Shut-off valve

Abstract

A shut-off valve, comprising: a valve body (10), which comprises a valve cavity (11), a valve core channel (12), a valve port (13) and an opening (14), wherein the opening (14) is provided at the end of the valve body (10) away from the valve port (13); a valve core (20), which is mounted on the valve core channel (12) in a sealing manner by means of the opening (14), can move in an axial direction of the valve core channel (12) and can open or block the valve port (13); and a sealing structure (30), which is provided at the opening (14) and extends into the valve core channel (12), wherein the end of the valve core (20) close to the sealing structure (30) is provided with a first sealing surface (21). When the valve core (20) is in a first position, the valve core (20) blocks the valve port (13), and when the valve core (20) is in a second position, the valve core opens the valve port (13). The shut-off valve can solve the problem of the valve core flying away from the opening due to improper mounting of a clamping ring of the shut-off valve.

Description

stop valve

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 202322350423.3, filed on August 30, 2023, entitled “Stop Valve”, and priority to Chinese patent application number 202323148006.7, filed on November 20, 2023, entitled “Stop Valve”, the entire text of which is hereby incorporated by reference. Technical Field

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

[0004] A globe valve is a common shutoff valve that can control the flow and shutoff of fluids. It consists of a valve body and a valve core. The valve body has a valve cavity, a first opening, and a second opening. The valve core can move within the valve cavity to block either the first opening or the second opening, thereby shutting off the fluid in the valve cavity. The valve core can also unblock the first or second opening, allowing the fluid in the valve cavity to flow.

[0005] In related technologies, the valve body is also constructed with an opening that connects to the valve cavity. The valve core is installed in the valve cavity through the opening. When the valve core stops blocking the first opening or the second opening, the valve core moves toward the opening. Typically, a retaining ring structure is installed in the opening, and the retaining ring cooperates with the valve core stop to prevent the valve core from falling out of the opening. However, the internal retaining ring needs to be manually installed in the valve cavity, and there is a risk that the valve core will fly out of the opening if the retaining ring is not installed properly.

[0006] Furthermore, in related art, a cap structure is required at the open end. Typically, the outer wall of the valve core passageway, away from the valve cavity, is provided with an external thread structure, and the cap structure is provided with a threaded hole. The cap structure is buckled onto the end of the valve core passageway away from the valve cavity and engages with the outer wall of the valve core passageway through a threaded connection. However, providing the outer thread structure on the outer wall of the valve core passageway and machining the external thread structure reduces the wall thickness of the valve core passageway, thereby reducing the structural strength of the valve core passageway.

[0007] Summary of the Invention

[0008] Based on this, it is necessary to provide a stop valve to solve the problem that the valve core may be at risk of flying out of the opening due to the retaining ring of the stop valve being improperly installed.

[0009] The present application provides a stop valve, comprising: a valve body, comprising a valve cavity, a valve core channel, a valve port and an opening, wherein the opening is arranged at one end of the valve body away from the valve port; a valve core, which is sealed and installed in the valve core channel via the opening, and the valve core can move along the axial direction of the valve core channel, and the valve core can open or block the valve port to realize the opening and closing of the valve cavity; a sealing structure, which is arranged at the opening, and the sealing structure at least partially extends into the valve core channel, and a first sealing surface is provided at one end of the valve core close to the sealing structure; wherein, when the valve core is in a first position, the valve core abuts against the valve port, and the valve core blocks the valve port, and when the valve core is in a second position, the first sealing surface abuts against the end edge line of the sealing structure located at the valve core channel, and the valve core opens the valve port.

[0010] In some embodiments, the sealing structure is provided with through holes passing through both ends of the sealing structure along the axial direction of the valve core channel, and the first sealing surface is configured as a conical surface. Along the direction from the valve core to the sealing structure, the conical surface is contracted relative to the axis of the valve core channel. When the valve core is in the second position, part of the valve core extends into the through hole, and the first sealing surface abuts against the edge of the through hole.

[0011] In some embodiments, an angle formed by the conical surface relative to the axis of the valve body is defined as A, and A satisfies 15°≤A≤75°.

[0012] In some embodiments, the valve core includes an operating hole and a contraction section, the contraction section is arranged close to the sealing structure, the outer peripheral wall of the contraction section forms the conical surface, the operating hole is recessed inward from the contraction section toward the upper end surface of the sealing structure along the axial direction of the valve core channel, and the operating hole is connected to the through hole.

[0013] In some embodiments, the minimum outer diameter of the contraction section is defined as D1, the maximum radial dimension of the operation hole is defined as D2, and D1 and D2 satisfy D2<D1≤2D2.

[0014] In some embodiments, the sealing structure includes a first section and a second section, the diameter of the first section is smaller than the diameter of the second section, a step surface is formed between the first section and the second section, the first section is inserted into the valve core channel, and the step surface is limitedly matched with the exposed end face of the valve body.

[0015] In some embodiments, the second section is welded to the end face where the opening is located, and the second section is overlapped on the end face where the opening is located along the axial direction of the valve core channel and welded to the end face where the opening is located, and at least one of the second section and the end face where the opening is located is provided with a notch portion, and the notch portion is chamfered so that the second section overlaps with the end face where the opening is located to form a welding groove, and a weld is formed at the overlap, and the welding groove is filled with solder.

[0016] In some embodiments, a first notch portion is provided at the end where the opening is located, a second notch portion is provided at the second section, and the welding groove is formed between the first notch portion and the second notch portion.

[0017] In some embodiments, the first sealing surface is configured as a conical surface, and along the direction from the valve core to the sealing structure, the conical surface is expanded relative to the axis of the valve core. When the valve core is in the second position, part of the conical surface is located on the outer periphery of the first section, and the outer edge line of the first section abuts against the conical surface.

[0018] In some embodiments, the sealing structure includes through holes running through both ends of the valve core channel along the axial direction, and the stop valve also includes a blocking member, at least part of which is passed through the through hole and engaged with the through hole thread.

[0019] In some embodiments, the sealing part includes: a sealing portion, at least a portion of which is passed through the through hole and engaged with the through hole thread; an operating portion, which is connected to the sealing portion, and the outer surface of the operating portion is provided with anti-slip lines protruding outward or recessed inward from the outer surface, and the operating portion and the sealing portion are distributed along the axial direction of the sealing portion.

[0020] In some embodiments, the operating portion is arranged in a circumferential ring shape along the outside of the sealing portion, and an escape space is formed between the operating portion and the sealing portion; at least part of the sealing structure is passed through the escape space, and / or a part of the valve body corresponding to the end of the valve core channel away from the valve port is passed through the escape space.

[0021] In some embodiments, the side wall of the sealing portion includes a second sealing surface, the diameter of which gradually increases along the axial direction of the valve body toward the direction away from the valve port; a third sealing surface is provided at one end of the sealing structure away from the valve port, the diameter of the third sealing surface gradually increases along the axial direction of the valve body toward the direction away from the valve port, and a seal is formed between the second sealing surface and the third sealing surface.

[0022] In some embodiments, the angle between the second sealing surface and the axis of the valve core channel is defined as B, and the angle between the third sealing surface and the axis of the valve core channel is defined as C. When the angle B between the second sealing surface and the axis of the valve core channel is not equal to the angle C between the third sealing surface and the axis of the valve core channel, the second sealing surface and the third sealing surface are linearly sealed.

[0023] In some embodiments, the angle between the second sealing surface and the axis of the valve core channel is defined as B, and the angle between the third sealing surface and the axis of the valve core channel is defined as C. When the angle B between the second sealing surface and the axis of the valve core channel is equal to the angle C between the third sealing surface and the axis of the valve core channel, the second sealing surface, the third sealing surface and the second sealing surface are surface-sealed.

[0024] In some embodiments, the wall of the through hole is provided with an internal thread, the major diameter of the internal thread is defined as D3, the diameter of the valve core channel is defined as D4, and D3 and D4 satisfy the following relationship:

[0025] D3<D4;and,

[0026] An operating hole is provided on the end surface of the valve core away from the valve port. The operating hole is used for inserting an operating tool. The maximum radial dimension of the operating hole is defined as D2, and the minor diameter of the internal thread is defined as D5. D2 and D5 satisfy the following relationship:

[0027] D2<D5.

[0028] In some embodiments, the stop valve also includes a sealing ring, and a sealing groove is provided on the outer wall of the valve core. The sealing groove is recessed inward along the circumference of the valve core. The sealing ring is installed in the sealing groove. Along the radial direction of the valve core, the sealing ring is pressed between the sealing groove and the inner wall forming the valve core channel.

[0029] In this way, the sealing structure can limit the valve core, thereby preventing the valve core from escaping the valve cavity through the opening. In addition, because the sealing surface can cooperate with the edge line of the sealing structure end to form a line seal when the valve core opens the valve port, the line seal has a higher sealing precision, thereby effectively reducing the risk of fluid in the valve cavity leaking between the valve core and the sealing structure when the stop valve is opened. At least a portion of the sealing structure extends into the valve cavity, making the sealing structure smaller in size compared to setting it as a cap covering the outer periphery of the opening, thereby saving materials and reducing production costs, and making the sealing structure occupy less space outside the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. 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.

[0031] FIG1 is a cross-sectional view 1 of a stop valve according to an embodiment of the present application.

[0032] FIG2 is an enlarged schematic diagram of point E in FIG1 .

[0033] FIG3 is a second cross-sectional view of a stop valve according to an embodiment of the present application.

[0034] FIG4 shows a schematic structural diagram of a stop valve provided in an embodiment of the present application.

[0035] FIG5 shows a cross-sectional view of a stop valve provided in an embodiment of the present application.

[0036] FIG6 shows a schematic structural diagram of a blocking member provided in an embodiment of the present application.

[0037] FIG7 shows a bottom view of a blocking member provided in an embodiment of the present application.

[0038] FIG8 shows a cross-sectional view of a blocking member according to an embodiment of the present application.

[0039] FIG9 shows a cross-sectional view of a sealing structure provided by an embodiment of the present application.

[0040] FIG10 is an enlarged schematic diagram of point F in FIG5 .

[0041] FIG11 shows a schematic structural diagram of a stop valve provided in an embodiment of the present application.

[0042] FIG12 shows a cross-sectional view of a stop valve according to an embodiment of the present application.

[0043] FIG13 shows a schematic structural diagram of a blocking member provided in an embodiment of the present application.

[0044] FIG14 shows a front view of a blocking member provided in an embodiment of the present application.

[0045] Reference numerals:

[0046] 100. Stop valve; 10. Valve body; 11. Valve cavity; 12. Valve core channel; 13. Valve port; 14. Opening; 141. First notch portion; 15. Seat body; 16. Sleeve; 20. Valve core; 21. First sealing surface; 22. Contraction section; 221. Operating hole; 30. Sealing structure; 31. Through hole; 311. Through hole edge; 32. First section; 33. Second section; 331. Third sealing surface; 332. Second notch portion; 40. Sealing piece; 401. Avoidance space; 41. Sealing portion; 42. Operating portion; 421. Anti-slip pattern; 411. Second sealing surface; 50. Welding groove; 51. Notch portion; 52. Welding seam; 60. Sealing ring; 70. Sealing groove. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0049] 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 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.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0051] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as 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 of the relevant listed items.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0055] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0056] Please refer to Figures 1 and 2. In order to solve the problem that the valve core may fly out of the opening 14 due to improper installation of the retaining ring of the stop valve, the present application provides a stop valve. The stop valve 100 includes: a valve body 10, having a valve cavity 11, a valve core channel 12 and a valve port 13, and an opening 14 is also provided on the valve body 10; a valve core 20, which is sealed and installed in the valve core channel 12 via the opening 14, and the valve core 20 can move in the valve core channel 12 along the axial direction of the valve core channel 12 to open or close the valve port 13, wherein the axis formed in the axial direction of the valve core channel 12 is parallel to the axis of the valve core channel 12; a sealing structure 30, which is installed at the opening 14, and the sealing structure 30 at least partially extends into the valve core channel 12, and a first sealing surface 21 is provided at one end of the valve core 20 close to the sealing structure 30; wherein, when the valve core 20 is in the first position, the valve core 20 abuts against the valve port 13, and when the valve core 20 is in the second position, the first sealing surface 21 abuts against the end edge line of the sealing structure 30 located in the valve core channel 12.

[0057] In the present application, the valve core 20 can switch between a first position and a second position, thereby switching between the open and closed states of the stop valve 100. Specifically, when the valve core 20 is in the first position, the end of the valve core 20 away from the opening 14 blocks the valve port 13, and the stop valve 100 is in the closed state. When the valve core 20 is in the second position, the stop valve 100 is in the open state, and the first sealing surface 21 on the valve core 20 abuts the end edge line of the sealing structure 30, so that the first sealing surface 21 and the end edge line of the sealing structure 30 form a line seal.

[0058] In this way, the sealing structure 30 can limit the valve core 20, thereby preventing the valve core 20 from escaping the valve core passage 12 through the opening 14. Furthermore, because the first sealing surface 21 can cooperate with the edge line of the end of the sealing structure 30 to form a line seal when the valve core 20 opens the valve port 13, the sealing effect of the line seal is better, thereby effectively reducing the risk of fluid in the valve core passage 12 leaking between the valve core 20 and the sealing structure 30 when the stop valve 100 is opened. At least a portion of the sealing structure 30 extends into the valve core passage 12, replacing the cap form provided on the outer periphery of the opening 14 in related structures. This makes the sealing structure 30 smaller in size, thereby saving materials and reducing production costs, and allows the sealing structure 30 to occupy less space outside the valve body 10.

[0059] In some embodiments, the outer peripheral wall of the valve core 20 is threadedly engaged with the inner wall of the valve core channel 12 , and the valve core 20 is moved and switched between the first position and the second position by screwing the valve core 20 .

[0060] In one embodiment, as shown in Figures 1 and 2, the stop valve 100 also includes a sealing ring 60, and a sealing groove 70 is provided on the outer wall of the valve core 20. The sealing groove 70 is recessed inward along the circumference of the valve core 20. The sealing ring 60 is installed in the sealing groove 70. Along the radial direction of the valve core 20, the sealing ring 60 is pressed between the sealing groove 70 and the inner wall forming the valve core channel 12.

[0061] In this way, the sealing ring 60 can block the gap between the valve core 20 and the inner wall of the valve core channel 12 along the axial direction of the valve core 20, thereby preventing the fluid in the valve core channel 12 from flowing toward the opening 14 through the gap between the valve core 20 and the inner wall of the valve core channel 12.

[0062] When the valve core 20 is in the first position, the end of the valve core 20 away from the opening 14 blocks the valve port 13, and the valve core 20 and the inner wall of the valve core channel 12 are sealed by the sealing ring 60, that is, two seals are formed from the valve core channel 12 to the opening 14, thereby further improving the sealing performance at the opening 14 when the stop valve 100 is closed; when the valve core 20 is in the second position, the valve core 20 and the inner wall of the valve core channel 12 are sealed by the sealing ring 60, and a line seal is formed by the first sealing surface 21 and the end edge line of the sealing structure 30, that is, two seals are formed from the valve core channel 12 to the opening 14, thereby further improving the sealing performance at the opening 14 when the stop valve 100 is opened.

[0063] In one embodiment, as shown in Figures 1 and 2, the sealing structure 30 is provided with a through hole 31 passing through both ends of the sealing structure 30 along the axial direction of the valve core channel 12. The first sealing surface 21 is configured as a conical surface. Along the direction from the valve core 20 to the sealing structure 30, the conical surface is contracted relative to the axis of the valve core 20. When the valve core 20 is in the second position, part of the valve core 20 can extend into the through hole 31 and abut against the edge 311 of the through hole.

[0064] Thus, when the tapered portion extends into the through hole 31 and abuts the edge of the through hole 31, the valve core 20 is simultaneously squeezed by the sealing structure 30 along the axial direction of the valve core 20 and along the radial direction of the valve core 20, thereby ensuring that the sealing structure 30 reliably limits the valve core 20. Furthermore, because the tapered surface provides a larger mating area, the sealing effect between the valve core 20 and the sealing structure 30 is improved.

[0065] The conical surface can be set as an inclined plane or a curved surface.

[0066] Furthermore, in one embodiment, as shown in FIG3 , the angle of the conical surface relative to the axis of the valve core 20 is defined as A, and A satisfies 15°≤A≤75°.

[0067] It is understandable that, when the aperture of the through hole 31 is the same, the smaller the angle A of the conical surface relative to the axis of the valve core 20, the longer the conical surface needs to extend along the axial direction of the valve core 20 to match the aperture of the through hole 31. However, if the angle A of the conical surface relative to the axis of the valve core 20 is too small, the fitting area of ​​the conical surface will be too large, resulting in material waste; the larger the angle A of the conical surface relative to the axis of the valve core 20, the shorter the conical surface needs to extend along the axial direction of the valve core 20 to match the aperture of the through hole 31. However, if the angle A of the conical surface relative to the axis of the valve core 20 is too large, the fitting area of ​​the conical surface will be insufficient, thereby reducing the sealing effect between the sealing structure 30 and the valve core 20. Therefore, by setting 15°≤A≤75°, material waste can be avoided and it is also conducive to ensuring the sealing effect between the sealing structure 30 and the valve core 20. For example, the value of A can be 15°, 20°, 30°, 55°, 60°, 75°, etc. The specific value can be selected according to actual needs and is not listed here one by one.

[0068] In one embodiment, as shown in Figures 1 and 2, the valve core 20 includes an operating hole 221 and a constricted section 22. The constricted section 22 is positioned adjacent to the sealing structure 30. The outer peripheral wall of the constricted section 22 forms a tapered surface. The operating hole 221 is recessed inwardly from the constricted section 22 toward the upper end of the sealing structure 30 along the axis of the valve core passage 12, and the operating hole 221 communicates with the through hole 31. This facilitates machining the tapered surface on the outer peripheral wall of the constricted section 22. Furthermore, because the outer peripheral wall of the valve core 20 is threadedly engaged with the inner wall of the valve core passage 12, the valve core 20 can be switched between a first position and a second position by rotating the valve core 20. Therefore, by providing the operating hole 221, which communicates with the through hole 31, on the end surface of the constricted section 22 facing the sealing structure 30, an operator can insert a wrench through the through hole 31 into the operating hole 221 and rotate the wrench to adjust the position of the valve core 20 in the valve core passage 12. Specifically, the cross section of the operating hole 221 is a regular hexagon to match the shape of a hexagonal wrench.

[0069] In one embodiment, as shown in FIG3 , the minimum outer diameter of the contraction section 22 is defined as D1 , the maximum radial dimension of the operating hole is defined as the inner hexagonal diagonal length of the operating hole 221 is D2 , and D1 and D2 satisfy D2 < D1 ≤ 2D2 .

[0070] Since the operating hole 221 is recessed inwardly from the contraction section 22 toward the upper end surface of the sealing structure 30 along the axial direction of the valve core channel 12 , by setting D1≤2D2 , the wall of the operating hole 221 can be prevented from being too thick, thereby causing material waste.

[0071] In one embodiment, as shown in Figures 1 and 2, the sealing structure 30 includes a first section 32 and a second section 33. The first section 32 is inserted into the valve core channel 12. The diameter of the first section 32 is smaller than the diameter of the second section 33. A step surface is formed between the first section 32 and the second section 33. The first section 32 is inserted into the valve core channel 12, and the step surface is limitedly matched with the exposed end face of the valve body.

[0072] In some embodiments, the second section 33 is welded to the end surface where the opening 14 is located.

[0073] In this way, a step structure can be formed between the first section 32 and the second section 33, and the sealing structure 30 is clamped on the end face of the opening 14 through the step structure, thereby facilitating the assembly and positioning of the sealing structure 30 and the valve body 10 before welding, and is conducive to increasing the welding area between the sealing structure 30 and the valve body.

[0074] In this embodiment, the valve core 20 is first installed into the valve core passage 12 through the opening 14, and then the sealing structure 30 is clamped on the end surface of the opening 14 through the step structure. Finally, the sealing structure 30 is welded to the valve body 10. Specifically, laser welding can be used.

[0075] Furthermore, in one embodiment, as shown in FIG2 , at least one of the end portions where the second section 33 and the opening 14 are located is provided with a notch portion 51 , and the notch portion 51 is chamfered so that the second section 33 and the end surface where the opening 14 are located overlap to form a welding groove 50 , and a weld 52 is formed at the overlap, and the welding groove 50 is filled with solder.

[0076] By providing the welding groove 50 and filling it with solder, the welding area between the valve body 10 and the sealing structure 30 is increased. Furthermore, the molten solder penetrates the weld 52, thereby improving the strength of the weld between the sealing structure 30 and the valve body 10. Furthermore, the welding groove 50 is recessed inwardly, which ensures that the surface of the solder does not protrude from the valve body 10 and the sealing structure 30, thereby enhancing the appearance of the stop valve 100.

[0077] Furthermore, in one embodiment, as shown in FIG2 , the welding groove 50 is an annular groove extending along the circumference of the stop valve 100. A first notch 141 is defined at the end where the opening 14 is located, and a second notch 332 is defined at the second section 33. The welding groove 50 is formed between the first notch 141 and the second notch 332.

[0078] In one embodiment, the first sealing surface 21 is configured as a conical surface, and along the direction from the valve core 20 to the sealing structure 30, the conical surface is expanded relative to the axis of the valve core 20. When the valve core 20 is in the second position, part of the conical surface is located on the outer periphery of the first section 32, and the outer edge line of the first section 32 abuts against the conical surface.

[0079] As shown in Figures 4 and 5 , in some embodiments, the stop valve 100 of the present application further includes a blocking member 40. At least a portion of the blocking member 40 is disposed in the through hole 31 and is threadedly engaged with the through hole 31.

[0080] In the related art, it is necessary to provide an external thread structure on the outer wall of the valve core channel 12. Applying the technical solution of the present application, the sealing structure 30 is provided at the end of the valve core channel 12 away from the valve cavity 11, and at least a portion of the blocking member 40 is passed through the through hole 31 of the sealing structure 30, and the blocking member 40 and the sealing structure 30 are threadedly matched to achieve the blocking of the valve core channel 12. In the present application, there is no need to provide an external thread structure on the outer wall of the valve core channel 12, that is, there is no need to change the wall thickness of the valve core channel 12. In the present application, the provision of the sealing structure 30 and the blocking member 40 avoids the problem of providing an external thread structure on the outer wall of the valve core channel 12 in the traditional technical solution, thereby ensuring the wall thickness of the valve core channel 12. Compared with the related art, the provision of the present application improves the structural strength of the valve core channel 12.

[0081] As shown in FIG2 , in this embodiment, the blocking member 40 includes a blocking portion 41 and an operating portion 42 that are interconnected. At least a portion of the blocking portion 41 is inserted into the through hole 31 and is threadedly engaged with the through hole 31; the operating portion 42 is connected to the blocking portion 41, and the outer surface of the operating portion 42 is provided with anti-slip grooves 421 that protrude outward or are recessed inward from the outer surface. Specifically, when the through hole 31 is blocked by the blocking member 40, the staff member holds the operating portion 42, inserts the blocking portion 41 into the through hole 31, and tightens the blocking member 40. The provision of the anti-slip grooves 421 can increase the friction between the staff member's hand and the blocking member 40, facilitate operation, and facilitate control of the magnitude of the torque applied to the blocking member 40, thereby reducing the situation where the blocking member 40 is screwed too tight and damages the sealing structure 30 or the blocking member 40, and also reduces the situation where the blocking member 40 is screwed too loose and causes the blocking member 40 to separate from the sealing structure 30.

[0082] The present solution does not limit the specific structure of the anti-slip lines 421 , as long as the friction between the operating portion 42 and the operator's hand can be increased.

[0083] In some embodiments of the present solution, the anti-slip pattern 421 includes a wave-shaped raised structure, which is formed in a ring shape on the outer peripheral surface of the operating portion 42 along the circumference of the operating portion 42 .

[0084] In other embodiments of this solution, the anti-slip pattern 421 can be configured as a longitudinal pattern, a staggered pattern, a diagonal pattern, a dot pattern, or the like. In this embodiment, the anti-slip pattern 421 is configured as a knurled pattern. The configuration of the anti-slip pattern 421 facilitates the operator's screwing of the plugging member 40.

[0085] This solution does not limit the specific distribution of the operating portion 42 and the blocking portion 41 .

[0086] As shown in Figures 5 to 8 , in this embodiment, the operating portion 42 is disposed in an annular shape along the circumference of the blocking portion 41 and on the outside of the blocking portion 41, with an escape space 401 formed between the operating portion 42 and the blocking portion 41. At least a portion of the sealing structure 30 is disposed within the escape space 401, and / or a portion of the valve body 10 corresponding to the end of the valve core passage 12 distal from the valve port 13 is disposed within the escape space 401. The annular arrangement of the operating portion 42 along the circumference of the blocking portion 41 and on the outside of the blocking portion 41 reduces the overall height of the blocking member 40.

[0087] In the embodiment of this solution, the valve body 10 includes a seat 15 and a sleeve 16 that are interconnected. The valve cavity 11 and valve port 13 are both provided on the seat 15, and the valve core passage 12 is provided on the sleeve 16. One end of the sealing structure 30 is provided within the valve core passage 12, and the other end of the sealing structure 30 is provided within the escape space 401. The end of the sleeve 16 away from the seat 15 is also provided within the escape space 401. This arrangement enables the blocking member 40 to achieve a double seal at the through hole 31, thereby improving the sealing effect of the through hole 31.

[0088] Specifically, the sealing structure 30 includes a first section 32 and a second section 33 arranged sequentially along the axial direction. The diameter of the first section 32 is smaller than that of the second section 33, and a stepped surface is formed between the first section 32 and the second section 33. The first section 32 is disposed within the valve core passage 12, and the stepped surface is engaged with the end surface of the valve body 10 axially away from the valve port 13. In this embodiment, the stepped surface is engaged with the end surface of the sleeve 16 axially away from the seat 15. This arrangement can limit the position of the sealing structure 30 relative to the sleeve 16 in the axial direction, thereby improving the stability of the sealing structure 30. Furthermore, the above arrangement is simple in structure and facilitates assembly of the sealing structure 30 with the sleeve 16.

[0089] Furthermore, the outer diameter of the second section 33 is equal to the outer diameter of the sleeve 16. This configuration can improve the smoothness of the second section 33 and the sleeve 16 passing through the avoidance space 401.

[0090] As shown in Figures 5, 8, and 9, the sidewall of the blocking portion 41 further includes a second sealing surface 411, the diameter of which gradually increases axially away from the valve port 13. A third sealing surface 331 is provided at one end of the sealing structure 30 axially away from the valve port 13, the diameter of which gradually increases toward the direction away from the valve port 13. The second sealing surface 411 and the third sealing surface 331 are in contact with each other. The provision of the second sealing surface 411 and the third sealing surface 331 further enhances the sealing effect between the blocking member 40 and the sealing structure 30.

[0091] In some embodiments of the present scheme, the angle between the second sealing surface 411 and the axis of the valve core channel is defined as B, and the angle between the third sealing surface and the axis of the valve core channel is defined as C. When the angle B between the second sealing surface 411 and the axis of the valve core channel is not equal to the angle C between the third sealing surface and the axis of the valve core channel, the second sealing surface 411 and the third sealing surface are linearly sealed.

[0092] In some embodiments of the present application, when the angle B between the second sealing surface 411 and the axis of the valve core passage is equal to the angle C between the third sealing surface and the axis of the valve core passage, the second sealing surface 411 and the third sealing surface 331 form a surface seal. This arrangement can further enhance the sealing effect between the second sealing surface 411 and the third sealing surface 331.

[0093] Furthermore, the through hole 31 is internally threaded. The major diameter of the internal thread is defined as D3, and the diameter of the valve core passage 12 is defined as D4. D3 and D4 satisfy the following relationship: D3 < D4. An operating hole 221 is provided on the end surface of the valve core 20, distal from the valve port 13. Operating hole 221 is for inserting an operating tool. The maximum radial dimension of operating hole 221 is defined as D2, and the minor diameter of the internal thread is defined as D5. These two dimensions satisfy the following relationship: D2 < D5. This arrangement facilitates inserting tools into the sleeve 16.

[0094] This solution does not limit the specific shape of the operation hole 221. The operation hole 221 can be configured as a polygonal structure, specifically a quadrilateral, pentagonal or hexagonal structure.

[0095] As shown in Figures 11 to 14, the second embodiment of the present application provides a shut-off valve 100. This differs from the first embodiment in that, in this embodiment, the operating portion 42 and the blocking portion 41 are arranged along the axis of the blocking portion 41. This arrangement simplifies the structure and facilitates machining of the blocking member. Furthermore, the blocking member 40 of this embodiment has a high structural strength and is not easily deformed.

[0096] In this embodiment, the operating portion 42 is a cylindrical structure, and its diameter is larger than the major diameter of the external thread structure of the blocking portion 41. The second sealing surface 411 is located at the connection position between the blocking portion 41 and the operating portion 42.

[0097] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0098] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

[0099] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0100] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A stop valve, characterized in that: include: A valve body, comprising a valve cavity, a valve core passage, a valve port and an opening, wherein the opening is arranged at an end of the valve body away from the valve port; A valve core is installed in the valve core channel through the open seal, and the valve core can move along the axial direction of the valve core channel, and the valve core can open or block the valve port to realize the opening and closing of the valve cavity; A sealing structure is arranged at the opening, and at least part of the sealing structure extends into the valve core channel, and a first sealing surface is arranged at one end of the valve core close to the sealing structure; When the valve core is in the first position, the valve core abuts against the valve port and the valve core blocks the valve port. When the valve core is in the second position, the first sealing surface abuts against the end edge line of the sealing structure located in the valve core channel and the valve core opens the valve port.

2. The stop valve according to claim 1, wherein: The sealing structure is provided with through holes passing through both ends of the sealing structure along the axial direction of the valve core channel. The first sealing surface is configured as a conical surface. Along the direction from the valve core to the sealing structure, the conical surface is contracted relative to the axis of the valve core channel. When the valve core is in the second position, part of the valve core extends into the through hole, and the first sealing surface abuts against the edge of the through hole.

3. The stop valve according to claim 2, wherein: An angle between the conical surface and the valve body axis is defined as A, and A satisfies 15°≤A≤75°.

4. The stop valve according to claim 2 or 3, wherein: The valve core includes an operating hole and a contraction section, the contraction section is arranged close to the sealing structure, the outer peripheral wall of the contraction section forms the conical surface, the operating hole is recessed inward from the contraction section toward the upper end surface of the sealing structure along the axial direction of the valve core channel, and the operating hole is connected to the through hole.

5. The stop valve according to claim 4, wherein: The minimum outer diameter of the contraction section is defined as D1, the maximum radial dimension of the operation hole is defined as D2, and D1 and D2 satisfy D2<D1≤2D2.

6. The stop valve according to claim 1, wherein: The sealing structure includes a first section and a second section, the diameter of the first section is smaller than the diameter of the second section, a step surface is formed between the first section and the second section, the first section is inserted into the valve core channel, and the step surface is limitedly matched with the open end surface of the valve body.

7. The stop valve according to claim 6, wherein: The second section is welded to the end face where the opening is located, and the second section overlaps the end face where the opening is located along the axial direction of the valve core channel and is welded to the end face where the opening is located, and at least one of the second section and the end face where the opening is located is provided with a notch, and the notch is chamfered so that the second section overlaps the end face where the opening is located to form a welding groove, and a weld is formed at the overlap, and the welding groove is filled with solder; optionally, The end portion where the opening is located is provided with a first notch portion, the second section is provided with a second notch portion, and the welding groove is formed between the first notch portion and the second notch portion.

8. The stop valve according to claim 6, wherein: The first sealing surface is configured as a conical surface, and along the direction from the valve core to the sealing structure, the conical surface is expanded relative to the axis of the valve core. When the valve core is in the second position, part of the conical surface is located at the outer periphery of the first section, and the outer edge line of the first section abuts against the conical surface.

9. The stop valve according to claim 1, wherein: The sealing structure includes through holes penetrating both ends of the valve core channel along the axial direction of the valve core channel, and the stop valve also includes a plugging member, at least part of which is inserted into the through hole and matched with the through hole thread.

10. The stop valve according to claim 9, wherein: The blocking member comprises: A blocking portion, at least a portion of which is disposed in the through hole and is threadedly engaged with the through hole; The operating part is connected to the blocking part, the outer surface of the operating part is provided with anti-slip lines protruding outward or recessed inward from the outer surface, and the operating part and the blocking part are distributed along the axial direction of the blocking part.

11. The stop valve according to claim 10, wherein: The operating portion is arranged in an annular manner on the outer side of the blocking portion along the circumference of the blocking portion, and a clearance space is formed between the operating portion and the blocking portion; At least part of the sealing structure is arranged in the avoidance space, and / or a part of the valve body corresponding to an end of the valve core channel away from the valve port is arranged in the avoidance space.

12. The stop valve according to claim 10, wherein: The side wall of the blocking portion comprises a second sealing surface, the diameter of which gradually increases along the axial direction of the valve body in a direction away from the valve port; A third sealing surface is provided at one end of the sealing structure away from the valve port, and a diameter of the third sealing surface gradually increases along the axial direction of the valve body toward a direction away from the valve port, and a seal is formed between the second sealing surface and the third sealing surface.

13. The stop valve according to claim 12, wherein: The angle between the second sealing surface and the axis of the valve core channel is defined as B, and the angle between the third sealing surface and the axis of the valve core channel is defined as C. When the angle B between the second sealing surface and the axis of the valve core channel is not equal to the angle C between the third sealing surface and the axis of the valve core channel, the second sealing surface is linearly sealed with the third sealing surface.

14. The stop valve according to claim 12, wherein: The angle between the second sealing surface and the axis of the valve core channel is defined as B, and the angle between the third sealing surface and the axis of the valve core channel is defined as C. When the angle B between the second sealing surface and the axis of the valve core passage is equal to the angle C between the third sealing surface and the axis of the valve core passage, the second sealing surface is surface-sealed with the third sealing surface.

15. The stop valve according to claim 9, wherein: The hole wall of the through hole is provided with an internal thread, the major diameter of the internal thread is defined as D3, the diameter of the valve core channel is defined as D4, D3 and D4 satisfy the following relationship: D3<D4; and, An operating hole is provided on the end surface of the valve core away from the valve port, and the operating hole is used for passing an operating tool. The maximum radial dimension of the operating hole is defined as D2, and the thread minor diameter dimension of the internal thread is defined as D5. D2 and D5 satisfy the following relationship: D2<D5.

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