Pressure testing device of pressure balance check valve for deep sea
By using worm gear transmission and multiple clamping claws, the problem of uneven force on the check valve during high-pressure testing is solved, achieving stable clamping of the check valve and accurate detection of its sealing performance, thus improving the reliability and efficiency of the test.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-04-03
AI Technical Summary
The clamping mechanism of the existing pressure testing device uses a single-axis drive, which causes the check valve to be subjected to uneven force during high-pressure testing, and cannot accurately reflect its sealing performance.
The design employs a worm gear drive and multiple sets of clamping claws. The motor drives the worm to make the clamping claws swing around the fulcrum of the fixed shell to clamp the check valve. Combined with the electric push rod and gear meshing of the push assembly, the symmetrical movement of the sealing shell is achieved, forming a uniform and stable test space. The seal is formed with the rubber sealing ring through the snap-fit assembly.
Ensure the check valve is fixed in position during testing to avoid affecting the accuracy of pressure test data due to workpiece movement, thereby improving the reliability and testing efficiency of the device and achieving accurate testing of sealing performance.
Smart Images
Figure CN121783469A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of marine engineering equipment testing technology, specifically to a pressure testing device for a pressure-balanced check valve used in deep sea applications. Background Technology
[0002] In the field of marine engineering technology, the reliability of deep-sea equipment is directly related to the safe operation of deep-sea exploration, resource development and other operations. As a key component of the deep-sea fluid control system, the pressure balance check valve needs to prevent backflow of the medium under high pressure environment, and the testing of its sealing performance and pressure resistance is particularly important.
[0003] Existing pressure testing devices mainly use a rigid clamping method driven by a single axis. The check valve is fixed by unidirectional cylinder thrust or manual bolt tightening. The clamping components of this structure are mostly single-sided fixed claws, which can only apply clamping force from one direction. Moreover, there is a lack of force balance adjustment mechanism in the transmission path. In actual testing, additional positioning blocks are needed to assist in limiting the position to compensate for the lack of stability of unidirectional clamping.
[0004] However, the inventors of this application discovered in the process of implementing the technical solution that the above-mentioned clamping structure has at least the following technical problems: Since the clamping force driven in one direction cannot form a symmetrical force balance, the check valve is prone to slight displacement due to uneven force during high pressure testing, which makes it impossible to accurately reflect the actual sealing performance of the check valve. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides a pressure testing device for a pressure-balanced check valve used in deep-sea applications. This device solves the problem in existing technologies where the clamping force driven in one direction cannot form a symmetrical force balance, causing the check valve to easily deviate slightly during high-pressure testing due to uneven force distribution.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressure testing device for a deep-sea pressure-balanced check valve, comprising a base plate, on both sides of the base plate being provided with air pressure conveyors, a control panel being fixedly connected to the outside of the air pressure conveyors, bases being fixedly connected to both sides of the upper surface of the base plate, a first sealing shell and a second sealing shell being slidably connected to the upper surface of the bases, a workbench being fixedly connected to the upper surface of the middle part of the base plate, a clamping assembly being fixedly connected inside the workbench, detectors being fixedly connected inside the first and second sealing shells, a pushing assembly being fixedly connected inside the bases, an air supply pipe being fixedly connected inside the air pressure conveyors, the outside of the air supply pipe penetrating the inside of the second sealing shell, and a snap-fit assembly being fixedly connected to the outside of one side of the air supply pipe.
[0007] By adopting the above technical solution, the worm gear drives the first gear to rotate through tooth end meshing, causing the clamping claws distributed around the fixed shell to synchronously retract towards the center, achieving uniform clamping of the check valve. The self-locking characteristic of the worm gear maintains the continuity of the clamping force, while the symmetrical arrangement of the first gear and multiple sets of clamping claws ensures that the check valve receives a balanced clamping force in the circumferential direction, avoiding the force deviation caused by traditional unidirectional clamping. When the check valve is clamped, the multiple sets of clamping claws form constraints from different directions, offsetting the lateral force generated by the medium pressure during high-pressure testing, preventing slight displacement of the workpiece, thereby ensuring the stability of the pressure distribution in the test chamber, enabling the detector to accurately collect the sealing performance data of the check valve.
