KR20020025137A - Resisting pressure construction of board type heat exchange - Google Patents

Abstract

PURPOSE: A pressure-proof structure of plate type heat exchanger is provided to prevent crack on a welded part due to water pressure by reinforcing corners of a passage plate. CONSTITUTION: A pressure-proof structure includes a first duct(21); a second duct(22); and a reinforcing part(100). The first duct is diagonally formed on a second passage plate. The second duct is formed as a groove on a periphery of a penetrating hole of a first lower plate and placed on a lower side. The reinforcing part bends downward to be installed on peripheries of a first groove formed on the first lower plate with a closed lower part and a second groove with a closed lower part formed on a second lower plate under the penetrating hole.

Description

RESISTING PRESSURE CONSTRUCTION OF BOARD TYPE HEAT EXCHANGE}

The present invention relates to a plate heat exchanger, and more particularly, to a pressure-resistant structure of a plate heat exchanger for reinforcing to prevent the occurrence of cracks in the welded portion of the edge plate of the flow path plate by the water pressure of the direct and heating water.

Generally, the plate type heat exchanger 1 for a heating water boiler is disclosed variously. For example, as shown in FIG. 1 and FIG. 2, the "connecting structure of the heat exchanger" of Utility Model Registration No. 0160734 filed and registered by the present applicant is representative, and its configuration is as follows.

The upper plate 10 is provided on the upper side, a direct water inlet 11 and a heating water inlet 13 are formed at a rear side of the conduits formed in the upper corners, and the diagonal direction of the direct and heating water inlets 11 and 13 is formed. As a result, direct water and heating water outlets 12 and 14 are formed.

In addition, a plurality of first and second flow path plates 20 and 30 are stacked on the lower side of the upper plate 10 so as to cross each other, and the direct inlet 11, the direct outlet 12, and the heating water inlet are provided. (13), the first and second pipes 21 and 22 are formed in a diagonal direction to each other so that the fluids flowing through the heating water outlet 14 are not mixed with each other.

The first conduit 21 is a hole is formed in the upper side of the first, second flow path plate 20, 30, the second conduit 22 is a downward groove formed in the center hole.

In other words, the fluid passing through the first and second pipes 21 and 22 with the positions of the first and second pipes 21 and 22 staggered up and down, respectively, is formed to be alternately formed with the "V" -shaped flow path 23. The heat exchanger is not mixed with each other and causes mutual heat exchange, and the intersecting and intersecting portions of the flow path 23 are mounted by brazing welding.

In addition, a first lower plate 40 is provided below the second flow path plate 30, and a first recess 42 having a diagonally closed lower portion is formed below the first channel 21. The through hole 41 is formed diagonally in the lower side of the second conduit 22.

That is, the direct water is circulated in the first lower plate 40 by the first groove 42 and is discharged to the direct discharge port 12 of the upper plate 10 formed in a diagonal direction, and the first lower plate 40 Heating water flowing through the through-hole 41 formed in the circulation through the second lower plate 50 by the second recess 51, the lower portion is blocked, similar to the first groove 42, the heating water discharge port provided in a diagonal direction ( 14) is discharged to.

However, compared to the central portion in which the "V" -shaped flow path 23 is mounted, the first and second conduits 21 and 22 and the first and second recesses 41 and 51 are not mounted at the corners thereof, and thus are relatively unattached. 3, the first and second grooves 41 and 51, which are blocked at the lower part, are locally lowered by overwater pressure due to water hammering. There was a problem that a defect occurs in which a crack ("a" mark portion) occurs at the welded portion of the.

In addition, when the direct water and the heating water are mixed by the cracks as described above, there is a problem that the defects occur frequently and do not give the users confidence.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to reinforce the periphery of the first and second grooves that are subjected to water hammer or large hydraulic pressure to prevent cracking of the weld.

In addition, another object of the present invention is to provide users with confidence by preventing any defects in mixing water and heating water caused by the cracks without increasing the thickness of the heat exchanger plate for reinforcement.

