CN216889580U - Double power-off rescue system for screw elevator and screw elevator comprising same - Google Patents
Double power-off rescue system for screw elevator and screw elevator comprising same Download PDFInfo
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- CN216889580U CN216889580U CN202123102920.9U CN202123102920U CN216889580U CN 216889580 U CN216889580 U CN 216889580U CN 202123102920 U CN202123102920 U CN 202123102920U CN 216889580 U CN216889580 U CN 216889580U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
Abstract
The utility model relates to a double power-off rescue system for a screw elevator and the screw elevator comprising the same, wherein the double power-off rescue system for the screw elevator comprises an automatic downlink control switch, a manual uplink control switch, a manual downlink control switch, a standby power supply unit, an operation contactor, a reversing relay and a motor; the automatic downlink control switch, the manual uplink control switch and the manual downlink control switch are connected in parallel between the anode and the cathode of the standby power supply unit; the operation contactor is respectively connected with the automatic downlink control switch and the manual downlink control switch in series, and the operation contactor is connected with the reversing relay in parallel and then connected with the manual uplink control switch in series; the operation contactor and the reversing relay are electrically connected with the motor, and the operation contactor and the reversing relay control the forward rotation and the reverse rotation of the motor by switching the normally open contact and the normally closed contact. The situation that people or articles are trapped in the elevator car due to power failure caused by power grid abnormality is avoided, and safety accidents are reduced.
Description
Technical Field
The utility model relates to the technical field of elevator rescue, in particular to a double power-off rescue system for a screw elevator and the screw elevator comprising the same.
Background
An elevator is a vertical elevator powered by an electric motor and equipped with a box-like car for carrying people or cargo in a multi-story building. With the continuous building of high-rise buildings, elevators are widely used as vertical transportation vehicles in buildings. As one type of elevator, a screw elevator employs a motor as a power source, and the motor drives a screw to rotate, so that the screw drives an L-shaped lifting platform to ascend or descend. In the running process of the elevator, if the elevator is powered off due to power grid abnormality, people or objects are trapped in the elevator car, so that the trapped people are panic, and even safety accidents occur. In order to avoid the situation, an elevator power-off emergency rescue device is required to be arranged in the elevator, and emergency power supply can be provided for an elevator control system when the elevator is powered off, so that trapped people can be rescued.
The above statements in the background are only intended to facilitate a thorough understanding of the present technical solutions (technical means used, technical problems solved and technical effects produced, etc.) and should not be taken as an acknowledgement or any form of suggestion that the messages constitute prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a double power-off rescue system for a screw elevator and the screw elevator comprising the same. When the power failure occurs to the external power grid of the elevator, the dual-power-off rescue system for the screw elevator realizes dual rescue through the automatic downlink control switch for CPU control and the manual control switch for manual operation of people, and the elevator runs to the flat position of a floor through the control motor, so that trapped people are rescued.
According to an embodiment of the utility model, a dual power-off rescue system for a screw elevator is provided, which comprises an automatic downlink control switch, a manual control switch, a standby power supply unit, a running contactor, a reversing relay and a motor; the manual control switch comprises a manual uplink control switch and a manual downlink control switch; the automatic downlink control switch, the manual uplink control switch and the manual downlink control switch are connected in parallel between the anode and the cathode of the standby power supply unit and used for controlling the power-on and power-off of the standby power supply unit; the running contactor is connected with the automatic downlink control switch and the manual downlink control switch in series respectively, and the running contactor is connected with the reversing relay in parallel and then connected with the manual uplink control switch in series; the operation contactor and the reversing relay are electrically connected with the motor, the operation contactor and the reversing relay respectively comprise a normally open contact which is closed by the electrification control of the standby power supply unit and a normally closed contact which is opened by the electrification control of the standby power supply unit, and the forward rotation and the reverse rotation of the motor are controlled by the switching of the normally open contact and the normally closed contact; the motor is used for controlling the elevator to move upwards or downwards through forward rotation and reverse rotation of the motor.
Further, the operation contactor comprises a first normally open contact, a second normally open contact and a first normally closed contact, the reversing relay comprises a third normally open contact, a fourth normally open contact, a second normally closed contact and a third normally closed contact, and the first normally open contact, the second normally closed contact, the motor, the third normally closed contact and the second normally open contact are sequentially connected in series between the positive electrode and the negative electrode of the standby power supply unit; the first normally open contact, the third normally open contact, the motor, the fourth normally open contact and the second normally open contact are sequentially connected in series between the anode and the cathode of the standby power supply unit; the first normally closed contact is connected with the motor in parallel.
