Globe valve

Abstract

A globe valve (100). The globe valve (100) comprises a valve body (10), a valve element (20), an elastic member (30) and a driving member (60). The valve body (10) is provided with a fluid channel (101) and a limiting opening (103), and a sealing portion (11) is formed on the inner wall of the fluid channel (101). The valve element (20) comprises a valve stem portion (21) and a valve head portion (22). The valve head portion (22) is arranged in the fluid channel (101) and is located on the side of the sealing portion (11) away from the limiting opening (103). One end of the valve stem portion (21) is connected to the valve head portion (22), and the other end thereof extends out of the limiting opening (103). The elastic member (30) is arranged in the fluid channel (101) and is sleeved on the outer periphery of the valve stem portion (21), and one end of the elastic member (30) abuts against the valve head portion (22) and the other end thereof abuts against the inner wall of the fluid channel (101).

Description

Stop valve

[0001] Related applications

[0002] The present application claims priority to Chinese Patent Application No. 202421146195.6, filed on May 23, 2024, entitled “Electric stop valve” and Chinese Patent Application No. 202421147559.2, filed on May 23, 2024, entitled “Stop valve”, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of valves, in particular to a stop valve. BACKGROUND

[0004] A stop valve is often provided in an air conditioning system to achieve pipeline interruption through the stop valve when the air conditioning system leaks or needs to be maintained, so as to prevent refrigerant leakage and improve safety, especially when the relevant part of the refrigerant is slightly flammable, and a large amount of leakage will cause serious safety accidents.

[0005] In the related art, the stop valve usually includes a valve body and a valve core, the valve core is moved in the valve body, and the sealing cooperation with the valve port is realized when the stop valve is closed. However, the valve core and the valve body are often threadedly connected, and the response speed is slow, which is difficult to meet the working condition of quickly realizing refrigerant interruption, and the safety is insufficient. SUMMARY

[0006] According to various embodiments of the present application, a stop valve is provided.

[0007] The present application provides a stop valve, which includes a valve body, a valve core, an elastic member and a driving member, the valve body is provided with a fluid passage and a limiting opening communicating with the fluid passage, and an inner wall of the fluid passage is formed with a sealing portion; the valve core includes a valve rod portion and a valve head portion, the valve head portion is arranged in the fluid passage and located on the side of the sealing portion away from the limiting opening; one end of the valve rod portion is connected to the valve head portion, and the other end of the valve rod portion extends out of the limiting opening through the fluid passage, and the valve rod portion is gap-connected with the fluid passage; the elastic member is arranged in the fluid passage and sleeved on the outer periphery of the valve rod portion, and one end of the elastic member abuts against the valve head portion, and the other end of the elastic member abuts against the inner wall of the fluid passage; the driving member is connected to one end of the valve rod portion extending out of the limiting opening, and the valve rod portion can move linearly in the direction away from the limiting opening in response to the action of the driving member, and drive the valve head portion to move synchronously, so that the valve head portion abuts against and sealingly cooperates with the sealing portion, and the elastic member is compressed.

[0008] The application also provides a stop valve, which comprises a valve body, a valve core, an elastic member and a driving member, the valve body is provided with a fluid passage and a limiting opening communicating with the fluid passage, and a sealing part is formed in the fluid passage; the valve core comprises a valve rod part, a valve head part and a limiting part, the valve head part is arranged in the fluid passage and located on the side of the sealing part away from the mounting hole; one end of the valve rod part is connected with the valve head part, the other end of the valve rod part extends out of the limiting opening and is connected with the limiting part, the valve core and the valve body are movably connected; the elastic member is arranged outside the fluid passage and sleeved on the outer periphery of the valve rod part, one end of the elastic member abuts against the limiting part, and the other end of the elastic member abuts against the end face of the valve body provided with the limiting opening; the driving member is connected with the valve body, and the output end of the driving member is stopped on the end face of the limiting part away from the valve rod part; when the driving member is powered, the driving member can push the limiting part to move towards the limiting opening, and drive the valve rod part and the valve head part to move synchronously, so that the valve head part is away from the sealing part and the fluid passage is conducted, and the elastic member is in a compressed state; when the driving member is powered off, the elastic member pushes the limiting part to move away from the limiting opening under the elastic force, so that the valve head part abuts against the sealing part and is sealingly connected with the sealing part.

