Gas meter motor valve

Abstract

The invention discloses a gas meter motor valve comprising a valve assembly and a motor assembly. The valve assembly comprises a valve body, a nut and a screw. The valve body is provided with an air inlet and an air outlet. A seal part, the nut and the screw are arranged in the valve body. The nut is connected with the screw. The motor assembly comprises a valve seat, a motor and a transmission gear set. The motor and the transmission gear set are arranged in the valve seat and are in transmission connection. The transmission gear set is in transmission connection with the screw. The valve body is fixedly connected with the valve seat. The valve assembly further comprises a first seal part and a second seal part. The nut is connected to the screw through threads. The nut is provided with afirst stopping face. The screw is provided with a second stopping face. The first seal part is fixedly connected with the nut. The second seal part is located between the valve body and the valve seat. The gas meter motor valve has the characteristics of being simple and reasonable in structure, good in use effect, long in service life and good in sealing property, self locking does not occur between the screw and the nut, the motor valve is closed normally, and potential safety hazards are avoided completely.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a gas meter motor valve. Background technique [0002] Smart gas meters usually use motor valves as actuators to control the opening and closing of gas meters. At present, the structure of the common intelligent gas meter motor valve mainly includes valve body, valve seat, motor, reduction gear set, screw and sealing cover. The valve body is fixedly connected with the valve seat, and the motor and reduction gear set are installed in the valve seat correspondingly. The top of the screw rod is connected to the sealing cover through a nut, the bottom of the sealing cover is fixed in the valve body, the bottom end of the screw rod is connected to the reduction gear set, and the top of the valve body is provided with a valve port corresponding to the sealing cover. When working, the motor drives the screw to rotate through the reduction gear set, and then drives the sealing cover to m...

AI Technical Summary

Problems solved by technology

[0003] Yet the defect of above-mentioned gas meter motor valve is: the first, sealing cover is an integral structure, and one end of sealing cover is fixed, and the other end moves with screw rod, thereby causes valve to open and close once, and sealing cover will expand and contract once thereupon, makes sealing cover Long-term expansion and contraction is easy to cause damage and affect its service life. Second, when the sealing cover is opened and closed, positive pressure and negative pressure are generated due to the change of the shape and volume of the sealing cover, which changes the resistance and affects the valve action; third. , because the external thread of the screw will form an undercut groove during processing, when the motor valve is in place when the valve is opened (that is, the valve is opened), the internal thread of the nut will be screwed into the undercut groove, so that there will be a gap between the nut and the screw due to Large friction torque is generated to self-lock. When the motor provides low power to close the valve (that is, to close the valve), this friction torque may cause the screw and the nut to be stuck, so that the valve closing function of the motor fails. cause safety hazard

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