Diaphragm pump with three-cantilever valve plate

The three-cantilever valve plate design solves the problems of single cantilever leakage and double cantilever slow response and easy wear, achieving better sealing and service life.

CN223359365UActive Publication Date: 2025-09-19DONGGUAN JURUI ELECTRIC TECH CO LTD
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Patent Information

Application Number
CN202422778012.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-13
Publication Date
2025-09-19
Estimated Expiration
2034-11-13

AI Technical Summary

Technical Problem

The existing single-cantilever valve plate has leakage problems, and the double-cantilever valve plate has slow response and is easy to wear, affecting the sealing performance and service life.

Method used

A three-cantilever valve disc design is adopted. The outer sealing ring is connected to the valve core through three curved cantilevers. The cantilevers are evenly spaced around the valve core axis to achieve a three-cantilever structure. The cantilevers are S-shaped with an angle of 120°. There is a positioning ring at the lower end of the outer sealing ring.

Benefits of technology

The leakage problem of the single cantilever valve disc and the slow response and easy wear problem of the double cantilever valve disc are improved, and the sealing performance and service life are improved.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN223359365U_ABST
    Figure CN223359365U_ABST
Patent Text Reader

Abstract

The diaphragm pump comprises a valve body and a pump body, the valve body is connected with the pump body, a diaphragm cavity is arranged in the pump body, the valve body is provided with a liquid inlet channel and a liquid outlet channel, the liquid inlet channel is communicated with the liquid outlet channel through the diaphragm cavity, and the diaphragm cavity is communicated with the liquid outlet channel through the diaphragm cavity. Valve plates are arranged in the liquid inlet channel and the liquid outlet channel; the valve piece comprises an outer sealing ring and a valve element arranged in the outer sealing ring, the outer sealing ring and the valve element are connected through three bent cantilevers, and the three cantilevers are sequentially and evenly arranged on the periphery of the valve element at intervals in the circumferential direction around the axis of the valve element. Therefore, the leakage problem of a single-cantilever valve plate and the problems that a double-cantilever valve plate is slow in response and easy to wear are solved.
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Description

Technical Field

[0001] The utility model relates to the field of diaphragm pump technology, in particular to a diaphragm pump with three-cantilever valve plates. Background Art

[0002] When the diaphragm pump is working, it needs to rely on a one-way valve plate (referred to as "valve plate") to control the flow direction and on-off of the fluid. The performance of the valve plate is reflected in good sealing, fast response, high efficiency, stability and durability. The valve plates widely used in the industry are single cantilever valves or double cantilever valves made of rubber. When the valve plate is installed, the valve port will generally be higher than the valve core of the valve plate (i.e., the pre-tightening height). The valve core is lifted up to generate a certain pre-tensioning force, so that the valve core can fit the valve port firmly to ensure the sealing effect. The single cantilever valve has the advantages of flexible opening and closing and a large flow coefficient. However, during assembly, the valve core is lifted up by the valve port, which will cause a certain tilt and cannot be parallel and completely covered on the valve port. Therefore, there will be a certain amount of leakage during operation, resulting in deficiencies in sealing and volumetric efficiency. The characteristics of the double cantilever valve are that the cantilever stiffness is large. With the same pre-tightening height, the tensioning force is much greater than that of the single cantilever valve, so the sealing performance is very good, but the flexibility of movement (responsiveness) will be sacrificed. Moreover, after long-term use, the higher pre-tightening force will accelerate the wear and aging of the rubber, thereby losing the sealing effect and failing prematurely.

[0003] Therefore, it is necessary to develop a new technology to solve the above problems. Utility Model Content

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a diaphragm pump with three cantilever valve plates, which improves the leakage problem of the single cantilever valve plate and the slow response and easy wear problem of the double cantilever valve plate.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A diaphragm pump with a three-cantilever valve plate includes a valve body and a pump body, the valve body is connected to the pump body, a diaphragm cavity is provided in the pump body, the valve body has a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel are connected through the diaphragm cavity, and valve plates are provided in the liquid inlet channel and the liquid outlet channel; the valve plate includes an outer sealing ring and a valve core arranged in the outer sealing ring, the outer sealing ring and the valve core are connected by three curved cantilevers, and the three cantilevers are arranged in sequence around the axis of the valve core at uniform intervals along the circumferential direction on the periphery of the valve core.

[0007] As a preferred solution, the cantilever is S-shaped.

[0008] As a preferred solution, both ends of the cantilever are integrally connected to the inner peripheral side wall of the outer sealing ring and the outer peripheral side wall of the valve core respectively.

[0009] As a preferred solution, the angle between two adjacent cantilevers is 120°.

