ASSEMBLY TYPE OIL COOLER FOR INTENSIVELY COOLING HYDRAULIC MACHINERY

Abstract

An assembly type oil cooler has developed for intensively cooling the various kinds of hydraulic machineries. The oil cooler comprises a main body assembled with a plurality of the body units having a plurality of bolt-holes for assembling and water passages disposed circumferentially for cooling, a plurality of annular-sealing having arched sectors, an oil inlet and an oil outlet are installed at the front and rear of the body units, a pair of front and rear flange plates installed at both end-sides of the body units, a plurality of heat exchange pipes and supporting rods inserted to supporting rod engaging holes through supporting rod holes, a front flange-cap having two compartments to connect a cooling water inlet and an outlet and the body cooling water inlets, and a rear flange-cap having the body cooling water inlets arranged around the body unit for connecting the water passages of the rear flange plate.

Description

TECHNICAL FIELD

The present invention relates to a hydraulic-operating oil cooling apparatus for cooling hydraulic-operating oil used in various hydraulic machines using hydraulic pressure, and more particularly, to an assembly type hydraulic-operating oil cooling apparatus for a hydraulic machine, which is very convenient in maintenance and repair because a body of the oil cooling apparatus is constructed of several units, and is very excellent in cooling efficiency because cooling water flows through the inside of a heat exchange pipe of the hydraulic-operating oil cooling apparatus as well as the inside of the units.

BACKGROUND ART

In general, hydraulic machinery such as an injection molding apparatus or a press machine is provided with a cylinder for converting pressure energy into kinetic energy by using hydraulic-operating oil. When the cylinder is operated, heat is generated to thereby increase the temperature of the hydraulic-operating oil. As a result, there occur problems that the machinery is erroneously operated and working efficiency is reduced.

In order to solve such a problem, most hydraulic machine necessarily includes a hydraulic-operating oil cooling apparatus for cooling high-temperature hydraulic-operating oil and supplying it again to the hydraulic machine.

However, the hydraulic-operating oil cooling apparatus entails problems in that its assembly and maintain/repair are difficult because several heat exchange pipes are disposed at the inside of one body thereof.

DISCLOSURE OF INVENTION

Technical Problem

Accordingly, the present invention has been made to solve the above problems occurring in the prior art, and it is an object of the present invention to provide a hydraulic-operating oil cooling apparatus, which is excellent in cooling efficiency and is easy to maintain and repair, and wherein its mass production is easy due to a simple structure and its manufacture time can be drastically reduced because assembly of parts thereof is simple and easy.

Technical Solution

To achieve the above object, the present invention provides an assembly type hydraulic-operating oil cooling apparatus, wherein a desired number of units are bolt-engaged with each other in series to form a body of the hydraulic-operating oil cooling apparatus, each unit being formed with engaging holes and body cooling water passageways in the circumferential direction thereof, a packing is inserted into an intermediate portion of each unit in such a manner that projecting portions alternately confront each other, and an oil inlet and an oil outlet are formed respectively at the units engaged at both sides of the body, wherein cap clogging plates are engaged at both sides of the body, and heat exchange pipes and support rods are respectively inserted into heat exchange pipe engaging openings and support rod engaging holes, and the supporting rods are further inserted into support rod holes of clogging plates attached to the projecting portions of the packing, and wherein a cooling water inlet 4 and a cooling water outlet, which are separated from each other by a partition, are formed at one side of the cap clogging plate, which is engaged at both sides of the body, a front cap formed with cooling water body inlets in the radial direction is also engaged at one side of the cap clogging plate, and a rear cap formed with cooling water body inlets in the radial direction is engaged at the other side of the cap clogging plate, which is engaged at both sides of the body.

Advantageous Effects

Therefore, according to the present invention, the cooling efficiency is excellent because cooling water flows through the inside of the heat exchange pipe as well as inside of the body thereof, it is possible to easily disassemble and clean the hydraulic-operating oil cooling apparatus when impurities are concentrated at the inside of the hydraulic-operating oil cooling apparatus. In addition, the present invention is very useful because exchange of the damaged parts can be carried out after disassembling them without a necessity of changing the entire hydraulic-operating oil cooling apparatus, when the parts thereof are damaged, so that the hydraulic-operating oil cooling apparatus is easy and simple to maintain/repair and assemble, thereby resulting in a drastic reduction of the manufacturing cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a view showing a use state of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is an exploded perspective view of a rear cap of a hydraulic-operating oil cooling apparatus;

