Stop valve

Abstract

The stop valve comprises a valve body, a valve seat, a valve element, a first connecting pipe, a first filtering structure and a second filtering structure. The valve body is provided with a valve cavity, a first port and a second port; the first port and the second port are arranged at an interval and are respectively communicated with the valve cavity; the valve seat is fixedly installed in the valve cavity and provided with a circulation hole penetrating in the axial direction of the valve cavity. The valve element is movably installed in the valve cavity and abuts against the side, away from the first through opening, of the valve seat. The valve element can rotate around the axis of the valve element to block or open the circulation hole. The first connecting pipe is connected to the first port of the valve body; the first filtering structure is located on the side, close to the first through opening, of the valve seat and is provided with a first connecting part, and the first connecting part is assembled in the valve body and / or the first connecting pipe. The second filtering structure is provided with a second connecting part and is installed on the side, close to the second through opening, of the valve seat through the second connecting part. By means of the arrangement, impurities are prevented from entering the valve cavity to affect normal operation of the valve element, the valve seat and other structures, and fluid leakage is reduced.

Description

Technical Field

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

[0002] In related technologies, globe valves control the flow of fluid by adjusting the valve core relative to the valve seat. Specifically, electric globe valves can control the valve core to close relative to the valve seat when the motor is constant. However, when foreign matter in the fluid adheres to the valve core, the resistance to the valve core's movement increases, preventing the globe valve from fully opening or closing, creating a risk of fluid leakage. Furthermore, if foreign matter adheres to structures associated with the valve core, such as the sealing structure on the valve core, it can affect the sealing effect and cause fluid leakage. Utility Model Content

[0003] Based on this, it is necessary to provide a stop valve to address the above technical problems, so as to reduce the adhesion of foreign matter in the fluid and ensure the performance of the stop valve.

[0004] The stop valve includes a valve body, a valve seat, a valve core, a first connecting pipe, a first filtering structure and a second filtering structure; the valve body is constructed with a valve cavity, a first port and a second port; the first port and the second port are arranged at intervals and are respectively connected to the valve cavity, and the valve cavity has an axial direction; the valve seat is fixedly installed in the valve cavity, and the valve seat is constructed with a flow hole that passes through along the axial direction; the valve core is movably installed in the valve cavity, and the valve core abuts against the side of the valve seat away from the first port; the valve core can rotate around its own axis to block or open the flow hole; the first connecting pipe is connected to the first port of the valve body; the first filtering structure is located on the side of the valve seat close to the first port, and the first filtering structure is constructed with a first connecting portion, which is assembled in the valve body and / or in the first connecting pipe; the second filtering structure is constructed with a second connecting portion, and is installed on the side of the valve seat close to the second port through the second connecting portion; along the fluid flow direction, the valve core and the valve seat are located between the first filtering structure and the second filtering structure.

[0005] It is understandable that the setting of the valve cavity provides assembly space for the valve seat and the valve core. When the valve core rotates to an angle to block the flow hole of the valve seat, the first port is disconnected from the second port, and the fluid cannot pass through the stop valve. The moving iron core rotates to an angle to open the flow hole, and the flow hole can connect the first port with the valve cavity, and then connect the first port with the second port, so that the fluid can pass through the stop valve. The setting of the first connecting pipe is convenient for connection with the external pipeline, and then the fluid is delivered to the first port. The first filter structure is set to filter the fluid at the first port, and the second filter structure is set to filter the fluid at the second port, so as to prevent impurities from entering the valve cavity from the first port and the second port to affect the normal operation of the valve core, valve seat and other structures, and reduce fluid leakage.

[0006] In an optional embodiment, the cavity wall of the valve cavity near the first opening protrudes inward to form a limiting portion, the valve seat is installed and abuts against the side of the limiting portion facing the valve cavity, and the outer diameter of the valve seat is larger than the inner diameter of the limiting portion; 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 first connecting portion is located between the limiting portion and the end face of the first connecting pipe, and the first connecting portion is welded to at least the limiting portion or the first connecting pipe.

[0007] It can be understood that the valve cavity is provided with a limiting portion to assemble and position the valve seat and provide support for the cooperation between the valve seat and the valve core. The limiting portion and the end face of the first connecting pipe respectively serve as assembly limits for the first connecting portion. The first filter structure is fixed by welding connection, which is firm, reliable and has good sealing performance.

[0008] In an optional embodiment, the first connecting portion is bent to form a first clamping cavity and a first opening connected to the first clamping cavity, and the first opening is radially toward the cavity wall of the valve cavity along the valve cavity; the first filtering structure also includes a first filter screen, and the edge of the first filter screen is provided with a first bending section, the first bending section extends into the first clamping cavity, and the cavity wall of the first clamping cavity clamps the first bending section; along the thickness direction of the first bending section, at least one side surface of the first connecting portion is used to connect the limiting portion or the first connecting pipe.

[0009] It is understandable that such a configuration does not require a hole to be opened to form the first clamping cavity. It is only necessary to adjust the bending degree of the first connecting portion according to the thickness of the first bending section, which is flexible in operation.

[0010] In an optional embodiment, the cavity wall of the valve cavity near the first opening protrudes inward to form a limiting portion, the valve seat is installed and abuts against the side of the limiting portion facing the valve cavity, and the outer diameter of the valve seat is larger than the inner diameter of the limiting portion; the stop valve also includes a first sealing member; the end surface of the limiting member facing the valve core is recessed inward along the axial direction to form a first sealing groove, the first sealing groove accommodates the first sealing member, and the first sealing member is pressed between the valve seat and the bottom of the first sealing groove along the axial direction of the valve cavity; the first sealing member is constructed with a fitting portion, the fitting portion is protruded from the first sealing groove, and the fitting portion is pressed between the valve seat and the limiting portion; the fitting portion is connected to the first connecting portion.

[0011] It is understandable that the valve cavity is provided with a limiting portion to assemble and position the valve seat and provide support for the cooperation between the valve seat and the valve core. The first sealing groove and the first sealing member cooperate to block the gap between the valve seat and the limiting portion to prevent fluid leakage. The first sealing member is provided with a matching portion to ensure the sealing effect while being able to connect with the first connecting portion to fix the first filter structure. With this arrangement, the first sealing member and the first filter structure can be connected as a whole during assembly, and then the two can be assembled together into the valve cavity to avoid the connection of the first filter structure affecting the interior of the valve cavity.

[0012] In an optional embodiment, the first connecting portion is bent to form a first clamping cavity and a first opening connected to the first clamping cavity, and the first opening is radially toward the cavity wall of the valve cavity along the valve cavity; the first filtering structure also includes a first filter screen, and the edge of the first filter screen is provided with a first bending section, the first bending section extends into the first clamping cavity, and the cavity wall of the first clamping cavity clamps the first bending section; the first connecting portion and the first bending section are respectively injection molded as one piece with the mating portion.

[0013] As can be appreciated, this arrangement eliminates the need for drilling to form the first clamping cavity; instead, the first connecting portion can be bent to adjust the thickness of the first bent section, simplifying operation. The injection molding process allows the first seal to form an integral structure with the first filter structure, eliminating the need for drilling, welding, or assembly, making operation simple.

[0014] In an optional embodiment, the cavity wall of the valve cavity near the first opening protrudes inward to form a limiting portion, the valve seat is installed and abuts against the side of the limiting portion facing the valve cavity, and the outer diameter of the valve seat is larger than the inner diameter of the limiting portion; the inner wall of the first connecting pipe is interference fit with the first connecting portion, and the first connecting pipe is inserted into the valve cavity and abuts against the limiting portion.

[0015] It is understood that the valve cavity is provided with a stopper to position the valve seat for assembly and provide support for the fit between the valve seat and the valve core. Furthermore, this arrangement allows the first filter structure to be stably mounted on the first connecting pipe, thereby resisting the impact of the fluid and preventing the first filter structure from shrinking and falling off due to excessively cold fluid temperature.

[0016] In an optional embodiment, the first connecting portion is bent to form a first clamping cavity and a first opening connected to the first clamping cavity, the first opening is arranged axially away from the valve core along the valve cavity, the first filtering structure also includes a first filter screen, the first filter screen extends into the first clamping cavity from the first opening, and the outer peripheral wall of the first connecting portion is interference fit with the inner wall of the first connecting pipe.

[0017] It is understandable that this arrangement does not require opening a hole to form the first clamping cavity. It is only necessary to adjust the bending degree of the first connecting portion according to the thickness of the first filter screen, which is easy to operate.

[0018] In an optional embodiment, the side wall of the valve body forms a connecting section facing away from the valve body, a fluid channel connected to the valve cavity is constructed in the connecting section, and the end of the connecting section forms the second port; the second filtering structure is installed on the connecting section through the second connecting portion and is at least partially located in the fluid channel.

[0019] It is understood that the connection section is provided to facilitate connection of the valve body to an external pipeline, allowing fluid to enter the valve cavity through the fluid passage of the connection section. A second filter structure is provided within the fluid passage to filter the fluid entering the valve cavity through the second opening, preventing impurities and foreign matter from entering the valve cavity, protecting the internal structure of the valve cavity, and preventing fluid leakage.

[0020] In an optional embodiment, the second filtering structure is completely located within the fluid channel, and the second connecting portion is interference fit with the inner wall of the connecting section; the second filtering structure also includes a second filter screen connected to the second connecting portion, and along the axial direction of the fluid channel, the second connecting portion is located between the second filter screen and the second port.

[0021] As can be understood, this arrangement prevents the second filter structure from protruding outward from the second opening, thus preventing interference with the connection between the connecting section and the external pipeline. Furthermore, the interference fit allows the second filter structure to be securely assembled within the fluid passage, preventing the second filter from shrinking and falling out due to supercooled fluid. The second connecting portion is closer to the second opening than the second filter, facilitating assembly and simplifying operation.

[0022] In an optional embodiment, along the axial direction of the fluid channel, the length of the second filter structure is smaller than the length of the fluid channel.

[0023] It is understandable that this arrangement is to prevent the second filter structure from being too long and extending into the valve cavity, which is beneficial to protecting the structure in the valve cavity and avoiding interference.

[0024] In an optional embodiment, the side wall of the valve body is provided with a connecting section protruding outward, a fluid channel connected to the valve cavity is constructed in the connecting section, and the end of the connecting section forms the second port; the stop valve also includes a second filtering structure and a second connecting pipe, the second filtering structure is constructed with a second connecting portion, the second connecting portion is connected to at least the second connecting pipe, and the second connecting pipe passes through the second port and is inserted into the fluid channel.

[0025] It can be understood that the second connecting pipe is used to better connect the connecting section to the external pipeline, and the second connecting pipe can also assist in the assembly of the second filtering structure.

[0026] In an optional embodiment, the end face of the connecting section where the second opening is located is recessed axially inward along the fluid channel to form a limiting groove; the second connecting portion is located between the bottom of the limiting groove and the end face of the second connecting pipe facing the fluid channel, and the second connecting portion is welded to at least the bottom of the limiting groove or the second connecting pipe; or, the second connecting portion is interference fit with the inner wall of the second connecting pipe, and at least the second connecting pipe abuts the bottom of the limiting groove, and along the radial direction of the fluid channel, the second connecting pipe is located between the connecting section and the second filtering structure.

[0027] It is understood that the connection section is provided with a limiting groove to limit the assembly of the second filter structure. The bottom of the limiting groove and the end surface of the second pipe can both limit the second filter structure, making the assembly more stable. The welding connection method can form a strong and reliable connection. Of course, the second pipe and the second connecting portion can also be interference fit. In this way, the second pipe and the second filter structure only need to be assembled into one piece and then installed together into the fluid channel. This is simple to operate. In this case, the bottom of the limiting groove limits the assembly of the second pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 A three-dimensional cross-sectional view of the stop valve provided for this application;

[0030] Figure 2This is a schematic diagram of the structure inside the valve body of the stop valve provided in this application;

[0031] Figure 3 A cross-sectional view of an embodiment of a stop valve provided in this application;

[0032] Figure 4 for Figure 3 A is a partial enlarged view of the first embodiment;

[0033] Figure 5 for Figure 3 A partial enlarged view of the second embodiment;

[0034] Figure 6 for Figure 3 A partial enlarged view of the third embodiment;

[0035] Figure 7 for Figure 3 A partial enlarged view of point B in the middle;

[0036] Figure 8 A cross-sectional view of another embodiment of the stop valve provided in this application;

[0037] Figure 9 for Figure 8 A partial enlarged view of an embodiment at C in the middle;

[0038] Figure 10 for Figure 8 A partially enlarged view of another embodiment at point C.

[0039] Explanation of reference numerals: 100, stop valve; 10, valve body; 101, valve chamber; 102, first opening; 103, second opening; 104, assembly port; 11, limiting portion; 111, first sealing groove; 12, connecting section; 121, fluid channel; 122, limiting groove; 20, valve seat; 201, flow hole; 30, valve core; 31, blocking portion; 41, first connecting pipe; 42, second connecting pipe; 43, connector; 51, first filtering structure; 511, first connecting portion; 5111, first clamping chamber; 5112, first opening; 5113, first Folding section; 5114, second folding section; 512, first filter screen; 5121, first bending section; 52, second filter structure; 521, second connecting portion; 5211, second clamping cavity; 5212, second opening; 5213, third folding section; 5214, fourth folding section; 522, second filter screen; 5221, second bending section; 61, first sealing member; 611, fitting portion; 62, second sealing member; 63, third sealing member; 71, valve stem; 711, stop boss; 72, bearing; 73, fastening joint; 80, limiting ring; 81, limiting protrusion. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] See also Figures 1 to 10 The present application provides a stop valve 100, which includes a valve body 10, a valve seat 20, and a valve core 30. The valve body 10 is constructed with a valve cavity 101, a first port 102, and a second port 103. The first port 102 and the second port 103 are arranged at intervals and are respectively connected to the valve cavity 101. In this way, fluid can enter the valve cavity 101 from the first port 102 and the second port 103. The valve cavity 101 provides an assembly space for the valve seat 20 and the valve core 30, facilitating the matching of the valve seat 20 and the valve core 30.

[0048] Furthermore, the cavity wall of the valve cavity 101 near the first opening 102 bulges inward to form a limiting portion 11, and the valve cavity 101 has an axial direction; the valve seat 20 is installed and abuts against the side of the limiting portion 11 facing the valve cavity 101, and the outer diameter of the valve seat 20 is larger than the inner diameter of the limiting portion 11. The limiting portion 11 can form an abutting end face, which limits the valve seat 20 when the valve seat 20 is assembled, thereby quickly determining the assembly position of the valve seat 20, and can also provide support for the valve seat 20.

[0049] The valve seat 20 is constructed with a flow hole 201 extending axially therethrough; the valve core 30 is movably mounted within the valve cavity 101, and the valve core 30 abuts against the side of the valve seat 20 facing away from the first port 102; the valve core 30 can rotate about its own axis to block or open the flow hole 201, thereby switching the flow of fluid, and is easy to operate. When the valve core 30 rotates in the forward direction about its own axis, the valve core 30 gradually blocks the flow hole 201 of the valve seat 20, and the fluid flow rate gradually decreases until the flow hole 201 is completely blocked. At this time, the first port 102 and the second port 103 cannot communicate, and the fluid cannot pass through, thus achieving the cutoff of the fluid flow. Furthermore, when the valve core 30 rotates in the reverse direction about its own axis, the valve core 30 gradually cancels the blockage of the flow hole 201, and the fluid flow rate gradually increases until the flow hole 201 is fully opened. At this time, the first port 102, the valve cavity 101, the flow hole 201, and the second port 103 can be fully connected, and the fluid can flow smoothly.

