A diaphragm check valve

Abstract

The utility model relates to a diaphragm check valve belongs to valve technical field. Including the valve seat of bottommost cylindrical structure, the diaphragm stop piece of cover -like structure is welded and fixed above the valve seat, the diaphragm of round sheet shape is still movably arranged between the valve seat and diaphragm stop piece, still be equipped with a tubular sleeve outside diaphragm stop piece, diaphragm stop piece includes annular one stop piece base, four sheet structures one stop piece stand are evenly set up along the vertical direction even vertical upward on one stop piece base upper surface, two two opposite two stop piece stands are connected fixed through the cross sheet structure one stop piece cover top, even form a plurality of one stop piece fluid holes between one stop piece stand and one stop piece cover top.

Description

Technical Field

[0001] This utility model relates to a diaphragm check valve, belonging to the field of valve technology. Background Technology

[0002] Currently, diaphragm check valves are widely used in refrigeration systems. Existing diaphragm stop structures for single-piece diaphragm valves include... Figure 8 As shown, it is relatively large. When in use, the refrigerant needs to bypass the diaphragm after entering from the inlet before continuing to flow to the outlet. This will hinder the efficiency of refrigerant flow and transmission, affecting the cooling effect.

[0003] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a diaphragm check valve that has greater industrial application value. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a diaphragm check valve.

[0005] This utility model discloses a diaphragm one-way valve, including a valve seat with a cylindrical structure at the bottom, a diaphragm stop with a cover structure welded and fixed above the valve seat, a circular diaphragm movably disposed between the valve seat and the diaphragm stop, and a tubular sleeve disposed outside the diaphragm stop. The diaphragm stop includes an annular first stop base, and four plate-shaped first stop columns are uniformly and vertically arranged on the upper surface of the first stop base. Two opposite first stop columns are connected and fixed by a cross-shaped first stop cover. Multiple first stop fluid holes are uniformly formed between the first stop columns and the first stop cover.

[0006] Furthermore, the diaphragm stop can also be provided with an annular second stop base. Six sheet-like second stop columns are uniformly and vertically arranged on the upper surface of the second stop base. An annular sheet-like second stop cover ring is fixedly connected to the top of the multiple second stop columns. Multiple semi-circular protruding diaphragm stop blocks are uniformly arranged on the inner side of the second stop cover ring for limiting the diaphragm. Multiple second stop fluid holes are uniformly formed between the second stop columns and the second stop cover ring.

[0007] Furthermore, the valve seat is provided with three steps around its perimeter, with the outermost step being a circular sleeve mounting platform with the largest radius, used for mounting the sleeve. The sleeve and the sleeve mounting platform are connected by an interference fit.

[0008] Furthermore, a diaphragm stop mounting platform is provided on the second step above the sleeve mounting platform for installing the diaphragm stop, with a gap between the diaphragm stop and the sleeve on its outer side.

[0009] Furthermore, the third step above the diaphragm stop mounting platform is an annular diaphragm sealing surface, the inner diameter of which is smaller than the diameter of the diaphragm.

[0010] Furthermore, a copper tube is also fitted onto the top of the sleeve, and the top of the copper tube is the refrigerant outlet.

[0011] By means of the above-described solution, the present invention has at least the following advantages:

[0012] The diaphragm stop used in this invention features a small-volume, multi-channel design. When the valve is opened, the diaphragm is located at the top of the stop, thus creating a large-diameter flow channel in the middle. The fluid passes through this channel and directly enters the sleeve, unlike traditional stop devices where the refrigerant needs to enter from the inlet and then bypass the diaphragm before continuing to flow towards the outlet. This avoids the problem of the diaphragm obstructing the refrigerant flow and affecting the cooling effect, and thus has broad application prospects.

