CN108215232A - A kind of anti-clogging processing method of pump valve pipeline - Google Patents
A kind of anti-clogging processing method of pump valve pipeline Download PDFInfo
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- CN108215232A CN108215232A CN201711301655.2A CN201711301655A CN108215232A CN 108215232 A CN108215232 A CN 108215232A CN 201711301655 A CN201711301655 A CN 201711301655A CN 108215232 A CN108215232 A CN 108215232A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
- B29C67/242—Moulding mineral aggregates bonded with resin, e.g. resin concrete
- B29C67/243—Moulding mineral aggregates bonded with resin, e.g. resin concrete for making articles of definite length
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2103/00—Use of resin-bonded materials as moulding material
- B29K2103/04—Inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
- C04B2235/424—Carbon black
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
Abstract
The present invention provides a kind of anti-clogging processing method of pump valve pipeline, is as follows：Inner wall Mold Making, the making of anti-clogging layer and anti-clogging layer and the inner wall for the gun barrel that discharges mutually are molded；The present invention can directly be handled for existing pump valve pipeline, its inner wall is made to have outstanding anti-clogging effect, avoids replacing, reduces use cost；Ensure that material will not be remained in pump valve pipeline simultaneously, prevent from causing the waste of material.
Description
Technical field
The invention belongs to pump valve fields, and in particular to a kind of anti-clogging processing method of pump valve pipeline.
Background technology
Pump valve pipeline is widely used in the productions such as chemical industry, food and drug, with to production efficiency and quality
Requirement it is higher and higher, pump valve pipeline is in transport, since internal pressure is insufficient or since pump valve pipeline is longer, leads to inside
Logistics cannot flow completely out, to a certain extent caused by raw material waste；And when internal material is more sticky, pump
Material has extremely been easily adhered on the inner wall of valve pipeline.
Therefore, it is people in the art to develop a kind of anti-clogging processing method for pump valve pipeline in view of the above problems
Member institute urgent need to solve the problem.
Invention content
To solve the above problems, the invention discloses a kind of anti-clogging processing methods of pump valve pipeline.
In order to achieve the above object, the present invention provides following technical solution：
A kind of anti-clogging processing method of pump valve pipeline, is as follows：
（1）Inner wall Mold Making：
According to the size of pump valve pipeline and the thickness of reserved anti-clogging layer make in wall mould in case with；
（2）The making of anti-clogging layer：
By anti-clogging layer material according to weight proportion carry out dispensing, pulverize, add after sintering aid uniformly mixed, isostatic pressed into
Type, and it is placed in sinter molding in nonoxidizing atmosphere；It is sieved, obtained according to required size specification after being pulverized again after sinter molding
Anti-clogging layer powder is with spare；PET resin is added into smelting equipment, heating is molten into glue；By the anti-clogging layer powder of acquisition
End is added in gelatinous PET resin, is stirred evenly, is obtained the anti-clogging layer being in a liquid state；
（3）Anti-clogging layer and the inner wall for the gun barrel that discharges mutually are molded；
By step（2）The anti-clogging layer injection cast insulation crucible being in a liquid state is obtained, to mould after mold is preheated to 112-135 DEG C
Have cavity stenciling coating, then mold；It will be cast in the anti-clogging layer injection mold being in a liquid state in heat preservation crucible according to anisobaric
Method carry out a liter liquid, fill type, pressurize, release；
Technological parameter is set first：Bleed pressure：0.85-1.1Mpa, simultaneous pressure：0.75-0.8Mpa, liquid speed degree is risen：55-
62mm/s, filling velocity：50-62mm/s, pumping rate：90-98mm/s；It is passed through simultaneously into mold cavity and heat preservation crucible
Compressed air, adjusting liter hydraulic coupling is 0.1-0.15Mpa, mold filling pressure 0.1-0.15Mpa, carries out filling type, fill after the completion of type
Pumping rate according to setting continues to be pressurized；When the pressure difference value of lower work tank reaches 0.06Mpa, pressurize, pressurize are carried out
Time is set as 10-15min；The anti-clogging layer being in a liquid state steadily is injected in mold after the completion of pressurize, and the work in pressure not etc.
Anti-clogging layer inner wall is cured as under；
Pump valve pipeline is taken out in last release.
Preferably, step（3）In be in a liquid state anti-clogging layer injection cast insulation crucible in before also need to add in it is hydrophobic
Property fiber dust simultaneously stirs；The addition of hydrophobic fibre powder is the 5-12% of anti-clogging layer quality.
