Adjustable guardrail for municipal road construction

Abstract

The utility model relates to the technical field of highway construction, and discloses an adjustable guardrail for municipal highway construction, which comprises a first fixing column, a second fixing column and a base, a second connecting block is fixedly installed on the face, away from the first fixing column, of the second fixing column, and a connecting assembly is arranged on the inner surface of the first connecting block. According to the adjustable guardrail for municipal road construction, through the design of the connecting assemblies, rapid connection between the adjacent fixing columns can be achieved, after connection is completed, the adjacent fixing columns can rotate, the adjustable guardrail is suitable for roads with different road conditions, the adaptability is high, through the design of the telescopic mechanisms, in the transportation process, the telescopic mechanisms can be shrunk, and after shrinking is completed, the telescopic mechanisms can be conveniently moved. And the rotating rod is rotated to enable the fixing rod II to be clamped into the clamping groove, so that the overall rapid folding can be realized, the space during transportation is reduced, the working pressure during transportation is reduced, and the transportation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of municipal highway construction technology, specifically to an adjustable guardrail for municipal highway construction. Background Technology

[0002] A crucial piece of equipment used at road construction sites is called a highway construction guardrail. It is primarily used to isolate construction areas, protect construction materials and equipment, and ensure the safety of construction workers. Construction guardrails are typically made of iron pipes, processed through welding, grinding, rust-proofing spraying, and reflective film application. With advancements in construction technology and continuous development in materials science, the design and manufacturing of construction guardrails are constantly being optimized. In the future, construction guardrails may place greater emphasis on environmental protection and recyclability, while intelligent technologies may be introduced to improve their automation level and maintenance efficiency.

[0003] Chinese Utility Model Patent Publication No. CN 221442294 U discloses an adjustable guardrail for municipal construction. This adjustable guardrail, equipped with a connecting mechanism, allows for quick installation between adjacent guardrails during installation, thus improving its protective properties. It also allows for quick disassembly, increasing efficiency. However, while this adjustable guardrail allows for quick connection between adjacent guardrails, it can only be connected in a straight line, making it unsuitable for complex road conditions and exhibiting low adaptability. Furthermore, the lack of a retractable structure makes it difficult to fold up the entire structure, resulting in low transportation efficiency and poor practicality, hindering its widespread adoption. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an adjustable guardrail for municipal highway construction. It can effectively solve the problems of existing technology, which can quickly connect adjacent guardrails, but can only connect in a straight line, is not suitable for complex road conditions, has low adaptability, and does not have a retractable structure, making it inconvenient to fold up the whole, resulting in low transportation efficiency, poor practicality, and difficulty in promotion and use.

[0005] The technical solution adopted by this utility model is: an adjustable guardrail for municipal highway construction, including a first fixed post, a second fixed post and a base. A connecting block 1 is fixedly installed on the side of the first fixed post away from the second fixed post, and a connecting block 2 is fixedly installed on the side of the second fixed post away from the first fixed post. A connecting component is provided on the inner surface of the connecting block 1. A groove 1 is provided on the side of the connecting block 2 away from the second fixed post. A groove 2, a sliding groove and a limiting groove 1 are provided on the side of the first fixed post close to the second fixed post. A telescopic mechanism is provided between the first fixed post and the second fixed post. A sliding rod 1 is rotatably installed on the outer surface of the telescopic mechanism. A limiting groove 2 is provided on the side of the sliding rod 1 away from the first fixed post, and a limiting rod is inserted into the side of the sliding rod 1 away from the first fixed post.

[0006] Preferably, the connecting assembly includes a second sliding rod, a movable plate, a first limiting block, a first spring, a third sliding rod, a movable sleeve, a second spring, a second limiting block, a pull rod, and a third limiting groove. The movable plate is slidably connected to the outer surface of the second sliding rod. The first limiting block is fixedly installed on the outer surface of the movable plate. The first spring is fixedly installed on the side of the movable plate away from the first limiting block. The third sliding rod is fixedly installed on the inner surface of the first connecting block. The movable sleeve is slidably connected to the outer surface of the third sliding rod. The second spring is fixedly installed on the outer surface of the movable sleeve. The second limiting block is fixedly installed on the inner surface of the movable sleeve. The pull rod is fixedly installed on the outer surface of the movable sleeve. A third limiting groove is formed at the end of the second connecting block away from the second fixed post. The end of the movable plate is inclined. The first limiting block and the second limiting block are located on the same side of the movable plate. The first limiting block and the third limiting groove are compatible. The first fixed post and the second fixed post have the same structure. The first connecting block and the second connecting block are plugged in.

