Background technology
Sleeve pipe is the electrical insulator that conductor can pass through hollow wherein.Sleeve pipe is used in high-tension line must pass the place on wall or other surface, or uses on switching device, transformer, circuit-breaker and other high-tension apparatus.Sleeve pipe is used to make the high-tension line from oil-filled transformer to pass, and this sleeve pipe is in the oil of a part in transformer and the airborne oil-casing air of a part outside transformer thus.Other sleeve pipe is the sleeve pipe of air-air, for example, make to pass by the high-tension line of wall.
Resistance heat loss in sleeve pipe is evenly risen along conductor.The place, top and bottom that this heat is mainly dissipated in sleeve pipe is dissipated among environment.This heat is by conduction and sometimes by convection current, from core, be delivered to end.Even if seldom use, but also know that heat can transmit by evaporative medium, this evaporative medium is so-called heat pipe.In order to prevent that the high temperature of conducting rod from raising, can reduce with thicker conducting rod current density and therefore reduce the heat generating.Yet thicker rod guidance causes material consumption and the cost of increase.
Heat pipe or fast sale are the heat transfer devices that the principle of thermal conductivity and phse conversion is combined and with effectively, the heat transmission between hot interface and cooler interface managed.The function of heat pipe is the fluid of pipeline thermal interface to be evaporated and make its cooler interface that will dissipate at heat condense.
Owing to depending on that the big or small heat of be provided with conductor generates, the given sleeve pipe having for the central space that defines of conductor has different current-carrying capacities.Conventionally, fexible conductor provides relatively low current-carrying capacity, and solid hopkinson bar or pipe conductor provide higher capacity.In an identical manner, compare copper conductor with aluminium and provide higher capacity.Identical basic sleeve pipe can be given various rated current according to the conductor being equipped with on it.If sleeve pipe is provided with heat pipe, rated power can increase.Therefore,, if conductor is equipped with heat pipe, sleeve pipe can be tackled high current and without using larger conductor.Yet heat pipe makes the production of sleeve pipe and safeguards more expensive and may not need for conventional cannula.Instead, there is the application of the heat transmission that the unusual casing of heat pipe improves to some extent like this for needs especially and produce.
CN101369483 (application number CN200810115462.2) discloses a kind of heat pipe sleeve pipe for transformer, comprises electrically conductive conduits, radiator, main insulating layer, insulating sleeve and joint sleeve.This electrically conductive conduits is hollow metallic conduit, and it is at one end connected to radiator and is filled with eco-friendly, non-inflammable cooling fluid.The outside of this electrically conductive conduits has been wrapped main insulating layer, and insulating sleeve and flange connector are arranged on the outside of main insulating layer.This radiator is hollow metal cavity, and its internal cavities is connected to the hollow cavity of electrically conductive conduits.This cooling fluid absorbs the heat that electrically conductive conduits generates and is evaporated to gas, and this gas rises to radiator and discharges for external heat; Subsequently, it condenses and is back to electrically conductive conduits when cooling.
WO2007/107119 discloses a kind of electrical current carriers of being combined with thermal conducting tube phase, and this heat pipe comprises having lower boiling fluid.This electrical current carriers can be used to the sleeve pipe of electric equipment, main winding of current transformer, heavy current busbar etc.
Summary of the invention
Target of the present invention is by allowing sleeve pipe to be used to wider electric current, can be as required adjustable for different rated current and improve flexibility and the availability of sleeve pipe.
According to a first aspect of the invention, provide a kind of electrical insulators sleeve pipe, having comprised: electrical insulator sleeve, it has the center longitudinal hole around the central longitudinal axis of this sleeve pipe; With the electric conductor that passes through the longitudinal hole location, center of this sleeve; Wherein this conductor comprises along this conductor longitudinal extension and in its one end, has the cavity of opening; Wherein this cavity is arranged to for holding heat pipe, this heat pipe comprises and is arranged to the fluid comprising in the closed system along this sleeve pipe transmission heat, and wherein this cavity is arranged to and allows this heat pipe via its opening, to be introduced into described cavity and remove from described cavity.
