Internal temporary support frame for large-volume air pipe of subway station and air pipe mounting method

Abstract

The invention relates to the technical field of subway station air pipes, in particular to an internal temporary supporting frame of a subway station large-size air pipe and an air pipe installation method, and the internal temporary supporting frame comprises two opposite climbing frames, a base installed between the two climbing frames, pulley blocks installed on the two sides of the base and dragging ropes installed on the pulley blocks. The base is fixedly installed at the upper end of the climbing frame, the bottom face of the base is connected with the lifting device, the height of the base is controlled through the lifting device so that the base can be close to the installation position of the air pipe, then one end of the dragging rope is tied to the air pipe, the other end of the dragging rope is dragged, the air pipe is driven to move upwards through the pulley block, and then the air pipe is dragged to the base. A constructor climbs to the base through the climbing frame, releases the dragging rope and installs the air pipe, and after installation is completed, the constructor descends through the climbing frame and moves the climbing frame to the next installation position to continue installation, and therefore the air pipe does not need to be hoisted by installing a hanging ring on a ceiling.

Description

Technical Field

[0001] The present application relates to the technical field of subway station air ducts, and in particular to an internal temporary support frame for large-volume subway station air ducts and an air duct installation method. Background Art

[0002] Large-volume air ducts in subway stations occupy an important position in subway construction. They are not only related to the air quality and comfort of the station, but also involve the operating efficiency and safety of the entire ventilation system.

[0003] In the prior art, for the installation of large-volume air ducts, a method usually adopted is to install a lifting ring on the ceiling, install a pulley block on the lifting ring, and use a towing rope to lift the air duct to the installation position. Then the construction workers take the elevator to the bottom surface of the air duct for installation. This causes the lifting ring to be retained on the ceiling, so that subsequent construction either needs to avoid the lifting ring or remove the lifting rings one by one, which is very troublesome. Therefore, there is a need for an internal temporary support frame for large-volume air ducts in subway stations and an air duct installation method. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of this application is to provide an internal temporary support frame and an air duct installation method for large-volume air ducts in a subway station, which are used to solve the technical problem of device accumulation after hoisting the air duct in the prior art.

[0005] The above-mentioned purpose of the present application is achieved through the following technical solutions: an internal temporary support frame for a large-volume air duct in a subway station, comprising two opposing climbing frames, a base installed between the two climbing frames, a pulley block installed on both sides of the base, and a pulling rope installed on the pulley block, wherein the base is fixedly installed on the upper end of the climbing frame, and a lifting device is connected to the bottom surface of the base.

[0006] By adopting the above technical scheme, firstly, the height of the base is controlled by the lifting device to make the base close to the installation position of the air duct, then one end of the pulling rope is tied to the air duct, and then the other end of the pulling rope is dragged to drive the air duct to move upward through the pulley group, and then the air duct is dragged to the base. The construction personnel climb up to the base through the climbing frame, release the pulling rope and install the air duct. After the installation is completed, they come down through the climbing frame and move the climbing frame to the next installation position to continue the installation. In this way, there is no need to install a lifting ring on the ceiling to lift the air duct. Moreover, through the setting of the climbing frame and the pulley group on the base, the construction personnel can install the air duct more efficiently, and the construction can be carried out without installing the lifting ring in advance, and the installation of the air duct can be adjusted by moving the position of the climbing frame, making it more convenient for the construction personnel to install the air duct.

[0007] Furthermore, the base includes a fixed seat and a lifting seat, the fixed seat is fixedly installed between the upper ends of the two climbing frames, the pulley group is installed on the lifting seat, and the lifting device includes a lifting threaded rod vertically threadedly connected to the fixed seat, one end of the lifting threaded rod is fixedly connected to the bottom surface of the lifting seat, and the other end extends to the ground.

[0008] By adopting the above technical solution, the lifting seat is raised by rotating the lifting threaded rod, and the position of the lifting seat after being raised is observed, and then the lifting threaded rod is rotated to adjust the angle of the lifting seat. After the adjustment is completed, the air duct is dragged onto the lifting seat by pulling the rope and the pulley group, and then the construction personnel climb up through the climbing frame to install the air duct.

[0009] Furthermore, the climbing frame includes an upper bracket and a lower bracket, the base is installed between the upper brackets of the two climbing frames, a driving cylinder is installed between the upper bracket and the lower bracket, the driving cylinder is fixedly connected to the lower bracket, and the output end of the driving cylinder faces upward and is fixedly connected to the upper bracket.

[0010] By adopting the above technical scheme, although the setting of the lifting threaded rod can facilitate the construction workers to adjust the height and angle of the installed air duct, if the height of the lifting seat is not enough after adjusting the angle of the lifting seat, rotating the lifting threaded rod will change the angle of the lifting seat, resulting in difficulty in installing the air duct. The climbing frame is set as an upper bracket and a lower bracket and is set by a driving cylinder to solve this technical problem. When the construction workers have adjusted the angle of the lifting seat, but the height of the lifting seat is not enough, the driving cylinder is started to raise the upper bracket, thereby raising the base on the upper bracket, so that the installation angle of the air duct will not be changed when the base is raised. The setting of the driving cylinder can also enable the construction workers to rotate the lifting threaded rod and drag the air duct to the base. If the construction workers find that the height is not enough, they can start the driving cylinder to raise the base for remedy, so that the construction workers have a certain fault tolerance when raising and lowering the base, thereby improving the construction workers' use experience.

[0011] Furthermore, the two climbing frames are divided into an auxiliary climbing frame and a supporting climbing frame, a side of the auxiliary climbing frame away from the supporting climbing frame is vertically mounted with multiple groups of rollers, and a side of the supporting climbing frame away from the auxiliary climbing frame is mounted with a supporting assembly.

[0012] By adopting the above technical solution, although the setting of the climbing frame can make the construction workers more efficient in installing the air duct, when the construction workers drag the air duct to the base by pulling the towing rope, the vertical side of the one of the two climbing frames closer to the air duct will contact the air duct, and the air duct rubs the climbing frame to move to the base, resulting in wear on the surface of the air duct and the surface of the climbing frame. This technical problem is solved by setting the two climbing frames as auxiliary climbing frames and supporting climbing frames. The construction workers drag from the supporting climbing frame, and the towing rope makes the air duct contact the auxiliary climbing frame, and the auxiliary climbing frame is provided with rollers. When the air duct is dragged up, the side close to the auxiliary climbing frame will contact the roller. After the air duct contacts the roller, the roller rotates to reduce the friction on the air duct, making it easier for the construction workers to drag the air duct and reducing the wear on the air duct and the climbing frame; when dragging the air duct, the supporting climbing frame is mainly under pressure, and the supporting assembly can prevent the supporting climbing frame from collapsing.

[0013] Furthermore, the support assembly includes two opposite fixing plates and a support rod installed between the two fixing plates, the two fixing plates are fixedly connected to the supporting climbing frame, one end of the support rod is rotatably connected to the two fixing plates, and the other end abuts the ground.

[0014] By adopting the above technical solution, before dragging the air duct, the support rod is first rotated to make it abut against the ground, and then the air duct is dragged, so that the support rod provides support for the supporting climbing frame to prevent the supporting climbing frame from collapsing.

[0015] Furthermore, the pulley group is arranged on the upper surface of the lifting seat close to the supporting climbing frame, the upper surface of the lifting seat close to the auxiliary climbing frame is provided with a movable pulley, the upper surface of the lifting seat close to the auxiliary climbing frame is provided with a plug interface, the bottom surface of the movable pulley is fixedly connected with a movable seat, the movable seat is plugged into the lifting seat through the plug interface, a support spring is provided between the movable seat and the bottom surface of the plug interface, one end of the support spring is fixedly connected to the bottom surface of the movable seat, and the other end is fixedly connected to the bottom surface of the plug interface.

[0016] By adopting the above technical solution, a pulley block is set at one end of the lifting seat, which may cause uneven force on the entire bracket when dragging the air duct, resulting in easy damage to the climbing frame, and the force of the pulley block set at one end to drag the air duct is insufficient, resulting in difficulty in dragging the air duct. However, if pulley blocks are set at both ends of the lifting seat, the pulley block at one end will block the air duct when dragging the air duct, resulting in the air duct being unable to move to the base but being stuck on the climbing frame. The setting of the movable pulley solves this technical problem. The movable pulley is set at one end of the lifting seat close to the auxiliary climbing frame, and can cooperate with the pulley block to make the air duct easier to move when dragging. The entire bracket is evenly stressed, and the force for dragging the air duct can be increased by the cooperation of the movable pulley and the pulley group; because the movable pulley is arranged on one end of the lifting seat close to the auxiliary climbing frame, when the construction workers drag the air duct and the air duct rises to the position of the movable pulley, the air duct presses the movable pulley so that the movable pulley presses the supporting spring to retract into the plug-in interface, so that the movable pulley will not block the air duct from moving to the lifting seat, and when the air duct is installed and the climbing frame is moved, the movable pulley will be ejected by the supporting spring, allowing it to continue the next work, thereby improving the stability of the bracket and the construction efficiency.

[0017] Furthermore, a through hole that passes through the lifting seat is opened on the side of the plug-in interface away from the pulley block, and a push plate is provided in the through hole, one end of the push plate extends into the through hole, and the other end extends out of the through hole, and rotating shafts extend from both sides of the push plate to be rotatably connected to the lifting seat, and a top block that abuts the movable seat extends upward from the end of the push plate that extends into the through hole, and a supporting structure for supporting the push plate is provided on one side of the push plate.

[0018] By adopting the above technical solution, although the setting of the movable pulley can save the force of dragging the air duct while improving the stability of the bracket, when dragging the air duct, the force of the towing rope on the movable pulley is downward and in the dragging direction. The downward force may cause the movable pulley to retract into the plug-in interface before the air duct rises to the lifting seat, resulting in only the pulley group providing a fulcrum, causing the supporting climbing frame to be subjected to a large force and easy to be damaged. The setting of the push plate solves this technical problem. The top block supports the movable pulley on the bottom surface of the movable seat to provide support The duct is now on the lifting seat, and the fulcrum of the movable pulley is no longer needed. In this way, the movable pulley can provide a fulcrum for the duct before the duct rises to the lifting seat, thereby reducing the force required for dragging the duct.

[0019] Furthermore, the supporting structure includes a connecting plate fixedly connected to one side of the push plate, a receiving port opened on one side of the through port and located above the rotating shaft, and a connecting bending spring arranged between the receiving port and the connecting plate, wherein one end of the connecting bending spring is fixedly connected to the connecting plate, and the other end is fixedly connected to the inner wall of the receiving port.

[0020] By adopting the above technical solution, the connecting spring supports the push plate before the push plate is pushed by the air duct, so that the push plate provides supporting force for the movable pulley. When the air duct pushes the push plate, the push plate rotates and the connecting plate rotates and moves into the storage port to compress the connecting spring. At this time, the air duct is located on the lifting seat, the movable pulley is retracted in the plug-in port, and the push plate is restricted from rotating. After the air duct is installed, the entire bracket is moved, the movable pulley is ejected, and the connecting spring pushes the connecting plate to rotate the push plate, so that the top block re-contacts the movable seat to provide support for the movable pulley.

[0021] Furthermore, the bottom surfaces of the auxiliary climbing frame and the supporting climbing frame are both provided with universal wheels.

[0022] By adopting the above technical solution, the universal wheel facilitates the movement of the entire bracket.

[0023] The method for installing the air duct of the internal temporary support frame of the large-volume air duct of the subway station applied to the above technical solution comprises the following steps: S1. Push the climbing frame to move below the air duct installation position, and turn the lifting threaded rod to adjust the position and angle of the lifting seat; S2. After the adjustment is completed, install the pulling rope on the air duct, and drag the air duct by the pulling rope on one side of the supporting climbing frame to move the air duct to the lifting seat; S3. Observe whether the height of the air duct is convenient for installation. If it is not convenient for installation, start the driving cylinder to adjust the height of the lifting seat. If it is convenient for installation, release the pulling rope installed on the air duct; S4. Install the air duct; S5. After installation is completed, push the climbing frame to move to the next installation point.

