CN111632762B - Use method of electrostatic dust removal device for construction site - Google Patents
Use method of electrostatic dust removal device for construction site Download PDFInfo
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- CN111632762B CN111632762B CN202010518825.8A CN202010518825A CN111632762B CN 111632762 B CN111632762 B CN 111632762B CN 202010518825 A CN202010518825 A CN 202010518825A CN 111632762 B CN111632762 B CN 111632762B
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- 239000000428 dust Substances 0.000 title claims abstract description 140
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 230000003068 static effect Effects 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims abstract description 4
- 229920000742 Cotton Polymers 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 239000012717 electrostatic precipitator Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/04—Plant or installations having external electricity supply dry type
- B03C3/06—Plant or installations having external electricity supply dry type characterised by presence of stationary tube electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/28—Plant or installations without electricity supply, e.g. using electrets
- B03C3/30—Plant or installations without electricity supply, e.g. using electrets in which electrostatic charge is generated by passage of the gases, i.e. tribo-electricity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/41—Ionising-electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
- B03C3/49—Collecting-electrodes tubular
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/78—Cleaning the electrodes by washing
Landscapes
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a using method of an electrostatic dust removal device for a construction site, which comprises the following steps: s1, injecting cleaning water, and injecting a certain volume of clear water into the water storage position of the dust removal device; s2, installing a dust removal device, and fixedly hanging the dust removal device at a high position of a construction site; s3, removing dust and dust, taking down the dust removal device suspended for a period of time from a high position, and pouring out the dust and dust in the air filtered and collected in the dust removal device; and S4, cleaning the dust removal part of the dust removal device. By arranging the dust removal pipe, the spring and the driving mechanism, the dust removal pipe can generate static electricity to adsorb dust in air by taking wind power as driving force, and meanwhile, water can be pumped to clean the surface of the dust removal pipe, so that the dust removal pipe is ensured to have good dust collection capacity all the time, and the automatic dust removal function of a building site is realized.
Description
Technical Field
The invention relates to the field of building equipment, in particular to a using method of an electrostatic dust removal device for a building site.
Background
Due to the characteristics of the construction industry, a lot of impurities such as dust and dust are diffused in the air near the construction site, which is the most common problem of the construction industry, the dust and dust near the construction site not only can seriously affect the bodies of people around, various respiratory diseases can be caused after the dust and dust are sucked, and once the dust and dust enter the construction machinery, the service life of the machine can be shortened, so that the safety is considered, and in addition, the high requirement of the current country on environmental protection, a large amount of dust removing equipment is required to be used for purifying the air and removing the dust and dust on the construction site.
However, the traditional dust remover adopts a filter cartridge dust remover, the filter cartridge is easy to block after the dust remover is used for a period of time, so that the dust removing effect is obviously reduced, and the dust remover has larger volume, occupies larger construction space and is not suitable for being used in construction sites; meanwhile, the emerging electrostatic dust collector is too complex in structure, needs to be maintained frequently, is high in maintenance cost in the using process, needs to consume a large amount of electric energy, and is not environment-friendly.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a using method of an electrostatic dust removal device for a construction site.
In order to achieve the purpose, the invention adopts the following technical scheme:
the use method of the electrostatic dust removal device for the construction site comprises the following steps:
s1, injecting cleaning water, injecting a certain volume of clear water into the water storage position of the dust removal device, and checking whether the air tightness of each position of the water storage position is good or not;
s2, installing a dust removal device, and fixedly hanging the dust removal device at a high position of a construction site to ensure that a large airflow passes through the dust removal device;
s3, removing dust and dust, taking down the dust removal device suspended for a period of time from a high position, and pouring out the dust and dust in the air filtered and collected in the dust removal device;
s4, cleaning the dust removal device, and cleaning the dust removal part of the dust removal device to ensure that the dust removal device still has a good dust removal function when used next time;
the dust removal device used in the dust removal process of the building site comprises a shell, wherein a through groove is formed in the side wall of the shell, a plurality of dust removal pipes made of staggered glass are vertically arranged in the through groove, a spring with wear-resistant cotton fibers covered on the surface is filled in the dust removal pipe, a sliding cavity and a water storage cavity are respectively formed in the upper end and the lower end of the side wall of the shell, a pressure storage cavity is formed in the upper end wall body of the shell, a magnetic sliding plug is connected in the sliding cavity in a sealing and sliding manner, the lower end of the sliding cavity is communicated with a water guide pipe with the water inlet end submerged below the liquid level of the water storage cavity, a one-way valve is arranged in the water guide pipe, the lower end of the sliding cavity is communicated with the pressure storage cavity through a water outlet cavity, a one-way valve is arranged in the water outlet cavity, the top of the through groove is provided with a spray opening communicated with the pressure storage cavity and facing the dust removal pipe close to the pressure storage cavity, and a pressure valve is arranged in the spray opening, the upper end part of the sliding cavity is provided with a driving mechanism for driving the magnetic sliding plug to reciprocate up and down, the lower end of the shell is fixedly provided with an ash bucket, the inner bottom of the through groove is provided with a drain hole communicated with the ash bucket, and the side wall of the shell is provided with a hook.
Preferably, actuating mechanism includes the permanent magnetism piece of connection in sliding chamber upper end portion through the pivot rotation, the pivot extends to the outside and fixedly connected with wind cup of casing, the outer lane of permanent magnetism piece is provided with many circles and is the closed condition and with the spiral coil of the both ends coupling of spring.
The invention has the following beneficial effects:
1. by arranging the driving mechanism, the amplifying circuit, the dust removing pipe and the spring, when air flow containing dust blows from the dust removing device, the wind cup can be driven by wind power to rotate, the wind cup drives the permanent magnet to rotate, so that a constantly changing magnetic field is generated, the spiral coil cuts a magnetic induction line in a phase-changing manner, induced current is generated on the spiral coil, the induced current is amplified by the amplifying circuit and then is electrified by the spring, and the spring is electrified to generate a shaking phenomenon, so that wear-resistant cotton threads on the surface of the spring continuously rub against the inner wall of the dust removing pipe, more static electricity is generated on the dust removing pipe, and the dust in the air flow is adsorbed on the surface of the dust removing pipe, so that the air passing through the dust removing device can be effectively purified and dedusted, and the automatic dust removing function of a building site is realized;
2. by arranging the driving mechanism, the magnetic sliding plug and the water storage cavity, when the permanent magnet continuously rotates along with the wind cup, different magnetic poles of the permanent magnet alternately face the same magnetic pole of the magnetic sliding plug, so that the magnetic sliding plug is pushed to vertically reciprocate under the action of magnetic force, a water pump in the water storage cavity is sprayed out from a spraying opening, a dust removal pipe is sprayed and cleaned, dust adhered to the dust removal pipe is removed, and the dust removal pipe can be ensured to have good dust adsorption capacity all the time;
3. through setting up pressure storage chamber and pressure valve, can go into the water pump and store in the pressure storage chamber, reach automatic release after certain pressure to the messenger sprays washing water on the dust removal pipe and has certain jet dynamics, thereby can play better clean effect.
Drawings
FIG. 1 is a method for using an electrostatic precipitator for a construction site according to the present invention;
FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1;
fig. 3 is an enlarged view of a structure of fig. 2.
In the figure: the device comprises a shell 1, a through groove 2, a sliding cavity 3, a water storage cavity 4, a pressure storage cavity 5, a magnetic sliding plug 6, a wind cup 7, a permanent magnet 8, a spiral coil 9, a water guide pipe 10, a water outlet cavity 11, a spray opening 12, a hook 13, a dust removal pipe 14, an ash hopper 15, a water discharge hole 16, a spring 17 and a pressure valve 18.
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 3, a method for using an electrostatic precipitator for a construction site includes the steps of:
s1, injecting cleaning water, injecting a certain volume of clear water into the water storage position of the dust removal device, and checking whether the air tightness of each position of the water storage position is good or not;
s2, installing a dust removal device, and fixedly hanging the dust removal device at a high position of a construction site to ensure that a large airflow passes through the dust removal device;
s3, removing dust and dust, taking down the dust removal device suspended for a period of time from a high position, and pouring out the dust and dust in the air filtered and collected in the dust removal device;
s4, cleaning the dust removal device, and cleaning the dust removal part of the dust removal device to ensure that the dust removal device still has a good dust removal function when used next time;
above-mentioned dust collector that uses among building site dust removal process includes casing 1, logical groove 2 has been seted up on casing 1's the lateral wall, lead to the interior dust removal pipe 14 that vertically installs many crisscross glass and make of inslot 2, the intraductal spring 17 that is filled with the surface covering and has wear-resisting cotton silk of dust removal pipe 14, the wear-resisting cotton silk on spring 17 surface and the surface contact of dust removal pipe 14, when spring 17 shakes, wear-resisting cotton silk takes place the friction with the glass face of dust removal pipe 14, will produce static on the dust removal pipe 14.
The upper end and the lower end of the side wall of the shell 1 are respectively provided with a sliding cavity 3 and a water storage cavity 4, the upper end wall body of the shell 1 is internally provided with a pressure storage cavity 5, the sliding cavity 3 is internally connected with a magnetic sliding plug 6 in a sealing and sliding way, the lower end part of the sliding cavity 3 is communicated with a water guide pipe 10 with the water inlet end submerged below the liquid level of the water storage cavity 4, the water guide pipe 10 is internally provided with a one-way valve which only allows water to flow from the water storage cavity 4 to the sliding cavity 3, the lower end part of the sliding cavity 3 is also communicated with the pressure storage cavity 5 through a water outlet cavity 11, the water outlet cavity 11 is internally provided with a one-way valve which only allows water to flow from the sliding cavity 3 to the pressure storage cavity 5, the inner top of the through groove 2 is provided with a spraying opening 12 which is communicated with the pressure storage cavity 5 and has an opening facing to a dust removal pipe 14 close to the pressure storage cavity, the spraying opening 12 is internally provided with a pressure valve 18, and further, the pressure valve 18 is a time-delay self-closing valve, namely when the pressure at the pressure valve 18 reaches the threshold value, the pressure valve 18 is automatically opened, after a period of time, the pressure valve 18 will close automatically again, which is prior art and will not be described in detail herein.
The upper end part of the sliding cavity 3 is provided with a driving mechanism for driving the magnetic sliding plug 6 to reciprocate up and down, the lower end of the shell 1 is fixedly provided with an ash bucket 15, the inner bottom part of the through groove 2 is provided with a drain hole 16 communicated with the ash bucket 15, and the side wall of the shell 1 is provided with a hook 13.
The driving mechanism comprises a permanent magnet 8 which is rotatably connected to the upper end part of the sliding cavity 3 through a rotating shaft, the rotating shaft extends to the outside of the shell 1 and is fixedly connected with a wind cup 7, and the outer ring of the permanent magnet 8 is provided with a plurality of coils 9 which are in a closed state and are coupled with the two ends of a spring 17.
It should be noted that, different magnetic poles of the permanent magnet 8 are opposite to those of the magnetic sliding plug 6 in an initial state, and when the wind cup 7 drives the permanent magnet 8 to rotate, the permanent magnet 8 and the magnetic sliding plug 6 are alternately opposite in the same or different poles, so that an attractive force and a repulsive force are alternately generated between the permanent magnet 8 and the magnetic sliding plug 6, and therefore, under the action of an alternating force, the magnetic sliding plug 6 can slide back and forth in the vertical direction.
In order to ensure that the induced current generated by the helical coil 9 due to cutting the magnetic induction lines of the permanent magnet 8 is large enough to continuously shake the spring 17 during the rotation of the permanent magnet 8 in actual use, an amplifying circuit coupled to the helical coil 9 and the spring 17 may be installed on the housing 1, and the amplifying circuit may amplify the induced current on the helical coil 9, so that the spring 17 may continuously shake.
In the invention, when air flow containing dust and dust blows from the dust removal device, the wind cup 7 can be driven by wind power to rotate, the wind cup 7 drives the permanent magnet block 8 to rotate, so that a constantly changing magnetic field is generated, the spiral coil 9 cuts a magnetic induction line in a phase-changing manner, an induced current is generated on the spiral coil 9, the induced current is amplified by the amplifying circuit and then is electrified by the spring 17, and the spring 17 is electrified to generate a shaking phenomenon, so that wear-resistant cotton threads on the surface of the spring 17 continuously rub against the inner wall of the dust removal pipe 14, more static electricity is carried on the dust removal pipe 14, larger electrostatic force is generated, and the dust and dust in the air flow are adsorbed on the surface of the dust removal pipe 14, so that the air passing through the dust removal device can be effectively purified and dedusted, and the automatic dust removal function of a building site is realized.
When the permanent magnet 8 continuously rotates along with the wind cup 7, different magnetic poles of the permanent magnet 8 alternately face the same magnetic pole of the magnetic sliding plug 6, so that the magnetic sliding plug 6 is pushed to vertically reciprocate under the action of magnetic force, a water pump in the water storage cavity 4 is stored in the pressure storage cavity 5, when water in the pressure storage cavity 5 reaches a certain volume, the pressure at the pressure valve 18 reaches a threshold value, the pressure valve 18 is automatically opened, cleaning water is sprayed out from the spraying port 12, the dust removal pipe 14 is sprayed and cleaned, dust adhered to the dust removal pipe 14 is removed, and the dust removal pipe 14 can be guaranteed to have good dust and dust adsorption capacity all the time.
