CN104129716A - Tower crane electric control system - Google Patents
Tower crane electric control system Download PDFInfo
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- CN104129716A CN104129716A CN201410347831.6A CN201410347831A CN104129716A CN 104129716 A CN104129716 A CN 104129716A CN 201410347831 A CN201410347831 A CN 201410347831A CN 104129716 A CN104129716 A CN 104129716A
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- tower crane
- rpec
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- frequency converter
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Abstract
The invention relates to an automatic control technology, and discloses a novel tower crane electric control system. The defects of tedious wiring, high failure rate, difficult maintenance and high cost of tower crane electric control systems adopting traditional technologies are solved. The system comprises a linkage bench operating device, an external detection device, a safety protection device, an RPEC programmable electrical controller, various functional circuit control panels, a contactor, a frequency converter, a brake and a variable frequency motor; the linkage bench operating device, and the external detection device and the safety protection device are assessed into the input interface of the RPEC programmable electrical controller; the output interface of the RPEC programmable electrical controller, is connected with the various functional circuit control panels; the linkage bench operating device is connected with the various functional circuit control panels; the various functional circuit control panels are connected with the frequency converter and the contactor; the contactor is connected with the frequency converter and the brake; and the frequency converter and the brake are connected with the variable frequency motor and the external detection device. The electric control system is suitable for tower cranes.
Description
Technical field
The present invention relates to automatic control technology, particularly a kind of tower crane electric-control system.
Background technology
At present, the electric control project that the each serial mechanism of domestic tower crane generally adopts has two kinds: a kind of is the traditional logic Electrical Control Technology realizing by low-voltage electrical elements such as various intermediate relays, time relay, contactless switchs; Another kind is the technology that the programmable logic controller (PLC) of extensive employing is now realized logic electrical control.The first control technology is simple, and economy is applicable to logic control simple, low-end product.But owing to having used a large amount of intermediate relays, time relay, may, due to poor contact of contacts, easily break down, simultaneously because wiring is loaded down with trivial details, be not easy looking up the fault point, bring difficulty to maintenance.The second control technology can easily realize more complicated logic control, PLC software replacement time relay, the only remaining a small amount of hardware relevant with input and output, wiring can reduce to 1/10～1/100 of relay control system, the fault causing because of poor contact of contacts greatly reduces, and is applicable to high-end product; But this kind of mode need be used special programming software, specific store card, after not using for a long time or internal battery electric weight exhausts, easily causes loss of data, needs professional to safeguard, cost is higher.
Summary of the invention
Technical matters to be solved by this invention is: propose a kind of novel tower crane electric-control system, solve the defect that the wiring of tower crane electric-control system is loaded down with trivial details, fault rate is high, difficult in maintenance, cost is high in conventional art.
The present invention solves the problems of the technologies described above adopted technical scheme:
Tower crane electric-control system, comprises joint action table handling device, external detection device, safety guard, RPEC electric controller able to programme, each functional circuit control desk, contactless switch, frequency converter, drg, variable-frequency motor; Described joint action table handling device, external detection device, safety guard access to the input interface of RPEC electric controller able to programme; The output interface of described RPEC electric controller able to programme connects each functional circuit control desk; Described joint action table handling device connects each functional circuit control desk; Described each functional circuit control desk connects frequency converter and contactless switch; Described contactless switch connects frequency converter and drg; Described frequency converter is connected variable-frequency motor and described external detection device with drg.
Concrete, the external detection signal that described RPEC electric controller able to programme produces for the joint action table operation instruction signal to the generation of joint action table handling device, external detection device, the signal that safety guard produces judge processes and makes corresponding quick action response.
Concrete, the part joint action table operation instruction signal that described joint action table handling device produces is directly inputted into each functional circuit control desk.
Concrete, described external detection signal comprises frequency converter operating state signal, fault detection signal and frequency converter accessory overheating protection detection signal, drg detection signal.
Concrete, the signal that described safety guard produces comprises: limiting device signal, proving ring device signal and the moment device signal of tower machine mechanism.
