A device for new power supply and energy saving of elevator in nuclear power plant

Abstract

This invention belongs to the field of new energy application technology for rotating equipment in nuclear power plants, specifically relating to a novel power supply and energy-saving device for nuclear power plant elevators. Five piezoelectric oscillator crystals are embedded in bow-shaped devices. Two symmetrical bow-shaped devices form bow-shaped blocks, constituting a power supply unit. Several power supply units are embedded in a frame plate, which is installed in the elevator lobby. Based on the piezoelectric principle, when the piezoelectric oscillator crystals in the power supply units are compressed by external force, internal polarization occurs, and a certain amount of charge is attached to their surfaces. Mechanical energy is converted into electrical energy by external vibration, generating a certain current. These are connected in series using graphene coils to increase power control and output. This invention provides a triple power supply circuit for functional devices, offering three important guarantees for their power supply, increasing elevator comfort, and reducing maintenance labor costs.

Description

Technical Field

[0001] This invention belongs to the field of new energy application technology for rotating equipment in nuclear power plants, and specifically relates to a new power supply and energy-saving device for elevators in nuclear power plants. Background Technology

[0002] Currently, nuclear power units are widespread, with no fewer than 70 units installed nationwide. Each unit is equipped with two elevators in the nuclear island, resulting in approximately 140 elevators installed within the nuclear island. The power supply for the elevator's lighting, ventilation, air conditioning, electric bells, voice control systems, and other functional devices is all sourced from the mains power supply and must operate 24 hours a day. The primary function of elevators is to transport passengers or goods, reducing working distances; therefore, the power supply is mainly used for the elevator's brakes, motors, control systems, and door systems. However, with technological advancements, users are no longer satisfied with the elevator's basic performance. For safety and comfort considerations, functional devices such as lighting, ventilation, air conditioning, electric bells, and voice control systems have gradually emerged. The addition of these functional devices significantly increases the power loss of elevators. Based on energy consumption calculations for these functional devices, the cumulative power of a single elevator can reach approximately 500W, consuming an average of 1 kWh every two hours, 12 kWh per day, and 4380 kWh per year. 100 elevators could incur over 260,000 yuan in electricity costs annually. Meanwhile, the presence of these functional devices increases maintenance costs to some extent. Whether from a comfort or safety perspective, maintenance personnel need to respond immediately to address any malfunctions in these devices to meet user needs. Most malfunctions are caused by power outages, but these devices lack backup circuits. If a malfunction occurs and the backup circuit cannot be activated, it reduces elevator comfort and safety, and increases maintenance costs. Furthermore, with the vigorous development of new energy power supply methods in many fields, the elevator industry faces a significant gap in this area. However, the power supply for elevator functional device systems is well-suited to adopting new energy sources. Summary of the Invention

[0003] The purpose of this invention is to provide a novel power supply and energy-saving device for nuclear power plant elevators. This innovative power supply method can save 4380 kWh of traditional electricity per elevator per year, filling the gap in new energy power supply for elevator functions and redirecting grid power back to the dedicated elevator power unit. Furthermore, this invention provides a triple power supply circuit for the functional devices, offering three crucial safeguards for their power supply, increasing elevator comfort, and reducing maintenance labor costs.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A novel power supply and energy-saving device for nuclear power plant elevators comprises five piezoelectric oscillator crystals embedded in an arc-shaped device. Two symmetrical arc-shaped devices form an arc-shaped block, constituting a power supply unit. Several power supply units are embedded in a frame plate, which is laid in the elevator hall.

[0006] It is shaped like an arch of the foot.

[0007] Piezoelectric ceramics made of lead zirconate titanate.

[0008] Based on the piezoelectric principle, when the piezoelectric oscillator crystal on the power supply unit is squeezed by external force, polarization occurs inside, and a certain amount of charge is attached to the surface. It converts mechanical energy into electrical energy by relying on external vibration, and generates a certain current. Graphene coils are connected in series to increase the control and output of electrical energy.

[0009] The frame plate is called the power supply plate. The elevator is equipped with 4 power supply plates, arranged in the order of A, B, C, and D.

[0010] Boards A and C are connected in series to form column α, and boards B and D are connected in series to form column β. Columns α and β are connected in parallel, with a contactor connected between the two columns. The PLC controls the connection and disconnection to complete one circuit of power supply.

[0011] The device uses an AC purification circuit composed of capacitors and resistors in its second circuit. It utilizes the principle that the voltage difference across the capacitor cannot change abruptly to limit the high and low voltages at the diode terminals to the greatest extent. Then, it is connected to a bridge circuit composed of four diodes and a rectifier and filter circuit composed of capacitors. After passing through a current-limiting and voltage-regulating regulated circuit, it is connected to the battery and connected to the downstream load through the charging and discharging of the battery.

[0012] The device uses PLC control to automatically switch between the power supply to the PZT device board and the original power supply circuit. The PLC CPU is programmed with programs for detecting power loss in each circuit, detecting piezoelectric devices, detecting automatic switching between α and β columns, detecting operation signals, and detecting automatic switching between the three circuits. The CPU also collects, compares, and transmits signals, ultimately completing automatic switching and early warning.

[0013] When the power supply of the PZT device does not meet the usage requirements, the battery circuit becomes the main power supply circuit. When the stored energy drops below 50%, if the PZT device has not yet restored power supply, the power supply circuit is directly switched to the power supply circuit. If the PZT device restores power, it is given priority to connect to the power supply of this device. Then the battery completes charging and discharging. By detecting the voltage signals of the α and β columns, the column with the stronger voltage is selected to connect to the circuit for power supply.

[0014] Five piezoelectric crystals are welded into the arc-shaped blocks and connected together by wires. Two arc-shaped blocks form a power supply unit, which is then led out through two leads. Several power supply units are embedded in the power supply board, which is arranged parallel to the elevator door inside the car. The redundant interface of the elevator-mounted PLC controller is used to connect the input and output control lines, and the control logic program of this device is input into the CPU of the PLC for debugging.

[0015] The beneficial effects achieved by this invention are as follows:

[0016] This invention provides a novel power supply method for elevator functional devices, filling the gap in new energy power supply for these devices and reducing traditional energy losses by redirecting grid power back to the dedicated elevator power unit. Furthermore, this invention provides a triple power supply circuit for the functional devices, offering three crucial safeguards for their power supply, increasing elevator comfort, and reducing maintenance labor costs.

[0017] The application of the device of this invention has certain guiding significance for reducing power loss, improving the performance of main equipment, and improving maintenance timeliness.

[0018] 1) The power supply method of the device and application method for a new type of power supply and energy saving for elevators in nuclear power plants is novel, and one elevator can save 4380 kWh of traditional electricity per year.

[0019] 2) The present invention provides a novel power supply device and application method for power supply and energy saving in nuclear power plant elevators, which fills the gap in new energy power supply for elevator functional devices.

[0020] 3) The present invention provides a novel power supply and energy-saving device and application method for nuclear power plant elevators, which designs a triple power supply circuit to provide triple important power supply protection, increase elevator comfort, and reduce maintenance labor costs.

[0021] 4) The arrangement and installation of the PZT piezoelectric oscillator crystal and power supply block in the new power supply and energy-saving device and application method for nuclear power plant elevators of the present invention are novel, and the power supply method is novel;

[0022] 5) The present invention provides a novel power supply and energy-saving device and application method for nuclear power plant elevators, which designs the piezoelectric device in the shape of the foot arch based on ergonomics to maximize the collection of power sources.

[0023] 6) The power supply block in the new power supply and energy-saving device and application method for nuclear power plant elevators of the present invention adopts the series-parallel design of α column and β column, which can be flexibly switched, safe and reliable, and avoids equipment unavailability due to power failure.

[0024] 7) The PLC control in the new power supply and energy-saving device and application method for nuclear power plant elevators of the present invention is cleverly combined with the elevator machine, which reduces the waste of redundant resources and increases the logic and reliability of the industrial control system.

[0025] 8) The circuit design of the new power supply and energy-saving device and application method for nuclear power plant elevators of the present invention includes an AC purification circuit, and the circuit design is novel.

