An alignment device for aligning the zero position of the multi-channel sampling valve body and the zero position of the grating code disc and its application method

Abstract

The invention discloses an alignment device used for aligning a zero position of a valve body of a multi-way sample valve with a zero position of a grating code disc and a using method of the alignment device. The alignment device comprises a base. A threaded hole is formed in the base and is used for fixing the multi-way sample valve. A red beam lamp is fixed to one end of the base through a beamlamp mounting base and right faces an inlet of the multi-way sample valve. A code disc positioning motor is mounted at the other end of the base. A shaft sleeve is mounted at the tail end of a shaftof the code disc positioning motor and is connected with the non-fixed grating code disc at the tail end of the multi-way sample valve. The grating code disc is driven by the code disc positioning motor to rotate. According to the alignment device for aligning the zero position of the valve body of the multi-way sample valve with the zero position of the grating code disc and the using method of the alignment device, a multi-way sample valve body driving motor drives the valve body to rotate, and the zero position of the valve body is positioned by observing a red light beam at an outlet of the valve body; the code disc positioning motor drives the grating code disc to rotate, and the zero position of the code disc is determined by reading a grating read head signal; and when the valve body reaches the zero position and the code disc also reaches the zero position, the grating code disc is fixed through a fastening screw, and alignment of the zero position of the grating code disc andthe zero position of the valve body is achieved.

Description

technical field [0001] The invention belongs to the field of rotary valve manufacturing, and in particular relates to an alignment device for aligning the zero position of a valve body of a multi-channel sampling valve and the zero position of a grating code disc and a use method thereof. Background technique [0002] The zero position of the grating code disc of the multi-channel injection valve is the benchmark for valve control, and the angular deviation between the zero position of the code disc and the zero position of the valve body will lead to insufficient injection or even blockage of the flow channel. At present, the method used to eliminate the influence of the zero position deviation of the multi-channel sampling valve is to mark the valve before assembly, align the zero position of the grating code disc and the zero position of the valve body by marking, or directly add the compensation angle in the control program to eliminate Zero position deviation, both meth...

AI Technical Summary

Problems solved by technology

[0002] The zero position of the grating code disc of the multi-channel injection valve is the benchmark for valve control, and the angular deviation between the zero position of the code disc and the zero position of the valve body will lead to insufficient injection or even blockage of the flow channel

At present, the method used to eliminate the influence of the zero position deviation of the multi-channel sampling valve is to mark the valve before assembly, align the zero position of the grating code disc and the zero position of the valve body by marking, or directly add the compensation angle in the control program to eliminate Zero position deviation, both methods need to add compensation coefficients in the injection valve control program, which not only increases the cost of the injection valve, but also causes redundancy in the control program, or even crashes

Images