Vertical elevator electronic safety clamp and grating scale, magnetic scale reliable action detection system

Abstract

The present invention discloses a reliable operation detection system for an electronic safety clamp and a grating scale / magnetic scale for a vertical elevator. The system comprises an electronically triggered instantaneous safety clamp device, a grating scale / magnetic scale, a grating scale reader / magnetic scale reader, an encoder, and a main control board. The grating scale / magnetic scale runs through the elevator shaft, allowing the grating scale reader / magnetic scale reader to detect the elevator's running speed and position in real time. The encoder is mounted on the traction machine, allowing the main control board to detect the elevator's running speed and position in real time. The grating scale reader / magnetic scale reader and the main control board are each electrically connected to the electronically triggered instantaneous safety clamp device, and the grating scale reader / magnetic scale reader is electrically connected to the main control board to form an electrical safety circuit. The present invention utilizes a main control board + encoder, a grating scale / magnetic scale + reader, dual-path detection, independent operation, automatic detection during power-off and power-on, 24-hour automatic detection during standby, and manual detection to ensure reliable operation of the electronically triggered instantaneous safety clamp and the grating scale / magnetic scale.

Description

Technical Field

[0001] The present invention relates to the technical field of vertical elevators, and in particular to a reliable action detection system for a vertical elevator electronic safety clamp, a grating scale, and a magnetic scale. Background Art

[0002] With the continuous development of society and the improvement of people's living standards, vertical elevators have become an indispensable equipment in our lives. At the same time, people's requirements for vertical elevator safety and comfort are also increasing. As a result, electronically triggered instantaneous safety clamps have emerged to replace traditional mechanically triggered instantaneous safety clamps, and optical / magnetic scales have replaced traditional leveling switches, speed switches, limit switches, and limit switches. However, the ability to verify the reliable operation of electronically triggered instantaneous safety clamps and optical / magnetic scales has become an increasingly important issue. Summary of the Invention

[0003] The purpose of the present invention is to provide a reliable action detection system for a vertical elevator electronic safety clamp, a grating scale and a magnetic scale.

[0004] The technical solutions of the present invention are as follows:

[0005] A vertical elevator electronic safety clamp and grating scale, magnetic scale reliable action detection system, including an electronically triggered instantaneous safety clamp device, a grating scale / magnetic scale, a grating scale reader / magnetic scale reader, an encoder, and a main control board;

[0006] The electronically triggered instantaneous safety clamp device is triggered when the grating scale reader / magnetic scale reader or the main control board detects that the elevator running speed reaches the mechanical action speed of the speed limiter;

[0007] The optical scale / magnetic scale runs through the elevator shaft, and is used for the optical scale reader / magnetic scale reader to detect the running speed and position of the elevator in real time;

[0008] The encoder is installed on the traction machine and is used by the main control board to detect the running speed and position of the elevator in real time;

[0009] The grating scale reader / magnetic scale reader and the main control board are electrically connected to the electronically triggered instantaneous safety clamp device respectively, and the grating scale reader / magnetic scale reader and the main control board are electrically connected to form an electrical safety circuit;

[0010] The grating scale reader / magnetic scale reader is used to read the position information of the grating scale / magnetic scale and detect the running speed and position of the elevator in real time. When it is detected that the running speed of the elevator reaches the electrical action speed of the speed limiter, the electrical safety circuit is cut off to stop the elevator. When it is detected that the running speed of the elevator reaches the mechanical action speed of the speed limiter, the electronic trigger instantaneous safety clamp device is triggered to operate.

[0011] The main control board is used to read the position information of the encoder and detect the running speed and position of the elevator in real time. When it is detected that the running speed of the elevator reaches the electrical action speed of the speed limiter, the electrical safety circuit is cut off to stop the elevator. When it is detected that the running speed of the elevator reaches the mechanical action speed of the speed limiter, the electronic trigger instantaneous safety clamp device is triggered to operate.

[0012] Furthermore, the optical scale reader / magnetic scale reader includes relay K1, relay K2, relay K3, relay switch Y1, relay switch Y2, relay switch Y3, relay action indicator EM1 and relay action indicator EM2; the main control board includes relay K4, relay K5, relay K6, relay switch Y4, relay switch Y5, relay switch Y6, relay action indicator EM3 and relay action indicator EM4;

[0013] The coils of the relay K1, relay K2, and relay K3 are connected in parallel to form a first relay parallel circuit, the coil of the relay K1 is connected in series to the relay switch Y1, the coil of the relay K2 is connected in series to the relay switch Y2, and the coil of the relay K3 is connected in series to the relay switch Y3;

[0014] The coils of the relay K4, relay K5 and relay K6 are connected in parallel to form a second relay parallel circuit, the coil of the relay K4 is connected in series with the relay switch Y4, the coil of the relay K5 is connected in series with the relay switch Y5, and the coil of the relay K6 is connected in series with the relay switch Y6;

[0015] The first relay parallel circuit is connected to the second relay parallel circuit to form an electrical safety circuit, the relay action indicator light EM1 and the normally open contact of the relay K2 are connected in series to the first relay parallel circuit, the relay action indicator light EM2 and the normally open contact of the relay K3 are connected in series to the first relay parallel circuit, the relay action indicator light EM3 and the normally open contact of the relay K5 are connected in series to the second relay parallel circuit, and the relay action indicator light EM4 and the normally open contact of the relay K6 are connected in series to the second relay parallel circuit.

[0016] Furthermore, the electronically triggered instantaneous safety clamp device includes a left electronic safety clamp, a right electronic safety clamp and a safety clamp power box, the left electronic safety clamp includes a first electromagnet and an electronic safety clamp normally closed switch KXJ1, the right electronic safety clamp includes a second electromagnet and an electronic safety clamp normally closed switch KXJ2, the safety clamp power box includes a first solenoid valve, a first trigger switch, a second solenoid valve and a second trigger switch, the first solenoid valve, the first trigger switch, the second solenoid valve and the second trigger switch are each provided with two ports, the two ends of the first electromagnet are respectively connected to the two ports of the first solenoid valve, the two ends of the second electromagnet are respectively connected to the two ports of the second solenoid valve, the first port of the first solenoid valve is connected to the first port of the second solenoid valve, the second port of the first solenoid valve is connected to the first port of the first trigger switch, the second port of the second solenoid valve is connected to the second port of the second trigger switch, and the second port of the first trigger switch is connected to the second port of the second trigger switch;

[0017] One end of the normally open contact of the relay K1 is connected to one end of the normally open contact of the relay K4, the other end of the normally open contact of the relay K1 is connected in series with the electronic safety clamp normally closed switch KXJ2 and the electronic safety clamp normally closed switch KXJ1, one end of the normally closed contact of the relay K2 is connected to one end of the normally closed contact of the relay K5, the other end of the normally closed contact of the relay K2 is connected to the second port of the first trigger switch, the other end of the normally closed contact of the relay K5 is connected to the first port of the first trigger switch, one end of the normally closed contact of the relay K3 is connected to one end of the normally closed contact of the relay K6, the other end of the normally closed contact of the relay K3 is connected to the second port of the second trigger switch, and the other end of the normally closed contact of the relay K6 is connected to the first port of the second trigger switch.

[0018] When the grating scale reader / magnetic scale reader detects that the elevator speed reaches the electrical action speed of the speed limiter, it triggers relay K1 to cut off the electrical safety circuit and stop the elevator; when the main control board detects that the elevator speed reaches the electrical action speed of the speed limiter, it triggers relay K4 to cut off the electrical safety circuit and stop the elevator.

[0019] When the grating scale reader / magnetic scale reader detects that the elevator running speed reaches the mechanical action speed of the speed limiter, it triggers relays K2 and K3 to operate, thereby causing the left and right electronic safety clamps to operate; when the main control board detects that the elevator running speed reaches the mechanical action speed of the speed limiter, it triggers relays K5 and K6 to operate, thereby causing the left and right electronic safety clamps to operate.

[0020] The system automatically triggers the detection function when the elevator is completely powered off or powered on, or when the elevator has been running for 24 hours.

[0021] Compared with the existing technology, the beneficial effects of the present invention are: the system adopts a main control board + encoder, grating scale / magnetic scale + reader, dual-channel detection, independent operation, automatic detection on and off power, 24h standby automatic detection and manual detection, ensuring the reliable operation of the electronically triggered instantaneous safety clamp and the grating scale / magnetic scale, and providing early warning in case of abnormalities. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 Schematic diagram of the circuit of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] In order to illustrate the technical solution of the present invention, specific embodiments are provided below.

[0026] Example

[0027] The present embodiment provides a vertical elevator electronic safety clamp and grating scale, magnetic scale reliable action detection system, including an electronically triggered instantaneous safety clamp device, a grating scale / magnetic scale, a grating scale reader / magnetic scale reader, an encoder, and a main control board. The electronically triggered instantaneous safety clamp device is triggered to act when the grating scale reader / magnetic scale reader or the main control board detects that the elevator running speed reaches the mechanical action speed of the speed limiter; the grating scale / magnetic scale runs through the elevator shaft, and is used for the grating scale reader / magnetic scale reader to detect the running speed and position of the elevator in real time; the encoder is installed on the traction machine, and is used for the main control board to detect the running speed and position of the elevator in real time; the grating scale reader / magnetic scale reader and the main control board are electrically connected to the electronically triggered instantaneous safety clamp device respectively, and the grating scale reader / magnetic scale reader is electrically connected to the main control board to form an electrical safety circuit; the grating scale reader / magnetic scale reader is used The main control board is used to read the position information of the grating scale / magnetic scale and detect the running speed and position of the elevator in real time. When it is detected that the elevator running speed reaches the electrical action speed of the speed limiter, the electrical safety circuit is cut off to stop the elevator. When it is detected that the elevator running speed reaches the mechanical action speed of the speed limiter, the electronic trigger instantaneous safety clamp device is triggered to operate. The main control board is used to read the position information of the encoder and detect the running speed and position of the elevator in real time. When it is detected that the elevator running speed reaches the electrical action speed of the speed limiter, the electrical safety circuit is cut off to stop the elevator. When it is detected that the elevator running speed reaches the mechanical action speed of the speed limiter, the electronic trigger instantaneous safety clamp device is triggered to operate.

[0028] like Figure 1As shown, the optical scale reader / magnetic scale reader includes relay K1, relay K2, relay K3, relay switch Y1, relay switch Y2, relay switch Y3, relay operation indicator light EM1, and relay operation indicator light EM2. The main control board includes relay K4, relay K5, relay K6, relay switch Y4, relay switch Y5, relay switch Y6, relay operation indicator light EM3, and relay operation indicator light EM4. The coils of relays K1, K2, and K3 are connected in parallel to form a first relay parallel circuit. The coil of relay K1 is connected in series with relay switch Y1, the coil of relay K2 is connected in series with relay switch Y2, and the coil of relay K3 is connected in series with relay switch Y3. The coils of relays K4, K5, and K6 are connected in parallel to form a second relay parallel circuit. The coil of relay K4 is connected in series with relay switch Y4, the coil of relay K5 is connected in series with relay switch Y5, and the coil of relay K6 is connected in series with relay switch Y6. The first relay parallel circuit and the second relay parallel circuit are connected to form an electrical safety circuit. The relay operation indicator light EM1 and the normally open contact of relay K2 are connected in series in the first relay parallel circuit. The relay operation indicator light EM2 and the normally open contact of relay K3 are connected in series in the first relay parallel circuit. The relay operation indicator light EM3 and the normally open contact of relay K5 are connected in series in the second relay parallel circuit. The relay operation indicator light EM4 and the normally open contact of relay K6 are connected in series in the second relay parallel circuit.

[0029] The electronically triggered instantaneous safety clamp device includes a left electronic safety clamp, a right electronic safety clamp and a safety clamp power box. The left electronic safety clamp includes a first electromagnet and an electronic safety clamp normally closed switch KXJ1, the right electronic safety clamp includes a second electromagnet and an electronic safety clamp normally closed switch KXJ2, the safety clamp power box includes a first solenoid valve, a first trigger switch, a second solenoid valve and a second trigger switch, the first solenoid valve, the first trigger switch, the second solenoid valve and the second trigger switch are all provided with two ports, the two ends of the first electromagnet are respectively connected to the two ports of the first solenoid valve, the two ends of the second electromagnet are respectively connected to the two ports of the second solenoid valve, the first port of the first solenoid valve is connected to the first port of the second solenoid valve, the second port of the first solenoid valve is connected to the first port of the first trigger switch, the second port of the second solenoid valve is connected to the second port of the second trigger switch, and the second port of the first trigger switch is connected to the second port of the second trigger switch. One end of the normally open contact of relay K1 is connected to one end of the normally open contact of relay K4, the other end of the normally open contact of relay K1 is connected in series with the electronic safety clamp normally closed switch KXJ2 and the electronic safety clamp normally closed switch KXJ1, one end of the normally closed contact of relay K2 is connected to one end of the normally closed contact of relay K5, the other end of the normally closed contact of relay K2 is connected to the second port of the first trigger switch, the other end of the normally closed contact of relay K5 is connected to the first port of the first trigger switch, one end of the normally closed contact of relay K3 is connected to one end of the normally closed contact of relay K6, the other end of the normally closed contact of relay K3 is connected to the second port of the second trigger switch, and the other end of the normally closed contact of relay K6 is connected to the first port of the second trigger switch.

[0030] Working principle: When the grating scale reader / magnetic scale reader detects that the elevator running speed reaches the electrical action speed of the speed limiter, it triggers relay K1 to operate, cuts off the electrical safety circuit and stops the elevator; when the main control board detects that the elevator running speed reaches the electrical action speed of the speed limiter, it triggers relay K4 to operate, cuts off the electrical safety circuit and stops the elevator; when the grating scale reader / magnetic scale reader detects that the elevator running speed reaches the mechanical action speed of the speed limiter, it triggers relays K2 and K3 to operate, thereby operating the left electronic safety clamp and the right electronic safety clamp; when the main control board detects that the elevator running speed reaches the mechanical action speed of the speed limiter, it triggers relays K5 and K6 to operate, thereby operating the left electronic safety clamp and the right electronic safety clamp.

[0031] The system automatically triggers the detection function when the elevator is completely powered off and on or when the elevator has been running for 24 hours (the time can be changed according to actual site needs). If manual detection is required, the main control board parameters can be changed to implement manual detection.

[0032] After the detection function is triggered, relay switch Y4 closes, relay switch Y5 opens, relay switch Y6 opens, relay switch Y1 closes, relay switch Y2 opens, and relay switch Y3 opens. The electrical safety circuit remains open, the electronic safety clamp does not activate, and the elevator is in normal operation. After 1 second, relay switch Y4 opens, triggering relay K4 to open, and relay K4's normally open contacts to open. 1 second later, relay switch Y4 closes, triggering relay K4 to close, and relay K4's normally open contacts to close. If the main control board detects that the electrical safety circuit has changed from open to open and then back to open, relay K4 is operating normally. Otherwise, relay K4 is malfunctioning, the main control board reports fault K20-101 (manual reset), and the elevator stops. If relay K4 is operating normally, the next test proceeds. 1 second later, relay switch Y1 opens, triggering relay K1 to open, and relay K1's normally open contacts to open. 1 second later, relay switch Y1 closes, triggering relay K1 to close, and relay K1's normally open contacts to close. If the main control board detects that the electrical safety circuit has switched from open to open and then back to open, relay K1 is operating normally. Otherwise, relay K1 is malfunctioning, the main control board reports a K20-102 fault (manual reset), and the elevator stops. If relay K1 is operating normally, the next test will proceed. After 1 second, relay switch Y5 will close, triggering relay K5 to energize. Relay K5's normally closed contacts will open, triggering the left electronic safety clamp to activate. The electronic safety clamp's normally closed switch KXJ1 will open, causing relay K5 to activate, and the relay operation indicator EM3 will illuminate steadily. After 3 seconds, relay switch Y5 will open, triggering relay K5 to open, causing relay K5's normally closed contacts to close, resetting the left electronic safety clamp. The electronic safety clamp's normally closed switch KXJ1 will close, causing relay K5 to activate, and the relay operation indicator EM3 will turn off. If the main control board detects that relay K5's activation and relay operation indicator EM3 are abnormal, the main control board reports a K20-103 fault (manual reset), and the elevator stops. If the main control board detects that relay K5 is actuating, the relay operation indicator EM3 is normal, and the electrical safety circuit changes from open to open and then back to open, the left electronic safety clamp is operating normally. Otherwise, the left electronic safety clamp is malfunctioning, the main control board reports fault K20-104 (manual reset), and the elevator stops. If the left electronic safety clamp is operating normally, the next test will proceed. After 1 second, relay switch Y6 will close, triggering relay K6 to energize. Relay K6's normally closed contacts will open, triggering the right electronic safety clamp to actuate. The electronic safety clamp's normally closed switch KXJ2 will open, causing relay K6 to actuate, and the relay operation indicator EM4 will illuminate steadily. After 3 seconds, relay switch Y6 will open, triggering relay K6 to open, and relay K6's normally closed contacts will close. The right electronic safety clamp is reset, the electronic safety clamp's normally closed switch KXJ2 will close, and relay K6 will actuate, causing the relay operation indicator EM4 to turn off.If the main control board detects an abnormality in relay K6 operation and relay operation indicator EM4, it reports a K20-105 fault (manual reset) and the elevator stops. If the main control board detects normal relay K6 operation, relay operation indicator EM4, and the electrical safety circuit changes from open to open and then back to open, the right electronic safety clamp is operating normally. Otherwise, the right electronic safety clamp is malfunctioning, and the main control board reports a K20-106 fault (manual reset) and the elevator stops. If the right electronic safety clamp is operating normally, the next test is performed. After 1 second, relay switch Y2 closes, triggering relay K2 to energize. Relay K2's normally closed contacts open, triggering the left electronic safety clamp to operate. The normally closed switch KXJ1 of the electronic safety clamp opens, causing relay K2 to operate and the relay operation indicator EM1 to illuminate steadily. After 3 seconds, relay switch Y2 opens, triggering relay K2 to open, triggering relay K2's normally closed contacts to close, resetting the left electronic safety clamp, closing the normally closed switch KXJ1 of the electronic safety clamp, and turning off relay K2 and the relay operation indicator EM1. If the optical / magnetic scale reader detects an abnormality in the actuation of relay K2 and the relay actuation indicator EM1, the main control board reports fault K20-107 (manual reset), and the elevator stops. If the optical / magnetic scale reader detects normal actuation of relay K2 and the relay actuation indicator EM1, and the electrical safety circuit changes from open to open and then back to open, the left electronic safety clamp is operating normally. Otherwise, the left electronic safety clamp is malfunctioning, the main control board reports fault K20-108 (manual reset), and the elevator stops. If the left electronic safety clamp is operating normally, the next test will proceed. After 1 second, relay switch Y3 will close, triggering relay K3 to energize. Relay K3's normally closed contact will open, triggering the actuation of the right electronic safety clamp. The electronic safety clamp's normally closed switch KXJ2 will open, causing relay K3 to actuate and the relay actuation indicator EM2 to illuminate steadily. After 3 seconds, relay switch Y3 opens, triggering relay K3 to open. Relay K3's normally closed contacts close, the right electronic safety clamp is reset, and the electronic safety clamp's normally closed switch KXJ2 closes. Relay K3 actuates, and the relay actuation indicator EM2 turns off. When the optical scale reader / magnetic scale reader detects an abnormality in relay K3 actuation and relay actuation indicator EM2, the main control board reports a K20-109 fault (manual reset), and the elevator stops. When the optical scale reader / magnetic scale reader detects that relay K3 actuates, relay actuation indicator EM2 is normal, and the electrical safety circuit changes from open to open and then back to open, the right electronic safety clamp is operating normally. Otherwise, the right electronic safety clamp is operating abnormally, the main control board reports a K20-110 fault (manual reset), and the elevator stops.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reliable motion detection system for a vertical elevator electronic safety clamp and a grating scale or a magnetic scale, characterized by: It includes an electronically triggered instantaneous safety clamp device, a grating scale / magnetic scale, a grating scale reader / magnetic scale reader, an encoder, and a main control board; the electronically triggered instantaneous safety clamp device is triggered when the grating scale reader / magnetic scale reader or the main control board detects that the elevator running speed reaches the mechanical action speed of the speed limiter; the grating scale / magnetic scale runs through the elevator shaft and is used for the grating scale reader / magnetic scale reader to detect the running speed and position of the elevator in real time; the encoder is installed on the traction machine and is used for the main control board to detect the running speed and position of the elevator in real time; the grating scale reader / magnetic scale reader and the main control board are electrically connected to the electronically triggered instantaneous safety clamp device respectively, and the grating scale reader / magnetic scale reader is electrically connected to the main control board to form an electrical Air safety circuit; the grating scale reader / magnetic scale reader is used to read the position information of the grating scale / magnetic scale and detect the running speed and position of the elevator in real time. When it is detected that the elevator running speed reaches the electrical action speed of the speed limiter, the electrical safety circuit is cut off to stop the elevator. When it is detected that the elevator running speed reaches the mechanical action speed of the speed limiter, the electronic trigger instantaneous safety clamp device is triggered to operate; the main control board is used to read the position information of the encoder and detect the running speed and position of the elevator in real time. When it is detected that the elevator running speed reaches the electrical action speed of the speed limiter, the electrical safety circuit is cut off to stop the elevator. When it is detected that the elevator running speed reaches the mechanical action speed of the speed limiter, the electronic trigger instantaneous safety clamp device is triggered to operate; The grating scale reader / magnetic scale reader includes relay K1, relay K2, relay K3, relay switch Y1, relay switch Y2, relay switch Y3, relay action indicator light EM1 and relay action indicator light EM2, and the main control board includes relay K4, relay K5, relay K6, relay switch Y4, relay switch Y5, relay switch Y6, relay action indicator light EM3 and relay action indicator light EM4; the coils of the relay K1, relay K2 and relay K3 are connected in parallel to form a first relay parallel circuit, the coil of the relay K1 is connected in series with the relay switch Y1, the coil of the relay K2 is connected in series with the relay switch Y2, and the coil of the relay K3 is connected in series with the relay switch Y3; the relays K4, relay K5 and relay K6 The coils of the relay K4 are connected in parallel to form a second relay parallel circuit, the coil of the relay K5 is connected in series to the relay switch Y4, the coil of the relay K5 is connected in series to the relay switch Y5, and the coil of the relay K6 is connected in series to the relay switch Y6; the first relay parallel circuit and the second relay parallel circuit are connected to form an electrical safety circuit, the relay action indicator light EM1 and the normally open contact of the relay K2 are connected in series to the first relay parallel circuit, the relay action indicator light EM2 and the normally open contact of the relay K3 are connected in series to the first relay parallel circuit, the relay action indicator light EM3 and the normally open contact of the relay K5 are connected in series to the second relay parallel circuit, and the relay action indicator light EM4 and the normally open contact of the relay K6 are connected in series to the second relay parallel circuit; The electronically triggered instantaneous safety clamp device includes a left electronic safety clamp, a right electronic safety clamp and a safety clamp power box, the left electronic safety clamp includes a first electromagnet and an electronic safety clamp normally closed switch KXJ1, the right electronic safety clamp includes a second electromagnet and an electronic safety clamp normally closed switch KXJ2, the safety clamp power box includes a first solenoid valve, a first trigger switch, a second solenoid valve and a second trigger switch, the first solenoid valve, the first trigger switch, the second solenoid valve and the second trigger switch are all provided with two ports, the two ends of the first electromagnet are respectively connected to the two ports of the first solenoid valve, the two ends of the second electromagnet are respectively connected to the two ports of the second solenoid valve, the first port of the first solenoid valve is connected to the first port of the second solenoid valve, the second port of the first solenoid valve is connected to the first port of the first trigger switch, and the second port of the second solenoid valve is connected to the second port of the second trigger switch. The second port of the first trigger switch is connected to the second port of the second trigger switch; one end of the normally open contact of the relay K1 is connected to one end of the normally open contact of the relay K4, the other end of the normally open contact of the relay K1 is connected in series with the electronic safety clamp normally closed switch KXJ2 and the electronic safety clamp normally closed switch KXJ1, one end of the normally closed contact of the relay K2 is connected to one end of the normally closed contact of the relay K5, the other end of the normally closed contact of the relay K2 is connected to the second port of the first trigger switch, the other end of the normally closed contact of the relay K5 is connected to the first port of the first trigger switch, one end of the normally closed contact of the relay K3 is connected to one end of the normally closed contact of the relay K6, the other end of the normally closed contact of the relay K3 is connected to the second port of the second trigger switch, and the other end of the normally closed contact of the relay K6 is connected to the first port of the second trigger switch; When the grating scale reader / magnetic scale reader detects that the elevator running speed reaches the speed limiter mechanical action speed, it triggers relays K2 and K3 to actuate the left and right electronic safety clamps; when the main control board detects that the elevator running speed reaches the speed limiter mechanical action speed, it triggers relays K5 and K6 to actuate the left and right electronic safety clamps. When the grating scale reader / magnetic scale reader detects that the elevator speed reaches the electrical action speed of the speed limiter, it triggers relay K1 to cut off the electrical safety circuit and stop the elevator; when the main control board detects that the elevator speed reaches the electrical action speed of the speed limiter, it triggers relay K4 to cut off the electrical safety circuit and stop the elevator. The system automatically triggers the detection function when the elevator is completely powered off or powered on, or when the elevator has been running for 24 hours; If manual detection is required, the main control board parameters can be changed to implement the manual detection function.

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