Tunnel secondary lining construction trolley with ventilation and heat dissipation air duct device

Abstract

The tunnel secondary lining construction trolley with a ventilation and heat dissipation duct device provided by the present invention includes a portal frame, a top form, a side form, an air intake system and a ventilation and heat dissipation duct device; the portal frame includes a column, a middle crossbeam and a top crossbeam, and the fresh air duct of the air intake system passes through the portal frame; the ventilation and heat dissipation duct device includes an air suction port component, an exhaust fan, a longitudinal air duct component and a jet outlet component; the air suction port component is arranged on the first side; a plurality of longitudinal air duct components are arranged along the circumference of the tunnel and cover the operating space; the longitudinal air duct component is provided with a longitudinal air outlet; a plurality of jet outlet components are arranged longitudinally on the longitudinal air duct component, and the jet outlet component is provided with a jet outlet, and the air outlet direction of the jet outlet is adjustable. The present invention can meet the working environment requirements of the construction personnel while meeting the tunnel return air speed requirements, effectively solving the construction ventilation and safety management problems such as the trolley blocking the return air, the high temperature working environment and the accumulation of harmful gases.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction engineering, and in particular to a tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device. Background Art

[0002] In tunnel construction, tunnel ventilation technology is related to construction safety, construction organization and construction equipment efficiency, especially for long tunnels and special tunnels with toxic and harmful gases, construction ventilation technology is crucial.

[0003] Tunnel construction ventilation involves two parts: fresh air intake and polluted air return. Fresh air is mainly delivered to the working face through the fresh air duct by the blower, and the fresh air duct should be as close to the construction face as possible to achieve the best ventilation and dust reduction effect. In addition, in the gas tunnel construction specifications, see Figure 1 , it is required that the distance between the fresh air duct 921 and the heading face 991 shall not be greater than 15m, and the tunnel polluted air return air must also meet the minimum wind speed requirement of 0.25m / s to ensure normal air intake and return air operation.

[0004] During secondary lining construction, a tunnel secondary lining construction trolley is required to enter the tunnel. The trolley consists of a gantry, top formwork, and side formwork. The top formwork is connected to the gantry's top beam via a jacking mechanism containing hydraulic cylinders, while the side formwork is connected to the gantry's columns via an external support mechanism containing hydraulic cylinders. The fresh air duct 921 passes through the gantry of the secondary lining construction trolley 91.

[0005] See also Figure 1 The return air of the tunnel polluted air is blocked when passing through the tunnel second lining construction trolley 91, the overall return air effect is affected, and the overall working environment temperature of the operating space 91 above the second lining trolley increases, which has a great impact on the workers' operation and construction and does not meet the occupational health working environment temperature requirements. In addition, the return air of the gas tunnel contains toxic gas. The deterioration of the return air effect of the operating space above the second lining trolley will directly lead to gas accumulation and it is difficult to discharge it in time, posing a huge safety hazard.

[0006] Existing tunnel secondary lining construction trolleys lack enhanced return air facilities. To address this issue, on-site workers can either cut into the fresh air ducts for ventilation and cooling, but this method can easily increase air loss in the ducts, thereby affecting tunnel face ventilation. Alternatively, they can install several small fans on the trolley's operating platform for cooling. However, these existing methods fail to effectively and safely reduce temperatures and fail to effectively prevent gas accumulation, posing significant safety risks on site. Summary of the Invention

[0007] The object of the present invention is to provide a tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device, which effectively solves the ventilation problem of tunnel construction and the safety problem of trolley construction.

[0008] The tunnel secondary lining construction trolley with a ventilation and heat dissipation duct device provided by the present invention comprises a portal frame, a top form, a side form and an air intake system; the portal frame comprises columns, a middle crossbeam and a top crossbeam, the middle crossbeam and the top crossbeam are both connected between the two columns, and the top crossbeam is located above the middle crossbeam; the side formwork is connected to the columns, and the top formwork is connected to the top crossbeam; a middle space is formed between the middle crossbeam and the top crossbeam, and an operating space is formed between the top crossbeam and the top formwork, and along the longitudinal direction of the tunnel, the portal frame has a first side and a second side opposite to each other, and the middle space and the operating space both pass through between the first side and the second side along the longitudinal direction of the tunnel; the air intake system comprises a fresh air duct and a blower, and the fresh air duct passes through the middle space; it has ventilation The tunnel secondary lining construction trolley of the heat dissipation duct device also includes a ventilation and heat dissipation duct device; the ventilation and heat dissipation duct device includes an air suction port component, an exhaust fan, a longitudinal air duct component and a jet outlet component connected in sequence; the air suction port component is arranged on the first side; the longitudinal air duct component extends longitudinally, and multiple longitudinal air duct components are arranged above the operating space and / or on both sides of the operating space in the circumferential direction of the tunnel; the extended end of the longitudinal air duct component is located on the second side, and the extended end is provided with a longitudinal air outlet; multiple jet outlet components are arranged longitudinally on the longitudinal air duct component, and the jet outlet component has a jet outlet, the jet outlet faces the operating space, and the air outlet direction of the jet outlet can be adjusted between the radial and longitudinal directions of the tunnel.

[0009] As can be seen from the above scheme, after the exhaust fan is started, the polluted air can enter from the air intake and be ejected from multiple jet air outlets to reach the operating space on the trolley arch, that is, the area where gas accumulates and high temperature is concentrated. The multiple longitudinal air duct members extending longitudinally and arranged circumferentially disperse the multiple jet air outlets and cover the entire operating space, ensuring ventilation and cooling in all parts of the operating space. In addition, the use of jet air outlets can enhance the airflow effect, and the outlet angles of the multiple jet air outlets can be adjusted based on the real-time environmental requirements of the operating space and the return air speed requirements of the tunnel. Therefore, it can meet the working environment requirements of the construction personnel while meeting the return air speed requirements of the tunnel, effectively solving the construction ventilation and safety management problems such as the trolley blocking the return air, the high temperature working environment, and the accumulation of harmful gases.

[0010] A further solution is that the ventilation and heat dissipation duct device also includes an air guide bend and a central air outlet piece; the exhaust fan, the longitudinal duct piece and the central air outlet piece are connected in sequence, and the air guide bend extends from the central space to the operating space; a central air outlet is provided on the central air outlet piece, at least one central air outlet piece is located in the central space and the central air outlet on the central air outlet piece faces the second side.

[0011] As can be seen from the above, while achieving decentralized ventilation in the vault operating space, setting up a central air outlet can also form airflow in the middle space of the trolley, effectively increasing the return air speed of the tunnel and further enhancing the integrity of the polluted air return effect.

[0012] A further solution is that a lower space is formed below the middle cross beam, and the lower space runs longitudinally between the first side and the second side; at least another middle air outlet piece extends downward from the middle space toward the lower space, and the middle air outlet of the middle air outlet piece faces the lower space.

[0013] As can be seen from the above, setting the middle air outlet towards the lower space can also form a return air flow in the lower space of the trolley, further effectively increasing the return air speed in the tunnel.

[0014] A further solution is that the ventilation and heat dissipation air duct device also includes a sealing mechanism; the sealing mechanism is arranged at the middle air outlet, and the sealing mechanism can seal the middle air outlet.

[0015] As can be seen from the above, the middle air outlet can be opened selectively when the return air speed in the measured trolley area is slow. When the return air speed in the measured trolley area meets the demand, the middle air outlet can be blocked to enhance the blowing effect of the arch operating space to further improve the working environment quality of the construction workers.

[0016] A further solution is that the ventilation and heat dissipation duct device also includes an annular wind box, which is connected to the air guide elbow and the longitudinal wind duct member; the annular wind box extends in an annular direction, and the extension starting ends of multiple longitudinal wind duct members are all connected to the annular wind box.

[0017] As can be seen from the above, this arrangement makes the installation structure of the ventilation and heat dissipation duct device more stable, and the airflow reaching each longitudinal duct member is more uniform and smooth.

[0018] A further solution is that the jet air outlet component includes a radial tube component and a spherical air outlet component; the radial tube component is connected to the longitudinal air duct component, and a ball socket mounting position is formed in the radial tube component; the jet air outlet is formed on the spherical air outlet component, and the spherical air outlet component is movably mounted on the ball socket mounting position.

[0019] A further solution is that the radial tube component includes a tube component and a retaining ring component connected along its own extension direction, and the ball and socket mounting position is formed between the tube component and the retaining ring component.

[0020] As can be seen from the above, this setting gives the jet air outlet a greater degree of freedom in adjustment of the air outlet direction, and the installation method of the pipe component and the baffle ring component makes it easy to disassemble and replace the spherical air outlet parts and easy to adjust the spherical air outlet parts. Each spherical air outlet part can be adjusted independently, and each construction worker can find one or more spherical air outlet parts closest to him or her and adjust them according to his or her own needs, thereby enabling each construction worker to obtain a safer and more comfortable working environment.

[0021] A further solution is that the exhaust fan is fixedly arranged in the middle space, and in the longitudinal direction, the exhaust fan is close to the first side and away from the second side.

[0022] A further solution is that along the penetrating direction of the air suction port component, the opposite ends of the air suction port component are respectively an inlet end and an outlet end, the outlet end is connected to the exhaust fan, and the outer diameter of the inlet end is larger than the outer diameter of the outlet end.

[0023] As can be seen from the above, the exhaust fan is installed in the middle space, which makes use of the idle space on the door frame and does not affect the construction workers; and the outward-expanding air intake component is conducive to sucking in more polluted air and enhancing the recovery effect.

[0024] A further solution is that a plurality of longitudinal air duct members are fixedly connected to the top mold.

[0025] As can be seen from the above, this arrangement can increase the stability of the multiple longitudinal air duct members. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device in the background art during construction in a tunnel.

[0027] Figure 2 This is a schematic diagram of an embodiment of a tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device according to the present invention in the longitudinal direction of the tunnel.

[0028] Figure 3 This is a schematic diagram of an embodiment of a tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device according to the present invention in the transverse direction of the tunnel.

[0029] Figure 4 This is a schematic diagram of the ventilation and heat dissipation duct device of an embodiment of a tunnel secondary lining construction trolley with a ventilation and heat dissipation duct device in the longitudinal direction of the tunnel.

[0030] Figure 5 This is an exploded view of the ventilation and heat dissipation duct device of the tunnel secondary lining construction trolley embodiment of the present invention having the ventilation and heat dissipation duct device in the transverse direction of the tunnel.

[0031] Figure 6 This is a cross-sectional view of the jet air outlet component of the tunnel secondary lining construction trolley embodiment with a ventilation and heat dissipation air duct device in the first usage state.

[0032] Figure 7 This is a cross-sectional view of the jet air outlet component of the tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device in the second use state of the embodiment of the present invention.

[0033] Figure 8 This is a cross-sectional view of the middle air outlet of an embodiment of a tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device according to the present invention. DETAILED DESCRIPTION

[0034] See also Figure 2 and Figure 3The tunnel secondary lining construction trolley with a ventilation and heat dissipation duct device of this embodiment includes a portal frame 1, a top formwork 21, a side formwork 22, a travel system 29, an air inlet system, and an air outlet system. The portal frame 1 includes two upright columns 13 standing on either side, a middle crossbeam 12 connected between the middle portions of the two columns 13, and a top crossbeam 11 connected between the tops of the two columns 13.

[0035] The lower part of the middle cross beam 12 forms a lower space 101, the upper part of the middle cross beam 12 and the lower part of the top cross beam 11 form a middle space 102, and the upper part of the top cross beam 11 forms an operating space 103. Figure 3 As shown, along the longitudinal direction of the tunnel, the portal frame 1 has an opposite first side 108 and a second side 109 , and the lower space 101 , the middle space 102 and the operating space 103 all pass through the first side 108 and the second side 109 along the longitudinal direction of the tunnel.

[0036] The top mold 21 is composed of multiple individual top mold units. It is connected to the upper side of the top crossbeam 11 via hydraulic cylinders and other supporting structures. The operating space 103 is located below the top mold 21. The side molds 22 are connected to the lateral sides of the columns 13 via hydraulic cylinders and other supporting structures. A travel system 29 is provided at the bottom of the columns 13. Furthermore, the air intake system includes a fresh air duct 23 and a blower. The fresh air duct 23 passes through the central space 102 in the longitudinal direction of the tunnel.

[0037] See also Figures 2 to 5 The ventilation and heat dissipation duct device includes an interconnected air intake component 31, an exhaust fan 32, an air guide bend 33, an annular air box 34, multiple longitudinal air duct components 4, multiple jet outlet components 5, and multiple central air outlet components 6. The jet outlet components 5 form jet outlets 520, and the air intake component 31, exhaust fan 32, air guide bend 33, annular air box 34, longitudinal air duct components 4, and jet outlet components 5 are sequentially connected. The central air outlet component 6 forms a central air outlet 60, and the air intake component 31, exhaust fan 32, air guide bend 33, and central air outlet component 6 are sequentially connected.

[0038] The air intake component 31 is trumpet-shaped. Specifically, along the direction of penetration of the air intake component 31, the opposite ends of the air intake component 31 are an inlet end 311 and an outlet end 312. The outer diameter of the inlet end 311 is larger than the outer diameter of the outlet end 312, and the outer diameter of the air intake component 31 gradually decreases from the inlet end 311 to the outlet end 312. In addition, a protective net is provided at the inlet end 311 for filtering and protection.

[0039] The exhaust fan 32 is fixed on the middle space 102 and close to the first side 108 . The outlet end 312 of the air suction port component 31 is fixedly connected and communicated with the exhaust fan 32 . The inlet end 311 of the air suction port component 31 is located on the first side 108 and outside the middle space 102 .

[0040] like Figure 3 and Figure 5 As shown, the longitudinal air duct member 4 extends between the first side 108 and the second side 109 along the longitudinal direction of the tunnel. Figure 2 and Figure 4 As shown, multiple longitudinal duct members 4 are arranged circumferentially along the tunnel above and on both sides of the operating space 103. That is, the multiple longitudinal duct members 4 cover and surround the entire operating space 103 as much as possible. The extended end 402 of the longitudinal duct member 4 is located on the second side 109 and is provided with a longitudinal air outlet 40. Multiple jet outlet components 5 are arranged longitudinally on the longitudinal duct member 4.

[0041] See also Figures 2 to 5 The annular wind box 34 extends circumferentially along the tunnel, and the extension start ends 401 of the plurality of longitudinal air duct members 4 are all connected to the annular wind box 34. Furthermore, the plurality of longitudinal air duct members 4 and the annular wind box 34 can be fixedly connected to the top mold 21. The air guide elbow 33 is connected between the exhaust fan 32 and the annular wind box 34 and extends between the central space 102 and the operating space 103. The air guide elbow 33 can be a flexible pipe to accommodate the movement of the top mold 21.

[0042] In addition, if Figure 3 As shown, two central air outlet pieces 6 are located in the central space 102, and the central air outlets 60 on the two central air outlet pieces 6 are oriented toward the second side 109 along the longitudinal direction of the tunnel; the third central air outlet piece 6 extends downwardly from the central space 102 toward the lower space 101, and the central air outlet 60 of the central air outlet piece 6 is inclined toward the lower space 101.

[0043] See also Figure 6 and Figure 7 The jet air outlet component 5 includes a radial tube component 51 and a spherical air outlet component 52. The radial tube component 51 extends radially along the tunnel, and the extended starting end of the radial tube component 51 is connected to the longitudinal air duct component 4; the radial tube component 51 includes a tube component 511 and a retaining ring component 512 connected along its own extension direction. The retaining ring component 512 is located at the extended end of the radial tube component 51. The tube component 511 and the retaining ring component 512 are locked by bolts and nuts. A ball socket mounting position 510 is formed between the tube component 511 and the retaining ring component 512. The jet air outlet 520 is formed on the spherical air outlet component 52, and the spherical air outlet component 52 is movably mounted on the ball socket mounting position 510.

[0044] Therefore, the spherical air outlet 52 can swing in all directions, and the air outlet direction of the jet air outlet 520 has greater freedom of adjustment. When it is necessary to enhance the return air effect, the air outlet direction of the jet air outlet 520 can be adjusted to be as close as possible to the longitudinal direction of the tunnel and toward the second side 109; when it is necessary to improve the air quality of the operating space 103, the air outlet direction of the jet air outlet 520 can be adjusted to be as close as possible to the radial direction of the tunnel. Moreover, since each spherical air outlet 52 can be adjusted independently, each construction worker can find one or more spherical air outlets 52 closest to him or her and adjust them according to his or her needs, thereby providing each construction worker with a safer and more comfortable working environment. In addition, since the ball socket mounting position 510 is formed between the tube component 511 and the retaining ring component 512, the tightness of the spherical air outlet 52 can also be adjusted by adjusting the bolts and nuts between the tube component 511 and the retaining ring component 51.

[0045] See also Figure 8 The ventilation and heat dissipation duct device also includes a sealing mechanism 61 disposed at the central air outlet 60. The sealing mechanism 61 includes a cover 611 and a sealing member 612 fixed to the inner side of the cover 611. The sealing member 612 is a rubber disc. The cover 611 has a hinged end 611a and a locking end 611b on opposite sides. The hinged end 611a is hinged to the central air outlet 6 at the axis 600. The sealing mechanism 61 can swing along the axis 600 between a blocking position that blocks the central air outlet 60 and a release position that releases the blockage of the central air outlet 60. When the sealing mechanism 61 reaches the blocking position, the locking end 611b can be locked to the central air outlet 6 via a latch. At this time, the sealing member 612 is in sealing contact with the periphery of the central air outlet 60 on the central air outlet 6. While achieving decentralized blowing of the arch operating space 103, setting up the central air outlet 60 can also form airflow in the central space 102 of the trolley and effectively increase the return air speed of the tunnel, and further enhance the integrity of the polluted air return effect. The central air outlet 60 can be optionally opened when the return air speed in the measured trolley area is slow. When the return air speed in the measured trolley area meets the requirements, the central air outlet 60 can be optionally blocked to enhance the blowing effect of the arch operating space 103 to further improve the working environment quality of the construction personnel.

[0046] In addition, although the existing tunnel secondary lining construction trolleys are equipped with fresh air ducts and blowers to input fresh air into the tunnel in consideration of tunnel ventilation issues, and further, considering the problem of dust reduction at the face, some tunnel secondary lining construction trolleys are also equipped with spray devices arranged along the tunnel circumference. Although these tunnel secondary lining construction trolleys have made improvements to the air quality problem in the tunnel, none of these tunnel secondary lining construction trolleys have made further considerations from the technical issues of the trolley blocking the return of polluted air and the working environment quality and environmental safety of the operating space on the trolley. Therefore, the present invention addresses the technical issues of the trolley blocking the return of polluted air and the working environment quality and environmental safety of the operating space on the trolley, and by adding a ventilation and heat dissipation duct device, it meets the working environment requirements of the construction personnel while meeting the tunnel return air speed requirements, effectively solving the construction ventilation and safety management problems of the tunnel secondary lining construction trolley blocking the return air, high temperature working environment, and accumulation of harmful gases.

[0047] In other embodiments, the plurality of longitudinal air duct members and the annular air boxes are fixedly connected to the portal frame via a supporting structure.

[0048] In other embodiments, the airflow delivered from the exhaust fan may be connected to each longitudinal duct member through a plurality of hoses.

[0049] In other embodiments, the ventilation and heat dissipation duct device does not include a local air outlet.

[0050] In other embodiments, the plurality of longitudinal duct members may be arranged only on two lateral sides of the operating space, or only above the operating space.

[0051] In other embodiments, the air outlet direction of the jet air outlet can be adjusted between the radial direction and the longitudinal direction of the tunnel.

[0052] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tunnel secondary lining construction trolley with ventilation and heat dissipation duct device, including a portal frame, top formwork, side formwork and air intake system; The door frame includes a column, a middle crossbeam and a top crossbeam, wherein the middle crossbeam and the top crossbeam are connected between the two columns, and the top crossbeam is located above the middle crossbeam; The side molds are connected to the columns, and the top molds are connected to the top crossbeams; A middle space is formed between the middle crossbeam and the top crossbeam, an operation space is formed between the top crossbeam and the top mold, and along the longitudinal direction of the tunnel, the portal has a first side and a second side opposite to each other, and the middle space and the operation space both penetrate between the first side and the second side along the longitudinal direction of the tunnel; The air intake system includes a fresh air duct and a blower, and the fresh air duct passes through the middle space; Its characteristics are: The tunnel secondary lining construction trolley with ventilation and heat dissipation air duct device also includes a ventilation and heat dissipation air duct device; The ventilation and heat dissipation duct device comprises an air suction port component, an exhaust fan, a longitudinal air duct component and a jet air outlet component which are connected in sequence; The air suction port component is arranged on the first side; The longitudinal air duct member extends in the longitudinal direction, and a plurality of the longitudinal air duct members are arranged in the circumferential direction of the tunnel above the operating space and / or on both sides of the operating space; The extended end of the longitudinal air duct member is located on the second side, and the extended end is provided with a longitudinal air outlet; A plurality of the jet outlet components are arranged on the longitudinal air duct along the longitudinal direction, each having a jet outlet facing the operating space, and an outlet direction of the jet outlet adjustable between the radial direction of the tunnel and the longitudinal direction; The ventilation and heat dissipation air duct device also includes an air guide elbow and a middle air outlet piece; The exhaust fan, the longitudinal air duct member and the central air outlet member are connected in sequence, and the air guide elbow extends from the central space to the operating space; The middle air outlet is provided on the middle air outlet; At least one of the middle air outlet members is located in the middle space, and the middle air outlet on the middle air outlet member faces the second side; The ventilation and heat dissipation air duct device also includes a blocking mechanism; The blocking mechanism is provided at the middle air outlet, and the blocking mechanism can block the middle air outlet; The ventilation and heat dissipation duct device further comprises an annular wind box, the annular wind box being connected between the air guide elbow and the longitudinal duct member; The annular wind box extends along the annular direction, and the extending starting ends of the plurality of longitudinal air duct members are all connected to the annular wind box.

2. The tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device according to claim 1, characterized in that: A lower space is formed below the middle cross beam, and the lower space runs through between the first side and the second side along the longitudinal direction; At least another middle air outlet piece extends obliquely downward from the middle space toward the lower space, and the middle air outlet of the middle air outlet piece faces the lower space.

3. The tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device according to claim 1 or 2, characterized in that: The jet air outlet component includes a radial pipe component and a spherical air outlet component; The radial tube member is in communication with the longitudinal air duct member, and a ball-and-socket mounting position is formed in the radial tube member; The jet air outlet is formed on the spherical air outlet member, and the spherical air outlet member is movably installed on the ball and socket installation position.

4. The tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device according to claim 3 is characterized in that: The radial tube component includes a tube component and a retaining ring component connected along its own extending direction, and the ball and socket mounting position is formed between the tube component and the retaining ring component.

5. The tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device according to claim 1 or 2, characterized in that: The exhaust fan is fixedly disposed in the middle space. In the longitudinal direction, the exhaust fan is close to the first side and away from the second side.

6. The tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device according to claim 1 or 2, characterized in that: Along the penetrating direction of the air suction port component, the opposite ends of the air suction port component are respectively an inlet end and an outlet end, the outlet end is connected to the exhaust fan, and the outer diameter of the inlet end is greater than the outer diameter of the outlet end.

7. The tunnel secondary lining construction trolley with a ventilation and heat dissipation air duct device according to claim 1 or 2, characterized in that: A plurality of longitudinal air duct members are fixedly connected to the top mold.

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