CN209625845U - Flame retardant type all-insulating tubular bus - Google Patents

Abstract

The utility model proposes a kind of flame retardant type all-insulating tubular bus; including conductor tube; conductor tube has been orderly arranged outside each the first layer of silica gel, metal protective sleeve pipe, polytetrafluoroethylene ethylene layer, the first high pressure heat-shrink tube, polyester cord layer, the second layer of silica gel, nylon protective layer, the second high pressure heat-shrink tube and epoxy glass cloth; metal protective sleeve pipe includes multiple ribs in the setting of its external circumferential, is axially evenly arranged with multiple pyrocondensation holes on ribs.The utility model reduces the deformation quantity of conductor tube in the fabrication process using the first layer of silica gel and metal protective sleeve pipe, so that conductor tube charge on unit area is evenly distributed, the electric property of conductor tube has been effectively ensured；Polyester cord layer, the second layer of silica gel and nylon protective layer form intensity protective layer, extend the service life of tube type bus jointly with ribs, heat dissipation performance also gets a promotion；Epoxy glass cloth makes tube type bus insulating properties with higher, heat resistance and moisture resistivity.

Description

Flame retardant type all-insulating tubular bus

Technical field

The utility model belongs to tube type bus technical field more particularly to a kind of flame retardant type all-insulating tubular bus.

Background technique

With China's rapid development of economy, demand of the entire society to electric power increasingly increases.110kV and 220KV at present Electric substation's low-pressure side is all made of 10kV, 35kV voltage class, with the increasing of main transformer capacity, the volume of step down side enter line side Constant current is also continuing to increase.Conventional rectangular bus technically be increasingly difficult to meet bus fever in structure and short circuit is electronic Thus the requirement of power causes the increase of added losses, skin effect coefficient, cause decline, the current distribution is uneven of the ability of shutting off It is even.When especially separate unit main transformer capacity is 180MVA or more, main transformer 10kV outgoing line side not only has the electric power of bus bridge itself Problem, heating problem, there are also coagulation upper props near bus bridge support insulator, Steel Structure and bus bridge, the reinforcing bar in basis The heating problem caused by inductive loop in electromagnetic field.Insulate substitute of the copper pipe bus as rectangular bus bar.It is with following Feature: current-carrying capacity is big, good insulation preformance, high mechanical strength, good heat dissipation, temperature rise is low, loss is low, insulating materials heat-resistance coefficient is high, Resist electrical vibration resistance it is strong, not by environmental disturbances, high reliablity, bus framework is concise, arranges clear, easy for installation, maintenance workers Work amount is few.

Currently, tube type bus includes the wrapped all insulation type bus of filling type polytetrafluoroethylene tape and dry type integral type insulation tube Type bus.Dry type integral type insulating tube type busbar mainly includes conductor tube, insulating layer and shielded layer.Conductor tube be mostly used copper pipe or Aluminum pipe, easy thermal conductivity, and use high pressure heat-shrink tube as insulating materials when, copper pipe is easy to produce since uneven heating is even The shape that changes affects to its electric property；Furthermore two longer words of electric pole spacing of one section of tube type bus are connected, Requirements at the higher level just are proposed to the intensity of tube type bus.

Utility model content

The utility model for technical problem present in above-mentioned tube type bus, propose a kind of design rationally, structure it is simple, Deformation coefficient is small and the flame retardant type all-insulating tubular bus of good electric property.

In order to achieve the above object, the technical solution adopted in the utility model is that flame retardant type provided by the utility model is complete Insulating tube type busbar, including conductor tube, the conductor tube have been orderly arranged outside each the first layer of silica gel, metal protective sleeve pipe, have gathered Tetrafluoroethene layer, the first high pressure heat-shrink tube, polyester cord layer, the second layer of silica gel, nylon protective layer, the second high pressure heat-shrink tube and ring Oxygen glass fabric layer, the metal protective sleeve pipe include multiple ribs in the setting of its external circumferential, axial direction on the ribs It is evenly arranged with multiple pyrocondensation holes.

Preferably, the ribs and the tube wall of metal protective sleeve pipe using round-corner transition and ribs with a thickness of 1.5~2.5mm.

Preferably, the polytetrafluoroethylene ethylene layer includes polytetrafluoroethylene tape, the polytetrafluoroethylene tape is with 45 degree of spirals Angle is wrapped in metal protective sleeve pipe.

