Diaphragm pump high frequency check valve

Abstract

The utility model relates to the field of check valve discloses a diaphragm pump high frequency check valve, including valve body, the valve body inner wall is provided with import cavity and export cavity, one end of valve body is fixedly connected with connecting piece no.

Description

Technical Field

[0001] This utility model relates to the field of check valves, and in particular to a high-frequency check valve for diaphragm pumps. Background Technology

[0002] In industrial fluid transport systems, diaphragm pumps are widely used in many fields such as chemical, pharmaceutical, sewage treatment, and food processing due to their ability to transport special media containing particles, high viscosity, and corrosive substances. As a key component of diaphragm pumps, the check valve's core function is to prevent backflow of fluid when the pump stops running, during stroke switching, or when the pressure difference reverses, thus ensuring the directionality of fluid transport and the stability of system operation.

[0003] In the existing technology, the core working mechanism of check valves used in diaphragm pumps is generally based on the automatic opening and closing of the valve disc under the action of medium pressure difference.

[0004] However, under the high-frequency operation of diaphragm pumps, existing check valves have some shortcomings. Due to the difficulty in effectively buffering energy consumption during the high-frequency opening and closing process of the valve disc, strong rigid impacts are generated between the valve disc and the valve seat. After long-term operation, key components such as the valve seat and valve disc are prone to cracking, deformation and other damage due to repeated severe impacts, which affects the structural stability and service life of the check valve, and thus has an adverse effect on the continuous and stable operation of the diaphragm pump system. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a high-frequency check valve for diaphragm pumps, which aims to improve the problem that the valve disc is difficult to effectively buffer energy consumption during high-frequency opening and closing, and that after long-term operation, key components such as valve seat and valve disc are prone to cracking, deformation and other damage due to repeated severe impacts, affecting the structural stability and service life of the check valve.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-frequency check valve for a diaphragm pump, comprising a valve body, an inlet chamber and an outlet chamber provided on the inner wall of the valve body, a connector one fixedly connected to one end of the valve body, a connector two fixedly connected to the other end of the valve body, a valve disc provided on the inner wall of the valve body, a guide rod fixedly connected to the upper surface of the valve disc, a guide tube slidably connected to the outer wall of the guide rod, and a buffer assembly provided on the inner wall of the guide tube;

[0007] The buffer assembly includes a buffer block, the outer wall of which is slidably connected to the inner wall of the guide tube. A slide rod is fixedly connected to the upper surface of the buffer block, and a slide tube is slidably connected to the outer wall of the slide rod. A spring is sleeved on the outside of the slide rod, one end of which is fixedly connected to the upper surface of the buffer block, and the other end of which is fixedly connected to the lower surface of the slide tube.

[0008] Furthermore, a slider one is fixedly connected to the outer wall of the guide rod, a groove is slidably connected to the outer wall of the slider one, the inner wall of the groove is set in the inner wall of the guide tube, and a slider two is fixedly connected to the outer wall of the buffer block, the outer wall of the slider two is slidably connected to the inner wall of the groove.

[0009] Furthermore, a valve seat is fixedly connected to the upper surface of the guide tube, and the upper surface of the slide tube is fixedly connected to the lower surface of the valve seat.

[0010] Furthermore, a groove is provided on the outer wall of the valve seat, and a sealing ring and a handle are fixedly connected to the outer wall of the valve seat.

[0011] Furthermore, an installation tube is slidably connected to the outer wall of the valve seat, and a through hole is provided on the outer wall of the installation tube.

[0012] Furthermore, a steel ball is provided on the inner wall of the through hole, and the outer wall of the steel ball is provided on the inner wall of the slot.

[0013] Furthermore, a fixing ring is fixedly connected to the outer wall of the mounting tube, and a sleeve is slidably connected to the outer wall of the fixing ring.

