CN203359809U - Control circuit for hoisting mechanism and crane - Google Patents
Control circuit for hoisting mechanism and crane Download PDFInfo
- Publication number
- CN203359809U CN203359809U CN 201320439388 CN201320439388U CN203359809U CN 203359809 U CN203359809 U CN 203359809U CN 201320439388 CN201320439388 CN 201320439388 CN 201320439388 U CN201320439388 U CN 201320439388U CN 203359809 U CN203359809 U CN 203359809U
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- control circuit
- limit switch
- branch road
- lifting mechanism
- safe
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Abstract
The utility model relates to a control circuit for a hoisting mechanism and a crane. The control circuit for the hoisting mechanism comprises a stop control branch circuit and a high-low speed switching control branch circuit, wherein a safe pre-limiting switch is connected in series onto the high-low speed switching control branch circuit, and is connected in parallel with a normally-opened auxiliary contact of a descending contactor; a destination safe limit switch is connected in series onto the stop control branch circuit, and is connected in parallel with a normally-closed auxiliary contact of an ascending contactor. The control circuit and the crane have the benefits that based on the original ascending limit and descending limit, a safe pre-limiting link and a destination safe limiting link are additionally arranged, so that the deficiency in the conventional safe limit control strategy is supplemented; the safe pre-limiting switch is utilized to enable a lifting hook to be switched from a high speed to a low speed, so as to avoid the over-hoisting accident caused by overhigh speed of the lifting hook; the destination safe limit switch is utilized to cut off power compulsively, so as to avoid production safety accidents caused by the ascending contactor subjected to adhesion.
Description
Technical field
The utility model relates to a kind of lifting mechanism control circuit and a kind of hoisting crane.
Background technology
At present, the lifting mechanism operated by rotary motion has the rotary stopper switch, when suspension hook arrives, upper and lowerly can automatically cut off the lifting mechanism power supply when spacing, makes lifting motor out of service.
Yet, along with lifting mechanism adopts double-speed motor or adopts frequency conversion to realize that the application of double speed is more and more, during high speed, parking inertia is larger, only have rise and descend two spacing, suspension hook is easily rushed to summit.
Simultaneously, if contactless for hoisting in use, adhesion problems occurs, the upper limit, two limit functions of lower limit are only arranged, still can not effectively disconnect the lifting mechanism power supply, have larger production safety hidden danger.
The utility model content
The purpose of this utility model is to provide a kind of lifting mechanism control circuit and a kind of hoisting crane, the problem of easily rushing to summit in order to solve the lifting mechanism suspension hook.
For achieving the above object, scheme of the present utility model comprises:
A kind of lifting mechanism control circuit, comprise and stop controlling branch road, two-speed switching controls branch road, on described two-speed switching controls branch road, is in series with the Safety Pre limit switch.
In this lifting mechanism control circuit, described Safety Pre limit switch decline contactless switch in parallel often drive secondary contact.
In this lifting mechanism control circuit, described stop controlling on branch road be in series with the terminal safety limit switch.
In this lifting mechanism control circuit, the normally closed auxiliary contact of described terminal safety limit switch contactless for hoisting in parallel.
A kind of hoisting crane, comprise the lifting mechanism control circuit, and described lifting mechanism control circuit comprises and stops controlling branch road, two-speed switching controls branch road, on described two-speed switching controls branch road, is in series with the Safety Pre limit switch.
In this hoisting crane, described Safety Pre limit switch decline contactless switch in parallel often drive secondary contact.
In this hoisting crane, described stop controlling on branch road be in series with the terminal safety limit switch.
In this hoisting crane, the normally closed auxiliary contact of described terminal safety limit switch contactless for hoisting in parallel.
The beneficial effects of the utility model are: the spacing link of Safety Pre and terminal safe spacing link are set in addition on the basis of original lifting position-limit and descending spacing, supplemented the deficiency of existing safe spacing control policy, utilize the Safety Pre limit switch by suspension hook from switching to fast at a slow speed, what prevent that the suspension hook excessive velocities from causing rushes to summit; Utilize terminal safety limit switch force disconnect power supply, prevent from causing work safety accident to occur because contactless for hoisting sticks together.
The accompanying drawing explanation
Fig. 1 is the major loop electrical schematic diagram;
Fig. 2 is the control loop electrical schematic diagram;
Fig. 3 is rotary stopper work schematic diagram (take lifting altitude as 9 meters be example).
In Fig. 2,1 is start-up circuit, and 2 is rotary stopper multiple spot protective circuit, and 3 is positive and negative rotation circuit, and 4 is high low speed change-over circuit; In Fig. 3, M11 is lifting motor, and S95 is rotary limit device, and 1 is terminal safe spacing point, and 2 is rising safe spacing point, and 3 is the Safety Pre limit point, and 4 is decline safe spacing point.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in more detail.
As shown in Figure 1, K11 is the lifting mechanism contactless for hoisting, and K12 is lifting mechanism decline contactless switch, and K13 is contactless switch at a slow speed, and K14 is rapid contactless, wherein K11 and K12 interlocking, and K13 and K14 interlock.
As shown in Figure 3, existing lifting mechanism only is provided with rising safe spacing point, decline safe spacing point, the present embodiment the first embodiment is provided with the Safety Pre limit point near rising safe spacing point bottom, take lifting altitude as 9 meters examples, the height of rising safe spacing point 2 can be made as 8m, the height of Safety Pre limit point 3 can be made as 7m, the height of decline safe spacing point 4 can be made as 1m, the second embodiment is on the basis of the first embodiment, near another terminal safe spacing point position rising safe spacing point top is set, the height of terminal safe spacing point 1 can be made as 9m.
Be illustrated in figure 2 the control part schematic diagram of lifting mechanism, comprise altogether on off controller, master controller, high low speed conv.Wherein on off controller comprises startup control branch road, stop controlling branch road, master controller comprises rising controls branch road, descend and control branch road, two-speed switching controls branch road, high low speed conv comprises controls at a slow speed branch road, control fast branch road, branch road is controlled in braking, this programme the first embodiment is series connection Safety Pre limit switch on two-speed switching controls branch road, Safety Pre limit switch normality is closed, while being triggered, disconnect, and on this safety limit switch the open contact of decline contactless switch in parallel, the second embodiment for stopping controlling series connection terminal safety limit switch on branch road on the basis of the first embodiment, terminal safety limit switch normality is closed, while being triggered, disconnect, and on this terminal safety limit switch the normally closed contact of contactless for hoisting in parallel.Safety Pre limit switch and terminal safety limit switch can adopt the multiple technologies means to realize, can use coder, approach switch, limit switch, can separately install, also can install an inhibiting device with a plurality of limit functions, belong to prior art about how to arrange, do not repeat them here.
The concrete operations flow process of lifting mechanism is as follows:
In Fig. 2, press start button SB2, the total contactless switch K0 coil electricity of start-up circuit 1, the self-locking of K0 open contact, the lifting mechanism energising, press rising button SB3, suspension hook rises at a high speed, when suspension hook arrives the Safety Pre limit point, rotary limit device S95 lifting position-limit normally closed contact S95-2 disconnects, energization delay relay K012 outage in fast change-over circuit 4 at a slow speed, after the time delay of 1.2s, high speed coil K14 outage, motor enters the low cruise state, realize the Safety Pre limit function, in addition, one group of open contact of lifting position-limit normally closed contact S95-2 decline contactless switch in parallel, purpose is shielding lifting position-limit normally closed contact S95-2 in lifting mechanism decline process, make the decline process unaffected, when the suspension hook low cruise when rising safe spacing point, rotary limit device S95 lifting position-limit normally closed contact S95-1 disconnects, contactless for hoisting K11 outage, lifting motor is out of service, if now contactless for hoisting K11 breaks down, problem sticks together, the K11 main contact does not disconnect, lifting motor is still charged, in propradation, if there is no terminal safe spacing function, the safety misadventure such as can cause that suspension hook comes off, but the another kind of embodiment of this programme has added the measure of terminal safe spacing, when suspension hook rises to the terminal limit point, normally closed some S95-3 of rotary limit device S95 terminal safe spacing disconnects, total contactless switch K0 outage, the auxiliary open contact of K0 disconnects, the control loop outage, simultaneously, K0 master's open contact also cuts off the power supply, it is the major loop outage, thereby make the lifting motor outage, out of service, in addition normally closed some S95-3 parallel connection of safe spacing one group of normally closed contact of contactless for hoisting, purpose is the total contactless switch K0 dead electricity caused due to the disconnection of S95-3 normally closed contact in order to avoid when the safe spacing point in lifting mechanism decline process, by this multiple spacing setting to uphill process, eliminated production safety hidden danger, effectively control and prevent that suspension hook from rushing to summit.
In addition, the utility model also comprises hoisting crane, and hoisting crane adopts upper lifting mechanism and lifting mechanism circuit except introducing, and comprises whole features of the lifting mechanism of above-mentioned introduction, and the specific embodiment does not repeat them here.
Claims (8)
1. a lifting mechanism control circuit, comprise and stop controlling branch road, two-speed switching controls branch road, it is characterized in that, on described two-speed switching controls branch road, is in series with the Safety Pre limit switch.
2. a kind of lifting mechanism control circuit according to claim 1, is characterized in that, described Safety Pre limit switch decline contactless switch in parallel often drive secondary contact.
3. a kind of lifting mechanism control circuit according to claim 1, is characterized in that, described stop controlling on branch road be in series with the terminal safety limit switch.
4. a kind of lifting mechanism control circuit according to claim 3, is characterized in that, the normally closed auxiliary contact of described terminal safety limit switch contactless for hoisting in parallel.
5. a hoisting crane, comprise the lifting mechanism control circuit, and described lifting mechanism control circuit comprises and stops controlling branch road, two-speed switching controls branch road, it is characterized in that, on described two-speed switching controls branch road, is in series with the Safety Pre limit switch.
6. a kind of hoisting crane according to claim 5, is characterized in that, described Safety Pre limit switch decline contactless switch in parallel often drive secondary contact.
7. a kind of hoisting crane according to claim 5, is characterized in that, described stop controlling on branch road be in series with the terminal safety limit switch.
8. a kind of hoisting crane according to claim 7, is characterized in that, the normally closed auxiliary contact of described terminal safety limit switch contactless for hoisting in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320439388 CN203359809U (en) | 2013-07-22 | 2013-07-22 | Control circuit for hoisting mechanism and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320439388 CN203359809U (en) | 2013-07-22 | 2013-07-22 | Control circuit for hoisting mechanism and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203359809U true CN203359809U (en) | 2013-12-25 |
Family
ID=49807602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320439388 Expired - Fee Related CN203359809U (en) | 2013-07-22 | 2013-07-22 | Control circuit for hoisting mechanism and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203359809U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106586461A (en) * | 2015-10-16 | 2017-04-26 | 安徽华尔泰化工股份有限公司 | Interlocking control circuit of coal briquette chain plate conveyor |
-
2013
- 2013-07-22 CN CN 201320439388 patent/CN203359809U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106586461A (en) * | 2015-10-16 | 2017-04-26 | 安徽华尔泰化工股份有限公司 | Interlocking control circuit of coal briquette chain plate conveyor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20160722 |