FIG. 4 is a view showing a state of a cap clogging plate to be engaged with a heat exchange pipe;

FIG. 5 is a partial cross-sectional perspective view of a unit;

FIG. 6 is an exploded perspective view of the clogging plate engaged at an intermediate portion of the unit;

FIG. 7 is a perspective view of other type of the clogging plate engaged at an intermediate portion of the unit;

FIG. 8 is a structural view of a front cap;

FIG. 9 is a structural view of a rear cap;

FIG. 10 is a cross-sectional view of the present invention;

FIG. 11 is an exploded perspective view of one embodiment of the present invention; and

FIG. 12 is an exploded perspective view of another embodiment of the present invention.

MODE FOR THE INVENTION

Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the appended drawings.

In the drawings, FIG. 1 is a view showing a use state of the present invention.

As shown in FIG. 1, a cooling water inlet 4 and a cooling water outlet 5 of a hydraulic-operating oil cooling apparatus 1 is connected to a cooling water tank 6 so that cooling water can circulate through the inside of a heat exchange pipe 20 disposed at the inside of the hydraulic-operating oil cooling apparatus 1, an oil inlet 2 and an oil outlet 3 of the hydraulic-operating oil cooling apparatus 1 are connected to a hydraulic machine so that hot hydraulic-operating oil can flow through the outer side of the heat exchange pipe 20 disposed at the inside of the hydraulic-operating oil cooling apparatus 1.

In this regard, heat exchange is produced between the hot hydraulic-operating oil, which is circulating from the hydraulic machine to the hydraulic-operating oil cooling apparatus 1, and the cooling water circulating from the cooling water tank 6 through the inside of the heat exchange pipe 20 disposed at the inside of the hydraulic-operating oil cooling apparatus 1, so that the hot hydraulic-operating oil is cooled and supplied again to the hydraulic machine.

FIG. 2 is a perspective view showing the hydraulic-operating oil cooling apparatus of the present invention.

As shown in FIG. 2, the hydraulic-operating oil cooling apparatus 1 of the present invention comprises several units 10 arranged in series, and two cap clogging plates 9, two rear caps 8 and two front caps 7 are respectively engaged at both ends of the respective unit 10. An oil inlet 2 and an oil outlet 3 are formed above the unit 10, which are engaged at both ends among the several units 10 forming the body of the hydraulic-operating oil cooling apparatus 1 after they are connected in series, and a cooling water inlet 4 and a cooling water outlet 5 are formed at the front cap 7.

FIG. 3 is an exploded perspective view showing a rear cap 8 and a cap clogging plate 9 of the hydraulic-operating oil cooling apparatus 1 of the present invention.

A rear cap 8 is engaged at one side of the body of the hydraulic-operating oil cooling apparatus 1, which is constructed by engaging several units 10 in series as shown in FIG. 2, and two cap clogging plates 9 are disposed at an intermediate portion of the rear cap 8 and the body constructed by engaging several units 10 as shown in FIG. 3, and a sealing 16 is inserted between the two cap clogging plates 9.

As shown in FIG. 3, a hole-shaped heat exchange pipe engaging opening 19 is formed at each cap clogging plate 9, and a sealing recess 17 is formed at one side of the cap clogging plate 9 by chamfering the heat exchange pipe engaging opening 19, as shown in FIG. 3. Then, a sealing member is mounted on a portion where the sealing recess 17 is machined at the heat exchange pipe engaging opening 19, i. e., at a portion where the heat exchange pipe engaging openings 19 formed at the two cap clogging plates 9 are formed when the two cap clogging plates 9 are engaged with each other.

The reason of inserting the sealing member 16 between the two cap clogging plates 9 is to prevent leakage of the hydraulic-operating oil, which flows through the inside of the unit 10, through a gap of the heat exchange pipe engaging opening 19 of the cap clogging plate 9.

In addition to the method as described above, the present invention can be carried out with using one cap clogging plate 9. In this regard, a heat exchange pipe 20 is inserted into a cap clogging plate 9 formed with a heat exchange pipe engaging opening 19, and the heat exchange pipe 20 is brought into contact with the heat exchange pipe engaging opening 19 of the cap clogging plate 9 by using a pipe enlarging device so that the leakage of the hydraulic-operating oil flowing through the inside of the unit 10 can be prevented.

