CN206033052U - Hoist hoisting mechanism prevents electrical control circuit that falls - Google Patents
Hoist hoisting mechanism prevents electrical control circuit that falls Download PDFInfo
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- CN206033052U CN206033052U CN201620931171.0U CN201620931171U CN206033052U CN 206033052 U CN206033052 U CN 206033052U CN 201620931171 U CN201620931171 U CN 201620931171U CN 206033052 U CN206033052 U CN 206033052U
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Abstract
The utility model discloses a hoist hoisting mechanism prevents electrical control circuit that falls belongs to hoist electric control technology field, it establishes ties with master controller's K4 contact, braking contactor C's coil in proper order to include by the contactor E's that rises normally open contact E2, decline contactor N's normally open contact N1, braking contactor C's normally open contact C1 after parallelly connected again constitutes brake circuit the controlled switch that establishes ties between brake circuit's master controller LKS's K4 contact, braking contactor C's the coil, when hoisting mechanism rises or descends, this controlled switch switch -on, at the contactor E's that rises coil or when descending contactor N's coil outage, this controlled switch disconnection. The utility model discloses a controlled switch that establishes ties in brake circuit when the circuit breaks down, can in time cut off the power of stopper, makes the stopper be in braking state, when preventing that the circuit from breaking down, and the free falling accident of load.
Description
Technical field
This utility model belongs to crane technical field of electric control, and in particular to a kind of crane hoisting mechanism fall arrest
Electric control circuit.
Background technology
TC type control panel circuits are China's control device for crane circuits widely used on crane at present, this control
As shown in figure 1, wherein, the K1 contacts of master controller LKS are normally-closed contacts to screen circuit, the K5 contacts of master controller LKS, on
The normally-closed contact E5 of catalyst E is risen, declining the coil decline loop in series of catalyst N, the K6 of master controller LKS is tactile
Point, the normally-closed contact N4 of lower liter of catalyst N, the coil of catalyst 4A, the coil riser circuit in series of contactless for hoisting E,
The coils from parallel connection of coils of the normally opened contact E1 and catalyst 4A of contactless for hoisting E, the normally opened contact E2 of contactless for hoisting E, decline contact
The normally opened contact N1 of device N, braking contactor C normally opened contact C1 it is in parallel after K4 contacts again with master controller LKS, braking connect
The coil brake circuit in series of tentaculum C, this control panel circuit adopt 6-0-6 gears, i.e. raising and lowering direction all
There are six grades, first grade is preparation level in descent direction, and second and third shelves is two-stage reversing braking decline, and fourth, fifth, six grades is three
Level regenerative braking declines.The operation of gear is all manual operation, rises or when declining moves master controller to corresponding
Master controller is retracted zero during stopping by gear, and the K4 contacts of master controller LKS disconnect, and cut off the power supply of brake circuit, system
Dynamic device is held tightly, working properly.But the circuit is during raising and lowering, if there is abrasion or circuit in master controller
In coil damage, poor contact of contacts, as brake is in declutching state, may all produce the situation of free falling, this
It is the shortcoming of this control circuit most serious, major industrial accident can be caused.The following is several common events fallen
Barrier：
1st, when line work is when rising the 6th grade, the contactless for hoisting E normally opened contact E1 loose contacts of riser circuit, this
Planting loose contact causes contactless for hoisting to discharge, and riser circuit power-off, motor do not produce electromagnetic torque, as at this moment braking connects
Tentaculum C is to close, and brake will produce the situation of load free falling, may cause major accident in the state that declutches.
If the 2, the contact K6 of master controller LKS；Or when declining the normally-closed contact N4 loose contacts of catalyst N；Or on
Rise catalyst E coils and open circuit fault occur.Raising is unable to if occurring before raising, can be produced if occurring after raising
The serious conditions of load free falling.
When the 3rd, declining the 6th grade, as master controller is using too long, cam heavy wear, the master controller LKS taxes
Contact K2, K5 loose contact, easily causes the serious conditions of load free falling.
When the 4th, declining catalyst N coils and its relevant circuit breaker (loose contact), level conversion is being declined to by force by braking
When degrading under power, decline catalyst not adhesive.As at this moment brake is in the state that declutches, so free falling feelings can be produced
Condition.
The content of the invention
This utility model technical issues that need to address be to provide it is a kind of it is safe and reliable, will not fall because line fault causes
Crane hoisting mechanism fall arrest electric control circuit.
For solving above-mentioned technical problem, the technical scheme adopted by this utility model is：
A kind of crane hoisting mechanism fall arrest electric control circuit, including the normally opened contact E2 by contactless for hoisting E, under
The drop normally opened contact N1 of catalyst N, braking contactor C normally opened contact C1 it is in parallel after K4 contacts again with master controller, system
The coil of dynamic catalyst C is followed in series to form brake circuit, in the K4 contacts of the master controller LKS of the brake circuit, system
Connect between the coil of dynamic catalyst C controlled switch, when lifting mechanism rises or declines, the controlled switch is connected, upper
When rising the coil of catalyst E or declining the coil blackout of catalyst N, the controlled switch disconnects.
Further, the controlled switch is two groups of normally opened contacts being connected in parallel, and rises or declines in lifting mechanism
When, two groups of normally opened contact least one set closures, in the coil blackout of the coil or decline catalyst N of contactless for hoisting E,
The normally opened contact is all off.
Further, normally opened contact of a group in two groups of normally opened contacts of controlled switch for contactless for hoisting E, another
Time delay break contact JS1 of the group for time-delay relay, time delay break contact JS1 are controlled by timing circuit, the timing circuit
Normally opened contact E4 including contactless for hoisting E, the normally opened contact N2 for declining catalyst N, braking contactor C normally opened contact C2 with
And the coil of time-delay relay JS, the normally opened contact E4 of contactless for hoisting E connect with the normally opened contact N2 for declining catalyst N after again
It is in parallel with the normally opened contact C2 of braking contactor C, the then timing circuit in series with the coil of time-delay relay JS.It is described to prolong
When relay setting time be less than 0.3 second.
As a result of above-mentioned technical proposal, the technological progress that this utility model is obtained is：
This utility model, can be cut off when circuit breaks down in time by controlled switch of connecting in brake circuit
The power supply of brake, makes brake in on-position, when preventing circuit from breaking down, loads free falling accident.
Description of the drawings
Fig. 1 is the electrical schematic diagram of prior art；
Fig. 2 is this utility model electrical schematic diagram.
Specific embodiment
This utility model is described in further details with reference to embodiment：
As shown in Fig. 2 the normally opened contact E2 of contactless for hoisting E of the present utility model, the normally opened contact of decline catalyst N
N1, braking contactor C normally opened contact C1 it is in parallel after K4 contacts again with master controller, braking contactor C coil successively
Brake circuit in series, between the K4 contacts of the master controller LKS of the brake circuit, the coil of braking contactor C
Series connection controlled switch, the controlled switch is two groups of normally opened contacts being connected in parallel, and when lifting mechanism rises or declines, this two
Group normally opened contact least one set closure, in the coil blackout of the coil or decline catalyst N of contactless for hoisting E, this is normally opened
Contact is all off.
In order to prevent master controller in gear shift operation, braking contactor C repeats adhesive, and two groups of controlled switch are normally opened
Normally opened contact of a group in contact for contactless for hoisting E, another group of time delay break contact JS1 for time-delay relay, this prolongs
When break contact JS1 be controlled by timing circuit, the timing circuit includes the normally opened contact E4 of contactless for hoisting E, declines contact
The coil of the normally opened contact N2 of device N, the normally opened contact C2 of braking contactor C and time-delay relay JS, contactless for hoisting E's is normal
Open in parallel with the normally opened contact C2 of braking contactor C again, Ran Houyu after contact E4 is connected with the normally opened contact N2 of decline catalyst N
The coil timing circuit in series of time-delay relay JS.During in order to ensure to break down, braking contactor C energy power-off in time,
Prevent tenesmus from slipping hook, the setting time of the time-delay relay is less than 0.3 second.
Principle analysis：
1st, this utility model is in master controller back to zero（Stop）When, the power supply of brake circuit is touched with the K4 of master controller
The disconnection of point and power-off, time-delay relay JS do not play time-lag action, slips hook phenomenon when will not produce master controller back to zero.
2nd, when suspension hook rises, K6, K4 closing of contact of master controller, riser circuit work, the coil of contactless for hoisting E
Electric adhesive is obtained, its normally opened contact E1, E2, E3, E4 closure, because the K4 contacts of normally opened contact E1, E2, E3 and master controller are closed
Close, in brake circuit, brake coil C obtains electric adhesive, brake is opened, its normally opened contact C1, C2's and contactless for hoisting E
Normally opened contact E4 is closed, and makes the coil of time-delay relay JS in brake circuit obtain electric adhesive；The time delay of time-delay relay JS disconnects
Contact JS1 is closed, coil power supply to braking contactor C in parallel with the normally opened contact E3 of contactless for hoisting E.Work as contactless for hoisting
When the coil of E discharges suddenly, normally opened contact E1, E2, E3, E4 of contactless for hoisting E are simultaneously switched off, due to declining in brake circuit
The normally opened contact N2 of catalyst N is not closed, and the normally opened contact E4 of contactless for hoisting E disconnects, the coil coil of time relay JS
Release, causes the time delay break contact JS1 of time relay JS in brake circuit to disconnect after 0.3 second in time delay, now rises and connect
The normally opened contact E3 of tentaculum E is off-state, and the coil blackout of braking contactor C, brake are braked rapidly.
