High-falling-prevention protection device relying on power transmission line iron tower foot nails

Abstract

The invention provides an anti-falling protection device relying on a power transmission line iron tower foot nail, and belongs to the field of high-altitude operation safety protection. The safety device aims to solve the problem that an existing safety device for personnel working on an iron tower with the voltage class of 220 kilovolts and below cannot conveniently go up and down the iron tower. The device comprises a positioning plate, a fixing plate, a connecting plate, a fastening plate and a rotation control device. The rotating control device is fixed on the positioning plate by the fixing plate, the positioning plate and the connecting plate are mounted in parallel to form a first space for rotating the fastening plate, the fastening plate is arranged in the first space, the rotating control device and the fastening plate are mounted, and the rotating control device controls the fastening plate to rotate; a clamping tongue part matched with the fastening plate is arranged on the positioning plate, the fastening plate is of a hook-shaped structure and is provided with a cavity limiting part, and a locking cavity is defined by the fastening plate and the cavity limiting part. The device is simple in structure, a traditional operation mode that a double-hook type safety belt is frequently hooked is replaced, and the quality and efficiency of electric tower aerial work of workers are effectively improved.

Description

Technical Field

[0001] The invention belongs to the field of high-altitude operation safety protection, and in particular relates to an anti-falling protection device relying on the foot nails of a power transmission line iron tower. Background Art

[0002] Combined with the current grid construction and actual on-site operation, iron towers with voltage levels of 220 kV and below are generally not equipped with slide-type quick-check brake devices. New 500 kV lines are equipped with slides on each iron tower. The fundamental reason is that they are used less frequently. Installing quick-check brake slides on all towers of the line project increases the project cost, and the original old operating lines are not designed with them. The "State Grid Corporation of China Electric Power Safety Work Regulations (Line Section)" clearly requires that workers working at heights and climbing operations must be within the protection range. At present, the power company system requires construction, operation, and maintenance personnel to use double-hook safety belts when going up and down the iron towers. It is extremely inconvenient for workers to use existing safety devices to go up and down the iron towers, which seriously affects work efficiency.

[0003] To sum up, it is urgent to design a fall protection device that can overcome the above problems and is suitable for iron towers with voltage levels of 220 kV and below, so as to ensure the safety of workers going up and down the iron tower and improve the quality and efficiency of workers' high-altitude operations on electric towers. Summary of the invention

[0004] A brief overview of the present invention is provided below in order to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify key or important parts of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0005] In view of this, in order to solve the practical problem that it is inconvenient for personnel working on iron towers with voltage levels of 220 kV and below to go up and down the iron towers with existing safety devices, the present invention provides an anti-fall protection device relying on the foot nails of the transmission line iron tower.

[0006] Solution 1: A high-fall protection device relying on the foot nails of a transmission line tower, comprising a positioning plate, a fixing plate, a connecting plate, a fastening plate, and a rotation control device;

[0007] The fixing plate fixes the rotation control device on the positioning plate. The positioning plate and the connecting plate are installed in parallel to form a first space for the fastening plate to rotate. The fastening plate is arranged in the first space. The rotation control device and the fastening plate establish an installation relationship. The rotation control device is used to control the rotation of the fastening plate.

[0008] The positioning plate has a tongue portion that matches the fastening plate. The fastening plate is a "hook-shaped" structure. The end of the fastening plate has a cavity limiting portion, and the two are enclosed to form a locking cavity.

[0009] Furthermore, the positioning plate is provided with a positioning protrusion, which makes it easier for workers to embed the foot nails into the locking cavity when climbing.

[0010] Furthermore, the diameter of the locking cavity is D, the diameter of the foot spike is d, and the calculation formula is: D=1.1d~1.25d; while ensuring safety, the staff's feet have a certain amount of space to move, thereby improving the comfort during the climbing process.

[0011] Furthermore, a retaining bolt is provided in the arc of the positioning plate, and the retaining bolt includes a spring device and a first pressure sensor.

[0012] Furthermore, the positioning plate is connected to the fixing plate through a first fastening bolt and a second fastening bolt, and the positioning plate is installed with the connecting plate through a third fastening bolt.

[0013] Furthermore, the rotation control device is a rotating electromagnet.

[0014] Furthermore, the protective device is also connected to a wearing device, which includes a foot fixing device, a first strap and a second strap; two protective devices are fixedly connected to both sides of the bottom of the foot fixing device, and the first strap and the second strap are installed on the foot fixing device, and the tightness is controlled by a buckle structure.

[0015] Furthermore, a power supply is provided at the bottom of the foot fixing device.

[0016] Furthermore, a safety hook is provided on the rear side of the foot fixing device.

[0017] Furthermore, the protection device is externally connected to a hand-worn accessory containing an indicator light and a second pressure sensor.

[0018] Solution 2: A method for using a high-fall protection device based on the foot nails of a power transmission line tower, comprising the following steps:

[0019] S1. The worker should wear the "five-point safety belt" for high-altitude work, connect the safety hook and the matching safety rope to the worker's waist or chest safety ring, and ensure the connection is safe and reliable;

[0020] S2. The staff wears the hand-worn accessories containing the second pressure sensor and the indicator light on both hands, ensuring that the second pressure sensor is located in the palm of the hand and does not hinder the staff from climbing with the foot nails;

[0021] S3. The staff member places both feet on the foot fixing device, adjusts the first strap and the second strap to a comfortable and firm state, and fixes the position of the first strap and the second strap by the buckle structure on the foot fixing device;

[0022] S4. After the staff has put on the device, turn on the power supply and conduct a safety test on the anti-fall device before use to test whether the first pressure sensor, the second pressure sensor and the rotation control device can work normally;

[0023] S5. After the safety test is completed, first hold the foot nail with your left hand to generate pressure, and the second pressure sensor on the left side collects the pressure signal; then climb up with your right foot, and when the right foot nail is embedded in the arc of the positioning plate, the spring device in the positioning bolt squeezes the first pressure sensor on the right side, and the first pressure sensor on the right side collects the pressure signal, and the left hand indicator light is on. At this time, the control unit simultaneously obtains the transmission signals of the second pressure sensor on the left side and the first pressure sensor on the right side, and the control unit controls K2 to close, and the right rotating electromagnet is energized. The rotating control device on the right foot drives the fastening plate to rotate and then locks. At this time, the cavity limit portion of the fastening plate and the tongue portion of the positioning plate enclose to form a locking cavity, thereby realizing the locking of the right foot protection device; the same steps are used to realize the locking of the left foot protection device;

[0024] S6. During the alternating climbing process, the worker lets go and the second pressure sensor opens. At this time, the rotation control device drives the fastening plate to rotate back to the initial position, and the locking cavity is opened so that the worker can continue to climb;

[0025] S7. When both hands are released from the foot spikes at the same time, the second sensors on the left and right sides are opened at the same time, the protection device starts the emergency brake, the brake module controls K1 and K2 to close at the same time, and the rotation control device will not drive the fastening plate to retract, so that the protection device and the foot spikes are locked to prevent the staff from falling from a height.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention provides a high-fall protection device for workers climbing iron towers with a voltage level of 220 kV or below, replacing the frequent hooking operation mode of the traditional double-hook safety belt, thus avoiding high-altitude falling accidents caused by operating errors or device failure;

[0028] 2. The present invention has a simple structure and can be used in combination with the current status of line towers without changing the existing operating equipment;

[0029] 3. The device of the present invention is designed according to the working habits of the staff, which is convenient for the movement and operation of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 It is a structural schematic diagram of a high-fall protection device relying on the foot nails of a transmission line tower;

[0032] Figure 2 for Figure 1 The main view;

[0033] Figure 3 for Figure 1 A top view of

[0034] Figure 4 A diagram showing the position relationship between the fastening plate and the connecting plate when the cavity is opened;

[0035] Figure 5 is a perspective view of a positioning plate;

[0036] Figure 6 is a schematic diagram of the structure of the rotation control device;

[0037] Figure 7 A schematic diagram of a structure connected to a wearable device;

[0038] Figure 8 This is a schematic diagram of the working circuit of the device in Example 2;

[0039] Fig. 9 This is a schematic diagram of the working circuit of the device in Example 3;

[0040] Fig.10 Schematic diagram of climbing in Example 4

[0041] Fig.11 This is a schematic diagram of Example 4 when falling.

[0042] In the figure: 1-positioning plate, 2-fixing plate, 3-connecting plate, 4-fastening plate, 5-first fastening bolt, 6-positioning bolt, 7-second fastening bolt, 8-third fastening bolt, 9-rotation control device, 10-foot fixing device, 11-first strap, 12-second strap, 13-power supply, 14-safety hook, 101-tongue part, 102-positioning protrusion, 103-locking cavity, 104-locking slide, 105-locking mouth, 106-locking pin, 401-first space, 402-cavity limiting part, 601-spring device, 602-first pressure sensor. DETAILED DESCRIPTION

[0043] In order to make the technical solutions and advantages of the embodiments of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0044] When tower workers perform maintenance and inspection work on towers with voltage levels of 220 kV and below, outside electricians need to climb with the help of tower side spikes. In view of the current power grid construction and actual on-site operation, the anti-fall protection device for outside electricians when going up and down the tower is a double-hook safety belt. The operation steps of this protection measure are cumbersome and frequent, which consumes a huge amount of physical strength of the workers and is not conducive to subsequent operations on the tower.

[0045] Example 1, reference Figure 1-7 The present embodiment is described as follows: a high-fall protection device relying on the foot nails of a power transmission line tower comprises a positioning plate 1, a fixing plate 2, a connecting plate 3, a fastening plate 4, and a rotation control device 9;

[0046] The fixing plate 2 fixes the rotation control device 9 on the positioning plate 1. The positioning plate 1 and the connecting plate 3 are installed in parallel to form a first space 401 for the fastening plate 4 to rotate. The fastening plate 4 is arranged in the first space 401. The rotation control device 9 and the fastening plate 4 establish an installation relationship. The rotation control device 9 is used to control the rotation of the fastening plate 4.

[0047] The positioning plate 1 has a tongue portion 101 that matches with the fastening plate 4 . The fastening plate 4 is a “hook-shaped” structure. The end of the fastening plate 4 has a cavity limiting portion 402 . The two together form a locking cavity 103 .

[0048] Furthermore, a positioning protrusion 102 is provided on the positioning plate 1, so that the worker can more easily insert the foot nail into the locking cavity 103 when climbing.

[0049] Furthermore, the diameter of the locking cavity 103 is D, the diameter of the foot spike is d, and the calculation formula is: D=1.1d~1.25d; while ensuring safety, the staff's feet have a certain amount of space to move, thereby improving the comfort during the climbing process.

[0050] Furthermore, a retaining bolt 6 is provided in the arc of the positioning plate 1 , and the retaining bolt 6 includes a spring device 601 and a first pressure sensor 602 .

[0051] Furthermore, the positioning plate 1 is connected to the fixing plate 2 via a first fastening bolt 5 and a second fastening bolt 7 , and the positioning plate 1 is mounted to the connecting plate 3 via a third fastening bolt 8 .

[0052] Furthermore, the rotation control device 9 is a rotating electromagnet.

[0053] Furthermore, the protective device is also connected to a wearable device, which includes a foot fixing device 10, a first strap 11 and a second strap 12; two protective devices are fixedly connected to the two sides of the bottom of the foot fixing device 10, and the first strap 11 and the second strap 12 are installed on the foot fixing device 10, and the tightness is controlled by a buckle structure.

[0054] Furthermore, a power supply 13 is provided at the bottom of the foot fixing device 10 .

[0055] Furthermore, a safety hook 14 is provided on the rear side of the foot fixing device 10 .

[0056] Furthermore, the protection device is externally connected to a hand-worn accessory containing an indicator light and a second pressure sensor.

[0057] Example 2, reference Figure 8 The present embodiment is described as follows, a method for using a high-fall protection device relying on the foot nails of a power transmission line tower. In this embodiment, no retaining bolt 6 is provided in the arc of the positioning plate 1 of the high-fall protection device. The specific method for using the high-fall protection device based on this structure includes the following steps:

[0058] S1. The staff wears the "five-point safety belt" for high-altitude operations, connects the safety rope of the safety hook 14 to the waist or chest safety ring of the staff, and ensures that the connection is safe and reliable;

[0059] S2. The staff wears the hand-worn accessories containing the second pressure sensor on both hands, ensuring that the second pressure sensor is located in the palm of the hand and does not hinder the staff from climbing with the foot nails;

[0060] S3. The staff member places both feet on the foot fixing device 10, adjusts the first strap 11 and the second strap 12 to a comfortable and firm state, and fixes the position of the first strap 11 and the second strap 12 by the buckle structure on the foot fixing device 10;

[0061] S4. After the staff wears it, turn on the power 13, conduct a safety test before using the anti-fall device, and test whether the second pressure sensor and the rotation control device 9 can work normally;

[0062] S5. After the safety test is completed, first, hold the foot nail tightly with the left hand to generate pressure, and the second pressure sensor on the left side collects the pressure signal. At this time, the control unit obtains the transmission signal of the second pressure sensor on the left side, controls K2 to open, and the right rotating electromagnet is powered off. The rotating control device 9 on the right foot drives the fastening plate 4 to retract, and the locking cavity 103 is opened so that the right foot can climb upward; secondly, hold the foot nail tightly with the right hand to generate pressure, and the second pressure sensor on the right side collects the pressure signal. At this time, the control unit obtains the transmission signal of the second pressure sensor on the right side, controls K1 to open, and the left rotating electromagnet is powered off. The rotating control device 9 on the left foot drives the fastening plate 4 to retract, and the locking cavity 103 is opened so that the left foot can climb upward;

[0063] S6. During the alternating climbing process, the staff lets go and opens the second pressure sensor. At this time, the control unit does not obtain the transmission signal of the second pressure sensor, K1 and K2 are in a closed state, the rotating electromagnet is energized, and the rotating control device 9 drives the fastening plate 4 to rotate and then lock. At this time, the cavity limit portion 402 of the fastening plate 4 and the tongue portion 101 of the positioning plate 1 are enclosed to form a locking cavity 103, thereby realizing the locking of the protective device.

[0064] Example 3, reference Fig. 9 The present embodiment is described as follows, a method for using a high-fall protection device that relies on the foot spikes of a power transmission line tower. In the present embodiment, a locking bolt 6 is provided in the arc of the positioning plate 1 of the high-fall protection device, and the locking bolt 6 includes a spring device 601 and a first pressure sensor 602; when climbing with the help of the tower side foot spikes, the first pressure sensor 602 can detect whether the "foot spikes" are accurately stuck in the locking cavity 103, so as to improve the safety indication of the safe climbing process. The specific method for using the high-fall protection device based on this structure includes the following steps:

[0065] S1. The staff wears the "five-point safety belt" for high-altitude operations, connects the safety rope of the safety hook 14 to the waist or chest safety ring of the staff, and ensures that the connection is safe and reliable;

[0066] S2. The staff wears the hand-worn accessories containing the second pressure sensor and the indicator light on both hands, ensuring that the second pressure sensor is located in the palm of the hand and does not hinder the staff from climbing with the foot nails;

[0067] S3. The staff member places both feet on the foot fixing device 10, adjusts the first strap 11 and the second strap 12 to a comfortable and firm state, and fixes the position of the first strap 11 and the second strap 12 by the buckle structure on the foot fixing device 10;

[0068] S4. After the staff wears the device, turn on the power 13 and conduct a safety test before use of the anti-fall device to test whether the first pressure sensor 602, the second pressure sensor and the rotation control device 9 can work normally;

[0069] S5. After the safety test is completed, first hold the foot nail with your left hand to generate pressure, and the second pressure sensor on the left side collects the pressure signal; then climb up with your right foot, and when the right foot nail is embedded in the arc of the positioning plate 1, the spring device 601 in the positioning bolt 6 squeezes the first pressure sensor 602 on the right side, and the first pressure sensor 602 on the right side collects the pressure signal, and the left hand indicator light is on. At this time, the control unit simultaneously obtains the transmission signals of the second pressure sensor on the left side and the first pressure sensor on the right side 602, and the control unit controls K2 to close, and the right rotating electromagnet is energized. The rotating control device 9 on the right foot drives the fastening plate 4 to rotate and lock. At this time, the cavity limit portion 402 of the fastening plate 4 and the tongue portion 101 of the positioning plate 1 are enclosed to form a locking cavity 103, so that the right foot protection device is locked; the same steps are used to lock the left foot protection device;

[0070] S6. During the alternating climbing process, the staff member lets go and opens the second pressure sensor. At this time, the rotation control device 9 drives the fastening plate 4 to rotate back to the initial position, and the locking cavity 103 is opened so that the staff member can continue to climb;

[0071] S7. When both hands are released from the foot nails at the same time, the second sensors on the left and right sides are opened at the same time, the protection device starts the emergency brake, the brake module controls K1 and K2 to close at the same time, and the rotation control device 9 will not drive the fastening plate 4 to retract, so that the protection device and the foot nails are locked to prevent the staff from falling from a height.

[0072] Example 4, reference Figure 1-10 The present embodiment is described as a fall protection device relying on the foot nails of a power transmission line tower. The positioning plate 1 is provided with a locking slide 104, a locking port 105 and a locking pin 106; the locking pin 106 is a "barbell" shaped structure;

[0073] When the staff climbs normally, the locking pin 106 is located at the lower end of the locking slide 104 due to the force of gravity, and the protection device can work normally;

[0074] When the worker's hands are separated from the foot nails and are in an upside-down state, the protection device activates the emergency brake, and the fastening plate 4 is locked with the positioning plate 1 to prevent the worker from falling from a height; when the rotation control device 9 fails, the fastening plate 4 cannot remain in the locked state. At this time, the locking pin 106 is acted upon by gravity and enters the locking port 105 along the locking slide 104, and is located on the trajectory of the fastening plate 4 returning to its initial position, making it impossible for the fastening plate 4 to return to its initial position, thereby achieving secondary protection for the worker.

[0075] Furthermore, the center position of the locking opening 105 deviates from the center of the locking slideway 104 by 0.25 times the width of the locking slideway 104 ; the purpose is to prevent the locking pin 106 from easily escaping from the locking opening 105 .

[0076] The present invention can provide a fall protection device for workers climbing iron towers with a voltage level of 220 kV and below, replacing the frequent hooking operation mode of traditional double-hook safety belts, thereby avoiding high-altitude fall accidents caused by operating errors or device failure. The device has a simple structure and can be used in combination with the current status of line towers without changing existing operating equipment.

[0077] Although the present invention has been described according to a limited number of embodiments, it will be apparent to those skilled in the art, with the benefit of the above description, that other embodiments may be envisioned within the scope of the invention thus described. In addition, it should be noted that the language used in this specification is selected primarily for readability and teaching purposes, rather than for explaining or defining the subject matter of the present invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is illustrative, not restrictive, with respect to the scope of the present invention, which is defined by the appended claims.

Claims

1. A high-fall protection device relying on the foot nails of a power transmission line tower, characterized in that: It comprises a positioning plate (1), a fixing plate (2), a connecting plate (3), a fastening plate (4), and a rotation control device (9); The fixing plate (2) fixes the rotation control device (9) on the positioning plate (1); the positioning plate (1) and the connecting plate (3) are installed in parallel to form a first space (401) for rotating the fastening plate (4); the fastening plate (4) is arranged in the first space (401); the rotation control device (9) and the fastening plate (4) establish an installation relationship; the rotation control device (9) is used to control the rotation of the fastening plate (4); The positioning plate (1) has a tongue portion (101) that matches the fastening plate (4); the fastening plate (4) is a "hook-shaped" structure; the end of the fastening plate (4) has a cavity limiting portion (402); the two together form a locking cavity (103).

2. According to claim 1, a high-fall protection device relying on the foot nails of the power transmission line tower is characterized in that: The positioning plate (1) is provided with a positioning protrusion (102), so that workers can more easily insert the foot nails into the locking cavity (103) when climbing.

3. According to claim 2, a high-fall protection device relying on the foot nails of the power transmission line tower is characterized in that: The diameter of the locking cavity (103) is D, the diameter of the foot nail is d, and the calculation formula is: D=1.1d~1.25d.

4. According to claim 2, a high-fall protection device relying on the foot nails of the power transmission line tower is characterized in that: A retaining bolt (6) is provided in the circular arc of the positioning plate (1), and the retaining bolt (6) comprises a spring device (601) and a first pressure sensor (602).

5. The anti-fall protection device based on the foot nails of the power transmission line tower according to claim 4, characterized in that: The positioning plate (1) is connected to the fixing plate (2) via a first fastening bolt (5) and a second fastening bolt (7), and the positioning plate (1) is mounted to the connecting plate (3) via a third fastening bolt (8).

6. The anti-fall protection device based on the foot nails of the power transmission line tower according to claim 1, characterized in that: The rotation control device (9) is a rotating electromagnet.

7. The anti-fall protection device based on the foot nails of the power transmission line tower according to claim 1, characterized in that: The protective device is also connected to a wearing device, which includes a foot fixing device (10), a first strap (11) and a second strap (12); two protective devices are fixedly connected to the two sides of the bottom of the foot fixing device (10), and the first strap (11) and the second strap (12) are installed on the foot fixing device (10), and the tightness is controlled by a buckle structure.

8. The anti-fall protection device based on the foot nails of the power transmission line tower according to claim 7, characterized in that: A power source (13) is provided at the bottom of the foot fixing device (10).

9. The anti-fall protection device based on the foot nails of the power transmission line tower according to claim 7, characterized in that: A safety hook (14) is provided on the rear side of the foot fixing device (10).

10. A method for using a high-fall protection device based on the foot nails of a power transmission line tower, characterized in that: The anti-fall protection device based on the transmission line tower foot nails according to claim 1 is implemented, specifically comprising the following steps: S1. The worker wears a "five-point safety belt" for high-altitude operations, connects the safety hook (14) with the matching safety rope to the worker's waist or chest safety ring, and ensures that the connection is safe and reliable; S2. The staff wears the hand-worn accessories containing the second pressure sensor and the indicator light on both hands, ensuring that the second pressure sensor is located in the palm of the hand and does not hinder the staff from climbing with the foot nails; S3. The staff member places both feet on the foot fixing device (10), adjusts the first strap (11) and the second strap (12) to a comfortable and firm state, and then fixes the positions of the first strap (11) and the second strap (12) by means of the buckle structure on the foot fixing device (10); S4. After the staff has finished wearing the device, turn on the power supply (13) and conduct a safety test on the anti-fall device before use to test whether the first pressure sensor (602), the second pressure sensor and the rotation control device (9) can work normally; S5. After the safety test is completed, first, hold the foot nail with the left hand to generate pressure, and the second pressure sensor on the left side collects the pressure signal; then, the right foot climbs upward, and when the right foot nail is embedded in the arc of the positioning plate (1), the spring device (601) in the locking bolt (6) squeezes the first pressure sensor (602) on the right side, and the first pressure sensor (602) on the right side collects the pressure signal, and the left hand indicator light is on. At this time, the control unit simultaneously obtains the transmission signals of the second pressure sensor on the left side and the first pressure sensor on the right side (602), and the control unit controls K2 to close, and the right rotating electromagnet is energized. The rotating control device (9) on the right foot drives the fastening plate (4) to rotate and lock. At this time, the cavity limiting portion (402) of the fastening plate (4) and the tongue portion (101) of the positioning plate (1) are enclosed to form a locking cavity (103), thereby realizing the locking of the right foot protection device; the same steps are used to realize the locking of the left foot protection device; S6. During the alternating climbing process, the staff member lets go and opens the second pressure sensor. At this time, the rotation control device (9) drives the fastening plate (4) to rotate back to the initial position, and the locking cavity (103) is opened so that the staff member can continue to climb; S7. When both hands are released from the foot nails at the same time, the second sensors on the left and right sides are opened at the same time, the protection device starts emergency braking, the brake module controls K1 and K2 to close at the same time, and the rotation control device (9) will not drive the fastening plate (4) to retract, so that the protection device and the foot nails are locked to prevent the staff from falling from a height.

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