Hydraulic valve group capable of avoiding large starting impact of hydraulic system

Abstract

The utility model discloses a hydraulic valve bank capable of avoiding large starting impact of a hydraulic system, which comprises a constant pressure variable pump and an inlet pipe, the constant pressure variable pump is provided with a conveying assembly, the conveying assembly comprises a guide pipe and an outlet pipe, the guide pipe is provided with a valve assembly, the valve assembly comprises a valve sleeve and a valve pin, and the valve sleeve and the valve pin are arranged on the guide pipe. A pushing assembly is installed on the inner side of the valve sleeve and comprises an electromagnet and a spring, an anti-impact assembly is installed at the bottom of the guide pipe and comprises a connecting sleeve and a piston, and the hydraulic valve set capable of avoiding large starting impact of the hydraulic system can be suitable for oil supply control of the hydraulic system.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valve group equipment of hydraulic systems, in particular to a hydraulic valve group that prevents a large impact from starting a hydraulic system. Background Art

[0002] To ensure the delivery of hydraulic oil in a hydraulic system, a hydraulic valve assembly is often required. The utility model patent application number CN201921990456.1 discloses a hydraulic control valve assembly that can effectively regulate the pressure of a push-pull motor, reduce vibration and impact in the hydraulic system, and improve work efficiency. Different oil circuit responses are made for forward and reverse rotation of the motor. When the motor rotates forward, the load continues to increase. The utility model balance valve assembly can be used to relieve pressure through the balance valve to reduce system pressure. When the motor reverses, the control oil port has pilot pressure, and the balance valve pressure setting will decrease accordingly according to the proportional value of the valve until the valve port opens, maintaining system stability. According to the disclosed technical solution, when using the existing hydraulic valve assembly equipment of the hydraulic system, on the one hand, the hydraulic system composed of a constant pressure variable pump has a large flow rate at startup, resulting in a large impact, which can cause low-load actuators to move instantly and then stop, or low-load motor actuators to rotate slowly. On the other hand, when working under low load, it is easy for the oil pump to suck air due to insufficient return of hydraulic oil, which is not conducive to ensuring the service life of the oil pump.

[0003] Therefore, how to design a hydraulic valve group that avoids the large impact of hydraulic system startup has become our current problem to be solved. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a hydraulic valve group that avoids the large impact when the hydraulic system is started, so as to solve the problems raised in the above background technology. The utility model has a reasonable design and is relatively convenient to use, and is suitable for oil supply control of the hydraulic system.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic valve group for avoiding large impact when the hydraulic system is started, comprising a constant-pressure variable pump and an inlet pipe, the constant-pressure variable pump is equipped with a conveying assembly, the conveying assembly comprises a conduit and an outlet pipe, the conduit is equipped with a valve assembly, the valve assembly comprises a valve sleeve and a valve pin, a pushing assembly is installed on the inner side of the valve sleeve, the pushing assembly comprises an electromagnet and a spring, an anti-impact assembly is installed at the bottom of the conduit, the anti-impact assembly comprises a connecting sleeve and a piston, a decompression assembly is installed at the bottom of the connecting sleeve, the decompression assembly comprises a decompression valve and a one-way valve.

[0006] Furthermore, one end of the conduit is welded to one side of the constant pressure variable pump, the other end of the conduit is welded to one side of the valve sleeve, the outlet pipe is welded to the other side of the valve sleeve, and the conduit is connected to the outlet pipe through the valve sleeve.

[0007] Furthermore, the valve pin is clamped on the top of the valve sleeve, and the outer side of the valve pin is sealed on the inner wall of the valve sleeve.

[0008] Furthermore, the electromagnet is sealed and mounted on the inner wall of the bottom of the valve sleeve, and the electromagnet is connected to the bottom of the valve pin via a spring.

[0009] Furthermore, through openings are welded to the top and bottom of one end of the sleeve, and the top of the sleeve is connected to the bottom of the conduit through the through openings.

[0010] Furthermore, the piston is stuck in the other end of the sleeve, the piston is sealed on the inner wall of the sleeve, the other end of the sleeve is connected to the inner side of the valve sleeve through a connecting pipe, and the bottom of the valve sleeve and the inner side of the other end of the sleeve are both filled with hydraulic oil.

