JPH027212Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an oil cooler equipped with a rust preventive device that can prevent corrosion of equipment in the cooling system of a vehicle engine.

(Prior Art) An oil cooler is installed on the engine and forms part of the engine's cooling system, and a widely used multi-plate type is shown in Figure 5.
Cooling water inlet pipe 1a and outlet pipe 1b are installed on the side wall.
Cooling desks d stacked in multiple stages are housed inside a cylindrical casing 1 having an annular dish-shaped upper plate 2, a lower plate 3, and a wavy fin interposed therebetween. 4, and each desk d has an oil inlet passage 6 on one side and an oil outlet passage 7 on the other side.
A center pipe 5 having a horizontal hole 5a at its upper end is inserted into the center in a protruding state, and an annular pipe 5 having a number of through holes 8a on an inward slope is inserted into the center of the casing 1. A groove-shaped top plate 8 is attached, and a bowl-shaped cover 9 is provided on the upper end of the center pipe, and the bottom of the casing 1 is fitted with oil filters lined up on brackets on the cylinder block, and the side inlets are Cooling water from the radiator is introduced into the casing 1 through the pipe 1a, while the inflow passage 6
Lubricating oil is flowed into each desk d through the desk d, allowing heat exchange between the two.

(Problems to be Solved by the Invention) The cover in the conventional oil cooler described above merely serves the role of an oil seal and a role of preventing intrusion of external dust.

By the way, there is a problem with the corrosion of equipment due to cooling water in engine cooling systems, but at present, large-scale models such as construction vehicles and bulldozers are
A multi-tube oil cooler with a structure similar to that seen in No. 54523 is used, and the cooling system is equipped with anti-corrosion equipment containing anti-corrosion agents, but in passenger cars and small trucks, it is difficult to use due to space and cost considerations. Currently, there is no special anti-corrosion equipment in the piping of the cooling system, and the current system relies solely on the use of antifreeze liquid (LLC) mixed with a rust preventive agent.

However, although the problems mentioned above do not occur as much in areas where antifreeze can be used, in areas where antifreeze is not used and the water quality is poor, such as Southeast Asia and the Middle East, problems such as corrosion of equipment due to cooling water may occur. In addition, recently in Japan, the use of aluminum parts has been promoted as a measure to reduce the weight of vehicles, and since aluminum parts are relatively sensitive to corrosion, aggressive rust prevention is required for these small models. I need the means.

Therefore, the purpose of this invention is to proactively prevent corrosion of the cooling system by using the existing oil cooler without installing special anti-corrosion equipment in the cooling system piping for small car models with limited space. The goal is to prevent this from happening.

(Means for Solving the Problems) Based on the above object, this invention has an annular upper plate, a lower plate and In an oil cooler in which a cooling desk consisting of wavy fins interposed between them is stacked in multiple stages, a center pipe for oil return is inserted into the center of the cooling desk in a protruding state, and a cover is removably attached to the protruding part of the pipe. The above-mentioned cover is formed into a box-shaped annular shape, and a solid rust preventive agent of a required size is housed inside the cover, and the above-mentioned cover is connected to the water guide part in the casing through an inlet pipe and an outlet pipe having inserts at the tips. It is characterized in that it is removably connected to a valve box that has cooling water holes provided at the front and rear, and valve bodies for opening and closing the holes.

(Function) When the engine is operating, oil flows into each desk from the bottom through the inflow passage, while cooling water flows into the casing from the inlet pipe, and the cooling water surrounds and flows around each desk, while the oil inside the desk flows. During this time, a portion of the cooling water flows into the cover through one valve box and the small diameter inlet pipe, dissolves a certain amount of the rust preventive agent in the cover, and cools it. Contain in water.

(Embodiment) FIGS. 1 and 2 show an embodiment of this invention, in which an inlet pipe 1a and an outlet pipe 1b are attached to one side wall of the casing 1, and an annular dish-shaped pipe is installed inside. Upper plate 2 and lower plate 3
Cooling desks d consisting of wavy fins 4 and wavy fins 4 interposed therebetween are stacked in multiple stages, and each desk d forms a downward oil inflow passage 6 on one side and an outflow passage 7 on the other side. A top plate 8 in the form of an annular groove with a number of through holes 8a on the inward slope is attached to the casing 1, and the top plate 8 passes through the laminated disk d and the top plate 8 to form an upper end portion. The structure is the same as the conventional one in that the center pipe 5 having a plurality of horizontal holes 5a is inserted through the center pipe 5, and the upper end thereof is covered with an oil seal cover.

