A support structure and a moving coil gas proportional valve with the support structure

Abstract

The invention provides a support structure. The support structure comprises a support rod and a sealing bowl arranged at one end of the support rod. The sealing bowl and the support rod are of a split structure. The support rod and the sealing bowl are each made of an aluminum material. The sealing bowl is mounted outside the end of the support rod in a sleeving manner and is in interference fit with the support rod. A conical plane is arranged at the sealing position outside the sealing bowl. The invention further provides a moving coil type fuel gas proportional valve. The moving coil type fuel gas proportional valve comprises a proportional valve body, a support assembly which is arranged in the proportional valve body in a sliding manner and can be sealed on a valve port of the proportional valve body, a moving coil assembly for driving the support assembly to move and an induction membrane for isolating the support assembly from the moving coil assembly. The support assembly is the support structure. The support structure and the moving coil type fuel gas proportional valve have the beneficial effects that the structure is light, control is easy, machining is quite convenient, strength and sealing performance are good, and the service life is long.

Description

Technical field [0001] The invention relates to a gas proportional valve, in particular to a bracket structure and a moving coil type gas proportional valve with the bracket structure. Background technique [0002] The gas appliance mainly relies on a moving coil gas proportional valve to control the gas flow, and the moving coil gas proportional valve mainly includes a proportional valve body, a valve that is slid in the proportional valve body and can be sealed in the proportional valve body A bracket assembly on the mouth, a moving coil assembly that drives the bracket assembly to move, and an induction diaphragm that separates the bracket assembly from the moving coil assembly. As the key component of the moving coil type gas proportional valve, the bracket assembly mainly includes a bracket rod and a sealing bowl arranged on one end of the bracket rod. The outer surface of the sealing bowl can generally contact the valve port in the moving coil type proportional valve. , Th...

AI Technical Summary

Problems solved by technology

The disadvantages of the support assembly of this structure are: 1. The strength of the support rod is not enough, and it is easy to break due to the pressure impact of the gas, thus affecting the performance of the moving coil gas proportional valve

2. The high temperature resistance of the sealing bowl is poor. Because the moving coil gas proportional valve is close to the stove, the temperature of the gas around the sealing bowl is also high, so the sealing bowl is easily deformed, and the seal between the sealing bowl and the valve port is not strong. Affects the performance of moving coil gas proportional valves

3. Because the steps for fixing the induction diaphragm need to be set on the bracket rod, and the grooves for installing the spring need to be set on the sealing bowl, the integrated structure makes the bracket rod and the sealing bowl cannot be processed separately, which is very inconvenient to process

4. The place where the outer surface of the sealing bowl is in contact with the valve port is generally a spherical surface, and the seal is a line seal, and the sealing effect is poor.

5. The material of the valve port of the general proportional valve body is made of aluminum, while the sealing bowl is made of plastic. Because the hardness of the valve port and the sealing bowl are inconsistent, the sealing bowl is easily worn and the service life is shortened.

Images