Stop valve

Abstract

The stop valve comprises a valve body, a flow adjusting assembly and a first filtering structure, the valve body is provided with an axial valve cavity, and a limiting part is arranged on the cavity wall of the valve cavity in a protruding mode; the flow adjusting assembly abuts against the limiting part. The flow adjusting assembly is detachably connected with the cavity wall of the valve cavity, and a first crimping part is constructed at the end, away from the limiting part in the axial direction, of the flow adjusting assembly. The first filtering structure is provided with a first connecting part, and the first filtering structure is pressed on the first crimping part through the first connecting part. By means of the mode that the flow adjusting assembly is detachably connected with the cavity wall of the valve cavity and the mode that the first filtering structure is assembled on the flow adjusting assembly in a compression joint mode, the flow adjusting assembly does not need to be limited to a high-temperature-resistant material when being made of a manufacturing material, the selection range of the material is widened, and cost reduction is facilitated. And if the flow adjusting assembly has a quality problem, the flow adjusting assembly can be timely disassembled without scrapping the whole stop valve.

Description

Technical Field

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

[0002] A globe valve with a throttling function controls the flow of fluid through the movement of the valve stem. A throttling assembly is installed within the valve cavity of the valve body to achieve this throttling effect. The throttling assembly includes a throttling valve core. To prevent the throttling valve core from being clogged by impurities, a filter structure is also installed within the valve cavity. In related technologies, both the throttling assembly and the filter structure are welded to the inner wall of the valve body, forming the valve cavity. The throttling assembly is subject to the high temperatures generated by welding, requiring high heat resistance from the material. Furthermore, if the throttling assembly exhibits quality issues such as poor welding, the entire globe valve must usually be scrapped, increasing production costs. Utility Model Content

[0003] Based on this, it is necessary to provide a stop valve to reduce production costs in response to the above technical problems.

[0004] The stop valve includes a valve body, a flow regulating assembly and a first filtering structure; the valve body is provided with an axial valve cavity, and the cavity wall of the valve cavity is convexly provided with a limiting portion; the flow regulating assembly is abutted against the limiting portion; the flow regulating assembly is detachably connected to the cavity wall of the valve cavity, and the flow regulating assembly is configured with a first crimping portion at one end away from the limiting portion along the axial direction; the first filtering structure is provided with a first connecting portion, and the first filtering structure is press-fitted to the first crimping portion through the first connecting portion.

[0005] It is understandable that the valve body is provided with a valve cavity that can provide assembly space for at least the flow regulating component and the first filter structure. Furthermore, the first filter structure can filter out impurities to prevent fluid impurities from affecting the normal operation of the flow regulating component; during the flow of the fluid, the flow regulating component acts as a throttling agent on the fluid to limit the flow of the fluid. The flow regulating component is detachably connected to the valve cavity to fix the position of the flow regulating component, which is convenient for disassembly and assembly. At the same time, the flow regulating component can crimp the first filter structure through the first crimping portion, so that the first filter structure and the flow regulating component form an integrated structure. The detachable connection between the flow regulating component and the valve cavity wall and the crimping assembly of the first filter structure to the flow regulating component make it unnecessary to limit the selection of high-temperature resistant materials when selecting manufacturing materials for the flow regulating component, thereby expanding the range of material selection and helping to reduce costs. If there is a quality problem with the flow regulating component, it can also be disassembled in time without scrapping the entire stop valve.

[0006] In one embodiment, the flow regulating assembly includes a valve seat and a valve core, the valve seat is detachably connected to the valve chamber wall, the valve seat is configured with an accommodating cavity, and the valve core is movably installed in the accommodating cavity; the valve seat is provided with an opening on the side facing the first filtering structure, the opening is connected to the accommodating cavity, the edge of the opening forms the first crimping portion, and the first crimping portion presses the first connecting portion against the end face where the edge of the opening is located.

[0007] It can be understood that the valve seat is provided with a receiving cavity to provide space for the movement of the valve core, and a first crimping portion is provided at the opening of the valve seat to facilitate crimping the first filtering structure to the opening, which is beneficial to filtering the fluid entering the receiving cavity from the opening and can limit the movement of the valve core.

