Ceramic sintered alloy jacketed pipe

Abstract

The utility model relates to the technical field of alloy jacketed pipes, in particular to a ceramic sintered alloy jacketed pipe, which is characterized in that a corrosion-resistant inner pipe comprises a carbon steel pipe and alloy pipes arranged at two ends of the carbon steel pipe, and ceramic coatings are sintered on the inner wall of the carbon steel pipe and at the joints of the alloy pipes and the carbon steel pipe; the carbon steel pipe is arranged to replace an original corrosion-resistant alloy part, so that manufacturing cost is reduced, liquid flowing through the carbon steel pipe is separated from the carbon steel pipe through the ceramic coating, and the carbon steel pipe is prevented from flowing through the carbon steel pipe. And through the arrangement of the alloy pipes at the two ends of the carbon steel pipe, the ceramic coating is prevented from being exploded when the alloy pipes are welded.

Description

Technical Field

[0001] The utility model relates to the technical field of alloy jacketed pipes, in particular to a ceramic sintered alloy jacketed pipe. Background Art

[0002] Jacketed pipe usually refers to a hollow tube shell on the outside of the pipe to form a jacket structure. This design allows the medium to circulate through the space of the jacket when flowing inside the pipe, achieving heating or cooling of the medium. Jacketed pipes are commonly used in the industrial field and are used in the process of heating or cooling fluids, gases or solids. Most traditional jacketed pipes use corrosion-resistant alloys as the inner tube, and the outer layer is a jacket layer. The inner tube uses corrosion-resistant alloys, but the cost of corrosion-resistant alloys is high and it is easily corroded. Because the inner tube is wrapped by the jacket layer, it is difficult to inspect and repair the inner tube and the replacement cost is extremely high. Summary of the invention

[0003] The utility model aims to provide a ceramic sintered alloy jacketed tube to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A ceramic sintered alloy jacketed tube, comprising:

[0006] A corrosion-resistant inner tube, the corrosion-resistant inner tube comprising a carbon steel tube and alloy tubes arranged at both ends of the carbon steel tube, and a ceramic coating for preventing the carbon steel tube from being corroded is sintered on the inner wall of the carbon steel tube and at the connection between the alloy tube and the carbon steel tube;

[0007] The heat-insulating outer pipe comprises an outer pipe sleeved on the carbon steel pipe and a connecting pipe inserted on the outer pipe for steam or hot water to enter and exit the outer pipe.

[0008] Preferably, the alloy tube is made of corrosion-resistant metal.

[0009] Preferably, the corrosion-resistant metal may be 316L, 2205 duplex steel, Hastelloy, nickel, or titanium.

[0010] Preferably, the length of the ceramic coating covering the inside of the alloy tube is smaller than the length of the alloy tube, so as to prevent the ceramic coating from exploding due to heat when welding the alloy tube.

[0011] Preferably, the outer tube comprises a jacket layer sleeved on the carbon steel tube and jacket rings arranged at both ends of the jacket layer and connected to the alloy tube.

[0012] Preferably, two connecting pipes are provided on the jacket layer, so that steam or hot water enters the jacket layer from one connecting pipe and is discharged from the jacket layer from the other connecting pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model comprises a carbon steel pipe and a ceramic coating arranged on the inner wall of the carbon steel pipe. The manufacturing cost is reduced by replacing the original corrosion-resistant alloy part with the carbon steel pipe. The ceramic coating is arranged to separate the liquid flowing through the carbon steel pipe from the carbon steel pipe, thereby preventing the carbon steel pipe from being corroded by the liquid flowing inside. The alloy pipes are arranged at both ends of the carbon steel pipe, thereby preventing the ceramic coating from exploding during welding of the alloy pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the axonometric structure of the utility model.

[0017] In the figure: 1. Carbon steel pipe; 2. Alloy pipe; 3. Ceramic coating; 4. Jacket layer; 5. Jacket ring; 6. Connecting pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1 to Figure 2 , the utility model provides a technical solution:

[0020] A ceramic sintered alloy jacketed tube, comprising:

[0021] The corrosion-resistant inner tube comprises a carbon steel tube 1, an alloy tube 2 and a ceramic coating 3. The alloy tube 2 is arranged at the end of the carbon steel tube 1. The alloy tube 2 is fixedly connected to the end of the carbon steel tube 1 by welding or the like. Two alloy tubes 2 are arranged, which are arranged at both ends of the carbon steel tube 1 respectively. The material of the alloy tube 2 can be selected from one of the corrosion-resistant metal materials such as 316L, 2205 duplex steel, Hastelloy, nickel, titanium, etc. The alloy tube 2 can be welded, cut and other installation operations during the installation of the ceramic sintered alloy jacket tube. The ceramic coating 3 is arranged on the inner wall of the carbon steel tube 1 and at the connection between the alloy tube 2 and the carbon steel tube 1 to prevent corrosion. The carbon steel pipe 1 is corroded by hydrochloric acid, sulfuric acid, nitric acid, sodium bicarbonate, caustic soda and other corrosive media. After the carbon steel pipe 1 and the alloy pipe 2 are welded and qualified by flaw detection, powder is added and sintered to make the ceramic coating 3 completely cover the carbon steel pipe 1 and the welding place of the carbon steel pipe 1 and the alloy pipe 2 to eliminate the risk of corrosion. A gap is left between the end of the ceramic coating 3 and the end of the alloy pipe 2 that is not connected to the carbon steel pipe 1, because the welding and installation of the alloy end will affect the ceramic coating 3. Leaving a gap will place the ceramic coating 3 outside the welding heat affected zone, and the ceramic coating 3 will not be heated during the welding of the end of the alloy pipe 2 that is not connected to the carbon steel pipe 1, causing porcelain explosion.

[0022] An insulating outer tube, the insulating outer tube comprises an outer tube and a connecting tube 6, the outer tube comprises a jacket layer 4 and a jacket ring 5, the jacket ring 5 is arranged on the alloy tube 2, the jacket ring 5 is fixedly connected to the alloy tube 2 by welding or the like, the jacket layer 4 is sleeved on the carbon steel tube 1, the end of the jacket layer 4 is fixedly connected to the jacket ring 5 by welding or the like, two jacket rings 5 ​​are provided, which are respectively arranged on two alloy tubes 2 and respectively connected to the two ends of the jacket layer 4, the connecting tube 6 is inserted on the jacket layer 4, the connecting tube is fixedly connected to the jacket layer 4 by welding or the like, two connecting tubes are provided, and the connecting tubes are centrally symmetrically arranged on the side wall of the jacket layer 4, so that steam or hot water enters the jacket layer 4 from one connecting tube 6 and is discharged from the jacket layer 4 from the other connecting tube 6, thereby insulating the liquid flowing through the carbon steel tube 1.

[0023] Working principle: When in use, steam or hot water is sent into the jacket layer 4 through the joint to heat and insulate the carbon steel pipe 1, and then the liquid that needs to be heated and insulated is passed into the carbon steel pipe 1 to insulate the liquid flowing through the carbon steel pipe 1. The ceramic coating 3 protects the carbon steel pipe 1 from being corroded by the flowing liquid.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ceramic sintered alloy jacketed tube, characterized in that: include: A corrosion-resistant inner tube, the corrosion-resistant inner tube comprising a carbon steel tube and alloy tubes disposed at both ends of the carbon steel tube, a ceramic coating for preventing the carbon steel tube from being corroded is sintered on the inner wall of the carbon steel tube and at the connection between the alloy tube and the carbon steel tube; and The heat-insulating outer pipe comprises an outer pipe sleeved on the carbon steel pipe and a connecting pipe inserted on the outer pipe for steam or hot water to enter and exit the outer pipe.

2. A ceramic sintered alloy jacketed tube according to claim 1, characterized in that: The alloy tube is made of corrosion-resistant metal.

3. A ceramic sintered alloy jacketed tube according to claim 2, characterized in that: The corrosion-resistant metal can be selected from one of 316L, 2205 duplex steel, Hastelloy, nickel and titanium.

4. The ceramic sintered alloy jacketed tube according to claim 1, characterized in that: The length of the ceramic coating covering the alloy tube is less than the length of the alloy tube, so as to prevent the ceramic coating from exploding due to heat when welding the alloy tube.

5. The ceramic sintered alloy jacketed tube according to claim 1, characterized in that: The outer tube comprises a jacket layer sleeved on the carbon steel tube and jacket rings arranged at both ends of the jacket layer and connected to the alloy tube.

6. The ceramic sintered alloy jacketed tube according to claim 5, characterized in that: Two connecting pipes are arranged on the jacket layer, so that steam or hot water enters the jacket layer from one connecting pipe and is discharged from the jacket layer from the other connecting pipe.

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