A constant-volume pushing butterfly valve sealing test equipment, a butterfly valve interface structure and a connecting method thereof

Abstract

The application relates to the technical field of force induction control, in particular to a constant-volume pushing butterfly valve sealing test equipment, a butterfly valve interface structure and a connecting method thereof, which comprises a rack, a driving assembly arranged on the rack, a rack plate connected to the driving assembly, a plurality of pump pressure assemblies arranged on the rack and connected to the same group of conveying pipes, a gear wheel matched with the rack plate and arranged on each pump pressure assembly, a pressure induction structure connected to the conveying pipe, an elastic retaining assembly in sliding connection with a capacity delay groove arranged on the pressure induction structure, the elastic retaining assembly being capable of moving relative to the capacity delay groove when the pressure induction structure measures that the pressure value in the conveying pipe reaches a preset value, and a traction structure connected to the rack plate and the elastic retaining assembly, the traction structure being capable of driving the rack plate to separate from one or more gear wheels when the elastic retaining assembly moves relative to the capacity delay groove, so that the detection precision is improved.

Description

Technical Field

[0001] This invention relates to the field of force sensing and control technology, specifically to a constant-volume push butterfly valve sealing test device, a butterfly valve interface structure, and a connection method thereof. Background Technology

[0002] Butterfly valves, as key equipment in the field of industrial fluid control, can precisely regulate the on / off state and flow rate of pipeline media by means of the rotational movement of the valve plate. They are widely used in many industries such as petroleum, chemical, and water treatment, and play an indispensable role in stabilizing the flow rate and pressure of fluids in the system and ensuring safe and stable production.

[0003] In practical applications of butterfly valves, sealing performance is crucial, directly affecting the valve's quality and reliability. To ensure that butterfly valves maintain a good sealing state under various operating conditions and prevent safety accidents caused by media leakage, strict sealing tests are required during the production process. According to industry standards, the internal pressure of a butterfly valve must reach 1.1 times the design pressure during airtightness testing. This standard is the result of comprehensive consideration from multiple aspects. It can simulate the slight overpressure situation that butterfly valves may face in actual operation, verify their sealing performance under normal operating pressure and moderate overpressure, and detect minor defects and impurities on the sealing surface in advance, avoiding sealing failure due to pressure fluctuations and ensuring the safety and stability of the butterfly valve during use.

[0004] However, current butterfly valve sealing testing equipment has some shortcomings. The pumping unit relies on a built-in pressure sensor, stopping pumping when the internal pressure of the butterfly valve reaches 1.1 times the design pressure. However, the pressure sensor is susceptible to interference from external factors such as temperature and humidity during the testing process, leading to a decrease in testing accuracy. Moreover, the pressure sensor and the pumping unit are connected via electrical signals, resulting in a communication delay. Although the delay is short, it significantly affects the accuracy of the butterfly valve's internal pressure readings, thus reducing testing precision and failing to meet the requirements for high-precision testing. Summary of the Invention

[0005] The purpose of this invention is to provide a butterfly valve sealing test device with constant volume push, a butterfly valve interface structure and its connection method, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A sealing test device for a constant-volume push butterfly valve includes:

[0008] A frame, on which a drive assembly is mounted, and a rack plate is connected to the drive assembly;

[0009] Multiple pump pressure assemblies are mounted on the frame and connected to the same set of delivery pipes. Each set of pump pressure assemblies is equipped with a gear that is compatible with the rack plate.

[0010] A pressure sensing structure is connected to the delivery pipe, and the pressure sensing structure is used to measure the air pressure value in the delivery pipe;

[0011] The elastic retaining component is slidably connected to the hysteresis groove provided on the pressure sensing structure. When the pressure sensing structure measures that the pressure value in the delivery pipe reaches a preset value, the elastic retaining component can actively move relative to the hysteresis groove.

[0012] A traction structure connects the rack plate and the elastic retaining assembly. When the elastic retaining assembly actively moves relative to the hysteresis groove, the traction structure can drive the rack plate to separate from one or more sets of gears.

