A combined relay pressure-in and laneway ventilation system

Abstract

The invention discloses a relay push-in type and laneway type combined ventilation system, comprising a left tunnel, a right tunnel, an air supply inclined shaft, an exhaust inclined shaft, an air duct isolation device, a variable frequency axial flow fan, a first explosion-proof variable frequency axial flow fan, a second explosion-proof variable frequency axial flow fan, a first air duct, a second air duct and a third air duct. The system has good ventilation effect and low ventilation cost.

Description

Technical Field

[0001] The invention relates to a ventilation system, in particular to a relay push-in type and lane type combined ventilation system. Background Art

[0002] Due to the complex construction environment characteristics of ultra-long and long span gas tunnels, such as large tunnel section, long air supply distance, long construction period, many construction machinery and equipment personnel, and gas-containing strata when crossing coal and non-coal gas strata, higher requirements are put forward for construction ventilation air volume, ventilation technology and ventilation management. Existing ventilation schemes such as pressure-in, tunnel, and jet tunnel have high construction costs, high requirements for wind wall 6 construction, poor ventilation effect, and high energy consumption. Highway tunnel construction ventilation control technology combining inclined shaft and cross passage 5 is a new type of construction ventilation technology developed on the basis of traditional construction ventilation technology. Summary of the invention

[0003] The purpose of the present invention is to overcome the disadvantages of the prior art and provide a combined relay push-in and laneway ventilation system, which has better ventilation effect and lower ventilation cost.

[0004] To achieve the above-mentioned purpose, the relay-type and lane-type combined ventilation system of the present invention comprises a left tunnel, a right tunnel, an air supply inclined shaft, an exhaust inclined shaft, an air duct isolation device, a variable frequency axial flow fan, a first explosion-proof variable frequency axial flow fan, a second explosion-proof variable frequency axial flow fan, a first air duct, a second air duct and a third air duct;

[0005] The outlet of the air supply inclined shaft is connected to one side of the left tunnel, a number of transverse passages are arranged between the other side of the left tunnel and the right tunnel, and the exhaust inclined shaft is connected to the right tunnel;

[0006] The left tunnel and the right tunnel are connected through the first transverse passage, and a wind wall is arranged in the remaining transverse passages. The first explosion-proof variable frequency axial flow fan and the second explosion-proof variable frequency axial flow fan are located between the air supply inclined shaft and the first transverse passage, and the first explosion-proof variable frequency axial flow fan and the second explosion-proof variable frequency axial flow fan are both located in the left tunnel;

[0007] The inlet of the first air duct is connected to the outlet of the variable frequency axial flow fan, the outlet of the first air duct passes through the air supply inclined shaft and extends into the left tunnel, and the outlet of the first air duct is located at the inlet side of the first explosion-proof variable frequency axial flow fan and the second explosion-proof variable frequency axial flow fan;

[0008] The second air duct is located in the left tunnel, and the inlet of the second air duct is connected to the outlet of the first explosion-proof variable frequency axial flow fan, the inlet of the third air duct is connected to the outlet of the second explosion-proof variable frequency axial flow fan, and the outlet of the third air duct passes through the first transverse passage and extends into the right tunnel;

[0009] The first air duct is located on one side of the first explosion-proof variable frequency axial flow fan and the second explosion-proof variable frequency axial flow fan, and the second air duct and the third air duct are located on the other side of the first explosion-proof variable frequency axial flow fan and the second explosion-proof variable frequency axial flow fan.

[0010] Explosion-proof jet fans are installed in the right tunnel and the exhaust shaft.

[0011] The air supply inclined shaft and exhaust inclined shaft are both Y-shaped structures.

[0012] The distance between the variable frequency axial flow fan and the air supply inclined shaft is 30m.

[0013] The inner diameter of the first air duct is 1.8 m.

[0014] The cross-sections of the left tunnel and the right tunnel are three-star arch structures.

[0015] The cross-section of the inclined air supply shaft, the inclined exhaust shaft and the cross passage is a structure combining straight walls and semicircular arches.

[0016] The hanging heights of the first air duct, the second air duct and the third air duct are greater than or equal to 4.2m.

[0017] The present invention has the following beneficial effects:

[0018] During the specific operation of the relay pressure-in and tunnel-type combined ventilation system described in the present invention, the fresh air output by the variable frequency axial flow fan is sent to the front side of the first explosion-proof variable frequency axial flow fan and the second explosion-proof variable frequency axial flow fan through the first air duct, the fresh air output by the first explosion-proof variable frequency axial flow fan is passed into the left tunnel through the second air duct, and the fresh air output by the second explosion-proof variable frequency axial flow fan is passed into the right tunnel through the third air duct, and the polluted air in the left tunnel enters the exhaust inclined shaft through the first horizontal channel; the polluted air in the right tunnel directly enters the exhaust inclined shaft, so as to realize the relay pressure-in and tunnel-type combined ventilation, with better ventilation effect, simple structure and low ventilation cost.

[0019] Furthermore, the dirty air is jetted by an explosion-proof jet fan to improve the exhaust efficiency of the dirty air. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Among them, 1 is the left tunnel, 2 is the right tunnel, 3 is the air supply inclined shaft, 4 is the exhaust inclined shaft, 5 is the horizontal passage, 6 is the wind wall, 7 is the air duct isolation device, 8 is the variable frequency axial flow fan, 9 is the first explosion-proof variable frequency axial flow fan, 10 is the second explosion-proof variable frequency axial flow fan, 11 is the explosion-proof jet fan, 121 is the first air duct, 122 is the second air duct, and 123 is the third air duct. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only an embodiment of a part of the present invention, not all embodiments, and is not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0023] The accompanying drawings show schematic diagrams of structures according to embodiments disclosed in the present invention. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0024] refer to Figure 1 The relay-type and laneway-type combined ventilation system of the present invention comprises a left tunnel 1, a right tunnel 2, an air supply inclined shaft 3, an exhaust inclined shaft 4, air duct isolation devices 7 and 8, which are variable frequency axial flow fans 8, a first explosion-proof variable frequency axial flow fan 9, a second explosion-proof variable frequency axial flow fan 10, an explosion-proof jet fan 11, a first air duct 121, a second air duct 122 and a third air duct 123;

[0025] The outlet of the air supply inclined shaft 3 is connected to one side of the left tunnel 1, and a plurality of transverse passages 5 are arranged between the other side of the left tunnel 1 and the right tunnel 2, and the exhaust inclined shaft 4 is connected to the right tunnel 2;

[0026] The left tunnel 1 is connected to the right tunnel 2 through the first transverse passage 5, and a wind wall 6 is arranged in the remaining transverse passage 5. The first explosion-proof variable frequency axial flow fan 9 and the second explosion-proof variable frequency axial flow fan 10 are located between the air supply inclined shaft 3 and the first transverse passage 5, and the first explosion-proof variable frequency axial flow fan 9 and the second explosion-proof variable frequency axial flow fan 10 are both located in the left tunnel 1;

[0027] Explosion-proof jet fans 11 are installed in the right tunnel 2 and the exhaust shaft 4 to help and guide the discharge of polluted air in the left tunnel 1 and the right tunnel 2 to prevent gas accumulation;

[0028] The inlet of the first air duct 121 is connected to the outlet of the variable frequency axial flow fan 8, and the outlet of the first air duct 121 extends into the left tunnel 1 through the air supply inclined shaft 3, and the outlet of the first air duct 121 is located at the inlet side of the first explosion-proof variable frequency axial flow fan 9 and the second explosion-proof variable frequency axial flow fan 10;

[0029] The second air duct 122 is located in the left tunnel 1, and the inlet of the second air duct 122 is connected to the outlet of the first explosion-proof variable frequency axial flow fan 9, the inlet of the third air duct 123 is connected to the outlet of the second explosion-proof variable frequency axial flow fan 10, and the outlet of the third air duct 123 passes through the first transverse passage 5 and extends into the right tunnel 2;

[0030] The first air duct 121 is located on one side of the first explosion-proof variable frequency axial flow fan 9 and the second explosion-proof variable frequency axial flow fan 10 , and the second air duct 122 and the third air duct 123 are located on the other side of the first explosion-proof variable frequency axial flow fan 9 and the second explosion-proof variable frequency axial flow fan 10 .

[0031] The inclined air supply shaft 3 and the inclined air exhaust shaft 4 are both Y-shaped structures.

[0032] The distance between the variable frequency axial flow fan 8 and the air supply inclined shaft 3 is 30m, and the inner diameter of the first air duct 121 is 1.8m;

[0033] The cross sections of the left tunnel 1 and the right tunnel 2 are three-star arch structures, and the cross sections of the air supply inclined shaft 3, the exhaust inclined shaft 4 and the cross passage 5 are structures combining straight walls and semicircular arches;

[0034] The hanging height of the first air duct 121, the second air duct 122 and the third air duct 123 is greater than or equal to 4.2 m. The first air duct 121, the second air duct 122 and the third air duct 123 should turn slowly and increase the curvature radius of the turn as much as possible.

[0035] An air duct isolation device 7 is provided in the left tunnel 1, wherein the air duct isolation device 7 is located between the first transverse channel 5 and the first explosion-proof variable frequency axial flow fan 9 and the second explosion-proof variable frequency axial flow fan 10, and a wind wall 6 is provided at the same time to prevent the backflow of polluted air from polluting the fresh air. The construction process of the air duct isolation device 7 is as follows: a 5mm thick iron plate is used for sealing, and the sealing height is 3.5m below the arch, intersecting with the longitudinal angle of the tunnel body at 60 degrees; and a 1.4cm thick 20cm*20cm steel plate is embedded on both sides of the second lining at 3.5m below the arch, and the two ends of the No. 10 I-beam crossbeam are welded to the embedded steel plate of the second lining, and the I-beam crossbeam is connected horizontally with a 4cm wide and 8mm thick flat steel; a 4cm wide and 8mm thick flat steel is used in the circumferential direction and fixed to the concrete surface of the second lining with expansion bolts, and the gap between the flat steel and the second lining concrete is blocked to prevent the return air and polluted air from flowing into the main tunnel entrance operation area, and the steel plate and the flat steel are fully welded and sealed locally with sealant.

[0036] The specific working process of the present invention is:

[0037] The fresh air output by the variable frequency axial flow fan 8 is sent to the front side of the first explosion-proof variable frequency axial flow fan 9 and the second explosion-proof variable frequency axial flow fan 10 through the first air duct 121, the fresh air output by the first explosion-proof variable frequency axial flow fan 9 is passed into the left tunnel 1 through the second air duct 122, and the fresh air output by the second explosion-proof variable frequency axial flow fan 10 is passed into the right tunnel 2 through the third air duct 123, and the polluted air in the left tunnel 1 enters the exhaust inclined shaft 4 through the first horizontal channel 5; the polluted air in the right tunnel 2 directly enters the exhaust inclined shaft 4, and at the same time, the polluted air is jetted by the explosion-proof jet fan 11 to improve the exhaust efficiency of the polluted air.

Claims

1. A combined relay push-in and laneway ventilation system, characterized in that: It comprises a left tunnel (1), a right tunnel (2), an air supply inclined shaft (3), an air exhaust inclined shaft (4), a variable frequency axial flow fan (8), a first explosion-proof variable frequency axial flow fan (9), a second explosion-proof variable frequency axial flow fan (10), a first air duct (121), a second air duct (122) and a third air duct (123); The outlet of the air supply inclined shaft (3) is connected to one side of the left tunnel (1), a plurality of transverse passages (5) are provided between the other side of the left tunnel (1) and the right tunnel (2), and the exhaust inclined shaft (4) is connected to the right tunnel (2); The left tunnel (1) and the right tunnel (2) are connected via a first transverse passage (5), a wind wall (6) is provided in the remaining transverse passages (5), a first explosion-proof variable frequency axial flow fan (9) and a second explosion-proof variable frequency axial flow fan (10) are located between the air supply inclined shaft (3) and the first transverse passage (5), and the first explosion-proof variable frequency axial flow fan (9) and the second explosion-proof variable frequency axial flow fan (10) are both located in the left tunnel (1); The inlet of the first air duct (121) is connected to the outlet of the variable frequency axial flow fan (8), the outlet of the first air duct (121) passes through the air supply inclined shaft (3) and extends into the left tunnel (1), and the outlet of the first air duct (121) is located at the inlet side of the first explosion-proof variable frequency axial flow fan (9) and the second explosion-proof variable frequency axial flow fan (10); The second air duct (122) is located in the left tunnel (1), and the inlet of the second air duct (122) is connected to the outlet of the first explosion-proof variable frequency axial flow fan (9), the inlet of the third air duct (123) is connected to the outlet of the second explosion-proof variable frequency axial flow fan (10), and the outlet of the third air duct (123) passes through the first transverse passage (5) and then extends into the right tunnel (2); The first air duct (121) is located on one side of the first explosion-proof variable frequency axial flow fan (9) and the second explosion-proof variable frequency axial flow fan (10), and the second air duct (122) and the third air duct (123) are located on the other side of the first explosion-proof variable frequency axial flow fan (9) and the second explosion-proof variable frequency axial flow fan (10); An air duct isolation device (7) is provided in the left tunnel (1), wherein the air duct isolation device (7) is located between the first transverse passage (5) and the first explosion-proof variable frequency axial flow fan (9) and the second explosion-proof variable frequency axial flow fan (10), and a wind wall (6) is also provided.

2. The combined relay push-in and laneway ventilation system according to claim 1 is characterized in that: Explosion-proof jet fans (11) are provided in the right tunnel (2) and the exhaust inclined shaft (4).

3. The combined relay push-in and laneway ventilation system according to claim 1 is characterized in that: The air supply inclined shaft (3) and the air exhaust inclined shaft (4) are both Y-shaped structures.

4. The combined relay push-in and laneway ventilation system according to claim 1 is characterized in that: The distance between the variable frequency axial flow fan (8) and the air supply inclined shaft (3) is 30 m.

5. The combined relay push-in and laneway ventilation system according to claim 1 is characterized in that: The inner diameter of the first air duct (121) is 1.8 m.

6. The combined relay push-in and laneway ventilation system according to claim 1 is characterized in that: The cross sections of the left tunnel (1) and the right tunnel (2) are three-star arch structures.

7. The combined relay push-in and tunnel ventilation system according to claim 1 is characterized in that: The cross-section of the air supply inclined shaft (3), the exhaust inclined shaft (4) and the transverse passage (5) is a structure combining a straight wall and a semicircular arch.

8. The combined relay push-in and tunnel ventilation system according to claim 1 is characterized in that: The hanging heights of the first air duct (121), the second air duct (122) and the third air duct (123) are greater than or equal to 4.2 m.

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