CN214118622U

CN214118622U - Hydraulic driving device

Info

Publication number: CN214118622U
Application number: CN202022480946.6U
Authority: CN
Inventors: 张翔
Original assignee: Chongqing Tiegong Electromechanical Co ltd
Current assignee: Chongqing Tiegong Electromechanical Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-09-03
Anticipated expiration: 2030-10-30

Abstract

The utility model provides a hydraulic drive device. The hydraulic balance valve comprises a hydraulic pump, a hydraulic cylinder and a balance valve, wherein the balance valve comprises a valve body and two connecting ports; a valve cavity is arranged in the valve body, an adjusting piston is arranged in the valve cavity, the moving resistance of the adjusting piston is smaller than that of a piston rod of the hydraulic cylinder, and the two connecting ports are respectively communicated with the two sides of the adjusting piston; the two connectors are also respectively communicated with two connecting pipes which are used for connecting the hydraulic cylinder and the hydraulic pump. The utility model provides a pneumatic cylinder produce reverse displacement's problem.

Description

Hydraulic driving device

Technical Field

The utility model relates to a hydraulic equipment technical field especially relates to a pneumatic cylinder.

Background

The hydraulic cylinder is often used for providing driving force in the ejection process, the hydraulic cylinder utilizes the hydraulic pump to provide power and is matched with a hydraulic pipeline and a liquid tank, and the hydraulic pump is provided with a motor. The rotation of the motor is matched with the piston mechanism to drive liquid suction and discharge. After the pushing is finished, the hydraulic cylinder is locked, the motor is powered off, but the rotor of the motor, the rotor of the hydraulic pump, the coupler and other transmission structures can still rotate for a certain angle due to the existence of inertia to form a flywheel effect, and the hydraulic medium continues to do work until the work overcomes the kinetic energy of the rotation. When the motor stops rotating forwards, the hydraulic pressure in the hydraulic cavity formed by the pipeline and the element on one side driven by the hydraulic pump is continuously increased to 4.2-4.8MPa, and the pressure on the other side is 0. At this time, the flywheel can reversely rotate under the action of the hydraulic pressure difference, so that the hydraulic cylinder reversely displaces. These large reverse displacements can lead to safety hazards, such as hydraulically driven switch machines, and can result in improper rail switching, which can create safety hazards.

SUMMERY OF THE UTILITY MODEL

To the not enough that exists among the prior art, the utility model provides a hydraulic drive device, it has solved the pneumatic cylinder production reverse displacement's that exists among the prior art problem.

According to an embodiment of the present invention, a hydraulic driving apparatus includes a hydraulic pump, a hydraulic cylinder, and a balance valve, wherein the balance valve includes a valve body and two connection ports; a valve cavity is arranged in the valve body, an adjusting piston is arranged in the valve cavity, the moving resistance of the adjusting piston is smaller than that of a piston rod of the hydraulic cylinder, and the two connecting ports are respectively communicated with the two sides of the adjusting piston; the two connectors are also respectively communicated with two connecting pipes which are used for connecting the hydraulic cylinder and the hydraulic pump.

The technical principle of the utility model is that: the two sides of the adjusting piston are respectively communicated with the two sides of the hydraulic cylinder through connecting pipes, and when the motor is normally driven, the adjusting piston is positioned on one side of the valve cavity; when the motor is powered off, the pressure in the valve cavity is continuously increased until the motor starts to rotate reversely, when the motor rotates reversely, the liquid amount on one side with the originally larger pressure is reduced, the liquid amount on the other side with the originally smaller pressure is increased, and the adjusting piston moves towards the other side of the valve cavity to overcome the liquid amount change on the two sides of the hydraulic pump caused by the reverse rotation of the motor, so that the piston of the hydraulic cylinder which is relatively difficult to move is kept still.

Compared with the prior art, the utility model discloses following beneficial effect has: the balance valve absorbs the liquid volume change at the two ends of the hydraulic cylinder caused by the reversal of the motor, thereby ensuring that the hydraulic cylinder cannot retract; and the normal driving of the hydraulic cylinder is not influenced.

Drawings

FIG. 1 is a cross-sectional view of a balanced valve.

Fig. 2 is a sectional view of a hollow bolt.

Fig. 3 is a schematic diagram showing the simple connection relationship between the balance valve and the hydraulic cylinder and the hydraulic pump.

In the above drawings: 1. a valve body; 2. a valve cavity; 3. an adjusting piston; 4. a plug screw; 5. a flow guide channel; 6. a connecting ring; 7. a flow dividing channel; 8. an annular groove; 9. a hollow bolt; 10. a side hole; 11. a buffer ring; 12. and a hydraulic cylinder.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in fig. 1 and 3, an embodiment of the present invention provides a hydraulic drive apparatus, which includes a hydraulic pump, a hydraulic cylinder 12, and a balance valve, where the balance valve includes a valve body 1 and two connection ports; a valve cavity 2 is arranged in the valve body 1, an adjusting piston 3 is arranged in the valve cavity 2, the moving resistance of the adjusting piston 3 is smaller than that of a piston rod of the hydraulic cylinder 12, and the two connecting ports are respectively communicated with two sides of the adjusting piston 3; the two connection ports are also respectively communicated with two connection pipes connecting the hydraulic cylinder 12 and the hydraulic pump.

