CN219296896U

CN219296896U - Energy-saving elevator

Info

Publication number: CN219296896U
Application number: CN202223217437.XU
Authority: CN
Inventors: 王召华
Original assignee: Shanghai Shushang Intelligent Technology Co ltd
Current assignee: Shanghai Shushang Intelligent Technology Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-07-04
Anticipated expiration: 2032-12-02

Abstract

The utility model relates to the field of energy conservation, in particular to an energy-saving elevator, which has the technical scheme that: the elevator comprises an elevator shaft and a variable frequency control cabinet, wherein a machine room is fixedly arranged at the top of the elevator shaft, a power supply grid is fixedly arranged at the top of the inner wall of the machine room, and a distribution box is fixedly arranged at the left side of the power supply grid, and the elevator has the beneficial effects that: the direct current bus in the frequency converter of the control cabinet is connected with the electric energy feedback device, and the elevator electric energy feedback device automatically detects the direct current bus voltage of the frequency converter to change the direct current inversion of the direct current link of the frequency converter into alternating current with the same frequency and the same phase as the power grid voltage, and the electricity saving rate reaches 15-50% after the multi-energy conversion rate reaches more than 97%.

Description

Energy-saving elevator

Technical Field

The utility model relates to the field of energy conservation, in particular to an energy-saving elevator.

Background

The prior patent with the application number of CN201910577085.2 discloses an elevator, which relates to the technical field of lifting carrying mechanisms and comprises a carriage, a sliding rail, a traction machine, a traction rope and a counterweight structure; the lift car is connected with the traction rope through an adjusting device; the adjusting device comprises an upper support plate and a lower support plate, adjusting sliding grooves are formed in the opposite surfaces of the upper support plate and the lower support plate, the upper support plate and the lower support plate are connected through adjusting rods, and sliding heads at two ends of each adjusting rod are slidably arranged in the adjusting sliding grooves in the upper support plate and the lower support plate; an electromagnetic column is embedded in the sliding head; in the same adjusting chute, the magnetic forces of the electromagnetic columns in the adjacent sliding heads repel each other; a pedal is arranged on the inner bottom surface of the car, and pressure-sensitive sheets are arranged on the surface of the pedal in an equidistant array; the elevator is novel in structure and unique in principle, and the traction positions of the traction ropes can be intelligently adjusted according to the distribution conditions of passengers in the elevator car, so that the stress of each traction rope is ensured to be uniform, the elevator car is promoted to stably lift, and the safety and the working efficiency of the elevator are effectively improved.

However, in the electric transmission system of the elevator, the motor inevitably has a power generation process, that is, the motor rotates to be larger than the synchronous rotation speed output by the frequency converter, the electric energy generated by the motor is stored in the frequency converter to be larger than the synchronous rotation speed output by the frequency converter, and the electric energy generated by the motor is larger than the voltage stabilizing capacitor of the synchronous rotation speed output by the frequency converter, if the electric energy is not consumed, the voltage of the direct current bus is rapidly increased, and the normal operation of the frequency converter is affected.

Therefore, it is necessary to invent an energy-saving elevator.

Disclosure of Invention

Therefore, the utility model provides an energy-saving elevator, wherein a direct current bus in a control cabinet frequency converter is connected with an electric energy feedback device, and the elevator electric energy feedback device automatically detects the voltage of the direct current bus of the frequency converter, so that the direct current in the direct current link of the frequency converter is inverted into alternating current with the same frequency and the same phase as the power grid voltage, the multiple energy conversion rate reaches more than 97%, and the electric energy is effectively saved, thereby solving the problems that the electric power generation process of the motor of the elevator inevitably exists, namely the rotation of the motor is larger than the synchronous rotation speed output by the frequency converter, the electric energy generated by the motor is stored in a voltage stabilizing capacitor in which the frequency converter is larger than the synchronous rotation speed output by the frequency converter, the generated electric energy cannot be consumed, the voltage of the direct current bus is rapidly increased, and the normal operation of the frequency converter is affected.

In order to achieve the above object, the present utility model provides the following technical solutions: including elevator well and variable frequency control cabinet, elevator well top fixed mounting has the computer lab, computer lab inner wall top fixed mounting has the power supply electric wire netting, power supply electric wire netting left side fixed mounting has the block terminal, block terminal bottom fixedly connected with circuit one, variable frequency control cabinet inner wall left side top fixed mounting has the rectifier bridge, circuit one bottom fixedly connected with rectifier bridge, rectifier bridge bottom fixed mounting has circuit two, circuit two right side fixedly connected with direct current busbar bottoms pass through electric wire fixedly connected with contravariant bridge.

