An electric ball valve

Abstract

The invention discloses an electric ball valve, which comprises a valve housing, a trunnion ball type spool, valve seats and a valve rod, the valve housing comprises a valve body and a sleeve, the trunnion ball type spool is provided with an inflow passage and an outflow passage, a motor is mounted on the sleeve, the valve body is provided with an inflow hole and two outflow holes, the an inflow connecting passage and an outflow connecting passage are arranged in the valve body, a flexible compensating part which can elastically deform to apply elastic force to tightly press the valve seat abuts against each valve seat, a screw plug abuts against each flexible compensating part, the valve seats are provided with first central holes, and the flexible compensating parts are provided with second central holes. Since the flexible compensating parts are mounted to compensate the trunnion ball type spool and the valve seats and compensation is self-adaptive as temperature and pressure change, the electric ball valve has good self-adaptability in compensation, consequently, the electric ball valve can meet the different working condition requirements of geological strata at different depths, and the long-term safe and reliable sealing of the ball valve under different working conditions is ensured.

Description

technical field [0001] The invention belongs to the field of ball valves, and more specifically relates to an electric ball valve. Background technique [0002] In occasions such as nuclear power plants, crude oil extraction, and natural gas extraction, it is necessary to control high-temperature and high-pressure fluids. The water flooding fracturing technology often used in crude oil extraction is a water flooding multi-stage fracturing technology that uses plugging balls to perform staged fracturing on different layers. The casting diameter of the plugging balls decreases from top to bottom, and the corresponding pipeline The diameter is also reduced. For example, the ball valve is used in it, and the valve-controlled multi-stage fracturing technology is adopted. Compared with the traditional fracturing technology, the operation is simple, and only the corresponding control signal is given to control the positive and negative rotation of the motor to realize the reversin...

AI Technical Summary

Problems solved by technology

[0009] (1) Due to the use of multiple disc springs stacked together for temperature, pressure and wear compensation, the volume of each disc spring is relatively large, resulting in an excessively large installation volume;

[0010] (2) It adopts a square structure, and the inlet and outlet are not arranged on the same end face, which is not conducive to the integration of pipeline installation and requires a large installation space. It is difficult to install the circular pipeline commonly used in the chemical industry such as Shiliu. Very good compatibility;

[0011] (3) The force generated by the compression amount of multiple disc springs is compensated, and the compression amount is selected according to the sealing requirements under high pressure conditions, which will inevitably cause excessive compensation force at low pressure, increase the friction force, and require a larger drive Power, but also accelerated the wear of the ball valve

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