CN201567181U - Crane hoisting brake system control protector - Google Patents
Crane hoisting brake system control protector Download PDFInfo
- Publication number
- CN201567181U CN201567181U CN2009202891024U CN200920289102U CN201567181U CN 201567181 U CN201567181 U CN 201567181U CN 2009202891024 U CN2009202891024 U CN 2009202891024U CN 200920289102 U CN200920289102 U CN 200920289102U CN 201567181 U CN201567181 U CN 201567181U
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- brake
- crane
- plc
- brake system
- control
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- Expired - Fee Related
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Abstract
The utility model discloses a crane hoisting brake system control protector comprising a PLC controlling a crane hoisting brake system, a stator pressure regulating main device controlled by the PLC, electric brake contactors and relays controlling the electric brake contactor, as well as comprising a stator pressure regulating secondary device controlled by the PLC, wherein in the crane hoisting brake system, a feedback input end of a crane hoisting brake, one output ends of the stator pressure regulating main device and the stator pressure regulating secondary device are all connected with the input end of the PLC; the number of the relays and the number of the electric brake contactors are respectively two according to arrangement; and the two relays are connected in parallel, the two electric brake contactors are connected in series, the two relays are both connected with the output end of the PLC and each relay is connected with each electric brake contactor. The control protector can reduce the failure possibly appearing during the brake contracting process of the crane hoisting brake, increase the reliability of timely brake contracting in failure state, prevent hook-sliding of a crane hoisting to cause the accidents of splashing steel and injuring people and provide safety guarantee for the crane operation in actual production.
Description
Technical field
The utility model relates to the crane for steelworks use field of security guarantee, particularly relates to a kind of crane elevator brake system control fender guard.
Background technology
The fault of crane elevator slide hook hangs on the very general of generation at each metallurgy, the major accident that sprinkles steel happens occasionally, because the particularity, the particularly operation of liquid metal crane of crane operation, often cause the dead group of group to hinder in case the hook that occurs slipping sprinkles steel, consequence is very serious.Referring to illustrated in figures 1 and 2, the safety guard-safeguard of crane elevator brake system is controlled by PLC at present, just control brake device relaying output when 4 conditions possess simultaneously below the PLC analysis and judgement: condition 1, delaying time of controller 4 seconds; Condition 2, device run signal are sent; Condition 3, plant failure signal send; Condition 4, stator voltage controlling master device control signal send.When above-mentioned 4 conditions possessed simultaneously, drg was controlled relaying output, control electric brake contactless switch, and electric brake is just opened a sluice gate during energising for the outage normally off, opens a sluice gate just may take place under the state crane elevator slide hook accident.Safe and reliable not enough in view of present crane elevator brake system, how to avoid crane elevator slide hook to cause sprinkling the steel casualty accident, becoming the technical barrier that the crane for steelworks use field of security guarantee needs to be resolved hurrily for crane operation in the actual production provides safety control.
The utility model content
The purpose of this utility model is in order to overcome the deficiency of above-mentioned background technology, a kind of crane elevator brake system control fender guard that can avoid crane elevator slide hook to cause sprinkling the steel casualty accident to be provided.
The crane elevator brake system control fender guard that the utility model provides; the programmable logic controller (PLC) PLC that comprises control crane elevator brake system; stator voltage controlling master device by PLC control; the relay of electric brake contactless switch and control electric brake contactless switch; comprise that also the stator voltage controlling of being controlled by PLC is from device; the feedback input end of the crane hoist brake in the crane elevator brake system; the output control terminal of stator voltage controlling master device; stator voltage controlling all links to each other with the input end of PLC from the output control terminal of device; described relay; the electric brake contactless switch respectively is provided with 2; 2 relays are connected in parallel; 2 electric brake contactless switchs are connected in series; 2 relays all link to each other with the mouth of PLC, and each relay respectively connects an electric brake contactless switch.
In technique scheme, the mouth of described PLC also is connected with annunciator.
In technique scheme, the feedback output end of described 2 electric brake contactless switchs all links to each other with the input end of PLC; In described 2 electric brake contactless switchs one links to each other with the crane hoist brake, and another master cock with control crane hoist brake links to each other.
In technique scheme, described crane hoist brake is connected in parallel, and is provided with even number, is generally 2 or 4, sets according to actual needs.
Device parameter and PLC program to each crane are analyzed, find crane occur slipping most reasons of hook be fault state low-converter in time band-type brake cause, in order to guarantee that the crane hoist brake can be realized band-type brake timely and effectively under the faulty condition, the utility model is optimized the part time delay module in the PLC program, and the normal band-type brake of the controller time is revised as 2S by original 4S; With the malfunction shutdown output signal direct control band-type brake output of frequency converter, cut down the number of intermediate links simultaneously, guaranteed the normal band-type brake of faulty condition.In order to reduce the fault rate of crane hoist brake control system, increase the safety factor of crane hoist brake control, analyze at PLC point scaling loss, relay jam or the problems such as adhesion, electric brake contactless switch jam or adhesion that may occur, think the generation that under the situation that suitably increases control element, can reduce above fault to a great extent.The utility model has increased a band-type brake output point in PLC, the relay that this band-type brake output point control increases, and this relay is controlled the electric brake contactless switch of increase again.Wherein two relay parallel connections, two contactless switch series connection.The control system of crane hoist brake has just had two cover control loops like this, wherein one the road breaks down and can not influence its normal operation.And by probability calculation, the probability that two identical components and parts break down simultaneously can be considered zero.Simultaneously, all remain intact at any time in order to guarantee two-way control, we have formulated the practicable inspection scheme of a cover, at any time the problem that may occur are checked.And the element of two control loops done a cover monitored control system, in case fault has appearred in certain element, information just can be made caution immediately in the touch-screen of driver's cab and electric bell.
In sum, compared with prior art, advantage of the present utility model is: the utility model can reduce the fault that may occur in the crane hoist brake band-type brake process and increase the crane hoist brake nonserviceables and realizes the reliability of timely band-type brake, causes sprinkling the steel casualty accident, provides safety control for crane operation in the actual production thereby avoid the crane elevator to slip hook.
Description of drawings
Fig. 1 is the functional block diagram of prior art control loop;
Fig. 2 is the functional block diagram of prior art power loop;
Fig. 3 is a structural representation of the present utility model;
Fig. 4 is the functional block diagram of the utility model control loop.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail, but this embodiment should not be construed as restriction of the present utility model.
Referring to shown in Figure 3; the crane elevator brake system control fender guard that the utility model provides; the programmable logic controller (PLC) PLC that comprises control crane elevator brake system; stator voltage controlling master device by PLC control; stator voltage controlling is from device; electric brake contactless switch 1; electric brake contactless switch 2; annunciator and control electric brake contactless switch 1 respectively; 2 relay 1 and relay 2; the feedback input end of the crane hoist brake in the crane elevator brake system; the output control terminal of stator voltage controlling master device; stator voltage controlling all links to each other with the input end of PLC from the output control terminal of device; relay 1 and relay 2 parallel connections; all link to each other with the mouth of PLC; relay 1 links to each other with electric brake contactless switch 1; relay 2 links to each other with electric brake contactless switch 2, and each relay is respectively controlled an electric brake contactless switch.Electric brake contactless switch 1,2 series connection of electric brake contactless switch, the feedback output end of electric brake contactless switch 1, electric brake contactless switch 2 all links to each other with the input end of PLC, the output of control crane hoist brake.Electric brake contactless switch 2 and 4 (also can be 2, decide according to actual needs, be generally even number) crane hoist brake in parallel links to each other, and electric brake contactless switch 1 links to each other with the master cock of control crane hoist brake.Annunciator links to each other with the mouth of PLC.
Principle of work of the present utility model is as follows:
Avoiding occurring the crane elevator slips the fault key of hook and is that drg can realize band-type brake timely and effectively, in order to solve the crane faulty condition difficult problem of band-type brake timely and effectively, device parameter and PLC program to each crane are analyzed, find crane occur slipping most reasons of hook be fault state low-converter in time band-type brake cause.In order to guarantee that drg can be realized band-type brake timely and effectively under the faulty condition.The utility model is optimized the part time delay module in the PLC program, and the normal band-type brake of the controller time is revised as 2S by original 4S.Referring to shown in Figure 4, just control brake device relaying output when 5 conditions possess simultaneously below the PLC analysis and judgement: condition 1, delaying time of controller 2 seconds; Condition 2, device run signal are sent; Condition 3, plant failure signal send; Condition 4, stator voltage controlling master device control signal send; Condition 5, stator voltage controlling send from the device control signal.With the malfunction shutdown output signal direct control band-type brake output of frequency converter, cut down the number of intermediate links simultaneously, guaranteed the normal band-type brake of faulty condition.
In order to reduce the fault rate of hoist brake control system, increase the safety factor of drg control, analyze at PLC point scaling loss, relay jam or the problems such as adhesion, lock contactless switch jam or adhesion that may occur, the result thinks the generation that can reduce above fault under the situation that suitably increases control element to a great extent.In the PLC program, output signal is two points, and the fault feedback point in stator voltage controlling also is taken as two.Relay 1 is provided by different PLC signal locations respectively with relay 2.The utility model has increased a band-type brake output point in PLC, the relay that this band-type brake output point control increases, and this relay is controlled the lock contactless switch of increase again.Wherein two relay parallel connections, two contactless switch series connection.The control system of drg has just had two cover control loops like this, wherein one the road breaks down and can not influence its normal operation.And by probability calculation, the probability that two identical components and parts break down simultaneously can be considered zero.For example, the probability of PLC point scaling loss if be decided to be 100,000/, then by after the way that increases output band-type brake point, the probability that two points break down simultaneously is 1/10000000000th, can be considered 0, if the probability of relay and electric brake contactless switch jam or adhesion were ten thousand/, then two relays or two the electric brake contactless switchs probability that occurs jam simultaneously would be 1/100000000th, still can be considered zero.Same, the utility model also is placed on the trouble point of stator voltage controlling device in the program together, has so also stopped this part possibility that may break down basically.
Do not take place in order to control minimum probability of failure, be provided with the fault alarm program among the PLC, can be to the diagnosing malfunction of system hardware, and in time send alerting signal.In the fault alarm program, feedback point (existing condition of electric brake) is compared with PLC output point state.If existing condition is inconsistent with output state within a certain period of time, then faults such as adhesion or jam have appearred in the decidable lock, have so just triggered alerting signal.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
The content that is not described in detail in this specification sheets belongs to this area professional and technical personnel's known prior art.
Claims (7)
1. a crane elevator brake system is controlled fender guard; the programmable logic controller (PLC) PLC that comprises control crane elevator brake system; stator voltage controlling master device by PLC control; the relay of electric brake contactless switch and control electric brake contactless switch; it is characterized in that: comprise that also the stator voltage controlling of being controlled by PLC is from device; the feedback input end of the crane hoist brake in the crane elevator brake system; the output control terminal of stator voltage controlling master device; stator voltage controlling all links to each other with the input end of PLC from the output control terminal of device; described relay; the electric brake contactless switch respectively is provided with 2; 2 relays are connected in parallel; 2 electric brake contactless switchs are connected in series; 2 relays all link to each other with the mouth of PLC, and each relay respectively connects an electric brake contactless switch.
2. crane elevator brake system control fender guard as claimed in claim 1, it is characterized in that: the mouth of described PLC also is connected with annunciator.
3. crane elevator brake system control fender guard as claimed in claim 1, it is characterized in that: the feedback output end of described 2 electric brake contactless switchs all links to each other with the input end of PLC.
4. crane elevator brake system as claimed in claim 1 control fender guard is characterized in that: in described 2 electric brake contactless switchs one links to each other with the crane hoist brake, and another links to each other with master cock of controlling the crane hoist brake.
5. crane elevator brake system control fender guard as claimed in claim 4, it is characterized in that: described crane hoist brake is provided with even number.
6. crane elevator brake system control fender guard as claimed in claim 5, it is characterized in that: described crane hoist brake is provided with 2 or 4.
7. crane elevator brake system control fender guard as claimed in claim 5, it is characterized in that: described crane hoist brake is connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202891024U CN201567181U (en) | 2009-12-10 | 2009-12-10 | Crane hoisting brake system control protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202891024U CN201567181U (en) | 2009-12-10 | 2009-12-10 | Crane hoisting brake system control protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201567181U true CN201567181U (en) | 2010-09-01 |
Family
ID=42659466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202891024U Expired - Fee Related CN201567181U (en) | 2009-12-10 | 2009-12-10 | Crane hoisting brake system control protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201567181U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111137797A (en) * | 2019-12-31 | 2020-05-12 | 湖南中联重科建筑起重机械有限责任公司 | Tower crane hook slipping fault detection method and system and storage medium |
| CN114852898A (en) * | 2022-03-31 | 2022-08-05 | 三一汽车起重机械有限公司 | Electric hoisting system and control method |
-
2009
- 2009-12-10 CN CN2009202891024U patent/CN201567181U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111137797A (en) * | 2019-12-31 | 2020-05-12 | 湖南中联重科建筑起重机械有限责任公司 | Tower crane hook slipping fault detection method and system and storage medium |
| CN111137797B (en) * | 2019-12-31 | 2021-08-03 | 湖南中联重科建筑起重机械有限责任公司 | Tower crane hook slipping fault detection method and system and storage medium |
| CN114852898A (en) * | 2022-03-31 | 2022-08-05 | 三一汽车起重机械有限公司 | Electric hoisting system and control method |
| CN114852898B (en) * | 2022-03-31 | 2023-08-25 | 三一汽车起重机械有限公司 | Electric hoisting system and control method |
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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 |
Granted publication date: 20100901 Termination date: 20151210 |
|
| EXPY | Termination of patent right or utility model |