CN201671641U - Hydraulic single column extruded and coated with abrasion, corrosion and impact resistant polyurea layer - Google Patents
Hydraulic single column extruded and coated with abrasion, corrosion and impact resistant polyurea layer Download PDFInfo
- Publication number
- CN201671641U CN201671641U CN2010201774717U CN201020177471U CN201671641U CN 201671641 U CN201671641 U CN 201671641U CN 2010201774717 U CN2010201774717 U CN 2010201774717U CN 201020177471 U CN201020177471 U CN 201020177471U CN 201671641 U CN201671641 U CN 201671641U
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- corrosion
- plunger rod
- polyurea layer
- cylinder barrel
- single column
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Abstract
A hydraulic single column extruded and coated with an abrasion, corrosion and impact resistant polyurea layer comprises a single column cylinder barrel and a single column plunger rod and is characterized in that the inner wall of the single column cylinder barrel and the outer surface of the single column plunger rod are respectively extruded and coated with an abrasion, corrosion and impact resistant polyurea layer. The polyurea layer extruded and coated on the inner wall of the single column cylinder barrel not only fills and levels up appeared corrosive pits, but also forms a continuous, uniform and smooth abrasion and corrosion resistant polyurea layer on the inner wall of the cylinder barrel, so that the contact of a hydraulic medium with metal is completely isolated, thereby avoiding the corrosion of the hydraulic medium to the inner wall of the cylinder barrel and also eliminating the hidden trouble of electrochemical corrosion; and the excircle surface of the plunger rod is extruded and coated with an abrasion and corrosion resistant polyurea layer with high elasticity to reduce the impact of gun-collapsed and struck stones to the plunger rod in a manner of overcoming hardness with softness and also prevent the corrosion of the plunger rod.
Description
Technical field:
The utility model belongs to the support apparatus of down-hole, and particularly a kind of squeezing and coating have the hydraulic pressure monomer column of wear-and corrosion-resistant shock resistance polyurea layer.
Background technology
The coal mine support hydraulic single prop is that use amount is big in the present Coal Production, to the also bigger support apparatus of Safety of Coal Mine Production influence.
The present cylinder barrel of the hydraulic single prop that uses, employing be that the electro-coppering of steel pipe inwall is anticorrosion, plunger outer round surface phosphatization is handled or chromium plating corrosion-resistant technology.
The hydraulic medium of hydraulic pressure monomer column is to add emulsion with mine water to form, and general colliery mine water sulfur-bearing height has certain corrosion inhibition though add emulsion, and this hydraulic medium still has suitable corrosivity to monomer column.The technology of the plating corrosion resistant metal that uses is cathodic protection to iron and steel now, because the potential difference of metal lining and iron and steel certainly leads to electrochemical corrosion, has accelerated corrosion rate when defective or damage appear in coating.Multiple spot corrosion more than the 1mm has just appearred reaching deeply in the inner wall of cylinder that has in some months, see Fig. 1, because hot spot is the irregular dell of point-like, causes the rubber seal on the plunger to seal these hot spots; Coarse hot spot also can scratch rubber seal makes the sealing ring damage cause letting out in the hydraulic prop, loses the required pressure of supporting, produces potential safety hazard and also causes hydraulic prop to scrap.The plunger of individual prop is owing to be exposed to outside the cylinder barrel when using, and the rubble coal cinder that explosion produced when big gun was adopted construction forms the impulse breakdown topping to plunger rod, makes topping ineffective, produces heavy corrosion, as shown in Figure 2.
The method of repairing the monomer column that lost efficacy all adopts the increasing internal diameter of cylinder at present, press-fits the thin-wall stainless steel cover, corrodes the slight copper-plated technology of refurbish.Plunger rod adopts again phosphatization to handle or electroplating technique.But because cylinder barrel adds large diameter, the method that press-fits the stainless steel thin-wall cover has reduced the rigidity of cylinder barrel, has reduced support capacity, the helpless selection of real genus.Add that this technology investment is big, the technology difficulty height requires height to attendant's technical quality, and medium-sized following colliery is difficult to this method monomer column be keeped in repair.Again copper-plated technology is also because of environmental protection, and cost and corrosion reason such as can't be electroplated more deeply and can't extensively be adopted.Plunger rod carries out the also general colliery of alramenting or electroplating technology again to be difficult to use.
