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A valve and its flow regulating device

A technology of valve body and valve stem, which is applied in the direction of valve device, fluid pressure actuating device, valve operation/release device, etc. It can solve the problems of limited scope of application, complex structure, and difficulty in realization, and achieve convenient operation and universal matching Strong, easy-to-achieve effects

Inactive Publication Date: 2011-11-30
米路加(上海)板金机械技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the design of this damping hole has a fixed size, and the regulation ratio of the flow is fixed, so the scope of application is greatly limited.
In addition, the use of proportional valves to adjust the return flow can also improve the defects of the above-mentioned pressure relief valves, but the cost of using proportional valves is high, the structure is complicated, and it is not easy to implement

Method used

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  • A valve and its flow regulating device
  • A valve and its flow regulating device
  • A valve and its flow regulating device

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Embodiment Construction

[0029]The present invention will be further described below in conjunction with accompanying drawing and embodiment:

[0030] image 3 and Figure 4 They are respectively a structural sectional view and an exploded view of a pressure relief valve according to an embodiment of the present invention. As shown in the figure, it can be seen that the present invention is figure 1 The shown is a further improvement of the existing pressure relief valve, thus having the same main structure as the existing pressure relief valve.

[0031] combine image 3 and Figure 4 As shown, the pressure relief valve in one embodiment of the present invention includes an upper valve body 20 , a lower valve body 30 , a valve core 40 and a flow adjustment device 100 , and the opening and closing of the pressure relief valve is controlled by a solenoid valve 10 . Specifically, as shown in FIG. 4 , the upper valve body 20 and the lower valve body 30 are locked into one body by a plurality of screw...

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Abstract

The invention discloses a valve and a flow regulating device adopted therein. The flow regulating device is provided with an input port and an output port, and the valve stem inside is provided with a gradual V groove and an annular groove, and the gradual V groove changes the communication amount with the input port with the movement of the valve stem, so The annular groove communicates with the output port. After the flow regulating device is screwed into the valve body, the input port communicates with the return hole side of the return passage, the output port communicates with the output hole side of the return passage, and the axially penetrating part of the valve stem The central hole communicates with the feedback channel. The present invention slows down the pressure relief process by setting a flow regulating device in the return flow channel of the valve, so that the oil pressure of the input hole decreases gradually without vibration and noise due to rapid pressure changes, and provides good shock absorption and pressure reduction. noise effect.

Description

technical field [0001] The invention relates to a hydraulic drive system, more specifically, a valve for pressure relief of a hydraulic drive system and a flow regulating device thereof. Background technique [0002] Hydraulic drive is a widely used power source in machining machines. For example, bending machines, stamping machines, etc. often use oil cylinders to drive the action of the upper die, and cooperate with the lower die to bend or stamp products. Hydraulic cylinders are generally connected with booster valves and pressure relief valves. When the booster valve is opened, the hydraulic oil is continuously input into the oil cylinder, so that the hydraulic pressure in the oil cylinder continues to rise, pushing the piston to move downward, and then driving the upper mold to move downward, and the pressure relief valve is closed at this time. After the work is finished, open the pressure relief valve, the hydraulic oil in the oil cylinder will flow back into the oi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/00F16K31/12F15B15/20
Inventor 川端正晃土山雄司
Owner 米路加(上海)板金机械技术开发有限公司
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