Elevator safety device

Abstract

The utility model provides an elevator safety device which is characterized in that a first detection assembly is installed on a speed limiting device in an elevator shaft, a second detection assembly is installed on a tensioning device, a third detection assembly is installed on a swing arm device, and whether the elevator is in a normal working state or not is detected and judged. And when each device is not in a normal working state, a fault is generated. In this way, all parts of the elevator installation device can be detected, and compared with manual overhaul, the overhaul time is greatly shortened; and when a fault occurs, a worker only needs to maintain the device which detects that the fault occurs, so that manpower is saved, and the maintenance efficiency of the elevator is improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of elevator monitoring systems, and in particular to an elevator safety device. Background Art

[0002] The elevator safety device is a locking device that can trigger the elevator safety clamp to clamp the guide rail when the elevator overspeeds or falls, thereby protecting the elevator. The elevator safety device includes: a swing arm device, a wire rope, a wire rope tensioning device, and a wire rope speed limiter. The wire rope is respectively lapped on the roller of the swing arm device, the roller of the speed limiter, and the roller of the tensioning device.

[0003] The speed limiter is installed at the top of the elevator shaft, the tensioner is installed at the bottom of the elevator shaft, and the wire rope device passes through the rope pulley of the speed limiter and the tensioner pulley of the tensioner to connect the speed limiter and the tensioner together to achieve synchronous operation.

[0004] Depending on the floor height and the running speed of the elevator, the tensioning device can provide the speed limiter with a matching tensioning force. When the elevator overspeeds or falls, the speed limiter has enough pulling force to trigger the elevator safety clamp to prevent accidents.

[0005] Existing elevator safety devices need to be regularly inspected to ensure that they can play a safety role when the elevator is in danger. However, the existing inspection process requires manual inspection, and the elevator needs to be stopped during the inspection, resulting in long inspection time, low work efficiency, and affecting the normal operation of the elevator. Utility Model Content

[0006] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide an elevator safety device.

[0007] The utility model provides an elevator safety device, which is installed in an elevator shaft and is used to limit the position of the elevator car when a fault occurs. An elevator guide rail is also installed in the elevator shaft, comprising:

[0008] A steel wire rope connected to the elevator car and used to drive the elevator car to move under the action of an external force;

[0009] A speed limiting device, the speed limiting device is installed at the top of the elevator shaft, the steel wire rope is overlapped on the speed limiting device; the speed limiting device is used to prevent the steel wire rope from moving when the elevator car falls;

[0010] A tensioning device, the tensioning device is installed at the bottom of the elevator shaft, the steel wire rope is overlapped on the tensioning device, and the tensioning device is used to keep the steel wire rope in a taut state;

[0011] A swing arm device, wherein the swing arm device is installed on the elevator car, the steel wire rope is overlapped on the swing arm device, and the elevator guide rail can be slidably clamped in the swing arm device to maintain the balance of the elevator car; the swing arm device is used to limit the elevator car under the action of the steel wire rope when the elevator car falls;

[0012] a first detection component, the first detection component being installed on the speed limiting device and being used to detect whether the speed limiting device is faulty;

[0013] a second detection component, the second detection component is installed on the tensioning device and is used to detect whether the tensioning device is faulty;

[0014] A third detection component is installed on the swing arm device and is used to detect whether the swing arm device is faulty.

[0015] According to the technical solution provided by the utility model, the speed limiting device includes:

[0016] A first shell, wherein the first shell is fixedly mounted on the top of the elevator shaft;

[0017] A speed limiting wheel, the speed limiting wheel is rotatably mounted on the first housing, and the steel wire rope is laid on the speed limiting wheel;

[0018] A brake wheel, the brake wheel is fixedly connected to the first housing and is coaxially arranged with the speed limiting wheel;

[0019] A swing block, one end of which is rotatably mounted on the speed limiting wheel, and the other end of which is a free end, on which a first sensing element is fixedly mounted; a limit pin is fixedly mounted on the swing block; when the free end moves away from the rotating axis of the speed limiting wheel under the centrifugal effect generated by the rotation of the speed limiting wheel, the limit pin abuts against the brake wheel to prevent the speed limiting wheel and the wire rope from moving;

[0020] A first elastic member, one end of which is fixedly connected to the speed limiting wheel, and the other end of which is fixedly connected to the swing block, is used to drive the free end to move closer to the rotation axis of the speed limiting wheel when the free end is away from the rotation axis of the speed limiting wheel.

[0021] According to the technical solution provided by the utility model, the first detection component includes:

[0022] A first sensor, wherein the detection direction of the first sensor is parallel to the axis of the speed limiting wheel, and is used to detect the first sensing element when the speed limiting wheel rotates too fast;

[0023] A first processor is installed on the first housing and is electrically connected to the first sensor, and is used for issuing an alarm when the first sensor detects the first sensing element.

[0024] According to the technical solution provided by the utility model, the tensioning device includes:

[0025] A second shell, the second shell is fixedly mounted at the bottom of the elevator shaft; a sliding groove is provided on the second shell in a vertical direction;

[0026] A sliding block, the sliding block can be slidably installed in the sliding groove;

[0027] A tension wheel, the tension wheel is rotatably connected to the sliding block; the steel wire rope is laid on the tension wheel; a second induction member is fixedly mounted on the sliding block;

[0028] A second elastic member, one end of which is mounted on the second housing, and the other end of which is connected to the sliding block, is used to drive the sliding block to slide along the sliding groove, so that the steel wire rope is in a taut state.

[0029] According to the technical solution provided by the utility model, the second detection component includes:

[0030] A second sensor assembly, wherein the second sensor assembly is fixedly mounted on the second housing, and the detection direction is toward the second sensing element; the second sensing element is used to cooperate with the second sensor assembly to detect the position of the sliding block;

[0031] The second processor is installed on the second housing and is used to receive the position of the sliding block detected by the second sensor assembly, and to issue an alarm when the sliding block is not within a first set position range.

[0032] According to the technical solution provided by the utility model, the second sensor component includes:

[0033] A second sensor, wherein a plurality of the second sensors are provided and are arranged in sequence along a vertical direction and installed on the second housing;

[0034] The second sensor which is the highest in the vertical direction is at the same height as the highest position of the sliding block in the vertical direction when no failure occurs;

[0035] The second sensor which is lower in the vertical direction is at the same height as the lowest position of the sliding block in the vertical direction when no failure occurs;

[0036] When the sliding block is in the first set position range, the detection direction of one of the second sensors faces the second sensing element; when multiple first sensors fail to detect the second sensing element, it indicates that a fault occurs.

[0037] According to the technical solution provided by the utility model, the swing arm device includes:

[0038] A connecting block, one side of which is fixedly mounted on the elevator car, and the other side of which is clamped on the elevator guide rail and can slide relative to the elevator guide rail; a third induction member is fixedly mounted on the connecting block;

[0039] a third housing, the third housing being rotatably mounted on the connecting block;

[0040] A swing arm wheel is rotatably mounted on the third housing, and the steel wire rope is laid on the swing arm wheel.

[0041] According to the technical solution provided by the utility model, the third detection component includes:

[0042] A third sensor assembly, wherein the third sensor assembly is fixedly mounted on the third housing, and the detection direction is toward the third sensing element; the third sensing element is used to cooperate with the third sensor assembly to detect whether the swing arm wheel is in the second set position range;

[0043] A third processor is mounted on the third housing and is electrically connected to the third sensor assembly, and is used for issuing an alarm when the third sensor assembly cannot detect the third sensing element.

[0044] According to the technical solution provided by the utility model, the third sensor component includes:

[0045] A third sensor, wherein a plurality of the third sensors are provided and are arranged in sequence along a vertical direction and mounted on the third housing;

[0046] When no fault occurs and the swing arm wheel is at the highest position in the vertical direction, the detection direction of the third sensor at the lowest position in the vertical direction faces the third sensing element;

[0047] When no fault occurs and the swing arm wheel is at the lowest position in the vertical direction, the detection direction of the third sensor at the highest position in the vertical direction faces the third sensing element;

[0048] When the swing arm wheel is in the second set position, the detection direction of one of the third sensors faces the third sensing element; when multiple third sensors fail to detect the third sensing element, it indicates that a fault has occurred.

[0049] The beneficial effects of the utility model are:

[0050] The first detection component is installed on the speed limiting device in the elevator shaft, the second detection component is installed on the tensioning device, and the third detection component is installed on the swing arm device to detect and determine whether it is in normal working condition. When each device is not in normal working condition, it means that a fault has occurred. This method can detect each component of the elevator installation device separately, which greatly reduces the maintenance time compared to manual maintenance; when a fault occurs, the staff only needs to repair the device that has been detected to have a fault, which saves manpower and improves the maintenance efficiency of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0052] Figure 1 is a schematic diagram of the structure of the speed limiting device;

[0053] Figure 2 It is a schematic diagram of the internal structure of the speed limiting device;

[0054] Figure 3 is a schematic diagram of the installation position of the first elastic member;

[0055] Figure 4 is a structural schematic diagram of a tensioning device;

[0056] Figure 5 It is another structural schematic diagram of the tensioning device;

[0057] Figure 6 It is a structural schematic diagram of the swing arm device;

[0058] Figure 7 is another structural schematic diagram of the swing arm device;

[0059] Figure 8 It is a structural schematic diagram of the guide shoe device;