[0050] Among them, two or more flow holes 201 can be provided, and at least two flow holes 201 are arranged at intervals along the circumference of the valve seat 20; correspondingly, Figure 1 and Figure 2 As shown, the valve core 30 is constructed with at least two blocking portions 31, which are spaced apart circumferentially along the valve cavity 101. During operation, the valve core 30 rotates in the forward direction about its axis, causing each blocking portion 31 to gradually block the flow hole 201 until it is completely blocked. The valve core 30 rotates in the reverse direction about its axis, causing each blocking portion 31 to gradually release its blockage of the flow hole 201, gradually opening the flow hole 201 to a fully open state.

[0051] like Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, in a specific embodiment, the valve body 10 further comprises an assembly port 104, which is arranged axially opposite the first opening 102 along the valve cavity 101. The stop valve 100 further comprises a valve stem 71, which passes through the assembly port 104 and is connected to the valve core 30. Rotation of the valve stem 71 enables rotation of the valve core 30. Furthermore, the valve stem 71 is connected to a power source, which provides a source of power for the rotation of the valve stem 71. For example, the power source can be a motor, which can rotate the valve core 30 with a relatively low torque.

[0052] like Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, more specifically, a limit ring 80 is assembled in the valve cavity 101, and the limit ring 80 is sleeved on the outside of the valve stem 71. The limit ring 80 is constructed with at least two limit protrusions 81, and the limit protrusions 81 are formed by radially protruding inward along the limit ring 80. At least two limit protrusions 81 are arranged at intervals along the circumference of the limit ring 80. The valve stem 71 rotates between two adjacent limit protrusions 81. The limit protrusions 81 can limit the valve stem 71 from continuing to rotate, thereby limiting the rotation angle of the valve stem 71.

[0053] like Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, the stop valve 100 further includes a bearing 72, which is installed in the valve cavity 101 and sleeved on the valve stem 71 to support the rotation of the valve stem 71 and reduce rotational friction. The valve stem 71 is provided with a stop boss 711. Along the axial direction of the valve cavity 101, the stop boss 711 is located on the side of the bearing 72 away from the assembly opening 104 to limit axial movement of the valve stem 71 and prevent the valve stem 71 from dislodging from the assembly opening 104.

[0054] like Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, further, the stop valve 100 also includes a fastening joint 73 assembled in the valve cavity 101. The fastening joint 73 is sleeved on the valve stem 71 and abuts against the side of the bearing 72 close to the assembly port 104 to limit the axial movement of the bearing 72 along the valve cavity 101.

[0055] like Figure 3 and Figure 8 As shown, in an optional embodiment, the stop valve 100 further includes a first sealing member 61; the end surface of the limiting portion 11 facing the valve core 30 is axially recessed inward to form a first sealing groove 111. The first sealing groove 111 accommodates the first sealing member 61. Along the axial direction of the valve cavity 101, the first sealing member 61 is pressed tightly between the valve seat 20 and the bottom of the first sealing groove 111. In this way, the provision of the first sealing groove 111 facilitates the stable limiting assembly of the first sealing member 61 and provides space for the first sealing member 61 to be squeezed and deformed. The first sealing member 61 can seal between the valve seat 20 and the limiting portion 11, preventing fluid from entering the valve cavity 101 through the gap between the valve seat 20 and the limiting portion 11.

[0056] like Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, in a further embodiment, the stop valve 100 also includes a second sealing member 62, which is sleeved on the outside of the fastening joint 73 and squeezed between the fastening joint 73 and the wall of the valve cavity 101 to achieve sealing between the fastening joint 73 and the wall of the valve cavity 101, thereby preventing fluid from leaking from between the fastening joint 73 and the wall of the valve cavity 101.

[0057] like Figure 1 、 Figure 3 and Figure 8 As shown, in a further embodiment, the stop valve 100 also includes a third sealing member 63, which is sleeved on the outside of the valve stem 71 and squeezed between the valve stem 71 and the fastening joint 73 to achieve sealing between the fastening joint 73 and the valve stem 71, thereby preventing fluid from leaking from between the fastening joint 73 and the valve stem 71.

[0058] like Figure 1 、 Figure 2 、 Figure 3 and Figure 8As shown, further, the stop valve 100 also includes a first connecting pipe 41 and a first filtering structure 51. Among them, the first connecting pipe 41 is connected to the first port 102 of the valve body 10, so as to facilitate the connection of the valve body 10 with the external pipeline. The external pipeline transports the fluid into the first connecting pipe 41, and the fluid is transported into the first port 102 by the first connecting pipe 41. Furthermore, the first filtering structure 51 is located on the side of the valve seat 20 close to the first port 102 to filter impurities in the fluid and prevent impurities from entering the valve cavity 101 from the first port 102, thereby preventing impurities from affecting the coordination of the valve core 30, the valve seat 20 and other internal structures and causing fluid leakage. For example, if impurities adhere to the valve core 30 and the motor torque remains unchanged, the resistance to the rotation of the valve core 30 will increase, resulting in the inability to completely block the flow hole 201, causing sealing failure. Therefore, the first filtering structure 51 is provided to avoid such situations. Specifically, the first filter structure 51 is configured with a first connecting portion 511 . The first connecting portion 511 is assembled in the valve body 10 and / or the first connecting pipe 41 . The first filter structure 51 is assembled through the first connecting portion 511 .

[0059] Furthermore, the stop valve 100 also includes a second filtering structure 52, which is constructed with a second connecting portion 521 and is installed on the side of the valve seat 20 close to the second port 103 through the second connecting portion 521 to remove impurities in the fluid and prevent impurities in the fluid entering the valve cavity 101 from the second port 103 from affecting the internal structure of the valve cavity 101, thereby preventing fluid leakage.

[0060] In summary, along the fluid flow direction, the valve core 30 and the valve seat 20 are located between the first filter structure 51 and the second filter structure 52. By providing the first filter structure 51 and the second filter structure 52, foreign matter can be prevented from entering the valve cavity 101, thereby protecting the normal operation of various components such as the valve seat 20 and the valve core 30 in the valve cavity 101 and preventing fluid leakage.

[0061] like Figures 4 to 6As shown, in a specific embodiment, the first filter structure 51 includes a first filter 512, which is connected to the first connecting portion 511, and the first filter 512 plays a filtering role. Furthermore, the first connecting portion 511 is bent to form a first clamping cavity 5111 and a first opening 5112 connected to the first clamping cavity 5111. The bending process does not require hole processing, making the first connecting portion 511 more structurally complete. The first filter structure also includes a first filter 512, the edge of the first filter 512 extends from the first opening 5112 into the first clamping cavity 5111, and the cavity wall of the first clamping cavity 5111 clamps the edge of the first filter 512. During assembly, the edge of the first filter screen 512 is first inserted into the first clamping cavity 5111, and the cavity walls of the first clamping cavity 5111 are brought close to each other through external force to clamp the first filter screen 512, thereby fixing the first filter screen 512. The distance between the cavity walls of the first clamping cavity 5111 can be flexibly adjusted according to the thickness of the first filter screen 512.

[0062] In further embodiments, the first filter screen 512 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 512 is configured to protrude axially from the valve cavity 101, away from the valve seat 20, to avoid interference with the valve seat 20 and to increase the filtration area of the first filter screen 512, thereby enhancing the filtration effect. More specifically, the mesh surface of the first filter screen 512 can be configured as a smooth curved surface to reduce blind spots and promote smooth fluid flow.

[0063] like Figure 1 、 Figure 3 and Figure 8 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, which has a simple structure, convenient assembly, reduces external space occupation, and is compact to assemble.

[0064] like Figure 4 As shown, in the first embodiment, along the axial direction of the valve cavity 101, the first connecting portion 511 is located between the limiting portion 11 and the end surface of the first connecting pipe 41. The first connecting portion 511 is welded to at least the limiting portion 11 or the first connecting pipe 41. In this arrangement, the end surfaces of the limiting portion 11 and the first connecting pipe 41 both limit the first connecting portion 511, facilitating the positioning of the first connecting portion 511. The first connecting portion 511 can be welded to the limiting portion 11 or to the first connecting pipe 41, or both the limiting portion 11 and the first connecting pipe 41 can be welded to the first connecting portion 511.

[0065] During assembly, the first filter structure 51 is first welded and fixed, and then the valve seat 20 is installed from the assembly port 104. The welding slag of the first filter structure 51 can be cleaned before the valve seat 20 is installed to avoid the welding slag from adversely affecting the valve seat 20 and other internal parts of the valve cavity 101.

[0066] At this time, a first bending section 5121 is provided on the edge of the first filter screen 512 to adapt to the connection between the first connecting portion 511 located between the limiting portion 11 and the end face of the first connecting pipe 41. The first opening 5112 is radially toward the cavity wall of the valve cavity 101 along the valve cavity 101, and the first bending section 5121 extends from the first opening 5112 into the first clamping cavity 5111. The cavity wall of the first clamping cavity 5111 clamps the first bending section 5121. Along the thickness direction of the first bending section 5121, at least one side surface of the first connecting portion 511 is used to connect to the limiting portion 11 or the first connecting pipe 41.

[0067] like Figure 5 As shown, in the second embodiment, the first sealing member 61 is constructed with a fitting portion 611, which is protruding from the first sealing groove 111 and pressed between the valve seat 20 and the limiting portion 11; the fitting portion 611 is connected to the first connecting portion 511. That is, after the first filter structure 51 and the first sealing member 61 are connected to form a whole and then installed into the valve cavity 101, the assembly of the first filter structure 51 will not affect the structure inside the valve cavity 101. The first sealing member 61 not only realizes the sealing function but also plays the role of assembling the first filter structure 51. In this embodiment, the arrangement of the first connecting portion 511 is similar to the structure in the first embodiment, and reference may be made to the first embodiment, which will not be repeated here.

[0068] In a specific embodiment, the first seal 61 and the first filter structure 51 are injection molded as one piece, and the assembly is simple, that is, the first connecting portion 511 and the first bending section 5121 are respectively injection molded as one piece with the matching portion 611, and there is no need to punch holes in the first seal 61 to ensure the sealing performance of the first seal 61.

