Bracket type lower cross beam supporting system, laser cutting device and construction method

Abstract

The invention discloses a bracket type lower cross beam supporting system, a laser cutting device and a construction method, and relates to the technical field of bridge construction. The bracket type lower cross beam supporting system comprises a cross beam support, a distribution beam and a supporting bracket. The distribution beam comprises I-shaped steel; an insertion hole is formed in a lower transverse plate of the I-shaped steel; the cushion blocks are arranged between the I-shaped steel and the supporting brackets and can be replaced. The top surface of the cushion block is detachably connected with the I-shaped steel through the oblique insertion bolt, so that temperature change caused by welding, flame cutting and the like is avoided, and the problem of I-shaped steel deformation is further avoided; meanwhile, the bracket type lower cross beam supporting system further comprises an antifriction plate, after the first C-shaped part and the second C-shaped part of the antifriction plate are cut off, the first transverse part and the second transverse part slide relatively through a lubricant, and the third transverse part and the fourth transverse part slide relatively through the lubricant, so that the resistance generated when the cushion block is pulled out transversely is reduced, and the service life of the cushion block is prolonged. And the problem that a cushion block moving gap is lacked due to the fact that flame cutting is not carried out is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a corbel-type lower crossbeam support system, a laser cutting device and a construction method. Background Art

[0002] The cable-stayed bridge, also known as the cable-stayed bridge, is one of the commonly used bridge systems.

[0003] The cast-in-place support for a cable-stayed bridge supports the main beam. The support consists of an H-shaped lower crossbeam and upright columns. During the casting process, the upright columns are typically cast first, followed by the lower crossbeam. To provide temporary support for the lower crossbeam casting mold and the partially hardened lower crossbeam, a corbel-type lower crossbeam support system is required. This system consists of a distribution beam assembled from I-beams and supporting corbels.

[0004] Traditionally, spacers are placed between the supporting corbel and the I-beam. These spacers are welded to the underside of the I-beam's lower crossbeam. Once the lower crossbeam has hardened, the spacers are removed using flame cutting to lower the corbel-style lower crossbeam support system. Once welded to the spacers, the I-beam is prevented from moving horizontally, improving structural stability.

[0005] However, the I-beams are used in different bridge sections, and frequent welding, cutting and cooling can cause the bottom surface of the I-beams to deform, which in turn reduces the stability of the pads or causes pressure concentration and deformation. Summary of the Invention

[0006] In order to overcome the problem in the above background technology that "the lower cross plate of the I-beam will be deformed due to frequent welding, cutting and cooling", the present invention provides a corbel-type lower cross beam support system, a laser cutting device and a construction method.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: The support system of the lower crossbeam of the corbel type includes a crossbeam bracket for supporting the lower crossbeam, a distribution beam for supporting the crossbeam bracket and a support corbel arranged under the distribution beam; the support corbel is connected to the vertical support column at the end of the lower crossbeam; the distribution beam includes two I-beams fixedly connected in a II shape; the lower cross plate of the I-beam is provided with a plug hole; the plug hole includes a circular hole and a strip hole; it also includes a replaceable pad provided between the I-beam and the support corbel; the top surface of the pad is detachably connected to the I-beam by an oblique bolt inserted in the circular hole, and the bottom surface is detachably connected to the support corbel by a first bolt; it also includes a friction reducing plate with a bent plate structure; the friction reducing plate includes a first upright portion, a first A transverse portion, a first C-shaped portion, a second transverse portion, a second upright portion, a third transverse portion, a second C-shaped portion and a fourth transverse portion; the first transverse portion and the second transverse portion can both be placed between the lower transverse plate and the cushion block, and the bottom surface of the first transverse portion and the top surface of the second transverse portion fit together; the third transverse portion and the fourth transverse portion can both be arranged between the cushion block and the supporting corbel, and the bottom surface of the third transverse portion and the top surface of the fourth transverse portion fit together; a first cavity is provided on the inner side of the first C-shaped portion, and a second cavity is provided on the inner side of the second C-shaped portion; a detachable transverse plug-in is laterally inserted into the middle part of the distribution beam; the first upright portion is inserted into the strip hole, and the end of the transverse plug-in is inserted into the hanging hole on the upper part of the first upright portion.

[0008] As a further optimization solution of the present invention, the cushion block includes a first cushion block and a second cushion block, and the height of the first cushion block is higher than that of the second cushion block.

[0009] As a further optimization scheme of the present invention, after the first C-shaped portion is cut off, the first cavity is used to guide the lubricant into the gap between the first transverse portion and the second transverse portion; after the second C-shaped portion is cut off, the second cavity is used to guide the lubricant into the gap between the third transverse portion and the fourth transverse portion.

[0010] The laser cutting device includes a laser cutting machine, which is used to cut the I-beam in the bullnose type lower crossbeam support system, and the laser cutting machine can cut the lower cross plate of the I-beam to form a socket; the laser cutting machine includes a bed, a drive assembly connected to the bed, and a laser emitter connected to the drive assembly; the bed is provided with a first processing cavity, and a plurality of vertical supporting tooth plates are provided at the bottom of the first processing cavity, and the supporting tooth plates are used to support the I-beam; two clamping plates that can move laterally are provided in the first processing cavity, and the two clamping plates can clamp the I-beam from both sides and form a closed cavity; the laser emitter can emit laser downward; the closed cavity is used to store metal dust generated when the laser cuts the lower cross plate.

[0011] As a further optimization solution of the present invention, a linear drive is laterally installed on the side wall of the first processing chamber, and the output shaft of the linear drive is connected to the clamping plate.

[0012] As a further optimization scheme of the present invention, the outer wall of the clamping plate is provided with a first groove, and the inner wall of the first processing cavity is provided with a first protrusion; when the clamping plate moves laterally to fit with the inner wall of the first processing cavity, the first groove is adapted to snap fit the first protrusion, and the first protrusion is used to longitudinally support the clamping plate.

[0013] As a further optimization solution of the present invention, a limiting ridge is provided at the end of the inner side wall of the clamping plate; the I-beam can slide laterally between the two clamping plates until the end face of the I-beam abuts against the limiting ridge.

[0014] As a further optimization scheme of the present invention, the laser cutting machine also includes an arc-shaped pad, which can be placed at one end of the bottom surface of the I-beam; the arc-shaped pad is used to raise one end of the I-beam to avoid the end face of the I-beam being stopped by the supporting tooth plate; a reserved through groove is provided between the two limiting ridges, and the reserved through groove is used to accommodate the arc-shaped pad.

[0015] As a further optimization scheme of the present invention, the driving assembly includes a first electric slide rail, a column, a second electric slide rail and a third electric slide rail; the first electric slide rail is connected to the bed body, the top and bottom ends of the column are respectively connected to the first electric slide rail and the second electric slide rail, the third electric slide rail is connected to the second electric slide rail, and the laser emitter is connected to the third electric slide rail; the first processing cavity is arranged at one end of the bed body, and a vertical hole is provided at the other end of the bed body; when the I-beam is loaded or unloaded, the laser emitter can be inserted into the vertical hole.