[0013] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a cross-sectional view of the diaphragm check valve of this utility model in the closed state;

[0016] Figure 2 This is a cross-sectional view of the diaphragm check valve of this utility model in the open state;

[0017] Figure 3 This is a cross-sectional view of the valve seat in the diaphragm check valve of this utility model;

[0018] Figure 4 This is a top view of the diaphragm stop in Embodiment 1 of the diaphragm check valve of this utility model;

[0019] Figure 5 This is a cross-sectional view of the diaphragm stop in Embodiment 1 of the diaphragm check valve of this utility model;

[0020] Figure 6This is a top view of the diaphragm stop in Embodiment 2 of the diaphragm check valve of this utility model;

[0021] Figure 7 This is a cross-sectional view of the diaphragm stop in Embodiment 2 of the diaphragm check valve of this utility model;

[0022] Figure 8 This is a schematic diagram of the diaphragm stop component of a traditional diaphragm check valve.

[0023] In the figure:

[0024] 1. Valve seat; 2. Diaphragm stop; 3. Diaphragm; 4. Sleeve; 5. Copper tube;

[0025] 10. Refrigerant inlet; 20. Refrigerant outlet; 11. Sleeve mounting platform; 12. Diaphragm stop mounting platform; 13. Diaphragm sealing surface;

[0026] 21. Base of No. 1 stop; 22. Post of No. 1 stop; 23. Top of No. 1 stop; 24. Fluid hole of No. 1 stop;

[0027] 21a, base of stop part No. 2; 22a, column of stop part No. 2; 23a, top ring of stop part No. 2; 24a, diaphragm stop block; 25a, fluid hole of stop part No. 2. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] Example 1

[0030] See Figures 1 to 5 A preferred embodiment of the present invention provides a diaphragm check valve, comprising a valve seat 1 with a cylindrical structure at the bottom, a diaphragm stop 2 with a cover structure welded and fixed above the valve seat, a circular diaphragm 3 movably disposed between the valve seat 1 and the diaphragm stop 2, and a tubular sleeve 4 disposed outside the diaphragm stop 2. The diaphragm stop 2 includes an annular first stop base 21, and four plate-shaped first stop posts 22 are uniformly and vertically arranged on the upper surface of the first stop base 21. Two opposite first stop posts 22 are connected and fixed by a cross-shaped first stop cover 23 for limiting the diaphragm 3. A plurality of first stop fluid holes 24 are uniformly formed between the first stop posts 22 and the first stop cover 23 for smooth passage of refrigerant fluid.

[0031] The bottom of the valve seat 1 is the refrigerant inlet 10.

[0032] The valve seat 1 is provided with three steps around its periphery, the outermost of which is a circular sleeve mounting platform 11 with the largest radius, used to fit and install the sleeve 4. The sleeve 4 and the sleeve mounting platform 11 are connected by an interference fit.

[0033] A diaphragm stop mounting platform 12 is provided on the second step above the sleeve mounting platform 11 for installing the diaphragm stop 2. There is a gap between the diaphragm stop 2 and the sleeve 4 on its outer side to facilitate the direct, efficient and smooth passage of refrigerant fluid.

[0034] The third step above the diaphragm stop mounting platform 12 is an annular diaphragm sealing surface 13. The inner diameter of the diaphragm sealing surface 13 is smaller than the diameter of the diaphragm 3. When no refrigerant passes through, the diaphragm 3 will cover the diaphragm sealing surface 13 due to gravity, keeping the valve closed.

[0035] The top end of the sleeve 4 is also fitted with a copper pipe 5, the top end of which is a refrigerant outlet 20 for refrigerant to flow out.

[0036] Example 2

[0037] See Figures 1 to 3 A preferred embodiment of the present invention describes a diaphragm check valve, comprising a valve seat 1 with a cylindrical structure at the bottom, a diaphragm stop 2 with a cap-like structure welded and fixed above the valve seat, a circular diaphragm 3 movably disposed between the valve seat 1 and the diaphragm stop 2, and a tubular sleeve 4 disposed outside the diaphragm stop 2. (See also...) Figure 6 and Figure 7 The diaphragm stop 2 can also be in another form, including an annular second stop base 21a. Six sheet-like second stop columns 22a are uniformly and vertically arranged on the upper surface of the second stop base 21a. An annular sheet-like second stop cover ring 23a is fixedly connected to the top of the multiple second stop columns 22a. Multiple semi-circular protruding diaphragm stop blocks 24a are uniformly arranged on the inner side of the second stop cover ring 23a for limiting the diaphragm 3. Multiple second stop fluid holes 25a are uniformly formed between the second stop columns 22a and the second stop cover ring 23a for smooth passage of refrigerant fluid.

