Conveying pipeline
By adopting an annular sealing structure and clamping fixing components at the connections of the ore slurry pipelines, the problem of insufficient sealing performance at the connections of the steel pipes is solved, and an efficient sealing effect is achieved, extending the service life of the pipeline.
Patent Information
- Application Number
- CN202411660741.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2024-12-24
AI Technical Summary
During the transportation of ore slurry pipelines, the sealing performance of steel pipes cannot meet the high pressure requirements due to wear and corrosion, especially at the connection of steel pipes, the sealing performance of non-metal lining materials is insufficient.
Using a structure including an outer tube, an inner liner tube, a flange, a sealing gasket and a clamping fixing assembly, an annular seal is formed by a sealing flange of the flange and a sealing portion of the inner liner tube, combining the first and second seals. The ring and bolted connection pair realize two ring-shaped seals to avoid direct pressure on the inner liner and improve sealing performance.
It significantly improves the sealing performance of the conveying pipe, extends the service life of the pipe, and avoids leakage and corrosion problems caused by poor sealing.
Smart Images
Figure CN119178073A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of mechanical manufacturing, in particular to a conveying pipeline. Background Art
[0002] With the development of long-distance slurry pipeline transportation technology, the transportation distance of slurry pipeline transportation is getting longer and longer, and the transportation pressure is getting higher and higher. During the slurry transportation process, the solid particles in the slurry will cause wear on the steel pipe. At the same time, the pH value of some slurry transportation carriers is acidic, or contains more chloride ions and sulfate ions, which will accelerate the corrosion of steel pipes. Therefore, more and more slurry pipelines use non-metallic materials (such as rubber, high molecular weight polyvinyl chloride, and ultra-high molecular weight polyvinyl chloride) to line the steel pipe to increase the service life of the pipeline.
[0003] At the connection between steel pipes, non-metallic lining materials are sealed by mutual extrusion, and their sealing performance cannot meet the requirements of higher conveying pressure. Summary of the invention
[0004] The object of the present invention is to provide a conveying pipeline with better sealing performance.
[0005] The present invention provides a conveying pipeline, which includes a conveying pipe, a clamping and fixing assembly and a sealing gasket. The conveying pipe includes an outer pipe and an inner liner. The outer pipe has a flange at the end. The conveying pipes are connected to each other through the flange. An annular sealing flange is protruding from the axial end surface of the flange. The inner liner has a tubular portion and an annular sealing portion. The tubular portion is attached to the inner surface of the outer pipe. The sealing portion is attached to the axial end surface of the flange and is located radially inward of the sealing flange. The clamping and fixing assembly can clamp and fix two flanges in the axial direction. The sealing gasket is arranged between the two connected flanges and includes a first sealing ring and a second sealing ring. The first sealing ring is opposite to the sealing flange in the axial direction. The first sealing ring is sealed and clamped between the two sealing flanges. The second sealing ring is arranged radially inward of the first sealing ring and is sealed and clamped between the sealing portions of the two inner liner pipes in the axial direction.
[0006] The delivery pipeline can form two annular seals at the connection of the delivery pipe, thereby achieving better sealing performance.
[0007] In another exemplary embodiment of the conveying pipeline, both side end surfaces of the second sealing ring are protrudingly provided with annular teeth extending in the circumferential direction. The annular teeth of the second sealing ring are sealingly embedded in the sealing parts on both sides by extrusion deformation, thereby facilitating improved sealing performance.
[0008] In another exemplary embodiment of the delivery pipeline, the inner liner pipes of the connected delivery pipelines do not directly contact each other. This helps to avoid the inner liner pipes directly pressing against each other and forming a bulge on the inner wall of the delivery pipeline. Such a bulge will accelerate the wear of the inner liner pipe and cause leakage.
[0009] In another exemplary embodiment of the conveying pipeline, the clamping force of the sealing flanges on both sides of the first sealing ring is greater than the clamping force of the sealing parts on both sides of the second sealing ring, which is conducive to improving the sealing performance.
[0010] In another exemplary embodiment of the conveying pipeline, the clamping and fixing assembly includes a plurality of bolt connection pairs. The bolts of each bolt connection pair are inserted into two connected flanges. The plurality of bolt connection pairs are distributed circumferentially on the radial outer side of the sealing gasket. The outer edge of the sealing gasket is tangent to the bolts of the plurality of bolt connection pairs. This facilitates the positioning of the sealing gasket during assembly.
[0011] In another exemplary embodiment of the conveying pipeline, a gap is provided between the sealing flange and the sealing portion in the radial direction, so that during the assembly process, the protruding portion of the sealing portion due to the extrusion deformation with the second sealing ring can enter the gap, thereby avoiding the generation of unnecessary stress, thereby facilitating the improvement of the stability of the structure.
[0012] In another exemplary embodiment of the conveying pipeline, the radially outer portions of the two connected flanges are spaced apart in the axial direction to form a gap. In this way, the clamping force of the clamping and fixing assembly on the two flanges can produce a lever effect at the sealing flange, which is beneficial to improving the sealing performance between the first sealing ring and the sealing flange.
[0013] In another exemplary embodiment of the conveying pipeline, the first sealing ring includes a supporting layer arranged in layers along the axial direction and a covering layer covering both sides of the supporting layer. Both end surfaces of the supporting layer are protrudingly provided with annular teeth extending in the circumferential direction. The covering layer covers the tooth surface of the annular teeth of the supporting layer. This helps to improve the sealing performance between the first sealing ring and the sealing flange.
[0014] In another exemplary embodiment of the conveying pipeline, the sealing gasket includes an integrally formed main body, which is provided with a supporting layer of a first sealing ring and a second sealing ring, so that processing is convenient.
[0015] In another exemplary embodiment of the conveying pipeline, the outer tube is made of carbon steel, stainless steel or alloy steel; the inner lining tube is made of rubber, high molecular weight polyethylene, ultra-high molecular weight polyethylene or polyurethane; the supporting layer of the first sealing ring is made of aluminum, copper, titanium, carbon steel, stainless steel or alloy steel; the covering layer of the first sealing ring is made of rubber, polytetrafluoroethylene, flexible graphite or non-asbestos fiber; and / or the second sealing ring is made of aluminum, copper, titanium, carbon steel, stainless steel or alloy steel. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The following drawings are only used to schematically illustrate and explain the present invention, and do not limit the scope of the present invention.
[0017] Figure 1 A cross-sectional view of a schematic embodiment of a conveying pipeline.
[0018] Figure 2 for Figure 1 Enlarged view of part II.
[0019] Figure 3 for Figure 2 Enlarged view of part III.
[0020] Figure 4 Shows Figure 1 An axial view of the sealing gasket is shown.
[0021] Figure 5 for Figure 1 A cross-sectional view of the sealing gasket is shown.
[0022] Figure 6 A cross-sectional view of another exemplary embodiment of a sealing gasket.
[0023] Description of symbols 10 Delivery pipe 11 External tube 113 Flange T sealing flange 12 Liner pipe 121 Tubular part 122 Sealing part 30 Clamping and fixing components 31 Bolt connection pair 311 Bolts 50 Sealing gasket B Main Body 51 First sealing ring C1 Support Layer C2 Overlay 52 Second sealing ring L Axis of flange A Axial direction of flange R is the radial direction of the flange. DETAILED DESCRIPTION
[0024] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.
[0025] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.
[0026] In this article, "first", "second", etc. do not indicate their importance or order, but are only used to indicate the difference between each other for the convenience of document description.
[0027] In order to simplify the drawings, each figure only schematically shows the parts related to the present invention, which do not represent the actual structure of the product.
[0028] Figure 1 FIG. 4 is a cross-sectional view of a schematic embodiment of a conveying pipeline. Figure 1 As shown, the delivery pipeline includes a delivery pipe 10, a clamping and fixing assembly 30 and a sealing gasket 50. Every two delivery pipes 10 are fixedly connected to each other through a clamping and fixing assembly 30. A sealing gasket 50 is arranged between every two fixedly connected delivery pipes 10. This exemplary embodiment is specifically described by taking a delivery pipeline consisting of two delivery pipes 10, a clamping and fixing assembly 30 and a sealing gasket 50 as an example. In other exemplary embodiments, the number of delivery pipes 10, clamping and fixing assemblies 30 and sealing gaskets 50 of the delivery pipeline can be adjusted as needed.
[0029] like Figure 1 As shown, each delivery pipe 10 includes an outer pipe 11 and an inner liner pipe 12. The material of the outer pipe 11 is, for example, carbon steel, stainless steel or alloy steel, and the material of the inner liner pipe 12 is, for example, rubber, high molecular polyethylene, ultra-high molecular polyethylene, polyurethane and other non-metallic materials, but not limited thereto. The end of the outer pipe 11 has a flange 113. The two delivery pipes 10 are connected to each other through the flange 113 of their outer pipes 11. In this exemplary embodiment, for the sake of clarity, the axis L, axial direction A, and radial direction R of the flange 113 are used to assist in the explanation. In the following text, "axial" refers to the axial direction of the flange 113, "radial" refers to the radial direction of the flange 113, and "circumferential" refers to the circumferential direction of the flange 113.
[0030] Figure 2 for Figure 1 Enlarged view of part II. Figure 3 for Figure 2 The enlarged view of the middle part III. Figure 2 and Figure 3 As shown, the axial end surface of the flange 113 is provided with an annular sealing flange T. The sealing flange T is annular and extends in the circumferential direction. Figure 2As shown, the inner liner 12 has a tubular portion 121 and an annular sealing portion 122. The tubular portion 121 is attached to the inner surface of the outer tube 11. The sealing portion 122 is connected to the end of the tubular portion 121 and extends in an annular shape along the circumferential direction. The sealing portion 122 is attached to the axial end surface of the flange 113 and is located radially inside the sealing flange T.
[0031] The clamping and fixing assembly 30 can clamp and fix the two flanges 113 in the axial direction. In this exemplary embodiment, each clamping and fixing assembly 30 includes 8 bolt connection pairs 31 ( Figure 1 Only two of them can be seen in the figure). The bolt connection pair 31 is composed of, for example, bolts, nuts and washers. The bolts 311 of each bolt connection pair 31 are inserted into the two connected flanges 113. The eight bolt connection pairs 31 are evenly distributed along the circumference. In the exemplary embodiment, the number of bolt connection pairs 31 of each clamping and fixing assembly 30 can be adjusted as needed.
[0032] like Figure 1 and Figure 2 As shown, the sealing gasket 50 is disposed between the two connected flanges 113 to play a sealing role. The main material of the sealing gasket 50 is, for example, aluminum, copper, titanium, carbon steel, stainless steel (such as 316L stainless steel), alloy steel and other metal materials, but is not limited thereto. Figure 2 and Figure 3 As shown, the sealing gasket 50 includes a first sealing ring 51 and a second sealing ring 52. The first sealing ring 51 and the second sealing ring 52 are both annular and extend in the circumferential direction. The first sealing ring 51 is opposite to the sealing flange T in the axial direction. The first sealing ring 51 is sealed and clamped between the two sealing flanges T to form a first annular seal. The second sealing ring 52 is arranged on the radial inner side of the first sealing ring 51, and is sealed and clamped between the sealing portions 122 of the two inner liner pipes 12 in the axial direction to form a second annular seal.
[0033] The delivery pipeline can form two annular seals at the connection of the delivery pipe, thereby achieving better sealing performance.
[0034] like Figure 3 As shown, in the exemplary embodiment, both side end surfaces of the second sealing ring 52 are protrudingly provided with a plurality of annular teeth extending in the circumferential direction, and the plurality of annular teeth are in the shape of concentric circles (see Figure 4 , Figure 4 The axial view of the sealing gasket is shown. The annular teeth of the second sealing ring 52 are sealedly embedded in the sealing parts 122 on both sides by extrusion deformation. This helps to improve the sealing performance. The material of the second sealing ring 52 is, for example, aluminum, copper, titanium, carbon steel, stainless steel (such as 316L stainless steel), alloy steel and other metal materials, but is not limited thereto.
[0035] like Figure 2As shown, in the exemplary embodiment, the inner liner pipes 12 of the connected delivery pipes 10 are not directly pressed against each other, but are indirectly pressed against each other through the sealing gasket 50. Figure 2 As shown, the sealing portions 122 of the two liner pipes 12 are spaced apart to form a gap X1 on the radial inner side of the sealing gasket 50. This helps to prevent the liner pipes 12 from directly pressing against each other and protruding from the inner wall of the conveying pipeline to form a bulge. Such a bulge will accelerate the wear of the liner pipe 12 and cause leakage.
[0036] In the exemplary embodiment, the clamping force of the sealing flanges T on both sides of the first sealing ring 51 is greater than the clamping force of the sealing portion 122 on both sides of the second sealing ring 52. That is, the first annular seal formed between the first sealing ring 51 and the sealing flange T plays a major sealing role, and the second annular seal formed between the second sealing ring 52 and the sealing portion 122 of the liner pipe 12 plays an auxiliary sealing role. The main purpose of the second annular seal is to prevent the liquid in the conveying pipeline from contacting and corroding the sealing flange T. This is conducive to improving the sealing performance.
[0037] like Figure 4 As shown, in the exemplary embodiment, eight bolt connection pairs 31 (only the bolts 311 of the eight bolt connection pairs are visible in the figure) are distributed circumferentially on the radial outer side of the sealing gasket 50. The outer edge of the sealing gasket 50 is tangent to the bolts 311 of the eight bolt connection pairs 31. This facilitates the positioning of the sealing gasket 50 during assembly.
[0038] like Figure 3 As shown, in the exemplary embodiment, a gap X2 is radially provided between the sealing flange T and the sealing portion 122. Thus, during the assembly process, the protruding portion of the sealing portion 122 due to the extrusion deformation with the second sealing ring 52 can enter the gap, thereby avoiding unnecessary stress, thereby facilitating improving the stability of the structure.
[0039] like Figure 2 As shown, in the exemplary embodiment, the radially outer portions of the two connected flanges 113 are spaced axially to form a gap X3. In this way, the clamping force of the clamping and fixing assembly 30 on the two flanges 113 can produce a lever effect at the sealing flange T, which is beneficial to improving the sealing performance between the first sealing ring 51 and the sealing flange T.
[0040] like Figure 3As shown, in the exemplary embodiment, the first sealing ring 51 includes a supporting layer C1 arranged in layers along the axial direction and two covering layers C2 covering both sides of the supporting layer C1. Both side end surfaces of the supporting layer C1 are protrudingly provided with a plurality of annular teeth extending in the circumferential direction, and the plurality of annular teeth are in the shape of concentric circles. The covering layer C2 covers the tooth surface of the annular teeth of the supporting layer C1. This helps to improve the sealing performance between the first sealing ring 51 and the sealing flange T. The material of the supporting layer C1 of the first sealing ring 51 is, for example, a metal material such as aluminum, copper, titanium, carbon steel, stainless steel (for example, 316L stainless steel), alloy steel, etc., and the material of the covering layer C2 of the first sealing ring 51 is, for example, a non-metallic sealing filling material such as rubber, polytetrafluoroethylene, flexible graphite, non-asbestos fiber, etc., but is not limited thereto.
[0041] Figure 5 for Figure 1 The cross-sectional view of the sealing gasket is shown in FIG. Figure 5 As shown, in the exemplary embodiment, the sealing gasket 50 includes an integrally formed body B. The body B is provided with a supporting layer C1 of a first sealing ring 51 and a second sealing ring 52. The outer edge of the body B is tangent to the bolts 311 of the eight bolt connection pairs 31. This facilitates processing.
[0042] In an exemplary embodiment, the thickness of the support layer C1 of the first sealing ring 51 is, for example, 3-5 mm. The thickness of the cover layer C2 of the first sealing ring 51 is, for example, 0.5-1.5 mm. The thickness of the second sealing ring 52 is, for example, 4-6 mm. The thickness of the sealing portion 122 is, for example, 10-16 mm.
[0043] Figure 6 FIG. 4 is a cross-sectional view of another exemplary embodiment of a sealing gasket. Figure 6 As shown, in other exemplary embodiments, the first sealing ring 51 of the sealing gasket 50 may also be a single-layer flat plate. The sealing gasket 50 is an integrally formed structure. This structure is simple and can reduce processing costs.
[0044] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
[0045] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present invention, such as combination, division or repetition of features, should be included in the scope of protection of the present invention.
Claims
1. A conveying pipeline, characterized in that: include: The delivery pipe (10) comprises: The outer tube (11) has a flange (113) at its end, the delivery tubes (10) are connected to each other via the flange (113), and the axial end surface of the flange (113) is protrudingly provided with an annular sealing flange (T), and An inner liner tube (12) comprising a tubular portion (121) and an annular sealing portion (122), wherein the tubular portion (121) is attached to the inner surface of the outer tube (11), and the sealing portion (122) is attached to the axial end surface of the flange (113) and is located radially inward of the sealing flange (T); A clamping and fixing assembly (30) capable of clamping and fixing the two flanges (113) in the axial direction; and A sealing gasket (50) is arranged between the two connected flanges (113) and comprises: a first sealing ring (51) which is axially opposite to the sealing flange (T), the first sealing ring (51) being sealingly clamped between the two sealing flanges (T), and A second sealing ring (52) is arranged radially inward of the first sealing ring (51) and is sealed and clamped axially between the sealing portions (122) of the two liner pipes (12).
2. The delivery pipeline according to claim 1, characterized in that: Both side end surfaces of the second sealing ring (52) are protrudingly provided with annular teeth extending in the circumferential direction, and the annular teeth of the second sealing ring (52) are sealingly embedded in the sealing portions (122) on both sides by means of extrusion deformation.
3. The delivery pipeline according to claim 1, characterized in that: The inner liner pipes (12) of the connected conveying pipes (10) are not in direct contact with each other.
4. The delivery pipeline according to claim 1, characterized in that: The clamping force of the sealing flange (T) on both sides borne by the first sealing ring (51) is greater than the clamping force of the sealing portion (122) on both sides borne by the second sealing ring (52).
5. The delivery pipeline according to claim 1, characterized in that: The clamping and fixing assembly (30) comprises a plurality of bolt connection pairs (31), wherein the bolts (311) of each of the bolt connection pairs (31) are inserted through the two connected flanges (113), and the plurality of bolt connection pairs (31) are distributed circumferentially on the radially outer side of the sealing gasket (50), and the outer edge of the sealing gasket (50) is tangent to the bolts (311) of the plurality of bolt connection pairs (31).
6. The delivery pipeline according to claim 1, characterized in that: A gap is provided between the sealing flange (T) and the sealing portion (122) in the radial direction.
7. The delivery pipeline according to claim 1, characterized in that: The two connected flanges (113) are spaced apart in the axial direction to form a gap at the radially outer sides of the sealing flange (T).
8. The delivery pipeline according to claim 1, characterized in that: The first sealing ring (51) comprises a supporting layer (C1) arranged in layers along the axial direction and a covering layer (C2) covering both sides of the supporting layer (C1), both side end surfaces of the supporting layer (C1) are protrudingly provided with annular teeth extending in the circumferential direction, and the covering layer (C2) covers the tooth surfaces of the annular teeth of the supporting layer (C1).
9. The delivery pipeline according to claim 8, characterized in that: The sealing gasket (50) comprises an integrally formed main body (B), the main body (B) being provided with the supporting layer (C1) of the first sealing ring (51) and the second sealing ring (52).
10. The delivery pipeline according to claim 8, characterized in that: The outer tube (11) is made of carbon steel, stainless steel or alloy steel. The material of the inner lining tube (12) is rubber, high molecular weight polyethylene, ultra-high molecular weight polyethylene or polyurethane. The support layer (C1) of the first sealing ring (51) is made of aluminum, copper, titanium, carbon steel, stainless steel or alloy steel. The covering layer (C2) of the first sealing ring (51) is made of rubber, polytetrafluoroethylene, flexible graphite or non-asbestos fiber, and / or The second sealing ring (52) is made of aluminum, copper, titanium, carbon steel, stainless steel or alloy steel.