[0009] The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the application will be apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF DRAWINGS

[0010] To better describe and illustrate embodiments and / or examples of the inventions disclosed herein, reference can be made to one or more drawings. Additional details or examples used to describe the drawings should not be considered limiting to the scope of any of the disclosed inventions, presently described embodiments and / or examples, and the best mode presently contemplated of these inventions.

[0011] Fig. 1 is a structural schematic view of a stop valve according to an embodiment of the application.

[0012] Fig. 2 is a sectional view of the stop valve according to an embodiment of the application in an open state.

[0013] Fig. 3 is an enlarged view of A in Fig. 2.

[0014] Fig. 4 is an enlarged view of B in Fig. 2.

[0015] Fig. 5 is a sectional view of the stop valve according to an embodiment of the application in a closed state.

[0016] Fig. 6 is a sectional view of a stop valve according to another embodiment of the application in an open state.

[0017] Fig. 7 is a sectional view of another embodiment provided by the present application in an open state of the stop valve.

[0018] Fig. 8 is a sectional view of an embodiment provided by the present application in an open state of the stop valve.

[0019] Fig. 9 is an enlarged view of A in Fig. 8.

[0020] Fig. 10 is an enlarged view of B in Fig. 8.

[0021] Fig. 11 is a sectional view of an embodiment provided by the present application in a closed state of the stop valve.

[0022] The symbols in the drawings represent the following meanings: 100, stop valve; 10, valve body; 101, fluid passage; 1011, valve cavity; 1012, first passage; 1013, second passage; 1014, valve port; 102, mounting hole; 103, limiting opening; 11, sealing portion; 111, sealing corner; 20, valve core; 21, valve stem portion; 211, second mounting groove; 22, valve head portion; 221, first mounting groove; 23, limiting portion; 30, elastic member; 40, first sealing member; 41, sealing taper surface; 50, second sealing member; 60, driving member; 61, push-pull rod; 611, clamping groove; 62, abutting portion; 63, driving body; 70, valve nozzle; 701, mounting cavity; 71, valve core. DETAILED DESCRIPTION

[0023] In order to make the above objectives, features and advantages of the present application more clear and easily understood, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details. In other instances, well-known process steps have not been described in detail in order to avoid unnecessarily obscuring the present application. The specific embodiments of the present application are not intended to be limiting, and reference is made to the appended claims to define the scope of the present application.

[0024] It should be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or intervening elements can be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element, or intervening elements can be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions as used herein are for the purpose of illustration only and do not indicate the only possible orientation of the present application.

[0025] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" etc. can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, for example two, three, etc., unless otherwise explicitly and specifically limited.

[0026] In the present application, unless otherwise explicitly specified and limited, the "on", "under" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0027] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0028] A stop valve is usually provided in an air conditioning system to achieve pipeline interruption through the stop valve when the air conditioning system leaks or needs maintenance, so as to prevent refrigerant leakage and improve safety, especially when the relevant part of the refrigerant is slightly flammable, and a large amount of leakage will cause serious safety accidents.

[0029] In the related art, the stop valve usually includes a valve body and a valve core, and the valve core is moved in the valve body and sealed with the valve port to achieve the closing of the stop valve. However, the valve core and the valve body are often threadedly connected, and the response speed is slow, which is difficult to meet the working condition of quickly cutting off the refrigerant, and the safety is insufficient.

[0030] Please refer to FIG. 1-7, in order to solve the problem of slow closing speed of the related stop valve, the present application provides a stop valve 100. The stop valve 100 includes a valve body 10, a valve core 20, an elastic member 30 and a driving member 60, the valve body 10 is provided with a fluid passage 101, a limiting opening 103 and a mounting hole 102 communicating the fluid passage 101 and the limiting opening 103, and the inner wall of the fluid passage 101 is formed with a sealing part 11.

[0031] Specifically, the fluid passage 101 comprises a first passage 1012, a second passage 1013, and a valve cavity 1011 connecting the first passage 1012 and the second passage 1013, wherein the valve cavity 1011 and the first passage 1012 are connected at a valve port 1014 of the stop valve 100, and the sealing part 11 is arranged at the valve port 1014 to cooperate with the valve core 20 to achieve sealing when the valve port 1014 is closed. Further, the first passage 1012 and the second passage 1013 are arranged at an angle, and in some embodiments, the first passage 1012 and the second passage 1013 are perpendicular to each other, and the axial direction of the first passage 1012 is parallel or coincides with the axial direction of the valve core 20.

