Rapid pressure test tool for small pump body

Abstract

The invention discloses a small pump body rapid pressure test tool, and relates to the technical field of fluid machinery testing, the small pump body rapid pressure test tool comprises a large end plate and a small end plate which are arranged on two opposite end faces of a pump body, a large port and a small port are respectively formed on two opposite sides of the pump body, a locking piece is arranged between the large end plate and the small end plate, and the locking piece is connected with the large end plate and the small end plate. One end of the locking piece pulls the large end plate to block the large port, the other end of the locking piece pulls the small end plate to block the small port, a water inlet and a water outlet are formed in the pump body, the water inlet and the water outlet of the pump body are both connected with air supply equipment through pipelines, and the pump body is placed in the water tank. The large end plate and the small end plate can be quickly assembled and disassembled by using one locking piece, and after an air pressure test is adopted, no water is left in the inner cavity of the pump body, and the inner cavity of the pump body does not need to be blow-dried, so that the working efficiency of the pressure test of the small pump body is greatly improved.

Description

Technical Field

[0001] This application relates to the field of fluid machinery testing technology, and in particular to a tooling for rapid pressure testing of a small pump. Background Technology

[0002] Pressure testing of small pump bodies is a core process for verifying the strength and sealing performance of the pump body. Through hydraulic testing, simulating working pressure or even higher pressures, the pump body's pressure-bearing capacity and sealing quality are rigorously tested to ensure no leakage. To improve testing efficiency, specialized testing fixtures are commonly used.

[0003] Currently, the pump body testing fixture consists of two end plates. Two openings are formed on both sides of the pump body, and the two end plates are installed at these openings. Each end plate has 12-14 bolts evenly spaced along its axial direction, securing it to the pump body. After the two end plates are fixed, water is filled into the pump chamber to completely purge air. The pressure is then slowly increased to the specified test pressure and maintained for the specified time. The pressure gauge reading is observed to ensure stability, and each pump body surface is carefully inspected for leaks or sweating. After the pressure test is passed, the pressure is slowly released, the end plates are removed, and any remaining moisture inside the pump body is dried. Finally, the tested pump body is assembled.

[0004] When installing and removing the end plate, multiple bolts need to be tightened or loosened one by one, which takes a long time. At the same time, after the test is completed, the residual moisture inside the pump body needs to be dried, which will reduce the working efficiency of the small pump body pressure test. Summary of the Invention

[0005] To improve the working efficiency of pressure testing of small pumps, this application provides a tooling for rapid pressure testing of small pumps.

[0006] The technical solution for a rapid pressure testing fixture for a small pump body provided in this application is as follows: A rapid pressure testing fixture for a small pump body includes a large end plate and a small end plate disposed on opposite end faces of the pump body. Large ports and small ports are formed on opposite sides of the pump body, and a locking member is disposed between the large end plate and the small end plate. One end of the locking member pulls the large end plate to seal the large port, and the other end of the locking member pulls the small end plate to seal the small port. An inlet and an outlet are formed on the pump body. Both the inlet and outlet of the pump body are connected to an air supply device through pipelines, and the pump body is placed in a water tank.

[0007] By adopting the above technical solution, when pressure testing the pump body, the large end plate and small end plate are first placed at the large and small ports of the pump body, respectively. Then, locking devices are used to connect and lock the large and small end plates, so that the large end plate seals the large port and the small end plate seals the small port. The air supply equipment is first connected to the inlet and outlet of the pump body, and then the pump body is placed in the water tank. The air supply equipment injects high-pressure gas into the pump body cavity. The presence of bubbles on the pump body surface is used to determine whether the pump body is leaking. With this setup, the large and small end plates can be quickly installed and removed using a single locking device. After the air pressure test, no moisture remains in the pump body cavity, eliminating the need to dry the pump body cavity, thus greatly improving the efficiency of pressure testing small pump bodies.

[0008] Preferably, a limiting annular groove is formed on the side wall of the large end plate near the pump body, the end face of the large port of the pump body is located in the limiting annular groove, a limiting inner ring is formed on the end face of the small port of the pump body, and a limiting outer ring is formed on the side wall of the small end plate near the pump body, with the inner peripheral wall of the limiting outer ring abutting against the outer peripheral wall of the limiting inner ring.

[0009] By adopting the above technical solution, when installing the large end plate and the small end plate, the limiting ring groove of the large end plate matches the end face at the large port of the pump body, and the limiting outer ring of the small end plate matches the limiting inner ring of the pump body, thereby facilitating the quick alignment of the large end plate and the small end plate.

[0010] Preferably, a first sealing element is embedded on the side wall of the limiting ring groove of the large end plate, and the first sealing element abuts against the pump body; a second sealing element is embedded on the side wall of the limiting outer ring near the pump body, and the second sealing element abuts against the pump body.

[0011] By adopting the above technical solution, after the large end plate and the small end plate are connected and locked with locking components, the first sealing component seals the gap between the large end plate and the pump body, and the second sealing component seals the gap between the small end plate and the pump body, thereby making the sealing effect of the pressure testing fixture better.

[0012] Preferably, the locking component includes an end head, a first locking rod, and a first locking sleeve. The first locking sleeve is fixedly disposed in the middle of the side wall of the large end plate near the small end plate. The first locking rod is threaded inside the first locking sleeve. The end of the first locking rod away from the first locking sleeve passes through the small end plate. The end head is fixedly disposed at the end of the first locking rod away from the first locking sleeve. A first internal hexagonal groove is formed on the side wall of the end head away from the first locking rod. The end head abuts against the side wall of the small end plate away from the large end plate.

[0013] By adopting the above technical solution, when locking the large end plate and the small end plate, the first locking rod is first inserted into the small end plate and the end of the first locking rod enters the first locking sleeve. Then, a wrench is used to drive the end head to rotate through the first internal hexagonal groove. The end head drives the first locking rod to rotate and enters the first locking sleeve, thereby fixing the large end plate and the small end plate to the pump body.

[0014] Preferably, a third sealing element is embedded on the side wall of the small end plate away from the large end plate, and the third sealing element abuts against the end.

[0015] By adopting the above technical solution, after locking the large end plate and the small end plate with the locking component, the end is pressed against the third sealing component. The third sealing component seals the gap between the small end plate and the first locking rod, thereby making the sealing effect of the pressure testing fixture better.

[0016] Preferably, the locking component includes a second locking rod and a second locking sleeve. The second locking rod is fixedly disposed on the side wall of the small end plate near the large end plate, and the second locking sleeve is fixedly disposed on the side wall of the large end plate near the small end plate. The second locking rod is threaded into the second locking sleeve. A second internal hexagonal groove is provided on the side walls of the large end plate and the small end plate that are far apart from each other.

[0017] By adopting the above technical solution, when locking the large end plate and the small end plate, first insert the end of the second locking rod into the second locking sleeve, and then use a wrench to drive the large end plate and the small end plate to rotate in opposite directions through the second internal hexagonal groove. The second locking rod rotates into the second locking sleeve, thereby fixing the large end plate and the small end plate to the pump body.

[0018] Preferably, both the first and second sealing elements have deformation annular cavities, the large end plate has a first clamping assembly, and the small end plate has a second clamping assembly. When the internal air pressure of the pump body increases, the first clamping assembly clamps the first sealing element, causing deformation and improving the sealing effect of the first sealing element; the second clamping assembly clamps the second sealing element, causing deformation and improving the sealing effect of the second sealing element.

[0019] By adopting the above technical solution, when a leak occurs at the large or small end plate of the pump body, it is difficult to determine whether the leak is due to the seal at the large or small end plate or the pump body itself. At this time, the air pressure inside the pump body is gradually increased. The first clamping assembly and the second clamping assembly clamp the first and second seals. The first and second seals deform under the action of the deformation ring cavity, thereby improving the sealing effect of the first and second seals. Then, the density of the bubbles at the leak point is observed. If the bubbles gradually become less dense, the leak is due to the seal at the large or small end plate. If the bubbles gradually become dense, the leak is due to the pump body itself.

[0020] Preferably, the first clamping assembly includes a first piston ring, a first clamping ring, a second clamping ring, a plurality of first push blocks, second push blocks, third push blocks, and a first elastic element. The first piston ring is slidably disposed on the side wall of the large end plate near the small end plate. The plurality of second push blocks and third push blocks are fixedly disposed on the side wall of the first piston ring near the first seal. The second push blocks are located outside the third push blocks. The first clamping ring and the second clamping ring are located on both sides of the first seal along the radial direction of the large end plate. The first clamping ring is fixedly connected to the side of the second push block away from the first piston ring. The first push blocks are slidably disposed in the large end plate along the radial direction of the large end plate. The plurality of first push blocks are equally spaced along the circumference of the large end plate. The two ends of the first push blocks respectively abut against the third push block and the second clamping ring. The plurality of first elastic elements are disposed in the large end plate and abut against the ends of the plurality of first push blocks near the second clamping ring.

[0021] By adopting the above technical solution, during conventional air pressure testing, multiple first elastic elements act on the first piston ring through the first push block and the third push block, preventing the first piston ring from moving. When the air pressure in the pump body cavity increases, the thrust of the air pressure on the first piston ring gradually exceeds the elastic force of the first elastic elements. At this time, the first piston ring slides towards the large end plate. The first piston ring drives the second push block and the third push block to move. The second push block drives the first clamping ring to move. The third push block drives the second clamping ring to move through multiple first push blocks, so that the first clamping ring and the second clamping ring clamp the first seal, thereby improving the sealing effect of the first seal.

[0022] Preferably, the second clamping assembly includes a second piston ring, a first push ring, a second push ring, a plurality of fourth push blocks, push rods, a second elastic element, a first clamping plate, and a second clamping plate. The second piston ring is slidably disposed on the side wall of the small end plate near the large end plate. The fourth push blocks are fixedly disposed on the side wall of the second piston ring away from the large end plate. The push rods are slidably disposed within the small end plate along the radial direction. The plurality of push rods are equally spaced along the circumference of the small end plate, and one end of each push rod abuts against a fourth push block. The plurality of second elastic elements are disposed within the small end plate and abut against the other ends of the push rods respectively. The first push ring and the second push ring are both slidably disposed within the small end plate. The first push ring is located outside the second push ring, and one end of each push ring is inserted into the plurality of push rods. The first clamping plate and the second clamping plate are slidably disposed on both sides of the second seal along the radial direction of the small end plate. The plurality of first clamping plates are located on the outer periphery of the second seal and abut against the other end of the first push ring. The plurality of second clamping plates are located on the inner periphery of the second seal and abut against the other end of the second push ring.

[0023] By adopting the above technical solution, during conventional air pressure testing, multiple second elastic elements act on the second piston ring through push rods and the first push ring, preventing the second piston ring from moving. When the air pressure in the pump body cavity increases, the thrust of the air pressure on the second piston ring gradually exceeds the elastic force of the second elastic elements. At this time, the second piston ring slides towards the small end plate, and the second piston ring drives multiple fourth push blocks to move. The fourth push blocks drive the first push ring and the second push ring to move through multiple push rods. The first push ring and the second push ring drive multiple first clamping plates and the second clamping plates to move towards the second seal, so that the multiple first clamping plates and the multiple second clamping plates clamp the second seal, thereby improving the sealing effect of the second seal.

[0024] Preferably, both the first and second sealing elements are sealing airbags. A first vent pipe is provided inside the large end plate, with one end of the first vent pipe communicating with the inner cavity of the pump body and the other end communicating with the first sealing element. A second vent pipe is provided inside the small end plate, with one end of the second vent pipe communicating with the inner cavity of the pump body and the other end communicating with the second sealing element.

[0025] By adopting the above technical solution, when the conventional air pressure is tested, the gas in the pump body enters the first and second sealing elements through the first and second vent pipes. The first and second sealing elements expand and seal. When the air pressure in the pump body cavity increases, the first and second sealing elements expand further, improving the sealing effect of the first and second sealing elements. This makes it easier to determine whether the leakage is at the seal of the large end plate or the small end plate, or whether the leakage is in the pump body itself.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The large and small end plates can be quickly installed and removed using a single locking component. After the air pressure test is completed, no moisture remains in the pump body cavity, eliminating the need to dry the pump body cavity, thus greatly improving the working efficiency of pressure testing of small pump bodies. 2. When installing the large end plate and the small end plate, the limiting ring groove of the large end plate mates with the end face at the large port of the pump body, and the limiting outer ring of the small end plate mates with the limiting inner ring of the pump body. This facilitates quick alignment of the large end plate and the small end plate. After the large end plate and the small end plate are connected and locked using locking components, the first sealing component seals the gap between the large end plate and the pump body, and the second sealing component seals the gap between the small end plate and the pump body, thereby improving the sealing effect of the pressure testing fixture. 3. When leakage occurs at the large or small end plate of the pump body via the first and second clamping assemblies, it is difficult to determine whether the leakage is due to the seal at the large or small end plate or the leakage itself. In this case, the air pressure inside the pump body is gradually increased. The first and second clamping assemblies clamp the first and second seals. The first and second seals deform under the action of the deformation ring cavity, thereby improving the sealing effect of the first and second seals. Then, the density of the bubbles at the leakage point is observed. If the bubbles gradually become less dense, the leakage is due to the seal at the large or small end plate. If the bubbles gradually become dense, the leakage is due to the pump body itself. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the small pump body rapid pressure testing fixture in Embodiment 1 of this application; Figure 2 This is a cross-sectional view of the overall structure of the small pump body rapid pressure testing fixture in Embodiment 1 of this application; Figure 3 This is a cross-sectional view of the overall structure of the small pump body rapid pressure testing fixture in Embodiment 2 of this application; Figure 4 This is a cross-sectional view of the overall structure of the small pump body rapid pressure testing fixture in Embodiment 3 of this application; Figure 5 For this application Figure 4 Enlarged view of point A in the middle; Figure 6 For this application Figure 4 Enlarged view of point B in the middle; Figure 7 This is a partial front view of the structure of the rapid pressure testing fixture for a small pump body in Embodiment 3 of this application; Figure 8 This is a reverse schematic diagram of a portion of the structure of the rapid pressure testing fixture for a small pump body in Embodiment 3 of this application.

