Electric motor valve

Abstract

The invention discloses a motor valve which is mainly used for opening or closing control of various intelligent gas meters. The motor valve comprises a valve body, a valve cover and an execution component; the valve body is provided with an air inlet and an air outlet; the valve cover is arranged at the air outlet side; the execution component is connected with the valve cover; the motor valve is characterized in that: the valve body is an unfilled-corner rectangular valve body; the air outlet of the valve body is an oblique air outlet; the valve cover adopts a turnover typed valve cover; when the valve cover of the motor valve is opened, the airflow linearly passes through the valve body; therefore, the minimum pressure loss and maximum flux can be obtained, the motor valve overcomes the defects of large air pressure loss and unreliable switching action existing in the prior art and has the advantages of reasonable structure, reliable switching, large flux, low pressure loss, and the like.

Description

technical field [0001] The invention relates to an on-off valve, in particular to a motor valve, which is mainly used for opening or closing control of various intelligent gas meters. Background technique [0002] Smart gas meters use motor valves as actuators to control the opening and closing of gas meters. Generally, civilian smart gas meters use screw-type or trip-type built-in motor valves when the space inside the meter is relatively limited. see figure 1 , figure 2 The prior art built-in motor valve includes a valve body 1', a valve cover 2' with a rubber bellows 21' and a motor gearbox 3', and the valve body 1' is provided with an air inlet 11' and an air outlet 12', with The valve cover 2' of the rubber bellows 21' is installed in the valve body 1', the executive assembly is installed in the motor gearbox 3', and the executive assembly is connected with the valve cover 2' with the rubber bellows 21'. The motor valve has the following defects when used: 1. Since ...

AI Technical Summary

Problems solved by technology

The motor valve has the following defects when used: 1. Since the air inlet 11' and the air outlet 12' are at an angle of 90° and are not in a straight line, the air passage of the motor valve is not smooth, and the motor installed on the gas meter inlet port The valve actually adds a local pressure loss to the gas meter, and its pressure loss value is proportional to the gas flow rate, that is, the gas flow rate, which increases the total pressure loss of the gas meter and affects the performance and accuracy of the gas meter; 2. Motor Most of the working state of the valve is in the open state, and the bellows of the rubber valve cover is in a compressed state for a long time. The gas contains high-molecular alkanes with high viscosity, which will self-polymerize into hard high-molecular polymers at a certain time and temperature. When it is glued to the bellows of the rubber valve cover, the motor valve cannot be closed normally, especially for the spring-closed tripping motor valve, the problem of lax valve closing or even failure to close the valve is more serious, resulting in long-term stability of the motor valve. work affected

Yet the two major defects that aforementioned prior art motor valve exists still fail to fundamentally overcome

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