Temporary supporting trolley based on air bag in-situ tunnel reconstruction and extension

Abstract

The invention belongs to the technical field of tunnel supporting, and provides an air bag-based in-situ tunnel reconstruction and extension temporary supporting trolley which comprises a trolley body, a plurality of walking wheels and hydraulic supporting legs are arranged at the bottom edge of the trolley body, a plurality of supporting columns are arranged at the top edge of the trolley body, and lifting assemblies are arranged in the supporting columns respectively; the supporting plate assembly is arranged at the tops of the multiple lifting assemblies, an abduction assembly is arranged in the supporting plate assembly, and the top of the supporting plate assembly is used for containing multiple air bags; the ground scraping assembly comprises a front-back moving mechanism arranged in the vehicle body, a scraping plate is connected to the front-back moving mechanism through a connecting plate, the front-back moving mechanism is used for driving the scraping plate to move along the ground, an automatic lifting mechanism is arranged between the connecting plate and the vehicle body, and the automatic lifting mechanism is used for lifting the scraping plate away from the ground after scraping is completed. The supporting area of the top of a tunnel can be adjusted according to the scale of the tunnel, and meanwhile, hole slag below the trolley can be conveniently cleaned after supporting work is completed.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel support, and in particular relates to a temporary support trolley based on airbag in-situ tunnel reconstruction and expansion. Background Art

[0002] In traditional tunnel reconstruction and expansion, in order to ensure construction safety, the original tunnel must first be backfilled with slag to the waist before construction. The backfilled slag cannot be backfilled to the top of the tunnel, and effective support cannot be provided, resulting in poor safety.

[0003] Although the existing support trolley can use air bags to support the top of the tunnel, the supporting area of ​​the tunnel top is small and the supporting area cannot be adjusted according to the scale of different tunnels. At the same time, since the tunnel needs to be backfilled with slag, the support trolley is inevitably buried in the backfilled slag. When the trolley is driven away, the slag at the bottom of the trolley is inconvenient to clean, which will hinder the movement of the trolley. Summary of the invention

[0004] The purpose of the present invention is to provide a temporary support trolley for in-situ tunnel reconstruction and expansion based on air bags to solve the above-mentioned problems, so as to adjust the support area of ​​the tunnel top according to the scale of the tunnel. At the same time, after the support work is completed, the tunnel slag under the trolley can be easily cleaned to facilitate quick departure.

[0005] To achieve the above-mentioned purpose, the present invention provides the following solution: a temporary support trolley for in-situ tunnel reconstruction and expansion based on airbags, comprising:

[0006] A vehicle body, wherein a plurality of running wheels and hydraulic legs are arranged at the bottom edge of the vehicle body, a plurality of pillars are arranged at the top edge of the vehicle body, and a lifting assembly is arranged in each of the plurality of pillars;

[0007] A support plate assembly, the support plate assembly is arranged on the top of the plurality of lifting assemblies, an extension assembly is arranged inside the support plate assembly, and the top of the support plate assembly is used to place a plurality of air bags;

[0008] The ground scraper assembly includes a forward and backward moving mechanism arranged in the vehicle body, the forward and backward moving mechanism is connected to a scraper via a connecting plate, the forward and backward moving mechanism is used to drive the scraper to move along the ground, an automatic lifting mechanism is arranged between the connecting plate and the vehicle body, the automatic lifting mechanism is used to lift the scraper off the ground after scraping is completed.

[0009] Preferably, the forward and backward moving mechanism includes a second screw rod rotatably connected to the vehicle body and a moving block slidably connected to the vehicle body, the second screw rod is arranged along the walking direction of the vehicle body, the moving block is transmission connected to the second screw rod, the connecting plate is hinged on the moving block, a limiting member is arranged between the connecting plate and the moving block, one end of the second screw rod is transmission connected to the second motor, and the second motor is fixedly connected to the vehicle body.

[0010] Preferably, the limiting member comprises a stop block fixedly connected to the side wall of the moving block, the stop block is located above the hinge axis of the connecting plate, and the stop block is arranged corresponding to the side of the connecting plate fixedly connected to the scraper.

[0011] Preferably, the automatic lifting mechanism includes a baffle rod fixedly connected to the vehicle body, the baffle rod is located on a side of the vehicle body close to the stop block, and the baffle rod is arranged corresponding to the top of the connecting plate.

[0012] Preferably, a partition plate is horizontally fixedly connected inside the pillar, and the partition plate divides the pillar into a cavity and a working cavity from top to bottom. The lifting assembly is arranged in the cavity, and an air pump is arranged in the working cavity, and the air pump is used to inflate the plurality of airbags.

[0013] Preferably, the lifting assembly includes a telescopic tube column vertically fixedly connected in the cavity, a telescopic rod is slidably connected in the telescopic tube column, the top of the telescopic rod passes through the top wall of the pillar and is fixedly connected to the support plate assembly, a first screw rod is rotatably connected to the partition plate, the telescopic rod is transmission-connected to the first screw rod, and a driving member is arranged between the bottom of the first screw rod and the partition plate.

[0014] Preferably, the support plate assembly comprises an outer plate, the outer plate is fixedly connected to the top of the telescopic rod, and the outward extension component is arranged inside the outer plate;

[0015] The extension assembly includes two groups of inner plates slidably connected to the two opposite side walls of the outer plate, and racks are fixedly connected to the opposite side walls of the two groups of inner plates respectively. The two groups of racks are arranged in parallel, and gears are meshed between the two groups of racks. The bottom of the outer plate is fixedly connected to a first motor, and the gear is fixedly sleeved on the output shaft of the first motor.

[0016] Preferably, slots are respectively opened inwardly on opposite side walls of the inner plate, and two groups of the slots are respectively arranged corresponding to the two groups of racks.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects: the main function of the hydraulic outrigger is to lift the vehicle body after the vehicle body moves to the working position, so that the walking wheels are off the ground and the stability of the vehicle body is improved; the main function of the pillar is to directly contact the tunnel slag to protect the lifting assembly; the main function of the lifting assembly is to lift the support plate assembly to a suitable position; the main function of the outreach assembly is to expand the area of ​​the support plate assembly so that more airbags can be placed; the main function of the airbag is to support the top of the tunnel through its own inflation; the main function of the front and rear moving mechanism is to drive the scraper to move in one direction under the vehicle body to push away the tunnel slag under the vehicle body; the main function of the automatic lifting mechanism is to ensure that the scraper is separated from the ground when cleaning is not required, so as to ensure the smooth travel of the vehicle body. On the whole, the present invention can adjust the area of ​​the support plate assembly according to the scale of the tunnel, and the assembly adjusts the number of airbags placed to achieve the effect of adjusting the support area of ​​the tunnel top. At the same time, after the support work is completed, the tunnel slag under the trolley can be conveniently cleaned, which is convenient for the trolley to leave quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a front sectional view of the support trolley of the present invention;

[0020] Figure 2 for Figure 1 A partial enlarged view in FIG.

[0021] Figure 3 It is a left side view of the supporting trolley of the present invention;

[0022] Figure 4 is a cross-sectional view of the support plate assembly of the present invention;

[0023] Figure 5 This is a schematic diagram of the scraping state of the floor scraping assembly of the present invention;

[0024] Figure 6 It is a schematic diagram of the automatic lifting mechanism of the present invention lifting the scraper;

[0025] Figure 7 A schematic diagram of a moving block of my invention;

[0026] Among them, 1. body; 2. walking wheel; 3. hydraulic support leg; 4. air pump; 5. pillar; 6. cavity; 7. working cavity; 8. telescopic column; 9. telescopic rod; 10. first screw; 11. support plate assembly; 12. airbag; 13. scraper; 14. connecting plate; 15. outer plate; 16. inner plate; 17. slot; 18. rack; 19. gear; 20. first motor; 21. second motor; 22. second screw; 23. moving block; 24. stop rod; 25. block; 26. threaded hole; 27. third motor; 28. partition plate; 29. ​​first bevel gear; 30. second bevel gear. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figure 1-Figure 7 The present invention provides a temporary support trolley for in-situ tunnel reconstruction and expansion based on airbags, comprising:

[0030] A vehicle body 1, a plurality of running wheels 2 and hydraulic legs 3 are arranged at the bottom edge of the vehicle body 1, a plurality of pillars 5 are arranged at the top edge of the vehicle body 1, and a lifting assembly is arranged in each of the plurality of pillars 5;

[0031] A support plate assembly 11, which is arranged on top of a plurality of lifting assemblies, an extension assembly is arranged inside the support plate assembly 11, and a plurality of air bags 12 are placed on the top of the support plate assembly 11;

[0032] The ground scraper assembly includes a front-and-rear moving mechanism arranged in the vehicle body 1, and a scraper 13 is connected to the front-and-rear moving mechanism through a connecting plate 14. The front-and-rear moving mechanism is used to drive the scraper 13 to move along the ground. An automatic lifting mechanism is arranged between the connecting plate 14 and the vehicle body 1, and the automatic lifting mechanism is used to lift the scraper 13 off the ground after scraping is completed.