[0028] Reference numerals: 1. Pump body; 2. Large end plate; 3. Small end plate; 4. Large port; 5. Small port; 6. Locking element; 601. End head; 602. First locking rod; 603. First locking sleeve; 604. Second locking rod; 605. Second locking sleeve; 7. Inlet; 8. Outlet; 9. Limiting ring groove; 10. Limiting inner ring; 11. Limiting outer ring; 12. First sealing element; 13. Second sealing element; 14. Third sealing element; 15. First internal hexagonal groove; 16. Second internal hexagonal groove; 17. Deformation ring cavity; 18. 181. First clamping assembly; 182. First piston ring; 183. Second push block; 184. Third push block; 185. First clamping ring; 186. First push block; 187. First elastic element; 19. Second clamping assembly; 191. Second piston ring; 192. Fourth push block; 193. First push ring; 194. Second push ring; 195. Push rod; 196. Second elastic element; 197. First clamping plate; 198. Second clamping plate; 20. First vent pipe; 21. Second vent pipe; 22. Wedge groove. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0030] This application discloses a tooling for rapid pressure testing of a small pump body.

[0031] Example 1: Reference Figure 1 and Figure 2 A rapid pressure testing fixture for a small pump body includes a large end plate 2 and a small end plate 3 installed on both sides of a pump body 1. A circular large port 4 and a small port 5 are formed on both sides of the pump body 1, respectively. Both the large end plate 2 and the small end plate 3 are circular and are installed on the large port 4 and the small port 5, respectively. An inlet 7 and an outlet 8 are formed on the top of the pump body 1. Both the inlet 7 and the outlet 8 of the pump body 1 are connected to an air supply device via pipelines, and the pump body 1 is placed inside a water tank.

[0032] A limiting annular groove 9 is formed on the outer periphery of the large end plate 2 near the side wall of the pump body 1, and one end of the pump body 1 located at the large port 4 is located in the limiting annular groove 9. When the large end plate 2 is installed at the large port 4 of the pump body 1, the limiting annular groove 9 is used to quickly position the large end plate 2, thereby improving the installation accuracy of the large end plate 2.

[0033] The pump body 1 has an integrally formed inner limiting ring 10 on the outer periphery of the small port 5, and the small end plate 3 has an integrally formed outer limiting ring 11 on the side wall near the pump body 1. When the small end plate 3 is installed at the small port 5 of the pump body 1, the outer limiting ring 11 is appropriately matched and set outside the inner limiting ring 10, which improves the installation accuracy of the small end plate 3.

[0034] A locking element 6 is installed between the large end plate 2 and the small end plate 3, which can fix the large end plate 2 and the small end plate 3 to the pump body 1. The locking element 6 includes an end head 601, a first locking rod 602, and a first locking sleeve 603. The first locking sleeve 603 is fixedly installed in the middle of the side wall of the large end plate 2 near the small end plate 3, and the first locking rod 602 slides through the middle of the small end plate 3. One end of the first locking rod 602 is threaded into a first screw sleeve, and the end head 601 is fixedly installed at the end of the first locking rod 602 away from the first locking sleeve 603. A first internal hexagonal groove 15 is formed on the side wall of the end head 601 away from the first locking rod 602, and the end head 601 abuts against the side wall of the small end plate 3 away from the large end plate 2.

[0035] When locking the large end plate 2 and the small end plate 3, firstly, insert the first locking rod 602 into the small end plate 3, so that the end of the first locking rod 602 is initially inserted into the first locking sleeve 603. Then, use a wrench to wrench into the first internal hexagonal groove 15 on the end head 601, rotate the end head 601 to drive the first locking rod 602 to rotate, so that the first locking rod 602 is gradually screwed into the first locking sleeve 603, thereby achieving reliable fixation of the large end plate 2 and the small end plate 3 to the pump body 1.

[0036] A first sealing element 12 is fixedly embedded in the side wall of the large end plate 2 located in the limiting ring groove 9, and the first sealing element 12 abuts against the large end plate 2 and the pump body 1. A second sealing element 13 is fixedly embedded in the side wall of the limiting outer ring 11 near the pump body 1, and the second sealing element 13 abuts against the limiting outer ring 11 and the pump body 1. A third sealing element 14 is fixedly embedded in the side wall of the small end plate 3 away from the large end plate 2, and the third sealing element 14 abuts against the end head 601, the first locking rod 602, and the small end plate 3. In this application, the first sealing element 12, the second sealing element 13, and the third sealing element 14 can all be rubber sealing rings.

[0037] After the large end plate 2 and the small end plate 3 are connected and locked using the locking element 6, the first sealing element 12 effectively seals the gap between the large end plate 2 and the pump body 1, the second sealing element 13 effectively seals the gap between the small end plate 3 and the pump body 1, and the third sealing element 14 effectively seals the gap between the small end plate 3 and the locking element. Through the synergistic effect of the multi-stage sealing structure, the overall sealing performance of the pressure testing fixture is significantly improved.

