A precast bridge deck panel reverse cutting demolition apparatus and method of use

Abstract

The present application relates to the field of bridge demolition, disclose a kind of prefabricated bridge deck slab reverse cutting equipment and method for dismantling, including mounting frame, the mounting frame is equipped with lifting mechanism, the lifting mechanism is installed with cutting table, the cutting table is installed with cutting mechanism and drive box, the drive box is used to drive the cutting mechanism operation.The present application is cut by cutting equipment and lifting mechanism cooperation, then according to the sequence of transverse cutting seam and longitudinal cutting seam in turn to bridge deck slab cutting, using driving motor to drive gear rotation, gear rubs first ring and second layer sector plate rotation circumferential rotation, just the gap left by first layer sector plate is filled, so that two sector plates form a whole when using, the waste residue splashed in cutting process is uniformly shielded, to prevent the waste residue after cutting directly splashing and falling into river, cause subsequent processing problem.

Description

Technical Field

[0001] This invention relates to the field of bridge demolition, specifically to a device and method for reverse cutting and demolishing precast bridge decks. Background Technology

[0002] After a bridge has reached a certain service life, its overall load-bearing capacity may decrease due to various reasons, turning it into a dangerous bridge. Since repair and maintenance cannot solve the problem of reduced load-bearing capacity, the general solution is to demolish the entire bridge.

[0003] For bridges with prefabricated panels installed on the bridge deck, there are some problems. For example, since the bridge decks of the old bridges on both sides are prefabricated components, there is no connection between adjacent blocks. They are formed as a whole only by the bridge deck pavement layer, and the pavement layer is not easy to peel off from the bridge deck. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for reverse cutting and dismantling precast bridge decks, thereby solving the above-mentioned technical problems.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A device for reverse cutting and dismantling precast bridge decks includes: a mounting frame, a lifting mechanism mounted on the mounting frame, a cutting table mounted on the lifting mechanism, the lifting mechanism driving the cutting table to move up and down, a cutting mechanism and a drive box mounted on the cutting table, and the drive box driving the cutting mechanism to operate.

[0007] As a further technical solution, the lifting mechanism includes: two lead screws, which are rotatably mounted on the mounting frame; two sliding columns are fixedly mounted on the mounting frame; a sliding table is sleeved on the lead screw and sliding column on the same side; the sliding table is helically connected to the corresponding lead screw; a servo motor is mounted on the mounting frame; the servo motor is drively connected to the lead screw; and the cutting table is detachably and fixedly mounted on the two sliding tables.

[0008] As a further technical solution, the cutting mechanism includes: a protective shell, which is fixedly installed on the surface of the cutting table, a vertical groove is provided on one side of the protective shell, a slider is slidably connected in the vertical groove, the cutting blade is rotatably connected to the slider through a rotating shaft, a drive box is fixedly installed on the slider, and one end of the rotating shaft passes through the slider and is connected to the drive box for transmission.

[0009] A telescopic assembly is used to push the slider and the drive box to move up and down along the vertical groove.

[0010] As a further technical solution, guide blocks are fixedly connected to both sides of the protective shell, the two ends of the guide blocks are rounded, and multiple freely rotating rollers are embedded on the side of the guide blocks. Protective plates are provided on the two inner sidewalls of the protective shell, and the thickness of the protective plates gradually decreases from the outside to the inside.

[0011] As a further technical solution, a water pipe bracket is also installed on one side of the cutting table. A water spray nozzle is detachably fixed on the water pipe bracket. The water spray nozzle is connected to a flexible water pipe, which is connected to an external water pump. The water pump is used to supply cooling water.

[0012] As a further technical solution, a shielding mechanism is installed on the cutting table, which is used to shield the debris splashed during cutting.

[0013] As a further technical solution, the shielding mechanism includes multiple sector plates, which are divided into two layers. The ends of the sector plates in the first layer are fixedly mounted on the cutting table, and the ends of the sector plates in the second layer are fixedly connected to the first ring. A second ring is also provided at the lower part of the cutting table. Both the first ring and the second ring are mounted on the cutting table through a positioning frame. Multiple automatic telescopic rods are sleeved and connected on the second ring. The automatic telescopic rods are arranged one-to-one with the sector plates in the second layer, and the telescopic ends of the automatic telescopic rods are movably connected to the lower surface of the corresponding sector plate.

[0014] The inner side of the first ring is provided with teeth, which mesh with the gear, and the gear is connected to a drive motor mounted on the cutting table.

[0015] As a further technical solution, an elastic scraper is fixedly provided on one side end of the fan-shaped plate of the first layer.

[0016] A method for using equipment for reverse cutting and demolition of precast bridge decks, comprising the following steps:

[0017] S1: Based on the position of the bridge arch rib, lay out and mark the position of the bridge panel joint on the bridge deck, draw the position of the cutting hole and the hoisting hole, use a core drill to take the hole, and check the position of the panel joint according to the hole taking. After confirming that there is no error, draw the longitudinal and transverse cutting lines.

[0018] S2: Use the equipment's cutting mechanism to cut a transverse slit along the transverse cutting line;

[0019] S3: Once the hoisting chain is inserted into the hoisting hole, the installation is complete. Then, the cutting mechanism of the equipment is used to cut the longitudinal seam, and the precast bridge panel is cut. The precast bridge panel is then hoisted by a crane and transported to the disposal site by a light transport vehicle.

[0020] The beneficial effects of this invention are:

[0021] (1) By setting up a protective shell, the present invention can, on the one hand, contain the cutting blade inside the protective shell when it is idle, preventing the safety hazards caused by the cutting blade being exposed, and on the other hand, actively protect the cutting blade to prevent accidental damage to the cutting blade. Furthermore, it can cut the pavement layer and the precast bridge panel together, thereby eliminating the need for a separate glassing process for the pavement layer, which is convenient and quick.

[0022] (2) In order to prevent the waste residue from entering the protective shell and causing the cutting blade to be unable to return to the protective shell, the present invention provides a protective plate. The protective plate is thick on the outside and thin on the inside, so that the upper side of the protective plate is always in contact with the cutting blade, thereby preventing large particles of waste residue from splashing into the interior during cutting. Furthermore, a guide block is provided on the top side of the protective shell, so that the front and rear positions of the cutting blade are detected in advance during the cutting process, preventing the cutting blade from being damaged by direct contact with obstacles.

[0023] (3) The present invention adds a shielding mechanism to uniformly shield the waste residue that falls during the cutting process, preventing the waste residue after cutting from falling directly into the river and causing subsequent treatment problems; specifically, when the cutting mechanism is working, the drive motor rotates to drive the gear to rotate, and the gear meshes with the teeth to drive the entire first ring to rotate circumferentially, thereby driving the second layer of fan-shaped plates fixed on the first ring to rotate, which fills the gap left by the first layer of fan-shaped plates, so that the two layers of fan-shaped plates form a whole when in use, and shield the waste residue. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the hoisting of the precast bridge panel in this invention;

[0026] Figure 2 This is a schematic diagram illustrating the operation of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 4 for Figure 3 A three-dimensional structural diagram from another perspective;

[0029] Figure 5 This is a three-dimensional schematic diagram of the present invention with the protective shell removed;

[0030] Figure 6 for Figure 5 A three-dimensional structural diagram from another angle;

[0031] Figure 7This is a schematic diagram of the structure of the sector plate located in the second layer of the present invention.

[0032] Figure Descriptions: 1. Mounting bracket; 2. Lifting mechanism; 21. Lead screw; 22. Sliding column; 23. Slide table; 24. Servo motor; 3. Cutting table; 4. Cutting mechanism; 41. Protective shell; 42. Vertical groove; 43. Slider; 44. Cutting blade; 45. Rotating shaft; 46. Telescopic assembly; 47. Guide block; 48. Roller; 49. Protective plate; 5. Water pipe bracket; 6. Spray nozzle; 7. Flexible water pipe; 8. Shielding mechanism; 81. Fan-shaped plate; 82. First ring; 83. Second ring; 84. Positioning frame; 85. Automatic telescopic rod; 86. Tooth; 87. Gear; 88. Drive motor; 89. Elastic scraper; 9. Drive box. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-7 As shown, the present invention is a device for reverse cutting and dismantling of precast bridge decks;

[0035] Example 1:

[0036] The device includes a mounting frame 1, on which a lifting mechanism 2 is provided, and a cutting table 3 is mounted on the lifting mechanism 2. The lifting mechanism 2 is used to drive the cutting table 3 to move up and down. A cutting mechanism 4 and a drive box 9 are mounted on the cutting table 3. The drive box 9 is used to drive the cutting mechanism 4 to operate.

