Elevator control system circuit

Abstract

The invention discloses an elevator control system circuit which comprises a power supply circuit, an integrated controller and a driving circuit. The integrated controller comprises a main control circuit and a voltage stabilization conversion circuit, the input end of the power supply circuit is connected to the mains supply, the input end of the voltage stabilization conversion circuit is connected to the output end of the power supply circuit, and the first output end of the voltage stabilization conversion circuit is connected to the power supply end of the main control circuit; the driving circuit comprises a motor contactor and a star-sealing relay, the second output end of the voltage stabilization conversion circuit is connected to the input end of the motor contactor, the output end of the motor contactor is connected with the lifting motor through the star-sealing relay, and the control end of the star-sealing relay is connected to the first output end of the main control circuit. The control end of the motor contactor is connected to the third output end of the main control circuit. The elevator control system circuit solves the problem that in the prior art, due to the fact that no detection related to elevator overhaul exists in a safety loop, the safety of maintainers is low.

Description

Technical Field

[0001] The present invention relates to the field of elevator circuits, and particularly to an elevator control system circuit. Background Art

[0002] A Chinese patent discloses an elevator control system with an application number of CN202022367752.5. This elevator control system includes: a drive circuit, the drive circuit includes a power supply, an air switch QF, a phase sequence relay, a second controller, an output contactor KMY, and a main motor. The power supply is connected to the phase sequence relay and the second controller through the air switch QF. The second controller is connected to the main motor through the output contactor KMY; a safety circuit, the safety circuit includes a switch branch, an insurance branch, and a first controller. The insurance branch includes the output contactor KMY, a resistor, and a capacitor. This elevator control system removes the safety contactor arranged between the power supply and the first controller in the drive circuit, and at the same time sets the output contactor KMY between the first controller and the main motor in the insurance branch of the safety circuit.

[0003] Although this elevator control system can achieve the control of the main motor, the problems still existing in this elevator control system are: since in the safety circuit, no detection related to elevator maintenance is added, it is easy for the main motor to run during the maintenance process, and the car descends or ascends, resulting in a reduction in the safety of maintenance personnel in the pit and endangering the safety of maintenance personnel. Summary of the Invention

[0004] The present invention aims to provide an elevator control system circuit to solve the problem of low safety of maintenance personnel caused by the lack of detection related to elevator maintenance in the existing safety circuit.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention discloses an elevator control system circuit, including: a power supply circuit, an integrated controller, and a drive circuit; the integrated controller includes: a main control circuit and a voltage stabilization conversion circuit. The input end of the power supply circuit is connected to the commercial power, the input end of the voltage stabilization conversion circuit is connected to the output end of the power supply circuit, and the first output end of the voltage stabilization conversion circuit is connected to the power supply end of the main control circuit; the drive circuit includes: a motor contactor and a star connection relay. The second output end of the voltage stabilization conversion circuit is connected to the input end of the motor contactor. The output end of the motor contactor is connected to the lifting motor through the star connection relay. The control end of the star connection relay is connected to the first output end of the main control circuit, and the control end of the motor contactor is connected to the third output end of the main control circuit.

[0007] Preferably, the elevator control system circuit further includes a safety detection loop, which includes: a first series switch group, a second series switch group, a pit maintenance switch group, and an emergency control switch group; the input end of the first series switch group is connected to the third output end of the voltage stabilization conversion circuit; the pit maintenance switch group includes: a first combined control switch, a pit maintenance function switch group, and a second combined control switch. The output end of the first series switch group is connected to the input end of the first combined control switch. The first output end of the first combined control switch is connected to the first input end of the second combined control switch through the pit maintenance function switch group. The second output end of the first combined control switch is connected to the second input end of the second combined control switch through the emergency control switch group. The output end of the second combined control switch is connected to the input end of the second series switch group; the output end of the second series switch group is grounded through an external load. A first detection point is provided in the middle of the second series switch group. The first detection point is connected to the first input end of the main control circuit. The output end of the second series switch group is the second detection point, and the second detection point is connected to the second input end of the main control circuit.

