Power failure protection device of construction hoist and construction hoist with power failure protection device

Abstract

The utility model discloses a building hoist power failure protection device and a building hoist with the same. The power failure protection device for the construction hoist comprises a standby power supply circuit and a first controller, wherein the standby power supply circuit is connected with a power supply line of a brake and is arranged in parallel with a main power supply circuit; and the first controller is connected with the standby power supply circuit and is used for controlling the standby power supply circuit to be intermittently conducted under the condition that the main power supply circuit is powered off, so that the cage is in an intermittent braking state. Thus, under the condition that the main power supply circuit of the brake is abnormally powered off, based on the cooperation of the first controller and the standby power supply circuit, the suspension cage slowly slides down in the intermittent braking state of the brake, then the suspension cage is stably parked on the standard floor, drivers, passengers and goods can conveniently and safely enter and exit, and the safety of the suspension cage is improved. And the operation safety of the construction hoist can be improved.

Description

Technical Field

[0001] The utility model relates to the field of construction elevators, in particular to a power failure protection device for a construction elevator and a construction elevator with the same. Background Art

[0002] As equipment used for vertical transportation in the construction field, the main function of a construction elevator is to transport construction workers and materials to buildings under construction. A construction elevator is mainly composed of a cage and several standard sections. Each standard section is of a fixed length. Several standard sections are fixed together and installed on the ground. Wall attachment devices are provided at different heights so that the standard sections are attached to the building to form a track. The standard sections are also equipped with racks. A transmission mechanism with an output gear is provided on the cage. The cage is fixed to the standard section through rollers, and the transmission output gear on the cage is fully engaged with the rack of the standard section. When the transmission mechanism of the construction elevator is running, it will drive the cage of the construction elevator to move up and down along the standard section.

[0003] The transmission mechanism of a construction elevator is generally composed of an electric motor, a reducer, and an output pinion. The output pinion meshes with the gear on the standard section. Multiple sets of transmission mechanisms are installed in parallel on the transmission plate, and the transmission plate is fixed to the cage. When the motor of each set of transmission mechanisms is energized, the output pinions meshing on the rack of the standard section rotate, thereby driving the cage of the construction elevator to move up and down along the standard section.

[0004] In order to achieve stable parking of the cage of the construction elevator, the construction elevator is also equipped with an electromagnetic brake, which is mostly installed at the tail of the motor. When the control system gives a stop command, the motor will not be powered, and at the same time, the electromagnetic brake signal will be output to stop the entire cage at the standard section. Generally, the cage is docked at the standard floor of the building to facilitate the entry and exit of people and goods. However, when a power outage occurs in the system, the cage will stop running abnormally, but it is often not docked at the standard floor of the building. At this time, the people and goods in the cage can only stop in mid-air and wait for a call or rescue. Especially when the construction elevator is installed in a long-distance single-floor docking scene such as a bridge pier or chimney, a sudden power outage and the cage docking in mid-air for a long time will bring relatively large unknown risks. Summary of the invention

[0005] In view of this, an embodiment of the utility model provides a construction elevator power failure protection device and a construction elevator having the same, which aims to control the cage to stably stop at a standard floor in the event of an abnormal power failure.

[0006] The technical solution of the utility model embodiment is achieved as follows:

[0007] In a first aspect, an embodiment of the present application provides a power failure protection device for a construction elevator, wherein the construction elevator comprises a lifting drive mechanism for driving a cage to move up and down along a standard section and a brake for braking the cage, wherein a power supply line of the brake is connected to a main power supply circuit of the brake, and the brake switches an operating state based on a startup state of the main power supply circuit, and the power failure protection device comprises:

[0008] A backup power supply circuit, connected to the power supply line of the brake and arranged in parallel with the main power supply circuit;

[0009] The first controller is connected to the backup power supply circuit and is used to control the intermittent conduction of the backup power supply circuit when the main power supply circuit is powered off, so that the cage is in an intermittent braking state.

[0010] In the above scheme, the backup power supply circuit includes:

[0011] Energy storage unit;

[0012] A power conversion circuit, connected to the power supply line of the energy storage unit and the brake, for converting the electric energy of the energy storage unit and supplying power to the brake;

[0013] Wherein, the first controller is connected to the control end of the power conversion circuit, and is used to control the intermittent conduction of the power conversion circuit to supply power to the brake.

