A fall arrest device for nuclear power plant construction

Abstract

This invention discloses a fall arrest device for nuclear power plant construction, belonging to the field of construction protection. It includes an installation mechanism with a winding mechanism at its front; a connecting mechanism is located at the front of and below the winding mechanism; the installation mechanism includes an installation plate, with two connector heads fixedly connected to the lower front surface and two connector heads fixedly connected to the upper front surface; shafts are fixedly connected to both sides of each connector head, and a concave component is rotatably connected to the outer walls of two adjacent shafts located outside the connector heads via a rotating shaft. Compared to existing fall arrest mechanisms that require disassembly and installation using multiple bolts, this device significantly simplifies the installation process through an integrated structural design and a linked operation mechanism. During the deployment and fixing of the device, no cumbersome bolt disassembly or assembly is required; the core operation can be completed simply by rotating a knob.

Description

Technical Field

[0001] This invention relates to the field of construction protection, and more particularly to a fall protection device for nuclear power engineering construction. Background Technology

[0002] During the construction and operation of nuclear power projects, the construction scenarios are characterized by high risk, high complexity, and high safety standards. They involve various special working conditions such as high-altitude operations, confined space operations, and radioactive environment operations. The personal safety protection of workers, especially fall protection, is directly related to the safety, stability, and compliance of the project construction and is a core link in the nuclear power project construction safety management system.

[0003] Patent CN114412214B relates to a fall protection mechanism for a construction operation platform. It includes a left and right fixed rod arranged vertically side-by-side at intervals, with a connecting plate installed between them. The fixed plate is fixedly mounted on the bottom front of both the left and right fixed rods. A fall protection component is fixedly connected to the front of the fixed plate. The fall protection component includes a fall protection frame on the front of the fixed plate, with a fall protection net at the bottom of the frame. Support components connected to the fall protection frame are fixedly mounted on the top front of both the left and right fixed rods. Each support component includes symmetrically arranged connecting blocks on the top front of either the left or right fixed rod, with support strips hinged to the connecting blocks and fixedly connected at an angle to the fall protection frame. The device is connected to the construction scaffolding via the fixed rods. The fall protection component allows personnel or objects to be caught by the fall protection net, and the support components increase the strength of the fall protection frame.

[0004] The devices described above require disassembly and assembly via multiple bolts, making installation inconvenient and preventing integrated design that facilitates folding and storage. Furthermore, the fixed height after installation makes these devices unsuitable for adjustment, resulting in poor applicability. Therefore, we propose a fall protection device for nuclear power engineering construction. Summary of the Invention

[0005] Purpose of the Invention: The purpose of this invention is to provide a fall arrest device for nuclear power engineering construction, which solves the problem of inconvenience caused by the need for disassembly and installation of fall arrest mechanisms in building construction through multiple bolts. At the same time, it realizes the integrated design of the device, which has a folding and storage function, reduces the storage space when the device is not in use, and achieves the effect of easy placement and transportation. Furthermore, it can flexibly adjust the height of the device after installation according to the height requirements of different working scenarios in nuclear power engineering construction, improve the applicability of the device in nuclear power construction, and avoid the protection limitations caused by a fixed height.

[0006] Technical solution: A fall arrest device for nuclear power engineering construction, including an installation mechanism, wherein a winding mechanism is provided in front of the installation mechanism;

[0007] A connecting mechanism is provided in front of the installation mechanism and below the winding mechanism;

[0008] The mounting mechanism includes a mounting plate, with two connector heads fixedly connected to the lower front surface of the mounting plate and two connector heads fixedly connected to the upper front surface of the mounting plate. A shaft is fixedly connected to both sides of each connector head, and a concave part is rotatably connected to the outer side wall of two adjacent shafts located outside the connector head through a rotating shaft. A storage strip is fixedly connected to the top of the concave part.

[0009] A screw is rotatably connected to the inner side of the storage strip located on the left side of the front surface of the mounting plate via a pivot. A screw block is threadedly connected to the inner side of the screw. A vertical rod is fixedly connected to the inner side of the storage strip located on the right side of the front surface of the mounting plate. A slider is slidably connected to the inner side of the vertical rod. Connector three is fixedly connected to the rear surface of both the screw block and the rear surface of the slider. Traction rods are rotatably connected to both sides of connector three and connector two, which are opposite each other, via a pivot.