Preferably, the cord line of the polyester cord layer is oblique line.

Compared with prior art, it the advantages of the utility model and has the active effect that

Flame retardant type all-insulating tubular bus provided by the utility model is reduced using the first layer of silica gel and metal protective sleeve pipe The deformation quantity of conductor tube in the fabrication process makes conductor tube charge on unit area be evenly distributed, conductor tube has been effectively ensured Electric property；Meanwhile polyester cord layer, the second layer of silica gel and nylon protective layer form intensity protective layer, with metal protection protector Tensile stress and shear stress of the common resistant function of the ribs of pipe on entire tube type bus, extend making for tube type bus With the service life, and heat dissipation performance also gets a promotion；Epoxy glass cloth make tube type bus mechanicalness with higher, insulating properties, Heat resistance and moisture resistivity.The utility model is designed reasonably, structure are simple, are suitble to large-scale promotion.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical solution of the utility model embodiment The attached drawing used is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the utility model, For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings Obtain other attached drawings.

Fig. 1 is the structural schematic diagram for the flame retardant type all-insulating tubular bus that embodiment provides；

In above each figure, 1, conductor tube；2, the first layer of silica gel；3, metal protective sleeve pipe；31, ribs；32, pyrocondensation hole； 4, polytetrafluoroethylene ethylene layer；5, the first high pressure heat-shrink tube；6, polyester cord layer；7, the second layer of silica gel；8, nylon protective layer；9, second High pressure heat-shrink tube；10, epoxy glass cloth.

Specific embodiment

It is with reference to the accompanying drawing and real in order to be more clearly understood that the above objects, features, and advantages of the utility model Example is applied to be described further the utility model.It should be noted that in the absence of conflict, embodiments herein and reality The feature applied in example can be combined with each other.For sake of convenience, hereafter such as there are "upper", "lower", "left", "right" printed words, only indicate It is consistent with the upper and lower, left and right direction of attached drawing itself, restriction effect is not played to structure.

Many details are explained in the following description in order to fully understand the utility model, still, this is practical Novel to be implemented using other modes described herein are different from, therefore, the utility model is not limited to be described below The limitation of the specific embodiment of specification.

Embodiment, as shown in Figure 1, flame retardant type all-insulating tubular bus provided by the utility model, including conductor tube 1, it leads Body pipe 1 be orderly arranged outside each the first layer of silica gel 2, metal protective sleeve pipe 3, polytetrafluoroethylene ethylene layer 4, the first high pressure heat-shrink tube 5, Polyester cord layer 6, the second layer of silica gel 7, nylon protective layer 8, the second high pressure heat-shrink tube 9 and epoxy glass cloth 10.First silica gel For layer 2 when dampness meets water or temperature increases, variation is smaller, there is fabulous high temperature resistant (250-300 DEG C) and low temperature resistant (- 40-60 DEG C) performance, there is good physiological stability, even if the silica that short circuit burning generates still is insulator, this is ensured that electrically Equipment works on, so optimum makes electric wire, cable, lead wire；Metal protective sleeve pipe 3 has shielding action, meanwhile, increase The intensity of strong tube type bus, and tube type bus can make even heat point when temperature increases in production or use process Cloth avoids distorting, so that the charge in conductor tube is uniformly distributed.

Further, polytetrafluoroethylene ethylene layer 4, the first high pressure heat-shrink tube 5 and the second high pressure heat-shrink tube 9 are the exhausted of tube type bus Edge main body, polytetrafluoroethylene (PTFE) have high temperature resistant, low temperature resistant, anti-flammability, corrosion-resistant, weatherability, it is high lubricate, do not adhere to, nonhazardous, The features such as electrical insulating property；First high pressure heat-shrink tube 5, the second high pressure heat-shrink tube 9 use polyolefin material for main material, have height Temperature contraction, soft fire-retardant, insulation corrosion protection function；The material will undergo glassy state-elastomeric state, glassy state with temperature from low to high Shi Xingneng is close to plastics, and performance is close to rubber when elastomeric state.Heat-shrink tube material therefor is glassy state at room temperature, is become after heating Elastomeric state；Heat-shrink tube is heated to elastomeric state when production, applying load makes its expansion, the fast quickly cooling in the case where keeping expansion But, glassy state is made it into, this state is just fixed, when in use a heating, it will become elastomeric state again, lose load Just it bounces back；Second heat-shrinkable T bush in the present invention can also fit closely polytetrafluoroethylene ethylene layer and metal protective sleeve pipe, make The two keeps higher circular degree, to be conducive to the cladding of subsequent layered material.

Still further, the cord line of polyester cord layer 6 is oblique line, polyester cord layer 6, the second layer of silica gel 7 and nylon Protective layer 8 forms intensity protective layer, can fit closely with high pressure heat-shrinkable T bush, and heat dissipation performance also gets a promotion；Metal is protected Protecting pipe has shielding action, is conducive to the electric property for improving tube type bus；The expoxy glass that epoxy glass cloth 10 uses Cloth at high temperature stablize by electric property, is suitable for mechanical, electric appliance and the high insulation system components of electronics, with high machinery with The preferable heat resistance of dielectric properties and moisture resistivity.

In order to improve tension, the shearing strength of tube type bus, metal protective sleeve pipe 3 provided by the utility model is included in it Multiple ribs 31 of external circumferential setting, are evenly arranged with multiple pyrocondensation holes 32 on ribs 31, with polyester cord layer 6, the Second silica gel layer 7 and nylon protective layer 8 formed tensile stress of the common resistant function of intensity protective layer on entire tube type bus and Shear stress extends the service life of tube type bus；Meanwhile pyrocondensation hole has the function of heat dissipation and Light deformation, is producing or is making It is concentrated on ribs with the deformation that thermal force in the process generates, avoids conductor tube thermal deformation, the electricity of conductor tube has been effectively ensured Gas stability.

In order to improve the quality of production of tube type bus, ribs 31 provided by the utility model and metal protective sleeve pipe 3 Tube wall using round-corner transition and ribs with a thickness of 1.5~2.5mm, can under the intensity for guaranteeing metal protective sleeve pipe It is fitted closely with polytetrafluoroethylene ethylene layer 4, meanwhile, polytetrafluoroethylene ethylene layer 4 includes polytetrafluoroethylene tape, and polytetrafluoroethylene tape is with 45 degree Helical angle is wrapped in metal protective sleeve pipe 3, along with the retraction of the first high pressure heat-shrinkable T bush acts on, can improve gold in this way Belong to protection sleeve pipe, the cooperation precision of polytetrafluoroethylene ethylene layer and the first high pressure heat-shrink tube, be conducive to the cladding of subsequent layered material, improves pipe The quality of type bus, and will not influence metal protective sleeve pipe, polytetrafluoroethylene ethylene layer and first after generating thermal force in use The cooperation precision of high pressure heat-shrink tube.

The above descriptions are merely preferred embodiments of the present invention, is not to make other forms to the utility model Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent The equivalent embodiment of variation is applied to other fields, but all without departing from the content of the technical scheme of the utility model, according to this reality With novel technical spirit any simple modification, equivalent variations and remodeling to the above embodiments, it is practical new to still fall within this The protection scope of type technical solution.

Claims (4)

1. a kind of flame retardant type all-insulating tubular bus, including conductor tube, which is characterized in that the conductor tube is orderly arranged outside each Have the first layer of silica gel, metal protective sleeve pipe, polytetrafluoroethylene ethylene layer, the first high pressure heat-shrink tube, polyester cord layer, the second layer of silica gel, Nylon protective layer, the second high pressure heat-shrink tube and epoxy glass cloth, the metal protective sleeve pipe are included in the setting of its external circumferential Multiple ribs, be axially evenly arranged with multiple pyrocondensation holes on the ribs.

2. flame retardant type all-insulating tubular bus according to claim 1, which is characterized in that the ribs and metal coating The tube wall of casing using round-corner transition and ribs with a thickness of 1.5~2.5mm.

3. flame retardant type all-insulating tubular bus according to claim 2, which is characterized in that the polytetrafluoroethylene ethylene layer includes Polytetrafluoroethylene tape, the polytetrafluoroethylene tape are wrapped in metal protective sleeve pipe with 45 degree of helical angles.

4. flame retardant type all-insulating tubular bus according to claim 3, which is characterized in that the cord of the polyester cord layer Line is oblique line.