CN213515189U - High-temperature heat protection structure of heat exchanger - Google Patents
High-temperature heat protection structure of heat exchanger Download PDFInfo
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- CN213515189U CN213515189U CN202022201488.8U CN202022201488U CN213515189U CN 213515189 U CN213515189 U CN 213515189U CN 202022201488 U CN202022201488 U CN 202022201488U CN 213515189 U CN213515189 U CN 213515189U
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- heat exchange
- tube
- protection structure
- heat exchanger
- exchange tube
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Abstract
The utility model relates to a high temperature thermal protection structure of heat exchanger, including flexible tube sheet, heat exchange tube, corundum pouring material and protective case, the tip and the flexible tube sheet of heat exchange tube are fixed, protective case includes the straight tube, the outer end of straight tube is equipped with the turn-ups of evagination, and the inner inserts in the heat exchange tube, the corundum pouring material waters and establishes the part that exposes the heat exchange tube at protective case, the turn-ups is perpendicular with the straight tube, corundum pouring material surface is equipped with and holds turn-ups recess. The utility model discloses make the turn-ups of taking the hexagon with protective case's head, the crisscross protective surface that forms honeycomb structure that sets up of hexagonal turn-ups is protected the corundum pouring material, has saved the backplate, has reduced the heat altered shape between flexible tube sheet and the heat exchange tube greatly, the better demand that satisfies production.
Description
Technical Field
The utility model relates to a waste heat boiler technical field, concretely relates to hot protective structure of high temperature of heat exchanger.
Background
The heat exchanger is widely applied to the field of waste heat boilers and is used for transferring high-temperature flue gas. In order to prevent the direct contact of high temperature flue gas and tube sheet welded heat exchange tube head, avoid the welding seam inefficacy of tube sheet and heat exchange tube to leak, protective case is installed at the high temperature flue gas entry end of heat exchange tube usually, and protective case need receive 800~1300 ℃ high temperature flue gas and directly erode, and the environment is extremely abominable. The high-temperature thermal protection structure in the prior art is shown in fig. 1 and comprises a flexible tube plate 1, a heat exchange tube 2, corundum castable 3, a protective sleeve 4 and a protection plate 6, wherein the protective sleeve 4 is made of a metal material, and the corundum castable 3 is arranged on the surface of the tube plate on the high-temperature flue gas inlet side and used for preventing flue gas from directly contacting the flexible tube plate. And because the heat exchange tubes are densely arranged, the contact area between the corundum castable and the flexible tube plate is limited, and the corundum castable is easy to crack and fall off under the long-term direct brushing of high-temperature flue gas, so that the high-temperature flue gas flows to the surface of the tube plate and damages the tube plate. Therefore, the protective plate 6 made of high nickel-chromium alloy is arranged on the outer surface of the corundum castable 3, the protective plate 6 is sleeved at the head of each protective sleeve, but the protective plate 6 made of high nickel-chromium alloy is easy to deform and expand under high-temperature fluctuation, particularly, the expansion amount of the protective plate of equipment with a large diameter is large, and the protective sleeve is pulled by large expansion deformation to influence the normal use of the protective sleeve.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned not enough, provide a high temperature thermal protection structure of heat exchanger, the utility model discloses make protective case's head take hexagonal turn-ups, hexagonal turn-ups is crisscross to be set up the protective surface that forms honeycomb, protects the corundum pouring material, has saved the backplate, has reduced the heat altered shape between flexible tube sheet and the heat exchange tube greatly, the better demand that satisfies production.
The purpose of the utility model is realized like this:
the utility model provides a high temperature thermal protection structure of heat exchanger, includes flexible tube sheet, heat exchange tube, corundum pouring material and protective case, the tip and the flexible tube sheet of heat exchange tube are fixed, protective case includes the straight tube, the outer end of straight tube is equipped with the turn-ups of evagination, and the inner inserts in the heat exchange tube, the corundum pouring material waters and establishes the part that exposes the heat exchange tube at protective case, the turn-ups is perpendicular with the straight tube, corundum pouring material surface is equipped with the recess that holds the turn-ups.
