the drawings, the wedge block 19 is fixed at both ends of the jacking rod 17 in the axial direction of the pipeline 22, and is located inside the arc-shaped plate 1, and the end of the wedge block 19 towards the pipeline 22 is flush with the end of the jacking rod 17 towards the pipeline 22, and the end faces of the two wedge blocks 19 on the same jacking rod 17 opposite to each other are inclined surfaces, and the upper end of the inclined surface is inclined to the outside of the jacking rod 17.

[0040] When the inclined surface of the wedge block 19 contacts the flange during the movement of the detection device outside the pipeline 22, the sliding rod 2 moves away from the pipeline 22 under the guidance of the inclined surface of the wedge block 19 as the detection device continues to move in the axial direction of the pipeline 22. Therefore, the jacking rod 17 can pass the flange during the movement of the detection device in the axial direction of the pipeline 22, and the continuous gas leakage detection of the pipeline 22 can be realized.

[0041] Embodiment three: based on embodiment one, referring to Figures 1-5 As shown in the drawings, one of the natural gas detectors 6 on the arc-shaped plate 1 is directly electrically connected with the controller 25, the buzzer 24 and the power supply 23, and the other natural gas detectors 6 on the arc-shaped plate 1 are electrically connected with the controller 25, the buzzer 24 and the power supply 23 through the switch 26, and the switch 26, the controller 25, the buzzer 24 and the power supply 23 are fixed on the arc-shaped plate 1. Specifically, one of the natural gas detectors 6 at the middle position of the arc-shaped plate 1 is directly electrically connected with the controller 25, the buzzer 24 and the power supply 23.

[0042] In this embodiment, the natural gas detector 6 is selected as the UGT-C5 natural gas sensor produced by the British Gas Shield Company.

[0043] In order to accurately detect the leakage point of the pipeline 22, all the natural gas detectors 6 are turned on during the movement of the detection device in the axial direction of the pipeline 22, and when the natural gas detector 6 detects the natural gas leakage, the buzzer 24 gives an alarm, and at this time, the leakage point of the pipeline 22 can be located in the axial direction of the pipeline 22. Then, one of the switches 26 on the arc-shaped plate 1 is turned off and the power supply 23 on the other arc-shaped plate 1 is disconnected, so that only one natural gas detector 6 in the detection device works. In this embodiment, the natural gas detector 6 at the middle position of the upper arc-shaped plate 1 is in the working state. Then, the detection device is rotated in the circumferential direction of the pipeline 22, and when the buzzer 24 sounds again during the rotation of the detection device in the circumferential direction of the pipeline 22, the position of the pipeline 22 corresponding to the natural gas detector 6 in the working state is the leakage area, and the detection device can accurately find the leakage point and has high detection efficiency.

[0044] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A natural gas pipeline leakage detection device, comprising two symmetrical detection units, the two detection units are detachably fixedly connected, the detection units are in an overall arc shape, and the two detection units form a circular ring-shaped detection assembly, characterized in that, The detection unit comprises an arc-shaped plate (1), a plurality of slide rods (2) are uniformly arranged on the arc-shaped plate (1) in a circumferential direction, the slide rods (2) are in spline connection with the arc-shaped plate (1), a natural gas detector (6) is fixed to one end of each slide rod (2) which is directed towards a pipeline (22), the slide rods (2) are in elastic connection with the arc-shaped plate (1), a pull rod (21) is fixed to one end of the arc-shaped plate (1), a rotating rod (8) is rotatably connected to the other end of the arc-shaped plate (1), a guide wheel (4) is rotatably connected to the arc-shaped plate (1) between any two adjacent slide rods (2), a blocking rod (3) is fixed to the end of each slide rod (2) which is away from the pipeline (22), a pull rope (5) is fixedly connected to the pull rod (21) at one end, the pull rope (5) is sequentially wound around the upper end of the blocking rod (3) and the lower end of the guide wheel (4) and then fixedly connected to the rotating rod (8) at the other end, a supporting unit is arranged on the arc-shaped plate (1), the supporting unit comprises a fixed rod (16), a top rod (17) is elastically and slidably arranged at each end of the fixed rod (16), a universal ball (20) is rotatably connected to one end of the top rod (17) which is directed towards the pipeline (22), a wedge block (19) is fixed to each end of the top rod (17) in the axial direction of the pipeline (22), the wedge block (19) is located on the inner side of the arc-shaped plate (1), one end of the wedge block (19) which is directed towards the pipeline (22) is flush with one end of the top rod (17) which is directed towards the pipeline (22), the end faces of the two wedge blocks (19) on the same top rod (17) which are opposite to each other are inclined surfaces, and the upper end of each inclined surface is inclined outwardly relative to the top rod (17).

2. The natural gas pipeline leak detection apparatus of claim 1, wherein, The slide rod (2) is connected with the arc-shaped plate (1) through a first spring (7).

3. The natural gas pipeline leak detection apparatus of claim 1, wherein, Both ends of one of the arc-shaped plates (1) are fixedly connected with a plug plate (13), both ends of the other arc-shaped plate (1) are fixedly connected with a fixed sleeve (14), a locking bolt (15) is threadedly connected to the fixed sleeve (14), the plug plate (13) is inserted into the fixed sleeve (14) on one side of the arc-shaped plate (1) after the two arc-shaped plates (1) are combined to form a ring, and the locking bolt (15) can lock the plug plate (13) in the fixed sleeve (14).

4. The natural gas pipeline leak detection apparatus of claim 1, wherein, The rotating rod (8) is fixedly connected with a gear (9) in a concentric manner.

5. The natural gas pipeline leak detection apparatus of claim 1, wherein, A handle (10) is fixed to any rotating rod (8).

6. The natural gas pipeline leak detection apparatus of claim 1, wherein, A fixed plate (11) is fixed to any arc-shaped plate (1), a positioning bolt (12) is threadedly connected to the fixed plate (11), and the positioning bolt (12) can abut against and stop rotation of the gear (9) on one side of the gear (9).

7. The natural gas pipeline leak detection apparatus of claim 1, wherein, The top rod (17) is connected with the arc-shaped plate (1) through a second spring (18) at the end which is away from the pipeline (22).

8. The natural gas pipeline leak detection apparatus of claim 1, wherein, One of the natural gas detectors (6) on the arc-shaped plate (1) is directly electrically connected with a controller (25), a buzzer (24) and a power supply (23), and the other natural gas detectors (6) on the arc-shaped plate (1) are electrically connected with the controller (25), the buzzer (24) and the power supply (23) through a switch (26), and the switch (26), the controller (25), the buzzer (24) and the power supply (23) are fixed on the arc-shaped plate (1).

9. The natural gas pipeline leak detection apparatus of claim 8, wherein, One of the natural gas detectors (6) at the middle position of the arc-shaped plate (1) is directly electrically connected with the controller (25), the buzzer (24) and the power supply (23).

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