Tunnel construction ventilation and dust removal device considering environmental protection

Abstract

The utility model relates to the technical field of tunnel ventilation and dust removal, and discloses a tunnel construction ventilation and dust removal device considering environmental protection, which comprises an air pipe and a plurality of branch fans, the air pipe is laid in a tunnel, the branch fans are arranged along the length direction of the air pipe, each fan is provided with a motor, and the motor is connected with the air pipe. One end of the air pipe extends out of the tunnel and is provided with a main fan, and the end, provided with the main fan, of the air pipe is provided with a dust collection box and a filter screen. The branch fans and the main fan are connected through the air pipes, so that a ventilation and dust removal system is formed. During tunnel construction operation, the branch fans suck dust in the tunnel into the air pipes, then the main fan sucks the dust in the air pipes out of the tunnel, and the dust is discharged after being filtered, so that the problem that the dust in the tunnel cannot be discharged during construction in the prior art can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel ventilation and dust removal technology, and more specifically to a tunnel construction ventilation and dust removal device that takes environmental protection into account. Background Technology

[0002] During tunnel construction, the working environment is characterized by enclosed spaces, rapid dust dispersion, and poor ventilation. The concentration of dust generated during construction (mainly composed of silica and metal oxides) often exceeds the limits stipulated in the "Occupational Exposure Limits for Hazardous Factors in the Workplace" (GBZ 2.1-2019). Statistics show that the average concentration of inhalable particulate matter (PM10) in tunnel construction sites can reach 80-150 mg / m³. Long-term exposure to high concentrations of dust increases the incidence of pneumoconiosis among workers by 3-5 times compared to ordinary workers, seriously impacting their health.

[0003] Existing tunnel ventilation systems mostly use jet fans or axial fans for dilution ventilation, but they have the following limitations: ① Unreasonable airflow organization leads to serious dust deposition, especially in long tunnels where a "dust cloud" phenomenon is formed; ② Traditional filtration equipment has an interception efficiency of less than 60% for fine particles below PM2.5, which is difficult to meet the requirements for construction dust control in the "Air Pollution Prevention and Control Action Plan"; ③ The equipment has high energy consumption, with a single unit power usually above 110kW, and the operation and maintenance cost accounts for 12-15% of the total project cost.

[0004] With increasingly stringent environmental regulations, the Air Pollution Prevention and Control Law explicitly requires that construction dust must meet the "Construction Site Dust Emission Standard" (DB11 / 1742-2020), namely, a TSP concentration ≤ 80 μg / m³ (hourly average). Therefore, there is an urgent need to develop a highly efficient and environmentally friendly tunnel ventilation and dust removal device to ensure that the dust content in tunnels meets the requirements for occupational health protection. Utility Model Content

[0005] In view of this, the present invention provides an environmentally friendly tunnel construction ventilation and dust removal device that can quickly and effectively remove dust generated during tunnel construction operations, thus avoiding the problem of excessive dust concentration in the tunnel during construction.

[0006] To achieve the above objectives, this utility model provides an environmentally friendly tunnel construction ventilation and dust removal device, including a duct and a distribution fan. The duct is laid inside the tunnel, and several distribution fans are arranged along the length of the duct. Each fan is equipped with a motor. One end of the duct extends outside the tunnel and is fitted with a main fan. A dust collection box and a filter screen are installed on the end of the duct where the main fan is installed.

[0007] Preferably, the fan includes an impeller and fan blades, with the fan blades circumferentially disposed on the side wall of the impeller.

[0008] Preferably, the fan further includes a housing, on which a fan outer ring is provided, the fan outer ring being arranged around the outer periphery of the fan blades and not in contact with the fan blades.

[0009] Preferably, the filter screen is a multi-layer textile fiber filter screen.

[0010] Preferably, the filter screen is installed between the air duct and the main fan, and the dust collection box is installed below the filter screen.

[0011] Preferably, the main fan includes an outer ring and an inner ring of the main fan, which are arranged from the outside to the inside. The inner ring of the main fan is provided with one first fan, and four second fans are arranged in a circumferential array between the inner ring and the outer ring of the main fan.

[0012] Preferably, a connecting rod is provided between the inner ring and the outer ring of the main fan, and the connecting rod divides the annular area between the inner ring and the outer ring of the main fan into four segments, and the four second fans are respectively arranged in the four annular segments.

[0013] Preferably, the dust collection box is a steel structure.

[0014] As can be seen from the above technical solution, compared with the prior art, the environmentally friendly tunnel construction ventilation and dust removal device provided by this utility model connects the branch fan and the main fan through the air duct to form a ventilation and dust removal system. When tunnel construction is underway, the branch fan sucks the dust in the tunnel into the air duct, and then the main fan sucks the dust in the air duct out of the tunnel. When passing through the filter screen, the dust is blocked and filtered and stored in the dust collection box. Then, the environmentally compliant air is discharged to the outside, which can greatly reduce the inhalable particulate matter in the basement, and enable the timely and efficient discharge of dust in the tunnel during construction, so as to protect the health of the workers and the environment in the tunnel. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is an overall structural diagram of the environmentally friendly tunnel construction ventilation and dust removal device of this utility model.

[0017] Figure 2 This is a structural diagram of the fan of this utility model;

[0018] Figure 3 This is a structural diagram of the main fan of this utility model.

[0019] Explanation of reference numerals in the attached diagram: 100-Dust duct, 200-Sub-fan, 300-Dust collection box, 400-Filter screen, 500-Main fan, 600-Motor, 210-Sub-fan outer ring, 220-Fan blade, 230-Impeller shaft, 510-Main fan outer ring, 520-Connecting rod, 530-Main fan inner ring, 540-Second fan, 550-First fan. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of an exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Please see the appendix Figure 1-3 This utility model discloses an environmentally friendly tunnel construction ventilation and dust removal device.

[0022] like Figure 1 As shown, the environmentally friendly tunnel construction ventilation and dust removal device provided by this utility model includes a duct 100, a branch fan 200, a dust collection box 300, a filter screen 400, a main fan 500, and a motor 600.

[0023] The duct 100 is laid inside the tunnel. Several branch fans 200 are arranged along the length of the duct 100. Each branch fan 200 is installed in areas requiring dust suppression and ventilation. Each fan is equipped with a motor 600. A main fan 500 is installed at one end of the duct 100 extending outside the tunnel. A dust collection box 300 and a filter screen 400 are installed at the end of the duct 100 where the main fan 500 is mounted. Specifically, the filter screen 400 is installed at the front end of the main fan 500. The dust collection box 300 is a steel structure installed below the filter screen 400 and is used to store the dust blocked by the filter screen 400. Preferably, the filter screen 400 is a multi-layer textile fiber filter.

[0024] like Figure 1As shown, the fan 200 includes a fan outer ring 210, an impeller 230, and fan blades 220. The fan blades 220 are circumferentially disposed on the side wall of the impeller 230, and the fan blades 220 are fan-shaped structures. The impeller 230 serves as a fixing structure for the fan blades 220, and the fan outer ring 210 serves as a protective structure. The fan outer ring 210 is disposed on the outer casing of the fan 200, and the fan outer ring 210 is disposed around the outer periphery of the fan blades 220 but does not contact the fan blades 220.

[0025] like Figure 3 As shown, the main fan 500 includes an outer ring 510, an inner ring 530, one first fan 550, and four second fans 540. The outer ring 510 and the inner ring 530 are nested from the outside in. The first fan 550 is fixed inside the inner ring 530, and the four second fans 540 are arranged in a circumferential array and fixed within the annular area between the inner ring 530 and the outer ring 510. One first fan 550 is located within the inner ring 530.

[0026] The inner ring 530 and the outer ring 510 of the main fan are connected by a connecting rod 520. The connecting rod 520 divides the annular area between the inner ring 530 and the outer ring 510 of the main fan into four segments, and the four second fans 540 are respectively arranged in the four annular segments.

[0027] The tunnel construction ventilation and dust removal device provided by this utility model connects the branch fan 200 and the main fan 500 through the air duct 100 to form a ventilation and dust removal system. The branch fan 200 draws dust from the tunnel into the air duct 100, and then the main fan 500 draws the dust from the air duct 100 out of the tunnel. When the dust passes through the filter screen 400, it is blocked and filtered and stored in the dust collection box 300. Then, the environmentally compliant air is discharged to the outside. This can greatly reduce the inhalable particulate matter in the basement and solve the problem of affecting the health of workers and the environment.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Furthermore, it should be noted that unless otherwise specified, the specific structures, connections, positions, power sources, etc. involved in this utility model are all things that a person skilled in the art can know without creative effort based on the prior art.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ventilation and dust removal device for tunnel construction that takes environmental protection into consideration, characterized in that, It includes a duct (100) and a distributor fan (200). The duct (100) is laid inside the tunnel. Several distributor fans (200) are arranged along the length of the duct (100). Each fan is equipped with a motor (600). One end of the duct (100) extends to the outside of the tunnel and is equipped with a main fan (500). A dust collection box (300) and a filter screen (400) are installed on the end of the duct (100) where the main fan (500) is installed.

2. The environmentally friendly tunnel construction ventilation and dust removal device according to claim 1, characterized in that, The fan (200) includes an impeller (230) and fan blades (220), with the fan blades (220) arranged around the side wall of the impeller (230).

3. The environmentally friendly tunnel construction ventilation and dust removal device according to claim 2, characterized in that, The fan (200) also includes a housing, on which a fan outer ring (210) is provided. The fan outer ring (210) is arranged around the outer periphery of the fan blade (220) and does not contact the fan blade (220).

4. The environmentally friendly tunnel construction ventilation and dust removal device according to claim 1, characterized in that, The filter screen (400) is a multi-layer textile fiber filter screen.

5. The environmentally friendly tunnel construction ventilation and dust removal device according to claim 1, characterized in that, The filter screen (400) is installed between the air duct (100) and the main fan (500), and the dust collection box (300) is installed below the filter screen (400).

6. The environmentally friendly tunnel construction ventilation and dust removal device according to claim 1, characterized in that, The main fan (500) includes an outer ring (510) and an inner ring (530) of the main fan, which are arranged from the outside to the inside. The inner ring (530) of the main fan is provided with one first fan (550), and four second fans (540) are arranged in a circumferential array between the inner ring (530) and the outer ring (510).

7. The environmentally friendly tunnel construction ventilation and dust removal device according to claim 6, characterized in that, A connecting rod (520) is provided between the inner ring (530) and the outer ring (510) of the main fan. The connecting rod (520) divides the annular area between the inner ring (530) and the outer ring (510) of the main fan into four segments. The four second fans (540) are respectively set in the four annular areas.

8. The environmentally friendly tunnel construction ventilation and dust removal device according to claim 1, characterized in that, The dust collection box (300) is a steel structure.

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