CN214950772U - Flexible tube plate structure and waste heat boiler with same - Google Patents
Flexible tube plate structure and waste heat boiler with same Download PDFInfo
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- CN214950772U CN214950772U CN202120819099.3U CN202120819099U CN214950772U CN 214950772 U CN214950772 U CN 214950772U CN 202120819099 U CN202120819099 U CN 202120819099U CN 214950772 U CN214950772 U CN 214950772U
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Abstract
The utility model relates to the technical field of heat exchange equipment, in particular to a flexible tube plate structure and a waste heat boiler with the same, wherein the flexible tube plate structure comprises a thin tube plate, a thick tube plate and a plurality of pulling plates, each pulling plate comprises a plate body and a plurality of pulling rods arranged on the plate body, the thick tube plate is provided with a plurality of bosses which are arranged, the plate bodies are welded on the bosses corresponding to the thick tube plate in a butt joint manner, and the thick tube plate and the thin tube plate are provided with tube holes for the heat exchange tubes to pass through; the thin tube plate is provided with a plurality of rows of supporting holes, and a plurality of pull rods of the pull supporting plate are inserted into the supporting holes of the corresponding rows and mutually countersunk and welded and fixed. The thin tube plates are welded and connected with the thick tube plates through the stay plates, the thick tube plates which are not easy to deform connect the thin tube plates into a whole through the stay plates with higher rigidity, so that the strength of the thin tube plates is enhanced, the thin tube plates are prevented from deforming, and the problems of instability and the like of the stay plates can be prevented; the utility model has convenient operation of arranging and welding each stay plate, and reduces the manufacturing difficulty; the integral strength is higher, and a more effective strengthening effect is provided for the thin tube plate.
Description
Technical Field
The utility model relates to a heat transfer equipment technical field that is arranged in fields such as petroleum refining and chemical industry, coal chemical industry, concretely relates to flexible tube sheet structure and have exhaust-heat boiler of this structure.
Background
In the fields of petroleum refining, chemical industry, coal chemical industry and the like, the research on energy-saving technology is increasing day by day, and a heat exchanger is the most common and most applied equipment in the work of recovering heat energy. The joint of the tube plate and the heat exchange tube of the heat exchanger is the most core part of the whole heat exchanger and also the weakest part, and a large number of failures of the heat exchanger occur at the part. Waste heat boilers are a common type of heat exchanger.
Because the traditional tube plate has larger thickness, the heat transfer is slow in the thickness direction, the temperature gradient is large, the stress concentration and other adverse factors on equipment use easily cause the damage of the joint of the heat exchange tube and the tube plate, and the heat exchange tube becomes the main weak part of the heat exchanger. The tube plate is too thick, so that a gap between the tube hole on the tube plate and the heat exchange tube is too large, salt substance concentration and scaling can occur in the gap, and scaling corrosion can be generated. Under the high temperature condition, the thick tube plate heat exchanger is difficult to ensure the long-period operation of the equipment.
The thin tube plate effectively reduces the temperature difference of the tube plate, and can effectively avoid the damage of the connection part of the heat exchange tube and the tube plate and the equipment failure caused by the cracking of the tube plate. However, under the condition of large-scale high pressure and high temperature, especially under the working condition of large pressure difference of tube shell pass, the tube plate part of the thin tube plate waste heat boiler can deform greatly due to the pressure difference of the tube shell pass, and the joint of the tube plate and the heat exchange tube is easy to lose efficacy.
The utility model provides a chinese patent number is CN201720412001.6 from this, and the name is the technique of "a double tube sheet combination formula rapid cooling boiler for coal chemical industry", through setting up the mode that thin tube sheet and thick tube sheet combined together, through intensive lacing wire welded fastening between thin tube sheet and the thick tube sheet. The thin tube plate can absorb partial thermal expansion due to elastic deformation, and has good heat conduction effect, so that the temperature difference between two sides of the thin tube plate is small, thereby reducing the thermal stress of the tube plate in working and enhancing the cooling effect; in addition, the thin tube plate and the thick tube plate are connected into a whole by the lacing wires, the thin tube plate is strengthened, the thin tube plate is not easy to deform and keeps in a plane state, the fixed connection position of the thin tube plate and the shell does not bear bending alternating load, and the thin tube plate can bear larger pressure.