[0026] 9) The present invention provides a novel power supply and energy-saving device and application method for nuclear power plant elevators, which solves the problem of the inability to supply power to the car lighting when the elevator malfunctions and causes panic among the passengers, improves the reliability of the equipment, and reduces the failure rate of the elevator. Attached Figure Description

[0027] Figure 1 This is a three-dimensional engineering schematic diagram of a novel power supply and energy-saving device for nuclear power plant elevators according to the present invention;

[0028] Figure 2 This is an electrical design flowchart of a novel power supply and energy-saving device for nuclear power plant elevators according to the present invention;

[0029] Figure 3 This is an electrical design circuit diagram of a novel power supply and energy-saving device for nuclear power plant elevators according to the present invention;

[0030] Figure 4 This is a PLC control diagram for a novel power supply and energy-saving device for nuclear power plant elevators according to the present invention.

[0031] In the diagram: 1. Piezoelectric oscillator crystal; 2. Bow-shaped block; 3. External lead wire; 4. Power supply board; 5. Power supply unit. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] This invention employs a novel piezoelectric power supply device, ergonomically designed to resemble the arch of the foot. It utilizes piezoelectric ceramics (PZT) made of lead zirconate titanate (PZT), with five piezoelectric oscillator crystals embedded within the arch-shaped device to ensure even force distribution. Two symmetrical arch-shaped devices, forming arch blocks that conform to the needs of the human foot, constitute a power supply unit. Several power supply units are embedded in a frame plate, which is then regularly arranged within the elevator lobby to maximize the absorption of the compression effect. Based on the piezoelectric principle, when the piezoelectric oscillator crystals in the power supply unit are subjected to external pressure, internal polarization occurs, and a certain amount of charge adheres to their surface. Mechanical energy is converted into electrical energy by external vibration, generating a current. Graphene coils are used in series within the device to enhance power control and output.

[0034] The frame board in this device is called the power supply board. A typical elevator has four power supply boards arranged in an ABCD pattern. This invention connects boards A and C in series (column α), boards B and D in series (column β), and columns α and β in parallel. A contactor is connected between the two columns, controlled by a PLC to switch them on and off, completing one power supply circuit. The cross-configuration of the power supply blocks in this device maximizes the utilization of piezoelectric resources. In cross-configuration, the circuit connection method of two-by-two series and two-by-two parallel connections reduces the failure rate of one circuit being unavailable to some extent.

[0035] The device features a dual-loop AC purification circuit composed of capacitors and resistors. Utilizing the principle that the voltage difference across a capacitor cannot change abruptly, it effectively limits the high and low voltages at the diode terminals. This is then connected to a bridge circuit consisting of four diodes and a rectifier / filter circuit composed of capacitors. The circuit is then connected to the battery via a current-limiting and voltage-regulating regulator circuit, and finally to the downstream load through the battery's charging and discharging.

[0036] This device utilizes an elevator-mounted PLC for control. While the elevator's own PLC system would require significantly more control points and space, resulting in resource waste, this device cleverly combines elevator-mounted PLC control, minimizing resource consumption and greatly reducing industrial control resource waste, thus saving energy. The device automatically switches between power supply to the PZT device board and the original power supply circuit via PLC control, ensuring power to downstream loads regardless of the fault condition. This design solves the problem of panic caused by power outages in the elevator car lighting during passenger entrapment. The PLC CPU is programmed with functions such as circuit power loss detection, piezoelectric device detection, automatic switching detection between α and β columns, operation signal detection, and automatic switching detection between the three circuits. Signal collection, comparison, and transmission are all handled within the CPU, ultimately enabling automatic switching and early warning.

[0037] By detecting power depletion in each circuit and the piezoelectric plate, the system can switch to different circuits (circuit one (piezoelectric power supply), circuit two (battery power supply), and power supply circuit) in a timely manner to ensure the availability of downstream loads. When the PZT device's power supply does not meet the usage requirements, the battery circuit becomes the main power supply circuit. When the stored energy drops below 50%, if the PZT device has not yet restored power supply, the system directly switches to the power supply circuit. If the PZT device recovers, it prioritizes power supply from this device, and the battery completes its charging and discharging process. By detecting the voltage signals of the α and β columns, the circuit with the stronger voltage is prioritized for power supply. In addition, to prevent system malfunction, the device's control allows for human intervention at any time to complete a series of operations.

[0038] The installation method of a new power supply and energy-saving device for nuclear power plant elevators is as follows:

[0039] like Figure 1 As shown in the 3D engineering diagram, five piezoelectric oscillator crystals are welded into an arc-shaped block and connected together by wires. Two arc-shaped blocks form a power supply unit, which is then led out through two leads. Several power supply units are embedded in a power supply board, which is arranged parallel to the elevator door inside the car. Each car has 2n power supply boards (usually four, in two groups).

