shutoff valve

Abstract

This disclosure discloses a gate valve, which includes a valve seat, a valve core assembly, and an operating assembly. The valve seat is provided with a first pipe and a second pipe. The valve core assembly includes a moving valve core and a stationary valve core. The stationary valve core is disposed in the valve seat and located between the first pipe and the second pipe. The stationary valve core is provided with a first through hole that connects the first pipe and the second pipe. The operating assembly is partially located inside the valve seat and connected to the moving valve core. The operating assembly includes an operating element, which is at least partially disposed outside the valve seat. Along the axial direction of the valve seat, the moving valve core is located between the first pipe and the second pipe and is fitted against the stationary valve core. By rotating the operating element, the operating assembly drives the moving valve core to rotate relative to the stationary valve core. When the moving valve core rotates to the point of blocking the first through hole, the first pipe and the second pipe are disconnected. When the moving valve core rotates to the point of not blocking the first through hole, the first pipe and the second pipe are connected.

Description

Technical Field

[0001] This disclosure relates to the field of valve technology, and more particularly to a gate valve. Background Technology

[0002] Gate valves are widely used in air conditioning system piping to control the on / off state of the pipes. One existing manually adjustable gate valve uses a threaded structure to achieve its regulating function. Specifically, it utilizes the threaded engagement between the valve core and the valve seat or operating mechanism. When the operator rotates the operating mechanism, it drives the valve core to rotate, thereby moving the valve core axially under the action of the threaded structure, thus controlling the opening and closing of the valve. However, because of its threaded structure, this type of manually adjustable gate valve requires the operator to turn it multiple times to switch the valve on / off, resulting in slow switching speeds and requiring considerable time and effort. Furthermore, the existing solution requires a considerable amount of space within the valve body to accommodate the threads, leading to an excessively large gate valve size, making it difficult to meet the requirements of miniaturization designs. Summary of the Invention

[0003] A primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above, and to provide a shut-off valve that is fast to switch, easy to operate, and conducive to miniaturization design requirements.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0005] According to one aspect of this disclosure, a shut-off valve is provided, comprising a valve seat, a valve core assembly, and an operating assembly; the valve seat is provided with a first conduit and a second conduit; the valve core assembly includes a movable valve core and a stationary valve core, the stationary valve core being disposed in the valve seat and located between the first conduit and the second conduit, the stationary valve core being provided with a first through hole, the first through hole being able to connect the first conduit and the second conduit; the operating assembly is partially located inside the valve seat and connected to the movable valve core, the operating assembly including an operating member, the operating member being at least partially disposed outside the valve seat; along the axial direction of the valve seat, the movable valve core is located between the first conduit and the second conduit and is fitted against the stationary valve core, by rotating the operating member, the operating assembly drives the movable valve core to rotate relative to the stationary valve core, when the movable valve core rotates to the point of blocking the first through hole, the first conduit and the second conduit are disconnected, when the movable valve core rotates to the point of not blocking the first through hole, the first conduit and the second conduit are connected.

[0006] According to one embodiment of this disclosure, the first conduit is disposed at one end of the valve seat in a first direction, and the second conduit is disposed on one side of the valve seat in a second direction perpendicular to the first direction; the moving valve core and the stationary valve core are arranged along the first direction, and the moving valve core is located on the side of the stationary valve core facing away from the first conduit in the first direction; wherein, the valve core assembly is connected to the side of the moving valve core facing away from the stationary valve core in the first direction, and the operating member is disposed at the other end of the valve seat in the first direction.

[0007] According to one embodiment of this disclosure, the valve seat has an opening at the other end in the first direction; the shut-off valve further includes a limiting retaining ring, which is fixed to the opening and has a second through hole extending along the first direction; the operating component further includes a connecting rod, which extends along the first direction and passes through the second through hole, and the connecting rod connects the operating component and the moving valve core.

[0008] According to one embodiment of this disclosure, the limiting ring and the valve seat are fixedly connected by a constant pressure clamping welding method.

[0009] According to one embodiment of this disclosure, the connecting rod includes a first part and a second part connected along the first direction. The first part passes through the second through hole and is connected to the operating member, and the second part is connected to the moving valve core. The second part is located on the side of the limiting ring close to the valve core assembly. A limiting surface facing the limiting ring is provided at the position where the second part connects to the first part. A sealing gasket is provided between the limiting surface and the surface of the limiting ring facing the valve core assembly.

[0010] According to one embodiment of this disclosure, the connecting rod includes a first part and a second part connected along the first direction, the first part passing through the second through hole and connected to the operating member, and the second part connected to the moving valve core; wherein, a first sealing ring is provided between the first part and the hole wall of the second through hole.

[0011] According to one embodiment of this disclosure, the portion of the connecting rod located within the second through hole is provided with a stop surface, and the wall of the second through hole is provided with a stop protrusion, which is used to stop the connecting rod from continuing to rotate when the connecting rod rotates relative to the limiting retaining ring until the stop surface abuts against the stop protrusion. When the stop surface abuts against the stop protrusion, the moving valve core blocks the first through hole.

[0012] According to one embodiment of this disclosure, the stationary valve core is provided with two first through holes, which are evenly arranged circumferentially; wherein, the connecting rod is provided with two abutment surfaces, which face opposite sides in a third direction perpendicular to the first direction; the wall of the second through hole is provided with two abutment protrusions, which circumferentially divide the second through hole equally; wherein, when the two abutment surfaces abut against the two abutment protrusions respectively, the moving valve core blocks the two first through holes.

[0013] According to one embodiment of this disclosure, a first mounting groove is provided on the side surface of the actuating member facing the connecting rod, and the end of the connecting rod away from the valve core assembly extends into the first mounting groove; wherein, the shape of at least a portion of the groove wall of the first mounting groove matches the shape of the abutment surface to restrict relative rotation between the connecting rod and the actuating member.

[0014] According to one embodiment of this disclosure, the end of the limiting ring away from the valve core assembly extends out of the opening and has a first limiting protrusion at its periphery; the operating member includes a barrier extending along the first direction and located on the outer periphery of the opening, and a second limiting protrusion is provided on the inner periphery of the barrier; wherein the second limiting protrusion is located on the side of the first limiting protrusion closer to the valve core assembly, so as to limit the relative position of the operating member and the limiting ring along the first direction.

[0015] According to one embodiment of this disclosure, wherein: the surface of the first limiting protrusion near the valve core assembly is a plane perpendicular to the first direction, and the surface of the second limiting protrusion away from the valve core assembly is a plane perpendicular to the first direction; and / or, the surface of the first limiting protrusion away from the valve core assembly is an inclined plane relatively inclined to the first direction; and / or, the surface of the second limiting protrusion near the valve core assembly is an inclined plane relatively inclined to the first direction.

[0016] According to one embodiment of this disclosure, the moving valve core has a second mounting groove on the side surface facing away from the stationary valve core, and the connecting rod has a connecting arm, part of which extends into the second mounting groove.

[0017] According to one embodiment of this disclosure, the moving valve core is provided with at least two second mounting slots arranged circumferentially at intervals, and the connecting rod is provided with at least two connecting arms arranged circumferentially at intervals, with the at least two connecting arms extending into the at least two mounting slots respectively.

[0018] According to one embodiment of this disclosure, the moving valve core includes at least two blocking portions arranged in a petal shape, at least two second mounting grooves are respectively disposed on at least two of the blocking portions, and a conduction gap is formed between adjacent blocking portions; the stationary valve core is provided with at least two first through holes arranged circumferentially at intervals; wherein, when the moving valve core rotates to the point where at least two of the blocking portions respectively block at least two of the first through holes, the first pipe is disconnected from the second pipe, and when the moving valve core rotates to the point where at least two of the conduction gaps respectively expose at least two of the first through holes, the first pipe is connected to the second pipe.

