CN202400742U - Crane hook sliding-proof device - Google Patents
Crane hook sliding-proof device Download PDFInfo
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- CN202400742U CN202400742U CN2012200102181U CN201220010218U CN202400742U CN 202400742 U CN202400742 U CN 202400742U CN 2012200102181 U CN2012200102181 U CN 2012200102181U CN 201220010218 U CN201220010218 U CN 201220010218U CN 202400742 U CN202400742 U CN 202400742U
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- drg
- electric brake
- contactless switch
- intermediate relay
- crane
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Abstract
The utility model relates to the technical field of protective devices for lifting systems, disclosing a crane hook sliding-proof device. The crane hook sliding-proof device comprises a programmable controller, an intermediate relay, an electric brake contactor and a brake, wherein the intermediate relay comprises a first intermediate relay and a second intermediate relay; and the electric brake contactor comprises a first electric brake contactor and a second electric brake contactor. According to the crane hook sliding-proof device, a plurality of intermediate relays are connected in parallel; a main return circuit of the brake is provided with the two contactors which are connected in series, the two intermediate relays connected in parallel are used for controlling the two contactors which are connected in series with the main return circuit, and each point from the return circuit of the programmable controller possibly having problems can be doubly guaranteed, so that the misoperation of the brake caused by faults of elements is prevented, and safety accidents caused by hook sliding of cranes are prevented. The crane hook sliding-proof device has a simple structure, low manufacture cost and good use effect and is easy to popularize and apply.
Description
Technical field
The utility model relates to hoisting system fender guard technical field, is mainly used in the lifting mechanism of hoisting crane.
Background technology
It is that Wuhan Iron and Steel Plant is made steel the lifting mechanism of 11 casting crane in bridge type that four subsidiary factories produce and divided two kinds of forms that all crane in bridge type of Wuhan Iron and Steel Plant steel-making head factory four subsidiary factories all adopt the Taiyuan heavy industry; Promptly the lifting mechanism of 5 350-80T casting crane in bridge type is with Siemens's stator voltage controlling control, and it is frequency control that all the other 6 crane in bridge type all adopt Siemens 6SE70.Operational process is following: promptly when frequency conversion and pressure regulation are received the rising that PLC sends or descended instruction; Regulator and converter plant are given the PLC entrance point through sending operating instruction after the calculating in several seconds at once; PLC exports an output point after receiving input information; This output point drives relaying, the direct control brake contactless switch operation of relaying (opening and closing action).
On June 18th, 2009, No. 1 350-80T driving driver that makes steel behind the four subsidiary factory's stoves molten steel jar of slinging when the driver resets to zero-bit to controller, caught sight of the molten steel jar and is gliding, and safety misadventure easily happens suddenly.Through field analysis, danger accident event immediate cause is: the normally closed auxiliary point corrosion of the interlocking in the control loop is broken off, and makes the drive motor dead electricity that hoists; The electric control system design defect; It is because the adhesion of braking contactor jam makes braking contactor major loop contact fail in time to break off that drg is failed automatic band-type brake, causes main hook to glide; The safety misadventure if this happens suddenly together, can cause influences the Wuhan Iron and Steel Plant STEELMAKING PRODUCTION greatly.There is deep lesson in other steel mill of this respect.7: 53 on the 18th April in 2007, special steel Co., Ltd workshop steel ladle tenesmus out of control in Qinghe, Tieling, Liaoning Province causes dead six people of 32 people severely injured, 8,660,000 yuan of direct economic losses.
The utility model content
The utility model technical matters to be solved provides a kind of crane gliding-proof hook device; It has the subsequent use intermediate relay of employing and carries out parallelly connected setting with main intermediate relay; And control through Programmable Logic Controller; Series connected two contactless switchs are set on the major loop of drg, and series connected two contactless switchs of intermediate relay control major loop by two parallel connections make to begin from the Programmable Logic Controller loop; Each point that possibly go wrong all has the two-fold guarantee, thereby prevents to cause the characteristics of drg misoperation because of element breaks down.
For solving the problems of the technologies described above; The utility model provides a kind of crane gliding-proof hook device, comprising: Programmable Logic Controller, drg, drg hand switch, first intermediate relay, second intermediate relay, the first electric brake contactless switch, the second electric brake contactless switch;
The mouth of said Programmable Logic Controller is connected with said first, second intermediate relay respectively;
Said drg is connected with the lifting mechanism of hoisting crane;
The said first electric brake contactless switch is connected with first intermediate relay; The said second electric brake contactless switch is connected with second intermediate relay, and the major loop of the first electric brake contactless switch is connected with the major loop of the second electric brake contactless switch, and the second electric brake contactless switch is connected with drg.
It is also to comprise that above-mentioned basic design is carried out improved technical scheme: timer, annunciator;
The normally closed contact of the said first electric brake contactless switch inserts said Programmable Logic Controller with after the normally closed contact of the second electric brake contactless switch is connected;
Said Programmable Logic Controller is connected with said timer, annunciator respectively.
Above-mentioned improvement project is carried out optimized technical scheme does, the time that said timer is set is 2.2 seconds～2.7 seconds.
The technical scheme that is more preferably is that the time that said timer is set is 2.2 seconds.
Further optimized technical scheme is that said drg comprises: first drg, second drg, the 3rd drg and the 4th drg; Said first, second, third, fourth drg is controlled through the said second electric brake contactless switch side by side.
The beneficial effect of the utility model is:
1. the utility model adopts subsequent use intermediate relay to carry out parallelly connected setting with main intermediate relay; And control through Programmable Logic Controller; Series connected two contactless switchs are set on the major loop of drg; Series connected two contactless switchs of intermediate relay control major loop by two parallel connections make to begin from the Programmable Logic Controller output loop that each point that possibly go wrong all has the two-fold guarantee; Can not break down and cause the drg misoperation, can not cause the drg misoperation in the time of just can preventing contactless switch generation jam or adhesion yet because of an element; Have only when two identical original papers all break down and just possibly cause the drg misoperation, and from probability will, the probability that two similar elements break down simultaneously is approximately zero.The rear brake akinesia an immediately because element breaks down could continue after must repairing to use, and does not know to damage the situation that causes fault again up to next element so also a component wear can not occur.
2. insert Programmable Logic Controller through normally closed contact,, timer and annunciator are set with the monitoring brakeage with first, second electric brake contactless switch; When any contactless switch et out of order; Drg stops action, and the Controlled by Programmable Controller timer picks up counting, and controls annunciator afterwards and sends warning; Inform craneman's contactless switch et out of order, thereby make contactless switch in time repaired.
3. economic benefit:
On the basis that site observation analysis verification is examined repeatedly, through technological demonstration, under the prerequisite that does not influence production; Modification scheme to proposing is implemented; In implementation process, this project is in scheme～design～construction all the time and all is in the benign cycle slave mode, and improved 350-80T ladle carne is behind place in operation; Obtained favorable economic benefit, its effect is obvious.
3.1 direct benefit:
In producing on October 29th, 2009; Acceptance is striden the 2#350-80T crane in bridge type when slinging stove HiB molten steel examination lock, and the alarm bell sound rises suddenly, and the driver presses anxious stopping (also not having nothing to do even do not clap anxious stopping) rapidly; And notify section chief on duty, the service personnel inspection finds it has been the braking contactor adhesion.Because the excessive car of the height not high (having only 1.5 meters) that hoists during the examination lock down below; If adopt prior lifting mechanism; Stop also having little time even clap suddenly; And after having adopted the crane gliding-proof hook device that the utility model provides, the molten steel jar is not glided, avoided the generation of grave accident together.Kept a stove HiB steel, according to 200 tons on every stove molten steel, 900,000 yuan of cost prices are directly retrieved about 2,900,000 yuan economic loss.Add and keep a following excessive car of molten steel by 1,000,000 yuan of calculating.Retrieve 3,900,000 yuan economic loss altogether.
3.2 indirect benefit:
Reduced the maintenance frequency, the molten steel jar falls to pound and hurts sb.'s feelings or damage mechanical equipment in the molten steel jar process of can effectively preventing to sling, and has improved the safety factor of cage, has avoided the generation of serious accident, and its indirect economic effect is inestimable.
3.3 what ensure safety in production carries out smoothly.
The utility model adopts subsequent use intermediate relay to carry out parallelly connected setting with main intermediate relay; And control through Programmable Logic Controller; Series connected two contactless switchs are set on the major loop of drg; Series connected two contactless switchs of intermediate relay control major loop by two parallel connections make to begin from the Programmable Logic Controller loop that each point that possibly go wrong all has the two-fold guarantee; Thereby prevent to cause the drg misoperation, avoid causing safety misadventure because of hoisting crane slide hook because of element breaks down.The utility model can be applicable on the crane in bridge type of mechanisms such as the variable voltage control, frequency control of metallurgy industry Controlled by Programmable Controller, and simple in structure, cost of manufacture is low, and result of use is good, is easy to apply.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
The specific embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined utility model purpose is taked; Below in conjunction with accompanying drawing and preferred embodiment, the specific embodiment and the principle of work of the crane gliding-proof hook device that proposes according to the utility model is elaborated.
Wuhan Iron and Steel Plant is made steel five 350-80T ladle carnes of four subsidiary factories and is by the design of Taiyuan heavy industry and makes, and adopts the control of Siemens PLC C and distant station thereof.Master file is concentrated with two the 900KW6SG70 stator voltage controllings principal and subordinate of Siemens Company and is dragged two 500KW wound AC machine operations side by side.When the driver operation master file rises; The drg logic begins computing in the stator voltage controlling device; The inner drg control of device relaying is closed when electric current reaches certain value; Cooresponding open contact among the PLC is closed, and PLC gets electric output through computing with cooresponding output point Q7.0 (main hoist brake control output) coil.It is closed that external actuators control repeating coil gets electric auxiliary open contact, again the braking contactor coil got electric major loop closure and make drg get electric opening, the master file operation of could rising.Otherwise operation descends.The accident that background technology part is introduced has been exactly the braking contactor jam adhesion of driver operation last link when stopping, and makes braking contactor major loop contact fail in time to break off, and causes main hook to glide.
Crane gliding-proof hook device as shown in Figure 2, that the utility model provided comprises: Programmable Logic Controller, intermediate relay, electric brake contactless switch and drg.
In the speed regulation device drg logic error, drg contacts of contactor stickingly join, the sticking brake signal mistake that causes that joins of drg intermediate relay; This device is provided with a plurality of intermediate relays and a plurality of electric brake contactless switch: adopt first intermediate relay and second intermediate relay; Controlled by Programmable Controller is all passed through in two intermediate relay parallel operations; The serial connection first electric brake contactless switch and the second electric brake contactless switch on the major loop of drg, series connected two contactless switchs of intermediate relay control major loop of two parallel connections.
Through above-mentioned improvement, the utility model can begin from whole PLC loop, and each point that possibly go wrong all has the two-fold guarantee, can not cause the drg misoperation because of the fault of an element.Have only when two similar elements all break down and just possibly cause the misoperation of drg, and say from probability, the probability that two similar elements break down simultaneously can myopia be zero.The rear brake akinesia an immediately because element breaks down could continue after must repairing to use, and does not know to damage the situation that causes fault again up to next element so also a component wear can not occur.
The quantity of drg is provided with according to the size of lifting mechanism, and the drg that has adopted in the present embodiment comprises: first drg, second drg, the 3rd drg and the 4th drg.First, second, third, fourth drg is controlled through the second electric brake contactless switch side by side.
Although the probability myopia through above-mentioned improvement hoisting crane " slide hook " is zero, but the possibility of " slide hook " is arranged.Therefore, we have designed the Best Times alarm mechanism again.
At first; Lay KVVRP2 * 1.5 cables; One of cable is terminated on the normally closed node of normally closed contact and the second electric brake contactless switch of the first electric brake contactless switch (let two normally closed electricity series connection), the other end feeds back its called after master hoist brake to Programmable Logic Controller.Monitor brakeage with it.Then, set up timer and annunciator.Programmable Logic Controller is connected with the regulating mechanism of the lifting motor of hoist roller; Set best time of fire alarming in the timer, can be set to 2.2 seconds～2.7 seconds, preferred, be set to 2.2 seconds; Programmable Logic Controller is connected respectively with frequency converter, timer.When Programmable Logic Controller was judged electric brake contactless switch et out of order, the control alarm bell was reported to the police, and the notice service personnel in time keeps in repair the electric brake contactless switch.
For annunciator, can select like alarm bell.Because the maintainer arrives maintenance position and possibly need the long period; Inform maintainer's on-call maintenance for alarm bell can accurately be reported to the police, and don't bring noise to site environment, in the present embodiment as for letting alarm bell report to the police for a long time; In Programmable Logic Controller, be provided with the time that alarm bell is reported to the police; When time is up, Programmable Logic Controller is just controlled alarm bell and is resetted, and stops to report to the police.
