A clamp for steel beam hoisting and a method of using the clamp

Abstract

The present invention relates to the technical field of construction equipment, and discloses a clamp for steel beam lifting and a method of using the same, comprising: a cross beam and a hook base; clamping mechanisms are symmetrically arranged at two ends of the bottom of the cross beam, a stabilizing mechanism is arranged between the clamping mechanisms, and a positioning mechanism is arranged at the upper end of the clamping mechanism; the clamping mechanism comprises two connecting arms connected to the bottom of the cross beam, a support frame arranged at the bottom of the connecting arms, and a sliding block arranged on the supporting frame and extending downward along the supporting frame, the two ends of the connecting arm are respectively connected to the bottom of the cross beam and the hinged seat at the top of the sliding block, the center of the supporting frame is provided with a slideway along its length direction, limiting grooves are arranged on both sides of the length direction of the supporting frame, a support plate is arranged on the inner side of the supporting frame, a plurality of connecting rods are connected between the support plates, sliding blocks are arranged on both sides of the sliding block, the sliding blocks are inserted into the limiting grooves, U-shaped clamps are symmetrically arranged at the bottom of the sliding block, a clamping space is formed between the two U-shaped clamps, and a pulley is arranged at the bottom of the U-shaped clamp.

Description

Technical Field

[0001] The invention relates to the technical field of construction equipment, and in particular to a clamp for steel beam hoisting and a use method thereof. Background Art

[0002] At present, as modern high-rise buildings develop towards multi-function and comprehensive use, the number of high-rise buildings with transfer layer design is increasing. Statistics show that about 80% of high-rise buildings have transfer layer structures, among which the structural construction of large-size transfer beams of beam-type transfer layers is the most critical; usually in construction projects, the structure has a large cross-section, the supporting system has high bearing capacity requirements, the load needs to be transferred to the lower layers, and the rigid steel beams are difficult to hoist, which becomes a difficulty in engineering construction.

[0003] Other similar technical solutions, such as the Chinese patent document "A prefabricated steel beam lifting device" with patent number: CN202011023169.0, solves the problem that the calculation and drawing of the welding lifting ear plates and the docking clamps waste the working time of designers and reduce work efficiency. Therefore, it is necessary to make improvements on this basis, and the comparative example points out that "it includes a steel beam, a steel column and a lifting fixture, the lifting fixture is connected to the upper flange plate of the steel beam, and also includes a lifting assembly and a positioning clamp, the positioning clamp and the lifting assembly are respectively detachably connected to the upper flange plate of the steel beam; ... The positioning clamp is installed between the upper flange plate of the steel beam and the upper flange plate of the steel column, and is fixed to the upper flange plate of the steel beam, so that the upper flange plate of the steel beam is flush with the upper flange plate of the steel column, so that the steel beam and the steel column are connected relative to each other; the lifting assembly is fixed to the upper flange plate of the steel beam, and the lifting device and the lifting assembly are movably coordinated to lift the steel beam. This patent is based on the similar large-section rigid concrete beam type steel beam lifting and installation structure. When in use, the adjustable effect is still poor, and the bolts need to be adjusted frequently. The operation is cumbersome, the lifting structure is not easy to install and disassemble, and the lifting stability effect is not good, and there are certain safety hazards.

[0004] Other existing patent solutions, such as CN207726591U, discloses a continuous casting roller clamp, including a left clamp, a right clamp, a left connecting rod, a right connecting rod, an electric telescopic rod and a lifting ring, wherein the left connecting rod and the right connecting rod are connected to the lifting ring through a pin shaft, and the top and bottom ends of the electric telescopic rod are respectively provided with an upper fixing member and a lower fixing member; further comprising two groups of upper connecting blocks, two groups of lower connecting blocks and two groups of connecting spring groups, wherein the two groups of connecting spring groups are respectively provided at the top ends of the two groups of lower connecting blocks; further comprising a first fixing member and a second fixing member, wherein the first fixing member and the second fixing member They are respectively arranged on the left clamping jaw and the right clamping jaw; they also include a first buffer member and a second buffer member. This design realizes automatic clamping of the bottom roller-shaped member by pushing and moving in the vertical direction. This patent discloses a continuous casting roller clamp. This clamping mechanism can only realize the clamping of cylindrical and symmetrical workpieces. For the workpieces to be clamped, especially the special-shaped workpieces with different widths at both ends, it is impossible to effectively clamp both ends, because the narrower side has not yet contacted the clamping jaws, and the wider workpiece at the other end has been clamped in place. Based on the above problems, the present invention was born. Summary of the invention

[0005] The present application provides a clamp for steel beam lifting and a method of using the same, in order to solve the problems that special-shaped steel beam structures are difficult to clamp, the adjustable lifting effect is poor, the bolts need to be adjusted frequently, the operation is cumbersome, the lifting structure is difficult to install and disassemble, the lifting stability effect is poor, and there are certain safety hazards.

[0006] In order to solve the above technical problems, the present application provides a clamp for steel beam hoisting, comprising: a crossbeam and a hook base arranged at the top of the crossbeam; a balance block is arranged at the bottom center of the crossbeam, clamping mechanisms are symmetrically arranged at both ends of the bottom of the crossbeam, a stabilizing mechanism is arranged between the clamping mechanisms, and a positioning mechanism is arranged at the upper end of the clamping mechanism; the clamping mechanism comprises two connecting arms connected to the bottom of the crossbeam, a support frame arranged at the bottom of the connecting arm, and a slider arranged on the support frame and extending downward along the support frame, the two ends of the connecting arm are respectively connected to the hinge seats at the bottom of the crossbeam and the top of the slider, the center of the support frame is provided with a slideway along its length direction, and limited grooves are arranged on both sides of the length direction of the support frame, a support plate is arranged on the inner side of the support frame, a plurality of connecting rods are connected between the support plates, and slide plates are arranged on both sides of the slider, the slide plates are inserted into the limited grooves, and U-shaped clamps are symmetrically arranged at the bottom of the slider, a clamping space is formed between the two U-shaped clamps, and a pulley is arranged at the bottom of the U-shaped clamp.

[0007] In some embodiments of the present application, optical dimension measurement sensors are provided at the bottom of the two support frames, a pressure sensor is provided on any U-shaped clamp on the same side, and the connecting arm is designed to be electrically controlled and retractable. The electrically controlled retractable action of the connecting arm responds to the difference between the signals of the two optical dimension measurement sensors and the difference between the two pressure sensors.

[0008] In some embodiments of the present application, the positioning mechanism includes a reinforcement rod connected to the top of the beam and a telescopic rod arranged at the bottom of the reinforcement rod, the reinforcement rod is L-shaped, the telescopic rod passes through the beam in a vertical direction, and the bottom of the telescopic rod is connected to the support frame.

[0009] In some embodiments of the present application, the stabilizing mechanism includes a support plate arranged between the support frames, a pressure plate arranged at the bottom of the support plate, a first L-shaped plate arranged at both ends of the support plate in the length direction, a second L-shaped plate arranged at the lower end of the cross beam, a first piston cylinder arranged between the cross parts of the first L-shaped plate and the second L-shaped plate, a second piston cylinder vertically penetrated through the support plate, and a connecting tube connected between the first piston cylinder and the second piston cylinder, the cross parts of the first L-shaped plate and the second L-shaped plate are arranged at intervals up and down to form an extrusion chamber, the first piston cylinder is connected to the upper and lower ends of the extrusion chamber, a fixing sleeve is arranged on the connecting tube, the fixing sleeve extends upward and is connected to the balance block, and the bottom of the second piston cylinder is connected to the pressure plate, which is used to push the pressure plate to move up and down to fit the steel beam to be clamped.

[0010] In some embodiments of the present application, a support spring is provided in the slide, one end of the support spring is fixedly connected to the inner wall of the slide, and the other end of the support spring is fixedly connected to the slider.

[0011] In some embodiments of the present application, the telescopic rod includes a sleeve connected to the reinforcement rod and a sliding rod inserted into the sleeve, and the telescopic rod is freely retractable and is used to limit the position and movement direction of the support frame.

[0012] In some embodiments of the present application, the hook base is arranged at the center position of the top of the beam, a plurality of reinforcement blocks are evenly spaced on both sides of the hook base, and two lifting rings are symmetrically arranged on both sides of the top of the hook base.