[0019] According to one embodiment of this disclosure, the operating member is a rotary cap structure and includes an end plate and a retaining wall, the retaining wall being connected to the periphery of the end plate and extending toward the side of the end plate facing the valve core assembly; wherein: the outer periphery of the retaining wall is provided with friction texture; and / or, the outer periphery of the retaining wall is provided with at least one operating plane; and / or, the outer periphery of the retaining wall is provided with an operating protrusion.

[0020] As can be seen from the above technical solution, the advantages and positive effects of the gate valve proposed in this disclosure are as follows:

[0021] The gate valve disclosed herein includes an operating assembly, partly located inside the valve seat and connected to the moving valve core of the valve core assembly. The operating assembly includes an operating element, at least partially disposed outside the valve seat. The operating assembly is used by the operator to rotate the moving valve core. Accordingly, when the moving valve core rotates to block the first through hole of the stationary valve core, the first and second pipes of the valve seat are disconnected; when the moving valve core rotates to not block the first through hole, the first and second pipes are connected. Through the above design, this disclosure utilizes the operating assembly to connect and drive the moving valve core to rotate, realizing the switching between the on and off states of the valve core assembly, thereby realizing the manual operation control of the gate valve to shut off the pipeline. Accordingly, this disclosure can realize the regulating function of the gate valve by directly driving the moving valve core to rotate circumferentially through the operating assembly, that is, the operator's rotation operation of the operating element is directly transmitted to the rotation of the moving valve core, realizing rapid switching operation and saving time and effort. In addition, since the moving valve core does not need to move axially to achieve switching, this disclosure can achieve a smaller structural design, suitable for meeting the design requirements of miniaturization. Attached Figure Description

[0022] The various objectives, features, and advantages of this disclosure will become more apparent from the following detailed description of preferred embodiments of the disclosure taken in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0023] Figure 1This is a schematic diagram of the structure of a shut-off valve according to an exemplary embodiment;

[0024] Figure 2 yes Figure 1 A perspective sectional view of the shut-off valve is shown.

[0025] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0026] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the diagram;

[0027] Figure 5 yes Figure 1 An exploded three-dimensional diagram of the shut-off valve is shown.

[0028] Figure 6 yes Figure 1 An enlarged schematic diagram of a portion of the structure of the shut-off valve is shown;

[0029] Figure 7 yes Figure 1 An exploded perspective view of the valve core assembly of the shut-off valve is shown.

[0030] Figure 8 yes Figure 1 An enlarged schematic diagram of another part of the shut-off valve structure is shown;

[0031] Figure 9 yes Figure 8 The diagram shown is a three-dimensional exploded view of part of the structure;

[0032] Figure 10 yes Figure 1 A schematic diagram of the operating mechanism of the shut-off valve is shown.

[0033] Figure 11 and Figure 12 These are schematic diagrams of the shut-off valves shown according to two other exemplary embodiments.

[0034] The annotations in the attached figures are explained as follows:

[0035] 100. Valve seat; 312. Enclosure; 420. Sealing gasket;

[0036] 101. First opening; 3121. Second limiting protrusion; 430. First sealing ring;

[0037] 102. Second opening; 3122. Friction pattern; 510. Bottom valve seat;

[0038] 103. Third opening; 3123. Operating protrusion; 511. Receiving groove;

[0039] 104. Fourth opening; 313. End plate; 520. Second sealing ring;

[0040] 200. Valve core assembly; 320. Connecting rod; 530. Base plate;

[0041] 210. Moving valve core; 321. First part; 531. Flange structure;

[0042] 2101. Conductor gap; 322. Second part; 610. First connector;

[0043] 211. Second assembly slot; 3221. Limiting surface; 620. First bushing;

[0044] 212. Shielding part; 323. Stopping surface; 710. Second connecting pipe;

[0045] 220. Static valve core; 324. Connecting arm; 720. Second bushing;

[0046] 2201. First through hole; 325. Annular groove; 810. Valve nozzle;

[0047] 221. Positioning protrusion; 410. Limiting retaining ring; 820. Valve core;

[0048] 300. Control component; 4101. Second through hole; 830. Valve cap;

[0049] 310. Operating element; 411. Stop protrusion; 840. Third sealing ring;

[0050] 311. First assembly groove; 412. First limiting protrusion; S1~S3. Surface. Detailed Implementation

[0051] Typical embodiments embodying the features and advantages of this disclosure will be described in detail in the following description. It should be understood that this disclosure can have various variations in different embodiments without departing from the scope of this disclosure, and the descriptions and drawings therein are illustrative in nature and not intended to limit this disclosure.

[0052] In the following description of various exemplary embodiments of this disclosure, reference is made to the accompanying drawings, which form part of this disclosure, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of this disclosure. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of this disclosure. Furthermore, while the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of this disclosure, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this disclosure.

[0053] See Figure 1 The diagram illustrates a typical example of the structure of the shut-off valve proposed in this disclosure. In this exemplary embodiment, the shut-off valve proposed in this disclosure is described using an application in an air conditioning system piping as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this disclosure to piping scenarios, and these changes are still within the scope of the principles of the shut-off valve proposed in this disclosure.

[0054] like Figure 1 As shown, in one embodiment of this disclosure, the shut-off valve includes a valve seat 100, a valve core assembly 200, and an operating assembly 300. (See also...) Figures 2 to 10 , Figure 2 The image shows a representative three-dimensional sectional view of the shut-off valve; Figure 3 China representatively shows Figure 2 A magnified view of a portion of the image; Figure 4 China representatively shows Figure 3 An enlarged schematic diagram of part A in the diagram; Figure 5 The diagram shows a representative three-dimensional exploded view of the shut-off valve; Figure 6 The diagram shows a typical enlarged schematic of a portion of the structure of the shut-off valve, specifically illustrating the combined structure of the valve core assembly 200 and the connecting rod 320. Figure 7 The figure shows a representative three-dimensional exploded view of the valve core assembly 200; Figure 8 The diagram shows an enlarged view of another part of the gate valve structure, specifically the combination of the limit ring 410 and the connecting rod 320. Figure 9 The diagram shows a representative three-dimensional exploded view of the limiting retaining ring 410 and the connecting rod 320; Figure 10The diagram above shows a representative structural schematic of the actuating element 310 of the gate valve. The structure, connection method, and functional relationship of the main components of the gate valve proposed in this disclosure will be described in detail below with reference to the above-mentioned figures.

