Elevator braking torque detection device

Abstract

The utility model discloses an elevator braking torque detection device which comprises an elevator guide mechanism, and a detection mechanism is installed on the elevator guide mechanism. The detection mechanism comprises a mounting frame, the mounting frame is connected with a roller frame through an adjusting screw rod and an elastic sheet, a measuring wheel is mounted in the roller frame through a shaft rod, a magnetoelectric wheel speed sensor is mounted on one side of the roller frame, and a controller is mounted on the other side of the roller frame; an elastic supporting mechanism is arranged on the inner side of the mounting frame, the elastic supporting mechanism comprises a mounting barrel, a spring is mounted in the mounting barrel, the upper end of the spring is connected with a pressing plate, and a sliding block connected to the side edge of the mounting frame is arranged on one side of the pressing plate. The detection mechanism detects the characteristic parameters of the traction steel wire rope of the guide mechanism, and the safety performance of the braking torque is detected and whether a fault occurs or not is judged by measuring the change of the characteristic parameters.

Description

Technical Field

[0001] The utility model relates to the technical field of braking torque detection, in particular to an elevator braking torque detection device. Background Art

[0002] As a kind of widely used special transportation equipment, the safety of elevators has received widespread attention. In recent years, accidents such as top collision, bottom squatting, shearing and squeezing due to elevator brake failure have occurred, and insufficient braking torque is often the main reason for brake failure. In order to ensure the safe operation of elevators, regular safety inspections are essential in addition to daily maintenance.

[0003] Elevator braking capacity detection is one of the elevator inspection items, which directly reflects the braking performance of the equipment and is related to the safety of equipment operation. After the elevator is installed, as the operation time increases, the safety accidents caused by aging and damage of structural components increase year by year, and there is no clear quantitative evaluation standard for the braking capacity of the elevator.

[0004] However, the existing technology generally detects the braking torque of the elevator by the size of the braking force of the brake shoe and the brake wheel, that is, by the pressure of the brake shoe. However, after braking, the brake shoe is prone to slip due to factors such as aging, causing danger, and it is impossible to accurately detect the braking torque and other problems. Utility Model Content

[0005] The purpose of the utility model is to provide an elevator braking torque detection device, so as to overcome the defect in the prior art that when the elevator braking torque is detected by the pressure of the brake shoe, the brake shoe is prone to slip due to factors such as aging of the brake shoe, making the elevator braking torque judged by the pressure of the brake shoe not accurate enough.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An elevator braking torque detection device comprises an elevator guide mechanism, on which a detection mechanism is fixedly mounted;

[0008] The detection mechanism includes a mounting frame, an adjusting screw is installed on the middle thread of the mounting frame, an elastic sheet is movably connected to the bottom end of the adjusting screw, a roller frame is fixedly connected to the bottom of the elastic sheet, a measuring wheel is installed inside the roller frame through an axle, a magnetoelectric wheel speed sensor is fixedly installed on one side of the roller frame, and a controller is fixedly installed on the other side of the roller frame;

[0009] An elastic support mechanism is fixedly provided on the inner side of the mounting frame, and the elastic support mechanism includes a mounting tube fixed on the inner wall of the mounting frame, a spring is installed inside the mounting tube, a pressure plate is connected to the upper end of the spring, and a slider fixedly connected to the side of the mounting frame is provided on one side of the pressure plate.

[0010] Preferably, a control module is provided inside the controller, the control module is electrically connected to a data acquisition module, the data acquisition module is electrically connected to an AD converter, the AD converter is electrically connected to a preamplifier, and the preamplifier is electrically connected to the magnetoelectric wheel speed sensor.

[0011] Preferably, a power supply module is provided inside the controller, a voltage regulating module is electrically connected to the power supply module, and the voltage regulating module is electrically connected to the control module.

[0012] Preferably, the control module is electrically connected to a clock module, the control module is electrically connected to a reset circuit, the control module is electrically connected to a communication module, and the communication module is communicatively connected to a remote terminal.

[0013] Preferably, the elevator guide mechanism includes two bearing seats for fixed installation, and bearing caps are respectively fixedly installed on the two bearing seats.

[0014] Preferably, a main shaft is movably installed between the bearing seats and the bearing caps on both sides, and a traction wire rope guide wheel is installed on the main shaft.

[0015] Preferably, two sides of the mounting frame are mounted on the outer sides of the two bearing seats by means of fixing bolts, and a rotating hand wheel is fixedly mounted on the top end of the adjusting screw.