[0007] Using the above technical solution, the worker pulls the lever, which moves the movable sleeve toward the first fixed post. Spring 2 contracts, and during this movement, limiting block 2 presses against the movable plate. Spring 1 contracts, causing the movable plate to move inward, thus moving limiting block 1 inward until it is inserted into the interior of connecting block 1. Then, connecting block 1 is inserted into the interior of groove 1, ensuring that the center lines of limiting block 1 and limiting groove 3 are on the same vertical line. The lever is then released, spring 2 rebounds, pressing against the movable plate, and limiting block 2 returns to its original position. Simultaneously, spring 1 rebounds, pushing limiting block 1 into the interior of limiting groove 3. This allows for quick installation of connecting block 1 and connecting block 2, enabling rapid connection between adjacent fixed posts. After connection, adjacent fixed posts can rotate, making it suitable for highways with different road conditions and exhibiting high adaptability.

[0008] Preferably, the telescopic mechanism includes a rotating shaft, a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod. The rotating shaft is rotatably mounted on the inner surface of the second groove. The first connecting rod and the second connecting rod are fixedly mounted on the outer surface of the rotating shaft. The third connecting rod is rotatably mounted on the outer surface of the second connecting rod, and the fourth connecting rod is rotatably mounted on the outer surface of the third connecting rod. The first connecting rod and the fourth connecting rod are rotatably mounted. Multiple identical third connecting rods and fourth connecting rods are provided, and the multiple third connecting rods and fourth connecting rods are distributed at equal intervals.

[0009] With the above technical solution and the design of the telescopic mechanism, when it is necessary to adjust the distance between the first fixed column and the second fixed column, it is only necessary to pull the first fixed column or the second fixed column to move in the opposite direction. The structure is simple and highly practical.

[0010] Preferably, the sliding rod one is slidably connected to the sliding groove, the limiting rod extends through the limiting groove two and the limiting groove one to the interior of the first fixed column, and multiple identical limiting grooves one are opened, and the multiple limiting grooves one are distributed at equal intervals.

[0011] With the above technical solution, when adjusting the distance between the first fixed column and the second fixed column, the slide rod 1 slides inside the slide groove, which plays a guiding role and has high stability. When the distance between the first fixed column and the second fixed column is adjusted, the limiting rod extends through the limiting groove 2 and the limiting groove 1 into the interior of the first fixed column, which can realize the rapid limiting of the telescopic mechanism. During use, it is not easy for it to move and has high stability.

[0012] Preferably, a first fixing rod is fixedly installed at the end of the second fixing post away from the base, and a rotating rod is rotatably installed on the outer surface of the first fixing rod. A slot is provided at the end of the rotating rod away from the first fixing rod. A second fixing rod is fixedly installed at the end of the first fixing post away from the base, and the second fixing rod is adapted to the slot.

[0013] With the above technical solution, the telescopic mechanism can be retracted during transportation. After retraction, the operator rotates the rotating rod to make the fixed rod two engage with the slot, which can achieve rapid overall retraction, reduce the space required for transportation, alleviate the workload during transportation, and improve transportation efficiency.

[0014] Preferably, a guide rod is fixedly installed on the side of the base near the first fixed column, a counterweight plate is provided on the side of the base near the first fixed column, a guide groove is provided on the side of the counterweight plate away from the base, the counterweight plate and the guide rod are plugged in, and the cross-section of the counterweight plate is U-shaped.

[0015] Through the above technical solution, by cooperating with the guide rod and the guide groove, the operator inserts the guide rod into the guide groove during use, so that the counterweight plate contacts the base, which can realize the quick installation of the counterweight plate. Through the design of the counterweight plate, the overall center of gravity is lowered, making it less likely to tip over during use, thereby improving the overall stability. During transportation, the counterweight plate can be removed to reduce the working pressure during transportation and improve work efficiency.

[0016] Preferably, a reinforcing rod is fixedly installed on the side of the base near the first fixed post, and the other end of the reinforcing rod is fixedly installed to the first fixed post. The reinforcing rod is inclined at an angle of 45°, and the cross-section of the combination of the first fixed post, the base, and the reinforcing rod is a triangular structure.

[0017] Through the above technical solution, since triangles have stability, the design of the reinforcing rod further connects the base and the first fixed column, so that the cross-section of the combination of the first fixed column, the base and the reinforcing rod is a "triangular" structure, thereby improving the overall stability and firmness.

[0018] Compared with the prior art, this utility model provides an adjustable guardrail for municipal highway construction, which has the following beneficial effects:

[0019] 1. This adjustable guardrail for municipal highway construction utilizes the stability of a triangle. Through the design of reinforcing bars, the base and the first fixed post are further connected, resulting in a triangular cross-section of the first fixed post, base, and reinforcing bars. This enhances overall stability and robustness. The counterweight design lowers the center of gravity, preventing tipping during use and further improving stability. The counterweight can be removed during transportation, reducing workload and improving efficiency.

[0020] 2. This adjustable guardrail for municipal highway construction, through the design of the connecting components, can achieve quick connection between adjacent fixed posts. After connection, the adjacent fixed posts can rotate, making it suitable for highways with different road conditions and highly adaptable. Through the design of the telescopic mechanism, the telescopic mechanism can be retracted during transportation. After retraction, rotating the rotating rod will cause the two fixed rods to be inserted into the inside of the slot, which can achieve quick overall folding, reduce the space required for transportation, reduce the workload during transportation, and improve transportation efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ;

[0024] Figure 4 This is a schematic diagram of the counterweight installation structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the installation structure of the connecting component of this utility model;

[0026] Figure 6 This is a schematic diagram of the rotating rod installation structure of this utility model;

[0027] Figure 7 This is a schematic diagram of the installation structure of the telescopic mechanism of this utility model;

[0028] Figure 8 This utility model Figure 7 Enlarged structural diagram at point A in the middle.

[0029] The components are as follows: 1. First fixed post; 2. Second fixed post; 3. Connecting block one; 4. Connecting block two; 5. Connecting assembly; 501. Slide rod two; 502. Moving plate; 503. Limiting block one; 504. Spring one; 505. Slide rod three; 506. Moving sleeve; 507. Spring two; 508. Limiting block two; 509. Pull rod; 510. Limiting groove three; 6. Groove one; 7. Groove two; 8. Slide groove; 9. Limiting... 10. Telescopic mechanism; 1001. Rotating shaft; 1002. Connecting rod one; 1003. Connecting rod two; 1004. Connecting rod three; 1005. Connecting rod four; 11. Slide rod one; 12. Limiting groove two; 13. Limiting rod; 14. Base; 15. Reinforcing rod; 16. Guide rod; 17. Counterweight plate; 18. Guide groove; 19. Fixing rod one; 20. Rotating rod; 21. Slot; 22. Fixing rod two. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1: As Figure 1-8As shown, the present invention provides an adjustable guardrail for municipal highway construction, comprising a first fixed post 1, a second fixed post 2, and a base 14. A connecting block 3 is fixedly installed on the side of the first fixed post 1 away from the second fixed post 2, and a connecting block 4 is fixedly installed on the side of the second fixed post 2 away from the first fixed post 1. A connecting component 5 is provided on the inner surface of the connecting block 3. A groove 6 is provided on the side of the connecting block 4 away from the second fixed post 2. A groove 7, a sliding groove 8, and a limiting groove 9 are provided on the side of the first fixed post 1 close to the second fixed post 2. A telescopic mechanism 10 is provided between the first fixed post 1 and the second fixed post 2. A sliding rod 11 is rotatably installed on the outer surface of the telescopic mechanism 10. A limiting groove 12 is provided on the side of the sliding rod 11 away from the first fixed post 1, and a limiting rod 13 is inserted and installed on the side of the sliding rod 11 away from the first fixed post 1.

