A bag dust collector with multi-stage structure

Abstract

The present invention provides a bag-type dust collector with a multi-segment structure, belonging to the technical field of environmental protection equipment. It includes an exhaust pipe and a filter bag, and a plurality of positioning structures for dividing the filter bag into a plurality of filter chamber sections are arranged alternately on the filter bag. The positioning structure includes an upper chuck and a lower chuck, and the upper chuck and the lower chuck are detachably connected. The lower surface of the upper chuck and the upper surface of the lower chuck are provided with a limiting groove, and the filter bag is provided with positioning ribs corresponding to the positioning structure one by one. The bag body of the segmented position of the filter bag is fixed on the positioning rib, and the upper limiting groove of the upper chuck and the limiting groove on the lower chuck can enclose the limiting notch that can limit the positioning rib. The upper chuck and the lower chuck are both made of iron materials, and a magnetic structure that can adsorb the positioning structure is arranged on the exhaust pipe. The present invention has the advantages of being able to reduce the space occupied by the filter bag, etc.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection equipment and relates to a bag-type dust collector with a multi-stage structure. Background Art

[0002] Bag dust collectors filter exhaust gas through filter bags. It is well known that the larger the filter surface of the filter bag, the longer its maintenance cycle. Since the airflow has a larger buffer environment in the bag, the filter pressure is not too large and the filtering quality is better. However, the larger the filter bag, the more space it occupies. If the filter bag is too small, the maintenance cycle will be greatly shortened and the filtering quality will be reduced. The reduction in filtering quality is mainly due to the increase in the filter hole size of the filter bag, which increases the pressure in the bag, causing some particles near the critical value of filtering to pass through the filter bag and be discharged, affecting the filtering efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a bag dust collector with a multi-stage structure in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to achieve higher filtering quality in a smaller space through a multi-stage filter bag structure.

[0004] The objectives of the present invention can be achieved through the following technical solutions: a bag-type dust collector with a multi-segment structure, characterized in that it includes an exhaust pipe and a filter bag, and a plurality of positioning structures for dividing the filter bag into a plurality of filter chamber sections are alternately arranged on the filter bag, the positioning structure includes an upper chuck and a lower chuck, and the upper chuck and the lower chuck are detachably connected, and a limiting groove is distributed on the lower surface of the upper chuck and the upper surface of the lower chuck, and positioning ribs corresponding to the positioning structure are arranged on the filter bag, and the bag body of the segmented position of the filter bag is fixed on the positioning rib, the upper limit groove on the upper chuck and the limiting groove on the lower chuck can enclose a limiting recess that can limit the positioning rib, the upper chuck and the lower chuck are both made of iron material, and a magnetic structure that can adsorb the positioning structure is arranged on the exhaust pipe.

[0005] Furthermore, the magnetic structure is a permanent magnet strip with an annular structure.

[0006] Furthermore, the magnetic structure is an electromagnet.

[0007] Furthermore, a sealing piece is provided on the inner wall of the upper chuck and the lower chuck, and the sealing piece includes an elastic sheet-shaped sealing film, a through hole is provided on the sealing film, a slip ring fixed to the sealing film is provided in the through hole, and the through hole on the upper chuck is staggered with the through hole on the lower chuck.

[0008] Furthermore, the outlet end of the exhaust pipe has a conical outlet nozzle, and the outlet nozzle has a plurality of outlet holes.

[0009] Furthermore, the filter bag is a cylindrical structure of equal diameter with one end sealed.

[0010] Furthermore, the filter bag is sealed at one end and has a variable diameter structure of a contraction portion corresponding one-to-one to the positioning structure.

[0011] Exhaust gas enters the filter bag from the exhaust pipe inlet. During installation, all positioning structures of the filter bag are sleeved on the exhaust pipe, and only the filter section at one sealed end is located outside the exhaust pipe outlet.

[0012] Exhaust gas continues to enter the first filter section. When the filtration efficiency decreases due to the accumulation of waste residue in the filter section, the air pressure in the filter section will increase. When the external pulling force of the filter bag exceeds the adsorption constraint force between the permanent magnetic strip and the positioning structure, the first positioning structure will detach from the exhaust pipe, and the second filter section will begin to remove dust from the exhaust gas. The above process is repeated until all the filter sections are used and it is time to replace and maintain the filter bags.

