Lifting device for highway building construction

Abstract

The invention provides a lifting device for highway building construction, and relates to the technical field of guardrail plate lifting. Reinforcing rods are fixedly connected to the two sides of the mounting plate, fixed winches are rotationally connected to the reinforcing rods, a connecting rod is fixedly connected to the middle positions of the two oppositely-arranged reinforcing rods, an adjusting rod is slidably connected to the connecting rod, a movable winch is fixedly connected to the adjusting rod, and a connecting lifting rope is fixedly connected to the connecting rod. The connecting lifting rope is wound and connected to the movable winch and the fixed winch and extends towards one end of the horizontal plane; a clamping mechanism is arranged at the end, close to the horizontal plane, of the connecting lifting rope and used for clamping the guardrail plate. The guardrail plate can be rapidly positioned, and when the guardrail plate is installed on an inclined road condition, the height of the single side of the guardrail plate can be adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of guardrail plate hoisting, and in particular to a hoisting device for highway construction. Background Art

[0002] Guardrails can effectively prevent vehicles from running off the road due to operating errors by drivers, bad weather or poor road conditions, thereby reducing the occurrence of traffic accidents. At the same time, installing guardrails on both sides of the road can protect the safety of pedestrians or other non-motor vehicle users to a certain extent, and reduce the possibility of collisions between vehicles and pedestrians or other non-motor vehicles.

[0003] When installing guardrails, it is necessary to mark both sides of the highway building, dig holes at the marked locations, place the posts in the holes, adjust the verticality and horizontal position, and then tamp them. Use a lifting device to move the connecting plate, use the connection to install the guardrails and posts in place, and adjust the position and angle.

[0004] Referring to the Chinese patent document with publication number CN113501451A and subject name being a guardrail panel lifting device, the device facilitates the installation of the guardrail panel by placing the guardrail panel on a guardrail repair vehicle, lifting the guardrail panel through a sling mechanism and placing it until it is suitable when installing the guardrail panel.

[0005] According to the above technical solution, when the staff installs the guardrail board, the staff needs to move the hoisted guardrail board toward the side of the column, and manually adjust the position between the connecting hole on the guardrail board and the connecting hole on the column after moving the guardrail board, and push the guardrail board against the column after adjusting the position, and drive the connecting bolts into the connecting holes to install the guardrail board. When the heights between adjacent columns are not uniform, multiple staff members are required to cooperate to adjust the installation of the guardrail board, and the operation is relatively cumbersome. Summary of the invention

[0006] In view of this, the present application provides a lifting device for highway construction, which aims to solve the problem of inconvenient positioning of guardrail panels when installing the guardrail panels.

[0007] The lifting device for highway construction provided by the present application adopts the following technical scheme, including a support frame, an upward moving mechanism arranged on the support frame and a mounting plate arranged in the upward moving mechanism; both sides of the mounting plate are fixedly connected with reinforcing rods, the reinforcing rods are rotatably connected with a fixed winch, and a connecting rod is fixedly connected to the middle position of two relatively arranged reinforcing rods, the connecting rod is slidably connected with an adjusting rod, the adjusting rod is fixedly connected with a mobile winch, the connecting rod is fixedly connected with a connecting rope, the connecting rope is fixedly connected with the connecting rod, the connecting rope is wound around and connected to the mobile winch and the fixed winch, and extends toward one end of the horizontal plane; a clamping mechanism is provided at one end of the connecting rope close to the horizontal plane, the clamping mechanism includes a connecting platform slidably connected to one end of the connecting rope, a clamping block is laterally slidably connected to the connecting platform, an extension rod is fixedly connected to the clamping block, and the extension rod is slidably connected to a positioning rod at one end of the extension rod close to the connecting hole on the guardrail plate.

[0008] By moving the guardrail upward to the center, the guardrail can effectively play its blocking and guiding role when hit by a vehicle, reducing the risk of the vehicle running off the road. It can also reduce the adjustment and correction of the guardrail by the staff during installation, thereby improving the installation efficiency.

[0009] Optionally, an adjusting wheel is slidably connected to the mounting plate, a rotating rod is fixedly connected to the adjusting wheel, and the rotating rod passes through the connecting rod, a sliding groove is provided on the rotating rod, a rotating gear is slidably connected to the rotating rod, a sliding block is fixedly connected to the inner side wall of the rotating gear, the sliding block is slidably connected in the sliding groove, a lowering rack is fixedly connected to the adjusting rod, the lowering rack is meshed with the rotating gear, and the rotating gear is used to drive the adjusting rod to move up or down.

[0010] When installing guardrails on some undulating sections of road, by moving one side of the guardrail upward, the guardrail can be more adaptable to changes in the road section, and the flexibility of the guardrail installation can be improved, and the guardrail can be quickly adjusted between columns of different heights.

[0011] Optionally, one end of the adjusting wheel close to the mounting plate is fixedly connected to a fixed tooth block, and one end of the mounting plate close to the adjusting wheel is fixedly connected to a fixed block, and the fixed block is provided with a fixing groove that can engage with the fixed tooth block.

[0012] By fixing the position of the rotating rod, the shaking of the guardrail plate during installation can be reduced, and the metal fatigue of the guardrail plate caused by vibration or collision can be reduced, thereby extending the service life of the guardrail plate and its connecting parts.

[0013] Optionally, the clamping mechanism also includes two clamping blocks slidably connected to a single connecting platform, the two clamping blocks are respectively arranged at two ends of the connecting platform, and the clamping blocks are fixedly connected to abutment rollers that abut against the side walls of the guardrail plate.

[0014] Optionally, a rotating pair of rollers is fixedly connected to the connecting platform, the connecting rope is arranged to pass through the middle position of the rotating pair of rollers, and the connecting rope is arranged on one side of the connecting platform, and a reversing winch is fixedly connected to the side of the connecting platform close to the connecting rope, and one end of the connecting rope is fixedly connected to the clamping block on the opposite side.

[0015] Optionally, an abutment block is fixedly connected to one side of the connecting platform close to the horizontal plane, and push springs for pushing the clamping blocks to move away from each other are fixedly connected to both sides of the abutment block, and one end of the push spring away from the abutment block is fixedly connected to the clamping block.

[0016] Optionally, the upward movement mechanism also includes a fixed connecting rod fixedly connected to the support frame, the fixed connecting rod is arranged perpendicular to the horizontal plane, and a parallel connecting rod is rotatably connected to the fixed connecting rod. Two parallel connecting rods are provided, and the two parallel connecting rods are arranged relatively parallel to each other. The mounting plate and the parallel connecting rod are rotatably connected.

[0017] When the mounting plate is moved upward, the mounting plate is always kept in a vertical state, which can make it easier to accurately align the fixing points between the guardrail plate and the column and improve the installation accuracy.

[0018] Optionally, an adjusting cylinder is fixedly connected to the support frame, and the output shaft of the adjusting cylinder is fixedly rotatably connected to a parallel connecting rod at one end close to the horizontal plane, and the adjusting cylinder is used to adjust the horizontal height of the mounting plate.

[0019] By moving the guardrail upward to the center, the guardrail can effectively play its blocking and guiding role when hit by a vehicle, reducing the risk of the vehicle running off the road. It can also reduce the adjustment and correction of the guardrail by the staff during installation, thereby improving the installation efficiency.

[0020] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects: 1. By moving the guardrail upward to the center, the guardrail can effectively play its blocking and guiding role when hit by a vehicle, reducing the risk of the vehicle running off the road, and can reduce the adjustment and correction of the guardrail by the staff during installation, thereby improving the installation efficiency.

[0021] 2. When installing guardrails on some undulating sections of the road, by moving one side of the guardrail upward, the guardrail can be more adaptable to changes in the road section, and the flexibility of the guardrail installation can be improved, and the guardrail can be quickly adjusted between columns of different heights.

[0022] 3. By fixing the position of the rotating rod, the shaking of the guardrail during installation can be reduced, and the metal fatigue of the guardrail caused by vibration or collision can be reduced, thereby extending the service life of the guardrail and its connecting parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a lifting device for highway construction according to this embodiment; Figure 2 This is a schematic diagram of the structure of the mounting plate and the reinforcing rod of this embodiment; Figure 3 This is a schematic diagram of the structure of the reinforcing rod and the connecting rod of this embodiment; Figure 4 This is a schematic diagram of the structure of the connection station of this embodiment; Figure 5 This is a schematic diagram of the structure of the abutment block and the push spring of this embodiment; Figure 6 This is a schematic diagram of the structure of the adjusting wheel in this embodiment; Figure 7 is a schematic structural diagram of the rotating rod of this embodiment; Figure 8 For this embodiment Figure 3 A partial enlarged view of area A in the middle.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. Support frame; 2. Upward movement mechanism; 21. Mounting plate; 22. Fixed connecting rod; 23. Parallel connecting rod; 24. Adjusting cylinder; 3. Reinforcing rod; 31. Fixed capstan; 32. Connecting rod; 33. Adjusting rod; 34. Moving capstan; 35. Connecting rope; 4. Clamping mechanism; 41. Connecting table; 42. Clamping block; 43. Extension rod; 44. Positioning rod; 45. Abutting roller; 46. Rotating pair of rollers; 47. Reversing capstan; 48. Abutting block; 49. Pushing spring; 5. Adjusting wheel; 51. Rotating rod; 52. Sliding groove; 53. Rotating gear; 54. Sliding block; 55. Lowering rack; 56. Fixed gear block; 57. Fixed block; 58. Fixed groove. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the embodiments of the present application. Figure 1-Figure 8, the technical scheme of the embodiment of the present application is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0026] like Figure 1 As shown, this embodiment provides a lifting device for highway construction, including a support frame 1, an upward moving mechanism 2, a connecting mechanism, a clamping mechanism 4 and an adjusting mechanism. The upward moving mechanism 2 is arranged on the support frame 1, and a mounting plate 21 is arranged in the upward moving mechanism 2. The connecting mechanism is arranged on the mounting plate 21, and the connecting mechanism is used to drive the guardrail plate to move upward. The clamping mechanism 4 is arranged at one end close to the guardrail plate, and the clamping mechanism 4 is used to clamp both sides of the guardrail plate. The adjusting mechanism is arranged on the mounting plate 21, and the adjusting mechanism is used to adjust the upward moving angle of the guardrail plate.

[0027] like Figure 1 As shown, the upward movement mechanism 2 also includes a fixed link 22, a parallel link 23, and an adjusting cylinder 24. The fixed link 22 is fixedly connected to the support frame 1, and the fixed link 22 is arranged perpendicular to the horizontal plane. Two parallel links 23 are arranged, and the two parallel links 23 are rotatably connected to the fixed link 22. The two parallel links 23 are arranged parallel to each other, and one end of the two parallel links 23 away from the fixed link 22 is rotatably connected to the mounting plate 21. The adjusting cylinder 24 is fixedly connected to the support frame 1, and one end of the adjusting cylinder 24 away from the support frame 1 is rotatably connected to the parallel link 23. When it is necessary to adjust the vertical distance between the mounting plate 21 and the horizontal plane, the adjusting cylinder 24 is started to extend the output shaft of the adjusting cylinder 24. After the output shaft of the adjusting cylinder 24 is extended, it drives the parallel connecting rod 23 close to one end of the horizontal plane to move upward. When the parallel connecting rod 23 moves upward, it drives the mounting plate 21 to move upward. Since the two parallel connecting rods 23 are arranged parallel to each other, the two parallel connecting rods 23 move upward synchronously, so that the mounting plate 21 is always moved upward in a manner perpendicular to the horizontal plane.

[0028] like Figure 1 , Figure 2 and Figure 3As shown, the connecting mechanism includes a reinforcing rod 3, a fixed winch 31, a connecting rod 32, an adjusting rod 33, a movable winch 34 and a connecting rope 35. The reinforcing rod 3 is fixedly connected to the mounting plate 21, and in this embodiment, two reinforcing rods 3 are provided, and the two reinforcing rods 3 are arranged opposite to each other. The fixed winch 31 is rotatably connected to the reinforcing rod 3, and two are fixedly connected to a single reinforcing rod 3. The two fixed winches 31 are arranged at both ends of the reinforcing rod 3, the connecting rod 32 is fixedly connected to the reinforcing rod 3, and the two ends of the connecting rod 32 are respectively fixedly connected to the two oppositely arranged reinforcing rods 3, and two connecting rods 32 are provided. The adjusting rod 33 is slidably connected to the single connecting rod 32, and two adjusting rods 33 are arranged on the single connecting rod 32. The movable winch 34 is rotatably connected to the single adjusting rod 33. The connecting rope 35 is fixedly connected to the connecting rod 32, and in this embodiment, four connecting ropes 35 are provided, and a single connecting rope 35 is respectively wound around and connected to a single movable winch 34 and a fixed winch 31.

