CN204802872U - Tower crane hoisting mechanism safety limiting speed reduction frequency control system - Google Patents
Tower crane hoisting mechanism safety limiting speed reduction frequency control system Download PDFInfo
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- CN204802872U CN204802872U CN201520337197.8U CN201520337197U CN204802872U CN 204802872 U CN204802872 U CN 204802872U CN 201520337197 U CN201520337197 U CN 201520337197U CN 204802872 U CN204802872 U CN 204802872U
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Abstract
The utility model relates to a tower crane, the purpose is exactly inconvenient in order to solve the tower machine safety limiting speed reduction speed regulation who adopts the speed governing of converter analog quantity to and the unsatisfactory problem of speed reduction speed. The present invention provides tower crane hoisting mechanism safety limiting speed reduction frequency control system, including speed reduction frequency control module, safety limiting ware, a linkage platform control module, converter and power module linkage platform control module and speed reduction frequency control module's foreign frequency command input port, motor direction input port and the instruction port that slows down are connected, the frequency instruction output port of speed reduction frequency control module and the analog signal input port of converter are connected, the control circuit terminal and the speed reduction frequency control module motor direction output port of converter connect, power module is connected with linkage platform the control unit and safety limiting ware respectively, and safety limiting ware and speed reduction frequency control module detect the signal input part mouth and be connected.
Description
Technical field
The utility model relates to tower crane, particularly a kind of lifting mechanism of tower crane safe spacing deceleration frequency control system.
Background technology
In lifting mechanism of tower crane rise/fall operational process, when lifting mechanism runs to safe spacing deceleration point, mechanism should be decelerated to safety speed operation.At present, the following three kinds of settling modes of general employing, mode one: by relay or PLC, cuts off the high gear run, and connects rise/fall first gear speed; Mode two: to adopting the lifting mechanism of tower crane that the integration degree such as frequency converter are high, is switched to the frequency converter multistage speed instruction point being set to deceleration frequency, carries out decelerated movement with the frequency of the multistage pre-set speed point by relay or PLC; Mode three: to the lifting mechanism of tower crane adopting frequency converter, be switched to the crawl instruction point of frequency converter by relay or PLC, carry out speed-down action with the some dynamic frequency pre-set, thus realize the action of running slowly of safe spacing.Although wherein mode one structure is simple, but be limited by the restriction of lifting mechanism deep low gear speed, can not realize running slowly speed lower than the safety of this gear, mode two and mode three need to realize by converter parameter, use the control loop multifunctional dot position of frequency converter, for adopting, the mechanism of frequency converter Analog control mode is inapplicable.
Utility model content
The purpose of this utility model is exactly adopt the tower machine safe spacing geard-down speed of frequency converter analog quantity speed governing to regulate inconvenience to solve, and the problem that geard-down speed is undesirable.
For achieving the above object, the utility model provides a kind of lifting mechanism of tower crane safe spacing deceleration frequency control system, comprise deceleration frequency control module, safety position limiter, joint action table control module, frequency converter and power module, the foreign frequency instruction input port of described joint action table control module and deceleration frequency control module, motor drive direction input port and deceleration instruction port are connected, the frequency instruction output port of described deceleration frequency control module is connected with the analog signals input port of frequency converter, the control loop terminal of described frequency converter is connected with deceleration frequency control module motor drive direction output port, described power module is connected with joint action table control unit and safety position limiter respectively, safety position limiter is connected with deceleration frequency control module detection signal input port.
Whether safety position limiter has run to deceleration limit point for detecting Lift Mechanism in Power Hoist, and joint action table control module is used for providing the instruction of lifting mechanism rise/fall and the instruction of frequency converter running frequency.
Particularly, described joint action table control module comprises speed in frequency instruction input unit and Lift Mechanism in Power Hoist up/down operation control unit.
Particularly, described deceleration frequency control module comprises light-emitting diode, resistance, potential device and DC relay, be connected with the coil of DC relay after described light emitting diode is in series with a resistor, the on-state of the contact controlling potential device of DC relay, is all connected by pcb board circuit.
Particularly, described power module is 24V direct supply.
The beneficial effects of the utility model are: control by deceleration frequency the safe spacing deceleration setting that mould can realize the speed governing of frequency converter analog quantity, make safe spacing deceleration point operate debugging to simplify, user can set rapidly according to actual conditions the speed in frequency value needing to reach.
Below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail; should be noted that; embodiment is only used to help reader to understand technical conceive of the present utility model better, not in order to limit protection domain of the present utility model.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the lifting mechanism of tower crane safe spacing deceleration frequency control system of the utility model embodiment.
Detailed description of the invention
The utility model is that the tower machine safe spacing geard-down speed solving the speed governing of existing employing frequency converter analog quantity regulates inconvenience, and the problem that geard-down speed is undesirable, a kind of lifting mechanism of tower crane safe spacing deceleration frequency control system is provided, described deceleration frequency control module comprises light-emitting diode, resistance, potential device and DC relay, be connected with the coil of DC relay after described light emitting diode is in series with a resistor, the on-state of the contact controlling potential device of DC relay, is all connected by pcb board circuit.
Embodiment
As shown in Figure 1, lifting mechanism of tower crane safe spacing deceleration frequency control system, comprises deceleration frequency control module, safety position limiter, joint action table control module, frequency converter and power module.Joint action table control module comprises speed in frequency instruction input unit and Lift Mechanism in Power Hoist up/down operation control unit, for providing the instruction of lifting mechanism rise/fall and the instruction of frequency converter running frequency.Deceleration frequency control module comprises light-emitting diode, resistance, potential device and DC relay, is connected after described light emitting diode is in series with a resistor with the coil of DC relay, the on-state of the contact controlling potential device of DC relay.The foreign frequency instruction input port of joint action table control module and deceleration frequency control module, motor drive direction input port and deceleration instruction port are connected, the frequency instruction output port of deceleration frequency control module is connected with the analog signals input port of frequency converter, the control loop terminal of frequency converter is connected with deceleration frequency control module motor drive direction output port, power module is connected with joint action table control unit and safety position limiter respectively, and power module provides DC24V power supply to supply the check point of joint action table control module and safety position limiter.
