CN114452736A - High temperature dust remover card fixed knot constructs - Google Patents
High temperature dust remover card fixed knot constructs Download PDFInfo
- Publication number
- CN114452736A CN114452736A CN202210014511.3A CN202210014511A CN114452736A CN 114452736 A CN114452736 A CN 114452736A CN 202210014511 A CN202210014511 A CN 202210014511A CN 114452736 A CN114452736 A CN 114452736A
- Authority
- CN
- China
- Prior art keywords
- angle steel
- card
- box body
- filter
- pattern plate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
Abstract
The invention relates to the technical field of high-temperature dust collectors, in particular to a pattern plate fixing structure of a high-temperature dust collector; including filtering the box, the card, chimney filter and four fixed units, every fixed unit all includes angle steel and dog-ear angle steel, at first after the inside wall welding of the one side of angle steel and filtration box, place the card in the top of angle steel, then place the dog-ear angle steel in the top of card, the last one end that will dog-ear angle steel and the upper surface welding of card, the other end that will dog-ear angle steel and the inside wall welding of filtration box, the inflation volume that takes place when the card under high temperature is absorbed by dog-ear angle steel elasticity, the inside wall and the card that do not filter the box produce stress, avoid box deformation or welding seam to split, produce gas leakage phenomenon, can lead the inside chimney filter that hangs to produce cracked phenomenon to take place when serious.
Description
Technical Field
The invention relates to the technical field of high-temperature dust collectors, in particular to a pattern plate fixing structure of a high-temperature dust collector.
Background
Along with the gradually strict requirements on flue gas emission indexes, the design difficulty of the high-temperature flue gas dust remover is gradually highlighted. The ceramic filter tube dust remover is a major branch of a high-temperature dust removal technology at present, the main body of the ceramic filter tube dust remover is of a box body type structure, a filter tube is hung on an inner pattern plate, the pattern plate is directly connected with a wall plate, when high-temperature smoke enters a box body, the dust removal and filtration are carried out through the filter tube, however, the pattern plate for hanging the dust removal filter tube is made of a carbon steel plate, the structure of the ceramic filter tube dust remover is easy to deform under high temperature, the length of the pattern plate is 2.5m according to a common box body, if the temperature reaches 250 ℃, the expansion amount reaches 26mm, if the pattern plate is directly welded with the wall plate, the expansion amount leads the wall plate of the box body to deform on one hand, and leads the pattern plate to bend on the other hand, both of the ceramic filter tube dust remover are easy to cause the deformation of the box body or the crack, the air leakage phenomenon is generated, and the filter tube hung inside can be cracked seriously.
Disclosure of Invention
The invention aims to provide a high-temperature dust collector pattern plate fixing structure, which solves the problems that in the prior art, a pattern plate is directly welded with a wall plate, when the temperature reaches 250 ℃, the expansion amount reaches 26mm, on one hand, the wall plate of a box body is deformed, on the other hand, the pattern plate is bent, both the deformation and the weld joint of the box body are easy to cause deformation or the crack of the weld joint, the air leakage phenomenon is generated, and the breakage of an internally hung filter tube can be caused in serious cases.
In order to achieve the purpose, the invention provides a high-temperature dust collector pattern plate fixing structure which comprises a filtering box body, a pattern plate, a filter pipe and four fixing units, wherein the bottom of the filtering box body is provided with a flue gas inlet, the top of the filtering box body is provided with a flue gas outlet, the pattern plate is positioned in the filtering box body, the filter pipe is arranged on the pattern plate in a hanging manner, the fixing units are arranged on the periphery of the pattern plate, and each fixing unit is used for connecting the pattern plate with the inner wall of the filtering box body; every fixed unit all includes angle steel and dog-ear angle steel, the angle steel with dog-ear angle steel all is right angle shape structure, the one end of angle steel with the bottom surface of card is laminated mutually, the other end of angle steel with filter the inside wall welding of box, the angle steel is located the card is close to one side of flue gas entry, the one end of dog-ear angle steel with the upper surface welding of card, the other end of dog-ear angle steel with filter the inside wall welding of box, dog-ear angle steel is located the card is close to the one end of exhanst gas outlet.
Firstly, welding one surface of the angle steel with the inner side wall of the filtering box body, then placing the pattern plate above the angle steel to enable the other surface of the angle steel to be attached to the lower surface of the pattern plate, then placing the angle steel above the pattern plate, finally welding one end of the angle steel with the upper surface of the pattern plate, welding the other end of the angle steel with the inner side wall of the filtering box body, wherein the expansion amount of the pattern plate generated at high temperature is elastically absorbed by the angle steel, so that stress is not generated on the inner side wall of the filtering box body and the inside of the pattern plate, the safety of an internal structure can be effectively protected, the phenomenon that the box body is deformed or a welding line cracks to generate air leakage, and the phenomenon that an internally suspended filter pipe is cracked can be generated seriously.
Each fixing unit further comprises square steel, the square steel is located between the folded angle steel and the inner side wall of the filtering box body, one face of the square steel is attached to the upper surface of the pattern plate, and the adjacent face of the pattern plate is welded to the inner side wall of the filtering box body.
After the angle steel is welded and the pattern plate is placed above the angle steel, the square steel is placed on the periphery of the upper surface of the pattern plate, one surface, attached to the filtering box body, of the square steel is welded, and therefore the pattern plate is clamped through the square steel, and the position of the pattern plate is fixed.
Wherein, the both ends of hem angle steel are provided with first stabilizer blade and second stabilizer blade respectively, first stabilizer blade with the hem angle steel is close to the one end mutually perpendicular of card, the second stabilizer blade with the hem angle steel is close to the one end mutually perpendicular of the inside wall of filtering the box, first stabilizer blade with the upper surface welding of card, the second stabilizer blade with the inside wall welding of filtering the box.
The both ends of hem angle steel are provided with respectively first stabilizer blade and second stabilizer blade, will first stabilizer blade with the upper surface welding of card is in the same place, will the second stabilizer blade with the inside wall welding of filtering the box is in the same place, makes the welding more convenient during the hem angle steel.
The angle steel is far away from one end of the pattern plate is provided with a first clamping block, a first clamping groove is formed in the inner side wall of the filtering box body, the first clamping groove is located below the pattern plate, and the first clamping block is matched with the first clamping groove.
Be provided with on the angle steel first fixture block, be provided with on the inside wall of filtering the box first draw-in groove is when the welding during the angle steel, will first fixture block card is gone into extremely in the first draw-in groove, thereby it is right the angle steel advances line location for it is more accurate during the welding.
The square steel is close to one end of the inner side wall of the filtering box body is provided with a second clamping block, a second clamping groove is further formed in the inner side wall of the filtering box body, the second clamping groove is located below the welding position of the folding angle steel and the filtering box body, and the second clamping block is matched with the second clamping groove.
The square steel is provided with the second clamping block, the filtering box body is provided with the second clamping groove, and when the square steel is welded, the second clamping block is clamped into the second clamping groove, so that the square steel is positioned, and the welding is more accurate.
The flower plate is provided with a plurality of through holes, and the filter pipes are arranged at the through holes in a hanging mode.
The flower plate is provided with a plurality of through holes, and the filtering pipe is hung at each through hole, so that the dust removal performance of the filtering box body is improved.
The invention relates to a high-temperature dust collector pattern plate fixing structure, which comprises a filter box body, a pattern plate, a filter pipe and four fixing units, wherein each fixing unit comprises angle steel and a folded angle steel, one surface of the angle steel is welded with the inner side wall of the filter box body, the pattern plate is placed above the angle steel, the other surface of the angle steel is attached to the lower surface of the pattern plate, the folded angle steel is placed above the pattern plate, one end of the folded angle steel is welded with the upper surface of the pattern plate, the other end of the folded angle steel is welded with the inner side wall of the filter box body, when the expansion amount of the pattern plate generated at high temperature is absorbed by the folded angle steel in a flexible way, the stress is not generated on the inner side wall of the filter box body and the inner part of the pattern plate, the safety of an internal structure can be effectively protected, and the deformation of the box body or the crack of a welding line can be avoided, the air leakage phenomenon is generated, and the phenomenon that the filter tube hung in the inner part is broken can be generated in serious cases.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a sectional view showing an internal structure of a filter housing according to the present invention.
