Full-prefabricated assembly type station rail top air flue mounting device

Abstract

The utility model discloses a full-prefabricated assembly type station rail top air duct installation device, which relates to the technical field of rail top air duct installation auxiliary equipment, and comprises a trolley for transporting a rail top air duct, a fixing frame, a middle plate, an upper channel and a lower channel, and an adjusting assembly for adjusting the position of the rail top air duct is arranged on the trolley. The trolley transports the rail top air duct, stable movement of the rail top air duct is achieved through the clamping assembly on the trolley, the rail top air duct is prevented from overturning during movement, the adjusting assembly on the trolley works to adjust the position of the rail top air duct to be connected with the middle plate, and therefore accurate installation work of the rail top air duct is achieved, and the rail top air duct is convenient and fast to install.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for track top ventilation duct installation, and in particular to a fully prefabricated assembly-type track top ventilation duct installation device for railway stations. Background Technology

[0002] In the production process of fully prefabricated subway stations, the middle slab and the rail-top ventilation duct are prefabricated separately as individual components. After the components arrive at the construction site, they need to be assembled. However, since the rail-top ventilation duct component needs to be installed on the bottom surface of the middle slab, it is necessary to consider how to transport it to the assembly point while installing the rail-top ventilation duct. The traditional installation method is to assemble it manually with the help of a hand-operated hoist. However, this approach has the following risks and shortcomings: after the rail-top ventilation duct is installed to the assembly position, manual hoisting and assembly are used, resulting in high construction risks; a single installation requires the cooperation of multiple people and other tools and cranes, resulting in high construction costs; the assembly accuracy of the rail-top ventilation duct is difficult to control when using a crane, and the level of mechanization and automation is low, making the construction difficult.

[0003] Therefore, the installation of traditional rail-top ventilation ducts not only directly affects construction safety, as the heavy weight of the ducts makes them prone to falling and causing injuries or fatalities during construction, but also directly impacts construction costs. The large amount of manpower required not only increases labor costs but also necessitates additional tools and equipment, affecting equipment costs. Furthermore, the traditional installation method suffers from poor operability and low level of automation.

[0004] For example, announcement number CN114439532B, published on April 11, 2023, discloses a method for installing a rail-top ventilation duct. The method involves constructing a subway center slab, embedding reinforcing bars for the rail-top ventilation duct extending downwards at the installation location, prefabricating the rail-top ventilation duct, and setting lifting holes corresponding to the reinforcing bars on the upper edge of the duct. Grouting sleeves are then embedded in these lifting holes. For preparation of the rail-top ventilation duct hoisting, a winch lowers a hoisting rope, passing it through a through-hole in the center slab and then through a lifting hole on the bottom surface of the duct. The duct is then hoisted by rewinding the rope, allowing the reinforcing bars to insert into the grouting sleeve, thus bringing the duct to the designated installation position, where grouting is performed on the sleeve. However, the aforementioned method uses a winch for hoisting the rail-top ventilation duct, which makes installation inconvenient and impractical. Utility Model Content

[0005] The purpose of this invention is to provide a more practical, fully prefabricated, assembled track-top ventilation duct installation device. This invention achieves stable clamping of the track-top ventilation duct through the cooperation of clamping and adjusting components on the trolley, thus enabling convenient installation and increasing practicality.

[0006] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is: a fully prefabricated assembled station rail top ventilation duct installation device, including a trolley for transporting rail top ventilation ducts, a fixing frame, a middle plate and upper and lower channels, wherein the trolley is provided with a clamping component for clamping the rail top ventilation ducts, and the trolley is provided with an adjustment component for adjusting the position of the rail top ventilation ducts.

[0007] The clamping assembly includes a first vertical stop bar and a second vertical stop bar disposed at both ends of the trolley. The first vertical stop bar is provided with a first horizontal stop bar and a first limiting cylinder is provided on the first horizontal stop bar. The second vertical stop bar is provided with a second horizontal stop bar and a second limiting cylinder is provided on the second horizontal stop bar.

