CN2508174Y - Safety valve backflow device of electric water heater - Google Patents
Safety valve backflow device of electric water heater Download PDFInfo
- Publication number
- CN2508174Y CN2508174Y CN 01254408 CN01254408U CN2508174Y CN 2508174 Y CN2508174 Y CN 2508174Y CN 01254408 CN01254408 CN 01254408 CN 01254408 U CN01254408 U CN 01254408U CN 2508174 Y CN2508174 Y CN 2508174Y
- Authority
- CN
- China
- Prior art keywords
- backflow
- safety valve
- electric water
- water heater
- pressure regulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Safety Valves (AREA)
- Details Of Fluid Heaters (AREA)
Abstract
The utility model belongs to an improved electric water heater safety valve backflow device. On the basis of the original backflow mechanism, a backflow valve lever is extended out the outside of a pressure regulating cover to be made into a cone shaped convex column, in this way, the backflow valve lever can be limited, under the function of the pressure difference, the backflow valve lever freely telescopes the stroke, thereby ensuring that the backflow valve lever does not break away the pressure regulating cover whether the pressure in a pipeline changes or not, thereby guaranteeing the normal operation of the safety valve. The utility model has the advantages that the structure is simple, the service life is long, the backflow pressure is stable, etc., and thereby the utility model is suitable for assembling on the safety valve of a variety of models of electric water heaters.
Description
The utility model relates to the backflow mechanism in a kind of electric water heater safety valve.
Existing electric water heater safety valve generally includes valve body, places the check-valves that is made of setting-out pad, check spring, pressure regulating cover in the valve body and is combined in the backflow mechanism that check-valves is made of return valve seat, backflow valve rod, reflux spring.Because the backflow valve rod freely is applied on the pressure regulating cover centre bore, when hydraulic pressure in the pipeline changes suddenly, reduce as pressure, the backflow valve rod will have bigger displacement.If the backflow valve rod has broken away from pressure regulating cover, in reseting procedure, just be difficult for importing again the pressure regulating cover centre bore, like this, cause the check-valves disabler on the one hand, influenced the water flow of water heater, and when taking place, cause the electrothermal tube dry combustion method easily, so that can not normally use when cutting off the water supply.On the other hand, check spring, the long-time pressurized of reflux spring, often can not be extensive the position, what lost spring should be flexible, and significantly reduced the service life of whole safety valve.
The electric water heater safety valve reflux that provides a kind of valve rod not dislocate is provided the purpose of the utility model.Its technical scheme is achieved in that it is on the basis of original structure, the top of backflow valve rod is made with spacing projection, like this, can limit the stroke that the backflow valve rod freely stretches under the effect of pressure reduction, thereby guaranteed the backflow valve rod no matter how pressure changes in the pipeline, do not broken away from pressure regulating cover.
The utility model compared with prior art, it has simple in structure, long service life, the stable advantage by the time of return pressure.
Below in conjunction with embodiment shown in the drawings, the utility model is described in further detail.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is that the utility model places the structural representation on the electric water heater safety valve.
Referring to Fig. 1, Fig. 2, the electric water heater safety valve reflux comprises setting-out pad 6, return valve seat 5, pressure regulating cover 2 and is applied in the backflow valve rod 1 on setting-out pad 6, return valve seat 5, pressure regulating cover 2 centre bores and is enclosed within check spring 3, reflux spring 4 on the backflow valve rod 1.Check spring 3 two ends withstand on respectively on pressure regulating cover 2 and the return valve seat 5, and the two ends of reflux spring 4 withstand on respectively on the boss 1b and return valve seat 5 of backflow valve rod 1 centre.On the water inlet 7a of valve body 7, pressure regulating cover 2 is threaded in valve body 7 delivery ports setting-out pad 6, has apopore 2a on it by check spring 3 roof pressures; Backflow valve rod 1 bottom has envelope platform 1d, under the normal condition, under the effect of reflux spring 4, by the centre bore of involution at setting-out pad 6; Backflow valve rod 1 lower external face is provided with backflow tooth 1c, and middle and top is respectively equipped with positive stop lug boss 1b, the projection 1a of taper, and the maximum outside diameter of projection 1a and boss 1b is greater than the centre bore internal diameter of pressure regulating cover 2.Like this, can make the 1 spacing slippage within the specific limits of return valve bar, and not break away from pressure regulating cover 2.
Operation principle of the present utility model is such: when the pressure in the electric heater when pressure on the safety valve water inlet 7a pipeline equates, the envelope platform 1d of setting-out pad 6 and backflow valve rod 1 is under the effect of check spring 3 and reflux spring 4, and involution is on aperture separately; When the rising of the temperature in the electric heater, when pressure rises to the value of setting, backflow valve rod 1 is backed down, and at this moment, hot water flows back in the pipeline by backflow tooth 1c.During this time, much no matter the gland between water heater and the pipeline has, because backflow valve rod 1 has spacing projection 1a,, thereby guaranteed the normal use of safety valve so backflow valve rod 1 can not break away from pressure regulating cover 2.
Claims (2)
1, a kind of electric water heater safety valve reflux, comprise setting-out backing (6), return valve seat (5), pressure regulating cover (2) and be applied in setting-out pad (6), return valve seat (5), backflow valve rod (1) on pressure regulating cover (2) centre bore and be enclosed within check spring (3) on the backflow valve rod (1), reflux spring (4), check spring (3) two ends withstand on respectively on pressure regulating cover (2) and the return valve seat (5), the two ends of reflux spring (4) withstand on respectively on backflow valve rod (1) and the return valve seat (5), it is characterized in that: backflow valve rod (1) stretches out the top of adjusting lid (2) and is provided with spacing projection (1a).
2, according to the described electric water heater safety valve reflux of claim 1, it is characterized in that: spacing projection (1a) is the garden taper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01254408 CN2508174Y (en) | 2001-10-26 | 2001-10-26 | Safety valve backflow device of electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01254408 CN2508174Y (en) | 2001-10-26 | 2001-10-26 | Safety valve backflow device of electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2508174Y true CN2508174Y (en) | 2002-08-28 |
Family
ID=33663731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01254408 Expired - Fee Related CN2508174Y (en) | 2001-10-26 | 2001-10-26 | Safety valve backflow device of electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2508174Y (en) |
-
2001
- 2001-10-26 CN CN 01254408 patent/CN2508174Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |