JPS6028691Y2 - Corrosion protection equipment - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an anti-corrosion device using anti-corrosion zinc.

2. Description of the Related Art Conventionally, a corrosion protection device is known in which anticorrosive zinc is attached to a cooling water chamber such as a jacket part of an internal combustion engine by using a flange or the like on an opening window provided in a chamber wall to perform corrosion protection electrochemically.

This type of corrosion protection device prevents corrosion of the protected object by eluting corrosion-protective zinc, which has an electrochemically lower potential than the iron materials and alloys that make up the protected object, into water. It is necessary to frequently check the degree of wear and tear on the anti-corrosion zinc.

However, in order to check the anti-corrosion zinc in the above-mentioned anti-corrosion device, it is necessary to drain the cooling water from the ice chamber, which takes time and effort.

For this reason, in recent years, a hole has been created that communicates with the inner end of the bolt for installations that are covered with anti-corrosion zinc, and the outer end of the bolt for installations that extend outside the ice chamber wall, to form a water inspection hole. Corrosion prevention devices are known, but in this type of corrosion prevention device, when the anticorrosion zinc wears out and the opening of the water inspection hole on the inner end side becomes immersed in the internal cooling water, the cooling water will be removed from the test water. Since water leaks to the outside through the holes, it is possible to detect from outside the wall that the anti-corrosion zinc is highly worn.

However, in such a corrosion protection device, if the above-mentioned water leakage check is neglected, there is a risk that a large amount of water in the water chamber will flow out from the water inspection hole.

This idea was made in order to eliminate the above-mentioned drawbacks.The opening of the water test hole on the outer surface of the ice chamber wall is covered with a cover, which prevents the water from being tested due to wear and tear on the anti-corrosion zinc. To provide a corrosion prevention device in which leakage of water from a hole is caught by a cover of a water receiver, whereby the leakage can be detected reliably, and a large amount of cooling water from an icebox is prevented from flowing out due to water leakage.

This invention will be explained below with reference to the drawings.

FIG. 1 shows a first embodiment of this invention, in which reference numeral 1 indicates an ice chamber wall in which a hole 1a is formed;
Screw holes 1b are provided around the outer opening of the ice chamber wall 1.

A cover 3 is attached to the opening, which is a cap-shaped water receptacle with a flange 3a formed on the periphery, through a flat lid plate 2 that covers the opening. The fixing bolts 4 are screwed into the screw holes 1b through the through holes 2b, 3b formed on the peripheral edge of the fixing bolts 4...
The flange 3a is attached to the cover plate 2 in close contact with it.

In addition, the mounting hole 2a drilled in the center of the lid plate 2 is provided with anti-corrosion zinc 6 fixed to the inner end 5a.
For installation with the outer surface of a closed, the bolts 5 are inserted through the anti-corrosion zinc 6 toward the inside of the water chamber 1c, and for installation with the water receiver on the outside of the cover plate 2 inside the cover 3, the bolts 5 are inserted. A nut 9 is screwed into the outer end portion 5b via a washer 8.

Note that a packing material 10 is interposed between the anticorrosive zinc 6 and the cover plate 2, and is wrapped around a bolt 5 for attachment.

For the above-mentioned installation, the bolt 5 is provided with an ice detection hole 11 which communicates with the outer surface of the inner end 5a at one end and the outer surface of the outer end 5b at the other end.

On the other hand, the water receiver has a detection hole 3c formed in the center of the cover 3 with a screw formed on the inner periphery, and the water receiver is inserted into the detection hole 3c from the outside of the cover 3 by a gasket such as a copper gasket. A drain plug 13 is screwed in through the material 12.

The drain plug 13 has a shaft hole 13a extending from the tip to the center of the drain plug 13 in the axial direction.
A horizontal hole 13c, which is open at both ends, is formed in the shaft hole 13a and the side surface of the drain plug 13 near the head 13b. Granted.

Note that a packing material 14 is interposed between the icebox wall 1 and the lid plate 2, and between the lid plate 2 and the water tray cover 3, respectively.

Further, a detection hole 15 is bored inside the anticorrosive zinc 6 adjacent to the opening of the water inspection hole 11 on the inner end 5a side.

To attach the anti-corrosion device configured as above to the icebox wall 1, attach the anti-corrosion zinc 6 to the lid plate 2 by connecting the bolts 5 to the lid plate 2.
The anti-corrosion zinc 6 is placed inside the water chamber wall 1, and the opening of the hole 1a is closed with the cover plate 2.Then, the water receiver is inserted into the cover plate 2 with the cover 3. Cover the water tray with bolts 4 to fix the cover 3 and lid plate 2 to the icebox wall 1.
Fixed by...

The corrosion protection device installed in this manner dissolves into water and prevents corrosion of the protected object in the same manner as conventional corrosion protection devices.

When the wear of the anticorrosive zinc 6 progresses and the detection hole 15 becomes immersed in cooling water, the cooling water leaks from the water detection hole 11 into the cover 3.

On the other hand, by rotating the drain plug 13, the opening of the horizontal hole 13c, which is normally blocked by the inner circumferential wall of the detection hole 3c, is opened to the outside of the cover 3. do.