The principle of work of this system is as follows:
Joint action table control module provides speed in frequency command signal and Lift Mechanism in Power Hoist up/down operation-command signal, when joint action table control module send upwards operating instruction time, the motor drive direction input port of deceleration frequency control module obtains instruction, treatedly export Frequency Converter Control loop terminals to, frequency converter receives and rotates forward operating instruction and starts to rotate forward and export.The simultaneously speed in frequency instruction that sends of joint action table control module is by the foreign frequency instruction output end mouth of deceleration frequency control module to the analog signals input port of frequency converter, and frequency converter carries out the output of corresponding frequencies according to speed command.When Lift Mechanism in Power Hoist upwards running velocity exceed frequency values corresponding to joint action table control module deceleration instruction point, and mechanism runs to the deceleration restraining position below the maximum permission rise height of tower machine, safety position limiter detects deceleration point and sends signal, the instruction of the foreign frequency of deceleration frequency control module cut-out immediately inputs and connects deceleration frequency control loop, the output of deceleration frequency is carried out arranging and adjusting by the potential device on deceleration frequency control module deceleration frequency control loop in advance, frequency converter obtains preset deceleration frequency instruction, carry out the output of safe geard-down speed frequency, lifting mechanism runs with the speed of this deceleration frequency instruction.When upwards running velocity is lower than the frequency values that joint action table deceleration instruction point is corresponding for tower machine, even if safety position limiter detects deceleration point signal, motor is still pressed the given signal of joint action table control module and is run.
When the downward running velocity of Lift Mechanism in Power Hoist exceedes frequency values corresponding to joint action table control module deceleration instruction point, and mechanism runs to the deceleration restraining position above the maximum permission falling head of tower machine, safety position limiter detects deceleration point and sends signal, deceleration frequency controls cross cutting foreign frequency instruction of breaking and inputs and connect deceleration frequency control loop immediately, the output of deceleration frequency is carried out arranging and adjusting by the potential device on deceleration frequency control module deceleration frequency control loop in advance, frequency converter obtains preset deceleration frequency instruction, carry out the output of safe geard-down speed frequency, lifting mechanism runs with the speed of this deceleration frequency instruction.If when now the given speed value run downwards of tower machine is lower than the frequency values that joint action table deceleration instruction point is corresponding, even if safety position limiter detects deceleration point signal, motor is still pressed the given speed signal of joint action table control module and is run.If the given speed value of running velocity is higher than deceleration frequency control module setting value downwards, run with this setting value.
Claims (4)
1. lifting mechanism of tower crane safe spacing deceleration frequency control system, it is characterized in that, comprise deceleration frequency control module, safety position limiter, joint action table control module, frequency converter and power module, the foreign frequency instruction input port of described joint action table control module and deceleration frequency control module, motor drive direction input port and deceleration instruction port are connected, the frequency instruction output port of described deceleration frequency control module is connected with the analog signals input port of frequency converter, the control loop terminal of described frequency converter is connected with deceleration frequency control module motor drive direction output port, described power module is connected with joint action table control unit and safety position limiter respectively, safety position limiter is connected with deceleration frequency control module detection signal input port.
2. lifting mechanism of tower crane safe spacing deceleration frequency control system as claimed in claim 1, it is characterized in that, described joint action table control module comprises speed in frequency instruction input unit and Lift Mechanism in Power Hoist up/down operation control unit.
3. lifting mechanism of tower crane safe spacing deceleration frequency control system as claimed in claim 1 or 2, it is characterized in that, described deceleration frequency control module comprises light-emitting diode, resistance, potential device and DC relay, be connected with the coil of DC relay after described light emitting diode is in series with a resistor, the on-state of the contact controlling potential device of DC relay.
4. lifting mechanism of tower crane safe spacing deceleration frequency control system as claimed in claim 3, it is characterized in that, described power module is 24V direct supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520337197.8U CN204802872U (en) | 2015-05-22 | 2015-05-22 | Tower crane hoisting mechanism safety limiting speed reduction frequency control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520337197.8U CN204802872U (en) | 2015-05-22 | 2015-05-22 | Tower crane hoisting mechanism safety limiting speed reduction frequency control system |
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| CN204802872U true CN204802872U (en) | 2015-11-25 |
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| CN201520337197.8U Active CN204802872U (en) | 2015-05-22 | 2015-05-22 | Tower crane hoisting mechanism safety limiting speed reduction frequency control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110422766A (en) * | 2019-08-21 | 2019-11-08 | 成都曼吉电气科技有限公司 | A kind of signal adaptation system control method |
| CN112408202A (en) * | 2019-08-20 | 2021-02-26 | 湖南中联重科建筑起重机械有限责任公司 | Control method and control system for crane and tower crane |
-
2015
- 2015-05-22 CN CN201520337197.8U patent/CN204802872U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112408202A (en) * | 2019-08-20 | 2021-02-26 | 湖南中联重科建筑起重机械有限责任公司 | Control method and control system for crane and tower crane |
| CN110422766A (en) * | 2019-08-21 | 2019-11-08 | 成都曼吉电气科技有限公司 | A kind of signal adaptation system control method |
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