[0010] As a preferred solution, a through hole is formed between two adjacent cantilevers.

[0011] As a preferred solution, a positioning ring portion is integrally provided on the circumference of the lower end of the outer sealing ring and protrudes downward.

[0012] As a preferred solution, the valve plate is made of rubber.

[0013] As a preferred solution, the lower end of the pump body is connected to a box body, the diaphragm cavity is arranged between the pump body and the box body, a driving mechanism is provided on the box body, one end of the driving mechanism is connected to a diaphragm, the diaphragm is fixed between the pump body and the box body, the diaphragm cavity is formed between the diaphragm and the pump body, and the driving mechanism drives the diaphragm to reciprocate up and down.

[0014] As a preferred solution, an inlet valve port and an outlet valve port are provided between the pump body and the valve body, the liquid inlet channel is connected to the upper end of the water inlet valve port, the liquid outlet channel is connected to the upper end of the water outlet valve port, the lower end of the water inlet valve port is connected to the lower end of the water outlet valve port through a diaphragm cavity, and the valve plates are provided at both the water inlet valve port and the water outlet valve port.

[0015] As a preferred solution, the upper end of the valve body is connected to a cover plate, a buffer cavity is formed between the cover plate and the valve body, a water inlet and a water outlet are provided on the valve body, the water inlet and the water outlet are respectively connected to the buffer cavity, and the liquid inlet channel and the liquid outlet channel are respectively connected to the buffer cavity.

[0016] The utility model has obvious advantages and beneficial effects compared with the prior art, specifically, it can be seen from the above technical scheme that it mainly realizes that the valve plate includes an outer sealing ring and a valve core arranged in the outer sealing ring, and the outer sealing ring and the valve core are connected by three curved cantilevers, and the three cantilevers are arranged at uniform intervals on the periphery of the valve core in the circumferential direction around the axis of the valve core. In this way, a three-cantilever valve plate structure design is realized, and the three cantilevers of the three-cantilever valve plate are evenly stressed. When working, the valve core moves up and down straightly under the action of the fluid medium, avoiding the problem of insufficient sealing of the single cantilever valve plate when opening and closing in a fan shape. At the same time, the curved cantilever has a longer path, avoiding the problem that the cantilever of the double cantilever valve plate is directly connected from the outer sealing ring to the valve core over a short distance. With a short distance direct connection and the same width, the rigidity of the cantilever is obviously higher, and the valve requires a greater thrust to open, and the response becomes slower, thereby improving the leakage problem of the single cantilever valve plate and the slow response and easy wear problems of the double cantilever valve plate.

[0017] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 This is an exploded schematic diagram of an embodiment of the present utility model;

[0020] Figure 3 This is another exploded schematic diagram of an embodiment of the present utility model;

[0021] Figure 4 It is a cross-sectional schematic diagram of an embodiment of the present utility model;

[0022] Figure 5 This is a three-dimensional schematic diagram of a valve plate according to an embodiment of the present utility model;

[0023] Figure 6 This is a three-dimensional schematic diagram of the valve plate of an embodiment of the present utility model from another angle;

[0024] Figure 7 It is a top view of the valve plate of an embodiment of the present utility model.

[0025] Description of the accompanying drawings:

[0026] 10. Valve body 11. Liquid inlet channel

[0027] 12. Liquid outlet channel 13. Water inlet

[0028] 14. Water outlet 15. Partition

[0029] 16. First buffer cavity 17. Second buffer cavity

[0030] 20. Pump body 21. Diaphragm cavity

[0031] 30. Valve plate 31. External sealing ring

[0032] 32. Valve core 33. Cantilever

[0033] 34, through hole 35, positioning ring

[0034] 40, box body 50, diaphragm

[0035] 60, water inlet valve port 70, water outlet valve port

[0036] 80. Cover plate 90. Motor. DETAILED DESCRIPTION

[0037] Please refer to Figures 1 to 7 As shown, it shows the specific structure of an embodiment of the present utility model.

[0038] A diaphragm pump with a three-cantilever valve plate includes a valve body 10 and a pump body 20, the valve body 10 is connected to the pump body 20, a diaphragm cavity 21 is provided in the pump body 20, the valve body 10 has an inlet channel 11 and a liquid outlet channel 12, the inlet channel 11 and the outlet channel 12 are connected through the diaphragm cavity 21, and a valve plate 30 is provided in the inlet channel 11 and the outlet channel 12; the lower end of the pump body 20 is connected to the box body 40, the diaphragm cavity 21 is provided between the pump body 20 and the box body 40, the box body 40 is provided with a driving mechanism, one end of the driving mechanism is connected to a diaphragm plate 50, the diaphragm plate 50 is fixed between the pump body 20 and the box body 40, the diaphragm cavity 21 is formed between the diaphragm plate 50 and the pump body 20, and the driving mechanism drives the diaphragm plate 50 to reciprocate up and down.

