A method for installing a steel ladder in a confined space

Abstract

This invention discloses a method for installing a steel ladder in a confined space, comprising the following steps: Step 1, drilling a hole in the floor slab; Step 2, installing protective components and lifting rings; Step 3, installing various lifting structures; Step 4, connecting each lifting structure to the lifting rings on the steel ladder to be installed; Step 5, hoisting the steel ladder to be installed into place; Step 6, installing and fixing the steel ladder; Step 7, removing the equipment and sealing the hole. By drilling a hole in the floor slab of the floor above the steel ladder, and installing a lifting device on the upper floor to complete the hoisting of the steel ladder, and by installing a diagonal bracing device on the side of the reserved stairwell away from the steel ladder, the positioning of the steel ladder after hoisting is facilitated. Hoisting can be completed without large hoisting equipment, allowing for the quick installation of heavy steel ladders even in space-constrained conditions. The installation of hole protective components and edge protective components prevents damage to the upper floor slab by the lifting ropes during the hoisting of the steel ladder.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and specifically to a method for installing a steel ladder in a confined space. Background Technology

[0002] In building construction, the traditional installation of prefabricated steel ladders involves installing lifting rings on the steel ladder, then using large hoisting equipment to lift the steel ladder, and manually calibrating the position of the steel ladder to complete the installation.

[0003] In the Hengdian Station steel structure project, due to construction requirements, it was impossible to install all the steel ladders initially. Therefore, the initial construction involved fixing and installing a portion of the ladders, with the other half stacked on top of the pre-installed ladders. However, in subsequent construction, the surrounding buildings were completed, necessitating the installation of the remaining half of the ladders in a relatively confined indoor space. Large hoisting equipment could not access the space to lift this remaining section of the ladders. The remaining ladders are 3.1 meters wide, 24.3 meters long, and weigh 28.9 tons, making construction extremely difficult without large hoisting equipment. Therefore, a method for installing steel ladders in confined spaces is urgently needed to solve problems similar to those encountered in this project. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention presents a method for installing a steel ladder in a confined space, comprising the following steps: Step 1: Drilling a hole in the floor slab, determining the hole's location based on the intended location of the steel ladder; Step 2: Installing a hole protector inside the hole, installing an edge protector at the edge of the floor slab, and installing lifting rings on the steel ladder; Step 3: Installing a lifting device and a scissor pull device, wherein the lifting device is installed above the hole, and the scissor pull device is installed on the side of the reserved stair opening furthest from the steel ladder; Step 4: Connecting the lifting ropes on the lifting device and the scissor pull device to the lifting rings on the steel ladder, wherein the lifting rope on the scissor pull device is connected to the lifting ring closest to the reserved stair opening; Step 5: Lifting the steel ladder using the lifting device and scissor pull device until it reaches the installation location; Step 6: Installing and securing the steel ladder; Step 7: Removing the lifting rings, hole protectors, edge protectors, lifting device, scissor pull device, and lifting ropes, and sealing the hole in the floor slab.

[0005] Preferably, in step 1, determining the location of the hole based on the location of the steel ladder to be installed includes the following steps: Step 1.1: Determine the location of the hole on the floor slab based on the location of the steel ladder to be installed, and mark the upper and lower surfaces of the hole location on the floor slab; Step 1.2: Install shock absorbers around the marked area on the floor slab; Step 1.3: Make the hole at the marked location; Step 1.4: Remove the shock absorbers.

[0006] Preferably, in step 5, the steel ladder to be installed is hoisted and lifted using a lifting device and an inclined pull device until it is transported to the installation position, including the following steps: Step 5.1: The steel ladder to be installed is lifted upwards using the lifting device until it reaches a predetermined height; Step 5.2: The steel ladder to be installed is pulled towards the reserved stairwell using the inclined pull device until its highest point is at the reserved stairwell; Step 5.3: The steel ladder to be installed is hoisted diagonally upwards using the lifting device and the inclined pull device until its lowest point is higher than the highest point of the already installed steel ladder; Step 5.4: The steel ladder to be installed is hoisted diagonally downwards using the lifting device and the inclined pull device until it is transported to the installation position.

