Pneumatic pressurization transformation of the hot

C142 sizing machine pneumatic pressurization transformation

g142 sizing machine uses spring pressurization to control the grouting force. Adjusting the grouting force can only be adjusted by experience. The pressure is often too large or too small, or the pressure at both ends of the same grouting roller is inconsistent, and the pressure of the pressurizing spring will decrease after long-term use, resulting in inaccurate pressurization

after repeated research, we have designed a set of improvement schemes, which can achieve the following results: different pressures can be set for the front and rear pressure rollers, and low pressure can be matched when the sizing machine is at low speed, 3 When detecting micro damage or even non-destructive high-speed, in combination with high pressure, the front grouting roller can be set with low-pressure grouting force P1 and high-pressure grouting force P2, and the rear grouting roller can be set with low-pressure grouting force P3 and high-pressure grouting force P4, and the residual pressure will be used to automatically lift the grouting roller in case of sudden power failure

the electrical control schematic diagram after transformation is shown in Figure 1

in Figure 1, Sal, SA2, SA3 are rotary buttons, D1, D2, D3, D4 are solenoid valves, HLL and HL2 are indicator lights. KML in the dotted box is the idle contactor contact of the sizing switch box, and km2 is the contactor contact of the main machine of the sizing switch box. The circuit is simple, and only two power lines and three control lines are required

close the power supply Sal, SA2, 1 It is specified that the pulse test method SA3 is opened to automatic state, SA2 is closed to manual low pressure state, and SA2 and SA3 are closed to manual high pressure state at the same time. In the automatic state, when KML is switched on at a slow speed, D1 and D2 solenoid valves are powered on to the low pressure state. When KML is switched on at the same time in the product detection link, km2 is switched on at a fast speed, and all solenoid valves are powered on to the high pressure state

description of working principle of pneumatic pressurization:

(1) when there is air pressure in case of power failure, the cylinder drives the pressure roller to lift

(2) when D1 and D2 solenoid valves are powered on, D3 manufacturer should add corresponding control system. When D4 is not powered on, the cylinder enters low pressure state

(3) when D3 and D4 solenoid valves are powered on and D1 and D2 solenoid valves continue to be powered on, the cylinder enters a high pressure state

(4) when D3 and D4 solenoid valves lose power, the cylinder enters the low pressure state again. D3 and D4 solenoid valves lose power and are powered on, which is the switching between low pressure and high pressure

(5) as long as the power is cut off or turned off, the cylinder will lift

(6) four pressures P1, P2, P3 and P4 can be obtained by adjusting the pressure regulating valve. When the cylinder is lifted or lowered, it is not synchronized, and the one-way throttle valve can be adjusted

the first sizing machine of our company has been used for more than seven months after the transformation, and the sizing qualification rate has been significantly improved, and the defects such as sizing spots and light sizing have been significantly reduced. This transformation technical measure has been popularized and applied in our company