Preferably, the top of the direct current bus is fixedly connected with a brake resistor through an electric wire, the top of the direct current bus is fixedly connected with a third circuit, and the top of the right side of the third circuit is fixedly connected with an electric energy feedback device.

Preferably, a line IV is fixedly connected to the left side of the inverter bridge, a servo motor is fixedly connected to the left side of the line IV, a roller I is fixedly arranged at the output end of the servo motor, and a traction rope is slidingly connected to the outer wall of the roller I.

Preferably, the elevator is fixedly connected to the bottom of the traction rope, the roller II is fixedly installed at the bottom of the machine room through a support, the traction rope is slidably connected to the outer wall of the roller II, and the counterweight is fixedly connected to one end of the traction rope, which is connected with the roller II.

Preferably, a detection module is fixedly arranged at the top inside the electric energy feedback device, a DSP central processing unit is fixedly connected to the bottom of the detection module through a data line, and a PWM rectifier and a protection circuit are respectively and fixedly connected to the left end and the right end of the DSP central processing unit through the data line.

Preferably, the bottom of the DSP central processing unit is fixedly connected with the PWM rectifier through a data line, and the bottom of the PWM rectifier is fixedly connected with the protection through the data line.

Preferably, the bottom of the IGBT inverter is fixedly connected with the ILC filter through a data line, the bottom of the ILC filter is fixedly connected with a three-phase alternating current power grid, and a switch is fixedly arranged at the top of the right side of the power supply power grid.

The beneficial effects of the utility model are as follows: the direct current bus in the frequency converter of the control cabinet is connected with the electric energy feedback device, and the elevator electric energy feedback device automatically detects the direct current bus voltage of the frequency converter to change the direct current inverse of the direct current link of the frequency converter into alternating current with the same frequency and the same phase as the power grid voltage, the electricity saving rate reaches more than 97% through multiple energy conversion rates, and reaches 15% -50%, and the electricity saving rate can be changed along with the type and the use frequency of the elevator. Because the electric quantity is recovered, the braking resistor does not generate heat any more, so that the heat in the machine room can be greatly reduced, the usage amount of an air conditioner in the machine room can be reduced, the usage amount of the air conditioner can be reduced by 50-80% generally, and larger energy saving amount can be brought to the air conditioner; the heat is reduced, and the machine room environment is improved.

Drawings

FIG. 1 is a block diagram provided by the present utility model;

FIG. 2 is an enlarged view of area A of FIG. 1 in accordance with the present utility model;

FIG. 3 is a component assembly diagram provided by the present utility model;

FIG. 4 is a schematic diagram of the components provided by the present utility model;

in the figure: elevator shaft 1, power supply grid 2, distribution box 3, line one 4, rectifier bridge 5, line two 6, direct current bus 7, inverter bridge 8, brake resistor 9, line three 10, electric energy feedback device 11, frequency converter control cabinet 12, line four 13, servo motor 14, roller one 15, traction rope 16, machine room 17, elevator 18, roller two 19, counterweight 20, detection module 21, DSP central processing unit 22, PWM rectifier 23, protection circuit 24, IGBT inverter 25, ILC filter 26, three-phase AC grid 27, switch 28.

