A simple electro-hydraulic control valve

Abstract

This utility model relates to a simple electro-hydraulic control valve, including a valve body and a valve core. The valve core is slidably disposed within the valve cavity of the valve body. A return oil hole and an inlet oil hole are provided on the lower side of the valve body, leading into the valve cavity. The valve body also has a secondary return oil hole connecting the valve cavity to the return oil hole. The inlet oil hole is located between the return oil hole and the secondary return oil hole. An oil passage hole A and an oil passage hole B are provided on the upper side of the valve body, leading into the valve cavity. Two sealing rings are fixedly connected to the valve core, forming a sealing contact with the inner wall of the valve cavity. A control chamber is provided on the upper left side of the valve cavity. A control lever extending into the control chamber is connected to the valve core. An electric drive mechanism for driving the control lever to slide left and right is provided on the upper left side of the valve body. A manual lever is connected to the control lever. A lever through groove is provided on the upper side of the control chamber of the valve body, through which the upper end of the manual lever extends. This utility model has a simple structure, low cost, and can be driven by both electric and manual means.

Description

Technical Field

[0001] This utility model relates to the field of liquid control valve technology, and in particular to an electro-hydraulic control valve with a simple structure. Background Technology

[0002] An electro-hydraulic valve is a type of valve that uses electrical signals to control a hydraulic system. It has the function of changing the flow direction of hydraulic oil and is an important device in a hydraulic system for changing the flow direction of liquid.

[0003] Existing electro-hydraulic valves generally use coils and electromagnets to control the valve core to move left and right, thereby changing the flow direction of the liquid. They are generally only electrically controlled and do not have a manual operation mechanism. However, in some application scenarios, manual operation may be required. Therefore, some existing electro-hydraulic valves have added a manual operation mechanism. However, these electro-hydraulic valves with manual operation function are generally very complex in structure, and the cost is relatively high. In view of the above problems, this application makes an improvement and proposes an electro-hydraulic valve with a simple structure, low cost, and a manual operation mechanism. Utility Model Content

[0004] This invention proposes a simple electro-hydraulic control valve with a simple structure and low cost. It can be driven automatically by electric motor or manually controlled, thus solving the above-mentioned problems existing in the use of the prior art.

[0005] The technical solution of this utility model is implemented as follows: A simple electro-hydraulic control valve includes a valve body and a valve core. The valve body has an inner cavity, and the valve core slides left and right within the inner cavity. The lower side of the valve body has an inlet and a return oil hole leading into the inner cavity. The valve body also has a secondary return oil hole connecting the inner cavity to the return oil hole. The inlet oil hole is located between the return oil hole and the secondary return oil hole. The upper side of the valve body has an oil passage hole A and an oil passage hole B leading into the inner cavity. Oil passage hole A is located between the return oil hole and the inlet oil hole. The oil passage B is located between the auxiliary oil return hole and the oil inlet hole. Two sealing rings are fixedly connected to the valve core. The sealing rings are used to form a sealing contact with the inner wall of the valve cavity. The valve body has a control chamber on the left side of the valve cavity. The valve core is connected to a control rod that extends into the control chamber. The left side of the valve body is provided with an electric drive mechanism for driving the control rod to slide left and right. A manual lever is connected to the control rod. The valve body has a lever through groove on the upper side of the control chamber. The upper end of the manual lever extends out of the lever through groove.

[0006] Preferably, a connecting slot is provided on the left end of the control lever, the middle part of the manual lever is rotatably connected in the connecting slot, and the lower end of the manual lever is rotatably connected to the lower side wall of the control cavity.

[0007] Preferably, the manual lever is provided with a position reference line, and the valve body is provided with a valve status mark on one side of the lever through groove.

[0008] Preferably, the electric drive mechanism and the control lever are detachably connected.

[0009] Preferably, the electric drive mechanism is an electric cylinder.

[0010] Preferably, an iron-nickel alloy block is fixedly connected to the output shaft of the electric cylinder, and an electromagnet is fixedly connected to the left end of the control lever.

[0011] Preferably, the valve body has a wiring port in the middle of the control chamber, the wiring port is provided with a power plug, and the power plug is provided with a wire connected to the electromagnet.