[0013] As a further aspect of the present invention: the pressure sensing structure includes a hysteresis cylinder disposed on the drive assembly, the hysteresis cylinder being connected to the delivery pipe, and a second sealing plug being slidably installed inside the hysteresis cylinder, an extension frame penetrating the hysteresis cylinder being connected to the second sealing plug, a first cylindrical spring being sleeved on the extension frame, one end of the first cylindrical spring being connected to the second sealing plug, and the other end being connected to the interior of the hysteresis cylinder;

[0014] The hysteresis groove is disposed on the extension frame.

[0015] As a further embodiment of the present invention: the elastic retaining component includes multiple sets of grooved wheels that are rolled in the hysteresis groove, the multiple sets of grooved wheels are connected to a horizontally arranged follower rod, and the follower rod is connected to the traction structure;

[0016] The elastic retaining component also includes an energy storage structure disposed on the follower rod and a guide plate connected to the drive component. The energy storage structure is provided with two sets of embedded shafts, which are capable of rolling within guide grooves formed on the guide plate.

[0017] As a further embodiment of the present invention: the energy storage structure includes a slide groove arranged along the length direction of the follower rod, two sets of sliders are symmetrically installed in the slide groove, the sliders are rotatably connected to the embedded shaft, and the sliders are slidably connected to the transverse shaft arranged in the slide groove;

[0018] A second cylindrical spring is fitted onto the horizontal axis, and the two ends of the second cylindrical spring are respectively connected to the two sets of sliders.

[0019] As a further embodiment of the present invention: the guide groove includes two sets of inclined grooves disposed on the guide plate, and the connection of the two sets of inclined grooves forms an outward protrusion protruding toward the hysteresis groove;

[0020] After the embedded shaft moves along one set of inclined grooves to the outward protrusion, the embedded shaft can actively move along another set of inclined grooves.

[0021] As a further embodiment of the present invention: the traction structure includes a side slide frame slidably connected to the drive assembly, one end of the side slide frame is provided with a traction shaft, and a lifting component connected to the rack plate is slidably mounted on the traction shaft;

[0022] The traction structure also includes a hysteresis kit disposed between the side slide and the follower rod.

[0023] As a further embodiment of the present invention: the hysteresis kit includes an extension rod connected to the follower rod and a hollow groove disposed on the side slide, wherein the end of the extension rod away from the follower rod can move within the hollow groove.

[0024] As a further embodiment of the present invention: the pump pressure assembly includes a pump pressure cylinder body disposed on the frame, a first sealing plug is slidably installed inside the pump pressure cylinder body, a connecting shaft passing through the pump pressure cylinder body is connected to the first sealing plug, and a hinge rod is rotatably installed on the connecting shaft;

[0025] A connecting ring is coaxially mounted on the gear, and the hinge rod is rotatably connected to the connecting ring at an eccentric position.

[0026] A butterfly valve interface structure, tested using the aforementioned constant-volume push butterfly valve sealing test equipment, includes:

[0027] The butterfly valve body and the connecting pipes at both ends thereof, the butterfly valve body having multiple sets of guide shafts equidistantly arranged in a circle, the connecting pipe having an outwardly protruding aligning component on its side, the guide shafts being adapted to the aligning component;

[0028] The alignment component has a V-shaped groove and a locking groove, and the V-shaped groove can guide the guide shaft to move into the locking groove.

[0029] A connection method, applied to the aforementioned butterfly valve interface structure, includes making the butterfly valve body and the connecting pipe coaxial, first aligning the alignment component with the guide shaft, then positioning the guide shaft within the opening area of ​​the V-groove, and finally moving the butterfly valve body and the connecting pipe closer to each other. Guided by the V-groove, the guide shaft can move towards the locking groove, and when the guide shaft enters the locking groove, the butterfly valve body and the connecting pipe are connected by bolts.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] By setting up the drive components and multiple pump components, the compressed gas can be rushed into the butterfly valve at a relatively fast speed during the initial stage of inflation, so that the pressure inside the butterfly valve can quickly approach the calibrated pressure during testing.

[0032] By incorporating a pressure-sensing structure, an elastic retaining component, and a traction structure, the rack and pinion plate can be rapidly driven to move when the internal pressure of the butterfly valve is about to reach the calibrated value. This causes the rack and pinion plate to separate from one or more sets of pump pressure components, thereby reducing the speed at which compressed gas is delivered into the butterfly valve. As a result, the internal pressure of the butterfly valve can increase at a more slow rate when it is about to reach the calibrated pressure value. During this process, the stopping time of the drive components can be more precisely controlled to ensure that the internal pressure of the butterfly valve meets the testing standards and improves the testing accuracy. Attached Figure Description

[0033] Figure 1 A schematic diagram of one embodiment of a butterfly valve sealing test device for constant volume push.

[0034] Figure 2 A schematic diagram of the structure of a butterfly valve sealing test device with the frame removed in one embodiment.

[0035] Figure 3 This is a schematic diagram of the structure of a butterfly valve sealing test device with the frame removed, taken from another angle in one embodiment.

[0036] Figure 4 A schematic diagram of the drive assembly and pump pressure assembly in one embodiment of a butterfly valve sealing test device for constant volume push.

[0037] Figure 5 A schematic diagram of the pump pressure assembly in one embodiment of a butterfly valve sealing test device for constant volume push.

[0038] Figure 6 An exploded view of the drive component structure in one embodiment of a butterfly valve sealing test device for constant volume push.

[0039] Figure 7 A schematic diagram of the pressure sensing structure, elastic retaining component, and traction structure in one embodiment of a butterfly valve sealing test device for constant volume push.

[0040] Figure 8 A schematic diagram of the pressure sensing structure in one embodiment of a butterfly valve sealing test device for constant volume push.

[0041] Figure 9 An exploded view of the structure of the elastic retaining component in one embodiment of a butterfly valve sealing test device for constant volume push.

[0042] Figure 10 This is a schematic diagram of one embodiment of the butterfly valve interface structure.

[0043] Figure 11 This is an exploded view of one embodiment of the butterfly valve interface structure.

[0044] In the diagram: 1. Frame; 2. Support frame; 3. Drive unit; 4. Eccentric component; 5. Cam shaft; 6. Lateral component; 7. Guide rod; 8. Lifting component; 9. Rack plate; 10. Pump cylinder body; 11. First sealing plug; 12. Connecting shaft; 13. Hinge rod; 14. Connecting ring; 15. Gear; 16. Hysteresis cylinder body; 17. Second sealing plug; 18. First cylindrical spring; 19. Extension frame; 1901. Hysteresis groove; 2 0. Follower rod; 2001. Slide groove; 21. Grooved wheel; 22. Slider; 23. Horizontal shaft; 24. Second cylindrical spring; 25. Embedded shaft; 26. Guide plate; 2601. Inclined groove; 27. Extension rod; 28. Side slide; 2801. Hollow groove; 29. ​​Pulling shaft; 30. Butterfly valve body; 3001. Guide shaft; 31. Connecting pipe; 32. Alignment component; 3201. V-groove; 3202. Locking groove. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0047] Please see Figures 1-11 In this embodiment of the invention, a butterfly valve sealing test device with constant volume push includes: a frame 1, multiple pump pressure components, a pressure sensing structure, an elastic holding component, and a traction structure.

[0048] A drive assembly is provided on the frame 1, and a rack plate 9 is connected to the drive assembly. For example, the drive assembly includes a support frame 2 provided on the frame 1, a drive device 3 is installed on the support frame 2, an eccentric member 4 is connected to the output shaft of the drive device 3, and a convex shaft 5 is provided on the eccentric member 4.

[0049] The drive assembly also includes a guide rod 7 mounted on the support frame 2, a transverse member 6 slidably mounted on the guide rod 7, the transverse member 6 having a fitting groove along its length, and the convex shaft 5 being able to roll within the fitting groove.

