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Waste water pump repairing and coating method

A technology for waste and water pumps, which is applied to coatings, devices for coating liquid on surfaces, and surface pretreatment, etc. It can solve problems such as reduced water extraction efficiency, low-efficiency operation of water pumps, and damage to pump bodies, and achieves improved gas resistance. Erosion and wear ability, smooth water flow through the flow channel, and the effect of improving the bonding strength

Inactive Publication Date: 2013-06-19
何应吉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The irrigation and lifting projects in the Yellow River Basin all draw water from the main and tributaries of the Yellow River with a lot of sediment. The pumps are seriously damaged by cavitation and wear, which reduces the efficiency of water lifting, affects the timely water use of crops, increases irrigation costs, and increases the burden on the beneficiaries. Engineering benefits
Due to the high cost of water pump renewal, most of the water pumps in most irrigation areas operate inefficiently, and even some irrigation area water pumps are still in use when the efficiency is only more than ten percent, and the water pumps are mainly scrapped due to the damage of the pump body

Method used

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  • Waste water pump repairing and coating method

Examples

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Effect test

Embodiment 1

[0025] Example 1 The method for repairing and coating the waste water pump includes the following steps:

[0026] ⑴Preparation work: first set up the heat preservation shed, then use the air compressor to drive the sandblasting gun to derust the painted surface of the waste pump body until the fresh metal surface is completely exposed, and finally, make the waste pump body and the heat preservation shed reach 20~30°C .

[0027] ⑵Repair of the diaphragm of the waste pump body: Use an acetylene torch to burn and remove the old coating on the damaged part of the diaphragm, remove the edge of the damaged diaphragm and make it tidy; cut the steel plate with the same size and shape as the damaged diaphragm, and weld it According to the characteristic curve and operating conditions of the pump, the length of the tongue is shortened by 4~30mm, and the end of the tongue is close to the axis and impeller by 3~18mm; preheat the welding part to make the temperature 280 ~320℃, interm...

Embodiment 2

[0032] Example 2 The method for repairing and coating the waste water pump includes the following steps:

[0033] ⑴Preparation work: first set up a heat preservation shed, then use solvent acetone to clean the oil stains on the waste pump body, and then use an air compressor to drive a sandblasting gun to derust the painted surface of the waste pump body until the fresh metal surface is completely exposed. Finally, use The waste pump body and the heat preservation shed reach 20~30°C.

[0034] ⑵Repair of the diaphragm of the waste pump body: Use an acetylene torch to burn and remove the old coating on the damaged part of the diaphragm, remove the edge of the damaged diaphragm and make it tidy; cut the steel plate with the same size and shape as the damaged diaphragm, and weld it According to the characteristic curve and operating conditions of the pump, the length of the tongue is shortened by 4~30mm, and the end of the tongue is close to the axis and impeller by 3~18mm; p...

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Abstract

The invention relates to a waste water pump repairing and coating method, which includes the following steps of (1) doing preparations including building a heat-insulation shed, derusting to-be-coated surfaces of waste water pumps until fresh metal surfaces are exposed completely and then keeping the temperature of bodies of the waste water pumps and the heat-insulation shed within 20 DEGC-30 DEGC; (2) repairing tongues of the waste water pumps; (3) repairing the bodies and sealing ring joint surfaces of the waste water pumps; (4) repairing grooves on split surfaces of the waste water pumps;(5) reinforcing the bodies of the waste water pumps locally; and (6) repairing and coating passages of the bodies of the waste water pumps. Different damage portions of the waste water pumps can be coated with different coatings, so that cavitation abrasion resistance capacity of the waste water pumps is strengthened greatly, performances of the water pumps can be improved greatly, electric powercan be saved, and cost for irrigation can be reduced.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to methods for repairing and coating waste water pumps. Background technique [0002] The irrigation and lifting projects in the Yellow River Basin all draw water from the main and tributaries of the Yellow River with a lot of sediment. The pumps are seriously damaged by cavitation and wear, which reduces the efficiency of water lifting, affects the timely water use of crops, increases irrigation costs, and increases the burden on the beneficiaries. Engineering benefits. Due to the high cost of updating water pumps, most of the water pumps in most irrigation areas operate inefficiently, and even in some irrigation areas, the water pump devices are still in use when the efficiency is only more than ten percent, and the water pumps are mainly scrapped due to the damage of the pump body. Contents of the invention [0003] The technical problem to be solved by t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/08B05D5/00B05D3/12B05D1/38B05D7/24
Inventor 何应吉
Owner 何应吉
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