CN220393807U

CN220393807U - Annealing furnace heating system

Info

Publication number: CN220393807U
Application number: CN202322231036.8U
Authority: CN
Inventors: 蔡宇锋; 范华强; 宋会兵; 魏鑫选; 闫英华; 冯秋生
Original assignee: Hebei Shenghao Photoelectric Technology Co ltd
Current assignee: Hebei Shenghao Photoelectric Technology Co ltd
Priority date: 2023-08-18
Filing date: 2023-08-18
Publication date: 2024-01-26
Anticipated expiration: 2033-08-18

Abstract

The utility model relates to the technical field of industrial furnaces, in particular to an annealing furnace heating system. An annealing furnace heating system comprising: the furnace body is provided with a heating cavity, and two end covers are respectively arranged at the two axial ends of the heating cavity; the first heating structure is arranged on the inner side wall of the heating cavity; and the second heating structure is arranged on the inner walls of the end covers at the two ends of the heating cavity. The utility model provides an annealing furnace heating system capable of improving the heating quality of workpieces.

Description

Annealing furnace heating system

Technical Field

The utility model relates to the technical field of industrial furnaces, in particular to an annealing furnace heating system.

Background

Vacuum annealing is a heat treatment method developed along with the advanced industries of precision machinery manufacturing, aerospace, national defense and the like, and particularly, the requirements on the performance and the precision of parts are improved in recent years, so that the uniformity of a temperature field, the working efficiency and the like of the vacuum annealing furnace are more and more paid attention to.

The working principle of the vacuum annealing furnace is that a workpiece to be processed is placed on a supporting frame in a heating chamber, under the working vacuum degree, a heating element is controlled by a temperature control instrument to generate resistance heat, a low-voltage large-current mode is utilized, heat is concentrated in the heating chamber through the reflection effect of a radiation screen to form a uniform temperature environment, the workpiece is heated, and after the workpiece reaches the process required temperature and the heat preservation time, the workpiece starts to be cooled at a proper speed.

Currently, wide band annular heating bands are commonly employed for internal heating, the annular heating bands surrounding the heating chamber sidewalls, an annular arrangement surrounding the heating chamber, and providing heat transfer and heat radiation from multiple angles to the workpiece located within the annular heating chamber. However, since the wide-band annular heating belt is only enclosed on the side wall of the heating chamber, the heating temperature of each region in the heating chamber is not uniform, and the heating effect of the workpiece is affected, thereby reducing the heating quality of the workpiece.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defect that the temperature environment in a heating chamber is uneven due to a wide-band annular heating belt in the prior art and the heating quality of a workpiece is reduced, so that the annealing furnace heating system capable of improving the heating quality of the workpiece is provided.

In order to solve the technical problems, the utility model provides an annealing furnace heating system, which comprises:

the furnace body is provided with a heating cavity, and two end covers are respectively arranged at the two axial ends of the heating cavity;

the first heating structure is arranged on the inner side wall of the heating cavity;

and the second heating structure is arranged on the inner walls of the end covers at the two ends of the heating cavity.

Optionally, the first heating structure and the second heating structure are both heating rods, and the heating rods are electrically connected with a power supply assembly.

Optionally, the power supply assembly comprises a copper-clad transformer adapted to provide a voltage to the heating rod and a power supply water-cooled electrode adapted to provide a current to the heating rod.

Optionally, a voltage regulator is further electrically connected to the copper-clad transformer, and the voltage regulator is adapted to regulate the voltage supplied to the heating rod.

Optionally, the power supply water-cooled electrode is electrically connected with the heating rod through a copper bar arranged in the furnace, and the copper bar is suitable for adjusting current flowing to the heating rod.

Optionally, the heating cavity is divided into an upper cavity and a lower cavity by the shaft section, and the first heating structure on the inner side wall of the upper cavity, the first heating structure on the inner wall of the lower cavity and the second heating structure on the inner side wall of the end cover are all mutually independent.

Optionally, the first heating structure and the second heating structure each comprise a plurality of sections arranged in a bending manner.

Optionally, the first heating structures are arranged in sections along the axial direction of the furnace body, and the bending directions of the two adjacent sections of the first heating structures are opposite.

Optionally, a plurality of temperature detectors are disposed within the heating chamber.

Optionally, a material rack is fixed in the heating cavity.

The technical scheme of the utility model has the following advantages:

1. the utility model provides an annealing furnace heating system, which comprises a furnace body, a first heating structure and a second heating structure, wherein the furnace body is provided with a heating cavity, and two end covers are respectively arranged at the two axial ends of the heating cavity; the first heating structure is arranged on the inner side wall of the heating cavity; the second heating structure is arranged on the inner walls of the end covers at the two ends of the heating cavity. The first heating structure and the second heating structure are respectively arranged on the inner side wall of the heating cavity and the inner walls of the two end covers so as to cover all areas inside the furnace body as much as possible, thereby improving the temperature uniformity of all areas in the heating cavity and improving the heating quality of the workpiece.

2. According to the annealing furnace heating system provided by the utility model, the heating cavity is divided into the upper cavity and the lower cavity by the shaft section, and the first heating structure on the inner side wall of the upper cavity, the first heating structure on the inner side wall of the lower cavity and the second heating structure on the inner wall of the end cover are all mutually independent. Because the temperatures of the upper cavity and the lower cavity are different, the heating temperature of the upper cavity and the lower cavity of the first heating structure is respectively controlled by dividing the heating cavity into the upper cavity and the lower cavity, so that the uniformity of the temperature in the heating cavity is further improved.

3. According to the annealing furnace heating system provided by the utility model, the first heating structures are arranged in sections along the axial direction of the furnace body, and the bending directions of the two adjacent sections of the first heating structures are opposite. The first heating structure can be arranged in a segmented mode, the first heating structure is prevented from being deformed due to thermal expansion, the two adjacent sections of the first heating structures are oppositely arranged in bending directions, parallel connection of the two adjacent sections of the first heating structures is achieved, and therefore the connecting piece is shortened, and large current is adapted.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an annealing furnace heating system provided by the utility model;

FIG. 2 is a schematic diagram II of the annealing furnace heating system provided by the utility model.

Reference numerals illustrate:

1. a furnace body; 2. a heating chamber; 3. a first heating structure; 4. a material rack; 5. a second heating structure; 6. an end cap.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

One embodiment of the annealing furnace heating system shown in fig. 1 and 2 comprises a furnace body 1, a first heating structure 3 and a second heating structure 5.

The furnace body 1 is cylindrical, a heating cavity 2 is arranged in the furnace body 1, a first heating structure 3 is arranged on the inner side wall of the heating cavity 2, two end covers 6 are respectively arranged at the two axial ends of the heating cavity 2, and a second heating structure 5 is arranged on the inner walls of the two end covers 6; the first heating structure 3 and the second heating structure 5 are respectively arranged on the inner side wall of the heating cavity 2 and the inner walls of the two end covers 6, so that the temperature uniformity of each area in the heating cavity 2 is improved, and the heating quality of a workpiece is improved.

The heating cavity 2 is divided into an upper cavity and a lower cavity by the shaft section, and a first heating structure 3 on the inner side wall of the upper cavity, a first heating structure 3 on the inner side wall of the lower cavity and a second heating structure 5 on the inner wall of the end cover 6 are mutually independent. Because the temperatures of the upper cavity and the lower cavity are different, the heating temperature of the upper cavity and the lower cavity of the first heating structure 3 is respectively controlled by dividing the heating cavity 2 into the upper cavity and the lower cavity, so that the temperature uniformity in the heating cavity 2 is further improved. Meanwhile, each area in the heating cavity 2 is provided with a temperature detector, in the embodiment, the temperature detector is a double-core temperature thermocouple, the temperature measuring range of the double-core temperature thermocouple is-20-1320 ℃, the precision can reach +/-1 ℃, and the temperature of each area is detected through the temperature detector so as to adjust the heating quantity of each area in real time, so that the optimal temperature heating effect is realized. A material rack 4 is fixed in the heating cavity 2, and a piece to be heated is placed on the material rack 4 to heat the piece to be heated.

The first heating structure 3 and the second heating structure 5 are both heating rods, and a round heating rod is adopted, so that the heating range is more uniform; the first heating structure 3 and the second heating structure 5 comprise a plurality of sections which are arranged in a bending mode, and the first heating structure 3 and the second heating structure 5 are formed by splicing a plurality of bent S-shaped structures. The first heating structure 3 is arranged in four sections along the axial direction of the furnace body 1, and deformation of the first heating structure 3 caused by thermal expansion can be avoided by arranging the first heating structure 3 in sections; and the bending directions of the two adjacent sections of first heating structures 3 are opposite, and the parallel symmetrical arrangement of the two adjacent sections of first heating structures 3 is realized by arranging the bending directions of the two adjacent sections of first heating structures 3 in opposite directions, so that the two sections of first heating structures 3 which are connected in parallel with each other are connected in parallel again and are connected with a power supply assembly, thereby shortening the connecting piece to adapt to high current, and simultaneously, the cost can be reduced.

The heating rod is electrically connected with a power supply assembly. The power supply assembly comprises a copper-clad transformer and a power supply water-cooled electrode, wherein the copper-clad transformer is connected to provide voltage for the heating rod, and the power supply water-cooled electrode is connected to provide current for the heating rod. The copper-clad transformer is also electrically connected with a voltage regulator, which is a thyristor voltage regulator, and the voltage supplied to the first heating structure 3 and the second heating structure 5 is regulated by the voltage regulator. The power supply water-cooled electrode is electrically connected with the heating rod through a copper bar arranged in the furnace, and current flowing to the heating rod is regulated through the copper bar. The heating rod generates heat resistance by adopting a low-voltage high-current mode, so that a uniform-temperature environment is formed in the heating cavity 2 to heat the workpiece to be heated.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. An annealing furnace heating system, comprising:

the furnace body (1) is provided with a heating cavity (2), and two end covers (6) are respectively arranged at the two axial ends of the heating cavity (2);

the first heating structure (3) is arranged on the inner side wall of the heating cavity (2);

and the second heating structure (5) is arranged on the inner walls of end covers (6) at the two ends of the heating cavity (2).

2. The annealing furnace heating system according to claim 1, characterized in that the first heating structure (3) and the second heating structure (5) are both heating rods, which are electrically connected with a power supply assembly.

3. The lehr heating system of claim 2 wherein the power supply assembly includes a copper clad transformer adapted to provide a voltage to the heating rod and a power supply water cooled electrode adapted to provide a current to the heating rod.

4. An annealing furnace heating system according to claim 3, wherein the copper clad transformer is further electrically connected to a voltage regulator adapted to regulate the voltage supplied to the heating rod.

5. The lehr heating system of claim 4 wherein the powered water cooled electrode is electrically connected to the heating rod by a copper bar disposed within the furnace, the copper bar being adapted to regulate the current to the heating rod.

6. Annealing furnace heating system according to any of claims 1-5, characterized in that the heating chamber (2) is divided by an axial section into an upper chamber and a lower chamber, the first heating structure (3) on the inner side wall of the upper chamber, the first heating structure (3) on the inner side wall of the lower chamber and the second heating structure (5) on the inner wall of the end cap (6) being arranged independently of each other.

7. The lehr heating system according to claim 6, wherein the first heating structure (3) and the second heating structure (5) each comprise a plurality of segments in a bent arrangement.

8. The annealing furnace heating system according to claim 7, wherein the first heating structures (3) are arranged in sections along the axial direction of the furnace body (1), and bending directions of two adjacent sections of the first heating structures (3) are opposite.

9. Annealing furnace heating system according to any of claims 1-5, characterized in that a plurality of temperature detectors are arranged in the heating chamber (2).

10. Annealing furnace heating system according to any of claims 1-5, characterized in that a material rack (4) is fixed in the heating chamber (2).