KR100460044B1 - Water supplying pump for seawater - Google Patents

Abstract

Disclosed is a drainage pump for seawater which prevents corrosion by seawater. The seawater drainage pump does not corrode due to the sacrificial anode connected to the housing, thereby extending the life of the product. In addition, it is economical because the housing can be manufactured using a low-cost general metal. In addition, the sacrificial positive electrode is installed through the fastening band, and the fastening band is coupled to the outer surface of the pump, so that the sacrificial positive electrode can be easily detached from the pump. This makes it possible to easily change the number and shape of the sacrificial anodes.

Description

Drainage Pump for Seawater {WATER SUPPLYING PUMP FOR SEAWATER}

The present invention relates to a seawater drainage pump which is prevented from being corroded by seawater.

The pump refers to a device for transferring fluid by the rotation of the motor, and the drainage pump for seawater refers to a pump used to discharge seawater by being immersed directly in the seawater.

A typical sea water drain pump has a metal housing. However, the metal housing is corroded by sea water, which makes it difficult to predict the life of the pump and to evaluate the performance.

In order to solve this disadvantage, a seawater drainage pump made of a stainless steel or titanium material has been developed, but this has a disadvantage in that the cost increases due to the high price.

The present invention was created to solve the problems of the prior art as described above, an object of the present invention is to install a sacrificial anode in the metal housing to prevent corrosion of the housing, thereby reducing the cost of seawater drainage pump In providing.

1 is an exploded perspective view of a part of a drainage pump for seawater according to an embodiment of the present invention.

FIG. 2 is a combined front view of FIG. 1. FIG.

Explanation of symbols on the main parts of the drawings

110 housing 120 head cover

130: casing 140: casing cover

160: sacrificial anode 170: fastening band

180: insulation member

Drainage pump for seawater according to the present invention for achieving the above object, a cylindrical housing of a metal material with a motor built-in, a head cover coupled to the upper side of the housing, a casing coupled to the lower side of the housing, the impeller is embedded, the casing In the water discharge pump having a casing cover coupled to the lower side, a first fastening member for coupling the housing and the head cover and a second fastening member for coupling the housing and the casing and the casing cover,

One end portion and the other end portion of the metal fastening band are connected to the first fastening member and the second fastening member, respectively, and the sacrificial anodes made of aluminum are penetrated and provided to be spaced apart from the casing by a predetermined distance.

Hereinafter, with reference to the accompanying drawings will be described in detail a seawater drain pump according to an embodiment of the present invention.

1 is a partially exploded perspective view of a drainage pump for seawater according to an embodiment of the present invention, Figure 2 is a combined front view of FIG.

As shown, the seawater drainage pump 100 according to the present embodiment has a cylindrical housing 110 of a metal material in which a motor (not shown) is built. The head cover 120 is installed on an upper surface of the housing 110, and a casing 130 having an impeller (not shown) is coupled to the lower surface of the housing 110. When the impeller is rotated by the motor, seawater flows into the bottom surface of the casing 130 and is discharged through the discharge pipe 131 on the upper surface. The casing cover 140 is connected to the bottom surface of the casing 130 in communication with the casing 130. In this case, the housing 110 and the head cover 120 are integrally coupled to each other by the first fastening member 151, and the housing 110, the casing 130, and the casing cover 140 are the second fastening members 155. ) Are integrally coupled to each other.

The seawater drainage pump according to the present embodiment is provided with a sacrificial anode (Galvanic Anode) 160 to prevent the housing 110, which is a metal material, from being corroded by seawater. The galvanic anode system (Galvanic Anode System) is a connection between the sacrificial anode, such as aluminum, magnesium, or zinc, which has a lower potential to the corroded metal than the corroded metal, and the corrugated metal. In this case, metal ions are eluted from the sacrificial anode, which is a low-potential metal, with the current. That is, the sacrificial anode, which is a low potential metal, is corroded instead of the metal to be corroded to prevent corrosion of the metal to be corroded.

The sacrificial anode 160 according to the present embodiment is aluminum having a specific gravity of 2.77, and the composition ratio thereof is shown in Table 1.

Ingredient ratio Aluminum according to the first embodiment Aluminum according to the second embodiment Aluminum according to the second embodiment Fe 0.1 0.1 0.1 Si 0.1 0.1 0.1 Cu 0.01 0.01 0.01 Zn 2.5 to 5.0 2.5 to 5.0 2.5 to 5.0 In 0.01 to 0.05 0.01 to 0.05 0.01 to 0.05 Mg 0.5 to 2.0 0.5 to 2.0 Ga 0.005 to 0.05 0.005 to 0.05 Ca 0.005 to 0.05 Al Remainder Remainder Remainder

Next, the installation structure of the sacrificial anode 160 made of aluminum will be described.

The sacrificial anode 160 of the rectangular parallelepiped is installed in the fastening band 170 made of a belt-shaped metal material and connected to the housing 110. In detail, one end and the other end of the fastening band 170 is connected to the first and second fastening members 151 and 155, respectively, and the through passage through which the fastening band 170 passes through the sacrificial anode 160. 161 is formed in the longitudinal direction. Thus, the housing 110 is connected to the sacrificial anode 160 using the fastening band 170 as a medium.

Then, a closed circuit is formed between the housing 110 and the sacrificial anode 160 of the seawater drainage pump 100 immersed in seawater, and the ionization energy of the sacrificial anode 160 is smaller than that of the housing 110. A reduction reaction occurs on the surface of the housing 110 and an oxidation reaction occurs on the sacrificial anode 160. As a result, the surface of the housing 110 and the first and second fastening members 151 and 155 are not corroded. The number of sacrificial anodes 160 is appropriately used.

An insulating member 180 is provided between the housing 110 and the sacrificial anode 160 to prevent the housing 110 and the sacrificial anode 160 from directly contacting each other. The reason why the insulating member 180 is provided between the housing 110 and the sacrificial anode 160 is to prevent the open circuit due to the exhaustion of the sacrificial anode 160. In detail, since the portion of the sacrificial anode 160 located closest to the housing 110 is quickly corroded, an epoxy coated insulation member 180 is provided between the housing 110 and the sacrificial anode 160 to prevent this. will be.

In addition, the surface of the sacrificial anode 160 facing the outside of the housing 110, that is, the surface of the sacrificial anode 160 which does not face the housing 110, is rounded to have the same curvature of the housing 110 to beautify the appearance. To form.

As described above, the seawater drainage pump according to the present invention does not corrode due to the sacrificial anode connected to the housing, thereby extending the life of the product.

In addition, it is economical because the housing can be manufactured using a low-cost general metal.

In addition, the sacrificial positive electrode is installed through the fastening band, and the fastening band is coupled to the outer surface of the pump, so that the sacrificial positive electrode can be easily detached from the pump. This makes it possible to easily change the number and shape of the sacrificial anodes.

In the above, the present invention has been described in accordance with one embodiment of the present invention, but those skilled in the art to which the present invention pertains have been changed and modified without departing from the spirit of the present invention. Of course.

Claims (6)

delete A cylindrical housing made of a metal with a motor, a head cover coupled to an upper side of the housing, a casing coupled to a lower side of the housing and a built-in impeller, a casing cover coupled to a lower side of the casing, and coupling the housing and the head cover. A first fastening member configured to couple the second fastening member to the housing, the casing and the casing cover, a fastening band of a metal material having one end and the other end connected to the first fastening member and the second fastening member, and the fastening member A seawater drainage pump having a sacrificial anode disposed through a band and an insulating member provided between the housing and the sacrificial anode, The sacrificial anode has a specific gravity of 2.77, and the component ratio is Fe: Si: Cu: Zn: In: Al = 0.1 wt%: 0.1 wt%: 0.01 wt%: 3.5 wt%: 0.03 wt%: 96.25 wt% Drainage pump for seawater. A cylindrical housing made of a metal with a motor, a head cover coupled to an upper side of the housing, a casing coupled to a lower side of the housing and a built-in impeller, a casing cover coupled to a lower side of the casing, and coupling the housing and the head cover. A first fastening member configured to couple the second fastening member to the housing, the casing and the casing cover, a fastening band of a metal material having one end and the other end connected to the first fastening member and the second fastening member, and the fastening member A seawater drainage pump having a sacrificial anode disposed through a band and an insulating member provided between the housing and the sacrificial anode, The sacrificial anode has a specific gravity of 2.77, and the component ratio thereof is Fe: Si: Cu: Zn: In: Mg: Ga: Al = 0.1 wt%: 0.1 wt%: 0.01 wt%: 3.5 wt%: 0.03 wt%: 1.5 wt% %: 0.02 weight%: 94.74 weight% The drainage pump for seawater characterized by the above-mentioned. A cylindrical housing made of a metal with a motor, a head cover coupled to an upper side of the housing, a casing coupled to a lower side of the housing and a built-in impeller, a casing cover coupled to a lower side of the casing, and coupling the housing and the head cover. A first fastening member configured to couple the second fastening member to the housing, the casing and the casing cover, a fastening band of a metal material having one end and the other end connected to the first fastening member and the second fastening member, and the fastening member A seawater drainage pump having a sacrificial anode disposed through a band and an insulating member provided between the housing and the sacrificial anode, The sacrificial anode has a specific gravity of 2.77, and the component ratio thereof is Fe: Si: Cu: Zn: In: Mg: Ga: Ca: Al = 0.1 wt%: 0.1 wt%: 0.01 wt%: 3.5 wt%: 0.03 wt%: 1.5% by weight: 0.02% by weight: 0.02% by weight: 94.72% by weight. The method according to any one of claims 2 to 4, The sacrificial anode is provided in the form of a rectangular parallelepiped, seawater drainage pump, characterized in that the through-pass through which the fastening band passes along the longitudinal direction. delete