[0039] In this embodiment, the drive mechanism may include a motor 90 and a transmission mechanism. The motor 90 is disposed on the housing 40, and the transmission mechanism is disposed within the housing 40. One end of the transmission mechanism is connected to the motor 90, and the other end is connected to the diaphragm 50. The motor 90 drives the transmission mechanism to cause the diaphragm 50 to reciprocate. Furthermore, preferably, the transmission mechanism may include an eccentric shaft, a bearing, and a connecting rod. The eccentric shaft is disposed on the motor 90, the bearing is sleeved on the eccentric shaft, and the connecting rod is sleeved on the bearing, with one end of the connecting rod connected to the diaphragm 50. The eccentric shaft is driven to rotate by the motor 90, and the eccentric shaft pulls the connecting rod up and down, thereby pulling the diaphragm 50 up and down.

[0040] An inlet valve port 60 and an outlet valve port 70 are provided between the pump body 20 and the valve body 10. The liquid inlet channel 11 is connected to the upper end of the water inlet valve port 60, and the liquid outlet channel 12 is connected to the upper end of the water outlet valve port 70. The lower end of the water inlet valve port 60 is connected to the lower end of the water outlet valve port 70 through the diaphragm cavity 21. The valve plate 30 is provided at both the water inlet valve port 60 and the water outlet valve port 70.

[0041] The upper end of the valve body 10 is detachably connected to a cover plate 80 via screws, and a buffer cavity is formed between the cover plate 80 and the valve body 10. The valve body 10 is provided with a water inlet 13 and a water outlet 14, which are respectively connected to the buffer cavity, and the liquid inlet channel 11 and the liquid outlet channel 12 are respectively connected to the buffer cavity. Preferably, a partition 15 is provided inside the buffer cavity, which divides the buffer cavity into a first buffer cavity 16 and a second buffer cavity 17. The first buffer cavity 16 is connected to the water inlet 13 and the liquid inlet channel 11, and the second buffer cavity 17 is connected to the liquid outlet channel 12 and the water outlet 14.

[0042] The valve plate 30 is made of rubber and includes an outer sealing ring 31 and a valve core 32 disposed within the outer sealing ring 31. The outer sealing ring 31 and the valve core 32 are connected by three curved cantilever arms 33. The three cantilever arms 33 are arranged at even intervals around the axis of the valve core 32 along the circumferential direction. Preferably, the cantilever arms 33 are S-shaped, with the angle between two adjacent cantilever arms 33 being 120°. A through hole 34 is formed between two adjacent cantilever arms 33. Here, a three-cantilever valve plate structure design is realized. The three cantilevers 33 of the three-cantilever valve plate are evenly stressed, which constrains the valve core 32 to make straight up and down opening and closing movements during operation, avoiding the problem of insufficient sealing of the single cantilever 33 valve plate 30 when doing fan-shaped opening and closing. At the same time, the curved cantilever 33 has a longer path, avoiding the problem of the cantilever 33 of the double cantilever 33 valve plate 30 being directly connected from the outer sealing ring 31 to the valve core 32 over a short distance. With a short direct connection and the same width, the rigidity of the cantilever 33 is obviously higher, and a greater thrust is required to open the valve, resulting in a slower response.

[0043] The ends of the cantilever 33 are integrally connected to the inner circumferential sidewall of the outer sealing ring 31 and the outer circumferential sidewall of the valve core 32, respectively. The cantilever 33 originates from the outer sealing ring 31 and is offset at a certain angle to connect to the valve core 32, thus forming an S-shape. The offset angle can be flexibly adjusted to meet the required pre-tensioning force, and the length of the cantilever 33 can also be flexibly adjusted to adjust its rigidity and achieve an appropriate pre-tensioning force. Furthermore, a positioning ring portion 35 is integrally formed on the lower periphery of the outer sealing ring 31, projecting downwardly. This positioning ring portion 35 allows the valve plate 30 to be positioned within the positioning groove on the water inlet valve port 60 or the water outlet valve port 70.

[0044] The working principle is roughly as follows:

[0045] Driven by the motor 90 and the connecting rod, the diaphragm 50 performs reciprocating motion up and down. When the diaphragm 50 moves downward, the volume of the diaphragm cavity 21 between the diaphragm 50 and the pump body 20 increases, generating negative pressure. The valve plate 30 at the water inlet valve port 60 opens under the action of the negative pressure, allowing fluid to enter the diaphragm cavity 21 from the outside, and the valve plate 30 at the water outlet valve port 70 is closed and sealed.

