Temporary guardrail for bottom plate of lock chamber of ship lock

Abstract

The invention provides a ship lock chamber bottom plate temporary guardrail, and belongs to the technical field of ship lock engineering temporary guardrails. Comprising a first protective fence body and a second protective fence body, connecting rods are arranged at the rear ends of the first protective fence body and the second protective fence body, and fixing rods are arranged at the bottom ends of the interiors of the connecting rods; the fixing mechanism is arranged at the top end of the fixing rod, and the fixing mechanism comprises a first connecting block. U-shaped steel is fixed, then the first protective fence body and the second protective fence body can be fixed to the edge of the ship lock body through the U-shaped steel, finally, the U-shaped steel is inserted into gaps and insertion holes of a reinforcement cage, and then a gear is rotated to enable a first insertion block to enter a square hole; therefore, the first protective fence body and the second protective fence body can be fixed to the edge of the ship lock main body under the condition that an anchoring structure does not need to be knocked in, and concrete is prevented from cracking or being damaged or performance is prevented from being reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of temporary guardrails for ship lock projects, in particular to a temporary guardrail for a bottom plate of a ship lock chamber. Background Art

[0002] The construction of the lock chamber bottom plate of the main project of the ship lock is a large-volume concrete project. The concrete construction usually adopts the skipping method, weaving steel cages in sections and pouring in sections. Since the top surface of the lock chamber bottom plate is usually high and the construction duration is relatively long, workers need to walk frequently on the top surface of the steel cage during the construction process. There is a risk of falling from a high place on the side of the edge, and a temporary guardrail is urgently needed for edge protection;

[0003] Limited by the durability design requirements of the lock chamber, the temporary guardrail cannot be set up by pre-embedding the guardrail foundation connection structure in the lock chamber bottom slab concrete, driving the guardrail foundation into the ground concrete cushion layer, and welding the guardrail to the post-cast steel cage. Therefore, the core of the lock chamber bottom slab edge protection lies in the connection method between the temporary guardrail body and the post-cast steel cage.

[0004] U-shaped steel bolted structures are often used for connection in current projects. However, due to the large width of the lock chamber floor, in order to meet the horizontal thrust requirements specified in the standard specifications, nearly 30 U-shaped steels are required for bolting and fixing every 12 meters of temporary guardrails, and each U-shaped steel has 2 bolts, which need to be bolted and fixed manually one by one, which is inconvenient to operate, low construction efficiency, and a high risk of falling from heights. Summary of the invention

[0005] In order to solve the problems existing in the existing U-shaped steel bolted structure mentioned in the above background technology, the present invention provides a temporary guardrail for the bottom plate of a ship lock chamber.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A temporary guardrail for a bottom plate of a ship lock chamber, comprising a first guardrail body and a second guardrail body, wherein the rear ends of the first guardrail body and the second guardrail body are provided with connecting rods, and the bottom ends of the connecting rods are both provided with fixing rods;

[0008] A fixing mechanism is arranged at the top end of the fixing rod, and the fixing mechanism includes a first connecting block, the first connecting block is arranged at the top end of the fixing rod, both ends of the surface of the first connecting block are provided with plug holes, a U-shaped steel is arranged inside the plug hole, and the surfaces of both ends of the U-shaped steel are provided with square holes, a fixing shell is fixedly installed on the top of the first connecting block, a sliding groove is arranged on one side of the interior of the fixing shell, the number of the sliding grooves is two, the interiors of the two sliding grooves are slidably connected with a first slider, one end of the two first sliders are fixedly installed with a first rack and a second rack, a middle part of the interior of the fixing shell is rotatably connected with a gear meshing with the first rack and the second rack, a mounting plate is fixedly installed on the side facing the first rack and the second rack, and a first plug block located inside the square hole is fixedly installed on the side facing the mounting plate.

[0009] Optionally, it also includes: a splicing mechanism, which is arranged on the left side of the bottom end of the first guardrail body, the splicing mechanism includes a connecting shell, the connecting shell is arranged on the left side of the bottom end of the first guardrail body, and a second plug-in block located inside the connecting shell is fixedly installed on the right side of the bottom end of the second guardrail body, a first square groove is opened at the bottom end of the second plug-in block, a limiting groove is opened on the left side inside the connecting shell, and a limiting rod is slidably connected inside the limiting groove, a movable plate is fixedly installed on the right side of the limiting rod, a sliding hole is opened on the surface of the movable plate, and a plug-in plate located inside the first square groove is fixedly installed on the top of the movable plate, a rotating rod is rotatably connected inside the connecting shell, a threaded block is threadedly connected on the surface of the rotating rod, a U-shaped plate is fixedly installed on the top of the threaded block, and a second slider located inside the sliding hole is fixedly installed on the right end of the U-shaped plate, and the second slider can slide inside the sliding hole.

[0010] Optionally, a second square groove is formed at the bottom end of the connecting shell, a second connecting block is slidably connected inside the second square groove, and a top end of the second connecting block is fixedly connected to a bottom end of the threaded block.

[0011] Optionally, a positioning groove is provided on one side of the top of the U-shaped steel, a mounting block is fixedly installed on the top of the first connecting block, a spring is elastically connected inside the mounting block, and a positioning block located inside the positioning groove is fixedly installed at one end of the spring.

[0012] Optionally, the positioning block is semicircular in design and has a smooth surface, and the surface of the positioning block fully fits the interior of the positioning groove.

[0013] Optionally, the sliding hole is of inclined design, the second sliding block is of cylindrical design, and the size of the second sliding block is adapted to the sliding hole.

[0014] Optionally, the number of the limiting grooves and the number of the limiting rods are both two, and the limiting grooves and the limiting rods are designed to be longitudinally symmetrical about the center of the connecting shell.

[0015] Optionally, the slide groove and the first sliding block are both T-shaped in design, and the surface of the first sliding block fully fits with the inner wall of the slide groove.

[0016] Optionally, the front end of the rotating rod passes through the first guardrail body, and a handle located outside the first guardrail body is fixedly mounted thereon.

[0017] Optionally, there is a gap between the rotating rod and the moving plate, and the rotating rod and the moving plate do not interfere with each other.

[0018] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects:

[0019] The present invention places the first guardrail body and the second guardrail body at the edge of the lock body, then inserts the U-shaped steel into the gap of the steel cage inside the lock body, and then inserts the two ends of the U-shaped steel into the inside of the insertion hole, then the surface of the U-shaped steel contacts the surface of the positioning block, then aligns the first insertion block with the square hole, then rotates the gear, then the gear drives the first rack and the second rack to move toward each other, then the first rack and the second rack push the mounting plate and the first insertion block to move toward each other, and then the first insertion block enters the inside of the square hole, thereby fixing the U-shaped steel, and then the U-shaped steel can fix the first guardrail body and the second guardrail body at the edge of the lock body, and finally inserts the U-shaped steel into the gap of the steel cage and the inside of the insertion hole, and then rotates the gear to make the first insertion block enter the inside of the square hole, so that the first guardrail body and the second guardrail body can be fixed at the edge of the lock body without driving the anchor structure, thereby avoiding concrete cracking, damage or performance degradation;

[0020] The present invention splices the first guardrail body and the second guardrail body together, and then inserts the second plug block at the right end of the second guardrail body into the interior of the connecting shell, and then the first square groove at the bottom end of the second plug block is aligned with the plug plate, and then the handle can be rotated, and then the handle drives the rotating rod to rotate, when the rotating rod rotates, the threaded block moves, and then the threaded block drives the U-shaped plate and the second slider to move, and the second slider moves inside the sliding hole, and then the moving plate moves upward, and the moving plate lifts the plug plate to enter the interior of the first square groove, thereby fixing the second plug block inside the connecting shell, and finally the plug plate enters the interior of the first square groove by rotating the rod, so that it is convenient for the operator to splice the first guardrail body and the second guardrail body together, thereby reducing the workload of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of a rear-view guardrail of the present invention;

[0023] Figure 3 This is a schematic diagram of a cross-section U-shaped steel according to the present invention;

[0024] Figure 4 A schematic diagram showing the jack of the present invention;

[0025] Figure 5 It is a schematic diagram of a cross-sectional fixed shell of the present invention;

[0026] Figure 6 It is a schematic diagram showing the slider of the present invention;

[0027] Figure 7 This is a schematic diagram of a cross-sectional connection shell of the present invention;

[0028] Figure 8 It is a schematic diagram of a cross-sectional movable plate of the present invention;

[0029] Fig. 9 This is a schematic diagram showing the second connecting block of the present invention.

[0030] In the figure: 1. the first guardrail body; 2. the second guardrail body; 3. the connecting rod; 4. the fixing rod; 5. the first connecting block; 6. the plug hole; 7. the U-shaped steel; 8. the square hole; 9. the fixing shell; 10. the slide groove; 11. the first slider; 12. the first rack; 13. the second rack; 14. the gear; 15. the mounting plate; 16. the first plug block; 17. the positioning groove; 18. the mounting block; 19. the spring; 20. the positioning block; 21. the second plug block; 22. the first square groove; 23. the rotating rod; 24. the threaded block; 25. the limiting groove; 26. the limiting rod; 27. the moving plate; 28. the sliding hole; 29. ​​the U-shaped plate; 30. the second slider; 31. the plug plate; 32. the second square groove; 33. the second connecting block; 34. the connecting shell. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 9 As shown, the present invention provides a foundation-free reinforced concrete structure edge protection guardrail, including a first guardrail body 1 and a second guardrail body 2, the rear ends of the first guardrail body 1 and the second guardrail body 2 are provided with connecting rods 3, and the bottom ends of the connecting rods 3 are provided with fixing rods 4.

[0033] A fixing mechanism is provided at the top of the fixing rod 4, and the fixing mechanism includes a first connecting block 5, which is arranged at the top of the fixing rod 4. Both ends of the surface of the first connecting block 5 are provided with plug holes 6, and U-shaped steel 7 is provided inside the plug hole 6. Square holes 8 are provided on the surfaces of both ends of the U-shaped steel 7. A fixing shell 9 is fixedly installed on the top of the first connecting block 5, and a slide groove 10 is provided on one side inside the fixing shell 9. There are two slide grooves 10, and the insides of the two slide grooves 10 are both slidably connected with first sliders 11, and one end of the two first sliders 11 is fixedly installed with a first rack 12 and a second rack 13, and the middle part of the inside of the fixing shell 9 is rotatably connected with a gear 14 meshing with the first rack 12 and the second rack 13, and a mounting plate 15 is fixedly installed on the side facing the first rack 12 and the second rack 13, and a first plug block 16 located inside the square hole 8 is fixedly installed on the side facing the mounting plate 15.

[0034] After the operator completes the splicing, the first guardrail body 1 and the second guardrail body 2 can be placed on the edge of the lock body, and then the U-shaped steel 7 can be inserted into the gap of the steel cage inside the lock body, and then the two ends of the U-shaped steel 7 are inserted into the inside of the insertion hole 6, and then the bottom end of the insertion hole 6 is in contact with the surface of the steel cage, and the square hole 8 on the surface of the U-shaped steel 7 is aligned with the first plug block 16. After alignment, the gear 14 can be rotated, because the gear 14 is meshed with the first rack 12 and the second rack 13, and then when the gear 14 rotates, it will drive the first rack 12 and the second rack 13 to move toward each other, and When the first rack 12 and the second rack 13 rotate, the first slider 11 will move inside the slide groove 10, so that the first rack 12 and the second rack 13 can move smoothly, and then the first rack 12 and the second rack 13 will push the mounting plate 15 and the first plug block 16 to move toward each other, and then the first plug block 16 will enter the inside of the square hole 8, so that the U-shaped steel 7 can be fixed inside the plug hole 6, and the U-shaped steel 7 can fix the first guardrail body 1 and the second guardrail body 2 at the edge of the lock body, so as to avoid the first guardrail body 1 and the second guardrail body 2 from being offset during the protection process.

[0035] When it is necessary to cancel the fixation of the first guardrail body 1 and the second guardrail body 2, the gear 14 can be rotated in the opposite direction, and then the gear 14 will drive the first rack 12 and the second rack 13 to move relative to each other, and then the first rack 12 and the second rack 13 will pull the mounting plate 15 and the first plug block 16 to move relative to each other, and then the first plug block 16 will be separated from the inside of the square hole 8, and then the limit on the U-shaped steel 7 can be canceled, and then the U-shaped steel 7 can be pulled out, so that the fixation of the first guardrail body 1 and the second guardrail body 2 can be canceled, and then the first guardrail body 1 and the second guardrail body 2 can be moved.

[0036] like Figure 7 , Figure 8 and Fig. 9 As shown, the splicing mechanism is arranged on the left side of the bottom end of the first guardrail body 1, and the splicing mechanism includes a connecting shell 34, which is arranged on the left side of the bottom end of the first guardrail body 1, and the second plug-in block 21 located inside the connecting shell 34 is fixedly installed on the right side of the bottom end of the second guardrail body 2, and the bottom end of the second plug-in block 21 is provided with a first square groove 22, and a limiting groove 25 is provided on the left side inside the connecting shell 34, and the limiting groove 25 is slidably connected to the limiting rod 26 inside, and a moving plate 27 is fixedly installed on the right side of the limiting rod 26, and a sliding hole 28 is provided on the surface of the moving plate 27, and the top of the moving plate 27 is fixedly installed with the plug-in plate 31 located inside the first square groove 22, and the inside of the connecting shell 34 is rotatably connected with the rotating rod 23, and the surface of the rotating rod 23 is threadedly connected with the thread block 24, and the top of the thread block 24 is fixedly installed with a U-shaped plate 29, and the right end of the U-shaped plate 29 is fixedly installed with a second slider 30 located inside the sliding hole 28, and the second slider 30 can slide inside the sliding hole 28.

[0037] Through the design of the splicing mechanism, during the splicing of the first guardrail body 1 and the second guardrail body 2, the second plug block 21 at the right end of the second guardrail body 2 will enter the interior of the connecting shell 34, and when the left end of the first guardrail body 1 contacts the right end of the second guardrail body 2, the first square groove 22 at the bottom end of the second plug block 21 will be aligned with the plug plate 31, and then the rotating rod 23 can be rotated. Since the rotating rod 23 is threadedly connected with the thread block 24, when the rotating rod 23 rotates, the thread block 24 will move forward on the surface of the rotating rod 23, and then the thread block 24 will drive the U-shaped plate 29 and the second slider 30 to move, and then the second slider 30 will slide inside the sliding hole 28, and during the sliding of the second slider 30, the moving plate 27 will move upward, and then the moving plate 27 will push the plug plate 31 to move upward, and the plug plate 31 will enter the interior of the first square groove 22, thereby fixing the second plug block 21 inside the connecting shell 34, and then the splicing can be completed.

[0038] like Fig. 9 As shown, a second square groove 32 is formed at the bottom end of the connecting shell 34 , a second connecting block 33 is slidably connected inside the second square groove 32 , and the top end of the second connecting block 33 is fixedly connected to the bottom end of the threaded block 24 .

[0039] Through the design of the second square groove 32 and the second connecting block 33, when the rotating rod 23 rotates, the second connecting block 33 limits the threaded block 24, thereby ensuring that the threaded block 24 can move normally, and when the threaded block 24 moves, the second connecting block 33 will move inside the second square groove 32, thereby enabling the threaded block 24 to move smoothly.

[0040] like Figure 3 and Figure 4 As shown, a positioning groove 17 is provided on one side of the top of the U-shaped steel 7, a mounting block 18 is fixedly installed on the top of the first connecting block 5, a spring 19 is elastically connected inside the mounting block 18, and a positioning block 20 located inside the positioning groove 17 is fixedly installed at one end of the spring 19.

[0041] Through the design of the mounting block 18, the spring 19 and the positioning block 20, after the U-shaped steel 7 is inserted into the inside of the insertion hole 6, the surface of the U-shaped steel 7 will contact the surface of the positioning block 20, and then the positioning block 20 will be squeezed and contracted to the inside of the mounting block 18, and then the spring 19 will be squeezed and contact the surface of the steel cage at the bottom end of the U-shaped steel 7, so that the positioning block 20 can be aligned with the positioning groove 17, and then the compressed spring 19 will push the positioning block 20 into the inside of the positioning groove 17, and then positioning can be performed. After the positioning is completed, the square hole 8 will be aligned with the surface of the first plug block 16, so as to facilitate the first plug block 16 to enter the inside of the square hole 8.

[0042] like Figure 3 and Figure 7 As shown, the positioning block 20 is semicircular in design and has a smooth surface. The surface of the positioning block 20 fully fits the interior of the positioning groove 17. The sliding hole 28 is inclined in design. The second slider 30 is cylindrical in design, and the size of the second slider 30 is adapted to the sliding hole 28.

[0043] Through the design of the positioning block 20, since the positioning block 20 is semicircular in design and has a smooth surface, it is convenient for the positioning block 20 to be disengaged from the interior of the positioning groove 17, so that the U-shaped steel 7 can move more smoothly. Through the design of the sliding hole 28 and the second slider 30, since the second slider 30 is cylindrical in design and has a smooth surface, it is convenient for the second slider 30 to slide inside the sliding hole 28, and the sliding hole 28 is inclined in design, so when the second slider 30 moves, the moving plate 27 will move up or down.

[0044] like Figure 6 and Fig. 9 As shown, the number of the limit grooves 25 and the limit rods 26 are both two, and the limit grooves 25 and the limit rods 26 are designed to be longitudinally symmetrical about the center of the connecting shell 34. The slide groove 10 and the first slider 11 are both T-shaped, and the surface of the first slider 11 fully fits with the inner wall of the slide groove 10.

[0045] Through the design of the limit groove 25 and the limit rod 26, since the limit groove 25 and the limit rod 26 are symmetrically designed, when the movable plate 27 moves, the limit rod 26 will move inside the limit groove 25, thereby limiting the moving direction of the movable plate 27 and allowing the movable plate 27 to move smoothly. Through the design of the slide groove 10 and the first slider 11, since the slide groove 10 and the first slider 11 are both T-shaped, when the first slider 11 moves, the first rack 12 and the second rack 13 can be supported to avoid positional displacement of the first rack 12 and the second rack 13.

[0046] like Figure 8 As shown, the front end of the rotating rod 23 passes through the first guardrail body 1, and a handle located outside the first guardrail body 1 is fixedly installed, there is a gap between the rotating rod 23 and the moving plate 27, and the rotating rod 23 and the moving plate 27 do not interfere with each other.

[0047] Through the design of the rotating rod 23, the operator can hold the handle and then easily rotate the rotating rod 23 to allow the insert plate 31 to enter the first square groove 22. Through the design of the rotating rod 23 and the movable plate 27, when the movable plate 27 is raised or lowered, there is a gap between the rotating rod 23 and the movable plate 27, and thus when the movable plate 27 moves, the rotating rod 23 will not interfere with the movable plate 27.

[0048] The workflow of the technical solution of the present invention is as follows:

[0049] First, the operator splices the first guardrail body 1 and the second guardrail body 2 together, and then inserts the second plug block 21 at the right end of the second guardrail body 2 into the interior of the connecting shell 34, and the first square groove 22 at the bottom end of the second plug block 21 will be aligned with the plug plate 31, and then the handle is turned, and the handle drives the rotating rod 23 to rotate. When the rotating rod 23 rotates, the threaded block 24 moves, and the threaded block 24 drives the U-shaped plate 29 and the second slider 30 to move, and the second slider 30 moves inside the sliding hole 28, and the moving plate 27 moves upward to lift the plug plate 31 into the interior of the first square groove 22, thereby fixing the second plug block 21 inside the connecting shell 34 to complete the splicing.

[0050] After the splicing is completed, the first guardrail body 1 and the second guardrail body 2 are placed on the edge of the lock body, and the U-shaped steel 7 is inserted into the gap of the steel cage inside the lock body, so that the two ends of the U-shaped steel 7 are inserted into the inside of the insertion hole 6, and the surface of the U-shaped steel 7 contacts the surface of the positioning block 20, and the positioning block 20 is squeezed to shrink into the inside of the mounting block 18, and then the positioning block 20 squeezes the spring 19. When the bottom end of the U-shaped steel 7 contacts the surface of the steel cage, the positioning block 20 is aligned with the positioning groove 17, and then the compressed spring 19 will push the positioning block 20 into the inside of the positioning groove 17, and when the positioning block 20 enters the positioning groove 17, the first plug block 16 will also be aligned with the square hole 8, and then the gear 14 is rotated, the gear 14 drives the first rack 12 and the second rack 13 to move toward each other, the first rack 12 and the second rack 13 push the mounting plate 15 and the first plug block 16 to move toward each other, and then the first plug block 16 enters the inside of the square hole 8, so as to fix the U-shaped steel 7, and then the U-shaped steel 7 fixes the first guardrail body 1 and the second guardrail body 2 at the edge of the lock body, the first guardrail body 1 and the second guardrail body 2 ensure the safety of the construction personnel, prevent people from falling or objects from falling, and finally complete the operation process.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temporary guardrail for the bottom plate of a ship lock chamber, comprising a first guardrail body and a second guardrail body, characterized in that: The rear ends of the first guardrail body and the second guardrail body are provided with connecting rods, and the bottom ends of the connecting rods are provided with fixing rods; A fixing mechanism is arranged at the top end of the fixing rod, and the fixing mechanism includes a first connecting block, the first connecting block is arranged at the top end of the fixing rod, both ends of the surface of the first connecting block are provided with plug holes, a U-shaped steel is arranged inside the plug hole, and the surfaces of both ends of the U-shaped steel are provided with square holes, a fixing shell is fixedly installed on the top of the first connecting block, a sliding groove is arranged on one side of the interior of the fixing shell, the number of the sliding grooves is two, the interiors of the two sliding grooves are slidably connected with a first slider, one end of the two first sliders are fixedly installed with a first rack and a second rack, a middle part of the interior of the fixing shell is rotatably connected with a gear meshing with the first rack and the second rack, a mounting plate is fixedly installed on the side facing the first rack and the second rack, and a first plug block located inside the square hole is fixedly installed on the side facing the mounting plate.

