Sealing gasket of multi-way valve

Abstract

The sealing gasket comprises a first gasket body, a second gasket body and a third gasket body, the second gasket body and the third gasket body are sequentially arranged on the inner side of the first gasket body in the radial direction of the first gasket body, and the inner wall of the first gasket body is provided with a first connecting strip connected with the second gasket body; a second connecting strip is connected between the second gasket and the third gasket; convex ribs are arranged on the upper surfaces of the first gasket and the first connecting strip, and the upper surfaces of the second gasket and the third gasket are planes; the sealing surface with the convex ribs and the sealing surface with the flat upper surface are arranged at the same time, so that close contact with the double valve elements can be formed at the same time, the good sealing effect is achieved, the situation that a traditional sealing surface with the convex ribs or a planar sealing surface is adopted is avoided, and the sealing structure is only suitable for a valve body with a single valve element; the multi-channel water valve product has fewer functions compared with the multi-channel water valve product suitable for the multi-channel water valve, the multi-channel water valve is simple in structure and high in usability, and the practicability of the device is improved.

Description

Technical Field

[0001] The present invention specifically relates to a gasket for a multi-way valve. Background Art

[0002] A multi-way valve is a valve with multiple inlets and outlets, usually used in a pipeline system to control the flow direction and flow rate of fluid between multiple pipelines or devices. It has a wide range of applications in industrial automation, chemical industry, pharmaceutical industry, food processing and other fields.

[0003] In the existing pipeline system, a single spool disk valve is mostly used. The internal leakage seal has only one circle of flow ports, and the seal is a semi-circular ribbed sealing surface or a fan-shaped flat sealing surface. When replacing it with a dual-spool multi-way valve with more functions in the pipeline system, the existing internal leakage seal is not convenient for sealing the dual spool well. Therefore, we propose a gasket for a multi-way valve. Summary of the Invention

[0004] The purpose of the present invention is to provide a gasket for a multi-way valve to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A gasket for a multi-way valve, comprising:

[0006] A first gasket, a second gasket and a third gasket. The second gasket and the third gasket are sequentially arranged inside the first gasket along the radial direction of the first gasket. And the inner wall of the first gasket has a first connecting strip connected to the second gasket, and there is a second connecting strip connecting the second gasket and the third gasket;

[0007] Wherein, the upper surfaces of the first gasket and the first connecting strip both have ribs, and the upper surfaces of the second gasket and the third gasket are flat surfaces.

[0008] Preferably, a plurality of the first connecting strips are arranged along the circumferential direction of the first gasket, and a first flow channel is formed between every two first connecting strips.

[0009] Preferably, a plurality of the second connecting strips are evenly distributed along the inner wall of the second gasket, and there is a second flow channel between every two second connecting strips.

[0010] Preferably, the first gasket, the second gasket, the third gasket and the first connecting strip are of an integrally formed structure.

[0011] Preferably, the lower surface of the first gasket has a chamfer.

[0012] Preferably, the materials of the first gasket, the second gasket and the third gasket are PTFE.

[0013] Preferably, the upper surface of the first gasket has an EPDM layer.

[0014] Preferably, a positioning groove for positioning is provided on the lower surface of the second washer.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] By simultaneously providing a sealing surface with ribs and a sealing surface with a flat upper surface, the present invention can form close contact with the double spool simultaneously, forming a good sealing effect, avoiding the traditional sealing surface with ribs or a flat sealing surface, which is only applicable to the valve body with a single spool, and the multi-way valve product has fewer functions than the multi-way valve product applicable to the present invention. The structure of the present invention is simple, can closely contact the lower surface of the double spool well, realizes a good sealing effect, has strong ease of use, and increases the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a schematic cross-sectional structural diagram of the present invention;

[0019] Figure 3 is a schematic structural diagram of the positioning groove of the present invention;

[0020] Figure 4 is a schematic diagram of the gasket of the present invention installed on a double-spool multi-way valve.

[0021] In the figure: 1, the first washer; 2, the second washer; 3, the third washer; 4, the first connecting strip; 5, the first flow channel; 6, the second flow channel; 7, the positioning groove; 101, the rib. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-4 , the present invention provides a technical solution: a gasket for a multi-way valve, including:

[0024] The first washer 1, the second washer 2 and the third washer 3, the second washer 2 and the third washer 3 are sequentially arranged inside the first washer 1 along the radial direction of the first washer 1, and the inner wall of the first washer 1 has a first connecting strip 4 connected to the second washer 2, and there is a second connecting strip connecting the second washer 2 and the third washer 3;

[0025] Facilitate the formation of multiple flow channels, so as to adapt to a multi-way valve with a double spool.

[0026] Among them, both the upper surfaces of the first washer 1 and the first connecting strip 4 have convex ribs 101, and the upper surfaces of the second washer 2 and the third washer 3 are flat surfaces.

[0027] It is convenient to tightly contact with the outer spool in the double spool through the convex ribs 101 to achieve good contact sealing, which can reduce the wear of a large contact surface. The flat sealing surface contacts with both the inner and outer spools of the double spool simultaneously to achieve good contact area for sealing.

[0028] Preferably, a plurality of first connecting strips 4 are arranged along the circumferential direction of the first washer 1, and a first flow channel 5 is formed between every two first connecting strips 4.

[0029] Facilitate the conduction of one of the spools in the double-spool multi-way valve.

[0030] Preferably, a plurality of second connecting strips are evenly distributed along the inner wall of the second washer 2, and a second flow channel 6 is provided between every two second connecting strips.

[0031] Facilitate the conduction of the other spool in the double-spool multi-way valve.

[0032] Preferably, the first washer 1, the second washer 2, the third washer 3 and the first connecting strip 4 are of an integrally formed structure.

[0033] Facilitate manufacturing and improve the connection strength.

[0034] Preferably, the lower surface of the first washer 1 has a chamfer.

[0035] Facilitate better assembly into the inner side of the double-spool multi-way valve.

[0036] Preferably, the materials of the first washer 1, the second washer 2 and the third washer 3 are PTFE.

[0037] PTFE is polytetrafluoroethylene, which facilitates improving the strength and wear resistance of the gasket.

[0038] Preferably, the upper surface of the first washer 1 has an EPDM layer.

[0039] EPDM is ethylene propylene diene monomer rubber, which facilitates improving the chemical corrosion resistance effect of the gasket and enhancing the stability.

[0040] Preferably, a positioning groove 7 for positioning is provided on the lower surface of the second washer 2.

[0041] Facilitate restricting the rotational movement of the gasket after assembly and improving the stability effect after installation.

[0042] The working principle and usage process of the present invention: As Figure 4As shown, an outer valve core 9 is provided inside the valve body 8, and an inner valve core 10 is assembled at the lower end inside the outer valve core 9. When installing the gasket in the present invention inside the valve body 8, the gasket is placed on the valve seat 11 inside the valve body 8. At this time, the first washer 1 of the gasket contacts the outer valve core 9. Through the rib 101 on the first washer 1, it can be in good contact with the outer valve core 9 tightly to achieve sealing. The upper surfaces of the second washer 2 and the third washer 3 are both flat. At this time, the third washer 3 is in close contact with the arc surface at the lower end of the inner valve core 10 to achieve sealing. At the same time, the second washer 2 contacts the outer valve core 9 and the lower end of the inner valve core 10 to achieve sealing, avoiding the traditional sealing surface that is only a ribbed surface or a flat surface, which cannot be in good contact and cooperation with the outer valve core 9 and the inner valve core 10 with different shapes, resulting in poor sealing effect.

[0043] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gasket for a multi-way valve, characterized in that, Comprising: A first washer (1), a second washer (2) and a third washer (3), the second washer (2) and the third washer (3) are sequentially arranged inside the first washer (1) along the radial direction of the first washer (1), and the inner wall of the first washer (1) has a first connecting strip (4) connected to the second washer (2), and there is a second connecting strip connecting the second washer (2) and the third washer (3); Wherein, the upper surfaces of the first washer (1) and the first connecting strip (4) both have ribs (101), and the upper surfaces of the second washer (2) and the third washer (3) are flat surfaces.

2. The gasket of a multi-way valve according to claim 1, characterized in that: A plurality of the first connecting strips (4) are arranged along the circumferential direction of the first washer (1), and a first flow channel (5) is formed between every two first connecting strips (4).

3. The gasket of a multi-way valve according to claim 1, characterized in that: A plurality of the second connecting strips are uniformly distributed along the inner wall of the second washer (2), and there is a second flow channel (6) between every two second connecting strips.

4. The gasket of a multi-way valve according to claim 1, characterized in that: The first washer (1), the second washer (2), the third washer (3) and the first connecting strip (4) are of an integrally formed structure.

5. The gasket of a multi-way valve according to claim 1, characterized in that: The lower surface of the first washer (1) has a chamfer.

6. The gasket of a multi-way valve according to claim 1, characterized in that: The materials of the first washer (1), the second washer (2) and the third washer (3) are PTFE.

7. The gasket of a multi-way valve according to claim 6, characterized in that: The upper surface of the first washer (1) has an EPDM layer.

8. The gasket of a multi-way valve according to claim 1, characterized in that: The lower surface of the second washer (2) is provided with a positioning groove (7) for positioning.

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