Further, the backup power supply unit includes a secondary battery and a secondary battery charging circuit.
Further, the screw elevator comprises a screw for conveying the elevator upwards or downwards, and a coupling is axially arranged between the motor and the screw.
Further, the motor, the coupling and the screw are installed at the top of the shaft where the screw elevator is located.
Further, the standby power supply unit and the automatic downward control switch are installed on a control cabinet of the screw elevator.
Further, the control cabinet is provided with an emergency lighting circuit, and the emergency lighting circuit is connected between the positive pole and the negative pole of the standby power supply unit.
Further, the operation contactor and the reversing relay are mounted on an electric box at the bottom of the shaft where the screw elevator is located.
Further, the manual control switch is installed outside the shaft where the screw elevator is located.
According to an embodiment of the present invention, there is also provided a screw elevator including the dual outage rescue system for screw elevators according to an embodiment of the present invention.
By adopting the technical scheme, the utility model has the following beneficial effects: the automatic rescue system consists of an automatic loop and a manual loop, when the power grid is powered off, the control cabinet starts the control of the standby power supply unit, the CPU of the elevator control system detects related signals, and the automatic downlink control switch is automatically turned on to control the motor to perform downward rescue operation. When the peripheral signals are abnormal and the CPU of the elevator control system judges that automatic rescue cannot be carried out, operators need to carry out manual rescue, and the motors are controlled by the manual ascending control switch and the manual descending control switch to carry out ascending/descending rescue. Therefore, the situation that people or articles are trapped in the elevator car due to the fact that the elevator is powered off due to the power grid abnormality is avoided, and safety accidents are reduced.
Drawings
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. For purposes of clarity, the same reference numbers will be used in different drawings to identify the same elements. It is noted that the drawings are merely schematic and are not necessarily drawn to scale. In these drawings:
fig. 1 is a block diagram illustrating a dual outage rescue system for a screw elevator according to an exemplary embodiment of the present invention.
Fig. 2 is a circuit schematic diagram illustrating a standby power supply unit power supply control of a dual outage rescue system for a screw elevator according to an exemplary embodiment of the present invention.
Fig. 3 is a schematic circuit diagram illustrating that respective control switches of a dual power-off rescue system for a screw elevator perform dual power-off rescue according to an exemplary embodiment of the present invention.
Fig. 4 is a circuit schematic diagram illustrating a motor control loop of a dual outage rescue system for a screw elevator according to an exemplary embodiment of the present invention.
Fig. 5 is a schematic structural view illustrating an actuator of a dual power-off rescue system for a screw elevator according to an exemplary embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below, which are carried out on the premise of the technical scheme of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the embodiments described below.
Fig. 1 is a block diagram illustrating a dual outage rescue system for a screw elevator according to an exemplary embodiment of the present invention. A dual outage rescue system for a screw elevator according to an exemplary embodiment of the present invention may include a control loop and an actuator, wherein the control loop includes a backup power unit, respective control switches, an operation control part, and associated circuitry of a motor control loop.
Fig. 2 is a circuit schematic diagram illustrating a standby power supply unit power supply control of a dual outage rescue system for a screw elevator according to an exemplary embodiment of the present invention. As shown in fig. 2, the backup power supply unit 10 may include a secondary battery 11 and a secondary battery charging circuit 12. Since the battery 11 is naturally discharged, a battery charging circuit 12 is provided to detect the voltage of the battery 11 and control the charging. According to the present embodiment, the voltage supplied by the backup power supply unit 10 is 24V.
In the exemplary embodiment of the present invention, the respective control switches are connected between the positive electrode and the negative electrode of the backup power supply unit 10, and are connected in parallel. The control switch may comprise an automatic down control switch 20.
As shown in fig. 2, the backup power supply unit 10 is electrically connected to the automatic down control switch 20 among the control switches, and the 24V voltage of the backup power supply unit 10 is output through the a terminal. The automatic downward control switch 20 is a switch controlled by a Central Processing Unit (CPU) of the elevator control system. According to the present embodiment, the backup power supply unit 10 and the automatic downward control switch 20 are installed in the control cabinet of the screw elevator. The control cabinet is the core of the elevator system and controls the operation of the whole elevator system, when the control cabinet detects the power failure of a peripheral power grid, the control cabinet can be automatically switched to the standby power supply unit 10, and a CPU of the elevator control system can judge whether to execute automatic rescue according to the current safety and the on-off condition of a door lock loop. If the safety and door lock circuits are all normal, the automatic down control switch 20 is activated.
Preferably, the control cabinet of the screw elevator is further provided with an emergency lighting circuit 100, and the emergency lighting circuit 100 is connected between the positive pole and the negative pole of the standby power supply unit 10, so that maintenance work can be conveniently carried out by an operator, and related operations are more flexible, convenient and safe.
Fig. 3 is a schematic circuit diagram illustrating that respective control switches of a dual power-off rescue system for a screw elevator perform dual power-off rescue according to an exemplary embodiment of the present invention.
In an exemplary embodiment of the present invention, the control switches may further include a manual down control switch 30 and a manual up control switch 40. The manual down control switch 30 and the manual up control switch 40 constitute a manual control switch. According to the embodiment, the manual control switch is installed outside the shaft where the screw elevator is located.
As shown in fig. 3, the power source shown in fig. 3 is the standby power unit 10 shown in fig. 2, and specifically, the standby power unit 10 in fig. 2 outputs power to the E terminal and the F terminal of fig. 2 through the C terminal and the D terminal, where the E terminal is a positive electrode and the F terminal is a negative electrode. The manual down control switch 30 and the manual up control switch 40 are connected in parallel between the positive and negative poles of the power supply.
Preferably, the manual down control switch 30 may include a first manual down control switch 31 and a second manual down control switch 32. Manual uplink control switch 40 may include a first manual uplink control switch 41, a second manual uplink control switch 42, and a third manual uplink control switch 43.
In an exemplary embodiment of the present invention, the operation control part may include an operation contactor 50 and a reversing relay 60. The running contactor 50 and the reversing relay 60 may include a normally open contact that is closed by energization control of the backup power supply unit 10 and a normally closed contact that is opened by energization control of the backup power supply unit 10, respectively.
The 24V voltage of the backup power unit 10 is transmitted to the B terminal of fig. 3 through the a terminal of fig. 2, and is connected to the negative electrode of the power source via the running contactor 50. When the CPU of the elevator control system starts the automatic down control switch 20, the standby power supply unit 10 is energized, and the running contactor 50 operates, which includes a normally open contact that is closed and a normally closed contact that is opened.
The first manual down control switch 31 and the second manual down control switch 32 are connected in series with the running contactor 50 in sequence between the positive pole and the negative pole of the power supply. When the first manual down control switch 31 and the second manual down control switch 32 are turned on by manual operation of a human hand, the standby power supply unit 10 is energized, and the operating contactor 50 operates, and a normally open contact included therein is closed and a normally closed contact is opened.
The first manual uplink control switch 41 is connected with the second manual uplink control switch 42 in series, the reversing relay 60 is connected with the third manual uplink control switch 43 in series, the operation contactor 50 is connected with the reversing relay 60 and the third manual uplink control switch 43 which are connected in series in parallel, one end of the first manual uplink control switch 41, which is connected with the second manual uplink control switch 42 in series, is connected to the positive electrode of a power supply, the other end of the first manual uplink control switch is connected with one end of the operation contactor 50, the reversing relay 60, which is connected with the third manual uplink control switch 43 in parallel, and the other end of the operation contactor 50, the reversing relay 60 and the third manual uplink control switch 43, which is connected with the power supply in parallel, is connected to the negative electrode of the power supply. When the first manual upward control switch 41, the second manual upward control switch 42, and the third manual upward control switch 43 are turned on at the same time of manual operation, the backup power supply unit 10 is energized, and the operating contactor 50 and the reversing relay 60 are all operated. The normally open contact in the operating contactor 50 is closed and the normally closed contact is open; the normally open contacts in the commutating relay 60 are closed and the normally closed contacts are open.
Fig. 4 is a circuit schematic diagram illustrating a motor control loop of a dual outage rescue system for a screw elevator according to an exemplary embodiment of the present invention.
The motor control circuit comprises a first normally open contact NO1, a second normally open contact NO2, a third normally open contact NO3, a fourth normally open contact NO4, a first normally closed contact NC1, a second normally closed contact NC2, a third normally closed contact NC3 and a motor.
