A speed measuring device of a safety fall arrester

Abstract

The utility model relates to a kind of speed measuring device of safety anti-falling device. Including pivot and the speed measuring roller of being installed in the both ends of pivot, between the middle part of pivot and main lock tongue, left and right two supports are installed, the lower end of support is hinged connection with the middle part of main lock tongue, upper spring is equipped between the top rear portion of support and shell, photoelectric encoder is installed in the inboard of one speed measuring roller, photoelectric sensor is installed on the support of same side with photoelectric encoder cooperation, the speed detection signal of photoelectric sensor is sent to the controller of anti-creeper using wired or wireless mode. The utility model provides a kind of speed measuring device of safety anti-falling device, accurately measures the moving speed of anti-falling device on anti-creeper track, and can send the detection speed value to the controller of anti-creeper, so that anti-creeper can be based on speed matching relationship to carry out safety judgment.

Description

Technical Field

[0001] This utility model belongs to the field of safety device technology, and in particular relates to a speed measuring device for a safety fall arrestor. Background Technology

[0002] Currently, various high-altitude operations and high-altitude transportation operations require lifting platforms (climb-free platforms), such as those used in wind turbine towers. When using climb-free platforms in wind turbine towers, workers are required to use fall arresters (or fall arrest sliders that move along the climb-free platform's track). The fall arrester works by triggering a safety mechanism in the event of a rapid fall, causing the fall arresting latch to extend and engage with the climb-free platform's track, preventing further descent and avoiding injury. However, in practice, it has been observed that fall arresters are not being used correctly. Under normal use, the fall arrester is connected to the worker's safety rope, and the worker stands on the climb-free platform. Therefore, the climb-free platform's movement speed on the track should match the fall arrester's movement speed. When the fall arrester's speed is zero, it usually means that the fall arrester and the worker's safety rope are not properly connected. Conversely, when the fall arrester's movement speed is inconsistent with the climb-free platform's movement speed, it indicates an abnormality. Both of these issues should cause the climb-free platform to stop operating to ensure safety.

[0003] Existing fall arrestor products lack effective speed measurement methods, which makes non-climbing devices lack the ability to make safety judgments based on the speed matching relationship of fall arrestors. Therefore, it is necessary to develop and design them according to specific needs. Summary of the Invention

[0004] The purpose of this invention is to provide a speed measuring device for a safety fall arrestor, which accurately measures the movement speed of the fall arrestor on the track of the non-climbing device, and can send the detected speed value to the controller of the non-climbing device, so that the non-climbing device can make a safety judgment based on the speed matching relationship.

[0005] The technical solution adopted by this utility model is as follows: a speed measuring device for a safety fall arrestor, including a rotating shaft and speed measuring rollers installed at both ends of the rotating shaft. Two brackets are installed between the rotating shaft and the middle of the main locking tongue. The lower end of the bracket is hinged to the middle of the main locking tongue. An upper spring is provided between the top rear of the bracket and the housing. A photoelectric encoder is installed on the inner side of one of the speed measuring rollers. A photoelectric sensor that cooperates with the photoelectric encoder is installed on the bracket on the same side. The speed detection signal of the photoelectric sensor is sent to the controller of the fall arrestor in a wired or wireless manner.

[0006] Preferably, a window is provided on the middle side of the housing, and the photoelectric sensor is located in the window. A protective cover with a waterproof connector is also installed on the side of the housing. The cable connected to the photoelectric sensor passes through the waterproof connector and a magnetic plug is installed at the end of the cable.

[0007] Preferably, a signal transmitter is installed and fixed on the side of the housing. The signal transmitter includes a housing, and a circuit board and a battery are provided inside the housing. The circuit board includes a control module and a wireless transmission module. The cable of the photoelectric sensor is connected to the input terminal of the signal transmitter.

[0008] The advantages and positive effects of this utility model are as follows: This utility model provides a speed measuring device for a fall arrestor, comprising a bracket, a rotating shaft, and a speed measuring roller. Because the lower end of the bracket is hinged to the main locking tongue, the rotating shaft and its speed measuring roller can swing back and forth, with an upper spring providing elastic force. Thus, when the fall arrestor is installed on the track of the fall arrestor, the rim of the speed measuring roller reliably contacts the track surface under the elastic force of the upper spring, ensuring that the linear velocity of the speed measuring roller equals the movement speed of the fall arrestor along the track. By installing a photoelectric encoder on the inner side of the speed measuring roller and using a photoelectric sensor to detect the rotation of the encoder, accurate detection of the speed measuring roller's rotational speed is achieved. The detected speed value is sent to the controller of the fall arrestor via wired or wireless means, enabling the fall arrestor to make safety judgments based on speed matching relationships. In cases of abnormal speed, the fall arrestor will not operate, ensuring the fall safety of workers. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural schematic diagram of the present invention, from the upper rear view. Figure 2 This is a three-dimensional structural schematic diagram of the present invention, from the lower rear view. Figure 3 This is a three-dimensional structural diagram of the main body of this utility model, from the lower rear view.

[0010] In the picture: 1. Left housing; 2. Right housing; 3. Speed ​​measuring roller; 4. Main locking tongue; 5. Protective cover; 6. Waterproof connector; 7. Upper spring; 8. Bracket; 9. Photoelectric encoder; 10. Photoelectric sensor; 11. Secondary locking tongue; 12. Lower spring. Detailed Implementation

[0011] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0012] Please see Figure 1 , Figure 2 and Figure 3The speed measuring device of this utility model is installed on the main body of the safety fall arrestor. As shown in the figure, the safety fall arrestor includes a left shell 1 and a right shell 2 arranged opposite each other, which are connected by screws to form a complete shell. A main locking tongue 4 is installed inside the shell, with its rear end protruding from the shell. A secondary locking tongue 11 is also installed at the front of the shell. The upper part of the secondary locking tongue 11 is hinged to the shell, and its lower part can swing forward. The lower front part of the main locking tongue 4 abuts against the lower part of the secondary locking tongue 11. When the exposed section of the main locking tongue 4 is subjected to an upward pulling force, due to the lever principle, the lower front part of the main locking tongue 4 presses forward against the lower part of the secondary locking tongue 11, causing the lower part of the secondary locking tongue 11 to swing forward. When it swings out to a certain angle, it hooks onto the track of the fall arrestor, restricting the fall arrestor from further descending along the track. This is the fall arrestor's anti-fall action principle.

[0013] A lower spring 12 is installed between the lower front end of the main latch 4 and the housing. The lower spring 12 is used to maintain the position of the main latch 4. The lower spring 12 provides a forward elastic force to the bottom of the main latch 4. When the exposed section of the main latch 4 moves upward, the lower spring 12 is compressed, and conversely, when the exposed section of the main latch 4 moves downward, the lower spring 12 is extended.

[0014] The speed measuring device includes a rotating shaft and speed measuring rollers 3 installed at both ends of the rotating shaft. Two brackets 8 are installed between the rotating shaft and the middle of the main locking tongue 4. The two brackets 8 are located on the left and right sides of the main locking tongue 4 respectively. The lower end of the bracket 8 is hinged to the middle of the main locking tongue 4. An upper spring 7 is provided between the top rear of the bracket 4 and the housing.

[0015] Because the lower end of the bracket 8 is hinged to the middle of the main locking tongue 4, the rotating shaft and its speed measuring roller 3 can swing back and forth. The two upper springs 7 provide a forward elastic force to the upper part of the two brackets 8. When the safety fall arrestor is installed on the non-climbing device track, the rims of the two speed measuring rollers 3 contact the track surface of the non-climbing device track. The elastic force provided by the aforementioned upper springs 7 allows the speed measuring rollers 3 to contact the track surface more reliably. Thus, as the fall arrestor moves along the track, the speed measuring rollers 3 roll stably along the track surface, and the linear velocity of the speed measuring rollers 3 is equal to the moving speed of the fall arrestor.

[0016] An optical encoder 9 is installed on the inner side of one of the speed measuring rollers 3, and an optical sensor 10 that cooperates with the optical encoder 9 is installed on the bracket 8 on the same side. The optical encoder 9 rotates synchronously with the speed measuring roller 3, and the two have the same angular velocity. The optical sensor 10 accurately detects the rotational angular velocity of the optical encoder 9.

[0017] The speed detection signal from the photoelectric sensor 10 is transmitted to the controller of the fall arrestor via wired or wireless means, enabling the controller to make safety judgments based on speed matching relationships. Specifically: when the speed detection signal received by the fall arrestor's controller is zero, it is determined that the fall arrestor has not established a connection with the worker's safety rope; when the movement speed of the fall arrestor is inconsistent with the movement speed of the fall arrestor, an abnormal situation is determined to have occurred, such as the safety rope becoming detached from the fall arrestor. In the event of the aforementioned situations, the fall arrestor should be stopped to avoid safety problems that may arise if the worker has not properly connected the fall arrestor.

[0018] The speed detection signal from the fall arrestor can be sent to the controller of the crawl-free device in two ways, and either one or both can be configured simultaneously: The first type is a wired method: A window is provided on the side of the middle of the housing, and the photoelectric sensor 10 is located in this window. A protective cover 5 with a waterproof connector 6 is also installed on the side of the housing. The cable connected to the photoelectric sensor 10 exits through the waterproof connector 6 and a magnetic plug is installed at the end of the cable. The protective cover 5 provides protection for the photoelectric sensor 10, the waterproof connector 6 is used for cable threading and ensures the waterproofness of the threading point, and the magnetic plug is used to connect to the magnetic socket on the non-climbing device controller. In use, the magnetic plug of the safety fall arrestor is connected to the magnetic socket of the non-climbing device controller. During operation, the speed detection signal of the photoelectric sensor 10 is sent to the controller of the non-climbing device via a wired connection.

[0019] The second method is wireless: A signal transmitter is mounted and fixed on the side of the housing. The signal transmitter includes a casing, inside which is a circuit board and a battery. The circuit board includes a control module and a wireless transmission module. The cable of the photoelectric sensor 10 is connected to the input terminal of the signal transmitter. During operation, the speed detection signal of the photoelectric sensor 10 is wirelessly transmitted to the controller of the crawl-free device.

Claims

1. A speed measuring device for a fall arrestor, characterized in that: Includes a rotating shaft and speed measuring rollers (3) installed at both ends of the rotating shaft. Two brackets (8) are installed between the rotating shaft and the main locking tongue (4). The lower end of the bracket (8) is hinged to the middle of the main locking tongue (4). An upper spring (7) is provided between the top rear of the bracket (8) and the housing. A photoelectric encoder (9) is installed on the inner side of one of the speed measuring rollers (3). A photoelectric sensor (10) that cooperates with the photoelectric encoder (9) is installed on the bracket (8) on the same side. The speed detection signal of the photoelectric sensor (10) is sent to the controller of the crawl-free device in a wired or wireless manner.

2. The speed measuring device for a fall arrestor as described in claim 1, characterized in that: A window is provided on the middle side of the housing, and the photoelectric sensor (10) is located in the window. A protective cover (5) with a waterproof connector (6) is also installed on the side of the housing. The cable connected to the photoelectric sensor (10) is passed through the waterproof connector (6) and a magnetic plug is installed at the end of the cable.

3. The speed measuring device for the safety fall arrester as described in claim 1, characterized in that: A signal transmitter is fixedly installed on the side of the housing. The signal transmitter includes a housing and a circuit board and a battery are provided inside the housing. The circuit board includes a control module and a wireless transmission module. The cable of the photoelectric sensor (10) is connected to the input end of the signal transmitter.

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