CN218325447U - Enamel treatment device for surface of impeller of sewage pump - Google Patents

Abstract

The utility model discloses a sewage pump impeller surface enamel treatment device, including the impeller, the impeller has the technology minor axis through technology nut swing joint, the inside of impeller is provided with impeller blade, the lateral surface of impeller is provided with impeller surface enamel layer, the inside of impeller is provided with the impeller runner, the medial surface of impeller runner is provided with impeller internal surface enamel layer, the side surface of impeller blade is provided with blade surface enamel layer, impeller blade installs in the inside of impeller runner, S1, anneals the finished product impeller of casting to eliminate the casting stress of impeller, get rid of graphite, surface decarbonization, and annealing temperature control is at 750-800 ℃, and annealing time is 10-30 minutes; s2, placing the annealed impeller into a shot blasting machine for surface shot blasting treatment. Through the structure, the surface smoothness of the impeller is improved, the pumping efficiency is improved, and the abrasion resistance and the corrosion resistance of the impeller are improved.

Description

Enamel treatment device for surface of impeller of sewage pump

Technical Field

The utility model relates to a mechanical equipment makes technical field, in particular to sewage pump impeller surface enamel treatment device.

Background

The water pump is widely applied to industrial and agricultural production and daily production and life of the masses as a hydraulic lifting machine. The sewage pump is mainly used for conveying industrial wastewater of mining, petroleum, chemical industry, pharmacy, papermaking, power plants and the like and sewage of urban domestic sewage, municipal engineering and public facilities, and mainly conveys sewage containing certain particles and corrosiveness.

The sewage pump impeller is a core part of the water pump and is also a main wearing part. The design and the manufacturing process of the sewage pump directly determine the working efficiency, the liquid passing performance and the service life of the sewage pump.

At present, the design of the sewage pump impeller mainly adopts a large-flow-channel anti-blocking hydraulic design theory, and the technology is mature.

The sewage pump impeller is manufactured mainly by adopting a casting process, and the material is generally gray cast iron (cast steel and cast stainless steel are also adopted for casting production).

The prior sewage pump impeller has the disadvantages of pain points and defects in manufacturing and use:

(1) because the impeller is generally manufactured by adopting a casting process, the surface of an impeller flow passage is rough, and the working efficiency of the water pump is difficult to ensure.

(2) The passing performance of sewage dirt is not very good due to the rough surface of the impeller flow passage.

(3) Because the liquid that sewage pump carried generally has certain acid-base corrosivity, the material of impeller is generally not very good for grey cast iron corrosion resistance, and the impeller corrodes the damage easily, so the life of impeller is shorter.

(4) Since the sewage sludge to be conveyed contains a certain amount of particles, the impeller flow passage is easily worn.

(5) The replacement of the water pump impeller can affect normal production and use and increase the maintenance cost.

Therefore, an enamel treatment device for the surface of the impeller of the sewage pump is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at solves one of the technical problem that exists among the prior art at least, provides a sewage pump impeller surface enamel treatment device, can improve impeller surface smoothness degree, improves pumping efficiency, increases wear-resisting, the corrosion resisting property of impeller.

The utility model discloses still provide and have above-mentioned sewage pump impeller surface enamel treatment device, including the impeller, the impeller has the technology minor axis through technology nut swing joint, the inside of impeller is provided with impeller blade, the lateral surface of impeller is provided with impeller surface enamel layer, the inside of impeller is provided with the impeller runner, the medial surface of impeller runner is provided with impeller internal surface enamel layer, impeller blade's side surface is provided with blade surface enamel layer.

According to the enamel treatment device for the surface of the impeller of the sewage pump, the impeller blade is arranged inside the flow channel of the impeller.

A surface enamel treatment method for a sewage pump impeller comprises the following steps:

s1, annealing the cast finished impeller to eliminate the casting stress of the impeller, remove graphite and decarbonize the surface, wherein the annealing temperature is controlled to be 750-800 ℃, and the annealing time is 10-30 minutes;

s2, placing the annealed impeller into a shot blasting machine for surface shot blasting treatment;

s3, carefully checking the impeller flow passage after the surface shot blasting treatment, and selecting a proper polishing tool for polishing the untreated defects such as burrs, bonded sand, bulges and the like;

s4, cutting the outer surface, the shaft hole and the end face of the pretreated impeller according to the drawing size, wherein a fine machining allowance of 0.5mm is reserved in the shaft hole, and the key groove is well inserted;

s5, carrying out static balance inspection on the cut impeller;

s6, mounting the impeller with qualified static balance on a process short shaft, mounting a process nut and tightening;

s7, spraying base glaze: adopting a wet enameling method;

(1) Selecting base glaze suitable for cast iron enamel, preparing the selected base glaze material according to the process formula proportion, and fully and uniformly stirring;

(2) Horizontally placing the impeller and the process short shaft downwards stably, spraying the inner surface of the impeller flow channel by using prepared ground coat glaze slurry, then spraying the outer surface of the impeller, and performing continuous spraying as much as possible to ensure that the coating is uniform, wherein the thickness of the ground coat is controlled to be 0.08-0.12mm;

(3) Drying the sprayed impeller in a drying box at the drying temperature of 200-260 ℃ for 25-40 minutes;

(4) Carefully checking the dried impeller, and performing additional spraying or brushing by using a brush pen to dip bottom paste on the part which is missed to spray and is damaged by local powder layer, wherein the part needs to be dried again after small-area repair;

(5) And placing the repaired and dried impeller into a sintering furnace for sintering, wherein the sintering temperature is controlled to be 760-780 ℃, and the sintering time is controlled to be 12-16 minutes.

S8, surface glaze spraying:

(1) Checking the quality of the ground glaze layer of the fired impeller, and manually polishing the ground glaze particles, bulges and powder stalks caused by splashing and flowing by using a proper manual grinding tool;

(2) Leveling bubbles and pinholes generated by firing the ground glaze by using a manual grinding tool and then leveling by using the semi-dry ground glaze;

(3) The bottom glaze blank impeller which is qualified by inspection is dipped with sponge water to moisten the bottom glaze layer, the dry bottom glaze layer is discolored when meeting water, and the raw bottom glaze which is smeared when the front is repaired is avoided when watering is carried out;

(4) Selecting a cover glaze suitable for the cast iron enamel, preparing the selected cover glaze installation process formula in proportion and uniformly stirring;

(5) Carrying out surface glaze spraying on the impeller processed by the base glaze blank, wherein the surface glaze spraying is uniform, and the once spraying thickness is 0.12-0.18mm;

(6) Drying the sprayed impeller for the first layer of overglaze, wherein the drying temperature is controlled to be 180-230 ℃, and the drying time is controlled to be 25-40 minutes;

(7) Carefully checking the surface of the glazed and dried impeller, repairing and spraying, and then drying;

(8) The dried impeller is put into a firing furnace for firing, the firing temperature is controlled to be 720-760 ℃, and the firing time is controlled to be 12-16 minutes;

(9) And inspecting the impeller after the surface glaze is sintered, performing the next procedure if the surface glaze is qualified, and repairing, spraying and sintering again if the surface glaze is defective.

S9, firing the overglaze into a qualified impeller, removing the process nut and the process short shaft, and performing finish machining on the shaft hole;

and S10, mounting the finely machined sewage pump impeller on a sewage pump shaft head, and finally, carrying out a delivery test on a water pump test bed.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

FIG. 1 is a front sectional view of an enamel treatment device for the surface of a sewage pump;

FIG. 2 is a left side sectional view of the sewage pump surface enamel treatment device of the present invention.

Illustration of the drawings:

1. an impeller; 2. a process nut; 3. an enamel layer on the outer surface of the impeller; 4. an enamel layer on the inner surface of the impeller; 5. an impeller flow passage; 6. a process short shaft; 7. an impeller blade; 8. and (4) enamel layers on the surfaces of the blades.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

Referring to fig. 1-2, the embodiment of the present invention provides a sewage pump impeller surface enamel treatment device, which includes an impeller 1, the impeller 1 is movably connected with a process short shaft 6 through a process nut 2, an impeller blade 7 is arranged inside the impeller 1, and the impeller blade 7 is installed inside an impeller flow passage 5.

An impeller outer surface enamel layer 3 is arranged on the outer side surface of the impeller 1, an impeller flow passage 5 is arranged in the impeller 1, an impeller inner surface enamel layer is arranged on the inner side surface of the impeller flow passage 5, and a blade surface enamel layer 8 is arranged on the side surface of each impeller blade 7.

A sewage pump impeller surface enamel treatment method comprises the following steps:

s1, annealing the cast finished impeller 1 to eliminate casting stress of the impeller 1, remove graphite and decarbonize the surface, wherein the annealing temperature is controlled to be 750-800 ℃, and the annealing time is 10-30 minutes;

s2, placing the annealed impeller 1 into a shot blasting machine for surface shot blasting treatment;

s3, carefully checking the impeller flow passage 5 after the surface shot blasting treatment, and selecting a proper polishing tool for polishing the untreated defects such as burrs, bonded sand, bulges and the like;

s4, cutting the outer surface, the shaft hole and the end face of the impeller 1 which is well pretreated according to the drawing size, reserving a finish machining allowance of 0.5mm in the shaft hole, and inserting the key groove;

s5, carrying out static balance inspection on the cut impeller 1;

s6, mounting the impeller 1 with qualified static balance on the process short shaft 6, mounting the process nut 2 and tightening;

s7, spraying base glaze: adopting a wet enameling method;

1. selecting a ground glaze suitable for cast iron enamel, having good wettability to a cast iron blank body, having good dissolution effect on iron oxide, having a wider firing temperature, having sufficient adhesive strength and proper elasticity, preparing the selected ground glaze material according to a process formula proportion, and fully and uniformly stirring;

2. horizontally placing the impeller 1 and the technological short shaft 6 downwards stably, spraying the inner surface of the impeller runner 5 with prepared ground glaze slip, spraying the slip by adopting a pressure tank for glaze slip equipment, then spraying the outer surface of the impeller 1, and spraying the slip as much as possible to ensure that the coating is uniform, wherein the thickness of the ground glaze is controlled to be 0.08-0.12mm, and the ground glaze powder bulges, and powder peduncles flowing and accumulating at edges and corners caused by the dropping or splashing of the slip are smoothed by fingers;

3. putting the sprayed impeller 1 into a drying box for drying, wherein the drying temperature is controlled to be 200-260 ℃, and the drying time is controlled to be 25-40 minutes;

4. carefully checking the dried impeller 1, and performing additional spraying or brushing by using a brush pen to dip bottom paste on the part which is missed to spray and is damaged by local powder layer, wherein the part needs to be dried again after small-area repair;

5. and (3) placing the repaired and dried impeller 1 into a sintering furnace for sintering, wherein the sintering temperature is controlled to be 760-780 ℃, and the sintering time is controlled to be 12-16 minutes.

S8, surface glaze spraying:

1. checking the quality of the ground glaze layer of the impeller 1 after firing, and manually polishing the ground glaze particles, bulges and powder stalks caused by splashing and flowing by using a proper manual grinding tool;

2. leveling bubbles and pinholes generated by firing the ground glaze by using a manual grinding tool and then leveling by using the semi-dry ground glaze;

3. the qualified impeller 1 of the ground glaze blank is dipped in water by sponge to cause the ground glaze layer to be wet, the dry ground glaze layer is discolored when being wetted, and the ground glaze layer is prevented from being smeared when the front is repaired when being wetted;

4. selecting a cover glaze suitable for cast iron enamel, wherein the cover glaze has certain acid and alkali resistance, proper softening temperature and surface tension, better wear resistance and good surface gloss and covering power, and the selected cover glaze installation process formula is prepared in proportion and is stirred uniformly;

5. carrying out surface glaze spraying on the impeller 1 processed by the base glaze blank, wherein the surface glaze spraying is uniform, the thickness of one-time spraying is 0.12-0.18mm, and the spraying sequence of the base glaze is referred to during spraying so as to avoid re-spraying and missing spraying;

6. drying the first layer of overglaze on the sprayed impeller 1, wherein the drying is thorough, the drying temperature is controlled to be 180-230 ℃, and the drying time is controlled to be 25-40 minutes;

7. carefully checking, repairing and spraying the surface of the glazed dried impeller 1, and then drying;

8. placing the dried impeller 1 into a firing furnace for firing, wherein the firing temperature is controlled to be 720-760 ℃, and the firing time is controlled to be 12-16 minutes;

9. and (4) checking the impeller 1 after the surface glaze is sintered, performing the next procedure if the quality is qualified, and performing spraying and sintering again if the defects are repaired.

S9, firing the overglaze into a qualified impeller 1, removing the process nut 2 and the process short shaft 6, and performing finish machining on the shaft hole;

and S10, mounting the sewage pump impeller 1 after finish machining on a sewage pump shaft head, and finally carrying out a delivery test on a water pump test bed.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (2)

1. The enamel treatment device for the surface of the impeller of the sewage pump is characterized by comprising an impeller (1), wherein the impeller (1) is movably connected with a process short shaft (6) through a process nut (2), and impeller blades (7) are arranged in the impeller (1);

the lateral surface of impeller (1) is provided with impeller surface enamel layer (3), the inside of impeller (1) is provided with impeller runner (5), the medial surface of impeller runner (5) is provided with impeller surface enamel layer, the side surface of impeller blade (7) is provided with blade surface enamel layer (8).

2. The enamel treatment device for the surface of an impeller of a sewage pump as claimed in claim 1, wherein the impeller blades (7) are installed inside the impeller flow passage (5).

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