CN213983519U - Connecting structure of flexible tube plate and central tube of waste heat boiler - Google Patents
Connecting structure of flexible tube plate and central tube of waste heat boiler Download PDFInfo
- Publication number
- CN213983519U CN213983519U CN202022658378.4U CN202022658378U CN213983519U CN 213983519 U CN213983519 U CN 213983519U CN 202022658378 U CN202022658378 U CN 202022658378U CN 213983519 U CN213983519 U CN 213983519U
- Authority
- CN
- China
- Prior art keywords
- tube
- boss
- waste heat
- heat boiler
- plate body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The utility model relates to a waste heat boiler's tube sheet structure discloses a connection structure of waste heat boiler's flexible tube sheet and center tube of easily making, the structure includes the tube sheet body, and the centre bore of tube sheet body is used for being connected with the center tube, one side of centre bore butt joint center tube is equipped with the boss with tube sheet body integrated into one piece, and the boss keeps unanimous with the inside and outside diameter of center tube, and the boss is connected with butt weld with the center tube, and the height of boss is not less than butt weld's the distance of detecting a flaw. The utility model discloses well tube sheet adopts the outer groove welded structure of boss butt joint with being connected of center tube, and welding and nondestructive test are convenient for, guarantee welding quality, convenient processing.
Description
Technical Field
The utility model relates to a structure of flexible tube sheet on waste heat boiler.
Background
With the rapid development of the coal chemical industry in China, the demand of the methanation waste heat boiler in the field of the coal chemical industry is more and more increased, but the medium of the methanation waste heat boiler has strong hydrogen corrosion and erosion of metal powder, and the tube shell pass of the waste heat boiler has larger pressure difference and temperature difference, so that the tube plate of the waste heat boiler has larger temperature difference pressure. Due to high pressure difference and high temperature difference of the tube shell side, the design of a common tube plate can generate large thermal stress, and the tube plate of the waste heat boiler, particularly the tube plate of the inlet can generate large thermal stress under high temperature and high pressure. As a result, flexible or flexile tube sheets have found greater use in waste heat boilers.
For example, in the chinese utility model patent "welding structure of waste heat boiler" in 2020, 9, 8 days grant bulletin, the grant bulletin number is CN211450862U, the inner end face of the flexible tube plate is provided with a groove, the groove is provided with a boss corresponding to the central tube, the boss is provided with an inner hole, and the inner hole of the boss and the central tube are welded by adopting a deep inner hole.
However, deep bore welding requires special welding equipment and further improvement is required.
SUMMERY OF THE UTILITY MODEL
For reducing the processing cost, the utility model aims to solve the technical problem that a connection structure of flexible tube sheet and center tube of waste heat boiler of easily making is provided.
The utility model provides a technical scheme that its technical problem adopted is: the connection structure of the flexible tube plate and the central tube of the waste heat boiler comprises a tube plate body, wherein a central hole of the tube plate body is used for being connected with the central tube, a boss which is integrally formed with the tube plate body is arranged on one side of the central hole, which is in butt joint with the central tube, the boss is consistent with the inner diameter and the outer diameter of the central tube, and the boss is connected with the central tube through a butt welding seam. The utility model discloses well tube sheet adopts the boss butt joint with being connected of center tube, and outer notch welded structure is convenient for weld and nondestructive test, guarantees welding quality, has also avoided traditional bayonet tube head to weld professional equipment in the stress concentration of tube sheet surface department form simultaneously yet.
The height of the boss is not less than the flaw detection distance of the butt welding seam, and under the condition, the height of the boss is required to be as low as possible so as to reduce the maximum thickness of the tube plate, facilitate the forging of the tube plate, ensure the product quality and reduce the cost.
The peripheral surface of boss and tube sheet body between circular arc transition to reduce the local stress around the boss, improve life.
The edge of tube sheet body is the transition part of being connected with the barrel, the transition part includes the first barrel linkage segment of internal diameter such as the same thickness with the tube case barrel and the second barrel linkage segment of internal diameter such as the same thickness with the shell side barrel, and first barrel linkage segment and second barrel linkage segment all are connected with the tube sheet body through the toper changeover portion, the first fillet of right angle chamfer is connected between toper changeover portion and the first barrel linkage segment, the obtuse angle chamfer second fillet is connected between toper changeover portion and the second barrel linkage segment, and the one side of toper changeover portion towards the tube case barrel is coplanar with tube sheet body surface, and the one side of toper changeover portion face towards the shell side barrel is connected with the obtuse angle chamfer third fillet between tube sheet body surface, just the radius of third fillet is the biggest.
The height of the boss is smaller than the distance between the end face of the second cylinder connecting section and the surface of the tube plate body facing the shell pass cylinder.
The utility model has the advantages that: the sealing performance and the connection strength of the joint of the central tube and the tube plate are ensured, and the processing is convenient.
Drawings
Fig. 1 is a schematic diagram of the tube sheet structure of the present invention.
Fig. 2 is a partially enlarged view of a portion K of the welding portion in fig. 1.
Fig. 3 is a partially enlarged view of a portion J in fig. 1.
Labeled as: 1-butt weld, 2-center hole, 3-center tube, 4-boss, 5-tube plate body, 6-arc transition section, 7-transition part, 8-tube box cylinder, 9-shell pass cylinder, 71-first cylinder connecting section, 72-second cylinder connecting section, 73-taper transition section, H-boss height, H-spacing, alpha-taper, R1-radius of first fillet, R2-radius of second fillet, R3-radius of third fillet.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the flexible tube sheet of a certain high-temperature high-pressure methanation waste heat boiler adopts the utility model discloses a connection structure of waste heat boiler's flexible tube sheet and center tube, the tube sheet is the plectane roughly, and the centre bore 2 of tube sheet body 5 is used for being connected with center tube 3, one side of 2 butt joint center tubes of centre bore is equipped with the boss 4 with 5 integrated into one piece of tube sheet body, and boss 4 keeps unanimous with the inside and outside diameter of center tube 3, and boss 4 is connected with butt weld 1 with center tube 3, and boss 4 highly is not less than the distance of detecting a flaw of butt weld 1, its outer groove welded structure be convenient for welding and nondestructive test, guarantee welding quality, and easily processing has reduced the processing degree of difficulty that tube sheet and center tube are connected when keeping thin tube sheet adaptation temperature difference stress advantage.
As shown in fig. 1 and 3, the tube plate body 5 edge and cylinder connecting portion is a transition portion 7, the transition portion 7 includes a first cylinder connecting section 71 having the same thickness and the same inner diameter as the tube box cylinder 8 and a second cylinder connecting section 72 having the same thickness and the same inner diameter as the shell-side cylinder 9, the first cylinder connecting section 71 and the second cylinder connecting section 72 are both connected with the tube plate body 5 through a tapered transition section 73, the tapered transition section 73 is connected with the first cylinder connecting section 71 through a right-angled first fillet, the tapered transition section 73 is connected with the second cylinder connecting section 72 through an obtuse-angled second fillet, one side of the tapered transition section 73 facing the tube box cylinder 8 is coplanar with the tube plate body 5 surface, one side of the tapered transition section 73 facing the shell-side cylinder 9 is connected with the tube plate body 5 surface through an obtuse-angled third fillet, and of the three fillets, the radius R3 of the third fillet is the largest, the taper of the tapered transition section 33 facing the shell-side cylinder 2 is α, the wall thickness gradually changing along the radial direction and outwards gradually increasing is used for responding to the temperature difference stress, and the device has the advantages of simple structure, easiness in manufacturing, high strength, safety and reliability.
As shown in fig. 1, the height H of the boss 4 is smaller than the distance H between the end surface of the second cylinder connecting section 72 and the surface of the tube plate body 5 facing the shell-side cylinder 9, the maximum thickness of the tube plate is not increased by arranging the boss 4, the manufacturing cost of the tube plate is not increased, the peripheral surface of the boss 4 and the tube plate body 5 are in arc transition, the local stress around the boss 4 is reduced, and the connection structure of the flexible tube plate and the central tube of the waste heat boiler formed by the method has good reliability.
Claims (5)
1. The connection structure of the flexible tube plate and the central tube of the waste heat boiler comprises a tube plate body (5), wherein a central hole (2) of the tube plate body (5) is used for being connected with the central tube (3), and the connection structure is characterized in that: one side of the central tube butted with the central hole (2) is provided with a boss (4) integrally formed with the tube plate body (5), the inner diameter and the outer diameter of the boss (4) and the central tube (3) are kept consistent, and the boss (4) and the central tube (3) are connected through a butt welding seam (1).
2. The waste heat boiler flexible tube sheet to center tube connection as set forth in claim 1, wherein: the height (h) of the boss (4) is not less than the flaw detection distance of the butt weld (1).
3. The waste heat boiler flexible tube sheet to center tube connection as set forth in claim 1, wherein: and the peripheral surface of the boss (4) and the surface of the tube plate body (5) are in arc transition.
4. The waste heat boiler flexible tube sheet to center tube connection as set forth in claim 1, wherein: the edge of the tube plate body (5) is a transition part (7) connected with the tube body, the transition part (7) comprises a first tube body connecting section (71) which is as thick as the tube box tube body (8) and has the same inner diameter and a second tube body connecting section (72) which is as thick as the shell pass tube body (9) and has the same inner diameter, the first tube body connecting section (71) and the second tube body connecting section (72) are both connected with the tube plate body (5) through a conical transition section (77), the conical transition section (77) is connected with the first tube body connecting section (71) through a right-angled inverted first fillet, the conical transition section (77) is connected with the second tube body connecting section (72) through an obtuse-angled inverted second fillet, one surface of the conical transition section (77) facing the tube box tube body (8) is coplanar with the surface of the tube plate body (5), one surface of the conical transition section (77) facing the shell pass tube body (9) is connected with the obtuse-angled inverted third fillet, and the radius (R3) of the third fillet is the largest among the three fillet chamfers.
5. The waste heat boiler flexible tube sheet to center tube connection as set forth in claim 4, wherein: the height (H) of the boss (4) is smaller than the distance (H) between the end face of the second cylinder connecting section (72) and the surface of the tube plate body (5) facing the shell side cylinder (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022658378.4U CN213983519U (en) | 2020-11-17 | 2020-11-17 | Connecting structure of flexible tube plate and central tube of waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022658378.4U CN213983519U (en) | 2020-11-17 | 2020-11-17 | Connecting structure of flexible tube plate and central tube of waste heat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213983519U true CN213983519U (en) | 2021-08-17 |
Family
ID=77264311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022658378.4U Active CN213983519U (en) | 2020-11-17 | 2020-11-17 | Connecting structure of flexible tube plate and central tube of waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213983519U (en) |
-
2020
- 2020-11-17 CN CN202022658378.4U patent/CN213983519U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203298648U (en) | Polytetrafluoroethylene tube type air preheater | |
| CN102967169B (en) | A kind of exchanger tubes and tubesheets attachment structure preventing shell side side clearance from corroding | |
| CN213983519U (en) | Connecting structure of flexible tube plate and central tube of waste heat boiler | |
| CN213983518U (en) | Flexible tube plate of waste heat boiler | |
| CN110697653A (en) | Safety structure for improving reliability of high-temperature collecting furnace tube and operation method | |
| CN211716538U (en) | Pressure measuring port structure | |
| CN210070680U (en) | Central tube structure of spiral plate heat exchanger | |
| CN201021744Y (en) | A sealing steel ring for steel sealing | |
| CN205504250U (en) | Double -deck leak -proof structure that follow -on zirconium or titanium metal clad sheet equipment were taken over | |
| CN208214619U (en) | One kind is from centering backside gas shield jig | |
| CN211716012U (en) | Novel expansion joint draft tube is imported and exported to flue gas turbine | |
| CN218883674U (en) | Vacuum pipeline transition heat bridge structure | |
| CN218879962U (en) | Sublance for steelmaking converter | |
| CN211175777U (en) | Integral forming connection structure for pipe end of gas transfer pipe | |
| CN215371454U (en) | Screwed joint and pipeline connecting structure | |
| CN219755624U (en) | Self-centering pipeline joint connecting mechanism | |
| CN217208440U (en) | H-shaped forge piece and skirt structure thereof | |
| CN118149185A (en) | Coil pipe joint structure suitable for high-temperature medium | |
| CN216050074U (en) | Energy-saving integrated intelligent differential pressure flowmeter | |
| CN111702298B (en) | Double-side welding method for spherical end socket and skirt shell ring | |
| CN220634358U (en) | Reaction tube of tubular reactor | |
| CN209877738U (en) | Connecting device for tube and wall plate of non-metal heat exchanger | |
| CN219198104U (en) | Head connecting pipe structure of outer shell of pressure vessel | |
| CN219570838U (en) | Novel flexible structure for sealing jacket of pressure vessel | |
| CN218495929U (en) | Plug for heat exchange tube of hydrogen heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |