Stop valve and cooling system having the same

Abstract

A stop valve (100) and a cooling system (200) having the same. The stop valve (100) includes a valve body (10) having a valve orifice (161) formed therein, and a valve core (20) having at least a part of the valve core (20) disposed inside the valve body (10) and movable along the axial direction of the valve body (10) to seal or open the valve orifice (161), a first groove (22) is formed on the side of the valve core (20) facing the valve orifice (161), a first sealing member (221) is fitted into the first groove (22), and the first sealing member (221) and the first groove (22) are interference-fitted together, and a limiting portion (222) is provided on the inner wall of the first groove (22), and the limiting portion (222) can limit the first sealing member (221).

Description

[Technical field]

[0001] Related Applications This application claims priority to a Chinese patent application bearing application number 202220233391.1, filed on January 27, 2022, and titled "Stop valve and cooling system thereof," the entire contents of which are incorporated herein by reference.

[0002] TECHNICAL FIELD This application relates to the field of refrigeration, and in particular to a stop valve and a refrigeration system having the same. [Background technology]

[0003] In a cooling system, a stop valve plays an important role in blocking and throttling the medium in the piping in which it is located. The opening and closing member of the stop valve is a valve core, and it is mainly applied to blocking the medium in a low temperature environment.

[0004] In the stop valve of the related art, the valve core is abutted against the valve port to open and close the stop valve, but the closing mode between the valve core and the valve port is usually a hard seal, that is, the valve core is directly abutted against the valve port, but this type of sealing mode has low sealing performance and is prone to leakage. One solution is to provide a sealing member between the valve core and the valve port to improve the sealing performance, but this easily causes problems such as the sealing member being displaced and falling off from between the valve core and the valve port. Summary of the Invention

[0005] According to various embodiments of the present application, there is provided a stop valve including a valve body and a valve core, the valve body having a valve port, at least a portion of the valve core being disposed inside the valve body, and the valve body being movable axially to seal or open the valve port.

[0006] A first groove is drilled on the side of the valve core facing the valve orifice, a first sealing member is fitted into the first groove, and the first sealing member and the first groove are interference-fitted. A limiting portion is provided on the inner wall of the first groove, and the limiting portion can limit the first sealing member.

[0007] In one embodiment, the valve body includes an end cover and a valve seat, the end cover being located at the top end of the valve body or disposed inside the valve body, and the end cover being engaged with the valve core to seal the valve body; The valve seat is provided in the valve body, the valve seat defining a valve opening, and the first sealing member is capable of abutting against a peripheral side wall of the valve seat defining the valve opening to seal the valve opening.

[0008] In one embodiment, the hardness of the first sealing member is lower than that of the valve core, the first groove is an annular groove, the first sealing member is a sealing ring, and the sealing ring is made of pure copper.

[0009] In one embodiment, the width of the first groove gradually decreases along a direction approaching the valve orifice to form a restriction.

[0010] In one embodiment, the inner wall of the first groove close to the outer periphery of the valve core forms an inclined surface that gradually approaches the central axis of the valve core along the direction toward the valve orifice, and the inclined surface is the limiting portion.

[0011] In one embodiment, the inner wall of the first groove close to the central axis of the valve core forms an inclined surface that gradually moves away from the central axis of the valve core along the direction toward the valve orifice, and the inclined surface is the limiting portion.

[0012] In one embodiment, the included angle α between the inclined surface and the central axis of the valve core is 1° to 10°, the guide portion is provided with a guide segment, and the guide segment is chamfered in an arc shape.

[0013] In one embodiment, a guide portion is provided at one end of the valve core toward the valve orifice, the guide portion can guide the valve core to enter the valve orifice, the first sealing member is fitted to the outside of the guide portion, and the guide portion is provided with a guide segment, which is an arc-shaped chamfer.

[0014] In one embodiment, the valve core is provided with an operating part and a connecting part, the operating part is connected to one end of the connecting part remote from the valve seat, the diameter of the connecting part is larger than the diameter of the operating part, a step is formed between the connecting part and the operating part, a second sealing member is provided at the step, and the second sealing member is abutted against the side of the end cover adjacent to the valve core.

[0015] In one embodiment, a third sealing member is provided at the connection portion, and the third sealing member surrounds the outer circumferential side of the connection portion in the circumferential direction, and the outer circumferential side of the third sealing member abuts against the inner wall of the valve body in the circumferential direction to seal the valve body.

[0016] The present application further provides a cooling system including the above stop valve.

[0017] The details of one or more embodiments of the application are set forth in the drawings and description below. Other features, objects, and advantages of the application will become apparent from the description, drawings, and claims. [Brief description of the drawings]

[0018] To better describe and explain the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more drawings, in which additional details or examples used to explain the drawings should not be considered as limiting the scope of any of the disclosed inventions, the embodiments and / or examples described herein, and the best mode of these inventions as understood herein.

[0019] [Figure 1] 1 is a cross-sectional view of a stop valve according to one or more embodiments. [Diagram 2] FIG. 2 is a structural schematic diagram of a valve core according to one or more embodiments when a sealing member is not attached. [Diagram 3] 1 is a cross-sectional view of a valve core after a sealing member has been attached in accordance with one or more embodiments. [Figure 4] FIG. 1 is a perspective view of a stop valve according to one or more embodiments. [Diagram 5]FIG. 1 is a structural schematic diagram of a cooling system according to one or more embodiments.

[0020] In the drawings, the meanings of the symbols are as follows: 100 stop valve, 10 valve body, 11 first opening, 12 first connecting pipe, 13 second opening, 14 second connecting pipe, 15 end cover, 151 second screw segment, 16 valve seat, 161 valve port, 20 valve core, 21 operating portion, 211 first screw segment, 22 first groove, 221 first sealing member, 22A inclined surface, 222 limiting portion, 23 guide portion, 231 guide segment, 24 second sealing member, 25 third sealing member, 26 connecting portion, 30 valve assembly, 31 housing, 32 fourth sealing member, 33 connecting body, 34 elastic member, 35 valve core, 200 cooling system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the technical aspects of the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are merely some of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is actually merely explanatory, and does not impose any restrictions on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present application.

[0022] It should be explained that when an assembly is said to be "built into" another assembly, it may be built directly into the other assembly, or there may be an intervening assembly present. When an assembly is said to be "mounted" on another assembly, it may be mounted directly on the other assembly, or there may be an intervening assembly present at the same time. When an assembly is said to be "fastened" to another assembly, it may be fastened directly to the other assembly, or there may be an intervening assembly present at the same time.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. Herein, the terms used in the specification of this application are merely intended to describe specific embodiments and are not intended to limit the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] 1 to 5, such a stop valve 100 is installed in a cooling system 200 and is used to provide pipeline communication and isolation.

[0025] The stop valve 100 includes a valve body 10 and a valve core 20, and the valve body 10 is connected to the valve core 20. The inside of the valve body 10 is hollow and is used to accommodate components such as the valve core 20. At least a part of the valve core 20 is provided inside the valve body 10 and can move along the axial direction of the valve body 10.

[0026] The valve body 10 is further provided with a first opening 11 and a second opening 13. A first communication tube 12 is connected to the side of the first opening 11 away from the valve body 10, and the first opening 11 is connected to the outside via the first communication tube 12, and a second communication tube 14 is connected to the side of the second opening 13 away from the valve body 10, and the second opening 13 is connected to the outside via the second communication tube 14. The first communication tube 12 and the second communication tube 14 are respectively used as an inlet and an outlet for the medium. When the first communication tube 12 is used as an inlet for the medium, the medium enters the stop valve 100 from the first communication tube 12 and enters the inside of the valve body 10 through the first opening 11. When the stop valve 100 is in an open state, the medium passes through the second opening 13, the second communication tube 14, and flows out of the stop valve 100. Conversely, the medium may enter the valve body 10 from the second communicating tube 14 via the second opening 13 and then exit the stop valve 100 via the first opening 11 and the first communicating tube 12 .

[0027] The valve body 10 further includes an end cover 15 and a valve seat 16. The end cover 15 is located at the uppermost end of the valve body 10 and engages with the valve core 20 to seal the valve body 10, thereby preventing impurities such as external dust and powder from entering the inside of the valve body 10 and affecting the sealing ability of the stop valve 100 to open and close the valve and the purity of the medium in the valve body 10, and preventing the realization of other related functions of the stop valve 100.

[0028] Alternatively, the end cover 15 may be provided inside the valve body 10, that is, the outer periphery of the end cover 15 abuts against the inner periphery of the valve body 10, and the inner periphery of the end cover 15 abuts against the outer periphery of the valve core 20, and in this design, the end cover 15 is engaged with the valve core 20, and can also play a role in sealing the valve body 10. The position of the end cover 15 is not limited to the embodiment described in this embodiment, and may be any position as long as it can achieve the above function.

[0029] The valve seat 16 is provided in the valve body 10 and abuts against and engages with the valve core 20 to realize communication or blocking inside the valve body 10. In this embodiment, the valve seat 16 is provided at the first opening 11, and in other embodiments, the valve seat 16 may be provided between the first opening 11 and the second opening 13.

[0030] Specifically, in this embodiment, a valve port 161 is drilled in the valve seat 16, and the valve port 161 is connected to the first opening 11, together forming a passage through which the medium flows in or out. The axial movement of the valve core 20 can seal or open the valve port 161 to block the medium. Optionally, in this embodiment, the valve seat 16 and the valve body 10 are provided separately to reduce the difficulty of processing. Optionally, in other embodiments, the valve seat 16 can be directly formed by the valve body 10, and the valve port 161 can be directly drilled in the valve body 10.

[0031] 1 to 3, a first groove 22 is drilled on the side of the valve core 20 facing the valve port 161, and a first sealing member 221 is fitted into the first groove 22, so that the first sealing member 221 and the first groove 22 are interference-fitted. The first sealing member 221 can improve the sealing performance between the valve core 20 and the valve seat 16, and the first sealing member 221 and the first groove 22 receive each other's supporting force due to the pressing force generated by the deformation of the first sealing member 221 itself, thereby realizing a fixed restriction, and preventing the first sealing member 221 from falling off the first groove 22 and affecting the sealing performance of the stop valve 100.

[0032] Specifically, the first sealing member 221 and the valve core 20 have different hardnesses. Due to the difference in material and hardness between the two, the one with the lower hardness will experience greater deformation, thereby strengthening the restraining strength of the two. However, since the two are made of the same material and hardness, it is possible to prevent the two from bursting during the interference fit process.

[0033] Furthermore, since the hardness of the first sealing member 221 is lower than that of the valve core 20, it is easier to insert the first sealing member 221 into the first groove 22, and the contact between the first sealing member 221 and the valve seat 16 is tighter.

[0034] In this embodiment, a limiting portion 222 is provided on the inner wall of the first groove 22, and the limiting portion 222 can limit the first sealing member 221, and the limiting portion 222 can further limit the first sealing member 221 in the first groove 22 to prevent it from falling off.

[0035] Specifically, the groove width of the first groove 22 gradually decreases in the direction approaching the valve port 161 to form a restricting portion 222. If the size of the groove opening of the first groove 22 is smaller than the size of the groove body and the groove bottom of the first groove 22, the first sealing member 221 is less likely to fall off the groove opening of the first groove 22, and since the first sealing member 221 is restricted by the groove width of the first groove 22, the structure is simple and does not require the provision of an additional member.

[0036] Furthermore, the inner wall of the first groove 22 close to the outer periphery of the valve core 20 gradually approaches the central axis of the valve core 20 along the direction toward the valve orifice 161 to form an inclined surface 22A, and the inclined surface 22A is the limiting portion 222. Of course, in other embodiments, the inner wall of the first groove 22 close to the central axis of the valve core 20 can be gradually separated from the central axis of the valve core 20 along the direction toward the valve orifice 161 to form the inclined surface 22A as the limiting portion 222, and the method of forming the limiting portion 222 is not limited to the method described in this embodiment.

[0037] The included angle α between the inclined surface 22A and the central axis of the valve core 20 is set to 1° to 10°, which not only ensures the fastness of the restricting portion 222 to restrict the first sealing member 221 and prevents it from falling off from the first groove 22, but also prevents the groove opening of the first groove 22 from being too small, making it difficult to push the first sealing member 221 into the first groove 22, or damaging the first sealing member 221 or the first groove 22 during the pushing process.

[0038] The degree of the included angle α between the inclined surface 22A and the central axis of the valve core 20 is 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, or it may be 1.5°, 2.5°, etc., and it can be understood that the degree of the above included angle α may be within the range of 1° to 10° and is not limited to an integer.

[0039] In this embodiment, the first groove 22 is an annular groove, and the first sealing member 221 is a sealing ring, so that the contact area between the first groove 22 and the first sealing member 221 is increased as much as possible, the engagement between the first groove 22 and the first sealing member 221 is made closer, and the contact area between the sealing ring and the valve seat 16 is also increased. The sealing ring corresponds to the shape of the valve port 161 to achieve sealing in all directions, and the sealing effect of the valve core is further enhanced.

[0040] The sealing ring is made of pure copper, which not only ensures strength but also has a certain flexibility, thereby enhancing the sealing performance through compression deformation.

[0041] The valve core 20 includes an operating portion 21, a guide portion 23, and a connecting portion 26, and the connecting portion 26 connects the operating portion 21 and the guide portion 23. The operating portion 21 is located at one end of the connecting portion 26 away from the valve seat 16, and one end of the operating portion 21 protrudes from the end cover 15. The guide portion 23 is located at one end of the connecting portion 26 close to the valve seat 16, and can guide the valve core 20 to enter the valve port 161.

[0042] The operating part 21 protrudes from the upper end surface of the end cover 15, and is easy to process and remove. The operating part 21 is provided as a hollow structure that opens at the upper end, and a plurality of flat surfaces are distributed at uniform intervals on the inner surface of the operating part 21, so that it can be applied to tools such as hexagonal wrenches. In another embodiment, the flat surfaces on the inner surface of the operating part 21 may be provided with uneven intervals to be applied to wrenches of irregular shapes.

[0043] A first screw segment 211 is provided on the outer periphery of the operating part 21, and a second screw segment 151 is provided on the inner surface of the end cover 15, and the second screw segment 151 is engaged with the first screw segment 211 to allow the valve core 20 to move in the axial direction.

[0044] The outer wall of the valve core 20 abuts against the inner wall of the valve body 10, allowing the valve core 20 to move axially along the inner wall of the valve body 10. Because the diameter of the connecting part 26 is larger than that of the operating part 21, a step is formed between the connecting part 26 and the operating part 21, and the second sealing member 24 is provided on the step, which can abut against the side of the end cover 15 close to the valve core 20. When the valve core 20 moves toward the end cover 15 to an extreme position, that is, when the second sealing member 24 abuts against the end cover 15, the second sealing member 24 can play a buffering role and enhance the sealing between them.

[0045] A third sealing member 25 is further provided at one end of the valve core 20 adjacent to the operating portion 21, the third sealing member 25 circumferentially surrounding the outer periphery of the valve core 20, and the outer periphery of the third sealing member 25 abuts against the inner wall of the valve body 10 along the circumferential direction to seal the valve body 10 and prevent the medium from leaking during the process of flowing through the first opening 11 and the second opening 13. In other embodiments, the third sealing member 25 may be replaced with a member that can perform a similar sealing role, such as a gasket.

[0046] The guide portion 23 is located at an end of the valve core 20 adjacent to the first opening 11 and is used to guide the valve core 20 to be inserted into the valve orifice 161 so as to achieve a sealed engagement between the valve core 20 and the valve orifice 161.

[0047] The guide portion 23 is provided with a guide segment 231. In this embodiment, the guide segment 231 has an arc-shaped chamfer, which makes it easy for the valve core 20 to be inserted into the valve orifice 161 and prevents the valve core 20 and the valve orifice 161 from colliding or interfering with each other, preventing the valve from being opened and closed smoothly.

[0048] Furthermore, the stop valve 100 further includes a valve assembly 30, which is connected to the valve body 10. In this embodiment, the valve assembly 30 and the second opening 13 are disposed opposite to each other and serve as an air supply inlet or an air discharge outlet to replenish or discharge the medium throughout the cooling system 200. In other embodiments, the axis of the valve assembly 30 may be disposed perpendicular to the axis of the second opening 13, and the valve assembly 30 may be disposed at other positions on the valve body 10.

[0049] The valve assembly 30 includes a connecting body 33 that is connected to the valve body 10 and provides a passage for the medium to enter or exit the valve body 10 .

[0050] The valve assembly 30 further includes a valve core 35, a housing 31, and a fourth sealing member 32. The valve core 35 is disposed within the connecting body 33 and can communicate or block the interior of the valve element 10 from the interior of the connecting body 33. The housing 31 is fitted to the outer periphery of the connecting body 33 to protect the valve core 35 and prevent external impurities from entering. The fourth sealing member 32 is disposed between the housing 31 and the connecting body 33 and engaged with the housing 31 to seal the connecting body 33.

[0051] Specifically, an elastic member 34 is provided at one end of the valve core 35, and when the valve core 35 is not subjected to external pressure, it maintains a closed state, at which time the connecting body 33 maintains a sealed state to isolate the inside of the valve disc 10 from the outside. When the valve core 35 is subjected to pressure, the valve core 35 presses the elastic member 34 and moves in a direction approaching the valve disc 10, thereby releasing the seal and connecting the inside of the valve disc 10 to the inside of the connecting body 33, allowing the medium to enter the inside of the valve disc 10 or flow out from the inside of the valve disc 10. The elastic member 34 is used to reset the valve core 35.