[0046] When the diaphragm 50 reaches its bottom dead center, it begins to move upward, driven by the motor 90. The fluid in the diaphragm cavity 21 is pressurized, pushing open the valve plate 30 at the outlet valve port 70 and discharging the fluid. The valve plate 30 at the inlet valve port 60 is closed and sealed. Furthermore, under the negative or positive pressure of the fluid, the three cantilevered arms 33 of the three-arm valve plate are evenly stressed, constraining the valve core 32 to open and close in a straight upward and downward motion.

[0047] The present invention relates to a valve core that is provided with a plurality of cantilever arms, each of which is connected to the valve core by a plurality of cantilever arms. The three cantilever arms are arranged at uniform intervals on the periphery of the valve core in the circumferential direction around the axis of the valve core. In this way, a three-cantilever valve plate structure design is realized. The three cantilevers of the three-cantilever valve plate are evenly stressed. When the valve core is in operation, the valve core moves up and down straightly under the action of the fluid medium, thereby avoiding the problem of insufficient sealing of the single cantilever valve plate when opening and closing in a fan shape. At the same time, the curved cantilever has a longer path, thereby avoiding the problem of the cantilever of the double cantilever valve plate being directly connected from the outer sealing ring to the valve core in a short distance. With a short direct connection and the same width, the rigidity of the cantilever is obviously higher, and the valve needs a greater thrust to open, and the response becomes slower, thereby improving the leakage problem of the single cantilever valve plate and the slow response and easy wear problem of the double cantilever valve plate.

[0048] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A diaphragm pump with a three-cantilever valve plate, comprising a valve body and a pump body, the valve body being connected to the pump body, a diaphragm cavity being provided within the pump body, the valve body having a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel being connected via the diaphragm cavity, and valve plates being provided in both the liquid inlet channel and the liquid outlet channel; characterized in that: The valve plate includes an outer sealing ring and a valve core arranged in the outer sealing ring. The outer sealing ring and the valve core are connected by three curved cantilevers. The three cantilevers are arranged in sequence around the axis of the valve core at uniform intervals along the circumferential direction on the periphery of the valve core.

2. The diaphragm pump with a three-cantilever valve plate according to claim 1, characterized in that: The cantilever is S-shaped.

3. The diaphragm pump with a three-cantilever valve plate according to claim 1, characterized in that: The two ends of the cantilever are integrally connected to the inner peripheral side wall of the outer sealing ring and the outer peripheral side wall of the valve core respectively.

4. The diaphragm pump with a three-cantilever valve plate according to claim 1, characterized in that: The included angle between two adjacent cantilevers is 120°.

5. The diaphragm pump with a three-cantilever valve plate according to claim 1, characterized in that: A through hole is formed between two adjacent cantilevers.

6. The diaphragm pump with a three-cantilever valve plate according to claim 1, characterized in that: A positioning ring portion is integrally provided on the periphery of the lower end of the outer sealing ring and protrudes downward.

7. The diaphragm pump with a three-cantilever valve plate according to claim 1, characterized in that: The valve sheet is made of rubber.

8. The diaphragm pump with a three-cantilever valve plate according to claim 1, characterized in that: The lower end of the pump body is connected to the box body, the diaphragm cavity is arranged between the pump body and the box body, the box body is provided with a driving mechanism, one end of the driving mechanism is connected to a diaphragm, the diaphragm is fixed between the pump body and the box body, the diaphragm cavity is formed between the diaphragm and the pump body, and the driving mechanism drives the diaphragm to reciprocate up and down.

9. The diaphragm pump with a three-cantilever valve plate according to claim 8, characterized in that: An inlet valve port and an outlet valve port are provided between the pump body and the valve body. The liquid inlet channel is connected to the upper end of the water inlet valve port, and the liquid outlet channel is connected to the upper end of the water outlet valve port. The lower end of the water inlet valve port is connected to the lower end of the water outlet valve port through a diaphragm cavity. The valve plates are provided at both the water inlet valve port and the water outlet valve port.

10. The diaphragm pump with a three-cantilever valve plate according to claim 8, characterized in that: The upper end of the valve body is connected to a cover plate, and a buffer cavity is formed between the cover plate and the valve body. The valve body is provided with a water inlet and a water outlet, and the water inlet and the water outlet are respectively connected to the buffer cavity, and the liquid inlet channel and the liquid outlet channel are respectively connected to the buffer cavity.