JP2003014391A - Pipe type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent heat exchanging pipes from being worn and broken between the heat exchanging pipes and support guide plates due to the vibration of an engine in a pipe type heat exchanger, in which a plurality of heat exchanging pipes are traversed in a case and the heat exchanging pipes are supported by the support guide plates in the case to perform a heat exchange between fluid flowing in the heat exchanging pipes and fluid flowing in the case. SOLUTION: The support guide plate 16 is formed by laminating a plurality of plates as one set. A plurality of sets of support guide plates 16 are arranged and supported in the case 11 in a zigzag manner, and the respective sets of plates 16 are alternately pulled in opposite directions to fix the heat exchanging pipes 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for fixing a heat exchange pipe of a pipe type heat exchanger such as an engine cooler or an oil cooler.

[0002]

2. Description of the Related Art Conventionally, a pipe type heat exchanger has been known for cooling cooling water, hydraulic oil, air and the like of an internal combustion engine. As shown in FIG. 2, the pipe heat exchanger has a number of heat exchange pipes horizontally arranged between support plates on both sides,
By alternately arranging a plurality of support guide plates in a zigzag pattern between the support plates on both sides, the seawater is passed through the heat exchange pipe, and the fresh water is made to flow in a zigzag manner, thereby cooling the fresh water with the seawater. Was designed to cool the engine by pouring it into the water jacket of the cylinder block. As such a technique, there are techniques disclosed in JP-A-8-2101334 and JP-A-2000-18851.

In the above technique, a large number of heat exchange pipes are supported by support guide plates between support plates, and the ends of the heat exchange pipes are inserted into the support plates and fixed by caulking. The heat exchange pipe and the support guide plate are fixed by brazing or welding.

[0004]

However, since it is difficult to fix all of a large number of heat exchange pipes to the support guide plate by brazing or the like, they have been fixed by brazing at several places. On the other hand, an insertion hole is formed in the support guide plate for penetrating the heat exchange pipe, and a gap is provided between the insertion hole and the heat exchange pipe for easy penetration during assembly. When they are operated, their vibrations cause them to rub against each other, and holes may open in the heat exchange pipes at these frictional parts, and cooling water leaks from these holes, reducing cooling efficiency and damaging the cooling device. There were also times when.

[0005]

The present invention employs the following means in order to solve the above problems. First, in claim 1, a plurality of heat exchange pipes are laid horizontally in the case, the heat exchange pipes are supported by a support guide plate in the case, and the fluid passing through the heat exchange pipes and the inside of the case pass through. In a pipe heat exchanger for exchanging heat with a fluid to be supported, a plurality of sets of the support guide plates are stacked to form a set, and a plurality of sets of support guide plates are arranged in a zigzag manner to be supported. It was done.

Further, according to a second aspect of the present invention, each plate of each set is alternately pulled in opposite directions to fix the heat exchange pipe.

Further, in the third aspect, the pulling direction is parallel to the plate surface of the support guide plate.

Further, according to a fourth aspect of the present invention, the heat exchange pipes are fixed by pulling each plate of each set in a direction displaced by a predetermined angle.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an overall side view of an engine equipped with a pipe heat exchanger according to the present invention, FIG. 2 is a sectional view of the pipe heat exchanger, FIG. 3 is a view showing a support plate, and FIG. 4 is a support guide in FIG. A plan view of the board,
FIG. 5 is a view of the support guide plate in FIG. 2 as viewed in the direction of arrow B, FIG. 6 is an enlarged cross-sectional view of the support guide plate and the heat exchange pipe, and FIG. 7 is a view of FIG. It is (b).

First, the overall construction of an engine equipped with a pipe heat exchanger according to the present invention will be described with reference to FIG. In the engine 1, a crankshaft 3 is axially supported by a cylinder block 2 that houses a piston, a lower portion of the cylinder block 2 is covered with an oil pan 4, an upper portion is covered with a cylinder head, and a pipe heat exchanger 5 is provided above its side portion. Are arranged.

As shown in FIGS. 2 to 5, the pipe heat exchanger 5 has a cylindrical heat exchanger case 11, and side covers 12 and 1 for closing both sides of the heat exchanger case 11.
3, a plurality of heat exchange pipes 14, 14, ... Arranged in the heat exchanger case 11, and the heat exchange pipes 14, 14
It is comprised by the support plate 15 * 15 which supports both sides of ..., and the support guide plate 16 * 16 which supports an intermediate part.

A cooling water inlet 17 and a cooling water outlet 18 are provided on the outside of the side cover 13 on one side, and a horizontal separating wall 13 is provided at the center of the inside so as not to mix at the inlet and the outlet.
a is provided. The cooling water inlet 17 is connected to a cooling water pump via a hose or the like (not shown), and the cooling water pump sucks cooling water such as seawater to heat-exchange pipe 14.
・ I am able to send water to 14 ... The cooling water outlet 18 communicates with a hose or the like so that the cooling water after cooling can be discharged to the outside of the machine. The side cover 12 is provided with a space so that the cooling water flowing out from the heat exchange pipes 14 ...