[0050] In this embodiment, the controller drive device 3 operates, which can drive the eccentric part 4 connected to its output shaft to perform a circular motion. At this time, the cam shaft 5 will perform a circular motion, and the cam shaft 5 is slidably set in the fitting groove, so that when the cam shaft 5 performs a circular motion, the transverse part 6 can reciprocate along the length direction of the guide rod 7, and thereby drive the rack plate 9 to reciprocate. During this process, multiple pump pressure components can operate synchronously to fill the butterfly valve with compressed gas, so that the butterfly valve can generate a predetermined air pressure value.

[0051] The rack plate 9 and the transverse moving member 6 are slidably connected, so that when the rack plate 9 moves in the vertical direction, it can separate from the corresponding pump pressure assembly, causing one or more sets of pump pressure assemblies to operate, thereby reducing the speed at which compressed gas is pumped into the butterfly valve. This ensures that when the internal pressure of the butterfly valve is about to reach a predetermined value, gas can be pumped into the butterfly valve at a relatively slow speed, making the rate of gas pressure increase more controllable when the internal pressure of the butterfly valve reaches the predetermined value. This avoids excessive or insufficient internal pressure of the butterfly valve caused by the difficulty in controlling the stopping time of the drive device 3.

[0052] Furthermore, the movement direction of the transverse component 6 is perpendicular to the movement direction of the rack plate 9. This ensures that when the transverse component 6 reciprocates, it will not generate a component force that causes the rack plate 9 to move in the vertical direction. At the same time, when the rack plate 9 moves in the vertical direction, it will not generate a component force that hinders the reciprocating movement of the transverse component 6. This improves the stability of each component during its respective movement and avoids the generation of additional loads.

[0053] It should be noted that the above-mentioned drive components can also take other forms, including but not limited to cylinder drive and reciprocating linear drive modules. As long as they can drive the rack plate 9 to reciprocate, they can be selected according to the actual situation.

[0054] Please see Figures 4-5 Multiple sets of the pump pressure assembly are mounted on the frame 1 and connected to the same set of delivery pipes 33. Each set of the pump pressure assembly is equipped with a gear 15 that is compatible with the rack plate 9.

[0055] The pump assembly includes a pump cylinder body 10 disposed on the frame 1. A first sealing plug 11 is slidably installed inside the pump cylinder body 10. A connecting shaft 12 that passes through the pump cylinder body 10 is connected to the first sealing plug 11. A hinge rod 13 is rotatably installed on the connecting shaft 12.

[0056] A connecting ring 14 is coaxially mounted on the gear 15. The hinge rod 13 is rotatably connected to the connecting ring 14 at an eccentric position. The pump cylinder 10 is provided with two types of one-way valves. One set of one-way valves is directed from the inside of the pump cylinder 10 toward the delivery pipe 33, and the other set of one-way valves is directed from the outside toward the inside of the pump cylinder 10.

[0057] For example, in this embodiment, two sets of pump pressure assemblies are provided. The two sets of pump pressure assemblies have the same structure. The difference is that the diameter of the pump cylinder 10 and the diameter of the first sealing plug 11 in one set of pump pressure assemblies are smaller than those in the other set of pump pressure assemblies. In the specific working process, in the initial state, the gears 15 on both sets of pump pressure assemblies are engaged with the rack plate 9. At this time, during the reciprocating motion of the rack plate 9, the two sets of pump pressure assemblies can move synchronously and jointly deliver compressed gas into the delivery pipe 33, so that the pressure inside the butterfly valve can be quickly established and the established pressure value can be quickly approached towards the preset value. In this process, the speed at which the pressure inside the butterfly valve reaches the preset value can be shortened.

[0058] When the internal pressure of the butterfly valve reaches the preset value, the rack 9 can be pulled upwards under the action of the pressure sensing structure, the elastic holding component, and the traction structure. At this time, the rack 9 can separate from the gear 15 connected to one of the pump components. This ensures that after the internal pressure of the butterfly valve reaches the preset value, only one set of pump components delivers compressed gas into the butterfly valve (specifically, the set of pump components with a smaller diameter than the pump cylinder 10 and the first sealing plug 11) is activated. As the internal pressure of the butterfly valve approaches the predetermined value from the preset value, the internal pressure can increase more slowly. This makes it more controllable when the internal pressure of the butterfly valve reaches the predetermined value, avoiding overcharging of the butterfly valve due to the difficulty in controlling the timing, which could damage the internal seals, or low detection accuracy due to the internal pressure not reaching the predetermined value. This ensures that the internal pressure of the butterfly valve can be controlled closer to the predetermined value during the detection process, thus improving detection accuracy.

[0059] Regarding the aforementioned preset and predetermined values, the preset value refers to the critical value at which the butterfly valve switches from rapid to slow pressure. After the internal pressure of the butterfly valve reaches this value, the number of pump components will change, thereby slowing down the pressure speed towards the inside of the butterfly valve. This ensures that the pressure inside the butterfly valve increases more controllably from the preset value to the predetermined value. The predetermined value refers to the nominal pressure that the butterfly valve can withstand during the process of testing its internal sealing performance. Testing the sealing performance of the butterfly valve under this pressure will yield more representative results under extreme conditions.

[0060] Furthermore, during the reciprocating motion of the rack plate 9, the gear 15 meshing with it will also reciprocate. Specifically, during one reciprocating deflection of the rack plate 9, the gear 15 can rotate one revolution back and forth. During this process, the connecting ring 14 pulls and pushes the connecting shaft 12 through the hinge rod 13, so that the first sealing plug 11 can reciprocate within the pump cylinder 10 to draw external air into the pump cylinder 10 and compress the gas drawn into the pump cylinder 10 into the delivery pipe 33.

[0061] Please see Figures 7-8 The pressure sensing structure is connected to the delivery pipe 33, and the pressure sensing structure is used to measure the air pressure value inside the delivery pipe 33;

[0062] The pressure sensing structure includes a hysteresis cylinder 16 disposed on the drive assembly. The hysteresis cylinder 16 is connected to the delivery pipe 33, and a second sealing plug 17 is slidably installed inside the hysteresis cylinder 16. An extension frame 19 that penetrates the hysteresis cylinder 16 is connected to the second sealing plug 17. A first columnar spring 18 is sleeved on the extension frame 19. One end of the first columnar spring 18 is connected to the second sealing plug 17, and the other end is connected to the interior of the hysteresis cylinder 16.

[0063] The hysteresis groove 1901 is disposed on the extension frame 19.

[0064] Since the hysteresis cylinder 16 is connected to the delivery pipe 33, and the delivery pipe 33 is connected to the inside of the butterfly valve, when pressure is built up inside the butterfly valve, the inside of the butterfly valve, the inside of the delivery pipe 33, and the inside of the hysteresis cylinder 16 are under the same pressure. As the pressure rises, the second sealing plug 17 is pushed upward, compressing the first cylindrical spring 18 and driving the extension frame 19 to move upward. The movement of the extension frame 19 allows for a more intuitive observation of the pressure change inside the butterfly valve. The movement of the extension frame 19 can also synchronously drive the elastic holding component to move, and use the traction structure to drive the rack plate 9 to move, thereby changing the number of actions of the pump pressure component to slow down the inflation speed towards the inside of the butterfly valve. Compared with the use of electronic air pressure sensors, this application uses a mechanical measurement method and uses mechanical triggering to control the movement of the rack plate 9, which reduces the action delay, greatly avoids overfilling or falling below the calibrated air pressure value inside the butterfly valve, and improves the accuracy of the detection results.

[0065] Please see Figure 7 , Figure 9 The elastic retaining component is slidably connected to the hysteresis groove 1901 provided on the pressure sensing structure. When the pressure sensing structure measures that the pressure value in the delivery pipe 33 reaches a preset value, the elastic retaining component can actively move relative to the hysteresis groove 1901.

[0066] The elastic retaining assembly includes multiple sets of grooved wheels 21 that are rolled in the hysteresis groove 1901. The multiple sets of grooved wheels 21 are connected to horizontally arranged follower rods 20, and the follower rods 20 are connected to the traction structure.

[0067] The elastic retaining assembly further includes an energy storage structure disposed on the follower rod 20 and a guide plate 26 connected to the drive assembly. The energy storage structure is provided with two sets of embedded shafts 25, which can roll within guide grooves formed on the guide plate 26. The energy storage structure includes a slide groove 2001 disposed along the length direction of the follower rod 20. Two sets of sliders 22 are symmetrically installed in the slide groove 2001. The sliders 22 are rotatably connected to the embedded shafts 25, and the sliders 22 are slidably connected to a transverse shaft 23 disposed in the slide groove 2001.

[0068] A second cylindrical spring 24 is sleeved on the horizontal shaft 23, and the two ends of the second cylindrical spring 24 are respectively connected to the two sets of sliders 22;

[0069] The guide groove includes two sets of inclined grooves 2601 disposed on the guide plate 26, and the connection of the two sets of inclined grooves 2601 forms an outward protrusion protruding toward the hysteresis groove 1901.

[0070] When the embedded shaft 25 moves along one set of inclined grooves 2601 to the outward protrusion, the embedded shaft 25 can actively move along another set of inclined grooves 2601.

[0071] In the initial state, the second cylindrical spring 24 is compressed, and the embedded shaft 25 is located at the end of the lower inclined groove 2601 away from the protrusion. Since the second cylindrical spring 24 tends to act in the opposite direction on the embedded shaft 25, the embedded shaft 25 tends to be stably positioned at the lower end of the inclined groove 2601 without external force intervention. Simultaneously, the grooved wheel 21 is in contact with the lower end of the hysteresis groove 1901. When the pressure inside the butterfly valve increases, the extension frame 19 will move upwards. At this time, the hysteresis groove 1901 can drive the grooved wheel 21 to move upwards, and the... When the lever 20 moves upward, the embedded shaft 25 moves along the inclined groove 2601 toward the outward protrusion, and the second column spring 24 is further compressed. When the pressure inside the butterfly valve reaches the preset value, the embedded shaft 25 moves to the position of the outward protrusion. After the embedded shaft 25 moves past the outward protrusion, the second column spring 24 will release elastic potential energy and drive the embedded shaft 25 to move upward along another inclined groove 2601. At this time, the groove wheel 21 can roll in the hysteresis groove 1901 and drive the rack plate 9 to change position through the traction structure, so as to change the speed at which compressed air is injected into the butterfly valve.

[0072] It should be noted that the length of the hysteresis groove 1901 is the same as the distance between the ends of the two sets of inclined grooves 2601 away from the protrusion. This allows the grooved wheel 21 to move along the length of the hysteresis groove 1901 when the embedded shaft 25 moves along the upper inclined groove 2601 and drives the follower rod 20 to move upward. In other words, during this process, the active upward movement of the follower rod 20 will not drive the extension frame 19 to move upward, making its detection of the internal pressure of the butterfly valve more accurate.

[0073] Please see Figure 7 The traction structure connects the rack plate 9 and the elastic retaining component. When the elastic retaining component moves actively relative to the hysteresis groove 1901, the traction structure can drive the rack plate 9 to separate from one or more sets of gears 15. The traction structure includes a side slide 28 that is slidably connected to the drive component. One end of the side slide 28 is provided with a traction shaft 29. A lifting component 8 connected to the rack plate 9 is slidably mounted on the traction shaft 29.

[0074] The traction structure also includes a hysteresis kit disposed between the side slide 28 and the follower rod 20. The hysteresis kit includes an extension rod 27 connected to the follower rod 20 and a hollow groove 2801 disposed on the side slide 28. The end of the extension rod 27 away from the follower rod 20 can move within the hollow groove 2801.

[0075] In the initial state, the rack plate 9 can mesh with the gears 15 on the two sets of pump pressure components, and the extension rod 27 is in a state of abutting against the lower end of the hollow groove 2801. In the initial state, without external force intervention, the embedded shaft 25 has a stable tendency to be at the lower end of the inclined groove 2601, which makes the position of the extension rod 27 relative to the hollow groove 2801 more stable and ensures the meshing state between the rack plate 9 and the two sets of gears 15.

