A ventilation device for small-radius spiral tunnel construction

Abstract

The utility model relates to tunnel ventilation equipment technical field, and disclose a small radius spiral tunnel construction ventilation device, including ventilation pipeline main part, be provided with ventilation fan in ventilation pipeline main part, the side of ventilation fan is driven through the drive motor that is established and is driven, the side of ventilation fan is provided with dust filter assembly for filtering, the below of dust filter assembly is provided with dust collection assembly for dust collection, the utility model discloses the dust filter assembly is set up in ventilation pipeline main part, wherein the dust filter screen in dust filter assembly can filter dust in the airflow that is inhaled through the drive of ventilation fan, and the dust that falls into the bottom collecting bin is collected by the dust falling port, ensure that dust filter screen high -efficient filtration can avoid the dust after filtering again easily return to ventilation pipeline main part, and the safety and reliability are higher, and the use of the user is more convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel ventilation equipment, specifically a ventilation device for small-radius spiral tunnel construction. Background Technology

[0002] Tunnels are engineering structures buried underground, representing a form of human utilization of underground space. Tunnels can be categorized into traffic tunnels, hydraulic tunnels, municipal tunnels, mining tunnels, and military tunnels. To ensure ventilation during tunnel construction, ventilation systems must be installed inside the tunnel to guarantee that workers inside can breathe fresh air.

[0003] A search revealed a Chinese patent publication number, CN 212337339 U, which discloses a tunnel construction ventilation device. The device includes an air inlet pipe, an air inlet fan fixedly connected to the inner wall of the air inlet pipe via a fixed column, a first air supply pipe connected to the air outlet flange of the air inlet pipe, a second air supply pipe slidably connected to the inner wall of the first air supply pipe, and an air outlet pipe connected to the air outlet flange of the second air supply pipe. By configuring the air inlet pipe, air inlet fan, first air supply pipe, second air supply pipe, and air outlet pipe, ventilation can be continuously provided to the tunnel construction site. By incorporating a slider and a groove, the second air supply pipe can slide within the first air supply pipe, facilitating adjustment of the length of the air supply pipe. This ensures that the entire ventilation device maintains uninterrupted ventilation regardless of the weight of the load.

[0004] The tunnel ventilation device in the aforementioned patent still has certain shortcomings. The existing spiral tunnel construction ventilation device has a relatively simple structure. Since a large amount of dust is generated during tunnel construction, common ventilation devices only intercept dust by setting up a filter screen inside the ventilation duct. However, during long-term use, the filter pores on the surface of the filter screen are easily blocked by the accumulated dust, thus gradually losing the filtering and ventilation function. The service life is short, the safety and reliability are not high, and it is not conducive to the use of users. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a small-radius spiral tunnel construction ventilation device. This solves the problems of existing spiral tunnel construction ventilation devices having relatively simple structures, generating a large amount of dust during tunnel construction, and common ventilation devices filtering dust only by intercepting it through filters installed inside the ventilation duct. However, over time, the filter pores on the surface of the filter are easily clogged by accumulated dust, gradually losing their filtering and ventilation function, resulting in a short service life, low safety and reliability, and being unsuitable for user operation.

[0006] This utility model provides the following technical solution: a ventilation device for small-radius spiral tunnel construction, including a ventilation duct body, a ventilation fan is provided inside the ventilation duct body, the side of the ventilation fan is driven by a drive motor, the drive motor is fixedly connected to the inner wall of the ventilation duct body by a fixed bracket, a dust filter assembly for filtering is provided on the side of the ventilation fan, and a dust collection assembly for dust collection is provided below the dust filter assembly.

[0007] The dust filtration assembly includes a dust filter screen inclinedly disposed within the main body of the ventilation duct. A top sliding groove is provided at the top of the main body of the ventilation duct. A limiting connecting rod is horizontally disposed within the top sliding groove. A movable sleeve is slidably disposed on the limiting connecting rod. The bottom end of the movable sleeve is connected to the top of the dust filter screen. A bottom sliding groove is provided on the bottom wall of the ventilation duct. A movable slider is disposed at the bottom end of the dust filter screen. The movable slider is slidably disposed within the bottom sliding groove. A limiting insertion hole is provided on the inner wall of the bottom sliding groove. A limiting insertion rod is vertically disposed on the side of the movable slider. The end of the limiting insertion rod is slidably inserted into the limiting insertion hole. A return spring is sleeved on the limiting insertion rod. One end of the return spring is connected to the rod body of the limiting insertion rod, and the other end of the return spring is connected to the inner wall of the bottom sliding groove.

[0008] The dust collection assembly includes a bottom collection chamber located at the bottom of the ventilation duct body. The bottom wall of the bottom chute is connected to the bottom collection chamber through a dust drop outlet. A first guide plate is provided on the top side wall of the bottom collection chamber.

[0009] Preferred technical solution 1: A second guide plate is provided at the bottom of the first guide plate, and a dust discharge port is provided at the bottom end of the bottom collection chamber.

[0010] Preferred technical solution 2: A closing plate is hinged inside the dust discharge port, and the end of the closing plate is fixedly connected to a fixing bolt threaded into the bottom side of the bottom collection chamber.

[0011] Preferred technical solution three: The dust filter is in the shape of a disc that fits against the inner wall of the ventilation duct body.

[0012] This solution enables the dust filter to better filter the airflow entering the ventilation duct body, and the dust filter to fit more tightly against the inner wall of the ventilation duct body.

[0013] Preferred technical solution four: Both the first guide plate and the second guide plate are inclined downwards and disposed on the top side wall of the bottom collection chamber.

[0014] This design allows dust falling into the bottom collection chamber to be guided along the first and second guide plates, and the second and first guide plates can shield the dust falling into the bottom collection chamber, preventing it from returning to the main body of the ventilation duct.

[0015] Preferred technical solution five: The end of the fixing bolt is provided with a connecting block that facilitates rotation.

[0016] This solution makes it easier for users to rotate the fixing bolts.

[0017] Compared with the prior art, this utility model provides a ventilation device for small-radius spiral tunnel construction, which has the following beneficial effects:

[0018] (1) This utility model has a dust filter assembly installed in the main body of the ventilation duct. The dust filter in the dust filter assembly can filter the dust in the airflow driven by the ventilation fan, thereby accelerating the airflow in the tunnel and filtering the air in the tunnel. The dust filter is tilted and movable in the main body of the ventilation duct, which can make the dust accumulated on the surface of the dust filter fall off quickly and fall into the bottom collection chamber through the dust drop port for collection. This ensures that the dust filter can filter efficiently and prevent the filtered dust from easily returning to the main body of the ventilation duct. It has high safety and reliability and is more convenient for users to use. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the main sectional view of the structure of this utility model;

[0021] Figure 3 For the present utility model Figure 2 Enlarged view of the bottom groove structure;

[0022] Figure 4 For the present utility model Figure 2 Enlarged view of the structure of the dust discharge outlet.

[0023] In the picture:

[0024] 1. Ventilation duct body; 2. Ventilation fan; 3. Drive motor; 4. Mounting bracket; 5. Dust filter assembly; 6. Dust collection assembly;

[0025] 501. Dust filter screen; 502. Top sliding groove; 503. Limiting connecting rod; 504. Moving sliding sleeve; 505. Bottom sliding groove; 506. Moving slider; 507. Limiting insertion hole; 508. Limiting insertion rod; 509. Return spring;

[0026] 601. Bottom collection chamber; 602. Dust drop outlet; 603. First guide plate; 604. Second guide plate; 605. Dust discharge outlet; 606. Closing plate; 607. Fixing bolts. Detailed Implementation

[0027] Please see Figure 1-4 A ventilation device for small-radius spiral tunnel construction includes a ventilation duct body 1, a ventilation fan 2 installed inside the ventilation duct body 1, a drive motor 3 driving the side of the ventilation fan 2, a fixed bracket 4 fixedly connected to the inner wall of the ventilation duct body 1 on the drive motor 3, a dust filter assembly 5 for filtering is installed on the side of the ventilation fan 2, and a dust collection assembly 6 for dust collection is installed below the dust filter assembly 5.

[0028] The dust filter assembly 5 includes a dust filter 501 that is inclinedly disposed in the ventilation duct body 1. A top sliding groove 502 is provided at the top of the ventilation duct body 1. A limiting connecting rod 503 is horizontally disposed in the top sliding groove 502. A movable sliding sleeve 504 is slidably disposed on the limiting connecting rod 503. The bottom end of the movable sliding sleeve 504 is connected to the top of the dust filter 501. A bottom sliding groove 505 is provided on the bottom wall of the ventilation duct body 1. A movable slider 506 is provided at the bottom end of the dust filter 501. The movable slider 506 is slidably disposed in the bottom sliding groove 505.

[0029] A limiting insertion hole 507 is provided on the inner wall of the bottom slide groove 505. A limiting insertion rod 508 is vertically provided on the side of the movable slider 506. The end of the limiting insertion rod 508 is slidably inserted into the limiting insertion hole 507. A return spring 509 is sleeved on the limiting insertion rod 508. One end of the return spring 509 is connected to the rod body of the limiting insertion rod 508, and the other end of the return spring 509 is connected to the inner wall of the bottom slide groove 505.

[0030] The dust collection assembly 6 includes a bottom collection chamber 601 located at the bottom of the ventilation duct body 1. The bottom wall of the bottom chute 505 is connected to the bottom collection chamber 601 through a dust drop outlet 602. A first guide plate 603 is provided on the top side wall of the bottom collection chamber 601, and a second guide plate 604 is provided at the bottom of the first guide plate 603. A dust discharge outlet 605 is provided at the bottom end of the bottom collection chamber 601. A closing plate 606 is hinged inside the dust discharge outlet 605. The end of the closing plate 606 is fixedly connected to the bottom side of the bottom collection chamber 601 by a fixing bolt 607 threaded into it.

[0031] Example 2: The difference between this example and Example 1 is that the dust filter 501 is in the shape of a disc that fits against the inner wall of the ventilation duct body 1.

[0032] This allows the dust filter 501 to better filter the airflow entering the ventilation duct body 1, and the dust filter 501 to fit more tightly against the inner wall of the ventilation duct body 1.

[0033] Example 3: The difference between this example and Example 1 is that the first guide plate 603 and the second guide plate 604 are both inclined downwards and set on the top side wall of the bottom collection chamber 601.

[0034] This allows the dust falling into the bottom collection chamber 601 to be guided along the first guide plate 603 and the second guide plate 604, and the second guide plate 604 and the first guide plate 603 can block the dust falling into the bottom collection chamber 601 to prevent it from returning to the ventilation duct body 1.

[0035] Example 4: The difference between this example and Example 1 is that the end of the fixing bolt 607 is provided with a connecting block that facilitates rotation.

[0036] This makes it easier for users to rotate the fixing bolt 607.

[0037] In this embodiment, the existing spiral tunnel construction ventilation device has a relatively simple structure. Since a large amount of dust is generated during tunnel construction, common ventilation devices only filter dust by intercepting it through a filter screen installed in the ventilation duct. However, during long-term use, the filter pores on the surface of the filter screen are easily blocked by the accumulated dust, thus gradually losing its filtration and ventilation function. It has a short service life, low safety and reliability, and is not conducive to user use.

[0038] In summary, in specific implementation, by installing a ventilation fan 2 inside the ventilation duct body 1, the ventilation fan 2 can rotate under the drive of the drive motor 3, thereby drawing in the airflow entering the ventilation duct body 1 from the front, thus accelerating the airflow rate in the tunnel.