[0014] Furthermore, a second spring is fixedly connected to the upper surface of the fixing ring, and one end of the second spring is fixedly connected to one side of the inner wall of the sleeve.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the guide rod pushes the buffer block. When the buffer block moves upward, the impact kinetic energy is absorbed by the compression deformation of the spring. At the same time, the slide rod slides in the slide tube to generate damping friction, thereby reducing the rigid impact of the valve disc on the valve seat. This effectively alleviates the frequent impact of key components such as the valve seat and valve disc, reduces the risk of cracking and deformation, significantly improves the structural stability and service life of the valve, and thus improves the practicality of the device.

[0017] 2. In this utility model, the valve seat is disassembled and installed by means of the sleeve, spring 2, steel ball and slot to achieve quick locking and unlocking of the valve body and valve seat. No complicated tools or cumbersome operation are required, which reduces the difficulty and time cost of valve seat maintenance and replacement, thereby reducing equipment downtime for maintenance, improving operational efficiency and convenience, and thus improving the practicality of the device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a high-frequency check valve for a diaphragm pump proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the valve body structure of a high-frequency check valve for a diaphragm pump proposed in this utility model.

[0020] Figure 3This is a schematic diagram of the guide rod portion of a high-frequency check valve for a diaphragm pump proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the guide tube portion of a high-frequency check valve for a diaphragm pump proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the mounting pipe section of a high-frequency check valve for a diaphragm pump proposed in this utility model.

[0023] Figure 6 This is a schematic diagram of the sleeve structure of a high-frequency check valve for a diaphragm pump proposed in this utility model.

[0024] Legend:

[0025] 1. Valve body; 2. Inlet chamber; 3. Outlet chamber; 4. Connector 1; 5. Connector 2; 6. Valve disc; 7. Guide rod; 8. Slider 1; 9. Slide groove; 10. Guide tube; 11. Slider 2; 12. Buffer block; 13. Slide rod; 14. Spring 1; 15. Slide tube; 16. Valve seat; 17. Slot; 18. Sealing ring; 19. Handle; 20. Mounting tube; 21. Through hole; 22. Steel ball; 23. Sleeve; 24. Fixing ring; 25. Spring 2. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figures 1-4This utility model provides an embodiment of a high-frequency check valve for a diaphragm pump, comprising a valve body 1. The valve body 1 is used to separate and form an inlet chamber 2 and an outlet chamber 3, and provides an installation base for all internal components, thereby constructing the main framework of the fluid channel and providing a stable working environment for the opening and closing of the valve disc 6. The inner wall of the valve body 1 is provided with an inlet chamber 2 and an outlet chamber 3. One end of the valve body 1 is fixedly connected to a connector 4, and the other end of the valve body 1 is fixedly connected to a connector 5. Connectors 4 and 5 are threaded joints, which are used to connect to an external pipeline system to achieve a sealed connection between the valve and the pump body or pipeline. The inner wall of the valve body 1 is provided with a valve disc 6, and the upper surface of the valve disc 6 is fixed... A guide rod 7 is fixedly connected to the valve disc 6, which moves axially up and down in cooperation with the guide rod 7. This achieves the effect of opening and closing the flow channel according to changes in fluid pressure and controlling the unidirectional flow of fluid. A guide tube 10 is slidably connected to the outer wall of the guide rod 7. A buffer assembly is provided on the inner wall of the guide tube 10. The buffer assembly includes a buffer block 12. The buffer block 12 slides axially with the inner wall of the guide tube 10, transferring the impact kinetic energy when the valve disc 6 closes to the buffer assembly. This achieves the effect of initially dispersing the impact force and protecting the guide structure. The outer wall of the buffer block 12 is slidably connected to the inner wall of the guide tube 10. A slide rod 13 is fixedly connected to the upper surface of the buffer block 12. A slide rod 13 is slidably connected to the outer wall of the slide rod 13. The slide tube 15 and slide rod 13 work together to extend and retract, generating frictional damping. This absorbs impact energy and reduces damage from impacts between the valve seat 16 and valve disc 6. A spring 14 is fitted around the slide rod 13. One end of the spring 14 is fixedly connected to the upper surface of the buffer block 12, and the other end is fixedly connected to the lower surface of the slide tube 15. The spring 14 is compressed to absorb impact energy when the buffer block 12 moves upward, and releases elastic potential energy to assist the valve disc 6 in falling downward. This prevents critical components such as the valve seat 16 and valve disc 6 from cracking or deforming due to frequent impacts, and also prevents short circuits caused by slow valve disc 6 closing speed when the backflow pressure is low. Temporary backflow improves the structural reliability and operational stability of the valve. A slider 8 is fixedly connected to the outer wall of the guide rod 7. A groove 9 is slidably connected to the outer wall of the slider 8. The inner wall of the groove 9 is set on the inner wall of the guide tube 10. The slider 8 slides linearly in cooperation with the groove 9, which constrains the movement trajectory of the guide rod 7. This achieves the effect of preventing the valve disc 6 from radially deflecting or rotating during the lifting and lowering process and ensuring precise alignment and closure of the sealing surface. A slider 11 is fixedly connected to the outer wall of the buffer block 12. The outer wall of the slider 11 is slidably connected to the inner wall of the groove 9. A valve seat 16 is fixedly connected to the upper surface of the guide tube 10. The upper surface of the slide tube 15 is fixedly connected to the lower surface of the valve seat 16.

[0028] Reference Figure 2 , Figure 5 and Figure 6The valve seat 16 has a groove 17 on its outer wall. The groove 17 engages with the steel ball 22 to fix the valve seat 16 in position and prevent it from loosening during operation. A sealing ring 18 and a handle 19 are fixedly connected to the outer wall of the valve seat 16. The sealing ring 18 enhances the sealing between the valve seat 16 and the valve body 1, thereby preventing fluid leakage from the gap between the valve seat 16 and the valve body 1 and improving the sealing reliability of the check valve. The handle 19 provides a gripping point for disassembling and assembling the valve seat 16, making it easier for operators to disassemble and install the valve seat 16 and reducing maintenance difficulty. An installation tube 20 is slidably connected to the outer wall of the valve seat 16. The outer wall of the installation tube 20 has a through hole 21 for placing the steel ball. 22, thus providing space for the steel ball 22 to move. The inner wall of the through hole 21 is provided with the steel ball 22, and the outer wall of the steel ball 22 is provided with the inner wall of the slot 17. The outer wall of the mounting tube 20 is fixedly connected with the fixing ring 24, and the outer wall of the fixing ring 24 is slidably connected with the sleeve 23. The fixing ring 24 is used to fix the second spring 25 and provide sliding support for the sleeve 23. The second spring 25 is fixedly connected to the upper surface of the fixing ring 24. The second spring 25 is used to compress and store elastic potential energy when the sleeve 23 is pressed down, and release the potential energy to push the sleeve 23 to reset after being released, thereby realizing the automatic constraint of the sleeve 23 on the steel ball 22 and ensuring that the valve seat 16 can be stably locked after installation. One end of the second spring 25 is fixedly connected to one side of the inner wall of the sleeve 23.

[0029] Working principle: When the diaphragm pump generates positive fluid pressure, the fluid enters the inlet chamber 2 of the valve body 1 through connector 4. The fluid pressure pushes the valve disc 6 to move upward axially. Simultaneously, the valve disc 6 drives the guide rod 7 to move upward, thus allowing the fluid to flow to the outlet chamber 3 and be output through connector 5. The slider 8 on the guide rod 7 slides within the groove 9, precisely constraining the movement trajectory of the guide rod 7 and the valve disc 6 without deviation. Simultaneously, the guide rod 7 pushes the buffer block 12. When the buffer block 12 moves upward, the spring 14 is compressed, and the spring 14... The elastic deformation absorbs most of the impact kinetic energy, while the sliding rod 13 slides in the slide tube 15 to generate damping friction, further dissipating energy. This prevents key components such as the valve seat 16 and valve disc 6 from cracking or deforming due to frequent impacts, thus improving the structural reliability of the valve. When the pump stroke ends or the pressure difference reverses, the fluid flows in the opposite direction, and the valve disc 6 falls under the action of gravity and the reverse force of the fluid. At the same time, the spring 14 releases elastic potential energy to assist the valve disc 6 in falling, preventing the closing speed from being too slow when the backflow pressure is small, which could lead to a brief backflow.

[0030] Secondly, when the valve seat 16 needs to be disassembled, the sleeve 23 is pressed down to compress the second spring 25. The sleeve 23 moves down to release the restriction on the steel ball 22, that is, to release the restriction on the valve seat 16 by the steel ball 22. At this time, the handle 19 is pulled up to pull out the valve seat 16 and the guide tube 10 as a whole. During installation, the sleeve 23 is pressed down again and inserted into the valve seat 16. Then the sleeve 23 is released. The sleeve 23 automatically resets due to the rebound force of the second spring 25, and restricts the position of the steel ball 22 again, so that the steel ball 22 can be re-locked into the slot 17. This simplifies the disassembly and installation process of the valve seat 16, eliminating the need for complicated tools or long-term operation, reducing the difficulty and time cost of maintenance and replacement of the valve seat 16, improving operational efficiency and convenience, and reducing equipment downtime.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-frequency check valve for a diaphragm pump, comprising a valve body (1), characterized in that: The valve body (1) has an inlet cavity (2) and an outlet cavity (3) on its inner wall. One end of the valve body (1) is fixedly connected to a connector (4), and the other end of the valve body (1) is fixedly connected to a connector (5). The valve body (1) has a valve disc (6) on its inner wall. A guide rod (7) is fixedly connected to the upper surface of the valve disc (6). A guide tube (10) is slidably connected to the outer wall of the guide rod (7). A buffer assembly is provided on the inner wall of the guide tube (10). The buffer assembly includes a buffer block (12), the outer wall of which is slidably connected to the inner wall of the guide tube (10), a slide rod (13) is fixedly connected to the upper surface of the buffer block (12), a slide tube (15) is slidably connected to the outer wall of the slide rod (13), and a spring (14) is sleeved on the outside of the slide rod (13). One end of the spring (14) is fixedly connected to the upper surface of the buffer block (12), and the other end of the spring (14) is fixedly connected to the lower surface of the slide tube (15).

2. The high-frequency check valve for a diaphragm pump according to claim 1, characterized in that: The outer wall of the guide rod (7) is fixedly connected to a slider one (8), the outer wall of the slider one (8) is slidably connected to a groove (9), the inner wall of the groove (9) is set on the inner wall of the guide tube (10), the outer wall of the buffer block (12) is fixedly connected to a slider two (11), and the outer wall of the slider two (11) is slidably connected to the inner wall of the groove (9).

3. The high-frequency check valve for a diaphragm pump according to claim 1, characterized in that: A valve seat (16) is fixedly connected to the upper surface of the guide tube (10), and the upper surface of the slide tube (15) is fixedly connected to the lower surface of the valve seat (16).

4. A high-frequency check valve for a diaphragm pump according to claim 3, characterized in that: The valve seat (16) has a groove (17) on its outer wall, and a sealing ring (18) and a handle (19) are fixedly connected to the outer wall of the valve seat (16).

5. A high-frequency check valve for a diaphragm pump according to claim 3, characterized in that: The valve seat (16) is slidably connected to the outer wall of the mounting tube (20), and the outer wall of the mounting tube (20) is provided with a through hole (21).

6. A high-frequency check valve for a diaphragm pump according to claim 5, characterized in that: The inner wall of the through hole (21) is provided with a steel ball (22), and the outer wall of the steel ball (22) is provided on the inner wall of the slot (17).

7. A high-frequency check valve for a diaphragm pump according to claim 5, characterized in that: The outer wall of the mounting tube (20) is fixedly connected to a fixing ring (24), and the outer wall of the fixing ring (24) is slidably connected to a sleeve (23).

8. A high-frequency check valve for a diaphragm pump according to claim 7, characterized in that: A second spring (25) is fixedly connected to the upper surface of the fixed ring (24), and one end of the second spring (25) is fixedly connected to one side of the inner wall of the sleeve (23).

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