[0013] In some embodiments of the present application, a method for using a steel beam lifting fixture comprises the following specific steps:

[0014] A. When using this device, connect the lifting ring on the hook base through the crane, drive the device as a whole to the top of the I-shaped steel beam, and make contact with the steel beam, and then use the crane to lower the device as a whole;

[0015] B. After the pulley at the bottom of the U-shaped clamp contacts the I-shaped steel beam, the gravity of the crossbeam presses down to drive the four connecting arms to rotate, so that the corresponding two connecting arms drive the two sliders and the slide plate, so that the two slides drive the two U-shaped clamps to move away from each other. At this time, the pulley at the bottom of the U-shaped clamp slides on the top of the I-shaped steel beam. When the pulley is separated from the top of the I-shaped steel beam, the four U-shaped clamps move downward and are located on the front and rear sides of the I-shaped steel beam. They are supported by four support springs and the slide plate, so that the four U-shaped clamps clamp the I-shaped steel beam.

[0016] C. When lifting the I-beam, the crane pulls the hook base, so that the hook base pulls the crossbeam upward, and the crossbeam pulls the four connecting arms, so that the corresponding two U-shaped clamps lift the I-beam, and the angle between the connecting arms becomes smaller, so that the corresponding two slides are tightened, and the two U-shaped clamps are close to each other, so that the U-shaped clamps clamp the I-beam. During the clamping process, the angle between the two connecting arms at the wider width end is controlled to become larger, and the angle between the two connecting arms at the narrower width end is controlled to become smaller, until the digital difference displayed by the two pressure sensors is zero, and then the electric control telescopic drive power of all connecting arms is disconnected;

[0017] D. When the crossbeam moves upward, it drives the two second L-shaped plates and the two first piston cylinders to move upward. Since the support frame remains stationary during the rotation of the connecting arm, the first push plate connected to the support plate contacts and squeezes the first piston cylinder. The gas in the first piston cylinder is compressed and enters the second piston cylinder through the connecting pipe. The second piston cylinder is pressurized and stretches, so that the four second piston cylinders drive the pressure plates to move downward and contact closely with the I-beam, thereby further limiting the position of the I-beam.

[0018] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0019] (1) In the present invention, two optical size sensors, a pressure sensor and two sets of electrically controlled retractable connecting arms are used to stably clamp steel beams of uniform width or steel beams of different widths in the length direction;

[0020] (2) During the lifting work of the present invention, the crane is connected to the hook base, driving the clamp to the top of the I-shaped steel beam and contacting the steel beam. After the four pulleys contact the I-shaped steel beam, the gravity of the crossbeam presses down to drive the four connecting arms to rotate, so that the corresponding two connecting arms support the two slides, and the two slides drive the two clamps to move away from each other. At this time, the pulley at the bottom of the clamp slides on the top of the I-shaped steel beam. After the pulley is separated from the top of the I-shaped steel beam, the four clamps move downward, and then the four support springs and the slide are supported to enable the four clamps to clamp the I-shaped steel beam. The crane further pulls the hook base to The hook base pulls the crossbeam to move upward, and the crossbeam pulls the four connecting arms, so that the corresponding two clamps lift the I-shaped steel beam. Since the connecting arms are connected by the pin shaft, the corresponding two slide plates tighten the two clamps, so that the clamps clamp the I-shaped steel beam. Compared with the method of frequently adjusting the bolts, this scheme directly presses down the support frame and supports and cooperates with the elastic parts, which is convenient for clamping the I-shaped steel beam. At the same time, by pulling the hook base, multiple connecting arms pull the slide plates and clamps to further clamp the I-shaped steel beam, which is convenient for disassembling and assembling the I-shaped steel beam, while improving its hoisting stability, which is beneficial to the hoisting work of the I-shaped steel beam.

[0021] (3) In the lifting operation of the embodiment of the present invention, during the upward movement of the cross beam, the cross beam drives the two second push plates and the two first piston cylinders to move upward. Since the support frame remains stationary during the rotation of the connecting arm, the first push plate connected to the support frame contacts and squeezes the first piston cylinder. The gas in the first piston cylinder is compressed and enters the second piston cylinder through the connecting pipe. The second piston cylinder is pressurized and stretches, so that the four second piston cylinders drive the pressure plates to move downward and come into close contact with the I-beam, further limiting the position of the I-beam. While the I-beam is clamped by the clamping jaws, since one side of the clamping jaws is concave, the second piston cylinder drives the pressure plates to squeeze the top of the I-beam, thereby achieving the purpose of limiting the position of the I-beam in multiple directions, further improving the safety of lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0023] Figure 2 is a bottom view schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of a support frame according to an embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the stabilizing mechanism according to an embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the clamping mechanism according to an embodiment of the present invention;

[0027] Figure 6 It is a cross-sectional schematic diagram of the clamping mechanism according to an embodiment of the present invention.

