T-beam hoisting equipment and hoisting method

Abstract

This invention discloses a T-beam hoisting device and method. The device includes: a base for supporting the beam ribs of the T-beam, the base having a groove lower than the bottom of the beam ribs; a beam rib clamp including U-shaped rods and clamping plates, the middle of a pair of U-shaped rods being hinged to the bottom of the groove using a scissor structure, and a clamping plate rotatably connected to both ends of the U-shaped rods; a flange guard plate wrapping around both sides of the T-beam flange, with rope grooves on the outer side of the flange guard plate; and a steel wire rope whose lower end is connected to the base and suspended from the beam. This invention overcomes the problems of T-beam corner damage and unstable hoisting during T-beam hoisting. By setting a base to increase the uniformity of force on the beam ribs, setting a beam rib clamp to fix the base to the T-beam to prevent the T-beam from swaying, and using flange guard plates to protect and limit the T-beam flanges, the invention achieves stable hoisting of the T-beam and protects the flanges and beam rib corners from damage.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, and in particular to a T-beam hoisting device and hoisting method. Background Technology

[0002] T-beam hoisting is a crucial step in bridge construction. After the T-beams are transported from the prefabrication yard to the construction site, they must be lifted smoothly and slowly placed into their installation position during hoisting, which places high demands on the performance of the hoisting equipment.

[0003] Currently, the common method is to use steel wire ropes to support and lift the T-beams at both ends. However, due to the large self-weight of the T-beams and the small force-applying area of ​​the steel wire ropes, stress concentration during lifting can damage the beam ribs and flange corners of the T-beams, affecting their strength. Therefore, it is necessary to install structures to protect the corners of the T-beams. Chinese Patent Publication No. CN218809837U, published on April 7, 2023, entitled "A Corner Protection Device for Lifting Precast T-Beams," discloses a device that can be used for lifting T-beams, including flange corner protectors, elastic pads, limiting devices, and anti-detachment devices. When applied to the lifting of T-beams, it can provide protection for the corners of the T-beams. However, the corner protection device provided by this patent only provides a certain degree of protection for the corners and is not effective in fixing the T-beams. It can also hinder the installation of other structures used to fix the T-beams, and cannot guarantee the stability and safety of the T-beam lifting process. Summary of the Invention

[0004] To overcome problems such as damage to the edges and corners of T-beams and instability during T-beam hoisting, this invention provides a T-beam hoisting device and method. By setting a base to increase the uniformity of force on the beam ribs, setting beam rib clamps to fix the base to the T-beam to prevent the T-beam from swaying, and using flange guards to protect and limit the flanges of the T-beam, the T-beam can be hoisted smoothly, and the edges and corners of the flanges and beam ribs can be protected to prevent damage.

[0005] To achieve the above objectives, the present invention adopts the following solution:

[0006] T-beam hoisting equipment, including:

[0007] A base for supporting the beam ribs of a T-beam, the base having a groove lower than the bottom of the beam ribs;

[0008] A beam rib clamp includes U-shaped rods and clamping plates. A pair of U-shaped rods are hinged in the middle with a scissor structure and the hinge shaft is fixed to the bottom of the groove. Each U-shaped rod can be rotatably connected to a clamping plate at both ends. The inner side of the clamping plate is in contact with the beam rib, and the outer side is provided with a connecting block with a through hole. The connecting blocks of two clamping plates located on one side of the beam rib are connected by a threaded rod passing through the through hole and fixed with a matching nut.

[0009] The flange guard plate is a pair of U-shaped plates that wrap around both sides of the flange of the T-beam, and the outer side of the flange guard plate is provided with rope grooves.

[0010] There are at least two steel wire ropes, the lower ends of which are respectively connected to the two sides of the base. The steel wire ropes pass upward through the rope groove and are suspended from the lifting beam of the lifting device.

[0011] Preferably, the bottom of the base is provided with a pair of limiting grooves along the extension direction of the T-beam, and a limiting rod is engaged in the limiting groove. The two ends of the limiting rod are respectively fixedly connected to the two ends of a steel wire rope, and the two ends of the limiting groove are provided with openings for the steel wire rope to pass through.

[0012] Preferably, the groove on the base is a rectangular groove that extends through both sides of the base along the width direction of the T-beam.

[0013] Preferably, each of the flange guard plates is provided with two rope grooves, which converge upwards and are arranged in a figure-eight shape.

[0014] Preferably, the outer side of the flange guard is provided with a detachable sub-plate for covering the rope groove.

