CN115196494A - A fixture for hoisting steel beams and method of using the same - Google Patents

Abstract

The invention relates to the technical field of construction equipment, and discloses a clamp for hoisting a steel beam and a method for using the same, comprising: a beam and a hook base; two ends of the bottom of the beam are symmetrically provided with clamping mechanisms, and between the clamping mechanisms A stabilizing mechanism is arranged, and a positioning mechanism is arranged on the upper end of the clamping mechanism; the clamping mechanism includes two connecting arms connected to the bottom of the beam, a support frame arranged at the bottom of the connecting arms, and a support frame 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 seat at the bottom of the beam and the top of the slider, the center of the support frame is provided with a slideway along its length direction, and the two sides of the support frame in the length direction are provided with limit grooves. A support plate is arranged on the inner side, a plurality of connecting rods are connected between the support plates, a slide plate is arranged on both sides of the slider, the slide plate is inserted into the limit groove, and a U-shaped clamp is symmetrically arranged at the bottom of the slider, and two U-shaped clamps are arranged. A clamping space is formed between, and the bottom of the U-shaped clamp is provided with a pulley.

Description

A fixture for hoisting steel beams and method of using the same

technical field

The invention relates to the technical field of construction equipment, in particular to a clamp for hoisting a steel beam and a method of using the same.

Background technique

At present, with the development of modern high-rise buildings to be more multi-functional and comprehensive, 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 beam-type transfer layers are used. The structural construction of large-scale conversion beams is the most critical; usually in construction projects, the structure has a large cross-section, the bearing capacity of the support system is high, the load needs to be transferred down to multiple layers, and the hoisting of stiff steel beams is difficult, which has become a difficulty in engineering construction.

Other similar technical solutions, such as the Chinese patent document "An Assembled Steel Beam Hoisting Device", the patent number is: CN202011023169.0, the patent solves the calculation, drawing and other work considering the welding hoisting lugs and the docking clips, which is wasteful The working time of designers reduces the problem of work efficiency. Therefore, it is necessary to improve on this basis, and it is pointed out in the comparative example that "including steel beams, steel columns and spreaders, the spreaders are related to the upper flange plate of the steel beam. The connection also includes hoisting components and positioning clips. The positioning clips and the hoisting components are respectively detachably connected to the upper flange plate of the steel beam; the positioning clip is installed between the upper flange plate of the steel beam and the upper flange plate of the steel column, and fixed to the steel beam. The upper flange plate of the beam, so that the upper flange plate of the steel beam is flush with the upper flange plate of the steel column, so as to realize the connection between the steel beam and the steel column; hoisting”, this patent is based on the similar large-section rigid concrete beam-shaped steel beam hoisting into place and the installation structure is in use, the adjustment effect is still poor, the method of frequent adjustment of bolts is required, the operation is cumbersome, and the hoisting structure is installed and disassembled. At the same time, the effect of hoisting and stabilization is not good, and there are certain safety hazards.

Among other existing patent solutions, for example, CN207726591U discloses a continuous casting roll clamp, which includes a left jaw, a right jaw, a left connecting rod, a right connecting rod, an electric telescopic rod and a lifting ring, and the left connecting rod and the right connecting rod pass through. The pin shaft is connected with the hoisting ring, and the top and bottom ends of the electric telescopic rod are respectively provided with an upper fixing piece and a lower fixing piece; it also includes two sets of upper connecting blocks, two sets of lower connecting blocks and two sets of connecting spring sets, and the two sets of connecting spring sets are respectively It is arranged on the top end of the two sets of lower connecting blocks; it also includes a first fixing piece and a second fixing piece, the first fixing piece and the second fixing piece are respectively arranged on the left and right claws; Two buffer parts, this design realizes the automatic clamping of the bottom roll-shaped parts through the vertical pushing movement. This patent discloses a continuous casting roll clamp, and this clamping mechanism can only realize a cylindrical and symmetrical workpiece clamp. For I-shaped clamping workpieces, especially special-shaped I-shaped workpieces with different widths at both ends, it cannot be effectively clamped at both ends, because the narrower side has not been in contact with the jaws, and the wider side of the other end The workpiece has been clamped in place, and based on the above problems, the present invention was born.

SUMMARY OF THE INVENTION

The present application provides a clamp for hoisting steel beams and a method of using the same, so as to solve the problems that the special-shaped steel beam structure is difficult to clamp, the adjustable effect of hoisting is poor, the bolts need to be adjusted frequently, the operation is cumbersome, and the hoisting structure It is not easy to install and disassemble, and at the same time, the effect of hoisting and stabilization is not good, and there are certain safety hazards.

In order to solve the above technical problems, the present application provides a fixture for hoisting a steel beam, comprising: a beam and a hook base arranged on the top of the beam; a balance block is provided at the bottom center of the beam, and the beam A clamping mechanism is arranged symmetrically at both ends of the bottom of the beam, a stabilization mechanism is arranged between the clamping mechanisms, and a positioning mechanism is arranged at the upper end of the clamping mechanism; the clamping mechanism includes two connecting arms connected to the bottom of the beam, 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 seat at the bottom of the beam and the top of the slider, the support frame The center of the support frame is provided with a slide along its length direction, the two sides of the support frame are provided with limit grooves, the inner side of the support frame is provided with a support plate, and a plurality of connecting rods are connected between the support plates. A slide plate is arranged on both sides, the slide plate is inserted into the limit slot, a U-shaped clamp is symmetrically arranged at the bottom of the slider, a clamping space is formed between the two U-shaped clamps, and the bottom of the U-shaped clamp is provided with a U-shaped clamp. pulley.

In some embodiments of the present application, the bottoms of the two support frames are provided with optical size measurement sensors, and the optical size measurement sensors are used for a pressure sensor on any U-shaped clamp on the same side, and the connecting arm For the electronically controlled telescopic design, the electronically controlled telescopic action of the connecting arm is responsive to the difference between the signals of the two optical dimension measuring sensors and the difference between the two pressure sensors.

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, and the telescopic rod penetrates the beam in the vertical direction, so The bottom of the telescopic rod is connected to the support frame.

In some embodiments of the present application, the stabilizing mechanism includes a support plate disposed between the support frames, a pressure plate disposed at the bottom of the support plate, a first L-shaped plate disposed at both ends of the support plate in the length direction, and a plate disposed at the lower end of the beam. The second L-shaped plate, the first piston cylinder disposed between the first L-shaped plate and the transverse portion of the second L-shaped plate, the second piston cylinder vertically penetrated through the support plate, and the first piston cylinder and the The connecting pipe between the second piston cylinders, the transverse parts of the first L-shaped plate and the second L-shaped plate are spaced up and down to form an extrusion cavity, and the first piston cylinder is connected to the upper and lower ends of the extrusion cavity, The connecting pipe is provided with a fixing sleeve, the fixing sleeve is upwardly extended and connected to the balance block, and the bottom of the second piston cylinder is connected to the pressing plate for pushing the pressing plate to move up and down to fit the steel beam to be clamped.

In some embodiments of the present application, a support spring is disposed in the slideway, one end of the support spring is fixedly connected to the inner wall of the slideway, and the other end of the support spring is fixedly connected to the slider.

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

In some embodiments of the present application, the hook base is arranged at the center of the top of the beam, two sides of the hook base are evenly spaced with a plurality of reinforcing blocks, and two sides of the top of the hook base are symmetrically arranged on both sides. rings.

In some embodiments of the present application, a method of using a steel beam hoisting fixture, the specific steps are as follows:

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

B. After the pulley at the bottom of the U-shaped clamp contacts the I-shaped steel beam, the four connecting arms are driven to rotate by the gravity of the beam, so that the corresponding two connecting arms drive the two sliders and the sliding plate, so that the two sliders drive The two U-shaped clamps are far away from each other. At this time, the pulleys at the bottom of the U-shaped clamps slide on the top of the I-shaped steel beam. The front and rear sides of the shaped steel beam are supported by four support springs and slide plates, so that the four U-shaped clamps can clamp the I-shaped steel beam;

C. When lifting the I-shaped steel beam, the crane pulls the hook base, so that the hook base pulls the beam to move upward, and the beam pulls the four connecting arms, so that the corresponding two U-shaped clamps can hoist the I-shaped steel beam. The angle between the connecting arms becomes smaller, the corresponding two sliding plates are tightened, and the two U-shaped clamps are close to each other, so that the U-shaped clamps clamp the I-shaped steel beam, and the sensor is measured according to the two optical dimensions during the clamping process. The difference between the widths of the two ends of the I-shaped steel beam obtained by the signal controls the angle between the two connecting arms at the wider end to become larger, and the angle between the two connecting arms at the narrower end becomes smaller. Until the digital difference displayed by the two pressure sensors is zero, disconnect the electric control telescopic drive power of all connecting arms;

D. During the upward movement of the beam, the beam 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 The first push plate is in contact with the first piston cylinder and squeezes the first piston cylinder. After the gas in the first piston cylinder is compressed, it enters the second piston cylinder through the connecting pipe, and the second piston cylinder is pressurized to make it elongated. The four second piston cylinders drive the pressure plate to move downward and are in close contact with the I-shaped steel beam to further limit the position of the I-shaped steel beam.

Compared with the prior art, the present invention has the following features and beneficial effects:

(1) In the present invention, through two optical size sensors, pressure sensors and two sets of electrically controlled telescopic connecting arms, steel beams with uniform width or steel beams with different widths in the length direction can be stably clamped;

(2) In the hoisting work of the present invention, the hoist is connected to the hook base, drives the fixture to the top of the I-shaped steel beam and contacts the steel beam, and the four pulleys pass the gravity of the beam after contacting the I-shaped steel beam. Pressing down drives the four connecting arms to rotate, so that the corresponding two connecting arms support two sliding plates, so that the two sliding plates drive the two clamping jaws away from each other. At this time, the pulley at the bottom of the clamping jaw slides on the top of the I-shaped steel beam, and the pulley After being separated from the top of the I-shaped steel beam, the four gripping claws move downward, and then are supported by four support springs and the slide plate, so that the four gripping claws can clamp the I-shaped steel beam, and further the crane pulls the hook The base makes the hook base pull the beam to move upward, and the beam pulls the four connecting arms, so that the corresponding two clamping jaws can lift the I-shaped steel beam. Because the connecting arms are connected by the pin shaft, the corresponding two sliding plates can tighten the two clamps. Claws, so that the clamping jaws clamp the I-shaped steel beam. Compared with the method of frequently adjusting the bolts, this solution directly presses the support frame and cooperates with the support of the elastic member, which is convenient for clamping the I-shaped steel beam at the same time. By pulling the hook base, the multiple connecting arms pull the slide plate and the clamping jaws to further clamp the I-shaped steel beam, which facilitates the disassembly and assembly of the I-shaped steel beam and improves its hoisting stability, which is beneficial to the I-shaped steel beam. Lifting of steel beams;

(3) During the lifting work of the embodiment of the present invention, during the upward movement of the beam, the beam drives the two second push plates and the two first piston cylinders to move upward. Do not move, make the first push plate connected on the support frame contact the first piston cylinder and squeeze 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 After the inner pressure is filled, it is extended, so that the four second piston cylinders drive the pressure plate to move down and are in close contact with the I-shaped steel beam, which further limits the I-shaped steel beam. At the same time, due to the concave design of one side of the clamping jaw, the second piston cylinder drives the pressure plate to squeeze the top of the I-beam, realizing the purpose of limiting the position of the I-beam in multiple directions, and further improving the safety of hoisting.

Description of drawings

1 is a schematic diagram of a three-dimensional structure of an embodiment of the present invention;

2 is a schematic bottom view of a three-dimensional structure according to an embodiment of the present invention;

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

4 is a schematic three-dimensional structure diagram of a stabilization mechanism according to an embodiment of the present invention;

5 is a schematic three-dimensional structural diagram of a clamping mechanism according to an embodiment of the present invention;

6 is a schematic cross-sectional view of a clamping mechanism according to an embodiment of the present invention.

In the figure, 100, beam; 110, balance block; 120, reinforcing block; 200, hook base; 210, lifting ring; 300, clamping mechanism; 310, connecting arm; 320, support frame; 321, slideway; 322, Limit slot; 323, support plate; 324, connecting rod; 330, slider; 340, hinged seat; 350, slide plate; 360, U-shaped clamp; 370, pulley; 380, electronically controlled telescopic rod; 390, support spring; 400, stabilization 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; 480 500, positioning mechanism; 510, reinforcing rod; 520, telescopic rod; 521, casing; 522, sliding rod.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application.

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

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

As shown in FIGS. 1-6 , according to some embodiments of the present application, a fixture for hoisting a steel beam includes: a beam 100 and a hook base 200 arranged on the top of the beam 100 ; the center of the bottom of the beam 100 is provided There is a balance block 110, a clamping mechanism 300 is symmetrically arranged at both ends of the bottom of the beam 100, a stabilization 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 a connection to the beam The two connecting arms 310 at the bottom of the connecting arm 310, the supporting frame 320 disposed at the bottom of the connecting arm 310, and the slider 330 disposed on the supporting frame 320 and extending downward along the supporting frame 320, the two ends of the connecting arms 310 are respectively connected to the beam The hinge seat 340 at the bottom of the 100 and the top of the slider 330, the center of the support frame 320 is provided with a slideway 321 along its length direction, the two sides of the support frame 320 in the length direction are provided with limit slots 322, and the inner side of the support frame 320 is provided with a support plate 323, a plurality of connecting rods 324 are connected between the support plates 323, sliding plates 350 are arranged on both sides of the slider 330, the sliding plates 350 are inserted into the limiting grooves 322, and a U-shaped clamp 360 is symmetrically arranged at the bottom of the slider 330, and the two A clamping space is formed between the U-shaped clamps 360 , and the bottom of the U-shaped clamps 360 is provided with a pulley 370 .

It should be noted here that the number of the connecting arms 310 is four, the top ends of the two connecting arms 310 on the same side are hinged to the bottom of the beam 100, and the number of U-shaped clamps 360 is four, all of which are connected to the Corresponding to the lower end of the connecting arm 310 , the bottom side of the U-shaped clamp 360 is inclined, so that the U-shaped clamp 360 can slide along the top of the I-shaped steel beam.

According to some embodiments of the present application, the bottoms of the two support frames 320 are provided with optical size measurement sensors, and the optical size measurement sensors are used. An electronically controlled telescopic rod 380 is disposed therebetween, and the electronically controlled telescopic action of the electronically controlled telescopic rod 380 is responsive to the difference between the signals of the two optical dimension measuring sensors and the difference between the two pressure sensors.

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

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 disposed 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 100 , the bottom of the telescopic rod 520 is connected to the support frame 320 .

As shown in FIGS. 1 and 4 , according to some embodiments of the present application, the stabilization mechanism 400 includes a support plate 410 disposed between the support frames 320 , a pressure plate 420 disposed at the bottom of the support plate 410 , and a length of the support plate 410 . The first L-shaped plate 430 at both ends of the direction, the second L-shaped plate 440 disposed at the lower end of the beam 100, the first piston cylinder 450 disposed between the lateral portions of the first L-shaped plate 430 and the second L-shaped plate 440, To the second piston cylinder 460 passing through the support plate 410, and the connecting pipe 470 connected between the first piston cylinder 450 and the second piston cylinder 460, the transverse direction of the first L-shaped plate 430 and the second L-shaped plate 440 The upper and lower parts are spaced apart to form an extrusion cavity. The first piston cylinder 450 is connected to the upper and lower ends of the extrusion cavity. The connecting pipe 470 is provided with a fixing sleeve 480. The fixing sleeve 480 extends upward and is connected to the balance block 110. The second piston cylinder 460 The bottom 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.

It should be noted here that the support plate 410 is provided with a plurality of through holes, and the plurality of through holes are arranged opposite to the second piston cylinder 460 , and the second piston cylinder 460 is fixedly connected to the pressing plate 420 through the through holes.

According to some embodiments of the present application, the slideway 321 is provided with a support spring 390 , 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 .

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

It should be noted here that two limit plates extend outward from both sides of the beam 100 in the length direction, and the sleeve 521 passes through the limit plates in the vertical direction.

According to some embodiments of the present application, the hook base 200 is disposed at the center of the top of the beam 100 , the two sides of the hook base 200 are evenly spaced with a plurality of reinforcing blocks 120 , and the two sides of the top of the hook base 200 are symmetrically arranged with two 210 rings.

According to some embodiments of the present application, a method for using a steel beam hoisting fixture, the specific steps are as follows:

A. When using this device, connect the lifting ring 210 on the hook base 200 through the hoist, drive the device as a whole to the top of the I-shaped steel beam, and contact the steel beam, and then use the hoist to lower the device as a whole;

B. After the pulley 370 at the bottom of the U-shaped clamp 360 contacts the I-shaped steel beam, the four connecting arms 310 are driven to rotate by the gravity of the beam 100, so that the corresponding two connecting arms 310 drive the two sliding blocks 330 and the sliding blocks 350 , so that the two sliders 330 drive the two U-shaped clamps 360 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 on the front and rear sides of the I-shaped steel beam, and are supported by the four support springs 390 and the sliding 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 beam 100 to move upward, and the beam 100 pulls the four connecting arms 310, so that the corresponding two U-shaped clamps 360 are hoisted. When the I-shaped steel beam is lifted, the angle between the connecting arms 310 becomes smaller, so that the corresponding two sliding 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, and the clamps 360 clamp the I-shaped steel beam. During the holding process, the difference between the widths of the two ends of the I-shaped steel beam obtained from the signals of the two optical size measurement sensors is controlled to increase the angle between the two connecting arms 310 at the wider end, and the angle between the two connecting arms 310 at the wider end is controlled The angle between the two connecting arms 310 becomes smaller until the digital difference displayed by the two pressure sensors is zero, then disconnect the electronically controlled telescopic drive power of all the connecting arms 310;

D. During the upward movement of the beam 100, the beam 100 drives the two second L-shaped plates 440 and the two first piston cylinders 450 to move upward, because the support frame 320 remains stationary during the rotation of the connecting arm 310, The first push plate connected on the support plate 410 is brought into contact with the first piston cylinder 450 and the first piston cylinder 450 is squeezed. The two piston cylinders 460 are pressurized and extended, so that the four second piston cylinders 460 drive the pressing plate 420 to move downward and are in close contact with the I-shaped steel beam, thereby further limiting the position of the I-shaped steel beam.

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

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made. These improvements and replacements It should also be regarded as the protection scope of the present invention.

Claims (8)

1. A fixture for hoisting a steel beam comprises: the lifting hook comprises a cross beam (100) and a hook base (200) arranged at the top of the cross beam (100); the device is characterized in that a balance block (110) is arranged at the center of the bottom of the cross beam (100), clamping mechanisms (300) are symmetrically arranged at two ends of the bottom of the cross beam (100), a stabilizing mechanism (400) is arranged between the clamping mechanisms (300), and a positioning mechanism (500) is arranged at the upper end of each clamping mechanism (300); press from both sides and get mechanism (300) including connecting in two linking arm (310) of crossbeam (100) bottom, set up in support frame (320) of linking arm (310) bottom to and set up on support frame (320), along slider (330) of support frame (320) downwardly extending, the both ends of linking arm (310) are connected respectively in articulated seat (340) at crossbeam (100) bottom and slider (330) top, the center of support frame (320) is provided with slide (321) along its length direction, and the both sides of support frame (320) length direction are provided with spacing groove (322), and the inboard of support frame (320) is provided with extension board (323), be connected with a plurality of connecting rods (324) between extension board (323), the both sides of slider (330) are provided with slide (350), slide (350) insert to spacing groove (322) in, the bottom symmetry of slider (330) is provided with U type anchor clamps (360), forms between two U type anchor clamps (360) to press from both sides and gets the space, the bottom of U type anchor clamps (360) is provided with pulley (370).

2. A clamp for steel beam hoisting according to claim 1, wherein the bottom of each of the two support frames (320) is provided with an optical dimension measuring sensor, the optical dimension measuring sensors are used for providing a pressure sensor on any one of the U-shaped clamps (360) on the same side, an electrically controlled telescopic rod (380) is arranged between the connecting arms (310) on the same side, and the electrically controlled telescopic action of the electrically controlled telescopic rod (380) is responsive to the difference between the signals of the two optical dimension measuring sensors and the difference between the two pressure sensors.

3. A clamp for hoisting a steel beam according to claim 1, wherein the positioning mechanism (500) comprises a reinforcing rod (510) connected to the top of the beam (100) and a telescopic rod (520) arranged at the bottom of the reinforcing rod (510), the reinforcing rod (510) is L-shaped, the telescopic rod (520) penetrates through the beam (100) in the vertical direction, and the bottom of the telescopic rod (520) is connected to the support frame (320).

4. The clamp for steel beam hoisting according to claim 1, wherein the stabilizing mechanism (400) comprises supporting plates (410) arranged between the supporting frames (320), pressing plates (420) arranged at the bottom of the supporting plates (410), first L-shaped plates (430) arranged at both ends of the supporting plates (410) in the length direction, second L-shaped plates (440) arranged at the lower ends of the beams (100), first piston cylinders (450) arranged between the transverse portions of the first L-shaped plates (430) and the second L-shaped plates (440), second piston cylinders (460) vertically penetrating the supporting plates (410), and connecting pipes (470) connected between the first piston cylinders (450) and the second piston cylinders (460), wherein the transverse portions of the first L-shaped plates (430) and the second L-shaped plates (440) are arranged at intervals up and down to form extrusion chambers, the first piston cylinders (450) are connected to both ends of the extrusion chambers of the steel beams, fixing sleeves (480) are arranged on the connecting pipes (470), the balance blocks (110) extend upwards, the bottoms of the second piston cylinders (460) are connected to the pressing plates (420), and are used for pushing the pressing plates (420) to move up and down.

5. A clamp for steel beam hoisting according to claim 1, wherein a support spring (390) is arranged in the slideway (321), one end of the support spring (390) is fixedly connected with the inner wall of the slideway (321), and the other end of the support spring (390) is fixedly connected with the sliding block (330).

6. The steel beam hoisting clamp according to claim 1, wherein the telescopic rod (520) comprises a sleeve (521) connected to the reinforcing rod (510) and a sliding rod (522) inserted into the sleeve (521), and the telescopic rod (520) can freely extend and retract to limit the position and the moving direction of the support frame (320).

7. The steel beam hoisting clamp according to claim 1, wherein the hook base (200) is arranged at the center of the top of the cross beam (100), a plurality of reinforcing blocks (120) are uniformly arranged on two sides of the hook base (200) at intervals, and two hanging rings (210) are symmetrically arranged on two sides of the top of the hook base (200).

8. The use method of the steel beam hoisting clamp applied to any one of claims 1 to 7 is characterized by comprising the following specific steps of:

A. when the device is used, a lifting machine is connected with a lifting ring (210) on a lifting hook base (200), the whole device is driven to be above an I-shaped steel beam and is in contact with the steel beam, and then the whole device is lowered down by the lifting machine;

B. after the pulleys (370) at the bottoms of the U-shaped clamps (360) are contacted with the I-shaped steel beam, the four connecting arms (310) are driven to rotate by pressing down through the gravity of the cross beam (100), the two corresponding connecting arms (310) drive the two sliding blocks (330) and the sliding plate (350), the two sliding blocks (330) drive the two U-shaped clamps (360) to be away from each other, at the moment, the pulleys (370) at the bottoms of the U-shaped clamps (360) slide on the top of the I-shaped steel beam, and after the pulleys (370) are separated from the top of the I-shaped steel beam, the four U-shaped clamps (360) move downwards and are positioned at the front side and the rear side of the I-shaped steel beam and are supported by the four supporting springs (390) and the sliding plate (350), so that the four U-shaped clamps (360) clamp the I-shaped steel beam;

C. when an I-shaped steel beam is lifted, a crane pulls a lifting hook base (200), so that the lifting hook base (200) pulls a cross beam (100) to move upwards, the cross beam (100) pulls four connecting arms (310), the I-shaped steel beam is lifted by two corresponding U-shaped clamps (360), the angle between the connecting arms (310) is reduced, two corresponding sliding plates (350) are tightened, the two U-shaped clamps (360) are close to each other, the I-shaped steel beam is clamped by the U-shaped clamps (360), the angle between the two connecting arms (310) at one end with a wider width is controlled to be increased according to the difference value of the widths of the two ends of the I-shaped steel beam obtained by two optical dimension measurement sensor signals in the clamping process, the angle between the two connecting arms (310) at one end with the narrower width is controlled to be reduced, and the electric control telescopic driving power supplies of all the connecting arms (310) are disconnected until the digital difference value displayed by the two pressure sensors is zero;

D. when the beam (100) moves upwards, the beam (100) drives the two second L-shaped plates (440) and the two first piston cylinders (450) to move upwards, the support frame (320) is kept still in the rotating process of the connecting arm (310), so that the first push plates connected to the support plate (410) are in contact with the first piston cylinders (450) and extrude the first piston cylinders (450), gas in the first piston cylinders (450) enters the second piston cylinders (460) through the connecting pipes (470) after being compressed, the second piston cylinders (460) extend after being pressurized, and the four second piston cylinders (460) drive the pressure plates (420) to move downwards and tightly contact with the I-shaped steel beams to further limit the I-shaped steel beams.

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