CN110240068B - Bypass-shared crane pressure regulating control system and control method - Google Patents
Bypass-shared crane pressure regulating control system and control method Download PDFInfo
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- CN110240068B CN110240068B CN201910440466.6A CN201910440466A CN110240068B CN 110240068 B CN110240068 B CN 110240068B CN 201910440466 A CN201910440466 A CN 201910440466A CN 110240068 B CN110240068 B CN 110240068B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/22—Control systems or devices for electric drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
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- Automation & Control Theory (AREA)
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- Control And Safety Of Cranes (AREA)
Abstract
The invention discloses a crane voltage regulation control system sharing a bypass and a control method, wherein the control system comprises a P L C controller, a bypass selection switch, a lifting voltage regulation main circuit, a lifting voltage regulation bypass, a walking voltage regulation main circuit, a walking voltage regulation bypass and a storage module, wherein the lifting voltage regulation main circuit and the walking voltage regulation main circuit have the same structure and comprise a plurality of voltage regulation branches which are connected in parallel, the lifting voltage regulation bypass and the walking voltage regulation bypass have the same structure and comprise a bypass voltage regulation controller and a plurality of circuit breakers to form an input circuit and a plurality of output circuits, and the control method comprises four steps of voltage regulation bypass selection, voltage regulation bypass operation, voltage regulation main circuit selection and voltage regulation main circuit recovery operation.
Description
Technical Field
The invention relates to the field of crane safety control, in particular to a crane pressure regulating control system and a crane pressure regulating control method sharing a bypass.
Background
The existing crane is applied to various industrial production fields, along with the continuous promotion of the intelligent level of the crane, the requirement of enterprises on the production efficiency is higher and higher, and the requirement on the fault-free running time of crane equipment is correspondingly improved. If the equipment stops in case of failure, the economic benefit of enterprises is directly influenced. Therefore, the crane often adopts a control circuit with a bypass of the pressure regulating governor. The crane circuit can be quickly switched to the standby bypass for voltage regulation control when the main circuit voltage regulation controller fails to control so as to ensure the normal operation of the crane.
However, in the existing production, one crane often has a plurality of pressure regulating mechanisms, and if each mechanism of the crane is provided with one set of pressure regulating bypass, the cost is increased, the circuit is complicated, and the failure rate is correspondingly increased.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses a crane pressure regulating control system and a crane pressure regulating control method sharing a bypass, wherein a crane hoisting mechanism and a travelling mechanism are respectively provided with only one set of independent standby bypass pressure regulating controllers, and the bypass pressure regulating work of each mechanism is realized through P L C programming control, so that the cost is effectively saved, the occupied space of electrical elements is reduced, and meanwhile, the error rate of manual wiring and the fault rate of a crane are reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
a crane voltage regulation control system sharing a bypass comprises a P L C controller, a bypass selection switch, a lifting voltage regulation main circuit, a lifting voltage regulation bypass, a walking voltage regulation main circuit, a walking voltage regulation bypass and a storage module, wherein the bypass selection switch is connected with the input end of the P L C controller and used for transmitting a bypass selection signal to a P L C controller;
the lifting voltage regulating main circuit comprises n voltage regulating branches, wherein the voltage regulating branches are connected in parallel, the voltage regulating branch circuits have the same structure and respectively comprise a voltage regulating controller and two circuit breakers QF, the connection modes of the voltage regulating branches are the same, the input end of the voltage regulating controller is connected with the output end of a P L C controller through one circuit breaker QF and is used for receiving a P L C voltage regulating control signal, and the output end of the voltage regulating controller is connected with a corresponding lifting mechanism through another circuit breaker QF and is used for transmitting the lifting control signal to the corresponding lifting mechanism;
the lifting voltage-regulating bypass comprises a bypass voltage-regulating controller and n +1 circuit breakers QF, wherein the input end of the bypass voltage-regulating controller is connected with the output end of a P L C controller through one circuit breaker QF to form an input line for receiving a P L C bypass voltage-regulating control signal;
in the lifting pressure regulating main circuit and the lifting pressure regulating bypass, n is the number of lifting mechanisms of the crane.
Preferably, the circuit structure of the walking voltage regulating main circuit is the same as that of the lifting voltage regulating main circuit, and the walking voltage regulating main circuit comprises m voltage regulating branches, wherein the output end of each voltage regulating branch is connected with the corresponding walking mechanism and used for transmitting a walking control signal to the corresponding walking mechanism; the circuit structure of the walking voltage regulation bypass is the same as that of the lifting voltage regulation bypass, the walking voltage regulation bypass comprises a bypass voltage regulation controller and m +1 circuit breakers QF to form an input line and m output lines, and the output end of each output line is connected with the corresponding walking mechanism and used for transmitting a bypass walking control signal to the corresponding walking mechanism;
in the walking pressure regulating main circuit and the walking pressure regulating bypass, m is the number of the crane walking mechanisms.
Preferably, the input end of the P L C controller is connected to the operating handle for receiving information whether the operating handle is located at the zero position.
The invention also provides a control method of the crane pressure regulating control system sharing the bypass, which comprises four steps,
the method comprises the steps that firstly, a voltage regulating bypass is selected, the ith branch of a voltage regulating main circuit breaks down, a bypass selection switch is switched to the voltage regulating bypass, a P L C controller controls the ith branch of the voltage regulating main circuit to be disconnected according to a feedback signal of the ith branch, and a P L C controller controls an input circuit of the voltage regulating bypass to be connected with an output circuit of the voltage regulating bypass connected with an i # operating mechanism;
secondly, the pressure regulating bypass works, when the working conditions of the pressure regulating bypass are completely met, the P L C controller reads bypass pressure regulating control parameters required by the i # running mechanism, and the P L C controller controls the pressure regulating bypass controller to carry out pressure regulating work of the i # running mechanism;
the P L C controller controls the ith branch of the voltage regulating main circuit to be switched on according to a feedback signal of the ith branch of the voltage regulating main circuit;
fourthly, the main voltage regulating circuit recovers work, and a P L C controller reads voltage regulating control parameters required by the i # running mechanism after the main voltage regulating circuit recovers all working conditions, and controls the i-th branch voltage regulating controller of the main voltage regulating circuit to perform voltage regulating work of the i # running mechanism by the P L C controller;
the i # running mechanism is an i # lifting mechanism or an i # travelling mechanism; when the i # operation mechanism is an i # hoisting mechanism, the pressure regulating main circuit is a hoisting pressure regulating main circuit 3, the pressure regulating bypass is a hoisting pressure regulating bypass 4, i is more than or equal to 1 and less than or equal to n, and n is the number of hoisting mechanisms of the crane; when the i # running mechanism is an i # running mechanism, the pressure regulating main circuit is a running pressure regulating main circuit 5, the pressure regulating bypass is a running pressure regulating bypass 6, i is more than or equal to 1 and is less than or equal to m, and m is the number of the running mechanisms of the crane.
Preferably, the working conditions of the voltage regulating bypass include whether the faulted voltage regulating main circuit breaker QF is opened, whether the selected voltage regulating bypass breaker QF is closed, and whether the operating handle returns to a zero position.
Preferably, the recovery voltage regulation main circuit working conditions include whether the selected voltage regulation bypass circuit breaker QF is opened, whether the fault-removing voltage regulation main circuit breaker QF is closed, and whether the operating handle recovers a zero position.
Preferably, the method is also suitable for the condition that a plurality of branches of the main voltage regulating circuit of the crane running mechanism have faults simultaneously.
By adopting the technical scheme, the invention has the advantages that for the crane device with a plurality of lifting mechanisms and travelling mechanisms, only one set of independent standby bypass voltage regulation controllers are respectively arranged for the lifting mechanisms and the travelling mechanisms, various external signals are input into the P L C controller, and the bypass voltage regulation work of each mechanism is realized through internal program control, so that the complexity of an external control logic circuit is reduced, the occupied space of an electric element is reduced, the cost is effectively saved, and meanwhile, the error rate of manual wiring and the fault rate of a crane are reduced.
The crane has the advantages of simple structure, stable performance and high reliability, and can effectively improve the running safety of the crane.
Drawings
FIG. 1 is a schematic diagram of a voltage regulation control system according to the present invention;
FIG. 2 is a schematic structural diagram of a lifting voltage regulating main circuit and a lifting voltage regulating bypass of the invention;
FIG. 3 is a schematic structural diagram of a walking voltage regulating main circuit and a walking voltage regulating bypass according to the present invention;
FIG. 4 is a flow chart of the voltage regulation control method of the present invention.
In the figure, a P L C controller 1, a bypass selection switch 2, a lifting voltage regulation main circuit 3, a lifting voltage regulation bypass 4, a walking voltage regulation main circuit 5, a walking voltage regulation bypass 6, a storage module 7, a voltage regulation controller 8 and a bypass voltage regulation controller 9 are included.
Detailed Description
The present invention will be explained in detail by the following examples, which are intended to protect all technical improvements within the scope of the present invention and are not limited thereto.
As shown in fig. 1, the voltage regulation control system of the invention comprises a control P L C controller 1, a bypass selection switch 2, a lifting voltage regulation main circuit 3, a lifting voltage regulation bypass 4, a walking voltage regulation main circuit 5, a walking voltage regulation bypass 6 and a storage module 7.
The bypass selection switch 2 is connected with the input end of the P L C controller 1 and used for transmitting a bypass selection signal to the P L C controller 1, when the bypass selection switch 2 is switched to the voltage regulation bypass, the P L C controller 1 receives the signal and prepares to start the voltage regulation bypass, and when the bypass selection switch 2 is switched to the main voltage regulation circuit, the P L C controller 1 receives the signal and prepares to restore the main voltage regulation circuit.
The storage module 7 is connected with the P L C controller 1 and is used for transmitting the stored pressure regulating control related parameters to the P L C controller 1 so as to control different types of running mechanisms, and the pressure regulating control related parameters are written into the storage module 7 by workers before the crane runs.
The lifting pressure regulating main circuit 3, the lifting pressure regulating bypass 4, the walking pressure regulating main circuit 5 and the walking pressure regulating bypass 6 are connected in parallel, input ends of the lifting pressure regulating main circuit 3, the walking pressure regulating main circuit 5 and the walking pressure regulating bypass 6 are respectively connected with an output end of the P L C controller 1 and used for receiving pressure regulating control signals, in a normal state, the lifting pressure regulating main circuit 3 and the walking pressure regulating main circuit 5 are used by the crane to respectively realize pressure regulating work of a lifting mechanism and a walking mechanism, the lifting pressure regulating bypass 4 and the walking pressure regulating bypass 6 are in a disconnected state, and when the lifting pressure regulating main circuit 3 or the walking pressure regulating main circuit 5 breaks down.
The output ends of the lifting voltage regulating main circuit 3, the lifting voltage regulating bypass 4, the walking voltage regulating main circuit 5 and the walking voltage regulating bypass 6 are connected with the input end of the P L C controller 1 and used for feeding back the state of a circuit breaker QF and the state of a voltage regulating controller in the circuits to the P L C controller 1, the P L C controller 1 is interlocked under program conditions, and the fed-back state of the circuit breaker QF is used as one of starting conditions of the voltage regulating main circuit or the voltage regulating bypass, namely the P L C controller 1 needs to receive signals for closing the QF of the voltage regulating main circuit breaker and opening the QF of the voltage regulating bypass circuit breaker before the voltage regulating main circuit is started, and the P L C controller 1 needs to receive signals for opening the QF of the voltage regulating main circuit breaker and closing the QF of the voltage regulating bypass circuit breaker before the voltage regulating bypass voltage regulating controller is started so as to ensure safe switching.
The input end of the P L C controller 1 is connected with an operating handle and used for receiving information whether the handle is located at a zero position, and before the main voltage regulating controller or the bypass voltage regulating controller of the voltage regulating main circuit is started, the operating handle needs to be kept at the zero position to prevent misoperation.
As shown in fig. 2-3, the lifting voltage regulation main circuit 3 of the present invention includes n voltage regulation branches, each voltage regulation branch is connected in parallel, output ends of the n voltage regulation branches are respectively connected with n crane lifting mechanisms, where n is the number of the crane lifting mechanisms, each voltage regulation branch includes a voltage regulation controller 8 and two circuit breakers QF, connection modes of the voltage regulation branches are the same, an input end of the voltage regulation controller 8 is connected with an output end of the P L C controller 1 through one circuit breaker QF for receiving a P L C voltage regulation control signal, and an output end of the voltage regulation controller 8 is connected with a corresponding lifting mechanism through another circuit breaker QF for transmitting a lifting control signal to the corresponding lifting mechanism.
The circuit structure of the walking voltage regulating main circuit 5 is the same as that of the lifting voltage regulating main circuit 3, and comprises m voltage regulating branches, wherein the output ends of the m voltage regulating branches are correspondingly connected with m crane travelling mechanisms respectively and used for transmitting walking control signals to the corresponding travelling mechanisms, and therefore m is the number of the crane travelling mechanisms.
The lifting voltage-regulating bypass 4 comprises a bypass voltage-regulating controller 9 and n +1 circuit breakers QF, wherein the input end of the bypass voltage-regulating controller 9 is connected with the output end of the P L C controller 1 through one circuit breaker QF to form an input line for receiving P L C bypass voltage-regulating control signals, and the output end of the bypass voltage-regulating controller 9 is correspondingly connected with n lifting mechanisms of the crane through n circuit breakers QF to form n output lines for transmitting bypass lifting control signals to the corresponding lifting mechanisms.
The walking pressure regulating bypass 6 is identical in circuit structure with the lifting pressure regulating bypass 4, comprises a bypass pressure regulating controller 9 and m +1 circuit breakers QF, forms an input line and m output lines, and the output ends of the m output lines are respectively connected with corresponding crane walking mechanisms and used for transmitting bypass walking control signals to the corresponding walking mechanisms.
Fig. 4 is a flowchart of a control method of the pressure regulating control system of the present invention, which is performed in four steps:
firstly, voltage regulation bypass selection is carried out, when an ith branch of a voltage regulation main circuit corresponding to a crane operation mechanism breaks down and a worker receives an alarm, a bypass selection switch 2 is switched to the voltage regulation bypass, a P L C controller 1 judges that the ith branch of the voltage regulation main circuit breaks down according to a feedback signal of the voltage regulation main circuit, a P L C controller 1 controls circuit breakers QFi1 and QFi2 of the ith branch of the voltage regulation main circuit to be opened and the branch is broken, a P L C controller 1 controls a circuit breaker QFPi connected with an i # operation mechanism in the voltage regulation bypass to be closed, meanwhile, a circuit breaker QFp of the voltage regulation bypass is closed, and an output circuit of the voltage regulation bypass connected with an i # operation mechanism is connected.
Secondly, the pressure regulating bypass works, the P L C controller 1 judges whether the pressure regulating bypass meets the working conditions of the pressure regulating bypass, namely the P L C controller 1 receives feedback signals that the ith branch circuit breakers QFi1 and QFi2 of the pressure regulating main circuit are opened, the pressure regulating bypass breakers QFp and QFPi are closed, the operating handle restores the zero position, when the working conditions of the pressure regulating bypass are completely met, the P L C controller 1 inquires the storage module 7, reads bypass pressure regulating control parameters needed by the i # running mechanism and transmits the bypass pressure regulating control parameters to the pressure regulating bypass controller 9, and the pressure regulating bypass controller 9 transmits bypass control signals to the i # running mechanism through a pressure regulating bypass output line connected with the i # running mechanism to control the i # running mechanism to run.
The method comprises the steps of selecting a voltage regulating main circuit, switching a bypass selection switch 2 to the voltage regulating main circuit by a worker after the voltage regulating main circuit is cleared, judging the fault clearing of an ith branch of the voltage regulating main circuit by a P L C controller 1 according to a feedback signal of the voltage regulating main circuit, controlling a breaker QFPi connected with an i # operation mechanism in a voltage regulating bypass to be opened by the P L C controller 1, simultaneously opening a breaker QFp of the voltage regulating bypass, disconnecting a voltage regulating bypass output circuit connected with the i # operation mechanism, and controlling breakers QFi1 and QFi2 of the ith branch of the voltage regulating main circuit to be closed by the P L C controller 1, wherein the branches are communicated.
Fourthly, the main circuit of the pressure regulating side recovers work, the P L C controller 1 judges whether the condition for recovering the working condition of the ith branch of the pressure regulating main circuit is met or not, namely the P L C controller 1 receives feedback signals that the circuit breakers QFi1 and QFi2 of the ith branch of the pressure regulating main circuit are closed, the circuit breakers QFp and QFI of the pressure regulating side are opened, the operating handle recovers the zero position, when the working condition for recovering the pressure regulating main circuit is completely met, the P L C controller 1 inquires the storage module 7, reads pressure regulating control parameters needed by the i # operation mechanism and transmits the parameters to the i # pressure regulating controller 8 of the ith branch of the pressure regulating main circuit, and the i # pressure regulating controller 8 transmits control signals to the i # operation mechanism to control the i # operation mechanism to operate.
The control method is simultaneously suitable for the pressure regulating control of the hoisting mechanism or the travelling mechanism; when the method is applied to a hoisting mechanism, the running mechanism in the method is a hoisting mechanism of a crane, the pressure regulating main circuit is a hoisting pressure regulating main circuit 3, the pressure regulating bypass is a hoisting pressure regulating bypass 4, and i is more than or equal to 1 and less than or equal to n; when the method is applied to a travelling mechanism, the travelling mechanism in the method is a travelling mechanism of a crane, the voltage regulating main circuit is a travelling voltage regulating main circuit 5, the voltage regulating bypass is a travelling voltage regulating bypass 6, and i is more than or equal to 1 and less than or equal to m.
If the lifting voltage regulation main circuit 3 and the walking voltage regulation main circuit 5 have a plurality of branches which have faults simultaneously, a plurality of voltage regulation bypass output routes corresponding to the fault branches can be switched on simultaneously, because the voltage regulation bypass output routes are connected in parallel and do not interfere with each other in work, the method can be implemented by controlling each fault branch through the P L C controller 1, and the simultaneous switching and work of the voltage regulation bypasses can be completed by controlling the working logic of the voltage regulation bypasses through programs.
The present invention is not described in detail in the prior art.
Claims (7)
1. A crane voltage regulation control system sharing a bypass is characterized by comprising a P L C controller (1), a bypass selection switch (2), a lifting voltage regulation main circuit (3), a lifting voltage regulation bypass (4), a walking voltage regulation main circuit (5), a walking voltage regulation bypass (6) and a storage module (7), wherein the bypass selection switch (2) is connected with the input end of the P L C controller (1) and used for transmitting a bypass selection signal to the P L C controller (1), the storage module (7) is connected with the input end of the P L C controller (1) and used for transmitting stored voltage regulation control related parameters to the P L C controller (1), the lifting voltage regulation main circuit (3), the lifting voltage regulation bypass (4), the walking voltage regulation main circuit (5) and the walking bypass (6) are connected in parallel, the input ends of the storage module are respectively connected with the output end of the P592C controller (1) and used for receiving voltage regulation control signals, the respective output ends of the lifting main circuit (3), the lifting voltage regulation bypass (4), the walking voltage regulation main circuit (5) and the walking bypass (6) are respectively connected with the P3875C controller (1) and used for feeding back the respective input ends of the voltage regulation controllers (L);
the lifting voltage regulation main circuit (3) comprises n voltage regulation branches, the voltage regulation branches are connected in parallel, the voltage regulation branch circuits are identical in structure and respectively comprise a voltage regulation controller (8) and two circuit breakers QF, the connection modes of the voltage regulation branches are identical, the input end of the voltage regulation controller (8) is connected with the output end of a P L C controller (1) through one circuit breaker QF and is used for receiving a P L C voltage regulation control signal, and the output end of the voltage regulation controller (8) is connected with a corresponding lifting mechanism through another circuit breaker QF and is used for transmitting a lifting control signal to the corresponding lifting mechanism;
the lifting voltage-regulating bypass (4) comprises a bypass voltage-regulating controller (9) and n +1 circuit breakers QF, wherein the input end of the bypass voltage-regulating controller (9) is connected with the output end of the P L C controller (1) through one circuit breaker QF to form an input line for receiving P L C bypass voltage-regulating control signals;
in the lifting pressure regulating main circuit (3) and the lifting pressure regulating bypass (4), n is the number of lifting mechanisms of the crane.
2. The bypass-shared crane pressure regulating control system as claimed in claim 1, wherein: the circuit structure of the walking voltage regulating main circuit (5) is the same as that of the lifting voltage regulating main circuit (3), the walking voltage regulating main circuit comprises m voltage regulating branches, and the output end of each voltage regulating branch is connected with a corresponding walking mechanism and used for transmitting walking control signals to the corresponding walking mechanism; the circuit structure of the walking voltage regulating bypass (6) is the same as that of the lifting voltage regulating bypass (4), the walking voltage regulating bypass comprises a bypass voltage regulating controller (9) and m +1 circuit breakers QF to form an input line and m output lines, and the output end of each output line is connected with a corresponding walking mechanism and used for transmitting a bypass walking control signal to the corresponding walking mechanism;
in the walking pressure regulating main circuit (5) and the walking pressure regulating bypass (6), m is the number of the crane walking mechanisms.
3. The crane pressure regulating control system with the shared bypass as claimed in claim 1, wherein an input end of the P L C controller (1) is connected with an operating handle and is used for receiving information whether the operating handle is located at a zero position.
4. A method for controlling a bypass-shared crane pressure regulating control system as claimed in claim 1, wherein: comprises four steps of the following steps of,
the method comprises the steps that firstly, a voltage regulating bypass is selected, an ith branch of a voltage regulating main circuit breaks down, a bypass selection switch (2) is switched to the voltage regulating bypass, a P L C controller (1) controls the ith branch of the voltage regulating main circuit to be disconnected according to a feedback signal of the ith branch, and a P L C controller (1) controls an input circuit of the voltage regulating bypass to be connected with an output circuit of the voltage regulating bypass connected with an i # operating mechanism;
secondly, the pressure regulating bypass works, when the working conditions of the pressure regulating bypass are completely met, the P L C controller (1) reads bypass pressure regulating control parameters required by the i # running mechanism, and the P L C controller (1) controls the pressure regulating bypass controller (9) to carry out pressure regulating work of the i # running mechanism;
the main voltage regulating circuit selects, after the main voltage regulating circuit is cleared, the bypass selection switch (2) is switched to the main voltage regulating circuit, the P L C controller (1) controls the ith branch of the main voltage regulating circuit to be switched on according to the feedback signal of the ith branch of the main voltage regulating circuit, and the P L C controller (1) controls the input line of the voltage regulating bypass and the output line of the voltage regulating bypass connected with the i # operating mechanism to be switched off;
fourthly, the main voltage regulating circuit recovers work, and a P L C controller (1) reads voltage regulating control parameters required by the i # running mechanism after the main voltage regulating circuit recovers the working conditions of the main voltage regulating circuit are completely met, and the P L C controller (1) controls an ith branch voltage regulating controller (8) of the main voltage regulating circuit to regulate the voltage of the i # running mechanism;
the i # running mechanism is an i # lifting mechanism or an i # travelling mechanism; when the i # operation mechanism is an i # hoisting mechanism, the pressure regulating main circuit is a hoisting pressure regulating main circuit (3), the pressure regulating bypass is a hoisting pressure regulating bypass (4), i is more than or equal to 1 and less than or equal to n, and n is the number of hoisting mechanisms of the crane; when the i # running mechanism is an i # running mechanism, the voltage regulating main circuit is a running voltage regulating main circuit (5), the voltage regulating bypass is a running voltage regulating bypass (6), i is more than or equal to 1 and less than or equal to m, and m is the number of the running mechanisms of the crane.
