Air circulation device for tunnel civil engineering

Abstract

The utility model relates to the technical field of air circulation devices, discloses an air circulation device for tunnel civil engineering, and aims to overcome the defects of the existing tunnel air circulation device in the aspects of portability, stability and practicability. The device comprises a bottom supporting mechanism and air circulation equipment installed on the bottom supporting mechanism, and the bottom supporting mechanism is of a flat car structure and comprises a car body frame, front wheels, a rear wheel frame and rear wheels, the hydraulic assembly is composed of a manual hydraulic pump and a secondary hydraulic telescopic rod and used for adjusting the angle of the rear wheel frame, so that the device is switched between the moving state and the using state. The air circulation equipment introduces air into the tunnel through the air guide pipe, and the air quality is improved. The device is compact in structure and convenient to operate, has efficient air circulation and high stability, is suitable for long-distance tunnel construction, and has remarkable practicability and popularization value.

Description

TECHNICAL FIELD

[0001] The utility model relates to air circulation device technical field, especially a kind of tunnel civil engineering air circulation device. BACKGROUND

[0002] Tunnel civil engineering is the basic link of tunnel construction, involves the design of tunnel, construction and related civil engineering structure, such as foundation, wall body, roof, etc. Among them, the wall body of tunnel usually adopts the structure form such as shotcrete or reinforced concrete, to ensure its stability and durability. In the process of tunnel construction, key processes such as excavation, lining, grouting are needed, which provides basic guarantee for subsequent equipment installation and normal operation of tunnel.

[0003] However, in the process of tunnel construction, the problem of poor air circulation is particularly prominent due to the relatively closed internal space of the tunnel. Especially in long distance tunnel construction, poor air circulation can lead to deterioration of the construction environment, affecting the health and work efficiency of workers, and even may cause safety hazards. Therefore, it is particularly important to effectively circulate the air inside the tunnel.

[0004] At present, the traditional tunnel air circulation device usually adopts fan as the core equipment. Although this kind of device can improve the air quality in the tunnel to some extent, it has obvious defects: first, the traditional fan device lacks flexibility and is difficult to quickly adjust the position according to the actual demand; second, the mobility of the device is poor, usually needs to rely on other equipment or manual handling, increases the construction cost and operation difficulty; finally, the existing device also has certain defects in stability, is easy to fall down due to uneven ground or external force, affects normal use. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of tunnel civil engineering air circulation device, to solve the deficiency of existing tunnel air circulation device in portability, stability and practicality.

[0006] The technical scheme adopted by the utility model is:

[0007] A kind of tunnel civil engineering air circulation device, the tunnel civil engineering air circulation device includes bottom support mechanism, and air circulation equipment installed on bottom support mechanism;The bottom support mechanism is flat car structure, it includes car body frame, front wheel installed on the front side of car body frame, and rear wheel frame and rear wheel installed on the rear side of car body frame by hydraulic assembly hinged;The air circulation equipment is fixedly installed on bottom support mechanism by mounting seat, it moves by bottom support mechanism, and its air outlet extends to tunnel by air guide pipe.

[0008] Further, the vehicle body frame of the bottom support mechanism has obtuse-angled sides, a horizontal frame parallel to the ground on the front side, and an upwardly inclined frame on the rear side; a mounting seat is fixedly arranged on the platform of the horizontal frame, and front wheels are rotatably arranged on both sides of the front end of the horizontal frame; a handle frame is fixedly arranged on the tail end of the upwardly inclined frame.

[0009] Further, the front side of the rear wheel frame is hingedly connected to the vehicle body frame at the joint of the horizontal frame and the upwardly inclined frame, and the rear side of the rear wheel frame is a shaft body on which a set of rear wheels are rotatably arranged.

