CN104329517A - Double sleeve - Google Patents
Double sleeve Download PDFInfo
- Publication number
- CN104329517A CN104329517A CN201410563442.7A CN201410563442A CN104329517A CN 104329517 A CN104329517 A CN 104329517A CN 201410563442 A CN201410563442 A CN 201410563442A CN 104329517 A CN104329517 A CN 104329517A
- Authority
- CN
- China
- Prior art keywords
- interior pipe
- pipe
- guide ring
- ventilation duct
- double
- 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.)
- Granted
Links
- 238000009423 ventilation Methods 0.000 claims description 90
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 229910052804 chromium Inorganic materials 0.000 claims description 16
- 239000011651 chromium Substances 0.000 claims description 16
- 229910052759 nickel Inorganic materials 0.000 claims description 16
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 15
- 229910052750 molybdenum Inorganic materials 0.000 claims description 15
- 239000011733 molybdenum Substances 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 239000011572 manganese Substances 0.000 claims description 7
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 210000005239 tubule Anatomy 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000001458 anti-acid effect Effects 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
- F16L9/19—Multi-channel pipes or pipe assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/24—Preventing accumulation of dirt or other matter in pipes, e.g. by traps, by strainers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention relates to the technical field of ash removal and particularly relates to a double sleeve. The double sleeve comprises an inner pipe and an outer pipe, wherein the inner pipe is arranged in the outer pipe in a sleeving manner; the outer wall of the inner pipe is clung to the inner wall of the outer pipe; a plurality of vent pipes which are coaxially arrayed in sequence and penetrate through the inner pipe are arranged on the inner wall of the inner pipe; pipe openings at the two ends of each vent pipe are communicated with the inner cavity of the inner pipe; a flow guide ring is arranged on the inner wall of the inner pipe between every two adjacent vent pipe and is provided with a through hole; the inner pipe, the vent pipes and the flow guide rings are integrally molded. According to the double sleeve provided by the invention, the technical problems in the prior art that a small pipe is welded into or is in thread connection with a large pipe so that the small pipe is easy to fall off are overcome; the utilization performance of the double sleeve is integrally improved and the service life is prolonged.
Description
Technical field
The present invention relates to ash cleaning technology field, in particular to a kind of double-jacket tube.
Background technique
Double-jacket tube ash cleaning technology is a malleation Condensed transportation technology, and its effect utilizes the air-flow with certain speed and pressure by pipeline, by solid particulate matter, is delivered to terminal by starting point.Its structure is large pipe box tubule, namely on the top of bassoon (inwall), with bolt and the tubule welding installing one minor diameter, tubule offers a specific opening (making it communicate with the inside of bassoon) at spacing intervals, in the process of conveying, the tubule being provided with multiple opening can form turbulent flow, is adding the gravity of solid particulate matter self, it can slowly be deposited in bottom bassoon, and then reaches dedusting effect.
But; in the related; this common double-jacket tube; the direct bolt of tubule connects or is welded on bassoon upper inside wall; in the process of work, whole tubule is the equal of what suspend in midair, adds in the operation of some specific environment; double-jacket tube there will be and vibrates largely, and then makes tubule usually there will be the phenomenon come off.Tubule is once come off, and the dusting function of whole double-jacket tube lost efficacy, and separation point is not easily investigated and repaired.Therefore, a kind of double-jacket tube effectively preventing tubule from coming off is provided to be those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
The object of the present invention is to provide a kind of double-jacket tube, to solve above-mentioned technical problem.
Provide double-jacket tube in an embodiment of the present invention, comprise inner and outer tubes; Described interior pipe box is located in described outer tube, and the outer wall of described interior pipe and the inwall of described outer tube fit; The inwall of described interior pipe is provided with multiple in turn, coaxially arrangement and the ventilation duct run through by described interior pipe; Further, the mouth of pipe at the two ends of each described ventilation duct communicates with the inner chamber of described interior pipe; The inwall being in the described interior pipe often between adjacent two ventilation ducts is provided with guide ring, described guide ring is provided with through hole; Described interior pipe, described ventilation duct and described guide ring are one-body molded.
This double-jacket tube provided by the invention, its construction package mainly comprises inner and outer tubes, and outer tube, as supporting element, which provides the space of sheathed interior pipe, and the main structure of interior Guan Zewei double-jacket tube; Concrete, the inwall of its outer wall and outer tube fits, and its inwall is provided with multiple in turn, coaxially arrangement and the ventilation duct run through by described interior pipe; All ventilation ducts all in turn coaxially arrange (a line arrangement, and all coaxial), and whole interior pipe is run through (all ventilation ducts become a line arrange after length consistent with the length of interior pipe).And there is the mouth of pipe communicated with the inner chamber of interior pipe in each ventilation duct, like this in the process of dedusting, can form the secondary air channel that air feed flows through.In addition, due to be in the described interior pipe often between adjacent two ventilation ducts inwall on be provided with guide ring, described guide ring is provided with through hole, like this, in the process of ventilating from one end of double-jacket tube to the other end, two often adjacent ventilation ducts can be able to through by guide ring, and guide ring itself also can stop portions solid particle, during using ventilation duct, guide ring etc. as secondary air channel, turbulent flow can be formed, be convenient to solid particle drop and be deposited on bottom interior pipe, and reach dust removing effects.Even more important, due in double-jacket tube of the present invention, the one-body molded setting of interior pipe, ventilation duct and guide ring, it integrally sheathedly (is specially outer tube wall) within the outer tube, and be that prestressing force assembles with outer tube, and then overcome in prior art by tubule welding or be threaded in bassoon exist the caducous technical problem of tubule, improve the usability of double-jacket tube on the whole, extend its working life.
Optionally, the thickness of described interior pipe with the ratio of the thickness of described outer tube is: 7/8-5/3; The thickness of described ventilation duct is equal with the thickness of described interior pipe.
Optionally, the length of all described ventilation ducts is equal, and the mouth of pipe of all described ventilation ducts is inclined-plane.
Optionally, described guide ring is vertically set on the inwall of described interior pipe, and its one end away from the inwall of described interior pipe is concordant away from the side of described interior pipe with described ventilation duct.
Optionally, described through hole is arranged on the middle part of described guide ring, and its cross section is circular.
Optionally, the thickness of described guide ring is 5-7mm.
Optionally, the length of each described ventilation duct is 400-550 millimeter.
Optionally, in described interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises:
Carbon 300-450 part, chromium 300-1500 part, manganese 50-70 part, molybdenum 30-300 part, nickel 90-100 part;
Pipe, ventilation duct and guide ring (one-body molded) in being made up of above component, it has good wear-resisting property, and compared with the product of common low-carbon steel material, its abrasion loss is low carbon steel 6%-10%.
Optionally, in described interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises:
Carbon 210-280 part, chromium 2000-3000 part, manganese 50-100 part, molybdenum 180-300 part, nickel 200-1800 part, copper 125-200 part;
Manage in being made up of above-mentioned component, ventilation duct and guide ring, its by component preferably and compatibility, the product made just has extraordinary acid resistance to corrode, and compared with common Stainless Steel Products, its working life is more than 10 times of Stainless Steel Products.
Optionally, in described interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises:
Carbon 280-350 part, chromium 1000-1500 part, manganese 50-80 part, molybdenum 100-200 part, nickel 150-400 part, copper 140-250 part.
Manage in being made up of above-mentioned component, ventilation duct and guide ring, it belongs to alkali resistance corrosion products, and its working life is more than 10 times of Stainless Steel Products.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The transverse cross-sectional view of the double-jacket tube that Fig. 1 provides for the embodiment of the present invention one and two;
The longitudinal sectional drawing of the double-jacket tube that Fig. 2 provides for the embodiment of the present invention one and two;
Reference character: pipe, 103-ventilation duct, 201-guide ring, 202-through hole, 203-powder mound in 101-outer tube, 102-, the arrow wherein shown in Fig. 2 is the flow direction of powders material air-flow.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly; clear, complete description is carried out below by technological scheme of the present invention; based on the embodiment in the present invention; other mode of executions all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the present invention protects.
Please refer to Fig. 1 and Fig. 2, this double-jacket tube provided by the invention, comprise interior pipe 102 and outer tube 101; Described interior pipe 102 is set in described outer tube 101, and the outer wall of described interior pipe 102 and the inwall of described outer tube 101 fit; The inwall of described interior pipe 102 is provided with multiple in turn, coaxially arrangement and the ventilation duct 103 run through by described interior pipe 102; Further, the mouth of pipe at the two ends of each described ventilation duct 103 communicates with the inner chamber of described interior pipe 102; The inwall being in the described interior pipe 102 often between adjacent two ventilation ducts 103 is provided with guide ring 201, described guide ring 201 is provided with through hole 202; Described interior pipe 102, described ventilation duct 103 and described guide ring 201 are one-body molded; On above-mentioned basis, double-jacket tube of the present invention can combine with the next item down or all restriction contents simultaneously: in order to realize higher compression resistance, and the weight of pipe 102 in reducing as much as possible, preferably, the thickness of described interior pipe 102 with the ratio of the thickness of described outer tube 101 is: 7/8-5/3; The thickness of described ventilation duct 103 is equal with the thickness of described interior pipe 102.In addition, for the ease of shaping, and be easy to realize turbulent flow, preferably, the length of all described ventilation ducts 103 is equal, and the mouth of pipe of all described ventilation ducts 103 is inclined-plane (and the angle of its axis is between 40-50 °); Preferably, in order to meet the guide performance (ensure that a part of air-flow passes through smoothly, and some solid particulate matters wherein being fallen by stopping) of guide ring 201; Described guide ring 201 is vertically set on the inwall of described interior pipe 102, and its one end away from the inwall of described interior pipe 102 is concordant away from the side of described interior pipe 102 with described ventilation duct 103; Meanwhile, described through hole 202 is arranged on the middle part of described guide ring 201, and its cross section is circular.In addition, in order to meet the demand of multi-specification, it be applied in actual dedusting with more multi-form specification as much as possible, preferably, the thickness of described guide ring 201 is 5-7mm, and it can alleviate the weight of interior pipe 102 simultaneously; The length of each described ventilation duct 103 is 400-550 millimeter.
This double-jacket tube provided by the invention, its construction package mainly comprises interior pipe 102 and outer tube 101, and outer tube 101, as supporting element, which provides the space of sheathed interior pipe 102, and interior pipe 102 is then the main structure of double-jacket tube; Concrete, the inwall of its outer wall and outer tube 101 fits, and its inwall is provided with multiple in turn, coaxially arrangement and the ventilation duct 103 run through by described interior pipe 102; All ventilation ducts 103 are coaxially arranged all in turn (a line arrangement, and all coaxial), and are run through by whole interior pipe 102 (length after all ventilation duct 103 one-tenth a line arrangements is consistent with the length of interior pipe 102).And there is the mouth of pipe communicated with the inner chamber of interior pipe 102 in each ventilation duct 103, like this in the process of dedusting, can form the secondary air channel that air feed flows through.In addition, due to be in the described interior pipe 102 often between adjacent two ventilation ducts 103 inwall on be provided with guide ring 201, described guide ring 201 is provided with through hole 202, like this, in the process of ventilating from one end of double-jacket tube to the other end, two often adjacent ventilation ducts 103 can be able to through by guide ring 201, and guide ring 201 itself also can stop portions solid particle, during using ventilation duct 103, guide ring 201 etc. as secondary air channel, turbulent flow can be formed, be convenient to solid particle drop and be deposited on bottom interior pipe 102, and reach dust removing effects.Even more important, due in the double-jacket tube of invention, interior pipe 102, ventilation duct 103 and the one-body molded setting of guide ring 201, it is integrally set in outer tube 101 (being specially outer tube 101 outer wall), and assemble in prestressing force with outer tube 101, and then overcome in prior art by tubule welding or be threaded in bassoon exist the caducous technical problem of tubule, improve the usability of double-jacket tube on the whole, extend its working life.
In addition, the present invention, also in conjunction with above-mentioned content, provides following specific embodiment to the composition of double-jacket tube:
Embodiment one
The double-jacket tube of the present embodiment, comprises interior pipe 102 and outer tube 101; Described interior pipe 102 is set in described outer tube 101, and the outer wall of described interior pipe 102 and the inwall of described outer tube 101 fit; The inwall of described interior pipe 102 is provided with multiple in turn, coaxially arrangement and the ventilation duct 103 run through by described interior pipe 102; Further, the mouth of pipe at the two ends of each described ventilation duct 103 communicates with the inner chamber of described interior pipe 102; The inwall being in the described interior pipe 102 often between adjacent two ventilation ducts 103 is provided with guide ring 201, described guide ring 201 is provided with through hole 202; Described interior pipe 102, described ventilation duct 103 and described guide ring 201 are one-body molded.
Embodiment two
The double-jacket tube of the present embodiment, comprises interior pipe 102 and outer tube 101; Described interior pipe 102 is set in described outer tube 101, and the outer wall of described interior pipe 102 and the inwall of described outer tube 101 fit; The inwall of described interior pipe 102 is provided with multiple in turn, coaxially arrangement and the ventilation duct 103 run through by described interior pipe 102; Further, the mouth of pipe at the two ends of each described ventilation duct 103 communicates with the inner chamber of described interior pipe 102; The inwall being in the described interior pipe 102 often between adjacent two ventilation ducts 103 is provided with guide ring 201, described guide ring 201 is provided with through hole 202; Described interior pipe 102, described ventilation duct 103 and described guide ring 201 are one-body molded.
