Guide rail type power supply system on elevator car
By using conductive strips and flexible conductive devices in the elevator system, the problem of easy damage to the traveling cable was solved, a stable power supply was achieved in the elevator car, and safety was improved.
Patent Information
- Application Number
- CN202511168726.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2025-11-11
AI Technical Summary
In existing elevator systems, the traveling cable is easily damaged during the car's movement, posing a safety hazard.
The system employs conductive strips and elastic conductive devices. The conductive strips are fixed to the guide rails, while the elastic conductive devices are installed on the car. Electrical continuity is maintained through elastic contact, and the voltage is processed by the power supply circuit, thus avoiding the use of traveling cables.
This ensures a stable power supply during elevator car movement, avoiding damage to the traveling cable and the risk of electric shock, thus improving safety.
Smart Images
Figure CN120922709A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of elevator car power supply, and specifically to a rail-mounted power supply system for elevator cars. Background Technology
[0002] like Figure 1 As shown, in the prior art, the elevator system includes: a car 11, a lighting device, a wire rope 12, a traction machine 13, an elevator shaft 14, a guide rail 15, a power supply device, and a counterweight 16. A main machine room is provided at the top of the elevator shaft 14, and a connecting hole is provided at the bottom of the main machine room to connect the main machine room with the inside of the elevator shaft 14. The main machine room is equipped with the traction machine 13 and the power supply device. The power supply device supplies power to the traction machine 13. The output end of the traction machine 13 is a traction sheave, and the wire rope 12 is wound around the traction sheave. One end of the wire rope 12 is fixed to the car 11, and the other end of the wire rope 12 is fixed to the counterweight 16. The traction machine 13 drives the car 11 to rise and fall by driving the wire rope 12 to move. A guide rail 15 is installed in the elevator shaft 14 to guide the car 11 and the counterweight 16 to rise and fall. A lighting device is installed in the car 11, and the output end of the power supply device supplies power to the lighting device through a traveling cable 17.
[0003] Although the elevator system described above achieves power supply through a traveling cable, it still has the following drawbacks: the traveling cable 17 is installed between the car 11 and the power supply device. The traveling cable 17 moves up and down with the car 11. The long-term pulling or pushing of the traveling cable 17 makes it easy for the traveling cable 17 to break, and it is easy for voltage to come into contact with the car 11, resulting in electric shock and other safety accidents. Summary of the Invention
[0004] The present invention provides a rail-mounted power supply system for elevator cars, which solves the problem in the prior art where the traveling cable installed between the car and the power supply device is easily damaged by pulling.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] This invention discloses an elevator car upper rail type power supply system, including: a power supply device, a conductive strip, a strip mounting device, an elastic conductive device, and a power supply processing circuit; the power supply device is installed at the top of the elevator shaft in the elevator system, the conductive strip is installed on the guide rail in the elevator system through the strip mounting device, the conductive strip is located in the vertical direction, the conductive strip elastically contacts the elastic conductive device, the elastic conductive device is electrically connected to the conductive strip, the output end of the elastic conductive device is connected to the input end of the power supply processing circuit, and the output end of the power supply processing circuit is the output end of the elevator car upper rail type power supply system.
[0007] Preferably, the elastic conductive device includes: a mounting base, a conductive rod, a spring, and a connecting wire. The mounting base is installed on the car in the elevator system. The conductive rod is mounted on the mounting base and can move relative to the mounting base in a direction perpendicular to the conductive strip. One end of the conductive rod is used for electrical contact with the conductive strip, and the other end of the conductive rod is connected to a connecting wire, which is the output end of the elastic conductive device. A spring is installed between the conductive rod and the mounting base, and the spring force is used to press the conductive rod tightly onto the conductive strip.
[0008] Preferably, the end of the conductive rod that is in close contact with the conductive strip has a hemispherical structure.
[0009] Preferably, the power supply processing circuit includes a charging / discharging module and a boost module, wherein the input terminal of the boost module is the input terminal of the power supply processing circuit, the output terminal of the boost module is the output terminal of the power supply processing circuit, and the charging / discharging terminal of the charging / discharging module is connected to the input terminal of the boost module.
[0010] Preferably, the power supply processing module further includes: a current limiting module, the input terminal of which is connected to the output terminal of the elastic conductive device, and the output terminal of which is connected to the charging and discharging terminal of the charging and discharging module and the input terminal of the boost module.
[0011] Preferably, the boost module is equipped with a resistance adjustment unit, which is used to adjust the boost ratio of the boost module.