[0010] Further, the hydraulic assembly comprises a manual hydraulic pump mounted on the upwardly inclined frame, and a secondary hydraulic telescopic rod capable of adjusting the swinging angle of the rear wheel frame relative to the vehicle body frame; the secondary hydraulic telescopic rod is rotatably arranged on the rear side of the upwardly inclined frame through a set of mounting rods, and the rod end of the secondary hydraulic telescopic rod is rotatably connected to the shaft body of the rear wheel frame through a set of pipe bearings; the manual hydraulic pump is connected to the secondary hydraulic telescopic rod through an oil circuit.

[0011] Further, front support blocks are fixedly arranged on both sides of the front end of the horizontal frame, and rear support blocks are fixedly arranged on both sides of the rear end of the upwardly inclined frame; when the rear wheel frame and the rear wheels are swung upward relative to the vehicle body frame through the hydraulic assembly, the front support blocks and the rear support blocks are in contact with the ground.

[0012] The beneficial effects of the utility model are:

[0013] 1. Efficient air circulation: the air circulation device of the tunnel civil engineering air circulation device can effectively introduce fresh air into the tunnel interior through the cooperation of the air outlet and the air duct, improve air quality, optimize the construction environment, and protect the health and work efficiency of workers.

[0014] 2. Strong structural stability: in the use state of the tunnel civil engineering air circulation device, the rear wheel frame and the rear wheels are swung upward through the hydraulic assembly, the front support blocks and the rear support blocks are in contact with the ground, a stable support is formed, the tunnel civil engineering air circulation device is prevented from falling down, and the stable and reliable operation of the equipment is ensured.

[0015] 3. High mobility: the tunnel civil engineering air circulation device adjusts the angle of the rear wheel frame through the manual hydraulic pump and the secondary hydraulic telescopic rod, and the device can quickly switch between the moving state and the stable state. When moving, the front and rear wheels are in contact with the ground, and the user can easily pull the device through the handle frame, which is simple and labor-saving.

[0016] 4. Wide application range: the tunnel civil engineering air circulation device can quickly adjust the position according to actual needs, adapt to different construction scenes, solve the problems of poor flexibility and inconvenient movement of traditional fan devices, and has high popularization value and practicality. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A three-dimensional structural diagram of the air circulation device in the tunnel civil engineering;

[0018] Figure 2 and Figure 3 A schematic diagram of the bottom structure of the tunnel civil engineering air circulation device;

[0019] Figure 4 A schematic diagram of the rear structure of the tunnel civil engineering air circulation device;

[0020] In the diagram: 1. Bottom support mechanism; 2. Air circulation equipment; 3. Vehicle frame; 4. Front wheel; 5. Hydraulic components; 6. Rear wheel frame; 7. Rear wheel; 8. Mounting seat; 9. Air duct; 10. Horizontal frame; 11. Upward frame; 12. Platform; 13. Handlebar bracket; 14. Shaft; 15. Manual hydraulic pump; 16. Two-stage hydraulic telescopic rod; 17. Mounting rod; 18. Sleeve bearing; 19. Front support block; 20. Rear support block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] To address the shortcomings of existing tunnel air circulation devices in terms of portability, stability, and practicality, this embodiment provides a tunnel civil engineering air circulation device. For example... Figure 1 As shown, the tunnel civil engineering air circulation device consists of two parts: a bottom support structure 1 and an air circulation device 2. The air circulation device 2 is a commercially available finished product, such as the EBM-PapstRadiCal series tunnel-specific ventilator. The air circulation device 2 uses an industrial-grade centrifugal fan with a power of 5.5kW, an air volume of up to 5000m³ / h, and an outlet diameter of 300mm. The outer shell of the device is made of galvanized steel plate, and the internal impeller is made of aluminum alloy, featuring lightweight and corrosion resistance. The outlet of the air circulation device 2 is connected to a guide duct 9, which is made of flexible PVC material. The length of the guide duct can be customized according to requirements, typically 10-20 meters, extending deep into the tunnel to ensure a wide air circulation coverage area.

[0023] like Figure 1 , Figure 2 and Figure 3As shown, the bottom support mechanism 1 in this embodiment is a flat car structure, mainly including a vehicle body frame 3, a front wheel 4, a rear wheel frame 6 and a rear wheel 7. Among them, the vehicle body frame 3 is welded by high-strength carbon steel material, the side is designed as an obtuse angle, the front side is a horizontal frame 10, and the rear side is an upward frame 11. The horizontal frame 10 is parallel to the ground, and a table plate 12 is arranged thereon, and a mounting seat 8 is fixedly arranged on the table plate 12 by bolts. The air circulation device 2 is connected between the mounting seat 8 and the mounting seat 8 by bolts, so that the air circulation device 2 is fixed on the table plate 12 of the horizontal frame 10, and is convenient for subsequent disassembly and maintenance. The upward frame 11 is inclined upward, the front side is welded with the horizontal frame 10, and the overall structural strength is ensured; the rear side is used to install a hydraulic assembly 5 and a handle frame 13. The front ends of the horizontal frame 10 are rotatably installed with the front wheels 4 through bearings, and the rear ends are rotatably installed with the rear wheel frames 6 through hinges. The front wheels 4 are made of wear-resistant rubber material, with a diameter of about 200mm, and have good rolling performance, which is suitable for complex ground environment in the tunnel. The rear wheel frame 6 is hinged with the upward frame 11, and the rear side of the rear wheel frame 6 is an axle body 14, and a group of rear wheels 7 are rotatably installed on the axle body 14. The rear wheels 7 are also made of wear-resistant rubber material, with the same diameter as the front wheels 4, to ensure the stability during movement.

[0024] Considering the position adjustment of the rear wheel frame 6 and the rear wheel 7, the hydraulic assembly 5 is installed at the rear side of the vehicle body frame 3 in this embodiment. The hydraulic assembly 5 includes a manual hydraulic pump 15 and a two-stage hydraulic telescopic rod 16; wherein the manual hydraulic pump 15 is a commercially available product, such as the Parker PFP series manual hydraulic pump, and the manual hydraulic pump 15 is installed in the middle of the upward frame 11, which is made of stainless steel shell and equipped with high-efficiency sealing elements inside, with strong corrosion resistance. The manual hydraulic pump 15 is connected with the two-stage hydraulic telescopic rod 16 through an oil circuit, which is simple to operate and does not require an external power source. The two-stage hydraulic telescopic rod 16 is also a commercially available product, such as the Parker HMI series two-stage hydraulic telescopic rod, and the two-stage hydraulic telescopic rod 16 is rotatably installed at the rear side of the upward frame 11 through a group of mounting rods 17, and the rod end is rotatably connected with the axle body 14 of the rear wheel frame 6 through a sleeve bearing 18; the two-stage hydraulic telescopic rod 16 can adjust the swing angle of the rear wheel frame 6 relative to the vehicle body frame 3, to realize the switching between the moving state and the use state of the device.

[0025] In addition, considering the moving convenience of the bottom support mechanism 1, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the tail end of the upward frame 11 in this embodiment is fixedly welded with a handle frame 13, and the bottom support mechanism 1 can be quickly pushed and pulled through the handle frame 13, so that the whole tunnel civil air circulation device can be quickly moved.

[0026] Further, as the preferred technical solution of the present embodiment, in order to prevent the tunnel civil air circulation device from moving by itself due to the ground flatness when in use, as shown in Figure 1 、 Figure 2 and Figure 3 , front support blocks 19 and rear support blocks 20 are respectively fixedly installed on both sides of the front end of the horizontal frame 10 and both sides of the rear end of the upward frame 11. The front support blocks 19 and the rear support blocks 20 are made of high-density polyurethane material and have compression resistance and wear resistance. When the tunnel civil air circulation device is in use, the front support blocks 19 and the rear support blocks 20 are in contact with the ground to provide stable support and prevent the device from moving by itself due to the contact of the wheels with the ground.

