CN214796879U - Conducting rod, high-voltage bushing and high-voltage power transmission equipment - Google Patents

Abstract

The utility model discloses a conducting rod, high-tension bushing and high-tension transmission equipment relates to high-tension transmission technical field, can improve the heat exchange efficiency of conducting rod, guarantees that the inside temperature of conducting rod is normal. The first end of the conducting rod of the utility model is provided with an air inlet and an air outlet; the air duct is formed in the conducting rod and comprises an air inlet air duct and an air outlet air duct, the first end of the air inlet air duct is communicated with the air inlet, the first end of the air outlet air duct is communicated with the air outlet, and the second end of the air inlet air duct is communicated with the second end of the air outlet air duct at the second end of the conducting rod. The utility model discloses a conducting rod, high-tension bushing and high-tension transmission equipment are used for high-tension transmission.

Description

Conducting rod, high-voltage bushing and high-voltage power transmission equipment

Technical Field

The utility model relates to a high-tension transmission technical field especially relates to a conducting rod, high-tension bushing and high-tension transmission equipment.

Background

In the power industry, insulation between high-voltage equipment and adjacent equipment or buildings needs to be considered, a high-voltage bushing is a common connecting conductor in the high-voltage equipment, and mainly comprises an internal conducting rod which plays a role in conducting and carrying current, and an insulating sleeve with a certain thickness wraps the outside of the high-voltage equipment to ensure that the high-voltage equipment is not punctured and plays an insulating role. As shown in fig. 1, an insulating sleeve 02 is disposed outside the conductive rod 01, and one end of the conductive rod 01 is open while the other end is closed.

In practical applications, the conductive rod needs to withstand high voltage and large current, and a certain amount of heat is generated inside the high-voltage bushing. When the temperature of the conducting rod is reduced by adopting a natural cooling method, the conducting rod needs to be cooled by utilizing the flow of air inside the conducting rod. However, since the hot air in the conventional conductive rod and the cold air outside flow in and out from one opening, the incoming air and the outgoing air interfere with each other at the opening, and the mutual airflow is affected. So that the cool air entering the inside is reduced. Meanwhile, the heat inside the conductive rod cannot be dissipated in time, so that the heat dissipation efficiency is low, the heat is accumulated in the conductive rod, and the temperature inside the conductive rod is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a conducting rod, high-tension bushing and high-tension transmission equipment has solved the inside heat exchange efficiency of conducting rod among the prior art low, the too high problem of conducting rod bulk temperature.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in a first aspect, an embodiment of the present invention provides a conducting rod, which is characterized in that a first end of the conducting rod is provided with an air inlet and an air outlet; the air duct is formed inside the conducting rod and comprises an air inlet duct and an air outlet duct, the first end of the air inlet duct is communicated with the air inlet, the first end of the air outlet duct is communicated with the air outlet, and the second end of the air inlet duct is communicated with the second end of the air outlet duct.

The embodiment of the utility model provides a conducting rod, be equipped with air intake and air outlet at the first end of conducting rod, the conducting rod is inside to be formed with air inlet duct and air outlet duct, and the air intake communicates with the first end of air inlet duct, and outside cold air can get into in the air inlet duct through the air intake; the second end of the air inlet duct and the second end of the air outlet duct are communicated at the second end of the conducting rod, and air in the air inlet duct enters the air outlet duct at the second end and then is discharged from the air outlet through the air outlet duct. Compared with the prior art, the embodiment of the utility model provides a conducting rod with cooling structure, through set up air intake and air outlet at the conducting rod, form air inlet duct and air-out wind channel in inside, external cold wind has in the air intake gets into the air inlet duct, then end and air-out wind channel intercommunication at the second in air inlet duct, carry out the heat transfer with the conducting rod in the air-out wind channel, and then take the heat out from the air outlet from the conducting rod is inside. The heat exchange efficiency inside the conducting rod is improved, and the temperature inside the conducting rod is not too high. Meanwhile, the air inlet and the air outlet are arranged at the first end of the conducting rod, so that the conducting rod is more conveniently distributed in high-voltage equipment, and relevant connection is conveniently carried out.

In a second aspect, an embodiment of the present invention provides a high voltage bushing, including conducting rod, insulating cover and air supply arrangement in the first aspect, air supply arrangement includes the fan, the fan is used for passing through the outside air the air intake is sent into in the wind channel in the conducting rod.

The embodiment of the utility model provides a high-voltage bushing because contain the conducting rod in the first aspect, can improve the inside heat exchange efficiency of conducting rod, guarantees that the inside temperature of conducting rod can not be too high, but also is provided with the fan, utilizes in the fan can blow into the conducting rod with outside wind for the air flows, further promotes the inside radiating efficiency of conducting rod.

In a third aspect, an embodiment of the present invention provides a high voltage transmission apparatus, comprising a converter transformer, a bus, a converter valve and a high voltage bushing in the second aspect. The embodiment of the utility model provides a high-voltage transmission equipment's beneficial effect is the same with the beneficial effect of second aspect description, and here is no longer repeated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a high-pressure casing in the prior art;

fig. 2 is a schematic structural diagram of a high voltage bushing according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a conductive rod according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a conducting rod according to an embodiment of the present invention;

fig. 5 is a schematic view of another structure of a conductive rod according to an embodiment of the present invention;

fig. 6 is a sectional view of one of the conductive bars provided in fig. 5 taken along the direction a.

Reference numerals:

1-a conductive rod; 2-an insulating sleeve; 3, equalizing a ring; 4-head hardware; 11-an air inlet; 12-an air outlet; 21-air inlet duct; 22-an air outlet duct; 30-a vent pipe; 40-fixing a seal head; 41-a floating support; 51-flow deflectors; 52-bump; 53-short-circuit channel; 60-hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, "and/or" is only one kind of association relation describing the association object, and means that there may be three kinds of relations, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the power industry, insulation between high-voltage equipment and adjacent equipment or buildings needs to be considered, a high-voltage bushing is a common connecting conductor in the high-voltage equipment, and mainly comprises an internal conducting rod which plays a role in conducting and carrying current, and an insulating sleeve with a certain thickness wraps the outside of the high-voltage equipment to ensure that the high-voltage equipment is not punctured and plays an insulating role.

Because of the high voltage and large current to which high voltage bushings are subjected in practical applications, a certain amount of heat is generated. In the high-voltage transmission equipment in the prior art, the used high-voltage bushing has poor internal heat dissipation performance and cannot effectively dissipate heat, so that the heat is accumulated in the conducting rod inside the high-voltage bushing, and the temperature inside the conducting rod is further increased.

In order to solve the above problem, the embodiment of the present application provides a high voltage transmission equipment, including converter transformer, generating line, converter valve and the embodiment of the utility model provides a high voltage bushing.

The embodiment of the utility model provides a high-voltage transmission equipment because include the utility model provides a pair of high-tension bushing can improve the inside heat exchange efficiency of conducting rod, guarantees that the inside temperature of conducting rod can not be too high, and then guarantees high-voltage transmission equipment's normal work.

Embodiments of the present invention provide a high voltage bushing.

First, as shown in fig. 1, the conventional high voltage bushing includes a conductive rod 1 and an insulating sleeve 2, and also includes a grading ring 3 at an end portion thereof to maintain a uniform electric field at the end portion of the high voltage bushing, and a head fitting 4 at the end portion thereof to perform a fitting connection of the bushing.

However, it can be seen that, in the prior art, one end of the conducting rod 1 is closed, and the other end is open, when the conducting rod 1 is cooled by adopting a natural cooling mode, because the conducting rod 1 uses the same opening for air flowing in and out, hot air in the conducting rod 1 and cold air outside flow in and out from the same opening, the entering air and the flowing air can interfere with each other at the opening, thereby affecting the air flow between each other, reducing the cold air entering the inside, and simultaneously also making the heat inside unable to be discharged in time, the heat dissipation efficiency is low, leading to the accumulation of the heat in the conducting rod 1, and causing the temperature rise in the conducting rod 1.

The embodiment of the utility model provides a high-voltage bushing, as shown in fig. 2, include the utility model provides a pair of conducting rod 1, insulating cover 2 and air supply arrangement (not shown in the figure), air supply arrangement include the fan for in the wind channel in conducting rod 1 is sent into through air intake 11 with the outside air.

The embodiment of the utility model provides a high-voltage bushing, owing to adopt the utility model provides a pair of conducting rod 1 can be so that outside cold air and inside hot-air do not disturb each other, as above-mentioned shown, can be so that the heat exchange efficiency of 1 inside conducting rod improves, and inside heat can effectively spill out, and then makes 1 whole temperature of conducting rod can not be too high. In addition, in order to accelerate the air flow speed, an air supply device is further arranged, wherein the air supply device comprises a fan, the fan can increase the air flow, and the outside air can enter the conducting rod 1 by means of the fan.

Specifically, the fan may be disposed at a first end of the conductive rod 1 and fixed at the air inlet by a fixing device, for example, a fixing member. The air guide device can also be arranged at other positions by virtue of the air pipe, and air guide is carried out by virtue of the air pipe.

The following describes a conductive rod according to an embodiment of the present invention with reference to the accompanying drawings.

As shown in fig. 2, the conducting rod 1 is provided with an air inlet 11 and an air outlet 12 at one end of the conducting rod 1, an air duct is formed inside the conducting rod 1, the air duct includes an air inlet duct 21 and an air outlet duct 22, it can be seen that a first end of the air inlet duct 21 is communicated with the air inlet 11, a first end of the air outlet duct 22 is communicated with the air outlet 12, and a second end of the air inlet duct 21 is communicated with a second end of the air outlet duct 22 at a second end of the conducting rod 1.

Thus, when the conducting rod 1 is cooled by external cold air, the external cold air enters the air inlet duct 21 through the air inlet 11, the cold air turns at the second end of the conducting rod 1 and enters the air outlet duct 22, sufficient heat exchange is performed between the cold air and the conducting rod 1 in the air outlet duct 22, and the hot air with heat is finally blown out through the air outlet 12. Compare conducting rod 1 among the prior art, the embodiment of the utility model provides a conducting rod 1, through set up air intake 11 and air outlet 12 at conducting rod 1, form air inlet duct 21 and air-out wind channel 22 in inside, external cold wind is by air intake 11 get into in air inlet duct 21, then end and air-out wind channel 22 intercommunication at the second of air inlet duct 21, carry out the heat transfer with conducting rod 1 in air-out wind channel 22, and then take the heat out from conducting rod 1 inside from air outlet 12. The heat exchange efficiency inside the conducting rod 1 is improved, and the temperature inside the conducting rod 1 is not overhigh. With air intake 11 and air outlet 12 setting in the first end department of conducting rod 1, make things convenient for the overall arrangement of conducting rod 1 in high-voltage transmission equipment more, if need the connecting tube way, set up in the one end of conducting rod 1, also can make things convenient for air intake 11 and air outlet 12 and tube coupling more, simultaneously, also can make the heat transfer more abundant.

In some embodiments, as shown in fig. 2, 3 and 4, a ventilation pipe 30 is disposed inside the conductive rod 1, an air inlet duct 21 is formed inside the ventilation pipe 30, and an air outlet duct 22 is formed in a gap between an outer wall of the ventilation pipe 30 and the inside of the conductive rod 1.

As can be seen from the figure, a ventilation pipe 30 is disposed inside the conducting rod 1, the air inlet duct 21 is formed by the space inside the ventilation pipe 30, and the air outlet duct 22 is formed by the gap between the ventilation pipe 30 and the conducting rod 1. The space inside conducting rod 1 is fully utilized, a plurality of air ducts are formed by arranging ventilation pipes 30, air flowing is optimized, and efficiency is improved.

Copper is often chosen as the material of which the conductive rod 1 in a high voltage bushing is made, because copper has a better heat dissipation than aluminum. However, because the embodiment of the utility model provides a conducting rod 1 has optimized its inside space, has improved heat exchange efficiency. Therefore, the aluminum conducting rod 1 can be used for replacing the copper conducting rod 1, and meanwhile, the heat dissipation efficiency cannot be reduced. This makes the weight of the apparatus lighter, the manufacturing cost is also lower, and the earthquake resistance can also be improved.

In some embodiments, as shown in fig. 2, 3 and 4, a fixing cap 40 is provided at a gap between an inner wall of the first end of the conductive rod 1 and an outer wall of the first end of the vent tube 30.

Because the ventilation pipe 30 is arranged inside the conducting rod 1, the ventilation pipe 30 can be supported and fixed by arranging the fixed seal head 40, and meanwhile, the gap between the conducting rod 1 and the ventilation pipe 30 can be sealed, so that hot air can be blown out from the specified air outlet 12 only.

Of course, it is also possible to choose not to provide the fixed end enclosure 40 and use the gap between the first end of the conducting rod 1 and the first end of the ventilation tube 30 as the air outlet 12. In this case, a fixing structure may be provided inside the conductive rod 1 to fix the vent tube 30.

In some embodiments, when a ventilation tube 30 is provided, as shown in fig. 2, 3 and 4, a floating support 41 is provided within the outlet air duct 22.

Because the conducting rod 1 has a certain length, the ventilation pipe 30 arranged inside also has a certain length and a certain weight, and the floating support part 41 is arranged in the air outlet duct 22 (namely, in the gap between the ventilation pipe 30 and the conducting rod 1) and can support the ventilation pipe 30, so that the ventilation pipe 30 and the conducting rod 1 are coaxially arranged.

Note that the number of the floating supports 41 may be determined according to circumstances. Because the inside of the conducting rod 1 has higher temperature, if the length of the conducting rod 1 is longer, the length of the ventilation tube 30 is correspondingly longer; if a plastic pipe is selected as the ventilation pipe 30, the rigidity of the plastic pipe is inevitably poor, and a large number of floating support parts 41 need to be arranged; if an aluminum alloy pipe is selected as the ventilation pipe 30, a smaller number of floating supports 41 can be provided because the aluminum alloy pipe is more rigid.

In some embodiments, as shown in fig. 3, baffles 51 are provided on the outer wall of the ventilation tube 30.

When cold air exchanges heat in the air outlet duct 22, if the guide vanes 51 are arranged on the outer wall of the ventilation pipe 30, the flow direction and the flow speed of the air can be changed, so that the cooling effect of different positions can be controlled, and the cooling effect of the specific position of the conducting rod 1 is improved.

The guide vanes 51 may be provided by welding or by providing a mounting structure on the ventilation pipe 30.

In other embodiments, as shown in fig. 4, the outer diameter of the ventilation tube 30 may be different in size along the axial direction of the ventilation tube 30.

As can be seen from fig. 4, because the outer pipe diameter of the ventilation pipe 30 is different, there are a plurality of protrusions 52 in the air outlet duct 22. This also allows to vary the flow rate and direction of the air and thus to control the cooling of the contact rod 1 in different positions.

In other embodiments, as shown in fig. 5 and 6, the conducting rod 1 is a solid rod, a plurality of holes 60 are formed at a first end of the conducting rod 1, the plurality of holes 60 extend along the axial direction of the conducting rod 1 and are communicated with a second end of the conducting rod 1, and the plurality of holes 60 are formed to form the air inlet duct 21 and the air outlet duct 22.

As described above, the embodiment of the present application employs an integrally formed conductive rod structure, as shown in the cross-sectional view of fig. 6, having the same shape as a lotus root. One of the holes 60 may be used as the air inlet duct 21 and the air inlet 11, and then the other holes 60 are communicated with the second end of the conducting rod 1 to be used as the air outlet duct 22, and then discharged through the arranged air outlet 12.

By adopting the mode, the heat exchange efficiency of the conducting rod 1 can be improved, and the parts which are additionally arranged and used for fixing and supporting when the ventilating pipe 30 is arranged can be omitted. Meanwhile, the conductive area can be increased, and the flow guide effect of the conductive rod 1 is improved.

In some embodiments, as shown in fig. 2 and 5, a short-circuit channel 53 is disposed on the duct wall of the air inlet duct 21, and the short-circuit channel 53 connects the air inlet duct 21 and the air outlet duct 22.

In order to improve the cooling of the specific part of the conducting rod 1, a short-circuit channel 53 may be disposed on the duct wall of the air inlet duct 21, the air inlet duct 21 and the air outlet duct 22 may be directly communicated through the short-circuit channel 53, and the cold air directly enters the air outlet duct 22 from the air inlet duct 21 through the short-circuit channel 53, so as to directly cool the specific part. Meanwhile, the short-circuit channel 53 can disturb the return air, increase the turbulence and improve the heat exchange effect.

In practical application, when the bushing is installed on a converter transformer, the difference between the highest temperature of the middle part of the conducting rod 1 and the temperature of the end (the second end of the conducting rod 1) of the converter transformer can be controlled to be 20-40 ℃ by adopting the conducting rod 1.

In some embodiments, as shown in fig. 2, 3, 4 and 5, the air outlet 12 is disposed on the tube wall of the first end of the conductive rod 1.

Alternatively, the vent 12 may be formed by using the gap between the vent tube 30 and the conducting rod 1 at the first end or the opening of some holes 60 of the plurality of holes 60 formed in the conducting rod 1 at the first end, or the vent 12 may be separately formed on the sidewall of the first end of the conducting rod 1, as described above, so that if a pipeline is connected to the vent 12, the installation may be conveniently performed.

Specifically, as shown in fig. 2, 3, 4 and 5, a plurality of air outlets 12 may be provided, so that air can be discharged from a plurality of positions to dissipate heat, and the dissipated heat is relatively dispersed and not concentrated at one position.

Further, as shown in fig. 2, the air outlet 12 may be disposed outside the head fitting 4 (on the left side of the head fitting 4 in fig. 2), so that the current-carrying capacity of the conducting rod 1 is not affected, and of course, the air outlet 12 may also be disposed inside the head fitting 4 (on the right side of the head fitting 4 in fig. 2). In fig. 2, air outlets 12 are selectively arranged on the left side and the right side of the head hardware 4.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (11)

1. A conducting rod is characterized in that a first end of the conducting rod is provided with an air inlet and an air outlet; the air duct is formed inside the conducting rod and comprises an air inlet duct and an air outlet duct, the first end of the air inlet duct is communicated with the air inlet, the first end of the air outlet duct is communicated with the air outlet, and the second end of the air inlet duct is communicated with the second end of the air outlet duct.

2. The conducting rod as claimed in claim 1, wherein a ventilation tube is provided inside the conducting rod; the air inlet duct is formed inside the ventilation pipe, and the air outlet duct is formed in a gap between the outer wall of the ventilation pipe and the inner wall of the conducting rod.

3. The conducting rod as claimed in claim 2, wherein a fixing seal head is arranged in a gap between the inner wall of the first end of the conducting rod and the outer wall of the first end of the ventilating pipe.

4. The conducting rod as claimed in claim 3, wherein a floating support is provided in the air outlet duct.

5. The conducting rod as claimed in claim 4, wherein a deflector is provided on an outer wall of the ventilating tube.

6. The conducting rod as claimed in claim 4, wherein an outer pipe diameter of the vent pipe is different in size in an axial direction of the vent pipe.

7. The conducting rod as recited in claim 1, wherein the conducting rod is a solid rod, a plurality of holes are formed at a first end of the conducting rod, the plurality of holes extend along an axial direction of the conducting rod and are communicated with each other at a second end of the conducting rod, and the plurality of holes form the air inlet duct and the air outlet duct.

8. The conducting rod as claimed in any one of claims 1 to 7, wherein a short circuit channel is provided on the air duct wall of the air inlet duct, and the short circuit channel connects the air inlet duct and the air outlet duct.

9. The conducting rod of claim 8, wherein the air outlet is disposed in a wall of the first end of the conducting rod.

10. A high-voltage bushing, characterized by, including the conducting rod of any claim 1 ~ 9, insulating cover and air supply arrangement, air supply arrangement includes the fan, the fan is used for sending outside air into the wind channel in the conducting rod through the air intake.

11. A high voltage power transmission arrangement comprising a converter transformer, a busbar, a converter valve and a high voltage bushing according to claim 10.

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