2. The foundation-free reinforced concrete structure edge protection guardrail according to claim 1 is characterized in that: The invention also includes a splicing mechanism, which is arranged on the left side of the bottom end of the first guardrail body, the splicing mechanism includes a connecting shell, the connecting shell is arranged on the left side of the bottom end of the first guardrail body, and a second plug-in block located inside the connecting shell is fixedly installed on the right side of the bottom end of the second guardrail body, a first square groove is opened at the bottom end of the second plug-in block, a limiting groove is opened on the left side inside the connecting shell, a limiting rod is slidably connected inside the limiting groove, a movable plate is fixedly installed on the right side of the limiting rod, a sliding hole is opened on the surface of the movable plate, a plug-in plate located inside the first square groove is fixedly installed on the top of the movable plate, a rotating rod is rotatably connected inside the connecting shell, a threaded block is threadedly connected on the surface of the rotating rod, a U-shaped plate is fixedly installed on the top of the threaded block, and a second slider located inside the sliding hole is fixedly installed on the right end of the U-shaped plate, and the second slider can slide inside the sliding hole.

3. The foundation-free reinforced concrete structure edge protection guardrail according to claim 2 is characterized in that: A second square groove is formed at the bottom end of the connecting shell, a second connecting block is slidably connected inside the second square groove, and a top end of the second connecting block is fixedly connected to the bottom end of the threaded block.

4. The foundation-free reinforced concrete structure edge protection guardrail according to claim 1 is characterized in that: A positioning groove is provided on one side of the top of the U-shaped steel, a mounting block is fixedly installed on the top of the first connecting block, a spring is elastically connected inside the mounting block, and a positioning block located inside the positioning groove is fixedly installed on one end of the spring.

5. The foundation-free reinforced concrete structure edge protection guardrail according to claim 4 is characterized in that: The positioning block is semicircular in design and has a smooth surface, and the surface of the positioning block is fully fitted with the interior of the positioning groove.

6. The foundation-free reinforced concrete structure edge protection guardrail according to claim 2 is characterized in that: The sliding hole is designed to be inclined, the second sliding block is designed to be cylindrical, and the size of the second sliding block is matched with the sliding hole.

7. The foundation-free reinforced concrete structure edge protection guardrail according to claim 2 is characterized in that: The number of the limiting grooves and the limiting rods are both two, and the limiting grooves and the limiting rods are designed to be longitudinally symmetrical about the center of the connecting shell.

8. The foundation-free reinforced concrete structure edge protection guardrail according to claim 1, characterized in that: The slide groove and the first sliding block are both T-shaped in design, and the surface of the first sliding block fully fits the inner wall of the slide groove.

9. The foundation-free reinforced concrete structure edge protection guardrail according to claim 2, characterized in that: The front end of the rotating rod passes through the first guardrail body and is fixedly mounted with a handle located outside the first guardrail body.

10. The foundation-free reinforced concrete structure edge protection guardrail according to claim 2, characterized in that: There is a gap between the rotating rod and the moving plate, and the rotating rod and the moving plate do not interfere with each other.

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