A pressure testing device for safety valves

Abstract

This utility model discloses a pressure resistance testing device for safety valves, belonging to the field of mechanical engineering technology. Its key technical features include a testing platform with an impact testing module fixedly connected to its top. An adjustable positioning mechanism is movably connected to the top of the testing platform, and an elastic connecting component is movably connected to the inner side of the adjustable positioning mechanism. A fixed platform capable of supporting both ends of the valve body can be set on the testing platform, along with a support plate whose angle is adjusted by a second electronic telescopic rod to adapt to the circumference of the valve body. Combined with a first electronic telescopic rod that, upon activation, drives a linkage plate to cause a fixed soft block mounted on an elastic element to softly clamp both ends of the valve body, this solution solves the problems of poor adaptability and easy damage to the valve body caused by traditional rigid clamps, leading to misjudgments of damage during impact testing. It also avoids the problems of integrated clamps being unable to adapt to valve bodies of different lengths and the need for separate installation and debugging of split clamps, resulting in a lengthy initial positioning process.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, and in particular to a pressure resistance testing device for safety valves. Background Technology

[0002] In industries such as petroleum and chemical, stainless steel safety valves are widely used for pressure system safety protection due to their excellent corrosion resistance. Their pressure resistance directly determines the safety of system operation. However, traditional testing often relies on manual operation, which has problems such as low pressure control accuracy, poor testing efficiency, and inaccurate data recording. Therefore, there is an urgent need for a dedicated pressure resistance testing device to achieve automated and high-precision testing to ensure the reliable performance of stainless steel safety valves.

[0003] In existing technologies, safety valves are typically secured by rigid clamps at both ends. However, the shapes of the valve ends are different, resulting in poor adaptability of the rigid clamps and significant clamping damage. During impact testing, clamping damage may be misjudged as minor impact damage. Furthermore, valve bodies vary in length, and existing clamps are typically either one-piece or two-piece. The former has poor adaptability and cannot accommodate valve bodies of different lengths, while the latter requires separate installation and adjustment at both ends, leading to a lengthy initial positioning process.

[0004] Therefore, a pressure resistance testing device for safety valves is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a pressure testing device for safety valves, which can solve the limitations of existing rigid clamps and their poor adaptability to valve bodies.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure resistance testing device for a safety valve, comprising a testing platform, an impact testing module fixedly connected to the top of the testing platform, an adjustable positioning mechanism movably connected to the top of the testing platform, an elastic connecting component movably connected to the inner side of the adjustable positioning mechanism, the adjustable positioning mechanism comprising two fixed platforms, the two fixed platforms being slidably connected to the two sides of the top of the testing platform respectively, two linkage plates being slidably connected to the top of the fixed platforms, and the two linkage plates being slidably connected to the front and rear sides of the top of the fixed platforms respectively, a fixing soft block being provided on the opposite side of the two linkage plates, the elastic connecting component being movably connected to the opposite side of the fixing soft block and the linkage plate, and a fixing component being movably connected to the outer side of the linkage plate.

[0007] Preferably, the elastic connection assembly includes a telescopic support column, which is fixedly connected to the side of the linkage plate near the fixed soft block, and the other end of the telescopic support column is fixedly connected to the side of the fixed soft block near the linkage plate. A telescopic guide rod is rotatably connected to the side of the linkage plate near the fixed soft block, and the other end of the telescopic guide rod is rotatably connected to the side of the fixed soft block near the linkage plate.

[0008] Preferably, a first compression spring is fixedly connected to the inner side of the telescopic support.

[0009] Preferably, a second compression spring is sleeved on the outer side of the telescopic guide rod.

[0010] Preferably, the fixing component includes two extension plates, which are respectively fixedly connected to opposite sides of the two fixing platforms.

[0011] Preferably, a first electronic telescopic rod is fixedly connected to the top of the expansion plate near the fixed platform, and a linkage rod is fixedly connected to the other end of the first electronic telescopic rod. Pull rods are rotatably connected to both sides of the linkage rod, and the other ends of the two pull rods are rotatably connected to the sides of the two linkage plates near the expansion plate, respectively.

[0012] Preferably, a threaded sleeve is fixedly connected to the outer side of the fixed platform.

