CN204692011U - A kind of control system reducing water pump recirculation and leak - Google Patents
A kind of control system reducing water pump recirculation and leak Download PDFInfo
- Publication number
- CN204692011U CN204692011U CN201520317037.7U CN201520317037U CN204692011U CN 204692011 U CN204692011 U CN 204692011U CN 201520317037 U CN201520317037 U CN 201520317037U CN 204692011 U CN204692011 U CN 204692011U
- Authority
- CN
- China
- Prior art keywords
- valve
- recirculation
- modulating valve
- water pump
- water tank
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 230000008676 import Effects 0.000 claims abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 5
- 230000003134 recirculating effect Effects 0.000 abstract description 4
- 230000008439 repair process Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model discloses a kind of control system reducing water pump recirculation and leak, comprise water tank, and be arranged at the circulation loop in water tank import and export; Circulation loop is provided with water pump, and water delivery side of pump is divided into two-way, and a road is connected with user, and modulating valve of separately leading up to is connected to the ingress of water tank, and the ingress of modulating valve is provided with electric isolating valve.The utility model, not needing the operating conditions opening recirculation, realizes the function of recirculating system twice valve seal.Because recirculation modulating valve is more many than electric isolating valve price, first electric isolating valve is washed away before being positioned at recirculation modulating valve, also protects the sealing surface of recirculation modulating valve, improves the running environment of recirculation modulating valve.With maintenance or changes compared with modulating valve, the utility model reduces the probability that recirculation is leaked greatly, also minimizing repair and maintenance cost.
Description
Technical field
The utility model belongs to industrial processes technical field, relates to a kind of control system reducing water pump recirculation and leak.
Background technique
During many industrial water pumps run, some operating mode is in order to meet water pump minimum discharge protection needs; a part in working medium after exit of pump is pressurizeed; return to the water tank of pump intake, to ensure to be greater than minimum discharge restriction by the flow of water pump by the mode of opening recirculation.
Some operating mode feedwater flow is enough large, does not just need to open recirculation, but due to opening and closing that take place frequently of recirculation modulating valve in running in the past, the abrasion deformation of modulating valve sealing surface is relatively more serious, causes not needing to there is it when opening recirculation and leaks seriously.For the feed water pump of fired power generating unit, water is boosted to 20MPa from 1MPa even higher, recirculation modulating valve is poorly sealed, and certainly there is certain leakage quantity and to anhydrate case (oxygen-eliminating device), energy loss is huge.
The method reducing water pump recirculation leakage at present in industrial production system (particularly power plant operation) is substantially all carry out maintenance grinding to adjustment valve sealing surface or change new valve, puts into operation and occur leakage problem again very soon after process.
Model utility content
The purpose of this utility model is to solve above-mentioned the problems of the prior art, a kind of control system reducing water pump recirculation and leak is provided, this system changes hand operated door isolating door (often opening) before modulating valve into electric isolating valve, by change controlling method and modulating valve with the use of, reduce leakage waste when adjustment doors closed condition is run, and reduce equipment repair and maintenance cost.
To achieve these goals, the utility model is achieved by the following technical solutions:
Reduce the control system that water pump recirculation is leaked, comprise water tank, and be arranged at the circulation loop in water tank import and export; Circulation loop is provided with water pump, and water delivery side of pump is divided into two-way, and a road is connected with user, and modulating valve of separately leading up to is connected to the ingress of water tank, and the ingress of modulating valve is provided with electric isolating valve.
Further, the outlet port connection traffic meter of water pump, the signal output part of flowmeter is connected in the control logic of electric isolating valve.
Further, manual isolating door is also provided with between modulating valve and water tank.
Further, when circulation loop needs to open, electric isolating valve is at the front opening of modulating valve; When circulation loop needs to close, electric isolating valve is closed after modulating valve.
Compared with prior art, the utility model has following beneficial effect:
The utility model, not needing the operating conditions opening recirculation, realizes the function of recirculating system twice valve seal.Because recirculation modulating valve is more many than electric isolating valve price, first electric isolating valve is washed away before being positioned at recirculation modulating valve, also protects the sealing surface of recirculation modulating valve, improves the running environment of recirculation modulating valve.With maintenance or changes compared with modulating valve, the utility model reduces the probability that recirculation is leaked greatly, also minimizing repair and maintenance cost.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in more detail:
See figure, the utility model comprises water tank, and is arranged at the circulation loop in water tank import and export; Circulation loop is provided with water pump 1, the outlet of water pump 1 is divided into two-way, and a road is connected with user, and modulating valve 2 of separately leading up to is connected to the ingress of water tank, and the ingress of modulating valve 2 is provided with electric isolating valve 3.The outlet port connection traffic meter 4 of water pump 1, the signal output part of flowmeter 4 is connected in the control logic of electric isolating valve 3.Manual isolating door is also provided with between modulating valve 2 and water tank.When circulation loop needs to open, electric isolating valve 3 is at the front opening of modulating valve 2; When circulation loop needs to close, electric isolating valve 3 is closed after modulating valve 2.