[0012] Preferably, the resistance adjustment unit includes: a first resistance providing unit, a second resistance providing unit, a short-circuit switch unit, and a comparator unit. The first end of the first resistance providing unit is connected to the adjustment end of the boost module, the second end of the first resistance providing unit is connected to the first end of the second resistance providing unit, the second end of the second resistance providing unit is connected to the output end of the boost module, the first end of the first resistance providing unit is connected to the second end of the first resistance providing unit through the short-circuit switch unit, the comparator unit is connected to the input end of the current limiting module, and the output end of the comparator unit is connected to the control end of the short-circuit switch unit.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] In this application, the traveling cable is no longer used. Instead, a conductive strip and an elastic conductive device are fixed on the guide rail. The elastic conductive device is installed on the car and can rise and fall with the car. The elastic conductive device is always in contact with the conductive strip to achieve electrical conduction. Then, a power supply processing circuit is used to process it into the required voltage for the use of the lighting device in the car.
[0015] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description
[0016] Figure 1 This is a structural diagram of an elevator system in the prior art.
[0017] Figure 2 This is a schematic diagram of the elevator car upper guide rail power supply system installed behind the elevator system in this application.
[0018] Figure 3 This is a cross-sectional view of the elastic conductive device and the conductive strip.
[0019] Figure 4 The circuit diagram for the power supply processing circuit.
[0020] Reference numerals: Car 11, Wire rope 12, Traction machine 13, Elevator shaft 14, Guide rail 15, Counterweight 16, Traveling cable 17, Conductive strip 21, Strip mounting device 22, Elastic conductive device 23, Mounting base 231, Conductive rod 232, Spring 233, Connecting wire 234. Detailed Implementation
[0021] To make the technical means, creative features, objectives, and effects of this invention clearer and easier to understand, the invention will be further described below in conjunction with the accompanying drawings and specific embodiments:
[0022] like Figure 2 as well as Figure 3 As shown, this invention discloses a power supply system for the upper guide rail 15 of an elevator car 11, including: a power supply device (not shown), a conductive strip 21, a strip mounting device 22, an elastic conductive device 23, and a power supply processing circuit; the power supply device is installed on the top of the elevator shaft 14 in the elevator system, the conductive strip 21 is installed on the guide rail 15 in the elevator system through the strip mounting device 22, the conductive strip 21 is located in the vertical direction, the conductive strip 21 elastically contacts the elastic conductive device 23, the elastic conductive device 23 is electrically connected to the conductive strip 21, the output terminal of the elastic conductive device 23 is connected to the input terminal IN1 of the power supply processing circuit, and the output terminal OUT1 of the power supply processing circuit is the output terminal of the power supply system for the upper guide rail 15 of the elevator car 11.
[0023] In this application, the strip mounting device 22 is a fixed seat, and the conductive strip 21 is installed inside the fixed seat. The fixed seat is installed on the guide rail 15 in the elevator system.
[0024] In this application, the elastic conductive device 23 includes: a mounting base 231, a conductive rod 232, a spring 233, and a connecting wire 234. The mounting base 231 is installed on the car 11 of the elevator system. The conductive rod 232 is mounted on the mounting base 231 and can move relative to the mounting base 231 in a direction perpendicular to the conductive strip 21. One end of the conductive rod 232 is used for electrical contact with the conductive strip 21, and the other end of the conductive rod 232 is connected to the connecting wire 234. The connecting wire 234 is the output end of the elastic conductive device 23. A spring 233 is installed between the conductive rod 232 and the mounting base 231. The spring force of the spring 233 is used to press the conductive rod 232 tightly against the conductive strip 21, so that the conductive rod 232 remains in close contact with the conductive strip 21 during the raising and lowering of the entire elastic conductive device 23 along with the car 11, maintaining electrical continuity. The conductive rod 232 is made of conductive material. The mounting base 231 guides the movement of the conductive rod 232. By electrically connecting the connecting wire 234 to the input terminal of the power supply processing circuit, the output voltage of the power supply device can be connected to the power supply processing circuit. The connecting wire 234 does not obstruct the movement of the conductive rod 232.
[0025] Preferably, the end of the conductive rod 232 that is in close contact with the conductive strip 21 has a hemispherical structure. Of course, the end of the conductive rod 232 that is in close contact with the conductive strip 21 can also be other shapes. The design of this hemispherical structure is to allow the conductive rod to slide smoothly on the conductive strip when it rises and falls with the car.