[0013] When cleaning the filter bag, the positioning structure can be disassembled, that is, the upper chuck and the lower chuck that are connected by clamping or threading are removed, so that the filter bag can be used for cleaning.

[0014] In order to prevent the used filter segment from still taking in air, thereby causing it to occupy a large space, a structure for sealing the contracted position between the filter ends is provided on the positioning structure, that is, a sealing film is sealed on the upper chuck and the lower chuck. The sealing film is a non-breathable rubber material with elasticity. The front end of the exhaust pipe can be inserted into the two slip rings respectively to realize the connection between the positioning structure and the exhaust pipe. The two slip rings are staggered in position so that when the slip rings are not subject to external forces, the two sealing films can seal the perforations on the upper chuck and the lower chuck to achieve sealing between adjacent filter segments. This is also a condition to ensure that the increase in air pressure can realize the automatic replacement of the filter segments.

[0015] The electromagnet realizes the structure of electromagnetism through coil and armature block, so that the magnetic force is adjustable, the filter segment switching can be actively controlled by power off, etc., and the resistance can be controlled to adjust the timing of filter segment switching.

[0016] The structure of the filter bag can be adjusted as needed. For example, a variable diameter structure with a contraction portion is provided. Although the filtering surface will be relatively small, it can ensure that the filter bag is in a flat and unfolded state, avoiding wrinkles in the filter bag and improving the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the bag filter when it is working at the front-end filtering section.

[0018] Figure 2 It is a schematic diagram of the structure of the bag dust collector after switching the filter section.

[0019] Figure 3 yes Figure 1 Enlarged view of part A in the figure.

[0020] Figure 4 yes Figure 2 Enlarged view of part B in the middle.

[0021] Figure 5 It is a schematic diagram of the structure of a filter bag with a variable diameter structure.

[0022] In the figure, 1, exhaust pipe; 11, air outlet nozzle; 12, air outlet hole; 2, filter bag; 21, contraction part; 3, positioning structure; 31, upper chuck; 32, lower chuck; 33, limit groove; 34, positioning rib; 35, permanent magnetic strip; 36, sheet sealing film; 37, slip ring. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] like Figures 1 to 4 As shown, it includes an exhaust pipe 1 and a filter bag 2, and a plurality of positioning structures 3 for dividing the filter bag 2 into a plurality of filter chamber sections are alternately arranged on the filter bag 2, the positioning structure 3 includes an upper chuck 31 and a lower chuck 32, the upper chuck 31 and the lower chuck 32 are detachably connected, and a limiting groove 33 is distributed on the lower surface of the upper chuck 31 and the upper surface of the lower chuck 32, and positioning ribs 34 corresponding to the positioning structure 3 are arranged on the filter bag 2, and the bag body of the segmented position of the filter bag 2 is fixed on the positioning rib 34, the upper limiting groove 33 on the upper chuck 31 and the limiting groove 33 on the lower chuck 32 can enclose a limiting recess that can limit the positioning rib 34, the upper chuck 31 and the lower chuck 32 are both made of iron material, and a magnetic structure that can adsorb the positioning structure 3 is arranged on the exhaust pipe 1.

[0025] The magnetic structure is a permanent magnet strip 35 of an annular structure, and the magnetic structure can also be an electromagnet.

[0026] A sealing piece is provided on the inner wall of the upper chuck 31 and the lower chuck 32. The sealing piece includes an elastic sheet-shaped sealing film 36. A through hole is provided on the sealing film. A slip ring 37 fixed to the sealing film is provided in the through hole. The through hole on the upper chuck 31 and the through hole on the lower chuck 32 are staggered.

[0027] The exhaust pipe 1 has a conical exhaust nozzle 11 at the exhaust end thereof, and the exhaust nozzle 11 has a plurality of exhaust holes 12 .

[0028] The filter bag 2 is a cylindrical structure with one end sealed.

[0029] like Figure 5As shown, the filter bag 2 may also be a variable diameter structure with one end sealed and a contraction portion 21 corresponding one-to-one to the positioning structure 3 .

[0030] Exhaust gas enters the filter bag 2 from the inlet of the exhaust pipe 1. During installation, all the positioning structures 3 of the filter bag 2 are sleeved on the exhaust pipe 1, and only the filter section at one sealed end is located outside the outlet of the exhaust pipe 1.

[0031] The waste gas continues to enter the first filter section. When the filtration efficiency of the filter section decreases due to the accumulation of waste residue, the air pressure in the filter section will increase. When the external pulling force of the filter bag 2 exceeds the adsorption constraint force between the permanent magnetic strip 35 and the positioning structure 3, the first positioning structure 3 will be separated from the exhaust pipe 1, and the second filter section will begin to remove dust from the waste gas. The above process is repeated until all the filter sections are used and it is time to replace and maintain the filter bag 2.

[0032] When cleaning the filter bag 2, the positioning structure 3 can be disassembled, that is, the upper chuck 31 and the lower chuck 32 that are clamped or threaded are removed, so that the filter bag 2 can be used for cleaning.

[0033] In order to prevent the used filter segment from still taking in air, thereby causing it to occupy a large space, a structure for sealing the contracted position between the filter ends is provided on the positioning structure 3, that is, a sealing film is sealed on the upper chuck 31 and the lower chuck 32. The sealing film is a non-breathable rubber material with elasticity. The front end of the exhaust pipe 1 can be inserted into the two slip rings 37 respectively to achieve the connection between the positioning structure 3 and the exhaust pipe 1. The two slip rings 37 are staggered so that when the slip rings 37 are not subjected to external forces, the two sealing films can seal the perforations on the upper chuck 31 and the lower chuck 32 to achieve sealing between adjacent filter segments. This is also a condition to ensure that the increase in air pressure can achieve automatic replacement of the filter segments.

[0034] The electromagnet realizes the structure of electromagnetism through coil and armature block, so that the magnetic force is adjustable, the filter segment switching can be actively controlled by power off, etc., and the resistance can be controlled to adjust the timing of filter segment switching.

[0035] The structure of the filter bag 2 can be adjusted as needed. For example, a variable diameter structure with a contraction portion 21 is provided. Although the filtering surface will be relatively small, it can ensure that the filter bag 2 is in a flat and unfolded state, avoiding wrinkles in the filter bag 2 and improving the filtering effect.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A bag filter with a multi-stage structure, characterized in that: The invention comprises an exhaust pipe (1) and a filter bag (2), wherein a plurality of positioning structures (3) for dividing the filter bag (2) into a plurality of filter chamber sections are arranged alternately on the filter bag (2), wherein the positioning structure (3) comprises an upper chuck (31) and a lower chuck (32), wherein the upper chuck (31) and the lower chuck (32) are detachably connected, wherein a limiting groove (33) is distributed on the lower surface of the upper chuck (31) and the upper surface of the lower chuck (32), wherein the filter bag (2) is provided with positioning ribs (34) corresponding to the positioning structures (3) in a one-to-one manner, wherein the bag body of the filter bag (2) at the segmented position is fixed on the positioning ribs (34), and the upper limit groove (33) of the upper chuck (31) and the limiting groove (33) on the lower chuck (32) are combined to form a filter chamber. The upper chuck (31) and the lower chuck (32) are both made of iron material, and the exhaust pipe (1) is provided with a magnetic structure capable of adsorbing the positioning structure (3); the inner walls of the upper chuck (31) and the lower chuck (32) are both provided with a sealing piece, and the sealing piece includes an elastic sheet-shaped sealing film (36), a through hole is formed on the sealing film, and a slip ring (37) fixed to the sealing film is provided in the through hole, and the through hole on the upper chuck (31) and the through hole on the lower chuck (32) are staggered; the exhaust pipe (1) has a conical exhaust nozzle (11) at the exhaust end, and the exhaust nozzle (11) has a plurality of exhaust holes (12).

2. The multi-stage bag filter according to claim 1, characterized in that: The magnetic structure is a permanent magnetic strip (35) in an annular structure.

3. The multi-stage bag filter according to claim 1, characterized in that: The magnetic structure is an electromagnet.

4. A bag filter with a multi-stage structure according to claim 1, 2 or 3, characterized in that: The filter bag (2) is a cylindrical structure with equal diameter and sealed at one end.

5. A bag filter with a multi-stage structure according to claim 1, 2 or 3, characterized in that: The filter bag (2) is sealed at one end and has a variable diameter structure with a contraction portion (21) corresponding one-to-one with the positioning structure (3).

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