Special high-precision intelligent pump for hydraulic torque wrench and method for controlling hydraulic torque wrench

Abstract

Disclosed are a special high-precision intelligent pump for a hydraulic torque wrench and a method for controlling the hydraulic torque. The special high-precision intelligent pump for the hydraulic torque wrench comprises a hydraulic unit, and the hydraulic unit consists of a hydraulic pump. The special high-precision intelligent pump is characterized by further comprising a control unit and an actuating unit, wherein the control unit comprises a processor, a pressure sensor and a data acquirer, the actuating unit comprises an electromagnetic selector valve and a pressure regulating valve, the pressure regulating valve, the pressure sensor and the electromagnetic selector valve are disposed on a main oil passage of the hydraulic pump, output pressure of the hydraulic pump is detected by the pressure sensor, the data acquirer acquires pressure signals detected by the pressure sensor, the pressure signals are acquired by the data acquirer and read by the processor, the processor further receives time signals acquired by the data acquirer, the processor output control signals to the electromagnetic selector valve according to comparison of the pressure signals and a set pressure threshold and the time signals, and accordingly reversing of the electromagnetic selector valve is controlled.

Description

technical field [0001] The invention relates to a hydraulic pump and a wrench control method, in particular to a hydraulic torque wrench special pump and a hydraulic torque wrench control method. Background technique [0002] The hydraulic torque wrench used for disassembling bolts and nuts in various occasions must have a hydraulic pump station to provide power during use. At present, the pressure regulating valves of these hydraulic pump stations need to be manually controlled, and the pressure regulation results need manual judgment. The result is that the accuracy and stability of the output pressure value of the hydraulic pump station are greatly affected by human beings. The reversing valves of these hydraulic pump stations either use manual reversing valves, or use electromagnetic reversing valves to be controlled by manual buttons, and all require one person to control the reversing valves at any time, which makes it difficult to automatically operate the hydraulic t...

AI Technical Summary

Problems solved by technology

[0002] The hydraulic torque wrench used for disassembling bolts and nuts in various occasions must have a hydraulic pump station to provide power during use. At present, the pressure regulating valves of these hydraulic pump stations need to be manually controlled, and the pressure regulation results need manual judgment. The result is that the accuracy and stability of the output pressure value of the hydraulic pump station are greatly affected by human

The reversing valves of these hydraulic pump stations either use manual reversing valves, or use electromagnetic reversing valves controlled by manual buttons, which require one person to control the reversing valves at any time, and it is difficult to automatically operate the hydraulic torque wrench

Some hydraulic torque wrenches add protruding parts to the outer contour of the hydraulic torque wrench, and add signal cables to realize automatic operation of the hydraulic torque wrench. The signal cable is broken, and what is more limited is that the hydraulic pump and ordinary hydraulic torque wrench cannot be used in common

Some hydraulic torque wrenches only use the trigger excitation of the proximity switch to realize the automatic operation of the hydraulic torque wrench. Although continuous automatic work is achieved, due to the complexity of the actual operating environment, the system itself cannot logically judge when the bolts are tightened. Or loosening, human judgment is required, and then the operating system is shut down. The use of this method greatly affects the tightening accuracy of the hydraulic torque wrench, and the efficiency is low, and it also reduces the service life of the hydraulic torque wrench

Some hydraulic torque wrenches are equipped with a heavier proportional valve, which also realizes the continuous work of the hydraulic torque wrench, but it cannot intelligently judge whether the bolt has reached the preset tightening torque, nor can it realize automatic shutdown

[0003] To sum up, the current technology must use a special hydraulic torque wrench or a special hydraulic pump station, and cannot intelligently control the automatic completion of the preset torque, nor can it realize the common use of hydraulic pump stations and ordinary hydraulic torque wrenches

Images