CN212778842U - Electric control system for interlocking liquid delivery pump and cooling tower fan - Google Patents
Electric control system for interlocking liquid delivery pump and cooling tower fan Download PDFInfo
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- CN212778842U CN212778842U CN202021187642.4U CN202021187642U CN212778842U CN 212778842 U CN212778842 U CN 212778842U CN 202021187642 U CN202021187642 U CN 202021187642U CN 212778842 U CN212778842 U CN 212778842U
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Abstract
The utility model belongs to the technical field of electric interlocking automatic control device, concretely relates to liquid delivery pump and interlocked electric control system of cooling tower fan, including the main circuit, including contactor KM 1's first normally open contact and fan, contactor KM 1's first normally open contact one end is connected to L1, L2, L3 three-phase alternating current power supply, and the other end is connected with the fan; and an automatic control circuit which comprises a change-over switch SA, a liquid level controller, a liquid level sensor, a first time relay KT1, a second time relay KT2 and a coil of a contactor KM 1. The utility model discloses can realize that the cooling tower fan is automatic to open and stop, possess convenient operation, save artifical, reduce energy resource consumption and improve operating personnel operational environment.
Description
Technical Field
The utility model belongs to the technical field of the chain automatic control device of electricity, concretely relates to liquid delivery pump and chain electrical control system of cooling tower fan.
Background
The start and stop of the liquid delivery pump used at present are centralized control and field control modes, the start and stop of the cooling tower fan are manually controlled, and an operator needs to go to a three-layer platform of the cooling tower fan to execute operation. The start and stop of the fan are not controlled in a centralized way, the operation is inconvenient, and operators need to go up and down stairs, so that the labor is wasted. If the pump is not started in time, the liquid cannot be cooled in time; if the pump is not closed timely, energy is wasted, and the production cost is increased; meanwhile, the operation of the fan cannot be stopped in time, so that the invalid loss of the equipment is caused, and the service life of the equipment is shortened; and the running sound of the fan is large, which causes noise pollution to operators.
Disclosure of Invention
Open the actual defect that the operation exists in order to overcome the cooling tower fan, the utility model aims at providing a liquid delivery pump and the chain electrical control system of cooling tower fan realize that the cooling tower fan is automatic to be opened and stop, possess convenient operation, save artifically, reduce energy consumption and improve operating personnel operational environment.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model discloses a liquid delivery pump and linked electrical control system of cooling tower fan, include:
the main circuit comprises a first normally open contact of a contactor KM1 and a fan, wherein one end of the first normally open contact of the contactor KM1 is connected to a three-phase alternating current power supply L1, L2 and L3, and the other end of the first normally open contact of the contactor KM1 is connected with the fan;
and an automatic control circuit, including a transfer switch SA, a liquid level controller, a liquid level sensor, a first time relay KT1, a second time relay KT2 and a coil of a contactor KM 1; one end of the change-over switch SA is connected to a live wire L1, the other end of the change-over switch SA is connected with a power supply end of the liquid level controller, a signal end of the liquid level controller is connected with the liquid level sensor, and an electric energy output end of the liquid level controller is connected with a coil of a first time relay KT 1; one end of a time-delay closed normally-open contact of the first time relay KT1 is connected to a live wire L1, and the other end of the time-delay closed normally-open contact is connected with a coil of the second time relay KT 2; one end of a time-delay disconnection normally-open contact of the second time relay KT2 is connected to a live wire L1, and the other end of the time-delay disconnection normally-open contact is connected with a coil of the contactor KM 1.
Further, the liquid level sensor comprises a first liquid level sensor and a second liquid level sensor, the first liquid level sensor is arranged at the lower part of the glass fiber reinforced plastic chute, and the second liquid level sensor is arranged at the upper part of the glass fiber reinforced plastic chute.
Furthermore, the main circuit also comprises a safety FU, an air circuit breaker QS and main contacts of a thermal relay FR, and three-phase alternating current power supply leads L1, L2 and L3 are connected with the safety FU, the air circuit breaker QS, a first normally open contact of a contactor KM1, the main contacts of the thermal relay FR and the fan in sequence.
Further, this electrical control system still includes the manual control circuit, the manual control circuit includes the second normally open contact of stop button SB1, start button SB2 and contactor KM1, the one end of stop button SB1 is connected to change over switch SA, and the other end passes through start button SB2 and is connected with the coil of contactor KM1, the second normally open contact of contactor KM1 is connected with start button SB2 in parallel.
Further, the power supply device further comprises an operation indicator light HG, wherein the operation indicator light HG is connected with a live wire L1 through a third normally-open contact of the contactor KM 1.
Further, a stop indicator HR connected to the live line L1 through a normally closed contact of the contactor KM1 is further included.
Furthermore, auxiliary contacts of a fuse FU and a thermal relay FR are arranged on a line led out from the live line L1.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model discloses a liquid delivery pump and cooling tower fan interlocking electrical control system, liquid pass through the liquid delivery pump and get into the cooling tower, get into the glass steel chute from the tower export, when the liquid level rises in the glass steel chute, submerge two level sensor after, the circuit switches on, each electrical components action, cooling tower fan automatic start, when the liquid delivery pump stops, the liquid level descends in the glass steel chute, expose the second level sensor of top, the circuit breaks off, the cooling tower fan automatic stop; the cooling tower fans are controlled in a centralized manner, automatic start and stop are realized, and operators do not need to go up and down three-layer stair operation equipment; the fan is started in time, and the liquid can be cooled in time; the fan is in time closed, practices thrift the electric energy, and 1 cooling tower fan can operate 10 hours less every day, and 15 days maintenance time are got rid of every year, and fan power 30kw, every degree electricity 0.56 yuan, cooling tower fan normal operating 350 days can practice thrift the charges of electricity annually: 1 station 10 hours 30kw 0.56 yuan 350 days =5.88 ten thousand yuan, effectively controls the ineffective loss of the fan electric energy; the cooling tower fan can be stopped in time, the service life of the equipment is prolonged, and the annual maintenance cost is saved by about 2 ten thousand yuan; the cooling tower fan has large running sound and can reduce noise pollution.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic circuit diagram of an electrical control system for interlocking a liquid delivery pump and a cooling tower fan according to an embodiment of the present invention.
The reference numbers in the figures denote:
1. the system comprises a contactor, a first normally open contact of the contactor, a fan, a safety device, an air circuit breaker, a thermal relay, a main contact of the thermal relay, a thermal relay auxiliary contact of the thermal relay, a transfer switch, a liquid level controller of the thermal relay, a liquid level sensor of the thermal relay, a first liquid level sensor of the thermal relay, a second liquid level sensor of the thermal relay, a glass fiber reinforced plastic chute of the thermal relay, a coil of a first time relay, a normally open contact of the first time relay, a coil of a second time relay, a normally open contact of the second time relay, a stop button of the second time relay, a start button of the second time relay, a normally open contact of the contactor, a coil of the contactor, an operation indicator light of the contactor, a third normally open contact of the contactor, a stop indicator light of the contactor, and a normally.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1, the electrical control system for interlocking the liquid delivery pump and the cooling tower fan of the present embodiment includes a main circuit, an automatic control circuit, and a manual control circuit.
The main circuit comprises a safety FU (3), an air circuit breaker QS (4), a first normally open contact 1 of a contactor KM1, a main contact 5 of a thermal relay FR and a fan 2, and three-phase alternating current power supply leads of the circuit from L1, L2 and L3 are sequentially connected with the safety FU (3), the air circuit breaker QS (4), the first normally open contact 1 of the contactor KM1, the main contact 5 of the thermal relay FR and the fan 2.
