Modularized stop valve convenient to maintain

Abstract

The utility model discloses a modular shut-off valve convenient to maintain, which comprises a valve body and a control module, the valve body is provided with a first mounting hole, a first flow channel and a second flow channel, and the first flow channel and the second flow channel are both communicated with the first mounting hole in the valve body; the control module comprises a valve rod and a stuffing box, the stuffing box is inserted into the first mounting hole and detachably and fixedly connected with the valve body, one end of the stuffing box is fixedly connected with a valve seat, a communicating runner for communicating the first runner with the second runner is arranged in the valve seat, one end of the valve rod penetrates through the stuffing box, and a valve element matched with the valve seat is arranged at one end of the valve rod. The other end of the valve rod is in transmission connection with a driving device. According to the modularized stop valve convenient to maintain, the valve rod, the stuffing box and other components are assembled together to form the control module, the whole control module can be detached from the valve body only by removing the fixing relation between the stuffing box and the valve body during later maintenance, maintenance is more convenient and easier, and the maintenance time can be shortened.

Description

Technical Field

[0001] This utility model relates to the field of shut-off valve technology, and in particular to a modular shut-off valve that is easy to maintain. Background Technology

[0002] Some existing shut-off valves generally include a valve body, valve stem, valve cover, and stuffing box. The valve stem passes through the stuffing box and is inserted into the valve body. The stuffing box is fixed to the valve body by the valve cover. The stuffing box is used to seal between the valve stem and the valve body. A valve core is located at one end of the valve stem inside the valve body, and a drive device is connected to the other end of the valve stem. The drive device drives the valve stem, which in turn drives the valve core to control the flow between the internal channels of the valve body. In the later maintenance of existing shut-off valves, it is necessary to remove the valve cover from the valve body, separate the valve stem from the drive device, and then pull the valve stem out of the valve body, which is inconvenient and slow. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a modular shut-off valve that is easy to maintain. The valve stem, stuffing box, and other components are assembled together to form a control module. During later maintenance, only the fixing relationship between the stuffing box and the valve body needs to be released to remove the entire control module from the valve body, making maintenance more convenient and simpler, and reducing maintenance time.

[0004] A modular shut-off valve for easy maintenance according to an embodiment of the present invention includes a valve body and a control module. The valve body is provided with a first mounting hole, a first flow channel, and a second flow channel. Within the valve body, both the first flow channel and the second flow channel communicate with the first mounting hole. The control module includes a valve stem and a stuffing box. The stuffing box is inserted into the first mounting hole and detachably fixedly connected to the valve body. One end of the stuffing box is fixedly connected to a valve seat that separates the first flow channel from the second flow channel. The valve seat is provided with a connecting flow channel that allows the first flow channel to communicate with the second flow channel. One end of the valve stem passes through the stuffing box. One end of the valve stem is provided with a valve core that cooperates with the valve seat. The other end of the valve stem is drivenly connected to a driving device, or the other end of the valve stem is provided with a manual operating part. The driving device or the manual operating part can drive the valve stem to drive the valve core to control the opening and closing of the first flow channel and the second flow channel.

[0005] The modular shut-off valve according to the present invention, which is easy to maintain, has at least the following beneficial effects: The modular shut-off valve provided by the present invention assembles components such as valve stem and stuffing box together to form a control module. The entire control module can be fixed to the valve body simply by fixing the stuffing box to the valve body. The entire control module can be removed from the valve body simply by releasing the fixing relationship between the stuffing box and the valve body. Therefore, the modular shut-off valve provided by the present invention is convenient and simple to assemble and disassemble the control module. During later maintenance, only the entire control module needs to be disassembled and replaced, which is convenient and simple to maintain and can reduce maintenance time.

[0006] According to some embodiments of the present invention, the valve body is provided with a third flow channel communicating with the first flow channel, and the valve core is capable of controlling the opening and closing of the first flow channel and the third flow channel.