[0013] Preferably, the inner side of the threaded sleeve is threadedly connected to a motor bidirectional lead screw, the motor bidirectional lead screw is movably connected to the top of the detection platform, and the top of the fixed platform is movably connected to a fixing component.

[0014] Preferably, a support rod is fixedly connected to the top of the detection platform, the support rod is set on one side opposite to the two fixed platforms, and a support plate is rotatably connected to both sides of the top of the support rod.

[0015] Preferably, a second electronic telescopic rod is rotatably connected to the bottom of the support plate, and the second electronic telescopic rod is rotatably connected to the top of the detection platform.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This application, by setting an adjustable positioning mechanism, can set a fixed platform on the testing platform that can support both ends of the valve body. It is combined with a support plate whose included angle is adjusted by a second electronic telescopic rod to adapt to the circumference of the valve body. Combined with a first electronic telescopic rod that can drive the linkage plate after activation so that the fixed soft block mounted on the elastic element can softly clamp both ends of the valve body, this solves the problem of poor self-adaptability and easy damage to the valve body caused by traditional rigid fixtures, which leads to misjudgment of damage during impact testing. It also avoids the situation that integrated fixtures cannot adapt to valve bodies of different lengths and that split fixtures need to be installed and debugged separately, resulting in a lengthy initial positioning process. This achieves safe and efficient fixing and testing of the valve body.

[0018] 2. This application, by setting up an elastic connection component, can set up an elastic element between the linkage plate and the fixed soft block, consisting of a radial telescopic support column containing a first compression spring and an oblique figure-eight telescopic guide rod containing a second compression spring. When clamping and deforming, the compression spring will contract and store energy, and achieve buffering through radial and double oblique elastic back push. After fixing, the contraction space is still retained, which not only further reduces the stress during the clamping process and reduces the detection misjudgment caused by clamping, but also solves the potential problems of residual stress and easy damage during clamping that may affect the accuracy of detection. After positioning, the valve body shell impact detection can also be completed through the impact detection module. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the pressure resistance testing device for safety valves according to this utility model;

[0020] Figure 2 This is an overall structural diagram of the adjustable positioning mechanism of this utility model;

[0021] Figure 3 This is an overall structural diagram of the elastic connection component of this utility model;

[0022] Figure 4 This is a partial structural diagram of the testing platform of this utility model;

[0023] Figure 5 This is a partial structural diagram of the support plate of this utility model.

[0024] In the diagram, 1. Detection platform; 2. Impact detection module; 3. Adjustable positioning mechanism; 31. Fixed platform; 32. Linkage plate; 33. Fixed soft block; 34. Fixed component; 3401. Expansion plate; 3402. First electronic telescopic rod; 3403. Linkage rod; 3404. Pull rod; 4. Elastic connection component; 41. Telescopic support column; 42. Telescopic guide rod; 43. First compression spring; 44. Second compression spring; 5. Threaded sleeve; 6. Motor bidirectional lead screw; 7. Support rod; 8. Support plate; 9. Second electronic telescopic rod. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-5 The present invention provides the following technical solution:

[0027] A pressure resistance testing device for a safety valve includes a testing platform 1. An impact testing module 2 is fixedly connected to the top of the testing platform 1. An adjustable positioning mechanism 3 is movably connected to the top of the testing platform 1. An elastic connecting component 4 is movably connected to the inner side of the adjustable positioning mechanism 3. The adjustable positioning mechanism 3 includes two fixed platforms 31, which are slidably connected to the two sides of the top of the testing platform 1. Two linkage plates 32 are slidably connected to the top of the fixed platforms 31, and the two linkage plates 32 are slidably connected to the front and rear sides of the top of the fixed platforms 31, respectively. A fixing soft block 33 is provided on the opposite side of the two linkage plates 32. The elastic connecting component 4 is movably connected to the opposite side of the fixing soft block 33 and the linkage plate 32. A fixing component 34 is movably connected to the outer side of the linkage plate 32.

[0028] In this embodiment: When testing stainless steel safety valves or other valves made of hard materials, in order to perform impact strength testing on their core pressure-bearing carriers such as valve bodies and flanges, traditional positioning fixtures are not used. Instead, a fixed platform 31 is set on the top of the testing platform 1 to support and fix both ends of the valve body. First, the length of the second electronic telescopic rod 9 on the top of the testing platform 1 is adjusted. The top of the testing platform 1 is equipped with two sets of support plates 8 forming an angle through the support rod 7. The second electronic telescopic rod 9 can adjust the size of the angle to adapt to the circumference of the valve body placement surface. After adjustment, the valve body is placed inside the angle, with its two ends located on the top of the two fixed platforms 31 and tending to the center. Then, the two ends are softly fixed by the fixing component 34.

[0029] Specifically, such as Figure 1 , Figure 3 As shown, the elastic connection assembly 4 includes a telescopic support column 41, which is fixedly connected to the side of the linkage plate 32 near the fixed soft block 33, and the other end of the telescopic support column 41 is fixedly connected to the side of the fixed soft block 33 near the linkage plate 32. A telescopic guide rod 42 is rotatably connected to the side of the linkage plate 32 near the fixed soft block 33, and the other end of the telescopic guide rod 42 is rotatably connected to the side of the fixed soft block 33 near the linkage plate 32.

[0030] Specifically, such as Figure 1 , Figure 3 As shown, a first compression spring 43 is fixedly connected to the inner side of the telescopic support column 41.

[0031] Specifically, such as Figure 1 , Figure 3 As shown, a second compression spring 44 is sleeved on the outer side of the telescopic guide rod 42.

[0032] In this embodiment: to reduce stress and detection errors during clamping, an elastic element is provided between the linkage plate 32 and the fixed soft block 33. The elastic element consists of multiple sets of telescopic support columns 41 radially arranged at the center of the opposite surfaces of the two, with a first compression spring 43 inside, and multiple sets of telescopic guide rods 42 that rotate obliquely in a figure-eight shape and are respectively connected at their two ends to the opposite non-central positions of the two, and a second compression spring 44 sleeved on the outside. When clamping and deformation pushing, these components will contract to compress the springs to store elastic potential energy, and buffer through radial and double oblique elastic back push. After fixing, there is still a contraction space to reduce false judgments. After positioning, the impact detection module 2 impacts the valve body shell to complete the impact detection.

[0033] Specifically, such as Figure 2 As shown, the fixing component 34 includes two expansion plates 3401, which are fixedly connected to opposite sides of the two fixing platforms 31.

[0034] Specifically, such as Figure 2 As shown, a first electronic telescopic rod 3402 is fixedly connected to the top of the expansion plate 3401 near the fixed platform 31, and a linkage rod 3403 is fixedly connected to the other end of the first electronic telescopic rod 3402. Pull rods 3404 are rotatably connected to both sides of the linkage rod 3403, and the other ends of the two pull rods 3404 are respectively rotatably connected to the side of the two linkage plates 32 near the expansion plate 3401.

[0035] In this embodiment: by activating the first electronic telescopic rod 3402 at the top of the outer extension plate 3401 of the fixed platform 31 to retract it, the linkage rod 3403 will be pulled away from the fixed platform 31, causing the pull rods 3404 on both sides of the linkage rod 3403 to rotate toward the linkage rod 3403 and the included angle to decrease, thereby driving the linkage plates 32 on both sides of the top of the fixed platform 31 to slide inward at the same time. The linkage plates 32, through the fixed soft blocks 33 mounted on the elastic element, will then softly clamp the two sides of the valve body from both sides inward. After the fixed soft blocks 33 contact the surface of the valve body, they will not immediately be fully pressed, but will deform and fit the surfaces of both ends of the valve body during the gradual pressing, and finally achieve soft fixation at both ends.

[0036] Specifically, such as Figure 1 , Figure 4 As shown, a threaded sleeve 5 is fixedly connected to the outer side of the fixed platform 31.

[0037] Specifically, such as Figure 1 , Figure 4 As shown, the inner thread of the threaded sleeve 5 is connected to the motor bidirectional lead screw 6, which is movably connected to the top of the detection platform 1. The top of the fixed platform 31 is movably connected to the fixing component 34.

[0038] In this embodiment: by activating the bidirectional lead screw 6 of the motor at the top of the detection platform 1, the two fixed platforms 31 are respectively connected to the opposite sides of the threads of the bidirectional lead screw 6 through their external threaded sleeves 5. Under the drive, they slide inward or outward along the sliding limit structure at the top of the detection platform 1 to adjust the spacing to adapt to the processing conditions.

[0039] Specifically, such as Figure 1 , Figure 5 As shown, a support rod 7 is fixedly connected to the top of the detection platform 1. The support rod 7 is set on one side opposite to the two fixed platforms 31. Support plates 8 are rotatably connected to both sides of the top of the support rod 7.

[0040] Specifically, such as Figure 1 , Figure 5 As shown, a second electronic telescopic rod 9 is rotatably connected to the bottom of the support plate 8, and the second electronic telescopic rod 9 is rotatably connected to the top of the detection platform 1.

[0041] In this embodiment: by adjusting the length of the second electronic telescopic rod 9 at the top of the detection platform 1, the top of the detection platform 1 is equipped with two sets of support plates 8 forming an angle via support rod 7. The second electronic telescopic rod 9 can adjust the size of the angle to adapt to the circumference of the valve body placement surface.

[0042] Working Principle: When performing pressure resistance testing on stainless steel safety valves or other valves made of hard materials, it is usually necessary to conduct impact testing on their outer shell to test the strength of the core pressure-bearing carrier of the safety valve, such as the valve body and flange. However, in existing technologies, the safety valve is usually fixed by setting rigid clamps at both ends. On the one hand, the shapes of the two ends of the valve are different, the rigid clamps have poor adaptability, and the clamping damage is relatively large. During impact testing, clamping damage may be misjudged as minor impact damage. On the other hand, the valve body lengths are different, and existing clamps are usually either one-piece or two-piece. The former has poor adaptability and cannot adapt to valve bodies of different lengths, while the latter requires separate installation and adjustment at both ends, resulting in a lengthy initial positioning process. To avoid this... In this case, traditional positioning fixtures are no longer used. Instead, a fixed platform 31 is installed on the top of the detection platform 1 to support and fix both ends of the valve body. Before positioning both ends of the valve body on the top of the fixed platform 31, the following adjustments can be made: First, start the motor bidirectional lead screw 6 located on the top of the detection platform 1. The two fixed platforms 31 are threadedly connected to opposite sides of the motor bidirectional lead screw 6 via their external threaded sleeves 5. During the driving process of the motor bidirectional lead screw 6, the two fixed platforms 31 can slide simultaneously inward and outward along the sliding limit structure on the top of the detection platform 1, thereby achieving the effect of adjusting the spacing and adapting to the processing conditions. After this adjustment is completed, the length of the second electronic telescopic rod 9 on the top of the detection platform 1 is adjusted. The angle is adjusted simultaneously. Two sets of support plates 8 are mounted on the top of the detection platform 1 via support rods 7, forming an angle. The size of this angle can be adjusted using the second electronic telescopic rod 9 to fit the circumference of the valve body placement surface. After the above pre-adjustment is completed, the valve body is placed inside the angle, with its two ends positioned on the top of the two fixed platforms 31 and approaching the center position. By activating the first electronic telescopic rod 3402 located on the top of the outer extension plate 3401 of the fixed platform 31, the first electronic telescopic rod 3402 retracts. At this time, the first electronic telescopic rod 3402 pulls the linkage rod 3403 to move away from the fixed platform 31. The pull rods 3404 on both sides of the linkage rod 3403 rotate towards the linkage rod 3403 and reduce... The included angle between the two pull rods 3404 is such that, during this process, since the other end of the pull rod 3404 is rotatably connected to the linkage plate 32, its actual function is to drive the linkage plates 32 on both sides of the top of the fixed platform 31 to slide inward simultaneously. The linkage plate 32 is supported by a fixed soft block 33 through an elastic element, so that the fixed soft block 33 simultaneously clamps the valve body from both sides inward. After the fixed soft block 33 contacts the valve body surface, it will not be completely pressed, but will deform and fit against the surface of both ends of the valve body during the gradual pressing process, ultimately achieving the effect of soft fixation at both ends. In order to further reduce the stress during the clamping process and further reduce the detection misjudgment caused by clamping, an elastic element is provided between the linkage plate 32 and the fixed soft block 33.The elastic element mainly consists of multiple sets of radially arranged telescopic support columns 41 positioned at the center of the opposing surfaces of the linkage plate 32 and the fixed soft block 33, and multiple sets of obliquely rotating telescopic guide rods 42 arranged in a figure-eight shape, with their ends rotatably connected to the linkage plate 32 and the fixed soft block 33 at relatively off-center positions. During the aforementioned clamping process and the continued pushing process of deformation, the telescopic support columns 41 and their internal first compression springs 43, as well as the telescopic guide rods 42 and their externally sleeved second compression springs 44, will all vertically contract and rotate to compress the first compression springs 43 and the second compression springs 44, accumulating elastic potential energy. This generates elastic back thrust in the radial and double oblique directions, thus buffering the entire component during the clamping process. After fixing, it still has room for contraction, which can reduce the detection misjudgment problem caused by clamping damage. After the above positioning, the valve body shell can be impacted by the impact detection module 2 to achieve impact detection. In summary, this optimizes the pressure resistance detection device for the safety valve.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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. A pressure resistance testing device for a safety valve, comprising a testing platform (1), characterized in that: The top of the detection platform (1) is fixedly connected to an impact detection module (2), and the top of the detection platform (1) is movably connected to an adjustable positioning mechanism (3). The inner side of the adjustable positioning mechanism (3) is movably connected to an elastic connecting component (4). The adjustable positioning mechanism (3) includes two fixed platforms (31), which are slidably connected to the two sides of the top of the detection platform (1). The top of the fixed platform (31) is slidably connected to two linkage plates (32), which are slidably connected to the front and rear sides of the top of the fixed platform (31). A fixed soft block (33) is provided on the opposite side of the two linkage plates (32). The elastic connecting component (4) is movably connected to the opposite side of the fixed soft block (33) and the linkage plate (32). The outer side of the linkage plate (32) is movably connected to a fixed component (34).