[0016] The construction method of the corbel-type lower crossbeam support system, that is, the steps of dismantling the corbel-type lower crossbeam support system include: S1, placing a jack between the distribution beam and the support corbel, and using the jack to support the distribution beam; S2, replacing the first pad originally installed between the distribution beam and the support corbel with the second pad; S3, lowering the jack until the distribution beam is pressed onto the second pad; then connecting the second pad to the distribution beam using the oblique bolt; S4, removing the jack; S5, dismantling the crossbeam support; S6, dismantling the distribution beam, the second pad, and the support corbel; Step S2 further includes the following steps: S21, removing the oblique bolt and the first bolt; S22, cutting off the first C-shaped portion and the second C-shaped portion to expose the first cavity and the second cavity; S23, filling the first cavity and the second cavity with lubricant respectively; S24, standing until the lubricant flows into the first transverse portion and the second transverse portion, and between the third transverse portion and the fourth transverse portion respectively; S25, horizontally pulling out the first pad, the second transverse portion and the third transverse portion; S26, pulling out the transverse plug and removing the first vertical portion and the first transverse portion; S27, removing the fourth transverse portion; S28, placing the second pad on the support corbel and fixing it with a first bolt.

[0017] In summary, the present invention has at least one of the following advantages: (1) In the bracket-type lower crossbeam support system, the pad and the I-beam are detachably connected using oblique bolts inserted into circular holes, which avoids temperature changes caused by welding, flame cutting and cooling, and thus avoids the problem of deformation of the lower cross plate of the I-beam.

[0018] (2) The bracket-type lower crossbeam support system also includes a friction-reducing plate in the form of a bent plate structure. The first and second transverse portions of the friction-reducing plate are placed between the I-beam and the pad, and the third and fourth transverse portions of the friction-reducing plate are placed between the pad and the supporting bracket. After the first C-shaped portion and the second C-shaped portion are cut off, the first and second transverse portions can slide relative to each other, and the third and fourth transverse portions can slide relative to each other, thereby reducing the friction force of the pad when it is pulled out laterally, reducing the difficulty of the operation, and avoiding the problem of lack of clearance for the pad due to the lack of flame cutting.

[0019] (3) After the first C-shaped portion and the second C-shaped portion are cut off, the first cavity and the second cavity are exposed; the user fills the first cavity and the second cavity with lubricant, and under the action of capillary force, part of the lubricant flows into the space between the first transverse portion and the second transverse portion, and the other part of the lubricant flows into the space between the third transverse portion and the fourth transverse portion, further reducing the friction force of the pad when it is pulled out laterally.

[0020] (4) Before the anti-friction plate leaves the factory, both ends of the first cavity and both ends of the second cavity are sealed. Then, after the anti-friction plate is installed and before the first C-shaped portion / second C-shaped portion is cut off, dust from the construction site cannot enter the first cavity and the second cavity, thereby preventing dust particles from being stuck between the first transverse portion and the second transverse portion, and between the third transverse portion and the fourth transverse portion, thereby reducing the sliding friction between the first transverse portion and the second transverse portion, and reducing the sliding friction between the third transverse portion and the fourth transverse portion.

[0021] (5) After the first pad, the second transverse portion and the third transverse portion are pulled out, the first transverse portion with lubricant adhered to the bottom surface can be hung on the bottom surface of the distribution beam without falling on the upper surface of the supporting corbel. Therefore, the lubricant will not adhere to the upper surface of the supporting corbel and the lower surface of the lower cross plate of the I-beam, thereby improving the cleanliness of the supporting corbel and the distribution beam during turnover use. The upper and lower working surfaces of the jack will not contact the lubricant, which can reduce the risk of the jack itself slipping during the process of supporting the distribution beam and improve construction safety.

[0022] (6) In the laser cutting device, a clamping plate is used to seal the side wall groove of the I-beam to form a closed cavity. The closed cavity is used to store the metal dust generated when the laser cuts the lower horizontal plate, thereby reducing the amount of metal dust diffused outward, thereby improving the cleanliness of the processing environment and reducing physical damage to the operator.

[0023] (7) When the clamping plate moves laterally to fit with the inner side wall of the first processing cavity, the first groove is adapted to snap onto the first protrusion. The first protrusion is used to support the clamping plate longitudinally, and the inner side wall of the first processing cavity is used to support the clamping plate laterally. During the loading and unloading process of the I-beam, if the I-beam hits the top of the clamping plate laterally, the inner side wall of the first processing cavity will resist the impact force. If the I-beam hits the top of the clamping plate downward, the first protrusion will resist the impact force. Therefore, whether the I-beam hits the clamping plate laterally, downward, or obliquely downward, it will not cause deformation of the clamping plate or deformation of the output shaft of the linear drive. At the same time, it ensures that the clamping plate fits tightly with the upper and lower transverse plates to prevent leakage of metal dust.

[0024] (8) A hook is fixedly installed at the end of the winch's cable. When the hook is horizontally hung on the end of the I-beam's vertical support plate away from the limiting convex strip, the winch's reeling cable can pull the I-beam horizontally to abut against its limiting convex platform, thereby realizing semi-automatic loading and positioning of the I-beam, avoiding the problem of the I-beam sliding due to difficulty in pushing it by manpower, and improving the convenience and efficiency of operation.

[0025] (9) The arc-shaped pad can be placed under one end of the bottom surface of the I-beam; the arc-shaped pad is used to raise one end of the I-beam to avoid the problem that the end face of the I-beam is stopped by the supporting tooth plate when the I-beam moves horizontally, thereby improving the smoothness of the movement of the I-beam, reducing the difficulty of operation and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present application is further described below with reference to the accompanying drawings: Figure 1 It is a schematic front view of the overall structure of the laser cutting device; Figure 2 This is a front view schematic diagram of the clamping plate clamping the I-beam; Figure 3It is a front view schematic diagram of the state where the clamping plate is fitted with the inner side wall of the first processing chamber; Figure 4 This is a top view of the installation position and structure of the limiting boss; Figure 5 This is a top view schematic diagram of the winch pulling the I-beam horizontally; Figure 6 This is a left side view of the I-beam supporting the tooth plate; Figure 7 This is a left-side schematic diagram of the state where an arc-shaped pad is placed on one end of an I-beam; Figure 8 The diagram is a top-down view of the installation position and structure of the abutment block; Figure 9 This is a schematic diagram of the state where the abutment block is inserted into the reserved through slot; Figure 10 It is a schematic diagram of the V-shaped gap position and structure from the left; Figure 11 It is a front view schematic diagram of the drive component structure; Figure 12 It is a top view schematic diagram of the drive component structure; Figure 13 It is a schematic diagram of the vertical hole position and structure from a top view; Figure 14 This is a front view schematic diagram of the corbel-type lower crossbeam support system structure; Figure 15 It is a front view schematic diagram of the beam support structure; Figure 16 It is a front view schematic diagram of the connection structure of distribution beam, pad, support corbel and support column; Figure 17 It is a right side view of the connection structure of the lower crossbeam, crossbeam bracket, I-beam, spacer and supporting bracket; Figure 18 The right side view diagram of the jack setting position is shown; Figure 19 A front view schematic diagram of the positions of the friction-reducing plate, oblique bolts, and transverse inserts; Figure 20 It is a front view schematic diagram of the distribution beam structure; Figure 21 This is a front view schematic diagram of the installation position of the first bolt; Figure 22 It is a schematic diagram of the front elevation view of the anti-friction plate structure; Figure 23 Schematic diagram of the position and structure of the first cavity from the front; Figure 24 This is a schematic diagram of the first C-shaped portion being cut off; Figure 25 Schematic diagram of the position and structure of the second cavity from the front; Figure 26This is a schematic diagram of the second C-shaped portion being cut off; Figure 27 It is a front view schematic diagram of the first upright portion and the first transverse portion in a hanging state; Figure 28 It is an oblique view schematic diagram of the pad structure; Figure 29 This is a schematic cross-sectional view of the location and structure of the thickened part.

