Online detector for safety relief valve of gas tank

Abstract

The utility model relates to special equipment safety detection technical field discloses the gas tank safety relief valve on -line detection appearance, including the shell, the top fixedly connected with the fixed plate of shell, the inner wall fixedly connected with the connecting mechanism of fixed plate, the top fixedly connected with the top cap of shell rear side, the inner wall fixedly connected with the fixed mechanism of top cap, the top fixedly connected with the instrument of shell, the top fixedly connected with the pipeline of connecting mechanism, the connecting mechanism includes a plurality of connecting pipes, a plurality of the bottom fixedly connected with the top inner wall of fixed plate of connecting pipe. In the utility model, effectively handled the gas tank safety relief valve on -line detection appearance in the use pipe connection complicated problem. Improved detection efficiency, reduced the air leakage risk due to improper connection operation, ensured the accuracy of detection data and the safety of field operation.

Description

Technical Field

[0001] This utility model relates to the field of special equipment safety testing technology, and in particular to an online testing instrument for gas cylinder safety relief valves. Background Technology

[0002] The safety relief valve for gas cylinders automatically opens and quickly releases the internal medium to reduce pressure when the internal pressure rises to a preset safety threshold due to overfilling, thermal expansion, or other abnormal conditions. Once the pressure drops to a safe range, it automatically closes and seals, effectively preventing explosions, leaks, and other catastrophic accidents caused by overpressure. As the "last line of defense" ensuring the safe operation of gas cylinders, it uses precise pressure sensing and mechanical action mechanisms to achieve dynamic monitoring and emergency protection of the cylinder pressure. It is a crucial device that meets the requirements of special equipment safety regulations and safeguards production safety and the lives and property of the people.

[0003] The online testing instrument for gas cylinder safety relief valves uses a suitable mechanical clamp to stably fix the testing device on the safety valve. It uses high-precision sensors such as pressure, displacement, and force to collect key parameters such as pressure changes, valve disc displacement, and opening force of the safety valve in real time during the operation of the gas cylinder. After these parameters are transmitted to the automated control system, the built-in data processing and analysis algorithms perform filtering, noise reduction, and feature extraction to accurately determine the core indicators such as the opening pressure and sealing performance of the safety valve. At the same time, under the protection of explosion-proof and other safety protection mechanisms, the entire testing process is completed through automated program control, realizing real-time dynamic monitoring of the operating status of the safety valve and troubleshooting of potential faults.

[0004] However, some existing online testing instruments for gas cylinder safety relief valves suffer from cumbersome pipeline connections during use. Some interfaces have unreasonable structural designs, requiring repeated adjustments with specialized tools to ensure connection performance. Slight negligence can easily lead to leaks, affecting the accuracy of the test data. Furthermore, in confined industrial spaces or high-altitude work environments, the difficulty of pipeline connections is further increased, making it difficult for operators to quickly and conveniently complete the connection. This not only reduces testing efficiency but also easily leads to safety hazards due to improper operation. Therefore, the online testing instrument for gas cylinder safety relief valves is proposed to solve these problems. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides an online testing instrument for gas cylinder safety relief valves, which aims to improve the problem of cumbersome pipeline connections in the use of existing online testing instruments for gas cylinder safety relief valves.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an online detection instrument for a gas tank safety relief valve, comprising a housing, a fixing plate fixedly connected to the top of the housing, a connecting mechanism fixedly connected to the inner wall of the fixing plate, a top cover fixedly connected to the rear top of the housing, a fixing mechanism fixedly connected to the inner wall of the top cover, an instrument fixedly connected to the top of the housing, and a pipe fixedly connected to the top of the connecting mechanism; the connecting mechanism includes multiple connecting pipes, the bottom ends of the multiple connecting pipes being externally fixedly connected to the inner wall of the top of the fixing plate, fixing pipes fixedly connected to the inner walls of the multiple connecting pipes, multiple contraction columns I fixedly connected to the outer bottom ends of the multiple fixing pipes, multiple limiting balls fixedly connected to the opposite sides of the multiple contraction columns I, multiple locking blocks fixedly connected to the outer bottom ends of the multiple connecting pipes, and contraction columns II fixedly connected to the opposite sides of the multiple locking blocks; and an adjustment component fixedly connected to the inner wall of the top of the fixing plate.

[0007] As a further description of the above technical solution: the fixing mechanism includes multiple movable plates, the external of which are fixedly connected to the inner wall of the top cover. H-shaped limiting plates are fixedly connected to the front inner walls of each of the multiple movable plates. Two rotating shafts are rotatably connected to the inner walls of each of the multiple H-shaped limiting plates. Semi-ring clamps are fixedly connected to the front external sides of each of the two rotating shafts. Multiple telescopic columns are fixedly connected to the adjacent sides of each of the two semi-ring clamps. Semi-ring plates are slidably connected to the adjacent sides of each of the two semi-ring clamps. Two limiting blocks are fixedly connected to the upper and lower front ends of each of the multiple movable plates. Telescopic columns are rotatably connected to the front sides of each of the multiple limiting blocks. Two limiting blocks are fixedly connected to the distant sides of each of the two semi-ring clamps. Two limiting posts are fixedly connected to the left and right inner walls of each of the multiple H-shaped limiting plates. Control strips are fixedly connected to the front sides of each of the multiple limiting posts.

[0008] As a further description of the above technical solution: the adjustment component includes multiple sealing rings, the top ends of the multiple sealing rings are fixedly connected to the inner wall of the top end of the fixed plate, control rings are slidably connected to the outside of the multiple connecting pipes, multiple sliders are fixedly connected to the inner walls of the multiple control rings, pressure plates are fixedly connected to the adjacent sides of the multiple sliders, reset posts are fixedly connected to the top ends of the multiple pressure plates, connecting posts are fixedly connected to the bottom ends of the multiple pressure plates, and push blocks are fixedly connected to the bottom ends of the multiple connecting posts.

[0009] As a further description of the above technical solution: the top ends of the plurality of sealing rings are fixedly connected to the inner walls of the bottom ends of the plurality of connecting pipes, and the opposite sides of the plurality of shrinkage columns are fixedly connected to the inner walls of the fixing plate.

[0010] As a further description of the above technical solution: the bottom ends of the plurality of push blocks are slidably connected to the outside of the plurality of limiting balls, the outside of the plurality of connecting columns are slidably connected to the inside of the plurality of connecting tubes, and the outside of the plurality of limiting balls are fixedly connected to the inner wall of the plurality of connecting tubes.

[0011] As a further description of the above technical solution: the top ends of the plurality of reset posts are fixedly connected to the inner walls of the plurality of connecting tubes, and the outer surfaces of the plurality of pressure plates are slidably connected to the inner walls of the plurality of connecting tubes.

[0012] As a further description of the above technical solution: the front sides of the multiple telescopic columns are rotatably connected to the inner walls of the multiple limiting blocks, and the outer sides of the multiple H-shaped limiting plates are slidably connected to the inner walls of the top cover.

[0013] As a further description of the above technical solution: the external fixed connection of the plurality of limiting posts is to the inner wall of the top cover, and the external fixed connection of the plurality of control strips is to the front inner wall of the plurality of H-shaped limiting plates.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, the sliding ring drives the slider and pressure plate to move. The push block moves down with the connecting column and squeezes the limiting ball to contract, realizing the rapid separation of the connecting tube and the fixed tube. The reset column pushes the pressure plate to reset, and the limiting ball pops out to clamp the connecting tube, completing the stable connection. Thus, the connecting tube and the fixed tube can be easily disassembled and assembled, and the sealing is stable.

