Tunnel jet fan

Abstract

The utility model discloses a tunnel jet fan which comprises a silencer, an inner container is arranged in the silencer, fan blades are installed in the inner container, silencing cotton is filled between the inner container and the silencer, the section of the silencer is hexagonal, the silencer comprises a first plane, a second plane and a third plane, and the adjacent first plane and the third plane are connected through the second plane. The distance from the first plane to the inner container surface is smaller than that from the second plane to the inner container surface. The silencer is arranged to be hexagonal, the thickness of the silencing cotton filled on the left side and the right side of the inner container is increased to reduce noise generated when the jet fans are arranged in parallel, and therefore the overall noise of a tunnel can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation equipment, and more specifically, to a tunnel jet fan. Background Art

[0002] Jet fans are widely used in highway tunnel ventilation systems due to their simple structure, flexible layout and easy control. Jet fans are fixed on the top of the tunnel. Figure 1 The figure shows a cross-sectional view of a jet fan currently used in tunnels. The jet fan includes a circular muffler 100 and a circular inner liner 200. A fan blade 300 is installed in the inner liner 200. Sound-absorbing cotton 400 is filled between the muffler 100 and the inner liner 200. The jet fans in the tunnel are generally arranged in pairs in parallel. The jet fans will generate relatively large noise when working, and the space between the two parallel jet fans will be affected by the two jet fans, and their noise will be superimposed to cause greater noise, thereby increasing the noise in the entire tunnel. Moreover, since the tunnel is a relatively closed environment, if the noise in the tunnel is too loud, it will cause discomfort to people in the tunnel, thereby increasing safety hazards. Therefore, it is urgently needed to improve this. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a tunnel jet fan, in which the muffler is arranged in a hexagon and the thickness of the muffler cotton filled on the left and right sides of the inner tank is increased to reduce the noise generated when the jet fans are arranged in parallel, thereby facilitating reducing the overall noise of the tunnel.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a tunnel jet fan, comprising a muffler, an inner shell is arranged inside the muffler, fan blades are installed inside the inner shell, and sound-absorbing cotton is filled between the inner shell and the muffler. The utility model is characterized in that the cross-section of the muffler is hexagonal, the muffler comprises a first plane, a second plane and a third plane, the adjacent first plane and the third plane are connected by the second plane, and the distance from the first plane to the surface of the inner shell is less than the distance from the second plane to the surface of the inner shell.

[0006] Furthermore, two ends of the inner tank are connected with connecting sleeves, and the connecting sleeves are connected to two ends of the muffler.

[0007] Furthermore, first annular ribs are provided at both ends of the inner liner, and second annular ribs are provided at one end of the connecting sleeve, and the first annular ribs and the second annular ribs are staggered.

[0008] Furthermore, the inner container includes a plurality of through holes.

[0009] Furthermore, a shield is connected to the end of the muffler.

[0010] Furthermore, the distance from the first plane to the surface of the inner liner is seventy millimeters, which is smaller than the distance from the second plane to the surface of the inner liner, which is two hundred millimeters.

[0011] Furthermore, the inner liner is a porous sound-absorbing plate.

[0012] Furthermore, the muffler is made of galvanized steel plate.

[0013] Furthermore, the area of ​​the first plane is smaller than the area of ​​the second plane.

[0014] The beneficial effects of the utility model are:

[0015] The distance from the first plane to the surface of the inner liner is smaller than the distance from the second plane to the surface of the inner liner, and the area of ​​the first plane is smaller than the area of ​​the second plane. Through this design, the amount of silencing cotton filled on the left and right sides of the inner liner is greater than the amount filled on the upper and lower sides of the inner liner, so that the silencing effect on the left and right sides of the utility model (jet fan) is better. When two jet fans are arranged in parallel, the noise between the jet fans arranged in parallel can be effectively reduced, which is beneficial to reducing the overall noise of the tunnel. In addition, the upper part of the muffler is made into the first plane. Compared with the circular muffler, the installation height of the utility model can be higher, thereby increasing the safe distance between the utility model and the tunnel road surface, and greatly reducing the probability of collision with the jet fan during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the prior art;

[0017] Figure 2 A structural schematic diagram of this embodiment;

[0018] Figure 3 It is a cross-sectional view of the main view of this embodiment;

[0019] Figure 4 is a cross-sectional view of the side view of this embodiment;

[0020] Figure 5 for Figure 4 A magnified view at point A;

[0021] Figure 6 It is a comparison diagram between a circular muffler and the muffler of the utility model.

[0022] Figure numerals: 1, muffler; 11, first plane; 12, second plane; 13, third plane; 2, liner; 21, through hole; 22, first annular rib; 3, fan blade; 4, silencer cotton; 5, connecting sleeve; 51, second annular rib; 6, shield. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figures 2 to 5 As shown, a tunnel jet fan comprises a muffler 1, wherein an inner liner 2 is arranged inside the muffler 1, a fan blade 3 is installed inside the inner liner 2, a sound-absorbing cotton 4 is filled between the inner liner 2 and the muffler 1, the inner liner 2 comprises a plurality of through holes 21, the inner liner 2 is a porous sound-absorbing plate, the muffler 1 is a galvanized steel plate, the cross section of the muffler 1 is a hexagon, the muffler 1 comprises a first plane 11, a second plane 12 and a third plane 13, the adjacent first plane 11 and the third plane 13 are connected by the second plane 12, the distance from the first plane 11 to the surface of the inner liner 2 is less than the distance from the second plane 12 to the surface of the inner liner 2, the area of ​​the first plane 11 is less than the area of ​​the second plane 12, and through this design, the sound-absorbing cotton 4 is The amount of filling on the left and right sides of the inner liner 2 is greater than the amount of filling on the upper and lower sides of the inner liner 2, so that the silencer effect on the left and right sides of the utility model (jet fan) is better. When two jet fans are arranged in parallel, the thickness of the silencer cotton 4 filled on the left and right sides of the inner liner 2 is increased to reduce the thickness of the silencer cotton 4 filled on the upper and lower sides of the inner liner 2. The noise generated when the jet fans are arranged in parallel can effectively reduce the noise between the jet fans arranged in parallel, which is beneficial to reducing the overall noise of the tunnel. In addition, the upper part of the muffler 1 is made into a first plane 11. Compared with the circular muffler, the installation height of the utility model can be higher, thereby increasing the safe distance between the utility model and the tunnel road surface, and greatly reducing the probability of collision with the jet fan during driving.

[0025] The two ends of the inner liner 2 are connected with connecting sleeves 5, and the connecting sleeves 5 are connected to the two ends of the muffler 1. Specifically, the two ends of the inner liner 2 are provided with first annular ribs 22, and one end of the connecting sleeve 5 is provided with second annular ribs 51. The first annular ribs 22 and the second annular ribs 51 are staggered and matched, and the connecting sleeve 5 is fixed to the muffler 1. The inner liner 2 can be fixed by the cooperation of the first annular ribs 22 and the second annular ribs 51.

[0026] The end of the muffler 1 is connected with a shield 6. By providing the shield 6, the safety protection effect of the utility model can be improved.

[0027] The distance between the first plane 11 and the surface of the inner liner 2 is 70 mm, which is less than the distance between the second plane 12 and the surface of the inner liner 2 is 200 mm. Figure 6 As shown, Figure 6 The dimensions are in millimeters. Figure 6 The muffler 1 in c is hexagonal. Figure 6 The muffler 1 in d is circular in the prior art;

[0028] use Figure 6 The filling area of ​​the silencer cotton 4 required for the c shape is:

[0029] S=[(0.4+0.74)×0.325÷2]×2

[0030] +0.35×0.74

[0031] -3.14×0.3 2

[0032] =0.3469m 2

[0033] use Figure 6 The filling area of ​​the silencer cotton 4 required for the d shape is:

[0034] S=3.14×0.5 2 -3.14×0.3 2

[0035] =0.785-0.2826

[0036] =0.5024m 2

[0037] It can be seen that by designing the silencer 1 into a hexagonal shape and filling the silencer cotton 4 unevenly, the filling area of ​​the silencer cotton 4 inside can not only effectively reduce the noise generated when the jet fans work in parallel, but also effectively reduce the use area of ​​the silencer cotton 4 compared with the silencer 1 with a circular wall of uniform thickness.

[0038] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A tunnel jet fan, comprising a muffler (1), wherein an inner liner (2) is provided inside the muffler (1), a fan blade (3) is installed inside the inner liner (2), and a sound-absorbing cotton (4) is filled between the inner liner (2) and the muffler (1), characterized in that: The muffler (1) has a hexagonal cross-section, and comprises a first plane (11), a second plane (12) and a third plane (13), wherein adjacent first planes (11) and third planes (13) are connected via the second plane (12), and the distance from the first plane (11) to the surface of the inner tank (2) is smaller than the distance from the second plane (12) to the surface of the inner tank (2).

2. A tunnel jet fan according to claim 1, characterized in that: The two ends of the inner tank (2) are connected with connecting sleeves (5), and the connecting sleeves (5) are connected to the two ends of the muffler (1).

3. A tunnel jet fan according to claim 2, characterized in that: The two ends of the inner container (2) are provided with first annular ribs (22), one end of the connecting sleeve (5) is provided with second annular ribs (51), and the first annular ribs (22) and the second annular ribs (51) are staggered and matched.

4. The tunnel jet fan according to claim 1, characterized in that: The inner container (2) comprises a plurality of through holes (21).

5. The tunnel jet fan according to claim 1, characterized in that: The end of the muffler (1) is connected to a baffle (6).

6. The tunnel jet fan according to claim 1, characterized in that: The distance between the first plane (11) and the surface of the inner container (2) is seventy millimeters, which is smaller than the distance between the second plane (12) and the surface of the inner container (2) which is two hundred millimeters.

7. The tunnel jet fan according to claim 1, characterized in that: The inner container (2) is a porous sound-absorbing plate.

8. The tunnel jet fan according to claim 1, characterized in that: The muffler (1) is made of galvanized steel plate.

9. The tunnel jet fan according to claim 1, characterized in that: The area of ​​the first plane (11) is smaller than the area of ​​the second plane (12).

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