Elevator guide rail dynamic detection system

Abstract

The present invention discloses a dynamic detection system for elevator guide rails, which includes: an elevator car; a guide rail assembly, which is spliced ​​by multiple groups of equal-length steel rails; guide shoes, which are symmetrically installed on the outer wall of the elevator car and correspond to the guide rail assembly, and are used to cooperate with the guide rail assembly to limit the elevator car moving up and down; a distance measuring device, which is installed on the top of the elevator car, and is used to measure the distance from the top of the elevator car to the top of the shaft in real time during the movement of the elevator car, so as to determine the real-time position of the elevator car; a temperature measuring device, which is used to measure the temperature of the guide rail assembly in real time. During the use process, maintenance personnel do not need to climb into the elevator shaft to operate, which reduces the danger of the guide rail detection process. At the same time, the detection process can be carried out during the normal up and down movement of the elevator, and will not affect the normal operation of the elevator.

Description

Technical Field

[0001] The present invention is applied to the field of elevator detection, and specifically is an elevator guide rail dynamic detection system. Background Art

[0002] Elevator guide rails are mostly installed around the elevator car, and cooperate with guide shoes fixedly connected to the elevator car to limit the elevator car moving up and down. Therefore, it is directly related to the safety and comfort of the elevator. When certain parts of the guide rails repeatedly rub against the guide shoes during the lifting and lowering of the elevator car, abnormal noises will be emitted, and the friction parts of the guide rails will become thinner, affecting the riding comfort of the elevator. The existing guide rail detection method is mostly for maintenance personnel to enter the hoistway for measurement and use measuring tools to measure and detect the verticality of the guide rails. This existing detection method has the following defects:

[0003] (1) Manual testing is required, and safety hazards are likely to occur during the testing process.

[0004] (2) The inspection requires a detection tool to sequentially detect the verticality of the guide rails at each position in order to detect the degree of wear, which is time-consuming and labor-intensive. At the same time, the detection method of the guide rail wear through verticality is a static detection, and it is impossible to dynamically detect the wear position in real time. As a result, the entire inspection process cannot take into account the additional wear of the elevator guide rails caused by the wind resistance of the elevator during normal operation.

[0005] (3) Existing guide rail inspections are all manual inspections, and it is impossible to perform real-time inspection of guide rail wear when the elevator is operating normally. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an elevator guide rail dynamic detection system in view of the deficiencies in the prior art.

[0007] In order to solve the above technical problems, an elevator guide rail dynamic detection system of the present invention comprises:

[0008] Elevator car;

[0009] The guide rail assembly is made up of multiple sets of equal-length rails;

[0010] Guide shoes are symmetrically mounted on the outer wall of the elevator car and correspond to the guide rail assembly, and are used to cooperate with the guide rail assembly to limit the elevator car moving up and down;

[0011] The distance measuring device is installed on the top of the elevator car and is used to measure the distance from the top of the elevator car to the top of the hoistway in real time during the movement of the elevator car, so as to determine the real-time position of the elevator car;

[0012] The temperature measuring device is used to measure the temperature of the guide rail assembly in real time.

[0013] As a possible implementation manner, further, the plurality of sets of rails are connected with each other in a transversely adjustable manner for air avoidance adjustment after detection.

[0014] As a possible implementation manner, further, the temperature measuring device is symmetrically arranged on both sides of the rail, and the temperature measuring device is installed at one end of the mounting arm, and the other end of the mounting arm is welded to the side wall of the guide shoe.

[0015] As a possible implementation manner, further, the cross-section of the guide shoe is trapezoidal, and a trapezoidal sliding groove corresponding to the guide shoe is opened in the rail.

[0016] As a possible implementation manner, further, the distance measuring device adopts an infrared laser rangefinder or an acceleration rangefinder.

[0017] As a possible implementation manner, further, the temperature measuring device adopts an infrared thermometer.

[0018] The present invention adopts the above technical solution and has the following beneficial effects:

[0019] 1. During the use of the present invention, maintenance personnel do not need to enter the shaft to perform on-site operations, which reduces the danger of the guide rail detection process. At the same time, the detection process can be carried out during the normal up and down operation of the elevator, which will not affect the normal operation of the elevator. In addition, since the guide rail wear can be detected in real time during the operation of the elevator, the present invention can dynamically and real-time detect the guide rail wear position, so that the detection process can take into account the additional wear of the elevator guide rail caused by the wind resistance of the elevator up and down during the normal operation, making the detection result more accurate and laying the foundation for the later guide rail avoidance adjustment.

[0020] 2. The present invention can detect whether there is friction between the guide rail and the guide shoe and the height of the friction point by performing real-time detection of the temperature of the guide rail. The real-time temperature detection can be completed during the operation of the elevator. When the temperature rises due to friction, the height of the friction temperature rise point can be measured, thereby cooperating with the steel rail with a laterally adjustable position to perform air avoidance adjustment of the guide rail assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0022] Figure 1 This is a front view of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the installation position of the temperature measuring device of the present invention;

[0024] Figure 3 This is a schematic diagram of the position of the temperature measuring device when the guide rail and the guide shoe collide and rub;

[0025] Figure 4 This is a schematic diagram of the rail splicing structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the rail lateral clearance adjustment structure of the present invention;

[0027] Figure 6 This is a scatter plot of temperature and distance sampling according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] like Figure 1-5 As shown, the present invention provides an elevator guide rail dynamic detection system, which includes:

[0030] Elevator car 1;

[0031] The guide rail assembly 2 is composed of multiple sets of equal-length steel rails 201; the multiple sets of steel rails 201 are connected in a transversely adjustable manner for air avoidance adjustment after detection. Both ends of the steel rails 201 are provided with mounting plates, and corresponding strip-shaped mounting sockets are provided on the mounting plates. When installing, the mounting plates at both ends of the steel rails 201 are abutted against each other and bolts are inserted into the strip-shaped mounting sockets for locking connection.

[0032] The guide shoe 3 is symmetrically mounted on the outer wall of the elevator car 1 and corresponds to the guide rail assembly 2, and is used to cooperate with the guide rail assembly 2 to limit the elevator car 1 moving up and down; the cross-section of the guide shoe 3 is trapezoidal, and a trapezoidal slide groove corresponding to the guide shoe is opened in the steel rail 201.

[0033] The distance measuring device 4 is installed on the top of the elevator car 1, and is used to measure the distance from the top of the elevator car 1 to the top of the elevator shaft in real time during the movement of the elevator car 1, so as to determine the real-time position of the elevator car 1; the distance measuring device 4 adopts an infrared laser distance meter or an acceleration distance meter. The distance measuring device 4 can adopt the TFmini Plus infrared laser distance meter, and its measurement principle is based on the time of flight TOF (time of flight). In order to improve the efficiency of measurement, the system requires that the elevator goes up or down once in the normal operation mode to obtain all the height dimension data in the shaft. The maximum output frequency of TFmini Plus distance measurement is 1000Hz. Taking the elevator with a rated speed of 3.5m / s as an example, the distance moved by TFmini Plus in one car is only 3.5mm. The output frequency of TFmini Plus is sufficient to meet the system requirements. The distance measuring device 4 can adopt the acceleration distance meter. The main function of the acceleration sensor of this instrument is to provide the original acceleration data of the car in the vertical direction, and then calculate the displacement distance through quadratic integration. The system uses the ADXL355 three-axis accelerometer based on the MEMS structure of ADI. The ADXL355 output range supports ±2g to ±8g; it has low offset drift and low noise density characteristics; the typical power consumption is as low as 200μA, and it is as low as 20μA in standby mode, and the output dynamic response frequency is as high as 1000Hz.

[0034] The temperature measuring device 5 is used to measure the temperature of the guide rail assembly 2 in real time. The temperature measuring device 5 is symmetrically arranged on both sides of the rail 201, and the temperature measuring device 5 is installed at one end of the mounting arm 6, and the other end of the mounting arm 6 is welded to the side wall of the guide shoe 3. The temperature measuring device 5 can also be installed on the top of the elevator car 1 corresponding to the position of the guide rail assembly 2 on both sides. The temperature measuring device 5 adopts an infrared thermometer, and the infrared thermometer is an existing measuring instrument. Its specific use method, installation method and connection method are common knowledge of those skilled in the art and are not described here.

[0035] During the actual detection operation, the distance measuring device 4 and the temperature measuring device 5 are turned on. The distance measuring device 4 measures the distance from the elevator car 1 to the top of the elevator shaft in real time to determine the position of the elevator car 1. The temperature measuring device 5 measures the temperature of the two side walls of the rail 201 in real time. The inspector obtains the detection data of the distance measuring device 4 and the temperature measuring device 5 at the same time, and can make the obtained distance data and temperature data into a table for analysis. The distance data and temperature data obtained at the same time are calibrated on the horizontal and vertical coordinates respectively, and the data points on the table are observed. The vertical coordinates of most data points are almost the same, indicating that the rail temperatures corresponding to these distances are the same, and these temperature values ​​are approximately equal to the temperature in the shaft at this time. Ambient temperature, the ordinates of a few or individual data points are greater than the ordinates of the other data points, indicating that the temperature values ​​at these distance values ​​are higher than the temperature values ​​of the normal guide rail without friction, that is, it indicates that the guide rail and the guide shoe at these distance values ​​​​have friction, resulting in an increase in the guide rail temperature. After determining the position of the friction point by the distance value, the operator can adjust the steel rail 201 in the corresponding guide rail assembly 2 according to its position, and adjust the relative position of the steel rail 201 laterally by loosening the bolts on the mounting plates at both ends of the steel rail 201, and then pass the bolts through the strip mounting sockets to lock them to achieve the purpose of connecting the steel rail 201, thereby completing the clearance adjustment of the steel rail 201 for the guide shoe 3 (such as Figure 5 ).

[0036] Example:

[0037] When the ambient temperature of the shaft is 30℃, the TFmini Plus infrared laser rangefinder is used as the distance measuring device 4, and the infrared thermometer is used as the temperature measuring device 5. The elevator car 1 is controlled to descend from the top of the shaft, and the temperature and distance are sampled simultaneously with 0.5m as the test sampling interval. The results are as follows Figure 6 shown.

[0038] It can be seen from the table that when the distance between the elevator car and the top wall of the shaft is 5m and 12m, the average temperature on both sides of the guide rail is significantly higher than the average temperature on both sides of the guide rail measured at other distances, thereby determining that the guide rail assembly 2 and the guide shoe 3 collide and rub when the distance between the elevator car and the top wall of the shaft is 5m and 12m, thereby completing the precise positioning of the friction point.

[0039] The above are embodiments of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, all equivalent changes, modifications, substitutions and variations made within the scope of the patent application of the present invention without departing from the principles and spirit of the present invention should fall within the scope of the present invention.

Claims

1. An elevator guide rail dynamic detection system, characterized in that: It includes: Elevator car; The guide rail assembly is composed of multiple groups of equal-length rails. The multiple groups of rails are connected in a transversely adjustable manner for air avoidance adjustment after detection. Both ends of the rails are provided with mounting plates, and corresponding strip-shaped mounting sockets are provided on the mounting plates. During installation, the mounting plates at both ends of the rails are abutted against each other and bolts are inserted into the strip-shaped mounting sockets for locking connection. The guide shoe is symmetrically mounted on the outer wall of the elevator car and corresponds to the guide rail assembly, and is used to cooperate with the guide rail assembly to limit the elevator car moving up and down; the cross section of the guide shoe is trapezoidal, and a trapezoidal slide groove corresponding to the guide shoe is opened in the steel rail; The distance measuring device is installed on the top of the elevator car and is used to measure the distance from the top of the elevator car to the top of the hoistway in real time during the movement of the elevator car, so as to determine the real-time position of the elevator car; A temperature measuring device is used to measure the temperature of the guide rail assembly in real time. The temperature measuring device is symmetrically arranged on both sides of the rail, and the temperature measuring device is installed at one end of the mounting arm, and the other end of the mounting arm is welded to the side wall of the guide shoe. The temperature measuring device is installed on the top of the elevator car corresponding to the position of the guide rail assemblies on both sides, and the detection data of the distance measuring device and the temperature measuring device are obtained at the same time. When the temperature value under the distance value in the detection data is higher than the temperature value of the guide rail assembly without normal friction, it indicates that the guide rail assembly under the distance value and the guide shoe have friction. After determining the position of the friction point by the distance value, the rails in the corresponding guide rail assembly are adjusted according to the position of the friction point. After loosening the bolts on the mounting plates at both ends of the rail, the relative position of the rail is adjusted laterally, and then the bolts are passed through the strip mounting socket for locking to achieve the purpose of connecting the rail. Wherein, the distance measuring device adopts an infrared laser rangefinder or an acceleration rangefinder; the temperature measuring device adopts an infrared thermometer.

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