CN204107201U - Front filter - Google Patents

Abstract

The utility model discloses a pre-filter, which is arranged at the front end of an air suction pipe of a filter device and comprises a bracket, a supporting net and a plurality of filter layers; the front end and the rear end of the bracket are respectively provided with an air inlet and an air outlet which are communicated with each other; the support net is arranged between the air inlet and the air outlet, the middle part of the support net is provided with an accommodating cavity, the bottom surface of the accommodating cavity is provided with a filter screen, and the filter layer is arranged in the accommodating cavity; the upper edge of the containing cavity horizontally extends to the containing cavity to form a mounting rib for clamping the filter layer in the containing cavity. The utility model discloses leading filter can increase filter equipment's the region of breathing in, makes filter equipment can absorb gaseous pollutants fast, and simple structure, convenient to use and filter effect are good.

Description

Prefilter

technical field

The utility model relates to a filter device, in particular to a pre-filter installed at the front end of a suction pipe of the filter device. the

Background technique

Today, with the rapid development of social economy, electric welding operations almost involve the above-mentioned industrial fields, the number of electric welders has risen sharply, and the occupational hazards in electric welding have become increasingly prominent. During metal welding, laser cutting, and grinding operations, a large amount of smoke and dust is suspended in the workshop. If it is inhaled into the human lungs, it will seriously affect the health of the body. Therefore, these harmful smoke and dust must be purified before welding dust enters the breathing zone of the welder. the

The existing air filtration method is generally to install the filter device in the processing workshop or above the processing site. When filtering, the filter device sucks the polluted air in the processing area, so that the polluted air flows into the inside of the filter device for filtering. Although the above-mentioned filter method can purify the air, because it is fixed in a certain place for inhalation, it has a large volume and is inconvenient to move and use, so the inhalation is inflexible and the inhalation area is limited. In addition, this filtering method is to filter the polluted air after the toxic gas pollutes the surrounding air, instead of directly inhaling the pollution source. The toxic gas is easy to diffuse, so the absorption speed of the toxic gas will become slower Therefore, part of the polluted air may still be inhaled by the human body, which will cause harm to the human body. the

Utility model content

The purpose of the utility model is to provide a pre-filter that can increase the suction area of the filter device, so that the filter device can quickly absorb the polluted gas, has a simple structure, is convenient to use and has a good filtering effect. the

In order to achieve the above object, the pre-filter provided by the utility model is installed on the front end of the suction pipe of the filter device, which includes a support, a support net and several filter layers; the front end and the rear end of the support are respectively provided with interconnected An air inlet and an air outlet; the support net is installed between the air inlet and the air outlet, and the middle part of the support net is provided with a storage cavity, and the bottom surface of the storage cavity is a filter screen, so The filter layer is installed in the accommodating cavity; the upper edge of the accommodating cavity extends horizontally into the accommodating cavity to form installation ribs that clamp the filter layer in the accommodating cavity. the

Because the utility model is provided with a supporting net, and an accommodating cavity is set on the supporting net, the filter layer is accommodated in the accommodating cavity, and the bottom surface of the accommodating cavity is set as a filter net, thereby The gas can pass through the filter layer and the filter net from the air inlet to the air outlet, so as to filter the gas; moreover, installation ribs are arranged on the upper edge of the accommodating cavity, and the installation ribs can be placed on the The filter layer is positioned in the accommodating cavity to prevent it from detaching from the accommodating cavity, so that it is more stable during use, therefore, the entire pre-filter can be installed on the air suction of the filter device The front end of the tube can be moved freely to any air-polluted area during use, thereby increasing the suction area of the filter device. The structure is simple, easy to use and has a good filtering effect. the

Preferably, the filter screen has a honeycomb structure. the

Preferably, several protrusions are arranged on the filter. The protruding points can form a gap between the filter layer and the filter net, thereby enhancing the air circulation between the filter layer and the filter net, and increasing the filtering speed. the

Preferably, the upper end of the supporting net horizontally extends out of the engaging edge, the inner side of the air inlet is provided with an engaging groove, and the engaging edge is engaged in the engaging groove. By setting the engaging edge and the engaging groove, the support net can be detachably installed on the support, and can be stably connected with the support during use, preventing accidental detachment from the support during use . the

Preferably, the sidewalls at both ends of the accommodating cavity are provided with recesses for taking out the filter layer by hand. the

Preferably, the bracket is gradually narrowed from the air inlet to the air outlet. By setting the narrowed structure, the gas entering from the air inlet can enter more easily, thereby increasing the filtering speed. the

Preferably, the filter layer includes a fiber cotton layer. the

Specifically, the filter layer also includes a glass fiber layer and/or a PP filter layer and/or an activated carbon layer, and the glass fiber layer and/or a PP filter layer and/or an activated carbon layer are arranged between the fiber cotton layer and the between the filters. the

Preferably, the rear end of the bracket extends out of an installation cylinder that is socketed with the suction pipe of the filter device, the installation cylinder is cylindrical, and the air outlet is opened at the end of the installation cylinder. the

Preferably, the outer surface of the bracket is provided with a silicone sleeve. the

Description of drawings

Fig. 1 is a structural schematic diagram of the pre-filter of the present invention. the

Fig. 2 is an exploded schematic view of the pre-filter of the present invention. the

Fig. 3 is a structural schematic diagram of the middle support net of the pre-filter of the present invention. the

Fig. 4 is a schematic cross-sectional view of the pre-filter of the present invention. the

Detailed ways

In order to describe the technical content, structural features, and achieved effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings. the

As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model pre-filter 100 is installed on the front end of the suction pipe 200 of the filter device (not shown in the figure), and it includes a support 1, a support net 2 and several filter layers 3 The front end and the rear end of the support 1 are respectively provided with an air inlet 11 and an air outlet 12 communicating with each other; the support net 2 is installed between the air inlet 11 and the air outlet 12, and the support The middle part of net 2 is provided with accommodating cavity 21, and the bottom surface of described accommodating cavity 21 is filter screen 22, and described filter layer 3 is installed in described accommodating cavity 21; The upper edge of described accommodating cavity 21 is horizontally The mounting ribs 21a that hold the filter layer 3 in the housing cavity 21 extend into the housing cavity 21, and the mounting ribs 21a are arranged on the upper edges of the housing cavity 21 facing each other. sides. the

As shown in FIGS. 2 and 3 , specifically, the filter 22 has a honeycomb structure. The filter net 22 is provided with a plurality of bumps 22a. The protruding points 22a can create a gap between the filter layer 3 and the filter net 22, thereby enhancing the air circulation between the filter layer 3 and the filter net 22 and increasing the filtering speed. An engaging edge 23 extends horizontally from the upper end of the support net 2 , and an engaging groove 13 is defined inside the air inlet 11 , and the engaging edge 23 is engaged in the engaging groove 13 . By providing the engaging edge 23 and the engaging groove 13, the support net 2 can be detachably installed on the bracket 1, and can be stably connected with the bracket 1 during use, preventing Accidentally detach from the bracket 1. The sidewalls at both ends of the accommodating cavity 21 are provided with a recess 21b for taking out the filter layer 3 by hand. the

The bracket 1 is gradually narrowed from the air inlet 11 to the air outlet 12 . By setting the narrowed structure, the gas entering from the air inlet 11 can enter more easily, thereby increasing the filtering speed. the

Please refer to FIG. 2 and FIG. 4 again, the filter layer 3 includes a fiber wool layer 31 and a glass fiber layer 32 ; the glass fiber layer 31 is disposed between the fiber wool layer 31 and the filter net 22 . Of course, the filter layer 3 may also include a PP filter layer and/or an activated carbon layer, which can be arranged in sequence according to needs. the

The rear end of the bracket 1 extends out of the installation cylinder 14 which is socketed with the suction pipe 200 of the filter device. The installation cylinder 14 is cylindrical, and the air outlet 12 is opened at the end of the installation cylinder 14 . In addition, the outer surface of the bracket 1 is provided with a silicone sleeve 4 . the

Since the utility model is provided with a supporting net 2 and an accommodating cavity 21 is set on the supporting net 2, the filter layer 3 is accommodated in the accommodating cavity 21, and the accommodating cavity 21 The bottom surface is set as a filter screen 22, so that the gas can pass through the filter layer 3 and the filter screen 22 from the air inlet 11 to the gas outlet 12, so as to filter the gas; The upper edge of the upper edge is provided with a mounting rib 21a, and the mounting rib 21a can position the filter layer 3 in the accommodating cavity 21 to prevent it from detaching from the accommodating cavity 21, so that it is more stable during use, Therefore, the whole pre-filter 100 can be installed on the front end of the suction pipe 200 of the filter device, and it can be moved to any air-polluted area or directly aimed at the pollution source during use, thereby increasing the size of the filter device. Inhalation area and increase inhalation speed; In addition, the pre-filter 100 can intercept more than 95% of pollutants, greatly reducing the accumulation of harmful substances in the smoke on the inner wall of the smoking pipe, thereby reducing the accumulation of pollutants The blockage of the inner wall of the smoking pipe directly caused by the substance causes poor smoking, reduced suction, and industrial accidents such as spontaneous combustion fires and dust explosions, so there is no need to consider the problem of cleaning the smoking pipe; and, the pre-filter 100 Good visibility, it is clear at a glance whether the filter layer is clogged or failed, and the convenience of replacement is ten times that of traditional products. It is very convenient to use, greatly reduces the waste of manpower and material resources, reduces the hidden danger of harm and secondary pollution, and improves safety. , Convenience, quickness and environmental protection. the

What is disclosed above is only a preferred example of the utility model, and of course the scope of rights of the utility model cannot be limited with this. Therefore, equivalent changes made according to the patent scope of the utility model still belong to the scope covered by the utility model . the

Claims (10)

1. a fore filter, is installed on the air intake duct front end of filter, it is characterized in that: comprise support, supporting network and some filter courses; The front end of described support and rear end are respectively equipped with the air inlet and gas outlet that are interconnected; Described supporting network is installed between described air inlet and described gas outlet, and the middle part of described supporting network is provided with accommodating cavity, and the bottom surface of described accommodating cavity is screen pack, and described filter course is installed in described accommodating cavity; The top edge of described accommodating cavity flatly extends and holds the installation rib of described filter course in described accommodating cavity in described accommodating cavity.

2. fore filter as claimed in claim 1, is characterized in that: described screen pack is alveolate texture.

3. fore filter as claimed in claim 1, is characterized in that: described screen pack is provided with some bumps.

4. fore filter as claimed in claim 1, is characterized in that: the upper end of described supporting network extend horizontally away engaging limit, and the inner side of described air inlet offers slot, and described engaging limit is sticked in described slot.

5. fore filter as claimed in claim 1, is characterized in that: the two ends sidewall of described accommodating cavity offers the depression of taking out described filter course for hand.

6. fore filter as claimed in claim 1, is characterized in that: described support from described air inlet to described gas outlet in the structure narrowed gradually.

7. fore filter as claimed in claim 1, is characterized in that: described filter course comprises cellucotton layer.

8. fore filter as claimed in claim 7, it is characterized in that: described filter course also comprises glass layer and/or PP filter course and/or active carbon layer, described glass layer and/or PP filter course and/or active carbon layer are arranged between described cellucotton layer and described screen pack.

9. fore filter as claimed in claim 1, is characterized in that: the mounting cylinder be socketed with the air intake duct of filter is extended in the rear end of described support, and described mounting cylinder is cylindrical, and described gas outlet is opened in the end of described mounting cylinder.

10. fore filter as claimed in claim 1, is characterized in that: the outer surface of described support is provided with silica gel sheath.