Tunnel smoke exhaust device

Abstract

The utility model provides a tunnel smoke exhaust device which comprises a jet fan, four straight threaded cylinders are installed on the outer surface of the jet fan, studs are connected into the straight threaded cylinders in a threaded mode, a top seat is rotatably installed at the upper ends of the studs, two fixing holes used for installing expansion screws are formed in the upper surface of the top seat, and the two fixing holes are connected with the straight threaded cylinders in a threaded mode. Two L-shaped plates are installed on the outer surface of the top base, penetrating holes are formed in the upper surfaces of the horizontal parts of the L-shaped plates, a column rod located between the two fixing holes is arranged on the upper side of the top base, screws are installed at the two ends of the column rod, the lower ends of the screws penetrate through the penetrating holes, and two nuts are in threaded connection with one screw. Two nuts on one screw are arranged on the upper side and the lower side of the penetrating hole respectively, and the top seat has the advantages that three-point supporting is formed between the top seat and the tunnel top walls with different radians on the same vertical plane, and installation stability is improved.

Description

Technical Field

[0001] This utility model is a tunnel smoke exhaust device, belonging to the field of tunnel facilities. Background Technology

[0002] When a fire breaks out in a tunnel, it produces a large amount of high-temperature, toxic smoke. This smoke quickly fills the entire tunnel space, hindering personnel evacuation and fire rescue, and may also trigger secondary disasters such as explosions, posing a serious threat to personnel safety and the tunnel structure. An effective smoke extraction system can remove smoke in a timely manner, creating favorable conditions for personnel evacuation and fire rescue, and reducing fire losses. Forcibly expelling smoke from the tunnel by installing equipment such as smoke extraction fans is a common method for tunnel smoke extraction. Jet fans spray high-speed airflow, forming a powerful jet at the fan outlet. The entrainment effect of this jet drives the surrounding airflow, thereby achieving ventilation. In tunnels, jet fans are usually installed at the tunnel ceiling. Since the tunnel ceiling is arc-shaped, when using expansion bolts to install the jet fan's mounting bracket at the tunnel ceiling, the fixed size of the bracket and the large space between the bracket and the tunnel ceiling result in a small contact area between the bracket and the tunnel ceiling, affecting the stability of the installation. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a tunnel smoke exhaust device to solve the problems mentioned in the background technology. This utility model forms a three-point support between the top seat and the tunnel top wall with different curvatures on a vertical plane, thereby improving the stability of the installation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a tunnel smoke extraction device, comprising a jet fan, four straight threaded cylinders mounted on the outer surface of the jet fan, studs internally connected to the straight threaded cylinders, a top seat rotatably mounted on the upper end of each stud, two fixing holes for mounting expansion bolts on the upper surface of the top seat, two L-shaped plates mounted on the outer surface of the top seat, through holes on the upper horizontal portion of each L-shaped plate, a column rod positioned between the two fixing holes on the upper side of the top seat, screw rods mounted at both ends of the column rod, the lower end of each screw rod penetrating the through hole, two nuts threadedly connected to one screw rod, and the two nuts on one screw rod being respectively positioned above and below the through hole.

[0005] Furthermore, a support lug is provided on the upper side of the perforation, one end of the support lug is connected and fixed to the L-shaped plate, and a through hole is opened on the upper surface of the support lug that is aligned with the perforation. The screw passes through the through hole, the support lug is arranged parallel to the horizontal part of the L-shaped plate, and there is a gap between the support lug and the horizontal part of the L-shaped plate. The support lug and the horizontal part of the connected L-shaped plate are located between two nuts on a screw.

[0006] Furthermore, threaded blind holes are provided at both ends of the column rod, and one end of the screw rod is installed in the blind hole.

[0007] Furthermore, a ball head is fixedly connected to one end of the stud near the top seat, and a ball groove is formed on the lower surface of the top seat, with the ball head rollingly installed in the ball groove.

[0008] Furthermore, the ball head and the stud are integrally formed, and the surface of the stud is machined with two symmetrically arranged flat surfaces for engaging the wrench.

[0009] Furthermore, the air inlet end of the jet fan is equipped with a horn cover, and a motor base is provided inside the horn cover. Multiple support plates are installed in a ring at equal intervals on the outer surface of the motor base, and the end of the support plate away from the motor base is connected and fixed to the horn cover.