As described in the scheme, the working process of the invention is as follows: two sides of the adjusting piston 3 are respectively communicated with two sides of the hydraulic cylinder 12, and when the motor is normally driven, the adjusting piston 3 is positioned at one side of the valve cavity 2; when the motor used as the oil supply power is de-energized, the motor continuously rotates due to inertia, the pressure in the valve cavity 2 continuously increases until the motor stops rotating forwards and starts rotating backwards, when the motor rotates backwards, the liquid amount on one side with the originally larger pressure is reduced, the liquid amount on the other side with the originally smaller pressure is increased, and the adjusting piston 3 is easier to move, so that the adjusting piston 3 moves towards the other side of the valve cavity 2 to overcome the liquid amount change on the two sides of the hydraulic pump caused by the reverse rotation of the motor, and the piston of the hydraulic cylinder 12 which is relatively difficult to move keeps still.

In the working process of the hydraulic cylinder 12, the inertia rotation and the reverse rotation of the motor are inevitable, the utility model utilizes the adjusting piston 3 to adjust the liquid amount on the two sides of the hydraulic pump when the motor rotates reversely, and replaces the original movement of the piston of the hydraulic cylinder 12; thereby achieving the purpose of preventing the hydraulic rod from rebounding.

Furthermore, two ends of the valve cavity 2 penetrate through the valve body 1 respectively, and a screw plug 4 for plugging the valve cavity 2 is arranged at the end part of the valve cavity 2. The arrangement mode is favorable for production and assembly of the balance valve, and the balance valve is convenient to disassemble and maintain.

Furthermore, a flow guide channel 5 is arranged in the screw plug 4, and the flow guide channel 5 is communicated with the connecting port and the valve cavity 2. The setting of water conservancy diversion passageway 5 prevents that setting up of plug screw 4 from influencing flow area and then influencing mounting structure for plug screw 4 can also play the limiting displacement to adjusting piston 3, prevents to adjust plug screw 4 and pastes tight side after, and liquid can't reach adjusting piston 3 terminal surface and influence pressure transmission.

Furthermore, two sides of the adjusting piston 3 are provided with buffer rings 11. The damping ring 11 prevents a rigid contact between the adjusting piston 3 and the two screw plugs 4, which contributes to a longer life of the adjusting piston 3.

Further, as shown in fig. 2, the connecting port is provided with a connecting ring 6, the connecting pipe is provided with a hollow bolt 9, the side wall of the hollow bolt 9 is provided with a side hole 10, the connecting ring 6 is provided with a through hole for the hollow bolt 9 to pass through, and the inner wall of the through hole is also provided with a shunt channel 7 for communicating the side hole 10 with the connecting port. The hollow bolt 9 is provided at the end part of the common hydraulic pipe, and is convenient to connect and disassemble. The utility model is provided with a side hole 10 for connecting with a balance valve; the connection ring 6 is arranged in a manner more adapted to the limited space inside the device.

Furthermore, the inner wall of the through hole is provided with an annular groove 8, and one end of the diversion channel 7 is positioned at the bottom of the annular groove 8. Because the space in the equipment is limited, the hollow bolt 9 is not easy to be twisted too much to cause the damage of the connecting part with the pipeline, and whether the shunt passage 7 corresponds to the side hole 10 is not easy to observe, and the annular groove 8 is arranged, so that the hollow bolt 9 can be communicated with the shunt passage 7 at any angle. When the sealing device is specifically arranged, the connecting ring 6 is flat, and other structures can be conveniently connected from two sides for sealing.

It is worth explaining, for guaranteeing sealed, the utility model discloses each connection position and piston side need set up sealedly, and suitable sealing washer or other seal structure can be selected according to actual conditions to the skilled in the art personnel. Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A hydraulic drive device, includes hydraulic pump and pneumatic cylinder, its characterized in that: the balance valve comprises a valve body and two connecting ports; a valve cavity is arranged in the valve body, an adjusting piston is connected in the valve cavity in a sliding mode, the moving resistance of the adjusting piston is smaller than that of a piston rod of the hydraulic cylinder, and the two connecting ports are respectively communicated with the two sides of the adjusting piston; the two connectors are also respectively communicated with two connecting pipes which are used for connecting the hydraulic cylinder and the hydraulic pump.

2. A hydraulic drive as claimed in claim 1 wherein: two ends of the valve cavity penetrate through the valve body respectively, and the end part of the valve cavity is provided with a plug screw for plugging the valve cavity.

3. A hydraulic drive as claimed in claim 2 wherein a fluid conducting passageway is provided in said plug screw, said fluid conducting passageway communicating with said port and said valve chamber.

4. A hydraulic drive as claimed in claim 3 wherein the adjustment piston is provided with damping rings on either side.

5. The hydraulic drive device as claimed in claim 1, wherein the connection port is provided with a connection ring, the connection pipe is provided with a hollow bolt, the side wall of the hollow bolt is provided with a side hole, the connection ring is provided with a through hole for the hollow bolt to pass through, and the inner wall of the through hole is further provided with a shunt channel for communicating the side hole with the connection port.

6. A hydraulic drive as claimed in claim 5 wherein the inner wall of said through bore is provided with an annular groove and one of the ends of said flow diversion passage is located at the bottom of the annular groove.