CN217977422U

CN217977422U - Stop valve

Info

Publication number: CN217977422U
Application number: CN202221674476.XU
Authority: CN
Inventors: 周峰; 楼峰; 冯光华
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-12-06
Anticipated expiration: 2032-06-30

Abstract

The application relates to the technical field of refrigeration, in particular to a stop valve. The stop valve comprises a valve body, a valve core and a connecting block, wherein the valve body is provided with a first opening and a second opening; the valve core is at least partially positioned in the valve body and can move in the valve body so as to communicate or separate the first opening and the second opening; one end of the connecting block is positioned outside the valve body, the other end of the connecting block is fixedly connected with the end part of the valve body, and the valve core part extends into the connecting block and is in threaded fit with the connecting block; wherein, along the axis direction of case, the connecting block extends towards the valve body and is formed with the sealing, and when the stop valve was in full open mode, the case can be with the butt of sealing and form the line seal. The utility model has the advantages that: the connecting block is arranged outside the valve body, so that the size of the valve body is reduced, the connecting block can be matched with the valve core to form a sealing structure, and the sealing structure is not required to be additionally arranged, so that the cost of the stop valve is reduced.

Description

Stop valve

Technical Field

The application relates to the technical field of refrigeration, in particular to a stop valve.

Background

In air conditioning systems, shut-off valves are used to cut off and throttle the medium in the line in which they are located.

The existing stop valve structure comprises a valve body, a valve core and a connecting block, wherein the valve body is sleeved outside the connecting block and fixedly connected with the connecting block, and the valve core part extends into the connecting block and is in threaded connection with the connecting block so as to realize the movement of the valve core in the valve body and open and close the stop valve. But the valve body cover is established outside the connecting block and can lead to the size increase of valve body, and the material that processing needs increases to the cost of stop valve has been increased.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a shutoff valve that can reduce the cost.

A stop valve comprises a valve body, a valve core and a connecting block, wherein the valve body is provided with a first opening and a second opening; the valve core is at least partially positioned in the valve body, and the valve core can move in the valve body to communicate or block the first opening and the second opening; one end of the connecting block is positioned outside the valve body, the other end of the connecting block is fixedly connected with the end part of the valve body, and the valve core part extends into the connecting block and is in threaded fit with the connecting block; and when the stop valve is in a fully-opened state, the valve core can be abutted against the sealing part to form line sealing.

It can be understood that the connecting block is located outside the valve body, and compared with the existing valve body sleeve, the connecting block can reduce the size of the valve body, thereby reducing the consumption of materials and the cost of the stop valve. And can improve the screw thread intensity between connecting block and case to improve the holistic structural stability of stop valve. The sealing part can be matched with the valve core, the sealing performance of the stop valve is improved, and the valve core is limited.

In one embodiment, one side face, close to the valve body, of the sealing portion is fixedly connected with the inner side wall of the valve body, and one side face, far away from the valve body, of the sealing portion is arranged at an interval with the valve core.

So set up, can improve the joint strength between connecting block and valve body.

In one embodiment, a first tapered portion is formed in a protruding manner in a direction of the peripheral side of the valve element toward the inner wall of the valve body, and a tapered surface of the first tapered portion can abut against the sealing portion and form a line seal.

By this arrangement, the sealing performance can be improved.

In one embodiment, the stop valve further comprises a valve seat disposed in the valve body and located between the first opening and the second opening and connected to the valve body.

So set up, can play limiting displacement to the case to realize the switching of stop valve with the case cooperation.

In one embodiment, when the stop valve is in a closed state, one end of the valve core is connected with the connecting block, and the other end of the valve core abuts against the valve seat and is in hard sealing fit or soft sealing fit with the valve seat.

So set up, can improve the leakproofness of stop valve.

In one embodiment, one end of the valve core close to the valve seat is provided with a second conical part, part of the second conical part is positioned in the valve seat, and the conical surface of the second conical part can abut against the valve seat and form a line seal.

So set up, can improve the leakproofness of stop valve.

In one embodiment, the stop valve further comprises a first sealing element, a first groove is formed in one end, away from the connecting block, of the valve core, and the first sealing element is installed in the first groove; the end face, close to the valve core, of the valve seat is provided with a protruding portion protruding out of the valve seat, and the first sealing element is abutted to the protruding portion to form soft sealing.

So set up, can improve the leakproofness of stop valve.

