Splicing easy-to-maintain guardrail for highway

Abstract

The utility model relates to the technical field of road guardrails, and discloses a splicing easy-to-maintain guardrail for a road, which comprises a first stand column and a second stand column, and further comprises two cross beams welded between the first stand column and the second stand column, the number of the cross beams is two, the cross beams are arranged up and down, and the cross beams are communicated with the first stand column; through cooperation of the power mechanism and the rotating column, the threaded sleeve can drive the arc-shaped shell to stretch into the second stand column, the limiting mechanism abuts against the arc-shaped shell to achieve the limiting effect, and therefore the purpose of quickly splicing two sections of guardrails can be achieved; according to the road guardrail dismounting device, the limiting mechanism can relieve the limiting effect on the arc-shaped shell, and then the threaded sleeve can drive the arc-shaped shell to retract into the inner cavity of the connecting shell through cooperation of the power mechanism and the rotating column, so that the two sections of guardrails can be conveniently dismounted, and the road guardrail maintenance efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of highway guardrails, and particularly relates to a splicable and easy-to-maintain guardrail for highways. Background Technique

[0002] The guardrail for highways is an important part of highway safety protection facilities. Its main functions are to prevent vehicles from deviating from the route and crashing out of the road, protect pedestrians from being injured by vehicles, and guide the driving direction of vehicles. It is usually made of strong and durable materials and is an indispensable important part of highway construction.

[0003] During the long-term use of highway guardrails, problems such as damage and deformation may occur due to vehicle impacts, natural aging, etc. In order to ensure highway traffic safety, highway maintenance departments need to timely maintain and replace the guardrails. At present, most of the existing guardrails are spliced together by bolts or welding. Bolted or welded guardrails require a lot of manpower and time for disassembly and replacement maintenance, resulting in inconvenience and low efficiency when maintaining and replacing damaged guardrails. Content of the Utility Model

[0004] The purpose of the utility model is to provide a splicable and easy-to-maintain guardrail for highways to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A splicable and easy-to-maintain guardrail for highways, including a first column and a second column, further including:

[0006] Crossbeams welded between the first column and the second column. The number of the crossbeams is two and they are arranged up and down. The crossbeams are interconnected with the first column. A vertical rod is welded between the two crossbeams. The number of the vertical rods is several and they are evenly distributed;

[0007] Connection shells connected in a communicating manner on one side of the first column. The number of the connection shells is two and they correspond to the positions of the crossbeams. A threaded sleeve is arranged in the inner cavity of the connection shell. A first support plate is welded on one side of the inner wall of the connection shell. One end of the threaded sleeve penetrates to one side of the first support plate and is slidably connected to the penetration part thereof;

[0008] An arc-shaped shell is fixedly connected to the other end of the threaded sleeve. A rotating column is arranged between the two crossbeams. Power mechanisms for cooperating with the rotating column are arranged in the inner cavities of the two crossbeams. Two opening grooves are formed on one side of the second column and correspond to the positions of the connection shells;

[0009] A limiting mechanism arranged in the inner cavity of the second upright post. A connecting plate is fixedly connected to the surface of the threaded sleeve. One side of the connecting plate is bolted with an insertion plate. Two first through grooves are formed on one side of the first upright post. The insertion plate is slidably connected to the inner wall of the first through groove;

[0010] An auxiliary mechanism for releasing the restriction of the limiting mechanism on the arc-shaped shell.

[0011] Preferably, the power mechanism includes a second support plate fixedly connected to the inner wall of the cross beam and a lead screw arranged in the inner cavity of the cross beam. One end of the lead screw penetrates to one side of the second support plate and is rotatably connected to the penetration part. The threaded surface of the lead screw is threadedly connected to the inner wall of the threaded sleeve. One end of the lead screw is fixedly connected with a second bevel gear. One side of the second bevel gear is meshed with a first bevel gear. The first bevel gear is fixedly connected to the surface of the rotating column. The top end of the rotating column is fixedly connected with a hand wheel.