The running contactor 50 includes a first normally open contact NO1, a second normally open contact NO2, and a first normally closed contact NC 1. When the system CPU starts the automatic down control switch 20 or the human-operated manual down switch 30 is turned on or the human-operated manual up switch 40 is turned on, the standby power supply unit 10 is powered on, the first normally open contact NO1 and the second normally open contact NO2 are closed, and the first normally closed contact NC1 is opened.
The reversing relay 60 comprises a third normally open contact NO3, a fourth normally open contact NO4, a second normally closed contact NC2 and a third normally closed contact NC 3. When the manual ascending switch 40 is operated by a person to be turned on and the standby power supply unit 10 is powered on, the third normally-open contact NO3 and the fourth normally-open contact NO4 are closed, and the second normally-closed contact NC2 and the third normally-closed contact NC3 are opened.
The states of the normally open contacts and the normally closed contacts shown in fig. 4 are states in which neither the running contactor 50 nor the reversing relay 60 is operated in the case where the backup power supply unit 10 is powered off.
The running contactor 50 and the reversing relay 60 may be electrically connected to the motor 70, and the normal rotation and the reverse rotation of the motor 70 may be controlled by switching between a normally open contact and a normally closed contact.
Specifically, when the running contactor 50 is energized to operate by the standby power supply unit 10, the first normally open contact NO1, the second normally closed contact NC2, the motor 70, the third normally closed contact NC3 and the second normally open contact NO2 are sequentially connected in series between the positive pole and the negative pole of the power supply, so as to form a control circuit for enabling the motor to generate one-way steering. When the operating contactor 50 and the reversing relay 60 are both powered by the standby power supply unit 10 to act, the first normally open contact NO1, the third normally open contact NO3, the motor 70, the fourth normally open contact NO4 and the second normally open contact NO2 are sequentially connected in series between the positive pole and the negative pole of the power supply, so that a control circuit for enabling the motor to generate another reverse direction is formed. The first normally closed contact NC1, which is a normally closed contact of the running contactor, is always open when the backup power supply unit 10 is energized, and is connected in parallel with the motor 70.
The operating contactor 50 and the reversing relay 60 are mounted to the electrical box at the bottom of the hoistway where the screw elevator is located. The manual control switch is installed outside the shaft where the screw elevator is located, preferably in a position 2 meters outside the shaft, and is convenient for professional rescuers to carry out manual rescue operation.
Fig. 5 is a schematic structural view illustrating an actuator of a dual power-off rescue system for a screw elevator according to an exemplary embodiment of the present invention.
As shown in fig. 5, the actuator may include a motor 70, a coupling 80, and a screw 90. The screw elevator includes a screw 90 for conveying the elevator up or down, and a coupling 80 is axially fitted between the motor 70 and the screw 90. The motor 70, the coupling 80 and the screw 90 are mounted on the top of the hoistway where the screw elevator is located. The motor 70 controls the elevator to go up or down through the forward rotation and the reverse rotation of the motor.
The operating principle of the dual outage rescue system for a screw elevator according to an exemplary embodiment of the present invention is: when the control cabinet detects that the peripheral power grid is powered off, the standby power supply unit 10 is automatically switched to, and the CPU judges whether to execute automatic rescue according to the current safety and the on-off condition of the door lock loop. If the safety and door lock loop are all normal, the automatic downlink control switch 20 is started, the 24V of the standby power supply unit 10 is transmitted to the terminal B of the figure 2 through the terminal A of the figure 1, then the running contactor 50 is operated, the power supply enables the motor 70 and the coupler 80 to enable the screw 90 to rotate forwards through the motor control loop, the automatic downlink is executed, and the rescue is completed.
When the automatic rescue fails, an operator operates the manual control switch by using a special handle after arriving at the site, when the operator moves upwards, the operation contactor 50 and the reversing relay 60 move, when the operator moves downwards, the operation contactor 50 moves, and the power supply enables the motor 70 and the coupler 80 to drive the screw to rotate forwards or backwards through the motor control loop, so that the screw elevator moves upwards or downwards to the flat floor, and the rescue is completed.
When the power grid is cut off, automatic rescue operation is preferentially executed and is judged by the system. When the automatic rescue operation fails, operators need to confirm the situation after arriving at the site and use a manual rescue loop to place the screw platform to the flat layer position, and rescue is completed. Therefore, the situation that people or articles are trapped in the elevator car due to the fact that the elevator is powered off due to the power grid abnormality is avoided, and safety accidents are reduced.