Therefore, the thin tube plates and the thick tube plates are welded and fixed in a large number of densely arranged modes, the welding and fixing difficulty is high, and the tie bars and the thick tube plates are fillet welded, so that the fixing strength is low.
SUMMERY OF THE UTILITY MODEL
There is above-mentioned technical problem to prior art, the utility model provides a flexible tube sheet structure and have exhaust-heat boiler of this structure, its welded fastening of being convenient for, and joint strength is high.
In order to achieve the above object, the utility model provides a following technical scheme:
the flexible tube plate structure comprises a thin tube plate, a thick tube plate and a plurality of pull supporting plates arranged in parallel, wherein each pull supporting plate comprises a plate body and a plurality of pull rods arranged on the plate body; the thin tube plate is provided with a plurality of rows of supporting holes, and a plurality of pull rods of the pull supporting plate are inserted into the corresponding rows of supporting holes and are welded and fixed in a counter bore welding mode.
Further preferably, the plate body and the pull rod of each pull supporting plate are of an integrated structure.
Further preferably, the plate body is a square plate, and the boss end face is a flat face matched with the end face of the plate body.
Further preferably, the support holes are circular holes, and the pull rod is a circular rod body matched with the support holes.
Further preferably, the plate body is provided with a slot hole penetrating through the thickness of the plate body.
Further preferably, the number of the slotted holes is plural, and the plurality of slotted holes are arranged along the width and length directions of the plate body.
Further preferably, the periphery of the pipe hole is expanded with an extension groove, so that the pipe hole is plum-blossom-shaped; and/or a plurality of liquid through holes are formed at the position of the thick tube plate close to the periphery of the thick tube plate.
Further preferably, the end of the pull rod is flush with the end face of the thin tube plate.
The waste heat boiler with the flexible tube plate structure comprises an inlet tube box, an outlet tube box and a shell-side cylinder, wherein a plurality of heat exchange tubes are arranged in the shell-side cylinder, the thin tube plate is connected with the inlet tube box, the thick tube plate is connected with the shell-side cylinder, one end of each heat exchange tube penetrates through a tube hole of the thick tube plate and then penetrates between two adjacent tension plates, and the thin tube plate is communicated with the inlet tube box; the shell-side cylinder is also provided with a rear tube plate, and the other end of the heat exchange tube penetrates through the rear tube plate and is communicated with the outlet tube box.
Further preferably, the width of the plate body of the pull supporting plate is smaller than the inner diameter of the shell-side cylinder body, so that a gap is reserved between the plate body and the shell-side cylinder body.
The utility model has the advantages that:
the utility model discloses a flexible tube sheet structure and have exhaust-heat boiler of this structure compares with prior art, has following effect:
1) compared with the connection structure of the heat exchange tube and the thicker tube plate in the prior art, the connection structure of the heat exchange tube and the thin tube plate is adopted by the utility model, the full-penetration deep hole welding is easier to realize, the tube head quality is ensured, and the problems of high-temperature failure and gap corrosion of the connection welding seam of the heat exchange tube and the thick tube plate are avoided;
2) the double-tube plate structure combining the thin tube plate and the thick tube plate can enhance the strength of the thin tube plate and avoid the failure of equipment caused by the great bending deformation of the thin tube plate in the use process;
3) the double tube plates of the thin tube plate and the thick tube plate are connected by welding through the stay plates, the thick tube plate which is not easy to deform connects the thin tube plates into a whole through the stay plates with higher rigidity, the strength of the thin tube plates is enhanced, and the thin tube plates are prevented from deforming;
4) the connection side of the pulling and supporting plate and the thick tube plate is of a plate body structure, so that the problems of instability and the like of the pulling and supporting plate can be prevented;
5) compared with the prior art of respectively intensively welding a plurality of tie bars, the utility model can arrange and weld all the tie bars, is convenient for welding operation, and reduces the manufacturing difficulty;
6) each row of pull rods are connected into a whole by plate bodies, so that the integral strength is higher, and a more effective strengthening effect is provided for the thin tube plate;
further:
7) the connecting side of the pull supporting plate and the thin tube plate is of a pull rod structure, and the connecting side of the pull supporting plate and the thick tube plate is a plate with a slotted hole, so that shell-side cooling water can rapidly and uniformly flow between the double tube plates, and high-temperature failure of equipment caused by high-temperature dead corners is prevented;
8) a large gap is formed between the quincunx tube hole on the thick tube plate and the heat exchange tube, so that cooling liquid can pass through the thick tube plate without blockage and gap corrosion; quincunx pipe holes are formed in the thick pipe plate, and quincunx petals of the pipe holes are uniformly distributed, so that cooling liquid flows uniformly;
9) the width of the pull supporting plate is smaller than the inner diameter of the shell pass cylinder, and a liquid circulation channel is reserved between the shell pass cylinder and the pull supporting plate, so that the shell pass outer ring is also cooled by cooling water, and high-temperature failure is avoided;
10) inserting the tension support plate into the thin tube plate, and welding by adopting counter bores; the thick tube plate is provided with a boss welded with the stay plate, and the thick tube plate and the stay plate are in butt welding, so that the welding quality between the stay plate and the tube plate is ensured.
Drawings
Fig. 1 is a schematic structural view of a waste heat boiler in an embodiment.
Fig. 2 is a detailed structural diagram at I in the figure.
Fig. 3 is a sectional view taken in the direction B-B in fig. 2.
Fig. 4 is a schematic view of direction a in fig. 2.
Fig. 5 is a view in the direction of C-C in fig. 2.
Fig. 6 is a schematic view of a stay plate in the embodiment.
Fig. 7 is another visual schematic diagram of the stay plate in the embodiment.
Fig. 8 is a schematic view of a thick tube sheet in an embodiment.
FIG. 9 is another visual schematic of a thick tube sheet in an embodiment.
FIG. 10 is a schematic view of yet another view of a thick tube sheet in an embodiment.
Fig. 11 is a schematic view of tube holes of a thick tube sheet in an embodiment.
Reference numerals:
the device comprises an inlet tube box 1, a flexible tube plate structure 2, a shell pass cylinder 3, a rear tube plate 4, an outlet tube box 5, a thin tube plate 6, a bracing plate 7, a boss 8, a thick tube plate 9, a heat exchange tube 10, a support hole 11, a pull rod 12, a plate body 13, a slotted hole 14, a tube hole 15 and a liquid through hole 16.
Detailed Description
The present invention will be described in detail with reference to the following embodiments and accompanying drawings.
The waste heat boiler of the present embodiment, as shown in fig. 1 to 11, includes an inlet tube box 1, an outlet tube box 5 and a shell-side cylinder 3, the end portion of the shell-side cylinder 3 close to the inlet tube box 1 is provided with a flexible tube sheet structure 2, the flexible tube sheet structure 2 includes a thin tube sheet 6, a thick tube sheet 9 and a plurality of stay plates 7 arranged in parallel, each stay plate 7 includes a plate body 13 and a plurality of pull rods 12 arranged on one side of the plate body 13, the thick tube sheet 9 is provided with a plurality of bosses 8 arranged, the arrangement direction of the bosses 8 is the same as the width direction of the plate body 13, and the other side of the plate body 13 is butt-welded to the boss 8 corresponding to the thick tube sheet 9. The thin tube plate 6 is provided with a plurality of rows of support holes 11, a plurality of pull rods 12 of the pull support plate 7 penetrate into the corresponding rows of support holes 11 and are welded and fixed in a counter bore welding mode, and the support holes are ground flat after welding. In practice, the pull rod 12 can only extend out of the plate body 13 by a small length, and the length of the pull rod 12 is controlled, so that the overall strength of the pull supporting plate 7 can be further improved. The thickness of the thin tube plate 6 and the thickness of the thick tube plate 9 are relative, the thickness of the thin tube plate 6 meets the flexible deformation requirement, and the thickness of the thick tube plate 9 meets the strength requirement.