[0008] In one embodiment, the first crimping portion has a first limiting section and a second limiting section connected to the first limiting section, and the second limiting section is arranged at an angle relative to the first limiting section; along the axial direction of the valve cavity, the first limiting section is formed by protruding outward from the end surface of the valve seat at the opening, and along the radial direction of the valve cavity, the first limiting section is limited to the first connecting portion; the second limiting section extends from the first limiting section toward the opening, and along the axial direction of the valve cavity, the second limiting section presses the first connecting portion against the end surface where the edge of the opening is located.

[0009] It can be understood that the first limiting section has a limiting effect on the first connection part along the radial direction of the valve cavity, and the second limiting section has a limiting effect on the first connection part along the axial direction of the valve cavity. The first connection part can be crimped and assembled to the flow regulating assembly through the first limiting section and the second limiting section.

[0010] In one embodiment, the first crimping portion is protruded outward from the end surface of the opening to form a curved structure, and the curved structure extends toward the opening and presses the first connecting portion against the end surface where the edge of the opening is located.

[0011] It is understandable that the curved structure can also limit the first connecting portion in the axial and radial directions of the valve cavity, and the curved structure has a smooth surface which can also reduce the wear on the first connecting portion.

[0012] In one embodiment, the valve body has an assembly end and a connecting end spaced apart along the axial direction, and the limiting portion is provided between the assembly end and the connecting end; the stop valve also includes a second filter structure, which can be assembled into the valve cavity from the connecting end; the flow regulating assembly can extend into the valve cavity from the assembly end.

[0013] It is understood that the addition of a second filter structure to filter the fluid entering the valve cavity protects the normal operation of the internal components of the valve cavity. During assembly, the second filter structure is first installed into the valve cavity from the connection end, and then the first filter structure and flow control assembly are assembled into one body. This integrated structure is then installed into the valve cavity from the assembly end. This arrangement prevents the installation of the second filter structure from affecting the flow control assembly.

[0014] In one embodiment, the stop valve further includes a first connecting pipe, which is assembled on the connecting end; the second filter structure is constructed with a second connecting portion, which is assembled on the first connecting pipe or between the first connecting pipe and the valve body.

[0015] It can be understood that the connection between the first connecting pipe and the valve body facilitates the fluid transmission between the valve body and the external pipe fitting, and is beneficial to the assembly and fixation of the second filtering structure.

[0016] In one embodiment, the connecting end is formed with a first opening connected to the valve cavity; the first connecting pipe passes through the first opening and is inserted into the valve cavity; along the axial direction of the valve cavity, the second connecting portion is located between the first connecting pipe and the limiting portion, and the second connecting portion is welded to at least the first connecting pipe or the limiting portion; or, the second connecting portion is interference fit with the first connecting pipe, and the first connecting pipe abuts against the limiting portion.

[0017] It is understood that inserting the first connecting pipe into the valve body helps reduce external space usage. The second connecting portion is positioned between the first connecting pipe and the stopper, allowing both the first connecting pipe and the stopper to limit the valve core's axial position. The welded connection is secure and reliable. Alternatively, the second connecting portion and the first connecting pipe can be secured to the second filter structure using an interference fit to prevent the second filter structure from contracting and falling out of the first connecting pipe due to the supercooled fluid.

[0018] In one embodiment, a connecting section is formed on the side wall of the valve body, a fluid channel connected to the valve cavity is constructed in the connecting section, a second port is provided at the end of the connecting section, and the second port is connected to the fluid channel; the stop valve also includes a third filter structure, the third filter structure is located in the fluid channel, the third filter structure has a third connecting portion, and the third connecting portion is interference fit with the connecting section.

[0019] It is understood that the connection section is provided to facilitate connection with external piping, facilitating fluid transport. A third filter structure is provided at the second port to filter fluid entering the fluid channel from the second port, preventing impurities from entering the valve chamber and causing interference. The interference fit between the third connecting portion and the connection section facilitates the stable assembly of the third filter structure, preventing it from shrinking in the third fluid channel due to supercooling of the fluid.

[0020] In one embodiment, the third filter structure is completely located in the fluid channel; the end of the connecting section at the second opening is bent toward the fluid channel to form a second crimping portion, and the second crimping portion abuts against the third filter structure.

[0021] It can be understood that the provision of the second crimping portion can further prevent the third filter structure from falling off from the fluid channel.

[0022] In one embodiment, the inner wall of the connecting section is recessed inward to form a first groove; the stop valve also includes a first limiting member installed in the first groove, a part of the structure of the first limiting member extends out of the first groove and can form abutment with the third filter structure, and the first limiting member is located between the third filter structure and the second opening.

[0023] It can be understood that the provision of the first slot facilitates the stable assembly of the first limiting member, and the first limiting member can restrict the third filter structure from escaping from the second opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A cross-sectional view of an embodiment of a stop valve provided in this application;

[0026] Figure 2 for Figure 1 A partial enlarged view of an embodiment;

[0027] Figure 3 for Figure 1 A partial enlarged view of another embodiment;

[0028] Figure 4 for Figure 1 A partial enlarged view of point B in the middle;

[0029] Figure 5A cross-sectional view of another embodiment of the stop valve provided in this application;

[0030] Figure 6 for Figure 5 A partial enlarged view of an embodiment at C in the middle;

[0031] Figure 7 for Figure 5 A partially enlarged view of another embodiment at point C in the middle.

[0032] Explanation of reference numerals: 100, stop valve; 10, valve body; 101, valve chamber; 102, first port; 103, second port; 104, assembly end; 105, connection end; 11, limit portion; 12, second slot; 13, connection section; 131, fluid channel; 132, second crimping portion; 133, first slot; 20, flow regulating assembly; 21, valve seat; 211, accommodating chamber; 212, opening; 213, first crimping portion; 2131, second A limiting section; 2132, a second limiting section; 214, a first throttling hole; 22, a valve core; 221, a second throttling hole; 31, a first filtering structure; 311, a first connecting part; 312, a first filter screen; 32, a second filtering structure; 321, a second connecting part; 33, a third filtering structure; 331, a third connecting part; 41, a first connecting pipe; 42, a second connecting pipe; 43, a connecting head; 51, a first limiting member; 52, a second limiting member; 60, a valve stem assembly. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0035] In this document, spatially related terms such as "upper" and "lower" are defined with reference to the accompanying drawings. Therefore, it will be understood that "upper" and "lower" are used interchangeably. It will be understood that when a layer is referred to as being "on" another layer, it can be directly formed on the other layer, or intervening layers may also be present. Therefore, it will be understood that when a layer is referred to as being "directly on" another layer, there are no intervening layers therebetween.

[0036] In the drawings, the dimensions of layers and regions may be exaggerated for clarity. It will be understood that when a layer or element is referred to as being "on" another layer or substrate, the layer or element may be directly on the other layer or substrate, or intervening layers may be present. Additionally, it will be understood that when a layer is referred to as being "between" two layers, the layer may be the only layer between the two layers, or one or more intervening layers may be present. Like reference numerals refer to like elements throughout.

[0037] Hereinafter, although terms such as "first," "second," and the like may be used to describe various components, these components are not limited to the above terms. The above terms are used only to distinguish one component from another. It will also be understood that expressions used in the singular include plural expressions, unless the singular expression has a significantly different meaning in the context. In addition, in the following embodiments, it will also be understood that the terms "including" and / or "having" used herein indicate the presence of the stated features or components, but do not exclude the presence or addition of one or more other features or components.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0040] See also Figures 1 to 7 The present application provides a stop valve 100 comprising a valve body 10, a flow control assembly 20, and a first filter structure 31. The valve body 10 is provided with an axially oriented valve cavity 101. The valve cavity 101 provides assembly space for the flow control assembly 20 and the first filter structure 31. The flow control assembly 20 can adjust the flow rate of the output fluid to meet actual demand. The first filter structure 31 can filter the fluid to reduce the interference of impurities on the normal operation of the flow control assembly 20.

[0041] Furthermore, a limiting portion 11 is protruding from the inner surface of the cavity wall of the valve cavity 101, and the flow regulating assembly 20 is abutted against the limiting portion 11. The limiting portion 11 has the function of limiting and supporting the flow regulating assembly 20, and is used for rapid assembly and positioning of the flow regulating assembly 20.

