Tunnel wind cylinder support structure and tunnel construction trolley

Abstract

The application relates to a tunnel air duct support structure and a tunnel construction trolley, and relates to the technical field of tunnel construction equipment. The tunnel air duct support structure comprises at least two spaced support assemblies, the support assembly comprises a connecting piece, a support ring and a plurality of rollers, one end of the connecting piece is connected with the support ring, and the other end of the connecting piece is used for being connected with a tunnel trolley; a plurality of mounting grooves are arranged on the inner wall of the support ring along the circumference of the support ring, the rollers are located in the mounting grooves and are rotationally connected with the mounting grooves, the highest point of the roller protrudes from the curved surface of the inner wall of the support ring, and the axis of the roller is perpendicular to the axis of the support ring. The application has the effects of reducing the probability of tunnel air duct damage and air leakage, and ensuring the circulation and quality of air in the tunnel.

Description

Technical Field

[0001] This application relates to the field of tunnel construction equipment technology, and in particular to a tunnel ventilation duct support structure and a tunnel construction trolley. Background Technology

[0002] A ventilation duct is an important auxiliary facility used in conjunction with ventilation equipment to deliver fresh air to tunnel construction. Ventilation ducts are usually installed at tunnel entrances or key locations to guide air into the tunnel or exhaust smoke. Ventilation ducts play an important role in tunnel ventilation systems, providing uniform, diffused, and optimized ventilation to ensure air circulation and quality within the tunnel.

[0003] The related technology discloses a tunnel ventilation duct cloth crossing trolley air volume loss reduction installation structure, including ventilation duct cloth and secondary lining trolley. The secondary lining trolley is placed at the secondary lining pouring position in the tunnel. The ventilation duct cloth is suspended from the tunnel entrance to the working face along the tunnel extension direction. The position on the secondary lining trolley directly opposite the ventilation duct cloth is occupied. Ventilation duct cloth guide cages are fixedly installed on both the front and rear sides of the secondary lining trolley. The two ventilation duct cloth guide cages are symmetrically arranged to guide the ventilation duct cloth to the inside of the tunnel to avoid the occupied position. Each ventilation duct cloth guide cage is a hollow cylindrical structure with open ends, welded from steel bars.

[0004] Regarding the aforementioned technologies, since the duct cloth passes through the duct cloth guide cage, the friction between the duct cloth and the duct cloth guide cage during the trolley's forward movement can easily lead to damage and air leakage of the duct cloth. Summary of the Invention

[0005] To reduce the probability of air leakage due to damage to the ventilation duct fabric, this application provides a tunnel ventilation duct support structure and a tunnel construction trolley.

[0006] In a first aspect, this application provides a tunnel ventilation duct support structure, which adopts the following technical solution: A tunnel ventilation duct support structure includes at least two spaced-apart support components. Each support component includes a connector, a support ring, and multiple rollers. One end of the connector is connected to the support ring, and the other end of the connector is used to connect to a tunnel trolley. The inner wall of the support ring is provided with a plurality of mounting grooves spaced apart along its circumference. The roller is located in the mounting groove and is rotatably connected to the mounting groove. The highest point of the roller protrudes from the curved surface of the inner wall of the support ring. The axis of the roller is perpendicular to the axis of the support ring.

[0007] By adopting the above technical solution, the tunnel ventilation duct passes through the support ring, and the outer wall of the tunnel ventilation duct contacts the roller. When the trolley moves back and forth, the roller is driven by the tunnel ventilation duct and rotates. This changes the original rigid friction of the tunnel ventilation duct to rolling friction, thereby greatly reducing the friction force on the tunnel ventilation duct, reducing the probability of tunnel ventilation duct damage and air leakage, and ensuring the circulation and quality of air in the tunnel.

[0008] Optionally, the roller includes a cylinder and two roller shafts, the roller shafts being fixedly connected to the end of the cylinder; One of the rollers has a connecting hole along its axial direction, and the cylinder has a plurality of air jet holes spaced apart along its circumference. One end of each air jet hole is connected to the connecting hole, and the other end extends to the surface of the cylinder. The axis of each air jet hole is arc-shaped, and the plurality of air jet holes are arranged in rotational symmetry. The support assembly also includes an air supply mechanism for supplying air to the connecting hole.

[0009] By adopting the above technical solution, compressed air is supplied to the connecting hole through the air supply mechanism while the trolley moves. When the gas is ejected from the jet hole, it can drive the roller to rotate. On the one hand, the jetting airflow can blow off the dust on the surface of the tunnel ventilation duct and in the installation groove, preventing dust from accumulating in the gap between the roller and the installation groove. On the other hand, the jetting airflow forms an air layer between the roller and the ventilation duct cloth, which can reduce the friction between the roller and the ventilation duct cloth, further reducing the probability of tunnel ventilation duct damage and air leakage.

[0010] Optionally, the support ring has an air inlet hole communicating with the connecting hole. The air supply mechanism includes an air inlet pipe and a rotary joint. One end of the air inlet pipe is installed in the air inlet hole, and the other end of the air inlet pipe extends to the outside of the support ring. The rotary joint is connected between the air inlet pipe and the roller shaft.

[0011] By adopting the above technical solution, compressed air enters from the air inlet pipe, passes through the rotary joint and is sent into the connecting hole. The rotary joint allows compressed air to be sent in while the roller is rotating.

[0012] Optionally, the support assembly further includes a dustproof mechanism located at the gap between the cylinder and the mounting groove. The dustproof mechanism includes a fixing frame and bristles. The fixing frame is detachably connected to the mounting groove, and one end of the bristles is connected to the fixing frame, while the other end contacts the roller.

[0013] By adopting the above technical solution, due to the large amount of dust generated during tunnel construction, dust is also easily adhered to the surface of the tunnel ventilation duct. If dust accumulates in the gap between the roller and the mounting groove, it may cause the roller to fail to rotate. The fixing frame serves to fix the brush bristles, which can cover the gap between the roller and the mounting groove, reducing the probability of dust causing the roller to fail to rotate. When there is a lot of dust on the brush bristles, the fixing frame can be removed to clean or replace the brush bristles.

[0014] Optionally, a support assembly is also included, located between the two support assemblies, for supporting the tunnel ventilation duct.

[0015] By adopting the above technical solution, since the tunnel ventilation duct is flexible, the tunnel ventilation duct between the two support rings is prone to sagging. When the trolley moves, the friction between the tunnel ventilation duct and the roller increases. The support component can lift the tunnel ventilation duct and prevent it from sagging, thereby avoiding the increase of friction between the tunnel ventilation duct and the roller.

[0016] Optionally, the support assembly includes a plurality of support rods, which are arranged along the axial direction of the support ring and spaced apart circumferentially along the support ring. The circle formed by the support rods is coaxial with the support ring.

[0017] By adopting the above technical solution, when the trolley moves, the tunnel ventilation duct between the two support rings is supported by the support rod, thereby maintaining coaxiality with the support ring and preventing the tunnel ventilation duct from sagging.

[0018] Optionally, the support assembly further includes a plurality of balls, and the support rod is provided with a plurality of rolling grooves spaced apart along its length, the balls being tactilely connected to the rolling grooves, and the balls protruding from the rolling grooves.

[0019] By adopting the above technical solution, the ball bearings transform the rigid friction between the tunnel ventilation duct and the support rod into rolling friction, thereby reducing the friction between the tunnel ventilation duct and the support rod and reducing the probability of tunnel ventilation duct damage and air leakage.

[0020] Secondly, this application provides a tunnel construction trolley, which adopts the following technical solution: A tunnel construction trolley includes the aforementioned tunnel ventilation duct support structure, trolley body, and tunnel ventilation duct. One end of the connector is connected to the trolley body, and the tunnel ventilation duct passes through at least two of the support rings in sequence.

[0021] By adopting the above technical solution, the connecting piece fixes the support ring on the trolley. The tunnel ventilation duct passes through two support rings at a time. When the trolley moves back and forth, the roller is driven by the tunnel ventilation duct and rotates. This can change the original rigid friction of the tunnel ventilation duct into rolling friction, thereby greatly reducing the friction force on the tunnel ventilation duct and reducing the probability of tunnel ventilation duct damage and air leakage.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up support rings and rollers, when the trolley moves back and forth, the rollers are driven by the tunnel ventilation duct and rotate, which can change the original rigid friction of the tunnel ventilation duct into rolling friction, thereby greatly reducing the friction force on the tunnel ventilation duct, reducing the probability of tunnel ventilation duct damage and air leakage, and ensuring the circulation and quality of air in the tunnel. 2. By setting up air jet holes, connecting holes, and an air supply mechanism, compressed air is supplied to the connecting holes through the air supply mechanism while the trolley moves. When the gas is ejected from the air jet holes, it can drive the roller to rotate. On the one hand, the jetting airflow can blow off the dust on the surface of the tunnel ventilation duct and in the installation groove, preventing dust from accumulating in the gap between the roller and the installation groove. On the other hand, the jetting airflow forms an air layer between the roller and the ventilation duct cloth, which can reduce the friction between the roller and the ventilation duct cloth, further reducing the probability of tunnel ventilation duct damage and air leakage. 3. By setting up support rods and ball bearings, the support rods prevent the tunnel ventilation duct from sagging, and the ball bearings change the rigid friction between the tunnel ventilation duct and the support rods into rolling friction, thereby reducing the friction between the tunnel ventilation duct and the support rods and reducing the probability of tunnel ventilation duct damage and air leakage. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a tunnel ventilation duct support structure according to an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the support component of a tunnel ventilation duct support structure according to an embodiment of this application.

[0025] Figure 3 yes Figure 2 Enlarged view of section A.

[0026] Figure 4 This is a cross-sectional view of a support component of a tunnel ventilation duct support structure according to an embodiment of this application.

[0027] Figure 5 yes Figure 4 Enlarged view of section B.

[0028] Figure 6 This is a cross-sectional view of the roller of a tunnel ventilation duct support structure according to an embodiment of this application.

[0029] Figure 7 yes Figure 1 Enlarged view of section C.

[0030] Figure 8 This is a schematic diagram of the structure of a tunnel construction trolley according to an embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Support assembly; 11. Connector; 12. Support ring; 121. Mounting groove; 1211. Fixing groove; 13. Roller; 131. Cylinder body; 132. Roller shaft; 14. Air supply mechanism; 141. Air inlet pipe; 142. Rotary joint; 143. Air delivery pipe; 15. Dustproof mechanism; 151. Fixing frame; 152. Brush bristles; 2. Connecting hole; 3. Air jet hole; 4. Air inlet; 5. Support assembly; 51. Support rod; 511. Rolling groove; 52. Ball bearing; 6. Trolley body; 7. Tunnel ventilation duct. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0033] This application discloses a tunnel ventilation duct support structure. (Refer to...) Figure 1 The tunnel ventilation duct support structure includes at least two spaced-apart support components 1. The number of support components 1 can be determined according to the length of the tunnel ventilation duct 7 at the tunnel trolley. In this embodiment, two support components 1 are provided. The support component 1 includes a connector 11, a support ring 12, and multiple rollers 13. The connector 11 consists of three spaced-apart steel sheets. One end of the connector 11 is welded to the outer wall of the support ring 12, and the other end of the connector 11 is used for welding to the tunnel trolley.

[0034] Reference Figure 2-3 To reduce the frictional force on the tunnel ventilation duct 7 when the trolley moves, multiple mounting grooves 121 are evenly spaced along the circumference of the inner wall of the support ring 12. The number of mounting grooves 121 can be 8, 13, or 18, as long as it can reduce the frictional force between the tunnel ventilation duct 7 and the support ring 12. In this embodiment, there are 8 mounting grooves 121. The roller 13 is located inside the mounting groove 121 and is rotatably connected to the mounting groove 121. The highest point of the roller 13 protrudes from the curved surface of the inner wall of the support ring 12, and the axis of the roller 13 is perpendicular to the axis of the support ring 12. The tunnel ventilation duct 7 passes through the support ring 12, and the outer wall of the tunnel ventilation duct 7 contacts the roller 13. When the trolley moves back and forth, the roller 13 is driven by the tunnel ventilation duct 7 and rotates, which can change the original rigid friction of the tunnel ventilation duct 7 into rolling friction, thereby greatly reducing the frictional force on the tunnel ventilation duct 7 and reducing the probability of damage and air leakage of the tunnel ventilation duct 7.

[0035] Reference Figure 4-5To further reduce the probability of air leakage due to damage to the tunnel ventilation duct 7, the roller 13 includes a cylinder body 131 and two roller shafts 132, which are welded to the ends of the cylinder body 131. One of the roller shafts 132 has a connecting hole 2 along its axial direction, and the cylinder body 131 has multiple air jet holes 3 at equal intervals along its circumference. The number of air jet holes 3 can be 4, 7, or 10, as long as it can reduce the friction between the tunnel ventilation duct 7 and the roller 13. In this embodiment, the number of air jet holes 3 is 4. One end of the air jet hole 3 is connected to the connecting hole 2, and the other end extends to the surface of the cylinder body 131. The axis of the air jet hole 3 is arc-shaped, and the 4 air jet holes 3 are arranged in a rotationally symmetrical manner.

[0036] Reference Figure 3-5 Due to the significant dust generated during tunnel construction, dust easily adheres to the surface of the tunnel ventilation duct 7. If dust accumulates in the gap between the roller 13 and the mounting groove 121, the roller 13 may become unable to rotate. Therefore, the support assembly 1 also includes a dustproof mechanism 15, located in the gap between the cylinder 131 and the mounting groove 121. The dustproof mechanism 15 includes a fixing frame 151 and bristles 152. The mounting groove 121 has a fixing groove 1211 that mates with the fixing frame 151. The fixing frame 151 is placed in the fixing groove 1211, and the fixing frame 151 and the fixing groove 1211 are connected by screws. One end of the bristles 152 is bonded to the fixing frame 151, and the other end contacts the roller 13, covering the gap between the mounting groove 121 and the roller 13. The fixing frame 151 serves to fix the brush bristles 152. The brush bristles 152 can reduce the probability that dust will cause the roller 13 to fail to rotate. When there is a lot of dust on the brush bristles 152, the fixing frame 151 can be removed to clean or replace the brush bristles 152.

[0037] Reference Figure 5-6 To facilitate air supply to the connecting hole 2, an air inlet 4 communicating with the connecting hole 2 is provided in the support ring 12. The support assembly 1 also includes an air supply mechanism 14 for supplying air to the connecting hole 2. The air supply mechanism 14 includes an air inlet pipe 141 and a rotary joint 142. One end of the air inlet pipe 141 is installed in the air inlet 4, and the other end of the air inlet pipe 141 extends to the outside of the support ring 12. Multiple air inlets 141 are connected to an annular air delivery pipe 143. The rotary joint 142 is connected between the air inlet pipe 141 and the roller 132. As the trolley moves, compressed air enters through the air inlet pipe 141, passes through the rotary joint 142 and is sent into the connecting hole 2, and then is ejected from the jet hole 3, which can drive the roller 13 to rotate. On the one hand, the jetting airflow can blow away the dust on the surface of the tunnel ventilation duct 7 and in the mounting groove 121, preventing dust from accumulating in the gap between the roller 13 and the mounting groove 121; on the other hand, the jetting airflow forms an air layer between the roller 13 and the ventilation duct cloth, which can reduce the friction between the roller 13 and the ventilation duct cloth, further reducing the probability of the tunnel ventilation duct 7 being damaged and leaking air.

[0038] Reference Figure 7 Because the tunnel ventilation duct 7 is flexible, it is prone to sagging between the two support rings 12, which increases the friction between the tunnel ventilation duct 7 and the roller 13 when the trolley moves. Therefore, the support structure of the tunnel ventilation duct 7 also includes a support assembly 5, which is located between the two support assemblies 1. The support assembly 5 includes multiple support rods 51 and multiple balls 52. In this embodiment, there are 6 support rods 51, which are arranged along the axial direction of the support ring 12. The multiple support rods 51 are evenly spaced along the circumference of the support ring 12, and the circle formed by the support rods 51 is coaxial with the support ring 12. Eleven rolling grooves 511 are evenly spaced along the length of the support rod 51. Each support rod 51 has 11 balls 52, which are rolled in connection with the rolling grooves 511 and protrude from the rolling grooves 511. The support rod 51 supports the tunnel ventilation duct 7 and prevents it from sagging. The ball bearing 52 changes the rigid friction between the tunnel ventilation duct 7 and the support rod 51 into rolling friction, thereby reducing the friction between the tunnel ventilation duct 7 and the support rod 51 and reducing the probability of the tunnel ventilation duct 7 being damaged and leaking air.

[0039] This application also discloses a tunnel construction trolley. (See attached embodiments.) Figure 8 The tunnel construction trolley includes the aforementioned tunnel ventilation support structure, trolley body 6, and tunnel ventilation 7. The end of the connector 11 away from the support ring 12 is welded to the trolley body 6, and the tunnel ventilation 7 passes through the two support rings 12 in sequence.

[0040] The implementation principle of a tunnel construction trolley according to an embodiment of this application is as follows: During installation, the tunnel ventilation duct 7 passes through two support rings 12. While the trolley moves, compressed air enters through the air inlet pipe 141, passes through the rotary joint 142 into the connecting hole 2, and is then ejected from the air jet hole 3, driving the roller 13 to rotate and reducing the friction between the roller 13 and the ventilation duct cloth. The support rod 51 prevents the tunnel ventilation duct 7 from sagging, and the ball bearings 52 change the rigid friction between the tunnel ventilation duct 7 and the support rod 51 into rolling friction, thereby reducing the friction between the tunnel ventilation duct 7 and the support rod 51. This application has the advantage of reducing the probability of damage and air leakage to the tunnel ventilation duct 7.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tunnel ventilation duct support structure, characterized in that: It includes at least two spaced support components (1), each support component (1) including a connector (11), a support ring (12) and a plurality of rollers (13), one end of the connector (11) being connected to the support ring (12) and the other end of the connector (11) being used to connect to a tunnel trolley; The inner wall of the support ring (12) is provided with a plurality of mounting grooves (121) spaced apart along its circumference. The roller (13) is located in the mounting groove (121) and is rotatably connected to the mounting groove (121). The highest point of the roller (13) protrudes from the curved surface of the inner wall of the support ring (12). The axis of the roller (13) is perpendicular to the axis of the support ring (12). The roller (13) includes a cylinder (131) and two roller shafts (132), the roller shafts (132) being fixedly connected to the ends of the cylinder (131); One of the rollers (132) has a connecting hole (2) along its axial direction, and the cylinder (131) has a plurality of air jet holes (3) spaced apart along its circumference. One end of the air jet hole (3) is connected to the connecting hole (2), and the other end extends to the surface of the cylinder (131). The axis of the air jet hole (3) is arc-shaped, and the plurality of air jet holes (3) are arranged in rotational symmetry. The support assembly (1) also includes an air supply mechanism (14) for supplying air to the connecting hole (2).

2. The tunnel ventilation duct support structure according to claim 1, characterized in that: The support ring (12) has an air inlet (4) that communicates with the connecting hole (2). The air supply mechanism (14) includes an air inlet pipe (141) and a rotary joint (142). One end of the air inlet pipe (141) is installed in the air inlet (4), and the other end of the air inlet pipe (141) extends to the outside of the support ring (12). The rotary joint (142) is connected between the air inlet pipe (141) and the roller (132).

3. The tunnel ventilation duct support structure according to claim 1, characterized in that: The support assembly (1) also includes a dustproof mechanism (15), which is located in the gap between the cylinder (131) and the mounting groove (121). The dustproof mechanism (15) includes a fixing frame (151) and bristles (152). The fixing frame (151) is detachably connected to the mounting groove (121). One end of the bristles (152) is connected to the fixing frame (151), and the other end is in contact with the roller (13).

4. The tunnel ventilation duct support structure according to claim 1, characterized in that: It also includes a support component (5) located between the two support components (1) for supporting the tunnel ventilation duct (7).

5. A tunnel ventilation duct support structure according to claim 4, characterized in that: The support assembly (5) includes a plurality of support rods (51), which are arranged along the axial direction of the support ring (12). The plurality of support rods (51) are arranged circumferentially spaced along the support ring (12), and the circle formed by the support rods (51) is coaxial with the support ring (12).

6. The tunnel ventilation duct support structure according to claim 5, characterized in that: The support assembly (5) also includes a plurality of balls (52), and a plurality of rolling grooves (511) are spaced apart along the length of the support rod (51). The balls (52) are tactilely connected to the rolling grooves (511), and the balls (52) protrude from the rolling grooves (511).

7. A tunnel construction trolley, characterized in that: The tunnel ventilation duct support structure, trolley body (6) and tunnel ventilation duct (7) as described in any one of claims 1-6 are included, one end of the connector (11) is connected to the trolley body (6), and the tunnel ventilation duct (7) passes through at least two of the support rings (12) in sequence.

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