Preferably, step（2）The constituent of middle anti-clogging layer material and each ingredient percent are respectively：Nitrogen
SiClx：66-82%, crystalline flake graphite：10-20%, Hydrophobic plant blade：8-15%；The weight of sintering aid is anti-clogging layer weight
15-20%.
Preferably, step（2）Middle sintering aid is in zirconium oxide, aluminium oxide, silica, calcium oxide and magnesia
At least arbitrary two kinds of combination.
Preferably, hydrophobic fibre powder is polyester fiber powder.
Preferably, Hydrophobic plant blade is Rice Leaf.
Compared with prior art, the present invention can directly be handled for existing pump valve pipeline, there is its inner wall
Outstanding anti-clogging effect, avoids replacing, reduces use cost；Ensure that material will not be remained in pump valve pipeline simultaneously, prevent
Major structure is into the waste of material.
Specific embodiment
Technical solution provided by the invention is described in detail below with reference to specific embodiment, it should be understood that following specific
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.
Embodiment 1：
The present invention provides a kind of anti-clogging processing methods of pump valve pipeline, are as follows：
（1）Inner wall Mold Making：
According to the size of pump valve pipeline and the thickness of reserved anti-clogging layer make in wall mould in case with；
（2）The making of anti-clogging layer：
By anti-clogging layer material according to weight proportion carry out dispensing, pulverize, add after sintering aid uniformly mixed, isostatic pressed into
Type, and it is placed in sinter molding in nonoxidizing atmosphere；It is sieved, obtained according to required size specification after being pulverized again after sinter molding
Anti-clogging layer powder is with spare；PET resin is added into smelting equipment, heating is molten into glue；By the anti-clogging layer powder of acquisition
End is added in gelatinous PET resin, is stirred evenly, is obtained the anti-clogging layer being in a liquid state；Wherein silicon nitride：66%th, scale stone
Ink：20%th, Hydrophobic plant blade：14%；The weight of sintering aid is the 15% of anti-clogging layer weight；Sintering aid for zirconium oxide,
The combination of aluminium oxide, silica；
（3）Anti-clogging layer and the inner wall for the gun barrel that discharges mutually are molded；
To step（2）It obtains and hydrophobic fibre powder is added in the anti-clogging layer being in a liquid state and is stirred, inject cast insulation crucible,
To mold cavity stenciling coating after mold is preheated to 112 DEG C, then mold；The anti-clogging layer note being in a liquid state in crucible will be kept the temperature
Enter in mold and carry out a liter liquid according to the method that anisobaric is cast, fill type, pressurize, release；The wherein addition of hydrophobic fibre powder
Measure 5% for anti-clogging layer quality；
Technological parameter is set first：Bleed pressure：0.85Mpa, simultaneous pressure：0.75Mpa, liquid speed degree is risen：55mm/s, type speed is filled
Degree：50mm/s, pumping rate：90mm/s；It is passed through compressed air simultaneously into mold cavity and heat preservation crucible, adjusts and rises hydraulic pressure
Power is 0.1Mpa, mold filling pressure 0.1Mpa, carries out filling type, fills type and continues to be pressurized according to the pumping rate of setting after the completion；When
When the pressure difference value of lower work tank reaches 0.06Mpa, pressurize is carried out, the dwell time is set as 10min；To be in liquid after the completion of pressurize
The anti-clogging layer of state is steadily injected in mold, and pressure not etc. under the action of be cured as anti-clogging layer inner wall；
Pump valve pipeline is taken out in last release.
More than hydrophobic fibre powder is polyester fiber powder, and Hydrophobic plant blade is Rice Leaf.
Embodiment 2：
The present invention provides a kind of anti-clogging processing methods of pump valve pipeline, are as follows：
（1）Inner wall Mold Making：
According to the size of pump valve pipeline and the thickness of reserved anti-clogging layer make in wall mould in case with；
（2）The making of anti-clogging layer：
By anti-clogging layer material according to weight proportion carry out dispensing, pulverize, add after sintering aid uniformly mixed, isostatic pressed into
Type, and it is placed in sinter molding in nonoxidizing atmosphere；It is sieved, obtained according to required size specification after being pulverized again after sinter molding
Anti-clogging layer powder is with spare；PET resin is added into smelting equipment, heating is molten into glue；By the anti-clogging layer powder of acquisition
End is added in gelatinous PET resin, is stirred evenly, is obtained the anti-clogging layer being in a liquid state；Wherein silicon nitride：82%th, scale stone
Ink：10%th, Hydrophobic plant blade：8%；The weight of sintering aid is the 20% of anti-clogging layer weight；Sintering aid for silica,
The combination of calcium oxide and magnesia；
（3）Anti-clogging layer and the inner wall for the gun barrel that discharges mutually are molded；
To step（2）It obtains and hydrophobic fibre powder is added in the anti-clogging layer being in a liquid state and is stirred, inject cast insulation crucible,
To mold cavity stenciling coating after mold is preheated to 135 DEG C, then mold；The anti-clogging layer note being in a liquid state in crucible will be kept the temperature
Enter in mold and carry out a liter liquid according to the method that anisobaric is cast, fill type, pressurize, release；The wherein addition of hydrophobic fibre powder
Measure the 5-12% for anti-clogging layer quality；
Technological parameter is set first：Bleed pressure：1.1Mpa, simultaneous pressure：0.8Mpa, liquid speed degree is risen：62mm/s, type speed is filled
Degree：62mm/s, pumping rate：98mm/s；It is passed through compressed air simultaneously into mold cavity and heat preservation crucible, adjusts and rises hydraulic pressure
Power is 0.15Mpa, mold filling pressure 0.15Mpa, carries out filling type, fills type and continues to be pressurized according to the pumping rate of setting after the completion；
When the pressure difference value of lower work tank reaches 0.06Mpa, pressurize is carried out, the dwell time is set as 15min；To be in after the completion of pressurize
The anti-clogging layer of liquid is steadily injected in mold, and pressure not etc. under the action of be cured as anti-clogging layer inner wall；
Pump valve pipeline is taken out in last release.
More than hydrophobic fibre powder is polyester fiber powder, and Hydrophobic plant blade is Rice Leaf.
Embodiment 3：
The present invention provides a kind of anti-clogging processing methods of pump valve pipeline, are as follows：
（1）Inner wall Mold Making：
According to the size of pump valve pipeline and the thickness of reserved anti-clogging layer make in wall mould in case with；
（2）The making of anti-clogging layer：
By anti-clogging layer material according to weight proportion carry out dispensing, pulverize, add after sintering aid uniformly mixed, isostatic pressed into
Type, and it is placed in sinter molding in nonoxidizing atmosphere；It is sieved, obtained according to required size specification after being pulverized again after sinter molding
Anti-clogging layer powder is with spare；PET resin is added into smelting equipment, heating is molten into glue；By the anti-clogging layer powder of acquisition
End is added in gelatinous PET resin, is stirred evenly, is obtained the anti-clogging layer being in a liquid state；Wherein silicon nitride：72%th, scale stone
Ink：16%th, Hydrophobic plant blade：12%；The weight of sintering aid is the 17% of anti-clogging layer weight；Sintering aid for zirconium oxide,
Combination in aluminium oxide, silica and magnesia；
（3）Anti-clogging layer and the inner wall for the gun barrel that discharges mutually are molded；
To step（2）It obtains and hydrophobic fibre powder is added in the anti-clogging layer being in a liquid state and is stirred, inject cast insulation crucible,
To mold cavity stenciling coating after mold is preheated to 130 DEG C, then mold；The anti-clogging layer note being in a liquid state in crucible will be kept the temperature
Enter in mold and carry out a liter liquid according to the method that anisobaric is cast, fill type, pressurize, release；The wherein addition of hydrophobic fibre powder
Measure 10% for anti-clogging layer quality；
Technological parameter is set first：Bleed pressure：1Mpa, simultaneous pressure：0.8Mpa, liquid speed degree is risen：55mm/s, filling velocity：
50mm/s, pumping rate：90mm/s；It is passed through compressed air simultaneously into mold cavity and heat preservation crucible, adjusts and rises hydraulic coupling
It for 0.15Mpa, mold filling pressure 0.15Mpa, carries out filling type, fills type and continue to be pressurized according to the pumping rate of setting after the completion；When
When the pressure difference value of lower work tank reaches 0.06Mpa, pressurize is carried out, the dwell time is set as 15min；To be in liquid after the completion of pressurize
The anti-clogging layer of state is steadily injected in mold, and pressure not etc. under the action of be cured as anti-clogging layer inner wall；
Pump valve pipeline is taken out in last release.
More than hydrophobic fibre powder is polyester fiber powder, and Hydrophobic plant blade is Rice Leaf.
Anti-clogging processing is carried out to three pump valve pipelines respectively according to three above embodiment, after the completion of processing, three pumps
The anti-clogging layer inner wall of valve pipeline can secure fit in the inner wall of pump valve pipeline, and in the pump valve pipeline in embodiment 3
The anti-clogging of wall is optimal, and inner wall is almost without boring adherency, and secondly, embodiment 1 is anti-blocking in three embodiments for embodiment 2
Poor-performing is filled in, but also significantly due to existing pump valve pipeline.
It is last it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention technical side and not restrictive
Case, it will be understood by those of ordinary skill in the art that, those are modified or replaced equivalently technical scheme of the present invention, and
The objective and range of the technical program are not departed from, is intended to be within the scope of the claims of the invention.
Claims (6)
1. a kind of anti-clogging processing method of pump valve pipeline, it is characterised in that：It is as follows：
（1）Inner wall Mold Making：
According to the size of pump valve pipeline and the thickness of reserved anti-clogging layer make in wall mould in case with；
（2）The making of anti-clogging layer：
By anti-clogging layer material according to weight proportion carry out dispensing, pulverize, add after sintering aid uniformly mixed, isostatic pressed into
Type, and it is placed in sinter molding in nonoxidizing atmosphere；It is sieved, obtained according to required size specification after being pulverized again after sinter molding
Anti-clogging layer powder is with spare；PET resin is added into smelting equipment, heating is molten into glue；By the anti-clogging layer powder of acquisition
End is added in gelatinous PET resin, is stirred evenly, is obtained the anti-clogging layer being in a liquid state；
（3）Anti-clogging layer and the inner wall for the gun barrel that discharges mutually are molded；
By step（2）The anti-clogging layer injection cast insulation crucible being in a liquid state is obtained, to mould after mold is preheated to 112-135 DEG C
Have cavity stenciling coating, then mold；It will be cast in the anti-clogging layer injection mold being in a liquid state in heat preservation crucible according to anisobaric
Method carry out a liter liquid, fill type, pressurize, release；
Technological parameter is set first：Bleed pressure：0.85-1.1Mpa, simultaneous pressure：0.75-0.8Mpa, liquid speed degree is risen：55-
62mm/s, filling velocity：50-62mm/s, pumping rate：90-98mm/s；It is passed through simultaneously into mold cavity and heat preservation crucible
Compressed air, adjusting liter hydraulic coupling is 0.1-0.15Mpa, mold filling pressure 0.1-0.15Mpa, carries out filling type, fill after the completion of type
Pumping rate according to setting continues to be pressurized；When the pressure difference value of lower work tank reaches 0.06Mpa, pressurize, pressurize are carried out
Time is set as 10-15min；The anti-clogging layer being in a liquid state steadily is injected in mold after the completion of pressurize, and the work in pressure not etc.
Anti-clogging layer inner wall is cured as under；
Pump valve pipeline is taken out in last release.
2. a kind of anti-clogging processing method of pump valve pipeline according to claim 1, it is characterised in that：The step（3）
In the anti-clogging layer being in a liquid state injection cast insulation crucible in before also need to add in and hydrophobic fibre powder and stir；It is described hydrophobic
Property fiber dust addition be anti-clogging layer quality 5-12%.
3. a kind of anti-clogging processing method of pump valve pipeline according to claim 1, it is characterised in that：The step（2）
The constituent of middle anti-clogging layer material and each ingredient percent are respectively：Silicon nitride：66-82%, crystalline flake graphite：10-
20%th, Hydrophobic plant blade：8-15%；The weight of the sintering aid is the 15-20% of anti-clogging layer weight.
4. a kind of anti-clogging processing method of pump valve pipeline according to claim 1, it is characterised in that：The step（2）
Middle sintering aid is at least arbitrary two kinds of combination in zirconium oxide, aluminium oxide, silica, calcium oxide and magnesia.
5. a kind of anti-clogging processing method of pump valve pipeline according to claim 2, it is characterised in that：The hydrophobicity is fine
Dimension powder is polyester fiber powder.
6. a kind of processing method of anti-clogging discharging gun barrel according to claim 3, it is characterised in that：The hydrophobicity is planted
Object blade is Rice Leaf.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109550672A (en) * | 2018-11-21 | 2019-04-02 | 江苏瑞洁环境工程科技有限责任公司 | A kind of cleaning shaft inner surface antistatic process technique |
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| CN105315749A (en) * | 2014-08-05 | 2016-02-10 | 东莞金太阳研磨股份有限公司 | Anti-electrostatic wet-and-dry anti-blockage coating layer and preparation method therefor |
| CN105903666A (en) * | 2016-04-28 | 2016-08-31 | 安徽瑞联节能科技有限公司 | Anti-blockage treatment method for discharge gun barrel |
| CN105921390A (en) * | 2016-04-28 | 2016-09-07 | 安徽瑞联节能科技有限公司 | Manufacturing method for anti-blocking discharging barrel |
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| CN109550672A (en) * | 2018-11-21 | 2019-04-02 | 江苏瑞洁环境工程科技有限责任公司 | A kind of cleaning shaft inner surface antistatic process technique |
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Application publication date: 20180629 |