Moreover, as shown in FIG. 3, the rear cap 8 engaged at one side of the hydraulic-operating oil cooling apparatus 1 constructed by engaging several units 10, and the front cap 7 engaged at the other side of the body are engaged with the body by means of the two cap clogging plates 9. In this instance, only one cap clogging plate 9 can be used as described above.

In the present embodiment, a plurality of heat exchange pipes 20 are installed at the inside of the body constructed by engaging several units 10, each of the heat exchange pipe 20 is securely inserted into the heat exchange pipe engaging opening 19 of the cap clogging plate 9 mounted at both sides of the body, as shown in FIG. 4. The heat exchange pipe 20 is formed with thread-shaped fins 21 at the outer surface thereof, as shown in FIG. 4. In this regard, when the heat exchange pipe 20 is inserted into the heat exchange pipe engaging opening 19 of the cap clogging plate 9, it is carried out in such a manner that the thread shaped fins 21 formed at the heat exchange pipe 20 overlap with each other.

In other words, the heat exchange pipe 20 is inserted into the heat exchange pipe engaging opening 19 of the cap clogging plate 20 in such a manner that the fins 21 formed at the outer surface of the heat exchange pipe 20 to be installed are disposed to be overlapped with the fins 21 of the heat exchange pipe 20, which has been already installed, as shown in FIG. 4. The thread-shaped fins 21 are inserted into the heat exchange pipe engaging openings 19 while being overlapped with the fins 21 of the other heat exchange pipe 20 when the heat exchange pipe 20 is rotated.

Thus, when the hydraulic-operating oil cooling apparatus is constructed in such a manner that fins 21 of the heat exchange pipe 20 are overlapped with each other, more heat exchange pipes 20 can be installed at the inside of the hydraulic-operating oil cooling apparatus 1 to thereby improve the cooling efficiency.

FIG. 5 is a partial perspective view of the unit 10 constituting the body of the hydraulic-operating oil cooling apparatus 1, when several units are engaged with each other.

As shown in FIG. 5, an engaging groove 14 is formed at one side of the unit 10, a projection 15 is formed at the other side and a cooling water passageway 18 and an engaging hole 13 are formed at the inside of the unit 20.

FIG. 6 is a perspective view showing a packing 23 inserted into an intermediate portion of the unit 10, when each unit 10 is engaged. As shown in FIG. 6, the packing 23 made of rubber material and formed in a donut shape, is formed with a projecting portion 31, an engaging hole 13 and a cooling water passageway 18. In addition, clogging plates 24, each of which is formed with a support rod hole 25, are engaged at both sides of the projecting portion 31 of the packing 23.

FIG. 7 shows another embodiment of a packing 23 inserted into an intermediate portion of the unit 10 when each unit 10 is engaged. As shown in FIG. 7, the packing 23 and the clogging plate 24 can be integrally constructed by inserting the clogging plate 24 into the projecting portion 31 of the packing 23.

FIG. 8 is a structural view of a front cap 7, and FIG. 9 is a structural view showing a rear cap 8.

As shown in FIG. 8, the front cap 7 is formed with a cooling water inlet 4 and a cooling water outlet 5, and a partition 26 is provided between the cooling water inlet 4 and the cooling water outlet 5 to separate the cooling water inlet 4 and the cooling water outlet 5. In addition, an engaging hole 13 and a cooling water body inlet 12 are formed alternatively at the front cap 7 and the rear cap 8. Hereinafter, the present invention as constructed above will be explained in detail.

FIG. 10 is a cross-sectional view of a hydraulic-operating oil cooling apparatus of the present invention, and FIG. 11 is an exploded perspective view of a hydraulic-operating oil cooling apparatus of the present invention.

As shown in FIG. 10 and FIG. 11, in the present embodiment of the invention, a body of the hydraulic-operating oil cooling apparatus 1 is formed by engaging several units 10 in series, and a packing 23 formed with a clogging plate 24 is inserted into an intermediate portion of the unit 10 when each unit 10 is engaged with each other, and an oil inlet 2 and an oil outlet 3 are formed at the unit engaged at both ends thereof.

In this instance, as shown in FIG. 10, the clogging plate 24 can be firmly secured at the inside of the body of the hydraulic-operating oil cooling apparatus 1 by constructing that the supporting rod groove 22 of the packing 23 and the supporting rod groove 22 of the clogging plate 24 should be inserted into the support rod 28, when the packing is inserted into an intermediate portion of the unit 10.

