CN211419291U

CN211419291U - Box girder lifting appliance

Info

Publication number: CN211419291U
Application number: CN201921849720.XU
Authority: CN
Inventors: 乐锋; 杨柏林; 张晓政; 乐鹿峰; 魏文柱
Original assignee: Third Engineering Co Ltd of China Railway 17th Bureau Group Co Ltd
Current assignee: Third Engineering Co Ltd of China Railway 17th Bureau Group Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-09-04
Anticipated expiration: 2029-10-30

Abstract

The utility model provides a box girder lifting appliance, which comprises a fixing part used for being connected with a sling, a first swinging part positioned below the fixing part, two sliding parts arranged at the left side and the right side of the first swinging part in a sliding way, and second swinging parts respectively arranged at the lower parts of the two sliding parts; a groove is arranged below the fixed part, a protruding part which is positioned in the groove and is rotationally connected with the fixed part is arranged at the middle part of the first swinging part, and the first swinging part can swing up and down around the rotating axis of the protruding part; the second swinging member is used for being connected with the suspension rod, the rotating axis of the second swinging member is parallel to the left-right direction, and the second swinging member can swing around the rotating axis thereof along the front-back direction. The utility model provides a pair of case roof beam hoist is connected with hoist cable and jib respectively through spread groove and mounting hole, and the back and forth swing through the luffing motion of first oscillating piece and second oscillating piece realizes the elimination of internal stress, guarantees construction safety, has prolonged the life of hoist cable and jib.

Description

Box girder lifting appliance

Technical Field

The utility model belongs to the technical field of box girder lifting device, more specifically say, relate to a box girder hoist.

Background

The box girder belongs to one of the middle girders in bridge engineering, the interior of the box girder is hollow, and flanges are arranged on two sides of the upper part of the box girder and are similar to boxes, so that the box girder is named. And reinforced concrete box girders are required to be erected at places such as high-speed railways, passenger dedicated lines and the like.

According to different requirements, the currently common box girders have three types, four hoisting holes are arranged at the tops of the three types, the transverse intervals of the hoisting holes are respectively 3.4 meters, 3.66 meters and 3.8 meters, and the corresponding box girders are respectively small box girders, medium box girders and large box girders. The first step of erecting the box girder is the hoisting construction operation of the box girder, specifically, a constructor moves the box girder through a portal frame or other girder moving machines (collectively referred to as "girder moving machines"), and in the process, a hanger is required to be used for installation between the girder moving machines and the box girder.

Among the prior art, the hoist passes through the hoist cable with moving the roof beam machine and is connected, is connected through the jib between hoist and the case roof beam, through setting up like this, can be very convenient when being connected the hoist with moving roof beam machine or case roof beam, and its firmness has also obtained the assurance. However, in the moving process of the box girder, a great amount of stress is generated inside the hanger, and particularly, if the box girder has a tendency to swing in a front-back direction or in an up-down direction, the stress in the same direction is generated inside the hanger, the stress is concentrated on the hanger, the slings swing in the same direction, and the hanger rod swings, which affects the construction safety on one hand and shortens the service life of the slings and the hanger rod on the other hand.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a case roof beam hoist aims at solving the unable stress relief's of hoist that exists among the prior art problem, realizes stabilizing construction and extension hoist cable life's technological effect.

In order to achieve the above object, the utility model adopts the following technical scheme: provided is a box girder spreader, including:

the fixing piece is used for being connected with the sling, and the bottom surface of the fixing piece is provided with an upward concave groove;

the first swinging piece is positioned below the fixed piece, and a protruding part which is positioned in the groove and is rotationally connected with the fixed piece is arranged in the middle of the first swinging piece; the first swinging member is capable of swinging in the up-down direction about the axis of rotation of the projecting portion;

the two sliding parts are respectively arranged on two sides of the first swinging part in a sliding manner along the left-right direction; and

two second swinging members for connecting with the suspension rod; the two second swinging pieces are respectively rotatably arranged at the lower parts of the two sliding pieces, the rotating axes of the second swinging pieces are parallel to the left-right direction, and the second swinging pieces can swing around the rotating axes thereof along the front-back direction.

As another embodiment of the present application, a fixing shaft is disposed in the groove along a front-rear direction, and a first through hole penetrating along the front-rear direction is disposed on the protruding portion; the fixed shaft penetrates through the first through hole, and the protruding portion swings around the fixed shaft.

As another embodiment of the present application, a first connecting portion is disposed on a bottom surface of the sliding member, a second connecting portion is disposed on the second swinging member, and the first connecting portion is connected to the second connecting portion through a rotating shaft.

As another embodiment of the present application, the first connecting portion includes two sets of bosses disposed at intervals in the left-right direction, and the bosses are provided with insertion grooves with downward openings;

the second connecting part comprises two swinging plates which are arranged at intervals along the left-right direction, the two swinging plates correspond to the bosses one by one, and the swinging plates are inserted into the embedded grooves;

two ends of the rotating shaft respectively penetrate through the two groups of bosses and the two groups of swinging plates.

As another embodiment of the present application, two sides of the first swinging member are respectively provided with a slot, and the sliding member is provided with an insertion block inserted into the slot; the first swinging piece is connected with the sliding piece through a bolt.

As another embodiment of the present application, at least one clip is detachably connected to the insertion block, the clip is located between the sliding member and the first swinging member, and the clip is used for limiting the sliding of the sliding member to the first swinging member.

As another embodiment of this application, the fastener include with the butt plate of inserted block both sides butt, and set up be in connecting plate on the top surface of inserted block, the both sides of connecting plate with the top of butt plate is connected.

As another embodiment of the application, the top surface of the inserting block is provided with a limiting groove, and the bottom surface of the clamping piece is fixedly provided with a limiting rod which is used for being inserted into the limiting groove.

The utility model provides a pair of case roof beam hoist's beneficial effect lies in: in the hoisting construction operation process, the fixed part is connected with a sling on the beam moving machine, the second swinging part is connected with a suspender, and the sliding part is used for adjusting the distance between the second swinging part and the suspender, so that the suspender on the second swinging part can be connected with hoisting holes of box beams, and the aim of connecting the box beams with different specifications is fulfilled; when the box girder generates a tendency of swinging towards the front-back direction or the up-down direction, the stress in the front-back direction generated in the lifting appliance can be eliminated through the front-back swinging of the second swinging piece, and the stress in the up-down direction generated in the lifting appliance can be eliminated through the up-down swinging of the first swinging piece. Compared with the prior art, the utility model provides a pair of case roof beam hoist possesses the ability of eliminating internal stress, can be connected with the case roof beam of different specifications, when guaranteeing construction safety, has prolonged the life of hoist cable and jib.

Drawings

Fig. 1 is a schematic structural diagram of a box girder sling according to the present invention (for easy observation, only one sling 100 is shown);

fig. 2 is one of the explosion diagrams of a box girder sling according to the present invention (for easy observation, the sling 100 is hidden, and the sling 100 is hidden in the following figures, which are not repeated herein);

fig. 3 is a second schematic diagram illustrating an explosion of a box girder spreader according to the present invention;

fig. 4 is one of the schematic exploded views of the sliding member and the second swinging member used in the present invention (the suspension rod 200 is hidden);

FIG. 5 is a schematic structural view of a first oscillating member used in the present invention;

fig. 6 is a cross-sectional view of a fastener employed in the present invention.

In the figure, 1, a fixing piece; 11. connecting grooves; 12. a groove; 121. a fixed shaft; 2. a first swinging member; 21. a first through hole; 22. a slot; 23. a projection; 3. a slider; 31. a boss; 311. a groove is embedded; 32. a rotating shaft; 33. inserting a block; 331. a limiting groove; 4. a second swinging member; 41. mounting holes; 42. a swing plate; 421. a second through hole; 5. a fastener; 51. a butt joint plate; 52. a connecting plate; 53. a limiting rod; 100. a sling; 200. a boom.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 5, a box girder hanger according to the present invention will be described. The box girder lifting appliance comprises a fixing part 1, a first swinging part 2, a sliding part 3 and a second swinging part 4.