[0008] Preferably, the first combined control switch includes: a first normally closed switch and a second normally closed switch. The first end of the first normally closed switch is connected to the output end of the first series switch group. The second end of the first normally closed switch is connected to the first end of the second normally closed switch and the input end of the pit maintenance function switch group. The second end of the second normally open switch is connected to the input end of the emergency control switch group.

[0009] Preferably, the second combined control switch includes: a third normally closed switch and a first normally open switch. The first end of the first normally open switch is the second input end of the second combined control switch. The second end of the first normally open switch is connected to the first end of the third normally closed switch. The first end of the third normally closed switch is the output end of the second combined control switch. The second end of the third normally open switch is the first input end of the second combined control switch.

[0010] Preferably, the pit maintenance function switch group includes: a car buffer switch, a counterweight buffer switch, a lower limit switch, an upper limit switch, an upper speed limit protection switch, a speed governor switch, a safety box switch, a safety clamp switch, and a door bypass device. The car buffer switch, the counterweight buffer switch, the lower limit switch, the upper limit switch, the upper speed limit protection switch, the speed governor switch, the safety box switch, and the safety clamp switch are connected in series in sequence. The end of the car buffer switch that is not connected to the counterweight buffer switch is the input end of the pit maintenance function switch group. The end of the safety clamp switch that is not connected to the safety box switch is connected to the first end of the door bypass device. The second end of the door bypass device is the output end of the pit maintenance function switch group.

[0011] Preferably, the first combined control switch further includes: a second normally open switch, the first end of the second normally open switch is connected to the first end of the first normally closed switch, the second end of the second normally open switch is connected to the first end of a pit maintenance up button and the first end of a pit maintenance down button, the second ends of the pit maintenance up button and the pit maintenance down button are both connected to the first end of the first normally closed switch, the first combined control switch is a relay, and the control end of the first combined control switch is connected to the second output end of the main control circuit.

[0012] Preferably, the pit maintenance function switch group further includes: a controlled pit maintenance switch, the first end of the controlled pit maintenance switch is connected to the first end of the door bypass device, the second end of the controlled pit maintenance switch is connected to the input end of the second series switch group, and the second end of the controlled pit maintenance switch is located between the input end of the second series switch group and the output end of the second combined control switch.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this application, a pit maintenance type switch group is designed in the safety detection circuit to detect the indicators that need to be detected in the pit maintenance type switch group, thereby improving the safety of pit maintenance personnel. Then, an emergency control switch group is also designed in the safety detection circuit to achieve input in an emergency situation to control the operation of the lifting motor in an emergency. Finally, by setting a first combined control switch at the connection between the input end of the pit maintenance type switch group and the input end of the emergency control switch group, and by setting a second combined control switch at the connection between the output end of the pit maintenance type switch group and the output end of the emergency control switch group, the switching use of the pit maintenance type switch group and the emergency control switch group is realized. When switching, since the number of switches in the emergency control switch group is significantly less than the number of switches in the pit maintenance function switch group, although theoretically the switch has no resistance value, in actual operation, due to long wiring, etc., there will be resistance values in the switch and the circuit. Therefore, the circuit of the pit maintenance function switch group is very long, and the resistance of the pit maintenance function switch group is significantly greater than the resistance of the emergency control switch group. Therefore, the subsequent main control circuit can distinguish whether it is pit maintenance or emergency control by detecting the voltage values at the first detection point and the second detection point.

[0015] Other advantages, objectives and features of the present invention will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0016] Figure 1 It is a circuit diagram at the drive circuit in the elevator control system circuit.