[0024] In summary, the present application includes at least one of the following beneficial technical effects.

[0025] 1. Through the arrangement of the base, pulley block, pulling rope and lifting device, the lifting seat is raised by rotating the lifting threaded rod, and then the position of the lifting seat after the lifting is observed, and then the lifting threaded rod is rotated to adjust the angle of the lifting seat. After the adjustment is completed, one end of the pulling rope is tied to the air duct, and then the other end of the pulling rope is dragged to drive the air duct to move upward through the pulley block, and then the air duct is dragged to the base. The construction personnel climb onto the base through the climbing frame, release the pulling rope and install the air duct. After the installation is completed, they come down through the climbing frame and move the climbing frame to the next installation position to continue the installation. In this way, there is no need to install a lifting ring on the ceiling to lift the air duct. The setting of the climbing frame and the pulley block on the base can make the construction personnel install the air duct more efficient.

[0026] 2. Through the setting of the driving cylinder, when the construction workers have adjusted the angle of the lifting seat but the height of the lifting seat is not enough, the driving cylinder is started to raise the upper bracket, thereby raising the base on the upper bracket, so that the construction workers can install the air duct at an angle that is convenient for installing the air duct. The setting of the driving cylinder can also enable the construction workers to rotate the lifting threaded rod and drag the air duct to the base. If the construction workers find that the height is not enough, they can start the driving cylinder to raise the base for remedy, so that the construction workers have a certain fault tolerance when raising and lowering the base, thereby improving the construction workers' use experience.

[0027] 3. Through the setting of the movable pulley, it is achieved that the movable pulley is set on one end of the lifting seat close to the auxiliary climbing frame, which can cooperate with the pulley group to make the whole bracket evenly stressed when dragging the air duct, and the cooperation of the movable pulley and the pulley group can also increase the force of dragging the air duct; because the movable pulley is set on one end of the lifting seat close to the auxiliary climbing frame, when the construction personnel drag the air duct and the air duct rises to the position of the movable pulley, the air duct presses the movable pulley so that the movable pulley presses the supporting spring to retract into the plug-in interface, so that the movable pulley will not block the air duct from moving to the lifting seat, and when the air duct is installed and the climbing frame is moved, the movable pulley will be ejected by the supporting spring, so that it can continue to work next time, thereby improving the stability of the bracket and the purpose of construction efficiency.

[0028] 4. Through the arrangement of the push plate, the top block and the supporting structure, the connecting bending spring supports the push plate before the push plate is pushed by the air duct, so that the push plate provides supporting force to the top block, and the top block supports the movable pulley on the bottom surface of the movable seat to provide supporting force to prevent it from sliding down. When the air duct moves to the side of the lifting seat close to the auxiliary climbing frame, the air duct abuts against the end of the push plate extending out of the through hole. At this time, the air duct continues to be dragged, and the air duct pushes the push plate to make the push plate rotate, and the connecting plate rotates and moves to the storage port to compress the connecting bending spring into a vertical state, so that the top block no longer supports the movable seat, and the movable pulley retracts into the plug-in interface. At this time, the air duct is already on the lifting seat, and the fulcrum of the movable pulley is no longer needed. In this way, the movable pulley can provide a fulcrum for the air duct before the air duct rises to the lifting seat, thereby reducing the force required for dragging the air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is the overall structure diagram of the embodiment; Figure 2 It is another view of the overall structure of the embodiment; Figure 3 yes Figure 1 Enlarged view of part A in the middle.

[0030] Figure numerals: 1. Auxiliary climbing frame; 10. Support climbing frame; 11. Upper bracket; 12. Lower bracket; 13. Roller; 2. Base; 20. Pulley block; 21. Towing rope; 22. Fixed seat; 23. Lifting seat; 24. Movable pulley; 25. Plug interface; 26. Movable seat; 27. Support spring; 28. Through port; 3. Lifting threaded rod; 4. Driving cylinder; 5. Support assembly; 50. Fixed plate; 51. Support rod; 6. Push plate; 60. Rotating shaft; 61. Top block; 7. Support structure; 70. Connecting plate; 71. Storage port; 72. Connecting bending spring; 8. Universal wheel. DETAILED DESCRIPTION

[0031] The present application is further described in detail below with reference to the accompanying drawings.

