A multi-way plug valve

Abstract

The present application relates to the field of plug valves, and in particular to a multi-way plug valve, which includes a valve body and a connecting pipe, wherein the valve body is provided with a valve cavity, the outer wall of the valve body is provided with an installation port, the installation port is connected to the valve cavity, the connecting pipe is coaxially fixedly connected to the inner wall of the installation port, and the valve body is formed by a die forging process. The plug valve is divided into two parts, the valve body and the connecting pipe, which are manufactured separately and then assembled, so as to reduce the problem of low yield rate caused by one-piece casting. The valve body can be formed by a die forging process. Compared with casting, die forging can provide higher material density and mechanical properties, reduce defects inside the material, ensure that the valve body has stronger pressure resistance and longer service life, improve the overall quality and reliability of the valve body, and improve the yield rate of the plug valve.

Description

Technical Field

[0001] The present application relates to the field of plug valves, and in particular to a multi-way plug valve. Background Art

[0002] A plug valve is a fast-opening straight-through valve that can be opened or closed by rotating the valve plug to connect or separate the channel opening on the valve body. The shape of the valve plug can be cylindrical or conical. The working principle of the plug valve is to change the size and direction of the valve core channel by rotating the valve core, thereby regulating and cutting off the fluid.

[0003] Plug valves are easy to adapt to multi-channel structures. One valve can obtain two, three or even four different flow channels, thereby simplifying the design of the piping system, reducing the number of valves and some connecting accessories required in the equipment.

[0004] The traditional high-pressure large-diameter multi-way valve body relies on casting, which often leads to relatively single product specifications, and the quality of the finished product is highly dependent on the maturity and stability of the casting technology, thus affecting the yield rate of the plug valve. Summary of the invention

[0005] In order to improve the yield rate, the present application provides a multi-way plug valve.

[0006] The multi-way plug valve provided in this application adopts the following technical solution:

[0007] A multi-way plug valve comprises a valve body and a connecting pipe, wherein the valve body is provided with a valve cavity, an outer wall of the valve body is provided with an installation port, the installation port is connected to the valve cavity, the connecting pipe is coaxially fixedly connected to the inner wall of the installation port, and the valve body is formed by a die forging process.

[0008] By adopting the above technical solution, the plug valve is divided into two parts, the valve body and the connecting pipe, which are manufactured separately and then assembled, thereby reducing the problem of low yield rate caused by one-piece casting. The valve body can be formed by die forging. Compared with casting, die forging can provide higher material density and mechanical properties, reduce internal defects of the material, ensure that the valve body has stronger pressure resistance and longer service life, improve the overall quality and reliability of the valve body, and improve the yield rate of the plug valve.

[0009] Preferably, the connecting pipe comprises a fixed pipe and a connecting pipe, the fixed pipe is coaxially fixedly connected to the inner wall of the installation port, and the connecting pipe is coaxially fixedly connected to an end of the fixed pipe away from the valve body.

[0010] By adopting the above technical solution, the fixed pipe can be fixedly installed on the inner wall of the installation port from the inside of the valve cavity, and then the connecting pipe and the fixed pipe can be relatively fixed, thereby improving the reliability of assembly and the yield rate of the plug valve. Different connecting pipes can also be assembled according to needs, thereby improving the market adaptability and competitiveness of the product.

[0011] Preferably, a step ring is coaxially fixedly connected to the outer wall of the fixed tube, and a mounting ring groove is coaxially provided on the inner wall of the mounting port. The mounting ring groove extends toward one end close to the valve cavity, and the mounting ring groove is used for the step ring to be embedded. The step ring abuts against the groove wall of the mounting ring groove facing the valve cavity.

[0012] By adopting the above technical solution, when the fixed pipe is installed in the valve cavity, the step ring is positioned and embedded in the ring groove, which can prevent the fixed pipe from falling off the valve body, improve the bearing capacity of the fixed pipe mouth, ensure the high strength and sealing of the connection part, and significantly reduce the amount of welding work, thereby reducing costs and reducing the risk of material performance degradation due to welding heat, further improving the overall quality of the product and improving the yield rate of the plug valve.

[0013] Preferably, a first abutment surface is provided at one end of the fixed tube facing away from the valve body, and the distance from the first abutment surface to the step ring decreases as it moves away from the axis of the fixed tube; a second abutment surface is provided at one end of the connecting tube facing the fixed tube, and the distance from the second abutment surface to the step ring increases as it moves away from the axis of the connecting tube; the fixed tube and the connecting tube are welded and fixed.