[0012] Preferably, the limiting mechanism includes a support plate fixedly connected to the inner wall of the second upright post and a guide plate fixedly connected to the inner wall of the second upright post. A sliding rod is arranged in the inner cavity of the second upright post. Both ends of the sliding rod penetrate to the outside of the support plate and the guide plate respectively and are slidably connected to the penetration parts. A connecting piece is bolted to the surface of the sliding rod. A tension spring is fixedly connected to the bottom of the connecting piece. The bottom end of the tension spring is fixedly connected to the surface of the support plate. A clamping block is fixedly connected to the bottom end of the support plate.

[0013] Preferably, the auxiliary mechanism includes an elliptical ring body slidably connected to the surface of the threaded sleeve and a sliding sleeve fixedly connected to one side of the elliptical ring body. The inner wall of the sliding sleeve is slidably connected to the surface of the threaded sleeve. One side of the surface of the sliding sleeve is fixedly connected with a shifting rod. A sliding groove is formed on the surface of the connecting shell. The shifting rod is slidably connected to the inner wall of the sliding groove. The material of the shifting rod is nickel-iron alloy. A first magnet is embedded on one side of the sliding groove.

[0014] Preferably, a second through groove is formed on one side of the second upright post. A plug-in shell is fixedly connected to the inner wall of the second upright post. The plug-in shell is communicated with the second through groove.

[0015] Preferably, a shielding piece is fixedly connected to one side of the shifting rod. The shielding piece is used in cooperation with the sliding groove. A limiting frame is fixedly connected to the inner wall of the connecting shell. The shielding piece is slidably connected to the inner wall of the limiting frame.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] Through the cooperation of the power mechanism and the rotating column, the utility model can drive the threaded sleeve to drive the arc-shaped shell into the interior of the second column, and enable the limiting mechanism to abut against the arc-shaped shell to achieve the limiting effect, so as to realize the purpose of quickly splicing between two sections of guardrails. At the same time, through the setting of the auxiliary mechanism, the limiting effect of the limiting mechanism on the arc-shaped shell can be released. Then, through the cooperation of the power mechanism and the rotating column, the threaded sleeve can drive the arc-shaped shell to retract into the inner cavity of the connecting shell. Accordingly, the two sections of guardrails can be disassembled conveniently. Compared with the traditional methods of welding or bolt connection of guardrails, it not only reduces the labor intensity of personnel but also saves operation time, thus improving the efficiency of maintaining highway guardrails. Brief Description of the Drawings

[0018] Figure 1 is the structural schematic diagram of the utility model;

[0019] Figure 2 is the sectional structural schematic diagram of the first column, the second column and the cross beam of the utility model;

[0020] Figure 3 For the utility model Figure 2 is the enlarged structural schematic diagram at A in the utility model;

[0021] Figure 4 For the utility model Figure 2 is the enlarged structural schematic diagram at B in the utility model;

[0022] Figure 5 is the partial structural schematic diagram of the utility model;

[0023] Figure 6 is the sectional unfolded structural schematic diagram of the threaded sleeve in the utility model;

[0024] Figure 7 is the sectional structural schematic diagram of the cross beam and the first column of the utility model.

