Diaphragm type one-way valve

Abstract

The utility model relates to the field of one-way valves, in particular to a diaphragm type one-way valve which comprises a valve body, a valve plate, a diaphragm, a gasket and a pressing accessory. During use, when fluid flows to the water outlet from the water inlet, the diaphragm is bent towards the water outlet under the action of differential pressure, so that the diaphragm part is far away from the water passing hole and the inner wall of the valve body, the valve body is in a conducting state at the moment, and the fluid can smoothly flow to the water outlet from the water inlet; when fluid flows from the water outlet to the water inlet, the diaphragm is bent towards the water inlet under the action of pressure difference, so that the diaphragm is tightly attached to the valve plate or the inner wall of the valve body, the valve body is in a cut-off state at the moment, the fluid cannot flow from the water outlet to the water inlet, the purpose of one-way flowing is achieved, and meanwhile the diaphragm is abutted against through the pressing part of the pressing accessory to prevent the diaphragm from falling off. The non-return valve is simple in structure, convenient to install, high in practicability, reliable in work and low in manufacturing cost, and the non-return sensitivity to different pressure pipelines can be improved by replacing diaphragms with different thicknesses.

Description

Technical Field

[0001] The utility model relates to the field of one-way valves, in particular to a diaphragm type one-way valve. Background Art

[0002] One-way valve is one of the commonly used valves in pipeline engineering. It is used to prevent the backflow of medium in the pipeline. One-way valve is an automatic valve that opens and closes by medium pressure. It is used in pipelines that only allow medium to flow in one direction. Most of the current one-way valves have complex structures and high manufacturing and maintenance costs. Summary of the invention

[0003] In view of the deficiencies raised in the above background technology, the utility model provides a diaphragm type one-way valve.

[0004] The utility model adopts the following technical solutions:

[0005] A diaphragm type one-way valve, characterized in that the one-way valve comprises:

[0006] A valve body, wherein two ends of the valve body are respectively a water inlet and a water outlet, and the valve body at the water outlet protrudes outwards to form a clamping ring;

[0007] A valve plate, wherein the valve plate is arranged in the valve body, the side wall of the valve plate is connected to the inner wall of the valve body, the valve plate is penetrated by a mounting hole and a plurality of water holes, the mounting hole is arranged in the center of the valve plate, the mounting hole and the water holes are independent of each other, and the water holes are arranged outside the mounting hole;

[0008] A diaphragm, wherein a mounting rod is provided on the bottom surface of the diaphragm, an inwardly recessed mounting groove is provided on the outer surface of the mounting rod, and both the diaphragm and the mounting rod are made of elastic material;

[0009] A gasket, which is detachably arranged on the clamping ring and is made of elastic material;

[0010] A clamping accessory, the clamping accessory comprising a mounting plate and a clamping portion, the mounting plate being detachably disposed between the clamping ring and the gasket, a clamping portion protruding downwardly being disposed at the center of the bottom surface of the mounting plate, and a plurality of water-permeable holes penetrating the mounting plate;

[0011] Wherein, the diaphragm is detachably arranged on an end surface of the valve plate close to the water outlet. When the diaphragm is assembled to the valve plate, the mounting rod is inserted into the mounting hole, and the valve plate around the mounting hole is placed in the mounting groove. The diaphragm is used to control the on and off of the valve body. When the mounting plate is placed between the retaining ring and the gasket, the clamping portion presses against the diaphragm.

[0012] As a further improvement, the diaphragm and the mounting rod are integrally formed.

[0013] As a further improvement, the diaphragm is made of silica gel material.

[0014] As a further improvement, the mounting plate and the pressing portion are integrally formed.

[0015] As a further improvement, the gasket is made of rubber material.

[0016] As a further improvement, an inwardly recessed groove is provided on the inner ring wall of the gasket. When the gasket is assembled onto the retaining ring, the gasket is sleeved on the outer side of the retaining ring and the mounting plate, and the retaining ring and the mounting plate are both embedded in the groove.

[0017] As a further improvement, the valve body and the valve plate are integrally formed.