[0032] Generally, the air conditioning system has both refrigeration and heating working conditions, and the flow direction of the refrigerant in the stop valve 100 is opposite in the refrigeration and heating working conditions. For example, the stop valve 100 provided in the present application is used in the refrigeration working condition, and the refrigerant flows into the valve cavity 1011 from the first passage 1012 and flows out from the second passage 1013, and in the heating working condition, the refrigerant flows into the valve cavity 1011 from the second passage 1013 and flows out from the first passage 1012, and the present application will be described hereinafter based on this example. Of course, in other embodiments, the flow direction of the refrigerant in the refrigeration and heating working conditions can also be changed, that is, in the heating working condition, the refrigerant flows into the valve cavity 1011 from the first passage 1012 and flows out from the second passage 1013, and in the refrigeration working condition, the refrigerant flows into the valve cavity 1011 from the second passage 1013 and flows out from the first passage 1012.

[0033] Please continue to refer to FIGS. 2-5, the valve core 20 provided in the present application comprises a valve stem part 21, a valve head part 22, and a limiting part 23, the valve head part 22 is arranged in the fluid passage 101 and located on the side of the sealing part 11 away from the limiting opening 103. One end of the valve stem part 21 is connected to the valve head part 22, and the other end extends out of the limiting opening 103 through the fluid passage 101 and the mounting hole 102 and is connected to the limiting part 23, and the valve stem part 21 is in clearance fit with the fluid passage 101. Further, the elastic member 30 is arranged in the fluid passage 101 and is sleeved on the outer periphery of the valve stem part 21, and one end of the elastic member 30 abuts against the valve head part 22, and the other end abuts against the inner wall of the fluid passage 101 near one end of the mounting hole 102. The driving member 60 is connected to the end of the valve stem part 21 extending out of the limiting opening 103, and the valve stem part 21 can move linearly in the direction away from the limiting opening 103 in response to the action of the driving member 60, and drive the valve head part 22 to move synchronously, so that the valve head part 22 abuts against and sealingly cooperates with the sealing part 11, and compresses the elastic member 30.

[0034] It can be understood that, by sleeving the elastic member 30 on the outer periphery of the valve stem portion 21 of the valve core 20, the valve head portion 22 is supported by the elastic member 30, so that the valve head portion 22 is prevented from moving to the position close to the sealing portion 11 due to the impact of the refrigerant and the like, thereby causing the fluid passage 101 to be cut off, so that the flow-through function of the stop valve 100 in the normal state is realized. At the same time, by the driving member 60 applying an axial moving force to the valve stem portion 21 to move away from the limiting opening 103, the valve core 20 as a whole is driven to move, and when the valve head portion 22 moves to sealingly abut against the sealing portion 11, the fluid passage 101 is cut off. The whole moving process is a linear cooperation along the axial direction, the stroke is short, the response speed is fast, compared with the traditional threaded rotating structure, the fluid passage 101 can be quickly cut off, thereby further reducing the probability of refrigerant leakage. In addition, due to the elastic support of the elastic member 30, the stop valve 100 is in the normally open state under normal working conditions, so the valve stem portion 21 needs to be applied with a force to move the valve core 20 only when the stop valve 100 is closed, that is, the driving member 60 needs to be turned on only when the stop valve 100 is closed, which is beneficial to reduce the energy consumption, and the operation steps are less, which can effectively reduce the control difficulty and control cost.

[0035] In some embodiments, the driving member 60 is a structure that directly moves along the axial direction of the output shaft and does not rotate. Alternatively, the driving member 60 can be a linear motor, a driving cylinder or a driving oil cylinder, etc.

[0036] Specifically, the output end of the driving member 60 is connected to the limiting portion 23. The limiting portion 23 protrudes from the side of the valve stem portion 21 along the radial direction of the valve core 20, and the limiting portion 23 can be stopped and cooperated with the limiting opening 103 to limit the valve core 20, thereby preventing the valve core 20 from being separated from the valve body 10 under the action of elastic force or fluid pressure, etc., and improving the installation stability of the valve core 20. In some embodiments, the part of the valve stem portion 21 protruding out of the limiting opening 103 can be flattened by riveting, which is simple to form and can reduce the assembly difficulty of the valve core 20 and the elastic member 30 as a whole.

