CN219341352U

CN219341352U - Explosion-proof elevator

Info

Publication number: CN219341352U
Application number: CN202320001036.6U
Authority: CN
Inventors: 张欣; 吴广宇; 杨路
Original assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Guangzhou Engineering Co Ltd
Current assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Guangzhou Engineering Co Ltd
Priority date: 2023-01-03
Filing date: 2023-01-03
Publication date: 2023-07-14
Anticipated expiration: 2033-01-03

Abstract

The utility model discloses an explosion-proof elevator. The explosion-proof elevator is provided with a ground fence, a underframe (1), a guide rail frame (2), a car (4), a motor (11), a main power supply loop, a standby power supply loop, an electrical control cabinet (6) and the like. One end of the main power supply loop cable is connected with a three-phase alternating current power supply (15), the other end of the main power supply loop cable is connected with a motor, and a circuit breaker, a first contactor and a thermal protector are arranged on the main power supply loop cable. One end of the standby power supply loop cable is connected with the part of the main power supply loop cable between the first contactor and the thermal protector, the other end of the standby power supply loop cable is connected with the standby power battery pack (7), and the standby power supply loop cable is provided with a second contactor. The standby power battery pack is a direct-current battery pack and is arranged in the battery explosion-proof box (8). The utility model is mainly used for large-scale equipment or high-rise buildings in flammable and explosive and fire hazard areas in petrochemical industry and other industries.

Description

Explosion-proof elevator

Technical Field

The utility model belongs to the technical field of elevators, and relates to an explosion-proof elevator.

Background

Petrochemical plants are typically equipped with a number of towers, reactors, vessels, tanks, and other related high-rise structures (hereinafter referred to as large-scale equipment or high-rise buildings). These large equipment or tall buildings are often placed in flammable and explosive and fire hazard areas where they are in danger. In recent years, explosion-proof elevators have been provided for a large number of devices or high-rise buildings. Explosion-proof elevators are special equipment, usually powered by a three-phase ac power supply from a municipal or factory power grid. Once the three-phase ac power supply is powered off due to a fire or other accident, the explosion-proof elevator cannot be used.

Disclosure of Invention

The utility model aims to provide an explosion-proof elevator, which solves the problem that the existing explosion-proof elevator cannot be used when a three-phase alternating current power supply is powered off.

In order to solve the problems, the utility model adopts the following technical scheme: an explosion-proof elevator is equipped with ground rail and chassis, guide rail frame, car, motor, reduction gear, stopper, transmission system, main power supply loop, electrical control cabinet, and the one end of main power supply loop cable links to each other with three-phase alternating current power supply, and the other end of main power supply loop cable links to each other with the motor, follows the direction from three-phase alternating current power supply to motor, is equipped with circuit breaker, first contactor and thermal protector on the main power supply loop cable in proper order, its characterized in that: the explosion-proof elevator is also provided with a standby power supply loop, one end of a standby power supply loop cable is connected with a part of the main power supply loop cable, which is positioned between the first contactor and the thermal protector, the other end of the standby power supply loop cable is connected with a standby power battery pack, a second contactor is arranged on the standby power supply loop cable, and the standby power battery pack is a direct-current battery pack and is arranged in the battery explosion-proof box.

The utility model has the following beneficial effects: (1) Normally, an explosion-proof elevator is powered by a three-phase ac power supply of a municipal or factory power grid. When the three-phase alternating current power supply is powered off due to fire or other accidents, the explosion-proof elevator is powered by the standby power battery pack. Therefore, when the three-phase alternating current power supply cannot supply power, the explosion-proof elevator can be normally used. (2) When the explosion-proof elevator is in an electric driving working condition, the explosion-proof elevator is mainly powered by a three-phase alternating current power supply. And when the electric quantity of the three-phase alternating current power supply is unstable or insufficient, the standby power battery pack is used for supplying power in a supplementing mode. When the explosion-proof elevator is in a braking and power generation working condition, the motor can charge the standby power battery pack. Therefore, the three-phase alternating current power supply can be stabilized, the stable operation of the explosion-proof elevator can be ensured, and the standby power battery pack can be charged, so that the energy is saved. (3) The explosion-proof elevator adopts various explosion-proof and fireproof measures, and can be safely operated and used in flammable and explosive and fire hazard occasions.

The utility model is mainly used for large-scale equipment or high-rise buildings in flammable and explosive and fire hazard areas in petrochemical industry and other industries.

