CN2291553Y

CN2291553Y - Dry-type oilless high-tension bushing

Info

Publication number: CN2291553Y
Application number: CN 97219116
Authority: CN
Inventors: 孙麟; 宋继军; 李博; 胡春海
Original assignee: ELECTRIC POWER SCIENCE INST MI
Current assignee: ELECTRIC POWER SCIENCE INST MI
Priority date: 1997-06-28
Filing date: 1997-06-28
Publication date: 1998-09-16
Anticipated expiration: 2007-06-28

Abstract

The utility model relates to a dry-type oilless high-tension bushing, comprising a guide rod (pipe), a capacitance core, an outer sheath, a flange plate, a high-voltage electrode, filling material arranged between the capacitance core and the outer sheath, and measuring terminals arranged on the flange plate. The utility model is characterized in that the outer sheath is composed of a rigid high-strength resin pipe and a silicon rubber outer insulating layer fixedly sheathed on the outer part of the high-strength resin pipe, and the filling material arranged between the capacitance core and the outer sheath is high molecular material. The utility model has the advantages of high integral rigidity, small size, light weight, convenient operation and maintenance, fire and explosion prevention and good antifouling property, and can be widely used in various occasions on a which high-tension bushing is needed.

Description

Dry type does not have innage gland pipe

The utility model relates to a kind of bushing.

Existing bushing mainly contains following several structural type: 1, porcelain bushing shell structure (as shown in Figure 1 and Figure 2), guide rod (pipe) 1 and inside and

outside insulator

2,3 are rigid body, guide rod (pipe) 1 outside is a capacitor core 4, capacitor core 4 all presses screen 7 and paper oil insulation layer 8 to form by the aluminium foil that alternately is wrapped on the guide rod (pipe) 1, between the inside and

outside insulator

2,3 of equipment or body of wall is mounting flange dish 5, filling fluid insulation oil 6 between capacitor core 4 and porcelain tube 2.Its shortcoming is that weight is big, and insulator is easy to damage, leakage of oil easily, and inflammable and explosive, antifouling property is relatively poor.2, for solving " soft " formula plastic sleeve structure (as shown in Figure 3) that above-mentioned shortcoming designs, it is that the cable core of twisted polyethylene cable is led core 9 as metal, the isolation layer of cable is made solid insulating layer 10, all press screen 11 and teflon insulation layer 12 alternately to twine with aluminium foil vertically in isolation layer 10 outsides and make equalizing press layer, outermost surface adopts the multiphase polymer Radiation Crosslinking Heat to make oversheath 13.It is in light weight, and operation maintenance is easy, can solve problems such as the leakage of oil of porcelain bushing shell, inflammable and explosive and antifouling property, but can only pack cable core by hand, unsuitable mass production; Because integral body is soft structure, during installation, two ends need support insulator to support, and soft oversheath 8, subject to damage simultaneously.3, for addressing the above problem, " firmly " formula plastic sleeve structure (as shown in Figure 4) has appearred again, it still adopts rigidity guide rod (pipe) 14 and capacitor core 15 structural types in the porcelain bushing shell, but change the paper oil insulation layer in the capacitor core 14 into teflon insulation layer 16, and removed fluid insulation oil, directly fix the oversheath made from the multiphase polymer Radiation Crosslinking Heat 17 in capacitor core 14 outsides in " soft " formula plastic sleeve structure, flange plate 18 directly is stuck on the oversheath 17.This kind structure has strengthened leading the skeleton function of core by rigidity guide rod (pipe), the support insulator that has saved two ends supports, make install and use very convenient, but still there is following problem in it, 1. guide rod (pipe) should bear high voltage as core body and bear mechanical force (this mechanical force is delivered to flange plate 18 by oversheath 17) again simultaneously, and insulation is easy to damage.2. the easily vulnerable problem of soft oversheath does not solve well.

It is little that the purpose of this utility model provides a kind of volume, in light weight, and operation maintenance is easy, and fire prevention, dry type explosion-proof, that antifouling property is good do not have innage gland pipe.

To achieve these goals, the utility model is taked following design: a kind of dry type does not have innage gland pipe, it comprises guide rod (pipe), by all pressing screen and isolation layer alternately to twine the capacitor core of forming, oversheath, be arranged on the packing between described capacitor core and the oversheath, be arranged on the flange plate at described oversheath middle part, be arranged on the measurement terminal on the described flange plate, and be arranged on the high-field electrode at described capacitor core and oversheath two ends, it is characterized in that: described oversheath is made up of with the silicone rubber external insulation layer that is fixed in described high-intensity resin tube outside the high-intensity resin pipe of rigidity, and the packing between described capacitor core and the described oversheath is a macromolecular material.