After having adopted warning device; The principle of work of the utility model is: when signal that the normally closed contact of normally closed contact and the second electric brake contactless switch of Programmable Logic Controller through the first electric brake contactless switch is sent; Can know whether brake status is normal; When detecting drg electric brake contactless switch and all open, expression is normal, the frequency converter supply regular power;
When zero-bit is got back in driver's shut-down operation; Programmable Logic Controller detects drg electric brake contactless switch, and any one is not opened; Be braking contactor when being in jam or adhesion situation, the Controlled by Programmable Controller timer picks up counting, and what set in the timer is the warning Best Times.Afterwards, PLC produces drg adhesion fault signal, and the control alarm equipment alarm waits for that the maintainer eliminates fault.Other mechanism (cart, dolly, pair hoist) is normal to be moved and do not influence.Auxiliary hoisting mechanism is also transformed like this.
It should be noted last that; The above specific embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although with reference to instance the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model; And not breaking away from the spirit and the scope of the utility model technical scheme, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (5)
1. a crane gliding-proof hook device is characterized in that, comprising: Programmable Logic Controller, drg, drg hand switch, first intermediate relay, second intermediate relay, the first electric brake contactless switch, the second electric brake contactless switch;
The mouth of said Programmable Logic Controller is connected with said first, second intermediate relay respectively;
Said drg is connected with the lifting mechanism of hoisting crane;
The said first electric brake contactless switch is connected with first intermediate relay; The said second electric brake contactless switch is connected with second intermediate relay, and the major loop of the first electric brake contactless switch is connected with the major loop of the second electric brake contactless switch, and the second electric brake contactless switch is connected with drg.
2. crane gliding-proof hook device as claimed in claim 1 is characterized in that, also comprises: timer, annunciator;
The normally closed contact of the said first electric brake contactless switch inserts said Programmable Logic Controller with after the normally closed contact of the second electric brake contactless switch is connected;
Said Programmable Logic Controller is connected with said timer, annunciator respectively.
3. crane gliding-proof hook device as claimed in claim 2 is characterized in that, the time that said timer is set is 2.2 seconds ~ 2.7 seconds.
4. crane gliding-proof hook device as claimed in claim 3 is characterized in that, the time that said timer is set is 2.2 seconds.
5. like any described crane gliding-proof hook device in the claim 1 to 4, it is characterized in that said drg comprises: first drg, second drg, the 3rd drg and the 4th drg; Said first, second, third, fourth drg is controlled through the said second electric brake contactless switch side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200102181U CN202400742U (en) | 2012-01-11 | 2012-01-11 | Crane hook sliding-proof device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200102181U CN202400742U (en) | 2012-01-11 | 2012-01-11 | Crane hook sliding-proof device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202400742U true CN202400742U (en) | 2012-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200102181U Expired - Fee Related CN202400742U (en) | 2012-01-11 | 2012-01-11 | Crane hook sliding-proof device |
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| Country | Link |
|---|---|
| CN (1) | CN202400742U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217474A (en) * | 2015-10-26 | 2016-01-06 | 武汉钢铁(集团)公司 | A kind of crane in bridge type that prevents slips the intelligent monitor system of hook and method |
| CN108569625A (en) * | 2018-04-26 | 2018-09-25 | 泰富国际工程有限公司 | A kind of safety protection circuit device of erecting equipment brake |
| CN113848856A (en) * | 2021-09-29 | 2021-12-28 | 马鞍山钢铁股份有限公司 | Crane electrical control simulation experiment platform and experiment method thereof |
-
2012
- 2012-01-11 CN CN2012200102181U patent/CN202400742U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217474A (en) * | 2015-10-26 | 2016-01-06 | 武汉钢铁(集团)公司 | A kind of crane in bridge type that prevents slips the intelligent monitor system of hook and method |
| CN108569625A (en) * | 2018-04-26 | 2018-09-25 | 泰富国际工程有限公司 | A kind of safety protection circuit device of erecting equipment brake |
| CN113848856A (en) * | 2021-09-29 | 2021-12-28 | 马鞍山钢铁股份有限公司 | Crane electrical control simulation experiment platform and experiment method thereof |
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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: 20120829 Termination date: 20190111 |