Construction platform for cutting off large-diameter steel casing

Abstract

The utility model discloses a construction platform used for cutting off a large-diameter steel casing, the distance between the edge of a base and the inner wall of the steel casing is small, the construction platform does not need to swing in the construction process, a fixing assembly is arranged on the base, and the fixing assembly abuts against the steel casing to prevent the construction platform from swinging. And the cutting position can be accurately positioned conveniently, and construction inconvenience and safety risks caused by swinging are prevented.

Description

Technical Field

[0001] This utility model belongs to the field of engineering construction technology, specifically relating to a construction platform for cutting off large-diameter steel casings. Background Technology

[0002] After the offshore steel pipe composite pile is poured, the steel casing is usually cut to a certain elevation to facilitate subsequent construction. There are two methods for cutting the steel casing: one is to cut it from the inside of the casing, and the other is to cut it from the outside. For large-diameter steel casings, cutting from the outside is time-consuming, labor-intensive, and unsafe, so the method of cutting from the inside is generally used. Therefore, an operating platform that can be accurately positioned and facilitates construction is particularly important.

[0003] The traditional method for removing casings involves lowering workers into a suspended platform to the designated location, measuring and marking the area to be cut, and then using oxy-fuel cutting to remove the steel casing. This method has the following drawbacks: the suspended platform is relatively small, requiring the platform to be swung to keep workers within the cutting distance, which is time-consuming, labor-intensive, and inconvenient; the constant swaying of the platform makes precise positioning difficult; and there is a risk of workers falling into the hole. Utility Model Content

[0004] The purpose of this utility model is to provide a construction platform for cutting large-diameter steel casings. The distance between the edge of the base and the inner wall of the steel casing is small, so there is no need to swing the construction platform during construction. The base is equipped with a fixing component, which abuts against the steel casing to prevent the construction platform from swinging. This facilitates precise positioning of the cutting position and prevents construction inconvenience and safety risks caused by swinging.

[0005] The technical solution of this utility model is as follows:

[0006] A construction platform for cutting large-diameter steel casings, which is suspended inside the steel casing by steel cables, includes a circular base and at least three fixing components spaced apart on the outer periphery of the ring base;

[0007] The difference in diameter between the base and the steel casing is 100-400mm;

[0008] The fixing assembly includes a guide sheath, a sliding fixing block, and a locking bolt. The top of the guide sheath has a screw hole. The guide sheath is fixedly mounted on the base. A channel is formed between the guide sheath and the base in the radial direction of the base. The sliding fixing block is slidably sleeved with the guide sheath. The locking bolt is located on the screw hole.

[0009] The locking bolts and screw holes can be used to lock the sliding block, which can then abut against the inner wall of the steel casing.

[0010] In the above technical solution, after the construction platform is lowered to the designated elevation inside the casing, the sliding fixing block is pushed to the position where it abuts against the steel casing. Then, the locking bolts are used to lock and position the sliding fixing block, thus fixing the construction platform at the designated height. The distance between the edge of the base and the inner wall of the steel casing is small, allowing construction to be carried out without swinging the construction platform. The fixing components can accurately position the cutting location, and the construction platform will not sway from side to side, facilitating precise positioning of the cutting location and preventing construction inconvenience and safety risks caused by swaying.

[0011] In some preferred implementations, the construction platform also includes guardrails mounted on a base. The sidewalls of the guardrails are cylindrical or prismatic, and fixing components are located on the outside of the guardrails. The construction platform may sway from side to side during operation; by installing guardrails on the base, the risk of workers falling can be reduced.

[0012] In some preferred implementations, the construction platform also includes a hoisting assembly, which consists of columns and a top frame;

[0013] The lower end of the post is connected to the outer side of the guardrail, and the shape of the top frame corresponds to that of the guardrail. The outer side of the top frame is connected to the upper end of the post.

[0014] The upper end and top frame have hoisting holes at their overlapping points, through which steel cables are passed to hoist the construction platform.

