Valve switch assembly, valve and reversing valve

Abstract

The invention discloses a valve switch assembly, a valve and a reversing valve, and the valve switch assembly comprises a valve clack which is movably arranged in a valve body and corresponds to a medium outlet; and the valve rod is connected with the valve clack and pushes the valve clack to move to open and close the medium outlet through lifting of the valve rod. The guide face arranged on the movable valve rod abuts against the inclined face of the through hole in the valve clack, and under the action of the guide face and the inclined face, opening and sealing of the medium outlet by the valve clack are completed.

Description

Technical Field

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

[0002] The three-way valve is a control component in the fluid conveying system. The valve body has three ports, which are used to guide different conveying channels according to the conveying requirements. It is mainly used to change the flow direction of the medium. In addition to the inlet A and the outlet B, the three-way valve also has a reversing port C. By opening the valve, the medium enters the valve from A and flows out through B. When the medium needs to flow into other channels, the actuator is opened, the valve core is switched, and the medium enters from port A and flows out from port C. When the pipeline does not need the medium to flow in, the actuator is opened and the valve is closed to cut off the medium.

[0003] At present, three-way valves used in low-pressure pipelines, especially in vacuum, ventilation, low-pressure water pipe switching, etc., mainly include ball valves, butterfly valves and flapper valves. However, these commonly used three-way valves have certain defects. The existing different types of three-way valves require more materials during manufacturing, which is too costly. The existing three-way valves use elastic components to achieve the seal between the valve disc and the medium outlet. After long-term use, the elasticity of the elastic components weakens, and the sealing effect weakens.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a valve switch assembly which is convenient to open and close, has a long service life and a small operating force; The present invention also provides a valve that is easy to open and close and has a long service life; The present invention also provides a reversing valve which is convenient to open and close, has a long service life, a simple structure and a small operating force.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: A valve switch assembly, comprising A valve disc is movably disposed in the valve body and corresponds to the medium outlet; The valve stem is connected to the valve disc, and the valve disc is pushed up and down to move the switch medium outlet.

[0007] Furthermore, the valve flap is provided with a through hole, the valve stem is provided with a guide surface, the guide surface passes through the through hole and is located in the through hole, the through hole extends obliquely along the axial direction of the valve stem to form an inclined surface, and during the lifting process of the valve stem, the guide surface abuts against the inclined surface to push the valve flap to open or seal the medium outlet.

[0008] Furthermore, a notch is provided at at least one end of the guide surface along the axial direction of the valve stem.

[0009] Furthermore, the inclined surface of the valve disc through hole is inclined toward the sealing end of the valve disc, and the corresponding inclined surface of the guide surface of the valve stem is inclined toward the sealing end along the axial direction.

[0010] Furthermore, a valve comprises a valve body, wherein the valve switch assembly described in any one of the above items is arranged in the valve body.

[0011] Furthermore, a reversing valve comprises a valve body, the valve body is provided with the valve switch assembly as described in any one of the above items and at least two medium outlets, the valve flap is rotatably located in the valve body and can be rotated to the corresponding medium outlet to close the medium outlet; Preferably, the reversing valve comprises A lifting rod, used to drive the valve stem to move up and down along the axial direction; The rotating rod is used to drive the valve stem to rotate, and the valve stem drives the valve disc to rotate.

[0012] Furthermore, the lifting rod is connected to the valve stem in a lifting manner, and the rotating rod is connected to the valve stem in a rotating manner; The lifting rod is sleeved on the outer circumference of the rotating rod.

[0013] Further, the lifting rod is connected to the valve stem in a relatively rotatable manner; Preferably, a groove is provided at one end of the valve stem close to the lifting rod, a protrusion extends outwardly from one end of the lifting rod extending into the groove, a hanging plate is provided at the opening of the groove, the hanging plate is fixedly connected to the valve stem, the hanging plate is on the moving path of the protrusion, and the hanging plate is driven to move up and down by the protrusion of the lifting rod; More preferably, the hanging plate is integrally provided with the valve stem.

