An F-type push-in ventilation system with a three-way variable diameter turning air duct and its use method

Abstract

The present invention belongs to the technical field of tunnel ventilation, and particularly relates to an F-type push-in ventilation system with a three-way variable diameter curved air duct and its use method. The system includes a right tunnel and a left tunnel arranged in parallel, a transverse passage between the right and left tunnels, and a transverse tunnel. A transverse tunnel construction area ventilation module is provided within the transverse tunnel. The module includes a variable frequency axial flow fan II, a flexible air duct II with an F-shaped pipeline structure, a flexible air duct for the left tunnel, a flexible air duct for the transverse passage, and a flexible air duct for the right tunnel. A three-way rigid air duct connection structure is provided at the connection between the flexible air duct II and the soft air duct for the left tunnel, and a curved curved rigid air duct connection structure is provided at the connection between the flexible air duct for the transverse passage and the soft air duct for the right tunnel. The soft air duct for the left tunnel and the soft air duct for the right tunnel, respectively, face the tunnel face II. The present invention utilizes multiple transverse tunnels for auxiliary ventilation and adopts a curved rigid air duct connection structure, which can effectively reduce wind pressure loss, achieve good ventilation effects, and reduce ventilation costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel ventilation, and in particular relates to an F-type push-in ventilation system of a three-way variable-diameter turning air duct and a use method thereof. Background Art

[0002] Due to the complex construction environment characteristics of ultra-long tunnels, such as long tunnel air supply distance, long construction period, large number of construction machinery and equipment and personnel, and crossing of poor geological bodies, higher requirements are placed on construction ventilation air volume, ventilation technology and ventilation management.

[0003] At present, long tunnels are mostly constructed using the long tunnel short construction method, and construction ventilation mostly uses auxiliary channels. The existing tunnel press-in construction ventilation three-way air duct connection structure is mostly a right-angle connection structure. The air duct is prone to bending at the corners, and the air duct is severely damaged and squeezed when passing through the trolley, which greatly causes wind pressure loss, poor ventilation effect and high energy consumption. Summary of the Invention

[0004] In order to overcome the problems of easy bending at the turning points of existing tunnel push-in construction ventilation ducts, large wind pressure loss, poor ventilation effect and high energy consumption, the purpose of the present invention is to provide an F-type push-in ventilation system with a three-way variable diameter turning duct and a method of use. The system uses multiple horizontal holes to assist ventilation, and adopts an arc-shaped hard duct connection structure on the basis of the existing tunnel three-way soft duct right-angle connection structure, which can effectively reduce wind pressure loss. At the same time, the air volume can be dynamically adjusted according to the construction conditions of the face, with better ventilation effect and lower ventilation cost.

[0005] The technical solution of the present invention is: an F-type push-in ventilation system with a three-way variable diameter turning air duct, including an F-type horizontal tunnel construction area, the F-type horizontal tunnel construction area includes a right tunnel and a left tunnel arranged in parallel, a horizontal passage is provided between the right tunnel and the left tunnel, a horizontal tunnel is provided at the end of the horizontal passage, the right tunnel and the left tunnel are respectively provided with a right tunnel entrance and a left tunnel entrance, a variable frequency axial flow fan I is respectively provided at the right tunnel entrance and the left tunnel entrance, the variable frequency axial flow fan I is connected to a soft air duct I, the outlet of the soft air duct I is facing the direction of the tunnel face I, the right tunnel and the left tunnel are respectively provided with a second lining trolley air duct connection structure, and a horizontal tunnel construction is provided in the horizontal tunnel. The ventilation module of the work area, the ventilation module of the horizontal tunnel construction area includes a variable frequency axial flow fan II provided at the horizontal tunnel outlet, the variable frequency axial flow fan II is connected to the soft air duct II, and the soft air duct II is respectively connected to the soft air duct of the left tunnel, the soft air duct of the horizontal channel and the soft air duct of the right tunnel. The soft air duct II, the soft air duct of the horizontal channel, the soft air duct of the left tunnel and the soft air duct of the right tunnel are F-type pipeline structures. The connection between the soft air duct II and the soft air duct of the left tunnel is provided with a three-way hard air duct connection structure, and the connection between the soft air duct of the horizontal channel and the soft air duct of the right tunnel is provided with a turning arc hard air duct connection structure. The soft air duct of the left tunnel and the soft air duct of the right tunnel are respectively facing the heading face II.

