Mechanical balance valve with foldable cantilever crane
A balancing valve and folding technology, applied in the field of balancing valve, can solve the problems of large action area of high-pressure oil, excessive stress on the main spool, affecting the service life, etc., to achieve low control pressure, reduce flow area, maintain flow stable effect
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[0019] The present invention will be further described below in conjunction with the accompanying drawings.
[0020] Although there are differences in the structures of different balancing valves, their main hydraulic structures are well known and achieve the same function. The balance mainly has three oil ports, such as figure 1 As shown in the schematic diagram of the balance valve, the first oil port A is the oil inlet port, and the second oil port B is the reverse load oil port; there is also a control oil port. When the first oil port is forwardly connected to the second oil port, the direction is cut off, and its one-way valve acts. When the load pressure of the control oil port is too large, there is a relief valve in the valve body to prevent pressure shock. By controlling the oil port, the first oil port A to the second oil port B can achieve different degrees of flow restriction, and the back pressure and load balance can be established in the load chamber of the s...
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