[0017] Figure 2 It is a circuit diagram at the safety monitoring circuit in the elevator control system circuit. Detailed implementation mode

[0018] In order to make the technical means, creative features, achieved purposes and functions of the present invention clearer and easier to understand, the present invention will be further described below in conjunction with the accompanying drawings and specific implementation modes:

[0019] As Figure 1 shown, the present invention discloses an elevator control system circuit, including: a power supply circuit, an integrated controller, and a drive circuit; the integrated controller includes: a main control circuit and a voltage stabilization conversion circuit. The input end of the power supply circuit is connected to the commercial power, the input end of the voltage stabilization conversion circuit is connected to the output end of the power supply circuit, and the first output end of the voltage stabilization conversion circuit is connected to the power supply end of the main control circuit; the drive circuit includes: a motor contactor and a star connection relay. The second output end of the voltage stabilization conversion circuit is connected to the input end of the motor contactor, the output end of the motor contactor is connected to the lifting motor through the star connection relay, the control end of the star connection relay is connected to the first output end of the main control circuit, and the control end of the motor contactor is connected to the third output end of the main control circuit.

[0020] As Figure 2 shown, the elevator control system circuit further includes a safety detection circuit, and the safety detection circuit includes: a first series switch group, a second series switch group, a pit maintenance type switch group, and an emergency control switch group; the input end of the first series switch group is connected to the third output end of the voltage stabilization conversion circuit; the pit maintenance type switch group includes: a first combined control switch, a pit maintenance function switch group, and a second combined control switch. The output end of the first series switch group is connected to the input end of the first combined control switch. The first output end of the first combined control switch is connected to the first input end of the second combined control switch through the pit maintenance function switch group. The second output end of the first combined control switch is connected to the second input end of the second combined control switch through the emergency control switch group. The output end of the second combined control switch is connected to the input end of the second series switch group; the output end of the second series switch group is grounded through an external load. A first detection point is provided in the middle of the second series switch group. The first detection point is connected to the first input end of the main control circuit. The output end of the second series switch group is a second detection point, and the second detection point is connected to the second input end of the main control circuit.

[0021] The first series switch group includes: a control cabinet stop switch STP, a host side stop switch STM, a handwheel switch STV, a pit entrance stop switch STL1, and a pit ladder switch SSPT. The control cabinet stop switch STP, the host side stop switch STM, and the handwheel switch STV are connected in series. Of course, other switches can also be included in series to form the first series switch group.

[0022] The first combined control switch includes: a first normally-closed switch SW1 and a second normally-closed switch SW2. The first end of the first normally-closed switch SW1 is connected to the output end of the first series switch group. The second end of the first normally-closed switch SW1 is connected to the first end of the second normally-closed switch SW2 and the input end of the pit maintenance function switch group. The second end of the second normally-open switch is connected to the input end of the emergency control switch group.

[0023] The second combined control switch includes: a third normally-closed switch SW3 and a first normally-open switch SW4. The first end of the first normally-open switch SW4 is the second input end of the second combined control switch. The second end of the first normally-open switch SW4 is connected to the first end of the third normally-closed switch SW3. The first end of the third normally-closed switch SW3 is the output end of the second combined control switch. The second end of the third normally-open switch is the first input end of the second combined control switch.

[0024] When there is no pit maintenance, the first normally-closed switch SW1 and the second normally-closed switch SW2 are both in the closed state. At this time, there is voltage at the end of the branch where the emergency control switch group (the emergency control switch group includes: the emergency electric operation switch SBPR, the control cabinet up switch SBPU, and the control cabinet down switch SBPD. The emergency electric operation switch SBPR, the control cabinet up switch SBPU, and the control cabinet down switch SBPD are connected in series to form the emergency control switch group) is located. At the same time, the second combined control switch switches to the state where the first normally-open switch SW4 is closed and the third normally-closed switch SW3 is open. In this way, when emergency braking is required during normal use, as long as the emergency electric operation switch SBPR and the control cabinet up switch SBPU in the emergency control switch group are pressed and closed, and the adjustment emergency control switch group is connected, voltage changes can be detected from the first detection point and the second detection point to monitor the operation and achieve emergency control. When pit maintenance is required, the first normally-closed switch SW1 and the second normally-closed switch SW2 are both in the open state. At this time, there is no voltage at the end of the branch where the emergency control switch group is located (even if the emergency control switch group is pressed, it cannot input a command, avoiding the emergency control switch group being pressed during pit maintenance, improving the safety of pit maintenance). At the same time, the second combined control switch switches to the state where the first normally-open switch SW4 is open and the third normally-closed switch SW3 is closed. In this way, before the maintenance work starts, as long as the pit maintenance up button PCIU or the pit maintenance down button PCID is closed and the pit maintenance function switch group is connected, voltage changes can be detected from the first detection point and the second detection point to achieve the pit maintenance control mode. The second combined control switch and the first combined control switch can be switches in a relay, so that combined control can be achieved, enabling the combined switching of emergency control and pit maintenance control under normal circumstances, making the control more convenient.

[0025] The pit maintenance function switch group includes: car buffer switch SSCB, counterweight buffer switch SSBB, lower limit switch SLDL, upper limit switch SLUL, overspeed protection switch SSOS for upward travel, speed limiter switch SSLS, safety box switch SSHE, safety gear switch SSAN, and door bypass device PAL. The car buffer switch SSCB, counterweight buffer switch SSBB, lower limit switch SLDL, upper limit switch SLUL, overspeed protection switch SSOS for upward travel, speed limiter switch SSLS, safety box switch SSHE, and safety gear switch SSAN are connected in series in sequence. The end of the car buffer switch SSCB that is not connected to the counterweight buffer switch SSBB is the input end of the pit maintenance function switch group. The end of the safety gear switch SSAN that is not connected to the safety box switch SSHE is connected to the first end of the door bypass device PAL. The second end of the door bypass device PAL is the output end of the pit maintenance function switch group.

[0026] The first combined control switch further includes: a second normally open switch SW5. The first end of the second normally open switch SW5 is connected to the first end of the first normally closed switch SW1. The second end of the second normally open switch SW5 is connected to the first ends of a pit maintenance up button PCIU and a pit maintenance down button PCID. The second ends of the pit maintenance up button PCIU and the pit maintenance down button PCID are both connected to the first end of the first normally closed switch SW1. The first combined control switch is a relay, and the control end of the first combined control switch is connected to the second output end of the main control circuit.

[0027] The pit maintenance function switch group further includes: a controlled pit maintenance switch SSCT. The first end of the controlled pit maintenance switch SSCT is connected to the first end of the door bypass device PAL. The second end of the controlled pit maintenance switch SSCT is connected to the input end of the second series switch group, and the second end of the controlled pit maintenance switch SSCT is located between the input end of the second series switch group and the output end of the second combined control switch. After the controlled pit maintenance switch SSCT is set, when the third normally closed switch SW3 and the door bypass device PAL are open-circuited, pressing this controlled pit maintenance switch SSCT can avoid the interference of the third normally closed switch SW3 and the door bypass device PAL to the pit maintenance work.

[0028] The second series switch group includes: a rear door second emergency stop switch STT1, a leveling plug switch SPC, a front door car door lock SMC1, and a rear door lock SMC2. The rear door second emergency stop switch STT1, the leveling plug switch SPC, the front door car door lock SMC1, and the rear door lock SMC2 are connected in series to form the second series switch group. Of course, other switches can also be connected in series in the second series switch group.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. Elevator control system circuit, characterized in that, include: Power supply circuit, integrated controller and drive circuit; The integrated controller includes: a main control circuit and a voltage stabilizing conversion circuit, the input end of the power supply circuit is connected to the mains, the input end of the voltage stabilizing conversion circuit is connected to the output end of the power supply circuit, and the first output end of the voltage stabilizing conversion circuit is connected to the power supply end of the main control circuit; The driving circuit includes: a motor contactor and a star-sealing relay. The second output end of the voltage stabilizing conversion circuit is connected to the input end of the motor contactor. The output end of the motor contactor is connected to the lifting motor through the star-sealing relay. The control end of the star-sealing relay is connected to the first output end of the main control circuit. The control end of the motor contactor is connected to the third output end of the main control circuit.

2. The elevator control system circuit according to claim 1, characterized in that: It also includes a safety detection circuit, which includes: a first series switch group, a second series switch group, a pit maintenance switch group, and an emergency control switch group; The input end of the first series switch group is connected to the third output end of the voltage stabilizing conversion circuit; The pit maintenance switch group includes: a first joint control switch, a pit maintenance function switch group and a second joint control switch, the output end of the first series switch group is connected to the input end of the first joint control switch, the first output end of the first joint control switch is connected to the first input end of the second joint control switch through the pit maintenance function switch group, the second output end of the first joint control switch is connected to the second input end of the second joint control switch through the emergency control switch group, and the output end of the second joint control switch is connected to the input end of the second series switch group; The output end of the second series switch group is grounded through an external load. A first detection point is set in the middle of the second series switch group, and the first detection point is connected to the first input end of the main control circuit. The output end of the second series switch group is the second detection point, and the second detection point is connected to the second input end of the main control circuit.

3. The elevator control system circuit according to claim 2, characterized in that: The first combined control switch includes: a first normally closed switch and a second normally closed switch, the first end of the first normally closed switch is connected to the output end of the first series switch group, the second end of the first normally closed switch is connected to the first end of the second normally closed switch and the input end of the pit maintenance function switch group, and the second end of the second normally open switch is connected to the input end of the emergency control switch group.

4. The elevator control system circuit according to claim 3, characterized in that: The second joint control switch includes: a third normally closed switch and a first normally open switch, the first end of the first normally open switch is the second input end of the second joint control switch, the second end of the first normally open switch is connected to the first end of the third normally closed switch, the first end of the third normally closed switch is the output end of the second joint control switch, and the second end of the third normally open switch is the first input end of the second joint control switch.

5. The elevator control system circuit according to claim 4, characterized in that: The pit maintenance function switch group includes: a car buffer switch, a counterweight buffer switch, a lower limit switch, an upper limit switch, an upper speed limit protection switch, a speed limiter switch, a safety box switch, a safety clamp switch and a door bypass device. The car buffer switch, the counterweight buffer switch, the lower limit switch, the upper limit switch, the upper speed limit protection switch, the speed limiter switch, the safety box switch and the safety clamp switch are connected in series in sequence. The end of the car buffer switch that is not connected to the counterweight buffer switch is the input end of the pit maintenance function switch group, the safety clamp switch that is not connected to the safety box switch is connected to the first end of the door bypass device, and the second end of the door bypass device is the output end of the pit maintenance function switch group.

6. The elevator control system circuit according to claim 5, characterized in that: The first combined control switch also includes: a second normally open switch, a first end of the second normally open switch is connected to the first end of the first normally closed switch, a second end of the second normally open switch is connected to the first end of a pit maintenance upper button and the first end of a pit maintenance lower button, a second end of the pit maintenance upper button and a second end of the pit maintenance lower button are both connected to the first end of the first normally closed switch, the first combined control switch is a relay, and a control end of the first combined control switch is connected to the second output end of the main control circuit.

7. The elevator control system circuit according to claim 6, characterized in that: The pit maintenance function switch group also includes: a controlled pit maintenance switch, the first end of the controlled pit maintenance switch is connected to the first end of the door bypass device, the second end of the controlled pit maintenance switch is connected to the input end of the second series switch group, and the second end of the controlled pit maintenance switch is located between the input end of the second series switch group and the output end of the second joint control switch.

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