CN105386969A - Control circuit for two draining pumps - Google Patents
Control circuit for two draining pumps Download PDFInfo
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- CN105386969A CN105386969A CN201510930433.1A CN201510930433A CN105386969A CN 105386969 A CN105386969 A CN 105386969A CN 201510930433 A CN201510930433 A CN 201510930433A CN 105386969 A CN105386969 A CN 105386969A
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- Prior art keywords
- auxiliary reclay
- normally opened
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- opened contact
- normally
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a control circuit for two draining pumps. The control circuit comprises a first draining pump M1, a second draining pump M2, a low-liquid-level switch SLL, a high-liquid-level switch SLH, an ultrahigh-liquid-level switch SLHH, a time relay KT1, a time relay KT2, a thermal overload relay KH1, a thermal overload relay KH2, an alternating-current contactor KM1, an alternating current contactor KM2, an intermediate relay KA1, an intermediate relay KA2, an intermediate relay KA3, an intermediate relay KA4, an intermediate relay KA5, an intermediate relay KA6 and a change-over switch SA. According to the control circuit, effective and automatic cooperative control over the two draining pumps can be achieved according to the actual liquid level condition; meanwhile, the draining pumps are effectively protected through the thermal overload relays, and a thermal overload alarm function and an excessively high liquid level alarm function are achieved.
Description
Technical field
The invention belongs to draining pump control technique field, relate in particular to a kind of double-drainage pump control circuit.
Background technique
When carrying out draining, most important to the control of draining pump, especially to carry out effective Collaborative Control automatically according to the actual conditions of liquid level to multiple stage draining pump, also tackle draining pump simultaneously and carry out available protecting, and there is corresponding warning function.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of double-drainage pump control circuit is provided.
The present invention is achieved by the following technical solutions:
A kind of double-drainage pump control circuit comprises first row water pump M1, second row water pump M2, low liquid-level switch SLL, high level switch SLH, superelevation liquid-level switch SLHH, time relay KT1, time relay KT2, thermal overload relay KH1, thermal overload relay KH2, A.C. contactor KM1, A.C. contactor KM2, auxiliary reclay KA1, auxiliary reclay KA2, auxiliary reclay KA3, auxiliary reclay KA4, auxiliary reclay KA5, auxiliary reclay KA6, throw over switch SA;
After low liquid-level switch SLL, high level switch SLH connect successively with auxiliary reclay KA1, two ends are connected with live wire L, zero line N respectively, superelevation liquid-level switch SLHH and auxiliary reclay KA2 is connected in parallel on high level switch SLH and auxiliary reclay KA1 two ends after connecting, the normally opened contact KA1.1 of auxiliary reclay KA1 and the normally opened contact KA2.1 of auxiliary reclay KA2 is all in parallel with high level switch SLH, and the normally opened contact KA2.2 of auxiliary reclay KA2 is in parallel with superelevation liquid-level switch SLHH;
After the normally-closed contact KT2.1 of time relay KT2, the normally opened contact KT1.1 of time relay KT1 connect successively with auxiliary reclay KA3, two ends are connected with live wire L, zero line N respectively, and the normally opened contact KA3.1 of auxiliary reclay KA3 is in parallel with the normally opened contact KT1.1 of time relay KT1;
Reset button SR is connected with live wire L, zero line N respectively with two ends after auxiliary reclay KA4 parallel connection, and the normally opened contact KA4.1 of auxiliary reclay KA4 is in parallel with reset button SR;
After the normally opened contact KA5.1 of auxiliary reclay KA5, the normally-closed contact KA4.2 of auxiliary reclay KA4 connect successively with warning light PB1, two ends are connected with live wire L, zero line N respectively, and the normally opened contact KA2.3 of the normally opened contact KA6.1 of auxiliary reclay KA6 and auxiliary reclay KA2 and the normally opened contact KA5.1 of auxiliary reclay KA5 is in parallel;
First contact of throw over switch SA is connected with live wire L through the normally opened contact KA1.2 of auxiliary reclay KA1;
Second contact of throw over switch SA is connected with zero line N through the normally-closed contact KM2.2 of the normally opened contact KT1.2 of time relay KT1, A.C. contactor KM2, time relay KT1 successively, and the normally-closed contact KA3.2 of auxiliary reclay KA3 is in parallel with the normally opened contact KT1.2 of time relay KT1, the normally opened contact KA2.4 of auxiliary reclay KA2 is connected in parallel on normally opened contact KT1.2 and normally-closed contact KM2.2 two ends;
3rd contact of throw over switch SA is connected with live wire L;
4th contact of throw over switch SA is connected with zero line N through the normally-closed contact KH1.2 of normally closed button SS1, button SB1, A.C. contactor KM1, thermal overload relay KH1 successively, and the normally opened contact KM1.1 of A.C. contactor KM1 is connected in parallel on button SB1 and A.C. contactor KM1 two ends after connecting with red led HR1, and time relay KT1 is connected in parallel on the normally-closed contact KH1.2 two ends of A.C. contactor KM1 and thermal overload relay KH1;
5th contact of throw over switch SA is connected with live wire L through the normally opened contact KA1.3 of auxiliary reclay KA1;
6th contact of throw over switch SA is connected with zero line N through the normally-closed contact KM1.2 of the normally opened contact KT2.2 of time relay KT2, A.C. contactor KM1, time relay KT2 successively, and the normally opened contact KA3.3 of auxiliary reclay KA3 is in parallel with the normally opened contact KT2.2 of time relay KT2, the normally opened contact KA2.5 of auxiliary reclay KA2 is connected in parallel on normally opened contact KT2.2 and normally-closed contact KM1.2 two ends;
7th contact of throw over switch SA is connected with live wire L;
8th contact of throw over switch SA is connected with zero line N through the normally-closed contact KH2.2 of normally closed button SS2, button SB2, A.C. contactor KM2, thermal overload relay KH2 successively, and the normally opened contact KM2.1 of A.C. contactor KM2 is connected in parallel on button SB2 and A.C. contactor KM2 two ends after connecting with red led HR2, and time relay KT2 is connected in parallel on the normally-closed contact KH2.2 two ends of A.C. contactor KM2 and thermal overload relay KH2;
After normally opened contact KH1.1 and the yellow indicator lamp HY1 of thermal overload relay KH1 connect, two ends are connected with live wire L, zero line N respectively, and auxiliary reclay KA5 is in parallel with yellow indicator lamp HY1; After normally opened contact KH2.1 and the yellow indicator lamp HY2 of thermal overload relay KH2 connect, two ends are connected with live wire L, zero line N respectively, and auxiliary reclay KA6 is in parallel with yellow indicator lamp HY2.
First row water pump M1 is connected with double-power source through thermal overload relay KH1, the normally opened contact KM1.3 of A.C. contactor KM1, circuit breaker Q F1; Second row water pump M2 is connected with double-power source through thermal overload relay KH2, the normally opened contact KM2.3 of A.C. contactor KM2, circuit breaker Q F2.
Advantage of the present invention and beneficial effect are:
Double-drainage pump control circuit of the present invention can carry out effective Collaborative Control automatically according to the actual conditions of liquid level to two draining pumps; by thermal overload relay, available protecting is carried out to draining pump simultaneously, and there is thermal overload and the too high warning function of liquid level.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Fig. 2 is circuit diagram of the present invention.
Embodiment
Technological scheme of the present invention is further illustrated below in conjunction with specific embodiment.