According to another aspect of the present invention, provide a kind of dismountable heat pipe, this heat pipe comprises: heat pipe; With the fluid that is partially filled this pipe; Wherein this heat pipe forms the closed system that comprises this fluid at least partly; And wherein this heat pipe is configured to be removably inserted through among the cavity of longitudinal extension of the electric conductor that the center longitudinal hole of electrical insulators sleeve pipe positions.
By sleeve pipe and electric conductor thereof are designed so that can increase alternatively or remove heat pipe, make aspect electric current that this sleeve pipe can be used at it more flexibly, and this sleeve pipe can be provided with additional rated power when using heat pipe.Meanwhile, if electric current does not need heat pipe, can in the situation that there is no heat pipe, use identical sleeve pipe.
Conventionally, unless clear and definite definition to some extent in addition here, all terms that use in claim will the common definition in technical field make an explanation according to it.Unless clear and definite, point out in addition, otherwise all at least one examples that is all interpreted as openly referring to this element, device, assembly, device, step etc. of quoting to " element, device, assembly, device, step etc. ".Unless explicitly stated otherwise, otherwise the step of any method disclosed herein all not must carry out with disclosed exact sequence.For different characteristic of the present disclosure/assembly, use " first ", " second " etc. to be only intended to this features/components and other similar characteristics/assembly are distinguished and not to this features/components, give any order and grade.
Embodiment
Accompanying drawing referring now to some embodiment of the present invention shown in it is described more all sidedly to the present invention subsequently.Yet, the present invention can with many multi-form embodied and be not appreciated that be limited to the embodiments set forth herein; On the contrary, these embodiment provide by example so that the disclosure will be comprehensive and complete, and will transmit scope of the present invention completely to others skilled in the art.Same Reference numeral runs through description and refers to same element.
Conductor is configured to by sleeve pipe conduction current.Therefore, at least a portion of conductor is made by for example electric conducting material such as the metal of copper.In the high voltage applications especially for interchange (AC), conductor comprises contact tube expediently, and this is because kelvin effect is only advanced electric current at conductive surface, therefore can save electric conducting material with pipe.According to embodiments of the invention, by the wall surface of such electric conducting material, limited one or more cavitys of heat pipe, for example, between contact tube, between contact tube and another structure or within the wall of such contact tube, so these one or more cavitys can form the longitudinal duct in the wall of pipe.
This cavity is through hole or blind hole or the space of extending along conductor longitudinal axis, and has opening at least one longitudinal end place of this perforate, and heat pipe can be arranged among cavity via this opening.
This fluid can be the arbitrarily suitable fluid of the desired operating temperature of its boiling point in electric conductor.This fluid can be for example water or fluorocarbon.
It should be noted in the discussion above that different embodiment according to the subject invention, this sleeve pipe can be configured to hold the heat pipe of any amount.
Sleeve is made by electrical insulating material, for example, and such as the rubber of silicon rubber, plastics, glass or such as the pottery of porcelain or their combination.The function of this sleeve is that conductor and the wall that for example this sleeve pipe is intended to pass through are insulated.In certain embodiments, this sleeve can comprise insulating cold condenser core, and this core can be formed by insulating material or combination of materials, and it for example comprises plastics, paper, wet goods.Such condenser core can be at least partly extends and parallel with this cavity along cavity (or wherein formed heat pipe), and wherein the other parts of the longitudinal extension of this cavity (or wherein formed heat pipe) can be covered/be completely cut off by the another kind of medium of for example gas.This sleeve has along the longitudinal hole of the central longitudinal axis of sleeve pipe or opening, and therefore this sleeve does not still intersect with described central longitudinal axis around the described central longitudinal axis of sleeve pipe.