The various embodiments of the utility model are not an exhaustive list of all possible combinations, but are intended to describe representative aspects of the utility model, and what is described in the various embodiments can be applied independently or in combinations of two or more.
The above description of exemplary embodiments has been presented only to illustrate the technical solutions of the present invention, and is not intended to be exhaustive or to limit the utility model to the precise forms described. Obviously, many modifications and variations are possible in light of the above teaching to those skilled in the art. The exemplary embodiments were chosen and described in order to explain certain principles of the utility model and its practical application to thereby enable others skilled in the art to understand, implement and utilize the utility model in various exemplary embodiments and with various alternatives and modifications. It is intended that the scope of the utility model be defined by the following claims and their equivalents.
Claims (10)
1. A double power-off rescue system for a screw elevator is characterized by comprising an automatic downlink control switch, a manual control switch, a standby power supply unit, an operation contactor, a reversing relay and a motor;
the manual control switch comprises a manual uplink control switch and a manual downlink control switch;
the automatic downlink control switch, the manual uplink control switch and the manual downlink control switch are connected in parallel between the anode and the cathode of the standby power supply unit and used for controlling the power-on and power-off of the standby power supply unit;
the running contactor is connected with the automatic downlink control switch and the manual downlink control switch in series respectively, and the running contactor is connected with the reversing relay in parallel and then connected with the manual uplink control switch in series;
the operation contactor and the reversing relay are electrically connected with the motor, the operation contactor and the reversing relay respectively comprise a normally open contact which is closed by the electrification control of the standby power supply unit and a normally closed contact which is opened by the electrification control of the standby power supply unit, and the forward rotation and the reverse rotation of the motor are controlled by the switching of the normally open contact and the normally closed contact;
the motor is used for controlling the elevator to move upwards or downwards through forward rotation and reverse rotation of the motor.
2. Dual outage rescue system for screw elevators according to claim 1,
the operating contactor comprises a first normally open contact, a second normally open contact and a first normally closed contact, the reversing relay comprises a third normally open contact, a fourth normally open contact, a second normally closed contact and a third normally closed contact,
the first normally open contact, the second normally closed contact, the motor, the third normally closed contact and the second normally open contact are sequentially connected in series between the anode and the cathode of the standby power supply unit;
the first normally open contact, the third normally open contact, the motor, the fourth normally open contact and the second normally open contact are sequentially connected in series between the anode and the cathode of the standby power supply unit;
the first normally closed contact is connected with the motor in parallel.
3. The dual outage rescue system for a screw elevator according to claim 1, characterized in that the backup power supply unit includes a battery and a battery charging circuit.
4. The dual outage rescue system for screw elevators according to claim 1, characterized in that the screw elevator comprises a screw for conveying the elevator up or down, the motor and the screw being axially fitted with a coupling.
5. The dual outage rescue system for screw elevators according to claim 1, characterized in that the motor, the coupling and the screw are mounted at the top of the hoistway where the screw elevator is located.
6. The dual outage rescue system for the screw elevator according to claim 1, characterized in that the backup power supply unit and the automatic down control switch are mounted to a control cabinet of the screw elevator.
7. Double outage rescue system for screw elevators according to claim 6, characterized in that the control cabinet is provided with an emergency lighting circuit connected between the positive and negative poles of the backup power unit.
8. The double power outage rescue system for the screw elevator according to claim 1, characterized in that the operation contactor and the reversing relay are mounted to an electrical box at the bottom of a hoistway where the screw elevator is located.
9. The dual outage rescue system for the screw elevator according to claim 1, characterized in that the manual control switch is mounted outside a hoistway where the screw elevator is located.
10. Screw elevator, characterized in that it comprises a double power-off rescue system for a screw elevator according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123102920.9U CN216889580U (en) | 2021-12-08 | 2021-12-08 | Double power-off rescue system for screw elevator and screw elevator comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123102920.9U CN216889580U (en) | 2021-12-08 | 2021-12-08 | Double power-off rescue system for screw elevator and screw elevator comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216889580U true CN216889580U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123102920.9U Active CN216889580U (en) | 2021-12-08 | 2021-12-08 | Double power-off rescue system for screw elevator and screw elevator comprising same |
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| Country | Link |
|---|---|
| CN (1) | CN216889580U (en) |
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2021
- 2021-12-08 CN CN202123102920.9U patent/CN216889580U/en active Active
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