Stop valve

Abstract

The stop valve (100) includes a valve body (10), a valve core (20), and a connection block (30). The valve body (10) is provided with a first opening (11) and a second opening (12). At least a portion of the valve core (20) is located inside the valve body (10) and is movable inside the valve body (10) so as to communicate or block the first opening (11) and the second opening (12). One end of the connection block (30) is located outside the valve body (10) and the other end is fixedly connected to an end of the valve body (10), and a portion of the valve core (20) enters the connection block (30) and is screwed into the connection block (30). A seal portion (31) is formed in the connection block (30) and extends toward the inside of the valve body (10) along the axial direction of the valve core (20). When the stop valve (100) is in a fully open state, the valve core (20) abuts against the seal portion (31) to form a line seal.

Description

[Technical field]

[0001] Related Applications This application claims priority to a Chinese patent application filed on June 30, 2022, bearing application number 202221674476.X and entitled "Stop Valve", and a Chinese patent application filed on June 30, 2022, bearing application number 202221673247.6 and entitled "Stop Valve", the entire contents of which are incorporated herein by reference.

[0002] TECHNICAL FIELD This application relates to the field of refrigeration, and in particular to stop valves. [Background technology]

[0003] In air conditioning systems, stop valves are used to perform the important role of blocking and throttling the medium in the pipeline in which the stop valve is located.

[0004] The structure of the stop valve in the related art includes a valve body, a valve core, and a connection block, the entire valve body is fitted to the outside of the connection block and fixedly connected to the connection block, and a part of the valve core is inserted into the connection block and screwed to the connection block. In this way, the valve core is screwed into the connection hole to realize the movement of the valve core inside the valve body, thereby opening and closing the stop valve. However, when the entire valve body is fitted to the outside of the connection block, the size of the valve body increases, and the material required for processing the valve body increases, which increases the cost of the stop valve. Summary of the Invention

[0005] According to various embodiments of the present application, there is provided a stop valve including a valve body, a valve core and a connection block, the valve body having a first opening and a second opening, at least a portion of the valve core located inside the valve body and movable inside the valve body to communicate or block the first opening and the second opening, one end of the connection block being located outside the valve body and the other end being fixedly connected to an end of the valve body, a portion of the valve core extending inside the connection block and screwed to the connection block, wherein the connection block has a seal portion formed extending toward the inside of the valve body along the axial direction of the valve core, and when the stop valve is in a fully open state, the valve core abuts against the seal portion to form a line seal.

[0006] In one embodiment, a surface of the seal adjacent to the valve body is fixedly connected to an inner wall of the valve body, and a surface of the seal remote from the valve body is spaced apart from the valve core.

[0007] In one embodiment, a first tapered portion is formed on the peripheral side of the valve core so as to protrude toward the inner wall of the valve body, and the tapered surface of the first tapered portion can be abutted against the seal portion to form a line seal.

[0008] In one embodiment, the stop valve further includes a guide block, which is located inside the valve body and connected to the valve body, is provided adjacent to the first opening and the second opening with respect to the connection block, is located on the outer periphery of a part of the valve core, and the valve core is movable along the guide direction of the guide block to communicate or block the first opening and the second opening.

[0009] In one embodiment, the second opening is located on the circumferential side of the valve body, and the projection of the guide block on the valve body along the radial direction of the valve body and the second opening do not overlap each other.

[0010] In one embodiment, the guide block includes a guide ramp at one end of the guide block adjacent the connecting block.

[0011] In one embodiment, the stop valve further includes a valve seat provided inside the valve body and located between the first opening and the second opening and connected to the valve body, and when the stop valve is in a closed state, one end of the valve core is connected to the connection block and the other end of the valve core abuts against the valve seat to be in hard seal engagement or soft seal engagement with the valve seat.

[0012] In one embodiment, a second tapered portion is formed at one end of the valve core adjacent to the valve seat, a portion of the second tapered portion is located inside the valve seat, and a tapered surface of the second tapered portion can abut against the valve seat to form a line seal.

[0013] In one embodiment, the stop valve further includes a first sealing member, a first groove is formed at one end of the valve core away from the connecting block, the first sealing member is mounted inside the first groove, and a protrusion is provided on an end face of the valve seat adjacent to the valve core, the protrusion protruding from the valve seat, and the first sealing member and the protrusion are abutted against each other to form a soft seal.

[0014] In one embodiment, the first opening is drilled at one end of the valve body remote from the connection block, and the second opening is drilled on the circumferential side of the valve body, with the central axis of the first opening and the central axis of the second opening forming a certain included angle; or the first opening and the second opening are both drilled on the circumferential side of the valve body, with the central axis of the first opening and the central axis of the second opening being parallel to each other, and the first opening and the second opening are drilled on different sides of the circumferential side of the valve body.

[0015] In one embodiment, the stop valve further includes a first connecting pipe and a second connecting pipe, the first connecting pipe being fixedly connected to the first opening and the second connecting pipe being fixedly connected to the second opening.

[0016] In one embodiment, the stop valve further includes a first transition connecting pipe and a second transition connecting pipe, the first transition connecting pipe is fitted onto the first connecting pipe, the second transition connecting pipe is fitted onto the second connecting pipe, the first transition connecting pipe and the first connecting pipe are made of different materials, and the second transition connecting pipe and the second connecting pipe are made of different materials.

[0017] To make other features, objects and advantages of the present application more readily apparent, reference is made to the details of one or more embodiments of the present application in the drawings and description that follow. [Brief description of the drawings]

[0018] In order to more clearly explain the technical aspects of the embodiments of the present application or the prior art, the drawings necessary for the description of the embodiments or the prior art are briefly introduced below. However, the drawings in the following description are merely embodiments of the present application, and it is obvious to those skilled in the art that other drawings can be obtained based on the disclosed drawings without creative efforts.

[0019] [Figure 1] FIG. 2 is a structural schematic diagram of a stop valve according to one or more embodiments. [Diagram 2] 1 is a cross-sectional view of a stop valve according to one or more embodiments. [Diagram 3] FIG. 3 is a partial enlarged view of a portion A in FIG. [Figure 4] FIG. 2 illustrates a cross-sectional view of a stop valve in a closed state according to one or more embodiments. [Diagram 5] FIG. 5 is a partial enlarged view of a portion B in FIG. [Figure 6] FIG. 2 is a cross-sectional view of a stop valve in an open state according to one or more embodiments. [Figure 7] FIG. 2 is a structural schematic diagram of a stop valve according to one or more embodiments. [Figure 8] 1 is a cross-sectional view of a stop valve according to one or more embodiments. [Figure 9] 1 is a cross-sectional view of a stop valve according to one or more embodiments.

[0020] The meanings of the symbols in the figure are as follows: 100 stop valve, 10 valve body, 11 first opening, 12 second opening, 13 flange hole, 20 valve core, 21 first tapered portion, 22 first groove, 23 limiting portion, 24 second tapered portion, 25 second groove, 30 connection block, 31 sealing portion, 40 valve seat, 41 protrusion portion, 50 first sealing member, 60 first connecting pipe, 61 first transition connecting pipe, 70 second connecting pipe, 71 second transition connecting pipe, 80 guide block, 81 guide inclined surface, 90 second sealing member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the technical aspects of the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are merely some of the embodiments of the present application, and are not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present application.

[0022] 1 and 7, the present application provides a stop valve 100 to be installed in an air conditioning system. In the air conditioning system, the stop valve 100 is used to play an important role of blocking and throttling the medium in the pipeline where the stop valve 100 is located.

[0023] The structure of the stop valve in the related art includes a valve body, a valve core, and a connection block, the valve body is fitted to the outside of the connection block and fixedly connected to the connection block, and the valve core and the connection block are screw-connected to realize the movement of the valve core inside the valve body, thereby opening and closing the stop valve. However, when the valve body is fitted to the outside of the connection block, the size of the valve body increases, and the material required for processing increases, which increases the cost of the stop valve.

