Three-way valve and linkage three-way valve

Abstract

A three-way valve belongs to the technical field of valves and comprises a valve body, a valve core, a valve cover, a driving structure and a sealing assembly, the valve element is arranged in the valve body, the valve cover is connected with the valve body and limits the valve element, the valve element is rotatably fixed in a hollow cavity of the valve body, the driving structure penetrates through the valve cover and is connected with the valve element to drive the valve element to rotate, and opening and closing control over all inlets and outlets of the valve body is achieved; sealing structures are arranged between the valve body and the valve element, between the valve body and the valve deck and between the valve deck and the driving structure. The valve element is provided with a cylindrical barrel, and the size of the barrel is matched with that of an inner cavity of the valve body. End discs are arranged at the two ends of the cylinder body to form a cylindrical cavity structure; a valve handle groove is formed in one of the two end discs and used for being connected with a driving structure. The valve is light in weight, low in cost, convenient to maintain and good in sealing performance.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a three-way valve and a linked three-way valve. Background Art

[0002] A valve is a mechanical product with a movable mechanism used to control the medium in a pipeline. Valves are classified according to their structure, including gate valves, ball valves, butterfly valves, diaphragm valves, etc. The structure of a valve includes a valve body and a valve core. The valve body is provided with an inner cavity, and the valve core is installed in the inner cavity of the valve body. The valve can be used at different flow rates by moving or rotating the valve core.

[0003] The current valve bodies are made through casting, forging, welding and other processes. Each process has its limitations. The development and wide application of new materials have expanded our thinking.

[0004] Since the pipe diameters of pipelines in daily use mostly adopt national standard pipe diameters, the connection between pipelines and valves is usually flange connection. The valve body and valve core process of the valve are processed, and the workpiece after casting is processed. The processing technology is cumbersome, costly and wastes raw materials.

[0005] In particular, most valve cores are made of spherical valve cores, wedge-type gates, stop valve discs, tapered plugs, etc., which are solid designs and heavy in weight. Assembly and maintenance are very laborious and time-consuming for maintenance personnel. All valve maintenance and repair must be performed by highly qualified personnel, or directly shipped back to the valve manufacturer for repair.

[0006] Due to the above reasons, through research on actual usage scenarios of a large number of manufacturers, it was found that there is a strong demand for the weight of the valve, the convenience of maintenance, and the sealing of the valve body. Summary of the invention

[0007] The purpose of the present invention is to provide a three-way valve and a linkage three-way valve to solve the technical problems of simple later maintenance, excessive weight of the valve, waste of materials, complicated processing and high cost.

[0008] In order to solve the above technical problems, the specific technical solutions of the three-way valve and the linked three-way valve of the present invention are as follows:

[0009] A three-way valve comprises a valve body, a valve core, a valve cover, a driving structure and a sealing assembly;

[0010] The valve core is arranged in the valve body, the valve cover is connected to the valve body and limits the valve core, the valve core is rotatably fixed in the hollow cavity of the valve body, and the driving structure passes through the valve cover and is connected to the valve core to drive the valve core to rotate, thereby realizing the opening and closing control of each inlet and outlet of the valve body;

[0011] A sealing structure is provided between the valve body and the valve core, between the valve body and the valve cover, and between the valve cover and the driving structure;

[0012] The valve core has a cylinder, which is cylindrical and has a size that matches the size of the inner cavity of the valve body.

[0013] End plates are provided at both ends of the cylinder to form a cylindrical cavity structure;

[0014] A valve handle groove is arranged on one of the two end discs, and the valve handle groove is used to be connected with the driving structure.

[0015] Furthermore, a gap is left between the end disc and the edge of the cylinder; the annular structure formed by the cylinder outside the end disc is a rotating ring.

[0016] Furthermore, two passage holes are provided on the side wall of the cylinder, and the two passage holes are arranged in an L shape;

[0017] The medium can pass through the inside of the valve core.

[0018] Furthermore, a sealing groove is provided on the side wall of the cylinder body symmetrically with the two channel holes, and the diameter of the sealing groove should be larger than the diameter of the three pipe connection ports of the valve body; a sealing ring is provided in the sealing groove;

[0019] Inside the valve core, a guide plate is arranged between the two channel holes. The guide plate is L-shaped as a whole, with two sides connected to the channel holes, and the curved surface of the L-shape is away from the two channel holes;

[0020] The L-shaped guide plate guides the medium passing through the valve core, avoiding the medium from generating turbulence in the valve core and reducing the resistance of the medium passing through the valve.

[0021] The channel is in an arc shape, and the medium flow parameters are similar to those of an elbow of the same size.

[0022] Furthermore, inside the valve core, a guide plate is arranged between the two channel holes. The guide plate is L-shaped as a whole, with two sides connected to the channel holes, and the curved surface of the L-shape is away from the two channel holes.

[0023] Furthermore, the valve body has a main body, which is a cylindrical hollow structure with a single-side opening; an assembly port is provided at the open end, a screw hole is provided on the assembly port, and a ring groove is provided inside the connection between the assembly port and the main body;

[0024] Three pipe connection ports are arranged on the cylindrical side wall of the main body, namely a first port, a second port and a third port, and the three pipe connection ports are arranged in a T-shaped parallel arrangement.

[0025] Furthermore, the pipeline connection port may be provided with a flange for connecting with the flange of the pipeline, and the flange is provided with a connection hole.

[0026] The flange is provided with grooves or holes for installing sealing components.

[0027] Furthermore, the valve cover has a base plate, which is disc-shaped and has a through hole in the center;

[0028] A sealing column is arranged at the central through hole of the base plate. The sealing column is a hollow structure, and its central through hole is connected with the central through hole of the base plate.

[0029] A bead ring is arranged on the outer ring of the base plate on one side of the sealing column, and the bead ring is an annular truncated cone protruding from the base plate;

[0030] A connecting hole corresponding to the screw hole provided on the valve body assembly port is provided on the circular edge of the base plate;

[0031] An outer sealing groove is arranged at the position of the central through hole of the base plate on the back side of the sealing column, and an inner sealing groove is arranged on the inner side of one end of the sealing column away from the base plate.

[0032] Furthermore, a drag reduction device is arranged between the rotating ring of the valve core and the valve body and between the rotating ring of the valve core and the bead ring of the valve cover; the drag reduction device is a group of steel balls, which are installed in bead grooves arranged on the bead pad, and the diameter of the bead pad is consistent with the diameter of the rotating ring and the bead ring.

[0033] Furthermore, the driving structure is a valve stem, which includes a cylindrical rod body and an end head arranged on one side of the rod body, the end head is cylindrical and has a diameter larger than the rod body; the end head lies in the inner sealing groove of the valve cover sealing column;

[0034] A thread is arranged on one side of the rod body away from the end head, and a driven surface is arranged on the rod body with the thread.

[0035] A driving surface is provided on the top side of the end piece, so that the end piece can be inserted into the valve handle groove;

[0036] Two sealing mechanisms are arranged at the part of the rod body near the end, namely the first groove and the second groove. Sealing rings are installed in the two sealing mechanisms for sealing between the rod body and the valve cover.

[0037] Further, the sealing assembly includes a sealing gasket, a sealing ring, a disc spring, a lock nut and a cover sealing ring;

[0038] The cover seal ring is arranged in the annular groove of the valve body, and the valve cover is connected to the valve body through the end cover bolts, and the cover seal ring is pressed tightly, so that the valve body and the valve cover form a seal;

[0039] The sealing ring is arranged in the first groove and the second groove of the rod body to form a seal with the sealing column of the valve cover;

[0040] The sealing gasket is arranged in the outer sealing groove of the valve cover, and a disc spring sleeved on the valve stem is pressed outside the sealing gasket, and the disc spring is connected with a lock nut; there are two lock nuts sleeved on the threads of the valve stem.