[0016] In this utility model, the control bar drives the limiting column to move the H-shaped limiting plate, and the telescopic column two pulls the limiting block two to make the semi-ring clamp rotate around the rotating shaft. The semi-ring plate closes with the semi-ring clamp to form a wrap around the pipe, thereby achieving the effect of tight clamping and stable fixation of the pipe by the semi-ring plate. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the online testing instrument for gas cylinder safety relief valves proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the outer shell of the online testing instrument for gas cylinder safety relief valves proposed in this utility model;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0021] Legend:

[0022] 1. Outer shell; 2. Fixing plate; 3. Connecting mechanism; 31. Connecting pipe; 32. Fixing pipe; 33. Retraction column one; 34. Limiting ball; 35. Retraction column two; 36. Locking block; 37. Adjusting assembly; 371. Sealing ring; 372. Control ring; 373. Slider; 374. Pressure plate; 375. Reset column; 376. Connecting column; 377. Push block; 4. Top cover; 5. Fixing mechanism; 51. Moving plate; 52. H-shaped limiting plate; 53. Rotating shaft; 54. Semi-ring clamp; 55. Telescopic column one; 56. Semi-ring plate; 57. Limiting block one; 58. Telescopic column two; 59. Limiting block two; 501. Limiting column; 502. Control bar; 6. Pipeline; 7. Instrument. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1 to 3 This utility model provides an embodiment of an online testing instrument for gas cylinder safety relief valves, comprising a housing 1. A fixing plate 2 is fixedly connected to the top of the housing 1. The fixing plate 2 ensures that the components of the connecting mechanism 3 are fixed in preset positions, avoiding the impact of installation deviations on testing accuracy. A connecting mechanism 3 is fixedly connected to the inner wall of the fixing plate 2, ensuring the stability of pressure transmission during testing through rigid connection with the fixing plate 2. A top cover 4 is fixedly connected to the rear top of the housing 1, connected to the housing 1 via a hinge, facilitating subsequent maintenance of the internal fixing mechanism 5. A fixing mechanism 5 is fixedly connected to the inner wall of the top cover 4, used to fix the pipe 6 in an idle or stored state.

[0025] An instrument 7 is fixedly connected to the top of the outer casing 1, and is connected to the connecting mechanism 3 via a wire. It can receive and process pressure signals transmitted by the connecting mechanism 3 in real time. A pipe 6 is fixedly connected to the top of the connecting mechanism 3. The pipe 6 serves as a gas flow channel, with one end connected to the safety relief valve of the gas tank and the other end connected to the instrument 7 via the connecting mechanism 3. The connecting mechanism 3 includes multiple connecting pipes 31, which form the main frame of the connecting mechanism 3. These pipes have a hollow tubular structure, providing a channel for gas flow. The bottom ends of the multiple connecting pipes 31 are fixedly connected to the inner wall of the top of the fixing plate 2. This fixing method ensures no relative displacement between the connecting pipes 31 and the fixing plate 2, preventing gas leakage or pressure fluctuations due to loose connections. A fixing pipe 32 is fixedly connected to the inner wall of each of the multiple connecting pipes 31. The outer wall of the fixing pipe 32 fits tightly against the inner wall of the connecting pipe 31, providing a mounting base for the contraction column 33 and the limiting ball 34.

[0026] Multiple contraction posts 33 are fixedly connected to the outer bottom ends of multiple fixed tubes 32. When subjected to external pressure, these posts contract, causing the limiting ball 34 to contract inward. The elasticity of the limiting ball 34 ensures that it can automatically reset and lock the connection. Multiple limiting balls 34 are fixedly connected to the opposite sides of the multiple contraction posts 33. Under the action of the contraction posts 33, these balls can be embedded in the grooves on the inner wall of the connecting tube 31, achieving mechanical locking between the connecting tube 31 and the fixed tube 32, preventing them from separating under pressure, and ensuring the stability of the connection. Multiple locking blocks 36 are fixedly connected to the outer bottom ends of multiple connecting tubes 31. The locking blocks 36 are distributed on the outer wall of the connecting tube 31 to prevent the connecting tube 31 from falling out of the fixing plate 2 and to enhance the overall connection strength. Multiple contraction posts 35 are fixedly connected to the opposite sides of the multiple locking blocks 36. When it is necessary to disassemble the connecting tube 31, external pressure on the locking blocks 36 causes the contraction posts 35 to contract, making it easier for the connecting tube 31 to be removed from the fixing plate 2. An adjustment component 37 is fixedly connected to the inner wall of the top of the fixed plate 2. The adjustment component 37 is the core component that controls the opening and closing of the connection mechanism 3.