[0069] like Figure 6 As shown, in the third embodiment, the inner wall of the first connecting pipe 41 and the first connecting portion 511 have an interference fit, allowing the first filtering structure 51 to be tightly mounted on the first connecting pipe 41. This prevents the first filtering structure 51 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 point, the first connecting pipe 41 abuts the stopper 11, which limits the insertion length of the first connecting pipe 41 relative to the valve body 10, facilitating assembly and positioning of the first connecting pipe 41.

[0070] In the third embodiment, the structure of the first connecting portion 511 and the first filter screen 512 is similar to that in the first embodiment, and reference may be made to the structure in the first embodiment, with the difference being that the first opening 5112 is arranged axially away from the valve core 30 along the valve cavity 101, and the first filter screen 512 does not need to be provided with a first bending section 5121 to be assembled with the first clamping cavity 5111. The first filter screen 512 extends directly from the first opening 5112 into the first clamping cavity 5111, and the outer peripheral wall of the first connecting portion 511 is interference fit with the inner wall of the first connecting pipe 41.

[0071] In a specific embodiment, the first connecting portion 511 is bent to form a first folded segment 5113 and a second folded segment 5114 connected to the first folded segment 5113. The first folded segment 5113 is interference fit with the first connecting pipe 41. The length of the first folded segment 5113 is greater than that of the second folded segment 5114. The portion of the first folded segment 5113 located at the first opening 5112 that is longer than the second folded segment 5114 is pressed radially inward along the valve cavity 101 onto the first filter screen 512 to enhance the limiting assembly of the first filter screen 512.

[0072] like Figure 1 、 Figure 3 and Figure 8 As shown, in an optional embodiment, a connecting section 12 is formed on the sidewall of the valve body 10, facing away from the valve body 10, to facilitate communication with an external pipeline through the connecting section 12. The provision of the connecting section 12 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 121 is constructed within the connecting section 12, communicating with the valve cavity 101. Fluid is transported into the valve cavity 101 through the fluid channel 121. The end of the connecting section 12 forms a second opening 103. The second filter structure 52 is mounted to the connecting section 12 via a second connecting portion 521 and is at least partially located in the fluid channel 121.

[0073] In a specific embodiment, the second filter structure 52 includes a second filter screen 522, which is connected to the second connecting portion 521 and performs a filtering function. Furthermore, the second connecting portion 521 is bent to form a second clamping cavity 5211 and a second opening 5212 connected to the second clamping cavity 5211. This bending process eliminates the need for hole drilling, thus enhancing the structural integrity of the second connecting portion 521. The second filter structure 52 also includes a second filter screen 522, the edge of which extends from the second opening 5212 into the first clamping cavity 5111. The walls of the first clamping cavity 5111 clamp the edge of the second filter screen 522. During assembly, first insert the edge of the second filter screen 522 into the second clamping cavity 5211, and use external force to bring the cavity walls of the second clamping cavity 5211 closer to each other to clamp the second filter screen 522, thereby fixing the second filter screen 522. The distance between the cavity walls of the first clamping cavity 5111 can be flexibly adjusted according to the thickness of the second filter screen 522.

[0074] In further embodiments, the second filter screen 522 is configured as a flat mesh extending radially along the fluid channel 121, resulting in a simple structure and ease of fabrication. In other embodiments, the second filter screen 522 is configured as a raised mesh extending axially along the fluid channel 121. This configuration increases the filtering area of the second filter screen 522 and enhances the filtering effect. More specifically, the mesh surface of the second filter screen 522 can be configured as a smooth curved surface, which helps reduce dead angles and promotes smooth fluid flow.

[0075] like Figure 7 As shown, in a further embodiment, the second filter structure 52 is completely located within the fluid channel 121. In other words, the second filter structure 52 does not protrude outward from the second opening 103, which helps protect the second filter structure 52 and also avoids interference with the external connection of the connecting section 12. In this case, the second connecting portion 521 has an interference fit with the inner wall of the connecting section 12 to ensure that the second filter structure 52 is firmly assembled, helping the second filter structure 52 resist fluid impact and preventing the second filter structure 52 from shrinking and falling out of the fluid channel 121 when encountering supercooled fluid.

[0076] It should be noted that when the second filter structure 52 is completely located in the fluid channel 121, the length of the second filter structure 52 along the axial direction of the fluid channel 121 is less than the length of the fluid channel 121, so as to avoid the second filter structure 52 being too long and affecting the normal operation of the internal parts of the valve cavity 101.

[0077] In a more specific embodiment, along the axial direction of the fluid channel 121, the second connecting portion 521 is located between the second filter screen 522 and the second opening 103, that is, the second connecting portion 521 is closer to the second opening 103. During assembly, the assembly status of the second connecting portion 521 and the connecting section 12 can be directly observed from the second opening 103, which makes the operation easier.

[0078] like Figure 3 and Figure 7 As shown, in some embodiments, the end of the connecting section 12 is connected to a connector 43 to facilitate connection with an external pipe. Figures 8 to 10 As shown, in other embodiments, the end of the connecting section 12 may be connected to a second connecting pipe 42 .

[0079] like Figures 8 to 10 As shown, in an optional embodiment, the end of the connecting section 12 is connected to a second connecting pipe 42, which passes through the second opening 103 and is inserted into the fluid channel 121; the second connecting portion 521 is connected to at least the second connecting pipe 42, and the second filtering structure 52 can be assembled according to the position of the second connecting pipe 42 or assembled into the fluid channel 121 following the second connecting pipe 42.

[0080] like Figure 9 As shown, in a specific embodiment, the end surface of the connecting section 12 where the second opening 103 is located is recessed inwardly along the axial direction of the fluid channel 121 to form a limiting groove 122; the second connecting portion 521 is located between the bottom of the limiting groove 122 and the end surface of the second connecting pipe 42 facing the fluid channel 121, and the second connecting portion 521 is welded to at least the limiting groove 122 or the second connecting pipe 42. In this way, the bottom of the limiting groove 122 and the end surface of the second connecting pipe 42 both have a limiting effect on the second connecting portion 521, which is beneficial for the positioning of the second connecting portion 521. The second connecting portion 521 can be welded to the bottom of the limiting groove 122 or to the second connecting pipe 42. Alternatively, the second connecting portion 521 can be welded to the bottom of the limiting groove 122 on one side along the axial direction of the fluid channel 121 and welded to the second connecting pipe 42 on the other side.

[0081] At this time, a second bending section 5221 is provided on the edge of the second filter screen 522 to adapt to the connection between the second connecting portion 521 at the bottom of the limiting groove 122 and the end face of the second connecting pipe 42. The second opening 5212 is radially toward the inner wall of the connecting section 12 along the connecting section 12, and the second bending section 5221 extends from the second opening 5212 into the second clamping cavity 5211. The cavity wall of the second clamping cavity 5211 clamps the second bending section 5221. Along the thickness direction of the second bending section 5221, at least one side surface of the second connecting portion 521 is used to connect to the bottom of the limiting groove 122 or the second connecting pipe 42.

[0082] like Figure 10 As shown, in other embodiments, at least the second connecting pipe 42 may abut against the bottom of the limiting groove 122, and the bottom of the limiting groove 122 may at least have a positioning function for the assembly of the second connecting pipe 42. In this case, the inner wall of the second connecting pipe 42 and the second connecting portion 521 have an interference fit to ensure that the second filter structure 52 is firmly assembled, which helps to resist fluid impact and prevent the second filter structure 52 from shrinking when encountering supercooled fluid and falling off the second connecting pipe 42.

[0083] In this case, the second opening 5212 is positioned axially away from the valve chamber 101 along the fluid passage 121. The second filter screen 522 is assembled with the second clamping chamber 5211 without the second bent section 5221. Instead, the second filter screen 522 extends directly from the second opening 5212 into the second clamping chamber 5211. The outer peripheral wall of the second connecting portion 521 forms an interference fit with the inner wall of the second connecting pipe 42. Along the radial direction of the fluid passage 121, the second connecting pipe 42 is located between the connecting section 12 and the second filter structure 52.

[0084] In a specific embodiment, in a specific embodiment, the second connecting portion 521 is bent to form a third fold segment 5213 and a fourth fold segment 5214 connected to the third fold segment 5213, the third fold segment 5213 is interference fit with the second connecting pipe 42, the length of the third fold segment 5213 is greater than the fourth fold segment 5214, and the portion of the third fold segment 5213 located at the second opening 5212 that is longer than the fourth fold segment 5214 is pressed radially inward along the fluid channel 121 on the second filter screen 522 to enhance the limiting assembly of the second filter screen 522.

[0085] 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.

[0086] 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 constructed with a valve cavity (101), a first opening (102) and a second opening (103); the first opening (102) and the second opening (103) are arranged at intervals and are respectively connected to the valve cavity (101); the valve cavity (101) has an axial direction; A valve seat (20) is fixedly installed in the valve cavity (101), and the valve seat (20) is configured with a flow hole (201) extending through the valve cavity along the axial direction; a valve core (30) movably mounted in the valve cavity (101), the valve core (30) abutting against a side of the valve seat (20) facing away from the first opening (102); the valve core (30) can rotate around its own axis to block or open the flow hole (201); A first connecting pipe (41) is connected to the first opening (102) of the valve body (10); a first filtering structure (51) located on a side of the valve seat (20) close to the first opening (102), the first filtering structure (51) being configured with a first connecting portion (511), the first connecting portion (511) being assembled in the valve body (10) and / or in the first connecting pipe (41); a second filtering structure (52), having a second connecting portion (521) and being mounted on a side of the valve seat (20) close to the second opening (103) through the second connecting portion (521); Along the fluid flow direction, the valve core (30) and the valve seat (20) are located between the first filter structure (51) and the second filter structure (52).

2. The stop valve according to claim 1, characterized in that The cavity wall of the valve cavity (101) close to the first opening (102) is convex inward to form a limiting portion (11), the valve seat (20) is installed and abuts against the side of the limiting portion (11) facing the valve cavity (101), and the outer diameter of the valve seat (20) is larger than the inner diameter of the limiting portion (11); 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 first connecting portion (511) is located between the limiting portion (11) and the end face of the first connecting pipe (41), and the first connecting portion (511) is welded to at least the limiting portion (11) or the first connecting pipe (41).

3. The stop valve according to claim 2, characterized in that The first connecting portion (511) is bent to form a first clamping cavity (5111) and a first opening (5112) connected to the first clamping cavity (5111), and the first opening (5112) is radially directed toward the cavity wall of the valve cavity (101) along the valve cavity (101); the first filtering structure (51) further comprises a first filter screen (512), and the edge of the first filter screen (512) is provided with a first bending section (5121), the first bending section (5121) extends from the first opening (5112) into the first clamping cavity (5111), and the cavity wall of the first clamping cavity (5111) clamps the first bending section (5121); Along the thickness direction of the first bending section (5121), at least one side surface of the first connecting portion (511) is used to connect to the limiting portion (11) or the first connecting pipe (41).

4. The stop valve according to claim 1, characterized in that The cavity wall of the valve cavity (101) close to the first opening (102) is convex inward to form a limiting portion (11), the valve seat (20) is installed and abuts against the side of the limiting portion (11) facing the valve cavity (101), and the outer diameter of the valve seat (20) is larger than the inner diameter of the limiting portion (11); The stop valve further comprises a first sealing member (61); the end surface of the limiting portion (11) facing the valve core (30) is recessed inwardly along the axial direction to form a first sealing groove (111); the first sealing groove (111) accommodates the first sealing member (61); along the axial direction of the valve cavity (101), the first sealing member (61) is pressed between the valve seat (20) and the bottom of the first sealing groove (111); The first sealing member (61) is constructed with a fitting portion (611), the fitting portion (611) is protruding from the first sealing groove (111), the fitting portion (611) is pressed between the valve seat (20) and the limiting portion (11); the fitting portion (611) is connected to the first connecting portion (511).

5. The stop valve according to claim 4, characterized in that The first connecting portion (511) is bent to form a first clamping cavity (5111) and a first opening (5112) connected to the first clamping cavity (5111), and the first opening (5112) is radially directed toward the cavity wall of the valve cavity (101) along the valve cavity (101); The first filtering structure (51) further comprises a first filter screen (512), the edge of the first filter screen (512) being provided with a first bent section (5121), the first bent section (5121) extending from the first opening (5112) into the first clamping cavity (5111), and the cavity wall of the first clamping cavity (5111) clamping the first bent section (5121); The first connecting portion (511) and the first bending section (5121) are respectively injection-molded into one piece with the matching portion (611).

6. The stop valve according to claim 1, characterized in that The cavity wall of the valve cavity (101) close to the first opening (102) is convex inward to form a limiting portion (11), the valve seat (20) is installed and abuts against the side of the limiting portion (11) facing the valve cavity (101), and the outer diameter of the valve seat (20) is larger than the inner diameter of the limiting portion (11); The inner wall of the first connecting pipe (41) is interference-fitted with the first connecting portion (511), and the first connecting pipe (41) is inserted into the valve cavity (101) and abuts against the limiting portion (11).

7. The stop valve according to claim 6, characterized in that The first connecting portion (511) is bent to form a first clamping cavity (5111) and a first opening (5112) connected to the first clamping cavity (5111), and the first opening (5112) is arranged axially away from the valve core (30) along the valve cavity (101). The first filtering structure (51) also includes a first filter screen (512), and the first filter screen (512) extends from the first opening (5112) into the first clamping cavity (5111). The outer peripheral wall of the first connecting portion (511) is interference fit with the inner wall of the first connecting pipe (41).

8. The stop valve according to claim 2, 4 or 6, characterized in that: The side wall of the valve body (10) forms a connecting section (12) facing away from the valve body (10), and a fluid channel (121) communicating with the valve cavity (101) is constructed in the connecting section (12), and the end of the connecting section (12) forms the second opening (103); the second filtering structure (52) is installed on the connecting section (12) through the second connecting portion (521) and is at least partially located in the fluid channel (121).

9. The stop valve according to claim 8, characterized in that The second filtering structure (52) is completely located in the fluid channel (121), and the second connecting portion (521) is interference-fitted with the inner wall of the connecting section (12); The second filtering structure (52) further comprises a second filter screen (522) connected to the second connecting portion (521), and along the axial direction of the fluid channel (121), the second connecting portion (521) is located between the second filter screen (522) and the second opening (103).

10. The stop valve according to claim 9, characterized in that Along the axial direction of the fluid channel (121), the length of the second filtering structure (52) is smaller than the length of the fluid channel (121).

11. The stop valve according to claim 8, characterized in that The side wall of the valve body (10) is provided with a connecting section (12) protruding outwards, a fluid channel (121) communicating with the valve cavity (101) is constructed in the connecting section (12), and the end of the connecting section (12) forms the second opening (103); The stop valve further comprises a second filtering structure (52) and a second connecting pipe (42), wherein the second filtering structure (52) is configured with a second connecting portion (521), wherein the second connecting portion (521) is connected to at least the second connecting pipe (42), and the second connecting pipe (42) passes through the second opening (103) and is inserted into the fluid channel (121).

12. The stop valve according to claim 11, characterized in that The end surface of the connecting section (12) where the second opening (103) is located is axially inwardly recessed along the fluid channel (121) to form a limiting groove (122); The second connecting portion (521) is located between the bottom of the limiting groove (122) and the end face of the second connecting pipe (42) facing the fluid channel (121), and the second connecting portion (521) is at least welded to the bottom of the limiting groove (122) or the second connecting pipe (42); or, the second connecting portion (521) is interference fit with the inner wall of the second connecting pipe (42), and at least the second connecting pipe (42) abuts against the bottom of the limiting groove (122), and along the radial direction of the fluid channel (121), the second connecting pipe (42) is located between the connecting section (12) and the second filtering structure (52).

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