CN2553411Y

CN2553411Y - Electric controller for secondary pressure water-supply equipment

Info

Publication number: CN2553411Y
Application number: CN 02201818
Authority: CN
Inventors: 滑中锋; 张建
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-01
Filing date: 2002-01-01
Publication date: 2003-05-28
Anticipated expiration: 2012-01-01

Abstract

The utility model discloses an electric controller for secondary pressure water-supply equipment. The utility model is suitable for the dual pump water-supply equipment. The utility model comprises a cabinet body (2) and a control circuit which is arranged in the cabinet body (2). The control circuit is formed through connecting the midget universal relays KA1 to KA6, the alternating current contactors KM1 and KM2, an electro connecting pressure gauge (1) and other components. The utility model has the advantages of simple control circuit, easily judged fault part, easy operation and maintenance, and long service life of the control components. The relay of the control circuit works at the moment of starting and stopping the water pump.

Description

Second pressure water supply equipment electrical control device

Technical field:

The utility model relates to a kind of second pressure water supply equipment electrical control device, is applicable on the double pump supply equipment.

Background technology:

Patent CN-2318793Y discloses a kind of automatic water supply device electrical control cabinet that is used for double pump, it adopts auxiliary reclay and multiconductor mechanical switch to control, control circuit is very complicated, various mechanical switchs are more, dependence between the each several part is difficult for the failure judgement position than higher when breaking down, be unfavorable for using and safeguarding, and relay is simultaneously also in running order during pump working in the middle of it, has reduced the serviceable life of auxiliary reclay.

Summary of the invention:

The purpose of this utility model is to provide a kind of second pressure water supply equipment electrical control device, its control circuit is simple, easily the failure judgement position, be convenient to operation and maintenance, the control assembly long service life.

For this reason, the concrete technical scheme of the utility model second pressure water supply equipment electrical control device employing is:

By A.C. contactor KM1, the corresponding control of A.C. contactor KM2 I pump motor M1, the commentaries on classics of II pump motor M2 stops, by one group of normally opened contact of relay K A1 with after one group of normally opened contact of A.C. contactor KM1 is in parallel, connect with the one group of normally closed contact of relay K A2 and the coil of A.C. contactor KM1, constitute the I loop, by one group of normally opened contact of relay K A3 with after one group of normally opened contact of A.C. contactor KM2 is in parallel, connect with the one group of normally closed contact of relay K A4 and the coil of A.C. contactor KM2, constitute the II loop, the I loop is in parallel with the II loop, two groups of normally closed contacts of relay K A5 respectively with relay K A1, after the coil series connection of relay K A2, correspondence connects two contacts of electro connecting pressure gauge, two groups of normally opened contacts of relay K A5 respectively with relay K A3, after the coil series connection of relay K A4, correspondence connects two contacts of electro connecting pressure gauge.

As a kind of improvement of the present utility model, the I loop is with after the II loop is in parallel, with after the normally opened contact of relay K A6 is connected, connects power supply more again, and the power phase that coil connects of A.C. contactor KM1, KM2, to connect power phase variant with the coil of relay K A6.

As another improvement of the present utility model, in the I loop, be in series with another group normally closed contact of relay K A4, in the II loop, be in series with another group normally closed contact of relay K A2.

The utility model adopts midget universal relay as the major control parts, and control assembly is less, and interface is less between the control circuit each several part, easy failure judgement position when breaking down, easy operating and maintenance; When pump working, the relay in the control circuit is idle, and promptly relay has so just prolonged the serviceable life of pilot relay just at starting mode of pump and the snap action that stops.In addition, because the power phase that A.C. contactor KM1 and KM2 coil use is variant with the power phase that relay K A6 coil uses; like this, as long as lack arbitrary phase time in the three-phase, motor all can not get electric work; thereby realized open-phase protection, avoided motor to be burnt out because of phase shortage.

Description of drawings:

Fig. 1 is the utility model external structure synoptic diagram.

Fig. 2 is a circuit diagram of the present utility model.

Embodiment:

As shown in Figure 1 and Figure 2, I pump motor M1 is controlled by A.C. contactor KM1, II pump motor M2 is controlled by A.C. contactor KM2, one group of normally opened contact KA1-1 of relay K A1 is with after one group of normally opened contact KM1-1 of A.C. contactor KM1 is in parallel, connect with the one group of normally closed contact KA2-2 of relay K A2 and the coil of A.C. contactor KM1, constituted the I loop, the I loop is the governor circuit of control I pump running; One group of normally opened contact KA3-1 of relay K A3 is with after one group of normally opened contact KM2-1 of A.C. contactor KM2 is in parallel, connect with the one group of normally closed contact KA4-2 of relay K A4 and the coil of A.C. contactor KM2, constituted the II loop, the II loop is the governor circuit of control II pump running; The I loop is in parallel with the II loop.2. one group of normally closed contact KA5-2 of relay K A5 goes up with the contact that is connected on electro connecting pressure gauge 1 after the coil of relay K A1 is connected, 3. the contact that is connected on electro connecting pressure gauge 1 after another of relay K A5 organized normally closed contact KA5-4 and the coil of relay K A2 is connected is gone up, and has constituted the auxiliary control circuit in I loop; 2. one group of normally opened contact KA5-1 of relay K A5 goes up with the contact that is connected on electro connecting pressure gauge 1 after relay K A3 coil is connected, 3. the contact that is connected on electro connecting pressure gauge 1 after another of relay K A5 organized normally opened contact KA5-3 and relay K A4 coil is connected is gone up, and has constituted the auxiliary control circuit in II loop.