[0055] like Figures 1 to 3 , Figure 6As shown, in one embodiment of this disclosure, the valve seat 100 is provided with a first pipe and a second pipe. For example, the valve seat 100 may be provided with a first opening 101 and a second opening 102, and the first opening 101 and the second opening 102 are respectively connected to a pipeline structure (e.g., the first connecting pipe 610 and the second connecting pipe 710 described below). The valve core assembly 200 includes a moving valve core 210 and a stationary valve core 220. The stationary valve core 220 is disposed in the valve seat 100 and is located between the first pipe and the second pipe. The stationary valve core 220 is provided with a first through hole 2201, which can connect (e.g., when the first through hole 2201 is not blocked by the moving valve core 210) the first pipe and the second pipe. The actuating assembly 300 is partially located inside the valve seat 100 and connected to the moving valve core 210. The actuating assembly 300 includes an actuating member 310, which is at least partially disposed outside the valve seat 100. Along the axial direction of the valve seat 100, the moving valve core 210 is located between the first pipe and the second pipe, that is, the moving valve core 210 is located above the stationary valve core 220, and the moving valve core 210 and the stationary valve core 220 are fitted together. By rotating the operating member 310, the operating component 300 drives the moving valve core 210 to rotate relative to the stationary valve core 220. When the moving valve core 210 rotates to block the first through hole 2201, the first pipe and the second pipe are disconnected because the moving valve core 210 and the stationary valve core 220 are fitted together. When the moving valve core 210 rotates to not block the first through hole 2201, the first pipe and the second pipe are connected. It should be noted that "blocking the first through hole 2201" means that the first pipeline and the second pipeline can only be disconnected when the moving valve core 210 rotates to completely block the first through hole 2201. "Not blocking the first through hole 2201" means that the first pipeline and the second pipeline can be connected (e.g., fully open, half-open, etc.) when the moving valve core 210 rotates to expose part or all of the first through hole 2201. Through the above design, this disclosure utilizes the operating component 300 to connect to and drive the moving valve core 210 to rotate, realizing the switching between the on and off states of the valve core assembly 200, thereby achieving the manual operation control of the shut-off valve to shut off the pipeline. Accordingly, this disclosure can directly drive the moving valve core 210 to rotate circumferentially through the operating component 300 to achieve the regulating function of the shut-off valve. That is, the operator's rotation operation of the operating component 310 is directly transmitted to the rotation of the moving valve core 210, achieving rapid switching operation and saving time and effort. Furthermore, since the moving valve core 210 can switch on and off without axial movement, for example, there is no need to provide an axially threaded section of a certain length within the valve seat 100, this disclosure enables a smaller structural design, suitable for meeting miniaturization requirements. Moreover, compared to electrically driven shut-off valves, this disclosure has fewer components, a simpler structure, a simpler assembly process, lower cost and energy consumption, and can provide stable pipeline shut-off function under special operating conditions such as power outages, which helps improve system stability and reliability.

[0056] like Figure 5 As shown, in one embodiment of this disclosure, a first pipe is disposed at one end of the valve seat 100 in a first direction, which can be referred to as direction D1 shown in the accompanying drawings. A second pipe is disposed on one side of the valve seat 100 in a second direction, which is perpendicular to the first direction and can be referred to as direction D2 shown in the accompanying drawings. The moving valve core 210 and the stationary valve core 220 are arranged along the first direction, that is, the moving valve core 210 is located on the side of the stationary valve core 220 facing away from the first pipe in the first direction. Based on this, a valve core assembly 200 is connected to the side of the moving valve core 210 facing away from the stationary valve core 220 in the first direction, and an operating member 310 can be disposed at the other end of the valve seat 100 in the first direction. Through the above design, this disclosure can achieve a relatively perpendicular arrangement of the first pipe and the second pipe. In other embodiments of this disclosure, the first pipe and the second pipe can also adopt other arrangement forms. For example, the first pipe and the second pipe can be located at opposite ends of the valve seat 100 in the first direction, and the operating member 310 can be disposed on one side of the valve seat 100 in the second direction, and this embodiment is not limited to this one.

[0057] like Figure 5 As shown, based on the design of the actuating element 310 being disposed at the other end of the valve seat 100 in the first direction, in one embodiment of this disclosure, the valve seat 100 is provided with an opening at the other end in the first direction. This opening is referred to as the third opening 103 in this specification to distinguish it from the aforementioned first opening 101 and second opening 102 of the valve seat 100. Furthermore, the shut-off valve proposed in this disclosure may also include a retaining ring 410, which is fixed to the third opening 103. The retaining ring 410 is provided with a second through hole 4101 extending along the first direction. The actuating component 300 may also include a connecting rod 320, which extends along the first direction and passes through the second through hole 4101. The connecting rod 320 connects the actuating element 310 and the moving valve core 210. Through the above design, this disclosure uses a connecting rod 320 to connect the operating element 310 and the moving valve core 210, so as to realize the function of transmitting torque when the operator applies force to rotate the operating element 310, and transfer the torque to the moving valve core 210 to achieve the purpose of driving the moving valve core 210 to rotate, thereby enabling the first valve port and the second valve port of the shut-off valve to be manually switched between the on and off states.

[0058] Based on the design of the gate valve including the limiting retaining ring 410, in one embodiment of this disclosure, the limiting retaining ring 410 and the valve seat 100 (e.g., at the third opening 103) can be fixedly connected by constant pressure compression welding. Furthermore, the limiting retaining ring 410 and the valve seat 100 can be fixedly connected by laser welding. Through the above design, this disclosure can ensure the preload force (e.g., along the first direction) between the moving valve core 210 and the stationary valve core 220, and can prevent the loosening of multiple components of the gate valve (e.g., including the valve seat 100 assembly, connecting rod 320, sealing gasket 420, bottom valve seat 510, and second sealing ring 520), thereby improving the overall stability and reliability of the gate valve structure.

[0059] like Figure 3 , Figure 5 and Figure 6 As shown, based on the design of the shut-off valve including the limiting retaining ring 410, in one embodiment of this disclosure, the connecting rod 320 may include a first part 321 and a second part 322 connected along a first direction. The first part 321 passes through the second through hole 4101 and connects to the operating member 310, and the second part 322 connects to the moving valve core 210. Furthermore, the second part 322 is located on the side of the limiting retaining ring 410 near the valve core assembly 200. A limiting surface 3221 facing the limiting retaining ring 410 is provided at the position where the second part 322 connects to the first part 321. A sealing gasket 420 is provided between the limiting surface 3221 and the surface of the limiting retaining ring 410 facing the valve core assembly 200. Through the above design, this disclosure can achieve a seal between the limiting retaining ring 410 and the connecting rod 320 using the sealing gasket 420, ensuring the sealing performance of the shut-off valve and preventing leakage at the second through hole 4101. Furthermore, since the retaining ring 410 and the connecting rod 320 are usually made of metal, this disclosure can utilize a sealing gasket 420 made of a material with relatively low hardness (such as plastic) to avoid hard wear between the metals of the retaining ring 410 and the connecting rod 320.

[0060] like Figure 3 , Figure 5 and Figure 6 As shown, based on the design of the stop valve including the limiting retaining ring 410, in one embodiment of this disclosure, taking the connecting rod 320 including a first part 321 and a second part 322 as an example, a first sealing ring 430 can be provided between the first part 321 and the wall of the second through hole 4101. Through the above design, this disclosure can use the first sealing ring 430 to achieve a seal between the second through hole 4101 and the connecting rod 320, ensuring the sealing performance of the stop valve and preventing leakage of the stop valve at the second through hole 4101.

[0061] Furthermore, such as Figure 3As shown, the aforementioned sealing gasket 420 and first sealing ring 430 can be simultaneously provided between the connecting rod 320 and the limiting retaining ring 410, thereby forming two sealing structures between the connecting rod 320 and the limiting retaining ring 410, further improving the sealing performance. In other embodiments of this disclosure, only one of the aforementioned sealing gasket 420 and first sealing ring 430 may be provided, or other sealing structures may be used to achieve the seal between the connecting rod 320 and the limiting retaining ring 410, and this embodiment is not limited to this one.

[0062] like Figure 3 and Figure 6 As shown, based on the design of a first sealing ring 430 disposed between the first part 321 and the hole wall of the second through hole 4101, in one embodiment of this disclosure, an annular groove 325 may be disposed on the outer periphery of the first part 321 of the connecting rod 320. This annular groove 325 is used to accommodate part of the first sealing ring 430. In other embodiments of this disclosure, an annular receiving groove structure may also be disposed on the hole wall of the second through hole 4101 to accommodate the first sealing ring 430, or annular receiving grooves may be disposed on the outer periphery of the first part 321 and the hole wall of the second through hole 4101 to jointly accommodate the first sealing ring 430, and this embodiment is not limited to this one.

[0063] like Figure 8 and Figure 9 As shown, based on the design of the shut-off valve including the limiting retaining ring 410, in one embodiment of this disclosure, the portion of the connecting rod 320 located within the second through hole 4101 is provided with a stop surface 323, and the wall of the second through hole 4101 is provided with a stop protrusion 411. This protrusion stops the connecting rod 320 from continuing to rotate when it rotates relative to the limiting retaining ring 410 until the stop surface 323 abuts against the stop protrusion 411. When the stop surface 323 abuts against the stop protrusion 411, the moving valve core 210 blocks the first through hole 2201. Through this design, during the process of the operator manipulating the operating element 310 to drive the moving valve core 210 to rotate, when the stop surface 323 is against the stop protrusion 411, the operator will receive a force feedback that the connecting rod 320 (i.e., the operating element 310) cannot continue to rotate. Based on this, the operator can accurately determine whether the shut-off valve has switched to the off state, without needing to rely on experience or reference flow changes to determine whether the shut-off valve has switched to the off state. This makes operation convenient and highly accurate.

[0064] like Figure 6 , Figure 7 and Figure 9As shown, based on the design of the connecting rod 320 having a stop surface 323 and the second through hole 4101 having a stop protrusion 411, in one embodiment of this disclosure, the stationary valve core 220 can be provided with two first through holes 2201, which are evenly arranged circumferentially. For example, each first through hole 2201 corresponds to an arc range of approximately 90° in the circumferential direction, and the moving valve core 210 includes two blocking portions 212, each of which corresponds to an arc range of approximately 90° in the circumferential direction. Based on this, the connecting rod 320 can be provided with two stop surfaces 323, which face opposite sides in a third direction, perpendicular to the first direction, and the third direction can be referred to as D3 in the accompanying drawings. Furthermore, the wall of the second through hole 4101 can be provided with two stop protrusions 411, which circumferentially divide the second through hole 4101 equally. Accordingly, when the two abutting surfaces 323 abut against the two abutting protrusions 411 respectively, the moving valve core 210 blocks the two first through holes 2201. Through the above design, this disclosure can realize the 180° rotation operation of the connecting rod 320 (i.e., the operating member 310). Specifically, when the two abutting surfaces 323 abut against the two abutting protrusions 411 respectively, that is, abutting against each side of the two abutting protrusions 411 in the circumferential direction, the shut-off valve is in the open state. Rotating the operating member 310 drives the connecting rod 320 to rotate, so that the two abutting surfaces 323 move away from the abutting protrusions 411 they abut against, until they rotate about 180° (the so-called "about" is to take into account that the abutting protrusions 411 also have a certain length in the axial direction, that is, the corresponding arc length angle), so that the two abutting surfaces 323 abut against the other side of the two abutting protrusions 411 in the circumferential direction, and the abutting protrusions 411 abutted by the two abutting surfaces 323 are interchanged compared to before the rotation of 180°. At this time, the shut-off valve is still in the open state. During the aforementioned 180° rotation, the shut-off valve can be understood as being in a conducting state. The opening of the valve core assembly 200 (i.e., the area of ​​the first through-hole 2201 not blocked by the passive valve core 210) gradually increases from 0 to 90° and gradually decreases from 90° to 180°. That is, in this embodiment, the rotation angle by which the operating actuator 310 switches the shut-off valve's on / off state is approximately 90°. However, considering that the circumferential range (e.g., arc length) of the blocking portion 212 of the moving valve core 210 may be slightly larger than the first through-hole 2201—for example, each first through-hole 2201 corresponds to an arc range of approximately 85° circumferentially, and each blocking portion 212 corresponds to an arc range of approximately 95° circumferentially—the shut-off valve may remain in an open state within a certain angle range at the start of rotation (e.g., rotation angles from 0 to 5° and from 175° to 180°).

[0065] It should be noted that this embodiment is described using the example of achieving approximately 180° rotation of the operating member 310 through two abutment surfaces 323 and two abutment protrusions 411. In other embodiments of this disclosure, the design of the abutment surfaces 323 and abutment protrusions 411 is still taken as an example. The number or arrangement of the abutment surfaces 323 and abutment protrusions 411 can also be designed in other ways to achieve rotation switching operations in other angle ranges. For example, taking two abutment surfaces 323 and two first through holes 2201 as an example, there can also be one abutment protrusion 411. When one abutment surface 323 abuts with the abutment protrusion 411, the shut-off valve is in the open state, and the connecting rod 320 rotates approximately 180°. When the abutment surface 323 abuts with the abutment protrusion 411 again on the other side in the circumferential direction, the shut-off valve is still not in the open state, that is, the other abutment surface 323 does not abut with the abutment protrusion 411. This is not limited to this embodiment.

[0066] like Figure 3 and Figure 10 As shown, based on the design of the connecting rod 320 having a stop surface 323, in one embodiment of this disclosure, the side surface of the operating member 310 (e.g., end plate 313) facing the connecting rod 320 may be provided with a first mounting groove 311, and the end of the connecting rod 320 away from the valve core assembly 200 extends into the first mounting groove 311. Furthermore, the shape of at least a portion of the groove wall of the first mounting groove 311 may match the shape of the stop surface 323 to restrict relative rotation between the connecting rod 320 and the operating member 310. Through the above design, based on the connection between the connecting rod 320 and the operating member 310, this disclosure utilizes the first assembly groove 311 to accommodate the connecting rod 320, and utilizes part of the groove wall of the first assembly groove 311 to abut against the stop surface 323, so that when the operating member 310 is rotated by the operator, the torque can be transmitted to the connecting rod 320 through the abutment between the surfaces, avoiding relative sliding between the connecting rod 320 and the first assembly groove 311 during the rotation process. Furthermore, the stop surface 323 of the connecting rod 320 simultaneously achieves the cooperation with the stop protrusion 411 and the first assembly groove 311, which simplifies the structural complexity of the connecting rod 320 and reduces its processing difficulty. In other embodiments of this disclosure, in order to limit the connection between the connecting rod 320 and the groove wall of the first assembly groove 311, a separate abutment plane can be provided at the end of the connecting rod 320 that connects to the operating member 310. For example, the end can be designed with a polygonal cross-section (e.g., rectangular, triangular, regular hexagonal, etc.), and each groove wall of the first assembly groove 311 can be designed with a matching shape, without being affected by the shape of the abutment surface 323, and is not limited to this embodiment.

[0067] It should be noted that, based on the design of the connecting rod 320 extending into the first assembly groove 311 and utilizing the abutment surface 323 to engage with the groove wall, the connecting rod 320 and the operating member 310 in this embodiment may not have a fixed connection. That is, the torque transmission when the operating member 310 drives the connecting rod 320 to rotate can be mainly achieved by the abutment surface 323 against the groove wall of the first assembly groove 311. Through the above design, this disclosure facilitates the disassembly of the connecting rod 320 and the operating member 310, thereby enabling individual replacement of components and reducing maintenance costs. In other embodiments of this disclosure, one end of the connecting rod 320 may also be fixedly connected to the operating member 310, such as by welding or connecting parts, and is not limited to this embodiment.