[0010] Furthermore, the end of the horn cover away from the jet fan is provided with multiple connecting ears in a ring at equal intervals, and the connecting ears and the horn cover are integrally formed.

[0011] The beneficial effects of this utility model are:

[0012] 1. Adjust the relative position of the stud and the straight threaded cylinder. At this time, the distance between the top seat and the jet fan changes, which makes it easier to adjust the position of the top seat according to the relative position of the jet fan and the arc-shaped top of the tunnel. At the same time, the stud and the top seat form a rolling connection, which makes it easier to adjust the relative position between the top seat and the arc-shaped top of the tunnel. After installing the top seat on the top of the tunnel with expansion bolts, the installation of the jet fan is completed.

[0013] 2. After installing the top seat on the curved top of the tunnel using two expansion bolts, adjust the position of the screw rod along the through hole so that the column rod contacts the curved top of the tunnel. Then, use the nut to restrict the relative position of the screw rod and the L-shaped plate. Thus, the column rod and the expansion bolts in the two fixing holes form a three-point support structure, which improves the stability of the top seat installation. Because the surface of the column rod is curved, the relative position of the column rod and the top seat can be adjusted, so it is suitable for the needs of different top curvatures of tunnels.

[0014] 3. Position the lug and the corresponding L-shaped plate between two nuts on a screw. When the screw and nuts need to be disassembled and replaced due to corrosion and cannot be separated normally, cut the screw by using the gap between the lug and the horizontal part of the L-shaped plate. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a tunnel smoke exhaust device according to the present invention;

[0017] Figure 2 This is another perspective view of a tunnel smoke exhaust device according to the present invention;

[0018] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 4 This is a schematic diagram of the assembly of the L-shaped plate, the support lug, and the top seat in a tunnel smoke exhaust device according to this utility model.

[0020] Figure 5 This is a schematic diagram of the assembly of the stud and the straight threaded cylinder in a tunnel smoke exhaust device according to the present invention;

[0021] In the diagram: 1-Jet fan, 2-Column rod, 3-Top seat, 4-Bell cover, 5-Stud, 6-Straight threaded cylinder, 7-Fixing hole, 8-Motor base, 9-Support arm plate, 10-Connecting ear, 11-Support ear, 12-L-shaped plate, 13-Screw rod, 14-Nut, 15-Through hole, 16-Through hole, 17-Ball head, 18-Flat surface. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1-5 This utility model provides a technical solution: a tunnel smoke exhaust device, including a jet fan 1, four straight threaded cylinders 6 installed on the outer surface of the jet fan 1, studs 5 connected to the inner threads of the straight threaded cylinders 6, a top seat 3 rotatably mounted on the upper end of the stud 5, two fixing holes 7 for installing expansion bolts on the upper surface of the top seat 3, wherein a ball head 17 integrally formed with the stud 5 is connected and fixed to the end of the stud 5 near the top seat 3, and a ball groove is formed on the lower surface of the top seat 3 so that the ball head 17 rolls and is installed in the ball groove, completing the rotation of the stud 5 and the top seat 3. The stud 5 has two symmetrically arranged flat surfaces 18 for engaging the wrench. By adjusting the relative position of the stud 5 and the straight threaded cylinder 6, the distance between the top seat 3 and the jet fan 1 changes. This allows the position of the top seat 3 to be adjusted according to the relative position of the jet fan 1 and the arc-shaped top of the tunnel. At the same time, the stud 5 and the top seat 3 form a rolling connection, which facilitates the adjustment of the relative position between the top seat 3 and the arc-shaped top of the tunnel. After the top seat 3 is installed on the top of the tunnel using expansion bolts, the installation of the jet fan 1 is completed.

[0024] See Figures 1-4Two L-shaped plates 12 are installed on the outer surface of the top seat 3. A through hole 15 is provided on the upper horizontal surface of the L-shaped plate 12. A column rod 2 is located between two fixing holes 7 on the upper side of the top seat 3. Screws 13 are installed at both ends of the column rod 2, and threaded blind holes are provided at both ends of the column rod 2. One end of the screw rod 13 is threaded into the threaded blind hole, completing the assembly of the screw rod 13 and the column rod 2. The lower end of the screw rod 13 passes through the through hole 15, and two nuts 14 are threaded onto one screw rod 13. At this time, the two nuts 14 on one screw rod 13 are respectively... The top seat 3 is installed on the upper and lower sides of the perforation 15. After the top seat 3 is installed on the curved top of the tunnel using two expansion bolts, the position of the screw 13 is adjusted along the perforation 15 so that the column 2 contacts the curved top of the tunnel. Then, the nut 14 is used to limit the relative position of the screw 13 and the L-shaped plate 12. Thus, the column 2 and the expansion bolts in the two fixing holes 7 form a three-point support structure, which improves the stability of the installation of the top seat 3. Since the surface of the column 2 is curved, the relative position of the column 2 and the top seat 3 can be adjusted, so it is suitable for the needs of different top curvatures of tunnels.

[0025] See Figures 1-4 A lug 11 is provided on the upper side of the perforation 15. One end of the lug 11 is connected and fixed to the L-shaped plate 12. A through hole 16 is provided on the upper surface of the lug 11, which is aligned with the perforation 15. The screw 13 passes through the through hole 16. The lug 11 and the horizontal part of the L-shaped plate 12 are arranged parallel to each other. There is a gap between the lug 11 and the horizontal part of the L-shaped plate 12. The lug 11 and the horizontal part of the connected L-shaped plate 12 are set between two nuts 14 on the screw 13. When the screw 13 and the nuts 14 need to be disassembled and replaced due to corrosion and cannot be separated normally, the screw 13 can be cut off by using the gap between the lug 11 and the horizontal part of the L-shaped plate 12.

[0026] See Figure 1 and Figure 2 The air inlet end of the jet fan 1 is equipped with a horn cover 4. Inside the horn cover 4 is a motor base 8. Multiple support plates 9 are installed in a ring at equal intervals on the outer surface of the motor base 8. The end of the support plate 9 away from the motor base 8 is connected and fixed to the horn cover 4. Multiple connecting ears 10 are installed in a ring at equal intervals on the end of the horn cover 4 away from the jet fan 1. The connecting ears 10 and the horn cover 4 are integrally formed. The protective net cover and the connecting ears 10 are connected by bolts, which facilitates the installation of the protective net cover at one end of the horn cover 4 and serves to protect the motor in the jet fan 1.

[0027] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tunnel smoke extraction device, comprising a jet fan, characterized in that: The outer surface of the jet fan is equipped with four straight threaded cylinders. Each straight threaded cylinder is internally threaded with a stud. A top seat is rotatably mounted on the upper end of each stud. The upper surface of the top seat has two fixing holes for installing expansion bolts. The outer surface of the top seat is equipped with two L-shaped plates. The upper surface of the horizontal part of each L-shaped plate has a through hole. A column rod is located on the upper side of the top seat between the two fixing holes. Both ends of the column rod are equipped with screws. The lower end of the screw rod passes through the through hole. Two nuts are threaded onto one screw rod. The two nuts on one screw rod are respectively located on the upper side and the lower side of the through hole.

2. A tunnel smoke extraction device according to claim 1, characterized in that: The upper side of the perforation is provided with a lug, one end of which is connected and fixed to the L-shaped plate. The upper surface of the lug is provided with a through hole that is aligned with the perforation. The screw passes through the through hole. The lug is arranged parallel to the horizontal part of the L-shaped plate. There is a gap between the lug and the horizontal part of the L-shaped plate. The lug and the horizontal part of the connected L-shaped plate are located between two nuts on a screw.

3. A tunnel smoke extraction device according to claim 2, characterized in that: Both ends of the column are provided with threaded blind holes, and one end of the screw is installed in the blind hole.

4. A tunnel smoke extraction device according to claim 3, characterized in that: A ball head is fixed to one end of the stud near the top seat. A ball groove is machined on the lower surface of the top seat, and the ball head is rolled and installed in the ball groove.

5. A tunnel smoke extraction device according to claim 4, characterized in that: The ball head and stud are integrally formed, and the surface of the stud is machined with two symmetrically arranged flat surfaces for engaging the wrench.

6. A tunnel smoke extraction device according to claim 5, characterized in that: The air inlet end of the jet fan is equipped with a horn cover, and a motor base is provided inside the horn cover. Multiple support plates are installed in a ring at equal intervals on the outer surface of the motor base. The end of the support plate away from the motor base is connected and fixed to the horn cover.

7. A tunnel smoke extraction device according to claim 6, characterized in that: The end of the horn cover away from the jet fan is equipped with multiple connecting ears in a ring at equal intervals, and the connecting ears and the horn cover are integrally formed.

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