An automatic air control device combined with gas index in an ultra-long tunnel and a construction method

Abstract

The present invention relates to the technical field of tunnel construction devices, and more specifically, it relates to an automatic wind control device combined with a gas index in an ultra-long tunnel and a construction method. The device comprises an air duct, a fan arranged in the air duct and a gas monitor arranged in the tunnel. A filter assembly is arranged at the outer end of the air duct, and the filter assembly comprises a filter frame arranged in front of the fan. The filter frame is provided with a plurality of filter plates, and the gaps between adjacent filter plates serve as a rear air inlet. A fixed frame is arranged in the air duct, and the filter frame is slidably arranged between the inner frame surfaces of the fixed frame along the air inlet direction. A reset spring is connected between the filter frame and the fixed frame. A plurality of filter plates are rotatably arranged on the filter frame through a rotating shaft. A control rod is eccentrically connected to the outer end surface of the rotating shaft, and a control groove is opened on the inner frame surface of the fixed frame. The control rod is slidably arranged in the control groove. The present invention enables the filter assembly to be adaptively adjusted according to the power of the fan.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction devices, and in particular to an automatic wind control device combined with a gas index in an ultra-long tunnel and a construction method. Background Art

[0002] During the construction of super-long tunnels, in order to provide fresh air to the tunnel and dilute the concentration of harmful smoke and dust, fans must be used to supply air to the excavation working face through air ducts, which is called construction ventilation. When ventilating super-long tunnels during construction, there are two basic forms: enhanced ventilation and continuous ventilation. During the construction of blasting, mucking, shotcrete and other processes, the working face is seriously polluted and the air deteriorates. It is necessary to use enhanced ventilation with large air volume to dilute the concentration of harmful gases and dust in the tunnel in time and improve the air quality conditions in the working area. During the construction of other processes, since no pollution is generated, continuous ventilation with small air volume is used to meet the construction workers' demand for fresh air. Usually, in order to ensure the quality of ventilation, a filter component is also set at the air inlet of the air duct.

[0003] However, the filter components in the prior art often cannot be adaptively adjusted according to the power of the fan, resulting in that when the fan power increases, the filter components will hinder the timely replenishment of fresh air into the tunnel, and the filter components will be subjected to greater wind resistance and easily damaged. Summary of the invention

[0004] In order to enable the filter assembly to be adaptively adjusted according to the power of the fan, and to avoid the situation where the filter assembly hinders the timely replenishment of fresh air into the tunnel when the fan power increases, and the filter assembly is subjected to greater wind resistance and is easily damaged, the present application provides an automatic wind control device and construction method combined with a gas index in an ultra-long tunnel.

[0005] In a first aspect, the present invention provides an automatic wind control device in combination with a gas index in an ultra-long tunnel, which adopts the following technical solution:

[0006] An automatic wind control device combined with a gas index in an extra-long tunnel comprises an air duct, a fan arranged in the air duct and a gas monitor arranged in the tunnel, wherein a filter assembly is arranged at the outer end of the air duct, and the filter assembly comprises a filter frame arranged in front of the fan, the filter frame is provided with a plurality of filter plates, and the gaps between adjacent filter plates serve as a rear air inlet; a fixed frame is arranged in the air duct, the filter frame is slidably arranged between the inner frame surfaces of the fixed frame along the air inlet direction, and a reset spring is connected between the filter frame and the fixed frame; a plurality of filter plates are rotatably arranged on the filter frame by a rotating shaft, a control rod is eccentrically connected to the outer end surface of the rotating shaft, a control groove is opened on the inner frame surface of the fixed frame, and the control rod is slidably arranged in the control groove.

[0007] Preferably, the filter assembly also includes two air outlet baffles, which are arranged at an upper and lower interval on the outer end of the air duct, and the gap between the two air outlet baffles serves as a front air outlet; the left and right ends of the air outlet baffles are rotatably connected with sliders and rollers, the slider and roller of the upper air outlet baffle are distributed from top to bottom, and the slider and roller of the lower air outlet baffle are distributed from bottom to top, the inner side wall of the air duct is provided with a first guide groove for the slider to slide in the front and rear direction and a second guide groove for the roller to roll up and down, and a connecting rod is fixedly connected between the slider and the filter frame.