[0068] like Figure 4 and Figure 10 As shown, based on the design of the shut-off valve including the limiting ring 410, in one embodiment of this disclosure, the end of the limiting ring 410 away from the valve core assembly 200 can extend out of the third opening 103, and the end of the limiting ring 410 extending out of the third opening 103 can be provided with a first limiting protrusion 412 on its periphery. Furthermore, the operating member 310 can include a barrier 312 extending along the first direction and located on the outer periphery of the third opening 103. The inner periphery of the barrier 312 can be provided with a second limiting protrusion 3121, which is located on the side of the first limiting protrusion 412 closer to the valve core assembly 200, to limit the relative position of the operating member 310 and the limiting ring 410 along the first direction. Through the above structural design, this disclosure can achieve the limiting function of the operating component by utilizing the limiting cooperation of the first limiting protrusion 412 and the second limiting protrusion 3121, preventing the operating component 310 from falling off, and ensuring that the operating component 310 cannot be removed after assembly. This allows the operating component 310 and the connecting rod 320 to be integrated into one assembly, ensuring that the operating component 310 will not fall off when the connecting rod 320 rotates synchronously when the operating component 310 is rotated. In particular, when the connecting rod 320 and the operating component 310 do not have a fixed connection relationship, this disclosure can still achieve the relative positioning of the connecting rod 320 and the operating component 310 along the first direction through the limiting cooperation of the first limiting protrusion 412 and the second limiting protrusion 3121, and achieve relative positioning in the circumferential direction through the abutment cooperation between the stop surface 323 and the groove wall of the first assembly groove 311.

[0069] like Figure 4As shown, based on the cooperative design of the first limiting protrusion 412 and the second limiting protrusion 3121, in one embodiment of this disclosure, the surface S1 of the first limiting protrusion 412 near the valve core assembly 200 (e.g., the lower surface shown in the figure) can be a plane perpendicular to the first direction, and the surface S2 of the second limiting protrusion 3121 away from the valve core assembly 200 (e.g., the upper surface shown in the figure) can be a plane perpendicular to the first direction. Through the above design, this disclosure uses planar designs for the opposing surfaces of the first limiting protrusion 412 and the second limiting protrusion 3121, which can further optimize the limiting effect of the first limiting protrusion 412 and the second limiting protrusion 3121.

[0070] like Figure 4 As shown, based on the cooperative design of the first limiting protrusion 412 and the second limiting protrusion 3121, in one embodiment of this disclosure, the surface S3 of the second limiting protrusion 3121 near the valve core assembly 200 (e.g., the lower surface shown in the figure) can be an inclined surface relative to the first direction. In other words, when the second limiting protrusion 3121 is annular and disposed on the inner wall of the enclosure 312, the three-dimensional shape of the surface S3 is a conical surface. Through the above design, this disclosure can utilize the aforementioned inclined surface to achieve the inclined pressing and guiding effect of the operating member 310 and the connecting rod 320 during assembly, making the assembly operation more convenient and labor-saving. In other embodiments of this disclosure, the surface of the first limiting protrusion 412 away from the valve core assembly 200 can also be an inclined surface relative to the first direction, and is not limited to this embodiment.

[0071] like Figure 6 and Figure 7 As shown, in one embodiment of this disclosure, a second mounting groove 211 may be provided on the surface of the moving valve core 210 facing away from the stationary valve core 220, and a connecting arm 234 is provided on the connecting rod 320, a portion of which extends into the second mounting groove 211. Accordingly, when the connecting rod 320 rotates, the connecting arm 234 abuts against the groove wall of the second mounting groove 211, thereby transferring torque to the moving valve core 210.

[0072] It should be noted that, based on the design of the connecting arm 234 extending into the second assembly groove 211, the connecting rod 320 and the moving valve core 210 in this embodiment may not have a fixed connection. That is, the torque transmission when the connecting rod 320 drives the moving valve core 210 to rotate can be mainly achieved by the abutment between the connecting arm 234 and the groove wall of the second assembly groove 211. Through the above design, this disclosure facilitates the disassembly of the connecting rod 320 and the moving valve core 210, thereby enabling individual replacement of parts and reducing maintenance costs. In other embodiments of this disclosure, the connecting rod 320 may also be fixedly connected to the moving valve core 210, such as by welding or connecting parts, and is not limited to this embodiment.

[0073] like Figure 6 and Figure 7 As shown, based on the cooperative design of the connecting arm 234 and the second mounting groove 211, in one embodiment of this disclosure, the moving valve core 210 may be provided with at least two second mounting grooves 211 arranged circumferentially at intervals, such as, but not limited to, the two second mounting grooves 211 shown in the figures. Furthermore, the connecting rod 320 may be provided with at least two connecting arms 234 arranged circumferentially at intervals, such as, but not limited to, the two connecting arms 234 shown in the figures. The at least two connecting arms 234 extend into at least two mounting grooves respectively. In other embodiments of this disclosure, the number of connecting arms 234 and the number of second mounting grooves 211 may also be one each, and this embodiment is not limited thereto.

[0074] like Figure 6 and Figure 7 As shown, based on the design of the moving valve core 210 having a second mounting groove 211, in one embodiment of this disclosure, the moving valve core 210 may include at least two blocking portions 212 arranged in a petal shape, such as, but not limited to, the two blocking portions 212 shown in the figures. Accordingly, at least two second mounting grooves 211 are respectively provided on at least two blocking portions 212, and a conduction notch 2101 is formed between adjacent blocking portions 212, for example, the moving valve core 210 shown in the figures has two conduction notches 2101. Furthermore, the stationary valve core 220 may be provided with at least two first through holes 2201 arranged circumferentially, such as, but not limited to, the two first through holes 2201 shown in the figures. Based on this, when the moving valve core 210 rotates to the point where at least two blocking portions 212 respectively block at least two first through holes 2201, the first pipe and the second pipe are disconnected; when the moving valve core 210 rotates to the point where at least two conduction notches 2101 respectively expose at least two first through holes 2201, the first pipe and the second pipe are connected.

[0075] like Figure 6 and Figure 7 As shown, in one embodiment of this disclosure, the periphery of the stationary valve core 220 may be provided with a positioning protrusion 221, specifically one or at least two, such as, but not limited to, the two positioning protrusions 221 shown in the figures. Correspondingly, the inner wall of the valve seat 100 may be provided with a positioning groove corresponding to the positioning protrusion 221. The positioning protrusion 221 is accommodated in the positioning groove, realizing the relative positioning of the stationary valve core 220 and the valve seat 100 in the circumferential direction. This avoids the stationary valve core 220 from rotating when the moving valve core 210 rotates due to the frictional force between it and the moving valve core 210 (e.g., the frictional force generated by the aforementioned constant pressure design), thus ensuring the stability and reliability of the shut-off valve's switching function.

[0076] Based on the design of the shut-off valve including the sealing gasket 420, in one embodiment of this disclosure, the sealing gasket 420 may be made of polytetrafluoroethylene (PTFE).

[0077] In one embodiment of this disclosure, the valve seat 100 can be made of stainless steel. Through the above design, this disclosure has superior rust prevention performance.

[0078] In one embodiment of this disclosure, the control member 310 can be made of stainless steel. Through the above design, this disclosure has superior rust resistance.

[0079] In one embodiment of this disclosure, the connecting rod 320 can be made of stainless steel. Through the above design, this disclosure has superior rust resistance.

[0080] In one embodiment of this disclosure, the limiting retaining ring 410 can be made of stainless steel. Through the above design, this disclosure has superior rust prevention performance.

[0081] In one embodiment of this disclosure, the valve core assembly 200 (e.g., the moving valve core 210 and the stationary valve core 220) can be made of ceramic, for example, the moving valve core 210 and the stationary valve core 220 can each be ceramic discs. Through this design, the ceramic disc sealing surface has good roughness and is wear-resistant, thereby significantly improving the switching life of the shut-off valve.