Preferably, the heat exchange tube is equipped with a plurality ofly, and a plurality of heat exchange tubes are crisscross to be set up, protective case and heat exchange tube one-to-one.
Preferably, the flanging is hexagonal, and the flanging of the plurality of protective sleeves is staggered to form a protective surface with a honeycomb structure.
Preferably, an expansion gap is arranged between the two adjacent flanges.
Preferably, the expansion gap is a, a being 1-2 mm.
Preferably, the outer surface of the flanging is flush with the outer surface of the corundum castable material.
Preferably, the middle part of the straight pipe is provided with a boss, a ceramic fiber pad is arranged between the end part of the heat exchange pipe and the boss, and the ceramic fiber pad is sleeved on the straight pipe.
The utility model has the advantages that:
the utility model discloses make the turn-ups of taking the hexagon with protective case's head, the crisscross protective surface that forms honeycomb structure that sets up of hexagonal turn-ups is protected the corundum pouring material, has saved the backplate, has reduced the heat altered shape between flexible tube sheet and the heat exchange tube greatly, the better demand that satisfies production.
Drawings
Fig. 1 shows a high-temperature thermal protection structure of a heat exchanger in the prior art.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is a schematic structural view of the protection sleeve of the present invention.
Wherein: a flexible tube sheet 1; a heat exchange pipe 2; corundum castable 3; a protective sleeve 4; a straight pipe 4.1; flanging 4.2; 4.3 of a boss; a ceramic fiber mat 5; and a shield 6.
Detailed Description
Referring to fig. 2-4, the utility model relates to a high temperature thermal protection structure of heat exchanger, including flexible tube sheet 1, heat exchange tube 2, corundum pouring material 3 and protective case 4, the tip of heat exchange tube 2 stretches into behind the flexible tube sheet fixed with flexible tube sheet 1, flexible tube sheet 1 is close to a side surface of corundum pouring material 3 and flushes with the tip of heat exchange tube 2, protective case 4 includes straight tube 4.1, the outer end of straight tube 4.1 is equipped with the turn-ups 4.2 of evagination, and the inner inserts in heat exchange tube 2, corundum pouring material 3 waters and establishes the part that exposes heat exchange tube 2 at protective case 4, turn-ups 4.2 are perpendicular with straight tube 4.1, 3 surfaces of corundum pouring material are equipped with the recess that holds turn-ups 4.2.
The heat exchange tubes 2 are provided with a plurality of heat exchange tubes 2 which are arranged in a staggered mode, and the protective sleeves 4 correspond to the heat exchange tubes 2 one to one.
The turned edges 4.2 are hexagonal, and the turned edges 4.2 of the protective sleeves are arranged in a staggered mode to form a protective surface with a honeycomb structure.
An expansion gap is arranged between the two adjacent flanges 4.2. The expansion gap is a, and a is 1-2 mm. An expansion gap is reserved for the head of the protective sleeve, so that the head of the protective sleeve is prevented from being crushed by extrusion.
The outer surface of the flanging 4.2 is flush with the outer surface of the corundum castable 3.
The middle part of the straight tube 4.1 is provided with a boss 4.3, the boss 4.3 plays a good role in positioning, the protection sleeve 2 is prevented from falling off from the heat exchange tube 3, a ceramic fiber pad 5 is arranged between the end part of the heat exchange tube 2 and the boss 4.3, and the straight tube 4.1 is sleeved with the ceramic fiber pad 5.
The straight pipe 4.1, the flanging 4.2 and the boss 4.3 are made of corundum materials which are integrally formed. Has a relatively small thermal conductivity compared to metallic materials. During manufacturing, the joint of the flanging 4.2 and the straight pipe 4.1 is made into circular arc transition, the wall thickness is uniformly changed, and stress concentration is prevented.
Because the external diameter of protective case 2 is less than the internal diameter of heat exchange tube, so protective case just can insert the heat exchange tube smoothly, has the clearance like this between protective case 2 outer wall and the heat exchange tube inner wall, packs ceramic fiber paper 7 in the clearance of protective case and heat exchange tube.
Because the protective sleeve 2, the ceramic fiber pad 5 and the ceramic fiber paper 7 are all excellent heat insulation materials, the heat conduction coefficient is low, the high temperature at the joint of the tube head and the tube plate of the heat exchange tube can be effectively prevented, the heat transfer at the joint can be prevented, and the service life of the equipment can be prolonged; the head of the protective sleeve is made into a hexagonal flanging, and the hexagonal flanging is arranged in a staggered mode to form a honeycomb-structure protective surface for protecting the corundum castable. The thermal deformation between the flexible tube plate and the heat exchange tube is greatly reduced, and the production requirement is better met.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides a high temperature thermal protection structure of heat exchanger, includes flexible tube sheet (1), heat exchange tube (2), corundum pouring material (3) and protective case (4), the tip and the flexible tube sheet (1) of heat exchange tube (2) are fixed, its characterized in that: the protective sleeve (4) comprises a straight pipe (4.1), the outer end of the straight pipe (4.1) is provided with a convex flanging (4.2), the inner end of the straight pipe is inserted into the heat exchange pipe (2), the corundum castable (3) is poured on the part, exposed out of the heat exchange pipe (2), of the protective sleeve (4), the flanging (4.2) is perpendicular to the straight pipe (4.1), and the outer surface of the corundum castable (3) is provided with a groove for accommodating the flanging (4.2).
2. A high temperature thermal protection structure of a heat exchanger according to claim 1, wherein: the heat exchange tubes (2) are arranged in a plurality of staggered modes, and the protective sleeves (4) correspond to the heat exchange tubes (2) one to one.
3. A high-temperature thermal protection structure of a heat exchanger according to claim 1 or 2, characterized in that: the turned edges (4.2) are hexagonal, and the turned edges (4.2) of the protective sleeves are arranged in a staggered mode to form a protective surface with a honeycomb structure.
4. A high temperature thermal protection structure of a heat exchanger according to claim 3, wherein: an expansion gap is arranged between the two adjacent flanges (4.2).
5. The high-temperature thermal protection structure of a heat exchanger according to claim 4, wherein: the expansion gap is a, and a is 1-2 mm.
6. A high temperature thermal protection structure of a heat exchanger according to claim 1, wherein: the outer surface of the flanging (4.2) is flush with the outer surface of the corundum castable (3).
7. A high temperature thermal protection structure of a heat exchanger according to claim 1, wherein: the heat exchange tube is characterized in that a boss (4.3) is arranged in the middle of the straight tube (4.1), a ceramic fiber pad (5) is arranged between the end of the heat exchange tube (2) and the boss (4.3), and the straight tube (4.1) is sleeved with the ceramic fiber pad (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022201488.8U CN213515189U (en) | 2020-09-30 | 2020-09-30 | High-temperature heat protection structure of heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022201488.8U CN213515189U (en) | 2020-09-30 | 2020-09-30 | High-temperature heat protection structure of heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213515189U true CN213515189U (en) | 2021-06-22 |
Family
ID=76464228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022201488.8U Active CN213515189U (en) | 2020-09-30 | 2020-09-30 | High-temperature heat protection structure of heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213515189U (en) |
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2020
- 2020-09-30 CN CN202022201488.8U patent/CN213515189U/en active Active
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: High temperature thermal protection structure of heat exchanger Effective date of registration: 20220928 Granted publication date: 20210622 Pledgee: Jiangsu Jiangyin Rural Commercial Bank Co.,Ltd. Xinqiao sub branch Pledgor: JIANGSU YANXIN SCI-TECH Co.,Ltd. Registration number: Y2022320010556 |