An elevator car stall detection device

Abstract

This utility model relates to the field of detection device technology, and proposes an elevator car stall detection device, including a placement frame, a dust cover, a lifting assembly, and a dust blowing assembly. The placement frame is fixedly installed on the side of the traction sheave, and the speed sensor is installed on the placement frame. The dust cover is set on the placement frame via an adjustment assembly. The lifting assembly is located on the side of the placement frame and includes a support frame, electric push rods, and a lifting plate. The support frame is fixedly installed on the side of the placement frame, and two electric push rods are installed on the support frame. The lifting plate is fixedly installed on the output ends of the two electric push rods. The dust blowing assembly is located on the lifting assembly and is used to blow away dust from the surface of the dust cover. This technical solution solves the problem in the prior art where, when the dust cover protecting the sensor is removed, dust adhering to the surface of the dust cover may fall back onto the sensor.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically to an elevator car stall detection device. Background Technology

[0002] The elevator car is the core component of the elevator system that directly carries passengers and goods, and it is the part that users come into direct contact with. During operation, in order to detect whether the elevator is overspeeding or stalling, it is generally equipped with a stall detection device. When the speed of the elevator car exceeds the set safety range, the device will trigger the corresponding safety mechanism, thereby implementing emergency braking on the elevator car.

[0003] When measuring the speed of an elevator car, a speed sensor is usually installed next to the traction sheave that lifts the elevator car. The speed of the elevator car is detected by the speed sensor. Therefore, the friction between the traction sheave and the steel cable will generate metal shavings and steel cable fiber dust. In addition, there will be construction dust in the elevator machine room or shaft. Dust on the sensor will directly affect its detection accuracy, response speed and even service life. Therefore, a dust cover is usually installed on the outside of the sensor.

[0004] When dustproofing sensors, dust covers are usually installed and removed with bolts to block dust. When the sensor needs to be tested or replaced, the dust cover is removed. However, while blocking dust, most of the dust will fall onto the surface of the dust cover. When the dust cover is moved during subsequent disassembly, the dust on its surface will fall and easily fall onto the sensor, thus contaminating the sensor again. Utility Model Content

[0005] This invention proposes an elevator car stall detection device, which solves the problem in the prior art that when the dust cover protecting the sensor is removed, dust adhering to the surface of the dust cover may fall onto the sensor again.

[0006] The technical solution of this utility model is as follows:

[0007] An elevator car stall detection device is installed on the side of a traction sheave and includes a placement frame, a dust cover, a lifting assembly, and a dust blowing assembly. The placement frame is fixedly installed on the side of the traction sheave, and a speed sensor is installed on the placement frame. The dust cover is set on the placement frame via an adjustment assembly. The lifting assembly is set on the side of the placement frame, and the dust blowing assembly is set on the lifting assembly to blow away dust from the surface of the dust cover.

[0008] Furthermore, the adjustment assembly includes a support cover, a reciprocating screw, a motor, an adjustment frame, and a mounting assembly. The support cover is fixedly installed on the side of the placement frame. The reciprocating screw is rotatably installed inside the support cover, and a matching crescent-shaped slider is installed on the reciprocating screw. The motor is installed on the support cover, and the output end of the motor is coaxially connected to the reciprocating screw. One end of the adjustment frame is fixedly installed on the side of the crescent-shaped slider. The mounting assembly is located at the top of the dust cover.

[0009] Furthermore, the mounting assembly includes a mounting bracket and mounting bolts, the mounting bracket being fixedly mounted on the top of the dust cover, and the mounting bolts being threaded onto the sides of the mounting bracket and the adjusting bracket.

[0010] Furthermore, the lifting assembly includes a support frame, electric push rods, and a lifting plate. The support frame is fixedly installed on the side of the placement frame, and two electric push rods are installed on the support frame. The lifting plate is fixedly installed on the output ends of the two electric push rods.

[0011] Furthermore, the dust blowing assembly includes a blower, a U-shaped blowing pipe, and an upper blowing pipe. The blower is mounted on the lifting plate, the U-shaped blowing pipe is connected to the air outlet of the blower, the upper blowing pipe is connected to the top of the U-shaped blowing pipe, and both the air outlets of the U-shaped blowing pipe and the upper blowing pipe are connected to an air outlet hopper.

[0012] In order to enable the crescent-shaped slider to move vertically back and forth on the reciprocating screw, the inner side wall of the support cover is provided with a sliding groove, a limit block is slidably installed in the sliding groove, and the side of the crescent-shaped slider is fixedly installed on the side of the limit block.

[0013] The working principle and beneficial effects of this utility model are as follows:

[0014] 1. In this utility model, when the speed sensor is in use, the dust cover can be moved down to the top of the placement frame by adjusting the component, so that the speed sensor is covered inside the dust cover, thereby preventing dust from the speed sensor. When the speed sensor needs to be taken out later, the dust blowing component can blow away the dust remaining on both sides and the top of the dust cover, preventing dust from falling onto the speed sensor when the dust cover is moved.

[0015] 2. In this utility model, when moving the dust cover, the dust cover can be slowly moved upward by adjusting the component, thereby preventing residual dust from falling down. Furthermore, raising and lowering the dust cover by adjusting the component is more convenient than manually moving it.

[0016] In summary, through the cooperation of the placement frame, dust cover, lifting assembly, and dust blowing assembly, this device can clean the dust on the surface of the dust cover when moving the speed sensor, preventing residual dust from falling onto the speed sensor again when the dust cover is moved. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the dust cover and adjustment components of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the lifting component and the dust blowing component of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the placement frame and the speed sensor of this utility model.

[0022] In the diagram: 1. Traction wheel; 2. Placement frame; 3. Speed ​​sensor; 4. Dust cover; 5. Support cover; 6. Reciprocating screw; 7. Crescent slider; 8. Motor; 9. Adjustment frame; 10. Mounting frame; 11. Mounting bolt; 12. Support frame; 13. Electric push rod; 14. Lifting plate; 15. Blower; 16. U-shaped air duct; 17. Top air duct; 18. Air outlet hopper. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0024] like Figures 1-4 As shown, this embodiment proposes an elevator car stall detection device, which is installed on the side of the traction sheave 1. It includes a placement frame 2, a dust cover 4, a lifting assembly, and a dust blowing assembly. The placement frame 2 is fixedly installed on the side of the traction sheave 1, and the speed sensor 3 is installed on the placement frame 2. The dust cover 4 is set on the placement frame 2 through an adjustment assembly. The lifting assembly is set on the side of the placement frame 2, and the dust blowing assembly is set on the lifting assembly to blow away the dust on the surface of the dust cover 4.

[0025] like Figure 1 and Figure 4As shown, the elevator car moves up and down on the steel wire rope driven by the traction sheave 1. The traction sheave 1 is controlled to rotate by the reducer and the motor 8. The speed sensor 3 is installed on the side of the traction sheave 1. Through the internal grating disk that rotates synchronously with the traction sheave 1, when the grating disk rotates, the light source shines through the stripes onto the photosensitive element, generating a periodic pulse signal. Then the controller calculates the rotational speed of the traction sheave 1. If the elevator car stalls, the rotational speed of the corresponding traction sheave 1 will be uneven, and the speed sensor 3 will send a signal. The drive device will then activate the limit device to limit the elevator car and ensure the safety of the passengers inside.

[0026] like Figure 2 As shown, during speed measurement, the dust cover 4 can be adjusted to cover the speed sensor 3 to prevent dust. The adjustment component includes a support cover 5, a reciprocating screw 6, a motor 8, an adjustment frame 9, and a mounting component. The support cover 5 is fixedly installed on the side of the placement frame 2. The reciprocating screw 6 is rotatably installed inside the support cover 5, and a matching crescent-shaped slider 7 is installed on the reciprocating screw 6. The motor 8 is installed on the support cover 5, and the output end of the motor 8 is coaxially connected to the reciprocating screw 6. One end of the adjustment frame 9 is fixedly installed on the side of the crescent-shaped slider 7. The mounting component is located at the top of the dust cover 4. The mounting component includes a mounting frame 10 and mounting bolts 11. The mounting frame 10 is fixedly installed at the top of the dust cover 4, and the mounting bolts 11 are threaded onto the sides of the mounting frame 10 and the adjustment frame 9.

[0027] Specifically, by starting the motor 8, the output end of the motor 8 drives the reciprocating screw 6 to rotate inside the support cover 5. It should be added that the crescent slider 7 is mounted on the reciprocating screw 6 through a reciprocating sleeve, which is a known technology. Furthermore, the inner side wall of the support cover 5 is provided with a sliding groove, in which a limit block is slidably installed. The side of the crescent slider 7 is fixedly mounted on the side of the limit block. Then, the crescent slider 7 drives the adjusting frame 9 to move down on the reciprocating screw 6. Before this, the mounting frame 10 can be installed on the other end of the adjusting frame 9 by the mounting bolt 11, thereby installing the dust cover 4 on the adjusting frame 9. The dust cover 4 moves down to cover the speed sensor 3 for dust protection. It should also be added that a telescopic protective sleeve is installed on the outside of the reciprocating screw 6 to protect the reciprocating screw 6.

[0028] like Figure 3As shown, when the speed sensor 3 needs to be repaired or disassembled, the dust blowing assembly can be driven by the lifting assembly to blow away the dust on the surface of the dust cover 4. The lifting assembly includes a support frame 12, an electric push rod 13 and a lifting plate 14. The support frame 12 is fixedly installed on the side of the placement frame 2. Two electric push rods 13 are installed on the support frame 12. The lifting plate 14 is fixedly installed on the output end of the two electric push rods 13. The dust blowing assembly includes a blower 15, a U-shaped air blowing pipe 16 and an upper air blowing pipe 17. The blower 15 is installed on the lifting plate 14. The U-shaped air blowing pipe 16 is connected to the air outlet of the blower 15. The upper air blowing pipe 17 is connected to the top of the U-shaped air blowing pipe 16. The air outlets of the U-shaped air blowing pipe 16 and the upper air blowing pipe 17 are both connected to the air outlet hopper 18.

[0029] Specifically, the blower 15 is started, and the air from the blower 15 enters the air outlet hopper 18 through the U-shaped blower pipe 16 and the upper blower pipe 17. The U-shaped blower pipe 16 can blow the air to both sides of the dust cover 4, while the upper blower pipe 17 blows the air to the top of the dust cover 4. The electric push rod 13 is also started, which drives the lifting plate 14 to move up and down, thereby driving the blower 15 to move up and down to blow dust from different positions of the dust cover 4. After the dust blowing is completed, the motor 8 is started, which causes the adjusting frame 9 to rise slowly, thus slowly moving the dust cover 4.

[0030] Working principle: When testing the traction wheel 1, the motor 8 can be started. The output end of the motor 8 drives the reciprocating screw 6 to rotate inside the support cover 5. Then the crescent slider 7 drives the adjustment frame 9 to move down on the reciprocating screw 6. Before this, the mounting frame 10 can be installed on the other end of the adjustment frame 9 by the mounting bolt 11, so that the dust cover 4 can be installed on the adjustment frame 9. The dust cover 4 moves down to cover the speed sensor 3 for dust prevention.

[0031] When the speed sensor 3 needs to be repaired or disassembled, the blower 15 can be started. The air from the blower 15 enters the air outlet hopper 18 through the U-shaped blower pipe 16 and the upper blower pipe 17. The U-shaped blower pipe 16 can blow the air to both sides of the dust cover 4, while the upper blower pipe 17 blows the air to the top of the dust cover 4. The electric push rod 13 can be started, which drives the lifting plate 14 to move up and down, thereby driving the blower 15 to move up and down to blow dust on different positions of the dust cover 4. After the dust blowing is completed, the motor 8 is started, which makes the adjusting frame 9 slowly rise and slowly move the dust cover 4 up.

[0032] It should be added that the dust cover 4 is made of glass or wood, so it will not obstruct the speed sensor 3 from measuring the speed of the traction wheel 1. Furthermore, the elevator shaft is equipped with a control device and related equipment, so both the motor 8 and the electric push rod 13 can be powered and controlled by the control device. The two electric push rods 13 are controlled by a controller, which can synchronously drive the output ends of the two electric push rods 13 to move up and down. The two electric push rods 13 are controlled by the same controller, such as a PL or PC-based controller, and are electrically connected to the controller via wires. One electric push rod 13 is designated as the master cylinder, and the other electric push rods 13 are designated as slave cylinders. The slave cylinders can move synchronously following the movement of the master cylinder's output end. The controller is electrically connected to an encoder via wires. The master cylinder sets the trajectory, and the slave cylinders compensate for deviations through encoder feedback, thus enabling the output ends of the two electric push rods 13 to move synchronously.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An elevator car stall detection device installed on the side of a sheave (1), characterized in that, Also includes: A placement frame (2) is fixedly installed on the side of the traction wheel (1), and a speed sensor (3) is installed on the placement frame (2); A dust cover (4) is mounted on the placement rack (2) via an adjustment assembly; A lifting assembly is disposed on the side of the placement frame (2); A dust blowing assembly is provided on the lifting assembly and is used to blow away dust from the surface of the dust cover (4).

2. The elevator car overspeed detection apparatus of claim 1, wherein The adjustment component includes: Support cover (5), which is fixedly installed on the side of the placement frame (2); A reciprocating lead screw (6) is rotatably mounted inside the support cover (5), and a matching crescent-shaped slider (7) is mounted on the reciprocating lead screw (6); The motor (8) is mounted on the support cover (5), and the output end of the motor (8) is coaxially connected to the reciprocating screw (6); An adjustment bracket (9) is provided, one end of which is fixedly mounted on the side of the crescent-shaped slider (7). The mounting component is disposed at the top of the dust cover (4).

3. A car stall detection device according to claim 2, wherein The installation components include: Mounting bracket (10), which is fixedly mounted on the top of the dust cover (4); Mounting bolts (11) are threaded onto the sides of the mounting bracket (10) and the adjusting bracket (9).

4. The elevator car overspeed detection apparatus of claim 3, wherein The lifting assembly includes: A support frame (12) is fixedly installed on the side of the placement frame (2); Electric push rods (13), two of the electric push rods (13) are mounted on the support frame (12); A lifting plate (14) is fixedly installed on the output ends of the two electric push rods (13).

5. An elevator car overspeed detection device according to claim 4, wherein The dust blowing assembly includes: A blower (15) is mounted on the lifting plate (14); U-shaped air duct (16), the U-shaped air duct (16) being connected to the air outlet of the blower (15); An upper blowing pipe (17) is connected to the top of the U-shaped blowing pipe (16), and the air outlets of the U-shaped blowing pipe (16) and the upper blowing pipe (17) are both connected to an air outlet hopper (18).

6. A car stall detection device according to claim 5, wherein The inner wall of the support cover (5) is provided with a sliding groove, a limit block is slidably installed in the sliding groove, and the side of the crescent slider (7) is fixedly installed on the side of the limit block.

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