Natural gas leakage detection device

Abstract

The utility model discloses a natural gas leakage detection device which comprises a natural gas pipeline, a large sealing cavity is fixedly connected above the natural gas pipeline, and the utility model relates to the technical field of leakage detection. According to the natural gas leakage detection device, by arranging the large sealing cavity, when natural gas leaks seriously, the internal pressure of a natural gas pipeline is small, so that a spring telescopic rod drives a baffle to seal a gas inlet, then a lifting plate moves downwards to enable the natural gas in the large sealing cavity to eject a pressure release valve on the baffle, and safety accidents caused by continuous leakage are prevented; according to the natural gas leakage detection device, two groups of forward wheels are driven by a motor to rotate, and when a circular ring moves to a leakage point, natural gas jacks a small sealing cavity to rise and then pulls a sliding plate, so that a first transmission gear is separated from a second transmission gear, and the circular ring stops moving to block the leakage point on the outer wall of a natural gas pipeline; and a worker can determine a leakage place by observing the position of the circular ring.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage detection, in particular to a natural gas leakage detection device. Background Art

[0002] Natural gas refers to all gases that exist naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere (including oilfield gas, gasfield gas, mud volcano gas, coalbed methane, and biogenic gas, etc.). The definition of "natural gas" that people have long used is a narrow definition from the perspective of energy, which refers to a mixture of hydrocarbons and non-hydrocarbon gases naturally stored in the strata. In petroleum geology, it usually refers to oilfield gas and gasfield gas. Its composition is mainly hydrocarbons and contains non-hydrocarbon gases. Natural gas leaks generally occur in pipelines. Natural gas leaks are caused by pipeline damage. At this time, a natural gas leak detection device is needed. However, the current natural gas leak detection device still has some shortcomings, such as the inability to shut down the pipeline in time when natural gas leaks, and the inability to detect and stop the leak in time when a small leak occurs in the pipeline. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a natural gas leakage detection device, which solves the problem of leakage detection.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a natural gas leakage detection device, including a natural gas pipeline, a large sealed cavity is fixedly connected to the top of the natural gas pipeline, two groups of spring telescopic rods are fixedly connected to the inside of the large sealed cavity, a baffle is fixedly connected to the upper surface of the spring telescopic rod, an air inlet is opened inside the large sealed cavity, a sealing plate is rotatably connected to one end of the natural gas pipeline, a circular ring is slidably connected to the outer wall of the natural gas pipeline, a small sealed cavity is fixedly connected to the top of the circular ring, a piston head is slidably connected to the inside of the small sealed cavity, a long rod is fixedly connected to the top of the piston head, a prismatic block is fixedly connected to one end of the circular ring, and a secondary transmission shaft is rotatably connected to the inside of the prismatic block.

[0005] Preferably, a lifting plate is slidably connected inside the large sealed cavity, a long column is fixedly connected above the lifting plate, a threaded buckle is rotatably connected above the large sealed cavity, a transfer shaft is rotatably connected to one end of the large sealed cavity, and a first V-belt is rotatably connected between the transfer shaft and the sealing plate.

[0006] Preferably, a support column is fixedly connected to the upper side of the large sealing cavity, one end of the support column is rotatably connected to the main transmission shaft, the main transmission shaft passes through the support column and is fixedly connected to a first bevel gear, the outer wall of the threaded buckle is fixedly connected to a second bevel gear, and the second bevel gear is meshed with the first bevel gear.

[0007] Preferably, a second V-belt is rotatably connected between the main transmission shaft and the intermediate shaft, a sliding plate is slidably connected above the circular ring, a motor is fixedly connected above the sliding plate, a rotating buckle is fixedly connected above the long rod, a connecting rod is rotatably connected inside the rotating buckle, the other end of the connecting rod is rotatably connected above the motor, and a hook is fixedly connected to one end of the sliding plate.

[0008] Preferably, a limit rod is rotatably connected above the large sealed cavity, a tension spring is fixedly connected below the limit rod, the other end of the tension spring is fixedly connected to the upper surface of the lifting plate, the other end of the limit rod is inserted into the interior of the limit groove, one end of the prismatic block is fixedly connected to a return spring, and the other end of the return spring is fixedly connected to one side of the motor.

[0009] Preferably, both ends of the auxiliary transmission shaft are fixedly connected with forward wheels, one side of the auxiliary transmission shaft is fixedly connected with a second transmission gear, one end of the motor is fixedly connected with a first transmission gear, the first transmission gear is matched with the second transmission gear, and the hook is matched with the other end of the limit rod.

[0010] Beneficial Effects

[0011] The utility model provides a natural gas leakage detection device. Compared with the prior art, it has the following beneficial effects:

[0012] 1. The natural gas leakage detection device sets a large sealing chamber. When a large natural gas leak occurs, the internal pressure of the natural gas pipeline is small, so that the spring telescopic rod drives the baffle to seal the air inlet, and then the lifting plate moves down to make the natural gas inside the large sealing chamber push open the pressure relief valve on the baffle, and the threaded buckle is driven to rotate through the long column, and then the sealing plate is rotated 90 degrees and closed through the belt drive to prevent continuous leakage and cause safety accidents.

[0013] 2. The natural gas leak detection device drives two sets of forward wheels to rotate through a motor. When the ring moves to the leak point, the natural gas pushes the small sealing chamber to make it rise and then pulls the sliding plate to separate the first transmission gear from the second transmission gear, so that the ring stops moving to block the leak point on the outer wall of the natural gas pipeline. The staff can also determine the location of the leak by observing the position of the ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a side view schematic diagram of the structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the structural ring of the utility model;

[0017] Figure 4 It is a side view schematic diagram of the structural ring of the utility model;

[0018] Figure 5 It is a schematic diagram of the structural thread buckle of the utility model;

[0019] Figure 6 The utility model structure Figure 2 Schematic diagram of point A.

[0020] In the figure: 1. natural gas pipeline; 2. sealing plate; 3. first triangular belt; 4. large sealing chamber; 5. first bevel gear; 6. second bevel gear; 7. second triangular belt; 8. supporting column; 9. circular ring; 10. transfer shaft; 11. lifting plate; 12. long column; 13. limiting rod; 14. tension spring; 15. small sealing chamber; 16. piston head; 17. long rod; 18. rotating buckle; 19. connecting rod; 20. forward wheel; 21. motor; 22. sliding plate; 23. reset spring; 24. first transmission gear; 25. second transmission gear; 26. auxiliary transmission shaft; 27. threaded buckle; 28. spring telescopic rod; 29. ​​baffle; 30. air inlet; 31. hook; 32. prismatic block; 33. main transmission shaft; 34. limiting groove; 35. pressure relief valve. DETAILED DESCRIPTION

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

[0022] Embodiment 1

[0023] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6The utility model provides a technical solution: a natural gas leakage detection device, comprising a natural gas pipeline 1, a large sealed chamber 4 is fixedly connected above the natural gas pipeline 1, two groups of spring telescopic rods 28 are fixedly connected inside the large sealed chamber 4, a baffle 29 is fixedly connected to the upper surface of the spring telescopic rod 28, a pressure relief valve 35 is fixedly connected inside the baffle 29, an air inlet 30 is opened inside the large sealed chamber 4, a sealing plate 2 is rotatably connected to one end of the natural gas pipeline 1, a ring 9 is slidably connected to the outer wall of the natural gas pipeline 1, a small sealed chamber 15 is fixedly connected above the ring 9, a piston head 16 is slidably connected inside the small sealed chamber 15, a long rod 17 is fixedly connected above the piston head 16, a prismatic block 32 is fixedly connected to one end of the ring 9, and a secondary transmission shaft 26 is rotatably connected inside the prismatic block 32.

[0024] A lifting plate 11 is slidably connected inside the large sealed cavity 4, a long column 12 is fixedly connected above the lifting plate 11, a threaded buckle 27 is rotatably connected above the large sealed cavity 4, a central shaft 10 is rotatably connected to one end of the large sealed cavity 4, and a first V-belt 3 is rotatably connected between the central shaft 10 and the sealing plate 2.

[0025] A support column 8 is fixedly connected to the upper side of the large sealing cavity 4, one end of the support column 8 is rotatably connected to the main transmission shaft 33, the main transmission shaft 33 passes through the support column 8 and is fixedly connected to the first bevel gear 5, the outer wall of the threaded buckle 27 is fixedly connected to the second bevel gear 6, and the second bevel gear 6 is meshed with the first bevel gear 5.

