An electrically controlled commutating control switch valve

Abstract

The utility model relates to a kind of electrically-controlled commutation control switch valve, involve closed hydraulic ram pump technical application field, valve body is equipped with inner cavity along the axial direction, valve core is equipped in inner cavity, valve core is symmetrically arranged with valve body center, and valve core is interconnected;Valve body is equipped with second oil channel and third oil channel, the side of second oil channel away from third oil channel is equipped with first oil channel, and the side of third oil channel away from second oil channel is equipped with fourth oil channel;The center of valve body is equipped with fifth oil channel;The both ends of valve body are respectively equipped with electromagnet, and one end of electromagnet is convex part, and convex part connects valve body, the inside of convex part is hollow, and armature is equipped in convex part, one end of armature is connected with electromagnet, and the other end of armature is arranged in spring seat, and spring is sleeved on the outside of armature;Cancel the original manual control complex connecting rod mechanism, simple structure, small installation space is occupied, using electrically-controlled electromagnet realizes commutation start-stop operation, reduces production labor intensity, provides operation efficiency.

Description

Technical Field

[0001] This utility model relates to the application of closed-loop hydraulic piston pump technology, and in particular to an electrically controlled directional control switch valve. Background Technology

[0002] In certain applications, closed-loop piston pumps require high-frequency reversing start-stop operations. Traditionally, this is achieved by manually controlling a double-linkage mechanism to indirectly control a rotary valve, which in turn controls the flow of oil in the servo piston chambers on both sides of the pump, thus achieving reversal. This mechanism, which uses a double-linkage mechanism and rotary valve to control the flow of oil in the servo piston pump, is complex, with numerous links, requiring ample installation space. Furthermore, the linkage mechanism requires a well-designed fulcrum to function correctly, necessitating high design and installation precision, leading to significant manufacturing costs. Additionally, the high frequency of reversing operations results in high operator workload, making it unsuitable for prolonged work and reducing production efficiency.

[0003] For the reasons mentioned above, it is urgent to develop an electrically controlled reversing control valve that can control closed-loop piston pumps to achieve high-frequency reversing start and stop, has a simple structure, low manufacturing and installation precision, low operator labor intensity, and can effectively reduce operation and maintenance costs. Utility Model Content

[0004] To address the problems of complex structure, high installation accuracy requirements, high manufacturing cost, high labor intensity and low production efficiency of traditional double-linkage + rotary valve mechanisms for high-frequency reversing start and stop of closed-loop pumps, an electrically controlled reversing control switching valve is proposed.

[0005] The technical solution of this utility model is: an electrically controlled reversing control switch valve, including a valve body, an inner cavity provided along the axial direction of the valve body, and two valve cores provided in the inner cavity. In the non-working state, the valve cores are symmetrically arranged around the center of the valve body and are connected to each other. The valve body is provided with a second oil passage and a third oil passage. The second oil passage is located on the outside of the valve core, and the third oil passage is located on the outside of another valve core. A first oil passage is provided on the side of the second oil passage away from the third oil passage, and a fourth oil passage is provided on the side of the third oil passage away from the second oil passage. A fifth oil passage is provided at the center of the valve body. Electromagnets are provided at both ends of the valve body. One end of the electromagnet is a protrusion that connects to the valve body. The protrusion is hollow and contains an armature. One end of the armature is connected to the electromagnet, and the other end of the armature passes through a spring seat. A spring is fitted on the outside of the armature, with one end of the spring abutting against the spring seat and the other end abutting against the electromagnet. The side of the spring seat away from the electromagnet abuts against the end of the valve core.

[0006] Preferably, the valve cores are interconnected via a connecting shaft.

[0007] Preferably, the protrusion of the electromagnet is provided with threads on the outside, and the protrusion is connected to the valve body through the threads.

[0008] Preferably, an O-ring is fitted at the connection point between the electromagnet protrusion and the valve body near the electromagnet.

[0009] Preferably, the protruding part of the electromagnet is provided with a limiting step inside.

[0010] The beneficial effects of this utility model are as follows: The electrically controlled reversing control switch valve provided by this utility model eliminates the original complex linkage mechanism of manual control, has a simple structure, occupies little installation space, and has moderate design and installation precision. Most importantly, it uses an electrically controlled electromagnet to realize the reversing start and stop operation, which greatly reduces the labor intensity of production and improves the work efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the electrically controlled directional control switch valve of this utility model.

[0012] The component names corresponding to the various reference numerals in the diagram are as follows: 1. Electromagnet; 11. Armature; 12. Limiting step; 13. Spring; 14. Spring seat; 2. Valve core; 21. Connecting shaft; 3. Valve body; 31. O-ring; 32. First oil passage; 33. Second oil passage; 34. Third oil passage; 35. Fourth oil passage; 36. Fifth oil passage. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0014] refer to Figure 1 As shown, this application discloses an electrically controlled reversing control switch valve, including a valve body 3. The valve body 3 has an inner cavity along the axial direction, and two valve cores 2 are provided in the inner cavity. In the non-working state, the valve cores 2 are symmetrically arranged around the center of the valve body 3, and the valve cores 2 are connected to each other through a connecting shaft 21. The valve body 3 is provided with a second oil passage 33 and a third oil passage 34. The second oil passage 33 is located on the outside of the valve core 2, and the third oil passage 34 is located on the outside of another valve core 2. The left and right servo piston chambers of the plunger pump are connected to the inner cavity of the valve body 3 through the second oil passage 33 and the third oil passage 34. The second oil passage 33 is provided with a first oil passage 32 on the side away from the third oil passage 34, and the third oil passage 34 is provided with a fourth oil passage 35 on the side away from the second oil passage 33. The oil drain port of the plunger pump is connected to the inner cavity of the valve body 3 through the first oil passage 32 and the fourth oil passage 35. A fifth oil passage 36 is provided at the center of the valve body 3, and the pilot oil port of the plunger pump is connected to the inner cavity of the valve body 3 through the fifth oil passage 36; Electromagnets 1 are provided at both ends of the valve body 3. One end of the electromagnet 1 is a protrusion with a thread on the outside. The protrusion is connected to the valve body 3 through the thread. The protrusion is hollow and has an armature 11 inside. One end of the armature 11 is connected to the electromagnet 1, and the other end of the armature 11 passes through the spring seat 14. A spring 13 is sleeved on the outside of the armature 11. One end of the spring 13 abuts against the spring seat 14, and the other end of the spring 13 abuts against the electromagnet 1. The side of the spring seat 14 away from the electromagnet 1 abuts against the end of the valve core 2. An O-ring 31 is fitted near the connection point between the protruding part of the electromagnet 1 and the valve body 3. The O-ring 31 is used for sealing to prevent oil leakage. The protrusion of the electromagnet 1 is provided with a limiting step 12, which is used to limit the movement of the spring seat 14 in the working state. The specific working principle is as follows: When electromagnet 1 is not energized, under the action of spring 13, valve core 2 is in the center position. The fifth oil passage 36, which is connected to the pilot oil port of the plunger pump, is blocked by valve core 2. Oil cannot enter the servo plunger chamber through the second oil passage 33 and the third oil passage 34. At the same time, the hydraulic oil in the servo control chamber of the plunger pump flows into the drain hole of the plunger pump from the first oil passage 32 and the fourth oil passage 35. This ensures that when electromagnet 1 is not energized, the servo plunger is in the center position and the plunger pump has no displacement output. At this time, the machine is in a stationary state.

[0015] When the left electromagnet 1 is energized, the armature 11 of electromagnet 1 extends, pushing the valve core 2 to compress the right spring 13 and spring seat 14 and move it to the right until the spring seat 14 is limited by the limiting step 12 of electromagnet 1. At this time, the fifth oil passage 36, which is connected to the pilot port of the plunger pump, is connected to the third oil passage 34. Oil enters the working chamber on one side of the servo plunger, pushing the servo plunger to move. At the same time, the servo plunger chamber on the other side, which is connected to the second oil passage 33, is connected to the first oil passage 32 for oil return. Thus, while the servo plunger chamber moves, the plunger pump outputs flow. When it is necessary to stop, the left electromagnet 1 is de-energized. Under the reset action of the spring 14, the fifth oil passage 36, which is connected to the pilot port of the plunger pump, is disconnected from the third oil passage 34 again. The servo plunger returns to the neutral position under the action of the reset spring inside the plunger pump, and the plunger pump outputs no flow.

[0016] When the operating condition requires reversal, current is supplied to the right electromagnet 1, and armature 11 extends, driving valve core 2 to move to the left. The servo plunger chamber on the other side connects with the control chamber, and the plunger pump outputs flow, thus reversing the machine. When stopping, the right electromagnet 1 is de-energized. Under the reset action of spring 13, the fifth oil passage 36, which is connected to the plunger pump pilot port, is disconnected from the second oil passage 33. The servo plunger returns to the neutral position under the action of the internal reset spring of the plunger pump, and the plunger pump outputs no flow.

[0017] The beneficial effects are: This utility model provides an electrically controlled reversing control switch valve, which eliminates the complex linkage mechanism of the original manual control. It has a simple structure, occupies little installation space, and has moderate design and installation precision. Most importantly, it uses an electrically controlled electromagnet 1 to realize the reversing start and stop operation, which greatly reduces the labor intensity of production and improves the work efficiency.

[0018] It should be noted that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used 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. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. "A plurality of" means two or more. "Installed," "connected," and "joined" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection.

[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. An electrically controlled directional control switching valve, characterized in that, Includes valve body (3), valve body (3) has an inner cavity along the axial direction, and two valve cores (2) are provided in the inner cavity. In the non-working state, the valve cores (2) are symmetrically arranged with respect to the center of valve body (3) and the valve cores (2) are connected to each other; The valve body (3) is provided with a second oil passage (33) and a third oil passage (34). The second oil passage (33) is located outside the valve core (2), and the third oil passage (34) is located outside the other valve core (2). A first oil passage (32) is provided on the side of the second oil passage (33) away from the third oil passage (34), and a fourth oil passage (35) is provided on the side of the third oil passage (34) away from the second oil passage (33). A fifth oil passage (36) is provided at the center of the valve body (3). Electromagnets (1) are provided at both ends of the valve body (3). One end of the electromagnet (1) is a protrusion that is connected to the valve body (3). The protrusion is hollow inside and has an armature (11) inside. One end of the armature (11) is connected to the electromagnet (1), and the other end of the armature (11) is inserted into the spring seat (14). A spring (13) is sleeved on the outside of the armature (11). One end of the spring (13) rests on the spring seat (14), and the other end of the spring (13) rests on the electromagnet (1). The side of the spring seat (14) away from the electromagnet (1) rests on the end of the valve core (2).

2. The electrically controlled directional control valve according to claim 1, characterized in that, The valve cores (2) are connected to each other via a connecting shaft (21).

3. The electrically controlled reversing control switch valve according to claim 1, characterized in that, The protrusion of the electromagnet (1) is threaded on the outside, and the protrusion is connected to the valve body (3) by the thread.

4. The electrically controlled directional control valve according to claim 3, characterized in that, An O-ring (31) is fitted near the connection position between the protrusion of the electromagnet (1) and the valve body (3).

5. The electrically controlled directional control switching valve according to claim 1, characterized in that, The protrusion of the electromagnet (1) is provided with a limiting step (12).

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