[0016] Preferably, the detection head of the magnetoelectric wheel speed sensor is located on one side of the measuring wheel.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. When the utility model is in use, the sliding of the traction wire rope on the elevator guide mechanism is detected by the detection mechanism, that is, the detection mechanism detects the sliding of the traction wire rope through the measuring wheel, and then obtains the speed of the traction wire rope sliding throughout the whole process through the magnetoelectric wheel speed sensor. Since the sliding speed of the traction wire rope is the key data for calculating the braking torque, when the sliding speed is abnormal, it means that there is a problem with the elevator braking torque, which can remind the staff to perform timely maintenance.

[0019] 2. The magnetoelectric wheel speed sensor collects the sliding speed of the traction wire rope, and the control module collects the sliding time through the clock module. The sliding distance and sliding acceleration can be obtained through the sliding speed and sliding time. That is, the braking distance or the sliding amount (sliding distance), braking time, braking speed, braking acceleration, etc. are all characteristic parameters for braking torque detection. By measuring the changes in these characteristic parameters, the safety performance of the braking torque can be detected and whether a fault occurs can be determined.

[0020] 3. The detection mechanism adjusts the position of the roller frame by adjusting the screw and the elastic sheet, so that the measuring wheel can fit on the traction wire rope, which is convenient for driving the measuring wheel to rotate when the traction wire rope slides. In order to achieve adaptive adjustment, it is supported and installed by an elastic support mechanism, that is, adaptive adjustment is performed by springs and elastic sheets to prevent excessive extrusion of the measuring wheel and friction damage to the traction wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the elevator guide mechanism of the utility model;

[0023] Figure 3 It is a schematic diagram of the detection mechanism of the utility model;

[0024] Figure 4 It is a cross-sectional view of the detection mechanism of the utility model;

[0025] Figure 5 This is a system framework diagram of the controller of the present utility model.

[0026] In the figure: 1. elevator guide mechanism; 101. bearing seat; 102. bearing cap; 103. main shaft; 104. traction wire rope guide wheel; 2. detection mechanism; 201. mounting frame; 202. adjusting screw; 203. elastic sheet; 204. roller frame; 205. shaft rod; 206. measuring wheel; 207. magnetoelectric wheel speed sensor; 208. controller; 209. elastic support mechanism; 2091. mounting cylinder; 2092. spring; 2093. pressure plate; 2094. slider; 210. rotating hand wheel; 211. fixing bolt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-Figure 5 The utility model provides an elevator braking torque detection device, including an elevator guide mechanism 1. In order to enable the elevator guide mechanism 1 to be fixedly installed, it is preferred in this embodiment that the elevator guide mechanism 1 includes two bearing seats 101 for fixed installation, and bearing caps 102 are fixedly installed on the two bearing seats 101. In order to enable the traction wire rope guide wheel 104 to achieve stable rotation and facilitate guidance, it is preferred in this embodiment that a main shaft 103 is movably installed between the bearing seats 101 and the bearing caps 102 on both sides, and a traction wire rope guide wheel 104 is installed on the main shaft 103. The traction wire rope guide wheel 104 is used to guide and pull the traction wire rope.

[0029] Continue to refer Figure 1 , Figure 3 and Figure 4 A detection mechanism 2 is fixedly installed on the elevator guide mechanism 1, and the detection mechanism 2 includes a mounting frame 201. An adjusting screw 202 is installed on the middle thread of the mounting frame 201. An elastic sheet 203 is movably connected to the bottom end of the adjusting screw 202. A roller frame 204 is fixedly connected to the bottom of the elastic sheet 203. A measuring wheel 206 is installed inside the roller frame 204 through an axle rod 205. A magnetoelectric wheel speed sensor 207 is fixedly installed on one side of the roller frame 204, and a controller 208 is fixedly installed on the other side of the roller frame 204. An elastic support mechanism 209 is fixedly provided on the inner side of the mounting frame 201, and the elastic support mechanism 209 includes a mounting cylinder 2091 fixed on the inner wall of the mounting frame 201, and a longitudinal slide groove is provided on one side of the mounting cylinder 2091. A spring 2092 is installed inside the mounting cylinder 2091, and a pressure plate 2093 is connected to the upper end of the spring 2092. A longitudinal slide groove extends from one side of the pressure plate 2093 and is connected to a slider 2094 fixedly connected to the side of the mounting frame 201. The setting of the longitudinal slide groove facilitates the fixed connection between one side of the pressure plate 2093 and the slider 2094, so that the slider 2094 can be protected under the action of the spring 2092 to reduce movement collision.

