CN212503671U - Bridge crane's unmanned on duty automatic control circuit - Google Patents
Bridge crane's unmanned on duty automatic control circuit Download PDFInfo
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- CN212503671U CN212503671U CN202021227251.0U CN202021227251U CN212503671U CN 212503671 U CN212503671 U CN 212503671U CN 202021227251 U CN202021227251 U CN 202021227251U CN 212503671 U CN212503671 U CN 212503671U
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Abstract
The utility model relates to a bridge crane's unmanned on duty automatic control circuit, place platform, laser detection module, main power supply line, start relay, main voltage sensor, emergency power supply branch road, power switching relay and controller including article, article are placed the bench and are distributed and be provided with two at least weighing transducer, and laser detection module includes laser emitter and laser receiver, and main power supply line realizes bridge crane's main power supply, and emergency power supply branch road and emergency power supply realize bridge crane's emergency power supply. Whether article to be transported have been placed on can reliably detecting article effectively through weighing sensor and laser detection module and placing the bench, realize the automatic control of bridge crane's start-up according to detected signal, need not the staff and start the operation, realize unmanned on duty to a certain extent, moreover, whether unusual according to main power supply, whether control emergency power supply drops into, guarantees bridge crane's reliable power supply.
Description
Technical Field
The utility model relates to a bridge crane's unmanned on duty automatic control circuit.
Background
The bridge crane is a hoisting device which is transversely arranged above workshops, warehouses and stockyards to hoist materials. The two ends of the crane are located on a high cement column or a metal bracket, and the shape of the crane is similar to a bridge, so the crane is a bridge crane. The bridge frame of the bridge crane runs longitudinally along the rails laid on the elevated frames at two sides, so that the space below the bridge frame can be fully utilized to hoist materials without being hindered by ground equipment. The bridge crane is the hoisting machinery with the widest application range and the largest quantity. At present, when the bridge crane is controlled, particularly when the bridge crane is started to be controlled, a worker needs to specially walk to an operation table, then the bridge crane is started by operating a starting button, the automation degree is low, and a complex working process is brought to the operator.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a bridge crane's unmanned on duty automatic control circuit for solve current bridge crane's the control mode's degree of automation problem than low.
In order to solve the problem, the utility model adopts the following technical scheme:
an unattended automatic control circuit of a bridge crane, comprising:
the article placing table is provided with at least two weight sensors in a distributed manner;
the laser detection module comprises a laser transmitter and a laser receiver, and a light path between the laser transmitter and the laser receiver passes through the upper area of the article placing table;
the electric energy output end of the main power supply circuit is used for supplying power and connecting the bridge crane;
a start relay including a start control coil and a start contact switch, the start contact switch being arranged in series on the main power supply line;
a main voltage sensor for detecting a voltage of the main power supply;
an emergency power supply;
the power supply system comprises an emergency power supply branch, a main power supply line and a main power supply line, wherein the power input end of the emergency power supply branch is connected with an emergency power supply, and the power output end of the emergency power supply branch is connected with the power output end of the main power supply line;
the emergency power supply system comprises a power supply switching relay, a power supply switching control circuit and an emergency contact switch, wherein the emergency contact switch is arranged on an emergency power supply branch in series; and
and the signal output ends of the weight sensor, the laser receiver and the main voltage sensor are connected with the signal input end of the controller, and the signal output end of the controller is connected with the starting control coil and the switching control coil.
Further, bridge crane's unmanned on duty automatic control circuit still includes:
the power supply indicating relay comprises a power supply indicating control coil, a normally open contact switch and a normally closed contact switch, and the signal output end of the controller is connected with the power supply indicating control coil;
the main power supply indicating circuit is provided with the normally open contact switch and a main power supply indicating lamp in series; and
the emergency power supply indicating circuit is provided with the normally closed contact switch and the emergency power supply indicating lamp in series.
