Diaphragm type one-way valve

Abstract

The utility model discloses a diaphragm type one-way valve which comprises a first shell, a second shell, a sealing rubber head and an elastic piece. A sealed cavity is defined between the first shell and the second shell, the first shell and the second shell are provided with a first connector and a second connector respectively, the first connector and the second connector are both communicated with the cavity, the elastic piece is arranged in the cavity, and the other end of the elastic piece abuts against the sealing rubber head; the sealing rubber head comprises an abutting part, a diaphragm part and a fixing part; the sealing rubber head is extruded through the elastic piece, liquid in the first connector ejects the sealing rubber head open due to the fact that the liquid pressure is larger than the pressure of the elastic piece, the liquid enters the cavity and then circulates from the second connector, and one-way circulation is achieved. In addition, the sealing rubber head is fixed between the first shell and the second shell through the fixing part, and the abutting part is connected through the diaphragm, so that the abutting part always corresponds to the position of the first connector, and liquid leakage caused by deviation of the abutting part is avoided.

Description

Technical Field

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

[0002] Most of the existing one-way valve rubber heads are made into a single rubber head with an arc surface, which is fixed together with a compression spring for use. The guidance of the rubber head of this one-way valve is very poor. After repeated use, the rubber head and the valve body will be offset and out of center, causing the seal to fail and leak at both ends of the one-way valve. Moreover, when the water pressure is overloaded, the rubber head will be rushed to the water outlet. Since there is no limit and protection structure, the compression spring is very easy to move, which will cause the rubber head to deviate and cause the seal to fail. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a diaphragm one-way valve to solve the above problems.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a diaphragm type one-way valve, comprising a first shell, a second shell, a sealing rubber head and an elastic member; the first shell is sleeved on the second shell, and a closed cavity is formed between the first shell and the second shell, and a first joint and a second joint are respectively provided on the first shell and the second shell, and the first joint and the second joint are both connected with the cavity, the sealing rubber head is arranged in the cavity, and the elastic member is arranged in the cavity, one end of the elastic member abuts against the inside of the second rubber head, and the other end abuts against the sealing rubber head; the sealing rubber head includes an abutting portion abutting against the first joint, a diaphragm portion extending outward from the side of the abutting portion, and also includes a fixing portion clamped and fixed between the first shell and the second shell and fixedly connected to the diaphragm portion; a plurality of water holes are opened on the diaphragm portion.

[0005] Preferably, the fixing portion of the sealing rubber head extends toward the first shell and the second shell to form a limiting edge, and the first shell and the second shell are provided with limiting grooves corresponding to the limiting edges.

[0006] Preferably, a side of the abutment portion of the sealing rubber head close to the elastic member extends toward the inside of the elastic member to form a limiting boss.

[0007] Preferably, one end of the second joint close to the cavity extends toward the inside of the elastic member to form a limiting seat.

[0008] Preferably, the outer surface of the second shell is provided with a plurality of tenons, and the first shell is provided with buckles corresponding to the tenons; the first shell is detachably connected to the second shell by engaging the buckles with the tenons.

[0009] Preferably, the elastic member is a compression spring.

[0010] Preferably, a flow direction mark is provided on the first shell.

[0011] The technical effects of the utility model are mainly reflected in: the sealing rubber head is squeezed by the elastic member so that the abutting part of the sealing rubber head abuts against the first joint, so that the liquid entering the cavity from the second joint cannot flow out from the first joint; and the liquid in the first joint pushes open the sealing rubber head and enters the cavity because the liquid pressure is greater than the pressure of the elastic member, and then flows from the second joint to achieve one-way flow; the sealing rubber head is also fixed between the first shell and the second shell by the fixing part, and the abutting part is connected by the diaphragm, so that the abutting part always corresponds to the position of the first joint, avoiding the abutting part from shifting and causing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram of the utility model;

[0013] Figure 2 It is an exploded view of the utility model;

[0014] Figure 3 for Figure 1 A top view of

[0015] Figure 4 for Figure 3 Section view along line AA.

[0016] The figures are marked as: 1-first shell, 11-first joint, 12-limiting groove, 13-buckle, 2-second shell, 21-second joint, 22-limiting seat, 23-tenon, 3-sealing rubber head, 31-abutting part, 32-diaphragm part, 33-fixing part, 34-water hole, 35-limiting edge, 36-limiting boss, 4-elastic part, 5-cavity, 6-flow direction mark. DETAILED DESCRIPTION

[0017] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0018] In this embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right", "left end", "above", "back", "middle", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In addition, in this specific embodiment, if the connection or fixing method between components is not specifically described, the connection or fixing method can be through bolt fixing or pin fixing, or pin shaft connection and the like commonly used in the prior art, and therefore, it will not be described in detail in this embodiment.