In one embodiment, the first opening is arranged at one end of the valve body far away from the connecting block, the second opening is arranged at the periphery of the valve body, and the central axis of the first opening and the central axis of the second opening form a certain included angle; or, the first opening with the second opening all sets up in week side of valve body, just first open-ended axis with the second open-ended axis is parallel.

With this arrangement, the medium can flow through the shutoff valve.

In one embodiment, the stop valve further comprises a first connecting pipe and a second connecting pipe, the first connecting pipe is fixedly connected with the first opening, and the second connecting pipe is fixedly connected with the second opening; the valve body is of a tubular hollow structure, at least one flanging hole is formed in the peripheral side of the valve body, the flanging hole forms the second opening, and the first connecting pipe and the second connecting pipe are arranged at a certain included angle; or, the valve body is tubular hollow structure, week side of valve body is equipped with two at least flanging hole, the flanging hole forms first opening with the second opening, first open-ended axis with distance has between the open-ended axis of second, just first opening with the second opening sets up the different sides of valve body.

With this arrangement, the medium can flow through the shutoff valve.

In one embodiment, the stop valve further includes a first transition connection pipe and a second transition connection pipe, the first transition connection pipe is sleeved outside the first connection pipe, the second transition connection pipe is sleeved outside the second connection pipe, the first transition connection pipe and the first connection pipe are made of different materials, and the second transition connection pipe and the second connection pipe are made of different materials.

So set up, be convenient for with the welding of outside pipeline.

Compared with the prior art, the utility model provides a stop valve, outside locating the valve body with the connecting block, not only reduced the size of valve body to, the connecting block can also form seal structure with the case cooperation, need not establish seal structure in addition, thereby has reduced the cost of stop valve.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a stop valve according to a first embodiment and a second embodiment of the present disclosure.

Fig. 2 is a cross-sectional view of a shut-off valve according to a first embodiment of the present disclosure.

Fig. 3 is a sectional view of a shut-off valve according to a second embodiment of the present application in a closed state.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

Fig. 5 is a sectional view of the second embodiment of the present application in an open state.

Fig. 6 is a schematic structural diagram of a stop valve according to a third embodiment and a fourth embodiment provided in the present application.

Fig. 7 is a sectional view of a shutoff valve according to a third embodiment of the present application.

Fig. 8 is a cross-sectional view of a shutoff valve according to a fourth embodiment of the present application.

The symbols in the drawings represent the following meanings:

100. a stop valve; 10. a valve body; 11. a first opening; 12. a second opening; 13. flanging holes; 20. a valve core; 21. a first tapered portion; 22. a first groove; 23. a limiting part; 24. a second tapered portion; 25. mounting grooves; 30. connecting blocks; 31. a sealing part; 40. a valve seat; 41. a boss portion; 50. a first seal member; 60. a first adapter tube; 61. a first transition nozzle; 70. a second adapter tube; 71. a second transition nozzle; 80. a guide block; 90. a circumferential seal.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used in the description of the present application are for illustrative purposes only and do not represent the only embodiments.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present application provides a stop valve 100 installed in an air conditioning system. In an air conditioning system, the shut-off valve 100 is used to perform an important function of shutting off and throttling the medium in the pipeline in which it is located.

The existing stop valve structure comprises a valve body, a valve core and a connecting block, wherein the valve body is sleeved outside the connecting block and is fixedly connected with the connecting block, and the valve core is connected with the connecting block through threads to realize the movement of the valve core in the valve body, so that the stop valve is opened and closed. But the valve body cover is established outside the connecting block and can lead to the size increase of valve body, and the material that processing needs increases to the cost of stop valve has been increased.

In order to solve the above problem, referring to fig. 2 to 8, the stop valve 100 provided by the present application includes a valve body 10, a valve core 20, and a connecting block 30. The valve body 10 is provided with a first opening 11 and a second opening 12; the valve core 20 is at least partially positioned in the valve body 10, and the valve core 20 can move in the valve body 10 to communicate or block the first opening 11 and the second opening 12; one end of the connecting block 30 is positioned outside the valve body 10, the other end of the connecting block is fixedly connected with the end part of the valve body 10, and the valve core 20 extends into the connecting block 30 and is in threaded fit with the connecting block 30.

Compared with the stop valve 100 provided by the application, the existing stop valve has the advantages that when the cross-sectional area of the connecting block 30 is kept unchanged, the existing valve body is sleeved outside the connecting block, the size of the valve body is increased, and materials required by processing are increased. In the present application, the valve body 10 is formed by processing a pipe or a bar, a flanging hole 13 is formed in the side surface of the valve body 10, and the flanging hole 13 is connected with the connecting pipe. Connecting block 30 one end is located outside valve body 10, the other end and valve body 10 tip fixed connection to can reduce the diameter size of valve body 10, and then reduce the consumption of material, reduce stop valve 100's cost. Further, the strength of the thread between the connecting block 30 and the valve body 20 can be increased, and the structural stability of the entire stop valve 100 can be improved.