[0028] In the figure, 100, beam; 110, balance block; 120, reinforcement block; 200, hook base; 210, lifting ring; 300, clamping mechanism; 310, connecting arm; 320, supporting frame; 321, slideway; 322, limiting groove; 323, support plate; 324, connecting rod; 330, slider; 340, hinged seat; 350, slide plate; 360, U-shaped clamp; 370, pulley; 3 80. Electric-controlled telescopic rod; 390. Support spring; 400. Stabilizing mechanism; 410. Support plate; 420. Pressing plate; 430. First L-shaped plate; 440. Second L-shaped plate; 450. First piston cylinder; 460. Second piston cylinder; 470. Connecting pipe; 480. Fixing sleeve; 500. Positioning mechanism; 510. Reinforcement rod; 520. Telescopic rod; 521. Sleeve; 522. Sliding rod. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] like Figure 1-6 As shown, according to some embodiments of the present application, a fixture for steel beam lifting includes: a crossbeam 100 and a hook base 200 arranged on the top of the crossbeam 100; a balance block 110 is arranged at the bottom center of the crossbeam 100, clamping mechanisms 300 are symmetrically arranged at both ends of the bottom of the crossbeam 100, a stabilizing mechanism 400 is arranged between the clamping mechanisms 300, and a positioning mechanism 500 is arranged at the upper end of the clamping mechanism 300; the clamping mechanism 300 includes two connecting arms 310 connected to the bottom of the crossbeam 100, a support frame 320 arranged at the bottom of the connecting arm 310, and a slider 300 arranged on the support frame 320 and extending downward along the support frame 320. 30, the two ends of the connecting arm 310 are respectively connected to the hinge seat 340 at the bottom of the beam 100 and the top of the slider 330, a slideway 321 is arranged at the center of the support frame 320 along its length direction, and limiting grooves 322 are arranged on both sides of the length direction of the support frame 320, a support plate 323 is arranged on the inner side of the support frame 320, and a plurality of connecting rods 324 are connected between the support plates 323, slide plates 350 are arranged on both sides of the slider 330, and the slide plates 350 are inserted into the limiting grooves 322, and U-shaped clamps 360 are symmetrically arranged at the bottom of the slider 330, a clamping space is formed between the two U-shaped clamps 360, and a pulley 370 is arranged at the bottom of the U-shaped clamp 360.

[0034] It should be noted here that there are four connecting arms 310, and the top ends of the two connecting arms 310 on the same side are hinged to the bottom of the beam 100. There are four U-shaped clamps 360, which are all connected to the lower ends of the corresponding connecting arms 310 through pins. One side of the bottom of the U-shaped clamp 360 is inclined to facilitate the U-shaped clamp 360 to slide along the top of the I-beam.

[0035] According to some embodiments of the present application, optical dimension measurement sensors are provided at the bottom of the two support frames 320, a pressure sensor is provided on any U-shaped clamp 360 on the same side, and an electrically-controlled telescopic rod 380 is provided between the connecting arms 310 on the same side. The electrically-controlled telescopic action of the electrically-controlled telescopic rod 380 responds to the difference between the signals of the two optical dimension measurement sensors and the difference between the two pressure sensors.

[0036] It should be noted here that the pressure sensor is used to measure the pressure between the U-shaped clamp 360 and the I-shaped steel beam, and the optical dimension measurement sensor measures the distance between the U-shaped clamp 360 and the I-shaped steel beam. When the widths at both ends of the I-shaped steel beam are inconsistent, the angle between the connecting arms 310 on the same side is changed by driving the electrically controlled telescopic rod 380 to change the distance between the U-shaped clamps 360 to clamp the I-shaped steel beam.

[0037] According to some embodiments of the present application, the positioning mechanism 500 includes a reinforcement rod 510 connected to the top of the beam 100 and a telescopic rod 520 arranged at the bottom of the reinforcement rod 510, the reinforcement rod 510 is L-shaped, the telescopic rod 520 penetrates the beam 100 in the vertical direction, and the bottom of the telescopic rod 520 is connected to the support frame 320.

