A wear-resistant ceramic composite straight pipe

Abstract

This utility model discloses a wear-resistant ceramic composite straight pipe, relating to the field of pipe materials. It includes a steel pipe and flanges fixedly disposed at both ends of the steel pipe. A ceramic pipe is fixedly bonded to the inner wall of the steel pipe, and a filler layer is provided between the ceramic pipe and the steel pipe. Both flanges have annular grooves on their side walls, and a first fixing ring and a second fixing ring are respectively disposed inside the two annular grooves. Multiple evenly distributed reinforcing rods are inserted around the inner wall of the ceramic pipe, and the two ends of the reinforcing rods are respectively connected to the first fixing ring and the second fixing ring. This utility model, through the synergistic effect of multiple structures, significantly enhances the bonding strength between the ceramic layer and the metal pipe, effectively resisting the forces caused by media erosion and pipe vibration, preventing the ceramic layer from detaching, and solving the problem of weak fixation with traditional single-adhesive bonding.

Description

Technical Field

[0001] This utility model relates to the field of pipe materials, specifically to a wear-resistant ceramic composite straight pipe. Background Technology

[0002] In mining, power, chemical and other fields, pipelines that transport abrasive media such as powders and slurries need to have high wear resistance in order to extend their service life. In the existing technology, in order to improve the wear resistance of the inner wall of metal straight pipes, a solution of adding ceramic pipes to the inner wall of metal straight pipes is often adopted. The high hardness and wear resistance of ceramic materials are used to resist the wear and tear of the pipeline caused by the erosion of the media.

[0003] However, currently, ceramic pipes and metal straight pipes are mostly bonded together with adhesive, resulting in a relatively weak bonding structure. During use, the medium being transported continuously erodes the inner wall of the ceramic pipe, and the vibrations generated during pipe operation constantly act on the interface between the ceramic pipe and the metal straight pipe. This causes the adhesive layer to gradually age and fail, leading to the ceramic pipe detaching from the inner wall of the metal straight pipe. The detached ceramic pipe not only loses its wear-resistant protection for the metal straight pipe, causing rapid wear on the inner wall of the metal, but may also block the pipe and scratch the pipe wall, affecting the normal transport of the medium.

[0004] Therefore, a wear-resistant ceramic composite straight pipe is proposed. Utility Model Content

[0005] In view of the problems existing in the above-mentioned wear-resistant ceramic composite straight pipes, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a wear-resistant ceramic composite straight pipe, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A wear-resistant ceramic composite straight pipe includes a steel pipe and flanges fixedly disposed at both ends of the steel pipe. A ceramic pipe is fixedly bonded to the inner wall of the steel pipe, and a filler layer is provided between the ceramic pipe and the steel pipe.

[0009] Both flanges have annular grooves on their sidewalls, and the two annular grooves are respectively provided with a first fixing ring and a second fixing ring. The ceramic tube is surrounded by a plurality of evenly distributed reinforcing rods, and the two ends of the reinforcing rods are respectively connected to the first fixing ring and the second fixing ring.

[0010] Preferably, the ceramic tube has filling grooves on both sides of its tube wall, and the filling layer is located inside the filling grooves.

[0011] Preferably, the filler layer is a nickel-based alloy layer.

[0012] Preferably, the ceramic tube has a modified epoxy resin adhesive layer bonded to the inner wall of the steel tube on both sides and in the middle.

[0013] Furthermore, one end of the reinforcing rod is fixedly connected to the side wall of the first fixing ring, and the other end of the reinforcing rod is inserted into the second fixing ring.

[0014] Preferably, the side wall of the second fixing ring has a slot that engages with one end of the reinforcing rod.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] This invention achieves a preliminary and stable bond between the ceramic pipe and the inner wall of the steel pipe by covering the sides and middle of the ceramic pipe with a modified epoxy resin adhesive layer. A nickel-based alloy filler layer fills the filling grooves on both sides of the ceramic pipe, filling the gap between the two and buffering the thermal expansion stress. A reinforcing rod penetrates the ceramic pipe wall and is connected to the first and second fixing rings at both ends to form a ring-shaped reinforcement frame, which disperses the force brought by the scouring of the medium and the vibration of the pipeline. The synergistic effect of multiple structures greatly improves the bonding strength between the ceramic pipe and the steel pipe, effectively prevents the ceramic pipe from falling off, and solves the problem of weak bonding strength of traditional single glue. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a perspective view of the present utility model;

[0019] Figure 2 This is a perspective view of the present invention cut open;

[0020] Figure 3 This is a perspective view of the ceramic tube, the first fixing ring, and the second fixing ring in this utility model;

[0021] Figure 4 This is a perspective view of the flange in this utility model;

[0022] Figure 5 This is a perspective view of the second fixing ring in this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Steel pipe; 2. Flange; 3. Ceramic pipe; 4. Filler layer; 5. Annular groove; 6. First fixing ring; 7. Second fixing ring; 8. Reinforcing rod; 9. Filler groove; 10. Modified epoxy resin adhesive layer; 11. Slot. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] This utility model provides, for example Figure 1-5 The wear-resistant ceramic composite straight pipe shown includes a steel pipe 1 and flanges 2 fixedly disposed at both ends of the steel pipe 1. A ceramic pipe 3 is fixedly bonded to the inner wall of the steel pipe 1, and a filling layer 4 is provided between the ceramic pipe 3 and the steel pipe 1. A filling groove 9 is provided on both sides of the wall of the ceramic pipe 3, and the filling layer 4 is located inside the filling groove 9. The filling layer 4 is a nickel-based alloy layer. The high strength and good adhesion of the nickel-based alloy are used to fill the gap between the ceramic pipe 3 and the steel pipe 1, further enhancing the bonding stability between the two. A modified epoxy resin adhesive layer 10 is provided on both sides and the middle of the wall of the ceramic pipe 3, which is bonded to the inner wall of the steel pipe 1. By providing the modified epoxy resin adhesive layer 10 on both sides and the middle, the ceramic pipe 3 and the steel pipe 1 can be firmly bonded together.

[0027] Both flanges 2 have annular grooves 5 on their sidewalls, and the two annular grooves 5 are respectively provided with a first fixing ring 6 and a second fixing ring 7. Multiple evenly distributed reinforcing rods 8 are inserted around the inside of the ceramic tube 3, and the two ends of the reinforcing rods 8 are respectively connected to the first fixing ring 6 and the second fixing ring 7. One end of the reinforcing rod 8 is fixedly connected to the sidewall of the first fixing ring 6, and the other end of the reinforcing rod 8 is inserted into the second fixing ring 7. The sidewall of the second fixing ring 7 is provided with a slot 11 that is inserted into one end of the reinforcing rod 8, which allows the second fixing ring 7 to be separated from the reinforcing rod 8. The reinforcing rod 8 is made of steel.

[0028] Working principle: First, filling grooves 9 are opened on both sides of the ceramic tube 3, and modified epoxy resin adhesive layer 10 is coated on both sides and the middle of the ceramic tube 3. The ceramic tube 3 and the inner wall of the steel tube 1 are aligned and bonded to initially fix the two. Then, a nickel-based alloy filling layer 4 is filled into the filling grooves 9 on both sides of the ceramic tube 3. The high strength and good adhesion of the nickel-based alloy fill the gap between the ceramic tube 3 and the steel tube 1, further enhancing the bonding stability. At the same time, the temperature change resistance of the nickel-based alloy can buffer the stress caused by the difference in thermal expansion coefficients between ceramic and metal, and avoid cracking at the bonding interface.

[0029] Next, the first fixing ring 6 and the second fixing ring 7 are respectively embedded into the annular grooves 5 of the flanges 2 at both ends of the steel pipe 1. Then, multiple evenly distributed reinforcing rods 8 are inserted around the inside of the ceramic pipe 3, so that the other end of the reinforcing rod 8 is inserted into the slot 11 on the side wall of the second fixing ring 7, forming an "annular reinforcement frame" that runs through the ceramic pipe 3. This frame can transfer the force at both ends of the ceramic pipe 3 to the flange 2, disperse the force of the medium scouring and pipeline vibration on the interface between the ceramic pipe 3 and the steel pipe 1, and prevent the ceramic pipe 3 from falling off due to excessive local stress. At the same time, when the adjacent steel pipe 1 is fixed by the flange 2, the first fixing ring 6 and the second fixing ring 7 can be fixed.

[0030] In actual media transportation, the ceramic tube 3 comes into direct contact with abrasive media such as powders and slurries. Its high hardness helps resist erosion and protects the inner wall of the steel pipe 1 from damage. The multiple fixing structure consisting of the filling layer 4, the modified epoxy resin adhesive layer 10, the reinforcing rod 8, the first fixing ring 6, and the second fixing ring 7 works together to resist the erosion force of the media and the vibration of the pipeline, preventing the ceramic tube 3 from separating from the steel pipe 1 and ensuring the long-term stable operation of the pipeline. At the same time, the flanges 2 at both ends can facilitate the splicing of this straight pipe with other pipelines, making it suitable for various transportation systems.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A wear-resistant ceramic composite straight pipe, comprising a steel pipe (1) and flanges (2) fixedly disposed at both ends of the steel pipe (1), characterized in that: A ceramic tube (3) is fixedly bonded to the inner wall of the steel pipe (1), and a filling layer (4) is provided between the ceramic tube (3) and the steel pipe (1). Both flanges (2) have annular grooves (5) on their sidewalls, and the two annular grooves (5) are respectively provided with a first fixing ring (6) and a second fixing ring (7). The ceramic tube (3) is surrounded by a plurality of uniformly distributed reinforcing rods (8), and the two ends of the reinforcing rods (8) are respectively connected to the first fixing ring (6) and the second fixing ring (7).

2. The wear-resistant ceramic composite straight pipe according to claim 1, characterized in that: The ceramic tube (3) has filling grooves (9) on both sides of its tube wall, and the filling layer (4) is located inside the filling grooves (9).

3. The wear-resistant ceramic composite straight pipe according to claim 1, characterized in that: The filler layer (4) is a nickel-based alloy layer.

4. The wear-resistant ceramic composite straight pipe according to claim 1, characterized in that: The ceramic tube (3) has a modified epoxy resin adhesive layer (10) on both sides and in the middle of the tube wall, which is bonded to the inner wall of the steel tube (1).

5. The wear-resistant ceramic composite straight pipe according to claim 1, characterized in that: One end of the reinforcing rod (8) is fixedly connected to the side wall of the first fixing ring (6), and the other end of the reinforcing rod (8) is inserted into the second fixing ring (7).

6. The wear-resistant ceramic composite straight pipe according to claim 1, characterized in that: The second fixing ring (7) has a slot (11) on its side wall that is inserted into one end of the reinforcing rod (8).

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