Integrated plate type heat exchange tube, heat exchanger without contact thermal resistance fins and machining process of heat exchanger

Abstract

The invention relates to the technical field of heat exchange tubes, and particularly discloses an integrated plate type heat exchange tube, a heat exchanger without contact thermal resistance fins and a processing technology thereof.The integrated plate type heat exchange tube comprises a base plate of a cuboid structure, the base plate comprises a first face, and the first face comprises a first wide edge, a first long edge, a second wide edge and a second long edge which are connected in sequence; an outer bending area is arranged in the middle of the first face, the outer bending area extends to a first wide edge and a second wide edge which are opposite to each other, a first long edge and a second long edge on the two sides of the outer bending area are respectively provided with a welding area, and the welding areas extend to a first wide edge and a second wide edge which are opposite to each other. The heat exchange pipe is a pipe fitting formed when a plate part is machined, so that the cleaning degree and the corrosion resistance of the inner wall of the heat exchange pipe are improved, and the service life of the heat exchange pipe is prolonged; the substrate of the plate piece greatly facilitates the arrangement of the outer heat exchange fins and the subsequent arrangement of the inner heat exchange fins, and the production yield of products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange tubes, and in particular to an integrated plate-type heat exchange tube, a heat exchanger without contact thermal resistance fins, and a processing technology thereof. Background Art

[0002] Some heat exchange tube fittings on the market are pipe fittings before they are made into finished products, which makes it inconvenient to perform welding operations inside the tubes, cleaning before processing, and coating treatments, resulting in low utilization efficiency of the tubes and a short service life of the fittings.

[0003] Therefore, the prior art is insufficient and needs to be improved. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is that some pipe fittings of heat exchange tubes are pipe fittings before being made into finished products, which makes it inconvenient to perform welding operations inside the tubes, clean before processing, and perform coating treatments, resulting in low utilization efficiency inside the tubes and a short service life of the pipe fittings.

[0005] In order to solve the above problems, an embodiment of the present invention provides an integrated plate-type heat exchange tube, including a substrate with a rectangular structure, the substrate including a first surface, the first surface including a first wide side, a first long side, a second wide side and a second long side connected in sequence, an outer bending area is arranged in the middle position of the first surface, the outer bending area extends to two opposite first wide sides and second wide sides, a welding area is respectively arranged at the first long side and the second long side on both sides of the outer bending area, the welding area extends to the two opposite first wide sides and second wide sides, and on the first surface except for the welding area and the outer bending area, a plurality of groups of external heat exchange fins are integrally opened, and the substrate is bent in the outer bending area to have an opening with a flat elliptical structure and is welded and fixed and sealed through the welding area to form a heat exchange tube.

[0006] Optionally, the external heat exchange fins are opened on the substrate by a fin cutting and toothing process.

[0007] Optionally, the external heat exchange fins are generally in a regular corrugated shape, an irregular corrugated shape, an intermittent corrugated shape, a zigzag line shape or a straight line shape.

[0008] Optionally, the substrate is made of copper plate, stainless steel plate or aluminum alloy plate.

[0009] Optionally, the substrate also includes a second surface opposite to the first surface, and in addition to the part corresponding to the outer bending area and the welding area on the second surface, multiple groups of internal heat exchange fins are integrally opened, and an inner bending area is arranged on the second surface corresponding to the outer bending area. The internal heat exchange fins are opened along the length direction of the substrate, and after the substrate is bent and welded, the corresponding internal heat exchange fins located on both sides of the inner bending area are staggered.

[0010] Optionally, a surface protrusion structure is provided outside a portion of the second surface corresponding to the inner bending area and the welding area.

[0011] The present invention also provides a heat exchanger without contact thermal resistance fins, comprising the above-mentioned integrated plate-type heat exchange tube, and also comprising an elbow adapter, wherein the elbow adapter connects the heat exchange tube to form an S-shaped combination.

[0012] Optionally, the heat exchanger without contact thermal resistance fins also includes an inlet adapter and an outlet adapter, the inlet adapter is connected to the head end of the heat exchange tube connected to the elbow adapter, and the outlet adapter is connected to the tail end of the heat exchange tube connected to the elbow adapter.

[0013] Optionally, the inlet adapter and the outlet adapter are respectively fixed to the pipe openings of the heat exchange tubes and are sealedly connected.

[0014] The present invention also provides a processing technology for the heat exchanger without contact thermal resistance fins, comprising the following steps: Step S1: providing a substrate, on a first surface of the substrate, and in a non-welding area and an outer bending area, an outer heat exchange fin is integrally provided; Step S2: On the second surface of the substrate, in the area corresponding to the non-welding area and the inner bending area, inner heat exchange fins are integrally provided along the length direction of the substrate; Step S3: a surface protrusion structure is provided on the second surface of the substrate, in the area corresponding to the non-welding area and the inner bending area; Step S4: bending the substrate through the bending area and welding through the welding area to form a heat exchange tube; Step S5: Connect the heat exchange tubes in sequence into an S-shaped combination using an elbow adapter; Step S6: Connect the inlet adapter to the head end of the heat exchange tube connected to the elbow adapter, and connect the outlet adapter to the tail end of the heat exchange tube connected to the elbow adapter.

[0015] Compared with the prior art, the technical effects achieved by the embodiments of the present invention include: The heat exchange tube of the present invention is a tube formed by processing a sheet member, so that the staff can perform internal cleaning and coating treatment on the sheet member before forming the tube, thereby increasing the cleanliness and corrosion resistance of the inner wall of the heat exchange tube, which is beneficial to improving the service life of the heat exchange tube; the substrate of the sheet member greatly facilitates the opening of the external heat exchange fins and the subsequent opening of the internal heat exchange fins, which is beneficial to reducing the difficulty of the operation and at the same time is beneficial to improving the production yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 It is a three-dimensional structural diagram of a heat exchanger without contact thermal resistance fins of the present invention; Figure 2 It is a structural diagram of the base plate, the inner heat exchange fins and the outer heat exchange fins; Figure 3 It is the front view of the base plate and the inner heat exchange fins; Figure 4-8 It is a structural diagram of the external heat exchange fin in different embodiments; Fig. 9 The present invention is a flow chart of the processing technology of the heat exchanger without contact thermal resistance fins.

[0020] Reference numerals 1. Base plate; 2. External heat exchange fins; 3. Internal heat exchange fins; 4. Elbow adapter; 5. Inlet adapter; 6. Outlet adapter; 7. First side; 8. First wide side; 9. First long side; 10. Second wide side; 11. Second long side; 12. External bending area; 13. Welding area; 14. Second side; 15. Internal bending area; 16. Heat exchange tube; 17. Surface protrusion structure. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Similar component numbers in the drawings represent similar components. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0023] It should also be understood that the terms used in this description of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the description of the embodiments of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms of "a", "an" and "the" are intended to include plural forms.

[0024] See also Figure 1-3 The embodiment of the present invention provides a heat exchanger without contact thermal resistance fins, which is used for high-temperature flue gas to achieve convective heat exchange and radiation heat exchange of its internal liquid through the outer surface, including a substrate 1 with a rectangular structure, an outer heat exchange fin 2, an inner heat exchange fin 3, an elbow adapter 4, an inlet adapter 5 and an outlet adapter 6, the outer heat exchange fin 2 is opened on one surface of the substrate 1, and the inner heat exchange fin 3 is opened on the opposite surface, and the substrate 1 is processed into a heat exchange tube 16 with a hollow columnar structure by bending and welding, wherein the inner heat exchange fin 3 is located in the columnar structure, and the outer heat exchange fin 2 is located on the outer peripheral side of the columnar structure. The elbow adapter 4 is provided with multiple groups, which connect the heat exchange tube 16 to form an S-shaped combination. The shape has the beneficial effects of relatively stable structure and reasonable space arrangement, which is conducive to improving heat exchange efficiency. The inlet adapter 5 is connected to the head end of the heat exchange tube 16 connected to the elbow adapter 4, and the outlet adapter 6 is connected to the tail end of the heat exchange tube 16 connected to the elbow adapter 4. The heat exchange tube 16 of the present invention is a tube formed by processing a sheet material, so that the staff can perform internal cleaning and coating treatment on the sheet material before forming the tube, thereby increasing the cleanliness and corrosion resistance of the inner wall of the heat exchange tube 16, which is beneficial to improving the service life of the heat exchange tube 16.

