Pressure-supplementing and pressure-releasing double control electromagnetic hydraulic valve
A hydraulic valve and pressure compensation technology, which is applied in the direction of fluid pressure actuation device, servo motor assembly, mechanical equipment, etc., to achieve the effect of high control accuracy, stable performance and improved safety.
Active Publication Date: 2011-04-13
CHTC CHUANG FENG HEAVY IND
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Problems solved by technology
At present, there is no electromagnetic hydraulic valve that can simultaneously realize the double control of pressure supplement and pressure relief in the prior art
Method used
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[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0015] refer to figure 1 and figure 2 :
[0016] In this example, a pressure supplement inlet 2 and a pressure relief outlet 3 are provided on the valve body 1. A sleeve 7 and a spring 8 are arranged between the cone valve 5 in the valve body and the inner end cover 4 of the valve body 1. The front end of the cone valve 5 is connected to the valve body. There is a valve gap 6 between the bodies, which can ensure that the cone valve 5 will move down under the action of the upper end sleeve 7 and the spring 8 after being worn, so as to ensure the running-in between the cone valve 5 and the valve body 1. There is an oil leakage recovery port 9 at the bottom of the gap 6 between the valves. On the cone valve, there are hydraulic oil pressure supplement channels 10 and pressure relief channels 11 in a cross shape, and the hydraulic oil flow channel 12 pas...
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The invention discloses a pressure-supplementing and pressure-releasing double control electromagnetic hydraulic valve, which comprises a valve body, a cone valve in the valve body, a cone valve connecting rod for connecting the valve body and the cone valve, a sleeve and a spring between the cone valve and an inner end cover, a piston in a cone valve control switch, a permanent magnet positionedat the front end of the piston, and a hydraulic oil channel communicated with a connecting channel of a hydraulic oil cylinder, wherein a cone valve driving rod connected with the cone valve connecting rod is connected with the end surface of the permanent magnet. The valve is characterized in that the outer wall of the hydraulic oil channel is wound with an electrified coil, the cone valve is provided with a hydraulic oil pressure-supplementing channel and a pressure-releasing channel which are crossways staggered, and the valve body is provided with a pressure-supplementing inlet and a pressure-releasing outlet of hydraulic oil. The valve has the bidirectional conduction function of selectively performing pressure supplementing and pressure releasing, can ensure the stability of the pressure in the hydraulic oil cylinder, indirectly control the pressure in the hydraulic oil cylinder through the electric current, and ensure that the control precision is higher and the performance is steadier; and the valve improves the safety of the operation of the hydraulic oil cylinder.
Description
technical field [0001] The invention relates to an electromagnetic hydraulic valve, in particular to a dual-control electromagnetic hydraulic valve for pressure supplementation and pressure relief. Background technique [0002] The traditional hydraulic valve is a one-way valve composed of valve body, piston, spring and other components. It relies on the elastic force of the spring to control the on-off of the hydraulic oil channel and then the pressure in the hydraulic cylinder. Since the spring is a component that is prone to fatigue and failure, this control method is unstable, especially when the spring is used for a long time. After use, its accuracy will be greatly reduced, so that the error of the one-way valve in the hydraulic control process will be too large, or even fail. 00221193.9 discloses an electromagnetically controlled hydraulic valve, which consists of a valve body, a valve seat, a slide valve, an armature, a magnetic sleeve and an electromagnet. However...
Claims
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IPC IPC(8): F15B13/044
Inventor 曾广胜刘跃军江太君石璞
Owner CHTC CHUANG FENG HEAVY IND