Small dust remover with secondary air filter arranged on back

Abstract

The utility model belongs to the field of environment-friendly dust removal equipment, and particularly relates to a small-sized dust remover with a secondary air filter arranged on the back, which comprises a small-sized dust remover, the secondary air filter is arranged on the back of the small-sized dust remover, the secondary air filter comprises a shell, a filter element is arranged in the shell, an air inlet is arranged at the upper end of the shell, and an air outlet is arranged at the lower end of the shell. A perforated plate is arranged on the front face of the shell and serves as an air outlet, a fixing flange is arranged on the back face of the shell and fixedly connected with the back face of the small dust remover, the two filter elements are vertically distributed in the shell, and the front faces of the filter elements face the direction of the fixing flange. And the air inlet is connected with a silencing pipe air outlet of the small dust remover through a ventilation pipe. The device can be used for in-situ dust collection and secondary dust removal of'clean workshops' or individual or several dust pollution source points of the'clean workshops', and the problem that the space height is limited by the height of the workshops is solved.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection dust removal equipment, and in particular, it is a small dust collector with a two-stage air filter placed on the back. Background Technology

[0002] A utility model patent entitled "Integrated Cabinet-Type Small Offline Dust Collector" with patent number "201920050356.4" discloses a small dust collector with a secondary air filter placed on top, but the specific configuration is not explained, and it cannot be implemented when the space height is limited by the workshop height. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this utility model proposes a small dust collector with a secondary air filter placed on the back. It can be used for on-site dust collection and secondary dust removal at individual or several dust pollution sources in a "clean workshop" or "hygiene workshop," solving the problem of height limitations imposed by the workshop's height. The technical problem to be solved by this utility model is achieved through the following technical solution:

[0004] A small dust collector with a secondary air filter located at the back includes a small dust collector, a secondary air filter installed at the back of the small dust collector, the secondary air filter including a housing, a filter element installed inside the housing, an air inlet at the upper end of the housing, a perforated plate on the front of the housing serving as an air outlet, a fixed flange on the back of the housing, the fixed flange being fixedly connected to the back of the small dust collector, two filter elements distributed vertically inside the housing, with the front of the filter elements facing the fixed flange, and the air inlet connected to the air outlet of the silencer pipe of the small dust collector via a ventilation pipe.

[0005] Furthermore, the fixed flange is a No. 3 angle steel inner flange, and the size of the fixed flange is consistent with the inner side of the shell.

[0006] Furthermore, a sealing gasket is installed between the fixed flange and the back of the small dust collector.

[0007] Furthermore, an inner partition is provided in the upper part of the shell. The inner partition is fixedly connected to the top of the shell through a sealing plate. The inner partition, the sealing plate, and the upper part of the shell form an airflow diffusion channel.

[0008] Specifically, the distance between the inner partition and the top of the shell is 86 mm.

[0009] Specifically, the distance between the inner partition and the fixed flange is 50mm.

[0010] Even better, it also includes a filter element holder, with a 2-3mm gap between the filter element holder and the filter element.

[0011] Even better, the filter element is locked to the filter element holder by a fixing screw, a central asymmetrical plate, and a fixing bracket.

[0012] This invention can be used for on-site dust collection and secondary dust removal at individual or several dust pollution sources in a "clean workshop" or "cleanroom", solving the problem of space height being limited by workshop height. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 Side view;

[0015] Figure 3 This is a schematic diagram of the internal structure of a secondary air filter;

[0016] Figure 4 for Figure 3 A top view without the air inlet and inner partition;

[0017] Figure 5 for Figure 3 The left view. Detailed Implementation

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Side view, Figure 2 The internal structure diagram of the intermediate and secondary air filters is shown. Figure 3 This is a schematic diagram of the internal structure of a secondary air filter; Figure 4 for Figure 3 A top view without the air inlet and inner partition; Figure 5 for Figure 3 The left view. (e.g.) Figures 1 to 5 As shown, a small dust collector with a secondary air filter placed on the back includes a small dust collector 20. A secondary air filter is installed on the back of the small dust collector 20. The secondary air filter includes a housing 1, a filter element 2 is installed inside the housing 1, an air inlet 3 is provided at the upper end of the housing 1, a perforated plate 4 is on the front of the housing 1, the perforated plate 4 is an air outlet, and a fixing flange 5 is on the back of the housing 1. The fixing flange 5 is fixedly connected to the back of the small dust collector 20. There are two filter elements 2, which are distributed vertically inside the housing 1. The front of the filter element 2 faces the fixing flange 5. The air inlet 3 is connected to the silencer pipe outlet 21 of the small dust collector 20 through a ventilation pipe 6.

[0019] The fixed flange 5 is a No. 3 angle steel inner flange. The size of the fixed flange 5 is consistent with the inner side of the shell 1. A sealing gasket 13 is set between the fixed flange 5 and the back of the small dust collector 20. In this embodiment, the air inlet 3 is set at the upper left end. In order to avoid the existing accessories of the small dust collector 20, the ventilation pipe 6 in this embodiment has a 90° elbow, two bends and a flared mouth.

[0020] An inner partition 7 is provided on the upper part of the housing 1. The inner partition 7 is fixedly connected to the top of the housing 1 through a sealing plate 8. The inner partition 7, the sealing plate 8, and the upper part of the housing 1 form an airflow diffusion channel. The distance H between the inner partition 7 and the top of the housing 1 is 86mm, and the distance L between the inner partition 7 and the fixed flange 5 is 50mm. In this embodiment, a perforated plate fixing bracket 14 is provided between the upper and lower filter elements 2. The perforated plate fixing bracket 14 is fixedly connected to the perforated plate 4.

[0021] It also includes a filter element holder 9, which maintains a gap of 2-3mm with the filter element 2. The filter element holder 9 is made of 30×60mm square tubing, with the 60mm wide side as the vertical surface to form a large rectangular frame. Then, a 30×60mm square tubing is used to divide the large rectangular frame into two smaller rectangular frames at the top and bottom. The large rectangular frame is then embedded in the housing 1 and welded to seal it. Two smaller rectangular frames are made of 20×20mm square tubing with the same spacing as the smaller rectangular frames. The two smaller rectangular frames are then embedded in the two smaller rectangular frames and welded to seal it. The bottom of the frame is on the same vertical surface as the large rectangular frame. The two smaller rectangular frames form the base, and the two smaller rectangular frames form the filter element holder 9.

[0022] The filter element 2 is locked to the filter element fixing frame 9 by the fixing screw 10 and the central asymmetric plate 11. The fixing screw 10 is vertically welded to the 30mm surface of the 30×60mm square tube. The central asymmetric plate 11 remains vertically downward under the action of gravity when it is not fixed by the nut, which facilitates the filter element 2 to be pushed into the filter element fixing frame without being blocked by the central asymmetric plate 11. The supporting iron plate 12 is a small iron plate of 5-6mm. It is welded to the inner side of the housing 1 at the position corresponding to the fixing screw 10. The height is consistent with the depth of the filter element, which ensures that the two ends of the central asymmetric plate 11 can be stably locked to the filter element. After the filter element 2 is put in, the central asymmetric plate 11 is placed in a horizontal position and tightened with the nut. The contact surface between the filter element 2 and the base is equipped with a sealing gasket. Finally, the sealing gasket of the filter element 2 is pressed and sealed to the base.

[0023] This invention solves the problem of space height being limited by workshop height, and the secondary air filter is placed on the back of the small dust collector, making the overall appearance more aesthetically pleasing.

[0024] Clean air filtered by the primary dust collector's filter cloth then passes through a silencer elbow device for noise reduction before reaching the silencer elbow outlet. From there, it enters housing 1 via a connecting pipeline, first reaching the airflow diffusion channel to ensure even airflow distribution. Housing 1 forms a tightly sealed filter surface, requiring all clean air to pass through filter element 2 before reaching the outlet. Thus, the air filtered by filter element 2 achieves the same cleanliness level as the filter element itself, resulting in clean air. For example, if the filter element's cleanliness level is U15, then U15 corresponds to "ISO Class 6 (Class 1000) clean air".

[0025] In summary, this utility model can be used for on-site dust collection and secondary dust removal at individual or several dust pollution sources in "clean workshops" or "cleanrooms", and provides various levels of clean air as needed, realizing on-site internal circulation, greatly reducing the investment in centralized dust control equipment, greatly facilitating equipment layout and configuration; and solving the problem of space height being limited by workshop height.

Claims

1. A small dust collector with a secondary air filter disposed on the back, comprising a small dust collector, characterized in that, A secondary air filter is installed at the back of the small dust collector. The secondary air filter includes a housing, a filter element inside the housing, an air inlet at the upper end of the housing, a perforated plate on the front of the housing serving as an air outlet, and a fixed flange on the back of the housing, which is fixedly connected to the back of the small dust collector. There are two filter elements, which are distributed vertically inside the housing, with the front of the filter elements facing the fixed flange. The air inlet is connected to the air outlet of the silencer pipe of the small dust collector through a ventilation pipe.

2. The small dust collector with a secondary air filter located at the back as described in claim 1, characterized in that, The fixed flange is a No. 3 angle steel inner flange, and the size of the fixed flange is consistent with the inner side of the shell.

3. The small dust collector with a secondary air filter located at the back as described in claim 1, characterized in that, A sealing gasket is provided between the fixed flange and the back of the small dust collector.

4. The small dust collector with a secondary air filter located at the back as described in claim 1, characterized in that, An inner partition is provided on the upper part of the housing. The inner partition is fixedly connected to the top of the housing through a sealing plate. The inner partition, the sealing plate, and the upper part of the housing form an airflow diffusion channel.

5. The small dust collector with a secondary air filter located at the back as described in claim 4, characterized in that, The distance between the inner partition and the top of the shell is 86 mm.

6. The small dust collector with a secondary air filter located at the back as described in claim 4, characterized in that, The distance between the inner partition and the fixed flange is 50mm.

7. The small dust collector with a secondary air filter located at the back as described in claim 1, characterized in that, It also includes a filter element holder, with a 2-3mm gap between the filter element holder and the filter element.

8. The small dust collector with a secondary air filter located at the back as described in claim 7, characterized in that, The filter element is locked to the filter element fixing frame by a fixing screw and a central asymmetric plate.

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