Twin-elevator system and installation method thereof

Abstract

The invention relates to a double-elevator system and an installation method thereof. The double-elevator system comprises two lift cars, the two lift cars are arranged in the same hoistway in the vertical direction and can ascend and descend separately in the vertical direction, a first lift car lifting system is arranged for the first lift car, and a second lift car lifting system is arranged for the second lift car. And after the first lift car lifting system is installed, the second lift car lifting system is installed. Namely, the double-elevator system can be installed and used in two steps, in the first stage, the first lift car lifting system is installed and can be put into use, and then the double-elevator system operates in the form of a half double-elevator. And in the second stage, a second lift car lifting system is installed, and therefore a complete double-elevator system is formed. Therefore, the earlier-stage capital pressure in the building process can be relieved, energy consumption can be saved at the initial stage of building use, and installation and use progress can be flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and particularly to a twin elevator system and an installation method thereof. Background Art

[0002] A twin elevator refers to an elevator system in which two carriages are installed in the same hoistway. The two carriages can run independently up and down in the hoistway, making it possible for two passengers to reach different floors simultaneously. Therefore, twin elevators can effectively improve the transportation efficiency of elevators.

[0003] However, since two carriages require an additional set of main components such as a counterweight and a driving device, as well as other related safety components, there is a great financial pressure in the early stage of the construction process, and the energy consumption is large in the initial stage of the building's operation. Therefore, it is particularly important to provide a twin elevator that allows either of the two carriages to run independently first.

[0004] The above statement of the background art is only for facilitating the in-depth understanding of the technical solution of the present invention (in terms of technical means used, technical problems solved, and technical effects produced, etc.), and should not be regarded as an admission or an indication in any form that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0005] The object of the present invention is to provide a twin elevator system and an installation method thereof, so that either of the two carriages can run independently first.

[0006] According to an embodiment of the present invention, a twin elevator system is provided, which includes two carriages. The two carriages are arranged vertically in the same hoistway and can rise and fall separately from each other in the vertical direction. A first carriage lifting system is provided for the first carriage, and a second carriage lifting system is provided for the second carriage. After the first carriage and the first carriage lifting system are installed, the second carriage and the second carriage lifting system are installed.

[0007] Each of the first carriage lifting system and the second carriage lifting system may include: a driving device, which at least includes a traction machine; a suspension device, which includes a suspension rope or a suspension belt and at least one guide wheel around which the suspension rope or the suspension belt passes; a counterweight, which is connected to the carriage through the suspension device, and the traction machine pulls the counterweight and the carriage through the suspension device.

[0008] In each of the first carriage lifting system and the second carriage lifting system, the counterweight and the carriage may be connected to the suspension rope or the suspension belt through a rope socket or a wheel set.

[0009] Each of the first car lifting system and the second car lifting system may further include: a compensating device, which includes a compensating rope or chain connecting the counterweight and the car and at least one compensating pulley around which the compensating rope or chain passes, or includes compensating weights provided at the bottom of the car.

[0010] A preparation space for installing the second car and the second car lifting system may be reserved, and after the installation of the first car and the first car lifting system is completed, the second car and the second car lifting system are installed.

[0011] After the installation of the first car lifting system and the second car lifting system is completed, a safety protection system for preventing the first car from colliding with the second car may be installed.

[0012] According to another embodiment of the present invention, there is provided an installation method of a twin elevator system, the twin elevator system including two cars, the two cars being arranged in the same hoistway in the vertical direction and capable of ascending and descending separately from each other in the vertical direction, and a first car lifting system being provided for the first car and a second car lifting system being provided for the second car; the method includes: installing the first car and the first car lifting system; after the installation of the first car and the first car lifting system is completed, installing the second car and the second car lifting system.

[0013] The installation method of the twin elevator system may further include: reserving a preparation space for installing the second car and the second car lifting system, and after the installation of the first car and the first car lifting system is completed, installing the second car and the second car lifting system.

[0014] The installation method of the twin elevator system may further include: after the installation of the first car lifting system and the second car lifting system is completed, installing a safety protection system for preventing the first car from colliding with the second car.

[0015] The installation steps of each of the first car lifting system and the second car lifting system include: a suspension device connecting the counterweight and the car and a traction machine in the driving device traction the counterweight and the car through the suspension device, the suspension device including a suspension rope or belt and a plurality of guide pulleys around which the suspension rope or belt passes; a compensating device connecting the counterweight and the car or provided at the bottom of the car, in the case where the compensating device connects the counterweight and the car, the compensating device includes a compensating rope or chain and a plurality of compensating pulleys around which the compensating rope or chain passes, and in the case where the compensating device is provided at the bottom of the car, the compensating device includes compensating weights.

[0016] The present invention adopts the above technical solutions and has the following beneficial effects: The twin elevator system can be installed and used in two steps. In the first stage, the first car lifting system is installed and can be put into use, and the twin elevator system operates in the form of "half a twin elevator". In the second stage, the second car lifting system is installed, thus forming a complete twin elevator system. Specifically, the second stage can be when the passenger flow in the building increases and the elevator needs to meet a larger traffic flow, or when the customer's budget can already meet the configuration of the double car. Therefore, the present invention can relieve the early capital pressure during the building construction process, can save energy consumption in the initial stage of the building's operation, and can flexibly install and use the progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The exemplary embodiments of the present invention will be described in more detail below with reference to the drawings. For clarity, the same components in different drawings are denoted by the same reference numerals. It should be noted that the drawings are only schematic and are not necessarily drawn to scale. In these drawings:

[0018] Figure 1 FIG. shows a schematic structural diagram of a single elevator in a twin elevator system according to an exemplary embodiment of the present invention.

[0019] Figure 2 FIG. shows a schematic structural diagram of two elevators in a twin elevator system according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The embodiments of the present invention will be described in detail below. The following embodiments are implemented on the premise of the technical solutions of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0021] According to an embodiment of the present invention, the twin elevator system includes two cars, the two cars are arranged in the same hoistway in the vertical direction and can rise and fall separately from each other in the vertical direction, and a first car lifting system is provided for the first car, and a second car lifting system is provided for the second car.

[0022] According to an embodiment of the present invention, after the installation of the first car and the first car lifting system is completed, the second car and the second car lifting system are installed. That is, the twin elevator system can be installed and used in two steps. In the first stage, the first car lifting system is installed and can be put into use, and the twin elevator system operates in the form of "half twin elevator". In the second stage, the second car lifting system is installed, thus forming a complete twin elevator system. Specifically, the second stage can be the stage when the passenger flow in the building increases and the elevator needs to meet a greater traffic flow, or when the customer's budget can already meet the double car configuration. Thereby, the early capital pressure during the building construction process can be alleviated, energy consumption can be saved in the initial stage of the building's operation, and the installation and usage progress can be flexible.

[0023] Preferably, a preparation space for installing the second car and the second car lifting system is reserved, and after the installation of the first car and the first car lifting system is completed, the second car and the second car lifting system are installed. Specifically, the preparation space includes the preparation spaces for the machine room, the hoistway, and the pit (i.e., the space above the pit floor). These are all based on the civil engineering layout of the project. At the beginning, the civil engineering drawings will be completed, and the layout of two elevators is included in the civil engineering drawings. Therefore, sufficient space is specified at the beginning. If the civil engineering layout arranges the machine rooms of two elevators on the same floor, then sufficient space dimensions are reserved on the same floor. If the civil engineering layout arranges the machine rooms of two elevators not on the same floor and additional auxiliary machine rooms are required, then the machine room space on another floor needs to be reserved. Similarly, the civil engineering layout will reserve sufficient dimensions for the hoistway, and some space for control systems can be included in the hoistway. If the civil engineering layout arranges the pit floors of two elevators on the same floor, then the civil engineering layout will reserve sufficient dimensions for the pit.