[0008] Preferably, the pushing assembly includes an electric push rod, which is externally fixedly connected to the inside of the base. The output end of the electric push rod is connected to a rack, the top end of which is fixedly connected to the lower outside of the sealing shell, and the tooth ends of the rack are meshed with a gear.
[0009] Preferably, a fixing column is fixedly connected inside the gear two, and the lower outer side of the fixing column is rotatably connected to the inside of the base plate. The other tooth end of the gear two is meshed with a rack two, and the top end of the rack two is fixedly connected to the lower outer side of the sealing shell one.
[0010] Preferably, the clamping assembly includes a fixed shell, the outside of which is fixedly connected to the inside of the worktable, a motor is fixedly connected to the inner bottom wall of the fixed shell, a worm gear is connected to the output end of the motor, a worm wheel is meshed with the tooth end of the worm gear, a gear is meshed with the tooth end of the worm wheel, and a clamping claw is fixedly connected to the outside of the gear.
[0011] Preferably, the middle parts of the worm gear and gear one are rotatably connected to the inside of both sides of the fixed shell, and the outside of the clamping claw is rotatably connected to the inside of both sides of the fixed shell.
[0012] Preferably, the buckle assembly includes a fixing ring, one side of which is fixedly connected to the outside of one side of the air supply pipe, and the other side of which is fixedly connected to a sealing ring. A rotating column is rotatably connected inside the fixing ring, and a rotating plate is fixedly connected to the outside of the rotating column.
[0013] Preferably, a spring is provided on the outside of the rotating plate, the other end of the spring is provided on the outside of the fixed ring, a fixed plate is fixedly connected to one side of the rotating plate, and a stop bar is fixedly connected to the other side of the rotating plate.
[0014] Preferably, the outside of the stop bar is disposed outside the clamping claw.
[0015] Preferably, the sealing ring is made of rubber.
[0016] Preferably, the method of using a pressure testing device for a deep-sea pressure-balanced check valve includes the following steps: S1. Place the check valve on the workbench, start the clamping assembly through the control panel to clamp the check valve with the clamping jaws, and install the air supply pipe and buckle assembly at the inlet and outlet of the check valve. S2. Start the push assembly to drive the sealing shell one and sealing shell two to move towards the middle to form a sealing space; S3. High-pressure gas is delivered to the sealed space via a pneumatic conveyor and a gas delivery pipe. S4. The detector monitors pressure data in real time and transmits it to the control panel. S5. After the test is completed, release the gas, push the component to reset the sealing shell, and clamp the component to release the check valve.
[0017] This invention provides a pressure testing device for a pressure-balanced check valve used in deep-sea applications. It offers the following advantages: 1. This invention uses a motor to drive a worm gear to drive a worm wheel, causing the clamping jaws to swing around the fixed housing fulcrum to clamp the check valve. This ensures that the check valve is in a fixed position during testing, avoiding the impact of workpiece shaking on the accuracy of pressure test data and improving the reliability of the device.
[0018] 2. This invention drives rack one to move by pushing the electric push rod of the component, and then drives rack two to move in the opposite direction through the meshing transmission of gear two, so as to realize the synchronous and symmetrical movement of sealing shell one and sealing shell two, forming a uniform and stable sealed test space above the workbench, avoiding uneven force caused by unidirectional drive, ensuring the sealing and stability of the test environment, and providing reliable conditions for high-pressure testing.
[0019] 3. The buckle assembly of the present invention uses a rotating plate to rotate around a rotating column to clamp the stop rod to the check valve interface, forming a seal with the rubber sealing ring. The spring provides continuous clamping force, and when the clamping claw is released, it can push the stop rod to drive the rotating plate to release the clamping, which simplifies the operation process and improves the testing efficiency.