[0018] From the above description of the structure of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages: when in use, when the fluid flows from the water inlet to the water outlet, the diaphragm bends toward the water outlet under the action of the pressure difference, so that the diaphragm part is away from the water hole and the inner wall of the valve body. At this time, the valve body is in a conducting state, and the fluid can flow smoothly from the water inlet to the water outlet; when the fluid flows from the water outlet to the water inlet, the diaphragm bends toward the water inlet under the action of the pressure difference, so that the diaphragm is close to the valve plate or the inner wall of the valve body. At this time, the valve body is in a cut-off state, and the fluid cannot flow from the water outlet to the water inlet, thereby achieving the purpose of unidirectional flow, and at the same time, the diaphragm is pressed against the clamping part of the clamping fitting to prevent the diaphragm from falling off. The utility model has a simple structure, is easy to install, has strong practicality, works reliably, has low manufacturing cost, and can improve the check sensitivity for different pressure pipelines by replacing diaphragms of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the valve body and the valve plate.

[0020] Figure 2 Schematic diagram of the three-dimensional structure of the diaphragm.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the valve body, valve plate and diaphragm.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the gasket.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the valve body, diaphragm and gasket.

[0024] Figure 6 It is a schematic diagram of the structure of the clamping accessories.

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the utility model.

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of the utility model.

[0027] Fig. 9 It is a schematic diagram of the cross-sectional structure when the diaphragm has another shape.

[0028] Fig.10 This is a schematic diagram of the cross-sectional structure of the utility model assembled into a pipeline. DETAILED DESCRIPTION

[0029] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0030] As attached Figure 7 and Figure 8 As shown, a diaphragm type one-way valve comprises a valve body 1, a valve plate 2, a diaphragm 3, a gasket 4 and a pressing fitting 5.

[0031] As attached Figures 1 to 3 As shown, the two ends of the valve body 1 are respectively a water inlet 11 and a water outlet 12, and a valve plate 2 is provided in the valve body 1, and the side wall of the valve plate 2 is connected to the inner wall of the valve body 1, and the valve plate 2 is used to cut off the valve body 1, wherein a plurality of water holes 22 are passed through the valve plate 2, and the water holes 22 are used for the flow of water in the valve body 1, and a diaphragm 3 is provided on the end surface of the valve plate 2 close to the water outlet 12, and the center of the diaphragm 3 is connected to the valve plate 2, and the diaphragm 3 is made of elastic material, specifically silicone material, which has good corrosion resistance, good plasticity and adhesion, and good comprehensive durability, and can maintain its mechanical strength and elasticity for a long time, and is safe and environmentally friendly, does not contain any harmful substances, and is harmless to the human body. It can ensure the service life of the diaphragm 3 while avoiding contamination of the fluid flowing in the valve body 1. The diaphragm 3 is used to control the on and off of the valve body 1. Specifically, when the fluid flows from the water inlet 11 to the water outlet 12, the diaphragm 3 bends toward the water outlet 12 under the action of the pressure difference, so that the main part of the diaphragm 3 is away from the water hole 22 and the inner wall of the valve body 1. At this time, the valve body 1 is in a conducting state, and the fluid can smoothly flow from the water inlet 11 to the water outlet 12; when the fluid flows from the water outlet 12 to the water inlet 11, the diaphragm 3 bends toward the water inlet 11 under the action of the pressure difference, so that the diaphragm 3 is close to the valve plate 2 or the inner wall of the valve body 1. At this time, the valve body 1 is in a cut-off state, and the fluid cannot flow from the water outlet 12 to the water inlet 11, thereby achieving the purpose of unidirectional flow. The valve body 1 and the valve plate 2 are integrally formed by injection molding, and can be specifically made of synthetic plastics, which have high hardness and are not easy to age or break. Among them, as shown in the attached Figure 8 and Fig. 9 As shown, the diaphragm 3 can be made into a trumpet shape or a flat plate shape. When the diaphragm 3 is in a trumpet shape, the edge of the diaphragm 3 and the valve body 1 can be separated, so that there is a gap between the edge of the diaphragm 3 and the valve body 1 to facilitate the flow of fluid.