[0007] According to some embodiments of this utility model, in the valve body, the first flow channel is connected to the first mounting hole through a first connecting port, and the third flow channel is connected to the first flow channel through a second connecting port. The first mounting hole, the first connecting port, and the second connecting port are arranged along the axis of the first mounting hole. The first mounting hole is located on the side of the first connecting port away from the second connecting port, and the connecting area between the second flow channel and the first mounting hole is located on the side of the first connecting port away from the second connecting port. The valve seat is inserted into the first connecting port, the connecting flow channel is connected to the first connecting port, and the valve core is located between the first connecting port and the second connecting port. The size of the valve core is less than or equal to the size of the first connecting port. The driving device or the manual operating part can drive the valve stem to move the valve core so that the valve core abuts against the side wall of the valve seat or the second connecting port. When the valve core abuts against the valve seat, the connecting flow channel is disconnected from the first connecting port. When the valve core abuts against the side wall of the second connecting port, the first flow channel is disconnected from the third flow channel.

[0008] According to some embodiments of the present invention, the valve body includes a main body and a connecting member. The first mounting hole is provided at one end of the main body, and the other end of the main body is provided with a second mounting hole. The connecting member is inserted into the second mounting hole and is detachably connected to the valve body. The third flow channel is provided on the connecting member, and the second communication port is located on the connecting member.

[0009] According to some embodiments of the present invention, the control module further includes a valve cover, and the stuffing box is detachably and fixedly connected to the valve body via the valve cover.

[0010] According to some embodiments of the present invention, the first mounting hole has an inlet and outlet for inserting the stuffing box, and the stuffing box is equipped with a first sealing structure for sealing the inlet and outlet.

[0011] According to some embodiments of the present invention, the valve seat is equipped with a second sealing structure, which is used to seal the first communication port.

[0012] According to some embodiments of the present invention, the valve body has an annular positioning step formed at the position between the first communication port and the first mounting hole, and the valve seat has an annular positioning groove on one end face facing the first communication port. The second sealing structure includes a sealing gasket installed in the positioning groove, and the sealing gasket fits against the positioning step and the bottom wall of the positioning groove.

[0013] According to some embodiments of the present invention, a third sealing structure is provided between the valve stem and the stuffing box.

[0014] According to some embodiments of the present invention, the main body is connected to a first pipe connection portion and a second pipe connection portion. The first flow channel extends from the main body to the first pipe connection portion, and the inlet and outlet of the first flow channel are opened at one end face of the first pipe connection portion. The second flow channel extends from the main body to the second pipe connection portion, and the inlet and outlet of the second flow channel are opened at one end face of the second pipe connection portion.

[0015] According to some embodiments of the present invention, the valve body is provided with a plurality of first mounting holes at intervals, the valve body is provided with a plurality of second flow channels at intervals, the second flow channels are connected to the first mounting holes one by one, and the control module is provided with a plurality of modules corresponding to the first mounting holes one by one.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is an external schematic diagram of a modular shut-off valve (with a first pipe connection part and a second pipe connection part, and a pneumatic drive device) that is easy to maintain according to an embodiment of the present utility model.

[0019] Figure 2 for Figure 1A cross-sectional view of a modular shut-off valve for easy maintenance is shown on section AA.

[0020] Figure 3 for Figure 2 An exploded view of a modular shut-off valve that is easy to maintain is shown.

[0021] Figure 4 for Figure 3 Enlarged view of point C in the middle;

[0022] Figure 5 for Figure 2 A schematic diagram of a packing box for a modular shut-off valve that is easy to maintain is shown.

[0023] Figure 6 for Figure 1 A schematic diagram of a modular shut-off valve for easy maintenance is shown in view B.

[0024] Figure 7 This is a schematic diagram of the internal structure of a modular shut-off valve (pneumatically closed by drive device) that is easy to maintain, according to an embodiment of this utility model.

[0025] Figure 8 This is a schematic diagram of a modular shut-off valve (without a first pipe connection and a second pipe connection) that is easy to maintain according to an embodiment of the present utility model.

[0026] Figure 9 This is a schematic diagram of a modular shut-off valve (with multiple control modules installed in one valve body) according to an embodiment of the present invention, which is easy to maintain.

