An explosion-proof elevator system and method of use thereof

Abstract

The application discloses an explosion-proof elevator system and a use method thereof. The explosion-proof elevator system is provided with an explosion-proof elevator, and the explosion-proof elevator is provided with an elevator shaft (1), a cage (5), a cage traction machine power system (4), a cage lifting system (3), a power supply circuit, a hook (66), a control box (67) and a winch hoisting system (6). The cage is provided with an escape window (51) and / or an escape door (52), and under normal working conditions, the hook and the control box are always located near the escape window or the escape door. The power supply circuit comprises a main power supply circuit, a cage motor main power supply circuit, a hook motor main power supply circuit and a standby power supply circuit, and a three-phase alternating current power supply and a standby power battery pack (9). The application discloses the use method of the explosion-proof elevator system. The application is mainly used for large-scale equipment or high-rise buildings in flammable and explosive fire hazard places and toxic hazard places in petrochemical industries.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of elevator technology, and relates to an explosion-proof elevator system and a use method thereof. BACKGROUND

[0002] In petrochemical production devices, many towers, reactors, containers, oil storage tanks and other related high-rise structures (hereinafter referred to as large equipment or high-rise buildings) are usually arranged. These large equipment or high-rise buildings are often in flammable and explosive fire hazard places and toxic hazard places. When an emergency such as fire or combustible and toxic gas leakage occurs, if the operator is at the top of the large equipment or high-rise building, or at other high-level operation platforms, he will be in a very dangerous situation and needs to be rescued quickly. Usually, the operator can only rely on the conventional operation platform, stairway and the like to choose an escape route to escape, and the escape efficiency is low. In the case where the trend of the accident is difficult to predict, the escape direction may be misjudged, the rescue time may be delayed, and the best rescue opportunity may be missed. Sometimes, the operator will choose an extremely dangerous way to escape (for example, holding a column or a drain pipe beside the large equipment or high-rise building to escape), which may endanger the health and even the life safety of the operator without the action of any safety protection facilities and deceleration mechanisms. China lacks high-altitude rescue equipment and special rescue and disaster relief equipment, and few factories are equipped with high-altitude fire fighting vehicles and special rescue and disaster relief vehicles. In addition, the high-altitude fire detection capability of the large equipment or high-rise building is weak, and currently few fire fighting helicopters for fire fighting and rescue tasks are used.

[0003] In recent years, many large equipment or high-rise buildings are provided with explosion-proof elevators. The explosion-proof elevator is a special equipment, which is usually powered by a three-phase alternating current power supply from a municipal or factory power grid. Once the three-phase alternating current power supply is powered off due to fire or other accidents, the explosion-proof elevator will stop running and cannot be used. Therefore, the existing explosion-proof elevator can only be used by the operator on a daily basis when the three-phase alternating current power supply is normally powered. In addition, the explosion-proof elevator will stop running and cannot be used due to power failure or other faults of the three-phase alternating current power supply, so it cannot be used as a fire fighting elevator for fire fighters to rescue the operator, perform fire fighting and detection operations; the fire fighters need to climb many stairs to approach the fire or combustible and toxic gas leakage accident site, which wastes the fire fighting and rescue time and increases the labor intensity. SUMMARY

[0004] The purpose of the present application is to provide an explosion-proof elevator system and a use method thereof, so as to solve the problem that the existing explosion-proof elevator cannot be used when the three-phase alternating current power supply is powered off and cannot be used as a fire fighting elevator.

[0005] To solve the above problems, the technical scheme adopted by the present application is: an explosion-proof elevator system is provided with an explosion-proof elevator, the explosion-proof elevator is provided with an elevator shaft, a car, a car traction motor power system, a car lifting system and a power supply circuit, the car traction motor power system is provided with a car motor, the power supply circuit includes a main power supply circuit and a car motor main power supply circuit, an input end of a main power supply circuit cable is connected with a three-phase alternating current power supply, an output end of the main power supply circuit cable is connected with an input end of a car motor main power supply circuit cable, and an output end of the car motor main power supply circuit cable is connected with the car motor, characterized in that: the explosion-proof elevator system is further provided with a hook, a control box and a winch hoisting system, the winch hoisting system controls the start-stop and lifting of the hook and the control box, the winch hoisting system is provided with a hook motor, the car is provided with an escape window and / or an escape door, under normal working conditions, the hook and the control box are always located near the escape window or the escape door, the power supply circuit further includes a hook motor main power supply circuit and a standby power supply circuit, an input end of a hook motor main power supply circuit cable is connected with an output end of the main power supply circuit cable, an output end of the hook motor main power supply circuit cable is connected with the hook motor, an input end of a standby power supply circuit cable is connected with a standby power battery pack, and output ends of the standby power supply circuit cable are respectively connected with the car motor main power supply circuit cable and the hook motor main power supply circuit cable.

[0006] The use method of the above explosion-proof elevator system is characterized in that: when the three-phase alternating current power supply normally supplies power, the three-phase alternating current power supply supplies power to the car motor through the main power supply circuit and the car motor main power supply circuit, and supplies power to the hook motor through the main power supply circuit and the hook motor main power supply circuit; when the three-phase alternating current power supply is powered off, the standby power battery pack supplies power to the car motor through the standby power supply circuit and the car motor main power supply circuit, and supplies power to the hook motor through the standby power supply circuit and the hook motor main power supply circuit; under normal working conditions, the hook and the control box are synchronously started, stopped and lifted with the car, and the hook and the control box are always located near the escape window or the escape door on the car.