When the 3rd, declining, K5, K4 closure of master controller, the coil for declining catalyst N obtain electric adhesive, its normally opened contact
N1, N2 are closed, and make the coil of time relay JS in brake circuit obtain electric adhesive, move closure, system its time delay break contact JS1 wink
Dynamic loop is connected, the coil adhesive of braking contactor C.When the releasing winding of catalyst N is declined, its normally opened contact N1, N2 break
Open, brake circuit power-off, the releasing winding of time relay JS, its time delay break contact JS1 time delays were disconnected after 0.3 second, braking
Loop disconnects, and the releasing winding of braking contactor C, brake are braked rapidly.
4th, 3,4 gears are being declined, when rising, declining catalyst transition, contactless for hoisting E releases decline catalyst N
Non- adhesive, normally opened contact N1, N2 of normally opened contact E1, E2, E3, E4 and decline catalyst of contactless for hoisting are all off,
But as now the normally opened contact C1 of braking contactor is to close, brake circuit does not disconnect, the coil of time relay JS
Dead electricity, its time delay break contact JS1 need time delay just disconnect for 0.3 second, and the time delay of herein 0.3 second be enough to make gear switch
Come（Decline 4 grades of decline catalyst N connections, its normally opened contact N1, N2 closure）, continue the coil of time relay JS
Electricity, the coil not power-off of braking contactor C, prevents in gearshift procedure, and braking contactor repeats adhesive.
Claims (4)
1. a kind of crane hoisting mechanism fall arrest electric control circuit, including the normally opened contact E2 by contactless for hoisting E, decline
The normally opened contact N1 of catalyst N, braking contactor C normally opened contact C1 it is in parallel after K4 contacts again with master controller, braking
The coil of catalyst C is followed in series to form brake circuit, it is characterised in that：In the master controller LKS of the brake circuit
Connect between K4 contacts, the coil of braking contactor C controlled switch, when lifting mechanism rises or declines, the controlled switch
Connect, in the coil blackout of the coil or decline catalyst N of contactless for hoisting E, the controlled switch disconnects.
2. crane hoisting mechanism fall arrest electric control circuit according to claim 1, it is characterised in that：It is described controlled
Two groups of normally opened contacts for being connected in parallel are switched, when lifting mechanism rises or declines, two groups of normally opened contact least one sets
Closure, in the coil blackout of the coil or decline catalyst N of contactless for hoisting E, the normally opened contact is all off.
3. crane hoisting mechanism fall arrest electric control circuit according to claim 2, it is characterised in that：Controlled switch
Two groups of normally opened contacts in one group of normally opened contact for contactless for hoisting E, another group of time delay for time-delay relay disconnects touches
Point JS1, time delay break contact JS1 are controlled by timing circuit, and the timing circuit includes the normally opened contact of contactless for hoisting E
E4, the normally opened contact N2 for declining catalyst N, the coil of the normally opened contact C2 and time-delay relay JS of braking contactor C, rise
The normally opened contact E4 of catalyst E connect with the normally opened contact N2 for declining catalyst N after normally opened contact C2 again with braking contactor C
Parallel connection, the then timing circuit in series with the coil of time-delay relay JS.
4. crane hoisting mechanism fall arrest electric control circuit according to claim 3, it is characterised in that the time delay
The setting time of relay is less than 0.3 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620931171.0U CN206033052U (en) | 2016-08-24 | 2016-08-24 | Hoist hoisting mechanism prevents electrical control circuit that falls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620931171.0U CN206033052U (en) | 2016-08-24 | 2016-08-24 | Hoist hoisting mechanism prevents electrical control circuit that falls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206033052U true CN206033052U (en) | 2017-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620931171.0U Active CN206033052U (en) | 2016-08-24 | 2016-08-24 | Hoist hoisting mechanism prevents electrical control circuit that falls |
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| Country | Link |
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| CN (1) | CN206033052U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118934A (en) * | 2019-03-08 | 2019-08-13 | 广东省特种设备检测研究院珠海检测院 | A kind of crane motor stator exception loss protecting function validation checking method |
| CN112217422A (en) * | 2020-11-20 | 2021-01-12 | 中船华南船舶机械有限公司 | Control method of multi-motor electric control system |
| CN113017666A (en) * | 2021-02-05 | 2021-06-25 | 明峰医疗系统股份有限公司 | Anti-falling brake circuit of diagnostic bed and CT scanning bed |
-
2016
- 2016-08-24 CN CN201620931171.0U patent/CN206033052U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118934A (en) * | 2019-03-08 | 2019-08-13 | 广东省特种设备检测研究院珠海检测院 | A kind of crane motor stator exception loss protecting function validation checking method |
| CN112217422A (en) * | 2020-11-20 | 2021-01-12 | 中船华南船舶机械有限公司 | Control method of multi-motor electric control system |
| CN112217422B (en) * | 2020-11-20 | 2022-05-17 | 中船华南船舶机械有限公司 | Control method of multi-motor electric control system |
| CN113017666A (en) * | 2021-02-05 | 2021-06-25 | 明峰医疗系统股份有限公司 | Anti-falling brake circuit of diagnostic bed and CT scanning bed |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |