Ventilation device for highway tunnel

Abstract

The ventilation device for the highway tunnel comprises a jet fan, two supporting plates are symmetrically arranged at the top of the jet fan, ventilation openings are formed in the two ends of the jet fan, a filter screen is installed on each ventilation opening, a transverse pipe is arranged in the center of an installation plate through a bearing, an air pipe is connected to the other end of the transverse pipe, and the transverse pipe is hollow. A plurality of spray heads are uniformly distributed on one side, close to the filter screen, of the air pipe; the cleaning assembly is matched with the driving assembly, the driving assembly drives an air pipe in the cleaning assembly to rotate with the help of wind power blown out by the jet fan as driving force, and meanwhile the wind power of the jet fan is sprayed out through a plurality of sprayers through the cooperation of a transverse pipe and the air pipe; dust and other impurities attached to the filter screen can be blown away by wind power blown out by the spray head, and the dust and other impurities are blown away from the jet fan under the ventilation effect of the jet fan, so that the purpose of cleaning the filter screen is achieved.

Description

Technical Field

[0001] The utility model relates to the field of tunnel ventilation equipment, in particular to a ventilation device for highway tunnels. Background Art

[0002] A jet fan is a special axial flow fan, mainly used in the longitudinal ventilation systems of tunnels such as highways, railways and subways to provide all the thrust; harmful gases and pollutants such as exhaust gas, dust and smoke are likely to accumulate inside highway tunnels. The jet fan quickly discharges these harmful gases out of the tunnel through a strong air flow to keep the air inside the tunnel circulating.

[0003] However, the jet fan is in an environment of dust, smoke, etc. for a long time, and impurities such as dust and dirt are easily adhered to the filter screen at the ventilation port. Generally, the jet fan is cleaned manually at regular intervals. The jet fan is installed on the tunnel vault and is connected to the embedded block during tunnel civil engineering by directly welding the embedded block on the tunnel vault and the jet fan housing with a connecting steel plate or by a bolt connection method. However, due to the relatively high installation position, manual cleaning is very inconvenient. If too much dust and other impurities accumulate on the filter screen, it will affect the ventilation effect and efficiency of the jet fan. Therefore, a ventilation device for highway tunnels is proposed to solve the problems of the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a ventilation device for highway tunnels. By setting up a cleaning component and a driving component in cooperation, the driving component uses the wind force blown out by the jet fan as the driving force to drive the air pipe in the cleaning component to rotate, reducing the situation of additionally installing a driving part and reducing the economic cost. At the same time, by the cooperation of the horizontal pipe and the air pipe using the wind force of the jet fan, the wind force is sprayed out through multiple nozzles. The wind force blown out by the nozzles can blow away impurities such as dust attached to the filter screen. And under the ventilation action of the jet fan, the dust and other impurities are blown away from the jet fan, achieving the purpose of cleaning the filter screen. To achieve the above-mentioned utility model purpose, the technical scheme adopted by the utility model is as follows:

[0005] According to one aspect of the utility model, a ventilation device for highway tunnels is provided, including a jet fan. Two support plates are symmetrically arranged at the top of the jet fan. Ventilation ports are arranged at both ends of the jet fan. A filter screen is installed on each ventilation port. Cleaning components for cleaning the filter screens are arranged at both ends of the jet fan.

[0006] Preferably, the cleaning assembly includes a mounting plate, an air pipe, and a nozzle. A mounting plate is vertically installed in the middle of the filter net. A horizontal pipe is provided at the center of the mounting plate through a bearing. The other end of the horizontal pipe is connected with an air pipe, and the horizontal pipe is hollow and communicates with the jet blower and the air pipe. A plurality of nozzles are evenly distributed on one side of the air pipe close to the filter net. A driving assembly for driving the air pipe to rotate is connected to the air pipe.

[0007] Preferably, the driving assembly includes a cross bar, a connecting rod, a driving fan, a clamping block, and a clamping groove. A cross bar is connected to the outer side wall of the middle of the air pipe, and the cross bar is coaxially arranged with the horizontal pipe. A connecting rod is fixedly installed at the end of the cross bar away from the air pipe, and a driving fan is rotatably installed on the connecting rod through a bearing. Two limiting plates are symmetrically arranged on the driving fan in the circumferential direction, and a clamping block is provided on each limiting plate. An annular groove is formed on the outer side wall of the cross bar, and a plurality of clamping grooves are evenly distributed in the annular groove.

[0008] Preferably, each limiting plate is connected to the driving fan through a torsion spring.

[0009] Preferably, two inclined plates are symmetrically installed on each mounting plate, and the cross-sectional shapes of the two inclined plates and the mounting plate are in a shape of an inverted V.

[0010] Preferably, each nozzle is a flat nozzle, and the nozzles of the plurality of nozzles on the upper and lower sections of the air pipe face different directions.

[0011] Preferably, a cloth strip is provided below each nozzle.

[0012] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0013] 1. For the ventilation device for a highway tunnel of the present utility model, by setting the cleaning assembly and the driving assembly to cooperate, the driving assembly uses the wind force blown by the jet blower as the driving force to drive the air pipe in the cleaning assembly to rotate, reducing the situation of additionally installing a driving member, reducing the economic cost. At the same time, by using the wind force of the jet blower through the cooperation of the horizontal pipe and the air pipe, the wind force is ejected through a plurality of nozzles. The wind force blown by the nozzles can blow away dust and other impurities attached to the filter net, and under the ventilation action of the jet blower, the dust and other impurities are blown away from the jet blower, achieving the purpose of cleaning the filter net.

[0014] 2. For the ventilation device for a highway tunnel of the present utility model, by setting the change of the rotation speed of the jet blower as the starting condition of the cleaning assembly, it is avoided that the air pipe rotates for a long time, which may have a certain negative impact on the ventilation effect of the jet blower, and further affect the ventilation efficiency of the jet blower, improving the efficiency.

[0015] 3. A ventilation device for highway tunnels according to the present utility model. A cloth strip is provided below each nozzle. When rotating, when the cloth strip touches the impurities on the filter net, the cloth strip plays a scrubbing effect. Under the action of the rotating force, the dirt formed by the wet dust is cleaned to prevent affecting the ventilation effect of the normal operation of the jet fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the present utility model;

[0017] Figure 2 is the present utility model Figure 1 enlarged view of part A;

[0018] Figure 3 is a schematic structural view of the air pipe of the present utility model;

[0019] Figure 4 is the present utility model Figure 3 sectional view taken along line B - B;

[0020] In the drawings, 1. jet fan; 2. support plate; 3. ventilation opening; 4. filter net; 5. mounting plate; 6. horizontal pipe; 7. air pipe; 8. nozzle; 9. cross bar; 10. connecting rod; 11. driving fan; 12. limiting plate; 13. clamping block; 14. annular groove; 15. clamping groove; 16. inclined plate; 17. cloth strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the purpose, technical solutions and advantages of the present utility model more clear and understandable, the following preferred embodiments are cited with reference to the accompanying drawings for further detailed description of the present utility model. However, it should be noted that many details listed in the specification are only for enabling the reader to have a thorough understanding of one or more aspects of the utility model, and these aspects of the present utility model can be realized even without these specific details.

[0022] Please refer to Figures 1 to 4 , the present utility model provides a ventilation device for highway tunnels, and the technical solutions are as follows:

[0023] It includes a jet fan 1. Two support plates 2 are symmetrically arranged at the top of the jet fan 1. Ventilation openings 3 are arranged at both ends of the jet fan 1. A filter net 4 is installed on each ventilation opening 3. Cleaning components for cleaning the filter net 4 are arranged at both ends of the jet fan 1; the cleaning components include a mounting plate 5, an air pipe 7 and a nozzle 8. A mounting plate 5 is vertically installed in the middle of the filter net 4. A horizontal pipe 6 is provided at the center of the mounting plate 5 through a bearing. The other end of the horizontal pipe 6 is connected to the air pipe 7, and the horizontal pipe 6 is hollow and communicates with the jet fan 1 and the air pipe 7. A plurality of nozzles 8 are evenly distributed on the side of the air pipe 7 close to the filter net 4. A driving component for driving the air pipe 7 to rotate is connected to the air pipe 7.

[0024] Harmful gases and pollutants such as exhaust gas, dust, and smoke are likely to accumulate inside highway tunnels. The jet fan 1 uses a strong air flow to quickly discharge these harmful gases from the tunnel, keeping the air in the tunnel fresh and circulating, and reducing the impact of pollutants on human health. However, the jet fan 1 is long-term in an environment of dust, smoke, etc., and impurities such as dust and dirt are likely to adhere to the filter screen 4 at the ventilation port 3. Generally, the jet fan 1 is cleaned manually at regular intervals. If the dust, dirt and other impurities on the filter screen 4 cannot be cleaned in time, it will affect the ventilation effect and efficiency of the jet fan 1.

[0025] When the jet fan 1 starts to ventilate, the wind enters the air pipe 7 through the horizontal pipe 6. At the same time, with the help of the wind blown by the jet fan 1, the driving assembly is started, driving the air pipe 7 to rotate around the horizontal pipe 6 as the axis. The wind is compressed by the nozzle 8, and the nozzle 8 is relatively close to the filter screen 4, about 1-2 cm away. Then the wind blown out by the nozzle 8 can blow away the dust and other impurities attached to the filter screen 4. And under the ventilation of the jet fan 1, the dust and other impurities are blown away from the jet fan 1, achieving the purpose of cleaning the filter screen 4, and with the help of the wind blown by the jet fan 1, the situation of additionally installing a driving part is reduced, reducing the economic cost.

[0026] The driving assembly includes a cross bar 9, a connecting rod 10, a driving fan 11, a clamping block 13 and a clamping groove 15. A cross bar 9 is connected to the outer side wall of the middle of the air pipe 7, and the cross bar 9 is coaxially arranged with the horizontal pipe 6. A connecting rod 10 is fixedly installed at one end of the cross bar 9 away from the air pipe 7, and a driving fan 11 is rotatably installed on the connecting rod 10 through a bearing. There are two limiting plates 12 symmetrically arranged on the circumference of the driving fan 11, and a clamping block 13 is provided on each limiting plate 12. An annular groove 14 is opened on the outer side wall of the cross bar 9, and a plurality of clamping grooves 15 are evenly distributed in the annular groove 14; each limiting plate 12 is connected to the driving fan 11 through a torsion spring; when the jet fan 1 is operating normally, the wind drives the driving fan 11 to rotate, and at the same time drives the two limiting plates 12 to rotate. Under the action of the torsion spring, the clamping ring on the limiting plate 12 continuously engages with the clamping groove 15 in the annular groove 14. Then the driving fan 11 rotates to drive the cross bar 9 to rotate. And since the cross bar 9 is connected to the air pipe 7, it can drive the air pipe 7 to rotate around the cross bar 9 as the axis. Then the wind of the jet fan 1 enters the air pipe 7 through the horizontal pipe 6 and is sprayed out from a plurality of nozzles 8, blowing away the dust and other impurities attached to the filter screen 4, avoiding affecting the ventilation effect and efficiency.

[0027] When the air duct 7 rotates, it will have a certain negative impact on the ventilation effect of the jet fan 1. If the jet fan 1 continuously drives the air duct 7 to rotate, it will affect the efficiency of the entire ventilation. It is set that the rotational speed of the jet fan 1 decreases after starting for a period of time. When the jet fan 1 is at the normal rotational speed, the rotational speed of the driving fan 11 increases, so the centrifugal force applied to the two limiting plates 12 increases. When the centrifugal force is greater than the acting force of the torsion spring, the two limiting plates 12 are driven to gradually move outward in a centrifugal motion, that is, the clamping blocks 13 disengage from the card slots 15, and then the driving fan 11 rotates while the air duct 7 does not follow. When the rotational speed of the jet fan 1 decreases, the rotational speed of the driving fan 11 decreases, so the centrifugal force applied to the two limiting plates 12 decreases. When the centrifugal force is less than the acting force of the torsion spring, the two clamping blocks 13 gradually approach the card slots 15 in the annular groove 14 and engage with the card slots 15 during the rotation process, thereby driving the air duct 7 to rotate, and then cleaning the filter net 4. By setting the change in the rotational speed of the jet fan 1, the effect of whether to enable the cleaning component to clean the filter net 4 is achieved, avoiding the air duct 7 rotating for a long time, which will have a certain negative impact on the ventilation effect of the jet fan 1 and further affecting the ventilation efficiency of the jet fan 1, thus improving the efficiency.

[0028] Two inclined plates 16 are symmetrically installed on each of the mounting plates 5, and the cross-sectional shapes of the two inclined plates 16 and the mounting plate 5 are in an eight-shaped configuration; the inclination angle between the two inclined plates 16 and the mounting plate 5 is an acute angle, set at 30° - 40°. When the jet fan 1 ventilates and is guided by the inclined plates 16, it will flow from both sides of the mounting plate 5, thereby forming a wind pressure inside and outside the mounting plate 5. When the jet fan 1 starts, the wind force will increase from small to large until the maximum value. During this process, the driving fan 11 will drive the air duct 7 to rotate until the centrifugal force applied by the driving fan 11 to the limiting plate 12 is greater than the acting force of the torsion spring. The air duct 7 that disengages from the driving fan 11 continues to rotate under the action of inertia. At this time, a wind pressure is formed inside and outside the mounting plate 5. When the air duct 7 rotates to the vertical state, the entire air duct 7 enters the mounting plate 5. Due to the wind pressure, the rotation of the air duct 7 is restricted, so that the air duct 7 can be stably in the mounting plate 5, avoiding the continuous rotation from affecting the normal ventilation efficiency of the jet fan 1; when the jet fan 1 decelerates, the air duct 7 is driven by the driving fan 11 to rotate and clean again.

[0029] Each of the nozzles 8 is a flat nozzle 8, and the nozzles of the multiple nozzles 8 on the upper and lower sections of the air duct 7 face different directions; the flat nozzle 8 increases the range of the gas sprayed by the nozzle 8, and while increasing the range, it can reduce the setting of the number of nozzles 8; due to the complex shape of the filter net 4, the nozzles 8 with the same nozzle orientation may be missed. The nozzles of the multiple nozzles 8 on the upper and lower sections of the air duct 7 are set in different directions, that is, the nozzles of some nozzles 8 are arranged horizontally, and the nozzles of some nozzles 8 are arranged vertically. During the rotation cleaning process, it can clean each position and corner of the filter net 4 as much as possible, improving the cleaning effect.

[0030] A cloth strip 17 is provided below each of the spray heads 8; in a humid climate or in an area with a relatively high groundwater level, the humidity inside the tunnel may be too high. As a result, the cleaning effect of blowing away dust and other impurities adhering to the filter screen 4 by wind may not be good. A cloth strip 17 is provided below each spray head 8. When the cloth strip 17 rotates and contacts the impurities on the filter screen 4, the cloth strip 17 plays a scrubbing effect. Under the action of the rotational force, the dirt formed by the wet dust is cleaned to prevent the ventilation effect that affects the normal operation of the jet fan 1.

[0031] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A ventilation device for a highway tunnel, characterized in that: include: A jet fan (1), wherein two support plates (2) are symmetrically arranged on the top of the jet fan (1), ventilation holes (3) are arranged at both ends of the jet fan (1), a filter screen (4) is installed on each ventilation hole (3), and cleaning components for cleaning the filter screen (4) are arranged on both ends of the jet fan (1).

2. A ventilation device for a highway tunnel according to claim 1, characterized in that: The cleaning component comprises a mounting plate (5), an air pipe (7) and a nozzle (8); the mounting plate (5) is vertically mounted in the middle of the filter screen (4); a transverse tube (6) is provided in the center of the mounting plate (5) through a bearing; the other end of the transverse tube (6) is connected to the air pipe (7); the transverse tube (6) is hollow and connects the jet fan (1) and the air pipe (7); a plurality of nozzles (8) are evenly distributed on one side of the air pipe (7) close to the filter screen (4); and a driving component for driving the air pipe (7) to rotate is connected to the air pipe (7).

3. A ventilation device for a highway tunnel according to claim 2, characterized in that: The driving assembly comprises a cross bar (9), a connecting rod (10), a driving fan (11), a block (13) and a slot (15); a cross bar (9) is connected to the middle outer wall of the air pipe (7), and the cross bar (9) is coaxially arranged with the cross pipe (6); a connecting rod (10) is fixedly mounted on one end of the cross bar (9) away from the air pipe (7), and a driving fan (11) is rotatably mounted on the connecting rod (10) via a bearing; two limiting plates (12) are circumferentially symmetrical on the driving fan (11), and each limiting plate (12) is provided with a block (13); an annular groove (14) is provided on the outer wall of the cross bar (9), and a plurality of slots (15) are evenly distributed in the annular groove (14).

4. A ventilation device for a highway tunnel according to claim 3, characterized in that: Each of the limiting plates (12) is connected to the driving fan (11) via a torsion spring.

5. A ventilation device for a highway tunnel according to claim 2, characterized in that: Two inclined plates (16) are symmetrically mounted on each of the mounting plates (5), and the cross-sectional shape of the two inclined plates (16) and the mounting plate (5) is an eight-shaped shape.

6. A ventilation device for a highway tunnel according to claim 2, characterized in that: Each of the spray heads (8) is a flat-mouth spray head (8), and the nozzles of the plurality of spray heads (8) at the upper and lower sections of the air pipe (7) are oriented in different directions.

7. A ventilation device for a highway tunnel according to claim 2, characterized in that: A cloth strip (17) is provided below each of the spray heads (8).

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