[0027] Reference Figures 2 to 4 The fixing mechanism 5 includes multiple movable plates 51, which are externally fixedly connected to the inner wall of the top cover 4. The fixing method adopts a structure in which a slider 373 cooperates with a slide rail, allowing the movable plates 51 to slide flexibly along the inner wall of the top cover 4, facilitating the adjustment of the position of the fixing mechanism 5 according to the position and number of pipes 6. H-shaped limiting plates 52 are fixedly connected to the front inner walls of each of the multiple movable plates 51. The H-shaped limiting plates 52 limit and guide the subsequent rotating shafts 53 and semi-circular clamping plates 54. Two rotating shafts 53 are rotatably connected to the inner walls of each of the multiple H-shaped limiting plates 52. The rotating shafts 53 provide a rotation fulcrum for the opening and closing of the semi-circular clamping plates 54. Semi-circular clamping plates 54 are fixedly connected to the front outer sides of each of the two rotating shafts 53. The two semi-circular clamping plates 54 cooperate to form a complete circular clamping space, which, through the fixed connection with the rotating shafts 53, can achieve the opening and closing action with the rotation of the rotating shafts 53.

[0028] Multiple telescopic columns 55 are fixedly connected to adjacent sides of the two semi-ring clamps 54. When the semi-ring clamps 54 clamp the pipe 6, they can automatically expand and contract according to the outer diameter of the pipe 6, acting as a buffer to prevent excessive clamping force from damaging the pipe 6, while ensuring that appropriate clamping force can be applied to pipes 6 of different diameters. Semi-ring plates 56 are slidably connected to adjacent sides of the two semi-ring clamps 54. The semi-ring plates 56 are made of wear-resistant and elastic material. The sliding connection with the semi-ring clamps 54 allows them to be close to the surface of the pipe 6 under the action of the telescopic columns 55, increasing the contact area with the pipe 6. Two limiting blocks 57 are fixedly connected to the upper and lower ends of the front side of the multiple movable plates 51. The limiting blocks 57 provide fixed connection points for the telescopic columns 58, ensuring that the telescopic columns 58 can pull the semi-ring clamps 54 at a suitable angle. Their robust structure can withstand the tensile force generated by the telescopic columns 58 during operation. Multiple limit blocks 57 are rotatably connected to telescopic columns 58 on their front sides. During the opening and closing of the semi-ring clamp 54, the length can be adjusted by telescopic movement, while providing pulling or pushing force to assist the semi-ring clamp 54 in completing the clamping and releasing actions, ensuring the smoothness of the action.

[0029] Two limiting blocks 59 are fixedly connected to the opposite sides of the two semi-ring clamps 54. These limiting blocks 59 cooperate with limiting block 57 to transmit the force of the telescopic column 58 to the semi-ring clamps 54, ensuring that the force of the telescopic column 58 can effectively drive the semi-ring clamps 54 to rotate around the pivot 53. Two limiting posts 501 are fixedly connected to the inner walls of the left and right sides of the multiple H-shaped limiting plates 52. The limiting posts 501 are vertically fixed to the inner walls of the H-shaped limiting plates 52, restricting their position within the top cover 4 and preventing lateral displacement during operation. Control strips 502 are fixedly connected to the front of each limiting post 501. Pushing or pulling the control strips 502 can move the limiting posts 501.