[0014] Furthermore, the groove is an annular groove, the annular groove is coaxially provided with a socket, and the rotating rod is inserted in the socket.

[0015] Furthermore, wear-resistant rings are provided on both sides of the valve disc along the axial direction of the valve stem.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: 1. The present invention passes through the through hole of the rotatable valve disc through the guide surface on the movable valve stem, and the inclined surface in the through hole abuts against the guide surface. During the movement of the valve stem, the guide surface abuts against the inclined surface to push the valve disc to open or seal the medium outlet; 2. The present invention provides a notch at one axial end of the guide surface so that the valve stem can move a certain distance along the axial direction; 3. The present invention uses a lifting rod arranged at one end of the valve stem along the axial direction, a protrusion is arranged on the lifting rod, and a hanging plate is arranged at one axial end of the protrusion, the hanging plate is connected to the valve stem, and the protrusion is located between the valve stem and the hanging plate. The lifting and lowering of the lifting rod is controlled by the lifting drive mechanism to drive the hanging plate to move, thereby driving the valve stem to move; 4. The present invention provides a rotating rod at one end of the valve stem along the axial direction, the rotating rod is connected to the valve stem, and the protruding parts of the lifting rod are slidably connected to the valve stem and the hanging plate along both sides of the axial direction. The rotating rod is controlled by a rotating driving mechanism to drive the valve stem to rotate, thereby driving the valve disc to rotate and switch the flow channel of the three-way valve. During the rotation process, the hanging plate, the valve stem and the protruding parts of the lifting rod are slidably connected to avoid damage to the lifting rod caused by the rotation.

[0017] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings: Figure 1 is a schematic diagram of an overall half section of the three-way valve of the present invention; Figure 2 The present invention Figure 1 Schematic cross-sectional view; Figure 3 is a cross-sectional schematic diagram of the valve of the present invention; Figure 4 is a cross-sectional schematic diagram of the valve body portion of the present invention; Figure 5 It is a cross-sectional schematic diagram of the valve stem of the present invention.

[0019] In the figure: 1. valve body; 2. valve stem; 21. notch; 22. guide surface; 23. groove; 24. socket; 3. wear-resistant ring; 4. valve disc; 41. inclined surface; 5. lifting rod; 51. protrusion; 6. hanging plate; 7. rotating rod; 8. valve neck; 9. lifting drive mechanism; 10. rotating drive mechanism; 11. limit device; 12. medium inlet; 13. medium outlet; 131. first medium outlet; 132. second medium outlet; 14. upper valve body; 15. lower valve body; 141. upper shaft sleeve; 151. lower shaft sleeve.

[0020] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0022] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figures 1 to 5 As shown, the present invention provides a valve switch assembly, including a valve flap 4, which is movably arranged in a valve body 1 and corresponds to a medium outlet 13; The valve stem 2 is connected to the valve disc 4, and the valve disc 4 is pushed up and down by the valve stem 2 to move the switch medium outlet 13.

[0025] The valve stem 2 is driven to rise and fall by an existing lifting device or a lifting motor. During the lifting process, the valve stem 2 abuts against the valve flap 4 to push the valve flap 4 to complete the opening and sealing of the medium outlet 13 .

[0026] In a further implementation scheme, a through hole is provided on the valve flap 4, and a guide surface 22 is provided on the valve stem 2. The guide surface 22 passes through the through hole and is located in the through hole. The through hole extends obliquely along the axial direction of the valve stem 2 to form an inclined surface 41. During the lifting process of the valve stem 2, the guide surface 22 abuts against the inclined surface 41 to push the valve flap 4 to open or seal the medium outlet 13.