Concrete, described contactless switch comprises main contactor, electromagnetic braking control contactor.
Concrete, described each functional circuit control desk comprises that instruction regulates electroplax, circuit conditioning plate, OCB control desk.
Concrete, the input interface of described RPEC electric controller able to programme, output interface all adopt Connector Clip form to connect.
The invention has the beneficial effects as follows:
1, compared with logic control in traditional tower crane electrical control, RPEC electric controller integrated level able to programme is high, can replace hundreds of control relay, as: time relay, intermediate relay;
2, compared with most widely used PLC programmable logic controller, without special programming software, adaptable, function specific aim is higher; Without storage card, data are difficult for losing, and wiring is simpler, convenient;
3, RPEC electric controller able to programme has high reliability, stability; Vibration resistance, anti-electromagnetic interference capability are strong, and repetition period is short, and logical process speed is high;
4, RPEC electric controller able to programme has the soft and hardware of independent intellectual property right, has higher confidentiality;
5, RPEC electric controller able to programme is modular construction, takes up room little, and annex is few, installs economical simple;
6, RPEC electric controller able to programme can be realized mass, standardized production, thereby simplifies the periphery design of electrical control, allows design standard, and highly versatile, makes cost;
7, RPEC electric controller able to programme adopts connector to connect, once there be damage, directly new product is changed in plug, and maintenance is simple, and cost is low.
Brief description of the drawings
Fig. 1 is the tower crane electric-control system schematic diagram in the present invention.
Detailed description of the invention
The present invention is intended to propose a kind of novel tower crane electric-control system, solves the defect that the wiring of tower crane electric-control system is loaded down with trivial details, fault rate is high, difficult in maintenance, cost is high in conventional art.
Below in conjunction with drawings and Examples, the solution of the present invention is further described:
As shown in Figure 1, the tower crane electric-control system in the present invention comprises joint action table handling device, external detection device, safety guard, RPEC electric controller able to programme, each functional circuit control desk, contactless switch, frequency converter, drg, variable-frequency motor; Described joint action table handling device, external detection device, safety guard access to the input interface of RPEC electric controller able to programme; The output interface of described RPEC electric controller able to programme connects each functional circuit control desk; Described joint action table handling device connects each functional circuit control desk; Described each functional circuit control desk connects frequency converter and contactless switch; Described contactless switch connects frequency converter and drg; Described frequency converter is connected variable-frequency motor and described external detection device with drg.
Wherein, described RPEC electric controller able to programme judges for the joint action table operation instruction signal that joint action table handling device is produced, the external detection signal that external detection device produces, the signal that safety guard produces the response fast of processing and act accordingly.In addition the part joint action table operation instruction signal that, described joint action table handling device produces is directly inputted into each functional circuit control desk.
Concrete, described external detection signal comprises frequency converter operating state signal, fault detection signal and frequency converter accessory overheating protection detection signal, drg detection signal.
Concrete, the signal that described safety guard produces comprises: limiting device signal, proving ring device signal and the moment device signal of tower machine mechanism.
Embodiment:
In tower machine 60LVF lifting mechanism electrical control cabinet, apply RPEC electric controller able to programme as example taking our company, this electric control system comprises joint action table handling device, external detection device, safety guard, RPEC electric controller able to programme, each functional circuit control desk, contactless switch, frequency converter, drg, variable-frequency motor.
The signal of the joint action table operation instruction signal that joint action table handling device produces, the external detection signal that external detection device produces, safety guard generation is as the input interface of incoming signal access RPEC electric controller able to programme.Operational tower machine combined operation platform, action command input RPEC electric controller able to programme, by RPEC electric controller internal processes able to programme to joint action table operation instruction signal, external detection signal, corresponding quick action response is made in the judgement of safety guard signal, output action instruction is to each functional circuit control desk, each functional circuit control desk is further processed and regulates the output signal of RPEC electric controller able to programme, input instruction is to frequency converter function terminal and corresponding contact device, control the relevant work state of drg, thereby realize the rotating operation of variable-frequency motor, stop and the adjusting of each gear speed.
