CN107567126B

CN107567126B - Electromagnetic heating coil with automatic cooling effect

Info

Publication number: CN107567126B
Application number: CN201710843064.1A
Authority: CN
Inventors: 邱泽坚
Original assignee: Foshan Gao Jie Industrial Furnace Co ltd
Current assignee: Foshan Gao Jie Industrial Furnace Co ltd
Priority date: 2017-09-18
Filing date: 2017-09-18
Publication date: 2020-09-15
Anticipated expiration: 2037-09-18
Also published as: CN107567126A

Abstract

The invention discloses an electromagnetic heating coil with an automatic cooling effect, which comprises a coil body, wherein the coil body is a metal hollow tube, the coil body comprises an air inlet nozzle section, a transition section and a main body section, the air inlet nozzle section is connected with the main body section through the transition section, the inner diameter of the air inlet nozzle section is smaller than that of the main body section, air enters from the small inner diameter of the air inlet nozzle section, and the air flow speed is slowed down through the main body section when the air enters from the large inner diameter of the air inlet nozzle section through the transition section. Through setting up the unequal air inlet nozzle section of internal diameter and main part section, during the air inlet admission pipe, because the change in space, gaseous velocity of motion will change, still can form the torrent in the pipe, causes to carry out the heat exchange between the gas, siphons away a large amount of heats of coil, improves the cooling effect.

Description

Electromagnetic heating coil with automatic cooling effect

Technical Field

The invention relates to the field of heating coils, in particular to an electromagnetic heating coil with an automatic cooling effect.

Background

There are two main types of conventional industrial furnaces: one is to heat the melting furnace by burning fuel, and the other is to heat the pot body by using electric heating tungsten wires. The two existing heating modes of the smelting furnace are that the pot body is heated and heated firstly, and then the melted objects in the pot body smelting furnace are heated by the heat of the pot body through the heat conduction effect.

In the conventional electromagnetic melting furnace, a coil is generally electrified, and a crucible is heated by electromagnetism, but the temperature of the coil is very high during heating because heat conduction exists between the crucible and the coil. It is known that, generally, the higher the temperature, the higher the resistance of the coil, and the heat generation is also increased, which results in the higher and higher temperature of the coil, causing vicious circle, and the loss of electric energy and energy waste.

Therefore, when the coil works, the temperature of the coil is required to be reduced, and the cooling mode of the induction heating coil can be water cooling or air cooling. However, water cooling wastes a large amount of water resources and the coil is susceptible to corrosion under long-term high temperature conditions, while direct air cooling is inefficient.

Disclosure of Invention

In view of the above, the present invention provides an electromagnetic heating coil with an automatic cooling effect.

The utility model provides an electromagnetic heating coil with automatic cooling effect, includes the coil body, the coil body is the metal hollow tube, and the coil body includes air inlet nozzle section, changeover portion and main part section, the air inlet nozzle section passes through the changeover portion with the main part section and is connected, air inlet nozzle section internal diameter is less than the main part section internal diameter, and the air gets into from the little internal diameter of air inlet nozzle section, and the process changeover portion reachs through main part section air flow velocity and slows down.

Preferably, the transition section is a tapered tube, one side with a large diameter of the tapered tube is connected with the main body section, and one side with a small diameter of the tapered tube is connected with the air inlet nozzle section.

Preferably, the taper of the tapered tube is 3.

Preferably, the transition section is fixedly connected with the air inlet nozzle section and the main body section in a seamless mode through welding.

Preferably, the transition section is connected with the air inlet nozzle section and the main body section through screwing of internal and external threads.

Preferably, the coil body is a hollow tube made of copper.

Preferably, the coil body spirals into a helical structure.

The invention has the beneficial effects that: the utility model provides an electromagnetic heating coil with automatically cooling effect, is through setting up different air inlet nozzle section and the main part section of internal diameter, during the air inlet admission pipe, because the change in space, gaseous velocity of motion will change, still can form the torrent in the pipe, causes and carries out the heat exchange between the gas, siphons away a large amount of heats of coil, improves the cooling effect, reachs automatically cooling's effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of an embodiment of a heating coil;

FIG. 2 is a schematic diagram of an embodiment of a coil body;

fig. 3 is a cross-sectional view of an embodiment of a coil body.

Reference numerals

100 coil body 11 air inlet nozzle section

12 transition section 13 main body section

14 air inlet pipeline 15 transition pipeline

16 first connection point of main body duct 17

18 second connection point

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 some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1, 2 and 3, an electromagnetic heating coil with an automatic cooling effect includes a coil body 100, the coil body 100 is a metal hollow tube, the coil body 100 includes a nozzle section 11, a transition section 12 and a main body section 13, the nozzle section 11 is connected to the main body section 13 through the transition section 12, the inner diameter of the nozzle section 11 is smaller than that of the main body section 13, when air enters from the small inner diameter of an air inlet duct 14 of the nozzle section 11 and passes through a transition duct 15 of the transition section 12 to reach the large inner diameter through a main body duct 16 of the main body section 13, due to the increase of air space, when the air enters the main body section 13, the air speed will be slowed down, the air may form a vortex in the main body section 13, backflow or turbulence, which causes heat exchange between the air in the main body section 13 and the air, thereby absorbing a large amount of heat from the coil and improving the.

The transition section 12 is a tapered tube, one side with a large diameter of the tapered tube is connected with the main body section 13 to form a second connection point 18, and one side with a small diameter of the tapered tube is connected with the air inlet nozzle section 11 to form a first connection point 17. Through the conical tube, air can enter the tube without hindrance, the total flow of the air cannot be influenced, and the best taper of the conical tube is 3, so that the air can be smoother.

The transition section 12 is connected with the air inlet nozzle section 11 and the main body section 13 in a welded seamless fixed mode, so that the appearance is attractive, gas leakage can be prevented, and the efficiency is improved.

In addition, the transition section 12, the air inlet nozzle section 11 and the main body section 13 can be connected in a screwing mode through internal and external threads, and therefore installation, disassembly and maintenance are convenient.

The metallic hollow tube coil body 100 may be made of iron, aluminum, or silver, but for cost reasons, a copper hollow tube is generally preferred.

The coil body 100 is wound in a spiral configuration and used as an electromagnetic heating coil.

The embodiment of the invention can carry out sequence adjustment, combination and deletion according to actual needs.

The embodiments describe the present invention in detail, and the specific embodiments are applied to explain the structural principle and the implementation of the present invention, and the above embodiments are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. The utility model provides an electromagnetic heating coil with automatically cooling effect, includes the coil body, its characterized in that: the coil body is a metal hollow tube and comprises an air inlet nozzle section, a transition section and a main body section, wherein the air inlet nozzle section is connected with the main body section through the transition section, the inner diameter of the air inlet nozzle section is smaller than that of the main body section, air enters from the small inner diameter of the air inlet nozzle section and reaches the large inner part through the transition section, and the air flow rate of the main body section is slowed down.

2. The coil of claim 1, wherein: the transition section is a conical pipe, one side with the large diameter of the conical pipe is connected with the main body section, and one side with the small diameter of the conical pipe is connected with the air inlet section.

3. The coil of claim 2, wherein: the taper of the conical tube is 3.

4. The coil of claim 1, wherein: the transition section is connected with the air inlet nozzle section and the main body section in a seamless and fixed mode through welding.

5. The coil of claim 1, wherein: the transition section is connected with the air inlet nozzle section and the main body section through internal and external threads in a screwing mode.

6. The coil of claim 1, wherein: the coil body is a copper hollow tube.

7. The coil of claim 1, wherein: the coil body is spirally wound to form a spiral structure.