Stop valve

Abstract

The utility model relates to the technical field of valves, in particular to a stop valve. The stop valve comprises a valve body, a valve element, an elastic piece and a push-pull type driving piece, the valve body is provided with a fluid channel and a limiting opening, and a sealing part is formed on the inner wall of the fluid channel. The valve element comprises a valve rod part and a valve head part, and the valve head part is arranged in the fluid channel and located on the side, away from the limiting opening, of the sealing part. One end of the valve rod part is connected with the valve head part; the elastic piece is arranged in the fluid channel and arranged on the periphery of the valve rod part in a sleeving mode, one end of the elastic piece abuts against the valve head part, and the other end of the elastic piece abuts against the inner wall of the fluid channel. The valve rod part can respond to the action of the push-pull type driving part to linearly move in the direction away from the limiting opening and drive the valve head part to synchronously move, so that the valve head part abuts against the sealing part and is in sealing fit with the sealing part, and the elastic part is compressed. According to the stop valve, the problem that an existing stop valve is low in closing speed is solved.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a stop valve. Background Art

[0002] Air conditioning systems are often equipped with stop valves to cut off the pipeline when the air conditioning system leaks or needs maintenance, thereby preventing refrigerant leakage and improving safety. In particular, some existing refrigerants are slightly flammable and large-scale leakage may cause serious safety accidents.

[0003] In the related art, the stop valve usually includes a valve body and a valve core. The valve core moves in the valve body and closes the stop valve when it is sealed with the valve port. However, the valve core and the valve body are usually threaded, which has a slow response speed and is difficult to meet the working conditions that require rapid refrigerant cutoff, and the safety is insufficient. Utility Model Content

[0004] Based on this, it is necessary to provide a stop valve to solve the problem of slow closing speed of the existing stop valve.

[0005] The present application provides a stop valve, which includes a valve body, a valve core, an elastic member and a push-pull type driving member, wherein the valve body is provided with a fluid channel and a limit opening communicating with the fluid channel, and a sealing portion is formed on the inner wall of the fluid channel; the valve core includes a valve stem and a valve head, wherein the valve head is arranged in the fluid channel and is located on a side of the sealing portion away from the limit opening; one end of the valve stem is connected to the valve head, and the other end passes through the fluid channel and extends out of the limit opening, and the valve stem is in clearance fit with the fluid channel; the elastic member is arranged in the fluid channel and sleeved on the outer periphery of the valve stem, and one end of the elastic member abuts against the valve head, and the other end abuts against the inner wall of the fluid channel; the push-pull type driving member is connected to one end of the valve stem extending out of the limit opening, and the valve stem can move linearly in a direction away from the limit opening in response to the action of the push-pull type driving member, and drive the valve head to move synchronously, so that the valve head abuts against the sealing portion and seals with the sealing portion, and compresses the elastic member.

[0006] In one embodiment, along the axial direction of the valve core, the valve head portion tends to gradually expand from an end away from the valve stem portion toward a direction close to the valve stem portion; and / or, along the axial direction of the valve core, the valve head portion tends to gradually expand from an end close to the valve stem portion toward a direction away from the valve stem portion.

[0007] In one embodiment, the stop valve also includes a first sealing member, and a first installation groove which is recessed toward the axial direction is formed on the outer periphery of the valve head portion close to the valve stem portion, and the first sealing member is at least partially installed in the first installation groove; wherein, the first sealing member can move toward the sealing portion under the drive of the valve head portion, and abut against the sealing portion to form a soft seal.

[0008] In one embodiment, a sealing cone is provided on the first sealing member, and a sealing corner is provided on the sealing portion. When the first sealing member abuts against the sealing portion, the sealing corner abuts against the sealing cone to form a line seal.

[0009] In one embodiment, the first seal is provided with a sealing corner, and the sealing portion is provided with a sealing cone surface. When the first seal is abutted against the sealing portion, the sealing corner can be deformed and abut against the sealing cone surface to form a surface seal.

[0010] In one embodiment, the first sealing member is a plastic member or a rubber member.

[0011] In one embodiment, the valve body is further provided with a mounting hole, and the two ends of the mounting hole are respectively connected to the fluid channel and the limit opening; the outer wall of the valve stem portion is provided with a second mounting groove recessed toward the axial direction, and the stop valve also includes a second sealing member, which is installed in the second mounting groove, and the valve stem portion is sealed with the inner wall of the mounting hole along the axial direction of the valve core through the second sealing member.

[0012] In one embodiment, there are multiple second sealing members, and the multiple second sealing members are arranged at intervals along the axial direction of the valve core; wherein the second mounting grooves and the number of the second sealing members are arranged in a one-to-one correspondence.

[0013] In one embodiment, the output end of the push-pull drive member is connected to a push-pull rod for driving the push-pull rod to move axially along the valve core; the valve core also includes a limiting portion, the limiting portion is connected to an end of the valve stem portion away from the valve head portion, and the limiting portion protrudes from the circumferential side of the valve stem portion along the radial direction of the valve core; wherein the end of the push-pull rod is axially recessed to form a clamping groove, the limiting portion extends into the clamping groove and is clamped and matched with the clamping groove.

[0014] In one embodiment, the stop valve also includes a valve nozzle and a valve core, the valve nozzle is connected to the peripheral side of the valve body, and an installation cavity connected to the fluid channel is opened in the valve nozzle, and the valve core is installed in the installation cavity for filling refrigerant into the fluid channel.

[0015] Compared with the prior art, the stop valve provided by the present application, by sleeved with an elastic member on the outer periphery of the valve stem of the valve core, uses the elastic member to support the valve head, can prevent the valve head from being impacted by the refrigerant and the like and moving toward a position close to the sealing portion, thereby causing the fluid channel to be cut off, thus realizing the circulation function of the stop valve under normal conditions. At the same time, by applying an axial movement force to the valve stem through a push-pull drive member, so that it is away from the limit opening, it can drive the entire valve core to move, and when the valve head moves to seal against the sealing portion, the fluid channel is cut off, the entire movement process is a straight line match along the axial direction, the stroke is short, and the response speed is fast. Compared with the traditional threaded rotation structure, it can realize the rapid cutoff of the fluid channel, thereby further reducing the probability of refrigerant leakage. In addition, due to the elastic support of the elastic part, the stop valve is in a normally open state under normal working conditions. Therefore, it is only necessary to apply force to the valve stem to move the valve core when closing the stop valve. That is, it is only necessary to open the push-pull drive part when closing the stop valve, which is conducive to reducing energy consumption and adopts fewer operating steps, which can effectively reduce the overall control difficulty and control cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a stop valve according to an embodiment of the present application;

[0018] Figure 2 A cross-sectional view of a stop valve in an open state according to an embodiment of the present application;

[0019] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0021] Figure 5 A cross-sectional view of a stop valve in a closed state according to an embodiment of the present application;

[0022] Figure 6 A cross-sectional view of a stop valve in an open state according to another embodiment of the present application;

[0023] Figure 7 A cross-sectional view of a stop valve in an open state according to another embodiment of the present application.

[0024] The symbols in the figure mean the following:

[0025] 100, stop valve; 10, valve body; 101, fluid channel; 1011, valve cavity; 1012, first channel; 1013, second channel; 1014, valve port; 102, mounting hole; 103, limiting opening; 11, sealing portion; 111, sealing corner; 20, valve core; 21, valve stem; 211, second mounting groove; 22, valve head; 221, first mounting groove; 23, limiting portion; 30, elastic member; 40, first sealing member; 41, sealing cone; 50, second sealing member; 60, push-pull drive member; 61, push-pull rod; 611, clamping groove; 62, abutting portion; 70, valve nozzle; 701, mounting cavity; 71, valve core. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. 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 implementation method.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments 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 related listed items.

[0031] Air conditioning systems are often equipped with stop valves to cut off the pipeline when the air conditioning system leaks or needs maintenance, thereby preventing refrigerant leakage and improving safety. In particular, some existing refrigerants are slightly flammable and large-scale leakage may cause serious safety accidents.

[0032] In the related art, the stop valve usually includes a valve body and a valve core. The valve core moves in the valve body and closes the stop valve when it is sealed with the valve port. However, the valve core and the valve body are usually threaded, which has a slow response speed and is difficult to meet the working conditions that require rapid refrigerant cutoff, and the safety is insufficient.

[0033] See also Figure 1-Figure 7 In order to solve the problem of slow closing speed of the existing 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 push-pull driving member 60. The valve body 10 is provided with a fluid channel 101, a limit opening 103 and a mounting hole 102 connecting the fluid channel 101 and the limit opening 103. The inner wall of the fluid channel 101 is formed with a sealing portion 11.

