CN205141656U - Automatic congruence that entangles of bridge crane air conditioner lacks looks protection device - Google Patents
Automatic congruence that entangles of bridge crane air conditioner lacks looks protection device Download PDFInfo
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- CN205141656U CN205141656U CN201520849600.5U CN201520849600U CN205141656U CN 205141656 U CN205141656 U CN 205141656U CN 201520849600 U CN201520849600 U CN 201520849600U CN 205141656 U CN205141656 U CN 205141656U
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- contactor
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- bridge crane
- power supply
- relay
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Abstract
The utility model discloses an automatic congruence that entangles of bridge crane air conditioner lacks looks protection device, contactor KM1's the load end 2a who normally opens the main contacts, 4a, 6a and contactor KM2's the load end 6b who normally opens the main contacts, 4b, 2b respectively with bridge crane air conditioner system power supply's input R, S, T links to each other, the normal close auxiliary contact that phase sequence relay PR leading -out terminal 12 looped through contactor KM2's coil and contactor KM1 links to each other with auxiliary relay KA's normally open contact, the normal close auxiliary contact that phase sequence relay PR leading -out terminal 14 looped through contactor KM1's coil and contactor KM2 links to each other with auxiliary relay KA's normally open contact, auxiliary relay KA's normally open contact's the other end and the phase line L1 of power link to each other, and through auxiliary relay KA's the coil and the phase line L2 of power. The utility model discloses simple structure, convenient to use can ensure effectively that the bridge crane air conditioner system obtains the power of correct phase sequence, has realized the open -phase protection to the bridge crane air conditioner system simultaneously to bridge crane air conditioner's normal operating has been guaranteed.
Description
Technical field
The utility model relates to bridge crane air conditioning field, specifically, is related specifically to a kind of bridge crane air conditioning and automatically entangles mutually and phase-lacking protective device.
Background technology
Driving operates in the industrial environment such as steel mill, coke-oven plant throughout the year, and bridge crane air conditioning is installed in driving to carry out thermoregulator device, for driver provides the equipment of comfortable operational environment to driving drivers' cab air.
Because driving running environment is complicated, power issue is complicated, easily occurs that phase sequence is put upside down thus causes air-conditioning normally not start, need the phase sequence of artificial adjustment power supply, just can restart, the difficulty of onsite application certainly will be increased like this, and easily cause security incident or device damage.More seriously, bridge crane air conditioning could normally must work when balanced feeding when three phase mains while.If there is a phase power interruptions to power, cause phase shortage, bridge crane air conditioning works under two-phase power supply, and be easy to burn, consequence is hardly imaginable.
Utility model content
The purpose of this utility model is for deficiency of the prior art, provides a kind of bridge crane air conditioning automatically to entangle mutually and phase-lacking protective device, to solve the problem.
The technical problem that the utility model solves can realize by the following technical solutions:
A kind of bridge crane air conditioning entangles mutually and phase-lacking protective device automatically, comprise contactor KM1, contactor KM2 and phase sequence relay PR, power end 1a, 3a, 5a of often opening main contacts of described contactor KM1 are connected with three phase line L1, L2, L3 of power supply respectively, and load end 2a, 4a, 6a of often opening main contacts of contactor KM1 connect with input R, the S of bridge crane air conditioning system power supply, T-phase respectively; Power end 1b, 3b, 5b of often opening main contacts of described contactor KM2 are connected with three phase line L1, L2, L3 of power supply respectively, and load end 6b, 4b, 2b of often opening main contacts of contactor KM2 connect with input R, the S of bridge crane air conditioning system power supply, T-phase respectively; Phase sequence relay PR end of incoming cables is connected with three phase line L1, L2, L3 of power supply respectively, phase sequence relay PR leading-out terminal 11 is connected with the phase line L3 of power supply, phase sequence relay PR leading-out terminal 12 is held with the coil B1 of contactor KM2 and is connected, the coil B2 end of contactor KM2 is held with the 11a of the normally closed auxiliary contact of contactor KM1 and is connected, phase sequence relay PR leading-out terminal 14 is connected with loop A 1 end of contactor KM1, and loop A 2 end of contactor KM1 is held with the 11b of the normally closed auxiliary contact of contactor KM2 and is connected; The 12b end of the normally closed auxiliary contact of contactor KM2 is held with the c1 of the normally opened contact of auxiliary relay KA respectively with the 12a end of the normally closed auxiliary contact of contactor KM1 and is connected, the c2 end of the normally opened contact of auxiliary relay KA is held with the coil C2 of auxiliary relay KA respectively and is connected with the phase line L1 of power supply, and the coil C1 end of auxiliary relay KA is connected with the phase line L2 of power supply.
Further, three phase line L1 of described power supply, L2, L3 are respectively by isolating switch QS connecting system.
Compared with prior art, the beneficial effects of the utility model are as follows:
Utilize the connection of the bridge crane air conditioning system power supply in phase sequence relay PR automatic control power supply positive phase sequence and negative-phase sequence two kinds of phase sequence situations.Contactor KM1 and contactor KM2 is added in driving air-condition electrical control system, contactor KM1 and contactor KM2 is made to form mechanical interlocked and electrical interlocks, ensure that contactor KM1 and contactor KM2 can not simultaneously electric, thus effectively ensure that safety, the reliability service of bridge crane air conditioning system.When the phase sequence of power supply input is contrary with the phase sequence of setting, automatically can put upside down phase sequence without the need to power cutoff, manual repair and open antiskid abrasiveness layer and recover normal, thus reduce personnel's maintenance time, use manpower and material resources sparingly, raise labour efficiency, reduce labour intensity, when it also avoid operation, the damage of the dangerous and bridge crane air conditioning that phase sequence abnormal belt is come, improves fail safe; When power phase shortage (disconnected phase), contactor KM1 often leaves often opening main contacts and can not connecting of main contacts and contactor KM2, and bridge crane air conditioning does not start, and effectively achieves the default-phase protection function to bridge crane air conditioning system.The utility model structure is simple; easy to use; improvement cost is cheap; safe and reliable to operation; and energy consumption low, easily implement, when effectively can guarantee that no matter phase sequence is normal or abnormal, bridge crane air conditioning system can obtain the power supply of correct phase sequence; and phase shortage (disconnected phase) protection is carried out to bridge crane air conditioning system, thus effectively ensure that the normal operation of bridge crane air conditioning.
Accompanying drawing explanation
Fig. 1 is that bridge crane air conditioning described in the utility model entangles mutually and the electrical schematic diagram of phase-lacking protective device automatically.
Embodiment
The technological means realized for making the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the utility model further.
See Fig. 1, a kind of bridge crane air conditioning described in the utility model entangles mutually and phase-lacking protective device automatically, comprises contactor KM1, contactor KM2 and phase sequence relay PR.Power end 1a, 3a, 5a of often opening main contacts of contactor KM1 are connected with three phase line L1, L2, L3 of power supply respectively, and load end 2a, 4a, 6a of often opening main contacts of contactor KM1 connect with input R, the S of bridge crane air conditioning system power supply, T-phase respectively.Power end 1b, 3b, 5b of often opening main contacts of contactor KM2 are connected with three phase line L1, L2, L3 of power supply respectively, and load end 6b, 4b, 2b of often opening main contacts of contactor KM2 connect with input R, the S of bridge crane air conditioning system power supply, T-phase respectively.Phase sequence relay PR end of incoming cables is connected with three phase line L1, L2, L3 of power supply respectively, phase sequence relay PR leading-out terminal 11 is connected with the phase line L3 of power supply, phase sequence relay PR leading-out terminal 12 is held with the coil B1 of contactor KM2 and is connected, the coil B2 end of contactor KM2 is held with the 11a of the normally closed auxiliary contact of contactor KM1 and is connected, phase sequence relay PR leading-out terminal 14 is connected with loop A 1 end of contactor KM1, and loop A 2 end of contactor KM1 is held with the 11b of the normally closed auxiliary contact of contactor KM2 and is connected.The 12b end of the normally closed auxiliary contact of contactor KM2 is held with the c1 of the normally opened contact of auxiliary relay KA respectively with the 12a end of the normally closed auxiliary contact of contactor KM1 and is connected, the c2 end of the normally opened contact of auxiliary relay KA is held with the coil C2 of auxiliary relay KA respectively and is connected with the phase line L1 of power supply, and the coil C1 end of auxiliary relay KA is connected with the phase line L2 of power supply.The normally closed auxiliary contact of contactor KM1 is serially connected with in the line loop of contactor KM2, the normally closed auxiliary contact of contactor KM2 is serially connected with in the line loop of contactor KM1, contactor KM1 and contactor KM2 is made to form mechanical interlocked and electrical interlocks, ensure that contactor KM1 and contactor KM2 can not simultaneously electric, thus effectively ensure that safety, the reliability service of bridge crane air conditioning system.Three phase line L1 of power supply, L2, L3 are respectively by isolating switch QS connecting system.Bridge crane air conditioning system is by earth terminal PE reliable ground.
When the phase sequence of power supply is normal, namely when three phase line L1 of power supply, L2, L3 are input as positive phase sequence ABC, BCA, CBA, phase sequence relay PR leading-out terminal 11 and phase sequence relay PR leading-out terminal 14 are connected, the coil of contactor KM1 obtains electric, the main contacts of often opening of contactor KM1 is connected, input R, S, T of bridge crane air conditioning system power supply and three phase line L1 of power supply, that L2, L3 input phase sequence is identical, and be positive phase sequence, therefore bridge crane air conditioning rotates forward.
When the phase sequence of power supply is abnormal, namely when three phase line L1 of power supply, L2, L3 are input as negative-phase sequence CBA, BAC, ACB, phase sequence relay PR leading-out terminal 11 and phase sequence relay PR leading-out terminal 12 are connected, the coil of contactor KM2 obtains electric, the main contacts of often opening of contactor KM2 is connected, input R, S, T of bridge crane air conditioning system power supply and three phase line L1 of power supply, that L2, L3 input phase sequence is contrary, and be positive phase sequence, therefore bridge crane air conditioning rotates forward.
When power phase shortage (disconnected phase), contactor KM1 often leaves often opening main contacts and can not connecting of main contacts and contactor KM2, and bridge crane air conditioning does not start.Therefore default-phase protection function is achieved.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. a bridge crane air conditioning entangles mutually and phase-lacking protective device automatically, comprise contactor KM1, contactor KM2 and phase sequence relay PR, it is characterized in that: power end 1a, 3a, 5a of often opening main contacts of described contactor KM1 are connected with three phase line L1, L2, L3 of power supply respectively, load end 2a, 4a, 6a of often opening main contacts of contactor KM1 connect with input R, the S of bridge crane air conditioning system power supply, T-phase respectively; Power end 1b, 3b, 5b of often opening main contacts of described contactor KM2 are connected with three phase line L1, L2, L3 of power supply respectively, and load end 6b, 4b, 2b of often opening main contacts of contactor KM2 connect with input R, the S of bridge crane air conditioning system power supply, T-phase respectively; Phase sequence relay PR end of incoming cables is connected with three phase line L1, L2, L3 of power supply respectively, phase sequence relay PR leading-out terminal 11 is connected with the phase line L3 of power supply, phase sequence relay PR leading-out terminal 12 is held with the coil B1 of contactor KM2 and is connected, the coil B2 end of contactor KM2 is held with the 11a of the normally closed auxiliary contact of contactor KM1 and is connected, phase sequence relay PR leading-out terminal 14 is connected with loop A 1 end of contactor KM1, and loop A 2 end of contactor KM1 is held with the 11b of the normally closed auxiliary contact of contactor KM2 and is connected; The 12b end of the normally closed auxiliary contact of contactor KM2 is held with the c1 of the normally opened contact of auxiliary relay KA respectively with the 12a end of the normally closed auxiliary contact of contactor KM1 and is connected, the c2 end of the normally opened contact of auxiliary relay KA is held with the coil C2 of auxiliary relay KA respectively and is connected with the phase line L1 of power supply, and the coil C1 end of auxiliary relay KA is connected with the phase line L2 of power supply.
2. bridge crane air conditioning according to claim 1 entangles mutually and phase-lacking protective device automatically, it is characterized in that: three phase line L1 of described power supply, L2, L3 are respectively by isolating switch QS connecting system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520849600.5U CN205141656U (en) | 2015-10-29 | 2015-10-29 | Automatic congruence that entangles of bridge crane air conditioner lacks looks protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520849600.5U CN205141656U (en) | 2015-10-29 | 2015-10-29 | Automatic congruence that entangles of bridge crane air conditioner lacks looks protection device |
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| CN205141656U true CN205141656U (en) | 2016-04-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932927A (en) * | 2016-06-22 | 2016-09-07 | 中国人民解放军95989部队 | Automatic control device for AC power phase sequence of air compressor |
| CN111384711A (en) * | 2018-12-28 | 2020-07-07 | 江苏万帮德和新能源科技股份有限公司 | Phase-dislocation protection device based on charging pile system and use method thereof |
-
2015
- 2015-10-29 CN CN201520849600.5U patent/CN205141656U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932927A (en) * | 2016-06-22 | 2016-09-07 | 中国人民解放军95989部队 | Automatic control device for AC power phase sequence of air compressor |
| CN111384711A (en) * | 2018-12-28 | 2020-07-07 | 江苏万帮德和新能源科技股份有限公司 | Phase-dislocation protection device based on charging pile system and use method thereof |
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