Referring to fig. 5, a sealing portion 31 is formed in the connecting block 30 extending toward the valve body 10 along the axial direction of the valve body 20. Specifically, one side of the sealing portion 31 close to the valve body 10 is fixedly connected to the inner side wall of the valve body 10, and one side of the sealing portion 31 far from the valve body 10 is spaced from the valve core 20. Sealing portion 31 offsets with the valve body 10 inside wall, can improve area of contact between the two to improve the joint strength between sealing portion 31 and valve body 10, and then improve the joint strength of connecting block 30 and valve body 10, increase the steadiness of connecting block 30.

When the shutoff valve 100 is in the fully open state, the valve body 20 can abut against the seal portion 31 and form a line seal. Specifically, the peripheral side of the valve core 20 protrudes toward the inner wall of the valve body 10 to form a first tapered portion 21, and the tapered surface of the first tapered portion 21 can abut against the sealing portion 31 and form a line seal, so that the reverse sealing performance of the connecting block 30 and the valve core 20 is improved, and the problem of medium leakage is avoided. Other sealing structures are not needed, so that the material cost is saved, and the processing and assembling difficulty is reduced.

The seal portion 31 can also limit the valve body 20 and control the maximum opening degree of the stop valve 100. During operation, when the valve body 20 is moved in the axial direction thereof toward the connecting block 30 to abut against the seal portion 31, the maximum opening degree of the stop valve 100 is defined.

The stop valve 100 further includes a valve seat 40, a first connection pipe 60, and a second connection pipe 70, wherein the valve seat 40 is disposed in the valve body 10, located between the first opening 11 and the second opening 12, and connected to the valve body 10. The first adapter tube 60 is fixedly connected to the first opening 11, and the second adapter tube 70 is fixedly connected to the second opening 12. The first connection pipe 60 is inserted into the first opening 11, and the first opening 11 is communicated with the air conditioning pipeline through the first connection pipe 60. The second connection pipe 70 is inserted into the second opening 12, and the second opening 12 is communicated with the air conditioning pipeline through the second connection pipe 70. The valve seat 40 can limit the movement of the valve core 20 in the direction away from the connecting block 30, and when the stop valve 100 is in the closed state, the valve core 20 abuts against the valve seat 40 and is matched with the valve seat 40 to realize sealing, so that the circulation of a medium between the first opening 11 and the second opening 12 is blocked. When the shutoff valve 100 is in the open state, the valve body 20 does not contact the valve seat 40, and the medium can flow between the first opening 11 and the second opening 12.

Further, the stop valve 100 further includes a guide block 80, the guide block 80 is located in the valve body 10 and connected to the valve body 10, the guide block 80 is disposed near the first opening 11 and the second opening 12 relative to the connecting block 30, the valve core 20 at least partially extends into the guide block 80, and the valve core 20 can move along a guide direction of the guide block 80 to connect or disconnect the first opening 11 and the second opening 12. The guide block 80 prevents the valve element 20 from being displaced in the valve body 10, and improves the sealing reliability between the valve element 20 and the valve seat 40.

Example one

Referring to fig. 1 and fig. 2, the first opening 11 is disposed at an end of the valve body 10 away from the connecting block 30, the second opening 12 is disposed at a peripheral side of the valve body 10, and a central axis of the first opening 11 and a central axis of the second opening 12 form an included angle. For example, the included angle may be set to 75 °, 90 °, 120 °, or the like. The valve body 10 is a tubular hollow structure, at least one flanging hole 13 is arranged on the periphery of the valve body 10, the flanging hole 13 forms a second opening 12, and the first connecting pipe 60 and the second connecting pipe 70 are arranged at a certain included angle. The first opening 11 and the second opening 12 each serve as an inlet or outlet for the medium, so that the medium can flow through the shut-off valve 100.