Sleeve pipe of the present invention direct current (DC) with exchange (AC) both application in be all favourable.
In certain embodiments, by by described arrangement of cavities for allowing fluid to be introduced into cavity via its opening and to allow the blocked closed system that forms of this opening, described cavity is arranged to and holds heat pipe.According to these embodiment, by fluid liquid being toppled over or otherwise directly introducing cavity, formed heat pipe.The opening of this cavity for example utilizes lid or stopper to stop up subsequently, or utilizes (discussed below) to be attached to the blockage of condenser on opening.Therefore, can and stop up the closed system that its opening forms heat pipe by cavity self.This can be a kind of convenience and cheap mode that forms heat pipe in the condenser of sleeve pipe.The present invention has also covered the sleeve pipe that further comprises fluid after it is introduced into cavity, and wherein this opening is blocked and form closed system.
In certain embodiments, by by this arrangement of cavities for the heat pipe for receiving unit fill fluid by described arrangement of cavities for for holding heat pipe.According to these embodiment, fluid is not directly introduced into cavity.On the contrary, this fluid has comprised in heat pipe, and by the made pipe of Heat Conduction Material, and this heat pipe can be positioned among this cavity.This can be a kind of more simple mode of heat pipe being introduced to conductor, and wherein heat pipe can easily be introduced cavity and/or remove from cavity, and does not overflow the risk of fluid etc.This also makes the fluid can be more easily reusable.And this heat pipe can be prepared as the system of persistence sealing, this has reduced the risk of for example leaking in cavity shutoff place appearance.The present invention has covered and has been arranged to the sleeve pipe that receives such heat pipe, and covered further comprise be partially filled with fluid, by/via its opening, removably insert the sleeve pipe of the heat pipe of cavity.
In certain embodiments, this sleeve pipe also comprises heat conduction condenser (that is, the condenser of being made by Heat Conduction Material), and this heat conduction condenser is a part for this heat pipe closed system and extends outside cavity via opening.By using condenser, can improve the heat transmission from condenser to jacket exterior.Therefore this fluid can have the bottom vaporization of focus by this conductor in cavity, and rises to condenser, and it can be cooled at condenser place and condense, and the situation in being completely contained in conductor with heat pipe is compared, and this more effectively dissipates heat.Yet, notice in certain embodiments, can not need condenser and in those embodiment, heat pipe can be used to heat to transfer to from the focus of conductor the cooling segment of conductor.
In certain embodiments, this cavity departs from and is centrally located in conductor so that described cavity does not intersect with the central longitudinal axis of sleeve pipe.Using the cavity of positioned off-center is favourable for form heat pipe in sleeve pipe, because this allows the central space (along the space of the central longitudinal axis of sleeve pipe) of the formed conductor of solid-state conduit can be used to other purposes.The example of this central space easy to use comprises being arranged to and power circuit/cable is connected to one end of the first end of sleeve pipe conductor in sleeve pipe from the second end one side contrary with sleeve pipe.Also may use solid rod-type conductor rather than pipe, or pull fexible conductor (cable) by central space.Using heat pipe is a kind ofly by what the formed heat of the resistance in sleeve pipe was transferred to extraneous medium from sleeve pipe, sleeve pipe to be carried out to cooling effective means.Yet in other embodiments, holding heat pipe with the central space of conductor may be easily, therefore can not need for example in tubular type conductor, to bore (a plurality of) extra perforate and hold heat pipe.This cavity is not to be positioned at the central longitudinal axis of sleeve pipe or the eccentric device of locating along this central longitudinal axis.Therefore, this cavity does not intersect with the central longitudinal axis of sleeve pipe.This cavity carries out longitudinal extension at least partly along the longitudinal extension of sleeve pipe, so that the lengthwise position (the normally interior location of sleeve pipe) that heat pipe can reduce temperature from expectation by heat transfers to another lengthwise position (external position of sleeve pipe normally, even may be due to sleeve also isolated heat but position beyond sleeve end points).Use the hollow cavity of conductive pipes to be as the existing problem of heat pipe, therefore this cavity cannot be used to the other parts of sleeve pipe or associated with sleeve pipe other parts.Often for other object, need center cavity, for example, in order to the flexible or solid rod-type conductor of location carrying casing current or in order to arrange that maintenance is connected to the pull bar of the bottom contact that Transformer Winding is electrically connected to sleeve pipe conductor of sleeve pipe end points
Fig. 1 is the indicative icon of transformer 8, and its middle sleeve 1 is for passing through the shell conduction current (I, U) of transformer 8.This transformer can be oil-filled transformer.This transformer can be high-tension transformer, thus high-tension current from this transformer, the conductor by sleeve pipe 1 transmits.Therefore sleeve pipe 1 can have the inside oil immersion part of the sleeve pipe lower end in transformer 8, and the airborne exterior section of the sleeve pipe upper end beyond transformer, therefore this sleeve pipe utilizes that its conductor can for example the shell by transformer conducts to for example air transport circuit of distribution network from the winding of transformer by electric current, and sleeve pipe 1 makes electric current with casing insulation and therefore insulate with any other external structure.
Fig. 2 indicative icon the embodiment of sleeve pipe 1 of the present invention.Along schematically showing sleeve pipe 1 in the longitudinal cross-section of the central longitudinal axis 5 of sleeve pipe.The sleeve pipe 1 of Fig. 1 is the cylindrical device of tubulose or essence, and wherein electric insulation sleeve 2 is formed on its longitudinal direction parallel with longitudinal axis 5 around the envelope surface of sleeve pipe.This sleeve insulate electric conductor 3 and the external structure that will arrange the wall of sleeve pipe by it such as sleeve pipe.Conductor 3 is disposed in sleeve longitudinal center through hole 4 and arranges by sleeve longitudinal center through hole 4, and central longitudinal axis 5 is also advanced by this hole 4.Conductor 3 is configured to that (this is by the electric current (I that enters in sleeve pipe lower end and leave in the upper end of described sleeve pipe in the drawings by sleeve pipe 1 conduction current (AC or DC), U) schematically illustrate, but be that contrary direction or interchange is also same possible).In embodiment in the drawings, conductor 3 is hollow tube or cylindrical form, and it forms central space or cavity 9 that central longitudinal axis 5 therefrom passes through.As discussed above, this central space 9 can be used to the different things such as pull bar etc., or for holding heat pipe.Alternatively, can use and there is no the solid conductor of central space 93.In conductor 3, can form at least one (shown in figure, being two) along the cavity 6 of the bias location of conductor 3 longitudinal extensions.Cavity in the embodiment of Fig. 2 is bias and crossing with central longitudinal axis 5.For example, by being filled at least in part with fluid or by being partially filled the heat conduction conduit of fluid, be formed for the heat pipe towards the outside transmission at least one end of sleeve pipe by the heat in sleeve pipe, cavity 6 can hold heat pipe.Cavity 6 for example can be included in the longitudinal duct forming in conductor 3 pipes or cylindrical wall.In embodiment in the drawings, the heat pipe of cavity 6 also comprises one or more condensers 7.Condenser 7 can be in sleeve pipe 1 one end, preferably outside sleeve 2, longitudinal extension dissipates to improve heat.If condenser 7 is positioned at the upper end of sleeve pipe 7, the fluid condensing flow back into the effect by gravity (to be evaporated again) among the cavity part of heat pipe.In certain embodiments, each condenser 7 is exclusively included in a heat pipe, but also predicting condenser 7 can be included in a plurality of heat pipes.Consider gravity, as the above mentioned, condenser 7 is generally arranged in that sleeve pipe 1 estimates in use will be as one end of sleeve pipe upper end.Yet, in certain embodiments, the two ends that condenser 7 are arranged in to sleeve pipe can be easily, for example allow heat pipe to be connected to condenser 7 in every one end of sleeve pipe, or allow a heat pipe in one end of sleeve pipe, to be connected to another heat pipe of condenser in another (on the contrary) of described sleeve pipe, holds and be connected to condenser.
Fig. 3 illustrates for inserting the cavity 6 or 9 and/or from the embodiment of the cavity 6 of conductor 3 or the 9 dismountable heat pipes of extracting out of conductor 3.Heat conduction conduit 10 is formed on wherein fluid-encapsulated 11 closed system.
Fig. 4 illustrates for inserting the cavity 6 or 9 and/or from another embodiment of the cavity 6 of conductor 3 or the 9 dismountable heat pipes of extracting out of conductor 3.Heat conduction conduit 10 is formed on wherein fluid-encapsulated 11 closed system together with condenser 7.
Fig. 5 indicative icon the embodiment of conductor 3.This conductor is illustrated with the cross section of axis 5 perpendicular to axial direction.According to the embodiment of Fig. 5, conductor 3 comprises hollow tube or the cylinder of electric conducting material.This hollow tube conductor 3 forms the above central space 9 of discussing in conjunction with Fig. 2.In longitudinal enclosure wall of conductor tube 3, limit a plurality of tubular cavities 6.The quantity of cavity 6 can significantly change according to the design of sleeve pipe/conductor and to the demand of heat exchange.Here, as example, show four cavitys.As discussed herein, each cavity 6 is arranged to and holds heat pipe.This cavity can be equally spaced along the circumference of managing 3 easily in the wall of described pipe 3, to realize relatively equably heat exchange in the surrounding of conductor 3.In addition or alternatively, central space 9 can be used to hold heat pipe.
Fig. 6 schematically illustrates another embodiment of conductor 3.This conductor is illustrated with the cross section perpendicular to longitudinal axis 5.According to the embodiment of Fig. 6, conductor 3 comprises hollow tube or the cylinder of electric conducting material.This hollow tube conductor 3 forms the above central space 9 of discussing in conjunction with Fig. 2.In longitudinal enclosure wall 6 of conductor 3, limit at least one (showing a plurality of here) cavity 6.According to the embodiment of Fig. 6, follow the curve of wall, one or more cavitys 6 have the prolongation cross section extending along the wall of conductor 3.The quantity of cavity 6 can significantly change according to the design of sleeve pipe/conductor and to the demand of heat exchange.Here, as example, show two cavitys.As discussed herein, each cavity 6 is arranged to and holds heat pipe.This cavity 6 (more than one here) can be equally spaced along the circumference of managing 3 easily in the wall of described pipe 3, to realize relatively equably heat exchange in the surrounding of conductor 3.In addition or alternatively, central space 9 can be used to hold heat pipe.
Fig. 7 indicative icon another embodiment of conductor 3.This conductor is illustrated with the cross section perpendicular to longitudinal axis 5.According to the embodiment of Fig. 7, conductor 3 comprises hollow tube or the cylinder of the electric conducting material of two center arrangement.The central space 9 that the central longitudinal axis 5 of the inner hollow pipe 3a formation sleeve pipe of conductor 3 is advanced by it.The cavity 6 of eccentric location is formed between the inner tube 3a and exterior tube 3b of conductor 3.As discussed herein, each cavity 6 is arranged to and holds heat pipe.In this embodiment, cavity 6 extends in conductor 3 in the transverse plane of 360 ° of encirclement central spaces 9, allows heat in conductor 3, to exchange more equably.In addition or alternatively, central space 9 can be used to hold heat pipe.
Below with reference to several embodiment, invention has been described.Yet as readily understood by the skilled person, above disclosed other embodiment in addition equally may be within the scope of the present invention as appended Patent right requirement limited.