[0014] In the above solution, the first controller is provided with an input unit for human-computer interaction, and the first controller controls the intermittent conduction of the power conversion circuit based on the control instruction generated by the input unit.

[0015] In the above solution, the input unit includes at least one of the following: a button, a knob, a touch screen and a voice acquisition module.

[0016] In the above scheme, the backup power supply circuit also includes:

[0017] The anti-reverse diode is arranged between the power conversion circuit and the power supply line of the brake, so that the power conversion circuit supplies power to the power supply line of the brake in a unidirectional manner.

[0018] In the above scheme, the power failure protection device also includes:

[0019] A charging management circuit is connected to the power supply line of the brake and the energy storage unit, and is used to draw power from the power supply line of the brake and charge the energy storage unit.

[0020] In the above scheme, the first controller is connected to the main controller of the construction elevator and is used to shield the control instructions of the input unit based on the indication information of the main controller; wherein the indication information is used to indicate whether the main power supply circuit is supplying power normally.

[0021] In the second aspect, an embodiment of the present application provides a construction elevator, which includes a lifting drive mechanism for driving a cage to move up and down along a standard section and a brake for braking the cage, the power supply line of the brake is connected to the main power supply circuit of the brake, and the brake switches the operating state based on the starting state of the main power supply circuit. The construction elevator also includes: the construction elevator power failure protection device described in the first aspect of the embodiment of the present application.

[0022] In the technical solution provided by the embodiment of the utility model, the power failure protection device of the construction elevator includes: a backup power supply circuit and a first controller, the backup power supply circuit is connected to the power supply line of the brake and is arranged in parallel with the main power supply circuit; the first controller is connected to the backup power supply circuit, and is used to control the intermittent conduction of the backup power supply circuit when the main power supply circuit is powered off, so that the cage is in an intermittent braking state. In this way, when the main power supply circuit of the brake is abnormally powered off, based on the cooperation of the first controller and the backup power supply circuit, the cage can slowly slide down in the intermittent braking state of the brake, thereby realizing that the cage can be stably docked at the standard floor, which is convenient for the safe entry and exit of drivers and passengers and goods, and is conducive to improving the safety of the operation of the construction elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an electric control system of a construction hoist in the related art;

[0024] Figure 2 This is a schematic structural diagram of a power failure protection device introduced into the electric control system of a construction elevator according to an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1. Main controller; 2. Main power supply circuit; 3. Energy absorption unit;

[0027] 4. Electromagnetic brake; 5. Motor;

[0028] 6. Motor power supply circuit; 7. Anti-reverse diode; 8. Power conversion circuit;

[0029] 9. a first controller; 10. an input unit;

[0030] 11. Energy storage unit;

[0031] 12. Power supply lines. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it can be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0034] In the description of the present invention, the terms "first, second" and the like are only used to distinguish similar objects and do not represent a specific order of the objects. It is understandable that "first, second" and the like can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein. Unless otherwise specified, "plurality" means at least two.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the related technology, the construction elevator includes a lifting drive mechanism that drives the cage to move up and down along the standard section and a brake for braking the cage. The power supply line of the brake is connected to the main power supply circuit of the brake, and the brake switches the operating state based on the startup state of the main power supply circuit.

[0038] For example, Figure 1 As shown, the lifting drive mechanism may include a plurality of motors 5, each motor 5 may be provided with a corresponding motor power supply circuit 6, and each motor power supply circuit 6 may be controlled by the main controller 1 of the construction lift. The brake may include a plurality of electromagnetic brakes 4, each electromagnetic brake 4 is provided corresponding to the motor 5, and the plurality of electromagnetic brakes 4 may share a power supply line 12, the power supply line 12 is connected to the main power supply circuit 2, and each electromagnetic brake 4 switches the operating state based on the startup state of the main power supply circuit 2. Specifically, if the startup state of the main power supply circuit 2 is to start the power supply, each electromagnetic brake 4 is in a non-braking state, and if the startup state of the main power supply circuit 2 is to stop the power supply, each electromagnetic brake 4 is in a braking state.