[0052] As shown in FIG. 5 , the present application further provides a cooling system 200 including the above-mentioned stop valve 100, where the stop valve 100 is installed in a medium passage of the cooling system 200 and is used to control the blocking and flow of the medium passage and to replenish the medium to the cooling system 200.

[0053] During the operation of the stop valve 100 of this embodiment, when it is necessary to close the stop valve 100, the operating part 21 at the top of the stop valve 100 is twisted to rotate the operating part 21 and the valve core 20 synchronously. Through the engagement between the first screw segment 211 and the second screw segment 151, the valve core 20 is moved axially relative to the end cover 15 in conjunction with each other, so that the guide part 23 at the bottom end of the valve core 20 is inserted into the valve port 161, and the first sealing member 221 abuts against the valve seat 16 to seal the first communicating pipe 12, thereby realizing the blocking between the first communicating pipe 12 and the second communicating pipe 14.

[0054] Compared with the related art, the present application improves the sealing performance between the valve core 20 and the valve seat 16 by using the first sealing member 221, and the first sealing member 221 and the first groove 22 support each other through the pressing force generated by the deformation of the first sealing member 221 itself, thereby realizing a fixed restriction and preventing the first sealing member 221 from falling off the first groove 22 and affecting the sealing performance of the stop valve 100.

[0055] The technical features of the above embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; however, as long as there is no contradiction in the combination of these technical features, all of them should be considered within the scope described in this specification.

[0056] The above examples merely show some embodiments of the present application, and although the description is relatively specific and detailed, it should not be understood as limiting the scope of the claims of the present application. It should be pointed out that those skilled in the art can make some modifications and improvements without departing from the spirit of the present application, and all of these are included in the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be according to the scope of the attached claims.

Claims

1. a valve body provided with a valve port; a valve core, at least a part of which is provided within the valve body and which can move along an axial direction of the valve body to seal or open the valve port; a first groove is drilled on a side of the valve core toward the valve orifice, a first sealing member is fitted into the first groove, and the first sealing member and the first groove are interference-fitted, and a limiting portion is provided on an inner wall of the first groove, which can limit the first sealing member.

2. The valve body includes an end cover and a valve seat, the end cover is located at the top end of the valve body or is provided inside the valve body, and the end cover is engaged with the valve core to seal the valve body; 2. The stop valve according to claim 1, wherein the valve seat is provided within the valve body, the valve seat forms the valve opening, and the first sealing member is capable of abutting against a peripheral side wall of the valve seat that forms the valve opening to seal the valve opening.

3. 3. The stop valve as claimed in claim 2, wherein the hardness of the first sealing member is lower than that of the valve core, the first groove is an annular groove, the first sealing member is a sealing ring, and the sealing ring is made of pure copper.

4. The stop valve according to claim 1 , wherein a groove width of the first groove is gradually decreased in a direction approaching the valve port to form the restricting portion.

5. 5. The stop valve according to claim 4, wherein an inner wall of the first groove adjacent to an outer periphery of the valve core forms an inclined surface gradually approaching a central axis of the valve core along a direction toward the valve port, the inclined surface being the limiting portion.

6. 5. The stop valve according to claim 4, wherein an inner wall of the first groove adjacent to the central axis of the valve core forms an inclined surface that gradually moves away from the central axis of the valve core along a direction toward the valve opening, and the inclined surface is the limiting portion.

7. The stop valve according to claim 5, wherein the angle α between the restriction portion and the central axis of the valve core is 1° to 10°.

8. a guide portion is provided at one end of the valve core toward the valve opening, the guide portion can guide the valve core to enter the valve opening, and the first sealing member is fitted to the outside of the guide portion; The stop valve according to claim 1 , wherein the guide portion is provided with a guide segment, and the guide segment is a circular arc chamfer.

9. 3. The stop valve according to claim 2, wherein the valve core is provided with an operating portion and a connecting portion, the operating portion is connected to one end of the connecting portion remote from the valve seat, the diameter of the connecting portion is larger than the diameter of the operating portion, a step is formed between the connecting portion and the operating portion, a second sealing member is provided at the step, and the second sealing member is abutted against a side of the end cover adjacent to the valve core.

10. 10. The stop valve according to claim 9, wherein a third sealing member is provided at the connection portion, the third sealing member surrounding an outer circumferential side of the connection portion in a circumferential direction, and the outer circumferential side of the third sealing member abuts against an inner wall of the valve body in the circumferential direction to seal the valve body.

11. A cooling system comprising a stop valve according to any one of claims 1 to 10.

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