[0032] It is worth mentioning that Figures 1 to 3 As shown, the diaphragm 3 is detachably arranged on the end surface of the valve plate 2. Specifically, a mounting hole 21 is penetrated in the center of the valve plate 2. The mounting hole 21 and the water hole 22 are independent of each other, and the water hole 22 is arranged outside the mounting hole 21. A mounting rod 31 is arranged at the center of the bottom surface of the diaphragm 3. The outer surface of the mounting rod 31 is provided with an inwardly recessed mounting groove 32. The diaphragm 3 and the mounting rod 31 are integrally formed by injection molding, and can be made of silicone material and can be elastically deformed. When assembling the diaphragm 3 and the valve plate 2, the mounting rod 31 is inserted into the mounting hole 21. During the process, the mounting rod 31 elastically shrinks inward until the valve plate 2 around the mounting hole 21 is placed in the mounting groove 32. The mounting hole 21 is clamped on the outside of the mounting rod 31. The inner wall of the mounting hole 21 restricts the outer surface of the mounting rod 31, so that the diaphragm 3 can be quickly and stably fixed on the valve plate 2 for use; and when the diaphragm 3 needs to be replaced, the diaphragm 3 only needs to be pulled out of the mounting hole 21 by force, which is convenient and quick.

[0033] In addition, as attached Figure 1 , Figure 4 , Figure 5 and Fig.10 As shown, a gasket 4 is provided at one end of the valve body 1 near the water outlet 12, and the gasket 4 is detachably connected to the valve body 1. Specifically, the valve body 1 at the water outlet 12 bulges outward to form a clamping ring 13, and a clamping groove 41 that is recessed inward is provided on the inner ring wall of the gasket 4. The gasket 4 is made of elastic material, and can be made of rubber material. Rubber has good sealing performance, shock absorption and energy absorption capacity, insulation performance and corrosion resistance, so that rubber can provide good sealing performance to prevent liquid, gas or dust from infiltrating or leaking. When assembling the gasket 4 and the clamping ring 13, the gasket 4 is sleeved on the outside of the clamping ring 13. During the process, the gasket 4 elastically expands outward until the clamping ring 13 is embedded in the clamping groove 41. The gasket 4 is clamped on the outside of the clamping ring 13. By utilizing the limiting effect of the inner wall of the clamping groove 41 on the outer wall of the clamping ring 13, the gasket 4 can be quickly and stably fixed on the valve body 1 for use. When the utility model is assembled into the pipeline for use, the valve body 1 is inserted into the No. 1 water pipe 7 from the left end of the No. 1 water pipe 7 until the back of the gasket 4 is against the pipe mouth of the No. 1 water pipe 7, and then the pipe mouth of the right end of the No. 2 water pipe 6 is threadedly connected and fixed to the left end of the No. 1 water pipe 7 until the shrinkage part 61 in the No. 2 water pipe 6 is pressed against the front of the gasket 4, wherein the right end of the No. 2 water pipe 6 is provided with an internal thread, and the left end of the No. 1 water pipe 7 is provided with an external thread, and the setting of the gasket 4 can perform bidirectional sealing with the No. 1 water pipe 7 and the No. 2 water pipe 6 respectively, thereby reducing the risk of leakage between the No. 2 water pipe 6 and the No. 1 water pipe 7, and at the same time can enhance the contact area between the utility model and the No. 1 water pipe 7, and improve the connection stability between the utility model and the No. 1 water pipe 7.

[0034] In addition, if attached Figure 6 , Figure 7, Figure 8 and Fig.10 As shown, the gasket is provided with a detachable clamping accessory 5, which is used to press the diaphragm 3 onto the valve plate 2. Specifically, the clamping accessory 5 includes a mounting plate 51 and a clamping portion 52. The mounting plate 51 is detachably placed between the clamping ring 13 and the gasket 4. The center of the bottom surface of the mounting plate 51 is provided with a downwardly protruding clamping portion 52. The mounting plate 51 is penetrated by a plurality of water-permeable holes 53, wherein the diameter of the mounting plate 51 is consistent with the outer diameter of the clamping ring 13. After the diaphragm 3 is assembled on the valve plate 2, the mounting plate 51 is first covered on the clamping ring 13, at which time the clamping part 52 presses against the diaphragm 3, and then the gasket 4 is put on the outside of the clamping ring 13 and the mounting plate 51, so that the clamping ring 13 and the mounting plate 51 are both embedded in the card slot 41, and the gasket 4 is used to enhance the connection stability between the clamping fitting 5 and the valve body 1, reduce the risk of the clamping fitting 5 falling off, so that the clamping part 52 can always press against the diaphragm 3 to prevent the diaphragm 3 from falling off, and then when the utility model is assembled into the pipeline for use, the clamping fitting 5, the gasket 4 and the valve body 1 are fixed and used through the No. 2 water pipe 6 and the No. 1 water pipe 7, wherein the water permeable hole 53 provided on the mounting plate 51 can ensure the smooth flow of the fluid in the valve body 1. Further, the mounting plate 51 and the clamping part 52 are integrally formed by injection molding, and can be made of synthetic plastic, which has high hardness and is not easy to age or break.

