Elevator system and elevator buffer judgment method

Abstract

This application relates to an elevator system and an elevator buffer judgment method. The elevator system described in this application includes: a car, a counterweight, a storage unit, an oil pressure control component, a car buffer, and a counterweight buffer. The car buffer is placed below the car, the counterweight buffer is placed below the counterweight, and the car and the counterweight are connected by a rope; the storage unit is used to store the upper limit position and the lower limit position of the car buffer, and to store the upper limit position and the lower limit position of the counterweight buffer; the oil pressure control component is connected to the car buffer and the counterweight buffer respectively through pipelines, and when the car buffer is in the stroke between the upper limit position and the lower limit position, oil is injected into the car buffer. The elevator system and the elevator buffer judgment method described in this application have the advantages of convenience and accuracy.

Description

Technical Field

[0001] This application relates to elevators, and in particular to elevator systems and elevator buffer judgment methods. Background Art

[0002] Elevator buffers are safety components of elevators. As the last protection line for elevator overshoot or undershoot, they play a very important protective role. The existing elevator buffer action is achieved through buffers. Buffers are installed in the hoistway, and detection switches are installed on the buffers. By pressing the detection switch downward, it is judged whether a heavy object is approaching. In the prior art, buffers are set in the hoistways on the car side and the counterweight side, and detection switches are set on all the buffers. When the elevator car descends and presses the detection switch on the corresponding buffer, it means that the elevator is at the bottom of the hoistway at this time and needs buffering; or when the counterweight descends and presses the detection switch on the corresponding buffer, it means that the car is at the top of the hoistway at this time and needs buffering. Therefore, whether it is the car side or the counterweight side, the buffering of the elevator car in the prior art is achieved by pressing the detection switch. And the circuit of the detection switch is connected in series in the safety circuit of the elevator. When the detection switch acts, the drive system of the elevator stops outputting. Once the detection switch acts, the entire safety circuit will be disconnected, making it impossible to accurately judge the cause of the fault. Summary of the Invention

[0003] Based on this, the purpose of this application is to provide an elevator system and an elevator buffer judgment method, which have the advantages of separating the buffering of the elevator from the action of the safety circuit, so as to quickly judge the buffer failure and better ensure the safe operation of the elevator.

[0004] On the one hand, this application provides an elevator system, including a car, a counterweight, a storage unit, an oil pressure control component, a car buffer and a counterweight buffer. The car buffer is placed below the car, the counterweight buffer is placed below the counterweight, and the car and the counterweight are connected by ropes; the storage unit is used to store the upper limit position and the lower limit position of the car buffer when ascending, and store the upper limit position and the lower limit position of the counterweight buffer when ascending.

[0005] The oil pressure control component is connected to the car buffer and the counterweight buffer respectively through pipelines. When the car buffer is in the stroke between the upper limit position and the lower limit position, oil is injected into the car buffer; when the counterweight buffer is in the stroke between the upper limit position and the lower limit position, oil is injected into the counterweight buffer.

[0006] The elevator system described in this application records the upper limit position and the lower limit position of the car. Thus, when the bottom surface of the car is between these two limit positions, the oil pressure control component can inject oil into the car buffer, and the injection volume is determined according to the position of the bottom of the car, so as to ensure the buffering effect when the car falls and play a good protective role. At the same time, by recording the upper limit position and the lower limit position of the counterweight, when the bottom surface of the counterweight is between these two limit positions, the oil pressure control component can inject oil into the counterweight buffer, and the injection volume is determined according to the position of the bottom of the counterweight, so as to ensure the buffering effect when the car rises and play a good protective role for the car.

[0007] Further, it also includes a driving device, which is connected to the ropes connected to the car and the counterweight to drive the height change of the car and the counterweight. By driving the ropes to rotate through the driving device, the height of the car and the counterweight can be adjusted.

[0008] Further, it also includes a controller, and the oil pressure control component, the car buffer, the counterweight buffer, the driving device and the storage unit are respectively electrically connected to this controller. By electrically connecting the oil pressure control component, the car buffer, the counterweight buffer, the driving device and the storage unit to this controller, the automatic control of the oil pressure control component by the controller can be realized to automatically adjust the oil pressure of the car buffer or the oil pressure of the counterweight buffer; the determination of the upper limit position and the lower limit position of the car buffer by the controller can be realized, as well as the determination of being between the two limit positions; the determination of the upper limit position and the lower limit position of the counterweight buffer by the controller can be realized, as well as the determination of being between the two limit positions; the automatic control of the driving device by the controller can be realized to realize the automatic control of the car height; the reading and writing of the data in the storage unit by the controller can also be realized, thus ensuring the safe operation of the elevator.

[0009] Further, it also includes a coding tape and a position sensing component. The position sensing component emits a signal and is reflected by the coding tape to determine the absolute position of the car; the coding tape is longitudinally arranged, and multiple groups of codes are continuously arranged longitudinally on the coding tape; the position sensing component includes multiple photoelectric switches, and the multiple photoelectric switches are longitudinally arranged to detect the codes at the corresponding positions of the car. By setting the coding tape and the position sensing component, the absolute position of the car can be judged. The codes on the coding tape are detected by the photoelectric switches, and the number of photoelectric switches is the same as the number of corresponding codes. One recognition is a group, and the codes are multiple groups and are cyclic codes. Each time the photoelectric switch moves a unit distance, the corresponding code group is different. In this way, the code group at the corresponding height can be read by the photoelectric switch, and each group of codes corresponds to an absolute position, so that the absolute position of the car can be judged.

[0010] Further, the encoding includes punched codes and non-punched codes. Each group of the punched codes and the non-punched codes are arranged in sequence according to rules, and the number of the encoding in each group is consistent with the number of the photoelectric switches set. The punched code indicates that a hole is set at the corresponding height of the encoding tape, and the hole can be a round hole or a square hole; the non-punched code indicates that no hole is set at the corresponding height of the encoding tape. In each group of encodings, only the punched code can be set, or only the non-punched code can be set, and a combination of the punched code and the non-punched code is also set to achieve cyclic encoding.

[0011] Further, an acceleration sensor is further included. The acceleration sensor is arranged on the car and is electrically connected to the controller. By arranging the acceleration sensor, the acceleration of the car is measured, and the acceleration value is matched with the absolute position of the car to determine whether the acceleration corresponding to the height of the car matches. If not, it will be fed back to the controller and adjusted to ensure the action of the corresponding buffer, thereby ensuring the stability of the car.

[0012] On the one hand, the present application also provides an elevator buffer judgment method, including the steps of:

[0013] Recording the upper limit position and the lower limit position of the car buffer, and recording the upper limit position and the lower limit position of the counterweight buffer;

[0014] Setting the oil injection starting position of the car buffer and setting the oil injection starting position of the counterweight buffer;

[0015] When the bottom surface of the car is between its oil injection starting position and the lower limit position, hydraulic oil is injected into the car buffer; when the bottom surface of the counterweight block is between its oil injection starting position and the lower limit position, hydraulic oil is injected into the counterweight buffer.

[0016] In the elevator buffer judgment method of the present application, when it is detected that the bottom of the elevator car descends and touches the upper limit position of the car buffer, a signal is triggered and preparation is made to inject hydraulic oil into the car buffer. When the car continues to descend to the oil injection starting position of the car buffer, hydraulic oil is injected into the car buffer through the oil pressure control component, and as the car continues to descend, hydraulic oil with an oil pressure matching the stroke is injected. Thus, when the car descends, sufficient buffering effect is ensured to ensure the safety of the car. In addition, for the counterweight block side, the same method is adopted to ensure that when the counterweight block descends, sufficient buffering effect is achieved, thereby ensuring the safety of the car. The elevator buffer judgment method of the present application eliminates the setting of detection switches, and when the elevator buffers, the safety electrical circuit of the elevator operates normally without being affected by the elevator buffer, ensuring the safety of the elevator system; and it also facilitates the troubleshooting of the electrical circuit.

[0017] Further, a coding tape is provided in the hoistway, and a position sensing component is provided on the car. A plurality of coding combinations are longitudinally arranged on the coding tape in a cyclic coding manner; the position sensing component includes a plurality of photoelectric switches, and the plurality of photoelectric switches are longitudinally arranged in sequence, and the plurality of photoelectric switches are used to identify the corresponding codes of the coding combinations to determine the absolute position of the car;

[0018] When the car approaches the upper limit position of the car buffer during upward movement, oil injection into the car buffer is prepared.

[0019] Further, continuous coding is performed on the coding tape so that a new coding serial number is obtained when the car moves a displacement of one detection unit.

[0020] Further, the acceleration of the car is detected. When the car approaches or reaches its corresponding upper limit position, the car buffer is prepared for oil injection.

[0021] For better understanding and implementation, the present application will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of an exemplary elevator system of the present application;

[0023] Figure 2 is a partial structural schematic diagram of an exemplary coding tape of the present application. Detailed Embodiments

[0024] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0025] Figure 1 is a schematic structural diagram of an exemplary elevator system of the present application. Please refer to Figure 1, An exemplary elevator system of the present application includes a car 11, a counterweight 21, a storage unit 61, an oil pressure control component (not shown in the figure), a car buffer 12, and a counterweight buffer 22. The car buffer 12 is placed below the car 11, and the counterweight buffer 22 is placed below the counterweight 21. The car 11 and the counterweight 21 are connected by a rope; the storage unit 61 is used to store the upper limit position and the lower limit position of the car buffer 12, and to store the upper limit position and the lower limit position of the counterweight buffer 22; the oil pressure control component is connected to the car buffer 12 and the counterweight buffer 22 respectively through pipelines. When the car buffer 12 is in the stroke between the upper limit position and the lower limit position, oil is injected into the car buffer 12; when the counterweight buffer 22 is in the stroke between the upper limit position and the lower limit position, oil is injected into the counterweight buffer 22.

[0026] In some preferred embodiments, a driving device 30 is further included. The driving device 30 is connected to the ropes connecting the car 11 and the counterweight 21 to drive the height change of the car 11 and the counterweight 21.

[0027] In some preferred embodiments, a controller 62 is further included. The oil pressure control component, the car buffer 12, the counterweight buffer 22, the driving device 30, and the storage unit 61 are respectively electrically connected to the controller 62.

[0028] In some preferred embodiments, a coding tape 50 and a position sensing component 41 are further included. The position sensing component 41 emits a signal and is reflected by the coding tape 50 to determine the absolute position of the car 11; the coding tape 50 is longitudinally arranged, and multiple groups of codes are continuously arranged longitudinally on the coding tape 50; the position sensing component 41 includes multiple photoelectric switches, and the multiple photoelectric switches are longitudinally arranged to detect the codes at the corresponding positions of the car 11.

[0029] Figure 2 It is a partial structural schematic diagram of the coding tape 50 exemplary of the present application. Combining Figure 2 , In some preferred embodiments, the code includes an open hole code M1 and a non-open hole code M0. Each group of the open hole code M1 and the non-open hole code M0 are arranged in sequence according to a rule, and the number of codes in each group is the same as the number of photoelectric switches set.

[0030] In some preferred embodiments, an acceleration sensor 42 is further included. The acceleration sensor 42 is arranged on the car 11 and is electrically connected to the controller 62.

[0031] An exemplary elevator buffer judgment method of the present application includes the steps:

[0032] S10. Record the upper limit position and the lower limit position of the car buffer 12, and record the upper limit position and the lower limit position of the counterweight buffer 22;

[0033] S20. Set the starting position for injecting oil into the car buffer, and set the starting position for injecting oil into the counterweight buffer;

[0034] S30. When the bottom surface of the car 11 is between its starting position for injecting oil and its lower limit position, inject hydraulic oil into the car buffer 12; when the bottom surface of the counterweight block 21 is between its starting position for injecting oil and its lower limit position, inject hydraulic oil into the counterweight buffer 22.

[0035] In some preferred embodiments, before step S30, it further includes step S21. Set an encoded tape 50 in the hoistway, and set a position sensing assembly 41 on the car 11. Longitudinally set a plurality of encoded combinations on the encoded tape 50 in a cyclic encoding manner; the position sensing assembly 41 includes a plurality of photoelectric switches, the plurality of photoelectric switches are arranged longitudinally in sequence, and the plurality of photoelectric switches are used to identify the corresponding codes of the encoded combinations to determine the absolute position of the car 11; when the car 11 approaches the upper limit position of the car buffer 12, prepare to inject oil into the car buffer 12.

[0036] In some preferred embodiments, in step S21, continuous encoding is performed on the encoded tape 50 such that each time the car 11 moves a displacement of one detection unit, a new encoded serial number is obtained.

[0037] In some preferred embodiments, before step S30, it further includes step S22. Detect the acceleration of the car 11. When the car 11 approaches or reaches its corresponding upper limit position, the car buffer 12 is ready for oil injection.

[0038] In some preferred embodiments, the coding tape 50 adopts a cyclic coding method, and a plurality of codes are arranged longitudinally in sequence. These codes include the perforated code M1 (which can be understood as perforations on the coding tape 50), and also include the non-perforated code M0 (which can be understood as no perforations on the coding tape 50), and the interval between every two adjacent codes is equidistant. In this embodiment, it includes a code reading component and a decoding component. The code reading component includes a plurality of photoelectric switches, and the decoding component includes a decoder (not shown in the figure). In some embodiments, the decoder is arranged in the controller. The photoelectric switches are used to detect the codes on the coding tape 50. The decoder is connected to the photoelectric switches and interprets the corresponding code signals, so as to obtain the absolute position of the corresponding car 11. For example, in one embodiment, every ten codes are in a group, and ten photoelectric switches are correspondingly arranged. The distance between any two adjacent ones of these photoelectric switches is the same, and this distance is the same as the code interval on the coding tape 50. When the optical signal emitted by the photoelectric switch is reflected by the reflector arranged in the perforated code M1 back into the photoelectric switch, the photoelectric switch receives the reflected signal, and thus the signal of this photoelectric switch is set to 1. When the optical signal emitted by the photoelectric switch irradiates to the non-perforated code M0, the signal obtained by the photoelectric switch at this time is 0. The ten photoelectric switches respectively detect a group (ten) of codes, so as to obtain the corresponding ten code values. Combining Figure 2 with the example of, the codes in this part are 0111011011 from top to bottom. In addition, the coding tape 50 adopts cyclic coding. For example, in a form of a coding tape 50, it is 00000000001101001...101111111111 from top to bottom. Then, the first group of codes is 0000000000, so there are ten non-perforated code M0 positions corresponding to this position on the coding tape 50, and there are no perforations at these positions. For the next group of codes, in fact, the code reading component only needs to move one code position. The second group of codes is 0000000001, and the tenth position corresponding to the second group is the perforated code M1, and the other nine are non-perforated code M0; the third group of codes is 0000000011, and so on.

[0039] In the above embodiments, ten optoelectronic switches are adopted to form a 210-bit coding strip 50, that is, a 1024-bit coding. These codings are arranged by cyclic coding, and during the arrangement, duplicate checking and sorting are performed through a computer program to ensure that each group of codings is a unique solution. Cyclic coding is a non-linear coding. Adopting cyclic coding can effectively solve the convenience of code reading and decoding in this application. In this embodiment, the distance between every two adjacent codings is 1 cm, then the total length of the entire coding strip 50 can reach at least 10.24 m, which is sufficient for a relatively long elevator hoistway. Of course, nine optoelectronic switches can also be set. In the case where the distance is 1 cm, the length of a single coding strip 50 can reach at least 6.12 m. It can be understood that in this embodiment, the detection accuracy of the code reader is 1 cm. That is, every time the height of the car 11 changes by 1 cm, a new group of codings will be read out, and this group of codings will correspond to an absolute position of the car 11.

[0040] Through the above method, the absolute position of the car 11 is determined. And an upper coding strip 50 can be set at the top of the hoistway, and at the same time a lower coding strip 50 can be set at the bottom of the hoistway. Thus, when the car 11 ascends to the top of the hoistway, the absolute position of the car 11 can be determined through the upper coding strip 50; when the car 11 descends to the bottom of the hoistway, the absolute position of the car 11 can be determined through the lower coding strip 50.

[0041] Combined with the above method for judging the absolute position of the car 11, when the car 11 does not touch the car buffer 12, or when the counterweight 21 does not touch the counterweight buffer 22, the situation of the car 11 can be predicted in advance and the oil injection preparation can be made. For example, when it is detected that the distance between the car 11 and the car buffer 12 is 1 m, the car buffer 12 enters the state of preparing for oil injection. If the car 11 continues to descend, then combined with whether the car 11 presses the car buffer 12, it is comprehensively determined whether the car 11 is located at the starting position of the car buffer oil injection. If the data of both match, it indicates that the information that the car 11 is located at this starting position of oil injection is accurate, and the car buffer 12 is oiled to ensure the safety of the car 11. Setting the coding strip 50, the code reading component and the decoding component can accurately judge the absolute position of the car 11 and prepare for oiling the car 11, so as to ensure the accuracy of oil injection of the car buffer 12 when the car 11 is abnormal, and further ensure the safety of the car 11.

[0042] The above-described embodiments only represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several deformations and improvements can still be made, and these all belong to the protection scope of this application.

Claims

1. An elevator buffer judgment method, characterized in that, Including the steps: S10. Record the upper limit position and the lower limit position of the car buffer, and record the upper limit position and the lower limit position of the counterweight buffer; S20. Set the oil injection starting position of the car buffer, and set the oil injection starting position of the counterweight buffer; S30. When the bottom surface of the car is between its oil injection starting position and the lower limit position, inject hydraulic oil into the car buffer; when the bottom surface of the counterweight is between its oil injection starting position and the lower limit position, inject hydraulic oil into the counterweight buffer; Provide an elevator system, which includes a car, a counterweight, a storage unit, an oil pressure control component, a car buffer and a counterweight buffer. The car buffer is placed under the car, the counterweight buffer is placed under the counterweight, and the car and the counterweight are connected by ropes; the storage unit is used to store the upper limit position and the lower limit position of the car buffer, and store the upper limit position and the lower limit position of the counterweight buffer; The oil pressure control component is respectively connected with the car buffer and the counterweight buffer through pipelines; Before step S30, it further includes step S21. Set an encoding tape in the hoistway, and set a position sensing component on the car. A plurality of encoding combinations are longitudinally set on the encoding tape in a cyclic encoding manner; the position sensing component includes a plurality of photoelectric switches, and the plurality of photoelectric switches are longitudinally arranged in sequence, and the plurality of photoelectric switches are used to identify the corresponding encoding of the encoding combination to determine the absolute position of the car; when the car approaches the upper limit position of the car buffer, prepare to inject oil into the car buffer; In step S21, perform continuous encoding on the encoding tape so that when the car moves a displacement of one detection unit, a new encoding serial number is obtained; Before step S30, it further includes step S22. Detect the acceleration of the car. When the car approaches or reaches its corresponding upper limit position, the car buffer is ready for oil injection.

2. The elevator buffer judgment method according to claim 1, wherein: It further includes a driving device, which is connected to the ropes connecting the car and the counterweight to drive the height change of the car and the counterweight.

3. The elevator buffer judgment method according to claim 2, wherein: It further includes a controller, and the oil pressure control component, the car buffer, the counterweight buffer, the driving device and the storage unit are respectively electrically connected to the controller.

4. The elevator buffer judgment method according to claim 3, characterized in that: It further includes an encoding tape and a position sensing component. The position sensing component emits a signal and is reflected by the encoding tape to determine the absolute position of the car; The encoding tape is longitudinally arranged, and multiple groups of encodings are longitudinally and continuously arranged on the encoding tape; The position sensing component includes a plurality of photoelectric switches, and the plurality of photoelectric switches are longitudinally arranged to detect the encoding at the corresponding position of the car.

5. The elevator buffer judgment method according to claim 4, characterized in that: The encoding includes an open hole code and a non-open hole code. Each group of the open hole code and the non-open hole code are arranged in sequence according to rules, and the number of the encoding in each group is the same as the number of the photoelectric switches set.

6. The elevator buffer judgment method according to claim 5, wherein: It further includes an acceleration sensor, which is arranged on the car and is electrically connected to the controller.

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