Here, as described above, if water leaks into the cover 3, the water leaks out from the horizontal hole 3c, so it can be detected that the anticorrosive zinc 6 is highly worn.

Note that even if the water inspection hole 11 is blocked due to liquid leakage due to drain in the tank, etc., the water receiver can detect that the degree of wear of the anticorrosion zinc is high depending on the presence or absence of liquid in the cover 3.

In addition, the corrosion protection device with the above configuration rotates the drain plug 13 to check for liquid leakage. At this time, the watertightness of the ice chamber is maintained by the bolts 5 and the packing 10, so water cannot be poured into the ice chamber. It is possible to know the degree of wear of the anti-corrosion zinc 6 in this state.

In addition, when water leakage from the horizontal hole 13c is confirmed as described above, the anticorrosive zinc 6 is replaced as described below.

First, the water in the water chamber is drained, and then the fixing bolts 4 are removed from the water chamber wall 1, and the lid plate 2 is removed from the ice chamber wall 1, respectively.

Next, the nut 9 is removed from the bolt 5, another new anti-corrosion zinc (not shown) is fixed, and the bolt is attached to the cover plate 2 with a nut.

Then, the cover plate 2 and the water receiver cover 3 are attached to the water chamber wall 1 again with fixing bolts 4, and the replacement of the anticorrosive zinc is completed.

Further, in the above-mentioned replacement work, the lid plate 2 may be simply replaced with a lid body to which a new anti-corrosion zinc is attached, which is different from the lid plate 2.

FIG. 2 shows a second embodiment of this invention, and the same components as in FIG. 1 are given the same reference numerals, and their explanation will be omitted.

In the anti-corrosion device of this embodiment, anti-corrosion zinc 21 is attached to a cylindrical core material 20 in which a hole 20b is formed in a peripheral wall 20a. It is attached to the cover plate 2.

In the above installation, the inner end 5a of the bolt 5 has anti-corrosion zinc 21.
The opening of the water test hole 11 on the inner end 5a side of the bolt 5 communicates with the anti-corrosion zinc 21 via the hole 20b.

With the above configuration, in this embodiment, the anticorrosive zinc 21
When the drain hole 20b becomes immersed in water in the water chamber due to wear and tear, cooling water leaks from the water inspection hole 11.

Note that other operations and effects are the same as those in the previous embodiment, and the above-described structure and effects provide this embodiment with the same effects as in the first embodiment.

In the above embodiment, the detection hole 3C and the drain plug 13 screwed into the detection hole 3C constitute a water test means, and the cover 3 has a water test function. Another example of a water test means attached to the cover 3 is a water receptacle in which a part or the whole of the cover 3 is made of a transparent member such as acrylic resin.

In this case, the detection hole 3C and the drain plug 13 can be omitted.

Furthermore, the depth of the detection hole 15 in the first embodiment is increased, and the drilling position of the extraction hole 20b in the second embodiment is changed to
By placing the anticorrosive zinc 21 close to the surrounding area, it is possible to configure water to leak from the water inspection hole 11 at a time when the degree of wear of the anticorrosive zinc 21 is low.

In addition, by forming the detection hole 15 shallowly, omitting the detection hole 15, or making the hole 20b at the center of the core material 20, the anticorrosive zinc 2
It may also be configured such that water leaks from the detection hole 11 when the degree of wear and tear on the detection hole 11 is high.

As explained above, this idea is to install anti-corrosion zinc inside the water chamber by covering the opening on the outer surface of the tank wall in the water test hole of the bolt with a cover, and covering the water receiver with a water test means with a cover. Since the water receiver is designed to catch water leakage from the water inspection hole by the cover, by periodically inspecting the cover of the water receiver, it is possible to check for water leakage and detect a high degree of wear and tear on the anti-corrosion zinc. .

Therefore, the anti-corrosive zinc can be replaced before it is completely worn out.

In addition, by catching water leakage from the water inspection hole with the cover of the water receiver, the leakage water does not leak out of the cover of the water receiver, so that a large amount of water in the water chamber due to water leakage can be prevented.

Furthermore, even if the water inspection hole is blocked by drain or the like in the water chamber after a water leak occurs, the water receiver can detect that the anti-corrosion zinc is highly worn out based on the presence or absence of liquid in the cover.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of this invention, and FIG. 2 is a sectional view showing a second embodiment of this invention. 1...Water chamber wall, 3...Water receiver cover,
5...Mounting with bolts, 5a...Inner end, 6...Corrosion-proof zinc, 11...Water inspection hole,
21... Corrosion-preventing zinc.

Claims (1)

[Scope of utility model registration request] For installation, a bolt is passed through the ice chamber wall, and anti-corrosion zinc is provided in the water chamber, and for the above-mentioned installation, a water inspection hole is bored in the bolt, and the inner end of the hole is closed with the above-mentioned anti-corrosion zinc. A corrosion prevention device characterized in that a water receiver having a water test means attached to the outer surface of the ice chamber wall has a cover attached to cover the opening of the water test hole on the outer surface side of the ice chamber wall.