[0008] The adjustment assembly includes a vertical adjustment cylinder disposed at the lower end of the trolley, and a horizontal adjustment cylinder disposed on the vertical adjustment cylinder. The horizontal adjustment cylinder and the vertical adjustment cylinder are arranged perpendicularly to each other. The pistons of the horizontal adjustment cylinders disposed opposite each other are connected by a horizontal support beam. The end of the horizontal support beam is provided with a guide seat, and the guide seat is provided with a guide groove for guiding the movement of the vertical adjustment cylinder.

[0009] The transverse beam includes two opposing transverse plates, which are welded to a guide seat. A connecting seat is provided between the two transverse plates, and a rotating shaft is provided on the connecting seat. A sleeve that is hinged to the rotating shaft is provided on the piston of the transverse adjusting cylinder. A fixed seat is provided on the cylinder body of the vertical adjusting cylinder, and a transverse shaft that is hinged to the fixed seat is provided on the cylinder body of the transverse adjusting cylinder.

[0010] The guide seat is provided with two opposing pressure plates, the guide groove is provided between the two pressure plates, and the cylinder body of the vertical adjustment cylinder is sleeved in the guide groove.

[0011] The trolley is provided with a horizontal beam at its lower end. The horizontal beam is connected to the piston of the vertical adjustment cylinder. A support column is provided on the horizontal beam, and rollers are provided on the support column.

[0012] The trolley is equipped with a support beam that supports the top air duct of the rail, and the trolley is also equipped with a placement slot for receiving the end of the top air duct of the rail.

[0013] The middle plate is connected to the fixed frame, and both ends of the middle plate are connected to the rail top air duct by bolts. The upper and lower channels are connected to both ends of the middle plate.

[0014] The trolley is also equipped with a hydraulic control system that controls the first limit cylinder, the second limit cylinder, the horizontal adjustment cylinder, and the vertical adjustment cylinder.

[0015] A method for using the fully prefabricated prefabricated railway station track top ventilation duct installation device as described above, the specific steps of which are as follows:

[0016] Step 1: Install the two fixed frames at the designated positions in the station, and hoist the middle plate onto the two fixed frames;

[0017] Step 2: After the middle plate is lowered into place, the assembled rail top ventilation duct is moved to the trolley, the rail top ventilation duct is hoisted onto the trolley and positioned, the hydraulic control system is activated, and the first limit cylinder and the second limit cylinder are used to fix the rail top ventilation duct against overturning.

[0018] Step 3: After the top air duct is fixed and stable, start the vertical adjustment cylinder to lower the support column and rollers to contact the ground, and move the trolley horizontally with the help of manual traction.

[0019] Step 4: When the two trolleys move to the assembly point at the bottom of the middle plate, start the vertical adjustment cylinder. The guide seat will contact the ground. At this time, the support column and rollers will be suspended in the air. Then, manually align them and use the horizontal and vertical adjustment cylinders to make fine adjustments to the upper part of the trolley and adjust the position of the rail top air duct.

[0020] Step 5: Workers enter the top surface of the middle plate through the upper and lower passages on both sides of the middle plate to bolt the rail top air duct to the middle plate.

[0021] Step 6: Repeat the above operation process to assemble the next set of middle plates and rail top air ducts.

[0022] The beneficial effects of this utility model are:

[0023] The trolley transports the rail-top air duct. The clamping components on the trolley ensure stable movement of the rail-top air duct, preventing it from tipping over during movement. The adjustment components on the trolley adjust the position of the rail-top air duct to connect with the middle plate, thereby achieving precise installation of the rail-top air duct. The installation of the rail-top air duct is convenient and quick.

[0024] Under the clamping action of the first and second limit cylinders, the rail top air duct is stably clamped on the trolley. The attitude of the trolley and the rail top air duct is adjusted by the action of the horizontal and vertical adjustment cylinders set on the guide plate, so as to realize the lifting operation after the trolley is in place and the horizontal fine adjustment of the upper trolley. After the rail top air duct is bolted to the middle plate, it can automatically exit the assembly point. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of the fully prefabricated assembled station rail top ventilation duct installation device of this utility model.

[0026] Figure 2 for Figure 1 Another perspective structural diagram.

[0027] Figure 3 for Figure 1 A partial structural diagram.

[0028] Figure 4 This is a schematic diagram of the structure when the middle plate is installed on the fixed frame.

[0029] Figure 5 This is a schematic diagram of the structure of the air duct on the top of the moving track of the trolley.

[0030] Figure 6 This is a schematic diagram of the structure when the air duct on the top of the moving rail of the trolley is in place.

[0031] Figure 7 This is a schematic diagram of the structure when the trolley is being evacuated.

[0032] In the attached diagram: 1-Trolley, 2-Support beam, 3-First vertical stop bar, 4-First horizontal stop bar, 5-First limit cylinder, 6-Second vertical stop bar, 7-Second horizontal stop bar, 8-Second limit cylinder, 9-Placement groove, 10-Horizontal beam, 11-Support column, 12-Roller, 13-Guide seat, 14-Horizontal tie beam, 1401-Horizontal plate, 15-Vertical adjustment cylinder, 16-Horizontal adjustment cylinder, 17-Pressure plate, 18-Guide groove, 19-Sleeve, 20-Horizontal shaft, 21-Fixed seat, 22-Rail top air duct, 23-Fixed frame, 24-Middle plate, 25-Upper and lower passages, 26-Connecting seat, 27-Rotating shaft, 28-Hydraulic system. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0034] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0035] like Figure 1-7 As shown, the fully prefabricated prefabricated station rail top ventilation duct installation device includes a trolley 1 for transporting the rail top ventilation duct 22, a fixing frame 23, a middle plate 24, and upper and lower passages 25. The trolley 1 is equipped with a clamping component for holding the rail top ventilation duct 22. The clamping component works to ensure the stable installation of the rail top ventilation duct 22 on the trolley 1 and prevent the rail top ventilation duct 22 from tipping over when moving. The trolley 1 is also equipped with an adjusting component for adjusting the position of the rail top ventilation duct 22, thereby ensuring that the rail top ventilation duct 22 is in the designated position when connected to the middle plate, thus ensuring the accurate installation of the rail top ventilation duct 22.

[0036] In use, the two fixed frames 23 are moved to the designated position in the station, the middle plate 24 is hoisted and moved onto the fixed frames 23, the upper and lower passages 25 are installed onto the middle plate 24, the rail top ventilation duct 22 is placed on the trolley 1, and the rail top ventilation duct 22 is moved stably by the clamping components on the trolley 1 to prevent the rail top ventilation duct 22 from tipping over during movement. The adjustment components on the trolley 1 are used to adjust the position of the rail top ventilation duct 22 to connect with the middle plate 24, thereby achieving the precise installation of the rail top ventilation duct 22. The installation of the rail top ventilation duct 22 is convenient and quick.

[0037] Reference Figure 1 The clamping assembly includes a first vertical stop bar 3 and a second vertical stop bar 6 disposed at both ends of the trolley 1. The first vertical stop bar 3 is provided with a first horizontal stop bar 4 and a first limiting cylinder 5. The second vertical stop bar 6 is provided with a second horizontal stop bar 7 and a second limiting cylinder 8. When the rail top air duct 22 is moved onto the trolley 1 by hoisting, the rail top air duct 22 is positioned between the first vertical stop bar 3 and the second vertical stop bar 6. At this time, the first limiting cylinder 5 on the first horizontal stop bar 4 and the second limiting cylinder 8 on the second horizontal stop bar 7 are activated. Thus, the pistons of the first limiting cylinder 5 and the second limiting cylinder 8 clamp the rail top air duct 22, thereby fixing the rail top air duct 22 on the trolley 1 and preventing the rail top air duct 22 from overturning during movement, thus ensuring the normal installation of the rail top air duct 22.

[0038] In this embodiment, the trolley 1 is assembled by welding steel sections. Its size can be adjusted according to the weight of the rail top air duct 22 and the middle plate 24 to ensure that the support has sufficient load-bearing capacity and rigidity. Specifically, the entire trolley 1 is rectangular. Five first vertical baffles 3 and five second vertical baffles 6 are welded at equal intervals at both ends of the trolley 1. A first horizontal baffle 4 is welded on the five first vertical baffles 2, and a second horizontal baffle 7 is welded on the five second vertical baffles 6. A first limiting cylinder 5 is bolted to the first horizontal baffle 4, and a second limiting cylinder 8 is bolted to the second horizontal baffle 7. The pistons of the first limiting cylinder 5 and the second limiting cylinder 8 are provided with elastic blocks to ensure elastic contact between the pistons of the first limiting cylinder 5 and the second limiting cylinder 8 and the rail top air duct 22, thereby preventing damage to the rail top air duct 22 under the clamping of the cylinders.

[0039] Reference Figure 1 and 2The adjustment assembly includes a vertical adjustment cylinder 15 located at the lower end of the trolley 1, and a horizontal adjustment cylinder 16 mounted on the vertical adjustment cylinder 15. The horizontal adjustment cylinder 16 and the vertical adjustment cylinder 15 are arranged perpendicularly to each other. The pistons of the horizontal adjustment cylinders 16 are connected by a horizontal support beam 14. The end of the horizontal support beam 14 is provided with a guide seat 13, and the guide seat 13 is provided with a guide groove 18 for guiding the movement of the vertical adjustment cylinder 15. In use, the vertical adjustment cylinder 15 is activated, thereby causing the piston of the vertical adjustment cylinder 15 to move the trolley 1 up and down, thereby adjusting the vertical position of the rail top air duct 22 clamped on the trolley 1. The horizontal adjustment cylinders 16 at both ends of the horizontal support beam 14 are activated, thereby allowing the vertical adjustment cylinder 15 to move in the guide groove 18 on the guide seat 13, thereby enabling the trolley 1 and the rail top air duct 22 connected to the vertical adjustment cylinder 15 to move laterally.

[0040] Specifically, four guide seats 13 are provided at the four corners of the trolley 1, and each guide seat 13 is equipped with a vertical adjustment cylinder 15. The four vertical adjustment cylinders 15 work to adjust the vertical position of the trolley 1. Two guide seats 13 in the length direction of the trolley 1 are welded together by a crossbeam 14. Each guide seat 13 is provided with a guide groove 18 to limit the movement of the vertical adjustment cylinder 15. The horizontal adjustment cylinders 16 at the ends of the two crossbeams 14 at the lower end of the trolley 1 work to drive the piston to move the vertical adjustment cylinder 15 in the guide groove 18, thereby realizing the horizontal position adjustment of the trolley 1 on the guide seat 13. The model and stroke of the vertical adjustment cylinder 15 and the horizontal adjustment cylinder 16 should be determined according to the structural weight of the trolley 1 and the displacement limits for vertical and horizontal adjustment.

[0041] The transverse beam 14 includes two opposing transverse plates 1401, which are welded to the guide seat 13. A connecting seat 26 is provided between the two transverse plates 1401, and a rotating shaft 27 is provided on the connecting seat 26. A sleeve 19 hinged to the rotating shaft 27 is provided on the piston of the transverse adjusting cylinder 16. A fixed seat 21 is provided on the cylinder body of the vertical adjusting cylinder 15. A transverse shaft 20 hinged to the fixed seat 21 is provided on the cylinder body of the transverse adjusting cylinder 16. When the transverse adjusting cylinder 16 operates, the piston drives the sleeve 19 to apply force to the rotating shaft 27. This allows the vertical adjusting cylinder 15, which is connected to the cylinder body of the horizontal adjusting cylinder 16, to move in the guide groove 18 of the guide seat 13, thereby achieving position adjustment of the vertical adjusting cylinder 15. The hinged connection between the sleeve 19 and the rotating shaft 27, and the hinged connection between the fixed seat 21 and the horizontal shaft 20, ensures the convenient movement of the vertical adjusting cylinder 15 on the guide seat 13 and prevents the horizontal adjusting cylinder 16 from getting stuck, thus ensuring the stable installation of the vertical adjusting cylinder 15 and the horizontal adjusting cylinder 16 on the guide seat 13.

[0042] The guide seat 13 is provided with two opposing pressure plates 17, and the guide groove 18 is provided between the two pressure plates 17. The cylinder body of the vertical adjustment cylinder 15 is sleeved in the guide groove 18. The lower end of the cylinder body of the vertical adjustment cylinder 15 is provided with an outwardly protruding mounting plate. The mounting plate is provided in the guide groove 18, thereby ensuring that under the limiting action of the pressure plates 17, the vertical adjustment cylinder 15 can only move laterally on the guide seat 13. Specifically, the pressure plates 17 are welded in the guide seat 13, and the cross-section of the guide groove 18 provided in the pressure plates 17 is inverted T-shaped.

[0043] The lower end of the trolley 1 is provided with a transverse beam 10, which is connected to the piston of the vertical adjustment cylinder 15. The transverse beam 10 is provided with a support column 11, and the support column 11 is provided with a roller 12. The vertical adjustment cylinder 15 adjusts the relative position of the transverse beam 10 and the guide seat 13. When the guide seat 13 is suspended, the support column 11 and the roller 12 are in contact with the ground, which facilitates the movement of the trolley 1. Specifically, the support column 11 is hinged to the roller 12, and the support column 11 is welded to the lower end of the trolley 1. The support column 11 is set on both sides of the width direction of the trolley 1, and three support columns 11 are provided on each of the two sides of the trolley 1.

[0044] The trolley 1 is equipped with support beams 2 that support the top air duct 22. The support beams 2 support the top air duct 22. Specifically, five support beams 2 are welded at equal intervals on the trolley 1. The support beams 2 are also equipped with lining plates. The lining plates are in direct contact with the top air duct 22. The trolley 1 is equipped with a placement groove 9 for storing the end of the top air duct 22. The placement groove 9 is designed to facilitate the storage of the extended part of the end of the top air duct 22, thereby ensuring that the top air duct 22 can maintain a stable posture during installation under the support of the support beams 2 on the trolley 1.

[0045] The middle plate 24 is connected to the fixed frame 23. The fixed frame 23 has the load-bearing capacity to support the middle plate 24 and the rail top ventilation duct 22, thus facilitating the installation of the middle plate 24 and the rail top ventilation duct 22. The two ends of the middle plate 24 are connected to the rail top ventilation duct 22 by bolts, thus facilitating the convenient installation of the middle plate 4 and the rail 22 inside the station. The upper and lower passage 25 is connected to both ends of the middle plate 24, thus facilitating the access of auxiliary personnel to and from the middle plate. Specifically, the upper and lower passage 25 is equipped with guardrails and is a steel movable ladder for the upper and lower passage 25. Its model can accommodate two workers to go up and down at the same time. The height of the upper and lower passage 25 is flush with the top surface of the middle plate.

[0046] The trolley 1 is also equipped with a hydraulic control system 28 that controls the first limit cylinder 5, the second limit cylinder 8, the lateral adjustment cylinder 16, and the vertical adjustment cylinder 15. The hydraulic control system 28 works to control the working state of the lateral adjustment cylinder 16 and the vertical adjustment cylinder 15, thereby facilitating the attitude adjustment of the rail-top air duct 22 on the trolley 1. Specifically, the hydraulic control system 28 is a PLC control cabinet, which is equipped with buttons. The buttons in the control cabinet control the operation of the first limit cylinder 5, the second limit cylinder 8, the lateral adjustment cylinder 16, and the vertical adjustment cylinder 15, thereby realizing the lifting, forward movement, parking, and retraction of the rail-top air duct 22 clamped on the installation device.

[0047] A method for using the fully prefabricated prefabricated railway station track top ventilation duct installation device as described above, with the specific steps as follows:

[0048] Step 1: Install the two fixing frames 23 to the designated positions in the station, and hoist the middle plate 24 onto the two fixing frames 23;

[0049] Step 2: After the middle plate 24 is lowered into place, the assembled rail top ventilation duct 22 is moved to the trolley 1, the rail top ventilation duct 22 is hoisted into place on the trolley 1, the hydraulic control system 28 is started, and the first limit cylinder 5 and the second limit cylinder 8 are used to fix the rail top ventilation duct 22 against overturning.

[0050] Step 3: After the top air duct 22 is fixed and stable, start the vertical adjustment cylinder 15 to lower the support column 11 and roller 12 to contact the ground, and move the trolley horizontally with the help of manual traction.

[0051] Step 4: When the two trolleys 1 move to the assembly point under the middle plate 24, start the vertical adjustment cylinder 15, and the guide seat 13 contacts the ground. At this time, the support column 11 and roller 12 are suspended in the air. Then, perform manual alignment and use the horizontal adjustment cylinder 16 and the vertical adjustment cylinder 15 to make fine adjustments to the upper part of the trolley 1 and thus adjust the position of the rail top air duct 22.

[0052] Step 5: The operator enters the top surface of the middle plate 24 through the upper and lower passages 25 on both sides of the middle plate 24 to bolt the rail top air duct 22 to the middle plate 24.

[0053] Step 6: Repeat the above operation process to assemble the next set of middle plates 24 and rail top air ducts 22.

[0054] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fully prefabricated prefabricated railway station rail top ventilation duct installation device, comprising a trolley (1) for transporting the rail top ventilation duct (22), a fixing frame (23), a middle plate (24), and upper and lower passages (25), characterized in that, The trolley (1) is equipped with a clamping assembly for clamping the top air duct (22) of the rail, and the trolley (1) is equipped with an adjustment assembly for adjusting the position of the top air duct (22).

2. The fully prefabricated assembled station rail-top ventilation duct installation device according to claim 1, characterized in that, The clamping assembly includes a first vertical stop bar (3) and a second vertical stop bar (6) disposed at both ends of the trolley (1). The first vertical stop bar (3) is provided with a first horizontal stop bar (4), and the first horizontal stop bar (4) is provided with a first limiting cylinder (5). The second vertical stop bar (6) is provided with a second horizontal stop bar (7), and the second horizontal stop bar (7) is provided with a second limiting cylinder (8).

3. The fully prefabricated assembled station rail-top ventilation duct installation device according to claim 2, characterized in that, The adjustment assembly includes a vertical adjustment cylinder (15) disposed at the lower end of the trolley (1), and a horizontal adjustment cylinder (16) disposed on the vertical adjustment cylinder (15). The horizontal adjustment cylinder (16) and the vertical adjustment cylinder (15) are arranged perpendicularly to each other. The pistons of the horizontal adjustment cylinder (16) disposed opposite to each other are connected by a horizontal support beam (14). The end of the horizontal support beam (14) is provided with a guide seat (13), and the guide seat (13) is provided with a guide groove (18) for guiding the movement of the vertical adjustment cylinder (15).

4. The fully prefabricated assembled station rail-top ventilation duct installation device according to claim 3, characterized in that, The transverse beam (14) includes two oppositely arranged transverse plates (1401), which are welded to the guide seat (13). A connecting seat (26) is provided between the two transverse plates (1401). A rotating shaft (27) is provided on the connecting seat (26). A sleeve (19) hinged to the rotating shaft (27) is provided on the piston of the transverse adjusting cylinder (16). A fixed seat (21) is provided on the cylinder body of the vertical adjusting cylinder (15). A transverse shaft (20) hinged to the fixed seat (21) is provided on the cylinder body of the transverse adjusting cylinder (16).

5. The fully prefabricated assembled station rail-top ventilation duct installation device according to claim 4, characterized in that, The guide seat (13) is provided with two opposing pressure plates (17), the guide groove (18) is provided between the two pressure plates (17), and the cylinder body of the vertical adjustment cylinder (15) is sleeved in the guide groove (18).

6. The fully prefabricated assembled railway track top ventilation duct installation device according to claim 3, characterized in that, The trolley (1) has a horizontal beam (10) at its lower end. The horizontal beam (10) is connected to the piston of the vertical adjustment cylinder (15). The horizontal beam (10) has a support column (11) and a roller (12) on the support column (11).

7. The fully prefabricated assembled station rail-top ventilation duct installation device according to claim 2, characterized in that, The trolley (1) is provided with a support beam (2) for supporting the top air duct (22) on the rail, and the trolley (1) is provided with a placement slot (9) for receiving the end of the top air duct (22).

8. The fully prefabricated assembled station rail-top ventilation duct installation device according to claim 2, characterized in that, The middle plate (24) is connected to the fixed frame (23), and the two ends of the middle plate (24) are connected to the rail top air duct (22) by bolts. The upper and lower channels (25) are connected to the two ends of the middle plate (24).

9. A fully prefabricated prefabricated station rail-top ventilation duct installation device according to claim 3, characterized in that, The trolley (1) is also equipped with a hydraulic control system (28) that controls the first limit cylinder (5), the second limit cylinder (8), the horizontal adjustment cylinder (16) and the vertical adjustment cylinder (15).

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