Further, bridge crane's unmanned on duty automatic control circuit still includes:
the first limit sensor is arranged at two ends of an end beam of the bridge crane;
the second limit sensors are arranged at two ends of a main beam of the bridge crane;
the first current sensor is arranged in a driving motor in a cart running mechanism of the bridge crane to detect the power supply current of the driving motor in the cart running mechanism; and
the second current sensor is arranged in a driving motor in a trolley running mechanism of the bridge crane to detect the power supply current of the driving motor in the trolley running mechanism;
and the signal output ends of the first limit sensor, the second limit sensor, the first current sensor and the second current sensor are connected with the signal input end of the controller.
Furthermore, bridge crane's unmanned on duty automatic control circuit still includes human infrared sensor, human infrared sensor is used for detecting with the human infrared information of the preset within range of platform is placed as the center to the article, human infrared sensor's signal output part connects the signal input part of controller.
Furthermore, the unattended automatic control circuit of the bridge crane further comprises a first brake and a second brake, the first brake is arranged in the cart running mechanism, the second brake is arranged in the trolley running mechanism, and the signal output end of the controller is connected with the first brake and the second brake.
Furthermore, the unattended automatic control circuit of the bridge crane further comprises an alarm, and the signal output end of the controller is connected with the alarm.
The utility model has the advantages that: the automatic control circuit of the bridge crane can detect whether an article to be transported is placed on the article placing table or not according to the weight sensors distributed on the article placing table, and detect whether the article to be transported is placed on the article placing table or not according to whether the laser receiver receives laser emitted by the laser emitter or not, therefore, whether the article to be transported is placed on the article placing table or not can be reliably and effectively detected through the weight sensors and the laser detection modules, when a controller receives a detection signal which is output by the weight sensors and the laser detection modules and used for placing the article to be transported on the article placing table, the power of the starting control coil is controlled to be on, the starting contact switch is conducted, the main power supply line is conducted to supply power to the bridge crane, and the bridge crane is started, therefore, the unattended automatic control circuit of the bridge crane can control the bridge crane to be started according, the automatic control is realized, the starting operation by workers is not needed, the complexity of the working process of the operators is reduced, and the unattended operation is realized to a certain extent; and the main voltage sensor detects the voltage of the main power supply to judge whether the main power supply normally supplies power, when the power supply is abnormal, the controller automatically controls to start the emergency power supply, so that the automatic switching of the power supply of the bridge crane is realized, the reliable power supply of the bridge crane is ensured, and the automatic power supply control of the bridge crane is realized.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described as follows:
FIG. 1 is a schematic view of the overall structure of an article placement station and a laser inspection module;
FIG. 2 is a circuit diagram of a main power supply line and an emergency power supply branch;
FIG. 3 is a control schematic diagram of an unattended automatic control circuit of a bridge crane;
fig. 4 is a power supply indicating circuit diagram.
Detailed Description
The embodiment provides a bridge crane's unmanned on duty automatic control circuit, and bridge crane that this bridge crane's unmanned on duty automatic control circuit was suitable for includes end beam, girder and other mechanical part, and other mechanical part include hoisting mechanism, dolly operating device and cart operating device. The cart running mechanism is used for driving the main beam to do reciprocating linear motion along the end beam, and the trolley running mechanism is used for driving the lifting mechanism to do reciprocating linear motion along the main beam. The bridge crane belongs to the most common existing crane, and the positions and the assembly relationship among the end beam, the main beam, the lifting mechanism, the trolley running mechanism and the cart running mechanism are not repeated.
The unattended automatic control circuit of the bridge crane comprises an article placing table 1, a laser detection module, a main power supply line 7, a starting relay, a main voltage sensor 10, an emergency power supply 11, an emergency power supply branch 12, a power supply switching relay and a controller 16.
The article placing table 1 is used for placing an article to be transported, so that the bridge crane can transport the article to be transported on the article placing table 1 to other positions. It should be understood that the articles to be transported may be placed on the article placement table 1 by a human or other handling device. The shape, size and table height of the article placing table 1 are set according to actual needs, as shown in fig. 1, a specific embodiment of the article placing table 1 is given, the article placing table 1 is a cylindrical structure, and the cylindrical upper surface is the table of the article placing table 1 and is used for placing articles to be transported. At least two weight sensors 2 are distributed on the article placing table 1, wherein the number of the weight sensors 2 is set by actual needs, and the more the number of the weight sensors 2 is, the more accurate the detection is. The position of each weight sensor 2 on the article placement table 1 is set by actual needs, and it is understood that each weight sensor 2 is disposed at a different position on the article placement table 1. The weight sensor 2 may be a conventional weight detecting device. Then, when the article to be transported is placed on the article placing table 1, the at least one weight sensor 2 detects a weight signal; when the article to be transported is not placed on the article placing table 1, all the weight sensors 2 do not detect a weight signal. Therefore, whether or not the article to be transported is placed on the article placing table 1 is determined by whether or not the weight sensor 2 detects a weight signal.
The laser detection module comprises a laser transmitter 3 and a laser receiver 4, wherein the laser transmitter 3 is used for transmitting laser, and the laser receiver 4 is used for receiving the laser transmitted by the laser transmitter 3. The laser transmitter 3 and the laser receiver 4 form a light path therebetween, which passes through the upper region of the article placement table 1. It should be understood that the laser transmitter 3 and the laser receiver 4 may be at the same height or may be disposed at different heights, and in this embodiment, the laser transmitter 3 and the laser receiver 4 are at the same height, and the light path intersects with the axis of the article placing table 1. In addition, the installation height of the laser transmitter 3 and the laser receiver 4 is determined by the height of the top of the article placing table 1, and in this embodiment, the height of the laser transmitter 3 can be fixed and adjusted by the first adjusting lever 5, and the height of the laser receiver 4 can be fixed and adjusted by the second adjusting lever 6. Then, when the article to be transported is placed on the article placing table 1, the light path is blocked, and the laser receiver 4 cannot receive the laser emitted by the laser emitter 3; when the article to be transported is not placed on the article placing table 1, the light path is not blocked, and the laser receiver 4 can receive the laser emitted by the laser emitter 3. Therefore, it is determined whether or not the article to be transported is placed on the article placing table 1 by detecting whether or not the laser receiver 4 receives the laser signal.
As shown in fig. 2, the electric energy input end of the main power supply line 7 is connected with the main power supply 8, and the electric energy output end of the main power supply line 7 is used for supplying power and connecting with the bridge crane. The main power supply 8 is usually three-phase ac power, so the main power supply 8 can be understood as a three-phase ac power interface, and accordingly the main power supply line 7 is essentially three single-phase lines. A main voltage sensor 10 is used to detect the voltage of the main power supply 8, and the main voltage sensor 10 may be a conventional ac voltage sensor.
The starting relay comprises a starting control coil 14 and a starting contact switch 9, and the starting contact switch 9 is arranged on the main power supply line 7 in series. Since the main power supply line 7 is essentially three single-phase lines, the start contact switch 9 is then three single-phase contact switches. In this embodiment, the starting contact switch 9 is a normally open contact switch.
The electric energy input end of the emergency power supply branch 12 is connected with the emergency power supply 11, and the electric energy output end of the emergency power supply branch 12 is connected with the electric energy output end of the main power supply line 7. The emergency power source 11 may be a conventional ac power source (further, an ac UPS power source), or a dc power source (further, a dc UPS power source) with an inverter. The emergency power supply branch 12 is similar to the main power supply line 7 and is also three single-phase lines.
The power supply switching relay comprises a switching control coil 15 and an emergency contact switch 13, and the emergency contact switch 13 is arranged on the emergency power supply branch 12 in series. Since the emergency power branch 12 is essentially three single-phase lines, the emergency contact switch 13 is then three single-phase contact switches. In this embodiment, the emergency contact switch 13 is a normally open contact switch.
As shown in fig. 3, signal output terminals of the weight sensor 2, the laser receiver 4 and the main voltage sensor 10 are connected to a signal input terminal of a controller 16, and signal output terminals of the controller 16 are connected to the start control coil 14 and the switching control coil 15. The controller 16 is a control core of an unattended automatic control circuit of the bridge crane, and may be a conventional control chip, such as a single chip microcomputer or a PLC, or a conventional control host. The specific model can be flexibly set according to actual requirements regardless of a control chip or a control host. It should be understood that the power supply of the controller 16 may be supplied by a dedicated energy storage system, or may be supplied by a dedicated dc power supply, so as to ensure control reliability and stability.
In this embodiment, in order to display the power supply state of the main power supply 8 or the emergency power supply 11, the unattended automatic control circuit of the bridge crane further includes a power supply indication relay, a main power supply indication circuit 20, a main power supply indication lamp 21, an emergency power supply indication circuit 22, and an emergency power supply indication lamp 23. The power supply indicating relay comprises a power supply indicating control coil 17, a normally open contact switch 18 and a normally closed contact switch 19, and the signal output end of the controller 16 is connected with the power supply indicating control coil 17. It should be understood that the technical means for connecting the signal output end of the controller 16 to the control coil of each relay is specifically as follows: the signal output terminal of the controller 16 is connected to one end of the control coil of each relay, and the other end of the control coil of each relay is grounded.
As shown in fig. 4, the normally open contact switch 18 and the main power supply indicator lamp 21 are provided in series in the main power supply indication circuit 20, and the normally closed contact switch 19 and the emergency power supply indicator lamp 23 are provided in series in the emergency power supply indication circuit 22. It should be understood that the power supplies of the main power indication loop 20 and the emergency power indication loop 22, i.e. the power supply + in fig. 4, may be output by the controller 16, and further, the power supply + and the start control coil 14 are connected to the same output pin of the controller 16, so that when the controller 16 controls the start control coil 14 to be powered, the power supplies of the main power indication loop 20 and the emergency power indication loop 22 are powered.
In this embodiment, the unattended automatic control circuit of the bridge crane further includes a first limit sensor 24, a second limit sensor 25, a first current sensor 26, and a second current sensor 27. The first limit sensor 24 is disposed at two ends of an end beam of the bridge crane, and is configured to detect whether the main beam moves to an extreme limit position. The second limit sensor 25 is used for being arranged at two ends of a main beam of the bridge crane and used for detecting whether the hoisting mechanism moves to an extreme limit position. It should be understood that the limit sensors arranged at the two ends of the end beam and the main beam belong to the conventional technical means, and are not described in detail.
The cart running mechanism and the trolley running mechanism are both driven by a driving motor, and then, in order to acquire the running state of the driving motor in real time, the first current sensor 26 is arranged in the driving motor in the cart running mechanism to detect the power supply current of the driving motor in the cart running mechanism. The second current sensor 27 is provided in the drive motor in the carriage travel mechanism to detect the supply current of the drive motor in the carriage travel mechanism. The first and second current sensors 26 and 27 may be provided on a power supply line of the corresponding drive motor, and each of the first and second current sensors 26 and 27 may be a conventional current detection device for detecting a motor current.
As shown in fig. 3, the signal outputs of the first limit sensor 24, the second limit sensor 25, the first current sensor 26 and the second current sensor 27 are connected to the signal input of the controller 16.
In this embodiment, the unattended automatic control circuit of the bridge crane further includes a human infrared sensor 28, the human infrared sensor 28 is configured to detect human infrared information within a preset range centered on the article placement table 1, and a signal output end of the human infrared sensor 28 is connected to a signal input end of the controller 16. The human infrared sensor 28 may be a conventional 360 degree human infrared detection device.
In this embodiment, in order to ensure the safe operation, the unattended automatic control circuit of the bridge crane further comprises a first brake 29 and a second brake 30, the first brake 29 is arranged in the cart running mechanism and used for braking the cart running mechanism, the second brake 30 is arranged in the trolley running mechanism and used for braking the trolley running mechanism, and the signal output end of the controller 16 is connected with the first brake 29 and the second brake 30.
In this embodiment, in order to realize the alarm, the unattended automatic control circuit of the bridge crane further includes an alarm 31, the alarm 31 may be a conventional audible and visual alarm, and the signal output end of the controller 16 is connected to the alarm 31.
When the article placing table 1 is not used for placing articles to be transported, all the weight sensors 2 cannot detect weight signals, and the laser receiver 4 receives laser emitted by the laser emitter 3, then the controller 16 cannot receive the weight signals transmitted by any one of the weight sensors 2, and receives the laser signals transmitted by the laser receiver 4, then the controller 16 controls the starting control coil 14 to lose power, the starting contact switch 9 is disconnected, the main power supply line 7 is disconnected, and the bridge crane cannot be started because the bridge crane cannot be powered on; when the article placing table 1 is used for placing articles to be transported, at least one weight sensor 2 detects a weight signal, and the laser receiver 4 cannot receive laser emitted by the laser emitter 3, so that the controller 16 receives the weight signal transmitted by at least one weight sensor 2 and cannot receive the laser signal transmitted by the laser receiver 4, the controller 16 controls the starting control coil 14 to be powered on, the starting contact switch 9 is switched on, the main power supply line 7 is switched on, and the bridge crane is powered on to be started. In fig. 4, the power supply sources of the main power supply instruction circuit 20 and the emergency power supply instruction circuit 22 are powered on. Meanwhile, the controller 16 controls the power supply indication control coil 17 to be electrified, the normally open contact switch 18 is closed, and the main power supply indicator lamp 21 is electrified and lightened.
In the operation process of the bridge crane, the main voltage sensor 10 detects the voltage of the main power supply 8 in real time, when a voltage signal detected by the main voltage sensor 10 is lower than a preset value, the main power supply 8 is indicated to be abnormal, the controller 16 controls the starting control coil 14 to lose power, the starting contact switch 9 is switched off, meanwhile, the switching control coil 15 is controlled to be powered on, the emergency contact switch 13 is switched on, then the bridge crane is switched to the emergency power supply 11 from the main power supply 8, and the bridge crane is ensured to continuously and normally operate. Meanwhile, the controller 16 controls the power supply indication control coil 17 to lose power, the normally closed contact switch 19 is closed, and the emergency power supply indicator lamp 23 is powered on and is lightened.
In the operation process of the bridge crane, the controller 16 receives detection signals of the first limit sensor 24, the second limit sensor 25, the first current sensor 26 and the second current sensor 27, when at least one signal is abnormal, the controller 16 controls the starting control coil 14 and the switching control coil 15 to lose power, the starting contact switch 9 and the emergency contact switch 13 are both switched off, the main power supply 8 and the emergency power supply 11 can not supply power for the bridge crane, and the bridge crane stops. Further, the first brake 29 and the second brake 30 can be controlled to brake, and the alarm 31 can be controlled to alarm.
In the operation process of the bridge crane, if the human infrared sensor 28 detects that human infrared information exists in a preset range taking the article placing table 1 as a center, the fact that a person is close to the article placing table 1 is indicated, in order to guarantee safety, the controller 16 controls the starting control coil 14 and the switching control coil 15 to lose power, the starting contact switch 9 and the emergency contact switch 13 are both switched off, the main power supply 8 and the emergency power supply 11 cannot supply power for the bridge crane, and the bridge crane is stopped. Further, the first brake 29 and the second brake 30 can be controlled to brake, and the alarm 31 can be controlled to alarm.