5. The control method according to claim 4, wherein: the working conditions of the pressure regulating bypass include whether a faulted pressure regulating main circuit breaker QF is opened or not, whether a selected pressure regulating bypass breaker QF is closed or not and whether an operating handle restores to a zero position or not.
6. The control method according to claim 4, wherein: and the recovery voltage regulation main circuit working conditions comprise whether the selected voltage regulation bypass circuit breaker QF is opened or not, whether the fault-eliminated voltage regulation main circuit breaker QF is closed or not and whether the operating handle recovers a zero position or not.
7. The control method according to claim 4, wherein: the method is also suitable for the condition that a plurality of branches of the main voltage regulating circuit of the crane operating mechanism have faults simultaneously.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58170396A (en) * | 1982-01-19 | 1983-10-06 | ポ−タン | Device for controlling drive mechanism for imparting horizontal motion to unit to be driven |
| CN201458573U (en) * | 2009-08-14 | 2010-05-12 | 卫华集团有限公司 | Bypass control circuit on crane |
| CN201850064U (en) * | 2010-09-26 | 2011-06-01 | 鞍钢股份有限公司 | Pressure and speed-adjusting and bypass-dual control circuit of crane |
| CN205023750U (en) * | 2015-08-20 | 2016-02-10 | 攀钢集团西昌钢钒有限公司 | Hoist automatic safety device |
| CN206033046U (en) * | 2016-08-26 | 2017-03-22 | 李志刚 | Hoist frequency conversion running gear with bypass control |
| CN208279209U (en) * | 2018-04-26 | 2018-12-25 | 泰富国际工程有限公司 | A kind of safety protection circuit device of erecting equipment brake |
-
2019
- 2019-05-24 CN CN201910440466.6A patent/CN110240068B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58170396A (en) * | 1982-01-19 | 1983-10-06 | ポ−タン | Device for controlling drive mechanism for imparting horizontal motion to unit to be driven |
| CN201458573U (en) * | 2009-08-14 | 2010-05-12 | 卫华集团有限公司 | Bypass control circuit on crane |
| CN201850064U (en) * | 2010-09-26 | 2011-06-01 | 鞍钢股份有限公司 | Pressure and speed-adjusting and bypass-dual control circuit of crane |
| CN205023750U (en) * | 2015-08-20 | 2016-02-10 | 攀钢集团西昌钢钒有限公司 | Hoist automatic safety device |
| CN206033046U (en) * | 2016-08-26 | 2017-03-22 | 李志刚 | Hoist frequency conversion running gear with bypass control |
| CN208279209U (en) * | 2018-04-26 | 2018-12-25 | 泰富国际工程有限公司 | A kind of safety protection circuit device of erecting equipment brake |
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| CN110240068A (en) | 2019-09-17 |
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