The automatic control circuit comprises a change-over switch SA (7), a liquid level controller 8, a first liquid level sensor 9, a second liquid level sensor 10, a first time relay KT1, a second time relay KT2 and a coil 19 of a contactor KM1, wherein one end (1, 3 and 5 contacts) of the change-over switch SA (7) passes through an auxiliary contact 6 of a thermal relay FR, a safety FU (3) is connected to a live wire L1, the other end (2, 4 and 6 contacts) is connected with the 1 and 3 contacts of the liquid level controller 8, the C contact of the liquid level controller 8 is connected with the first liquid level sensor 9, the D contact of the liquid level controller 8 is connected with the second liquid level sensor 10, the first liquid level sensor 9 is arranged at the lower part of a glass fiber reinforced plastic chute 11, the second liquid level sensor 10 is arranged at the upper part of the glass fiber reinforced plastic chute 11, and the second liquid level sensor 10 can effectively cool liquid in the, according to the height of glass steel chute 11 liquid level, the size of flow, fix in suitable position, 4 contacts of liquid level controller 8 are connected with first time relay KT 1's coil 12, the closed normally open contact 13 one end of time delay of first time relay KT1 is connected to live wire L1, the other end is connected with second time relay KT 2's coil 14, the open contact 15 one end of time delay disconnection KT of second time relay 2 is connected to live wire L1, the other end is connected with contactor KM 1's coil 19.
The manual control circuit comprises a stop button SB1 (16), a start button SB2 (17) and a second normally open contact 18 of a contactor KM1, one end of the stop button SB1 (16) is connected with contacts 2, 4 and 6 of a transfer switch SA (7), the other end of the stop button SB1 (16) is connected with a coil 19 of a contactor KM1 through a start button SB2 (17), and the second normally open contact 18 of the contactor KM1 is connected with the start button SB2 (17) in parallel.
The electric appliance control system further comprises an operation indicator light HG (20) and a stop indicator light HR (22), wherein the operation indicator light HG (20) is connected with a live wire L1 through a third normally-open contact 21 of the contactor KM1, and the stop indicator light HR (22) is connected with a live wire L1 through a normally-closed contact 23 of the contactor KM 1.
The working principle is as follows:
starting up manually: the method comprises the steps that an air circuit breaker QS (4) is switched on, a transfer switch SA (7) is switched to a manual position, a starting button SB2 (17) is pressed, a contactor KM1 is electrified and self-locked, a third normally open contact 21 of the contactor KM1 is closed, an operation indicator lamp HG (20) is on, a normally closed contact 23 of the contactor KM1 is disconnected, an indicator lamp HR (22) is stopped, a first normally open contact 1 of the contactor KM1 is closed, and a cooling tower fan 2 operates.
The machine is shut down manually: when the stop button SB1 (16) is pressed, the coil 19 of the contactor KM1 loses power, the third normally open contact 21 of the contactor KM1 is disconnected, the operation indicator lamp HG (20) is turned off, the normally closed contact 23 of the contactor KM1 is closed, the stop indicator lamp HR (22) is on, the first normally open contact 1 of the contactor KM1 is disconnected, and the cooling tower fan 2 stops running.
Automatic startup: close air circuit breaker QS (4), automatic position is got to change over switch SA (7), when first level sensor 9 and second level sensor 10 contacted liquid simultaneously in glass steel chute 11, liquid level controller 8 's 3, 4 contact closure, first time relay KT 1's coil 12 received electricity, first time relay KT 1's time delay closure normally open contact 13 was closed after 5 minutes of time delay, second time relay KT 2's coil 14 received electricity, second time relay KT 2's time delay disconnection normally open contact 15 closed in the twinkling of an eye, contactor KM 1's coil 19 received electricity, contactor KM 1's third normally open contact 21 was closed, operation pilot lamp HG (20) are bright, contactor KM 1's normally closed contact 23 disconnection, stop pilot lamp HR (22) go out, contactor KM 1's first normally open contact 1 is closed, cooling tower fan 2 operates.
The machine is stopped automatically: after the second liquid level sensor 10 leaves the liquid level in the glass steel chute 11, the 3 and 4 contacts of the liquid level controller 8 are powered off, the coil 12 of the first time relay KT1 is powered off, the time delay closed normally-open contact 13 of the first time relay KT1 is instantly disconnected, the coil 14 of the second time relay KT2 is powered off, the time delay open normally-open contact 15 of the second time relay KT2 is disconnected after being delayed for 30 seconds, the coil 19 of the contactor KM1 is powered off, the third normally-open contact 21 of the contactor KM1 is disconnected, the operation indicator lamp HG (20) is turned off, the normally-closed contact 23 of the contactor KM1 is closed, the stop indicator lamp HR (22) is on, the first normally-open contact 1 of the contactor KM1 is disconnected, and the cooling tower.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Finally, it is to be noted that: the above description is only the preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention is included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a liquid delivery pump and interlocked electrical control system of cooling tower fan which characterized in that includes:
the main circuit comprises a first normally open contact of a contactor KM1 and a fan, wherein one end of the first normally open contact of the contactor KM1 is connected to a three-phase alternating current power supply L1, L2 and L3, and the other end of the first normally open contact of the contactor KM1 is connected with the fan;
and an automatic control circuit, including a transfer switch SA, a liquid level controller, a liquid level sensor, a first time relay KT1, a second time relay KT2 and a coil of a contactor KM 1; one end of the change-over switch SA is connected to a live wire L1, the other end of the change-over switch SA is connected with a power supply end of the liquid level controller, a signal end of the liquid level controller is connected with the liquid level sensor, and an electric energy output end of the liquid level controller is connected with a coil of a first time relay KT 1; one end of a time-delay closed normally-open contact of the first time relay KT1 is connected to a live wire L1, and the other end of the time-delay closed normally-open contact is connected with a coil of the second time relay KT 2; one end of a time-delay disconnection normally-open contact of the second time relay KT2 is connected to a live wire L1, and the other end of the time-delay disconnection normally-open contact is connected with a coil of the contactor KM 1.
2. The electrical control system for interlocking a liquid transfer pump and a cooling tower fan of claim 1, wherein said liquid level sensor comprises a first liquid level sensor disposed in a lower portion of a glass reinforced plastic chute and a second liquid level sensor disposed in an upper portion of the glass reinforced plastic chute.
3. The electrical control system of claim 1, wherein the main circuit further comprises main contacts of a safety FU, an air circuit breaker QS and a thermal relay FR, and the three-phase AC power supply leads L1, L2 and L3 are connected with the safety FU, the air circuit breaker QS, the first normally open contact of the contactor KM1, the main contact of the thermal relay FR and the fan in sequence.
4. The electrical control system for interlocking a liquid delivery pump and a cooling tower fan as claimed in claim 1, further comprising a manual control circuit, wherein the manual control circuit comprises a stop button SB1, a start button SB2 and a second normally open contact of a contactor KM1, one end of the stop button SB1 is connected to the transfer switch SA, the other end of the stop button SB1 is connected with a coil of a contactor KM1 through a start button SB2, and the second normally open contact of the contactor KM1 is connected with the start button SB2 in parallel.
5. The electrical control system for interlocking a liquid delivery pump and a cooling tower fan as claimed in claim 1, further comprising an operation indicator lamp HG, wherein the operation indicator lamp HG is connected with a live line L1 through a third normally open contact of a contactor KM 1.
6. The electrical control system for interlocking a liquid delivery pump and a cooling tower fan as claimed in claim 1, further comprising a stop indicator HR connected to live line L1 through a normally closed contact of contactor KM 1.
7. The electrical control system for interlocking a liquid transfer pump and a cooling tower fan according to claim 5 or 6, wherein auxiliary contacts of a safety FU and a thermal relay FR are arranged on a line leading from the live line L1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021187642.4U CN212778842U (en) | 2020-06-24 | 2020-06-24 | Electric control system for interlocking liquid delivery pump and cooling tower fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021187642.4U CN212778842U (en) | 2020-06-24 | 2020-06-24 | Electric control system for interlocking liquid delivery pump and cooling tower fan |
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| CN212778842U true CN212778842U (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021187642.4U Active CN212778842U (en) | 2020-06-24 | 2020-06-24 | Electric control system for interlocking liquid delivery pump and cooling tower fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589859A (en) * | 2021-07-20 | 2021-11-02 | 苏州市东雄精密模具塑业有限公司 | Cooling tower water temperature control device |
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2020
- 2020-06-24 CN CN202021187642.4U patent/CN212778842U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589859A (en) * | 2021-07-20 | 2021-11-02 | 苏州市东雄精密模具塑业有限公司 | Cooling tower water temperature control device |
| CN113589859B (en) * | 2021-07-20 | 2022-08-09 | 苏州市东雄精密模具塑业有限公司 | Cooling tower water temperature control device |
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