[0076] As the internal pressure of the butterfly valve increases, the extension frame 19 moves upward, and the embedded shaft 25 moves to the outer protrusion, the follower rod 20 will drive the extension rod 27 to move within the hollow groove 2801 until it abuts against its top. This allows the side slide frame 28 to slide upward using the follower rod 20 and the extension rod 27 when the embedded shaft 25 actively moves within the upper inclined groove 2601, thereby driving the rack plate 9 to move upward and separate it from one of the gears 15. During the reciprocating motion, only one set of gears 15 is driven to rotate, reducing the speed at which compressed gas is delivered into the butterfly valve.

[0077] It is worth noting that when the embedded shaft 25 moves from the outer protrusion toward the upper inclined groove 2601, the second columnar spring 24 can cause the height of the follower rod 20 to change rapidly by releasing elastic potential energy instantaneously. This rapid change can cause the height of the side slide 28 to change rapidly and the height of the rack plate 9 to change rapidly, thereby causing it to quickly separate from one of the gears 15. While ensuring continuous filling of compressed gas toward the butterfly valve, the inflation speed is reduced in a timely and effective manner.

[0078] Please see Figures 10-11 As one embodiment of the present invention, a butterfly valve interface structure is also proposed, comprising:

[0079] The butterfly valve body 30 and the connecting pipes 31 at both ends thereof. Multiple sets of guide shafts 3001 are equidistantly arranged in a circle inside the butterfly valve body 30. The connecting pipes 31 are provided with outwardly protruding straightening parts 32 on their sides. The guide shafts 3001 are adapted to the straightening parts 32.

[0080] The corrector 32 has a V-shaped groove 3201 and a locking groove 3202 formed on it. The V-shaped groove 3201 can guide the guide shaft 3001 to move into the locking groove 3202.

[0081] During use, the guide shaft 3001, V-groove 3201, and locking groove 3202 enable the flange holes on the butterfly valve body 30 and connecting pipe 31 to be quickly aligned, making it more convenient to tighten the two with bolts and reducing the difficulty of installation.

[0082] As an embodiment of the present invention, a connection method is also proposed for the butterfly valve interface structure, including making the butterfly valve body 30 and the connecting pipe 31 coaxial, first aligning the alignment member 32 with the guide shaft 3001, then positioning the guide shaft 3001 within the opening area of ​​the V-groove 3201, and finally moving the butterfly valve body 30 and the connecting pipe 31 closer to each other. Under the guidance of the V-groove 3201, the guide shaft 3001 can move toward the locking groove 3202, and when the guide shaft 3001 enters the locking groove 3202, the butterfly valve body 30 and the connecting pipe 31 are connected by bolts.

[0083] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0084] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sealing test device for a constant-volume push butterfly valve, comprising: A frame (1) is provided on the frame (1), and a rack plate (9) is connected to the drive assembly. Multiple pump pressure assemblies are set on the frame (1) and connected to the same set of delivery pipes (33). Each set of pump pressure assemblies is equipped with a gear (15) that is compatible with the rack plate (9). Its characteristic is that it further includes: A pressure sensing structure is connected to the delivery pipe (33), and the pressure sensing structure is used to measure the air pressure value inside the delivery pipe (33); The elastic retaining component is slidably connected to the hysteresis groove (1901) provided on the pressure sensing structure. When the pressure sensing structure measures that the pressure value in the delivery pipe (33) reaches a preset value, the elastic retaining component can actively move relative to the hysteresis groove (1901). A traction structure connects the rack plate (9) and the elastic retaining component. When the elastic retaining component moves actively relative to the hysteresis groove (1901), the traction structure can drive the rack plate (9) to separate from one or more sets of gears (15). The pressure sensing structure includes a hysteresis cylinder (16) disposed on the drive assembly. The hysteresis cylinder (16) is connected to the delivery pipe (33), and a second sealing plug (17) is slidably installed inside the hysteresis cylinder (16). An extension frame (19) that penetrates the hysteresis cylinder (16) is connected to the second sealing plug (17). A first cylindrical spring (18) is sleeved on the extension frame (19). One end of the first cylindrical spring (18) is connected to the second sealing plug (17), and the other end is connected to the interior of the hysteresis cylinder (16). The hysteresis groove (1901) is disposed on the extension frame (19).

