Thermal shock resistant plate-fin heat exchanger

Abstract

The utility model relates to the technical field of fin heat exchangers, and discloses a thermal shock resistant plate-fin heat exchanger which comprises a heat exchanger body, the inlet end of the heat exchanger body is fixedly communicated with a hot medium inlet pipe and a cold medium inlet pipe respectively, and the outlet end of the heat exchanger body is fixedly communicated with a hot medium outlet pipe and a cold medium outlet pipe respectively. Buffer pipes are arranged on one side of the hot medium inlet pipe and one side of the cold medium inlet pipe, hemispherical sealing blocks are fixedly connected into the buffer pipes, first springs are fixedly connected to the outer surface of the bottom of a connecting disc, and a spherical blocking block is fixedly connected to the outer surface of the bottom of a blocking rod. The spherical blocking block is impacted by fluid, so that the first spring is compressed, the inflow hole is communicated, the first spring buffers the strong impact force of the fluid, the impact force of the impact force of the fluid on the plate bundle in the heat exchanger is reduced, the impact resistance is strong, and the service life of the heat exchanger is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fin-type heat exchangers, in particular to a heat shock resistant plate-fin heat exchanger. Background Art

[0002] Plate-fin heat exchangers typically consist of baffles, fins, seals, and guide vanes. Fins, guide vanes, and seals are placed between adjacent baffles to form a sandwich called a channel. These sandwiches are stacked according to the flow of fluids and brazed together to form a plate bundle, the core of the plate-fin heat exchanger. Plate-fin heat exchangers are widely used in industries such as petroleum, chemical, and natural gas processing.

[0003] An existing patent (publication number: CN215598180U) discloses a thermal shock-resistant plate-fin heat exchanger comprising a shell, a first end cap disposed on one sidewall of the shell, and a second end cap disposed on the other sidewall of the shell. The first end cap is provided with an air inlet pipe, and the second end cap is provided with an air outlet pipe, both of which are connected to the interior of the shell. The shell is provided with a core comprising a plurality of baffles, a plurality of straight fins, and a plurality of seals. The baffles are located within the shell, the straight fins are connected between adjacent baffles, the sidewalls of the straight fins are provided with a plurality of inlet holes, and seals are provided at both ends of the straight fins. This application has the effect of resisting thermal shock.

[0004] In the above-mentioned patented technology, the heat shock resistance of the straight fin is improved by opening an inflow hole on the side wall. However, in actual use, the inflow hole can play a partial buffering effect, but the buffering effect is limited. For some stronger impacts, there is still an impact risk to the heat exchanger, which affects the service life of the heat exchanger. Therefore, a heat shock resistant plate-fin heat exchanger is proposed. Utility Model Content

[0005] In view of the deficiencies of the prior art, the present invention provides a thermal shock resistant plate-fin heat exchanger to solve the problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a heat shock resistant plate-fin heat exchanger, comprising a heat exchanger body, the inlet end of the heat exchanger body being fixedly connected with a hot medium inlet pipe and a cold medium inlet pipe, the outlet end of the heat exchanger body being fixedly connected with a hot medium discharge pipe and a cold medium discharge pipe, a buffer tube being provided on one side of the hot medium inlet pipe and the cold medium inlet pipe, the interior of the buffer tube being fixedly connected with a hemispherical closing block, the outer surface of the hemispherical closing block being provided with an inflow hole, the interior of the buffer tube being fixedly connected with a connecting disk, the bottom outer surface of the connecting disk being fixedly connected with a first spring, the bottom outer surface of the first spring being fixedly connected with a blocking rod, and the bottom outer surface of the blocking rod being fixedly connected with a spherical blocking block.

[0007] Furthermore, connecting pipes are provided between the hot medium inlet pipe and the cold medium inlet pipe and the two buffer pipes respectively, and mounting rings are provided inside the connecting pipes. A buffer pad is installed inside the mounting ring, and a plurality of through holes are opened on the outer surface of the buffer pad.

[0008] Furthermore, a plurality of fixing rings arranged in a circumferential array are fixedly connected to the inner wall of the connecting pipe, a connecting ring is provided outside the fixing ring, and a second spring is fixedly connected between the connecting ring and the mounting ring.

[0009] Furthermore, the outer surface of the connecting plate is provided with a plurality of through grooves in a circumferential array.

[0010] Furthermore, a movable rod is movably inserted into the outer surface of the connecting disk, the bottom of the movable rod is fixedly connected to the blocking rod, and the first spring is sleeved on the outer surface of the movable rod.

[0011] Furthermore, the front sides of the hot medium inlet pipe, the cold medium inlet pipe, both ends of the connecting pipe and the rear side of the buffer pipe are all provided with first flanges, and the front side of the buffer pipe is provided with a second flange.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This heat-shock-resistant plate-fin heat exchanger uses the fluid to impact the spherical block, causing the first spring to compress and the inflow hole to be connected. The first spring buffers the strong fluid impact force, reducing the impact force of the fluid on the plate bundle inside the heat exchanger. It also has strong impact resistance and increases the service life of the heat exchanger. When the fluid is stopped, the first spring drives the spherical block to reset, so that the spherical block blocks the inflow hole to prevent backflow.

[0014] 2. In this thermal shock resistant plate-fin heat exchanger, after the fluid is initially buffered, it passes through the buffer pad and slowly enters the interior of the heat exchanger body through the through hole in the buffer pad. The second spring cooperates with the fluid to perform secondary buffering, further reducing the impact force of the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the buffer tube of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the connecting pipe of the utility model;

[0018] Figure 4 For this utility model Figure 3Enlarged structural diagram at point A in the middle.

[0019] In the figure: 1. Heat exchanger body; 2. Hot medium inlet pipe; 3. Cold medium inlet pipe; 4. Hot medium discharge pipe; 5. Cold medium discharge pipe; 6. Hemispherical closing block; 7. Connecting plate; 8. First spring; 9. Blocking rod; 10. Spherical blocking block; 11. Inflow hole; 12. Buffer pad; 13. Fixing ring; 14. Connecting ring; 15. Second spring; 16. Connecting pipe; 17. Buffer pipe; 18. First flange; 19. Second flange; 20. Mounting ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0021] Example 1:

[0022] Please refer to Figures 1-4 The utility model provides a technical solution: a heat shock resistant plate-fin heat exchanger, comprising a heat exchanger body 1, the inlet end of the heat exchanger body 1 is fixedly connected with a hot medium inlet pipe 2 and a cold medium inlet pipe 3, the outlet end of the heat exchanger body 1 is fixedly connected with a hot medium discharge pipe 4 and a cold medium discharge pipe 5, a buffer pipe 17 is provided on one side of the hot medium inlet pipe 2 and the cold medium inlet pipe 3, the interior of the buffer pipe 17 is fixedly connected with a hemispherical closing block 6, the outer surface of the hemispherical closing block 6 is provided with an inflow hole 11, the interior of the buffer pipe 17 is fixedly connected with a connecting disk 7, the bottom outer surface of the connecting disk 7 is fixedly connected with a first spring 8, the bottom outer surface of the first spring 8 is fixedly connected with a blocking rod 9, the bottom outer surface of the blocking rod 9 is fixedly connected with Spherical block 10, specifically, the hot medium enters the interior of the heat exchanger body 1 through the hot medium inlet pipe 2, and the cold medium enters the interior of the heat exchanger body 1 through the cold medium inlet pipe 3. When the hot medium enters, the impact force of the fluid impacts the spherical block 10, and the spherical block 10 drives the blocking rod 9 to move upward, and compresses the first spring 8, and the inflow hole 11 is connected. The fluid enters through the inflow hole 11, and the first spring 8 buffers the strong fluid impact force, reducing the impact force of the fluid on the internal plate bundle of the heat exchanger, and has strong impact resistance, thereby improving the service life of the heat exchanger. When the fluid delivery stops, the first spring 8 drives the spherical block 10 to reset, so that the spherical block 10 blocks and closes the inflow hole 11 to avoid backflow.

[0023] In this embodiment, a connecting pipe 16 is provided between the hot medium inlet pipe 2 and the cold medium inlet pipe 3 and the two buffer pipes 17 respectively. A mounting ring 20 is provided inside the connecting pipe 16, and a buffer pad 12 is installed inside the mounting ring 20. The outer surface of the buffer pad 12 is provided with a plurality of through holes. Specifically, after the impact force of the fluid is initially buffered, it passes through the buffer pad 12 and slowly enters the interior of the heat exchanger body 1 through the through holes on the surface of the buffer pad 12.

[0024] In this embodiment, the inner wall of the connecting tube 16 is fixedly connected to a plurality of fixing rings 13 arranged in a circumferential array, a connecting ring 14 is provided on the outside of the fixing ring 13, and a second spring 15 is fixedly connected between the connecting ring 14 and the mounting ring 20. Specifically, when the fluid impact buffer pad 12 is subjected to the impact force of the fluid, the second spring 15 is compressed, and the impact force is further buffered by the second spring 15.

[0025] In this embodiment, a plurality of through grooves are formed in a circumferential array on the outer surface of the connection disk 7 . Specifically, the through grooves provide space for the fluid on the connection disk 7 to flow out.

[0026] In this embodiment, a movable rod is movably inserted into the outer surface of the connecting disk 7, the bottom of the movable rod is fixedly connected to the blocking rod 9, and the first spring 8 is sleeved on the outer surface of the movable rod. Specifically, when the fluid impacts the spherical blockage 10, the movable rod slides on the surface of the connecting disk 7, so that the spherical blockage 10 moves stably in a straight line. When the first spring 8 is reset, the spherical blockage 10 can block the inflow hole 11, and the first spring 8 is limited by the movable rod to avoid tilting deformation of the first spring 8.

[0027] In this embodiment, first flanges 18 are provided on the front sides of the hot medium inlet pipe 2 and the cold medium inlet pipe 3, on both ends of the connecting pipe 16, and on the rear side of the buffer pipe 17. A second flange 19 is provided on the front side of the buffer pipe 17. Specifically, the hot medium inlet pipe 2, the cold medium inlet pipe 3, the connecting pipe 16, and the buffer pipe 17 are connected via the first flange 18, and are connected to the external fluid delivery pipe via the second flange 19.

[0028] Working principle: When the present invention is in use, the hot medium enters the interior of the heat exchanger body 1 through the hot medium inlet pipe 2, and the cold medium enters the interior of the heat exchanger body 1 through the cold medium inlet pipe 3. When the hot medium enters, the impact force of the fluid impacts the spherical blockage 10, and the spherical blockage 10 drives the blocking rod 9 to move upward, and compresses the first spring 8, and the inflow hole 11 is connected. The fluid enters through the inflow hole 11, and the first spring 8 buffers the stronger fluid impact force, reducing the impact force of the fluid on the internal plate bundle of the heat exchanger, and has strong impact resistance, thereby improving the service life of the heat exchanger. When the fluid delivery stops, the first spring 8 drives the spherical blockage 10 to reset, so that the spherical blockage 10 blocks and seals the inflow hole 11 to avoid backflow.

[0029] After the impact force of the fluid is initially buffered, it passes through the buffer pad 12 and slowly enters the interior of the heat exchanger body 1 through the through holes on the surface of the buffer pad 12. When the fluid passes through the buffer pad 12, the second spring 15 is deformed, and the deformation of the second spring 15 and the buffer pad 12 buffer the impact force of the fluid again, thereby reducing the impact force of the fluid again.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat shock resistant plate-fin heat exchanger, comprising a heat exchanger body (1), characterized in that: The inlet end of the heat exchanger body (1) is fixedly connected to a hot medium inlet pipe (2) and a cold medium inlet pipe (3), and the outlet end of the heat exchanger body (1) is fixedly connected to a hot medium discharge pipe (4) and a cold medium discharge pipe (5). A buffer pipe (17) is provided on one side of each of the hot medium inlet pipe (2) and the cold medium inlet pipe (3). The interior of the buffer pipe (17) is fixedly connected to a hemispherical closing block (6). The outer surface of the hemispherical closing block (6) is provided with an inflow hole (11). The interior of the buffer pipe (17) is fixedly connected to a connecting plate (7). The bottom outer surface of the connecting plate (7) is fixedly connected to a first spring (8). The bottom outer surface of the first spring (8) is fixedly connected to a blocking rod (9). The bottom outer surface of the blocking rod (9) is fixedly connected to a spherical blocking block (10).

2. The thermal shock resistant plate-fin heat exchanger according to claim 1, characterized in that: A connecting pipe (16) is provided between the hot medium inlet pipe (2) and the cold medium inlet pipe (3) and the two buffer pipes (17), respectively; a mounting ring (20) is provided inside the connecting pipe (16); a buffer pad (12) is installed inside the mounting ring (20); and a plurality of through holes are provided on the outer surface of the buffer pad (12).

3. The thermal shock resistant plate-fin heat exchanger according to claim 2, characterized in that: The inner wall of the connecting tube (16) is fixedly connected to a plurality of fixing rings (13) arranged in a circumferential array, a connecting ring (14) is arranged outside the fixing ring (13), and a second spring (15) is fixedly connected between the connecting ring (14) and the mounting ring (20).

4. The thermal shock resistant plate-fin heat exchanger according to claim 1, characterized in that: The outer surface of the connecting disk (7) is provided with a plurality of through grooves in a circumferential array.

5. The thermal shock resistant plate-fin heat exchanger according to claim 1, characterized in that: A movable rod is movably inserted into the outer surface of the connecting disk (7), the bottom of the movable rod is fixedly connected to the blocking rod (9), and the first spring (8) is sleeved on the outer surface of the movable rod.

6. The thermal shock resistant plate-fin heat exchanger according to claim 2, characterized in that: The front sides of the hot medium inlet pipe (2), the cold medium inlet pipe (3), both ends of the connecting pipe (16) and the rear side of the buffer pipe (17) are all provided with a first flange (18), and the front side of the buffer pipe (17) is provided with a second flange (19).

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