Plate heat exchanger plate pair

Abstract

The utility model discloses a plate heat exchanger plate pair, which relates to cold and hot medium heat exchange and comprises an upper plate and a lower plate, the upper plate and the lower plate are welded together through a plurality of welding spots, and a medium channel is arranged between the upper plate and the lower plate. Two medium inlets and outlets are formed in the surface of the upper plate piece, and connecting pipe fittings are welded to the positions of the medium inlets and outlets. According to the plate type heat exchanger plate disclosed by the utility model, middle laser welding or resistance spot welding technology welding and peripheral sealing welding are adopted, the plate pair is formed through pressure bulging, the surface is of a honeycomb structure, different shapes and sizes can be machined according to user requirements, and the requirements of high-temperature, high-pressure and corrosive medium environments can be met; the internal fluid forms high turbulent flow, and extremely high heat transfer efficiency is obtained.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold, heat medium heat exchange technical field, especially a kind of plate heat exchanger plate pair. BACKGROUND

[0002] Energy saving and environmental protection is our country a basic national policy, our country energy shortage, seriously restricts the economic and social development.Our country's economic and social development is much more dependent on energy than developed countries, and rational use of existing energy has become the top priority of measures to promote China's economic development.In the industrial production department, heat exchanger is widely used, especially in petrochemical enterprises, heat exchanger investment is as high as 30~40%.

[0003] Jacket type container has very wide application in petroleum chemical industry, pharmacy and food industry, jacket is the extra covering on the periphery of reaction kettle container or some parts of container, the annular space between container wall and jacket wall is used for the circulation of heating or cooling medium, however, with the increase of container volume and the increase of required heat exchange capacity, ordinary jacket container cannot meet its heat exchange requirement, in addition, with the increase of pressure in container jacket, the wall thickness of inner cylinder also needs to be increased when considering external pressure, causing the equipment structure to be heavy and the cost to be increased. UTILITARY MODEL

[0004] The utility model discloses a plate heat exchanger plate pair, which aims to solve the technical problem of heavy structure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A plate heat exchanger plate pair, comprising an upper plate piece and a lower plate piece, the upper plate piece and the lower plate piece are welded together by a plurality of welding points, a medium passage is arranged between the upper plate piece and the lower plate piece;

[0007] Two medium inlets and outlets are formed on the surface of the upper plate piece, and a connecting pipe fitting is welded at the position of the medium inlet and outlet;

[0008] A flange part is arranged at the upper end of the connecting pipe fitting, an edge cover part is arranged at the lower end edge of the connecting pipe fitting, the edge cover part is welded and fixed at the lower end of the medium inlet and outlet, a through cavity part is arranged between the edge cover part and the connecting pipe fitting, a through opening part is formed on the outer wall of the lower end of the connecting pipe fitting, the lower end of the connecting pipe fitting is welded and fixed to the lower plate piece, and the medium passage, the through cavity part and the through opening part are connected;

[0009] A sealing edge welding diameter is welded around the upper plate piece and the lower plate piece.

[0010] A flow-through welding diameter is misaligned welded along the edge of the sealing edge welding diameter.

[0011] In a preferred embodiment, the welding points are distributed in a rectangular lattice or a triangular lattice.

[0012] In a preferred embodiment, the medium channel is formed by hydraulic blow molding.

[0013] As can be seen, the plate pair of the plate heat exchanger has the following technical effects.

[0014] Firstly, the plate pair is welded by middle laser welding or resistance spot welding technology, and is peripherally sealed and welded, and is formed by pressure expansion, and has a honeycomb structure, and can be processed into different shapes and sizes according to user requirements, and can meet the high-temperature, high-pressure and corrosive medium environment, and the internal fluid forms a high turbulence, and a very high heat transfer efficiency is obtained.

[0015] Secondly, the flow-through welding diameter is misaligned and welded along the edge of the sealing welding diameter, and different positions of the flow-through welding diameter can be welded according to requirements, so that the flow direction of the medium in the medium channel can be controlled. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 The utility model provides a plate heat exchanger plate pair's upper plate piece structure schematic diagram.

[0017] Fig. 2 The utility model provides a plate heat exchanger plate pair's upper plate piece structure schematic diagram.

[0018] Fig. 3 The utility model provides a plate heat exchanger plate pair's upper plate piece structure schematic diagram.

[0019] In the drawings: 1, upper plate piece;2, lower plate piece;3, welding point;4, medium inlet and outlet;5, connecting pipe fitting;501, flange part;502, edge cover part;503, through cavity part;504, through mouth part;6, sealing welding diameter;7, flow-through welding diameter;8, medium channel. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments only are part of the embodiments of the utility model, rather than all the embodiments.

[0021] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0022] The utility model discloses a kind of plate heat exchanger plate pairs mainly apply to the scene of heavy structure.

[0023] Refer to Figs. 1-3 A plate heat exchanger plate pair, comprising upper sheet 1 and lower sheet 2, upper sheet 1 and lower sheet 2 are welded together by a plurality of welding points 3, medium passage 8 is provided between upper sheet 1 and lower sheet 2;

[0024] Two medium inlets and outlets 4 are provided on the surface of upper sheet 1, and connecting pipe fittings 5 are welded at the position of medium inlets and outlets 4;

[0025] Welding points 3 are distributed in a rectangular lattice or a triangular lattice;

[0026] Among them, heat exchange medium can be introduced from connecting pipe fittings 5, and circulated from medium passage 8, so as to exchange heat with the medium in the inner cylinder of the container, and medium passage 8 is formed by hydraulic blow molding, and forms a nest structure around welding points 3, so that the flow speed of fluid in the cavity is increased, and at the same time, the fluid collides with the nest position multiple times to form local small vortex, so that the medium flow in the cavity forms high turbulence, which destroys the original laminar flow layer and accelerates the heat exchange speed.

[0027] Further, the periphery of upper sheet 1 and lower sheet 2 is welded with edge sealing welding diameter 6, and the edge sealing welding diameter 6 is used for edge sealing, and upper sheet 1 and lower sheet 2 can be cut according to needs before edge sealing, so as to meet any required shape, and the adaptability is stronger.

[0028] Further, flow-through welding diameter 7 is misaligned welded along the edge of edge sealing welding diameter 6, and flow-through welding diameter 7 of different positions can be welded according to needs, so that the flow direction of medium in medium passage 8 can be controlled, such as Fig. 2 As shown in the figure, the medium flow path of the flow-through welding diameter 7 is shown by arrows.

[0029] As Fig. 3As shown, the upper end of the connecting pipe 5 is provided with a flange part 501, the lower end edge of the connecting pipe 5 is provided with a side cover part 502, the lower end of the side cover part 502 is welded and fixed with the medium inlet and outlet 4, a through cavity part 503 is arranged between the side cover part 502 and the connecting pipe 5, a through opening part 504 is arranged on the outer wall of the lower end of the connecting pipe 5, the lower end of the connecting pipe 5 is welded and fixed with the lower plate 2, the medium channel 8, the through cavity part 503 and the through opening part 504 are communicated;

[0030] The flange part 501 of the connecting pipe 5 is connected with the medium pipeline, the lower end of the connecting pipe 5 is welded and fixed with the lower plate 2, and the lower end of the side cover part 502 is welded and fixed with the medium inlet and outlet 4, so that the welding firmness is effectively improved, and at this time, the medium can flow through the medium channel 8, the through cavity part 503 and the through opening part 504.

[0031] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. The replacement can be the replacement of part of the structure, device, method step, or the complete technical solution. According to the technical solution and the inventive concept of the present application, equivalent replacement or change should be covered in the protection scope of the present application.

Claims

1. A plate heat exchanger plate pair, characterized in that Including upper plate piece (1) and lower plate piece (2), the upper plate piece (1) and lower plate piece (2) are welded together by several weld points (3), and the upper plate piece (1) and lower plate piece (2) are provided with medium passage (8); Two medium inlets and outlets (4) are formed on the surface of the upper plate piece (1), and a connecting pipe fitting (5) is welded at the position of the medium inlet and outlet (4); The upper end of the connecting pipe fitting (5) is provided with a flange part (501), the lower end edge of the connecting pipe fitting (5) is provided with a side cover part (502), the lower end of the side cover part (502) is welded and fixed with the medium inlet and outlet (4), a through cavity part (503) is arranged between the side cover part (502) and the connecting pipe fitting (5), a through opening part (504) is formed on the outer wall of the lower end of the connecting pipe fitting (5), the lower end of the connecting pipe fitting (5) is welded and fixed with the lower plate piece (2), the medium passage (8), the through cavity part (503) and the through opening part (504) are communicated; The upper plate piece (1) and the lower plate piece (2) are welded with edge sealing welds (6) around the periphery. Flowing welds (7) are misaligned welded along the edge of the edge sealing welds (6).

2. A plate pair of a plate heat exchanger according to claim 1, characterised in that The weld points (3) are distributed in a rectangular lattice or a triangular lattice.

3. A plate pair of a plate heat exchanger according to claim 1, characterized in that The medium passage (8) is formed by hydraulic blowing and molding.

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