[0020] 4. This invention monitors the pressure data in the sealed space in real time through a detector and transmits it to the control panel, realizing real-time acquisition and dynamic display of pressure data, which facilitates operators to accurately control the output pressure of the pneumatic conveyor. Attached Figure Description
[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial structural diagram of the worktable of the present invention; Figure 3 This is a partial structural diagram of the driving component of the present invention; Figure 4 This is a partial structural diagram of the clamping assembly of the present invention; Figure 5 This is a schematic diagram of a partial structure of the worm gear of the present invention; Figure 6 This is a partial structural diagram of the snap-fit assembly of the present invention; Figure 7 This is a partial structural diagram of the stop bar of the present invention.
[0022] The components are as follows: 1. Base plate; 2. Pneumatic conveyor; 3. Control panel; 4. Base; 5. Sealing shell one; 6. Sealing shell two; 7. Workbench; 8. Clamping assembly; 81. Fixed shell; 82. Motor; 83. Worm gear; 84. Worm wheel; 85. Gear one; 86. Clamping claw; 9. Detector; 10. Pushing assembly; 101. Electric push rod; 102. Gear two; 103. Fixed column; 104. Rack one; 105. Rack two; 11. Air supply pipe; 12. Buckle assembly; 121. Fixed ring; 122. Sealing ring; 123. Rotating column; 124. Rotating plate; 125. Spring; 126. Fixed plate; 127. Stop bar. Detailed Implementation
[0023] The technical solution of the present invention will now be clearly and completely described 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.
[0024] Please see the appendix Figure 1 - Appendix Figure 3 This invention provides a pressure testing device for a deep-sea pressure-balanced check valve, comprising a base plate 1, with air pressure conveyors 2 installed on both sides of the base plate 1, and a control panel 3 fixedly connected to the outside of the air pressure conveyors 2. Bases 4 are fixedly connected to both sides of the upper surface of the base plate 1, and sealing shell 1 5 and sealing shell 2 6 are slidably connected to the upper surface of the base 4. A workbench 7 is fixedly connected to the upper surface of the middle part of the base plate 1, and a clamping assembly 8 is fixedly connected inside the workbench 7. Detectors 9 are fixedly connected inside both sealing shell 1 5 and sealing shell 2 6. A pushing assembly 10 is fixedly connected inside the base 4. An air supply pipe 11 is fixedly connected inside the air pressure conveyors 2, and the outside of the air supply pipe 11 penetrates the inside of the sealing shell 2 6. A snap-fit assembly 12 is fixedly connected to one side of the air supply pipe 11.
[0025] Specifically, first, the check valve is placed on the upper surface of the workbench 7. Then, the motor 82 in the clamping assembly 8 drives the worm gear 83 to rotate, which in turn drives the gear 85 to rotate via the worm wheel 84, causing the clamping jaws 86 to clamp the check valve and ensure its fixed position during testing. Next, the air supply pipe 11 and the snap-fit assembly 12 are installed at the inlet and outlet ends of the check valve, respectively. The rotating plate 124 is mounted on the fixed ring 121 via the rotating column 123, and the spring 125 provides the restoring force. When the air supply pipe 11 is connected to the check valve interface, the stop bar 127 on the rotating plate 124 locks the edge of the interface, and a sealed connection is achieved with the rubber sealing ring 122. Then, the pushing assembly 10 is activated. When the electric push rod 101 is in operation, the output end of the electric push rod 101 drives the rack 104 to move horizontally. During the sliding process, the rack 104 drives the gear 2 102 to rotate. The gear 2 102 rotates around the fixed column 103, and then drives the rack 2 105 to move in the opposite direction through the tooth end on the other side. Finally, it drives the sealing shell 1 5 and the sealing shell 2 6 to slide synchronously towards the middle, forming a sealed test space above the workbench 7. High-pressure gas is then delivered into the sealed space through the air pressure conveyor 2 and the air supply pipe 11. The detector 9 monitors the pressure data in real time and transmits it to the control panel 3, thereby completing the sealing performance test of the check valve under high pressure.
[0026] Please see the appendix Figure 3 The pushing assembly 10 includes an electric push rod 101, which is externally fixedly connected to the inside of the base 4. The output end of the electric push rod 101 is connected to a rack 104, the top end of which is fixedly connected to the lower outside of the sealing shell 6. The tooth end of the rack 104 is meshed with a gear 102. The gear 102 is internally fixedly connected to a fixing column 103, the lower outside of which is rotatably connected to the inside of the base plate 1. The other tooth end of the gear 102 is meshed with a rack 105, the top end of which is fixedly connected to the lower outside of the sealing shell 5.
[0027] Specifically, after the electric push rod 101 is started, its output end drives the rack 104 to move horizontally. Since the rack 104 meshes with the gear 102, the gear 102 rotates around the fixed column 103, and drives the rack 105 to move in the opposite direction through the other tooth end. This causes the sealing shell 5 and the sealing shell 6 to slide synchronously towards the middle, forming a sealed test space above the workbench 7. The fixed column 103 provides rotational support for the gear 102, ensuring stable transmission. The meshing of the rack 104 and the gear 102 drives the rack 105 to slide, realizing the synchronous and symmetrical movement of the sealing shell 5 and the sealing shell 6. The sealing shell 5 and the sealing shell 6 will slide on the upper surface of the base 4, ensuring the uniformity and stability when the sealed space is formed, and avoiding the problem of uneven force caused by unidirectional drive.
[0028] Please see the appendix Figure 4 and attached Figure 5 The clamping assembly 8 includes a fixed housing 81, which is externally fixedly connected to the inside of the worktable 7. A motor 82 is fixedly connected to the inner bottom wall of the fixed housing 81. A worm gear 83 is connected to the output end of the motor 82. A worm wheel 84 is meshed with the tooth end of the worm gear 83. A gear 85 is meshed with the tooth end of the worm wheel 84. A clamping claw 86 is fixedly connected to the outside of the gear 85. The middle parts of the worm wheel 84 and the gear 85 are rotatably connected to the inside of both sides of the fixed housing 81. The outside of the clamping claw 86 is rotatably connected to the inside of both sides of the fixed housing 81.
[0029] Specifically, after the motor 82 starts, it drives the worm 83 to rotate. The worm 83 meshes with the worm wheel 84 through its toothed end, causing the worm wheel 84 to rotate. In turn, the worm wheel 84 drives the gear 85 to rotate. The clamping claw 86 fixed outside the gear 85 rotates with the gear 85 and swings around the rotation fulcrum of the fixed shell 81, thereby clamping or releasing the check valve.
[0030] Please see the appendix Figure 6 and attached Figure 7 The buckle assembly 12 includes a retaining ring 121. One side of the retaining ring 121 is fixedly connected to the outside of one side of the air supply pipe 11, and the other side of the retaining ring 121 is fixedly connected to a sealing ring 122. A rotating column 123 is rotatably connected inside the retaining ring 121, and a rotating plate 124 is fixedly connected to the outside of the rotating column 123. A spring 125 is provided on the outside of the rotating plate 124, and the other end of the spring 125 is located outside the retaining ring 121. A retaining plate 126 is fixedly connected to the outside of one side of the rotating plate 124, and a stop bar 127 is fixedly connected to the outside of the other side of the rotating plate 124. The stop bar 127 is located outside the clamping claw 86. The sealing ring 122 is made of rubber.