[0008] Preferably, two impellers are rotatably provided between the left and right inner sides of the air duct, and the two impellers are respectively located behind the two air outlet baffles. When the front air outlet is not expanded, the air outlet baffle blocks the impellers along the air inlet direction. When the front air outlet is expanded, the impellers are on the air inlet path.

[0009] Preferably, the control groove is inclined downward along the air inlet direction, so that the height of the outer end of the control groove is higher than the height of the inner end.

[0010] Preferably, an inner frame surface of the fixing frame is provided with a mounting groove, the mounting groove is connected from the outer end surface of the fixing frame to the outer end of the control groove, and the mounting groove is used for the control rod to be installed into the control groove.

[0011] Preferably, an anti-slip plate is detachably provided on the outer end surface of the fixing frame, and the anti-slip plate is located on the outward sliding path of the filter frame.

[0012] Preferably, a buffer pad is provided at the rear end of the anti-slip plate, and the buffer pad is used to abut against the filter frame moving outward.

[0013] Preferably, the rear end face of the fixed frame is provided with four L-shaped blocks, the rear end face of the filter frame is provided with four guide rods, the four guide rods pass through the four L-shaped blocks one by one along the air inlet direction, and four return springs are provided, the return springs are connected between the rear end face of the filter frame and the L-shaped blocks and allow the guide rods to pass through.

[0014] Preferably, the upper end of the tuyere baffle located above and the lower end of the tuyere baffle located below are both configured to have rounded corners.

[0015] In a second aspect, the present invention provides a construction method for an automatic wind control device in combination with a gas index in an ultra-long tunnel, which adopts the following technical solution:

[0016] A construction method for an automatic air control device combined with a gas index in an ultra-long tunnel, applied to the automatic air control device combined with a gas index in an ultra-long tunnel, comprises the following steps:

[0017] When the gas monitor detects that the toxic and harmful gases in the tunnel exceed the standard, the fan power increases, and at this time the filter frame moves inward due to the increase in wind force and further opens the rear air inlet, and at the same time the filter frame drives the air outlet baffle to swing and further open the front air inlet;

[0018] When the gas monitor detects that the toxic and harmful gases in the tunnel do not exceed the standard, the fan power is reduced. At this time, the filter frame resets outward and shrinks the rear air inlet due to the reduction in wind force. At the same time, the filter frame drives the air outlet baffle to reset and shrink the front air inlet.

[0019] The beneficial effects of the present invention are:

[0020] 1. When the fan increases the power and makes the filter frame slide inward, the rear air inlet between the multiple filter plates gradually increases. When the fan reduces the power and makes the filter frame slide outward, the rear air inlet between the multiple filter plates gradually decreases, so that the filter assembly can be adaptively adjusted with the power of the fan, avoiding the situation that when the fan power is increased, the filter assembly will prevent the fresh air from being replenished into the tunnel in time, and the filter assembly will be subjected to greater wind resistance and easily damaged;

[0021] 2. When the fan is switched from normal power to increased power to move the filter frame inward, the filter frame will drive the two air outlet baffles to swing inward, so that the two air outlet baffles form a V-shape to expand the front air outlet and facilitate more ambient fresh air to enter the air duct; and when the fan is switched from increased power to normal power to move the filter frame outward, the filter frame will drive the two air outlet baffles to swing outward to reduce the front air outlet, thereby restoring the effect of the initial filtration and further improving the adaptive adjustment ability of the process components;

[0022] 3. When the front air inlet is not expanded, the air outlet baffle blocks the impeller along the air inlet direction to avoid increasing the energy consumption of the fan due to the obstruction of the impeller. When the front air inlet is expanded, the impeller is on the air inlet path. At this time, the impeller guides the wind to the top and bottom of the filter frame through rotation to avoid the wind concentration on the middle of the filter frame, which not only protects the filter frame, but also achieves the effect of fully utilizing the filter frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an external structural diagram of the automatic wind control device in an embodiment of the present application;

[0024] Figure 2 is an internal structure diagram of the automatic wind control device in the embodiment of the present application;

[0025] Figure 3 is a structural cross-sectional view of the automatic wind control device in the embodiment of the present application operating at normal power;

[0026] Figure 4is a structural cross-sectional view of a fixed frame in an embodiment of the present application;

[0027] Figure 5 is a structural diagram of a filter plate in an embodiment of the present application;

[0028] Figure 6 is a structural cross-sectional view of the automatic wind control device in the embodiment of the present application operating at increased power;

[0029] Explanation of the accompanying drawings: 1. air duct; 2. fan; 3. air outlet baffle; 31. slider; 32. roller; 4. filter frame; 41. filter plate; 42. rotating shaft; 43. control rod; 44. connecting rod; 5. fixing frame; 51. control groove; 52. mounting groove; 53. anti-slip plate; 61. L-shaped block; 62. reset spring; 63. guide rod; 71. first guide groove; 72. second guide groove; 8. impeller. DETAILED DESCRIPTION

[0030] The following will be combined with the attached Figure 1-6 The present invention is further illustrated by the following embodiments.

[0031] This embodiment discloses an automatic wind control device in combination with a gas index in an ultra-long tunnel.

[0032] Reference Figure 1 and Figure 2 The automatic wind control device combined with the gas index in the super-long tunnel includes an air duct 1, a fan 2 and a gas monitor, wherein the gas monitor is arranged in the tunnel to monitor the content of various toxic and harmful gases in the tunnel, such as carbon monoxide, carbon dioxide, methane, hydrogen sulfide and ammonia. The air duct 1 is used to connect the tunnel with the external environment, and the fan 2 is arranged in the air duct 1. When the gas monitor does not detect that the content of toxic and harmful gases exceeds the standard, the fan 2 operates at normal power, thereby continuously providing fresh air to the tunnel. When the gas monitor detects that the content of toxic and harmful gases exceeds the standard, the fan 2 operates at increased power, thereby providing a large amount of fresh air to the tunnel more quickly, with the purpose of timely removing the toxic and harmful gases exceeding the standard in the tunnel. In this embodiment, the air duct 1 is a rectangular air duct 1, and the fan 2 is an axial flow fan 2.

[0033] Reference Figure 2 and Figure 3In order to improve the quality of fresh air, a filter assembly is provided at the outer end of the air duct 1. In the present invention, the filter assembly includes an air outlet baffle 3 and a filter frame 4. There are two air outlet baffles 3, which are arranged at intervals at the outer end of the air duct 1. The gap between the two air outlet baffles 3 serves as a front air inlet. By providing two air outlet baffles 3, large pieces of garbage can be prevented from entering the air duct 1. Therefore, the two air outlet baffles 3 play a preliminary filtering effect. Further, the filter frame 4 is provided between the fan 2 and the air outlet baffle 3. The filter frame 4 is vertically arranged with multiple filter plates 41. The gap between adjacent filter plates 41 serves as a rear air inlet. By providing the filter frame 4, small pieces of garbage can be prevented from entering the air duct 1. Therefore, the filter frame 4 plays a secondary filtering effect. Finally, the effect of improving the quality of fresh air is achieved through the filter assembly.

[0034] When the fan 2 is adjusted from normal power to increased power, the air intake in front of the filter frame 4 will increase dramatically. If the rear air inlet between the filter plates 41 in the filter frame 4 remains unchanged, the following adverse effects will occur: first, it will hinder the required large amount of fresh air from entering the tunnel in time; second, the filter frame 4 will be subjected to greater wind resistance and easily damaged. For this reason, the following improvements are made between the air duct 1 and the filter frame 4 in the present invention.

