CN113035522A

CN113035522A - High-frequency welding impedor magnetic core

Info

Publication number: CN113035522A
Application number: CN202110016700.XA
Authority: CN
Inventors: 高义
Original assignee: Tianjin Yite Magnetic Technology Co ltd
Current assignee: Tianjin Yite Magnetic Technology Co ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-06-25

Abstract

The application relates to a high-frequency welding impeder magnetic core, which comprises cooling water, an impeder magnetic core, a working coil, a squeeze roller, an impeder and a steel pipe; the squeeze roll sets up the inside extrusion in steel pipe both sides is used for fixing the position of steel pipe, quilt on the steel pipe surface work coil cup joints, steel pipe inside is provided with the impedor magnetic core with the impedor, the impedor is located the exit of steel pipe, and through nut fixed mounting inside the steel pipe, the nut is kept away from the one end fixed mounting of impedor has the inlet tube, the inlet tube is used for circulating the cooling water, the cooling water is used for reducing the temperature of impedor magnetic core. The impedance device has the manufacturing achievement and the technical effect of realizing high efficiency, electricity saving and long service life.

Description

High-frequency welding impedor magnetic core

Technical Field

The application relates to the technical field of high-frequency welding, in particular to a magnetic core of a high-frequency welding impedor.

Background

The high-frequency welding is a novel welding process for butting steel plates and other metal materials by utilizing a skin effect and a proximity effect generated by high-frequency current, the appearance and the maturity of a high-frequency welding technology are key processes for directly welding straight welding (ERW) production, and the quality of high-frequency welding directly influences the overall strength, the quality grade and the production speed of a welded pipe product.

The high frequency is a high frequency current of 50KHz to 400KHz, which is generally referred to as an ac current frequency of 50Hz, and when the high frequency current passes through a metal conductor, two effects are generated: skin effect and proximity effect, and high-frequency welding is the welding of steel pipes by using the two effects.

The skin effect means that when alternating current with a certain frequency passes through a uniform conductor, the density of the current is not uniformly distributed on all the sections of the conductor, and the current is only concentrated towards the surface of the conductor, namely the density of the current on the surface of the conductor is higher, the density in the conductor is lower, namely the frequency is higher, the current is concentrated on a steel plate, the frequency is lower, the current is more dispersed, the magnetic conductivity is reduced when the temperature is increased, the skin effect is worse, at present, when a high-frequency induction heating method is used for welding, the welding efficiency and stability of an electric welding pipe are influenced by the performance and the service life of an impedor magnetic core, but the technical effects of the related technology cannot realize higher welding efficiency, the service life of the magnetic core is seriously shortened in the using process, and inconvenience is brought to the production and processing processes.

Disclosure of Invention

In order to solve the problems of poor performance and short service life of an impedor magnetic core, the application provides a high-frequency welding impedor magnetic core.

The application provides a high frequency welding impedor magnetic core adopts following technical scheme:

a high-frequency welding impedor magnetic core comprises cooling water, an impedor magnetic core, a working coil, a squeeze roller, an impedor and a steel pipe; the squeeze roll sets up the inside extrusion in steel pipe both sides is used for fixing the position of steel pipe, quilt on the steel pipe surface work coil cup joints, steel pipe inside is provided with the impedor magnetic core with the impedor, the impedor is located the exit of steel pipe, and through nut fixed mounting inside the steel pipe, the nut is kept away from the one end fixed mounting of impedor has the inlet tube, the inlet tube is used for circulating the cooling water, the cooling water is used for reducing the temperature of impedor magnetic core.

Preferably, the two squeeze rollers are oval in shape and size, are respectively arranged on two sides of the steel pipe, and are connected through a connecting rod in the center of the squeeze rollers and act on the steel pipe.

Preferably, the two groups of working coils are half sleeved on the steel pipe and are positioned beside the squeeze roll, and the two groups of working coils are composed of three wire harnesses and are attached to the outer side of the steel pipe.

Preferably, a sleeve is wrapped outside the impeder magnetic core, and the sleeve is fixedly connected with the impeder, provides a flowing direction for the cooling water and limits the flowing range of the cooling water.

Preferably, the impeder is made of an IPH material.

In summary, the present application includes at least one advantageous technical effect;

1. the impedor of this application design adopts the IPH material to realize more high-efficient, more power saving, the manufacturing achievement and the technological accumulation of longer life than original IP1 material, adopts the IPH material simultaneously through reducing the magnetic core loss of original IP1 material by a wide margin (about reducing 60%), can effectually restrain the magnetic flux density that the magnetic core self generates heat and arouses and descend to realize welding efficiency's promotion.

2. This application has avoided in the original product magnetic core to expose the use and combine the easy cooling efficiency who produces the foam with the coolant liquid through having set up devices and accessories such as sleeve pipe, impedor in the magnetic core outside, thereby has reduced the magnetic core, such design both can guarantee low temperature operation environment in the course of the work, has avoided the formation of foam again, simultaneously can also effectual improvement magnetic core cooling effect, realizes improving the effect of welding efficiency and reinforcing welding seam quality.

Drawings

FIG. 1 is a schematic structural view of high-frequency welding in an embodiment of the present application;

FIG. 2 is a temperature profile map of core loss;

FIG. 3 is a temperature profile map of saturation magnetic flux density;

FIG. 4 is a schematic cross-sectional view of a ZR type resistor;

FIG. 5 is an internal cross-sectional view of a ZR type resistor;

FIG. 6 is a schematic cross-sectional view of a ZRH type resistor;

FIG. 7 is an internal cross-sectional view of a ZRH type resistor;

FIG. 8 is a schematic cross-sectional view of an ZRS-type resistor;

FIG. 9 is an internal cross-sectional view of an ZRS-type resistor;

FIG. 10 is a schematic cross-sectional view of a ZRSH type resistor;

FIG. 11 is an internal cross-sectional view of a ZRSH type resistor;

description of reference numerals: 1. cooling water, 2. impeder magnetic cores, 3. working coils, 4. extrusion rolls, 5. extrusion roll centers, 6. impeders and 7. steel pipes.

Detailed Description

The present application is described in further detail below with reference to figures 1-11.

The device comprises cooling water (1), an impeder magnetic core (2), a working coil (3), a squeezing roller (4), an impeder (6) and a steel pipe (7); squeeze roll (4) set up steel pipe (7) both sides are inside to be extruded and are used for fixing the position of steel pipe (7), quilt on steel pipe (7) surface work coil (3) cup joint, steel pipe (7) are inside to be provided with impedor magnetic core (2) with impedor (6), impedor (6) are located the exit of steel pipe (7), and through nut fixed mounting inside steel pipe (7), the nut is kept away from the one end fixed mounting of impedor (6) has the inlet tube, the inlet tube is used for the circulation cooling water (1), cooling water (1) are used for reducing the temperature of impedor magnetic core (2).

Specifically, the two squeeze rollers (4) are oval in shape and size, are respectively arranged on two sides of the steel pipe (7), and are connected through a connecting rod in the center (5) of the squeeze rollers and act on the steel pipe (7).

Specifically, the two groups of working coils (3) are sleeved on the steel pipe (7) in a half-sleeved mode and located beside the squeeze roll (4), and the two groups of working coils (3) are composed of three wire harnesses and are attached to the outer side of the steel pipe (7).

Specifically, a sleeve is wrapped outside the impeder magnetic core (2), is fixedly connected with the impeder (6), and provides a flowing direction for the cooling water (1) and limits the flowing range of the cooling water (1).

Specifically, the impedor is made of an IPH material.

In the case of the example 1, the following examples are given,

referring to fig. 1, in an apparatus for manufacturing an electric welding tube for metal welding by a high frequency induction heating method, an impeder magnetic core 2 is indispensable, and the efficiency and stability of the electric welding tube are influenced by the performance and the service life of the impeder magnetic core 2, while the impeder 6 of the present application uses an IPH material to achieve more efficient, power-saving, and longer-life manufacturing results and technical accumulation than those of the related art using an IP1 material, and the impeder can greatly reduce the magnetic core consumption (about 60% reduction) of the original IP1 material by using the IPH material, and can effectively suppress the decrease of magnetic flux density caused by the self-heating of the magnetic core, thereby achieving efficient welding; and the impeder 6 functions to focus the magnetic flux generated from the work coil 3 to the joint of the pipe so as to improve the welding efficiency, and the welding efficiency is remarkably improved by using the impeder core 2.

Texture characteristics (IPH material)

The initial permeability (mu i) of the impeder made of IPH material is 1800 +/-25% (H is 0.24A/m, f is 100kHz, at23 ℃) which is more than two times higher than that of the impeder made in China by 800 +/-25% (H is 0.24A/m, f is 100kHz, at23 ℃) which is more than that of the impeder made in China, and the saturation magnetic flux density (Bs) is correspondingly higher by 6.5% (the saturation magnetic flux density (Ms) of the present application is not less than 490mT, the saturation magnetic flux density (Ms) of the former China is not less than 460mT) under the same action environment, and the corresponding magnetic core loss (Pcv) is reduced by nearly 45% (the magnetic core loss Pcv of the present application is 10000 kW/m)³: core loss Pcv in the original country: 18000kW/m³) Therefore, the magnetic flux density reduction caused by self heating of the magnetic core in the working process can be restrained by reducing the loss of the magnetic core, and the high-efficiency welding is realized;

referring to fig. 2, a temperature characteristic curve of the impeder core 2 is shown, and f is 400kHzAnd B is 200mT, wherein the ordinate is the magnetic core loss and gradually rises from bottom to top, the abscissa is the temperature and gradually rises from left to right, the two lines respectively represent the conventional material and the IPH material, and the magnetic core loss of the conventional material is always 14000kw/m³Above that, and with the increase of temperature, the core loss also increases gradually, and the core loss of IPH material is not more than 8000kw/m all the time³And the magnetic core loss is even reduced to be close to 5000kw/m at the temperature of 60-80 DEG C³；

