Diaphragm type one-way valve

Abstract

This is a diaphragm-type one-way valve (100). The diaphragm-type one-way valve (100) includes a valve body (10), a valve seat (20), and a valve core assembly (30). The valve body (10) has an inlet (111) and an outlet (121), and the valve seat (20) has a valve port (21). The valve core assembly (30) includes a valve seat base (31), a diaphragm (32), and an elastic member (33). The valve seat base (31) is provided within the valve body (10) and connected to the valve seat (20). The diaphragm (32) is housed within the valve seat base (31) and in contact with the elastic member (33), thereby controlling the opening and closing of the valve port (21) and the communication or blockage between the inlet (111) and the outlet (121) in cooperation with the medium in the valve port (21) and the elastic member (33). A flow hole (311) is provided in the valve seat base (31), and the valve opening (21) can communicate with the outlet (121) via the flow hole (311) and the media passage (13).

Description

Technical Field

[0001] (Related Application) This application claims the priority of a Chinese patent application with the application number 202310651526.5 and the title "Diaphragm Type One-Way Valve", which was filed on June 2, 2023, and the full text thereof is incorporated herein by reference.

[0002] This application relates to the technical field of valves, and in particular, to diaphragm type one-way valves.

Background Art

[0003] Diaphragm type one-way valves are widely used in cooling systems to restrict the flow direction of the refrigerant medium. Current diaphragm type one-way valves usually have a magnetic member provided in the valve port, and the diaphragm is adsorbed by the magnetic member to seal the valve port. However, when a magnetic member is provided in the valve port, the flow of the refrigerant medium is obstructed, the refrigerant medium introduced into the valve port is diverted by the magnetic member, the flow path of the refrigerant medium is blocked, and the flow capacity of the refrigerant medium is reduced.

Summary of the Invention

[0004] Based on this, it is necessary to provide a diaphragm type one-way valve that can improve the flow capacity of the medium.

[0005] To solve the above technical problems, this application provides the following technical solutions. A diaphragm-type one-way valve includes a valve body having an inlet and an outlet, a valve seat attached to the valve body having a valve port for connecting the inlet and the outlet, a valve seat base, a diaphragm, and an elastic member, wherein the valve seat base is provided within the valve body and connected to the valve seat, and the diaphragm is housed within the valve seat base and in contact with the elastic member, thereby controlling the opening and closing of the valve port and the communication or blockage between the inlet and the outlet under the cooperative action of the medium in the valve port and the elastic member. A medium passage is formed between the valve seat base and the inner circumferential wall of the valve body, and at least one flow hole is provided in the valve seat base, and the valve port can communicate with the outlet via the flow hole and the medium passage.

[0006] In one embodiment, there are multiple flow holes, and these multiple flow holes are arranged at intervals along the circumferential direction of the valve seat base.

[0007] In one embodiment, the sum of the areas of the multiple flow holes is greater than or equal to the minimum flow area of ​​the valve opening, and / or the passage area of ​​the media passage is greater than or equal to the minimum flow area of ​​the valve opening.

[0008] In one embodiment, the valve seat base is provided with a restricting portion that is located on one side of the flow hole away from the valve seat and can contact the diaphragm, so as to restrict the movement of the diaphragm away from the valve seat, or the valve seat base is provided with a contact surface that is located on one side of the flow hole away from the valve seat and can contact the diaphragm, so as to restrict the movement of the diaphragm away from the valve seat.

[0009] In one embodiment, a retaining base is further formed on the valve seat base, and one end of the elastic member away from the diaphragm abuts against the retaining base, and as the diaphragm moves away from the valve seat, the elastic member is compressed and elastically deformed.

[0010] In one embodiment, the elastic member is mounted so as to be pre-compressed between the diaphragm and the retaining base.

[0011] In one embodiment, the elastic member is provided as a conical spring.

[0012] In one embodiment, the valve body includes a first valve body and a second valve body, which are distributed on both sides of the valve seat and welded to the valve seat, with the inlet provided in the first valve body and the outlet provided in the second valve body.

[0013] In one embodiment, a first connecting pipe for connecting to an external pipeline is connected to the first valve body, and a second connecting pipe for connecting to an external pipeline is connected to the second valve body.

[0014] In one embodiment, a boss is formed on the valve seat at the outer circumference of the valve opening, and the diaphragm can be pressed against the boss by an elastic member to close the valve opening, where the thickness of the boss gradually decreases along the direction toward the diaphragm.

[0015] Details of one or more embodiments of this application are described in the accompanying drawings and the following description. Other features, purposes, and advantages of this application will become apparent from the specification, drawings, and claims. [Brief explanation of the drawing]

[0016] Embodiments and / or examples that better illustrate these inventions disclosed herein can be referenced to one or more drawings. Any additional details or examples used to illustrate the drawings should not be considered to limit the scope of any of the disclosed inventions, the embodiments and / or examples described herein, or the best form of these inventions as understood herein.

[0017] [Figure 1] This is a perspective view of a diaphragm-type one-way valve provided by one embodiment of this application. [Figure 2] This is a cross-sectional view of a diaphragm one-way valve in a closed state, provided by one embodiment of this application. [Figure 3] This is a cross-sectional view of a diaphragm one-way valve in a fully open state, provided by one embodiment of this application. [Figure 4] This is a perspective view of a valve seat provided by one embodiment of this application. [Figure 5] This is a cross-sectional view of a valve seat provided by one embodiment of this application. [Figure 6] This is a perspective view of a valve seat base provided by one embodiment of this application. [Figure 7] This is a cross-sectional view of a valve seat base provided according to one embodiment of this application.

[0018] 100 Diaphragm-type one-way valve, 10 Valve body, 11 First valve body, 111 Inlet, 112 First connecting pipe, 12 Second valve body, 121 Outlet, 122 Second connecting pipe, 13 Medium passage, 20 Valve seat, 21 Valve port, 22 Boss, 23 Annular projection, 24 Stepped portion, 30 Valve core assembly, 31 Valve seat base, 311 Flow hole, 312 Restricting groove, 3121 Contact surface, 313 Retaining base, 314 Folded portion, 32 Diaphragm, 33 Elastic member. [Modes for carrying out the invention]

[0019] To make the above-mentioned objectives, features, and advantages of this application clearer and easier to understand, specific embodiments of this application will be described in detail below with reference to the drawings. In the following description, various specific details will be explained in order to make this application easier to understand. However, this application is not limited by the specific embodiments disclosed below, as it can be implemented in many other forms different from those described herein, and those skilled in the art can make similar improvements as long as they do not contradict the content of this application.

[0020] It should be noted that when an assembly is said to be "fixed" or "provided" to another assembly, it may be directly fixed to the other assembly, or there may be intervening assemblies. When an assembly is considered to be "connected" to another assembly, it may be directly connected to the other assembly, or intervening assemblies may exist simultaneously. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only embodiment.

[0021] Furthermore, the terms "first" and "second" are for illustrative purposes only and should not be understood as indicating or implying relative importance or implicitly designating the number of the indicated technical features. Thus, the features limited by "first" and "second" can include at least one of this feature explicitly or implicitly. In the description of this application, "a plurality" means at least two, for example, two, three, etc., unless there is a clear and specific limitation.

[0022] In this application, unless there are particularly clear regulations and limitations, the fact that the first feature is "above" or "below" the second feature may mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, the fact that the first feature is "above", "upward", and "upper side" of the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply that the horizontal height of the first feature is higher than that of the second feature. The fact that the first feature is "below", "downward", and "lower side" of the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply that the horizontal height of the first feature is lower than that of the second feature.

[0023] Unless otherwise defined, all technical and scientific terms used in the specification of this application shall have the same meaning as commonly understood by those skilled in the art of this application. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0024] Referring to FIGS. 2 and 3, a diaphragm type one-way valve 100 provided by an embodiment of this application includes a valve body 10, a valve seat 20, and a valve core assembly 30. An inlet 111 and an outlet 121 are formed in the valve body 10. The valve seat 20 is attached to the valve body 10 and a valve port 21 is formed therein. The valve port 21 is located within the valve body 10 and is used to communicate the inlet 111 and the outlet 121. The valve core assembly 30 includes a valve seat pedestal 31, a diaphragm 32, and an elastic member 33. The valve seat pedestal 31 is provided within the valve body 10 and fixedly connected to the valve seat 20. The diaphragm 32 is accommodated within the valve seat pedestal 31 and abuts against the elastic member 33, so as to control the opening and closing of the valve port 21 by the cooperative action of the medium passing through the valve port 21 and the elastic member 33, and can control the communication or interruption between the inlet 111 and the outlet 121.

[0025] It should be explained that in related technologies, diaphragm-type one-way valves typically have a magnetic member inside the valve opening, and the diaphragm is also magnetic. The valve opening is sealed by using a method in which the magnetic member attracts the diaphragm. However, with this configuration, when a medium is introduced into the valve opening, the magnetic member occupies a portion of the space inside the valve opening, hindering the flow of the medium within the valve opening. Furthermore, this magnetic member may attract some impurities during operation, and if too many impurities are attracted to the magnetic member, when the valve is closed, the impurities interfere with the gap between the diaphragm and the edge of the valve opening, creating a gap and compromising the seal between the diaphragm and the valve opening. On the other hand, the diaphragm-type one-way valve 100 of this application removes the magnetic member and uses an elastic member 33 to press the diaphragm 32 against the edge of the valve opening 21 to seal the valve opening 21, thereby improving the flow of the medium while simultaneously avoiding the problem of the magnetic member attracting impurities and compromising the seal.

[0026] Here, a certain gap exists between the outer wall of the valve seat base 31 and the inner circumferential wall of the valve body 10, allowing the space between the outer wall of the valve seat base 31 and the inner circumferential wall of the valve body 10 to be enclosed and form a media passage 13. At least one flow hole 311 is drilled in the valve seat base 31, and the valve opening 21 can communicate with the outlet 121 via the flow hole 311 and the media passage 13. In this way, when the valve opening 21 is opened, the media introduced from the inlet 111 to the valve opening 21 has a smooth flow passage, and the media can flow sequentially through the flow hole 311 and the media passage 13 to the outlet 121, resulting in a stronger media flow capacity for this diaphragm-type one-way valve 100.

[0027] As shown in Figures 1 to 3, in one embodiment, the valve body 10 includes a first valve body 11 and a second valve body 12, which are arranged separately on both sides of the valve seat 20, and are provided symmetrically along the radial direction of the valve seat 20. An annular projection 23 is formed on the outer circumferential wall of the valve seat 20, and the first valve body 11 and the second valve body 12 are fitted to both ends of the valve seat 20, and the inner circumferential walls of the first valve body 11 and the second valve body 12 are in close contact with the side walls of the valve seat 20 and are abutted against both sides of the annular projection 23 and welded in place, thereby achieving a fixed connection between the first valve body 11 and the second valve body 12 and the valve seat 20. Here, the inlet 111 is drilled at one end of the first valve body 11 away from the valve seat 20, and the outlet 121 is drilled at one end of the second valve body 12 away from the valve seat 20.

[0028] In one embodiment, a first connecting pipe 112 is connected to the inlet 111 of the first valve body 11 and is used to connect to an external pipeline, and a second connecting pipe 122 is connected to the second valve body 12 and is also used to connect to an external pipeline, and both the first connecting pipe 112 and the second connecting pipe 122 are fixed by furnace welding. The radial direction of the first valve body 11 toward the inlet 111 gradually decreases, and the radial direction of the second valve body 12 toward the outlet 121 also gradually decreases, making it easy to attach the first connecting pipe 112 and the second connecting pipe 122 to the inlet 111 and outlet 121 positions, respectively.

[0029] As a point to note, during the assembly process of the diaphragm-type one-way valve 100, the first valve body 11 and the first connecting pipe 112, and the second valve body 12 and the second connecting pipe 122 are usually fixed together by furnace welding first, and then the valve seat 20 and valve core assembly 30 are attached to the first valve body 11 and the second valve body 12, thereby preventing damage to the valve seat 20 and valve core assembly 30 during the furnace welding process.