[0006] The three-way rigid air duct connection structure includes an air gate at the connection with the soft air duct of the left tunnel. The air gate is connected in sequence to the left-side turning arc-shaped rigid air duct II, the left-side turning arc-shaped rigid air duct I and the gradual hard air duct I. The left-side turning arc-shaped rigid air duct I is connected to the middle of the gradual hard air duct. One end of the gradual hard air duct I is connected to the soft air duct II, and the other end is connected in sequence to the right-side turning arc-shaped rigid air duct, the gradual hard air duct II, the air gate and the cross-channel soft air duct.

[0007] The damper includes a hard shell, an adjustable damper is arranged inside the hard shell, a motor is fixedly arranged outside the hard shell, an output end of the motor is connected to a driven wheel, and the driven wheel is rotatably connected to the adjustable damper.

[0008] A connection structure between rigid air ducts is provided between the left-side curved rigid air duct II and the left-side curved rigid air duct I. The connection structure between rigid air ducts includes a flange and a fastening nut.

[0009] The diameter of the soft air duct II is 2.4m, the diameter of the soft air duct in the left tunnel is 2m, the diameter of the soft air duct in the cross passage is 2m, and the diameter of the soft air duct in the right tunnel is 2m.

[0010] The turning arc-shaped hard air duct connection structure includes a turning hard arc-shaped air duct, one end of the turning hard arc-shaped air duct is connected to the transverse channel soft air duct, and the other end is connected to the tunnel right hole soft air duct. The connection between the turning hard arc-shaped air duct and the transverse channel soft air duct and the tunnel right hole soft air duct is respectively provided with hard and soft air duct fixing rings.

[0011] The air duct connection structure of the second lining trolley includes an elliptical cross-section rigid air duct, and both ends of the elliptical cross-section rigid air duct are respectively connected to a gradient rigid air duct III, and the gradient rigid air duct III is connected to a soft air duct III. The cross-section of one end of the gradient rigid air duct III connected to the elliptical cross-section rigid air duct is an elliptical cross-section of the air duct, and the cross-section of one end of the gradient rigid air duct III connected to the soft air duct III is a circular cross-section of the air duct. The elliptical cross-section rigid air duct passes through the second lining trolley, and the second lining trolley is arranged along the contour surface of the tunnel. One end of the soft air duct III is connected to the soft air duct of the left tunnel hole or the soft air duct of the right tunnel hole.

[0012] Jet fans are respectively provided at the intersection of the left tunnel and the transverse tunnel, and at the intersection of the right tunnel and the transverse passage.

[0013] The soft air duct I, soft air duct II, cross channel soft air duct, tunnel right hole soft air duct, three-way hard air duct connection structure and turning arc hard air duct connection structure are all hung on the arch of the tunnel contour surface, and the jet fan is hung on the side of the tunnel contour surface.

[0014] A method for using an F-type push-in ventilation system with a three-way variable-diameter curved air duct, using the F-type push-in ventilation system with a three-way variable-diameter curved air duct as described above, is characterized by comprising the following steps:

[0015] S1: There are multiple transverse tunnels on one side of the left tunnel. The exits of the transverse tunnels are connected to one side of the left tunnel. There are multiple transverse passages between the other side of the left tunnel and the right tunnel. A jet fan is installed at the intersection of the right tunnel and the transverse passages, and a jet fan is installed at the intersection of the left tunnel and the transverse tunnel. The variable frequency axial flow fan II is located 30m away from the transverse tunnel entrance.

[0016] S2: The 2.4m diameter soft air duct II in the transverse tunnel and the 2m diameter soft air duct in the left tunnel of the tunnel are connected at the intersection of the left tunnel and the transverse tunnel through a three-way rigid air duct connection structure. Both outlets of the three-way rigid air duct connection structure are equipped with gradual-change rigid air ducts, and the air duct diameter is changed from 2.4m to 2m. After the diameter change, dampers are installed at both interfaces of the three-way rigid air duct connection structure.

[0017] S3: The 2m diameter soft air duct in the right tunnel and the 2m diameter soft air duct II in the transverse passage are connected at the intersection of the right tunnel and the transverse passage through a curved rigid air duct connection structure;

[0018] S4: The 2m diameter soft air duct in the left tunnel and the 2m diameter soft air duct in the right tunnel are connected by a three-way rigid air duct connection structure when passing through the secondary lining trolley. The cross section of the 2m diameter soft air duct III gradually changes from a circular cross section to an elliptical cross section.

[0019] S5: Fresh air from variable-frequency axial fan II is delivered via soft air duct II to the intersection of the left tunnel and the transverse tunnel. Here, soft air duct II connects to the soft air duct and the soft air duct of the right tunnel via a three-way rigid air duct connection structure. The airflow is then delivered to the left tunnel and right tunnel face II, respectively. The left and right tunnels are connected by a transverse passageway, which houses a jet fan. A jet fan is also installed at the intersection of the left tunnel and the transverse tunnel. The entrainment and pressure-boosting effects of the jet fan promote the diffusion of polluted air, thereby improving exhaust efficiency.

[0020] The technical effects of the present invention are: 1. The present invention utilizes multiple horizontal tunnels for auxiliary ventilation, including the left and right tunnel entrance construction areas and multiple horizontal tunnel construction areas, all of which adopt pressurized ventilation with clear division of labor, scientific and efficient, greatly improving the construction ventilation efficiency; 2. The present invention adopts a three-way hard duct connection structure, and adopts an arc-shaped hard duct connection structure on the basis of the existing tunnel three-way soft duct right-angle connection structure, which can effectively reduce the wind pressure loss. At the same time, the interfaces of the three-way hard duct connection structure are all provided with dampers, which can dynamically adjust the air volume according to the construction conditions of the face; 3. When the present invention turns to the main tunnel through the air duct, the arc-shaped hard duct connection is adopted between the soft air ducts, which can effectively solve the wind pressure loss caused by the traditional tunnel air ducts having no arc and multiple bends when turning. Loss problem; 4. The present invention adopts the air duct connection structure of the second lining trolley and the gradual air duct structure to change the circular cross-section of the air duct into an elliptical cross-section. The soft air duct and the hard air duct are connected by a fixed collar, which can effectively solve the wind pressure loss problem caused by the sudden change of the air duct diameter and multiple bends when the existing tunnel air duct passes through the second lining trolley; 5. The present invention adopts a gradual hard air duct structure to connect with the soft air ducts at both ends through the air duct diameter-changing structure, and connects them through fixed collars, which can effectively solve the wind pressure loss problem caused by the sudden change of the diameter of the existing tunnel air duct; 6. The present invention arranges jet fans at the intersection of the right tunnel and the horizontal passage and at the intersection of the left tunnel and the horizontal tunnel. The suction and pressure-raising effects of the jet fans promote the diffusion of polluted air, thereby improving the air environment inside the tunnel.

[0021] The following is a further description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an F-type push-in ventilation system of a three-way variable-diameter curved air duct according to the present invention.

[0023] Figure 2 This is a schematic structural diagram of the horizontal tunnel construction area according to an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the ventilation system structure of the horizontal tunnel construction area according to an embodiment of the present invention.

[0025] Figure 4 Schematic diagram of the three-way rigid air duct connection structure according to an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the connection structure of the curved curved rigid air duct according to an embodiment of the present invention.

[0027] Figure 6 Schematic diagram of the rigid air duct connection structure according to an embodiment of the present invention.

[0028] Figure 7 Schematic diagram of the damper structure according to an embodiment of the present invention.

[0029] Figure 8 Schematic diagram of the air duct connection structure according to an embodiment of the present invention.

[0030] Figure 9 This is a schematic structural diagram of the air duct threading trolley according to an embodiment of the present invention.

[0031] Figure numerals: 1-right tunnel; 2-left tunnel; 3-entrance of left tunnel; 4-entrance of right tunnel; 5-transverse tunnel; 6-transverse passage; 7-F-type transverse tunnel construction area; 8-variable frequency axial flow fan I; 9-soft air duct I; 10-mass face I; 11-variable frequency axial flow fan II; 12-ventilation module of transverse tunnel construction area; 13-second lining trolley air duct connection structure; 14-mass face II; 15-jet fan; 121-soft air duct II; 122-soft air duct of left tunnel; 123-soft air duct of right tunnel; 124-three-way rigid air duct connection structure; 125-curved rigid air duct connection structure; 126-flexible air duct of transverse passage; 1241-air door; 1242-left turning Curved rigid air duct I; 1243-Left-side curved rigid air duct II; 1244-Gradual-change rigid air duct I; 1245-Right-side curved rigid air duct; 1246-Gradual-change rigid air duct II; 1247-Connection structure between rigid air ducts; 1251-Curved rigid air duct; 1252-Fixed collar for rigid and flexible air ducts; 12411-Rigid housing; 12412-Adjustable damper, 12413-Motor, 12414-Driven pulley; 131-Soft air duct III; 132-Gradual-change rigid air duct III; 133-Hard air duct with elliptical cross-section; 134-Oval cross-section of air duct; 135-Circular cross-section of air duct; 136-Second lining trolley; 137-Tunnel profile. Implementation Method

[0032] Example 1 Figures 1 to 3As shown, an F-type push-in ventilation system with a three-way variable diameter turning air duct includes an F-type horizontal tunnel construction area 7, the F-type horizontal tunnel construction area 7 includes a right tunnel 1 and a left tunnel 2 arranged in parallel, a horizontal channel 6 is provided between the right tunnel 1 and the left tunnel 2, a horizontal tunnel 5 is provided at the end of the horizontal channel 6, the right tunnel 1 and the left tunnel 2 are respectively provided with a right tunnel inlet 4 and a left tunnel inlet 3, the right tunnel inlet 4 and the left tunnel inlet 3 are respectively provided with a variable frequency axial flow fan Ⅰ8, the variable frequency axial flow fan Ⅰ8 is connected to a soft air duct Ⅰ9, the outlet of the soft air duct Ⅰ9 is facing the direction of the tunnel face Ⅰ10, the right tunnel 1 and the left tunnel 2 are respectively provided with a second lining trolley air duct connection structure 13, a horizontal tunnel construction area ventilation module 12 is provided in the horizontal tunnel 5, the horizontal tunnel construction area ventilation module 12 includes a variable frequency axial flow fan II11 provided at the outlet of the horizontal tunnel 5, the variable frequency axial flow fan II11 is connected to a soft air duct II121, and the soft air duct II121 is respectively connected to the soft air duct 122 of the left tunnel, the soft air duct 126 of the horizontal channel and the soft air duct 123 of the right tunnel. The soft air duct II121, the soft air duct 126 of the horizontal channel, the soft air duct 122 of the left tunnel and the soft air duct 123 of the right tunnel are F-shaped pipeline structures. A three-way hard air duct connection structure 124 is provided at the connection between the soft air duct II121 and the soft air duct 122 of the left tunnel, and a turning arc hard air duct connection structure 125 is provided at the connection between the soft air duct 126 of the horizontal channel and the soft air duct 123 of the right tunnel. The soft air duct 122 of the left tunnel and the soft air duct 123 of the right tunnel are respectively facing the heading face II14.

[0033] The present invention realizes construction ventilation of a total of four heading faces, namely the left tunnel 2 and the right tunnel 1, through the transverse tunnel 5, and utilizes multiple transverse tunnels 5 for auxiliary ventilation, including the left and right tunnel entrance construction areas and multiple transverse tunnel construction areas, all of which adopt push-in ventilation with clear division of labor, scientific and efficient, greatly improving the construction ventilation efficiency.

[0034] Example 2 Based on Example 1, in this example, Figure 4 As shown, preferably, the three-way rigid air duct connection structure 124 includes a damper 1241 at the connection with the left tunnel soft air duct 122, and the damper 1241 is sequentially connected to the left-side turning arc rigid air duct II 1243, the left-side turning arc rigid air duct I 1242 and the gradient rigid air duct I 1244, the left-side turning arc rigid air duct I 1242 is connected to the middle of the gradient rigid air duct 1244, one end of the gradient rigid air duct I 1244 is connected to the soft air duct II 121, and the other end is sequentially connected to the right-side turning arc rigid air duct 1245, the gradient rigid air duct II 1246, the damper 1241 and the cross-channel soft air duct 126.

[0035] The three-way rigid air duct connection structure 124 of the present invention adopts the curved rigid air duct connection structure of the left-turning curved rigid air duct II 1243, the left-turning curved rigid air duct I 1242 and the gradient rigid air duct I 1244 on the basis of the existing tunnel three-way soft air duct right-angle connection structure, which can effectively reduce the wind pressure loss. At the same time, the interfaces of the three-way rigid air duct connection structure are all provided with dampers 1241, which can dynamically adjust the air volume according to the construction conditions of the face.

[0036] Example 3 Based on Example 1 or Example 2, in this example, Figure 7 As shown, preferably, the damper 1241 includes a hard shell 12411, an adjustable damper 12412 is provided inside the hard shell 12411, a motor 12413 is fixedly provided outside the hard shell 12411, the output end of the motor 12413 is connected to a driven wheel 12414, and the driven wheel 12414 is rotatably connected to the adjustable damper 12412.

[0037] The damper 1241 of the present invention drives the driven wheel 12414 to rotate through the output end of the motor 12413, and further drives the adjustable damper 12412 to rotate, thereby realizing the opening and closing of the internal channel of the hard shell 12411, and the air volume can be dynamically adjusted according to the construction conditions of the face.

[0038] Example 4 Based on Example 1 or Example 3, in this example, Figure 6 As shown, preferably, a rigid air duct connection structure 1247 is provided between the left-side curved rigid air duct II 1243 and the left-side curved rigid air duct I 1242, and the rigid air duct connection structure 1247 includes a flange and a fastening nut.

[0039] The connection structure 1247 between the rigid air ducts described in the present invention includes a flange and a fastening nut, and the flange connection structure can achieve quick connection and disassembly.

[0040] Example 5 Based on Example 1 or Example 4, in this example, preferably, the diameter of the soft air duct II 121 is 2.4m, the diameter of the soft air duct 122 of the left tunnel is 2m, the diameter of the horizontal channel soft air duct 126 is 2m, and the diameter of the soft air duct 123 of the right tunnel is 2m.

[0041] The diameter of the soft air duct II 121 described in the present invention is 2.4m, the diameter of the soft air duct 122 of the left tunnel is 2m, the diameter of the soft air duct 126 of the horizontal channel is 2m, and the diameter of the soft air duct 123 of the right tunnel is 2m. The large-diameter air supply in the soft air duct II 121 can effectively meet the air supply needs of the soft air duct 122 of the left tunnel and the soft air duct 123 of the right tunnel.

[0042] Example 6 Based on Example 1 or Example 5, in this example, Figure 5 As shown, preferably, the turning arc-shaped hard air duct connection structure 125 includes a turning hard arc-shaped air duct 1251, one end of the turning hard arc-shaped air duct 1251 is connected to the transverse channel soft air duct 126, and the other end is connected to the tunnel right hole soft air duct 123, and the connection between the turning hard arc-shaped air duct 1251 and the transverse channel soft air duct 126 and the tunnel right hole soft air duct 123 is respectively provided with hard and soft air duct fixing rings 1252.

[0043] When the air duct turns to the main tunnel, the present invention adopts a curved hard air duct connection structure 125 between the soft air ducts, which can effectively solve the problem of wind pressure loss caused by multiple bends without arc when the existing tunnel air duct turns.

[0044] Example 7 Based on Example 1 or Example 6, in this example, Figure 8 、 Figure 9 As shown, preferably, the second lining trolley air duct connection structure 13 includes an elliptical cross-section hard air duct 133, and the two ends of the elliptical cross-section hard air duct 133 are respectively connected to a gradient hard air duct III 132, and the gradient hard air duct III 132 is connected to a soft air duct III 131. The cross-section of one end of the gradient hard air duct III 132 connected to the elliptical cross-section hard air duct 133 is an elliptical cross-section of the air duct 134, and the cross-section of one end of the gradient hard air duct III 132 connected to the soft air duct III 131 is a circular cross-section of the air duct 135. The elliptical cross-section hard air duct 133 passes through the second lining trolley 136, and the second lining trolley 136 is arranged along the tunnel contour surface 137. One end of the soft air duct III 131 is connected to the soft air duct 122 of the left tunnel or the soft air duct 123 of the right tunnel.

[0045] The secondary lining trolley air duct connection structure 13 of the present invention changes the circular cross-section of the air duct into an elliptical cross-section through a gradual air duct structure. The soft air duct and the hard air duct are connected by a fixed ring, which can effectively solve the problem of wind pressure loss caused by sudden changes in the air duct diameter and multiple bends when the traditional tunnel air duct passes through the secondary lining trolley.

[0046] Example 8 Based on Example 1 or Example 7, in this example, Figure 1 As shown, preferably, jet fans 15 are respectively provided at the intersection of the left tunnel 2 and the transverse tunnel 5, and at the intersection of the right tunnel 1 and the transverse passage 6.

[0047] The present invention provides jet fans 15 at the intersection of the left tunnel 2 and the transverse tunnel 5, and at the intersection of the right tunnel 1 and the transverse passage 6. The entrainment and pressure-raising effects of the jet fans 15 promote the diffusion of polluted air, thereby improving the exhaust efficiency of polluted air.

[0048] Example 9 Based on Example 1 or Example 8, in this example, Figure 1 As shown, preferably, the soft air duct I9, the soft air duct II 121, the transverse channel soft air duct 126, the tunnel right hole soft air duct 123, the three-way hard air duct connection structure 124 and the turning arc hard air duct connection structure 125 are all suspended on the arch of the tunnel contour surface 137, and the jet fan 15 is suspended on the side of the tunnel contour surface 137.

[0049] The soft air duct I9, soft air duct II 121, horizontal channel soft air duct 126, tunnel right hole soft air duct 123, three-way hard air duct connection structure 124 and turning arc hard air duct connection structure 125 described in the present invention are all suspended on the arch of the tunnel contour surface 137, and the jet fan 15 is suspended on the side of the tunnel contour surface 137, which is conducive to making full use of the narrow space in the tunnel.

[0050] The use steps of the present invention are specifically as follows:

[0051] S1: Multiple transverse tunnels 5 are provided on one side of the left tunnel 2. The exit of the transverse tunnel 5 is connected to one side of the left tunnel 2. Multiple transverse passages 6 are provided between the other side of the left tunnel 2 and the right tunnel 1. A jet fan 15 is provided at the intersection of the right tunnel and the transverse passages, and a jet fan 15 is provided at the intersection of the left tunnel and the transverse tunnel. The variable frequency axial flow fan II 11 is located 30m away from the entrance of the transverse tunnel 5.

[0052] S2: The 2.4m diameter soft air duct II 121 of the horizontal tunnel 5 and the 2m diameter soft air duct 122 of the left tunnel 2 are connected at the intersection of the left tunnel and the horizontal tunnel through a three-way rigid air duct connection structure 124. The two outlets of the three-way rigid air duct connection structure 124 are both equipped with gradual-change rigid air ducts 1246, and the air duct diameter is changed from 2.4m to 2m. After the diameter change, dampers 1241 are installed at the two interfaces of the three-way rigid air duct connection structure 124.

[0053] S3: The 2m diameter soft air duct 123 in the right tunnel and the 2m diameter soft air duct II 121 in the transverse passage 6 are connected at the intersection of the right tunnel and the transverse passage by a curved hard air duct connection structure 125;

[0054] S4: The 2m diameter soft air duct 122 in the left tunnel and the 2m diameter soft air duct 123 in the right tunnel are connected by a three-way hard air duct connection structure 124 when passing through the secondary lining trolley 13. The 2m diameter soft air duct III 131 gradually changes from a circular cross-section to an elliptical cross-section.

[0055] S5: Fresh air from variable-frequency axial fan II 11 is delivered via soft air duct II 121 to the intersection of left tunnel 2 and transverse tunnel 5. Here, soft air duct II 121 connects to soft air duct 122 and right tunnel soft air duct 123 via a three-way rigid duct connection structure 124. From there, the airflow is delivered to tunnel faces II 14 of left tunnel 2 and right tunnel 1, respectively. Left tunnel 2 and right tunnel 1 are connected by a transverse passage 6, which houses a jet fan 15. A jet fan 15 is also installed at the intersection of left tunnel 2 and transverse tunnel 5. The entrainment and pressure-raising effects of jet fan 15 promote the diffusion of polluted air, improving exhaust efficiency.

[0056] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A method for using an F-type push-in ventilation system with a three-way variable diameter curved air duct, characterized by: An F-type forced-in ventilation system using a three-way variable-diameter turning air duct comprises an F-type transverse tunnel construction area (7), wherein the F-type transverse tunnel construction area (7) comprises a right tunnel (1) and a left tunnel (2) arranged in parallel, a transverse passage (6) being provided between the right tunnel (1) and the left tunnel (2), a transverse hole (5) being provided at the end of the transverse passage (6), the right tunnel (1) and the left tunnel (2) being provided with a right tunnel inlet (4) and a left tunnel inlet (3), respectively, a variable-frequency axial flow fan I (8) being provided at the right tunnel inlet (4) and the left tunnel inlet (3), respectively, the variable-frequency axial flow fan I (8) being connected to a soft air duct I (9), and the soft air duct I (9) being provided with a variable-frequency axial flow fan I (8) The outlet faces the tunnel face I (10), and the right tunnel (1) and the left tunnel (2) are respectively provided with a second lining trolley air duct connection structure (13). The horizontal tunnel (5) is provided with a horizontal tunnel construction area ventilation module (12), and the horizontal tunnel construction area ventilation module (12) includes a variable frequency axial flow fan II (11) provided at the outlet of the horizontal tunnel (5), and the variable frequency axial flow fan II (11) is connected to a soft air duct II (121), and the soft air duct II (121) is respectively connected to the soft air duct (122) of the left tunnel, the soft air duct (126) of the horizontal channel, and the soft air duct (123) of the right tunnel. 122) and the right tunnel soft air duct (123) are in an F-shaped pipe structure. A three-way hard air duct connection structure (124) is provided at the connection between the soft air duct II (121) and the left tunnel soft air duct (122). A turning arc hard air duct connection structure (125) is provided at the connection between the cross channel soft air duct (126) and the right tunnel soft air duct (123). The left tunnel soft air duct (122) and the right tunnel soft air duct (123) are respectively oriented toward the tunnel face II (14). The three-way hard air duct connection structure (124) includes an air door (1241) at the connection with the left tunnel soft air duct (122). The air door (1241) is connected in sequence to the left turning arc hard air duct. Ⅱ (1243), a left-side curved hard air duct Ⅰ (1242) and a gradient hard air duct Ⅰ (1244), wherein the left-side curved hard air duct Ⅰ (1242) is connected to the middle of the gradient hard air duct Ⅰ (1244), one end of the gradient hard air duct Ⅰ (1244) is connected to the soft air duct Ⅱ (121), and the other end is sequentially connected to the right-side curved hard air duct (1245), the gradient hard air duct Ⅱ (1246), the damper (1241) and the transverse channel soft air duct (126), and jet fans (15) are respectively provided at the intersection of the left tunnel (2) and the transverse tunnel (5) and at the intersection of the right tunnel (1) and the transverse channel (6). When in use, the following steps are included: S1: A plurality of transverse tunnels (5) are provided on one side of the left tunnel (2), the outlet of the transverse tunnel (5) is connected to one side of the left tunnel (2), a plurality of transverse passages (6) are provided between the other side of the left tunnel (2) and the right tunnel (1), a jet fan (15) is provided at the intersection of the right tunnel and the transverse passage, a jet fan (15) is provided at the intersection of the left tunnel and the transverse tunnel, and a variable frequency axial flow fan II (11) is located 30 m away from the inlet of the transverse tunnel (5); S2: The soft air duct II (121) with an inner diameter of 2.4m in the horizontal tunnel (5) and the soft air duct (122) with an inner diameter of 2m in the left tunnel (2) are connected at the intersection of the left tunnel and the horizontal tunnel through a three-way rigid air duct connection structure (124). A gradual hard air duct II (1246) is set at the right outlet of the three-way rigid air duct connection structure (124). The diameter of the air duct is changed from 2.4m to 2m. After the diameter change is completed, air dampers (1241) are set at the two interfaces of the three-way rigid air duct connection structure (124); S3: The right tunnel soft air duct (123) with a diameter of 2m in the right tunnel and the soft air duct II (121) with a diameter of 2m in the transverse passage (6) are connected at the intersection of the right tunnel and the transverse passage through a curved hard air duct connection structure (125); S4: The 2m diameter soft air duct (122) in the left tunnel and the 2m diameter soft air duct (123) in the right tunnel are connected by a three-way hard air duct connection structure (124) when passing through the secondary lining trolley. The 2m diameter soft air duct III (131) gradually changes from a circular cross section to an elliptical cross section. S5: The fresh air output by the variable frequency axial flow fan II (11) is sent to the intersection of the left tunnel (2) and the horizontal tunnel (5) through the soft air duct II (121). Here, the soft air duct II (121) is connected to the soft air duct (122) and the soft air duct (123) of the right tunnel through the three-way hard air duct connection structure (124). The air flow is sent to the tunnel left tunnel (2) and the tunnel right tunnel (1) face II (14) respectively. The left tunnel (2) and the right tunnel (1) are connected through the transverse passage (6). A jet fan (15) is installed in the transverse passage (6). A jet fan (15) is installed at the intersection of the left tunnel (2) and the horizontal tunnel (5). The entrainment and pressure-raising effects of the jet fan (15) promote the diffusion of polluted air, thereby improving the exhaust efficiency of polluted air.

2. The method for using the F-type push-in ventilation system of the three-way variable diameter curved air duct according to claim 1, characterized in that: The damper (1241) comprises a hard shell (12411), an adjustable damper (12412) is provided inside the hard shell (12411), a motor (12413) is fixedly provided outside the hard shell (12411), an output end of the motor (12413) is connected to a driven wheel (12414), and the driven wheel (12414) is rotatably connected to the adjustable damper (12412).

3. The method for using the F-type push-in ventilation system of the three-way variable diameter curved air duct according to claim 1 is characterized by: A rigid air duct connection structure (1247) is provided between the left-side curved rigid air duct II (1243) and the left-side curved rigid air duct I (1242), and the rigid air duct connection structure (1247) includes a flange and a fastening nut.

4. The method for using the F-type push-in ventilation system of the three-way variable diameter curved air duct according to claim 1 is characterized by: The diameter of the soft air duct II (121) is 2.4 m, the diameter of the soft air duct (122) in the left tunnel is 2 m, the diameter of the soft air duct (126) in the transverse passage is 2 m, and the diameter of the soft air duct (123) in the right tunnel is 2 m.

5. The method for using the F-type push-in ventilation system of the three-way variable diameter curved air duct according to claim 1 is characterized by: The turning arc-shaped hard air duct connection structure (125) comprises a turning hard arc-shaped air duct (1251), one end of the turning hard arc-shaped air duct (1251) is connected to the transverse channel soft air duct (126), and the other end is connected to the tunnel right hole soft air duct (123), and hard and soft air duct fixing rings (1252) are respectively provided at the connection points between the turning hard arc-shaped air duct (1251) and the transverse channel soft air duct (126) and the tunnel right hole soft air duct (123).

6. The method for using the F-type push-in ventilation system of the three-way variable diameter curved air duct according to claim 1, characterized in that: The second lining trolley air duct connection structure (13) includes an elliptical cross-section hard air duct (133), and the two ends of the elliptical cross-section hard air duct (133) are respectively connected to a gradient hard air duct III (132), and the gradient hard air duct III (132) is connected to a soft air duct III (131). The cross section of one end of the gradient hard air duct III (132) connected to the elliptical cross-section hard air duct (133) is an elliptical cross-section of the air duct (134), and the cross section of one end of the gradient hard air duct III (132) connected to the soft air duct III (131) is a circular cross-section of the air duct (135). The elliptical cross-section hard air duct (133) passes through the second lining trolley (136), and the second lining trolley (136) is arranged along the tunnel contour surface (137). One end of the soft air duct III (131) is connected to the soft air duct (122) of the left tunnel or the soft air duct (123) of the right tunnel.

7. The method for using the F-type push-in ventilation system of the three-way variable diameter curved air duct according to claim 1, characterized in that: The soft air duct I (9), soft air duct II (121), transverse channel soft air duct (126), right tunnel soft air duct (123), three-way hard air duct connection structure (124) and curved hard air duct connection structure (125) are all suspended on the arch of the tunnel contour surface (137), and the jet fan (15) is suspended on the side of the tunnel contour surface (137).

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