CN2235532Y

CN2235532Y - Safety combination valve for feeding water into water heater

Info

Publication number: CN2235532Y
Application number: CN 95229827
Authority: CN
Inventors: 徐忠
Original assignee: WENZHOU WATER HEATER GENERAL FACTORY
Current assignee: WENZHOU WATER HEATER GENERAL FACTORY
Priority date: 1995-12-29
Filing date: 1995-12-29
Publication date: 1996-09-18
Anticipated expiration: 2005-12-29

Abstract

The utility model relates to a safe combined valve for feeding water into a water heater, wherein, an inlet valve is composed of a valve seat, a valve core, a valve rod, a sealing gasket, a valve core spring and a spring supporting disk, wherein, the valve rod is integrated with the valve core and the lower end of the valve rod is tightly matched with a central hole of the sealing gasket. The periphery of the valve core is uniformly distributed with semi-cylinder or hemispherical bosses of which the end faces are provided with small pressure-relieving holes. The design makes the surfaces of the valve core and the valve body changed into line or point contacts to avoid the tilting placing phenomenon when the valve core is assembled, and a pressure-relieving valve composed of the valve rod, small pressure-relieving holes and the sealing gasket has the advantages of simple structure, easy assembly and good tightness. So the utility model has the advantage of reliable operation.

Description

The water inlet safety combined valve of water heater

The utility model relates to a kind of water inlet safety combined valve of water heater.

The valve body of combinations thereof valve is made up of straight-through tube and bypass tube, inlet valve is arranged in the straight-through tube, safety valve is arranged in the bypass tube, and also be provided with the Decompression valves of forming by valve rod and valve rod spring in the inlet valve, wherein valve stem casing is contained in the center trepanning of the spool of inlet valve and sealing gasket, the two ends of valve rod spring then are bearing in the upper-end surface of spool and are located on the spring seat of valve rod, and under the effect of valve rod spring, the valve gap that just will be located at the valve rod lower end has been pressed on the lower end surface of sealing gasket.In the assembling of this Decompression valves, the installation of valve rod spring is cumbersome, and the end face of spring seat must design very little, spring could be put into, but, design makes that again the supporting of valve rod spring is unreliable like this, in case spring is deviate from spring seat and lost supporting, valve gap will break away from sealing gasket automatically, at this moment, Decompression valves promptly becomes return port, current in the water tank are lost, and in addition, also there is same problem in inlet valve, this is because spool is smaller with the matching gap of straight-through tube, the thickness of spool is thinner again, and the tube wall that adds straight-through tube is processed more coarse sometimes, thus the situation that causes spool to incline easily and put when mounted, like this, sealing gasket also just can not be pressed on the valve seat fully.

The purpose of this utility model provides a kind of water inlet safety combined valve of water heater of reliable operation.

Solving scheme of the present utility model is that described inlet valve is made up of valve seat, spool, valve rod, sealing gasket, valve core spring and spring-loaded dish, wherein valve rod fuses with spool, insert in the center hole of spring-loaded dish its upper end, the lower end is sealed and matched with the center hole of sealing gasket, the periphery of spool is provided with that be uniformly distributed along the circumference and radially overhanging boss, the end face of spool is provided with pressure release aperture and circumferential pod apertures, and the two ends of valve core spring then are bearing in respectively on the end face of spool and spring-loaded dish.

The essence of above-mentioned solution is spool to be cooperated with the face of straight-through tube tube wall to become be the contact of some lines or point, so both increased the water conservancy diversion area of inlet valve, phenomenon is put in inclining of having avoided again that spool may occur when assembling, in addition, after valve rod fused with spool, come down to have constituted Decompression valves by valve rod, pressure release aperture and sealing gasket, this pressure-relief valve structure is simple, assembling easily, can be because of not assembling former thereby occurring leaking, therefore, combination brake switch and proporting described in the utility model has overcome the existing problem of known combination brake switch and proporting, reliable operation.

Illustrate particular content of the present utility model below in conjunction with drawings and Examples.

Fig. 1: structural drawing of the present utility model;

Fig. 2: the plan view of spool.

As shown in the figure, the water inlet safety combined valve of water heater described in the utility model has valve body, inlet valve and safety valve, wherein valve body is made up of straight-through tube 1 and bypass tube 2, inlet valve is located at the lower end mouth of straight-through tube 1, safety valve is located in the bypass tube 2, and inlet valve is by valve seat 3, spool 4, valve rod 5, sealing gasket 6, valve core spring 7 and spring-loaded dish 8 are formed, wherein valve rod 5 fuses with spool 4, insert in the center hole 9 of spring-loaded dish 8 its upper end, the lower end is sealed and matched with the center hole of sealing gasket 6, the periphery of spool 4 is provided with that be uniformly distributed along the circumference and radially overhanging boss 10, the end face of spool 4 is provided with pressure release aperture 11 and circumferential pod apertures 12, and the two ends of valve core spring 7 then are bearing in respectively on the end face of spool 4 and spring-loaded dish 8.Described boss 10 can be half-cylindrical, and this moment, boss 10 was the line contact with the tube wall of straight-through tube 1, and boss 10 also can be a hemisphere, and this moment, boss 10 was a contact with the tube wall of straight-through tube 1, and pressure release aperture 11 generally is provided with near valve rod 5.Act on hydraulic pressure on the sealing gasket 6 when surpassing setting value by pressure release aperture 11, sealing gasket 6 will be out of shape downwards, and destroy valve rod 5 and make water flow back into intake pipe in the case with being sealed and matched of center hole of sealing gasket 6, play the effect of Decompression valves.Described safety valve adopts the current techique design, form by valve seat 13, sealing gasket 14, spool 15, valve core spring 16, cock 17 and discharge orifice 18, turn cock 17, the spring force of adjustable valve core spring 16, reach the adjustable purpose of safety pressure, in addition, present embodiment is designed to detachable type with bypass tube 2, form by body tube that is threaded and detachable pipe, unload detachable pipe, combination brake switch and proporting just becomes a water outlet, when cutting off the water, can hot water in the case be emitted use by this measure, thereby avoid waste of electric energy.

Claims

1, a kind of water inlet safety combined valve of water heater, has valve body, inlet valve and safety valve, wherein valve body is made up of straight-through tube and bypass tube, inlet valve is located at the lower end mouth of straight-through tube, safety valve is located in the bypass tube, it is characterized in that: described inlet valve is by valve seat (3), spool (4), valve rod (5), sealing gasket (6), valve core spring (7) and spring-loaded dish (8) are formed, wherein the same spool of valve rod (5) (4) fuses, insert in the center hole (9) of spring-loaded dish (8) its upper end, the center hole of the same sealing gasket in lower end (6) is sealed and matched, the periphery of spool (4) is provided with that be uniformly distributed along the circumference and radially overhanging boss (10), the end face of spool (4) is provided with pressure release aperture (11) and circumferential pod apertures (12), and the two ends of valve core spring (7) then are bearing in respectively on the end face of spool (4) and spring-loaded dish (8).

2, the water inlet safety combined valve of water heater according to claim 1 is characterized in that: described boss (10) is half-cylindrical.

3, the water inlet safety combined valve of water heater according to claim 1 is characterized in that: described boss (10) is a hemisphere.