Magnetic quenching discharge gap device

Abstract

The utility model relates to the technical field of arc extinguishing discharge gap devices, in particular to a magnetic blow-out arc extinguishing discharge gap device, which comprises a high-voltage lead electrode, a grounding lead electrode and a magnetic blow-out discharge gap, the outer side of the high-voltage lead electrode is fixedly connected with a first connecting piece, and the lower end of the first connecting piece is fixedly connected with a first insulating plate. By arranging the magnetic blow-out iron core and the magnetic blow-out winding, when the magnetic blow-out discharge gap is subjected to disruptive discharge, the formed current passes through the magnetic blow-out winding on the magnetic blow-out iron core, so that the magnetic blow-out iron core is magnetized, the magnetized magnetic blow-out iron core has a relatively uniform magnetic field at the opening, the magnetic field acts on an electric arc, charged particles in the electric arc deviate in the magnetic field, and the magnetic blow-out discharge gap is subjected to disruptive discharge. The arc is bent, the path of the arc is increased, the arc can be extinguished early, a system is separated from an abnormal state as soon as possible, the service life of the magnetic blow-out discharge gap is prolonged, system oscillation caused by arc jumping is reduced, and a power system can operate safely.

Description

Technical Field

[0001] The utility model relates to the technical field of arc extinguishing discharge gap devices, in particular to a magnetic blowing arc extinguishing discharge gap device. Background Art

[0002] The commonly used gap discharge device has only two discharge electrodes, usually a hemispherical rod gap. This type of gap discharge voltage is relatively concentrated, the structure is simple, and the cost is low. When the gap is broken down by the system overvoltage, it can quickly discharge the system abnormality, thereby protecting the system from damage by abnormal energy.

[0003] During actual production and use, we found that when the gap is broken down and the discharge circuit is established, the voltage at both ends of the gap drops rapidly. Even if the overvoltage release in the system is nearing the end or has been completely released, the arc between the gaps will still continue, making it impossible for the system to get out of the abnormal state as soon as possible. This phenomenon will seriously affect the life of the gap. At the same time, the jumping arc can easily cause system oscillations and endanger the safe operation of the power system. Therefore, in response to the above problems, we proposed a magnetic arc extinguishing discharge gap device. Utility Model Content

[0004] The utility model aims to provide a magnetic blow-out arc discharge gap device to solve the problem that in actual production and use, when the gap is broken down and a discharge circuit is established, the voltage at both ends of the gap decreases rapidly. Even if the overvoltage release in the system is nearing the end or has been completely released, the arc between the gaps will still continue, making it impossible for the system to get out of the abnormal state as soon as possible. This phenomenon will seriously affect the life of the gap. At the same time, the jumping arc is likely to cause system oscillations, endangering the safe operation of the power system.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A magnetic blown arc extinguishing discharge gap device comprises a high-voltage lead electrode, a grounded lead electrode and a magnetic blown discharge gap, wherein a first connecting piece is fixedly connected to the outer side of the high-voltage lead electrode, a first insulating plate is fixedly connected to the lower end of the first connecting piece, a threaded support rod is spirally connected to the inner side of the first insulating plate, a second insulating plate is spirally connected to the outer side of the threaded support rod, a second connecting piece is fixedly connected to the upper end of the second insulating plate, a grounded lead electrode is fixedly connected to the inner side of the second connecting piece, a third insulating plate is spirally connected to the outer side of the threaded support rod, a rubber column is fixedly connected to the upper end of the third insulating plate, an anti-skid pad is fixedly connected to the upper end of the rubber column, a magnetic blown iron core is placed on the upper end of the anti-skid pad, a magnetic blown winding is wound around the outer side of the right end of the magnetic blown iron core, a third connecting piece is fixedly connected to the lower end of the second insulating plate, and connecting grooves are provided on the inner sides of the left and right ends of the third connecting piece.

[0007] Preferably, the high-voltage lead electrode is located directly above the ground lead electrode, the high-voltage lead electrode passes through the first insulating plate, the gap between the high-voltage lead electrode and the ground lead electrode is a magnetic blowout discharge gap, and the number of the first connecting parts is two.