In sum, coal mine support hydraulic pressure monomer column mainly exists the inner wall of cylinder corrosion fast at present, and electrochemical corrosion is arranged especially, and plunger rod surface big gun collapses destruction, and the highly difficult big general applying unit of existing service technique cost is difficult to deficiencies such as place under repair.
The utility model content
At above-mentioned deficiency, the utility model proposes the hydraulic pressure monomer column that a kind of squeezing and coating have wear-and corrosion-resistant shock resistance polyurea layer, it can overcome the shortcoming that prior art exists.
This squeezing and coating that the utility model proposes have the hydraulic pressure monomer column of wear-and corrosion-resistant shock resistance polyurea layer, comprise monomer column cylinder barrel and monomer column plunger rod parts, feature is: the external surface squeezing and coating of the inner wall of cylinder of monomer column cylinder barrel and monomer column plunger rod have one deck wear-and corrosion-resistant shock resistance polyurea layer.
Said polyureas bed thickness 0.05～0.07mm.
The utility model makes it not only to have filled and led up the corrosion pit that occurred but also forms one deck polyureas film of uniform and smooth wear-resistance and anti-corrosion continuously in inner wall of cylinder in hydraulic cylinder inwall squeezing and coating polyurea layer, thoroughly isolated hydraulic medium contacts with metal, has avoided hydraulic medium the corrosion of inner wall of cylinder also to be eliminated the hidden danger of electrochemical corrosion.In the elastomeric wear-and corrosion-resistant polyurea layer of plunger rod outer round surface squeezing and coating one deck, alleviated big gun with the mode of defeating a force with a tenderness and collapsed and hit stone has prevented plunger rod again to the impact of plunger rod corrosion; This invention is an environmental friendliness, have very high practical value, promising again project.
Description of drawings:
Fig. 1 is the corrosion condition schematic diagram of existing monomer column cylinder barrel.
Fig. 2 is existing monomer column plunger rod corrosion condition schematic diagram.
Fig. 3 is the schematic diagram after the utility model monomer column inner wall of cylinder squeezing and coating polyurea layer.
Fig. 4 is the schematic diagram after the utility model monomer column plunger rod external surface squeezing and coating polyurea layer.
Label among the figure is: 1-monomer column cylinder barrel, 2-hot spot, 3-monomer column plunger rod, 4-polyurea layer.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Shown in Fig. 3,4, must carry out the degreasing and rust removal processing to monomer column cylinder barrel and plunger rod earlier before the squeezing and coating polyureas, processing of rust removing is thoroughly removed the coating and the phosphate coating of corrosion and damage totally with sand-blast, makes to wait that the cleannes that are coated with the surface reach the Sa2.5 level, and forms certain roughness; Sandblast is finished in totally enclosed sand-blasting machine.Operating personnel do not contact the sandblast dust with the work workshop, and environment is not polluted.The cylinder barrel handled well and plunger are injected the polyureas that measures with the squeezing and coating facility carry out squeezing and coating, squeezing and coating time 10～20min, it is slightly variant to look differences such as temperature, air humidity.Otherwise temperature height, the appropriate to the occasion weak point of high humidity are then long a bit.Perusal to corrosion pit has been filled and led up whole cylinder barrel inner surface or plunger rod external surface and has been coated with and does not evenly hang stream again and get final product during squeezing and coating.The polyurea materials solid content 100% no organic property volatile matter COV that adopts, do not have solvent evaporates in the curing of coating process, the continuous property of polymeric membrane dense non-porous crack connection that solidify to form is good, connects and the intensity height with matrix, contacting of corrosive medium and metal can be completely cut off effectively, the needs of actual condition can be satisfied.Utilize the characteristic of polyureas corrosion-proof wear, the application life of hydraulic pressure monomer column that makes the squeezing and coating polyureas is apparently higher than the hydraulic pressure monomer column of present use.
In order to guarantee the squeezing and coating layer in worker's difference scope, the squeezing and coating head will adopt the another fixed flexible material of certain rigidity.The allowance below nominal size that the excircle dimension that is used for the endoporus squeezing and coating head of cylinder barrel must be machined to the cylinder barrel size subtracts 0.05mm, the interior hole dimension that is used for the cylindrical squeezing and coating head of plunger rod must be machined to the last poor 0.05mm of adding of plunger rod size, can guarantee that like this squeezing and coating just can form the polyurea film of thick 0.05～0.07mm, and overall dimensions guarantees in worker's difference scope.
The material of squeezing and coating plunger rod is identical with the material foundation material of squeezing and coating cylinder barrel, and just component proportioning difference makes coating more soft, has more elasticity, to alleviate the injury that big gun collapses rubble, to reach the purpose of defeating a force with a tenderness.Squeezing and coating machinery can adopt can do straight-line hydraulic pressure, pneumatic or machine driving, and movement length is greater than cylinder barrel or plungers length, the device of adjustable-speed.General middle-size and small-size mine is as long as increase pre-processing device and squeezing and coating device again, and operating personnel get final product through short-term cultivation.
This invention then can replace high pollution technologies such as copper facing, chromium plating, phosphatization processing as adopting when the hydraulic pressure monomer column is made, and the processing of the correct grinding of cylinder barrel endoporus can change semifinishing into.Plunger rod also can change the processing of half finish turning into, and the shortening production cycle reduces cost.
Claims (2)
1. squeezing and coating have the hydraulic pressure monomer column of wear-and corrosion-resistant shock resistance polyurea layer, comprise monomer column cylinder barrel and monomer column plunger rod parts, it is characterized in that: the external surface squeezing and coating of the inner wall of cylinder of monomer column cylinder barrel and monomer column plunger rod have one deck wear-and corrosion-resistant shock resistance polyurea layer.
2. squeezing and coating as claimed in claim 1 have the hydraulic pressure monomer column of wear-and corrosion-resistant shock resistance polyurea layer, it is characterized in that: said polyureas bed thickness 0.05～0.07mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201774717U CN201671641U (en) | 2010-05-04 | 2010-05-04 | Hydraulic single column extruded and coated with abrasion, corrosion and impact resistant polyurea layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201774717U CN201671641U (en) | 2010-05-04 | 2010-05-04 | Hydraulic single column extruded and coated with abrasion, corrosion and impact resistant polyurea layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201671641U true CN201671641U (en) | 2010-12-15 |
Family
ID=43329053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201774717U Expired - Fee Related CN201671641U (en) | 2010-05-04 | 2010-05-04 | Hydraulic single column extruded and coated with abrasion, corrosion and impact resistant polyurea layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201671641U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466071A (en) * | 2013-08-23 | 2013-12-25 | 中国航空工业集团公司西安飞机设计研究所 | Corrosion protection method for closed room structure |
| CN103982653A (en) * | 2014-05-30 | 2014-08-13 | 四川中物泰沃新材料有限公司 | Anti-corrosion wear-proof hydraulic cylinder plunger and manufacturing method thereof |
-
2010
- 2010-05-04 CN CN2010201774717U patent/CN201671641U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466071A (en) * | 2013-08-23 | 2013-12-25 | 中国航空工业集团公司西安飞机设计研究所 | Corrosion protection method for closed room structure |
| CN103982653A (en) * | 2014-05-30 | 2014-08-13 | 四川中物泰沃新材料有限公司 | Anti-corrosion wear-proof hydraulic cylinder plunger and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20130504 |