The utility model will be described in further detail with reference to the drawings and the detailed description. The drawings and detailed description are not intended to limit the scope of the utility model as claimed.

Drawings

Fig. 1 is a schematic partial structure of a first embodiment of the explosion-proof elevator of the present utility model.

Fig. 2 is a right side view of the explosion-proof elevator shown in fig. 1.

Fig. 3 is a partial schematic structural view of a second embodiment of the explosion-proof elevator of the present utility model.

Fig. 4 presents a schematic view of a main power supply loop and a standby power supply loop of the explosion-proof elevator of the utility model.

Fig. 5 presents a schematic view of another main power supply loop and a reserve power supply loop of the explosion-proof elevator of the utility model.

In fig. 1 to 5, the same reference numerals denote the same technical features. Reference numerals denote: 1-ground rail and chassis; 2-a guide rail frame; 3-large-scale equipment or high-rise buildings; 4-a car; 5-wall attaching frame; 6-an electrical control cabinet; 7-a standby power battery pack; 8-an explosion-proof battery box; 91-a first contactor; 92-a second contactor; 10-a rack; 11-an electric motor; 12-a speed reducer; 13-a brake; 14-a circuit breaker; 15-three-phase alternating current power supply; 16-a thermal protector; 17-a transformer; 18-an inverter; 19-a cable trough box; 20-a main power supply loop cable leading from the cable tray 19; 21-a cable pulley; 22-a wire supporting frame; 23-rectifier.

Detailed Description

Referring to fig. 1 to 5, the explosion-proof elevator of the present utility model is provided with a floor rail and underframe 1, a guide rail frame 2, a car 4, a motor 11, a decelerator 12, a brake 13, a transmission system, a main power supply circuit, and an electrical control cabinet 6. The car 4 is mounted on the guide rail frame 2 and is movable up and down along the guide rail frame 2 by a transmission system. The transmission system is generally a rack-and-pinion transmission system or a wire rope pulley type transmission system; the explosion-proof elevator shown in fig. 2 and 3 employs a rack-and-pinion drive system, reference numeral 10 indicating a rack, the pinion not being shown. The motor 11 transmits power to the transmission system through the speed reducer 12. The guide rail frame 2 is vertically or obliquely arranged beside the large-scale equipment or the high-rise building 3, and the guide rail frame 2 is fixedly connected with the outer wall or the outer wall of the large-scale equipment or the high-rise building 3 by using the wall attaching frame 5. In fig. 1 an explosion-proof elevator is shown, as well as a large installation or high-rise building 3.

The main power supply circuit comprises a main power supply circuit cable, one end of which is connected to a three-phase ac power supply 15 of the municipal or factory power grid, and the other end of which is connected to the motor 11. The three-phase alternating current power supply 15 is the main power supply of the explosion-proof elevator. A circuit breaker 14, a first contactor 91 and a thermal protector 16 are provided in this order on the main power supply loop cable in the direction from the three-phase ac power supply 15 to the motor 11. The explosion-proof elevator is also provided with a standby power supply loop, which comprises a standby power supply loop cable, one end of which is connected with the part of the main power supply loop cable between the first contactor 91 and the thermal protector 16, and the other end of which is connected with the standby power battery 7, and a second contactor 92 is arranged on the standby power supply loop cable. The standby power battery pack 7 is a direct current battery pack and is arranged in the battery explosion-proof box 8.

In fig. 4, the motor 11 is a three-phase asynchronous motor. The portion of the backup power supply circuit cable between the second contactor 92 and the backup power battery 7 is provided with the transformer 17 and the inverter 18 in this order in the direction from the second contactor 92 to the backup power battery 7. The circuit breaker 14, the first contactor 91, the thermal protector 16, the second contactor 92, the transformer 17, and the inverter 18 are provided within the electrical control cabinet 6.

In fig. 5, the motor 11 is a dc motor. The portion of the main power supply circuit cable between the circuit breaker 14 and the first contactor 91 is provided with a transformer 17 and a rectifier 23 in this order in the direction from the circuit breaker 14 to the first contactor 91. The circuit breaker 14, the transformer 17, the rectifier 23, the first contactor 91, the thermal protector 16, and the second contactor 92 are provided within the electrical control cabinet 6.

The main power supply circuit according to the present utility model includes a main power supply circuit cable, and a three-phase ac power supply 15 and various components (excluding the motor 11) connected to the main power supply circuit cable. The backup power supply circuit includes a backup power supply circuit cable, a backup power battery pack 7 connected to the backup power supply circuit cable, and various components.

The backup power battery 7 used in the present utility model is typically a lead-acid battery, a nickel-hydrogen battery or a lithium battery, or an electric storage device formed by combining the above batteries with a capacitor. The capacity of the standby power battery pack 7 needs to meet the electricity consumption of the lift car 4 for a plurality of times of lifting and reciprocating along the guide rail frame 2, or the lift car 4 can continuously lift and run for 0.5-1.5 hours.

The battery explosion-proof box 8 and the electrical control cabinet 6 are of an explosion-proof type, for example, an explosion-proof type casing is adopted.

The backup power battery pack 7, the battery explosion-proof box 8 and the electrical control cabinet 6 may be provided on the ground as shown in fig. 1. The cable of the main power supply loop is led out from the electrical control cabinet 6, enters a cable groove box 19 on the guide rail frame 2 through the ground (not shown), and is led out from the cable groove box 19. In fig. 1, reference numeral 20 denotes a main power supply loop cable led out from the cable tray 19, reference numeral 21 denotes a cable block, and reference numeral 22 denotes a wire holding frame. The main power supply loop cable 20, the cable pulley 21, the cable support 22, the backup power battery 7, the battery explosion-proof box 8 and the electrical control cabinet 6, which are led out from the cable tray box 19, are not shown in fig. 2. When the standby power battery pack 7, the battery explosion-proof box 8 and the electrical control cabinet 6 are arranged on the ground, the standby power battery pack 7 and the battery explosion-proof box 8 can be arranged far away from the inflammable and explosive medium area (for example, arranged outside the fire dike of the storage tank), and then the buried cable is used for being communicated to the electrical control cabinet 6. The spare power battery pack 7 and the battery explosion-proof box 8 may also be disposed close to the rail frame 2.

A backup power battery pack 7, a battery explosion proof box 8 and an electrical control cabinet 6 may also be provided on the car 4 as shown in fig. 3. The main supply loop cable leading from the electrical control cabinet 6 may be connected to the motor 11 in close proximity. The cables from the three-phase ac power supply 15 to the electrical control cabinet 6 are arranged in a conventional manner, and detailed description and drawings are omitted.

In flammable and explosive and fire hazard situations, such as the situations where petrochemical devices or oil storage tanks are located in oil refineries, chemical plants and the like, the explosion-proof elevator adopts explosion-proof and fireproof measures. The battery explosion proof box 8 is of an explosion proof design, for example, an explosion proof "d" housing. All strong electric equipment and circuits of the explosion-proof elevator adopt explosion-proof electric equipment and fireproof flame-retardant cable wiring, and the equipment generally adopts explosion-proof d or security-enhanced e electric equipment. In all weak current equipment and circuits of the explosion-proof elevator, explosion-proof electrical equipment and flame-retardant cables are adopted, and the equipment generally adopts intrinsic safety type 'ia' or 'ib' electrical equipment. All friction mechanical parts in the explosion-proof elevator are required to adopt explosion-proof measures, including spraying spark-free materials on the surfaces of the mechanical parts or adopting spark-free materials as a whole. For example, the gear rack transmission mechanism is lubricated regularly, and the gears are made of bronze or stainless steel materials; the surface of the elevator pulley or the guide wheel is made of copper, stainless steel materials or nonmetallic materials; the surface of the wheel of the cable trolley or the cable pulley 21 is made of copper, stainless steel materials or nonmetallic materials; the brake wheel and the brake pad of the brake 13 are arranged in the explosion-proof shell; the outer surfaces of the guide rail frame 2, the wall attaching frame 5, the platform and the like are sprayed with fireproof paint.

Several (e.g., 2-6) explosion-proof elevators according to the present utility model may be installed around the large-sized equipment or the high-rise building 3, and when one of the explosion-proof elevators fails, a person may select the remaining ones for use. The explosion-proof elevator can be matched with common maintenance channels such as a straight ladder or a climbing ladder and the like to be used, and is uniformly distributed around large-scale equipment or high-rise buildings 3. The relevant figures are omitted.

