Balance beam for pipe segment hoisting and hoisting method thereof

Abstract

The present invention relates to the field of shield segment hoisting, and more specifically, to a balance beam for segment hoisting and a hoisting method thereof. The balance beam for segment hoisting includes a crossbeam, a hoisting fixture, two hangers, and two height adjustment mechanisms. The two hangers are fixedly mounted at both ends of the crossbeam, and the hoisting fixture can be raised and lowered in the middle of the crossbeam. Each height adjustment mechanism includes a sprocket, a brake, a fixed pulley, and a first steel cable, a chain, and a second steel cable connected in sequence. The brake is used to limit or release the rotation of the sprocket. The two fixed pulleys are mounted on the crossbeam. Each sling assembly passes through the bottom of a sprocket and the top of a fixed pulley in sequence and is connected to the hanger, and the chain is engaged with the sprocket. In an embodiment of the present invention, the hoisting fixture is raised and lowered by the lifting and lowering of the hook of the segment crane and the deadweight of the crossbeam, the hoisting fixture, and the segment, thereby changing the height of the hanger online without the need for an additional power source. Furthermore, the balance beam has a low headroom and the structural strength of the balance beam remains unchanged.

Description

Technical Field

[0001] The invention relates to the field of shield segment hoisting, and in particular to a balance beam for segment hoisting.

[0002] The invention also relates to a method for hoisting a balance beam for hoisting a pipe segment. Background Art

[0003] At present, in subway shield tunnels, due to different strata, tunnel diameters and other conditions, the specifications of the segments used are also different. In order to improve the applicability of the equipment, the performance of the shield's supporting system must be compatible with 6m-6.6m to meet the construction of segments with different diameters. However, when the shield that meets 6m segments is applied to 6.6m segments, the height difference between the segment crane and the segment car will increase accordingly, resulting in the segment crane being unable to reach the segment lifting hole when lifting the lowest layer of segments on the segment car.

[0004] To solve this problem, the balance beam disclosed in the prior art (such as announcement number CN205370602U) adopts a modular design. When workers apply the shield to larger segments, they can adaptively adjust the shape of the balance beam and lower the height of its lifting bolts 25.

[0005] However, this design significantly increases the height of the balance beam itself, affecting its application in the existing double-bent-beam shield segment lifting system (Optimization Design of Shield Segment Lifting System·Wang Dajiang). At the same time, the increased bending amplitude of the balance beam will also reduce its structural strength. To compensate for the loss in structural strength of the balance beam, the designers have to increase the weight of the balance beam, further increasing the power consumption of the segment crane. Summary of the Invention

[0006] The purpose of the present invention is to provide a balance beam for lifting pipe segments, which aims to adjust the height of the balance beam hoist online without increasing the clearance of the balance beam itself as much as possible, without reducing the structural strength of the balance beam, and without adding additional power sources.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] 7. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 1, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod. said linking rod is pivotally connected to said linking rod. said linking rod is pivotally connected to said linking rod.

[0009] Furthermore, the crossbeam includes two parallel and symmetrically arranged first channel steels, and a number of steel plates vertically connecting the two first channel steels, the steel plates are provided with holes for the sling assembly to pass through, the hanger includes a first bearing seat welded at both ends of the two first channel steels, the sprocket is connected to the first bearing seat through a rotating shaft, the brake is fixedly mounted on one side of the hanger, and the brake is transmission connected to the rotating shaft.

[0010] Furthermore, the hanger is tilted upward so that the axis of the sprocket is higher than the center of gravity of the balance beam for lifting the pipe segment in the direction of gravity.

[0011] Furthermore, two guide columns are provided on both sides of the sling, and the guide columns are welded to the crossbeam. The guide columns include a vertically arranged second channel steel and a slide rail fixedly connected to the second channel steel. Sliders slidably connected to the slide rail are provided on both sides of the sling.

[0012] Furthermore, the net distance between the two guide posts is greater than the maximum lateral swing amplitude of the sling within the working range.

[0013] Furthermore, a second bearing seat is installed on the top end of the guide column, and the fixed pulley is connected to the second bearing seat via a rotating shaft.

[0014] Furthermore, the sling includes a third bearing seat, a first connecting shaft, a second connecting shaft, a bolt seat and a lifting bolt. The third bearing seat and the slider are an integral part. The first connecting shaft is vertically arranged and rotatably connected to the third bearing seat. The second connecting shaft is horizontally arranged and rotatably connected to the first connecting shaft. The bolt seat is fixedly connected to the second connecting shaft. The lifting bolt is vertically arranged and can be disassembled and rotatably connected to the bolt seat.

[0015] Furthermore, the bolt seat includes a tube body with an opening on one side, the tube body is fixedly connected to the second connecting shaft, and the opening direction of the tube body is perpendicular to the axis of the second connecting shaft.

[0016] Furthermore, a supporting plate with a stepped hole is provided at the bottom of the tube body, the stepped hole is coaxial with the tube body, the step of the stepped hole is clearance-matched with the head of the hanging bolt, the hole of the stepped hole is clearance-matched with the rod of the hanging bolt, one side of the stepped hole is open, and the opening direction of the stepped hole is parallel to the opening direction of the tube body.

[0017] A method for lifting a balancing beam for lifting a pipe segment, the method using the balancing beam for lifting a pipe segment, the method comprising the following steps: a step in which the balancing beam for lifting a pipe segment is changed to a first working condition, the sling is not connected to a pipe segment, the weight of the sling is less than the weight of the beam, after the brake releases the sprocket, the sprocket rotates, so that the length of the sling assembly on both sides of the sprocket changes, thereby causing the beam to descend and the sling to ascend, after the sling ascends to a maximum height, the brake restricts the sprocket again; a step in which the balancing beam for lifting a pipe segment is changed to a second working condition, the sling is connected to a pipe segment, the total weight of the sling and the pipe segment is greater than the weight of the beam, after the brake releases the sprocket, the sprocket rotates, so that the length of the sling assembly on both sides of the sprocket The length of the sling assembly changes, causing the sling and the segment to descend, while the crossbeam rises. After the sling descends to the minimum height, the brake again restricts the sprocket, and then separates the sling and the segment; the segment lifting balance beam changes to the third working condition, the sling is connected to the segment, and after the segment rotates 90 degrees, the segment crane lowers the segment to a temporary platform so that the segment is supported. The weight of the sling is less than the weight of the crossbeam. After the brake releases the sprocket, the sprocket rotates, causing the length of the sling assembly on both sides of the sprocket to change, causing the crossbeam to descend and the sling to rise. After the sling rises to the maximum height, the brake again restricts the sprocket, and then the segment crane lifts the segment again.

[0018] Compared with the prior art, this application has the following beneficial effects:

[0019] The embodiment of the present invention realizes the lifting and lowering action of the spreader through the lifting of the hook of the segment crane and the deadweight of the beam, spreader and segment, thereby changing the height of the spreader online without the need for an additional power source, and the clearance of the balance beam is low, and the structural strength of the balance beam remains unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0021] Figure 1 This is a front view of a first working condition of an embodiment of the present invention;

[0022] Figure 2 This is a front view of a second working condition of an embodiment of the present invention;

[0023] Figure 3 A top view of a first working condition of an embodiment of the present invention;

[0024] Figure 4 for Figure 3 Cross-sectional view in the AA direction;

[0025] Figure 5 A three-dimensional diagram of a first working state of an embodiment of the present invention and an enlarged diagram of its local structure;

[0026] Figure 6 is an assembly diagram of an embodiment of the present invention;

[0027] Figure 7 An assembly diagram of a sling according to an embodiment of the present invention;

[0028] The numbers in the figure represent the following:

[0029] 1-crossbeam; 11-first bearing seat; 12-guide column; 13-second bearing seat; 2-sling; 21-third bearing seat; 22-first connecting shaft; 23-second connecting shaft; 24-bolt seat; 241-tube body; 242-support plate; 243-step hole; 25-lifting bolt; 26-handle; 3-hanger; 4-sprocket; 5-brake; 6-fixed pulley; 7-sling assembly; 71-first steel cable; 72-chain; 73-second steel cable. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The present invention provides a balance beam for lifting pipe segments, hereinafter referred to as the balance beam. The advantages are: slightly increasing the clearance of the balance beam itself without changing the straightness and structural strength of the balance beam, and being able to adjust the height of the hanger 2 by the deadweight of the balance beam and the pipe segment without the need for an additional power source.