[0026] like Figure 4 As shown, the power supply processing circuit includes a charging / discharging module and a boost module. The input terminal of the boost module is the input terminal of the power supply processing circuit, and the output terminal of the boost module is the output terminal of the power supply processing circuit. The charging / discharging terminal of the charging / discharging module is connected to the input terminal of the boost module. The power supply device provides a voltage of 12V to the conductive strip. This voltage is relatively low to prevent leakage in the elevator car and potential electric shock accidents when the conductive rod and the conductive strip come into electrical contact. Therefore, the voltage provided by the power supply device to the conductive strip is relatively low to ensure that even if there is leakage, no electric shock accident will occur (12V voltage has no effect on the human body). Because the voltage provided by the power supply device to the conductive strip is relatively low, a boost module is designed to increase the voltage to meet the power supply needs of the lighting device inside the elevator car.
[0027] The charging and discharging module includes: a charging capacitor C4, with the positive terminal of the charging and discharging module being the charging and discharging terminal and the negative terminal of the charging capacitor C4 being grounded.
[0028] During the car's ascent and descent, the conductive rod slides on the conductive strip, held in place by a spring. In principle, this constant contact should prevent power outages. However, vibrations are inevitable during these movements. Since the conductive rod is mounted on the car, these vibrations cause it to vibrate relative to the conductive strip, potentially disrupting contact and leading to sudden power outages in the lighting system, causing panic among passengers. In other words, while the conductive rod and strip remain in contact for a period during ascent and descent, detachment is possible, preventing the power supply from reaching the processing module. Therefore, a charging / discharging module is necessary. This module connects to the output of the boost module, automatically discharging when the conductive rod detaches, providing voltage to the boost module's input and enabling it to supply power to the lighting system. Therefore, the charging and discharging module enables charging when the conductive rod is in contact with the conductive strip and discharging when the conductive rod is separated from the conductive strip, so that there is always voltage at the input terminal of the boost module and the phenomenon of the lighting device suddenly going out will not occur.
[0029] In this application, the power supply processing module further includes a current limiting module. The input terminal of the current limiting module is connected to the output terminal of the elastic conductive device, and the output terminal of the current limiting module is connected to the charging / discharging terminal of the charging / discharging module and the input terminal of the boost module. Since a reverse current flow during the charging / discharging module's discharge would cause the voltage of the charging / discharging module to drop too quickly, a current limiting module is designed.
[0030] Preferably, the current limiting module includes a diode D2, with the anode of diode D2 serving as the input terminal and the cathode of diode D2 serving as the output terminal. The anode of diode D2 is connected to the positive terminal of capacitor C5, and the negative terminal of capacitor C5 is grounded. Capacitor C5 serves as a voltage regulator.
[0031] In this application, a resistance adjustment unit is provided inside the boost module, which is used to adjust the boost ratio of the boost module.
[0032] Preferably, the resistance adjustment unit includes: a first resistance providing part, a second resistance providing part, a short-circuit switch part, and a comparator part. The first end of the first resistance providing part is connected to the adjustment terminal of the boost module, the second end of the first resistance providing part is connected to the first end of the second resistance providing part, the second end of the second resistance providing part is connected to the output terminal of the boost module, the first end of the first resistance providing part is connected to the second end of the first resistance providing part via the short-circuit switch part, the comparator part is connected to the input terminal of the current limiting module, and the output terminal of the comparator part is connected to the control terminal of the short-circuit switch part. Since the voltage of the charging / discharging module is sometimes low during discharge, if the voltage is still boosted proportionally even when the voltage is low, the voltage will not meet the requirements. Therefore, a resistance adjustment unit is designed to adjust the first resistance providing part from being short-circuited when the voltage is too low during discharge, thereby increasing the boost ratio; and to adjust the first resistance providing part to be short-circuited when the voltage is normal and the conductive rod and conductive strip are normally connected, thereby decreasing the boost ratio. This allows the output voltage of the boost module to be adjusted within the range of 36±5V, improving output stability.
[0033] The first resistance value providing part includes: resistor R5, the first end of resistor R5 is the first end of the first resistance value providing part, and the second end of resistor R5 is the second end of the first resistance value providing part.
[0034] The second resistance value providing part includes: resistor R4, the first end of resistor R4 is the first end of the second resistance value providing part, and the second end of resistor R4 is the second end of the second resistance value providing part.
[0035] The short-circuit switch includes: an NPN transistor Q1, the collector of which is connected to the first terminal of resistor R5; the emitter of which is connected to the second terminal of resistor R5; and the base of which is the control terminal of the short-circuit switch.
[0036] The comparator section includes resistors R6 and R7, and comparator U2. The first terminal of resistor R6 is connected to the DC power supply VCC (output voltage 9V), and the second terminal of resistor R6 is grounded through resistor R7. The second terminal of resistor R6 is also connected to the inverting input of comparator U2. The charging / discharging terminals of the charging / discharging module are connected to the non-inverting input of comparator U2. This ensures that when the voltage at the charging / discharging terminals of the charging / discharging module is relatively high, comparator U2 outputs a high level, NPN transistor Q1 is closed, and resistor R5 is short-circuited; conversely, when the voltage at the charging / discharging terminals of the charging / discharging module is relatively low, comparator U2 outputs a low level, NPN transistor Q1 is open, and resistor R5 is not short-circuited.
[0037] The boost module includes: boost chip U1, resistors R1, R2, and R3, diode D1, capacitors C1, C2, and C3, and inductor L1. Boost chip U1 uses the MC34063 model. The IPK pin of boost chip U1 is the input terminal of the boost module. The V+ pin of boost chip U1 is connected to the first terminal of resistor R2. The CINV pin of boost chip U1 is the adjustment terminal of the boost module. The CINV pin of boost chip U1 is connected to the first terminal of resistor R3. The second terminal of resistor R3 and the negative terminal of capacitor C3 are grounded, and the positive terminal of capacitor C3 is connected to... The first end of resistor R2 is connected to the first end of resistor R1 and one end of inductor L1. The second end of resistor R1 is connected to the DRC pin of boost chip U1. The other end of inductor L1 is connected to the SWC pin of boost chip U1. The SWC pin of boost chip U1 is connected to the anode of diode D1. The cathode of diode D1 is the output terminal of the boost module and is connected to the positive terminal of capacitor C2. The SWE pin and V- pin of boost chip U1 are both grounded. The CT pin of boost chip U1 is connected to the positive terminal of capacitor C1. The negative terminals of capacitor C1 and capacitor C2 are both grounded. The larger the ratio of (R5+R4) / R3, the larger the boost ratio.
[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A guide rail power supply system for elevator cars, characterized in that, include: Power supply device, conductive strip, strip mounting device, elastic conductive device, and power supply processing circuit; The power supply device is installed at the top of the elevator shaft in the elevator system. The conductive strip is installed on the guide rail of the elevator system through the strip mounting device. The conductive strip is located in the vertical direction and has elastic contact with the elastic conductive device. The elastic conductive device is electrically connected to the conductive strip. The output end of the elastic conductive device is connected to the input end of the power supply processing circuit. The output end of the power supply processing circuit is the output end of the guide rail power supply system on the elevator car.
2. The elevator car upper guide rail type power supply system according to claim 1, characterized in that, The elastic conductive device includes: a mounting base, a conductive rod, a spring, and a connecting wire. The mounting base is installed on the car in the elevator system. The conductive rod is mounted on the mounting base and can move relative to the mounting base in a direction perpendicular to the conductive strip. One end of the conductive rod is used for electrical contact with the conductive strip, and the other end of the conductive rod is connected to the connecting wire, which is the output end of the elastic conductive device. A spring is installed between the conductive rod and the mounting base, and the spring force is used to press the conductive rod tightly onto the conductive strip.
3. The elevator car upper guide rail type power supply system according to claim 2, characterized in that, The end of the conductive rod that is in close contact with the conductive strip has a hemispherical structure.
4. The elevator car upper guide rail type power supply system according to any one of claims 1 to 3, characterized in that, The power supply processing circuit includes a charging / discharging module and a boost module. The input terminal of the boost module is the input terminal of the power supply processing circuit, and the output terminal of the boost module is the output terminal of the power supply processing circuit. The charging / discharging terminal of the charging / discharging module is connected to the input terminal of the boost module.
5. The elevator car upper guide rail type power supply system according to claim 4, characterized in that, The power supply processing module also includes: a current limiting module, the input terminal of which is connected to the output terminal of the elastic conductive device, and the output terminal of which is connected to the charging and discharging terminal of the charging and discharging module and the input terminal of the boost module.
6. The elevator car upper guide rail type power supply system according to claim 5, characterized in that, The boost module is equipped with a resistance adjustment unit, which is used to adjust the boost ratio of the boost module.
7. The elevator car upper guide rail type power supply system according to claim 6, characterized in that, The resistance adjustment unit includes: a first resistance providing unit, a second resistance providing unit, a short-circuit switch unit, and a comparator unit. The first terminal of the first resistance providing unit is connected to the adjustment terminal of the boost module, the second terminal of the first resistance providing unit is connected to the first terminal of the second resistance providing unit, the second terminal of the second resistance providing unit is connected to the output terminal of the boost module, the first terminal of the first resistance providing unit is connected to the second terminal of the first resistance providing unit through the short-circuit switch unit, the comparator unit is connected to the input terminal of the current limiting module, and the output terminal of the comparator unit is connected to the control terminal of the short-circuit switch unit.