[0037] The lifting mechanism 2 includes: two lead screws 21, which are rotatably mounted on the mounting frame 1. Two sliding columns 22 are fixedly mounted on the mounting frame 1. A sliding table 23 is sleeved on the lead screws 21 and sliding columns 22 on the same side. The sliding table 23 is helically connected to the corresponding lead screw 21. A servo motor 24 is mounted on the mounting frame 1 and is drivenly connected to the lead screws 21. The cutting table 3 is detachably and fixedly mounted on the two sliding tables 23.

[0038] The cutting mechanism 4 includes: a protective shell 41, which is fixedly installed on the upper surface of the cutting table 3. A vertical groove 42 is provided on one side of the protective shell 41. A slider 43 is slidably connected in the vertical groove 42. The cutting blade 44 is rotatably connected to the slider 43 through a rotating shaft 45. The drive box 9 is fixedly installed on the slider 43. The rotating shaft 45 passes through one end of the slider 43 and is connected to the drive box 9 for transmission.

[0039] Telescopic component 46 is used to push the slider 43 and the drive box 9 to move up and down along the vertical groove 42; the telescopic component 46 can be an electric, hydraulic or pneumatic telescopic rod, one end of the telescopic rod is fixed on the cutting table 3, and the other end is rotatably connected to the slider 43;

[0040] In this embodiment, the present invention is detachably and fixedly installed on an existing mobile platform vehicle. After the lifting mechanism 2 aligns the cutting blade 44 with the cutting seam, the cutting mechanism 4 is started and the prefabricated panel is cut sequentially along the cutting seam.

[0041] Specifically, the servo motor 24 drives one of the lead screws 21 to rotate. The two lead screws 21 rotate synchronously through a chain drive, as is done in the prior art. The lead screw 21 and the slide table 23 are screwed together, which drives the slider 43 to rise and fall. As a result, the cutting table 3 rises and falls accordingly. When the protective shell 41 is roughly aligned with the cutting seam, the telescopic component 46 is activated to push the slider 43 and the drive box 9, so that the cutting blade 44, which was originally inside the protective shell 41, extends roughly out of the protective shell 41. This makes it easier to observe the accurate alignment of the cutting blade 44 with the cutting seam until the cutting blade 44 on the cutting table 3 is aligned with the cutting seam. The servo motor 24 stops rotating, and the drive box 9 drives the cutting blade 44 to rotate. At the same time, the telescopic component 46 gradually pushes the upper slider 43 and the drive box 9 to move, so that the cutting blade 44 extends into the cutting seam. Then, the moving platform vehicle realizes the lateral or longitudinal displacement of the present invention to realize the lateral cutting seam or longitudinal cutting of the bridge deck. When it encounters a rib, the lifting mechanism 2 works, which drives the entire cutting table 3 to move. After avoiding the bridge rib, it returns to the initial position. The above actions are repeated to complete the cutting action.

[0042] By setting up the protective shell 41, on the one hand, the cutting blade 44 is contained inside the protective shell 41 when it is not in use, preventing the safety hazards caused by the cutting blade 44 being exposed to the outside. On the other hand, it can also actively protect the cutting blade 44 to prevent accidental damage to the cutting blade 44.

[0043] Guide blocks 47 are fixedly connected to both sides of the protective shell 41. The two ends of the guide blocks 47 are rounded. Multiple freely rotating rollers 48 are embedded on the side of the guide blocks 47. Protective plates 49 are provided on the two inner side walls of the protective shell 41. The thickness of the protective plates 49 gradually decreases from the outside to the inside. A water pipe bracket 5 is also installed on one side of the cutting table 3. A water nozzle 6 is detachably fixed on the water pipe bracket 5. The water nozzle 6 is connected to a flexible water pipe 7. The flexible water pipe 7 is connected to an external water pump. The water pump is used to supply cooling water. In this embodiment, to prevent the cutting waste from entering the protective shell 41 and causing the cutting blade 44 to be unable to return to the protective shell 41, a protective plate 49 is provided. The protective plate 49 is thicker on the outside and thinner on the inside, so that the upper side of the protective plate 49 is always in contact with the cutting blade 44, thereby preventing large particles of waste from entering the interior during cutting. Furthermore, a guide block 47 is provided on the top side of the protective shell 41, so that the front and rear positions of the cutting blade 44 are detected in advance during the cutting process, preventing the cutting blade 44 from encountering obstacles during the displacement process and causing damage to the cutting blade.

[0044] At the same time, during the cutting process, a water pump is used to supply water to the flexible water pipe 7 and pressurize it from the spray nozzle 6 to cool and flush the cutting position of the cutting blade 44, preventing the cutting blade 44 from overheating and being damaged over a long period of time.

[0045] Example 2:

[0046] A shielding mechanism 8 is installed on the cutting table 3. The shielding mechanism 8 is used to shield the debris splashed during cutting. The shielding mechanism 8 includes a plurality of fan-shaped plates 81. The fan-shaped plates 81 are divided into two layers. The ends of the fan-shaped plates 81 in the first layer are fixedly set on the cutting table 3. The ends of the fan-shaped plates 81 in the second layer are fixedly connected to the first ring 82. A second ring 83 is also provided at the lower part of the cutting table 3. The first ring 82 and the second ring 83 are both installed on the cutting table 3 through a positioning frame 84. A plurality of automatic telescopic rods 85 are sleeved and connected on the second ring 83. The automatic telescopic rods 85 are arranged one-to-one with the fan-shaped plates 81 in the second layer. The telescopic ends of the automatic telescopic rods 85 are movably connected to the lower surface of the corresponding fan-shaped plate 81.

[0047] The first ring 82 has a toothed part 86 on its inner side, which meshes with the gear 87. The gear 87 is connected to the drive motor 88 mounted on the cutting table 3. An elastic scraper 89 is fixedly provided on one side end of the fan-shaped plate 81 of the first layer.

[0048] In this embodiment, a shielding mechanism 8 is added to uniformly shield the waste splattered during the cutting process, preventing the waste from splashing everywhere and falling directly into the river, causing subsequent treatment problems. Specifically, when the cutting mechanism 4 is working, the drive motor 88 rotates to drive the gear 87 to rotate. The gear 87 meshes with the teeth 86, thereby rotating the entire first ring 82 circumferentially. This causes the second layer of sector plates 81, which are fixed on the first ring 82, to rotate, filling the gap left by the first layer of sector plates 81. This makes the two layers of sector plates 81 form a whole when in use, shielding the waste. An automatic telescopic rod 85 is set to support the sector plates 81 located on the second layer, enhancing the structural strength of the second layer of sector plates 81. At the same time, the automatic telescopic rod 85 can move with the sector plates 81.

[0049] In the non-working state, the drive motor 88 drives the gear 87 to rotate in the reverse direction, causing the first ring 82 and the second layer of fan-shaped plates 81 to return to their initial positions, allowing the two layers of fan-shaped plates to intersect. During the intersecting rotation, the elastic scraper 89 set on the bottom surface of the first layer of fan-shaped plates 81 cleans the surface of the second layer of fan-shaped plates 81, thereby pushing the waste away from the gradually forming gap. In addition, the upper surface of the first layer of fan-shaped plates 81 can be set to be high in the middle and low on both sides, so that the waste blocked during cutting can automatically flow from the first layer of fan-shaped plates 81 to the second layer of fan-shaped plates 81, eliminating the need for subsequent separate cleaning of the waste on the first layer of fan-shaped plates 81, which is convenient and quick. The outer edge of the fan-shaped plates 81 can also be set to be an arc-shaped flange to block splashed debris.

[0050] A method for using equipment for reverse cutting and demolition of precast bridge decks, comprising the following steps:

[0051] S1: Based on the position of the bridge arch rib, lay out and mark the position of the bridge panel joint on the bridge deck, draw the position of the cutting hole and the hoisting hole, use a core drill to take the hole, and check the position of the panel joint according to the hole taking. After confirming that there is no error, draw the longitudinal and transverse cutting lines.

[0052] S2: Use the cutting mechanism 4 of the equipment to cut a horizontal slit along the horizontal cutting line;

[0053] S3: Once the hoisting chain is inserted into the hoisting hole, the installation is complete. Then, the cutting mechanism 4 of the equipment is used to cut the longitudinal seam, and the precast bridge panel is cut. The precast bridge panel is then hoisted by a crane and transported to the disposal site by a light transport vehicle.

[0054] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A device for reverse cutting and dismantling precast bridge decks, characterized in that, include: Mounting frame (1), the mounting frame (1) is provided with a lifting mechanism (2), the lifting mechanism (2) is provided with a cutting table (3), the lifting mechanism (2) is used to drive the cutting table (3) to move up and down, the cutting table (3) is provided with a cutting mechanism (4) and a drive box (9), the drive box (9) is used to drive the cutting mechanism (4) to operate; The cutting mechanism (4) includes: a protective shell (41), which is fixedly installed on the upper surface of the cutting table (3). A vertical groove (42) is provided on one side of the protective shell (41). A slider (43) is slidably connected in the vertical groove (42). The cutting blade (44) is rotatably connected to the slider (43) through a rotating shaft (45). The drive box (9) is fixedly installed on the slider (43). The rotating shaft (45) passes through one end of the slider (43) and is connected to the drive box (9) in a transmission connection. Telescopic assembly (46) for pushing the slider (43) and the drive box (9) up and down along the vertical groove (42); The cutting table (3) is equipped with a shielding mechanism (8), which is used to shield the slag and soil that splashes during cutting; The shielding mechanism (8) includes multiple fan-shaped plates (81). The fan-shaped plates (81) are divided into two layers. The ends of the fan-shaped plates (81) of the first layer are fixedly mounted on the cutting table (3). The ends of the fan-shaped plates (81) of the second layer are fixedly connected to the first ring (82). The lower part of the cutting table (3) is also provided with a second ring (83). The first ring (82) and the second ring (83) are both mounted on the cutting table (3) through a positioning frame (84). Multiple automatic telescopic rods (85) are sleeved and connected on the second ring (83). The automatic telescopic rods (85) are arranged one-to-one with the fan-shaped plates (81) of the second layer. The telescopic ends of the automatic telescopic rods (85) are movably connected to the lower surface of the corresponding fan-shaped plate (81). The first ring (82) has a toothed part (86) on its inner side, which meshes with a gear (87), and the gear (87) is connected to a drive motor (88) mounted on the cutting table (3).

2. The equipment for reverse cutting and dismantling precast bridge decks according to claim 1, characterized in that, The lifting mechanism (2) includes: two lead screws (21), which are rotatably mounted on the mounting frame (1). Two sliding columns (22) are fixedly mounted on the mounting frame (1). A sliding table (23) is sleeved on the lead screw (21) and the sliding column (22) on the same side. The sliding table (23) is helically connected to the corresponding lead screw (21). A servo motor (24) is mounted on the mounting frame (1). The servo motor (24) is connected to the lead screw (21) in a transmission manner. The cutting table (3) is detachably and fixedly mounted on the two sliding tables (23).

3. The equipment for reverse cutting and dismantling precast bridge decks according to claim 1, characterized in that, The protective shell (41) is fixedly connected to guide blocks (47) on both sides. The two ends of the guide blocks (47) are rounded. Multiple rollers (48) that can rotate freely are embedded on the side facing the guide blocks (47). Protective plates (49) are provided on the two inner side walls of the protective shell (41). The thickness of the protective plates (49) gradually decreases from the outside to the inside.

4. The equipment for reverse cutting and dismantling precast bridge decks according to claim 1, characterized in that, A water pipe bracket (5) is also installed on one side of the cutting table (3). A water spray nozzle (6) is detachably fixed on the water pipe bracket (5). The water spray nozzle (6) is connected to a flexible water pipe (7). The flexible water pipe (7) is connected to an external water pump. The water pump is used to supply cooling water.

5. The equipment for reverse cutting and dismantling precast bridge decks according to claim 1, characterized in that, An elastic scraper (89) is fixedly provided on one side end of the fan-shaped plate (81) of the first layer.

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