[0027] Specifically, a through hole is provided on the valve disc 4, and the valve stem 2 is columnar and is arranged through the through hole. The through hole is inclined along the axial direction of the valve stem 2 toward the direction of the medium outlet 13 to form an inclined surface 41. The valve stem 2 is columnar, and a guide surface 22 is provided corresponding to the inclined surface 41. The valve stem 2 extends axially for a certain distance and then extends obliquely, and then extends axially after being obliquely extended for a certain distance. The guide surface 22 passes through the through hole and is arranged corresponding to the inclined surface 41. During the lifting process of the valve stem 2, the guide surface 22 abuts against the inclined surface 41 to push the valve disc 4 to open or seal the medium outlet 13.

[0028] In a further embodiment, a notch 21 is provided at at least one end of the guide surface 22 along the axial direction of the valve stem 2 .

[0029] Specifically, the valve stem 2 is columnar, and a notch 21 is provided at one axial end of the guide surface 22. The guide surface 22 is located on both end surfaces along the sealing direction. In one implementation scheme, a notch 21 is provided at one axial end of the guide surface 22 away from the sealing end. The notch 21 is arranged at intervals corresponding to the end surface of the valve flap 4 along the axial direction of the valve stem 2. A notch 21 is provided at the end of the guide surface 22 close to the sealing end opposite to the other guide surface 22. The notch 21 abuts against the end surface of the valve flap 4 along the axial direction of the valve stem 2. The valve stem 2 moves under the drive of the lifting device, thereby driving the valve flap 4 to complete the opening and sealing of the medium outlet 13.

[0030] In a further embodiment, the inclined surface 41 of the through hole of the valve disc 4 is inclined toward the sealing end of the valve disc 4, and the guide surface 22 of the valve stem 2 is inclined toward the sealing end along the axial direction corresponding to the inclined surface 41.

[0031] Specifically, the inclined surface 41 of the through hole of the valve flap 4 extends obliquely along the axial direction of the valve stem 2 toward the sealing end of the valve flap 4, and the guide surface 22 corresponds to the inclined surface 41 and is axially inclined toward the sealing end. In another implementation scheme, the inclined surface 41 of the through hole of the valve flap 4 extends obliquely along the axial direction of the valve stem 2 toward the sealing end away from the valve flap 4, and the guide surface 22 corresponds to the inclined surface 41 and is axially inclined away from the sealing end.

[0032] like Figure 3-Figure 5 As shown, the present invention further discloses a valve, including a valve body 1, wherein the valve switch assembly described in the above embodiment is arranged in the valve body 1, and the valve body 1 realizes opening and sealing of the valve through the valve switch assembly described in the above embodiment.

[0033] Specifically, the valve body 1 includes a lifting rod 5, which is connected to the valve stem 2 to drive the valve stem 2 to move up and down. The lifting rod 5 is driven to move up and down by the lifting drive mechanism 9. The end of the valve stem 2 connected to the lifting rod 5 is provided with a groove 23. The lifting rod 5 is in the groove 23 and connected to the valve stem 2, driving the valve stem 2 to move up and down at the same time. During the lifting and lowering process of the valve stem 2, the guide surface 22 abuts against the inclined surface 41 to push the valve disc 4 to move, thereby completing the opening and sealing of the medium outlet 13. The lifting drive mechanism 9 can be driven by pneumatic, manual, hydraulic, or other existing driving mechanisms or devices that can achieve lifting.

[0034] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the present invention also discloses a reversing valve, including a valve body 1, in which the valve switch assembly described in the above embodiment, a medium inlet 12 and at least two medium outlets 13 are provided, and the valve flap 4 is rotatable in the valve body 1 and can be rotated to the corresponding medium outlet 13 to close the medium outlet 13.

[0035] Specifically, the valve body 1 includes an upper valve body 14 and a lower valve body 15, the upper valve body 14 also includes an upper shaft sleeve 141, the lower valve body 15 includes a lower shaft sleeve 151, the valve stem 2 is located in the upper shaft sleeve 141 and the lower shaft sleeve 151, the valve stem 2 and the shaft sleeve are coaxially arranged, the valve flap 4 is rotatably arranged between the upper valve body 14 and the lower valve body 15, the upper valve body 14 and the lower valve body 15 constitute at least two medium outlets 13, taking the example of two medium outlets 13, including a first medium outlet 131 and a second medium outlet 132, the valve flap 4 is connected to the valve flap 4 through an existing rotating device or a rotating motor, etc., to drive the valve flap 4 to rotate, and at the first medium outlet 131 and the second medium outlet 132 are switched, and the corresponding medium outlet 13 is sealed. After the medium outlet 13 is switched, the previous medium outlet 13 is completely sealed. The cross section of the valve flap 4 is T-shaped, and the through hole is located at the sealing end away from the valve flap 4, and is tilted along its rotation axis. The valve stem 2 is columnar and movably arranged in the valve body 1. A guide surface 22 is provided on the valve stem 2, and the guide surface 22 passes through the through hole and is located in the through hole. The guide surface 22 is arranged corresponding to the inclined surface 41. The valve stem 2 moves along the rotation axis direction of the valve flap 4, and the inclined surface 41 of the through hole abuts against the guide surface 22 of the valve stem 2, so as to push the valve flap 4 to achieve sealing and opening.

[0036] In a further embodiment, the through hole of the valve flap 4 is coaxially arranged with the rotation axis thereof, and the valve stem 2 is coaxially arranged with the rotation axis of the valve flap 4 .

[0037] Specifically, the rotation axis of the valve flap 4 is at an end away from the sealing end, the axis of the through hole of the valve flap 4 is coaxially arranged with the rotation axis of the valve flap 4, the valve stem 2 is partially inserted in the through hole along the axial direction of the rotation axis, and its axis is coaxially arranged with the rotation axis, the cross-section of the through hole is square, and the rotating rod 7 drives the valve stem 2 to rotate, thereby driving the valve flap 4 to rotate, completing the conversion at the medium outlet 13.

[0038] In a further embodiment, a hanging plate 6 is provided at one end of the valve stem 2 along the axial direction, and the hanging plate 6 is connected between the valve stem 2 and the lifting rod 5 .

[0039] Specifically, a groove 23 is provided at one end of the valve stem 2 along the axial direction, and the groove 23 is coaxially arranged with the valve stem 2. One end of the lifting rod 5 is in the groove 23, and the other end is connected to the lifting drive mechanism 9. A protrusion 51 extends perpendicularly to the axial direction of the valve stem 2 at the end portion in the groove 23. The hanging plate 6 is on the upper side of the protrusion 51 and is connected to the inner wall of the groove 23 of the valve stem 2. In one embodiment, the end of the lifting rod 5 in the groove 23 is arranged close to the inner peripheral side wall of the groove 23, and a protrusion 51 extends from its end portion toward the outer peripheral direction of the groove 23. The hanging plate 6 is arranged at the end portion of the protrusion 51 in the axial direction, is on the upper side of the concave platform or abuts against the upper side of the concave platform, and the protrusion 51 is between the hanging plate 6 and the valve stem 2. The hanging plate 6 is fixedly connected to the outer peripheral side wall of the groove 23. In another embodiment, the end of the lifting rod 5 in the annular groove is arranged close to the outer peripheral side wall of the groove 23, and a protrusion 51 extends from its end portion toward the inner peripheral side wall of the groove 23. The hanging plate 6 is The protrusion 51 is arranged on one side of the end face of the protrusion 51 along the axial direction, is located on the upper side of the end face or abuts against the upper side of the end face, the protrusion 51 is between the hanging plate 6 and the valve stem 2, the hanging plate 6 is fixedly connected to the inner peripheral side wall of the annular groove, the lifting rod 5 moves along the axial direction, drives the hanging plate 6 to move, and then drives the valve stem 2 to move, during the lifting process of the lifting rod 5, the guide surface 22 abuts and squeezes the inclined surface 41 to push the medium outlet 13 to open and close, in a preferred embodiment, the groove 23 is an annular groove, in a more preferred embodiment, the hanging plate 6 and the valve stem 2 are integrally arranged, the protrusion 51 of the lifting rod 5 can be rotatably arranged on the lifting rod 5, the protrusion 51 can be the claw of the lifting rod 5, after the lifting rod 5 is in the groove 23, the protrusion 51 rotates and is located on the side of the hanging plate 6 close to the bottom of the groove 23, so that the hanging plate 6 is driven to complete the lifting and moving during the lifting process, and the lifting drive mechanism 9 can be driven by pneumatic, manual, hydraulic, or other existing driving mechanisms or devices that can achieve lifting.

[0040] In a further embodiment, a rotary drive mechanism 10 is connected to the valve body 1 , and the rotary drive mechanism 10 drives the valve flap 4 to switch between the medium outlets 13 .

[0041] Specifically, in one implementation scheme, the rotary drive mechanism 10 is connected to the valve stem 2, and the valve stem 2 is provided with a socket 24 at one end along the axis, and the rotary rod 7 of the rotary drive mechanism 10 is inserted into the socket 24 and connected to the valve stem 2, and the end of the rotary rod 7 is spaced apart from the bottom end of the socket 24 and is connected by an elastic component, which does not affect the state of the rotary rod 7 during the lifting and lowering process of the valve stem 2. The connection between the rotary rod 7 and the valve stem 2 can be through a spline connection, and the valve disc 4 is driven to rotate while the valve stem 2 rotates, and the valve disc 4 is switched between the first medium outlet 131 and the second medium outlet 132. In another implementation scheme, the rotary rod 7 of the rotary drive mechanism 10 is sleeved on the outer periphery of the valve stem 2 and is directly connected to the valve disc 4 to drive the valve disc 4 to rotate. The rotary drive mechanism 10 can be driven by pneumatic, manual, hydraulic or other existing driving mechanisms or devices that can realize the rotation function.

[0042] In a further embodiment, one end of the lifting rod 5 in the annular groove is slidably connected to the bottom of the groove 23, and the hanging plate 6 is slidably connected to one end of the protruding portion 51 of the lifting rod 5 along the axial direction.

[0043] In a further implementation scheme, a wear-resistant ring 3 is further provided between the valve disc 4 and the valve body 1, and a ring sleeve is provided at one end of the shaft sleeve close to the valve disc 4. The wear-resistant ring 3 is arranged on the ring sleeve in a circular ring shape and abuts against two end faces of the valve disc 4 along the axial direction. The valve body 1 and the wear-resistant ring 3 limit the movement of the valve disc 4 in the axial direction. The wear-resistant ring 3 increases the service life of the valve disc 4 and avoids wear between the valve disc 4 and the valve body 1 during use, which affects the use.

[0044] In the embodiment of the present invention, the sealing end of the valve disc 4 abuts against the medium outlet 13. Driven by the lifting drive mechanism 9, the lifting rod 5 drives the valve stem 2 to move upward or downward. The moving direction depends on the inclination direction of the guide surface 22 of the valve stem 2 and the inclined surface 41 of the valve disc 4. The guide surface 22 of the valve stem 2 abuts against the inclined surface 41 of the valve disc 4, and the sealing end of the valve disc 4 is driven to move in the axial direction under the force of the inclined surface to complete the opening action of the valve disc 4. After the valve disc 4 is opened, the rotary drive mechanism 10 drives the rotary rod 7 to rotate, and at the same time, the rotary drive mechanism 10 drives the rotary rod 7 to rotate. The valve stem 2 is driven to rotate, and the valve stem 2 drives the valve disc 4 to rotate. During the rotation, the protrusion 51 of the lifting rod 5 is slidably connected with the valve stem 2 and the hanging plate 6 at both ends along the axial direction, so the lifting rod 5 and the lifting drive mechanism 9 remain stationary, and the valve disc 4 rotates from the first medium outlet 131 to the second medium outlet 132. After the rotation is completed, under the action of the lifting drive mechanism 9, the lifting rod 5 drives the valve stem 2 to move upward or downward, and under the action of the guide surface 22 and the inclined surface 41, drives the valve disc 4 to move toward the direction of the second medium outlet 132 to achieve sealing.

