CN202265329U - Super limit protection circuit structure for main hook of travelling crane - Google Patents
Super limit protection circuit structure for main hook of travelling crane Download PDFInfo
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- CN202265329U CN202265329U CN2011202853886U CN201120285388U CN202265329U CN 202265329 U CN202265329 U CN 202265329U CN 2011202853886 U CN2011202853886 U CN 2011202853886U CN 201120285388 U CN201120285388 U CN 201120285388U CN 202265329 U CN202265329 U CN 202265329U
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Abstract
The utility model relates to a super limit protection circuit structure for the main hook of a travelling crane, comprising an alternating-current contactor, wherein the coil end of the alternating-current contactor is serially connected with the normally-closed contacts of an over-current contactor and a stroke switch respectively, serially connected with the normally-closed contacts of corresponding cam controllers in order via the normally-closed contact of a protection alternating-current contactor, and connected with a first normally-open contact via a start button; the first normally-open contact is connected with the third normally-closed contacts of a ninth stroke switch and a trolley cam controller via the second normally-closed contact of a main hook cam controller respectively; the third normally-closed contact of the trolley cam controller is connected with the normally-closed contact of the protection alternating-current contactor via the third normally-closed contacts of a seventh stroke switch and a cart cam controller, a fifth stroke switch and a second normally-open contact; a ninth limit switch is connected with the coil of the protection alternating-current contactor via a super limit switch; and the coil of the protection alternating-current contactor is connected with the coil of the alternating-current contactor. The super limit protection circuit structure for the main hook of a travelling crane disclosed by the utility model enhances the operation reliability of the main hook of a travelling crane.
Description
Technical field
The utility model relates to a kind of protective circuit structure, and the super spacing protective circuit structure of especially a kind of driving main hook belongs to the technical field that the driving main hook is protected.
Background technology
Crane in bridge type is to realize that production process mechanization, automation get important tool and equipment in modern industry production and the lifting transportation.So crane in bridge type is all used in departments such as indoor and outdoor industrial and mining enterprises, steel chemical, railway traffic, port and pier and logistics turnover and place widely.Crane in bridge type comprises driving main hook, dolly and big mechanism of car; At present, the safe handling of crane in bridge type is paid special attention to, and particularly the crane in bridge type main hook is safe in utilization.
Summary of the invention
The purpose of the utility model is to overcome the deficiency that exists in the prior art, provides a kind of driving main hook super spacing protective circuit structure, and it is simple and compact for structure, and is easy to install, has improved driving main hook reliability of operation.
According to the technical scheme that the utility model provides, the super spacing protective circuit structure of said driving main hook comprises AC contactor, and said AC contactor has first open contact and second open contact; Coil one end of said AC contactor is in series with the normally closed contact of the 8th overcurrent relay, the 7th overcurrent relay, the 6th overcurrent relay, the 5th overcurrent relay, the 4th overcurrent relay, the 3rd overcurrent relay, second overcurrent relay, first overcurrent relay, main overcurrent relay, fourth line journey switch, third trip switch, second travel switch and first travel switch respectively, and first travel switch is connected with first normally closed contact of cart cam controller, first normally closed contact of main hook cam controller and first normally closed contact of dolly cam controller through the normally closed contact of protection AC contactor successively; First normally closed contact of said dolly cam controller links to each other with first open contact through start button; Said first open contact links to each other with second normally closed contact of main hook cam controller, and second normally closed contact of main hook cam controller links to each other with second normally closed contact of the 9th travel switch, dolly cam controller and the 3rd normally closed contact of dolly cam controller respectively; The 3rd normally closed contact of said dolly cam controller links to each other with the 3rd normally closed contact of cart cam controller through the 7th travel switch; The 3rd normally closed contact of said cart cam controller links to each other with an end of second open contact through fifth line journey switch, and the other end of said second normally closed contact links to each other corresponding to an end that links to each other with first normally closed contact of cart cam controller with the normally closed contact of protection AC contactor; Second normally closed contact of dolly cam controller links to each other corresponding to an end that links to each other with the 3rd normally closed contact of cart cam controller with the 7th travel switch through the 8th travel switch; The 3rd normally closed contact of cart cam controller links to each other with the 6th travel switch through second normally closed contact of cart cam controller, and said the 6th travel switch links to each other corresponding to an end that links to each other with fifth line journey switch with second open contact corresponding to the other end that links to each other with second normally closed contact of cart cam controller; Said the 9th limit switch links to each other through the coil of ultralimit bit switch with the protection AC contactor, and said protection ac contactor coil links to each other corresponding to the other end that links to each other with the 8th overcurrent relay with ac contactor coil corresponding to the other end that links to each other with the ultralimit bit switch.
Said start button links to each other with first fuse corresponding to an end that links to each other with first open contact; The coil of AC contactor links to each other with second fuse corresponding to the other end that links to each other with the 8th overcurrent relay.
The advantage of the utility model: the upper limit position switch top of the car owner's hook of being expert at is provided with the ultralimit bit switch, and the ultralimit bit switch links to each other with the coil of protection contactless switch, and the normally closed contact of protection contactless switch is serially connected with in the wire loop of AC contactor; After triggering the ultralimit bit switch; Can be through the normally closed contact of protection contactless switch; Make the coil losing electricity of AC contactor, disconnection main hook drive motor is connected with three phase mains, and can avoid driving a vehicle the situation that maloperation causes the main hook high-altitude to be fallen occurs when main hook stops at upper limit; Simple and compact for structure, improved the safety of main hook work.
Description of drawings
Fig. 1 is the schematic circuit diagram of the utility model protective circuit structure.
Description of reference numerals: 1-first open contact; 2-second open contact; 3-second fuse; First normally closed contact of 4-cart cam controller; First normally closed contact of 5-main hook cam controller; First normally closed contact of 6-dolly cam controller; Second normally closed contact of 7-cart cam controller; The 3rd normally closed contact of 8-cart cam controller; Second normally closed contact of 9-dolly cam controller; The 3rd normally closed contact of 10-dolly cam controller; Second normally closed contact of 11-main hook cam controller; 12-first fuse; DJL-master's overcurrent relay; The C-AC contactor; 1JL-first overcurrent relay; 2JL-second overcurrent relay; 3JL-the 3rd overcurrent relay; 4JL-the 4th overcurrent relay; 5JL-the 5th overcurrent relay; 6JL-the 6th overcurrent relay; 7JL-the 7th overcurrent relay; 8JL-the 8th overcurrent relay; KTJ-main hook cam controller; KTX-dolly cam controller; KTD-cart cam controller; R1-first resistance box; R2-second resistance box; R3-the 3rd resistance box; R4-the 4th resistance box; 3RD-the 3rd fuse; 4RD-the 4th fuse; 1AK-first travel switch; 2AK-second travel switch; 3AK-third trip switch; 4AK-fourth line journey switch; 1DXK-fifth line journey switch; 2DXK-the 6th travel switch; 1XXK-the 7th travel switch; 2XXK-the 8th travel switch; ZXK-the 9th travel switch; ZXXK-ultralimit bit switch; The KA-protective relay; DA-foot-operated switch and KB-voltage transformer and DL-electric bell.
The specific embodiment
Below in conjunction with concrete accompanying drawing and embodiment the utility model is described further.
In the main circuit diagram of crane in bridge type running condition, comprise three phase mains.L1, L2 and L3 are respectively the three-phase in the three phase mains; Three phase mains links to each other with AC contactor C through knife-like switch DK; The coil of AC contactor C links to each other with the second cart drive motor with main hook drive motor, trolley drive motor and the first cart drive motor respectively through behind the main overcurrent relay DJL.X1, X2 and X3 are that main overcurrent relay DJL is positioned at X2 and goes up mutually through the three-phase of the three phase mains of exporting behind the knife-like switch DK; AC contactor C is respectively X11, X22 and X31 through the three-phase that produces three phase mains behind the main overcurrent relay DJL.The first overcurrent relay 1JL is installed at the X11 that links to each other with the main hook drive motor on mutually; The second overcurrent relay 2JL is installed at the X31 that links to each other with the main hook drive motor on mutually; X11 phase, X22 reach X31 mutually and link to each other with the main hook drive motor through main hook cam controller KTJ mutually then; The main hook drive motor also links to each other with the contact of main hook cam controller KTJ through the first resistance box R1, and the connection through main hook cam controller KTJ corresponding contacts can realize the rotating of main hook drive motor.Also be provided with the first main hook band-type brake motor and the second main hook band-type brake motor on the main hook drive motor, can guarantee the safe and reliable of main hook drive motor drives main hook when motion through the first main hook band-type brake motor and the second main hook band-type brake motor.
The 3rd overcurrent relay 3JL is installed at the X11 that links to each other with trolley drive motor on mutually; The 4th overcurrent relay 4JL is installed at the X31 that links to each other with trolley drive motor on mutually; X11 phase, X22 reach X31 mutually and link to each other with trolley drive motor through dolly cam controller KTX mutually then; Trolley drive motor also links to each other with the corresponding contact of dolly cam controller KTX through the second resistance box R2, can realize the rotating of trolley drive motor, realizes the different operating requirement.Trolley drive motor is provided with dolly band-type brake motor, can guarantee the safe and reliable of trolley drive motor driving trolley when motion through dolly band-type brake motor.
The cart of crane in bridge type has two drive motor, is respectively the first cart drive motor and the second cart drive motor.X11 phase, X22 reach X31 mutually and communicated and export behind the cart cam controller KTD; And link to each other with the first cart drive motor through the 5th overcurrent relay 5JL, the 6th overcurrent relay 6JL; The first cart drive motor links to each other through the contact with cart cam controller KTD, can realize the rotating of the first cart drive motor; Simultaneously; Link to each other with the second cart drive motor through the 7th overcurrent relay 7JL, the 8th overcurrent relay 8JL; After the second cart drive motor is connected through the corresponding contacts with cart cam controller KTD; The rotating of the second cart drive motor can be realized,, the requirement of cart corresponding sports can be realized through the corresponding matching of a cart drive motor and the second cart drive motor.The first cart drive motor is provided with the first cart band-type brake motor of corresponding matching, and the second cart drive motor is provided with the second cart band-type brake motor of corresponding matching, can guarantee the safe and reliable of cart motion.
As shown in Figure 1: as to be the control circuit schematic diagram of the utility model.Said AC contactor has first open contact 1 and second open contact 2; Coil one end of said AC contactor is in series with the normally closed contact of the 8th overcurrent relay 8JL, the 7th overcurrent relay 7JL, the 6th overcurrent relay 6JL, the 5th overcurrent relay 5JL, the 4th overcurrent relay 4JL, the 3rd overcurrent relay 3JL, the second overcurrent relay 2JL, the first overcurrent relay 1JL, main overcurrent relay DJL, fourth line journey switch 4AK, third trip switch 3AK, the second travel switch 2AK and the first travel switch 1AK respectively, and first normally closed contact 4 of the normally closed contact of the first travel switch 1AK through protection AC contactor KA and cart cam controller, first normally closed contact 5 of main hook cam controller and first normally closed contact 6 of dolly cam controller are connected successively; First normally closed contact 6 of said dolly cam controller links to each other with first open contact 1 through start button QA1; Said first open contact 1 links to each other with second normally closed contact 11 of main hook cam controller, and second normally closed contact 11 of main hook cam controller links to each other with second normally closed contact 9 of the 9th travel switch ZXK, dolly cam controller and the 3rd normally closed contact 10 of dolly cam controller respectively; The 3rd normally closed contact 10 of said dolly cam controller links to each other with the 3rd normally closed contact 8 of cart cam controller through the 7th travel switch 1XXK; The 3rd normally closed contact 8 of said cart cam controller links to each other with an end of second open contact 2 through fifth line journey switch 1DXK, and the other end of said second normally closed contact 2 links to each other corresponding to an end that links to each other with first normally closed contact 4 of cart cam controller with the normally closed contact of protection AC contactor KA; Second normally closed contact 9 of dolly cam controller links to each other corresponding to an end that links to each other with the 3rd normally closed contact 8 of cart cam controller with the 7th travel switch 1XXK through the 8th travel switch 2XXK; The 3rd normally closed contact 8 of cart cam controller links to each other with the 6th travel switch 2DXK through second normally closed contact 7 of cart cam controller, and said the 6th travel switch 2DXK links to each other corresponding to an end that links to each other with fifth line journey switch 1DXK with second open contact 2 corresponding to the other end that links to each other with second normally closed contact 7 of cart cam controller; It is characterized in that: said the 9th limit switch ZXK links to each other with the coil of protection AC contactor KA through ultralimit bit switch ZXXK, and said protection AC contactor KA coil links to each other corresponding to the other end that links to each other with the 8th overcurrent relay 8JL with AC contactor corresponding to the other end that links to each other with ultralimit bit switch ZXXK.The first travel switch 1AK, the second travel switch 2AK, third trip are driven 3AK pass, fourth line journey switch 4AK, fifth line journey switch 1DXK, the 6th travel switch 2DXK, the 7th travel switch 1XXK, the 8th travel switch 2XXK and the 9th travel switch ZXK travel switch for existing crane in bridge type protection, and the installation site of said corresponding travel switch and function are all identical with existing design; Ultralimit bit switch ZXXK is positioned at the upper limit travel switch top of driving main hook; When the upper limit position switch (or travel switch) of driving main hook can not make the stop motion of driving main hook; Can force to break off the power supply of main hook drive motor through protection AC contactor KA and ultralimit bit switch ZXXK, the safe in operation of the main hook of guaranteeing to drive a vehicle.
