CN101829827B - High temperature vacuum brazing clamp for internally finned tube - Google Patents
High temperature vacuum brazing clamp for internally finned tube Download PDFInfo
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- CN101829827B CN101829827B CN2010101993140A CN201010199314A CN101829827B CN 101829827 B CN101829827 B CN 101829827B CN 2010101993140 A CN2010101993140 A CN 2010101993140A CN 201010199314 A CN201010199314 A CN 201010199314A CN 101829827 B CN101829827 B CN 101829827B
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- internally finned
- supporting tube
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Abstract
The invention relates to a high temperature vacuum brazing clamp for an internally finned tube. The clamp consists of a supporting guide tube, an inner supporting cone, a core tube, an end head supporting cone, a gasket and a nut, wherein the supporting guide tube consists of a plurality of tube segments which are formed by uniformly cutting a circular tube along the axial direction; when an external force is applied to the nut, the supporting guide tube can move along the inclined planes of the inner supporting cone and the end head supporting cone so as to uniformly stretch the tube segments of the supporting guide tube along the radial direction; and inner fins can be gradually and closely attached to the inner wall of an outer tube under the action of the uniform tension of the supporting guide tube. The clamp of the invention can apply uniform tension to the internally finned tube during the high temperature brazing process, reduce the distance for the weld joint, improve the ratio of welding area, improve the strength and the plasticity of the brazing joint and reduce the thermal contact resistance so as to meet the requirements for the use of the internally finned tube in a high temperature heat exchanger; and meanwhile, the clamp has a simple structure and convenient assembly and is suitable for large-scale industrial production.
Description
Technical field
The present invention relates to a kind of internally finned tube brazing jig and manufacturing process thereof, the anchor clamps that need during the particularly a kind of internally finned tube high temperature vacuum brazing that in high-temperature residual heat recovery fields such as chemical industry, metallurgy, glass manufacturing, burning city domestic garbage and living beings burning, uses.
Background technology
Be accompanied by the growing tension of the energy; The whole world needs energy power system more efficiently; And energy power system often needs higher operating temperature efficiently; Simultaneously global growing interest reduces discharging and is energy-conservation; Elevated temperature heat is polluted control and waste heat recovery more and more draws attention, so high-temperature heat-exchanging has the vast market demand in high-temperature residual heat recovery fields such as chemical industry, metallurgy, glass manufacturing, burning city domestic garbage and living beings burning, usually is higher than 900 ℃ like the operation of heat exchanger temperature of using in the fields such as SOFC, external firing combined cycle, chemistry of nuclear energy hydrogen manufacturing; The performance of this heat exchanging device has proposed stern challenge, and heat exchange efficiency lowly is a great problem that high-temperature heat-exchanging faces.
Internally finned tube is as a kind of new enhanced heat exchange mode; Solution-air heat exchange occasions such as Tube For Compressor Intercooler have been widely used in; Be mainly used in the working environment of relatively lower temp at present; Its manufactured materials has carbon steel, copper and stainless steel, and its welding can be adopted conventional solder or solder brazing mode.More existing at present scholars propose internally finned tube is used for the enhanced heat exchange of high-temperature heat-exchanging, but because many factors such as material, structure and manufacturing also do not obtain actual application.Wherein, the high temperature vacuum brazing technology of internally finned tube does not still have mature experience and can supply to use for reference.
For the high temperature alloy internally finned tube that high temperature uses down, the requirement of aspects such as that conventional solder or solder brazing mode can not satisfy is high temperature resistant, high pressure resistant, intensity and service life needs to adopt nickel-based solder and high temperature vacuum brazing technology.And nickel-based solder generally be thickness is the paper tinsel band of 0.03～0.05mm, and this has just proposed very high requirement to the gap of brazed seam, because the process of soldering is the processes of elements such as boron, silicon, carbon in the solder to the mother metal diffusion.When the joint clearance of brazing was big, these elements in the brazed seam had little time to the whole diffusions of mother metal so that in brazed seam, form continuous brittle layer, and these brittle layers can have a strong impact on the intensity and the plasticity of soldered fitting.When the joint clearance of brazing was very little, diffusion length was very short, and these elements spread in the holding time fully, and brazing seam structure can not form large-area brittle layer, but formed the chromium ni solid solution, and the intensity of soldered fitting and plasticity can be guaranteed.For the very irregular internally finned tube of solder side, because the restriction of manufacturing process, the flatness at the flatness of stainless steel pipe inner surface, the roundness of inner fin and wing peak all can't guarantee accurately.The inventor shows through previous experiments, carries out high temperature vacuum brazing even insert the external diameter core Guan Houzai identical with the inner fin internal diameter in the inside of internally finned tube, also can't obtain good welding effect.Therefore, the mould that necessary development is suitable, the high temperature alloy internally finned tube that could obtain to meet the demands.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide high temperature vacuum brazing clamp for internally finned tube, these anchor clamps support cone, pad and nut by supporting tube, inner support cone, core pipe, termination and form.Wherein, Supporting tube evenly cuts the polylith section of jurisdiction that forms vertically by pipe and forms; When nut is applied external force; Supporting tube can move along the inclined-plane of inner support cone and termination support cone, thereby each piece section of jurisdiction of supporting tube is radially evenly opened, and the uniform tension that inner fin receives supporting tube can fit tightly on the inwall of outer tube gradually.Anchor clamps of the present invention can be internally finned tube and apply uniform tension force, can reduce welding seam distance, improve rate of deposition, improve the intensity and the plasticity of soldered fitting, reduce thermal contact resistance, thereby satisfy the requirement that internally finned tube uses in high-temperature heat-exchanging.
Technical scheme of the present invention is achieved in that high temperature vacuum brazing clamp for internally finned tube, supports cone, pad and nut by supporting tube, inner support cone, core pipe, termination and forms.Wherein, Supporting tube is installed in inner fin inside, and the inner support cone is installed between the adjacent supports conduit, and the outside that cone is installed in the supporting tube at two ends is supported in the termination; Core pipe inleakage supports the axle center hole of cone and termination support cone; All there is screw thread at core pipe two ends, and pad and nut are installed on the screw thread at core pipe two ends, and supporting tube evenly cuts the polylith section of jurisdiction that forms vertically by pipe and forms; When nut is applied external force; The polylith section of jurisdiction of supporting tube can be moved along the inclined-plane of inner support cone and termination support cone, thereby the polylith section of jurisdiction of supporting tube is radially evenly opened, and the uniform tension that inner fin receives supporting tube can fit tightly on the inwall of outer tube gradually.
Described supporting tube can evenly be cut into 2,3 or 4 as required, supporting tube circumferentially have 2 road grooves, slotting position simply twines at the fluting place with fine rule near the two ends of pipe, but can not fix.
The axle center of described inner support cone is a hollow structure, and two ends have the inclined-plane, and inclination angle of inclined plane β is of a size of 7 °＜β＜25 °.
The axle center of described end portion, supports cone is a hollow structure, and an end has the inclined-plane, and inclination angle of inclined plane θ is of a size of 7 °＜θ＜25 °.
Described inner support cone installation site is in the intersection of different section inner fins.
When only there was one section in described inner fin, supporting tube only needed one section, does not need the inner support cone.
When described inner fin is made up of 2 sections inner fins, need 2 sections supporting tubes and 1 inner support cone; When inner fin is made up of N section inner fin, need N section supporting tube and (N-1) individual inner support cone.
Described clamp material adopts carbon steel, stainless steel or high temperature alloy.
Described anchor clamps can be used for the soldering of high temperature alloy internally finned tube, stainless steel internally finned tube or carbon steel internally finned tube.
The present invention has the following advantages: (1) anchor clamps can be internally finned tube and apply uniform tension force, thereby reduce welding seam distance, improve rate of deposition, improve the intensity and the plasticity of soldered fitting, reduce thermal contact resistance.
(2) clamp structure is simple, and is easy to assembly, is applicable to large-scale commercial production; (3) anchor clamps can be dismantled and reuse, and reduce manufacturing cost.
Description of drawings
Fig. 1 (a) is the structural representation of longitudinal ripple shape internally finned tube.
Fig. 1 (b) is the structural representation of vertical straight internally finned tube.
Fig. 2 is the structural representation of high temperature vacuum brazing clamp for internally finned tube of the present invention.
Fig. 3 (a) is the structural front view of supporting tube parts in the anchor clamps of the present invention.
Fig. 3 (b) is the structure side view of supporting tube parts in the anchor clamps of the present invention.
Fig. 4 (a) is the structural front view of inner support cone part in the anchor clamps of the present invention.
