Joint cutting device for free side of bridge anti-collision guardrail and construction method of joint cutting device

Abstract

The invention provides a joint cutting device for the free side of a bridge anti-collision guardrail and a construction method of the joint cutting device. The joint cutting device comprises a moving mechanism, a guide rail mechanism, a cutting mechanism and a traction mechanism. The moving mechanism is used for moving the device to the position of a bridge anti-collision guardrail needing joint cutting, and the guide rail mechanism is installed on one side of the moving mechanism. The guide rail mechanism is used for guiding the cutting mechanism; the cutting mechanism is installed on the guide rail mechanism and used for conducting joint cutting on the bridge anti-collision guardrail. The traction mechanism is arranged on the cutting mechanism and used for adjusting the height position of the cutting mechanism. According to the working platform, constructors can operate the cutting mechanism to conduct joint cutting operation on the bridge floor, and compared with a traditional mode that a simple hanging basket is adopted as a guardrail free face joint cutting working platform, the risk of edge high-altitude operation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly relates to a cutting device for the airside of a bridge anti-collision guardrail and a construction method thereof. Background Art

[0002] After the concrete of the bridge anti-collision guardrail is poured, in order to avoid shrinkage cracks in the concrete and affect the durability of the anti-collision guardrail, it is necessary to cut a 2-cm deep false joint along the whole body of the guardrail at intervals of 3 to 5 m. However, in actual construction, due to the inconvenience of cutting operations on the airside of the anti-collision guardrail, hanging baskets are mostly used for auxiliary operations on site, resulting in relatively high safety risks. Summary of the Invention

[0003] The purpose of the present invention is to provide a cutting device for the airside of a bridge anti-collision guardrail and a usage method thereof in view of the deficiencies of the prior art.

[0004] The specific technical solutions are as follows:

[0005] A cutting device for the airside of a bridge anti-collision guardrail includes a moving mechanism, a guide rail mechanism, a cutting mechanism, and a traction mechanism; the moving mechanism is used to move the device to the bridge anti-collision guardrail where cutting is required, and the guide rail mechanism is installed on one side of the moving mechanism; the guide rail mechanism is used to guide the cutting mechanism; the cutting mechanism is installed on the guide rail mechanism and is used to cut the bridge anti-collision guardrail; the traction mechanism is arranged on the cutting mechanism and is used to adjust the height position of the cutting mechanism.

[0006] Optionally, the moving mechanism includes a moving platform and four groups of rollers arranged at the bottom of the moving platform, so that the moving platform can move along the bridge deck.

[0007] Optionally, the guide rail mechanism includes two parallel guide rails, a connecting plate, a connecting rod, and a pulley. The connecting plate is fixedly connected to the tops of the two guide rails for fixing to the moving mechanism. The two ends of the connecting rod are respectively connected to the bottoms of the two guide rails, and the pulley is fixed to the connecting rod.

[0008] Optionally, the cutting mechanism includes a sliding member and a cutting member. The sliding member includes a first rod, a second rod, a connecting rod, and a sliding wheel. The first rod and the second rod are arranged parallel to each other from top to bottom along the length direction of the guide rail between the two parallel guide rails. The connecting rod is connected between the first rod and the second rod. The sliding wheels are arranged on the first rod and the second rod, and multiple sliding wheels are all slidably connected to the corresponding guide rails. The cutting member is arranged on the first rod and the second rod.

[0009] Optionally, the cutting member includes a bearing, an L-shaped connecting rod, a spring, a circular saw, a base, and a limiting circular plate. The bearing is rotatably connected to the second rod. The corner of the L-shaped connecting rod is fixed to the bearing. The spring is connected between one end of the L-shaped connecting rod and the first rod. The base is fixed to the other end of the L-shaped connecting rod. The circular saw is fixed to the base. The limiting circular plate is mounted on the circular saw and is concentrically arranged with the saw blade. The limiting circular plate can contact the concrete surface of the guardrail to control the cutting depth. One end of the spring in the stretched state is fixed to the first rod, and the other end pulls the L-shaped connecting rod to rotate around the bearing so that the circular saw is pressed against the anti-collision guardrail.

[0010] Optionally, the traction mechanism includes a first traction rope and a second traction rope. One end of the first traction rope is tied to the second rod, and then it bypasses the pulley and extends to the top of the anti-collision guardrail to pull the sliding member to move in the guide rail. One end of the second traction rope is tied to the first rod, and the other end also extends to the top of the anti-collision guardrail to lift the cutting mechanism that has completed the cutting operation to the top of the anti-collision guardrail.