[0041] Furthermore, a positioning block is arranged between the two lock nuts, and the position of the positioning block is limited by a limiting block and a limiting bolt; the limiting block is arranged between the positioning block and the valve cover, and the limiting bolt connects the positioning block and the limiting block.

[0042] Furthermore, a handle is connected to the valve, a rotating sleeve is provided at one end of the handle, the rotating sleeve is sleeved on the valve stem, and the valve stem is driven to rotate through the driven surface.

[0043] The present invention also provides a linkage three-way valve using the above three-way valve, comprising an upper three-way valve, a lower three-way valve and a connecting piece;

[0044] The upper three-way valve and the lower three-way valve are the three-way valves described in any one of the technical solutions above;

[0045] The connector is a rotating sleeve, which is open at both ends, and each opening is connected to a valve stem of a three-way valve.

[0046] Furthermore, the driving device can be a handle or a worm gear manual device or a linkage reducer device.

[0047] Furthermore, a support frame is provided on the valve, and the support frame is connected to the fixing hole by bolts;

[0048] The support frame is used to connect the driving device so that the driving device can run stably without shaking or swaying.

[0049] The three-way valve and the linked three-way valve of the present invention have the following advantages:

[0050] 1. Structural design optimization: The sealing ring of the valve core of the three-way valve in the present invention is a key component for solving internal leakage. It is easy to replace and can be replaced by a general fitter, which greatly reduces the maintenance cost.

[0051] 2. Excellent sealing performance: The sealing structure adopted by the valve core and the side wall has a better sealing effect than the current structure in which the valve core is sealed with the outlet.

[0052] 3. Easy to operate: The driving component is the valve stem, and the valve switch control is achieved through the connection between the valve stem and the valve core.

[0053] 4. Wide application scope: The three-way valve and its linkage three-way valve described in the present invention can completely replace the ball valve and can also be used for half-open throttling. They are widely used in petroleum, chemical, construction, water supply, drainage and other industries and have broad market prospects.

[0054] 5. Environmental protection and energy saving: The present invention adopts an efficient sealing design, which reduces valve leakage and energy loss, is beneficial to environmental protection and energy saving. Due to the substantial lightening of the valve core, the power consumption during installation and use is significantly reduced.

[0055] 6. High cost performance of valves: The valve adopts modular design, which is convenient for maintenance and replacement of parts, reduces the maintenance cost of the valve, and greatly reduces the processing cost and material cost of the valve core. The weight of the valve core is reduced by 50%, and the cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A schematic structural diagram of a linkage three-way valve according to an embodiment;

[0057] Figure 2 A side view of a linkage three-way valve according to an embodiment;

[0058] Figure 3 For an embodiment Figure 2 AA cross-sectional structural diagram;

[0059] Figure 4 A front view of a linkage three-way valve according to an embodiment of the present invention

[0060] Figure 5 For an embodiment Figure 4 BB cross-sectional structure diagram;

[0061] Figure 6 is a schematic structural diagram of a valve body according to an embodiment;

[0062] Figure 7 It is a front view structural schematic diagram of a valve body of an embodiment;

[0063] Figure 8 A side structural schematic diagram of a valve body according to an embodiment;

[0064] Fig. 9 For an embodiment Figure 7 BB cross-sectional view;

[0065] Fig.10 For an embodiment Figure 8 CC section view;

[0066] Fig.11 A front view of a valve cover according to an embodiment;

[0067] Fig.12 For an embodiment Fig.11 AA section view;

[0068] Fig.13 A right side view of a valve cover according to an embodiment;

[0069] Fig.14 A left side view of a valve cover according to an embodiment;

[0070] Fig.15It is a structural schematic diagram of a valve core of an embodiment;

[0071] Fig.16 A top view of a valve core according to an embodiment;

[0072] Fig.17 A front view of a valve core according to an embodiment;

[0073] Fig.18 For an embodiment Fig.17 AA section view;

[0074] Fig.19 A top view and a front view of a bead pad according to an embodiment;

[0075] Fig. 20 is a schematic structural diagram of a valve stem according to an embodiment;

[0076] Fig.21 A front view of a valve stem according to an embodiment;

[0077] Fig. 22 For an embodiment Fig.21 AA section view;

[0078] Fig.23 A top view of a valve stem according to an embodiment;

[0079] Fig.24 For an embodiment Fig.21 BB cross-sectional view;

[0080] Description of the markings in the figure:

[0081] 1. Valve body, 1-1, main body, 1-2, first port, 1-3, second port, 1-4, third port, 1-5, assembly port, 1-6, screw hole, 1-7, ring groove,

[0082] 2. Valve core, 2-1. Cylinder, 2-2. End plate, 2-3. Valve handle groove, 2-4. Channel hole, 2-5. Sealing groove, 2-6. Rotating ring, 2-7. Sealing ring, 2-8. Guide plate,

[0083] 3. Valve cover, 3-1. Base plate, 3-2. Bead ring, 3-3. Sealing column, 3-4. External sealing groove, 3-5. Internal sealing groove, 3-6. Connecting hole,

[0084] 4. Valve stem, 4-1. Rod body, 4-2. End, 4-3. Driving surface, 4-4. Thread, 4-5. Driven surface, 4-6. First groove, 4-7. Second groove,

[0085] 5. Sealing gasket, 6. Sealing ring, 7. Disc spring, 8. Limit block, 9. Positioning block, 10. Limit bolt, 11. Handle, 11-1, Rotating sleeve, 12. Lock nut, 13. Cover sealing ring, 14. Bead pad, 14-1, Bead groove, 15. Steel ball, 17. End cover bolt. DETAILED DESCRIPTION

[0086] In order to better understand the purpose, structure and function of the present invention, a three-way valve and a linkage three-way valve of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0087] Commonly used linkage three-way valves usually use two three-way valves to drive through a linkage device to achieve opening and closing control and channel control of the two three-way valves.

[0088] Since the pipe diameters of pipelines in daily use mostly adopt national standard pipe diameters, the connection between pipelines and valves is usually flange connection. The valve body and valve core of the valve are cast, and the cast workpiece is then processed. The processing technology is cumbersome, costly and wastes raw materials.

[0089] In particular, most valve cores are spherical valve cores with solid design and heavy weight, which makes assembly and maintenance very laborious and time-consuming for maintenance personnel.

[0090] Due to the above reasons, through research on actual usage scenarios of a large number of manufacturers, it was found that there is a strong demand for the weight of the valve, the convenience of maintenance, and the sealing of the valve body, so the present invention provides an improved valve structure.

[0091] Taking a three-way valve as an example, its structure and connection relationship are introduced in detail.

[0092] like Figure 1-5 As shown, the overall structure of the three-way valve monomer and the linked three-way valve is shown, and the connection relationship between the various components of the three-way valve is also shown.

[0093] A three-way valve comprises a valve body 1, a valve core 2, a valve cover 3, a driving structure and a sealing assembly;

[0094] The valve core 2 is arranged in the valve body 1, the valve cover 3 is connected to the valve body 1 and limits the valve core 2, the valve core 2 is rotatably fixed in the hollow cavity of the valve body 1, and the driving structure passes through the valve cover 3 and is connected to the valve core 2 to drive the valve core 2 to rotate, thereby realizing the opening and closing control of each inlet and outlet of the valve body 1;

[0095] Sealing components may be provided between the valve body 1 and the valve core 2, between the valve body 1 and the valve cover 3, and between the valve cover 3 and the driving structure.

[0096] like Figure 6-10 As shown, the structure of the valve body 1 and the structures of each component are shown.

