A wear resistant lining structure for a corrosion resistant silicon carbide pipe

Abstract

This utility model discloses a silicon carbide corrosion-resistant and wear-resistant pipe lining structure, belonging to the technical field of pipeline technology. It includes an outer metal pipe, longitudinal ribs, rubber pads, and flat iron sheets. An inner lining fitting is installed inside the outer metal pipe, and a protective mechanism is installed on the outside of the inner lining fitting. This protective mechanism protects the inner end of the outer metal pipe, thereby reducing friction between the outer metal pipe and high-speed material transport, and thus extending the service life of the outer metal pipe. A positioning mechanism is installed at the inner end of the outer metal pipe to position the outer side of the inner lining fitting. The inner lining fitting uses multiple sets of annular ribs on its outer side to form a mechanical interlock with the longitudinal grooves, effectively resisting axial sliding between the lining and the metal pipe fitting. The grooves of the metal pipe fitting provide radial support to the silicon carbide ribs, improving the lining's resistance to internal pressure and preventing lining breakage under high pressure.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline technology, specifically to a silicon carbide corrosion-resistant and wear-resistant pipeline lining structure. Background Technology

[0002] With the rapid and large-scale development of modern science and technology, the transportation capacity of industries such as power, metallurgy, coal, petroleum, chemical, building materials, and machinery has been improved. However, the transportation media generally have characteristics such as high flow rate and large flow volume, and they continuously impact, wear, and corrode the pipe wall during the transportation process, causing the pipeline to fatigue and eventually wear through.

[0003] To address the wear problem in pipelines, a previous method involved cutting easily worn pipelines into sections, attaching wear-resistant ceramic sheets, and then welding them back together. However, the effective lifespan of the ceramic sheet adhesive is limited, and existing silicon carbide liners are generally made of smooth materials. Connecting the silicon carbide to the inner end of the metal outer pipe increases the difficulty of assembling and positioning the silicon carbide liner. Utility Model Content

[0004] The purpose of this invention is to provide a silicon carbide corrosion-resistant and wear-resistant pipe lining structure to solve the above-mentioned defects caused by the prior art.

[0005] A silicon carbide corrosion-resistant and wear-resistant pipe liner structure includes an outer metal pipe, longitudinal ribs, rubber pads, and flat iron sheets. An inner liner is installed inside the outer metal pipe, and a protective mechanism is installed on the outside of the inner liner. This protective mechanism protects the inner end of the outer metal pipe, reducing friction between the outer metal pipe and high-speed material transport, thereby extending the service life of the outer metal pipe. A positioning mechanism is installed at the inner end of the outer metal pipe, positioning the outer side of the inner liner to increase the stability of the connection between the outer metal pipe and the inner liner, preventing the contact surface between the outer metal pipe and the inner liner from being too smooth and affecting installation efficiency.

[0006] Preferably, the protective mechanism includes an inner lining tube, fastening holes, longitudinal ribs, a rubber pad, an outer groove, and an anti-slip groove. The outer side of the inner lining tube is provided with a longitudinal rib in a ring. The outer side of the longitudinal rib is provided with an outer groove. The outer side of the outer groove is provided with anti-slip grooves at equal intervals. The outer side of the outer groove is connected to a rubber pad. The outer side of the rubber pad is fitted with the inner end of an outer metal tube. The fastening holes are distributed in a ring on one side of the inner lining tube, and a nut is connected inside the fastening holes.

[0007] Preferably, the inner lining tube is connected to the outer side of the longitudinal groove by annular longitudinal ribs.

[0008] Preferably, the positioning mechanism includes a longitudinal groove, a flat iron sheet, a positioning hole, a nut, and a fastener. The longitudinal groove is distributed in a ring at the inner end of the outer metal tube. The flat iron sheet is distributed in a ring at the inner end of the outer metal tube. The positioning hole is opened through the outer side of the flat iron sheet. The fastener is set on one side of the positioning hole. The nut is distributed in a ring at both ends of the inner lining tube.

[0009] Preferably, the inner lining tube is connected to the tail end of the fastener by nuts distributed in a ring on the outer side, and the wall width of the inner lining tube is greater than the length of the flat iron sheet.

[0010] Preferably, the longitudinal rib is connected to the bottom end of the rubber pad through an outer groove on the outside, and the anti-slip grooves on the outside of the "T"-shaped rubber pad are equally spaced and fit together.

[0011] Compared with the prior art, the present invention has the following advantages: 1. The inner lining pipe fittings are mechanically interlocked by multiple sets of annular ribs on the outside and longitudinal grooves, which effectively resists axial sliding between the inner lining and the metal pipe fittings. The grooves of the metal pipe fittings provide radial support for the silicon carbide ribs, improving the inner lining's resistance to internal pressure and preventing the inner lining from cracking under high pressure. The cooperation between the ribs and grooves enables the inner lining to be quickly aligned and installed without the need for complex adhesive or sintering processes.

[0012] 2. A flat iron sheet is welded to the end of the metal pipe to form an axial baffle, which restricts the movement of the silicon carbide liner from one side. Metal nuts or threaded inserts are pre-embedded inside the silicon carbide liner and tightened from the other side by fasteners to make the liner fit tightly with the metal pipe. If the liner is partially damaged, it can be replaced by longitudinal disassembly without removing the entire metal pipe, thus reducing maintenance costs. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a schematic diagram of the overall side view structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the protective mechanism itself in this utility model.

[0016] Figure 4 This is a top view of the inner lining pipe fitting in this utility model.

[0017] Figure 5 This is a side view of the protective mechanism in this utility model.

[0018] in: 1. Outer metal tube; 2. Longitudinal groove; 3. Inner lining fitting; 4. Protective mechanism; 5. Fastening hole; 6. Longitudinal rib; 7. Rubber pad; 8. External groove; 9. Positioning mechanism; 10. Flat iron sheet; 11. Positioning hole; 12. Nut; 13. Fastener; 14. Anti-slip groove. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] like Figures 1 to 5 As shown, a silicon carbide corrosion-resistant pipe wear-resistant lining structure includes an outer metal pipe 1, longitudinal ribs 6, rubber pads 7, and flat iron sheets 10. An inner lining pipe fitting 3 is installed inside the outer metal pipe 1, and a protective mechanism 4 is installed on the outside of the inner lining pipe fitting 3. The protective mechanism 4 protects the inner end of the outer metal pipe 1, thereby reducing friction between the outer metal pipe 1 and high-speed material conveying, and thus improving the service life of the outer metal pipe 1. A positioning mechanism 9 is installed at the inner end of the outer metal pipe 1, which positions the outside of the inner lining pipe fitting 3, thereby increasing the stability of the connection between the outer metal pipe 1 and the inner lining pipe fitting 3, and preventing the contact surface between the outer metal pipe 1 and the inner lining pipe fitting 3 from being too smooth, which would affect the installation efficiency.

[0021] In this embodiment, the protective mechanism 4 includes an inner lining tube 3, fastening holes 5, longitudinal ribs 6, rubber pads 7, outer grooves 8, and anti-slip grooves 14. The outer side of the inner lining tube 3 is provided with longitudinal ribs 6 in a ring. The outer side of the longitudinal ribs 6 is provided with outer grooves 8. The outer side of the outer grooves 8 is provided with anti-slip grooves 14 at equal intervals. The outer side of the outer grooves 8 is connected to rubber pads 7. The outer side of the rubber pads 7 is fitted with the inner end of the outer metal tube 1. The fastening holes 5 are distributed in a ring on one side of the inner lining tube 3. Nuts 12 are connected inside the fastening holes 5. The ring-shaped nuts 12 are locked and installed with fasteners 13, thereby facilitating the disassembly and assembly of the inner lining tube 3 and the outer metal tube 1.

[0022] In this embodiment, the inner lining pipe 3 is connected to the outer side of the longitudinal groove 2 by the annular longitudinal rib 6. The annular longitudinal rib 6 and the longitudinal groove 2 are used to position the inner lining pipe 3, thereby improving the convenience of installation and positioning of the pipe.

[0023] In this embodiment, the positioning mechanism 9 includes a longitudinal groove 2, a flat iron sheet 10, a positioning hole 11, a nut 12, and a fastener 13. The longitudinal groove 2 is distributed in a ring at the inner end of the outer metal tube 1. The flat iron sheet 10 is distributed in a ring at the inner end of the outer metal tube 1. The positioning hole 11 is opened through the outer side of the flat iron sheet 10. The fastener 13 is set on one side of the positioning hole 11. The nut 12 is distributed in a ring at both ends of the inner lining tube 3. The flat iron sheet 10 and the positioning hole 11 are used to position one end of the silicon carbide inner lining tube 3 to prevent the silicon carbide inner lining tube 3 from shaking inside the outer metal tube 1.

[0024] In this embodiment, the inner lining tube 3 is connected to the tail end of the fastener 13 by nuts 12 distributed in an outer ring, and the width of the inner lining tube 3 is greater than the length of the flat iron sheet 10.

[0025] In this embodiment, the longitudinal rib 6 is connected to the bottom end of the rubber pad 7 through the outer groove 8 opened on the outside. The anti-slip grooves 14 opened at equal intervals on the outside of the "T"-shaped rubber pad 7 and the outer groove 8 fit together. The rubber pad 7 increases the friction of the longitudinal rib 6 during the installation process, and avoids the alignment efficiency being affected by the excessive displacement speed of the longitudinal rib 6.

[0026] In practical applications, this silicon carbide corrosion-resistant and wear-resistant pipe lining structure includes the following tasks: Step 1: Before installation, first install the rubber pad 7 into the inner end of the outer groove 8 according to the size and length of the outer metal tube 1, so that the bottom end of the rubber pad 7 fits against the top end of the anti-slip groove 14. The anti-slip groove 14 with equal spacing increases the friction of the bottom end of the rubber pad 7, so that the "T"-shaped rubber pad 7 connects with the outer side of the outer groove 8 at the top of the inner lining tube 3. At the same time, when the inner lining tube 3 and the inner end of the outer metal tube 1 fit against each other or move, the friction of the inner lining tube 3 during the displacement process is increased. Step 2: During use, the inner lining pipe 3 is aligned with the longitudinal groove 2 on the outer side of the outer metal pipe 1 through the longitudinal ribs 6 on the outer side. The cooperation between the longitudinal ribs 6 and the longitudinal groove 2 forms a mechanical interlock. The longitudinal groove 2 restricts the circumferential rotation of the silicon carbide inner lining pipe 3, preventing the inner lining pipe 3 and the outer metal pipe 1 from shaking during installation. The stress borne by the inner lining pipe 3 is distributed to the outer metal pipe 1 by the longitudinal ribs 6 and the annular longitudinal groove 2. Step 3: The operator pushes one end of the inner liner 3 to one side of the outer metal tube 1, so that the flat iron sheet 10 welded inside the outer metal tube 1 fits against one end of the silicon carbide inner liner 3. This causes the nut 12 at the inner end of the silicon carbide inner liner 3 to fit against the flat iron sheet 10. By pre-embedding the nut 12 inside the silicon carbide inner liner 3 and tightening it from the other side using fasteners 13, the inner liner 3 and the outer metal tube 1 are tightly fitted together. Step 4: Simultaneously, the longitudinally arranged rubber pad 7 is used. The elastic deformation of the rubber pad 7 can fill the tiny gap between the longitudinal rib 6 and the longitudinal groove 2 arranged in annularly at the inner end of the outer metal tube 1. The static friction force prevents the inner lining tube 3 from undergoing axial or circumferential displacement under the vibration or pressure fluctuation of the outer metal tube 1. At the same time, during thermal expansion and contraction, the elastic deformation of the rubber pad 7 can partially offset the difference in thermal expansion between the silicon carbide inner lining tube 3 and the outer metal tube 1.

[0027] Therefore, the above-disclosed embodiments are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A corrosion resistant, abrasion resistant, silicon carbide lined pipe structure, characterized by: The device includes an outer metal tube (1), longitudinal ribs (6), rubber pads (7), and flat iron sheets (10). The outer metal tube (1) is provided with an inner lining pipe (3), and the outer side of the inner lining pipe (3) is provided with a protective mechanism (4). The protective mechanism (4) protects the inner end of the outer metal tube (1), thereby reducing the friction between the outer metal tube (1) and the high-speed material conveying process, and thus improving the service life of the outer metal tube (1). The inner end of the outer metal tube (1) is provided with a positioning mechanism (9), which positions the outer side of the inner lining pipe (3) to avoid the contact surface between the outer metal tube (1) and the inner lining pipe (3) being too smooth, thus affecting the installation efficiency.

2. A corrosion resistant, wear resistant, internally lined structure for a SiC pipe according to claim 1, wherein: The protective mechanism (4) includes an inner lining tube (3), fastening holes (5), longitudinal ribs (6), rubber pads (7), outer grooves (8), and anti-slip grooves (14). The outer side of the inner lining tube (3) is provided with longitudinal ribs (6) in a ring. The outer side of the longitudinal ribs (6) is provided with outer grooves (8). The outer side of the outer grooves (8) is provided with anti-slip grooves (14) at equal intervals. The outer side of the outer grooves (8) is connected to rubber pads (7). The outer side of the rubber pads (7) is fitted with the inner end of the outer metal tube (1). The fastening holes (5) are distributed in a ring on one side of the inner lining tube (3). The inside of the fastening holes (5) is connected to nuts (12).

3. A corrosion resistant, wear resistant, internally lined structure for a SiC pipe according to claim 2, wherein: The inner lining tube (3) is connected to the outside of the longitudinal groove (2) by a ring-shaped longitudinal rib (6).

4. A corrosion resistant, wear resistant, internally lined structure for a SiC pipe according to claim 1, wherein: The positioning mechanism (9) includes a longitudinal groove (2), a flat iron piece (10), a positioning hole (11), a nut (12), and a fastener (13). The longitudinal groove (2) is distributed in a ring at the inner end of the outer metal tube (1). The flat iron piece (10) is distributed in a ring at the inner end of the outer metal tube (1). The positioning hole (11) is opened through the outer side of the flat iron piece (10). The fastener (13) is set on one side of the positioning hole (11). The nut (12) is distributed in a ring at both ends of the inner lining tube (3).

5. A corrosion resistant, wear resistant, internally lined structure for a SiC pipe according to claim 4, wherein: The inner lining tube (3) is connected to the tail end of the fastener (13) by nuts (12) distributed in an outer ring. The width of the inner lining tube (3) is greater than the length of the flat iron sheet (10).

6. A corrosion resistant, wear resistant, internally lined structure for a SiC pipe according to claim 2, wherein: The longitudinal rib (6) is connected to the bottom end of the rubber pad (7) through the outer groove (8) opened on the outside. The anti-slip groove (14) opened at equal intervals on the outside of the "T"-shaped rubber pad (7) and the outer groove (8) fit together.

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