[0038] The bottom of the valve seat 1 is the refrigerant inlet 10.

[0039] The valve seat 1 is provided with three steps around its periphery, the outermost of which is a circular sleeve mounting platform 11 with the largest radius, used to fit and install the sleeve 4. The sleeve 4 and the sleeve mounting platform 11 are connected by an interference fit.

[0040] A diaphragm stop mounting platform 12 is provided on the second step above the sleeve mounting platform 11 for installing the diaphragm stop 2. There is a gap between the diaphragm stop 2 and the sleeve 4 on its outer side to facilitate the direct, efficient and smooth passage of refrigerant fluid.

[0041] The third step above the diaphragm stop mounting platform 12 is an annular diaphragm sealing surface 13. The inner diameter of the diaphragm sealing surface 13 is smaller than the diameter of the diaphragm 3. When no refrigerant passes through, the diaphragm 3 will cover the diaphragm sealing surface 13 due to gravity, keeping the valve closed.

[0042] The top end of the sleeve 4 is also fitted with a copper pipe 5, the top end of which is a refrigerant outlet 20 for refrigerant to flow out.

[0043] The working principle of this utility model is as follows:

[0044] In actual use, when no refrigerant fluid is introduced, the diaphragm 3 covers the diaphragm sealing surface 13 due to gravity, keeping the valve closed. When refrigerant fluid is introduced from the refrigerant inlet 10, the refrigerant fluid pushes the diaphragm 3 upward through the flow impact, causing the diaphragm to detach from the diaphragm sealing surface 13. At this time, the refrigerant fluid flows out from the fluid hole 24 of the first stop, and finally flows out through the sleeve 4, copper pipe 5 and refrigerant outlet 20.

[0045] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0046] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0047] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A diaphragm check valve characterized by: The valve seat is located at the bottom of the cylindrical structure, the cover-shaped diaphragm stopper is welded and fixed above the valve seat, the disc-shaped diaphragm is movably arranged between the valve seat and the diaphragm stopper, and a tubular sleeve is arranged outside the diaphragm stopper, the diaphragm stopper comprises a circular annular first stopper base, four sheet-shaped first stopper columns are uniformly and vertically arranged on the upper surface of the first stopper base in the vertical direction, and two stopper columns opposite to each other are connected and fixed by a cross-shaped first stopper cover top, and a plurality of first stopper fluid holes are uniformly formed between the first stopper column and the first stopper cover top.

2. A membrane check valve according to claim 1, characterized in that: The diaphragm stopper can also be provided with a circular annular second stopper base, six sheet-shaped second stopper columns are uniformly and vertically arranged on the upper surface of the second stopper base in the vertical direction, a circular annular sheet-shaped second stopper cover top ring is fixedly connected to the top of the plurality of second stopper columns, a plurality of semicircular protruding diaphragm stop blocks are uniformly arranged on the inner side of the second stopper cover top ring for limiting the diaphragm, and a plurality of second stopper fluid holes are uniformly formed between the second stopper column and the second stopper cover top ring.

3. The membrane check valve of claim 1, wherein: The valve seat is provided with three layers of steps, wherein the outermost is a circular annular sleeve mounting table with the largest radius, used for sleeving and mounting the sleeve, and the sleeve and the sleeve mounting table are connected by interference fit.

4. The membrane check valve of claim 3, wherein: A diaphragm stopper mounting table is arranged on the second layer of steps above the sleeve mounting table, used for mounting the diaphragm stopper, and a space is left between the diaphragm stopper and the sleeve outside the diaphragm stopper.

5. A membrane check valve according to claim 4, wherein: The third layer of steps above the diaphragm stopper mounting table is a circular annular diaphragm sealing surface, and the inner diameter of the diaphragm sealing surface is smaller than the diameter of the diaphragm.

6. The membrane check valve of claim 1, wherein: The top end of the sleeve is also sleeved with a copper pipe, and the top end of the copper pipe is a refrigerant outlet.

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