Flange plate air leakage detection device

Abstract

The invention belongs to the field of air leakage detection, and particularly relates to a flange plate air leakage detection device, which comprises two groups of flange plate main bodies, the two groups of flange plate main bodies are provided with inclined planes, the flange plate main bodies are provided with detection mechanisms, the detection mechanisms comprise mounting shells, the bottom ends of the mounting shells abut against the flange plate main bodies, and the bottom ends of the mounting shells abut against the flange plate main bodies. Two sets of exhaust pipes are fixedly connected to the top end of the mounting shell, first springs are fixedly connected to the inner walls of the exhaust pipes, the bottom ends of the first springs are fixedly connected with moving blocks, inserting rods are inserted into the middles of the moving blocks, the inserting rods are fixedly connected to the inner wall of the mounting shell, and two sets of connecting blocks are fixedly connected to the bottom ends of the moving blocks. Through the structural design of the detection mechanism, when air leakage of the flange plate main body is detected, a rubber strip in the mounting shell can abut against the flange plate main body, so that the air leakage position is blocked at the first time, and the air leakage position can be temporarily treated before a maintainer arrives.

Description

Technical Field

[0001] The invention relates to the field of air leakage detection, in particular to a flange air leakage detection device. Background Art

[0002] In the field of petroleum and chemical industry, pipelines are responsible for transporting various fluids, among which flanges are key components of pipeline connections. However, due to the corrosion of internal fluids and other factors, leaks may appear on the flanges. Therefore, it is necessary to use a leak detection device for detection so that the leaks can be repaired in time.

[0003] According to the patent document CN202410255643.4, a gas pipe flange leakage detection device includes a sealing cover, multiple detectors and a visual display subsystem. First, the sealing cover covers and seals the gas pipe flange; then, the multiple detectors detect the natural gas concentration at the position of the sealing cover; finally, the visual display subsystem performs a visual display based on the natural gas concentration and the positions of the multiple detectors, thereby realizing online detection of the gas pipe flange without manual operation, improving detection efficiency, and solving the problem of low efficiency of existing flange leakage detection.

[0004] However, although the flange leakage detection device in the above technology can perform online detection of the leakage of the flange, after the leakage is detected, it takes a certain amount of time for maintenance personnel to arrive at the site, so the leakage position of the flange cannot be blocked in time. Therefore, before the maintenance personnel arrive at the site for repair, the flange will always be in a leaking state, resulting in waste of resources and economic losses. Therefore, a flange leakage detection device is proposed to address the above problem. Summary of the invention

[0005] In order to solve the problem that the flange leakage detection device in the above technology can perform online detection of the leakage of the flange, after the leakage is detected, it takes a certain amount of time for the maintenance personnel to arrive at the scene, so that the leakage position of the flange cannot be blocked in time at the first time. Therefore, before the maintenance personnel arrive at the scene for repair, the flange will always be in a leakage state, causing waste of resources and economic losses. The present invention proposes a flange leakage detection device.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a flange leakage detection device described in the present invention comprises two groups of flange bodies, the two groups of flange bodies are provided with inclined surfaces, the flange bodies are provided with a detection mechanism, the detection mechanism comprises a mounting shell, the bottom end of the mounting shell abuts against the flange body, the top end of the mounting shell is fixedly connected with two groups of exhaust pipes, the inner wall of the exhaust pipe is fixedly connected with a first spring, the bottom end of the first spring is fixedly connected with a moving block, a plug rod is inserted in the middle of the moving block, the plug rod is fixedly connected to the inner wall of the mounting shell, the bottom end of the moving block is fixedly connected with two groups of connecting blocks, The connecting block is slidingly connected to the top of the pulling rod, and the bottom end of the pulling rod is fixedly connected to the fixing rod, and the fixing rod is clamped on the fixing slot, and the fixing rod and the fixing slot are both trapezoidal in design, and the fixing slot is opened on the left and right sides of the movable plate, and a rubber strip is fixedly connected to the bottom end of the movable plate, and the rubber strip is aligned with the through slot directly below, and the through slot is opened at the bottom end of the mounting shell, and a second spring and a plug column are fixedly connected to the top of the movable plate, and the second spring is sleeved on the plug column, and the top of the second spring is fixedly connected to the inner wall of the mounting shell, and the top of the plug column is inserted into the interior of the extension column, and the extension column is fixedly connected to the top of the mounting shell.

