Welded plate type heat exchanger core for nuclear power

Abstract

The utility model discloses a welded plate heat exchanger core for nuclear power, which comprises a plurality of groups of heat exchange plate pairs formed by welding two heat exchange plates in a back-to-back overlapping manner, the plurality of groups of heat exchange plate pairs are overlapped in the same direction, the outer edges of the peripheries of the heat exchange plate pairs are welded with the outer edges of connecting teeth of connecting toothed plates, the other sides of the connecting teeth are long strip-shaped connecting plates, and the connecting plates are connected with the connecting toothed plates. The two outer side edges of the connecting plate are clamped by the welding folded edges of the two stand columns of the same structure respectively and welded into a whole, the welding folded edges and stand column bodies of the stand columns are connected into a whole, every two adjacent stand column bodies are perpendicular to each other, and the top ends and the bottom ends of the stand columns are welded to the pressing plates respectively. The heat exchange plate pair is welded with the connecting teeth, the connecting plate is clamped and welded by the welding folded edges of the two stand columns, and an all-welding mode is adopted, so that the temperature resistance and the pressure resistance are enhanced, corrosion leakage is avoided, and the safety and the stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a welded plate heat exchanger core for nuclear power. Background Art

[0002] The intermediate heat exchanger is one of the key factors restricting the development of nuclear power. At present, there are two types of heat exchangers commonly used in nuclear power plants, gasket-type plate heat exchangers and shell and tube heat exchangers. The heat transfer elements of the gasket-type plate heat exchanger are heat exchange plates and gaskets, and the structure is compact. However, because the heat exchange plates and gaskets are sealed by clamping, and the temperature that the gasket material can withstand is relatively low, the heat exchanger's temperature and pressure resistance are poor; the heat transfer element of the shell and tube heat exchanger is a heat exchange tube, which is welded together to form a heat exchanger. It can withstand high temperature and high pressure, but the heat transfer efficiency is low and it occupies a large space. The above two heat exchangers no longer meet the needs of the miniaturization of nuclear power. Utility Model Content

[0003] The utility model aims to provide a core of a welded plate heat exchanger for nuclear power. The heat exchange plates, columns, pressure plates and connecting tooth plates are welded into a whole. The structure is compact and the heat exchange efficiency is high. The problems of poor temperature and pressure resistance and large space occupation of heat exchangers for nuclear power are solved.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A core of a welded plate heat exchanger for nuclear power comprises a plurality of heat exchange plate pairs formed by welding two heat exchange plates stacked back to back, wherein the plurality of heat exchange plate pairs are stacked in the same direction, the outer edges of the heat exchange plate pairs are welded to the outer edges of connecting teeth of a connecting tooth plate, the other side of the connecting teeth is a long strip-shaped connecting plate, the two outer sides of the connecting plate are respectively clamped and welded together by welding folded edges of two columns with the same structure, the welding folded edges are connected to the column body of the column as a whole, the two adjacent column bodies are perpendicular to each other, and the top and bottom ends of the column are respectively welded to a pressing plate.

[0006] Preferably, the connecting teeth and the connecting plate form an angle of 120°-140°.

[0007] Preferably, the shape of the outer edge of the connecting teeth is adapted to the shape of the space formed by the outer edges of two adjacent groups of heat exchange plate pairs.

[0008] Preferably, the outer edge of the column body is turned outward to form a sealing fold.

[0009] Preferably, the sealing fold is perpendicular to the column body.

[0010] Preferably, the four side edges of the pressing plate are turned upward to form an upper folding edge, and the upper folding edge is welded to the sealing folding edge.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] In the utility model, the heat exchange plate pair is welded to the connecting teeth, and the connecting plate is clamped and welded by the welding folding edges of two columns. A full welding method is adopted to enhance the temperature resistance and pressure resistance, avoid corrosion leakage, and improve safety and stability.

[0013] The heat transfer element in the utility model is a heat exchange plate, which has high heat transfer efficiency and compact structure.

[0014] As the most critical heat transfer element, the core of the welded plate heat exchanger for nuclear power has the characteristics of high temperature and high pressure resistance, high heat exchange efficiency and compact structure, making the welded plate heat exchanger for nuclear power the most ideal equipment to replace shell and tube heat exchangers and plate heat exchangers in some special heat exchange processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the connection structure between the heat exchange plate, the connecting tooth plate and the column;

[0017] Figure 3 It is a schematic diagram of the connection structure of the heat exchange plate and the heat exchange plate pair;

[0018] Figure 4 It is a structural schematic diagram of the pressure plate;

[0019] Figure 5 It is a structural schematic diagram of the connecting tooth plate;

[0020] Figure 6 It is a schematic diagram of the structure of the column;

[0021] In the figure: 1, pressure plate, 11, upper folding edge, 12, welding area, 2, connecting tooth plate, 21, connecting plate, 22, connecting teeth, 3, column, 31, sealing folding edge, 32, welding folding edge, 33, column body. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 6A core of a welded plate heat exchanger for nuclear power shown in the figure comprises an array of heat exchange plate pairs formed by stacking and welding two heat exchange plates 4 back to back, wherein the multiple groups of heat exchange plate pairs are stacked in the same direction, and the outer edges of the four sides of the heat exchange plate pairs are welded to the outer edges of the connecting teeth 22 of the connecting tooth plate 2, and the other side of the connecting teeth 22 is a long strip-shaped connecting plate 21, and the two outer sides of the connecting plate 21 are respectively clamped and welded together by welding folded edges 32 of two columns 3 with the same structure, and the welding folded edges 32 are connected to the column body 33 of the column 3 as a whole, and the two adjacent column bodies 33 are perpendicular to each other, and the top and bottom ends of the column 3 are respectively welded to the pressing plate 1.

[0024] The connecting teeth 22 and the connecting plate 21 form an angle of 135°.

[0025] The shape of the outer edge of the connecting teeth 22 is adapted to the shape of the space formed by the outer edges of two adjacent groups of heat exchange plate pairs.

[0026] The outer edge of the column body 33 is turned outward to form a sealing fold 31 .

[0027] The sealing fold 31 is perpendicular to the column body 33 .

[0028] The four side edges of the pressing plate 1 are turned upward to form an upper folding edge 11 , and the upper folding edge 11 is welded to the sealing folding edge 31 .

[0029] In the utility model, the heat exchange plate pair is welded to the connecting teeth, and the connecting plate is clamped and welded by the welding folding edges of two columns. A full welding method is adopted to enhance the temperature resistance and pressure resistance, avoid corrosion leakage, and improve safety and stability.

[0030] The above are only preferred examples of the present invention. It should be noted that for ordinary technicians in this field, under the technical enlightenment provided by the present invention, other equivalent deformations and improvements can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A welded plate heat exchanger core for nuclear power, characterized in that: It comprises an array of heat exchange plate pairs formed by stacking and welding two heat exchange plates (4) back to back, wherein the plurality of heat exchange plate pairs are stacked in the same direction, the outer edges of the four sides of the heat exchange plate pairs are welded to the outer edges of the connecting teeth (22) of the connecting tooth plate (2), the other side of the connecting teeth (22) is a long strip-shaped connecting plate (21), the two outer sides of the connecting plate (21) are respectively clamped and welded together by welding folded edges (32) of two columns (3) with the same structure, the welding folded edges (32) are connected to the column body (33) of the column (3) as a whole, the two adjacent column bodies (33) are perpendicular to each other, and the top and bottom ends of the column (3) are respectively welded to the pressing plate (1).

2. A welded plate heat exchanger core for nuclear power according to claim 1, characterized in that: The connecting teeth (22) and the connecting plate (21) form an angle of 120°-140°.

3. A welded plate heat exchanger core for nuclear power according to claim 1 or 2, characterized in that: The shape of the outer edge of the connecting teeth (22) is adapted to the shape of the space formed by the outer edges of two adjacent groups of heat exchange plate pairs.

4. A welded plate heat exchanger core for nuclear power according to claim 3, characterized in that: The outer edge of the column body (33) is turned outward to form a sealing folded edge (31).

5. A welded plate heat exchanger core for nuclear power according to claim 4, characterized in that: The sealing folded edge (31) is perpendicular to the column body (33).

6. A welded plate heat exchanger core for nuclear power according to claim 5, characterized in that: The four side edges of the pressing plate (1) are turned upward to form an upper folding edge (11), and the upper folding edge (11) is welded to the sealing folding edge (31).

Images