[0082] like Figure 1 and Figure 10 As shown, in one embodiment of this disclosure, the operating member 310 can be a screw cap structure, and the screw cap structure can include an end plate 313 and a retaining wall 312. The retaining wall 312 is connected to the periphery of the end plate 313 and extends toward the side of the end plate 313 facing the valve core assembly 200. Based on this, the outer periphery of the retaining wall 312 can be provided with friction textures 3122, such as vertical lines (extending along the first direction), mesh patterns, dotted patterns, etc. Through the above design, this disclosure utilizes the screw cap structure of the operating member 310 to make it more convenient for the operator to hold and apply force, while the friction textures 3122 increase the friction when turning the operating member 310, making operation more effortless and less prone to slippage.

[0083] See Figure 11 , Figure 11 The diagram below shows a schematic representation of a shut-off valve that embodies the principles of this disclosure in another exemplary embodiment.

[0084] like Figure 11As shown, in one embodiment of this disclosure, taking the design of the control member 310 including the enclosure 312 as an example, six control planes can be provided on the outer periphery of the enclosure 312. Furthermore, these six control planes can form a regular hexagonal cross-sectional shape, such as the hexagonal nut-like structure shown in the attached figure. Through the above structural design, this disclosure can make it more convenient for the operator to grip and apply force using the control planes. In other embodiments of this disclosure, the cross-section of the enclosure 132 can also be other regular polygons, such as squares, regular pentagons, etc., that is, the number of control planes can be three, four, five, or none or more. For example, the outer periphery of the enclosure 312 can be provided with only one control plane. For instance, the cross-sectional outline of the enclosure 312 can include an arc and a straight line, the corresponding angle of the arc can be greater than 180°, and the straight line corresponds to the aforementioned control plane. For example, the outer perimeter of the enclosure 312 may also be provided with two operating planes. For instance, the cross-sectional profile of the enclosure 312 may include two arcs and two straight lines. The corresponding angle of each arc may be less than 180°. The two ends of one arc connect to one end of each of the two straight lines, and the two ends of the other arc connect to the other end of each of the two straight lines. In other words, in various possible embodiments conforming to the design concept of this disclosure, the outer perimeter of the enclosure 312 may be provided with at least one operating plane.

[0085] See Figure 12 , Figure 12 The diagram below shows a schematic representation of a shut-off valve that embodies the principles of this disclosure in another exemplary embodiment.

[0086] like Figure 12 As shown, in one embodiment of this disclosure, taking the design of the control member 310 including the enclosure 312 as an example, the outer periphery of the enclosure 312 may be provided with control protrusions 3123. Furthermore, the control protrusions 3123 may be two as shown in the figures, or one, three or more.

[0087] It should be noted that, in Figure 1 , Figure 11 and Figure 12 In the several embodiments shown, this disclosure employs a special operating structure within the enclosure 312 of the operating member 310 to enable handheld operation by the operator, for example... Figure 1 Friction patterns 3122 in Figure 11 The control plane in Figure 12The control protrusions 3123, etc., are provided in the enclosure 312. In this way, the control structure provided in the enclosure 312 makes hand-held operation more convenient and easier for the operator to apply force, further improving usability. It should be understood that in other embodiments of the present disclosure, the control structure for hand-held operation can also be provided at other locations on the control member 310, such as on the top of the control member 310. Specifically, an upwardly protruding protrusion, such as an "I" shape or a cross shape, can be provided on the top surface of the control member 310 for hand-held operation, and is not limited to the embodiments shown in the above figures.

[0088] like Figure 5 As shown, in one embodiment of this disclosure, a bottom valve seat 510 is further provided within the valve seat 100. The bottom valve seat 510 is located at the first pipe and on the side of the stationary valve core 220 facing away from the moving valve core 210. A second sealing ring 520 is provided between the bottom valve seat 510 and the stationary valve core 220 to achieve a seal between them. Furthermore, the bottom valve seat 510 has a valve hole communicating with a first opening 101. The first opening 101 can be connected to a first connecting pipe 610 to form a first pipe. One end of the first connecting pipe 610 is connected to the bottom valve seat 510, and the other end can be provided with a first bushing 620, which connects to the system pipeline. The second opening 102 can be connected to a second connecting pipe 710 to form a second pipe. One end of the second connecting pipe 710 is connected to the valve seat 100, and the other end can be provided with a second bushing 720, which connects to the system pipeline.

[0089] like Figure 1 , Figure 3 and Figure 5As shown, in one embodiment of this disclosure, the valve seat 100 can be generally tubular in structure. One end of the tubular structure (e.g., the upper end shown in the figure) is a third opening 103, and the other end of the tubular structure (e.g., the lower end shown in the figure) is provided with a base plate 530. The base plate 530 has a through hole, and a bottom valve seat 510 is located on the side of the base plate 530 facing the third opening 103. The bottom valve seat 510 also has a through hole, and the through hole of the base plate 530 and the through hole of the bottom valve seat 510 are connected to each other to form a first pipe. Based on this, one end of the first connecting pipe 610 can extend into the valve seat 100 through the through hole of the base plate 530 and connect to the through hole of the bottom valve seat 510. The bottom valve seat 510 can be connected to the inner wall of the valve seat 100 via its outer peripheral surface and to the base plate 530 via its bottom surface. Furthermore, the bottom valve seat 510 can also partially extend into the through hole of the base plate 530, and this portion of the bottom valve seat 510 can connect with the wall of the through hole of the base plate 530. Based on this, if the through hole of the bottom valve seat 510 extends through the portion of the bottom valve seat 510 into the through hole of the base plate 530, then the first connecting pipe 610 can be connected to the wall of the through hole of the bottom valve seat 510. In addition, a flange 531 can be provided on the outer periphery of the base plate 530, and the flange 531 enables the installation of the shut-off valve in the system.

[0090] like Figure 5 As shown, in one embodiment of this disclosure, the shut-off valve may further include a valve component. Specifically, the valve seat 100 may have a fourth opening 104, which may be located on one side of the valve seat 100 in a fourth direction. Further, the fourth direction may be the aforementioned second direction, i.e., the fourth opening 104 and the second pipe may be located on opposite sides of the valve seat 100 in the second direction. The second pipe and the fourth opening 104 may be respectively arranged in the area between the limiting ring 410 and the valve core assembly 200. The fourth opening 104 is connected to a valve stem 810, one end of which is connected to the valve seat 100, and the other end is provided with a valve stem cap 830. A third sealing ring 840 is provided between the valve stem cap 830 and the valve stem 810. A valve core 820 is provided inside the valve stem 810.

[0091] As described above, in the production and assembly process of the gate valve proposed in this disclosure, multiple components can be fixedly connected to the valve seat 100 first. Then, the second sealing ring 520, the stationary valve core 220, the moving valve core 210, and the connecting rod 320 are sequentially installed through the third opening 103. Next, the valve seat 100 is fixedly connected to the limiting retaining ring 410, while the connecting rod 320 extends out from the second through hole 4101. Finally, the operating element 310 (e.g., a rotating cap structure) is pressed onto the limiting retaining ring 410, thus completing the assembly of the operating element 310 and the connecting rod 320. Specifically, multiple connection points, such as the connection between the bottom valve seat 510 and the valve seat 100 (including two connection points on the peripheral end face), the connection between the bottom valve seat 510 and the first connecting pipe 610, the connection between the valve seat 100 and the second connecting pipe 710, and the connection between the valve seat 100 and the third connecting pipe, can be simultaneously welded using an in-furnace brazing process.

[0092] It should be noted that the gate valves shown in the accompanying drawings and described in this specification are merely a few examples among many gate valves from which the principles of this disclosure can be employed. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the gate valves shown in the accompanying drawings or described in this specification.

