CN2526728Y - Cunter-flow preventing water inlet device for water storage water heater - Google Patents
Cunter-flow preventing water inlet device for water storage water heater Download PDFInfo
- Publication number
- CN2526728Y CN2526728Y CN 02215723 CN02215723U CN2526728Y CN 2526728 Y CN2526728 Y CN 2526728Y CN 02215723 CN02215723 CN 02215723 CN 02215723 U CN02215723 U CN 02215723U CN 2526728 Y CN2526728 Y CN 2526728Y
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- China
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- water
- outer tube
- interior pipe
- water heater
- feed apparatus
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Abstract
The utility model relates to a reflux preventing water inlet device of a thermal storage type water heater. The device is arranged in the thermal storage type water heater and is provided with an inner bladder which is internally provided with a heating part, a water inlet device and a water outlet device that sends the water outside after heated. The device is characterized in that the water inlet device includes an inner tube, the lower end of which is provided with a water inlet entrance and the upper part of the inner tube is provided with a plurality of water inlet holes; an outer bushing sheathed outside the inner tube is provided with a venthole and the lower end of the outer bushing is provided with a water inlet exit; the inner tube and the outer bushing are fixedly connected together through a connecting piece and a clearance is formed between the inner tube and the outer casing; the connecting piece includes a connecting screw fixedly arranged at the upper end of the inner tube can seal up the upper end of the inner tube; a connecting nut is fixedly arranged at the upper end of the outer bushing; the outer bushing is fixedly connected with the inner tube through the spiro union between the connecting nut and the connecting screw, thereby no single-direction check valves are needed to be installed to prevent reflux. The utility model can also eliminate the weariness damage on the inner bladder material and a coat of the inner bladder material caused by heat expansion pressure.
Description
Technical field
The utility model relates to a kind of storage water heater's of being used for water feed apparatus, relates in particular to a kind of storage water heater's anti-backflow water feed apparatus.
Prior art
General commercially available storage water heater adopts a simple catheter as water inlet pipe, and it is shorter that water inlet pipe is made, and cold water flows into inner bag from the inner bag bottom, and hot water is ejected to top, and such arrangement is to use in order to be fit to.The shortcoming that the water heater of this structure exists is, when water system is cut off the water, when being opened to the mouth of a river, water storage can flow backwards to water supply network in the water heater liner, causes heater element to surface dry combustion method can take place.
For preventing that above-mentioned situation from taking place, one way stop peturn valve is installed in the employing that has additional on water inlet pipe, stop to flow backwards.But, when closing delivery port, during the inner bag sealing, heating inner bag water storage, water body expanded by heating in the inner bag, the thermal expansion stresses that causes inner bag to bear except that pressure of supply water can't discharge, go down for a long time, bigger to liner material and coating fatigue damage thereof, influence water heater liner service life.In addition, the easy fouling of one way stop peturn valve, fragile, after its spool and valve base sealing performance suffered wear-out failure, the non-return performance failure as untimely replacing, still flow backwards under the situation about can mention in the above.
Summary of the invention
The purpose of this utility model is to provide a kind of improved storage water heater's anti-backflow water feed apparatus, it not only can abandon the use one way stop peturn valve, and the heater element dry combustion method that can reliably prevent the inner bag water storage from flowing backwards when water system is cut off the water and cause discharges owing to heating produces the pressure of water body expansion to inner bag.
The purpose of this utility model is achieved in that
A kind of storage water heater's anti-backflow water feed apparatus is installed among the storage water heater, and this water heater has an inner bag, one heater element is set in this inner bag, and one is vertically set on the water feed apparatus in the inner bag, and, discharging device with heated hot water is sent is characterized in:
Described water feed apparatus comprises, an interior pipe, and interior pipe lower end is provided with several inlet openings for the water inlet inlet on the top of interior pipe; One is set in the outer outer tube of interior pipe, and the outer tube lower end is provided with a passage for water inlet exports on outer tube; Pipe is fixed together by connector with outer tube in described, and forms the gap between interior pipe and outer tube.
In above-mentioned storage water heater's anti-backflow water feed apparatus, wherein, described connector comprises, fixedly installing one on the pipe in described can be with the connecting screw rod of interior pipe upper end closed, in described outer sleeve upper, fixedly install an attaching nut, outer tube and interior pipe are fixed together by being spirally connected of attaching nut and connecting screw rod.
In above-mentioned storage water heater's anti-backflow water feed apparatus, wherein, the gap of described interior pipe and outer tube is the ring section, and interval area is long-pending greater than interior tube section inner headed face.
In above-mentioned storage water heater's anti-backflow water feed apparatus, wherein, the area sum of the inlet opening on pipe top is long-pending greater than the inner headed face of interior tube section in described being arranged on.
In above-mentioned storage water heater's anti-backflow water feed apparatus, wherein, the described passage area that is arranged on the outer tube is long-pending less than the inner headed face of interior tube section.
In above-mentioned storage water heater's anti-backflow water feed apparatus, wherein, the described passage horizontal level that is arranged on the outer tube is higher than minimum water inlet position.
The utility model storage water heater anti-backflow water feed apparatus makes it compared with prior art owing to adopted above-mentioned technical scheme, has following advantage and good effect:
1. therefore the utility model not only can improve the height of inlet opening owing to fix a sheathed outer tube outside interior pipe, prevents to flow backwards, and can guarantee that cold water upwards ejects hot water simultaneously from the inflow of inner bag bottom;
The utility model since with the area in gap between outer tube and the interior pipe greater than interior tube section area, simultaneously, the area sum of the inlet opening inner headed face greater than interior pipe cross section is amassed, can make so in the unobstructed inflow of the water water heater body inner bag;
3. the utility model is owing to be long-pending much smaller than the inner headed face of interior tube section with the setting of passage area, and the horizontal level setting of passage is the position that is higher than minimum inlet opening, therefore can effectively control the generation of siphon, overcome the phenomenon that the inner bag water storage flows backwards when water system is cut off the water.
Description of drawings
By the description of a following embodiment to the utility model storage water heater anti-backflow water feed apparatus, can further understand the purpose of this utility model, specific structural features and advantage in conjunction with its accompanying drawing.Wherein, accompanying drawing is:
Fig. 1 is applied in structural representation in the water heater according to the storage water heater's anti-backflow water feed apparatus that the utility model proposes;
Fig. 2 is the structural representation of the utility model storage water heater anti-backflow water feed apparatus.
The specific embodiment
See also shown in Figure 1, the utility model storage water heater anti-backflow water feed apparatus, it is installed among the storage water heater, this water heater has an inner bag 10, be provided with a heater element 20 in the inner bag 10, one is vertically set on the water feed apparatus 30 in the inner bag 10, and, the discharging device 40 that heated hot water is sent; The water inlet inlet 311 of water feed apparatus 30 and the lower outlet 401 of discharging device 40 stretch out outside the inner bag 10 and with extraneous associated components and are connected.
Please in conjunction with Fig. 1 referring to shown in Figure 2, the water feed apparatus 30 that is arranged on inner bag 10 comprises, pipe 31 in, interior pipe 31 lower ends are provided with several inlet openings 35 for water inlet inlet 311 on the top of interior pipe 31; Interior pipe 31 outer sheathed outer tubes 32, outer tube 32 lower ends are provided with a passage 36 for water inlet exports 321 on outer tube 32; In pipe 31 fixedly connected by connector 33 with outer tube 32, this connector 33 comprises, fixedly installing one in interior pipe 31 upper ends can be with the connecting screw rod 331 of interior pipe 31 upper end closeds, in the present embodiment, connecting screw rod 331 is to be welded on sleeve pipe 31 upper ends, in outer tube 32 upper ends, fixedly install an attaching nut 332,, thereby outer tube 32 and interior pipe 31 are fixed together by being spirally connected of attaching nut 332 and connecting screw rod 331; At this moment, between interior pipe 31 and outer tube 32, form gap 34; Form running water thus from 311 water inlets of water inlet inlet, through interior pipe 31, the gap 34 between inlet opening 35, interior pipe 31 and the outer tube 32, the outlet 321 of extremely intaking flows out to the path in the inner bag 10.
In the utility model, gap 34 between outer tube 32 inwalls and interior pipe 31 outer walls is an annular, and the tube section inner headed face was long-pending in the area of the cross section in gap 34 was not less than, simultaneously, the inner headed face of pipe 31 cross sections was long-pending in the area sum of inlet opening 35 was not less than, so that it is unobstructed to intake; In addition, passage 36 area settings are long-pending much smaller than the inner headed face in interior pipe 31 cross sections, and the horizontal level of passage 36 is higher than the position of minimum inlet opening 35, with the generation of effective control siphon.
The utility model is work like this:
Running water enters from interior pipe 31 bottoms water inlet inlet 311, gap 34 in inlet opening 35 enters between pipe 31 and the outer tube 32, flow out from the water inlet outlet 321 of outer tube 32 lower annular then, because water inlet outlet 321 areas of section are much larger than the area of passage 36, so overwhelming majority water inlet is flowed out from the water outlet 321 of intaking, thereby guarantee that cold water flows into from inner bag 10 bottoms, upwards ejects hot water; When water system is cut off the water, when being opened to the mouth of a river 401, the level height that is higher than minimum inlet opening 35 as water storage liquid level 1 in the water heater liner 10, the tendency of refluence is arranged, after liquid level 1 drops to passage 36 positions, there is gas to enter the gap 34 of outer tube 32 and interior pipe 31 from passage 36, form the gap liquid levels in the crack 34 during this time, destroyed siphon, this gap liquid level is equal, highly identical with outer tube 32 outside liquid level 1 suffered pressure; After liquid level 1 continued to drop to minimum inlet opening 35, inner bag 10 inner storing waters no longer flow backwards; The amount that inner bag 10 water storages flow backwards depends on the level height and the delivery port difference in level of minimum inlet opening 35, adjusts this difference in height, can reduce the water yield of refluence, does not even flow backwards, as long as heater element 20 still is positioned under the liquid level 1, just can not cause dry combustion method.
In sum, the characteristics of the utility model storage water heater anti-backflow water feed apparatus maximum are, water feed apparatus 30 need not adorned the one way stop peturn valve anti-backflow, close delivery port 401, inner bag 10 is open, the water storage in the heating inner bag 10, water body expanded by heating pressure in the inner bag 10, can discharge through water feed apparatus 30, thereby eliminate the fatigue damage of thermal expansion stresses inner bag 10 materials and coating thereof.
Claims (6)
1. storage water heater's anti-backflow water feed apparatus, be installed among the storage water heater, this water heater has an inner bag (10), one heater element (20) is set in this inner bag (10), one is vertically set on the water feed apparatus (30) in the inner bag (10), and the discharging device (40) with heated hot water is sent is characterized in that:
Described water feed apparatus (30) comprises, an interior pipe (31), and interior pipe (31) lower end is provided with several inlet openings (35) for water inlet inlet (311) on the top of interior pipe (31); One is set in the outer outer tube (32) of interior pipe (31), and outer tube (32) lower end is provided with a passage (36) for water inlet outlet (321) on outer tube (32); Pipe (31) is fixed together by connector (33) with outer tube (32) in described, and forms gap (34) between interior pipe (31) and outer tube (32).
2. storage water heater's anti-backflow water feed apparatus as claimed in claim 1, it is characterized in that: described connector (33) comprises, fixedly installing one on the pipe (31) in described can be with the connecting screw rod (331) of interior pipe (31) upper end closed, in described outer tube (32) upper end, fixedly install an attaching nut (332), with being spirally connected of connecting screw rod (331) outer tube (32) and interior pipe (31) are fixed together by attaching nut (332).
3. storage water heater's anti-backflow water feed apparatus as claimed in claim 1 is characterized in that: the gap (34) of pipe (31) and outer tube (32) is the ring section in described, and gap (34) area is long-pending greater than interior pipe (31) cross section inner headed face.
4. storage water heater's anti-backflow water feed apparatus as claimed in claim 1 is characterized in that: the area sum of the described inlet opening (35) that is arranged on interior pipe (31) top is long-pending greater than the inner headed face in interior pipe (31) cross section.
5. storage water heater's anti-backflow water feed apparatus as claimed in claim 1 is characterized in that: described passage (36) area that is arranged on the outer tube (32) is long-pending less than the inner headed face in interior pipe (31) cross section.
6. storage water heater's anti-backflow water feed apparatus as claimed in claim 1 is characterized in that: the described horizontal level that is arranged on the passage (36) on the outer tube (32) is higher than the position of minimum inlet opening (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02215723 CN2526728Y (en) | 2002-02-09 | 2002-02-09 | Cunter-flow preventing water inlet device for water storage water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02215723 CN2526728Y (en) | 2002-02-09 | 2002-02-09 | Cunter-flow preventing water inlet device for water storage water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2526728Y true CN2526728Y (en) | 2002-12-18 |
Family
ID=33694817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02215723 Expired - Lifetime CN2526728Y (en) | 2002-02-09 | 2002-02-09 | Cunter-flow preventing water inlet device for water storage water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2526728Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983015A (en) * | 2014-05-16 | 2014-08-13 | 李启明 | Backflow prevention and automatic venting structure of electric water heater |
-
2002
- 2002-02-09 CN CN 02215723 patent/CN2526728Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983015A (en) * | 2014-05-16 | 2014-08-13 | 李启明 | Backflow prevention and automatic venting structure of electric water heater |
| CN103983015B (en) * | 2014-05-16 | 2017-02-15 | 李启明 | Backflow prevention and automatic venting structure of electric water heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120209 Granted publication date: 20021218 |