[0060] Among them: 1. Elevator guide rail; 2. Steel wire rope; 3. Speed ​​limiting device; 4. Tensioning device; 5. Swing arm device; 6. Guide shoe device; 7. First induction element; 8. First sensor; 9. First processor; 10. First distance sensor; 11. First time sensor; 12. Second induction element; 13. Second processor; 14. Second sensor; 15. Second distance sensor; 16. Second time sensor; 17. Third induction element; 18. Third processor; 19. Third sensor; 20. Fourth induction element; 21. Third distance sensor; 22. Third time sensor; 23. Fourth sensor; 24. Fourth processor; 25. Fifth induction element; 26. Swing arm shaft;

[0061] 31. first housing; 32. speed limiting wheel; 33. brake wheel; 34. swing block; 35. limit pin; 36. first elastic member;

[0062] 41. second housing; 42. sliding groove; 43. sliding block; 44. tensioning wheel; 45. second elastic member;

[0063] 51. Connecting block; 52. Third housing; 53. Swing arm wheel;

[0064] 61. Bracket; 62. Guide wheel. DETAILED DESCRIPTION

[0065] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings.

[0066] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0067] The utility model provides an elevator safety device, which is installed in an elevator shaft and is used to limit the position of the elevator car when a fault occurs. An elevator guide rail 1 is also installed in the elevator shaft, including:

[0068] A steel wire rope 2, connected to the elevator car, for driving the elevator car to move under the action of an external force;

[0069] A speed limiting device 3, which is installed at the top of the elevator shaft and is used to prevent the steel wire rope 2 from moving when the elevator car falls;

[0070] The steel wire rope 2 is overlapped on the speed limiting device 3;

[0071] A first detection component is installed on the speed limiting device 3 and is used to detect whether the speed limiting device 3 is faulty.

[0072] Specifically, a detection assembly is installed on the speed limiting device, tensioning device, swing arm device, and guide shoe device in the elevator shaft to detect each device and determine whether it is in a normal working state. If each device is not in a normal working state, it means that a fault has occurred.

[0073] The method of installing detection components on each device can detect each component of the elevator's installation device separately, which greatly reduces the maintenance time compared with manual maintenance; when a fault occurs, the staff only needs to repair the device that detects the fault, which saves manpower and improves the maintenance efficiency of the elevator.

[0074] In some embodiments, the detection assembly is installed on only one or part of the speed limiting device 3 , the tensioning device 4 , the swing arm device 5 , and the guide shoe device 6 .

[0075] In some embodiments, detection components are installed on the speed limiting device 3 , the tensioning device 4 , the swing arm device 5 , and the guide shoe device 6 .

[0076] refer to Figure 1-3 , further, the speed limiting device 3 comprises:

[0077] A first shell 31, wherein the first shell 31 is fixedly mounted on the top of the elevator shaft;

[0078] A speed limiting wheel 32, wherein the speed limiting wheel 32 is rotatably mounted on the first housing 31, and the steel wire rope 2 is laid on the speed limiting wheel 32;

[0079] A brake wheel 33, wherein the brake wheel 33 is fixedly connected to the first housing 31 and is coaxially arranged with the speed limiting wheel 32;

[0080] A swing block 34, one end of which is rotatably mounted on the speed limiting wheel 32, and the other end of which is a free end, and a first sensing member 7 is fixedly mounted thereon; a limit pin 35 is fixedly mounted on the swing block 34; when the free end is moved away from the rotation axis of the speed limiting wheel 32 under the centrifugal force generated by the rotation of the speed limiting wheel 32, the limit pin 35 abuts against the brake wheel 33, thereby preventing the speed limiting wheel 32 and the wire rope 2 from moving;

[0081] a first elastic member 36, one end of which is fixedly connected to the speed limiting wheel 32, and the other end of which is fixedly connected to the swing block 34, and is used to drive the free end to move closer to the rotation axis of the speed limiting wheel 32 when the free end is away from the rotation axis of the speed limiting wheel 32;

[0082] The first detection component comprises:

[0083] A first sensor 8, wherein the detection direction of the first sensor 8 is parallel to the axis of the speed limiting wheel 32, and is used to detect the first sensing element 7 when the speed limiting wheel 32 rotates too fast;

[0084] The first processor 9 is mounted on the first housing 31 and is electrically connected to the first sensor 8 , and is used for issuing an alarm when the first sensor 8 detects the first sensing element 7 .

[0085] Specifically, when the speed limiting wheel 32 does not rotate, the first elastic member 36 drives the swing block 34 and the first sensing member 7 to be located close to the rotation axis.

[0086] Since a counterweight is installed at the free end of the swing block 34, when the speed limiting wheel 32 rotates faster, the counterweight will gradually move away from the rotation axis with the free end under the centrifugal effect. Then the first induction member 7 will also gradually move away from the rotation axis, and the trajectory of the first induction member 7 is in a spiral shape.

[0087] When the speed limiting wheel 32 rotates at a constant speed, the trajectory of the first induction member 7 is circular.

[0088] Furthermore, when the speed limiting wheel 32 rotates at a normal speed, the distance from the first sensing element 7 to the speed limiting wheel 32 is smaller than the distance from the first sensor 8 to the speed limiting wheel 32 ; therefore, the first sensing element 7 will pass through the first sensor 8 .

