阅读说明：本技术 适于支承和焊接的薄壁波纹换热管 (Thin-wall corrugated heat exchange tube suitable for supporting and welding ) 是由 王玉 钱江 丰艳春 于 2018-06-22 设计创作，主要内容包括：一种适于支承和焊接的薄壁波纹换热管,涉及换热管束领域。该适于支承和焊接的薄壁波纹换热管,省去了传统的波纹换热管的过渡接头,改由波纹管本体与管板直接焊接,隐患自然消除；另外,为改善传统的波纹换热管支承效果,增加了一长度超过折流板厚度的长直波纹结构的支承段,使波纹换热管整体获得支撑,提高了支撑的牢固性。该波纹换热管结构,明显优于传统的波纹换热管结构,其制造总成本降低,安全性得到提升,制造难度下降,具有设计合理、安全可靠的优点。(A thin-wall corrugated heat exchange tube suitable for supporting and welding relates to the field of heat exchange tube bundles. The thin-wall corrugated heat exchange tube suitable for supporting and welding omits a transition joint of the traditional corrugated heat exchange tube, and is directly welded with a tube plate by a corrugated tube body, so that hidden troubles are naturally eliminated; in addition, in order to improve the supporting effect of the traditional corrugated heat exchange tube, a supporting section of a long straight corrugated structure with the length exceeding the thickness of the baffle plate is added, so that the corrugated heat exchange tube is integrally supported, and the supporting firmness is improved. The corrugated heat exchange tube structure is obviously superior to the traditional corrugated heat exchange tube structure, the total manufacturing cost is reduced, the safety is improved, the manufacturing difficulty is reduced, and the corrugated heat exchange tube structure has the advantages of reasonable design, safety and reliability.)

1. The utility model provides a be suitable for support and welded thin wall ripple heat exchange tube, its characterized in that, ripple heat exchange tube includes support section, equidistance ripple section, first tube sheet welding section and second tube sheet welding section, and first tube sheet welding section and second tube sheet welding section are located the both ends of ripple heat exchange tube respectively, still are equipped with a plurality of equidistance ripple sections between first tube sheet welding section and second tube sheet welding section, and each equidistance ripple section passes through the support section and connects.

2. A thin-walled corrugated heat exchange tube adapted to be supported and welded as claimed in claim 1 wherein the length of the first welded section and the length of the second tube sheet welded section are both greater than the thickness of the tube sheets.

3. A thin walled corrugated heat exchange tube adapted to be supported and welded as claimed in claim 2 wherein the support section has a length greater than the baffle thickness.

4. A thin-walled corrugated heat exchange tube suitable for support and welding as claimed in any one of claims 1 to 3 wherein the first tube sheet welding section, the second tube sheet welding section and the support section are all long straight tubes.

5. A thin-walled corrugated heat exchange tube suitable for support and welding as claimed in any one of claims 1 to 3 wherein the support section, equidistant corrugated section, first tube sheet welded section and second tube sheet welded section have the same outside diameter.

Technical Field

The invention relates to a heat exchange tube bundle, in particular to a thin-wall corrugated heat exchange tube suitable for supporting and welding.

Background

The shell-and-tube heat exchanger belongs to a dividing wall type heat exchanger and is divided into a tube side and a shell side. According to the process requirement, different parameters and different types of media flow in the tube side and the shell side respectively and are used for heating or cooling the required media. When the corrugated heat exchange tube is used to replace a light tube as the heat exchange tube, the heat transfer condition is improved due to the turbulent flow effect of the corrugations on the fluid, and the corrugated heat exchange tube is very favorable for energy conservation. However, the traditional corrugated heat exchange tube (GB/T28713.2-2012) has two defects: first, reliable support is not easily achieved with conventional baffles. Because the corrugated pipe body is in a corrugated shape, the cross section of the corrugated pipe body is in an arc shape, and even if the wave crests are positioned in the pipe holes supported by the baffle plate, the wave crests are only in line contact. In practical conditions, one heat exchanger is provided with a plurality of baffle plates, so that wave crests can hardly be ensured to be positioned in baffle plate supporting pipe holes; secondly, transition joints are welded at two ends of the traditional corrugated heat exchange tube, so that two circumferential welds exist in the corrugated heat exchange tube, the circumferential welds are not subjected to nondestructive testing, equipment for installing the corrugated heat exchange tube has certain potential safety hazards, and the application range of the equipment is limited.

In order to improve the supporting condition of the traditional corrugated heat exchange tube, the measure of increasing the thickness of the baffle plate can be adopted to solve the problem. If the corrugation pitch of the corrugated heat exchange tube is 20mm, and the actual thickness of the baffle plate is 25mm, the adjacent wave crests can be ensured to be positioned in the tube holes of the baffle plate, and the requirement of reliable support is met. However, the method greatly increases the manufacturing cost, and the product lacks of market competitiveness.

Another method is that during forming, according to the position of the actual baffle plate, some thin collars with the length slightly larger than the thickness of the baffle plate are prefabricated, and the outer diameter of each thin collar is equal to the diameter of a wave crest. When in bulging, the material is embedded into the wave trough and is clamped by the wave crests on two sides. The process has two defects, namely, the free deformation of the corrugations at the embedding part is restrained, and under the condition of corroding media, the media intruding into the thin lantern ring are not suitable to come out, so that the corrosion of the base material of the corrugated heat exchange tube in the thin lantern ring is accelerated.

Chinese patent CN 204286188U discloses a corrugated heat exchange tube with an external tube holder, which is composed of a corrugated heat exchange tube and a tube holder. The pipe bracket is located at a position where the corrugated heat exchange pipe is to be provided with the baffle plate, the pipe bracket is a section of constant-diameter circular pipe, the outer wall of the pipe bracket is sleeved with an inner hole of the baffle plate in a clearance mode, the inner hole is embedded with the outer wall of the matched corrugated heat exchange pipe, the length L of the pipe bracket is the sum of the lengths of 2-3 sections of matched corrugated pipes, and the outer diameter D of the pipe bracket is 4-6 mm larger than the maximum outer diameter D2 of. The invention has the defects that the tube distribution density is greatly reduced due to the existence of the tube support, the heat exchange area of unit volume is seriously influenced, and the whole economy of the equipment is not good.

Disclosure of Invention

In view of the defects in the prior art, the invention aims to provide a thin-wall corrugated heat exchange tube suitable for supporting and welding, which has the advantages of quick heat dissipation and low cost.

The technical scheme adopted by the invention is as follows: the utility model provides a be suitable for support and welded thin wall ripple heat exchange tube, its technical essential is, the ripple heat exchange tube includes support section, equidistance ripple section, first tube sheet welding section and second tube sheet welding section, and first tube sheet welding section and second tube sheet welding section are located the both ends of ripple heat exchange tube respectively, still are equipped with a plurality of equidistance ripple sections between first tube sheet welding section and second tube sheet welding section, and each equidistance ripple section passes through the support section and connects.

In the scheme, the length of the first welding section and the length of the second tube plate welding section are both larger than the thickness of the tube plate.

In the scheme, the length of the support section is greater than the thickness of the baffle plate.

In the scheme, the first tube plate welding section, the second tube plate welding section and the supporting section are all long straight tubes.

In the scheme, the outer diameters of the supporting section, the equidistant corrugated section, the first tube plate welding section and the second tube plate welding section are the same.

The invention has the beneficial effects that: the thin-wall corrugated heat exchange tube suitable for supporting and welding omits a transition joint of the traditional corrugated heat exchange tube, and is directly welded with a tube plate by a corrugated tube body, so that hidden troubles are naturally eliminated; in addition, in order to improve the supporting effect of the traditional corrugated heat exchange tube, a supporting section of a long straight corrugated structure with the length exceeding the thickness of the baffle plate is added, so that the corrugated heat exchange tube is integrally supported, and the supporting firmness is improved. The corrugated heat exchange tube structure is obviously superior to the traditional corrugated heat exchange tube structure, the total manufacturing cost is reduced, the safety is improved, the manufacturing difficulty is reduced, and the corrugated heat exchange tube structure has the advantages of reasonable design, safety and reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a thin-walled corrugated heat exchange tube suitable for support and welding in an embodiment of the present invention;

FIG. 2 is a schematic view of a corrugated heat exchange tube in an embodiment of the present invention in conjunction with a tube sheet and baffles;

the numbers in the figure illustrate the following: 1 tube plate welding section, 2 equidistant corrugated sections, 3 supporting sections, 4 tube plate welding sections, 5 tube plates and 6 baffle plates.

Detailed Description

The above objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention with reference to the accompanying drawings 1 and 2.

The thin-wall corrugated heat exchange tube suitable for supporting and welding adopted in the embodiment is an integrally formed structure (namely, manufactured by a whole tube blank) mainly composed of a supporting section 3, an equidistant corrugated section 2, a tube plate welding section 1 and a tube plate welding section 4, the supporting section 3, the equidistant corrugated section 2, the tube plate welding section 1 and the tube plate welding section 4 have the same outer diameter, and the waveform of the thin-wall corrugated heat exchange tube comprises a long straight tubular structure, namely, an equidistant corrugated tube, a corrugated straight tube … …, an equidistant corrugated tube and a long straight tubular structure. The equidistant corrugated section 2 consists of wave crests and wave troughs, and mainly plays a role in disturbing the internal and external fluids so as to achieve the purpose of enhancing heat transfer. The tube plate welding section 1 and the tube plate welding section 4 are used as transition joints connected with the tube plate 5, the length of the transition joints is larger than the thickness of the baffle plate 6, the structure ensures that the whole corrugated heat exchange tube can be supported, the traditional corrugated tube body and the tube plate are welded together through the separately designed transition joints, along with the technical progress, the high-quality direct welding covering the existing corrugated tube body with the thickness of 0.6-1.2 mm and the tube plate 5 can be realized, and two 'redundant' welding circular seams existing on the traditional corrugated heat exchange tube are eliminated. The potential safety hazard caused by the existence of the circumferential weld in the manufacturing process of the corrugated heat exchange tube is eliminated, the bearing load of the welding joint of the corrugated heat exchange tube is reduced, and the economical efficiency and the safety of the corrugated heat exchange tube are greatly improved. The number and the position of the supporting sections 3 depend on the arrangement of baffle plates of the shell-and-tube heat exchanger, the length of the supporting sections is larger than the thickness of the baffle plates, and the supporting sections 3 mainly play a role in disturbing the internal fluid and the external fluid so as to achieve the purpose of strengthening heat transfer. The distance from the first left supporting part of the supporting section 3 to the left tube plate 5 is L1, the distance from the first right supporting part of the supporting section to the right tube plate is L2, which are determined by the parameters of the installed heat exchanger design drawing, 3 different cavities are used during forming to expand the waveform required correspondingly, the waveform width of the supporting section 3 and the tube plate welding sections 1 and 4 is at least 5 mm-8 mm larger than that of the baffle plate 6 and the tube plate 5, and the same requirements are met when external roll forming is adopted.

When the heat exchanger is assembled with the through pipe, the through pipe direction of the corrugated heat exchange pipe is selected according to the arrangement condition of the baffle plates of the heat exchanger, and as shown in figure 2, the corrugated section is supported and is completely positioned in the pipe hole of the baffle plate.

When the heat exchanger is in service for a long time and the corrugated heat exchange tube needs to be replaced, the specification of the corrugated heat exchange tube needs to be the same as that of the original equipment, and the installation attention points are as above.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.