CN214747413U

CN214747413U - Split type interface brazing plate heat exchanger

Info

Publication number: CN214747413U
Application number: CN202120346847.0U
Authority: CN
Inventors: 奚龙; 张举飞; 荣彬彬; 王锦虎
Original assignee: Jiangsu Baode Heat Exchanger Equipment Co ltd
Current assignee: Jiangsu Baode Heat Exchanger Equipment Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-16
Anticipated expiration: 2031-02-05

Abstract

The utility model relates to a split type interface brazed plate heat exchanger, including a plurality of heat transfer slab that each other range upon range of brazing together to and be located the front end plate and the back end plate of the heat transfer slab both sides after the brazing be provided with a plurality of split type interfaces on the front end plate, the angle hole intercommunication that split type interface and heat transfer slab correspond the position and set up to form medium heat transfer passageway with the ripple on heat transfer slab surface, split type interface includes the turn-ups interface of outwards forming after punching a hole by the front end plate to and deep-drawing fashioned takeover, turn-ups interface perpendicular to end plate surface, take over the cover outside the turn-ups interface to braze fixedly through the turn-ups copper sheet that sets up in the turn-ups interface outside. The utility model relates to a low in production cost, the product manufacturing qualification rate is high, simple process, the split type interface heat exchanger of product mechanical properties stability.

Description

Split type interface brazing plate heat exchanger

Technical Field

The utility model relates to a indirect heating equipment especially relates to a split type interface plate heat exchanger of brazing. Belongs to the technical field of energy-saving heat exchangers.

Background

The brazed plate heat exchanger has the advantage of lower cost, but the brazed plate heat exchanger for heating appliances and heating systems has more severe cost requirements. As shown in fig. 1, the number of the flow channel plates of the brazing heat exchanger generally selected is about 10, while the number of the joints is generally 4, and currently, machined joints are mostly adopted in the market, and a connecting pipe with a corresponding size is firstly machined on equipment, and then the connecting pipe is welded on an end plate after an expansion pipe. The interface adopting the mode wastes materials, is complex to process, causes the cost of the interface to be overhigh, and only 4 interfaces occupy more than 50 percent of the cost of the whole heat exchanger. In order to reduce the cost, a deep drawing interface form is also adopted in the market, but the actual effect is not ideal, the defects of low product qualification rate, complex process, unstable mechanical performance of the product and the like are overcome, and an interface structure with low production cost, high product manufacturing qualification rate, simple process and stable mechanical performance of the product is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a low-cost split type interface brazed plate heat exchanger is provided to above-mentioned prior art, can simplify the preparation technology, improve the product percent of pass.

The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides a split type interface brazed plate heat exchanger, includes a plurality of heat transfer slab that range upon range of each other and braze together to and be located the front end plate and the back end plate of the heat transfer slab both sides after the brazing be provided with a plurality of split type interfaces on the front end plate, the angular hole intercommunication that split type interface and heat transfer slab correspond the position and set up to ripple formation medium heat transfer passageway on heat transfer slab surface.

Preferably, the thickness of the front end plate and the rear end plate is 1mm-2 mm.

Preferably, the split type interface comprises a flanging interface formed by punching the front end plate and then forming the flanging interface outwards, and a connecting pipe formed by deep drawing, wherein the flanging interface is perpendicular to the surface of the end plate, and the connecting pipe is sleeved outside the flanging interface and is fixed by brazing through a flanging copper sheet arranged on the outer side of the flanging interface.

Preferably, the height of the flanging interface is 3mm-5 mm.

Preferably, the flanging interface and the front end plate are in fillet transition, the fillet radius is controlled within 0.3mm, and the angle is controlled between 90 degrees and 92 degrees.

Preferably, the flanging copper sheet is L-shaped and is attached to the outer side face of the flanging interface.

Preferably, the outer intersection of the end part of the flanging copper sheet, which is attached to the end plate, is 2.5mm-3mm larger than the outer diameter of the stretching interface, and the height of the flanging copper sheet is 3mm-4mm higher than that of the flanging interface.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses the machine tooling interface that adopts at present is with the structural improvement of expanded joint mode setting on the end plate for a low in production cost, the product manufacturing qualification rate is high, simple process, the split type structure of product mechanical properties stability, through the turn-ups interface that forms the take-over of take-over height on the end plate surface, then make through deep-drawing technology and take over, and will take over the welding on the turn-ups interface through the turn-ups copper sheet when the slab is brazed, improve through reasonable size design and take over welded intensity, and improve its impact resistance in the practical application process.

Drawings

Fig. 1 is a schematic structural diagram of a joint of a conventional brazed plate heat exchanger.

Fig. 2 is a schematic structural view of a brazed plate heat exchanger according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a front end plate in an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the connection pipe in the embodiment of the present invention.

Fig. 5 is a schematic structural view of a flanged copper sheet according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a split interface on a front end plate according to an embodiment of the present invention.

Fig. 7 is an enlarged schematic view at P in fig. 6.

Detailed Description

The present invention will be described in further detail with reference to examples.

Referring to fig. 1, the utility model relates to a split type interface brazed plate heat exchanger, including a plurality of heat transfer slab 1 that each other range upon range of brazing is in the same place to and be located the front end plate 1 and the back end plate 3 of the 1 both sides of heat transfer slab after the brazing be provided with a plurality of split type interfaces 4 on the front end plate 2, the angular hole intercommunication that split type interface 4 and heat transfer slab 1 correspond the position and set up to ripple with heat transfer slab 1 surface forms medium heat transfer passageway.

As shown in fig. 2-7, wherein: the end plate thickness t is preferably 1mm to 2mm, preferably 1mm, since the end plate thickness t is applied to the design pressure of the brazed plate heat exchanger for heating appliances and heating systems, which is usually not more than 10 bar. The application of end plates of 1mm thickness to this type of heat exchanger withstands a burst pressure of about 130 bar. Not less than 5 times greater than the burst pressure specified in the standard T/CECS 10008-2018.

The split type interface 4 comprises a flanging interface 4.1 formed by punching the front end plate 2 and then outwards forming the flanging interface and a connecting pipe 4.2 formed by deep drawing, wherein the flanging interface 4.1 is perpendicular to the surface of the end plate so as to be matched with a port of the connecting pipe 4.2, and the connecting pipe 4.2 is sleeved outside the flanging interface 4.1 and is fixed by brazing through a flanging copper sheet 4.3 arranged outside the flanging interface 4.1.

The height h of the flanging interface 4.1 is preferably 3mm-5mm, and preferably 4 mm. The welding strength and the sealing performance between the inner wall of the drawing interface and the outer wall of the flanging interface are unstable due to the undersize. The flange interface on the end plate is difficult to manufacture due to the fact that the flange interface is too large, and the qualification rate is reduced. And after exceeding 5mm, the welding strength has no practical significance.

The fillet transition is adopted between the flanging interface 4.1 and the front end plate 2, the fillet R needs to be controlled within 0.3mm, and the poor condition of a welding seam at the bottom of the interface is caused by the overlarge R value. Angle β of end plate flange: the welding angle needs to be controlled between 90 degrees and 92 degrees (according to the interface flanging height of 3mm to 5 mm), so that good welding can be realized.

The flanging copper sheet 4.3 is L-shaped and is attached to the outer side face of the flanging interface 4.1, the outer cross point B of the end part of the flanging copper sheet 4.3 attached to the end plate is larger than the outer diameter F2.5mm-3mm of the stretching interface, poor welding is easily formed between the bottom of the stretching interface and the end plate due to undersize, copper is easily remained on the surface of the end plate due to oversize, and the appearance of a product is affected. The height of the flanging copper sheet 4.3 needs to be higher than the height E of the flanging interface by 4.1: 3mm-4mm, can guarantee effectively that the copper will turn over the outer warp of the interface during welding, and the clearance between the inner diameter of the deep drawing interface is filled up. And will not fall into the heat exchanger.

In an actual blasting experiment, the heat exchanger body fails at 130bar, and the interface does not fail.

In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a split type interface brazed plate heat exchanger, includes a plurality of heat transfer slab (1) that each other range upon range of brazing together to and be located preceding end plate (2) and the back end plate (3) of heat transfer slab (1) both sides after the brazing, its characterized in that: the front end plate (2) is provided with a plurality of split type interfaces (4), the split type interfaces (4) are communicated with corner holes formed in the corresponding positions of the heat exchange plate sheets (1) and form medium heat exchange channels with the corrugations on the surfaces of the heat exchange plate sheets (1).

2. The split interface brazed plate heat exchanger of claim 1, wherein: the thicknesses of the front end plate (2) and the rear end plate (3) are selected to be 1mm-2 mm.

3. The split interface brazed plate heat exchanger of claim 1, wherein: split type interface (4) are including the turn-ups interface (4.1) of outwards forming after punching a hole by front end plate (2) to and deep-drawing fashioned takeover (4.2), turn-ups interface (4.1) perpendicular to end plate surface, takeover (4.2) cover is outside turn-ups interface (4.1) to through setting up in turn-ups copper sheet (4.3) brazing fixed in turn-ups interface (4.1) outside.

4. A split interface brazed plate heat exchanger according to claim 3, wherein: the height of the flanging interface (4.1) is 3mm-5 mm.

5. A split interface brazed plate heat exchanger according to claim 3, wherein: the flanging interface (4.1) and the front end plate (2) are in fillet transition, the fillet radius is controlled within 0.3mm, and the angle is controlled between 90 degrees and 92 degrees.

6. A split interface brazed plate heat exchanger according to claim 3, wherein: the flanging copper sheet (4.3) is L-shaped and is attached to the outer side face of the flanging interface (4.1).

7. The split interface brazed plate heat exchanger of claim 6, wherein: the outer intersection of the end part of the flanging copper sheet (4.3) attached to the end plate is larger than the outer diameter of the stretching interface by 2.5-3 mm, and the height of the flanging copper sheet (4.3) is 3-4 mm higher than that of the flanging interface (4.1).