CN202704853U - Two-stage brake device for rotating mechanism of gantry crane - Google Patents
Two-stage brake device for rotating mechanism of gantry crane Download PDFInfo
- Publication number
- CN202704853U CN202704853U CN 201220116576 CN201220116576U CN202704853U CN 202704853 U CN202704853 U CN 202704853U CN 201220116576 CN201220116576 CN 201220116576 CN 201220116576 U CN201220116576 U CN 201220116576U CN 202704853 U CN202704853 U CN 202704853U
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- CN
- China
- Prior art keywords
- gantry crane
- limit switch
- rotating mechanism
- stage
- speed reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
Provided is a two-stage brake device for a rotating mechanism of a gantry crane. A limit sensing blocking plate is arranged on a brake pedal, a first stage speed reduction limit switch and a second stage speed reduction limit switch are sequentially arranged on a limit installation plate matched with the limit sensing blocking plate, the first stage speed reduction limit switch and the second stage speed reduction limit switch are respectively connected with a programmable logic controller (PLC) input module, the PLC input module is connected with the frequency changer, and the frequency changer is connected with a rotating three-phase asynchronous motor of the gantry crane. The two-stage brake device for the rotating mechanism of the gantry crane is simple in structure and high in control accuracy, effectively solves the problems of stable running of the rotating mechanism of the gantry crane which is used for loading and unloading large-tonnage sundry goods and can substantially and continuously run at high speed, can avoid impact caused by different factors of wind speed, inertia, mechanical installation, driver control methods and the like in running of the gantry crane, improves running stability and reduces equipment faults and mechanical structure and component damage caused by impact.
Description
Technical field
The utility model belongs to the handling equipment span winch control setup of (being called for short the door machine), and special design is a kind of
Gantry crane rotating mechanism two stage shut device
Background technology
Span winch (door machine) is the main large-scale handling equipment of harbour handling production operation, and its safety, smooth operation are the keys that guarantees that loading and unloading are produced.According to door machine structure and work characteristics, its rotating mechanism is to impact maximum mechanism in the equipment variable load that is subject in service, these factors mainly comprise the not equal factor of wind speed reason, inertia reason, machinery row dress and driver's mode, especially large-tonnage, significantly be used for the door machine (such as the above rank door of 40t-33m machine) of loose break-bulk operation, in the situation of amplitude peak maximum load, the variation randomness of its rotary load characteristic is very strong and alter a great deal, therefore the fault of each system of this mechanism also is the highest, and the parts of damage are also maximum.In order to solve the effectively problem of smooth running of this mechanism, in door machine rotation drive controlling system, use employing two stage shut control technology in Closed loop Control and the brake system by research, improve this mechanism's traveling comfort.
Summary of the invention
The purpose of this utility model provides a kind of gantry crane rotating mechanism two stage shut device.Solve the loose break-bulk operation door machine rotating mechanism smooth running problem of harbour handling large-tonnage, significant continuous high speed operation, it can solve the impact that a machine causes because of wind speed, inertia, the mechanical equal factor of arranging dress and driver's mode that is subject to when operation, improve this mechanism's running stability, reduce the damage of the breakdown of equipment that causes because of impact and physical construction, parts.
Particular content of the present utility model:
A kind of gantry crane rotating mechanism two stage shut device is characterized in that: at braking footrest the limit induction baffle plate is housed, with on the limit mounting plate that the limit induction baffle plate cooperates successively order primary speed-down limit switch, double reduction limit switch are housed; Primary speed-down limit switch and double reduction limit switch respectively connect the PLC load module, and the PLC load module connects frequency converter, and frequency converter connects the gantry crane rotation threephase asynchronous machine.
Advantage of the present utility model:
This gantry crane rotating mechanism two stage shut device, simple in structure, control accuracy is high, effectively solve the loose break-bulk operation door machine rotating mechanism smooth running problem of harbour handling large-tonnage, significant continuous high speed operation, it can solve the impact that a machine causes because of wind speed, inertia, the mechanical equal factor of arranging dress and driver's mode that is subject to when operation, improve this mechanism's running stability, reduce the damage of the breakdown of equipment that causes because of impact and physical construction, parts.
Description of drawings
Fig. 1 is gantry crane rotating mechanism two stage shut device stretcher scheme drawing.
Fig. 2 is the electric functional block diagram of gantry crane rotating mechanism two stage shut device.
The specific embodiment
A kind of gantry crane rotating mechanism two stage shut device as shown in Figure 1, at braking footrest 1 limit induction baffle plate 2 is housed, with on the limit mounting plate 3 that the limit induction baffle plate cooperates successively order primary speed-down limit switch 4, double reduction limit switch 5 are housed; There is retracing spring 6 braking footrest 1 below.
As shown in Figure 2: primary speed-down limit switch and double reduction limit switch respectively connect the PLC load module, and the PLC load module connects frequency converter, and frequency converter connects the gantry crane rotation threephase asynchronous machine.
This gantry crane rotating mechanism two stage shut device, 1, in door machine driving control system, adopt close-loop control mode, utilize the closed loop control characteristic can greatly improve control accuracy and response characteristic, guarantee that drive system steadily exports; 2, in its brake system, adopt the spacing control of two stage shut, when braking footrest depress detect one-level when spacing control-driven system export automatic downshift, keeping the drive system electromagnetic braking to continue output, and timely downshift or directly return zero and cause the unusual impact shock that produces of braking can prevent from making because of the driver operation master time.Along with braking footrest is progressively downward, mechanical braking increases thereupon, cuts off the drive system power supply when spacing when detecting secondary.
Claims (1)
1. gantry crane rotating mechanism two stage shut device, it is characterized in that: at braking footrest the limit induction baffle plate is housed, with on the limit mounting plate that the limit induction baffle plate cooperates successively order primary speed-down limit switch, double reduction limit switch are housed; Primary speed-down limit switch and double reduction limit switch respectively connect the PLC load module, and the PLC load module connects frequency converter, and frequency converter connects the gantry crane rotation threephase asynchronous machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220116576 CN202704853U (en) | 2012-03-26 | 2012-03-26 | Two-stage brake device for rotating mechanism of gantry crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220116576 CN202704853U (en) | 2012-03-26 | 2012-03-26 | Two-stage brake device for rotating mechanism of gantry crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202704853U true CN202704853U (en) | 2013-01-30 |
Family
ID=47585177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220116576 Expired - Lifetime CN202704853U (en) | 2012-03-26 | 2012-03-26 | Two-stage brake device for rotating mechanism of gantry crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202704853U (en) |
-
2012
- 2012-03-26 CN CN 201220116576 patent/CN202704853U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |