Same-well double-elevator door lock system and elevator

Abstract

According to the same-shaft double-elevator door lock system and the elevators, by means of the physical position relation of an upper elevator car and a lower elevator car in an elevator shaft, collision mechanisms are arranged on the elevator cars and matched with travel switches of different projection planes, when any elevator car reaches a certain floor door area, a collision part of the elevator car can compress the corresponding travel switch of the floor, and therefore the elevator car is prevented from being collided; the door lock loop of the floor where the other lift car is located is bypassed, so that the door lock detection loops of the upper lift car and the lower lift car run independently completely, the safety requirement of relevant laws and regulations for elevator door locks is met, and it is ensured that the door lock states of the two lift cars do not interfere with each other; and the normal operation of the other lift car cannot be influenced by the door opening operation of one lift car. Besides, all structural components such as a travel switch and a landing door switch in the application adopt reliable design of electrical hard connection, and are all electrical safety devices, so that the overall reliability of the system is high, and the system is not easily influenced by factors such as electromagnetic interference.

Description

Technical Field

[0001] The invention relates to the technical field of elevator safety circuits, in particular to a door lock system for double elevators in the same shaft and an elevator. Background Art

[0002] In the existing dual elevator system in the same shaft, the car can only move when the floor door and car door are completely closed. When the hall door of one car is opened, the corresponding hall door circuit will be cut off. In the dual elevator system in the same shaft, this will cause the other running car to stop immediately and cannot continue to operate normally. This mutually influencing working mechanism greatly reduces the collaborative working efficiency of the dual elevator system in the same shaft.

[0003] To solve the above problems, some existing technical solutions adopt PESSRAL technology, such as the door lock bypass control method, system, electronic safety controller and main controller disclosed in Chinese patent CN113460838B, that is, a PCB board is added to each floor door to detect the door lock status, and then provided to the control board for summary and judgment through communication, so as to realize coordinated control of the car door lock status.

[0004] Although this solution can technically realize the independent operation of the two cars, it requires a lot of additional material and maintenance costs in its application. At the same time, because the control board needs to perform summary calculations, it occupies a large amount of communication resources and also increases the load on the control board chip, increasing energy consumption. In addition, in actual operation, it may cause malfunctions due to uncontrollable interference in the operating environment, and its reliability is worse than that of electrical hard-wired lines. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a double elevator door lock system and an elevator in the same shaft, which ensures that the door lock status of the two cars will not affect the normal operation of the other car due to the door opening operation of one car, while meeting the safety requirements of relevant laws and regulations on elevator door locks.

[0006] In order to achieve the above-mentioned objectives, in the first aspect, an embodiment of the present application provides a same-shaft double-elevator door lock system, comprising an upper car and a lower car arranged in the same elevator shaft, a landing door arranged on each floor, a first traction unit for driving the upper car to and fro between different floors and a second traction unit for driving the lower car to and fro between different floors, and a traction drive power supply, each landing door is respectively provided with a first door lock switch, a second door lock switch, a first travel switch and a second travel switch; the first door lock switch and the second door lock switch are configured to be turned on when the corresponding landing door is in a closed state, and to be turned off when the corresponding landing door is in an open state; the first door lock switches on each floor are connected in series to form an upper car door lock circuit connecting the traction drive power supply to the first traction unit; the second door lock switches on each floor are connected in series to form a traction drive power supply to connect the first traction unit to the landing door; A door lock circuit for the lower car connected to the driving power supply is provided. The other end of the first travel switch on each floor is connected in parallel to the traction driving power supply to form an equivalent circuit for the lower car, and the other end of the second travel switch on each floor is connected in parallel to the traction driving power supply to form an equivalent circuit for the upper car. A collision part is provided on each of the upper and lower cars. When the upper car runs to the door opening area of ​​any floor station door, the collision part of the upper car mechanically contacts the first travel switch of the floor to make it conductive, so that the equivalent circuit for the lower car bypasses the second door lock switch of the floor and above. When the lower car runs to the door opening area of ​​any floor station door, the collision part on the lower car mechanically contacts the second travel switch of the floor to make it conductive, so that the equivalent circuit for the upper car bypasses the first door lock switch of the floor and below.

[0007] Optionally, the collision part includes at least one collision bow, which is configured to mechanically contact and conduct the first travel switch or the first travel switch corresponding to the floor when the upper car or the lower car runs to a predetermined position of any floor station door.

[0008] Optionally, a roller which is in mechanical contact with the first travel switch or the first travel switch is pivotally connected to the striker bow.

[0009] Optionally, projection surfaces of the first travel switch and the second travel switch in the vertical direction do not overlap.

[0010] Optionally, the first door lock switch and the second door lock switch are both normally closed micro switches.

[0011] Optionally, the first travel switch and the second travel switch are both normally open travel switches.

[0012] Optionally, the first travel switch and the second travel switch are both installed on a car guide rail arranged in the elevator shaft through a switch bracket.

[0013] In a second aspect, an embodiment of the present application provides an elevator, comprising the same-shaft double-elevator door lock system described in any embodiment of the first aspect.

[0014] The double elevator door lock system and elevator designed by the present invention utilize the physical position relationship between the upper and lower cars in the elevator shaft, and set a collision mechanism on the car, and cooperate with the travel switches of different projection surfaces, so that when any car reaches the door area of ​​a certain floor, its collision part will compress the corresponding travel switch of the floor, and bypass the door lock circuit of the floor where the other car is located, so as to realize the completely independent operation of the door lock detection circuits of the upper and lower cars, which not only meets the safety requirements of relevant laws and regulations for elevator door locks, but also ensures that the door lock states of the two cars do not interfere with each other, and the normal operation of the other car will not be affected by the door opening operation of one car. In addition, all structural parts in this application, such as travel switches, hall door switches, etc., adopt a reliable design of electrical hard connection, all of which are electrical safety devices, and the overall reliability of the system is high, and it is not easily affected by factors such as electromagnetic interference, and the system does not need to occupy too many resources of the elevator main control CPU, thereby greatly reducing the CPU load. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the implementation of the same-shaft double-elevator door lock system provided by the embodiment of the present application;

[0016] Figure 2 It is a circuit diagram of a double elevator door lock system in the same shaft provided by an embodiment of the present application;

[0017] Figure 3 It is a schematic diagram of the conduction of the travel switch provided in the embodiment of the present application;

[0018] Figure 4 yes Figure 1 Enlarged schematic diagram at point A in the middle.

[0019] Among them: elevator shaft 10, upper car 20, first traction unit 21, lower car 30, second traction unit 31, traction drive power supply 40, first door lock switch 50, door lock circuit 51 for upper car, second door lock switch 60, door lock circuit 61 for lower car, first travel switch 70, equivalent circuit 71 for lower car, second travel switch 80, equivalent circuit 81 for upper car, switch bracket 90, car guide rail 91, collision part 100. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] like Figures 1 to 3As shown, in the first aspect, an embodiment of the present application provides a same-shaft double elevator door lock system, taking an elevator device applied to a six-story (1F-6F) building as an example, the building is provided with an elevator shaft 10, and the elevator shaft 10 is provided with an upper car 20 and a lower car 30, a landing door arranged on each floor, a first traction unit 21 for driving the upper car 20 to travel between different floors and a second traction unit 31 for driving the lower car 30 to travel between different floors, and a traction drive power supply 40 for powering the two traction units (21, 31).

[0022] Each landing door is respectively provided with a first door lock switch 50 and a second door lock switch 60. When the corresponding landing door is in a closed state, the first door lock switch 50 and the second door lock switch 60 are configured to be in an on state; and when the corresponding landing door is in an open state, the first door lock switch 50 and the second door lock switch 60 are configured to be in an off state.

[0023] In the elevator shaft 10, a first travel switch 70 and a second travel switch 80 are also provided on each floor. The first travel switch 70 is connected between the second door lock switches 60 of any two adjacent floors, and the second travel switch 80 is connected between the first door lock switches 50 of any two adjacent floors. Among them, a collision part 100 for triggering the conduction of the first travel switch 70 is provided on the upper car 20, and a collision part 100 for triggering the conduction of the second travel switch 80 is also provided on the lower car 30. In order to avoid interference, in this embodiment, the projection surfaces of the first travel switch 70 and the second travel switch 80 in the vertical direction do not overlap.

[0024] Among them, the first door lock switches 50 on each floor are connected in series to form an upper car door lock circuit 51 connecting the traction drive power supply 40 and the first traction unit 21; the second door lock switches 60 on each floor are connected in series to form a lower car door lock circuit 61 connecting the traction drive power supply 40 and the second traction unit 31.

[0025] In this embodiment, both the first door lock switch 50 and the second door lock switch 60 are normally closed micro switches. That is, when the landing door is closed, the contacts of each first door lock switch 50 remain in contact to form a complete and continuous upper car door lock circuit 51, and the traction drive power supply 40 supplies power to the first traction machine unit 21 through the upper car door lock circuit 51, so that the first traction machine unit 21 drives the upper car 20 to run in the elevator shaft 10. Similarly, the contacts of each second door lock switch 60 remain in contact to form a complete and continuous lower car door lock circuit 61, and the traction drive power supply 40 supplies power to the second traction machine unit 31 through the lower car door lock circuit 61, so that the second traction machine unit 31 drives the lower car 30 to run in the elevator shaft 10.

[0026] At the same time, the other end of the first travel switch 70 of each floor is connected in parallel to the traction drive power supply 40 to form an equivalent circuit 71 for the lower car, and the other end of the second travel switch 80 of each floor is connected in parallel to the traction drive power supply 40 to form an equivalent circuit 81 for the upper car. In this embodiment, the first travel switch 70 and the second travel switch 80 are both normally open travel switches. That is, when there is no external force acting on the normally closed contacts of the first travel switch 70 and the second travel switch 80, the moving contacts are disconnected from the normally open contacts, and will not interfere with the operation of the upper car door lock circuit 51 or the lower car door lock circuit 61.

[0027] Below, as Figure 2 , Figure 3 As shown in the figure, the upper car door lock circuit 51 and the upper car equivalent circuit 81, and the lower car door lock circuit 61 and the lower car equivalent circuit 71 are described.

[0028] When the lower car 30 runs to the door opening area of ​​any floor station door, the collision part 100 of the lower car 30 mechanically contacts the second travel switch 80 of the floor to turn it on, so that the upper car uses the equivalent circuit 81 to bypass the first door lock switch 50 of the floor and the floors below.

[0029] Specifically, if Figure 3 As shown, the first door lock switch 50 is provided with a 2nd-layer first door lock switch 50a, a 3rd-layer first door lock switch 50b, a 4th-layer first door lock switch 50c, a 5th-layer first door lock switch 50d, and a 6th-layer first door lock switch 50e; the second travel switch 80 is provided with a second travel switch 80a, a second travel switch 80b, a second travel switch 80c, a second travel switch 80d, and a second travel switch 80e.

[0030] Assume that the lower car 30 stops at the 2nd floor. At this time, the collision part 100 on the lower car 30 will mechanically contact the second travel switch 80b located between the 2nd and 3rd floors to connect it. This constitutes an equivalent door lock circuit of the upper car 20, that is, the traction drive power supply 40 is directly connected to the first door lock switches (50b, 50c, 50d, 50e) on the 3rd floor and above through the travel switch 80b. Even if the landing door on the 2nd floor is opened at this time, causing the first door lock switch 50a on the 2nd floor to be disconnected, the door lock circuit of the upper car still remains intact (such as Figure 3 The traction drive power supply 40 can still supply power to the first traction unit 21, ensuring that the upper car 20 can operate normally on the 3rd floor and above. This effectively avoids the impact of the lower car 30 opening the door on the 2nd floor on the operation of the upper car 20, thus realizing the independent operation of the two cars.

[0031] Similarly, when the upper car 20 runs to the door opening area of ​​any floor station door, the collision part 100 of the upper car 20 mechanically contacts the first travel switch 70 of that floor to make it conductive. At this time, the lower car uses the equivalent circuit 71 to bypass the second door lock switch 60 of that floor and above.

[0032] Specifically, if Figure 3 As shown, the second door lock switch 60 is provided with a 1st layer second door lock switch 60a, a 2nd layer second door lock switch 60b, a 3rd layer second door lock switch 60c, a 4th layer second door lock switch 60d, and a 5th layer second door lock switch 60e; the first travel switch 70 is provided with a first travel switch 70a, a first travel switch 70b, a first travel switch 70c, a first travel switch 70d, and a first travel switch 70e.

[0033] by Figure 3 For example, assuming that the upper car 20 stops at the 4th floor, at this time, the collision part 100 on the upper car 20 will mechanically contact the first travel switch 70c located between the 3rd and 4th floors to turn it on, which will activate the equivalent circuit 71 for the lower car, that is, the traction drive power supply 40 is directly connected to the second door lock switches (60a, 60b, 60c) on the 1st, 2nd and 3rd floors through the turned-on travel switch 70c. Even if the landing door on the 4th floor is opened at this time, causing the second door lock switch 60d on the 4th floor to be disconnected, the door lock circuit of the lower car still remains intact (such as Figure 3 The traction drive power supply 40 can still supply power to the second traction unit 31, ensuring that the lower car 30 can operate normally on the 1st, 2nd and 3rd floors, which effectively avoids the impact of the upper car 20 opening the door on the 4th floor on the operation of the lower car 30.

[0034] In summary, the system utilizes the change in car position and the mechanical collision of the collision part 100 to dynamically change the effective range of the upper car door lock circuit 51 and the lower car door lock circuit 61, ensuring that the door lock states of the two cars are independent and do not interfere with each other, thereby significantly improving the collaborative working efficiency of the dual elevator system in the same shaft; at the same time, the system adopts electrical hard connection, which not only meets the requirements of elevator safety regulations, but also does not require complex electronic control, has lower costs, and is easier to maintain.

[0035] It can be understood that when the upper car 20 and the lower car 30 are both parked at different floors, at this time, although the corresponding first travel switch 70 and the second travel switch 80 are both triggered and turned on, making the upper car door lock circuit 51 and the lower car door lock circuit 61 invalid, but because the two cars are parked at the same floor, the open landing door will cause the corresponding first door lock switch 50 and the second door lock switch 60 to be disconnected, so that even if there are equivalent circuits 71 for the lower car and equivalent circuits 81 for the upper car, the two upper cars 20 and the lower car 30 cannot operate, thereby ensuring the safety of the elevator. In addition, in this embodiment, the collision part 100 can adopt a variety of mechanical structures, as long as it can reliably trigger the corresponding travel switch when the upper car 20 and the lower car 30 reach the predetermined position. For example, a roller or slider structure can be used, which is installed on the car and slides along the guide rail on the inner wall of the hoistway. When the roller or slider reaches the predetermined position, the travel switch will be triggered. This structure can reduce friction and wear and improve the reliability of the system.

[0036] In some embodiments, Figure 1 , Figure 4 As shown, the collision part 100 includes at least one collision bow, which is configured to mechanically contact and conduct the first travel switch 70 or the first travel switch 80 corresponding to the floor when the upper car 20 or the lower car 30 runs to a predetermined position of any landing door.

[0037] When implementing it, Figure 1 , Figure 4 As shown, at least one striker is installed on both the upper car 20 and the lower car 30 as a collision part 100, and these strikers extend out of the car toward the inner wall of the hoistway. In this embodiment, the first travel switch 70 and the second travel switch 80 are both installed on the car guide rail 91 provided in the elevator hoistway 10 through the switch bracket 90. In this way, when the car runs to a predetermined position in the door opening area of ​​a landing door on a certain floor, the striker will mechanically contact the first travel switch 70 or the first travel switch 80 corresponding to the floor.

[0038] In this embodiment, the car guide rail 91 itself is a necessary structure in the elevator shaft 10, which is easy to inspect and debug. By installing the travel switch here through the switch bracket 90, it can be more convenient to install, debug and maintain in the later stage. Moreover, installing the travel switch on the guide rail can effectively utilize the shaft space and avoid occupying extra space. In addition, the general impact bow is also a common component on the car. The impact bow moves vertically up and down with the car. When the car runs to the top or bottom and exceeds the parking level, the impact bow will hit the speed change, limit or limit switch, thereby cutting off the elevator control circuit and stopping the elevator to prevent the car from hitting the bottom and the top. Therefore, the impact bow is used as the collision part 100 in this embodiment, which gives the impact bow a new ability, that is, through the change of the car position, the impact bow is used to dynamically change the effective range of the door lock circuit, which avoids the need to add a new mechanical structure to the car, simplifies the design and installation, and reduces the difficulty of debugging.