[0097] The valve body 1 has a main body 1-1, which is a cylindrical hollow structure with a single-side opening; an assembly port 1-5 is provided at the open end, a screw hole 1-6 is provided on the assembly port 1-5, and an annular groove 1-7 is provided on the inner side of the connection between the assembly port and the main body 1-1.

[0098] Three pipe connection ports are arranged on the cylindrical side wall of the main body 1-1, namely a first port 1-2, a second port 1-3 and a third port 1-4, and the three pipe connection ports are arranged in a T-shaped parallel arrangement.

[0099] A flange can be provided at the pipe connection port for connection with the flange of the pipe, and connection holes 3-6 are provided on the flange to facilitate fastening operations.

[0100] The flange may also be provided with grooves or holes for mounting sealing components.

[0101] Figure 11-14 The detailed structure of the valve cover 3 is shown.

[0102] The valve cover 3 has a base plate 3-1, which is disc-shaped and has a through hole in the center;

[0103] A sealing column 3-3 is arranged at the position of the central through hole of the base plate 3-1. The sealing column 3-3 is a hollow structure, and its central through hole is connected to the central through hole of the base plate 3-1.

[0104] A bead ring 3-2 is arranged on the outer ring of the base plate 3-1 on one side of the sealing column 3-3. The bead ring 3-2 is an annular cone protruding from the base plate 3-1. A connecting hole 3-6 corresponding to the screw hole 1-6 arranged on the assembly port 1-5 of the valve body 1 is arranged on the circular edge of the base plate 3-1.

[0105] An outer sealing groove 3-4 is provided at the central through hole position of the base plate 3-1 on the back side of the sealing column 3-3, and an inner sealing groove 3-5 is provided on the inner side of the end of the sealing column 3-3 away from the base plate 3-1.

[0106] Figure 15-18 , showing the innovative valve core 2 design structure of the present invention, and showing each component in detail.

[0107] The valve core 2 has a cylinder 2 - 1 , which is cylindrical and has a size that matches the size of the inner cavity of the main body 1 - 1 of the valve body 1 .

[0108] End plates 2-2 are provided at both ends of the cylinder 2-1 to form a cylindrical cavity structure.

[0109] There is a gap between the edge of the end plate 2-2 and the cylinder 2-1; the annular structure formed by the cylinder 2-1 outside the end plate 2-2 is a rotating ring 2-6;

[0110] Two passage holes 2-4 are provided on the side wall of the cylinder 2-1, and the two passage holes 2-4 are arranged in an L shape.

[0111] The inside of the valve core 2 can pass through the medium.

[0112] A sealing groove 2-5 is provided on the side wall of the cylinder 2-1 symmetrical to the two channel holes 2-4. The diameter of the sealing groove 2-5 should be larger than the diameter of the three pipe connection ports of the valve body 1. A sealing ring 2-7 is provided in the sealing groove 2-5.

[0113] A valve handle groove 2-3 is provided on one of the two end discs 2-2 for connecting with a driving structure.

[0114] like Fig.18 As shown, a further improved structure of the valve core 2 is shown.

[0115] Inside the valve core 2, a guide plate 2-8 is arranged between the two channel holes 2-4. The guide plate 2-8 is L-shaped as a whole, with two sides connected to the channel holes 2-4, and the curved surface of the L-shape is away from the two channel holes 2-4.

[0116] The L-shaped guide plate 2-8 guides the medium passing through the valve core 2, thereby preventing the medium from generating turbulence in the valve core 2 and reducing the resistance of the medium passing through the valve.

[0117] The channel is formed into an arc shape, and the medium flow parameters are similar to those of an elbow of the same size.

[0118] Figure 20-24 The specific structure of the valve stem 4 is shown.