[0007] When the car cannot move due to failure, the hook motor is powered by the three-phase alternating current power supply or the standby power battery pack, the personnel in the car open the escape window or the escape door to escape, hang on the hook, and use the control box to independently control the start-stop and steering of the hook motor, so that the personnel, the hook and the control box are lifted in the elevator shaft.

[0008] The present application has the following advantages: (1) Normally, the explosion-proof elevator is powered by the three-phase AC power supply of the municipal or factory power grid. When the three-phase AC power supply is powered off due to fire or other accidents, the explosion-proof elevator is powered by the backup power battery pack. Therefore, when the three-phase AC power supply cannot be powered, the explosion-proof elevator can also operate normally. (2) The explosion-proof elevator system of the present application is provided with a backup power battery pack, a hoist system, a hook, a control box, an escape window, an escape door, an antechamber, a evacuation corridor, etc., so that the explosion-proof elevator can be used as a fire elevator to rescue operators, perform fire fighting and reconnaissance operations, etc. (see the description of the specific embodiments in the specification for details); the labor intensity of the fire fighters can be reduced, and the work efficiency can be improved. (3) Under the condition that the three-phase AC power supply is normally powered and no accidents occur, the explosion-proof elevator of the present application can also be used as a common passenger elevator or a passenger-cargo dual-purpose elevator for daily use by operators, so as to save manpower, reduce labor intensity, and improve efficiency.

[0009] The present application is mainly used for large-scale equipment or high-rise buildings in flammable and explosive fire hazard places and toxic hazard places in petrochemical industry and other industries.

[0010] The present application will be further described in detail below in combination with the drawings and specific embodiments. The drawings and specific embodiments do not limit the scope of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a schematic diagram of the arrangement of the first embodiment of the explosion-proof elevator system of the present application.

[0012] Figure 2 is a top view of the main facilities and parts in the first embodiment of the explosion-proof elevator system of the present application.

[0013] Figure 3 is a top view of the main facilities and parts in the second embodiment of the explosion-proof elevator system of the present application.

[0014] Figure 4 is a top view of the main facilities and parts in the third embodiment of the explosion-proof elevator system of the present application.

[0015] Figure 5 is a schematic diagram of a power supply circuit of the explosion-proof elevator system of the present application.

[0016] Figure 6 is a schematic diagram of another power supply circuit of the explosion-proof elevator system of the present application.

[0017] Figures 1 to 6In the drawings, like reference numerals refer to like technical features. The reference numerals represent: 1 - elevator shaft; 2 - machine room; 3 - car hoisting system; 31 - car hoisting system pulley; 32 - car wire rope; 33 - car pulley; 4 - car traction motor power system; 41 - car motor; 42 - car speed reducer; 5 - car; 51 - escape window; 52 - escape door; 6 - hoist lifting system; 61 - hook motor; 62 - hook speed reducer; 63 - hook drum; 64 - hook wire rope; 65 - hook pulley; 66 - hook; 67 - control box; 68 - wire control cable; 69 - bracket on hook 66; 7 - elevator door; 8 - fire door; 9 - backup power battery pack; 91 - battery explosion-proof box; 10 - electrical control cabinet; 11 - antechamber; 12 - large equipment or high-rise building; 13 - evacuation corridor; 131 - compressed air input device; 132 - spraying device; 141 - first circuit breaker; 142 - second circuit breaker; 143 - total circuit breaker; 15 - three-phase alternating current power supply; 161 - first thermal protector; 162 - second thermal protector; 17 - transformer; 18 - inverter; 191 - first contactor; 192 - second contactor; 193 - third contactor; 20 - rectifier; 21 - operation platform; 22 - ground.

[0018] Figures 1 to 4 The large equipment or high-rise building 12 is also shown in Figure 5 and Figure 6 The car motor 41 and the hook motor 61 are also shown in DETAILED DESCRIPTION

[0019] Referring to Figures 1 to 6 The explosion-proof elevator system of the present application is provided with an explosion-proof elevator, which is provided with an elevator shaft 1, a car 5, a car traction motor power system 4, a car hoisting system 3, and a power supply circuit. The car traction motor power system 4 is provided with a car motor 41 and a car speed reducer 42, and the car hoisting system 3 is provided with a car hoisting system pulley 31, a car wire rope 32, and a car pulley 33. The power supply circuit includes a main power supply circuit and a car motor main power supply circuit, the input end of the main power supply circuit cable is connected with the three-phase alternating current power supply 15, the output end of the main power supply circuit cable is connected with the input end of the car motor main power supply circuit cable, and the output end of the car motor main power supply circuit cable is connected with the car motor 41. The three-phase alternating current power supply 15 is the main power supply of the explosion-proof elevator system, and the three-phase alternating current power supply 15 is powered by a primary load from a municipal or factory power grid.

[0020] The explosion-proof elevator system is also provided with a hook 66, a control box 67 and a hoist system 6, which controls the opening and closing and lifting of the hook 66 and the control box 67. The hoist system 6 is provided with a hook motor 61, a hook reducer 62, a hook drum 63, a hook wire rope 64 and a hook pulley 65. The hook 66 is fixed to the bottom end of the hook wire rope 64. The top of the elevator shaft 1 is provided with a machine room 2, and the car motor 41, the car reducer 42, the car lifting system pulley 31, the hook motor 61, the hook reducer 62, the hook drum 63 and the hook pulley 65 are all arranged in the machine room 2.

