Intensive branch electrode magnetic field mutual inductance shielding device and electrode device

Abstract

The utility model aims to solve the technical problems that when a plurality of electrode columns are used at the same time, current interference is generated among the electrode columns, and particularly when the current of each electrode column is detected, mutual inductance is generated among the electrode columns and between the electrode columns and coils of adjacent current sensors. The magnetic field mutual inductance shielding device between the dense branch electrodes comprises at least two first sheet-shaped insulating magnetizers which are arranged face to face, the two first sheet-shaped insulating magnetizers form a shielding space used for containing electrode columns, the electrode device comprises the multiple electrode columns which are arranged in parallel, and when current is introduced between the electrode columns at the same time, the shielding space is formed by the two first sheet-shaped insulating magnetizers. Mutual inductance is generated between the adjacent electrode columns, the magnetic field mutual inductance shielding device between the dense branch electrodes is further included, by means of the magnetic field mutual inductance shielding device between the dense branch electrodes, mutual inductance between the electrode columns and current sensors located on the adjacent electrode columns is effectively reduced or eradicated, and detected current is good in accuracy and high in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of electric welding equipment, and particularly relates to a magnetic field mutual inductance shielding device between electrodes of a dense branch circuit. Background Art

[0002] In order to solve the problem that the welding quality of each projection point cannot be known during projection welding of the existing projection welder, our company has developed a shunt type electrode device for a projection welder, as Figure 1 shown. The electrode device includes a main electrode 100 and at least two sub - electrodes 200. The sub - electrodes are arranged side by side at intervals on the surface of the main electrode. The main electrode and each sub - electrode are electrically connected. A current sensor 300 is respectively arranged on each sub - electrode to detect the current passing through the sub - electrode. During welding, each sub - electrode corresponds to a projection point, and multiple sub - electrodes are densely arranged. Since there is current on each sub - electrode during welding and the current is very large, reaching the gigabit level, the currents on the sub - electrodes will interfere with each other, and at the same time, they will be mutually inducted by the current sensors of adjacent sub - electrodes and thus detected, affecting the current value of the sub - electrode detected by the current sensor and making the measured current value inaccurate. The same situation exists in the occasion where multiple electrode columns are used simultaneously. Content of the Utility Model

[0003] The purpose of the utility model is to provide a magnetic field mutual inductance shielding device between electrodes of a dense branch circuit for the technical problem that when multiple electrode columns are used simultaneously, current interference will occur between them, especially when the current of each electrode column is detected respectively, mutual inductance will occur between the electrode columns and between the electrode columns and the coils of adjacent current sensors.

[0004] The purpose of the utility model is realized by the following technical scheme:

[0005] The magnetic field mutual inductance shielding device between electrodes of a dense branch circuit includes at least two sheet - shaped insulating magnetic conductors arranged face to face, and the two sheet - shaped insulating magnetic conductors form a shielding space for accommodating electrode columns;

[0006] Each of the sheet - shaped insulating magnetic conductors is arranged in parallel;

[0007] The sheet - shaped insulating magnetic conductors are arranged side by side in a straight line or arranged in a curve;

[0008] Each of the sheet - shaped insulating magnetic conductors is arranged in a ring, and the ring is a polygon, a circle, an ellipse or a curved ring;

[0009] At one end of the sheet-shaped insulating magnetic conductor I, a sheet-shaped insulating magnetic conductor II is provided, and the end of the sheet-shaped insulating magnetic conductor I is fixedly connected by the sheet-shaped insulating magnetic conductor II to form a three-sided fence structure; or sheet-shaped insulating magnetic conductors II are respectively provided at both ends of the sheet-shaped insulating magnetic conductor I, and the corresponding ends of the sheet-shaped insulating magnetic conductor I are respectively fixedly connected by the sheet-shaped insulating magnetic conductors II. The sheet-shaped insulating magnetic conductors are block-shaped or strip-shaped. When the sheet-shaped insulating magnetic conductor II is block-shaped, at least one sheet-shaped insulating magnetic conductor II is provided between every two adjacent sheet-shaped insulating magnetic conductors I. When the sheet-shaped insulating magnetic conductor II is strip-shaped, each of the sheet-shaped insulating magnetic conductors I is fixedly connected by the sheet-shaped insulating magnetic conductor.

[0010] At one end of the sheet-shaped insulating magnetic conductor I, a sheet-shaped insulating magnetic conductor II is provided, and the end of the sheet-shaped insulating magnetic conductor I is fixedly connected by the sheet-shaped insulating magnetic conductor II; or sheet-shaped insulating magnetic conductors II are respectively provided at both ends of the sheet-shaped insulating magnetic conductor I, and the corresponding ends of the sheet-shaped insulating magnetic conductor I are respectively fixedly connected by the sheet-shaped insulating magnetic conductors II. The sheet-shaped insulating magnetic conductor II is ring-shaped.

[0011] An electrode device includes a plurality of electrode columns arranged in parallel. When currents are simultaneously passed between the electrode columns, mutual inductance is generated between adjacent electrode columns. The electrode device further includes the above-mentioned magnetic field mutual inductance shielding device between dense branch electrodes. An electrode column is provided in each of the shielding spaces, and a current sensor is sleeved on each electrode column provided in the shielding space. The current sensor is located between two sheet-shaped insulating magnetic conductors I.

[0012] The electrode column is an independent electrode.

[0013] The electrode column is a sub-electrode provided on the surface of a main electrode.

[0014] The current sensor is a Hall coil or a Rogowski coil.

[0015] For the magnetic field mutual inductance shielding device between dense branch electrodes adopting the structure of the present utility model, an insulating layer or an insulating structure is provided outside the sheet-shaped magnetic conductor. The magnetic conductors are arranged oppositely, and there is a space for accommodating the current sensor of the electrode column between them. Therefore, the electrode column and the current sensor adjacent to the electrode column can be isolated. Thus, the mutual inductance between the electrode column and the current sensor located on the adjacent electrode column is effectively reduced or eliminated, and the detected current has good accuracy and high reliability.

[0016] The electrode device adopting the structure of the present utility model has electrode columns arranged densely. When electrified, mutual inductance is generated between adjacent electrode columns. Since there is one electrode column in a shielding space, the current between electrode columns is shielded, and the electrode column and the adjacent current sensor are separated. A barrier is formed by the first sheet-shaped insulating and magnetic conductor, which can block the mutual inductance between the electrode column and the current sensor. Therefore, the current detected by the current sensor is more accurate. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the shunt-type electrode device described in the background art of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of an embodiment of the magnetic field mutual inductance shielding device between electrodes of the present utility model;

[0019] Figure 3 It is a schematic structural diagram of an embodiment of the position and cooperation relationship between the magnetic field mutual inductance shielding device between electrodes of the present utility model with dense branches and the current sensor;

[0020] Figure 4 It is a schematic structural diagram of an embodiment of the position and cooperation relationship between the magnetic field mutual inductance shielding device between electrodes of the present utility model with dense branches and the current sensor, and only part of the electrode columns are shown therein.

[0021] Description of the Reference Numerals in the Drawings

[0022] 100 - Total electrode;

[0023] 200 - Electrode column;

[0024] 300 - Current sensor;

[0025] 400 - Shielding device; 401 - First sheet-shaped insulating and magnetic conductor; 402 - Second sheet-shaped insulating and magnetic conductor Detailed Embodiment