[0042] In a further embodiment, the flow regulating assembly 20 is detachably connected to the wall of the valve cavity 101. This arrangement facilitates removal of the flow regulating assembly 20 from the valve body 10. If quality issues arise with the flow regulating assembly 20, only the flow regulating assembly 20 needs to be replaced, without having to scrap the entire stop valve 100, thereby reducing production costs. The flow regulating assembly 20 does not need to be welded to the valve body 10, thus avoiding the effects of high temperatures, such as those caused by welding, on the flow regulating assembly 20. The flow regulating assembly 20 need not be manufactured using only heat-resistant materials, thus expanding the range of materials available and reducing production costs.

[0043] like Figures 1 to 3 As shown, the flow regulating assembly 20 further comprises a first crimping portion 213 on one end thereof, axially away from the limiting portion 11. The first filter structure 31 is provided with a first connecting portion 311, which is press-fitted onto the first crimping portion 213 via the first connecting portion 311. During assembly, the first connecting portion 311 is first placed onto the first crimping portion 213, and then crimped and secured via the first crimping portion 213, simplifying the process. This arrangement also ensures that the first filter structure 31 and the flow regulating assembly 20 form an integrated structure.

[0044] When assembling the stop valve 100, the first filter structure 31 and the flow regulating assembly 20 are assembled first, and the integrated structure formed by the two is assembled into the valve cavity 101 at the same time. There is no need to assemble them one by one in the valve cavity 101, which helps to improve assembly efficiency.

[0045] In summary, through the two connection methods of detachable connection between the flow regulating component 20 and the valve chamber 101 and crimping between the flow regulating component 20 and the first filter structure 31, high temperature can be avoided during connection, which is beneficial to protecting the structure of the flow regulating component 20 and reducing the requirements for the material of the flow regulating component 20, that is, the flow regulating component 20 does not need to use high-temperature resistant materials, which expands the range of material selection and helps reduce production costs.

[0046] like Figure 1 and Figure 5As shown, in an optional embodiment, the valve body 10 has an assembly end 104 and a connecting end 105 axially spaced apart along the valve cavity 101, a limiting portion 11 is provided between the assembly end 104 and the connecting end 105, and the connecting end 105 is formed with a first opening 102, which is connected to the valve cavity 101; the stop valve also includes a second filter structure 32, and the second filter structure 32 can be assembled into the valve cavity 101 from the connecting end 105; the flow regulating assembly 20 can extend into the valve cavity 101 from the assembly end 104.

[0047] That is, the second filter structure 32 is assembled at the first opening 102 and filters the fluid entering the valve cavity 101 through the first opening 102, preventing impurities from entering the valve cavity 101 through the first opening 102, thereby protecting the internal structure of the valve cavity 101. Specifically, the second filter structure 32 is located near the side of the stopper 11 axially away from the flow control assembly 20 along the valve cavity 101. In this way, when the second filter structure 32 is welded, the stopper 11 can isolate the second filter structure 32 from the high temperature generated during welding, thereby protecting the structure of the flow control assembly 20.

[0048] During assembly, the second filter structure 32 can be first assembled into the valve cavity 101 from the connection end 105, and then the flow regulating component 20 can be installed into the valve cavity 101 from the assembly end 104. This arrangement can further avoid the adverse effects of the heat generated during the assembly and welding of the second filter structure 32 on the flow regulating component 20.

[0049] like Figure 1 and Figure 5 As shown, in an optional embodiment, the stop valve 100 further includes a valve stem assembly 60. The valve stem assembly 60 is assembled within the valve cavity 101 and is capable of reciprocating axially along the valve cavity 101 to switch the flow state of the fluid. When the valve stem assembly 60 moves to block the second opening 103, the first opening 102 and the second opening 103 are disconnected, thereby shutting off the fluid. When the valve stem assembly 60 moves away from the second opening 103, the second opening 103 is connected to the first opening 102, allowing the fluid to flow smoothly.

[0050] like Figure 1 and Figure 5 As shown, in a further embodiment, the wall of the valve cavity 101 is recessed near the assembly end 104 to form a second retaining groove 12; the stop valve 100 further includes a second stopper 52, which is assembled in the second retaining groove 12 and extends from the second retaining groove 12. The second stopper 52 can abut against the valve stem assembly 60 to limit the movement of the valve stem assembly 60 and prevent the valve stem assembly 60 from disengaging from the assembly end 104. Exemplarily, the second retaining groove 12 is configured as an annular groove, and correspondingly, the second stopper 52 is configured as a retaining ring.