[0040] like Figure 2 Electrical design flowchart Figure 3 As shown in the electrical design circuit diagram, the components such as diodes, capacitors, batteries, resistors, circuit breakers, and contactors are installed and wired according to the drawings and connected to the main power supply.

[0041] like Figure 4 As shown in the PLC control diagram, the redundant interface of the ladder-mounted PLC controller is used to connect the input and output control lines, and the control logic program of this device is input into the CPU of the PLC for debugging.

Claims

1. A novel power supply and energy-saving device for nuclear power plant elevators, characterized in that: Five piezoelectric crystal oscillators are embedded in an arc-shaped device. Two symmetrical arc-shaped devices are arc-shaped blocks, forming a power supply unit. Several power supply units are embedded in a frame plate, which is laid in the elevator hall.

2. The device for novel power supply and energy saving in nuclear power plant elevators according to claim 1, characterized in that: It is shaped like an arch of the foot.

3. The device for novel power supply and energy saving in nuclear power plant elevators according to claim 1, characterized in that: Piezoelectric ceramics made of lead zirconate titanate.

4. The device for novel power supply and energy saving in nuclear power plant elevators according to claim 1, characterized in that: Based on the piezoelectric principle, when the piezoelectric oscillator crystal on the power supply unit is squeezed by external force, polarization occurs inside, and a certain amount of charge is attached to the surface. It converts mechanical energy into electrical energy by relying on external vibration, and generates a certain current. Graphene coils are connected in series to increase the control and output of electrical energy.

5. The device for novel power supply and energy saving in nuclear power plant elevators according to claim 1, characterized in that: The frame plate is called the power supply plate. The elevator is equipped with 4 power supply plates, arranged in the order of A, B, C, and D.

6. The device for novel power supply and energy saving in nuclear power plant elevators according to claim 5, characterized in that: Boards A and C are connected in series to form column α, and boards B and D are connected in series to form column β. Columns α and β are connected in parallel, with a contactor connected between the two columns. The PLC controls the connection and disconnection to complete one circuit of power supply.

7. The device for novel power supply and energy saving in nuclear power plant elevators according to claim 6, characterized in that: The device uses an AC purification circuit composed of capacitors and resistors in its second circuit. It utilizes the principle that the voltage difference across the capacitor cannot change abruptly to limit the high and low voltages at the diode terminals to the greatest extent. Then, it is connected to a bridge circuit composed of four diodes and a rectifier and filter circuit composed of capacitors. After passing through a current-limiting and voltage-regulating regulated circuit, it is connected to the battery and connected to the downstream load through the charging and discharging of the battery.

8. The device for novel power supply and energy saving in nuclear power plant elevators according to claim 6, characterized in that: The device uses PLC control to automatically switch between the power supply to the PZT device board and the original power supply circuit. The PLC CPU is programmed with programs for detecting power loss in each circuit, detecting piezoelectric devices, detecting automatic switching between α and β columns, detecting operation signals, and detecting automatic switching between the three circuits. The CPU also collects, compares, and transmits signals, ultimately completing automatic switching and early warning.

9. The device for novel power supply and energy saving in nuclear power plant elevators according to claim 7, characterized in that: When the power supply of the PZT device does not meet the usage requirements, the battery circuit becomes the main power supply circuit. When the stored energy drops below 50%, if the PZT device has not yet restored power supply, the power supply circuit is directly switched to the power supply circuit. If the PZT device restores power, it is given priority to connect to the power supply of this device. Then the battery completes charging and discharging. By detecting the voltage signals of the α and β columns, the column with the stronger voltage is selected to connect to the circuit for power supply.

10. The device for novel power supply and energy saving in nuclear power plant elevators according to claim 1, characterized in that: Five piezoelectric crystals are welded into the arc-shaped blocks and connected together by wires. Two arc-shaped blocks form a power supply unit, which is then led out through two leads. Several power supply units are embedded in the power supply board, which is arranged parallel to the elevator door inside the car. The redundant interface of the elevator-mounted PLC controller is used to connect the input and output control lines, and the control logic program of this device is input into the CPU of the PLC for debugging.

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