[0026] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0027] The dense-branch electrodes described in this patent application refer to an electrode device with an interval of less than 5 mm between two electrodes. For example Figures 2 - 4As shown in the figure, the magnetic field mutual inductance shielding device between dense branch electrodes of the structure of the present utility model includes a sheet-shaped magnetic conductor. An insulating layer or insulating structure is provided outside the sheet-shaped magnetic conductor to form a sheet-shaped insulating magnetic conductor. A magnetic conductive iron sheet is used as the sheet-shaped magnetic conductor, and an insulating paint is integrally coated on the outer surface of the sheet-shaped magnetic conductive iron sheet so that the magnetic conductive iron sheet is both magnetic conductive and insulating, thereby obtaining a sheet-shaped insulating magnetic conductor. At least two block-shaped sheet-shaped insulating magnetic conductors 401 are arranged face to face to form a shielding space, and each shielding space is used to arrange an electrode column. The relative planes of the two sheet-shaped insulating magnetic conductors 401 can be arranged in parallel, or can be inclined to each other in a V shape. Each sheet-shaped insulating magnetic conductor 401 can be arranged in a straight line, or arranged along a curve, or arranged in a ring, such as arranged in a rectangle, a circle, an ellipse, a curve ring, etc. The distances between two adjacent sheet-shaped insulating magnetic conductors 401 can be equal or unequal, depending on the arrangement of the electrode columns. Preferably, a sheet-shaped insulating magnetic conductor 2 is fixedly arranged at one end of the sheet-shaped insulating magnetic conductor 1, and the sheet-shaped insulating magnetic conductor 2 is fixedly connected to one end of the sheet-shaped insulating magnetic conductor 1 respectively to close one end of two adjacent sheet-shaped insulating magnetic conductors 1, forming a three-sided fence-like shielding structure, or sheet-shaped insulating magnetic conductors 2 are respectively arranged at both ends of adjacent sheet-shaped insulating magnetic conductors 1, and the sheet-shaped insulating magnetic conductor 1 and the sheet-shaped insulating magnetic conductor 2 are fixedly connected to form a four-sided fence-like shielding structure. Such a structure has a better shielding effect. The sheet-shaped insulating magnetic conductor 2 can be arranged in a block or in a strip. When arranged in a block, one sheet-shaped insulating magnetic conductor 2 is arranged between two adjacent sheet-shaped insulating magnetic conductors 1. When the sheet-shaped insulating magnetic conductor 2 is arranged in a strip, one sheet-shaped insulating magnetic conductor 2 is fixedly connected to a plurality of juxtaposed sheet-shaped insulating magnetic conductors 1. When the sheet-shaped insulating magnetic conductors 1 are arranged in a ring, the sheet-shaped insulating magnetic conductor 2 forms a ring structure. As Figure 2 shown, the sheet-shaped insulating magnetic conductor 2 forms a rectangular structure, and a plurality of sheet-shaped insulating magnetic conductors 1 are arranged on each side along the edge of the rectangular structure. Preferably, the thickness of the sheet-shaped insulating magnetic conductor 1 is the same as the thickness of the sheet-shaped insulating magnetic conductor 2, and the heights are equal.

[0028] With the above structure, adjacent electrode columns are isolated by the insulating magnetic conductor, and the current on the electrode column will not flow into the coil of the adjacent current sensor, shielding the electrode column. When there is current passing through the adjacent electrode columns, the interference to the self-inductance coil on the adjacent electrode columns is reduced. Therefore, the mutual inductance between the electrode columns and between the electrode column and the adjacent current sensor is low, and the accuracy of the current value measured by the current sensor is high.

[0029] The utility model provides a dense branch electrode device, which includes a plurality of electrode columns. The electrode columns are densely distributed among each other and can generate magnetic field interference with each other when passing current. An electrode column is arranged in each shielding structure, and a current sensor is arranged on each electrode column. The current sensor is located between two oppositely arranged sheet-shaped insulating and magnetically conductive bodies. The current sensor is isolated from the adjacent electrode column by the sheet-shaped insulating and magnetically conductive body I. Therefore, no mutual inductance or very weak mutual inductance is generated between the adjacent electrode column and the current sensor, which will not affect the detection accuracy of the current sensor. The electrode column can be an independent electrode or a sub-electrode fixedly arranged on the surface of a total electrode. The current of the total electrode is shunted to each sub-electrode. The current sensor 300 preferably adopts a Hall coil or a Rogowski coil.

Claims

1. A magnetic field mutual inductance shielding device between dense branch electrodes, characterized in that: It comprises at least two sheet-shaped insulating magnetic conductors 1 arranged face to face with each other, and the two sheet-shaped insulating magnetic conductors 1 form a shielding space for accommodating an electrode column.

2. The magnetic field mutual inductance shielding device between dense branch electrodes as claimed in claim 1, characterized in that: Each of the sheet-shaped insulating magnetic conductors is arranged in parallel.

3. The magnetic field mutual inductance shielding device between dense branch electrodes according to claim 1 or 2, characterized in that: The sheet-shaped insulating magnetic conductors are arranged side by side along a straight line or along a curve.

4. The magnetic field mutual inductance shielding device between dense branch electrodes according to claim 1 or 2, characterized in that: Each of the sheet-like insulating magnetic conductors is arranged along a ring shape, and the ring shape is a polygonal, circular, elliptical or curved ring shape.

5. The magnetic field mutual inductance shielding device between dense branch electrodes as claimed in claim 3, characterized in that: A sheet-like insulating magnetic conductor 2 is arranged at one end of the sheet-like insulating magnetic conductor 1, and the sheet-like insulating magnetic conductor 2 is fixedly connected to the end of the sheet-like insulating magnetic conductor 1 to form a three-sided fence structure; or sheet-like insulating magnetic conductors 2 are respectively arranged at both ends of the sheet-like insulating magnetic conductor 1, and the sheet-like insulating magnetic conductor 2 is respectively fixedly connected to the corresponding ends of the sheet-like insulating magnetic conductor 1, and the sheet-like insulating magnetic conductor 1 is in the shape of a block or a long strip. When the sheet-like insulating magnetic conductor 2 is in the shape of a block, a sheet-like insulating magnetic conductor 2 is arranged between at least every two adjacent sheet-like insulating magnetic conductors. When the sheet-like insulating magnetic conductor 2 is in the shape of a long strip, the sheet-like insulating magnetic conductor 1 is fixedly connected to each sheet-like insulating magnetic conductor 1.

6. The magnetic field mutual inductance shielding device between dense branch electrodes as claimed in claim 4, characterized in that: A sheet-like insulating magnetic conductor 2 is arranged at one end of the sheet-like insulating magnetic conductor 1, and the sheet-like insulating magnetic conductor 2 is fixedly connected to the end of the sheet-like insulating magnetic conductor 1; or sheet-like insulating magnetic conductors 2 are respectively arranged at both ends of the sheet-like insulating magnetic conductor 1, and the sheet-like insulating magnetic conductor 2 is respectively fixedly connected to the corresponding ends of the sheet-like insulating magnetic conductor 1, and the sheet-like insulating magnetic conductor 2 is ring-shaped.

7. An electrode device, comprising a plurality of electrode columns arranged in parallel, wherein when current is simultaneously passed between the electrode columns, mutual inductance is generated between adjacent electrode columns, characterized in that: It also includes the magnetic field mutual inductance shielding device between dense branch electrodes as described in any one of claims 1-6, wherein an electrode column is arranged in each of the shielding spaces, and a current sensor is sleeved on each electrode column arranged in the shielding space, and the current sensor is located between two sheet-like insulating magnetic conductors.

8. An electrode device according to claim 7, characterized in that: The electrode column is an independent electrode.

9. An electrode device according to claim 7, characterized in that: The electrode column is a sub-electrode arranged on the surface of a total electrode.

10. An electrode device according to claim 7, characterized in that: The current sensor is a Hall coil or a Rogowski coil.

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