Iron tower anti-falling channel low in cost and easy to manufacture

Abstract

The utility model relates to the technical field of aerial work protection personnel falling prevention equipment, in particular to an iron tower falling prevention channel low in cost and easy to manufacture. The anti-falling channel comprises a plurality of right spiral wing type quick-buckling foot nails, a plurality of left spiral wing type quick-buckling foot nails, a channel pulley and a speed difference anti-falling device, the right spiral wing type quick-buckling foot nails and the left spiral wing type quick-buckling foot nails are arranged on the two sides of an iron tower supporting column respectively, and the channel pulley is arranged at the bottom end of the iron tower supporting column. The outer wall of the iron tower supporting column is sleeved with the speed difference falling protector, the outer sides of the left foot nail and the right foot nail in the channel are each provided with a quick buckling device, each quick buckling device is of a spiral structure, an included angle formed by the bottom edge and the top edge of each spiral structure facilitates feeding of a safety rope, and the top edges of the spiral structures of the quick buckling devices limit the safety rope fed into the centers of the spiral structures. The quick buckle device can further laterally limit the feet of the operator to prevent slipping during operation, the channel pulley is matched with the safety rope in the speed difference falling protector, and the burden of the operator during tower climbing operation is relieved.

Description

Technical Field

[0001] This utility model relates to the technical field of equipment for preventing personnel from falling while working at heights, and in particular to a low-cost, easily manufactured iron tower fall prevention passage. Background Technology

[0002] Currently operating power transmission towers generally lack fall protection devices, and the structural characteristics of the towers themselves make it impossible for workers to use existing protective equipment for effective fall protection. This results in workers not having reliable fall protection measures when climbing up and down the towers, posing a great risk to their personal safety.

[0003] Existing technology typically involves installing foot spikes on the towers of power transmission lines for climbing, and setting some protective measures on the sides of the foot spikes. However, these measures are often ineffective, and climbers often have accidents due to their feet slipping during the climb. When workers are going up or down the tower or moving around on the tower, if the hooks of their safety belts are attached to the foot spikes, they will also slip off and lose their protective effect.

[0004] In addition, the existing foot spikes have a relatively smooth surface, which makes it easy for climbers to slip when stepping on them, resulting in a loss of grip and a fall from the tower. When workers are climbing, they need to put the safety buckle on the foot spikes while climbing, which is extremely inconvenient. Moreover, the safety buckle is also prone to slipping after installation, which increases the risk and danger of the operation. These problems not only affect the efficiency of the operation, but also seriously threaten the life safety of the workers. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] This utility model provides a low-cost, easily manufactured iron tower fall protection channel to overcome the problems of insufficient safety guarantee for operators when climbing, and the inconvenience of installing traditional safety buckles.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides a low-cost, easily manufactured iron tower fall arrestor, comprising: several right-hand spiral wing type quick-release foot spikes, several left-hand spiral wing type quick-release foot spikes, a channel pulley, and a speed difference fall arrestor;

[0009] The plurality of right-hand spiral quick-release feet are vertically arranged on the right side of the tower support column, and the right-hand spiral quick-release feet are connected to the tower support column through a plurality of fixing nuts. The plurality of left-hand spiral quick-release feet are vertically arranged on the left side of the tower support column, and the left-hand spiral quick-release feet are connected to the tower support column through a plurality of fixing nuts.

[0010] The channel pulley is located at the bottom end of the tower support column, and the speed difference fall arrestor is sleeved on the outer wall of the tower support column;

[0011] The right-hand spiral quick-release foot spike includes: a right-hand spiral quick-release foot spike body, a right-hand spiral quick-release foot spike connecting screw at the left end of the right-hand spiral quick-release foot spike body, and a right-hand spiral quick-release device at the right end of the right-hand spiral quick-release foot spike body;

[0012] The left-hand spiral quick-release foot nail includes: a left-hand spiral quick-release foot nail body, a left-hand spiral quick-release foot nail connecting screw at the right end of the left-hand spiral quick-release foot nail body, and a left-hand spiral quick-release device at the left end of the left-hand spiral quick-release foot nail body;

[0013] The channel pulley includes a pulley connecting rod, which has a Y-shaped structure. The outer wall of the left end of the pulley connecting rod is threaded, and the right end of the pulley connecting rod is provided with a pulley assembly.