[0089] The first sensor 8 emits an infrared signal, and when it is reflected back to the first sensor 8 by the first sensing element 7, the first sensor 8 transmits the signal to the first processor 9, indicating that the speed limiter 3 rotates too fast, a fault has occurred, and an alarm is issued.

[0090] At this time, the swing block 34 and the speed limiting wheel 32 rotate relative to each other, and the limiting pin 35 installed on the swing block 34 and the brake wheel 33 abut against each other to limit the speed limiting wheel 32 to prevent the speed limiting wheel 32 from rotating.

[0091] Furthermore, the first detection component also includes:

[0092] A first distance sensor 10, which is fixedly mounted on the first housing 31 and has a detection direction perpendicular to the axis of the speed limiting wheel 32, and is used to detect the distance from the edge of the speed limiting wheel 32 to the first distance sensor 10;

[0093] The first time sensor 11, the first distance sensor 10 is fixedly mounted on the first housing 31, and the detection direction is toward the speed limiting wheel 32, and is used to cooperate with the first sensing element 7 to detect the rotation time of the speed limiting wheel 32;

[0094] The first processor 9 is electrically connected to the first distance sensor 10 and the first time sensor 11 , and is used to calculate the radius of the speed limiting wheel 32 according to the distance from the edge of the speed limiting wheel 32 to the first distance sensor 10 , and record the rotation time of the speed limiting wheel 32 .

[0095] Specifically, in order to record data during the fault process, a first distance sensor 10 and a first time sensor 11 are installed to respectively record the radius and rotation time of the speed limiting wheel 32 to facilitate maintenance by the staff.

[0096] The working process of the first distance sensor 10 is to detect the distance from the first distance sensor 10 to the edge of the speed limiting wheel 32. The first processor 9 knows the design distance from the first distance sensor 10 to the axis of the speed limiting wheel 32, and then subtracts the distance from the first distance sensor 10 to the edge of the speed limiting wheel 32 to calculate the radius of the speed limiting wheel 32.

[0097] The first time sensor 11 records the time when the speed limiting wheel 32 starts to rotate and stops rotating, and then the first processor 9 calculates the rotation time of the speed limiting wheel 32 .

[0098] refer to Figure 4-5 , further comprising:

[0099] A tensioning device 4, the tensioning device 4 is installed at the bottom of the elevator shaft, the steel wire rope 2 is overlapped on the tensioning device 4, and the tensioning device 4 is used to keep the steel wire rope 2 in a taut state;

[0100] A second detection component, the second detection component is installed on the tensioning device 4 and is used to detect whether the tensioning device 4 is faulty;

[0101] The tensioning device 4 comprises:

[0102] A second shell 41, which is fixedly mounted at the bottom of the elevator shaft; a sliding groove 42 is formed on the second shell 41 in a vertical direction;

[0103] A sliding block 43, wherein the sliding block 43 can be slidably installed in the sliding groove 42;

[0104] A tension wheel 44, the tension wheel 44 is rotatably connected to the sliding block 43; the steel wire rope 2 is mounted on the tension wheel 44; the sliding block 43 is fixedly mounted with a second induction member 12;

[0105] A second elastic member 45, one end of which is mounted on the second housing 41, and the other end of which is connected to the sliding block 43, and is used to drive the sliding block 43 to slide along the sliding groove 42, so that the steel wire rope 2 is in a taut state;

[0106] The second detection component comprises:

[0107] A second sensor assembly, which is fixedly mounted on the second housing 41 and has a detection direction toward the second sensing element 12; the second sensing element 12 is used to cooperate with the second sensor assembly to detect the position of the sliding block 43;

[0108] The second processor 13 is installed on the second housing 41 and is used to receive the position of the sliding block 43 detected by the second sensor assembly, and to issue an alarm when the sliding block 43 is not within the first set position range.

[0109] Specifically, in order to keep the steel wire rope 2 in a taut state without being over-tightened, a tensioning device 4 is provided, and the steel wire rope is laid on a tensioning wheel 44, the rotating shaft of the tensioning wheel 44 is rotatably connected to a sliding block 43, and the sliding block 43 is slidably mounted on a sliding groove 42 of the second shell 41.

[0110] When the steel wire rope 2 is slightly loosened, the second elastic member 45 releases part of its elastic force to drive the sliding block 43 to slide along the sliding groove 42, so that the steel wire rope 2 is tightened.

[0111] When the steel wire rope 2 is over-tightened, the steel wire rope 2 drives the tensioning wheel 44 and the sliding block 43 to move, compressing the second elastic member 45 , thereby relieving the tension of the steel wire rope 2 .

[0112] It can be seen that under normal working conditions, the second sensing element 12 on the sliding block 43 has a specific moving range. In this embodiment, the detection range of the second sensor assembly just covers the moving range of the second sensing element 12 under normal working conditions.

[0113] Specifically, if the second sensor assembly can detect the second sensing member 12, it means that the tensioning device 4 is in normal working condition; if the second sensing member 12 cannot be detected, it means that the sliding block 43 and the second sensing member 12 are out of the moving range, and it can be known that a fault has occurred. In this case, it is possible that the wire rope 2 is too loose and has exceeded the adjustment capacity of the second elastic member 45, or the wire rope 2 is too tight and broken.

[0114] If the second processor 13 cannot receive the signal that the second sensor assembly detects the second sensing element 12 , an alarm is immediately issued.

[0115] Furthermore, the second sensor assembly comprises:

[0116] A second sensor 14, wherein a plurality of second sensors 14 are provided and are arranged in sequence along a vertical direction and installed on the second housing 41;

[0117] The second sensor 14 which is the highest in the vertical direction is at the same height as the highest position of the sliding block 43 in the vertical direction when no failure occurs;

[0118] The second sensor 14 which is lower in the vertical direction is at the same height as the lowest position of the sliding block 43 in the vertical direction when no failure occurs;

[0119] When the sliding block 43 is in the first set position range, the detection direction of one of the second sensors 14 faces the second sensing element 12 ; when the plurality of first sensors 8 fail to detect the second sensing element 12 , it indicates that a fault occurs.

[0120] In this embodiment, a plurality of second sensors 14 are provided, which are evenly arranged in sequence along the vertical direction, with detection directions parallel to each other, and cover the movement range of the second sensing element 12 under normal working conditions.

[0121] In this arrangement, when the second sensing element 12 is within the normal movement range, it will always be detected by one of the second sensors 14. As long as one of the second sensors 14 can detect the second sensing element 12, the second processor 13 will not issue an alarm. When all the second sensors 14 cannot detect the second sensing element 12, the second processor 13 will issue an alarm.

[0122] The first set position range is the position range of the sliding block 43 when in a normal working state.

[0123] Furthermore, a fifth induction member 25 is fixedly mounted on the tension wheel 44;

[0124] The second detection component also includes:

[0125] The second distance sensor 15 is fixedly mounted on the second housing 41, and the detection direction of the second distance sensor 15 is perpendicular to the axis of the tensioning wheel 44, and is used to cooperate with the fifth sensing element 25 to detect the distance from the edge of the tensioning wheel 44 to the second distance sensor 15;

[0126] The second time sensor 16 is fixedly mounted on the second housing 41 and has a detection direction toward the tensioning wheel 44 , and is used to cooperate with the fifth sensing element 25 to detect the rotation time of the tensioning wheel 44 ;

[0127] The second processor 13 is electrically connected to the second distance sensor 15 and the second time sensor 16 , and is used to calculate the radius of the tensioning wheel 44 according to the distance from the edge of the tensioning wheel 44 to the second distance sensor 15 , and record the rotation time of the tensioning wheel 44 .

[0128] Specifically, in order to measure the radius of the tension wheel 44 and the rotation time of the tension wheel 44, a second distance sensor 15 and a second time sensor 16 are additionally installed.

[0129] The working process of the second distance sensor 15 is to detect the distance from the second distance sensor 15 to the edge of the tension wheel 44. The second processor 13 knows the design distance from the second distance sensor 15 to the axis of the tension wheel 44, and then subtracts the distance from the second distance sensor 15 to the edge of the tension wheel 44 to calculate the radius of the tension wheel 44.

[0130] The second time sensor 16 records the time when the tension wheel 44 starts to rotate and stops rotating, and then the second processor 13 calculates the rotation time of the tension wheel 44.

[0131] refer to Figure 6-7 , further comprising:

[0132] A swing arm device 5, wherein the swing arm device 5 is installed on the elevator car, the steel wire rope 2 is overlapped on the swing arm device 5, and the elevator guide rail 1 can be slidably clamped in the swing arm device 5 to maintain the balance of the elevator car; the swing arm device 5 is used to limit the elevator car under the action of the steel wire rope 2 when the elevator car falls;

[0133] A third detection component, the third detection component is installed on the swing arm device 5, and is used to detect whether the swing arm device 5 is faulty;

[0134] The swing arm device 5 comprises:

[0135] A connecting block 51, one side of which is fixedly mounted on the elevator car, and the other side of which is clamped on the elevator guide rail 1 and can slide relative to the elevator guide rail 1; a third induction member 17 is fixedly mounted on the connecting block 51;

[0136] A third housing 52, wherein the third housing 52 is rotatably mounted on the connecting block 51;

[0137] A swing arm wheel 53, wherein the swing arm wheel 53 is rotatably mounted on the third housing 52, and the steel wire rope 2 is laid on the swing arm wheel 53;

[0138] The third detection component comprises:

[0139] A third sensor assembly, the third sensor assembly is fixedly mounted on the third housing 52, and the detection direction is toward the third sensing element 17; the third sensing element 17 is used to cooperate with the third sensor assembly to detect whether the swing arm wheel 53 is in the second set position range;

[0140] The third processor 18 is mounted on the third housing 52 and is electrically connected to the third sensor assembly, and is used for issuing an alarm when the third sensor assembly cannot detect the third sensing element 17 .

[0141] Specifically, when the wire rope 2 is slightly loosened or tightened, the third housing 52 will be driven to rotate relative to the connecting block 51 through the swing arm wheel 53, so that the height of the swing arm wheel 53 is slightly higher or slightly lower than the connecting block 51.

[0142] The rotation axis of the third housing 52 and the connecting block 51 serves as the swing arm shaft 26. When working normally, the vertical line from the center of the swing arm wheel 53 to the swing arm shaft 26 is parallel to the horizontal direction. When the wire rope 2 is slightly loose or tight, the vertical line will have a small angle with the horizontal direction, which is called the normal angle range. When a fault occurs, the angle will exceed the normal angle range.

[0143] In this embodiment, the third sensor assembly is fixedly mounted on the third housing 52, and its detection range just covers the normal angle range.

[0144] When the third sensor assembly cannot detect the third sensing element 17, it means that the angle exceeds the normal angle range and a fault occurs. When the third sensor assembly can detect the third sensing element 17, it means that the angle is within the normal angle range and no fault occurs.

[0145] When the third processor 18 cannot receive the signal from the third sensor group detecting the third sensing element 17 , an alarm is issued.

[0146] Furthermore, the third sensor assembly comprises:

[0147] A third sensor 19, wherein a plurality of third sensors 19 are provided and are arranged in sequence along a vertical direction and mounted on the third housing 52;

[0148] When no fault occurs and the swing arm wheel 53 is at the highest position in the vertical direction, the detection direction of the third sensor 19 at the lowest position in the vertical direction faces the third sensing element 17;

[0149] When no fault occurs and the swing arm wheel 53 is at the lowest position in the vertical direction, the detection direction of the third sensor 19 at the highest position in the vertical direction faces the third sensing element 17;

[0150] When the swing arm wheel 53 is in the second set position, the detection direction of one of the third sensors 19 faces the third sensing element 17; when multiple third sensors 19 fail to detect the third sensing element 17, it indicates that a fault occurs.

[0151] In this embodiment, the plurality of third sensors 19 are evenly arranged in sequence along the vertical direction.

[0152] When the third housing 52 and the swing arm wheel 53 are at the highest position under normal conditions, the center of the swing arm wheel 53 is higher than the swing arm shaft 26. Since the third sensing element 17 is between the third sensor 19 and the swing arm shaft 26, the detection direction of the third sensor 19 at the lowest position is directly facing the third sensing element 17.

[0153] When the third housing 52 and the swing arm wheel 53 are at the lowest position under normal circumstances, the center of the swing arm wheel 53 is lower than the swing arm shaft 26. At this time, the detection direction of the third sensor 19 at the highest point is directly facing the third sensing element 17.

[0154] As long as one of the third sensors 19 can detect the third sensing element 17, it indicates that it is in a normal working state. When all the third sensors 19 cannot detect the third sensing element 17, it indicates that a fault has occurred, and the third processor 18 issues an alarm.

[0155] The second set position range includes all positions where the swing arm wheel 53 is in a normal working state.

[0156] Furthermore, a fourth induction member 20 is fixedly mounted on the swing arm wheel 53;

[0157] The third detection component also includes:

[0158] A third distance sensor 21, which is fixedly mounted on the third housing 52, and has a detection direction perpendicular to the axis of the swing arm wheel 53, and is used in conjunction with the fourth sensing element 20 to detect the distance from the edge of the swing arm wheel 53 to the third distance sensor 21;

[0159] The third time sensor 22, the third distance sensor 21 is fixedly mounted on the third housing 52, and the detection direction is toward the swing arm wheel 53, and is used to cooperate with the fourth sensing element 20 to detect the rotation time of the swing arm wheel 53;

[0160] The third processor 18 is electrically connected to the third distance sensor 21 and the third time sensor 22 , and is used to calculate the radius of the swing arm wheel 53 according to the distance from the edge of the swing arm wheel 53 to the third distance sensor 21 , and record the rotation time of the swing arm wheel 53 .

[0161] Specifically, the working process of the third distance sensor 21 is to detect the distance from the third distance sensor 21 to the edge of the swing arm wheel 53. The third processor 18 knows the design distance from the third distance sensor 21 to the axis of the swing arm wheel 53, and then subtracts the distance from the third distance sensor 21 to the edge of the swing arm wheel 53 to calculate the radius of the swing arm wheel 53.

[0162] The third time sensor 22 records the time when the swing arm wheel 53 starts to rotate and stops rotating, and then the third processor 18 calculates the rotation time of the swing arm wheel 53.

[0163] refer to Figure 8 , further comprising:

[0164] A guide shoe device 6, wherein the guide shoe device 6 is fixedly mounted on the elevator car; the elevator guide rail 1 can be slidably mounted in the guide shoe device 6; the guide shoe device 6 is used to guide the elevator car;

[0165] a fourth detection component, the fourth detection component being mounted on the guide shoe device 6 and being used for detecting whether the guide shoe device 6 is faulty;

[0166] The guide shoe device 6 comprises:

[0167] A bracket 61, wherein the bracket 61 is fixedly mounted on the elevator car;

[0168] A guide shoe wheel 62, wherein a plurality of guide shoe wheels 62 are provided and all of them can be rotatably mounted on the bracket 61; the circumferential side walls of the plurality of guide shoe wheels 62 are respectively in contact with different surfaces of the elevator guide rail 1;

[0169] The fourth detection component comprises:

[0170] A fourth sensor 23, wherein a plurality of the fourth sensors 23 are provided and are fixedly mounted on the bracket 61; the detection directions of the plurality of fourth sensors 23 are respectively oriented toward the centers of different guide shoe wheels 62 and are coplanar with the corresponding guide shoe wheels 62, and are used to detect the distance from the edge of the guide shoe wheel 62 to the fourth sensor 23;

[0171] The fourth processor 24 is installed on the bracket 61 and is electrically connected to the plurality of fourth sensors 23, and is used for calculating the radius of the guide shoe wheel 62 according to the distance from the edge of the guide shoe wheel 62 to the fourth sensor 23; and issuing an alarm when the radius of the guide shoe wheel 62 is not within the set range.

[0172] Specifically, the fourth sensor 23 is a laser displacement sensor, and its detection direction is toward the center of the guide shoe wheel 62. The fourth processor 24 knows the design distance from the fourth sensor 23 to the center of the guide shoe wheel 62. When the fourth sensor 23 detects the distance from the guide shoe wheel 62 to the fourth sensor 23, the fourth processor 24 can calculate the current radius of the guide shoe wheel 62.

[0173] Detecting the current radius of the guide shoe wheel 62 can determine the wear of the guide shoe wheel 62. When the radius of the guide shoe wheel 62 is within the set range, it can work normally. When the radius of the guide shoe wheel 62 is not within the set range, it indicates that a fault has occurred, and the fourth processor 24 issues an alarm.

[0174] The setting range is [Rd, R+d], R represents the design radius of the guide shoe wheel 62, and d represents the allowable error value.

[0175] The above description is only a preferred embodiment of the utility model and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the utility model is not limited to the technical solution formed by a specific combination of the above technical features, but also should cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the utility model (but not limited to) to form a technical solution.

Claims

1. An elevator safety device installed in an elevator shaft for limiting the position of an elevator car in the event of a fault, wherein an elevator guide rail (1) is also installed in the elevator shaft, characterized in that: include: A steel wire rope (2) connected to the elevator car and used to drive the elevator car to move under the action of an external force; A speed limiting device (3), the speed limiting device (3) being installed at the top of the elevator shaft, the steel wire rope (2) being overlapped on the speed limiting device (3); the speed limiting device (3) being used to prevent the steel wire rope (2) from moving when the elevator car falls; A tensioning device (4), the tensioning device (4) being installed at the bottom of the elevator shaft, the steel wire rope (2) being overlapped on the tensioning device (4), and the tensioning device (4) being used to put the steel wire rope (2) in a tensioned state; A swing arm device (5), the swing arm device (5) being mounted on the elevator car, the steel wire rope (2) being overlapped on the swing arm device (5), and the elevator guide rail (1) being slidably mounted in the swing arm device (5) for maintaining the balance of the elevator car; the swing arm device (5) is used to limit the position of the elevator car under the action of the steel wire rope (2) when the elevator car falls; A first detection component, the first detection component is installed on the speed limiting device (3) and is used to detect whether the speed limiting device (3) is faulty; a second detection component, the second detection component being mounted on the tensioning device (4) and being used to detect whether the tensioning device (4) is faulty; A third detection component, the third detection component is mounted on the swing arm device (5) and is used to detect whether the swing arm device (5) has a fault.

2. An elevator safety device according to claim 1, characterized in that: The speed limiting device (3) comprises: A first shell (31), the first shell (31) being fixedly mounted on the top of the elevator shaft; A speed limiting wheel (32), the speed limiting wheel (32) being rotatably mounted on the first housing (31), and the steel wire rope (2) being laid on the speed limiting wheel (32); a brake wheel (33), the brake wheel (33) being fixedly connected to the first housing (31) and being coaxially arranged with the speed limiting wheel (32); a swing block (34), one end of which is rotatably mounted on the speed limiting wheel (32), and the other end of which is a free end and fixedly mounted with a first sensing element (7); a limit pin (35) is fixedly mounted on the swing block (34); when the free end moves away from the rotation axis of the speed limiting wheel (32) under the centrifugal force generated by the rotation of the speed limiting wheel (32), the limit pin (35) abuts against the brake wheel (33), thereby preventing the speed limiting wheel (32) and the steel wire rope (2) from moving; A first elastic member (36), one end of the first elastic member (36) being fixedly connected to the speed limiting wheel (32), and the other end of the first elastic member (36) being fixedly connected to the swing block (34), and being used for driving the free end to move closer to the rotation axis of the speed limiting wheel (32) when the free end moves away from the rotation axis of the speed limiting wheel (32).

3. An elevator safety device according to claim 2, characterized in that: The first detection component comprises: A first sensor (8), wherein the detection direction of the first sensor (8) is parallel to the axis of the speed limiting wheel (32), and is used to detect the first sensing element (7) when the speed limiting wheel (32) rotates too fast; A first processor (9), the first processor (9) being mounted on the first housing (31) and electrically connected to the first sensor (8), and being used to issue an alarm when the first sensor (8) detects the first sensing element (7).

4. An elevator safety device according to claim 3, characterized in that: The tensioning device (4) comprises: A second shell (41), the second shell (41) being fixedly mounted at the bottom of the elevator shaft; a sliding groove (42) is provided on the second shell (41) in a vertical direction; A sliding block (43), the sliding block (43) being slidably mounted in the sliding groove (42); A tension wheel (44), the tension wheel (44) being rotatably connected to the sliding block (43); the steel wire rope (2) being mounted on the tension wheel (44); and a second sensing element (12) being fixedly mounted on the sliding block (43); A second elastic member (45), one end of the second elastic member (45) is mounted on the second housing (41), and the other end is connected to the sliding block (43), and is used to drive the sliding block (43) to slide along the sliding groove (42), so that the steel wire rope (2) is in a taut state.

5. An elevator safety device according to claim 4, characterized in that: The second detection component comprises: A second sensor assembly, the second sensor assembly being fixedly mounted on the second housing (41) with a detection direction toward the second sensing element (12); the second sensing element (12) being used in cooperation with the second sensor assembly to detect the position of the sliding block (43); A second processor (13), the second processor (13) is mounted on the second housing (41), and is used to receive the position of the sliding block (43) detected by the second sensor assembly, and to issue an alarm when the sliding block (43) is not within a first set position range.

6. An elevator safety device according to claim 5, characterized in that: The second sensor assembly comprises: A second sensor (14), wherein a plurality of the second sensors (14) are provided and are arranged in sequence along a vertical direction and mounted on the second housing (41); The second sensor (14) which is the highest in the vertical direction is at the same height as the highest position of the sliding block (43) in the vertical direction when no fault occurs; The second sensor (14) which is lower in the vertical direction is at the same height as the lowest position of the sliding block (43) in the vertical direction when no fault occurs; When the sliding block (43) is in a first set position range, the detection direction of one of the second sensors (14) faces the second sensing element (12); when multiple first sensors (8) fail to detect the second sensing element (12), it indicates that a fault has occurred.

7. An elevator safety device according to claim 1, characterized in that: The swing arm device (5) comprises: A connecting block (51), one side of the connecting block (51) being fixedly mounted on the elevator car, and the other side of the connecting block (51) being clamped on the elevator guide rail (1) and being able to slide relative to the elevator guide rail (1); a third sensing element (17) being fixedly mounted on the connecting block (51); a third housing (52), the third housing (52) being rotatably mounted on the connecting block (51); A swing arm wheel (53), the swing arm wheel (53) is rotatably mounted on the third housing (52), and the steel wire rope (2) is laid on the swing arm wheel (53).

8. An elevator safety device according to claim 7, characterized in that: The third detection component comprises: a third sensor assembly, the third sensor assembly being fixedly mounted on the third housing (52) and having a detection direction facing the third sensing element (17); the third sensing element (17) being used in conjunction with the third sensor assembly to detect whether the swing arm wheel (53) is in a second set position range; A third processor (18), the third processor (18) being mounted on the third housing (52) and electrically connected to the third sensor assembly, and being used to issue an alarm when the third sensor assembly cannot detect the third sensing element (17).

9. An elevator safety device according to claim 8, characterized in that: The third sensor assembly comprises: A third sensor (19), wherein a plurality of the third sensors (19) are provided and are arranged in sequence along a vertical direction and mounted on the third housing (52); When no fault occurs and the swing arm wheel (53) is at the highest position in the vertical direction, the detection direction of the third sensor (19) at the lowest position in the vertical direction faces the third sensing element (17); When no fault occurs and the swing arm wheel (53) is at the lowest position in the vertical direction, the detection direction of the third sensor (19) at the highest position in the vertical direction faces the third sensing element (17); When the swing arm wheel (53) is in the second set position, one of the third sensors (19) has a detection direction facing the third sensing element (17); when multiple third sensors (19) fail to detect the third sensing element (17), it indicates that a fault has occurred.

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