Self-stress sealing and water stopping valve plate structure and corresponding diaphragm pump

Abstract

The utility model provides a self-stress sealing waterstop valve plate structure and a corresponding diaphragm pump, the self-stress sealing waterstop valve plate structure comprises a valve plate body and a sealing plug body arranged on the valve plate body in a penetrating mode, the peripheral side of the sealing plug body is connected with the valve plate body through a connecting piece, and the connecting piece can elastically deform in the axial direction of the sealing plug body. One face of the sealing plug body is a sealing face used for plugging a hole, and the other face of the sealing plug body is provided with an elastic part capable of elastically deforming in the axial direction of the sealing plug body. According to the self-stress sealing and water stopping valve plate structure, the peripheral side of the sealing plug body is connected with the valve plate body through the connecting pieces, the connecting pieces and the sealing plug body have the elastic recovery capacity respectively, fatigue damage is not prone to occurring, and meanwhile assembling is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the field of pumps, in particular to a self-stress sealing and water-stopping valve plate structure and a corresponding diaphragm pump. Background Art

[0002] A pump is a machine that conveys fluid or pressurizes fluid. The application field of pumps is very wide, such as conveying various liquids, such as petroleum, chemical, food, medicine, papermaking and other industries, as well as irrigation, deep well water extraction, building drainage, fire protection and other aspects. Pumps generally achieve one-way delivery of the pump through a one-way valve structure. Among them, in the prior art, the one-way valve structure generally fixes at least one end of the valve plate, and the other end of the valve plate closes the delivery hole. The delivery hole is opened or closed under the driving force of the fluid and the elastic force of the valve plate itself. This bending elastic deformation leads to fatigue damage, which makes the pump leak. There is also a structure that uses a spring and a valve plate to achieve a one-way seal, but this structure has the problem of difficult assembly.

[0003] Therefore, it is necessary to provide a self-stressed sealing and water-stopping valve plate structure and a corresponding diaphragm pump to solve the above technical problems.

[0004] It is difficult to control the elastic force of the bell mouth when the sealing head is supported by a bell mouth. It is easy for the elastic force to be too large, causing the valve plate water outlet to be blocked, or the elastic force to be too small, causing the pump to not stop leaking. It is necessary to adjust the bell mouth wall thickness, the sealing head height, and the hardness of the valve plate several times to make the elastic support achieve the effect of stopping leakage. Utility Model Content

[0005] The utility model provides a self-stress sealing water-stopping valve plate structure and a corresponding diaphragm pump, so as to solve the problems in the prior art that the pump is prone to leakage due to fatigue damage of the valve plate and is difficult to assemble.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a self-stressed sealing and water-stopping valve plate structure, which includes a valve plate body and a sealing plug body arranged through the valve plate body, the peripheral side of the sealing plug body is connected to the valve plate body through a connecting plate, and the connecting plate can be elastically deformed along the axial direction of the sealing plug body. One side of the sealing plug body is a sealing surface for sealing the hole, and the other side is provided with an elastic part that can be elastically deformed along the axial direction of the sealing plug body.

[0007] In the utility model, the valve plate body, the connecting plate and the sealing plug body are an integrally formed structure.

[0008] In the utility model, the elastic part is an annular structure, and the axis center line of the elastic part is consistent with the axis center line of the sealing plug body.

[0009] Furthermore, the inner diameter of the elastic portion gradually increases along a direction from an end close to the sealing plug body to an end away from the sealing plug body.

[0010] The thickness of the elastic portion gradually decreases along a direction from an end close to the sealing plug body to an end away from the sealing plug body.

[0011] In the utility model, the cross-sectional structure of the connecting piece along the radial direction is a wave-like structure.

[0012] In the utility model, the connection position between the connection plate and the sealing plug body is lower than the connection position between the connection plate and the valve plate body.

[0013] In the utility model, sealing convex rings for sealing installation are arranged on both sides of the valve plate body.