Specifically, the valve seat 40 is at least partially disposed in the valve body 10 through the first opening 11, and the first adapter tube 60 is inserted into the valve seat 40 and is fixedly connected to the valve seat 40. The periphery of the valve body 10 is provided with at least one flanging hole 13, and the flanging of the flanging hole 13 can increase the connection area between the valve body 10 and the second connecting pipe 70, so that the valve body 10 and the second connecting pipe 70 can be conveniently connected, and the connection strength between the valve body 10 and the second connecting pipe 70 is improved. When the shut-off valve 100 is opened, the medium enters the valve body 10 through the first opening 11 and flows out through the second opening 12. Alternatively, the medium enters the valve body 10 through the second opening 12 and exits through the first opening 11.

Referring to fig. 2, when the stop valve 100 is in the closed state, one end of the valve element 20 is connected to the connecting block 30, and the other end of the valve element 20 abuts against the valve seat 40 and is in hard sealing engagement with the valve seat 40.

Specifically, one end of the valve element 20 close to the valve seat 40 is formed with the second tapered portion 24, a portion of the second tapered portion 24 is located within the valve seat 40, and a tapered surface of the second tapered portion 24 can abut against the valve seat 40 and form a line seal. When the second tapered portion 24 of the valve body 20 abuts against the valve seat 40, the tapered surface of the second tapered portion 24 comes into linear contact with the valve seat 40 and is press-fitted to block the passage between the first opening 11 and the second opening 12. On one hand, the limit of the valve core 20 is realized; on the other hand, the linear contact realizes hard sealing between the valve element 20 and the valve body 10, and improves the sealing between the valve element 20 and the valve body 10. Moreover, the conical surface is easy to machine, the material consumption can be saved, the machining and assembling efficiency is improved, and the cost of the stop valve 100 is reduced.

Example two

The structure of the stop valve 100 of this embodiment is substantially the same as that of the first embodiment, and the same parts are not described again, except that:

referring to fig. 3, when the stop valve 100 is in a closed state, one end of the valve core 20 is connected to the connecting block 30, and the other end of the valve core 20 abuts against the valve seat 40 and is in soft sealing engagement with the valve seat 40. The valve core 20 achieves axial movement within the valve body 10 by being threadedly engaged with the connecting block 30. When the valve element 20 moves in a direction approaching the valve seat 40, one end of the valve element 20 abuts against the valve seat 40 and cooperates with the valve seat 40 to realize sealing, and the passage between the first opening 11 and the second opening 12 is blocked.

Referring to fig. 3 and 4, the stop valve 100 further includes a first sealing element 50, one end of the valve core 20 away from the connecting block 30 is provided with a first groove 22, and the first sealing element 50 is installed in the first groove 22; the end surface of the valve seat 40 close to the valve core 20 is provided with a convex part 41, the convex part 41 protrudes out of the valve seat 40, and the first sealing element 50 is arranged in contact with the convex part 41 and forms soft sealing.

First sealing member 50 can with first recess 22 interference fit, receives the extrusion force that first sealing member 50 self deformation produced, and first sealing member 50 receives holding power each other with first recess 22 to realize fixed spacing, avoid first sealing member 50 to drop, influence stop valve 100's sealing performance. And the boss 41 can be inserted into the first seal 50 and tightly fitted with the first seal 50, thereby further improving the sealing performance of the shut-off valve 100 in the closed state.

Specifically, the first sealing member 50 is made of plastic and has a certain flexibility, so that the first sealing member 50 can be more easily inserted into the first groove 22, and the first sealing member 50 can be abutted against the valve seat 40, so that the first sealing member 50 is deformed, thereby enhancing the sealing performance and further improving the sealing performance of the stop valve 100. Of course, in other embodiments, the material of the first sealing element 50 may be other materials capable of forming a soft seal with the valve seat 40, and is not limited herein.

Furthermore, a limiting portion 23 is formed at one end of the valve core 20 close to the valve seat 40, and the limiting portion 23 can limit the first sealing element 50 to prevent the first sealing element 50 from falling off, so that the sealing performance of the stop valve 100 is affected. Specifically, in the present embodiment, the side wall of the first groove 22 close to the axis of the valve element 20 extends toward the end away from the connecting block 30 and is bent to form a stopper portion 23, and the stopper portion 23 is substantially flared. In other embodiments, the stopper 23 may have a truncated cone shape as long as it can prevent the first sealing member 50 from falling off.

EXAMPLE III

Referring to fig. 6 and 7, the first opening 11 and the second opening 12 are both opened on the periphery of the valve body 10, and the central axis of the first opening 11 is spaced from the central axis of the second opening 12. Specifically, the first opening 11 and the second opening 12 are both opened on the periphery of the valve body 10, and the central axis of the first opening 11 is parallel to the central axis of the second opening 12.