As described above, according to the hydraulic-operating oil cooling apparatus of the present invention, two cap clogging plates 9 are engaged at both ends of the body of the hydraulic-operating oil cooling apparatus, to which several units 10 are engaged in series, and a sealing member 16 is mounted on a sealing recess 17 formed at a heat exchange pipe engaging opening 19 of a cap clogging plate 9 to thereby prevent leakage of the hydraulic-operating oil in the body. The front cap 7 and the rear cap 8 are engaged at both sides of the body as constructed above. In addition, the unit 10 and the cap clogging plate 9 are firmly secured because concave engaging grooves 14 are formed at one side of each unit 10 and the cap clogging plate 9, and convex projections 15 are formed at the other side thereof.

The front cap 7 is formed with a cooling water inlet 4 and a cooling water outlet 5, which are separated from each other by a partition 26, and the rear cap 8 is formed with a circulation water chamber 11, and a cooling water body inlet 12 is formed at the front cap 7 and the rear cap 8 to communicate them to a body cooling water passageway 18.

When the hydraulic-operating oil of the hydraulic machine is introduced through the oil inlet 2, as shown in FIG. 10, the hydraulic-operating oil passes through the heat exchange pipe 20 in the zigzag direction due to the clogging plate 24 formed at the packing 23 and is discharged through the oil outlet 3 and supplied into again to the hydraulic machine. When the cooling water is supplied through the cooling water inlet 4 of the front cap 7, a portion of the cooling water passes through the inside of the heat exchange pipe 20 engaged with the cap clogging plate 9 and passes through the circulation water chamber 11 of the rear cap 8 and again through the heat exchange pipe 20 and is collected in a discharge water chamber 27 formed at the front cap 7 and discharged through the cooling water outlet 5.

As shown in FIG. 10, a portion of the cooling water supplied through the cooling water inlet 4 passes through the cooling water body inlet 12 of the front cap 7 and the body cooling water passageway 18 of each unit 10, which is connected to each other in series, resulting in the collection in the circulation water chamber 11 of the rear cap 8, and the cooling water collected in the circulation water chamber 11 passes through the cooling water body inlet 12 of the rear cap 8 and through the body cooling water passageway 18 of each unit 10, resulting in the collection in the discharge water chamber 27 of the front cap 7 and it is discharged through the cooling water outlet 5.

Thus, the hot hydraulic-operating oil passing through the inside of the heat exchange pipe 20 disposed at the inside of the body of the hydraulic-operating oil cooling apparatus 1 in the zigzag movement is cooled by the cooling water passing through the inside of the body of the unit 10 and the inside of the heat exchange pipe 20 by means of the processes as described above.

In this instance, as shown in FIG. 4, the heat exchange pipe 20 is formed with thread-shaped fins 21 at the outer surface of the heat exchange pipe 20, the cooling efficiency can be maximized by disposing more and more heat exchange pipes 20 at the inside of the body of the hydraulic-operating oil cooling apparatus 1 because each of the heat exchange pipe 20 is constructed in such a manner that fins thereof overlap with each other.

If the packing 23, which is formed integrally with the clogging plate 24 at the inside of the packing 23 as shown in FIG. 7, is engaged at an intermediate portion of the unit 10, the clogging plate 24 of the packing 23 can be firmly secured to the inside of the hydraulic-operating oil cooling apparatus 1 without the supporting rod 28 as shown in FIG. 10 and FIG. 11.

FIG. 12 is an exploded perspective view showing another embodiment of the present invention.

In the present embodiment, the hydraulic-operating oil cooling apparatus comprises a body 29 formed integrally with an oil inlet 2 and an oil outlet 3, and two supporting rods 28 provided with the clogging plates 24 by a predetermined interval, are inserted into a supporting rod engaging hole 30 and the heat exchange pipe engaging opening 19 of the cap clogging plates 9, which are engaged at both sides of the body 29, and disposed at the inside of the body 29. In addition, the hydraulic-operating oil cooling apparatus 1 is constructed by engaging the front cap 7 and the rear cap 8 at both the cap clogging plates 9 of the body 29.

