CN206846104U - A kind of wear-resisting straight tube that can be eliminated welding and influence - Google Patents
A kind of wear-resisting straight tube that can be eliminated welding and influence Download PDFInfo
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- CN206846104U CN206846104U CN201720700446.4U CN201720700446U CN206846104U CN 206846104 U CN206846104 U CN 206846104U CN 201720700446 U CN201720700446 U CN 201720700446U CN 206846104 U CN206846104 U CN 206846104U
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Abstract
The utility model discloses a kind of wear-resisting straight tube that can be eliminated welding and influence, the wear-resisting straight tube includes：The wear-resisting straight tube includes：Protection outer tube (1), wear-resistant sleeve flange (2) and wear-resisting inner tube (3), the protection outer tube (1) is nested on the outside of the wear-resisting inner tube (3), the wear-resistant sleeve flange (2) is arranged on the end of the double-layer wear-resistant straight tube, the wear-resistant sleeve flange (2) includes outward flange and internal layer wear-resistant sleeve, the internal layer wear-resistant sleeve is contained in inside the outward flange and the internal layer wear-resistant sleeve is extending at least partially into the protection outer tube (1) inside, connect with the wear-resisting inner tube (3), the protection outer tube (1) welds together with the outward flange.Wear-resisting straight tube of the present utility model is as a result of new-type adpting flange, and in the welding process of flange and body, the internal layer abrasion-proof pipe of body will not be influenceed by welding heating and produce annealing phenomena, improve the anti-wear performance of pipeline.
Description
Technical field
A kind of wear-resisting straight tube structure for trandfer fluid state material is the utility model is related to, particularly one kind can disappear
The wear-resisting straight tube influenceed except welding.
Background technology
Abrasion-proof pipe is conveyed throughout industries such as electric power, metallurgy, coal, oil, chemical industry, building materials, machineries, works as wear-resistant pipe
When the big material of grindability is conveyed in road (such as lime-ash, coal dust, tantalite power), all asking in the presence of abrasion-proof pipe quick abrasion
Topic.
Present domestic concrete mixer abrasion-proof pipe is mainly following several：1. general material, single material, such as using general
The straight tube of logical Welded tube production, is completed by simple welding production can, although having the intensity and toughness of a bit, because of it
Wearability is poor, and service life is 5000-8000 cubes or so, is changed often, so as to have impact on operating efficiency, add
Cheng Chengben, through eliminating substantially；2. inwall quenching heat treatment is passed through using seamless steel steel pipe or steel alloy welded tube, to increase it
Anti-wear performance, present quenching pipe can improve to 20,000 to 2.5 ten thousand cubes or so of delivering concrete amount, be obtained with economic and practical
Market widely utilizes；3. introducing two-layer compound straight tube, inner tube material is through hardening steel alloy, and outer tube material is low-carbon alloy steel,
There is adpting flange at both ends, wear-resistant sleeve are inlaid with flange, shelf life is about at 40,000 to 4.5 ten thousand cubes or so, but this kind compound
Following defect be present in straight tube：The composite force of outer tube and inner tube is weaker, and after there is plugging in pumping procedure, operating personnel typically adopt
Take and take discharge end apart, comb is carried out by pump concrete or water, but inner tube is easily rushed out in the process.
In addition, existing abrasion-proof pipe during making, is required for installing adpting flange, and adpting flange is in order to protect
The steadiness of installation is demonstrate,proved, it is main at present to be installed by the way of welding, in the welding process of adpting flange, height can be produced
Temperature, and this high temperature tends to cause high-abrasive material that annealing phenomena occurs, and then cause the anti-wear performance of material to suffer damage.
Utility model content
The purpose of this utility model is to overcome above-mentioned problem, it is proposed that a kind of new abrasion-proof pipe, it is adopted
With a kind of new wear-resisting flange, solve wear-resisting flange during abrasion-proof pipe is attached to, cause abrasion-proof pipe anneal and then
The problem of influenceing service life.
It should be noted that " elimination " welding influence being previously mentioned in the utility model refers to trying one's best to a certain extent
The influence of welding is reduced, reduced, is not necessarily to that elimination can be fully achieved.
The utility model, which adopts the following technical scheme that, realizes its purpose：
A kind of wear-resisting straight tube that can be eliminated welding and influence, it is characterised in that the wear-resisting straight tube includes：Protection outer tube,
Wear-resistant sleeve flange and wear-resisting inner tube, the protection outer tube are nested on the outside of the wear-resisting inner tube, the wear-resistant sleeve flange installation
In the end of the wear-resisting straight tube, the wear-resistant sleeve flange includes outward flange and internal layer wear-resistant sleeve, and the internal layer wear-resistant sleeve holds
It is contained in inside the outward flange and the internal layer wear-resistant sleeve is extending at least partially into the protection outer tube and the wear-resisting inner tube
Connect or stretch into the wear-resisting inner tube, the protection outer tube welds together with the outward flange.
Preferably, the internal layer wear-resistant sleeve uses non-easy annealed material.
Preferably, the internal layer wear-resistant sleeve use rich chromium cast iron, ceramics, wear-resisting alloy steel or hard alloy in one kind or
It is a variety of to be made.
Preferably, the internal layer wear-resistant sleeve is including wear-resisting in wear-resistant sleeve at least one flange and one or more bodys
Set, wear-resistant sleeve matches with the outward flange in the flange is placed in the outward flange, in the body it is wear-resisting be placed on described in
The end of protection outer tube, wear-resistant sleeve uses between wear-resistant sleeve each other or in body in wear-resistant sleeve and body in the flange
Identical or different material is formed.
Preferably, the number of the internal layer wear-resistant sleeve is multiple that multiple internal layer wear-resistant sleeves are connected in order each other, and
At least one internal layer wear-resistant sleeve is contained in the protection outer tube.
Preferably, the number of the internal layer wear-resistant sleeve is 3-8, and the length of each internal layer wear-resistant sleeve is less than 50mm.
Preferably, the number of the internal layer wear-resistant sleeve is 5 or 6, and the length of each internal layer wear-resistant sleeve is 20-
40mm。
Preferably, the thickness of the internal layer wear-resistant sleeve at least above the wear-resisting interior tube thickness half, it is and small
In equal to 2/3rds of the wear-resisting interior tube thickness.
Preferably, the wear-resisting inner tube comprises at least pipeline section in porch, in exit in pipeline section and one or more
Pipeline section in portion, at least one anti-wear performance in the porch in pipeline section and exit in pipeline section are better than the middle part inner tube
Section, anti-wear performance of the anti-wear performance of pipeline section better than pipeline section in the exit in the porch.
Preferably, adjacent inner tube section joint has filling channel, and the straight tube also includes damping filled cavity, the damping
Filled cavity is protection outer tube and the folder dummy section formed between the two after the heterogeneous wear-resisting inner tube installation of segmented.
Preferably, the straight tube also includes damping packed layer, and the damping packed layer is filled in the damping filled cavity.
Described protection outer tube can be welded still pipe or seamless steel pipe.Preferably protection outer tube by low-alloy steel or in it is low
Carbon steel material is made.
The utility model uses a kind of new wear-resisting flange, solves abrasion-proof pipe in preparation process, because welding is drawn
Play the problem of abrasion-proof pipe annealing is impaired.The outward flange of wear-resisting flange uses welding material, it is preferred to use can low-temperature welding
Material, internal layer wear-resistant sleeve stretches into an outer tube part for pipeline, and using being not easy the material that is influenceed by the high temperature welded.
In addition, the utility model is in order to solve the problems, such as to be influenceed and in order to increase by casting length condition in casting process
Whole service life and the reduction wearing layer cost of raw material, can also use the heterogeneous wear-resisting inner tube of segmented；Segmented is heterogeneous resistance to
Mill inner tube is made up of filling channel, the wear-resisting inner tube in porch, the wear-resisting inner tube of the wear-resisting inner tube in middle part and exit；The wear-resisting inner tube in middle part
To be one or more；Wear-resisting inner tube and the wear-resisting inner tube in middle part, the wear-resisting inner tube of the wear-resisting inner tube in exit and middle part in porch
Or it is provided with filling channel between the wear-resisting inner tube in adjacent two middle part.
The wear-resisting inner tube of the wear-resisting inner tube in porch and exit is respectively by rich chromium cast iron, medium chrome cast iron, low-chromium cast-iron, wear-resisting casting
A kind of high-abrasive material in the high-abrasive materials such as iron, ceramics, hard alloy, bearing steel, steel alloy, high polymer material is made.Internal layer
Wear-resistant pipe by the way of heterogeneous segmentation, it is described it is heterogeneous refer to be unlike material between different wear-resisting pipeline sections, its benefit is rushes
Equivalent material need not be used by hitting the small place of power and the big place of impulsive force, save the cost of material in manufacture；Wherein enter
It is wear-resisting to be more than or equal to middle part at least one high-abrasive material anti-wear performance used of wear-resisting inner tube and the wear-resisting inner tube in exit at mouthful
Inner tube uses material, and whether identical the wear-resisting inner tube in porch and the wear-resisting inner tube in the exit material used be.
Damping filled cavity is that the heterogeneous wear-resisting inner tube of segmented is arranged on what protection outer tube was internally formed, and ultimate range control exists
Within 3mm；Preferably, the control of the ultimate range of damping filled cavity 4 refers to outer tube wall in 1--2mm, ultimate range here
The thickness of the packed layer formed between inner tube.
As a result of above technical scheme, the utility model preferably realizes its purpose, of the present utility model wear-resisting
Straight tube is adjusted due to being constructed to it, so in preparation process, (or will not be subject to by the high heat affecting welded
High heat affecting substantially reduces).
Wear-resisting straight tube of the present utility model can be applied not only to the conveying of the fluids such as concrete, can be also used for electric power,
The industry powdery state material such as metallurgy, coal, oil, chemical industry, building materials, machinery.
Brief description of the drawings
Fig. 1 is the overall structure diagram of wear-resisting straight tube of the present utility model.
Fig. 2 is a kind of diagrammatic cross-section of implementation of the wear-resisting straight tube of the utility model.
Fig. 3 is the diagrammatic cross-section of the wear-resisting straight tube another kind implementation of the utility model.
Fig. 4 is the cross-sectional view of wear-resisting adpting flange 2.
Reference：
| Reference numerals | Mark title | Reference numerals | Mark title |
| 1 | Protection outer tube 1 | 3-1 | Filling channel 3-1 |
| 2 | Wear-resisting adpting flange 2 | 4 | Damping filled cavity 4 |
| 2-1 | Outward flange 2-1 | ||
| 2-2 | Internal layer wear-resistant sleeve 2-2 | ||
| 3 | Wear-resisting inner tube 3 |
Embodiment
The utility model is described in detail below in conjunction with drawings and Examples, but therefore will be not of the present utility model
Protection domain is limited among the scope of embodiment description.
Embodiment 1：
As shown in Figure 1-2, the wear-resisting straight tube of the present embodiment includes：Protection outer tube 1, wear-resistant sleeve flange 2 and wear-resisting inner tube
3。
Protection outer tube 1 is nested on the outside of wear-resisting inner tube 3, and in the present embodiment, protection outer tube 1 is made of alloy steel material.
Protection outer tube 1 can also be made of any other welding material.
Wear-resistant sleeve flange 2 is arranged on the end of wear-resisting straight tube, and wear-resistant sleeve flange 2 includes outward flange 2-1 and internal layer is wear-resisting
2-2 is covered, internal layer wear-resistant sleeve 2-2 is contained in inside outward flange 2-1 and internal layer wear-resistant sleeve is extending at least partially into protection outer tube 1,
Connect with wear-resisting inner tube 3, the protection outer tube 1 welds together with the outward flange." internal layer wear-resistant sleeve is extending at least partially into guarantor
In shield outer tube 1 " refer to that internal layer wear-resistant sleeve will be longer than outward flange, the length of corresponding protection outer tube 1 is longer than the wear-resisting inner tube
3 or internal layer wear-resistant sleeve 2-2 is stretched into wear-resisting inner tube 3, and then when outward flange is fixed by way of welding with protection outer tube 1
When, welding position is located on the outside of wear-resistant sleeve, is not in contact with wear-resisting inner tube 3.
Internal layer wear-resistant sleeve will use non-easy annealed material, for example be made of rich chromium cast iron, ceramics or hard alloy, so
When outward flange and protection outer tube are welded, body will not be had an impact, or caused influence is relatively small, to wear-resisting
The life-span of inner tube is without excessive influence.
Internal layer wear-resistant sleeve 2-2 can be entirety construction or multiple wear-resistant sleeves it is connected in order.Multiple
In the case of internal layer wear-resistant sleeve 2-2, multiple internal layer wear-resistant sleeves are connected in order each other.
In the present embodiment, the number of internal layer wear-resistant sleeve is 4.Of course it is not excluded the number of internal layer wear-resistant sleeve can fit
Work as adjustment, for example be changed as needed within the scope of 3-12, the length of each internal layer wear-resistant sleeve is less than 50mm.It is excellent
Selection of land, the length of each internal layer wear-resistant sleeve more elect 30,35mm as between 20-40mm.
In addition, straight tube of the present utility model has continued to use the heterogeneous of the longitudinal divisionses formula of the Changsha mechanical Science and Technology Ltd. of talent
Tubular construction, there is filling channel 3-1 between wear-resisting inner tube 3, it is preferable that wear-resisting inner tube continues to be divided into the wear-resisting inner tube in porch, gone out
The wear-resisting inner tube of wear-resisting inner tube and middle part at mouthful, the performance of the wear-resisting inner tube in porch is better than both rear, the property of the wear-resisting inner tube in exit
The wear-resisting inner tube in middle part can be better than.
Adjacent inner tube section joint has filling channel 3-1, and straight tube also includes damping filled cavity 4, the damping filled cavity 4
For the folder dummy section formed between the two after protection outer tube 1 and the installation of wear-resisting inner tube 3.Straight tube also includes damping packed layer, described
Damping packed layer is filled in the damping filled cavity.
Wear-resisting adpting flange 2 of the present utility model refers to：Adpting flange installed in the both ends of protection outer tube 1；It is by flange
2-1 and wear-resistant sleeve 2-2 is formed；It acts on the connection installation for being easy for straight tube and the wearability for ensureing mouth end.
Wear-resistant sleeve 2-2 described in the utility model refers to：By rich chromium cast iron, low-chromium cast-iron, medium chrome cast iron, wear resistant cast iron,
A kind of manufactured wear-resistant sleeve in the high-abrasive material such as steel alloy, bearing steel, ceramics, hard alloy, high polymer material；Its effect is
Extend the service life of wear-resisting adpting flange 2 and improve sealing.Preferably, wear-resistant sleeve 2-2 is by non-easily annealing in high-abrasive material
High-abrasive material form.The construction of internal layer wear-resistant sleeve of the present utility model causes in straight tube preparation process, as much as possible in protection
Layer wear-resistant pipe, it is set to avoid being influenceed by welding high temperature.
Wear-resisting inner tube 3 described in the utility model refers to：The interior wear-resisting combination straight tube of wear-resisting straight tube, its material selection Gao Ge
Cast iron, medium chrome cast iron, low-chromium cast-iron, wear resistant cast iron, ceramics, hard alloy, bearing steel, steel alloy, high polymer material etc. are wear-resisting
Material；It is made up of filling channel 3-1, the wear-resisting inner tube of segmented；It, which is acted on, is solved in casting process by casting length condition
The wearability of the problem of influence and increase most easily-worn position simultaneously reduces the wearing layer cost of raw material.It should be noted that here
The internal layer wear-resistant sleeve and the wear-resisting inner tube of end mentioned can only with one of which, can also the two use.
Damping filled cavity 4 described in the utility model refers to：After protection outer tube 1 is installed with the heterogeneous wear-resisting inner tube 3 of segmented
The folder dead level formed between the two；It is filling damping, close material that it, which is acted on, and vibration-absorptive material can be pre-charged with, can also be
During concrete pumping, by Concrete Filled or on the basis of being pre-charged with, further filled by concrete.
In addition, wear-resisting inner tube 3 can be divided into including pipeline section in pipeline section in porch, exit and one or more middle parts
Interior pipeline section, at least one anti-wear performance in the porch in pipeline section and exit in pipeline section are better than the middle part inner tube
Section, anti-wear performance of the anti-wear performance of pipeline section better than pipeline section in the exit in the porch.
In addition, in another implementation more preferably, wear-resisting inner tube 3 by filling channel, the wear-resisting inner tube in porch,
The wear-resisting inner tube in middle part forms with the wear-resisting inner tube in exit, during the wear-resisting inner tube of the wear-resisting inner tube in porch and exit is better than by wearability
The material of the wear-resisting inner tube in portion is made.
Embodiment 2
As shown in figure 3, show that a kind of internal layer wear-resistant sleeve is constructed using the wear-resisting straight tube of unitary construction in the present embodiment.
As illustrated, protection outer tube 1 is nested on the outside of wear-resisting inner tube 3, in the present embodiment, protection outer tube 1 uses steel alloy
Material is made.Protection outer tube 1 can also be made of any other welding material.
Wear-resistant sleeve flange 2 is arranged on the end of wear-resisting straight tube, and wear-resistant sleeve flange 2 includes outward flange 2-1 and internal layer is wear-resisting
2-2 is covered, internal layer wear-resistant sleeve 2-2 is contained in inside outward flange 2-1 and internal layer wear-resistant sleeve is extending at least partially into protection outer tube 1,
Connect with wear-resisting inner tube 3, the protection outer tube 1 welds together with the outward flange.That is, internal layer wear-resistant sleeve will be longer than outer method
Orchid, the length of corresponding protection outer tube 1 is longer than the wear-resisting inner tube 3 or internal layer wear-resistant sleeve 2-2 is stretched into wear-resisting inner tube 3, enters
And when outward flange by way of welding with protection outer tube 1 fix when, welding position be located at wear-resistant sleeve outside, not with wear-resisting inner tube
3 directly contact.
Internal layer wear-resistant sleeve will use non-easy annealed material, for example be made of rich chromium cast iron, ceramics or hard alloy, so
When outward flange and protection outer tube are welded, body will not be had an impact, or caused influence is relatively small, to wear-resisting
The life-span of inner tube is without excessive influence.
Internal layer wear-resistant sleeve 2-2 can be entirety construction or multiple wear-resistant sleeves it is connected in order.Multiple
In the case of internal layer wear-resistant sleeve 2-2, multiple internal layer wear-resistant sleeves are connected in order each other.In the present embodiment, internal layer wear-resistant sleeve is by whole
Body is formed, and wear-resistant sleeve length is 50-200mm.
Although its principle is described in detail above in conjunction with preferred embodiment of the present utility model, art technology
Personnel are it should be understood that above-described embodiment is only the explanation to exemplary implementation of the present utility model, not to this practicality
The restriction of new scope.Details in embodiment does not form the limitation to the scope of the utility model, without departing substantially from this reality
In the case of with new spirit and scope, any equivalent transformation based on technical solutions of the utility model, simple replacement etc. are aobvious
And the change being clear to, all fall within scope of protection of the utility model.
Claims (10)
1. a kind of wear-resisting straight tube that can be eliminated welding and influence, it is characterised in that the wear-resisting straight tube includes：Protection outer tube (1),
Wear-resistant sleeve flange (2) and wear-resisting inner tube (3), the protection outer tube (1) is nested on the outside of the wear-resisting inner tube (3), described resistance to
Grinding set flange (2) is arranged on the end of the wear-resisting straight tube, and the wear-resistant sleeve flange (2) includes outward flange and internal layer is wear-resisting
Set, the internal layer wear-resistant sleeve is contained in inside the outward flange and the internal layer wear-resistant sleeve is extending at least partially into outside the protection
Connect in pipe (1) with the wear-resisting inner tube (3) or stretch into the wear-resisting inner tube (3), the protection outer tube (1) and the outer method
Orchid welds together.
2. the wear-resisting straight tube according to claim 1 that welding can be eliminated and influenceed, it is characterised in that the internal layer wear-resistant sleeve
Using non-easy annealed material.
3. the wear-resisting straight tube according to claim 2 that welding can be eliminated and influenceed, it is characterised in that the internal layer wear-resistant sleeve
It is made of the one or more in rich chromium cast iron, ceramics, wear-resisting alloy steel or hard alloy.
4. the wear-resisting straight tube that can be eliminated welding and influence according to any one in claim 1-3, it is characterised in that institute
Stating internal layer wear-resistant sleeve includes at least one flange wear-resistant sleeve in wear-resistant sleeve and one or more bodys, wear-resistant sleeve in the flange
Match and be placed in the outward flange with the outward flange, the wear-resisting end for being placed on the protection outer tube (1), institute in the body
State in flange that wear-resistant sleeve uses identical or different material structure between wear-resistant sleeve each other or in body in wear-resistant sleeve and body
Into.
5. the wear-resisting straight tube that can be eliminated welding and influence according to any one in claim 1-3, it is characterised in that institute
The number for stating internal layer wear-resistant sleeve is multiple, and multiple internal layer wear-resistant sleeves are connected in order each other, and at least one internal layer is wear-resisting
Set is contained in the protection outer tube (1).
6. the wear-resisting straight tube according to claim 5 that welding can be eliminated and influenceed, it is characterised in that the internal layer wear-resistant sleeve
Number be 3-8, the length of each internal layer wear-resistant sleeve is less than 50mm.
7. the wear-resisting straight tube according to claim 6 that welding can be eliminated and influenceed, it is characterised in that the internal layer wear-resistant sleeve
Number be 5 or 6, the length of each internal layer wear-resistant sleeve is 20-40mm.
8. the wear-resisting straight tube according to claim 1 that welding can be eliminated and influenceed, it is characterised in that the internal layer wear-resistant sleeve
Thickness at least above the wear-resisting interior tube thickness half, and less than or equal to the wear-resisting interior tube thickness three/
Two.
9. the wear-resisting straight tube that can be eliminated welding and influence according to any one in claim 1-3, it is characterised in that institute
Wear-resisting inner tube (3) is stated including at least pipeline section in pipeline section in pipeline section in porch, exit and one or more middle parts, it is described enter
At least one anti-wear performance at mouthful in pipeline section and exit in pipeline section is better than pipeline section in the middle part, in the porch
Anti-wear performance of the anti-wear performance of pipeline section better than pipeline section in the exit.
10. the wear-resisting straight tube that can be eliminated welding and influence according to any one in claim 1-3, it is characterised in that
Adjacent inner tube section joint has filling channel (3-1), and the straight tube also includes damping filled cavity (4), the damping filled cavity
(4) it is protection outer tube (1) and the folder dummy section formed between the two after heterogeneous wear-resisting inner tube (3) installation of segmented, the straight tube
Also include damping packed layer, the damping packed layer is filled in the damping filled cavity.
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710066063 | 2017-02-06 | ||
| CN2017100660630 | 2017-02-06 | ||
| CN201720571891 | 2017-05-22 | ||
| CN2017205718915 | 2017-05-22 | ||
| CN201720572705 | 2017-05-22 | ||
| CN201720572001 | 2017-05-22 | ||
| CN2017205720012 | 2017-05-22 | ||
| CN201720572705X | 2017-05-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206846104U true CN206846104U (en) | 2018-01-05 |
Family
ID=60798989
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720700446.4U Active CN206846104U (en) | 2017-02-06 | 2017-06-16 | A kind of wear-resisting straight tube that can be eliminated welding and influence |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018171811A1 (en) * | 2017-03-21 | 2018-09-27 | 周朝辉 | Method for preparing sectional-type high abrasion resistant double-layered straight pipe and corresponding abrasion resistant straight pipe |
| CN110125613A (en) * | 2018-02-09 | 2019-08-16 | 周朝辉 | A kind of abrasion-proof pipe preparation method based on high-carbon high-chromium steel |
-
2017
- 2017-06-16 CN CN201720700446.4U patent/CN206846104U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018171811A1 (en) * | 2017-03-21 | 2018-09-27 | 周朝辉 | Method for preparing sectional-type high abrasion resistant double-layered straight pipe and corresponding abrasion resistant straight pipe |
| EP3604878A4 (en) * | 2017-03-21 | 2021-01-13 | Zhaohui Zhou | Method for preparing sectional-type high abrasion resistant double-layered straight pipe and corresponding abrasion resistant straight pipe |
| US11359758B2 (en) | 2017-03-21 | 2022-06-14 | Zhaohui Zhou | Sectional-type high wear-resistant double-layer straight tube and a method for preparing the same |
| JP2020521085A (en) * | 2017-05-22 | 2020-07-16 | 周朝▲輝▼ＺＨＯＵ， Ｚｈａｏｈｕｉ | Method of manufacturing split type high wear resistant double layer straight pipe and corresponding wear resistant straight pipe |
| JP7266303B2 (en) | 2017-05-22 | 2023-04-28 | 周朝▲輝▼ | Manufacturing method of split-type highly wear-resistant double-layer straight pipe and corresponding wear-resistant straight pipe |
| CN110125613A (en) * | 2018-02-09 | 2019-08-16 | 周朝辉 | A kind of abrasion-proof pipe preparation method based on high-carbon high-chromium steel |
| CN110125613B (en) * | 2018-02-09 | 2021-02-19 | 周朝辉 | Preparation method of wear-resistant pipeline based on high-carbon high-chromium steel |
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