[0030] In order to detect the sliding distance of the traction wire rope and calculate the detected distance, it is preferred in this embodiment that a control module is provided inside the controller 208. In this embodiment, the control module can adopt a 51 single-chip microcomputer, an STM32 single-chip microcomputer or a DSP single-chip microcomputer, etc. The control module is electrically connected to a data acquisition module, and the entire system is controlled and adjusted through the control module to issue and process various instructions, and to process the collected data information. The data acquisition module pre-processes the collected data information, including receiving, filtering and amplifying, etc. The data acquisition module is electrically connected to an AD converter, and the AD converter is electrically connected to a preamplifier. The preamplifier is electrically connected to the magnetoelectric wheel speed sensor 207, and the data information is received through the data acquisition module, and the AD converter is used to convert analog information into digital information, and the preamplifier amplifies the data. In order to power the controller 208, it is preferred in this embodiment that a power supply module is provided inside the controller 208, and a voltage regulating module is electrically connected to the power supply module. The voltage regulating module is electrically connected to the control module. The power supply module is powered by the elevator power supply system, and the voltage regulating module realizes voltage reduction, rectification, filtering and stable voltage transmission. If the power supply module is a power supply, the voltage regulating module is composed of a transformer and a filtering and rectifying circuit to maintain stable power supply.

[0031] In order to detect the sliding time of the traction wire rope and the operation of the auxiliary controller 208, and complete the remote transmission of data, it is preferred in this embodiment that a clock module is electrically connected to the control module, and a reset circuit is electrically connected to the control module. The reset circuit is used to restart when a system failure occurs. The control module is electrically connected to a communication module, and the communication module is connected to the remote terminal of the elevator system for communication. The clock module is used for timing, and the communication module realizes the function of communication transmission to realize remote detection and control.

[0032] In order to facilitate the installation and connection between the detection mechanism 2 and the elevator guide mechanism 1, and to facilitate the adjustment of the position of the detection mechanism 2 and the fitting connection with the traction wire rope, in this embodiment, preferably, both sides of the mounting frame 201 are installed on the outside of the two bearing seats 101 through fixing bolts 211, and a rotating hand wheel 210 is fixedly installed on the top of the adjusting screw 202. In order to enable the magnetoelectric wheel speed sensor 207 to measure the measuring wheel 206, a gear ring is fixedly installed or embedded on one side of the measuring wheel 206. When the gear ring of the measuring wheel 206 rotates, the change of the magnetic field will cause the change of the electrical signal of the magnetoelectric wheel speed sensor 207, thereby generating an electrical signal related to the rotation speed. In this embodiment, preferably, the detection head of the magnetoelectric wheel speed sensor 207 is located on one side of the measuring wheel 206.

[0033] Working principle: When in use, the main shaft 103 and the traction wire rope guide wheel 104 are installed through the bearing seat 101 and the bearing cap 102, and then the elevator guide mechanism 1 is fixed and installed, and the traction wire rope is guided and transported through the traction wire rope guide wheel 104, and then the detection mechanism 2 is installed on both sides of the bearing seat 101 through the mounting frame 201 and the fixing bolts 211, and the adjusting screw 202 is rotated by rotating the hand wheel 210, so that the adjusting screw 202 can pass through the elastic sheet 2 03 The position of the mounting frame 201 is adjusted so that the measuring wheel 206 can fit on the traction wire rope, and elastic support mechanisms 209 are provided on both sides of the mounting frame 201. A pressure plate 2093 is connected inside the mounting cylinder 2091 through a spring 2092, and sliders 2094 connected to the pressure plate 2093 are provided on both sides of the mounting frame 201, so that when the measuring wheel 206 fits the traction wire rope, if it fits too closely, adaptive adjustment can be facilitated to prevent the measuring wheel 206 from being damaged by friction.