[0014] The utility model also includes a diaphragm pump, which uses the above-mentioned self-stress sealing and water-stopping valve plate structure, and also includes: a connecting cover, a valve bracket, a diaphragm bracket, a diaphragm, a base, a motor, a crank, a connecting shaft, and a connecting rod;

[0015] The connecting cover is provided with an input hole and an output hole, the valve bracket is connected to the diaphragm bracket, the diaphragm is arranged between the valve bracket and the diaphragm bracket, a driving chamber is formed between the diaphragm and the valve bracket, the connecting cover is connected to the side of the valve bracket away from the diaphragm bracket, and an input chamber and an output chamber are formed between the connecting cover and the valve bracket, the input hole is communicated with the input chamber, the output hole is communicated with the output chamber, the self-stress sealing and water-stopping valve plate structure is arranged between the connecting cover and the valve bracket, the sealing plug body is unidirectionally sealed between the driving chamber and the output chamber, the elastic part is in contact with the inner wall of the connecting cover, the self-stress sealing and water-stopping valve plate structure also includes an input valve plate, and the input valve plate is unidirectionally sealed between the input hole and the input chamber;

[0016] The base is connected to a side of the diaphragm support away from the valve support, the motor is fixedly connected to the base, the crank is connected to the output end of the motor, the connecting rod is connected to the crank through the connecting shaft, and the connecting rod is connected to the diaphragm.

[0017] In the utility model, a transfer chamber is also formed between the connecting cover and the valve bracket, and the drive chamber includes a first drive chamber and a second drive chamber, the first drive chamber is connected to the input chamber, and the second drive chamber is connected to the output chamber, and the transfer chamber is connected to the first drive chamber and the second drive chamber respectively through two connecting holes, and the self-stress sealing water-stopping valve plate structure also includes a transfer valve plate, and the transfer valve plate is unidirectionally sealed between the first drive chamber and the second drive chamber.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the self-stressed sealing water-stop valve plate structure of the utility model connects the peripheral side of the sealing plug body to the valve plate body through a connecting plate, and the connecting plate and the sealing plug body each have elastic recovery ability, are not prone to fatigue damage, and are simple and convenient to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the utility model.

[0020] Figure 1 It is a schematic cross-sectional structure diagram of a preferred embodiment of the diaphragm pump of the utility model.

[0021] Figure 2 It is a schematic diagram of the exploded structure of the diaphragm pump of the utility model.

[0022] Figure 3 for Figure 1 Enlarged view of the local structure at X in the middle. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0024] Directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used for reference to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention, and are not used to limit the present invention.

[0025] The words "first", "second" and the like in the terminology of the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be construed as limiting the order of precedence.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, the connection can be a detachable connection or a connection of an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The pump in the prior art has the problem of leakage due to fatigue damage of the valve plate and difficulty in assembly.

[0028] The following is a preferred embodiment of a diaphragm pump with a valve plate structure using self-stress sealing and water-stopping, which is provided by the utility model and can solve the above technical problems.

[0029] Please refer to Figure 1 and Figure 2 , which is a cross-sectional structural diagram of a preferred embodiment of the diaphragm pump of the utility model, Figure 2 It is a schematic diagram of the exploded structure of the diaphragm pump of the utility model.

[0030] In the figures, structurally similar elements are denoted by the same reference numerals.

[0031] The utility model provides a diaphragm pump, which comprises a self-stress sealing and water-stopping valve plate structure 1A, a connecting cover 11, a valve bracket 12, a diaphragm bracket 13, a diaphragm 14, a base 15, a motor 16, a crank 17, a connecting shaft 18, and a connecting rod 19.

[0032] An input hole 111 and an output hole 112 are provided on the connecting cover 11, the valve bracket 12 and the diaphragm bracket 13 are connected, the diaphragm 14 is provided between the valve bracket 12 and the diaphragm bracket 13, a driving chamber is formed between the diaphragm 14 and the valve bracket 12, the connecting cover 11 is connected to the side of the valve bracket 12 away from the diaphragm bracket 13, and an input chamber 121 and an output chamber 122 are formed between the connecting cover 11 and the valve bracket 12, the input hole 111 is communicated with the input chamber 121, and the output hole 112 is communicated with the output chamber 122.

[0033] The self-stress sealing and water-stopping valve plate structure 1A is arranged between the connecting cover 11 and the valve bracket 12, the sealing plug body 1A4 is unidirectionally sealed between the driving chamber and the output chamber 122, the elastic part 1A41 is in contact with the inner wall of the connecting cover 11, and the self-stress sealing and water-stopping valve plate structure 1A also includes an input valve plate 1A1, which is unidirectionally sealed between the input hole 111 and the input chamber 121.

[0034] The base 15 is connected to a side of the diaphragm support 13 away from the valve support 12, the motor 16 is fixedly connected to the base 15, the crank 17 is connected to the output end of the motor 16, the connecting rod 19 is connected to the crank 17 through the connecting shaft 18, the connecting rod 19 is connected to the diaphragm 14, and the connecting rod 19 is driven by the motor 16 to operate, thereby squeezing or pulling the diaphragm 14, so that the pressure in the driving chamber increases or decreases, and then the fluid enters from the input hole 111 and is output from the output hole 112.

[0035] In this embodiment, a transfer chamber 123 is further formed between the connection cover 11 and the valve support 12, the drive chamber includes a first drive chamber 1B1 and a second drive chamber 1B2, the diaphragm 14 has two leather cup structures corresponding to the first drive chamber 1B1 and the second drive chamber 1B2, the first drive chamber 1B1 is connected to the input chamber 121, the second drive chamber 1B2 is connected to the output chamber 122, the transfer chamber 123 is connected to the first drive chamber 1B1 and the second drive chamber 1B2 through two connecting holes, and the self-stress sealing water-stop valve plate structure 1A also includes a transfer valve plate 1A2, and the transfer valve plate 1A2 is unidirectionally sealed between the first drive chamber 1B1 and the second drive chamber 1B2. The activity of the first drive chamber 1B1 can drive the fluid from the input chamber 121 to the transfer chamber 123 for transportation, and the activity of the second drive chamber 1B2 can drive the fluid from the transfer chamber 123 to the output chamber 122.

[0036] The arrangement of the transfer chamber 123 and the transfer valve plate 1A2 makes the fluid delivery efficiency higher and prevents backflow.

[0037] Please refer to Figure 2 The diaphragm pump also includes a clamp ring 1C, which is a U-shaped structure. The two clamp rings 1C are respectively clamped on the connecting cover 11, the valve bracket 12, the diaphragm bracket 13, and the two ends of the outer periphery of the base 15, which are convenient for disassembly and assembly.

[0038] Please refer to Figure 3 In this embodiment, the self-stress sealing water-stop valve plate structure 1A includes a valve plate body 1A3 and a sealing plug body 1A4 which is arranged on the valve plate body 1A3. The peripheral side of the sealing plug body 1A4 is connected to the valve plate body 1A3 through a connecting plate 1A5. The connecting plate 1A5 can be elastically deformed along the axial direction of the sealing plug body 1A4. One side of the sealing plug body 1A4 is a sealing surface for blocking the hole. The sealing surface is specifically a delivery hole 1221 which is connected to the second driving chamber 1B2 on one side of the closed output chamber 122. The other side is provided with an elastic part 1A41 which can be elastically deformed along the axial direction of the sealing plug body 1A4. The connecting plate 1A5 and the sealing plug body 1A4 each have elastic recovery ability, are not easy to be damaged by fatigue, and are simple and convenient to assemble.

[0039] In this embodiment, the valve plate body 1A3, the connecting plate 1A5 and the sealing plug body 1A4 are an integrally formed structure, which is stable and easy to assemble.

[0040] In this embodiment, the elastic part 1A41 is an annular structure, and the axis of the elastic part 1A41 is consistent with the axis of the sealing plug body 1A4. The inner wall of the connection cover 11 in contact with the elastic part 1A41 is provided with a connecting groove connecting the inner cavity of the elastic part 1A41 with the outer space of the elastic part 1A41.

[0041] Furthermore, the inner diameter of the elastic portion 1A41 gradually increases from an end close to the sealing plug body 1A4 to an end away from the sealing plug body 1A4, which is beneficial to the elastic deformation of the elastic portion 1A41.

[0042] Among them, the thickness of the elastic part 1A41 gradually decreases from one end close to the sealing plug body 1A4 to the end away from the sealing plug body 1A4, so that as the sealing plug body 1A4 moves away from the valve bracket 12, the elastic force of the elastic part 1A41 will gradually increase.

[0043] In this embodiment, the cross-sectional structure of the connecting piece 1A5 along the radial direction is a wave-like structure, which is convenient for elastic deformation.

[0044] In this embodiment, the connection position between the connection piece 1A5 and the sealing plug body 1A4 is lower than the connection position between the connection piece 1A5 and the valve piece body 1A3, so that the connection piece 1A5 can better exert its elastic force.