[0035] Reference Figures 2 to 5A fixed frame 5 is provided in the air duct 1, and the outer frame surface of the fixed frame 5 fits the inner wall of the air duct 1. The filter frame 4 is slidably arranged between the inner frame surfaces of the fixed frame 5 along the air inlet direction of the air duct 1. A return spring 62 is connected between the filter frame 4 and the fixed frame 5. The return spring 62 is located at the rear end of the filter frame 4 and the deformation direction is in the air inlet direction of the air duct 1. When the fan 2 is changed from normal power to increased power to increase the wind force of the incoming air, the filter frame 4 slides inward under the action of the wind force and compresses the return spring 62. When the fan 2 is changed from increased power to normal power to reduce the wind force of the incoming air, the filter frame 4 slides outward under the resetting action of the return spring 62. Furthermore, multiple filter plates 41 of the filter frame 4 are rotatably set on the filter frame 4 through a rotating shaft 42. The outer end of the rotating shaft 42 penetrates the inner frame surface of the fixed frame 5. The outer end surface of the rotating shaft 42 is eccentrically connected to a control rod 43. The control rod 43 is a round rod. The inner frame surface of the fixed frame 5 is provided with a control groove 51. The control rod 43 is slidably set in the control groove 51. When the control rod 43 moves between the two ends of the control groove 51, it controls the rotation of the rotating shaft 42. In the present invention, when the control rod 43 moves from the outside to the inside, the filter plate 41 is controlled to gradually change from a vertical state to a horizontal state. When the control rod 43 moves from the inside to the outside, the filter plate 41 is controlled to gradually change from a horizontal state to a vertical state. Based on this design, when the fan 2 increases its power to make the filter frame 4 slide inward, the rear air inlet between the multiple filter plates 41 gradually increases. When the fan 2 reduces its power to make the filter frame 4 slide outward, the rear air inlet between the multiple filter plates 41 gradually decreases, so that the filtering effect and air intake effect of the filter frame 4 can be adaptively adjusted with the power of the fan 2 to balance the filtering effect and the air intake effect, avoiding the adverse effect caused by the increase of the power of the fan 2 while the size of the rear air inlet remains unchanged.

[0036] Reference Figure 4 Specifically, the control slot 51 is tilted downward along the air inlet direction, so that the height of the outer end of the control slot 51 is higher than the height of the inner end, so that the control rod 43 can swing down when moving from the outside to the inside in the control slot 51, and finally the filter plate 41 is driven by the rotating shaft 42 for rotation adjustment. Furthermore, the inner frame surface of the fixed frame 5 is provided with a mounting slot 52, which is connected from the outer end surface of the fixed frame 5 to the outer end of the control slot 51, and the mounting slot 52 is used for the control rod 43 to be installed in the control slot 51, so as to achieve the effect of convenient installation.

[0037] Reference Figure 2 and Figure 3 In the process of the filter frame 4 moving outward, there is a risk that the control rod 43 slips out of the mounting groove 52, thereby causing the filter plate 41 to fall off. For this reason, an anti-slip plate 53 is provided on the outer end surface of the fixing frame 5 by screws. The anti-slip plate 53 is located on the path of the filter frame 4 sliding outward, thereby preventing the filter plate 41 from falling off. Furthermore, a buffer pad is provided at the rear end of the anti-slip plate 53, which is used to abut against the filter frame 4 moving outward, thereby preventing the filter frame 4 from having a hard contact with the anti-slip plate 53.

[0038] Reference Figure 3 In order to realize the connection of the return spring 62, the rear end face of the fixed frame 5 is provided with four L-shaped blocks 61, and the rear end face of the filter frame 4 is provided with four guide rods 63. The four guide rods 63 pass through the four L-shaped blocks 61 one by one along the air inlet direction. Correspondingly, four return springs 62 are provided. The return spring 62 is connected between the rear end face of the filter frame 4 and the L-shaped block 61 and is passed through by the guide rods 63, so that the filter frame 4 can compress the return spring 62 under the action of wind force.

[0039] Reference Figure 2 , Figure 3 and Figure 6 , the left and right ends of the air outlet baffle 3 are rotatably connected with a slider 31 and a roller 32, and the slider 31 and the roller 32 between the two air outlet baffles 3 are mirrored, that is, the slider 31 and the roller 32 of the upper air outlet baffle 3 are distributed from top to bottom, and the slider 31 and the roller 32 of the lower air outlet baffle 3 are distributed from bottom to top. Further, the inner wall of the air duct 1 is provided with a first guide groove 71 for the slider 31 to slide in the front-to-back direction and a second guide groove 72 for the roller 32 to roll up and down, and a connecting rod 44 is fixedly connected between the slider 31 and the filter frame 4. Through this design, when the fan 2 is switched from normal power to increased power to move the filter frame 4 inward, the filter frame 4 will drive the two air outlet baffles 3 to swing inward, so that the two air outlet baffles 3 are in a V-shaped state, so as to expand the front air outlet and facilitate more environmental fresh air to enter the air duct 1. When the fan 2 changes from increased power to normal power to move the filter frame 4 outward, the filter frame 4 will drive the two air outlet baffles 3 to swing outward to reduce the front air outlet, thereby restoring the effect of preliminary filtering. In addition, the upper end of the air outlet baffle 3 located above and the lower end of the air outlet baffle 3 located below are both set to rounded corners to facilitate the swing of the air outlet baffle 3.

[0040] Reference Figure 3 and Figure 6 Two impellers 8 are rotatably arranged between the left and right inner sides of the air duct 1, and the two impellers 8 are respectively located behind the two air outlet baffles 3. When the current air inlet is not expanded, the air outlet baffle 3 blocks the impeller 8 along the air inlet direction to avoid increasing the energy consumption of the fan 2 due to the obstruction of the impeller 8. When the current air inlet is expanded, the impeller 8 is on the air inlet path. At this time, the impeller 8 guides the wind force to the top and bottom of the filter frame 4 through rotation, avoiding the wind force from concentrating on the middle part of the filter frame 4, which not only protects the filter frame 4, but also achieves the effect of fully utilizing the filter frame 4.

[0041] This embodiment also discloses a construction method of an automatic wind control device combined with a gas index in an ultra-long tunnel.

[0042] The construction method of the automatic air control device combined with the gas index in the super-long tunnel includes the following steps:

[0043] When the gas monitor detects that the toxic and harmful gases in the tunnel exceed the standard, the power of the fan 2 increases. At this time, the filter frame 4 moves inward due to the increase in wind force and further opens the rear air inlet. At the same time, the filter frame 4 drives the air outlet baffle 3 to swing and further open the front air inlet.

[0044] When the gas monitor detects that the toxic and harmful gases in the tunnel do not exceed the standard, the power of the fan 2 is reduced. At this time, the filter frame 4 resets outward and reduces the rear air inlet due to the reduction in wind force. At the same time, the filter frame 4 drives the air outlet baffle 3 to reset and reduce the front air inlet.

[0045] The above are all preferred embodiments of the present invention, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic wind control device in combination with a gas index in an ultra-long tunnel, characterized in that: The invention comprises an air duct (1), a fan (2) arranged in the air duct (1), and a gas monitor arranged in a tunnel, wherein a filter assembly is arranged at the outer end of the air duct (1), and the filter assembly comprises a filter frame (4) arranged in front of the fan (2), the filter frame (4) being provided with a plurality of filter plates (41), and the gaps between adjacent filter plates (41) serving as a rear air inlet; a fixed frame (5) is arranged in the air duct (1), the filter frame (4) is slidably arranged between the inner frame surfaces of the fixed frame (5) along the air inlet direction, and a return spring (62) is connected between the filter frame (4) and the fixed frame (5); the plurality of filter plates (41) are rotatably arranged on the filter frame (4) via a rotating shaft (42), the outer end surface of the rotating shaft (42) is eccentrically connected to a control rod (43), the inner frame surface of the fixed frame (5) is provided with a control groove (51), and the control rod (43) is slidably arranged in the control groove (51); The filter assembly further comprises two air outlet baffles (3), the two air outlet baffles (3) being arranged at an interval up and down at the outer end of the air duct (1), and the gap between the two air outlet baffles (3) serving as a front air outlet; the left and right ends of the air outlet baffles (3) are rotatably connected with sliders (31) and rollers (32), the sliders (31) and rollers (32) of the upper air outlet baffle (3) being arranged from top to bottom, and the sliders (31) and rollers (32) of the lower air outlet baffle (3) being arranged from bottom to top, the inner side wall of the air duct (1) being provided with a first guide groove (71) for the slider (31) to slide in a front-to-rear direction and a second guide groove (72) for the roller (32) to roll up and down, and a connecting rod (44) being fixedly connected between the slider (31) and the filter frame (4); Two impellers (8) are rotatably arranged between the left and right inner sides of the air duct (1), and the two impellers (8) are respectively located behind the two air outlet baffles (3); when the front air outlet is not expanded, the air outlet baffle (3) blocks the impellers (8) along the air inlet direction; when the front air outlet is expanded, the impellers (8) are located on the air inlet path; The control groove (51) is inclined downward along the air inlet direction, so that the height of the outer end of the control groove (51) is higher than the height of the inner end.

2. According to claim 1, the automatic air control device in combination with the gas index in the ultra-long tunnel is characterized by: The inner frame surface of the fixed frame (5) is provided with a mounting groove (52), the mounting groove (52) is connected from the outer end surface of the fixed frame (5) to the outer end of the control groove (51), and the mounting groove (52) is used for the control rod (43) to be installed in the control groove (51).

3. The automatic air control device in combination with gas index in an ultra-long tunnel according to claim 2 is characterized in that: An anti-slip plate (53) is detachably provided on the outer end surface of the fixing frame (5), and the anti-slip plate (53) is located on the path of the filter frame (4) sliding outwards.

4. The automatic air control device in combination with gas index in an ultra-long tunnel according to claim 3 is characterized by: A buffer pad is provided at the rear end of the anti-slip plate (53), and the buffer pad is used to abut against the filter frame (4) moving outward.

5. The automatic air control device in combination with gas index in an ultra-long tunnel according to claim 1 is characterized in that: The rear end surface of the fixing frame (5) is provided with four L-shaped blocks (61), the rear end surface of the filter frame (4) is provided with four guide rods (63), the four guide rods (63) pass through the four L-shaped blocks (61) one by one along the air inlet direction, and four return springs (62) are provided, the return springs (62) are connected between the rear end surface of the filter frame (4) and the L-shaped blocks (61) and are passed through by the guide rods (63).

6. The automatic air control device in combination with gas index in an ultra-long tunnel according to claim 1 is characterized by: The upper end of the tuyere baffle plate (3) located above and the lower end of the tuyere baffle plate (3) located below are both arranged to have rounded corners.

7. A construction method for an automatic air control device in combination with a gas index in an ultra-long tunnel, using the automatic air control device in combination with a gas index in an ultra-long tunnel as claimed in claim 1, characterized in that: The following steps are involved: When the gas monitor detects that the toxic and harmful gases in the tunnel exceed the standard, the power of the fan (2) increases, and at this time the filter frame (4) moves inward due to the increase in wind force and further opens the rear air inlet, and at the same time the filter frame (4) drives the air outlet baffle (3) to swing and further open the front air inlet; When the gas monitor detects that the toxic and harmful gases in the tunnel do not exceed the standard, the power of the fan (2) is reduced. At this time, the filter frame (4) is reset outward due to the reduction of wind force and the rear air inlet is reduced. At the same time, the filter frame (4) drives the air outlet baffle (3) to reset and reduce the front air inlet.

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