A system layout method for a twin elevator

Abstract

The present application discloses a system layout mode of a twin elevator, including: two carriages arranged in sequence along the height direction in the same hoistway, with the side where the carriages open doors in the depth direction of the carriages being the front side and the opposite side being the rear side; two driving devices whose vertical projections are located outside the vertical projections of the carriages and partially located in the machine room, and the machine room is located at the rear side of the top of the hoistway; a counterweight located at the rear side in the hoistway and below the two driving devices; two guiding sheave groups located in the hoistway and whose vertical projections are respectively at the left rear side and the right rear side of the vertical projections of the carriages; a traction rope, both ends of the traction rope are directly or indirectly connected to the hoistway or the machine room through corresponding rope end devices, and the traction rope sequentially winds around one of the carriages, one of the guiding sheave groups, one of the driving devices, the counterweight, the other driving device, the other guiding sheave group, the other carriage until the other end of the traction rope starting from one end.

Description

Technical Field

[0001] This application relates to the technical field of elevators, and particularly to a system layout method for twin elevators. 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 operate 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] There are many old elevator renovation projects in the existing market. Due to the insufficient design capacity of the elevator's carrying capacity in the early stage, the operating efficiency of the elevator is too low during the morning and evening peak hours. On the premise that the hoistway resources cannot be increased, the design scheme of twin elevators is very suitable.

[0004] However, the existing twin elevators in the market also have their disadvantages. For example, in the system layout of the existing twin elevators in the market, since two carriages need to be additionally equipped with a set of counterweights and other related safety components, the utilization rate of the hoistway is significantly smaller compared with that of a single elevator, which also limits the improvement of the overall transportation efficiency of twin elevators.

[0005] Also, for example, in the peak operation mode such as when passengers go to and from work, the two carriages need to operate independently at the same time. However, passengers entering the lower carriage cannot directly reach the top floor, and passengers entering the upper carriage cannot directly reach the bottom floor. This makes a small number of such passengers need to transfer to another carriage or walk one floor to reach the destination floor, and the passenger experience is poor, especially for some passengers with walking difficulties such as those who need to take a wheelchair, which also becomes an important technical bottleneck for the popularization of twin elevators.

[0006] Therefore, it is particularly necessary to provide a twin elevator that can allow both carriages to reach the top floor or the bottom floor, and at the same time can better optimize the spatial layout of the main components such as the carriage, counterweight, and driving device, so as to improve the utilization rate of the hoistway plan and meet the various maintenance and use requirements of the product. For example, consider moving the upper carriage into the machine room space for avoidance to ensure that the lower carriage can run to the top floor, and design an optimal traction layout method. Summary of the Invention

[0007] To solve the above problems existing in the existing twin elevator technology, this application provides a system layout method for twin elevators, including:

[0008] Two carriages arranged in the same hoistway in sequence along the height direction. On the depth direction of the carriage, the side where the door opens is the front side, and the opposite side is the rear side;

[0009] Two driving devices whose vertical projections are located outside the vertical projection of the car and partially located in the machine room, and the machine room is at the rear side of the top of the hoistway;

[0010] A counterweight located at the rear side inside the hoistway and below the two driving devices;

[0011] Two guide sheave groups located inside the hoistway and whose vertical projections are respectively at the left rear side and the right rear side of the vertical projection of the car;

[0012] A traction rope, both ends of the traction rope are directly or indirectly connected to the hoistway or the machine room through corresponding socket devices, and the traction rope sequentially winds around one car, one pair of guide sheave groups, one driving device, the counterweight, the other driving device, the other pair of guide sheave groups, the other car until the other end of the traction rope starting from one end.

[0013] The following also provides several optional ways, but it is not an additional limitation to the above overall solution, but only further supplementation or preference. Without technical or logical contradictions, each optional way can be combined with the above overall solution alone, or multiple optional ways can be combined with each other.

[0014] Optionally, a partition wall is provided between the hoistway and the machine room, and the partition wall is provided with an avoidance area corresponding to the position of the driving device.

[0015] Optionally, the top of the hoistway is a car avoidance space at the front side of the machine room, and the car avoidance space can at least allow the car to enter.

[0016] Optionally, the remaining parts of the two driving devices except the traction wheels are located in the machine room.

[0017] Optionally, the line connecting the midpoint of the front side and the midpoint of the rear side of the car is the front-rear center line, and the two driving devices are symmetrically arranged on both sides of the front-rear center line of the car.

[0018] Optionally, the two guide sheave groups are arranged symmetrically left and right with respect to the front-rear center line of the car, and each side of the guide sheave group includes two guide sheaves arranged up and down, and the sides of the two guide sheaves are respectively parallel to the side of the car facing the guide sheave group.

[0019] Optionally, in the same guide sheave group, the upper guide sheave is located above the traction wheel of the corresponding driving device, and the lower guide sheave is located below the traction wheel of the corresponding driving device;

[0020] The traction rope sequentially winds around the lower guide sheave, the upper guide sheave, and then to one of the cars starting from one driving device.

[0021] Optionally, each car is suspended with a traction ratio of 2:1, and the counterweight is suspended with a traction ratio of 4:1.

[0022] Optionally, two first counterweight deflection wheels are provided at the top of the counterweight, and the two first counterweight deflection wheels are symmetrically arranged relative to the front and rear center lines of the car. A second counterweight deflection wheel is provided at the top of the hoistway. The vertical projection position of the second counterweight deflection wheel is between the two first counterweight deflection wheels, and the vertical projection of the axis of the second counterweight deflection wheel coincides with the vertical projection of the front and rear center lines of the car. The axes of all counterweight deflection wheels are parallel to each other;

[0023] The traction rope sequentially winds around one of the first counterweight deflection wheels, the second counterweight deflection wheel, the other first counterweight deflection wheel, and until the other driving device starting from a driving device.

[0024] Optionally, two first car bottom wheels are provided at the bottom of the upper car, and the traction rope extends upward to the corresponding rope socket device and driving device respectively after winding around the two first car bottom wheels;

[0025] Two second car bottom wheels are provided at the bottom of the lower car, and the traction rope extends upward to the corresponding rope socket device and driving device respectively after winding around the two second car bottom wheels;

[0026] The vertical projection connection line of the two first car bottom wheels and the vertical projection connection line of the two second car bottom wheels are arranged in an X shape, and the X shape is symmetrically arranged relative to the front and rear center lines of the car.

[0027] The system layout method of the twin elevators in this application has at least one of the following technical effects: separating the machine room part originally located above the car at the top of the hoistway with a metal sheet to be used as the shelter space for the upper car, ensuring that the lower car can reach the top floor of the building; in order to avoid the running space of the top car being restricted due to the driving device being arranged within the vertical projection of the car, arranging both driving devices above the counterweight can well improve the utilization rate of the hoistway plane and the space at the top of the hoistway; separating the traction wheel part of the two driving devices from the rest with a metal sheet can ensure that the driving device can be maintained daily in the machine room and meet the normal emergency rescue function while the traction wheel and its suspension rope can be smoothly connected to the car; due to the defect that the two cars of the twin elevator cannot reach the bottom layer at the same time, it is usually suitable to be used when multiple hoistways are arranged side by side and one of the hoistways is used to arrange a single elevator, and arranging the counterweight and the driving device at the rear side of the hoistway can ensure that the same layout can also be adopted when two or more than three hoistways are arranged side by side; the two cars share a balance device, which is not only convenient for installation and cost-saving, but also can effectively improve the utilization rate of the hoistway plane. Description of the Drawings

[0028] Figure 1 This is the front view of an embodiment of the system layout of a twin elevator in this application;

[0029] Figure 2 It is Figure 1 The lateral sectional view after removing the car;

[0030] Figure 3 It is Figure 1 The schematic top view of the first car in

[0031] Figure 4 It is Figure 1 The schematic top view of the second car in

[0032] The explanations of the reference numerals in the figure are as follows:

[0033] 1. First car; 2. Second car; 3. Hoistway; 4. Machine room; 5. Traction rope; 6. Metal partition; 7. First driving device; 8. Second driving device; 9. Support frame; 10. First upper guide pulley; 11. Second upper guide pulley; 12. First lower guide pulley; 13. Second lower guide pulley; 14. Left bottom wheel of the second car; 15. Right bottom wheel of the second car; 16. Right bottom wheel of the first car; 17. Left bottom wheel of the first car; 18. Second counterweight turning pulley; 19. First counterweight turning pulley; 20. First counterweight turning pulley; 21. Balance counterweight; 22. Front and rear center line of the car; 23. Car avoidance space; 24. First rope socket device; 25. Second rope socket device. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0035] For a better description and illustration of the embodiments of this application, one or more accompanying drawings can be referred to, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of any one of the inventions, currently described embodiments or preferred modes of this application.

[0036] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may also be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0038] As Figures 1 to 4 shown, an embodiment of this application provides a system layout of a twin elevator, including:

[0039] Two carriages arranged in sequence along the height direction in the same hoistway 3;

[0040] Two driving devices whose vertical projections are located outside the vertical projections of the carriages and part of whose space is located in the machine room;

[0041] A metal partition 6 located at the top of the hoistway 3, passing through the two driving devices, to isolate the top space of the hoistway that the carriage can reach from the machine room 4;

[0042] A counterweight 21 located at the rear side inside the hoistway 3 and below the two driving devices;

[0043] Two sets of guiding sheave groups arranged vertically and whose vertical projection planes are respectively located at the left rear side and the right rear side outside the vertical projection plane of the carriage inside the hoistway 3;

[0044] A traction rope 5, both ends of the traction rope 5 are directly or indirectly connected to the hoistway 3 through corresponding rope end devices, and the traction rope 5 starts from one end and successively winds around one of the carriages, one of the sets of guiding sheave groups, one of the driving devices, the counterweight, the other driving device, the other set of guiding sheave groups, the other carriage until the other end of the traction rope 5.

[0045] In the system layout of the twin elevator in this embodiment, a first carriage 1 and a second carriage 2 are installed. The two carriages are arranged in sequence along the height direction in the elevator hoistway 3, and the first carriage 1 is directly below the second carriage 2. A counterweight 21 is configured inside the hoistway 3, and the counterweight 21 is located below the two driving devices. The first carriage 1, the second carriage 2 and the counterweight 21 are suspended inside the hoistway 3 through a common traction rope 5. One end of the traction rope 5 is directly or indirectly fixed to the hoistway 3 through a first rope end device 24, and then successively winds around the right bottom wheel 15 of the second carriage, the left bottom wheel 14 of the second carriage, the first upper guiding wheel 10, the first lower guiding wheel 12, the first driving device 7, the first counterweight turning wheel 19, the second counterweight turning wheel 18, the first counterweight turning wheel 20, the second driving device 8, the second lower guiding wheel 13, the second upper guiding wheel 11, the right bottom wheel 16 of the first carriage, the left bottom wheel 17 of the first carriage, and finally is directly or indirectly fixed to the hoistway 3 through a second rope end device 25.

[0046] In the above, the traction rope 5 is connected from the first driving device 7 to the second car 2 through a set of guide wheels composed of the first upper guide wheel 10 and the first lower guide wheel 12. The first upper guide wheel 10 is arranged at the highest possible position above the first driving device 7 for two purposes. First, to ensure that the second car 2 can run to a higher position. Second, to maximize the distance between the first upper guide wheel 10 and the first lower guide wheel 12, reducing the wear risk of the traction rope 5 caused by the reverse arrangement of the rope wheels. The first lower guide wheel 12 is arranged at a position below the first driving device 7. The vertical projection of the axis centerlines of the first upper guide wheel 10 and the first lower guide wheel 12 is set to be perpendicular to the front-rear centerline 22 of the car, ensuring that the set of guide wheels occupies the smallest cross-sectional space in the hoistway plane. Another set of guide wheels is arranged symmetrically with the above set of guide wheels.

[0047] In the above, the counterweight 21, the first counterweight turning wheels 19, 20, and the second counterweight turning wheel 18 are arranged symmetrically left and right along the front-rear centerline 22 of the car. Such an arrangement can maximize the utilization rate of the hoistway plane.

[0048] In the above, the first driving device 7 and the second driving device 8 are arranged symmetrically left and right along the front-rear centerline 22 of the car. The first driving device 7, the second driving device 8, and the second counterweight turning wheel are jointly installed on the support frame 9. All or part of the structure of the support frame 9 is located in the machine room 3. The support frame 9 can also be designed as a symmetric structure, which is beneficial for installation and manufacturing.

