Two-position five-way reversing valve

Abstract

The utility model relates to the technical field of valves, and discloses a two-position five-way reversing valve which comprises a valve body and a valve core, a control cavity, a matching cavity, a valve cavity, a first working port, a second working port, a pressure material port, a first material return port and a second material return port are arranged in the valve body, and the first working port, the second working port, the pressure material port, the first material return port and the second material return port are communicated with the valve cavity. The control cavity is connected with a control liquid source, the valve element comprises a control rod, an elastic piece and a valve rod, one end of the control rod extends into the control cavity, the other end of the control rod penetrates through the matching cavity and is connected with the first end of the valve rod, one end of the elastic piece is connected with the control rod, the other end of the elastic piece is connected with the matching cavity, and a leakage observation opening is formed in the matching cavity. The valve rod is arranged in the valve cavity in a sliding mode, and a first annular circulation groove and a second annular circulation groove are formed in the valve rod in a spaced mode. The integral structure is simple, the reversing action can be quickly carried out through the matching of the elastic piece and the control cavity, different fluids are prevented from being mixed, and the sealing failure can be known in time.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a two-position five-way reversing valve. Background Technology

[0002] A directional control valve is a type of valve with two or more flow patterns and two or more fluid inlets and outlets. It can change the direction of fluid flow as needed. When the directional control valve is working, it is driven by external force to move the valve core and valve stem, connecting or disconnecting different fluid inlets and outlets, thus achieving the purpose of changing the flow direction. However, existing two-position five-way directional control valves usually have complex structures, high manufacturing costs, slow response speeds, and are prone to internal fluid leakage. Utility Model Content

[0003] The purpose of this utility model is to provide a two-position five-way reversing valve with a simple overall structure. Through the cooperation of the elastic element and the control chamber, it can quickly perform reversing action, avoid cross-contamination between different fluids, and promptly detect sealing failures.

[0004] To achieve the above objectives, this utility model provides a two-position five-way reversing valve, including a valve body and a valve core. The valve body has a control chamber, a mating chamber, a valve chamber, and a first working port, a second working port, a pressure material port, a first return port, and a second return port communicating with the valve chamber. The mating chamber is located between the control chamber and the valve chamber, and the control chamber is connected to a control liquid source. The valve core includes a control rod, an elastic element, and a valve stem. One end of the control rod extends into the control chamber, and the other end of the control rod passes through the mating chamber and is connected to the first end of the valve stem. One end of the elastic element is connected to the control rod, and the other end of the elastic element is connected to the mating chamber. A leakage observation port is provided on the mating chamber. The valve stem is slidably disposed in the valve chamber. The valve stem is provided with a first annular flow groove and a second annular flow groove spaced apart. A first sealing ring is provided on the control rod, and a second sealing ring and a third sealing ring are respectively provided on both ends of the valve stem. A fourth sealing ring is provided on the valve stem located between the first annular flow groove and the second annular flow groove.

[0005] When control liquid is introduced into the control chamber, the control rod moves toward one side of the valve chamber, the elastic element is compressed, the pressure port is connected to the first working port through the first annular flow groove, the second working port is connected to the first return port through the second annular flow groove, and the second return port is isolated from the valve chamber.

[0006] When the control chamber is not supplied with control liquid, the control rod moves toward the side away from the valve chamber under the restoring force of the elastic element. The pressure port is connected to the second working port through the second annular flow groove, the first working port is connected to the second return port through the first annular flow groove, and the first return port is isolated from the valve chamber.

[0007] As a preferred embodiment of this utility model, the valve body is provided with a leakage observation port at its end, which communicates with the valve cavity, and the leakage observation port is directly opposite the end face of the valve stem.

[0008] As a preferred embodiment of this utility model, the leakage observation port is inclined from the side closer to the control cavity to the side closer to the mating cavity.

[0009] As a preferred embodiment of this utility model, multiple leakage observation ports are provided around the circumference of the mating cavity, and the leakage observation ports are located on the side of the mating cavity closer to the control cavity.

[0010] As a preferred embodiment of this utility model, the elastic element is a spring, a limiting baffle is provided in the middle of the control rod, the limiting baffle is located in the mating cavity, the elastic element is sleeved on the control rod, one end of the elastic element is connected to the limiting baffle, and the other end of the elastic element is connected to the end of the mating cavity near the valve cavity.

[0011] As a preferred embodiment of this utility model, there are two fourth sealing rings, one of which is close to the first annular flow groove, and the other of which is close to the second annular flow groove.

[0012] As a preferred embodiment of this utility model, the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all O-rings.

[0013] Compared with the prior art, the two-position five-way directional valve of this utility model has the following advantages:

[0014] This invention utilizes a control liquid source to introduce control liquid into the control chamber. When this liquid is introduced, the control rod and valve stem move towards one side of the valve chamber, simultaneously compressing the elastic element. The two-position five-way directional valve is then in operation. The working fluid within the valve chamber can be either liquid or gas. The pressure port is connected to the first working port via a first annular flow groove, and the second working port is connected to the first return port via a second annular flow groove. In the non-operating state, no control liquid is introduced into the control chamber. The control rod and valve stem reset under the restoring force of the elastic element. The pressure port is connected to the second working port via the second annular flow groove, and the first working port is connected to the second return port via the first annular flow groove. Furthermore, a mating cavity is provided between the control chamber and the valve chamber. A leakage observation port on the mating cavity allows for timely detection of sealing failures. Even in the event of a sealing failure, the control liquid in the control chamber will not cross-contaminate with the working fluid in the valve chamber, improving the stability of the directional valve. The overall structure is simple, and the cooperation between the elastic element and the control chamber enables rapid directional switching. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0016] Figure 1 A schematic diagram of the structure of a two-position five-way directional valve in working state provided by this utility model;

[0017] Figure 2 This utility model provides a structural schematic diagram of a two-position five-way directional valve in its non-working state.

[0018] In the figure, valve body 10; control chamber 11; mating chamber 12; leakage observation port 121; valve cavity 13; first working port 14; second working port 15; pressure feed port 16; first return port 17; second return port 18; leakage observation port 19; valve core 20; control rod 21; limit baffle 211; elastic element 22; valve stem 23; first annular flow groove 231; second annular flow groove 232; first sealing ring 24; second sealing ring 25; third sealing ring 26; fourth sealing ring 27. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figures 1 to 2 As shown, a preferred embodiment of the present invention provides a two-position five-way directional valve, comprising a valve body 10 and a valve core 20. The valve body 10 contains a control chamber 11, a mating chamber 12, a valve chamber 13, and a first working port 14, a second working port 15, a pressure material port 16, a first return port 17, and a second return port 18 communicating with the valve chamber 13. The mating chamber 12 is located between the control chamber 11 and the valve chamber 13. The control chamber 11 is connected to a control fluid source. The valve core 20 includes a control rod 21, an elastic element 22, and a valve stem 23. One end of the control rod 21 extends into the control chamber 11, and the other end of the control rod 21 passes through the mating chamber 12 and connects with the valve stem. The first end of valve stem 23 is connected to the control rod 21, and the other end of the elastic element 22 is connected to the mating cavity 12. The mating cavity 12 is provided with a leakage observation port 121. Valve stem 23 is slidably disposed in valve cavity 13. Valve stem 23 is provided with a first annular flow groove 231 and a second annular flow groove 232 spaced apart. A first sealing ring 24 is provided on the control rod 21. A second sealing ring 25 and a third sealing ring 26 are provided on both ends of valve stem 23, and a fourth sealing ring 27 is provided on valve stem 23 between the first annular flow groove 231 and the second annular flow groove 232.

[0022] When control liquid is introduced into the control chamber 11, the control rod 21 moves toward the side of the valve chamber 13, the elastic element 22 is compressed, the pressure port 16 is connected to the first working port 14 through the first annular flow groove 231, the second working port 15 is connected to the first return port 17 through the second annular flow groove 232, and the second return port 18 is isolated from the valve chamber 13.

[0023] When the control chamber 11 is not supplied with control liquid, the control rod 21 moves toward the side away from the valve chamber 13 under the restoring force of the elastic element 22. The pressure port 16 is connected to the second working port 15 through the second annular flow groove 232, the first working port 14 is connected to the second return port 18 through the first annular flow groove 231, and the first return port 17 is isolated from the valve chamber 13.

[0024] When the control liquid is introduced into the control chamber 11 by the control liquid source, the control rod 21 and valve rod 23 move toward one side of the valve chamber 13, and the elastic element 22 is compressed. The two-position five-way reversing valve is in the working state. The working fluid in the valve chamber 13 can be either liquid or gas. The pressure port 16 is connected to the first working port 14 through the first annular flow groove 231, and the second working port 15 is connected to the first return port 17 through the second annular flow groove 232. In the non-working state, no control liquid is introduced into the control chamber 11, and the control rod 21 and valve rod 23 are reset under the reset force of the elastic element 22. The pressure port 16 is connected to the second working port 15 through the second annular flow groove 232, and the first working port 14 is connected to the second return port 18 through the first annular flow groove 231. Moreover, a mating chamber 12 is provided between the control chamber 11 and the valve chamber 13, and the leakage observation port 121 on the mating chamber 12 can detect the sealing failure in time. Even if the sealing failure occurs, the control fluid in the control chamber 11 will not cross-contaminate with the working fluid in the valve chamber 13, thus improving the stability of the directional valve. The overall structure is simple, and the directional valve can quickly perform the directional action through the cooperation of the elastic element 22 and the control chamber 11.

