CN114182964B

CN114182964B - Pipe truss hoisting and positioning construction method

Info

Publication number: CN114182964B
Application number: CN202111512542.3A
Authority: CN
Inventors: 丁习斌; 何政; 刘洋; 龚仲毅; 杨波; 靳壮壮; 何俭华; 罗成; 苏博; 方丽滨
Original assignee: China Railway No 5 Engineering Group Co Ltd; Construction Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
Current assignee: China Railway No 5 Engineering Group Co Ltd; Construction Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2023-05-30
Anticipated expiration: 2041-12-08
Also published as: CN114182964A

Abstract

The invention discloses a pipe truss hoisting and positioning construction method, which comprises the following steps: step 1, installing a steel column; step 2, hoisting a main truss on the steel column, wherein the section of the main truss is wide at the upper part and narrow at the lower part; step 3, conveying by using a crane to enable the secondary truss to slowly move downwards in a mode of being perpendicular to the main trusses at two sides; step 4, when the secondary truss approaches the main truss, clamping the secondary truss from the lower part through a hoisting positioning device, rotating the secondary truss by a preset angle, and enabling the secondary truss to continuously move downwards slowly through the cooperation of the crane and the hoisting positioning device; and 5, when the secondary truss moves downwards to a preset position, the hoisting positioning device rotates by a preset angle to enable the secondary truss to return to the position of the main truss vertical to the two sides, and finally, two ends of the secondary truss are welded on the main truss. The invention improves the existing construction flow of the secondary truss, improves the hoisting efficiency of the secondary truss and reduces the labor cost.

Description

Pipe truss hoisting and positioning construction method

Technical Field

The invention relates to a pipe truss hoisting and positioning construction method, and belongs to the technical field of pipe truss installation.

Background

In the prior art, a large number of pipe truss steel structures are used in large buildings, especially in the top floors of large buildings. The steel column is required to be installed firstly when the top layer pipe truss steel structure is constructed, then the main truss is hoisted and fixed on the steel column, and finally the secondary truss is fixed. At present, two main fixing modes for the secondary truss are available: one is from bottom to top hoisting. For the triangular secondary truss, the secondary truss is lifted to be an inverted triangle, so that the upper part is short and the lower part is slightly long during lifting; the installed main truss is also in an inverted triangle shape, so that the lifting difficulty from top to bottom is high, and the construction efficiency is low due to the limited construction site. The other is hoisting from top to bottom, when the secondary truss approaches to the appointed position, the secondary truss is pulled to the appointed position by a manual zipper and then welded, and the mode has the problems of low construction precision, time and labor waste, high risk and the like.

Disclosure of Invention

The invention aims to solve the technical problems that: the pipe truss hoisting and positioning construction method can realize quick and accurate installation of the secondary truss, and effectively solves the problems of low construction precision, high labor intensity and low working efficiency of the existing secondary truss hoisting.

The technical scheme of the invention is as follows: a pipe truss hoisting and positioning construction method comprises the following steps:

step 1, installing a steel column;

step 2, hoisting a main truss on the steel column, wherein the section of the main truss is wide at the upper part and narrow at the lower part;

step 3, conveying by using a crane to enable the secondary truss to slowly move downwards in a mode of being perpendicular to the main trusses at two sides;

step 4, when the secondary truss approaches the main truss, clamping the secondary truss from the lower part through a hoisting positioning device, rotating the secondary truss by a preset angle, and enabling the secondary truss to continuously move downwards slowly through the cooperation of the crane and the hoisting positioning device;

and 5, when the secondary truss moves downwards to a preset position, the hoisting positioning device rotates by a preset angle to enable the secondary truss to return to the position of the main truss vertical to the two sides, and finally, two ends of the secondary truss are welded on the main truss.

In one example, the end faces of the secondary trusses match the side shape of the primary truss.

In one example, the hoisting and positioning device includes:

a base;

the first driving mechanism is arranged on the base;

the rotating platen can be rotatably arranged on the base, and the first driving mechanism can drive the rotating platen to rotate;

the lifting mechanism is arranged on the rotating bedplate;

the supporting bedplate is arranged on the lifting mechanism and can move up and down along with the lifting mechanism;

the second driving mechanism is arranged on the supporting platen;

the clamping assembly is arranged on the supporting platen and comprises two mechanical claws which are arranged oppositely, and the second driving mechanism can drive the two mechanical claws to move between loosening and clamping.

In one example, the hoisting and positioning device further includes:

the buckle plate is hinged to the side face of the base;

the fixed rod pieces are pre-buried on the ground between the main trusses at the two sides, and the pinch plates can be fixed on the fixed rod pieces through fasteners.

In one example, the hoisting and positioning device further includes:

the third driving mechanism is arranged in the base;

the travelling wheel is connected with the third driving mechanism;

the third driving mechanism can drive the travelling wheels to move between being contracted in the base and extending out of the bottom surface of the base.

In one example, the clamping assembly further comprises:

the clamping support is arranged on the supporting platen;

the rotating main shaft is rotatably arranged on the clamping support;

the driving gear is provided with a connecting end and a gear end, the connecting end is connected with the mechanical claws, the gear ends of the two opposite mechanical claws are meshed, and the driving gear is fixed on the rotating main shaft;

the second driving mechanism can drive the rotation main shaft to rotate, so that the mechanical claw is driven to act.

In one example, the rotating spindle is spaced apart by two pairs of the grippers.

In one example, the lifting mechanism is an electrohydraulically driven scissor lift platform.

The beneficial effects of the invention are as follows: the invention improves the existing construction flow of the secondary truss, improves the hoisting efficiency of the secondary truss and reduces the labor cost. Compared with the prior art, the invention has the following advantages: 1. a plurality of secondary trusses can be welded outside the construction site, so that the efficiency is high; the hoisting process has high mechanization degree, high efficiency and low risk. 2. The secondary truss is mainly positioned and fixed by the crane and the lifting position-adjusting device, the precision is higher, and the construction quality is high.

Drawings

FIG. 1 is a schematic view of a pipe truss hoist;

FIG. 2 is a front view of the lifting and positioning device;

FIG. 3 is a perspective view of the lifting and positioning device at a view angle;

fig. 4 is a schematic perspective view of the hoisting and positioning apparatus at another view angle;

FIG. 5 is a schematic view of a third drive mechanism and road wheels;

FIG. 6 is a schematic view of a clamping assembly;

FIG. 7 is a schematic view of a gripper and a drive gear;

FIG. 8 is a schematic view of a buckle and a stationary bar;

reference numerals illustrate:

1, a steel column;

2, a main truss;

3 truss times;

4, hoisting the positioning device;

41 base, 42 first driving mechanism, 43 rotating platen, 44 lifting mechanism, 45 supporting platen, 46 second driving mechanism, 47 clamping assembly, 48 buckle, 49 third driving mechanism, 410 travelling wheel;

471 mechanical claws, 472 clamping support, 473 rotating main shaft, 474 driving gear;

and 5, fixing the rod piece.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 8, the method for lifting and positioning a pipe truss according to the present embodiment includes the following steps:

step 1, installing a steel column 1;

the steel columns 1 of the pipe truss are installed on site first, and generally, the steel columns 1 are arranged in a plurality of rows at intervals. The steel columns 1 are mainly used for supporting a main truss 2 and a secondary truss 3 of the installation pipe truss.

Step 2, hoisting a main truss 2 on the steel column 1, wherein the section of the main truss 2 is wider at the upper part and narrower at the lower part;

after the steel column 1 is installed, a jig frame is erected on the ground on site to weld out a main truss 2, then single truss hoisting or sectional hoisting is carried out to position, and then the main truss 2 is welded on the steel column 1. In this embodiment, the cross section of the main truss 2 is wider at the top and narrower at the bottom, so that the upper distance between two adjacent rows of main trusses 2 is smaller than the lower distance after the main trusses 2 are welded on the steel columns 1.

Step 3, conveying by using a crane so that the secondary truss 3 slowly moves downwards in a mode of being perpendicular to the main trusses 2 on two sides;

and a jig frame is arranged outside the field to weld a secondary truss 3, and the secondary truss 3 is used for being connected between the two main trusses 2. The two end surfaces of the secondary truss 3 are matched with the side surfaces of the main truss 2 to be connected. The secondary truss 3 is hoisted and transported by a crane, and the secondary truss 3 is hoisted from top to bottom in a manner of being perpendicular to the main trusses 2 on two sides. In the embodiment, the secondary truss 3 is hoisted into an inverted triangle, and the lifting point can find out the position of the center of gravity of the space through the earlier-stage secondary truss 3BIM model, so that the position of the lifting point and the position of the bottom clamping point are selected, and the hoisting stability is ensured.

Step 4, when the secondary truss 3 approaches the main truss 2, clamping the secondary truss 3 from below through the hoisting position-adjusting device 4 and rotating the secondary truss 3 by a preset angle, and then enabling the secondary truss 3 to continuously move downwards slowly through the cooperation of the crane and the hoisting position-adjusting device 4;

when the bottom of the secondary truss 3 moves down to a certain distance from the upper part of the main truss 2, for example, 10cm, the crane controls the secondary truss 3 to temporarily move down, then the horizontal position of the secondary truss 3 is adjusted by the hoisting positioning device 4 fixed below the secondary truss 3, specifically, the secondary truss 3 is clamped from below by the hoisting positioning device 4, and rotated by a predetermined angle, for example, 30 degrees, 60 degrees and the like, so that two ends of the secondary truss 3 have a gap with the adjacent main truss 2, then the crane is controlled to continuously move down the secondary truss 3, and the hoisting positioning device 4 keeps clamping the secondary truss 3 in the downward movement process of the secondary truss 3, and simultaneously the hoisting positioning device 4 also slowly moves down synchronously.

And 5, when the secondary truss 3 moves downwards to a preset position, the hoisting and positioning device 4 rotates by a preset angle to enable the secondary truss 3 to return to the position vertical to the main trusses 2 on the two sides, and finally, the two ends of the secondary truss 3 are welded on the main trusses 2.

When the secondary truss 3 moves down to the designated installation position, the crane controls the secondary truss 3 to stop moving down, the hoisting and positioning device 4 also synchronously stops moving down, and then the hoisting and positioning device 4 rotates by a predetermined angle, such as 30 ° and 60 ° as described above, so that the secondary truss 3 returns to the position perpendicular to the main trusses 2 on both sides and almost contacts with the side surfaces of the main trusses 2 on both sides, and finally both ends of the secondary truss 3 are welded on the side surfaces of the main trusses 2. In this embodiment, when the secondary truss 3 is lifted and moved down, the auxiliary judgment of the laser plumb aligner can be performed, the laser lamp turned on by the plumb aligner is turned on the designated position, and when the secondary truss 3 is lifted and moved down to the point, the error is within the allowable range.

The lifting and positioning device 4 comprises a base 41, a first driving mechanism 42, a rotating bedplate 43, a lifting mechanism 44, a supporting bedplate 45, a second driving mechanism 46 and a clamping assembly 47. The base 41 mainly plays a supporting role for supporting and mounting the components such as the first driving mechanism 42, the rotating platen 43, the lifting mechanism 44, the supporting platen 45, the second driving mechanism 46, the clamping assembly 47, and the like. The first driving mechanism 42 is mounted on the base 41 for providing rotational power. In this embodiment, the first driving mechanism 42 may be a driving motor. The rotating platen 43 is rotatably mounted on the base 41, and the first driving mechanism 42 can drive rotation of the rotating platen 43. The elevating mechanism 44 is mounted on the rotating platen 43 and mainly serves to elevate the supporting platen 45, the second driving mechanism 46 and the clamping assembly 47. The support platen 45 is mounted on the elevating mechanism 44. A second drive mechanism 46 is mounted on the support platen 45 for providing clamping power. The clamping assembly 47 is mounted on the support platen 45 and includes two oppositely disposed grippers 471, and the second drive mechanism 46 is operable to drive the two grippers 471 between the release and clamping.

Further, the lifting positioning device 4 further includes a buckle 48, the buckle 48 is hinged to a side surface of the base 41, a fixing rod 5 is pre-buried on the ground between the main trusses 2 at two sides, and the buckle 48 can be fixed on the fixing rod 5 through a fastener. In this embodiment, 4 pinch plates 48 are hinged on four surfaces of the base 41 respectively, strip-shaped openings are formed in the pinch plates 48, a plurality of U-shaped bolts are embedded in the ground correspondingly to serve as fixing rods 5, when the hoisting positioning device 4 needs to be fixed, the pinch plates 48 can be rotated to a horizontal position, the U-shaped bolts are inserted into the strip-shaped openings, and finally the fixing is performed through gaskets and nuts. Through the fixation of the pinch plate 48 and the fixed rod piece 5, the horizontal fixation of the hoisting and positioning device 4 can be realized, and further the torque required by the hoisting and positioning device 4 when the secondary truss 3 is rotated is ensured.

Further, the lifting and positioning device 4 further includes a third driving mechanism 49 and a travelling wheel 410, wherein the third driving mechanism 49 is installed in the base 41, the travelling wheel 410 is connected with the third driving mechanism 49, and the third driving mechanism 49 can drive the travelling wheel 410 to move between being retracted in the base 41 and extending out of the bottom surface of the base 41. In this embodiment, the third driving mechanism 49 may be hydraulic cylinders, four holes are formed in the bottom surface of the base 41, the 4 hydraulic cylinders are respectively installed in the four holes, and the travelling wheel 410 is installed at the free end of the telescopic rod of the hydraulic cylinder. When the lifting and positioning device 4 needs to be moved, the travelling wheel 410 can extend out of the bottom surface of the base 41 through the extension of the telescopic rod of the hydraulic cylinder, so that the movement is convenient. When the base 41 needs to be fixed, the travelling wheel 410 can be contracted in the base 41 by contracting the telescopic rod of the hydraulic oil cylinder, so that the device is convenient to fix. In this embodiment, a rubber pad is disposed on the bottom surface of the base 41, and when the travelling wheel 410 is retracted in the base 41, the rubber pad is in direct contact with the ground, so that the base 41 can be protected to a certain extent, and meanwhile, the friction between the base 41 and the ground can be increased, so that the torque required by the hoisting positioning device 4 when the secondary truss 3 is rotated is further ensured.

Further, the clamping assembly 47 further includes a clamping support 472, a rotating main shaft 473 and a driving gear 474, the clamping support 472 being mounted on the support platen 45, the rotating main shaft 473 being rotatably mounted on the clamping support 472, the driving gear 474 having a connecting end and a gear end, the connecting end being connected to the gripper 471, the gear ends of the two opposing grippers 471 being meshed, and the driving gear 474 being fixed to the rotating main shaft 473. In this embodiment, two rotating spindles 473 are rotatably mounted on the clamping support 472, and the gears of two opposite grippers 471 are respectively fixed on the two rotating spindles 473, so that the second driving mechanism 46 can drive one of the rotating spindles 473 to rotate, thereby driving the grippers 471 to act. When the second driving mechanism 46 drives one of the rotating main shafts 473 to rotate, the rotating main shaft 473 drives the two gears thereon to rotate relatively, so that the two grippers 471 move between the open and the closed positions, thereby realizing the loosening and clamping fixation of the secondary truss 3. In this embodiment, the second driving mechanism 46 may be a stepping motor.

Further, two pairs of grippers 471 are spaced apart from the rotary main shaft 473. During hoisting, the two pairs of mechanical claws 471 can relatively ensure relatively stable clamping and rotation.

Further, the lifting mechanism 44 is an electrohydraulically driven scissor lift platform, through which a rapid lifting function can be achieved.

In the construction process of the lifting positioning device 4, firstly, the device is moved to the ground below the lifting welding point, then the travelling wheel 410 is driven by the third driving mechanism 49 to retract in the base 41, the rubber pad on the bottom surface of the base 41 is in direct contact with the ground, then the pinch plate 48 is rotated to a horizontal plane, and the pinch plate is fixed with the U-shaped bolt pre-buried on the ground through the gasket and the nut, so that the device can meet the torque required by rotating the secondary truss 3. Then the electrohydraulic driven scissor type lifting platform is controlled to ascend, so that the supporting bedplate 45 and the clamping assembly 47 move upwards, when the secondary truss 3 is lifted from top to bottom to be close to the main truss 2, the electrohydraulic driven scissor type lifting platform is controlled to ascend, the secondary truss 3 is clamped by the two mechanical claws 471, the mechanical claws 471 are driven to rotate by a certain angle by the first driving mechanism 42, and the secondary truss 3 is continuously and slowly moved downwards by the cooperation of the crane and the electrohydraulic driven scissor type lifting platform; when the secondary truss 3 moves down to a predetermined position, the first driving mechanism 42 drives the mechanical claw 471 to rotate by a predetermined angle so that the secondary truss 3 returns to a position perpendicular to the main trusses 2 on both sides, and finally the two ends of the secondary truss 3 are welded on the main trusses 2. After the completion, the mechanical claw 471 is released, the device is moved to the next hoisting welding point, and the operation is repeated.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The pipe truss hoisting and positioning construction method is characterized by comprising the following steps of:

step 1, installing a steel column (1);

step 2, hoisting a main truss (2) on the steel column (1), wherein the cross section of the main truss (2) is wide at the upper part and narrow at the lower part;

step 3, conveying by using a crane to enable the secondary truss (3) to slowly move downwards in a mode of being perpendicular to the main trusses (2) on two sides, wherein the end faces of the secondary truss (3) are matched with the side faces of the main trusses (2);

step 4, when the secondary truss (3) is close to the main truss (2), clamping the secondary truss (3) from the lower part through the hoisting positioning device (4) and rotating the secondary truss by a preset angle, and then enabling the secondary truss (3) to continuously move downwards slowly through the cooperation of the crane and the hoisting positioning device (4);

step 5, when the secondary truss (3) moves downwards to a preset position, the hoisting positioning device (4) rotates by a preset angle to enable the secondary truss (3) to return to the position perpendicular to the main trusses (2) on the two sides, and finally, two ends of the secondary truss (3) are welded on the main trusses (2);

the hoisting and positioning device (4) comprises:

a base (41);

a first driving mechanism (42) provided on the base (41);

a rotating platen (43) rotatably provided on the base (41), the first driving mechanism (42) being capable of driving the rotating platen (43) to rotate;

a lifting mechanism (44) provided on the rotating platen (43);

a support platen (45) provided on the lifting mechanism (44) and movable up and down along with the lifting mechanism (44);

a second driving mechanism (46) provided on the support platen (45);

the clamping assembly (47) is arranged on the supporting platen (45) and comprises two mechanical claws (471) which are arranged oppositely, and the second driving mechanism (46) can drive the two mechanical claws (471) to move between loosening and clamping;

a buckle plate (48) hinged to the side surface of the base (41);

the fixed rod pieces (5) are pre-buried on the ground between the main trusses (2) on the two sides, and the pinch plates (48) can be fixed on the fixed rod pieces (5) through fasteners.

2. The pipe truss hoisting positioning construction method according to claim 1, wherein the hoisting positioning device (4) further comprises:

a third driving mechanism (49) provided in the base (41);

a travelling wheel (410) connected to the third drive mechanism (49);

the third driving mechanism (49) can drive the travelling wheel (410) to move between being contracted in the base (41) and extending out of the bottom surface of the base (41).

3. The pipe truss hoisting positioning construction method according to claim 1, wherein the clamping assembly (47) further comprises:

a clamping support (472) provided on the support platen (45);

a rotating main shaft (473) rotatably provided on the clamp holder (472);

a drive gear (474) having a connection end and a gear end, said connection end being connected to a gripper (471), the gear ends of two opposing grippers (471) being meshed, and said drive gear (474) being fixed to said rotating spindle (473);

wherein, the second driving mechanism (46) can drive the rotation of the rotating main shaft (473) so as to drive the mechanical claw (471) to act.

4. A pipe truss hoisting and positioning construction method according to claim 3, characterized in that two pairs of mechanical claws (471) are spaced on the rotating main shaft (473).

5. The pipe truss hoisting and positioning construction method according to claim 1, wherein the lifting mechanism (44) is an electrohydraulically driven scissor lift platform.