Before the instruction of RPEC electric controller output action, need judge which kind of instruction the joint action table operating order of input is at internal processes; In external detection signal, judge whether frequency converter has fault output, whether has run signal output, and whether frequency converter accessory (brake unit) has overheating protection, drg opening signal etc. whether detected; In safety guard signal, need to judge that tower machine mechanism limiting device signal is whether in normally, whether moment device and proving ring device incoming signal be normal.After aforementioned all signals are judged fast, RPEC electric controller just can be exported command adapted thereto to each functional circuit control desk.
Circuit conditioning plate in each functional circuit control desk and OCB control desk the signal such as are opened to direction, fault, deceleration, operation, the braking of the output of RPEC electric controller able to programme and are amplified, process, and export respectively corresponding signal to frequency converter multifunction terminal and main contactor and electromagnetic braking control contactor; The analog signals of the gear signal that instruction regulating plate is exported RPEC electric controller able to programme and joint action table input is processed.
Main contactor, electromagnetic braking control contactor and frequency converter obtain after corresponding operating instruction, control opening of drg, drive variable-frequency motor, thereby realize safety, the reliability service of whole mechanism.
Claims (8)
1. tower crane electric-control system, is characterized in that, comprises joint action table handling device, external detection device, safety guard, RPEC electric controller able to programme, each functional circuit control desk, contactless switch, frequency converter, drg, variable-frequency motor; Described joint action table handling device, external detection device, safety guard access to the input interface of RPEC electric controller able to programme; The output interface of described RPEC electric controller able to programme connects each functional circuit control desk; Described joint action table handling device connects each functional circuit control desk; Described each functional circuit control desk connects frequency converter and contactless switch; Described contactless switch connects frequency converter and drg; Described frequency converter is connected variable-frequency motor and described external detection device with drg.
2. tower crane electric-control system as claimed in claim 1; it is characterized in that, described RPEC electric controller able to programme judges that for the joint action table operation instruction signal that joint action table handling device is produced, the external detection signal that external detection device produces, the signal that safety guard produces processing and make corresponding quick action responds.
3. tower crane electric-control system as claimed in claim 1 or 2, is characterized in that, the part joint action table operation instruction signal that described joint action table handling device produces is directly inputted into each functional circuit control desk.
4. tower crane electric-control system as claimed in claim 1 or 2, is characterized in that, described external detection signal comprises frequency converter operating state signal, fault detection signal and frequency converter accessory overheating protection detection signal, drg detection signal.
5. tower crane electric-control system as claimed in claim 1 or 2, is characterized in that, the signal that described safety guard produces comprises: limiting device signal, proving ring device signal and the moment device signal of tower machine mechanism.
6. tower crane electric-control system as claimed in claim 1 or 2, is characterized in that, described contactless switch comprises main contactor, electromagnetic braking control contactor.
7. tower crane electric-control system as claimed in claim 1 or 2, is characterized in that, described each functional circuit control desk comprises that instruction regulates electroplax, circuit conditioning plate, OCB control desk.
8. tower crane electric-control system as claimed in claim 1 or 2, is characterized in that, the input interface of described RPEC electric controller able to programme, output interface all adopt Connector Clip form to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410347831.6A CN104129716A (en) | 2014-07-21 | 2014-07-21 | Tower crane electric control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410347831.6A CN104129716A (en) | 2014-07-21 | 2014-07-21 | Tower crane electric control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104129716A true CN104129716A (en) | 2014-11-05 |
Family
ID=51802637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410347831.6A Pending CN104129716A (en) | 2014-07-21 | 2014-07-21 | Tower crane electric control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104129716A (en) |
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2014
- 2014-07-21 CN CN201410347831.6A patent/CN104129716A/en active Pending
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Application publication date: 20141105 |
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| RJ01 | Rejection of invention patent application after publication |