[0045] In this embodiment, the rotation drive mechanism 10 and the lifting drive mechanism 9 of the three-way valve are at the same end. The lifting drive mechanism 9 is provided with a rotation drive mechanism 10 at one end along the axial direction, and a valve neck 8 at the other end. The lifting rod 5 and the rotating rod 7 are in the valve neck 8, and the other end of the valve neck 8 is connected to the valve body 1. The rotation drive mechanism 10 is provided with a limit device 11 on one side along the axial direction. The limit device 11 is not limited to the specific structure and fixing method. The limit device 11 includes an indicator block and a limit block. The limit block is used to limit the initial and end positions of the rotation drive mechanism 10. The indicator block rotates synchronously with the rotating rod 7 to indicate the switched outlet direction.

[0046] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A valve switch assembly, characterized in that: include A valve flap (4) is movably disposed in the valve body (1) and corresponds to the medium outlet (13); The valve stem (2) is connected to the valve disc (4), and the valve disc (4) is pushed up and down by the valve stem (2) to move the switch medium outlet (13).

2. A valve switch assembly according to claim 1, characterized in that: The valve flap (4) is provided with a through hole, the valve stem (2) is provided with a guide surface (22), the guide surface (22) passes through the through hole and is located in the through hole, the through hole extends obliquely along the axial direction of the valve stem (2) to form an inclined surface (41), and during the lifting process of the valve stem (2), the guide surface (22) abuts against the inclined surface (41) to push the valve flap (1) to open or seal the medium outlet (13).

3. A valve switch assembly according to claim 2, characterized in that: At least one end of the guide surface (21) along the axial direction of the valve stem (2) is provided with a notch.

4. A valve switch assembly according to claim 2 or 3, characterized in that: The inclined surface (41) of the through hole of the valve disc (4) is inclined toward the sealing end of the valve disc (4), and the guide surface (22) of the valve stem (2) is inclined toward the sealing end along the axial direction corresponding to the inclined surface (41).

5. A valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve switch assembly as described in any one of claims 1 to 4.

6. A reversing valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve switch assembly according to any one of claims 1 to 4 and at least two medium outlets (13); the valve flap (4) is rotatably located in the valve body (1) and can be rotated to a position corresponding to the medium outlet (13) to close the medium outlet (13); Preferably, the reversing valve comprises A lifting rod (5) is used to drive the valve stem (2) to move up and down along the axial direction; The rotating rod (7) is used to drive the valve stem (2) to rotate, and the valve stem (2) drives the valve disc (4) to rotate.

7. A reversing valve according to claim 6, characterized in that: The lifting rod (5) is connected to the valve stem (2) in a lifting manner, and the rotating rod (7) is connected to the valve stem (2) in a rotating manner; The lifting rod (5) is sleeved on the outer circumference of the rotating rod (7).

8. A reversing valve according to claim 7, characterized in that: The lifting rod (5) is connected to the valve stem (2) in a relatively rotatable manner; Preferably, a groove (23) is provided at one end of the valve stem (2) close to the lifting rod (5), a protrusion (51) is extended toward the outer circumference at one end of the lifting rod (5) extending into the groove (23), a hanging plate (6) is provided at the opening of the groove (23), the hanging plate (6) is fixedly connected to the valve stem (2), the hanging plate (6) is located on the moving path of the protrusion (51), and the hanging plate (6) is driven to move up and down by the protrusion (51) of the lifting rod (5); More preferably, the hanging plate (6) and the valve stem (2) are integrally formed.

9. A reversing valve according to claim 8, characterized in that: The groove (23) is an annular groove, and a plug hole (24) is coaxially arranged in the annular groove. The rotating rod (7) is inserted into the plug hole (24).

10. A reversing valve according to any one of claims 6 to 9, characterized in that: The valve flap (4) is provided with wear-resistant rings (3) on both sides along the axial direction of the valve stem (2).

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