[0024] In order to solve the above problems, referring to Fig. 2 to Fig. 9, the stop valve 100 provided in the present application includes a valve body 10, a valve core 20 and a connection block 30. A first opening 11 and a second opening 12 are drilled in the valve body 10. At least a portion of the valve core 20 is located inside the valve body 10, and is movable inside the valve body 10 to communicate or block the first opening 11 and the second opening 12. One end of the connection block 30 is located outside the valve body 10, and the other end is fixedly connected to an end of the valve body 10, and a portion of the valve core 20 enters the inside of the connection block 30 and is screwed into the connection block 30.

[0025] In the stop valve of the related art, when the cross-sectional area of ​​the connection block 30 is constant, the valve body of the related art is fitted to the outside of the connection block, so that the size of the valve body is increased and the material required for processing the valve body is increased. In the present application, the valve body 10 is processed from a tube material or a rod material, and a flange hole 13 is drilled on the side of the valve body 10, and the flange hole 13 is connected to a connection pipe. The connection block 30 has one end located outside the valve body 10 and the other end fixedly connected to the end of the valve body 10, thereby reducing the diameter of the valve body 10, and further reducing the material consumption of the valve body 10, and reducing the cost of the stop valve 100. In addition, the screw strength between the connection block 30 and the valve core 20 can be improved to improve the overall structural stability of the stop valve 100.

[0026] 2, 4, 6, 8 and 9, the connection block 30 is formed with a seal portion 31 extending toward the inside of the valve body 10 along the axial direction of the valve core 20. Specifically, one side surface of the seal portion 31 close to the valve body 10 is fixedly connected to the inner wall of the valve body 10, and one side surface of the seal portion 31 remote from the valve body 10 is spaced apart from the valve core 20. The seal portion 31 and the inner wall of the valve body 10 are abutted against each other to increase the contact area therebetween, thereby improving the connection strength between the seal portion 31 and the valve body 10, and further improving the connection strength between the connection block 30 and the valve body 10, thereby increasing the robustness of the connection block 30.

[0027] When the stop valve 100 is in a fully open state, the valve core 20 can abut against the seal portion 31 to form a line seal. Specifically, a first tapered portion 21 is formed on the periphery of the valve core 20, protruding toward the inner wall of the valve body 10, and the tapered surface of the first tapered portion 21 can abut against the seal portion 31 to form a line seal, thereby improving the reverse sealing performance between the connection block 30 and the valve core 20 and avoiding the problem of medium leakage. There is no need to provide another sealing structure separately, which saves material costs and reduces the difficulty of processing and assembling the stop valve 100.

[0028] The sealing portion 31 can also act as a limiting force on the valve core 20 to control the maximum opening of the stop valve 100. During operation, when the valve core 20 moves along its axial direction toward the connection block 30 until it abuts against the sealing portion 31, this is the maximum opening of the stop valve 100.

[0029] The stop valve 100 further includes a valve seat 40, a first connecting pipe 60 and a second connecting pipe 70. The valve seat 40 is provided inside the valve body 10 and is located between the first opening 11 and the second opening 12 and connected to the valve body 10. The first connecting pipe 60 is fixedly connected to the first opening 11, and the second connecting pipe 70 is fixedly connected to the second opening 12. The first connecting pipe 60 is inserted into the first opening 11, and the first opening 11 is connected to the air-conditioning pipeline through the first connecting pipe 60. The second connecting pipe 70 is inserted into the second opening 12, and the second opening 12 is connected to the air-conditioning pipeline through the second connecting pipe 70. The valve seat 40 can act to limit the movement of the valve core 20 away from the connection block 30, and when the stop valve 100 is in a closed state, the valve core 20 abuts against the valve seat 40 and engages with the valve seat 40 to achieve a seal, thereby blocking the flow of medium between the first opening 11 and the second opening 12. When the stop valve 100 is in an open state, the valve core 20 is not in contact with the valve seat 40, so that the medium can flow between the first opening 11 and the second opening 12.

[0030] Furthermore, the stop valve 100 further includes a guide block 80, which is located inside the valve body 10 and connected to the valve body 10, is provided adjacent to the first opening 11 and the second opening 12 with respect to the connection block 30, and is located on a part of the outer periphery of the valve core 20, and the valve core 20 is movable along the guide direction of the guide block 80 so as to connect or block the first opening 11 and the second opening 12.