[0024] Preferably, after the installation of the first car lifting system and the second car lifting system is completed, a safety protection system for preventing the first car from colliding with the second car is installed. The safety protection system is installed in the machine room, and before the project starts, the civil engineering layout will provide sufficient machine room dimensions to accommodate the safety protection system. The safety protection system can receive signals from speed and displacement sensors installed on the first car and the second car. After the safety protection system receives the position and speed information of the first car and the second car, it can calculate the real-time distance and speed between the first car and the second car. When the real-time distance is approaching the safety distance, or when the real-time speed is too fast and the elevator may accelerate to reach the safety distance, the safety protection system will activate the brake of the traction machine to brake the first car and the second car. If the first car and the second car still cannot decelerate, the safety protection system will trigger the safety gear to act.

[0025] Specifically, each of the first car lifting system and the second car lifting system may include a driving device, a suspension device, and a counterweight. The driving device at least includes a traction machine. The suspension device includes suspension ropes and at least one guide wheel around which the suspension ropes pass. The counterweight is connected to the car through the suspension device, and the traction machine pulls the counterweight and the car through the suspension device. Thus, the lifting of the first car and the second car can be achieved.

[0026] Preferably, each of the first car lifting system and the second car lifting system may further include a compensation device. The compensation device may include a compensation rope connecting the counterweight and the car and at least one compensation wheel around which the compensation rope passes. In other embodiments, the compensation device may include compensation weights provided at the bottom of the car. The function of the compensation device is to compensate for the weight difference between the car and the counterweight, making the weights on both sides of the traction machine more balanced and beneficial to the stable operation of the car.

[0027] Hereinafter, a twin elevator system according to an exemplary embodiment of the present invention will be described in detail. Figure 1 A schematic structural diagram of a single elevator in a twin elevator system according to an exemplary embodiment of the present invention is shown.

[0028] As Figure 1 shown, the first car lifting system provided for the first car 110 may include: a first counterweight 120, a first traction machine 130, a first counterweight side wheel set, a first car side wheel set, a first guide wheel assembly, a first compensation wheel assembly, a first suspension rope 150, and a first compensation rope 160.

[0029] The first traction machine 130 is provided in the machine room 400. The machine room 400 is provided at the top of the hoistway 300 and is separated from the hoistway 300 by a partition wall 310. The partition wall 310 forms the floor of the machine room 400 and forms the top surface of the hoistway 300. In addition, the partition wall 310 is provided with a plurality of rope holes for the suspension ropes to pass through.

[0030] According to an embodiment of the present invention, in addition to including the first traction machine 130, the driving device of the first car lifting system may further include a frame for setting the first traction machine 130, and the driving device is provided in the machine room 400. According to the above exemplary embodiment, the machine room 400 is provided at the top of the hoistway 300, but the present invention is not limited thereto, and the machine room 400 may also be provided at the bottom or outside of the hoistway 300.

[0031] The first counterweight side wheel set may include a first counterweight top wheel 141, and the first counterweight top wheel 141 is connected to the top of the first counterweight 120.

[0032] The first car top wheel set 142 may include a right first car top wheel 147, a middle first car top wheel 146, and a left first car top wheel 148. The right first car top wheel 147, the middle first car top wheel 146, and the left first car top wheel 148 are connected to the top of the first car 110.

[0033] The first guide wheel assembly includes a first machine room guide wheel 143, and the first machine room guide wheel 143 is disposed in the machine room 400.

[0034] Both ends of the first suspension rope 150 are respectively connected to the partition wall 310, and one end of the first suspension rope 150 sequentially winds around a first car top wheel (specifically, the middle first car top wheel 146) in the first car top wheel set 142, the first traction machine 130, the first machine room guide wheel 143, and the first counterweight top wheel 141 until the other end of the first suspension rope 150.

[0035] According to the above exemplary embodiments, the counterweight (i.e., the first counterweight 120) is connected to the suspension rope (i.e., the first suspension rope 150) through a wheel set (i.e., the first counterweight top wheel 141), and the car (i.e., the first car 110) is connected to the suspension rope (i.e., the first suspension rope 150) through a wheel set (i.e., the middle first car top wheel 146). However, the present invention is not limited thereto, and the first counterweight 120 and the first car 110 may also be connected to the first suspension rope 150 through rope sockets.

[0036] The first compensating wheel assembly includes a first hoistway compensating wheel 144 and a first hoistway pit wheel set 145. The first hoistway compensating wheel 144 is disposed in the hoistway 300. The first hoistway pit wheel set 145 is connected to the pit floor 320 of the hoistway 300. Specifically, the first hoistway pit wheel set 145 includes a left first hoistway pit wheel 140 and a right first hoistway pit wheel 149.

[0037] Both ends of the first compensating rope 160 are connected to the first counterweight 120, and one end of the first compensating rope 160 sequentially winds around the first hoistway pit wheel set 145 (specifically, the left first hoistway pit wheel 140 and the right first hoistway pit wheel 149), other first car top wheels in the first car top wheel set 142 (specifically, the right first car top wheel 147 and the left first car top wheel 148), and the first hoistway compensating wheel 144 until the other end of the first compensating rope 160.

[0038] According to the above exemplary embodiments, the compensation device is a loop composed of a first compensation rope 160 and compensation wheels (i.e., a left first hoistway pit wheel 140, a right first hoistway pit wheel 149, a right first car top wheel 147, a left first car top wheel 148, and a first hoistway compensation wheel 144), and both ends of the first compensation rope 160 are connected to the counterweight 120. However, the present invention is not limited thereto. When the compensation device is a loop composed of a compensation rope and compensation wheels, both ends of the first compensation rope 160 can be connected to the first car 110, or one end of the first compensation rope 160 can be connected to the first counterweight 120 and the other end can be connected to the first car 110. In other embodiments, the compensation device can be a compensation weight block provided at the bottom of the first car 110.

[0039] In the first stage, the first car 110 and the first car lifting system can operate independently for passengers to board.

[0040] As Figure 2 shown, the second car lifting system provided for the second car 210 may include a second counterweight 220, a second traction machine 230, a second counterweight side wheel set, a second car side wheel set, a second guide wheel assembly, a second compensation wheel assembly, a second suspension rope 250, and a second compensation rope 260.

[0041] The second traction machine 230 is provided in the machine room 400. The second traction machine 230 and the first traction machine 130 may be located in the same machine room 400 or in different machine rooms 400.

[0042] Similarly, in addition to including the second traction machine 230, the driving device of the second car lifting system may further include a frame for setting the second traction machine 230.

[0043] The second counterweight side wheel set includes a second counterweight top wheel 241, and the second counterweight top wheel 241 is connected to the top of the second counterweight 220.

[0044] The second car top wheel set 242 includes a right second car top wheel 247 and a left second car top wheel 248. The right second car top wheel 247 and the left second car top wheel 248 are connected to the top of the second car 210.

[0045] The second guide wheel assembly includes a second machine room guide wheel 243, and the second machine room guide wheel 243 is provided in the machine room 400.

[0046] Both ends of the second suspension rope 250 are respectively connected to the partition wall 310, and one end of the second suspension rope 250 sequentially passes around the second car top wheel set 242 (specifically, the right second car top wheel 247 and the left second car top wheel 248), the second traction machine 230, the second machine room guide wheel 243, and the first counterweight top wheel 241 until the other end of the second suspension rope 250.

[0047] According to the above exemplary embodiments, the counterweight (i.e., the second counterweight 220) is connected to the suspension rope (i.e., the second suspension rope 250) through a sheave set (i.e., the second counterweight top sheave set 241), and the car (i.e., the second car 210) is connected to the suspension rope (i.e., the second suspension rope 250) through a sheave set (i.e., the right second car top sheave 247 and the left second car top sheave 248). However, the present invention is not limited thereto, and the second counterweight 220 and the second car 210 may also be connected to the second suspension rope 250 through rope sockets.

[0048] The second compensating sheave assembly includes a second hoistway pit sheave set 245, and the second hoistway pit sheave set 245 is connected to the bottom pit surface 320 of the hoistway 300. Specifically, the second hoistway pit sheave set 245 includes a left first hoistway pit sheave 240 and a right first hoistway pit sheave 249.

[0049] Both ends of the second compensating rope 260 are respectively connected to the second car 210 and the second counterweight 220, and one end of the second compensating rope 260 connected to the second car 210 sequentially winds around the second hoistway pit sheave set 245 (specifically, the left first hoistway pit sheave 240 and the right first hoistway pit sheave 249) until the other end of the second compensating rope 260 connected to the second counterweight 220.

[0050] According to the above exemplary embodiments, the compensating device is a loop composed of the second compensating rope 260 and compensating sheaves (i.e., the left first hoistway pit sheave 240 and the right first hoistway pit sheave 249), and one end of the second compensating rope 260 is connected to the second counterweight 220, and the other end is connected to the second car 210. However, the present invention is not limited thereto. When the compensating device is a loop composed of a compensating rope and compensating sheaves, both ends of the second compensating rope 260 may be connected to the second counterweight 220, or both ends may be connected to the second car 210. In other embodiments, the compensating device may be a compensating weight block provided at the bottom of the second car 210.

[0051] In the second stage, the first car 110 and the first car lifting system and the second car 210 and the second car lifting system can operate together for passengers to ride.

[0052] According to the embodiments of the present invention, the suspension ropes (specifically, the first suspension rope 150 and the second suspension rope 250) may be replaced by suspension belts. For example, the suspension rope may be a steel wire rope, and the suspension belt may be a steel belt. The compensating ropes (specifically, the first compensating rope 160 and the second compensating rope 260) may be replaced by compensating chains.

[0053] Embodiments of the present invention also provide a method for installing a twin elevator system. The twin elevator system includes two carriages, the two carriages are arranged vertically in the same hoistway and can move up and down separately from each other in the vertical direction, and a first carriage lifting system is provided for the first carriage, and a second carriage lifting system is provided for the second carriage.

[0054] The method for installing the twin elevator system includes: installing the first carriage and the first carriage lifting system; after the installation of the first carriage and the first carriage lifting system is completed, installing the second carriage and the second carriage lifting system.

[0055] The method for installing the twin elevator system further includes: reserving a preparation space for installing the second carriage and the second carriage lifting system, and after the installation of the first carriage and the first carriage lifting system is completed, installing the second carriage and the second carriage lifting system.

[0056] The method for installing the twin elevator system further includes: after the installation of the first carriage lifting system and the second carriage lifting system is completed, installing a safety protection system for preventing the first carriage from colliding with the second carriage.

[0057] The installation steps of each of the first carriage lifting system and the second carriage lifting system include: the suspension device connects the counterweight and the carriage and the traction machine included in the driving device pulls the counterweight and the carriage through the suspension device. Specifically, the suspension device includes suspension ropes and a plurality of guide wheels around which the suspension ropes pass. The compensation device connects the counterweight and the carriage or is arranged at the bottom of the carriage. Specifically, in the case where the compensation device connects the counterweight and the carriage, the compensation device includes a compensation rope or a compensation chain and a plurality of compensation wheels around which the compensation rope or the compensation chain pass, and in the case where the compensation device is arranged at the bottom of the carriage, the compensation device includes a compensation weight block.