Fig. 2 is an enlarged view of a portion of the structure of fig. 1 a according to the present invention.
Fig. 3 is a schematic structural diagram of a fixing unit provided in the present invention.
1-a filtering box body, 2-a pattern plate, 3-a filtering pipe, 4-a fixing unit, 5-a smoke inlet, 6-a smoke outlet, 7-angle steel, 8-folded angle steel, 9-square steel, 10-a first supporting leg, 11-a second supporting leg, 12-a first clamping block, 13-a first clamping groove, 14-a second clamping block, 15-a second clamping groove, 16-a through hole, 17-a third clamping block, 18-a third clamping groove, 19-a first bump, 20-a second bump and 21-a third bump.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1 to 3, the invention provides a high-temperature dust collector pattern plate fixing structure, which includes a filter box body 1, a pattern plate 2, a filter tube 3 and four fixing units 4, wherein a flue gas inlet 5 is arranged at the bottom of the filter box body 1, a flue gas outlet 6 is arranged at the top of the filter box body 1, the pattern plate 2 is located inside the filter box body 1, the filter tube 3 is arranged on the pattern plate 2 in a hanging manner, the fixing units 4 are arranged around the pattern plate 2, and each fixing unit 4 is used for connecting the pattern plate 2 with the inner wall of the filter box body 1.
Every fixed unit 4 all includes angle steel 7 and hem angle steel 8, angle steel 7 with hem angle steel 8 all is the right angle shape structure, angle steel 7's one end with the bottom surface of card 2 laminates mutually, angle steel 7's the other end with filter box 1's inside wall welding, angle steel 7 is located card 2 is close to one side of flue gas entry 5, hem angle steel 8's one end with card 2's upper surface welding, hem angle steel 8's the other end with filter box 1's inside wall welding, hem angle steel 8 is located card 2 is close to the one end of exhanst gas outlet 6.
In the present embodiment, first, after one surface of the angle steel 7 is welded to the inner wall of the filter case 1, the pattern plate 2 is placed above the angle steel 7, so that the other surface of the angle steel 7 is attached to the lower surface of the pattern plate 2, then the folded angle steel 8 is placed above the flower plate 2, finally one end of the folded angle steel 8 is welded with the upper surface of the flower plate 2, the other end of the folded angle steel 8 is welded with the inner side wall of the filtering box body 1, when the expansion amount of the pattern plate 2 at high temperature is elastically absorbed by the folding angle steel 8, no stress is generated on the inner side wall of the filter box body 1 and the interior of the pattern plate 2, the safety of the internal structure can be effectively protected, the phenomenon of air leakage caused by deformation of the box body or crack of a welding line is avoided, and the phenomenon that the filter tube 3 hung inside is broken when the air leakage is serious is caused.
Every fixed unit 4 all still includes square steel 9, square steel 9 is located hem angle steel 8 with between the inside wall of filtering box 1, square steel 9 one side with the laminating of the upper surface of card 2, square steel 9 with the adjacent one side of card 2 with the inside wall welding of filtering box 1.
In this embodiment, after the angle steel 7 is welded and the pattern plate 2 is placed above the angle steel 7, the square steel 9 is placed around the upper surface of the pattern plate 2, and one surface of the square steel 9, which is attached to the filter box 1, is welded, so that the pattern plate 2 is clamped by the square steel 9, and the position of the pattern plate 2 is fixed.