[0021] The car 5 is provided with an escape window 51 and / or an escape door 52. The escape window 51 is arranged on the top plate of the car 5, and the escape door 52 is arranged on one side wall of the car 5. Under normal working conditions, the hook 66 and the control box 67 are always located near the escape window 51 (as shown in FIG. 1) or near the escape door 52 (not shown); through the adjustment and control of the car traction machine power system 4, the car lifting system 3 and the hoist system 6, the above-mentioned purpose can be achieved. The escape door 52 leaves a space for personnel escape between the facing side wall of the elevator shaft 1. Figure 1

[0022] The power supply circuit also includes a main power supply circuit for the hook motor and a standby power supply circuit. The input end of the main power supply circuit cable for the hook motor is connected to the output end of the main power supply circuit cable, and the output end of the main power supply circuit cable for the hook motor is connected to the hook motor 61. The input end of the standby power supply circuit cable is connected to the standby power battery pack 9, and the output end of the standby power supply circuit cable is connected to the main power supply circuit cable for the car motor and the main power supply circuit cable for the hook motor respectively.

[0023] Figure 5 In the power supply circuit shown in FIG. 1, the car motor 41 and the hook motor 61 are three-phase asynchronous motors. The standby power battery pack 9 is a direct current battery pack, which is arranged in the battery explosion-proof box 91. The main power supply circuit cable for the car motor is provided with a first circuit breaker 141, a first contactor 191 and a first thermal protector 161 in sequence from the input end to the output end, and the main power supply circuit cable for the hook motor is provided with a second circuit breaker 142, a second contactor 192 and a second thermal protector 162 in sequence from the input end to the output end. The first output end of the standby power supply circuit cable is connected to the part of the main power supply circuit cable for the car motor between the first contactor 191 and the first thermal protector 161, and the second output end of the standby power supply circuit cable is connected to the part of the main power supply circuit cable for the hook motor between the second contactor 192 and the second thermal protector 162. The standby power supply circuit cable is provided with an inverter 18, a transformer 17 and a third contactor 193 in sequence from the input end to the first output end.

[0024] Figure 6 ​The power supply circuit shown, the car motor 41 and the hook motor 61 are DC motors. The standby power battery pack 9 is a DC battery pack, which is arranged in the battery explosion-proof box 91. The main power supply circuit cable is sequentially provided with the total circuit breaker 143, the transformer 17 and the rectifier 20 from the input end to the output end. The car motor main power supply circuit cable is sequentially provided with the first contactor 191 and the first thermal protector 161 from the input end to the output end. The hook motor main power supply circuit cable is sequentially provided with the second contactor 192 and the second thermal protector 162 from the input end to the output end. The first output end of the standby power supply circuit cable is connected with the part of the car motor main power supply circuit cable between the first contactor 191 and the first thermal protector 161. The second output end of the standby power supply circuit cable is connected with the part of the hook motor main power supply circuit cable between the second contactor 192 and the second thermal protector 162. The part of the standby power supply circuit cable between the input end and the first output end is provided with the third contactor 193.

[0025] The main power supply circuit includes the main power supply circuit cable, and the three-phase alternating current power supply 15 and various components connected with the main power supply circuit cable. When there is no component, the main power supply circuit only includes the main power supply circuit cable and the three-phase alternating current power supply 15 connected with the main power supply circuit cable. The car motor main power supply circuit includes the car motor main power supply circuit cable, and various components connected with the car motor main power supply circuit cable (excluding the car motor 41). The hook motor main power supply circuit includes the hook motor main power supply circuit cable, and various components connected with the hook motor main power supply circuit cable (excluding the hook motor 61). The standby power supply circuit includes the standby power supply circuit cable, and the standby power battery pack 9 and various components connected with the standby power supply circuit cable.

[0026] The standby power battery pack 9 used in the application is generally a lead-acid battery, a nickel-hydrogen battery or a lithium battery, or a storage device composed of the above-mentioned batteries and capacitors. The capacity of the standby power battery pack 9 needs to meet the power consumption of the car 4, the hook 66 and the operating box 67 for multiple up-and-down movements, or to make the car 4, the hook 66 and the operating box 67 continuously move up and down for 0.5-1.5 hours.

[0027] The first circuit breaker 141, the second circuit breaker 142, the total circuit breaker 143, the first thermal protector 161, the second thermal protector 162, the transformer 17, the inverter 18, the first contactor 191, the second contactor 192, the third contactor 193 and the rectifier 20 used in the application are all arranged in the electrical control cabinet 10.

[0028] The standby power battery pack 9, the battery explosion-proof box 91 and the electric control cabinet 10 can be arranged on the ground 22 (not shown). The main power supply circuit cables of the car motor and the main power supply circuit cables of the hook motor are led out from the electric control cabinet 10, and are arranged through the underground, the cable groove box, the cable pulley and the wire support. When the standby power battery pack 9, the battery explosion-proof box 91 and the electric control cabinet 10 are arranged on the ground 22, the standby power battery pack 9 and the battery explosion-proof box 91 can be arranged away from the flammable and explosive fire hazard place and the toxic hazard place (for example, arranged outside the storage tank fire dike), and then the buried cable is used to lead to the electric control cabinet 10.

[0029] The standby power battery pack 9, the battery explosion-proof box 91 and the electric control cabinet 10 can also be arranged in the machine room 2, as shown in Figures 1 to 4 The main power supply circuit cables of the car motor and the main power supply circuit cables of the hook motor led out from the electric control cabinet 10 can be connected to the car motor 41 and the hook motor 61 in proximity. The main power supply circuit cables from the three-phase alternating current power supply to the electric control cabinet 10 and various cables and the wire control cable 68 are arranged in a conventional manner, and the detailed description and the drawing are omitted.

[0030] Figure 1 The operating box 67 shown in the figure is provided with the wire control cable 68, one end of the wire control cable 68 is connected to the operating box 67, and the other end of the wire control cable 68 is connected to the control system of the hook motor 61 (not shown). The operating box 67 controls the start and stop and steering of the hook motor 61 through the wire control cable 68. The wire control cable 68 is connected to the support 69 on the hook 66, and the operating box 67 is fixed near the hook 66. The operating box 67 can also be a remote control type without the wire control cable 68, and can remotely control the start and stop and steering of the hook motor 61.

[0031] Referring to Figures 1 to 4 , the explosion-proof elevator system of the present application is provided with a front room 11 outside and side by side with the side wall of the elevator door 7 at each floor operating platform 21 and the elevator shaft 1 on the ground 22. One side of each front room 11 is adjacent to the elevator shaft 1 (shares a side wall provided with an elevator door 7), and the elevator shaft 1 and the front room 11 can be accessed through the elevator door 7. Each front room 11 is provided with a fireproof door 8 on one, two or three of the three side walls not shared with the elevator shaft 1.

[0032] Referring to Figures 1 to 4The ground 22 outside the fire door 8 of the first floor (i.e. the bottom floor) antechamber 11 is provided with an evacuation corridor 13, the entrance end of which communicates with the antechamber 11 through the fire door 8. The evacuation corridor 13 has two side walls, and the two side walls or one side wall of the evacuation corridor 13 is provided with a fire door 8. The exit end of the evacuation corridor 13 is also generally provided with a fire door 8. The length L of the evacuation corridor 13 is generally 30-50 meters. The evacuation corridor 13 is provided with a plurality of fire doors 8 uniformly distributed on one side wall thereof. The distance t between two adjacent fire doors 8 is generally 5-10 meters. The exit end of the evacuation corridor 13 should be far away from large equipment or high-rise buildings 12 in flammable and explosive fire hazard areas or toxic hazard areas.

[0033] The elevator shaft 1 has four side walls, one of which faces the large equipment or high-rise buildings 12. The elevator door 7 can be provided on any one side wall of the elevator shaft 1, and the antechamber 11 is provided outside the side wall of the elevator shaft 1 provided with the elevator door 7. Figure 1 and Figure 2 As shown in FIG. 1, one side wall of the elevator shaft 1 faces the large equipment or high-rise buildings 12. The side wall of the elevator shaft 1 opposite to the above-mentioned side wall is provided with the elevator door 7. The side wall of the antechamber 11 outside the side wall of the elevator shaft 1 provided with the elevator door 7. The side wall of the first floor antechamber 11 outside the side wall opposite to the side wall of the elevator shaft 1 provided with the elevator door 7 is provided with the evacuation corridor 13. Figure 3 As shown in FIG. 2, one side wall of the elevator shaft 1 faces the large equipment or high-rise buildings 12. The side wall of the elevator shaft 1 adjacent to the above-mentioned side wall is provided with the elevator door 7. The side wall of the antechamber 11 outside the side wall of the elevator shaft 1 provided with the elevator door 7. The side wall of the first floor antechamber 11 outside the side wall adjacent to the side wall of the elevator shaft 1 provided with the elevator door 7 and not facing the large equipment or high-rise buildings 12 is provided with the evacuation corridor 13. Figure 4 As shown in FIG. 3, one side wall of the elevator shaft 1 faces the large equipment or high-rise buildings 12. The side wall of the elevator shaft 1 adjacent to the above-mentioned side wall is provided with the elevator door 7. The side wall of the antechamber 11 outside the side wall of the elevator shaft 1 provided with the elevator door 7. The side wall of the first floor antechamber 11 outside the side wall opposite to the side wall of the elevator shaft 1 provided with the elevator door 7 is provided with the evacuation corridor 13.

[0034] The preferred scheme of the present application is that each antechamber 11 is provided with a fire door 8 on the side wall not facing the large equipment or high-rise buildings 12, and the evacuation corridor 13 is provided with a fire door 8 on the side wall not facing the large equipment or high-rise buildings 12 and at the exit end. The further preferred scheme is that the opening direction of the fire door 8 faces away from the large equipment or high-rise buildings 12 (such as the fire door 8 provided on the side wall of the antechamber 11 and the evacuation corridor 13 shown in FIG. 4). The purpose of using the above-mentioned preferred scheme is to protect the safety of the fire-fighting personnel and the operating personnel. Figure 4

[0035] ​Other preferred embodiments of the present application are that the machine room 2 is provided with compressed air input device 131 and spray device 132 for implementing positive pressure ventilation. The antechamber 11 is provided with fire extinguishers, protective clothing, breathing masks, gas masks, oxygen bottles, ladders and ropes and other fire-fighting equipment and tools for emergency use by fire personnel and evacuated operators. The antechamber 11 is also provided with compressed air input device 131 and spray device 132 for implementing positive pressure ventilation. The evacuation corridor 13 is provided with fire extinguishers, protective clothing, breathing masks, gas masks, oxygen bottles, ladders and ropes and other fire-fighting equipment and tools for emergency use by fire personnel and evacuated operators. The evacuation corridor 13 is also provided with compressed air input device 131 and spray device 132 for implementing positive pressure ventilation. The evacuation corridor 13 is provided with fire hydrants, fire foam tanks or low-pressure steam systems for convenient use by fire personnel nearby. Fire hydrants, fire foam tanks or low-pressure steam systems are provided near the antechamber 11 at each level of the operating platform 21 and the ground 22 for convenient use by fire personnel nearby. The present application only shows the compressed air input device 131 and the spray device 132 provided in the evacuation corridor 13. Figure 1 The present application only shows the compressed air input device 131 and the spray device 132 provided in the evacuation corridor 13.

[0036] The explosion-proof elevator described in the present application mainly includes an elevator shaft 1, a machine room 2, a car lifting system 3, a car traction machine power system 4, a car 5, an escape window 51, an escape door 52, a hoist lifting system 6, a lifting hook 66, a control box 67, an elevator door 7 and a power supply circuit. The explosion-proof elevator system of the present application mainly includes Figures 1 to 6 The equipment, building structure, circuit, etc. (except for large equipment or high-rise buildings 12) as shown.

[0037] The explosion-proof elevator system of the present application can be conventionally designed and implemented in various explosion-proof designs and methods. For example, explosion-proof electrical equipment and fire-retardant cable wiring are used in all strong current equipment and circuits; explosion-proof electrical equipment and fire-retardant cable wiring are used in all weak current equipment and circuits; the surfaces of mechanical parts with mutual friction are sprayed with spark-free materials or made entirely of spark-free materials, and are regularly lubricated; the battery explosion-proof box 91 and the electrical control cabinet 10 are of an explosion-proof type, for example, using an explosion-proof housing; the building structures of the elevator shaft 1, the antechamber 11 and the evacuation corridor 13 are of a one- or two-level fireproof structure.

[0038] The number of levels of the operating platform 21 is determined according to the operating needs of the large equipment or high-rise building 12.

[0039] The method for using the explosion-proof elevator system is that when the three-phase alternating current power supply 15 normally supplies power, the three-phase alternating current power supply 15 supplies power to the car motor 41 through the main power supply circuit and the car motor main power supply circuit, and also supplies power to the hook motor 61 through the main power supply circuit and the hook motor main power supply circuit. When the three-phase alternating current power supply 15 is powered off, the backup power battery pack 9 supplies power to the car motor 41 through the backup power supply circuit and the car motor main power supply circuit, and also supplies power to the hook motor 61 through the backup power supply circuit and the hook motor main power supply circuit. In the working condition of the explosion-proof elevator system described above and without failure (i.e. in the normal working condition), the hook 66 and the operating box 67 are synchronously opened and stopped and lifted with the car 5 in the elevator shaft 1, and the hook 66 and the operating box 67 are always located near the escape window 51 or the escape door 52 on the car 5; the hoist system 6 is synchronously operated with the car traction motor power system 4 and the car lifting system 3.

[0040] When the car 5 cannot move due to failure, the hoist system 6 is synchronously stopped, and the hook motor 61 is powered by the three-phase alternating current power supply 15 or the backup power battery pack 9, the personnel in the car 5 open the escape window 51 or the escape door 52 to escape, use a rope or a safety belt as a tool to hang on the hook 66, and manually use the operating box 67 to individually operate the opening and stopping and steering of the hook motor 61, so that the personnel, the hook 66 and the operating box 67 are lifted in the elevator shaft 1, realizing the safe escape of the personnel in the car 5 in the state that the car 5 cannot move due to failure. When the car 5 cannot move due to failure, the hook 66 and the operating box 67 are synchronously stopped. The personnel mentioned above refer to the fire-fighting personnel, or the fire-fighting personnel and the operating personnel.

[0041] Figure 5 The working process of the power supply circuit is that the car motor 41 and the hook motor 61 are three-phase asynchronous motors, and the backup power battery pack 9 is a direct current battery pack. When the three-phase alternating current power supply 15 normally supplies power, the first circuit breaker 141, the second circuit breaker 142, the first contactor 191, the second contactor 192, the first thermal protector 161 and the second thermal protector 162 are closed, and the third contactor 193 is opened. The alternating current output by the three-phase alternating current power supply 15 enters the car motor 41 through the main power supply circuit and the car motor main power supply circuit, and also enters the hook motor 61 through the main power supply circuit and the hook motor main power supply circuit.

[0042] When the three-phase alternating current power source 15 is powered off due to fire or other accidents, the first circuit breaker 141 and the second circuit breaker 142 are closed or opened, the first contactor 191 and the second contactor 192 are opened, and the first thermal protector 161, the second thermal protector 162 and the third contactor 193 are closed. The direct current output by the backup power battery 9 is converted into alternating current by the inverter 18, and then is converted by the transformer 17, enters the car motor 41 through the part of the backup power supply circuit and the car motor main power supply circuit between the first output end of the backup power supply circuit cable and the car motor 41, and enters the hook motor 61 through the part of the backup power supply circuit and the hook motor main power supply circuit between the second output end of the backup power supply circuit cable and the hook motor 61.

[0043] Figure 6 The working process of the shown power supply circuit is that the car motor 41 and the hook motor 61 are direct current motors, and the backup power battery 9 is a direct current battery. When the three-phase alternating current power source 15 is normally powered, the general circuit breaker 143, the first contactor 191, the second contactor 192, the first thermal protector 161 and the second thermal protector 162 are closed, and the third contactor 193 is opened. The alternating current output by the three-phase alternating current power source 15 is converted by the transformer 17, and then is converted into direct current by the rectifier 20, enters the car motor 41 through the main power supply circuit and the car motor main power supply circuit, and enters the hook motor 61 through the main power supply circuit and the hook motor main power supply circuit.

[0044] When the three-phase alternating current power source 15 is powered off due to fire or other accidents, the general circuit breaker 143 is closed or opened, the first contactor 191 and the second contactor 192 are opened, and the first thermal protector 161, the second thermal protector 162 and the third contactor 193 are closed. The direct current output by the backup power battery 9 enters the car motor 41 through the part of the backup power supply circuit and the car motor main power supply circuit between the first output end of the backup power supply circuit cable and the car motor 41, and enters the hook motor 61 through the part of the backup power supply circuit and the hook motor main power supply circuit between the second output end of the backup power supply circuit cable and the hook motor 61.