[0014] Preferably, the plurality of right-hand spiral quick-release feet are arranged at equal intervals on the right side of the tower support column, and the distance between two adjacent right-hand spiral quick-release feet is 0.9m-1.1m.

[0015] Preferably, the plurality of left-hand spiral quick-release feet are arranged at equal intervals on the left side of the tower support column, and the distance between two adjacent left-hand spiral quick-release feet is 0.9m-1.1m.

[0016] Preferably, the main body of the right-hand spiral wing quick-release foot nail is a cylindrical structure, and the outer wall of the main body of the right-hand spiral wing quick-release foot nail is provided with diamond-shaped anti-slip texture;

[0017] The main body of the left-hand spiral quick-release foot nail is a cylindrical structure, and the outer wall of the main body of the left-hand spiral quick-release foot nail is provided with diamond-shaped anti-slip texture.

[0018] Preferably, the right-hand spiral quick-release pin body and the right-hand spiral quick-release pin connecting screw are integrally formed, and the length of the right-hand spiral quick-release pin connecting screw is greater than one-half the length of the right-hand spiral quick-release pin body;

[0019] The main body of the left-hand spiral quick-release foot nail and the connecting screw of the left-hand spiral quick-release foot nail are integrated into one piece, and the length of the connecting screw of the left-hand spiral quick-release foot nail is greater than half the length of the main body of the left-hand spiral quick-release foot nail.

[0020] Preferably, the right-hand spiral quick-release foot bolt connecting screw is inserted into the tower support column, and several fixing nuts are fitted on the right-hand spiral quick-release foot bolt connecting screw;

[0021] The left-hand spiral quick-release foot bolt connecting screw is inserted into the tower support column, and several fixing nuts are fitted on the left-hand spiral quick-release foot bolt connecting screw.

[0022] Preferably, the pulley assembly is arranged perpendicularly to the pulley connecting rod, and the pulley assembly includes: a pulley body, the pulley body having a U-shaped structure, and the bottom end of the U-shaped structure being fixedly connected to the pulley connecting rod;

[0023] The upper end of the pulley body is provided with a rotating shaft, the rotating shaft is inserted into the pulley body, the outer wall of the rotating shaft is fitted with a pulley, and the left outer wall of the rotating shaft is fitted with a locking nut;

[0024] The left end of the rotating shaft is provided with a fixing pin, which is inserted into the rotating shaft.

[0025] Preferably, the right-hand spiral quick-release device has a right-hand spiral structure, and the right-hand spiral quick-release device and the right-hand spiral quick-release foot nail body are integrated into one piece;

[0026] The angle between the bottom and top edges of the right-hand helical structure is 55-75°, and the inner diameter of the top edge of the right-hand helical structure is larger than the inner diameter of the bottom edge.

[0027] Preferably, the left-hand spiral quick-release device is a left-hand spiral structure, and the left-hand spiral quick-release device and the left-hand spiral quick-release foot nail body are integrated into one piece;

[0028] The angle between the bottom and top edges of the left-hand spiral structure is 55-75°, and the inner diameter of the top edge of the left-hand spiral structure is larger than the inner diameter of the bottom edge.

[0029] Preferably, the pulley is a grooved pulley.

[0030] (III) Beneficial Effects

[0031] This utility model provides a low-cost and easy-to-manufacture iron tower anti-fall channel, which can be formed by installing right-hand spiral wing quick-release foot nails, left-hand spiral wing quick-release foot nails and channel pulleys on the outer wall of the iron tower support column and combining them with a speed difference fall arrestor to form an anti-fall channel;

[0032] The left and right helical quick-release foot spikes are respectively equipped with right and left helical quick-release devices on their outer sides. Both the right and left helical quick-release devices are helical structures, which form an angle between the bottom and top edges of the helical structure. This angle allows the operator to easily feed the safety rope into the quick-release device when climbing the tower. After the safety rope enters the quick-release device, the top edge of the helical structure limits the safety rope, so that the operator does not need to wear a traditional safety ring, reducing the difficulty of operation and reducing the physical exertion during tower climbing.

[0033] The right-hand spiral quick-release device and the left-hand spiral quick-release device can laterally limit the operator's feet when the operator is climbing the tower, preventing the feet from slipping and sliding outwards during winter and rainy season operations.

[0034] The channel pulley is installed at the bottom of the tower support column. The channel pulley is used to cooperate with the safety rope in the differential speed fall arrestor to guide the movement of the safety rope and reduce the impact of the differential speed fall arrestor swaying when operators are wearing safety ropes to climb the tower. Attached Figure Description

[0035] Figure 1 This invention provides a schematic diagram of a low-cost, easily manufactured iron tower anti-fall passage structure.

[0036] Figure 2 Show Figure 1 Partial schematic diagram of section A;

[0037] Figure 3 This diagram shows a top view of the right-hand spiral-shaped quick-release foot bolt.

[0038] Figure 4 This diagram shows a side view of the right-hand spiral-wing type quick-release foot pin structure.

[0039] Figure 5 This diagram shows a top view of the left-hand spiral-shaped quick-release foot pin structure.

[0040] Figure 6 This diagram shows a side view of the left-hand spiral-wing type quick-release foot pin structure.

[0041] Figure 7 A schematic diagram of the channel pulley structure is shown.

[0042] The components are as follows: 1: Tower support column; 2: Right-hand spiral quick-release foot pin; 21: Right-hand spiral quick-release foot pin connecting screw; 22: Right-hand spiral quick-release foot pin body; 23: Right-hand spiral quick-release device; 3: Left-hand spiral quick-release foot pin; 31: Left-hand spiral quick-release foot pin connecting screw; 32: Left-hand spiral quick-release foot pin body; 33: Left-hand spiral quick-release device; 4: Channel pulley; 41: Pulley connecting rod; 42: Pulley body; 43: Rotating shaft; 44: Pulley; 45: Locking nut; 46: Fixing pin; 5: Speed ​​difference fall arrestor; 6: Fixing nut. Detailed Implementation

[0043] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] In the description of this utility model, it is necessary to understand that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "top", and "bottom" are all based on the orientation or positional relationship shown in the accompanying drawings. The purpose is only to facilitate the description of this utility model and simplify the description, and is not intended to indicate or imply that the indicated component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0045] like Figure 1-7 As shown, this utility model provides a low-cost and easy-to-manufacture iron tower fall arresting channel, including: several right-hand spiral wing type quick-release foot spikes 2, several left-hand spiral wing type quick-release foot spikes 3, channel pulleys 4, and speed difference fall arrestor 5;

[0046] The several right-hand spiral quick-release anchors 2 are vertically installed on the right side of the tower support column 1. The several right-hand spiral quick-release anchors 2 are arranged at equal intervals on the right side of the tower support column 1. The distance between two adjacent right-hand spiral quick-release anchors 2 is 0.9m-1.1m. The right-hand spiral quick-release anchors 2 are connected to the tower support column 1 by several fixing nuts 6.

[0047] It should be noted that when fixing the right-hand spiral quick-release foot nail 2 to the tower support column 1, three fixing nuts 6 are usually used. Two of the three fixing nuts 6 are placed on the inner side of the tower support column 1, and one is placed on the outer wall of the tower support column 1. The use of three fixing nuts prevents the right-hand spiral quick-release foot nail 2 from rotating during use.

[0048] The plurality of left-hand spiral quick-release pins 3 are vertically arranged on the left side of the tower support column 1. The plurality of left-hand spiral quick-release pins 3 are arranged at equal intervals on the left side of the tower support column 1. The distance between two adjacent left-hand spiral quick-release pins 3 is 0.9m-1.1m. The left-hand spiral quick-release pins 3 are connected to the tower support column 1 through a plurality of fixing nuts 6.

[0049] It should be noted that when fixing the left-hand spiral quick-release foot nail 3 to the tower support column 1, three fixing nuts 6 are usually used. Two of the three fixing nuts 6 are placed on the inner side of the tower support column 1, and one is placed on the outer wall of the tower support column 1. The use of three fixing nuts prevents the left-hand spiral quick-release foot nail 3 from rotating during use.

[0050] When the right-hand spiral quick-release foot spike 2 and the left-hand spiral quick-release foot spike 3 are installed on the tower support column 1, they are arranged in a cross pattern to facilitate the climb of the operator.

[0051] The right-hand spiral quick-release pin 2 includes: a right-hand spiral quick-release pin body 22, with a right-hand spiral quick-release pin connecting screw 21 at the left end of the right-hand spiral quick-release pin body 22 and a right-hand spiral quick-release device 23 at the right end of the right-hand spiral quick-release pin body 22. The left-hand spiral quick-release pin 3 includes: a left-hand spiral quick-release pin body 32, with a left-hand spiral quick-release pin connecting screw 31 at the right end of the left-hand spiral quick-release pin body 32 and a left-hand spiral quick-release device 33 at the left end of the left-hand spiral quick-release pin body 32.

[0052] The right helical quick-release foot bolt connecting screw 21 and the left helical quick-release foot bolt connecting screw 31 are used to cooperate with the fixing nut 6 to fix the right helical quick-release foot bolt 2 and the left helical quick-release foot bolt 3 on the tower support column 1.

[0053] The right-hand spiral quick-release foot spike body 22 and the right-hand spiral quick-release foot spike connecting screw 21 adopt an integrated design to ensure the stability and strength of the structure. The length of the right-hand spiral quick-release foot spike connecting screw 21 is greater than half the length of the right-hand spiral quick-release foot spike body 22, so that the extension length of the right-hand spiral quick-release foot spike 2 can be adjusted. The right-hand spiral quick-release foot spike body 22 is a cylindrical structure, and the outer wall of the right-hand spiral quick-release foot spike body 22 is provided with diamond-shaped anti-slip texture, which can effectively increase friction and prevent workers from slipping during climbing, thereby improving safety.

[0054] The left-hand spiral quick-release foot spike body 32 and the left-hand spiral quick-release foot spike connecting screw 31 adopt an integrated design to ensure the stability and strength of the structure. The length of the left-hand spiral quick-release foot spike connecting screw 31 is greater than half the length of the left-hand spiral quick-release foot spike body 32, so that the extension length of the left-hand spiral quick-release foot spike 3 can be adjusted. The left-hand spiral quick-release foot spike body 32 is a cylindrical structure, and the outer wall of the left-hand spiral quick-release foot spike body 32 is provided with diamond-shaped anti-slip texture, which can effectively increase friction and prevent workers from slipping during climbing, thereby improving safety.

[0055] The right-hand spiral quick-release device 23 has a right-hand spiral structure and is integrated with the right-hand spiral quick-release foot nail body 22. The angle between the bottom and top edges of the right-hand spiral structure is 55-75°, and the inner diameter of the top edge of the right-hand spiral structure is larger than the inner diameter of the bottom edge. The left-hand spiral quick-release device 33 has a left-hand spiral structure and is integrated with the left-hand spiral quick-release foot nail body 32. The angle between the bottom and top edges of the left-hand spiral structure is 55-75°, and the inner diameter of the top edge of the left-hand spiral structure is larger than the inner diameter of the bottom edge.

[0056] From a side view, the right-hand helix structure is a Z-shaped structure. The angle between the bottom and top edges of the right-hand helix structure is 55-75°. This angle allows the safety rope to easily enter the center of the right-hand helix structure. From a top view, the right-hand helix structure is a P-shaped structure. When the safety rope enters the center of the right-hand helix structure, because the inner diameter of the top edge of the right-hand helix structure is larger than the inner diameter of the bottom edge, the top edge of the right-hand helix structure can limit the safety rope at the center of the helix structure, preventing the safety rope from coming out of the right-hand helix structure.

[0057] From a side view, the left-hand helical structure appears as a Z-shape. The angle between the bottom and top edges of the left-hand helical structure is 55-75°, which allows the safety rope to easily enter the center of the left-hand helical structure. From a top view, the left-hand helical structure appears as a P-shape. When the safety rope enters the center of the left-hand helical structure, the top edge of the left-hand helical structure can limit the safety rope located at the center of the helical structure because the inner diameter of the top edge is larger than the inner diameter of the bottom edge, thus preventing the safety rope from coming out of the left-hand helical structure.

[0058] During operation, the angle formed by the top and bottom edges of the spiral structure of the right helical quick-release device 23 and the left helical quick-release device 33 can laterally limit the operator's feet when climbing the tower, preventing the feet from slipping and falling to the outside during tower climbing operations in winter and rainy season.

[0059] Both the right-hand spiral wing quick-release foot 2 and the left-hand spiral wing quick-release foot 3 are made of alloy steel, and their outer surfaces have a galvanized coating. The main function of the galvanized coating is to prevent the steel from corroding and rusting, and to improve its weather resistance and service life.

[0060] The channel pulley 4 is located at the bottom end of the tower support column 1. The channel pulley 4 includes a pulley connecting rod 41, which has a Y-shaped structure. The Y-shaped structure is used for welding the pulley assembly. The Y-shaped structure increases the contact area, making the pulley assembly more stable. The outer wall of the left end of the pulley connecting rod 41 is provided with threads, which are used to cooperate with the fixing nut 6 to firmly fix the pulley connecting rod 41 to the outer wall of the tower support column 1. The right end of the pulley connecting rod 41 is provided with a pulley assembly.

[0061] The pulley assembly is perpendicular to the pulley connecting rod 41. The pulley assembly includes: a pulley body 42, which is a U-shaped structure. The bottom end of the U-shaped structure is fixedly connected to the pulley connecting rod 41. A rotating shaft 43 is provided at the upper end of the pulley body 42. The rotating shaft 43 is inserted into the pulley body 42. A pulley 44 is sleeved on the outer wall of the rotating shaft 43. The pulley 44 is a grooved pulley. The grooved pulley can effectively guide the rope and reduce the slippage and wear of the rope during use.

[0062] A locking nut 45 is fitted on the outer left side of the rotating shaft 43. The locking nut 45 can effectively fix the rotating shaft 43 and prevent it from loosening or falling off during use. A fixing pin 46 is provided at the left end of the rotating shaft 43. The fixing pin 46 is inserted into the rotating shaft 43 to further increase the stability of the rotating shaft 43.

[0063] The upper end of the differential fall arrestor 5 is fixed with a rope loop around the outer wall of the tower support column 1. The lower end of the differential fall arrestor 5 is inserted into the through hole between the pulley 44 and the pulley body 42. The channel pulley 4 can guide the safety rope of the differential fall arrestor 5, reducing the impact of the gravity generated by the swaying of the differential fall arrestor 5 on the tower climbers.

[0064] Taking the right-hand spiral wing quick-release foot spike as an example, in actual work, the operator needs to put the fixing rope of the speed difference fall arrestor 5 on the outer wall of the iron tower support column 1 and fix it, insert the safety rope at the lower end of the speed difference fall arrestor 5 through the through hole between the pulley 44 and the pulley body 42, and connect one end of the safety rope of the speed difference fall arrestor 5 from the front of the body to the back.

[0065] When performing tower climbing operations, the operator needs to hold a safety rope in front of them. Each time they climb up a section of foot spikes, the safety rope is guided along the spiral structure into the center of the right-hand spiral quick-release device 23. When the operator climbs to mid-air, the safety rope forms a vertical line and passes through several right-hand spiral quick-release foot spikes 2 in sequence. In the event of a fall, the spiral structure of the right-hand spiral quick-release device 23 limits the safety rope to prevent the operator from falling.

[0066] It is understood that the above-mentioned embodiments mentioned in this utility model can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this utility model will not elaborate further.

[0067] Those skilled in the art will understand that, in the above-described method of the specific implementation, the order in which each step is written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0068] This utility model provides a low-cost, easy-to-manufacture iron tower anti-fall channel, which is formed by installing a right helical wing quick-release foot nail 2, a left helical wing quick-release foot nail 3 and a channel pulley 4 on the outer wall of the iron tower support column 1 and combining them with a speed difference fall arrestor 5.

[0069] The left helical quick-release foot spike 3 and the right helical quick-release foot spike 2 are respectively equipped with a right helical quick-release device 23 and a left helical quick-release device 33 on their outer sides. Both the right helical quick-release device 23 and the left helical quick-release device 33 are helical structures, which make an angle between the bottom edge and the top edge of the helical structure. This angle allows the operator to easily feed the safety rope into the quick-release device when climbing the tower. After the safety rope enters the quick-release device, the top edge of the helical structure limits the safety rope, so that the operator does not need to wear a traditional safety ring when working, reducing the difficulty of operation and reducing the physical consumption during tower climbing.

[0070] The right-hand propeller-type quick-release device 23 and the left-hand propeller-type quick-release device 33 can laterally limit the operator's feet when the operator is climbing the tower, preventing the feet from slipping and sliding outwards during winter and rainy season operations.

[0071] The channel pulley 4 is installed at the bottom of the tower support column 1. The channel pulley 4 is used to cooperate with the safety rope in the speed difference fall arrestor 5 to guide the movement of the safety rope and reduce the impact of the speed difference fall arrestor 5 swaying when the operator directly wears the safety rope to climb the tower.

[0072] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A low cost, easy to fabricate, iron tower fall arrest passage, characterized in that, The utility model relates to a right screw airfoil quick fastening foot nail, left screw airfoil quick fastening foot nail, channel pulley and speed difference anti -fall device for tower support column, The right screw airfoil quick fastening foot nail (2) is vertically arranged on the right side of the tower support column (1), and the right screw airfoil quick fastening foot nail (2) is connected with the tower support column (1) through the fixing nut (6); the left screw airfoil quick fastening foot nail (3) is vertically arranged on the left side of the tower support column (1), and the left screw airfoil quick fastening foot nail (3) is connected with the tower support column (1) through the fixing nut (6); The channel pulley (4) is arranged at the bottom end of the tower support column (1), and the speed difference anti -fall device (5) is sleeved on the outer wall of the tower support column (1); The right screw airfoil quick fastening foot nail (2) comprises a right screw airfoil quick fastening foot nail body (22), a right screw airfoil quick fastening foot nail connecting screw rod (21) arranged at the left end of the right screw airfoil quick fastening foot nail body (22), and a right screw airfoil quick fastening device (23) arranged at the right end of the right screw airfoil quick fastening foot nail body (22); The left screw airfoil quick fastening foot nail (3) comprises a left screw airfoil quick fastening foot nail body (32), a left screw airfoil quick fastening foot nail connecting screw rod (31) arranged at the right end of the left screw airfoil quick fastening foot nail body (32), and a left screw airfoil quick fastening device (33) arranged at the left end of the left screw airfoil quick fastening foot nail body (32); The channel pulley (4) comprises a pulley connecting rod (41) in Y-shaped structure, a thread arranged at the left end of the pulley connecting rod (41), and a pulley assembly arranged at the right end of the pulley connecting rod (41). The right screw airfoil quick fastening foot nails (2) are arranged at equal distances on the right side of the tower support column (1), and the distance between two adjacent right screw airfoil quick fastening foot nails (2) is 0.9m-1.1m.

2. The low cost, easy-to-build, iron tower fall arrest accessway of claim 1, wherein, The left screw airfoil quick fastening foot nails (3) are arranged at equal distances on the left side of the tower support column (1), and the distance between two adjacent left screw airfoil quick fastening foot nails (3) is 0.9m-1.1m.

3. The low cost, easy-to-build, iron tower fall arrest accessway of claim 2, wherein, The right screw airfoil quick fastening foot nail body (22) is in cylindrical structure, and the outer wall of the right screw airfoil quick fastening foot nail body (22) is provided with diamond-shaped anti -slip lines; 4. The low cost, easy-to-build, iron tower fall arrest accessway of claim 1, wherein, The left screw airfoil quick fastening foot nail body (32) is in cylindrical structure, and the outer wall of the left screw airfoil quick fastening foot nail body (32) is provided with diamond-shaped anti -slip lines. The right screw airfoil quick fastening foot nail body (22) and the right screw airfoil quick fastening foot nail connecting screw rod (21) are integrated, and the length of the right screw airfoil quick fastening foot nail connecting screw rod (21) is greater than one -half of the length of the right screw airfoil quick fastening foot nail body (22).

5. The low cost, easy-to-build, iron tower fall arrest accessway of claim 1, wherein, The left screw airfoil quick fastening foot nail body (32) and the left screw airfoil quick fastening foot nail connecting screw rod (31) are integrated, and the length of the left screw airfoil quick fastening foot nail connecting screw rod (31) is greater than one -half of the length of the left screw airfoil quick fastening foot nail body (32). ​ 6. The low cost, easy-to-fabricate, iron tower fall arrest accessway of claim 5, wherein, The right helical wing type fast buckle foot nail connecting screw rod (21) is inserted into the iron tower support column (1), and a plurality of fixing nuts (6) are sleeved on the right helical wing type fast buckle foot nail connecting screw rod (21); The left helical wing type fast buckle foot nail connecting screw rod (31) is inserted into the iron tower support column (1), and a plurality of fixing nuts (6) are sleeved on the left helical wing type fast buckle foot nail connecting screw rod (31).

7. The low cost, easy-to-build, iron tower fall arrest accessway of claim 1, wherein, The pulley assembly is vertically arranged with the pulley connecting rod (41), and the pulley assembly comprises a pulley body (42) which is in a U-shaped structure and is fixedly connected with the pulley connecting rod (41) at the bottom end of the U-shaped structure; A rotating shaft (43) is arranged at the upper end of the pulley body (42) and is inserted into the pulley body (42), and a pulley (44) is sleeved on the outer wall of the rotating shaft (43), and a locking nut (45) is sleeved on the left outer wall of the rotating shaft (43); A fixing pin (46) is arranged at the left end of the rotating shaft (43) and is inserted into the rotating shaft (43).

8. The low cost, easy-to-build, iron tower fall arrest accessway of claim 1, wherein, The right helical wing type fast buckle device (23) is in a right helical structure and is integrally formed with the right helical wing type fast buckle foot nail body (22). The included angle between the bottom edge and the top edge of the right helical structure is 55-75°, and the inner diameter of the top edge of the right helical structure is greater than the inner diameter of the bottom edge.

9. The low-cost, easy-to-fabricate, iron-pylon fall-prevention passageway of claim 8, wherein, The left helical wing type fast buckle device (33) is in a left helical structure and is integrally formed with the left helical wing type fast buckle foot nail body (32). The included angle between the bottom edge and the top edge of the left helical structure is 55-75°, and the inner diameter of the top edge of the left helical structure is greater than the inner diameter of the bottom edge.

10. The low cost, easy-to-fabricate, iron tower fall arrest accessway of claim 7, wherein, The pulley (44) is a groove pulley.

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