[0037] Further, the valve body 10 in the embodiment is of an integrated structure, which greatly simplifies the structure of the valve body 10, reduces the number of parts, and thus reduces the cost.

[0038] In an embodiment, the axis of the first passage 1012, the axis of the valve core 20 and the axis of the limiting opening 103 can be coaxially arranged, so that the valve stem portion 21 of the valve core 20 can directly pass through the limiting opening 103 through the first passage 1012, thereby facilitating the installation of the valve core 20 and reducing the probability of interference among the three.

[0039] To further improve the reliability of the closing of the stop valve 100, in an embodiment, as shown in FIGS. 2 and 3, the output end of the driving member 60 is connected with a push-pull rod 61 for driving the push-pull rod 61 to move along the axial direction of the valve core 20. Among them, the end of the push-pull rod 61 is recessed in the axial direction to form a clamping groove 611, the limiting portion 23 extends into the clamping groove 611 and is clamped with the clamping groove 611, so that the connection between the limiting portion 23 and the push-pull rod is more firm.

[0040] Therefore, when the air conditioning system detects that a leakage occurs inside, the valve core 20 can be quickly moved by using the driving member 60 to drive, the operation is simple, the overall response speed is faster, automatic control can be realized, and the safety is higher. Moreover, after the repair is completed, the driving member 60 can be closed, and under the elastic recovery action of the elastic member 30, the valve head portion 22 can automatically move away from the sealing portion 11, so as to open the valve port 1014 and realize the normal circulation of the refrigerant. In addition, when the refrigerant circulates normally, the driving member 60 can be kept in a closed state, thereby saving energy and reducing energy consumption cost. Of course, the driving member 60 can also be started, and the opening degree of the stop valve 100 is adjusted by cooperating the power adjustment of the driving member 60 with the elastic force of the elastic member 30 and the length of the valve rod portion 21, so as to meet the flow demand under different working conditions.

[0041] Specifically, the driving member 60 is connected with the valve body 10 through threads, so that fastening is realized by torque, the disassembly is fast, the connection is simple, and the reliability of the connection of the driving member 60 can be ensured. At the same time, in order to improve the sealing between the driving member 60 and the valve body 10, as shown in FIG. 3, an abutting portion 62 and a driving body 63 can be arranged on the driving member 60, so that when the driving member 60 and the valve body 10 are tightened, the abutting portion 62 abuts against the end face of the limiting opening 103 of the valve body 10, thereby realizing hard sealing cooperation.

[0042] In an embodiment, the driving member 60 is connected with the valve body 10 through threads, so that fastening is realized by torque, the disassembly is fast, the connection is simple, and the reliability of the connection of the driving member 60 can be ensured. At the same time, in order to improve the sealing between the driving member 60 and the valve body 10, as shown in FIGS. 3, 8 and 9, an abutting portion 62 and a driving body 63 can be arranged on the driving member 60, one end of the abutting portion 62 is connected with the driving body 63 along the axial direction of the abutting portion 62, the other end is arranged in a shrinkage manner towards the direction close to the axial line of the abutting portion 62, the driving body 63 is sleeved on one end of the valve body 10 and is connected with the valve body 10 through threads, the output end of the driving body 63 is connected with the push-pull rod 61 and abuts against the end face of the limiting portion 23 away from the valve rod portion 21 through the push-pull rod 61, so that when the driving member 60 and the valve body 10 are tightened and / or locked, the abutting portion 62 abuts against the end face of the limiting opening 103 of the valve body 10, thereby realizing hard sealing cooperation.

[0043] Therefore, the sealing fit between the driving member 60 and the valve body 10 can be achieved, the probability of leakage of the refrigerant from the limiting opening 103 is reduced, and the safety is improved.

[0044] In addition, the structure and connection mode of the driving member 60 are relatively simple, the installation difficulty of the driving member 60 can be reduced, the driving member 60 is connected with the valve body 10 through the threaded connection of the driving body 63, the fastening can be achieved by using torque, and the connection reliability of the driving member 60 is improved. Meanwhile, the push-pull rod 61 and the limiting part 23 are only in abutting fit, and the driving member 60 can push the valve core 20, and the connection difficulty of the whole is further reduced.

[0045] In order to further reduce the probability of leakage of the refrigerant from the limiting opening 103, in an embodiment, as shown in FIG. 3, the outer side wall of the valve rod part 21 is provided with a second installation groove 211 which is recessed towards the axis direction. The stop valve 100 further comprises a second sealing member 50, the second sealing member 50 is installed in the second installation groove 211, and the valve rod part 21 is in axial movable sealing fit with the inner wall of the installation hole 102 through the second sealing member 50.

[0046] The second sealing member 50 can be an O-shaped ring and is made of plastic or rubber, so that the second sealing member 50 has good sealing performance.

[0047] Further, in an embodiment, the number of the second sealing members 50 is multiple, and the multiple second sealing members 50 are arranged in the axial direction of the valve core 20. The second installation groove 211 and the number of the second sealing members 50 are arranged one by one.

[0048] By arranging multiple second sealing members 50, the sealing performance can be further improved, the positioning of the valve rod part 21 can be achieved, the perpendicularity of the valve rod part 21 is ensured, and the inclination of the valve rod part 21 caused by the impact of the refrigerant is effectively prevented. In this embodiment, two second sealing members 50 are arranged to reduce the installation difficulty. Of course, in other embodiments, the number of the second sealing members 50 can be three or four, and the number can be reasonably arranged according to actual needs.

[0049] In an embodiment, as shown in FIG. 4, along the axial direction of the valve core 20, the valve head part 22 gradually expands from the end away from the valve rod part 21 towards the valve rod part 21. Therefore, the surface of the valve head part 22 can have a certain buffering effect. When the refrigerant entering through the first channel 1012 impacts on the valve head part 22, the refrigerant can flow through the surface of the valve head part 22, so that the impact pressure on the valve head part 22 is reduced, the stability of the valve core 20 is improved, and the load of the driving member 60 and the elastic member 30 is reduced.

[0050] In another embodiment, as shown in FIG. 4, along the axial direction of the valve core 20, the valve head 22 has a gradually expanding trend from the end close to the valve rod 21 to the direction away from the valve rod 21. In this way, the surface of the valve head 22 can also play a certain buffering role, so that when the refrigerant entering through the second channel 1013 impacts on the valve head 22, it can flow through the surface of the valve head 22, thereby reducing the impact on the valve head 22, reducing the pressure on the valve head 22, and improving the stability of the valve core 20 as a whole.

[0051] In yet another embodiment, as shown in FIG. 4, both ends of the valve head 22 in the axial direction have a gradually expanding trend from the end to the middle position, so that the refrigerant flowing in opposite directions in the cooling or heating mode can be buffered by the surface of the valve head 22, further ensuring the stability of the valve core 20 installation.

[0052] Specifically, the end of the valve head 22 close to the valve rod 21 and / or the end of the valve head 22 away from the valve rod 21 can be conical or semi-elliptical, etc., as long as the same effect can be achieved.

[0053] In an embodiment, as shown in FIG. 4, the stop valve 100 further comprises a first sealing member 40, and the outer periphery of the side of the valve head 22 close to the valve rod 21 is provided with a first mounting groove 221 recessed towards the direction close to the axis, and the first sealing member 40 is at least partially mounted in the first mounting groove 221. The first sealing member 40 can be driven by the valve head 22 to move towards the direction close to the sealing portion 11 and abut against the sealing portion 11 to form a soft seal. Through the contact seal between the first sealing member 40 and the sealing portion 11, the sealing performance of the valve port 1014 when the stop valve 100 is closed can be better guaranteed.

[0054] Specifically, in an embodiment, the first sealing member 40 is a plastic or rubber member, so that the first sealing member 40 has a certain elasticity, so that when it abuts against the sealing portion 11, it fits more tightly, which is beneficial to further improve the sealing performance. In some embodiments, the first sealing member 40 is in interference fit with the first mounting groove 221 to improve the installation stability of the first sealing member 40.