[0011] Furthermore, the bottom of the sleeve is connected to the pressure reducing valve through a through port, and one end of the pressure reducing valve is connected to the one-way valve.

[0012] Furthermore, the one-way valve is connected to one side of the inlet pipe, and the inlet pipe is welded to the bottom of the constant pressure variable pump.

[0013] Beneficial effects: 1. When the hydraulic valve group that avoids large impact when the hydraulic system is started is in use, the high-pressure hydraulic oil generated by the constant-pressure variable pump is pumped out through the conduit, and the electromagnet is turned on at the same time. The electromagnet attracts the valve pin downward on the inner side of the valve sleeve through magnetic force, so that the valve pin compresses the spring and slowly squeezes the hydraulic oil in the valve sleeve to the inner side of the sleeve through the connecting pipe, so that the hydraulic oil in the sleeve pushes the piston to the left, so that the valve pin gradually opens the connection between the top of the valve sleeve and the conduit and the outlet pipe, and the piston slowly closes the connecting port on the sleeve, so that the hydraulic oil can slowly increase to boost the pressure of the hydraulic system, avoiding damage caused by excessive impact force of the hydraulic oil, ensuring the safety of the hydraulic system, and at the same time avoiding excessive pressure on the pipeline caused by the hydraulic oil pumped into the pipeline by the constant-pressure variable pump failing to flow out in time, thereby ensuring the safety of the pipeline.

[0014] 2. This prevents the hydraulic system from starting up with a large impact on the hydraulic valve group. When the valve pin has not completely opened the valve sleeve, the hydraulic oil in the conduit enters the inner side of the pressure reducing valve through the connecting sleeve, and after being reduced in pressure, enters the inner side of the inlet pipe through the one-way valve, and then flows to the bottom of the constant-pressure variable pump, so that the flow of the hydraulic oil that has leaked due to the impact flows into the inner side of the inlet pipe in one direction. It also prevents the constant-pressure variable pump from being sucked into the bottom of the constant-pressure variable pump due to the failure to replenish the hydraulic oil in time when starting, thereby increasing the service life of the constant-pressure variable pump.

[0015] 3. The hydraulic valve group that avoids large shock when starting the hydraulic system is reasonably designed, more efficient and convenient to use, and is suitable for oil supply control of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a hydraulic valve group for preventing a large shock when starting a hydraulic system according to the present invention;

[0017] Figure 2 This is a cross-sectional view of a hydraulic valve group for preventing a large start-up impact of a hydraulic system according to the present invention;

[0018] Figure 3 This is a structural diagram of a valve sleeve of a hydraulic valve group for preventing a large shock when starting a hydraulic system according to the present invention;

[0019] In the figure: 1. Constant pressure variable pump; 2. Conduit; 3. Outlet pipe; 4. Valve sleeve; 5. Valve pin; 6. Electromagnet; 7. Spring; 8. Connecting sleeve; 9. Piston; 10. Connecting pipe; 11. Pressure reducing valve; 12. Check valve; 13. Inlet pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 3The utility model provides a technical solution: a hydraulic valve group to avoid large shock when the hydraulic system is started, including a constant pressure variable pump 1 and an inlet pipe 13, the constant pressure variable pump 1 is equipped with a delivery component, the delivery component includes a conduit 2 and an outlet pipe 3, the conduit 2 is equipped with a valve component, the valve component includes a valve sleeve 4 and a valve pin 5, the inner side of the valve sleeve 4 is equipped with a push component, the push component includes an electromagnet 6 and a spring 7, the bottom of the conduit 2 is equipped with an anti-shock component, the anti-shock component includes a sleeve 8 and a piston 9, the bottom of the sleeve 8 is equipped with a pressure reducing component, the pressure reducing component includes a pressure reducing valve 11 and a one-way valve 12, the bottom of the sleeve 8 is connected through a through port It is connected to the pressure reducing valve 11, one end of the pressure reducing valve 11 is connected to the one-way valve 12, the one-way valve 12 is connected to one side of the inlet pipe 13, and the inlet pipe 13 is welded to the bottom of the constant pressure variable pump 1. When the valve pin 5 does not completely open the valve sleeve 4, the hydraulic oil in the conduit 2 enters the inner side of the pressure reducing valve 11 through the sleeve 8, and after being reduced in pressure, enters the inner side of the inlet pipe 13 through the one-way valve 12, and then flows to the bottom of the constant pressure variable pump 1, so that the flow rate of the hydraulic oil that has leaked from the impact flows into the inner side of the inlet pipe 13 in one direction, and prevents the constant pressure variable pump 1 from being sucked into the bottom of the constant pressure variable pump 1 due to the inability to replenish the hydraulic oil in time when starting, thereby increasing the service life of the constant pressure variable pump 1.

