CN216966232U

CN216966232U - Carbon dioxide gas protection system for centrifugal casting

Info

Publication number: CN216966232U
Application number: CN202123060404.4U
Authority: CN
Inventors: 赵剑波; 孙平; 王暖棚
Original assignee: Qingdao Huakun Wear Resistant Steel Co ltd
Current assignee: Qingdao Huakun Wear Resistant Steel Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-07-15
Anticipated expiration: 2031-12-08

Abstract

The utility model discloses a carbon dioxide gas protection system for centrifugal casting, and relates to the technical field of centrifugal casting. The carbon dioxide gas protection system for centrifugal casting comprises: the casting mold inner cavity protection system comprises a carbon dioxide gas storage bottle and a nozzle connected with the carbon dioxide gas storage bottle through a gas conveying pipe I; the nozzle is inserted into a pouring gate of the casting mold; the casting ladle protection system comprises a blowing device arranged above a casting ladle, and the blowing device is connected with a carbon dioxide gas storage bottle through a gas conveying pipe II. The utility model has simple structural design, protects the casting molten metal in the whole process, including the transferring process, the pouring process and the cooling process, and avoids the oxidation of the molten metal as much as possible; the whole-course protection is carried out on the casting metal liquid by adopting the low-cost carbon dioxide gas, the oxidation and the nitridation of the metal liquid are avoided, the casting defect is reduced, and the production quality and the benefit are improved.

Description

Carbon dioxide gas protection system for centrifugal casting

Technical Field

The utility model relates to the technical field of centrifugal casting, in particular to a carbon dioxide gas protection system for centrifugal casting.

Background

Centrifugal casting is a common technology for preparing sleeve parts, and particularly, in large-scale roller and bushing parts, the centrifugal casting is mainly used for production so as to ensure the compactness of surface materials and the quality of products.

At present, in the centrifugal casting, secondary oxidation of molten metal occurs during pouring from a steel ladle, a tundish and crystallization, and secondary oxide inclusion of the molten metal is harmful, so that a series of quality problems of a centrifugal casting product can be caused, and the quality of the product is influenced.

How to solve the technical problems is a technical problem to be solved in the technical field of centrifugal casting at present.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, embodiments of the present invention provide a carbon dioxide gas protecting system for centrifugal casting to solve the problems in the background art.

The utility model provides the following technical scheme: a carbon dioxide gas shield system for centrifugal casting, comprising:

the casting mold inner cavity protection system comprises a carbon dioxide gas storage bottle and a nozzle connected with the carbon dioxide gas storage bottle through a gas transmission pipe I; the nozzle is inserted and connected to a pouring gate of the casting mold;

the casting ladle protection system comprises a blowing device arranged above a casting ladle, and the blowing device is connected with a carbon dioxide gas storage bottle through a gas conveying pipe II.

Preferably, the air blowing device comprises a copper pipe and a shower head connected with the copper pipe.

Preferably, the copper pipe is fixed on a support for hanging the casting ladle, and one end of the copper pipe is connected with the gas conveying pipe II.

Preferably, the gas transmission pipe I comprises a hose I, a gas pipe and a hose II which are sequentially connected in series; the hose I and the hose II are respectively connected with a carbon dioxide gas storage bottle and a nozzle, and the gas pipe is fixed on the centrifugal casting machine through a fixing frame.

Preferably, the gas outlet of the carbon dioxide gas storage cylinder is connected with a pressure reducing valve, and the gas conveying pipe I and the gas conveying pipe II are respectively provided with a control valve.

Preferably, the nozzle is mounted on a support frame, and the support frame is fixed on the launder through a support plate.

The carbon dioxide gas protection system for centrifugal casting provided by the embodiment of the utility model has the following beneficial effects:

1. the utility model has simple structural design, protects the casting molten metal in the whole process, including the transferring process, the pouring process and the cooling process, and avoids the oxidation of the molten metal as much as possible;

2. the carbon dioxide gas with low cost is adopted to carry out the whole-process protection on the casting metal liquid, thereby avoiding the oxidation and the nitridation of the metal liquid, reducing the casting defects and improving the production quality and the benefit;

3. the carbon dioxide is used as gas protection in the centrifugal casting process, and has important significance on the promotion and upgrading of the ecological casting.

Drawings

FIG. 1 is a schematic view of the structure of the present invention (the air pipe II is not shown in the figure);

FIG. 2 is a schematic structural view of a portion of the structure of the present invention;

FIG. 3 is a schematic view showing the structure of the blowing device of the present invention connected to a ladle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.

The research aiming at the technical problems mentioned in the background art discovers that the secondary oxidation of the molten metal in the centrifugal casting is mainly characterized in that a gas protection measure is not used in the pouring process, and the high-temperature molten metal reacts with the oxidation in the air due to the lack of gas protection, so that the defects of oxide formation, inclusion, shrinkage porosity and the like are generated.

Carbon dioxide gas is an important protective gas, and can not only isolate high-temperature metal from air and prevent the air from nitriding and oxidizing the high-temperature metal; meanwhile, under the action of high temperature, carbon dioxide gas can be decomposed into carbon monoxide, so that protective gas is increased, and the protective effect on high-temperature metal liquid is increased; and the carbon dioxide is used as the gas protection of the centrifugal casting process, which has important significance on the promotion and upgrading of the ecological casting.

The embodiment of the utility model provides a carbon dioxide gas protection system for centrifugal casting, which solves the technical problems and adopts the following technical scheme (see fig. 1-3):

a carbon dioxide gas shield system for centrifugal casting, comprising:

the casting mold inner cavity protection system comprises a carbon dioxide gas storage bottle 1 and a nozzle 10 connected with the carbon dioxide gas storage bottle 1 through a gas transmission pipe I; the nozzle 10 is inserted on the pouring gate of the casting mould 9; carbon dioxide enters the inner cavity of the casting mold 9 from the pouring port to remove air, so that the inner cavity of the casting mold 9 is filled with carbon dioxide gas, and gas protection is performed in the centrifugal casting process.

The casting ladle protection system comprises an air blowing device 14 arranged above a casting ladle, and the air blowing device 14 is connected with the carbon dioxide gas storage bottle 1 through a gas transmission pipe II; the carbon dioxide is covered on the surface of the molten metal through the air blowing device 14, air is isolated, and gas protection is performed during the casting process of the molten metal.

It should be noted that the gas conveying pipe I and the gas conveying pipe II can be connected with the gas outlet of the carbon dioxide gas storage cylinder 1 through a three-way valve.

Preferably, the air blowing device 14 comprises a copper tube 14a and a shower head 14b connected with the copper tube 14 a; the copper pipe 14a is connected with the carbon dioxide gas storage bottle 1 through a gas pipe II, the surface of the bottom of the shower head 14b is provided with a plurality of small holes, and carbon dioxide uniformly covers the upper part of the casting ladle through the small holes, so that the cooling and impact effects of gas pressure on the surface of the liquid are reduced.

Preferably, the copper pipe 14a is fixed on a bracket 15 for hanging the casting ladle 16, and one end of the copper pipe is connected with the air conveying pipe II.

Preferably, the gas transmission pipe I comprises a hose I3, a gas pipe 4 and a hose II 8 which are sequentially connected in series; the hose I3 and the hose II 8 are respectively connected with a carbon dioxide gas storage bottle 1 and a nozzle 10, and the gas pipe 4 is fixed on a centrifugal casting machine 17 through a fixing frame 5; in this embodiment, the joints of the hoses I3 and II 8 and the air pipe 4 are provided with the adapter 7.

Preferably, the gas outlet of the carbon dioxide gas storage cylinder 1 is connected with a pressure reducing valve 2, and the gas conveying pipe I and the gas conveying pipe II are respectively provided with a control valve 6.

The total flow of carbon dioxide delivery can be adjusted by arranging the pressure reducing valve 2; the gas conveying pipe I is provided with the control valve 6 for controlling the gas amount entering the casting mold 9 and adjusting the gas pressure inside the casting mold 9, so that the problem that the inner cavity of the casting mold 9 cannot be filled due to insufficient carbon dioxide flow and the impact caused by overlarge carbon dioxide flow are avoided; the control valve 6 is arranged on the air delivery pipe II to control the blowing amount of the carbon dioxide of the blowing device 14.

Preferably, the nozzle 10 is mounted on a support frame 11, and the support frame 11 is fixed on a runner 13 through a support plate 12; the nozzle 10 may be fixed to the outside of the centrifugal casting machine 17, and the main purpose is to fix the nozzle 10 so as not to move.

The utility model relates to a working method of a carbon dioxide gas protection system for centrifugal casting, which comprises the following steps:

1. before the centrifugal casting process, the launder trolley is moved to the front of the casting mold 9 and is aligned to the position of a pouring gate of the casting mold 9;

2. before centrifugal casting pouring, a control valve 6 is opened, and carbon dioxide in a carbon dioxide gas storage bottle 1 respectively enters a gas conveying pipe I and a gas conveying pipe II through a pressure reducing valve 2;

the carbon dioxide entering the gas transmission pipe I enters the inner cavity of the casting mold 9 from the pouring gate to remove air, so that the inner cavity of the casting mold 9 is filled with carbon dioxide gas, and gas protection is performed in the centrifugal casting process;

and the carbon dioxide entering the gas conveying pipe II is sprayed out from the small holes on the bottom surface of the shower head 14b, uniformly covers the upper part of the casting ladle 16, isolates air, and carries out gas protection in the metal liquid casting process.

The carbon dioxide gas protection system for centrifugal casting provided by the embodiment of the utility model has the following effects: the utility model has simple structural design, protects the casting molten metal in the whole process, including the transferring process, the pouring process and the cooling process, and avoids the oxidation of the molten metal as much as possible; the carbon dioxide gas with low cost is adopted to carry out the whole-process protection on the casting metal liquid, thereby avoiding the oxidation and the nitridation of the metal liquid, reducing the casting defects and improving the production quality and the benefit; the carbon dioxide is used as gas protection in the centrifugal casting process, and has important significance on the promotion and the upgrading of the ecological casting.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, for example, as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate agent, and may be used for communicating the inside of two elements or interacting relation of two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present invention can be understood by those skilled in the art according to specific situations.

It should be understood that equivalents and modifications to the disclosed embodiments and concepts may occur to one skilled in the art, and all such modifications and alterations are intended to fall within the scope of the appended claims.

Claims

1. A carbon dioxide gas shield system for centrifugal casting, comprising:

the casting mold inner cavity protection system comprises a carbon dioxide gas storage bottle and a nozzle connected with the carbon dioxide gas storage bottle through a gas transmission pipe I; the nozzle is inserted into a pouring gate of the casting mold;

2. The carbon dioxide gas shield system for centrifugal casting of claim 1, wherein the gas blowing device comprises a copper tube and a shower head connected to the copper tube.

3. The carbon dioxide gas protection system for centrifugal casting as claimed in claim 2, wherein the copper tube is fixed on a bracket for hanging a casting ladle, and one end of the copper tube is connected with a gas delivery pipe II.

4. The carbon dioxide gas protection system for centrifugal casting as claimed in claim 1, wherein the gas delivery pipe I comprises a hose I, a gas pipe and a hose II which are connected in series in sequence; the hose I and the hose II are respectively connected with a carbon dioxide gas storage bottle and a nozzle, and the gas pipe is fixed on the centrifugal casting machine through a fixing frame.

5. The carbon dioxide gas protection system for centrifugal casting as claimed in claim 1, wherein a pressure reducing valve is connected to an air outlet of the carbon dioxide gas storage cylinder, and control valves are respectively arranged on the air delivery pipe I and the air delivery pipe II.

6. A carbon dioxide gas shield system for centrifugal casting according to claim 1, wherein the nozzle is mounted on a support frame, the support frame being secured to the launder by a support plate.