[0011] Optionally, a flexible protective layer is provided at the edge of the limiting circular plate to prevent scratching the concrete surface of the guardrail during the cutting operation.

[0012] Optionally, the first traction rope and the second traction rope are high-strength nylon ropes.

[0013] Optionally, a wear-resistant coating is provided on the inner wall of the guide rail.

[0014] A method for using a cutting device for the airside of a bridge anti-collision guardrail includes the following steps:

[0015] S1. Pre-cutting step: Pre-cut a certain length of pre-cutting seams at a certain spacing and depth on the top of the anti-collision guardrail in advance.

[0016] S2. Installation step: Push the moving mechanism to the pre-cutting position, install the guide rail mechanism on the mobile platform, assemble the cutting mechanism and install it on the guide rail mechanism.

[0017] S3. Adjustment step: Adjust the moving mechanism again so that the saw blade of the circular saw is stuck in the pre-cutting seam, make the spring in the stretched state, and the circular saw is pressed against the anti-collision guardrail.

[0018] S4. Cutting step: Pull the first traction rope to drive the circular saw to slowly cut downwards. During the cutting operation, the spring always remains in the stretched state, and the circular saw is always pressed against the anti-collision guardrail.

[0019] S5. Lifting step: After the cutting is completed, pull the second traction rope to lift the cutting mechanism to the top of the guardrail.

[0020] S6. Repeat the steps: Push the moving mechanism to the next pre-cut seam, and repeat the adjustment step, the cutting seam step, and the lifting step until all the cutting seam work is completed.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] The method of the present invention enables construction workers to operate the cutting mechanism for cutting seam operations on the bridge deck. Compared with the traditional method of using a simple hanging basket as the cutting seam work platform for the airside of the guardrail, the risk of working at heights near the edge is avoided. Using two parallel channel steels as the guide rails of the cutting mechanism can ensure that the cutting seam line is straight; the spring members on the cutting mechanism are always in a stretched state. Under the action of the spring tension, during the entire process of cutting seam operations, the cutting saw can be pressed tightly against the guardrail. By using the rotation of the bearing, the resistance of the cutting mechanism to rotate is reduced. Installing a limiting circular plate on the circular saw can keep the cutting seam depth unchanged regardless of the magnitude of the spring tension, and avoid cutting into the internal steel bars of the guardrail. Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the cutting seam device of the present invention for the airside of the bridge anti-collision guardrail;

[0024] Figure 2 is the schematic diagram of the cutting seam mechanism in the cutting seam device of the present invention for the airside of the bridge anti-collision guardrail;

[0025] Figure 3 is the overall structural schematic diagram of the cutting seam device of the present invention for the airside of the bridge anti-collision guardrail during use;

[0026] Figure 4 is Figure 3 the enlarged view of the letter A in

[0027] Figure 5 is the structural schematic diagram of the cutting member in the cutting seam device of the present invention for the airside of the bridge anti-collision guardrail;

[0028] Figure 6 is the structural schematic diagram of the pre-cut seam on the anti-collision guardrail in the cutting seam device of the present invention for the airside of the bridge anti-collision guardrail.

[0029] In the figures: 10. Anti-collision guardrail; 101. Pre-cut seam; 20. Mobile gantry; 201. Support frame; 202. Extension rod; 30. Guide rail mechanism; 301. Guide rail; 302. Connecting plate; 303. Connecting rod; 304. Pulley; 40. Cutting seam mechanism; 401. L-shaped connecting rod; 402. Bearing; 403. Spring; 404. Circular saw; 405. Base; 406. Limiting circular plate; 407. Mobile base; 411. First rod; 412. Second rod; 413. Connecting rod; 414. Sliding wheel; 50. Towing mechanism; 501. First towing rope; 502. Second towing rope. Detailed implementation manners

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

[0033] The cutting device for the airside of the bridge anti-collision guardrail 10 provided in the present invention is referred to Figures 1-6 , and includes: a moving mechanism, a guide rail 301 mechanism 30, a cutting mechanism, and a traction mechanism 50; the moving mechanism is used to move the device to the bridge anti-collision guardrail 10 where a cut is required, and the guide rail 301 mechanism 30 is installed on one side of the moving mechanism; the guide rail 301 mechanism 30 is used to guide the cutting mechanism; the cutting mechanism is installed on the guide rail 301 mechanism 30 and is used to cut the bridge anti-collision guardrail 10; the traction mechanism 50 is arranged on the cutting mechanism and is used to adjust the height position of the cutting mechanism.

[0034] Specifically, in this embodiment, the guide rail 301 mechanism 30 provides guidance for the cutting mechanism, enabling the cutting mechanism to cut the bridge anti-collision guardrail 10 strictly along a predetermined path. Compared with traditional manual cutting or cutting methods without a guiding device, it can greatly reduce the deviation of the cutting path, ensure the straightness and flatness of the cut seam, and thus improve the accuracy of the entire cut-seam operation. The moving mechanism can move the entire device to the bridge anti-collision guardrail 10 where the cut seam is required and can adjust the position of the cutting mechanism along the length extension direction of the bridge anti-collision guardrail 10. The adjustment of the height position of the cutting mechanism by the traction mechanism 50 further enhances this flexibility, enabling it to adapt to anti-collision guardrails 10 of different heights and ensuring accurate cut-seam operations under different working conditions. For the cut-seam operation on the airside of the bridge anti-collision guardrail 10, traditional methods may have problems such as unstable worker operation and danger near the airside. However, through the cooperation of the moving mechanism, the guide rail 301 mechanism 30, the cutting mechanism, and the traction mechanism 50, this device can achieve remote operation or operation control at a relatively safe position. For example, workers can control the movement of the device to the designated position by controlling the moving mechanism away from the airside, and then use the traction mechanism 50 and the guide rail 301 mechanism 30 to control the cutting, reducing the exposure time and operation risk of workers on the airside and ensuring construction safety.

[0035] Referring to Figure 1 , the moving mechanism includes a moving platform 20 and four groups of rollers provided at the bottom of the moving platform 20, enabling the moving platform 20 to move along the bridge deck. The moving platform 20 includes a support frame 201 and an extension rod 202 fixed to the upper end of the support frame 201. The four groups of rollers are fixed to the bottom of the support frame 201. When the support frame 201 is close to the inner side of the anti-collision guardrail 10, the length of the extension rod 202 is set to extend beyond the outer side of the anti-collision guardrail 10 by a certain length, providing some buffer distance for the subsequent installation of the guide rail 301 mechanism 30, the cutting mechanism, and the traction mechanism 50.

[0036] Referring to Figure 2, the guide rail 301 mechanism 30 includes two parallel guide rails 301, a connecting plate 302, a connecting rod 413303, and a pulley 304. The connecting plate 302 is fixedly connected to the tops of the two guide rails 301 for fixing to the moving mechanism. The two ends of the connecting rod 413303 are respectively connected to the bottoms of the two guide rails 301, and the pulley 304 is fixed to the connecting rod 413303. The guide rail 301 is composed of two parallel channel steels. The connecting plate 302 is welded to the top of the channel steel. The connecting plate 302 and the top cross bar are fixedly connected by bolts, which facilitates the removal of the guide rail 301 mechanism 30. The two parallel guide rails 301 provide a guiding path for the cutting mechanism. Due to the straightness and flatness of the guide rail 301, after the cutting mechanism is installed on the pulley 304, the pulley 304 rolls along the guide rail 301, so that the cutting mechanism can only move along the direction of the guide rail 301, thus ensuring the accuracy of the cutting path; the connecting plate 302 connects the guide rail 301 and the moving mechanism together, ensuring the fixed position of the guide rail 301 relative to the moving mechanism, so that when the moving mechanism moves, the guide rail 301 can be accurately located outside the bridge anti-collision guardrail 10 where the cutting seam is required. The connecting rod 413303 connects the bottoms of the two guide rails 301, which can prevent the guide rail 301 from deforming when subjected to the pressure of the cutting mechanism or external forces, and ensure the parallel relationship between the guide rails 301. The pulley 304 is fixed to the connecting rod 413303. During the movement of the cutting mechanism, the pulley 304 bears the weight of the cutting mechanism and disperses it to the connecting rod 413303 and the guide rail 301. At the same time, the friction is reduced by rolling, so that the cutting mechanism can move smoothly on the guide rail 301.