[0029] like Figure 2 , Figure 3 and Figure 4 As shown, the clamping mechanism 4 includes a connecting platform 41, a clamping block 42, an extension rod 43, a positioning rod 44, an abutting roller 45, a rotating roller pair 46 and a reversing capstan 47. The connecting platform 41 is slidably connected to the connecting rope 35. The rotating roller pair 46 is rotatably connected to the end of the connecting platform 41 away from the horizontal plane, and two groups of rotating roller pairs 46 are arranged on a single connecting platform 41. A single connecting rope 35 is slidably connected to the middle position of a single group of rotating roller pairs 46. The reversing capstan 47 is rotatably connected to one side of the connecting platform 41 close to the horizontal plane, and at both ends of the single connecting platform 41 They are all rotatably connected to a single reversing winch 47, a single connecting rope 35 is wound around the single reversing winch 47, a clamping block 42 is slidably connected to the connecting platform 41, and two clamping blocks 42 are provided in this embodiment, the single connecting rope 35 is fixedly connected to the clamping block 42 away from one end of the connecting rope 35, the abutment roller 45 is rotatably connected to the single clamping block 42, an extension rod 43 is fixedly connected to one of the clamping blocks 42, a positioning rod 44 is slidably connected to the extension rod 43, and the extension rod 43 can pass through the connecting hole on the guardrail plate after sliding.

[0030] like Figure 5 As shown, an abutment block 48 is fixedly connected to one side of the connecting platform 41 close to the horizontal plane, and push springs 49 for pushing the clamping block 42 to move away from each other are fixedly connected to both sides of the abutment block 48, and one end of the push spring 49 away from the abutment block 48 is fixedly connected to the clamping block 42.

[0031] like Figure 6 , Figure 7 and Figure 8As shown, the adjustment mechanism includes an adjustment wheel 5, a rotating rod 51, a rotating gear 53, a sliding block 54, a downward rack 55, a fixed gear block 56, a fixed block 57 and a fixed groove 58. The adjustment wheel 5 is slidably connected to the mounting plate 21, the rotating rod 51 is fixedly connected to the adjustment wheel 5, and the rotating rod 51 is arranged through the mounting plate 21 and through the connecting rod 32. The connecting rod 32 is provided with a sliding groove 52, the rotating gear 53 is slidably connected to the rotating rod 51, and the sliding block 54 is fixedly connected to the rotating gear The lower rack 55 is fixedly connected to the adjusting rod 33 and is arranged toward one side of the rotating gear 53. The rotating gear 53 can mesh with the lower rack 55 and drive the lower rack 55 to move up or down. The fixed tooth block 56 is fixedly connected to the side of the adjusting wheel 5 close to the mounting plate 21. The fixed block 57 is fixedly connected to the mounting plate 21, and the fixed block 57 is provided with a fixed groove 58 that can mesh with the fixed tooth block 56.

[0032] When the present application is in use, the staff stands up the guardrail board and pulls the single connecting platform 41 toward one side of the guardrail board, so that the extension rod 43 of the connecting platform 41 moves to the connection hole position of the guardrail board, and after the movement, pushes the positioning rod 44 toward the connection hole of the guardrail board, so that the positioning rod 44 passes through the connection hole, so that the guardrail board is in a centered state at this time.

[0033] Start the adjusting cylinder 24 to make the output shaft of the adjusting cylinder 24 rise. After the output shaft of the adjusting cylinder 24 extends, it drives the parallel connecting rod 23 close to one end of the horizontal plane to move upward. When the parallel connecting rod 23 moves upward, it drives the mounting plate 21 to move upward. Since the two parallel connecting rods 23 are arranged parallel to each other, the two parallel connecting rods 23 move upward synchronously, so that the mounting plate 21 is always moved upward in a manner perpendicular to the horizontal plane.

[0034] When the mounting plate 21 moves upward, since the length of the connecting rope 35 is certain, when the mounting plate 21 moves upward to a certain extent, the two relatively arranged clamping blocks 42 move towards each other driven by the connecting rope 35. When the two clamping blocks 42 approach each other, the abutting rollers 45 on the clamping blocks 42 abut against the two sides of the guardrail plate and clamp the guardrail plate.

[0035] After the guardrail plate is clamped, the staff pulls the adjusting wheel 5 to move the fixed tooth block 56 on the adjusting wheel 5 out of the fixed groove 58 on the fixed block 57. When the fixed tooth block 56 moves out, the adjusting gear is turned to make the adjusting gear rotate. After the adjusting gear rotates, it drives the downward rack 55 to move up and down. When the adjusting rack moves up and down, it drives the adjusting rod 33 to move up and down, adjusts the height of the connecting platform 41, moves the connecting platform 41 to a certain extent, and makes the connecting hole on the guardrail plate correspond to the connecting hole on the column. The staff pushes the guardrail plate toward the column, and uses connecting bolts to install the positions of the remaining connecting holes on the guardrail plate. After installation, the staff pulls the positioning rod 44 to move the positioning rod 44 out of the connecting hole, and installs the connecting bolts at this position.

[0036] When installing part of the guardrail board, one side of the guardrail board needs to be lifted so that the guardrail is connected to the column at a certain tilt angle. In this state, the adjustment wheel 5 on one side is turned to raise one side of the guardrail board to adapt to the angle between the column.

[0037] In this embodiment, by positioning the connecting holes, it can ensure that the guardrail plate is accurately aligned with the column, reducing installation errors, and positioning the connecting holes can simplify the installation process, reduce the time for adjustment and repositioning, thereby speeding up the overall installation speed and reducing the labor intensity of the staff.

[0038] In this embodiment, by moving the guardrail plate upward and centering it, the guardrail plate can effectively play its blocking and guiding role when hit by a vehicle, reducing the risk of the vehicle running off the road, and can also reduce the adjustments and corrections made by staff during the installation of the guardrail plate, thereby improving installation efficiency.

[0039] In this embodiment, when the mounting plate 21 is moved upward, the mounting plate 21 is always kept in a vertical state, which can more easily protect the precise alignment of the fixing points between the guardrail plate and the column and improve the installation accuracy.

[0040] In this embodiment, when installing guardrails on some undulating road sections, by moving one side of the guardrail upward, the guardrail can be more adaptable to changes in the road section, and the flexibility of the guardrail installation can be improved, and the guardrail can be quickly adjusted between columns of different heights.

[0041] The implementation principle of a lifting device for highway construction in the embodiment of the present application is as follows: the worker erects the guardrail board, and pulls the single connecting platform 41 toward one side of the guardrail board, so that the extension rod 43 of the connecting platform 41 moves to the position of the connecting hole of the guardrail board, and after the movement, pushes the positioning rod 44 toward the connecting hole of the guardrail board, so that the positioning rod 44 penetrates into the connecting hole, so that the guardrail board is in a centered state at this time.

[0042] Start the adjusting cylinder 24 to make the output shaft of the adjusting cylinder 24 rise. After the output shaft of the adjusting cylinder 24 extends, it drives the parallel connecting rod 23 close to one end of the horizontal plane to move upward. When the parallel connecting rod 23 moves upward, it drives the mounting plate 21 to move upward. Since the two parallel connecting rods 23 are arranged parallel to each other, the two parallel connecting rods 23 move upward synchronously, so that the mounting plate 21 is always moved upward in a manner perpendicular to the horizontal plane.

[0043] When the mounting plate 21 moves upward, since the length of the connecting rope 35 is certain, when the mounting plate 21 moves upward to a certain extent, the two relatively arranged clamping blocks 42 move towards each other driven by the connecting rope 35. When the two clamping blocks 42 approach each other, the abutting rollers 45 on the clamping blocks 42 abut against the two sides of the guardrail plate and clamp the guardrail plate.

[0044] After the guardrail plate is clamped, the staff pulls the adjusting wheel 5 to move the fixed tooth block 56 on the adjusting wheel 5 out of the fixed groove 58 on the fixed block 57. When the fixed tooth block 56 moves out, the adjusting gear is turned to make the adjusting gear rotate. After the adjusting gear rotates, it drives the downward rack 55 to move up and down. When the adjusting rack moves up and down, it drives the adjusting rod 33 to move up and down, adjusts the height of the connecting platform 41, moves the connecting platform 41 to a certain extent, and makes the connecting hole on the guardrail plate correspond to the connecting hole on the column. The staff pushes the guardrail plate toward the column, and uses connecting bolts to install the positions of the remaining connecting holes on the guardrail plate. After installation, the staff pulls the positioning rod 44 to move the positioning rod 44 out of the connecting hole, and installs the connecting bolts at this position.

[0045] When installing part of the guardrail board, one side of the guardrail board needs to be lifted so that the guardrail is connected to the column at a certain tilt angle. In this state, the adjustment wheel 5 on one side is turned to raise one side of the guardrail board to adapt to the angle between the column.