Wherein, the thickness of described interior pipe 102 with the ratio of the thickness of described outer tube 101 is: 7/8-5/3; The thickness of described ventilation duct 103 is equal with the thickness of described interior pipe 102; The length of all described ventilation ducts 103 is equal, and the mouth of pipe of all described ventilation ducts 103 is inclined-plane; Described guide ring 201 is vertically set on the inwall of described interior pipe 102, and its one end away from the inwall of described interior pipe 102 is concordant away from the side of described interior pipe 102 with described ventilation duct 103; Described through hole 202 is arranged on the middle part of described guide ring 201, and its cross section is circular; The thickness of described guide ring 201 is 5-7mm; The length of each described ventilation duct 103 is 400-550 millimeter.
In addition, in the present embodiment, concrete, the thickness of outer tube 101 is: 6-8mm; And the thickness of interior pipe 102 is specifically between 7-10mm.
During equipment runs, main wind passage (entering from interior pipe 102), secondary air channel (entering from the ventilation duct 103 of end) is same malleation source of the gas, powder can because of from resedimentation, accumulate in pipeline bottom and become powder mound 203, and constantly increase and cause main wind passage sectional area to diminish, blast rises, namely air blast enters secondary air channel by secondary tunnel inlet (being in one end of inner multiple ventilation ducts 103), acted on by guide ring 201 and spraying from the other end of ventilation duct 103, form turbulent flow, disturbance segmentation forward is carried out to next turbulent unit to powder mound 203, by powder carry to terminal.When system two air channels out of service keep unimpeded, guarantee that next time starts smoothly.
Better applied to make the double-jacket tube of the above embodiment of the present invention, more effectively be applied in the field of dedusting, the present invention also provides embodiment three-ten one on the basis of above-described embodiment, the composition of interior pipe, ventilation duct and guide ring in the double-jacket tube of embodiment three-ten a pair above-described embodiment has carried out concrete restriction, is now described in detail and explains:
In order to make whole interior pipe, ventilation duct and guide ring have higher wear-resisting property, preferably, on the basis of above-described embodiment, internally pipe, ventilation duct and guide ring component composition gives following concrete restriction:
Embodiment three
On the basis of embodiment one, concrete, for interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises: 300 parts, carbon, chromium 300 parts, 50 parts, manganese, molybdenum 30 parts, 90 parts, nickel.
Embodiment four
On the basis of embodiment two, more specifically, for interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises: 370 parts, carbon, chromium 900 parts, 60 parts, manganese, molybdenum 120 parts, 95 parts, nickel.
Embodiment five
On the basis of embodiment one, more specifically, for interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises: 450 parts, carbon, chromium 1500 parts, 70 parts, manganese, molybdenum 300 parts, 100 parts, nickel.
In above embodiment three-five, due to carbon can improve hardness, chromium can improve hardness and corrosion resistance, manganese can improve mechanical strength, molybdenum is provided for the fine and closely woven degree of crystal increases, the decay resistance that nickel then can improve the toughness of product, copper can improve product.The double-jacket tube that embodiment three-embodiment five provides, in the process using pipe, ventilation duct and guide ring in mould-forming, product crystalline rate is 1-2.5 minute; Quenching temperature is 920 DEG C-970 DEG C, then can obtain fine and closely woven m in 370 DEG C of tempering
7c
3with the hardness of m crystal and HRC58-61, abrasion loss is 0.00012g/h, the abrasion resistance of this product be the 10-15 of the product of ordinary low-carbon steel material doubly.
In order to the performance making whole interior pipe, ventilation duct and guide ring have higher acid corrosion-resistant, preferably, on the basis of above-described embodiment 1-2, internally pipe, ventilation duct and guide ring component composition gives following concrete restriction:
Embodiment six
On the basis of embodiment two, concrete, for interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises: 210 parts, carbon, chromium 2000 parts, 50 parts, manganese, molybdenum 180 parts, 200 parts, nickel, copper 125 parts.
Embodiment seven
On the basis of embodiment two, concrete, for interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises: 245 parts, carbon, chromium 2600 parts, 75 parts, manganese, molybdenum 240 parts, 1000 parts, nickel, copper 160 parts.
Embodiment eight
On the basis of embodiment two, concrete, for interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises: 280 parts, carbon, chromium 3000 parts, 100 parts, manganese, molybdenum 300 parts, 1800 parts, nickel, copper composition 200 parts.
The double-jacket tube that embodiment six-embodiment eight provides, in the process using pipe, ventilation duct and guide ring in mould-forming, product crystalline rate is 1-2.5 minute; Quenching temperature is 920 DEG C-960 DEG C, then can obtain fine and closely woven m in 430 DEG C of tempering
7c
3+ m
23c
7with the hardness of m+A crystal, HRC50-56.This product can be applicable to the operating mode of not only wear-resisting but also antiacid corrosion, working life be the 15-20 of Stainless Steel Products doubly.
In order to the performance making whole interior pipe, ventilation duct and guide ring have higher alkali corrosion resistance, preferably, on the basis of above-described embodiment 1-2, internally pipe, ventilation duct and guide ring component composition gives following concrete restriction:
Embodiment nine
On the basis of embodiment two, concrete, for interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises: 280 parts, carbon, chromium 1000 parts, 50 parts, manganese, molybdenum 100 parts, 150 parts, nickel, copper 140 parts.
Embodiment ten
On the basis of embodiment two, concrete, for interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises: 315 parts, carbon, chromium 1250 parts, 65 parts, manganese, molybdenum 150 parts, 275 parts, nickel, copper 195 parts.
Embodiment 11
On the basis of embodiment two, concrete, for interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises: 350 parts, carbon, chromium 1500 parts, 80 parts, manganese, molybdenum 200 parts, 400 parts, nickel, copper 250 parts.
The double-jacket tube that embodiment nine-embodiment 11 provides, in the process utilizing pipe, ventilation duct and guide ring in mould-forming, product crystalline rate is 2-3.0 minute; Quenching temperature is 920 DEG C-950 DEG C, can obtain fine and closely woven m in 270 DEG C of tempering
7c
3+ m
23c
7with A+m crystal; Be applied to the not only wear-resisting but also operating mode of alkali resistant corrosion, working life be the 15-20 of Stainless Steel Products doubly.
To sum up, this double-jacket tube that the embodiment of the present invention provides, the one-body molded setting of interior pipe, ventilation duct and guide ring, it is integrally set in (being specially outer wall of inner tube) outer tube and is that prestressing force assembles with outer tube, and then overcome tubule welding or the caducous technical problem of tubule being threaded in existence in bassoon in prior art, improve the using function of double-jacket tube on the whole, extend its working life.And by internally pipe, ventilation duct and guide ring carry out the restriction of specific material composition, make it reach the technique effect of wear-resisting, acidproof/caustic corrosion, can effectively be applied in the filler pneumatic conveying operating mode of power station ash disposal, desulphurization system and other wear-resistant antiacid caustic corrosions.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a double-jacket tube, is characterized in that, comprises inner and outer tubes;
Described interior pipe box is located in described outer tube, and the outer wall of described interior pipe and the inwall of described outer tube fit;
The inwall of described interior pipe is provided with multiple in turn, coaxially arrangement and the ventilation duct run through by described interior pipe; Further, the mouth of pipe at the two ends of each described ventilation duct communicates with the inner chamber of described interior pipe;
The inwall being in the described interior pipe often between adjacent two ventilation ducts is provided with guide ring, described guide ring is provided with through hole; Described interior pipe, described ventilation duct and described guide ring are one-body molded.
2. double-jacket tube according to claim 1, is characterized in that, the thickness of described interior pipe with the ratio of the thickness of described outer tube is: 7/8-5/3; The thickness of described ventilation duct is equal with the thickness of described interior pipe.
3. double-jacket tube according to claim 2, is characterized in that, the length of all described ventilation ducts is equal, and the mouth of pipe of all described ventilation ducts is inclined-plane.
4. double-jacket tube according to claim 3, is characterized in that, described guide ring is vertically set on the inwall of described interior pipe, and its one end away from the inwall of described interior pipe is concordant away from the side of described interior pipe with described ventilation duct.
5. double-jacket tube according to claim 4, is characterized in that, described through hole is arranged on the middle part of described guide ring, and its cross section is circular.
6. double-jacket tube according to claim 5, is characterized in that, the thickness of described guide ring is 5-7mm.
7. the double-jacket tube according to any one of claim 1-6, is characterized in that, the length of each described ventilation duct is 400-550 millimeter.
8. double-jacket tube according to claim 7, is characterized in that, in described interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises:
Carbon 300-450 part, chromium 300-1500 part, manganese 50-70 part, molybdenum 30-300 part, nickel 90-100 part.
9. double-jacket tube according to claim 7, is characterized in that, in described interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises:
Carbon 210-280 part, chromium 2000-3000 part, manganese 50-100 part, molybdenum 180-300 part, nickel 200-1800 part, copper 125-200 part.
10. double-jacket tube according to claim 7, is characterized in that, in described interior pipe, ventilation duct and guide ring, according to weight parts, its component comprises:
Carbon 280-350 part, chromium 1000-1500 part, manganese 50-80 part, molybdenum 100-200 part, nickel 150-400 part, copper 140-250 part.
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