In addition; the I loop is with after the II loop is in parallel; can be again with after the normally opened contact KA6-1 of relay K A6 connects; connect power supply again; and the power phase that coil connects of A.C. contactor KM1, KM2; variant with the power phase that coil connects of relay K A6; as shown in Figure 2; the coil of relay K A6 meets power supply V and W mutually, and the coil of its normally opened contact KA6-1 and A.C. contactor KM1, KM2 meets power supply V and U mutually; as long as power supply phase shortage; A.C. contactor KM1, KM2 coil just must not be electric, and I pump or II pump are not just worked, and have so just constituted open-phase protection circuit.In addition; I pump motor M1 is connected on the air-break QS by electrothermal relay FR1, A.C. contactor KM1; II pump motor M2 is connected on the air-break QS by electrothermal relay FR2, A.C. contactor KM2, and air-break is connected on power supply U, V, W goes up mutually, forms kinds of protect.

Principle of work of the present utility model is as follows,

During the I loop works: relay K A5 coil losing electricity, its normally closed contact KA5-2, KA5-4 are closed, when hydraulic pressure was lower than low pressure limit setting value a1,1., 2. the contact of electro connecting pressure gauge 1 was connected, and the coil of relay K A1 is got.Behind the KA1 coil electricity, its normally opened contact KA1-1 closure, the coil of A.C. contactor KM1 gets electric, i.e. coil → KA6-1 of U phase → KA1-1 → KA2-2 → KM1 → FR2-2 → FR1-2 → V phase.Behind the KM1 coil electricity, the I water pump is activated.A.C. contactor KM1 normally opened contact KM1-1 self-locking simultaneously, along with the running of water pump, hydraulic pressure rises, 1. the 2. two contacts disconnection of electro connecting pressure gauge 1, relay K A1 coil losing electricity, relay contact KA1-1 disconnect, and so just make relay K A1 only work in startup moment of water pump.At this moment the power circuit of KM1 coil is: coil → KA6-1 of U phase → KM1-1 → KA2-2 → KM1 → FR2-2 → FR1-2 → V phase.

Along with the running of water pump, (during a2＞a1), the contact of electro connecting pressure gauge 1 1., 3. connect makes the coil electricity of relay K A2 when hydraulic pressure is higher than upper pressure limit setting value a2.Behind the coil electricity of relay K A2, its normally closed contact KA2-2 disconnects, A.C. contactor KM1 coil losing electricity, and the I pump shuts down.Along with the stall of water pump, hydraulic pressure descends, electro connecting pressure gauge 1 1., 9. two contacts disconnect, relay K A2 coil losing electricity, the KA2-2 closure so just makes relay K A2 only work in shutdown moment of water pump.

In like manner, during the II loop works, the running of control II water pump.Relay K A5 coil gets electric, and its normally opened contact KA5-1, KA5-3 are closed, and when hydraulic pressure was lower than low pressure limit setting value a1,1., 2. the contact of electro connecting pressure gauge 1 was connected, and made the coil electricity of relay K A3.After the KA3 energising, its normally opened contact KA3-1 closure, the coil of A.C. contactor KM2 gets electric, i.e. coil → KA6-1 of U phase → KA3-1 → KA4-2 → KM2 → FR2-2 → FR1-2 → V phase.Behind the KM2 coil electricity, the II pump is activated.Its normally opened contact KM2-1 self-locking simultaneously, along with the running of water pump, hydraulic pressure rises, electro connecting pressure gauge 1 1. 2. two contacts disconnect, relay K A3 coil losing electricity, relay contact KA3-1 disconnects, and so just makes relay K A3 only work in startup moment of water pump.At this moment the power circuit of KM2 coil is: coil → KA6-1 of U phase → KM2-1 → KA4-2 → KM2 → FR2-2 → FR1-2 → V phase.

Along with pump operation, (during a2＞a1), the contact of electro connecting pressure gauge 1 1., 3. connect makes the coil electricity of relay K A4 when hydraulic pressure is higher than upper pressure limit setting value a2.Behind the coil electricity of relay K A4, its normally closed contact KA4-2 disconnects, A.C. contactor KM2 coil losing electricity, and the II pump shuts down.Along with the stall of water pump, hydraulic pressure descends, electro connecting pressure gauge 1 1., 3. two contacts disconnect, relay K A4 coil losing electricity, the KA4-2 closure so just makes relay K A4 only work in shutdown moment of water pump.

Take turns to work for making two water pumps, coil losing electricity that can be by switch 5 pilot relay KA5 or, make I pump or II pump work, i.e. the coil of switch 5 and relay K A5 series connection back one terminates at power supply U and goes up mutually, and the other end is connected on the normally opened contact KA6-1 of relay K A6.When switch 5 places position I, the coil losing electricity of relay K A5, its normally closed contact KA5-2, KA5-4 closure, its normally opened contact KA5-1, KA5-3 disconnect, the I loop works; When switch 5 placed position II, the coil of relay K A5 got electric, its normally opened contact KA5-1, KA5-3 closure, and its normally closed contact KA5-2, KA5-4 disconnect, the II loop works.In addition, can set the alternation time of two water pumps, be automaticallyed switch in two loops, not work long hours, reach the purpose of protection motor to guarantee each road by time controller KT.Time controller KT is connected between power supply U and the relay normally open contact KA6-1, and its normally opened contact KT-1 connects with switch.During automatic switchover, switch 5 places position III, when time controller contact KT-1 disconnects, and relay K A5 coil losing electricity, system is in I pump work state; When time controller contact KT-1 was closed, relay K A5 coil got electric, and system is in II pump work state.

In addition, have this situation, when electro connecting pressure gauge 1 by 2. in process 3., if the I pump is worked, this moment as switch to the II loop, relay K A2 coil just can not get electric, the I pump just can not be shut down; If the II pump is worked, this moment, relay K A4 coil just can not get electric as switching to the I loop, and the II pump just can not be shut down.For preventing this from occurring, can in the I loop, be in series with another group normally closed contact KA4-4 of relay K A4, in the II loop, be in series with another group normally closed contact KA2-4 of relay K A2.No matter which gets electricly for relay K A2 or KA4 coil, another loop is cut off like this.

In addition, can with hand push button 4 replace electro connecting pressure gauge 1 1., 2. contact and 1., the 3. closure of contact, be that hand push button 4 one terminates at power supply U and goes up mutually, the other end is connected on the 2. number line of electro connecting pressure gauge 1 respectively and 9. on number line, the 1. number line of electro connecting pressure gauge 1 is connected on power supply U and goes up mutually.Which kind of state guard system is not in, and all can directly use hand push button 4 to start and shuts down.For showing the duty of two water pumps, can on the coil of A.C. contactor KM1, KM2, distinguish parallel running pilot lamp 3.Relay K A1, KA2, KA3, KA4, KA5, KA6 can adopt JTX type midget universal relay, and adopt plug-in, and easy access is safeguarded.As shown in Figure 1, relay indicating light 3, hand push button 4 and switch 5 are only arranged on the utility model cabinet 2 panels, components and parts such as relay, time controller, A.C. contactor all can place in the control cabinet 2, and are simple in structure, are convenient to operation and maintenance.

Claims

1, a kind of second pressure water supply equipment electrical control device, by A.C. contactor KM1, the corresponding control of A.C. contactor KM2 I pump motor M1, the commentaries on classics of II pump motor M2 stops, it is characterized in that: by one group of normally opened contact (KA1-1) of relay K A1 with after one group of normally opened contact (KM1-1) of A.C. contactor KM1 is in parallel, connect with the one group of normally closed contact (KA2-2) of relay K A2 and the coil of A.C. contactor KM1, constitute the I loop, by one group of normally opened contact (KA3-1) of relay K A3 with after one group of normally opened contact (KM2-1) of A.C. contactor KM2 is in parallel, connect with the one group of normally closed contact (KA4-2) of relay K A4 and the coil of A.C. contactor KM2, constitute the II loop, the I loop is in parallel with the II loop, two groups of normally closed contacts (KA5-2) of relay K A5, (KA5-4) respectively with relay K A1, after the coil series connection of relay K A2, two contacts that correspondence connects electro connecting pressure gauge (1) 2., 3., two groups of normally opened contacts (KA5-1) of relay K A5, (KA5-3) respectively with relay K A3, after the series connection of the coil of relay K A4, two contacts that correspondence connects electro connecting pressure gauge (1) 2., 3..

2, second pressure water supply equipment electrical control device according to claim 1, it is characterized in that: described I loop is with after the II loop is in parallel, again with after the normally opened contact (KA6-1) of relay K A6 is connected, connect power supply again, and the power phase that coil connects of A.C. contactor KM1, KM2, to connect power phase variant with the coil of relay K A6.

3, second pressure water supply equipment electrical control device according to claim 1, be characterised in that: in the I loop, be in series with another group normally closed contact (KA4-4) of relay K A4, in the II loop, be in series with another group normally closed contact (KA2-4) of relay K A2.