CN202744242U - Over-jacking protection device of self-jacking type tower crane - Google Patents
Over-jacking protection device of self-jacking type tower crane Download PDFInfo
- Publication number
- CN202744242U CN202744242U CN 201220451805 CN201220451805U CN202744242U CN 202744242 U CN202744242 U CN 202744242U CN 201220451805 CN201220451805 CN 201220451805 CN 201220451805 U CN201220451805 U CN 201220451805U CN 202744242 U CN202744242 U CN 202744242U
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- jacking
- self
- protection device
- over
- tower crane
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Abstract
The utility model relates to an over-jacking protection device of a self-jacking type tower crane. The crane is provided with a jacking beam and a jacking casing rack, wherein the jacking casing rack is connected with a jacking oil cylinder, the jacking oil cylinder is connected with a jacking control loop, the jacking beam is provided with an ultrasonic emitter, a truss of the jacking casing rack is provided with an ultrasonic receiver, and the ultrasonic receiver is horizontally opposite to the ultrasonic emitter when the jacking casing rack rises to the top limit; and the ultrasonic receiver is connected with a coil of a contactor, and a normally closed contact switch of the contactor is connected in the jacking control loop in series. The over-jacking protection device of the self-jacking type tower crane has the beneficial effects of simple structure and convenience in assembly and disassembly, and also has the advantages that the over-jacking protection device can prevent false operation situations from occurring, and enhance the safety and the reliability of the operation.
Description
Technical field
The utility model relates to the anti-roof protective device that emits of a kind of self-raising tower crane jacking.
Background technology
The safety method of present self-raising tower crane; mainly be that the hydraulic lock that relies on hydraulic actuating cylinder to carry plays a protective role when namely two hydraulic control one-way valves are combined in the generation physical damage; if but because misoperation or carelessness cause cylinder jacking too high, just have the danger of jacking stock roof fall.
Summary of the invention
For solving above technical deficiency, the utility model provides a kind of simple in structure, easy accessibility, the anti-roof protective device that emits of the self-raising tower crane jacking of dependable performance.
The utility model is realized by following measures:
The anti-roof protective device that emits of the jacking of a kind of self-raising tower crane of the present utility model; this hoisting crane is provided with jacking cross beam and jacking stock; described jacking stock is connected with jacking cylinder; jacking cylinder is connected with the jacking control loop; be provided with ultrasonic transmitter on the described jacking cross beam; be provided with on the truss of described jacking stock when the jacking stock rise in limited time can be relative with the ultrasonic transmitter level on the top ultrasonic receiver; described ultrasonic receiver is connected with the coil of contactless switch, and the normally closed contact switch series of described contactless switch is associated in the jacking control loop.
The beneficial effects of the utility model are:
Simple in structure, conveniently assemble and disassemble can avoid the misoperation situation to occur, and has improved safety and the reliable rows of operation.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: 1 ultrasonic transmitter, 2 ultrasonic receivers, 3 jacking cross beams, 4 jacking stocks.
The specific embodiment
As shown in Figure 1, the jacking of a kind of self-raising tower crane of the present utility model is anti-emits roof protective device, this hoisting crane to be provided with jacking cross beam 3 and jacking stock 4, and jacking stock 4 is connected with jacking cylinder, and jacking cylinder is connected with the jacking control loop.As shown in the figure, wherein, ultrasonic transmitter 1 is installed on the jacking cross beam 3, and ultrasonic receiver 2 is fixed on jacking stock 4 truss, and ultrasonic receiver 2 is connected with the coil of contactless switch, and the normally closed contact switch series of contactless switch is associated in the jacking control loop.
When non-jacking state or jacking were not in place, ultrasonic transmitter 1 and ultrasonic receiver 2 can't form correlation not at same plane, and this moment, ultrasonic receiver 2 did not have signal output; When carrying out lifting operation, along with jacking cylinder stretches out gradually, jacking stock 4 rises gradually, at this moment, and the invariant position of jacking cross beam 3; When jacking strut bar during a little more than standard knot upper class jacking ear plate, hydraulic ram need to stop the jacking operating mode, we will handle jacking strut bar operating control swings in strut bar, when rising on the top, jacking stock 4 prescribes a time limit, ultrasonic receiver 2 is corresponding with ultrasonic transmitter 1 transmitting terminal level, ultrasonic receiver 2 output electrical signals, so that the coil of contactless switch gets is electric, the normally closed contact switch of contactless switch disconnects, thereby cut off the jacking control loop, jacking cylinder quits work, and prevents the generation of roof fall accident.
Not electrical connection between ultrasonic transmitter 1 and the ultrasonic receiver 2 faces up emitter facet or receptor to install when preventing at right angle setting and causes dust granule to pile up, and we adopt horizontal mounting means.
The fixed form of ultrasonic transmitter 1 and ultrasonic receiver 2 is comparatively flexible, and for for convenience detach, we adopt sensor and equipment to carry out bolt to be connected.At 6mm plate iron of the attachment point position of equipment welding, the above joins the bolt of M5 and fixes according to the position tapping of sensor perforate.
Ultrasonic transmitter 1 and ultrasonic receiver 2 use PEPPERL FUCHS (P+F) correlation type ultrasonic transduter (model UBE6000+U1+SA2).
Above-described embodiment is described to be to specify this patent; though describe by specific term in the literary composition; but can not limit with this protection domain of this patent; being familiar with the personage of this technical field can be after the spirit of understanding this patent and principle change or revises it and reach equivalent purpose; and this equivalence change and modification all should be covered by the claim scope and define in the category.
Claims (1)
1. the jacking of a self-raising tower crane prevents emitting roof protective device; this hoisting crane is provided with jacking cross beam and jacking stock; described jacking stock is connected with jacking cylinder; jacking cylinder is connected with the jacking control loop; it is characterized in that: be provided with ultrasonic transmitter on the described jacking cross beam; be provided with on the truss of described jacking stock when the jacking stock rise in limited time can be relative with the ultrasonic transmitter level on the top ultrasonic receiver; described ultrasonic receiver is connected with the coil of contactless switch, and the normally closed contact switch series of described contactless switch is associated in the jacking control loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451805 CN202744242U (en) | 2012-09-06 | 2012-09-06 | Over-jacking protection device of self-jacking type tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451805 CN202744242U (en) | 2012-09-06 | 2012-09-06 | Over-jacking protection device of self-jacking type tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202744242U true CN202744242U (en) | 2013-02-20 |
Family
ID=47703671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220451805 Expired - Fee Related CN202744242U (en) | 2012-09-06 | 2012-09-06 | Over-jacking protection device of self-jacking type tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202744242U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613017A (en) * | 2013-12-06 | 2014-03-05 | 辽宁省安全科学研究院 | Online monitoring system and method for position status of tower crane jacking system |
| CN110467130A (en) * | 2019-08-01 | 2019-11-19 | 四川川交路桥有限责任公司 | Has the climbing system that ultrasonic wave control multiple spot level is promoted |
-
2012
- 2012-09-06 CN CN 201220451805 patent/CN202744242U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613017A (en) * | 2013-12-06 | 2014-03-05 | 辽宁省安全科学研究院 | Online monitoring system and method for position status of tower crane jacking system |
| CN103613017B (en) * | 2013-12-06 | 2016-01-13 | 辽宁省安全科学研究院 | Tower crane lifting alliance state online monitoring system and method for supervising |
| CN110467130A (en) * | 2019-08-01 | 2019-11-19 | 四川川交路桥有限责任公司 | Has the climbing system that ultrasonic wave control multiple spot level is promoted |
| CN110467130B (en) * | 2019-08-01 | 2024-03-26 | 四川川交路桥有限责任公司 | Climbing system with ultrasonic control for multipoint horizontal lifting |
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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: 20130220 Termination date: 20170906 |