By the way, in this invention, one half of the casing 1 is circular and the other half is square when viewed from above, and a water guide section 1c is formed inside, and the above-mentioned inlet pipe 1a and outlet pipe 1b are formed on the wall on the side of the water guide section 1c. The cover 9, which is fitted onto the protruding end of the center pipe 5, has an annular groove-shaped upper body 9.
A and a lower body 9b are formed into a box-shaped ring shape, and a donut-shaped solid rust preventive agent 10 such as nitrite, borate, nitrate, etc. is housed inside the ring, and an O-ring is mounted on the lower surface of the lower body 9b. 11 is attached, and the cover 9 is connected to the center pipe 5 through the inner brim.
It is placed on the top plate 8 via an O-ring 11 on the lower surface, and is detachably and watertightly attached to the casing 1 by a cap nut 12 screwed into the upper end of the pipe.

Furthermore, a small-diameter inlet pipe 13a and an outlet pipe 13b are attached to one side of the casing 1 in a pair in the front and back, and each pipe has a plurality of horizontal holes 14a at its lower end as shown in FIG. 3A. Plug 14
are provided on the lower surface of the upper wall of the casing 1, and an upper cylinder 15a and a bottom cover 15 are provided on the lower surface of the upper wall of the casing 1, respectively.
A valve box 15 consisting of a valve box 15 and a valve box 15 is vertically installed to protrude from the water guide portion 1c, and the bottom cover 15b has a plurality of horizontal holes 15c in the peripheral wall, and a plate valve 16 that is biased upward by a spring is arranged inside the bottom cover 15b. If the pipe insert 14 is not completely inserted or removed as shown in Figure A, the plate valve 16 rises and comes into pressure contact with the lower end of the transparent body 15a, closing the horizontal hole 15c and internally When the insertion of the insert 14 is completed to prevent liquid leakage, the plate valve 16 is lowered as shown in FIG.
5c are made to communicate with each other.

Thus, in a state in which the above-mentioned cover 9 is attached to the center pipe 5 and the front and rear inserts 14 are respectively fitted into the valve box 15 in the casing 1,
The casing 1 is mounted together with an oil filter on a bracket of a cylinder block, and cooling system piping is connected to the inlet pipe 1a and the outlet pipe 1b.

During operation of the engine, lubricating oil is taken into each desk d from the bottom of the casing 1 through the inflow passage 6, while cooling water from the radiator is taken into the casing 1 through the inlet pipe 1a, and oil is taken into each desk d. The cooled oil is cooled while passing through the corrugated fins 4 in d, rises up the outflow passage 7 on the opposite side, flows out onto the casing 1 through the through hole 8a of the top plate 8, and then flows through the side hole 5a.
It passes through the center pipe 5 and is supplied to the required location from there.

In addition, the cooling water that has flowed into the casing 1 passes through the water guide portion 1c, surrounds and cools each desk d, and flows out from the outlet pipe 1b to another location. 15 horizontal holes 1
5c and the horizontal hole 14a of the insert 14, and then flows into the cover 9 through the inlet pipe 13a, contacts the rust preventive agent 10 housed in the cover 9, and sequentially dissolves it, while the other outlet pipe 13b and It enters the casing 1 through the valve box 15, and flows out to another location from the outlet pipe 1b together with the water used for heat exchange.

In this way, when the solid rust preventive agent 10 loses its effectiveness after being used for a certain period of time (approximately 2 years), the cap nut 12 can be removed and replaced with a new cover 9 containing the rust preventive agent 10. Bye.

At that time, the through hole 15c of the valve box 15 is opened and closed by the plate valve 16 by attaching and detaching the insert 14.