[0031] Compared with the stop valve 100 provided in the present application, the stop valve in the related art has a connection block provided inside the valve body and screw-connected to the valve core, and the valve core is moved inside the valve body along its own axial direction only by the connection block, but when provided in this way, the axis of the valve core may deviate from the axis of the valve body during the assembly or operation process of the valve core, causing the valve core to be unable to abut firmly against the valve seat, resulting in medium leakage and affecting the sealing performance of the stop valve.

[0032] In this application, the guide block 80 is separately provided inside the valve body 10, so that the valve core 20 can move along the guide direction of the guide block 80, and the engagement between the guide block 80 and the connection block 30 can further reduce the probability of the valve core 20 being offset, and ensure that the axes of the valve core 20, the valve body 10 and the valve seat 40 are overlapped. Therefore, when the valve core 20 moves along its own axial direction inside the valve body 10 and moves to the limit position in the direction approaching the valve seat 40, the valve core 20 can accurately abut against the valve seat 40 and engage with the valve seat 40 to achieve a sealing effect, thereby improving the sealing performance of the stop valve 100. In other words, the guide block 80 prevents the valve core 20 from being offset inside the valve body 10, thereby improving the sealing reliability after the engagement between the valve core 20 and the valve seat 40.

[0033] It should be noted that in this application, the guide direction of the guide block 80 is the axial direction of the guide block 80 .

[0034] 2, the second opening 12 is located on the circumferential side of the valve body 10, and the projection of the guide block 80 on the valve body 10 along the radial direction of the valve body 10 does not overlap with the second opening 12. In this way, it is possible to prevent the guide block 80 from blocking the medium flowing from the second opening 12 into the inside of the valve body 10, or to prevent the guide block 80 from blocking the medium flowing from the inside of the valve body 10 to the second opening 12. Also, by providing in this way, it is possible to avoid the generation of noise due to the flow inside the valve body 10, thereby allowing the medium to flow smoothly, improving the usability of the stop valve 100.

[0035] 2 and 3, the guide block 80 includes a guide inclined surface 81, which is provided at one end of the guide block 80 adjacent to the connection block 30. Specifically, the guide inclined surface 81 is located on one side of the central axis of the guide block 80 adjacent to the valve core 20, and can play a role of strengthening the guide so as to facilitate the insertion of the valve core 20 into the guide block 80, and can prevent the valve core 20 from colliding with the guide block 80, preventing the valve core 20 from being smoothly inserted, thereby improving the assembly efficiency of the valve core 20. Of course, in other embodiments, the guide block 80 may be provided with other structures having a guiding function other than the guide inclined surface 81 as long as the same effect can be achieved.

[0036] Example 1 1 and 2, the first opening 11 is drilled at one end of the valve body 10 away from the connection block 30, and the second opening 12 is drilled on the circumferential side 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 to form a certain included angle. For example, the included angle may be 75°, 90°, 120°, etc. The valve body 10 is a tubular hollow structure, and at least one flange hole 13 is provided on the circumferential side of the valve body 10, which forms the second opening 12, and the first connecting pipe 60 and the second connecting pipe 70 are arranged to form a certain included angle. The first opening 11 and the second opening 12 are respectively the inlet and outlet of the medium, thereby realizing the flow of the medium inside the stop valve 100.

[0037] Specifically, at least a portion of the valve seat 40 is provided inside the valve body 10 through the first opening 11, and the first connecting pipe 60 is inserted into the valve seat 40 and fixedly connected to the valve seat 40. At least one flange hole 13 is provided on the periphery of the valve body 10, and the flange of the flange hole 13 can increase the connection area between the valve body 10 and the second connecting pipe 70, making it easier to connect the valve body 10 and the second connecting pipe 70, and improving the connection strength between the valve body 10 and the second connecting pipe 70. When the stop valve 100 is opened, the medium enters the inside of the valve body 10 through the first opening 11 and flows out from the second opening 12, or the medium enters the inside of the valve body 10 through the second opening 12 and flows out from the first opening 11.

[0038] 2 , when the stop valve 100 is in a closed state, one end of the valve core 20 is connected to the connection block 30, and the other end of the valve core 20 abuts against the valve seat 40 and engages with the valve seat 40 with a hard seal. The valve core 20 is screwed with the connection block 30 and guided by the guide block 80, which prevents the valve core 20 from being offset, thereby realizing the axial movement of the valve core 20 inside the valve body 10. When the valve core 20 moves to the limit in the direction approaching the valve seat 40, one end of the valve core 20 abuts against the valve seat 40 and engages with the valve seat 40 to realize sealing, thereby improving the sealing performance of the stop valve 100.

[0039] Specifically, a second tapered portion 24 is formed at one end of the valve core 20 adjacent to the valve seat 40, a part of the second tapered portion 24 is located inside the valve seat 40, and the tapered surface of the second tapered portion 24 can be abutted against the valve seat 40 to form a line seal. The valve core 20 realizes axial movement inside the valve body 10 by screwing with the connection block 30, and when the second tapered portion 24 of the valve core 20 abuts against the valve seat 40, the tapered surface of the second tapered portion 24 and the valve seat 40 form linear contact, specifically, the linear contact is formed by a circular intersection line formed by the intersection of the end face of the one end of the valve seat 40 adjacent to the valve core 20 and the inner wall of the valve seat 40 and the tapered surface of the second tapered portion 24 abutting against each other, and the second tapered portion 24 and the valve seat 40 are pressed into engagement to block the passage between the first opening 11 and the second opening 12. On the one hand, it realizes the restriction of the valve core 20, and on the other hand, it realizes a hard seal between the valve core 20 and the valve body 10 through linear contact, thereby improving the sealing performance between the valve core 20 and the valve body 10. In addition, the tapered surface is easy to process and can save on material usage, thereby improving the processing and assembly efficiency of the stop valve 100 and reducing the cost of the stop valve 100.

[0040] Example 2 The structure of the stop valve 100 of this embodiment is substantially the same as that of the first embodiment, and the same points will not be described repeatedly. The differences are as follows. 4, when the stop valve 100 is in a closed state, one end of the valve core 20 is connected to the connection block 30, and the other end of the valve core 20 abuts against the valve seat 40 to engage with the valve seat 40 in a soft-sealing engagement. The valve core 20 is screwed with the connection block 30 and guided by the guide block 80, which prevents the valve core 20 from being offset, thereby realizing the axial movement of the valve core 20 inside the valve body 10. When the valve core 20 moves to the limit in the direction approaching the valve seat 40, one end of the valve core 20 abuts against the valve seat 40 and engages with the valve seat 40 to realize sealing, and the passage between the first opening 11 and the second opening 12 is blocked.

[0041] 4 and 5, the stop valve 100 further includes a first sealing member 50, a first groove 22 is drilled at one end of the valve core 20 remote from the connection block 30, and the first sealing member 50 is mounted inside the first groove 22. A protrusion 41 is provided on the end face of the valve seat 40 adjacent to the valve core 20, the protrusion 41 protrudes from the valve seat 40, and the first sealing member 50 is abutted against the protrusion 41 to form a soft seal.

[0042] The first seal member 50 may be interference-fitted with the first groove 22, and the first seal member 50 and the first groove 22 can receive a supporting force from each other when the first seal member 50 itself is subjected to a pressing force, thereby realizing a fixed restriction between the first seal member 50 and the first groove 22 and preventing the first seal member 50 from falling off and affecting the sealing performance of the stop valve 100. The protrusion 41 can be inserted into the inside of the first seal member 50 and closely engage with the first seal member 50, thereby further improving the sealing performance of the stop valve 100 in the closed state.

[0043] Specifically, the material of the first seal member 50 is rubber and has a certain flexibility, so that the first seal member 50 can be more easily fitted into the first groove 22, and the first seal member 50 can abut against the valve seat 40 so as to be deformed, thereby strengthening the sealing performance of the first seal member 50 and further improving the sealing ability of the stop valve 100. Of course, in other embodiments, the material of the first seal member 50 may be other materials that can form a soft seal with the valve seat 40, and is not limited here.

[0044] In addition, a limiting portion 23 is further formed at one end of the valve core 20 adjacent to the valve seat 40, and the limiting portion 23 can limit the first seal member 50 to prevent the first seal member 50 from falling off and affecting the sealing performance of the stop valve 100. Specifically, in this embodiment, the side wall of the first groove 22 adjacent to the axis of the valve core 20 extends toward one end away from the connection block 30 and curves to form the limiting portion 23, which has a substantially flared shape. In other embodiments, the limiting portion 23 may be a truncated cone shape as long as it can play a role in preventing the first seal member 50 from falling off.

[0045] Example 3 7 and 8, the first opening 11 and the second opening 12 are both formed on the circumferential side of the valve body 10, and there is a distance between the central axis of the first opening 11 and the central axis of the second opening 12. Specifically, the first opening 11 and the second opening 12 are both formed on the circumferential side of the valve body 10, and the central axis of the first opening 11 and the central axis of the second opening 12 are parallel to each other.

[0046] The valve body 10 has a tubular hollow structure, and at least two flange holes 13 are provided on the circumferential side of the valve body 10. The flange holes 13 form a first opening 11 and a second opening 12. There is a distance 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 provided on different sides of the circumferential side 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 are respectively an inlet and an outlet of the medium, thereby realizing the flow of the medium inside the stop valve 100.

[0047] Specifically, at least two flange holes 13 are provided on the circumferential side of the valve body 10, and the presence of flanges in the flange holes 13 can increase the connection area between the valve body 10 and the first connecting pipe 60 and the second connecting pipe 70, making it easier to connect the valve body 10 to the first connecting pipe 60 and the second connecting pipe 70, and improving the connection strength. When the stop valve 100 is opened, the medium enters the inside of the valve body 10 through the first opening 11 and flows out from the second opening 12. Or, the medium enters the inside of the valve body 10 through the second opening 12 and flows out from the first opening 11.

[0048] 8, when the stop valve 100 is in a closed state, one end of the valve core 20 is connected to the connection block 30, and the other end of the valve core 20 abuts against the valve seat 40 and engages with the valve seat 40 in a hard-sealed engagement. The valve core 20 is screwed with the connection block 30 and guided by the guide block 80, which prevents the valve core 20 from being offset, thereby realizing the axial movement of the valve core 20 inside the valve body 10. When the valve core 20 moves to the limit in the direction approaching the valve seat 40, one end of the valve core 20 abuts against the valve seat 40 and engages with the valve seat 40 to realize sealing, thereby improving the sealing performance of the stop valve 100.

[0049] Specifically, a second tapered portion 24 is formed at one end of the valve core 20 adjacent to the valve seat 40, a part of the second tapered portion 24 is located inside the valve seat 40, and the tapered surface of the second tapered portion 24 can be abutted against the valve seat 40 to form a line seal. The valve core 20 realizes axial movement inside the valve body 10 by screwing with the connection block 30, and when the second tapered portion 24 of the valve core 20 abuts against the valve seat 40, the tapered surface of the second tapered portion 24 and the valve seat 40 form linear contact, specifically, the linear contact is formed by a circular intersection line formed by the intersection of the end face of the one end of the valve seat 40 adjacent to the valve core 20 and the inner wall of the valve seat 40 and the tapered surface of the second tapered portion 24 abutting against each other, and the second tapered portion 24 and the valve seat 40 are pressed into engagement to block the passage between the first opening 11 and the second opening 12. On the one hand, it realizes the restriction of the valve core 20, and on the other hand, it realizes a hard seal between the valve core 20 and the valve body 10 through linear contact, thereby improving the sealing performance between the valve core 20 and the valve body 10. In addition, the tapered surface is easy to process and can save on material usage, thereby improving the processing and assembly efficiency of the stop valve 100 and reducing the cost of the stop valve 100.