[0046] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A lifting device for highway construction, comprising a support frame (1), an upward movement mechanism (2) arranged on the support frame (1), and a mounting plate (21) arranged in the upward movement mechanism (2), characterized in that: Both sides of the mounting plate (21) are fixedly connected to reinforcing rods (3), a fixed winch (31) is rotatably connected to the reinforcing rods (3), a connecting rod (32) is fixedly connected to the middle position of the two oppositely arranged reinforcing rods (3), an adjusting rod (33) is slidably connected to the connecting rod (32), a movable winch (34) is fixedly connected to the adjusting rod (33), a connecting rope (35) is fixedly connected to the connecting rod (32), the connecting rope (35) is wound around and connected to the movable winch (34) and the fixed winch (31), and extends toward one end of the horizontal plane; A clamping mechanism (4) is provided at one end of the connecting rope (35) close to the horizontal plane. The clamping mechanism (4) is used to clamp the guardrail plate. The clamping mechanism (4) comprises a connecting platform (41) slidably connected to one end of the connecting rope (35). A clamping block (42) is slidably connected to the connecting platform (41). An extension rod (43) is fixedly connected to the clamping block (42). A positioning rod (44) is slidably connected to one end of the extension rod (43) close to the connection hole on the guardrail plate.

2. A lifting device for highway construction according to claim 1, characterized in that: The mounting plate (21) is slidably connected to an adjusting wheel (5), the adjusting wheel (5) is fixedly connected to a rotating rod (51), and the rotating rod (51) passes through the connecting rod (32), a sliding groove (52) is provided on the rotating rod (51), a rotating gear (53) is slidably connected to the rotating rod (51), a sliding block (54) is fixedly connected to the inner side wall of the rotating gear (53), and the sliding block (54) is slidably connected in the sliding groove (52), and a lowering rack (55) is fixedly connected to the adjusting rod (33), the lowering rack (55) and the rotating gear (53) are meshed, and the rotating gear (53) is used to drive the adjusting rod (33) to move up or down.

3. A lifting device for highway construction according to claim 2, characterized in that: One end of the adjusting wheel (5) close to the mounting plate (21) is fixedly connected to a fixed tooth block (56), and one end of the mounting plate (21) close to the adjusting wheel (5) is fixedly connected to a fixed block (57), and the fixed block (57) is provided with a fixed groove (58) capable of meshing with the fixed tooth block (56).

4. A lifting device for highway construction according to claim 1, characterized in that: The clamping mechanism (4) further comprises two clamping blocks (42) slidably connected to the single connecting platform (41), the two clamping blocks (42) being respectively arranged at two ends of the connecting platform (41), and the clamping blocks (42) are both fixedly connected to abutting rollers (45) abutting against the side walls of the guardrail plate.

5. A lifting device for highway construction according to claim 4, characterized in that: The connecting platform (41) is fixedly connected to a rotating pair of rollers (46), a connecting rope (35) is arranged to pass through the middle position of the rotating pair of rollers (46), and the connecting rope (35) is arranged on one side of the connecting platform (41), a reversing capstan (47) is fixedly connected to one side of the connecting platform (41) close to the connecting rope (35), and one end of the connecting rope (35) is fixedly connected to a clamping block (42) on the opposite side.

6. A lifting device for highway construction according to claim 4, characterized in that: A contact block (48) is fixedly connected to one side of the connecting platform (41) close to the horizontal plane, and push springs (49) for pushing the two clamping blocks (42) to move away from each other are respectively fixedly connected to both sides of the contact block (48), and one end of the push spring (49) away from the contact block (48) is fixedly connected to the clamping block (42).

7. A lifting device for highway construction according to claim 1, characterized in that: The upward movement mechanism (2) further comprises a fixed connecting rod (22) fixedly connected to the support frame (1), the fixed connecting rod (22) being arranged perpendicular to the horizontal plane, a parallel connecting rod (23) being rotatably connected to the fixed connecting rod (22), two parallel connecting rods (23) being arranged relatively parallel, and the mounting plate (21) and the parallel connecting rod (23) being rotatably connected.

8. A lifting device for highway construction according to claim 7, characterized in that: An adjusting cylinder (24) is fixedly connected to the support frame (1), and an output shaft of the adjusting cylinder (24) is fixedly rotatably connected to a parallel connecting rod (23) at one end close to the horizontal plane. The adjusting cylinder (24) is used to adjust the horizontal height of the mounting plate (21).

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