CN116160207A - Processing method of gas-gas heat exchange device - Google Patents

Abstract

The invention relates to the technical field of heat exchange devices, and particularly discloses a processing method of a gas-gas heat exchange device. The processing method is characterized in that the thin metal plate is bent to form an inner plate similar to a channel steel structure. After passing through a plurality of inner plates in a certain arrangement sequence, the positioning rods clamp and fix the inner plates through the side plates. After the positions of the side plates and all the inner plates are relatively fixed, welding is carried out on the gaps where the inner plates are abutted and the abutting gaps between the inner plates and the side plates, so that the processing of the air heat exchange device is more convenient.

Description

Processing method of gas-gas heat exchange device

Technical Field

The invention relates to the technical field of heat exchange devices, in particular to a processing method of a gas-gas heat exchange device.

Background

A heat exchanger is a device that transfers a portion of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. The heat exchanger plays an important role in chemical industry, petroleum, power, food and other industrial production, and can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like in the chemical industry, so that the heat exchanger has wide application range.

The arrangement mode of the cold and hot runners in a horizontal and vertical arrangement mode is widely used in gas-gas heat exchangers, and a heat exchanger with the cold and hot runners in a horizontal and vertical arrangement mode is disclosed in an application document with a patent number of CN 217483315U. However, the heat exchange structure part of the heat exchanger is an integrated structure, and when the number of the cold and hot runners is large, the processing of the heat exchange structure is very complicated.

Accordingly, the prior art is still in need of improvement and development.

Disclosure of Invention

The invention discloses a processing method of a gas-gas heat exchange device, which is used for solving the problem of complicated processing of the gas-gas heat exchange device.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the processing method of the gas-gas heat exchange device comprises the following steps:

s1: taking a rectangular thin metal plate, bending edges of two opposite sides of the metal plate towards the middle of the metal plate to obtain inner plates, and repeating the bending to obtain a plurality of inner plates;

s2: fixing a positioning rod on the side plate, and abutting the bending part on the side plate after the positioning rod passes through one inner plate;

s3: after one inner plate is turned by n x 90 degrees (n is an odd number), the positioning rod passes through the inner plate, so that the bending part is abutted against the upper inner plate;

s4: repeating the steps S2 and S3 until a sufficient amount of inner plates are arranged on the positioning rod;

s5: passing the locating rod through another side plate so that the side plate abuts against the inner plate, and then fastening the side plate on the inner plate;

s6: and welding the abutting surfaces of the inner plates and the side plates.

Preferably, the inner plate is provided with at least two.

Preferably, the inner panel includes a main body and a bent portion including a first portion perpendicular to the main body and a second portion perpendicular to the first portion and parallel to the main body.

Preferably, the bending part further comprises a third portion, the third portion is perpendicular to the main body, the third portion abuts against the first portion, and the third portion abuts against the second portion.

Preferably, the welding is pulse welding.

Preferably, the step S1 further includes stamping a plurality of convex hulls for homogenizing wind on the inner plate.

Preferably, the convex hull arrays are distributed.

Preferably, a spacer is disposed between adjacent inner plates.

Preferably, a plurality of gaskets are provided, and a plurality of gaskets are penetrated by the positioning rod.

Compared with the prior art, the invention has the beneficial effects that:

according to the processing method of the gas-gas heat exchange device, the same inner plate is used for forming different adjacent gas flow passages, so that the processing of the gas-gas heat exchange device is simpler. Not only the processing efficiency of the heat exchange device is improved, but also the heat exchange efficiency of the gas heat exchange device is improved.

Drawings

FIG. 1 is a step diagram of a method for processing an inner plate according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an inner panel according to an embodiment of the present invention;

FIG. 3 is a schematic view of an inner plate according to an embodiment of the present invention

FIG. 4 is a schematic view of an abutting structure of two inner plates according to an embodiment of the present invention;

FIG. 5 is a schematic view of an abutting structure of two inner plates according to an embodiment of the present invention;

FIG. 6 is a schematic view of a structure of three inner plates abutting against each other according to an embodiment of the present invention;

FIG. 7 is a schematic view of a structure of three inner plates abutting against each other according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a gas-gas heat exchange device according to an embodiment of the present invention;

fig. 9 is an installation schematic diagram of a gas-gas heat exchange device according to an embodiment of the invention.

Description of main reference numerals: 10-inner plate, 11-main body, 111-convex hull, 12-kink, 121-first part, 122-second part, 123-third part, 20-curb plate, 30-locating rod, 40-nut, 50-gasket, 60-gas flow channel.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The technical scheme of the invention will be further described with reference to the examples and the accompanying drawings.

Examples

Heat exchangers are widely used in various fields as common heat exchange devices. A gas-to-gas heat exchange device is disclosed in the application document CN217483315, which, as disclosed in the specification, is formed by welding a series of metal sheets in a stacked manner.

The direct welding of the metal plates without bending generally comprises two modes, namely, the heat exchange device is welded into a rectangle through the straight metal plates, and the welding is continued on the basis of the initial rectangle, so that the heat exchange device forms flow channels which are arranged at intervals.

And secondly, cutting off one surface of the rectangular pipe to enable the rectangular pipe to be changed into a groove-shaped plate, and then welding a plurality of cut rectangular pipes (groove-shaped plates) together to form the heat exchange device with the flow channels arranged at intervals.

The channel steel is not suitable for being used as a raw material for processing the heat exchange device because of the excessively thick structure of the channel steel.

However, in actual production, if a straight metal plate is used for direct welding, the welding workload will be very large. Or when a sufficient amount of rectangular tubular material is purchased for cutting, the cutting amount of the tubular material is similarly large.

Thus, a method of manufacturing a gas-gas heat exchanger is disclosed herein, in which a thin metal plate is bent so that the thin metal plate becomes an inner plate 10 having a structure similar to a channel steel. After the positioning rods 30 penetrate through a plurality of inner plates 10 in a certain arrangement sequence, the inner plates 10 are clamped and fixed through the side plates 20. After the positions of the side plates 20 and all the inner plates 10 are relatively fixed, the abutting gaps of the inner plates 10 and the side plates 20 are welded, so that the air heat exchange device is more convenient to process.

Specifically, referring to fig. 1 and 9, the processing method of the gas-gas heat exchange device provided by the invention includes:

s1: and taking a rectangular thin metal plate, bending the edges of two opposite sides of the metal plate towards the middle of the metal plate to obtain an inner plate 10, and repeating the bending to obtain a plurality of inner plates 10. The rectangular metal plate is made of common sheet metal material, and is thinner, so that heat exchange of gas of adjacent air passages can be simpler. After bending the metal plate, a "" shaped metal plate, i.e., the inner plate 10, is obtained.

S2: the positioning rod 30 is fixed on the side plate 20, and after the positioning rod 30 passes through one of the inner plates 10, the bending part 12 is abutted on the side plate 20.

There are several ways of fixing the positioning rod 30 to the side plate 20, such as welding, screwing, or other fixing ways, and the main purpose is to fix the positioning rod 30 relatively, so as to facilitate the positioning rod 30 passing through the inner plate 10.

The side plate 20 is a metal plate provided beside the inner plate 10, and the side plate 20 may be a thick-wall metal plate or a thin-wall metal plate. Preferably, in one embodiment of the present invention, the side plate 20 is made of thin-walled metal plate in order to reduce the overall weight of the gas heat exchange device.

S3: after one of the inner plates 10 is turned n×90 ° (n is an odd number), the positioning rod 30 passes through the inner plate 10, so that the bent portion 12 abuts against the previous one of the inner plates 10.

In S2, the first "" shaped inner panel 10 is placed, and the first "" shaped inner panel 10 is used as a reference. The first placed "" shaped inner plate 10 in S3 should be rotated 90n degrees (n is an odd number) with respect to the first "" shaped inner plate 10 in S2, i.e., rotated 90 degrees, 270 degrees, 450 degrees, etc. with respect to each other. So that the bent portion of the block inner panel 10 is perpendicular to the bent portion of the inner panel 10 in S2.

In order to enable the positioning rod 30 to smoothly pass through the inner plate 10, a through hole matched with the positioning rod 30 is arranged on the inner plate 10, and the aperture of the through hole is slightly larger than the rod diameter of the positioning rod 30, so that the positioning rod 30 can smoothly pass through.

S4: s2 and S3 are repeated until a sufficient number of inner plates 10 are provided on the positioning rod 30. Of course, the placement of the inner panel 10 placed after each S2 is the same as the first inner panel 10.

The opening of the inner panel 10 in S2 where the first "" shape is placed may be toward the side panel 20 or may be away from the side panel 20. Note that the opening orientations of all the "" shaped inner plates 10 placed in S3 are the same as the opening orientations of the inner plates 10 in S2. The opening of the inner panel 10 in S2 after the repetition is similarly oriented in the same direction as the opening of the first inner panel 10.

S5: passing the positioning rod 30 through the other side plate 20 so that the side plate 20 abuts on the inner plate 10, and then fastening the side plate 20 on the inner plate 10;

preferably, in an embodiment of the present invention, in order to facilitate adjustment of the relative position of the inner plate 10 between the side plates 20, the side plates 20 are clamped between the nuts 40 and the positioning rods 30 by screwing the nuts 40 to the positioning rods 30, so that the positions of the positioning rods 30 and the side plates 20 can be relatively fixed. When the inner plate 10 clamped between the two side plates 20 is askew or is not aligned well, the nuts 40 are only required to be unscrewed, then the position of the inner plate 10 is adjusted, the position change of the inner plate 10 drives the positioning rod 30 to move, after the inner plate 10 is adjusted, the inner plate 10 can be connected with the two ends of the positioning rod 30 through the nuts 40 in a threaded manner, and then the side plates 20 clamp the inner plate 10 between the two side plates 20.

It should be noted that the nut 40 needs to be screwed to the tightest after the adjustment between the inner plates 10 is completed.

Of course, the positioning rods 30 are circumferentially distributed at the edge of the side plate 20, and the inner plate 10 is locked by the plurality of positioning rods 30 in combination with the nuts 40, so that the relative positions of the gas heat exchange device before welding are stable, deviation is not easy to occur, and the heat exchange effect of the gas heat exchange device after welding is good.

The positioning rod 30 is usually provided with threads at both ends, and the rod diameter of the non-threaded portion is larger than that of the threaded portion, thereby achieving clamping of the side plate 20.

S6: the contact surfaces of the respective inner plates 10 and the contact surfaces of the inner plates 10 and the side plates 20 are welded.

Of course, the bending may not merely bend the edges of the metal plate into a "" shape perpendicular to the metal plate. As shown in fig. 3, when the inner panel 10 is bent only once, the inner panel 10 has only two first portions 121 perpendicular to the main body 11, and when the first portions 121 are abutted against other inner panels 10 or the side panels 20, the abutment is unstable because the inner panel 10 is a thin plate. In order to make the contact between the adjacent inner plates 10 smoother, bending is generally performed again in addition to bending at S1.

Specifically, referring to fig. 2 to 3, the inner panel 10 shown in fig. 3 includes a main body 11 and bent portions 12, the bent portions 12 being located at the top and bottom of the main body 11, respectively. The bending part 12 comprises a first portion 121 and a second portion 122, wherein the first portion 121 is perpendicular to the main body 11, the second portion 122 is an extension of the first portion 121, the second portion 122 is perpendicular to the first portion 121 and the second portion 122 is parallel to the second portion 122. The first portion 121 and the second portion 122 form an L-shaped bent portion 12, when the inner plates 10 abut against each other or when the inner plates 10 abut against the side plates 20, the second portion 122 abuts against the inner plates 10 or the side plates 20, that is, the abutting surface between the inner plates 10 and the abutting surface between the inner plates 10 and 20 are increased, and when the inner plates 10 and the side plates 20 are locked by the nuts 40, the locking is more stable.

Further, in an embodiment of the present invention, as shown in fig. 3, a third portion 123 is further provided, the third portion 123 is perpendicular to the main body 11 as shown, and the third portion 123 abuts against the first portion 121, and the third portion 123 abuts against the second portion 122. After setting up the third part 123, all buckling has been carried out to four corners of inner panel 10, and the holistic stability of inner panel 10 promotes greatly this moment for inner panel 10 can keep self shape under the blowing of air current.

Of course, the third portion 123 is also of an "L" shape, and when the inner panel 10 abuts against the inner panel 10 or when the inner panel 10 abuts against the side panel 20, as shown in fig. 4 or 6, the edge of the inner panel 10 where the first portion 121 is not provided can be supported, and the inner panel 10 can be stabilized during the air flow blowing.

After the installation of the inner panel 10 and the side panel 20 is completed and the positioning rod 30 is locked by the nut 40, the relative positions of the inner panel 10 and the side panel 20 are stable and not easily changed, and welding is performed at this time. Welding requires attention that when the edges of the inner panel 10 are not aligned, the edges of the inner panel 10 are flush when the flat splice is adjusted using an insert bevel copper block. Then, the abutting surfaces between the inner plates 10 and the abutting surfaces of the inner plates 10 and the side plates 20 are welded, thereby avoiding penetration.

Meanwhile, the welding power of the thin plate cannot be too high, otherwise, welding penetration occurs, the thin plate is required to be subjected to pulse welding, and the welding effect of the thin plate is ensured.

Preferably, in order to enable the gas flow to be uniformly distributed when passing through the gas flow channel 60 surrounded by the inner plate 10, and further to enable the heat exchange effect between the gases to be better, the inner plate 10 is punched in S1, and the convex hull 111 is formed on the inner plate 10 by punching.

As shown in fig. 2-7, the inner plate 10 is provided with a plurality of convex hulls 111 distributed in an array. Referring to fig. 5 and 7, when the inner plates 10 abut against each other, that is, when the bent portion 12 abuts against the main body 11, the convex hull 111 abuts against the main body 11.

It should be noted that the positions of the convex hulls 111 of the two adjacent inner plates 10 are not coincident, so that all the convex hulls 111 abut against the main body 11, so that the convex hulls 111 can support the main body 11, and the main body 11 is stable under the blowing of the air flow.

When the gas flow passes through the gas flow passage 60 surrounded by the two inner plates 10 as shown in fig. 5, the gas is uniformly dispersed into the respective portions of the gas flow passage 60 by the cutoff of the convex hull 111. Referring to fig. 7, when the cold and hot air flows simultaneously pass through the adjacent two air flow passages 60 surrounded by the inner plate 10, the cold and hot air flows are respectively cut off by the convex hulls 111 in the respective air flow passages 60 and are further dispersed to the respective areas of the air flow passages 60, so that the cold and hot air flows can fully exchange heat.

Of course, the convex hull 111 also has the effect of slowing down the gas flow rate, and when the gas flow rate is reduced, the residence time of the gas in the gas flow channel 60 is prolonged, and at this time, sufficient heat exchange time can be provided between the cold and hot gas flows, so that the heat exchange is more sufficient.

Further, the convex hull 111 is bordered by an arc surface structure, and the air flow is dispersed under the guidance of the arc surface but does not form turbulence.

Further, in order to prevent the inner plates 10 from being crushed when the nuts 40 are tightened, after each inner plate 10 is placed, the gaskets 50 are placed, so that the gaskets 50 are located between the two inner plates 10 and clamped by the inner plates 10, the gaskets 50 are of a solid structure, when the nuts 40 are locked, the gaskets 50 are clamped, the gaskets 50 are stable in structure and cannot be deformed by extrusion, and further the distance between the inner plates 10 is stable, so that the gas flow channels 60 can be used normally.

Referring to fig. 3, 5 and 7, the positioning rod 30 passes through the inner panel 10 from the side of the bent portion 12. To avoid dropping of the spacer 50 during use, the spacer 50 is typically provided at the positioning rod 30, the spacer 50 likewise being penetrated by the positioning rod 30.

Of course, a plurality of gaskets 50 are arranged in the same way, the stress of the inner plate 10 is uniform when the gaskets 50 are extruded, the gaskets 50 are arranged close to the bending parts, and the gaskets 50 are prevented from affecting the uniform wind of the convex hulls 111.

It will be understood that equivalents and modifications will occur to those skilled in the art based on the present invention and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention.

Claims (9)

1. The processing method of the gas-gas heat exchange device is characterized by comprising the following steps:

s1: taking a rectangular thin metal plate, bending edges of two opposite sides of the metal plate towards the middle of the metal plate to obtain inner plates, and repeating the bending to obtain a plurality of inner plates;

s2: fixing a positioning rod on the side plate, and abutting the bending part on the side plate after the positioning rod passes through one inner plate;

s3: after one inner plate is turned by n x 90 degrees (n is an odd number), the positioning rod passes through the inner plate, so that the bending part is abutted against the upper inner plate;

s4: repeating the steps S2 and S3 until a sufficient amount of inner plates are arranged on the positioning rod;

s5: passing the locating rod through another side plate so that the side plate abuts against the inner plate, and then fastening the side plate on the inner plate;

s6: and welding the abutting surfaces of the inner plates and the side plates.

2. A method of manufacturing a gas-to-gas heat exchanger according to claim 1, wherein the inner plate is provided with at least two.

3. The method of claim 1, wherein the inner plate comprises a main body and a bent portion, the bent portion comprising a first portion and a second portion, the first portion being perpendicular to the main body, the second portion being perpendicular to the first portion and parallel to the main body.

4. A method of manufacturing a gas-to-gas heat exchanger according to claim 3, wherein the bent portion further includes a third portion perpendicular to the main body, the third portion abutting the first portion, and the third portion abutting the second portion.

5. A method of processing a gas-to-gas heat exchanger according to claim 1, wherein the welding is pulse welding.

6. The method for processing a gas-gas heat exchange device according to claim 1, wherein S1 further comprises punching a plurality of convex hulls for uniform wind on the inner plate.

7. The method of claim 6, wherein the convex hulls are distributed in an array.

8. A method of manufacturing a gas-to-gas heat exchanger according to claim 3, wherein a gasket is provided between adjacent inner plates.

9. A method of manufacturing a gas-to-gas heat exchanger according to claim 8, wherein a plurality of the spacers are provided, and a plurality of the spacers are penetrated by the positioning rod.

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