In this instance, an end portion of the heat exchange pipe 20, which is inserted into the heat exchange pipe engaging opening 19 of the cap clogging plate 9, is constructed to prevent leakage of the hydraulic-operating oil passing through the periphery of the heat exchange pipe 20 by enlarging the pipe. In addition, as shown in FIG. 4, the hydraulic-operating oil passing through the periphery of the heat exchange pipe 20 can be prevented from leakage by using two cap clogging plates 9 and sealing members 16.

Consequently, the technical gist of the present invention can be summarized as follows.

According to one embodiment of the present invention, there is provided an assembly type hydraulic-operating oil cooling apparatus, wherein a desired number of units 10 are bolt-engaged with each other in series to form a body of the hydraulic-operating oil cooling apparatus, each unit being formed with engaging holes 13 and body cooling water passageways 18 in the circumferential direction thereof, a packing 23 is inserted into an intermediate portion of each unit 10 in such a manner that projecting portions 31 alternately confront each other, and an oil inlet 2 and an oil outlet 3 are respectively formed at units 10 engaged at both sides of the body.

In this embodiment, cap clogging plates 9 are engaged at both sides of the body, and heat exchange pipes 20 and support rods 28 are respectively inserted into heat exchange pipe engaging openings 19 and support rod engaging holes 30, and the supporting rods 28 are further inserted into support rod holes 25 of a clogging plate 24 attached to the projecting portions 31 of the packing 23.

In addition, in this embodiment, a cooling water inlet 4 and a cooling water outlet 5, which are separated from each other by a partition 26, are formed at one side of the cap clogging plate 9, which is engaged at both sides of the body, and a front cap 7 formed with cooling water body inlets 12 in the radial direction is also engaged at one side of the cap clogging plate, and a rear cap 8 formed with cooling water body inlets 12 in the radial direction is engaged at the other side of the cap clogging plate 9, which is engaged at both sides of the body.

Moreover, according to another embodiment of the present invention, there is provided an assembly type hydraulic-operating oil cooling apparatus, wherein a body 29 is formed with body cooling water passageways 18 in the circumferential direction at the inside thereof, an oil inlet 2 and an oil outlet 3 are respectively formed above the body 29, and cap clogging plates 9 are engaged at both sides of the body 29 in such a manner that heat exchange pipes 20 and support rods 28 are inserted respectively into heat exchange pipe engaging openings 19 and support rod engaging holes 30, and the support rods 28 are inserted into support rod holes 25 of clogging plates 24 in such a manner that the clogging plates 24 are fit around the support rods 28 so that they spaced apart from each other at a predetermined interval.

In this embodiment, a cooling water inlet 4 and a cooling water outlet 5, which are separated from each other by a partition 26, are formed at one side of the cap clogging plate 9, which is engaged at both sides of the body 29, and a front cap 7 formed with a cooling water body inlet 12 in the radial direction is also engaged, and a rear cap 8 formed with cooling water body inlets 12 in the radial direction is engaged at the other side of the cap clogging plate 9, which is engaged at both sides of the body 29.

Furthermore, according to still another embodiment of the present invention, there is provided an assembly type hydraulic-operating oil cooling apparatus, wherein a desired number of units 10 are bolt-engaged with each other in series to form a body of the hydraulic-operating oil cooling apparatus, each unit being formed with engaging holes 13 and body cooling water passageways 18 in the circumferential direction thereof, a packing 23 is inserted into an intermediate portion of each unit 10 so that projecting portions 31 of the packing 23, which is formed integrally with a clogging plate 24 at the inside, alternatively confront each other, and an oil inlet 2 and an oil outlet 3 are formed at the units 10 engaged at both sides of the body.

In this embodiment, cap clogging plates 9 are engaged at both sides of the body in such a manner that heat exchange pipes 20 are inserted into heat exchange pipe engaging openings 19 of the each cap clogging plate 9, a cooling water inlet 4 and a cooling water outlet 5, which are separated from each other by a partition 26, are formed at one side of the cap clogging plate 9, which is engaged at both sides of the body 29, and a front cap 7 formed with cooling water body inlets 12 in the radial direction is also engaged, and a rear cap 8 formed with cooling water body inlets 12 in the radial direction is engaged at the other side of the cap clogging plate 9, which is engaged at both sides of the body 29.

INDUSTRIAL APPLICABILITY

As described above, according to the present invention, cooling efficiency is excellent because the cooling water passes through the inside of the heat exchange pipe as well as inside of the body thereof.

It is possible to easily disassemble and clean the hydraulic-operating oil cooling apparatus when impurities are concentrated in the interior of the oil cooling apparatus.