Be equipped with the spread groove 11 that is used for being connected with hoist cable 100 on the top surface of mounting 1, spread groove 11 is equipped with the multiunit to evenly arrange along fore-and-aft direction and left and right sides direction, set up like this and can connect many hoist cable 100 simultaneously, with the relation of being connected that improves mounting 1 and move roof beam machine. A groove 12 is arranged below the fixing member 1, and the cross section of the groove 12 is an arc-shaped groove recessed towards the upper part of the fixing member 1.

The first swinging member 2 is rotatably connected with the fixed member 1, specifically, a protruding portion 23 which is located in the groove 12 and rotatably connected with the fixed member 1 is arranged at the middle part of the first swinging member 2, the rotation axis of the protruding portion 23 is parallel to the front-back direction, and the first swinging member 2 can swing up and down around the rotation axis of the protruding portion 23 of the first swinging member 2.

The two sliding members 3 are provided, the two sliding members 3 are respectively located on both sides of the first swinging member 2, and each sliding member 3 is connected with the first swinging member 2 in a sliding manner in the left-right direction.

The second swinging members 4 are provided with two, which are respectively positioned at the lower parts of the two sliding members 3 (the lower part of each sliding member 3 is provided with one second swinging member 4), and the second swinging members 4 are rotatably connected to the sliding members 3, the rotating axis of the second swinging members 4 is parallel to the left-right direction, and the second swinging members 4 can swing around the rotating axis along the front-back direction; each second swinging member 4 is provided with two mounting holes 41 for the suspension rod 200 to pass through in the vertical direction, and after the suspension rod 200 passes through, the bottom end of the suspension rod 200 is connected with the box girder, thereby realizing the purpose of connecting the second swinging member 4 with the box girder.

During installation, constructors need to connect the fixing pieces 1 with the slings 100 on the beam moving machine one by one; after the suspension ropes 100 are connected, the sliding parts 3 are moved along the left and right directions, so that the distance between the second swinging parts 4 is the same as that between the hoisting holes on the box girder; then, the suspender 200 is passed through the mounting hole 41 on the second swinging member 4, and the end of the suspender 200 is connected with the box girder, thereby completing the installation process of the box girder sling (simply referred to as sling). It should be noted that the distance between the second swinging members 4 (also called the distance between the adjusting sliding members 3, or simply called the distance adjustment of the sliding members 3) should be adjusted and locked, and then the box beams should be connected; such a process can ensure that the distance between the hangers 200 is the same as the distance between the hanging holes in the box girder when the hangers 200 are connected to the box girder, and thus, the slider 3 can be prevented from falling off due to the connection between the hangers 200 and the box girder while adjusting the distance between the hangers 200.

When the lifting appliance is used, when the box girder generates a movement trend towards the front-back direction or the up-down direction, the stress in the same direction can be generated in the lifting appliance, and if the stress is along the front-back direction, the second swinging piece 4 can swing correspondingly; if the stress is in the up-down direction, the first swinging member 2 will swing in the front-back direction; the swing process can avoid the influence caused by stress (the influence is the tendency of swinging the sling 100 and the suspender 200), thereby ensuring the construction safety and prolonging the service life of the sling 100 and the suspender 200.

Referring to fig. 1 to 2, as a specific embodiment of the box girder hanger according to the present invention, a fixing shaft 121 is disposed in the groove 12 along the front-back direction, and both ends of the fixing shaft 121 are limited by bolts (the fixing shaft 121 is limited to move along the front-back direction); the protruding part 23 is provided with a first through hole 21 penetrating along the front-back direction; the fixing shaft 121 is disposed through the first through hole 21, and the protrusion 23 swings up and down with the fixing shaft 121 as a shaft; when a vertical stress is generated in the hanger, the first swinging member 2 swings in the vertical direction with the fixed shaft 121 as the axial direction, so as to eliminate the stress and eliminate the influence of the stress.

Referring to fig. 4, as a specific embodiment of the box girder lifting device provided by the present invention, a first connecting portion is disposed on a bottom surface of each sliding member 3, a second connecting portion is disposed on each second swinging member 4, and the first connecting portion and the second connecting portion are connected through a rotating shaft 32.

Specifically, the first connecting portion includes two sets of bosses 31 arranged at intervals in the left-right direction, and the bosses 31 are provided with insertion grooves 311 with downward openings; the second connecting part comprises two swinging plates 42 arranged at intervals along the left-right direction, the two swinging plates 42 correspond to the bosses 31 one by one, and the swinging plates 42 are inserted in the embedded grooves 311; both ends of the rotating shaft 32 are respectively disposed through the two sets of bosses 31 and the two sets of swing plates 42. The swing plate 42 is provided with a second through hole 421 arranged in the left-right direction, and the rotation shaft 32 passes through the second through hole 421 and is connected to the swing plate 42.

By adopting the above technical scheme, the second connecting part is rotated, so that the second connecting part can rotate by taking the rotating shaft 32 as an axis, and the second connecting part drives the second swinging part 4 to swing; the first connecting part and the second connecting part are matched for use, so that the connection relationship between the sliding part 3 and the second swinging part 4 is more reliable. And the structure of the boss 31 is adopted, and the swinging plate 42 is inserted in the embedded groove 311 of the boss 31 and can rotate by taking the rotating shaft 32 as a shaft, so that a transmission structure with simple structure and stable rotation is realized, and the swinging stability of the second swinging part 4 is ensured.

Referring to fig. 4 and 5, as a specific embodiment of the box girder spreader according to the present invention, slots 22 are respectively disposed on two sides of the first swing member 2, an insertion block 33 inserted into the slot 22 is disposed on the sliding member 3, and the first swing member 2 and the sliding member 3 are connected by bolts, and the bolt connection portion is disposed along the left and right direction. In order to ensure the bolt connection strength, a plurality of sets of bolts are provided between the first swinging member 2 and the sliding member 3. Moreover, the insertion block 33 is made of a metal material with high strength, the cross-sectional area of the insertion block 33 is equal to or slightly smaller than that of the insertion slot 22, and the cross-sectional area of the insertion slot 22 is half of that of the first swinging member 2, so that the high strength of the insertion slot 22 of the first swinging member 2 is ensured, the high strength of the insertion block 33 is ensured, and the connection relationship between the first swinging member 2 and the insertion block 33 is also ensured.

If the cross-sectional area of the insertion groove 22 is not half of the cross-sectional area of the first swinging member 2, the strength of the insertion groove 22 and the strength of the insertion block 33 will not be uniform, which has the consequence that when the strength of the box girder is high, the insertion groove 22 or the insertion block 33 will be bent, and even the insertion block 33 or the first swinging member 2 will be damaged.

When adjusting the distance between the two sliding members 3, the position of the bolt needs to be strictly controlled, and since the sliding members 3 and the first swinging member 2 are fixedly connected by using a plurality of bolts, the difficulty in controlling the position of the bolt is multiplied. In order to effectively solve the situation that the position of the bolt cannot be determined, please refer to fig. 4, which is a specific embodiment of the box girder lifting appliance provided by the present invention, at least one clamping member 5 is detachably connected to the insertion block 33, the clamping member 5 is located between the sliding member 3 and the first swinging member 2, and the clamping member 5 is used for limiting the sliding of the sliding member 3 to the first swinging member 2. Specifically, when the bolt is tightened, two sides of the clamping piece 5 are respectively abutted against the sliding piece 3 and the first swinging piece 2, so that the clamping piece 5 can limit the sliding piece 3 to slide towards the first swinging piece 2, a constructor can directly screw the bolt into a state incapable of being continuously screwed, the distance between the two sliding pieces 3 is related to the width of the preset clamping piece 5, and the larger the width of the clamping piece 5 is, the larger the distance between the two sliding pieces 3 is.

Referring to fig. 6, as a specific embodiment of the box girder hanger provided by the present invention, the clip 5 includes a butt plate 51 abutting against both sides of the insertion block 33, and a connecting plate 52 disposed on the top surface of the insertion block 33, both sides of the connecting plate 52 are connected to the top end of the butt plate 51; that is, the card member 5 is caught on the insertion block 33 to prevent the card member 5 from sliding along the surface of the insertion block 33. A handle for being held by a constructor is arranged above the clamping piece 5, so that the constructor can conveniently connect the clamping piece 5 to the insertion block 33.

According to the above, there is a direct relationship between the distance between the sliding member 3 and the first swinging member 2 and the preset width of the clamping member 5, which is now explained in conjunction with the specifications of the small, medium and large box girders in the prior art.

Since the greater the width of the snapping piece 5, the greater the distance between the sliding piece 3 and the first oscillating piece 2, when the snapping piece 5 is not provided and the side wall of the sliding piece 3 is engaged with the side wall of the first oscillating piece 2, the distance between the two sliding pieces 3 is at a minimum, while the second oscillating piece 4 is used for connecting with the small box girder; that is, when the side wall of the sliding member 3 is engaged with the side wall of the first swinging member 2, the distance between the suspension rods 200 connected to the second swinging members 4 on both sides is 3.4 meters. During the setting, the bolt between the sliding part 3 and the first swinging part 2 can be screwed, which is very convenient.

The above description describes that the second swinging member 4 is used for connecting with the small box girder when the clamping member 5 is not provided; for the medium-sized and large-sized box girders, it is necessary to keep the sliding member 3 at a certain distance from the first swinging member 2, that is, to slide the sliding member 3 at a certain distance in the left-right direction, in order to enable the second swinging member 4 to be connected thereto. When a clamping piece 5 is arranged, the second swinging piece 4 can be used for connecting with a medium-sized box girder or a large-sized box girder; when two catches 5 are provided, the second swing member 4 can be used in connection with a large box girder.

Specifically, when one card member 5 is provided, the width of the card member 5 is 0.13 m or 0.2 m. At the moment, when the width of the clamping piece 5 is 0.13 m, the distance between the hanging rods 200 at the two sides is 3.66 m, and the centering box girder can be connected; when the width of the clamping piece 5 is 0.2 m, the distance between the hanging rods 200 on the two sides is 3.8 m, and the large box girder can be connected. When the two clamping pieces 5 are arranged, the width of each clamping piece 5 is 0.13 meter and 0.07 meter, the distance between the hanging rods 200 on the two sides is 3.8 meters, and the large box girder can be connected.

In order to strengthen the connection relation between the clamping member 5 and the insertion block 33, thereby avoiding the clamping member 5 to fall off on the insertion block 33, please refer to fig. 4, as the utility model provides a specific implementation of a box girder sling, the top surface of the insertion block 33 is equipped with the spacing groove 331, is provided with the gag lever post 53 that is used for inserting the spacing groove 331 on the bottom surface of clamping member 5 fixedly, and the gag lever post 53 inserts the spacing groove 331, thereby plays and prevents clamping member 5 along the gliding effect of insertion block 33 upper surface.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A box girder spreader, comprising:

2. A box girder spreader according to claim 1, wherein the recess is provided with a fixing shaft extending in a front-rear direction, and the protrusion is provided with a first through hole extending in the front-rear direction; the fixed shaft penetrates through the first through hole, and the protruding portion swings around the fixed shaft.

3. A box girder spreader according to claim 1, wherein the sliding member is provided at a bottom surface thereof with a first connecting portion, and the second swinging member is provided with a second connecting portion, and the first connecting portion and the second connecting portion are connected by a rotating shaft.

4. A box girder spreader according to claim 3, wherein the first connecting portion includes two sets of bosses spaced apart in the left-right direction, and the bosses are provided with insertion grooves having openings facing downward;

5. A box girder spreader according to claim 1, wherein the first swinging member is provided at both sides thereof with insertion slots, respectively, and the sliding member is provided with insertion blocks inserted into the insertion slots; the first swinging piece is connected with the sliding piece through a bolt.

6. A box girder spreader according to claim 5, wherein at least one catch is detachably attached to the insert, the catch being located between the sliding member and the first swinging member, the catch being adapted to limit the sliding movement of the sliding member towards the first swinging member.

7. A box girder spreader according to claim 6, wherein the clamper comprises abutment plates abutting both sides of the insert block, and connection plates provided on the top surface of the insert block, both sides of the connection plates being connected to the top ends of the abutment plates.

8. A box girder spreader according to claim 6, wherein: the top surface of the insertion block is provided with a limiting groove, and a limiting rod used for being inserted into the limiting groove is fixedly arranged on the bottom surface of the clamping piece.