CN218983143U

CN218983143U - Iron mold baking system for large wind power main shaft products

Info

Publication number: CN218983143U
Application number: CN202223516541.9U
Authority: CN
Inventors: 刘莹; 李慧典; 郝亮亮; 黄志伦; 张富恒; 程新红
Original assignee: Shanghai No1 Machine Tool Foundry Suzhou Co ltd
Current assignee: Shanghai No1 Machine Tool Foundry Suzhou Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-09
Anticipated expiration: 2032-12-28

Abstract

A baking system for iron molds of large wind power main shaft products comprises iron molds and a baking rack; the top surface of the die cavity of the iron die is detachably covered with a cover, and the cover is provided with an exhaust hole; the baking rack is arranged in the die cavity of the iron die; the baking rack comprises a base, an inner cylinder and an outer cylinder; the inner cylinder is sleeved in the outer cylinder; the inner cylinder is internally provided with a hollow cavity, and the top surface of the hollow cavity is closed; the side wall of the outer cylinder is provided with a ventilation slot, and the side wall of the inner cylinder is provided with an air hole; the cavity between the inner cylinder and the outer cylinder is a coal combustion space; the inner cylinder and the outer cylinder are both arranged on the base, and an air pipe penetrates into the hollow cavity from the base. The utility model can save raw materials, increase working efficiency, improve quality stability, and has simple structure and convenient operation.

Description

Iron mold baking system for large wind power main shaft products

Technical field:

the utility model belongs to casting technology, and particularly relates to an iron mold baking system for large-scale wind power main shaft products.

The background technology is as follows:

in the casting process of the iron mold, firstly, the inner wall of the cavity of the iron mold is coated with the coating (convenient for demolding), then the cavity is preheated, the temperature is increased, and the problem that the initial temperature of the cavity is too low when molten iron is poured in to influence the quality of castings is avoided.

In preheating, a common method is to use coal combustion to heat and bake in a die cavity. In order to facilitate baking, coal is generally piled on the ground, and an iron mold is reversely buckled on the coal.

The iron mold of the large wind power main shaft product is characterized in that the shaft is of an elongated shape, so that a plurality of short iron molds are sequentially butted along the axis direction, and the cavities of the short iron molds are communicated, so that the cavity of the shaft is finally obtained.

When preheating and baking each short iron mold, the cavity of the short iron mold is shortened greatly compared with the whole cavity, but the cavity of the main shaft is still large, and after coal piled at the bottom is combusted, the heat of the main shaft is difficult to bake the upper part of the cavity, and the reason is mainly that after the coal is combusted, the heat is concentrated towards the axial direction more upwards, so that the radiation effect on the inner wall of the cavity is poor.

The utility model comprises the following steps:

in order to solve the problems in the prior art, the utility model provides an iron mold baking system for large wind power main shaft products, which comprises an iron mold. The utility model also comprises a baking rack; the top surface of the die cavity of the iron die is detachably covered with a cover, and the cover is provided with an exhaust hole;

the baking rack is arranged in the die cavity of the iron die; the baking rack comprises a base, an inner cylinder and an outer cylinder;

the inner cylinder is sleeved in the outer cylinder; the inner cylinder is internally provided with a hollow cavity, and the top surface of the hollow cavity is closed; the side wall of the outer cylinder is provided with a ventilation slot, and the side wall of the inner cylinder is provided with an air hole; the cavity between the inner cylinder and the outer cylinder is a coal combustion space;

the inner cylinder and the outer cylinder are both arranged on the base, and an air pipe penetrates into the hollow cavity from the base.

In the using process, the coal burning positions are concentrated in the annular area, and the height accumulation is higher, so that the inner wall of the cavity can be covered as much as possible. At the same time, the mold cavity is covered by the cover, so that heat reciprocates in the mold cavity. And the reasonable air duct is designed, so that coal can be fully combusted, and heat is reasonably dissipated.

Further, the top surface of the hollow cavity is detachably provided with a cover plate. The covering/removing/half-masking of the cover plate effectively affects the amount of oxygen supplied to the coal.

Further, the heights of the inner cylinder and the outer cylinder correspond to the height of the die cavity of the iron die. Under this structure, the burning height is improved as much as possible, and the higher position of the cavity is fully baked.

Further, a plurality of ventilation slits are formed; the ventilation slits at the same circumference height are a group, and the ventilation slits of the same group are uniformly distributed on the circumference of the outer cylinder; the plurality of groups of ventilation slits are sequentially arranged along the axial direction of the outer cylinder;

the air holes are multiple; the air holes at the same circumference height are a group, and the same group of air holes are uniformly distributed on the circumference of the inner cylinder; the air holes are sequentially arranged along the axial direction of the inner cylinder; one group of air holes corresponds to one group of ventilation slits.

The length direction of the ventilation slit is parallel to the axis direction of the cavity.

This configuration optimizes the flow path for combustion.

Further, the inner cylinder and the outer cylinder are connected through connecting ribs. The base comprises an annular frame; the inner diameter of the annular frame is larger than the outer diameter of the outer cylinder; the lower part of the outer wall of the outer cylinder is connected with the inner wall of the annular frame through a plurality of connecting ribs. The structure can realize the baking rack simply and easily.

Further, the hollow cavity, the coal combustion space and the area surrounded by the annular frame are communicated through an air door.

The coal in the coal combustion space freely falls into the area between the inner cylinder and the annular frame, so that part of the area also becomes the combustion space, and the heat generated by the combustion of the coal is directly spread into the narrow space between the outer cylinder and the inner wall of the cavity, so that the baking effect is further improved.

The utility model has the advantages and beneficial effects that:

1. raw material saving can be achieved.

2. The work efficiency is increased.

3. The quality stability can be improved.

4. The structure is simple and convenient to operate.

Description of the drawings:

fig. 1: a schematic structure of a baking rack;

fig. 2: schematic of the use state of the iron mold baking system (axial cross section);

fig. 3: an airflow schematic diagram of the iron mold baking system;

in the figure: iron mold 1, baking frame 2, lid 3, exhaust hole 4, base 5, inner tube 6, outer tube 7, ventilation slit 8, gas pocket 9, trachea 10, apron 11, connecting rib 12, air door 13.

The specific embodiment is as follows:

the present utility model will be further described with reference to the accompanying drawings and detailed description below:

referring to fig. 1 and 2, an iron mold baking system for large wind power main shaft products comprises an iron mold 1 and a baking rack 2; the top surface of the die cavity of the iron die is detachably covered with a cover 3, and the cover is provided with an exhaust hole 4;

the baking rack is arranged in the die cavity of the iron die; the baking rack comprises a base 5, an inner cylinder 6 and an outer cylinder 7;

the inner cylinder is sleeved in the outer cylinder; the inner cylinder is internally provided with a hollow cavity, and the top surface of the hollow cavity is closed; the side wall of the outer cylinder is provided with a ventilation slit 8, and the side wall of the inner cylinder is provided with an air hole 9; the cavity between the inner and outer cylinders is a coal combustion space (indicated by a rectangular frame in fig. 3);

both the inner and outer cylinders are mounted on the base, and an air tube 10 penetrates the hollow cavity from the base.

The top surface of the hollow cavity is detachably provided with a cover plate 11.

The heights of the inner cylinder and the outer cylinder correspond to the height of the die cavity of the iron die.

The ventilation slits are multiple; the ventilation slits at the same circumference height are a group, and the ventilation slits of the same group are uniformly distributed on the circumference of the outer cylinder; the plurality of groups of ventilation slits are sequentially arranged along the axial direction of the outer cylinder;

the air holes are multiple; the air holes at the same circumference height are a group, and the same group of air holes are uniformly distributed on the circumference of the inner cylinder; the air holes are sequentially arranged along the axial direction of the inner cylinder; one group of air holes corresponds to one group of ventilation slits. The length direction of the ventilation slit is parallel to the axis direction of the cavity.

The inner cylinder and the outer cylinder are connected through a connecting rib 12. The base comprises an annular frame; the inner diameter of the annular frame is larger than the outer diameter of the outer cylinder; the lower part of the outer wall of the outer cylinder is connected with the inner wall of the annular frame through a plurality of connecting ribs 12.

The hollow cavity, the coal combustion space and the area surrounded by the annular frame are communicated through an air door 13.

Claims

1. The iron mold baking system for the large wind power main shaft products comprises an iron mold and is characterized by also comprising a baking rack; the top surface of the die cavity of the iron die is detachably covered with a cover, and the cover is provided with an exhaust hole;

2. The iron mold baking system for large-scale wind power main shaft products according to claim 1, wherein the top surface of the hollow cavity is detachably provided with a cover plate.

3. The iron mold baking system for large wind power main shaft products according to claim 1, wherein the heights of the inner cylinder and the outer cylinder correspond to the height of a mold cavity of the iron mold.

4. The iron mold baking system for large wind power main shaft products according to claim 1, wherein a plurality of ventilation slits are formed; the ventilation slits at the same circumference height are a group, and the ventilation slits of the same group are uniformly distributed on the circumference of the outer cylinder; the plurality of groups of ventilation slits are sequentially arranged along the axial direction of the outer cylinder;

5. The iron mold baking system for large-scale wind power main shaft products according to claim 1, wherein the inner cylinder and the outer cylinder are connected through connecting ribs.

6. The iron mold baking system for large wind power main shaft products according to claim 1, wherein the length direction of the ventilation slits is parallel to the axis direction of the cavity.

7. The iron mold baking system for large wind power main shaft products according to claim 1, wherein said base comprises an annular frame; the inner diameter of the annular frame is larger than the outer diameter of the outer cylinder; the lower part of the outer wall of the outer cylinder is connected with the inner wall of the annular frame through a plurality of connecting ribs.

8. The iron mold baking system for large-scale wind power main shaft products according to claim 1, wherein the hollow cavity, the coal combustion space and the area surrounded by the annular frame are communicated through an air door.