Rack for hoisting three-hinged arched girder in limited space

Abstract

The utility model provides a rack for hoisting a three-hinged arched girder in a limited space, which comprises a rack body, a support column and a limit component, the rack body comprises four numerical section steel upright posts, a connecting beam is arranged between the tops of two adjacent section steel upright posts, a connecting strip is arranged between the bottoms of two adjacent section steel upright posts, and the limit component is arranged on the support column. A supporting table is arranged on the two oppositely-arranged connecting beams, the supporting table is in a human shape, a fixing assembly used for fixing a three-hinged arched beam is arranged on the supporting table, the two supporting columns are symmetrically arranged on the two sides of the rack body, the tops of the supporting columns are connected with the supporting table, and the limiting assembly is arranged on the rack. And the limiting assembly is used for limiting deviation of the three-hinged arched girder on the supporting table, and the problem that in the prior art, when the three-hinged arched girder is hoisted and installed, the angles of the two connecting sections of the three-hinged arched girder can be changed, and the installation precision is affected is solved.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary hoisting technology, and in particular to a hoisting platform for a three-hinged arch beam in a confined space. Background Technology

[0002] When constructing a single secondary structure (building structure) within the completed initial tunnel support, it is necessary to construct a precast reinforced concrete triangular arch beam roof truss in the tunnel arch area. The distance between the tunnel top and the initial support is approximately 0.5 to 0.8 meters. Due to the limitations of the tunnel top space height and width, it is extremely difficult to hoist the three-hinged arch beam in the tunnel arch area using conventional hoisting equipment. Therefore, a folding arm crane is often used for hoisting.

[0003] Currently, when using a folding boom crane to hoist a three-hinged arch beam, the beam is wound and tied with steel wire rope before hoisting. Because the two connecting sections of the triangular arch beam are hinged, the connecting sections of the three-hinged arch beam are prone to deflection around the hinge end due to gravity during hoisting. After hoisting to the predetermined height, workers often need to adjust the included angle between the two connecting sections of the three-hinged arch beam multiple times to ensure the installation accuracy when installing the three-hinged beam, which is very labor-intensive. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hoisting platform for three-hinged arch beams in a confined space. This platform solves the problem that the angle between the two connecting sections of a three-hinged arch beam changes during hoisting and installation, affecting the installation accuracy.

[0005] According to an embodiment of this utility model, a platform for hoisting a three-hinged arch beam in a confined space includes a platform body, support columns, and limiting components. The platform body includes four steel columns arranged in numerical order. A connecting beam is provided between the tops of two adjacent steel columns, and a connecting strip is provided between the bottoms of two adjacent steel columns. Support platforms are provided on two oppositely arranged connecting beams. The support platforms are human-shaped and are provided with fixing components for fixing the three-hinged arch beam. There are two support columns, which are symmetrically arranged on both sides of the platform body. The tops of the support columns are connected to the support platforms. The limiting components are arranged on the platform and are used to limit the displacement of the three-hinged arch beam on the support platforms.

[0006] Compared with the prior art, this utility model has the following advantages: by setting a herringbone-shaped support platform on the top of the frame body, the three-hinged arch beam is placed on the support platform and then centered and limited by the limiting component to prevent the three-hinged arch beam from shifting. When the support platform supports the three-hinged arch beam, it also prevents the two connecting sections of the three-hinged arch beam from rotating. The three-hinged arch beam is fixed by the fixing component, and then the three-hinged arch beam and the frame are hoisted as a whole. Thus, when the three-hinged arch beam is hoisted to the predetermined height for installation, it maintains a specific state, so that the accuracy of the three-hinged arch beam after installation is guaranteed.

[0007] Furthermore, the fixing components include a lower clamp and an upper clamp. The lower clamp is adapted to the shape of the support platform and is detachably connected to the support platform. The upper clamp is also adapted to the shape of the support platform and is locked to the lower clamp by a locking component. The upper clamp and the lower clamp are provided with receiving space on opposite sides for accommodating the three-hinged arch beam.

[0008] Furthermore, the locking assembly includes: several bolts, and at least one connecting lug symmetrically provided on both sides of the upper clamp and the lower clamp. Each connecting lug has a through hole for the bolt to pass through, and each bolt is screwed with a nut after passing through the through hole.

[0009] Furthermore, the limiting component includes: limiting posts, symmetrically provided grooves on the top of the platform, each groove containing a symmetrically and slidably provided limiting post, each groove containing a rotatably provided bidirectional lead screw, both ends of each bidirectional lead screw being threadedly connected to two limiting posts, and one end of the lead screw passing through the groove and having a handle.

[0010] Furthermore, each support column is connected to a diagonal brace by a connecting strip.

[0011] Furthermore, several arc-shaped grooves are provided at the bottom of each connecting beam.

[0012] Furthermore, the steel columns are made of I-beams. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0014] Figure 2 This is a front view of an embodiment of the present utility model.

[0015] Figure 3 This is a schematic diagram of the bidirectional lead screw installation according to an embodiment of the present invention.

[0016] In the above attached figures: 1. Platform body; 101. Steel column; 102. Connecting beam; 103. Connecting strip; 2. Support platform; 3. Support column; 4. Lower clamp; 5. Upper clamp; 6. Bolt; 7. Connecting lug; 8. Nut; 9. Limiting column; 10. Two-way screw rod; 11. Handle; 12. Diagonal brace; 13. Arc groove. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-2As shown, this utility model embodiment proposes a platform for hoisting a three-hinged arch beam in a confined space, including a platform body 1, support columns 3, and limiting components. The platform body 1 includes four steel columns 101 arranged in numerical order. A connecting beam 102 is provided between the tops of two adjacent steel columns 101, and a connecting strip 103 is provided between the bottoms of two adjacent steel columns 101. A support platform 2 is provided on the two oppositely arranged connecting beams 102. The support platform 2 is human-shaped and is provided with a fixing component for fixing the three-hinged arch beam. There are two support columns 3, which are symmetrically arranged on both sides of the platform body 1. The top of the support column 3 is connected to the support platform 2. The limiting components are arranged on the platform and are used to limit the displacement of the three-hinged arch beam on the support platform 2. When using this device, the platform body 1 is on the ground. The operator hinges the two connecting sections of the three-hinged arch beam together and then places the three-hinged arch beam on the support platform 2. Since the support platform 2 is A-shaped, the two connecting sections of the three-hinged arch beam are positioned at opposite ends of the support platform 2. The two connecting sections of the three-hinged arch beam extend beyond the support platform 2 to facilitate subsequent connection to the predetermined positions. The support column 3 provides auxiliary support to both ends of the three-hinged arch beam. The limiting component positions the three-hinged arch beam at the center of the platform body 1 while preventing it from shifting on the support platform 2. Finally, the fixing component secures the three-hinged arch beam. After the three-hinged arch beam is fixed, the wire rope from the folding boom crane is wound around the three-hinged arch beam and the platform body 1. The folding boom crane is then used to hoist the three-hinged arch beam, along with the platform body 1, to the predetermined height. After connecting both ends of the three-hinged arch beam to the building at the predetermined location, the wire rope from the folding boom crane is removed, and the platform body 1 is separated from the three-hinged arch beam. It should be noted that when separating the wire rope and the platform body 1 from the three-hinged arch beam, the worker stands on the tunnel trolley to perform the operation, thus preventing the suspended platform body 1 from falling to the ground, ensuring construction safety and facilitating subsequent use. This device assists in the hoisting of the three-hinged arch beam. Firstly, workers can hinge the two ends of the three-hinged arch beam from the ground, making the connection process convenient and requiring only one subsequent hoisting operation. Secondly, when the connected three-hinged arch beam is fixed by the fixing components, the included angle between the two connecting sections of the three-hinged arch beam is also fixed. This ensures that when the three-hinged arch beam is hoisted to the predetermined position for connection, the included angle between the two connecting sections of the three-hinged arch beam will not change, meeting the accuracy requirements.