[0015] Preferably, the outer side of the flange guard is provided with a plate clamp, and the multiple plate clamps limit and fix the sub-plate from the left, right and bottom sides respectively.

[0016] Preferably, the lifting beam is an adjustable lifting beam with multiple limiting posts evenly spaced on its main beam, and the wire rope is suspended between the limiting posts on the main beam.

[0017] This application also provides a method for hoisting T-beams, using a T-beam hoisting device as provided in any of the above solutions, the method comprising the following steps:

[0018] S1: Place the base at the bottom of the beam rib of the T-beam, rotate the U-shaped rod of the beam rib clamp and adjust the angle of the clamping plate so that each clamping plate fits the side of the beam rib. On both sides of the beam rib, threaded rods are passed through the through holes on the connecting blocks of the two clamping plates and locked with nuts.

[0019] S2: Wrap the T-beam with the flange guard plate, pull the steel wire rope connecting the base upward and pass it through the rope groove of the flange guard plate, then suspend the steel wire rope on the lifting beam and adjust the suspension point to the balance position.

[0020] S3: After setting up T-beam hoisting devices at both ends of the T-beam in the same way, use a hoisting device to lift the T-beam and move it to the installation position. After installing the T-beam, remove the wire rope, flange guard plate and base.

[0021] The present invention includes at least the following beneficial effects: (1) The T-beam is supported by the base to avoid stress concentration on the beam ribs, and the flange guard plate is used to protect the flange corners to prevent damage to the T-beam corners during hoisting; (2) The T-beam is fixed to the base with the beam rib clamp to prevent the T-beam from swaying on the base, ensuring the stability of the T-beam and construction safety during hoisting, and the clamp spacing of the beam rib clamp is adjustable to adapt to beam ribs of different sizes; (3) By setting the upward converging rope groove on the flange guard plate, the wire rope and the flange guard plate have a better fit, and the angle of the wire rope suspended under the hoisting beam after convergence is closer to vertical, which can reduce the degree of swaying of the wire rope under the hoisting beam; (4) The lower end of the wire rope can be connected to the limiting rod clamped under the base, and the device can be quickly installed and removed, improving work efficiency. Attached Figure Description

[0022] Figure 1 This is a front view of one of the structures of the present invention;

[0023] Figure 2 This is a side view of one of the structures of the present invention;

[0024] Figure 3 This is a top view of a base structure according to the present invention;

[0025] Figure 4 This is a bottom view of a base structure according to the present invention;

[0026] Figure 5 This is a schematic diagram of a flange guard structure according to the present invention.

[0027] In the diagram: 1. Base; 2. T-beam; 3. Groove; 4. U-shaped rod; 5. Clamping plate; 6. Connecting block; 7. Threaded rod; 8. Flange guard plate; 9. Rope groove; 10. Wire rope; 11. Lifting beam; 12. Limiting rod; 13. Sub-plate; 14. Plate clamp. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0029] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0030] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the materials described are commercially available unless otherwise specified. In the description of this invention, it should be noted that, unless otherwise explicitly stated and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0031] like Figure 1-5 As shown, the T-beam hoisting device provided by the present invention includes:

[0032] A base 1 is used to support the beam ribs of the T-beam 2, and the base 1 is provided with a groove 3 that is lower than the bottom of the beam ribs;

[0033] The beam rib clamp includes a U-shaped rod 4 and a clamping plate 5. The middle of a pair of U-shaped rods 4 is hinged with a scissor structure and the hinge shaft is fixed to the bottom of the groove 3. Each U-shaped rod 4 can be rotatably connected to a clamping plate 5 at both ends. The inner side of the clamping plate 5 is in contact with the beam rib, and the outer side is provided with a connecting block 6 with a through hole. The connecting blocks 6 of the two clamping plates 5 located on one side of the beam rib are connected by a threaded rod 7 passing through the through hole and fixed with a matching nut.

[0034] The flange guard plate 8 is a pair of U-shaped plates that wrap around the two sides of the flange of the T beam 2 respectively, and the outer side of the flange guard plate 8 is provided with a rope groove 9.

[0035] There are at least two steel wire ropes 10, the lower ends of which are respectively connected to the two sides of the base 1. The steel wire ropes 10 pass upward through the rope groove 9 and are suspended from the lifting beam 11 of the lifting device.

