CN105865015B

CN105865015B - Electromagnetic assembly for carrying out eddy current heating at air gap by adopting water cooling mode

Info

Publication number: CN105865015B
Application number: CN201610385416.9A
Authority: CN
Inventors: 李宗宪
Original assignee: Tangshan Hangqing New Energy Co ltd
Current assignee: Tangshan Hangqing New Energy Co ltd
Priority date: 2016-06-03
Filing date: 2016-06-03
Publication date: 2020-04-03
Anticipated expiration: 2036-06-03
Also published as: CN105865015A

Abstract

The invention relates to an electromagnetic assembly for heating eddy current at an air gap by adopting a water cooling mode, which comprises an inductor, a cold water pipe, a cooling water inlet pipe, a hot water pipe and a cooling water outlet pipe, wherein the cold water pipe is connected with the cold water inlet pipe; the inductor comprises a fixed support, a U-shaped magnetic core, a winding, a metal heating pipe and a cooling water pipe; the U-shaped magnetic cores are arranged on the fixed bracket and are arranged up and down symmetrically; the winding is arranged on the U-shaped magnetic core; the metal heating pipe is positioned between the windings; the cooling water pipe is arranged on the outer side of the winding and in the U-shaped magnetic core; the cold water pipe, the metal heating pipe and the hot water pipe are sequentially connected; the cooling water inlet pipe, the cooling water pipe and the cooling water outlet pipe are sequentially connected, the cooling water inlet pipe is communicated with the cold water pipe, and the cooling water outlet pipe is communicated with the hot water pipe. The invention has the advantages of simple structure, low cost, small magnetic leakage, high electromagnetic conversion efficiency and the like.

Description

Electromagnetic assembly for carrying out eddy current heating at air gap by adopting water cooling mode

Technical Field

The invention relates to an electromagnetic assembly, in particular to an electromagnetic assembly for carrying out eddy current heating at an air gap by adopting a water cooling mode, and belongs to the technical field of electromagnetic eddy current heating.

Background

The traditional boiler adopts fire coal to generate flame, and the flame heats a metal pot; the heating mode has low heat conversion efficiency, often needs to be observed by people, has large equipment volume, is easy to cause accidents due to improper control of the pot body belonging to a pressure container, and is easy to cause fire and coal gas poisoning due to coal burning; a large amount of polluting gas is discharged, and the environment is polluted. At present, clean gas such as natural gas is gradually used in boilers, so that the pollution is low, but the defects of coal-fired boilers still exist, and natural gas pipelines need to be paved.

In order to improve the above problems, boilers heated by electric heating pipes are also being popularized gradually. The method still has the problems of low thermal conversion efficiency, easy scaling of the boiler, influence on heating efficiency and the like, and in addition, the cost is higher.

At present, a new boiler adopts the electromagnetic eddy current mode to heat, twines solenoid on the pipeline wall that contains iron or nickel, and controllable alternating current power supply provides alternating current power supply for the coil to produce the eddy current on technical pipeline and generate heat, the pipeline heats the water in the pipeline. The heating mode has high heat conversion efficiency, low cost and simple equipment, and is safe and reliable because water and electricity are completely separated. However, the existing eddy current heating coil and pipeline have the structure that the pipeline passes through the coil, and no magnetic core or a small amount of magnetic core is added outside the coil, so that the leakage inductance of the coil is large, and the magnetic field converted by the electric field does not generate eddy current on the wall of the pipeline completely.

Therefore, in order to solve the above technical problems, it is necessary to provide an innovative electromagnetic assembly using water cooling to perform eddy current heating at the air gap, so as to overcome the above-mentioned drawbacks in the prior art.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide an electromagnetic assembly that has a simple structure, low cost, low magnetic flux leakage, and high electromagnetic conversion efficiency, and performs eddy current heating at an air gap by using a water cooling method.

In order to achieve the purpose, the invention adopts the technical scheme that: an electromagnetic assembly for heating eddy current at an air gap by adopting a water cooling mode comprises an inductor, a cold water pipe, a cooling water inlet pipe, a hot water pipe and a cooling water outlet pipe; the inductor comprises a fixed support, a U-shaped magnetic core, a winding, a metal heating pipe and a cooling water pipe; the U-shaped magnetic cores are arranged on the fixed bracket and are arranged up and down symmetrically; the winding is arranged on the U-shaped magnetic core; the metal heating pipe is positioned between the windings; the cooling water pipe is arranged on the outer side of the winding and in the U-shaped magnetic core; the cold water pipe, the metal heating pipe and the hot water pipe are sequentially connected; the cooling water inlet pipe, the cooling water pipe and the cooling water outlet pipe are sequentially connected, the cooling water inlet pipe is communicated with the cold water pipe, and the cooling water outlet pipe is communicated with the hot water pipe.

The electromagnetic component for heating the air gap by eddy current in a water cooling mode is further provided with: the winding is specifically provided with 2, and is arranged in a 2 x 2 matrix.

The electromagnetic component for heating the air gap by eddy current in a water cooling mode is further provided with: the cross section of the metal heating pipe is square, and the surface of the metal heating pipe is wrapped with a heat-insulating layer.

The electromagnetic component for heating the air gap by eddy current in a water cooling mode is further provided with: and the winding is connected with a winding outgoing line.

The electromagnetic component for heating the air gap by eddy current in a water cooling mode is also provided with: the hot water pipe is provided with a thermocouple.

Compared with the prior art, the invention has the following beneficial effects: compared with the traditional method of putting the heated body into the coil, the electromagnetic assembly which carries out eddy current heating at the air gap by adopting the water cooling mode has less external magnetic leakage and high electromagnetic heat conversion efficiency. The inductor in the assembly can be used as one module, a plurality of modules can be connected in parallel for use, and the series and standard production is very convenient.

[ description of the drawings ]

FIG. 1 is a schematic diagram of an electromagnetic assembly of the present invention using water cooling for eddy current heating at the air gap.

Fig. 2 is a cross-sectional view of the inductor in fig. 1.

[ detailed description ] embodiments

Referring to the attached

drawings

1 and 2 of the specification, the electromagnetic assembly for heating eddy current at an air gap by using a water cooling mode comprises an inductor 1, a cold water pipe 2, a cooling water inlet pipe 3, a hot water pipe 4, a cooling water outlet pipe 5 and the like.

The inductor 1 comprises a fixing bracket 11, a U-shaped magnetic core 12, a winding 13, a metal heating pipe 14 and a cooling water pipe 15. The U-shaped magnetic core 12 is mounted on the fixed support 11 and is arranged up and down symmetrically. The windings 13 are disposed on the U-shaped magnetic core 12, and specifically, there are 2 windings, and the windings are arranged in a 2 × 2 matrix. And a winding lead-out wire 16 is connected to the winding 13. The metal heating pipe 14 is located between the windings 13, is used for heating cold water, and has a square cross section, and the surface of the metal heating pipe is wrapped with an insulating layer 17. The cooling water pipe 15 is arranged outside the winding 13 and inside the U-shaped magnetic core 12.

The cold water pipe 2, the metal heating pipe 14 and the hot water pipe 4 are connected in sequence, so that water flows through the cold water pipe 2, the metal heating pipe 14 and the hot water pipe 4 in sequence and is heated in the metal heating pipe 14. A thermocouple 41 for monitoring the water temperature is arranged on the hot water pipe 4.

The cooling water inlet pipe 3, the cooling water pipe 15 and the cooling water outlet pipe 5 are sequentially connected, the cooling water inlet pipe 3 is communicated with the cold water pipe 2, and the cooling water outlet pipe 5 is communicated with the hot water pipe 4, so that cooling water for cooling the U-shaped magnetic core 12 and the winding 13 also enters the hot water pipe 4 after being heated, the whole system is free of heat loss, and the electric-heat conversion maximization of the whole system is guaranteed.

The design principle of the electromagnetic assembly for heating eddy current at the air gap by adopting the water cooling mode is as follows: when the inductor 1 is connected to an electromagnetic heating high-frequency heating power supply, the inductor 1 generates an alternating high-frequency magnetic field at the air gap, the high-frequency magnetic field can generate eddy current and heat on the metal heating pipe 14 in the air gap, and the metal heating pipe 14 heats hot water in the pipeline after heating.

The above embodiments are merely preferred embodiments of the present disclosure, which are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present disclosure, should be included in the scope of the present disclosure.

Claims

1. The utility model provides an adopt water-cooling mode to carry out vortex heating's electromagnetism subassembly in air gap department which characterized in that: which consists of an inductor, a cold water pipe, a cooling water inlet pipe, a hot water pipe and a cooling water outlet pipe,

wherein, the inductor comprises a fixed bracket, two U-shaped magnetic cores, four windings, a metal heating pipe and a cooling water pipe, the two U-shaped magnetic cores are arranged on the fixed bracket, the openings of the two U-shaped magnetic cores are opposite and are arranged up and down symmetrically, the windings are respectively arranged on two magnetic core columns of the two U-shaped magnetic cores, the windings are arranged in a 2 x 2 matrix, the windings are connected with winding lead-out wires, the metal heating pipe is positioned between the windings and used for heating cold water, the cross section of the metal heating pipe is square, the surface of the metal heating pipe is wrapped with a heat insulation layer, the cooling water pipe is arranged at the outer side of the windings and in the U-shaped magnetic cores, the cold water pipe, the metal heating pipe and the hot water pipe are sequentially connected, so that water sequentially flows through the cold water pipe, the metal heating pipe and the hot water pipe and is heated in the metal, the cooling water inlet pipe, the cooling water pipe and the cooling water outlet pipe are sequentially connected, the cooling water inlet pipe is communicated with the cold water pipe, the cooling water outlet pipe is communicated with the hot water pipe, so that cooling water used for cooling the magnetic core and the winding also enters the hot water pipe after being heated, the inductor generates an alternating high-frequency magnetic field at the air gap after being connected to an electromagnetic heating high-frequency heating power supply, the high-frequency magnetic field can enable the metal heating pipe in the air gap to generate vortex and generate heat, and the metal heating pipe heats hot water in the pipeline after generating heat.