CN221195105U - Bellows and fan group - Google Patents

Abstract

The utility model discloses an air box and a fan group, wherein a cavity is formed in the air box and is used for assembling a fan, the air box is provided with an air inlet and an air outlet, the air box further comprises an air guide part, the air guide part is positioned at the air outlet of the air box, the air guide part is provided with a guide plate, the air guide part further comprises a side air plate and an air guide plate, and the guide plate is connected with the air guide plate. The utility model can guide the wind direction of the air flow by using the guide plate on the air guide plate, avoid forming vortex and turbulence after the air flow passes through the guide structure, and weaken wind force; meanwhile, an integral wind surface can be formed at the junction to block the air from flowing reversely.

Description

Bellows and fan group

Technical Field

The utility model relates to the technical field of fans, in particular to an air box and a fan group.

Background

Ventilation in a tunnel is an important measure for ensuring the air quality and safety in the tunnel construction and operation stages, fresh air needs to be injected into the tunnel in the tunnel construction stage to ensure the working conditions of staff, and the concentration of harmful gas or pollutants in the tunnel needs to be reduced through fresh air injection in the operation traffic stage.

The existing fans used for ventilation of the tunnel are divided into an axial flow fan, a centrifugal fan and the like, the tunnel adopts a direct ventilation mode of the fans, but the existing fans are easy to form backflow when conveyed into the tunnel in air, the whole ventilation requirement of the tunnel cannot be met, in order to solve the problem, high-power fans are usually used or the number of the fans is increased, and the method is high in cost.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art and provides an air box and an air machine group thereof.

The utility model solves the technical problems by adopting the following technical scheme:

the utility model provides a wind-box, the inside cavity that is formed with of wind-box is used for assembling the fan, the wind-box has air inlet and air outlet, still includes wind-guiding portion, wind-guiding portion is located the air outlet of wind-box, wind-guiding portion constructs the guide plate.

Preferably, the air guiding part further comprises a side air plate and an air guiding plate, and the air guiding plate is connected with the air guiding plate.

Preferably, the air guiding part further comprises a pressurizing plate, and the pressurizing plate and the air guiding plate are oppositely arranged.

Preferably, the wind deflector and the wind direction of the wind box air outlet are arranged at an angle, and the included angle is 8-15 degrees.

Preferably, the wind deflector is 12 degrees away from the wind direction of the wind outlet of the wind box.

Preferably, the wind box is internally provided with a wire placing groove at the position of the wind inlet or the wind outlet, and the notch is matched with the wire placing box of the fan in shape.

Preferably, the wire placing groove is further provided with a sealing plate, and the sealing plate is connected with the air box to seal the wire placing groove.

Preferably, the bellows further comprises a front rack and a rear rack, the front rack and the rear rack are respectively located at the air inlet and the air outlet of the bellows, and the front rack or the rear rack can seal the notch of the wire placing groove.

Preferably, the front rack and the rear rack are both provided with a storage opening, and the storage opening is used for placing a fan.

The fan group comprises a plurality of bellows and fans, and further comprises a bearing mechanism, wherein the bearing mechanism is connected with the bellows and is configured to maintain the shape of the fan mechanism.

The utility model has the advantages and positive effects that:

1. The utility model can guide the wind direction of the air flow by using the guide plate on the air guide plate, avoid forming vortex and turbulence after the air flow passes through the guide structure, and weaken wind force; meanwhile, an integral wind surface can be formed at the junction to block the air from flowing reversely.

2. The wire placing box moves in the wire placing groove to form preset positions, so that the fan and the air box are convenient to install on one hand, the whole size of the air box is smaller, the production cost is saved, and the follow-up construction and installation are convenient.

3. The utility model takes the tunnel as an integral ventilation pipeline to replace the traditional mode of adding soft wind bands to the axial flow fan, combines a plurality of fans of the fan group as a structural blowing unit, emits annular high-speed air curtain airflow along the inner wall of the tunnel, forms a low negative pressure area near the air pipe device, sucks a large amount of air outside the tunnel, can realize multiplication of ventilation quantity, and has lower energy consumption under the same ventilation condition.

Drawings

FIG. 1 is a schematic view of the present utility model installed on the inner wall of a tunnel;

FIG. 2 is an isometric view of the present utility model;

FIG. 3 is a schematic illustration of a portion of the mechanism of the present utility model and a corresponding enlarged view at A;

FIG. 4 is a schematic diagram of the assembly unit and the structure of the straight plate and the arc plate;

FIG. 5 is a schematic view of an assembled unit of the present utility model;

FIG. 6 is a schematic view of the structure of the bellows of the present utility model;

FIG. 7 is a cross-sectional view of FIG. 6 in accordance with the present utility model;

FIG. 8 is a schematic view of a bellows structure according to another embodiment of the present utility model;

fig. 9 is a cross-sectional view of fig. 8 in accordance with the present utility model.

In the figure: 100. a fan mechanism; 100a, a wire placing box; 100b, an assembly unit; 110. a wind box; 111. a wire placing slot; 112. a sealing plate; 113. a front rack; 114. a post-rest; 120. an air guide part; 121. an air deflector; 122. a side wind plate; 123. a deflector; 124. a pressurizing plate; 200. a carrying mechanism; 201. a connecting plate; 210. a first carrying part; 211. an arc-shaped plate; 220. a second carrying part; 221. a straight plate; 221a, assembly holes; 222. a through groove; 222a, protrusions; 223. buckling teeth; 223a, a notch; 300. the inner wall of the tunnel.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Embodiments of the utility model are described in further detail below with reference to the attached drawing figures:

As shown in fig. 1 and 2, the overall shape of a fan group is adapted to the shape of the tunnel inner wall 300, and in general, the upper side of the fan group approaches the tunnel inner wall 300, so that a high-speed air curtain air flow is emitted along the tunnel inner wall 300 based on the whole tunnel, a low-pressure negative pressure is formed near the fan group, and a large amount of air outside the tunnel is sucked, thereby increasing the overall air supply quantity of the tunnel.

The fan group comprises a fan mechanism 100, the fan mechanism 100 comprises a plurality of adjacent air boxes 110, the width of the upper side of each air box 110 is larger than the width of the lower side, each air box 110 is used for loading a fan, the fan mechanism 100 is integrally matched with the inner wall 300 of the annular tunnel and is integrally arranged in a nearly annular shape, in some embodiments, the fan mechanism 100 matched with the annular tunnel can also be integrally in a multi-section folded line shape, and the angle between the folded line sections is equal to or larger than 90 degrees; the fan mechanism 100 also comprises a bearing mechanism 200, and the bearing mechanism 200 is connected to the upper side of the fan mechanism 100.

Referring to fig. 3 and fig. 1, the carrying mechanism 200 includes a first carrying portion 210 and a second carrying portion 220, where the first carrying portion 210 is adapted to the shape of the tunnel inner wall 300, and the shape of the first carrying portion 210 is not required to be completely identical to the shape of the tunnel inner wall 300, for example, the annular tunnel inner wall 300 may be a first carrying portion 210 similar to an annular shape as a whole, or may be a multi-segment folded line structure as a whole, and an angle between the folded line segments is equal to or greater than 90 °; the second bearing part 220 is matched with the shape of the bellows 110, the second bearing part 220 is not matched with the whole shape of the bellows 110, but is matched with the shape of the connecting part of the bellows 110, for example, the connecting position of the bellows 110 is planar, and the connecting position of the second bearing part 220 can be planar, or can be arc-shaped or fold-line-shaped which can play a role in connection stability;

Referring to fig. 4, the first carrying portion 210 includes an arc plate 211, and in some embodiments, the arc plate 211 may also be a profiled plate, and the second carrying portion 220 includes a straight plate 221. The front side and the rear side of the bellows 110 are respectively connected with a group of combinations of an arc plate 211 and a straight plate 221, the sizes of the arc plate 211 and the straight plate 221 are close to those of a single fan, the upper side of the arc plate 211 is connected with the inner wall 300 of the tunnel, the lower side of the arc plate 211 is connected with the straight plate 221, and the straight plate 221 is connected with the bellows 110, or the straight plate 221 and the bellows 110 are integrally connected with the arc plate 211; in some embodiments, the front and rear curved plates 211 or the straight plates 221 are connected by a connecting plate 201.

That is, the blower mechanism 100 includes n unit bellows 110, the first bearing portion 210 includes n arcuate plates 211, the second bearing portion 220 includes n straight plates 221, the arcuate plates 211, the straight plates 221 and the unit bellows 110 located at the same position constitute one assembly unit 100b, and the blower group includes n assembly units 100b.

The arc-shaped plate 211 is matched with the tunnel inner wall 300, the straight plate 221 is connected with the end part of the arc-shaped plate 211 to form a stable connecting unit, and another stress unit except the tunnel inner wall 300 or separated from the tunnel inner wall 300 is formed, so that the bearing capacity of the tunnel inner wall 300 is reduced, the stability of the structure is ensured, and meanwhile, the assembly efficiency is improved; through the cooperation of a plurality of connecting units, the arc 211 is whole to form stable arch structure, also can support between the adjacent straight board 221, increases structural stability.

By adopting the group mode, on one hand, a plurality of fans are combined to form a fan group suitable for the inner wall 300 of the tunnel, and a high-speed air curtain airflow is formed by matching with the inner wall 300 of the tunnel, so that the ventilation efficiency is improved; on the other hand, the combined assembly unit 100b can adapt to different shapes of the tunnel inner wall 300 by changing the structure of the first bearing part 210, so that the suitability of the fan group is higher; in addition, the combined assembly unit 100b can complete more assembly steps in a factory, and the tunnel construction site can be assembled by only assembling the bearing mechanism 200 and the fan mechanism 100, so that the construction time on site is greatly reduced.

As shown in fig. 4, in the adjacent assembly units 100b, the ends of the arc-shaped plates 211 are in contact with each other, and thus the circular arc-shaped first bearing portion 210 is formed by connecting a plurality of adjacent arc-shaped plates 211; the end of the straight plate 221 is fixedly connected with the end of the arc plate in use, and welding is generally adopted, so that the structural stability of the straight plate 221 and the arc plate is ensured, further, the arc plate 211 is used as a structure for connecting the inner wall 300 of the tunnel to play a main supporting role, the straight plate 221 is connected with the end of the arc plate 211, and the connection positions of the straight plate 221 and the arc plate 211 of the adjacent assembly units 100b are abutted, so that good structural stability can be formed; the wall surfaces of the adjacent bellows 110 are in contact with each other, and bolt holes are formed in the adapting positions of the connected side plates, so that the adjacent bellows 110 are connected through bolts, and the adjacent assembling units 100b form a common stress surface of the side plates, the straight plates 221 and the arc plates 211 of the bellows 110.

As shown in fig. 5, the arc plate 211, the straight plate 221 and the bellows 110 are arranged up and down, the arc plate 211 is attached to the tunnel inner wall 300, 3 assembly holes 221a are arranged on the straight plate 221 along a straight line, 3 groups of threaded holes are arranged at the upper and lower corresponding positions of the straight plate 221 and the arc plate 211, and the straight plate 221 and the arc plate 211 can be connected through screws; further, the screws are connected and fixed with the tunnel inner wall 300 after passing through 3 sets of screw holes corresponding to the straight plate 221 and the arc plate 211. In the assembled state, the assembly hole 221a is blocked by the upper arc plate 211 and the lower bellows 110; one end of the straight plate 221 is provided with a through groove 222 penetrating up and down, and the other end is provided with a buckling tooth 223, and the buckling tooth 223 is buckled with the through groove 222 to realize the connection of the adjacent straight plates 221; in some embodiments, the fastened adjacent straight plates 221 may be welded and fixed; that is, after the assembly is completed, the curved plate 211 and the bellows 110 enclose the through groove 222 at the up-down position, the adjacent straight plates 221 are fastened to each other, and the fastened position is located in the adjacent assembly unit 100 b.

As shown in fig. 5, opposite protrusions 222a are formed on the front and rear sides of the through groove 222, notches 223a fastened in the protrusions 222a are formed on the fastening teeth 223 of the straight plate 221 at opposite positions, and the notches 223a are matched with the protrusions 222a, so that on one hand, adjacent assembly units 100b can be stably connected, and on the other hand, the axial bearing capacity of the fan group after the installation is completed can be effectively improved by increasing the embedding area of the fastening teeth 223 between the arc plate 211 and the bellows 110.

In this embodiment, the end portions of the straight plate 221 and the arc plate 211 in the single assembly unit 100b may be welded in a factory to assemble the bellows 110 and the blower, and the whole apparatus may be transported in two parts; at the tunnel construction position, the arc plate 211 is fixed on the tunnel inner wall 300 through the assembly hole 221a, and the straight plate 221 and the arc plate 211 of the adjacent assembly unit 100b are sequentially fixed on the tunnel inner wall 300 and are buckled with each other; then, the bellows 110 is fixed to the lower side of the straight plate 221, the bellows 110, the straight plate 221 and the arc plate 211 are simultaneously connected by bolts, the bellows 110 is assembled, and the adjacent bellows 110 is fixed by bolts, so that the whole assembly is completed.

In some embodiments, the fan mechanism 100 includes a bellows 110, as shown in fig. 6, where the bellows 110 is square, and has a chamber for accommodating a fan therein, a wire placing groove 111 is formed on the lower side of the bellows 110 along the depth direction, and the width of the wire placing groove 111 is adapted to the wire placing box 100a of the fan, so that the wire placing box 100a forms a sliding fit with the wire placing groove 111 to pre-position the fan; the front rack 113 and the rear rack 114 are respectively positioned at two ends of the air box 110, the front rack 113 is used for blocking the notch of the wire placing groove 111, the front rack 113 and the rear rack 114 both comprise a placement opening, a fan is placed on the placement opening, and the front rack 113 and the rear rack 114 are used for supporting the fan and blocking other spaces of the air box 110 after the air box 110 is installed.

In this embodiment, the wire placing groove 111 disposed at the lower side of the bellows 110 forms a guide track, and cooperates with the wire placing box 100a of the fan to form a preset position for the fan, and further, in this embodiment, the wire placing box 100a is located at the outer side of the bellows 110, compared with a large-sized manner designed to wrap the fan and the wire placing box 100a, the material is saved, and the cost is saved.

As shown in fig. 6, a sealing plate 112 is further included at the position of the wire placing groove 111, and is used for sealing the opening of the wire placing groove 111 after the fan is installed.

Referring to fig. 7, when the fan is installed, the rear frame 114 is placed inside the bellows 110, then the fan with the wire placing box 100a is placed into the bellows 110 along the wire placing groove 111, the wire placing box 100a moves in the wire placing groove 111 to form a preset position, the inner port of the fan is matched with the placement opening of the rear frame 114 and embedded in the placement opening of the rear frame 114, then the empty position of the wire placing groove 111 is blocked by the sealing plate 112, and the front frame 113 is installed, so that the outer port of the fan is positioned in the placement opening of the front frame 113 to form positioning and supporting of the fan.

As shown in fig. 7, the fan mechanism 100 further includes an air guiding portion 120, an air inlet of the air guiding portion 120 is connected with an air outlet of the air box 110, the fan blows air to the air guiding portion 120, and then the air is output from the air outlet of the air guiding portion 120, the air guiding portion 120 includes an air guiding plate 121 and a side air plate 122, the air guiding plate 121 is connected with an upper side of the air box 110 and is straight with an upper side plate of the air box 110, and the side air plate 122 is connected with a side surface of the air box 110; in some embodiments, the air deflectors 121, the side air panels 122 may be integrally designed with the windbox 110; the air guiding part 120 further comprises a pressurizing plate 124, the pressurizing plate 124 is arranged opposite to the air guiding plate 121, and the pressurizing plate 124 is connected with the lower side of the air box 110 and the side air plate 122, so that the air guiding part 120 is in a horn shape, the cross section of the air guiding part 120 can be any polygon such as triangle, square, semicircle, ellipse and the like, and the air outlet of the air guiding part 120 can be square, rectangle, circular arc, semicircle, any polygon and the like; that is, the air guiding opening of the air guiding portion 120 is smaller and smaller from the position of the air box 110 to the direction away from the air box 110, so as to form a supercharging effect.

As shown in fig. 7, the supercharging plate 124 is connected with the side air plate 122 in a T-shape, the connection strength is higher, the supercharging plate 124 is located in the edge of the side air plate 122 at the connection position of the side air plate 122, and a 1-2cm position is left at the edge of the side air plate 122, so that threaded holes are conveniently formed in the side air plate 122, and further, adjacent bellows 110 and the air guide 120 are conveniently connected with each other.

As shown in fig. 7, the air conditioner further comprises a guide plate 123, wherein the guide plate 123 is connected to the air deflector 121, and a linear extension line of the pressurizing plate 124 is connected with the guide plate 123; in some embodiments, the baffle 123 may be further disposed on the supercharging plate 124, and the cross section of the air deflector 121 is streamline, and may be specifically cylindrical, semi-cylindrical, circular arc, elliptical, or water drop, and the baffle 123 is preferably a circular plate with an arc of approximately 120 °.

The air direction of the air flow can be guided by the guide plate 123 on the air guide plate 121, so that vortex and turbulence are avoided after the air flow passes through the guide structure, and wind force is weakened; meanwhile, an integral wind surface can be formed at the junction to block the air from flowing reversely. The upper deflector 123 and the top of the wind box 110 are in a straight line, and the direction of the wind flow is straight forward along the inner wall 300 of the tunnel toward the inside of the tunnel. The form is suitable for extra-long tunnels, realizes pressurization through a box body structure so as to achieve enough wind pressure, solves the problem of large air resistance in the extra-long-distance tunnels, and solves the ventilation requirement of the extra-long tunnels.

A method for controlling a group of fans,

S1: grouping the fans in the fan group at intervals, and connecting the fans in parallel with the group of fans;

The groups of fans are grouped according to an arithmetic progression interval;

In the embodiment, the fan group comprises 20 fans, when the fan group is installed, all fans are divided into 4 groups according to an arithmetic progression according to actual conditions, and 1,5,9, 13 and 17 fans are connected in parallel into a first group from one end close to a power supply; 2,6, 10, 14, 18 are connected in parallel to form a second group; 3,7, 11, 15, 19 are connected in parallel to form a third group; the 4 th, 8 th, 12 th, 16 th and 20 th are connected in parallel to form a fourth group, each group is controlled by a single switch after being connected in parallel, namely, 4 single switches are all used, and when the main switch is opened, the independent switches of the default 4 groups of fans are simultaneously opened.

S2: a downshift wind speed average value and an upshift wind speed average value of the regional position in a preset time period;

Selecting an area position, such as an air outlet position of a tunnel, in a ventilation environment as a wind speed measurement area, selecting one or more wind speed measurement points in the area, installing a wind speed measurement device, measuring an actual wind speed average value in the area position through the one or more wind speed measurement points, and respectively connecting the wind speed measurement device with four switches of a wind turbine group through a control module in a wired or wireless mode.

And setting the time period to be 15 minutes by the control module, presetting the average value of the down-shift wind speed in the position of the area to be 1m/s, and presetting the average value of the up-shift wind speed to be 0.5m/s.

S3: detecting the actual wind speed in the position of the tunnel region in a time period, and obtaining the average value of the actual wind speed in the position of the region in the time period; the actual wind speed average value is larger than the preset downshift wind speed average value, and the work of a group of fans is reduced; the actual wind speed average value is smaller than the preset upshift wind speed average value, and a group of fans are added to work; and if the actual wind speed average value is between the downshifting wind speed average value and the upshifting wind speed average value, the working state of the fan group in the last time period is maintained.

In 15 minutes of a time period, 2 groups of fans are working, and the control module calculates an actual wind speed average value V in the regional position:

If V is more than 1m/s, closing a switch of a group of working fans in the next time period, reducing the working of the group of fans, wherein the next time period is 1 group of fans;

If V is less than 0.5m/s, starting a switch of a group of non-working fans in the next time period, adding a group of fans to work, and enabling the next time period to be 3 groups of fans to work;

If V is more than 0.5 and less than 1m/s, 2 groups of fans are kept to work in the next period.

The number of the fans in the group 4 is increased to be simultaneously used as the upper limit, and the number of the fans in the group 0 is reduced to be used as the lower limit.

According to the method for controlling the fan group, the working quantity of the fan group can be flexibly adjusted according to the natural environment of the tunnel, such as the natural wind pressure difference at two ends of the tunnel portal, so that the ventilation requirement of the tunnel can be timely met, and the overall electricity and energy saving effect is achieved.

The method is applied in the construction stage: taking a single tunnel length of 3KM and a bidirectional 6KM tunnel as an example, after tunneling 1.5KM (turning on the second vehicle-through),

Traditional (axial fan + soft wind band) form (monthly power):

110 KW/H2 (per group) 2 groups = 440KW/H;

440 KW/H24H 30 days/month = 316800 degrees electricity/month;

Fan group (monthly power):

0.39 KW/H50 (per group) 1 group = 19.5KW/H;

19.5 KW/H24H 30 days/month = 14040 degrees electricity/month;

The electricity saving per month is as follows: 316800-14040= 302760 degrees.

Example 2:

In contrast, referring to fig. 4, one arc plate 211 may correspond to a plurality of straight plates 221, and ends of the straight plates 221 are welded to the arc plate 211, and two side ends of the connected straight plates 221 are adapted to two side ends of the arc plate 211; or a plurality of bellows 110 are correspondingly arranged on one straight plate 221, and the bellows 110 are arranged on the lower side of the straight plate 221 in parallel.

Example 3:

The fan mechanism 100 comprises a wind box 110, as shown in fig. 8, the wind box 110 is square, a cavity for accommodating a fan is formed in the wind box 110, a wire placing groove 111 is formed in the lower side of the wind box 110 along the depth direction, the width of the wire placing groove 111 is matched with a wire placing box 100a of the fan, and accordingly the wire placing box 100a is in sliding fit with the wire placing groove 111 to pre-position the fan; the front rack 113 and the rear rack 114 are respectively positioned at two ends of the air box 110, the front rack 113 is used for blocking the notch of the wire placing groove 111, the front rack 113 and the rear rack 114 both comprise a placement opening, a fan is placed on the placement opening, and the front rack 113 and the rear rack 114 are used for supporting the fan and blocking other spaces of the air box 110 after the air box 110 is installed.

As shown in fig. 8, a sealing plate 112 is further included at the position of the wire placing groove 111, and is used for sealing the opening of the wire placing groove 111 after the fan is installed.

As shown in fig. 9, the fan mechanism 100 further includes an air guiding portion 120, an air inlet of the air guiding portion 120 is connected with an air outlet of the air box 110, the fan blows air to the air guiding portion 120, and then the air is output from the air outlet of the air guiding portion 120, the air guiding portion 120 includes air guiding plates 121 and side air plates 122, the air guiding plates 121 are connected with the upper side of the air box 110, and the number of the side air plates 122 is 2 and respectively connected with the side surfaces of the air box 110; in some embodiments, the air deflection 121, the side air deflection 122 may be integrally designed with the windbox 110.

As shown in fig. 9, the air deflector 121 is disposed at an angle with the wind direction of the air outlet of the fan, specifically, the air deflector 121 is connected to the upper side of the air box 110 and extends in the left-right direction, and it should be noted that, assuming that the air outlet direction of the fan is the axial direction of the fan, the air deflector 121 forms an angle of 8-15 ° with the axial direction of the fan, and the air deflector 121 forms a T-shaped connection with the side air plate 122, and in some embodiments, the air deflector 121 forms an angle of 9 °,10 °,11 °,12 °,13 °,14 °, and preferably a 12 ° angle with the axial direction of the fan.

In some embodiments, the air deflector 121 may also be connected to the underside of the windbox 110 at an angle of 8-15 ° to the axial direction of the fan.

As shown in fig. 9, the air deflector 123 is further included, the air deflector 123 is located on the air deflector 121, the cross section of the air deflector 121 is streamline, and specifically can be cylindrical, semi-cylindrical, circular arc, elliptical or drop-shaped, and the air deflector 123 is preferably a circular plate with an arc of approximately 120 °.

In this embodiment, the wind deflector 121 is disposed at an angle with the wind direction of the fan, and can guide the wind flow to a certain distance from the installation position of the fan group in the tunnel, for example, a junction is formed at a position 50 meters away from the fan group, so that the air flowing back from the wind resistance is effectively intercepted.

It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the utility model is not limited to the examples described in the detailed description, but rather falls within the scope of the utility model as defined by other embodiments derived from the technical solutions of the utility model by those skilled in the art.

Claims (10)

1. A bellows, the bellows (110) inside is formed with the cavity and is used for assembling the fan, bellows (110) have income wind gap and air outlet, its characterized in that: the air guide device is characterized by further comprising an air guide part (120), wherein the air guide part (120) is positioned at an air outlet of the air box (110), and the air guide part (120) is provided with a guide plate (123).

2. A bellows as claimed in claim 1, wherein: the air guide part (120) further comprises a side air plate (122) and an air guide plate (121), and the air guide plate (123) is connected to the air guide plate (121).

3. A bellows as claimed in claim 2, wherein: the air guide part (120) further comprises a pressurizing plate (124), and the pressurizing plate (124) and the air guide plate (121) are oppositely arranged.

4. A bellows as claimed in claim 2, wherein: the air deflector (121) is arranged at an angle with the wind direction of the wind outlet of the wind box (110), and the included angle is 8-15 degrees.

5. A bellows as claimed in claim 4, wherein: the wind deflector (121) is arranged at 12 degrees with the wind direction of the wind outlet of the wind box (110).

6. A bellows according to claim 3 or 4, wherein: the wind box (110) is internally provided with a wire placing groove (111) at the position of the wind inlet or the wind outlet, and the notch is matched with the wire placing box (100 a) of the fan in shape.

7. A bellows as claimed in claim 6, wherein: the sealing plate (112) is connected with the air box (110) to seal the wire placing groove (111).

8. A bellows as claimed in claim 6, wherein: the bellows (110) further comprises a front frame (113) and a rear frame (114), the front frame (113) and the rear frame (114) are respectively located at the positions of an air inlet and an air outlet of the bellows (110), and the front frame (113) or the rear frame (114) can seal the notch of the wire placing groove (111).

9. A bellows as claimed in claim 8, wherein: the front rack (113) and the rear rack (114) are respectively provided with a storage opening, and the storage openings are used for placing fans.

10. A fan group comprising the bellows of any one of claims 1-8, wherein the fan group comprises a plurality of bellows (110) and fans, and further comprising a bearing mechanism (200), the bearing mechanism (200) being connected to a plurality of the bellows (110) and configured to maintain the shape of the fan mechanism (100).