[0012] In summary, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model can drive the control lever to slide left and right through an electric drive mechanism, or it can be controlled by a manual lever to slide left and right. When the control lever is driven, it drives the valve core to move synchronously. The valve core connects the oil inlet hole with the oil passage hole A or oil passage hole B through the sealing ring, thereby switching the flow direction of the liquid. This utility model has a simple structure, low cost, and can be driven automatically by electric motor or manually controlled, making it suitable for various application scenarios. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the structure when observed from below;

[0017] Figure 3 This is a schematic diagram of the structure of this utility model after the valve body has been removed;

[0018] Figure 4 This is a perspective structural diagram of the valve body in this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of this utility model when the oil inlet hole and the oil passage hole A are connected;

[0020] Figure 6 This is a schematic diagram of the structure of this utility model when the sealing ring blocks the oil passage hole A and the oil passage hole B;

[0021] Figure 7 This is a schematic diagram of the structure of this utility model when the oil inlet hole and the oil passage hole B are connected.

[0022] In the diagram: 1. Valve body; 11. Valve cavity; 12. Oil inlet; 13. Oil return hole; 14. Secondary oil return hole; 15. Oil passage hole A; 16. Oil passage hole B; 17. Control chamber; 18. Lever through groove; 19. Wiring port; 2. Valve core; 21. Sealing ring; 22. Control lever; 23. Connecting slot; 3. Manual lever; 31. Position reference line; 4. Electric cylinder; 41. Iron-nickel alloy block; 5. Electromagnet; 51. Power connector; 52. Wire; 6. Valve status indicator. Detailed Implementation

[0023] The following will refer to the appendix in the embodiments of this utility model. Figure 1-7 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Example:

[0025] like Figures 1 to 7As shown, this utility model discloses a simple electro-hydraulic control valve, including a valve body 1 and a valve core 2. A valve cavity 11 is formed inside the valve body 1, and the valve core 2 is slidably disposed within the valve cavity 11. An oil inlet hole 12 and a return hole 13 are formed on the lower side of the valve body 1, leading into the valve cavity 11. A secondary return hole 14 is also formed on the valve body 1, connecting the valve cavity 11 to the return hole 13. The oil inlet hole 12 is located between the return hole 13 and the secondary return hole 14. Additionally, an oil passage hole A15 and an oil passage hole B16 are formed on the upper side of the valve body 1, leading into the valve cavity 11. The oil passage hole A15 is located between the return hole 13 and the oil inlet hole 12, and the oil passage hole B16 is located between the secondary return hole 14 and the oil inlet hole 12. Two sealing rings 21 are fixedly connected to the valve core 2. The sealing rings 21 are used for... The valve core 2 forms a sealed contact with the inner wall of the valve cavity 11. When the valve core 2 slides left and right, it drives the sealing ring 21 to move in the valve cavity 11. The sealing ring 21 changes the connection between the oil inlet hole 12 and the oil passage hole A15 or the oil passage hole B16, thereby switching the flow direction of the liquid. In this utility model, the valve body 1 has a control chamber 17 on the left side of the valve cavity 11. The valve core 2 is connected to a control rod 22 that extends into the control chamber 17. The valve body 1 has an electric drive mechanism for driving the control rod 22 to slide left and right. The electric drive mechanism is specifically an electric cylinder 4, which is detachably connected to the control rod 22. In addition, a manual lever 3 is also connected to the control rod 22. The valve body 1 has a lever through groove 18 on the upper side of the control chamber 17. The upper end of the manual lever 3 passes through the lever through groove 18.

[0026] The specific structure of the manual lever 3 is as follows: a connecting slot 23 is provided on the left end of the control lever 22, the middle part of the manual lever 3 is rotatably connected in the connecting slot 23, and the lower end of the manual lever 3 is rotatably connected to the lower side wall of the control cavity 17.

[0027] To help users understand the position of the valve core 2, a position reference line 31 is provided on the manual lever 3, and a valve status mark 6 is provided on one side of the lever through groove 18 on the valve body 1. The valve status mark 6 is specifically A, OFF, and B, where A and B are located on the left and right sides respectively, and OFF is located in the middle.

[0028] The specific structure of the detachable connection between the electric cylinder 4 and the control lever 22 is as follows: an iron-nickel alloy block 41 is fixedly connected to the output shaft of the electric cylinder 4, and an electromagnet 5 is fixedly connected to the left end of the control lever 22. In addition, a wiring port 19 is provided in the middle of the control chamber 17 of the valve body 1. A power plug 51 is provided on the wiring port 19, and a wire 52 connected to the electromagnet 5 is provided on the power plug 51.