[0030] As shown in Figures 1 to 5, in one embodiment, a boss 22 is formed on the valve seat 20, the boss 22 has a substantially annular structure and is located on the outer circumference of the valve opening 21, and the surface of one end face of the boss 22 facing the diaphragm 32 is flat, and the diaphragm 32 has a substantially circular sheet-like structure, and in this way, when the diaphragm 32 is pressed against the boss 22 by the elastic member 33, one end face of the boss 22 forms a seal between itself and the diaphragm 32, thereby closing the valve opening 21. Here, the thickness of the boss 22 gradually decreases toward the diaphragm 32, and in this way the contact area between the diaphragm 32 and the end face of the boss 22 can be relatively reduced, which is advantageous for sealing the valve opening 21 by forming a seal after the diaphragm 32 and the boss 22 come into contact. For example, in some embodiments, the diaphragm 32 is supported in contact with the boss 22 of the valve seat 20 under the action of the elastic member 33. For example, the thickness of the end of the boss 22 is small enough to form a line seal between the diaphragm 32 and the boss 22, thereby improving the sealing performance of the valve port 21 when it is closed.

[0031] In one embodiment, the valve seat base 31 is provided with a plurality of flow holes 311, which are arranged at intervals along the circumferential direction of the valve seat base 31. This concretely realizes an embodiment in which the flow holes 311 are provided in the valve seat base 31 and serve to connect the valve opening 21 and the media passage 13. Specifically, the number of flow holes 311 may be two, three, four, or five, and those skilled in the art may selectively set the number and shape of the flow holes 311 according to their actual needs, and no limitations or detailed explanations are provided here.

[0032] As shown in Figures 6 and 7, in this embodiment, there are four flow holes 311, each having a roughly rectangular structure, and the four flow holes 311 are arranged at equal intervals along the circumferential direction of the valve seat base 31. Furthermore, all of the flow holes 311 are located on one side of the valve seat base 31 that is close to the diaphragm 32. In this way, after the valve opening 21 is opened, the medium introduced from the valve opening 21 can quickly flow out through the flow holes 311 and into the medium passage 13.

[0033] Of course, in other embodiments, the number of flow holes 311 may also be set to one.

[0034] In one embodiment, the sum of the areas of the multiple flow holes 311 is greater than or equal to the minimum flow area of ​​the valve opening 21, making it easy for the medium to be discharged from the flow holes 311 in a timely manner after being introduced from the valve opening 21.

[0035] In another embodiment, the passage area of ​​the media passage 13 is greater than or equal to the minimum flow area of ​​the valve opening 21. The passage area of ​​the media passage 13 is the cross-sectional area formed between the valve seat base 31 and the inner wall of the valve body 10 along the radial direction of the valve body 10. This ensures sufficient space for the media to flow through the media passage 13.

[0036] In further embodiments, the sum of the areas of the multiple flow holes 311 is greater than or equal to the minimum flow area of ​​the valve opening 21, and the passage area of ​​the media passage 13 is also greater than or equal to the minimum flow area of ​​the valve opening 21. In this way, after the media is introduced from the valve opening 21, the flow area when it flows through the flow holes 311 and the media passage 13 is equal to or gradually increases, ensuring that the media can be discharged from the flow holes 311 and the media passage 13, thereby improving the media's flow capacity.

[0037] As shown in Figures 2, 3, 6, and 7, in one embodiment, a contact surface 3121 is formed on the valve seat base 31. The contact surface 3121 is located on the inner wall of the valve seat base 31 and is provided on one side away from the valve seat 20 in the flow hole 311. Here, the contact surface 3121 and the diaphragm 32 are provided parallel to each other. In this way, the diaphragm 32 smoothly abuts against the contact surface 3121, restricting the movement of the diaphragm 32 away from the valve seat 20, controlling the degree to which the diaphragm 32 compresses the elastic member 33, limiting the amount of deformation of the elastic member 33, and preventing excessive deformation of the elastic member 33, thereby extending the service life of the elastic member 33.

[0038] In this embodiment, a restricting groove 312 is drilled in the inner wall of the valve seat base 31, the contact surface 3121 is formed at the bottom of the restricting groove 312, and the diaphragm 32 is clearance-fitted to the groove wall of the restricting groove 312, thereby allowing the diaphragm 32 to reciprocate along the axial direction of the valve body 10 within the restricting groove 312.

[0039] This is not limited to this, and in some other embodiments, a restricting portion may be formed on the valve seat base 31. The restricting portion is provided on one side of the flow hole 311 away from the valve seat 20 and is used to contact the diaphragm 32, restricting the movement of the diaphragm 32 in the direction away from the valve seat 20. When the diaphragm 32 moves away from the valve opening 21 under the pressure of the medium in the valve opening 21, the restricting portion provided inside the valve seat base 31 stops the diaphragm 32, restricting the diaphragm 32 to an appropriate open position, thereby allowing smooth flow at the valve opening 21. Here, the specific installation of the restricting portion may be a convex block-shaped structure protruding inward from the valve seat base 31. This convex block-shaped structure and the valve seat base 31 may be integrally molded or assembled as separate parts. There are no special limitations here, and a person skilled in the art can design it appropriately to achieve the function of regulating the position of the diaphragm 32.

[0040] As shown in Figures 2, 3, and 7, in one embodiment, a retaining base 313 is further formed on the valve seat base 31. The retaining base 313 is substantially annular in shape and is formed by reducing the diameter of one end of the valve seat base 31 that is away from the valve seat 20. One end of the elastic member 33 that is away from the diaphragm 32 abuts against the retaining base 313, and the other end contacts the diaphragm 32. As the diaphragm 32 moves away from the valve seat 20, the elastic member 33 is compressed and elastically deformed. Therefore, when the diaphragm 32 compresses the elastic member 33, the retaining base 313 can support the elastic member 33.

[0041] Preferably, the valve seat base 31 is fixedly connected to the valve seat 20 by welding. Of course, in other embodiments, the valve seat base 31 and the valve seat 20 may also be fixedly connected by a clamping method.

[0042] As an example, as shown in Figures 2, 3, 5, and 7, a stepped portion 24 is provided on the valve seat 20, and a folded portion 314 is provided on the valve seat base 31. The folded portion 314 is supported in contact with the stepped portion 24 of the valve seat 20 and then welded to fix the two together. By designing the dimensions of the stepped portion 24 on the valve seat 20 and the folded portion 314 on the valve seat base 31, the mounting accuracy of the relative position between the valve seat base 31 and the valve seat 20 can be ensured.

[0043] In this embodiment, the elastic member 33 is mounted so as to be pre-compressed between the diaphragm 32 and the retaining base 313 so that the elastic member 33 can exert a constant pressure on the diaphragm 32, and the diaphragm 32 comes into contact with the boss 22 under the pressure of the elastic member 33, which is advantageous for sealing the valve opening 21.

[0044] As shown in Figures 2 and 3, specifically, the elastic member 33 is provided as a conical spring, and the diameter of the conical spring gradually increases along the direction away from the valve seat 20. It can be seen that the conical spring has the advantage of being able to handle a large load, occupying little space, and being easy to use.

[0045] The elastic member 33 is not limited to this, and in other embodiments, it may be provided as a straight cylindrical spring, a return spring, rubber, etc., as long as the requirements for use of the elastic member 33 are met.

[0046] In this embodiment, the valve seat 20, the valve seat base 31, and the diaphragm 32 are all made of stainless steel and are all punched-out parts, making them easy to process and highly durable.