[0015] Furthermore, the top frame and the side walls of the railing are respectively enclosed in a quadrangular prism shape;

[0016] The hoisting assembly includes four columns, which are respectively set along the four edges of the quadrangular prism.

[0017] In the above technical solution, the columns and the top frame work together to achieve high structural stability during hoisting. In addition, the columns are connected to the outer surface of the guardrail, which can provide structural support for the guardrail.

[0018] In some preferred implementations, the top frame and guardrail are each welded from four sections of angle steel;

[0019] The column is a section of angle steel, which is connected to the top frame and guardrail by welding.

[0020] In some preferred implementations, the guide sheath and sliding fixing block are channel steel, the base is a circular steel plate, and the guide sheath is welded to the base.

[0021] In some preferred implementations, the guide sheath and sliding fixing block are made from channel steel scraps, and the base is welded from steel plate scraps.

[0022] In the above technical solution, the guide sheath, sliding fixing block and base are all made from scrap materials available at the construction site. When steel casing needs to be cut off, it is convenient to make a construction platform on site and the cost is low.

[0023] In some preferred implementations, the above welding is full welding, resulting in a more robust connection between the components.

[0024] In some preferred implementations, the construction platform is made of Q235 steel.

[0025] In some preferred implementations, the difference between the diameter of the base and the diameter of the steel casing is 400 mm.

[0026] This utility model has at least the following beneficial effects:

[0027] 1. The distance between the edge of the base and the inner wall of the steel casing is small, so there is no need to swing the construction platform during construction. The base is equipped with a fixing component, which abuts against the steel casing to prevent the construction platform from swinging. This facilitates precise positioning of the cutting location and prevents construction inconvenience and safety risks caused by swinging.

[0028] 2. By installing guardrails on the base, the risk of construction workers falling can be reduced.

[0029] 3. The columns and top frame work together to provide high structural stability during hoisting. In addition, the columns are connected to the outer side of the guardrail, providing structural support for the guardrail.

[0030] 4. The guide sheath, sliding fixing block and base are all made from scraps available at the construction site, which makes it convenient to make a construction platform on site when steel casing needs to be cut off and the cost is low. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of the construction platform provided in Example 1.

[0032] The reference numerals in the diagram are: 1-base, 2-guide sheath, 3-sliding fixing block, 4-bolt, 5-guardrail, 6-post, 7-top frame, 8-lifting hole. Detailed Implementation

[0033] The technical solution of this utility model will be further explained and described below through specific embodiments.

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0035] Unless otherwise expressly defined, in the claims, description and accompanying drawings of this utility model, the use of directional terms such as "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear" to indicate orientation or positional relationship is based on the orientation and positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0036] Example 1

[0037] A construction platform for cutting steel casings with a diameter of 3000mm, wherein all components are made of Q235 steel. Specifically, the construction platform includes a circular base 1, a fixing assembly, a guardrail 5, and a hoisting assembly;

[0038] The base 1 is welded from four quarter-circle steel plates, and the diameter of the base 1 is 2600mm.

[0039] Four fixing components are equidistantly arranged on the outer circumference of the ring base 1. These fixing components include a guide sheath 2, a sliding fixing block 3, and a locking bolt 4. The top of the guide sheath 2 has a screw hole, and the guide sheath 2 is fixed to the base 1 by full welding, forming a channel running radially through the base 1. The sliding fixing block 3 is slidably sleeved with the guide sheath 2, and can slide radially along the base 1 under the guidance of the channel until it abuts against the inner wall of the steel casing. The locking bolt 4 is located on the screw hole, and the locking bolt 4 and the screw hole cooperate to lock the sliding fixing block 3. In this embodiment, the guide sheath 2 is made of 8# channel steel, and the sliding fixing block 3 is made of 6.3# channel steel.

[0040] The guardrail 5 is made of four 0.9-meter-long L70*6 angle steel sections fully welded together, and its side walls form a regular square prism. The bottom surface of the guardrail 5 is fully welded to the base 1.

[0041] The hoisting assembly includes columns 6 and 66 and a top frame 7. The structure of the top frame 7 is the same as that of the guardrail 5. Columns 6 and 66 are 1.2-meter long L70*6 angle steel. The top frame 7 and the guardrail 5 are arranged opposite each other. The upper and lower ends of columns 6 and 66 are connected to the top frame 7 and the guardrail 5 respectively. Specifically, columns 6 and 66 are arranged along the four edges of a regular square prism and are fully welded to the top frame 7 and the guardrail 5 respectively.

[0042] The upper end of column 6 and top frame 7 are provided with hoisting holes 8 at the overlapping part of the two. Steel cables pass through the hoisting holes 8 to hoist the construction platform.

[0043] The following describes the construction process for cutting the steel casing using the construction platform provided in this embodiment:

[0044] 1. Construction workers enter the guardrail 5, and steel cables pass through the hoisting hole 8 to hoist the construction platform and the crane. The crane then lowers the construction platform to the designated elevation inside the steel casing.

[0045] 2. The construction workers push the sliding fixing block 3 away from the guardrail 5 until the sliding fixing block 3 abuts against the inner wall of the steel casing. The locking bolt 4 engages with the screw hole to fix the position of the sliding fixing block 3. The construction platform is fixed in the designated position inside the steel casing and will not sway left or right.

[0046] 3. Construction workers can walk out of guardrail 5 and cut off the steel casing along base 1.

[0047] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model patent and the contents of the specification should still fall within the scope of the present utility model.

Claims

1. A construction platform for cutting large-diameter steel casings, suspended inside the steel casing by steel cables, characterized in that, It includes a circular base and at least three fixing components spaced apart around the outer periphery of the base; The difference between the diameter of the base and the diameter of the steel casing is 100-400mm; The fixing assembly includes a guide sheath, a sliding fixing block, and a locking bolt. The top of the guide sheath has a screw hole. The guide sheath is fixedly mounted on the base. A channel is formed between the guide sheath and the base, which runs through the radial direction of the base. The sliding fixing block is slidably sleeved with the guide sheath. The locking bolt is located in the screw hole. The locking bolt and the screw hole can cooperate to lock the sliding fixing block, and the sliding fixing block can abut against the inner wall of the steel casing.

2. The construction platform as described in claim 1, characterized in that, It also includes a guardrail, which is mounted on the base, and the sidewalls of the guardrail are cylindrical or prismatic, with the fixing component located on the outside of the guardrail.

3. The construction platform as described in claim 2, characterized in that, It also includes a hoisting assembly, which comprises columns and a top frame; The lower end of the post is connected to the outer side of the guardrail, the shape of the top frame corresponds to the guardrail, and the outer side of the top frame is connected to the upper end of the post. The upper end and the top frame have hoisting holes at their overlapping parts, and the steel cable passes through the hoisting holes to hoist the construction platform.

4. The construction platform as described in claim 3, characterized in that, The top frame and the side walls of the guardrail are respectively enclosed in a quadrangular prism shape; The hoisting assembly includes four columns, which are respectively arranged along the four edges of the quadrangular prism.

5. The construction platform as described in claim 4, characterized in that, The top frame and the guardrail are each welded from four sections of angle steel. The column is a section of angle steel, and it is connected to the top frame and the guardrail by welding.

6. The construction platform as described in claim 1, characterized in that, The guide sheath and the sliding fixing block are made of channel steel, the base is a circular steel plate, and the guide sheath is welded to the base.

7. The construction platform as described in claim 6, characterized in that, The guide sheath and the sliding fixing block are made of channel steel scrap, and the base is welded from steel plate scrap.

8. The construction platform as described in any one of claims 5-7, characterized in that, The welding is a full weld.

9. The construction platform as described in any one of claims 5-7, characterized in that, Made of Q235 steel.

10. The construction platform as described in claim 1, characterized in that, The difference between the diameter of the base and the diameter of the steel casing is 400 mm.

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