Distributor structure

Abstract

The utility model relates to a distributor structure which comprises a tube plate and an upper sealing head, the top of the upper sealing head is provided with a medium inlet tube, a distributor is arranged above the tube plate, and the distributor comprises a lower distribution disc, a lower check ring, a plurality of first connecting assemblies, an upper distribution disc, an upper check ring and a plurality of second connecting assemblies. The lower distribution disc is installed on the pipe plate through a first connecting assembly, the upper distribution disc is installed on the lower distribution disc through a second connecting assembly, the bottom of the medium inlet pipe extends into the upper containing cavity, an anti-scour baffle is arranged at the bottom of the medium inlet pipe, upper distribution disc small holes are formed in the upper distribution disc, and lower distribution disc small holes are formed in the lower distribution disc. The lower distribution disc is provided with lower distribution disc small holes, the tube plate is provided with heat exchange tube holes, the free tail ends of the upper portions of the heat exchange tubes are welded in the heat exchange tube holes of the tube plate, the projections of the lower distribution disc small holes and the heat exchange tubes on the plane perpendicular to the central axis are arranged in the mode that six lower distribution disc small holes surround one heat exchange tube, and therefore media can be evenly distributed.

Description

[Technical Field]

[0001] This utility model relates to the field of heat exchangers, and in particular to a distributor structure. [Background Technology]

[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid; it is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food, and many other industrial production processes. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, and reboilers, etc.

[0003] Shell-and-tube heat exchangers mainly consist of a shell, tube bundle, tube sheet, and end caps. The shell is usually circular and contains parallel or spiral tube bundles, with both ends of the tube bundle fixed to the tube sheet. In a shell-and-tube heat exchanger, two fluids exchange heat: one flows inside the tubes (the tube side) and the other flows outside the tubes (the shell side). The walls of the tube bundle are the heat transfer surfaces.

[0004] Please see Figure 1 , Figure 1 In the existing shell-and-tube heat exchanger, the gas-liquid coexisting medium enters the device 2' from the upper inlet pipe 1', and then flows directly into the heat exchange tube for heat exchange after passing through the anti-impact baffle 3'. The defects of this structure are: 1. The medium is not evenly distributed after entering the heat exchange tube, which reduces the heat exchange efficiency. Therefore, we thought about how to make the medium enter the heat exchange tube evenly, and thus proposed the distributor structure in this application. [Utility Model Content]

[0005] To address the aforementioned problems, the purpose of this invention is to provide a distributor structure that enables uniform distribution of the medium.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a distributor structure, comprising: a tube sheet and an upper end cap, wherein the top of the upper end cap is provided with a medium inlet pipe, and a distributor is provided above the tube sheet. The distributor includes: a lower distribution plate, a lower retaining ring, a plurality of first connecting components, an upper distribution plate, an upper retaining ring, and a plurality of second connecting components. The lower retaining ring is welded to the lower distribution plate to form a lower receiving cavity. The lower distribution plate is installed on the tube sheet through a plurality of first connecting components. The first connecting components include: a first pull rod, a first spacer tube, and a first nut. The bottom of the first pull rod is welded to the tube sheet, and the first spacer tube is sleeved on the outside of the first pull rod. The lower distribution plate is provided with a first mounting hole for the first pull rod to pass through. The top of the first pull rod passes through the first mounting hole of the lower distribution plate and is fixed by the first nut. After installation, the lower distribution plate is supported on the first spacer tube. The upper retaining ring is welded to the upper distribution plate to form an upper receiving cavity. The upper distribution plate... The upper distribution plate is installed with several second connecting components, each including a second tie rod, a second spacer tube, and a second nut. The bottom of the second tie rod is welded to the lower distribution plate, and the second spacer tube is sleeved on the outside of the second tie rod. The upper distribution plate has a second mounting hole for the second tie rod to pass through. The top of the second tie rod passes through the second mounting hole of the upper distribution plate and is fixed by the second nut. After installation, the upper distribution plate is supported on the second spacer tube. The bottom of the medium inlet pipe extends into the upper receiving cavity, and the bottom of the medium inlet pipe is provided with an anti-impact baffle. The upper distribution plate has several small holes for the medium to pass through, and the lower distribution plate has several small holes for the medium to pass through. The tube sheet has several heat exchange tube holes, and the upper free end of the heat exchange tube is welded to the heat exchange tube hole of the tube sheet. The projection of the small holes of the lower distribution plate and the heat exchange tube on a plane perpendicular to the central axis is arranged such that six small holes of the lower distribution plate surround one heat exchange tube.

[0007] Preferably, the distributor structure of this utility model is further configured such that the plurality of small holes on the upper distribution plate are evenly arranged and the diameter of the small holes on the upper distribution plate is 8mm.

[0008] Preferably, one distributor structure of the present invention is further configured such that the diameter of the small hole in the lower distribution plate is 13mm.

[0009] Preferably, one distributor structure of the present invention is further configured such that a stiffening plate is provided below the lower distribution plate.

[0010] Preferably, the distributor structure of this utility model is further configured such that the lower distribution plate, the lower retaining ring, the plurality of first connecting components, the upper distribution plate, the upper retaining ring, and the plurality of second connecting components are all made of stainless steel.

[0011] Preferably, one distributor structure of the present invention is further configured such that the diameter of the upper retaining ring is smaller than the diameter of the lower retaining ring.

[0012] Preferably, one distributor structure of the present invention is further configured such that the height of the upper retaining ring is higher than the height of the lower retaining ring.

[0013] Preferably, one distributor structure of the present invention is further configured such that the first nut and the lower distribution plate are spot welded at three evenly distributed points.

[0014] Preferably, one distributor structure in this utility model is further configured such that the second nut and the upper distribution plate are spot welded at three evenly distributed points.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The distributor in the present invention has a simple structure and is easy to install. The medium enters the equipment through the medium inlet pipe above and first encounters the anti-impact baffle. The anti-impact baffle can prevent the medium from directly hitting the upper distribution plate, so that the medium can slowly fall onto the upper distribution plate. Since there are many small holes with a diameter of 8mm evenly distributed on the upper distribution plate, the medium can be evenly distributed, avoiding the formation of fluid vortices, and the medium can fall evenly onto the lower distribution plate. Since the projection of the small holes of the lower distribution plate and the heat exchange tube on the plane perpendicular to the central axis is six small holes of the lower distribution plate surrounding one heat exchange tube, the medium can fall evenly around the periphery of each heat exchange tube, avoiding the formation of steam drum. The medium is evenly distributed after entering the heat exchange tube, which improves the heat exchange efficiency. [Attached Image Description]

[0016] Figure 1 This is a schematic diagram of a structure in the prior art that does not include a distributor.

[0017] Figure 2 This is a schematic diagram of the distributor structure in this utility model.

[0018] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0019] Figure 4 for Figure 2 A magnified view of a section at point B.

[0020] Figure 5 This is a schematic diagram of the structure of the small holes in the upper distribution plate.

[0021] Figure 6 This is a schematic diagram of the lower distribution plate.

[0022] Figure 7 This is a schematic diagram of the projection structure of the small holes in the lower distribution plate and the heat exchange tubes on a plane perpendicular to the central axis.

[0023] Figure 1 In: 1`, inlet pipe; 2`, equipment; 3`, impact prevention baffle plate.

[0024] Figures 2 to 7 In: 1, tube sheet; 2, upper head; 3, medium inlet pipe; 4, distributor; 40, lower distribution plate; 400, first mounting hole; 41, lower retaining ring; 42, first connection assembly; 420, first pull rod; 421, first spacer tube; 422, first nut; 43, upper distribution plate; 44, upper retaining ring; 45, second connection assembly; 450, second pull rod; 451, second spacer tube; 452, second nut; 46, lower receiving cavity; 47, upper receiving cavity; 48, small holes on the upper distribution plate; 49, small holes on the lower distribution plate; 5, impact prevention baffle plate; 6, rib plate; 7, heat exchange tube.

Specific Embodiment

[0025] The following further describes in detail a distributor structure according to the present utility model through specific embodiments.

[0026] Refer Figures 2 to 7As shown, a distributor structure includes: a tube sheet 1 and an upper end cap 2. A medium inlet pipe 3 is provided at the top of the upper end cap 2. A distributor 4 is provided above the tube sheet 1. The distributor 4 includes: a lower distribution plate 40, a lower retaining ring 41, several first connecting components 42, an upper distribution plate 43, an upper retaining ring 44, and several second connecting components 45. The diameter of the upper retaining ring 44 is smaller than the diameter of the lower retaining ring 41, and the height of the upper retaining ring 44 is greater than the height of the lower retaining ring 41. In this embodiment, the lower distribution plate 40, the lower retaining ring 41, the several first connecting components 42, the upper distribution plate 43, the upper retaining ring 44, and the several second connecting components 45 are all made of stainless steel, thus possessing good corrosion resistance. The lower retaining ring 41 is welded to the lower distribution plate 40 to form a lower receiving cavity 46. The lower distribution plate 40 is mounted on the tube sheet 1 by a plurality of first connecting components 42. The first connecting components 42 include: a first pull rod 420, a first spacer tube 421 and a first nut 422. The bottom of the first pull rod 420 is welded to the tube sheet 1. The first spacer tube 421 is sleeved on the outside of the first pull rod 420. The lower distribution plate 40 is provided with a first mounting hole 400 for the first pull rod 420 to pass through. The top of the first pull rod 420 passes through the first mounting hole 400 of the lower distribution plate 40 and is fixed by the first nut 422. The first nut 422 and the lower distribution plate 40 are spot welded at three evenly distributed points. After installation, the lower distribution plate 40 is supported on the first spacer tube 421. The upper retaining ring 44 is welded to the upper distribution plate 43 to form the upper receiving cavity 47. The upper distribution plate 43 is installed on the lower distribution plate 40 through several second connecting components 45. The second connecting components 45 include: a second pull rod 450, a second spacer tube 451, and a second nut 452. The bottom of the second pull rod 450 is welded to the lower distribution plate 40. The second spacer tube 451 is sleeved on the outside of the second pull rod 450. The upper distribution plate 43 is provided with a second mounting hole (not shown) for the second pull rod 450 to pass through. The top of the second pull rod 450 passes through the second mounting hole of the upper distribution plate 43 and is fixed by the second nut 452. The second nut 452 and the upper distribution plate 43 are spot welded at three evenly distributed points. After installation, the upper distribution plate 43 is supported on the second spacer tube 451. The bottom of the medium inlet tube 3 extends into the upper receiving cavity 47, and an anti-impact baffle 5 is provided at the bottom of the medium inlet tube 3. The upper distribution plate 43 has several small holes 48 for the medium to pass through, which are evenly arranged and have a diameter of 8 mm. The lower distribution plate 40 has several small holes 49 for the medium to pass through, and the diameter of the small holes 49 is 13 mm. A stiffening plate 6 is provided below the lower distribution plate 40 to increase the structural strength of the lower distribution plate 40.The tube sheet 1 is provided with a number of heat exchange tube holes (not shown). The upper free end of the heat exchange tube 7 is welded to the heat exchange tube hole of the tube sheet 1. The projection of the lower distribution plate small hole 49 and the heat exchange tube 7 on the plane perpendicular to the central axis is arranged such that six lower distribution plate small holes 49 surround one heat exchange tube 7.

[0027] In summary, the distributor in this utility model has a simple structure and is easy to install. The medium enters the equipment through the upper medium inlet pipe 3 and first encounters the anti-impact baffle 5. The anti-impact baffle 5 can prevent the medium from directly hitting the upper distribution plate 43, so that the medium can slowly fall onto the upper distribution plate 43. Since there are many small holes with a diameter of 8mm evenly distributed on the upper distribution plate 43, the medium can be evenly distributed, avoiding the formation of fluid vortices, and the medium can fall evenly onto the lower distribution plate 40. Since the projection of the small holes 49 of the lower distribution plate and the heat exchange tube 7 on the plane perpendicular to the central axis is six small holes 49 of the lower distribution plate arranged around one heat exchange tube 7, the medium can fall evenly around the periphery of each heat exchange tube 7, avoiding the formation of steam drums. After the medium enters the heat exchange tube 7, it is evenly distributed, improving the heat exchange efficiency.

[0028] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A distributor structure comprising: The tube plate and the upper head, the top of the upper head is provided with a medium inlet pipe, characterized in that: the upper of the tube plate is provided with a distributor, the distributor comprises: a lower distribution disc, a lower retaining ring, a plurality of first connecting assemblies, an upper distribution disc, an upper retaining ring and a plurality of second connecting assemblies, the lower retaining ring is welded with the lower distribution disc to form a lower receiving cavity, the lower distribution disc is installed on the tube plate through a plurality of first connecting assemblies, the first connecting assembly comprises: a first pull rod, a first distance tube and a first nut, the bottom of the first pull rod is welded with the tube plate, the first distance tube is sleeved on the outside of the first pull rod, the lower distribution disc is provided with a first mounting hole for the first pull rod to pass through, the top of the first pull rod is fixed through the first nut after passing through the first mounting hole of the lower distribution disc, and the installed lower distribution disc is supported on the first distance tube, the upper retaining ring is welded with the upper distribution disc to form an upper receiving cavity, the upper distribution disc is installed on the lower distribution disc through a plurality of second connecting assemblies, the second connecting assembly comprises: a second pull rod, a second distance tube and a second nut, the bottom of the second pull rod is welded with the lower distribution disc, the second distance tube is sleeved on the outside of the second pull rod, the upper distribution disc is provided with a second mounting hole for the second pull rod to pass through, the top of the second pull rod is fixed through the second nut after passing through the second mounting hole of the upper distribution disc, and the installed upper distribution disc is supported on the second distance tube, the bottom of the medium inlet pipe extends into the upper receiving cavity, and the bottom of the medium inlet pipe is provided with a anti-collision baffle, a plurality of upper distribution disc small holes for the medium to pass through are arranged on the upper distribution disc, a plurality of lower distribution disc small holes for the medium to pass through are arranged on the lower distribution disc, a plurality of heat exchange tube holes are arranged on the tube plate, and the upper free end of the heat exchange tube is welded in the heat exchange tube hole of the tube plate, the projection of the lower distribution disc small hole and the heat exchange tube on the plane perpendicular to the central axis is arranged in six lower distribution disc small hole around one heat exchange tube.

2. A distributor structure as claimed in claim 1, characterized in that: The plurality of upper distribution disc small holes are uniformly arranged, and the diameter of the upper distribution disc small hole is 8mm.

3. A distributor structure as claimed in claim 1, characterized in that: The diameter of the lower distribution disc small hole is 13mm.

4. A distributor structure as claimed in claim 1, characterized in that: The lower of the lower distribution disc is provided with a rib plate.

5. A distributor structure as claimed in claim 1, characterized in that: The lower distribution disc, the lower retaining ring, the plurality of first connecting assemblies, the upper distribution disc, the upper retaining ring and the plurality of second connecting assemblies are all made of stainless steel material.

6. A distributor structure as claimed in claim 1, characterized in that: The diameter of the upper retaining ring is smaller than the diameter of the lower retaining ring.

7. A distributor structure as claimed in claim 1, characterized in that: The height of the upper retaining ring is higher than the height of the lower retaining ring.

8. A distributor structure as claimed in claim 1, characterized in that: The first nut and the lower distribution disc adopt three-point evenly distributed spot welding.

9. A distributor structure as claimed in claim 1, characterized in that: The second nut and the upper distribution disc adopt three-point evenly distributed spot welding.

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