[0045] In this embodiment, sealing convex rings 1A6 for sealing installation are provided on both sides of the valve plate body 1A3, so that the self-stress sealing and water-stopping valve plate structure 1A is stably sealed and arranged between the connecting cover 11 and the valve bracket 12.

[0046] The diaphragm pump of the valve plate structure with self-stress sealing and water-stopping in the preferred embodiment connects the peripheral side of the sealing plug body to the valve plate body through a connecting plate. The connecting plate and the sealing plug body each have elastic recovery capabilities. When the fluid driving force does not reach the set value, the elastic force of the connecting plate cooperates with the elastic force generated by the extrusion of the elastic part and the connecting cover, so that the sealing plug body blocks the delivery hole and is not prone to fatigue damage. At the same time, it is simple and convenient to assemble.

[0047] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A self-stress sealing water-stop valve plate structure, characterized in that: It includes a valve plate body and a sealing plug body which is arranged through the valve plate body. The peripheral side of the sealing plug body is connected to the valve plate body through a connecting plate. The connecting plate can be elastically deformed along the axial direction of the sealing plug body. One side of the sealing plug body is a sealing surface for sealing the hole, and the other side is provided with an elastic part which can be elastically deformed along the axial direction of the sealing plug body.

2. The self-stress sealing water-stopping valve plate structure according to claim 1 is characterized in that: The valve plate body, the connecting plate and the sealing plug body are an integrally formed structure.

3. The self-stress sealing and water-stopping valve plate structure according to claim 1 is characterized in that: The elastic part is an annular structure, and the axis center line of the elastic part is consistent with the axis center line of the sealing plug body.

4. The self-stress sealing water-stopping valve plate structure according to claim 3 is characterized in that: The inner diameter of the elastic portion gradually increases from an end close to the sealing plug body to an end away from the sealing plug body.

5. The self-stress sealing and water-stopping valve plate structure according to claim 3 or 4, characterized in that: The thickness of the elastic portion gradually decreases from an end close to the sealing plug body to an end away from the sealing plug body.

6. The self-stress sealing and water-stopping valve plate structure according to claim 1 is characterized in that: The cross-sectional structure of the connecting piece along the radial direction is a wave-shaped structure.

7. The self-stress sealing and water-stopping valve plate structure according to claim 1 is characterized in that: The connection position between the connecting plate and the sealing plug body is lower than the connection position between the connecting plate and the valve plate body.

8. The self-stress sealing and water-stopping valve plate structure according to claim 1 is characterized in that: Both sides of the valve plate body are provided with sealing convex rings for sealing installation.

9. A diaphragm pump, characterized in that: The self-stress sealing water-stopping valve plate structure using any one of claims 1 to 8 further comprises: a connecting cover, a valve bracket, a diaphragm bracket, a diaphragm, a base, a motor, a crank, a connecting shaft, and a connecting rod; The connecting cover is provided with an input hole and an output hole, the valve bracket is connected to the diaphragm bracket, the diaphragm is arranged between the valve bracket and the diaphragm bracket, a driving chamber is formed between the diaphragm and the valve bracket, the connecting cover is connected to the side of the valve bracket away from the diaphragm bracket, and an input chamber and an output chamber are formed between the connecting cover and the valve bracket, the input hole is communicated with the input chamber, the output hole is communicated with the output chamber, the self-stress sealing and water-stopping valve plate structure is arranged between the connecting cover and the valve bracket, the sealing plug body is unidirectionally sealed between the driving chamber and the output chamber, the elastic part is in contact with the inner wall of the connecting cover, the self-stress sealing and water-stopping valve plate structure also includes an input valve plate, and the input valve plate is unidirectionally sealed between the input hole and the input chamber; The base is connected to a side of the diaphragm support away from the valve support, the motor is fixedly connected to the base, the crank is connected to the output end of the motor, the connecting rod is connected to the crank through the connecting shaft, and the connecting rod is connected to the diaphragm.

10. The diaphragm pump according to claim 9, characterized in that A transfer chamber is also formed between the connecting cover and the valve bracket, and the drive chamber includes a first drive chamber and a second drive chamber. The first drive chamber is connected to the input chamber, and the second drive chamber is connected to the output chamber. The transfer chamber is connected to the first drive chamber and the second drive chamber respectively through two connecting holes. The self-stress sealing water-stopping valve plate structure also includes a transfer valve plate, and the transfer valve plate is unidirectionally sealed between the first drive chamber and the second drive chamber.

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