[0047] Therefore, the valve port 21 is closed before the medium enters the diaphragm-type one-way valve 100. At this time, the elastic force generated by the elastic member 33 presses the diaphragm 32 against the protrusion 22, closing the valve opening 21. After the medium enters the valve body 10 from one end of the inlet 111, a differential pressure is formed between one end of the inlet 111 and one end of the outlet 121 located on both sides of the diaphragm. That is, a differential pressure is formed on both sides of the diaphragm, and because the pushing force of the differential pressure is greater than the elastic force of the elastic member, the diaphragm 32 is pushed away from the valve opening 21 under the differential pressure of the medium. At this time, the valve opening 21 is opened, the elastic member 33 is compressed, and when the diaphragm 32 is pressed against the contact surface 3121, the flow hole 311 is fully opened, the diaphragm-type one-way valve 100 becomes fully open, and the medium introduced from the inlet 111 flows smoothly through the valve opening 21, the flow hole 311, and the medium passage 13 in sequence, and can flow out from the outlet 121.

[0048] The technical features of the embodiments described above can be combined in any way, and for the sake of simplicity, not all possible combinations of the technical features in the embodiments described above have been described. However, as long as these combinations of technical features are inconsistent, they should be considered to fall within the scope described herein.

[0049] The embodiments described above are merely examples of some embodiments of this application, and while their description is specific and detailed, it should not be understood as limiting the scope of the application. It should be noted that a person skilled in the art could make several further modifications and improvements without departing from the spirit of this application, all of which fall within the scope of protection of this application. Therefore, the scope of protection of the patent of this application shall be as defined in the attached claims.

Claims

1. A valve body having an inlet and an outlet, A valve seat attached to the valve body, the valve seat having a valve opening for connecting the inlet and the outlet, A diaphragm-type one-way valve comprising a valve seat base, a diaphragm, and an elastic member, wherein the valve seat base is provided within the valve body and connected to the valve seat, and the diaphragm is housed within the valve seat base and in contact with the elastic member, thereby controlling the opening and closing of the valve opening under the cooperative action of the medium in the valve opening and the elastic member, and controlling communication or blockage between the inlet and the outlet, A diaphragm-type one-way valve wherein a media passage is formed between the valve seat base and the inner circumferential wall of the valve body, at least one flow hole is drilled in the valve seat base, and the valve opening can communicate with the outlet via the flow hole and the media passage.

2. The diaphragm-type one-way valve according to claim 1, wherein the number of flow holes is multiple, and the multiple flow holes are arranged at intervals along the circumferential direction of the valve seat frame.

3. The sum of the areas of the multiple flow holes is greater than or equal to the minimum flow area of ​​the valve opening. and / or, the passage area of ​​the media passage is greater than or equal to the minimum flow area of ​​the valve opening, according to claim 2.

4. The valve seat base is provided with a limiting portion that is located on one side of the flow hole away from the valve seat and can contact the diaphragm, so as to restrict the movement of the diaphragm away from the valve seat. Alternatively, the valve seat base has a contact surface formed on one side of the flow hole away from the valve seat, which can contact the diaphragm, so as to restrict the movement of the diaphragm away from the valve seat.

5. A retaining base is further formed on the valve seat base, one end of the elastic member away from the diaphragm abuts against the retaining base, and as the diaphragm moves away from the valve seat, the elastic member is compressed and elastically deformed, as described in claim 1.

6. The diaphragm-type one-way valve according to claim 5, wherein the elastic member is mounted so as to be pre-compressed between the diaphragm and the retaining base.

7. The diaphragm-type one-way valve according to claim 5 or 6, wherein the elastic member is provided as a conical spring.

8. The valve body includes a first valve body and a second valve body, the first valve body and the second valve body are distributed on both sides of the valve seat and are welded and fixed to the valve seat. The diaphragm-type one-way valve according to claim 1, wherein the inlet is provided on the first valve body and the outlet is provided on the second valve body.

9. The first valve body is connected to and communicated with a first connecting pipe, and is used to connect to an external pipeline. Furthermore, the diaphragm-type one-way valve according to claim 8, wherein a second connecting pipe is connected to and communicates with the second valve body and is used for connection to an external pipeline.

10. A boss is formed on the valve seat, the boss is located on the outer circumference of the valve opening, and the diaphragm can be pressed against the boss by the elastic member to close the valve opening. Herein, the thickness of the boss gradually decreases along the direction toward the diaphragm, as described in claim 1, for a diaphragm-type one-way valve.

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