CN110821545A - A self-silencing axial-flow fan ventilation system for tunnels - Google Patents

Abstract

The invention discloses a self-silencing axial flow fan ventilation system for a tunnel, and belongs to the technical field of tunnel ventilation equipment. The tunnel type air conditioner comprises a fan room, an air outlet channel and ventilation equipment, wherein an air inlet communicated with the tunnel is formed in one side of the fan room, and the air outlet channel vertically communicated with the ground is formed in the other side of the fan room; the ventilation equipment comprises an air valve, a silencing current collector, an axial flow fan and a silencing diffuser; the structure of the silencing current collector and the silencing diffuser are the same, and the silencing current collector and the silencing diffuser are composed of a horn-shaped shell, an adherence silencing layer, a left vertical silencing sheet, a right vertical silencing sheet, a left horizontal silencing sheet and a right horizontal silencing sheet. The silencer, the current collector and the diffuser which are required to be combined before are replaced by adopting the silencing current collector and the silencing diffuser, so that the integral installation length of the ventilation system of the axial flow fan is shortened, the installation space of the ventilation system of the axial flow fan is reduced, the civil engineering workload of a fan room is reduced, and the integral manufacturing cost of the ventilation system is reduced.

Description

A self-silencing axial-flow fan ventilation system for tunnels

technical field

The invention relates to a ventilation system of a self-silencing axial-flow fan for tunnels, and belongs to the technical field of tunnel ventilation equipment.

Background technique

At present, the main ventilation method for long tunnels is the use of axial fans. The configuration of the axial fan ventilation system is arranged from the air inlet to the air outlet, followed by the air valve, muffler, collector, axial fan, diffuser, muffler and other components. It enters the axial flow fan through the current collector, diffuses through the diffuser, and is muffled and discharged through the second muffler. Among them, the structure of the collector and the diffuser are the same, both of which are horn-shaped structures, and the installation directions of the two are opposite. wind. This configuration occupies a large installation space, long system ventilation pipeline, large system ventilation resistance, high installed power of axial flow fan, complex equipment configuration, high procurement cost, and large amount of civil engineering.

In order to reduce the volume of the overall equipment and the amount of civil engineering, a self-silenced axial-flow fan ventilation system for tunnels is designed, which integrates the structure of the muffler and the diffuser, the muffler and the current collector, minus the volume occupied by the muffler.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: to provide a self-silencing axial-flow fan ventilation system for tunnels, which solves the problems that the current tunnel axial-flow fan ventilation system occupies a large volume, a large amount of civil work, and a high construction cost. .

The technical problem to be solved by this invention adopts the following technical solutions to realize:

A self-silencing axial-flow fan ventilation system for tunnels, which includes a fan room, an air outlet channel, and ventilation equipment. One side of the fan room is provided with an air inlet that communicates with the tunnel, and the other side of the fan room is provided with a vertical fan. Air outlet channel connected to the ground;

The ventilation equipment includes a damper, a muffler collector, an axial flow fan, and a muffler diffuser;

The air inlet end of the air valve is connected with the air inlet of the fan room, and the air outlet end of the air valve is connected with the air inlet end of the muffler collector;

The outlet end of the muffler collector is connected to the air inlet end of the axial flow fan through a flexible connection;

The air outlet end of the axial flow fan is connected with the air inlet end of the muffler diffuser through a flexible connection;

The air outlet end of the muffler diffuser is connected with the bottom opening of the air outlet channel;

The muffler current collector and muffler diffuser have the same structure and are composed of a horn-shaped shell, a wall-mounted muffler layer, a left vertical muffler sheet, a right vertical muffler sheet, a left horizontal muffler sheet, and a right muffler sheet. The composition of the horizontal muffler;

The small mouth end of the trumpet-shaped shell is provided with a first connecting flange, the large-mouth end of the trumpet-shaped shell is provided with a second connecting flange, and the inner wall of the trumpet-shaped shell is fixed with a wall-adhering sound-absorbing layer;

A left vertical muffler sheet and a right vertical muffler sheet are vertically fixed in the horn-shaped shell. A right horizontal muffler is fixed between the middle part and the horn-shaped shell. The left vertical muffler, the right vertical muffler, the left horizontal muffler, and the right horizontal muffler divide the inner cavity of the horn-shaped shell into five parts. muffler channel;

The large port end of the muffler collector is the air inlet end, and the small port end of the muffler diffuser is the air inlet end;

The axial flow fan is fixed on the ground of the fan room through mounting brackets, and the small mouth ends of the muffler current collector and the muffler diffuser are respectively fixed on the ground at both ends of the axial flow fan through independent reinforcement brackets.

As a preferred example, the wall-mounted sound-absorbing layer is made of galvanized perforated plate sound-absorbing material.

As a preferred example, the left vertical muffler sheet, the right vertical muffler sheet, the left horizontal muffler sheet, and the right horizontal muffler sheet are all made of ultra-fine glass wool sound-absorbing material.

As a preferred example, the first connecting flange of the small mouth end of the trumpet-shaped shell adopts a circular flange, the second connecting flange of the large mouth end of the trumpet-shaped shell adopts a rectangular flange, and the trumpet-shaped shell smoothly transitions from the circular flange to the rectangular flange.

As a preferred example, the trumpet-shaped shell is formed by splicing two left and right half shells through a splicing flange in the middle.

As a preferred example, a ventilation chamber is provided on the top of the air outlet channel, a ventilation louver is provided on the side of the ventilation chamber, and a filter screen is provided on the inner side of the ventilation louver.

The beneficial effects of the present invention are:

(1) Adopt muffler collector and muffler diffuser to replace the muffler, current collector and diffuser that need to be used in combination before, shorten the overall installation length of the axial fan ventilation system, and reduce the axial fan ventilation system. The installation space reduces the civil work of the fan room and the overall cost of the ventilation system;

(2) The shortening of the installation length of the ventilation system also means that the air circulation path is shortened, which reduces the air flow resistance of the ventilation system. It can benefit from the cost of axial flow fan ventilation system, the amount of civil engineering, and the operating cost of the ventilation system.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of ventilation equipment;

Fig. 3 is the appearance structure schematic diagram of muffler current collector;

Fig. 4 is the appearance structure schematic diagram of muffler diffuser;

Fig. 5 is the structural schematic diagram of the small mouth end of the horn-shaped shell;

FIG. 6 is a schematic view of the structure of the large mouth end of the trumpet-shaped casing.

In the figure: fan room 1, air outlet channel 2, air valve 3, muffler collector 4, axial flow fan 5, muffler diffuser 6, flexible connection 7, trumpet shell 8, first connection flange 81, the second connecting flange 82, the wall-mounted muffler layer 9, the left vertical muffler sheet 10, the right vertical muffler sheet 11, the left horizontal muffler sheet 12, the right horizontal muffler sheet 13, the mounting bracket 14, Reinforcement bracket 15, splicing flange 16, ventilation chamber 17, ventilation shutter 18, air inlet 19.

Detailed ways

In order to easily understand the technical means, creation features, achievement goals and effects of the present invention, the present invention will be further described below with reference to the specific figures.

"Left" and "right" in the following expressions mean left and right when viewed from the small port end view of the flared case 8 .

As shown in Figures 1 to 6, a self-silenced axial fan ventilation system for tunnels includes a fan room 1, an air outlet channel 2, and ventilation equipment. One side of the fan room 1 is provided with an air inlet that communicates with the tunnel. 19. The other side of the fan room 1 is provided with an air outlet channel 2 that is vertically connected to the ground;

The ventilation equipment includes a damper 3, a muffler collector 4, an axial flow fan 5, and a muffler diffuser 6;

The air inlet end of the air valve 3 is connected to the air inlet 19 of the fan room 1, and the air outlet end of the air valve 2 is connected to the air inlet end of the muffler collector 4;

The air outlet end of the muffler collector 4 is connected to the air inlet end of the axial flow fan 5 through a soft connection 7;

The air outlet end of the axial flow fan 5 is connected to the air inlet end of the muffler diffuser 6 through a soft connection 7;

The air outlet end of the muffler diffuser 6 is connected to the bottom opening of the air outlet channel 2;

The muffler collector 4 and the muffler diffuser 6 have the same structure and are composed of a horn-shaped shell 8, a wall-mounted muffler layer 9, a left vertical muffler sheet 10, a right vertical muffler sheet 11, and a left horizontal muffler sheet. The sound sheet 12 and the right horizontal muffler sheet 13 are composed;

A first connecting flange 81 is provided at the small end of the trumpet-shaped housing 8, a second connecting flange 82 is provided at the large end of the trumpet-shaped housing 8, and a wall-adhering sound-absorbing layer 9 is fixed on the inner wall of the trumpet-shaped housing 8;

A left vertical muffler sheet 10 and a right vertical muffler sheet 11 are vertically fixed in the horn-shaped casing 8 , and a left horizontal muffler sheet 12 is fixed between the middle of the left vertical muffler sheet 10 and the horn-shaped casing 8 , a right horizontal muffler sheet 13 is fixed between the middle of the right vertical muffler sheet 11 and the horn-shaped housing 8, a left vertical muffler sheet 10, a right vertical muffler sheet 11, a left horizontal muffler sheet 12, a right muffler sheet The horizontal muffler sheet 13 divides the inner cavity of the horn-shaped shell 8 into five muffler channels;

The large port end of the muffler collector 4 is the air inlet end, and the small port end is the air outlet end; the small port end of the muffler diffuser 6 is the air inlet end, and the large port end is the air outlet end;

The axial fan 5 is fixed on the ground of the fan room 1 through the mounting brackets 14 , and the small ports of the muffler collector 4 and the muffler diffuser 6 are respectively fixed on the ground at both ends of the axial fan 5 through independent reinforcement brackets 15 .

The wall-mounted sound-absorbing layer 9 is made of galvanized perforated plate sound-absorbing material. As a perforated plate resonance sound absorption structure, galvanized perforated plate has greater absorption near its structural resonance frequency.

The left vertical muffler sheet 10, the right vertical muffler sheet 11, the left horizontal muffler sheet 12, and the right horizontal muffler sheet 13 are all made of ultra-fine glass wool sound-absorbing material. Ultra-fine glass wool (also known as ultra-fine glass felt) as a sound-absorbing material has the advantages of light weight and good sound-absorbing effect. Under the action of viscous resistance and vibration and friction with the porous wall of ultra-fine glass wool, a considerable part of the sound wave energy is converted into heat energy and absorbed, so as to achieve a better noise reduction effect.

The first connecting flange 81 of the small port end of the horn-shaped shell 8 adopts a circular flange, and the second connecting flange 82 of the large port end of the trumpet-shaped shell adopts a rectangular flange, and the trumpet-shaped shell 8 smoothly transitions from the circular flange to the rectangular flange. flange.

The trumpet-shaped shell 8 is formed by splicing the left and right half shells through the splicing flange 16 in the middle. The horn-shaped shell 8 is formed by splicing two left and right half shells, and has a small volume before assembly, and can be moved and assembled more conveniently in the narrow tunnel fan room 1 .

The top of the air outlet channel 2 is provided with a ventilation chamber 17, the side of the ventilation chamber 17 is provided with a ventilation shutter 18, and the inner side of the ventilation shutter 18 is provided with a filter screen (not shown in the figure).

working principle:

The muffler collector 4 and the muffler diffuser 6 are used to replace the muffler, current collector and diffuser that needed to be used in combination before, shortening the overall installation length of the ventilation system of the axial flow fan 5 and reducing the ventilation system of the axial flow fan 5 The installation space is large, which reduces the civil construction workload of the fan room 1 and reduces the overall cost of the ventilation system;

The shortened installation length of the ventilation system also means that the air circulation path is shortened, which reduces the air flow resistance of the ventilation system, and the power distribution of the axial flow fan 5 can be correspondingly reduced, which reduces the overall cost and operating energy consumption of the ventilation system. The cost of the ventilation system of the flow fan 5, the amount of civil works, and the operation cost of the ventilation system can all benefit.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements all fall into the present invention within the scope of protection. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A self-silencing axial-flow fan ventilation system for tunnels, which includes a fan room, an air outlet channel, and ventilation equipment. One side of the fan room is provided with an air inlet that communicates with the tunnel, and the other side of the fan room is provided with an air inlet. The air outlet channel connected vertically with the ground is characterized by: The ventilation equipment includes a damper, a muffler collector, an axial flow fan, and a muffler diffuser; The air inlet end of the air valve is connected with the air inlet of the fan room, and the air outlet end of the air valve is connected with the air inlet end of the muffler collector; The outlet end of the muffler collector is connected to the air inlet end of the axial flow fan through a flexible connection; The air outlet end of the axial flow fan is connected with the air inlet end of the muffler diffuser through a flexible connection; The air outlet end of the muffler diffuser is connected with the bottom opening of the air outlet channel; The muffler current collector and muffler diffuser have the same structure and are composed of a horn-shaped shell, a wall-mounted muffler layer, a left vertical muffler sheet, a right vertical muffler sheet, a left horizontal muffler sheet, and a right muffler sheet. The composition of the horizontal muffler; The small mouth end of the trumpet-shaped shell is provided with a first connecting flange, the large-mouth end of the trumpet-shaped shell is provided with a second connecting flange, and the inner wall of the trumpet-shaped shell is fixed with a wall-adhering sound-absorbing layer; A left vertical muffler sheet and a right vertical muffler sheet are vertically fixed in the horn-shaped shell. A right horizontal muffler is fixed between the middle part and the horn-shaped shell. The left vertical muffler, the right vertical muffler, the left horizontal muffler, and the right horizontal muffler divide the inner cavity of the horn-shaped shell into five parts. muffler channel; The large port end of the muffler collector is the air inlet end, and the small port end of the muffler diffuser is the air inlet end; The axial flow fan is fixed on the ground of the fan room through mounting brackets, and the small mouth ends of the muffler current collector and the muffler diffuser are respectively fixed on the ground at both ends of the axial flow fan through independent reinforcement brackets. 2 . The self-silencing axial-flow fan ventilation system for tunnels according to claim 1 , wherein the wall-mounted sound-absorbing layer is made of galvanized perforated plate sound-absorbing material. 3 . 3. The self-silencing axial fan ventilation system for tunnels according to claim 1, wherein the left vertical muffler sheet, the right vertical muffler sheet, the left horizontal muffler sheet, the right horizontal muffler sheet The muffler sheet is made of ultra-fine glass wool sound-absorbing material. 4. The self-silencing axial-flow fan ventilation system for tunnels according to claim 1, wherein the first connecting flange at the small mouth end of the horn-shaped shell adopts a circular flange, and the horn-shaped shell has a large mouth. The second connecting flange of the end adopts a rectangular flange, and the flared shell smoothly transitions from a circular flange to a rectangular flange. 5 . The self-silencing axial flow fan ventilation system for tunnels according to claim 1 , wherein the horn-shaped shell is formed by splicing left and right half shells through a splicing flange in the middle. 6 . 6. The self-silencing axial flow fan ventilation system for tunnels according to claim 1, wherein a ventilation chamber is provided on the top of the air outlet channel, a ventilation shutter is provided on the side of the ventilation chamber, and a ventilation shutter is provided on the inner side. Filter.

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