Auxiliary supporting device for upside-down construction of vertical large-height-difference air pipe

Abstract

The utility model relates to an auxiliary supporting device for upside-down construction of a vertical large-height-difference air pipe, which effectively solves the problem of overlarge load of a top air pipe in the upside-down construction of the large-height-difference air pipe. According to the technical scheme, the device comprises a plurality of supporting units, each supporting unit comprises a mandrel, a cylindrical air bag is fixed outside the mandrel, the two ends of the air bag are fixedly connected with the mandrel in a sealed mode to form a sealed structure, and a one-way air inlet valve and a remote control electromagnetic exhaust valve are installed at the end of the air bag; the upper end of each mandrel is connected with a lifting rope, the supporting units are connected end to end through the lifting ropes, and the lifting rope of the supporting unit at the uppermost end is connected with the lifting device at the top. Segmented auxiliary pulling force is provided for the air pipe through the multiple supporting units, the problem that the upper air pipe bears too large pulling force due to the fact that middle section supporting cannot be conducted in the air pipe inversion construction process is solved, the safety of the air pipe in the hoisting state in the construction process is guaranteed, and the safety of the air pipe inversion construction is improved.

Description

Technical Field

[0001] This utility model relates to the field of duct construction, specifically an auxiliary support device for the inverted installation of vertical ducts with large elevation differences. Background Technology

[0002] For the installation of air ducts in building shafts, the traditional construction method is to install them section by section upwards, that is, to install the next section of air duct above the existing one. This construction method requires transporting the air ducts to the construction floor one floor at a time, and requires workers to work at heights, which poses a high safety risk and is slow in construction efficiency. Therefore, it is gradually being replaced by inverted installation. The inverted installation process is disclosed in the invention patent application number: CN202310414439.8, which is a method for inverting stainless steel exhaust ducts with large height difference. It uses a lifting device set at the shaft opening to lift the existing air duct section by section as a whole, and connects the next section of air duct to the lower end of the existing air duct.

[0003] The inverted installation process involves installing all ducts on the ground, avoiding high-altitude work and eliminating the need to transport ducts to the working floor, thus reducing safety risks and improving construction efficiency. However, since the installed ducts are constantly being lifted as a whole, it is impossible to set up mid-section support points. Therefore, the installed ducts are suspended in the air throughout the entire construction process. As the number of installed pipe sections increases, the tensile force on the top ducts gradually increases. Especially for high-rise vertical shafts with large duct height differences and many pipe sections, the top ducts may be overloaded, leading to a high risk of breakage. Once a break occurs, the duct will fall, causing a serious construction accident. Summary of the Invention

[0004] This utility model provides an auxiliary support device for the construction of vertical ducts with large elevation differences, which aims to solve the problem of excessive load on the top duct during the construction of vertical ducts with large elevation differences.

[0005] The technical solution includes several support units. Each support unit includes a spindle with a cylindrical airbag fixed to the outside. The two ends of the airbag are sealed and fixed to the spindle to form a sealed structure. The end of the airbag is equipped with a one-way air intake valve and a remote-controlled electromagnetic exhaust valve. A suspension rope is connected to the upper end of each spindle. The support units are connected end to end by the suspension rope. The suspension rope of the uppermost support unit is connected to the lifting device at the top.

[0006] Both ends of the mandrel are stepped shafts, and the outer end journal is thinner. Two pressure plates are coaxially threaded through each end of the mandrel. A nut located outside the pressure plate is screwed onto each end of the mandrel. The end inside the air bladder is sandwiched between the two pressure plates at the same end.

[0007] A sealing ring is installed between the stepped surfaces of the pressure plate and the mandrel.

[0008] Multiple flange-shaped screws are provided between the two pressure plates at the same end, and the screws pass through the airbag sandwiched between the pressure plates.

[0009] The outer wall of the airbag is evenly distributed with four axially distributed pads. After the airbag is inflated, the pads come into contact with the inner wall of the air duct.

[0010] Both ends of the mandrel are provided with rope holes.

[0011] This invention solves the problem of excessive tension on the upper duct due to the inability to provide mid-section support during duct installation by setting support units at intervals inside the duct and using the friction generated by the airbags tightening the inner wall of the duct to provide segmented auxiliary tension to the duct. This ensures the safety of the duct in the hoisting state during construction and improves the safety of duct installation. Attached Figure Description

[0012] Figure 1 This is a three-dimensional view of the supporting unit.

[0013] Figure 2 This is the front sectional view of the support unit.

[0014] Figure 3 This is a top view during the construction process.

[0015] Figure 4 This is a front sectional view during the construction process.

[0016] Figure 5 This is a three-dimensional sectional view during the construction process. Detailed Implementation

[0017] Referring to the accompanying drawings, this utility model includes several support units. Each support unit includes a mandrel 1, and a cylindrical airbag 2 is fixed to the outside of the mandrel 1. The two ends of the airbag 2 are sealed and fixedly connected to the mandrel 1 to form a sealed structure. The end of the airbag 2 is equipped with a one-way air inlet valve 3 and a remote-controlled electromagnetic exhaust valve 4. The airbag 2 is inflated by inflating it through the one-way air inlet valve 3 and vented by expelling air through the remote-controlled electromagnetic exhaust valve 4. The support unit is installed in the air duct, and the inflated airbag 2 tightens the outer wall of the air duct. A suspension rope 5 is connected to the upper end of each mandrel 1. The support units are connected end to end by the suspension rope 5. The suspension rope 5 of the uppermost support unit is connected to the top lifting device. During the installation of the air duct, an airbag 2 is inserted into the air duct after every few sections are installed, and the airbag 2 is inflated. The airbag 2 tightens the inner wall of the air duct, and the friction between the airbag 2 and the inner wall of the air duct provides an upward pulling force to the air duct. Multiple support units are evenly distributed in the air duct to provide multiple segments of pulling force to the air duct.

[0018] Both ends of the spindle 1 are stepped shafts, and the outer end journal is thinner. Two pressure plates 6 are coaxially inserted through each end of the spindle 1. A nut 7 located outside the pressure plate 6 is screwed onto each end of the spindle 1. The end inside the airbag 2 is clamped between the two pressure plates 6 at the same end. The two pressure plates 6 are pressed by the stepped surface of the spindle 1 and the nut 7, thereby clamping the airbag 2.

[0019] A sealing ring 8 is installed between the pressure plate 6 and the stepped surface of the spindle 1 to ensure that the end is sealed and airtight.

[0020] Multiple screws 9 arranged in a flange shape are provided between the two pressure plates 6 at the same end. The screws 9 penetrate the airbag 2 sandwiched between the pressure plates 6. The screws 9 can increase the clamping force of the two pressure plates 6 to ensure that the airbag 2 is clamped. At the same time, the screws 9 penetrating the airbag 2 can also provide some auxiliary limit for the airbag 2.

[0021] The outer wall of the airbag 2 is evenly distributed with four axially distributed pads 10. After the airbag 2 is inflated, the pads 10 come into contact with the inner wall of the air duct. The pads 10 can increase the friction between the airbag and the air duct, and at the same time, they can protect the airbag 2.

[0022] Both ends of the spindle are provided with rope holes 11 for connecting the suspension rope 5.

[0023] During the inverted installation of the ductwork, when installing the first duct section, a set of support units is inserted into the first duct section, the first duct section is connected to the lifting device, and the hoisting rope 5 of the support unit is connected to the lifting device, ensuring that the hoisting rope 5 is taut. Then, the airbag 2 is inflated, so that the pad 10 on the outer wall of the airbag 2 tightens the inner wall of the duct. The hoisting rope 5 of the next set of support units is pre-connected to the lower end of the spindle 1 of the first set of support units. Then, the ductwork and support units are lifted synchronously. The ductwork is lifted by the dual tension of the lifting device and the airbag 2. After lifting one duct section, the second duct section is installed at the lower end of the first duct section, and so on, for ductwork installation.

[0024] After installing 6 to 10 duct sections, insert the second set of support units into the lowest newly installed duct section and tighten the suspension rope 5 of the support unit. Then, inflate the air bladder 2 of the support unit to tighten the inner wall of the duct. Continue in this manner, installing a set of support units every 6 to 10 duct sections until all ducts are installed.

[0025] After the duct is installed and the middle section support is fixed, the support unit can be removed. Specifically, each remote control electromagnetic exhaust valve 4 is opened to release the airbag 2, releasing all the airbags 2 from the inner wall of the duct. Then, each support unit is removed from the upper or lower end of the duct using the lifting device.

[0026] This utility model provides segmented auxiliary tension to the duct by using several support units, which solves the problem of excessive tension on the upper duct due to the inability to provide mid-section support during duct inversion construction, ensuring the safety of the duct in the hoisting state during construction and improving the safety of duct inversion construction.

Claims

1. A vertical duct with a large elevation difference in reverse installation construction auxiliary support device, characterized in that, It includes several support units. Each support unit includes a spindle (1). A cylindrical airbag (2) is fixed outside the spindle (1). The two ends of the airbag (2) are sealed and fixedly connected to the spindle (1) to form a sealed structure. The end of the airbag (2) is equipped with a one-way air inlet valve (3) and a remote control electromagnetic exhaust valve (4). A suspension rope (5) is connected to the upper end of each spindle (1). The support units are connected end to end through the suspension rope (5). The suspension rope (5) of the uppermost support unit is connected to the lifting device at the top.

2. The auxiliary support device for inverted construction of vertical ducts with large elevation differences according to claim 1, characterized in that, Both ends of the spindle (1) are stepped shafts, and the outer end journal is thinner. Two pressure plates (6) are coaxially inserted at each end of the spindle (1). A nut (7) located outside the pressure plate (6) is screwed onto each end of the spindle (1). The end inside the airbag (2) is sandwiched between the two pressure plates (6) at the same end.

3. The auxiliary support device for inverted construction of vertical ducts with large elevation differences according to claim 2, characterized in that, A sealing ring (8) is installed between the stepped surfaces of the pressure plate (6) and the spindle (1).

4. The auxiliary support device for inverted construction of vertical ducts with large elevation differences according to claim 2, characterized in that, Multiple screws (9) arranged in a flange shape are provided between the two pressure plates (6) at the same end, and the screws (9) pass through the airbag (2) sandwiched between the pressure plates (6).

5. The auxiliary support device for inverted construction of vertical ducts with large elevation differences according to claim 1, characterized in that, The outer wall of the airbag (2) is evenly distributed with four axially distributed pads (10). After the airbag (2) is inflated, the pads (10) come into contact with the inner wall of the air duct.

6. The auxiliary support device for inverted construction of vertical ducts with large elevation differences according to claim 1, characterized in that, Both ends of the spindle (1) are provided with rope holes (11).

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