[0022] In this embodiment, one end of the conduit 2 is welded to one side of the constant pressure variable pump 1, the other end of the conduit 2 is welded to one side of the valve sleeve 4, the outlet pipe 3 is welded to the other side of the valve sleeve 4, the conduit 2 is connected to the outlet pipe 3 through the valve sleeve 4, the valve pin 5 is clamped on the top of the valve sleeve 4, the outer side of the valve pin 5 is sealed on the inner wall of the valve sleeve 4, the electromagnet 6 is sealed on the inner wall of the bottom of the valve sleeve 4, the electromagnet 6 is connected to the bottom of the valve pin 5 through a spring 7, the top and bottom of one end of the connecting sleeve 8 are welded with through ports, the top of the connecting sleeve 8 is connected to the bottom of the conduit 2 through the through port, the piston 9 is clamped on the other end of the connecting sleeve 8, the piston 9 is sealed on the inner wall of the connecting sleeve 8, the other end of the connecting sleeve 8 is connected to the inner side of the valve sleeve 4 through the connecting pipe 10, and the bottom of the valve sleeve 4 and the inner side of the other end of the connecting sleeve 8 are both equipped with When the hydraulic oil is in use, the high-pressure hydraulic oil generated by the constant-pressure variable pump 1 is pumped out through the conduit 2, and the electromagnet 6 is turned on at the same time. The electromagnet 6 attracts the valve pin 5 downward on the inner side of the valve sleeve 4 through magnetic force, so that the valve pin 5 compresses the spring 7 and slowly squeezes the hydraulic oil in the valve sleeve 4 to the inner side of the connecting sleeve 8 through the connecting pipe 10, so that the hydraulic oil in the connecting sleeve 8 pushes the piston 9 to the left, so that the valve pin 5 gradually opens the connection between the top of the valve sleeve 4 and the conduit 2 and the outlet pipe 3, and the piston 9 slowly closes the connection on the connecting sleeve 8, so that the hydraulic oil can slowly increase to boost the pressure of the hydraulic system, avoiding damage caused by excessive impact force of the hydraulic oil, ensuring the working safety of the hydraulic system, and at the same time avoiding excessive pressure on the pipeline caused by the hydraulic oil pumped into the pipeline by the constant-pressure variable pump 1 failing to flow out in time, thereby ensuring the safety of the pipeline.

[0023] The hydraulic valve group that avoids the large shock of the hydraulic system starting provides power to all electrical equipment through an external power supply. When in use, the high-pressure hydraulic oil generated by the constant-pressure variable pump 1 is pumped out through the conduit 2, and the electromagnet 6 is turned on at the same time. The electromagnet 6 attracts the valve pin 5 downward on the inner side of the valve sleeve 4 through magnetic force, so that the valve pin 5 compresses the spring 7 and slowly squeezes the hydraulic oil in the valve sleeve 4 to the inner side of the connecting sleeve 8 through the connecting pipe 10, so that the hydraulic oil in the connecting sleeve 8 pushes the piston 9 to the left, so that the valve pin 5 gradually opens the connection between the top of the valve sleeve 4 and the conduit 2 and the outlet pipe 3, and the piston 9 slowly closes the connection port on the connecting sleeve 8, so that the hydraulic oil can slowly increase to perform pressurization work for the hydraulic system, avoiding To prevent damage caused by excessive impact force of hydraulic oil, the working safety of the hydraulic system is guaranteed. At the same time, it is avoided that the hydraulic oil pumped into the pipeline by the constant pressure variable pump 1 cannot flow out in time, which causes the pipeline to bear excessive pressure. To ensure the safety of the pipeline, when the valve pin 5 has not completely opened the valve sleeve 4, the hydraulic oil in the conduit 2 enters the inner side of the pressure reducing valve 11 through the connecting sleeve 8, and after decompression, enters the inner side of the inlet pipe 13 through the one-way valve 12, and then flows to the bottom of the constant pressure variable pump 1, so that the flow rate of the hydraulic oil leaked by the impact flows into the inner side of the inlet pipe 13 in one direction, and prevents the constant pressure variable pump 1 from being sucked into the bottom of the constant pressure variable pump 1 due to the inability to replenish the hydraulic oil in time when starting, thereby increasing the service life of the constant pressure variable pump 1.