1 is a perspective view showing the appearance of a conventional plate heat exchanger,

2 is an exploded perspective view for explaining the configuration of the plate heat exchanger,

3 is a cross-sectional view taken along the line “A”-“A” of FIG. 2,

4 is a plan view for explaining the reinforcement of the present invention,

5 is a cross-sectional view taken along the line “B”-“B” of FIG. 4,

6 is a view illustrating another embodiment of the present invention, which is a detailed perspective view partially illustrated for explaining a protrusion for dispersing hydraulic pressure,

FIG. 7 is a cross-sectional view taken along the line “C”-“C” of FIG. 6.

* Explanation of symbols for the main parts of the drawings

1; plate heat exchanger 10; top plate

20,30; first and second euro plates 40,50; first and second bottom plates

100; reinforcement 200; protrusion

According to the present invention, a straight water inlet and a heating water inlet are formed at a rear side of a pipe formed in the upper corner, and the upper plate is formed in a direction perpendicular to each of the direct and heating water inlets, and a heating water outlet is stacked, and a plurality of the upper plates are stacked below the upper plate. The first and second pipes are formed in a diagonal direction so that the fluid flowing through the direct inlet, the direct outlet, the heating water inlet, and the heating water outlet are not mixed with each other, and the upper surface is alternately formed with a "V" -shaped flow path. Through holes are formed in the lower side of the first and second flow path plates, in which the intersecting portions of the "V" -shaped flow path are mounted by brazing welding, and the first pipe path formed diagonally on the second flow path plate, and the lower side of the second pipe path. A first lower plate having a first recess formed in a lower portion diagonally on the first lower plate, and a lower lower second recess formed in a lower portion of the through hole. 1 that relates to a plate heat exchanger consisting of a second lower plate portion is formed to be mounted to mounting interview and the lower plane of the groove, and more particularly to a pressure-resistant structure to the reinforcing parts of the multiple layered edges.

The present invention is a reinforcement downward to be mounted on the outer periphery of the second conduit and the first and second grooves provided in the lower side formed as a groove on the outer periphery of the through hole of the first channel and the first lower plate formed diagonally on the second channel plate It is configured to include a wealth.

In addition, in the present invention, the first and second recesses formed in the first and second lower plates in a diagonal direction protrude while forming an inclined upwardly toward the center portion, so that the first and second lower plates are flushed back to the same level as the plane level of the first and second lower plates. It is characterized in that it further comprises a protrusion forming.

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

Figure 4 is a plan view for explaining the reinforcement of the present invention, Figure 5 is a cross-sectional view of the line "B"-"B" of Figure 4, Figure 6 shows another embodiment of the present invention, It is a detailed perspective view partially shown for demonstrating the protrusion, and FIG. 7 is a sectional view of the line “C”-“C” in FIG. 6. (Hereinafter, the same configurations as in the prior art will be described with the same names and symbols.)

The present invention for achieving the above object, as shown in Figures 4 and 5, for the reinforcement of the four corner portion that the interview portion (b) of the intersecting flow path 23 is weaker than the center portion mounted by the conventional brazing welding The reinforcement part 100 is formed on the outer circumference of the first pipe line 21 formed diagonally at the edge shown to reinforce the edge part of the plate heat exchanger 1. (The reinforcement part 100 is the first, 2 is formed in both the first pipe passage 21 of the flow path plate 20, 30 and the through hole 41 of the first lower plate 40, it will be described with reference to the first flow path plate 20 in FIG. .)

The reinforcement part 100 is formed in a circular arc in the outer direction of the first pipe line 21 in a planar shape, inclined inward toward the lower side in the cross section, and embossing in the form of a recess formed in a plane from the lower side again. Will be.

That is, the cross section and the height of the flow path 23 are the same in cross section so as to be easily interviewed on the outer circumference of the second pipe line 22 and the first and second grooves 41 and 51 provided on the lower side. .

The interview portion is mounted by brazing welding similarly to the interview portion of the "V" -shaped flow path 23 provided with mutually staggered.

In addition, the reinforcement 100 is a manufacturing technology of the art, it can be easily modified and implemented as much as possible. For example, as described above, a plurality of embossings are formed in a circular arc shape in addition to the form of a circular arc to form a plurality of reinforcement parts 100.