[0031] Specifically, the retaining ring 121 is fixed to the port of the air supply pipe 11. When the air supply pipe 11 is connected to the check valve interface, the rotating plate 124 rotates around the rotating column 123. At this time, the spring 125 is compressed by the rotating plate 124 and undergoes elastic deformation. Through the restoring force, the rotating plate 124 is pushed to maintain the clamped state. At the same time, the fixing plate 126 presses against the interface surface, and together with the rubber sealing ring 122, a seal is formed at the interface. After the test is completed, due to the external contact between the stop rod 127 and the clamping claw 86, when the clamping claw 86 releases the check valve, it will push the stop rod 127. The stop rod 127 will drive the rotating plate 124 and the fixing plate 126 to rotate, causing the rotating plate 124 and the fixing plate 126 to disengage from the check valve interface.
[0032] A method for using a pressure testing device for a pressure-balanced check valve used in deep sea applications includes the following steps: S1. Place the check valve on the workbench 7, start the clamping assembly 8 through the control panel 3, so that the clamping claw 86 clamps the check valve, and install the air supply pipe 11 and the snap-fit assembly 12 at the inlet and outlet of the check valve. S2. Start the push assembly 10 to drive the sealing shell 5 and the sealing shell 6 to move towards the middle to form a sealing space; S3. High-pressure gas is delivered to the sealed space via the air delivery pipe 11 through the air pressure conveyor 2. S4, Detector 9 monitors pressure data in real time and transmits it to control panel 3; S5. After the test is completed, release the gas, push component 10 to reset the sealing shell, and clamp component 8 to release the check valve.
[0033] Specifically, S1, after placing the check valve on the workbench 7, start the clamping assembly 8 through the control panel 3. The motor 82 drives the worm gear 83 to rotate, which is then reduced and transmitted to the gear 85 through the worm wheel 84. This causes the clamping claw 86 to swing around the fulcrum of the fixed shell 81 and clamp the check valve. Then, install the snap-fit assembly 12 at the port of the air supply pipe 11 at both ends of the water stop valve. The rotating plate 124 rotates around the rotating column 123, causing the stop rod 127 to clamp the check valve interface. The spring 125 provides continuous clamping force, which, together with the rubber sealing ring 122, achieves interface sealing.
[0034] S2. After starting the push assembly 10, the electric push rod 101 pushes the rack 104 to move horizontally. Through the meshing transmission of the gear 2 102, the rack 2 105 moves in the opposite direction, causing the sealing shell 1 5 and the sealing shell 2 6 to slide synchronously towards the middle, forming a closed sealed test chamber above the worktable 7.
[0035] S3. The air pressure conveyor 2 delivers high-pressure gas into the sealed space through the air supply pipe 11. The gas pressure is controlled by the control panel 3. The air supply pipe 11 and the check valve interface are kept sealed by the snap-fit assembly 12 to prevent gas leakage.
[0036] S4, the detectors 9 inside the sealing shell 1 5 and sealing shell 2 6 collect pressure data in real time and transmit it to the control panel 3 via electrical signals. The control panel 3 processes and displays the data.
[0037] S5. After the test is completed, the control panel 3 controls the air pressure conveyor 2 to release pressure, pushing the electric push rod 101 of component 10 to move in the opposite direction, causing the sealing shell 1 5 and sealing shell 2 6 to reset. At the same time, the motor 82 of clamping component 8 reverses, causing the clamping claw 86 to release the check valve. The release of the clamping claw 86 will drive the buckle component 12 to release the buckle, completing the unloading of the workpiece.
[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A pressure testing device for a pressure-balanced check valve used in deep sea applications, comprising a base plate (1), characterized in that, Pneumatic conveyors (2) are provided on both sides of the base plate (1). A control panel (3) is fixedly connected to the outside of the pneumatic conveyor (2). A base (4) is fixedly connected to both sides of the upper surface of the base plate (1). A sealing shell 1 (5) and a sealing shell 2 (6) are slidably connected to the upper surface of the base (4). A workbench (7) is fixedly connected to the upper surface of the middle part of the base plate (1). A clamping assembly (8) is fixedly connected inside the workbench (7). A detector (9) is fixedly connected inside the sealing shell 1 (5) and the sealing shell 2 (6). A pushing assembly (10) is fixedly connected inside the base (4). An air supply pipe (11) is fixedly connected inside the pneumatic conveyor (2). The outside of the air supply pipe (11) penetrates the inside of the sealing shell 2 (6). A buckle assembly (12) is fixedly connected to the outside of one side of the air supply pipe (11).
2. The pressure testing device for a deep-sea pressure-balanced check valve according to claim 1, characterized in that, The pushing assembly (10) includes an electric push rod (101), which is externally fixedly connected to the inside of the base (4). The output end of the electric push rod (101) is connected to a rack (104), the top end of which is fixedly connected to the lower outside of the sealing shell (6). The tooth end of the rack (104) is meshed with a gear (102).
3. The pressure testing device for a deep-sea pressure-balancing check valve according to claim 2, characterized in that, The gear 2 (102) is internally fixedly connected to a fixed column (103), and the lower side of the fixed column (103) is rotatably connected to the inside of the base plate (1). The other side of the gear 2 (102) is meshed with a rack 2 (105), and the top of the rack 2 (105) is fixedly connected to the lower side of the sealing shell 1 (5).
4. The pressure testing device for a deep-sea pressure-balanced check valve according to claim 1, characterized in that, The clamping assembly (8) includes a fixed shell (81), the outside of which is fixedly connected to the inside of the workbench (7). A motor (82) is fixedly connected to the inner bottom wall of the fixed shell (81). A worm (83) is connected to the output end of the motor (82). A worm wheel (84) is meshed with the tooth end of the worm (83). A gear (85) is meshed with the tooth end of the worm wheel (84). A clamping claw (86) is fixedly connected to the outside of the gear (85).
5. The pressure testing device for a deep-sea pressure-balanced check valve according to claim 4, characterized in that, The worm gear (84) and gear 1 (85) are rotatably connected to the inside of both sides of the fixed shell (81), and the outside of the clamping claw (86) is rotatably connected to the inside of both sides of the fixed shell (81).
6. The pressure testing device for a deep-sea pressure-balanced check valve according to claim 4, characterized in that, The buckle assembly (12) includes a fixing ring (121), one side of which is fixedly connected to the outside of the air supply pipe (11), and the other side of which is fixedly connected to a sealing ring (122). The inside of the fixing ring (121) is rotatably connected to a rotating column (123), and the outside of the rotating column (123) is fixedly connected to a rotating plate (124).
7. A pressure testing device for a deep-sea pressure-balanced check valve according to claim 6, characterized in that, A spring (125) is provided on the outside of the rotating plate (124), and the other end of the spring (125) is provided on the outside of the fixed ring (121). A fixed plate (126) is fixedly connected to one side of the rotating plate (124), and a stop bar (127) is fixedly connected to the other side of the rotating plate (124).
8. The pressure testing device for a deep-sea pressure-balanced check valve according to claim 7, characterized in that, The outside of the stop bar (127) is disposed outside the clamping claw (86).
9. A pressure testing device for a deep-sea pressure-balanced check valve according to claim 6, characterized in that, The sealing ring (122) is made of rubber.
10. A method for using a pressure testing device for a pressure-balancing check valve used in deep sea applications, characterized in that... The pressure testing device for a deep-sea pressure-balanced check valve as described in any one of claims 1-9 includes the following steps: S1. Place the check valve on the workbench (7), start the clamping assembly (8) through the control panel (3) to clamp the check valve with the clamping claw (86), and install the air supply pipe (11) and the snap-fit assembly (12) at the inlet and outlet of the check valve. S2. Start the push assembly (10) to drive the sealing shell one (5) and sealing shell two (6) to move towards the middle to form a sealed space; S3. High-pressure gas is delivered to the sealed space through the air delivery pipe (11) via the air pressure conveyor (2); S4, the detector (9) monitors pressure data in real time and transmits it to the control panel (3); S5. After the test is completed, release the gas, push the component (10) to reset the sealing shell, and clamp the component (8) to release the check valve.