CN102494218A - Delivery elbow pipe and production method thereof - Google Patents
Delivery elbow pipe and production method thereof Download PDFInfo
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- CN102494218A CN102494218A CN2011104137989A CN201110413798A CN102494218A CN 102494218 A CN102494218 A CN 102494218A CN 2011104137989 A CN2011104137989 A CN 2011104137989A CN 201110413798 A CN201110413798 A CN 201110413798A CN 102494218 A CN102494218 A CN 102494218A
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Abstract
The invention provides a delivery elbow pipe and a production method thereof. The delivery elbow pipe comprises an outer elbow pipe (3), an inner elbow pipe (2) and a connecting flange, wherein the inner elbow pipe (2) is made of abrasion resisting materials and embedded inside the outer elbow pipe (3), at least one end of the inner elbow pipe (2) extends out of the outer elbow pipe (3) from the end portion of the outer elbow pipe (3), and the connecting flange is sleeved on the outer side of the end portion of the inner elbow pipe (2) and fixedly connected with the inner elbow pipe (2) and/or the outer elbow pipe (3). By means of the delivery elbow pipe, an abrasion resisting material layer integrally formed by the inner elbow pipe is free of seam, so that the delivery elbow pipe is capable of avoiding eddy caused in the position of the seam in the prior art and removing cavitation caused by the eddy accordingly.
Description
Technical field
The present invention relates to sticky material transportation art such as concrete, mud, more specifically, relate to the transporting elbow and the production method thereof of sticky materials such as a kind of concrete, mud.
Background technique
The transporting elbow working environment of sticky material such as concrete, mud is extremely abominable, and tube wall will bear the continuous circulating pressure of 10-12MPa and impact.In the existing technology, see also Fig. 1, adopt double-deck bend pipe usually, its by outer bend pipe 1 ', interior bend pipe 2 ', wear-resistant sleeve 3 ' and 6 ' and six component such as adpting flange 4 ' and 5 ' form.Its manufacture is: outer bend pipe 1 ', interior bend pipe 2 ' are embedded in together after making moulding respectively separately, afterwards adpting flange 4 ' and 5 ' are welded on the end face of outer bend pipe 1 ' respectively; At last wear-resistant sleeve 3 ' and 6 ' is embedded in the inside of adpting flange 4 ' and 5 ' respectively, and docks with interior bend pipe 2 '.
In the existing technology, there is seam in the interior bend pipe 2 ' of the formation wear-resistant material layer of transporting elbow with wear-resistant sleeve 3 ' and 6 ' joint, in material conveying process, can form eddy current at seam crossing, causes cavitation phenomenon, very easily damages seam crossing.And in process of production, need the gland operation for embedding wear-resistant sleeve 3 ' and 6 ', and prolonged manufacturing time, reduced manufacturing efficiency.
Summary of the invention
The object of the invention is to provide a kind of eddy current that can avoid the seam place to cause, eliminates the transporting elbow of consequent cavitation phenomenon.Further aim of the present invention is to provide a kind of gland technology that reduces between wear-resistant sleeve and the outer bend pipe, thereby reduces work hours, and increases substantially the method for the manufacturing transporting elbow of manufacturing efficiency.
The invention provides a kind of transporting elbow, it is characterized in that, comprising: outer bend pipe; Interior bend pipe is processed by high-abrasive material, and it is inner to be embedded in said outer bend pipe, said in bend pipe at least one end from said excurvation tube end reach said outside outside the bend pipe; Adpting flange is set in outside the end of said interior bend pipe, and is fixedly connected with said interior bend pipe and/or said outer bend pipe.
Further, said adpting flange comprises: first adpting flange, be set in said in the end outside of first end of bend pipe; Second adpting flange, be set in said in the end outside of second end of bend pipe.
Further, the external diameter of the end of said interior bend pipe forms stepped part less than the external diameter of the main body of bend pipe in said in said end, and said adpting flange is connected on the said stepped part.
Further, in said a side of the bending radius maximum of the minimum side bend pipe towards said in of the bending radius of bend pipe said in the wall thickness progressive additive of bend pipe.
Further, said high-abrasive material is a rich chromium cast iron.
Further, also comprise binding material between said interior bend pipe and the said outer bend pipe.
The present invention also provides a kind of method of making transporting elbow, comprises the steps: to adopt high-abrasive material to make interior bend pipe; Make outer bend pipe; Bend pipe in said is embedded in the said outer bend pipe, at least one end of said interior bend pipe from said excurvation tube end reach said outside outside the bend pipe; With adpting flange be set in said in the outside of end of bend pipe, and said adpting flange and said interior bend pipe and/or said outer bend pipe be fixed together.
Further, with adpting flange be set in said in the step in the end outside of bend pipe comprise: with first adpting flange be set in said in the outside, end of first end of bend pipe; Second adpting flange is set in the outside, end of second end of said interior bend pipe.
Further, adopt the step of bend pipe in the high-abrasive material manufacturing to comprise: to make the external diameter of the end of said interior bend pipe form stepped part in said end less than the external diameter of the main body of bend pipe in said; The step that adpting flange is set in the outside, end of said interior bend pipe comprises: said adpting flange is connected on the said stepped part.
Further, adopt the step of bend pipe in the high-abrasive material manufacturing to comprise: make said in the side of bending radius maximum of the minimum side bend pipe towards said in of the bending radius of bend pipe said in the wall thickness progressive additive of bend pipe.
Further, said high-abrasive material is a rich chromium cast iron.
Further, adopt the step of bend pipe in the high-abrasive material manufacturing to comprise the said interior bend pipe of employing lost foam casting process casting.
Further, the step of the outer bend pipe of making is included on the said outer bend pipe and bores fill orifice; The method of said manufacturing transporting elbow also comprises through said fill orifice injects the space between said interior bend pipe and the said outer bend pipe with binding material.
The step of further, outside said, boring fill orifice on the bend pipe is included in the maximum position of the bending radius of said outer bend pipe and the neutral position brill fill orifice at the position of bending radius minimum.
Further, through welding said adpting flange and said interior bend pipe and/or said outer bend pipe are linked together; The method of said manufacturing transporting elbow also comprises the welding slag polishing clean, the step of the binding material that cleaning is overflowed.
According to transporting elbow of the present invention, there is not seam by the integrally formed wear-resistant material layer of interior bend pipe, can avoid the eddy current that causes at seam crossing in the existing technology, thereby eliminate consequent cavitation phenomenon.According to the method for manufacturing transporting elbow of the present invention, compared with prior art reduce the gland technology between wear-resistant sleeve and the outer bend pipe, thereby reduced man-hour, increased substantially manufacturing efficiency.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the sectional structure schematic representation of the transporting elbow of existing technology;
Fig. 2 is the sectional structure schematic representation according to transporting elbow of the present invention.
Embodiment
Below with reference to accompanying drawing and combine embodiment to specify the present invention.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
As shown in Figure 2, transporting elbow of the present invention mainly comprises outer bend pipe 3, interior bend pipe 2 and adpting flange.Wherein, interior bend pipe 2 is processed by high-abrasive material, preferably, adopts the high-abrasive material of rich chromium cast iron as bend pipe 2 in making; Interior bend pipe 2 is embedded in outer bend pipe 3 inside, and at least one end of interior bend pipe 2 is outside outer bend pipe 3 ends reach outside the bend pipe 3; Adpting flange is set in the outside, end of interior bend pipe 2, and is fixedly connected by welding with outer bend pipe 3.Adpting flange comprises first adpting flange 1 in the outside, end that is set in interior bend pipe 2 first ends and second adpting flange 4 in the outside, end that is set in interior bend pipe 2 second ends.As shown in Figure 2: because wear-resistant material layer, has been avoided the interior bend pipe of transporting elbow and the seam between the wear-resistant sleeve in the existing technology by interior bend pipe 2 whole formation, thereby the eddy current that can avoid the seam place to cause is eliminated consequent cavitation phenomenon.Simultaneously, wear-resistant material layer is made as integral body, makes the transporting elbow of double-deck bend pipe form satisfy usage requirement, prolonged working life.
In the embodiment shown in the accompanying drawing 2; The external diameter of first end of interior bend pipe 2 and the end of second end forms stepped part respectively in the end less than the external diameter of the main body of interior bend pipe 2; And first adpting flange 1 and second adpting flange 4 have been connected to respectively on the corresponding stepped part.Connection in being provided with like this can make between bend pipe 2, outer bend pipe 4 and first adpting flange 1 and second adpting flange 4 is more firm.
Certainly, on the bend pipe 2, that is, form annexation between adpting flange and the interior bend pipe 2 in adpting flange of the present invention also can be fixedly connected on, perhaps adpting flange is fixed on interior bend pipe 2 and the outer bend pipe 3.And the present invention is not limited to this situation of all sheathed adpting flange at the two ends of interior bend pipe 2, only end of interior bend pipe 2 adopt aforesaid in assembly structure between bend pipe 2, outer bend pipe 3 and the adpting flange, also should be within protection scope of the present invention.
Because the external lateral portion of the interior bend pipe 2 of transporting elbow is that the relatively large part of bending radius is compared with the inside part of interior bend pipe 2; Can receive bigger impact and wearing and tearing; In order further to improve the life-span of transporting elbow; As shown in Figure 2, from the minimum side of the bending radius of interior bend pipe 2 towards the maximum side of the bending radius of interior bend pipe 2, the wall thickness progressive additive of interior bend pipe 2.
In the present embodiment, in order better interior bend pipe 2 and outer bend pipe 3 to be formed overall structure, binding materials such as cement have for example also been comprised between interior bend pipe 2 and the outer bend pipe 3.
Need to prove that transporting elbow of the present invention can be used for sticky materials such as delivering concrete, mud.
The method of manufacturing transporting elbow of the present invention mainly comprises the steps:
Adopt high-abrasive material to make interior bend pipe 2.Wherein preferably with rich chromium cast iron as high-abrasive material.And more preferably, adopt bend pipe 2 in the lost foam casting process casting.Impact because the inwall of interior bend pipe 2 will bear the continuous circulating pressure of 10～12MPa, require its hardness >=HRC64, therefore can select rich chromium cast iron for use is raw material; And use bend pipe 2 in the lost foam casting process casting wear-resistant, can make that casting surface is smooth, flawless, pore, slag inclusion, defective such as loose; Simultaneously, select lost foam casting process for use, can make the making of interior bend pipe 2 simple, thus the manufacturing efficiency of increasing substantially.
Make outer bend pipe 3.Interior bend pipe 2 and outside comprise between the bend pipe 3 under the situation of binding material such as cement for example; The step of making outer bend pipe 3 also is included on the outer bend pipe 3 bores fill orifice, and the bore position of fill orifice preferably is selected in the maximum position of the bending radius of outer bend pipe 3 and the neutral position at the position of bending radius minimum.The position of fill orifice is set like this, can guarantee preferably binding material interior bend pipe 2 and outside flow more uniformly between the bend pipe 3.Certainly the present invention do not limit simultaneously other position on the bend pipe 3 outside bore fill orifice or only outside other position on the bend pipe 3 bore fill orifice.Simultaneously preferably, more firm for the connection between each component that makes transporting elbow, the external diameter of the end of bend pipe 2 forms stepped part less than the external diameter of the main body of interior bend pipe 2 in the end in can making, so that connect with adpting flange; Be hit and the working life at the position that the degree of wear is big and then the whole service life of raising transporting elbow the wall thickness progressive additive of a side of the bending radius of bend pipe 2 minimum bend pipe 2 in a side of the bending radius maximum of interior bend pipe 2 in can also making in order to improve.
The outside of end of bend pipe 2 in adpting flange is set in, and with adpting flange and interior bend pipe 2 and/or outer bend pipe 3 through being welded together.In the present embodiment particularly, adpting flange is set in the step in the end outside of bend pipe 2 comprise: the outside, end of first end of bend pipe 2 in first adpting flange 1 is set in; Second adpting flange 4 is set in the outside, end of second end of interior bend pipe 2, to guarantee in wearing layer, not having seam.Have under the situation of step at interior bend pipe 2, can also adpting flange be connected on the stepped part.
At last, the method for making transporting elbow can also comprise with the welding slag polishing totally, clears up the step of the binding material that overflows.
Can find out that from above description the transporting elbow of the above embodiment of the present invention has been realized following technique effect: interior bend pipe wear-resistant material layer integral seamless, the eddy current that can avoid the seam place to cause is eliminated consequent cavitation phenomenon.Simultaneously, the method for the manufacturing transporting elbow of the above embodiment of the present invention has realized following technique effect: compared with prior art reduced the gland technology between wear-resistant sleeve and the outer bend pipe, thereby reduced man-hour, increased substantially manufacturing efficiency.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a transporting elbow is characterized in that, comprising:
Outer bend pipe (3);
Interior bend pipe (2) is processed by high-abrasive material, is embedded in said outer bend pipe (3) inside, said at least one end bend pipe (3) end outside said of bend pipe (2) reach said outside outside the bend pipe (3);
Adpting flange is set in outside the end of said interior bend pipe (2), and is fixedly connected with said interior bend pipe (2) and/or said outer bend pipe (3).
2. transporting elbow according to claim 1 is characterized in that, said adpting flange comprises:
First adpting flange (1), be set in said in the end outside of first end of bend pipe (2);
Second adpting flange (4), be set in said in the end outside of second end of bend pipe (2).
3. transporting elbow according to claim 1 and 2 is characterized in that, the external diameter of the end of said interior bend pipe (2) forms stepped part less than the external diameter of the main body of bend pipe (2) in said in said end, and said adpting flange is connected on the said stepped part.
4. transporting elbow according to claim 1 and 2 is characterized in that, in said a side of the bending radius maximum of the minimum side bend pipe (2) towards said in of the bending radius of bend pipe (2) said in the wall thickness progressive additive of bend pipe (2).
5. transporting elbow according to claim 1 and 2 is characterized in that, said high-abrasive material is a rich chromium cast iron.
6. transporting elbow according to claim 1 and 2 is characterized in that, also comprises binding material between said interior bend pipe (2) and the said outer bend pipe (3).
7. a method of making transporting elbow is characterized in that, comprises the steps:
Adopt high-abrasive material to make interior bend pipe (2);
Make outer bend pipe (3);
Bend pipe (2) in said is embedded in the said outer bend pipe (3), at least one end bend pipe (3) end outside said of said interior bend pipe (2) reach said outside outside the bend pipe (3);
With adpting flange be set in said in the outside of end of bend pipe (2), and said adpting flange and said interior bend pipe (2) and/or said outer bend pipe (3) be fixed together.
8. the method for manufacturing transporting elbow according to claim 7 is characterized in that, the step that adpting flange is set in the outside, end of said interior bend pipe (2) comprises:
First adpting flange (1) is set in the outside, end of first end of said interior bend pipe (2);
Second adpting flange (4) is set in the outside, end of second end of said interior bend pipe (2).
9. according to the method for claim 7 or 8 described manufacturing transporting elbows, it is characterized in that,
The step that adopts high-abrasive material to make interior bend pipe (2) comprises: make the external diameter of the end of said interior bend pipe (2) form stepped part less than the external diameter of the main body of bend pipe (2) in said in said end;
The step that adpting flange is set in the outside, end of said interior bend pipe (2) comprises: said adpting flange is connected on the said stepped part.
10. according to the method for claim 7 or 8 described manufacturing transporting elbows; It is characterized in that, adopt high-abrasive material make in the step of bend pipe (2) comprising: make said in the side of bending radius maximum of the minimum side bend pipe (2) towards said in of the bending radius of bend pipe (2) said in the wall thickness progressive additive of bend pipe (2).
11. the method according to claim 7 or 8 described manufacturing transporting elbows is characterized in that, said high-abrasive material is a rich chromium cast iron.
12. the method according to claim 7 or 8 described manufacturing transporting elbows is characterized in that, the step of bend pipe (2) comprised the said interior bend pipe (2) of employing lost foam casting process casting in the employing high-abrasive material was made.
13. the method according to claim 7 or 8 described manufacturing transporting elbows is characterized in that,
The step of making outer bend pipe (3) is included in said outer bend pipe (3) and goes up the brill fill orifice;
The method of said manufacturing transporting elbow also comprises through said fill orifice injects the space between said interior bend pipe (2) and the said outer bend pipe (3) with binding material.
14. the method for manufacturing transporting elbow according to claim 13; It is characterized in that the step that bend pipe outside said (3) go up to bore fill orifice is included in the maximum position of the bending radius of said outer bend pipe (3) and the neutral position brill fill orifice at the position of bending radius minimum.
15. the method for manufacturing transporting elbow according to claim 13 is characterized in that,
Through welding said adpting flange and said interior bend pipe (2) and/or said outer bend pipe (3) are linked together;
The method of said manufacturing transporting elbow also comprises the welding slag polishing clean, the step of the binding material that cleaning is overflowed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104137989A CN102494218A (en) | 2011-12-12 | 2011-12-12 | Delivery elbow pipe and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104137989A CN102494218A (en) | 2011-12-12 | 2011-12-12 | Delivery elbow pipe and production method thereof |
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| CN102494218A true CN102494218A (en) | 2012-06-13 |
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| CN2011104137989A Pending CN102494218A (en) | 2011-12-12 | 2011-12-12 | Delivery elbow pipe and production method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797929A (en) * | 2012-08-13 | 2012-11-28 | 青岛联大凯威管路系统有限公司 | Fluid pipeline |
| CN103672274A (en) * | 2013-12-10 | 2014-03-26 | 中联重科股份有限公司 | Conveying pipe and concrete conveying device |
| CN104121443A (en) * | 2013-04-28 | 2014-10-29 | 襄阳通威机械有限公司 | Crack filling method of compound bent pipe and abrasion-resistant compound bent pipe |
| CN104976475A (en) * | 2015-06-15 | 2015-10-14 | 淄博滕坤工贸有限公司 | High-alloy and wear-resistant double-layer bend for concrete pump truck |
| 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 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2219411Y (en) * | 1995-05-27 | 1996-02-07 | 西安建筑科技大学 | Bimetallic tube |
| US6520213B1 (en) * | 2001-09-04 | 2003-02-18 | Esser-Werke Kg | Arcuate double-layer pipe, and method of assembling an arcuate double-layer pipe |
| CN2649917Y (en) * | 2003-10-15 | 2004-10-20 | 赵志春 | Short wear-resistant elbow for ceramic-lined elbow pipe |
| WO2007048368A1 (en) * | 2005-10-27 | 2007-05-03 | Esser-Werke Gmbh & Co. Kg | Elbow pipe and method for producing an elbow pipe |
| CN101413604A (en) * | 2008-10-17 | 2009-04-22 | 江苏明雨耐磨材料有限公司 | Bimetal wear-resistant bent pipe and production method thereof |
| CN201354913Y (en) * | 2008-10-20 | 2009-12-02 | 天津天铁冶金集团有限公司 | Novel wear resisting elbow |
| CN201412608Y (en) * | 2009-05-19 | 2010-02-24 | 三一重工股份有限公司 | Wear-proof conveying pipe and concrete conveying machine with same |
| CN201531699U (en) * | 2009-08-04 | 2010-07-21 | 三一重工股份有限公司 | Transportation bent pipe and concrete conveying machinery with transportation bent pipe |
-
2011
- 2011-12-12 CN CN2011104137989A patent/CN102494218A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2219411Y (en) * | 1995-05-27 | 1996-02-07 | 西安建筑科技大学 | Bimetallic tube |
| US6520213B1 (en) * | 2001-09-04 | 2003-02-18 | Esser-Werke Kg | Arcuate double-layer pipe, and method of assembling an arcuate double-layer pipe |
| CN2649917Y (en) * | 2003-10-15 | 2004-10-20 | 赵志春 | Short wear-resistant elbow for ceramic-lined elbow pipe |
| WO2007048368A1 (en) * | 2005-10-27 | 2007-05-03 | Esser-Werke Gmbh & Co. Kg | Elbow pipe and method for producing an elbow pipe |
| CN101413604A (en) * | 2008-10-17 | 2009-04-22 | 江苏明雨耐磨材料有限公司 | Bimetal wear-resistant bent pipe and production method thereof |
| CN201354913Y (en) * | 2008-10-20 | 2009-12-02 | 天津天铁冶金集团有限公司 | Novel wear resisting elbow |
| CN201412608Y (en) * | 2009-05-19 | 2010-02-24 | 三一重工股份有限公司 | Wear-proof conveying pipe and concrete conveying machine with same |
| CN201531699U (en) * | 2009-08-04 | 2010-07-21 | 三一重工股份有限公司 | Transportation bent pipe and concrete conveying machinery with transportation bent pipe |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797929A (en) * | 2012-08-13 | 2012-11-28 | 青岛联大凯威管路系统有限公司 | Fluid pipeline |
| CN104121443A (en) * | 2013-04-28 | 2014-10-29 | 襄阳通威机械有限公司 | Crack filling method of compound bent pipe and abrasion-resistant compound bent pipe |
| CN104121443B (en) * | 2013-04-28 | 2016-06-22 | 襄阳通威机械有限公司 | A kind of composite-curve method for padding gap and wear-resisting composite-curve |
| CN103672274A (en) * | 2013-12-10 | 2014-03-26 | 中联重科股份有限公司 | Conveying pipe and concrete conveying device |
| CN104976475A (en) * | 2015-06-15 | 2015-10-14 | 淄博滕坤工贸有限公司 | High-alloy and wear-resistant double-layer bend for concrete pump truck |
| 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 |
| 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 |
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Application publication date: 20120613 |