[0020] The utility model provides a diaphragm type one-way valve, such as Figure 1-4 As shown, it includes a first shell 1, a second shell 2, a sealing rubber head 3 and an elastic member 4; the first shell 1 is sleeved on the second shell 2, and a closed cavity 5 is formed between the first shell 1 and the second shell 2, and a first joint 11 and a second joint 21 are respectively provided on the first shell 1 and the second shell 2, and the first joint 11 and the second joint 21 are both connected to the cavity 5, the sealing rubber head 3 is arranged in the cavity 5, and the elastic member 4 is arranged in the cavity 5, one end of the elastic member abuts against the inside of the second rubber head, and the other end abuts against the sealing rubber head 3; the sealing rubber head 3 includes an abutting portion 31 abutting against the first joint 11, a diaphragm portion 32 extending outward from the side of the abutting portion 31, and also includes a diaphragm portion 32 clamped and fixed to the first shell 1 and the second shell 2, and is fixedly connected to the diaphragm part 32; a plurality of water holes 34 are opened on the diaphragm part 32, and the sealing rubber head 3 is squeezed by the elastic member 4 so that the abutting portion 31 of the sealing rubber head 3 abuts against the first joint 11, so that the liquid entering the cavity 5 from the second joint 21 cannot flow out from the first joint 11; and the liquid in the first joint 11 pushes the sealing rubber head 3 open and enters the cavity 5 because the liquid pressure is greater than the pressure of the elastic member 4, and then flows from the second joint 21, so as to realize one-way flow; the sealing rubber head 3 is also fixed between the first shell 1 and the second shell 2 by the fixing portion 33, and the abutting portion 31 is connected by the diaphragm, so that the abutting portion 31 always corresponds to the position of the first joint 11, so as to avoid the abutting portion 31 from shifting and causing leakage.

[0021] Preferably, in this embodiment, the elastic member 4 is a compression spring, and the compression spring is always in a compressed state.

[0022] Preferably, the fixing portion 33 of the sealing rubber head 3 extends toward the first shell 1 and the second shell 2 to form a limiting edge 35, and the first shell 1 and the second shell 2 are provided with a limiting groove 12 corresponding to the limiting edge 35. The limiting edge 35 is installed in the limiting groove 12, so that the sealing rubber head 3 is fixed more stably and the sealing rubber head 3 is prevented from being offset.

[0023] Preferably, the abutment portion 31 of the sealing rubber head 3 extends toward the inside of the elastic member 4 on one side close to the elastic member 4 to form a limiting boss 36, which is used for the elastic member 4 to always generate pressure toward the sealing rubber head 3 to prevent the elastic member 4 and the sealing rubber head 3 from being misaligned and separated.

[0024] Preferably, one end of the second joint 21 close to the cavity 5 extends toward the inside of the elastic member 4 to form a limit seat 22, which is used to prevent one end of the elastic member 4 from shifting, thereby ensuring that the elastic member 4 always exerts pressure on the sealing rubber head 3, so that the one-way valve of the present application always maintains one-way conduction.

[0025] Preferably, the outer surface of the second shell 2 is provided with a plurality of tenons 23, and the first shell 1 is provided with buckles 13 corresponding to the tenons; the first shell 1 is detachably connected with the second shell 2 by engaging the buckles 13 with the tenons 23, and the engaging manner of the tenons 23 and the buckles 13 makes the installation of the first shell 1 and the second shell 2 more convenient, and the buckles 13 and the tenons 23 can also be separated to realize the inspection of the inside of the one-way valve.

[0026] Preferably, a flow direction mark 6 is provided on the first shell 1 to facilitate the user to determine the conduction direction during use.

[0027] The technical effects of the utility model are mainly reflected in: the sealing rubber head is squeezed by the elastic member so that the abutting part of the sealing rubber head abuts against the first joint, so that the liquid entering the cavity from the second joint cannot flow out from the first joint; and the liquid in the first joint pushes open the sealing rubber head and enters the cavity because the liquid pressure is greater than the pressure of the elastic member, and then flows from the second joint to achieve one-way flow; the sealing rubber head is also fixed between the first shell and the second shell by the fixing part, and the abutting part is connected by the diaphragm, so that the abutting part always corresponds to the position of the first joint, avoiding the abutting part from shifting and causing leakage.

[0028] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A diaphragm check valve, characterized in that: It includes a first shell, a second shell, a sealing rubber head and an elastic member; the first shell is sleeved on the second shell, and a closed cavity is formed between the first shell and the second shell, the first shell and the second shell are respectively provided with a first joint and a second joint, both of which are connected with the cavity, the sealing rubber head is arranged in the cavity, the elastic member is arranged in the cavity, one end of the elastic member abuts against the inside of the second rubber head, and the other end abuts against the sealing rubber head; the sealing rubber head includes an abutting portion abutting against the first joint, a diaphragm portion extending outward from the side of the abutting portion, and also includes a fixing portion clamped and fixed between the first shell and the second shell and fixedly connected to the diaphragm portion; a plurality of water holes are opened on the diaphragm portion.

2. A diaphragm check valve according to claim 1, characterized in that: The fixing portion of the sealing rubber head extends toward the first shell and the second shell to form a limiting edge, and the first shell and the second shell are provided with limiting grooves corresponding to the limiting edges.

3. A diaphragm check valve according to claim 2, characterized in that: The elastic member is a compression spring.

4. A diaphragm check valve as claimed in claim 3, characterized in that: A side of the abutment portion of the sealing rubber head close to the elastic member extends toward the inside of the elastic member to form a limiting boss.

5. A diaphragm type one-way valve as claimed in claim 4, characterized in that: One end of the second joint close to the cavity extends toward the inside of the elastic member to form a limiting seat.

6. A diaphragm check valve according to claim 1, characterized in that: The outer surface of the second shell is provided with a plurality of tenons, and the first shell is provided with buckles corresponding to the tenons; the first shell is detachably connected to the second shell by engaging the buckles with the tenons.

7. A diaphragm check valve according to claim 1, characterized in that: The first shell is provided with a flow direction mark.

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