[0025] Please continue reading Figure 1 The inlet adapter 5 and the outlet adapter 6 are respectively fixedly and sealedly connected to the pipe ends of the heat exchange tube 16, that is, the inlet adapter 5, the outlet adapter 6 and the heat exchange tube 16 are fixedly connected without any gap, which improves the strength of the overall structure and avoids the possibility of leakage at the connection, reducing the probability of maintenance.

[0026] See also Figure 2The material of the substrate 1 is copper plate, stainless steel plate or aluminum alloy plate, which has the advantages of better structural strength, better heat transfer effect and not easy to be corroded, including but not limited to these. Other materials with high thermal conductivity, high ductility and good corrosion resistance can also be selected. Specifically, the substrate 1 includes a first surface 7. It can be understood that the first surface 7 is one of the surfaces formed by the long side and the wide side of the cuboid. The first surface 7 includes a first wide side 8, a first long side 9, a second wide side 10 and a second long side 11 connected in sequence. An outer bending area 12 is arranged in the middle position of the first surface 7. The outer bending area 12 extends to the two opposite first wide sides 8 and the second wide sides 10, that is, the outer bending area 12 is arranged in the length direction of the first surface 7 and divides the first surface 7 into three parts. The arrangement of the outer bending area 12 facilitates subsequent bending operations; a welding area 13 is respectively arranged at the first long side 9 and the second long side 11 on both sides of the outer bending area 12. The welding area 13 extends to the two opposite first wide sides 8 and the second wide sides 10, wherein the welding area 13 is also arranged along the length direction of the first surface 7 and is located at both sides, and its arrangement facilitates subsequent welding operations. It can be understood that there is no limitation on the size setting of the welding area 13 and the outer bending area 12, and it can be set according to actual conditions.

[0027] See also Figure 2 In addition to the welding area 13 and the outer bending area 12, multiple sets of the above-mentioned external heat exchange fins 2 are integrally provided on the first surface 7. Since the external heat exchange fins 2 and the base plate 1 are integrally formed, no additional welding and fixing is required, and there is no contact thermal resistance, which is conducive to improving the overall heat exchange performance; please refer to Figure 4-8 Specifically, the outer heat exchange fin 2 is in the shape of a regular corrugation, an irregular corrugation, an intermittent corrugation, a zigzag line or a straight line as a whole, which is conducive to contact and heat exchange with the high-temperature flue gas, including but not limited to this, and other shapes and structures that are conducive to heat exchange can also be selected.

[0028] See also Figure 3The substrate 1 of the embodiment of the present invention further includes a second surface 14 opposite to the first surface 7. In addition to the portion corresponding to the outer bending area 12 and the welding area 13 on the second surface 14, multiple groups of the above-mentioned inner heat exchange fins 3 are integrally provided. The inner heat exchange fins 3 are integrally provided with the substrate 1, and no additional welding fixation is required, and there is no contact thermal resistance, which is beneficial to improving the overall heat exchange performance. At the same time, the inner heat exchange fins 3 located in the tube increase the inner surface heat exchange area and also enhance the turbulence of the liquid flow, which is beneficial to enhancing the heat exchange performance. An inner bending area 15 is provided on the second surface 14 corresponding to the outer bending area 12. Preferably, the inner heat exchange fins 3 are provided along the length direction of the substrate 1. After the substrate 1 is bent and welded, the inner heat exchange fins 3 corresponding to both sides of the inner bending area 15 are arranged in an interlaced manner. When the liquid flows inside, it will be blocked to a certain extent by the inner heat exchange fins 3 in the direction of liquid flow, and at the same time, the contact area between the heat exchange tube 16 and the liquid inside it is increased, which is beneficial to improving the heat exchange performance. The outer heat exchange fins 2 and the inner heat exchange fins 3 are both formed on the substrate 1 by a fin cutting and tooth-cutting process.

[0029] In the present invention, the substrate 1 is bent by an external bending mechanism in the outer bending zone 12 to form a flat elliptical structure, and is welded and fixed by an external welding mechanism through the welding zone 13 and sealed to form a heat exchange tube 16. The heat exchange tube 16 with a flat elliptical structure may have a smaller windward area than a circular tube under the same liquid flow rate, flows more smoothly on the leeward side, and no large-scale vortex structure is formed, which effectively reduces the smoke flow resistance and enhances the heat exchange performance.

[0030] Please continue reading Figure 3 On the second surface 14, outside the portion corresponding to the welding area 13 and the inner bending area 15, a surface protrusion structure 17 is provided. The provision of this structure increases the contact area between the inner surface of the heat exchange tube 16 and the liquid, so that the heat of the heat exchange tube 16 can be transferred to the liquid flowing therein more quickly, and the heat transfer efficiency is higher. In the present invention, the substrate 1, the outer heat exchange fins 2, the inner heat exchange fins 3 and the surface protrusion structure 17 form an integrated plate-type heat exchange tube structure.

[0031] See also Fig. 9 The present invention also provides a process for processing a heat exchanger without contact thermal resistance fins, comprising the following steps: Step S1: providing a substrate, on a first surface of the substrate, and in a non-welding area and an outer bending area, an outer heat exchange fin is integrally provided.

[0032] The first surface is a surface formed by the long side and the wide side of the substrate.

[0033] Step S2: On the second surface of the substrate, in the area corresponding to the non-welding area and the inner bending area, inner heat exchange fins are integrally provided along the length direction of the substrate; Step S3: a surface protrusion structure is provided on the second surface of the substrate, in the area corresponding to the non-welding area and in the inner bending area.

[0034] By providing a surface protrusion structure, the contact area with the liquid is increased, so that the heat at the heat exchange tube can be transferred to the liquid therein more quickly, which is beneficial to improving the heat transfer efficiency.

[0035] Step S4: bending the substrate through the bending area and welding through the welding area to form a heat exchange tube.

[0036] The tube mouth of the bent heat exchange tube is flat elliptical, with no large-scale vortex structure formed, which also effectively reduces the flue gas flow resistance and enhances the heat exchange performance.

[0037] Step S5: Use elbow adapters to sequentially connect the heat exchange tubes into an S-shaped combination.

[0038] The S-shaped combination has the advantage of better structural strength.

[0039] Step S6: Connect the inlet adapter to the head end of the heat exchange tube connected to the elbow adapter, and connect the outlet adapter to the tail end of the heat exchange tube connected to the elbow adapter.

[0040] At this point, the processing of the heat exchanger without contact thermal resistance fins is completed.

[0041] Compared with the prior art, the technical effects achieved by the embodiments of the present invention include: The heat exchange tube of the present invention is a tube formed by processing a sheet member, so that the staff can perform internal cleaning and coating treatment on the sheet member before forming the tube, thereby increasing the cleanliness and corrosion resistance of the inner wall of the heat exchange tube, which is beneficial to improving the service life of the heat exchange tube; the substrate of the sheet member greatly facilitates the opening of the external heat exchange fins and the subsequent opening of the internal heat exchange fins, which is beneficial to reducing the difficulty of the operation and at the same time is beneficial to improving the production yield of the product.

[0042] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0049] The above is a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An integrated plate-type heat exchange tube, characterized in that: The invention comprises a substrate with a rectangular structure, wherein the substrate comprises a first surface, wherein the first surface comprises a first wide side, a first long side, a second wide side and a second long side connected in sequence, an outer bending area is arranged in the middle position of the first surface, the outer bending area extends to two opposite first wide sides and second wide sides, a welding area is respectively arranged at the first long side and the second long side on both sides of the outer bending area, the welding area extends to two opposite first wide sides and second wide sides, and a plurality of groups of external heat exchange fins are integrally provided on the first surface except for the welding area and the outer bending area, and the opening of the substrate after being bent in the outer bending area presents a flat elliptical structure and is welded and fixed and sealed through the welding area to form a heat exchange tube.

2. The integrated plate-type heat exchange tube according to claim 1, characterized in that: The external heat exchange fins are opened on the substrate by a fin cutting and tooth-cutting process.

3. The integrated plate-type heat exchange tube according to claim 1, characterized in that: The external heat exchange fins are generally in a regular corrugated shape, an irregular corrugated shape, an intermittent corrugated shape, a broken line shape or a straight line shape.

4. The integrated plate-type heat exchange tube according to claim 1, characterized in that: The substrate is made of copper plate, stainless steel plate or aluminum alloy plate.

5. The integrated plate-type heat exchange tube according to claim 1, characterized in that: The substrate also includes a second surface opposite to the first surface. In addition to the portion of the second surface corresponding to the outer bending area and the welding area, multiple groups of inner heat exchange fins are integrally provided. An inner bending area is provided on the second surface corresponding to the outer bending area. The inner heat exchange fins are provided along the length direction of the substrate. After the substrate is bent and welded, the inner heat exchange fins corresponding to both sides of the inner bending area are staggered.

6. The integrated plate-type heat exchange tube according to claim 5, characterized in that: A surface protrusion structure is arranged outside the portion of the second surface corresponding to the inner bending area and the welding area.

7. A heat exchanger without contact thermal resistance fins, characterized in that: It comprises a plurality of integrated plate-type heat exchange tubes as described in any one of claims 1 to 6, and also comprises an elbow adapter, wherein the elbow adapter is respectively connected to two heat exchange tubes to form an S-shaped combination.

8. The heat exchanger without contact thermal resistance fins according to claim 7, characterized in that: The heat exchanger without contact thermal resistance fins also includes an inlet adapter and an outlet adapter, the inlet adapter is connected to the head end of the heat exchange tube connected to the elbow adapter, and the outlet adapter is connected to the tail end of the heat exchange tube connected to the elbow adapter.

9. The heat exchanger without contact thermal resistance fins according to claim 8, characterized in that: The inlet adapter and the outlet adapter are respectively fixed to the pipe openings of the heat exchange pipes and are sealedly connected.

10. A process for processing a heat exchanger without contact thermal resistance fins as claimed in claim 8, characterized in that: The steps include: Step S1: providing a substrate, on a first surface of the substrate, and in a non-welding area and an outer bending area, an outer heat exchange fin is integrally provided; Step S2: On the second surface of the substrate, in the area corresponding to the non-welding area and the inner bending area, inner heat exchange fins are integrally provided along the length direction of the substrate; Step S3: a surface protrusion structure is provided on the second surface of the substrate, in the area corresponding to the non-welding area and the inner bending area; Step S4: bending the substrate through the bending area and welding through the welding area to form a heat exchange tube; Step S5: Connect the heat exchange tubes in sequence into an S-shaped combination using an elbow adapter; Step S6: Connect the inlet adapter to the head end of the heat exchange tube connected to the elbow adapter, and connect the outlet adapter to the tail end of the heat exchange tube connected to the elbow adapter.

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