[0037] Refer to Figures 3-4, the slitting mechanism 40 includes a sliding member and a cutting member. The sliding member includes a first rod 411, a second rod 412, a connecting rod 413303, and a sliding wheel 414. The first rod 411 and the second rod 412 are arranged parallel to each other from top to bottom along the length direction of the guide rail 301 between two parallel guide rails 301. The connecting rod 413303 is connected between the first rod 411 and the second rod 412. The sliding wheels 414 are arranged on the first rod 411 and the second rod 412, and multiple sliding wheels 414 are all slidably connected to the corresponding guide rails 301. The cutting member is arranged on the first rod 411 and the second rod 412. Among them, the first rod 411 and the second rod 412 can be made of metal materials, such as aluminum alloy materials; the sliding wheels 414 are arranged on the first rod 411 and the second rod 412 and are slidably connected to the corresponding guide rails 301. Since the guide rails 301 provide a track for restricting the movement direction for the sliding wheels 414, when an external force is applied to push or pull the sliding member, the sliding wheels 414 roll in the guide rails 301, driving the entire sliding member to move along the length direction of the guide rails 301; the cutting member is installed on the first rod 411 and the second rod 412. During the process of the sliding member moving along the guide rails 301, the rotating cutting tool contacts the surface of the bridge anti-collision guardrail 10 and generates a cutting effect.

[0038] Refer to Figure 5, the cutting member includes a bearing 402, an L-shaped connecting rod 401, a spring 403, a circular saw 404, a base 405 and a limiting circular plate 406. The bearing 402 is rotatably connected to the second rod 412, and the corner of the L-shaped connecting rod 401 is fixed to the bearing 402. The spring 403 is connected between one end of the L-shaped connecting rod 401 and the first rod 411. The base 405 is fixed to the other end of the L-shaped connecting rod 401. The circular saw 404 is fixed to the base 405. The limiting circular plate 406 is installed on the circular saw 404 and is concentrically arranged with the saw blade. The limiting circular plate 406 can contact the concrete surface of the guardrail to control the cutting depth. One end of the spring 403 in the tensile state is fixed to the first rod 411, and the other end pulls the L-shaped connecting rod 401 to rotate around the bearing 402 so that the circular saw 404 presses tightly against the anti-collision guardrail 10. When the circular saw 404 cuts the anti-collision guardrail 10, as the cutting progresses, the saw blade gradually cuts into the concrete. However, due to the presence of the limiting circular plate 406, when the limiting circular plate 406 contacts the concrete surface, it limits the further cutting depth of the saw blade, thereby realizing the control of the cutting depth. The spring 403 is in the tensile state, one end is fixed to the first rod 411, and the other end pulls the L-shaped connecting rod 401 to rotate around the bearing 402. According to the tensile characteristics of the spring 403, a continuous tensile force will be generated. This tensile force acts on the L-shaped connecting rod 401, causing the L-shaped connecting rod 401 to rotate around the bearing 402, thereby driving the circular saw 404 on the base 405 to press tightly against the anti-collision guardrail 10. This pressing force helps to ensure the close contact between the circular saw 404 and the surface of the anti-collision guardrail 10 during the cutting process, improving the cutting efficiency and cutting quality.

[0039] Refer to Figures 3-4, the traction mechanism 50 includes a first traction rope 501 and a second traction rope 502. One end of the first traction rope 501 is tied to the second rod 412, then bypasses the pulley 304 and extends to the top of the anti-collision guardrail 10, for pulling the sliding member to move within the guide rail 301; one end of the second traction rope 502 is tied to the first rod 411, and the other end also extends to the top of the anti-collision guardrail 10, for lifting the cutting mechanism that has completed the slot cutting operation to the top of the anti-collision guardrail 10. When it is necessary to pull the sliding member to move within the guide rail 301 for slot cutting operation, the operator pulls the first traction rope 501 on the top of the anti-collision guardrail 10. Since the first traction rope 501 is tied to the second rod 412 and bypasses the pulley 304 to change the direction of the force, the pulling force applied by the operator can be converted into the force to push the sliding member to move within the guide rail 301. During the pulling process, the operator should control the magnitude of the pulling force and the rhythm of the pulling according to the speed requirement of the slot cutting and the accuracy of the cutting. After the slot cutting operation is completed, the operator uses the second traction rope 502 to lift the cutting mechanism to the top of the anti-collision guardrail 10. By pulling the second traction rope 502 on the top of the anti-collision guardrail 10, since it is tied to the first rod 411, the pulling force of the second traction rope 502 can overcome the gravity of the cutting mechanism and lift the cutting mechanism upward. During the lifting process, attention should be paid to keeping the balance of the cutting mechanism to avoid tilting or colliding with other components.