Fig. 4 (b) is the structure side view of inner support cone part in the anchor clamps of the present invention.
Fig. 5 (a) is the structural front view of anchor clamps medial end portions cone of support body component of the present invention.
Fig. 5 (b) is the structure side view of anchor clamps medial end portions cone of support body component of the present invention.
Fig. 6 is the another kind of example structure sketch map of high temperature vacuum brazing clamp for internally finned tube of the present invention.
Wherein, the 1-outer tube, the 2-inner fin, the 3-supporting tube, 3a-fluting place, 4-inner support cone, 5-core pipe, cone, 7-pad, 8-nut, 9-solder are supported in the 6-termination.
Below in conjunction with accompanying drawing content of the present invention is done further explain.
The specific embodiment
Fig. 1 (a) and Fig. 1 (b) have described two kinds of internally finned tube structural representations that the present invention needs soldering, and wherein, the inner fin 2 that Fig. 1 (a) describes be a longitudinal ripple shape fin, and the inner fin 2 of Fig. 1 (b) description is vertical plain fin.In order to obtain the good heat transfer effect; The wing peak of inner fin 2 outer surfaces must weld with the inner surface of outer tube 1 to reduce thermal contact resistance; But can find out that from figure (1) pad is a lot of and irregular, and the nickel-based solder 9 that uses in the high temperature vacuum brazing be thickness is the paper tinsel band of 0.03～0.05mm; This has just proposed very high requirement to the assembly technology of internally finned tube before the soldering, and this patent has proposed a kind of novel internally finned tube high temperature vacuum brazing to this problem just and used mould.
Fig. 2 is a kind of specific embodiment of the present invention.
With reference to shown in Figure 2, high temperature alloy high temperature vacuum brazing clamp for internally finned tube of the present invention supports cone 6, pad 7 and nut 8 by supporting tube 3, inner support cone 4, core pipe 5, termination and forms.Wherein, Supporting tube 3 is installed in inner fin 2 inside; Inner support cone 4 is installed between the adjacent supports conduit 3, and the outside that cone 6 is installed in the supporting tube 3 at two ends is supported in the termination, and core pipe 5 inleakages support the axle center hole of cone 4 and termination support cone 6; All there is screw thread at core pipe 5 two ends, and pad 7 and nut 8 are installed on the screw thread of core pipe 5 and cone 6, inner support cone 4 and supporting tube 3 are supported in the termination and clamp.Supporting tube 3 evenly cuts the polylith steel disc that forms vertically by stainless steel tube and forms; When nut 8 is applied external force; Supporting tube 3 can move along the inclined-plane that cone 6 is supported in inner support cone 4 and termination; Thereby supporting tube 3 is radially evenly opened, and the uniform tension that inner fin 2 receives supporting tube 3 can fit tightly on the inwall of outer tube 1 gradually.Before soldering, should be at first with Ni-based foil-shaped brazing material 9 uniform winding on the outer surface of inner fin 2, then inner fin 2 is installed in outer tube 1 inside, at last above-mentioned mould is installed to internally finned tube inside.Inner fin 2 shown in Figure 2 is made up of 3 sections inner fins, mainly is to consider that the used strip width of manufacturing inner fin is very narrow, under the long situation of outer tube 1, then needs the multistage inner fin.Because the restriction of manufacturing process, the roundness of different section inner fins and the flatness at wing peak are inequality, and the flatness of stainless steel pipe inner surface diverse location also is not quite similar, the weld gap difference that therefore forms at different section inner fins.In order to obtain higher rate of deposition; The present invention also manufactures multistage with supporting tube 3, each section supporting tube 3 corresponding one section inner fin 2, and the length of supporting tube 3 is shorter slightly than inner fin 2; Must guarantee that inner support cone 4 installation sites are in the intersection of different section inner fins 2; The thrust of inner support cone 4 generations can make different section supporting tubes 3 produce the various supports effects like this, can satisfy the needs of different weld seams, can improve rate of deposition.When inner fin 2 is made up of 2 sections inner fins, then need 2 sections supporting tubes 3 and 1 inner support cone 4; When inner fin 2 is made up of N section inner fin, need N section supporting tube 3 and (N-1) individual inner support cone 4.
Shown in Fig. 3 (a) and Fig. 3 (b); Supporting tube 3 in the anchor clamps of the present invention by pipe vertically evenly 3 sections of jurisdiction forming of cutting forms, pipe circumferentially open 2 road groove 3a, slotting position is near the end positions of pipe; Can according to actual needs pipe evenly be cut into 2,3,4 or polylith; Otch should try one's best little still can keep original round tube shape basically so that cutting section of jurisdiction afterwards is stitched together, and preceding round tube shape is stitched together and 3a simply twines at the fluting place with fine rule by cutting with the polylith section of jurisdiction 3 of cutting, but can not fix; Because twine fine rule is for the ease of assembling; After treating that mould is put into internally finned tube, during fastening nut 8, need the polylith section of jurisdiction of supporting tube 3 radially evenly to open.
Shown in Fig. 4 (a) and Fig. 4 (b), the axle center hollow of the inner support cone 4 in the anchor clamps of the present invention, two ends have the inclined-plane; Inclination angle of inclined plane β is unsuitable excessive also unsuitable too small; Suggestion 7 °＜β＜25 °, because the too small meeting of inclination angle of inclined plane β causes self-locking, inclination angle of inclined plane β crosses conference and brings difficulty for the slip of supporting tube 3 slight distance; To guarantee the slickness on inclined-plane simultaneously, help the slip of supporting tube 3 on inner support cone 4 inclined-planes like this.
Shown in Fig. 5 (a) and Fig. 5 (b), the axle center hollow of the end portion, supports cone 6 in the anchor clamps of the present invention, an end has the inclined-plane; Inclination angle of inclined plane θ is unsuitable excessive also unsuitable too small; Suggestion 7 °＜θ＜25 °, because the too small meeting of inclination angle of inclined plane θ causes self-locking, inclination angle of inclined plane θ crosses conference and brings difficulty for the slip of supporting tube 3 slight distance; Also to guarantee simultaneously the slickness on inclined-plane, help the slip of supporting tube 3 on end portion, supports cone 6 inclined-planes like this.
Accompanying drawing 6 is an another kind of specific embodiment of the present invention.
With reference to shown in Figure 6, high temperature vacuum brazing clamp for internally finned tube of the present invention supports cone 6, pad 7 and nut 8 by supporting tube 3, core pipe 5, termination and forms.With accompanying drawing 2 differences be, accompanying drawing 6 does not have inner support cone 4, and the structure of other associated components is identical with the embodiment that accompanying drawing 2 is introduced, and mould shown in Figure 6 is applicable to that internally finned tube length is than the situation of lacking and have only one section internally finned tube.
Claims (8)
1. high temperature vacuum brazing clamp for internally finned tube; It is characterized in that; Support cone (6), pad (7) and nut (8) by supporting tube (3), inner support cone (4), core pipe (5), termination and form, wherein, supporting tube (3) is installed in inner fin (2) inside; Inner support cone (4) is installed between the adjacent supports conduit (3); The outside that cone (6) is installed in the supporting tube (3) at two ends is supported in the termination, and core pipe (5) inleakage supports the axle center hole of cone (4) and termination support cone (6), and all there is screw thread at core pipe (5) two ends; Pad (7) and nut (8) are installed on the screw thread at core pipe (5) two ends; Supporting tube (3) by pipe vertically evenly the polylith section of jurisdiction that forms of cutting forms, when to nut (8) when applying external force, the polylith section of jurisdiction of supporting tube (3) can be moved along the inclined-plane of inner support cone (4) and termination support cone (6); Thereby the polylith section of jurisdiction of supporting tube (3) is radially evenly opened, and the uniform tension that inner fin (2) receives supporting tube (3) can fit tightly on the inwall of outer tube (1) gradually.
2. high temperature vacuum brazing clamp for internally finned tube according to claim 1; It is characterized in that described supporting tube (3) evenly cuts into 2,3 or 4, supporting tube (3) circumferentially have 2 road grooves (3a); Slotting position twines at the fluting place with fine rule near the two ends of pipe.
3. high temperature vacuum brazing clamp for internally finned tube according to claim 1 is characterized in that, the axle center of described inner support cone (4) is a hollow structure, and two ends have the inclined-plane, and inclination angle of inclined plane β is of a size of 7 °＜β＜25 °.
4. high temperature vacuum brazing clamp for internally finned tube according to claim 1 is characterized in that, the axle center of described end portion, supports cone (6) is a hollow structure, and an end has the inclined-plane, and inclination angle of inclined plane θ is of a size of 7 °＜θ＜25 °.
5. high temperature vacuum brazing clamp for internally finned tube according to claim 1 is characterized in that, described inner support cone (4) installation site is in the intersection of adjacent inner fin (2).
6. high temperature vacuum brazing clamp for internally finned tube according to claim 1 is characterized in that, when only there was one section in described inner fin (2), supporting tube (3) only needed one section, does not need inner support cone (4).
7. high temperature vacuum brazing clamp for internally finned tube according to claim 1 is characterized in that, when described inner fin (2) is made up of 2 sections inner fins, needs 2 sections supporting tubes (3) and 1 inner support cone (4); When inner fin (2) is made up of N section inner fin, need N section supporting tube (3) and (N-1) individual inner support cone (4).
8. high temperature vacuum brazing clamp for internally finned tube according to claim 1 is characterized in that, described clamp material adopts carbon steel, stainless steel or high temperature alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101993140A CN101829827B (en) | 2010-06-12 | 2010-06-12 | High temperature vacuum brazing clamp for internally finned tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101993140A CN101829827B (en) | 2010-06-12 | 2010-06-12 | High temperature vacuum brazing clamp for internally finned tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101829827A CN101829827A (en) | 2010-09-15 |
| CN101829827B true CN101829827B (en) | 2012-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101993140A Expired - Fee Related CN101829827B (en) | 2010-06-12 | 2010-06-12 | High temperature vacuum brazing clamp for internally finned tube |
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| CN (1) | CN101829827B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801847B (en) * | 2014-03-11 | 2016-02-03 | 中国化学工程第六建设有限公司 | A kind of copper tube welding method |
| CN104175010B (en) * | 2014-07-16 | 2016-03-02 | 江苏南通申通机械有限公司 | A kind of serrated fin pipe preparation method and special tooling thereof |
| CN109797960B (en) * | 2019-03-21 | 2024-05-24 | 风范绿色建筑（常熟）有限公司 | Reinforced bearing type square tube |
| CN112756723B (en) * | 2020-12-30 | 2023-03-31 | 中国核电工程有限公司 | Internal pressure brazing method for double sleeves and double-sleeve welding assembly |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235600Y (en) * | 1995-12-22 | 1996-09-18 | 河北省东光县石油化工机械厂 | High frequency welded helically-wound fins tube |
| CN2906525Y (en) * | 2006-04-29 | 2007-05-30 | 牛玉振 | Inner finned tube |
| CN101334248A (en) * | 2008-07-15 | 2008-12-31 | 西安石油大学 | Longitudinal spiral inner fin tube |
| CN201193936Y (en) * | 2008-03-19 | 2009-02-11 | 天津华能集团能源设备有限公司 | Inner finned pipe |
| CN101466992A (en) * | 2006-07-14 | 2009-06-24 | 株式会社科倍可菱材料 | Fin-and-tube type heat exchanger, and its return bend pipe |
| CN201335623Y (en) * | 2008-12-30 | 2009-10-28 | 开封黄河空分集团有限公司 | Finned tube exchanger inside compressor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63251792A (en) * | 1987-04-09 | 1988-10-19 | Dai Ichi High Frequency Co Ltd | Thermal conducting pipe with deep fins of fine pitch |
-
2010
- 2010-06-12 CN CN2010101993140A patent/CN101829827B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235600Y (en) * | 1995-12-22 | 1996-09-18 | 河北省东光县石油化工机械厂 | High frequency welded helically-wound fins tube |
| CN2906525Y (en) * | 2006-04-29 | 2007-05-30 | 牛玉振 | Inner finned tube |
| CN101466992A (en) * | 2006-07-14 | 2009-06-24 | 株式会社科倍可菱材料 | Fin-and-tube type heat exchanger, and its return bend pipe |
| CN201193936Y (en) * | 2008-03-19 | 2009-02-11 | 天津华能集团能源设备有限公司 | Inner finned pipe |
| CN101334248A (en) * | 2008-07-15 | 2008-12-31 | 西安石油大学 | Longitudinal spiral inner fin tube |
| CN201335623Y (en) * | 2008-12-30 | 2009-10-28 | 开封黄河空分集团有限公司 | Finned tube exchanger inside compressor |
Non-Patent Citations (1)
| Title |
|---|
| JP昭63-251792A 1988.10.19 |
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