[0034] Specifically, the fluid channel 101 includes a first channel 1012, a second channel 1013, and a valve cavity 1011 connecting the first channel 1012 and the second channel 1013, wherein the position where the valve cavity 1011 and the first channel 1012 are connected is the valve port 1014 of the stop valve 100, and the sealing portion 11 is arranged at the position of the valve port 1014, so as to cooperate with the valve core 20 to achieve sealing when the valve port 1014 is closed. Further, the first channel 1012 and the second channel 1013 are arranged at an angle, and the present application is preferably arranged so that the first channel 1012 and the second channel 1013 are perpendicular to each other, and the axial direction of the first channel 1012 is parallel to or coincides with the axial direction of the valve core 20.

[0035] Generally, the air conditioning system has two working conditions, refrigeration and heating, and in the refrigeration and heating working conditions, the flow direction of the refrigerant in the stop valve 100 is opposite. For example, in the stop valve 100 provided in the present application, under the refrigeration working condition, the refrigerant enters the valve cavity 1011 from the first channel 1012 and flows out from the second channel 1013, and under the heating working condition, the refrigerant enters the valve cavity 1011 from the second channel 1013 and flows out from the first channel 1012, and the present application will be described as an example later. Of course, in other embodiments, the flow direction of the refrigerant under the refrigeration and heating working conditions can also be changed accordingly, that is, under the heating working condition, the refrigerant enters the valve cavity 1011 from the first channel 1012 and flows out from the second channel 1013, and under the refrigeration working condition, the refrigerant enters the valve cavity 1011 from the second channel 1013 and flows out from the first channel 1012.

[0036] Please continue reading Figure 2-Figure 5 The valve core 20 provided in the present application includes a valve stem 21, a valve head 22 and a limiting portion 23. The valve head 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 21 is connected to the valve head 22, and the other end passes through the fluid channel 101 and the mounting hole 102 and extends out of the limiting opening 103 and is connected to the limiting portion 23, and the valve stem 21 and the fluid channel 101 are clearance-matched. Further, the elastic member 30 is arranged in the fluid channel 101 and sleeved on the outer periphery of the valve stem 21, and one end of the elastic member 30 abuts against the valve head 22, and the other end abuts against the inner wall of the fluid channel 101 near one end of the mounting hole 102. The push-pull drive member 60 is connected to one end of the valve stem portion 21 extending out of the limit opening 103, and the valve stem portion 21 can respond to the action of the push-pull drive member 60 to move linearly in a direction away from the limit opening 103, and drive the valve head portion 22 to move synchronously, so that the valve head portion 22 abuts against the sealing portion 11 and seals with the sealing portion 11, and compresses the elastic member 30.

[0037] It is understandable that, by sleeve-arranging the elastic member 30 on the outer periphery of the valve stem 21 of the valve core 20, the elastic member 30 is used to support the valve head 22, so as to prevent the valve head 22 from being impacted by the refrigerant and the like and moving toward the position close to the sealing portion 11, thereby causing the fluid channel 101 to be cut off, thus realizing the circulation function of the stop valve 100 under normal conditions. At the same time, by applying an axial movement force to the valve stem 21 through the push-pull drive member 60, so as to make it away from the limit opening 103, the valve core 20 can be driven to move as a whole, and when the valve head 22 moves to seal against the sealing portion 11, the fluid channel 101 is cut off, and the entire movement process is a straight line match along the axial direction, with a short stroke and a fast response speed. Compared with the traditional threaded rotation structure, the fluid channel 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 a normally open state under normal working conditions. Therefore, it is only necessary to apply a force to the valve stem portion 21 to move the valve core 20 when closing the stop valve 100. That is, it is only necessary to open the push-pull drive member 60 when closing the stop valve 100, which is beneficial to reducing energy consumption and adopts fewer operating steps, which can effectively reduce the overall control difficulty and control cost.

[0038] It should be noted that the push-pull drive member 60 is a structure in which the output shaft directly moves along the axial direction and does not generate rotation. Optionally, the push-pull drive member 60 can be a linear motor, a driving cylinder or a driving oil cylinder.

[0039] Specifically, the output end of the push-pull type driving member 60 of the present application is connected to the limiting portion 23. The limiting portion 23 protrudes from the circumference of the valve stem portion 21 along the radial direction of the valve core 20, and the limiting portion 23 can cooperate with the limiting opening 103 stopper to achieve the limiting of 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. Preferably, the limiting portion 23 can be formed by flattening the portion of the valve stem portion 21 protruding from the limiting opening 103 by riveting, which is simple to form and can reduce the difficulty of assembling the valve core 20 and the elastic member 30 as a whole.