[0058] Combined with Figure 1 and Figure 2For the twin elevator system shown, the steps of installing the first car hoisting system may include: The first traction machine 130 is disposed in the machine room 400. The first counterweight top wheel 141 is connected to the top of the first counterweight 120. The first car top wheel set 142 is connected to the top of the first car 110. The first machine room guide wheel 143 is disposed in the machine room 400. The first hoistway compensating wheel 144 is disposed in the hoistway 300. The first hoistway pit wheel set 145 is connected to the pit surface 320 of the hoistway 300. Both ends of the first suspension rope 150 are respectively connected to the partition wall 310, and one end of the first suspension rope 150 sequentially passes around one of the first car top wheels in the first car top wheel set 142 (specifically, the middle first car top wheel 146), the first traction machine 130, the first machine room guide wheel 143, and the first counterweight top wheel 141 until the other end of the first suspension rope 150. Both ends of the first compensating rope 160 are connected to the first counterweight 120, and one end of the first compensating rope 160 sequentially passes around the first hoistway pit wheel set 145 (specifically, the left first hoistway pit wheel 140 and the right first hoistway pit wheel 149), the other first car top wheels in the first car top wheel set 142 (specifically, the right first car top wheel 147 and the left first car top wheel 148), and the first hoistway compensating wheel 144 until the other end of the first compensating rope 160.

[0059] The installation process of the above-mentioned first car hoisting system can be implemented simultaneously or in a different order.

[0060] In addition, the steps of installing the second car hoisting system may include: The second traction machine 230 is disposed in the machine room 400. The second counterweight top wheel 241 is connected to the top of the second counterweight 220. The second car top wheel set 242 is connected to the top of the second car 210. The second machine room guide wheel 243 is disposed in the machine room 400. The second hoistway pit wheel set 245 is connected to the pit surface 320 of the hoistway 300. Both ends of the second suspension rope 250 are respectively connected to the partition wall 310, and one end of the second suspension rope 250 sequentially passes around the second car top wheel set 242 (specifically, the right second car top wheel 247 and the left second car top wheel 248), the second traction machine 230, the second machine room guide wheel 243, and the first counterweight top wheel 241 until the other end of the second suspension rope 250. Both ends of the second compensating rope 260 are respectively connected to the second car 210 and the second counterweight 220, and the end of the second compensating rope 260 connecting the second car 210 sequentially passes around the second hoistway pit wheel set 245 (specifically, the left first hoistway pit wheel 240 and the right first hoistway pit wheel 249) until the other end of the second compensating rope 260 connecting the second counterweight 220.

[0061] The installation process of the above-mentioned second car hoisting system can be implemented simultaneously or in a different order.

[0062] According to an embodiment of the present invention, during the installation of a twin elevator, the installation work can be completed in two stages. In the first stage, a liftable car and its related components are installed first, including guide rails, counterweights, suspension ropes, control cabinets (i.e., machine rooms), etc. And, all the preparation spaces for subsequent installation of another lifting system are reserved. After installation, the twin elevator system operates in the form of "half a twin elevator". In the second stage, when the passenger flow in the building increases and it is necessary to meet a larger traffic flow, or the customer's budget can already meet the double-car configuration, another liftable car and its related components, as well as a safety protection system to prevent the two cars from colliding, can be installed. Thus, the installation of the entire twin elevator can be completed. The elevator can operate in the form of a twin elevator.

[0063] The twin elevator system and its installation method according to an embodiment of the present invention can relieve the early capital pressure during the construction of a completed building, can save energy consumption in the initial stage of building operation, and can be flexible in the installation and usage progress.

[0064] The various embodiments of the present invention are not an exhaustive list of all possible combinations, but are intended to describe representative aspects of the present invention, and the content described in the various embodiments can be applied independently or in combinations of two or more.

