Double-path hydraulic control sequence valve

Abstract

The utility model discloses a kind of two-way hydraulic control sequence valves, including valve body, first oil inlet, second oil inlet, first oil outlet, second oil outlet are respectively provided on valve body, first oil inlet is communicated with first oil outlet, second oil inlet is communicated with second oil outlet, unidirectional valve is respectively arranged between first oil inlet and first oil outlet and between second oil inlet and second oil outlet;Valve cavity is opened in the valve body interior;Control valve core is slidably arranged in the valve cavity in the center of the valve cavity, unidirectional valve is respectively arranged in the valve cavity in the left and right sides of control valve core;Overflow valve is respectively arranged on the valve body in the left and right sides of control valve core, and overflow valve and unidirectional valve are connected in parallel in corresponding side;The utility model is equipped with overflow valve and unidirectional valve by two groups parallelly, realizes the two-way communication of oil circuit, so that valve body integrates two-way sequence control and two-way overflow protection function, solve the problem that single sequence valve cannot satisfy oil two-way flow demand.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control valve technology, specifically to a dual-channel hydraulic control sequence valve. Background Technology

[0002] In hydraulic transmission and control systems, a sequence valve is a fundamental and crucial component used to control multiple actuators to operate in a predetermined sequence. Its basic working principle is as follows: when the inlet pressure reaches the valve's set pressure (adjusted pressure), the valve opens, allowing oil to flow to the secondary circuit and drive the next actuator.

[0003] Conventional sequence valves (such as direct-acting or pilot-operated sequence valves) are typically designed for unidirectional flow control, effectively controlling the hydraulic fluid to open in one direction (A -> B) after reaching a set pressure. However, for applications requiring bidirectional hydraulic fluid flow (e.g., the extension and retraction of a hydraulic cylinder piston rod need independent control of its movement sequence), and where sequential control functionality may be required in both directions (e.g., different bidirectional loads), a single unidirectional sequence valve cannot meet the requirements.

[0004] Therefore, there is an urgent need to develop a hydraulic sequence valve with a simple structure that can effectively achieve bidirectional sequential control and overflow protection. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a dual-path hydraulic sequence valve to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0007] A dual-way hydraulic sequence valve includes a valve body with a first oil inlet, a second oil inlet, a first oil outlet, and a second oil outlet. The first oil inlet and the first oil outlet are connected, and the second oil inlet and the second oil outlet are connected. A check valve is provided between the first oil inlet and the first oil outlet, and between the second oil inlet and the second oil outlet. A valve cavity is opened inside the valve body, and end caps are provided at both ends of the valve cavity. A control valve core is slidably arranged in the center of the valve cavity, and check valves are respectively arranged in the valve cavities on the left and right sides of the control valve core. An overflow valve is provided on the valve body on the left and right sides of the control valve core to push the control valve core to open the check valve and realize the reverse flow of oil. An overflow valve inlet channel and an overflow valve outlet channel are respectively opened on the valve body to connect the valve cavity and the overflow valve. The overflow valve and the check valve on the corresponding side are arranged in parallel.

[0008] The aforementioned dual-path hydraulic sequence valve includes a valve sleeve disposed inside the valve cavity. An oil passage is provided in the center of the valve sleeve, and a one-way valve core is disposed inside the valve sleeve. The one-way valve core is slidably connected to the oil passage of the valve sleeve, and the two ends of the control valve core are slidably disposed in the oil passage in the center of the valve sleeve and in contact with the one-way valve core.

[0009] The above-mentioned dual-path hydraulic sequence valve includes a valve sleeve comprising a main body, a conical part, and an inlet part. The inlet part is located near the control valve core. The inlet part and the main body are respectively spaced apart from the corresponding valve chambers. The conical part abuts against the inner wall of the valve chamber. The inlet part is provided with an oil passage hole for oil to pass through the inlet. The main body is provided with an oil outlet for discharging oil into the valve chamber.

[0010] The aforementioned dual-way hydraulic sequence valve has a spring at one end of the one-way valve core, which is away from the control valve core, and the other end of the spring is connected to a spring seat located inside the end cover.

[0011] The aforementioned dual-way hydraulic sequence valve has an adjusting bolt connected to a spring seat at the end of the end cap, and a dust cover is provided on the outside of the end cap to protect the adjusting bolt.

[0012] The aforementioned dual-path hydraulic sequence valve also has a protective sleeve installed on the outside of the overflow valve.

[0013] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0014] This utility model provides a dual-path hydraulic sequence valve, which achieves bidirectional oil circuit communication through two sets of parallel overflow valves and check valves. The check valve is opened in reverse by pushing the control valve core through the overflow valve, allowing the oil to flow in reverse. The structure is simple and easy to operate. The overflow valve itself provides overload overflow protection for the reverse oil circuit, so that the valve body integrates bidirectional sequence control and bidirectional overflow protection functions into one, solving the problem that a single sequence valve cannot meet the bidirectional oil flow requirements. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram of the specific structure of the reverse flow of oil in this utility model;

[0017] Figure 3 This is a schematic diagram showing the specific distribution of the oil inlet and oil outlet of this utility model;

[0018] Figure 4 This is a schematic diagram of the present invention.

[0019] The components are: 1. Valve body, 2. Valve sleeve, 3. One-way valve core, 4. End cap, 5. Spring, 6. Adjusting bolt, 7. Oil drain port, 8. Valve cavity, 9. Relief valve inlet channel, 10. Relief valve outlet channel, 11. Relief valve, 12. Protective sleeve, 13. Control valve core, A1. First oil inlet, A2. Second oil inlet, B1. First oil outlet, B2. Second oil outlet. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Dual-channel hydraulic sequence valve, such as Figures 1 to 4 As shown, the device includes a valve body 1, which is provided with a first oil inlet A1, a second oil inlet A2, a first oil outlet B1, and a second oil outlet B2. The first oil inlet A1 is connected to the first oil outlet B1, and the second oil inlet A2 is connected to the second oil outlet B2. A one-way valve is provided between the first oil inlet A1 and the first oil outlet B1, and between the second oil inlet A2 and the second oil outlet B2. A valve cavity 8 is provided inside the valve body 1. End caps 4 are provided at both ends of the valve cavity 8. A control valve core 13 is slidably provided in the center of the valve cavity 8. The one-way valves are respectively provided in the valve cavities 8 on the left and right sides of the control valve core 13.

[0022] On the valve body located on the left and right sides of the control valve core 13, there are relief valves 11 that push the control valve core 13 to move and open the check valve to realize the reverse flow of oil. The relief valves 11 on the corresponding sides are connected in parallel with the check valves. The valve body 1 is provided with relief valve oil inlet channel 9 and relief valve oil outlet channel 10 that connect the valve chamber 8 and the relief valve 11.

[0023] The overflow valve 11 is also provided with a protective sleeve 12 for dust prevention and protection of the overflow valve.

[0024] The one-way valve includes a valve sleeve 2 disposed inside the valve cavity 8. The valve sleeve 2 has an oil passage at its center. The valve sleeve 2 includes a main body, a conical part, and an inlet part. The inlet part is disposed on the side close to the control valve core 13. The inlet part and the main body are respectively separated from the corresponding valve cavity 8. The conical part abuts against the inner wall of the valve cavity 8. The inlet part is provided with an oil passage hole for oil to pass through the oil inlet. The main body is provided with an oil outlet 7 for discharging oil to the valve cavity 8.

[0025] The valve sleeve 2 is equipped with a one-way valve core 3. The one-way valve core 3 is slidably connected to the oil passage of the valve sleeve 2. One end of the one-way valve core 3 near the liquid inlet is a conical structure, which makes it easy to block the outlet of the oil passage in the liquid inlet.

[0026] The two ends of the control valve core 13 are slidably disposed in the oil passage at the center of the valve sleeve 2 and in contact with the one-way valve core 3. The reverse flow of oil is achieved by controlling the movement of the control valve core 13 in the valve cavity 8.

[0027] To ensure that the oil flows smoothly through the oil passage, the gap between the control valve core 13 extending into the oil passage and the oil passage is set.

[0028] A spring 5 is provided at one end of the one-way valve core 3, which is away from the control valve core 13, and the other end of the spring 5 is connected to a spring seat provided in the end cover 4.

[0029] The end cap 4 is threadedly connected to an adjusting bolt 6 that is connected to a spring seat. The end cap 4 is also provided with a dust cover to protect the adjusting bolt.

[0030] The working principle of this utility model is as follows:

[0031] When oil enters through the first inlet A1 and the second inlet A2, the one-way valve core is compressed under oil pressure, causing the oil in the first inlet A1 to flow through the one-way valve on the left to the first outlet B1, and the oil in the second inlet A2 to flow through the one-way valve on the left to the second outlet B2. At this time, the oil direction is normal, and a portion of the oil will be diverted into the overflow valve for storage.

[0032] When oil needs to be supplied from the first oil outlet B1, such as Figure 2 As shown, firstly, the overflow valve on the right is opened, and the oil stored in the overflow valve is discharged through the overflow valve outlet channel 10 into the valve cavity 8 between the control valve core 13 and the right valve sleeve 2. At this time, the oil will push the control valve core 13 to move to the left, pushing the one-way valve core 3 between the first oil inlet A1 and the first oil outlet B1 to open. At the same time, the control valve core 13 is in close contact with the end face of the left valve sleeve, so that the oil can flow from the first oil outlet B1 to the first oil inlet A1, realizing the reverse flow of the oil. The dotted line indicates the direction of oil flow in the overflow valve, and the solid line indicates the direction of oil flow in the first oil outlet B1.

[0033] It should be noted that when oil is introduced into the first oil outlet B1, there is no oil flowing in the pipeline connecting the second oil inlet A2 and the second oil outlet B2, and the second oil inlet A2 and the second oil outlet B2 are closed.

[0034] This utility model provides a dual-path hydraulic sequence valve, which achieves bidirectional oil circuit communication through two sets of parallel overflow valves and check valves. The check valve is opened in reverse by pushing the control valve core through the overflow valve, allowing the oil to flow in reverse. The structure is simple and easy to operate. The overflow valve itself provides overload overflow protection for the reverse oil circuit, so that the valve body integrates bidirectional sequence control and bidirectional overflow protection functions into one, solving the problem that a single sequence valve cannot meet the bidirectional oil flow requirements.

Claims

1. A dual-channel hydraulically controlled sequence valve, characterized in that: The system includes a valve body (1), on which are respectively provided a first oil inlet (A1), a second oil inlet (A2), a first oil outlet (B1), and a second oil outlet (B2). The first oil inlet (A1) is connected to the first oil outlet (B1), and the second oil inlet (A2) is connected to the second oil outlet (B2). A one-way valve is provided between the first oil inlet (A1) and the first oil outlet (B1), and between the second oil inlet (A2) and the second oil outlet (B2). A valve cavity (8) is opened inside the valve body (1), and two ends of the valve cavity (8) are provided with... End cap (4); a control valve core (13) is slidably disposed in the center of the valve chamber (8), and check valves are respectively disposed in the valve chambers (8) on the left and right sides of the control valve core (13); on the valve bodies on the left and right sides of the control valve core (13), overflow valves (11) are respectively disposed to push the control valve core (13) to move and open the check valve to realize the reverse flow of oil. The valve body (1) is respectively provided with an overflow valve inlet channel (9) and an overflow valve outlet channel (10) connecting the valve chamber (8) and the overflow valve (11). The overflow valve (11) on the corresponding side is connected in parallel with the check valve.

2. The dual-channel hydraulic sequence valve according to claim 1, characterized in that: The one-way valve includes a valve sleeve (2) disposed inside the valve cavity (8). An oil passage is provided in the center of the valve sleeve (2). A one-way valve core (3) is disposed inside the valve sleeve (2). The one-way valve core (3) is slidably connected to the oil passage of the valve sleeve (2). The two ends of the control valve core (13) are slidably disposed in the oil passage in the center of the valve sleeve (2) and in contact with the one-way valve core (3).

3. The dual-channel hydraulic sequence valve according to claim 2, characterized in that: The valve sleeve (2) includes a main body, a conical part, and an inlet part. The inlet part is located near the control valve core (13). The inlet part and the main body are respectively spaced apart from the corresponding valve chamber (8). The conical part abuts against the inner wall of the valve chamber (8). The inlet part is provided with an oil passage hole for oil to pass through the oil inlet. The main body is provided with an oil outlet (7) for discharging oil to the valve chamber (8).

4. The dual-channel hydraulic sequence valve according to claim 2, characterized in that: A spring (5) is provided at one end of the one-way valve core (3) which is far away from the control valve core (13), and the other end of the spring (5) is connected to a spring seat provided in the end cover (4).

5. The dual-channel hydraulic sequence valve according to claim 4, characterized in that: The end cap (4) is threadedly connected to an adjusting bolt (6) that is connected to a spring seat. The end cap (4) is also provided with a dust cover to protect the adjusting bolt.

6. The dual-channel hydraulic sequence valve according to claim 1, characterized in that: The overflow valve (11) is also provided with a protective sleeve (12).

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