[0034] When the elevator braking torque is detected, the elevator goes up, and when the emergency stop is pressed on the middle floor, the elevator system sends a signal to the control module, and the control module sends a signal to the magnetoelectric wheel speed sensor 207 and the clock module to start measuring. The clock module starts timing. When the measuring wheel 206 rotates following the sliding traction wire rope, the magnetoelectric wheel speed sensor 207 measures the sliding distance of the traction wire rope, that is, when the gear ring of the measuring wheel 206 rotates, the change of the magnetic field will cause the electrical signal of the magnetoelectric wheel speed sensor 207 to change, thereby generating an electrical signal related to the rotation speed, which is then calculated and processed by the controller 208 to obtain the speed of the measuring wheel 206. Combined with the timing, The timing of the clock module can obtain the average speed of the measuring wheel 206 throughout the whole journey, that is, the data information detected by the magnetoelectric wheel speed sensor 207 is amplified by the preamplifier, and then the analog-to-digital conversion is performed by the AD converter, and then the data information is received by the data acquisition module. The control module collects the sliding time through the clock module, that is, when the elevator suddenly stops, the traction wire rope guide wheel 104 will decelerate sharply under the traction of the traction wire rope until the traction wire rope guide wheel 104 and the measuring wheel 206 stop, and the clock module stops timing. This period of time is the elevator braking time. The sliding distance of the traction wire rope can be obtained by the average speed and sliding time. For example, to calculate the sliding distance and acceleration, assume that the collected average speed is V, the sliding time is T, then the sliding distance is S=VT, the sliding acceleration is a=V / T, and the calculation formula for the emergency stop braking torque is:

[0035]

[0036] It can be proved by the above existing formula that the braking distance or the amount of sliding (gliding distance), braking time, braking speed, braking acceleration, etc. are all characteristic parameters for braking torque detection. By measuring the changes in these characteristic parameters, the safety performance detection and fault diagnosis of the braking torque can be realized, and then transmitted to the remote terminal through the communication module, so that the remote terminal can combine the distance corresponding to the elevator type. The shorter the sliding distance is, the better, but it must be within a certain range. In addition, the fixedly installed detection mechanism 2 is convenient for detecting the braking torque of the elevator at all times to improve the operation safety of the elevator. In addition, the present application is fixedly installed on the elevator for real-time detection of the braking torque of the elevator, which can effectively detect the elevator when it is in operation and use, and realize the prediction and judgment of the operation fault of the elevator.

[0037] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator braking torque detection device, comprising an elevator guide mechanism (1), characterized in that: A detection mechanism (2) is fixedly mounted on the elevator guide mechanism (1); The detection mechanism (2) comprises a mounting frame (201), an adjusting screw (202) is installed on the middle thread of the mounting frame (201), the bottom end of the adjusting screw (202) is movably connected to an elastic sheet (203), the bottom of the elastic sheet (203) is fixedly connected to a roller frame (204), a measuring wheel (206) is installed inside the roller frame (204) via a shaft (205), a magnetoelectric wheel speed sensor (207) is fixedly installed on one side of the roller frame (204), and a controller (208) is fixedly installed on the other side of the roller frame (204); An elastic support mechanism (209) is fixedly provided on the inner side of the mounting frame (201), wherein the elastic support mechanism (209) comprises a mounting tube (2091) fixed on the inner wall of the mounting frame (201), a spring (2092) is installed inside the mounting tube (2091), a pressure plate (2093) is connected to the upper end of the spring (2092), and a slider (2094) fixedly connected to the side of the mounting frame (201) is provided on one side of the pressure plate (2093).

2. An elevator braking torque detection device according to claim 1, characterized in that: The controller (208) is provided with a control module inside, the control module is electrically connected to a data acquisition module, the data acquisition module is electrically connected to an AD converter, the AD converter is electrically connected to a preamplifier, and the preamplifier is electrically connected to the magnetoelectric wheel speed sensor (207).

3. An elevator braking torque detection device according to claim 2, characterized in that: The controller (208) is provided with a power supply module inside, the power supply module is electrically connected to a voltage regulating module, and the voltage regulating module is electrically connected to the control module.

4. An elevator braking torque detection device according to claim 2, characterized in that: The control module is electrically connected to a clock module, the control module is electrically connected to a reset circuit, the control module is electrically connected to a communication module, and the communication module is communicatively connected to a remote terminal.

5. An elevator braking torque detection device according to claim 1, characterized in that: The elevator guide mechanism (1) comprises two bearing seats (101) for fixed installation, and bearing caps (102) are respectively fixedly installed on the two bearing seats (101).

6. An elevator braking torque detection device according to claim 5, characterized in that: A main shaft (103) is movably installed between the bearing seats (101) and the bearing caps (102) on both sides, and a traction wire rope guide wheel (104) is installed on the main shaft (103).

7. An elevator braking torque detection device according to claim 5, characterized in that: The two sides of the mounting frame (201) are mounted on the outer sides of the two bearing seats (101) via fixing bolts (211), and a rotating hand wheel (210) is fixedly mounted on the top of the adjusting screw rod (202).

8. An elevator braking torque detection device according to claim 1, characterized in that: The detection head of the magnetoelectric wheel speed sensor (207) is located on one side of the measuring wheel (206).

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