When the explosion-proof elevator of the utility model adopts the main power supply loop and the standby power supply loop shown in fig. 4, the explosion-proof elevator is normally powered by the three-phase alternating current power supply 15. The circuit breaker 14, the first contactor 91 and the thermal protector 16 are closed, the second contactor 92 is opened, and the ac power output from the three-phase ac power source 15 is input to the motor 11 via the main power supply loop cable. When the three-phase ac power supply 15 is powered off due to a fire or other accident, the thermal protector 16 and the second contactor 92 are closed, the first contactor 91 is opened, and the circuit breaker 14 is closed or opened. The dc power output from the backup power battery 7 is converted into ac power by the inverter 18, transformed by the transformer 17, and input to the motor 11 via the backup power supply loop cable and the main power supply loop cable.

When the explosion-proof elevator of the utility model adopts the main power supply loop and the standby power supply loop shown in fig. 5, the explosion-proof elevator is normally powered by the three-phase alternating current power supply 15. The circuit breaker 14, the first contactor 91 and the thermal protector 16 are closed and the second contactor 92 is opened. The ac power output from the three-phase ac power supply 15 is transformed by the transformer 17, converted into dc power by the rectifier 23, and input to the motor 11 via the main power supply loop cable. When the three-phase ac power supply 15 is powered off due to a fire or other accident, the thermal protector 16 and the second contactor 92 are closed, the first contactor 91 is opened, and the circuit breaker 14 is closed or opened. The direct current output from the backup power battery pack 7 is input to the motor 11 via the backup power supply loop cable and the main power supply loop cable.

With the primary and backup power supply circuits shown in fig. 4 and 5, both the primary and backup power supply circuits are normally turned on when the circuit breaker 14, the first contactor 91, the thermal protector 16, and the second contactor 92 are all closed. When the explosion-proof elevator is in the electric driving working condition, the explosion-proof elevator is mainly powered by the three-phase alternating current power supply 15. The backup power battery pack 7 is supplied with power when the three-phase alternating current power supply 15 is unstable or insufficient in electric quantity. When the explosion-proof elevator is in a braking and power generating working condition, the motor 11 can charge the standby power battery pack 7.

The opening and closing of the circuit breaker 14, the first contactor 91, the thermal protector 16, and the second contactor 92 described above may be manually or automatically switched. The automatic switching may be performed automatically by using an automatic control device (e.g., a programmable controller) commonly used in the art, by programming and adjusting the device according to the description of the present utility model.

The power of the backup power battery 7 may be monitored using a low voltage alarm monitoring device. If the electric quantity of the standby power battery pack 7 is insufficient, the low-voltage alarm monitoring device can send an alarm signal to remind an operation maintainer to overhaul or replace the standby power battery pack 7 immediately.

Claims

1. An explosion-proof elevator is provided with a ground fence and an underframe (1), a guide rail frame (2), a car (4), a motor (11), a speed reducer (12), a brake (13), a transmission system, a main power supply loop and an electrical control cabinet (6), wherein one end of a main power supply loop cable is connected with a three-phase alternating current power supply (15), the other end of the main power supply loop cable is connected with the motor (11), and a breaker (14), a first contactor (91) and a thermal protector (16) are sequentially arranged on the main power supply loop cable along the direction from the three-phase alternating current power supply (15) to the motor (11), and the explosion-proof elevator is characterized in that: the explosion-proof elevator is also provided with a standby power supply loop, one end of the standby power supply loop cable is connected with the part of the main power supply loop cable between the first contactor (91) and the thermal protector (16), the other end of the standby power supply loop cable is connected with the standby power battery pack (7), the standby power battery pack (7) is a direct current battery pack and is arranged in the battery explosion-proof box (8).

2. The explosion-proof elevator according to claim 1, characterized in that: the motor (11) is a three-phase asynchronous motor, and a transformer (17) and an inverter (18) are sequentially arranged at the part of the standby power supply loop cable between the second contactor (92) and the standby power battery pack (7) along the direction from the second contactor (92) to the standby power battery pack (7).

3. The explosion-proof elevator according to claim 1, characterized in that: the motor (11) is a direct current motor, and a transformer (17) and a rectifier (23) are sequentially arranged at a part of the main power supply loop cable between the circuit breaker (14) and the first contactor (91) along the direction from the circuit breaker (14) to the first contactor (91).

4. An explosion-proof elevator according to claim 1 or 2 or 3, characterized in that: the standby power battery pack (7) is a lead-acid battery, a nickel-hydrogen battery or a lithium battery or is electric storage equipment formed by combining the batteries and a capacitor.

5. An explosion-proof elevator according to claim 1 or 2 or 3, characterized in that: the battery explosion-proof box (8) is of an explosion-proof type.