CN111430101A - Lightning protection dry-type transformer - Google Patents

Abstract

The invention belongs to the technical field of transformer equipment, in particular to a lightning protection dry-type transformer, comprising a transformer protection base box, a surface of the transformer protection base box is movably installed with a protection box door through a rotating shaft, and a surface of the protection box door is movably installed on the surface of the transformer protection base box. With observation window. By setting the transformer protection base box, on the one hand, the lightning can be guided by the lightning rod. At the top of the lightning rod, a space where the local electric field is concentrated is formed, so as to influence the development direction of the lightning pilot discharge, guide the lightning to discharge to the lightning rod, and then pass the lightning conductor frame, Conductive strips and grounded conductive posts introduce lightning current into the ground, so that dry-type transformers are protected from lightning strikes. On the other hand, by setting lightning arresters, lightning and high voltage can be effectively prevented through lightning arresters, and the equipment can be protected. When there is lightning and high voltage When the spark gap is broken down, the resistance value of the arrester valve resistance decreases, and the lightning current is introduced into the ground, which protects the dry-type transformer from the damage of the lightning current.

Description

Lightning protection dry-type transformer

technical field

The invention belongs to the technical field of transformer equipment, and in particular relates to a lightning protection dry-type transformer.

Background technique

Dry-type transformers are widely used in local lighting, high-rise buildings, airports, terminal CNC machinery and equipment, etc. Simply speaking, dry-type transformers refer to transformers whose iron cores and windings are not immersed in insulating oil. The cooling methods are divided into natural air cooling and Forced air cooling, natural air cooling, the transformer can run continuously for a long time under the rated capacity, and forced air cooling, the output capacity of the transformer can be increased by 50%, suitable for intermittent overload operation, or emergency overload operation; due to overload The load loss and impedance voltage increase greatly, and it is in a non-economic operation state, so it should not be in continuous overload operation for a long time.

However, most of the existing dry-type transformers are not equipped with lightning protection measures. Even if lightning protection measures are installed on the transformer, the performance of the lightning protection device is generally poor, and the lightning protection device is weak. And low-voltage coils are often damaged due to excessive instantaneous current and voltage, and even cause power outages, or fire accidents due to lightning.

SUMMARY OF THE INVENTION

In order to solve the problems raised in the above background art. The invention provides a lightning protection dry-type transformer, which solves the problem that the lightning protection device of the existing dry-type transformer is weak and is easily affected by lightning and causes accidents.

In order to achieve the above purpose, the present invention provides the following technical solutions: a lightning protection dry-type transformer, comprising a transformer protection base box, a surface of the transformer protection base box is movably installed with a protection box door through a rotating shaft, and a protection box door is movably installed on the surface of the transformer protection base box. The surface is provided with an observation window, the top of the transformer protection base box is provided with a lightning conductor frame, the top of the lightning conductor frame is provided with a lightning rod, the inside of the transformer protection base box is provided with a support base, and one of the support bases is provided. The side is provided with a coil protective casing, the top of the coil protective casing is provided with an iron core, one side of the iron core is provided with a connecting clip, one side of the connecting clip is provided with an installation support frame, and the installation support A surge arrester is installed on one side of the frame, one end of the surge arrester is connected with a current lead, and a winding end is arranged below the surge arrester.

Preferably, an exhaust fan hot window is provided on one side of the transformer protection base box, and a dust-proof wind deflector is provided on the inner side of the exhaust fan hot window.

Preferably, the outer shape of the lightning rod structure is composed of an elliptical structure that decreases in sequence.

Preferably, one side of the lightning conductor frame is provided with a conductive strip, and one end of the conductive strip is connected with a grounding conductive column.

Preferably, the other side of the support base is provided with fans, and the number of the fans is six, which are divided into two groups and installed on both sides of the support base respectively.

Preferably, the arrester is a valve-type arrester.

Compared with the prior art, the beneficial effects of the present invention are:

By setting the transformer protection base box, on the one hand, the lightning can be guided by the lightning rod, and at the top of the lightning rod, a space where the local electric field is concentrated is formed to affect the development direction of the lightning pilot discharge, guide the lightning to discharge to the lightning rod, and then pass the lightning conductor frame, Conductive strips and grounded conductive posts introduce lightning current into the ground, so that dry-type transformers are protected from lightning strikes. On the other hand, by setting lightning arresters, lightning arresters can effectively prevent lightning and high voltage, and protect equipment. When there is lightning high voltage When the spark gap is broken down, the resistance value of the arrester valve resistance decreases, and the lightning current is introduced into the ground, which protects the dry-type transformer from the damage of the lightning current. Under normal circumstances, the spark gap will not be struck. Wear, the resistance value of the arrester valve plate resistance is high, which will not affect the normal communication of the communication line.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the first three-dimensional structure diagram of the present invention;

Fig. 2 is the second kind of three-dimensional structure diagram of the present invention;

Fig. 3 is the third three-dimensional structure diagram of the present invention;

4 is a cross-sectional view of a three-dimensional structure of the present invention;

FIG. 5 is a three-dimensional structural diagram of the dry-type transformer of the present invention.

In the picture: 1 Transformer protection base box; 2 Exhaust fan hot window; 3 Protection box door; 4 Observation window; 5 Lightning conductor frame; 6 Lightning rod; 7 Conductive tape; Shell; 12 iron core; 13 connecting clip; 14 mounting support frame; 15 arrester; 16 current lead; 17 winding end.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-5, the present invention provides the following technical solutions: a lightning protection dry-type transformer, comprising a transformer protection base box 1, the surface of the transformer protection base box 1 is movably installed with a protection box door 3 through a rotating shaft, and the protection box door The surface of the 3 is provided with an observation window 4. By setting the observation window 4, the interior of the transformer protection base box 1 can be easily observed. The top of the transformer protection base box 1 is provided with a lightning conductor frame 5, and the top of the lightning conductor frame 5 is provided with a Lightning rod 6, by setting transformer protection base box 1, on the one hand, lightning can be guided through lightning rod 6, and at the top of lightning rod 6, a space for local electric field concentration is formed, so as to influence the development direction of lightning pilot discharge and guide lightning to discharge to lightning rod 6 , the inside of the transformer protection base box 1 is provided with a support base 9, one side of the support base 9 is provided with a coil protective casing 11, the top of the coil protective casing 11 is provided with an iron core 12, and one side of the iron core 12 is provided with a connecting clip 13. An installation support frame 14 is installed on one side of the connecting clip 13, and a lightning arrester 15 is installed on one side of the installation support frame 14. By setting the lightning arrester 15, the lightning arrester 15 can effectively prevent lightning and high voltage, and protect the equipment , When there is a high voltage of lightning, the spark gap is broken down, the resistance value of the valve plate resistance of the arrester 15 drops, and the lightning current is introduced into the ground, which protects the dry-type transformer from the harm of lightning current. The spark gap will not be broken down, and the resistance value of the valve plate resistance of the arrester 15 is high, which will not affect the normal communication of the communication line. One end of the arrester 15 is connected with the current lead 16, and the lower part of the arrester 15 is provided with a winding end 17.

Specifically, one side of the transformer protection base box 1 is provided with an exhaust fan hot window 2, and the inner side of the exhaust fan hot window 2 is provided with a dust-proof wind guide plate. By setting the exhaust fan hot window 2, the heat generated inside the transformer protection base box 1 can be protected It is discharged to achieve the effect of cooling by exchanging with the outside air, and the dust-proof wind deflector provided at the same time can effectively play the role of dust-proof protection and reduce dust from entering the inside of the transformer protection base box 1 .

Specifically, the structural shape of the lightning rod 6 is composed of an oval structure with successively decreasing order. By designing the lightning rod 6 to be a sub-decreasing oval structure, the lightning rod 6 can be effectively supported, which is more stable than the traditional lightning rod 6. use effect.

Specifically, one side of the lightning conductor frame 5 is provided with a conductive strip 7, and one end of the conductive strip 7 is connected to a grounded conductive column 8. When discharging through the top of the lightning rod 6, a space for local electric field concentration is formed, so as to affect the lightning pilot discharge. In the development direction, the lightning current is introduced into the ground through the lightning conductor frame 5, the conductive strip 7 and the grounding conductive column 8, so that the dry-type transformer is protected from lightning strikes.

Specifically, the other side of the support base 9 is provided with fans 10, and the number of fans 10 is six, which are divided into two groups and installed on both sides of the support base 9. By arranging the fans 10, the base box 1 can be protected from the transformer. The internal air is exhausted for heat dissipation.

Specifically, the arrester 15 is a valve-type arrester. The valve-type arrester is composed of a spark gap and a valve plate resistance. The valve plate resistance is made of special silicon carbide. The valve plate resistance made of silicon carbide can effectively prevent lightning and high voltage. Protect the device.

The working principle and use process of the present invention: after the present invention is installed, the lightning can be guided through the lightning rod 6, and at the top of the lightning rod 6, a space where the local electric field is concentrated is formed, so as to influence the development direction of the lightning pilot discharge and guide the lightning to the lightning rod. 6 Discharge, and then the lightning current is introduced into the ground through the lightning conductor frame 5, the conductive strip 7 and the grounding conductive column 8, so that the dry-type transformer is prevented from being struck by lightning. By setting the lightning arrester 15, the lightning arrester 15 can effectively prevent lightning and high voltage , to protect the equipment. When there is a high voltage of lightning, the spark gap is broken down, the resistance value of the 15 valve plate resistance of the arrester drops, and the lightning current is introduced into the ground, which protects the dry-type transformer from the harm of lightning current. Under normal circumstances, the spark gap will not be broken down, and the resistance value of the valve plate resistance of the arrester 15 is relatively high, which will not affect the normal communication of the communication line.

Finally, it should be noted that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. Lightning protection dry-type transformer, comprising a transformer protection base box (1), characterized in that: the surface of the transformer protection base box (1) is movably installed with a protection box door (3) through a rotating shaft, and the protection box door The surface of (3) is provided with an observation window (4), the top of the transformer protection base box (1) is provided with a lightning conductor frame (5), and the top of the lightning conductor frame (5) is provided with a lightning rod (6), A support base (9) is provided inside the transformer protection base box (1), a coil protection shell (11) is provided on one side of the support base (9), and a top of the coil protection shell (11) is provided with An iron core (12), one side of the iron core (12) is provided with a connecting clip (13), one side of the connecting clip (13) is provided with an installation support frame (14), the installation support frame A surge arrester (15) is installed on one side of (14), one end of the surge arrester (15) is connected with a current lead (16), and a winding end (17) is provided below the surge arrester (15). 2. The lightning protection dry-type transformer according to claim 1, characterized in that: one side of the transformer protection base box (1) is provided with an exhaust fan hot window (2), and the inner side of the exhaust fan hot window (2) Equipped with dust-proof wind deflector. 3 . The lightning protection dry-type transformer according to claim 1 , wherein the lightning rod ( 6 ) is composed of an elliptical structure with successively decreasing structural shapes. 4 . 4. The lightning protection dry-type transformer according to claim 1, characterized in that: one side of the lightning protection conductor frame (5) is provided with a conductive strip (7), and one end of the conductive strip (7) is connected with a grounding Conductive pillars (8). 5. The lightning protection dry-type transformer according to claim 1, characterized in that: the other side of the support base (9) is provided with a fan (10), and the number of the fan (10) is six, and the number of the fan (10) is six. It is divided into two groups and installed on both sides of the support base (9). 6 . The lightning protection dry-type transformer according to claim 1 , wherein the lightning arrester ( 15 ) is a valve-type lightning arrester. 7 .

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