[0025] In the figure: 1. First column; 2. Second column; 3. Threaded sleeve; 4. Arc-shaped shell; 5. First support plate; 6. Auxiliary mechanism; 61. Oval ring body; 62. Sliding sleeve; 63. Poking rod; 64. Chute; 65. First magnet; 66. Second magnet; 7. Power mechanism; 71. First bevel gear; 72. Second bevel gear; 73. Lead screw; 74. Second support plate; 75. Handwheel; 8. Connecting plate; 9. Limiting mechanism; 91. Support plate; 92. Guide plate; 93. Slide bar; 94. Tension spring; 95. Connecting piece; 96. Block; 10. Open slot; 11. Shielding piece; 12. Limiting frame; 13. Cross beam; 14. Vertical rod; 15. Connecting shell; 16. Insertion plate; 17. First through slot; 18. Second through slot; 19. Insertion shell; 20. Rotating column. Detailed Description of the Preferred Embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figure 1-7As shown in the figure, a splicable and easily maintainable guardrail for roads includes a first upright post 1 and a second upright post 2. The bottoms of the first upright post 1 and the second upright post 2 are both bolted to the road surface through support bases. A cross beam 13 is welded between the first upright post 1 and the second upright post 2. The number of cross beams 13 is two and they are arranged vertically. The cross beam 13 is interconnected with the first upright post 1. A vertical rod 14 is welded between the two cross beams 13. The number of vertical rods 14 is several and they are evenly distributed. The first upright post 1, the second upright post 2, the cross beam 13 and the vertical rod 14 can form an independent guardrail structure. A connection shell 15 is connected and arranged on one side of the first upright post 1. One side of the connection shell 15 is of an open design. The number of connection shells 15 is two, and the two connection shells 15 correspond to the position of the cross beam 13. A threaded sleeve 3 is arranged in the inner cavity of the connection shell 15. A first support plate 5 is welded on one side of the inner wall of the connection shell 15. One end of the threaded sleeve 3 penetrates to the other side of the first support plate 5 and is slidably connected to the penetration part. The other end of the threaded sleeve 3 is fixedly connected with an arc-shaped shell 4. The arc-shaped shell 4 is designed as a semi-circular shell. A rotating column 20 is arranged between the two cross beams 13 and close to one side of the first upright post 1. The bottom end of the rotating column 20 penetrates into the inner cavity of the lower cross beam 13 and is rotatably connected to its inner wall. The top end of the rotating column 20 penetrates above the upper cross beam 13 and is rotatably connected to the penetration part. Power mechanisms 7 are arranged in the inner cavities of the two cross beams 13. The power mechanisms 7 cooperate with the rotating column 20 and can make the threaded sleeve 3 drive the arc-shaped shell 4 to perform horizontal telescopic movement in the inner cavity of the connection shell 15. Two opening grooves 10 are opened on one side of the second upright post 2. The number of opening grooves 10 is two and they correspond to the position of the connection shell 15. A limiting mechanism 9 is arranged in the inner cavity of the second upright post 2. The number and position of the limiting mechanism 9 correspond to those of the opening grooves 10. When it is necessary to splice two sections of guardrails, align the connection shell 15 with the opening groove 10 of another section of spliced guardrail. Then, through the power mechanism 7, make the threaded sleeve 3 drive the arc-shaped shell 4 to move out of the connection shell 15 to the outside, so that part of the threaded sleeve 3 and the arc-shaped shell 4 can extend into the inner cavity of the second upright post 2 through the opening groove 10. At this time, the limiting mechanism 9 can provide a limiting effect on the arc-shaped shell 4 and prevent the arc-shaped shell 4 from slipping out of the inner cavity of the second upright post 2, so as to quickly achieve the effect of splicing two sections of guardrails;A connecting plate 8 is fixedly connected to the surface of the threaded sleeve 3 located in the first upright post 1. One side of the connecting plate 8 is bolted with a plug plate 16. Two first through grooves 17 are formed on one side of the first upright post 1. One end of the plug plate 16 extends to the outside of the first upright post 1 through the first through groove 17, and the plug plate 16 is slidably connected to the inner wall of the first through groove 17. A second through groove 18 is formed on one side of the second upright post 2, and a plugging shell 19 is fixedly connected to the inner wall of the second upright post 2. The plugging shell 19 communicates with the second through groove 18. The second through groove 18 and the plugging shell 19 correspond to the height and quantity of the first through groove 17. The plug plate 16 and the plugging shell 19 are used in cooperation. When the threaded sleeve 3 drives the arc-shaped shell 4 to move into the inner cavity of the second upright post 2, the threaded sleeve 3 can drive the plug plate 16 to move synchronously through the connecting plate 8, so that the plug plate 16 can move into the inner cavity of the plugging shell 19 through the second through groove 18. Through the contact between the plug plate 16 and the inner wall of the plugging shell 19, it can prevent the inclination between the two spliced guardrails, thereby further improving the reliability and stability of the splicing between the two guardrails; an auxiliary mechanism 6 is arranged on the surface of the threaded sleeve 3. When it is necessary to release the splicing state of the two guardrails, the auxiliary mechanism 6 can release the limit on the arc-shaped shell 4 by the limiting mechanism 9. At this time, the power mechanism 7 can drive the threaded sleeve 3 and the arc-shaped shell 4 to retract into the inner cavity of the connecting shell 15, so as to quickly and conveniently release the splicing of the two guardrails.

[0028] The power mechanism 7 includes a second support plate 74 fixedly connected to the inner wall of the cross beam 13. A lead screw 73 is arranged in the inner cavity of the cross beam 13. One end of the lead screw 73 penetrates to the other side of the second support plate 74 and is fixedly connected to the penetration part through a bearing. The threaded surface on one side of the lead screw 73 is threadedly connected to the inner wall of the threaded sleeve 3. One end of the lead screw 73 is fixedly connected to a second bevel gear 72. A first bevel gear 71 is meshed and connected to one side of the second bevel gear 72. The first bevel gear 71 is fixedly connected to the surface of a rotating column 20. A hand wheel 75 is fixedly connected to the top of the rotating column 20. By rotating the hand wheel 75, the rotating column 20 can drive the first bevel gear 71 to rotate synchronously. The rotating first bevel gear 71 can mesh with the second bevel gear 72 to rotate, so that the second bevel gear 72 can drive the lead screw 73 to rotate. The second support plate 74 can provide a stable supporting effect on the lead screw 73, so that the meshing state between the second bevel gear 72 and the first bevel gear 71 remains stable. Through the sliding connection between the plug plate 16 and the first through groove 17, the threaded sleeve 3 will not rotate along with the lead screw 73, but the threaded sleeve 3 moves on the rotating surface of the lead screw 73. Accordingly, the telescopic movement effect can be achieved for the threaded sleeve 3 and the arc-shaped shell 4.

[0029] The limiting mechanism 9 includes a support plate 91, the support plate 91 is fixedly connected to the inner wall of the second upright column 2, a guide plate 92 is fixedly connected to the inner wall of the second upright column 2, a sliding rod 93 is arranged between the support plate 91 and the guide plate 92 in the inner cavity of the second upright column 2, both ends of the sliding rod 93 respectively penetrate to the outside of the support plate 91 and the guide plate 92 and are slidably connected to their penetration positions, a connecting piece 95 is bolted to the surface of the sliding rod 93, a tension spring 94 is fixedly connected to the bottom of the connecting piece 95, the bottom end of the tension spring 94 is fixedly connected to the surface of the support plate 91, a clamping block 96 is fixedly connected to the bottom end of the support plate 91, the clamping block 96 is designed with a quasi-wedge-shaped structure. When the threaded sleeve 3 drives the arc-shaped shell 4 to extend into the inner cavity of the second upright column 2 through the opening groove 10, the arc surface on the outside of the arc-shaped shell 4 will first contact and press against the inclined surface on one side of the clamping block 96, which can cause the clamping block 96 to drive the sliding rod 93 and the connecting piece 95 to move upward. At this time, the upward-moving connecting piece 95 will stretch the length of the tension spring 94. Continuing to move the arc-shaped shell 4 can make the inclined surface on one side of the clamping block 96 slide over the arc surface on the outside of the arc-shaped shell 4 until the straight surface on the other side of the clamping block 96 abuts against the inner side of the arc-shaped shell 4. The edge of the inner groove of the arc-shaped shell 4 has a flat straight surface. The mutual abutment of the straight surface of the clamping block 96 and the straight surface of the arc-shaped shell 4 will form a support surface, which can enable the clamping block 96 to provide a limiting effect on the arc-shaped shell 4. Accordingly, the situation that the arc-shaped shell 4 slips out of the inner cavity of the second upright column 2 can be prevented, so as to provide a reliable limiting effect for the splicing of the two sections of guardrails. Under the elastic force of the tension spring 94, not only can the sliding rod 93 and the clamping block 96 quickly descend to keep in contact with the arc-shaped shell 4, but also the abutting state of the clamping block 96 against the arc-shaped shell 4 can be kept stable. The sliding connection of both ends of the sliding rod 93 with the inner walls of the support plate 91 and the guide plate 92 can enable the sliding rod 93 to maintain a vertical lifting state.

[0030] The auxiliary mechanism 6 includes an elliptical ring body 61, which is slidably connected to the surface of the threaded sleeve 3. The shape of the surface of the elliptical ring body 61 matches the shape of the groove on the inner side of the arc shell 4. When the elliptical ring body 61 slides from the surface of the threaded sleeve 3 to the groove on the inner side of the arc shell 4, one side of the elliptical ring body 61 will be embedded in the groove of the arc shell 4 to form a whole, so that both sides of the arc shell 4 can have arc surfaces. One side of the elliptical ring body 61 is fixedly connected to a sliding sleeve 62, and the inner wall of the sliding sleeve 62 is slidably connected to the surface of the threaded sleeve 3. One side of the surface of the sliding sleeve 62 is fixedly connected to a lever 63. A sliding groove 64 is provided on the surface of the connecting shell 15. One end of the lever 63 extends to the outside of the connecting shell 15 through the sliding groove 64, and the lever 63 slides with the inner wall of the sliding groove 64 When the two sections of the guardrail are in contact and spliced ​​state, by moving the lever 63 to slide in the slide groove 64, the sliding sleeve 62 can drive the elliptical ring body 61 to slide on the surface of the threaded sleeve 3 into the groove of the arc shell 4. The arc surface of the elliptical ring body 61 will first contact the inclined surface of one side of the block 96, so that the block 96 is squeezed and drives the slide rod 93 and the connecting piece 95 to move upward. At this time, the upward connecting piece 95 will stretch the tension spring 94, so that the block 96 will not hinder the sliding of the elliptical ring body 61. When one side of the elliptical ring body 61 is completely embedded in the groove of the arc shell 4 to form a whole, under the elastic action of the tension spring 94, the slide rod 93 and the block 96 can be pulled downward. At this time, the straight surface of one side of the block 96 will contact the arc surface of the other side of the elliptical ring body 61. The threaded sleeve 3 and the arc-shaped shell 4 are driven to retract into the connecting shell 15 by the power mechanism 7, so that the arc-shaped shell 4 can drive the elliptical ring body 61 to retract synchronously in the direction of the connecting shell 15. At this time, the straight surface of the block 96 will contact the arc surface of the elliptical ring body 61 and cannot form a clear supporting surface to hinder the movement of the elliptical ring body 61. Continuing to retract the arc-shaped shell 4 and the elliptical ring body 61 into the connecting shell 15 can cause the block 96 to be squeezed and drive the slide bar 93 to move upward, so that the block 96 cannot cause a limit block to the retraction movement of the elliptical ring body 61 and the arc-shaped shell 4. Accordingly, the two sections of the guardrail can be quickly and conveniently released from the splicing state. The material of the lever 63 is nickel-iron alloy. The surface of the connecting shell 15 and one side of the slide groove 64 are embedded with a first magnet 65. The connecting shell 1 5 and is embedded with a second magnet 66 on the other side of the slide groove 64. The second magnet 66 and the first magnet 65 are used in conjunction with the lever 63. When the lever 63 slides in the slide groove 64 and is attracted by the first magnet 65 through magnetic force, the position of the sliding sleeve 62 and the elliptical ring body 61 can be kept stable without moving with the threaded sleeve 3. When the lever 63 moves in the slide groove 64 and is attracted by the second magnet 66 through magnetic force, the stability of the elliptical ring body 61 and the inner groove of the arc shell 4 when they are embedded and fitted can be improved. A shielding sheet 11 is fixedly connected to one side of the lever 63. The shielding sheet 11 corresponds to the position of the slide groove 64. The shielding sheet 11 can shield the slide groove 64, which can reduce the damage caused by rainwater, dust and other debris entering the interior of the device.The inner wall of the connecting shell 15 is fixedly connected to the limiting frame 12, and the shielding piece 11 is slidably connected to the inner wall of the limiting frame 12. The limiting frame 12 can keep the shielding piece 11 and the inner wall of the connecting shell 15 in a stable fitting state, which can further enhance the shielding and protection effect of the slide groove 64.

[0031] Working principle: When two sections of guardrail are to be spliced, first align the connecting shell 15 of one section of guardrail with the opening groove 10 of the other section of guardrail, then turn the hand wheel 75 to make the rotating column 20 drive the first bevel gear 71 to rotate and mesh with the second bevel gear 72, so that the second bevel gear 72 drives the screw rod 73 to rotate, and the threaded sleeve 3 drives the arc shell 4 to extend from the opening groove 10 into the inner cavity of the second column 2. At this time, the inclined surface of the block 96 will contact and be squeezed with the arc surface of the arc shell 4, so that the block 96 can drive the slide rod 9 3 and the connecting piece 95 move up, and the upwardly moved connecting piece 95 can stretch the tension spring 94, and continue to move the arc shell 4 until the straight surface of the clamping block 96 abuts against the straight surface of the arc shell 4, which can provide a limiting effect on the arc shell 4. Under the elastic force of the tension spring 94, the sliding rod 93 and the clamping block 96 can be quickly lowered, so that the clamping block 96 and the arc shell 4 maintain a stable abutment state, thereby quickly providing a limiting effect for the splicing of the two sections of the guardrail, and at the same time, the moving threaded sleeve 3 drives the plug plate through the connecting plate 8 16 moves from the second through groove 18 to the inner cavity of the plug-in shell 19, which can further improve the reliability of the splicing between the two sections of the guardrail. When the two sections of the guardrail are to be disassembled, the lever 63 is first moved to make the sliding sleeve 62 drive the elliptical ring body 61 to slide on the surface of the threaded sleeve 3 toward the arc shell 4, and then the arc surface of the elliptical ring body 61 will first contact and squeeze with the inclined surface of the block 96, which can drive the slide bar 93 and the connecting piece 95 to move upward, so that the block 96 will not hinder the movement of the elliptical ring body 61, and continue to move the elliptical ring body 61. The body 61 has one side embedded in the groove of the arc shell 4 to form an integral body. At this time, the straight surface of the block 96 will contact the arc surface of the elliptical ring body 61. Then, the hand wheel 75 is rotated in the opposite direction to make the power mechanism 7 drive the threaded sleeve 3, the arc shell 4 and the elliptical ring body 61 to move into the connecting shell 15, so that the straight surface of the block 96 contacts the arc surface of the elliptical ring body 61. At this time, the block 96 cannot cause a limit block to the retraction movement of the elliptical ring body 61 and the arc shell 4, so that the two sections of the guardrail can be easily disassembled.