Detailed Description

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

Referring to fig. 1-4, the energy-saving elevator provided by the utility model comprises an elevator shaft 1 and a variable frequency control cabinet 12, a machine room 17 is fixedly arranged at the top of the elevator shaft 1, a power supply grid 2 is fixedly arranged at the top of the inner wall of the machine room 17, a power distribution box 3 is fixedly arranged at the left side of the power supply grid 2, a first line 4 is fixedly connected to the bottom of the power distribution box 3, a rectifier bridge 5 is fixedly arranged at the top of the left side of the inner wall of the variable frequency control cabinet 12, a rectifier bridge 5 is fixedly connected to the bottom of the first line 4, a second line 6 is fixedly arranged at the bottom of the rectifier bridge 5, a direct current bus 7 is fixedly connected to the bottom of the second line 6 through a wire, an inverter bridge 8 is fixedly connected to the bottom of the direct current bus 7, a third line 10 is fixedly connected to the top of the direct current bus 7, a fourth line 13 is fixedly connected to the left side of the inverter bridge 8, a servo motor 14 is fixedly connected to the left side of the fourth line 13, a roller 15 is fixedly connected to the output end of the servo motor 14, a traction rope 16 is fixedly connected to the bottom of the elevator 18, a roller 19 is fixedly arranged at the bottom of the machine room 17, a roller 19 is fixedly arranged at the bottom of the bracket, a traction rope 19 is fixedly connected to the outer wall of the roller 19, a traction rope 16 is slidably connected to the power supply grid 2, a power supply device is fixedly connected to the power supply grid 2, a power supply grid 2 is arranged at the power supply grid 2, a power supply grid 2 is arranged on the power supply grid 2, a current control device is arranged on the power supply grid 2, and a current control device is used for conveying a common person is used to instruct a power supply device is used to rotate, and a power supply device is used to be a power supply, and a speed is a power station is a speed to a power station device is used to a person. Part of the products in the variable frequency control cabinet 14 are provided with a power frequency switching function to ensure that when the frequency converter fails, the motor is switched back to a power frequency power supply through an automatic control loop, the rectifying action of the rectifying bridge 5 is completed by the unidirectional conduction principle of a diode, and the diode is normally conducted and reversely cut off, that is, the diode only allows the positive pole to be charged with positive electricity and the negative pole to be charged with negative electricity. The diode only allows current to pass through unidirectionally, so that when the diode is connected into an alternating current circuit, the current in the circuit flows unidirectionally, the direct current bus is used for providing power for the inverter bridge 8, and the inverter bridge 8 can convert direct current power into required alternating current power. The switching device can be turned on and off within a determined time, the switching device can be output, the function of a protection circuit can be realized, the servo motor 14 and the circuits can be controlled and protected under the functions of the components, after a command is manually input, the servo motor 14 drives the roller I15 to rotate, and the roller I15 is in transmission connection with the roller II 19 through the traction rope 16, so that the elevator 18 and the counterweight 20 are driven to lift.

Further, the top of the direct current bus 7 is fixedly connected with a brake resistor 9 through an electric wire, the top of the right side of the third line 10 is fixedly connected with an electric energy feedback device 11, the elevator 18 brake resistor 9 is an energy consumption component and mainly used for consuming electric energy generated in the braking process of the servo motor 14, the electric energy feedback device 11 converts direct current electric energy generated in the braking process of the servo motor 14 into an alternating current sine wave which is synchronous and in phase with the source of the electric network 2, the electric energy feedback device 11 feeds back the electric energy to the electric network 2 for recycling, a switch 28 is fixedly arranged at the top of the right side of the electric network 2, and the switch 28 is a total power switch of the elevator 18;

further, a detection module 21 is fixedly installed at the top of the interior of the electric energy feedback device 11, the bottom of the detection module 21 is fixedly connected with a DSP central processing unit 22 through a data line, the left end and the right end of the DSP central processing unit 22 are respectively fixedly connected with a PWM rectifier 23 and a protection circuit 24 through a data line, the bottom of the DSP central processing unit 22 is fixedly connected with the PWM rectifier 23 through a data line, the bottom of the PWM rectifier 23 is fixedly connected with the protection circuit 24 through a data line, the bottom of the protection circuit 24 is fixedly connected with an IGBT inverter 25 through a data line, the bottom of the IGBT inverter 25 is fixedly connected with an ILC filter 26 through a data line, the bottom of the ILC filter 26 is fixedly connected with a three-phase alternating current power grid 27, the detection module 21 is used for detecting various currents and voltages, the DSP central processing unit 22 has the function of intelligently self-diagnosing output voltage, preventing the current from returning and preventing the frequency converter from being affected by any, the PWM rectifier works in a rectification state, the grid PWM rectifier 23 uses PWM to control the current and the voltage of an alternating current power grid to be in phase, the IGBT inverter 25 enables the output voltage to be in direct proportion to the working frequency under the control of PWM, the servo motor 14 obtains constant torque, meanwhile, the current input to the servo motor 14 is sine wave, the loss of higher harmonic current is reduced, when the servo motor 14 works in a power generation state, the energy generated by the servo motor 14 charges the ILC filter 26 through the motor side PWM inverter 23, when the direct current voltage at two ends of the ILC filter 26 capacitor is larger than the extreme value, the IGBT inverter 25 in the grid PWM rectifier 23 feeds back the energy to the three-phase alternating current power grid 27 under the control of PWM, the bidirectional flow of the energy is completed, the power factor of the whole system is 1, the harmonic influence on the three-phase alternating current power grid 27 is eliminated, the protection circuit 24 protects the circuit inside the whole electric energy feedback device 11;

the application process of the utility model is as follows: when the servo motor 14 works, the servo motor 14 inevitably generates electricity, namely, the servo motor 14 rotates to be larger than the synchronous rotating speed output by the frequency converter, the electric energy generated by the servo motor 14 is stored in a voltage stabilizing capacitor in the frequency converter, which is larger than the synchronous rotating speed output by the frequency converter, the electric energy generated by the servo motor 14 is consumed by the braking resistor 9 in the voltage stabilizing capacitor, which is larger than the synchronous rotating speed output by the frequency converter, the electric energy generated by the servo motor 14 in the braking process is consumed by the electric energy feedback device 11, the direct current electric energy generated by the servo motor 14 in the braking process is converted into an alternating current sine wave which is synchronous and in phase with the source of the electric power grid 2, and after a multiple noise filtering link, the electric energy feedback device 11 feeds back the electric energy to the electric power grid 2 for recycling, so that the electric current which is consumed by the braking resistor 9 is consumed is recycled through reversing, and the current saving effect is realized.

The above description is of the preferred embodiments of the present utility model, and any person skilled in the art may modify the present utility model or make modifications to the present utility model with the technical solutions described above. Therefore, any simple modification or equivalent made according to the technical solution of the present utility model falls within the scope of the protection claimed by the present utility model.

Claims

1. An energy-saving elevator, which is characterized in that: including elevator well (1) and frequency conversion switch board (12), elevator well (1) top fixed mounting has computer lab (17), computer lab (17) inner wall top fixed mounting has power supply grid (2), power supply grid (2) left side fixed mounting has block terminal (3), block terminal (3) bottom fixedly connected with circuit one (4), frequency conversion switch board (12) inner wall left side top fixed mounting has rectifier bridge (5), circuit one (4) bottom fixedly connected with rectifier bridge (5), rectifier bridge (5) bottom fixed mounting has circuit two (6), circuit two (6) right side fixedly connected with direct current busbar (7) bottom is through electric wire fixedly connected with contravariant bridge (8).

2. An energy-saving elevator according to claim 1, characterized in that: the top of the direct current bus (7) is fixedly connected with a brake resistor (9) through an electric wire, the top of the direct current bus (7) is fixedly connected with a third circuit (10), and the top of the right side of the third circuit (10) is fixedly connected with an electric energy feedback device (11).

3. An energy-saving elevator according to claim 1, characterized in that: the left side fixedly connected with circuit IV (13) of contravariant bridge (8), circuit IV (13) left side fixedly connected with servo motor (14), servo motor (14) output fixed mounting has gyro wheel one (15), gyro wheel one (15) outer wall sliding connection has haulage rope (16).

4. An energy-saving elevator according to claim 3, characterized in that: the elevator is characterized in that an elevator (18) is fixedly connected to the bottom of the traction rope (16), a second roller (19) is fixedly installed at the bottom of the machine room (17) through a support, the traction rope (16) is slidably connected to the outer wall of the second roller (19), and a counterweight (20) is fixedly connected to one end of the traction rope (16) connected with the second roller (19).

5. An energy-saving elevator according to claim 2, characterized in that: the intelligent electric energy feedback device is characterized in that a detection module (21) is fixedly arranged at the top of the inside of the electric energy feedback device (11), a DSP central processing unit (22) is fixedly connected to the bottom of the detection module (21) through a data line, and a PWM rectifier (23) and a protection circuit (24) are respectively fixedly connected to the left end and the right end of the DSP central processing unit (22) through the data line.

6. An energy efficient elevator according to claim 5, characterized in that: the bottom of the DSP central processing unit (22) is fixedly connected with the PWM rectifier (23) through a data line, the bottom of the PWM rectifier (23) is fixedly connected with the protection circuit (24) through a data line, and the bottom of the protection circuit (24) is fixedly connected with the IGBT inverter (25) through a data line.

7. An energy-saving elevator according to claim 6, characterized in that: the bottom of the IGBT inverter (25) is fixedly connected with an ILC filter (26) through a data line, the bottom of the ILC filter (26) is fixedly connected with a three-phase alternating current power grid (27), and a switch (28) is fixedly arranged at the top of the right side of the power supply power grid (2).