[0019] like Figure 1-2As shown, the fixing assembly further includes a lower clamp 4 and an upper clamp 5. The lower clamp 4 is adapted to the shape of the support platform 2 and is detachably connected to the support platform 2. The upper clamp 5 is also adapted to the shape of the support platform 2 and is locked to the lower clamp 4 by a locking assembly. Both the upper clamp 5 and the lower clamp 4 have accommodating spaces on opposite sides for accommodating the three-hinged arch beam. The lower clamp 4 is located on the top of the support platform 2, and its detachable design can accommodate three-hinged beams of different sizes. In this embodiment, both the upper clamp 5 and the lower clamp 4 have concave cross-sections. When fixing the three-hinged arch beam to the support platform 2, the three-hinged arch beam is placed on the lower clamp 4, then the upper clamp 5 is placed on top of the lower clamp 4, and finally, the upper clamp 5 and the lower clamp 4 are locked together by the locking assembly to fix the three-hinged arch beam to the support platform 2. It should be noted that the included angle between the two connecting sections of the three-hinged arch beam is known. Therefore, when fabricating the herringbone-shaped support platform 2, the shape of the support platform 2 is adapted to the three-hinged arch beam at the required angle, and the upper clamp 5 and lower clamp 4 are also adapted to the three-hinged arch beam at a specific angle, thereby allowing the three-hinged arch beam fixed on the support platform 2 to maintain the required angle. In this embodiment, when the steel wire rope is loosened and removed from the platform after the two connecting sections of the three-hinged arch beam are fixed at a predetermined height, it is not necessary to remove the upper clamp 5 and lower clamp 4. The angle of the two connecting sections of the three-hinged arch beam is fixed by the upper clamp 5 and lower clamp 4, and they can be removed after subsequent construction procedures are completed. Preferably, the support platform 2 is provided with a receiving groove for accommodating the lower clamp 4.

[0020] like Figure 1-2 As shown, the locking assembly further includes: several bolts 6, and at least one connecting lug 7 symmetrically provided on both sides of the upper clamp 5 and the lower clamp 4. Each connecting lug 7 has a through hole for the bolt 6 to pass through, and each bolt 6 is screwed with a nut 8 after passing through the through hole. In this embodiment, two connecting lugs 7 are symmetrically provided on both sides of the upper clamp 5 and the lower clamp 4. When locking the upper clamp 6 to the lower clamp 4, one end of the bolt 6 is first inserted from bottom to top through the through hole of the connecting lug 7 of the lower clamp 4 into the through hole of the corresponding connecting lug 7 of the upper clamp 5, and then locked with the nut 8. The operation is repeated to lock the four bolts 6 at the four corners respectively.

[0021] like Figure 3As shown, the limiting component further includes: limiting posts 9; symmetrical grooves are provided on the top of the platform; each groove contains symmetrically and slidably positioned limiting posts 9; each groove contains rotatably positioned bidirectional screw rods 10; both ends of each bidirectional screw rod 10 are threadedly connected to two limiting posts 9; one end of the screw rod extends out of the groove and is provided with a handle 11. In this embodiment, the grooves are provided on the connecting beam 102 directly below the three-hinged arch beam; two limiting posts 9 are vertically and slidably positioned in each groove; one end of the bidirectional screw rod 10 extends out of the connecting beam 102 and the steel column 101 and is provided with a handle 11, allowing the worker to rotate the bidirectional screw rod 10 by rotating the handle 11. When the bidirectional screw rod 10 rotates, the corresponding two limiting posts 9 move towards or away from each other. According to the width of the three-hinged arch beam to be installed, the spacing between the two limiting posts 9 on the same connecting beam 102 is adjusted to match the width of the three-hinged arch beam, allowing this device to be applied to different engineering constructions.

