A gas proportional control device
A proportional control and gas technology, applied in the direction of valve device, valve operation/release device, function valve type, etc., can solve the problems of difficult control and complicated process, so as to reduce process difficulty, reduce contact area, and reduce flow return poor effect
Active Publication Date: 2016-04-20
GUANGZHOU JINGDING ELECTRIC TECH
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However, this surface treatment process is more complicated and difficult to control
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[0019] The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all the connection / connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.
[0020] refer to Figure 2 to Figure 5 , a gas proportional control device, which includes a proportional valve ...
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The invention discloses a fuel gas proportional control device which comprises a proportional valve body, a valve core component, a diaphragm, a locking plate, an upper cover, a moving core component, a guide pipe, a proportional spring, an adjusting nut and a proportional valve coil assembly. The moving core component is sleeved in the guide pipe, a clearance is reserved between the outer wall of the moving core component and the inner wall of the guide pipe, two ends of the moving core component are sleeved in a first guide ring and a second guide ring respectively, and the second guide ring is positioned above the first guide ring. Frictional force applied to the moving core component during moving is turned from conventional frictional force between the guide pipe and a moving core in the moving core component into frictional force between two ends of the moving core component and each of the first guide ring and the second guide ring, friction contact area is reduced, coefficient of friction between two ends of the moving core component and each of the first guide ring and the second guide ring is quite small, and flow return difference in adjusting can be decreased. Surfaces of the guide pipe and the moving core of the moving core component only require simple surface treatment, so that technical difficulty is greatly lowered, and cost is reduced.
Description
technical field [0001] The invention relates to a gas proportional control device used in gas appliance control systems such as gas water heaters, gas wall-hung boilers, and gas boilers. Background technique [0002] The moving iron core gas proportional control device is a key part of the automatic control gas appliance. The moving iron core gas proportional control device currently used in the market is as follows: figure 1 : Due to the working of the proportional control device, the moving core moves up and down in the conduit under the action of the magnetic field force generated by the electromagnetic coil, thereby promoting the movement of the valve core assembly. The amount of gas is controlled; the friction between the conduit and the moving core has a great influence on the hysteresis of the adjustment characteristics of the control device. In order to reduce the influence of friction on the hysteresis, the moving core and the conduit are usually Special surface tr...
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IPC IPC(8): F16K17/20F16K31/06
CPCF16K1/00F16K31/0655F16K31/0675
Inventor 庞智勇姚占朋桂检仔
Owner GUANGZHOU JINGDING ELECTRIC TECH