[0038] like Figure 1 and Figure 4 As shown, according to some embodiments of the present application, the stabilizing mechanism 400 includes a support plate 410 arranged between the support frames 320, a pressure plate 420 arranged at the bottom of the support plate 410, a first L-shaped plate 430 arranged at both ends of the support plate 410 in the length direction, a second L-shaped plate 440 arranged at the lower end of the beam 100, a first piston cylinder 450 arranged between the transverse parts of the first L-shaped plate 430 and the second L-shaped plate 440, a second piston cylinder 460 vertically penetrated through the support plate 410, and a connecting pipe 470 connected between the first piston cylinder 450 and the second piston cylinder 460, the transverse parts of the first L-shaped plate 430 and the second L-shaped plate 440 are arranged at intervals up and down to form an extrusion chamber, the first piston cylinder 450 is connected to the upper and lower ends of the extrusion chamber, a fixing sleeve 480 is arranged on the connecting pipe 470, the fixing sleeve 480 extends upward and is connected to the balancing block 110, and the bottom of the second piston cylinder 460 is connected to the pressure plate 420, which is used to push the pressure plate 420 to move up and down to fit the steel beam to be clamped.

[0039] It should be noted that a plurality of through holes are provided on the support plate 410 , and the plurality of through holes are arranged opposite to the second piston cylinder 460 . The second piston cylinder 460 passes through the through holes and is fixedly connected to the pressure plate 420 .

[0040] According to some embodiments of the present application, a support spring 390 is disposed in the slide 321 , one end of the support spring 390 is fixedly connected to the inner wall of the slide 321 , and the other end of the support spring 390 is fixedly connected to the slider 330 .

[0041] According to some embodiments of the present application, the telescopic rod 520 includes a sleeve 521 connected to the reinforcement rod 510 and a sliding rod 522 inserted into the sleeve 521. The telescopic rod 520 is freely retractable and is used to limit the position and movement direction of the support frame 320.

[0042] It should be noted that two limit plates extend outwardly from both sides of the crossbeam 100 in the length direction, and the sleeve 521 passes through the limit plates in the vertical direction.

[0043] According to some embodiments of the present application, the hook base 200 is arranged at the top center position of the beam 100, and multiple reinforcement blocks 120 are evenly spaced on both sides of the hook base 200, and two rings 210 are symmetrically arranged on both sides of the top of the hook base 200.

[0044] According to some embodiments of the present application, a method for using a steel beam lifting fixture comprises the following specific steps:

[0045] A. When using the device, the hoist is connected to the lifting ring 210 on the hook base 200 by a crane, and the device is driven to the top of the I-shaped steel beam and in contact with the steel beam, and then the device is lowered by the crane;

[0046] B. After the pulley 370 at the bottom of the U-shaped clamp 360 contacts the I-shaped steel beam, the gravity of the crossbeam 100 presses down to drive the four connecting arms 310 to rotate, so that the corresponding two connecting arms 310 drive the two sliders 330 and the slide plate 350, so that the two slides 330 drive the two U-shaped clamps 360 to move away from each other. At this time, the pulley 370 at the bottom of the U-shaped clamp 360 slides on the top of the I-shaped steel beam. When the pulley 370 is separated from the top of the I-shaped steel beam, the four U-shaped clamps 360 move downward and are located at the front and rear sides of the I-shaped steel beam. They are supported by four support springs 390 and the slide plate 350, so that the four U-shaped clamps 360 clamp the I-shaped steel beam.

[0047] C. When lifting the I-beam, the crane pulls the hook base 200, so that the hook base 200 pulls the crossbeam 100 to move upward, and the crossbeam 100 pulls the four connecting arms 310, so that the corresponding two U-shaped clamps 360 lift the I-beam, and the angle between the connecting arms 310 becomes smaller, so that the corresponding two slides 350 are tightened, and the two U-shaped clamps 360 are close to each other, so that the U-shaped clamps 360 clamp the I-beam. During the clamping process, according to the difference in width at both ends of the I-beam obtained by the signals of the two optical size measurement sensors, the angle between the two connecting arms 310 at the wider width end is controlled to become larger, and the angle between the two connecting arms 310 at the narrower width end is controlled to become smaller, until the digital difference displayed by the two pressure sensors is zero, and then the electric control telescopic drive power of all connecting arms 310 is disconnected;

[0048] D. When the crossbeam 100 moves upward, the crossbeam 100 drives the two second L-shaped plates 440 and the two first piston cylinders 450 to move upward. Since the support frame 320 remains stationary during the rotation of the connecting arm 310, the first push plate connected to the support plate 410 contacts and squeezes the first piston cylinder 450. The gas in the first piston cylinder 450 is compressed and enters the second piston cylinder 460 through the connecting pipe 470. The second piston cylinder 460 is pressurized and stretches, so that the four second piston cylinders 460 drive the pressure plate 420 to move downward and contact closely with the I-beam, thereby further limiting the position of the I-beam.

[0049] In summary, the present invention relates to the technical field of construction equipment, and discloses a clamp for lifting steel beams and a method for using the clamp, comprising: a crossbeam and a hook base; clamping mechanisms are symmetrically arranged at both ends of the bottom of the crossbeam, a stabilizing mechanism is arranged between the clamping mechanisms, and a positioning mechanism is arranged at the upper end of the clamping mechanism; the clamping mechanism comprises two connecting arms connected to the bottom of the crossbeam, a support frame arranged at the bottom of the connecting arms, and a slider arranged on the support frame and extending downward along the support frame, the two ends of the connecting arm are respectively connected to the bottom of the crossbeam and the top of the slider, a slideway is arranged at the center of the support frame along its length direction, limiting grooves are arranged on both sides of the length direction of the support frame, a support plate is arranged on the inner side of the support frame, a plurality of connecting rods are connected between the support plates, slide plates are arranged on both sides of the slide plate, the slide plates are inserted into the limiting grooves, U-shaped clamps are symmetrically arranged at the bottom of the slide plate, a clamping space is formed between the two U-shaped clamps, and a pulley is arranged at the bottom of the U-shaped clamp.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A fixture for lifting a steel beam, comprising: A crossbeam (100) and a hook base (200) arranged on the top of the crossbeam (100); characterized in that a balance block (110) is arranged at the bottom center of the crossbeam (100), clamping mechanisms (300) are symmetrically arranged at both ends of the bottom of the crossbeam (100), a stabilizing mechanism (400) is arranged between the clamping mechanisms (300), and a positioning mechanism (500) is arranged at the upper end of the clamping mechanism (300); the clamping mechanism (300) includes two connecting arms (310) connected to the bottom of the crossbeam (100), a support frame (320) arranged at the bottom of the connecting arm (310), and a slider (330) arranged on the support frame (320) and extending downward along the support frame (320), the The two ends of the connecting arm (310) are respectively connected to the bottom of the crossbeam (100) and the hinge seat (340) at the top of the slider (330); a slideway (321) is arranged at the center of the support frame (320) along its length direction; limiting grooves (322) are arranged on both sides of the support frame (320) in the length direction; a support plate (323) is arranged on the inner side of the support frame (320); a plurality of connecting rods (324) are connected between the support plates (323); slide plates (350) are arranged on both sides of the slider (330); the slide plates (350) are inserted into the limiting grooves (322); a U-shaped clamp (360) is symmetrically arranged at the bottom of the slider (330); a clamping space is formed between the two U-shaped clamps (360); and the U-shaped A pulley (370) is provided at the bottom of the clamp (360), an optical size measurement sensor is provided at the bottom of the two support frames (320), a pressure sensor is provided on any U-shaped clamp (360) on the same side, an electric-controlled telescopic rod (380) is provided between the connecting arms (310) on the same side, and the electric-controlled telescopic action of the electric-controlled telescopic rod (380) responds to the difference between the signals of the two optical size measurement sensors and the difference between the two pressure sensors, and the positioning mechanism (500) comprises a reinforcement rod (510) connected to the top of the beam (100) and a telescopic rod (520) provided at the bottom of the reinforcement rod (510), the reinforcement rod (510) is L-shaped, and the telescopic rod (520) penetrates the beam in the vertical direction. The crossbeam (100) is a crossbeam (100), the bottom of the telescopic rod (520) is connected to the support frame (320), the stabilizing mechanism (400) comprises a support plate (410) arranged between the support frames (320), a pressure plate (420) arranged at the bottom of the support plate (410), a first L-shaped plate (430) arranged at both ends of the support plate (410) in the length direction, a second L-shaped plate (440) arranged at the lower end of the crossbeam (100), a first piston cylinder (450) arranged between the transverse parts of the first L-shaped plate (430) and the second L-shaped plate (440), a second piston cylinder (460) vertically penetrating the support plate (410), and a connecting pipe (470) connected between the first piston cylinder (450) and the second piston cylinder (460),The transverse parts of the first L-shaped plate (430) and the second L-shaped plate (440) are arranged at intervals up and down to form an extrusion chamber. The first piston cylinder (450) is connected to the upper and lower ends of the extrusion chamber. The connecting pipe (470) is provided with a fixing sleeve (480), and the fixing sleeve (480) extends upward and is connected to the balance block (110). The bottom of the second piston cylinder (460) is connected to the pressing plate (420) for pushing the pressing plate (420) to move up and down to fit the steel beam to be clamped. A support spring (390) is provided in the slideway (321), and one end of the support spring (390) is fixedly connected to the inner wall of the slideway (321), and the other end of the support spring (390) is fixedly connected to the slider (330).

2. The fixture for steel beam hoisting according to claim 1, characterized in that: The telescopic rod (520) comprises a sleeve (521) connected to the reinforcement rod (510) and a sliding rod (522) plugged into the sleeve (521); the telescopic rod (520) is freely retractable and is used to limit the position and movement direction of the support frame (320).

3. The fixture for steel beam hoisting according to claim 1, characterized in that: The hook base (200) is arranged at the center of the top of the beam (100), a plurality of reinforcement blocks (120) are evenly spaced on both sides of the hook base (200), and two lifting rings (210) are symmetrically arranged on both sides of the top of the hook base (200).

4. A method for using the fixture for steel beam hoisting according to any one of claims 1 to 3, characterized in that: The specific steps are as follows: A. When using the device, the hoist is connected to the lifting ring (210) on the hook base (200) by a crane, and the device is driven to the top of the I-shaped steel beam and in contact with the steel beam, and then the device is lowered by the crane; B. After the pulley (370) at the bottom of the U-shaped clamp (360) contacts the I-shaped steel beam, the gravity of the crossbeam (100) pushes down and drives the four connecting arms (310) to rotate, so that the corresponding two connecting arms (310) drive the two sliders (330) and the slide plate (350), so that the two slides (330) drive the two U-shaped clamps (360) to move away from each other. At this time, the pulley (370) at the bottom of the U-shaped clamp (360) slides on the top of the I-shaped steel beam. When the pulley (370) is separated from the top of the I-shaped steel beam, the four U-shaped clamps (360) move downward and are located at the front and rear sides of the I-shaped steel beam. They are supported by four support springs (390) and the slide plate (350), so that the four U-shaped clamps (360) clamp the I-shaped steel beam; C. When lifting the I-shaped steel beam, the crane pulls the hook base (200), so that the hook base (200) pulls the crossbeam (100) to move upward, and the crossbeam (100) pulls the four connecting arms (310), so that the corresponding two U-shaped clamps (360) lift the I-shaped steel beam, and the angle between the connecting arms (310) becomes smaller, so that the corresponding two slide plates (350) are tightened, and the two U-shaped clamps (360) are close to each other, so that the U-shaped clamps (360) clamp the I-shaped steel beam. During the clamping process, according to the difference in width between the two ends of the I-shaped steel beam obtained by the signals of the two optical size measurement sensors, the angle between the two connecting arms (310) at the wider width end is controlled to become larger, and the angle between the two connecting arms (310) at the narrower width end is controlled to become smaller, until the digital difference displayed by the two pressure sensors is zero, and then the electric control telescopic drive power of all the connecting arms (310) is disconnected; D. When the cross beam (100) moves upward, the cross beam (100) drives the two second L-shaped plates (440) and the two first piston cylinders (450) to move upward. Since the support frame (320) remains stationary during the rotation of the connecting arm (310), the first push plate connected to the support plate (410) contacts the first piston cylinder (450) and squeezes the first piston cylinder (450). After the gas in the first piston cylinder (450) is compressed, it enters the second piston cylinder (460) through the connecting pipe (470). After the second piston cylinder (460) is pressurized, it stretches, so that the four second piston cylinders (460) drive the pressure plate (420) to move downward and come into close contact with the I-shaped steel beam, thereby further limiting the position of the I-shaped steel beam.

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