In addition, the present invention is very useful because it is possible to exchange the damaged parts after disassembling them without a necessity of changing the entire hydraulic-operating oil cooling apparatus, when the parts thereof are damaged. As a result, it is easy and simple to maintain and repair the hydraulic-operating oil cooling apparatus, and easy to assemble it, resulting in the drastic reduction of the manufacturing cost.

Claims

1-5. (canceled)

6. An assembly type oil cooler for intensively cooling hydraulic machinery, the oil cooler comprising: a main body assembled a plurality of body units (10) being bolt-fastened in series, wherein each body unit (10) having a plurality of bolt-holes (13) for assembling and water passages (18) arranged circumferentially thereof for cooling the body units (10),a plurality of annular-sealing (23) alternately inserted between the body units (10), in such a manner that a plurality of arched sectors (31) are confronted each other,an oil inlet (2) and an oil outlet (3) installed at front and rear of the main body, respectively,a pair of front and rear flange plates (9) installed at both end-sides of the main body,a plurality of heat exchange pipes (20) inserted into heat exchange pipe engaging openings (19),a pair of supporting rods (28) inserted into supporting rod engaging holes (30) of the flange plates (9) through supporting rod holes (25) of clogging plates (24) and the annular-sealing (23) being formed the arched sectors (31), anda front flange-cap (7) attached to the front flange plate (9) to form two compartments being separated by a partition wall (26), said front flange-cap (7) having a cooling water inlet (4) and a cooling water outlet (5) for connecting to each compartment, and a plurality of body cooling water inlets (12) arranged around the body unit for connecting the water passages (18) of the front flange plate (9), anda rear flange-cap (8) attached to the rear flange plate (9) to form single compartment (11), and said rear flange-cap (8) having a plurality of the body cooling water inlets (12) arranged around the body unit (10) for connecting the water passages (18) of the rear flange plate (9).

7. The assembly type oil cooler according to claim 6, wherein said pair of front and rear flange plates (9) is consisted of double flanges, a plurality of sealing grooves (17) is formed around the heat exchange pipe engaging openings (19) between contacted surfaces of the double flanges of the front and rear flange plates (9), and a plurality of sealing rings (16) is mounted on each sealing groove (17).

8. The assembly type oil cooler according to claim 6, wherein said heat exchange pipes (20) have a plurality of fins (21) formed around outer surface thereof, said heat exchange pipes (20) are inserted and installed to the heat exchange pipe engaging opening (19) on both front and rear flange plates (9).

9. An assembly type oil cooler for intensively cooling hydraulic machinery, the oil cooler comprising: a main body forming a single cylindrical body unit (29) to have a plurality of water passages (18) arranged circumferentially thereof for cooling the body unit (29),an oil inlet (2) and an oil outlet (3) are installed at front and rear of the body unit (29), respectively,a front flange plate and a rear flange plate (9) installed at both end-sides of the body unit (29),a plurality of heat exchange pipes (20) inserted into heat exchange pipe engaging openings (19),a pair of supporting rods (28) inserted into supporting rod engaging holes (30) through supporting rod holes (25) of a plurality of clogging plates (24), wherein said clogging plates (24) arranged at predetermined intervals have formed arched sectors (31) for fixedly mounting the heat exchange pipes (20) and,a front flange-cap (7) attached to the front flange plate (9) to form two compartments being separated by a partition wall (26), said front flange-cap (7) having a cooling water inlet (4) and a cooling water outlet (5) for connecting to each compartment, and a plurality of body cooling water inlets (12) arranged around the body unit (10) for connecting the water passages (18) of the front flange plate (9), anda rear flange-cap (8) attached to the rear flange plate (9) to form single compartment (11) and said rear flange-cap (8) having a plurality of the body cooling water inlets (12) arranged around the body unit (10) for connecting the water passages (18) of the rear flange plate (9).

10. The assembly type oil cooler according to claim 9, wherein said front and rear flange plates (9) are consisted of single flange, a plurality of sealing grooves (17) is formed around the heat exchange pipe engaging openings (19), a plurality of sealing rings (16) is mounted on each sealing groove (17).

11. The assembly type oil cooler according to claim 9, wherein said heat exchange pipes (20) have a plurality of fins (21) formed around outer surface thereof, said heat exchange pipes (20) are inserted and installed to the heat exchange pipe engaging opening (19) on both front and rear flange plates (9).