Both ends of the heat exchange pipes 14, 14, ... Are supported by support plates 15, 15, and as shown in FIG. 3, a large number of supporting holes 15a, 15a ,.
Is opened so that one end of the heat exchange pipes 14 can be inserted. This heat exchange pipe 14
The end portion of is fixed by crimping at the support pipe 15. A notch 15b for positioning is provided on the outer periphery of the support plate 15, and in the present embodiment, the heat exchange pipe 14.1 supported on the upper half of the support plate 15 is provided.
4 ... are connected to the cooling water outlet 18, and the heat exchange pipes 14 supported on the lower half are connected to the cooling water inlet 17. However, it can be divided into left and right halves and is not limited.

The support guide plate 16 is shown in FIGS.
As shown in Fig. 2, a part of the disc is cut off and arranged vertically symmetrically, and as shown in Fig. 2, they are arranged alternately in the zigzag pattern in a zigzag pattern with a predetermined interval in the axial direction. The water is flowing. That is, the support guide plate 16 is slightly wider than approximately half (a semicircle) of a disc having a size matching the inner shape of the heat exchanger case 14, in other words, the disc is cut into a semicircular shape, The supporting holes 16a, 16a ... through which the heat exchange pipes 14, 14, ... Are penetrated on the plate are opened substantially in the same manner as the supporting holes 15a, 15a .. It is provided according to the position of the notch 15b.

Then, the support guide plates 16 are arranged in the heat exchanger case 14 in a direction perpendicular to the axial direction (longitudinal direction) so as to be vertically symmetrical at predetermined intervals, that is, as shown in FIG. Side view of the support guide plate 16 in a zigzag pattern
.. 16 are arranged, and the support guide plates 16, 16 ...
. And holes 16a for supporting the supporting plates 15 and 15
The heat exchange pipes 14, 14 ... Are inserted into and fixed to 15a.

A fresh water inlet 20 is provided at one end (lower right in this embodiment) of the heat exchange case 11 and communicates with the discharge port of the fresh water pump via a hose or the like, so that the heat exchange case 1
A fresh water outlet 21 is provided at the other end (upper left portion in the present embodiment) of No. 1 to communicate with a water jacket provided on the cylinder block 2 via a hose or the like to cool the engine, and the intake of the fresh water pump It is in communication with the side.
A temperature sensor is attached to the heat exchanger case 11 to detect the temperature of the cooling water and issue an alarm when the temperature becomes abnormal.

In such a structure, fresh water is discharged from the fresh water pump, and the heat exchanger case 1 is introduced from the fresh water inlet 20.
1, and guided by the support guide plates 16, 16 ..., the fresh water flows in a zigzag manner so that the flow path becomes long, and during this flow, the heat exchange pipes 14, 14, ... Heat is exchanged with the flowing seawater to cool the fresh water.

On the other hand, the seawater pumped up by the cooling water pump is sent to the cooling water inlet 17, and is sent from the cooling water inlet 17 to the heat exchange pipes 14, 14, ... In the lower half of the side cover 12. It reaches the space, further enters the heat exchange pipes 14, 14, ... In the upper half, reaches the cooling water outlet 18, and is discharged from the cooling water outlet 18. In this way, the heat exchange pipes 14 and 14 are arranged so as to reciprocate in the heat exchanger case 11.
The number of cooling water pipes 14, 14, ... Flowing through the inside of the pipe is large, the flow path is long, and the surface area is large, so that the cooling efficiency is increased.

Next, a structure for fixing the heat exchange pipes 14, 14, ... To the support guide plates 16, 16 ... Is the essential part of the present invention. The support guide plates 16 are attached to the heat exchanger case 11 as a set of two,
As shown in FIG. 6, the diameter D1 of the support hole 16a provided in each support guide plate 16 is equal to the diameter D of the heat exchange pipe 14.
It is configured to be larger than 2 so that the heat exchange pipe 14 can be easily inserted into the supporting hole 16a and assembled.

When fixing the heat exchange pipes 14, 14, ..., As shown in FIGS. 6 and 7, one of the left and right support guide plates 16 is pulled parallel to the plate surface in opposite directions, and two sheets are attached. The support guide plates 16 and 16 are fixed by brazing or the like. In this embodiment, the left side support guide plate 16L is moved upward, and the other right side support guide plate 16R is used.
The support guide plate 16 on the left side by pulling downward
The gap S between the L support hole 16a and the heat exchange pipe 14
Is located above, and the gap S between the support hole 16a of the right side support guide plate 16R and the heat exchange pipe 14 is located below, and the left and right support guide plates 16L and 16R form the heat exchange pipe 14. It will be fixed by sandwiching.

However, the left and right support guide plates 16L and 16R
The pulling direction is not limited to the vertical direction, but the opposite directions are the most preferable, and the pulling angles are different, such as the left and right directions and the diagonal reverse directions which are offset from each other by a predetermined angle. .. can be fixed at once. Further, the support guide plates 16 may be fixed as one set by stacking three or more plates instead of two sets, and in this case, the plates are alternately slanted in opposite directions or at predetermined angles. By pulling and fixing in the direction, the contact area with the heat exchange pipe 14 is increased, so that the heat exchange pipe 14 can be stably supported and the occurrence of vibration can be prevented. For example, in the case of three sheets, pulling in the radial direction shifted by 120 degrees, and in the case of four sheets pulling in the radial direction shifted by 90 degrees, vibration in all directions such as up, down, left and right The shake of the heat exchange pipe 14 can be prevented.

Then, each plate is fixed in a pulled state, but in order to facilitate positioning and the like, the outer diameter (D2) of the heat exchange pipe 14 and the diameter of the supporting hole 16a of the support guide plate 16 ( Difference of D1) (D3 = D1-D2)
Since it is almost fixed, the distance to pull (shift) (D
3) will be decided, so the heat exchange pipes 14 ・ 14 ・ ・
The center of the supporting holes 16a, 16a, ... Is aligned during insertion and assembly of, and the outer shape of the support guide plate 16 is aligned in the pulled state when it is fixed. For example, when pulling and fixing in the vertical direction,
When inserting and assembling the heat exchange pipes 14, 14, ..., the left and right support guide plates 16L, 16R are arranged vertically (D).
3) / 2 It has been staggered in the vertical direction, and the outer shape is also misaligned.
When they are fixed, they are offset from each other by (D3) / 2, so that their outer shapes match with each other, so that they can be easily positioned and easily fixed.

When fixing in this sandwiched state, the support guide plates 16L and 16R are fixed by means such as brazing or welding. Conventionally, since the heat exchange pipe 14 and the support guide plate 16 are fixed by brazing or the like, there are many brazing points and the fixing work is troublesome. However, in the present invention, since the support guide plates are fixed to each other, spot welding or the like can be performed, an arbitrary position can be fixed, the bonding work can be easily performed, and the number of bonding points can be reduced. Can be done.

[0024]

Since the present invention is configured as described above, it has the following effects. First, as in claim 1, a plurality of heat exchange pipes are horizontally installed in the case, the heat exchange pipes are supported by a support guide plate in the case, and the fluid passing through the heat exchange pipes and the inside of the case pass through. In a pipe heat exchanger for exchanging heat with a fluid to be supported, a plurality of sets of the support guide plates are stacked to form a set, and a plurality of sets of support guide plates are arranged in a zigzag manner to be supported. Because I did
The area of contact between each heat exchange pipe and each support guide plate increases, the support area increases, and a large number of heat exchange pipes can be stably supported, and vibration can be prevented.

Since the plates of each group are alternately pulled in opposite directions to fix the heat exchange pipes, the heat exchange pipes can be fixed with a simple structure, and the fixing work can be performed. It will be easy to do. Also,
By fixing a large number of heat exchange pipes at the same time, the vibration of the heat exchange pipes can be reduced against the vibration of the engine, and it is possible to prevent perforation caused by rubbing due to the vibration of the engine and to prevent damage to the heat exchanger. Can also contribute.

Since the pulling direction is parallel to the plate surface of the support guide plate, the heat exchange pipe can be securely fixed without damage and the fixing work can be easily performed.

Further, since the heat exchange pipes are fixed by pulling the plates of each set in a direction displaced by a predetermined angle as in claim 4, when the heat exchange pipes are fixed by a plurality of plates, the heat exchange pipes are It can be securely fixed even if it shakes in any direction. Further, by pulling and fixing the plate in accordance with the swing direction of the heat exchange pipe, it is possible to reliably limit the vibration of the heat exchange pipe.

[Brief description of drawings]

FIG. 1 is an overall side view of an engine equipped with a pipe heat exchanger according to the present invention.

FIG. 2 is a cross-sectional view of a pipe heat exchanger.

FIG. 3 is a view showing a support plate.

FIG. 4 is a view of the support guide plate in FIG.

5 is a view on arrow B of the support guide plate in FIG.

FIG. 6 is an enlarged cross-sectional view of a support guide plate and a heat exchange pipe.

7 is a view (a) in the X direction and a view (b) in the Y direction in FIG.

[Explanation of symbols]

1 engine 5 Pipe heat exchanger 11 heat exchanger case 14 heat exchange pipes 16 Support guide plate

Continued front page    F-term (reference) 3L103 AA11 AA27 BB16 CC02 CC03                       CC09 DD03 DD08 DD18 DD19                       DD42 DD62

Claims (4)

[Claims] 1. A plurality of heat exchange pipes are horizontally installed in a case, the heat exchange pipes are supported by a support guide plate in the case, and a fluid passing through the heat exchange pipes and a fluid passing through the case are provided. In a pipe type heat exchanger for exchanging heat between the support guide plates, a plurality of sets of the support guide plates are superposed as one set, and a plurality of sets of the support guide plates are arranged in a staggered manner and supported. Characteristic pipe heat exchanger. 2. The pipe heat exchanger according to claim 1, wherein the plates of each set are alternately pulled in opposite directions to fix the heat exchange pipe. 3. The pipe heat exchanger according to claim 2, wherein the pulling direction is parallel to the plate surface of the support guide plate. 4. The pipe heat exchanger according to claim 1, wherein the heat exchange pipes are fixed by pulling each plate of each set in a direction displaced by a predetermined angle.