[0040] Furthermore, the valve body 10 in this embodiment is an integrated structure, which greatly simplifies the structure of the valve body 10, reduces the number of parts, and thus reduces the cost. At this time, the axis of the first channel 1012, the mounting hole 102, and the limit opening 103 can be coaxially arranged with the axis of the valve core 20 to facilitate the installation of the valve core 20.

[0041] To further improve the reliability of closing the stop valve 100, in one embodiment, Figure 2 and Figure 3As shown, the output end of the push-pull driving member 60 is connected to a push-pull rod 61, which is used to drive the push-pull rod 61 to move along the axial direction of the valve core 20. The end of the push-pull rod 61 is recessed along the axial direction to form a clamping groove 611, and the limiting portion 23 extends into the clamping groove 611 and is clamped and matched with the clamping groove 611.

[0042] In this way, when the air conditioning system detects internal leakage, the push-pull drive 60 can be used to drive the valve core 20 to move quickly, which is simple to operate, and the overall response speed is faster, and automatic control can be achieved, which is safer. In addition, when the repair is completed, the push-pull drive 60 can be closed, and the valve head 22 can automatically move in the direction away from the sealing part 11 due to the elastic recovery effect of the elastic member 30, thereby opening the valve port 1014 and achieving normal circulation of the refrigerant. In addition, when the refrigerant circulates normally, the push-pull drive 60 can usually be kept in a closed state, thereby saving energy and reducing energy consumption costs. Of course, the push-pull drive 60 can also be started, and the power adjustment of the push-pull drive 60 is coordinated with the elastic force of the elastic member 30, the length of the valve stem 21, etc., so as to adjust the opening size of the stop valve 100 to meet the flow requirements under different working conditions.

[0043] Specifically, the push-pull drive member 60 is connected to the valve body 10 by a threaded connection, so that the tightening is achieved by torque, the disassembly is quick, the connection is simple, and the reliability of the connection of the push-pull drive member 60 can be ensured. At the same time, in order to improve the sealing between the push-pull drive member 60 and the valve body 10, Figure 3 As shown, an abutment portion 62 is provided on the push-pull driving member 60, so that when the push-pull driving member 60 and the valve body 10 are tightened, the abutment portion 62 abuts against the end surface of the valve body 10 where the limiting opening 103 is provided, thereby achieving hard sealing.

[0044] To further reduce the probability of refrigerant leakage from the limiting opening 103, in one embodiment, Figure 3 As shown, the outer wall of the valve stem 21 is provided with a second mounting groove 211 which is recessed toward the axial direction. The stop valve 100 further includes a second sealing member 50 which is installed in the second mounting groove 211, and the valve stem 21 is movably sealed with the inner wall of the mounting hole 102 along the axial direction of the valve core 20 through the second sealing member 50.

[0045] The second sealing member 50 may be configured as an O-ring and made of materials such as plastic or rubber to ensure that the second sealing member 50 has good sealing performance.

[0046] Further, in one embodiment, there are multiple second sealing members 50, and the multiple second sealing members 50 are arranged at intervals along the axial direction of the valve core 20. The second installation grooves 211 and the number of second sealing members 50 are arranged in a one-to-one correspondence.

[0047] By providing multiple second sealing members 50, not only can the sealing performance be further improved, but it is also beneficial to achieve the positioning of the valve stem 21, ensure the verticality of the valve stem 21, and effectively prevent the valve stem 21 from being skewed by the impact of the refrigerant. In this embodiment, two second sealing members 50 are specifically provided to reduce the difficulty of the provision. Of course, in other embodiments, the number of the second sealing members 50 can also be three or four, etc., which can be reasonably provided according to actual needs.

[0048] In one embodiment, if Figure 4 As shown, along the axial direction of the valve core 20, the valve head 22 tends to gradually expand from the end away from the valve stem portion 21 toward the direction close to the valve stem portion 21. In this way, the surface of the valve head 22 can play a certain buffering role, so that when the refrigerant entering from the first channel 1012 impacts the valve head 22, it can flow through the surface of the valve head 22, thereby reducing the impact pressure on the valve head 22, improving the overall stability of the valve core 20, and further reducing the load on the push-pull drive member 60 and the elastic member 30.