[0036] The base 1 can be rectangular in shape. The groove 3 is located in the middle of the upper side of the base 1, providing sufficient space for adjustment of the beam rib clamp. The beam rib of the T-beam 2 is supported on the upper sides of the base 1 on both sides of the groove 3. A pair of U-shaped rods 4 cross vertically to form a scissor structure, with bushings at their contact points. The hinge shaft is vertically fixed at the center of the bottom of the groove 3, and the two bushings are concentrically fitted onto the hinge shaft. Each U-shaped rod 4 has two vertical sections pointing upwards, located on either side of the beam rib. The ends of the four vertical sections are at the same height, and each vertical section has a clamping plate 5 hinged to its end. The hinge point can be the side edge, side, or bottom of the clamping plate 5. The clamping plate 5 is vertical and can rotate horizontally to fit against the beam rib, and its rotation, combined with the rotation of the U-shaped rods 4, allows for greater flexibility. With a wide beam rib, when it is attached to the beam rib, the through hole of the connecting block 6 on the clamping plate 5 is in the direction of the length of the T-beam 2. After the threaded rod 7 passes through the through hole of the two connecting blocks 6, it is fixed with a nut. The threaded rod 7 and the horizontal section of the two U-shaped rods 4 indirectly form a stable triangular structure to keep the clamping plate 5 attached to the beam rib. The threaded rod 7 only needs to open and maintain the distance of the clamping plate 5. Therefore, it is only necessary to set the nut on the threaded rod 7 at the position on the opposite side of the two connecting blocks 6 to meet the fixing requirements. The clamping plate 5 clamps the beam rib from both sides and fixes the T-beam 2 on the base 1.

[0037] The flange guard plate 8 is a U-shaped plate. During installation, it is fastened to both sides of the flange, enclosing the flange within the recessed space. The spacing between the upper and lower flange guard plates 8 can be selected according to the flange dimensions of the T-beam 2. Figure 5 As shown, the rope groove 9 on the outer side of the flange guard plate 8 is vertically continuous and its depth is sufficient to accommodate the wire rope 10. The wire rope 10 is confined and positioned in the rope groove 9, and at the same time, the wire rope 10 also makes the flange guard plate 8 tightly attached to the flange. The flange guard plate 8 prevents the wire rope 10 from directly contacting the flange of the T-beam 2 and causing edge damage, and also plays a role in fixing and straightening the flange. A wire rope 10 is connected to each side of the base 1. Both ends of the wire rope 10 are connected to the base 1, and the middle position of the wire rope 10 rests on the lifting beam 11. The wire rope 10 can be connected by setting a pull ring or hook on the base 1, or other connection methods with sufficient connection strength can be used. The two wire ropes 10 are of equal length to ensure that the base 1 is in a horizontal and balanced state.

[0038] When using this device to hoist T-beam 2, both ends of T-beam 2 are pre-erected on the beam transport vehicle or base. First, place the base 1 at the bottom of the beam rib of T-beam 2, rotate the U-shaped rod 4 of the beam rib clamp to clamp it towards the beam rib, and adjust the angle of the clamping plate 5 so that its inner side faces the beam rib until each clamping plate 5 is in contact with the side of the beam rib. On both sides of the beam rib, threaded rods 7 are passed through the through holes on the connecting blocks 6 of the two clamping plates 5, and locked with nuts to prevent relative sliding between the threaded rods 7 and the through holes; use flanges to protect... Plate 8 wraps around both sides of T-beam 2. The steel wire rope 10 connecting base 1 is pulled up and passed through the rope groove 9 of flange guard plate 8. The steel wire rope 10 is then suspended on the lifting beam 11 and the suspension point is adjusted to the balanced position of the device. Some structures can be set at the suspension point to limit the sliding displacement of the steel wire rope 10. After T-beam lifting devices are set at both ends of T-beam 2 in the same way, the T-beam 2 is lifted by the lifting device and slowly moved to the installation position. After T-beam 2 is installed, the steel wire rope 10, flange guard plate 8 and base 1 are removed.

[0039] This device supports the T-beam 2 using the base 1, avoiding the stress concentration problem caused by direct contact between the steel wire rope 10 and the beam ribs. It also protects the flange corners with flange guards 8, preventing damage to the corners of the T-beam 2 during hoisting. The beam rib clamps fix the T-beam 2 to the base 1, preventing the T-beam 2 from swaying on the base 1 and ensuring the stability and positioning accuracy of the T-beam 2 during hoisting. This makes construction safer and more efficient. The clamping plates 5 of the beam rib clamps are adjustable, and the clamping plates 5 can clamp beam ribs of different sizes. The angle is maintained by the threaded rod 7 to ensure that the clamping plates 5 do not detach.