[0039] Exemplarily, the basic working principle of the construction elevator is as follows: when the main controller 1 of the construction elevator electronic control system receives an external command to make the cage move upward, on the one hand, it will give a command to the motor power supply circuit 6 to turn on the power of the motor 5; at the same time, it will also give a command to the main power supply circuit 2 to turn on the power of the electromagnetic brake 4. At this time, the construction elevator will run in a predetermined direction. When it needs to stop, the main controller 1 of the construction elevator electronic control system will turn off the corresponding power to the motor power supply circuit 6 and the main power supply circuit 2 respectively, and the construction elevator will stop running.

[0040] When the power supply of the power grid is normal, it can meet the construction requirements. However, when the power supply of the construction site power grid occasionally fails, the motor 5 cannot rotate due to the lack of working power, and the brake can only brake. At this time, the cage will stop in mid-air, and professionals are required to climb into the cage and manually release the brake to lower the cage to the nearest floor, which brings many inconveniences to the use of the elevator.

[0041] Based on this, an embodiment of the utility model aims to provide a power failure protection device for a construction elevator. When the power failure occurs at the construction site, the driver and passengers in the cage can control the cage to descend to the target floor.

[0042] like Figure 2As shown, the power failure protection device for the construction elevator of the embodiment of the utility model includes: a backup power supply circuit and a first controller 9, the backup power supply circuit is connected to the power supply line 12 of the brake and is arranged in parallel with the main power supply circuit 2; the first controller 9 is connected to the backup power supply circuit, and is used to control the intermittent conduction of the backup power supply circuit when the main power supply circuit 2 is powered off, so that the cage is in an intermittent braking state. In this way, when the main power supply circuit 2 of the brake is abnormally powered off, based on the cooperation of the first controller 9 and the backup power supply circuit, the cage can slowly slide down in the intermittent braking state of the brake, thereby realizing that the cage can be stably docked at the standard floor, which is convenient for the safe entry and exit of drivers and passengers and goods, and is conducive to improving the safety of the operation of the construction elevator.

[0043] Exemplarily, the backup power supply circuit includes: an energy storage unit 11 and a power conversion circuit 8, wherein the power conversion circuit 8 is connected to the energy storage unit 11 and a power supply line 12 of the brake, and is used to convert the electrical energy of the energy storage unit 11 and supply power to the brake; wherein the first controller 9 is connected to the control end of the power conversion circuit 8, and is used to control the intermittent conduction of the power conversion circuit 8 to supply power to the brake.

[0044] Exemplarily, the first controller 9 is provided with an input unit 10 for human-computer interaction, and controls the power conversion circuit 8 to be intermittently turned on based on a control instruction generated by the input unit 10 .

[0045] Here, the first controller 9 can respond to the control instruction generated by the input unit 10 to control the power conversion circuit 8 to be intermittently turned on according to the set on-off frequency, thereby realizing intermittent braking of the brake.

[0046] Exemplarily, the input unit 10 includes at least one of the following: a button, a knob, a touch screen, and a voice collection module.

[0047] It is understandable that the cage driver and passengers can make the input unit 10 generate the aforementioned control instructions by pressing buttons, rotating knobs, touching the touch screen or voice input, etc., and the embodiment of the utility model is not limited to this.

[0048] Exemplarily, the backup power supply circuit also includes: an anti-reverse diode 7, which is arranged between the power conversion circuit 8 and the power supply line 12 of the brake, so that the power conversion circuit 8 supplies power to the power supply line 12 of the brake in a unidirectional manner. In this way, the current output by the backup power supply circuit opens the electromagnetic brake 4 through the anti-reverse diode 7, causing the cage of the construction elevator to move downward.

[0049] Exemplarily, the power failure protection device further includes: a charging management circuit ( Figure 2(not shown) connecting the power supply line 12 of the brake and the energy storage unit 11, and being used to draw power from the power supply line 12 of the brake and charge the energy storage unit 11.

[0050] It should be noted that, during the descending process of the cage, reverse electric energy will be generated on the power supply line 12 of the brake, and the reverse electric energy can be absorbed by the energy absorption unit 3 (for example, a resistor). Preferably, the reverse electric energy can also be converted by a charging management circuit and stored in the energy storage unit 11, thereby charging the energy storage unit 11 to meet the supply of backup power in the event of a city power outage.