As shown in Fig. 5, the corners of each flow path plate are mounted so that the pressure resistance corresponding to the pressure concentrated at the corners of the plate heat exchanger 1 due to overhydration caused by the water hammer phenomenon. ) Is an improvement.

6 and 7 show another embodiment of the present invention, which shows another method of reinforcing to prevent cracks in the surrounding welds when the overwater pressure is applied. It is not formed in the second conduit 22 of the plates 20 and 30, but is formed only in the first and second recesses 41 and 51 of the first and second lower plates 40 and 50. The second lower plate 50 is shown.)

As shown, the bottom surface is blocked, so that the bottom surface of the first and second grooves 41 and 51 alternately formed on the first and second lower plates 40 and 50 where the input of heating water or direct water is finished. The protrusion 200 is formed so as to form a slope that is collected toward the center portion again to form a plane on the upper side.

The protrusion 200 is formed at the same level as the planar level of the first and second lower plates 40 and 50, and the protrusion 200 is not mounted with other components, and when the above water pressure is applied, By dispersing the pressure, the pressure applied to the first and second grooves 41 and 51 is reduced.

As shown in FIG. 7, the first groove 41 distributes the water pressure from the upper side to the lower side to both sides by the protrusion 200, thereby greatly reducing the pressure, thereby reducing the pressure around the welded area around the edge. To prevent cracking.

In addition, the frictional resistance is reduced, and the flow rate is increased to smoothly flow the direct water or the heating water flowing through the flow path 23 by the pressure dispersion of the protrusion 200.

Although the reinforcement part 100 and the protrusion part 200 have been described, the reinforcement part 100 and the protrusion part 200 may include the reinforcement part according to the site where the plate heat exchanger 1 in which the reinforcement structure of the present invention is formed is installed. 100), only one of the protrusions 200 may be formed, and both the reinforcement part 100 and the protrusion 200 may be formed.

As described above, since the life span of the plate heat exchanger 1 is extended by a simple reinforcement structure corresponding to overwater pressure and no defect occurs, there is also an effect that has been well received by users.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Such changes will fall within the scope of the claims.

As described above, according to the present invention, water hammering or large water reinforcement is performed by reinforcing the corner portions in which the first and second conduits and the first and second grooves are relatively weak compared to the center portion in which the "V" -shaped flow path is mounted. It prevents cracks in the peripheral welds due to hydraulic pressure, which has the effect of giving confidence to users.

Claims (2)

The top plate formed with a direct water inlet and a heating water inlet at a rear side of the conduit formed in the upper corner, and the top plate having a straight line and a heating water outlet in each of the direct water and the heating water inlet in a diagonal direction, and a plurality of stacked on the lower side of the upper plate. The first and second pipes are formed diagonally to each other so that the fluid flowing through the direct water inlet, the direct water outlet, the heating water inlet, and the heating water outlet is not diagonally mixed with each other, and the “V” -shaped flow paths are alternately formed on the upper surface thereof. Through holes are formed in the lower side of the first and second flow path plates in which the V ″ -shaped flow path is mounted by brazing welding, and the first pipe path formed diagonally in the second flow path plate. A first lower plate having a first recess formed in which the lower portion is blocked, and a second recess formed in the lower portion of the first lower plate, and having a lower portion of the first hole formed in the lower portion of the through hole. In groups and side flat plate heat exchanger consisting of a second lower panel mounting portion is formed to be mounted to an interview, Including a reinforcement portion formed downward in the outer periphery of the first conduit formed in the second passage plate and the outer periphery of the through hole of the first lower plate and the through hole of the first lower plate and the second conduit provided on the lower side Pressure resistant structure of a plate heat exchanger, characterized in that configured. The method of claim 1, The first and second recesses formed on the first and second lower plates in a diagonal direction may further include protrusions protruding in an upward direction toward a central portion to form a plane again at the same level as the plane level of the first and second lower plates. Pressure resistant structure of a plate heat exchanger, characterized in that configured by.