CN101206154A - Method for detecting leakage of seal cavity of oil immersion type electric underwater pump - Google Patents
Method for detecting leakage of seal cavity of oil immersion type electric underwater pump Download PDFInfo
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- CN101206154A CN101206154A CNA2007101647466A CN200710164746A CN101206154A CN 101206154 A CN101206154 A CN 101206154A CN A2007101647466 A CNA2007101647466 A CN A2007101647466A CN 200710164746 A CN200710164746 A CN 200710164746A CN 101206154 A CN101206154 A CN 101206154A
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- seal cavity
- oil
- voltage
- submersible pump
- annular seal
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- 238000000034 method Methods 0.000 title claims description 10
- 238000007654 immersion Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000523 sample Substances 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009189 diving Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a leak detection method for oil immersed type submersible pump seal cavity. Two probes of an oil water sensor are inserted into the seal cavity of a miniature oil immersed type submersible pump, the voltage across the two ends of wires leading out of the two probes is measured, and judgment on the leakage of the seal cavity is based on measurement of variable oil resistance in the seal cavity. According to the relationship between the voltage and the water content in the oil, when the voltage across two poles is measured less than 24V, the seal cavity of the submersible pump has water incoming to a certain extent; when the water content in the oil reaches 50 percent and the voltage across two poles reaches 3V, the seal cavity of the submersible pump is judged to have a serious problem of water incoming and has to be replaced, thereby not only avoiding economic loss of farmers caused by replacement of the seal cavity once the seal cavity has slight water incoming, but also avoiding economic loss and casualty caused by burning of the submersible pump due to water entering a motor cavity.
Description
Technical field
The present invention relates to a kind of method for detecting leakage of seal cavity of submersible pump.
Background technology
Occasion such as submersible pump is mainly used in to draw water in the down-hole, farmland discharging-irrigating, gardens water.According to incompletely statistics, China's submersible pump year output has reached 5,000,000, and its repair rate is up to 8%, according to investigation to the technology after-sale service department of relevant submersible pump manufacturing enterprise, submersible pump lost efficacy usually in the leakage of annular seal space, thereby cause bearing failure or cause the motor cavity water inlet to burn motor, caused, even casualties than the large economy loss.
Application number is 02234941.3 and is called " oil-immersed diving pump water inlet pick-up unit " utility model patent, proposed a kind of oil-immersed diving pump water inlet pick-up unit, when intaking in the pump, signal promptly takes place in the alarm of this device, the water inlet of signal water pump, the prompting people in time change seal box.This device is complicated, and annular seal space one water inlet is that alarm is changed seal box, has caused some unnecessary economic losses of people.
Experience by investigation and user, when water cut reached 60% left and right sides in the submersible pump annular seal space, the submersible pump annular seal space lost efficacy generally speaking, and mechanical seal can not be worked, change annular seal space and neither can cause and burn the casualties that motor causes this moment, can save user's cost again.Therefore be necessary to provide a kind of method for detecting leakage of seal cavity of saving cost and simple and feasible small-sized oil immersion type electric underwater pump.
Summary of the invention
Purpose of the present invention provides a kind of small-sized method for detecting leakage of seal cavity of oil immersion type electric underwater pump, to judge the resistance detection method whether annular seal space leaks by fluid changes in resistance in the detection annular seal space, this method can not only help people to save cost, can also avoid the economic loss and the casualties that cause because of the submersible pump seal failure.
In order to achieve the above object, the technical solution used in the present invention is as follows:
Two probes of profit sensor are inserted in the small-sized seal cavity of oil immersion type electric underwater pump, detect the voltage at the lead two ends that two probes draw, judge the resistance whether annular seal space leaks by fluid changes in resistance in the detection annular seal space, according to voltage and Water in oil magnitude relation, when detecting two pole tensions, show existing water inlet in various degree in the submersible pump annular seal space, when two pole tensions reach 3V less than 24V, judgement submersible pump annular seal space is seriously intake, and changes annular seal space.
Described two probe diameter are that two stainless steel bars of 1 millimeter are made, and two stainless rod iron centre distance are greater than 1 millimeter.
The beneficial effect that the present invention has is:
The invention provides the resistance-type detection method that a kind of low cost and simple and feasible detection annular seal space leak, promptly know general water cut in the oil by the voltage that detects profit sensor extension line two ends, when the Water in oil amount reaches 50%, promptly change annular seal space, can avoid annular seal space one water inlet promptly to change annular seal space and cause the economic loss of peasant household like this, can avoid motor cavity water inlet back to cause again and burn economic loss and the casualties that causes, this method is simple, and is easy to use.
Description of drawings
Fig. 1 is that electric-resistivity method is surveyed the Water in oil schematic diagram.
Fig. 2 is a profit sensor construction synoptic diagram.
Fig. 3 is the cut-open view of Fig. 1.
Fig. 4 is profit sensor scheme of installation in annular seal space.
1. is the insulative cylinders body among the figure, 2. is mechanical seal, 3. is motor cavity, 4. is annular seal space, 5. is the profit sensor.
Embodiment
As shown in Figure 1, because oil is to be mixed by multiple hydrocarbon, its conductance is extremely low, can think megohmite insulant substantially, and water is the good conductor of electricity, and it is very big that both conductive capabilities differ.When with pure oil during as conducting medium, the resistance between two electrodes can be thought infinity, thereby, the electrode both end voltage can think equal substantially supply voltage deduct protective resistance R divide voltage.Through the actual measurement, add 24V voltage between the two poles of the earth, under the pure oil environment between the two poles of the earth voltage be 24V, under the pure water environment between the two poles of the earth voltage be 1V.
As Fig. 2, shown in Figure 3, the profit sensor is that two probes are to be that 1 millimeter stainless steel wire is made with diameter, and two stainless steel wires connect a lead separately, to transmit the voltage between the two poles of the earth.Two stainless rod iron centre distance prevent that greater than 1 millimeter two probes from contacting at work.Cause short circuit for avoiding two probes to contact in the course of the work, probe is filled in the insulative cylinders body 1 that has two through holes.
As shown in Figure 4, profit sensor 5 is installed in the oiling screw of submersible pump annular seal space 4, detects the resistance variations of fluid in the annular seal space.According to table 1, the detection voltage that contrast obtains when the Water in oil amount reaches 50%, is changed the annular seal space 4 of submersible pump at last.Wherein among the figure 2. for mechanical seal, 3. be motor cavity.
Table 1 voltage and Water in oil magnitude relation
| Water cut (%) | 5％ | 10％ | 15％ | 20％ | 25％ | 30％ | 35％ | 40％ | 45％ | 50％ |
| Voltage (V) | 14.2 | 12.1 | 9.8 | 6.4 | 5.3 | 4.5 | 4.1 | 3.2 | 3.1 | 3.0 |
Claims (2)
1. method for detecting leakage of seal cavity of oil immersion type electric underwater pump, it is characterized in that: two probes of profit sensor are inserted in the seal cavity of oil immersion type electric underwater pump, detect the voltage at the lead two ends that two probes draw, judge the resistance whether annular seal space leaks by fluid changes in resistance in the detection annular seal space, according to voltage and Water in oil magnitude relation, when detecting two pole tensions less than 24V, show existing water inlet in various degree in the submersible pump annular seal space, when two pole tensions reach 3V, judgement submersible pump annular seal space is seriously intake, and changes annular seal space.
