A dust removal device for building construction

Abstract

This utility model discloses a dust removal device for building construction, relating to the field of environmental protection technology in building construction. The device includes a mobile body, an independent mobile fan frame, and a fan mounted on the mobile fan frame. The fan outlet is connected to a duct assembly mounted on the mobile body via a flexible duct. The duct assembly includes a duct and a Venturi-enhanced mixing chamber connected to its outlet, the duct containing an array of annular atomizing nozzles. This utility model achieves vibration isolation and ensures spray stability by separately configuring the vibration source (fan) and the spraying mechanism (nozzle array) and connecting them with a flexible duct. Simultaneously, the structure of the Venturi-enhanced mixing chamber forces and optimizes the gas-liquid mixing process, significantly improving dust removal efficiency. This device has a reasonable structure, is easy to maintain, and provides excellent dust removal performance.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology in building construction, and more specifically, to a dust removal device for building construction. Background Technology

[0002] Construction sites generate large amounts of dust from operations such as crushing, demolition, and material transportation, which severely pollute the environment and endanger the health of on-site personnel. To control dust pollution, pneumatic spray dust suppression devices are widely used.

[0003] Existing dust suppression devices for construction sites typically employ an integrated structure, combining the fan, water pump, water storage chamber, and spray system into a single mobile unit. Specifically, the fan and annular atomizing nozzle array are usually mounted together inside a rigid duct. During operation, the high-speed airflow generated by the fan propels the water mist sprayed from the nozzles outwards, achieving dust suppression. However, this integrated design has significant shortcomings in practical applications: the fan is the main vibration source of the equipment, and the strong vibrations it generates during high-speed operation are directly transmitted to the annular atomizing nozzle array through the rigid air duct. This vibration interference leads to unstable atomization of the nozzles, uneven water mist particle size, and a reduced probability of droplet collision and combination with dust, thus affecting the overall dust removal efficiency. Since the fan is integrated inside the air duct, when the fan needs to be inspected, maintained, or replaced, the entire air duct assembly often needs to be disassembled, which is cumbersome, time-consuming, and labor-intensive, affecting the normal use of the equipment and the construction progress. The air ducts of traditional dust removal devices are mostly simple straight-cylinder structures, which fail to effectively organize the airflow pattern, resulting in insufficient mixing of high-speed airflow and droplets. The kinetic energy of the airflow is not efficiently used for droplet breakage and transport, limiting further improvement in dust removal efficiency. Utility Model Content

[0004] This invention addresses the problems of fan vibration affecting spray stability, insufficient gas-liquid mixing, and difficult equipment maintenance in existing dust removal devices for building construction. It proposes a high-efficiency dust removal device that optimizes the gas-liquid mixing process through a split design and a Venturi-enhanced mixing chamber. The device solves the technical problem of unstable spray caused by fan vibration transmission by independently setting the fan, which generates severe vibration, from the duct assembly and connecting it via a flexible duct. Simultaneously, the structural characteristics of the Venturi-enhanced mixing chamber optimize the gas-liquid two-phase mixing process, significantly improving dust removal efficiency.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A dust removal device for building construction includes a mobile body and a duct assembly and a water supply system installed on the mobile body;

[0007] A mobile fan frame independent of the mobile body, and a fan mounted on the mobile fan frame;

[0008] A flexible duct connecting the outlet of the fan to the inlet of the air duct assembly;

[0009] The air duct assembly includes an air duct and a Venturi-enhanced mixing chamber connected to the outlet of the air duct. The Venturi-enhanced mixing chamber includes a converging section, a throat, and a diverging section in sequence along the airflow direction.

[0010] The water supply system includes an annular atomizing nozzle array, which is circumferentially arranged within the throat of the Venturi enhanced mixing chamber.

[0011] Furthermore, the annular atomizing nozzle array includes multiple nozzles, the axes of which are all inclined along the airflow direction.

[0012] Furthermore, if the axial length of the tapering section is set to L, then the axial length of the throat is 1.5L to 2L, and the axial length of the expanding section is L.

[0013] Furthermore, the flexible duct is a corrugated pipe, and its two ends are detachably connected to the outlet of the fan and the inlet of the air duct through flanges and gaskets, respectively.

[0014] Furthermore, the air duct assembly is rotatably mounted on top of the mobile body via a U-shaped frame and a turntable.

[0015] Furthermore, the air duct and the Venturi-enhanced mixing chamber are integrally formed structures.

[0016] Furthermore, the bottom of the mobile fan frame is equipped with rollers, and the mobile fan frame can be selectively and detachably connected to the mobile body.

[0017] Furthermore, the water supply system also includes a water storage chamber and a water pump disposed within the mobile body; the water pump's inlet is connected to the water storage chamber, and its outlet is connected to the annular atomizing nozzle array via a water delivery pipe.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] (1) An innovative “split-type” design is adopted, in which the fan that generates violent vibration is independently installed on the mobile fan frame, which is physically separated from the air duct assembly and the annular atomizing nozzle array installed on the mobile body. The two are connected by a flexible air duct. The flexible air duct can effectively absorb and attenuate the vibration energy transmitted by the fan, thereby ensuring that the annular atomizing nozzle array in the air duct works in a micro-vibration environment, ensuring the continuous stability of atomization and the uniformity of droplet particles, greatly improving the ability of droplets to capture dust in the air, and significantly improving the dust removal efficiency.

[0020] (2) This invention connects a Venturi-enhanced mixing chamber at the outlet of the air duct. After entering the Venturi tube, the high-speed airflow is accelerated in the converging section, where it undergoes intense shearing and mixing with the droplets ejected from the nozzle array at the throat. The longer throat design provides sufficient residence time for the droplets, allowing them to be fully broken down into finer micron-sized particles by the high-speed airflow, thus increasing the specific surface area in contact with the dust. At the same time, the inclined nozzle design achieves efficient conversion of kinetic energy into surface energy. This structure forcibly enhances the mixing process of the gas and liquid phases, resulting in a qualitative leap in dust removal efficiency.

[0021] (3) Thanks to the modular design, when the fan needs maintenance or replacement, operators only need to operate the independent mobile fan frame, without disassembling the complex duct components. This makes maintenance simple and quick, reducing equipment downtime. In addition, the flexible duct connection method can compensate for installation errors and foundation deformation that may occur due to uneven ground at the construction site, enhancing the equipment's on-site adaptability. This not only improves performance but also significantly reduces the maintenance difficulty and operating costs throughout the equipment's entire life cycle.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, embodiments of this utility model are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a first-view structural schematic diagram of the dust removal device for building construction described in the embodiment;

[0025] Figure 2 This is a second-view structural schematic diagram of the dust removal device for building construction described in the embodiment;

[0026] Figure 3 This is a cross-sectional structural schematic diagram of the dust removal device for building construction described in the embodiment;

[0027] Figure 4 This is a cross-sectional schematic diagram of the design of the air duct, annular atomizing nozzle array, and Venturi-enhanced mixing chamber described in the embodiment;

[0028] In the diagram: 1. Fan; 2. Mobile fan frame; 3. Flexible duct; 4. Air duct; 5. Venturi-enhanced mixing chamber; 51. Recessed section; 52. Throat; 53. Expanding section; 6. U-shaped frame; 7. Turntable; 8. Mobile body; 9. Water inlet; 10. Water supply pipe; 11. Annular atomizing nozzle array; 12. Water pump; 13. Water storage chamber. Detailed Implementation

[0029] This utility model provides a dust removal device for building construction, which optimizes the gas-liquid mixing process through a split design and a Venturi-enhanced mixing chamber, significantly improving dust removal efficiency and simplifying maintenance procedures. The following description, in conjunction with the appendix... Figures 1 to 4 The specific embodiments of this utility model are described in detail below, including the designations of each component.

[0030] like Figure 1 and Figure 2 As shown, the overall structure of the dust removal device for building construction of this utility model includes a fan 1, a mobile fan frame 2, a flexible air duct 3, an air duct assembly, a water supply system, and a mobile body 8. The mobile body 8 serves as the main frame of the entire device, integrating components such as the air duct assembly and the water supply system. It is equipped with casters at the bottom for overall movement. The mobile fan frame 2 is independently set up from the mobile body 8, and it also has casters at the bottom for mounting the fan 1 and for independent movement. This split design prevents the vibration generated by the fan 1 from being directly transmitted to the air duct assembly, thus avoiding the problem of unstable spraying.

[0031] Flexible duct 3 connects the outlet of fan 1 to the inlet of the duct assembly. Its two ends are detachably connected to the outlet of fan 1 and the inlet of duct 4 via flanges and gaskets, respectively. Flexible duct 3 uses a corrugated pipe structure, possessing a certain degree of flexibility and bending performance, effectively absorbing and attenuating the vibration energy transmitted by fan 1. This design not only achieves physical isolation between fan 1 and the duct assembly but also compensates for installation errors in cases of uneven ground or foundation deformation at the construction site, enhancing the equipment's on-site adaptability. Gaskets are installed at the flange connections to ensure the airflow channel is sealed, preventing airflow leakage from affecting the dust removal effect.

[0032] The air duct assembly includes an air duct 4 and a Venturi-enhanced mixing chamber 5, which are integrally molded to ensure the smoothness and continuity of the airflow channel, reducing turbulence and energy loss during airflow. The Venturi-enhanced mixing chamber 5, along the airflow direction, includes a converging section 51, a throat 52, and a expanding section 53. Figure 3 and Figure 4 As shown, the axial length of the tapering section 51 is L, the axial length of the throat 52 is 1.5L to 2L, and the axial length of the expanding section 53 is L. This design fully utilizes the Venturi effect. When the high-speed airflow enters the tapering section 51, it is accelerated and undergoes intense shearing and mixing with the water mist sprayed from the annular atomizing nozzle array 11 at the throat 52. The longer throat 52 design provides sufficient residence time for the droplets, allowing them to be fully broken down into finer micron-sized particles by the high-speed airflow, increasing the specific surface area in contact with dust and thus significantly improving dust removal efficiency.

[0033] An annular atomizing nozzle array 11 is circumferentially arranged within the throat 52 of the Venturi-enhanced mixing chamber 5, comprising multiple nozzles. The axes of these nozzles are all inclined along the airflow direction, with an inclination angle ranging from 15° to 30°. This inclined design causes the sprayed water mist to generate shear force under the action of high-speed airflow, efficiently converting kinetic energy into surface energy, further refining the droplet size and enhancing its diffusion ability. The water supply system includes a water storage chamber 13, a water pump 12, and a water delivery pipe 10. The water storage chamber 13 is located within the mobile body 8 and is used to store water for spraying. The inlet of the water pump 12 is connected to the water storage chamber 13, and its outlet is connected to the annular atomizing nozzle array 11 via the water delivery pipe 10. The water delivery pipe 10 is made of high-pressure resistant material to withstand pressure changes during water pump 12 delivery. The water storage chamber 13 has a water inlet 9 for replenishing water for spraying, ensuring a water supply during long-term operation.

[0034] The ventilation duct assembly is rotatably mounted on top of the mobile body 8 via a U-shaped frame 6 and a turntable 7, allowing the assembly to flexibly adjust the spray direction according to construction needs and adapt to different working environments. The design of the U-shaped frame 6 and turntable 7 enables the ventilation duct assembly to rotate horizontally and also adjust its pitch to a certain angle vertically, meeting spraying requirements at different heights and angles. This flexibility is particularly suitable for construction scenarios with complex terrain or variable working conditions.

[0035] In actual operation, the fan 1 is first started, and the high-speed airflow enters the air duct 4 through the flexible duct 3. After being accelerated through the tapering section 51 of the Venturi-enhanced mixing chamber 5, it reaches the throat 52. At the same time, the water pump 12 in the water supply system draws water from the water storage chamber 13 and sends it to the annular atomizing nozzle array 11 through the water delivery pipe 10. The water mist sprayed from the nozzle array 11 undergoes intense shearing and mixing with the high-speed airflow at the throat 52. Due to the reasonable length design of the throat 52, the droplets have sufficient residence time in it and are fully broken into finer particles by the high-speed airflow, thereby increasing the specific surface area in contact with dust in the air. Subsequently, the mixed gas-liquid two-phase flow enters the diffuser section 53, where the airflow velocity gradually decreases but the pressure increases, propelling the droplets to a distance and covering a wider dust removal area.

[0036] In terms of maintenance, when the fan 1 needs to be inspected or replaced, it can be done simply by operating the independent mobile fan frame 2, without disassembling the complex duct components, which greatly simplifies the maintenance process and reduces equipment downtime. In addition, the detachable connection of the flexible duct 3 also facilitates quick replacement or repair, further reducing the maintenance difficulty and operating costs of the equipment throughout its entire life cycle.

[0037] In summary, this invention, through its split design and the application of a Venturi-enhanced mixing chamber, solves the problems of unstable spray caused by fan vibration transmission, insufficient gas-liquid mixing, and difficult equipment maintenance inherent in existing technologies. This device not only significantly improves dust removal efficiency but also possesses excellent on-site adaptability and convenient maintenance characteristics, making it widely applicable to dust control at construction sites and providing reliable technical support for environmentally friendly construction.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dust removal device for house building construction, comprising a mobile machine body (8) and a wind cylinder assembly and a water supply system installed on the mobile machine body (8), characterized in that, The device further includes: A mobile fan frame (2) independent of the mobile body (8), and a fan (1) installed on the mobile fan frame (2); A flexible duct (3) connecting the outlet of the fan (1) to the inlet of the duct assembly; The air duct assembly includes an air duct (4) and a Venturi-enhanced mixing chamber (5) connected to the outlet of the air duct (4). The Venturi-enhanced mixing chamber (5) includes a tapering section (51), a throat (52), and a diffusing section (53) in sequence along the airflow direction. The water supply system includes an annular atomizing nozzle array (11) which is circumferentially disposed within the throat (52) of the Venturi enhanced mixing chamber (5).

2. The dust removal device for building construction according to claim 1, characterized in that, The annular atomizing nozzle array (11) includes multiple nozzles, the axes of which are all inclined along the airflow direction.

3. The housing construction work dust removing device according to claim 1, characterized by If the axial length of the tapering section (51) is set to L, then the axial length of the throat (52) is 1.5L to 2L, and the axial length of the expanding section (53) is L.

4. The housing construction work dust removing device according to claim 1, wherein The flexible duct (3) is a corrugated pipe, and its two ends are detachably connected to the outlet of the fan (1) and the inlet of the air duct (4) through flanges and gaskets, respectively.

5. The housing construction work dust removing device according to claim 1, wherein The air duct assembly is rotatably mounted on top of the mobile body (8) via a U-shaped frame (6) and a turntable (7).

6. The dust removal device for building construction according to claim 1, characterized in that, The air duct (4) and the Venturi-enhanced mixing chamber (5) are integrally formed structures.

7. The housing construction work dust removing device according to claim 1, wherein The bottom of the mobile fan frame (2) is provided with rollers, and the mobile fan frame (2) can be selectively and detachably connected to the mobile body (8).

8. The housing construction work dust removing device according to claim 1, wherein The water supply system also includes a water storage chamber (13) and a water pump (12) disposed in the mobile body (8); the water inlet of the water pump (12) is connected to the water storage chamber (13), and its outlet is connected to the annular atomizing nozzle array (11) through a water supply pipe (10).

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