[0038] The implementation principle of a rapid pressure testing fixture for a small pump body according to an embodiment of this application is as follows: When performing a pressure test on the pump body 1, the large end plate 2 and the small end plate 3 are first positioned and installed at the large port 4 and small port 5 of the pump body 1, respectively. Then, the large end plate 2 and the small end plate 3 are connected and tightened using a locking component 6, thereby ensuring that the large end plate 2 tightly seals the large port 4 and the small end plate 3 effectively seals the small port 5. Subsequently, the pipeline of the air supply equipment is connected to the water inlet 7 and the water outlet 8 of the pump body 1, and the pump body 1 is completely immersed in the water tank. After starting the air supply equipment, high-pressure gas is injected into the inner cavity of the pump body 1. The operator observes whether continuous bubbles are generated on the surface of the pump body 1 to determine the sealing performance of the pump body 1 and whether there is any leakage. Thus, only one locking component 6 is needed to quickly assemble and disassemble the large end plate 2 and the small end plate 3, significantly simplifying the operation process; by adopting the air pressure test method, there is no liquid residue in the inner cavity of the pump body 1 after the test, eliminating the internal drying process required after the traditional water pressure test, thereby greatly improving the efficiency of pressure testing of the small pump body 1.

[0039] Example 2: Reference Figure 3 The difference between this embodiment and Embodiment 1 is that the locking component 6 includes a second locking rod 604 and a second locking sleeve 605. The second locking rod 604 is fixedly installed in the middle of the side wall of the small end plate 3 near the large end plate 2, and the second locking sleeve 605 is fixedly installed in the middle of the side wall of the large end plate 2 near the small end plate 3. The second locking rod 604 is threaded into the second locking sleeve 605. A second internal hexagonal groove 16 is provided in the middle of the side walls of the large end plate 2 and the small end plate 3 that are far apart from each other.

[0040] When locking the large end plate 2 and the small end plate 3, first align the end of the second locking rod 604 and insert it into the second locking sleeve 605. Then, the operator uses a wrench to engage the second internal hexagonal slot 16, applying torque to cause the large end plate 2 and the small end plate 3 to rotate in opposite directions. This causes the second locking rod 604 to gradually screw into the second locking sleeve 605, thereby firmly fixing the large end plate 2 and the small end plate 3 to the pump body 1.

[0041] Both the first seal 12 and the second seal 13 are annular sealing airbags. A first vent pipe 20 is installed inside the large end plate 2. One end of the first vent pipe 20 communicates with the inner cavity of the pump body 1, and the other end of the first vent pipe 20 is connected to the first seal 12 and communicates with the inner cavity of the first seal 12. A second vent pipe 21 is installed inside the small end plate 3. One end of the second vent pipe 21 communicates with the inner cavity of the pump body 1, and the other end of the second vent pipe 21 is connected to the second seal 13 and communicates with the inner cavity of the second seal 13.

[0042] The implementation principle of Embodiment 2 of this application is as follows: During pressure testing using conventional air pressure, the gas inside the pump body 1 is injected into the first sealing element 12 and the second sealing element 13 through the first vent pipe 20 and the second vent pipe 21, respectively. This causes the first sealing element 12 and the second sealing element 13 to elastically expand under air pressure, thereby achieving a tight fit with the contact surface and forming a preliminary seal. If leakage is observed at the joint between the pump body 1 and the large end plate 2 or the small end plate 3, it is difficult to directly distinguish whether the leakage source is from the end plate seal failure or a defect in the pump body 1 itself. In this case, the air pressure inside the pump body 1 can be gradually increased. As the pressure increases, the first sealing element 12 and the second sealing element 13 further expand under higher air pressure, increasing the clamping force between them and the contact surface, thereby significantly improving the sealing effect at that point.

[0043] Based on this, the source of the leak can be identified by observing the changes in the density of bubbles at the leak location: if the bubbles gradually become sparse, it indicates that the leakage rate has slowed down, meaning that the leak originates from the seal at the large end plate 2 or the small end plate 3, as the sealing effect increases with pressure, leading to a reduction in leakage; if the bubbles gradually become dense, it indicates that the leakage has intensified, suggesting a defect in the pump body 1, which further expands under high pressure, leading to an increase in leakage. This method, by combining controllable pressure increase with dynamic observation, effectively achieves rapid and accurate identification of the leak source, improving the reliability and diagnostic efficiency of the detection process.

[0044] Example 3: Reference Figure 4 , Figure 5 and Figure 6 The difference between this embodiment and Embodiment 2 is that both the first sealing element 12 and the second sealing element 13 are rubber sealing rings, and both the first sealing element 12 and the second sealing element 13 have a deformable annular cavity 17 with a circular cross-section. Under the action of the deformable annular cavity 17, the first sealing element 12 and the second sealing element 13 can deform after being squeezed.

[0045] A first clamping assembly 18 is installed inside the large end plate 2, and a second clamping assembly 19 is installed inside the small end plate 3. When the air pressure inside the water pump cavity increases, the first clamping assembly 18 can clamp the first seal 12, and the second clamping assembly 19 can clamp the second seal 13.

[0046] After being clamped and deformed, the first seal 12 presses against the large end plate 2 and the pump body 1, improving the sealing effect of the first seal 12. After being clamped and deformed, the second seal 13 presses against the small end plate 3 and the pump body 1, improving the sealing effect of the second seal 13.

[0047] Reference Figure 5 , Figure 7 and Figure 8Specifically, the first clamping assembly 18 includes a first piston ring 181, a first clamping ring 184, a second clamping ring 185, twelve first push blocks 186, second push blocks 182, third push blocks 183 and a first elastic element 187. The first piston ring 181 is slidably mounted on the side wall of the large end plate 2 near the small end plate 3 along the axial direction of the large end plate 2.

[0048] Twelve second push blocks 182 and third push blocks 183 are fixedly installed at equal intervals along the circumference of the first piston ring 181 on the side wall of the first piston ring 181 away from the small end plate 3, with the second push blocks 182 located outside the third push blocks 183. A first clamping ring 184 is fixedly installed at the end of the twelve second push blocks 182 away from the first piston ring 181, and the first clamping ring 184 is slidably installed in the large end plate 2 along the axial direction of the large end plate 2 and located on one side of the first seal 12.

[0049] The first push block 186 is slidably installed in the large end plate 2 along the radial direction of the large end plate 2. The twelve first push blocks 186 are arranged at equal intervals along the circumference of the large end plate 2. The twelve first push blocks 186 correspond one-to-one with the twelve third push blocks 183. The ends of the first push blocks 186 and the ends of the third push blocks 183 away from the first piston ring 181 are abutted by wedge-shaped surfaces.

[0050] Twelve first elastic elements 187 are installed at equal intervals along the circumference of the large end plate 2 inside the large end plate 2 and correspond one-to-one with the twelve first push blocks 186. One end of the first elastic element 187 abuts against the inner wall of the large end plate 2, and the other end abuts against the end of the first push block 186 away from the third push block 183. In this application, the first elastic element 187 can be selected as a spring.

[0051] The second clamping ring 185 is slidably installed in the large end plate 2 along the axial direction of the large end plate 2. The second clamping ring 185 is located on the side of the first seal 12 away from the first clamping ring 184, and the ends of the twelve first push blocks 186 and the inner wall of the second clamping ring 185 are all abutted by the wedge-shaped surface.

[0052] During the conventional pneumatic pressure test, multiple first elastic elements 187 apply force to the first piston ring 181 via the first push block 186 and the third push block 183, keeping the first piston ring 181 fixed. As the pneumatic pressure inside the pump body 1 gradually increases, the pneumatic thrust acting on the first piston ring 181 exceeds the elastic force of the first elastic elements 187, and the first piston ring 181 begins to slide inward toward the large end plate 2. This movement drives the second push block 182 and the third push block 183 to move synchronously, which in turn drives the first clamping ring 184 to move, and the third push block 183 pushes the second clamping ring 185 to move via the first push block 186. The first clamping ring 184 and the second clamping ring 185 move toward each other and together clamp the first seal 12, thereby enhancing the sealing performance of the first seal 12.

[0053] Reference Figure 6 , Figure 7 and Figure 8 Specifically, the second clamping assembly 19 includes a second piston ring 191, a first push ring 193, a second push ring 194, twelve fourth push blocks 192, a push rod 195, a second elastic element 196, a first clamping plate 197, and a second clamping plate 198. The second piston ring 191 is slidably mounted on the side wall of the small end plate 3 near the large end plate 2 along the axial direction of the small end plate 3. The twelve fourth push blocks 192 are fixedly mounted on the side wall of the second piston ring 191 away from the large end plate 2 along the circumference of the second piston ring 191 at equal intervals.

[0054] The push rod 195 is slidably installed in the small end plate 3 along the radial direction of the small end plate 3. The twelve push rods 195 are arranged at equal intervals along the circumference of the small end plate 3 and correspond one-to-one with the twelve fourth push blocks 192. The ends of the fourth push blocks 192 away from the second piston ring 191 and the ends of the push rods 195 abut against each other through wedge-shaped surfaces.

[0055] Twelve second elastic elements 196 are installed at equal intervals along the circumference of the small end plate 3 inside the small end plate 3 and correspond one-to-one with the twelve push rods 195. One end of the second elastic element 196 abuts against the inner wall of the small end plate 3, and the other end abuts against the end of the push rod 195 away from the fourth push block 192. In this application, the second elastic element 196 can be selected as a spring.

[0056] Each push rod 195 has two wedge-shaped grooves 22 on its side wall near the large end plate 2. The first push ring 193 and the second push ring 194 are both slidably installed in the small end plate 3 along the axial direction of the small end plate 3. The first push ring 193 is located outside the second push ring 194, and the ends of the first push ring 193 and the second push ring 194 are slidably installed in the wedge-shaped grooves 22 of the push rod 195 through the wedge-shaped surface.

[0057] Both the first clamping plate 197 and the second clamping plate 198 are arc-shaped plates. The first clamping plate 197 is slidably installed inside the small end plate 3 along the radial direction of the small end plate 3 and fits against the outer side of the second sealing element 13. The second clamping plate 198 is slidably installed inside the small end plate 3 along the radial direction of the small end plate 3 and fits against the inner side of the second sealing element 13. The twelve first clamping plates 197 and the twelve second clamping plates 198 are arranged at equal intervals along the circumference of the small end plate 3, and the twelve first clamping plates 197 and the twelve second clamping plates 198 correspond one-to-one. The end of the first push ring 193 away from the push rod 195 and the ends of the twelve first clamping plates 197 abut against each other through wedge-shaped surfaces. The end of the second push ring 194 away from the push rod 195 and the ends of the twelve second clamping plates 198 abut against each other through wedge-shaped surfaces.

[0058] During the conventional pneumatic pressure test, multiple second elastic elements 196 apply force to the second piston ring 191 through push rod 195 and fourth push block 192, keeping the second piston ring 191 fixed. As the pneumatic pressure inside the pump body 1 gradually increases, the pneumatic thrust acting on the second piston ring 191 exceeds the elastic force of the second elastic elements 196, and the second piston ring 191 begins to slide inward into the small end plate 3. This movement drives the fourth push block 192 to move, which in turn drives the push rod 195 to move. The push rod 195 pushes the first push ring 193 and the second push ring 194 to move through two wedge grooves 22. The first push ring 193 drives the twelve first clamping plates 197 to move, and the second push ring 194 drives the twelve second clamping plates 198 to move. The first clamping plates 197 and the second clamping plates 198 move towards each other and clamp the second seal 13 together, thereby enhancing the sealing performance of the second seal 13.

[0059] The implementation principle of Embodiment 3 of this application is as follows: When performing pressure testing using conventional air pressure, the first piston ring 181 and the second piston ring 191 inside the large end plate 2 and the small end plate 3 will not move. If leakage is observed at the joint between the pump body 1 and the large end plate 2 or the small end plate 3, it is difficult to directly distinguish whether the leakage source is from the end plate seal failure or a defect in the pump body 1 itself. At this time, the air pressure inside the pump body 1 can be gradually increased. As the pressure increases, the first seal 12 and the second seal 13 deform under the clamping action of the first clamping assembly 18 and the second clamping assembly 19, and the clamping force between them and the contact surface increases, thereby significantly improving the sealing effect at that point.

[0060] Based on this, the source of the leak can be identified by observing the changes in the density of bubbles at the leak location: if the bubbles gradually become sparse, it indicates that the leakage rate has slowed down, meaning that the leak originates from the seal at the large end plate 2 or the small end plate 3, as the sealing effect increases with pressure, leading to a reduction in leakage; if the bubbles gradually become dense, it indicates that the leakage has intensified, suggesting a defect in the pump body 1, which further expands under high pressure, leading to an increase in leakage. This method, by combining controllable pressure increase with dynamic observation, effectively achieves rapid and accurate identification of the leak source, improving the reliability and diagnostic efficiency of the detection process.

[0061] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A quick pressure testing fixture for a small pump body, characterized in that: The pump body (1) includes a large end plate (2) and a small end plate (3) disposed on opposite end faces of the pump body (1). A large port (4) and a small port (5) are formed on opposite sides of the pump body (1). A locking element (6) is disposed between the large end plate (2) and the small end plate (3). One end of the locking element (6) pulls the large end plate (2) to seal the large port (4), and the other end of the locking element (6) pulls the small end plate (3) to seal the small port (5). The locking element (6) includes an end head (601), a first locking rod (602), and a first locking sleeve (603). The first locking sleeve (603) is fixedly disposed on the middle of the side wall of the large end plate (2) near the small end plate (3). The rod (602) is threaded inside the first locking sleeve (603). The end of the first locking rod (602) away from the first locking sleeve (603) passes through the small end plate (3). The end (601) is fixedly set at the end of the first locking rod (602) away from the first locking sleeve (603). The end (601) is provided with a first internal hexagonal groove (15) on the side wall away from the first locking rod (602). The end (601) abuts against the side wall of the small end plate (3) away from the large end plate (2). The pump body (1) forms an inlet (7) and an outlet (8). The inlet (7) and outlet (8) of the pump body (1) are both connected to the air supply equipment through pipelines, and the pump body (1) is placed in the water tank.

2. The rapid pressure testing fixture for a small pump body according to claim 1, characterized in that: A limiting ring groove (9) is formed on the side wall of the large end plate (2) near the pump body (1). The end face of the large port (4) of the pump body (1) is located in the limiting ring groove (9). A limiting inner ring (10) is formed on the end face of the small port (5) of the pump body (1). A limiting outer ring (11) is formed on the side wall of the small end plate (3) near the pump body (1). The inner peripheral wall of the limiting outer ring (11) abuts against the outer peripheral wall of the limiting inner ring (10).