[0119] The driving structure is a valve stem 4, which includes a cylindrical rod body 4-1 and an end head 4-2 arranged on one side of the rod body 4-1. The end head 4-2 is cylindrical and has a diameter larger than the rod body 4-1. When installed, the end head 4-2 lies in the inner sealing groove 3-5 of the sealing column 3-3 of the valve cover 3.

[0120] A thread 4-4 is provided on the side of the rod body 4-1 away from the end head 4-2, a driven surface 4-5 is provided on the rod body 4-1 provided with the thread 4-4, and a driving surface 4-3 is provided on the top side of the end head 4-2 so that the end head 4-2 can be inserted into the valve handle groove 2-3.

[0121] Two sealing mechanisms are arranged at the part of the rod body 4 - 1 near the end 4 - 2 , namely the first groove 4 - 6 and the second groove 4 - 7 . Sealing rings 6 can be installed in the two sealing mechanisms for sealing between the rod body 4 - 1 and the valve cover 3 .

[0122] Figure 1-5 The connection relationship between the sealing component of the assembled three-way valve and the various components of the valve is shown.

[0123] The sealing assembly includes a sealing gasket 5, a sealing ring 6, a disc spring 7, a lock nut 12 and a cover sealing ring 13;

[0124] The cover seal ring 13 is arranged in the annular groove 1 - 7 of the valve body 1 , and the valve cover 3 is connected to the valve body 1 through the end cover bolts 17 , and the cover seal ring 13 is pressed tightly, so that the valve body 1 and the valve cover 3 form a seal.

[0125] The sealing ring 6 is arranged in the first groove 4 - 6 and the second groove 4 - 7 of the rod body 4 - 1 to form a seal with the sealing column 3 - 3 of the valve cover 3 .

[0126] The sealing gasket 5 is arranged in the outer sealing groove 3-4 of the valve cover 3, and the sealing gasket 5 is pressed by a disc spring 7 sleeved on the valve stem 4, and the disc spring 7 is connected to a lock nut 12. There are two lock nuts 12 sleeved on the thread 4-4 of the valve stem 4, and the two lock nuts 12 can be tightened to fix the position.

[0127] In order to further stabilize and control the extrusion force of the disc spring 7, a positioning block 9 is arranged between the two lock nuts 12, and the position of the positioning block 9 is limited by the limit block 8 and the limit bolt 10. The limit block 8 is arranged between the positioning block 9 and the valve cover 3. In order to prevent the limit block 8 from being separated during use, the limit bolt 10 is used to connect the positioning block 9 and the limit block 8.

[0128] In order to facilitate the control of the valve, a handle 11 is connected to the valve. A rotating sleeve 11 - 1 is provided at one end of the handle 11 . The rotating sleeve 11 - 1 is sleeved on the valve stem 4 and drives the valve stem 4 to rotate through the driven surface 4 - 5 .

[0129] In order to further reduce the difficulty of operating the valve, a drag reduction device is arranged between the rotating ring 2-6 of the valve core 2 and the valve body 1, and between the rotating ring 2-6 of the valve core 2 and the bead ring 3-2 of the valve cover 3; the drag reduction device is a group of steel balls 15, and the steel balls 15 are installed in the bead groove 14-1 arranged on the bead pad 14, and the diameter of the bead pad 14 is consistent with the diameter of the rotating ring 2-6 and the bead ring 3-2.

[0130] The valve body 1, the cylinder 2-1 and the valve cover 3 can be made of WCB cast steel, or a stainless steel plate or a stainless steel pipe.

[0131] The present invention also provides a design scheme of a linkage three-way valve made of the above three-way valve. The linkage three-way valve is composed of two three-way valves, which are placed up and down, and the control part handle 11 of the valve is placed in the center. As the handle 11 rotates, the valve stem 4 is driven, and the valve stem 4 drives the valve core 2 to rotate.

[0132] Each three-way valve body 1 is designed with three pipe connection ports, and the three-way valve core 2 is rotated to change the flow direction of the liquid to achieve three-way.

[0133] Figure 1-5 The structure of the linkage tee is shown.

[0134] A linkage three-way valve, comprising an upper three-way valve 100, a lower three-way valve 200 and a connecting piece,

[0135] The upper three-way valve 100 and the lower three-way valve 200 are the three-way valves described above.

[0136] The connecting piece is a rotating sleeve 11-1 arranged at the front end of the handle 11. The rotating sleeve 11-1 is open at both ends, and each opening is connected to a valve stem 4 of a three-way valve.

[0137] Of course, it is also possible to adopt a method in which the valve stem 4 of each valve is first connected to a connecting sleeve, and the connecting sleeve is then connected to the rotating sleeve 11 - 1 .

[0138] The handle 11 that plays a driving role can be replaced by a worm gear manual device (the inlet and outlet of the upper and lower valves are in the same direction), or a linkage reducer device (the inlet and outlet of the upper and lower valves are in different directions).

[0139] A support frame may also be provided on the valve, and the support frame is connected to the valve cover 3 via bolts.

[0140] The support frame is used to connect the driving device so that the driving device can run stably without shaking or swaying, reduce the wear of the valve stem 4, valve core 2 and valve cover 3, and also reduce the additional wear of the sealing structure, thereby increasing the service life of the valve.

[0141] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A three-way valve, characterized in that: It includes valve body, valve core, valve cover, driving structure and sealing assembly; The valve core is arranged in the valve body, the valve cover is connected to the valve body and limits the valve core, the valve core is rotatably fixed in the hollow cavity of the valve body, and the driving structure passes through the valve cover and is connected to the valve core to drive the valve core to rotate, thereby realizing the opening and closing control of each inlet and outlet of the valve body; Sealing components are provided between the valve body and the valve core, between the valve body and the valve cover, and between the valve cover and the driving structure; The valve core has a cylinder, which is cylindrical and has a size that matches the size of the inner cavity of the valve body. End plates are provided at both ends of the cylinder to form a cylindrical cavity structure; A valve handle groove is arranged on one of the two end discs, and the valve handle groove is used to be connected with the driving structure.

2. The three-way valve according to claim 1, characterized in that: There is a gap between the end plate and the edge of the cylinder; the annular structure formed by the cylinder outside the end plate is a rotating ring.

3. The three-way valve according to claim 2, characterized in that: Two passage holes are provided on the side wall of the cylinder, and the two passage holes are arranged in an L shape; The medium can pass through the inside of the valve core.

4. The three-way valve according to claim 3, characterized in that: A sealing groove is provided on the side wall of the cylinder body symmetrically with two channel holes, and the diameter of the sealing groove should be larger than the diameter of the three pipe connection ports of the valve body; a sealing ring is provided in the sealing groove; Inside the valve core, a guide plate is arranged between the two channel holes. The guide plate is L-shaped as a whole, with two sides connected to the channel holes, and the curved surface of the L-shape is away from the two channel holes; The L-shaped guide plate guides the medium passing through the valve core, avoiding the medium from generating turbulence in the valve core and reducing the resistance of the medium passing through the valve. The channel is formed into an arc shape, and the medium flow parameters are similar to those of an elbow of the same size.

5. The three-way valve according to claim 4, characterized in that: Inside the valve core, a guide plate is arranged between the two channel holes. The guide plate is L-shaped as a whole, with two sides connected to the channel holes, and the curved surface of the L-shape is away from the two channel holes.

6. The three-way valve according to claim 3, characterized in that: The valve body has a main body, which is a cylindrical hollow structure with a single-side opening; an assembly port is provided at the open end, a screw hole is provided on the assembly port, and a ring groove is provided on the inner side of the connection between the assembly port and the main body; Three pipe connection ports are arranged on the cylindrical side wall of the main body, namely a first port, a second port and a third port, and the three pipe connection ports are arranged in a T-shaped parallel arrangement.

