CN109100593B

CN109100593B - DC magnetic bias detection device capable of overcoming AC magnetic field interference

Info

Publication number: CN109100593B
Application number: CN201810934770.1A
Authority: CN
Inventors: 吴伟丽; 李磊; 张潇月; 于昌隆; 刘奕童
Original assignee: YILI NORMAL UNIVERSITY; Xian University of Science and Technology
Current assignee: YILI NORMAL UNIVERSITY; Xian University of Science and Technology
Priority date: 2018-08-16
Filing date: 2018-08-16
Publication date: 2020-09-22
Anticipated expiration: 2038-08-16
Also published as: CN109100593A

Abstract

The invention discloses a direct-current magnetic bias detection device capable of overcoming interference of an alternating-current magnetic field, which comprises a box body, wherein two rotating shafts are horizontally and symmetrically and rotatably connected in the box body, rotating blocks are symmetrically and fixedly connected to the two rotating shafts respectively, the upper end, far away from the rotating shafts, of each rotating block extends to the upper side of the box body, two first detection rings and two second detection rings are symmetrically arranged at the upper end of the box body, each first detection ring and each second detection ring are arranged oppositely, each first detection ring and each second detection ring are fixed on the rotating blocks, a fixing mechanism is arranged at one end of each second detection ring, each second detection ring is connected with the first detection ring through a detection mechanism, and the lower end of each rotating block is fixedly connected with a connecting rod. The invention has the advantages of stable structure, simple operation, scientific and reasonable design, short production period, and convenient and simple installation and detection during detection, so that the detection is simpler.

Description

DC magnetic bias detection device capable of overcoming AC magnetic field interference

Technical Field

The invention relates to the technical field of direct current magnetic bias detection, in particular to a direct current magnetic bias detection device capable of overcoming alternating current magnetic field interference.

Background

The high-voltage direct-current transmission technology is rapidly applied and developed in a power grid due to the economical efficiency, stability and scheduling flexibility of operation, the high-voltage direct-current transmission technology mainly exists in the form of an alternating-current and direct-current hybrid power grid at present, but in operation, the high-voltage direct-current transmission network sometimes operates in a single-pole ground loop operation mode, and the operation mode can generate direct-current magnetic biasing influence on a transformer with a neutral point of an alternating-current transformer substation in a peripheral area directly grounded. The direct current magnetic biasing is an abnormal working state of the transformer, and direct current flowing through a transformer winding forms direct current magnetic flux in an iron core, so that magnetic density working points of the iron core of the transformer deviate, and a half-cycle saturation phenomenon of an excitation curve is caused. The magnetic saturation and loss of the iron core are increased due to the overlarge direct current bias, and the misoperation and the operation rejection of local overheating, insulation damage, damage of the transformer and a relay protection device have great influence on the safe operation of a power grid.

At present, in an alternating current-direct current hybrid power grid, a method for detecting direct current magnetic bias mainly detects direct current of a neutral point on a neutral point grounding copper bar of an alternating current transformer substation by using a hall effect clamp-on ammeter so as to determine the influence degree of the direct current magnetic bias, and the specific process is as follows: the Hall effect clamp-on ammeter is manually held, and is clamped on a grounding bar of a neutral point of a tested transformer to test direct current on the grounding bar, if the direct current exceeds the standard, the direct current magnetic bias is serious, and a direct current magnetic bias suppression device needs to be additionally arranged on the neutral point of the transformer to ensure the safe operation of the transformer.

The traditional direct-current magnetic bias detection device capable of overcoming the interference of the alternating-current magnetic field is simple in structure, and simple installation and detection are not convenient to carry out during detection, so that the detection is complicated.

Therefore, a direct current magnetic bias detection device capable of overcoming the interference of an alternating current magnetic field is provided.

Disclosure of Invention

The invention aims to solve the problems that the prior art is simple in structure, inconvenient to carry out simple installation and detection during detection and complicated to detect, and provides a direct-current magnetic bias detection device capable of overcoming alternating-current magnetic field interference.

In order to achieve the purpose, the invention adopts the following technical scheme: the direct current magnetic bias detection device capable of overcoming the interference of the alternating current magnetic field comprises a box body, two rotating shafts are horizontally and symmetrically and rotatably connected in the box body, rotating blocks are symmetrically and fixedly connected on the two rotating shafts respectively, the upper end of each rotating block far away from the rotating shaft extends to the upper part of the box body, the upper end of the box body is symmetrically provided with two first detection rings and two second detection rings, each first detection ring and each second detection ring are arranged oppositely, each first detection ring and each second detection ring are fixed on the rotating block, one end of each second detection ring is provided with a fixing mechanism, and each second detection ring is connected with the first detection ring through a detection mechanism, each lower end of the rotating block is fixedly connected with a connecting rod, each lower end of the connecting rod is fixedly connected with a worm wheel, a driving mechanism is arranged in the box body, and the driving mechanism is connected with the worm wheel.

In the above direct current magnetic biasing detection device capable of overcoming the interference of the alternating current magnetic field, the driving mechanism includes a first worm and a second worm which are symmetrically and rotatably connected in the box body, the first worm and the second worm are respectively engaged with the worm wheel, a driving rod is rotatably connected in the box body, one end of the driving rod extends to the outer side of the box body, a first bevel gear and a second bevel gear are fixedly connected on the driving rod, a third bevel gear and a fourth bevel gear are respectively fixedly connected on the first worm and the second worm, the first bevel gear is engaged with the third bevel gear, the second bevel gear is engaged with the fourth bevel gear, a rotating button is arranged on the outer side wall of the box body, and the rotating button is fixed on the driving rod.

In foretell can overcome direct current magnetic biasing detection device of alternating current magnetic field interference, every fixed establishment includes every second and detects the fixed block of going up fixed connection, every the fixed slot has all been seted up to the one end of ring, and the one end that the second was kept away from to every fixed block all is located the fixed slot, every two recesses have all been seted up to equal symmetry on the lateral wall of fixed slot, every two springs of equal symmetry fixedly connected with in the recess are located two in same recess common fixedly connected with supports the piece on the spring, every two draw-in grooves have all been seted up to equal symmetry on the lateral wall of fixed block, and every supports the piece all be located the draw-in groove and with the draw-in groove block.

In the above dc magnetic bias detection device capable of overcoming the interference of the ac magnetic field, two moving grooves are symmetrically formed in the upper end of the box body, and the two rotating blocks at the same end of the two rotating shafts are located in the same moving groove.

In the above dc magnetic bias detecting device capable of overcoming the interference of the ac magnetic field, the two first detecting rings and the second detecting ring are fixedly connected to the interference preventing cover.

In the above dc magnetic bias detection device capable of overcoming the interference of the ac magnetic field, a wire is fixedly communicated with the side wall of each of the rotating blocks, two sliding holes are symmetrically formed in the side wall of the box body, and each wire extends into the box body through the sliding hole.

In the above dc magnetic bias detection device capable of overcoming the interference of the ac magnetic field, the first worm and the second worm are symmetrically and rotatably connected with two support blocks, and one end of each support block, which is far away from the first worm, is fixedly connected to the inner bottom wall of the box body.

In the above dc magnetic bias detection device capable of overcoming the interference of the ac magnetic field, the inner side wall of the box body is further fixedly connected with a stabilization block, each stabilization block is fixed between the first worm and the second worm, and the stabilization block is sleeved on the driving rod and is rotatably connected with the driving rod.

Compared with the prior art, the direct current magnetic bias detection device capable of overcoming the interference of the alternating current magnetic field has the advantages that:

(1) by arranging the turn knob, the driving rod, the first worm, the second worm, the first bevel gear, the second bevel gear, the third bevel gear, the fourth bevel gear, the first worm gear, the second worm gear, the first detection ring and the second detection ring, the drive rod is driven by the turn knob to drive the first worm and the second worm to rotate through the first bevel gear and the second bevel gear, so that the first detection ring and the second detection ring can be driven to detect an object more conveniently;

(2) through setting up supporting shoe and steady piece, can make first worm, second worm, actuating lever carry out more stable rotation, make its first detection ring of drive and second detect the ring and detect the more convenient detection of object.