[0007] Preferably, a sealing mechanism is provided at the bottom end of the mounting shell, the sealing mechanism comprises two groups of sealing strips, the sealing strips are inserted into the inside of the sealing groove, the sealing groove is opened at the bottom end of the mounting shell, the sealing groove is located at the front and rear sides of the through groove, the top end of the sealing strip is fixedly connected with a mounting plate, the left and right sides of the mounting plate are both slidably connected to the inside of the sliding groove, the sliding groove is opened on the inner wall of the mounting shell, the top end of the mounting plate is fixedly connected with two groups of long rods and a fourth spring, the fourth spring is sleeved on the long rod, the top end of the fourth spring is fixedly connected to the top block, the top block is inserted on the long rod, the top end of the top block abuts against the bottom end of the protrusion, the protrusion is fixedly connected to the connecting plate, the connecting plate is fixedly connected with a connecting spring, the connecting plate is fixedly connected to the fixing rod, the top end of the long rod is fixedly connected with a third spring, and the top end of the third spring is fixedly connected to the inner wall of the mounting shell.

[0008] Preferably, a fixing component is provided at the top of the movable plate, and the fixing component includes a plurality of groups of card blocks, the card blocks are fitted with the sides of the movable plate, the card blocks are fixedly connected to the bottom end of the fixing rod, a groove corresponding to the card slot is provided on the card block, the card slot is fixedly connected to the top of the movable plate, and the card slot is designed to be trapezoidal.

[0009] Preferably, the top end of the connecting plate is fixedly connected to a limiting block, the limiting block is L-shaped, the top end of the limiting block is close to an abutment rod, the abutment rod is rotatably connected to the mounting shell, and a knob is fixedly connected to the side of the abutment rod away from the connecting plate.

[0010] Preferably, a sealing ring is fixedly connected to the inner wall of the extension column, and the sealing ring is sleeved on the plug column.

[0011] Preferably, a support block is fixedly connected to the inner wall of the mounting shell, and the top end of the support block contacts the bottom end of the connecting plate.

[0012] Preferably, a circular groove is formed at the top of the plug post, and a fixing hook is fixedly connected to the inner wall of the circular groove.

[0013] Preferably, a sealing block is fixedly connected to the bottom end of the mounting shell, and the cross section of the sealing block is designed to be V-shaped.

[0014] Preferably, mounting blocks are fixedly connected to the left and right sides of the mounting shell, the bottom end of the mounting block on the left is rotatably connected to the mounting ring, two groups of mounting rings are provided, a rubber sleeve is sleeved on the inner wall of the mounting ring on the left, and the bottom end of the mounting block on the right is fixedly connected to the mounting ring on the right.

[0015] Preferably, both the front and rear sides of the right side mounting ring are fixedly connected with extension rods, the side of the extension rod away from the mounting ring abuts against a support rod, and the support rod is fixedly connected to the flange body.

[0016] The present invention is beneficial in that: 1. The present invention adopts the structural design of the detection mechanism. When a leakage is detected in the flange body, the rubber strip inside the mounting shell will abut against the flange body, thereby sealing the leakage position in the first time, so that the leakage position can be temporarily processed before the maintenance personnel arrive to reduce gas leakage. This solves the problem of flange leakage detection device in the prior art. Although it can perform online detection of flange leakage, after the leakage is detected, it takes a certain amount of time for the maintenance personnel to arrive at the scene, so that the leakage position of the flange cannot be blocked in time in the first time. Therefore, before the maintenance personnel arrive at the scene for repair, the flange will be in a leaking state, resulting in waste of resources and economic losses.

[0017] 2. Through the structural design of the sealing mechanism of the present invention, after the sealing strip is squeezed by the mounting plate, the bottom end of the sealing strip can be more closely abutted against the flange body, so as to reduce the leakage of gas inside the mounting shell during the leakage detection process, improve the sealing between the bottom end of the mounting shell and the flange body, and make the sealing effect of the bottom end of the mounting shell better, so as to avoid the leakage of gas inside the mounting shell from the bottom end of the mounting shell, which causes the response time of the rubber strip to be prolonged.