[0010] Furthermore, gear 1 is fixedly connected to the outer walls of the two opposing shafts on both sides of the two concave parts. Gear 2 is meshed with the upper side of the outer wall of gear 1. Gear 2 is rotatably connected to the opposite side of the concave parts via a rotating shaft. A shaft is rotatably connected to the upper side of the two opposite sides of the two storage strips via a rotating shaft. A transmission wheel is fixedly connected to the opposite ends of the two shafts and the opposite sides of the two gears 2. A transmission belt is connected to the outer walls of the two opposing transmission wheels.

[0011] Furthermore, the rear surface of the mounting plate has two vertical grooves, and a limiting rod is fixedly connected inside the vertical groove. A buffer block is slidably connected to the outer wall of the limiting rod, and a spring is fixedly connected to the buffer block on the opposite side of the vertical groove and outside the limiting rod.

[0012] Furthermore, a lifting block is fixedly connected to the rear surface of the buffer block. A screw rod is threadedly connected inside the lifting block located on the right side of the rear surface of the mounting plate. A guide rod is slidably connected inside the lifting block located on the left side of the rear surface of the mounting plate. Fixed seats are symmetrically fixedly connected to both sides of the rear surface of the mounting plate. The top and bottom ends of the screw rod are rotatably connected to the two fixed seats located on opposite sides via a rotating shaft. The top end of the screw rod extends through to the top of the fixed seat and is fixedly connected to a knob. The two ends of the guide rod are fixedly connected to the two fixed seats located on opposite sides. The outer walls of the two fixed seats on the same side are jointly fixedly connected to a mounting seat.

[0013] Furthermore, the top end of the screw one extends through to the top of the storage strip and is fixedly connected to a knob two.

[0014] Furthermore, the winding mechanism includes two storage cylinders, and a side plate is fixedly connected to the left side of both storage cylinders. The upper surface of the side plate is fixedly connected to the right end of the shaft located to the left of the front surface of the mounting plate. A winding rod is rotatably connected to the inside right side of the storage cylinder via a rotating shaft. A fall protection net is fixedly wound onto the outer wall of the winding rod. The front end of the fall protection net extends through to the front of the storage cylinder and is fixedly connected to a connecting ring.

[0015] Furthermore, a second side plate is provided on the right side of both storage tubes. The right end of the winding rod extends through to the right side of the storage tube and is rotatably connected to the second side plate via a pivot. A third gear is fixedly connected to the outer wall of the winding rod between the storage tube and the second side plate. A fourth gear meshes between the two third gears. The fourth gear is rotatably connected to the opposite side of the second side plate via a pivot. The right end of the shaft located on the right side of the front surface of the mounting plate is fixedly connected to the right end of the winding rod located above the front surface of the mounting plate.

[0016] Furthermore, the connecting mechanism includes two horizontal bars. The rear surface of each horizontal bar is fixedly connected to the front surface of the mounting plate. Each of the two horizontal bars has a pressure bar on its opposite sides. Each of the two pressure bars has a movable column symmetrically fixedly connected to its opposite sides. The ends of the two opposite movable columns, away from the pressure bars, penetrate the horizontal bars and are jointly fixedly connected to the movable bar. L-shaped baffles are fixedly connected to the opposite sides of the horizontal bars and on both sides of the pressure bars. A connecting column is symmetrically fixedly connected to the movable bar on its side closest to the horizontal bars. The end of the connecting column away from the movable bar penetrates the horizontal bars and contacts the inner side of the L-shaped baffle. Multiple springs are fixedly connected between the pressure bars and the movable bars.

[0017] Furthermore, a double-headed cam is provided between the two pressure bars, and the rear surface of the double-headed cam is rotatably connected to the front surface of the mounting plate via a rotating shaft. A knob is fixedly connected to the front surface of the double-headed cam.

