CN213540812U - Erosion-resistant repair coating for surface of impeller of slurry pump - Google Patents
Erosion-resistant repair coating for surface of impeller of slurry pump Download PDFInfo
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- CN213540812U CN213540812U CN202022573555.9U CN202022573555U CN213540812U CN 213540812 U CN213540812 U CN 213540812U CN 202022573555 U CN202022573555 U CN 202022573555U CN 213540812 U CN213540812 U CN 213540812U
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Abstract
The utility model provides a resistant erosion repair coating for sediment thick liquid pump impeller surface, belongs to the repair coating field on sediment thick liquid pump impeller surface, can solve the repair bonding strength of current sediment thick liquid pump wearing and tearing impeller relatively poor, the problem that spraying coating technique is wasted time and energy, including the epoxy priming paint layer, tiny particle carborundum repair paint layer and carborundum ceramic finish paint layer, the epoxy priming paint layer is located sediment thick liquid pump impeller surface, tiny particle carborundum repair paint layer is located epoxy priming paint layer surface, carborundum ceramic finish paint layer is located tiny particle carborundum repair paint layer surface. The utility model discloses a supporting system of protective coating can be used for restoreing the sediment thick liquid pump impeller surface by wearing and tearing, and the composite coating that forms has strong cohesiveness, erosion-resistant and advantage such as corrosion-resistant, and this coating system easy operation, with low costs have realized sediment thick liquid pump impeller surface repair and long-term protection, have prolonged life.
Description
Technical Field
The utility model belongs to the restoration coating field on sediment thick liquid pump impeller surface, concretely relates to resistant erosion restoration coating for sediment thick liquid pump impeller surface.
Background
The slurry pump is a widely-used general-purpose machine mainly used for conveying solid-liquid mixture, but the abrasion of solid particles to the slurry pump is always a major problem which troubles the technical development of the slurry pump. The impeller is used as the 'heart' of the pump and is the most important part of a slurry pump, and the hydraulic performance of the pump is mainly determined by the hydraulic performance of the impeller. Most of the slurry pumps fail due to serious abrasion of the overflowing part, wherein the abrasion failure of the impeller is the most common and the service life is the shortest. To improve the service life of the slurry pump, it is most important to improve the service life of the impeller. The damage of the impeller of the slurry pump caused by the mechanical action of slurry is mainly divided into three main categories: erosion damage caused by impact of solid particles contained in the fluid, cavitation damage, and damage caused by friction and the like. The use time at any time is prolonged, the slurry pump is gradually abraded due to continuous scouring of solids and liquid, particularly, the abrasion of the outlet of the blade is the most serious, and the abrasion of the flow passage part of the slurry pump often reduces the production efficiency and the economic benefit.
Reportedly, the slurry pump replaces parts such as impellers and pump shafts, and the replacement cost is about 4 ten thousand yuan; if the replacement spare parts are replaced by repairing the surfaces of the overflowing parts, the repairing cost is about 0.8 ten thousand yuan, and 1/5 of the cost required by replacing the parts is not needed, so that the repairing of the worn impeller of the slurry pump has important application economic value according to the principle of saving and increasing efficiency. The conventional repair method is to realize repair by spraying an anticorrosive coating, the sprayed coating is usually made of epoxy resin, organic silicon resin or polyurethane resin, and it has also been reported that in order to further improve the erosion resistance of the repaired coating, ceramic particles are usually added into the resin as a filler to further enhance the wear resistance of the coating; however, epoxy resin has brittleness, poor impact resistance and poor heat resistance, while silicone resin and polyurethane resin are often poor in bonding strength with a substrate, the spraying coating technology is time-consuming and labor-consuming, and the repaired effect is general, and the service life of the flow passage part repaired by spraying the silicone modified epoxy resin is reported to be more than 3 months.
Disclosure of Invention
The utility model discloses repair bonding strength to current sediment stuff pump wearing and tearing impeller is relatively poor, and the problem that the spraying coating technique was wasted time and energy provides a resistant erosion repair coating that is used for sediment stuff pump impeller surface, should restore the coating and not only can restore the impeller by wearing and tearing, restores the coating and has very high bonding strength with sediment stuff pump impeller surface moreover, and the impeller after the restoration can resist the erosion and tear of sediment thick liquid effectively. The utility model discloses a to restoration and long-term protection on sediment thick liquid pump impeller surface, reduced the maintenance and changed the expense, prolonged sediment thick liquid pump life, be particularly useful for the protection of impeller internal surfaces such as sewage pump, papermaking pump and irrigation pump.
The utility model adopts the following technical scheme:
the utility model provides an erosion-resistant repair coating for sediment pulp pump impeller surface, includes epoxy priming paint layer, small granule carborundum repair paint layer and carborundum ceramic finish paint layer, and the epoxy priming paint layer is located sediment pulp pump impeller surface, and small granule carborundum repair paint layer is located epoxy priming paint layer surface, and carborundum ceramic finish paint layer is located small granule carborundum repair paint layer surface.
The thickness of the epoxy primer layer is 20-50 um.
The thickness of the silicon carbide ceramic finish paint layer is 20-50 um.
The total thickness of the epoxy primer layer, the small-particle silicon carbide repairing paint layer and the silicon carbide ceramic finish paint layer is the same as the depth of the defect to be repaired on the surface of the impeller of the slurry pump.
The utility model discloses a because the effect as follows:
the erosion-resistant repair protective coating 1) of the utility model adopts a matching system of an epoxy primer layer, a small-particle silicon carbide repair paint layer and a silicon carbide ceramic finish paint layer, wherein the epoxy primer adopts an epoxy ceramic primer, thereby effectively increasing the bonding force between the coating and a metal substrate and preventing the coating material from peeling off due to the scouring action of a liquid medium; the mass content of the silicon carbide ceramic particles in the small-particle silicon carbide repairing paint layer is more than or equal to 60%, the micro-nano silicon carbide ceramic particles are distributed in a grading manner, the scouring wear of a slag slurry medium can be resisted, the wear resistance degree of the micro-nano silicon carbide repairing paint layer can be increased by about 2-5 times compared with that of the original alloy steel, and the micro-nano silicon carbide repairing paint layer has a good scouring corrosion resistance effect; the silicon carbide ceramic top paint layer is used as a top coating, has a certain erosion resistance effect, and also has good anti-scaling performance. 2) The erosion-resistant repair coating is simple to operate and low in cost, has the advantages of erosion resistance, corrosion resistance, high temperature resistance and the like, realizes the repair of the surface of the impeller of the slurry pump, and prolongs the service life.
Drawings
FIG. 1 is a schematic structural view of a coating according to the present invention;
wherein: 1-slurry pump impeller; 2-an epoxy primer layer; 3-repair paint layer of small-particle silicon carbide; 4-silicon carbide ceramic finish paint layer.
Fig. 2 is a graph of the coating erosion experiment result of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown, an erosion-resistant repair coating for a surface of a slurry pump impeller includes an epoxy primer layer, a small particle silicon carbide repair paint layer, and a silicon carbide ceramic topcoat layer, as shown in fig. 1. The epoxy ceramic primer layer is coated on the surface of the impeller of the slurry pump subjected to sand blasting, and the small-particle silicon carbide repair paint layer and the silicon carbide ceramic finish paint layer are sequentially coated on the epoxy primer layer.
The epoxy ceramic primer adopts Siyi philosophy SYZO android ceramic primer (model: 33081) or Shishengweisa 911 nanometer wear-resistant paint; the refinishing paint is Siyi philosophy SYZO Schzelle small-particle silicon carbide refinishing paint (model: 33089), next Kun glue industry wear-resistant refinishing agent YK-3215 or Luoyang Putt-resistant composite ceramic material (model: NPT 12-14); the brush coating agent adopts Siyi philosophy SYZO silicon carbide ceramic brush coating agent (model: 33084) or Shishengweisa ZS-1031 wear-resistant anticorrosive paint.
The epoxy primer adopts a component A (white pasty solid), a curing agent (light yellow liquid) and a diluent, and the mixing mass ratio of the component A to the curing agent is (8-10): 1: (0-2), the small-particle silicon carbide refinishing paint adopts a component A (black paste solid) and a curing agent (white paste solid), and the mixing mass ratio of the component A to the curing agent is 8: 1, the silicon carbide ceramic finish paint adopts a component A (black paste solid), a curing agent (honey-like viscous fluid) and a diluent, and the mixing mass ratio of the component A to the curing agent is 4: 1: (0-2).
The specific implementation process is as follows:
101) surface treatment: treating the slurry pump impeller to be repaired, removing a floating rust layer of the slurry pump impeller to be repaired by adopting a sand blasting method, wiping the surface with alcohol, and removing dust and oil stains on the surface.
102) Coating an epoxy primer layer: and (3) adding 10 parts of component A (white pasty solid) and 1 part of curing agent (light yellow liquid) by balance into a container, stirring until the component A and the curing agent are completely mixed, brushing a primer on the surface of the impeller in the step 101) by using a brush, and drying for 2 hours.
103) Coating a small-particle silicon carbide repair paint layer: the preparation method comprises the following steps of weighing 10 parts of component A (black paste solid) and 1 part of curing agent (white paste solid) on a hard plate (or in a container), repeatedly stirring by using a scraper until the component A and the curing agent are completely mixed (the white paste solid disappears), coating the paint on a primer (the thickness is more than 5 mm) by using the scraper or manually, pressing and smearing the paint uniformly by using hands, and repeatedly scraping by using the scraper until the surface is smooth. For the area where the hanging plate is inconvenient to use, the small-particle silicon carbide refinishing paint can be directly pressed and covered on the position to be repaired by fingers with the half-finger rubber gloves.
And after the small-particle silicon carbide refinishing paint is completely cured, polishing the surface of the coating by using an angle grinder or a grinding wheel to flatten the surface.
103) Coating the silicon carbide ceramic brush coating agent layer: and (3) weighing 4 parts of the component A (black paste solid) and 1 part of the curing agent (honey in viscous fluid) in a container, uniformly stirring by using a stirring rod, after the intermediate paint is dried for 2-3 hours (touched by hands and not adhered), coating finish paint by using a brush, and then drying for more than 24 hours.
And (3) performance testing: the prepared coating is tested by a coating sand falling abrasion resistance test (SY/T0315-97) and is not less than 3L/um.
The composite coating prepared above is placed in 100-200-mesh quartz sand slurry to carry out an erosion and wear test, the water flow pressure is 2MPa, the erosion time is 60 minutes, the erosion angle is 90 degrees, and the results of the erosion test are shown in FIG. 2. It can be seen from fig. 2 that the surface of the composite coating layer manufactured as described above has no significant change.
In conclusion, the primer of the composite coating adopts the epoxy primer, so that the bonding force between the coating and the metal substrate is effectively increased, the coating material can be prevented from being peeled off due to the scouring action of the liquid medium, and the bonding strength between the primer layer and the bonding layer of the substrate is more than or equal to 15 MPa; the small-particle silicon carbide refinishing paint adopts highly dispersed alumina and silicon carbide micro-nano ceramic filler, has stable property and large energy storage effect, can effectively resist the scouring damage of liquid medium, has the wear resistance degree which is more than 5 times that of the original alloy steel, and has good scouring corrosion resistance; the silicon carbide ceramic brush coating agent is used as a top coating, has a certain erosion resistance effect, and also has good anti-scaling performance. The protective coating matching system has the advantages of being simple in operation, low in cost, erosion resistant, corrosion resistant, high temperature resistant and the like, the surface of the damaged slurry pump impeller is repaired, and the service life is prolonged.
Claims (4)
1. An erosion-resistant repair coating for the surface of an impeller of a slurry pump is characterized in that: the repair paint comprises an epoxy primer layer, a small-particle silicon carbide repair paint layer and a silicon carbide ceramic finish paint layer, wherein the epoxy primer layer is positioned on the surface of a slurry pump impeller, the small-particle silicon carbide repair paint layer is positioned on the surface of the epoxy primer layer, and the silicon carbide ceramic finish paint layer is positioned on the surface of the small-particle silicon carbide repair paint layer.
2. An erosion-resistant repair coating for a surface of an impeller of a slurry pump according to claim 1, wherein: the thickness of the epoxy primer layer is 20-50 um.
3. An erosion-resistant repair coating for a surface of an impeller of a slurry pump according to claim 1, wherein: the thickness of the silicon carbide ceramic finish paint layer is 20-50 um.
4. An erosion-resistant repair coating for a surface of an impeller of a slurry pump according to claim 1, wherein: the total thickness of the epoxy primer layer, the small-particle silicon carbide repairing paint layer and the silicon carbide ceramic finish paint layer is the same as the depth of the defect to be repaired on the surface of the impeller of the slurry pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022573555.9U CN213540812U (en) | 2020-11-10 | 2020-11-10 | Erosion-resistant repair coating for surface of impeller of slurry pump |
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| CN202022573555.9U CN213540812U (en) | 2020-11-10 | 2020-11-10 | Erosion-resistant repair coating for surface of impeller of slurry pump |
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| CN213540812U true CN213540812U (en) | 2021-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115716036A (en) * | 2022-10-25 | 2023-02-28 | 中国水利水电科学研究院 | Erosion-resistant protective coating structure for pump body of water pump in irrigation area and implementation method |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115716036A (en) * | 2022-10-25 | 2023-02-28 | 中国水利水电科学研究院 | Erosion-resistant protective coating structure for pump body of water pump in irrigation area and implementation method |
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Effective date of registration: 20230120 Address after: Building 8, No. 18, Xingye East Road, Xiepu Town, Zhenhai District, Ningbo City, Zhejiang Province, 315000 Patentee after: NINGBO SIYIZHE NEW MATERIAL TECHNOLOGY Co.,Ltd. Address before: 037009 No. 405 Xingyun Street, Datong City, Shanxi Province Patentee before: SHANXI DATONG University |