Described guide rod (pipe) can lead to outside the described high-field electrode at two ends, and described high-field electrode is fixed on the described guide rod (pipe).

Described guide rod (pipe) also can lead to indoor end outside the described high-field electrode of this end, and the two is fixed, and the outdoor end of guide rod (pipe) is contracted in the described high-field electrode of this end, on this high-field electrode, fix a pigtail splice, and be flexible coupling by one and be communicated with described guide rod (pipe).

The material of described high-intensity resin pipe can adopt epoxy resin.

Described macromolecular material as packing can be the silicone rubber that pours into and be solidificated between described oversheath and the capacitor core.

The material of described measurement terminal is plastics.

The utility model is owing to take above design, it has the following advantages: 1, the utility model since between oversheath and capacitor core perfusion and cure silicone rubber or fill other insulating polymeric material as packing, therefore, compare with porcelain bushing shell, thoroughly solved leakage of oil and, made operation maintenance very easy by the problem such as inflammable and explosive that leakage of oil causes; Compare with " firmly " formula plastic bushing with " soft " formula plastic bushing, insulation and anti ageing property are greatly improved, and in mechanical force in the process that flange plate transmits, bear mechanical force jointly by the guide rod (pipe) of rigidity and the oversheath of rigidity, perhaps only bear mechanical force, greatly reduced the stressed of capacitor core by oversheath.2, the utility model is owing to removed insulator, the double layer construction oversheath that has adopted high-intensity resins such as epoxy resin and silicone rubber insulation layer to form by rigidity, compare the rigid construction that has both kept oversheath with porcelain bushing shell, make volume-diminished again, weight lightens, and has solved the problem that insulator is easy to damage simultaneously; Compare with " soft " formula plastic bushing, the whole two ends of rigidity are supported without support insulator; Compare with " firmly " formula plastic bushing, the problem that insulator is born than great machinery power has obtained effective solution.3, because external insulation layer of the present utility model adopts the mode of the high-intensity resin tube outside that is fixed in rigidity, and because it adopts silicone rubber material, comparing antifouling property with porcelain bushing shell is greatly improved, compare with " firmly " formula plastic bushing with " soft " formula plastic bushing, solved the easily vulnerable problem of soft oversheath well.It is little, in light weight that the utility model had both had in the conventional art volume, dry type does not have oil, and operation maintenance is easy, and is fire-proof and explosion-proof, features such as antifouling anti ageing property is good, it is good to have integral rigidity again, and capacitor core is not subjected to mechanical force, and two ends need not be supported, advantages such as oversheath is not fragile, it can be used as high-voltage wall bushing, also can be used as in the high pressure equipment such as bushing shell for transformer, circuit breaker sleeve pipe, and can be widely used in the various occasions that need bushing.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.

Fig. 1 is a prior art porcelain bushing shell structural representation

Fig. 2 is the capacitor core structural representation

Fig. 3 is prior art " soft " formula plastic sleeve structure schematic representation

Fig. 4 is prior art " firmly " formula plastic sleeve structure schematic representation

Fig. 5 is the utility model structural representation

As shown in Figure 5, the utility model comprises an elongated guide rod (pipe) 20, is provided with by the aluminium foil that shortens step by step all to press screen 22 and teflon insulation layer 23 alternately to twine the capacitor core of forming 24 on guide rod (pipe) 20.One is divided into two sections oversheath 25 by the high-intensity resin pipe 26 of rigidity be fixed in that external insulation layer 27 that the silicone rubber material on the high-intensity resin pipe 26 makes forms.Two sections oversheaths 25 are fixing with a mounting flange dish 28 respectively, then it is enclosed within the outside of the capacitor core of having made 24, measurement terminal 21 is fixed on the flange plate 28, in the middle of two flange plate 28 that connect with oversheath 25, place sealing gaskets again, and two flange plate 28 are fixed into one.The two high-tension electricity utmost points 30 are installed in the two ends of capacitor core 24 and oversheath 25 respectively, the soft silicon rubber filling thing 29 of perfusion between oversheath 25 and capacitor core 24, after thing 29 to be filled solidified, oversheath 27 and capacitor core 24 and flange plate 28 just were fixed into one.The high-field electrode 30 of one or both ends is the arts demand of perfusion packing, can be with other material as mould, after thing 29 to be filled solidifies, pull down mould, and refill.When installing, an end of the present utility model that only need form a rigid unitary passes the shell of body of wall or high-tension apparatus, by flange plate 28 the utility model is fixed on the prefabricated fixed plate or shell, can use.

As shown in Figure 6, in the foregoing description, guide rod (pipe) 20 also can be shorter, and a pigtail splice 31 is fixed on the high-field electrode 30 of outdoor end, and being flexible coupling by one then is communicated with guide rod (pipe) 20.Guide rod (pipe) 20 can not bear mechanical force substantially like this, and all mechanical forces are born by oversheath 27 and flange plate 28.

In the foregoing description, high-intensity resin pipe 26 can be an epoxide resin material, also can be other high-intensity resin material.

In the foregoing description, high-intensity resin pipe 26 is bonding with the means of fixation of silicone rubber external insulation layer 27, and the two can also take alternate manner to fix, such as: injection moulding, extrusion molding, extrude, moulding by casting etc.

In the foregoing description, oversheath 25 adopts screw thread to add the Placement of binder with the means of fixation of flange plate 28, and the fixing of the two can also take other existing variety of way to fix.

In the foregoing description, the packing 29 that is provided with between oversheath 25 and capacitor core 24 can also be other macromolecular material, such as: silicone grease or foam material etc.

In the foregoing description, the measurement terminal 21 used material in the porcelain bushing shell structure that is fixed on the flange plate 28 is a porcelain, adopts plastic materialss such as nylon, teflon in the utility model.

In the foregoing description, flange plate 28 is set to two, only is the consideration for aspects such as preparation process are easy, and reality only needs a flange plate 28, so other improvement design of flange plate 28 should not got rid of outside protection domain of the present utility model.

Claims

1, a kind of dry type does not have innage gland pipe, it comprises guide rod (pipe), by all pressing screen and isolation layer alternately to twine the capacitor core of forming, oversheath, be arranged on the packing between described capacitor core and the oversheath, be arranged on the flange plate at described oversheath middle part, be arranged on the measurement terminal on the described flange plate, and be arranged on the high-field electrode at described capacitor core and oversheath two ends, it is characterized in that: described oversheath is made up of with the silicone rubber external insulation layer that is fixed in described high-intensity resin tube outside the high-intensity resin pipe of rigidity, and the packing between described capacitor core and the described oversheath is a macromolecular material.

2, dry type as claimed in claim 1 does not have innage gland pipe, it is characterized in that: described guide rod (pipe) leads to outside the high-field electrode at described two ends, and described high-field electrode is fixed on the described guide rod (pipe).

3, dry type as claimed in claim 1 does not have innage gland pipe, it is characterized in that: the indoor end of described guide rod (pipe) leads to outside the described high-field electrode of this end, and the two is fixed, the outdoor end of described guide rod (pipe) is contracted in the described high-field electrode of this end, on this high-field electrode, fix a pigtail splice, and be flexible coupling by one and be communicated with described guide rod (pipe).

4, dry type as claimed in claim 1 does not have innage gland pipe, it is characterized in that: the material of described high-intensity resin pipe is an epoxy resin.

5, do not have innage gland pipe as claim 2 or 3 described dry types, it is characterized in that: the material of described high-intensity resin pipe is an epoxy resin.

6, dry type as claimed in claim 1 does not have innage gland pipe, it is characterized in that: the described macromolecular material as packing is the silicone rubber that pours into and be solidificated between described oversheath and the capacitor core.

7, do not have innage gland pipe as claim 2 or 3 described dry types, it is characterized in that: the described macromolecular material as packing is the silicone rubber that pours into and be solidificated between described oversheath and the capacitor core.

8, dry type as claimed in claim 5 does not have innage gland pipe, it is characterized in that: the described macromolecular material as packing is the silicone rubber that pours into and be solidificated between described oversheath and the capacitor core.

9, dry type as claimed in claim 1 does not have innage gland pipe, it is characterized in that: the material of described measurement terminal is plastics.

10, the dry type of stating as claim 8 does not have innage gland pipe, it is characterized in that: the material of described measurement terminal is plastics.