[0032] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0033] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A splicable and easy-to-maintain guardrail for a highway, comprising a first column (1) and a second column (2), characterized in that: Also includes: A crossbeam (13) welded between the first column (1) and the second column (2), wherein the number of the crossbeams (13) is two and they are arranged up and down, the crossbeam (13) and the first column (1) are connected to each other, and a vertical rod (14) is welded between the two crossbeams (13), and the number of the vertical rods (14) is several and they are evenly distributed; A connecting shell (15) is connected and arranged on one side of the first column (1), the number of the connecting shells (15) is two and corresponds to the position of the crossbeam (13), the inner cavity of the connecting shell (15) is provided with a threaded sleeve (3), one side of the inner wall of the connecting shell (15) is welded with a first support plate (5), one end of the threaded sleeve (3) penetrates to one side of the first support plate (5) and is slidably connected to the penetration point thereof; An arc-shaped shell (4) is fixedly connected to the other end of the threaded sleeve (3), a rotating column (20) is arranged between the two cross beams (13), and the inner cavities of the two cross beams (13) are both provided with a power mechanism (7) used in conjunction with the rotating column (20), and an open groove (10) is opened on one side of the second column (2), and the number of the open grooves (10) is two and corresponds to the position of the connecting shell (15); A limiting mechanism (9) is arranged in the inner cavity of the second column (2); a connecting plate (8) is fixedly connected to the surface of the threaded sleeve (3); a plug plate (16) is bolted to one side of the connecting plate (8); a first through groove (17) is opened on one side of the first column (1); the number of the first through grooves (17) is two; the plug plate (16) is slidably connected to the inner wall of the first through groove (17); An auxiliary mechanism (6) is used for releasing the restriction of the limiting mechanism (9) on the arc-shaped shell (4).

2. The splicable and easy-to-maintain guardrail for highway according to claim 1, characterized in that: The power mechanism (7) comprises a second support plate (74) fixedly connected to the inner wall of the cross beam (13) and a screw rod (73) arranged in the inner cavity of the cross beam (13); one end of the screw rod (73) penetrates to one side of the second support plate (74) and is rotatably connected to the penetration point; the threaded surface of the screw rod (73) is threadedly connected to the inner wall of the threaded sleeve (3); one end of the screw rod (73) is fixedly connected to a second bevel tooth (72); one side of the second bevel tooth (72) is meshingly connected to a first bevel tooth (71); the first bevel tooth (71) is fixedly connected to the surface of a rotating column (20); and the top end of the rotating column (20) is fixedly connected to a hand wheel (75).

3. The splicable and easy-to-maintain guardrail for highway according to claim 1 is characterized by: The limiting mechanism (9) comprises a support plate (91) fixedly connected to the inner wall of the second column (2) and a guide plate (92) fixedly connected to the inner wall of the second column (2); a sliding rod (93) is provided in the inner cavity of the second column (2); the two ends of the sliding rod (93) respectively penetrate to the outer sides of the support plate (91) and the guide plate (92) and are slidably connected to their penetration points; a connecting piece (95) is bolted to the surface of the sliding rod (93); the bottom of the connecting piece (95) is fixedly connected to a tension spring (94); the bottom end of the tension spring (94) is fixedly connected to the surface of the support plate (91); and the bottom end of the support plate (91) is fixedly connected to a clamping block (96).

4. The splicable and easy-to-maintain guardrail for highway according to claim 1 is characterized by: The auxiliary mechanism (6) comprises an elliptical ring body (61) slidably connected to the surface of the threaded sleeve (3) and a sliding sleeve (62) fixedly connected to one side of the elliptical ring body (61); the inner wall of the sliding sleeve (62) is slidably connected to the surface of the threaded sleeve (3); a lever (63) is fixedly connected to one side of the surface of the sliding sleeve (62); a sliding groove (64) is provided on the surface of the connecting shell (15); the lever (63) is slidably connected to the inner wall of the sliding groove (64); the material of the lever (63) is nickel-iron alloy; a first magnet (65) is embedded on one side of the sliding groove (64); and a second magnet (66) is embedded on the other side of the sliding groove (64).

5. The splicable and easy-to-maintain guardrail for highway according to claim 1 is characterized by: A second through slot (18) is provided on one side of the second column (2); a plug-in shell (19) is fixedly connected to the inner wall of the second column (2); and the plug-in shell (19) and the second through slot (18) are in communication with each other.

6. The splicable and easy-to-maintain guardrail for highway according to claim 4, characterized in that: A shielding sheet (11) is fixedly connected to one side of the lever (63), the shielding sheet (11) cooperates with the slide groove (64), the inner wall of the connecting shell (15) is fixedly connected to the limit frame (12), and the shielding sheet (11) is slidably connected to the inner wall of the limit frame (12).

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