2. method for detecting leakage of seal cavity of oil immersion type electric underwater pump according to claim 1 is characterized in that: described two probe diameter are that two stainless steel bars of 1 millimeter are made, and two stainless rod iron centre distance are greater than 1 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101647466A CN101206154A (en) | 2007-12-12 | 2007-12-12 | Method for detecting leakage of seal cavity of oil immersion type electric underwater pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101647466A CN101206154A (en) | 2007-12-12 | 2007-12-12 | Method for detecting leakage of seal cavity of oil immersion type electric underwater pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101206154A true CN101206154A (en) | 2008-06-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101647466A Pending CN101206154A (en) | 2007-12-12 | 2007-12-12 | Method for detecting leakage of seal cavity of oil immersion type electric underwater pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN101206154A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929912A (en) * | 2009-06-17 | 2010-12-29 | 维特科格雷控制有限公司 | Monitoring of undesirable fluid ingress into subsea control modules |
| CN103454048A (en) * | 2013-05-30 | 2013-12-18 | 明达实业(厦门)有限公司 | Water leakage detection mechanism |
| CN106441746A (en) * | 2016-09-06 | 2017-02-22 | 国网山东省电力公司潍坊供电公司 | Gas leakage speed detector specially used for GIS equipment |
| CN106593896A (en) * | 2016-12-14 | 2017-04-26 | 衡阳市力源动力制造有限公司 | Intelligent control submersible motor pump |
| CN106762710A (en) * | 2016-12-14 | 2017-05-31 | 衡阳市力源动力制造有限公司 | A kind of pump oil water probe of single control plastic bolt |
| CN113027744A (en) * | 2019-12-25 | 2021-06-25 | 中国石油天然气股份有限公司 | Water inflow detection method and device for plunger pump crankcase and plunger pump crankcase |
| CN113227581A (en) * | 2018-12-21 | 2021-08-06 | 格兰富控股联合股份公司 | Pump assembly and method of controlling a pump |
| US12025139B2 (en) | 2018-12-21 | 2024-07-02 | Grundfos Holding A/S | Pump assembly and method of controlling a pump |
-
2007
- 2007-12-12 CN CNA2007101647466A patent/CN101206154A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929912A (en) * | 2009-06-17 | 2010-12-29 | 维特科格雷控制有限公司 | Monitoring of undesirable fluid ingress into subsea control modules |
| US8711002B2 (en) | 2009-06-17 | 2014-04-29 | Vetco Gray Controls Limited | Monitoring of undesirable fluid ingress into subsea control modules |
| CN101929912B (en) * | 2009-06-17 | 2015-02-25 | 维特科格雷控制有限公司 | Monitoring of undesirable fluid ingress into subsea control modules |
| CN103454048A (en) * | 2013-05-30 | 2013-12-18 | 明达实业(厦门)有限公司 | Water leakage detection mechanism |
| CN103454048B (en) * | 2013-05-30 | 2016-05-11 | 明达实业(厦门)有限公司 | The testing agency of leaking |
| CN106441746A (en) * | 2016-09-06 | 2017-02-22 | 国网山东省电力公司潍坊供电公司 | Gas leakage speed detector specially used for GIS equipment |
| CN106593896A (en) * | 2016-12-14 | 2017-04-26 | 衡阳市力源动力制造有限公司 | Intelligent control submersible motor pump |
| CN106762710A (en) * | 2016-12-14 | 2017-05-31 | 衡阳市力源动力制造有限公司 | A kind of pump oil water probe of single control plastic bolt |
| CN106593896B (en) * | 2016-12-14 | 2022-09-30 | 湖南省大地泵业有限公司 | Intelligent control submersible electric pump |
| CN113227581A (en) * | 2018-12-21 | 2021-08-06 | 格兰富控股联合股份公司 | Pump assembly and method of controlling a pump |
| US12025139B2 (en) | 2018-12-21 | 2024-07-02 | Grundfos Holding A/S | Pump assembly and method of controlling a pump |
| CN113027744A (en) * | 2019-12-25 | 2021-06-25 | 中国石油天然气股份有限公司 | Water inflow detection method and device for plunger pump crankcase and plunger pump crankcase |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20080625 |