[0049] In the system arrangement of the twin elevator in this embodiment, a metal partition 6 is also installed. The metal partition 6 isolates the space at the top of the hoistway from the machine room 3. The isolated space above the machine room floor is regarded as the car refuge space 23. This space can accommodate at least the structural space of the entire second car 2. The metal partition 6 is arranged such that its vertical projection is all or partially located in the hoistway plane, but its projection does not coincide with the vertical projection of the car and maintains a minimum distance of at least 50 mm, ensuring that the car can freely and safely run into the car refuge space 23 at the top of the hoistway. The metal partition 6 partially separates the first driving device 7 and the second driving device 8. Among them, the structural part of the driving device connected to the traction rope 5 is separated and located in the car refuge space, and the remaining part of the driving device is separated and located in the machine room, so as to ensure that the daily maintenance personnel of the elevator can perform routine maintenance on the driving device and also meet the emergency rescue function in case of an elevator entrapment failure.

[0050] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0051] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A system layout method for a twin elevator, characterized in that, it includes: Two carriages arranged in sequence along the height direction in the same hoistway. The side where the carriage door opens in the depth direction of the carriage is the front side, and the opposite side is the rear side; Two driving devices whose vertical projections are located outside the vertical projections of the carriages and partially located in the machine room. The machine room is located at the rear side of the top of the hoistway; A counterweight located at the rear side in the hoistway and below the two driving devices; Two guide sheave groups located in the hoistway and whose vertical projections are respectively at the left rear side and the right rear side of the vertical projections of the carriages; A traction rope, both ends of the traction rope are directly or indirectly connected to the hoistway or the machine room through corresponding rope socket devices. The traction rope starts from one end and successively winds around one of the carriages, one of the pairs of guide sheave groups, one of the driving devices, the counterweight, the other driving device, the other pair of guide sheave groups, the other carriage until the other end of the traction rope; A partition wall is provided between the hoistway and the machine room, and the partition wall is provided with an avoidance area corresponding to the position of the driving device; The top of the hoistway is a carriage avoidance space located at the front side of the machine room, and the carriage avoidance space can at least allow the carriage to enter; Two first car bottom wheels are provided at the bottom of the upper carriage. After the traction rope winds around the two first car bottom wheels, it respectively extends upward to the corresponding rope socket device and the driving device; Two second car bottom wheels are provided at the bottom of the lower carriage. After the traction rope winds around the two second car bottom wheels, it respectively extends upward to the corresponding rope socket device and the driving device; The vertical projection connection line of the two first car bottom wheels and the vertical projection connection line of the two second car bottom wheels are arranged in an X shape, and this X shape is symmetrically arranged with respect to the front and rear center line of the carriage.

2. The system layout method for a twin elevator according to claim 1, characterized in that, The remaining parts of the two driving devices except the traction wheels are located in the machine room.

3. The system layout method for a twin elevator according to claim 2, characterized in that, The connection line between the midpoints of the front side and the rear side of the carriage is the front and rear center line, and the two driving devices are symmetrically arranged on both sides of the front and rear center line of the carriage.

4. The system layout method for a twin elevator according to claim 1, characterized in that, The two guide sheave groups are symmetrically arranged left and right with respect to the front and rear center line of the carriage. Each side of the guide sheave group includes two guide sheaves arranged up and down. The sides of the two guide sheaves are respectively parallel to the side of the carriage facing the guide sheave group.

5. The system layout method for a twin elevator according to claim 4, characterized in that, In the same guide sheave group, the upper guide sheave is located above the traction wheel of the corresponding driving device, and the lower guide sheave is located below the traction wheel of the corresponding driving device; The traction rope starts from one driving device and successively winds around the lower guide sheave, the upper guide sheave, and then to one of the carriages.

6. The system layout method for a twin elevator according to claim 1, characterized in that, Each carriage is suspended with a traction ratio of 2:1, and the counterweight is suspended with a traction ratio of 4:

1.

7. The system layout method for a twin elevator according to claim 1, characterized in that, Two first counterweight steering wheels are provided at the top of the balance counterweight, and the two first counterweight steering wheels are symmetrically arranged relative to the front-rear center line of the car. A second counterweight steering wheel is provided at the top of the hoistway. The vertical projection position of the second counterweight steering wheel is between the two first counterweight steering wheels, and the vertical projection of the axis of the second counterweight steering wheel coincides with the vertical projection of the front-rear center line of the car. The axes of all the counterweight steering wheels are parallel to each other; The traction rope sequentially winds around one of the first counterweight steering wheels, the second counterweight steering wheel, the other first counterweight steering wheel, and until the other driving device starting from a driving device.

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