[0026] The working principle of the natural gas leakage detection device according to the first embodiment is as follows: when natural gas leaks, the force at the air inlet 30 is insufficient to resist the force of the spring telescopic rod 28, the spring telescopic rod 28 drives the baffle 29 to seal the air inlet 30, and then the pressure relief valve 35 is opened under the compression of the gravity of the lifting plate 11, and then the lifting plate 11 will descend. When the lifting plate 11 descends, since the outer wall of one group of long columns 12 is provided with threads, when the long columns 12 descend, the threaded buckle 27 is driven to rotate, and the outer wall of the threaded buckle 27 is fixedly connected with a second bevel gear. The wheel 6 will rotate with the second bevel gear 6, and the rotation of the second bevel gear 6 will rotate with the first bevel gear 5. The rotation of the first bevel gear 5 can rotate the main transmission shaft 33. The main transmission shaft 33 is connected to the transfer shaft 10 through the second V-belt 7, and the transfer shaft 10 is connected to the sealing plate 2 through the first V-belt 3. Therefore, when the first bevel gear 5 rotates, it can rotate with the sealing plate 2, which can better prevent the natural gas pipeline 1 from leaking. In case of leakage, it can be closed in time, which can better prevent unnecessary safety accidents caused by natural gas leakage.

[0027] Embodiment 2

[0028] See also Figure 1, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 Compared with the first embodiment, the present invention provides a natural gas leakage detection device, and the present embodiment further includes: a second V-belt 7 is rotatably connected between the main transmission shaft 33 and the intermediate shaft 10, a sliding plate 22 is slidably connected above the ring 9, a motor 21 is fixedly connected above the sliding plate 22, a rotating buckle 18 is fixedly connected above the long rod 17, a connecting rod 19 is rotatably connected inside the rotating buckle 18, the other end of the connecting rod 19 is rotatably connected above the motor 21, and a hook 31 is fixedly connected to one end of the sliding plate 22.

[0029] A limit rod 13 is rotatably connected above the large sealed chamber 4, a tension spring 14 is fixedly connected below the limit rod 13, the other end of the tension spring 14 is fixedly connected to the upper surface of the lifting plate 11, the other end of the limit rod 13 is inserted into the inside of the limit groove 34, one end of the prismatic block 32 is fixedly connected to a return spring 23, and the other end of the return spring 23 is fixedly connected to one side of the motor 21.

[0030] The two ends of the auxiliary transmission shaft 26 are fixedly connected to the forward wheels 20, one side of the auxiliary transmission shaft 26 is fixedly connected to the second transmission gear 25, one end of the motor 21 is fixedly connected to the first transmission gear 24, the first transmission gear 24 is adapted to the second transmission gear 25, and the hook 31 is adapted to the other end of the limit rod 13.

[0031] The working principle of the natural gas leakage detection device based on the second embodiment is: when the lifting plate 11 descends due to insufficient air pressure inside the natural gas pipeline 1, it can pull the tension spring 14 at a corner of the lifting plate 11 to move downward together. During the descending process of the tension spring 14, it can move downward together with the limit rod 13. When the limit rod 13 is pulled, the other end of the limit rod 13 disengages from the limit groove 34. At this time, the ring 9 will no longer be restricted, and the hook 31 that restricts the sliding plate 22 will no longer be restricted. At this time, the motor 21 above the sliding plate 22 will engage the first transmission gear 24 with the second transmission gear 25 under the traction of the reset spring 23 above the prismatic block 32. The second transmission gear 25 is fixedly connected to the outer wall of the auxiliary transmission shaft 26. Therefore, when the second transmission gear 25 rotates, it will rotate with the auxiliary transmission shaft 26. The rotation of the auxiliary transmission shaft 26 will rotate with the two sets of forward wheels 20. At this time, the ring 9 can When the ring 9 moves on the outer wall of the natural gas pipeline 1, when the ring 9 encounters a damaged area, the air pressure in the groove inside the ring 9 will increase, and the leaked natural gas can push the piston head 16 inside the small sealed chamber 15 upward. When the piston head 16 moves upward, the long rod 17 will also move upward, and the top of the long rod 17 is fixedly connected to the rotating buckle 18, and the inside of the rotating buckle 18 is rotatably connected to the connecting rod 19, and the connecting rod 19 is rotatably connected to the top of the motor 21. Therefore, when the rotating buckle 18 moves upward, the motor 21 can be moved together with the sliding plate 22, and the first transmission gear 24 at one end of the motor 21 can be separated from the second transmission gear 25. At this time, the forward wheel 20 loses power and stops, and the ring 9 also stops. At this time, the ring 9 just stays at the leakage position of the natural gas pipeline 1, which can better detect the natural gas leakage and enable the staff to better find the leakage, which is convenient for timely repair.