[0045] In addition, when the three-phase AC power supply 15 is normally powered, the first circuit breaker 141, the second circuit breaker 142, the total circuit breaker 143, the first contactor 191, the second contactor 192, the third contactor 193, the first thermal protector 161 and the second thermal protector 162 are all closed, and the main power supply circuit, the main power supply circuit of the car motor, the main power supply circuit of the hook motor and the standby power supply circuit are all connected. When the car motor 41 and the hook motor 61 are in the electric drive mode, they are mainly powered by the three-phase AC power supply 15. When the power of the three-phase AC power supply 15 is unstable or insufficient, the standby power battery pack 9 supplies power to supplement it, so as to stabilize the power supply and ensure the smooth operation of the explosion-proof elevator. When the car motor 41 is in the braking generation mode, the car motor 41 can charge the standby power battery pack 9, saving energy.

[0046] The opening and closing of the first circuit breaker 141, the second circuit breaker 142, the total circuit breaker 143, the first thermal protector 161, the second thermal protector 162, the first contactor 191, the second contactor 192 and the third contactor 193 can be manually or automatically switched. When automatically switched, the automatic control device commonly used in the art (such as a programmable controller) can be used to compile programs according to the description of the present application and adjust them to automatically perform the switching operations described above. In the working condition without failure, the hook 66 and the operating box 67 are synchronized with the car 5 to start and stop and ascend and descend in the elevator shaft 1, and the hoist system 6 is synchronized with the car traction motor power system 4 and the car ascending and descending system 3 to operate and stop; when the car 5 stops moving due to failure, the hoist system 6 stops synchronously, and personnel manually use the operating box 67 to individually operate the start and stop and steering of the hook motor 61; the above functions can be realized by the skilled in the art according to the requirements of the present application through conventional design, and the description of the present application is omitted.

[0047] The low-voltage alarm monitoring device can be used to monitor the power of the standby power battery pack 9. If the power of the standby power battery pack 9 is insufficient, the low-voltage alarm monitoring device will send an alarm signal to remind the operator and maintenance personnel to immediately overhaul or replace the standby power battery pack 9.

[0048] In the event of a fire (including a fire caused by an explosion) or a combustible and toxic gas leakage accident, the fire personnel can enter the car 5 through the fire door 8 of each floor lobby 11 and then through the ascending and descending operation of the car 5 or the hook 66 to perform fire rescue, investigation and other tasks. The personnel in the car 5 escape through the first floor lobby 11 and the evacuation corridor 13, which is conducive to evacuation to a safe area and improves the escape probability.

[0049] The explosion-proof elevator system of the present application can be linked with the fire detection and alarm system, the combustible gas detection and alarm system and the toxic gas detection and alarm system of the factory. When a fire or combustible and toxic gas leakage accident occurs, a linkage control signal is sent to the control system of the explosion-proof elevator system through the above-mentioned alarm systems, and the control system of the explosion-proof elevator system controls the car 5 to return to the first floor for use by the fire fighters. At the same time, the compressed air input device 131 is automatically started (the normally closed electromagnetic valve or control valve is opened) to input compressed air to the machine room 2, the antechamber 11, the evacuation corridor 13 and other key parts to implement positive pressure ventilation to further increase the safety of the fire fighting and rescue and prevent the development of the fire or the diffusion of the combustible and toxic gas. The compressed air can come from the compressed air pipe network of the public engineering system of the factory or from the compressed air tank arranged close to the explosion-proof elevator. When a fire occurs, the spray device 132 arranged at the machine room 2, the antechamber 11 and the evacuation corridor 13 and other parts can be automatically started (the normally closed electromagnetic valve or control valve is opened) to implement fire fighting spray to extinguish the fire. After the machine room 2, the antechamber 11 and the evacuation corridor 13 implement positive pressure ventilation, the internal pressure (gauge pressure) is generally 0.05-0.1 MPa.

[0050] The compressed air input device 131 and the spray device 132 can also be manually started.