[0008] Preferably, the number of the threaded support rods is four, the first insulating plate is located at the upper end of the second insulating plate, and the first insulating plate is located at the upper end of the magnetic blowing core.

[0009] Preferably, the second insulating plate is located at the upper end of the third insulating plate, the second insulating plate passes through the magnetic blowing core, the grounding lead electrode passes through the third connecting piece, the second insulating plate and the second connecting piece, the number of the rubber columns is two, and the number of the anti-slip pads is two.

[0010] Preferably, the magnetic blowing core is in the shape of a ring, an upper end of the magnetic blowing core is provided with an opening, and one end of the magnetic blowing winding passes through a connecting slot and fits tightly against the outer side of a grounding lead electrode.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, by arranging a magnetic blown core and a magnetic blown winding, when the magnetic blown discharge gap breaks down and discharges, the current formed passes through the magnetic blown winding on the magnetic blown core, so that the magnetic blown core is magnetized. The magnetized magnetic blown core has a relatively uniform magnetic field at the opening. This magnetic field acts on the arc, and the charged particles in the arc are offset in the magnetic field, so that the shape of the arc is bent, and the path of the arc is increased, so that the arc can be extinguished earlier, thereby allowing the system to get out of the abnormal state as soon as possible, extending the service life of the magnetic blown discharge gap, reducing the system oscillation caused by the arc jump, and the power system can operate safely. By arranging rubber columns and anti-skid pads, the rubber columns and anti-skid pads are both made of insulating materials and have a good supporting and buffering effect when the magnetic blown core vibrates slightly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the top view of the structure of the first insulating plate of the utility model;

[0015] Figure 3 This is a schematic diagram of the top view of the second insulating plate of the utility model;

[0016] Figure 4 This is a schematic diagram of the top view of the structure of the third insulating plate of the utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the third connecting member of the utility model in a top view;

[0018] Figure 6 This is a schematic diagram of the main structure of the magnetic blown iron core of the utility model;

[0019] Figure 7 It is a schematic diagram of the top view of the structure of the magnetic blowing core of the utility model.

[0020] In the figure: 1. high-voltage lead electrode; 2. first connecting piece; 3. first insulating plate; 4. threaded support rod; 5. second insulating plate; 6. second connecting piece; 7. grounding lead electrode; 8. magnetic blowing discharge gap; 9. third insulating plate; 10. rubber column; 11. anti-slip pad; 12. magnetic blowing iron core; 13. magnetic blowing winding; 14. third connecting piece; 15. connecting groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-7 , the utility model provides a technical solution:

[0023] A magnetic blown arc extinguishing discharge gap device comprises a high-voltage lead electrode 1, a grounded lead electrode 7 and a magnetic blown discharge gap 8, wherein a first connecting piece 2 is fixedly connected to the outer side of the high-voltage lead electrode 1, a first insulating plate 3 is fixedly connected to the lower end of the first connecting piece 2, a threaded support rod 4 is spirally connected to the inner side of the first insulating plate 3, a second insulating plate 5 is spirally connected to the outer side of the threaded support rod 4, a second connecting piece 6 is fixedly connected to the upper end of the second insulating plate 5, a grounded lead electrode 7 is fixedly connected to the inner side of the second connecting piece 6, a third insulating plate 9 is spirally connected to the outer side of the threaded support rod 4, a rubber column 10 is fixedly connected to the upper end of the third insulating plate 9, an anti-skid pad 11 is fixedly connected to the upper end of the rubber column 10, a magnetic blown iron core 12 is placed on the upper end of the anti-skid pad 11, a magnetic blown winding 13 is wound around the outer side of the right end of the magnetic blown iron core 12, a third connecting piece 14 is fixedly connected to the lower end of the second insulating plate 5, and connecting grooves 15 are provided on the inner sides of the left and right ends of the third connecting piece 14.

[0024] The high-voltage lead electrode 1 is located at the upper end of the ground lead electrode 7, and the high-voltage lead electrode 1 passes through the first insulating plate 3. The gap between the high-voltage lead electrode 1 and the ground lead electrode 7 is a magnetic blown discharge gap 8. There are two first connecting members 2. The outer side of the high-voltage lead electrode 1 is fixedly connected with the first connecting member 2. The lower end of the first connecting member 2 is fixedly connected with the first insulating plate 3. The inner side of the first insulating plate 3 is spirally connected with a threaded support rod 4. There are four threaded support rods 4. The first insulating plate 3 is located at the upper end of the second insulating plate 5. The first insulating plate 3 is located at the upper end of the magnetic blown iron core 12. The outer side of the threaded support rod 4 is spirally connected with The second insulating plate 5 is located at the upper end of the third insulating plate 9, the second insulating plate 5 passes through the magnetic blow core 12, the grounding lead electrode 7 passes through the third connecting piece 14, the second insulating plate 5 and the second connecting piece 6, there are two rubber columns 10, and there are two anti-skid pads 11. The upper end of the second insulating plate 5 is fixedly connected to the second connecting piece 6, and the inner side of the second connecting piece 6 is fixedly connected to the grounding lead electrode 7. The outer side of the threaded support rod 4 is spirally connected to the third insulating plate 9, and the upper end of the third insulating plate 9 is fixedly connected to the rubber column 10, which is convenient for setting the rubber column 10 and the anti-skid pad 11. The pads 11 are all made of insulating material and have a good supporting and buffering effect when the magnetic blown iron core 12 vibrates slightly; the upper end of the rubber column 10 is fixedly connected with the anti-skid pad 11, and the magnetic blown iron core 12 is placed on the upper end of the anti-skid pad 11, which is convenient for arranging the magnetic blown iron core 12 and the magnetic blown winding 13. When the magnetic blown discharge gap 8 breaks down and discharges, the current formed passes through the magnetic blown winding 13 on the magnetic blown iron core 12, so that the magnetic blown iron core 12 is magnetized. The magnetized magnetic blown iron core 12 has a relatively uniform magnetic field at the opening. This magnetic field acts on the arc, and the charged particles in the arc are offset in the magnetic field, causing the arc shape to bend. , increasing the arc path, so that the arc can be extinguished earlier, thereby allowing the system to get out of the abnormal state as soon as possible, extending the service life of the magnetic blowing discharge gap 8, reducing the system shock caused by arc jumping, and the power system can operate safely; the magnetic blowing core 12 has a circular shape, and an opening is provided at the upper end of the magnetic blowing core 12. One end of the magnetic blowing winding 13 passes through the connecting groove 15 and fits tightly with the outer side of the grounding lead electrode 7. The magnetic blowing winding 13 is wound around the outer side of the right end of the magnetic blowing core 12, and the third connecting piece 14 is fixedly connected to the lower end of the second insulating plate 5. The third connecting piece 14 has connecting grooves 15 on the inner sides of the left and right ends.

[0025] Working process: When the device is in use, the high-voltage lead electrode 1 is responsible for connecting the high-voltage lead and serving as the high-voltage discharge upper electrode of the magnetic blown discharge gap 8. The outer side of the high-voltage lead electrode 1 is fixedly connected with a first connector 2, and the lower end of the first connector 2 is fixedly connected with a first insulating plate 3. The first insulating plate 3 insulates the charged body from irrelevant parts such as the magnetic blown iron core 12. The inner side of the first insulating plate 3 is spirally connected with a threaded support rod 4, and the outer side of the threaded support rod 4 is spirally connected with a second insulating plate 5, and the upper end of the second insulating plate 5 is fixedly connected with a second connector 6. The second connecting member 6 is fixedly connected to the inner side with a grounding lead electrode 7, which is responsible for connecting the lead wire of the grounding end and serving as the high-voltage discharge lower electrode of the magnetic blowing discharge gap 8. The lower end of the second insulating plate 5 is fixedly connected to a third connecting member 14, and the outer side of the threaded support rod 4 is spirally connected to a third insulating plate 9. The upper end of the third insulating plate 9 is fixedly connected to a rubber column 10, and the upper end of the rubber column 10 is fixedly connected to an anti-skid pad 11. The rubber column 10 and the anti-skid pad 11 are both made of insulating materials and have good support and buffering when the magnetic blowing iron core 12 vibrates slightly. The anti-slip pad 11 is provided with a magnetic blow core 12 on the upper end, and a magnetic blow winding 13 is wound around the outer side of the right end of the magnetic blow core 12. The third connecting member 14 is provided with connecting grooves 15 on the inner sides of the left and right ends. One end of the magnetic blow winding 13 passes through the connecting groove 15 and fits tightly with the outer side of the ground lead electrode 7. The other end of the magnetic blow winding 13 is grounded to form a complete current loop, so that the system can discharge to the ground through the magnetic blow discharge gap 8. When the overvoltage breaks through the magnetic blow discharge gap 8, the current flows through the magnetic blow winding 13, and a magnetic field is generated in the magnetic blow winding 13. The magnetic field reaches the opening along the path of the magnetic blowing core 12, and forms a relatively uniform magnetic field at the opening. This magnetic field acts on the path of the discharge arc, and the charged particles in the arc are deflected in the magnetic field, which increases the path of the arc. The greater the current, the greater the magnetic field strength, and the greater the force of the magnetic field on the arc. The arc extinguishing effect is very good, so that the arc can be extinguished earlier, and then the system can get out of the abnormal state as soon as possible, extending the service life of the magnetic blowing discharge gap 8, reducing the system oscillation caused by arc jumping, and the power system can operate safely.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetic blowout arc extinguishing discharge gap device, comprising a high voltage lead electrode (1), a ground lead electrode (7) and a magnetic blowout discharge gap (8), characterized in that: The high-voltage lead electrode (1) is fixedly connected to a first connecting piece (2) at its outer side, a first insulating plate (3) is fixedly connected to the lower end of the first connecting piece (2), a threaded support rod (4) is spirally connected to the inner side of the first insulating plate (3), a second insulating plate (5) is spirally connected to the outer side of the threaded support rod (4), a second connecting piece (6) is fixedly connected to the upper end of the second insulating plate (5), a grounding lead electrode (7) is fixedly connected to the inner side of the second connecting piece (6), a third insulating plate (9) is spirally connected to the outer side of the threaded support rod (4), a rubber column (10) is fixedly connected to the upper end of the third insulating plate (9), an anti-skid pad (11) is fixedly connected to the upper end of the rubber column (10), a magnetic blown iron core (12) is placed at the upper end of the anti-skid pad (11), a magnetic blown winding (13) is wound around the right end of the magnetic blown iron core (12), a third connecting piece (14) is fixedly connected to the lower end of the second insulating plate (5), and connection grooves (15) are provided on the inner sides of left and right ends of the third connecting piece (14).

2. A magnetic blow-out arc discharge gap device according to claim 1, characterized in that: The high-voltage lead electrode (1) is located directly above the ground lead electrode (7), the high-voltage lead electrode (1) passes through the first insulating plate (3), the gap between the high-voltage lead electrode (1) and the ground lead electrode (7) is a magnetic blowout discharge gap (8), and the number of the first connecting members (2) is two.

3. A magnetic blow-out arc-extinguishing discharge gap device according to claim 1, characterized in that: The number of the threaded support rods (4) is four, the first insulating plate (3) is located at the upper end of the second insulating plate (5), and the first insulating plate (3) is located at the upper end of the magnetic blown iron core (12).

4. A magnetic blow-out arc discharge gap device according to claim 1, characterized in that: The second insulating plate (5) is located at the upper end of the third insulating plate (9), the second insulating plate (5) passes through the magnetic blow core (12), the ground lead electrode (7) passes through the third connecting piece (14), the second insulating plate (5) and the second connecting piece (6), the number of the rubber columns (10) is two, and the number of the anti-slip pads (11) is two.

5. A magnetic blow-out arc-extinguishing discharge gap device according to claim 1, characterized in that: The magnetic blowing core (12) has a circular ring shape, an upper end of the magnetic blowing core (12) is provided with an opening, and one end of the magnetic blowing winding (13) passes through a connecting groove (15) and is tightly fitted to the outer side of the grounding lead electrode (7).

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