[0030] Reference Figures 1 to 3 The adjusting component 37 includes multiple sealing rings 371, the top ends of which are fixedly connected to the inner wall of the top of the fixing plate 2. This fixing method ensures the sealing rings 371 fit tightly against the inner wall of the fixing plate 2. After the connecting pipe 31 is installed, the sealing rings 371 are compressed, resulting in elastic deformation and improving the sealing effect. Control rings 372 are slidably connected to the outside of each of the multiple connecting pipes 31. The control rings 372 are annular structures that slide freely axially around the outside of the connecting pipes 31. This sliding action triggers a series of subsequent mechanical transmissions, unlocking the connecting pipes 31 from the fixing pipe 32. Multiple sliders 373 are fixedly connected to the inner wall of each of the control rings 372. These sliders 373 are evenly distributed on the inner wall of the control rings 372 and cooperate with the grooves on the outer wall of the connecting pipes 31. They can slide synchronously with the control rings 372 while also restricting the rotation of the control rings 372.

[0031] Multiple sliders 373 are each fixedly connected to a pressure plate 374 on adjacent sides. When the control ring 372 slides, the sliders 373 drive the pressure plates 374 to move up and down inside the connecting tube 31. Each pressure plate 374 has a fixedly connected reset post 375 at its top. When the pressure plate 374 is pushed upwards, the reset post 375 is compressed and stores elastic potential energy. After the control ring 372 is released, the elastic potential energy is released, pushing the pressure plate 374 back to its original position. Each pressure plate 374 has a fixedly connected connecting post 376 at its bottom. The connecting post 376 is a rigid rod-shaped structure that transmits force, synchronously transmitting the movement of the pressure plates 374 to the push block 377 at its bottom. Each connecting post 376 has a fixedly connected push block 377 at its bottom. When the connecting post 376 drives the push block 377 downwards, the inclined surface contacts the limiting ball 34 and generates a radial thrust, forcing the limiting ball 34 to retract inwards and releasing the lock on the connecting tube 31.

[0032] Multiple sealing rings 371 are externally fixedly connected to the bottom inner walls of multiple connecting pipes 31, further enhancing the sealing performance of the connection and effectively preventing leakage even under high-pressure conditions. Multiple contraction columns 35 are fixedly connected to the inner wall of the fixing plate 2 on opposite sides. When the connecting pipe 31 is installed, the locking block 36 is pressed, causing the contraction columns 35 to contract. After installation, the contraction columns 35 rebound, pushing the locking block 36 to clamp the connecting pipe 31. Multiple push blocks 377 are externally slidably connected to the outside of multiple limiting balls 34. This sliding fit allows the push blocks 377 to smoothly push the limiting balls 34 through the inclined plane, avoiding jamming. Multiple connecting columns 376 are externally slidably connected to the inside of multiple connecting pipes 31. The inner wall of the connecting pipe 31 provides guidance for the connecting columns 376, ensuring that the connecting columns 376 can only move axially.

[0033] Multiple limiting balls 34 are externally fixedly connected to the inner walls of multiple connecting tubes 31. In their natural state, some protrude from the inner walls of the connecting tubes 31 and can be locked into the slots of the fixing tubes 32. Their movable connection method ensures flexible extension and retraction. The tops of multiple reset pins 375 are fixedly connected to the inner walls of multiple connecting tubes 31. When the pressure plate 374 compresses the reset pins 375, the inner walls of the connecting tubes 31 provide a reaction force fulcrum, ensuring that the reset pins 375 can store sufficient elastic potential energy for subsequent reset. The external surfaces of multiple pressure plates 374 are slidably connected to the inside of multiple connecting tubes 31. The grooves on the inner walls of the connecting tubes 31 provide guidance for the pressure plates 374, restricting them to sliding only axially, preventing the pressure plates 374 from tilting or rotating under force, and ensuring efficient force transmission.

[0034] Multiple telescopic columns 58 are rotatably connected to the inner walls of multiple limiting blocks 59. This rotatable connection allows the telescopic columns 58 to flexibly adjust their angles as the semi-ring clamp 54 rotates, ensuring effective force transmission throughout the opening and closing process of the semi-ring clamp 54. Multiple H-shaped limiting plates 52 are externally slidably connected to the inner wall of the top cover 4. The sliding fit between the H-shaped limiting plates 52 and the top cover 4 allows the fixing mechanism 5 to be adjusted as a whole, facilitating flexible adaptation to the distribution of the pipes 6. Multiple limiting posts 501 are externally fixedly connected to the inner wall of the top cover 4. The limiting posts 501, through their fixation to the top cover 4, provide support for the control strip 502 while simultaneously limiting the movement range of the H-shaped limiting plates 52. Multiple control bars 502 are externally fixedly connected to the front inner wall of multiple H-shaped limiting plates 52. The fixed connection between the control bars 502 and the H-shaped limiting plates 52 allows the operator to directly drive the H-shaped limiting plates 52 to move through the control bars 502, thereby driving the semi-ring clamping plate 54 to complete the clamping action.

[0035] Working principle: When it is necessary to fix the connecting pipe 31 and the fixing pipe 32, the fixing pipe 32 is inserted into the inner wall of the connecting pipe 31. After the control ring 372 is released, the pressure plate 374 is reset upward under the elastic action of the top reset column 375. The squeezing force of the push block 377 on the limiting ball 34 disappears. The first contraction column 33 pushes the limiting ball 34 outward and into the corresponding slot of the fixing pipe 32. At the same time, the locking block 36 outside the connecting pipe 31 is locked with the inner wall of the fixing plate 2 under the action of the second contraction column 35. The sealing ring 371 then seals the connection part. The control ring 372... Under the action of external force, the sliding along the outside of the connecting pipe 31 drives the slider 373 fixed on the inner wall to move synchronously. The slider 373 then pushes the pressure plate 374 on the same side to slide on the inner wall of the connecting pipe 31. During the movement of the pressure plate 374, the connecting column 376 fixed at the bottom moves downward with it. The push block 377 at the bottom of the connecting column 376 then squeezes the limiting ball 34 on the inner wall of the connecting pipe 31, causing the limiting ball 34 to contract inward and release the connecting pipe 31. This achieves a convenient connection effect of quick docking, stable connection and reliable sealing between the connecting pipe 31 and the fixed pipe 32.

[0036] When it is necessary to fix the stored pipe 6, an external force is applied to the control bar 502. The control bar 502 drives the fixedly connected limiting post 501 to move on the inner wall of the top cover 4. The limiting post 501 then pushes the H-shaped limiting plate 52 to slide along the inner wall of the top cover 4. The H-shaped limiting plate 52 drives the moving plate 51 to move synchronously. At the same time, the rotating shaft 53 on the inner wall of the H-shaped limiting plate 52 adjusts its position, causing the semi-ring clamp 54 fixed outside the rotating shaft 53 to rotate. The limiting block 57 on the front side of the moving plate 51 rotates. The telescopic column 58 of the movable connection pulls the limiting block 59 on the far side of the semi-ring clamp 54, further adjusting the opening and closing angle of the semi-ring clamp 54. As the semi-ring clamp 54 gradually closes, the telescopic column 55 fixed on the near side pushes the semi-ring plate 56 towards the pipe 6. The semi-ring plate 56 slides along the inner side of the semi-ring clamp 54 and finally fits against the surface of the pipe 6, thereby achieving a tight wrapping and stable fixation of the semi-ring plate 56 on the pipe 6, effectively preventing the pipe 6 from shaking or falling off during storage.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An online testing instrument for gas cylinder safety relief valves, comprising a housing (1), characterized in that: A fixing plate (2) is fixedly connected to the top of the outer shell (1), a connecting mechanism (3) is fixedly connected to the inner wall of the fixing plate (2), a top cover (4) is fixedly connected to the rear top of the outer shell (1), a fixing mechanism (5) is fixedly connected to the inner wall of the top cover (4), an instrument (7) is fixedly connected to the top of the outer shell (1), and a pipe (6) is fixedly connected to the top of the connecting mechanism (3). The connecting mechanism (3) includes multiple connecting tubes (31), the bottom ends of the multiple connecting tubes (31) are fixedly connected to the inner wall of the top of the fixed plate (2), the inner walls of the multiple connecting tubes (31) are fixedly connected to fixed tubes (32), the bottom ends of the multiple fixed tubes (32) are fixedly connected to multiple shrinkage columns (33), the opposite sides of the multiple shrinkage columns (33) are fixedly connected to multiple limiting balls (34), the bottom ends of the multiple connecting tubes (31) are fixedly connected to multiple locking blocks (36), the opposite sides of the multiple locking blocks (36) are fixedly connected to shrinkage columns (35), and the inner wall of the top of the fixed plate (2) is fixedly connected to an adjusting component (37).

2. The online detection instrument for gas cylinder safety relief valve according to claim 1, characterized in that: The fixing mechanism (5) includes multiple movable plates (51). The exterior of the multiple movable plates (51) is fixedly connected to the inner wall of the top cover (4). H-shaped limiting plates (52) are fixedly connected to the front inner walls of the multiple movable plates (51). Two rotating shafts (53) are rotatably connected to the inner walls of the multiple H-shaped limiting plates (52). Semi-ring clamps (54) are fixedly connected to the front exterior of the two rotating shafts (53). Multiple telescopic columns (55) are fixedly connected to the adjacent sides of the two semi-ring clamps (54). (54) is slidably connected to a semi-ring plate (56) on the adjacent side. Two limiting blocks (57) are fixedly connected to the upper and lower ends of the front side of the multiple movable plates (51). Two telescopic columns (58) are rotatably connected to the front side of the multiple limiting blocks (57). Two limiting blocks (59) are fixedly connected to the distant side of the two semi-ring plates (54). Two limiting columns (501) are fixedly connected to the inner walls of the left and right sides of the multiple H-shaped limiting plates (52). A control strip (502) is fixedly connected to the front side of the multiple limiting columns (501).

3. The online detection instrument for gas cylinder safety relief valve according to claim 1, characterized in that: The adjustment assembly (37) includes multiple sealing rings (371), the top ends of which are fixedly connected to the inner wall of the top end of the fixed plate (2). Multiple control rings (372) are slidably connected to the outside of the multiple connecting pipes (31). Multiple sliders (373) are fixedly connected to the inner walls of the multiple control rings (372). A pressure plate (374) is fixedly connected to one side of each of the multiple sliders (373). A reset post (375) is fixedly connected to the top end of each of the multiple pressure plates (374). A connecting post (376) is fixedly connected to the bottom end of each of the multiple pressure plates (374). A push block (377) is fixedly connected to the bottom end of each of the multiple connecting posts (376).

4. The online detection instrument for gas cylinder safety relief valve according to claim 3, characterized in that: The top ends of the multiple sealing rings (371) are fixedly connected to the inner walls of the bottom ends of the multiple connecting pipes (31), and the opposite sides of the multiple shrinkage columns (35) are fixedly connected to the inner walls of the fixing plate (2).

5. The online testing instrument for gas cylinder safety relief valves according to claim 3, characterized in that: The bottom ends of the plurality of push blocks (377) are slidably connected to the outside of the plurality of limiting balls (34), the outside of the plurality of connecting columns (376) are slidably connected to the inside of the plurality of connecting tubes (31), and the outside of the plurality of limiting balls (34) are fixedly connected to the inner wall of the plurality of connecting tubes (31).

6. The online detection instrument for gas cylinder safety relief valve according to claim 3, characterized in that: The top ends of the plurality of reset posts (375) are fixedly connected to the inner walls of the plurality of connecting tubes (31), and the outer sides of the plurality of pressure plates (374) are slidably connected to the inner walls of the plurality of connecting tubes (31).

7. The online detection instrument for gas cylinder safety relief valve according to claim 2, characterized in that: The front sides of the multiple telescopic columns (58) are rotatably connected to the inner walls of the multiple limiting blocks (59), and the outer sides of the multiple H-shaped limiting plates (52) are slidably connected to the inner walls of the top cover (4).

8. The online detection instrument for gas cylinder safety relief valve according to claim 2, characterized in that: The external fixed connection of the plurality of limiting posts (501) is fixed to the inner wall of the top cover (4), and the external fixed connection of the plurality of control strips (502) is fixed to the front inner wall of the plurality of H-shaped limiting plates (52).

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