2. The pressure resistance testing device for a safety valve according to claim 1, characterized in that: The elastic connection assembly (4) includes a telescopic support column (41), which is fixedly connected to the side of the linkage plate (32) near the fixed soft block (33), and the other end of the telescopic support column (41) is fixedly connected to the side of the fixed soft block (33) near the linkage plate (32). A telescopic guide rod (42) is rotatably connected to the side of the linkage plate (32) near the fixed soft block (33), and the other end of the telescopic guide rod (42) is rotatably connected to the side of the fixed soft block (33) near the linkage plate (32).

3. The pressure resistance testing device for a safety valve according to claim 2, characterized in that: The inner side of the telescopic support (41) is fixedly connected to a first compression spring (43).

4. The pressure resistance testing device for a safety valve according to claim 2, characterized in that: A second compression spring (44) is sleeved on the outside of the telescopic guide rod (42).

5. The pressure resistance testing device for a safety valve according to claim 1, characterized in that: The fixing component (34) includes two expansion plates (3401), which are fixedly connected to opposite sides of the two fixing platforms (31).

6. The pressure resistance testing device for a safety valve according to claim 5, characterized in that: The top of the expansion plate (3401) is fixedly connected to the side of the fixed platform (31) with a first electronic telescopic rod (3402), and the other end of the first electronic telescopic rod (3402) is fixedly connected to a linkage rod (3403). Both sides of the linkage rod (3403) are rotatably connected to pull rods (3404), and the other ends of the two pull rods (3404) are respectively rotatably connected to the side of the two linkage plates (32) near the expansion plate (3401).

7. The pressure resistance testing device for a safety valve according to claim 1, characterized in that: The fixed platform (31) is fixedly connected to a threaded sleeve (5) on its outer side.

8. A pressure resistance testing device for a safety valve according to claim 7, characterized in that: The inner thread of the threaded sleeve (5) is connected to a motor bidirectional lead screw (6), which is movably connected to the top of the detection platform (1). The top of the fixed platform (31) is movably connected to a fixing component (34).

9. A pressure resistance testing device for a safety valve according to claim 1, characterized in that: The top of the detection platform (1) is fixedly connected to a support rod (7), which is set on one side opposite to the two fixed platforms (31). Both sides of the top of the support rod (7) are rotatably connected to a support plate (8).

10. A pressure resistance testing device for a safety valve according to claim 9, characterized in that: The bottom of the support plate (8) is rotatably connected to a second electronic telescopic rod (9), which is rotatably connected to the top of the detection platform (1).

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