[0055] In an embodiment, as shown in FIG. 4, in this embodiment, the first sealing member 40 is provided with a sealing corner 111, and the sealing portion 11 is provided with a sealing taper surface 41. When the first sealing member 40 abuts against the sealing portion 11, the sealing corner 111 can be deformed and abut against the sealing taper surface 41 to form a surface seal. At this time, under the action of the driving member 60, the sealing corner 111 of the first sealing member 40 and the sealing taper surface 41 of the sealing portion 11 are in close contact. Since the first sealing member 40 has a certain elasticity, the first sealing member 40 can be deformed under force and form a surface seal.

[0056] In another embodiment, as shown in FIG. 6, the first sealing member 40 is provided with a sealing taper surface 41, and the sealing portion 11 is provided with a sealing corner 111, when the first sealing member 40 is in abutting cooperation with the sealing portion 11, the sealing corner 111 is in abutment with the sealing taper surface 41 and forms a linear seal. At this time, since the rigidity of the sealing portion 11 is relatively large, when the first sealing member 40 and the sealing portion 11 cooperate, linear contact can be formed between the sealing corner 111 and the sealing taper surface 41 and linear sealing can be achieved.

[0057] Further, when the sealing taper surface 41 is provided on the first sealing member 40, for example, the end of the valve head portion 22 close to the valve stem portion 21 is tapered, at this time, the sealing taper surface 41 can be flush with the outer side surface of the end of the valve head portion 22 close to the valve stem portion 21, thereby avoiding the first sealing member 40 hindering the flow of refrigerant, reducing the probability of turbulent flow of refrigerant due to impact on the first sealing member 40, thereby reducing the flow resistance of the refrigerant.

[0058] Of course, in other embodiments, the side surface of the end of the valve head portion 22 close to the valve stem portion 21 can be directly used for hard sealing cooperation with the sealing portion 11, as long as the same sealing effect can be achieved.

[0059] In an embodiment, as shown in FIG. 7, the stop valve 100 further comprises a valve nozzle 70 and a valve core 71, the valve nozzle 70 is connected to the peripheral side of the valve body 10, and the valve nozzle 70 is provided with a mounting cavity 701 communicating with the fluid passage 101, and the valve core 71 is arranged in the mounting cavity 701, for filling refrigerant into the fluid passage 101. In this way, the amount of refrigerant in the pipeline can be adjusted.

[0060] Of course, the stop valve 100 can also not be provided with the valve nozzle 70 and the valve core 71, that is, the structure of the valve core 20, the valve body 10, the elastic member 30 and the driving member 60 and other components of the present application can not only be applied to the stop valve 100 with the valve nozzle 70, but also be applied to the stop valve 100 without the valve nozzle 70, and the application scenarios are more extensive.

[0061] Referring to FIGS. 8-11, in another embodiment, the valve core 20 provided by the present application includes a valve stem portion 21, a valve head portion 22, and a limiting portion 23. The valve head portion 22 is arranged in the fluid passage 101 and located on the side of the sealing portion 11 away from the mounting hole 102. One end of the valve stem portion 21 is connected to the valve head portion 22, and the other end extends out of the limiting opening 103 and is connected to the limiting portion 23 through the mounting hole 102, and the valve core 20 and the valve body 10 are movably connected. The elastic member 30 is arranged outside the fluid passage 101 and sleeved on the outer periphery of the valve stem portion 21, and one end of the elastic member 30 abuts against the limiting portion 23, and the other end abuts against the end face of the valve body 10 provided with the limiting opening 103. The driving member 60 is connected to the valve body 10, and the output end of the driving member 60 is stopped against the end face of the limiting portion 23 away from the valve stem portion 21. When the driving member 60 is energized, the driving member 60 can push the limiting portion 23 to move towards the limiting opening 103, and drive the valve stem portion 21 and the valve head portion 22 to move synchronously, so that the valve head portion 22 is away from the sealing portion 11 and the fluid passage 101 is open, and the elastic member 30 is in a compressed state. When the driving member 60 is de-energized, the elastic member 30 pushes the limiting portion 23 to move away from the limiting opening 103 under the action of the elastic force, so that the valve head portion 22 abuts against the sealing portion 11 and is sealingly connected with the sealing portion 11.

[0062] It can be understood that, when the stop valve 100 is not subjected to other external forces, i.e., only subjected to the action of the elastic member 30, the force applied by the elastic member 30 on the limiting portion 23 can be transmitted to the valve head portion 22 through the valve stem portion 21, so that the valve head portion 22 has a movement trend towards the sealing portion 11, thereby realizing the sealing connection between the valve head portion 22 and the sealing portion 11. Further, the stop valve 100 drives the valve core 20 to move to a predetermined position by the force applied by the driving member 60 on the valve core 20, so that the valve head portion 22 is away from the sealing portion 11, thereby realizing the opening of the fluid passage 101, and satisfying the smooth flow of the refrigerant. At this time, the elastic member 30 is compressed under the action of the force. When the air conditioning system is suddenly de-energized, the force applied by the driving member 60 on the valve core 20 disappears, and the valve head portion 22 can be automatically reset and tightly connected with the sealing portion 11 under the action of the elastic member 30, thereby realizing the interruption of the fluid passage 101. In this way, the probability of refrigerant leakage under the de-energized working condition can be effectively reduced, thereby greatly improving the safety of the stop valve 100 and the air conditioning system. Moreover, the valve core 20 and the valve body 10 are directly connected and movably connected, compared with the related art, the present application cancels the remaining components arranged between the valve core 20 and the valve body 10, greatly simplifies the structure of the stop valve 100, and effectively improves the machining and assembly efficiency of the stop valve 100. Meanwhile, the driving member 60 can be directly connected to the valve body 10, and the output end thereof only needs to be abutted and connected with the limiting portion 23, and the overall connection is simpler, thereby greatly reducing the cost of the stop valve 100.

[0063] In an embodiment, the limiting portion 23 is a rivet forming structure, that is, the limiting portion 23 can be formed by riveting the portion of the valve stem portion 21 protruding from the limiting opening 103, and the elastic member 30 can be sleeved before the forming of the limiting portion 23, so as to reduce the assembly difficulty of the elastic member 30 and realize the cooperation between the valve core 20 and the valve body 10.

[0064] In an embodiment, the valve stem portion 21 and the valve head portion 22 are integrally formed, so as to further improve the structural strength of the valve core 20 as a whole.

[0065] In an embodiment, as shown in FIG. 8, the end of the valve head portion 22 away from the valve stem portion 21 is arranged as a plane. Generally, the air conditioning system is mostly operated in refrigeration, that is, the refrigerant flows into the first passage 1012 and flows out of the second passage 1013. At this time, the refrigerant flow will generate a certain impact on the valve core 20. Based on this, when the stop valve 100 is closed, since the side of the valve head portion 22 in contact with the refrigerant during refrigeration is a plane, the contact area with the refrigerant is increased, so that the valve head portion 22 can receive greater flow pressure, and under the action of the pressure, the cooperation between the valve head portion 22 and the sealing portion 11 is more tight, thereby greatly enhancing the sealing performance of the stop valve 100 in the closed state and improving the safety.

[0066] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0067] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as the limitation of the patent application scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A stop valve characterized by comprising: The valve includes a valve body, a valve core, an elastic member and a driving member, the valve body is provided with a fluid passage and a limiting opening communicating with the fluid passage, and a sealing portion is formed on the inner wall of the fluid passage; The valve core includes a valve rod portion and a valve head portion, the valve head portion is arranged in the fluid passage and located on the side of the sealing portion away from the limiting opening, one end of the valve rod portion is connected with the valve head portion, and the other end of the valve rod portion extends out of the limiting opening and penetrates through the fluid passage, and the valve rod portion is in clearance fit with the fluid passage; The elastic member is arranged in the fluid passage and sleeved on the outer periphery of the valve rod portion, one end of the elastic member abuts against the valve head portion, and the other end of the elastic member abuts against the inner wall of the fluid passage; The driving member is connected with one end of the valve rod portion extending out of the limiting opening, and the valve rod portion can move linearly in the direction away from the limiting opening in response to the action of the driving member, and drive the valve head portion to move synchronously, so that the valve head portion abuts against and is in sealing fit with the sealing portion and compresses the elastic member.

2. The stop valve according to claim 1, wherein Along the axial direction of the valve core, the valve head portion has a gradually expanding trend from the end away from the valve rod portion to the end close to the valve rod portion. Along the axial direction of the valve core, the valve head portion has a gradually expanding trend from the end close to the valve rod portion to the end away from the valve rod portion.

3. A stop valve characterized by The valve includes a valve body, a valve core, an elastic member and a driving member, the valve body is provided with a fluid passage and a limiting opening communicating with the fluid passage, and a sealing portion is formed in the fluid passage; The valve core includes a valve rod portion, a valve head portion and a limiting portion, the valve head portion is arranged in the fluid passage and located on the side of the sealing portion away from the limiting opening, one end of the valve rod portion is connected with the valve head portion, and the other end of the valve rod portion extends out of the limiting opening and is connected with the limiting portion, and the valve core is in movable fit with the valve body; The elastic member is arranged outside the fluid passage and sleeved on the outer periphery of the valve rod portion, one end of the elastic member abuts against the limiting portion, and the other end of the elastic member abuts against the end face of the valve body provided with the limiting opening; The driving member is connected with the valve body, and the output end of the driving member is stopped on the end face of the limiting portion away from the valve rod portion; When the driving member is energized, the driving member can drive the limiting portion to move in the direction close to the limiting opening and drive the valve rod portion and the valve head portion to move synchronously, so that the valve head portion is away from the sealing portion and the fluid passage is conducted, and the elastic member is in a compressed state; When the driving member is de-energized, the elastic member drives the limiting portion to move in the direction away from the limiting opening under the action of the elastic force, so that the valve head portion abuts against and is in sealing fit with the sealing portion.

4. The shut-off valve according to claim 3, wherein The end of the valve head portion away from the valve rod portion is arranged in a plane.

5. The stop valve according to any one of claims 1 to 4, wherein The stop valve further includes a first sealing member, the outer periphery of the side of the valve head portion close to the valve rod portion is provided with a first installation groove recessed in the direction close to the axis, and the first sealing member is at least partially installed in the first installation groove. The first sealing member is capable of moving towards the sealing part under the driving of the valve head and abutting against the sealing part to form a soft seal.

6. The stop valve according to claim 5, wherein One of the first sealing member and the sealing part is provided with a sealing taper surface, and the other is provided with a sealing corner, and the sealing corner is capable of abutting against the sealing taper surface to form a soft seal.

7. The shut-off valve according to claim 5, wherein The first sealing member is a plastic member or a rubber member.

8. The stop valve according to any one of claims 1 to 4, wherein The valve body is also provided with a mounting hole, two ends of the mounting hole are respectively communicated with the fluid channel and the limiting opening; The outer side wall of the valve rod part is provided with a second mounting groove recessed towards the axis direction, the stop valve further comprises a second sealing member, the second sealing member is installed in the second mounting groove, and the valve rod part is in axial movable sealing cooperation with the inner wall of the mounting hole through the second sealing member.

9. The shut-off valve according to claim 8, wherein, The number of the second sealing members is multiple, and the multiple second sealing members are arranged in the axial direction of the valve core. The second mounting groove and the second sealing member are one-to-one corresponding.

10. The stop valve according to claim 1, wherein The output end of the driving member is connected with a push-pull rod for driving the movement of the push-pull rod in the axial direction of the valve core. The valve core further comprises a limiting part, the limiting part is connected to one end of the valve rod part away from the valve head, and the limiting part protrudes from the circumferential side of the valve rod part in the radial direction of the valve core. The end of the push-pull rod is recessed in the axial direction to form a clamping groove, and the limiting part extends into the clamping groove and is clamped and cooperated with the clamping groove.

11. The shut-off valve according to claim 3 or 4, wherein The driving member comprises a driving body and a push-pull rod, the driving body is sleeved on one end of the valve body and is threadedly connected with the valve body, and the output end of the driving body is connected with the push-pull rod and abuts against the end face of the limiting part away from the valve rod part through the push-pull rod.

12. The shut-off valve according to claim 10 or 11, wherein The driving member further comprises an abutting part, when the driving body and the valve body are locked and connected, the abutting part is capable of abutting against the end face of the valve body and hard sealing cooperation with the valve body.

13. The stop valve according to any one of claims 1 to 12, wherein The stop valve further comprises a valve nozzle and a valve core, the valve nozzle is connected to the circumferential side of the valve body, and the valve nozzle is provided with a mounting cavity communicated with the fluid channel, and the valve core is installed in the mounting cavity for filling refrigerant into the fluid channel.

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