CN209800359U

CN209800359U - Anticorrosion structure of water pump liquid passing part

Info

Publication number: CN209800359U
Application number: CN201821609092.3U
Authority: CN
Inventors: 刘帮良; 白文文
Original assignee: ZHEJIANG DAYUAN PUMP INDUSTRY Co Ltd
Current assignee: ZHEJIANG DAYUAN PUMP INDUSTRY Co Ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2019-12-17
Anticipated expiration: 2028-09-30

Abstract

The utility model relates to an anti-corrosion structure of a liquid passing part of a water pump; the pump comprises a cast iron pump body, wherein a pump cavity, and a runner inlet section and a runner outlet section which are respectively communicated with the pump cavity are arranged in the cast iron pump body; the method is characterized in that: the inner wall of the pump cavity and the inner wall surfaces of the flow passage inlet section and the flow passage outlet section are uniformly plated with a parylene anticorrosive coating. The advantage of adopting this anticorrosion structure lies in, when obtaining even, fine and close, safe and reliable anticorrosive coating, whole pump body does not pass through unnecessary high temperature process, and then can guarantee that the assembly precision of each part in the whole pump body and even the shape characteristic of self can not change.

Description

Anticorrosion structure of water pump liquid passing part

Technical Field

The utility model relates to a municipal administration water supply equipment field specifically is an anticorrosive structure of water pump liquid passing part.

Background

In municipal works, pipelines for domestic water supply cannot generate water quality pollution and must strictly meet the requirements of drinking water certification. In domestic water supply pipelines, water pumps are the main flooding component, the material of which is usually iron casting. In order to prevent corrosion, the iron liquid passing parts of the existing water pump are generally subjected to anti-corrosion treatment by adopting an electrophoresis or enamel process. But the electrophoresis process is adopted to treat the surface, the anti-corrosion effect is not ideal, and particularly the sanitary standard of the drinking water cannot be met; the operating conditions of the enamel process are very harsh, and the pump body needs to be heated to over 700 ℃ in the enamel process, so that parts are seriously deformed, the size change is large, products are difficult to assemble, and the performance and the operating efficiency of liquid passing parts of the water pump are reduced.

disclosure of Invention

The invention aims to overcome the defects and shortcomings and provide an anti-corrosion structure for a liquid passing part of a water pump, which does not need high-temperature heating and does not form a thick coating.

In order to achieve the above object, the present invention is realized as follows:

an anti-corrosion structure of a liquid passing part of a water pump; the pump comprises a cast iron pump body, wherein a pump cavity, and a runner inlet section and a runner outlet section which are respectively communicated with the pump cavity are arranged in the cast iron pump body; the inner wall of the pump cavity and the inner wall surfaces of the flow passage inlet section and the flow passage outlet section are uniformly plated with a parylene anticorrosive coating.

According to the anti-corrosion structure of the liquid passing part of the water pump, the parylene anti-corrosion coating comprises a parylene coating bottom layer and a parylene coating surface layer.

According to the anti-corrosion structure of the liquid passing part of the water pump, the parylene anti-corrosion coating is plated on the inner wall surface of the pump cavity and the inner wall surfaces of the runner inlet section and the runner outlet section in a vacuum coating mode, and the thickness of the anti-corrosion coating is 25-50 microns.

The anti-corrosion structure of the liquid passing part of the water pump further comprises an impeller, the impeller is arranged in the cast iron pump body, an annular spigot matched with the front end of the impeller is further arranged at the joint of the pump cavity and the runner inlet section, and a parylene anti-corrosion coating is plated on the surface of the annular spigot; the front end of the impeller and the annular spigot are mutually and directly matched to form a sealing gap, and a transition opening ring is not additionally arranged in the middle.

the anti-corrosion structure of the liquid passing part of the water pump is realized by numerically controlled machining at the front end and the annular spigot of the impeller.

the outer ends of the runner inlet section and the runner outlet section of the anti-corrosion structure of the water pump liquid passing part are respectively provided with a first flange and a second flange; the outer end faces of the first flange and the second flange are also plated with a parylene anticorrosive coating.

In the utility model, poly-p-xylene with environmental protection characteristic is used as an anti-corrosion stop and each liquid passing part in the pump body is subjected to anti-corrosion treatment by a vacuum coating process; therefore, the pump body after the processing steps has the characteristics of uniform thickness of an anti-corrosion surface layer, compactness, no pin hole, transparency, no stress, no auxiliary agent and no damage to a workpiece, and can effectively realize the aims of moisture prevention, mildew prevention, corrosion prevention and salt mist corrosion prevention. Meanwhile, as the parylene has the excellent characteristics of non-adhesiveness, heat resistance, sliding property, wear resistance, weather resistance, chemical stability and the like, the body adopting the anti-corrosion structure can realize the requirements of conveying drinking water and ensuring the cleanness and no pollution of a water source to be conveyed, and can completely meet the sanitary standard.

Drawings

Fig. 1 is a schematic structural diagram of the pump body of the present invention.

Fig. 2 is an assembly schematic diagram of the middle pump body and the impeller of the present invention after being matched.

fig. 3 is an enlarged view at I of fig. 2.

FIG. 4 is a first schematic structural view of a vortex pump type self-priming pump employing the present technology.

FIG. 5 is a schematic diagram of a vortex pump type self-priming pump employing the present technology.

Detailed Description

The invention is further illustrated by the following specific examples.

As shown in FIG. 1 ~ and FIG. 3, the anti-corrosion structure of a water pump liquid passing component comprises a cast iron pump body 100, a pump cavity 110, a flow channel inlet section 120 and a flow channel outlet section 130 which are respectively communicated with the pump cavity 110 are arranged inside the cast iron pump body 100, the inner wall of the pump cavity 110 and the inner walls of the flow channel inlet section 120 and the flow channel outlet section 130 are respectively provided with a Parylene anti-corrosion coating 1. the Parylene anti-corrosion coating 1 specifically refers to one or a combination of several of Parylene N, Parylene C, Parylene D, Parylene F and Parylene HT.

The anti-corrosion layer of the anti-corrosion structure comprises a bottom layer coated with the parylene and a surface layer coated with the parylene, and is realized through a series of process routes, wherein the process routes are as follows: 1. cleaning (oil removal, grease removal and rust removal); 2, drying (cooling), 3, vacuum vapor deposition (vacuum coating); the specific implementation is generally carried out by adopting the following steps:

Step (1) degreasing and heating the processed liquid-passing part at high temperature to decompose and remove oil stains on the surface,

Cleaning and removing rust to enhance the adhesion of the Parylene (Parylene N, Parylene C, Parylene D, Parylene F, Parylene HT) coating,

Drying at low temperature (50 +/-5 ℃) in the step (3), cooling to normal temperature,

And (4) putting the device into equipment, vacuumizing, performing vapor deposition to form a Parylene (Parylene N, Parylene C, Parylene D, Parylene F and Parylene HT) coating with the thickness of 25-50um, and performing air cooling forming after heat preservation to obtain the cast iron liquid passing component 100.

An annular spigot 140 matched with the front end 210 of the impeller 200 is further arranged at the joint of the pump cavity 110 and the flow passage inlet section 120, and a Parylene (Parylene N, Parylene C, Parylene D, Parylene F, Parylene HT) anticorrosive layer is also arranged on the surface of the annular spigot 140; the front end 210 of the impeller 200 and the annular spigot 140 are directly matched with each other to form a sealing gap, and a stainless steel transition port ring is not required to be additionally arranged in the middle, so that the pump body manufacturing process can be simplified.

In addition, the size of the front end 210 of the impeller 200 and the size of the annular spigot 140 are both realized by an automatic numerical control machining means, so that the precision requirement of the size can be completely ensured, and a sealing gap less than or equal to 0.3mm can be realized, thereby reducing the leakage amount of the mouth ring when the water pump operates, improving the performance of the water pump and improving the volumetric efficiency.

Finally, the outer ends of the flow passage inlet section 120 and the flow passage outlet section 130 are respectively provided with a first flange 121 and a second flange 131, and the outer end faces of the first flange 121 and the second flange 131 are also provided with a Parylene (Parylene N, Parylene C, Parylene D, Parylene F, and Parylene HT) anticorrosive layer, so that the joints between the Parylene N, the Parylene C, the Parylene D, the Parylene F, and the Parylene HT) anticorrosive layer and other parts are prevented from being corroded, and the cleanliness of drinking water is further ensured.

As shown in fig. 4 ~ and fig. 5, the vortex type automatic self-priming pump can also adopt the anti-corrosion structure to perform anti-corrosion treatment, that is, an anti-corrosion coating is disposed on the matching surfaces of the water inlet cavity, the water outlet cavity, the flow channel and other devices in the pump body of the vortex type self-priming pump, and the anti-corrosion coating is also a parylene anti-corrosion coating obtained by a vacuum coating method.

The anti-corrosion structure and the anti-corrosion structure coating method have the advantages that when the uniform, compact, safe and reliable anti-corrosion coating is obtained, the whole pump body does not undergo an unnecessary high-temperature process, and the assembly precision of all the parts in the whole pump body and the shape characteristics of the parts can be guaranteed not to change.

Claims

1. An anti-corrosion structure of a water pump liquid passing part comprises a cast iron pump body, wherein a pump cavity, a runner inlet section and a runner outlet section are arranged in the cast iron pump body and are respectively communicated with the pump cavity; wherein, the inner wall of the pump cavity and the inner wall surfaces of the flow passage inlet section and the flow passage outlet section are uniformly plated with a parylene anticorrosive coating; the method is characterized in that: the parylene anticorrosive coating comprises a parylene coating bottom layer and a parylene coating surface; the parylene anticorrosive coating is plated on the inner wall surface of the pump cavity and the inner wall surfaces of the runner inlet section and the runner outlet section in a vacuum coating mode, and the thickness of the anticorrosive coating is 25-50 microns.

2. The corrosion prevention structure of a liquid passing part of a water pump according to claim 1, characterized in that: the pump also comprises an impeller, the impeller is arranged in the cast iron pump body, an annular spigot matched with the front end of the impeller is also arranged at the joint of the pump cavity and the runner inlet section, and a parylene anticorrosive coating is plated on the surface of the annular spigot; the front end of the impeller and the annular spigot are mutually and directly matched to form a sealing gap, and a transition opening ring is not additionally arranged in the middle.

3. The corrosion prevention structure of a liquid passing part of a water pump according to claim 2, characterized in that: the front end of the impeller and the annular spigot are both realized by numerical control machining.

4. The corrosion prevention structure of a liquid passing part of a water pump according to claim 2, characterized in that: the outer ends of the runner inlet section and the runner outlet section are respectively provided with a first flange and a second flange; the outer end faces of the first flange and the second flange are also plated with a parylene anticorrosive coating.