[0033] The main function of the traveling wheel 2 is to facilitate the movement of the vehicle body 1; the main function of the hydraulic support leg 3 is to lift the vehicle body 1 after the vehicle body 1 moves to the working position, so that the traveling wheel 2 is off the ground and the stability of the vehicle body 1 is improved; the main function of the pillar 5 is to directly contact the tunnel slag to protect the lifting assembly; the main function of the lifting assembly is to lift the support plate assembly 11 to a suitable position; the main function of the outward extension assembly is to expand the area of ​​the support plate assembly so that more airbags 12 can be placed; the main function of the airbag 12 is to support the top of the tunnel through its own inflation; the main function of the front and rear moving mechanism is to drive the scraper 13 to move in one direction under the vehicle body 1 to push away the tunnel slag under the vehicle body; the main function of the automatic lifting mechanism is to ensure that the scraper 13 is separated from the ground when cleaning is not required, so as to ensure the smooth travel of the vehicle body 1. On the whole, the present invention can adjust the area of ​​the support plate assembly according to the scale of the tunnel, and the assembly can adjust the number of airbags placed to achieve the effect of adjusting the support area of ​​the tunnel top. At the same time, after the support work is completed, the tunnel slag under the trolley can be easily cleaned, which is convenient for the trolley to leave quickly.

[0034] A further optimized solution also includes a control unit, which is electrically connected to the lifting assembly, the outreach assembly and the front and rear moving mechanism.

[0035] A further optimized solution is that the forward and backward moving mechanism includes a second screw rod 22 rotatably connected to the vehicle body 1 and a moving block 23 slidably connected to the vehicle body 1. The second screw rod 22 is arranged along the walking direction of the vehicle body 1, and the moving block 23 is transmission connected to the second screw rod 22. The connecting plate 14 is hinged on the moving block 23. A limiting member is arranged between the connecting plate 14 and the moving block 23. One end of the second screw rod 22 is transmission connected to the second motor 21, and the second motor 21 is fixedly connected to the vehicle body 1.

[0036] Further optimization scheme, such as Figure 7 As shown, a threaded hole 26 is formed on the moving block 23, and the moving block 23 is transmission-connected to the second screw rod 22 through the threaded hole 26. The connecting plate 14 is hinged on one side of the moving block 23.

[0037] As a further optimization scheme, a through groove (not shown in the figure) is opened on the vehicle body 1 along the front-to-back direction, and the moving block 23 is slidably connected in the through groove.

[0038] like Figure 5 As shown, the second motor 21 is controlled to rotate by the control unit, and the rotation of the second motor 21 drives the second screw rod 22 to rotate, so that the movement of the moving block 23 in the vehicle body 1 is realized through the threaded transmission between the second screw rod 22 and the moving block 23, and then the scraper 13 is driven to move at the bottom of the vehicle body 1 by driving the connecting plate 14.

[0039] According to a further optimization scheme, the limiter includes a stopper 25 fixedly connected to the side wall of the moving block 23 , the stopper 25 is located above the hinge axis of the connecting plate 14 , and the stopper 25 is arranged corresponding to one side of the connecting plate 14 fixedly connected to the scraper plate 13 .

[0040] like Figure 5 As shown, when the second screw rod 22 drives the moving block 23 to move to the right, the scraper 13 contacts the bottom slag, and due to the resistance of the slag, the connecting plate 14 tends to rotate clockwise around the hinge axis. At this time, the top of the connecting plate 14 is in contact with the stop block 25 and cannot rotate. Therefore, the connecting plate 14 will move to the right with the moving block 23, and then drive the scraper 13 to push the slag at the bottom of the vehicle body 1 to the right of the vehicle body, thereby achieving a cleaning effect.

[0041] According to a further optimized solution, the automatic lifting mechanism includes a baffle rod 24 fixedly connected to the vehicle body 1 , the baffle rod 24 is located on a side of the vehicle body 1 close to the stop block 25 , and the baffle rod 24 is arranged corresponding to the top of the connecting plate 14 .

[0042] like Figure 6 As shown, when the moving block 23 moves to the right end and makes the connecting plate 14 contact with the blocking rod 24, as the moving block 23 continues to move, the connecting plate 14 will rotate counterclockwise due to the resistance of the blocking rod 24. At this time, the bottom end of the connecting plate 14 will drive the scraper 13 off the ground.

[0043] According to a further optimization scheme, a partition plate 28 is horizontally fixedly connected inside the pillar 5, and the partition plate 28 divides the inside of the pillar 5 into a cavity 6 and a working cavity 7 from top to bottom. The lifting assembly is arranged in the cavity 6, and an air pump 4 is arranged in the working cavity 7. The air pump 4 is used to inflate a plurality of airbags 12.

[0044] like Figure 1 As shown, the side wall of the working chamber 7 is provided with a vent hole to facilitate the normal operation of the air pump 4. At the same time, the upper part of the hydraulic support leg 3 can be arranged in the working chamber 7, thereby reducing the space occupied by the outer side of the vehicle body 1, and the support 5 can protect the hydraulic support leg 3 and the air pump 4.

[0045] A further optimized solution is that the lifting assembly includes a telescopic column 8 vertically fixedly connected in the cavity 6, a telescopic rod 9 is slidably connected in the telescopic column 8, the top of the telescopic rod 9 passes through the top wall of the pillar 5 and is fixedly connected to the support plate assembly 11, a first screw rod 10 is rotatably connected to the partition plate 28, the telescopic rod 9 is transmission-connected to the first screw rod 10, and a driving member is arranged between the bottom of the first screw rod 10 and the partition plate 28.

[0046] A further optimized solution is that the driving member includes a second bevel gear 30 fixedly connected to the bottom of the first screw rod 10 and a third motor 27 fixedly connected to the bottom of the partition plate 28, and the output shaft of the third motor 27 is coaxially fixed with a first bevel gear 29, and the first bevel gear 29 is meshed with the second bevel gear 30.

[0047] like Figure 1 and Figure 2 As shown, the control unit controls the third motor 27 to rotate, and when the third motor 27 rotates, the first screw 10 is driven to rotate through the first bevel gear 29 and the second bevel gear 30, thereby driving the telescopic rod 9 to move upward in the telescopic column 8 through thread transmission. Several telescopic columns 8 rise at the same time to achieve the effect of lifting the support plate assembly 11.

[0048] In a further optimized solution, the support plate assembly 11 includes an outer plate 15, the outer plate 15 is fixedly connected to the top of the telescopic rod 9, and the extension component is arranged inside the outer plate 15;

[0049] The extension assembly includes two groups of inner plates 16 slidably connected to the two opposite side walls of the outer plate 15, and racks 18 are fixedly connected to the opposite side walls of the two groups of inner plates 16 respectively. The two groups of racks 18 are arranged in parallel, and a gear 19 is meshed between the two groups of racks 18. The bottom of the outer plate 15 is fixedly connected to a first motor 20, and the gear 19 is fixedly sleeved on the output shaft of the first motor 20.

[0050] According to a further optimized solution, slots 17 are respectively opened inwardly on opposite side walls of the inner plate 16 , and two groups of slots 17 are respectively arranged corresponding to the two groups of racks 18 .

[0051] like Figure 4 As shown, when the inner plate 16 needs to be extended, the control unit controls the first motor 20 to rotate, and the rotation of the first motor 20 drives the gear 19 to rotate. The gear 19 pushes the two sets of racks 18 outward through gear transmission, so that the two sets of inner plates 16 are extended outward. When the inner plate 16 needs to be retracted, the first motor 20 is controlled to reverse, and the inner plate 16 can be moved inward. The main function of the slot 17 is to insert the rack 18 on the other inner plate 16 into it when the inner plate 16 moves inward, so that the inner plate 16 can be completely retracted into the outer plate 15.

[0052] The working process of this embodiment is as follows: drive the trolley to the working position and support the trolley body 1 with the hydraulic legs 3. According to the height of the subsequent backfill slag, control the third motor 27 to lift the outer plate 15 to the same height as the slag. Then, control the first motor 20 to rotate, expand the two inner plates 16 outward at the same time and contact the tunnel wall. Then, place a suitable number of air bags 12 between the support plate assembly 11 and the tunnel top and connect them to the air pump 4. Inflate the air bags 12 to support the top of the tunnel. Then, carry out subsequent work to backfill the slag into the tunnel. After the slag is backfilled, it contacts the bottom of the support plate assembly 11.

[0053] After the construction is completed, the slag in the hole is cleaned up, and then the second motor 21 is controlled to rotate, so that the moving block 23 moves to the left, and the scraper 13 is lowered. When the moving block 23 moves to the leftmost end of the second screw 22, the second motor 21 is controlled to reverse, and the moving block 23 moves to the right. At this time, the connecting plate 14 contacts the stop block 25, and the scraper 13 is opened to push the slag in the hole on the ground, and the slag at the bottom of the walking wheel 2 and the bottom of the vehicle body 1 is cleaned up. After that, the air pump 4 is controlled to deflate the airbag 12, the third motor 27 is controlled to lower the support plate assembly 11, and the hydraulic support leg 3 is controlled to lower the vehicle body 1, and the vehicle body 1 is driven away.

[0054] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A temporary support trolley for in-situ tunnel reconstruction and expansion based on airbags, characterized in that: include: A vehicle body (1), wherein a plurality of running wheels (2) and hydraulic legs (3) are arranged at the bottom edge of the vehicle body (1), a plurality of pillars (5) are arranged at the top edge of the vehicle body (1), and a lifting assembly is respectively arranged in each of the plurality of pillars (5); A support plate assembly (11), wherein the support plate assembly (11) is arranged on top of the plurality of lifting assemblies, an extension assembly is arranged inside the support plate assembly (11), and the top of the support plate assembly (11) is used to place a plurality of air bags (12); A floor scraper assembly comprises a forward and backward moving mechanism arranged in the vehicle body (1), a scraper (13) being connected to the forward and backward moving mechanism via a connecting plate (14), the forward and backward moving mechanism being used to drive the scraper (13) to move along the floor, an automatic lifting mechanism being arranged between the connecting plate (14) and the vehicle body (1), the automatic lifting mechanism being used to lift the scraper (13) off the floor after scraping is completed.

2. According to claim 1, a temporary support trolley for in-situ tunnel reconstruction and expansion based on airbags is characterized by: The forward and backward moving mechanism comprises a second screw rod (22) rotatably connected to the vehicle body (1) and a moving block (23) slidably connected to the vehicle body (1); the second screw rod (22) is arranged along the walking direction of the vehicle body (1); the moving block (23) is transmission-connected to the second screw rod (22); the connecting plate (14) is hinged to the moving block (23); a limiting member is arranged between the connecting plate (14) and the moving block (23); one end of the second screw rod (22) is transmission-connected to a second motor (21); and the second motor (21) is fixedly connected to the vehicle body (1).

3. According to claim 2, a temporary support trolley for in-situ tunnel reconstruction and expansion based on airbags is characterized by: The limiting member comprises a stop block (25) fixedly connected to the side wall of the moving block (23), the stop block (25) being located above the hinge axis of the connecting plate (14), and the stop block (25) being arranged corresponding to a side of the connecting plate (14) fixedly connected to the scraper (13).

4. According to claim 3, a temporary support trolley for in-situ tunnel reconstruction and expansion based on airbags is characterized in that: The automatic lifting mechanism comprises a blocking rod (24) fixedly connected to the vehicle body (1), the blocking rod (24) being located on a side of the vehicle body (1) close to the stop block (25), and the blocking rod (24) being arranged corresponding to the top of the connecting plate (14).

5. According to claim 1, a temporary support trolley for in-situ tunnel reconstruction and expansion based on airbags is characterized by: A partition plate (28) is horizontally fixedly connected inside the pillar (5), and the partition plate (28) divides the inside of the pillar (5) into a cavity (6) and a working cavity (7) from top to bottom. The lifting assembly is arranged in the cavity (6), and an air pump (4) is arranged in the working cavity (7). The air pump (4) is used to inflate the plurality of airbags (12).

6. The temporary support trolley for in-situ tunnel reconstruction and expansion based on airbags according to claim 5 is characterized by: The lifting assembly includes a telescopic tube column (8) vertically fixedly connected in the cavity (6), a telescopic rod (9) slidably connected in the telescopic tube column (8), the top of the telescopic rod (9) passes through the top wall of the pillar (5) and is fixedly connected to the support plate assembly (11), a first screw rod (10) is rotatably connected to the partition plate (28), the telescopic rod (9) is transmission-connected to the first screw rod (10), and a driving member is provided between the bottom of the first screw rod (10) and the partition plate (28).

7. The temporary support trolley for in-situ tunnel reconstruction and expansion based on airbags according to claim 6 is characterized by: The support plate assembly (11) comprises an outer plate (15), the outer plate (15) is fixedly connected to the top of the telescopic rod (9), and the extension component is arranged inside the outer plate (15); The extension assembly comprises two groups of inner plates (16) slidably connected to the two opposite side walls of the outer plate (15); racks (18) are fixedly connected to the opposite side walls of the two groups of inner plates (16), the two groups of racks (18) are arranged in parallel, and a gear (19) is meshed between the two groups of racks (18); a first motor (20) is fixedly connected to the bottom of the outer plate (15), and the gear (19) is fixedly sleeved on the output shaft of the first motor (20).

8. The temporary support trolley for in-situ tunnel reconstruction and expansion based on airbags according to claim 7 is characterized by: Slots (17) are respectively provided inwardly on opposite side walls of the inner plate (16), and two groups of the slots (17) are respectively arranged corresponding to the two groups of racks (18).

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