[0051] like Figure 1 and Figure 5 As shown, in an optional embodiment, the flow regulating assembly 20 includes a valve seat 21 and a valve core 22. The valve seat 21 is detachably connected to the wall of the valve cavity 101. The valve seat 21 is constructed with a receiving cavity 211. The valve core 22 is movably installed in the receiving cavity 211. The flow rate is regulated by the movement of the valve core 22. Specifically, the valve seat 21 is provided with an opening 212 on the side facing the first filter structure 31. The opening 212 is connected to the receiving cavity 211. The edge of the opening 212 forms a first crimping portion 213. The first crimping portion 213 presses the first connecting portion 311 against the end face where the edge of the opening 212 is located. In this arrangement, the first filter structure 31 is assembled at the opening 212. While filtering the fluid, the first filter structure 31 can also limit the movement of the valve core 22 to prevent the valve core 22 from separating from the valve seat 21 at the opening 212.

[0052] For example, the valve seat 21 is interference fit with the wall of the valve cavity 101, and the detachable connection is achieved by controlling the interference. Of course, the valve seat 21 can also be detachable with the valve cavity 101 by other means such as snap connection, which is only illustrated here.

[0053] like Figure 1 and Figure 5 As shown, in a specific embodiment, a first throttling hole 214 is constructed at one end of the valve seat 21 close to the first opening 102, and the first throttling hole 214 is connected to the accommodating cavity; the valve core 22 is constructed with a second throttling hole 221, and the second throttling hole 221 axially passes through the valve core 22 along the valve cavity 101; the valve core 22 can move axially along the valve seat 21 to switch the docking state of the second throttling hole 221 and the first throttling hole 214.

[0054] With this arrangement, both the valve seat 21 and the valve core 22 can throttle the fluid. Specifically, when the fluid flows from the first opening 102 toward the second opening 103, the first throttle hole 214 throttles the fluid, controlling the flow rate of the fluid entering the accommodating chamber 211 and buffering the fluid in the accommodating chamber 211. When the fluid flow rate is large enough, the fluid can push the valve core 22 away from the first throttle hole 214, and the second throttle hole 221 does not connect with the first throttle hole 214. The fluid then flows out of the accommodating chamber 211 through the opening 212, enters the valve cavity 101, and then flows out of the second opening 103.

[0055] When the fluid flows from the second opening 103 toward the first opening 102, the fluid enters the accommodating chamber 211 from the opening 212, and the fluid can push the valve core 22 to move toward the first throttling hole 214, so that the second throttling hole 221 is docked with the first throttling hole 214. The fluid enters the second throttling hole 221 from the accommodating chamber 211, and then flows out from the first throttling hole 214 to the first connecting pipe 41.

[0056] like Figure 2As shown, in one embodiment, the first crimping portion 213 has a first limiting section 2131 and a second limiting section 2132 connected to the first limiting section 2131, and the second limiting section 2132 is arranged at an angle relative to the first limiting section 2131; the first limiting section 2131 is formed by protruding outward from the end face of the valve seat 21 at the opening 212 along the axial direction of the valve cavity 101, and along the radial direction of the valve cavity 101, the first limiting section 2131 is limited to the first connection part 311 to limit the radial movement of the first connection part 311 along the valve cavity 101; the second limiting section 2132 extends from the first limiting section 2131 toward the opening 212, and along the axial direction of the valve cavity 101, the second limiting section 2132 presses the first connection part 311 against the end face where the edge of the opening 212 is located to limit the axial movement of the first connection part 311.

[0057] That is to say, the crimping assembly of the first connection part 311 is achieved through the cooperation of the first limiting section 2131 and the second limiting section 2132, which is easy to operate. When connecting, the first connection part 311 is first abutted against the first limiting section 2131, and then the second limiting section 2132 is pressed against the first connection part 311 by external force, so that the first connection part 311 is positioned between the second limiting section 2132 and the end face where the edge of the opening 212 is located.

[0058] like Figure 3 As shown, in other embodiments, the first crimping portion 213 is protruded outward from the end surface at the opening 212 to form a curved structure. The curved structure extends toward the opening 212 and presses the first connection portion 311 against the end surface where the edge of the opening 212 is located. The curved structure forms an axial and radial limit for the first connection portion 311 along the valve cavity 101 to limit the movement of the first connection portion 311. The smooth surface of the curved structure can reduce the wear on the first connection portion 311, and the curved structure can reduce stress concentration to withstand a greater crimping force and promote the assembly stability of the first connection portion 311. During assembly, the first connection portion 311 is first abutted against the root of the curved structure, and then the curved structure is deformed toward the opening 212 by an external force, thereby achieving compression and fixation of the first connection portion 311 so that the first connection portion 311 will not loosen.

[0059] For example, the first crimping portion 213 can be pressed and fixed to the first connecting portion 311 by riveting. The flow regulating assembly 20 does not need to use high-temperature resistant materials, and the riveting method is fast and simple, which helps to improve production efficiency.

[0060] like Figures 1 to 3As shown, in some embodiments, the first filter structure 31 includes a first filter 312, which is connected to the first connecting portion 311 and performs a filtering function. Furthermore, the first filter structure 31 includes a first clamping member, the outer surface of which forms the first connecting portion 311. The first clamping member is configured with a first clamping groove, which can accommodate the first filter 312 and clamp the edge of the first filter 312. During assembly, the edge of the first filter 312 is first inserted into the first clamping groove, and the groove walls of the first clamping groove are brought closer together by external force to clamp the first filter 312, thereby fixing the first filter 312.

[0061] In further embodiments, the first filter screen 312 is configured as a mesh surface extending radially and flatly along the valve cavity 101, resulting in a simple structure and ease of fabrication. In other embodiments, the first filter screen 312 is configured to protrude axially from the valve cavity 101, away from the valve seat 21, to avoid interference with the valve seat 21 and to increase the filtration area of ​​the first filter screen 312, thereby enhancing the filtration effect. More specifically, the mesh surface of the first filter screen 312 can be configured as a smooth curved surface to optimize flow direction and increase fluid flow.

[0062] like Figure 1 and Figure 5 As shown, in an optional embodiment, the stop valve further includes a first connecting pipe 41, which is assembled at the first opening 102 and connected to the connecting end 105, so that the valve body 10 can be connected to an external pipe through the first connecting pipe 41. Exemplarily, the first connecting pipe 41 and the connecting end 105 are connected by welding, which is firm, reliable, and easy to operate.

[0063] like Figure 4 As shown, further, the second filtering structure 32 is constructed with a second connecting portion 321, and the second connecting portion 321 is assembled on the first connecting pipe 41 or between the first connecting pipe 41 and the valve body 10, which is easy to assemble.

[0064] like Figure 1 and Figure 5 As shown, in an optional embodiment, the first connecting pipe 41 passes through the first opening 102 and is inserted into the valve cavity 101. The plug-in connection method can reduce the space occupied by the outside and is simple to operate.

[0065] like Figure 4As shown, in a further embodiment, along the axial direction of the valve cavity 101, the second connecting portion 321 is located between the first connecting portion 41 and the limiting portion 11, and the second connecting portion 321 is welded to at least the first connecting portion 41 or the limiting portion 11. In this arrangement, the end surfaces of the limiting portion 11 and the first connecting portion 41 both limit the second connecting portion 321, facilitating the positioning of the second connecting portion 321. The second connecting portion 321 can be welded to the limiting portion 11 or to the first connecting portion 41, or the limiting portion 11 and the first connecting portion 41 can be welded to the second connecting portion 321 at the same time.

[0066] During assembly, the second filter structure 32 is first welded and fixed, and then the flow regulating component 20 is installed from the assembly end 104. The welding slag of the second filter structure 32 can be cleaned before the flow regulating component 20 is installed to avoid the welding slag from adversely affecting the internal parts of the valve cavity 101 such as the flow regulating component 20.

[0067] In other embodiments, the second connecting portion 321 and the first connecting pipe 41 have an interference fit to prevent the second filter structure 32 from shrinking and falling off the inner wall of the first connecting pipe 41 after encountering the supercooled fluid, thereby ensuring assembly reliability. At this time, the first connecting pipe 41 abuts the limiter 11, which limits the insertion length of the first connecting pipe 41 relative to the valve body 10, facilitating the assembly and positioning of the first connecting pipe 41.

[0068] like Figure 1 and Figure 5 As shown, in an optional embodiment, a connecting section 13 is formed protruding from the side wall of the valve body 10 to facilitate communication with an external pipeline through the connecting section 13. The provision of the connecting section 13 can extend the distance between the connection point with the external pipeline and the valve body 10, reducing the impact of the connection on the internal structure of the valve cavity 101. A fluid channel 131 is constructed within the connecting section 13 and communicates with the valve cavity 101. Fluid is transported into the valve cavity 101 through the fluid channel 131. A second opening 103 is provided at the end of the connecting section 13, which is connected to the fluid channel 131.

[0069] like Figure 1 and Figure 5 As shown, in some embodiments, the stop valve 100 also includes a connector 43 and a second connecting pipe 42. The connector 43 is sleeved on the outside of the connecting section 13. One end of the second connecting pipe 42 is assembled between the connector 43 and the connecting section 13, and the other end is used to be connected to an external pipe fitting. The connector 43 has a tightening effect on the assembly of the second connecting pipe 42.

[0070] like Figure 5As shown, further, the stop valve 100 also includes a third filtering structure 33, which is located in the fluid channel 131 to filter the fluid flowing into the fluid channel 131 from the second port 103, remove impurities in the fluid, and prevent the impurities from affecting the internal structure of the valve cavity 101, thereby preventing fluid leakage.

[0071] like Figure 6 and Figure 7 As shown, specifically, the third filter structure 33 has a third connecting portion 331, and the third connecting portion 331 is interference fit with the connecting section 13 to ensure that the third filter structure 33 is firmly assembled, which helps the third filter structure 33 resist fluid impact and prevents the third filter structure 33 from shrinking and falling off from the fluid channel 131 when encountering supercooled fluid.

[0072] like Figure 6 and Figure 7 As shown, in a specific embodiment, the third filter structure 33 is completely located in the fluid channel 131; that is, the third filter structure 33 does not protrude outward from the second opening 103, which is beneficial to protecting the third filter structure 33. At the same time, it can also avoid interference with the connection between the connecting section 13 and the external pipe.

[0073] like Figure 6 As shown, in some embodiments, the end of the connecting section 13 at the second opening 103 is bent toward the fluid channel 131 to form a second crimping portion 132. The second crimping portion 132 abuts against the third filter structure 33, thereby limiting the third filter structure 33 and preventing the third filter structure 33 from being flushed out of the fluid channel 131 due to excessive fluid pressure. For example, the second crimping portion 132 can be formed by riveting, which is simple to operate.

[0074] like Figure 7 As shown, in other embodiments, the inner wall of the connecting section 13 is recessed inward to form a first retaining groove 133. The stop valve 100 further includes a first retaining member 51 mounted within the first retaining groove 133. Part of the first retaining member 51 extends out of the first retaining groove 133 and is capable of abutting the third filter structure 33. The first retaining member 51 is located between the third filter structure 33 and the second opening 103. In this manner, the second retaining groove 12 cooperates with the first retaining member 51 to stably secure the first retaining member 51 within the fluid passage 131. The first retaining member 51 can limit the third filter structure 33, preventing it from being flushed out of the fluid passage 131 due to excessive fluid pressure.

[0075] Exemplarily, the first clamping groove 133 is configured as an annular groove, and correspondingly, the first limiting member 51 is configured as a clamping ring.

[0076] Since the second filter structure 32 and the third filter structure 33 are similar to the first filter structure 31 , the description of the first filter structure 31 may be referred to for the second filter structure 32 and the third filter structure 33 , and will not be repeated here.

[0077] 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.

[0078] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A stop valve, characterized in that: include: The valve body (10) is provided with an axial valve cavity (101), and a limiting portion (11) is convexly provided on the cavity wall of the valve cavity (101); A flow regulating assembly (20) is disposed in contact with the limiting portion (11); the flow regulating assembly (20) is detachably connected to the cavity wall of the valve cavity (101); and a first crimping portion (213) is configured at one end of the flow regulating assembly (20) away from the limiting portion (11) along the axial direction. The first filter structure (31) is provided with a first connecting portion (311), and the first filter structure (31) is press-fitted to the first crimping portion (213) via the first connecting portion (311).

2. The stop valve according to claim 1, characterized in that The flow regulating assembly (20) comprises a valve seat (21) and a valve core (22); the valve seat (21) is detachably connected to the wall of the valve cavity (101); the valve seat (21) is configured with an accommodating cavity (211); and the valve core (22) is movably installed in the accommodating cavity (211); An opening (212) is provided on a side of the valve seat (21) facing the first filtering structure (31), the opening (212) is communicated with the accommodating cavity (211), and the edge of the opening (212) forms the first crimping portion (213), which presses the first connecting portion (311) against the end face where the edge of the opening (212) is located.

3. The stop valve according to claim 2, characterized in that The first crimping portion (213) comprises a first limiting section (2131) and a second limiting section (2132) connected to the first limiting section (2131), wherein the second limiting section (2132) is arranged at an angle relative to the first limiting section (2131); Along the axial direction of the valve cavity (101), the first limiting section (2131) is formed to protrude outward from the end surface of the valve seat (21) at the opening (212), and along the radial direction of the valve cavity (101), the first limiting section (2131) is limited to the first connecting portion (311); The second limiting section (2132) is formed by extending from the first limiting section (2131) toward the opening (212), and along the axial direction of the valve cavity (101), the second limiting section (2132) presses the first connecting portion (311) against the end face where the edge of the opening (212) is located.

4. The stop valve according to claim 2, characterized in that The first crimping portion (213) is protruded outward from the end surface at the opening (212) to form a curved structure, which extends toward the opening (212) and presses the first connecting portion (311) against the end surface where the edge of the opening (212) is located.

5. The stop valve according to claim 1, characterized in that The valve body (10) has an assembly end (104) and a connection end (105) arranged along the axial direction, and the limiting portion (11) is provided between the assembly end (104) and the connection end (105); The stop valve further comprises a second filter structure (32), which can be assembled into the valve cavity (101) from the connecting end (105); and the flow regulating assembly (20) can extend into the valve cavity (101) from the assembly end (104).

6. The stop valve according to claim 5, characterized in that The stop valve further comprises a first connecting pipe (41), wherein the first connecting pipe (41) is assembled on the connecting end (105); The second filtering structure (32) is configured with a second connecting portion (321), and the second connecting portion (321) is assembled on the first connecting pipe (41) or between the first connecting pipe (41) and the valve body (10).

7. The stop valve according to claim 6, characterized in that The connecting end (105) is formed with a first opening (102) communicating with the valve cavity (101); the first connecting pipe (41) passes through the first opening (102) and is inserted into the valve cavity (101); Along the axial direction of the valve cavity (101), the second connecting portion (321) is located between the first connecting portion (41) and the limiting portion (11), and the second connecting portion (321) is welded to at least the first connecting portion (41) or the limiting portion (11); or, the second connecting portion (321) is interference fit with the first connecting portion (41), and the first connecting portion (41) abuts against the limiting portion (11).

8. The stop valve according to any one of claims 1 to 7, characterized in that: The side wall of the valve body (10) is convexly provided with a connecting section (13), a fluid passage (131) communicating with the valve cavity (101) is constructed in the connecting section (13), a second opening (103) is provided at the end of the connecting section (13), and the second opening (103) is communicated with the fluid passage (131); The stop valve further comprises a third filter structure (33), the third filter structure (33) is located in the fluid channel (131), the third filter structure (33) has a third connecting portion (331), and the third connecting portion (331) is interference-fitted with the connecting section (13).

9. The stop valve according to claim 8, characterized in that The third filtering structure (33) is completely located in the fluid channel (131); The end of the connecting section (13) at the second opening (103) is bent toward the fluid channel (131) to form a second crimping portion (132), and the second crimping portion (132) abuts against the third filtering structure (33).

10. The stop valve according to claim 8, characterized in that The inner wall of the connecting section (13) is recessed inward to form a first clamping groove (133); The stop valve further comprises a first limiting member (51) installed in the first slot (133); a portion of the first limiting member (51) extends out of the first slot (133) and is capable of forming an abutment with the third filter structure (33); the first limiting member (51) is located between the third filter structure (33) and the second opening (103).

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