2. The constant-volume push butterfly valve sealing test device according to claim 1, characterized in that, The elastic retaining assembly includes multiple sets of grooved wheels (21) that are rolled in the hysteresis groove (1901), the multiple sets of grooved wheels (21) are connected to a horizontally arranged follower rod (20), and the follower rod (20) is connected to the traction structure; The elastic retaining assembly also includes an energy storage structure disposed on the follower rod (20) and a guide plate (26) connected to the drive assembly. The energy storage structure is provided with two sets of embedded shafts (25), which are capable of rolling in guide grooves formed on the guide plate (26).

3. The constant-volume push butterfly valve sealing test device according to claim 2, characterized in that, The energy storage structure includes a slide groove (2001) arranged along the length of the follower rod (20). Two sets of sliders (22) are symmetrically installed in the slide groove (2001). The sliders (22) are rotatably connected to the embedded shaft (25), and the sliders (22) are slidably connected to the horizontal shaft (23) arranged in the slide groove (2001). A second cylindrical spring (24) is sleeved on the horizontal shaft (23), and the two ends of the second cylindrical spring (24) are respectively connected to the two sets of sliders (22).

4. The constant-volume push butterfly valve sealing test device according to claim 2, characterized in that, The guide groove includes two sets of inclined grooves (2601) disposed on the guide plate (26), and the connection of the two sets of inclined grooves (2601) forms an outward protrusion protruding toward the hysteresis groove (1901); When the embedded shaft (25) moves to the protrusion along one of the inclined grooves (2601), the embedded shaft (25) can actively move along the other set of inclined grooves (2601).

5. The constant-volume push butterfly valve sealing test device according to claim 2, characterized in that, The traction structure includes a side slide (28) slidably connected to the drive assembly. One end of the side slide (28) is provided with a traction shaft (29). A lifting component (8) connected to the rack plate (9) is slidably mounted on the traction shaft (29). The traction structure also includes a hysteresis kit disposed between the side slide (28) and the follower rod (20).

6. The constant-volume push butterfly valve sealing test device according to claim 5, characterized in that, The hysteresis kit includes an extension rod (27) connected to the follower rod (20) and a slot (2801) provided on the side slide (28), wherein one end of the extension rod (27) away from the follower rod (20) can move within the slot (2801).

7. The constant-volume push butterfly valve sealing test device according to claim 1, characterized in that, The pump assembly includes a pump cylinder body (10) mounted on the frame (1). A first sealing plug (11) is slidably installed inside the pump cylinder body (10). A connecting shaft (12) passing through the pump cylinder body (10) is connected to the first sealing plug (11). A hinge rod (13) is rotatably mounted on the connecting shaft (12). A connecting ring (14) is coaxially mounted on the gear (15), and the hinge rod (13) is rotatably connected to the connecting ring (14) at an eccentric position.

8. A butterfly valve interface structure, characterized in that, The test is performed using the constant-volume push butterfly valve sealing test equipment as described in any one of claims 1 to 7, including: The butterfly valve body (30) and the connecting pipe (31) provided at both ends thereon, the butterfly valve body (30) is provided with multiple sets of guide shafts (3001) arranged in a circular and equidistant manner, the connecting pipe (31) is provided with a protruding alignment member (32) on the side, and the guide shaft (3001) is adapted to the alignment member (32). The corrector (32) has a V-groove (3201) and a locking groove (3202) formed on it. The V-groove (3201) can guide the guide shaft (3001) to move into the locking groove (3202).

9. A connection method applied to the butterfly valve interface structure of claim 8, characterized in that, This includes making the butterfly valve body (30) and the connecting pipe (31) coaxial, first aligning the alignment component (32) with the guide shaft (3001), then positioning the guide shaft (3001) within the opening area of ​​the V-groove (3201), and finally moving the butterfly valve body (30) and the connecting pipe (31) closer to each other. Under the guidance of the V-groove (3201), the guide shaft (3001) can move toward the locking groove (3202), and when the guide shaft (3001) enters the locking groove (3202), the butterfly valve body (30) and the connecting pipe (31) are connected by bolts.

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