7. The three-way valve according to claim 6, characterized in that: The pipe connection port can be provided with a flange for connecting with the flange of the pipe, and the flange is provided with a connection hole. The flange is provided with grooves or holes for installing sealing components.

8. The three-way valve according to claim 6, characterized in that: The valve cover has a base plate, which is disc-shaped and has a through hole in the center; A sealing column is arranged at the central through hole of the base plate. The sealing column is a hollow structure, and its central through hole is connected with the central through hole of the base plate. A bead ring is arranged on the outer ring of the base plate on one side of the sealing column, and the bead ring is an annular truncated cone protruding from the base plate; A connecting hole corresponding to the screw hole provided on the valve body assembly port is provided on the circular edge of the base plate; An outer sealing groove is arranged at the position of the central through hole of the base plate on the back side of the sealing column, and an inner sealing groove is arranged on the inner side of one end of the sealing column away from the base plate.

9. The three-way valve according to claim 8, characterized in that: A drag reducing device is arranged between the rotating ring of the valve core and the valve body and between the rotating ring of the valve core and the bead ring of the valve cover; the drag reducing device is a group of steel balls, which are installed in bead grooves arranged on the bead pad, and the diameter of the bead pad is consistent with the diameter of the rotating ring and the bead ring.

10. The three-way valve according to claim 8, characterized in that: The driving structure is a valve stem, which includes a cylindrical rod body and an end head arranged on one side of the rod body, the end head is cylindrical and has a diameter larger than the rod body; the end head lies in the inner sealing groove of the valve cover sealing column; A thread is arranged on one side of the rod body away from the end head, and a driven surface is arranged on the rod body with the thread. A driving surface is provided on the top side of the end piece, so that the end piece can be inserted into the valve handle groove; Two sealing mechanisms are arranged at the part of the rod body near the end, namely the first groove and the second groove. Sealing rings are installed in the two sealing mechanisms for sealing between the rod body and the valve cover.

11. The three-way valve according to claim 10, characterized in that: The sealing assembly comprises a sealing gasket, a sealing ring, a disc spring, a lock nut and a cover sealing ring; The cover seal ring is arranged in the annular groove of the valve body, and the valve cover is connected to the valve body through the end cover bolts, and the cover seal ring is pressed tightly, so that the valve body and the valve cover form a seal; The sealing ring is arranged in the first groove and the second groove of the rod body to form a seal with the sealing column of the valve cover; The sealing gasket is arranged in the outer sealing groove of the valve cover, and a disc spring sleeved on the valve stem is pressed outside the sealing gasket, and the disc spring is connected with a lock nut; there are two lock nuts sleeved on the threads of the valve stem.

12. The three-way valve according to claim 11, characterized in that: A positioning block is arranged between the two lock nuts, and the position of the positioning block is limited by a limiting block and a limiting bolt; the limiting block is arranged between the positioning block and the valve cover, and the limiting bolt connects the positioning block and the limiting block.

13. The three-way valve according to claim 10, characterized in that: A handle is connected to the valve, one end of the handle is provided with a rotating sleeve, the rotating sleeve is sleeved on the valve stem, and the valve stem is driven to rotate through the driven surface.

14. A linkage three-way valve using the three-way valve according to any one of claims 1 to 13, characterized in that: It includes an upper three-way valve, a lower three-way valve and a connecting piece; The upper three-way valve and the lower three-way valve are the three-way valves according to any one of claims 1 to 13; The connector is a rotating sleeve, which is open at both ends, and each opening is connected to a valve stem of a three-way valve.

15. The linkage tee according to claim 14, characterized in that: The driving device can be a handle or a worm gear manual device or a linkage reducer device.

16. The linkage tee according to claim 15, characterized in that: A support frame is arranged on the valve, and the support frame is connected to the fixing hole through bolts; The support frame is used to connect the driving device so that the driving device can run stably without shaking or swaying.

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