Referring to fig. 3, a saturation magnetic flux density-temperature characteristic curve is shown, which defines a state H1194A/m, in which the ordinate represents the magnetic flux density and increases from bottom to top, and the abscissa represents the temperature and gradually increases from left to right, and the characteristic of the curve shows that the density of the saturation magnetic flux corresponding to the increase in temperature gradually decreases.

Example 2

Referring to fig. 4-5, this model is a ZR-type resistor 6, which has an oval cross-sectional shape and can be used in one or a combination of small diameter pipes. Note that: identification method of product name:

specifically, the material name (1), the shape (2), the outer diameter (3) D, and the length (4) L; unit: mm.

Example 3

Referring to fig. 6 to 7, this model is a ZRH type resistor 6, which has a cylindrical cross section and can inject cooling water into an inner diameter portion, 1 pin can be used from a small diameter tube to a large diameter tube, and a holder support rod can be inserted into the inner diameter portion.

Note that: identification method of product name:

specifically, the material name (1), the shape (2), the outer diameter (3), the length (4), and the inner diameter (5) are as follows; unit: mm.

Example 4

Referring to fig. 8 to 9, this type ZRS resistor 6 has a cross section with radial grooves and is shaped to improve the cooling efficiency of the ZR type, thereby effectively cooling the entire core.

Note that: identification method of product name:

Example 5

Referring to fig. 10 to 11, this model is a ZRSH type resistor 6 which takes in the shape of a ZRH type base element and which can inject cooling water to an inner diameter portion and can insert a fixing pole to the inner diameter, but depending on the state of the inner diameter portion of the core, sometimes the holder cannot be easily inserted, so that when the holder is used at the inner diameter portion, attention is paid to it. Note that: identification method of product name:

The implementation principle of the embodiment of the application is as follows: the metal welding is carried out by high-frequency induction heating method, because of skin effect, when high-frequency current flows in the induction coil, high-frequency magnetic flux is generated in the coil, the high-frequency magnetic flux induces eddy current in the welding tube to melt and weld the welding seam, the induced electromotive force of the welding tube can be greatly improved by using the magnetic core, the power is increased, the magnetic flux in the induction coil is intensively divided into the magnetic core by implanting the magnetic core, and the magnetic flux between the induction coil and the welding tube is relatively reduced, thereby improving the welding efficiency.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A high-frequency welding impeder magnetic core is characterized by comprising cooling water (1), an impeder magnetic core (2), a working coil (3), a squeezing roller (4), an impeder (6) and a steel pipe (7); squeeze roll (4) set up steel pipe (7) both sides are inside to be extruded and are used for fixing the position of steel pipe (7), quilt on steel pipe (7) surface work coil (3) cup joint, steel pipe (7) are inside to be provided with impedor magnetic core (2) with impedor (6), impedor (6) are located the exit of steel pipe (7), and through nut fixed mounting inside steel pipe (7), the nut is kept away from the one end fixed mounting of impedor (6) has the inlet tube, the inlet tube is used for the circulation cooling water (1), cooling water (1) are used for reducing the temperature of impedor magnetic core (2).

2. A high frequency welding impeder magnetic core as claimed in claim 1, wherein: the two squeeze rollers (4) are in the shape and the size which are completely the same and are in the oval shape, are respectively arranged on two sides of the steel pipe (7), and are connected through a connecting rod in the center (5) of the squeeze rollers and act on the steel pipe (7).

3. A high frequency welding impeder magnetic core as claimed in claim 1, wherein: the two groups of working coils (3) are sleeved on the steel pipe (7) in a half-sleeved mode and located beside the squeeze roll (4), and the two groups of working coils (3) are composed of three wire harnesses and are attached to the outer side of the steel pipe (7).

4. A high frequency welding impeder magnetic core as claimed in claim 1, wherein: the exterior of the impeder magnetic core (2) is wrapped by a sleeve which is fixedly connected with the impeder (6) and provides a flowing direction for the cooling water (1) and limits the flowing range of the cooling water (1).

5. A high frequency welding impeder magnetic core as claimed in claim 1, wherein: the impedor is made of IPH materials.