CN101988510A - Canned motor pump with check valve - Google Patents
Canned motor pump with check valve Download PDFInfo
- Publication number
- CN101988510A CN101988510A CN2009100556238A CN200910055623A CN101988510A CN 101988510 A CN101988510 A CN 101988510A CN 2009100556238 A CN2009100556238 A CN 2009100556238A CN 200910055623 A CN200910055623 A CN 200910055623A CN 101988510 A CN101988510 A CN 101988510A
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- China
- Prior art keywords
- pump
- check valve
- canned motor
- safety check
- pump body
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- 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.)
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Abstract
The invention discloses a canned motor pump with a check valve. The canned motor pump consists of a pump body and a canned motor connected with the pump body, wherein the pump body is provided with the check valve for preventing liquid from flowing back; the check valve is arranged at the outlet of the pump body, and consists of a check valve cap, a gasket, a spring, a valve plug and a seal ring; the states of the valve plug and the gasket are controlled by hydraulic pressure; and the seal ring on the check valve is fixed on the inner wall of the outlet of the pump body. The canned motor pump greatly ensures that liquid heating equipment cannot be damaged due to liquid flowing back and dry burning caused by no water supply or pump failure, ensures that when the pump body has cracks, the leakage cannot occur so as to avoid harm to human bodies and environmental pollution, and a circulation loop medium passes through a gap between a stator can and a rotor can to sufficiently lubricate a thrust bearing, a ceramic shaft and a ceramic bearing, reduce wear rate and noise and greatly prolong the service life of the canned motor pump.
Description
Technical field
The present invention relates to a kind of equipment for liquid transportation, particularly be a kind of shielded electric-pump that is applicable to industries such as solar energy, boiler, medicine, chemical industry, oil, refrigeration.
Background technique
The shielded electric-pump of present commonplace use is the centrifugal pump that impeller is installed, the impeller quantity of this centrifugal pump is directly proportional with lift, increase along with the increasing of lift, but when impeller is increased to certain quantity and reaches capacity in its limited space after, its lift also along with obtaining qualification, can not adapt to high-lift needs.Be extensive use of a kind of screw pump in refrigeration and chemical industry; be used for carrying and have corrosive, hypertoxic, radioactive liquid; its structure be pump housing inner screw with the rotatingshaft of motor between be connected by the axle envelope; after this axle is enclosed in long use; can be aging damaged; need uninterrupted the shutdown to change or repair; increased maintenance cost; reduced working efficiency; otherwise can cause generation leak of liquid when carrying liquid, and especially carry to have corrosivity, severe toxicity, radioactive liquid, both human body was damaged; befouling environment should not extensively be promoted again.And liquid heating apparatus cutting off the water or pump causes the liquid return dry combustion method when fault occurring easily, damages liquid heating apparatus, also can damage befouling environment to human body.
Summary of the invention
The present invention has overcome the aforesaid liquid heating plant and has cut off the water or pump causes the liquid return dry combustion method when fault occurring easily, damages liquid heating apparatus, human body is damaged shortcoming with befouling environment, and provide a kind of water outlet to have the shielded electric-pump of safety check.
To achieve these goals, the present invention realizes by the following technical solutions:
A kind of shielded electric-pump that safety check is installed, it is made up of with the shield electric machine that is connected with the pump housing the pump housing, also is provided with a safety check that prevents liquid return on this pump housing;
Described safety check is arranged on pump housing outlet port;
Described safety check is made up of safety check valve gap, liner, spring, spool and seal ring;
The state of described spool and liner is compressed into row control by liquid water;
Seal ring on the described safety check is fixed in pump housing outlet inwall.
The present invention has guaranteed that greatly liquid heating apparatus can not damage liquid heating apparatus because of cutting off the water or causing the liquid return dry combustion method during failure of pump; Guarantee when pump housing generation crackle, can not leak human body is damaged and befouling environment; And guaranteed effectively that by the last lower thrust-bearing that is provided with the impeller string quantity makes it be in the efficient that product has been guaranteed in normal working position; And the circulation loop medium makes thrust-bearing, porcelain shaft and ceramic bearing that enough lubricated rates that reduces wear mutually be arranged through the gap between stator can and the Rotor can, has reduced noise, has prolonged the working life of shielded electric-pump greatly.
Description of drawings
Describe the present invention in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is installed in structural representation on the shielded electric-pump for the present invention.
Fig. 2 is the structural representation of safety check.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
With reference to figure 1 and Fig. 2:
A kind of shielded electric-pump that safety check is installed, it is made up of with the shield electric machine 2 that is connected with the pump housing 1 pump housing 1, also is provided with a safety check 3 on this pump housing 1, and this safety check 3 is arranged on a side of pump housing outlet 4 by the fixing seal device; Water outlet place on safety check 3 also is provided with a usefulness, and this prevents the backflow device of liquid countercurrent; Safety check 3 is made up of safety check valve gap 5, check-valve spring 6, spool 7, liner 8 and seal ring 9 these several parts; Liner 8 on the safety check 3 and seal ring 9 are close to the pump housing by Sealing and are exported 4 places; The pump housing 1 is communicated in blade wheel chamber 10, and blade wheel chamber 10 is communicated in following screen board assembly 11; Ceramic bearing 12 on the following screen board 11 was arranged on liquid bath and was communicated in gap location between stator can 13 and the Rotor can assembly 14, gap between stator can 13 and the Rotor can assembly 14 crosses by being arranged on ceramic bearing 12 in the upper bearing bracket 15 that liquid baths are communicated with and upper bearing bracket inner chamber 16, upper bearing bracket inner chamber 16 be arranged on porcelain shaft 12 return ports and be communicated with impeller inlet 17 places.
When shielded electric-pump is worked, the magnetic field that shield electric machine 2 produces provides power to drive rotor operation, liquid is carried liquid from impeller inlet 17 pressurization backs to the pump housing 1 outlet, liquid exports 4 directions to the pump housing and moves to the spool 7 of safety check 3 back valve core 7 of exerting pressure, make spool 7 and liner 8 be separated from, liquid flows out pump housing outlet 4, when impeller does not rotate or the impeller operation back pump housing when exporting 4 pressure greater than the pressure of impeller outlet 17, spool 7 and liner 8 sealings, the liquid of pump housing outlet 4 just can not be back in the pump housing 1 like this.
When the present invention is applied to solar water heater system, shielded electric-pump is started working non-return valve core 7 is moved to water outlet 4 directions when solar water heater needs moisturizing, water filling in the water heater heating pipe, when shielded electric-pump do not work or pump housing import 19 lacks of water or pressure when being lower than the pump housing and exporting 4 water pressures safety check 3 be back in the shielded electric-pump pump housing 1 and the conduit pipeline with regard to stoping the water in the water heater heating pipe, guaranteed that solar water heater makes whole system lose efficacy because of anhydrous heating when absorbing solar energy.
The present invention has guaranteed that greatly liquid heating apparatus can not damage liquid heating apparatus because of cutting off the water or causing the liquid return dry combustion method during failure of pump; Guarantee when pump housing generation crackle, can not leak human body is damaged and befouling environment; Guaranteed effectively that by the last lower thrust-bearing that is provided with the impeller string quantity makes it be in the efficient that product has been guaranteed in normal working position; And the circulation loop medium makes thrust-bearing, porcelain shaft and ceramic bearing that enough lubricated rates that reduces wear mutually be arranged through the gap between stator can and the Rotor can, has reduced noise, has prolonged the working life of shielded electric-pump greatly.
More than show and described basic principle of the present invention and major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (4)
1. shielded electric-pump that safety check is installed, it is made up of with the shield electric machine that is connected with the pump housing the pump housing, it is characterized in that, also is provided with a safety check that prevents liquid return on this pump housing, and described safety check is arranged on pump housing outlet port.
2. a kind of shielded electric-pump that safety check is installed according to claim 1 is characterized in that described safety check is made up of safety check valve gap, liner, spring, spool and seal ring.
3. a kind of shielded electric-pump that safety check is installed according to claim 2 is characterized in that, the state of described spool and liner is compressed into row control by liquid water.
4. a kind of shielded electric-pump that safety check is installed according to claim 2 is characterized in that, the seal ring on the described safety check is fixed in pump housing outlet inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100556238A CN101988510A (en) | 2009-07-30 | 2009-07-30 | Canned motor pump with check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100556238A CN101988510A (en) | 2009-07-30 | 2009-07-30 | Canned motor pump with check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101988510A true CN101988510A (en) | 2011-03-23 |
Family
ID=43745226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100556238A Pending CN101988510A (en) | 2009-07-30 | 2009-07-30 | Canned motor pump with check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101988510A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966532A (en) * | 2012-11-29 | 2013-03-13 | 无锡市金城泵业制造有限公司 | Check valve assembly for rapid-connection submersible pipeline pump |
| CN104214109A (en) * | 2013-06-03 | 2014-12-17 | 浙江三花股份有限公司 | Circulating pump |
| CN110296067A (en) * | 2018-03-23 | 2019-10-01 | 佛山市顺德区美的饮水机制造有限公司 | The water pump of water purification system and water purification system with it |
-
2009
- 2009-07-30 CN CN2009100556238A patent/CN101988510A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966532A (en) * | 2012-11-29 | 2013-03-13 | 无锡市金城泵业制造有限公司 | Check valve assembly for rapid-connection submersible pipeline pump |
| CN102966532B (en) * | 2012-11-29 | 2015-04-29 | 无锡市金城泵业制造有限公司 | Check valve assembly for rapid-connection submersible pipeline pump |
| CN104214109A (en) * | 2013-06-03 | 2014-12-17 | 浙江三花股份有限公司 | Circulating pump |
| CN104214109B (en) * | 2013-06-03 | 2018-04-27 | 浙江三花制冷集团有限公司 | A kind of circulating pump |
| CN110296067A (en) * | 2018-03-23 | 2019-10-01 | 佛山市顺德区美的饮水机制造有限公司 | The water pump of water purification system and water purification system with it |
| CN110296067B (en) * | 2018-03-23 | 2024-06-21 | 佛山市顺德区美的饮水机制造有限公司 | Water pump of water purification system and water purification system with same |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110323 |