CN112221274A - Ceramic filter tube device for industrial waste gas treatment - Google Patents
Ceramic filter tube device for industrial waste gas treatment Download PDFInfo
- Publication number
- CN112221274A CN112221274A CN202011149930.5A CN202011149930A CN112221274A CN 112221274 A CN112221274 A CN 112221274A CN 202011149930 A CN202011149930 A CN 202011149930A CN 112221274 A CN112221274 A CN 112221274A
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- Prior art keywords
- annular
- plate
- fixing plate
- ceramic filter
- waste gas
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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
-
- 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
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a ceramic filter tube device for industrial waste gas treatment, which comprises a plurality of branch tubes connected with each other, wherein a connecting device is arranged between every two adjacent branch tubes, the connecting device comprises an annular mounting plate and an annular fixing plate which are symmetrically and detachably mounted on the two adjacent branch tubes, the annular mounting plate and the annular fixing plate are mutually contacted, fixing rings are respectively connected onto the annular mounting plate and the annular fixing plate, the fixing rings are respectively detachably mounted on the branch tubes, an annular connecting plate is fixedly mounted on the outer side wall of one side, close to the annular fixing plate, of the annular mounting plate, the annular connecting plate is inserted into the annular fixing plate, and an annular connecting groove matched with the annular connecting plate is formed in the annular. The ceramic filter pipe comprises a plurality of branch pipes which are connected with each other, the length of the ceramic filter pipe can be freely combined according to the use requirement, the interior of each branch pipe can be conveniently cleaned due to the fact that the branch pipes are small in length, the design is reasonable, and the practical effect is good.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a ceramic filter pipe device for industrial waste gas treatment.
Background
With the rapid development of social economy and industrial expanded production, the problem of environmental pollution caused by the industrial waste gas is also becoming more serious, and the industrial waste gas is various pollutant-containing gas discharged into the air generated in the process of fuel combustion and production in factory areas of enterprises, and the gas comprises acidic, alkaline and organic gases and has great corrosivity and destructiveness to the surrounding environment.
At present, the ceramic filter pipe is basically required to be used in the industrial waste gas treatment process, the ceramic filter pipe has extremely excellent acid resistance, and is still stable to all acids except hydrofluoric acid under the high-temperature condition, but the existing ceramic filter pipe is of an integrated structure, and the length of the existing ceramic filter pipe cannot be freely combined according to the use requirement due to the fact that the existing ceramic filter pipe is long and fixed in length, the inside of the ceramic filter pipe is not convenient to clean, the practical effect is poor, and therefore improvement needs to be made on the existing ceramic filter pipe.
Disclosure of Invention
The invention aims to solve the problem that the ceramic filter pipe for treating industrial waste gas is unreasonable in design in the prior art, and provides a ceramic filter pipe device for treating industrial waste gas.
In order to achieve the purpose, the invention adopts the following technical scheme:
a ceramic filter tube device for industrial waste gas treatment comprises a plurality of branch tubes which are connected with each other, a connecting device is arranged between every two adjacent branch tubes, the connecting device comprises an annular mounting plate and an annular fixing plate which are symmetrically and detachably mounted on the two adjacent branch tubes, the annular mounting plate and the annular fixing plate are contacted with each other, the annular mounting plate and the annular fixing plate are both connected with fixing rings, the fixing rings are detachably mounted on the branch tubes, an annular connecting plate is fixedly mounted on the outer side wall of the annular mounting plate close to one side of the annular fixing plate and is inserted on the annular fixing plate, an annular connecting groove which is matched with the annular connecting plate is formed in the annular fixing plate, a sealing gasket which is matched with the annular connecting plate is fixedly mounted on the inner side wall of the annular connecting groove, two limiting blocks are symmetrically and movably, two spacing grooves mutually matched with the limiting block are symmetrically formed in the inner side wall of the annular connecting groove, two push rods mutually matched with the limiting block are symmetrically in threaded connection on the annular fixing plate, the push rods correspond to the limiting block in a one-to-one mode, one end of each push rod extends into the corresponding spacing groove, and a fixing device mutually matched with the annular connecting plate is arranged on the annular fixing plate.
Preferably, the fixed ring comprises a fixed half ring fixedly installed on the annular installation plate or the annular fixing plate, the bottom end of the fixed half ring is connected with a movable half ring, the fixed half ring and the movable half ring are tightly sleeved on the branch pipe, the two ends of the fixed half ring and the movable half ring are fixedly installed with connecting blocks, two adjacent connecting blocks are in mutual contact, two adjacent connecting blocks are inserted on the connecting blocks together and are provided with connecting screw rods, and the connecting screw rods are connected with connecting nuts through threads.
Preferably, the inner side walls of the fixed half ring and the movable half ring are fixedly provided with sealing gaskets, and the sealing gaskets are tightly attached to the branch pipes.
Preferably, the annular connecting plate is last the symmetry seted up two mounting grooves of mutually supporting with the stopper, two equal activity is inserted on the inside wall of mounting groove and is equipped with a plurality of movable rods, and the equal fixed mounting of one end of movable rod is on the stopper, every all around being equipped with the spring on the lateral wall of movable rod, and the both ends of spring fixed mounting respectively is on the lateral wall of stopper and the inside wall of mounting groove.
Preferably, the end, far away from the annular connecting plate, of the limiting block is an arc surface.
Preferably, two grooves matched with the push rods are symmetrically formed in the outer side wall of the annular fixing plate, and the two push rods are located in the two grooves respectively.
Preferably, the fixing device comprises two fastening screws symmetrically screwed on the annular fixing plate, and the two fastening screws penetrate through the outer side wall of one side of the annular fixing plate and are screwed on the annular connecting plate.
Preferably, two concave holes matched with the fastening screws are symmetrically formed in the annular fixing plate, the concave holes correspond to the fastening screws one by one, and the fastening screws are located in the corresponding concave holes.
Compared with the prior art, the invention has the following beneficial effects:
1. the ceramic filter pipe consists of a plurality of branch pipes which are connected with each other, the length of the ceramic filter pipe can be freely combined according to the use requirement, and the interior of each branch pipe can be conveniently cleaned due to the small length of each branch pipe, so that the ceramic filter pipe is reasonable in design and good in practical effect;
2. the structure is simple, the adjacent branch pipes can be conveniently and fixedly connected to one branch pipe or detached, the operation is convenient and quick, and the using effect is good;
3. be equipped with the fixing device who mutually supports with annular connecting plate on the annular fixed plate, not only promoted the joint strength of adjacent branch pipe, also further promoted the leakproofness that adjacent branch pipe connects to can prevent that waste gas from taking place to leak in ceramic filter tube.
Drawings
FIG. 1 is a front sectional view of a ceramic filter tube assembly for industrial waste gas treatment according to the present invention;
FIG. 2 is a schematic front view of a ceramic filter tube device for industrial waste gas treatment according to the present invention;
FIG. 3 is an enlarged view of a portion A of the construction of a ceramic filter tube assembly for industrial waste gas treatment according to the present invention;
FIG. 4 is an enlarged view of a portion B of the ceramic filter tube assembly for industrial waste gas treatment according to the present invention;
FIG. 5 is an enlarged view of a portion C of a ceramic filter tube assembly for industrial waste gas treatment according to the present invention.
In the figure: the device comprises a branch pipe 1, an annular mounting plate 2, an annular fixing plate 3, a fixed semi-ring 4, a movable semi-ring 5, a connecting block 6, a connecting screw rod 7, a connecting nut 8, a sealing gasket 9, an annular connecting plate 10, an annular connecting groove 11, a sealing gasket 12, a limiting block 13, a mounting groove 14, a movable rod 15, a spring 16, a limiting groove 17, a push rod 18, a groove 19, a fastening screw 20 and a concave hole 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 to 5, a ceramic filter tube device for industrial waste gas treatment, comprising a plurality of branch tubes 1 connected with each other, a connecting device is arranged between two adjacent branch tubes 1, the connecting device comprises an annular mounting plate 2 and an annular fixing plate 3 which are symmetrically and detachably mounted on the two adjacent branch tubes 1, the annular mounting plate 2 and the annular fixing plate 3 are in contact with each other, the annular mounting plate 2 and the annular fixing plate 3 are both connected with fixing rings, the fixing rings are detachably mounted on the branch tubes 1, the fixing rings comprise fixed half rings 4 fixedly mounted on the annular mounting plate 2 or the annular fixing plate 3, the bottom ends of the fixed half rings 4 are connected with movable half rings 5, the fixed half rings 4 and the movable half rings 5 are tightly sleeved on the branch tubes 1 together, connecting blocks 6 are fixedly mounted at both ends of the fixed half rings 4 and the movable half rings 5, and, all insert jointly on two adjacent connecting blocks 6 and be equipped with connecting screw 7, equal threaded connection has coupling nut 8 on two connecting screw 7, can be convenient with annular mounting panel 2 and annular fixed plate 3 fixed mounting to branch pipe 1 on or pull down from branch pipe 1.
All fixed mounting has sealed the pad 9 on the inside wall of fixed semi-ring 4 and activity semi-ring 5, and sealed pad 9 all pastes tightly on branch pipe 1, has promoted the leakproofness that fixed ring, annular mounting panel 2 and annular fixed plate 3 are connected with branch pipe 1.
An annular connecting plate 10 is fixedly arranged on the outer side wall of one side of the annular mounting plate 2 close to the annular fixing plate 3, the annular connecting plate 10 is inserted on the annular fixing plate 3, an annular connecting groove 11 matched with the annular connecting plate 10 is arranged on the annular fixing plate 3, a sealing washer 12 matched with the annular connecting plate 10 is fixedly arranged on the inner side wall of the annular connecting groove 11, two limiting blocks 13 are symmetrically and movably arranged on the annular connecting plate 10, two mounting grooves 14 matched with the limiting blocks 13 are symmetrically arranged on the annular connecting plate 10, a plurality of movable rods 15 are movably inserted on the inner side walls of the two mounting grooves 14, one end of each movable rod 15 is fixedly arranged on the limiting blocks 13, a spring 16 is wound on the outer side wall of each movable rod 15, and the two ends of each spring 16 are respectively and fixedly arranged on the outer side wall of the limiting, two stopper 13 all can freely move, and the one end that annular connecting plate 10 was kept away from to stopper 13 is the cambered surface, and stopper 13's cambered surface can contract to mounting groove 14 in by the extrusion after to be convenient for insert stopper 13 and annular connecting plate 10 in annular connecting groove 11.
Two limit grooves 17 matched with the limit blocks 13 are symmetrically arranged on the inner side wall of the annular connecting groove 11, two push rods 18 matched with the limit blocks 13 are symmetrically in threaded connection on the annular fixing plate 3, the push rods 18 correspond to the limit blocks 13 one by one, one end of each push rod 18 extends into the corresponding limit groove 17, the annular connecting plate 10 is inserted into the corresponding annular connecting groove 11 and the annular mounting plate 2 is attached to the corresponding annular fixing plate 3, the spring 16 pushes one end of each limit block 13 to move into the corresponding limit groove 17 due to the recovery of the elasticity, the limit blocks 13, the annular connecting plates 10 and the annular mounting plates 2 can be fixedly connected to the adjacent annular fixing plates 3, the push rods 18 are rotated to push the limit blocks 13 to the outer sides of the limit grooves 17, and the limit blocks 13, the annular connecting plates 10 and the annular mounting plates 2 can be conveniently detached from the annular fixing plates 3, the adjacent branch pipes 1 can be conveniently and fixedly connected together or the adjacent branch pipes 1 can be disassembled, so that the operation is convenient and rapid.
Two grooves 19 matched with the push rods 18 are symmetrically formed in the outer side wall of the annular fixing plate 3, the two push rods 18 are respectively located in the two grooves 19, and the push rods 18 can be prevented from protruding out of the annular fixing plate 3.
Be equipped with the fixing device who mutually supports with annular connection board 10 on annular fixed plate 3, fixing device includes two fastening screw 20 of symmetrical threaded connection on annular fixed plate 3, two fastening screw 20 all run through the lateral wall and the threaded connection of annular fixed plate 3 one side on annular connection board 10, not only promoted adjacent branch pipe 1's joint strength, also further promoted the leakproofness that adjacent branch pipe 1 is connected to can prevent that waste gas from taking place to leak in ceramic filter tube.
Two shrinkage pools 21 that mutually support with fastening screw 20 are seted up to the symmetry on annular fixed plate 3, shrinkage pool 21 and fastening screw 20 one-to-one, and fastening screw 20 all is located the shrinkage pool 21 that corresponds, can prevent that fastening screw 20 protrusion is in the outside of annular fixed plate 3.
In the invention, the annular mounting plate 2 and the annular fixing plate 3 are respectively connected to two adjacent branch pipes 1, the fixed half ring 4 is tightly sleeved on the branch pipes 1, the movable half ring 5 is connected at the bottom end of the fixed half ring 4, the fixed half ring 4 and the movable half ring 5 are together tightly sleeved on the branch pipes 1 by means of the connecting block 7, the connecting screw 7 and the connecting nut 8, the annular mounting plate 2 and the annular fixing plate 3 can be respectively fixed on the two adjacent branch pipes 1, the annular connecting plate 10 is inserted into the corresponding annular connecting groove 11 and the annular mounting plate 2 is attached to the corresponding annular fixing plate 3, the spring 16 pushes one end of the limiting block 13 to move into the corresponding limiting groove 17 due to the restoration of the self-elasticity, and the limiting block 13, the annular connecting plate 10 and the annular mounting plate 2 can be fixedly connected on the adjacent annular fixing, then the annular connecting plate 10 is fixed by using a fastening screw 20, so that two adjacent branch pipes 1 can be conveniently and fixedly connected together; the fastening screws 20 are rotated out of the annular connecting plate 10, then the push rods 18 are rotated, and the limit blocks 13 are pushed to the outer sides of the limit grooves 17, so that the limit blocks 13, the annular connecting plate 10 and the annular mounting plate 2 can be conveniently detached from the annular fixing plate 3, and the adjacent branch pipes 1 can be conveniently detached.
Further, unless otherwise specifically stated or limited, the above-described fixed connection is to be understood in a broad sense, and may be, for example, welded, glued, or integrally formed as is conventional in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides a ceramic filter tube device for industrial waste gas treatment, includes a plurality of branch pipes (1) of interconnect, its characterized in that: two adjacent branch pipes (1) are provided with a connecting device, the connecting device comprises an annular mounting plate (2) and an annular fixing plate (3) which are symmetrically disassembled and mounted on the two adjacent branch pipes (1), the annular mounting plate (2) and the annular fixing plate (3) are contacted with each other, the annular mounting plate (2) and the annular fixing plate (3) are connected with fixing rings, the fixing rings are disassembled and mounted on the branch pipes (1), the annular mounting plate (2) is fixedly mounted on the outer side wall close to one side of the annular fixing plate (3) and is provided with an annular connecting plate (10), the annular connecting plate (10) is inserted on the annular fixing plate (3), the annular fixing plate (3) is provided with an annular connecting groove (11) which is matched with the annular connecting plate (10), and the inner side wall of the annular connecting groove (11) is fixedly provided with a sealing gasket (12) which is matched with the annular connecting, symmetry movable mounting has two stopper (13) on annular connecting plate (10), two spacing groove (17) of mutually supporting with stopper (13) are seted up to the symmetry on the inside wall of annular connecting groove (11), symmetrical threaded connection has two push rod (18) of mutually supporting with stopper (13) on annular fixing plate (3), push rod (18) and stopper (13) one-to-one, and the one end of push rod (18) all extends to in corresponding spacing groove (17), be equipped with the fixing device who mutually supports with annular connecting plate (10) on annular fixing plate (3).
2. The ceramic filter tube assembly for industrial waste gas treatment according to claim 1, wherein: the fixed ring comprises a fixed semi-ring (4) fixedly installed on an annular installation plate (2) or an annular fixing plate (3), the bottom end of the fixed semi-ring (4) is connected with a movable semi-ring (5), the fixed semi-ring (4) and the movable semi-ring (5) are tightly sleeved on a branch pipe (1) together, connecting blocks (6) are fixedly installed at the two ends of the fixed semi-ring (4) and the movable semi-ring (5) respectively, two adjacent connecting blocks (6) are in mutual contact, two adjacent connecting screws (7) are inserted into the connecting blocks (6) respectively, and the connecting screws (7) are connected with connecting nuts (8) through threads.
3. The ceramic filter tube assembly for industrial waste gas treatment according to claim 2, wherein: and sealing gaskets (9) are fixedly mounted on the inner side walls of the fixed half ring (4) and the movable half ring (5), and the sealing gaskets (9) are tightly attached to the branch pipes (1).
4. The ceramic filter tube assembly for industrial waste gas treatment according to claim 1, wherein: annular connecting plate (10) are gone up the symmetry and are seted up two mounting grooves (14) of mutually supporting with stopper (13), two equal activity is inserted on the inside wall of mounting groove (14) and is equipped with a plurality of movable rods (15), and the equal fixed mounting of one end of movable rod (15) is on stopper (13), every all around being equipped with spring (16) on the lateral wall of movable rod (15), and the both ends difference fixed mounting of spring (16) is on the lateral wall of stopper (13) and the inside wall of mounting groove (14).
5. The ceramic filter tube assembly for industrial waste gas treatment according to claim 1, wherein: and one end of the limiting block (13) far away from the annular connecting plate (10) is an arc surface.
6. The ceramic filter tube assembly for industrial waste gas treatment according to claim 1, wherein: two grooves (19) matched with the push rods (18) are symmetrically formed in the outer side wall of the annular fixing plate (3), and the two push rods (18) are located in the two grooves (19) respectively.
7. The ceramic filter tube assembly for industrial waste gas treatment according to claim 1, wherein: the fixing device comprises two fastening screws (20) symmetrically connected to the annular fixing plate (3) in a threaded mode, and the two fastening screws (20) penetrate through the outer side wall of one side of the annular fixing plate (3) and are connected to the annular connecting plate (10) in a threaded mode.
8. The ceramic filter tube assembly for industrial waste gas treatment according to claim 1, wherein: two shrinkage pools (21) of mutually supporting with fastening screw (20) are seted up to the symmetry on annular fixed plate (3), shrinkage pool (21) and fastening screw (20) one-to-one, and fastening screw (20) all are located corresponding shrinkage pool (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011149930.5A CN112221274A (en) | 2020-10-24 | 2020-10-24 | Ceramic filter tube device for industrial waste gas treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011149930.5A CN112221274A (en) | 2020-10-24 | 2020-10-24 | Ceramic filter tube device for industrial waste gas treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112221274A true CN112221274A (en) | 2021-01-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011149930.5A Withdrawn CN112221274A (en) | 2020-10-24 | 2020-10-24 | Ceramic filter tube device for industrial waste gas treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112221274A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0939270A1 (en) * | 1998-02-27 | 1999-09-01 | L B E Feuerungstechnik GmbH | Jet pipe device |
| CN202682967U (en) * | 2012-04-12 | 2013-01-23 | 贵阳经济技术开发区永兴机械有限公司 | Multi-section ammonia and air glass fiber filter pipe |
| CN207762398U (en) * | 2018-01-11 | 2018-08-24 | 李翎 | A kind of attachment device for water supply and sewerage pipeline |
| WO2020008428A1 (en) * | 2018-07-06 | 2020-01-09 | Ashirvad Pipes Pvt. Ltd | Pipe and coupler joint with groove and multi lip seal |
| CN210069174U (en) * | 2019-05-15 | 2020-02-14 | 福州市晋安区鑫凯兴网络科技有限公司 | Folding pipe for ship pipeline |
| CN210770875U (en) * | 2019-08-30 | 2020-06-16 | 白冰洋 | Municipal administration pipeline prevents subsiding structure |
| CN210860167U (en) * | 2019-08-06 | 2020-06-26 | 朱中利 | Fire-fighting water pump connector device |
| US20200232586A1 (en) * | 2017-07-11 | 2020-07-23 | Lutec Gmbh Verwaltungs- Und Beteiligungsgesellschaft | Pipe, in Particular Plastic Pipe for Wastewater Lines |
| CN211737185U (en) * | 2020-03-12 | 2020-10-23 | 赵忻 | Local ventilation device in pit in colliery |
-
2020
- 2020-10-24 CN CN202011149930.5A patent/CN112221274A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0939270A1 (en) * | 1998-02-27 | 1999-09-01 | L B E Feuerungstechnik GmbH | Jet pipe device |
| CN202682967U (en) * | 2012-04-12 | 2013-01-23 | 贵阳经济技术开发区永兴机械有限公司 | Multi-section ammonia and air glass fiber filter pipe |
| US20200232586A1 (en) * | 2017-07-11 | 2020-07-23 | Lutec Gmbh Verwaltungs- Und Beteiligungsgesellschaft | Pipe, in Particular Plastic Pipe for Wastewater Lines |
| CN207762398U (en) * | 2018-01-11 | 2018-08-24 | 李翎 | A kind of attachment device for water supply and sewerage pipeline |
| WO2020008428A1 (en) * | 2018-07-06 | 2020-01-09 | Ashirvad Pipes Pvt. Ltd | Pipe and coupler joint with groove and multi lip seal |
| CN210069174U (en) * | 2019-05-15 | 2020-02-14 | 福州市晋安区鑫凯兴网络科技有限公司 | Folding pipe for ship pipeline |
| CN210860167U (en) * | 2019-08-06 | 2020-06-26 | 朱中利 | Fire-fighting water pump connector device |
| CN210770875U (en) * | 2019-08-30 | 2020-06-16 | 白冰洋 | Municipal administration pipeline prevents subsiding structure |
| CN211737185U (en) * | 2020-03-12 | 2020-10-23 | 赵忻 | Local ventilation device in pit in colliery |
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Application publication date: 20210115 |