[0014] By adopting the above technical solution, the first abutting surface and the second abutting surface facilitate welding of the fixed pipe and the connecting pipe, thereby improving the structural strength of the fixed pipe and the connecting pipe and improving the yield rate of the plug valve.

[0015] Preferably, it also includes a valve stem and a connecting pipe, the valve body is coaxially provided with an assembly port and a discharge port, the assembly port and the discharge port are both connected to the valve cavity, the valve stem is coaxially rotatably connected to the inner walls of the assembly port and the discharge port, the end of the valve stem away from the assembly port is coaxially provided with a connecting groove, the connecting groove is connected to the discharge port, a plurality of installation ports are provided, and the plurality of installation ports are spaced around the axis of the valve body, a connecting port is provided on the outer wall of the valve stem, the connecting port is connected to the connecting groove, one end of the connecting pipe is coaxially fixedly connected to the inner wall of the connecting port, and the other end of the connecting pipe is connected to the installation port.

[0016] By adopting the above technical solution, the valve stem rotates to control the connecting pipe to be connected with different installation ports, which is convenient for controlling the conveying of different materials, reducing the use of accessories and improving the conveying efficiency.

[0017] Preferably, it also includes a flow ring, which is coaxially fixedly connected to the inner wall of the valve cavity, and the outer wall of the flow ring is provided with a flow groove, and there are multiple flow grooves, and the flow grooves are connected with the installation port in a one-to-one manner; the flow ring is provided with a feed port at one end facing the connecting pipe, and there are multiple feed ports, and the feed ports are connected with the flow grooves in a one-to-one manner; and the end of the connecting pipe away from the valve stem is connected to the feed port.

[0018] By adopting the above technical solution, the flow channel ring meets different fluid control requirements and improves the flexibility and efficiency of valve stem connection by optimizing the flow channel layout.

[0019] Preferably, it further comprises a sealing member, wherein the sealing member comprises a sealing ring, the sealing ring is slidably connected to the inner wall of the connecting pipe, and the sealing ring abuts against the flow channel ring toward the outer wall of the connecting pipe.

[0020] By adopting the above technical solution, a practical sealing ring is used to forcefully seal the gap between the connecting pipe and the flow channel ring, thereby reducing the probability of other external liquids entering the connecting pipe and ensuring that the liquid flowing out of the installation port flows into the connecting pipe, solving the problem of loose sealing caused by wear or assembly tolerance, and improving the adaptability and service life of the valve stem.

[0021] Preferably, the seal also includes an elastic sheet, and a placement ring groove is coaxially provided on the inner wall of the connecting tube, and the placement ring groove extends toward the flow channel ring to pass through the connecting tube, one end of the elastic sheet abuts against the groove wall of the placement ring groove toward the flow channel ring, and the other end of the elastic sheet abuts against the sealing ring.

[0022] By adopting the above technical solution, the elastic sheet can adjust the position of the sealing ring according to actual needs to ensure the best sealing effect and maintain good sealing performance even under harsh working conditions such as high pressure or high temperature.

[0023] Preferably, it also includes a connecting rib, a fixing plate and a fastener, one end of the connecting rib is fixedly connected to the end of the fixing tube away from the connecting tube, the other end of the connecting rib is fixedly connected to the fixing plate, the fixing plate is coaxially provided with a fixing port, the inner wall of the flow channel ring is provided with a locking port, the locking port is connected to the flow channel groove, the fastener is coaxially rotatably connected to the inner wall of the locking port, and the fastener is threadedly connected to the inner wall of the fixing port.

[0024] By adopting the above technical solution, the fasteners relatively fix the fixing plate and the flow channel ring, thereby fixing the fixed pipe, facilitating the installation of the fixed pipe and improving the installation efficiency.

[0025] Preferably, the fastener includes a fastening column, an anti-leakage ring and a locking ring, the fastening column is coaxially rotatably connected to the inner wall of the locking port, the fastening column is threadedly connected to the inner wall of the fixing port, the anti-leakage ring is sleeved on the outer periphery of the fastening column, the anti-leakage ring abuts the inner wall of the fixing port, the locking ring is threadedly connected to the outer wall of the fastening column, and the locking ring abuts the inner wall of the flow channel ring.