[0040] The inner wall of the guide rail 301 is provided with a wear-resistant coating, and a ceramic matrix composite coating material can be selected. This material has the characteristics of high hardness and high wear resistance; a fluoropolymer coating can also be used, which has a low friction coefficient and good wear resistance to reduce the wear of the rollers of the moving base 407.

[0041] A flexible protective layer is provided at the edge of the limiting circular plate 406, and rubber material or soft plastic material can be selected. The rubber material has good elasticity and wear resistance, and can effectively prevent scratching. Soft plastic materials such as polyurethane have good flexibility and wear resistance, and can prevent scratching the concrete surface of the guardrail during the slot cutting process. During the installation process, it is necessary to ensure that there is no gap between the protective layer and the edge of the limiting circular plate 406 to prevent concrete from entering between the protective layer and the limiting circular plate 406 during the slot cutting process and affecting the protection effect.

[0042] The first traction rope 501 and the second traction rope 502 are high-strength nylon ropes. For the first traction rope 501, one end is firmly tied to the second rod 412. After bypassing the pulley 304, a suitable fixing device (such as a hook or an anchoring point) is set on the top of the anti-collision guardrail 10, and the other end of the first traction rope 501 is fixed on it; one end of the second traction rope 502 is tied to the first rod 411, and the other end extends to the top of the anti-collision guardrail 10 and a fixing device is set to ensure that the second traction rope 502 can stably play the role of lifting the cutting mechanism. During the installation process, attention should be paid to the running direction of the traction rope to avoid interference or friction with other components.

[0043] The rollers of the mobile gantry 20 are equipped with a braking device, which can fix the position of the mobile gantry 20 during the operation of the device. The braking device of the rollers of the mobile gantry 20 can adopt a mechanical friction braking structure. Braking blocks are arranged on one side or both sides of each roller. The braking blocks are connected to the braking operating rod through a linkage mechanism. The material of the braking blocks can be selected from wear-resistant metal materials or composite materials with a high friction coefficient. When the device is operating, the operator operates the braking operating rod to make the braking blocks closely contact the rollers, generating frictional force to fix the position of the mobile gantry 20. The braking operating rod can be set at a position near the mobile gantry 20 for easy operation and can be designed into a locking structure. Once the braking operating rod is in the braking position, it can be locked to prevent the braking device from loosening accidentally during the operation.

[0044] Refer to Figures 1-6 , the usage method of the cutting device for the aerial side of the bridge anti-collision guardrail 10 provided by the present invention includes the following steps:

[0045] S1. Pre-cutting seam 101 step: Pre-cut pre-cutting seams 101 with a length of about 5 cm at a certain spacing and depth on the top of the anti-collision guardrail 10 in advance;

[0046] S2. Installation step: Push the mobile gantry 20 to the position of the pre-cutting seam 101, install the guide rail 301 mechanism 30 on the cross beam of the mobile gantry 20, and assemble and install the cutting mechanism 40 on the guide rail 301 mechanism 30;

[0047] S3. Adjustment step: Adjust the mobile gantry 20 again to make the saw blade of the circular saw 404 stuck in the pre-cutting seam 101, make the spring 403 in a stretched state, and press the circular saw 404 tightly against the anti-collision guardrail 10;

[0048] S4. Cutting seam step: Pull the traction rope 1 501 to drive the circular saw 404 to slowly cut downwards. During the cutting operation, the spring 403 always remains in a stretched state, and the circular saw 404 is always pressed tightly against the anti-collision guardrail 10;

[0049] S5. Lifting step: After the cutting is completed, pull the traction rope 2 502 to lift the cutting mechanism to the top of the guardrail;

[0050] S6. Repetition step: Push the mobile gantry 20 to the next pre-cutting seam 101, and repeat the adjustment step, cutting seam step and lifting step until all cutting work is completed.

[0051] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all the equivalent substitutions and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A slitting device for the airside of a bridge anti-collision guardrail, characterized in that: include: A moving mechanism, a guide rail mechanism, a cutting mechanism and a traction mechanism; the moving mechanism is used to move the device to the bridge anti-collision guardrail where slitting is required, and the guide rail mechanism is installed on one side of the moving mechanism; the guide rail mechanism is used to guide the cutting mechanism; the cutting mechanism is installed on the guide rail mechanism and is used to slit the bridge anti-collision guardrail; the traction mechanism is arranged on the cutting mechanism and is used to adjust the height position of the cutting mechanism.