[0027] The tunnel civil air circulation device described above is used as follows:

[0028] Moving state: the user operates the manual hydraulic pump 15 to extend the secondary hydraulic telescopic rod 16, which pushes the rear wheel frame 6 to swing downward. At the same time, the rear wheel frame 6 swings downward, and the front support blocks 19 and the rear support blocks 20 are separated from the ground, and the front wheels 4 and the rear wheels 7 of the bottom support mechanism 1 are in contact with the ground. At this time, the device moves by relying on the front wheels 4 and the rear wheels 7, and the user easily moves the device to the target position by pulling the handle frame 13.

[0029] Use state: after reaching the designated position, operate the manual hydraulic pump 15 to retract the secondary hydraulic telescopic rod 16, pull the rear wheel frame 6 to swing upward, and the rear wheels 7 are separated from the ground. The front support blocks 19 and the rear support blocks 20 are in contact with the ground to form a stable support. At this time, the air circulation equipment 2 can be started to extend the air duct 9 to the deep part of the tunnel and start the air circulation work.

[0030] After the construction is completed, the air circulation equipment 2 is turned off, the air duct 9 is rolled up and fixed, and the manual hydraulic pump 15 is operated again to switch the device to the moving state, which is convenient for storage or transfer to the next construction point.

[0031] In summary, the tunnel civil air circulation device optimizes the bottom support mechanism 1, the hydraulic assembly 5, and the air circulation equipment 2 to significantly improve the portability, stability, and practicality of the device, which is suitable for air circulation requirements in tunnel civil construction.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tunnel civil engineering air circulation device, characterized in that: The tunnel civil engineering air circulation device includes a bottom support mechanism and an air circulation device installed on the bottom support mechanism. The bottom support mechanism is a flatbed vehicle structure, which includes a vehicle frame, front wheels installed on the front side of the vehicle frame, and a rear wheel frame and rear wheels hinged to the rear side of the vehicle frame via hydraulic components. The air circulation device is fixedly installed on the bottom support mechanism via a mounting base, moves through the bottom support mechanism, and its air outlet extends into the tunnel through a duct.

2. The tunnel civil engineering air circulation device according to claim 1, characterized in that: The vehicle frame of the bottom support mechanism has obtuse angles on its sides, a horizontal frame parallel to the ground at the front, and an upward-facing frame at the rear. Mounting seats are fixedly provided on the platform of the horizontal frame, and front wheels are rotatably mounted on both sides of the front end of the horizontal frame. A handlebar is fixedly installed at the rear end of the upward-facing frame.

3. The tunnel civil engineering air circulation device according to claim 2, characterized in that: The front side of the rear wheel frame is hinged to the vehicle body frame at the junction of the horizontal frame and the upward frame. The rear side of the rear wheel frame is an axle on which a set of rear wheels are rotatably mounted.

4. The tunnel civil engineering air circulation device according to claim 3, characterized in that: The hydraulic assembly includes a manual hydraulic pump mounted on the upper frame and a secondary hydraulic telescopic rod capable of adjusting the swing angle of the rear wheel frame relative to the vehicle frame. The secondary hydraulic telescopic rod is rotatably mounted on the rear side of the upper frame via a set of mounting rods, and the rod end of the secondary hydraulic telescopic rod is rotatably connected to the axle of the rear wheel frame via a set of tubular bearings. The manual hydraulic pump is connected to the secondary hydraulic telescopic rod via an oil circuit.

5. The tunnel civil engineering air circulation device according to claim 2, characterized in that: Front support blocks are fixedly installed on both sides of the front end of the horizontal frame, and rear support blocks are fixedly installed on both sides of the rear end of the upward frame; when the rear wheel frame and the rear wheel swing upward relative to the vehicle frame through the hydraulic components, the front support blocks and the rear support blocks contact the ground.

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