[0035] In summary, when the utility model is in use, when the fluid flows from the water inlet 11 to the water outlet 12, the diaphragm 3 bends toward the water outlet 12 under the action of the pressure difference, so that the diaphragm 3 is partially away from the water hole 22 and the inner wall of the valve body 1. At this time, the valve body 1 is in a conducting state, and the fluid can smoothly flow from the water inlet 11 to the water outlet 12; when the fluid flows from the water outlet 12 to the water inlet 11, the diaphragm 3 bends toward the water inlet 11 under the action of the pressure difference, so that the diaphragm 3 is close to the valve plate 2 or the inner wall of the valve body 1. At this time, the valve body 1 is in a cut-off state, and the fluid cannot flow from the water outlet 12 to the water inlet 11, thereby achieving the purpose of unidirectional flow, and at the same time, the clamping part 52 of the clamping fitting 5 is pressed against the diaphragm 3 to prevent the diaphragm 3 from falling off. The utility model has a simple structure, convenient installation, strong practicality, reliable operation, low manufacturing cost, and can improve the check sensitivity for different pressure pipelines by replacing diaphragms 3 of different thicknesses.

[0036] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A diaphragm type one-way valve, characterized in that: The one-way valve includes: A valve body, wherein two ends of the valve body are respectively a water inlet and a water outlet, and the valve body at the water outlet protrudes outwards to form a clamping ring; A valve plate, wherein the valve plate is arranged in the valve body, the side wall of the valve plate is connected to the inner wall of the valve body, the valve plate is penetrated by a mounting hole and a plurality of water holes, the mounting hole is arranged in the center of the valve plate, the mounting hole and the water holes are independent of each other, and the water holes are arranged outside the mounting hole; A diaphragm, wherein a mounting rod is provided on the bottom surface of the diaphragm, an inwardly recessed mounting groove is provided on the outer surface of the mounting rod, and both the diaphragm and the mounting rod are made of elastic material; A gasket, which is detachably arranged on the clamping ring and is made of elastic material; A clamping accessory, the clamping accessory comprising a mounting plate and a clamping portion, the mounting plate being detachably disposed between the clamping ring and the gasket, a clamping portion protruding downwardly being disposed at the center of the bottom surface of the mounting plate, and a plurality of water-permeable holes penetrating the mounting plate; Wherein, the diaphragm is detachably arranged on an end surface of the valve plate close to the water outlet. When the diaphragm is assembled to the valve plate, the mounting rod is inserted into the mounting hole, and the valve plate around the mounting hole is placed in the mounting groove. The diaphragm is used to control the on and off of the valve body. When the mounting plate is placed between the retaining ring and the gasket, the clamping portion presses against the diaphragm.

2. A diaphragm type one-way valve according to claim 1, characterized in that: The diaphragm and the mounting rod are integrally formed.

3. A diaphragm type one-way valve according to claim 2, characterized in that: The diaphragm is made of silica gel material.

4. A diaphragm type one-way valve according to claim 1, characterized in that: The mounting plate and the pressing portion are integrally formed.

5. A diaphragm type one-way valve according to claim 1, characterized in that: The gasket is made of rubber material.

6. A diaphragm type one-way valve according to claim 1, characterized in that: An inwardly recessed groove is provided on the inner ring wall of the gasket. When the gasket is assembled onto the clamping ring, the gasket is sleeved on the outer side of the clamping ring and the mounting plate, and the clamping ring and the mounting plate are both embedded in the groove.

7. A diaphragm type one-way valve according to claim 1, characterized in that: The valve body and the valve plate are integrally formed.

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