CN103115200A - Concrete delivery pipe and manufacturing method thereof - Google Patents

Concrete delivery pipe and manufacturing method thereof Download PDF

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Publication number
CN103115200A
CN103115200A CN201310056986XA CN201310056986A CN103115200A CN 103115200 A CN103115200 A CN 103115200A CN 201310056986X A CN201310056986X A CN 201310056986XA CN 201310056986 A CN201310056986 A CN 201310056986A CN 103115200 A CN103115200 A CN 103115200A
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China
Prior art keywords
supervisor
flange
connecting tube
delivery pipe
manufacture method
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CN201310056986XA
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CN103115200B (en
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刘延斌
葛建光
李飞
杨伟
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Zoomlion Heavy Industry Science and Technology Co Ltd
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Zoomlion Heavy Industry Science and Technology Co Ltd
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Abstract

The invention discloses a concrete delivery pipe. The concrete delivery pipe comprises a main pipe and a flange. The flange comprises a connecting pipe and a flange plate located at one end of the connecting pipe. The connecting pipe is sleeved to the main pipe. The concrete delivery pipe further comprises a fiber composite layer which is sleeved to the main pipe and the connecting pipe to fix the flange on the main pipe. The fiber composite layer comprises resin matrix and monofilament fiber. The invention further provides a manufacturing method of the concrete delivery pipe. The flange is fixed on the main pipe through the fiber composite layer with no need of high temperature, so that texture and wear resistance of the main pipe are unaffected.

Description

Concrete delivery pipe and manufacture method thereof
Technical field
The present invention relates to the transportation art of material, particularly, relate to a kind of concrete delivery pipe for delivery of sticky material and a kind of manufacture method of making this concrete delivery pipe.
Background technique
Usually, concrete delivery pipe is for delivery of the material of liquid or thickness.For example, at building field, usually utilize the concrete delivery pipe delivering concrete.Described concrete delivery pipe comprises supervisor and flange, and this flange comprises connecting tube and the flange that is formed on this connecting tube one end, and described connecting tube is socketed in described supervisor's a end.
In the prior art, can make described concrete delivery pipe according to following dual mode: quench to described supervisor (1), the end welded flange of then being responsible for; (2) first at supervisor's end welded flange, then described supervisor is being quenched.
For method (1), the heat that produces during welded flange can cause that supervisor produces stress relief annealing, thereby can reduce supervisor's wear resistance; And can cause being responsible for the end material structure and change due to when welding for method (2), therefore, be difficult to control the tissue after supervisor quenches.
Therefore, how under the prerequisite that does not reduce supervisor's inwall wear-resisting property, flange is arranged on and becomes the technical problem that related domain needs to be resolved hurrily on supervisor.
Summary of the invention
The purpose of this invention is to provide the manufacture method of a kind of concrete delivery pipe and this concrete delivery pipe, supervisor's inwall of described concrete delivery pipe has wear-resisting property preferably, and flange and supervisor are connected firmly.
To achieve these goals, as one aspect of the present invention, a kind of concrete delivery pipe is provided, and this concrete delivery pipe comprises supervisor and flange, and this flange comprises connecting tube and flange plate, this flange plate morpheme is in an end of described connecting tube, described concrete delivery pipe also comprises the fibrous composite layer, wherein, and described connecting tube and described supervisor socket, this fibrous composite layer and described supervisor and the socket of described connecting tube, described fibrous composite layer comprises resin matrix and monfil.
Preferably, described monfil is one or more in glass fibre, superhigh molecular weight polyethylene fibers, carbon fiber, basalt fibre and aramid fibre.
Preferably, described resin matrix is formed by thermosetting resin cured.
Preferably, described thermosetting resin is epoxy resin.
Preferably, be provided with the described monfil of multilayer in described fibrous composite layer.
Preferably, the outer surface of the internal surface of described fibrous composite layer and described supervisor's outer surface and described connecting tube fits, and is formed with serrated-surface on described supervisor and described connecting tube and the contacted outer surface of described fibrous composite layer.
Preferably, described supervisor's inwall is formed with quench-hardened case, and the thickness of this quench-hardened case is 1/3rd to 1/2nd of described supervisor's wall thickness.
Preferably, described flange also comprises wear-resistant sleeve, and this wear-resistant sleeve is arranged in the through hole of described flange, and docks with described supervisor.
As another aspect of the present invention, a kind of manufacture method according to concrete delivery pipe provided by the present invention also is provided, wherein, this manufacture method comprises the following steps:
Step 1, described flange is socketed in described supervisor's a end;
Step 2, described monfil is immersed in the resin that forms described resin matrix, to obtain the fiber prepreg material;
Step 3, described fiber prepreg material is wrapped on described connecting tube and described supervisor's outer surface, solidifies and obtain described fibrous composite layer.
Preferably, described step 3 comprises that the described connecting tube to the described supervisor who is wound with described fiber prepreg material and described flange heats, and makes described resin solidification, to form described fibrous composite layer on described connecting tube and described supervisor's outer surface.
Preferably, when being wound around described fiber prepreg material in described step 3, three layers of described fiber prepreg material of every winding are wound around the described monfil of one deck.
Preferably, the angle between the tangential and described supervisor's of the bearing of trend of every described monfil length direction is that 10 degree are to 20 degree
Preferably, also comprise vacuumizing step between described step 2 and described step 3, this vacuumizes step and comprises:
Step 1), the described supervisor that will be wound with described fiber prepreg material and described flange seal are arranged in seal arrangement;
Step 2), described seal arrangement is vacuumized, make the air pressure in described seal arrangement reach 10 -3Pa to 10 -2Pa.
Preferably, vacuumize step described, in described step 1) and described step 2) between also comprise the step that the described supervisor who is wound with described fiber prepreg material in described sealing package and described flange are carried out preheating, preheating temperature is 80 ℃ to 100 ℃, holding time is 30min to 60min.
Preferably, described seal arrangement is rubber bag.
Preferably, in described step 3, described supervisor and the described connecting tube that is wound with described fiber prepreg material is heated to 165 ℃ to 185 ℃, and is incubated 1 hour to 2 hours, so that described resin solidification.
Preferably, this manufacture method is included in the surface treatment step of carrying out before described step 2, and this surface treatment step comprises: forming described serrated-surface on the outer surface of described connecting tube and on described supervisor's outer surface.
Preferably, described step 1) comprise by spot welding described flange is fixed on described supervisor.
Preferably, described manufacture method is carried out induction hardened step to described supervisor before being included in described step 1, so that described supervisor's inwall forms described quench-hardened case.
Utilizing the fibrous composite layer that flange is fixed on supervisor did not need hot environment when upper, therefore can supervisor's tissue not impacted, and therefore can not affect supervisor's wear-resisting property.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the main sectional view of concrete delivery pipe of the present invention;
Fig. 2 is the main sectional view of the concrete delivery pipe shown in Fig. 1;
Fig. 3 is the enlarged view at the I place of the concrete delivery pipe shown in Fig. 1.
Description of reference numerals
10 supervisor's 20 flanges
21 connecting tube 22 flange plate
23 wear-resistant sleeve 30 fibrous composite layers
40 solder joints
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
As depicted in figs. 1 and 2, as one aspect of the present invention, a kind of concrete delivery pipe is provided, this concrete delivery pipe comprises supervisor 10 and flange 20, this flange 20 comprises connecting tube 21 and flange plate 22, this flange plate 22 is positioned at an end of connecting tube 21, described concrete delivery pipe also comprises fibrous composite layer 30, wherein, connecting tube 21 and supervisor's 10 sockets, fibrous composite layer 30 and supervisor 10 and connecting tube 21 sockets, so that described flange 20 is fixed on described supervisor 10, described fibrous composite layer 30 comprises resin matrix and monfil.
As shown in fig. 1, the connecting tube 21 of flange 20 is socketed in supervisor's end of 10, and fibrous composite layer 30 be tubulose, with around and cover and be responsible on 10 outer surface and on the outer surface of connecting tube 21.
When utilizing fibrous composite layer 30 flange 20 to be fixed on supervisor 10, do not need too high temperature environment, therefore can not affect supervisor 10 material structure, therefore can not reduce supervisor 10 wear resistance yet.
In the present invention, fibrous composite layer 30 can cover the whole outer surface of connecting tube 21, also can only cover the part (as shown in Figure 1) of the outer surface of connecting tube 21, similarly, fibrous composite layer 30 can cover whole outer surface of the supervisor 10, also can only cover the part of supervisor 10 outer surface.Should be noted in the discussion above that fibrous composite layer 30 is continuous on supervisor 10 length direction, thereby flange 20 can be fixed on supervisor 10.
Fibrous composite layer 30 can be the composite material that only is composited by resin matrix and monfil, also can be composited for resin matrix, monfil and other additives (for example, curing agent etc.).Comprise the monfil with higher-strength due to fibrous composite layer 30, therefore, fibrous composite layer 30 has enough intensity.
In the present invention, have enough intensity in order to make fibrous composite layer 30, preferably, monfil is one or more that are selected from glass fibre, superhigh molecular weight polyethylene fibers, carbon fiber, basalt fibre and aramid fibre.
Preferably, carbon fiber composite has lightweight, high strength, high rigidity, good vibration damping, endurance and the series of advantages such as corrosion-resistant.
In the present invention, can add curing agent in the resin that forms resin matrix, then monfil is immersed in and form the fiber prepreg material in resin matrix.Subsequently uncured fiber prepreg material utilized the Wet Winding Process method to be wrapped on the outer surface of at least a portion of connecting tube 21 and be responsible on the outer surface of at least a portion of 10.After being wound around described fiber prepreg material, can be with standing a period of time of described concrete delivery pipe, make the resin solidification in the fiber prepreg material form resin matrix, and then obtain fibrous composite layer 30, this fibrous composite layer 30 is bonded on connecting tube 21 and supervisor 10, and will both be fixedly connected with.。
Described monfil can be compounded to form carbon fiber composite with various matrix resins, and this matrix resin is such as thinking unsaturated polyester, vinylite, phenolic resin etc.
Preferably, can select thermosetting resin as the resin material that forms described resin matrix.Monfil is immersed in after the fiber prepreg material that forms in resin is wrapped on connecting tube 21 and supervisor 10, can heat the fiber prepreg material, make resin solidification form resin matrix, thereby obtain fibrous composite layer 30, and connecting tube 21 and supervisor 10 are fixed together.If quench to being responsible for 10, heating described fiber prepreg material can also be to being responsible for 10 effects of playing the part stress relief annealing.But the solidifying temperature of thermosetting resin can not produce excessive impact to being responsible for 10 hardened structure usually between 100 ℃ to 200 ℃, can not make supervisor 10 softening.
Preferably, can adopting process better, intensity is higher and toughness preferably epoxy resin as the thermosetting resin that forms described resin matrix.
In order to increase the intensity of fibrous composite layer 30, preferably, the described monfil of multilayer can be set in fibrous composite layer 30.
In concrete delivery pipe provided by the present invention, the internal surface of fibrous composite layer 30 fits with supervisor 10 outer surface and the outer surface of connecting tube 21, in order to increase the area of contact of fibrous composite layer 30 and connecting tube 21, preferably, can carry out roughening treatment with the contacted outer surface of fibrous composite layer 30 supervisor 10 and connecting tube 21, make on supervisor 10 and connecting tube 21 and the contacted outer surface of fibrous composite layer 30 to be formed with serrated-surface (as shown in Figure 3).Fibrous composite layer 30 is larger with connecting tube 21 and supervisor's 10 area of contact, and adhesive strength is higher.
Common described concrete delivery pipe is used for the higher materials of viscosity such as delivering concrete, in order to strengthen supervisor 10 wear-resisting property, preferably, supervisor 10 inwall can be formed with quench-hardened case, and the thickness of this quench-hardened case is 1/3rd to 1/2nd of described supervisor's 10 wall thickness.
Similarly, in order to improve the wear-resisting property of flange 20, flange 20 can also comprise wear-resistant sleeve 23, and this wear-resistant sleeve 23 is arranged in the through hole of described flange 20, and docks with described supervisor 10.
As another aspect of the present invention, a kind of manufacture method of concrete delivery pipe also is provided, wherein, this concrete delivery pipe is above-mentioned concrete delivery pipe provided by the present invention, described manufacture method comprises the following steps:
Step 1, flange 20 is socketed in supervisor's end of 10;
Step 2, described monfil is immersed in the resin that forms described resin matrix, to obtain the fiber prepreg material;
Step 3, described fiber prepreg material is wrapped on described connecting tube 21 and described supervisor's 10 outer surface, solidifies and obtain described fibrous composite layer 30, so that described flange 20 is fixed on described supervisor 10.
Temperature required when described fiber prepreg material solidifies is lower, therefore can not affect supervisor 10 tissue, and fibrous composite layer 30 is bonded on the connecting tube 21 of supervisor 10 and flange 20, and the join strength that reaches can be provided.
As noted before, preferably, the resin that forms resin matrix is thermosetting resin, in this case, described step 3 also comprises the supervisor 10 who is wound with described fiber prepreg material and connecting tube 21 is heated, make described resin solidification, to form described fibrous composite layer 30 on connecting tube 21 and supervisor's 10 outer surface.In the present invention, can utilize common resistance-heated furnace that connecting tube 21 and the supervisor 10 who is wound with the fiber prepreg material heated.
Comprise hardened structure if be responsible for 10, in heating during described fiber prepreg material makes described thermosetting resin cured process, can also carry out the part stress relief annealing to being responsible for 10 hardened structure, improve supervisor 10 toughness.The temperature required due to described fiber prepreg material curing is lower, therefore, can not reduce supervisor 10 hardness.
As noted before, in order to improve the intensity of fibrous composite layer 30, preferably, can comprise the described monfil of multilayer in fibrous composite layer 30.In order to reach this effect, the described fiber prepreg material of multilayer can be wound around at least a portion outer surface of supervisor 10 and at least a portion outer surface of connecting tube 21.In order to save the consumption of resin, preferably, when being wound around described fiber prepreg material in described step 3, three layers of described fiber prepreg material of every winding are wound around the described monfil of one deck.
Preferably, the angle between the tangential and supervisor's 10 of the bearing of trend of every described monfil length direction is that 10 degree are to 20 degree.That is, monfil is wrapped on supervisor 10 obliquely, makes the intensity of supervisor's length direction of 10 and the intensity of axial direction all be strengthened.
For fibrous composite layer 30 closely is fitted on the outer surface of supervisor 10 and connecting tube 21, preferably, also comprise vacuumizing step between described step 2 and described step 3, this vacuumizes step and comprises:
Step 1), the described supervisor 10 that will be wound with described fiber prepreg material and 20 sealings of described flange are arranged in seal arrangement;
Step 2), described seal arrangement is vacuumized.
In the present invention, seal arrangement should be flexible, that is, along with the carrying out that vacuumizes, seal arrangement can be out of shape, and is fitted on the fiber prepreg material.In the present invention, seal arrangement can be flexible sealing package.After the sealing bag was vacuumized, sealing package was out of shape and is fitted on the fiber prepreg material.Due to the pressure of the sealing package outside pressure greater than sealing package inside, barometric pressure can produce pressure to described fiber prepreg material, thereby the fiber prepreg material closely is fitted on the outer surface of supervisor 10 and connecting tube 21.After the resin solidification of described fiber prepreg material, sealing package can be removed.
Usually, through described vacuumize step after, the air pressure in described sealing package can be 10 -3Pa to 10 -2Pa.
In order to discharge the air in described fiber prepreg material, preferably, vacuumize step described, in described step 1) and described step 2) between also comprise the step that the described supervisor 10 who is wound with described fiber prepreg material in described sealing package and described flange 20 are carried out preheating, preheating temperature is 80 ℃ to 100 ℃, and holding time is 30min to 60min.After described fiber prepreg material is carried out preheating, can described monfil is softening, monfil is neatly arranged, and discharge the air of the remnants in described fiber prepreg material, improve the intensity of the fibrous composite layer after solidifying.
In the present invention, seal arrangement should be high temperature resistant, and can not be bonded together with thermosetting resin.As one embodiment of the present invention, described seal arrangement can be rubber bag.
After described fiber prepreg material is carried out preheating, in described step 3, described supervisor 10 and the described connecting tube 21 that is wound with described fiber prepreg material is heated to 165 ℃ to 185 ℃, and is incubated 1 hour to 2 hours, so that described resin solidification.Should be understood that, described sealing package is not removed in described step 3 kind.
As noted before, in order to increase the area of contact of fibrous composite layer 30 and supervisor 10 and connecting tube 21, preferably, described manufacture method can also be included in the surface treatment step of carrying out before described step 2, and this surface treatment step comprises: forming described serrated-surface on the outer surface of described connecting tube 21 and/or on described supervisor 10 outer surface.In the present invention, can adopt the method for turning to form described serrated-surface.
In order to ensure the accuracy that connects, before being wound around described fiber prepreg material, flange 20 can be fixed on supervisor 10.At this moment, preferably, described step 1 comprises by spot welding described flange 20 is fixed on described supervisor 10.Spot welding heat-affected zone is less, can not produce too much influence to being responsible for 10 tissue.As shown in Figure 2,4 solder joints 40 can be set on flange 20, thereby flange 20 is fixed on supervisor 10.
As noted before, in order to improve supervisor 10 wear resistance, can form quench-hardened case on supervisor 10 inwall.In order to control the thickness of quench-hardened case, preferably, can utilize induction hardened method to carry out Quenching Treatment to being responsible for 10.That is, described manufacture method also is included in carries out induction hardened step to being responsible for 10 before described step 1, forms described quench-hardened case so that be responsible for 10 inwall.
Utilizing the fibrous composite layer that flange is fixed on supervisor did not need hot environment when upper, therefore can supervisor's tissue not impacted, and therefore can not affect supervisor's wear-resisting property.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned mode of execution; in technical conceive scope of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characteristics described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (19)

1. concrete delivery pipe, this concrete delivery pipe comprises: supervisor (10) and flange (20), this flange (20) comprises connecting tube (21) and flange plate (22), this flange plate (22) is positioned at an end of described connecting tube (21), described connecting tube (21) and described supervisor (10) socket, described concrete delivery pipe also comprises fibrous composite layer (30), it is characterized in that, described fibrous composite layer (30) and described supervisor (10) and described connecting tube (21) socket, described fibrous composite layer (30) comprises resin matrix and monfil.
2. concrete delivery pipe according to claim 1, is characterized in that, described monfil is one or more in glass fibre, superhigh molecular weight polyethylene fibers, carbon fiber, basalt fibre and aramid fibre.
3. concrete delivery pipe according to claim 1, is characterized in that, described resin matrix is formed by thermosetting resin cured.
4. concrete delivery pipe according to claim 3, is characterized in that, described thermosetting resin is epoxy resin.
5. the described concrete delivery pipe of any one according to claim 1 to 4, is characterized in that, is provided with the described monfil of multilayer in described fibrous composite layer (30).
6. the described concrete delivery pipe of any one according to claim 1 to 4, it is characterized in that, the outer surface of the internal surface of described fibrous composite layer (30) and described supervisor's (10) outer surface and described connecting tube (21) fits, and is formed with serrated-surface on described supervisor (10) and described connecting tube (21) and the contacted outer surface of described fibrous composite layer (30).
7. the described concrete delivery pipe of any one according to claim 1 to 4, is characterized in that, described supervisor's (10) inwall is formed with quench-hardened case, and the thickness of this quench-hardened case is 1/3rd to 1/2nd of described supervisor (10) wall thickness.
8. the described concrete delivery pipe of any one according to claim 1 to 4, is characterized in that, described flange (20) also comprises wear-resistant sleeve (23), and this wear-resistant sleeve (23) is arranged in the through hole of described flange (20), and dock with described supervisor (10).
9. the manufacture method of the described concrete delivery pipe of any one according to claim 1 to 8, is characterized in that, described manufacture method comprises the following steps:
Step 1, described flange (20) is socketed in described supervisor's (10) a end;
Step 2, described monfil is immersed in the resin that forms described resin matrix, to obtain the fiber prepreg material;
Step 3, described fiber prepreg material is wrapped on described connecting tube (21) and described supervisor (10) outer surface, solidifies and obtain described fibrous composite layer (30).
10. manufacture method according to claim 9, it is characterized in that, described step 3 comprises that the described connecting tube (21) to the described supervisor (10) who is wound with described fiber prepreg material and described flange (20) heats, make described resin solidification, to form described fibrous composite layer (30) on described connecting tube (21) and described supervisor's (10) outer surface.
11. manufacture method according to claim 9 is characterized in that, when being wound around described fiber prepreg material in described step 3, three layers of described fiber prepreg material of every winding are wound around the described monfil of one deck.
12. manufacture method according to claim 11 is characterized in that, the angle between the tangential and described supervisor's (10) of the bearing of trend of every described monfil length direction is that 10 degree are to 20 degree.
13. according to claim 9 to 12, the described manufacture method of any one, is characterized in that, also comprises vacuumizing step between described step 2 and described step 3, this vacuumizes step and comprises:
Step 1), the described supervisor (10) that will be wound with described fiber prepreg material and described flange (20) sealing are arranged in seal arrangement;
Step 2), described seal arrangement is vacuumized, make the air pressure in described seal arrangement reach 10 -3Pa to 10 -2Pa.
14. manufacture method according to claim 13, it is characterized in that, vacuumize step described, in described step 1) and described step 2) between also comprise the step that the described supervisor (10) who is wound with described fiber prepreg material in described sealing package and described flange (20) are carried out preheating, preheating temperature is 80 ℃ to 100 ℃, and holding time is 30min to 60min.
15. manufacture method according to claim 13 is characterized in that, described sealing package is rubber bag.
16. manufacture method according to claim 13, it is characterized in that, in described step 3, described supervisor (10) and the described connecting tube (21) that is wound with described fiber prepreg material is heated to 165 ℃ to 185 ℃, and be incubated 1 hour to 2 hours, so that described resin solidification.
17. the described manufacture method of any one according to claim 9 to 12, it is characterized in that, this manufacture method is included in the surface treatment step of carrying out before described step 2, and this surface treatment step comprises: forming described serrated-surface on the outer surface of described connecting tube (21) and on described supervisor's (10) outer surface.
18. according to claim 9 to 12, the described manufacture method of any one, is characterized in that, described step 1 comprises by spot welding described flange (20) is fixed on step on described supervisor (10).
19. the described manufacture method of any one according to claim 9 to 12, it is characterized in that, described manufacture method is carried out induction hardened step to described supervisor (10) before being included in described step 1, so that described supervisor's (10) inwall forms described quench-hardened case.
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Cited By (8)

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CN103343840A (en) * 2013-07-09 2013-10-09 中联重科股份有限公司 Composite tube and preparation method thereof
CN104295802A (en) * 2014-08-22 2015-01-21 中联重科股份有限公司 Concrete conveying pipe and machining method thereof
CN105626979A (en) * 2016-02-05 2016-06-01 中联重科股份有限公司 Conveying system, conveying pipe and manufacturing method of conveying pipe
CN105782603A (en) * 2016-04-05 2016-07-20 中国船舶重工集团公司第七〇二研究所 Composite material structural part with metal flanges and preparing method of composite material structural part
CN109552647A (en) * 2018-11-02 2019-04-02 中国航空工业集团公司西安飞机设计研究所 A kind of banjo fixing butt jointing of composite material class revolving body
CN112204210A (en) * 2018-01-31 2021-01-08 有限会社川端工业 Piping for transporting aqueous fluid and method for transporting aqueous fluid
CN112918021A (en) * 2021-03-03 2021-06-08 北京玻钢院复合材料有限公司 Composite material reinforced conveying pipe and preparation method thereof
CN113531226A (en) * 2021-06-21 2021-10-22 中联重科股份有限公司 Concrete conveying pipe, preparation method and concrete pump truck

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CN201053543Y (en) * 2007-06-29 2008-04-30 李茂国 Antistatic flame-retardant nano hybrid fiber composite material pipe
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103343840A (en) * 2013-07-09 2013-10-09 中联重科股份有限公司 Composite tube and preparation method thereof
CN103343840B (en) * 2013-07-09 2016-07-06 中联重科股份有限公司 Multiple tube and preparation method thereof
CN104295802A (en) * 2014-08-22 2015-01-21 中联重科股份有限公司 Concrete conveying pipe and machining method thereof
CN105626979A (en) * 2016-02-05 2016-06-01 中联重科股份有限公司 Conveying system, conveying pipe and manufacturing method of conveying pipe
CN105782603A (en) * 2016-04-05 2016-07-20 中国船舶重工集团公司第七〇二研究所 Composite material structural part with metal flanges and preparing method of composite material structural part
CN112204210A (en) * 2018-01-31 2021-01-08 有限会社川端工业 Piping for transporting aqueous fluid and method for transporting aqueous fluid
CN109552647A (en) * 2018-11-02 2019-04-02 中国航空工业集团公司西安飞机设计研究所 A kind of banjo fixing butt jointing of composite material class revolving body
CN112918021A (en) * 2021-03-03 2021-06-08 北京玻钢院复合材料有限公司 Composite material reinforced conveying pipe and preparation method thereof
CN113531226A (en) * 2021-06-21 2021-10-22 中联重科股份有限公司 Concrete conveying pipe, preparation method and concrete pump truck

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