A torque self-adaptive two-way non-stall screw motor valve

Abstract

The invention relates to a torsion self-adaptive bidirectional non-blocking screw motor valve. It is characterized in that the motor gear is set on the output shaft of the motor and meshes with the large gear at the lower part of the double gear, the transmission gear is set on the transmission screw and meshes with the small gear at the upper part of the double gear, and the limit of the transmission screw is set on the upper support plate and Between the lower support plates and the upper part of the transmission screw protrudes from the upper support plate to cooperate with the valve seal assembly; the transmission gear is provided with an internal thread, and the transmission screw is provided with a section of thread that matches the internal thread of the transmission gear; the external connection of the transmission screw is provided An upper spring and a lower spring, the upper spring is located between the transmission gear and the upper support plate, and the lower spring is located between the transmission gear and the lower support plate. The transmission gear compresses the spring to achieve a balance between the spring pressure and the axial load of the transmission screw before driving the transmission screw to rotate to realize the torque adaptive to different air pressure conditions, so as to control the process of motor current rise more gently, and further protect the life of the motor.

Description

technical field [0001] The invention relates to a torsion self-adaptive bidirectional non-blocking screw motor valve. Background technique [0002] Smart gas meters usually use motor valves as actuators to control the opening and closing of gas meters, which is a key safety component. At present, the common motor valves are: [0003] 1. Blocking transformation motor valve, for details, please refer to the authorized announcement number CN201339750Y. [0004] A motor valve for a gas meter; this type of motor valve is blocked by the motor after the on-off valve is in place, which affects the service life of the motor. Due to the motor stall, the current increases, which also increases the battery energy consumption of the smart gas meter, which affects the life of the motor. The service life of the battery increases the cost. [0005] 2. One-way non-blocking transformation motor valve, for details, please refer to the authorized announcement number CN207349448U, a kind of on...

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Problems solved by technology

[0004] A motor valve for a gas meter; this type of motor valve is blocked by the motor after the on-off valve is in place, which affects the service life of the motor. Due to the motor stall, the current increases, which also increases the battery energy consumption of the smart gas meter, which affects the life of the motor. battery life, increased cost

[0005] 2. One-way non-blocking transformation motor valve, for details, please refer to the authorized announcement number CN207349448U, a one-way non-blocking smart gas meter built-in motor valve; this type The motor valve can only realize one-way non-blocking, and the non-blocking mechanism adopts the ratchet and L-shaped elastic pawl mechanism to realize non-blocking. Repeated friction of the ratchet will cause the ratchet to wear or break, or the L-shaped elastic ratchet will break or fail elastically, which will lead to the failure of the motor valve switch valve, which is a great safety hazard for users;

[0006] 3. Two-way non-blocking transformation motor valve, for details, please refer to the authorized announcement number CN203453585U special cut-off valve for bidirectional non-blocking gear transmission gas meter; this type of valve adopts The structure of torsion spring and detachment realizes no stalling, and its structure is complex, and because the structure of torsion spring and detachment is poor in anti-vibration, there is a risk of abnormal valve opening and closing of the valve, causing leakage, and there are potential safety hazards

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