[0032] Specifically, the connecting assembly 5 includes a second slide rod 501, a movable plate 502, a first limiting block 503, a first spring 504, a third slide rod 505, a movable sleeve 506, a second spring 507, a second limiting block 508, a pull rod 509, and a third limiting groove 510. The outer surface of the second slide rod 501 is slidably connected to the movable plate 502. The first limiting block 503 is fixedly installed on the outer surface of the movable plate 502. The first spring 504 is fixedly installed on the side of the movable plate 502 away from the first limiting block 503. The inner surface of the connecting block 509 is fixedly installed with the third slide rod 505, and the outer surface of the third slide rod 505 is slidably connected to the movable sleeve 506, a second spring 507, a second limiting block 508, a pull rod 509, and a third limiting groove 510. The movable sleeve 506 has a spring 507 fixedly installed on its outer surface, a limit block 508 fixedly installed on its inner surface, and a pull rod 509 fixedly installed on its outer surface. A limit groove 510 is opened at the end of the connecting block 4 away from the second fixed post 2. The end of the movable plate 502 is inclined. The limit block 503 and the limit block 508 are located on the same side of the movable plate 502. The limit block 503 and the limit groove 510 are compatible. The first fixed post 1 and the second fixed post 2 have the same structure. The connecting block 3 and the connecting block 4 are plugged in. The advantage is that when the operator pulls the lever 509, the lever 509 moves the movable sleeve 506 towards the first fixed post 1. The second spring 507 contracts. During this movement, the second limiting block 508 presses against the movable plate 502, and the first spring 504 contracts, causing the movable plate 502 to move inward. This causes the first limiting block 503 to move inward, allowing it to be inserted into the connecting block 3. Then, the connecting block 3 is inserted into the groove 6, so that the first limiting block 503 and the limiting groove 6 are aligned. The center lines of 10 are located on the same vertical line. Then, the pull rod 509 is released, the spring 2 507 rebounds, and the contact plate 502 is pressed. The limit block 2 508 returns to its original position. At the same time, the spring 1 504 rebounds, pushing the limit block 1 503 into the interior of the limit groove 3 510. This allows for the quick installation of the connecting block 1 3 and the connecting block 2 4, thus enabling quick connection between adjacent fixed columns. After the connection is completed, the adjacent fixed columns can rotate. This is suitable for highways with different road conditions and has high adaptability.

[0033] Specifically, the telescopic mechanism 10 includes a rotating shaft 1001, connecting rod one 1002, connecting rod two 1003, connecting rod three 1004, and connecting rod four 1005. The rotating shaft 1001 is rotatably mounted on the inner surface of the groove two 7. Connecting rod one 1002 and connecting rod two 1003 are fixedly mounted on the outer surface of the rotating shaft 1001. Connecting rod three 1004 is rotatably mounted on the outer surface of connecting rod two 1003, and connecting rod four 1005 is rotatably mounted on the outer surface of connecting rod three 1004. Connecting rod one 1002 and connecting rod four 1005 are rotatably mounted. Multiple identical connecting rods three 1004 and connecting rod four 1005 are provided, and these multiple connecting rods three 1004 and connecting rod four 1005 are evenly spaced. The advantage is that, through the design of the telescopic mechanism 10, when it is necessary to adjust the distance between the first fixed post 1 and the second fixed post 2, it is only necessary to pull the first fixed post 1 or the second fixed post 2 in the opposite direction. The structure is simple and highly practical.

[0034] Specifically, the sliding rod 11 and the sliding groove 8 are slidably connected. The limiting rod 13 extends through the limiting groove 12 and the limiting groove 9 into the interior of the first fixed post 1. Multiple identical limiting grooves 9 are provided, and these grooves are evenly spaced. The advantage is that when adjusting the distance between the first fixed post 1 and the second fixed post 2, the sliding rod 11 slides within the sliding groove 8, providing guidance and high stability. When the distance between the first fixed post 1 and the second fixed post 2 is adjusted, extending the limiting rod 13 through the limiting groove 12 and the limiting groove 9 into the interior of the first fixed post 1 allows for quick positioning of the telescopic mechanism 10, preventing movement during use and ensuring high stability.

[0035] Example 2: Figure 2-8 As shown, this is an improvement on the previous embodiment.

[0036] Specifically, a fixing rod 19 is fixedly installed at the end of the second fixing column 2 away from the base 14. A rotating rod 20 is rotatably installed on the outer surface of the fixing rod 19. A slot 21 is opened at the end of the rotating rod 20 away from the fixing rod 19. A fixing rod 22 is fixedly installed at the end of the first fixing column 1 away from the base 14. The fixing rod 22 is adapted to the slot 21. The advantage is that during transportation, the telescopic mechanism 10 can be retracted. After retraction, the operator rotates the rotating rod 20 to make the fixing rod 22 engage with the slot 21, which can achieve quick overall retraction, reduce the space required for transportation, reduce the workload during transportation, and improve transportation efficiency.

[0037] Specifically, a guide rod 16 is fixedly installed on the side of the base 14 near the first fixed column 1, and a counterweight 17 is provided on the side of the base 14 near the first fixed column 1. A guide groove 18 is formed on the side of the counterweight 17 away from the base 14. The counterweight 17 and the guide rod 16 are plugged in, and the cross-section of the counterweight 17 is U-shaped. The advantage is that, through the cooperation of the guide rod 16 and the guide groove 18, during use, the operator inserts the guide rod 16 into the guide groove 18, making the counterweight 17 contact the base 14, which allows for quick installation of the counterweight 17. The design of the counterweight 17 lowers the overall center of gravity, making it less prone to tipping over during use, thereby improving overall stability. During transportation, the counterweight 17 can be removed, reducing the workload during transport and improving work efficiency.

[0038] Specifically, a reinforcing rod 15 is fixedly installed on the side of the base 14 near the first fixed post 1. The other end of the reinforcing rod 15 is also fixedly installed to the first fixed post 1. The reinforcing rod 15 is inclined at an angle of 45°, and the cross-section of the combination of the first fixed post 1, the base 14, and the reinforcing rod 15 forms a triangular structure. The advantage is that, due to the stability of a triangle, the design of the reinforcing rod 15 further connects the base 14 and the first fixed post 1, resulting in a triangular cross-section for the combination of the first fixed post 1, the base 14, and the reinforcing rod 15, thereby improving the overall stability and robustness.

[0039] Working principle: During installation, the operator pulls the lever 509, which moves the movable sleeve 506 towards the first fixed post 1. Spring 507 retracts, and during this movement, limiting block 508 presses against the movable plate 502. Spring 504 retracts, causing the movable plate 502 to move inward, thus moving limiting block 503 inward until it is inserted into connecting block 3. Connecting block 3 is then inserted into groove 6, ensuring that the center lines of limiting block 503 and limiting groove 510 are aligned vertically. The lever 509 is then released, spring 507 rebounds, and it presses against the movable plate 502 again. Limiting block 508 then returns to its original position. Returning to its original position, spring 504 rebounds, pushing limit block 503 into limit groove 510, enabling quick installation of connecting block 3 and connecting block 4. This allows for rapid connection between adjacent fixed posts, and after connection, adjacent fixed posts can rotate. Suitable for highways with different road conditions, it has high adaptability. During use, due to the stability of a triangle, the reinforcing rod 15 further connects the base 14 to the first fixed post 1, making the cross-section of the first fixed post 1, base 14, and reinforcing rod 15 form a "triangular" structure, thereby improving overall stability and robustness. The guide rod 16 and guide groove 18... In use, the operator inserts the guide rod 16 into the guide groove 18, causing the counterweight 17 to contact the base 14, enabling quick installation of the counterweight 17. The design of the counterweight 17 lowers the overall center of gravity, making it less prone to tipping over during use and thus improving overall stability. During transportation, the counterweight 17 can be removed, reducing workload and improving efficiency. When adjusting the distance between the first fixed column 1 and the second fixed column 2, the telescopic mechanism 10 allows for easy adjustment by simply pulling either the first fixed column 1 or the second fixed column 2 in opposite directions. The structure is simple and highly practical. When the distance between the second fixed posts 2 is adjusted, the sliding rod 11 slides inside the sliding groove 8, which plays a guiding role and has high stability. When the distance between the first fixed post 1 and the second fixed post 2 is adjusted, the limiting rod 13 extends through the limiting groove 2 12 and the limiting groove 1 9 into the interior of the first fixed post 1, which can quickly limit the telescopic mechanism 10. During use, it is not easy for it to move and has high stability. During transportation, the telescopic mechanism 10 can be retracted. After retraction, the operator rotates the rotating rod 20 so that the fixing rod 22 is inserted into the groove 21, which can realize the overall quick retraction, reduce the space during transportation, reduce the working pressure during transportation, and improve transportation efficiency.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable guardrail for municipal highway construction, comprising a first fixed post (1), a second fixed post (2), and a base (14), characterized in that: A connecting block 1 (3) is fixedly installed on the side of the first fixed post (1) away from the second fixed post (2). A connecting block 2 (4) is fixedly installed on the side of the second fixed post (2) away from the first fixed post (1). A connecting component (5) is provided on the inner surface of the connecting block 1 (3). A groove 1 (6) is provided on the side of the connecting block 2 (4) away from the second fixed post (2). A groove 2 (7), a sliding groove (8), and a limiting groove 1 (9) are provided on the side of the first fixed post (1) close to the second fixed post (2). A telescopic mechanism (10) is provided between the first fixed post (1) and the second fixed post (2). A sliding rod 1 (11) is rotatably installed on the outer surface of the telescopic mechanism (10). A limiting groove 2 (12) is provided on the side of the sliding rod 1 (11) away from the first fixed post (1). A limiting rod (13) is inserted and installed on the side of the sliding rod 1 (11) away from the first fixed post (1).

2. The adjustable guardrail for municipal highway construction according to claim 1, characterized in that: The connecting assembly (5) includes a second slide rod (501), a movable plate (502), a first limiting block (503), a first spring (504), a third slide rod (505), a movable sleeve (506), a second spring (507), a second limiting block (508), a pull rod (509), and a third limiting groove (510). The outer surface of the second slide rod (501) is slidably connected to the movable plate (502). The outer surface of the movable plate (502) is fixedly installed with the first limiting block (503). The side of the movable plate (502) away from the first limiting block (503) is fixedly installed with the first spring (504). The inner surface of the first connecting block (3) is fixedly installed with the third slide rod (505). The outer surface of the third slide rod (505) is slidably connected to the movable sleeve (510). 06), a spring two (507) is fixedly installed on the outer surface of the movable sleeve (506), a limit block two (508) is fixedly installed on the inner surface of the movable sleeve (506), a pull rod (509) is fixedly installed on the outer surface of the movable sleeve (506), a limit groove three (510) is opened at the end of the connecting block two (4) away from the second fixed column (2), the end of the movable plate (502) is inclined, the limit block one (503) and the limit block two (508) are located on the same side of the movable plate (502), the limit block one (503) and the limit groove three (510) are adapted to each other, the first fixed column (1) and the second fixed column (2) have the same structure, and the connecting block one (3) and the connecting block two (4) are plugged in.

3. The adjustable guardrail for municipal highway construction according to claim 1, characterized in that: The telescopic mechanism (10) includes a rotating shaft (1001), a connecting rod one (1002), a connecting rod two (1003), a connecting rod three (1004), and a connecting rod four (1005). The rotating shaft (1001) is rotatably mounted on the inner surface of the groove two (7). The connecting rod one (1002) and the connecting rod two (1003) are fixedly mounted on the outer surface of the rotating shaft (1001). The connecting rod three (1004) is rotatably mounted on the outer surface of the connecting rod two (1003). The connecting rod four (1005) is rotatably mounted on the outer surface of the connecting rod three (1004). The connecting rod one (1002) and the connecting rod four (1005) are rotatably mounted. There are multiple identical connecting rods three (1004) and connecting rod four (1005). The multiple connecting rods three (1004) and connecting rod four (1005) are distributed at equal intervals.

4. The adjustable guardrail for municipal highway construction according to claim 1, characterized in that: The sliding rod (11) and the sliding groove (8) are slidably connected. The limiting rod (13) extends through the limiting groove (12) and the limiting groove (9) to the interior of the first fixed column (1). The limiting groove (9) has multiple identical openings, and the multiple limiting grooves (9) are distributed at equal intervals.

5. An adjustable guardrail for municipal highway construction according to claim 1, characterized in that: The second fixing post (2) is fixedly installed with a fixing rod (19) at one end away from the base (14). A rotating rod (20) is rotatably installed on the outer surface of the fixing rod (19). A slot (21) is opened at one end of the rotating rod (20) away from the fixing rod (19). The first fixing post (1) is fixedly installed with a fixing rod (22) at one end away from the base (14). The fixing rod (22) is adapted to the slot (21).

6. An adjustable guardrail for municipal highway construction according to claim 1, characterized in that: A guide rod (16) is fixedly installed on the side of the base (14) near the first fixed column (1). A counterweight plate (17) is provided on the side of the base (14) near the first fixed column (1). A guide groove (18) is provided on the side of the counterweight plate (17) away from the base (14). The counterweight plate (17) and the guide rod (16) are installed by insertion. The cross section of the counterweight plate (17) is U-shaped.

7. An adjustable guardrail for municipal highway construction according to claim 1, characterized in that: A reinforcing rod (15) is fixedly installed on the side of the base (14) near the first fixed column (1). The other end of the reinforcing rod (15) is fixedly installed with the first fixed column (1). The reinforcing rod (15) is inclined at an angle of 45°. The cross-section of the combination of the first fixed column (1), the base (14) and the reinforcing rod (15) is a triangular structure.

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