Efficient air filtering device for foundation pit air film

Abstract

The invention belongs to the technical field of foundation pit air films, and particularly relates to an efficient air filtering device for a foundation pit air film. The air supply assembly comprises a plurality of air feeders and is installed at an air supply outlet in the side wall of the foundation pit air film. The air supply assembly is used for supplying air outside the foundation pit air film into the foundation pit air film; the filtering arch cover is of an arch structure, and the side wall of the filtering arch cover can conduct internal and external ventilation. Filter cloth for filtering air is arranged in the side wall of the filter arch cover; one end of the filtering arch cover is connected with the air supply assembly so that the air supply assembly can pump air in the filtering arch cover into the foundation pit air film. A door structure capable of being opened and closed is arranged at the other end of the filtering arch cover; and at least one layer of filter cloth is arranged on the filter arch cover from inside to outside. According to the scheme, modular design is adopted for the filtering arch covers and the air supply assemblies, the number of the filtering arch covers and the number of the air supply assemblies are increased or decreased according to needs, splicing is conducted, the use requirements of foundation pit air films of different working conditions and different capacities are met, and universality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit air film, and in particular relates to a high-efficiency air filtering device for foundation pit air film. Background Art

[0002] The foundation pit air film is a structure that can cover the top of the foundation pit. It forms a closed and controlled excavation environment space through inflation or mechanical support to provide protection for the foundation pit. This structure has multiple functions such as dust prevention, noise reduction, heat preservation, heat insulation, wind resistance, and impact resistance. It can effectively improve the construction environment of the construction site and reduce the impact of construction on the surrounding environment. As an innovative site protection measure, the foundation pit air film has received widespread attention and application in the field of construction in recent years.

[0003] A certain amount of air often needs to be filled into the foundation pit air film to maintain its shape and stability. At the same time, an air filtration device is also needed to realize the ventilation of the air inside and outside the foundation pit air film. When the foundation pit air film is used in the construction site, the air often needs to be filtered. The existing air filtration equipment can only filter the air of the foundation pit air film of a specified space size. However, the air filtration amount is often related to factors such as the cleanliness of the ambient air and the size of the foundation pit air film. Air filtration equipment using a constant filtration amount often cannot meet the needs of complex situations or causes waste.

[0004] Therefore, it is necessary to design a high-efficiency air filtration device for foundation pit air film with better scalability and capable of meeting the requirements of different working conditions. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a high-efficiency air filtration device for foundation pit air film.

[0006] The technical solution adopted by the present invention is:

[0007] A high-efficiency air filter device for foundation pit air film, comprising a filter arch cover and an air supply component;

[0008] The air supply assembly includes a plurality of air supply fans, and is installed at the air supply outlet of the side wall of the foundation pit air film; the air supply assembly is used to send the air outside the foundation pit air film into the foundation pit air film;

[0009] The filter arch cover is an arch structure, and the side walls of the filter arch cover can be ventilated inside and outside; a filter cloth for air filtration is arranged inside the side walls of the filter arch cover; one end of the filter arch cover is connected to the air supply component so that the air supply component can pump the air inside the filter arch cover into the foundation pit air membrane; the other end of the filter arch cover is provided with an openable and closable door structure; the filter arch cover is provided with at least one layer of filter cloth from the inside to the outside.

[0010] As an alternative or supplement to the above-mentioned high-efficiency air filtration device for foundation pit air membrane: the filter arch cover includes several arch cover filter components, and the several arch cover filter components can be spliced ​​along the length direction; the arch cover filter components are divided into inner filter components and outer filter components; the inner filter components and the outer filter components can be used separately, and the outer filter component can also be covered outside the inner filter component for combined use.

[0011] As an alternative or supplement to the above-mentioned high-efficiency air filtration device for foundation pit air membrane: the arch cover filter assembly includes an outer air permeable shell, an inner air permeable shell, a longitudinal seat plate and two arched end plates; the two arched end plates are vertically arranged in parallel, and a plurality of longitudinal seat plates are fixedly connected between the two arched end plates; the outer air permeable shell is arranged between the two arched end plates and connected to the outer edge of the longitudinal seat plate, the inner air permeable shell is arranged between the two arched end plates and connected to the inner edge of the longitudinal seat plate, the outer air permeable shell is arranged on the outside of the inner air permeable shell and a filter cavity is formed between the two, and the filter cloth is installed in the filter cavity.

[0012] As an alternative or supplement to the above-mentioned high-efficiency air filtration device for foundation pit air membrane: the filter cloth adopts a flexible filter cloth, and a driving wheel, a driven wheel and a longitudinal guide roller are arranged in the filter cavity; the flexible filter cloth is connected end to end in a ring shape and is connected between the driving wheel and the driven wheel, and a number of longitudinal guide rollers cooperate to support the flexible filter cloth so that the flexible filter cloth does not contact the outer air permeable shell and the inner air permeable shell; the driving wheel and the driven wheel are respectively located on the left and right sides of the arch cover filter assembly.

[0013] As an alternative or supplement to the above-mentioned high-efficiency air filtration device for foundation pit air film: a rotating brush is arranged above the driving wheel or the driven wheel, and multiple rotating brushes are arranged in parallel along the length direction of the arch cover filter assembly and are connected to the brushing motor; the bristles on the inner and outer sides of the rotating brush are in contact with the flexible filter cloth to brush off the dust on the flexible filter cloth.

[0014] As an alternative or supplement to the above-mentioned high-efficiency air filtration device for foundation pit air film: the longitudinal seat plate includes a first longitudinal seat plate; the brushing motor is fixed on the first longitudinal seat plate, and a brush shaft is arranged at the center of the rotating brush, and the upper end of the brush shaft is rotatably connected to the first longitudinal seat plate, and the rotating brush is connected to the brushing motor through a gear chain transmission.

[0015] As an alternative or supplement to the above-mentioned high-efficiency air filtration device for foundation pit air film: a shaft is arranged at the center of the driving wheel, the two ends of the shaft are rotatably connected to the two arched end plates, and the shaft is transmission-connected to the rotation control motor; a plurality of driving wheels spaced apart from each other are fixedly connected to the shaft; a rotating connecting head is rotatably connected to the lower end of the brush shaft, and the lower end of the rotating connecting head is rotatably connected to the shaft.

[0016] As an alternative or supplement to the above-mentioned high-efficiency air filtration device for foundation pit air membrane: a heater is arranged in the filter cavity, and the heater is used to dry the flexible filter cloth.

[0017] As an alternative or supplement to the above-mentioned high-efficiency air filtration device for the foundation pit air film: the air supply assembly also includes a blower, a lower base plate, pads, a fresh air branch, a fresh air duct and a vertical plate; the lower base plate is in the shape of a strip, the vertical plate is vertically connected to the top of the lower base plate, and pads are provided on the bottom of the lower base plate; the air supply fan and the blower are both installed on the vertical plate, the fresh air duct is arranged in the foundation pit air film and connected to the blower, and a number of fresh air branches are provided on the fresh air duct.

[0018] As an alternative or supplement to the above-mentioned high-efficiency air filtration device for foundation pit air membrane: an exhaust fan device is arranged at a position opposite to the rotating brush outside the filter arch cover, and the exhaust fan device is used to extract dust from the rotating brush.

[0019] The beneficial effects of the present invention are as follows: the filter arch cover and air supply assembly of the high-efficiency air filter device in this scheme are both modularly designed, and can be increased or decreased in number and assembled as needed, so as to meet the use requirements of foundation pit air membranes of different working conditions and different capacities, improve the versatility and ease of use of the high-efficiency air filter device, and compared with the existing air filter equipment with a constant filtration volume, it has stronger adaptability to complex environments, effectively avoiding the waste caused by excessive filtration volume and the problem of being unable to use when the environment changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below.

[0021] Figure 1 It is a cross-sectional structural diagram of the high-efficiency air filter device of this scheme;

[0022] Figure 2 It is a partial structural diagram of the rotating brush;

[0023] Figure 3 This is a right side view of the rotating brush;

[0024] Figure 4 It is a structural diagram of the combination of the inner filter component and the outer filter component;

[0025] Figure 5 It is the coordination diagram of the high-efficiency air filtration device and the foundation pit air film.

[0026] In the figure: 1-arch filter assembly; 1a-inner filter assembly; 1b-outer filter assembly; 11-outer breathable shell; 12-flexible filter cloth; 13-inner breathable shell; 14-second longitudinal seat plate; 15-universal roller; 16-longitudinal guide roller; 17-rotating brush; 18-driving wheel; 19-brushing motor; 110-arch end plate; 111-first longitudinal seat plate; 112-axle; 113-rotating connector; 114-rotating control motor; 115-heater; 116-third longitudinal seat plate; 2-air supply assembly; 21-air supply fan; 22-blower; 23-lower bottom plate; 24-foot pad; 25-fresh air outlet; 26-fresh air duct; 27-vertical plate; 3-exhaust fan equipment; 31-movable seat; 4-foundation pit air film. DETAILED DESCRIPTION

[0027] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only some of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of this solution.

[0028] like Figures 1 to 5 As shown, this embodiment designs a high-efficiency air filtration device for a foundation pit air membrane 4, including components such as a filter arch cover and an air supply assembly 2.

[0029] The air supply assembly 2 includes a plurality of air supply fans 21, and is installed at the air supply port of the side wall of the foundation pit air film 4; the air supply assembly 2 is used to send the air outside the foundation pit air film 4 into the foundation pit air film 4; the air supply assembly 2 is connected to the filter arch cover, and the air filtered by the filter arch cover enters the filter arch cover, and is sent to the foundation pit air film 4 by the air supply assembly 2, so as to realize the sending of fresh air into the foundation pit air film 4. Similarly, when the air supply assembly 2 extracts air from the foundation pit air film 4, the air will be sent into the filter arch cover, and then sent out to the natural environment after being filtered by the filter arch cover.

[0030] The filter arch is an arch structure, and the side wall of the filter arch can be ventilated inside and outside; a filter cloth for air filtration is arranged inside the side wall of the filter arch, and when the air flows between the inside and outside of the filter arch, the filter cloth can be used to filter the air, thereby reducing particulate matter in the air. One end of the filter arch is connected with the air supply component 2, so that the air supply component 2 can pump the air inside the filter arch into the foundation pit air film 4; the other end of the filter arch is provided with an openable and closable door structure, and when the door structure is in a closed state, more air can flow through the filter cloth; the filter arch is provided with at least one layer of filter cloth from the inside to the outside, and the material of the filter cloth can be selected according to actual needs.

[0031] In some specific embodiments, the filtering arch cover can adopt the following structure: the filtering arch cover includes a plurality of arch cover filter components 1, and the plurality of arch cover filter components 1 can be spliced ​​along the length direction, so that the arch cover filter components 1 can be connected in parallel by splicing, and the air filtering amount can be effectively improved without increasing the air supply port on the foundation pit air film 4, and the filtering amount can be increased. Since the arch cover filter components 1 can be spliced ​​and disassembled with each other, the number of the arch cover filter components 1 can be increased or decreased to meet the needs of different working conditions. The arch cover filter component 1 is divided into an inner filter component 1a and an outer filter component 1b; the inner filter component 1a and the outer filter component 1b can be used separately, and the outer filter component 1b can also be covered outside the inner filter component 1a for combined use. When the dust filtering efficiency of a single arch cover filter component 1 is insufficient, an inner and outer multi-layer arch cover filter component 1 can be set to improve the dust interception rate, and this method of adding the arch cover filter component 1 will not affect the use of the initial structure, and the use is more flexible and changeable.

[0032] In some specific embodiments, the arch filter assembly 1 can adopt the following structure: the arch filter assembly 1 includes an outer air-permeable shell 11, an inner air-permeable shell 13, a longitudinal seat plate and two arched end plates 110; the two arched end plates 110 are vertically arranged in parallel, and a plurality of longitudinal seat plates are fixedly connected between the two arched end plates 110; the outer air-permeable shell 11 is arranged between the two arched end plates 110 and connected to the outer edge of the longitudinal seat plate, the inner air-permeable shell 13 is arranged between the two arched end plates 110 and connected to the inner edge of the longitudinal seat plate, the outer air-permeable shell 11 is arranged on the outer side of the inner air-permeable shell 13 and a filter cavity is formed between the two, and the filter cloth is installed in the filter cavity. In the same filter cavity, the quantity, thickness and material of the filter cloth can also be adjusted according to actual needs to meet the working conditions.

[0033] The filter cloth adopts a flexible filter cloth 12, and a driving wheel 18, a driven wheel and a longitudinal guide roller 16 are arranged in the filter chamber; the flexible filter cloth 12 is connected in a ring shape and connected between the driving wheel 18 and the driven wheel, and a plurality of longitudinal guide rollers 16 cooperate to support the flexible filter cloth 12, so that the flexible filter cloth 12 does not contact the outer air-permeable shell 11 and the inner air-permeable shell 13; the driving wheel 18 and the driven wheel are respectively located on the left and right sides of the arch filter assembly 1. By controlling the rotation of the driving wheel 18, the flexible filter cloth 12 can be moved, and the particle size of the dust filtered at different heights of the arch filter assembly 1 is different, causing the particle size of the dust accumulated on the flexible filter cloth 12 to increase from top to bottom, causing the lower area of ​​the flexible filter cloth 12 to be more easily blocked, affecting the filtering efficiency, and by the cooperation of the driving wheel 18 and the driven wheel, the flexible filter cloth 12 can be moved, and the easily blocked area can be moved up and the not easily blocked area can be moved down, thereby ensuring the filtering efficiency of the flexible filter cloth 12.

[0034] In some specific embodiments, a rotating brush 17 is arranged above the driving wheel 18 or the driven wheel, and a plurality of rotating brushes 17 are arranged in parallel along the length direction of the arch filter assembly 1 and are in transmission connection with the brushing motor 19; the bristles on the inner and outer sides of the rotating brush 17 contact the flexible filter cloth 12 to brush off the dust on the flexible filter cloth 12. When the brushing motor 19 is powered on and controls the rotating brush 17 to rotate, the particulate matter accumulated on the flexible filter cloth 12 can be brushed off and then discharged by the exhaust fan device 3, which is convenient for regular maintenance of the flexible filter cloth 12 and ensures the filtering performance of the flexible filter cloth 12.

[0035] The longitudinal seat plate includes a first longitudinal seat plate 111; a scrubbing motor 19 is fixed on the first longitudinal seat plate 111, a brush shaft is arranged at the center of the rotating brush 17, the upper end of the brush shaft is rotatably connected to the first longitudinal seat plate 111, and the rotating brush 17 is connected to the scrubbing motor 19 via a gear chain transmission.

[0036] A shaft 112 is provided at the center of the driving wheel 18, and the two ends of the shaft 112 are rotatably connected to the two arched end plates 110, and the shaft 112 is transmission-connected to the rotation control motor 114; a plurality of driving wheels 18 spaced apart from each other are fixedly connected to the shaft 112; a rotating connector 113 is rotatably connected to the lower end of the brush shaft, and the lower end of the rotating connector 113 is rotatably connected to the shaft 112. The rotating connector 113 can not only provide support for the rotation of the rotating brush 17, and improve the stability of the rotating brush 17 when in use, but also reduce the mutual interference between the shaft 112 and the rotating brush 17 when they rotate independently, and improve the stability and reliability of use.

[0037] In some specific embodiments, a heater 115 is provided in the filter cavity, and the heater 115 is used to dry the flexible filter cloth 12. The heater 115 can dry the surface of the filter cloth. In a period of time or area with relatively high humidity, after the filter cloth is dried by the heater 115, not only the filtering performance of the filter cloth is guaranteed, but also the problem of the filter cloth and dust being difficult to clean from the filter cloth due to transitional bonding through water can be avoided, thereby extending the service life of the filter cloth; in addition, the surface of the flexible filter cloth 12 can be prevented from freezing, which affects normal use.

[0038] In some specific embodiments, the air supply assembly 2 further includes a blower 22, a lower base plate 23, a foot 24, a fresh air outlet 25, a fresh air pipe 26 and a vertical plate 27; the lower base plate 23 is in the shape of a strip, the vertical plate 27 is vertically connected to the upper part of the lower base plate 23, and a foot 24 is provided at the bottom of the lower base plate 23; the blower 21 and the blower 22 are both installed on the vertical plate 27, the fresh air pipe 26 is arranged in the foundation pit air film 4 and connected to the blower 22, and a plurality of fresh air outlets 25 are provided on the fresh air pipe 26. Fresh air can pass through the blower 22 and the fresh air pipe 26 and be discharged from the fresh air outlet 25, thereby realizing the local fresh air supply in the foundation pit air film 4, thereby improving the comfort of the corresponding area and ensuring the flexibility of fresh air supply.

[0039] In some specific embodiments, an exhaust fan device 3 is arranged on the outside of the filter arch cover at a position opposite to the rotating brush 17. The exhaust fan device 3 is used to extract dust from the rotating brush 17. When multiple layers of arch cover filter assemblies 1 are arranged, the exhaust fan device 3 can uniformly remove dust from the filter cloth inside. In addition, the exhaust fan device 3 and the arch cover filter assembly 1 are independent of each other, so that the power and quantity of the exhaust fan device 3 can be freely matched as needed.

[0040] The above embodiments are merely examples for the purpose of clarifying the description, and are not intended to limit the implementation methods; it is not necessary and impossible to list all implementation methods exhaustively. However, obvious changes or modifications derived therefrom are still within the scope of protection of the present technology.

Claims

1. A high-efficiency air filter for a foundation pit air film (4), characterized in that: It includes a filter arch and an air supply assembly (2); The air supply assembly (2) includes a plurality of air supply fans (21) and is installed at the air supply outlet of the side wall of the foundation pit air film (4); the air supply assembly (2) is used to supply air outside the foundation pit air film (4) into the foundation pit air film (4); The filter arch is an arched structure, and the side wall of the filter arch can be ventilated inside and outside; a filter cloth for air filtering is arranged inside the side wall of the filter arch; one end of the filter arch is connected to the air supply component (2) so that the air supply component (2) can pump the air inside the filter arch into the foundation pit air membrane (4); the other end of the filter arch is provided with an openable and closable door structure; and at least one layer of filter cloth is arranged from the inside to the outside of the filter arch.

2. The high-efficiency air filter device for the foundation pit air film (4) according to claim 1 is characterized in that: The filtering arch comprises a plurality of arch filter assemblies (1), and the plurality of arch filter assemblies (1) can be spliced ​​along the length direction; the arch filter assembly (1) is divided into an inner filter assembly (1a) and an outer filter assembly (1b); the inner filter assembly (1a) and the outer filter assembly (1b) can be used separately, and the outer filter assembly (1b) can also be covered outside the inner filter assembly (1a) for combined use.

3. The high efficiency air filter device for the foundation pit air film (4) according to claim 2 is characterized in that: The arch filter assembly (1) comprises an outer air-permeable shell (11), an inner air-permeable shell (13), a longitudinal seat plate and two arched end plates (110); the two arched end plates (110) are arranged vertically in parallel, and a plurality of longitudinal seat plates are fixedly connected between the two arched end plates (110); the outer air-permeable shell (11) is arranged between the two arched end plates (110) and connected to the outer edge of the longitudinal seat plate, the inner air-permeable shell (13) is arranged between the two arched end plates (110) and connected to the inner edge of the longitudinal seat plate, the outer air-permeable shell (11) is arranged on the outer side of the inner air-permeable shell (13) and a filter cavity is formed between the two, and the filter cloth is installed in the filter cavity.

4. The high-efficiency air filter device for the foundation pit air film (4) according to claim 3 is characterized in that: The filter cloth adopts a flexible filter cloth (12), and a driving wheel (18), a driven wheel and a longitudinal guide roller (16) are arranged in a filter cavity; the flexible filter cloth (12) is connected end to end in a ring shape and is connected between the driving wheel (18) and the driven wheel, and a plurality of longitudinal guide rollers (16) cooperate to support the flexible filter cloth (12) so that the flexible filter cloth (12) does not contact the outer air permeable shell (11) and the inner air permeable shell (13); the driving wheel (18) and the driven wheel are respectively located on the left and right sides of the arch cover filter assembly (1).

5. The high efficiency air filter device for the foundation pit air film (4) according to claim 4 is characterized in that: A rotating brush (17) is arranged above the driving wheel (18) or the driven wheel. A plurality of rotating brushes (17) are arranged in parallel along the length direction of the arch filter assembly (1) and are drivingly connected to a brushing motor (19). The bristles on the inner and outer sides of the rotating brush (17) contact the flexible filter cloth (12) to brush off dust on the flexible filter cloth (12).

6. The high-efficiency air filter device for the foundation pit air film (4) according to claim 5 is characterized in that: The longitudinal seat plate comprises a first longitudinal seat plate (111); a scrubbing motor (19) is fixed on the first longitudinal seat plate (111); a brush shaft is arranged at the center of a rotating brush (17); the upper end of the brush shaft is rotatably connected to the first longitudinal seat plate (111); and the rotating brush (17) is connected to the scrubbing motor (19) by a gear chain transmission.

7. The high efficiency air filter device for foundation pit air film (4) according to claim 6 is characterized in that: A shaft (112) is arranged at the center of the driving wheel (18), the two ends of the shaft (112) are rotatably connected to the two arched end plates (110), and the shaft (112) is transmission-connected to a rotation control motor (114); a plurality of driving wheels (18) spaced apart from each other are fixedly connected to the shaft (112); a rotating connector (113) is rotatably connected to the lower end of the brush shaft, and the lower end of the rotating connector (113) is rotatably connected to the shaft (112).

8. The high efficiency air filter device for foundation pit air film (4) according to claim 4 is characterized in that: A heater (115) is provided in the filter cavity, and the heater (115) is used to dry the flexible filter cloth (12).

9. The high-efficiency air filter device for foundation pit air film (4) according to any one of claims 1 to 8, characterized in that: The air supply assembly (2) also includes a blower (22), a lower base plate (23), a foot pad (24), a fresh air outlet (25), a fresh air pipe (26) and a vertical plate (27); the lower base plate (23) is in the shape of a strip plate, the vertical plate (27) is vertically connected to the upper part of the lower base plate (23), and a foot pad (24) is provided at the bottom of the lower base plate (23); the air supply fan (21) and the blower (22) are both installed on the vertical plate (27), the fresh air pipe (26) is arranged in the foundation pit air film (4) and connected to the blower (22), and a plurality of fresh air outlets (25) are provided on the fresh air pipe (26).

10. The high efficiency air filter device for foundation pit air film (4) according to any one of claims 4 to 7, characterized in that: An exhaust fan device (3) is arranged at a position outside the filter arch and opposite to the rotating brush (17), and the exhaust fan device (3) is used to extract dust from the rotating brush (17).

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