Enhanced heat exchange assembly of large heat pipe heat exchanger

Abstract

The utility model relates to the technical field of heat pipe heat exchangers, in particular to an enhanced heat exchange assembly of a large heat pipe heat exchanger. A plurality of upper heat pipes are mounted at the top of the connecting cylinder, each upper heat pipe comprises two symmetrical corrugated pipes, a bent pipe is mounted between the top ends of the two corrugated pipes, and the bottom ends of the two corrugated pipes are communicated with an inner cavity of the connecting cylinder; a plurality of lower heat pipes are fixed at the bottom of the connecting cylinder; the upper heat pipe is composed of the corrugated pipe and the bent pipe, when steam moves in the corrugated pipe and the bent pipe, the stroke of the steam is lengthened, and therefore heat of the steam can be better transferred to the upper heat pipe, a cold medium can better absorb the heat of the upper heat pipe, and the heat exchange effect and the heat exchange efficiency of the upper heat pipe are improved through the design. The bristles brush the outer wall of the lower heat pipe in a reciprocating mode, so that impurities and the like adhering to the lower heat pipe are peeled off, the problem that the heat exchange effect of the lower heat pipe is affected due to adhesion of the impurities is solved, and the heat exchange efficiency of the lower heat pipe is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pipe heat exchangers, in particular to a heat transfer enhancement component of a large-scale heat pipe heat exchanger. Background Art

[0002] A heat pipe heat exchanger is a device that uses heat pipes as heat transfer elements to achieve heat exchange between cold and hot fluids. Heat pipe heat exchangers are mainly divided into integral heat pipe heat exchangers, separated heat pipe heat exchangers, rotary heat pipe heat exchangers, and volute heat pipe heat exchangers, etc. At present, heat pipe heat exchangers are widely used in industries such as metallurgy, chemical industry, oil refining, boilers, ceramics, transportation, light textiles, machinery, and electronics.

[0003] The utility model patent with the authorization announcement number of CN101672590A discloses a combined shell-and-tube heat pipe heat exchanger. The combined shell-and-tube heat pipe heat exchanger includes an upper shell 8 and a lower shell 2. The characteristics are that a cold medium inlet 7 and a cold medium outlet 12 are provided on the shell wall of the upper shell 8. A plurality of U-shaped or straight-tube-shaped upper heat pipes 9 are installed in the upper shell 8. One end of the U-shaped or straight-tube-shaped upper heat pipe 9 is hermetically fixed in a corresponding through hole on the upper tube plate 15. The upper tube plate 15 is connected to the lower end of the upper shell 8. The other end of the U-shaped or straight-tube-shaped upper heat pipe 9 is suspended or fixed in the upper cover plate 10. For the straight-tube-shaped upper heat pipe 9, the end suspended or fixed in the upper cover plate 10 is in a blocked state. The upper cover plate 10 is connected to the upper end of the upper shell 8. A hot medium inlet 1 and a hot medium outlet 16 are provided on the shell wall of the lower shell 2. A plurality of U-shaped or straight-tube-shaped lower heat pipes 3 are installed in the lower shell 2. One end of the U-shaped or straight-tube-shaped lower heat pipe 3 is hermetically fixed in a corresponding through hole on the lower tube plate 5. The lower tube plate 5 is connected to the upper end of the lower shell 2. The other end of the U-shaped or straight-tube-shaped lower heat pipe 3 is suspended or fixed in the lower cover plate 17. For the straight-tube-shaped lower heat pipe 9, the end suspended or fixed in the lower cover plate 17 is in a blocked state. The lower cover plate 17 is connected to the lower end of the lower shell 2. The upper tube plate 15 and the lower tube plate 5 are directly connected or respectively installed at both ends of the connecting cylinder 19, thereby forming a complete heat exchanger composed of two upper and lower parts connected together. A steam-liquid separation and exchange space 20 communicating the upper heat pipe 9 and the lower heat pipe 3 is formed between the joint surface of the directly connected upper tube plate 15 and the lower tube plate 5 or in the connecting cylinder 19. An exhaust and liquid filling pipe 13 is connected to the upper end of the connecting cylinder 19, the upper tube plate 15 or the lower cover plate 17. The exhaust and liquid filling pipe 13 communicates with the steam-liquid separation and exchange space 20 or with the unsealed end of the straight-tube-shaped lower heat pipe 3. Through the sealed butt joint of the upper and lower tube plates, the original independent heat pipes form a shell-and-tube heat pipe heat exchanger that communicates with each other through the gaps between the tube plates. Since there is no sealing problem between each heat pipe and the partition plate in this kind of heat exchanger, the tube layout density can be greatly improved. The shell can adopt a circular structure, so it can withstand high pressure and the applicable range is greatly expanded.

[0004] Although the combined shell-and-tube heat pipe heat exchanger has expanded the applicable range of the installation, there are still the following problems in its actual use: In this device, the upper heat pipe and the lower heat pipe can be any combination of straight pipes and U-shaped pipes. However, when the upper and lower heat pipes of this shape are in use, the heat exchange effect is limited and cannot improve the heat exchange efficiency. In view of this, we have developed a heat transfer enhancement component for a large-scale heat pipe heat exchanger. Summary of the Invention

[0005] To solve the above problems, the present invention provides a heat transfer enhancement component for a large-scale heat pipe heat exchanger.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] The heat transfer enhancement component of the large-scale heat pipe heat exchanger includes a connecting cylinder. The connecting cylinder has a hollow structure. A plurality of upper heat pipes are installed at the top of the connecting cylinder. Each upper heat pipe includes two symmetrically arranged corrugated pipes. A bent pipe is installed between the tops of the two corrugated pipes. The bottoms of the two corrugated pipes communicate with the inner cavity of the connecting cylinder. A plurality of lower heat pipes are fixed at the bottom of the connecting cylinder, and the lower heat pipes communicate with the inner cavity of the connecting cylinder.

[0008] An upper shell is installed above the connecting cylinder. The upper shell is sleeved outside the plurality of upper heat pipes. A cold medium inlet is installed at the bottom end of the outer wall of the upper shell, and a cold medium outlet is installed at the top end of the outer wall of the upper shell.

[0009] A lower shell is installed below the connecting cylinder. The lower shell is sleeved outside the plurality of lower heat pipes. A hot medium outlet is installed at the top end of the outer wall of the lower shell, and a hot medium inlet is installed at the bottom end of the outer wall of the lower shell. A lead screw is rotatably installed at the inner bottom of the lower shell. A disk is threadedly connected to the lead screw. A plurality of through holes are formed in the disk. A plurality of bristles are fixed to the inner walls of the through holes. The lower heat pipes pass through the corresponding through holes, and the ends of the bristles abut against the outer walls of the lower heat pipes. A motor for driving the lead screw to rotate is installed at the bottom of the lower shell.

[0010] Furthermore, an installation disk is installed on the outer wall of the connecting cylinder. A plurality of connection holes are formed in the installation disk. A first flange is coaxially fixed at the bottom end of the upper shell. A plurality of connection bolts pass through the first flange. A second flange is coaxially fixed at the top end of the lower shell. The connection bolts pass through the first flange, the connection holes, and the second flange, and nuts are threadedly connected to the ends of the connection bolts.

[0011] Furthermore, the corrugated pipes and the bent pipe are integrally formed, and the plurality of upper heat pipes are evenly distributed in a ring shape at equal intervals.

[0012] Furthermore, the overall shape of the corrugated pipe is wavy, and the overall shape of the bent pipe is arched.

[0013] Further, sealing grooves are formed in both the upper and lower walls of the mounting disc, sealing rings are inserted into the sealing grooves, connecting grooves are formed in two opposite end faces of the first flange and the second flange, and the upper and lower sealing rings are respectively inserted and matched with the connecting grooves.

[0014] Further, the plurality of lower heat pipes are annularly and equally spaced, and the lower heat pipes are straight pipes.

[0015] Further, two guiding grooves are formed in the outer wall of the disc body, guide rails are fixed to both inner side walls of the lower housing, and the guide rails are slidably connected with the guiding grooves.

[0016] Further, a hollow protective cover is fixedly connected to the outside of the motor at the bottom of the lower housing through bolts, and a plurality of heat dissipation grooves are formed in the outer wall of the protective cover.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. By providing the upper heat pipe, which is composed of a corrugated pipe and a bent pipe, when steam moves in the corrugated pipe and the bent pipe, the travel of the steam becomes longer, so that the heat of the steam can be better transferred to the upper heat pipe, and thus it is beneficial for the cold medium to better absorb the heat of the upper heat pipe. This design improves the heat exchange effect and heat exchange efficiency of the upper heat pipe;

[0019] 2. By providing the lower heat pipe and the brush bristles, etc., the motor drives the screw rod to rotate to drive the disc body to move up and down, and the brush bristles reciprocally brush the outer wall of the lower heat pipe, so that impurities adhered to the lower heat pipe are peeled off, thereby avoiding the problem that the heat exchange effect of the lower heat pipe is affected by the adhesion of impurities and ensuring the heat exchange efficiency of the lower heat pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is a cross-sectional view of the overall structure of the present utility model;

[0022] Figure 3 is a schematic diagram of the overall exploded structure of the present utility model;

[0023] Figure 4 is a schematic diagram of a partial structure of the present utility model;

[0024] Figure 5 is a schematic diagram of the exploded structure of the connecting cylinder of the present utility model;

[0025] Figure 6 is a schematic diagram of the structure of the disc body of the present utility model;

[0026] In the figure:

[0027] 1. Connecting cylinder; 10. Mounting plate; 101. Sealing groove; 11. Lower heat pipe; 12. Upper heat pipe; 120. Bellows; 121. Elbow; 13. Sealing ring;

[0028] 2. Upper housing; 20. Cold medium inlet; 21. Cold medium outlet; 22. First flange; 23. Connecting bolt;

[0029] 3. Lower housing; 30. Hot medium inlet; 31. Hot medium outlet; 32. Protective cover; 320. Heat dissipation groove; 33. Motor; 34. Second flange; 35. Lead screw; 36. Disk body; 360. Through hole; 361. Brush bristles; 362. Guide groove. Specific implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] This embodiment provides a technical solution:

[0032] Please refer to Figures 1-6 As shown, the enhanced heat transfer component of the large heat pipe heat exchanger includes a connecting cylinder 1. The connecting cylinder 1 has a hollow structure. A plurality of upper heat pipes 12 are installed at the top of the connecting cylinder 1. The upper heat pipe 12 includes two symmetrically arranged bellows 120. An elbow 121 is installed between the tops of the two bellows 120. The bottoms of the two bellows 120 communicate with the inner cavity of the connecting cylinder 1. A plurality of lower heat pipes 11 are fixed at the bottom of the connecting cylinder 1, and the lower heat pipes 11 communicate with the inner cavity of the connecting cylinder 1. A detachable upper housing 2 is installed above the connecting cylinder 1. The upper housing 2 is sleeved outside a plurality of upper heat pipes 12. A cold medium inlet 20 is installed at the bottom end of the outer wall of the upper housing 2, and a cold medium outlet 21 is installed at the top end of the outer wall of the upper housing 2. A detachable lower housing 3 is installed below the connecting cylinder 1. The lower housing 3 is sleeved outside a plurality of lower heat pipes 11. A hot medium outlet 31 is installed at the top end of the outer wall of the lower housing 3, and a hot medium inlet 30 is installed at the bottom end of the outer wall of the lower housing 3. A lead screw 35 is rotatably installed at the inner bottom of the lower housing 3. A disk body 36 is threadedly connected to the lead screw 35. A plurality of through holes 360 are opened on the disk body 36. A plurality of brush bristles 361 are fixed on the inner wall of the through hole 360. The lower heat pipe 11 passes through the corresponding through hole 360, and the end of the brush bristle 361 abuts against the outer wall of the lower heat pipe 11. A motor 33 for driving the lead screw 35 to rotate is installed at the bottom of the lower housing 3.