[0018] Beneficial effects: Compared to existing fall arrest mechanisms that require disassembly and installation through multiple bolts, this device significantly simplifies the installation process through its integrated structural design and linkage operation mechanism. During the deployment and fixing of the device, there is no need for cumbersome bolt disassembly and assembly; the core operation can be completed simply by turning a knob.

[0019] Rotating knob two controls the storage strip to change from a vertically folded state to a horizontally unfolded state, while rotating knob three allows for quick movement and resetting of the connecting column, thus completing the connection and fixation of the fall protection net. The entire operation process requires no additional tools and can be completed by a single person, effectively reducing the labor and time costs of equipment installation in nuclear power engineering construction. It is particularly suitable for the high-paced and high-efficiency work requirements of nuclear power construction, while avoiding installation hazards caused by improper bolt disassembly and assembly.

[0020] This device, based on a multi-component linkage design, achieves integrated folding and storage, perfectly solving the problems of existing technologies where devices cannot be folded in one piece and occupy a large space when idle. When the device is idle, rotating knob two can drive the storage strips to rotate along the axis, retracting them from a horizontally unfolded state to a vertical state parallel to the mounting plate; simultaneously, the winding mechanism automatically completes the winding of the anti-fall net during the folding process, without the need for separate operation of the winding component; gear transmission and transmission belt work together to ensure that the storage strips on both sides fold synchronously, avoiding storage difficulties caused by component misalignment. The folded device has a compact structure and a significantly reduced volume, which not only facilitates neat placement in the limited storage space of nuclear power plant construction sites, but also reduces the space occupied and handling difficulty during transportation, and improves the flexibility of transferring the device between different construction scenarios;

[0021] This device features optimized design in the deployment, connection, and fixing of the fall arrest net, effectively improving the stability and reliability of fall protection. During deployment, gear transmission enables the two winding rods to rotate synchronously, ensuring uniform deployment and consistent tension, avoiding protective gaps caused by uneven deployment on one side. When fixing the net, rotating a knob controls the movement of the connecting posts, facilitating quick installation of the connecting rings. Releasing the knob and the spring's return action ensures the connecting posts tightly abut against the retaining strip, preventing the connecting rings from falling off. This ensures the fall arrest net remains taut throughout construction, effectively catching falling objects.

[0022] To address the shortcomings of existing technologies, such as fixed device height and poor applicability, this device uses knob one to drive screw two to rotate. Screw two engages with the right-side lifting block via a threaded connection, causing the right-side lifting block to move up and down along screw two. Simultaneously, the left-side lifting block slides up and down along the guide rod. The lifting blocks drive the buffer block to move along the limit rod within the vertical groove, adjusting the installed height. If the device is subjected to external impact, the buffer block compresses spring one, causing spring one to elastically deform and absorb the impact energy, thus providing buffer protection and preventing damage to the device from impact, ensuring the stability of protection during nuclear power plant construction. Attached Figure Description

[0023] Figure 1 This is a front view structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0025] Figure 3 This is a rear view structural diagram of the mounting plate of the present invention;

[0026] Figure 4 This is a side view schematic diagram of the connection structure between the storage strip and the traction rod of the present invention;

[0027] Figure 5 This is a rear view schematic diagram of the connection structure between the storage strip and the screw of the present invention;

[0028] Figure 6 This is a rear view schematic diagram of the connection structure between the storage strip and the vertical rod of the present invention;

[0029] Figure 7 This is a schematic diagram of the winding mechanism of the present invention;

[0030] Figure 8 This is a schematic diagram of the connection structure of the winding rod, gear three, gear four and side plate two of the present invention;

[0031] Figure 9 This is a schematic diagram of the connection mechanism of the present invention.

[0032] In the diagram: 1. Mounting mechanism; 2. Winding mechanism; 3. Connecting mechanism; 101. Mounting plate; 102. Connector 1; 103. Connector 2; 104. Shaft; 105. Concave part; 106. Storage strip; 107. Screw 1; 108. Screw block; 109. Vertical rod; 110. Slider; 111. Connector 3; 112. Traction rod; 113. Gear 1; 114. Gear 2; 115. Shaft; 116. Transmission wheel; 117. Transmission belt; 118. Vertical groove; 119. Limiting rod; 120. Buffer block; 121. Spring 1; 12 2. Lifting block; 123. Screw 2; 124. Guide rod; 125. Fixed base; 126. Knob 1; 127. Mounting base; 128. Knob 2; 201. Storage cylinder; 202. Side plate 1; 203. Winding rod; 204. Anti-fall net; 205. Connecting ring; 206. Side plate 2; 207. Gear 3; 208. Gear 4; 301. Horizontal bar; 302. Pressure strip; 303. Movable column; 304. Movable bar; 305. L-shaped stop bar; 306. Connecting column; 307. Double-headed cam; 308. Knob 3; 309. Spring 2. Detailed Implementation

[0033] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example

[0035] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, a fall protection device for nuclear power engineering construction is provided, including an installation mechanism 1;

[0036] The mounting mechanism 1 includes a mounting plate 101. Two connectors 102 are fixedly connected to the lower front surface of the mounting plate 101, and two connectors 203 are fixedly connected to the upper front surface of the mounting plate 101. A shaft post 104 is fixedly connected to both sides of the connector 102. A concave part 105 is rotatably connected to the outer side wall of two adjacent shaft posts 104 located outside the connector 102 via a rotating shaft. A storage strip 106 is fixedly connected to the top of the concave part 105.

[0037] The inner side of the storage strip 106 located on the left side of the front surface of the mounting plate 101 is rotatably connected to a screw 107 via a pivot. The inner side of the screw 107 is threadedly connected to a screw block 108. The inner side of the storage strip 106 located on the right side of the front surface of the mounting plate 101 is fixedly connected to a vertical rod 109. The inner side of the vertical rod 109 is slidably connected to a slider 110. The rear surfaces of the screw block 108 and the rear surfaces of the slider 110 are both fixedly connected to a connector head 111. The two sides of the upper and lower opposite connector head 111 and the two sides of connector head 103 are all rotatably connected to a traction rod 112 via a pivot.

[0038] Gear 113 is fixedly connected to the outer side walls of the two opposing shafts 104 on both sides of the two concave parts 105. Gear 214 is meshed with the upper side of the outer side wall of gear 113. Gear 214 is rotatably connected to the opposite side of the concave part 105 through a rotating shaft. Shaft 115 is rotatably connected to the upper side of the opposite side of the two storage strips 106 through a rotating shaft. Transmission wheel 116 is fixedly connected to the opposite ends of the two shafts 115 and the opposite sides of the two gears 214. A transmission belt 117 is connected to the outer side walls of the two opposing transmission wheels 116.

[0039] The top of screw 107 extends through to the top of storage strip 106 and is fixedly connected to knob 128;

[0040] When the device is in use, the screw 107 is rotated by the hand knob 2 128, which controls the screw block 108 to rise along the screw 107. At this time, under the connection and push of the connector 3 111, the traction rod 112 and the connector 2 103, the storage strip 106 rotates along the outside of the shaft column 104 together with the concave part 105 at the bottom. It moves from a vertical state parallel to the mounting plate 101. At the same time, the traction rod 112 on the right side of the front surface of the mounting plate 101 moves together, so that the storage strip 106 on the right side moves to a horizontal state. It rotates to a horizontal state and is perpendicular to the mounting plate 101. In this way, the storage strip 106 is controlled to be vertical or horizontal, so that the device can be unfolded for use or folded for storage.

[0041] Meanwhile, since gear 113 is fixed, as the concave part 105 rotates, gear 2 114 will rotate along the outside of gear 113, thereby driving shaft 115 to rotate under the transmission of the two transmission wheels 116 and the transmission belt 117.

[0042] like Figure 2 and Figure 3 As shown, two vertical grooves 118 are formed on the rear surface of the mounting plate 101. A limit rod 119 is fixedly connected inside the vertical groove 118. A buffer block 120 is slidably connected to the outer wall of the limit rod 119. A spring 121 is fixedly connected to the buffer block 120 and the opposite side of the vertical groove 118 and located outside the limit rod 119.

[0043] A lifting block 122 is fixedly connected to the rear surface of the buffer block 120. The lifting block 122 located on the right side of the rear surface of the mounting plate 101 is internally threaded with a screw 123. The lifting block 122 located on the left side of the rear surface of the mounting plate 101 is internally slidably connected with a guide rod 124. Fixing seats 125 are fixedly connected symmetrically on both sides of the rear surface of the mounting plate 101. The top and bottom ends of the screw 123 are rotatably connected to the two upper and lower fixing seats 125 respectively through a rotating shaft. The top end of the screw 123 extends through to the top of the fixing seat 125 and is fixedly connected with a knob 126. The two ends of the guide rod 124 are fixedly connected to the two upper and lower fixing seats 125 respectively. The outer side walls of the two fixing seats 125 on the same side are jointly fixedly connected with a mounting seat 127.

[0044] In use, the device is first connected and fixed to the fixed structure in the nuclear power plant construction area via the mounting base 127 to ensure the overall installation of the device is stable. When further fine-tuning of the height of the mounting plate 101 is required, the knob 126 is turned. The knob 126 drives the screw 123 to rotate. The screw 123 engages with the right lifting block 122, causing the right lifting block 122 to move up and down along the screw 123. The left lifting block 122 slides up and down synchronously along the guide rod 124. The lifting block 122 drives the buffer block 120 to move along the limit rod 119 within the vertical groove 118. If the device is subjected to external impact, the buffer block 120 compresses the spring 121. The spring 121 undergoes elastic deformation, absorbing the impact energy and providing buffer protection to prevent damage to the device due to impact, thus ensuring the protective stability during nuclear power plant construction.

[0045] like Figure 7 and Figure 8 As shown, a winding mechanism 2 is provided in front of the installation mechanism 1;

[0046] The winding mechanism 2 includes two storage cylinders 201. The left side of the two storage cylinders 201 is fixedly connected to a side plate 202. The upper surface of the side plate 202 is fixedly connected to the right end of the shaft 115 located on the left side of the front surface of the mounting plate 101. The right side of the inside of the storage cylinder 201 is rotatably connected to a winding rod 203 via a rotating shaft. The outer side wall of the winding rod 203 is fixedly wound with a fall protection net 204. The front end of the fall protection net 204 extends through to the front of the storage cylinder 201 and is fixedly connected to a connecting ring 205.

[0047] A side plate 206 is provided on the right side of both storage cylinders 201. The right end of the winding rod 203 extends through to the right side of the storage cylinder 201 and is rotatably connected to the side plate 206 via a pivot. A gear 3 207 is fixedly connected to the outer wall of the winding rod 203 between the storage cylinder 201 and the side plate 206. A gear 4 208 meshes between the two gears 3 207. The gear 4 208 is rotatably connected to the opposite side of the side plate 206 via a pivot. The right end of the shaft 115 located on the right side of the front surface of the mounting plate 101 is fixedly connected to the right end of the winding rod 203 located above the front surface of the mounting plate 101.

[0048] During the rotation of the shaft 115 located on the left side of the front surface of the mounting plate 101, it will drive the side plate 202 to rotate, so that the side plate 202 is perpendicular to the horizontal storage strip 106 and is in a vertical state, while the opening of the storage tube 201 faces the mounting plate 101.

[0049] Simultaneously, as the device unfolds, the rotation of the right-side shaft 115 drives the upper winding rod 203 to rotate. Simultaneously, the meshing rotation of gears 3 (207) and 4 (208) causes both winding rods 203 to rotate together. This allows the winding rods 203 to gradually unwind the anti-fall net 204 as the device unfolds, facilitating subsequent connection with the connecting mechanism 3. Conversely, when the device moves from unfolded to folded, the anti-fall net 204 can be automatically wound up, further ensuring convenient storage of the device.

[0050] like Figure 9 As shown, a connecting mechanism 3 is provided in front of the mounting mechanism 1 and below the winding mechanism 2;

[0051] The connecting mechanism 3 includes two horizontal bars 301. The rear surface of the horizontal bars 301 is fixedly connected to the front surface of the mounting plate 101. Each of the two horizontal bars 301 has a pressure bar 302 on its opposite side. Each of the two pressure bars 302 has a movable column 303 symmetrically fixedly connected to its opposite side. The ends of the two movable columns 303 that are opposite each other penetrate the horizontal bars 301 and are fixedly connected to a movable bar 304. Each of the horizontal bars 301 and the two sides of the pressure bars 302 has an L-shaped baffle 305 fixedly connected to its opposite side. A connecting column 306 is symmetrically fixedly connected to the side of the movable bar 304 that is close to the horizontal bars 301. The end of the connecting column 306 that is away from the movable bar 304 penetrates the horizontal bars 301 and contacts the inner side of the L-shaped baffle 305. Multiple springs 309 are fixedly connected between the pressure bars 302 and the movable bars 304.

[0052] A double-headed cam 307 is provided between the two pressure bars 302. The rear surface of the double-headed cam 307 is rotatably connected to the front surface of the mounting plate 101 via a rotating shaft. A knob 308 is fixedly connected to the front surface of the double-headed cam 307.

[0053] In use, when it is necessary to strengthen the connection between the connecting mechanism 3 and other construction components or to fix the auxiliary structure of the fall arrest net 204, turn the knob 308. The knob 308 drives the double-headed cam 307 to rotate. The protruding part of the double-headed cam 307 presses the pressure strips 302 on both sides. The pressure strips 302 move in opposite directions. The pressure strips 302 drive the movable column 303 to move. The movable column 303 drives the movable strip 304 to move. The movable strip 304 drives the connecting column 306 away from the L-shaped stop. Move the strip 305 in the direction of the connection. This makes it easier to put the connecting ring 205 onto the corresponding connecting post 306 for connection. Then, release the knob 308. Under the pull of the spring 209, the connecting post 306 abuts against the inside of the L-shaped stop strip 305 again to prevent the connecting ring 205 from falling off after connection. This allows the fall protection net 204 to unfold and achieve the fall protection effect. This method can control the movement of multiple connecting posts 306 by controlling the rotation of the knob 308, and at the same time facilitates the connection of two layers of fall protection net 204.

[0054] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A fall arrest device for nuclear power plant construction, comprising an installation mechanism (1), characterized in that: A winding mechanism (2) is provided in front of the installation mechanism (1); A connecting mechanism (3) is provided in front of the installation mechanism (1) and below the winding mechanism (2); The mounting mechanism (1) includes a mounting plate (101). Two connectors (102) are fixedly connected to the lower front surface of the mounting plate (101). Two connectors (103) are fixedly connected to the upper front surface of the mounting plate (101). A shaft (104) is fixedly connected to both sides of the connector (102). A concave part (105) is rotatably connected to the outer side wall of two adjacent shafts (104) located outside the connector (102) through a rotating shaft. A storage strip (106) is fixedly connected to the top of the concave part (105). The inner side of the storage strip (106) located on the left side of the front surface of the mounting plate (101) is rotatably connected to a screw rod (107) via a pivot. The inner side of the screw rod (107) is threaded with a screw block (108). The inner side of the storage strip (106) located on the right side of the front surface of the mounting plate (101) is fixedly connected to a vertical rod (109). The inner side of the vertical rod (109) is slidably connected to a slider (110). The rear surfaces of the screw block (108) and the rear surfaces of the slider (110) are both fixedly connected to a connector head (111). The two sides of the connector head (111) and the two sides of the connector head (103) are rotatably connected to a traction rod (112) via a pivot. The outer walls of the two opposing shafts (104) are fixedly connected to gear 1 (113) on both sides of the two concave parts (105). Gear 2 (114) is meshed above the outer wall of gear 1 (113). Gear 2 (114) is rotatably connected to the opposite side of the concave part (105) via a rotating shaft. The upper sides of the two storage strips (106) are rotatably connected to shafts (115) via rotating shafts. The opposite ends of the two shafts (115) and the opposite sides of the two gears (114) are fixedly connected to transmission wheels (116). The outer walls of the two opposing transmission wheels (116) are connected to a transmission belt (117). The winding mechanism (2) includes a storage cylinder (201), and there are two storage cylinders (201). The left side of the two storage cylinders (201) is fixedly connected to a side plate (202). The upper surface of the side plate (202) is fixedly connected to the right end of the shaft (115) located to the left of the front surface of the mounting plate (101). The right side of the inside of the storage cylinder (201) is rotatably connected to a winding rod (203) through a rotating shaft. The outer side wall of the winding rod (203) is fixedly wound with a fall protection net (204). The front end of the fall protection net (204) extends through to the front of the storage cylinder (201) and is fixedly connected to a connecting ring (205).