[0024] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A hydraulic valve group for preventing a large shock when a hydraulic system is started, comprising a constant pressure variable pump (1) and an inlet pipe (13), wherein the constant pressure variable pump (1) is provided with a delivery assembly, wherein the delivery assembly comprises a conduit (2) and an outlet pipe (3), and wherein: The conduit (2) is provided with a valve assembly, the valve assembly comprising a valve sleeve (4) and a valve pin (5), a pushing assembly is provided on the inner side of the valve sleeve (4), the pushing assembly comprises an electromagnet (6) and a spring (7), an anti-impact assembly is provided on the bottom of the conduit (2), the anti-impact assembly comprises a connecting sleeve (8) and a piston (9), a decompression assembly is provided on the bottom of the connecting sleeve (8), the decompression assembly comprises a decompression valve (11) and a one-way valve (12).

2. The hydraulic valve assembly for preventing a large shock during startup of a hydraulic system according to claim 1, characterized in that: One end of the conduit (2) is welded to one side of the constant pressure variable pump (1), the other end of the conduit (2) is welded to one side of the valve sleeve (4), the outlet pipe (3) is welded to the other side of the valve sleeve (4), and the conduit (2) is connected to the outlet pipe (3) through the valve sleeve (4).

3. The hydraulic valve assembly for preventing a large shock during the startup of a hydraulic system according to claim 2, characterized in that: The valve pin (5) is clamped on the top of the valve sleeve (4), and the outer side of the valve pin (5) is sealed on the inner wall of the valve sleeve (4).

4. The hydraulic valve assembly for preventing a large shock during startup of a hydraulic system according to claim 3, characterized in that: The electromagnet (6) is sealed and mounted on the inner wall of the bottom of the valve sleeve (4). The electromagnet (6) is connected to the bottom of the valve pin (5) via a spring (7).

5. The hydraulic valve assembly for preventing a large shock during the startup of a hydraulic system according to claim 1, characterized in that: Through-holes are welded to the top and bottom of one end of the connecting sleeve (8), and the top of the connecting sleeve (8) is connected to the bottom of the conduit (2) through the through-holes.

6. The hydraulic valve assembly for preventing a large shock during startup of a hydraulic system according to claim 5, characterized in that: The piston (9) is clamped at the other end of the connecting sleeve (8), and the piston (9) is sealed on the inner wall of the connecting sleeve (8). The other end of the connecting sleeve (8) is connected to the inner side of the valve sleeve (4) through the connecting pipe (10). The bottom of the valve sleeve (4) and the inner side of the other end of the connecting sleeve (8) are both filled with hydraulic oil.

7. The hydraulic valve assembly for preventing a large shock during startup of a hydraulic system according to claim 6, characterized in that: The bottom of the connecting sleeve (8) is connected to the pressure reducing valve (11) through a through port, and one end of the pressure reducing valve (11) is connected to the one-way valve (12).

8. The hydraulic valve assembly for preventing a large shock during startup of a hydraulic system according to claim 7, characterized in that: The one-way valve (12) is connected to one side of an inlet pipe (13), and the inlet pipe (13) is welded to the bottom of the constant pressure variable pump (1).

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