[0027] Figure 10 for Figure 9 The diagram shows the internal structure of a modular shut-off valve that is easy to maintain.

[0028] Figure label:

[0029] Valve body 100, main body 110, first mounting hole 111, inlet and outlet 1111, second mounting hole 112, first flow channel 113, second flow channel 114, first connecting port 115, positioning step 116, first pipe connection part 117, second pipe connection part 118, connector 120, third flow channel 121, second connecting port 122, plug 130, control module 200, valve stem 210, stuffing box 220, valve seat 221, connecting flow channel 2211, positioning groove 2212, pressing part 222, valve core 230, drive device 240, outer shell 241, piston 242, spring 243, valve cover 250, first sealing structure 260, second sealing structure 270, third sealing structure 280. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0034] Some existing shut-off valves generally include a valve body, valve stem, valve cover, and stuffing box. The valve stem passes through the stuffing box and is inserted into the valve body. The stuffing box is fixed to the valve body by the valve cover. The stuffing box is used to seal between the valve stem and the valve body. One end of the valve stem inside the valve body is equipped with a valve core, and the other end of the valve stem is driven by a drive device. The drive device drives the valve stem to move the valve core on the valve stem to control the opening and closing of the flow channels inside the valve body. Existing shut-off valves, such as the three-way shut-off valve provided in patent document CN201920556198.X, require the valve cover to be removed from the valve body, the valve stem to be separated from the drive device, and the valve stem to be pulled out from the side of the valve body away from the drive device before the valve core on the valve stem can be maintained. Maintenance is inconvenient and slow, takes a long time, and is difficult for a single person to complete.

[0035] Reference Figures 1 to 3 , Figure 5A modular shut-off valve for easy maintenance according to an embodiment of the present invention includes a valve body 100 and a control module 200. The valve body 100 is provided with a first mounting hole 111, a first flow channel 113, and a second flow channel 114. Within the valve body 100, both the first flow channel 113 and the second flow channel 114 communicate with the first mounting hole 111. The control module 200 includes a valve stem 210 and a packing box 220. The packing box 220 is inserted into the first mounting hole 111 and detachably fixedly connected to the valve body 100. One end of the packing box 220 is provided with a valve seat 221 that separates the first flow channel 113 from the second flow channel 114. The valve seat 221 is provided with a connecting flow channel 2211 for connecting the first flow channel 113 and the second flow channel 114. One end of the valve stem 210 passes through the stuffing box 220. One end of the valve stem 210 is provided with a valve core 230 that cooperates with the valve seat 221. The other end of the valve stem 210 is connected to a drive device 240. The drive device 240 can drive the valve stem 210 to drive the valve core 230 to control the opening and closing between the first flow channel 113 and the second flow channel 114. The drive device 240 can be fixedly connected to the stuffing box 220 or can be detachably installed on other objects outside the modular shut-off valve.

[0036] In the specific implementation process, the valve seat 221 can be integrally formed on the stuffing box 220. Of course, the valve seat 221 and the stuffing box 220 can also be formed separately and then fixedly connected together by welding, screwing or other methods, so that the valve seat 221 and the stuffing box 220 form an integral structure.

[0037] It should be noted that in some other embodiments, the other end of the valve stem 210 may also be provided with a manual operation part to replace the drive device 240 described above. The manual operation part can drive the valve stem 210 to drive the valve core 230 to control the opening and closing between the first flow channel 113 and the second flow channel 114.

[0038] The modular shut-off valve provided by this utility model assembles components such as the valve stem 210 and the packing box 220 together to form a control module 200. The entire control module 200 is fixed to the valve body 100 simply by fixing the packing box 220 to it. The entire control module 200 can be removed from the valve body 100 simply by releasing the fixing relationship between the packing box 220 and the valve body 100. Therefore, the modular shut-off valve provided by this utility model is convenient and simple to assemble and disassemble. During later maintenance, only the entire control module 200 needs to be disassembled and replaced, eliminating the need to disassemble and assemble other components such as the valve stem 210 and the drive device 240. Maintenance is convenient and simple, reducing maintenance time. Furthermore, the replaced old control module 200 can be repaired at another location and at another time for the valve core 230 and other sub-components on the valve stem 210, allowing the old control module 200 to be put back into use.

[0039] It is conceivable that for fluid piping systems using this modular shut-off valve, the downtime of the fluid piping system will be less when maintaining the modular shut-off valve, reducing the losses caused by downtime during maintenance. For example, in hot water supply fluid piping systems, because of the shorter maintenance time, there is less heat loss in the fluid piping system, and the fluid piping system can resume operation more quickly, reducing the loss of production capacity, thereby reducing maintenance costs.

[0040] It is conceivable that during maintenance, the valve body 100 can be left on the fluid flow path without being disassembled. In this case, the valve body 100 is fixed on the fluid flow path. When disassembling the control module 200, no additional measures are required for the staff to fix the valve body 100. The entire control module 200 can be removed simply by disconnecting the fixed connection between the packing box 220 and the valve body 100. When reinstalling the control module 200, it is only necessary to insert the packing box 220 into the first mounting hole 111 and then fix the packing box 220 to the valve body 100. No additional measures are required to fix the valve body 100. Thus, during the entire maintenance process, only one staff member is needed to complete the disassembly and replacement of the control module 200, making maintenance more convenient and faster, saving manpower, and reducing maintenance costs.

[0041] In addition, it is convenient to make the modular shut-off valve provided by this utility model into a single-station form with one valve body 100 and one control module 200 installed, or a multi-station form with two or more control modules 200 installed on one valve body 100, depending on actual needs. Each control module 200 can be removed from the valve body 100 individually.

[0042] The modular shut-off valve provided by this utility model controls the opening and closing between the first flow channel 113 and the second flow channel 114 through the cooperation between the valve seat 221 and the valve core 230 on the valve stem 210. The valve seat 221 is connected to the packing box 220 as a whole. Thus, the valve seat 221 can be positioned by the cooperation between the packing box 220 and the inner wall of the first mounting hole 111. The valve seat 221 can be installed more accurately and stably in the first mounting hole 111, so that the valve stem 210 moves more stably when the drive device 240 or the manual operation unit drives the valve stem 210. It can also detect and observe whether the valve core 230 and the valve seat 221 are tightly fitted before the control module 200 is installed in the valve body 100.

[0043] Reference Figure 2 In some embodiments, the valve body 100 can be made into a three-way form. Specifically, the valve body 100 is provided with a third flow channel 121 that communicates with the first flow channel 113, and the valve core 230 can control the opening and closing between the first flow channel 113 and the third flow channel 121.

[0044] The modular shut-off valve provided by this utility model can also be made into a double-pass form, that is, only the first flow channel 113 and the second flow channel 114 mentioned above can be provided in the valve body 100.

[0045] Of course, it is conceivable that, referring to Figure 10 The modular shut-off valve provided by this utility model can have a first flow channel 113, a second flow channel 114 and a third flow channel 121 opened in the valve body 100. Then, according to actual needs, one of the flow channels can be blocked, so that the three-way valve body 100 can be used as a two-way valve body 100.