[0049] In another embodiment, if Figure 4 As shown, along the axial direction of the valve core 20, the valve head 22 tends to gradually expand from one end close to the valve stem 21 toward a direction away from the valve stem 21. In this way, the surface of the valve head 22 can also be used to play a certain buffering role, so that when the refrigerant entering from the second channel 1013 impacts 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 overall stability of the valve core 20.

[0050] In yet another embodiment, Figure 4 As shown, both axial ends of the valve head 22 tend to gradually expand from the end toward the middle position, so that the refrigerant flowing in the opposite direction in the cooling or heating mode can be buffered by the surface of the valve head 22, further ensuring the stability of the installation of the valve core 20.

[0051] Specifically, the end of the valve head portion 22 close to the valve stem portion 21 and / or the end of the valve head portion 22 away from the valve stem portion 21 can be configured to be conical or semi-elliptical, etc., as long as the same effect can be achieved.

[0052] In one embodiment, if Figure 4As shown, the stop valve 100 further includes a first sealing member 40, and a first mounting groove 221 which is recessed toward the axis direction is provided on the outer periphery of the valve head 22 near the valve stem 21, and the first sealing member 40 is at least partially mounted in the first mounting groove 221. The first sealing member 40 can move toward the sealing portion 11 driven by the valve head 22, 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 can be better ensured when the stop valve 100 is closed.

[0053] Specifically, in one embodiment, the first sealing member 40 is a plastic member or a rubber member, so that the first sealing member 40 has a certain elasticity, so that when it abuts against the sealing portion 11, the fit is tighter, which is conducive to further improving the sealing performance. The first sealing member 40 is preferably interference fit with the first installation groove 221 to improve the installation stability of the first sealing member 40.

[0054] In one embodiment, if Figure 4 As shown, 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 conical surface 41. When the first sealing member 40 is in contact with the sealing portion 11, the sealing corner 111 can be deformed and abut against the sealing conical surface 41 to form a surface seal. At this time, under the action of the push-pull driving member 60, the sealing corner 111 of the first sealing member 40 and the sealing conical 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.

[0055] In another embodiment, if Figure 6 As shown, the first seal 40 is provided with a sealing cone 41, and the sealing portion 11 is provided with a sealing corner 111. When the first seal 40 and the sealing portion 11 are in contact with each other, the sealing corner 111 is in contact with the sealing cone 41 to form a line seal. At this time, due to the high rigidity of the sealing portion 11, when the first seal 40 and the sealing portion 11 are in contact with each other, a linear contact can be formed between the sealing corner 111 and the sealing cone 41 to achieve a line seal.

[0056] Furthermore, when the sealing cone surface 41 is provided on the first sealing component 40, taking the example of setting the end of the valve head portion 22 close to the valve stem portion 21 as a cone, at this time, the sealing cone surface 41 can be set 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 component 40 from obstructing the flow of the refrigerant, reducing the probability of the refrigerant generating turbulence due to colliding with the first sealing component 40, and thus reducing the flow resistance of the refrigerant.

[0057] Of course, in other embodiments, the side surface of the valve head portion 22 close to one end of the valve stem portion 21 may be directly used to cooperate with the sealing portion 11 for hard sealing, as long as the same sealing effect can be achieved.

[0058] In one embodiment, if Figure 7 As shown, the stop valve 100 further includes a valve 70 and a valve core 71. The valve 70 is connected to the peripheral side of the valve body 10, and a mounting cavity 701 communicating with the fluid channel 101 is provided in the valve 70. The valve core 71 is installed in the mounting cavity 701 for filling the fluid channel 101 with refrigerant. In this way, the amount of refrigerant in the pipeline can be adjusted.

[0059] Of course, the stop valve 100 may not be provided with the valve nozzle 70 and the valve core 71, that is, the structure of the valve core 20, valve body 10, elastic member 30 and push-pull drive member 60 and other components of the present application can not only be applied to the stop valve 100 with a valve nozzle 70, but also can be applied to the stop valve 100 without a valve nozzle 70 structure, and the application scenario is broader.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A stop valve, characterized in that: The valve body (10) comprises a valve body (10), a valve core (20), an elastic member (30) and a push-pull driving member (60); the valve body (10) is provided with a fluid channel (101) and a limit opening (103) connected to the fluid channel (101); and the inner wall of the fluid channel (101) is formed with a sealing portion (11); The valve core (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 a side of the sealing portion (11) away from the limit opening (103); one end of the valve stem portion (21) is connected to the valve head portion (22), and the other end passes through the fluid channel (101) and extends out of the limit opening (103), and the valve stem portion (21) and the fluid channel (101) are clearance-matched; The elastic member (30) is arranged in the fluid channel (101) and sleeved on the outer periphery of the valve stem (21), and one end of the elastic member (30) abuts against the valve head (22), and the other end abuts against the inner wall of the fluid channel (101); The push-pull drive member (60) is connected to one end of the valve stem portion (21) extending out of the limit opening (103), and the valve stem portion (21) can respond to the action of the push-pull drive member (60) to move linearly in a direction away from the limit opening (103), and drive the valve head portion (22) to move synchronously, so that the valve head portion (22) abuts against the sealing portion (11) and seals with the sealing portion (11), and compresses the elastic member (30).

2. The stop valve according to claim 1, characterized in that: Along the axial direction of the valve core (20), the valve head portion (22) has a tendency to gradually expand from an end away from the valve stem portion (21) toward a direction close to the valve stem portion (21); And / or, along the axial direction of the valve core (20), the valve head portion (22) has a tendency to gradually expand from an end close to the valve stem portion (21) toward a direction away from the valve stem portion (21).

3. The stop valve according to claim 1, characterized in that: The stop valve further comprises a first sealing member (40); a first installation groove (221) is provided on the outer periphery of the valve head portion (22) on a side close to the valve stem portion (21) and is recessed towards the axis direction; the first sealing member (40) is at least partially installed in the first installation groove (221); Wherein, the first sealing member (40) can be moved towards the sealing portion (11) under the drive of the valve head (22), and abut against the sealing portion (11) to form a soft seal.

4. The stop valve according to claim 3, characterized in that: The first sealing member (40) is provided with a sealing cone surface (41), and the sealing portion (11) is provided with a sealing corner (111); when the first sealing member (40) and the sealing portion (11) are in abutment with each other, the sealing corner (111) abuts against the sealing cone surface (41) to form a line seal.

5. The stop valve according to claim 3, characterized in that: The first sealing member (40) is provided with a sealing corner (111), and the sealing portion (11) is provided with a sealing conical surface (41). When the first sealing member (40) is in abutment with the sealing portion (11), the sealing corner (111) can be deformed and abut against the sealing conical surface (41) to form a surface seal.

6. The stop valve according to claim 3, characterized in that: The first sealing component (40) is a plastic component or a rubber component.

7. The stop valve according to claim 1, characterized in that: The valve body (10) is further provided with a mounting hole (102), and two ends of the mounting hole (102) are respectively connected to the fluid channel (101) and the limit opening (103); The outer side wall of the valve stem portion (21) is provided with a second mounting groove (211) which is recessed toward the axial direction. The stop valve also includes a second sealing member (50). The second sealing member (50) is installed in the second mounting groove (211). The valve stem portion (21) is sealably matched with the inner wall of the mounting hole (102) along the axial direction of the valve core (20) through the second sealing member (50).

8. The stop valve according to claim 7, characterized in that: The number of the second sealing members (50) is plural, and the plurality of the second sealing members (50) are arranged at intervals along the axial direction of the valve core (20); Wherein, the number of the second mounting grooves (211) and the number of the second sealing members (50) are arranged in one-to-one correspondence.

9. The stop valve according to claim 1, characterized in that: The output end of the push-pull driving member (60) is connected to a push-pull rod (61) for driving the push-pull rod (61) to move along the axial direction of the valve core (20); The valve core (20) further comprises a limiting portion (23), the limiting portion (23) being connected to an end of the valve stem portion (21) away from the valve head portion (22), and the limiting portion (23) protrudes from the circumferential side of the valve stem portion (21) along the radial direction of the valve core (20); The end of the push-pull rod (61) is recessed along the axial direction to form a clamping groove (611), and the limiting portion (23) extends into the clamping groove (611) and is clamped and matched with the clamping groove (611).

10. The stop valve according to any one of claims 1 to 9, characterized in that: The stop valve also includes a valve nozzle (70) and a valve core (71), wherein the valve nozzle (70) is connected to the peripheral side of the valve body (10), and an installation cavity (701) connected to the fluid channel (101) is provided in the valve nozzle (70), and the valve core (71) is installed in the installation cavity (701) for filling the fluid channel (101) with refrigerant.

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