2. The fall arrest device for nuclear power plant construction according to claim 1, characterized in that: The rear surface of the mounting plate (101) has two vertical grooves (118). A limiting rod (119) is fixedly connected inside the vertical groove (118). A buffer block (120) is slidably connected to the outer wall of the limiting rod (119). A spring (121) is fixedly connected to the buffer block (120) on the opposite side of the vertical groove (118) and outside the limiting rod (119).

3. A fall arrestor for nuclear power plant construction according to claim 2, characterized in that: A lifting block (122) is fixedly connected to the rear surface of the buffer block (120). The lifting block (122) located on the right side of the rear surface of the mounting plate (101) is internally threaded with a screw rod (123). The lifting block (122) located on the left side of the rear surface of the mounting plate (101) is internally slidably connected with a guide rod (124). Fixing seats (125) are fixedly connected symmetrically on both sides of the rear surface of the mounting plate (101). The top and bottom ends of the screw rod (123) are rotatably connected to the two fixing seats (125) that are vertically opposite to each other through a rotating shaft. The top end of the screw rod (123) extends through to the top of the fixing seat (125) and is fixedly connected with a knob (126). The two ends of the guide rod (124) are fixedly connected to the two fixing seats (125) that are vertically opposite to each other. The outer walls of the two fixing seats (125) on the same side are jointly fixedly connected with a mounting seat (127).

4. A fall arrestor for nuclear power plant construction according to claim 1, characterized in that: The top end of the screw (107) extends through to the top of the storage strip (106) and is fixedly connected to the knob (128).

5. A fall arrestor for nuclear power plant construction according to claim 1, characterized in that: A side plate 2 (206) is provided on the right side of both storage cylinders (201). The right end of the winding rod (203) extends through to the right side of the storage cylinder (201) and is rotatably connected to the side plate 2 (206) via a rotating shaft. A gear 3 (207) is fixedly connected to the outer wall of the winding rod (203) between the storage cylinder (201) and the side plate 2 (206). A gear 4 (208) meshes between the two gears 3 (207). The gear 4 (208) is rotatably connected to the opposite side of the side plate 2 (206) via a rotating shaft. The left end of the shaft (115) located on the right side of the front surface of the mounting plate (101) is fixedly connected to the right end of the winding rod (203) located above the front surface of the mounting plate (101).

6. A fall arrestor for nuclear power plant construction according to claim 1, characterized in that: The connecting mechanism (3) includes two horizontal bars (301). The rear surface of each horizontal bar (301) is fixedly connected to the front surface of the mounting plate (101). Each of the two horizontal bars (301) has a pressure bar (302) on its opposite side. Each of the two pressure bars (302) has a movable column (303) symmetrically fixedly connected to its opposite side. The ends of the two movable columns (303) that are opposite each other on the left and right sides pass through the horizontal bars (301) at the ends away from the pressure bars (302) and are fixedly connected to the movable bar. (304) On the opposite side of the horizontal bar (301) and on both sides of the pressure bar (302), L-shaped baffles (305) are fixedly connected. On the side of the movable bar (304) close to the horizontal bar (301), a connecting post (306) is symmetrically fixedly connected. The end of the connecting post (306) away from the movable bar (304) passes through the horizontal bar (301) and contacts the inner side of the L-shaped baffle (305). A plurality of springs (309) are fixedly connected between the pressure bar (302) and the horizontal bar (301).

7. A fall arrestor for nuclear power plant construction according to claim 6, characterized in that: A double-headed cam (307) is provided between the two pressure bars (302). The rear surface of the double-headed cam (307) is rotatably connected to the front surface of the mounting plate (101) via a rotating shaft. A knob three (308) is fixedly connected to the front surface of the double-headed cam (307).

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