[0093] In summary, the shut-off valve proposed in this disclosure includes an operating assembly 300, which is connected to the moving valve core 210 of the valve core assembly 200 and includes an operating element 310. The operating element 310 is at least partially disposed outside the valve seat 100. The operating assembly 300 is used by the operator to rotate the moving valve core 210. Accordingly, when the moving valve core 210 rotates to block the first through hole 2201 of the stationary valve core 220, the first and second pipes of the valve seat 100 are disconnected; when the moving valve core 210 rotates to not block the first through hole 2201, the first and second pipes are connected. Through the above design, this disclosure utilizes the operating assembly 300 to connect to and drive the moving valve core 210 to rotate, thereby switching the valve core assembly 200 between the on and off states, thus realizing the manual operation control function of the shut-off valve to shut off the pipeline. Accordingly, this disclosure enables the regulating function of the shut-off valve by directly driving the movable valve core 210 to rotate circumferentially through the operating component 300. That is, the operator's rotation operation on the operating component 310 is directly transmitted to the rotation of the movable valve core 210, achieving rapid switching operation and saving time and effort. In addition, since the movable valve core 210 does not need to move axially to achieve switching, this disclosure can achieve a smaller structural design, suitable for meeting the requirements of miniaturization.

[0094] Based on the detailed description of several exemplary embodiments of the shut-off valve proposed in this disclosure above, several exemplary embodiments of the manufacturing method of the shut-off valve proposed in this disclosure will be described below.

[0095] refer to Figure 3In one embodiment of this disclosure, the method for manufacturing the shut-off valve proposed in this disclosure includes:

[0096] Step S1: First welding, using furnace brazing process, simultaneously welding the first connecting pipe 610 to the valve seat 100 as the first pipe and welding the second connecting pipe 710 to the valve seat 100 as the second pipe; specifically, the first connecting pipe 610 can be welded to the first opening 101 of the valve seat 100, and the second connecting pipe 710 can be welded to the second opening 102 of the valve seat 100.

[0097] Step S2: Second welding. After the valve core assembly 200 is installed into the valve seat 100, the limit ring 410 is welded to the third opening 103 of the valve seat 100.

[0098] Through the above design, this disclosure can reduce the manufacturing steps of the gate valve, simplify the manufacturing process complexity, and help improve the production efficiency and reduce the production cost of the gate valve.

[0099] It should be noted that, in the above summary description of the manufacturing method of the gate valve proposed in this disclosure, the assembly of the valve core assembly 200 is only briefly described in order to highlight the design concept of two welding operations in the manufacturing method. It should be understood that, after the first welding and before the second welding, the process actually includes the steps of installing other components inside the valve seat 100, such as the valve core assembly 200, into the valve seat 100 and placing the limit ring 410 in a predetermined position according to a predetermined posture.

[0100] In one embodiment of this disclosure, the valve seat 100 is generally a tubular structure. One end of the tubular structure is a third opening 103, and the other end of the tubular structure is provided with a base plate 530. The base plate 530 has a through hole. A bottom valve seat 510 is located on the side of the base plate 530 facing the third opening 103. The bottom valve seat 510 also has a through hole, and the through hole of the base plate 530 and the through hole of the bottom valve seat 510 are connected to each other to form a first pipe. One end of the first connecting pipe 610 passes through the through hole of the base plate 530 and extends into the valve seat 100, connecting with the through hole of the bottom valve seat 510. The bottom valve seat 510 is connected to the inner wall of the valve seat 100 via its outer peripheral surface and to the base plate 530 via its bottom surface. A portion of the bottom valve seat 510 extends into the through hole of the base plate 530, and a portion of the bottom valve seat 510 is connected to the hole wall of the through hole of the base plate 530. The through hole of the bottom valve seat 510 extends through the portion of the bottom valve seat 510 into the through hole of the base plate 530, and the first connecting pipe 610 is connected to the hole wall of the through hole of the bottom valve seat 510.

[0101] like Figure 3As shown, based on the specific structural design of the shut-off valve described above, in one embodiment of this disclosure, the welding of the first connecting pipe 610 in the multiple simultaneous welding processes of step S1 during the "first welding" can include the welding connection between the base plate 530 and the valve seat 100, the welding connection between the bottom valve seat 510 and the valve seat 100, the welding connection between the bottom valve seat 510 and the base plate 530, and the welding connection between the bottom valve seat 510 and the first connecting pipe 610. Specifically, based on the specific structure of the bottom valve seat 510, the welding of the bottom valve seat 510 that can be achieved in step S1 includes at least: the welding connection between the outer peripheral surface of the bottom valve seat 510 and the inner wall of the valve seat 100, the welding connection between the bottom surface of the bottom valve seat 510 and the top surface of the base plate 530, the welding connection between the outer peripheral surface of the portion of the bottom valve seat 510 extending into the through hole of the base plate 530 and the wall of the through hole of the base plate 530, and the welding connection between the wall of the through hole of the bottom valve seat 510 and the outer peripheral surface of the first connecting pipe 610. Through the above design, this disclosure can further simplify the manufacturing process.

[0102] like Figure 3 As shown, in one embodiment of this disclosure, the bottom edge of the bottom valve seat 510 may be provided with a receiving groove 511, which can be used to receive solder. Accordingly, in the furnace brazing process of step S1, after the solder is heated and melted, it can flow to each welding interface of the bottom valve seat 510 (i.e., each gap between the bottom valve seat 510 and the valve seat 100, the bottom plate 530, and the first connecting pipe 610), and flow to the welding interface between the valve seat 100 and the bottom plate 530, thereby facilitating the simultaneous welding of the above welding interfaces in the furnace brazing process.

[0103] In one embodiment of this disclosure, when the other end of the first connector 610 is connected to the first sleeve 620, and the first connector 610 and the first sleeve 620 are connected by welding, the welding process of the first connector 610 and the first sleeve 620 can also be realized simultaneously in the furnace brazing process of step S1, thereby further simplifying the manufacturing process.

[0104] In one embodiment of this disclosure, when the other end of the second connector 710 is connected to the second sleeve 720, and the second connector 710 and the second sleeve 720 are connected by welding, the welding process of the second connector 710 and the second sleeve 720 can also be realized simultaneously in the furnace brazing process of step S1, thereby further simplifying the manufacturing process.

[0105] In one embodiment of this disclosure, when the shut-off valve further includes a valve nozzle 810 connected to the fourth opening 104 of the valve seat 100, and the valve nozzle 810 and the valve seat 100 are connected by welding, the welding process of the valve nozzle 810 and the valve seat 100 can also be implemented simultaneously in the furnace brazing process of step S1, thereby further simplifying the manufacturing process.

[0106] It should be noted that the manufacturing methods of the gate valve shown in the accompanying drawings and described in this specification are merely a few examples of many manufacturing methods that can employ the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or step of the manufacturing methods of the gate valve shown in the accompanying drawings or described in this specification.

[0107] In summary, the manufacturing method of the gate valve proposed in this disclosure utilizes in-furnace brazing to weld the first connecting pipe, the second connecting pipe, and the valve seat. This means that all components of the gate valve requiring welding, except for the limiting retaining ring, are welded simultaneously in a single welding process. After the valve core assembly and other components are installed, a second welding process is used to weld the limiting retaining ring to the valve seat. Through this design, this disclosure reduces the manufacturing steps of the gate valve, simplifies the manufacturing process complexity, and helps improve the production efficiency and reduce production costs.

[0108] The foregoing has described and / or illustrated exemplary embodiments of the shut-off valve and its manufacturing method as disclosed herein. However, the embodiments of this disclosure are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms “a,” “an,” and “the above” are used to indicate the presence of one or more elements / components / etc. The terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to those listed. Furthermore, the terms “first” and “second” in the claims and specification are used only as illustrative marks and are not intended to limit the numerical scope of the object.

[0109] Although the shut-off valve and its manufacturing method have been described according to different specific embodiments, those skilled in the art will recognize that modifications may be made to the implementation of this disclosure within the spirit and scope of the claims.

Claims

1. A stop valve characterized by comprising: include: Valve seat (100), which is provided with a first pipe and a second pipe; A valve core assembly (200) includes a moving valve core (210) and a stationary valve core (220). The stationary valve core (220) is disposed in the valve seat (100) and located between the first pipe and the second pipe. The stationary valve core (220) is provided with a first through hole (2201), which can connect the first pipe and the second pipe. An actuation assembly (300) is partially located inside the valve seat (100) and connected to the movable valve core (210). The actuation assembly (300) includes an actuating element (310), which is at least partially disposed outside the valve seat (100). Along the axial direction of the valve seat (100), the moving valve core (210) is located between the first pipe and the second pipe and is fitted against the stationary valve core (220). By rotating the operating member (310), the operating component (300) drives the moving valve core (210) to rotate relative to the stationary valve core (220). When the moving valve core (210) rotates to block the first through hole (2201), the first pipe and the second pipe are disconnected. When the moving valve core (210) rotates to not block the first through hole (2201), the first pipe and the second pipe are connected.

2. The shut-off valve according to claim 1, characterized in that, The first conduit is disposed at one end of the valve seat (100) in a first direction, and the second conduit is disposed on one side of the valve seat (100) in a second direction perpendicular to the first direction; the moving valve core (210) and the stationary valve core (220) are arranged along the first direction, and the moving valve core (210) is located on the side of the stationary valve core (220) facing away from the first conduit in the first direction; wherein, the valve core assembly (200) is connected to the side of the moving valve core (210) facing away from the stationary valve core (220) in the first direction, and the operating member (310) is disposed at the other end of the valve seat (100) in the first direction.

3. The shut-off valve according to claim 2, characterized in that The valve seat (100) has an opening at the other end in the first direction; the shut-off valve also includes a limiting retaining ring (410), which is fixed to the opening and has a second through hole (4101) extending along the first direction; the operating assembly (300) also includes a connecting rod (320), which extends along the first direction and passes through the second through hole (4101), and the connecting rod (320) connects the operating member (310) and the moving valve core (210).

4. The shut-off valve according to claim 3, characterized in that, The limiting retaining ring (410) and the valve seat (100) are fixedly connected by constant pressure compression welding.

5. The shut-off valve according to claim 3, characterized in that, The connecting rod (320) includes a first part (321) and a second part (322) connected along the first direction. The first part (321) passes through the second through hole (4101) and is connected to the operating member (310). The second part (322) is connected to the moving valve core (210). The second part (322) is located on the side of the limiting ring (410) near the valve core assembly (200). The position of the second part (322) connected to the first part (321) is provided with a limiting surface (3221) facing the limiting ring (410). A sealing gasket (420) is provided between the limiting surface (3221) and the surface of the limiting ring (410) facing the valve core assembly (200).

6. The shut-off valve according to claim 3, characterized in that The connecting rod (320) includes a first part (321) and a second part (322) connected along the first direction. The first part (321) passes through the second through hole (4101) and is connected to the operating member (310). The second part (322) is connected to the moving valve core (210). A first sealing ring (430) is provided between the first part (321) and the hole wall of the second through hole (4101).

7. The shut-off valve according to claim 3, characterized in that The portion of the connecting rod (320) located within the second through hole (4101) is provided with a stop surface (323), and the wall of the second through hole (4101) is provided with a stop protrusion (411) for stopping the connecting rod (320) from continuing to rotate when the connecting rod (320) rotates relative to the limiting ring (410) until the stop surface (323) abuts against the stop protrusion (411). When the stop surface (323) abuts against the stop protrusion (411), the moving valve core (210) blocks the first through hole (2201).

8. The shut-off valve according to claim 7, characterized in that The stationary valve core (220) is provided with two first through holes (2201), which are evenly arranged circumferentially; the connecting rod (320) is provided with two abutment surfaces (323), which face opposite sides in a third direction perpendicular to the first direction; the wall of the second through hole (4101) is provided with two abutment protrusions (411), which circumferentially divide the second through hole (4101); when the two abutment surfaces (323) abut against the two abutment protrusions (411), the moving valve core (210) blocks the two first through holes (2201).

9. The shut-off valve according to claim 7, characterized in that The operating member (310) has a first mounting groove (311) on the side surface facing the connecting rod (320), and the end of the connecting rod (320) away from the valve core assembly (200) extends into the first mounting groove (311); wherein, at least a portion of the groove wall of the first mounting groove (311) matches the shape of the abutment surface (323) to restrict the relative rotation of the connecting rod (320) and the operating member (310).

10. The shut-off valve according to claim 3, characterized in that The limiting ring (410) extends from the opening at one end away from the valve core assembly (200) and has a first limiting protrusion (412) around its periphery; the operating member (310) includes a barrier (312) extending along the first direction and located on the outer periphery of the opening, and a second limiting protrusion (3121) is provided on the inner periphery of the barrier (312); wherein the second limiting protrusion (3121) is located on the side of the first limiting protrusion (412) closer to the valve core assembly (200) to limit the relative position of the operating member (310) and the limiting ring (410) along the first direction.

11. The shut-off valve according to claim 10, characterized in that: The surface (S1) of the first limiting protrusion (412) near the valve core assembly (200) is a plane perpendicular to the first direction, and the surface (S2) of the second limiting protrusion (3121) away from the valve core assembly (200) is a plane perpendicular to the first direction; and / or The surface of the first limiting protrusion (412) away from the valve core assembly (200) is an inclined surface relative to the first direction; and / or The second limiting protrusion (3121) near the surface (S3) of the valve core assembly (200) is an inclined surface that is relatively inclined to the first direction.

12. The shut-off valve according to claim 3, characterized in that The moving valve core (210) has a second mounting groove (211) on the side surface facing away from the stationary valve core (220), and the connecting rod (320) has a connecting arm (324), part of which extends into the second mounting groove (211).

13. The shut-off valve according to claim 12, characterized in that The moving valve core (210) is provided with at least two second assembly slots (211) arranged circumferentially, and the connecting rod (320) is provided with at least two connecting arms (324) arranged circumferentially, with the at least two connecting arms (324) extending into the at least two assembly slots respectively.

14. The shut-off valve according to claim 13, characterized in that The moving valve core (210) includes at least two blocking portions (212) arranged in a petal shape, and at least two second mounting grooves (211) are respectively disposed on at least two of the blocking portions (212), and a conduction gap (2101) is formed between adjacent blocking portions (212); the stationary valve core (220) is provided with at least two first through holes (2201) arranged circumferentially; wherein, when the moving valve core (210) rotates to the point where at least two of the blocking portions (212) respectively block at least two of the first through holes (2201), the first pipe is disconnected from the second pipe, and when the moving valve core (210) rotates to the point where at least two of the conduction gaps (2101) respectively expose at least two of the first through holes (2201), the first pipe is connected to the second pipe.

15. The shut-off valve according to claim 1, characterized in that The operating element (310) is a cap-shaped structure and includes an end plate (313) and a retaining wall (312). The retaining wall (312) is connected to the periphery of the end plate (313) and extends toward the side of the end plate (313) facing the valve core assembly (200); wherein: The outer periphery of the enclosure (312) is provided with friction texture (3122); and / or The outer periphery of the enclosure (312) is provided with at least one operating plane; and / or The outer periphery of the enclosure (312) is provided with a control protrusion (3123).

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