[0018] 3. The present invention adopts the structural design of the fixing assembly. When the rubber strip moves downward to seal the flange body, the two groups of fixing rods will first move to both sides, and the connecting springs will be stretched. When the two groups of fixing rods are located above the movable plate, under the action of the connecting springs, the two groups of fixing rods will move toward each other, and the blocks fixed at the bottom ends of the fixing rods will be clamped together with the clamping grooves, thereby ensuring that the movable plate will not move upward at this time, so as to fix the movable plate and ensure that the rubber strip and the flange body can be in close contact with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a structural schematic diagram of the installation shell of the present invention; Figure 3 It is a structural schematic diagram of the bottom end of the mounting shell of the present invention; Figure 4 It is a schematic diagram of the structure inside the installation shell of the present invention; Figure 5 It is a structural schematic diagram of the sealing mechanism of the present invention; Figure 6 It is a structural schematic diagram of the detection mechanism of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the installation shell of the present invention; Figure 8 It is a schematic structural diagram of the inner wall of the mounting shell of the present invention; Fig. 9 It is a schematic diagram of the connection structure of the moving block of the present invention; Fig.10 for Figure 7 A partial enlarged view of point A in the middle.

[0021] In the figure: 1, flange body; 20, mounting shell; 21, through groove; 22, rubber strip; 23, moving plate; 24, fixing rod; 25, pulling rod; 26, connecting block; 27, moving block; 28, first spring; 29, extension column; 30, plug rod; 31, exhaust pipe; 32, second spring; 33, plug column; 34, round groove; 35, fixing hook; 36, fixing groove; 37, connecting plate; 38, clamping block; 39, clamping groove ; 40. Bump; 41. Limit block; 42. Support block; 43. Sealing groove; 44. Sealing ring; 45. Third spring; 46. Long rod; 47. Fourth spring; 48. Sealing strip; 50. Sliding groove; 51. Mounting plate; 52. Top block; 53. Connecting spring; 54. Abutment rod; 55. Knob; 56. Sealing block; 57. Mounting block; 58. Rubber sleeve; 59. Mounting ring; 61. Extension rod; 62. Support rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0023] See also Figure 1 - Fig.10As shown, a flange leakage detection device comprises two groups of flange bodies 1, the two groups of flange bodies 1 are provided with inclined surfaces, the flange bodies 1 are provided with a detection mechanism, the detection mechanism comprises a mounting shell 20, the bottom end of the mounting shell 20 abuts against the flange body 1, the top of the mounting shell 20 is fixedly connected with two groups of exhaust pipes 31, the inner wall of the exhaust pipe 31 is fixedly connected with a first spring 28, the bottom end of the first spring 28 is fixedly connected with a moving block 27, an insertion rod 30 is inserted in the middle of the moving block 27, the insertion rod 30 is fixedly connected to the inner wall of the mounting shell 20, the bottom end of the moving block 27 is fixedly connected with two groups of connecting blocks 26, the connecting block 26 is slidably connected with the top of the pulling rod 25, the The bottom end of the pulling rod 25 is fixedly connected to the fixing rod 24, and the fixing rod 24 is clamped on the fixing groove 36. The fixing rod 24 and the fixing groove 36 are both trapezoidal in design. The fixing groove 36 is opened on the left and right sides of the movable plate 23. The bottom end of the movable plate 23 is fixedly connected with a rubber strip 22, and the rubber strip 22 is aligned with the through groove 21 directly below. The through groove 21 is opened at the bottom end of the mounting shell 20. The top end of the movable plate 23 is fixedly connected with a second spring 32 and a plug post 33. The second spring 32 is sleeved on the plug post 33. The top end of the second spring 32 is fixedly connected to the inner wall of the mounting shell 20. The top end of the plug post 33 is inserted into the inside of the extension column 29, and the extension column 29 is fixedly connected to the top end of the mounting shell 20. Through the structural design of the detection mechanism, when the flange main body 1 is detected to have a leak, the rubber strip 22 inside the mounting shell 20 will abut against the flange main body 1, thereby blocking the leaking position in the first place, so that before the maintenance personnel arrive, the leaking position can be temporarily processed to reduce gas leakage. During operation, when the flange main body 1 has a leak, the leaked gas will enter the interior of the mounting shell 20 through the through groove 21, causing the pressure inside the mounting shell 20 to increase. As the pressure inside the mounting shell 20 changes, the moving The block 27 will slide upward inside the exhaust pipe 31, and the first spring 28 will be compressed. Since the top end of the insertion rod 30 is inserted in the middle of the moving block 27, the gas inside the installation shell 20 will not leak out when the insertion rod 30 is not separated from the moving block 27. When the internal pressure of the installation shell 20 reaches a certain level, the insertion rod 30 will be separated from the moving block 27, and the gas inside the installation shell 20 can be discharged to the outside through the moving block 27 and the exhaust pipe 31. Two sets of connecting blocks 26 are fixed at the bottom end of the moving block 27, and the connecting block 26 is slidably connected with the pulling rod 25. When the moving block 27 moves upward and separates from the plug rod 30, the connecting block 26 pulls the pulling rod 25 upward, and the bottom end of the pulling rod 25 is connected to the fixing rod 24, so that the fixing rod 24 originally stuck in the fixing groove 36 slides out of the fixing groove 36. At this time, the moving plate 23 can move downward under the action of the second spring 32, and the top of the plug post 33 will slide inside the extension column 29, so that it is easy to judge whether the flange body 1 needs to be repaired by observing the position of the plug post 33 inside the extension column 29, and the rubber fixed at the bottom end of the moving plate 23 The rubber strip 22 will abut against the flange body 1, thereby completing the sealing of the flange body 1, wherein the fixing rod 24 and the fixing groove 36 are both designed in a trapezoidal shape, so that the fixing rod 24 can slide out of the fixing groove 36 normally, and an inclined surface is provided on the flange body 1, and the two sets of inclined surfaces on the flange body 1 can be spliced ​​into a complete V-groove, the rubber strip 22 is designed in an arc shape and the cross section of the rubber strip 22 is designed in a V shape, so as to better abut against the flange body 1, and the bottom end part of the mounting shell 20 is designed in an arc shape so as to fit the surface of the flange body 1.

[0024] Further, a sealing mechanism is provided at the bottom end of the mounting shell 20, and the sealing mechanism includes two sets of sealing strips 48, and the sealing strips 48 are inserted into the inside of the sealing groove 43, and the sealing groove 43 is opened at the bottom end of the mounting shell 20, and the sealing groove 43 is located at the front and rear sides of the through groove 21, and the top of the sealing strip 48 is fixedly connected with a mounting plate 51, and the left and right sides of the mounting plate 51 are both slidably connected to the inside of the sliding groove 50, and the sliding groove 50 is opened on the inner wall of the mounting shell 20, and the top of the mounting plate 51 is fixedly connected with two sets of long rods 4 6 and a fourth spring 47, the fourth spring 47 is sleeved on the long rod 46, the top end of the fourth spring 47 is fixedly connected to the top block 52, the top block 52 is inserted on the long rod 46, the top end of the top block 52 abuts against the bottom end of the protrusion 40, the protrusion 40 is fixedly connected to the connecting plate 37, the connecting plate 37 is fixedly connected with a connecting spring 53, the connecting plate 37 is fixedly connected with the fixing rod 24, the top end of the long rod 46 is fixedly connected with the third spring 45, and the top end of the third spring 45 is fixedly connected to the inner wall of the mounting shell 20; Through the structural design of the sealing mechanism, after the sealing strip 48 is squeezed by the mounting plate 51, the bottom end portion of the sealing strip 48 can be more closely abutted against the flange main body 1, so as to reduce the leakage of the gas inside the mounting shell 20 during the leakage detection process, improve the sealing between the bottom end of the mounting shell 20 and the flange main body 1, and make the sealing effect of the bottom end of the mounting shell 20 better, so as to avoid the gas inside the mounting shell 20 leaking out from the bottom end of the mounting shell 20, resulting in a longer response time of the rubber strip 22. When working, both sides of the two groups of fixing rods 24 are fixed with connecting plates 37, and the two adjacent groups of connecting plates 37 are fixed with connecting springs 53. The two groups of fixing rods 24 are connected together by the connecting springs 53. The connecting plate 37 is fixed with a protrusion 40, and the bottom end of the protrusion 40 abuts against the top block 52, thereby compressing the top block 52 fixed at the bottom end. The fourth spring 47, the bottom end of the fourth spring 47 will squeeze the mounting plate 51, and the mounting plate 51 will squeeze the sealing strip 48. The sealing strip 48 is made of rubber material and can seal the bottom end of the mounting shell 20 and the flange body 1, wherein the top end of the long rod 46 is connected to the third spring 45, and the two sides of the mounting plate 51 slide inside the sliding groove 50, and the sliding distance of the two sides of the mounting plate 51 inside the sliding groove 50 is limited to avoid the sliding distance of the mounting plate 51 being too large, resulting in the sealing strip 48 on the flange body 1. Deterioration. Since the fixing rod 24 will first move to both sides when moving upward, in order to avoid the movement of the protrusion 40 and abutting against the long rod 46, a corresponding movable groove is opened on the protrusion 40 to ensure the normal movement of the protrusion 40. Similarly, a corresponding movable groove is also opened on the connecting block 26 to facilitate the normal sliding of the top of the pulling rod 25.