[0026] By adopting the above technical solution, the leak-proof ring reduces the probability of liquid flowing along the fixed port, ensures that the liquid enters the connecting pipe, and reduces resource waste.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The plug valve is divided into two parts, the valve body and the pipe, which are manufactured separately and then assembled to reduce the problem of low yield rate caused by one-piece casting. The valve body can be formed by die forging. Compared with casting, die forging can provide higher material density and mechanical properties, reduce internal defects of the material, ensure that the valve body has stronger pressure resistance and longer service life, improve the overall quality and reliability of the valve body, and improve the yield rate of the plug valve;

[0029] 2. When the fixed pipe is installed from the valve cavity, the step ring is positioned and embedded in the ring groove, which can prevent the fixed pipe from coming off the valve body, improve the bearing capacity of the fixed pipe mouth, ensure the high strength and sealing of the connection part, and significantly reduce the amount of welding work, thereby reducing costs and reducing the risk of material performance degradation due to welding heat, further improving the overall quality of the product and improving the yield rate of the plug valve;

[0030] 3. The practical sealing ring forces the gap between the connecting pipe and the flow channel ring to seal, reducing the probability of other external liquids entering the connecting pipe, ensuring that the liquid flowing out of the installation port flows into the connecting pipe, solving the problem of loose sealing caused by wear or assembly tolerance, and improving the adaptability and service life of the valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of a multi-way plug valve.

[0032] Figure 2 It is a cross-sectional view of a multi-way plug valve.

[0033] Figure 3 It is a cross-sectional view of a multi-way plug valve, mainly used to show the fixed components.

[0034] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0035] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0036] Figure 6 It is a cross-sectional view of a multi-way plug valve, mainly used to show the valve stem, flow channel ring and connecting pipe.

[0037] Figure 7 yes Figure 6 Enlarged view of point C in the middle.

[0038] Figure 8 It is a schematic diagram of the overall structure of a multi-way plug valve, mainly used to show the valve seat and the cleaning pipe.

[0039] Explanation of reference numerals: 1. valve body; 11. support frame; 12. valve seat; 121. valve chamber; 1211. abutment ring; 122. assembly port; 123. discharge port; 124. installation port; 1241. installation ring groove; 125. cleaning port; 13. valve cover; 131. assembly block; 132. assembly port; 2. valve stem; 21. connecting ring groove; 22. connecting groove; 23. connecting port; 3. sealing ring; 4. flow channel ring; 41. flow channel groove; 42. feed port; 43. locking port ; 5. Connecting pipe; 51. Fixing pipe; 511. Step ring; 512. First abutting surface; 52. Connecting pipe; 521. Second abutting surface; 6. Fixing assembly; 61. Connecting rib; 62. Fixing plate; 621. Fixing port; 63. Fastener; 631. Fastening column; 6311. Sealing ring groove; 632. Leak-proof ring; 633. Locking ring; 7. Connecting pipe; 71. Placement ring groove; 8. Seal; 81. Sealing ring; 82. Elastic sheet; 91. Cleaning pipe; 92. Baffle. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-8 This application is described in further detail.

[0041] The present application embodiment discloses a multi-way plug valve. Figure 1 and Figure 2 A multi-way plug valve includes a valve body 1, a valve stem 2, a sealing ring 3, a flow channel ring 4, a connecting pipe 5, a fixing component 6, a connecting pipe 7, a sealing member 8 and a cleaning pipe 91.

[0042] Reference Figure 2The valve body 1 includes a support frame 11, a valve seat 12 and a valve cover 13. The support frame 11 is fixedly connected to one end of the valve seat 12. The valve seat 12 is coaxially provided with a valve cavity 121. The end of the valve seat 12 away from the support frame 11 is coaxially provided with an assembly port 122, and the assembly port 122 is connected to the valve cavity 121. An assembly block 131 is coaxially fixedly connected to one side of the valve cover 13. The diameter of the assembly block 131 is smaller than the diameter of the valve cover 13. The assembly port 122 is used for the assembly block 131 to be embedded. The diameter of the assembly block 131 is equal to the diameter of the assembly port 122. The end of the valve seat 12 away from the support frame 11 abuts against the valve cover 13. The valve seat 12 and the valve cover 13 are fixedly connected by bolts. The valve seat 12 and the valve cover 13 are both formed by die forging.

