CN107857180A - A kind of detecting system and method for accidental movement of elevator cage defencive function - Google Patents

Abstract

The present invention proposes a detection system and method for the accidental movement protection function of an elevator car. The detection system includes: a control system, a velocity displacement measurement subsystem, a safety loop monitoring subsystem, a brake control subsystem and a hand-held terminal, wherein the velocity displacement The measurement subsystem is connected with the control system; the safety circuit monitoring subsystem is respectively connected with the control system and the protection device for unexpected movement of the elevator car, and is used to monitor the action of the safety circuit in the protection device; the brake control subsystem They are respectively connected with the control system and the brake circuit of the elevator, and are used to control the opening and closing of the elevator brake. The present invention respectively controls the above-mentioned multiple subsystems through the control system to detect and protect the accidental movement of the elevator car, which is universal, reasonable and safe. The process can be used and has great practical value.

Description

A detection system and method for an elevator car accidental movement protection function

technical field

The invention belongs to the field of inspection and detection of special equipment, and in particular relates to a detection system and method for the protection function of accidental movement of an elevator car.

Background technique

With the rapid development of the economy and the ever-changing cities, various high-rise buildings are increasing day by day. Elevators installed in high-rise buildings are playing an increasingly important role in people's lives and have become an important means of transportation for people's daily travel. At the same time, as a kind of electromechanical special equipment, the safety of elevators has attracted more and more attention. Among them, the accidental movement of the elevator car is very dangerous to passengers, and once it happens, the consequences will be extremely serious.

Unexpected movement of the elevator car is an extremely dangerous state, which is the main cause of accidents such as shearing and extrusion, and directly affects the life safety of passengers. Therefore, it is an important protective measure on the elevator to use the device on the elevator to monitor the running status of the car and detect whether it moves unexpectedly, and to stop the car in time through relevant components. In the No. 1 revision of GB7588-2003 "Safety Code for Elevator Manufacture and Installation", the clauses on the protection requirements for the accidental movement of the elevator car are added, and new requirements are put forward for the elevator inspection and testing industry. TSG T7001-2009 "Elevator Supervision Inspection and Periodic Inspection Rules - Traction and Forced Drive Elevators" No. 2 Amendment also gives the relevant inspection content and requirements: "①The car is empty on the upper part of the hoistway. The test speed given in the test certificate goes up and triggers the braking and stopping components. Only the braking and stopping components can be used to stop the elevator, and the moving distance of the car is within the range given in the type test certificate; As a braking component, when the brake is lifted or released and fails, or the braking force is insufficient, the car door and landing door should be closed and the normal start of the elevator should be prevented."

At present, in the elevator industry, the detection method of the car accidental movement protection function is still determined by each manufacturer, and there is a disadvantage that the method is not uniform enough and cannot be easily detected. For example, a common detection method is to confirm that the elevator car is unloaded and unmanned, drive the elevator to a certain floor and stop at the same floor. At this time, the car door will usually be closed. , so that the elevator door lock circuit is in disconnection mode to simulate the door lock circuit situation when the car moves unexpectedly, and then make the elevator run slowly up or down through maintenance operations or other methods. When the car leaves the original landing position, the detection device in the protective measures to prevent accidental movement of the car should respond in a timely manner and trigger the brake action to stop the car. There is a large difference between the experimental conditions of this method and the real dangerous situation of the unexpected movement of the elevator car, and there is no effective measurement of the distance of the car moving. To sum up, there is currently no general, reasonable and safe detection method for the protection function of elevator car accidental movement, so as to facilitate the use in inspections such as elevator installation self-inspection, supervisory inspection, periodic inspection, and supervisory random inspection.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention proposes a detection system and method for the accidental movement protection function of the elevator car, which is universal, reasonable and safe, and can be used in elevator installation self-inspection, supervisory inspection, regular inspection, maintenance, supervision Spot checks and other processes can be used and have great practical value. It can promote the transformation of scientific and technological achievements in the special equipment inspection and testing industry, improve industry competitiveness, and promote the development of quality supervision. It is of great importance to ensuring public safety and protecting people's lives and property. significance.

In order to solve the problems of the technologies described above, the technical scheme that the present invention takes is:

The present invention proposes a detection system for the accidental movement protection function of the elevator car, including:

Control System;

a speed displacement measurement subsystem, which is connected to the control system and is used to measure the speed and distance of the movement of the elevator car;

A safety loop monitoring subsystem, which is respectively connected with the control system and the protection device for accidental movement of the elevator car, and is used to monitor the action of the safety circuit in the protection device;

The brake control subsystem is connected with the control system and the brake circuit of the elevator respectively, and is used to control the opening and closing of the brake of the elevator.

Further, the control system includes: a controller, a wireless communication circuit, a charging and power supply circuit, an A/D converter and a signal conversion circuit, wherein the wireless communication circuit is connected to the controller, and the charging and power supply circuit The circuit is connected with the rechargeable battery, the input terminal of the controller is respectively connected with the charging and power supply circuit and the A/D converter, and the signal transformation circuit is connected with the input terminal of the A/D converter.

Further, the speed-displacement measurement subsystem includes: a speed-displacement processing module, a speed-measuring rubber wheel, and a rotary encoder, wherein the speed-displacement processing module is connected to the signal conversion circuit, and the speed-measuring rubber wheel is connected to the limit of the elevator. The speed wheel is connected, and the rotary encoder is respectively connected with the speed displacement processing module and the main shaft of the speed measuring rubber wheel, and sends the displacement signal and speed signal of the elevator to the control system.

Further, the safety loop monitoring subsystem includes: an on-off device for monitoring the elevator safety loop, which is respectively connected to the safety loop and a signal conversion circuit, and sends the on-off signal of the safety loop to the control system.

Further, the brake control subsystem includes: a power supply, a voltage regulation module and a switch controller, wherein the voltage regulation module is connected to the power supply, and the switch controller is connected to the signal conversion circuit and the voltage regulation module respectively It is connected with the brake circuit of the elevator.

Further, it also includes: a handheld terminal, which is connected to the control system through the wireless communication circuit, and is controlled through a man-machine interface of the handheld terminal to realize information interaction.

Further, the power supply is 220V.

In another aspect of the present invention, a method for detecting the accidental movement protection function of the elevator car using the aforementioned detection system is proposed, comprising the following steps:

(1) Open the brake of the elevator by controlling the hand-held terminal, and the elevator slips;

(2) When the sliding speed reaches the action threshold of the protection device for accidental movement of the elevator car, the protection device is triggered to act, and the safety circuit in the protection device is disconnected, and the disconnected signal is sent by the safety circuit monitoring subsystem It is detected that the safety loop monitoring subsystem sends the disconnected signal to the control system;

(3) The control system controls the brake control subsystem to stop outputting the voltage supporting the opening of the elevator brake, and the elevator brake acts and closes to stop the elevator;

(4) When the elevator stops, the speed displacement measurement subsystem transmits the displacement signal and the speed signal to the control system for processing, and then displays the displacement of the elevator car through the handheld terminal. When the displacement of the elevator car is within the range of the detection standard displacement When inside, the protection function of the elevator meets the standard requirements.

Further, it also includes: when the protection device fails, the speed displacement measurement subsystem sends the instant speed of the elevator car to the control system, and matches it with the preset rated speed of the elevator in the control system. When the instant speed reaches 150% of the rated speed of the elevator, the control system controls the release of the elevator brake to stop the elevator for protection.

The beneficial effects of the present invention include: the detection system and method of the elevator car accidental movement protection function described in the present invention are universal, reasonable and safe, and can be used in elevator installation self-inspection, supervisory inspection, regular inspection, maintenance, supervision and spot check It can be used in other processes and has great practical value. It can promote the transformation of scientific and technological achievements in the special equipment inspection and testing industry, improve the competitiveness of the industry, and promote the development of quality supervision. It is of great significance to ensure public safety and protect people's lives and property. .

Description of drawings

Fig. 1 is a structural block diagram of the detection system of the present invention.

Fig. 2 is a functional block diagram of the detection system of the present invention.

Fig. 3 is a flowchart of the detection method of the present invention.

Fig. 4 is a schematic diagram of the measurement display interface of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with specific examples. The embodiments described below are exemplary only for explaining the present invention and should not be construed as limiting the present invention. If no specific technique or condition is indicated in the examples, it shall be carried out according to the technique or condition described in the literature in this field or according to the product specification.

According to an embodiment of the present invention, Fig. 1 is a structural block diagram of the detection system of the present invention, and Fig. 2 is a functional block diagram of the detection system of the present invention, with reference to Fig. 1 and shown in 2, the detection system of the present invention comprises: control system, velocity displacement Measurement subsystem, safety loop monitoring subsystem, brake control subsystem and handheld terminal, wherein, according to some embodiments of the present invention, the control system of the present invention is a common control system, which may include: a microprocessor system or a PLC control system , the present invention is preferably a microprocessor system.

According to some embodiments of the present invention, the microprocessor system of the present invention is the core part of the entire detection system, and is used for the control of the entire detection system, more specifically: realizing information interaction with the handheld terminal; Process the data signal sent by the measurement subsystem, wherein the data signal in the present invention is preferably a speed signal and a displacement signal; process the on-off signal sent by the safety loop monitoring subsystem; The system operates the switch controller, controls the on-off of the elevator brake circuit, and completes the opening and closing of the elevator brake.

According to some embodiments of the present invention, the microprocessor system of the present invention includes: a microprocessor, a wireless communication circuit, a charging and power supply circuit, an A/D converter, and a signal conversion circuit, wherein the wireless communication circuit and the The microprocessor is connected, the charging and power supply circuit is connected with the rechargeable battery, the input terminals of the microprocessor are respectively connected with the charging and power supply circuit and the A/D converter, and the signal conversion circuit is connected with the A/D converter. /D converter input connected.

According to some embodiments of the present invention, as shown in Fig. 1 and Fig. 2, the velocity-displacement measurement subsystem of the present invention includes: a velocity-displacement processing module and a velocity measuring device, wherein the velocity-displacement processing module and the microprocessor The signal conversion circuit of the system is connected, and the speed measuring device includes: a speed measuring rubber wheel and a rotary encoder, wherein the speed measuring rubber wheel is connected with the speed limiting wheel of the elevator, and the rotary encoder is respectively connected with the speed displacement processing The module is connected to the main shaft of the speed-measuring rubber wheel, and is used to measure the moving speed and distance of the elevator car, and send the displacement signal and speed signal of the elevator to the microprocessor system, more specifically, the speed-measuring rubber wheel The edge of the elevator is in contact with the edge of the speed-limiting wheel of the elevator, and the speed-measuring rubber wheel is driven to rotate by the speed-limiting wheel of the elevator for measurement.

According to some embodiments of the present invention, as shown in Fig. 1 and Fig. 2, the safety loop monitoring subsystem of the present invention includes: a device for monitoring the on-off of the elevator safety loop and a signal conversion circuit, wherein the monitoring of the on-off of the elevator safety loop One end of the device is connected to the safety circuit of the protection device for accidental movement of the elevator car, and the other end is connected to the signal conversion circuit of the microprocessor system through its signal conversion circuit, which is used to monitor the action of the safety circuit, and Send the on-off signal of the safety circuit of the elevator to the microprocessor system.

According to some embodiments of the present invention, as shown in Fig. 1 and Fig. 2, the brake control subsystem of the present invention includes: a 220V power supply, a voltage regulation module and a switch controller, wherein the voltage regulation module and the 220V power supply The switch controller is respectively connected with the signal conversion circuit of the microprocessor system, the voltage regulation module and the brake circuit of the elevator, and is used to control the opening and closing of the elevator brake.

According to some embodiments of the present invention, the voltage regulation module of the present invention is an AC/DC voltage regulation module.

It can be understood that, referring to Fig. 2, the elevator protection device and the elevator brake circuit of the present invention are arranged in the elevator control cabinet.

According to some embodiments of the present invention, the handheld terminal of the present invention is connected to the microprocessor system through the wireless communication circuit, and is controlled through the man-machine interface of the handheld terminal to realize information interaction.

In another aspect of the present invention, a method for detecting using the aforementioned detection system is proposed. Fig. 3 is a flow chart of the detection method of the present invention, and Fig. 4 is a schematic diagram of the measurement display interface of the present invention, with reference to Fig. 3 and As shown in Fig. 4, it specifically includes the following steps.

(1) The inspector sends instructions wirelessly to the microprocessor system through a handheld terminal, and the microprocessor system controls the switch controller of the brake control subsystem, connects the brake circuit of the elevator, and outputs a support brake Switch the voltage and turn it on, and the unloaded elevator will slip due to the unbalanced weight on both sides.

(2) When the sliding speed reaches the action threshold of the protection device for accidental movement of the elevator car, the protection device is triggered to act, and the safety circuit in the protection device is disconnected, and the disconnected signal is sent by the safety circuit monitoring subsystem It is detected that the safety loop monitoring subsystem sends the signal of disconnection to the microprocessor system.

(3) The microprocessor system controls the switch controller of the brake control subsystem, cuts off the brake circuit of the elevator, stops outputting the voltage supporting the opening of the elevator brake, and the elevator brake acts and closes to stop the elevator.

(4) When the elevator stops, the speed displacement measurement subsystem transmits the displacement signal and speed signal to the microprocessor system for processing, and displays the displacement of the elevator car through the handheld terminal. (Preset safety standard displacement) within the range, it meets the requirements of the industry testing standards, and the protection function of the elevator meets the standard requirements.

According to some embodiments of the present invention, when the protection device does not work normally and the car accidental movement protection function fails, the speed displacement measurement subsystem sends the instant speed of the elevator car to the microprocessor system, and the The preset elevator rated speed in the microprocessor system is matched. When the instant speed reaches 150% of the elevator rated speed, the microprocessor system sends a signal to the switch controller of the brake control subsystem to cut off the elevator. The brake circuit of the elevator releases the elevator brake and stops the elevator for protection. When the protection device for the accidental movement of the elevator car does not work normally, the detection result of the present invention is unqualified. At this time, the elevator car will continue to move upward, thereby causing damage to the elevator equipment itself. In order to protect the elevator equipment Protect itself, through the detection system of the present invention, preventive measures have been made to this.

According to some embodiments of the present invention, the rated speed of the elevator in the present invention is input into the handheld terminal when starting the test.

The inventors found that the detection system and method for the protection function of the accidental movement of the elevator car according to the present invention are universal, reasonable and safe, and can be used in the process of elevator installation self-inspection, supervisory inspection, regular inspection, maintenance, supervision and random inspection, etc. It can be used and has great practical value. It can promote the transformation of scientific and technological achievements in the special equipment inspection and testing industry, improve the competitiveness of the industry, and promote the development of quality supervision. It is of great significance to ensure public safety and protect people's lives and property.

In the present invention, unless otherwise clearly specified and limited, terms such as "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical A connection can also be an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of this specification, reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" means that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiment can be changed, modified, replaced and modified. Meanwhile, for those skilled in the art, there will be changes in the specific implementation and application scope according to the idea of the application.

Claims (9)

1. A kind of 1. detecting system of accidental movement of elevator cage defencive function, it is characterised in that including：

   Control system；

   Speed displacement measures subsystem, and it is connected with the control system, for measuring the speed and distance of lift car movement；

   Safety return circuit Monitor And Control Subsystem, its protection device respectively with the control system and accidental movement of elevator cage are connected, For monitoring the action of the safety return circuit in the protection device；

   Brake control subsystem, its brake circuit respectively with the control system and elevator is connected, for controlling elevator The unlatching of brake and closure.
2. 2. detecting system according to claim 1, it is characterised in that the control system includes：Controller, radio communication Circuit, charging and power supply circuit, A/D converter and signal conversion circuit, wherein, the radio communication circuit and the controller Be connected, the charging and power supply circuit are connected with rechargeable battery, the input of the controller respectively with the charging and power supply Circuit is connected with A/D converter, and the signal conversion circuit is connected with the input of the A/D converter.
3. 3. detecting system according to claim 2, it is characterised in that the speed displacement measurement subsystem includes：Speed Displacement processing module, test the speed rubber tire and rotary encoder, wherein, the speed displacement processing module and the signal conversion circuit Be connected, the rubber tire that tests the speed is connected with the speed limited wheel of elevator, the rotary encoder respectively with the speed displacement processing module It is connected with the main shaft of the rubber tire that tests the speed, the displacement signal of elevator and rate signal is sent to the control system.
4. 4. detecting system according to claim 2, it is characterised in that the safety return circuit Monitor And Control Subsystem includes：Monitoring Elevator safety loop on-off system, it is connected respectively with the safety return circuit and signal conversion circuit, by the logical of the safety return circuit Break signal is sent to the control system.
5. 5. detecting system according to claim 2, it is characterised in that the brake control subsystem includes：Power supply, tune Die block and switch controller, wherein, the voltage regulating module is connected with the power supply, the switch controller respectively with the letter Number translation circuit, voltage regulating module are connected with the brake circuit of elevator.
6. 6. detecting system according to claim 2, it is characterised in that also include：Handheld terminal, it passes through the channel radio Letter circuit is connected with the control system, is controlled by the man-machine interface of the handheld terminal, realizes information exchange.
7. 7. detecting system according to claim 5, it is characterised in that the power supply is 220V.
8. 8. a kind of detecting system using any one of claim 1-7 is carried out to accidental movement of elevator cage defencive function The method of detection, it is characterised in that comprise the following steps：

   （1）Elevator brake is controlled to open by handheld terminal, car slipping occurs in elevator；

   （2）When car slipping speed reaches the action threshold value of the protection device of accidental movement of elevator cage, the protection device is triggered Action, the safety return circuit in the protection device is disconnected, the signal of disconnection is monitored by safety return circuit Monitor And Control Subsystem, described Safety return circuit Monitor And Control Subsystem sends the signal of the disconnection to the control system；

   （3）The control system controls the brake control subsystem to stop the voltage that output supports elevator brake to open, The elevator brake is acted and closed, stop elevator；

   （4）During elevator stopping, displacement signal and rate signal are sent at the control system by speed displacement measurement subsystem After reason, lift car displacement is shown by handheld terminal, when lift car displacement is when in the range of examination criteria displacement, The defencive function of elevator meets standard requirement.
9. 9. according to the method for claim 8, it is characterised in that also include：When the protection device fails, speed displacement Measurement subsystem sends the instantaneous velocity of lift car to the control system, with default elevator volume in the control system Constant speed degree is matched, when the instantaneous velocity reaches the 150% of the rated speed of lift, the control system control electricity Terraced brake release, stop elevator, is protected.