[0039] In another example, if Figure 4 As shown, a roller is pivotally connected to the striker bow and is in mechanical contact with the first travel switch 70 or the first travel switch 80. The roller can roll in contact with the travel switch, which can significantly reduce friction and wear compared to direct sliding contact of the striker bow, thereby increasing the service life of the travel switch and the striker bow and reducing the system failure rate.

[0040] In a second aspect, an embodiment of the present application provides an elevator, including a double elevator door lock system in the same shaft according to any embodiment of the first aspect. Since the elevator adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0041] The double elevator door lock system and elevator in the same shaft provided in this embodiment utilize the physical position relationship between the upper and lower cars in the elevator shaft, and by setting a collision mechanism on the car, and cooperating with the travel switches of different projection surfaces, when any car reaches the door area of ​​a certain floor, its collision part will compress the corresponding travel switch of the floor, and bypass the door lock circuit of the floor where the other car is located, so as to realize the completely independent operation of the door lock detection circuits of the upper and lower cars, which not only meets the safety requirements of relevant laws and regulations for elevator door locks, but also ensures that the door lock states of the two cars do not interfere with each other, and the normal operation of the other car will not be affected by the door opening operation of one car. In addition, all structural parts in this application, such as travel switches, hall door switches, etc., adopt a reliable design of electrical hard connection, all of which are electrical safety devices, and the overall reliability of the system is high, and it is not easily affected by factors such as electromagnetic interference, and the system does not need to occupy too many resources of the elevator main control CPU, thereby greatly reducing the CPU load.

[0042] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A door lock system for double elevators in the same shaft, comprising an upper car and a lower car arranged in the same elevator shaft, a landing door arranged on each floor, a first traction unit for driving the upper car to go back and forth between different floors and a second traction unit for driving the lower car to go back and forth between different floors, and a traction drive power supply, characterized in that: Each landing door is respectively provided with a first door lock switch, a second door lock switch, a first travel switch and a second travel switch; the first door lock switch and the second door lock switch are configured to be turned on when the corresponding landing door is in a closed state, and to be turned off when the corresponding landing door is in an open state; the first door lock switches on each floor are connected in series to form an upper car door lock circuit connecting the traction drive power supply to the first traction unit; the second door lock switches on each floor are connected in series to form a lower car door lock circuit connecting the traction drive power supply to the second traction unit; the other end of the first travel switch on each floor is connected in parallel to the traction drive power supply to form an equivalent circuit for the lower car, The other end of the second travel switch on the floor is connected in parallel to the traction drive power supply to form an equivalent circuit for the upper car; a collision part is provided on the upper car and the lower car; wherein, when the upper car runs to the door opening area of ​​any floor station door, the collision part of the upper car mechanically contacts the first travel switch of the floor to make it conductive, so that the equivalent circuit of the lower car bypasses the second door lock switch of the floor and above; when the lower car runs to the door opening area of ​​any floor station door, the collision part on the lower car mechanically contacts the second travel switch of the floor to make it conductive, so that the equivalent circuit of the upper car bypasses the first door lock switch of the floor and below.

2. The door lock system for double elevators in the same shaft according to claim 1, characterized in that: The collision part includes at least one collision bow, which is configured to mechanically contact and conduct the first travel switch or the first travel switch corresponding to the floor when the upper car or the lower car runs to a predetermined position of any floor station door.

3. The door lock system for double elevators in the same shaft according to claim 2, characterized in that: The striking bow is pivotally connected with a roller which is in mechanical contact with the first travel switch or the first travel switch.

4. The door lock system for double elevators in the same shaft according to claim 1, characterized in that: The projection surfaces of the first travel switch and the second travel switch in the vertical direction do not overlap.

5. The door lock system for double elevators in the same shaft according to claim 1, characterized in that: The first door lock switch and the second door lock switch are both normally closed micro switches.

6. The door lock system for double elevators in the same shaft according to claim 1, characterized in that: The first travel switch and the second travel switch are both normally open travel switches.

7. The door lock system for double elevators in the same shaft according to claim 1, characterized in that: The first travel switch and the second travel switch are both installed on a car guide rail arranged in the elevator shaft through a switch bracket.

8. An elevator, characterized in that: The invention comprises the door lock system for double elevators in the same shaft as described in any one of claims 1 to 7.

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