Elevator electrical safety protection device and early warning system

Abstract

The invention discloses an elevator electrical safety protection device and an early warning system, and relates to the field of elevator safety, the elevator electrical safety protection device comprises an elevator shaft, an internal elevator car, a protection mechanism and a controller, an elevator opening is formed in one side of the elevator shaft, the controller is arranged at the top of the elevator shaft, and the controller is connected with the elevator car through a traction machine; a protection shell is fixed to the bottom of the elevator car through screws, the protection mechanism is composed of an anti-slip assembly, a moving assembly and an infrared sensor, the anti-slip assembly is arranged in the protection shell, limiting grooves are formed in the positions, below the elevator opening, of the two sides of the inner wall of the elevator shaft, and first mounting grooves are formed in the positions, below the limiting grooves, of the inner wall of the elevator shaft; second mounting grooves are formed in the positions, above the elevator opening, of the inner walls of the two sides of the elevator shaft correspondingly, infrared sensors are mounted in the first mounting grooves and the second mounting grooves correspondingly, the problem of the leveling difference of the elevator car can be detected and pre-warned, and the situation that the elevator outer door cannot be opened due to the leveling difference is reduced.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of elevator safety, and specifically relates to an elevator electrical safety protection device and an early warning system. Background Art

[0002] Elevators are inseparable from people's daily work and life. With the increasing use of elevators, elevators play an extremely important role in the national economy and people's daily lives.

[0003] The elevator safety protection device described in the prior art includes a pedal device and a controller. The pedal device includes a pedal, a proximity switch, a sensor, an induction head, a compression spring, and an electromagnetic bolt; the pedal is installed on the floor in front of the elevator door, the floor is provided with a groove, the pedal is arranged in the groove, the compression spring is arranged between the pedal and the bottom of the groove, a limit rubber block is arranged at the bottom of the groove, the proximity switch is arranged in the groove, and a lock bolt hole is arranged in the lower end face of the elevator outer door; the sensor is installed on the car passage, the induction head is arranged on the elevator car, and the controller is connected to the proximity switch, the sensor, the electromagnetic bolt, and the controller of the elevator car through a control line; Although the above technology can lock the elevator outer door when the elevator does not reach the floor, so that the elevator outer door cannot be opened, preventing people from falling into the elevator car. However, as the service life of the elevator increases, when the elevator stops at the floor, there will be a leveling difference, that is, the vertical distance deviation between the elevator car and the floor when it reaches the destination floor, which easily causes the deviation of the positions of the sensor and the induction head, resulting in the elevator outer door not being able to be opened. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide an elevator electrical safety protection device and an early warning system to solve the technical problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: An elevator electrical safety protection device includes an elevator shaft, an elevator car inside, a protection mechanism, and a controller. An elevator opening is provided on one side of the elevator shaft. The controller is arranged on the top of the elevator shaft. The controller is connected to the elevator car through a traction machine. A protective shell is fixed to the bottom of the elevator car by screws. The protection mechanism is composed of an anti-slip component, a moving component, and an infrared sensor. The anti-slip component is arranged in the protective shell. Limiting grooves are provided on both sides of the inner wall of the elevator shaft below the elevator opening. A first installation groove is provided on the inner wall of the elevator shaft below the limiting groove. Second installation grooves are provided on both inner walls of the elevator shaft above the elevator opening. Infrared sensors are installed in each first installation groove and second installation groove; The moving component is arranged on the inner wall of the elevator shaft for closing the limiting groove, the first installation groove, and the second installation groove. The anti-slip component is used to cooperate with the limiting groove when the elevator car stops at the elevator opening.

[0006] Specifically, infrared transmitters are embedded in the outer walls on both sides of the elevator car. The infrared sensors are used in conjunction with the infrared transmitters, and the infrared sensors are signal-connected to the controller.

[0007] Specifically, the anti-slip component includes a first electric telescopic rod and two symmetric limit insertion plates. The first electric telescopic rod is arranged between the two limit insertion plates. The end faces of the two limit insertion plates penetrate through the side wall of the protective shell and extend to the outside. The first electric telescopic rod is fixedly connected to the inner wall of the protective shell by screws. A push plate is installed on the telescopic end of the first electric telescopic rod by screws. Right-angled trapezoidal grooves are formed on one side of the two limit insertion plates close to the first electric telescopic rod, and both ends of the push plate are located in the right-angled trapezoidal grooves.

[0008] Specifically, inclined surfaces are provided at both ends of the push plate. Both inclined surfaces are in contact with the hypotenuse of the right-angled trapezoidal groove and are slidably connected. A tension spring is provided beside the push plate far from the first electric telescopic rod. Both ends of the tension spring are fixedly connected to the outer walls of the two limit insertion plates.

[0009] Specifically, the surfaces of the two limit insertion plates far from the first electric telescopic rod are matched with the limit grooves. Pressure sensors are installed in both limit grooves. Three balls are embedded in the surfaces of the two limit insertion plates matched with the limit grooves. The pressure sensors are signal-connected to the controller.

[0010] Specifically, chambers are formed in the well wall of the elevator shaft above the first installation groove and the second installation groove. Moving grooves are formed above each chamber, and the limit grooves are communicated with the moving grooves.

[0011] Specifically, the moving component includes a second electric telescopic rod. The second electric telescopic rod is installed in the chamber by screws. A moving block is slidably arranged in the moving groove. The telescopic end of the second electric telescopic rod passes through the chamber and is located in the moving groove and is fixedly connected to the moving block by screws. A first closing plate is welded to the end face of the moving block. The first closing plate is in contact with and slidably connected to the well wall of the elevator shaft. The length and height of the first closing plate are both greater than the length and height of the limit groove. Connecting rods are fixed to both side walls of the first closing plate. The two connecting rods are arranged in an L shape. A second closing plate is provided below the first closing plate. The other ends of the two connecting rods are fixedly connected to both side walls of the second closing plate.

[0012] Specifically, in this technical solution, the length and height of the second closing plate are both greater than those of the first installation groove, the thicknesses of the first closing plate and the second closing plate are both smaller than the gap between the elevator car and the elevator shaft, and a third closing plate is slidably arranged at the inner wall of the elevator shaft at the second installation groove. U-shaped rods are welded to both side walls of the third closing plate, the outer wall of the top of the U-shaped rod is fixedly connected to the moving block, and the cross-sections of the first closing plate, the second closing plate, and the third closing plate are all arranged in an isosceles trapezoid shape.

[0013] According to the above technical solution, an early warning system for an elevator electrical safety protection device will also be provided. The controller is provided with a main control module, a signal receiving module, and an early warning module. The main control module is used to start the moving component after the elevator button on the floor is pressed, exposing the limit groove, the first installation groove, and the second installation groove. The signal receiving module is used to receive the signal sent when the infrared sensor detects the passing infrared transmitter, and then start the anti-slip component through the main control module. The early warning module is used to detect the insertion situation of the limit groove, and then give an alarm for the leveling difference.

[0014] Specifically, in this technical solution, the early warning module includes a pressure feedback unit and a voice prompt unit. The voice prompt unit is installed in the elevator car. The pressure feedback unit is used to receive the signal sent by the pressure sensor. When the signal is received, it means that there is no leveling difference. When the signal is not received, it means that the limit insertion plate is not inserted into the limit groove, and the elevator car has a leveling difference. The voice prompt unit is used to give a voice prompt when the elevator car has a leveling difference to remind the user to pay attention.

[0015] In summary, the present invention mainly has the following beneficial effects: By pressing the elevator button on the floor, the main control module starts the second electric telescopic rod in the moving component, drives the moving block to move along the moving groove, and then makes the first closing plate, the second closing plate, and the third closing plate move, exposing the limit groove, the first installation groove, and the second installation groove. Then the main control module controls the elevator car to move. When the infrared transmitters on both sides of the elevator car pass by the infrared sensor, the infrared sensor sends a signal to the signal receiving module, and starts the first driving telescopic rod of the anti-slip component. By pushing the moving of the pushing plate in the right-angled trapezoidal groove, the limit insertion plate is pushed to move to both sides. Until the elevator car stops at the elevator entrance, the two limit insertion plates will be inserted into the corresponding limit grooves, applying pressure to the pressure sensor. After the pressure sensor detects the pressure, it sends a signal to the pressure feedback unit. Therefore, this application can detect and give an early warning of the leveling difference problem of the elevator car, reduce the situation that the elevator outer door cannot be opened due to the leveling difference, and at the same time, the limit insertion plate inserted into the limit groove can also play a certain supporting role for the elevator car, improving the safety and reliability of the elevator car. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall elevator shaft of the present invention; Figure 2 It is a sectional view of the elevator shaft of the present invention; Figure 3 of the present invention Figure 2 front view structure diagram; Figure 4 It is an enlarged view of part A of the present invention; Figure 5 It is an enlarged view of part B of the present invention; Figure 6 It is a schematic diagram of the inner wall of the elevator shaft of the present invention; Figure 7 It is a structure diagram of the moving component of the present invention; Figure 8 It is a sectional structure diagram of the anti-slip component of the present invention; Figure 9 It is a block diagram of the warning system of the controller of the present invention.

[0017] Description of the drawings: 1. Elevator shaft; 101. Elevator opening; 102. Limit groove; 103. Moving groove; 1031. Chamber; 104. First installation groove; 105. Second installation groove; 2. Elevator car; 201. Infrared emitter; 202. Protective shell; 3. Protection mechanism; 4. Anti-slip component; 401. First electric telescopic rod; 402. Limit insertion plate; 4021. Right-angled trapezoidal groove; 403. Ball; 404. Push plate; 4041. Inclined plane; 405. Tensile spring; 5. Moving component; 501. Second electric telescopic rod; 502. Moving block; 503. First closing plate; 504. Connecting rod; 505. Second closing plate; 506. U-shaped rod; 507. Third closing plate; 6. Pressure sensor; 7. Infrared sensor; 8. Controller; 801. Main control module; 802. Signal receiving module; 803. Warning module; 8031. Pressure feedback unit; 804. Voice prompt unit. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0019] Next, the embodiments of the present invention will be described according to the overall structure of the present invention.

[0020] In this embodiment, please refer to Figures 1 - 6As shown in the figure, an elevator electrical safety protection device includes an elevator shaft 1, an elevator car 2 inside, a protection mechanism 3, and a controller 8. An elevator opening 101 is provided on one side of the elevator shaft 1. The controller 8 is arranged at the top of the elevator shaft 1. The controller 8 is connected to the elevator car 2 through a traction machine. A protective shell 202 is fixed to the bottom of the elevator car 2 by screws. The protection mechanism 3 consists of an anti-slip component 4, a moving component 5, and an infrared sensor 7. The anti-slip component 4 is arranged in the protective shell 202. Limiting grooves 102 are provided on both sides of the inner wall of the elevator shaft 1 below the elevator opening 101. A first installation groove 104 is provided on the inner wall of the elevator shaft 1 below the limiting groove 102. Second installation grooves 105 are provided on both sides of the inner wall of the elevator shaft 1 above the elevator opening 101. Infrared sensors 7 are installed in each of the first installation groove 104 and the second installation groove 105. Chambers 1031 are provided on the shaft wall of the elevator shaft 1 above the first installation groove 104 and the second installation groove 105. A moving groove 103 is provided above each chamber 1031. The limiting groove 102 communicates with the moving groove 103; The moving component 5 is arranged on the inner wall of the elevator shaft 1 for closing the limiting groove 102, the first installation groove 104, and the second installation groove 105. The anti-slip component 4 is used to cooperate with the limiting groove 102 when the elevator car 2 stops at the elevator opening 101. Infrared transmitters 201 are embedded in both outer walls of the elevator car 2. The infrared sensors 7 are used in cooperation with the infrared transmitters 201. The infrared sensors 7 are signal-connected to the controller 8.

[0021] When a user uses the elevator car 2, press the elevator button on the corresponding floor. The main control module 801 set in the controller 8 starts the moving component 5 on the corresponding floor, so that the limiting groove 102, the first installation groove 104, and the second installation groove 105 on the inner wall of the elevator shaft 1 are exposed, canceling the shielding of the infrared sensors 7 in the first installation groove 104 and the second installation groove 105. At this time, the main control module 801 controls the traction wheel to drive the elevator car 2 to move to the corresponding floor. When the elevator car 2 passes by the infrared sensor 7, it will receive the infrared light emitted by the infrared transmitter 201. Then the infrared sensor 7 sends a signal to the signal receiving module 802 in the controller 8, starting the anti-slip component 4 at the bottom of the elevator car 2 to unfold the actuator (the limiting plug 402 in the text). When the elevator car 2 stops at the elevator opening 101 on the floor, the limiting plug 402 will be inserted into the limiting groove 102, applying pressure to the pressure sensor 6. After detecting the pressure, the pressure sensor 6 will send a signal to the pressure feedback unit 8031 in the controller 8 to confirm that there is no problem with the leveling difference of the elevator car 2, reducing the situation that the outer door of the elevator car cannot be opened due to the leveling difference. At the same time, the limiting plug 402 inserted into the limiting groove 102 can also play a certain supporting role for the elevator car 2, improving the safety and reliability of the elevator car 2; Among them, a light curtain protection is also provided in the anti-slip component 4. When the elevator car 2 stops, the limit insertion plate 402 does not insert into the limit groove 102 but contacts the inner wall of the elevator shaft 1. At this time, under the action of the light curtain protection, the anti-slip component 4 stops working, and the pressure sensor 6 does not detect pressure and sends a signal to the pressure feedback unit 8031. Then, the pressure feedback unit 8031 will send a signal to start the voice prompt unit 804, and the voice prompt unit 804 will issue a voice prompt to remind the user that there is a leveling difference and the elevator outer door cannot be opened to avoid danger to the user.

[0022] Please refer to Figure 3 、 Figure 4 、 Figure 5 and Figure 7 As shown in, the moving component 5 includes a second electric telescopic rod 501. The second electric telescopic rod 501 is installed in the chamber 1031 by screws. A moving block 502 is slidably arranged in the moving groove 103. The telescopic end of the second electric telescopic rod 501 passes through the chamber 1031 and is located in the moving groove 103 and is fixedly connected to the moving block 502 by screws. A first closing plate 503 is welded to the end face of the moving block 502. The first closing plate 503 contacts and is slidably connected to the inner wall of the elevator shaft 1. The length and height of the first closing plate 503 are both greater than the length and height of the limit groove 102. Connecting rods 504 are fixed to both side walls of the first closing plate 503. The two connecting rods 504 are arranged in an L shape. A second closing plate 505 is provided below the first closing plate 503. The other ends of the two connecting rods 504 are fixedly connected to both side walls of the second closing plate 505. The length and height of the second closing plate 505 are both greater than the length and height of the first installation groove 104. The thicknesses of the first closing plate 503 and the second closing plate 505 are both smaller than the gap between the elevator car 2 and the elevator shaft 1. A third closing plate 507 is slidably arranged on the inner wall of the elevator shaft 1 at the second installation groove 105. U-shaped rods 506 are welded to both side walls of the third closing plate 507. The outer wall of the top of the U-shaped rod 506 is fixedly connected to the moving block 502. The cross-sections of the first closing plate 503, the second closing plate 505, and the third closing plate 507 are all isosceles trapezoid-shaped.

[0023] A plurality of second electric telescopic rods 501 in the moving component 5 operate, and their telescopic ends drive the connecting moving blocks 502 to move, so that the plurality of moving blocks 502 move along the moving grooves 103 respectively. Among them, the moving block 502 located above the elevator entrance 101 moves upward along the moving groove 103, and drives the third closing plate 507 to move through the U-shaped rod 506. The moving third closing plate 507 exposes the second installation groove 105. The moving block 502 located below the elevator entrance 101 moves downward along the moving groove 103 and drives the first closing plate 503 to move. The first closing plate 503 drives the second closing plate 505 to move through the connecting rod 504. The moving first closing plate 503 and second closing plate 505 expose the limiting groove 102 and the first installation groove 104 respectively. Furthermore, the infrared sensors 7 above and below this floor facilitate the detection of the descending elevator car 2 and the ascending elevator car 2.

[0024] Please refer to Figure 3 and Figure 8 As shown, the anti-slip component 4 includes a first electric telescopic rod 401 and two symmetric limiting plug plates 402. The first electric telescopic rod 401 is arranged between the two limiting plug plates 402. The end faces of the two limiting plug plates 402 penetrate through the side wall of the protective shell 202 and extend to the outside. The first electric telescopic rod 401 is fixedly connected to the inner wall of the protective shell 202 by screws. A push plate 404 is installed on the telescopic end of the first electric telescopic rod 401 by screws. Right-angled trapezoidal grooves 4021 are formed on one side of the two limiting plug plates 402 close to the first electric telescopic rod 401. Both ends of the push plate 404 are located in the right-angled trapezoidal grooves 4021. Both ends of the push plate 404 are provided with inclined surfaces 4041. Both inclined surfaces 4041 are in contact with the hypotenuse of the right-angled trapezoidal groove 4021 and are slidably connected. A tension spring 405 is arranged on the side of the push plate 404 away from the first electric telescopic rod 401. Both ends of the tension spring 405 are fixedly connected to the outer walls of the two limiting plug plates 402; One side of the two limiting plug plates 402 away from the first electric telescopic rod 401 is matched with the limiting groove 102. Pressure sensors 6 are installed in both grooves of the two limiting grooves 102. Three balls 403 are embedded on one side of the two limiting plug plates 402 matched with the limiting groove 102. The pressure sensor 6 is signal-connected to the controller 8.

[0025] The first electric telescopic rod 401 in the anti-sliding assembly 4 operates, and its telescopic end pushes the push plate 404. The push plate 404 moves along the hypotenuse of the right trapezoidal groove 4021 through the inclined surface 4041, causing the limiting insertion plates 402 on both sides to move slowly. The moving limiting insertion plates 402 pull the tension spring 405 and drive the ball 403 at the end to move. Until the elevator car 2 stops at the elevator entrance 101, the limiting insertion plate 402 continues to move and drives the ball 403 to insert into the limiting groove 102. After the pressure sensor 6 detects the pressure brought by the ball 403, it is sent to the pressure feedback unit 8031.

[0026] Please refer to Figure 1 , Figure 2 and Figure 9 As shown, according to the above embodiments, a warning system for an elevator electrical safety protection device will also be provided. The controller 8 is provided with a main control module 801, a signal receiving module 802, and a warning module 803. The main control module 801 is used to start the moving assembly 5 after the elevator button on the floor is pressed, exposing the limiting groove 102, the first installation groove 104, and the second installation groove 105. The signal receiving module 802 is used to receive the signal sent when the infrared sensor 7 detects the passing infrared transmitter 201, and starts the anti-sliding assembly 4 through the main control module 801. The warning module 803 is used to detect the insertion situation of the limiting groove 102, and then alarm the flatness difference; The warning module 803 includes a pressure feedback unit 8031 and a voice prompt unit 804. The voice prompt unit 804 is installed in the elevator car 2. The pressure feedback unit 8031 is used to receive the signal sent by the pressure sensor 6. When the signal is received, it means that there is no flatness difference. When the signal is not received, it means that the limiting insertion plate 402 has not inserted into the limiting groove 102, and the elevator car 2 has a flatness difference. The voice prompt unit 804 is used to issue a voice prompt when the elevator car 2 has a flatness difference to remind the user of the flatness difference.

[0027] The working principle of the present invention is: When the user presses the elevator button for a floor while using the elevator car 2, the main control module 801 in the controller 8 activates the moving component 5 corresponding to that floor. A plurality of second electric telescopic rods 501 operate, and their telescopic ends drive the connecting moving blocks 502 to move, causing the plurality of moving blocks 502 to move along the moving grooves 103 respectively. Among them, the moving block 502 located above the elevator opening 101 moves upward along the moving groove 103 and drives the third closing plate 507 to move through the U-shaped rod 506. The moving third closing plate 507 exposes the second installation groove 105. The moving block 502 located below the elevator opening 101 moves downward along the moving groove 103 and drives the first closing plate 503 to move. The first closing plate 503 drives the second closing plate 505 to move through the connecting rod 504. The moving first closing plate 503 and second closing plate 505 expose the limit groove 102 and the first installation groove 104 respectively, canceling the occlusion of the infrared sensors 7 in the first installation groove 104 and the second installation groove 105. At this time, the main control module 801 controls the traction wheel to drive the elevator car 2 to move to the corresponding floor. When the elevator car 2 passes by the infrared sensor 7, it will receive the infrared light emitted by the infrared emitter 201. Then the infrared sensor 7 sends a signal to the signal receiving module 802 in the controller 8, activating the anti-slip component 4 at the bottom of the elevator car 2. The first electric telescopic rod 401 operates, and its telescopic end pushes the push plate 404. The push plate 404 moves along the hypotenuse of the right trapezoidal groove 4021 through the inclined surface 4041, causing the limit insertion plates 402 on both sides to move slowly. The moving limit insertion plates 402 pull the tension spring 405 and drive the balls 403 at the ends to move. Until the elevator car 2 stops at the elevator opening 101, the limit insertion plates 402 continue to move and drive the balls 403 to insert into the limit groove 102 to apply pressure to the pressure sensor 6. After detecting the pressure, the pressure sensor 6 sends a signal to the pressure feedback unit 8031 in the controller 8 to confirm that there is no leveling difference in the elevator car 2. When the elevator car 2 stops, if the limit insertion plate 402 does not insert into the limit groove 102 but contacts the inner wall of the elevator shaft 1, at this time, under the action of the light curtain protection, the anti-slip component 4 stops working. The pressure sensor 6 does not detect pressure and sends a signal to the pressure feedback unit 8031. At this time, the pressure feedback unit 8031 will send a signal to activate the voice prompt unit 804, and the voice prompt unit 804 issues a voice prompt to remind the user to pay attention to the leveling difference.

[0028] Although embodiments of the present invention have been shown and described, the specific embodiments are merely explanations of the present invention and not limitations thereof. The specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions, and variations that do not make creative contributions to the embodiments as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. An elevator electrical safety protection device, comprising an elevator shaft (1), an elevator car (2) inside, a protection mechanism (3) and a controller (8), characterized in that An elevator entrance (101) is provided on one side of the elevator shaft (1); the controller (8) is arranged at the top of the elevator shaft (1); the controller (8) is connected to the elevator car (2) through a traction machine; a protective shell (202) is fixed to the bottom of the elevator car (2) by screws; the protective mechanism (3) is composed of an anti-slip component (4), a moving component (5) and an infrared sensor (7); the anti-slip component (4) is arranged in the protective shell (202); both sides of the inner wall of the elevator shaft (1) are provided with limiting grooves (102) below the elevator entrance (101); the inner wall of the elevator shaft (1) is provided with a first installation groove (104) below the limiting groove (102); both sides of the inner wall of the elevator shaft (1) are provided with a second installation groove (105) above the elevator entrance (101); and each of the first installation groove (104) and the second installation groove (105) is provided with an infrared sensor (7); The moving component (5) is arranged on the inner wall of the elevator shaft (1) for closing the limiting groove (102), the first installation groove (104) and the second installation groove (105), and the anti-slip component (4) is used to cooperate with the limiting groove (102) when the elevator car (2) is parked at the elevator entrance (101).

2. An elevator electrical safety protection device according to claim 1, characterized in that: Infrared transmitters (201) are embedded in the outer walls of both sides of the elevator car (2), the infrared sensor (7) is used in conjunction with the infrared transmitter (201), and the infrared sensor (7) is connected to the controller (8) by signal.

3. An elevator electrical safety protection device according to claim 1, characterized in that: The anti-slip assembly (4) comprises a first electric telescopic rod (401) and two symmetrical limiting plug plates (402); the first electric telescopic rod (401) is arranged between the two limiting plug plates (402); the end surfaces of the two limiting plug plates (402) penetrate the side wall of the protective shell (202) and extend to the outside; the first electric telescopic rod (401) is fixedly connected to the inner wall of the protective shell (202) by screws; a push plate (404) is screwed on the telescopic end of the first electric telescopic rod (401); a right-angled trapezoidal groove (4021) is provided on one side of the two limiting plug plates (402) close to the first electric telescopic rod (401); and both ends of the push plate (404) are located in the right-angled trapezoidal groove (4021).

4. An elevator electrical safety protection device according to claim 3, characterized in that: Both ends of the push plate (404) are provided with inclined surfaces (4041), and both inclined surfaces (4041) are in contact with the hypotenuse of the right-angle trapezoidal groove (4021) and are slidably connected. A tension spring (405) is provided on the side of the push plate (404) away from the first electric telescopic rod (401), and both ends of the tension spring (405) are respectively fixedly connected to the outer walls of the two limit plug plates (402).

5. An elevator electrical safety protection device according to claim 3, characterized in that: The sides of the two limit plugs (402) away from the first electric telescopic rod (401) are matched with the limit groove (102), the grooves of the two limit grooves (102) are both installed with pressure sensors (6), the sides of the two limit plugs (402) that match the limit groove (102) are both embedded with three balls (403), and the pressure sensors (6) are connected to the controller (8) by signal.

6. An elevator electrical safety protection device according to claim 1, characterized in that: The shaft wall of the elevator shaft (1) is provided with chambers (1031) above the first installation groove (104) and the second installation groove (105), a movable groove (103) is provided above each of the chambers (1031), and the limiting groove (102) is connected to the movable groove (103).

7. An elevator electrical safety protection device according to claim 6, characterized in that: The moving assembly (5) comprises a second electric telescopic rod (501), the second electric telescopic rod (501) being mounted in a chamber (1031) by means of screws, a moving block (502) being slidably arranged in the moving groove (103), a telescopic end of the second electric telescopic rod (501) passing through the chamber (1031) and being located in the moving groove (103) and being screwed to the moving block (502), a first closing plate (503) being welded to an end surface of the moving block (502), and the first closing plate (50 3) contacting and slidably connected with the shaft wall of the elevator shaft (1), the length and height of the first closing plate (503) are greater than the length and height of the limiting groove (102), connecting rods (504) are fixed to both side walls of the first closing plate (503), and the two connecting rods (504) are arranged in an L shape, and a second closing plate (505) is provided below the first closing plate (503), and the other ends of the two connecting rods (504) are fixedly connected to both side walls of the second closing plate (505).

8. An elevator electrical safety protection device according to claim 7, characterized in that: The length and height of the second closing plate (505) are both greater than the length and height of the first mounting groove (104); the thicknesses of the first closing plate (503) and the second closing plate (505) are both less than the gap between the elevator car (2) and the elevator shaft (1); a third closing plate (507) is slidably provided on the inner wall of the elevator shaft (1) at the second mounting groove (105); U-shaped rods (506) are welded to both side walls of the third closing plate (507); the top outer wall of the U-shaped rod (506) is fixedly connected to the moving block (502); and the cross-sections of the first closing plate (503), the second closing plate (505) and the third closing plate (507) are all isosceles trapezoidal.

9. An early warning system for an elevator electrical safety protection device according to any one of claims 1 to 8, characterized in that: The controller (8) is provided with a main control module (801), a signal receiving module (802) and an early warning module (803). The main control module (801) is used to start the moving component (5) after the elevator key of the floor is pressed, so as to expose the limit groove (102), the first installation groove (104) and the second installation groove (105). The signal receiving module (802) is used to receive the signal sent when the infrared sensor (7) detects the passing infrared transmitter (201), and start the anti-slip component (4) through the main control module (801). The early warning module (803) is used to detect the insertion status of the limit groove (102), and then to alarm the leveling difference.

10. An early warning system for an elevator electrical safety protection device according to claim 9, characterized in that: The early warning module (803) comprises a pressure feedback unit (8031) and a voice prompt unit (804). The voice prompt unit (804) is installed in the elevator car (2). The pressure feedback unit (8031) is used to receive a signal sent by the pressure sensor (6). When the signal is received, it indicates that no leveling difference occurs. When the signal is not received, it indicates that the limit plug plate (402) is not inserted into the limit groove (102), and the elevator car (2) has a leveling difference. The voice prompt unit (804) is used to issue a voice prompt when the elevator car (2) has a leveling difference, so as to remind the user that a leveling difference occurs.

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