As shown in Figure 1-2, double-drainage pump control circuit involved in the present invention comprises first row water pump M1, second row water pump M2, low liquid-level switch SLL, high level switch SLH, superelevation liquid-level switch SLHH, time relay KT1, time relay KT2, thermal overload relay KH1, thermal overload relay KH2, A.C. contactor KM1, A.C. contactor KM2, auxiliary reclay KA1, auxiliary reclay KA2, auxiliary reclay KA3, auxiliary reclay KA4, auxiliary reclay KA5, auxiliary reclay KA6, throw over switch SA
After low liquid-level switch SLL, high level switch SLH connect successively with auxiliary reclay KA1, two ends are connected with live wire L, zero line N respectively, superelevation liquid-level switch SLHH and auxiliary reclay KA2 is connected in parallel on high level switch SLH and auxiliary reclay KA1 two ends after connecting, the normally opened contact KA1.1 of auxiliary reclay KA1 and the normally opened contact KA2.1 of auxiliary reclay KA2 is all in parallel with high level switch SLH, and the normally opened contact KA2.2 of auxiliary reclay KA2 is in parallel with superelevation liquid-level switch SLHH;
After the normally-closed contact KT2.1 of time relay KT2, the normally opened contact KT1.1 of time relay KT1 connect successively with auxiliary reclay KA3, two ends are connected with live wire L, zero line N respectively, and the normally opened contact KA3.1 of auxiliary reclay KA3 is in parallel with the normally opened contact KT1.1 of time relay KT1;
Reset button SR is connected with live wire L, zero line N respectively with two ends after auxiliary reclay KA4 parallel connection, and the normally opened contact KA4.1 of auxiliary reclay KA4 is in parallel with reset button SR;
After the normally opened contact KA5.1 of auxiliary reclay KA5, the normally-closed contact KA4.2 of auxiliary reclay KA4 connect successively with warning light PB1, two ends are connected with live wire L, zero line N respectively, and the normally opened contact KA2.3 of the normally opened contact KA6.1 of auxiliary reclay KA6 and auxiliary reclay KA2 and the normally opened contact KA5.1 of auxiliary reclay KA5 is in parallel;
Throw over switch SA comprises 8 contacts, by throw over switch SA realize to draining pump manually and automatically control switch, when 3., 4. contacting of throw over switch SA, and 7., when 8. contacting, be Non-follow control state; When 1., 2. contacting of throw over switch SA, and 5., when 6. contacting, be automatic control state;
1. the contact of throw over switch SA is connected with live wire L through the normally opened contact KA1.2 of auxiliary reclay KA1;
2. the contact of throw over switch SA is connected with zero line N through the normally-closed contact KM2.2 of the normally opened contact KT1.2 of time relay KT1, A.C. contactor KM2, time relay KT1 successively, and the normally-closed contact KA3.2 of auxiliary reclay KA3 is in parallel with the normally opened contact KT1.2 of time relay KT1, the normally opened contact KA2.4 of auxiliary reclay KA2 is connected in parallel on KT1.2 and KM2.2 two ends;
3. the contact of throw over switch SA is connected with live wire L;
4. the contact of throw over switch SA is connected with zero line N through the normally-closed contact KH1.2 of normally closed button SS1, button SB1, A.C. contactor KM1, thermal overload relay KH1 successively, and the normally opened contact KM1.1 of A.C. contactor KM1 is connected in parallel on button SB1 and A.C. contactor KM1 two ends after connecting with red led HR1, and time relay KT1 is connected in parallel on the normally-closed contact KH1.2 two ends of A.C. contactor KM1 and thermal overload relay KH1;
5. the contact of throw over switch SA is connected with live wire L through the normally opened contact KA1.3 of auxiliary reclay KA1;
6. the contact of throw over switch SA is connected with zero line N through the normally-closed contact KM1.2 of the normally opened contact KT2.2 of time relay KT2, A.C. contactor KM1, time relay KT2 successively, and the normally opened contact KA3.3 of auxiliary reclay KA3 is in parallel with the normally opened contact KT2.2 of time relay KT2, the normally opened contact KA2.5 of auxiliary reclay KA2 is connected in parallel on KT2.2 and KM1.2 two ends;
7. the contact of throw over switch SA is connected with live wire L;
8. the contact of throw over switch SA is connected with zero line N through the normally-closed contact KH2.2 of normally closed button SS2, button SB2, A.C. contactor KM2, thermal overload relay KH2 successively, and the normally opened contact KM2.1 of A.C. contactor KM2 is connected in parallel on button SB2 and A.C. contactor KM2 two ends after connecting with red led HR2, and time relay KT2 is connected in parallel on the normally-closed contact KH2.2 two ends of A.C. contactor KM2 and thermal overload relay KH2;
After normally opened contact KH1.1 and the yellow indicator lamp HY1 of thermal overload relay KH1 connect, two ends are connected with live wire L, zero line N respectively, and auxiliary reclay KA5 is in parallel with yellow indicator lamp HY1; After normally opened contact KH2.1 and the yellow indicator lamp HY2 of thermal overload relay KH2 connect, two ends are connected with live wire L, zero line N respectively, and auxiliary reclay KA6 is in parallel with yellow indicator lamp HY2.
As shown in Figure 2, first row water pump M1 is electrically connected with double-power source ATS through normally opened contact KM1.3, the circuit breaker Q F1 of thermal overload relay KH1, A.C. contactor KM1; Second row water pump M2 is electrically connected with double-power source ATS through normally opened contact KM2.3, the circuit breaker Q F2 of thermal overload relay KH2, A.C. contactor KM2.
The method of operation of double-drainage pump control circuit of the present invention is as follows:
(the 3. contact of throw over switch SA and 4. contact during Non-follow control, 7. contact and 8. contact), press the button SB1, A.C. contactor KM1 coil obtains electric, the normally opened contact KM1.1 of A.C. contactor KM1 closes, yellow indicator lamp HY1 is bright, and the normally opened contact KM1.3 of A.C. contactor KM1 closes, and first row water pump M1 operates; Press the button SB2, A.C. contactor KM2 coil obtains electric, and the normally opened contact KM2.1 of A.C. contactor KM2 closes, and yellow indicator lamp HY2 is bright, and the normally opened contact KM2.3 of A.C. contactor KM2 closes, and second row water pump M2 operates.
During automatic control (the 1. contact of throw over switch SA and 2. contact, 5. contact and 6. contact):
One, when high level switch SLH closes (being now high water level), the coil of auxiliary reclay KA obtains electric, normally opened contact KA1.2 and KA1.3 of auxiliary reclay KA closes, first electric current flows through 1. contact, 2. contact, KA3.2, KM2.2, KM1, KH1.2, A.C. contactor KM1 coil is made to obtain electric, A.C. contactor KM1 normally opened contact KM1.3 Closed control first row water pump M1 operates, and time relay KT1 starts timing simultaneously, time relay KT1 action (setting the timing of time relay KT1 in advance) after first row water pump M1 running certain hour, the normally opened contact KT1.1 of time relay KT1 closes, the coil of auxiliary reclay KA3 is obtained electric (forming self-locking by KA3.1), KA3.3 closes, electric current flows through 5. contact, 6. contact, KA3.3, KM1.2, KM2, KH2.2, A.C. contactor KM2 coil is made to obtain electric, A.C. contactor KM2 normally opened contact KM2.3 Closed control second row water pump M2 operates, A.C. contactor KM2 normally-closed contact KM2.2 disconnects and makes KM1 coil losing electricity simultaneously, thus KM1.3 disconnection control first row water pump M1 shuts down, time relay KT2 starts timing simultaneously, time relay KT2 action (setting the timing of time relay KT2 in advance) after second row water pump M2 running certain hour, the normally-closed contact KT2.1 of time relay KT2 disconnects, make the coil losing electricity of auxiliary reclay KA3, thus make normally-closed contact KA3.2 recover closed, electric current is made to flow through 1. contact, 2. contact, KA3.2, KM2.2, KM1, KH1.2, A.C. contactor KM1 coil is made to obtain electric, A.C. contactor KM1 normally opened contact KM1.3 Closed control first row water pump M1 operates, KM1.2 disconnects control second row water pump M2 and shuts down, time relay KT1 starts timing simultaneously, repeat above step afterwards, make two draining pump alternate-runnings, prevent because draining pump continuous running causes potential safety hazard.
Two, when superelevation liquid-level switch SLHH closes (being now surcharge water level), the coil of auxiliary reclay KA2 obtains electric, now KA2.4 and KA2.5 closes, make the coil of A.C. contactor KM1, KM2 simultaneously electric, KM1.3 and KM2.3 closes simultaneously, to control first row water pump M1 and second row water pump M2 operates simultaneously, carry out drainage works.