[0032] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A natural gas leak detection device, characterized in that: The invention comprises a natural gas pipeline (1), wherein a large sealed cavity (4) is fixedly connected above the natural gas pipeline (1), two groups of spring telescopic rods (28) are fixedly connected inside the large sealed cavity (4), a baffle (29) is fixedly connected to the upper surface of the spring telescopic rod (28), a pressure relief valve (35) is fixedly connected inside the baffle (29), an air inlet (30) is opened inside the large sealed cavity (4), one end of the natural gas pipeline (1) is rotatably connected to a sealing plate (2), an outer wall of the natural gas pipeline (1) is slidably connected to a circular ring (9), a small sealed cavity (15) is fixedly connected above the circular ring (9), a piston head (16) is slidably connected inside the small sealed cavity (15), a long rod (17) is fixedly connected above the piston head (16), one end of the circular ring (9) is fixedly connected to a prismatic block (32), and the inside of the prismatic block (32) is rotatably connected to a secondary transmission shaft (26).

2. A natural gas leak detection device according to claim 1, characterized in that: The large sealed cavity (4) is slidably connected to a lifting plate (11), the upper part of the lifting plate (11) is fixedly connected to a long column (12), the upper part of the large sealed cavity (4) is rotatably connected to a threaded buckle (27), one end of the large sealed cavity (4) is rotatably connected to a central shaft (10), and a first V-belt (3) is rotatably connected between the central shaft (10) and the sealing plate (2).

3. A natural gas leak detection device according to claim 2, characterized in that: A support column (8) is fixedly connected to the upper side of one side of the large sealing cavity (4); one end of the support column (8) is rotatably connected to a main transmission shaft (33); the main transmission shaft (33) passes through the support column (8) and is fixedly connected to a first bevel gear (5); the outer wall of the threaded buckle (27) is fixedly connected to a second bevel gear (6); the second bevel gear (6) is meshed with the first bevel gear (5).

4. A natural gas leak detection device according to claim 3, characterized in that: A second V-belt (7) is rotatably connected between the main transmission shaft (33) and the intermediate shaft (10); a sliding plate (22) is slidably connected above the circular ring (9); a motor (21) is fixedly connected above the sliding plate (22); a rotating buckle (18) is fixedly connected above the long rod (17); a connecting rod (19) is rotatably connected inside the rotating buckle (18); the other end of the connecting rod (19) is rotatably connected above the motor (21); and a hook (31) is fixedly connected to one end of the sliding plate (22).

5. A natural gas leak detection device according to claim 4, characterized in that: The upper part of the large sealed cavity (4) is rotatably connected to a limit rod (13); the lower part of the limit rod (13) is fixedly connected to a tension spring (14); the other end of the tension spring (14) is fixedly connected to the upper surface of the lifting plate (11); the other end of the limit rod (13) is inserted into the interior of the limit groove (34); one end of the prismatic block (32) is fixedly connected to a return spring (23); the other end of the return spring (23) is fixedly connected to one side of the motor (21).

6. A natural gas leak detection device according to claim 5, characterized in that: The two ends of the auxiliary transmission shaft (26) are fixedly connected to the forward wheels (20), one side of the auxiliary transmission shaft (26) is fixedly connected to the second transmission gear (25), one end of the motor (21) is fixedly connected to the first transmission gear (24), the first transmission gear (24) is matched with the second transmission gear (25), and the hook (31) is matched with the other end of the limit rod (13).

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