CN209385325U - A kind of control circuit controlling more small pumps using a liquid-level switch - Google Patents
A kind of control circuit controlling more small pumps using a liquid-level switch Download PDFInfo
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- CN209385325U CN209385325U CN201821886949.6U CN201821886949U CN209385325U CN 209385325 U CN209385325 U CN 209385325U CN 201821886949 U CN201821886949 U CN 201821886949U CN 209385325 U CN209385325 U CN 209385325U
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- liquid
- level switch
- control circuit
- small pump
- small
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Abstract
The utility model discloses a kind of control circuits that more small pumps are controlled using a liquid-level switch, including several small pump control loops and a high water tank acquisition control circuit；It is in series with liquid-level switch and liquid-level switch relay on the high water tank acquisition control circuit, small pump pressure switch, liquid-level switch relay auxiliary contact, small pump contactor are provided in the small pump control loop；The movement of the liquid-level switch relay auxiliary contact is consistent with liquid-level switch relay；This controls more small pumps using only a liquid-level switch using the control circuit that a liquid-level switch controls more small pumps, reduces electrical components usage amount and cable arrangement amount.
Description
Technical field
The utility model relates to heat supply process fields, in particular to a kind of to control more small pumps using a liquid-level switch
Control circuit.
Background technique
The case where more heat-exchange units are put in setting in a heat exchange station is frequently appeared in central heating system, and it is usual
One replenishing water tank of water is only installed in one heat exchange station.It needs to be that each small pump is matched on water tank according to traditional control method
A liquid-level switch is set as small pump excessive low water level protection, prevents small pump from causing to damage because of inlet water pressure deficiency.
Small pump controls wiring diagram as shown in Figure 1, the control circuit schematic diagram of traditional control method is as shown in Fig. 2, when two sets
When heating system ductwork pressure is not up to setting value, the pressure switch K1 of small pump 1 and the pressure switch K4 of small pump 2 are equal
In closed state.When the same water tank of ordinary circumstance installs multiple liquid-level switches, installation site is in same level height,
When inner water tank liquid level of standing is higher than liquid-level switch installation site, 1 liquid-level switch K2 of small pump and 2 liquid-level switch K3 of small pump locates
In closed state.The contact of small pump 1 contactor KM1 and small pump 2 when such as powering at this time, and meeting other service conditions
Device KM2 is attracted, small pump 1 and the starting operation of small pump 2.When certain set system pipe network pressure reaches setting value in two systems,
Small pump pressure switch disconnects, and the small pump of control is out of service；When high water tank is lower than liquid-level switch installation site two
Platform small pump liquid-level switch disconnects, and two small pumps are simultaneously stopped operation, achievees the purpose that protect small pump.
But it is more that electrical component is not used only for this control mode, and its mating route is also therewith in actual installation process
Increase, installation work amount is caused to increased.As the control line of small pump 2 is directly connected to 1 liquid-level switch K2 of small pump
Position, as shown in 3 figures:
Liquid-level switch such as is installed according to foregoing circuit figure, then after 1 liquid-level switch K2 of small pump closure, only when two sets
After heating system ductwork pressure reaches setting value, i.e. 1 pressure switch K1 of small pump and 2 pressure switch K4 of small pump are disconnected
Afterwards, two small pumps can be just simultaneously stopped, and if only if mending when wherein any a set of heating system ductwork pressure is lower than setting value
When any one closure of 1 pressure switch K1 of water pump and 2 pressure switch K4 of small pump, 1 contactor KM1 of small pump and small pump 2 are connect
Tentaculum KM2 is attracted simultaneously, and two small pumps start simultaneously.According to the method, it will lead to the one of system of two sets of heating systems
Net superpressure or hypotony under the overall leadership cause to stop hot accident.
Utility model content
The purpose of the utility model is to provide a kind of control circuits that more small pumps are controlled using a liquid-level switch.
For this purpose, technical solutions of the utility model are as follows:
A kind of control circuit controlling more small pumps using a liquid-level switch, which is characterized in that including several benefits
Water pump control loop and a high water tank acquisition control circuit；Liquid level is in series on the high water tank acquisition control circuit
Switch and liquid-level switch relay are provided with small pump pressure switch, liquid-level switch relay in the small pump control loop
Auxiliary contact, small pump contactor；The movement of the liquid-level switch relay auxiliary contact and liquid-level switch relay keep one
It causes.
Further, the liquid-level switch relay in the high water tank acquisition control circuit is several liquid in parallel
Bit switch relay group.
Compared with prior art, a liquid is used only using the control circuit that a liquid-level switch controls more small pumps in this
Bit switch controls more small pumps, reduces electrical components usage amount and cable arrangement amount.
Detailed description of the invention
Fig. 1 is that small pump controls wiring diagram.
Fig. 2 is existing small pump control principle drawing.
Fig. 3 is the schematic diagram of utilization one liquid-level switch control that is a kind of simple but not being suitable for heat supply water charging system.
Fig. 4 is the principle of the control circuit provided by the utility model that two small pumps are controlled using a liquid-level switch
Figure.
Fig. 5 is high water tank acquisition control circuit theory figure when controlling more small pumps using a liquid-level switch.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described further the utility model, but following embodiments are right absolutely not
The utility model has any restrictions.
A kind of control circuit controlling more small pumps using a liquid-level switch, including several small pump control loops
With a high water tank acquisition control circuit；Liquid-level switch is in series on the high water tank acquisition control circuit and liquid level is opened
Relay is closed, is provided with small pump pressure switch, liquid-level switch relay auxiliary contact, moisturizing in the small pump control loop
Pump contactor；The movement of the liquid-level switch relay auxiliary contact is consistent with liquid-level switch relay.
As shown in figure 5, the liquid-level switch relay in the high water tank acquisition control circuit is that several are in parallel
Liquid-level switch relay group.
By taking two small pumps as an example, control circuit as shown in 4 figures,
On the basis of original control circuit, only retains a liquid-level switch K, liquid-level switch K is independently arranged a control
Circuit processed increases liquid-level switch relay KA, uses auxiliary contact " the liquid-level switch relay auxiliary of liquid-level switch relay KA
" 1 liquid-level switch K2 of small pump " and " 2 liquid of small pump in contact 1 " and " liquid-level switch relay auxiliary contact 2 " replacement primary circuit
The position of bit switch K3 ".When high water tank is higher than liquid-level switch K installation site, liquid-level switch K closure, while triggering liquid level
Switch relay KA, " auxiliary contact 1 of liquid-level switch relay KA " and " liquid-level switch relay auxiliary contact 2 " are closed.?
When high water tank is higher than liquid-level switch K installation site, when 1 place heat supplying loop pressure reduction of small pump, 1 pressure of small pump is opened
K1 closure is closed, 1 contactor KM1 of small pump closure, small pump 1, which is connected, carries out moisturizing, it will not influence the work of small pump 2 at this time,
Realize two moisturizing circuits control separation with do not interfere with each other.Similarly, it is higher than liquid-level switch K installation site in high water tank
When, when 2 place heat supplying loop pressure reduction of small pump, 2 pressure switch K4 of small pump closure, 2 contactor KM2 of small pump is closed
It closes, small pump 2, which is connected, carries out moisturizing.
Installation is, it can be achieved that two small pumps are respectively that respective steady of system press is not interfere with each other, and works as water tank according to the method
When liquid level is lower than liquid-level switch K installation site, 1 contactor KM1 of small pump and 2 contactor KM2 of small pump, which are simultaneously switched off, makes moisturizing
Pump 1 and small pump 2 are out of service.Quantity if you need to control small pump is more than the maximum value of the auxiliary contact of a relay, then
Relay can increased in control loop where liquid-level switch KA, be arranged in parallel with liquid-level switch relay KA, as shown in Figure 5.
Claims (2)
1. a kind of control circuit for controlling more small pumps using a liquid-level switch, which is characterized in that including several moisturizings
Pump control loop and a high water tank acquisition control circuit；Liquid level is in series on the high water tank acquisition control circuit to open
It closes and liquid-level switch relay, it is auxiliary to be provided with small pump pressure switch, liquid-level switch relay in the small pump control loop
Help contact, small pump contactor；The movement of the liquid-level switch relay auxiliary contact is consistent with liquid-level switch relay.
2. the control circuit according to claim 1 for controlling more small pumps using a liquid-level switch, which is characterized in that
The liquid-level switch relay in the high water tank acquisition control circuit is several liquid-level switch relay groups in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821886949.6U CN209385325U (en) | 2018-11-16 | 2018-11-16 | A kind of control circuit controlling more small pumps using a liquid-level switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821886949.6U CN209385325U (en) | 2018-11-16 | 2018-11-16 | A kind of control circuit controlling more small pumps using a liquid-level switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209385325U true CN209385325U (en) | 2019-09-13 |
Family
ID=67864722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821886949.6U Active CN209385325U (en) | 2018-11-16 | 2018-11-16 | A kind of control circuit controlling more small pumps using a liquid-level switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209385325U (en) |
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2018
- 2018-11-16 CN CN201821886949.6U patent/CN209385325U/en active Active
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