[0032] refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The two ends of the balance beam are suspended by two pipe segment cranes (not shown in the figure). The balance beam includes: a crossbeam 1, a hanger 2, two hangers 3 and two height adjustment mechanisms. The two hangers 3 are fixedly installed at the two ends of the crossbeam 1, and the hanger 2 can be raised and lowered in the middle of the crossbeam 1. The hanger 2 is used to connect the pipe segments, and the two height adjustment mechanisms are symmetrically arranged on both sides of the hanger 2.

[0033] Each height adjustment mechanism includes a sprocket 4, a brake 5, a fixed pulley 6 and a sling assembly 7, wherein each sling assembly 7 includes a first steel cable 71, a chain 72 and a second steel cable 73 connected in sequence, each hanger 3 is connected to a sprocket 4 and a brake 5 respectively, the sprocket 4 can rotate around a horizontal axis, the brake 5 is used to limit or release the rotation of the sprocket 4, two fixed pulleys 6 are installed on the beam 1 and are symmetrically arranged on both sides of the sling 2, each sling assembly 7 passes around the bottom of a sprocket 4 and the top of a fixed pulley 6 in turn and is connected to one side of the sling 2, and the chain 72 is engaged with the sprocket 4.

[0034] Among them, the first steel cable 71 is used to connect to the hook of the segment crane. The lifting and lowering of the hook of the segment crane and the deadweight of the beam 1, the hanger 2 and the segment are used to realize the lifting and lowering of the hanger 2, thereby changing the height of the hanger 2 online.

[0035] refer to Figure 1 In the first working condition shown, the sling 2 is not connected to the pipe segment. At this time, the weight of the sling 2 is less than the weight of the beam 1. After the brake 5 releases the sprocket 4, the sprocket 4 rotates, causing the length of the sling assembly 7 on both sides of the sprocket 4 to change, thereby causing the beam 1 to descend and the sling 2 to rise. After the sling 2 rises to the maximum height, the brake 5 restricts the sprocket 4 again. At this time, the balance beam is used to lift pipe segments with smaller diameters and higher heights during transportation.

[0036] refer to Figure 2 In the second working condition shown, the spreader 2 is connected to the pipe segment. At this time, the total weight of the spreader 2 and the pipe segment is greater than the weight of the beam 1. After the brake 5 releases the sprocket 4, the sprocket 4 rotates, causing the length of the sling assembly 7 on both sides of the sprocket 4 to change, thereby causing the spreader 2 and the pipe segment to descend, while the beam 1 rises. After the spreader 2 descends to the minimum height, the brake 5 restricts the sprocket 4 again. At this time, the spreader 2 and the pipe segment can be separated, and the balance beam can be used to lift pipe segments with larger diameters and lower heights during transportation.

[0037] In addition, there is a third working condition (not shown in the figure). The sling 2 is connected to the pipe segment, and after the pipe segment is rotated 90 degrees, the pipe segment crane lowers the pipe segment to the temporary platform. At this time, the pipe segment is supported, and the weight of the sling 2 is less than the weight of the beam 1. After the brake 5 releases the sprocket 4, the sprocket 4 rotates, causing the length of the sling assembly 7 on both sides of the sprocket 4 to change, thereby causing the beam 1 to descend and the sling 2 to rise. After the sling 2 rises to the maximum height, the brake 5 restricts the sprocket 4 again, and then the pipe segment crane lifts the pipe segment again. At this time, the total height of the balance beam and the pipe segment is the smallest. At this time, there is no need to separate the sling 2 and the pipe segment. The balance beam can be used in situations where the height of the transportation space is low and the clearance requirements for the balance beam are high, such as in the second half of the stroke of the double-bent beam shield pipe segment lifting system.

[0038] For further reference, Figure 4 、 Figure 5 and Figure 6 .

[0039] The crossbeam 1 includes two parallel and symmetrically arranged first channel steels, and several steel plates vertically connecting the two first channel steels. The steel plates are provided with holes for the sling assembly 7 to pass through. The hanger 3 includes a first bearing seat 11 welded to both ends of the two first channel steels. The sprocket 4 is connected to the first bearing seat 11 through a rotating shaft. The brake 5 is fixedly mounted on one side of the hanger 3, and the brake 5 is transmission-connected to the rotating shaft.

[0040] Preferably, the hanger 3 is tilted upward so that the axis of the sprocket 4 is higher than the center of gravity of the entire balance beam (including the crossbeam 1 and the hanger 2 that does not carry the pipe segment) in the direction of gravity, so as to ensure the stability of the balance beam when it is lifted and avoid overturning.

[0041] Two guide columns 12 are provided on both sides of the sling 2, and the guide columns 12 are welded to the beam 1. The guide columns 12 include a vertically arranged second channel steel and a slide rail fixedly connected to the second channel steel. Sliders slidably connected to the slide rails are provided on both sides of the sling 2. A second bearing seat 13 is installed at the top of the guide column 12, and the fixed pulley 6 is connected to the second bearing seat 13 through a rotating shaft.

[0042] Preferably, the net distance between the two guide posts 12 is greater than the maximum lateral swing amplitude that may be generated by the sling 2 within the normal working range, so as to ensure that the sling 2 can be used normally.

[0043] For further reference, Figure 7 .

[0044] The lifting device 2 includes a third bearing seat 21 , a first connecting shaft 22 , a second connecting shaft 23 , a bolt seat 24 and a lifting bolt 25 .

[0045] The third bearing seat 21 and the slider are an integral part, the first connecting shaft 22 is vertically arranged and rotatably connected to the third bearing seat 21, the second connecting shaft 23 is horizontally arranged and rotatably connected to the first connecting shaft 22, the bolt seat 24 is fixedly connected to the second connecting shaft 23, and the hanging bolt 25 is vertically arranged and detachably and rotatably connected to the bolt seat 24.

[0046] The third bearing seat 21, the first connecting shaft 22, the second connecting shaft 23 and the bolt seat 24 form a universal joint connecting the crossbeam 1 and the lifting bolt 25. This design is used to ensure that the lifting bolt 25 has sufficient degrees of freedom so that the lifting bolt 25 can be flexibly aligned and screwed into the threaded lifting hole on the pipe segment by its own rotation.

[0047] Preferably, a detachable handle 26 is provided on one side of the bolt seat 24. The handle 26 is used for a worker to grasp the bolt seat 24 and rotate it 90 degrees, thereby rotating the direction of the pipe segment.

[0048] Preferably, the bolt seat 24 includes a tube body 241 with an opening on one side. The tube body 241 is fixedly connected to the second connecting shaft 23. The opening direction of the tube body 241 is perpendicular to the axis of the second connecting shaft 23. This design is used to limit the swing angle of the bolt seat 24, so that the swing angle of the bolt seat 24 is limited to 0° ~ + 90°, where 0° refers to the angle of the vertical axis of the bolt seat 24.

[0049] Preferably, a supporting plate 242 with a stepped hole 243 is provided at the bottom of the tube body 241. The stepped hole 243 is coaxial with the tube body 241. The step of the stepped hole 243 is clearance-matched with the head of the hanging bolt 25. The hole of the stepped hole 243 is clearance-matched with the rod of the hanging bolt 25. One side of the stepped hole 243 is open, and the opening direction of the stepped hole 243 is parallel to the opening direction of the tube body 241. This design allows staff to remove or insert the hanging bolt 25 from one side of the tube body 241.

[0050] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the embodiments of the present invention.

Claims

1. A balancing beam for segment hoisting, characterized in that: include: A crossbeam (1), a sling (2), two hangers (3) and two height adjustment mechanisms, wherein the two hangers (3) are fixedly mounted on both ends of the crossbeam (1), the sling (2) is arranged in the middle of the crossbeam (1) in a manner capable of being raised and lowered, the sling (2) is used to connect pipe segments, and the two height adjustment mechanisms are symmetrically arranged on both sides of the sling (2); Wherein, each height adjustment mechanism comprises a sprocket (4), a brake (5), a fixed pulley (6) and a sling assembly (7), wherein each of the sling assemblies (7) comprises a first steel cable (71), a chain (72) and a second steel cable (73) connected in sequence, each of the hangers (3) is respectively connected to a sprocket (4) and a brake (5), the sprocket (4) is capable of rotating around a horizontal axis, the brake (5) is used to limit or release the rotation of the sprocket (4), two fixed pulleys (6) are mounted on the beam (1) and are symmetrically arranged on both sides of the sling (2), each of the sling assemblies (7) is connected to the sling (2) by passing through the bottom of a sprocket (4) and the top of a fixed pulley (6), and the chain (72) is engaged with the sprocket (4); The crossbeam (1) includes two parallel and symmetrically arranged first channel steels, and a plurality of steel plates vertically connecting the two first channel steels, the steel plates are provided with holes for the sling assembly (7) to pass through, the hanger (3) includes a first bearing seat (11) welded to both ends of the two first channel steels, the sprocket (4) is connected to the first bearing seat (11) via a rotating shaft, the brake (5) is fixedly mounted on one side of the hanger (3), and the brake (5) is transmission-connected to the rotating shaft; The hanger (3) is tilted upward so that the axis of the sprocket (4) is higher than the center of gravity of the balance beam for segment hoisting in the direction of gravity; The sling (2) includes a third bearing seat (21), a first connecting shaft (22), a second connecting shaft (23), a bolt seat (24) and a hanging bolt (25); the third bearing seat (21) and the slider are an integral part; the first connecting shaft (22) is vertically arranged and rotatably connected to the third bearing seat (21); the second connecting shaft (23) is horizontally arranged and rotatably connected to the first connecting shaft (22); the bolt seat (24) is fixedly connected to the second connecting shaft (23); and the hanging bolt (25) is vertically arranged and detachably and rotatably connected to the bolt seat (24); The bolt seat (24) includes a tube body (241) with an opening on one side, the tube body (241) is fixedly connected to the second connecting shaft (23), and the opening direction of the tube body (241) is perpendicular to the axis of the second connecting shaft (23); the bottom of the tube body (241) is provided with a supporting plate (242) with a step hole (243), the step hole (243) is coaxial with the tube body (241), the step of the step hole (243) is clearance-matched with the head of the hanging bolt (25), the hole of the step hole (243) is clearance-matched with the rod of the hanging bolt (25), one side of the step hole (243) is open, and the opening direction of the step hole (243) is parallel to the opening direction of the tube body (241).

2. The balancing beam for segment hoisting according to claim 1, characterized in that: Two guide columns (12) are provided on both sides of the sling (2), and the guide columns (12) are welded to the crossbeam (1). The guide columns (12) include a second vertically arranged channel steel and a slide rail fixedly connected to the second channel steel. Sliders slidably connected to the slide rails are provided on both sides of the sling (2).

3. The balancing beam for segment hoisting according to claim 2, characterized in that: The net distance between the two guide columns (12) is greater than the maximum lateral swing amplitude generated by the sling (2) within the working range.

4. The balancing beam for segment hoisting according to claim 2, characterized in that: A second bearing seat (13) is installed at the top end of the guide column (12), and the fixed pulley (6) is connected to the second bearing seat (13) via a rotating shaft.

5. A method for hoisting a balance beam for segment hoisting, characterized in that: The hoisting method uses the segment hoisting balance beam according to any one of claims 1 to 4, and the hoisting method comprises the following steps: The step of changing the balance beam for pipe segment hoisting to the first working condition, wherein the sling (2) is not connected to the pipe segment, the weight of the sling (2) is less than the weight of the beam (1), and after the brake (5) releases the sprocket (4), the sprocket (4) rotates, causing the length of the sling assembly (7) on both sides of the sprocket (4) to change, thereby causing the beam (1) to descend and the sling (2) to ascend, and after the sling (2) ascends to the maximum height, the brake (5) restricts the sprocket (4) again; The step of changing the balance beam for pipe segment hoisting to the second working condition, wherein the sling (2) is connected to the pipe segment, and the total weight of the sling (2) and the pipe segment is greater than the weight of the crossbeam (1), and after the brake (5) releases the sprocket (4), the sprocket (4) rotates, causing the length of the sling assembly (7) on both sides of the sprocket (4) to change, thereby causing the sling (2) and the pipe segment to descend, and the crossbeam (1) to ascend, and after the sling (2) descends to the minimum height, the brake (5) restricts the sprocket (4) again, and then separates the sling (2) and the pipe segment; The balancing beam for segment lifting is changed to the third working condition. The sling (2) is connected to the segment, and after the segment rotates 90 degrees, the segment crane lowers the segment to a temporary pedestal so that the segment is supported. The weight of the sling (2) is less than the weight of the beam (1). After the brake (5) releases the sprocket (4), the sprocket (4) rotates, causing the length of the sling assembly (7) on both sides of the sprocket (4) to change, thereby causing the beam (1) to descend and the sling (2) to rise. After the sling (2) rises to the maximum height, the brake (5) limits the sprocket (4) again, and then the segment crane lifts the segment again.

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