[0027] Description of reference numerals: In the figure, 1. I-beam; 10. Enclosed cavity; 11. Upper horizontal plate; 12. Vertical support plate; 121. Horizontal hole; 13. Lower horizontal plate; 131. Insertion hole; 1311. Circular hole; 1312. Strip hole; 14. Oblique bolt; 141. Thickened portion; 15. Horizontal insert; 151. Horizontal rod; 152. Magnetic block; 2. Laser cutting machine; 21. Bed; 2101. First processing cavity; 2102. First protrusion; 2103. Bed head; 2104. Vertical hole; 211. Supporting tooth plate; 212. Clamping plate; 2121. First slot; 2122. Position-limiting ridge; 21220. Reserved through slot; 21221. V-shaped gap; 213. Linear drive; 22. Drive assembly; 221. First electric slide; 222. Column; 223. Second electric slide; 224. Third electric slide; 23. Laser emitter; 24. Arc pad; 241. Abutment block; 25. Winch; 251. Cable; 252. Hook; 3. Beam support; 31. Bamboo plywood; 32. Square timber; 33. Truss beam; 4. Distribution beam; 5. Supporting corbel; 51. First bolt; 6. Pad; 60. Jack; 61. Bottom plate; 62. Top plate; 621. First through hole; 63. Back plate; 64. Side plate; 641. Operation through hole; 65. Inner support plate; 66. Connecting sleeve; 7. Friction-reducing plate; 71. First vertical portion; 711. Hanging hole; 72. First transverse portion; 721. First limiting hole; 73. First C-shaped portion; 731. First cavity; 74. Second transverse portion; 741. Second limiting hole; 75. Second vertical portion; 76. Third transverse portion; 761. Third limiting hole; 77. Second C-shaped portion; 771. Second cavity; 78. Fourth transverse portion; 781. Fourth limiting hole; 8. Lower crossbeam; 9. Support column; 91. Climbing cone; 13a, lower horizontal board a; 13b, lower horizontal board b. DETAILED DESCRIPTION

[0028] Based on the above structural features of the present application, the implementation methods of the present application are further described: Reference Figure 1 、 Figure 2 and Figure 20 This embodiment provides an I-beam 1, comprising an upper cross plate 11, a vertical support plate 12, and a lower cross plate 13 (fixed integrally) that are fixedly connected in an I-shape. The lower cross plate 13 is provided with an insertion hole 131, which includes a circular hole 1311 and a bar-shaped hole 1312.

[0029] Laser cutting is a commonly used hole-making technology, but it produces metal dust. Normally, the sheet being cut is pressed against the support tooth plate 211, so the metal dust will flow into the gap between the support tooth plate 211 and avoid large-scale diffusion to the outside world. However, the I-beam 1 is usually cut in an inverted position (i.e., with the lower cross plate 13 facing upward) (the height of the laser emitter 23 is greater than the height of the groove in the side wall of the I-beam 1, so when the I-beam 1 is in the upright position, the laser emitter 23 cannot enter the groove in the side wall of the I-beam 1). In this case, the metal dust generated when the lower cross plate 13 is cut will escape in large quantities through the lateral opening of the groove in the side wall of the I-beam 1, thereby polluting the processing environment and damaging the health of the operator.

[0030] To avoid the problem of metal dust escaping, refer to Figures 1 and 2 This embodiment provides a laser cutting device, including a laser cutting machine 2 for cutting the lower horizontal plate 13 of the I-beam 1 to form a socket 131. The laser cutting machine 2 includes a bed 21, a drive assembly 22 connected to the bed 21, and a laser emitter 23 connected to the drive assembly 22.

[0031] Reference Figures 1 and 2 The bed 21 is provided with a first processing chamber 2101, and a plurality of vertical support tooth plates 211 are provided at the bottom of the first processing chamber 2101. The first processing chamber 2101 is rectangular in shape, and the length direction of the support tooth plates 211 is arranged along the width direction of the first processing chamber 2101; the plurality of support tooth plates 211 are arranged at equal intervals along the length direction of the first processing chamber 2101. Clamping blocks are provided between adjacent support tooth plates 211. The clamping blocks are arranged at the bottom of the gaps between adjacent support tooth plates 211. The support tooth plates 211 and the clamping blocks are fixedly connected by bolts (the studs of the bolts are set in the countersunk holes of the clamping blocks). The clamping blocks are fixedly connected to the bottom surface of the first processing chamber 2101 (i.e., the bed 21) by bolts. The supporting tooth plate 211 is used to support the I-beam 1; that is, the metal dust generated by laser cutting falls into the gap between adjacent supporting tooth plates 211, so the metal dust will not raise the I-beam 1, thereby ensuring that the distance between the laser emitter 23 and the I-beams 1 of different processing batches (the same model) will not change (when the distance changes, the cutting accuracy will decrease).

[0032] Reference Figures 1 and 2Two clamping plates 212 capable of moving laterally are provided in the first processing chamber 2101, and the clamping plates 212 are arranged upright. The two clamping plates 212 can clamp the I-beam 1 from both sides, thereby blocking the two sidewall grooves of the I-beam 1 and forming a closed chamber 10. The laser emitter 23 can emit laser downward, and the laser can cut the lower horizontal plate 13 of the I-beam 1 to form the socket 131. The closed chamber 10 is used to store the metal dust generated when the laser cuts the lower horizontal plate 13 (under the impact of the laser and the weight of the metal dust, the metal dust falls into the closed chamber 10), thereby reducing the amount of metal dust that diffuses outward, thereby improving the cleanliness of the processing environment and reducing physical damage to the operator. The closed chamber 10 is open at both ends, thereby ensuring the balance of air pressure inside and outside the closed chamber 10 (the I-beam 1 and the closed chamber 10 both have a large aspect ratio, so the metal dust can be settled before escaping through the end opening of the closed chamber 10).

[0033] Reference Figure 2 and Figure 3 After the laser cutting is completed, the clamping plate 212 and the I-beam 1 are kept in their original positions and in their original state for 0.5 hours to 1 hour to allow the metal dust to accumulate at the bottom of the closed cavity 10. Then, the clamping plate 212 releases the I-beam 1, and the user cleans the metal dust in the groove of the side wall of the I-beam 1 (for example, using a vacuum cleaner); finally, use a lifting device (for example, a crane and an electromagnetic chuck) to lift the I-beam 1 out of the first processing cavity 2101 (that is, unloading the I-beam 1).

[0034] Reference Figure 2A linear actuator 213 is mounted laterally on the sidewall of the first processing chamber 2101. The output shaft of the linear actuator 213 is connected to the clamping plate 212 (e.g., vertically fixedly connected by bolts). The linear actuator 213 is an electric actuator, a pneumatic actuator, a hydraulic actuator, or a combination thereof (e.g., an electro-hydraulic actuator). The housing of the linear actuator 213 is fixedly connected to the outer wall of the bed 21 by bolts. The output shaft of the linear actuator 213 is inserted into the horizontal hole 121 in the sidewall of the bed 21 and is capable of lateral movement. When the output shaft of the linear actuator 213 is extended or retracted, it drives the clamping plate 212 to move laterally. When using lifting equipment to load (i.e., lift and place the I-beam 1 into the first processing chamber 2101) and unload the I-beam 1, the I-beam 1 will often shake (because the crane's sling will shake). When the I-beam 1 shakes, there is a risk of hitting the clamping plate 212, which in turn causes the output shaft of the linear drive 213 to be subjected to bending moment, causing damage to the linear drive 213, and the bent output shaft will be stuck in the horizontal hole 121 on the side wall of the bed 21; and the bent output shaft is difficult to rebound, which will cause the clamping plate 212 to tilt, that is, the clamping plate 212 cannot be perpendicular to the upper cross plate 11 and the lower cross plate 13, making it difficult to stably clamp the I-beam 1; at the same time, a gap will appear between the clamping plate 212 and the upper cross plate 11 / lower cross plate 13, and metal dust will escape through the gap. To avoid such problems, refer to Figure 3 , the outer wall of the clamping plate 212 is provided with a first groove 2121, and the inner wall of the first processing cavity 2101 is provided with a first protrusion 2102 (the first protrusion 2102 is fixedly connected to the inner wall of the first processing cavity 2101 by bolts); when the clamping plate 212 moves laterally to fit with the inner wall of the first processing cavity 2101, the first groove 2121 is adapted to buckle the first protrusion 2102, and the first protrusion 2102 is used to longitudinally support the clamping plate 212; the inner wall of the first processing cavity 2101 is arranged parallel to the clamping plate 212, and the first processing cavity The inner side wall of 2101 is used to laterally support the clamping plate 212; at this time, if the I-beam 1 hits the top of the clamping plate 212 laterally, the inner side wall of the first processing cavity 2101 will resist the impact force, and if the I-beam 1 hits the top of the clamping plate 212 downward, the first protrusion 2102 will resist the impact force. Therefore, no matter whether the I-beam 1 hits the clamping plate 212 laterally, downward or obliquely downward, it will not cause deformation of the clamping plate 212 and deformation of the output shaft of the linear drive 213, thereby improving the impact resistance and service life of the present invention.

[0035] Reference Figure 3 and Figure 4The two clamping plates 212 are respectively connected to the linear drivers 213 on both sides. After the linear driver 213 on the left is extended to a fixed length and remains stationary, the linear driver 213 on the right pushes the clamping plate 212 on the right and the I-beam 1 to move to the left until the I-beam 1 abuts against the clamping plate 212 on the left, thereby realizing the y-axis positioning of the reference position of the I-beam 1.

[0036] Reference Figure 4 and Figure 5 A limiting ridge 2122 is provided at the inner end of the clamping plate 212 (e.g., connected by bolts or an integral fixed connection). The I-beam 1 can slide laterally between the two clamping plates 212 (i.e., slide along the length of the clamping plates 212, i.e., slide in the direction of the first processing cavity 2101 toward the limiting ridge 2122) until the end face of the I-beam 1 abuts the limiting ridge 2122. When the limiting ridge 2122 abuts the I-beam 1, the x-axis positioning of the reference position of the I-beam 1 is achieved; the x-axis and y-axis positioning of the reference position of the I-beam 1 is used to match the movement coordinates of the laser emitter 23, thereby improving the processing accuracy of the position of the socket 131.

[0037] Reference Figure 5 A winch 25 is installed at the end of the bed 21 near the limiting boss (for example, fixedly connected by bolts), and a hook 252 is fixedly installed at the end of the cable 251 of the winch 25. A hanging ring is provided at the end surface of the first processing chamber 2101 away from the winch 25 (for example, fixedly installed by bolts). The installation position of the hanging ring and the installation position of the winch 25 are adapted to the preset clamping position (i.e., the reference position) of the I-beam 1, ensuring that the cable 251 in the tensioned state can be placed in the side wall groove of the I-beam 1, thereby preventing the cable 251 from being clamped by the I-beam 1 and the clamping plate 212. When the hook 252 is horizontally hung on the end of the vertical support plate 12 of the I-beam 1 away from the limiting protrusion 2122, the winch 25 reels the cable 251 and can pull the I-beam 1 to move horizontally until it abuts against its limiting boss.

[0038] During operation, first grab the hook 252 and pull out the rope 251; then hang the hook 252 on the hanging ring, drive the winch 25 to reel in the rope 251, so that the rope 251 is tensioned and clamped in the side wall groove of the I-beam 1; then drive the clamping plate 212 to move laterally until it contacts the I-beam 1 (and does not press it); then the user separates the hook 252 from the hanging ring; then the user hangs the hook 252 on the end of the vertical support plate 12 of the I-beam 1 away from the limiting ridge 2122; then start the winch 25, the winch 25 reels in the rope 251, and pulls the I-beam 1 laterally to abut against its limiting ridge; finally, remove the hook 252 from the vertical support plate 12 and put it into the closed cavity 10, start the winch 25, the winch 25 reels in the rope 251, and pulls the rope 251 and the hook 252 out of the closed cavity 10.

[0039] Reference Figure 6 Since the supporting tooth plate 211 is vertical, and the length direction of the supporting tooth plate 211 is perpendicular to the length direction of the I-beam 1, and the top position of the supporting tooth plate 211 is uneven, when the I-beam 1 moves horizontally along its own length direction, the top of the supporting tooth plate 211 will abut the end face of the I-beam 1, causing the I-beam 1 to be stuck; To avoid such problems, refer to Figure 7 and Figure 8 The laser cutting machine 2 also includes an arc-shaped pad 24, which can be placed under one end of the bottom surface of the I-beam 1, that is, the end of the I-beam 1 is pressed on the arc-shaped pad 24; the arc-shaped pad 24 is used to raise one end of the I-beam 1 to avoid the end face of the I-beam 1 being stopped by the supporting tooth plate 211 when the I-beam 1 moves horizontally, thereby improving the smoothness of the movement of the I-beam 1.

[0040] Reference Figure 7 and Figure 8 An abutment block 241 is fixedly connected to the upper surface of the arc-shaped pad 24 (for example, through an integral fixed connection or a bolted connection). When the end of the I-beam 1 is pressed against the arc-shaped pad 24 and moves laterally, the end face of the I-beam 1 abuts the abutment block 241, allowing the I-beam 1 to push the arc-shaped pad 24 forward synchronously, thus preventing the arc-shaped pad 24 and the I-beam 1 from slipping off. (If the abutment block 241 is not provided, the arc-shaped pad 24 will slip off if the friction between the arc-shaped pad 24 and the supporting tooth plate 211 is greater than the friction between the arc-shaped pad 24 and the I-beam 1.)

[0041] Reference Figure 4 、 Figure 8 and Figure 9 A reserved slot 21220 is provided between the two stopper ridges 2122. This slot 21220 is used to accommodate the curved backing plate 24. The front end of the curved backing plate 24 extends from the front end of the I-beam 1. Therefore, when the I-beam 1 approaches the stopper ridge 2122, space (i.e., the reserved slot 21220) is required for the curved backing plate 24 to be accommodated. After the I-beam 1 and the stopper ridge are in contact, the user manually removes the curved backing plate 24.

[0042] Reference Figure 10Because the entire I-beam 1 and its end face are tilted when the curved pad 24 is placed under the end of the I-beam 1, the lower end of the end face actually abuts the limiting ridge 2122, and a V-shaped gap 21221 is provided between the limiting ridge 2122 and the end face of the I-beam 1. When the curved pad 24 is removed, the end of the I-beam 1 sinks, and the V-shaped gap 21221 becomes a strip gap instead of disappearing. This strip gap prevents the limiting ridge 2122 from properly abutting against the I-beam 1, causing the I-beam 1 to fail to reach the reference position, which in turn causes the cutting position of the insertion hole 131 to deviate. To avoid such problems, personnel need to knock (for example, using a hammer) the end face of the I-beam 1 away from the limiting ridge 2122, so that the I-beam 1 moves further forward, so that the (front) end face of the I-beam 1 fits and abuts against the limiting ridge 2122, thereby eliminating the strip gap and improving the processing accuracy.

[0043] Reference Figure 11 and Figure 12 The drive assembly 22 is an xyz three-axis drive structure. The drive assembly 22 includes a first electric slide 221, a column 222, a second electric slide 223, and a third electric slide 224. The first electric slide 221 is connected to the bed 21, the top and bottom ends of the column 222 are respectively connected to the first electric slide 221 and the second electric slide 223, the third electric slide 224 is connected to the second electric slide 223, and the laser emitter 23 is connected to the third electric slide 224. There are two first electric slides 221 and they are respectively arranged on the left and right sides of the first processing chamber 2101. The two first electric slides 221 are arranged parallel to each other. The track of the first electric slide 221 is fixedly connected to the bed 21 (for example, by bolts), and the slider of the first electric slide 221 is fixedly connected to the bottom end of the column 222 (for example, by bolts). There are two columns 222 and they are respectively arranged on the left and right sides of the first processing chamber 2101. The two ends of the second slide rail are fixedly connected to the top of the two columns 222 respectively (for example, fixedly connected by bolts). The middle part of the track of the third electric slide rail 224 is fixedly connected to the slider of the second electric slide rail 223 (for example, fixedly connected by bolts). The laser emitter 23 is arranged vertically, and the top of the side wall of the laser emitter 23 is fixedly connected to the slider of the third electric slide rail 224 (for example, fixedly connected by bolts). The first electric slide rail 221 and the second electric slide rail 223 are both arranged horizontally, and the first electric slide rail 221 and the second electric slide rail 223 are arranged perpendicular to each other; the third electric slide rail 224 is arranged vertically and is perpendicular to the first electric slide rail 221 and the second electric slide rail 223 respectively. The drive assembly 22 can drive the laser emitter 23 to move along the xyz three axes.

[0044] Reference Figure 12 and Figure 13The first processing cavity 2101 is set at one end of the bed body 21, and a bed head 2103 is provided at the other end of the bed body 21. A vertical hole 2104 is provided on the upper surface of the bed head 2103; when the I-beam 1 is loaded or unloaded, the laser emitter 23 can be inserted into the vertical hole 2104 to hide the laser emitter 23, thereby avoiding the problem of accidentally hitting the laser emitter 23 and causing damage to the laser emitter 23 when loading or unloading the I-beam 1.

[0045] The laser cutting machine 2 also includes an electrical cabinet, which is fixedly mounted on the outer wall of the bed 21 by bolts. The first electric slide 221, the second electric slide 223, the third electric slide 224, the laser emitter 23, and the linear drive 213 are respectively connected to the electrical cabinet via wires and signal lines. The electrical cabinet is connected to an external power supply and an external computer via wires and signal lines. The computer controls the start and stop of the first electric slide 221, the second electric slide 223, the third electric slide 224, the laser emitter 23, and the linear drive 213 of the present invention through the electrical cabinet.

[0046] The laser cutting device has a simple structure and reliable function. The clamping plate 212 is used to seal the side wall groove of the I-beam 1 to form a closed cavity 10. The closed cavity 10 is used to store the metal dust generated when the laser cuts the lower cross plate 13, thereby reducing the amount of metal dust diffused outward, thereby improving the cleanliness of the processing environment and reducing physical damage to the operator.

[0047] Reference Figure 14 The cast-in-place support of the cable-stayed bridge is used to support the main beam. There are several cast-in-place supports and they are arranged at equal intervals along the length of the main beam. The cast-in-place support is H-shaped. A single cast-in-place support includes a lower crossbeam 8 and two vertical support columns 9. The lower crossbeam 8 is arranged horizontally and the vertical support columns 9 are arranged vertically. The two vertical support columns 9 are fixedly connected to the two ends of the lower crossbeam 8 respectively. When the cast-in-place support is cast, the vertical support columns 9 are usually cast first, and then the lower crossbeam 8 is cast; in order to temporarily support the casting mold of the lower crossbeam 8 and the lower crossbeam 8 that has not been fully hardened, a corbel-type lower crossbeam support system needs to be installed. After the lower crossbeam 8 is hardened, the corbel-type lower crossbeam support system and the casting mold are removed.

[0048] Reference Figure 14 、 Figure 15 and Figure 16 The corbel-type lower crossbeam support system includes a crossbeam bracket 3 for supporting the lower crossbeam 8, a distribution beam 4 for supporting the crossbeam bracket 3, and a support corbel 5 disposed below the distribution beam 4. The support corbel 5 is connected to the vertical support column 9 at the end of the lower crossbeam 8. The support corbel 5 is connected to the side wall of the vertical support column 9 (the vertical support column 9 has a climbing cone 91 and / or a pre-embedded sleeve embedded in it, and the mounting hole of the support corbel 5 is inserted with a mounting bolt, which is threadedly connected to the climbing cone 91 or the pre-embedded sleeve).

[0049] Reference Figure 15 and Figure 17 The crossbeam support 3 includes bamboo plywood 31, square timbers 32, and truss beams 33. The bamboo plywood 31 abuts the lower surface of the lower mold of the casting mold, or directly contacts the bottom surface of the lower crossbeam 8 to serve as the lower mold. Several square timbers 32 are provided and adapted to abut the lower surface of the bamboo plywood 31. Several truss beams 33 are provided and adapted to abut the lower surface of the square timbers 32. The square timbers 32 and bamboo plywood 31 are detachably connected by screws, and the square timbers 32 and truss beams 33 are detachably connected by bolts.

[0050] Reference Figure 17 The timbers 32 are arranged perpendicular to the truss beams 33. Several truss beams 33 are evenly spaced along the length of the timbers 32. Adjacent truss beams 33 are supported by transversely arranged angle steels (the ends of the angle steels are welded to two adjacent truss beams 33). The bottom ends of the truss beams 33 are connected to the two distribution beams 4 (e.g., by crimping, clamping, welding, or bolting).

[0051] Reference Figure 16 、 Figure 19 and Figure 20 The distribution beam 4 includes two I-beams 1 fixedly connected in a II shape (for example, by welding). The insertion hole 131 includes a circular hole 1311 and a strip hole 1312. The circular hole 1311 is provided on the I-beam 1 away from the support column 9, and the strip hole 1312 is provided on the I-beam 1 closer to the support column 9.

[0052] Reference Figure 18 and Figure 19 , and also includes a replaceable pad 6 arranged between the I-beam 1 and the supporting corbel 5; the top surface of the pad 6 is detachably connected to the I-beam 1 by an obliquely inserted bolt 14 inserted into the circular hole 1311, and the bottom surface is detachably connected to the supporting corbel 5 by a first bolt 51. The pad 6 includes a first pad and a second pad, and the height of the first pad is higher than the second pad. There are several first pads, and there are several second pads; after the lower crossbeam 8 is hardened, the first pad is replaced with the second pad, and then the distribution beam 4 is pressed onto the second pad, thereby realizing the overall lowering of the crossbeam support 3, providing space for the later disassembly and removal of the crossbeam support 3 (because when the lower crossbeam 8, the crossbeam support 3, and the distribution beam 4 are vertically pressed against each other, it is difficult to pull out the bamboo plywood 31, the square wood 32, the truss beam 33, and the distribution beam 4 horizontally).

[0053] Reference Figure 21 and Figure 22, also includes a friction-reducing plate 7 in a bent plate structure; the friction-reducing plate 7 comprises a first upright portion 71, a first transverse portion 72, a first C-shaped portion 73, a second transverse portion 74, a second upright portion 75, a third transverse portion 76, a second C-shaped portion 77, and a fourth transverse portion 78, which are fixedly connected in sequence (in an integrated manner). The first upright portion 71, the first transverse portion 72, the second transverse portion 74, the second upright portion 75, the third transverse portion 76, and the fourth transverse portion 78 are all flat plate structures. The first upright portion 71 and the first C-shaped portion 73 are located at either end of the first transverse portion 72, and the second upright portion 75 and the second C-shaped portion 77 are located at either end of the third transverse portion 76. The first transverse portion 72 and the second transverse portion 74 can both be placed between the lower transverse plate 13 and the pad 6, and the bottom surface of the first transverse portion 72 and the top surface of the second transverse portion 74 fit together. When the first C-shaped portion 73 is cut off, the first transverse portion 72 and the second transverse portion 74 can slide against each other, thereby reducing the resistance to the lateral withdrawal of the first pad; the third transverse portion 76 and the fourth transverse portion 78 can both be arranged between the pad 6 and the supporting corbel 5, and the bottom surface of the third transverse portion 76 and the top surface of the fourth transverse portion 78 fit together. When the second C-shaped portion 77 is cut off, the third transverse portion 76 and the fourth transverse portion 78 can slide against each other, thereby reducing the resistance to the lateral withdrawal of the first pad.

[0054] Reference Figure 21 and Figure 22 The height of the second column 222 is adapted to the height of the first pad, and the distance between the second transverse portion 74 and the third transverse portion 76 is adapted to the height of the first pad, so that the first pad can be adapted and inserted between the second transverse portion 74 and the third transverse portion 76.

[0055] Reference Figures 23 to 26A first cavity 731 with a horizontal teardrop-shaped cross section is provided on the inner side of the first C-shaped portion 73 , and a second cavity 771 with a horizontal teardrop-shaped cross section is provided on the inner side of the second C-shaped portion 77 . By vertically cutting out the first C-shaped portion 73 along the maximum height position of the horizontal teardrop-shaped first cavity 731, the first cavity 731 can be exposed, thereby facilitating the user to put lubricant between the first horizontal portion 72 and the second horizontal portion 74 through the first cavity 731, further reducing the sliding friction between the first horizontal portion 72 and the second horizontal portion 74, reducing the resistance to the horizontal withdrawal of the first pad, and reducing the construction difficulty for the user; similarly, by vertically cutting out the second C-shaped portion 77 along the maximum height position of the horizontal teardrop-shaped second cavity 771, the second cavity 771 can be exposed, thereby facilitating the user to put lubricant between the third horizontal portion 76 and the fourth horizontal portion 78 through the second cavity 771, further reducing the friction between the third horizontal portion 76 and the fourth horizontal portion 78, reducing the resistance to the horizontal withdrawal of the first pad, and reducing the construction difficulty for the user. At the same time, it can avoid the problem of lack of movable clearance of the pad due to the failure to perform flame cutting (in traditional technology, after flame cutting, a gap will be formed between the top of the pad 6 and the I-beam 1, which is convenient for withdrawing the pad 6; or the middle of the pad 6 will be cut off and a gap will be left, so that the upper part of the pad 6 sinks to facilitate the smooth withdrawal of the pad 6).

[0056] The bottle body containing the lubricant is provided with a pointed mouth structure, which can be adapted to be inserted into the first cavity 731 or the second cavity 771. The lubricant squeezed out through the pointed mouth can be temporarily stored in the first cavity 731 / the second cavity 771, and then immersed between the first transverse part 72 and the second transverse part 74 / between the third transverse part 76 and the fourth transverse part 78, thereby avoiding the problem of the lubricant flowing vertically to the top surface of the supporting corbel 5.

[0057] Reference Figure 22 、 Figure 23 and Figure 25 According to the height of the first pad, the friction-reducing plate 7 is prefabricated in the factory, and before leaving the factory, both ends of the first cavity 731 and the second cavity 771 are sealed (for example, using wax, cotton strips, etc. for sealing). Therefore, after the friction-reducing plate 7 is installed and before the first C-shaped portion 73 / the second C-shaped portion 77 is removed, dust at the construction site cannot enter the first cavity 731 and the second cavity 771, thereby preventing dust particles from being stuck between the first transverse portion 72 and the second transverse portion, and between the third transverse portion 76 and the fourth transverse portion 78, thereby reducing the sliding friction between the first transverse portion 72 and the second transverse portion 74, and reducing the sliding friction between the third transverse portion 76 and the fourth transverse portion 78, thereby reducing the construction difficulty for users.

[0058] Reference Figure 21 and Figure 27A removable transverse plug-in 15 is inserted transversely into the middle portion of the distribution beam 4; the first upright portion 71 is inserted into the strip-shaped hole 1312, and the end of the transverse plug-in 15 is inserted into the hanging hole 711 at the upper portion of the first upright portion 71. Then, when the first pad is removed, the first transverse portion 72 with lubricant adhered to its bottom surface can be hung on the lower bottom surface of the distribution beam 4 without falling onto the upper surface of the support bracket 5. Therefore, the upper surface of the support bracket 5 and the lower surface of the lower cross plate 13 of the I-beam 1 will not adhere to the lubricant, thereby improving the cleanliness of the support bracket 5 and the distribution beam 4 during turnover use, thereby improving the safety of the jack 60 (when the jack 60 is in use, its upper and lower surfaces need to abut against the lower surface of the lower cross plate 13 of the I-beam 1 and the upper surface of the support bracket 5, respectively. The present invention can prevent the lubricant from adhering to the upper and lower surfaces of the jack 60, thereby avoiding the risk of the jack 60 itself slipping during the process of supporting the distribution beam 4, thereby improving construction safety).

[0059] Reference Figure 21 、 Figure 22 and Figure 27 The vertical support plates 12 of the two I-beams 1 each have a horizontal hole 121 at their mid-height positions. The two horizontal holes 121 are coaxially arranged. When the first vertical portion 71 is inserted into the strip-shaped hole 1312 and the first horizontal portion 72 is press-fitted against the bottom surface of the lower horizontal plate 13 of the I-beam 1, the hanging hole 711 is coaxially arranged with the horizontal hole 121. The horizontal plug 15 includes a horizontal rod 151 and a magnetic block 152 fixedly mounted at the end of the horizontal rod 151 (e.g., bolted together). When the horizontal rod 151 is inserted into the horizontal hole 121 and the hanging hole 711, the magnetic block 152 can be attracted to the side wall of the vertical support plate 12 of the I-beam 1, thereby preventing the horizontal plug from accidentally falling off. The I-beam 1 is made of high-strength iron-containing steel (e.g., Q420, Q460, etc.), and the magnetic block 152 is made of a permanent magnetic material (e.g., an aluminum-nickel-cobalt permanent magnet alloy, an iron-chromium-cobalt permanent magnet alloy, or a permanent ferrite).

[0060] Reference Figures 23 to 26 When the first and second C-shaped portions 73 and 77 are not removed, they can prevent dust particles from the construction site from entering the first cavity 731 and the second cavity 771, respectively. After the first C-shaped portion 73 is removed, the first cavity 731 is used to guide the lubricant into the gap between the first and second transverse portions 72 and 74 (based on capillary action). After the second C-shaped portion 77 is removed, the second cavity 771 is used to guide the lubricant into the gap between the third and fourth transverse portions 76 and 78 (based on capillary action).

[0061] Reference Figure 20 、 Figure 21 and Figure 22The lower horizontal plate 13 of the I-beam 1 away from the vertical support column 9 is the lower horizontal plate a13a, and the circular hole 1311 is set at the end of the lower horizontal plate a13a away from the vertical support column 9, so as to avoid the first vertical portion 71 being inserted between the two I-beams 1, so that the first vertical portion 71 is located between the vertical support column 9 and the distribution beam 4 (the user stands on the side of the distribution beam 4 away from the vertical support column 9, the user extends his hand between the distribution beam 4 and the vertical support column 9 and swings the first vertical support portion, so that the hanging hole 711 and the two horizontal holes 121 are aligned The lower transverse plate 13 of the I-beam 1 near the vertical support column 9 is the lower transverse plate b13b, and the strip hole 1312 is provided at the end of the lower transverse plate b13b near the vertical support column 9. This allows users of the oblique insertion bolt 14 to easily insert the oblique insertion bolt 14 into the circular hole 1311 or to easily remove the oblique insertion bolt 14 from the circular hole 1311 (if the circular hole 1311 is provided between the two I-beams 1, users will not be able to install or remove the oblique insertion bolt 14).

[0062] Reference, 21 and Figure 22 The first transverse portion 72 is provided with a first limiting hole 721, and the second transverse portion 74 is provided with a second limiting hole 741. Both the first limiting hole 721 and the second limiting hole 741 are adapted to the circular hole 1311. The third transverse portion 76 is provided with a third limiting hole 761, and the fourth transverse portion 78 is provided with a fourth limiting hole 781. Both the third limiting hole 761 and the fourth limiting hole 781 are adapted to the installation position of the first bolt 51.

[0063] Reference Figure 16 and Figure 28 The pad 6 includes a bottom plate 61, a top plate 62, a back plate 63, a side plate 64, an inner support plate and a connecting sleeve 66 that are fixedly connected to form a rectangular box structure. The connecting sleeve 66 is installed in an inclined shape in the inner cavity of the pad 6, and the connecting sleeve 66 is fixedly connected to the side wall of the inner support plate 65 by bolts or welding. The top plate 62 is provided with a first through hole 621 that adapts to the inner cavity of the connecting sleeve 66; the obliquely inserted bolt 14 passes through the circular hole 1311, the first limiting hole 721, the second limiting hole 741 and the first through hole 621 and is screwed with the thread of the inner wall of the connecting sleeve 66. The bottom plate 61 is provided with a second through hole, the second through hole is adapted to the installation position of the first bolt 51, and the first bolt 51 is inserted into the second through hole, the third limiting hole 761, the fourth limiting hole 781 and the third through hole on the top surface of the supporting bracket 5 and locked, thereby achieving fixed installation of the pad 6 and the friction reducing plate 7. The first cushion block and the second cushion block both adopt this type of structure, and the height difference between the first cushion block and the second cushion block is 100 mm to 300 mm.

[0064] Reference Figure 28The front end of the cushion block 6 is an open structure, and the side plate 64, the back plate 63 and the inner support plate 65 are respectively provided with a number of operating through holes 641. The user extends his hand or a screwdriver into the inner cavity of the cushion block 6 through the opening or the operating through hole 641, and can grasp or rotate the column head or nut of the first bolt 51, thereby realizing convenient loading and unloading of the first bolt 51.

[0065] Reference Figure 29 The top of the stud of the oblique bolt 14 is provided with an integrally formed thickened portion 141. When the oblique bolt 14 is installed, the thickened portion 141 is inserted into the circular hole 1311, the first limiting hole 721, the second limiting hole 741 and the first through hole 621, thereby improving the shear resistance of the oblique bolt 14 and preventing the distribution beam 4 from moving horizontally; at the same time, the thread of the stud of the oblique bolt 14 is arranged below the thickened portion 141, so that the thread will not be directly sheared and squeezed by the lower cross plate 13, the first cross portion 72, the second cross portion 74 and the top plate 62, so the thread can be avoided from being damaged, so as to achieve smooth loading and unloading of the oblique bolt 14.

[0066] The construction method of the corbel type lower cross beam support system includes the steps of installing the leg type lower cross beam 8 support system and removing the corbel type lower cross beam support system.

[0067] The steps for installing a corbel-type lower beam support system include: S1. Connect the supporting corbel 5 to the vertical support column 9.

[0068] S2. Insert the first spacer between the second transverse portion 74 and the third transverse portion 76 of the friction reducing plate 7.

[0069] S3 , placing the first pad and the friction reducing plate 7 on the supporting corbel 5 and connecting them with the first bolt 51 .

[0070] S4 , press the distribution beam 4 onto the first transverse portion 72 (for example, by using a crane); when the distribution beam 4 falls, the first vertical portion 71 is inserted into the strip-shaped hole 1312 .

[0071] S5. Use diagonal bracing bolts to securely connect the distribution beam 4, the friction reducing plate 7 and the first cushion block.

[0072] S6. Insert the horizontal plug-in unit 15 into the horizontal hole 121 and the hanging hole 711.

[0073] S7. Assemble the crossbeam support 3 and press it onto the distribution beam 4.

[0074] S8. Assemble the casting mold of the lower crossbeam 8 and press it onto the crossbeam support 3.

[0075] The steps for removing the corbel-type lower crossbeam support system include: S1, place the jack 60 between the distribution beam 4 and the supporting bracket 5; drive the top support plate of the jack 60 to rise, so as to use the jack 60 to support the distribution beam 4 (refer to Figure 18 ).

[0076] S2. Replace the first pad originally installed between the distribution beam 4 and the supporting corbel 5 with the second pad.

[0077] S3, the jack 60 falls back (the top support plate of the jack 60 falls back) until the distribution beam 4 is pressed against the second cushion block; then the second cushion block is connected to the distribution beam 4 using the obliquely inserted bolts 14.

[0078] S4. Remove the jack 60 (ie, take the jack 60 out from between the distribution beam 4 and the supporting corbel).

[0079] S5. Dismantle and remove the beam support 3 (for example, using a crane).

[0080] S6. Disassemble and remove the distribution beam 4, the second pad and the supporting corbel 5.

[0081] The dismantling step S2 further comprises the following steps, S21 , remove the obliquely inserted bolt 14 and the first bolt 51 .

[0082] S22 , cutting off the first C-shaped portion 73 and the second C-shaped portion 77 to expose the first cavity 731 and the second cavity 771 .

[0083] S23 , filling lubricant into the first cavity 731 and the second cavity 771 respectively.

[0084] S24 , leaving the container to stand for 10 to 30 minutes until the lubricant flows into the space between the first transverse portion 72 and the second transverse portion 74 , and into the space between the third transverse portion 76 and the fourth transverse portion 78 .

[0085] S25. Laterally pull out the first cushion block, the second transverse portion 74, the third transverse portion 76 and the second vertical portion 75 (the user can manually pull out the first cushion block with the help of a crowbar or a pull rod; the user can mechanically pull out the first cushion block with the help of a pulley and a crane).

[0086] S26, pull out the horizontal plug-in unit 15, and remove the first vertical portion 71 and the first horizontal portion 72; during the process, the user lifts the first horizontal portion 72 upward from the bottom by hand to prevent the first horizontal portion 72 from contacting the supporting bracket 5, thereby preventing the supporting bracket 5 from contacting the lubricant.

[0087] S27 , remove the fourth transverse portion 78 .

[0088] S28 , placing the second pad on the supporting corbel 5 and fixing it with the first bolt 51 .

[0089] The jack 60 is a hydraulic jack 60 .

[0090] The lubricant is a water-soluble stretching oil. Since the first transverse portion 72, the second transverse portion 74, the third transverse portion 76 and the fourth transverse portion 78 will be stretched during relative sliding, the water-soluble stretching oil can promptly cover the stretched positions, thereby preventing a sudden increase in friction.