[0022] like Figure 1-2 As shown, furthermore, each support column 3 is connected to the connecting strip 103 by a diagonal brace 12. The diagonal brace 12 improves the connection strength between the support column 3 and the platform body 1, making the auxiliary support capacity of the support column 3 stronger. In this embodiment, the connecting strip 103 is an angle steel, and the corner of the angle steel is set away from the platform body 1. Each support column 3 has a horizontal connecting plate on the side facing the platform body 1. One end of the diagonal brace 12 is connected to the corner of the angle steel, and the other end is connected to the corner formed by the connecting plate and the support column 3.

[0023] like Figure 1-2 As shown, furthermore, each connecting beam 102 has several arc-shaped grooves 13 at its bottom. In order to stably hoist the platform body 1 and the three-hinged arch beam, when the wire rope on the folding arm crane is wound around the platform body 1, the wire rope can be inserted into the arc-shaped grooves 13, so that the wire rope is more securely tied to the platform body 1 and is less likely to slip.

[0024] like Figure 1-2 As shown, the steel column 101 is further defined as an I-beam. In this embodiment, the two ends of the connecting strip 103 connecting two adjacent I-beams are respectively inserted into the grooves of the I-beams, and the connecting strip 103 is welded to the I-beams, making the overall structure of the device more compact while also providing sufficient support strength.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A gantry for hoisting a three-hinged arch beam in a confined space, characterized in that, The utility model relates to a three-hinged arch beam fixing device of a crane, which comprises a crane body (1) and a support column (3). The crane body (1) comprises four numerical setting type steel columns (101), connecting beams (102) are arranged between the top portions of adjacent two type steel columns (101), connecting strips (103) are arranged between the bottom portions of adjacent two type steel columns (101), support tables (2) are arranged on the oppositely arranged two connecting beams (102), the support tables (2) are in the shape of a human body, and fixing assemblies for fixing three-hinged arch beams are arranged on the support tables (2). The support column (3) is arranged symmetrically on the two sides of the crane body (1), and the top portion of the support column (3) is connected with the support table (2). A limiting assembly is arranged on the crane body, and the limiting assembly is used for limiting the deviation of the three-hinged arch beam on the support table (2).

2. A gantry for hoisting a three-hinged arch beam in a confined space as claimed in claim 1, wherein, The fixing assembly comprises a lower clamp (4) and an upper clamp (5), the lower clamp (4) is matched with the shape of the support table (2) and is detachably connected with the support table (2), the upper clamp (5) is also matched with the shape of the support table (2) and is locked with the lower clamp (4) through a locking assembly, and the opposite sides of the upper clamp (5) and the lower clamp (4) are each provided with a containing space for containing the three-hinged arch beam.

3. A gantry for hoisting a three-hinged arch beam in a confined space as claimed in claim 2, wherein, The locking assembly comprises a plurality of bolts (6), at least one connecting lug (7) is symmetrically arranged on the two sides of the upper clamp (5) and the lower clamp (4), a through hole is formed in each connecting lug (7) and used for allowing the bolt (6) to pass through, and a nut (8) is screwed on each bolt (6) after the bolt (6) passes through the through hole.

4. A gantry for hoisting a three-hinged arch beam in a confined space as recited in claim 1, wherein The limiting assembly comprises a limiting column (9), a sliding groove is symmetrically formed in the top portion of the crane body, the limiting column (9) is symmetrically and slidably arranged in each sliding groove, a bidirectional screw rod (10) is rotatably arranged in each sliding groove, the two ends of each bidirectional screw rod (10) are threadedly connected with the two limiting columns (9), and a handle (11) is arranged on one end of the screw rod and protrudes out of the sliding groove.

5. A gantry for hoisting a three-hinged arched beam in a confined space as recited in claim 1, wherein An inclined brace (12) is connected between each support column (3) and the connecting strip (103).

6. A gantry for hoisting a three-hinged arched beam in a confined space as recited in claim 1, wherein A plurality of arc-shaped grooves (13) are formed in the bottom portion of each connecting beam (102).

7. A gantry for hoisting a three-hinged arched beam in a confined space as recited in claim 1, wherein The type steel column (101) is an I-beam.

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