[0032] Example, see Figure 1 , Figure 2 A temporary internal support frame for a large-volume air duct in a subway station includes two opposing climbing frames, a base 2 installed between the two climbing frames, a pulley block 20 installed on both sides of the base 2, and a pulling rope 21 installed on the pulley block 20. The base 2 is fixedly installed at the upper end of the climbing frame, and a lifting device is connected to the bottom surface of the base 2. The base 2 includes a fixed seat 22 and a lifting seat 23. The fixed seat 22 is fixedly installed between the upper ends of the two climbing frames, the pulley block 20 is installed on the lifting seat 23, and the lifting device includes a lifting threaded rod 3 vertically threadedly connected to the fixed seat 22, one end of the lifting threaded rod 3 is fixedly connected to the bottom surface of the lifting seat 23, and the other end extends to the ground.

[0033] First, the lifting seat 23 is raised by rotating the lifting threaded rod 3, and then the position of the lifting seat 23 after the lifting is observed, and then the lifting threaded rod 3 is rotated to adjust the angle of the lifting seat 23. After the adjustment is completed, one end of the pulling rope 21 is tied to the air duct, and then the other end of the pulling rope 21 is dragged to drive the air duct to move upward through the pulley block 20, and then the air duct is dragged to the base 2. The construction personnel climb onto the base 2 through the climbing frame, release the pulling rope 21 and install the air duct. After the installation is completed, the climbing frame is lowered, and the climbing frame is moved to the next installation position to continue the installation. In this way, the installation of the air duct does not require the installation of a lifting ring on the ceiling to suspend the air duct. The setting of the pulley block 20 on the climbing frame and the base 2 makes it more efficient for the construction personnel to install the air duct, and the construction can be carried out without installing the lifting ring in advance. The installation of the air duct can be adjusted by moving the position of the climbing frame, so that the construction personnel can install the air duct more conveniently. The bottom surfaces of the auxiliary climbing frame 1 and the supporting climbing frame 10 are both provided with universal wheels 8, and the universal wheels 8 facilitate the movement of the entire bracket.

[0034] Although the setting of the lifting threaded rod 3 can facilitate the construction workers to adjust the height and angle of the installed air duct, if the height of the lifting seat 23 is not enough after adjusting the angle of the lifting seat 23, rotating the lifting threaded rod 3 will change the angle of the lifting seat 23, resulting in difficulty in installing the air duct. In order to solve this technical problem, in this embodiment, the climbing frame is configured to include an upper bracket 11 and a lower bracket 12, the base 2 is installed between the upper brackets 11 of the two climbing frames, and a driving cylinder 4 is installed between the upper bracket 11 and the lower bracket 12, and the driving cylinder 4 is fixedly connected to the lower bracket 12, and the output end of the driving cylinder 4 is upward and fixedly connected Connected to the upper bracket 11, when the construction workers have adjusted the angle of the lifting seat 23, but the height of the lifting seat 23 is not enough, the driving cylinder 4 is started to raise the upper bracket 11, thereby raising the base 2 located on the upper bracket 11, so that the construction workers can install the air duct at an angle that is convenient for installing the air duct. The setting of the driving cylinder 4 can also enable the construction workers to rotate the lifting threaded rod 3 and drag the air duct onto the base 2. If the construction workers find that the height is not enough, they can start the driving cylinder 4 to raise the base 2 for remedy, so that the construction workers have a certain fault tolerance when lifting the base 2, thereby improving the construction workers' usage experience.

[0035] Although the setting of the climbing frame can make the construction workers more efficient in installing the air duct, when the construction workers drag the air duct to the base 2 by pulling the towing rope 21, the vertical side of the one of the two climbing frames closer to the air duct will contact the air duct, and the air duct rubs the climbing frame to move to the base 2, resulting in wear on the surface of the air duct and the surface of the climbing frame. In order to solve this technical problem, in this embodiment, the two climbing frames are set as an auxiliary climbing frame 1 and a supporting climbing frame 10. The auxiliary climbing frame 1 is vertically installed with multiple groups of rollers 13 on a side away from the supporting climbing frame 10, and the supporting climbing frame 10 is installed with a supporting assembly 5 on a side away from the auxiliary climbing frame 1. The supporting assembly 5 includes two opposite fixing plates 50 and a supporting rod 51 installed between the two fixing plates 50. The two fixing plates 50 are fixedly connected to the supporting climbing frame 10. On the supporting climbing frame 10, one end of the supporting rod 51 is rotatably connected to the two fixed plates 50, and the other end is against the ground. The construction workers drag from the supporting climbing frame 10, and the pulling rope 21 makes the air duct contact the auxiliary climbing frame 1, and the auxiliary climbing frame 1 is provided with a roller 13. When the air duct is dragged up, the side close to the auxiliary climbing frame 1 will contact the roller 13. After the air duct contacts the roller 13, the roller 13 rotates to reduce the friction on the air duct, making it easier for the construction workers to drag the air duct and reducing the wear of the air duct and the climbing frame; when dragging the air duct, the supporting climbing frame 10 is mainly under pressure. Therefore, before dragging the air duct, the supporting rod 51 is first rotated to make it abut against the ground, and then the air duct is dragged, so that the supporting rod 51 provides support to the supporting climbing frame 10 to prevent the supporting climbing frame 10 from collapsing.

[0036] A pulley block 20 is provided at one end of the lifting seat 23. When the air duct is dragged, the entire bracket is prone to uneven force, which makes the climbing frame easy to be damaged. In addition, the force of the pulley block 20 provided at one end to drag the air duct is insufficient, which makes it difficult to drag the air duct. However, if the pulley blocks 20 are provided at both ends of the lifting seat 23, the pulley block 20 at one end will block the air duct when the air duct is dragged, causing the air duct to be unable to move to the base 2, but stuck on the climbing frame. Figure 3In order to solve this technical problem, in this embodiment, the pulley block 20 is arranged on the upper surface of the lifting seat 23 near the end of the supporting climbing frame 10, and the upper surface of the lifting seat 23 near the end of the auxiliary climbing frame 1 is provided with a movable pulley 24. The upper surface of the lifting seat 23 near the end of the auxiliary climbing frame 1 is provided with an insertion interface 25, and the bottom surface of the movable pulley 24 is fixedly connected with a movable seat 26, and the movable seat 26 is plugged into the lifting seat 23 through the insertion interface 25. A support spring 27 is provided between the movable seat 26 and the bottom surface of the insertion interface 25, and one end of the support spring 27 is fixedly connected to the bottom surface of the movable seat 26, and the other end is fixedly connected to the bottom surface of the insertion interface 25. The movable pulley 24 is arranged on the lifting seat 23 near the auxiliary climbing frame 1 On one end, it can cooperate with the pulley block 20 to make the entire bracket evenly stressed when dragging the air duct, and the cooperation between the movable pulley 24 and the pulley block 20 can also increase the force for dragging the air duct; because the movable pulley 24 is arranged on one end of the lifting seat 23 close to the auxiliary climbing frame 1, when the construction personnel drag the air duct and the air duct rises to the position of the movable pulley 24, the air duct presses the movable pulley 24 so that the movable pulley 24 presses the supporting spring 27 to retract into the plug-in interface 25, so that the movable pulley 24 will not block the air duct from moving to the lifting seat 23, and when the air duct is installed and the climbing frame is moved, the movable pulley 24 will be ejected by the supporting spring 27, so that it can continue to work next time, thereby improving the stability of the bracket and the construction efficiency.

[0037] Although the provision of the movable pulley 24 can save the force of dragging the air duct while improving the stability of the bracket, when dragging the air duct, the force of the towing rope 21 on the movable pulley 24 is downward and in the dragging direction. This downward force may cause the movable pulley 24 to retract into the plug-in port 25 before the air duct rises onto the lifting seat 23, resulting in only the pulley block 20 providing a fulcrum, resulting in the climbing frame 10 being supported by a large force and being easily damaged. In order to solve this technical problem, in this embodiment, a through hole 28 that passes through the lifting seat 23 is opened on the side of the plug-in port 25 away from the pulley block 20, and a push plate 6 is provided in the through hole 28. One end of the push plate 6 extends into the through-port 28, and the other end extends out of the through-port 28. Rotating shafts 60 extend from both sides of the push plate 6 and are rotatably connected to the lifting seat 23. One end of the push plate 6 extending into the through-port 28 extends upward with a top block 61 abutting against the movable seat 26. A supporting structure 7 for supporting the push plate 6 is provided on one side of the push plate 6. The supporting structure 7 includes a connecting plate 70 fixedly connected to one side of the push plate 6, a receiving port 71 opened on one side of the through-port 28 and located above the rotating shaft 60, and a connecting bending spring 72 arranged between the receiving port 71 and the connecting plate 70. One end of the connecting bending spring 72 is fixedly connected to the connecting plate 70, and the other end is fixedly connected to the inner wall of the receiving port 71.

[0038] The connecting spring 72 supports the push plate 6 before the push plate 6 is pushed by the air duct, so that the push plate 6 provides a supporting force to the top block 61, and the top block 61 supports the movable pulley 24 on the bottom surface of the movable seat 26 to provide a supporting force to prevent it from sliding down. When the air duct moves to the side of the lifting seat 23 close to the auxiliary climbing frame 1, the air duct abuts against the end of the push plate 6 extending out of the through hole 28. At this time, the air duct continues to be dragged, and the air duct pushes the push plate 6 to rotate the push plate 6. The connecting plate 70 rotates and moves to the storage port 71 to compress the connecting spring 72 into a vertical state, so that the top block 61 no longer supports the movable seat 26, and the movable pulley 24 retracts into the plug interface 25, at this time the air duct is already located on the lifting seat 23, and the fulcrum of the movable pulley 24 is no longer needed. In this way, the movable pulley 24 can provide a fulcrum for the air duct before the air duct rises onto the lifting seat 23, thereby reducing the force required for dragging the air duct. When the air duct is located on the lifting seat 23 and the movable pulley 24 is retracted in the plug-in port 25, the push plate 6 is restricted from rotating. When the air duct is installed and the entire bracket is moved, the movable pulley 24 is ejected, and the connecting bending spring 72 pushes the connecting plate 70 to rotate the push plate 6, so that the top block 61 abuts against the movable seat 26 again to provide support for the movable pulley 24.

[0039] Specific implementation process: push the climbing frame to move to the bottom of the air duct installation position, rotate the lifting threaded rod 3 to adjust the position and angle of the lifting seat 23, after the adjustment is completed, install the pulling rope 21 on the air duct, drag the air duct by the pulling rope 21 on the side of the supporting climbing frame 10, and move the air duct to the lifting seat 23, and observe whether the height of the air duct is convenient for installation. If it is not convenient for installation, start the driving cylinder 4 to adjust the height of the lifting seat 23. If it is convenient for installation, release the pulling rope 21 installed on the air duct and install the air duct. After the installation is completed, push the climbing frame to move to the next installation point.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. The internal temporary support frame of the large volume air duct of the subway station is characterized by: The invention comprises two opposing climbing frames, a base (2) installed between the two climbing frames, a pulley block (20) installed on both sides of the base (2), and a pulling rope (21) installed on the pulley block (20); the base (2) is fixedly installed on the upper end of the climbing frame, and the bottom surface of the base (2) is connected to a lifting device.

2. According to claim 1, the internal temporary support frame of the large-volume air duct of the subway station is characterized in that: The base (2) comprises a fixed seat (22) and a lifting seat (23), wherein the fixed seat (22) is fixedly mounted between the upper ends of the two climbing frames, the pulley block (20) is mounted on the lifting seat (23), and the lifting device comprises a lifting threaded rod (3) vertically threadedly connected to the fixed seat (22), wherein one end of the lifting threaded rod (3) is fixedly connected to the bottom surface of the lifting seat (23), and the other end extends toward the ground.