[0040] In another technical solution, such as Figure 4 As shown, a pair of limiting grooves are provided at the bottom of the base 1 along the extension direction of the T-beam 2. Limiting rods 12 are engaged within these grooves, and both ends of the limiting rods 12 are fixedly connected to the ends of a steel wire rope 10. Openings for the steel wire rope 10 to pass through are provided at both ends of the limiting grooves. The limiting grooves are located at the bottom of the base 1 and extend to a length close to that of the base 1, allowing the steel wire rope 10 to connect to the base 1 without interfering with the groove 3 on the base 1. The steel wire rope 10 can be directly wound around the limiting rod 12 and secured with a rope buckle, or a sleeve can be provided on the limiting rod 12 to connect the steel wire rope 10. The corresponding positions within the limiting grooves have widened clearance space and openings for the steel wire rope 10 to pass through from the side of the base 1. When the steel wire rope 10 is pulled, the limiting rod 12 engages upwards in the limiting grooves, providing sufficient connection stability. The limiting rod 12 and the steel wire rope 10 can be quickly installed and removed, improving work efficiency.

[0041] like Figure 3As shown, the groove 3 on the base 1 is a rectangular groove that extends through both sides of the base 1 along the width direction of the T-beam 2. The rectangular groove extending through both sides provides ample space for the beam rib clamp to move, facilitating the observation and adjustment of the clamp's status by the operator. The base 1 with the rectangular groove has an arc-shaped plane, and the support surfaces at both ends can provide sufficient support for the T-beam 2.

[0042] The lifting beam 11 is an adjustable lifting beam 11, and multiple limiting posts are evenly spaced on its main beam. The wire rope 10 is suspended between the limiting posts on the main beam. When using this device to lift T-beams 2 with different flange widths, the position of the limiting posts on the wire rope 10 can be adjusted to ensure that the wire rope is at a suitable stress angle, thus ensuring high stability and reliability of the device when lifting T-beams 2 of different sizes.

[0043] In another technical solution, such as Figure 5 As shown, each flange guard plate 8 is provided with two rope grooves 9, which converge upwards and are arranged in a figure-eight shape. To ensure the stability of the support for the T-beam 2, the base 1 generally has a large length, and the connection position of the wire rope 10 on the base 1 also has a correspondingly large span. By providing upwardly converging rope grooves 9 on the flange guard plate 8, the wire rope 10 and the flange guard plate 8 have a better fit. The two rope grooves 9 are symmetrically distributed on the left and right and converge upwards. After passing through the rope grooves 9, the distance between the two wire ropes 10 can be shortened to adapt to the width of the lifting beam 11. After the wire rope 10 converges, its drooping angle under the lifting beam 11 is closer to vertical, which can reduce the swaying of the wire rope 10 under the lifting beam 11.

[0044] like Figure 1 and Figure 2 As shown, a detachable sub-plate 13 is provided on the outer side of the flange guard plate 8 to cover the rope groove 9. The sub-plate 13 fits against the outer side of the flange guard plate 8, and the two can be connected by a structure that facilitates disassembly, such as a slot fastener, bolt connection, or swivel joint with a buckle. When assembling the device before hoisting, the wire rope 10 is in a slack state. The sub-plate 13 is used to restrain the wire rope 10 in the rope groove 9 to prevent the wire rope 10 from falling off, improve installation efficiency, and prevent the wire rope 10 from accidentally detaching during the hoisting of the T-beam 2.

[0045] The outer side of the flange guard plate 8 is provided with clamps 14, and multiple clamps 14 limit and fix the sub-plate 13 from the left, right and bottom sides respectively. The clamping space of the clamps 14 is adapted to the thickness of the sub-plate 13. The sub-plate 13 is inserted from above for fixation. There is a clamp 14 on each of the left and right sides of the sub-plate 13 for limiting, and a clamp 14 on each of the two ends of the bottom side for support. It is very convenient to insert or remove the sub-plate 13 from above.

[0046] This application also provides a method for hoisting T-beams, using a T-beam hoisting device as provided in any of the above solutions, the method comprising the following steps:

[0047] S1: Place the base 1 at the bottom of the beam rib of the T beam 2, rotate the U-shaped rod 4 of the beam rib clamp and adjust the angle of the clamp 5 so that each clamp 5 fits the side of the beam rib. On both sides of the beam rib, threaded rods 7 pass through the through holes on the connecting blocks 6 of the two clamp 5 and lock them with nuts.

[0048] S2: Wrap the two sides of the T-beam 2 with the flange guard plate 8, pull up the steel wire rope 10 connecting the base 1 and pass it through the rope groove 9 of the flange guard plate 8, then suspend the steel wire rope 10 on the hanging beam 11 and adjust the suspension point to the balance position.