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 (2)
1. The use method of the electrostatic dust removal device for the construction site is characterized by comprising the following steps:
s1, injecting cleaning water, injecting a certain volume of clear water into the water storage position of the dust removal device, and checking whether the air tightness of each position of the water storage position is good or not;
s2, installing a dust removal device, and fixedly hanging the dust removal device at a high position of a construction site to ensure that a large airflow passes through the dust removal device;
s3, removing dust and dust, taking down the dust removal device suspended for a period of time from a high position, and pouring out the dust and dust in the air filtered and collected in the dust removal device;
s4, cleaning the dust removal device, and cleaning the dust removal part of the dust removal device to ensure that the dust removal device still has a good dust removal function when used next time;
the dust removal device used in the dust removal process of the building site comprises a shell (1), wherein a through groove (2) is formed in the side wall of the shell (1), a plurality of staggered dust removal pipes (14) made of glass are vertically arranged in the through groove (2), a spring (17) with wear-resistant cotton wires covered on the surface is filled in each dust removal pipe (14), the wear-resistant cotton wires on the surface of the spring (17) are in contact with the surface of each dust removal pipe (14), when the spring (17) shakes, the wear-resistant cotton wires rub against the glass surface of each dust removal pipe (14), and static electricity is generated on each dust removal pipe (14);
the device is characterized in that a sliding cavity (3) and a water storage cavity (4) are respectively arranged at the upper end and the lower end in the side wall of the shell (1), a pressure storage cavity (5) is formed in the upper end wall body of the shell (1), a magnetic sliding plug (6) is connected in the sliding cavity (3) in a sealing and sliding manner, the lower end of the sliding cavity (3) is communicated with a water guide pipe (10) with the water inlet end submerged below the liquid level of the water storage cavity (4), a one-way valve is arranged in the water guide pipe (10), the lower end of the sliding cavity (3) is communicated with the pressure storage cavity (4) through a water outlet cavity (11), the water outlet cavity (11) is internally provided with the one-way valve, the inner top of the through groove (2) is provided with a spraying opening (12) communicated with the pressure storage cavity (5) and provided with a dust removal pipe (14) close to the opening, a pressure valve (18) is arranged in the spraying opening (12), and a driving mechanism for driving the magnetic sliding plug (6) to move up and down is arranged at the upper end of the sliding cavity (3), the lower end of the shell (1) is fixedly provided with an ash bucket (15), the inner bottom of the through groove (2) is provided with a drain hole (16) communicated with the ash bucket (15), and the side wall of the shell (1) is provided with a hook (13).
2. The use method of the electrostatic precipitator for the construction site according to claim 1, wherein the driving mechanism comprises a permanent magnet (8) rotatably connected to the upper end of the sliding chamber (3) through a rotating shaft, the rotating shaft extends to the outside of the housing (1) and is fixedly connected with a wind cup (7), and the outer ring of the permanent magnet (8) is provided with a plurality of helical coils (9) which are in a closed state and are coupled with two ends of a spring (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010518825.8A CN111632762B (en) | 2020-06-09 | 2020-06-09 | Use method of electrostatic dust removal device for construction site |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010518825.8A CN111632762B (en) | 2020-06-09 | 2020-06-09 | Use method of electrostatic dust removal device for construction site |
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| CN111632762A CN111632762A (en) | 2020-09-08 |
| CN111632762B true CN111632762B (en) | 2022-04-22 |
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| CN112927634A (en) * | 2021-01-14 | 2021-06-08 | 宁波伟捷信息科技有限公司 | Sponge city is with wind energy electricity generation bill-board |
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| CN110670502A (en) * | 2019-10-21 | 2020-01-10 | 刘雨敬 | Sponge city town road indicating equipment |
| CN110835893A (en) * | 2019-11-28 | 2020-02-25 | 俞芳芳 | From dust type town road rail guard |
| CN110845132A (en) * | 2019-12-09 | 2020-02-28 | 舒华 | Efficient internal cutting equipment for glass tube |
| CN110924334A (en) * | 2019-12-12 | 2020-03-27 | 张敦友 | River is induction type dust removal rail guard for corridor |
| CN111036403A (en) * | 2019-12-12 | 2020-04-21 | 程贞祥 | Warning sign with dust absorption function |
| CN111011042A (en) * | 2019-12-27 | 2020-04-17 | 蔡路 | Windproof flowerpot |
| CN111167248A (en) * | 2020-01-14 | 2020-05-19 | 刘新建 | Green's industrial waste gas treatment equipment |
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| CN111632762A (en) | 2020-09-08 |
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Effective date of registration: 20220402 Address after: 271600 Yiyang Development Zone, Feicheng City, Tai'an City, Shandong Province Applicant after: Shandong Yiteng Construction Group Co.,Ltd. Address before: Room 403, No. 27, Lane 50, Xincun Road, Putuo District, Shanghai 200333 Applicant before: Mao Jiahao |
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