WO2016141879A1 - 一种两分或多分双层式耐磨抗冲击管及其制备方法 - Google Patents
一种两分或多分双层式耐磨抗冲击管及其制备方法 Download PDFInfo
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- WO2016141879A1 WO2016141879A1 PCT/CN2016/076021 CN2016076021W WO2016141879A1 WO 2016141879 A1 WO2016141879 A1 WO 2016141879A1 CN 2016076021 W CN2016076021 W CN 2016076021W WO 2016141879 A1 WO2016141879 A1 WO 2016141879A1
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- Prior art keywords
- wear
- resistant
- tube
- layer
- impact
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
- F16L43/001—Bends; Siphons made of metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/22—Pipes composed of a plurality of segments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
- B65G2207/48—Wear protection or indication features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/32—Conveying concrete, e.g. for distributing same at building sites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/52—Adaptations of pipes or tubes
- B65G53/523—Wear protection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
- F16L43/001—Bends; Siphons made of metal
- F16L43/002—Bends; Siphons made of metal and formed from sheet having a circular passage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
- F16L43/02—Bends; Siphons adapted to make use of special securing means
Definitions
- the invention relates to a conveying pipe structure applied in the fields of construction, mining, metallurgy, electric power, petroleum, coal, grain processing and the like, in particular to a two- or multi-divided double-layer wear-resistant anti-impact tube and a preparation method thereof.
- Pipe forming technology mainly includes casting molding, compression molding, etc., which are all formed by casting or hot-cold pressing process by molding die; no matter which kind of machinery and equipment, most of them use pipes.
- the material is transported through the pipeline pressure, the pipeline is subject to greater pressure and severe wear, so the pipeline, especially the connecting pipeline has a higher comprehensive performance requirements; improve the use of pipelines Lifespan has become a difficult problem to overcome.
- the most widely used pipelines are single-layer high-manganese steel pipelines, and there are also a few cases where double-layer high-chromium cast iron pipelines are used; single-layer high-manganese steel pipelines have poor wear resistance, low hardness and low safety; double-layer wear-resistant pipeline costs High, good quality, excellent wear resistance, high hardness, high safety, but not cost-effective.
- a wear-resistant elbow is disclosed in the Chinese patent CN203023710U; the wear-resistant elbow comprises a body, and further comprises a polymer elastomer layer disposed in the body, the thickness of the polymer elastomer layer being in the bend
- the thickness of the middle section of the tube is 3-15 mm, and the thickness at the end of the elbow is 2-10 mm; however, the wear-resistant elbow has an increase in cost, between the body and the polymeric elastomer layer It is easy to wear, and the polymer layer is easily peeled off under the scouring of the fluid.
- a method of manufacturing a curved tubular member and a curved tubular member obtained thereby, comprising obtaining a first outer curved tubular member and a second inner curved member, the second inner curved member being bent by having a first outer portion is disclosed in Chinese Patent No.
- the tubular member is made of a material that is more wear resistant and has a cross section to cover At least a portion of the inner surface of the first outer curved tubular member; the method provides for manufacturing the first outer curved tubular member as at least two members, wherein each member has a cross section that is complete of the first outer curved tubular member Corresponding portions of the tubular section; bringing at least two components into close proximity to each other along respective connecting edges, disposing the second inner curved component inside and contacting at least one of the two components; welding at least two components to form the first outer portion The tubular member is bent and the second inner curved member is enclosed within the first outer curved tubular member.
- the second inner curved part of the curved pipe member adopts a half pipe design
- the first outer curved tubular part and the second inner curved part have a great problem in the degree of installation tightness, and the second inner curved part appears as an extension part.
- the object of the present invention is to overcome the shortcomings of the prior art and to provide a two-layer double-layer wear-resistant and impact-resistant pipe with low manufacturing cost and high service life.
- the present invention provides a two- or multi-division double-layer wear-resistant anti-impact tube, the wear-resistant anti-impact tube comprising: an outer protective tube and an inner wear-resistant composite tube, wherein The inner wear-resistant composite tube is nested in the outer protective tube, and the inner wear-resistant composite tube is composed of two or more tube walls, and the two or more tube walls are spliced together to form A tubular body having a circular cross section.
- the materials of the two tube walls are different from each other; if the inner wear-resistant composite tube is composed of a plurality of tube walls, Then, at least two of the plurality of tube walls are made of different materials.
- the thickness of at least two of the tube walls in the inner wear-resistant composite tube is different from each other.
- a filling channel of a predetermined width is disposed between adjacent tube walls.
- the filling channel is a gap reserved between adjacent tube walls, and the filling channel has a width of 0.5-2 mm.
- the filling channel has a width of 1 mm.
- the wear-resistant impact tube further includes a wear-resistant connecting flange, the wear-resistant connecting flange is composed of a flange and a wear-resistant sleeve; the wear-resistant sleeve is installed inside the flange, two The wear-resistant connecting flanges are respectively welded on both ends of the outer protective tube and the inner wear-resistant composite tube.
- the wear sleeve is provided with a wear sleeve matching slope; the wear sleeve fit slope is disposed on the outer edge of the wear sleeve.
- the wear-resistant anti-impact tube is a wear-resistant elbow
- the inner wear-resistant composite tube of the wear-resistant elbow is composed of an inner wear-resistant large bend and an inner wear-resistant small bend.
- the inner layer wear-resistant large bend and the inner layer wear-resistant small bend are composed of materials with different wear resistance.
- the outer protective tube includes a large curved outer protective portion and a small curved outer protective portion, and the material used for the outer protective tube and the inner layer wear-resistant composite tube The materials are different from each other, and the large curved outer protection portion is located outside the inner layer wear-resistant large curved portion, and the small curved outer protective portion is located outside the inner layer wear-resistant small curved portion, the large curved outer protective portion and the small curved portion
- the outer protective portion is welded together along the side portion to form a tubular body having a ring-shaped cross section, and the large outer curved protective portion and the small outer curved protective portion are connected by welding at the edge of the trailing edge together.
- the large curved outer protective portion and the small curved outer protective portion are made of low alloy steel or medium and low carbon steel material.
- the wear resistance of the inner layer wear-resistant large bend is better than that of the inner layer wear-resistant small bend wear-resistant material.
- the inner wall of the inner wear-resistant composite pipe is made of high chromium cast iron, medium chromium cast iron, low chromium cast iron, wear resistant cast iron, ceramic, cemented carbide, bearing steel, alloy steel, and Made of one of the polymer materials.
- the inner layer wear-resistant large bend is designed to be thicker from the both ends A to the middle B and thicker from the both sides C to the middle D.
- a buffer cavity is further disposed between the large curved outer protective portion and the inner layer wear-resistant large bend and between the small curved outer protective portion and the inner layer wear-resistant small curved portion.
- the wear resistant impact tube is a wear resistant straight tube.
- the inner wear-resistant composite tube of the wear-resistant straight tube has a different thickness in the circumferential direction of its cross-section.
- the wear resistance of the material used in the wall of the inner layer of the inner wear-resistant composite pipe is superior to that of the materials used for the side walls of the side and the top.
- the wear resistant impact tube is a shaped tube.
- the inner wear-resistant composite tube of the shaped tube is made of different wear-resistant materials according to different wear strength of each part.
- the present invention provides a method for preparing a two- or multi-divided double-layer wear-resistant impact tube, characterized in that the method comprises:
- (A) preparing an inner layer wear-resistant composite tube, the preparation process comprises:
- At least two of the tube walls in the inner wear-resistant composite tube are made of a wear resistant material of a different material.
- a filling passage of a predetermined width is disposed between adjacent tube walls.
- the filling channels are gaps reserved between adjacent tube walls.
- the filling channel has a width of 0.5-2 mm.
- the filling channel has a width of 1 mm.
- the wear-resistant impact tube is a wear-resistant elbow
- the inner wear-resistant composite tube comprises an inner wear-resistant large bend and an inner wear-resistant small bend
- the inner layer is wear-resistant.
- the wear resistance of the wear-resistant material used in the big bend is better than the wear resistance of the wear-resistant material used in the inner wear-resistant small bend.
- the inner layer wear-resistant large bend is designed to be thicker from the both ends A to the middle B and thicker from the both sides C to the middle D.
- the wear-resistant impact tube is a wear-resistant straight tube
- the inner wear-resistant composite tube of the wear-resistant straight tube has different thicknesses in the circumferential direction of its cross section.
- one of the two or more tube walls is made of one of wear-resistant cast iron, ceramic, and cemented carbide, and the other is made of one of alloy steel and polymer material. production.
- the wear-resistant impact tube is a special-shaped tube
- the inner wear-resistant combination tube of the shaped tube is made of different wear-resistant materials according to different wear strengths of the respective parts.
- the method further includes preparing a wear-resistant connecting flange, the wear-resistant connecting flange is composed of a flange and a wear-resistant sleeve; the wear-resistant sleeve is installed inside the flange, and the wear-resistant sleeve is The wear sleeve is provided with a matching slope; the wear sleeve is matched with the inclined surface on the outer circumference of the wear sleeve.
- the method further includes disposing a buffer cavity between the outer protective tube and the inner wear-resistant composite tube.
- the wear-resistant composite pipe of the invention for protecting the inner layer is not subjected to external force collision, impact deformation, damage during pipeline transportation, installation and use, and deformation or even damage caused by internal fluid impact force, and the outer protection pipeline is provided.
- the outer protective pipe consists of two or more parts, each of which has a circular arc of any degree, but the multiple sections must be combined to form a 360-degree circle (the circle here is not necessarily positive) Round, can be elliptical or other forms of deformation).
- the invention divides the wear layer into two or more parts, and each part adopts different wear-resistant materials. Since the wear of the different parts of the pipe is different when the pipe is conveyed, the degree of wear is different, so There are also different factors to consider when strengthening different parts. Therefore, the present invention makes different parts of the pipe made of different materials, and can select different materials for the characteristics of the parts to enhance the wear resistance. For example, for a bent pipe, the large curved portion is reinforced, and for the straight pipe, the lower portion of the pipe is reinforced.
- the present invention considers that the impact force and wear of the large bend are the most serious, and the wear resistance of the wear material used in the large bend is better than that of the small bend material.
- the large bend is designed to be thicker from the two ends A to the middle B and thicker from the two sides C to the middle D, ensuring the high wear resistance of the most wearable position in the middle of the big bend; wherein the small bend is designed to wait Thick and unequal thickness can be guaranteed to ensure that the small bend has the corresponding wear resistance.
- the present invention contemplates that the wear and impact received at the bottom are greater, and the wear resistance of the wear resistant material employed at the bottom is superior to the wear resistance of other portions of the materials used.
- the different parts of the inner heterogeneous wear-resistant composite pipe are made of high-chromium cast iron, medium-chromium cast iron, low-chromium cast iron, wear-resistant cast iron, ceramic, hard alloy, bearing steel, alloy steel, polymer material and other wear-resistant materials. Made of two or more materials with different wear resistance.
- the advantage of using such a wear-resistant combination pipe is that a material with high wear resistance and impact resistance can be used for the part where the pipe is susceptible to wear and impact, and the same material is not required for the place with small impact force, thereby saving manufacturing.
- the raw material cost guarantees wear and impact resistance.
- the invention has a wear-resistant sleeve; and a wear-resistant sleeve fits the inclined surface thereon; the wear-resistant sleeve fits the inclined surface to be resistant to Grinding sleeve on the outer circle.
- the two-point or multi-layer double-layer wear-resistant pipe of the invention can be used in various harsh environments in the construction, mining, metallurgy, electric power, petroleum, coal, grain processing and other industries.
- Material transport designed as a unique structure of two or more double layers, divided into a protective layer and a wear layer, the wear layer is divided into two or more parts.
- the thickness of the wall of the wear-resistant layer designed by the invention is unevenly distributed (from the both ends A to the middle B and the two sides C to the middle D becomes thicker), and the wall portion of the middle portion which is severely worn and easily worn is thick.
- the designed wear-resistant connecting flange facilitates the connection of the pipeline to other equipment, and the wear-resistant sleeve inside the wear-resistant connecting flange ensures the wear resistance of the mouth end and prolongs the wear-resistant connecting flange.
- the inner wear layer can be formed by high chromium cast iron, medium chromium cast iron, low chromium cast iron, ceramic, hard alloy, bearing steel, alloy steel, polymer material and wear-resistant electrode.
- the wear-resistant material such as wear-resistant layer can improve the wear resistance of the pipeline by several times or more; the outer protective layer is made of low-alloy steel or medium-low carbon steel; this design can reduce the overall weight of the pipeline by at least 10%, and achieve the reduction. Cost, material saving, resource saving purpose; high service life, low price, cost-effective several times or more; easy to achieve mass production, stable and reliable quality, no abnormal phenomena such as breakage, pipe burst, etc. High performance.
- the invention leaves a certain filling passage between two or more portions of the inner layer combined pipeline, so that the conveyed medium can penetrate between the outer layer tube and the inner layer tube through the filling passage to enhance wear resistance,
- the inner tube can be provided with a buffer space without being broken by a sudden impact, and the problem that the inner wall is excessively hard and the crack is caused by the impact wear is reduced.
- a fill channel is provided between the various portions of the inner layer combined conduit, and different wear resistant materials are employed for both, allowing the transported medium to enter the outer protective tube and the inner layer to wear resistant
- the pipe will not only affect the durability of the pipe body, but also make the inner wear-resistant pipe have a certain buffer space when it is impacted, which is not easy to be broken.
- the buffer can also reduce the wear of the pipe body and increase the wear-resistant pipe. The service life. This is not expected by those skilled in the art anyway.
- the invention fixes the outer protective pipe and the inner wear-resistant composite pipe integrally by wear-resistant flange or other means, and does not generate friction consumption with each other, so that the design can at least reduce the overall weight of the pipe by more than 10%, and achieve the reduction. Cost, material saving, and resource conservation.
- the wear-resistant pipe of the invention has long service life and low price, and is several times higher than the cost performance of the existing products; it is also easy to realize mass production, stable and reliable quality, and high safety performance.
- Embodiment 1 is a schematic view showing the overall structure of a two- or multi-division double-layer wear-resistant tube in Embodiment 1 of the present invention, In the embodiment, it is made into a bent pipe.
- Figure 2 is a cross-sectional view showing the overall structure of a two- or multi-division double-layer wear-resistant tube in Embodiment 1 of the present invention.
- Figure 3 is a schematic view showing the structure of a tubular body portion of a two-part or multi-layer double-layer wear-resistant tube in Embodiment 1 of the present invention.
- Figure 4 is a schematic view showing the structure of a double-layered large bend 5 in the first embodiment of the present invention.
- Figure 5 is a schematic cross-sectional view showing the double-bend large bend 5 in the first embodiment of the present invention.
- Figure 6 is a schematic view showing the structure of the large bending outer protection portion 7 in the first embodiment of the present invention.
- Figure 7 is a cross-sectional structural view showing the large curved outer protective portion 7 in the first embodiment of the present invention.
- Figure 8 is a schematic view showing the structure of the inner layer wear-resistant large bend 8 in the first embodiment of the present invention.
- Figure 9 is a cross-sectional structural view showing the inner layer wear-resistant large bend 8 in the first embodiment of the present invention.
- Figure 10 is a schematic longitudinal sectional view showing the inner layer wear-resistant large bend 8 in the first embodiment of the present invention.
- Figure 11 is a schematic view showing the structure of a double-layered small bend 6 in Embodiment 1 of the present invention.
- Figure 12 is a cross-sectional structural view showing a double-layered small bend 6 in Embodiment 1 of the present invention.
- Figure 13 is a schematic view showing the structure of the small curved outer protective portion 11 in the first embodiment of the present invention.
- Figure 14 is a cross-sectional structural view showing the small curved outer protective portion 11 in the first embodiment of the present invention.
- Figure 15 is a schematic view showing the structure of the inner layer wear-resistant small bend 12 in the first embodiment of the present invention.
- Figure 16 is a cross-sectional structural view showing the inner layer wear-resistant small bend 12 in the first embodiment of the present invention.
- Figure 17 is a schematic view showing the structure of the wear-resistant connecting flange 3 in the first embodiment of the present invention.
- Figure 18 is a cross-sectional structural view showing the wear-resistant connecting flange 3 in the first embodiment of the present invention.
- Figure 19 is a schematic view showing the structure of the flange 15 in the first embodiment of the present invention.
- Figure 20 is a schematic cross-sectional view showing the flange 15 of the first embodiment of the present invention.
- Figure 21 is a schematic view showing the structure of the wear sleeve 16 in the first embodiment of the present invention.
- Figure 22 is a cross-sectional view showing the wear sleeve 16 of the first embodiment of the present invention.
- Figure 23 is a cross-sectional view showing the structure of a two- or multi-layer double-layer wear-resistant tube in Embodiment 2 of the present invention.
- a buffer chamber is added.
- Figure 24 is a schematic cross-sectional view showing the structure of a two- or multi-part double-layer wear-resistant impact tube in Embodiment 3 of the present invention, which is made into a straight tube in this embodiment.
- Figure 25 is a cross-sectional structural view showing a two- or multi-division double-layer wear-resistant anti-impact tube in Embodiment 3 of the present invention.
- Figure 26 is a cross-sectional structural view showing a two- or multi-division double-layer wear-resistant impact tube in Embodiment 4 of the present invention. It is intended that in the present embodiment, it is made into a straight tube.
- Figure 27 is a schematic cross-sectional view showing the structure of a two- or multi-part double-layer wear-resistant impact tube in Embodiment 5 of the present invention, which is made into a straight tube in this embodiment.
- the two-point or multi-layer double-layer wear-resistant anti-shock control is an elbow, which is composed of an outer protective tube 1 and an inner wear-resistant composite tube 2, both of which are All are elbow structures.
- the inner wear-resistant composite tube 2 is nested inside the outer protective tube 1.
- the outer protective tube 1 is used to protect the inner wear-resistant composite tube 2, so as to avoid unnecessary damage of the inner wear-resistant composite tube 2 during transportation, installation and use.
- the inner wear-resistant composite pipe 2 is divided into two parts: an inner wear-resistant large bend 8 and an inner wear-resistant small bend 12, both of which are half-bent pipes, which are spliced together to form a cross section. It is a ring-shaped inner layer wear-resistant composite tube 2.
- the inner wear-resistant large bend 8 and the inner wear-resistant small bend 12 are made of a wear-resistant material having different wear resistance.
- the inner wear-resistant large bend 8 and the inner wear-resistant small bend 12 in the inner wear-resistant composite pipe 2 are respectively made of high-chromium cast iron, medium-chromium cast iron, low-chromium cast iron, wear-resistant cast iron, ceramic, and hard alloy. , bearing steel, alloy steel, polymer materials and other wear-resistant materials made of different materials, the wear resistance of the inner layer wear-resistant large bending material is better than the small curved material.
- the average thickness ratio of the inner wear-resistant large bend to the inner wear-resistant small bend is set to 2:1, and the wear resistance ratio of the selected material is selected to be 2:1, so that an optimal service life can be obtained.
- the wear-resistant elbow can reach more than 2 times of the ordinary wear-resistant elbow.
- two wear-resistant connecting flanges 3 can be added in the embodiment, and two wear-resistant connecting flanges 3 are respectively welded to the outer protective tube 1 and the inner layer of the inner wear-resistant composite tube 2.
- the wear-resistant connecting flange 3 can both function to connect the pipe of the present invention with other pipes, and can also be used to fix the two portions of the inner wear-resistant composite pipe 2 to prevent displacement thereof.
- the outer protective tube 1 and the inner wear-resistant composite tube 2 may be fixed by a connecting flange or other forms, and are not limited to the manner of connecting the flanges.
- the outer protective tube 1 can also be divided into two parts: a large curved outer protective portion 7, and a small curved outer protective portion 11, which are welded to each other to form an outer protective tube 1 having a circular cross section.
- the outer protective layer is made of low alloy steel or medium and low carbon steel. It should be noted that the outer protective tube 1 may also be integrally cast or extruded.
- the large curved outer protective portion 7 and the small curved outer protective portion 11 are provided; the large curved outer protective portion 7 has a large curved inner portion.
- the inner protective portion 9 has a small curved outer protective portion inner matching surface 13 inside the small curved outer protective portion 11; wherein the large curved outer protective portion 7 and the small curved outer protective portion 11 have a circular arc of arbitrary degrees. But the two halves combine to form a 360 degree circle in cross section.
- the inner layer wear-resistant large bend 8 is provided; and the inner layer wear-resistant large bend outer joint surface 10 is provided outside the inner layer wear-resistant large bend 8; the inner layer The wear-resistant large curved outer matching surface 10 is an inner layer wear-resistant large curved 8 outer circular surface.
- the inner wear-resistant large bend 8 is designed to thicken from the two ends A to the middle B and thicken from the both sides C to the middle D, ensuring high wear resistance at the intermediate position of the large bend.
- the inner layer wear-resistant small bend 12 is provided; and the inner layer wear-resistant small bend outer surface 14 is provided outside the inner layer wear-resistant small bend 12; the inner layer wear-resistant The small curved outer matching surface 14 is an inner layer wear-resistant small curved 12 outer circular surface; wherein the inner layer wear-resistant small curved 12 is designed to be equal thickness and unequal thickness, as long as the small bending also has a certain wear resistance. .
- a wear-resistant connecting flange 3 is provided; it is composed of a flange 15 and a wear-resistant sleeve 16; and the wear-resistant sleeve 16 is installed inside the flange 15.
- the structure of the wear-resistant connecting flange 3 is as shown in Figs. 18 and 19, and its design position is as indicated by reference numeral 3 in Figs.
- a wear-resistant sleeve 16 is provided; and a wear-resistant sleeve matching slope 19 is provided thereon; The matching slope 19 is disposed on the outer edge of the wear sleeve 16.
- the large curved outer protection portion 7 described in this embodiment is preferably a bent pipe formed by forging a low alloy steel or a medium and low carbon steel; the inner curved portion 9 is provided with a large curved outer protective portion; the function is to protect the curved portion
- the wear layer of the inner layer of the tube is not deformed or even damaged by the impact of the external force during the transportation, installation and use, and is deformed or even damaged by the internal fluid impact force.
- the inner layer wear-resistant large bend 8 described in this embodiment is preferably cast from high chromium cast iron, low chromium cast iron, medium chromium cast iron, alloy steel, bearing steel forging, ceramic, hard alloy sintering, polymer material synthesis and resistance.
- the inner matching surface 9 of the large curved outer protective portion described in the embodiment refers to a matching surface provided on the large curved outer protective portion 7; the function is to facilitate the large curved outer protective portion 7 and the inner layer wear-resistant large curved 8 installation.
- the inner layer wear-resistant large curved outer matching surface 10 in the embodiment refers to: a matching surface provided on the inner layer wear-resistant large bend 8; the function is to facilitate the large-bend outer protective portion 7 and the inner layer to wear large Bend 8 installation.
- the small curved outer protection portion 11 described in this embodiment means: forging from a low alloy steel or a medium or low carbon steel material. a semi-bent pipe; the inner side of the small curved outer protective portion is provided with a matching surface 13; the function is to protect the wear layer of the inner layer of the curved pipe from being impacted by external force during transportation, installation and use, It is deformed or even damaged by hitting, and is deformed or even damaged by internal fluid impact.
- the inner layer wear-resistant small bend 12 described in this embodiment refers to: casting from high chromium cast iron, low chromium cast iron, medium chromium cast iron, alloy steel, bearing steel forging, ceramic, hard alloy sintering, polymer material synthesis and Wear-resistant elbow made of wear-resistant electrode surfacing; it is provided with an inner layer wear-resistant small curved outer matching surface 14; its function is to increase the wear resistance of the small bend.
- the flange 15 described in this embodiment refers to: the components of the wear-resistant connecting flange 2; and is provided with a flange matching slope 17 and a connecting card slot 18; the function of the flange is to facilitate the bending of the tube and other equipment. Connect to install.
- the wear-resistant sleeve 16 described in this embodiment refers to: cast from high chromium cast iron, low chromium cast iron, medium chromium cast iron, alloy steel, bearing steel forging, ceramic, hard alloy sintering, polymer material synthesis and wear resistant electrode
- the wear-resistant sleeve is formed by surfacing; and a wear-resistant sleeve matching slope 19 is provided thereon; the function is to prolong the service life of the wear-resistant connecting flange 2 and improve the sealing property.
- the flange matching slope 17 described in this embodiment refers to a matching slope provided inside the flange 15; the function is to facilitate the installation of the flange 15 and the wear sleeve 16.
- the connecting card slot 18 described in this embodiment refers to a card slot provided on the outer circumference of the flange 15; its function is to facilitate the mounting of the flange 15 and other devices.
- the wear sleeve engagement slope 19 described in this embodiment refers to a matching slope provided on the outer circumference of the wear sleeve 16; the function is to facilitate the installation of the flange 15 and the wear sleeve 16.
- the two- or multi-divided double-layer wear-resistant anti-shock tube is composed of an outer protective tube 1 and an inner wear-resistant composite tube 2.
- the inner wear-resistant composite tube 2 is nested inside the outer protective tube 1.
- the outer protective tube 1 is used to protect the inner wear-resistant composite tube 2 to avoid unnecessary damage during transportation, installation and use.
- the outer protective tube 1 is divided into two parts: a large curved outer protective portion 7 and a small outer curved protective portion 11, which are welded to each other to form an outer protective tube 1 having a circular cross section.
- the inner layer wear-resistant composite tube 2 is divided into two parts: an inner layer wear-resistant large bend 8 and an inner layer wear-resistant small bend 12, which are spliced together to form an inner layer wear-resistant composite tube 2 having a circular cross section.
- the inner wear-resistant large bend 8 and the inner wear-resistant small bend 12 are made of materials having different wear resistance.
- two wear-resistant connecting flanges 3 are also added, and two wear-resistant connecting flanges 3 are respectively welded to the outer protective tube 1 and the inner layer of the inner wear-resistant composite tube 2.
- Wear-resistant connecting flange 3 can be used to connect elbows and other tubes The function of the track can be used to fix the two parts of the inner wear-resistant composite pipe 2 to avoid displacement.
- the inner wear-resistant large bend 8 and the inner wear-resistant small bend 12 leave a filling passage 4 at the junction with each other to allow the conveyed medium to enter between the outer protective tube 1 and the inner wear-resistant composite tube 2.
- a buffer chamber 20 is reserved between the inner wear-resistant composite tube 2 and the outer protective tube 1.
- the filling channel 4 of the present invention refers to a gap preset between the inner layer wear-resistant large bend 8 and the inner layer wear-resistant small bend 12 for allowing the transport medium to penetrate into the two-layer pipeline; As indicated by reference numeral 4 in Figs. Further, it should be noted that the large curved outer protective portion 7 and the small curved outer protective portion 11 may be separately cast and then welded together, or may be integrally formed. Both can be made of the same material or of different materials.
- the filling passage 4 between the large bend and the small bend is reserved;
- the filling channel 4 then the inner layer wear-resistant large bend is not in direct contact with the inner layer wear-resistant small bend, so that the inner layer wear-resistant large bend 8 is not required to be completely consistent with the inner layer wear-resistant small bend 12 edge processing, and the reduction is reduced.
- the processing difficulty; the filling channel 4 is directly connected to the reserved buffer cavity 20, and the filling of the buffer cavity 20 is more easily realized.
- the inner layer of the inner layer wear-resistant composite tube 2 is made of high-chromium cast iron, low-chromium cast iron, medium-chromium cast iron, and the inner layer wear-resistant large bend and the inner layer wear-resistant small bend.
- the HRC is the material hardness value measured by a Rockwell hardness tester.
- the bending tube is not used, and the manufacturing cost is increased by 10-15% under the condition that the material composition and thickness are constant.
- the life is equivalent and the cost is increased compared with the wear-resistant bend tube obtained in the present application, and if the cost is equal, The life is reduced.
- the life is reduced compared with the wear-resistant bent tube obtained in the present application.
- the two- or multi-layer double-layer wear-resistant and impact-resistant control is a two-layer double-layer straight pipe, which is composed of an outer protective tube 1 and an inner wear-resistant composite tube. 2 composition, both are straight tube structures.
- the inner wear-resistant composite tube 2 is nested inside the outer protective tube 1.
- the inner wear-resistant composite pipe 2 is divided into two parts: an upper wear-resistant pipe wall 31 and a lower wear-resistant pipe wall 32, both of which are half-pipes having a semi-circular cross section, which are spliced together to form a ring-shaped cross section.
- the upper wear tube wall and the lower wear tube wall are made of a wear resistant material having different wear resistance.
- the wear resistance of the material used for the lower wear tube wall is better than the wear resistance of the upper wear tube wall.
- the upper wear-resistant pipe wall and the lower wear-resistant pipe wall in the inner wear-resistant composite pipe 2 are respectively made of high-chromium cast iron, medium-chromium cast iron, low-chromium cast iron, wear-resistant cast iron, ceramic, cemented carbide, bearing steel, It is made of wear-resistant materials with different materials such as alloy steel and polymer materials.
- the structure of the present invention is particularly suitable for conveying powders and solid-liquid mixtures having high wear strength, and the wear and impact of the materials on the lower pipe wall during transportation are much larger than that of the upper pipe wall, because the lower wear-resistant pipe wall is used.
- the overall pipe is more resistant to wear and impact.
- the thickness of the lower tube wall is greater than the upper tube wall, so that the wear resistance and service life of the tube of the present invention can be more than twice that of the ordinary pipe under the same weight as compared with the conventional pipe. .
- a gap is left between the upper tube wall and the lower tube wall to serve as a filling passage to allow the conveyed medium to enter between the outer protective tube 1 and the inner wear-resistant composite tube 2. It should be noted that, although the gap is left, the relative position between the respective tube walls in the combined tube can be maintained by the crushing between the adjacent side walls (or the end flange pair can also be The pipe wall is relatively fixed).
- the inner layer wear-resistant composite tube 2 A buffer chamber may be reserved between the inner wear-resistant composite tube 2 and the outer protective tube 1. This implementation is particularly suitable for use in situations where the transported medium is capable of solidifying. By adding a buffer chamber, the inner tube can be provided with a buffer space without being broken by a sudden impact, and the problem that the inner wall is excessively hard and the crack is caused by the impact wear is reduced.
- the two- or multi-layer double-layer wear-resisting anti-shock control is a three-layer double-layer straight pipe, which is composed of an outer protective tube 1 and an inner wear-resistant composite tube 2. Both are straight tube structures.
- the inner wear-resistant composite tube 2 is nested inside the outer protective tube 1.
- the inner wear-resistant composite pipe 2 is divided into three parts: a lower wear-resistant pipe wall 41, a left upper pipe wall 42 and a right upper pipe wall 43, and each of the three portions has a curved cross section and is spliced together.
- the inner layer wear-resistant composite tube 2 having a circular cross section.
- the material of at least the lower wear-resistant tube wall 41 of the upper wear-resistant tube wall 41, the upper left-side tube wall 42, and the upper right-side tube wall 43 is different from the other portions.
- the material used for the lower wear tube wall has better wear resistance than the upper left side wall 42 and the upper right side wall 43.
- the lower wear tube wall 41, the upper left side tube wall 42 and the upper right side tube wall 43 of the inner layer wear-resistant composite tube 2 are respectively made of high chromium cast iron, medium chromium cast iron, low chromium cast iron, wear resistant cast iron, ceramic, Carbide, bearing steel, alloy steel, polymer materials and other wear-resistant materials made of different materials.
- a gap is left between adjacent two tube walls to serve as a filling passage to allow the conveyed medium to enter between the outer protective tube 1 and the inner wear-resistant composite tube 2.
- a gap may be reserved between the inner wear-resistant composite tube 2 and the outer protective tube 1.
- Buffer chamber This implementation is particularly suitable for use in situations where the transported medium is capable of solidifying.
- a buffer chamber is provided only between the lower tube wall and the outer layer protection tube 1, since the lower tube wall receives the most intense impact.
- the two- or multi-layer double-layer wear-resistant and impact-resistant control is a four-layer double-layer straight pipe, which is composed of an outer protective tube 1 and an inner wear-resistant composite tube 2, both of which are straight. Tube construction.
- the inner wear-resistant composite tube 2 is nested inside the outer protective tube 1.
- the inner wear-resistant composite pipe 2 is divided into four parts: an upper wear-resistant pipe wall 51, a lower wear-resistant pipe wall 52, a left-side pipe wall 53 and a right-side pipe wall 54, and each of the four sections has an arc of a cross section. Shapes, spliced together to form an inner wear-resistant composite tube 2 having a circular cross section.
- the material used in at least the lower wear-resistant tube wall of the right side wall 54 is different from the other parts, preferably, the upper wear-resistant tube wall 51 and the lower wear-resistant tube wall 52 and the left-side tube wall 53 and the right-hand tube wall 54.
- the materials are also different, and the materials of the left side wall 53 and the right side wall 54 are identical to each other.
- the wear resistance of the material of the lower wear tube wall 52 is superior to that of the left side wall 53 and the right side wall 54, and the wear resistance of the material of the left side wall 53 and the right side wall 54 is superior to Upper wear tube wall 51.
- the upper wear-resistant tube wall 51, the lower wear-resistant tube wall 52, the left-side tube wall 53, and the right-side tube wall 54 in the inner layer wear-resistant composite tube 2 are respectively made of high-chromium cast iron, medium-chromium cast iron, and low-chromium cast iron.
- wear-resistant materials such as wear-resistant cast iron, ceramics, hard alloys, bearing steels, alloy steels, and polymer materials.
- the upper tube wall 51 and the lower tube wall 52 can also be symmetrically arranged so that the two can be used interchangeably, that is, the upper and lower portions can be replaced, and the use is more convenient.
- the advantage of using the heterogeneous material in the inner wear-resistant composite pipe of the invention is that the material with high wear resistance and impact resistance can be selected for the part with high impact force and easy wear, and the impact force is small.
- the place can use materials with low wear resistance and impact resistance. Therefore, this method not only saves the raw material cost in manufacturing, but also improves the wear resistance and prolongs the service life.
- the inner layer wears high-elastic cast iron
- the inner layer wears small bends and uses alloy steel.
- the unit price of high-chromium cast iron is about 20 yuan/Kg
- the unit price of alloy steel is about 4 yuan/ Kg
- the overall cost is reduced by more than 40%, which is a huge breakthrough in the field of pipeline preparation.
- the components in the various embodiments of the present invention may be combined and replaced with each other, and these are all included in the scope of the present invention.
- the tube body of the present invention may also be shaped, and those skilled in the art only need to appropriately adjust according to the principle of the present invention according to actual conditions, which is also included in the scope of the present invention.
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- Engineering & Computer Science (AREA)
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Abstract
Description
Claims (33)
- 一种两分或多分双层式耐磨抗冲击管,所述耐磨抗冲击管包括:外层保护管(1)以及内层耐磨组合管(2),其特征在于,所述内层耐磨组合管(2)嵌套在所述外层保护管(1)内,所述内层耐磨组合管(2)由两片或多片管壁组成,所述两片或多片管壁拼接在一起,形成横截面为环状的管体。
- 根据权利要求1所述的两分或多分双层式耐磨抗冲击管,其特征在于,如果所述内层耐磨组合管(2)由两片管壁组成,则两片管壁的材质彼此不同;如果所述内层耐磨组合管(2)由多片管壁组成,则多片管壁中的至少两片的材质彼此不同。
- 根据权利要求1或2所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述内层耐磨组合管(2)中至少两片管壁的厚度彼此不同。
- 根据权利要求1或2所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述两片或多片管壁在彼此拼接形成管体时,相邻管壁之间设置预定宽度的填充通道。
- 根据权利要求4所述的两分或多分双层式耐磨管耐磨抗冲击管,其特征在于,所述填充通道为相邻管壁之间预留的间隙,所述填充通道的宽度为0.5-2mm。
- 根据权利要求5所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述填充通道的宽度为1mm。
- 根据权利要求1所述的两分或多分双层式耐磨抗冲击管,其特征在于,还包括耐磨连接法兰(3),所述耐磨连接法兰(3)由法兰与耐磨套组成;耐磨套安装在法兰内部,两个所述耐磨连接法兰(3)分别焊接在外层保护管(1)、内层耐磨组合管(2)的两端。
- 根据权利要求7所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述耐磨套上设有耐磨套契合斜面;耐磨套契合斜面设于耐磨套外缘上。
- 根据权利要求1所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述耐磨抗冲击管为耐磨弯管,所述耐磨弯管的内层耐磨组合管(2)由内层耐磨大弯与内层耐磨小弯组成;内层耐磨大弯与内层耐磨小弯由耐磨性能不同的材质构成。
- 根据权利要求9所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述 外层保护管(1)包括大弯外保护部分和小弯外保护部分,所述外层保护管(1)所采用的材料与所述内层耐磨组合管(2)所采用的材料彼此不同,所述大弯外保护部分位于所述内层耐磨大弯外侧,所述小弯外保护部分位于所述内层耐磨小弯外侧,所述大弯外保护部分和小弯外保护部分沿侧部焊接在一起,形成横截面为环状的管体,并且,所述大弯外保护部分与所述小弯外保护部分在端部的径口边沿处通过焊接方式连接在一起。
- 根据权利要求9所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述大弯外保护部分与所述小弯外保护部分由低合金钢或中低碳钢材料制成。
- 根据权利要求9所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述内层耐磨大弯所采用耐磨材料的耐磨性能优于所述内层耐磨小弯的耐磨材料。
- 根据权利要求1所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述内层耐磨组合管中的管壁由高铬铸铁、中铬铸铁、低铬铸铁、耐磨铸铁、陶瓷、硬质合金、轴承钢、合金钢以及高分子材料中的一种制成。
- 根据权利要求9所述的两分或多分双层式耐磨抗冲击管,其特征在于,内层耐磨大弯设计为从两端A向中部B变厚与两侧C向中部D变厚。
- 根据权利要求9所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述大弯外保护部分与内层耐磨大弯之间以及小弯外保护部分与内层耐磨小弯之间还设有缓冲腔。
- 根据权利要求1所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述耐磨抗冲击管为耐磨直管。
- 根据权利要求16所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述耐磨直管的内层耐磨组合管(2)在其横截面的圆周方向上具有不同厚度。
- 根据权利要求16所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述内层耐磨组合管(2)中位于底部的管壁所采用材料的耐磨性能优于位于侧部和顶部的侧壁所采用的材料的耐磨性能。
- 根据权利要求1所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述耐磨抗冲击管为异形管。
- 根据权利要求19所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述异型管的内层耐磨组合管根据各部位磨损强度的不同,而采用不同的耐磨材料制 成。
- 根据权利要求1-20中任一项所述的两分或多分双层式耐磨抗冲击管的制备方法,其特征在于,所述方法包括:(A)制备内层耐磨组合管(2),制备过程包括:(A1)分别制备两片或多片管壁,所述两片或多片管壁顺序拼接在一起能够构成管状结构;(A2)将所述两片或多片管壁顺序拼接在一起,形成横截面为环状的内层耐磨组合管(2);(B)制备外层保护管(1),并将外层保护管(1)设置在内层耐磨组合管(2)外侧;(C)将外层保护管(1)和内层耐磨组合管(2)的两端组合在一起。
- 根据权利要求21所述的两分或多分双层式耐磨抗冲击管的制备方法,其特征在于,内层耐磨组合管(2)中的各管壁中,至少两片由不同材质的耐磨材料制成。
- 根据权利要求22所述的两分或多分双层式耐磨抗冲击管的制备方法,其特征在于,在所述步骤(A2)中,在将两片或多片管壁拼接形成管体时,在相邻管壁之间设置预定宽度的填充通道。
- 根据权利要求23所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述填充通道为相邻管壁之间预留的间隙。
- 根据权利要求23所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述填充通道的宽度为0.5-2mm。
- 根据权利要求25所述的两分或多分双层式耐磨抗冲击管,其特征在于,所述填充通道的宽度为1mm。
- 根据权利要求21所述的两分或多分双层式耐磨抗冲击管的制备方法,其特征在于,所述耐磨抗冲击管为耐磨弯管,其内层耐磨组合管包括内层耐磨大弯和内层耐磨小弯,所述内层耐磨大弯所采用耐磨材料的耐磨性能优于内层耐磨小弯所采用耐磨材料的耐磨性能。
- 根据权利要求27所述的两分或多分双层式耐磨抗冲击管的制备方法,其特征在于,内层耐磨大弯设计为从两端A向中部B变厚与两侧C向中部D变厚。
- 根据权利要求21所述的两分或多分双层式耐磨抗冲击管的制备方法,其特征在于,所述耐磨抗冲击管为耐磨直管,所述耐磨直管的内层耐磨组合管(2)在其横截面的圆周方向上具有不同厚度。
- 根据权利要求21所述的两分或多分双层式耐磨抗冲击管的制备方法,其特征在于,所述两片或多片管壁中的一个由耐磨铸铁、陶瓷、硬质合金中一种制成,另一个由合金钢、高分子材料中的一种制成。
- 根据权利要求21所述的两分或多分双层式耐磨抗冲击管的制备方法,其特征在于,所述耐磨抗冲击管为异形管,所述异型管的内层耐磨组合管根据各部位磨损强度的不同,而采用不同的耐磨材料制成。
- 根据权利要求21所述的两分或多分双层式耐磨抗冲击管的制备方法,其特征在于,所述方法还包括制备耐磨连接法兰(3),所述耐磨连接法兰(3)由法兰与耐磨套组成;耐磨套安装在法兰内部,耐磨套上设有耐磨套契合斜面;耐磨套契合斜面设于耐磨套外圆上。
- 根据权利要求23所述的两分或多分双层式耐磨抗冲击管的制备方法,其特征在于,所述方法还包括在所述外层保护管(1)与内层耐磨组合管(2)之间设置缓冲腔。
Priority Applications (4)
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EP16761106.0A EP3270029B1 (en) | 2015-03-12 | 2016-03-10 | Two-branch or multi-branch double-layer wear-and-impact-resistant tube and manufacturing method thereof |
US15/557,403 US20180259113A1 (en) | 2015-03-12 | 2016-03-10 | Two-branch or multi-branch double-layer wear-and-impact-resistant tube and manufacturing method thereof |
JP2017566186A JP2018511764A (ja) | 2015-03-12 | 2016-03-10 | 二分割又は多分割の二重式耐摩耗・耐衝撃パイプ及びその製造方法 |
LTEP16761106.0T LT3270029T (lt) | 2015-03-12 | 2016-03-10 | Dviejų arba kelių dalių dvisluoksnis, susidėvėjimui ir smūgiams atsparus vamzdis ir jo gamybos būdas |
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CN201510108071.8A CN104653934A (zh) | 2015-03-12 | 2015-03-12 | 一种两分双层式耐磨抗冲击弯管 |
CN201510108071.8 | 2015-03-12 | ||
CN201510480201 | 2015-08-08 | ||
CN201510480201.0 | 2015-08-08 |
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EP (1) | EP3270029B1 (zh) |
JP (1) | JP2018511764A (zh) |
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CN105673979B (zh) * | 2015-03-12 | 2018-07-17 | 周朝辉 | 一种两分双层式耐磨抗冲击弯管及其制备方法 |
CN206600533U (zh) * | 2017-02-06 | 2017-10-31 | 周朝辉 | 一种用于混凝土输送的异质分段式高耐磨双层直管 |
CZ307295B6 (cs) * | 2017-03-10 | 2018-05-16 | Msv Systems Cz S. R. O. | Forma pro pecní a/nebo parní ohýbání plastových nebo pryžových trubek a způsob její výroby |
CN107695304A (zh) * | 2017-10-10 | 2018-02-16 | 桐城市文才管业有限公司 | 一种弯管制造方法 |
EP3617578B1 (en) * | 2018-08-31 | 2021-06-09 | Iin Konepaja Ltd | Supply chute for stone material |
AT522001B1 (de) * | 2019-01-08 | 2020-10-15 | Ke Kelit Kunststoffwerk Ges M B H | Rohrverbindung, nämlich Rohrknie |
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Also Published As
Publication number | Publication date |
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EP3270029B1 (en) | 2020-03-04 |
LT3270029T (lt) | 2020-07-10 |
US20180259113A1 (en) | 2018-09-13 |
CN105526449A (zh) | 2016-04-27 |
EP3270029A4 (en) | 2018-10-31 |
CN105673979B (zh) | 2018-07-17 |
EP3270029A1 (en) | 2018-01-17 |
JP2018511764A (ja) | 2018-04-26 |
CN105526449B (zh) | 2018-03-20 |
CN105673979A (zh) | 2016-06-15 |
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