[0051] Exemplarily, the first controller 9 is connected to the main controller 1 of the construction elevator, and is used to shield the control instructions of the input unit 10 based on the indication information of the main controller 1; wherein the indication information is used to indicate whether the main power supply circuit 2 is supplying power normally.

[0052] Exemplarily, the basic principle of the power failure protection device for the construction elevator of the embodiment of the utility model is as follows: through the external energy storage unit 11, when the city power is off and the cage is not at the floor position, the driver and passengers can generate control instructions through the input unit 10 on the first controller 9, and the first controller 9 controls the power conversion circuit 8 to complete the intermittent switching of the backup power supply, thereby realizing intermittent braking of the electromagnetic brake 4, so that the cage slides down to the floor, without the need for professionals to manually release the brake to lower the cage, thereby reducing the problem of the construction elevator being stopped in mid-air due to power failure, and the driver and cargo being unable to enter and exit, further avoiding accidents and improving the riding experience of the construction elevator.

[0053] It should be noted that when the main power supply circuit 2 is normally powered, the main controller 1 of the construction elevator will give a control signal to the first controller 9, and the first controller 9 will shield the control instructions of the input unit, so that the power conversion circuit 8 cannot be turned on and the output is zero, so that the additional power outage descent circuit does not interfere with the normal operation of the original construction elevator; when the city power is out, as long as the input unit 10 is manually operated, the first controller 9 will control the power conversion circuit 8, so that the backup power supply outputs power according to the pre-set on-off frequency. At this time, the current will pass through the anti-reverse diode 7 to open the electromagnetic brake 4, causing the construction elevator cage to descend.

[0054] It should be noted that the technical solutions described in the embodiments of the present utility model can be combined arbitrarily without conflict.

[0055] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A power failure protection device for a construction elevator, characterized in that: Applied to a construction hoist, the construction hoist comprises a lifting drive mechanism for driving a cage to move up and down along a standard section and a brake for braking the cage, the power supply line of the brake is connected to the main power supply circuit of the brake, the brake switches the operating state based on the start-up state of the main power supply circuit, and the power failure protection device of the construction hoist comprises: A backup power supply circuit, connected to the power supply line of the brake and arranged in parallel with the main power supply circuit; The first controller is connected to the backup power supply circuit and is used to control the intermittent conduction of the backup power supply circuit when the main power supply circuit is powered off, so that the cage is in an intermittent braking state.

2. The power failure protection device for a construction elevator according to claim 1, characterized in that: The backup power supply circuit comprises: Energy storage unit; A power conversion circuit, connected to the power supply line of the energy storage unit and the brake, for converting the electric energy of the energy storage unit and supplying power to the brake; Wherein, the first controller is connected to the control end of the power conversion circuit, and is used to control the intermittent conduction of the power conversion circuit to supply power to the brake.

3. The power failure protection device for a construction elevator as claimed in claim 2, characterized in that: The first controller is provided with an input unit for human-computer interaction, and the first controller controls the intermittent conduction of the power conversion circuit based on a control instruction generated by the input unit.

4. The power failure protection device for a construction elevator as claimed in claim 3, characterized in that: The input unit includes at least one of the following: a button, a knob, a touch screen and a voice collection module.

5. The power failure protection device for a construction elevator according to claim 2, characterized in that: The backup power supply circuit also includes: The anti-reverse diode is arranged between the power conversion circuit and the power supply line of the brake, so that the power conversion circuit supplies power to the power supply line of the brake in a unidirectional manner.

6. The power failure protection device for a construction elevator according to claim 2, characterized in that: The construction hoist power failure protection device also includes: A charging management circuit is connected to the power supply line of the brake and the energy storage unit, and is used to draw power from the power supply line of the brake and charge the energy storage unit.

7. The power failure protection device for a construction elevator according to claim 3 is characterized in that: The first controller is connected to the main controller of the construction elevator and is used to shield the control instructions of the input unit based on the indication information of the main controller; wherein the indication information is used to indicate whether the main power supply circuit is supplying power normally.

8. A construction hoist, characterized in that: The construction elevator includes a lifting drive mechanism for driving the cage to move up and down along the standard section and a brake for braking the cage. The power supply line of the brake is connected to the main power supply circuit of the brake. The brake switches the operating state based on the starting state of the main power supply circuit. The construction elevator also includes: a construction elevator power failure protection device as described in any one of claims 1 to 7.

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