It should be understood that the present embodiment protects the hardware structure of the unattended automatic control circuit of the bridge crane, the control strategy in the controller 16 is a conventional strategy, the unattended automatic control circuit of the bridge crane is controlled only by using the existing control strategy, the unattended automatic control circuit of the bridge crane is not limited by the control strategy, and other control strategies disclosed in the prior art can be adopted besides the control strategy described above.
Claims (6)
1. An unattended automatic control circuit of a bridge crane, comprising:
the article placing table is provided with at least two weight sensors in a distributed manner;
the laser detection module comprises a laser transmitter and a laser receiver, and a light path between the laser transmitter and the laser receiver passes through the upper area of the article placing table;
the electric energy output end of the main power supply circuit is used for supplying power and connecting the bridge crane;
a start relay including a start control coil and a start contact switch, the start contact switch being arranged in series on the main power supply line;
a main voltage sensor for detecting a voltage of the main power supply;
an emergency power supply;
the power supply system comprises an emergency power supply branch, a main power supply line and a main power supply line, wherein the power input end of the emergency power supply branch is connected with an emergency power supply, and the power output end of the emergency power supply branch is connected with the power output end of the main power supply line;
the emergency power supply system comprises a power supply switching relay, a power supply switching control circuit and an emergency contact switch, wherein the emergency contact switch is arranged on an emergency power supply branch in series; and
and the signal output ends of the weight sensor, the laser receiver and the main voltage sensor are connected with the signal input end of the controller, and the signal output end of the controller is connected with the starting control coil and the switching control coil.
2. The unattended automatic control circuit of a bridge crane according to claim 1, further comprising:
the power supply indicating relay comprises a power supply indicating control coil, a normally open contact switch and a normally closed contact switch, and the signal output end of the controller is connected with the power supply indicating control coil;
the main power supply indicating circuit is provided with the normally open contact switch and a main power supply indicating lamp in series; and
the emergency power supply indicating circuit is provided with the normally closed contact switch and the emergency power supply indicating lamp in series.
3. The unattended automatic control circuit of a bridge crane according to claim 1, further comprising:
the first limit sensor is arranged at two ends of an end beam of the bridge crane;
the second limit sensors are arranged at two ends of a main beam of the bridge crane;
the first current sensor is arranged in a driving motor in a cart running mechanism of the bridge crane to detect the power supply current of the driving motor in the cart running mechanism; and
the second current sensor is arranged in a driving motor in a trolley running mechanism of the bridge crane to detect the power supply current of the driving motor in the trolley running mechanism;
and the signal output ends of the first limit sensor, the second limit sensor, the first current sensor and the second current sensor are connected with the signal input end of the controller.
4. The unattended automatic control circuit of the bridge crane according to claim 1, further comprising a human body infrared sensor, wherein the human body infrared sensor is used for detecting human body infrared information within a preset range centering on the article placing table, and a signal output end of the human body infrared sensor is connected with a signal input end of the controller.
5. The unattended automatic control circuit of a bridge crane according to claim 1, further comprising a first brake and a second brake, wherein the first brake is disposed in the cart running mechanism, the second brake is disposed in the cart running mechanism, and a signal output end of the controller is connected to the first brake and the second brake.
6. The unattended automatic control circuit of the bridge crane according to claim 1, wherein the unattended automatic control circuit of the bridge crane further comprises an alarm, and a signal output end of the controller is connected with the alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021227251.0U CN212503671U (en) | 2020-06-29 | 2020-06-29 | Bridge crane's unmanned on duty automatic control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021227251.0U CN212503671U (en) | 2020-06-29 | 2020-06-29 | Bridge crane's unmanned on duty automatic control circuit |
Publications (1)
| Publication Number | Publication Date |
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| CN212503671U true CN212503671U (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021227251.0U Active CN212503671U (en) | 2020-06-29 | 2020-06-29 | Bridge crane's unmanned on duty automatic control circuit |
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| CN (1) | CN212503671U (en) |
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- 2020-06-29 CN CN202021227251.0U patent/CN212503671U/en active Active
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