High-toughness ceramic alloy composite jacketed pipe

Abstract

The utility model relates to the technical field of jacketed pipes, in particular to a high-toughness ceramic alloy composite jacketed pipe which comprises a corrosion-resistant inner pipe and a heat preservation outer pipe, the corrosion-resistant inner pipe comprises a middle pipe and alloy pipes arranged at the two ends of the middle pipe, the middle pipe comprises a carbon steel pipe and a ceramic layer arranged in the carbon steel pipe, a metal wire mesh is arranged in the ceramic layer, and the metal wire mesh is arranged in the heat preservation outer pipe. The metal wire mesh has good heat-conducting property, can improve the heat stability of a ceramic layer glaze surface during sintering, can be used for compensating thermal expansion of ceramic in a heating process and reducing internal stress especially in applications needing rapid heating or cooling, and can be used as a reinforcing agent, so that the metal wire mesh has good heat-conducting property. The bending resistance and fracture resistance of the ceramic layer are improved, the metal wire mesh is beneficial to dispersing stress, and the possibility that the ceramic layer cracks in the using process is reduced.

Description

Technical Field

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

[0002] Jacketed pipe usually refers to a hollow tube shell on the outside of the anti-corrosion 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. Traditional anti-corrosion pipes use corrosion-resistant alloy pipes, and the materials are mostly 316L, 2205 duplex steel, titanium, nickel and other precious metal materials. Its anti-corrosion effect is difficult to meet the anti-corrosion needs of customers, the corrosion time is too fast, and it is difficult to replace equipment, causing safety risks and property losses. Summary of the invention

[0003] The utility model aims to provide a high-toughness ceramic alloy composite jacket pipe 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 high-toughness ceramic alloy composite jacketed pipe, the composite jacketed pipe comprises a corrosion-resistant inner pipe and a thermal insulation outer pipe, the corrosion-resistant inner pipe comprises an intermediate pipe and an alloy pipe whose constituent material is a corrosion-resistant metal, the alloy pipes are arranged at both ends of the intermediate pipe, the thermal insulation outer pipe comprises a jacket ring connected to the alloy pipe, a jacket layer connected to the jacket ring and wrapping the intermediate pipe, and a connecting pipe arranged on the jacket layer for thermal insulation fluid to enter and exit the jacket layer, and a metal wire mesh is arranged in the intermediate pipe.

[0006] Preferably, the intermediate tube is a carbon steel tube, both ends of the carbon steel tube are respectively connected to the alloy tubes, a ceramic layer is arranged on the inner wall of the carbon steel tube, and the metal wire mesh is arranged inside the ceramic layer.

[0007] Preferably, the intermediate tube is a ceramic tube, both ends of the ceramic tube are respectively connected to the alloy tube, and the metal wire mesh is arranged inside the ceramic tube.

[0008] Preferably, the metal wire mesh is composed of metal wires with a diameter less than 1 mm.

[0009] Preferably, the metal mesh is made of nickel.

[0010] Preferably, the metal wire mesh made of nickel material is provided with multiple layers.

[0011] Preferably, the mesh number of the metal wire mesh is greater than 50 meshes.

[0012] Preferably, the metal wire mesh is made of nickel foam material, and its shape can be processed into special-shaped one-piece molding according to needs.

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

[0014] The utility model comprises a corrosion-resistant inner tube and a heat-insulating outer tube. The corrosion-resistant inner tube comprises an intermediate tube and alloy tubes arranged at both ends of the intermediate tube. The intermediate tube comprises a carbon steel tube and a ceramic layer arranged in the carbon steel tube. A metal wire mesh is arranged in the ceramic layer. The metal wire mesh itself has good thermal conductivity and can improve the thermal stability of the glaze of the ceramic layer during sintering. Especially in those applications that require rapid heating or cooling, the metal wire mesh can be used to compensate for the thermal expansion of the ceramic during the heating process and reduce internal stress. The metal wire mesh can be used as a reinforcing agent to improve the bending and fracture resistance of the ceramic layer. The metal wire mesh helps to disperse stress and reduce the possibility of cracks in the ceramic layer during use. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 for Figure 1 A schematic diagram of the structure enlargement of region A;

[0017] Figure 3 This is a schematic diagram of the axonometric structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0019] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of area B in the middle.

[0020] In the figure: 1. Metal mesh; 2. Alloy tube; 3. Intermediate tube; 31. Carbon steel tube; 32. Ceramic layer; 33. Ceramic tube; 4. Jacket layer; 5. Jacket ring; 6. Connecting tube. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figures 1 to 5 , the utility model provides a technical solution:

[0023] Embodiment 1:

[0024] A high-toughness ceramic alloy composite jacketed pipe, comprising:

[0025] The corrosion-resistant inner tube includes an intermediate tube 3 and an alloy tube 2. The intermediate tube 3 includes a carbon steel tube 31 and a ceramic layer 32. The alloy tube 2 is arranged at the end of the carbon steel tube 31. The alloy tube 2 is fixedly connected to the end of the carbon steel tube 31 by welding or the like. Two alloy tubes 2 are arranged, which are arranged at both ends of the carbon steel tube 31 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 installed in the ceramic sintered alloy jacket tube. During the welding and cutting process, the ceramic layer 32 is arranged on the inner wall of the carbon steel pipe 31 and the connection between the alloy pipe 2 and the inner wall of the carbon steel pipe 31 to prevent the corrosive media such as hydrochloric acid, sulfuric acid, nitric acid, sodium bicarbonate, caustic soda, etc. from corroding the carbon steel pipe 31 when flowing through the carbon steel pipe 31. A gap is left between the end of the ceramic layer 32 and the end of the alloy pipe 2 that is not connected to the carbon steel pipe 31, because the end welding installation of the alloy pipe 2 will affect the ceramic layer 32, and leaving a gap will make the ceramic layer 32 outside the welding heat affected zone. The ceramic layer 32 will not be heated and cracked due to the welding of the end of the alloy tube 2 not connected to the carbon steel tube 31. A metal mesh 1 is arranged in the ceramic layer 32. The metal mesh 1 can be arranged in 2-3 layers according to the needs. The metal mesh 1 is made of nickel wire or other metal filaments with a thickness of less than 1mm. The mesh number of the metal mesh 1 is greater than 50 meshes. The metal mesh 1 can also be made of foam nickel. The metal mesh 1 of foam nickel is manufactured by special-shaped molding and is placed in the carbon steel tube 31 and the alloy tube 2. When the ceramic layer 32 and the metal wire mesh 1 are set on the wall, first, the rust is removed at the connection between the inner wall of the carbon steel tube 31 and the alloy tube 2 and the inner wall of the carbon steel tube 31, and then glaze powder is added and sintered into a bottom glaze layer. The nickel mesh or other metal wire mesh 1 is welded on the surface of the bottom glaze layer by covering, spot welding, or brazing. On the upper layer of the metal wire mesh 1, a surface glaze layer is sintered by adding glaze powder. The surface glaze layer covers all the metal wires and the connection between the carbon steel tube 31 and the inner wall of the alloy tube 2. The method of adding the metal wire mesh 1 can reduce the risk of ceramic layer 32 bursting.

[0026] The insulating outer tube includes a connecting tube 6, a jacket layer 4 and a jacket ring 5. The jacket ring 5 is arranged on the alloy tube 2, and 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 31, and 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, and the connecting tube 6 is fixedly connected to the jacket layer 4 by welding or the like. There are two connecting tubes 6, and the connecting tubes 6 are centrally symmetrically arranged on the side wall of the jacket layer 4, so that the cold or hot insulating fluid enters the jacket layer 4 from one connecting tube 6 and is discharged from the jacket layer 4 from the other connecting tube 6, so as to insulate the liquid flowing through the carbon steel tube 31.

[0027] Embodiment 2: The only difference from Embodiment 1 is that the intermediate tube 3 includes a ceramic tube 33 and a metal mesh 1, the alloy tube 2 is connected to both ends of the ceramic tube 33, the ceramic tube 33 and the alloy tubes 2 at both ends are fixedly connected, the metal mesh 1 is arranged in the ceramic tube 33, so that the metal mesh 1 is wrapped by the ceramic tube 33, and the metal mesh 1 is fixedly connected to the alloy tubes 2 at both ends. Compared with Embodiment 1, the use of the carbon steel tube 31 is avoided, materials are saved, costs are reduced, and corrosion resistance is further improved. The metal mesh 1 composed of metal nickel material in the ceramic tube 33 can be arranged in 2-3 layers to increase the structural strength. The metal mesh 1 can also be formed by foam nickel.

[0028] Working principle: When in use, the cold or hot insulation fluid is sent into the jacket layer 4 through the connecting pipe 6 to insulate the carbon steel pipe 31 or the ceramic pipe 33, and then the liquid that needs to be insulated is passed into the carbon steel pipe 31 or the ceramic pipe 33 to insulate the liquid flowing through the carbon steel pipe 31 or the ceramic pipe 33. The ceramic layer 32 protects the carbon steel pipe 31 from being corroded by the flowing liquid. The setting of the metal wire mesh 1 enhances the strength and safety when facing cold and hot shocks and physical shocks, and reduces the probability of porcelain explosion.

[0029] 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 high-toughness ceramic alloy composite jacketed pipe, the composite jacketed pipe comprising a corrosion-resistant inner pipe and a heat-insulating outer pipe, the corrosion-resistant inner pipe comprising an intermediate pipe and an alloy pipe whose constituent material is a corrosion-resistant metal, the alloy pipe being arranged at both ends of the intermediate pipe, the heat-insulating outer pipe comprising a jacket ring connected to the alloy pipe, a jacket layer connected to the jacket ring and wrapping the intermediate pipe, and a connecting pipe arranged on the jacket layer for heat-insulating fluid to enter and exit the jacket layer, characterized in that: A metal wire mesh is arranged in the intermediate tube.

2. The high-toughness ceramic alloy composite jacket pipe according to claim 1, characterized in that: The intermediate tube is a carbon steel tube, both ends of which are connected to the alloy tubes respectively, a ceramic layer is arranged on the inner side wall of the carbon steel tube, and the metal wire mesh is arranged inside the ceramic layer.

3. The high-toughness ceramic alloy composite jacket pipe according to claim 2, characterized in that: The middle tube is a ceramic tube, both ends of the ceramic tube are connected to the alloy tubes respectively, and the metal wire mesh is arranged inside the ceramic tube.

4. A high-toughness ceramic alloy composite jacket pipe according to claim 2 or 3, characterized in that: The metal wire mesh is composed of metal wires with a diameter less than 1 mm.

5. A high-toughness ceramic alloy composite jacket pipe according to claim 2 or 3, characterized in that: The material of the metal wire mesh is nickel.

6. A high-toughness ceramic alloy composite jacket pipe according to claim 2 or 3, characterized in that: The metal wire mesh made of nickel material is provided with multiple layers.

7. A high-toughness ceramic alloy composite jacket pipe according to claim 2 or 3, characterized in that: The mesh number of the metal wire mesh is greater than 50 meshes.

8. A high-toughness ceramic alloy composite jacket pipe according to claim 2 or 3, characterized in that: The metal wire mesh is made of nickel foam material, and its shape can be processed into special-shaped one-piece molding according to needs.

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