[0091] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0092] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections, or integral connections; mechanical or electrical connections; direct connections or connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0093] To sum up, for those skilled in the art, according to the guidance of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, replacements and deformations made to the present invention still fall within the scope of protection of the present invention.

Claims

1. The bracket-type lower beam support system is characterized by: It comprises a crossbeam support (3) for supporting a lower crossbeam (8), a distribution beam (4) for supporting the crossbeam support (3), and a supporting bracket (5) arranged below the distribution beam (4); the supporting bracket (5) is connected to a vertical support column (9) at the end of the lower crossbeam (8); The distribution beam (4) comprises two I-shaped steel beams (1) fixedly connected in a II shape; the lower transverse plate (13) of the I-shaped steel beam (1) is provided with an insertion hole (131); the insertion hole (131) comprises a circular hole (1311) and a strip-shaped hole (1312); It also includes a replaceable spacer (6) disposed between the I-beam (1) and the supporting bracket (5); the top surface of the spacer (6) is detachably connected to the I-beam (1) via an obliquely inserted bolt (14) inserted into the circular hole (1311), and the bottom surface is detachably connected to the supporting bracket (5) via a first bolt (51); It also includes a friction reducing plate (7) in a bent plate structure; the friction reducing plate (7) includes a first upright portion (71), a first transverse portion (72), a first C-shaped portion (73), a second transverse portion (74), a second upright portion (75), a third transverse portion (76), a second C-shaped portion (77) and a fourth transverse portion (78) which are fixedly connected in sequence; the first transverse portion (72) and the second transverse portion (74) can both be placed between the lower transverse plate (13) and the cushion block (6), and the bottom surface of the first transverse portion (72) and the top surface of the second transverse portion (74) fit together; the third transverse portion (76) and the fourth transverse portion (78) can both be arranged between the cushion block (6) and the supporting corbel (5), and the bottom surface of the third transverse portion (76) and the top surface of the fourth transverse portion (78) fit together; A first cavity (731) is provided inside the first C-shaped portion (73), and a second cavity (771) is provided inside the second C-shaped portion (77); A detachable transverse plug-in unit (15) is inserted transversely into the middle of the distribution beam (4); the first upright portion (71) is inserted into the strip-shaped hole (1312), and the end of the transverse plug-in unit (15) is inserted into the hanging hole (711) at the upper portion of the first upright portion (71).

2. The corbel type lower crossbeam support system according to claim 1, characterized in that: The cushion block (6) comprises a first cushion block and a second cushion block, and the height of the first cushion block is higher than that of the second cushion block.

3. The corbel type lower crossbeam support system according to claim 2, characterized in that: After the first C-shaped portion (73) is cut off, the first cavity (731) is used to guide the lubricant into the gap between the first transverse portion (72) and the second transverse portion (74); after the second C-shaped portion (77) is cut off, the second cavity (771) is used to guide the lubricant into the gap between the third transverse portion (76) and the fourth transverse portion (78).

4. Laser cutting device, characterized in that: The laser cutting machine (2) is used for cutting the I-beam (1) in the bracket-type lower crossbeam support system according to any one of claims 1 to 3, and the laser cutting machine (2) is capable of cutting the lower cross plate (13) of the I-beam (1) to form a socket (131); The laser cutting machine (2) comprises a bed (21), a drive assembly (22) connected to the bed (21), and a laser emitter (23) connected to the drive assembly (22); The bed (21) is provided with a first processing cavity (2101), and a plurality of vertical supporting tooth plates (211) are provided at the bottom of the first processing cavity (2101), and the supporting tooth plates (211) are used to support the I-beam (1); Two clamping plates (212) capable of moving laterally are provided in the first processing chamber (2101), and the two clamping plates (212) can clamp the I-beam (1) from both sides to form a closed chamber (10); the laser emitter (23) can emit laser downward; and the closed chamber (10) is used to store metal dust generated when the laser cuts the lower horizontal plate (13).

5. The laser cutting device according to claim 4, characterized in that: A linear drive (213) is laterally mounted on the side wall of the first processing chamber (2101), and an output shaft of the linear drive (213) is connected to the clamping plate (212).

6. The laser cutting device according to claim 5, characterized in that: The outer wall of the clamping plate (212) is provided with a first clamping groove (2121), and the inner wall of the first processing cavity (2101) is provided with a first protrusion (2102); when the clamping plate (212) moves laterally to fit with the inner wall of the first processing cavity (2101), the first clamping groove (2121) is adapted to snap fit the first protrusion (2102), and the first protrusion (2102) is used to longitudinally support the clamping plate (212).

7. The laser cutting device according to claim 6, characterized in that: The inner wall end of the clamping plate (212) is provided with a limiting convex strip (2122); the I-beam (1) can slide laterally between the two clamping plates (212) until the end face of the I-beam (1) abuts against the limiting convex strip (2122).

8. The laser cutting device according to claim 7, characterized in that: The laser cutting machine (2) further comprises an arc-shaped pad (24), which can be arranged on one end of the bottom surface of the I-beam (1); the arc-shaped pad (24) is used to raise one end of the I-beam (1) to prevent the end surface of the I-beam (1) from being stopped by the supporting tooth plate (211); A reserved through groove (21220) is provided between the two limiting convex strips (2122), and the reserved through groove (21220) is used to accommodate the arc-shaped pad (24).

9. The laser cutting device according to claim 8, characterized in that: The driving assembly (22) comprises a first electric slide rail (221), a column (222), a second electric slide rail (223) and a third electric slide rail (224); the first electric slide rail (221) is connected to the bed (21); the top and bottom ends of the column (222) are respectively connected to the first electric slide rail (221) and the second electric slide rail (223); the third electric slide rail (224) is connected to the second electric slide rail (223); and the laser emitter (23) is connected to the third electric slide rail (224); The first processing cavity (2101) is arranged at one end of the bed (21), and a vertical hole (2104) is provided at the other end of the bed (21); when the I-beam (1) is loaded or unloaded, the laser emitter (23) can be inserted into the vertical hole (2104).

10. The construction method of the bracket-type lower crossbeam support system is characterized by: The steps of dismantling the corbel type lower crossbeam support system according to any one of claims 1 to 3 include: S1, placing a jack (60) between the distribution beam (4) and the supporting bracket (5), and using the jack (60) to support the distribution beam (4); S2, replacing the first pad originally installed between the distribution beam (4) and the supporting corbel (5) with the second pad; S3, the jack (60) falls back until the distribution beam (4) is pressed onto the second pad; then the second pad is connected to the distribution beam (4) using the obliquely inserted bolt (14); S4, removing the jack (60); S5, removing the crossbeam support (3); S6, removing the distribution beam (4), the second pad and the supporting corbel (5); Step S2 further includes the following steps, S21, removing the obliquely inserted bolt (14) and the first bolt (51); S22, cutting off the first C-shaped portion (73) and the second C-shaped portion (77), exposing the first cavity (731) and the second cavity (771); S23, filling lubricant into the first cavity (731) and the second cavity (771) respectively; S24, standing still until the lubricant flows into between the first transverse portion (72) and the second transverse portion (74), and between the third transverse portion (76) and the fourth transverse portion (78); S25, laterally pulling out the first cushion block, the second transverse portion (74), and the third transverse portion (76); S26, extracting the horizontal plug-in unit (15), and removing the first vertical portion (71) and the first horizontal portion (72); S27, removing the fourth transverse portion (78); S28, placing the second pad on the supporting corbel (5) and fixing it with a first bolt (51).

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