(3) Interference of an alternating current magnetic field can be better overcome by arranging the interference prevention cover;

in conclusion, the invention has the advantages of stable structure, simple operation, scientific and reasonable design, short production period, and convenient and simple installation and detection during detection, so that the detection is simpler.

Drawings

FIG. 1 is a schematic structural diagram of a DC magnetic bias detection device capable of overcoming AC magnetic field interference according to the present invention;

FIG. 2 is a side view of a DC magnetic bias detecting device capable of overcoming AC magnetic field interference according to the present invention;

FIG. 3 is a schematic structural diagram of a fixing mechanism of the DC magnetic bias detection device capable of overcoming the interference of the AC magnetic field according to the present invention;

fig. 4 is a schematic structural diagram of an outer surface of a box of the dc magnetic bias detection apparatus capable of overcoming interference of an ac magnetic field according to the present invention.

In the figure: the device comprises a box body 1, a rotating button 2, a supporting block 3, a first worm 4, a driving rod 5, a third bevel gear 6, a lead wire 7, a rotating block 8, a first bevel gear 9, a rotating shaft 10, a stabilizing block 11, a fourth bevel gear 12, a connecting rod 13, a worm gear 14, a second bevel gear 15, a second worm 16, a first detection ring 17, an interference preventing cover 18, a second detection ring 19, a fixed block 20, a spring 21, a groove 22, a supporting block 23 and a sliding hole 24.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Examples

Referring to fig. 1-4, the direct current magnetic bias detection device capable of overcoming the interference of the alternating current magnetic field comprises a box body 1, two rotating shafts 10 are horizontally and symmetrically and rotatably connected in the box body 1, rotating blocks 8 are respectively and symmetrically and fixedly connected to the two rotating shafts 10, the upper end of each rotating block 8, far away from the rotating shaft 10, extends to the upper side of the box body 1, two moving grooves are symmetrically formed in the upper end of the box body 1, and the two rotating blocks 8 at the same end of the two rotating shafts 10 are located in the same moving groove; the upper end of the box body 1 is symmetrically provided with two first detection rings 17 and two second detection rings 19, the detection principle of the first detection rings 17 and the second detection rings 19 is the prior art, which is not described in detail herein, and each first detection ring 17 and each second detection ring 19 are arranged oppositely;

each first detecting ring 17 and each second detecting ring 19 are fixed on the rotating block 8, one end of each second detecting ring 19 is provided with a fixing mechanism, each second detecting ring 19 is connected with the first detecting ring 17 through a detecting mechanism, the two first detecting rings 17 and the second detecting ring 19 are fixedly connected with an anti-interference cover 18 together, the anti-interference cover 18 is made of a conductive rubber gasket, the two anti-interference covers 18 are driven by the first detecting ring 17 and the second detecting ring 19 to be closed, a sealed conductive rubber gasket ring is formed on a line body to be detected, so that the electromagnetic field connection between the first detecting ring 17 and the second detecting ring 19 can be better blocked, the electromagnetic interference caused by the detection of the line body by the first detecting ring 17 and the second detecting ring 19 can be overcome, wherein the working principle of the conductive rubber gasket is mature prior art and is not elaborated herein, the interference prevention cover 18 can prevent the first detection ring 17 and the second detection ring 19 from being affected during detection; the lower end of each rotating block 8 is fixedly connected with a connecting rod 13, the lower end of each connecting rod 13 is fixedly connected with a worm wheel 14, and a driving mechanism is arranged in the box body 1 and connected with the worm wheel 14;

the driving mechanism comprises a first worm 4 and a second worm 16 which are symmetrically and rotatably connected in a box body 1, the first worm 4 and the second worm 16 are respectively meshed with a worm wheel 14, a driving rod 5 is rotatably connected in the box body 1, one end of the driving rod 5 extends to the outer side of the box body 1, a first bevel gear 9 and a second bevel gear 15 are fixedly connected to the driving rod 5, a third bevel gear 6 and a fourth bevel gear 12 are respectively fixedly connected to the first worm 4 and the second worm 16, the first bevel gear 9 is meshed with the third bevel gear 6, the second bevel gear 15 is meshed with the fourth bevel gear 12, a knob 2 is arranged on the outer side wall of the box body 1, the knob 2 is fixed on the driving rod 5, and the first detection ring 17 and the second detection ring 19 can be driven to be opened and closed through the knob 2, so that detection can be more conveniently carried out;

each fixing mechanism comprises a fixing block 20 fixedly connected to each second detection ring 19, a fixing groove is formed in one end of each first detection ring 17, one end, far away from the second detection ring 19, of each fixing block 20 is located in the fixing groove, two grooves 22 are symmetrically formed in the side wall of each fixing groove, two springs 21 are symmetrically and fixedly connected to each groove 22, abutting blocks 23 are fixedly connected to the two springs 21 located in the same groove 22, two clamping grooves are symmetrically formed in the side wall of each fixing block 20, each abutting block 23 is located in each clamping groove and clamped with the corresponding clamping groove, the abutting blocks 23 are pushed to be fixed in the clamping grooves through sliding holes 21, and the second detection ring 19 can be fixedly connected with the first detection ring 17 through the fixing blocks 20;

the side wall of each rotating block 8 is fixedly communicated with a lead 7, the side wall of the box body 1 is symmetrically provided with two sliding holes 24, each lead 7 extends into the box body 1 through the sliding hole 24, the lead 7 is connected with a detector, and the working principle that the first detection ring 17 and the second detection ring 19 transmit data through the lead 7 is the prior art and is not elaborated herein;

the first worm 4 and the second worm 16 are symmetrically and rotatably connected with two supporting blocks 3, and one end of each supporting block 3, which is far away from the first worm 4, is fixedly connected to the inner bottom wall of the box body 1; still fixedly connected with stabilizing block 11 on the inside wall of box 1, and every stabilizing block 11 all fixes between first worm 4 and second worm 16, and stabilizing block 11 cover is established on actuating lever 5 and is rotated with actuating lever 5 and be connected, can be better support first worm 4 and second worm 16, actuating lever 5 for first worm 4 and second worm 16, actuating lever 5 can be better rotate.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

In the invention, when detection is needed, a rotating knob 2 fixed on a driving rod 5 is rotated, so that the rotating knob 2 drives a first bevel gear 9 and a second bevel gear 15 fixed on the driving rod 5 to rotate on a stabilizing block 11, the first bevel gear 9 and the second bevel gear 15 are engaged with a third bevel gear 6 and a fourth bevel gear 12 on a first worm 4 and a second worm 16, so that the first worm 4 and the second worm 16 rotate on a supporting block 3, the first worm 4 and the second worm 16 can drive a worm wheel 14 at the upper ends of the first worm 4 and the second worm 16 to move on the supporting block 3, then the worm wheel 14 drives a rotating block 8 to move on a rotating shaft 10 through a connecting rod 13, further, a first detection ring 17 and a second detection ring 19 on the rotating block 8 can be driven to separate an anti-interference cover 18, and then an object to be detected is placed between the two first detection rings 17 and the second detection ring 19, then, the rotating button 2 drives the driving rod 5 to drive the rotating block 8 to rotate on the rotating shaft 10, so that the two first detecting rings 17 and the second detecting ring 19 drive the interference preventing cover 18 to close on the object, and the first detecting ring 17 and the second detecting ring 19 can detect.

Although the terms of the case 1, the rotating knob 2, the supporting block 3, the first worm 4, the driving rod 5, the third bevel gear 6, the wire 7, the rotating block 8, the first bevel gear 9, the rotating shaft 10, the stabilizing block 11, the fourth bevel gear 12, the connecting rod 13, the worm wheel 14, the second bevel gear 15, the second worm 16, the first detecting ring 17, the interference preventing cover 18, the second detecting ring 19, the fixing block 20, the spring 21, the groove 22, the abutting block 23, the sliding hole 24, etc. are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The direct current magnetic biasing detection device capable of overcoming the interference of the alternating current magnetic field comprises a box body (1) and is characterized in that two rotating shafts (10) are horizontally and symmetrically connected in the box body (1) in a rotating mode, the two rotating shafts (10) are respectively and fixedly connected with rotating blocks (8) in a symmetrical mode, the upper end, far away from the rotating shafts (10), of each rotating block (8) extends to the upper portion of the box body (1), two first detection rings (17) and two second detection rings (19) are symmetrically arranged at the upper end of the box body (1), each first detection ring (17) and each second detection ring (19) are oppositely arranged, each first detection ring (17) and each second detection ring (19) are fixed on the rotating blocks (8), one end of each second detection ring (19) is provided with a fixing mechanism, and each second detection ring (19) is connected with the first detection ring (17) through a detection mechanism, the lower end of each rotating block (8) is fixedly connected with a connecting rod (13), the lower end of each connecting rod (13) is fixedly connected with a worm wheel (14), a driving mechanism is arranged in the box body (1), and the driving mechanism is connected with the worm wheel (14);

the driving mechanism comprises a first worm (4) and a second worm (16) which are symmetrically and rotationally connected in the box body (1), the first worm (4) and the second worm (16) are respectively meshed with the worm wheel (14), a driving rod (5) is rotationally connected in the box body (1), one end of the driving rod (5) extends to the outer side of the box body (1), a first bevel gear (9) and a second bevel gear (15) are fixedly connected on the driving rod (5), a third bevel gear (6) and a fourth bevel gear (12) are respectively fixedly connected to the first worm (4) and the second worm (16), the first bevel gear (9) is meshed with the third bevel gear (6), the second bevel gear (15) is meshed with the fourth bevel gear (12), the outer side wall of the box body (1) is provided with a rotating button (2), and the rotating button (2) is fixed on the driving rod (5);

the two first detection rings (17) and the second detection ring (19) are fixedly connected with an anti-interference cover (18) together; the anti-interference cover (18) is made of a conductive rubber gasket;

when needs examine, drive actuating lever (5) by knob (2) and drive turning block (8) and rotate in pivot (10), and then drive first detection ring (17) on turning block (8) and second detection ring (19) and drive jam-proof cover (18) and close, form a sealed electrically conductive rubber gasket ring on the line body that needs to detect, thereby block the electromagnetic field connection between first detection ring (17) and second detection ring (19), overcome first detection ring (17) and second detection ring (19) and examine the electromagnetic interference of time measuring at the line body.

2. The device for detecting the DC magnetic bias capable of overcoming the interference of the AC magnetic field according to claim 1, wherein each fixing mechanism comprises a fixing block (20) fixedly connected to each second detection ring (19), a fixing groove is formed in one end of each first detection ring (17), one end of each fixing block (20) far away from the second detection ring (19) is located in the fixing groove, two grooves (22) are symmetrically formed in a side wall of each fixing groove, two springs (21) are symmetrically and fixedly connected to each groove (22), two abutting blocks (23) are fixedly connected to two springs (21) located in the same groove (22) in a common mode, two clamping grooves are symmetrically formed in a side wall of each fixing block (20), and each abutting block (23) is located in and clamped with the clamping groove.

3. The device for detecting DC magnetic bias capable of overcoming interference of AC magnetic field according to claim 1, wherein two moving slots are symmetrically formed at the upper end of the box body (1), and two rotating blocks (8) at the same end of the two rotating shafts (10) are located in the same moving slot.

4. The direct-current magnetic bias detection device capable of overcoming the interference of the alternating-current magnetic field according to claim 1, wherein a lead (7) is fixedly communicated with a side wall of each rotating block (8), two sliding holes (24) are symmetrically formed in the side wall of the box body (1), and each lead (7) extends into the box body (1) through the sliding hole (24).

5. The direct current magnetic bias detection device capable of overcoming the interference of the alternating current magnetic field according to claim 1, wherein the first worm (4) and the second worm (16) are symmetrically and rotatably connected with two support blocks (3), and one end of each support block (3) far away from the first worm (4) is fixedly connected to the inner bottom wall of the box body (1).

6. The direct-current magnetic bias detection device capable of overcoming the interference of the alternating-current magnetic field according to claim 1, wherein a stabilizing block (11) is further fixedly connected to the inner side wall of the box body (1), each stabilizing block (11) is fixed between the first worm (4) and the second worm (16), and the stabilizing block (11) is sleeved on the driving rod (5) and is rotatably connected with the driving rod (5).