Principle of the present utility model
The utility model changes hand operated door isolating door (often opening) before modulating valve in recirculating line into electric isolating valve, realizes by changing new valve or increasing electric actuator; Electric isolating valve control logic is associated with flowmeter flux signal; When normal users need the water yield less to a certain extent, and in the process reduced gradually, realize recirculation modulating valve when will open, electric isolating valve is opened prior to modulating valve, namely when feedwater flow is less than certain certain value, electric isolating valve is opened, and certain certain value is that 1 of minimum discharge adds that a numerical value or minimum discharge are multiplied by the coefficient that is greater than 1, and this numerical value is determined according to actual conditions.The water yield needed when normal users is less than minimum discharge, and is increasing gradually in the process more than minimum discharge, realizes recirculation modulating valve when will close, closes after electric isolating valve in modulating valve.Namely, when feedwater flow is greater than certain certain value, electric isolating valve is opened, and certain certain value is that 1 of minimum discharge adds that a numerical value or minimum discharge are multiplied by the coefficient that is greater than 1, and this numerical value is determined according to actual conditions.Do not need at majority the operating conditions opening recirculation, realized the function of recirculating system twice valve seal by above controlling method, in reducing, leak probability.And before electric isolating valve is positioned at recirculation modulating valve, first washed away, also protect the sealing surface of recirculation modulating valve, improve the running environment of recirculation modulating valve.
The utility model can reduce leakage and feed water pump is done work less, and for the feed water pump of fired power generating unit, water is boosted to 20MPa from 1MPa even higher, if recirculation modulating valve exists the leakage quantity of 20t/h, then water supply pump motor many power consumption power budget is as follows:
In formula: P is power of motor, unit W or kW; G is gravity accleration, unit
q is mass flow rate, unit
h is lift, and it is that 1MPa=100m water is noted that unit m and conversion pressure close; η
ppump efficiency, value 0.85; η
felectric efficiency, value 0.95.
Above content is only and technological thought of the present utility model is described; protection domain of the present utility model can not be limited with this; every technological thought according to the utility model proposes, any change that technological scheme basis is done, within the protection domain all falling into the utility model claims.
Claims (4)
1. reduce the control system that water pump recirculation is leaked, it is characterized in that: comprise water tank, and be arranged at the circulation loop in water tank import and export; Circulation loop is provided with water pump (1), the outlet of water pump (1) is divided into two-way, one tunnel is connected with user, modulating valve (2) of separately leading up to is connected to the ingress of water tank, and the ingress of modulating valve (2) is provided with electric isolating valve (3).
2. the control system of minimizing water pump recirculation leakage according to claim 1, it is characterized in that: outlet port connection traffic meter (4) of described water pump (1), the signal output part of flowmeter (4) is connected in the control logic of electric isolating valve (3).
3. the control system of minimizing water pump recirculation leakage according to claim 1 and 2, is characterized in that: be also provided with manual isolating door between described modulating valve (2) and water tank.
4. the control system of minimizing water pump recirculation leakage according to claim 2, is characterized in that: when circulation loop needs to open, electric isolating valve (3) front opening in modulating valve (2); When circulation loop needs to close, electric isolating valve (3) is closed after modulating valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520317037.7U CN204692011U (en) | 2015-05-15 | 2015-05-15 | A kind of control system reducing water pump recirculation and leak |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520317037.7U CN204692011U (en) | 2015-05-15 | 2015-05-15 | A kind of control system reducing water pump recirculation and leak |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204692011U true CN204692011U (en) | 2015-10-07 |
Family
ID=54232312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520317037.7U Expired - Fee Related CN204692011U (en) | 2015-05-15 | 2015-05-15 | A kind of control system reducing water pump recirculation and leak |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204692011U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307380A (en) * | 2019-07-16 | 2019-10-08 | 艾思瑞流体控制有限公司 | A method of extending regulating valve service life in water supply recycling |
| CN113431787A (en) * | 2021-07-30 | 2021-09-24 | 西安热工研究院有限公司 | System for preventing recirculation valve of feed pump from leaking under condition of adapting to frequent peak regulation situation |
-
2015
- 2015-05-15 CN CN201520317037.7U patent/CN204692011U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307380A (en) * | 2019-07-16 | 2019-10-08 | 艾思瑞流体控制有限公司 | A method of extending regulating valve service life in water supply recycling |
| CN113431787A (en) * | 2021-07-30 | 2021-09-24 | 西安热工研究院有限公司 | System for preventing recirculation valve of feed pump from leaking under condition of adapting to frequent peak regulation situation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20180515 |