[0050] Example 4 The structure of the stop valve 100 of this embodiment is substantially the same as that of the third embodiment, and the same points will not be described repeatedly. The differences are as follows. 9, when the stop valve 100 is in a closed state, one end of the valve core 20 is connected to the connection block 30, and the other end of the valve core 20 abuts against the valve seat 40 to engage with the valve seat 40 in a soft-sealing engagement. The valve core 20 is screwed with the connection block 30 and guided by the guide block 80, which prevents the valve core 20 from being offset, thereby realizing the axial movement of the valve core 20 inside the valve body 10. When the valve core 20 moves to the limit in the direction approaching the valve seat 40, one end of the valve core 20 abuts against the valve seat 40 and engages with the valve seat 40 to realize sealing, and the passage between the first opening 11 and the second opening 12 is blocked.

[0051] The stop valve 100 further includes a first seal member 50, and a first groove 22 is formed in one end of the valve core 20 remote from the connection block 30, and the first seal member 50 is mounted inside the first groove 22. A protrusion 41 is formed on the end face of the valve seat 40 adjacent to the valve core 20, and the protrusion 41 protrudes from the valve seat 40, and the first seal member 50 is abutted against the protrusion 41 to form a soft seal.

[0052] The first seal member 50 may be interference-fitted with the first groove 22, and the first seal member 50 and the first groove 22 can receive a supporting force from each other when the first seal member 50 itself is subjected to a pressing force, thereby realizing a fixed restriction between the first seal member 50 and the first groove 22 and preventing the first seal member 50 from falling off and affecting the sealing performance of the stop valve 100. The protrusion 41 can be inserted into the inside of the first seal member 50 and closely engage with the first seal member 50, thereby further improving the sealing performance of the stop valve 100 in the closed state.

[0053] Specifically, the material of the first seal member 50 is rubber and has a certain flexibility, so that the first seal member 50 can be more easily fitted into the first groove 22, and the first seal member 50 can abut against the valve seat 40 so as to be deformed, thereby strengthening the sealing performance of the first seal member 50 and further improving the sealing ability of the stop valve 100. Of course, in other embodiments, the material of the first seal member 50 may be other materials that can form a soft seal with the valve seat 40, and is not limited here.

[0054] In addition, a limiting portion 23 is further formed at one end of the valve core 20 adjacent to the valve seat 40, and the limiting portion 23 can limit the first seal member 50 to prevent the first seal member 50 from falling off and affecting the sealing performance of the stop valve 100. Specifically, in this embodiment, the side wall of the first groove 22 adjacent to the axis of the valve core 20 extends toward one end away from the connection block 30 and curves to form the limiting portion 23, which has a substantially flared shape. In other embodiments, the limiting portion 23 may be a truncated cone shape as long as it can play a role in preventing the first seal member 50 from falling off.

[0055] 2 to 9, the stop valve 100 further includes a second sealing member 90, and the valve core 20 has a second groove 25 at a position between the connection block 30 and the guide block 80, and the second sealing member 90 is installed inside the second groove 25 to prevent fluid from leaking to the outside.

[0056] Here, the second sealing member 90 is a circumferential sealing member, that is, the second sealing member 90 is a seal ring structure extending along the circumferential direction of the valve core 20, and the second groove 25 is correspondingly formed as an annular groove. In this way, when the second sealing member 90 is attached to the second groove 25, the second sealing member 90 can ensure the sealing reliability between the valve core 20 and the valve body 10.

[0057] 7, the stop valve 100 further includes a first transition connecting pipe 61 and a second transition connecting pipe 71, the first transition connecting pipe 61 is fitted on the first connecting pipe 60, the second transition connecting pipe 71 is fitted on the second connecting pipe 70, the first transition connecting pipe 61 and the first connecting pipe 60 are made of different materials, and the second transition connecting pipe 71 and the second connecting pipe 70 are made of different materials. Specifically, the first connecting pipe 60 and the second connecting pipe 70 are made of stainless steel, and the first transition connecting pipe 61 and the second transition connecting pipe 71 are made of copper. In this way, the stop valve 100 can be easily welded to the external pipeline, thereby improving the installation efficiency.

[0058] The technical features of the above embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; however, as long as there is no contradiction in the combination of these technical features, all of them should be considered within the scope described in this specification.

[0059] The above examples merely show some embodiments of the present application, and although the description is relatively specific and detailed, it should not be understood as limiting the scope of the claims of the application. It should be pointed out that those skilled in the art can make some modifications and improvements without departing from the spirit of the present application, and all of these are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be according to the scope of the attached claims.

Claims

1. A stop valve, a valve body having a first opening and a second opening; a valve core, at least a portion of which is located inside the valve body and which is movable inside the valve body so as to establish or block communication between the first opening and the second opening; a connection block, one end of which is located outside the valve body and the other end of which is fixedly connected to an end of the valve body, and a part of the valve core is inserted into the connection block and screwed to the connection block; Here, a seal portion is formed in the connection block extending toward the inside of the valve body along the axial direction of the valve core, and when the stop valve is in a fully open state, the valve core can abut against the seal portion to form a line seal.

2. 2. The stop valve according to claim 1, wherein a surface of the seal portion adjacent to the valve body and an inner wall of the valve body are fixedly connected, and a surface of the seal portion away from the valve body and the valve core are spaced apart.

3. 2. The stop valve according to claim 1, wherein a first tapered portion is formed on a peripheral side of the valve core so as to protrude toward an inner wall of the valve body, and a tapered surface of the first tapered portion can be abutted against the seal portion to form a line seal.

4. 2. The stop valve according to claim 1, further comprising a guide block, the guide block being located inside the valve body and connected to the valve body, being provided adjacent to the first opening and the second opening with respect to the connection block, being located on the outer periphery of a portion of the valve core, and the valve core being movable along a guide direction of the guide block so as to connect or disconnect the first opening and the second opening.

5. 5. The stop valve according to claim 4, wherein the second opening is located on a peripheral side of the valve body, and a projection of the guide block on the valve body along a radial direction of the valve body and the second opening do not overlap each other.

6. The guide block is 5. The stop valve of claim 4 including a guide ramp provided at one end of said guide block adjacent said connecting block.

7. 2. The stop valve according to claim 1, further comprising a valve seat provided inside the valve body and positioned between the first opening and the second opening and connected to the valve body, wherein when the stop valve is in a closed state, one end of the valve core is connected to the connection block and the other end of the valve core abuts against the valve seat and is in hard seal engagement or soft seal engagement with the valve seat.

8. 8. The stop valve according to claim 7, wherein a second tapered portion is formed at one end of the valve core adjacent to the valve seat, a part of the second tapered portion is located inside the valve seat, and a tapered surface of the second tapered portion can abut against the valve seat to form a line seal.

9. 8. The stop valve according to claim 7, further comprising a first seal member, a first groove is formed in one end of the valve core away from the connection block, the first seal member is mounted inside the first groove, a protrusion is provided on an end face of the valve seat adjacent to the valve core, the protrusion protrudes from the valve seat, and the first seal member and the protrusion are abutted against each other to form a soft seal.

10. 8. The stop valve according to claim 7, wherein the first opening is formed at one end of the valve body remote from the connection block, the second opening is formed on the circumferential side of the valve body, and a central axis of the first opening and a central axis of the second opening are provided at a certain included angle, or the first opening and the second opening are both formed on the circumferential side of the valve body, and a central axis of the first opening and a central axis of the second opening are parallel to each other, and the first opening and the second opening are provided on different sides of the circumferential side of the valve body.

11. 11. The stop valve of claim 10, further comprising a first connecting pipe and a second connecting pipe, the first connecting pipe fixedly connected to the first opening and the second connecting pipe fixedly connected to the second opening.

12. 12. The stop valve of claim 11, further comprising a first transition connecting pipe and a second transition connecting pipe, wherein the first transition connecting pipe is fitted onto the first connecting pipe, and the second transition connecting pipe is fitted onto the second connecting pipe, the first transition connecting pipe and the first connecting pipe are made of different materials, and the second transition connecting pipe and the second connecting pipe are made of different materials.

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