The both ends of hem angle steel 8 are provided with first stabilizer blade 10 and second stabilizer blade 11 respectively, first stabilizer blade 10 with hem angle steel 8 is close to the one end mutually perpendicular of card 2, second stabilizer blade 11 with hem angle steel 8 is close to the one end mutually perpendicular of the inside wall of filter box 1, first stabilizer blade 10 with the upper surface welding of card 2, second stabilizer blade 11 with the inside wall welding of filter box 1.
In this embodiment, the both ends of hem angle steel 8 are provided with respectively first stabilizer blade 10 and second stabilizer blade 11, will first stabilizer blade 10 with the upper surface welding of card 2 is in the same place, will second stabilizer blade 11 with the inside wall welding of filtering box 1 is in the same place, makes the welding more convenient during the hem angle steel 8.
One end, far away from the card 2, of the angle steel 7 is provided with a first clamping block 12, a first clamping groove 13 is formed in the inner side wall of the filtering box body 1, the first clamping groove 13 is located below the card 2, and the first clamping block 12 is matched with the first clamping groove 13.
In this embodiment, the angle steel 7 is provided with the first clamping block 12, the inner side wall of the filter box body 1 is provided with the first clamping groove 13, and when the angle steel 7 is welded, the first clamping block 12 is clamped into the first clamping groove 13, so that the angle steel 7 is positioned, and the welding is more accurate.
The square steel 9 is close to one end of the inner side wall of the filtering box body 1 is provided with a second clamping block 14, a second clamping groove 15 is further formed in the inner side wall of the filtering box body 1, the second clamping groove 15 is located below the welding position of the folding angle steel 8 and the filtering box body 1, and the second clamping block 14 is matched with the second clamping groove 15.
In this embodiment, the square steel 9 is provided with the second clamping block 14, the filtering box body 1 is provided with the second clamping groove 15, and when the square steel 9 is welded, the second clamping block 14 is clamped into the second clamping groove 15, so that the square steel 9 is positioned, and the welding is more accurate.
The flower plate 2 is provided with a plurality of through holes 16, and each through hole 16 is provided with the filter tube 3 in a hanging manner.
In the present embodiment, the plurality of through holes 16 are provided in the faceplate 2, and the filter tube 3 is suspended in each through hole, so as to improve the dust removal performance of the filter box 1.
Every all still be provided with third fixture block 17 on the angle steel 8 of dog-ear, third fixture block 17 is located angle steel 8 of dog-ear is close to the one end of second stabilizer blade 11, still be provided with third draw-in groove 18 on the inside wall of filter box 1, third fixture block 17 with third draw-in groove 18 looks adaptation.
In this embodiment, be provided with on the hem angle steel 8 third fixture block 17, the inside wall of filtering box 1 is provided with third draw-in groove 18, when the welding during hem angle steel 8, will third fixture block 17 card is gone into to in the third draw-in groove 18, thereby it is right hem angle steel 8 advances line location for it is more accurate during the welding.
In this embodiment, the third engaging groove 18 is located on the first protrusion 19, the second engaging groove 15 is located on the second protrusion 20, and the first engaging groove 13 is located on the third protrusion 21, so as to prevent a gap from being generated on an inner sidewall of the filter housing 1, which may reduce the strength of the wall plate of the filter housing 1.
Claims (6)
1. The high-temperature dust collector pattern plate fixing structure is characterized by comprising a filtering box body, a pattern plate, filter pipes and four fixing units, wherein a smoke inlet is formed in the bottom of the filtering box body, a smoke outlet is formed in the top of the filtering box body, the pattern plate is located inside the filtering box body, the filter pipes are arranged on the pattern plate in a hanging mode, the fixing units are arranged on the periphery of the pattern plate, and each fixing unit is used for connecting the pattern plate with the inner wall of the filtering box body; every fixed unit all includes angle steel and dog-ear angle steel, the angle steel with dog-ear angle steel all is right angle shape structure, the one end of angle steel with the bottom surface of card is laminated mutually, the other end of angle steel with filter the inside wall welding of box, the angle steel is located the card is close to one side of flue gas entry, the one end of dog-ear angle steel with the upper surface welding of card, the other end of dog-ear angle steel with filter the inside wall welding of box, dog-ear angle steel is located the card is close to the one end of exhanst gas outlet.
2. The high temperature dust collector card fixing structure of claim 1, wherein each fixing unit further comprises a square steel, the square steel is located between the folding angle steel and the inner side wall of the filter box body, one surface of the square steel is attached to the upper surface of the card, and the surface of the square steel adjacent to the card is welded to the inner side wall of the filter box body.
3. The high temperature dust collector card fixing structure according to claim 1, wherein a first leg and a second leg are respectively provided at both ends of the angle steel, the first leg and one end of the angle steel near the card are perpendicular to each other, the second leg and one end of the angle steel near the inner side wall of the filter box are perpendicular to each other, the first leg is welded to the upper surface of the card, and the second leg is welded to the inner side wall of the filter box.
4. The high-temperature dust collector faceplate fixing structure of claim 1, wherein one end of the angle steel, which is far away from the faceplate, is provided with a first clamping block, the inner side wall of the filter box body is provided with a first clamping groove, the first clamping groove is positioned below the faceplate, and the first clamping block is matched with the first clamping groove.
5. The high-temperature dust collector card fixing structure of claim 2, wherein one end of the square steel close to the inner side wall of the filter box body is provided with a second clamping block, the inner side wall of the filter box body is further provided with a second clamping groove, the second clamping groove is located below the welding position of the folding angle steel and the filter box body, and the second clamping block is matched with the second clamping groove.
6. The high temperature dust collector faceplate fixing structure of claim 5, wherein a plurality of through holes are provided in the faceplate, and the filter tube is suspended at each of the through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210014511.3A CN114452736A (en) | 2022-01-07 | 2022-01-07 | High temperature dust remover card fixed knot constructs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210014511.3A CN114452736A (en) | 2022-01-07 | 2022-01-07 | High temperature dust remover card fixed knot constructs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114452736A true CN114452736A (en) | 2022-05-10 |
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ID=81410643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210014511.3A Pending CN114452736A (en) | 2022-01-07 | 2022-01-07 | High temperature dust remover card fixed knot constructs |
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| CN (1) | CN114452736A (en) |
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| JPS59158856A (en) * | 1982-12-20 | 1984-09-08 | フランダ−ズ・フイルタ−ズ・インコ−ポレ−テツド | Support grid structure and assembling thereof |
| CN202265949U (en) * | 2011-08-17 | 2012-06-06 | 江苏舜天光伏系统有限公司 | Support for fixing and installing solar photovoltaic module on a small-slope color steel tile roof |
| CN204219951U (en) * | 2014-11-06 | 2015-03-25 | 西安西矿环保科技有限公司 | A kind of resistant to elevated temperatures free-extension card |
| CN104607765A (en) * | 2014-12-12 | 2015-05-13 | 湖北源盛钢构有限公司 | Assembly welding process of box-shaped steel formed by interlocking forming of steel angles and full penetrating of main welds |
| CN106049989A (en) * | 2016-07-21 | 2016-10-26 | 深圳市洪星宏电子科技有限公司 | Electronic lock mounting mechanism and mounting method thereof |
| CN207137560U (en) * | 2017-06-20 | 2018-03-27 | 江西省龙晨管业科技发展有限责任公司 | Hard polyethylene tubing produces special dust seperator |
| CN108320872A (en) * | 2018-04-08 | 2018-07-24 | 四川明鑫电器电瓷有限公司 | A kind of insulator fixing device facilitating adjusting |
| CN208825305U (en) * | 2018-08-06 | 2019-05-07 | 郑州新农村蔬菜食品有限公司 | A kind of angle steel positioning device for perforating press |
| CN109847478A (en) * | 2019-03-22 | 2019-06-07 | 无锡红旗除尘设备有限公司 | A kind of cluster type modularization filter bay assembly can satisfy minimum discharge requirement |
| CN209549006U (en) * | 2019-01-25 | 2019-10-29 | 上海弗来应实业有限公司 | A kind of high temperature resistant filtration dust catcher |
| CN210388096U (en) * | 2019-07-03 | 2020-04-24 | 李丽英 | Welding set is assembled to stagnant water steel sheet |
| CN211435428U (en) * | 2019-12-25 | 2020-09-08 | 江苏丰尚智能科技有限公司 | Square pulse cloth tube dust remover box structure |
| CN213115105U (en) * | 2020-08-21 | 2021-05-04 | 山西华亿众成建材有限公司 | Concrete wall structure with built-in heat-insulating layer |
| CN214739900U (en) * | 2021-02-01 | 2021-11-16 | 中建八局西北建设有限公司 | Closed steel-wood combined stair template |
| CN215232918U (en) * | 2021-05-17 | 2021-12-21 | 邢台市天元星食品设备有限公司 | Welding fume purification device for movable arm type mechanical workshop |
| CN215310929U (en) * | 2021-07-08 | 2021-12-28 | 北京国能华瑞环保科技发展有限公司 | Dust remover cylinder filter bag convenient to dismouting |
-
2022
- 2022-01-07 CN CN202210014511.3A patent/CN114452736A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1497215A1 (en) * | 1964-09-30 | 1969-05-14 | Rank Xerox Ltd | Filter device |
| JPS59158856A (en) * | 1982-12-20 | 1984-09-08 | フランダ−ズ・フイルタ−ズ・インコ−ポレ−テツド | Support grid structure and assembling thereof |
| CN202265949U (en) * | 2011-08-17 | 2012-06-06 | 江苏舜天光伏系统有限公司 | Support for fixing and installing solar photovoltaic module on a small-slope color steel tile roof |
| CN204219951U (en) * | 2014-11-06 | 2015-03-25 | 西安西矿环保科技有限公司 | A kind of resistant to elevated temperatures free-extension card |
| CN104607765A (en) * | 2014-12-12 | 2015-05-13 | 湖北源盛钢构有限公司 | Assembly welding process of box-shaped steel formed by interlocking forming of steel angles and full penetrating of main welds |
| CN106049989A (en) * | 2016-07-21 | 2016-10-26 | 深圳市洪星宏电子科技有限公司 | Electronic lock mounting mechanism and mounting method thereof |
| CN207137560U (en) * | 2017-06-20 | 2018-03-27 | 江西省龙晨管业科技发展有限责任公司 | Hard polyethylene tubing produces special dust seperator |
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| CN208825305U (en) * | 2018-08-06 | 2019-05-07 | 郑州新农村蔬菜食品有限公司 | A kind of angle steel positioning device for perforating press |
| CN209549006U (en) * | 2019-01-25 | 2019-10-29 | 上海弗来应实业有限公司 | A kind of high temperature resistant filtration dust catcher |
| CN109847478A (en) * | 2019-03-22 | 2019-06-07 | 无锡红旗除尘设备有限公司 | A kind of cluster type modularization filter bay assembly can satisfy minimum discharge requirement |
| CN210388096U (en) * | 2019-07-03 | 2020-04-24 | 李丽英 | Welding set is assembled to stagnant water steel sheet |
| CN211435428U (en) * | 2019-12-25 | 2020-09-08 | 江苏丰尚智能科技有限公司 | Square pulse cloth tube dust remover box structure |
| CN213115105U (en) * | 2020-08-21 | 2021-05-04 | 山西华亿众成建材有限公司 | Concrete wall structure with built-in heat-insulating layer |
| CN214739900U (en) * | 2021-02-01 | 2021-11-16 | 中建八局西北建设有限公司 | Closed steel-wood combined stair template |
| CN215232918U (en) * | 2021-05-17 | 2021-12-21 | 邢台市天元星食品设备有限公司 | Welding fume purification device for movable arm type mechanical workshop |
| CN215310929U (en) * | 2021-07-08 | 2021-12-28 | 北京国能华瑞环保科技发展有限公司 | Dust remover cylinder filter bag convenient to dismouting |
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