The mode that the thin tube plate 6 and the thick tube plate 9 are combined can avoid the damage of the joint of the traditional heat exchange tube 10 and the tube plate and the equipment failure caused by the tube plate cracking, and the tube plate is not easy to generate great bending deformation characteristic under the condition of high pressure and high temperature, especially under the working condition that the pressure difference of the tube shell side is great, and the structure also has the advantage of preventing the gap structure from being corroded and failed. The double-tube plate structure of combining the thin tube plate 6 with the thick tube plate 9 can enhance the strength of the thin tube plate 6 and avoid the failure of equipment caused by the great bending deformation of the thin tube plate 6 in the use process. The thin tube plates 6 are welded and connected with the double tube plates of the thick tube plate 9 through the pull supporting plate 7, the thick tube plate 9 which is not easy to deform connects the thin tube plates 6 into a whole through the pull supporting plate 7 with higher rigidity, the strength of the thin tube plates 6 is enhanced, and the thin tube plates 6 are prevented from deforming. The connection side of the pull supporting plate 7 and the thick tube plate 9 is of a plate body 13 structure, so that the problems of instability and the like of the pull supporting plate 7 can be prevented. Compare and have now with many lacing wires intensive welding technique respectively, the utility model discloses only need with each bracing board 7 arrange the welding can, the modularization welding, welding operation is convenient, reduces the manufacturing degree of difficulty. Each row of pull rods 12 are connected into a whole by the plate body 13, so that the overall strength is higher, and a more effective strengthening effect is provided for the thin tube plate 6.
A plurality of heat exchange tubes 10 which are arranged in parallel are arranged in the shell-side cylinder 3, the thin tube plate 6 is connected with the inlet tube box 1, the thick tube plate 9 is connected with the shell-side cylinder 3, the thin tube plate 6 and the thick tube plate 9 are both provided with tube holes 15 for the heat exchange tubes 10 to pass through, one end of each heat exchange tube 10 passes through the tube hole 15 of the thick tube plate 9 and then passes between the two adjacent pull support plates 7, the thin tube plate 6 is communicated with the inlet tube box 1, and fluid of the inlet tube box 1 flows into the heat exchange tubes 10. The heat exchange tube 10 is welded and fixed with the thin tube plate 6. Adopt heat exchange tube and thicker tube sheet connection structure for the tradition, realize full penetration deep hole welding more easily between the heat exchange tube 10 of this embodiment and the thin tube sheet 9, guarantee the tube head quality, the full penetration deep hole welding structure of thin tube sheet 6 avoids heat exchange tube 10 and thick tube sheet 9 to be connected the welding seam and the high temperature inefficacy and the crevice corrosion problem appear for traditional thick tube sheet 9 and heat exchange tube 10 connection structure. The shell-side barrel 3 is also provided with a rear tube plate 4, and the other end of the heat exchange tube 10 is communicated with an outlet tube box 5 after passing through the rear tube plate 4.
In this embodiment, the plate body 13 and the pull rod 12 of each stay plate 7 are integrated with each other, specifically, a groove is formed in the plate, so as to form a plurality of pull rods 12. The plate body 13 is a square plate, the end face of the boss 8 is a flat face matched with the end face of the plate body 13, a large welding area is provided, and welding is firmer. The supporting hole 11 is a circular hole, and the pull rod 12 is a round rod body matched with the supporting hole 11.
In this embodiment, the plate body 13 is provided with a plurality of elliptical slots 14 penetrating the thickness of the plate body, and the plurality of slots 14 are arranged along the width and length directions of the plate body 13, so that the structure can enable the shell-side cooling water to flow between the double tube plates quickly and uniformly, and prevent high-temperature dead corners from occurring to cause high-temperature failure of the equipment.
In this embodiment, as shown in fig. 11, the peripheral portion of the tube hole 15 is expanded with an extension groove, so that the tube hole 15 is in a quincunx shape, and a large gap is formed between the quincunx tube hole 15 on the thick tube plate 9 and the heat exchange tube 10, so that the cooling liquid can pass through the thick tube plate 9 without being blocked or corroded in the gap. The quincunx petals of the quincunx pipe holes 15 on the thick pipe plate 9 are uniformly distributed, so that the cooling liquid flows uniformly. A plurality of liquid through holes 16 are uniformly distributed in a ring shape on the thick tube plate 9 near the periphery, the liquid through holes 16 do not have the heat exchange tubes 10 to pass through and are smooth through holes, and the shell side cooling water can flow through the liquid through holes 16 and the gaps between the tube holes 15 and the heat exchange tubes 10.
In this embodiment, the width of the plate body 13 of the stay plate 7 is smaller than the inner diameter of the shell-side cylinder 3, so that a gap is left between the plate body 13 and the shell-side cylinder 3, and a liquid circulation channel is left between the shell-side cylinder 3 and the stay plate 7, so that the shell-side outer ring is also cooled by cooling water, and high-temperature failure is avoided.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A flexible tube sheet structure comprising a thin tube sheet and a thick tube sheet, characterized by: the heat exchange tube plate is characterized by further comprising a plurality of pull supporting plates which are arranged in parallel, each pull supporting plate comprises a plate body and a plurality of pull rods which are arranged on the plate body, the thick tube plate is provided with a plurality of bosses which are arranged, the plate bodies of the pull supporting plates are welded on the bosses corresponding to the thick tube plate in a butt joint mode, and the thick tube plate and the thin tube plate are provided with tube holes through which heat exchange tubes pass; the thin tube plate is provided with a plurality of rows of supporting holes, and a plurality of pull rods of the pull supporting plate are inserted into the corresponding rows of supporting holes and are welded and fixed in a counter bore welding mode.
2. A flexible tube sheet structure as defined in claim 1, wherein: the plate body and the pull rod of each pull supporting plate are of an integrated structure.
3. A flexible tube sheet structure as defined in claim 1, wherein: the plate body is a square plate, and the boss end face is a flat face matched with the end face of the plate body.
4. A flexible tube sheet structure according to claim 1 or 3, wherein: the support holes are circular holes, and the pull rod is a circular rod body matched with the support holes.
5. A flexible tube sheet structure as defined in claim 1, wherein: the plate body is provided with a slotted hole penetrating through the thickness of the plate body.
6. A flexible tube sheet structure according to claim 5, wherein: the number of the slotted holes is multiple, and the slotted holes are arranged along the width direction and the length direction of the plate body.
7. A flexible tube sheet structure as defined in claim 1, wherein: the periphery of the pipe hole is expanded with an extension groove, so that the pipe hole is in a plum blossom shape; and/or a plurality of liquid through holes are formed at the position of the thick tube plate close to the periphery of the thick tube plate.
8. A flexible tube sheet structure as defined in claim 1, wherein: the end part of the pull rod is flush with the end face of the thin tube plate.
9. Waste heat boiler having a flexible tube sheet structure according to any one of claims 1 to 8, characterized in that: the heat exchange tube comprises an inlet tube box, an outlet tube box and a shell pass cylinder, wherein a plurality of heat exchange tubes are arranged in the shell pass cylinder, the thin tube plate is connected with the inlet tube box, the thick tube plate is connected with the shell pass cylinder, one end of each heat exchange tube penetrates through a tube hole of the thick tube plate and then penetrates between two adjacent tension support plates, and the thin tube plate is communicated with the inlet tube box; the shell-side cylinder is also provided with a rear tube plate, and the other end of the heat exchange tube penetrates through the rear tube plate and is communicated with the outlet tube box.
10. Waste heat boiler according to claim 9, characterized in that: the width of the plate body of the pull supporting plate is smaller than the inner diameter of the shell pass cylinder body, so that a gap is reserved between the plate body and the shell pass cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120819099.3U CN214950772U (en) | 2021-04-20 | 2021-04-20 | Flexible tube plate structure and waste heat boiler with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120819099.3U CN214950772U (en) | 2021-04-20 | 2021-04-20 | Flexible tube plate structure and waste heat boiler with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214950772U true CN214950772U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120819099.3U Active CN214950772U (en) | 2021-04-20 | 2021-04-20 | Flexible tube plate structure and waste heat boiler with same |
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| Country | Link |
|---|---|
| CN (1) | CN214950772U (en) |
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2021
- 2021-04-20 CN CN202120819099.3U patent/CN214950772U/en active Active
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