[0029] This utility model is used to connect the oil tank and the hydraulic system. When using electric control, the electromagnet 5 is energized, connecting the control lever 22 to the electric cylinder 4. Therefore, the electric cylinder 4 can directly control the valve core 2 to move left and right via the control lever 22. When manual control is required, the electromagnet 5 is de-energized, and the output shaft of the electric cylinder 4 moves to the leftmost position. At this time, directly moving the manual lever 3 allows the control lever 22 to slide left and right. When the control lever 22 is moved, it synchronously drives the valve core 2 to move left and right. When the manual lever 3 is moved to the left, so that the position reference line 31 on the manual lever 3 corresponds to A on the valve status mark 6, ... Figure 5 As shown, the two sealing rings 21 on the valve core 2 are located between the return oil hole 13 and the through oil hole A15, and between the through oil hole B16 and the inlet oil hole 12, respectively. At this time, the inlet oil hole 12 is connected to the through oil hole A15, and the through oil hole B16 is connected to the auxiliary return oil hole 14. The oil in the reservoir enters from the inlet oil hole 12, reaches the valve cavity 11, and then enters the hydraulic system from the through oil hole A15. The oil in the hydraulic system enters the valve cavity 11 from the through oil hole B16, then enters the auxiliary return oil hole 14, and leaves from the return oil hole 13 back to the reservoir. When the manual lever 3 is moved to OFF, as shown... Figure 6 As shown, at this time, the two sealing rings 21 on the valve core 2 are located at the positions of oil passage A15 and oil passage B16 respectively, blocking oil passage A15 and oil passage B16. When the manual lever 3 is moved to the rightmost position, so that the position reference line 31 on the manual lever 3 corresponds to B on the valve status mark 6, as shown... Figure 7 As shown, the two sealing rings 21 on the core are located between the oil passage hole A15 and the oil inlet hole 12, and between the oil passage hole B16 and the auxiliary oil return hole 14, respectively. At this time, the oil inlet hole and the oil passage hole B16 are connected, and the oil return hole 13 is connected to the oil passage hole A15.

[0030] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", 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 limiting the scope of protection of this utility model.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A simple electro-hydraulic control valve, comprising a valve body and a valve core, characterized in that: The valve body has an inner cavity, and the valve core slides left and right within the inner cavity. The lower side of the valve body has a return oil hole and an inlet oil hole leading into the inner cavity. The valve body also has a secondary return oil hole connecting the inner cavity to the return oil hole. The inlet oil hole is located between the return oil hole and the secondary return oil hole. The upper side of the valve body has an oil passage hole A and an oil passage hole B leading into the inner cavity. Oil passage hole A is located between the return oil hole and the inlet oil hole, and oil passage hole B is located between the secondary return oil hole and the inlet oil hole. Two sealing rings are fixedly connected to the valve core, forming a sealing contact with the inner wall of the inner cavity. The valve body has a control chamber on the upper left side of the inner cavity. A control lever extending into the control chamber is connected to the valve core. An electric drive mechanism for driving the control lever to slide left and right is provided on the upper left side of the valve body. A manual lever is connected to the control lever. A lever through groove is provided on the upper side of the control chamber, and the upper end of the manual lever extends out of the lever through groove.

2. The electro-hydraulic control valve with a simple structure according to claim 1, characterized in that: A connecting slot is provided on the left end of the control lever, the middle part of the manual lever is rotatably connected in the connecting slot, and the lower end of the manual lever is rotatably connected to the lower side wall of the control cavity.

3. The electro-hydraulic control valve with a simple structure according to claim 2, characterized in that: The manual lever is provided with a position reference line, and the valve body is provided with a valve status mark on one side of the lever through groove.

4. The electro-hydraulic control valve with a simple structure according to claim 1, characterized in that: The electric drive mechanism and the control lever are detachably connected.

5. The electro-hydraulic control valve with a simple structure according to claim 4, characterized in that: The electric drive mechanism is an electric cylinder.

6. The electro-hydraulic control valve with a simple structure according to claim 5, characterized in that: An iron-nickel alloy block is fixedly connected to the output shaft of the electric cylinder, and an electromagnet is fixedly connected to the left end of the control lever.

7. The electro-hydraulic control valve with a simple structure according to claim 6, characterized in that: The valve body has a wiring port in the middle of the control chamber, and the wiring port is equipped with a power plug, which is connected to an electromagnet by a wire.

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