[0065] The description presented in the above exemplary embodiments is only used to illustrate the technical solutions of the present invention and is not intended to be exhaustive, nor is it intended to limit the present invention to the precise form described. Obviously, many changes and variations are possible for those of ordinary skill in the art according to the above teachings. The selection of the exemplary embodiments and the description are for explaining the specific principles of the present invention and its practical applications, so that other technicians in the art can understand, implement and utilize the various exemplary embodiments of the present invention and their various alternative forms and modified forms. The scope of protection of the present invention is intended to be defined by the appended claims and their equivalents.

Claims

1. A twin elevator system, which includes two carriages. The two carriages are arranged vertically in the same hoistway and can rise and fall separately from each other in the vertical direction. A first carriage lifting system is provided for the first carriage, and a second carriage lifting system is provided for the second carriage; Among them, After the installation of the first carriage and the first carriage lifting system is completed, install the second carriage and the second carriage lifting system.

2. The twin elevator system according to claim 1, wherein, Each of the first carriage lifting system and the second carriage lifting system includes: A driving device, which at least includes a traction machine; Suspension equipment, which includes a suspension rope or a suspension belt and at least one guide wheel around which the suspension rope or the suspension belt passes; A counterweight, which is connected to the carriage through the suspension equipment, and the traction machine pulls the counterweight and the carriage through the suspension equipment.

3. The twin elevator system according to claim 2, wherein, In each of the first carriage lifting system and the second carriage lifting system, the counterweight and the carriage are connected to the suspension rope or the suspension belt through a rope socket or a sheave set.

4. The twin elevator system according to claim 2, wherein, Each of the first carriage lifting system and the second carriage lifting system further includes: Compensation equipment, which includes a compensation rope or a compensation chain connecting the counterweight and the carriage and at least one compensation wheel around which the compensation rope or the compensation chain passes, or includes a compensation weight block arranged at the bottom of the carriage.

5. The twin elevator system according to claim 1, wherein, Reserve a preparation space for installing the second carriage and the second carriage lifting system. After the installation of the first carriage and the first carriage lifting system is completed, install the second carriage and the second carriage lifting system.

6. The twin elevator system according to claim 5, wherein, After the installation of the first carriage lifting system and the second carriage lifting system is completed, install a safety protection system for preventing the first carriage from colliding with the second carriage.

7. An installation method for a twin elevator system. The twin elevator system includes two carriages. The two carriages are arranged vertically in the same hoistway and can rise and fall separately from each other in the vertical direction. A first carriage lifting system is provided for the first carriage, and a second carriage lifting system is provided for the second carriage; The method includes: Install the first carriage and the first carriage lifting system; After the installation of the first carriage and the first carriage lifting system is completed, install the second carriage and the second carriage lifting system.

8. The installation method of the twin elevator system according to claim 7, further comprising: Reserve a preparation space for installing the second carriage and the second carriage lifting system. After the installation of the first carriage and the first carriage lifting system is completed, install the second carriage and the second carriage lifting system.

9. The installation method of the twin elevator system according to claim 8 further includes: After the installation of the first carriage lifting system and the second carriage lifting system is completed, install a safety protection system for preventing the first carriage from colliding with the second carriage.

10. The installation method of the twin elevator system according to claim 9, wherein, The installation steps of each of the first carriage lifting system and the second carriage lifting system include: The suspension equipment connects the counterweight and the carriage, and the traction machine included in the driving device pulls the counterweight and the carriage through the suspension equipment. The suspension equipment includes a suspension rope or a suspension belt and a plurality of guide wheels around which the suspension rope or the suspension belt passes; The compensation equipment connects the counterweight and the carriage or is arranged at the bottom of the carriage. In the case where the compensation equipment connects the counterweight and the carriage, the compensation equipment includes a compensation rope or a compensation chain and a plurality of compensation wheels around which the compensation rope or the compensation chain passes. In the case where the compensation equipment is arranged at the bottom of the carriage, the compensation equipment includes a compensation weight block.

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