[0025] For example, the valve body 10 is provided with a leakage observation port 19 at the end, which communicates with the valve cavity 13. The leakage observation port 19 is directly opposite the end face of the valve stem 23. In this way, when the rear end seal of the valve cavity 13 fails and working fluid leakage occurs, it can be detected in time and effectively handled and controlled.

[0026] Specifically, the leakage observation port 121 is inclined from the side near the control cavity 11 to the side near the mating cavity. Furthermore, multiple leakage observation ports 121 are arranged around the circumference of the mating cavity 12. The leakage observation ports 121 are located on the side of the mating cavity 12 near the control cavity 11, so that leakage can be discharged from the leakage observation port 121, and the failure of the reversing valve seal can be detected in time.

[0027] For example, the elastic element 22 is a spring, and a limiting baffle 211 is provided in the middle of the control rod 21. The limiting baffle 211 is located in the mating cavity 12. The elastic element 22 is sleeved on the control rod 21. One end of the elastic element 22 is connected to the limiting baffle 211, and the other end of the elastic element 22 is connected to the end of the mating cavity 12 near the valve cavity 13, which facilitates the positioning and fixing of the elastic element 22, and the reversing valve can quickly respond to reverse.

[0028] For example, there are two fourth sealing rings 27, one of which is close to the first annular flow groove 231, and the other of which is close to the second annular flow groove 232, to ensure a good sealing effect for the working fluid.

[0029] Furthermore, the first sealing ring 24, the second sealing ring 25, the third sealing ring 26 and the fourth sealing ring 27 are all O-rings, which ensures good sealing performance of the control chamber 11 and the valve chamber 13 and prevents leakage and oil cross-contamination.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A two-position five-way directional valve, characterized in that, The device includes a valve body and a valve core. The valve body comprises a control chamber, a mating chamber, a valve chamber, and a first working port, a second working port, a pressure feed port, a first return port, and a second return port communicating with the valve chamber. The mating chamber is located between the control chamber and the valve chamber, and the control chamber is connected to a control liquid source. The valve core includes a control rod, an elastic element, and a valve stem. One end of the control rod extends into the control chamber, and the other end passes through the mating chamber and connects to the first end of the valve stem. One end of the elastic element is connected to the control rod, and the other end is connected to the mating chamber. A leakage observation port is provided on the mating chamber. The valve stem is slidably disposed within the valve chamber. A first annular flow groove and a second annular flow groove are provided on the valve stem at intervals. A first sealing ring is provided around the control rod, and a second sealing ring and a third sealing ring are respectively provided around both ends of the valve stem. A fourth sealing ring is provided on the valve stem between the first annular flow groove and the second annular flow groove. When control liquid is introduced into the control chamber, the control rod moves toward one side of the valve chamber, the elastic element is compressed, the pressure port is connected to the first working port through the first annular flow groove, the second working port is connected to the first return port through the second annular flow groove, and the second return port is isolated from the valve chamber. When the control chamber is not supplied with control liquid, the control rod moves toward the side away from the valve chamber under the restoring force of the elastic element. The pressure port is connected to the second working port through the second annular flow groove, the first working port is connected to the second return port through the first annular flow groove, and the first return port is isolated from the valve chamber.

2. The two-position five-way directional valve as described in claim 1, characterized in that, The valve body has a leakage observation port at its end that communicates with the valve cavity, and the leakage observation port is directly opposite the end face of the valve stem.

3. The two-position five-way directional valve as described in claim 1, characterized in that, The leakage observation port is inclined from the side closer to the control cavity to the side closer to the mating cavity.

4. The two-position five-way directional valve as described in claim 1, characterized in that, Multiple leakage observation ports are provided around the circumference of the mating cavity, and the leakage observation ports are located on the side of the mating cavity closer to the control cavity.

5. The two-position five-way directional valve as described in claim 1, characterized in that, The elastic element is a spring, and a limiting baffle is provided in the middle of the control rod. The limiting baffle is located in the mating cavity. The elastic element is sleeved on the control rod. One end of the elastic element is connected to the limiting baffle, and the other end of the elastic element is connected to the end of the mating cavity near the valve cavity.

6. The two-position five-way directional valve as described in claim 1, characterized in that, The fourth sealing ring is provided in two parts: one fourth sealing ring is close to the first annular flow groove, and the other fourth sealing ring is close to the second annular flow groove.

7. The two-position five-way directional valve as described in claim 1, characterized in that, The first sealing ring, the second sealing ring, the third sealing ring, and the fourth sealing ring are all O-rings.

Images