The valve body 10 is a tubular hollow structure, at least two flanging holes 13 are arranged on the periphery of the valve body 10, the flanging holes 13 form a first opening 11 and a second opening 12, a distance is reserved between the central axis of the first opening 11 and the central axis of the second opening 12, and the first opening 11 and the second opening 12 are arranged on different sides of the valve body 10. In one embodiment, the central axis of the first opening 11 and the central axis of the second opening 12 are parallel. The first opening 11 and the second opening 12 each serve as an inlet or outlet for the medium, so that the medium can flow through the shut-off valve 100.

Specifically, at least two flanging holes 13 are arranged on the periphery of the valve body 10, and the existence of the flanging on the flanging holes 13 can increase the connection area between the valve body 10 and the first connecting pipe 60 and the second connecting pipe 70, so that the valve body 10 can be conveniently connected with the first connecting pipe 60 and the second connecting pipe 70, and the connection strength is improved. When the shut-off valve 100 is opened, the medium enters the valve body 10 through the first opening 11 and flows out through the second opening 12. Alternatively, the medium enters the valve body 10 through the second opening 12 and exits through the first opening 11.

Referring to fig. 7, when the stop valve 100 is in a closed state, one end of the valve core 20 is connected to the connecting block 30, and the other end of the valve core 20 abuts against the valve seat 40 and is in hard sealing engagement with the valve seat 40.

Specifically, one end of the valve element 20 close to the valve seat 40 is formed with the second tapered portion 24, a portion of the second tapered portion 24 is located within the valve seat 40, and a tapered surface of the second tapered portion 24 is capable of abutting against the valve seat 40 and forming a line seal. When the second tapered portion 24 of the valve body 20 abuts against the valve seat 40, the tapered surface of the second tapered portion 24 comes into linear contact with the valve seat 40 and is press-fitted to block the passage between the first opening 11 and the second opening 12. On one hand, the limit of the valve core 20 is realized; on the other hand, the linear contact realizes hard sealing between the valve element 20 and the valve body 10, and improves the sealing between the valve element 20 and the valve body 10. Moreover, the conical surface is easy to machine, the material consumption can be saved, the machining and assembling efficiency is improved, and the cost of the stop valve 100 is reduced.

Example four

The structure of the stop valve 100 of this embodiment is basically the same as that of the third embodiment, and the same parts are not described again, but the differences are as follows:

referring to fig. 8, when the stop valve 100 is in a closed state, one end of the valve core 20 is connected to the connecting block 30, and the other end of the valve core 20 abuts against the valve seat 40 and is in soft sealing engagement with the valve seat 40. The valve core 20 achieves axial movement within the valve body 10 by being threadedly engaged with the connecting block 30. When the valve element 20 moves in a direction approaching the valve seat 40, one end of the valve element 20 abuts against the valve seat 40 and cooperates with the valve seat 40 to realize sealing, and the passage between the first opening 11 and the second opening 12 is blocked.

The stop valve 100 further comprises a first sealing element 50, a first groove 22 is formed in one end, away from the connecting block 30, of the valve core 20, and the first sealing element 50 is installed in the first groove 22; the end surface of the valve seat 40 close to the valve core 20 is provided with a convex part 41, the convex part 41 protrudes out of the valve seat 40, and the first sealing element 50 is arranged in contact with the convex part 41 and forms soft sealing.

Furthermore, a limiting portion 23 is further formed at one end of the valve core 20 close to the valve seat 40, and the limiting portion 23 can limit the first sealing element 50 to prevent the first sealing element 50 from falling off, so that the sealing performance of the stop valve 100 is affected. Specifically, in the present embodiment, the side wall of the first groove 22 close to the axis of the valve element 20 extends toward the end away from the connecting block 30 and is bent to form a limiting portion 23, and the limiting portion 23 is substantially flared. In other embodiments, the stopper 23 may have a truncated cone shape as long as it can prevent the first sealing member 50 from falling off.

Referring to fig. 2, the stop valve 100 further includes a circumferential sealing member 90, the valve core 20 is provided with a mounting groove 25 at a position between the connecting block 30 and the guide block 80, and the circumferential sealing member 90 is mounted in the mounting groove 25 to prevent fluid from leaking outside.

Referring to fig. 6, the stop valve 100 further includes a first transition connection pipe 61 and a second transition connection pipe 71, the first transition connection pipe 61 is sleeved on the first connection pipe 60, the second transition connection pipe 71 is sleeved on the second connection pipe 70, the first transition connection pipe 61 and the first connection pipe 60 are made of different materials, and the second transition connection pipe 71 and the second connection pipe 70 are made of different materials. Specifically, the first adapter tube 60 and the second adapter tube 70 are made of stainless steel, and the first transition adapter tube 61 and the second transition adapter tube 71 are made of copper. In this way, welding with an external pipe is facilitated, thereby improving the processing efficiency of the stop valve 100.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A shut-off valve, comprising:

the valve body (10), the said valve body (10) offers the first opening (11) and second opening (12);

a valve core (20), wherein the valve core (20) is at least partially positioned in the valve body (10), and the valve core (20) can move in the valve body (10) to communicate or block the first opening (11) and the second opening (12);

one end of the connecting block (30) is positioned outside the valve body (10), the other end of the connecting block (30) is fixedly connected with the end part of the valve body (10), and the valve core (20) partially extends into the connecting block (30) and is in threaded fit with the connecting block (30);

the connecting block (30) extends towards the valve body (10) along the axial direction of the valve core (20) to form a sealing part (31), and when the stop valve is in a full-open state, the valve core (20) can be abutted against the sealing part (31) to form line sealing.

2. The stop valve according to claim 1, characterized in that one side of the sealing part (31) close to the valve body (10) is fixedly connected with the inner side wall of the valve body (10), and one side of the sealing part (31) far away from the valve body (10) is arranged at an interval with the valve core (20).

3. The shut-off valve according to claim 1, wherein a first tapered portion (21) is formed so that the peripheral side of the valve body (20) protrudes in the direction toward the inner wall of the valve body (10), and a tapered surface of the first tapered portion (21) can abut against the seal portion (31) to form a line seal.

4. A stop valve according to claim 1, characterized in that it further comprises a valve seat (40), said valve seat (40) being provided in said valve body (10) between said first opening (11) and said second opening (12) and being connected to said valve body (10).

5. A valve according to claim 4, characterized in that, in the closed position, one end of the valve element (20) is connected to the connecting block (30) and the other end of the valve element (20) abuts against the valve seat (40) and is in a hard or soft sealing engagement with the valve seat (40).

6. A stop valve according to claim 5, wherein the end of the spool (20) adjacent the valve seat (40) is formed with a second tapered portion (24), part of the second tapered portion (24) being located within the valve seat (40), and the tapered surface of the second tapered portion (24) being capable of abutting the valve seat (40) and forming a line seal.

7. The stop valve according to claim 5, characterized in that it further comprises a first sealing element (50), a first groove (22) is opened on one end of the valve core (20) far away from the connecting block (30), and the first sealing element (50) is installed in the first groove (22); the end face, close to the valve core (20), of the valve seat (40) is provided with a protruding portion (41), the protruding portion (41) protrudes out of the valve seat (40), and the first sealing element (50) is abutted to the protruding portion (41) to form soft sealing.

8. The stop valve according to claim 5, characterized in that the first opening (11) is arranged at one end of the valve body (10) far away from the connecting block (30), the second opening (12) is arranged at the periphery of the valve body (10), and the central axis of the first opening (11) and the central axis of the second opening (12) are arranged at an included angle; or the first opening (11) and the second opening (12) are arranged on the peripheral side of the valve body (10), and the central axis of the first opening (11) is parallel to the central axis of the second opening (12).

9. A shut-off valve according to claim 8, characterized in that it further comprises a first connection pipe (60) and a second connection pipe (70), said first connection pipe (60) being fixedly connected with said first opening (11), said second connection pipe (70) being fixedly connected with said second opening (12);

the valve body (10) is of a tubular hollow structure, at least one flanging hole (13) is formed in the peripheral side of the valve body (10), the flanging hole (13) forms the second opening (12), and the first connecting pipe (60) and the second connecting pipe (70) are arranged at a certain included angle; or, valve body (10) are tubulose hollow structure, the week side of valve body (10) is equipped with two at least flanging hole (13), flanging hole (13) form first opening (11) with second opening (12), the axis of first opening (11) with have the distance between the axis of second opening (12), just first opening (11) with second opening (12) set up the different sides of valve body (10).

10. The shut-off valve according to claim 9, further comprising a first transition connection pipe (61) and a second transition connection pipe (71), wherein the first transition connection pipe (61) is sleeved on the first connection pipe (60), the second transition connection pipe (71) is sleeved on the second connection pipe (70), the first transition connection pipe (61) and the first connection pipe (60) are made of different materials, and the second transition connection pipe (71) and the second connection pipe (70) are made of different materials.