In addition, FIGS. 4A and 4B show another embodiment, in which a shallow water reservoir 17 and a box-shaped annular cover 9 are fitted into the protrusion of the center pipe 5 in two layers, A small-diameter inlet pipe 13a and an outlet pipe 13b, which are watertightly and removably attached to the casing 1 with a cap nut 12 and connected to the front and rear valve boxes 15 in the casing 1, are connected to the water reservoir chamber 1.
7, and both pipes 1 are installed on the upper wall of the water reservoir chamber 17.
A through hole 17a is provided at an intermediate position between 3a and 13b, and the inside of the cover 9 is divided into a plurality of chambers 9 by a partition wall.
Each chamber 9c has a through hole 9 in its bottom wall.
d is provided, a solid rust preventive agent 10 having the same quantity and quality as the above rust preventive agent is accommodated inside each chamber 9c, and the through hole 9d of one chamber 9c is connected to the water reservoir chamber 17.
When in use, cooling water is first introduced into this one chamber 9c to dissolve the rust preventive agent 10 therein, and when the rust preventive agent 10 is no longer effective, the cap nut 12 is loosened. , by appropriately rotating the cover 9 to align the through hole 9d of the adjacent chamber 9c with the through hole 17a of the water reservoir chamber 17, and melting the rust preventive agent 10 inside, the life of use will be longer than in the above example. It's like this.

(Effects of the invention) As described above, in this invention, the cover of an oil cooler of the type in which cooling desks with wavy fins interposed between upper and lower annular plates are stacked in multiple stages is formed into a box-shaped annular shape, and the inside of the cover is contains a solid rust preventive agent of the required size, and when in use, a portion of the cooling water is guided into the cover through the inlet and outlet pipes, and the rust preventive agent is dissolved and circulated together with the cooling water. It is small and compact, making it suitable for use in vehicles with limited space for installation.The rust preventive agent dissolved in the cooling water travels with the cooling water to every corner of the intricate casing and cooling system. A passive film is formed on the surface of the casing to reliably protect the metal base, and when replacing the rust preventive cover, cooling water can be poured into the casing without having to empty it each time. It is convenient to be able to replace the equipment with a new one, so even in areas where antifreeze cannot be used as cooling water and the use of poor quality water is unavoidable, cooling system equipment can be easily replaced. It has the advantage of being able to effectively and appropriately prevent corrosion.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of one embodiment of this invention. Figure 2 is its plan view. Figure 3A is a cross-sectional view of the valve box and the plug before the connection is completed. Figure B is a sectional view of the same part after the connection is completed. FIG. 4A is a partially cutaway side view of another embodiment. Figure B is its plan view. FIG. 5 is a sectional view of a conventional oil cooler. In the figure, 1...casing, 1a...inlet pipe, 1b...outlet pipe, 1c...water guide section, 2...
...Top plate, 3...Lower plate, 4...Fin, 5...Center pipe, 8...Top plate, 9...Cover, 10...Rust preventive agent, 13a...
...Inlet pipe, 13b...Outlet pipe, 14...
Plug, 15...valve box, 16...plate valve, d...
desk.

Claims (1)

[Claims for Utility Model Registration] (1) Inside a cylindrical casing 1 having a cooling water inlet pipe 1a and an outlet pipe 1b on one side, an annular upper plate 2, an annular lower plate 3, and an annular lower plate 3 interposed therebetween. In an oil cooler in which cooling desks d consisting of wavy fins 4 are stacked in multiple stages, a center pipe 5 for oil return is inserted into the center of the cooling desks d in a protruding state, and a cover 9 is removably attached to the protruding part of the pipe 5. , the cover 9 is formed into a box-shaped annular shape, a solid rust preventive agent 10 of a required size is housed inside the cover 9, and the cover 9 is a small-diameter inlet pipe 13a having an insert 14 at the tip.
and cooling water passage holes 15c provided before and after the water guide portion 1c in the casing via the outlet pipe 13b.
An oil cooler with a rust prevention device that is detachably connected to a valve box 15 having an on-off valve body. (2) The box-shaped annular cover 9 has a plurality of chambers 9 inside.
Utility model registration claim No. Oil cooler with rust prevention device as described in section.