3. The rapid pressure testing fixture for a small pump body according to claim 2, characterized in that: The large end plate (2) is provided with a first sealing element (12) on the side wall of the limiting ring groove (9), and the first sealing element (12) abuts against the pump body (1). The limiting outer ring (11) is provided with a second sealing element (13) on the side wall near the pump body (1), and the second sealing element (13) abuts against the pump body (1).

4. The rapid pressure testing fixture for a small pump body according to claim 1, characterized in that: A third sealing element (14) is embedded on the side wall of the small end plate (3) away from the large end plate (2), and the third sealing element (14) abuts against the end (601).

5. The rapid pressure testing fixture for a small pump body according to claim 3, characterized in that: The locking component (6) includes a second locking rod (604) and a second locking sleeve (605). The second locking rod (604) is fixedly disposed on the side wall of the small end plate (3) near the large end plate (2). The second locking sleeve (605) is fixedly disposed on the side wall of the large end plate (2) near the small end plate (3). The second locking rod (604) is threaded into the second locking sleeve (605). A second internal hexagonal groove (16) is provided on the side walls of the large end plate (2) and the small end plate (3) that are far apart from each other.

6. The rapid pressure testing fixture for a small pump body according to claim 5, characterized in that: The first sealing element (12) and the second sealing element (13) are both provided with deformation annular cavities (17). The large end plate (2) is provided with a first clamping assembly (18), and the small end plate (3) is provided with a second clamping assembly (19). When the air pressure inside the pump body (1) increases, the first clamping assembly (18) clamps the first sealing element (12) to deform and improve the sealing effect of the first sealing element (12). The second clamping assembly (19) clamps the second sealing element (13) to deform and improve the sealing effect of the second sealing element (13).

7. The rapid pressure testing fixture for a small pump body according to claim 6, characterized in that: The first clamping assembly (18) includes a first piston ring (181), a first clamping ring (184), a second clamping ring (185), a plurality of first push blocks (186), second push blocks (182), third push blocks (183), and a first elastic member (187). The first piston ring (181) is slidably disposed on the side wall of the large end plate (2) near the small end plate (3). The plurality of second push blocks (182) and third push blocks (183) are all fixedly disposed on the side wall of the first piston ring (181) near the first seal member (12). The second push block (182) is located outside the third push block (183). The first clamping ring (184) and the second clamping ring (185) are fixedly disposed on the side wall of the first piston ring (181) near the first seal member (12). The second push block (182) is located outside the third push block (183). The first clamping ring (186) and the second clamping ring (187) are fixedly disposed on the side wall of the large end plate (2) near the small end plate (3). 5) Located on both sides of the first seal (12) along the radial direction of the large end plate (2), the first clamping ring (184) and the second push block (182) are fixedly connected on the side away from the first piston ring (181). The first push block (186) is slidably disposed in the large end plate (2) along the radial direction. Multiple first push blocks (186) are equally spaced along the circumference of the large end plate (2). The two ends of the first push block (186) respectively abut against the third push block (183) and the second clamping ring (185). Multiple first elastic elements (187) are disposed in the large end plate (2) and abut against the ends of multiple first push blocks (186) near the second clamping ring (185).

8. The rapid pressure testing fixture for a small pump body according to claim 6, characterized in that: The second clamping assembly (19) includes a second piston ring (191), a first push ring (193), a second push ring (194), a plurality of fourth push blocks (192), push rods (195), a second elastic element (196), a first clamping plate (197), and a second clamping plate (198). The second piston ring (191) is slidably disposed on the side wall of the small end plate (3) near the large end plate (2). The fourth push blocks (192) are fixedly disposed on the side wall of the second piston ring (191) away from the large end plate (2). The push rods (195) are slidably disposed within the small end plate (3) radially. The plurality of push rods (195) are evenly spaced along the circumference of the small end plate (3). One end of each of the plurality of push rods (195) abuts against the fourth push block (192). The plurality of second elastic elements (196) are also present. 6) Set inside the small end plate (3) and abutting against the other end of multiple push rods (195) respectively. The first push ring (193) and the second push ring (194) are both slidably set inside the small end plate (3). The first push ring (193) is located outside the second push ring (194). One end of the first push ring (193) and the second push ring (194) are both inserted into multiple push rods (195). The first clamping plate (197) and the second clamping plate (198) are slidably set on both sides of the second seal (13) along the radial direction of the small end plate (3). Multiple first clamping plates (197) are located on the outer periphery of the second seal (13) and abut against the other end of the first push ring (193). Multiple second clamping plates (198) are located on the inner periphery of the second seal (13) and abut against the other end of the second push ring (194).

9. A rapid pressure testing fixture for a small pump body according to claim 5, characterized in that: The first sealing element (12) and the second sealing element (13) are both sealing airbags. The large end plate (2) is provided with a first vent pipe (20). One end of the first vent pipe (20) is connected to the inner cavity of the pump body (1), and the other end is connected to the first sealing element (12). The small end plate (3) is provided with a second vent pipe (21). One end of the second vent pipe (21) is connected to the inner cavity of the pump body (1), and the other end is connected to the second sealing element (13).

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