[0046] Reference Figure 2 , Figure 3 and Figure 7 Specifically, according to some embodiments of the present invention, within the valve body 100, the first flow channel 113 is connected to the first mounting hole 111 via the first connecting port 115, and the third flow channel 121 is connected to the first flow channel 113 via the second connecting port 122. The first mounting hole 111, the first connecting port 115, and the second connecting port 122 are arranged along the axis of the first mounting hole 111. The first mounting hole 111 is located on the side of the first connecting port 115 away from the second connecting port 122. The connecting area between the second flow channel 114 and the first mounting hole 111 is located on the side of the first connecting port 115 away from the second connecting port 122. The valve seat 221 is inserted into the first... A connecting port 115 is connected to a connecting channel 2211. A valve core 230 is located between the first connecting port 115 and the second connecting port 122. The size of the valve core 230 is less than or equal to the size of the first connecting port 115. A driving device 240 or a manual operating unit can drive the valve stem 210 to move the valve core 230 so that the valve core 230 abuts against the valve seat 221 or the side wall of the second connecting port 122. When the valve core 230 abuts against the valve seat 221, the connecting channel 2211 is disconnected from the first connecting port 115. When the valve core 230 abuts against the side wall of the second connecting port 122, the first channel 113 is disconnected from the third channel 121. With the above configuration, when the valve body 100 is configured as a three-way valve, the opening and closing between the first flow channel 113 and the second flow channel 114 and the third flow channel 121 can be controlled simply by the valve core 230. At the same time, compared with the existing three-way shut-off valve, the modular shut-off valve provided in this application only requires the overall disassembly and assembly of the control module 200 for later maintenance, eliminating the process of separating the valve stem 210 from the drive device 240 and then pulling out the valve stem 210 from the side of the valve body 100 away from the drive device 240.

[0047] Reference Figure 2 and Figure 3According to some embodiments of this utility model, the valve body 100 includes a main body 110 and a connector 120. A first mounting hole 111 is provided at one end of the main body 110, and a second mounting hole 112 is provided at the other end of the main body 110. The connector 120 is inserted into the second mounting hole 112 and detachably connected to the valve body 100. A third flow channel 121 is provided on the connector 120, and a second communication port 122 is located on the connector 120. Therefore, when the valve core 230 abuts against the connector 120, the first flow channel 113 is disconnected from the third flow channel 121. The connector 120 can be used to connect to a pipe in a fluid pipeline system to connect the third flow channel 121 into the fluid pipeline system. With the above configuration, the modular shut-off valve provided by this utility model uses the valve core 230, valve seat 221, and connector 120 to control the flow path opening and closing. The structure controlling the flow path opening and closing can be disassembled and replaced from the main body 110 of the valve body 100 after wear, without replacing the main body 110 of the valve body 100, reducing maintenance costs and making maintenance convenient and simple.

[0048] In practice, the connector 120 can be screwed into the second mounting hole 112, or the connector 120 can be detachably fixed to the main body 110 by bolts.

[0049] It is conceivable that in some other embodiments, the valve core 230 on the valve stem 210 can be configured as a ball valve that controls the opening and closing of the flow channel by rotation. Specifically, the valve stem 210 is rotatably inserted through the stuffing box 220, the valve core 230 is spherical, and the valve core 230 is provided with a switching groove. The valve core 230 is rotatably installed in the connecting flow channel 2211 in the valve seat 221. Thus, when the driving device 240 drives the valve stem 210 to rotate the valve core 230, the switching flow channel can be rotated so that the switching groove connects the first flow channel 113 to the second flow channel 114 or the third flow channel 121.

[0050] In the specific implementation process, the specific paths of the first flow channel 113 and the second flow channel 114 mentioned above can be designed according to actual needs, for example, referring to Figure 2 The path of the first flow channel 113 can be set to be curved, as shown in the reference. Figure 8 The path of the first flow channel 113 can also be set in a straight line.

[0051] Reference Figures 2 to 4 According to some embodiments of the present invention, the control module 200 further includes a valve cover 250, a stuffing box 220 is installed on the valve cover 250, and the stuffing box 220 is detachably fixedly connected to the valve body 100 through the valve cover 250.

[0052] Reference Figure 2 and Figure 4In the specific implementation process, the valve cover 250 is fitted onto the packing box 220. The valve cover 250 and the packing box 220 are detachable. The packing box 220 has a pressing part 222 on its outer periphery, which is located between the valve body 100 and the valve cover 250. The valve cover 250 can be fixed to the valve body 100 by bolts or by internal thread. In this case, the valve cover 250 abuts against the pressing part 222, thereby pressing and fixing the packing box 220 in the first mounting hole 111. When disassembling the control module 200, the fixed connection between the valve cover 250 and the valve body 100 is first released. Then, the packing box 220 and the valve stem 210 are pulled out from the first mounting hole 111. Under the restriction of the pressing part 222, the valve cover 250 cannot detach from the packing box 220, thereby realizing the overall disassembly of the control module 200 from the valve body 100.

[0053] In other embodiments, the valve cover 250 may also be configured in other ways. For example, the valve cover 250 may be integrally formed with the stuffing box 220, and the valve cover 250 may be fixedly connected to the valve body 100 by bolts.

[0054] Reference Figure 2 and Figure 7 According to some embodiments of the present invention, the driving device 240 can be configured as a cylinder. Specifically, the driving device 240 includes a housing 241, a piston 242 and a spring 243. The housing 241 is connected to the valve cover 250, the piston 242 is disposed inside the housing 241, the valve stem 210 is inserted into the housing 241 and connected to the piston 242, and a return spring 243 is disposed between the piston 242 and the housing 241. Thus, the driving device 240 is a cylinder. When the return spring 243 is positioned on the side of the piston 242 near the valve body 100, the piston 242 pushes the valve stem 210 towards the valve body 100 when the drive device 240 is working, causing the valve core 230 to leave the valve seat 221, thus connecting the first flow channel 113 and the second flow channel 114. In other words, the working mode of the drive device 240 is air-open, and the first flow channel 113 and the second flow channel 114 are normally closed. When the return spring 243 is positioned on the side of the piston 242 away from the valve body 100, the piston 242 drives the valve stem 210 to slide towards the piston 242 when the drive device 240 is working, causing the valve core 230 to move from the second communication port 122 towards the valve seat 221, thus disconnecting the first flow channel 113 and the second flow channel 114. In other words, the working mode of the cylinder is air-closed, and the first flow channel 113 and the second flow channel 114 are normally open.

[0055] It should be noted that the drive device 240 described above can also be configured in other ways. For example, the drive device 240 can be configured as a linear motor or an electromagnetic drive device.

[0056] According to some embodiments of the present invention, the first mounting hole 111 has an inlet and outlet 1111 for inserting the stuffing box 220, and the stuffing box 220 is equipped with a first sealing structure 260, which is used to seal at the inlet and outlet 1111.

[0057] Reference Figure 2 and Figure 4 According to some embodiments of the present invention, the valve seat 221 is equipped with a second sealing structure 270, which is used to seal the first communication port 115.

[0058] Reference Figure 2 and Figure 4 According to some embodiments of this utility model, the valve body 100 has an annular positioning step 116 formed between the first connecting port 115 and the first mounting hole 111. The valve seat 221 has an annular positioning groove 2212 on one end face facing the first connecting port 115. The second sealing structure 270 includes a sealing gasket installed in the positioning groove 2212. The sealing gasket fits against the positioning step 116 and the bottom wall of the positioning groove 2212, thereby forming an effective seal between the valve seat 221 and the valve body 100. At the same time, the assembly precision between the valve seat 221 and the valve body 100 is higher. Since the sealing gasket is fixedly installed in the positioning groove 2212, when the control module 200 is removed from the valve body 100, the sealing gasket can simultaneously leave the valve body 100 along with the valve seat 221.

[0059] It is conceivable that the second sealing structure 270 described above can also be configured in other ways. For example, the second sealing structure 270 includes an elastic sealing ring, which is sleeved on the outer periphery of the valve seat 221 and abuts against the side wall of the first communication port 115.

[0060] Reference Figure 2 and Figure 4 According to some embodiments of the present invention, a third sealing structure 280 is provided between the valve stem 210 and the stuffing box 220, and a follow-up seal is formed between the valve stem 210 and the stuffing box 220 through the third sealing structure 280.

[0061] It should be noted that the first sealing structure 260 can be configured in a similar manner to the second sealing structure 270. When the control module 200 is removed from the valve body 100, the first sealing structure 260 can leave the valve body 100 along with the stuffing box 220. The third sealing structure 280 is a mature technology in this field and is not limited here.

[0062] Reference Figure 1 , Figure 2 and Figure 6According to some embodiments of this utility model, the main body 110 is connected to a first pipe connection portion 117 and a second pipe connection portion 118. A first flow channel 113 extends from the main body 110 to the first pipe connection portion 117, and the inlet and outlet of the first flow channel 113 are located at one end face of the first pipe connection portion 117. A second flow channel 114 extends from the main body 110 to the second pipe connection portion 118, and the inlet and outlet of the second flow channel 114 are located at one end face of the second pipe connection portion 118. Thus, the valve body 100 can be connected to the fluid pipeline system via the first pipe connection portion 117 and the second pipe connection portion 118, allowing the first flow channel 113 and the second flow channel 114 to be connected to the fluid pipeline system, facilitating the installation of the modular shut-off valve in the fluid pipeline system.

[0063] Reference Figure 1 and Figure 6 In specific implementation, the first pipe connection part 117 and the second pipe connection part 118 can be set as flange connection plates.

[0064] It is conceivable that the first pipe connection 117 and the second pipe connection 118 described above can also be configured in other ways. For example, the first pipe connection 117 and the second pipe connection 118 can also be configured as components similar to the connector 120 described above.

[0065] It should be noted that, referring to Figure 8 In some other embodiments, the first pipe connection 117 and the second pipe connection 118 may not be provided, and the pipes of the fluid pipeline system may be inserted into the first flow channel 113 or the second flow channel 114.

[0066] Reference Figure 9 and Figure 10 The modular shut-off valve provided by this utility model can be easily configured into a multi-station form in which one valve body 100 is equipped with two or more control modules 200.

[0067] According to some embodiments of the present invention, the valve body 100 is provided with a plurality of first mounting holes 111 at intervals, and the valve body 100 is provided with a plurality of second flow channels 114 at intervals. The second flow channels 114 are connected to the first mounting holes 111 one by one. The control module 200 is provided with a plurality of first mounting holes 111 one by one. The main body 110 of the valve body 100 may also be provided with a plurality of the above-mentioned second mounting holes 112. The second mounting holes 112 that require external pipes can be used to install the above-mentioned connectors 120. The second mounting holes 112 that do not require external pipes can be used to install plugs 130 to close the second mounting holes 112. Therefore, by modifying the valve body 100 into a valve body 100 with multiple first mounting holes 111 and multiple second flow channels 114, and then installing control modules 200 in each of the first mounting holes 111, the modular shut-off valve can be configured into a multi-position form with two or more control modules 200 installed on one valve body 100. At this time, the modular shut-off valve is equivalent to multiple two-way or three-way single valve shut-off valves connected in parallel, which can simultaneously connect to more fluid pipeline systems. Moreover, the entire modular shut-off valve is easy to install and maintain, and the modular shut-off valve has a compact structure and small size.

[0068] In this utility model, the dual-position modular shut-off valve, the three-position modular shut-off valve, and the multi-position modular shut-off valve can all use the same control module 200, forming a standardization, which is more conducive to the disassembly, assembly, and maintenance of various shut-off valves in the fluid pipeline system.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A modular shut-off valve that is easy to maintain, characterized in that, include: The valve body (100) is provided with a first mounting hole (111), a first flow channel (113) and a second flow channel (114). In the valve body (100), the first flow channel (113) and the second flow channel (114) are both connected to the first mounting hole (111). The control module (200) includes a valve stem (210) and a stuffing box (220). The stuffing box (220) is inserted into the first mounting hole (111) and is detachably fixedly connected to the valve body (100). The stuffing box (220) is fixedly connected to a valve seat (221) that separates the first flow channel (113) from the second flow channel (114). The valve seat (221) is provided with a connecting flow channel (2211) that connects the first flow channel (113) and the second flow channel (114). The valve stem ( One end of the valve stem (210) is inserted into the packing box (220). One end of the valve stem (210) is provided with a valve core (230) that cooperates with the valve seat (221). The other end of the valve stem (210) is connected to a drive device (240), or the other end of the valve stem (210) is provided with a manual operation part. The drive device (240) or the manual operation part can drive the valve stem (210) to drive the valve core (230) to control the opening and closing between the first flow channel (113) and the second flow channel (114).

2. The modular shut-off valve for easy maintenance according to claim 1, characterized in that, The valve body (100) is provided with a third flow channel (121) that communicates with the first flow channel (113), and the valve core (230) can control the opening and closing of the first flow channel (113) and the third flow channel (121).

3. The modular shut-off valve for easy maintenance according to claim 2, characterized in that, Within the valve body (100), the first flow channel (113) communicates with the first mounting hole (111) through a first connecting port (115), and the third flow channel (121) communicates with the first flow channel (113) through a second connecting port (122). The first mounting hole (111), the first connecting port (115), and the second connecting port (122) are arranged along the axis of the first mounting hole (111). The first mounting hole (111) is located on the side of the first connecting port (115) away from the second connecting port (122). The communication area between the second flow channel (114) and the first mounting hole (111) is located on the side of the first connecting port (115) away from the second connecting port (122). The valve seat (221) is inserted into the first connecting port (115), and the communicating flow channel... (2211) is connected to the first communication port (115). The valve core (230) is located between the first communication port (115) and the second communication port (122). The size of the valve core (230) is less than or equal to the size of the first communication port (115). The driving device (240) or the manual operation unit can drive the valve stem (210) to move the valve core (230) so that the valve core (230) abuts against the valve seat (221) or the side wall of the second communication port (122). When the valve core (230) abuts against the valve seat (221), the communication channel (2211) is disconnected from the first communication port (115). When the valve core (230) abuts against the side wall of the second communication port (122), the first flow channel (113) is disconnected from the third flow channel (121).

4. The modular shut-off valve for easy maintenance according to claim 3, characterized in that, The valve body (100) includes a main body (110) and a connector (120). The first mounting hole (111) is provided at one end of the main body (110), and the other end of the main body (110) is provided with a second mounting hole (112). The connector (120) is inserted into the second mounting hole (112) and is detachably connected to the valve body (100). The third flow channel (121) is provided on the connector (120), and the second communication port (122) is located on the connector (120).

5. A modular shut-off valve for easy maintenance according to claim 1, characterized in that, The control module (200) also includes a valve cover (250), and the stuffing box (220) is detachably fixed to the valve body (100) via the valve cover (250).

6. The modular shut-off valve for easy maintenance according to claim 1, characterized in that, The first mounting hole (111) has an inlet and outlet (1111) for inserting the stuffing box (220), the stuffing box (220) is equipped with a first sealing structure (260) for sealing the inlet and outlet.

7. A modular shut-off valve for easy maintenance according to claim 3, characterized in that, The valve seat (221) is equipped with a second sealing structure (270) for sealing the first communication port (115).

8. A modular shut-off valve for easy maintenance according to claim 7, characterized in that, The valve body (100) has an annular positioning step (116) formed between the first communication port (115) and the first mounting hole (111). The valve seat (221) has an annular positioning groove (2212) on one end face facing the first communication port (115). The second sealing structure (270) includes a sealing gasket installed in the positioning groove (2212). The sealing gasket fits against the positioning step (116) and the bottom wall of the positioning groove (2212).

9. A modular shut-off valve for easy maintenance according to claim 4, characterized in that, The main body (110) is connected to a first pipe connection part (117) and a second pipe connection part (118). The first flow channel (113) extends from the main body (110) to the first pipe connection part (117). The inlet and outlet of the first flow channel (113) are opened at one end face of the first pipe connection part (117). The second flow channel (114) extends from the main body (110) to the second pipe connection part (118). The inlet and outlet of the second flow channel (114) are opened at one end face of the second pipe connection part (118).

10. A modular shut-off valve for easy maintenance according to any one of claims 1 to 9, characterized in that, The valve body (100) is provided with a plurality of first mounting holes (111) at intervals, and the valve body (100) is provided with a plurality of second flow channels (114) at intervals. The second flow channels (114) are connected to the first mounting holes (111) one by one. The control module (200) is provided with a plurality of modules, which are one by one corresponding to the first mounting holes (111).

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