2. The slitting device for the airside of a bridge anti-collision guardrail according to claim 1 is characterized in that: The moving mechanism comprises a moving platform and four groups of rollers arranged at the bottom of the moving platform, so that the moving platform can move along the bridge deck.

3. The slitting device for the airside of a bridge anti-collision guardrail according to claim 1, characterized in that: The guide rail mechanism includes two parallel guide rails, a connecting plate, a connecting rod and a pulley. The connecting plate is fixedly connected to the top of the two guide rails for fixing on the moving mechanism. The two ends of the connecting rod are respectively connected to the bottom of the two guide rails, and the pulley is fixed on the connecting rod.

4. The slitting device for the airside of a bridge anti-collision guardrail according to claim 3 is characterized in that: The slitting mechanism includes a sliding member and a cutting member, and the sliding member includes a first rod, a second rod, a connecting rod and a sliding wheel. The first rod and the second rod are arranged in parallel between two parallel guide rails from top to bottom along the length direction of the guide rail. The connecting rod is connected between the first rod and the second rod. The sliding wheel is arranged on the first rod and the second rod, and multiple sliding wheels are slidably connected in the corresponding guide rails. The cutting member is arranged on the first rod and the second rod.

5. The slitting device for the airside of a bridge anti-collision guardrail according to claim 4, characterized in that: The cutting member includes a bearing, an L-shaped connecting rod, a spring, a circular saw, a base and a limiting circular plate. The bearing is rotatably connected to the second rod, the corner of the L-shaped connecting rod is fixed to the bearing, the spring is connected between one end of the L-shaped connecting rod and the first rod, the base is fixed to the other end of the L-shaped connecting rod, the circular saw is fixed to the base, the limiting circular plate is installed on the circular saw and arranged concentrically with the saw blade, and the limiting circular plate can contact the concrete surface of the guardrail to control the cutting depth; one end of the spring in a stretched state is fixed to the first rod, and the other end pulls the L-shaped connecting rod to rotate around the bearing to press the circular saw against the anti-collision guardrail.

6. The slitting device for the airside of a bridge anti-collision guardrail according to claim 5, characterized in that: The traction mechanism includes traction rope 1 and traction rope 2, one end of traction rope 1 is tied to the second rod, then passes over the pulley and extends to the top of the anti-collision guardrail, and is used to pull the sliding member to move in the guide rail; one end of traction rope 2 is tied to the first rod, and the other end also extends to the top of the anti-collision guardrail, and is used to lift the cutting mechanism that completes the slitting operation to the top of the anti-collision guardrail.

7. The slitting device for the airside of a bridge anti-collision guardrail according to claim 5, characterized in that: A flexible protective layer is provided at the edge of the limiting circular plate to prevent the concrete surface of the guardrail from being scratched during the cutting process.

8. The slitting device for the airside of a bridge anti-collision guardrail according to claim 6, characterized in that: The traction rope 1 and the traction rope 2 are high-strength nylon ropes.

9. The slitting device for the airside of a bridge anti-collision guardrail according to claim 3, characterized in that: The inner wall of the guide rail is provided with a wear-resistant coating.

10. A method for using the slitting device for the airside of a bridge anti-collision guardrail as claimed in claim 5, characterized in that: The following steps are involved: S1. Pre-cutting step: pre-cutting a certain length of pre-cutting at a certain spacing and depth on the top of the anti-collision guardrail in advance; S2, cleaning and installation steps: push the moving mechanism to the pre-slit position, install the guide rail mechanism on the moving stand, assemble the slit mechanism and install it on the guide rail mechanism; S3, adjustment steps: adjust the moving mechanism again so that the circular saw blade is stuck in the pre-cut slit, so that the spring is in a stretched state, and the circular saw is pressed against the anti-collision guardrail; S4, cutting step: pull the traction rope to drive the circular saw to slowly cut downwards, during the cutting process, the spring is always in a stretched state, and the circular saw is always pressed against the anti-collision guardrail; S5, lifting step: after the slitting is completed, pull the traction rope 2 to lift the cutting mechanism to the top of the guardrail; S6, repeating steps: pushing the moving mechanism to the next pre-cutting slit, repeating the adjusting step, the slitting step and the lifting step until all the slitting work is completed.

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