CN106704718B - Composite pipeline, sweeping vehicle and manufacturing method of composite pipeline - Google Patents
Composite pipeline, sweeping vehicle and manufacturing method of composite pipeline Download PDFInfo
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- CN106704718B CN106704718B CN201510444402.5A CN201510444402A CN106704718B CN 106704718 B CN106704718 B CN 106704718B CN 201510444402 A CN201510444402 A CN 201510444402A CN 106704718 B CN106704718 B CN 106704718B
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Abstract
The invention discloses a composite pipeline, a sweeping machine and a manufacturing method of the composite pipeline. The composite conduit includes a tube base and a wear-resistant structure cast on the tube base, at least a portion of an inner surface of the composite conduit being formed by the wear-resistant structure. Based on the composite pipeline, the sweeping machine and the manufacturing method of the composite pipeline, provided by the invention, the composite pipeline is formed into the wear-resistant structure on the pipe substrate through casting, and the pipe substrate and the wear-resistant structure are tightly combined, so that the composite pipeline has better wear resistance and impact resistance. The road sweeper adopting the composite pipeline as the suction pipe has better wear resistance and shock resistance, thereby prolonging the service life of the suction pipe and further improving the working efficiency of the road sweeper.
Description
Technical Field
The invention relates to the field of material conveying equipment and cleaning equipment, in particular to a composite pipeline, a sweeping machine and a manufacturing method of the composite pipeline.
Background
When the sweeping machine is used for sweeping, the engine provides power for the fan, so that the fan rotates at a high speed to generate negative pressure on the dust chamber, and garbage is sucked into the dust chamber through the suction pipe, thereby completing vacuum suction and sweeping operation. During sucking and sweeping operation, the block-shaped objects moving at high speed have strong scouring action on the suction pipe, so that the service life of the suction pipe is short, the suction pipe is installed in the garbage box body, the disassembly and replacement are very difficult, and the working efficiency of the sweeping machine is seriously influenced.
In the prior art, in order to improve the wear resistance of the straw, the straw is generally manufactured by a physical compounding method.
Physical compounding processes use two or more materials that are physically bonded together by industrial adhesives to make a composite pipe. It is common to stick ceramic blocks on the inner wall of the tube base to prepare the suction tube.
In the process of implementing the invention, the inventor finds that the prior art has the following defects:
in the physical composite method, two materials are only physically bonded, the ceramic blocks are easy to fall off, the process requirement is strict, and each ceramic block in the whole straw must be firmly bonded so as to ensure that the whole straw has longer service life. Once a ceramic block falls, the block falling position is a weak link of the whole straw, and the weak link of the straw can be worn in a short time, so that the whole straw is invalid.
Disclosure of Invention
The invention aims to provide a composite pipeline which has good wear resistance and impact resistance.
The invention also aims to provide the sweeping machine, which is provided with the suction pipe with better wear resistance and shock resistance, so that the service life of the suction pipe can be prolonged, and the working efficiency of the sweeping machine is improved.
The invention also aims to provide a manufacturing method of the composite pipeline, and aims to manufacture the composite pipeline with better wear resistance and impact resistance.
A first aspect of the invention provides a composite pipe comprising a pipe substrate and a wear-resistant structure cast onto the pipe substrate, at least a portion of an inner surface of the composite pipe being formed by the wear-resistant structure.
Further, the wear-resistant structure is formed by casting a casting liquid formed by mixing liquid metal and wear-resistant reinforcing particles on the pipe base body.
Further, the wear resistant structure is formed on the tube base by centrifugal casting.
Further, the density of the wear-resistant reinforcing particles is less than the density of the liquid metal.
Further, the wear-resistant reinforcing particles are ceramic particles.
Further, the ceramic particles are TiC ceramic particles.
Further, the wear-resistant structure comprises a wear-resistant pipe layer formed on the inner wall of the pipe substrate, and the inner surface of the wear-resistant pipe layer is the inner surface of the composite pipeline.
Furthermore, the tube base body comprises a plurality of first accommodating parts opened on one side of the inner wall of the tube base body, and the wear-resistant structure further comprises a plurality of connecting pins formed in the first accommodating parts and integrally cast with the wear-resistant tube layer.
Further, the pipe base body includes a plurality of second receiving portions opened to one side of the inner wall of the pipe base body, and the wear-resistant structure includes a plurality of wear-resistant blocks cast into the second receiving portions, and inner end surfaces of the wear-resistant blocks facing radially inward of the pipe base body form at least a part of the inner surface of the composite duct.
Further, the total area of the inner end surfaces of the plurality of wear blocks occupies more than 50% of the area of the inner surface of the composite pipe.
Further, after the wear-resistant structure is formed on the pipe base body, surface heat treatment is also performed on the composite pipe.
In a second aspect, the invention provides a road sweeper, comprising a suction pipe, wherein the suction pipe is a composite pipeline according to any one of the first aspect of the invention.
A third aspect of the present invention provides a method of manufacturing a composite pipe, comprising: manufacturing a tube substrate; forming a wear-resistant structure on the tube substrate, the wear-resistant structure being cast on the tube substrate and having at least a portion of an inner surface of the composite conduit formed by the wear-resistant structure.
Further, the wear-resistant structure is formed by casting a casting liquid formed by mixing liquid metal and wear-resistant reinforcing particles on the pipe base body.
Further, the wear resistant structure is centrifugally cast on the tube base.
Further, the density of the wear-resistant reinforcing particles is less than the density of the liquid metal.
Further, the step of forming the wear-resistant structure on the pipe substrate comprises the step of casting a wear-resistant pipe layer on the inner wall of the pipe substrate, and enabling the inner surface of the wear-resistant pipe layer to be the inner surface of the composite pipeline.
Further, the step of manufacturing a tube base body includes manufacturing a first accommodating portion, which is opened to an inner wall of the tube base body, on the tube base body; the step of forming a wear-resistant structure on the tube substrate further includes forming a connection foot in the first receptacle integrally cast with the wear-resistant tube layer.
Further, the step of manufacturing a tube base body includes forming a plurality of second receiving portions opened to an inner wall of the tube base body on the tube base body; the step of forming a wear-resistant structure on the tube base includes casting a plurality of wear-resistant blocks in the second receiving portions, and forming inner end surfaces of the wear-resistant blocks facing radially inward of the tube base into at least a part of an inner surface of the composite duct.
Further, after forming the wear resistant structure on the pipe substrate, the manufacturing method further includes subjecting the composite pipe to a surface heat treatment.
Based on the composite pipeline, the sweeping machine and the manufacturing method of the composite pipeline, provided by the invention, the composite pipeline is formed into the wear-resistant structure on the pipe substrate through casting, and the pipe substrate and the wear-resistant structure are tightly combined, so that the composite pipeline has better wear resistance and impact resistance. The road sweeper adopting the composite pipeline as the suction pipe has better wear resistance and shock resistance, thereby prolonging the service life of the suction pipe and further improving the working efficiency of the road sweeper.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural view of a composite pipe according to a first embodiment of the present invention.
Fig. 2 is a schematic structural view of a composite pipe according to a second embodiment of the present invention.
Fig. 3 is a schematic structural view of a composite pipe according to a third embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 to 3, the present invention provides a composite conduit including a pipe base and a wear-resistant structure provided on the pipe base, the wear-resistant structure being cast on the pipe base, at least a portion of an inner surface of the composite conduit being formed of the wear-resistant structure. Because the composite pipeline adopts the wear-resistant structure formed on the pipe matrix by casting, the combination between the pipe matrix and the wear-resistant structure is very tight, and the composite pipeline has better wear resistance and shock resistance.
Preferably, the wear resistant structure is cast from a casting liquid formed by mixing a liquid metal and wear resistant reinforcing particles onto the tube substrate. The wear-resistant structure formed in this way has better wear resistance besides being tightly combined with the pipe base body. More preferably, the wear resistant structure is centrifugally cast on the tube substrate. The wear-resistant structure is formed by centrifugally casting the liquid metal mixed with the wear-resistant reinforced particles, so that the structure of the wear-resistant structure can be refined, the number of microscopic defects is small, the density is high, the strength, hardness and plasticity of the composite pipeline can be improved, and the purpose of combining the pipe matrix and the wear-resistant structure in a tough manner is achieved.
Preferably, the density of the wear-resistant reinforcing particles is less than the density of the liquid metal. This arrangement allows more wear-resistant reinforcing particles to be distributed over the inner surface of the wear-resistant structure, so that the local wear resistance of the inner surface of the wear-resistant structure is higher than in other parts of the wear-resistant structure. And the added wear-resistant reinforced particles can be more uniformly distributed on the working surface of the composite pipeline, so that the using amount of the wear-resistant reinforced particles is saved, and the production cost of the composite pipeline is reduced.
The wear-resistant structure can be a wear-resistant pipe layer arranged on the inner wall of the pipe substrate, and the inner surface of the wear-resistant pipe layer is the inner surface of the composite pipeline. The composite pipeline has the advantages of good wear resistance and impact resistance, simple structure and convenient manufacture.
In addition, the wear-resistant structure of the composite pipeline can also comprise a wear-resistant pipe layer and a connecting foot which are integrally cast. The wear-resistant pipe layer is arranged on the inner wall of the pipe base body, and the inner surface of the wear-resistant pipe layer is the inner surface of the composite pipeline; the connecting pin is deeply positioned on the tube base body and is opened in the first accommodating part at the inner side of the tube base body so as to be connected with the tube base body. The arrangement of the connecting feet enables the connection between the wear-resistant tube layer and the tube substrate to be tight, and the tube substrate is suitable for being used under the condition of higher impact degree.
In addition, the wear-resistant structure may further include a plurality of wear-resistant blocks. Wear blocks are formed in the plurality of second accommodation portions on the tube base, and inner end surfaces of the wear blocks facing radially inward of the tube base form at least a part of an inner surface of the composite duct. Preferably, the total area of the inner end faces of the wear blocks accounts for more than 50% of the area of the inner surface of the composite tube. Wherein, a plurality of wear-resisting piece plays the effect of reinforcing the wearability of compound pipeline. The wear-resistant structure in the form of the wear-resistant block enables the bonding force between the wear-resistant structure and the pipe base body to be stronger, and the layering phenomenon cannot be generated, so that the wear-resistant structure is more suitable for being used under the working condition of strong impact and strong wear.
The wear-resistant reinforcing particles are preferably ceramic particles, for example, the wear-resistant reinforcing particles may be TiC ceramic particles. The particle size of the wear-resistant reinforced particles is generally 100-200 meshes. The volume proportion of the wear-resistant reinforced particles in the casting liquid is generally 10-50%.
Embodiments of the present invention will be further described with reference to fig. 1 to 3.
First embodiment
Fig. 1 is a composite pipe according to a first embodiment of the present invention.
As shown in fig. 1, the composite conduit 100 of the first embodiment includes a tube base 110 and a wear resistant structure 120. In this embodiment, the wear-resistant structure 120 is a wear-resistant tube layer.
The composite pipeline 100 is formed by directly pouring a pouring liquid formed by mixing TiC ceramic particles and liquid metal on the inner wall of the pipe substrate 110 through centrifugal casting, so that a wear-resistant pipe layer with TiC ceramic particles is directly formed on the inner wall of the pipe substrate 110, and the inner surface of the wear-resistant pipe layer is the inner surface of the composite pipeline 100.
In the first embodiment, the grain size of the TiC ceramic particles may be 100 to 200 mesh. The volume proportion of the TiC ceramic particles in the casting liquid can be 10-50%. The liquid metal may be, for example, a liquid metal of an iron-based metal material.
The TiC ceramic particles are high-hardness wear-resistant reinforced particles and have the density of about 4.93g/cm3And has a density lower than that of the liquid metal of the iron-based metal material. The density difference of the liquid metal and the wear-resistant reinforced particles can be utilized by adopting a centrifugal casting mode, the wear-resistant reinforced particles and the liquid metal are subjected to relative displacement under the action of centrifugal force, and the TiC ceramic particles with the density smaller than that of the liquid metal are more distributed on the inner side of the composite pipeline 100, so that the inner side of the wear-resistant pipe layer has better wear resistance than the outer side, and the wear resistance of the composite pipe body 100 is improved.
In addition, since the pipe substrate 110 and the wear-resistant pipe layer are metallurgically bonded and the bonding force between the two is stronger than that of a composite pipe in which two materials are bonded together by an industrial bonding agent, the bonding between the pipe substrate 110 and the wear-resistant pipe layer is tight, thereby improving the impact resistance of the composite pipe body 100.
To further increase the surface hardness and the service life of the composite pipe body 100, the composite pipe body 100 after the wear-resistant structure 120 is formed on the pipe base 110 may be subjected to surface heat treatment.
The composite pipe body 100 of the first embodiment is suitable for working conditions with certain impact and strong abrasion.
Second embodiment
Fig. 2 is a composite pipe according to a second embodiment of the present invention.
As shown in fig. 2, the composite conduit 200 of the second embodiment includes a pipe matrix 210 and a wear resistant structure 220. In this embodiment, the wear-resistant structure 220 includes a wear-resistant tube layer 221 and a connection pin 222.
A plurality of first receiving portions are provided on an inner wall of the tube base 210. The present invention does not limit the shape or structure of the first receiving portion. For example, the first receiving parts may be a plurality of first recesses, a plurality of first through holes, or both a plurality of first recesses and a plurality of first through holes. A series of first circular holes having a depth less than the thickness of the tube base 210 are machined on the inner surface of the tube base 210 as first receptacles in this embodiment.
When the wear-resistant structure 220 is formed on the tube substrate 210, casting liquid formed by mixing TiC ceramic particles and liquid metal is directly cast on the inner wall of the tube substrate 210 through centrifugal casting, on one hand, the casting liquid flows into the plurality of first circular holes, and a connecting pin 222 is formed in each first circular hole, on the other hand, a wear-resistant tube layer 221 with TiC ceramic particles is formed on the inner wall of the tube substrate 210, and the inner surface of the wear-resistant tube layer 221 is the inner surface of the composite pipeline 200.
In the second embodiment, the grain size of the TiC ceramic particles may be 100-200 mesh. The volume proportion of the TiC ceramic particles in the casting liquid can be 10-50%. The liquid metal may be, for example, an iron-based metal material.
In the second embodiment, the density difference between the liquid metal and the wear-resistant particles is also utilized, the wear-resistant particles and the liquid metal are relatively displaced under the action of centrifugal force, and the TiC ceramic particles with the density smaller than that of the liquid metal are distributed on the inner side of the composite pipeline 200, so that the inner side of the wear-resistant pipe layer 221 has better wear resistance than the outer side, and the wear resistance of the composite pipe body 200 is improved.
In addition, on one hand, the tube substrate 210 and the wear-resistant tube layer 120 are metallurgically bonded, and the bonding force between the two is stronger than that of a composite tube in which the two materials are bonded together by an industrial bonding agent, and thus, the bond between the tube substrate 210 and the wear-resistant tube layer 120 is tight. On the other hand, in the present embodiment, a series of columnar protrusions as connecting legs 222 are generated on the outer side of the wear-resistant tube layer 221, and the columnar protrusions penetrate into the tube base 210, so that the bonding strength between the tube base 210 and the wear-resistant tube layer 221 is effectively enhanced, and the impact resistance of the composite tube body 200 is further improved compared with the first embodiment.
In order to further increase the surface hardness and the service life of the composite pipe body 200, the composite pipe body 200 after the wear-resistant structure 220 is formed on the pipe base 210 may be subjected to surface heat treatment.
The composite pipe body 200 of the second embodiment is suitable for the working condition of strong impact and strong abrasion.
Other parts of the second embodiment not described may refer to relevant parts of the first embodiment.
Third embodiment
Fig. 3 is a composite conduit according to a third embodiment of the present invention.
As shown in fig. 3, the composite conduit 300 of the third embodiment includes a conduit base 310 and a wear-resistant structure 320. In this embodiment, the wear resistant structure 320 includes a plurality of wear resistant blocks disposed within the tube base 310.
As shown in fig. 3, a plurality of second receiving portions are provided on the inner wall of the tube base 310. The present invention does not limit the shape or structure of the second receiving portion. For example, the plurality of second receiving portions may be a plurality of second recesses, a plurality of second through holes, or both a plurality of second recesses and a plurality of second through holes. A series of second circular holes having a depth less than the thickness of the tube base 310 are machined on the inner surface of the tube base 310 as second receptacles in this embodiment.
When the wear-resistant structure 320 is formed on the tube base 310, casting liquid formed by mixing TiC ceramic particles and liquid metal is directly poured on the inner wall of the tube base 310 through centrifugal casting, and the quantity of the casting liquid just fills the plurality of second accommodating parts, so that a wear-resistant block is formed in each second accommodating part. The inner end surface of each wear block is flush with the inner surface of the unfilled wear blocks of the tube base 310 forming the inner surface of the composite tube.
In the third embodiment, the grain size of the TiC ceramic particles may be 100-200 mesh. The volume proportion of the TiC ceramic particles in the casting liquid can be 10-50%. The liquid metal may be, for example, an iron-based metal material.
In the third embodiment, the thickness of the pipe base body 310 of the composite pipe 300 is preferably greater than those of the first and second embodiments, and when the composite pipe 300 is used as a suction pipe of a sweeping machine, the thickness of the composite pipe 300 is preferably 8 to 12 mm.
Preferably, the diameter range of the second round hole is 5-10 mm, and the total area of the inner end faces of the wear-resisting blocks accounts for 60-70% of the area of the inner surface of the composite pipeline.
Through reasonable design of the plurality of second accommodating parts, the total area of the inner end surfaces of the wear-resistant blocks can occupy 100% of the area of the inner surface of the composite pipeline under the limit condition.
When the composite pipeline 300 is manufactured, the pouring amount of the pouring liquid is controlled, so that the second circular holes are just filled with the pouring liquid, a plurality of wear-resistant cylinders serving as wear-resistant blocks are formed in the second circular holes of the pipe base body 310, the binding force between the wear-resistant cylinders and the pipe base body 310 is strong, the wear-resistant cylinders play a role in wear resistance, and the pipe base body plays a role in impact resistance.
In the third embodiment, the density difference between the liquid metal and the wear-resistant reinforced particles is also utilized, the wear-resistant reinforced particles and the liquid metal are relatively displaced under the action of centrifugal force, and the TiC ceramic particles with the density smaller than that of the liquid metal are distributed on the inner side of the composite pipeline 300, so that the inner end surface of the wear-resistant block has better wear resistance than the outer end surface of the wear-resistant block, and the wear resistance of the composite pipeline 300 is improved.
In addition, since the tube base 310 and each wear-resistant block are metallurgically bonded, the bonding force between the two is stronger than that of a composite pipe in which the two materials are bonded together by an industrial bonding agent, and thus, the bonding between the tube base 310 and the wear-resistant blocks is tight. And the wear-resistant block is positioned in the second accommodating portion of the tube base 310, the bonding area is large, and the bonding force is relatively large, so that the impact resistance can be better compared with the first and second embodiments.
When the composite pipe 300 is used for conveying materials, the materials are in direct contact with the pipe base 310, but the composite pipe is different from the composite pipe in the prior art in which ceramic blocks are adhered inside the pipe base when the ceramic blocks fall off. In the composite pipeline in the prior art, because the ceramic block can form a pit in the composite pipeline when falling off, the flowing of internal fluid is greatly changed at the pit, the abrasion of a pipe matrix is easy to occur at the pit, and the pit becomes the weakest link of the composite pipeline. The composite pipe 300 of the third embodiment has no pits, and the flow of the internal fluid does not change greatly and is always in a stable flowing state, so that the pipe base part between the wear-resistant blocks is not subjected to the flushing of the fluid, but the weakest link does not appear like the composite pipe in the prior art. In addition, in the composite pipe 300 of the third embodiment, the distance between the wear-resistant blocks is preferably set to be smaller than the size of the particles carried in the material to be conveyed, so that the particles do not rub against the pipe matrix between the wear-resistant blocks alone, when the particles move in the composite pipe, a certain part of the particles must contact with the wear-resistant blocks, so that the wear-resistant blocks can better exert the wear-resistant effect, and the pipe matrix between the wear-resistant blocks can better exert the impact-resistant effect.
To further increase the surface hardness and service life of the composite pipe body 300, the composite pipe body 300 after forming the wear resistant structure 320 on the pipe base 310 may also be heat treated.
Delamination of the wear-resistant tube layers of both the first and second embodiments is possible under very strong impacts, while the wear-resistant construction in the form of the wear-resistant blocks of the third embodiment is effectively protected against delamination. The composite pipe body 300 of the third embodiment is suitable for the working condition of strong impact and strong abrasion.
Other parts of the third embodiment not described may refer to the relevant contents of the first and second embodiments.
The invention also provides a sweeping machine which adopts the composite pipeline as a suction pipe. The suction pipe of the sweeping machine has good wear resistance and shock resistance, so that the service life of the suction pipe can be prolonged, and the working efficiency of the sweeping machine is improved.
Of course, the composite conduit of the present invention is not limited to use in a sweeping vehicle, but may be used in a variety of material conveying lines or devices that are susceptible to wear.
In addition, the invention also provides a manufacturing method of the composite pipeline. The manufacturing method comprises the following steps: manufacturing a tube substrate; and forming a wear-resistant structure on the pipe base body, wherein the wear-resistant structure is formed on the pipe base body in a casting mode, and at least one part of the inner surface of the composite pipeline is formed by the wear-resistant structure. Preferably, the wear resistant structure is formed on the tube substrate by centrifugal casting of a casting liquid in which a liquid metal and wear resistant reinforcing particles are mixed. More preferably, the density of the wear-resistant reinforcing particles is less than the density of the liquid metal.
Further preferably, the step of forming the wear resistant structure on the tube substrate comprises forming a wear resistant tube layer on the inner wall of the tube substrate and making the inner surface of the wear resistant tube layer the inner surface of the composite tube. More preferably, the step of manufacturing the tube base body includes manufacturing a first accommodating portion opened to an inner wall of the tube base body on the tube base body; the step of forming the wear-resistant structure on the tube base body comprises forming a connection foot in the first receptacle, which is cast integrally with the wear-resistant tube layer.
Further preferably, the step of manufacturing the tube base body includes forming a second accommodating portion opened to an inner wall of the tube base body on the tube base body; the step of forming the wear-resistant structure on the tube base includes forming a wear-resistant block in the second accommodation portion by centrifugal casting, and forming at least a part of an inner surface of the composite duct with an inner end surface of the wear-resistant block facing radially inward of the tube base.
Preferably, after the wear resistant structure is formed on the tube substrate, the composite conduit may also be subjected to a surface heat treatment to increase the surface hardness of the composite conduit.
The advantages of the above manufacturing method can be referred to the corresponding contents of the composite pipe, and further details such as the material, particle size, etc. of the wear-resistant reinforcing particles mentioned in the description of the composite pipe are equally applicable to the manufacturing method of the present invention, and will not be described repeatedly here.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (12)
1. A composite conduit comprising a pipe base and a wear structure cast onto said pipe base, at least a portion of an inner surface of said composite conduit being formed by said wear structure, said wear structure being cast from a casting fluid comprising a mixture of liquid metal and wear-resistant reinforcing particles onto said pipe base, said pipe base including a plurality of second receptacles opening to one side of an inner wall of said pipe base, said wear structure comprising a plurality of wear blocks cast into said second receptacles, inner end surfaces of said wear blocks being flush with inner surfaces of said pipe base not filled with said wear blocks, inner end surfaces of said wear blocks facing radially inward of said pipe base forming at least a portion of said inner surface of said composite conduit.
2. The composite pipe of claim 1 wherein the wear resistant structure is formed on the pipe substrate by centrifugal casting.
3. The composite pipe of claim 1 wherein the wear-resistant reinforcing particles have a density less than the density of the liquid metal.
4. The composite pipe of claim 1 wherein the wear-resistant reinforcing particles are ceramic particles.
5. The composite pipe of claim 4 wherein said ceramic particles are TiC ceramic particles.
6. The composite tube of claim 1, wherein the total area of the inner end surfaces of the plurality of wear resistant blocks comprises more than 50% of the area of the inner surface of the composite tube.
7. The composite pipe of any of claims 1 to 5 wherein the composite pipe is further subjected to a surface heat treatment after the wear resistant structure is formed on the pipe substrate.
8. A sweeping vehicle comprising a suction pipe, wherein the suction pipe is a composite conduit according to any one of claims 1 to 7.
9. A method of manufacturing a composite pipe, comprising:
manufacturing a tube substrate;
forming a wear-resistant structure on the pipe base body by casting, wherein the wear-resistant structure is formed on the pipe base body by casting, and at least a part of the inner surface of the composite pipe is formed by the wear-resistant structure, the wear-resistant structure is formed on the pipe base body by casting a casting liquid in which a liquid metal and wear-resistant reinforcing particles are mixed, and the step of manufacturing the pipe base body includes forming a plurality of second accommodating portions which are opened on the inner wall of the pipe base body on the pipe base body; the step of forming a wear-resistant structure on the tube base includes casting a plurality of wear-resistant blocks in the second plurality of receiving portions with inner end surfaces of the wear-resistant blocks flush with an inner surface of the tube base not filled with the wear-resistant blocks, the inner end surfaces of the plurality of wear-resistant blocks facing radially inward of the tube base forming at least a portion of the inner surface of the composite tube.
10. The method of manufacturing of claim 9, wherein the wear resistant structure is centrifugally cast on the tube base.
11. A method of manufacturing according to claim 9, wherein the wear resistant reinforcing particles have a density less than the density of the liquid metal.
12. The method of manufacturing of any of claims 9-11, further comprising subjecting the composite conduit to a surface heat treatment after forming the wear resistant structure on the tube substrate.
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| CN201510444402.5A CN106704718B (en) | 2015-07-24 | 2015-07-24 | Composite pipeline, sweeping vehicle and manufacturing method of composite pipeline |
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| CN107387890A (en) * | 2017-08-09 | 2017-11-24 | 镇江春环密封件集团有限公司 | A kind of steel lining polyfluortetraethylecomposite composite pipe |
| IT201800003964A1 (en) * | 2018-03-26 | 2019-09-26 | Valme S R L Unico Socio | TUBULAR ELEMENT FOR THE TRANSFER OF ABRASIVE MATERIALS, IN PARTICULAR CONCRETE, AND PROCEDURE FOR REALIZING IT |
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| CN2856666Y (en) * | 2004-12-20 | 2007-01-10 | 鲍崇高 | Bimetal composite delivery pipeline made of vacuum negative pressure cast special alloy |
| CN101592265A (en) * | 2009-07-03 | 2009-12-02 | 郑州神牛铸造有限公司 | Bimetal wear resistant composite tube |
| ES2950985T3 (en) * | 2010-02-05 | 2023-10-17 | Weir Minerals Australia Ltd | Hard metal materials |
| CN103206589B (en) * | 2013-03-23 | 2016-06-29 | 广州有色金属研究院 | A kind of manufacture method of composite special-shaped pipeline |
| CN104646644A (en) * | 2013-11-22 | 2015-05-27 | 焦作市宝来煤焦机械有限公司 | Double-liquid bi-metal composite pipe |
| CN104044274B (en) * | 2014-05-16 | 2017-01-04 | 连云港中复连众复合材料集团有限公司 | A kind of preparation method of the wear-and corrosion-resistant composite delivery pipeline of high bond strength |
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