[0025] Furthermore, a fixing assembly is provided at the top of the movable plate 23, and the fixing assembly includes a plurality of blocks 38, the blocks 38 are fitted with the side of the movable plate 23, the blocks 38 are fixedly connected to the bottom end of the fixing rod 24, and a groove corresponding to a slot 39 is provided on the blocks 38, the slot 39 is fixedly connected to the top of the movable plate 23, and the slot 39 is designed in a trapezoidal shape; Through the structural design of the fixing assembly, when the rubber strip 22 moves downward to block the flange body 1, the two sets of fixing rods 24 will first move to both sides, and the connecting spring 53 will be stretched. When the two sets of fixing rods 24 are located above the moving plate 23, under the action of the connecting spring 53, the two sets of fixing rods 24 will move toward each other, and the block 38 fixed at the bottom end of the fixing rod 24 will be clamped together with the clamping groove 39, thereby ensuring that the moving plate 23 will not move upward at this time, so as to fix the moving plate 23 and ensure that the rubber strip 22 and the flange body 1 can be in close contact with each other. When working, the pulling rod 2 When the fixing rod 24 is pulled upward to move, the fixing rod 24 will move to both sides, and the fixing rod 24 and the block 38 fixed at the bottom end of the fixing rod 24 will fit with the outer side of the moving plate 23. When the block 38 is no longer fitted with the moving plate 23, the fixing rod 24 will move closer to each other under the action of the connecting spring 53, and the block 38 will also be locked together with the slot 39. At this time, the top end of the moving plate 23 and the bottom end of the block 38 will abut together. At this time, the moving plate 23 cannot move upward, and the position of the moving block 27 on the exhaust pipe 31 can also be kept fixed, so that the inside of the mounting shell 20 can always be connected with the outside.

[0026] Furthermore, the top of the connecting plate 37 is fixedly connected to a limit block 41, the limit block 41 is L-shaped, the top of the limit block 41 is close to the abutment rod 54, the abutment rod 54 is rotatably connected to the mounting shell 20, and the side of the abutment rod 54 away from the connecting plate 37 is fixedly connected to a knob 55; When working, the limit block 41 is designed in an L shape and one side is close to the abutment rod 54. At this time, the two sides of the abutment rod 54 can be limited by the limit block 41. At this time, the abutment rod 54 is rotated. The abutment rod 54 is restricted by the limit block 41, so it is more laborious to rotate. The abutment rod 54 is fixed together with the knob 55 to facilitate the rotation of the abutment rod 54 by the knob 55. When the fixed rod 24 moves upward, the limit block 41 will also move upward synchronously. The top end of the limit block 41 is no longer close to the abutment rod 54, and the abutment rod 54 is rotated more smoothly. The fixed rod 24 is pushed to move to both sides by the abutment rod 54 so that the fixed rod 24 can be re-inserted into the fixed groove 36.

[0027] Furthermore, a sealing ring 44 is fixedly connected to the inner wall of the extension column 29, and the sealing ring 44 is sleeved on the plug column 33; During operation, the sealing ring 44 is fixed on the inner wall of the extension column 29 and sleeved on the plug column 33 , so as to improve the sealing performance between the inner wall of the extension column 29 and the plug column 33 .

[0028] Furthermore, a support block 42 is fixedly connected to the inner wall of the mounting shell 20, and the top end of the support block 42 contacts the bottom end of the connecting plate 37; During operation, the support block 42 is fixed on the inner wall of the mounting shell 20 and abuts against the bottom end of the connecting plate 37 , so as to limit the connecting plate 37 and prevent the connecting plate 37 from moving downward.

[0029] Furthermore, a circular groove 34 is formed at the top of the plug post 33, and a fixing hook 35 is fixedly connected to the inner wall of the circular groove 34; During operation, when the top end of the plug post 33 moves downward inside the extension post 29 , the plug post 33 can be pulled upward by the fixing hook 35 so as to reset the plug post 33 .

[0030] Furthermore, a sealing block 56 is fixedly connected to the bottom end of the mounting shell 20, and the cross section of the sealing block 56 is designed in a V shape; During operation, a sealing block 56 is fixed to the bottom end of the mounting shell 20 , and the sealing block 56 is used to improve the sealing between the bottom end of the mounting shell 20 and the flange body 1 , so that the sealing effect between the mounting shell 20 and the flange body 1 is better. Embodiment 2

[0031] See also Figure 1 and Figure 2 As shown, comparative example 1 is another embodiment of the present invention, the left and right sides of the mounting shell 20 are fixedly connected with mounting blocks 57, the bottom end of the left mounting block 57 is rotatably connected to the mounting ring 59, the mounting ring 59 is provided with two groups, the inner wall of the left mounting ring 59 is sleeved with a rubber sleeve 58, and the bottom end of the right mounting block 57 is fixedly connected to the right mounting ring 59; During operation, corresponding slots are provided on both sets of mounting rings 59 so that the mounting rings 59 can be clamped on the bolts of the flange body 1 to fix the mounting shell 20. The left mounting ring 59 is rotatably connected to the mounting block 57. When disassembling, the left mounting ring 59 can be rotated to release the fixation of that side. A rubber sleeve 58 is fixed on the inner wall of the left mounting ring 59 so that the deformation of the rubber sleeve 58 can ensure that the mounting ring 59 can be smoothly separated from the bolts on the flange body 1.

[0032] The front and rear sides of the right side mounting ring 59 are both fixedly connected with extension rods 61, and the side of the extension rod 61 away from the mounting ring 59 abuts against a support rod 62, and the support rod 62 is fixedly connected to the flange body 1; During operation, two groups of extension rods 61 are fixed on the right mounting ring 59 , and the extension rods 61 abut against the support rods 62 , thereby supporting the right mounting ring 59 . At the same time, the support of the extension rods 61 can also ensure that the bolts will not be easily loosened.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A flange leakage detection device, comprising two sets of flange bodies (1), wherein the two sets of flange bodies (1) are provided with inclined surfaces, and characterized in that: The flange main body (1) is provided with a detection mechanism, the detection mechanism comprising a mounting shell (20), the bottom end of the mounting shell (20) abutting against the flange main body (1), the top end of the mounting shell (20) being fixedly connected to two groups of exhaust pipes (31), the inner wall of the exhaust pipe (31) being fixedly connected to a first spring (28), the bottom end of the first spring (28) being fixedly connected to a moving block (27), a plug rod (30) being inserted in the middle of the moving block (27), the plug rod (30) being fixedly connected to the inner wall of the mounting shell (20), the bottom end of the moving block (27) being fixedly connected to two groups of connecting blocks (26), the connecting blocks (26) being slidably connected to the top end of the pulling rod (25), the bottom end of the pulling rod (25) being fixedly connected to a fixing rod (24), the fixing rod (24) is clamped on the fixing groove (36), the fixing rod (24) and the fixing groove (36) are both trapezoidal in design, the fixing groove (36) is opened on the left and right sides of the movable plate (23), the bottom end of the movable plate (23) is fixedly connected with a rubber strip (22), the rubber strip (22) is aligned with the through groove (21) directly below, the through groove (21) is opened at the bottom end of the mounting shell (20), the top end of the movable plate (23) is fixedly connected with a second spring (32) and a plug column (33), the second spring (32) is sleeved on the plug column (33), the top end of the second spring (32) is fixedly connected to the inner wall of the mounting shell (20), the top end of the plug column (33) is inserted into the inside of the extension column (29), and the extension column (29) is fixedly connected to the top end of the mounting shell (20).

2. A flange leakage detection device according to claim 1, characterized in that: A sealing mechanism is provided at the bottom end of the mounting shell (20), the sealing mechanism comprising two groups of sealing strips (48), the sealing strips (48) being inserted into the interior of a sealing groove (43), the sealing groove (43) being provided at the bottom end of the mounting shell (20), the sealing groove (43) being located at the front and rear sides of the through groove (21), the top end of the sealing strip (48) being fixedly connected to a mounting plate (51), the left and right sides of the mounting plate (51) being slidably connected to the interior of a sliding groove (50), the sliding groove (50) being provided on the inner wall of the mounting shell (20), the top end of the mounting plate (51) being fixedly connected to two groups of long rods (46) and a fourth elastic member The fourth spring (47) is sleeved on the long rod (46), the top end of the fourth spring (47) is fixedly connected to the top block (52), the top block (52) is inserted into the long rod (46), the top end of the top block (52) abuts against the bottom end of the protrusion (40), the protrusion (40) is fixedly connected to the connecting plate (37), the connecting plate (37) is fixedly connected with a connecting spring (53), the connecting plate (37) is fixedly connected with the fixing rod (24), the top end of the long rod (46) is fixedly connected with the third spring (45), and the top end of the third spring (45) is fixedly connected to the inner wall of the mounting shell (20).

3. A flange leakage detection device according to claim 1, characterized in that: A fixing assembly is provided at the top of the movable plate (23), the fixing assembly comprising a plurality of groups of card blocks (38), the card blocks (38) being fitted with the side edges of the movable plate (23), the card blocks (38) being fixedly connected to the bottom ends of the fixing rods (24), the card blocks (38) being provided with grooves corresponding to the card slots (39), the card slots (39) being fixedly connected to the top of the movable plate (23), and the card slots (39) being of trapezoidal design.

4. A flange leakage detection device according to claim 2, characterized in that: The top end of the connecting plate (37) is fixedly connected to a limit block (41), the limit block (41) is L-shaped, the top end of the limit block (41) is close to an abutment rod (54), the abutment rod (54) is rotatably connected to the mounting shell (20), and a knob (55) is fixedly connected to the side of the abutment rod (54) away from the connecting plate (37).

5. A flange leakage detection device according to claim 1, characterized in that: A sealing ring (44) is fixedly connected to the inner wall of the extension column (29), and the sealing ring (44) is sleeved on the insertion column (33).

6. A flange leakage detection device according to claim 4, characterized in that: A support block (42) is fixedly connected to the inner wall of the mounting shell (20), and the top end of the support block (42) contacts the bottom end of the connecting plate (37).

7. A flange leakage detection device according to claim 5, characterized in that: A circular groove (34) is formed at the top end of the insertion column (33), and a fixing hook (35) is fixedly connected to the inner wall of the circular groove (34).

8. A flange leakage detection device according to claim 6, characterized in that: A sealing block (56) is fixedly connected to the bottom end of the mounting shell (20), and the cross section of the sealing block (56) is designed to be V-shaped.

9. A flange leakage detection device according to claim 8, characterized in that: The left and right sides of the mounting shell (20) are both fixedly connected with mounting blocks (57), the bottom end of the left mounting block (57) is rotatably connected to a mounting ring (59), two groups of mounting rings (59) are provided, a rubber sleeve (58) is sleeved on the inner wall of the left mounting ring (59), and the bottom end of the right mounting block (57) is fixedly connected to the right mounting ring (59).

10. A flange leakage detection device according to claim 9, characterized in that: The front and rear sides of the right mounting ring (59) are both fixedly connected to extension rods (61), and the side of the extension rod (61) away from the mounting ring (59) abuts against a support rod (62), and the support rod (62) is fixedly connected to the flange body (1).

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