[0043] The valve cover 13 is coaxially provided with an assembly port 132, and the end of the valve seat 12 facing away from the valve cover 13 is coaxially provided with a discharge port 123. The assembly port 132 and the discharge port 123 are both connected to the valve cavity 121. The valve stem 2 is coaxially rotatably connected to the inner walls of the assembly port 132 and the discharge port 123. The outer wall of the valve stem 2 is coaxially provided with a connecting ring groove 21. There are multiple connecting ring grooves 21, and the multiple connecting ring grooves 21 are respectively arranged at both ends of the valve stem 2. There are multiple sealing rings 3, and the sealing rings 3 are arranged one by one with the connecting ring grooves 21. The sealing ring 3 is embedded in the connecting ring groove 21, and the outer wall of the sealing ring 3 abuts against the inner wall of the assembly port 132 or the inner wall of the discharge port 123.

[0044] Reference Figure 2 The outer wall of the valve seat 12 is provided with a mounting port 124, which is provided on the side of the valve cover 13 close to the discharge port 123, and is connected to the valve cavity 121. There are multiple mounting ports 124, and the multiple mounting ports 124 are evenly spaced around the axis of the valve seat 12. The inner wall of the valve cavity 121 is coaxially fixedly connected with an abutment ring 1211, which is provided on the side of the mounting port 124 away from the valve cover 13. The flow channel ring 4 is sleeved on the outer periphery of the valve stem 2, one side of the flow channel ring 4 abuts against the abutment ring 1211, and the other side of the flow channel ring 4 abuts against the assembly block 131. The outer wall of the flow channel ring 4 abuts against the inner wall of the valve cavity 121, so as to fix the flow channel ring 4.

[0045] Reference Figure 2 and Figure 3 The outer wall of the flow channel ring 4 is provided with a flow channel groove 41, and there are multiple flow channel grooves 41. The flow channel grooves 41 are connected with the installation port 124 in a one-to-one manner. The end of the flow channel ring 4 away from the valve cover 13 is provided with a feed port 42, and there are multiple feed ports 42. The feed ports 42 are connected with the flow channel grooves 41 in a one-to-one manner. The feed port 42 is arranged on the inner periphery of the abutment ring 1211.

[0046] Reference Figure 2 and Figure 4The connecting pipe 5 includes a fixed pipe 51 and a connecting pipe 52. The outer wall of the fixed pipe 51 is coaxially fixedly connected with a step ring 511. The inner wall of the mounting port 124 is coaxially provided with a mounting ring groove 1241. The mounting ring groove 1241 extends toward one end close to the valve cavity 121. The mounting ring groove 1241 is used for the step ring 511 to be embedded. The step ring 511 abuts against the groove wall of the mounting ring groove 1241 facing the valve cavity 121.

[0047] A first abutment surface 512 is provided at one end of the fixed tube 51 facing away from the flow channel ring 4, and the distance from the first abutment surface 512 to the step ring 511 decreases as it moves away from the axis of the fixed tube 51. A second abutment surface 521 is provided at one end of the connecting tube 52 facing the fixed tube 51, and the distance from the second abutment surface 521 to the step ring 511 increases as it moves away from the axis of the connecting tube 52. The fixed tube 51 and the connecting tube 52 are circumferentially welded and fixed, and the fixed tube 51 and the connecting tube 52 are connected.

[0048] Reference Figure 3 The fixing assembly 6 includes a connecting rib 61, a fixing plate 62 and a fastener 63. One end of the connecting rib 61 is fixedly connected to the end of the fixing tube 51 away from the connecting tube 52, and the other end of the connecting rib 61 is fixedly connected to the outer wall of the fixing plate 62. The diameter of the fixing plate 62 is smaller than the inner diameter of the fixing tube 51. Four connecting ribs 61 are provided, and the four connecting ribs 61 are evenly spaced around the axis of the fixing plate 62.

[0049] Reference Figure 5 The fixing plate 62 is coaxially provided with a fixing port 621, the inner wall of the flow channel ring 4 is provided with a locking port 43, the locking port 43 is connected to the flow channel groove 41, the fastener 63 includes a fastening column 631, a leak-proof ring 632 and a locking ring 633, the fastening column 631 is threadedly connected to the inner wall of the fixing port 621, the fastening column 631 is coaxially rotatably connected to the inner wall of the locking port 43, the outer wall of the fastening column 631 is coaxially provided with a sealing ring groove 6311, the leak-proof ring 632 is coaxially embedded in the sealing ring groove 6311, the outer wall of the leak-proof ring 632 abuts against the inner wall of the locking port 43, the locking ring 633 is threadedly connected to the outer wall of the fastening column 631, and the locking ring 633 is used to abut against the inner wall of the flow channel ring 4.

[0050] Reference Figure 6 A connecting groove 22 is coaxially provided at one end of the valve stem 2 which is away from the assembly port 132. The connecting groove 22 is connected to the discharge port 123. A connecting port 23 is provided on the outer wall of the valve stem 2. The connecting port 23 is arranged on the side of the flow channel ring 4 away from the valve cover 13. The connecting port 23 is connected to the connecting groove 22. One end of the connecting pipe 7 is coaxially fixedly connected to the inner wall of the connecting port 23. The other end of the connecting pipe 7 is arranged close to the flow channel ring 4. The distance from the other end of the connecting pipe 7 to the flow channel ring 4 is smaller than the distance from one end of the connecting pipe 7 to the flow channel ring 4. The connecting pipe 7 is connected to the installation port 124.

[0051] Reference Figure 7The sealing member 8 comprises a sealing ring 81 and an elastic sheet 82. A placement annular groove 71 is coaxially arranged on the inner wall of one end of the connecting pipe 7 facing the flow channel ring 4. The placement annular groove 71 extends toward the flow channel ring 4 to penetrate the connecting pipe 7. One end of the elastic sheet 82 abuts against the groove wall of the placement annular groove 71 facing the flow channel ring 4. The other end of the elastic sheet 82 abuts against the sealing ring 81. The sealing ring 81 is slidably connected to the groove wall of the placement annular groove 71. The sealing ring 81 abuts against the outer wall of the flow channel ring 4 facing the connecting pipe 7.

[0052] Reference Figure 2 and Figure 8 The outer wall of the valve seat 12 is provided with a cleaning port 125, and the cleaning port 125 is arranged between the feed port 42 and the discharge port 123. The assembly structure between the cleaning pipe 91 and the inner wall of the cleaning port 125 is the same as the assembly structure between the connecting pipe 5 and the inner wall of the installation port 124. The cleaning pipe 91 is welded and fixed to the valve seat 12.

[0053] Reference Figure 6 A multi-way plug valve further includes a baffle 92. The baffle 92 is disposed on a side of the flow channel ring 4 close to the discharge port 123. The baffle 92 is detachably connected to the outer wall of the valve stem 2 by screws. The baffle 92 is attached to a side of the flow channel ring 4 facing the discharge port 123. The baffle 92 is used to block other installation ports 124 when the connecting pipe 7 is connected to a certain installation port 124.