Claims

1. An explosion-proof elevator system, provided with an explosion-proof elevator, the explosion-proof elevator being provided with an elevator shaft (1), a machine room (2), a car (5), a car hoisting machine power system (4), a car lifting system (3), a power supply circuit, the car hoisting machine power system (4) being provided with a car motor (41), the power supply circuit comprising a main power supply circuit and a car motor main power supply circuit, an input end of a main power supply circuit cable being connected with a three-phase alternating current power supply (15), an output end of the main power supply circuit cable being connected with an input end of a car motor main power supply circuit cable, an output end of the car motor main power supply circuit cable being connected with the car motor (41), characterized in that: The explosion-proof elevator system is also provided with a hook (66), a control box (67) and a hoist system (6), the hoist system (6) controls the start and stop and lifting of the hook (66) and the control box (67), the hoist system (6) is provided with a hook motor (61), the car (5) is provided with an escape window (51) and / or an escape door (52), under normal working conditions, the hook (66) and the control box (67) are always located near the escape window (51) or the escape door (52), the power supply circuit further comprises a main power supply circuit and a backup power supply circuit of the hook motor, the input end of the main power supply circuit cable of the hook motor is connected with the output end of the main power supply circuit cable, the output end of the main power supply circuit cable of the hook motor is connected with the hook motor (61), the input end of the backup power supply circuit cable is connected with the backup power battery pack (9), and the output end of the backup power supply circuit cable is connected with the main power supply circuit cable of the car motor and the main power supply circuit cable of the hook motor respectively; The car motor (41) and the hook motor (61) are three-phase asynchronous motors or direct current motors; When the car motor (41) and the hook motor (61) are three-phase asynchronous motors, the backup power battery pack (9) is a direct current battery pack, the main power supply circuit cable of the car motor is sequentially provided with a first circuit breaker (141), a first contactor (191) and a first thermal protector (161) from the input end to the output end, the main power supply circuit cable of the hook motor is sequentially provided with a second circuit breaker (142), a second contactor (192) and a second thermal protector (162) from the input end to the output end, the first output end of the backup power supply circuit cable is connected with the part of the main power supply circuit cable of the car motor between the first contactor (191) and the first thermal protector (161), the second output end of the backup power supply circuit cable is connected with the part of the main power supply circuit cable of the hook motor between the second contactor (192) and the second thermal protector (162), and the backup power supply circuit cable is sequentially provided with an inverter (18), a transformer (17) and a third contactor (193) from the input end to the first output end. When the car motor (41) and the hook motor (61) are DC motors, the backup power battery pack (9) is a DC battery pack, the main power supply circuit cable from the input end to the output end is provided with a total circuit breaker (143), a transformer (17) and a rectifier (20) in sequence, the car motor main power supply circuit cable from the input end to the output end is provided with a first contactor (191) and a first thermal protector (161) in sequence, the hook motor main power supply circuit cable from the input end to the output end is provided with a second contactor (192) and a second thermal protector (162) in sequence, the first output end of the backup power supply circuit cable is connected with the part of the car motor main power supply circuit cable between the first contactor (191) and the first thermal protector (161), the second output end of the backup power supply circuit cable is connected with the part of the hook motor main power supply circuit cable between the second contactor (192) and the second thermal protector (162), and the part of the backup power supply circuit cable between the input end and the first output end is provided with a third contactor (193).

2. An explosion-proof elevator system according to claim 1, characterized in that The operating box (67) is provided with a drive-by-wire cable (68), one end of the drive-by-wire cable (68) is connected with the operating box (67), the other end of the drive-by-wire cable (68) is connected with the control system of the hook motor (61), the operating box (67) drives the start and stop and steering of the hook motor (61) through the drive-by-wire cable (68), or the operating box (67) remotely drives the start and stop and steering of the hook motor (61).

3. The explosion-proof elevator system of claim 2, wherein: Each front room (11) is provided with a fire door (8) on the side wall not shared with the elevator shaft (1).

4. The explosion-proof elevator system of claim 3, wherein: The ground (22) outside one fire door (8) of the first floor front room (11) is provided with an evacuation corridor (13), the entrance end of the evacuation corridor (13) communicates with the front room (11) through the fire door (8), and the evacuation corridor (13) is provided with fire doors (8) on two side walls or one side wall.

5. The explosion-proof elevator system of claim 4, wherein: The evacuation corridor (13) adopts a fireproof structure, the length L is 30-50 meters, and the distance t between two adjacent fire doors (8) on one side wall of the evacuation corridor (13) is 5-10 meters.

6. The explosion-proof elevator system of claim 4, wherein: Each front room (11) is provided with a fire door (8) on the side wall not facing the large equipment or high-rise building (12), and the evacuation corridor (13) is provided with fire doors (8) on the side wall not facing the large equipment or high-rise building (12) and at the exit end.

7. The explosion-proof elevator system of claim 6, wherein: The opening direction of the fire door (8) faces away from the large equipment or high-rise building (12).

8. The explosion-proof elevator system according to claim 3 or 4, characterized in that: One side wall of the elevator shaft (1) faces the large equipment or high-rise building (12), the elevator door (7) is opened on the side wall of the elevator shaft (1) opposite to the side wall, the antechamber (11) is arranged outside the side wall where the elevator door (7) is opened, the evacuation corridor (13) is arranged outside the side wall opposite to the elevator door (7) in the antechamber (11) of the first floor, or one side wall of the elevator shaft (1) faces the large equipment or high-rise building (12), the elevator door (7) is opened on the side wall of the elevator shaft (1) adjacent to the side wall, the antechamber (11) is arranged outside the side wall where the elevator door (7) is opened, the evacuation corridor (13) is arranged outside the side wall adjacent to the side wall where the elevator door (7) is opened and not towards the large equipment or high-rise building in the antechamber (11) of the first floor, or one side wall of the elevator shaft (1) faces the large equipment or high-rise building (12), the elevator door (7) is opened on the side wall of the elevator shaft (1) adjacent to the side wall, the antechamber (11) is arranged outside the side wall where the elevator door (7) is opened, the evacuation corridor (13) is arranged outside the side wall opposite to the elevator door (7) in the antechamber of the first floor.

9. The explosion-proof elevator system according to claim 3 or 4, characterized in that: The machine room (2) is provided with compressed air input device (131) and spray device (132), the antechamber (11) is provided with fire extinguisher, protective clothing, breathing mask, gas mask, oxygen cylinder, ladder, rope, compressed air input device (131) and spray device (132), the evacuation corridor (13) is provided with fire extinguisher, protective clothing, breathing mask, gas mask, oxygen cylinder, ladder, rope, compressed air input device (131) and spray device (132), the evacuation corridor (13) is provided with fire hydrant, fire foam tank or low pressure steam system, the fire hydrant, fire foam tank or low pressure steam system is arranged near the antechamber (11) at each layer operation platform (21) and ground (22), the compressed air input device (131) is used for implementing positive pressure ventilation.

10. A method of using the explosion-proof elevator system of claim 1, characterized by: When the three-phase alternating current power supply (15) normally supplies power, the three-phase alternating current power supply (15) supplies power to the car motor (41) through the main power supply loop and the car motor main power supply loop, and also supplies power to the hook motor (61) through the main power supply loop and the hook motor main power supply loop; when the three-phase alternating current power supply (15) is powered off, the standby power battery pack (9) supplies power to the car motor (41) through the standby power supply loop and the car motor main power supply loop, and also supplies power to the hook motor (61) through the standby power supply loop and the hook motor main power supply loop; under normal working conditions, the hook (66) and the operating box (67) are synchronous with the car (5) in starting and stopping and lifting, and the hook (66) and the operating box (67) are always located near the escape window (51) or the escape door (52) on the car (5); The car motor (41) and the hook motor (61) are three-phase asynchronous motors or direct current motors. When the car motor (41) and the hook motor (61) are three-phase asynchronous motors, the standby power battery group (9) is a direct current battery group, the first circuit breaker (141), the second circuit breaker (142), the first contactor (191), the second contactor (192), the first thermal protector (161) and the second thermal protector (162) are closed, the third contactor (193) is opened, the alternating current output by the three-phase alternating current power supply (15) enters the car motor (41) through the main power supply circuit and the car motor main power supply circuit, and also enters the hook motor (61) through the main power supply circuit and the hook motor main power supply circuit, when the three-phase alternating current power supply (15) is powered off, the first circuit breaker (141) and the second circuit breaker (142) are closed or opened, the first contactor (191) and the second contactor (192) are opened, the first thermal protector (161), the second thermal protector (162) and the third contactor (193) are closed, the direct current output by the standby power battery group (9) is converted into alternating current by the inverter (18), and then is converted by the transformer (17), enters the car motor (41) through the standby power supply circuit and the part of the car motor main power supply circuit between the first output end of the standby power supply circuit cable and the car motor (41), and also enters the hook motor (61) through the standby power supply circuit and the part of the hook motor main power supply circuit between the second output end of the standby power supply circuit cable and the hook motor (61); When the car motor (41) and the hook motor (61) are direct current motors, the standby power battery group (9) is a direct current battery group, the total circuit breaker (143), the first contactor (191), the second contactor (192), the first thermal protector (161) and the second thermal protector (162) are closed, the third contactor (193) is opened, the alternating current output by the three-phase alternating current power supply (15) is converted into direct current by the transformer (17) and the rectifier (20), enters the car motor (41) through the main power supply circuit and the car motor main power supply circuit, and also enters the hook motor (61) through the main power supply circuit and the hook motor main power supply circuit, when the three-phase alternating current power supply (15) is powered off, the total circuit breaker (143) is closed or opened, the first contactor (191) and the second contactor (192) are opened, the first thermal protector (161), the second thermal protector (162) and the third contactor (193) are closed, the direct current output by the standby power battery group (9) enters the car motor (41) through the standby power supply circuit and the part of the car motor main power supply circuit between the first output end of the standby power supply circuit cable and the car motor (41), and also enters the hook motor (61) through the standby power supply circuit and the part of the hook motor main power supply circuit between the second output end of the standby power supply circuit cable and the hook motor (61).

11. The method of claim 10, wherein: When the car (5) cannot move due to failure, the hook motor (61) is powered by the three-phase AC power supply (15) or the backup power battery pack (9), the personnel in the car (5) open the escape window (51) or the escape door (52) to escape, hang on the hook (66), and use the operating box (67) to individually operate the start and stop and steering of the hook motor (61), so that the personnel, the hook (66) and the operating box (67) are lifted in the elevator shaft (1).

12. The method of claim 10, wherein: When the three-phase AC power supply (15) normally supplies power, the first circuit breaker (141), the second circuit breaker (142), the total circuit breaker (143), the first contactor (191), the second contactor (192), the third contactor (193), the first thermal protector (161) and the second thermal protector (162) are all closed, the main power supply circuit, the car motor main power supply circuit, the hook motor main power supply circuit and the backup power supply circuit are all connected, when the car motor (41) and the hook motor (61) are in the electric drive working condition, they are mainly powered by the three-phase AC power supply (15), when the power of the three-phase AC power supply (15) is unstable or insufficient, the backup power battery pack (9) is used to supplement the power, when the car motor (41) is in the braking generation working condition, the car motor (41) charges the backup power battery pack (9).

13. The method of claim 10 or 11, wherein the fire or flammable and toxic gas leak accident occurs. The firefighters enter the front room (11) of each floor through the fireproof door (8) of the front room (11) of each floor, and then enter the car (5), and perform tasks through the lifting operation of the car (5) or the hook (66).

14. The method of claim 10 or 11, wherein: The explosion-proof elevator system is linked with the fire detection and alarm system, the combustible gas detection and alarm system and the toxic gas detection and alarm system of the factory, when a fire or a combustible and toxic gas leakage accident occurs, the linkage control signal is sent to the control system of the explosion-proof elevator system through the above-mentioned alarm system, and the control system of the explosion-proof elevator system controls the car (5) to return to the first floor for the firefighters to use.

15. The method of claim 10, wherein: The capacity of the backup power battery pack (9) can make the car (5), the hook (66) and the operating box (67) continuously lift and move for 0.5-1.5 hours.

16. The method of claim 10, wherein: After the machine room (2), the front room (11) and the evacuation corridor (13) are subjected to positive pressure ventilation, the internal pressure is 0.05-0.1 MPa. After the machine room (2), the front room (11) and the evacuation corridor (13) are subjected to positive pressure ventilation, the internal pressure is 0.05-0.1 MPa.

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