Normally-closed diaphragm one-way valve

Abstract

The utility model discloses a normally closed diaphragm one-way valve, which is provided with a valve cavity, a liquid inlet is formed at one end of the valve cavity, a liquid outlet is formed at the other end of the valve cavity, and a diaphragm valve body for isolating the liquid inlet and the liquid outlet is arranged in the valve cavity. The diaphragm valve body is an elastic soft rubber body and is provided with a cushion portion blocking the liquid inlet and a supporting portion abutting against the cushion portion to form the cavity wall of the liquid outlet, and the liquid outlet is formed in the position staggered from the diaphragm valve body. According to the normally-closed one-way valve, the liquid inlet is plugged by the cushion part of the diaphragm valve body, and the plugging force of the cushion part is supported by the supporting part, so that the larger switching-off force required by the normally-closed one-way valve can be easily realized through the elastic deformation degree of the supporting part; and due to the larger aperture of the liquid inlet, the normally-closed one-way valve can easily obtain larger flow. Therefore, by the adoption of the normally-closed one-way valve, the normally-closed one-way valve can obtain large turn-off force, and meanwhile it can be guaranteed that large flow is obtained, so that the normally-closed one-way valve is suitable for application scenes of high-viscosity fluid.

Description

Technical Field

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

[0002] The normally closed check valve is a commonly used component in liquid pump products to control the one-way flow of liquid. For example, a squeeze bottle or a squeeze pump can pump liquid by opening the normally closed check valve through the opening pressure provided by squeezing the liquid, while the normally closed check valve automatically closes to cut off the flow of liquid under normal conditions. At present, the valve body of the normally closed check valve is usually a diaphragm valve body. The diaphragm valve body is made of elastic soft colloid material. The diaphragm valve body is used to separate the liquid inlet and the liquid outlet in the valve cavity of the normally closed check valve. The diaphragm valve body has a straight, trident or cross slit. The opening pressure generated by squeezing the liquid forces the diaphragm valve body to deform and open the slit, and the liquid can flow out from the slit opening. After the squeezing stops, the diaphragm valve body elastically recovers, the slit opening closes and closes, and the liquid flow is cut off.

[0003] In some cases, such as pumping high-viscosity fluids, this normally closed check valve is often required to have a higher shutoff force and a larger flow rate. However, this diaphragm valve body with a slit opening has a dilemma in terms of the shutoff force and flow rate of the normally closed check valve. The shutoff force is provided by the elastic recovery force of the cut piece itself. The longer the slit, the smaller the shutoff force, but the longer the slit, the greater the flow rate. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a normally closed one-way valve with higher shut-off force and larger flow rate.

[0005] The technical solution adopted to solve the above technical problems is: a normally closed diaphragm one-way valve, which has a valve cavity, one end of the valve cavity forms a liquid inlet, and the other end forms a liquid outlet, and a diaphragm valve body is installed in the valve cavity to isolate the liquid inlet and the liquid outlet, characterized in that: the diaphragm valve body is an elastic soft colloid, has a pad portion for sealing the liquid inlet and a support portion for abutting against the wall of the liquid outlet cavity, and the liquid outlet is arranged at a staggered position with respect to the diaphragm valve body.

[0006] On the basis of the above, the supporting portion of the diaphragm valve body is configured to be annular with a trumpet-shaped expanded cross section.

[0007] On the basis of the above, a protruding positioning column is formed in the center of the cushion portion of the diaphragm valve body, and a positioning hole for accommodating and inserting the positioning column is opened in the cavity wall forming the liquid inlet.

[0008] On the basis of the above, the valve cavity is formed by a liquid inlet shell forming a liquid inlet and a liquid outlet shell forming a liquid outlet.

[0009] The beneficial effects brought by the use of the utility model are as follows: since the shutoff of the normally closed one-way valve of the utility model relies on the gasket of the diaphragm valve body to block the liquid inlet, and the sealing force of the gasket relies on the support of the support, the larger shutoff force required by the normally closed one-way valve can be easily achieved through the elastic deformation degree of the support; and the larger aperture of the liquid inlet allows the normally closed one-way valve to easily obtain a larger flow rate. Therefore, the use of the utility model can enable the normally closed one-way valve to obtain a larger shutoff force while ensuring a larger flow rate to adapt to the application scenario of high-viscosity fluids. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the normally closed diaphragm one-way valve of the utility model. DETAILED DESCRIPTION

[0011] like Figure 1 As shown, a normally closed diaphragm one-way valve has a valve cavity 1, one end of the valve cavity 1 forms a liquid inlet 1.1, and the other end forms a liquid outlet 1.2. A diaphragm valve body 2 is installed in the valve cavity 1 to isolate the liquid inlet 1.1 and the liquid outlet 1.2. In the utility model, the diaphragm valve body 2 is an elastic soft colloid, and has a cushion part 2.1 for blocking the liquid inlet 1.1 and a support part 2.2 for abutting against the cavity wall of the liquid outlet 1.2. The liquid outlet 1.2 is arranged at a position staggered from the diaphragm valve body 2.

[0012] The support portion 2.2 of the diaphragm valve body 2 can provide sufficient elastic support force for the cushion portion 2.1, keep the cushion portion 2.1 close to the cavity wall with the liquid inlet 1.1, block the liquid inlet 1.1, and cut off the fluid from entering the valve cavity 1 from the liquid inlet 1.1. For high-viscosity fluids, due to the sufficient elastic support force provided by the support portion 2.2, the diaphragm valve body 2 can obtain a higher shut-off force and cut off the flow of high-viscosity fluids. When the container is squeezed, the fluid entering from the liquid inlet 1.1 pushes the diaphragm valve body 2 to deform and open the liquid inlet 1.1, and the fluid can enter the valve cavity 1 and flow out from the liquid outlet 1.2.

[0013] In this embodiment, the support portion 2.2 of the diaphragm valve body 2 is designed to be annular with a trumpet-shaped expanded cross section, so as to ensure that the diaphragm valve body 2 can be reliably deformed and restored.

[0014] In order to prevent the diaphragm valve body 2 from being displaced when squeezed, a protruding positioning column 2.3 is formed in the center of the cushion portion 2.1 of the diaphragm valve body 2, and a positioning hole 1.3 for receiving and inserting the positioning column 2.3 is formed in the cavity wall forming the liquid inlet 1.1. In this way, when the diaphragm valve body 2 is squeezed, the positioning column 2.3 slidably plugged into the positioning hole 1.3 can effectively prevent the diaphragm valve body 2 from being displaced.

[0015] Generally, the valve chamber 1 is usually formed by the liquid inlet housing 3 forming the liquid inlet 1.1 and the liquid outlet housing 4 forming the liquid outlet 1.2. Of course, the liquid inlet housing 3 and the liquid outlet housing 4 need conventional sealing and fastening for docking.

Claims

1. A normally closed diaphragm one-way valve, the one-way valve having a valve cavity, one end of the valve cavity forming a liquid inlet, the other end forming a liquid outlet, a diaphragm valve body is installed in the valve cavity to isolate the liquid inlet and the liquid outlet, characterized in that: The diaphragm valve body is an elastic soft colloid, having a cushion portion for blocking a liquid inlet and a support portion for abutting against a liquid outlet cavity wall, and the liquid outlet is arranged at a position staggered from the diaphragm valve body.

2. The normally closed diaphragm check valve according to claim 1, characterized in that: The supporting portion of the diaphragm valve body is configured to be annular with a trumpet-shaped expanded cross section.

3. The normally closed diaphragm check valve according to claim 1, characterized in that: A protruding positioning column is formed in the center of the cushion portion of the diaphragm valve body, and a positioning hole for accommodating and inserting the positioning column is opened on the cavity wall forming the liquid inlet.

4. The normally closed diaphragm one-way valve according to any one of claims 1 to 3, characterized in that: The valve cavity is formed by a liquid inlet shell body forming a liquid inlet and a liquid outlet shell body forming a liquid outlet.

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