3. The internal temporary support frame for the large-volume air duct of a subway station according to claim 1 is characterized in that: The climbing frame comprises an upper support (11) and a lower support (12), the base (2) being installed between the upper supports (11) of the two climbing frames, a driving cylinder (4) being installed between the upper support (11) and the lower support (12), the driving cylinder (4) being fixedly connected to the lower support (12), and the output end of the driving cylinder (4) facing upward and being fixedly connected to the upper support (11).

4. The internal temporary support frame for the large-volume air duct of a subway station according to claim 1 is characterized in that: The two climbing frames are divided into an auxiliary climbing frame (1) and a supporting climbing frame (10); a side of the auxiliary climbing frame (1) away from the supporting climbing frame (10) is vertically mounted with a plurality of rollers (13); a side of the supporting climbing frame (10) away from the auxiliary climbing frame (1) is mounted with a supporting assembly (5).

5. The internal temporary support frame for the large-volume air duct of a subway station according to claim 4 is characterized in that: The support assembly (5) comprises two opposite fixing plates (50) and a support rod (51) installed between the two fixing plates (50); the two fixing plates (50) are fixedly connected to the supporting climbing frame (10); one end of the support rod (51) is rotatably connected to the two fixing plates (50) and the other end abuts against the ground.

6. The internal temporary support frame for the large-volume air duct of a subway station according to claim 1 is characterized in that: The pulley block (20) is arranged on the upper surface of the lifting seat (23) close to the supporting climbing frame (10); the upper surface of the lifting seat (23) close to the auxiliary climbing frame (1) is provided with a movable pulley (24); the upper surface of the lifting seat (23) close to the auxiliary climbing frame (1) is provided with an insertion interface (25); the bottom surface of the movable pulley (24) is fixedly connected with a movable seat (26); the movable seat (26) is plugged into the lifting seat (23) through the insertion interface (25); a support spring (27) is provided between the movable seat (26) and the bottom surface of the insertion interface (25); one end of the support spring (27) is fixedly connected to the bottom surface of the movable seat (26); and the other end is fixedly connected to the bottom surface of the insertion interface (25).

7. The internal temporary support frame for the large-volume air duct of a subway station according to claim 6, characterized in that: A through hole (28) penetrating the lifting seat (23) is provided on the side of the plug interface (25) away from the pulley block (20), and a push plate (6) is provided in the through hole (28). One end of the push plate (6) extends into the through hole (28), and the other end extends out of the through hole (28). Rotating shafts (60) extend from both sides of the push plate (6) and are rotatably connected to the lifting seat (23). One end of the push plate (6) extending into the through hole (28) extends upward with a top block (61) abutting against the movable seat (26), and a supporting structure (7) for supporting the push plate (6) is provided on one side of the push plate (6).

8. The internal temporary support frame for the large-volume air duct of a subway station according to claim 7, characterized in that: The support structure (7) comprises a connecting plate (70) fixedly connected to one side of the push plate (6), a receiving opening (71) opened on one side of the through opening (28) and located above the rotating shaft (60), and a connecting bending spring (72) arranged between the receiving opening (71) and the connecting plate (70), wherein one end of the connecting bending spring (72) is fixedly connected to the connecting plate (70) and the other end is fixedly connected to the inner wall of the receiving opening (71).

9. The internal temporary support frame for the large-volume air duct of a subway station according to claim 4, characterized in that: The bottom surfaces of the auxiliary climbing frame (1) and the supporting climbing frame (10) are both provided with universal wheels (8).

10. The method for installing air ducts on the internal temporary support frame of the large-volume air ducts of a subway station according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, push the climbing frame to move below the air duct installation position, and rotate the lifting threaded rod (3) to adjust the position and angle of the lifting seat (23); S2. After the adjustment is completed, the pulling rope (21) is installed on the air duct, and the air duct is dragged by the pulling rope (21) on one side of the supporting climbing frame (10) to move the air duct to the lifting seat (23); S3. Observe whether the height of the air duct is convenient for installation. If it is not convenient for installation, start the driving cylinder (4) to adjust the height of the lifting seat (23). If it is convenient for installation, release the pulling rope (21) installed on the air duct. S4. Install the air duct; S5. After installation is completed, push the climbing frame to move to the next installation point.

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