[0033] In this embodiment, an installation disk 10 is installed on the outer wall of the connecting cylinder 1, and a plurality of connecting holes are provided on the installation disk 10; a first flange 22 is coaxially fixed at the bottom end of the upper housing 2, and a plurality of connecting bolts 23 pass through the first flange 22, the connecting holes and the second flange 34. The end of the connecting bolt 23 is threadedly connected with a nut. This design facilitates the connection and fixation of the upper housing 2 and the lower housing 3 to the connecting cylinder 1 through the connecting bolts 23. It not only has the advantage of reliable connection, but also is convenient for disassembly and assembly, facilitating later maintenance and other work.

[0034] In this embodiment, the corrugated pipe 120 and the elbow pipe 121 are of an integrally formed structure, and a plurality of upper heat pipes 12 are distributed at equal intervals in a ring shape. The integrally formed corrugated pipe 120 and elbow pipe 121 have better structural strength, and the design of equal interval distribution in a ring shape improves the heat exchange effect of the upper heat pipes 12.

[0035] In this embodiment, the overall shape of the corrugated pipe 120 is wavy, and the overall shape of the elbow pipe 121 is arched. The wavy and arched designs increase the travel of the steam in the upper heat pipes 12, thereby improving the heat exchange efficiency of the upper heat pipes 12.

[0036] In this embodiment, sealing grooves 101 are provided on both the upper and lower walls of the installation disk 10, sealing rings 13 are inserted in the sealing grooves 101, connecting grooves are provided on two opposite end faces of the first flange 22 and the second flange 34, and the upper and lower sealing rings 13 are respectively inserted and matched with the connecting grooves. The setting of the sealing rings 13 increases the sealing performance at the connection between the first flange 22 and the second flange 34 and the installation disk 10, improving the overall sealing performance of the device.

[0037] In this embodiment, a plurality of lower heat pipes 11 are distributed at equal intervals in a ring shape, and the lower heat pipes 11 are straight pipes. This design ensures the heat exchange effect of the lower heat pipes 11.

[0038] In this embodiment, two guiding grooves 362 are provided on the outer wall of the disk body 36, guide rails 37 are fixed on both inner walls of the lower housing 3, and the guide rails 37 are slidably connected with the guiding grooves 362. The arrangement of the guide rails 37 and the guiding grooves 362 plays a guiding role in the lifting movement of the disk body 36, ensuring the stability of the disk body 36.

[0039] In this embodiment, a hollow protective cover 32 is fixedly connected by bolts at the outer part of the bottom of the lower housing 3 where the motor 33 is located, and a plurality of heat dissipation grooves 320 are provided on the outer wall of the protective cover 32. The protective cover 32 plays a protective role for the motor 33, and the heat dissipation grooves 320 are conducive to the heat dissipation of the motor 33.

[0040] It should be added that the bristles 361 in this embodiment are made of nylon material. Nylon material has the advantages of high strength, wear resistance, and chemical corrosion resistance. Selecting nylon material as the production material for the bristles 361 not only improves the durability and service life of the product but also ensures the cleaning effect on the outer wall of the lower heat pipe 11.

[0041] It is worth noting that the motor 33 involved in this embodiment is an existing conventional technology and will not be elaborated here.

[0042] During specific use, the heat medium enters the lower housing 3 through the heat medium inlet, and the lower heat pipe 11 is heated. The fluid in the lower heat pipe 11 evaporates into high-temperature steam. The high-temperature steam enters the connecting cylinder 1 and then flows into the upper heat pipe 12. The heat of the high-temperature steam is simultaneously absorbed by the upper heat pipe 12, and the steam gradually cools down and liquefies and flows back. At the same time, the cold medium enters through the cold medium inlet 20. The cold medium is heated when passing through the upper heat pipe 12, and the heated liquid is discharged through the cold medium outlet 21.

[0043] When cleaning the lower heat pipe 11, the user first turns on the power of the motor 33. The motor 33 starts to work, and the output shaft of the motor 33 rotates to drive the lead screw 35 to rotate. As the lead screw 35 rotates, the disk body 36 reciprocates in the vertical direction, and at the same time, the bristles 361 reciprocally clean the outer wall of the lower heat pipe 11, and the impurities adhering to the outer wall of the lower heat pipe 11 are cleaned.

[0044] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Enhanced heat transfer component of a large-scale heat pipe heat exchanger, comprising a connecting cylinder (1), characterized in that: The connecting cylinder (1) has a hollow structure. A plurality of upper heat pipes (12) are installed at the top of the connecting cylinder (1). The upper heat pipes (12) include two symmetrically arranged corrugated pipes (120). A bent pipe (121) is installed between the tops of the two corrugated pipes (120). The bottoms of the two corrugated pipes (120) are communicated with the inner cavity of the connecting cylinder (1). A plurality of lower heat pipes (11) are fixed at the bottom of the connecting cylinder (1), and the lower heat pipes (11) are communicated with the inner cavity of the connecting cylinder (1). An upper shell (2) is installed above the connecting cylinder (1). The upper shell (2) is sleeved outside a plurality of upper heat pipes (12). A cold medium inlet (20) is installed at the bottom end of the outer wall of the upper shell (2), and a cold medium outlet (21) is installed at the top end of the outer wall of the upper shell (2). A lower shell (3) is installed below the connecting cylinder (1). The lower shell (3) is sleeved outside a plurality of lower heat pipes (11). A heat medium outlet (31) is installed at the top end of the outer wall of the lower shell (3), and a heat medium inlet (30) is installed at the bottom end of the outer wall of the lower shell (3). A lead screw (35) is rotatably installed at the inner bottom of the lower shell (3). A disk body (36) is threadedly connected to the lead screw (35). A plurality of through holes (360) are formed in the disk body (36). A plurality of bristles (361) are fixed on the inner walls of the through holes (360). The lower heat pipes (11) pass through the corresponding through holes (360), and the ends of the bristles (361) are pressed against the outer walls of the lower heat pipes (11). A motor (33) for driving the lead screw (35) to rotate is installed at the bottom of the lower shell (3).

2. The enhanced heat transfer component of the large-scale heat pipe heat exchanger according to claim 1, wherein: An installation disk (10) is installed on the outer wall of the connecting cylinder (1). A plurality of connection holes are formed in the installation disk (10). A first flange (22) is coaxially fixed at the bottom end of the upper shell (2). A plurality of connection bolts (23) pass through the first flange (22). A second flange (34) is coaxially fixed at the top end of the lower shell (3). The connection bolts (23) pass through the first flange (22), the connection holes and the second flange (34), and nuts are threadedly connected to the ends of the connection bolts (23).

3. The enhanced heat transfer component of the large-scale heat pipe heat exchanger according to claim 1, wherein: The corrugated pipes (120) and the bent pipe (121) are of an integrally formed structure, and a plurality of upper heat pipes (12) are distributed at equal intervals in a ring shape.

4. The enhanced heat transfer component of the large-scale heat pipe heat exchanger according to claim 1, characterized in that: The overall shape of the corrugated pipe (120) is wavy, and the overall shape of the bent pipe (121) is arched.

5. The enhanced heat transfer component of the large heat pipe heat exchanger according to claim 2, characterized in that: Sealing grooves (101) are formed in both the upper and lower walls of the installation disk (10). Sealing rings (13) are inserted into the sealing grooves (101). Connection grooves are formed in two opposite end faces of the first flange (22) and the second flange (34), and the upper and lower sealing rings (13) are respectively inserted and matched with the connection grooves.

6. The enhanced heat transfer component of the large-scale heat pipe heat exchanger according to claim 1, wherein: A plurality of the lower heat pipes (11) are distributed at equal intervals in a ring shape, and the lower heat pipes (11) are straight pipes.

7. The enhanced heat transfer component of the large heat pipe heat exchanger according to claim 1, characterized in that: Two guiding grooves (362) are formed in the outer wall of the disk body (36). Guide rails (37) are fixed on both inner walls of the lower shell (3), and the guide rails (37) are slidably connected with the guiding grooves (362).

8. The enhanced heat transfer component of the large-scale heat pipe heat exchanger according to claim 1, characterized in that: The bottom of the lower housing (3) is fixedly connected by bolts at the outside of the motor (33) with a hollow protective cover (32), and a plurality of heat dissipation grooves (320) are formed in the outer wall of the protective cover (32).

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