[0054] The implementation principle of a multi-way plug valve in an embodiment of the present application is: assemble the fixed tube 51 from the inside of the valve cavity 121, install the valve stem 2 and the flow channel ring 4 in sequence, fix the fixed tube 51 through the fixing assembly 6, press the forwarding valve cover 13 to complete the assembly, rotate the valve stem 2 to control the connecting tube 7 to be connected with different installation ports 124, and the sealing member 8 makes the connecting tube 7 and the flow channel ring 4 sealed.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-way plug valve, characterized in that: Comprising a valve body (1) and a connecting pipe (5), the valve body (1) being provided with a valve cavity (121), an outer wall of the valve body (1) being provided with a mounting opening (124), the mounting opening (124) being communicated with the valve cavity (121), the connecting pipe (5) being coaxially fixedly connected to the inner wall of the mounting opening (124), and the valve body (1) being formed by a die forging process; The connecting pipe (5) comprises a fixed pipe (51) and a connecting pipe (52), wherein the fixed pipe (51) is coaxially fixedly connected to the inner wall of the installation opening (124), and the connecting pipe (52) is coaxially fixedly connected to an end of the fixed pipe (51) facing away from the valve body (1); The outer wall of the fixed tube (51) is coaxially fixedly connected with a step ring (511), and the inner wall of the mounting opening (124) is coaxially provided with a mounting ring groove (1241), the mounting ring groove (1241) extends toward one end close to the valve cavity (121), the mounting ring groove (1241) is used for the step ring (511) to be embedded, and the step ring (511) abuts against the groove wall of the mounting ring groove (1241) facing the valve cavity (121); It also comprises a valve stem (2) and a connecting pipe (7); the valve body (1) is coaxially provided with an assembly port (132) and a discharge port (123); the assembly port (132) and the discharge port (123) are both connected to the valve cavity (121); the valve stem (2) is coaxially rotatably connected to the inner walls of the assembly port (132) and the discharge port (123); an end of the valve stem (2) which is away from the assembly port (132) is coaxially provided with a connecting groove (22); the connecting groove (22) is connected to the discharge port (123); a plurality of installation ports (124) are provided; the plurality of installation ports (124) are spaced apart around the axis of the valve body (1); a connecting port (23) is provided on the outer wall of the valve stem (2); the connecting port (23) is connected to the connecting groove (22); one end of the connecting pipe (7) is coaxially fixedly connected to the inner wall of the connecting port (23); the other end of the connecting pipe (7) is connected to the installation port (124); It also includes a flow channel ring (4), the flow channel ring (4) is coaxially fixedly connected to the inner wall of the valve cavity (121), the outer wall of the flow channel ring (4) is provided with a flow channel groove (41), there are a plurality of the flow channel grooves (41), the flow channel grooves (41) are connected to the installation port (124) in a one-to-one correspondence, the flow channel ring (4) is provided with a feed port (42) at one end facing the connecting pipe (7), there are a plurality of the feed ports (42), the feed ports (42) are connected to the flow channel grooves (41) in a one-to-one correspondence, and the end of the connecting pipe (7) away from the valve stem (2) is connected to the feed port (42).

2. A multi-way plug valve according to claim 1, characterized in that: A first abutting surface (512) is provided at one end of the fixed pipe (51) facing away from the valve body (1), and the distance between the first abutting surface (512) and the step ring (511) decreases as the distance moves away from the axis of the fixed pipe (51). A second abutting surface (521) is provided at one end of the connecting pipe (52) facing the fixed pipe (51), and the distance between the second abutting surface (521) and the step ring (511) increases as the distance moves away from the axis of the connecting pipe (52). The fixed pipe (51) and the connecting pipe (52) are fixed by welding.

3. A multi-way plug valve according to claim 1, characterized in that: It also comprises a sealing member (8), wherein the sealing member (8) comprises a sealing ring (81), wherein the sealing ring (81) is slidably connected to the inner wall of the connecting pipe (7), and the sealing ring (81) abuts against the outer wall of the flow channel ring (4) facing the connecting pipe (7).

4. A multi-way plug valve according to claim 3, characterized in that: The sealing member (8) further comprises an elastic sheet (82); the inner wall of the connecting tube (7) is coaxially provided with a placement annular groove (71); the placement annular groove (71) extends toward the flow channel ring (4) to penetrate the connecting tube (7); one end of the elastic sheet (82) abuts against the groove wall of the placement annular groove (71) facing the flow channel ring (4); and the other end of the elastic sheet (82) abuts against the sealing ring (81).

5. The multi-way plug valve according to claim 1, characterized in that: It also comprises a connecting rib (61), a fixing plate (62) and a fastener (63), one end of the connecting rib (61) being fixedly connected to an end of the fixing tube (51) facing away from the connecting tube (52), the other end of the connecting rib (61) being fixedly connected to the fixing plate (62), the fixing plate (62) being coaxially provided with a fixing opening (621), the inner wall of the flow channel ring (4) being provided with a locking opening (43), the locking opening (43) being connected to the flow channel groove (41), the fastener (63) being coaxially rotatably connected to the inner wall of the locking opening (43), and the fastener (63) being threadedly connected to the inner wall of the fixing opening (621).

6. A multi-way plug valve according to claim 5, characterized in that: The fastener (63) comprises a fastening column (631), a leak-proof ring (632) and a locking ring (633); the fastening column (631) is coaxially rotatably connected to the inner wall of the locking port (43); the fastening column (631) is threadedly connected to the inner wall of the fixing port (621); the leak-proof ring (632) is sleeved on the outer circumference of the fastening column (631); the leak-proof ring (632) abuts against the inner wall of the fixing port (621); the locking ring (633) is threadedly connected to the outer wall of the fastening column (631); and the locking ring (633) abuts against the inner wall of the flow channel ring (4).

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