[0007] Preferably, an auxiliary lifting device is also provided on the side of the reserved stairwell near the steel ladder. In step 5, the steel ladder to be installed is hoisted and lifted by the lifting device and the inclined pulling device until it is hoisted to the installation position, including the following steps: Step 5.1: The steel ladder to be installed is lifted upward by the lifting device until it reaches the predetermined height; Step 5.2: The steel ladder to be installed is hoisted towards the reserved stairwell by the inclined pulling device until the highest point of the steel ladder is hoisted to the reserved stairwell; Step 5.3: The auxiliary lifting device is connected to the lifting ring on the steel ladder to be installed; Step 5.4: The steel ladder to be installed is hoisted diagonally upward by the lifting device, the inclined pulling device and the auxiliary lifting device until the lowest point of the steel ladder to be installed is higher than the highest point of the already installed steel ladder; Step 5.5: The steel ladder to be installed is hoisted diagonally downward by the lifting device, the inclined pulling device and the auxiliary lifting device until it is hoisted to the installation position.

[0008] Preferably, the number of lifting devices is multiple.

[0009] Preferably, the hole protection component includes: a first fixing component and a semi-circular protection component; the first fixing component is fixed inside the hole in the floor slab; the semi-circular protection component is fixedly disposed below the first fixing component.

[0010] Preferably, the edge protection component includes: a second fixing component, a connecting component, and a protective pivot; the second fixing component is fixedly installed on the edge of the floor slab; the protective pivot is installed at the bottom of the second fixing component through the connecting component.

[0011] Compared with the closest prior art, the beneficial effects of the present invention are as follows:

[0012] 1. This invention involves making a hole in the floor slab of the floor above the floor where the steel ladder is located, installing a lifting device on the floor above to lift the steel ladder, and then installing a diagonal bracing device on the side of the reserved stair opening away from the steel ladder. This facilitates the placement of the steel ladder after lifting, and the lifting can be completed without large hoisting equipment. It can also quickly install heavy steel ladders in situations where space is limited.

[0013] 2. The hole protection component and the edge protection component of this invention can both reduce friction, thus preventing the lifting rope from damaging the floor slab of the upper floor during the hoisting of the steel ladder and ensuring the construction quality.

[0014] 3. In the process of hoisting the steel ladder, if the pulling force is insufficient due to the excessive angle between the lifting device and the steel ladder, an auxiliary lifting device can be set on the side of the reserved stairwell near the steel ladder. The auxiliary lifting device can play the main load-bearing role at this time, ensuring construction safety. Attached Figure Description

[0015] Figure 1 This is a flowchart illustrating the installation method of the present invention.

[0016] Figure 2 This is a schematic diagram of the first step in the installation of the steel ladder according to the present invention.

[0017] Figure 3 This is a schematic diagram of the second step of installing the steel ladder according to the present invention.

[0018] Figure 4 This is a schematic diagram of the third step in the installation of the steel ladder according to the present invention.

[0019] Figure 5 This is a schematic diagram of the fourth step in the installation of the steel ladder according to the present invention.

[0020] Figure 6 This is a schematic diagram of the fifth step in the installation of the steel ladder according to the present invention.

[0021] Figure 7 This is a schematic diagram of the sixth step in the installation of the steel ladder according to the present invention.

[0022] Figure 8 This is a schematic diagram of the seventh step in the installation of the steel ladder according to the present invention.

[0023] Figure 9 This is a schematic diagram of the hole protection component of the present invention.

[0024] Figure 10 This is a schematic diagram of the edge protection component of the present invention.

[0025] Figure label:

[0026] 1-Installed steel ladder, 2-Steel ladder to be installed, 3-Floor slab, 4-Lifting ring, 5-Hole protective component, 51-First fixing component, 52-Semi-circular protective component, 6-Side protective component, 61-Second fixing component, 62-Connecting component, 63-Protective rotating shaft, 7-Lifting device, 8-Inclined pull device, 9-Lifting rope. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] Example 1

[0029] like Figures 1-10 As shown, the present invention provides a method for installing a steel ladder in a confined space, characterized by comprising the following steps:

[0030] S1. Drill holes in floor slab 3, and determine the location of the holes according to the location of the steel ladder 2 to be installed.

[0031] S1.1. Based on the location of the steel ladder 2 to be installed, determine the opening position on the floor slab 3, and mark the upper and lower sides of the opening position on the floor slab 3.

[0032] S1.2 Install shock-absorbing components around the marked area on floor slab 3.

[0033] S1.3. Make a hole at the marked location.

[0034] S1.4 Remove the shock absorbers.

[0035] S2. Install hole protectors 5 inside the hole, install edge protectors 6 on the edge of the floor slab 3, and install lifting rings 4 on the steel ladder 2 to be installed. The hole protector 5 includes: a first fixing member 51 and a semi-circular protector 52; the first fixing member 51 is fixed inside the hole in the floor slab 3; the semi-circular protector 52 is fixedly positioned below the first fixing member 51. A second fixing member 61, a connecting member 62, and a protective pivot 63 are also included; the second fixing member 61 is fixedly installed on the edge of the floor slab 3; the protective pivot 63 is installed at the bottom of the second fixing member 61 via the connecting member 62. The hole protectors and edge protectors reduce friction, preventing damage to the upper floor slab during the hoisting of the steel ladder and ensuring construction quality.

[0036] S3. Install lifting device 7 and inclined cable tie device 8. Lifting device 7 is installed above the opening, and inclined cable tie device 8 is installed on the side of the reserved stairwell furthest from the steel ladder. Multiple lifting devices 7 are used. By drilling an opening in the floor slab of the floor above the steel ladder, and installing the lifting device on the upper floor, the steel ladder is lifted. Then, by installing the inclined cable tie device on the side of the reserved stairwell furthest from the steel ladder, the steel ladder is easily positioned after lifting. This eliminates the need for large hoisting equipment, allowing for the quick installation of heavy steel ladders even in space-constrained conditions.

[0037] S4. Connect the lifting rope 9 on the lifting device 7 and the lifting rope 9 on the inclined pull device 8 to the hanging ring 4 on the steel ladder 2 to be installed, respectively. The lifting rope 9 on the inclined pull device 8 is connected to the hanging ring 4 closest to the reserved stair opening.

[0038] S5. The steel ladder 2 to be installed is hoisted and lifted by the lifting device 7 and the inclined pull device 8 until it is hoisted to the installation position.

[0039] S5.1 The steel ladder 2 to be installed is lifted upward by the lifting device 7 until the steel ladder 2 to be installed reaches the predetermined height.

[0040] S5.2. The steel ladder 2 to be installed is hoisted towards the reserved stairwell using the inclined pull device 8 until the highest point of the steel ladder 2 to be installed is hoisted to the reserved stairwell.

[0041] S5.3 By using the lifting device 7 and the inclined pull device 8 together, the steel ladder 2 to be installed is hoisted diagonally upward until the lowest point of the steel ladder 2 to be installed is higher than the highest point of the steel ladder 1 already installed.

[0042] S5.4. By using the lifting device 7 and the inclined pull device 8 together, the steel ladder 2 to be installed is hoisted diagonally downwards until it is hoisted to the installation position.

[0043] S6. Install and secure the steel ladder 2 to be installed.

[0044] S7. Remove the lifting ring 4, hole protection component 5, edge protection component 6, lifting device 7, inclined cable device 8 and lifting rope 9, and seal the hole on the floor slab 3.

[0045] Example 2

[0046] The embodiments are basically the same, and the similarities will not be repeated. The differences are as follows:

[0047] An auxiliary lifting device is also installed on the side of the reserved stairwell near the steel ladder.

[0048] In step S5, the steel ladder 2 to be installed is hoisted and lifted using the lifting device 7 and the inclined pull device 8 until it is hoisted to the installation position. This includes the following steps:

[0049] S5.1 The steel ladder 2 to be installed is lifted upward by the lifting device 7 until the steel ladder 2 to be installed reaches the predetermined height.

[0050] S5.2. The steel ladder 2 to be installed is hoisted towards the reserved stairwell using the inclined pull device 8 until the highest point of the steel ladder 2 to be installed is hoisted to the reserved stairwell.

[0051] S5.3 Connect the auxiliary lifting device to the lifting ring 4 on the steel ladder 2 to be installed.

[0052] S5.4. By using the lifting device 7, the inclined pulling device 8 and the auxiliary lifting device in combination, the steel ladder 2 to be installed is hoisted diagonally upward until the lowest point of the steel ladder 2 to be installed is higher than the highest point of the steel ladder 1 already installed.

[0053] S5.5. By using the lifting device 7, the inclined pull device 8 and the auxiliary lifting device in combination, the steel ladder 2 to be installed is hoisted diagonally downward until it is hoisted to the installation position.

[0054] If insufficient tension occurs during the hoisting of the steel ladder due to an excessively large angle between the lifting device and the steel ladder, an auxiliary lifting device can be installed on the side of the reserved stairwell near the steel ladder. The auxiliary lifting device can then play the main load-bearing role, ensuring construction safety.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the pending application of the present invention.

Claims

1. A method for installing a steel ladder in a confined space, characterized in that, Includes the following steps: Step 1: Drill holes in the floor slab (3) and determine the location of the holes according to the location of the steel ladder (2) to be installed; Step 2: Install hole protection (5) inside the hole, install edge protection (6) on the edge of the floor slab (3), and install lifting rings (4) on the steel ladder (2) to be installed. Step 3: Install the lifting device (7) and the inclined pull device (8), wherein the lifting device (7) is installed above the hole and the inclined pull device (8) is installed on the side of the reserved stair opening away from the steel ladder; Step 4: Connect the lifting rope (9) on the lifting device (7) and the lifting rope (9) on the inclined pull device (8) to the hanging ring (4) on the steel ladder (2) to be installed, respectively. The lifting rope (9) on the inclined pull device (8) is connected to the hanging ring (4) closest to the reserved stair opening. Step 5: The steel ladder (2) to be installed is hoisted and lifted by the lifting device (7) and the inclined pull device (8) until the steel ladder (2) to be installed is hoisted to the installation position; Step 6: Install and secure the steel ladder (2) to be installed; Step 7: Remove the lifting ring (4), hole protection (5), edge protection (6), lifting device (7), inclined cable device (8) and lifting rope (9), and seal the holes on the floor slab (3); In step 5, the steel ladder (2) to be installed is hoisted and lifted by the lifting device (7) and the inclined pull device (8) until it is hoisted to the installation position. This includes the following steps: Step 5.1: Use the lifting device (7) to lift the steel ladder (2) to be installed upwards until the steel ladder (2) to be installed reaches the predetermined height; Step 5.2: Use the inclined pull device (8) to pull the steel ladder (2) to be installed towards the reserved stairwell opening, until the highest point of the steel ladder (2) to be installed is lifted to the reserved stairwell opening; Step 5.3: Using the lifting device (7) and the inclined pull device (8) together, the steel ladder (2) to be installed is hoisted diagonally upward until the lowest point of the steel ladder (2) to be installed is higher than the highest point of the steel ladder (1) already installed. Step 5.4: Using the lifting device (7) and the inclined pull device (8) together, the steel ladder (2) to be installed is hoisted downwards at an angle until it is hoisted to the installation position; When an auxiliary lifting device is installed on the side of the reserved stairwell near the steel ladder, In step 5, the steel ladder (2) to be installed is hoisted and lifted using the lifting device (7) and the inclined pull device (8) until it is hoisted to the installation position, including the following steps: Step 5.1: Use the lifting device (7) to lift the steel ladder (2) to be installed upwards until the steel ladder (2) to be installed reaches the predetermined height; Step 5.2: Use the inclined pull device (8) to pull the steel ladder (2) to be installed towards the reserved stairwell opening, until the highest point of the steel ladder (2) to be installed is lifted to the reserved stairwell opening; Step 5.3: Connect the auxiliary lifting device to the lifting ring (4) on the steel ladder (2) to be installed; Step 5.4: Using the lifting device (7), the inclined pull device (8) and the auxiliary lifting device in combination, the steel ladder (2) to be installed is hoisted diagonally upward until the lowest point of the steel ladder (2) to be installed is higher than the highest point of the steel ladder (1) already installed. Step 5.5: Using the lifting device (7), the inclined pull device (8) and the auxiliary lifting device in combination, the steel ladder (2) to be installed is hoisted downwards at an angle until it is hoisted to the installation position.

2. The method for installing a steel ladder in a confined space as described in claim 1, characterized in that, In step 1, the location of the hole is determined according to the location of the steel ladder (2) to be installed, including the following steps: Step 1.1: Based on the location of the steel ladder (2) to be installed, determine the opening position on the floor slab (3) and mark the upper and lower surfaces of the opening position on the floor slab (3); Step 1.2: Install shock absorbers around the marked perimeter on the floor slab (3); Step 1.3: Make a hole at the marked location; Step 1.4: Remove the shock absorbers.

3. The method for installing a steel ladder in a confined space as described in claim 1, characterized in that, The number of lifting devices (7) is multiple.

4. The method for installing a steel ladder in a confined space as described in claim 1, characterized in that, The hole protection component (5) includes: a first fixing component (51) and a semi-circular protection component (52); The first fastener (51) is fixed in a hole in the floor slab (3); The semi-circular protective component (52) is fixedly installed below the first fixing component (51).

5. The method for installing a steel ladder in a confined space as described in claim 1, characterized in that, The edge protection component (6) includes: a second fixing component (61), a connecting component (62), and a protective pivot (63). The second fastener (61) is fixedly installed on the edge of the floor slab (3); The protective pivot (63) is mounted on the bottom of the second fixing member (61) via the connector (62).

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