[0039] The dust filter assembly 5 is located in front of the ventilation fan 2. The dust filter 501 in the dust filter assembly 5 can filter the dust contained in the airflow entering the ventilation duct body 1. The bottom end of the dust filter 501 is slidably mounted on the limiting connecting rod 503 through the movable sliding sleeve 504. The bottom end of the dust filter 501 is elastically abutted against the return spring 509 through the movable slider 506.

[0040] When the wind force intermittently entering the main body of the ventilation duct changes, it will push the dust filter 501. Under the action of the return spring 509, the dust filter 501 can shake to a certain extent, so that the dust accumulated on the surface of the dust filter 501 can be shaken off. The fact that the dust filter 501 is inclined inside the main body of the ventilation duct will also accelerate the falling of dust.

[0041] The fallen dust falls into the bottom collection chamber 601 through the dust drop outlet 602. The top of the bottom collection chamber 601 is equipped with a first guide plate 603 and a second guide plate 604, which can further guide the dust and prevent the dust that falls into the bottom of the bottom collection chamber 601 from easily entering the ventilation duct body 1 again under the disturbance of airflow. This makes the collected dust more stable and convenient for users.

Claims

1. A ventilation device for small-radius spiral tunnel construction, comprising a ventilation duct body (1), characterized in that: A ventilation fan (2) is installed inside the ventilation duct body (1). The side of the ventilation fan (2) is driven by a drive motor (3). The drive motor (3) is fixedly connected to the inner wall of the ventilation duct body (1) by a fixed bracket (4). A dust filter assembly (5) for filtering is installed on the side of the ventilation fan (2). A dust collection assembly (6) for dust collection is installed below the dust filter assembly (5). The dust filter assembly (5) includes a dust filter screen (501) inclinedly disposed within the ventilation duct body (1). A top sliding groove (502) is provided at the top of the ventilation duct body (1). A limiting connecting rod (503) is horizontally disposed within the top sliding groove (502). A movable sliding sleeve (504) is slidably disposed on the limiting connecting rod (503). The bottom end of the movable sliding sleeve (504) is connected to the top of the dust filter screen (501). A bottom sliding groove (505) is provided on the bottom wall of the ventilation duct body (1). A movable slider is disposed at the bottom end of the dust filter screen (501). 506), the movable slider (506) is slidably disposed in the bottom slide groove (505), the inner wall of the bottom slide groove (505) is provided with a limiting insertion hole (507), the side of the movable slider (506) is vertically provided with a limiting insertion rod (508), the end of the limiting insertion rod (508) is slidably inserted in the limiting insertion hole (507), a return spring (509) is sleeved on the limiting insertion rod (508), one end of the return spring (509) is connected to the rod body of the limiting insertion rod (508), and the other end of the return spring (509) is connected to the inner wall of the bottom slide groove (505); The dust collection assembly (6) includes a bottom collection chamber (601) disposed at the bottom of the ventilation duct body (1). The bottom wall of the bottom chute (505) is connected to the bottom collection chamber (601) through a dust drop port (602). A first guide plate (603) is disposed on the top side wall of the bottom collection chamber (601).

2. A small radius spiral tunnel construction ventilation device according to claim 1, characterised in that: A second guide plate (604) is provided at the bottom of the first guide plate (603), and a dust discharge port (605) is provided at the bottom end of the bottom collection chamber (601).

3. A small radius spiral tunnel construction ventilation device according to claim 2, characterised in that: A closing plate (606) is hinged inside the dust outlet (605), and the end of the closing plate (606) is fixedly connected to a fixing bolt (607) threaded into the bottom side of the bottom collection chamber (601).

4. A small radius spiral tunnel construction ventilation device according to claim 3, characterised in that: The dust filter (501) is disc-shaped and fits against the inner wall of the ventilation duct body (1).

5. A small radius spiral tunnel construction ventilation device according to claim 4, characterised in that: Both the first guide plate (603) and the second guide plate (604) are inclined downwards and disposed on the top side wall of the bottom collection chamber (601).

6. A small radius spiral tunnel construction ventilation device according to claim 5 wherein: The end of the fixing bolt (607) is provided with a connecting block that facilitates rotation.

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