The present invention also has temperature alarm function, and when the thermal overload relay KH1 action of first row water pump M1, KH1.1 closes, and yellow indicator lamp HY1 lights, and auxiliary reclay KA5 coil obtains electric simultaneously, and KA5.1 closes, and warning light PB1 is given the alarm; When the thermal overload relay KH2 action of second row water pump M2, KH2.1 closes, and yellow indicator lamp HY2 lights, and auxiliary reclay KA6 coil obtains electric simultaneously, and KA6.1 closes, and warning light PB1 is given the alarm; In addition, when superelevation liquid-level switch SLHH closes (being now surcharge water level), KA2.3 closes, and warning light PB1 gives the alarm and points out liquid level too high.Resetted to warning light PB1 by reset button SR, when reset button SR presses, auxiliary reclay KA4 obtains electric, and KA4.2 disconnects, and warning light PB1 is closed.
Above to invention has been exemplary description; should be noted that; when not departing from core of the present invention, any simple distortion, amendment or other those skilled in the art can not spend the equivalent replacement of creative work all to fall into protection scope of the present invention.
Claims (1)
1. a double-drainage pump control circuit, is characterized in that: comprise first row water pump M1, second row water pump M2, low liquid-level switch SLL, high level switch SLH, superelevation liquid-level switch SLHH, time relay KT1, time relay KT2, thermal overload relay KH1, thermal overload relay KH2, A.C. contactor KM1, A.C. contactor KM2, auxiliary reclay KA1, auxiliary reclay KA2, auxiliary reclay KA3, auxiliary reclay KA4, auxiliary reclay KA5, auxiliary reclay KA6, throw over switch SA;
After low liquid-level switch SLL, high level switch SLH connect successively with auxiliary reclay KA1, two ends are connected with live wire L, zero line N respectively, superelevation liquid-level switch SLHH and auxiliary reclay KA2 is connected in parallel on high level switch SLH and auxiliary reclay KA1 two ends after connecting, the normally opened contact KA1.1 of auxiliary reclay KA1 and the normally opened contact KA2.1 of auxiliary reclay KA2 is all in parallel with high level switch SLH, and the normally opened contact KA2.2 of auxiliary reclay KA2 is in parallel with superelevation liquid-level switch SLHH;
After the normally-closed contact KT2.1 of time relay KT2, the normally opened contact KT1.1 of time relay KT1 connect successively with auxiliary reclay KA3, two ends are connected with live wire L, zero line N respectively, and the normally opened contact KA3.1 of auxiliary reclay KA3 is in parallel with the normally opened contact KT1.1 of time relay KT1;
Reset button SR is connected with live wire L, zero line N respectively with two ends after auxiliary reclay KA4 parallel connection, and the normally opened contact KA4.1 of auxiliary reclay KA4 is in parallel with reset button SR;
After the normally opened contact KA5.1 of auxiliary reclay KA5, the normally-closed contact KA4.2 of auxiliary reclay KA4 connect successively with warning light PB1, two ends are connected with live wire L, zero line N respectively, and the normally opened contact KA2.3 of the normally opened contact KA6.1 of auxiliary reclay KA6 and auxiliary reclay KA2 and the normally opened contact KA5.1 of auxiliary reclay KA5 is in parallel;
First contact of throw over switch SA is connected with live wire L through the normally opened contact KA1.2 of auxiliary reclay KA1;
Second contact of throw over switch SA is connected with zero line N through the normally-closed contact KM2.2 of the normally opened contact KT1.2 of time relay KT1, A.C. contactor KM2, time relay KT1 successively, and the normally-closed contact KA3.2 of auxiliary reclay KA3 is in parallel with the normally opened contact KT1.2 of time relay KT1, the normally opened contact KA2.4 of auxiliary reclay KA2 is connected in parallel on normally opened contact KT1.2 and normally-closed contact KM2.2 two ends;
3rd contact of throw over switch SA is connected with live wire L;
4th contact of throw over switch SA is connected with zero line N through the normally-closed contact KH1.2 of normally closed button SS1, button SB1, A.C. contactor KM1, thermal overload relay KH1 successively, and the normally opened contact KM1.1 of A.C. contactor KM1 is connected in parallel on button SB1 and A.C. contactor KM1 two ends after connecting with red led HR1, and time relay KT1 is connected in parallel on the normally-closed contact KH1.2 two ends of A.C. contactor KM1 and thermal overload relay KH1;
5th contact of throw over switch SA is connected with live wire L through the normally opened contact KA1.3 of auxiliary reclay KA1;
6th contact of throw over switch SA is connected with zero line N through the normally-closed contact KM1.2 of the normally opened contact KT2.2 of time relay KT2, A.C. contactor KM1, time relay KT2 successively, and the normally opened contact KA3.3 of auxiliary reclay KA3 is in parallel with the normally opened contact KT2.2 of time relay KT2, the normally opened contact KA2.5 of auxiliary reclay KA2 is connected in parallel on normally opened contact KT2.2 and normally-closed contact KM1.2 two ends;
7th contact of throw over switch SA is connected with live wire L;
8th contact of throw over switch SA is connected with zero line N through the normally-closed contact KH2.2 of normally closed button SS2, button SB2, A.C. contactor KM2, thermal overload relay KH2 successively, and the normally opened contact KM2.1 of A.C. contactor KM2 is connected in parallel on button SB2 and A.C. contactor KM2 two ends after connecting with red led HR2, and time relay KT2 is connected in parallel on the normally-closed contact KH2.2 two ends of A.C. contactor KM2 and thermal overload relay KH2;
After normally opened contact KH1.1 and the yellow indicator lamp HY1 of thermal overload relay KH1 connect, two ends are connected with live wire L, zero line N respectively, and auxiliary reclay KA5 is in parallel with yellow indicator lamp HY1; After normally opened contact KH2.1 and the yellow indicator lamp HY2 of thermal overload relay KH2 connect, two ends are connected with live wire L, zero line N respectively, and auxiliary reclay KA6 is in parallel with yellow indicator lamp HY2;
First row water pump M1 is connected with double-power source through thermal overload relay KH1, the normally opened contact KM1.3 of A.C. contactor KM1, circuit breaker Q F1; Second row water pump M2 is connected with double-power source through thermal overload relay KH2, the normally opened contact KM2.3 of A.C. contactor KM2, circuit breaker Q F2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510930433.1A CN105386969A (en) | 2015-12-11 | 2015-12-11 | Control circuit for two draining pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510930433.1A CN105386969A (en) | 2015-12-11 | 2015-12-11 | Control circuit for two draining pumps |
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| CN105386969A true CN105386969A (en) | 2016-03-09 |
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| CN201510930433.1A Pending CN105386969A (en) | 2015-12-11 | 2015-12-11 | Control circuit for two draining pumps |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108227599A (en) * | 2016-12-14 | 2018-06-29 | 上海连成（集团）有限公司 | Dredge pump water pump intelligent control system |
| CN108708846A (en) * | 2018-04-08 | 2018-10-26 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of cold drainage system of extra-high-voltage direct-current power transmission converter valve |
| CN108799086A (en) * | 2018-07-27 | 2018-11-13 | 武汉长兴电器发展有限公司 | A kind of water pump automatic inspection device and system |
| CN110159519A (en) * | 2019-06-27 | 2019-08-23 | 泰豪科技股份有限公司 | A kind of immersible pump the using and the reserved control system and method |
| CN113374034A (en) * | 2021-06-07 | 2021-09-10 | 上海庸嘉水务科技(集团)有限公司 | Controller based on floating ball control water pump opens and stops |
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| CN204610224U (en) * | 2015-05-21 | 2015-09-02 | 哈尔滨理工大学 | For the switching control of two water pumps of building secondary water-supply |
| CN205225641U (en) * | 2015-12-11 | 2016-05-11 | 天津市威匡电气设备有限公司 | Double pump control circuit |
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| CN108227599B (en) * | 2016-12-14 | 2024-05-14 | 上海连成（集团）有限公司 | Intelligent control system for sewage pump |
| CN108708846A (en) * | 2018-04-08 | 2018-10-26 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of cold drainage system of extra-high-voltage direct-current power transmission converter valve |
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Application publication date: 20160309 |