balance valve

A technology of balance valve and valve body, which is applied in the field of hydraulic valves, can solve the problems that the balance valve opening cannot be adjusted well, affects the scope of application, and is prone to damage, etc., so as to improve flexibility and application scope, reduce jitter, The effect of improving safety performance

Inactive Publication Date: 2011-12-07
江苏鼎晟液压有限公司
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Problems solved by technology

[0004] However, the above-mentioned patents still have the following defects: 1) There are still certain difficulties in the processing of the two-channel structure, which puts forward higher requirements for processing and installation, and is prone to damage; 2) The existing two-channel structure When the structure is in the process of falling the weight, the force of the control oil port and the force of the hydraulic oil are in opposite directions, making it difficult for the valve stem to remain in a relatively static state, and the flow rate of the hydraulic oil will change at any time, causing the weight to fall It is still prone to jitter, causing system instability; 3) The opening of the balance valve in the above patent is still not well adjusted, which affects its scope of application

Method used

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Embodiment Construction

[0015] The present invention includes a valve body 4 and left cover 2 and right cover 6 arranged on both sides of the valve body. The valve body 4 is provided with two oil ports A and B, and the left cover 2 is provided with a control oil port K; There is a valve stem 3 that can move along the inner cavity of the valve body 4. There is a channel between the oil ports A and B. The inner cavity of the valve body 4 is provided with a valve seat 5 that cooperates with the valve stem 3 to open or cooperate with the channel. .

[0016] In the present invention, the pressure difference direction of the control oil port K acting on the valve rod 3 is consistent with the oil return direction.

[0017] The left cover 2 is provided with an adjusting screw 1 , and the adjusting screw 1 extends to the inner cavity of the valve body 4 and contacts with the valve stem 3 .

[0018] The working process of the present invention is: when the oil is fed from the A oil port to the B oil port, tha...

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Abstract

The invention relates to a balance valve. It includes the valve body and the end caps arranged on both sides of the valve body. There are two oil ports A and B on the valve body, and the end cap on one side is provided with the control oil port K; the valve body is equipped with a valve that can move along the inner cavity of the valve body. There is a passage between the two oil ports of A and B, and a valve seat is provided on the inner cavity of the valve to cooperate with the valve stem to open or cooperate with the passage. The invention provides a balance valve with a simple structure, which can further prevent the shaking phenomenon during the falling process of the weight and can conveniently adjust the opening degree of the balance valve.

Description

technical field [0001] The invention relates to a hydraulic valve, in particular to a hydraulic control balance valve used for a lifting mechanism in a hydraulic circuit of a crane system. Background technique [0002] In modern engineering machinery, construction machinery and other mechanical equipment, a large number of hydraulic load-bearing systems are used, among which the balance valve is the key hydraulic component of this type of system, and its performance directly affects the performance of the whole machine. The existing hydraulic balance valve mainly Including single-stage balance valve and pilot balance valve, its disadvantage is that when the hydraulic load-bearing system is descending with load, the valve core opening of the balance valve is difficult to stabilize at a certain size, causing the load to vibrate during the process of descending. The system is extremely unstable and seriously affects the safety and reliability of the whole machine. [0003] For...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 陈锦富谢万清
Owner 江苏鼎晟液压有限公司
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