[0049] S3: After setting up T-beam 2 hoisting devices at both ends of T-beam 2 in the same way, use the hoisting device to lift and move T-beam 2 to the installation position. After installing T-beam 2, remove the wire rope 10, flange guard plate 8 and base 1.

[0050] This method uses a base 1 with a beam-rib clamp to support the T-beam 2, avoiding the stress concentration problem at the corners caused by direct contact between the steel wire rope 10 and the beam rib. Flange guards 8 protect the flange corners, preventing damage to the beam rib and flange corners of the T-beam 2 during hoisting. By using the beam-rib clamp to fix the T-beam 2 to the base 1, it prevents the T-beam 2 from swaying on the base 1, ensuring the stability and positioning accuracy of the T-beam 2 during hoisting, making construction safer and more efficient. Furthermore, the spacing of the clamping plates 5 in the beam-rib clamp is adjustable; for beam ribs of different sizes, the U-shaped rod 4 and clamping plates 5 can be adjusted to clamp the beam rib, and the threaded rod 7 maintains the angle to ensure that the clamping plates 5 do not detach. This method is applicable to the hoisting of T-beams 2 of different sizes without requiring replacement of the clamps.

[0051] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0052] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A T-beam hoisting device, characterized by comprising: The application relates to a T-beam hoisting device, which comprises the following parts: a base for supporting the beam rib of the T-beam, wherein the base is provided with a groove lower than the bottom of the beam rib; a beam rib clamp, which comprises U-shaped rods and clamping plates, the middle of a pair of the U-shaped rods is hinged in a scissors type structure and the hinge shaft is fixed to the bottom of the groove, the two ends of each of the U-shaped rods are rotatably connected with a clamping plate, the inner side of the clamping plate is attached to the beam rib, and the outer side of the clamping plate is provided with a connecting block with a through hole, the connecting blocks of the two clamping plates on one side of the beam rib are connected through the through holes by a threaded rod and are fixed by matched nuts; flange protection plates, which are a pair of U-shaped plates wrapped on the two sides of the flange of the T-beam respectively, and the outer side of the flange protection plate is provided with a rope groove; two sections of the rope grooves are arranged on each of the flange protection plates, and the two sections of the rope grooves are gathered upwards and arranged in an eight-character shape; at least two steel wires, the lower ends of the two steel wires are connected to the two sides of the base respectively, and the steel wires are suspended under the lifting beam of a lifting device after passing through the rope grooves upwards.

2. The T-beam hoisting device according to claim 1, characterized in that, A pair of limiting grooves are arranged on the bottom of the base along the extension direction of the T-beam, a limiting rod is clamped in the limiting groove, and the two ends of the limiting rod are fixedly connected with the two ends of one of the steel wires; openings are arranged at the two ends of the limiting groove for the steel wire to pass out.

3. The T-beam hoisting apparatus according to claim 1, wherein The groove on the base is a rectangular groove, and the groove penetrates through the two sides of the base along the width direction of the T-beam.

4. The T-beam hoisting apparatus according to claim 1, wherein The outer side of the flange protection plate is provided with a detachable auxiliary plate for covering the rope groove.

5. The T-beam hoisting apparatus of claim 4, wherein, The outer side of the flange protection plate is provided with a plate clamp, and a plurality of plate clamps are arranged on the left, right and lower sides of the auxiliary plate respectively to limit and fix the auxiliary plate.

6. The T-beam hoist device of claim 1, wherein, The lifting beam is an adjustable lifting beam, and a plurality of limiting columns are arranged on the lifting beam at equal intervals, and the steel wires are suspended between the limiting columns on the lifting beam.

7. A method of hoisting a T-beam, characterized in that The application discloses a T-beam hoisting device, and a hoisting method thereof. S1: placing the base on the bottom of the beam rib of the T-beam, rotating the U-shaped rods of the beam rib clamp and adjusting the angle of the clamping plates, so that each clamping plate is attached to the side surface of the beam rib, and the threaded rods are passed through the through holes on the connecting blocks of the two clamping plates on the two sides of the beam rib and are locked and fixed by nuts; S2: wrapping the T-beam on the two sides by the flange protection plates, pulling up the steel wires connected with the base, passing the steel wires through the rope grooves of the flange protection plates upwards, and then suspending the steel wires on the lifting beam and adjusting the suspension points to the balance position; S3: in the same way, arranging the T-beam hoisting device on the two ends of the T-beam, hoisting the T-beam by the lifting device and moving the T-beam to the installation position, and then removing the steel wires, the flange protection plates and the base after the T-beam is installed.

Images