Hydraulic wrench multifunctional pump station
A hydraulic wrench, multi-functional technology, applied in the direction of wrench, fluid pressure actuating device, wrench, etc., can solve the problem of not being able to finish well
Active Publication Date: 2008-09-17
SHANGHAI UNIVERSITY OF ELECTRIC POWER +1
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Problems solved by technology
However, the above hydraulic wrench cannot be well completed when the corner method is used for construction.
Method used
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[0021] When the construction method of the bolt is given, the corresponding parameters in the hydraulic circuit can be set according to the given construction parameters to control the torque requirement of the torque method and the rotation angle requirement of the rotation angle method. For example, using the torque method construction requires the torque to reach the T value. The corresponding pressure p value can be obtained through the given torque T value, and the pressure value of the pressure switch is set to p. Start the switch button SB1, the relay KM1 can be powered continuously, start the torque method button SB3, can ensure that the relay KM2 is powered, and the relay KM3 is de-energized. At this time, the relay KM4 is de-energized, the start button SB5 is activated, the relay KM6 is energized, and the relay KM7 is de-energized. At this time, the relays KA1 and KA3 are energized, that is, the two-position four-way electromagnetic reversing valve 2 and the two-posi...
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The invention relates to a multi-functional hydraulic wrench pump station. A high pressure plunger pump is connected with a pump high-pressure oil supply system through a motor, a coupling and a vibration-proof cushion; the pressure relay of control switches is connected with a pressure measuring connector. The other joint of the pressure measuring connector is connected with a pressure measuring hose which is connected with a pressure gauge for displaying the current pressure value. A two-position two-way electromagnetic valve is connected with the pressure gauge and a flow meter which acquires the cumulative discharge of the cross section through an electronic flow meter of instrument control switch K2. The other ends of the flow meter and the check valve are connected with a port P of a two-position cross-joint electromagnetic valve; the oil inlet of the rod-less cavity end of the hydraulic oil cylinder is connected with the port A of the two-position cross-joint electromagnetic valve; the oil inlet of the rod cavity end of the hydraulic oil cylinder is connected with the port B of the two-position cross-joint electromagnetic valve; the oil inlet of the rod cavity end of the hydraulic oil cylinder is connected with the port B of the two-position cross-joint electromagnetic valve; the port T of the two-position cross-joint electromagnetic valve is connected with a return filter; the return filter is connected with the other end of the relief valve.
Description
technical field [0001] The invention relates to a hydraulic wrench, in particular to a pump station for a hydraulic wrench. Background technique [0002] Bolt is a commonly used and very important part in metallurgy, power plant, chemical industry, heavy assembly, petrochemical equipment, etc. Many parts are connected by bolts. In order to ensure the connection quality, the tightening state of high-strength bolts must be controlled. Nowadays, the methods used to control thread tightening mainly include torque method, rotation angle method, yield point method and bolt length method. Among them, although the bolt elongation method is the most accurate and reliable, it is difficult to realize in practice. The most commonly used methods are the torque method and the angle method. The torque method is a method formulated based on the relationship between the torque and the axial preload. This method was widely used in the early days of high-strength bolts, and it is still one ...
Claims
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Inventor 陈乃超李丽伟王海荣
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER