Composite metal launder structure for centrifugal casting machine

Abstract

The utility model discloses a composite metal launder structure for a centrifugal casting machine, which comprises a launder main body, a first U-shaped groove and a second U-shaped groove are respectively arranged on the upper surface and the lower surface of the launder main body, a protective coating is arranged on the inner wall of the first U-shaped groove, one end of the launder main body is connected with a bent launder, the other end of the launder main body is connected with a flange, and the launder main body is connected with the flange. A pipe mold powder pipe is embedded in the lower surface of the launder body, the pipe mold powder pipe is located in the second U-shaped groove and can be stably connected with a falling groove through a flange, it is guaranteed that a metal solution smoothly passes through the launder body, launder residues are poured out, a protective coating in the launder body can replace launder slurry, manual operation in the high-temperature environment is avoided, and the working efficiency is improved. The labor intensity of workers in the severe working condition environment is reduced, powder spraying and casting operation are carried out at the same time through the pipe die powder pipe and the powder feeding opening, and the production efficiency of cast pipes can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal casting, in particular to a composite metal flow channel structure for a centrifugal casting machine. Background Art

[0002] When ductile iron pipes are cast and formed using a water-cooled centrifuge, key components such as the runner and pipe mold are subjected to thermal corrosion, thermal shock and scouring from high-temperature molten iron (1350℃-1450℃) during the casting process, and the working conditions are extremely harsh. The surface state of the runner is an important condition to ensure the normal casting and molding of molten iron. The existing technology is to reduce the degree of thermal corrosion of the runner wall by manually applying runner paint, thereby improving the stability of the metal solution when passing through the runner. However, the working environment for applying paint is harsh, and workers are in special high-temperature jobs. Therefore, the development of a new type of high-temperature and wear-resistant runner is conducive to reducing the labor intensity of workers in harsh working conditions and reducing production costs.

[0003] Pipe mold powder is an important additive for producing ductile iron pipes. It has many functions, such as protecting pipe molds, facilitating demoulding, effectively reducing supercooling, inhibiting the formation of carbides, inoculating, eliminating pores and pinholes on the outer surface of cast pipes, spheroidizing, and extending the service life of pipe mold powder. Nowadays, the powder feeding system is mostly separated from the casting system, which is not conducive to improving production efficiency. Therefore, upgrading the technical level of the core equipment of centrifugal casting of ductile iron pipes is of great significance to improving the ductile iron pipe industry. Utility Model Content

[0004] The utility model aims to provide a composite metal flow channel structure for a centrifugal casting machine to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the utility model provides the following technical solutions: A composite metal flow channel structure for a centrifugal casting machine, comprising a flow channel body, wherein the upper and lower surfaces of the flow channel body are respectively provided with a first U-shaped groove and a second U-shaped groove, and the inner wall of the first U-shaped groove is provided with a protective coating;

[0006] The first U-shaped groove is a large U-shaped groove, and the second U-shaped groove is a small U-shaped groove. The large U-shaped groove is used to guide the metal solution.

[0007] One end of the flow channel body is connected to a curved flow channel, and the curved flow channel structure can buffer the metal solution to ensure the stability of casting, and the other end of the flow channel body is connected to a flange;

[0008] A tube mold powder tube is embedded in the lower surface of the flow channel body, and the tube mold powder tube is located inside the second U-shaped groove. The tube mold powder tube is integrated with the flow channel body, which is conducive to improving production efficiency.

[0009] Furthermore, the angle between the center axis of the flow channel body and the curved flow channel is 5-60 degrees, which is conducive to buffering the metal solution, reducing the splashing of the metal solution, improving the safety of production, and improving the transportation quality of the gold metal solution to the tube mold wall, thereby improving the casting quality.

[0010] Furthermore, the protective coating is a thermal spray composite coating containing 50-75% Ni-based, and the thickness of the protective coating is 200-800 microns, which can protect the flow channel body and improve the stability of the metal solution when passing through the flow channel.

[0011] Furthermore, a powder delivery port is provided at one end of the tube mold powder tube close to the curved flow channel, and powder spraying and casting are performed simultaneously, thereby improving the production efficiency of cast tubes.

[0012] Furthermore, a tube mold powder cover is provided at the tube mold powder tube port, and the tube mold powder cover is connected to the flow channel body to prevent the tube mold powder from leaking.

[0013] Furthermore, the first U-shaped groove and the second U-shaped groove are axially symmetrically arranged to improve the structural strength of the flow channel body.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) The flange can be stably connected to the chute to ensure the smooth passage of the metal solution and the dumping of the chute residue.

[0016] (2) The protective coating inside the flow channel body can replace the flow channel slurry, avoiding manual work in a high temperature environment and reducing the labor intensity of workers in harsh working conditions.

[0017] (3) The powder spraying and casting operations can be carried out simultaneously through the tube mold powder pipe and powder delivery port, which can effectively improve the production efficiency of the cast tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the flow channel main body of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the connection between the flow channel main body and the curved flow channel of the utility model;

[0020] Figure 3 This is a structural schematic diagram of the connection between the flow channel main body and the tube mold powder tube of the utility model;

[0021] Figure 4 This is a front view of the connection between the flange and the flow channel body of the utility model.

[0022] In the figure: 1. flange; 2. flow channel body; 3. tube mold powder tube; 11. plate rib; 21. protective coating; 22. curved flow channel; 23. second U-shaped groove; 31. powder delivery port; 32. tube mold powder cover. DETAILED DESCRIPTION

[0023] 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.

[0024] Example:

[0025] See also Figure 1-4 The utility model provides a technical solution: a composite metal flow channel structure for a centrifugal casting machine, comprising a flow channel body 2, wherein the upper and lower surfaces of the flow channel body 2 are respectively provided with a first U-shaped groove and a second U-shaped groove 23, and the inner wall of the first U-shaped groove is provided with a protective coating 21, and the protective coating 21 has the advantages of high temperature resistance and wear resistance, so that the flow channel body 2 has the characteristics of high temperature resistance and wear resistance, effectively reducing the degree of thermal oxidation, thermal corrosion and thermal scouring of the flow channel body 2, and extending the service life of the flow channel body 2;

[0026] One end of the flow channel body 2 is connected to a curved flow channel 22, and the other end of the flow channel body 2 is connected to a flange 1. The flange 1 has a bolt hole at each of the four corners, and bolts are used to facilitate connection with the trough flipping system;

[0027] A tube mold powder tube 3 is embedded in the lower surface of the flow channel body 2. The tube mold powder tube 3 is located inside the second U-shaped groove 23. The tube mold powder tube 3 is punched near the bottom of the curved flow channel 22 so that it can be sprayed out.

[0028] In this embodiment, if Figure 2 As shown, the angle between the central axis of the flow channel main body 2 and the curved flow channel 22 is 5-60 degrees, which can be adjusted by the state of the metal solution, the size of the tube mold and the parameters of the production equipment, which is beneficial to buffer the metal solution, reduce the splashing of the metal solution, improve the safety level of production, and improve the transportation quality of the metal solution to the tube mold wall, thereby improving the casting quality.

[0029] In this embodiment, the protective coating 21 is a thermal spray composite coating containing 50-75% Ni (nickel) base, and the thickness of the protective coating 21 is 200-800 microns. The protective coating 21 can replace the original graphite slurry, and there is no need for manual repeated brushing during production intervals, so continuous production can be achieved and manual operations in harsh environments can be reduced.

[0030] In this embodiment, if Figure 3As shown, a powder delivery port 31 is provided at one end of the tube mold powder tube 3 close to the curved flow channel 22. The tube mold powder enters the tube mold powder tube 3 and is sprayed out through the powder delivery port 31, so that powder spraying and casting can be carried out simultaneously, thereby improving the production efficiency of cast tubes.

[0031] In this embodiment, if Figure 3 As shown, a tube mold powder cover 32 is provided at the port of the tube mold powder tube 3, and the tube mold powder cover 32 is connected to the flow channel body 2. The tube mold powder cover 32 can well prevent the tube mold powder from leaking and can fix the tube mold powder tube 3.

[0032] In this embodiment, if Figure 4 As shown, the first U-shaped groove and the second U-shaped groove 23 are arranged axially symmetrically, which is beneficial to improving the deformation resistance of the flow channel structure.

[0033] In this embodiment, if Figure 1 As shown, a plate rib 11 is fixedly connected between the flow channel body 2 and the flange 1. The plate rib 11 is used to strengthen the connection between the flow channel body 2 and the flange 1. Its structure is beneficial to improving the strength of the flow channel body 2 and improving the stability of the flow channel when it is flipped and dumping residues.

[0034] Specifically, when in use, the molten metal flows into the flow channel body 2, the tube mold powder is fed into the tube mold powder tube 3, the molten metal flows along the flow channel body 2 to the curved flow channel 22, the curved flow channel 22 has a slow flow effect on the molten metal, and the tube mold powder touches it through the powder feeding port 31. During the production of cast pipes, powder spraying and casting are carried out simultaneously, and the production efficiency of cast pipes can be effectively improved.

[0035] 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 composite metal flow channel structure for a centrifugal casting machine, characterized in that: It comprises a flow channel body (2), wherein the upper and lower surfaces of the flow channel body (2) are respectively provided with a first U-shaped groove and a second U-shaped groove (23), and the inner wall of the first U-shaped groove is provided with a protective coating (21); One end of the flow channel body (2) is connected to a curved flow channel (22), and the other end of the flow channel body (2) is connected to a flange (1); A tube mold powder tube (3) is embedded in the lower surface of the flow channel body (2), and the tube mold powder tube (3) is located inside the second U-shaped groove (23).

2. The composite metal runner structure for a centrifugal casting machine according to claim 1, characterized in that: The included angle between the center axis of the flow channel main body (2) and the curved flow channel (22) is 5-60 degrees.

3. The composite metal runner structure for a centrifugal casting machine according to claim 1, characterized in that: The protective coating (21) is a Ni-based thermal spray composite coating, and the thickness of the protective coating (21) is 200-800 microns.

4. The composite metal runner structure for a centrifugal casting machine according to claim 1, characterized in that: The tube mold powder tube (3) is provided with a powder delivery port (31) at one end close to the curved flow channel (22).

5. The composite metal runner structure for a centrifugal casting machine according to claim 1, characterized in that: A tube mold powder cover (32) is provided at the end of the tube mold powder tube (3), and the tube mold powder cover (32) is connected to the flow channel body (2).

6. The composite metal runner structure for a centrifugal casting machine according to claim 1, characterized in that: The first U-shaped groove and the second U-shaped groove (23) are arranged in an axisymmetric manner.

7. The composite metal runner structure for a centrifugal casting machine according to claim 1, characterized in that: A plate rib (11) is fixedly connected between the flow channel body (2) and the flange (1).

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