The 9th travel switch ZXK links to each other with X22, constitutes closed control loop.Said start button QA1 links to each other with first fuse 12 corresponding to an end that links to each other with first open contact 1; The coil of AC contactor C links to each other with second fuse 3 corresponding to the other end that links to each other with the 8th overcurrent relay 8JL; Be connected with corresponding power source bus through first fuse 12 and second fuse 3, constitute the control circuit loop.After start button QA1 closure; Main hook cam controller KTJ, cart cam controller KTD and dolly cam controller KTX are in interposition; All overcurrent relays, travel switch are normal; The coil of AC contactor C is charged, after the coil of AC contactor C is charged, will make first open contact 1 and second open contact, 2 closures of AC contactor C.When the upper limit of driving main hook was inoperative, the main hook drive motor can continue operation, and after main hook drive motor drives main hook triggered ultralimit bit switch ZXXK, ultralimit bit switch ZXXK was closed, made that the coil of protection contactless switch KA is charged; After the coil of protection contactless switch KA is charged; The normally closed contact of protection contactless switch KA breaks off; After the normally closed contact of protection contactless switch KA breaks off; AC contactor C coil and power supply bonded assembly loop are broken off, thus break off main hook drive motor, trolley drive motor, a big cart drive motor and the second cart drive motor and three phase mains be connected the purpose of arrival guard rows car owner hook; Can guarantee the work safety of main hook cam controller KTJ.
As shown in Figure 1: during work, closed knife switch DK and AC contactor C; Closed then start button QA1 makes the coil of AC contactor C charged, first normally closed contact 1 of AC contactor C and second normally closed contact, 2 closures.After first normally closed contact 1 and second normally closed contact, 2 closures, constitute the self-locking circuit conducting of AC contactor C, constitute self-locking with AC contactor.After the conducting of AC contactor C self-locking circuit, the action through corresponding cam controller control cam drive motor, trolley drive motor, the first cart drive motor and the second cart drive motor realizes the work of crane in bridge type.When main hook, dolly and cart moved and trigger corresponding travel switch, the self-locking circuit of AC contactor C broke off, and can realize safe and reliable work; When the upper limit of driving main hook was inoperative, the main hook drive motor can continue operation, and after main hook drive motor drives main hook triggered ultralimit bit switch ZXXK, ultralimit bit switch ZXXK was closed, made that the coil of protection contactless switch KA is charged; After the coil of protection contactless switch KA is charged; The normally closed contact of protection contactless switch KA breaks off; After the normally closed contact of protection contactless switch KA breaks off; AC contactor C coil and power supply bonded assembly loop are broken off, thus break off main hook drive motor, trolley drive motor, a big cart drive motor and the second cart drive motor and three phase mains be connected the purpose of arrival guard rows car owner hook; Can guarantee the work safety of main hook cam controller KTJ.
The be expert at upper limit position switch top of car owner's hook of the utility model is provided with ultralimit bit switch ZXXK, and ultralimit bit switch ZXXK links to each other with the coil of protection contactless switch KA, protects the normally closed contact of contactless switch KA to be serially connected with in the wire loop of AC contactor C; After triggering ultralimit bit switch ZXXK; Can be through the normally closed contact of protection contactless switch KA; Make the coil losing electricity of AC contactor C, disconnection main hook drive motor is connected with three phase mains, and can avoid driving a vehicle the situation that maloperation causes the main hook high-altitude to be fallen occurs when main hook stops at upper limit; Simple and compact for structure, improved the safety of main hook work.
Claims (2)
1. the super spacing protective circuit structure of driving main hook comprises AC contactor, and said AC contactor has first open contact (1) and second open contact (2); Coil one end of said AC contactor is in series with the normally closed contact of the 8th overcurrent relay (8JL), the 7th overcurrent relay (7JL), the 6th overcurrent relay (6JL), the 5th overcurrent relay (5JL), the 4th overcurrent relay (4JL), the 3rd overcurrent relay (3JL), second overcurrent relay (2JL), first overcurrent relay (1JL), main overcurrent relay (DJL), fourth line journey switch (4AK), third trip switch (3AK), second travel switch (2AK) and first travel switch (1AK) respectively, and first travel switch (1AK) is connected with first normally closed contact (4) of cart cam controller, first normally closed contact (5) of main hook cam controller and first normally closed contact (6) of dolly cam controller through the normally closed contact of protection AC contactor (KA) successively; First normally closed contact (6) of said dolly cam controller links to each other with first open contact (1) through start button (QA1); Said first open contact (1) links to each other with second normally closed contact (11) of main hook cam controller, and second normally closed contact (11) of main hook cam controller links to each other with second normally closed contact (9) of the 9th travel switch (ZXK), dolly cam controller and the 3rd normally closed contact (10) of dolly cam controller respectively; The 3rd normally closed contact (10) of said dolly cam controller links to each other with the 3rd normally closed contact (8) of cart cam controller through the 7th travel switch (1XXK); The 3rd normally closed contact (8) of said cart cam controller links to each other with an end of second open contact (2) through fifth line journey switch (1DXK), and the other end of said second normally closed contact (2) links to each other corresponding to an end that links to each other with first normally closed contact (4) of cart cam controller with the normally closed contact of protection AC contactor (KA); Second normally closed contact (9) of dolly cam controller links to each other corresponding to an end that links to each other with the 3rd normally closed contact (8) of cart cam controller with the 7th travel switch (1XXK) through the 8th travel switch (2XXK); The 3rd normally closed contact (8) of cart cam controller links to each other with the 6th travel switch (2DXK) through second normally closed contact (7) of cart cam controller, and said the 6th travel switch (2DXK) links to each other corresponding to an end that links to each other with fifth line journey switch (1DXK) with second open contact (2) corresponding to the other end that links to each other with second normally closed contact (7) of cart cam controller; It is characterized in that: said the 9th limit switch (ZXK) links to each other through the coil of ultralimit bit switch (ZXXK) with protection AC contactor (KA), and said protection AC contactor (KA) coil links to each other corresponding to the other end that links to each other with the 8th overcurrent relay (8JL) with ac contactor coil corresponding to the other end that links to each other with ultralimit bit switch (ZXXK).
2. the super spacing protective circuit structure of driving main hook according to claim 1 is characterized in that: said start button (QA1) links to each other with first fuse (12) corresponding to an end that links to each other with first open contact (1); The coil of AC contactor links to each other with second fuse (3) corresponding to the other end that links to each other with the 8th overcurrent relay (8JL).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202853886U CN202265329U (en) | 2011-08-08 | 2011-08-08 | Super limit protection circuit structure for main hook of travelling crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202853886U CN202265329U (en) | 2011-08-08 | 2011-08-08 | Super limit protection circuit structure for main hook of travelling crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202265329U true CN202265329U (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202853886U Expired - Fee Related CN202265329U (en) | 2011-08-08 | 2011-08-08 | Super limit protection circuit structure for main hook of travelling crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202265329U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174060A (en) * | 2015-09-28 | 2015-12-23 | 河南省大方重型机器有限公司 | Control method for limiting of multi-trolley crane |
-
2011
- 2011-08-08 CN CN2011202853886U patent/CN202265329U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174060A (en) * | 2015-09-28 | 2015-12-23 | 河南省大方重型机器有限公司 | Control method for limiting of multi-trolley crane |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20140922 Granted publication date: 20120606 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20150322 Granted publication date: 20120606 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20200808 |
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| CF01 | Termination of patent right due to non-payment of annual fee |