CN204230823U - A kind of extra-high voltage direct-current casing joint - Google Patents
A kind of extra-high voltage direct-current casing joint Download PDFInfo
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- CN204230823U CN204230823U CN201420788190.3U CN201420788190U CN204230823U CN 204230823 U CN204230823 U CN 204230823U CN 201420788190 U CN201420788190 U CN 201420788190U CN 204230823 U CN204230823 U CN 204230823U
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- cover plate
- contact tube
- tube
- bellows
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- 239000004593 Epoxy Substances 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 210000002445 nipple Anatomy 0.000 claims description 6
- 239000002184 metal Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 6
- 230000005684 electric field Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Landscapes
- Diaphragms And Bellows (AREA)
Abstract
The utility model provides a kind of extra-high voltage direct-current casing joint, the epoxy tube comprise contact tube, coaxially arranging with contact tube and support cover plate, support cover plate be provided with axially vertical with it and and the coaxial through hole of contact tube, epoxy tube, contact tube is through through hole, be connected with top cover plate, around the partially conductive pipe supported between cover plate and top cover plate, be provided with the upper end that is positioned at and supports cover plate and connect that support cover plate with bellows that is top cover plate, bellows and contact tube are coaxially arranged.Compared to the prior art, the extra-high voltage direct-current casing joint that the utility model provides, achieve bellows and make corresponding flexible thus solve the telescoping problem of contact tube along with contact tube flexible, solve the metal friction problem caused because of rigid connection between part, improve the reliability of sealing, ensure that the good sealing property of sleeve pipe cavity, improve the problem that easily gets loose caused because of part deadweight, simplify the mounting process of contact tube, save time cost.
Description
Technical field
The utility model relates to a kind of DC bushing joint, specifically relates to a kind of extra-high voltage direct-current casing joint.
Background technology
According to the literature, since the 1950's, high voltage direct current transmission put into operation, through the development of more than 50 years, high pressure, super high voltage direct current electricity transmission technology gradual perfection, last century 70, the eighties, the former Soviet Union carried out extra-high voltage direct-current transmission engineering practice, and its capital equipment is by delivery test also built more than 1000 kilometer of transmission line.International Industry circle and academia never have construction and the operation of interruption, the particularly former Soviet Union and Japanese AC extra high voltage engineering to the research and development of extra-high voltage direct-current transmission technology; Against the accumulation of operating experience for many years, design, the manufacturing technology of key equipment are full-fledged, and still there is a lot of problem for the manufacturing of ultrahigh voltage direct current wall bushing in the R&D process of extra-high voltage direct-current equipment.
And one of key problem of the manufacturing technology of existing ultrahigh voltage direct current wall bushing is: the total length of ultrahigh voltage direct current wall bushing reaches 12 meters even longer, the matching problem making central guiding fulgurite cause because of the expansion performance of material is like this very outstanding, contact tube stretches the joint and contact tube loose contact that directly can cause inside pipe casing, and to stretch the increase of number of times along with contact tube, friction between contact tube and joint easily produces metal fragment, thus cause inside pipe casing electric field distortion, affect the insulation property of sleeve pipe.
For solving the problem, contact tube is reserved the mode of certain length by general employing more, but due to the requirement of through-current capability, mounting process and contact tube length, the length that contact tube can be reserved is very limited, and the friction problem between metal cannot solve, the problem of inside pipe casing electric field distortion still exists.
The direct-current wall bushing contact tube that electric pressure is higher, the problems referred to above will be more outstanding.Along with the increase of catheter length, the stroke of conduit also can increase to unacceptable stage, to directly cause the friction increase between contact tube and joint metal and loose contact like this, thus cause the drawback such as increase and manufacturing cost raising of the distribution of inside pipe casing DC electric field, space-charge accumulation, manufacturing process difficulty.
Along with the development of electrical network, the demand that DC transmission engineering is built is also increasing, therefore, how to improve the matching used DC bushing joint of ultrahigh voltage direct current wall bushing, improving it and intermetallic friction of contact tube increases and the present situation of loose contact, is those skilled in the art's technical problems urgently to be resolved hurrily.
Utility model content
In view of this, the utility model provides a kind of DC bushing joint, avoid joint and intermetallic friction of contact tube increases and the problem of loose contact, thus efficiently solve the telescoping problem of overlength contact tube, solve the problem of the inside pipe casing electric field distortion that the telescoping problem because of overlength contact tube causes, improve the reliability of sealing simultaneously, thus ensure that the good sealing of sleeve pipe cavity.
A kind of extra-high voltage direct-current casing joint, comprise contact tube, be enclosed within contact tube outer and the epoxy tube coaxially arranged with contact tube and the support cover plate be connected with epoxy tube top end face, described support cover plate be provided with axially vertical with it and and the coaxial through hole of described contact tube, epoxy tube, one end of described contact tube is through described through hole, be connected with top cover plate, bellows is connected with between described support cover plate and described top cover plate, described bellows-sheathed is in the outside of described contact tube, and described bellows and described contact tube are coaxially arranged.
Preferably, described bellows two ends are provided with bellows flange.
Preferably, described top cover plate and support cover plate at the two ends of described bellows, respectively with bellows described in described bellows Flange joint.
Preferably, the junction of described top cover plate and support cover plate and described bellows flange is provided with sealing ring.
Preferably, described contact tube is connected with described top cover plate contact.
Preferably, described contact comprises columniform contiguous block and that be arranged on contiguous block one end, axially vertical with contiguous block screw nipple.
Preferably, the external diameter of described contiguous block is less than the internal diameter of described contact tube; The pipe end that is threaded of described contact is connected with the screwed hole of centre of described top cover plate, and the contiguous block end of described contact inserts one end of described contact tube, is connected with described contact tube; Multiple spring touch finger is provided with between described contiguous block outer wall and described contact tube inwall.
Preferably, described support cover plate is connected with described epoxy tube epoxy tube flange.
Preferably, the section of described epoxy tube flange is T-shaped; The junction of described epoxy tube flange and described support cover plate is provided with sealing ring.
Preferably, multiple sealing ring is provided with between the inwall of described through hole and described contact tube outer wall.
As can be seen from above-mentioned technical scheme, the utility model provides extra-high voltage direct-current casing joint, by arranging top cover plate on joint, and bellows is set between two cover plates is connected contact tube and top cover plate with by contact, realize making bellows to make corresponding flexible along with contact tube flexible, avoid joint and intermetallic friction of contact tube increases and the problem of loose contact, thus solve the problem of the inside pipe casing electric field distortion that the telescoping problem because of overlength contact tube causes.
With immediate prior art ratio, the beneficial effects of the utility model are:
1, joint changes top cover plate into from general single cover plate and supports cover plate and is connected the form of bellows, achieves bellows along with flexible the making of contact tube to stretch accordingly, thus solves the telescoping problem of contact tube.
2, bellows is by with top cover plate and support cover plate and be connected, wrap up the contact tube at center, defines the excellent sealing environment of contact tube.
3, contact tube is from the through hole supported cover plate through connecting top cover plate, supports cover plate and better secures contact tube, ensure that the position of contact tube is fixed.
4, contact tube to be connected with top cover plate by contact and the use of spring touch finger, avoids the metal friction between contact tube and cover plate, ensure that the connection of contact and conduit is tight simultaneously.
5, connect the sealing ring that each place uses, make between part, to constitute active connection, solve the metal friction problem caused because of rigid connection between part.
6, the axial seal of contact tube is changed into bellows and the flat seal between top cover plate and support cover plate, improve the reliability of sealing, ensure that the good sealing property of sleeve pipe cavity.
7, bellows and top cover plate and support between cover plate, support cover plate and pass through Flange joint with epoxy tube, improves the problem that easily gets loose caused because part is conducted oneself with dignity.
8, Flange joint install the mounting process that sealing ring simplifies contact tube additional, saves time cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, introduce to the accompanying drawing used required in embodiment or description of the prior art briefly below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of extra-high voltage direct-current casing joint of the present utility model.
Fig. 2 is the structural representation of the contact of extra-high voltage direct-current casing joint of the present utility model.
Wherein, 1-top cover plate, 2-support cover plate, 21-through hole, 3-bellows, 31-bellows flange, 4-contact tube, 5-contact, 51-screw nipple, 52-contiguous block, 6-spring touch finger, 7-wire barrel, 8-sealing ring, 9-epoxy tube, 91-epoxy tube flange, 10-screwed hole of centre, 11-umbrella sheath.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on embodiment of the present utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The present embodiment illustrates the utility model there to be extra-high voltage direct-current casing joint top cover plate having wire barrel.
As shown in Figure 1, the extra-high voltage direct-current casing joint that the utility model embodiment provides comprises contact tube 4, it is outer and with the contact tube 4 coaxial epoxy tube 9, the support cover plate 2 being vertical at contact tube 4 and epoxy tube 9 one end that arrange be positioned at the wire barrel 7 of top cover plate 1 upper end to be enclosed within contact tube 4, support cover plate 2 to be connected with epoxy tube 9 top end face, be connected with bellows 3 between supporting cover 2 and top cover plate 1, bellows 3 is enclosed within the outside of contact tube 4.Support cover plate 2 be provided with axially vertical with it and and contact tube 4, the through hole 21 that epoxy tube 9 is coaxial, support cover plate 2 upper end to be connected with bellows 3, lower end is connected with epoxy tube 9, one end of contact tube 4 is through through hole 21, be connected with the lower end of top cover plate 1, wire barrel 7 is connected with the upper end of top cover plate 1, bellows 3 for connecting top cover plate 1 and support cover plate 2 is coaxially arranged with contact tube 4, wherein, multiple sealing ring 8 is provided with between the inwall of through hole 21 and the outer wall of contact tube 4, the quantity of sealing ring can not be set to 2 to 4 not etc. according to the pore size between the inwall of through hole 21 and the outer wall of contact tube 4, the size of sealing ring also can be set to different according to the pore size between the inwall of through hole 21 and the outer wall of contact tube 4.
Wherein, it is circular bellows flange 31 that the two ends of bellows 3 are welded with section respectively, top cover plate 1 and support cover plate 2 are by welding with bellows flange 31, thus be connected with the two ends of bellows 3, top cover plate 1 and support cover plate 2 are respectively arranged with sealing ring 8 with the junction of bellows flange 31, make top cover plate 1 and support cover plate 2 to be connected with active between bellows 3; The end face edge of the top cover plate 1 after connection and support cover plate 2 is exposed at outside the outer wall of bellows 3, and bellows 3 can adopt thin-wall metal bellows or expansion bellow.
One end of contact tube 4 is connected with top cover plate 1 contact 5 through supporting through hole 21 on cover plate 2;
As shown in Figure 2, contact 5 comprises contiguous block 52 and the screw nipple 51 axially vertical with contiguous block 52 being positioned at contiguous block 52 one end, and contiguous block 52 is cylinder wide at the top and narrow at the bottom.
The external diameter of contiguous block 52 is less than the internal diameter of contact tube 4, the diameter of the end face that screw nipple 51 is connected with contiguous block 52 is greater than the external diameter of contact tube 4, screw nipple 51 is threaded with the screwed hole of centre 10 of top cover plate, contiguous block 52 inserts one end of contact tube 4, be connected with described contact tube 4, multiple spring touch finger 6 is provided with between the outer wall of contiguous block 52 and the inwall of contact tube 4, when contiguous block 52 screws in contact tube 4, multiple spring touch finger 6 makes activity between contact 5 with contact tube 4 also allow connection become more tight reliable while being connected, the deadweight that the quantity of spring touch finger causes according to pore size between contiguous block 52 from contact tube 4 and contact tube 4 length and material is different, 3 to 4 can not arranged not etc.The lower end supporting cover plate 2 is connected with the upper end of epoxy tube 9, and the upper end of epoxy tube 9 is welded with epoxy tube flange 91, supports cover plate 2 and is welded by epoxy tube flange 91, thus be connected to the upper end of epoxy tube 9.
Wherein, the section of epoxy tube flange 91 is the circular flange of T-shaped, the upper end of epoxy tube flange 91 connects the lower end supporting cover plate 2, the inwall of epoxy tube flange 91 connects the outer wall of epoxy tube 9 one end, the support lower end of cover plate 2 and the section folded by sidewall of epoxy tube 9 are the part of the epoxy tube flange 91 of T-shaped, for filling the space between the upper end of epoxy tube 9 and support cover plate 2 lower end, thus realize supporting being tightly connected of cover plate 2 and epoxy tube 9, support cover plate 2 and the junction of epoxy tube flange 91 is provided with sealing ring 8, epoxy tube 9 outer wall is provided with umbrella sheath 11, umbrella sheath 11 is gluing connection with the connection of epoxy tube 9, wherein, support cover plate 2 end face can be annular or round-meshed rectangle is opened at center.
Umbrella sheath 11 adopts vulcanized rubber material.
Top cover plate 1 and support cover plate 2 electroplating surfaces with tin.
Solder fillet during welding processing is greater than R22.
Above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; although be described in detail the utility model with reference to above-described embodiment; those of ordinary skill in the field still can modify to embodiment of the present utility model or equivalent replacement; and these do not depart from any amendment of the utility model spirit and scope or equivalent replacement, it is all being applied within the claims of the present utility model awaited the reply.
Claims (10)
1. an extra-high voltage direct-current casing joint, comprises contact tube, is enclosed within contact tube outer and the epoxy tube coaxially arranged with contact tube and the support cover plate be connected with epoxy tube top end face, it is characterized in that,
Described support cover plate be provided with axially vertical with it and and the coaxial through hole of described contact tube, epoxy tube,
One end of described contact tube, through described through hole, is connected with top cover plate,
Be connected with bellows between described support cover plate and described top cover plate, described bellows-sheathed is in the outside of described contact tube, and described bellows and described contact tube are coaxially arranged.
2. extra-high voltage direct-current casing joint as claimed in claim 1, it is characterized in that, described bellows two ends are provided with bellows flange.
3. extra-high voltage direct-current casing joint as claimed in claim 2, is characterized in that, described top cover plate and support cover plate at the two ends of described bellows, respectively with bellows described in described bellows Flange joint.
4. extra-high voltage direct-current casing joint as claimed in claim 3, is characterized in that, the junction of described top cover plate and support cover plate and described bellows flange is provided with sealing ring.
5. extra-high voltage direct-current casing joint as claimed in claim 1, it is characterized in that, described contact tube is connected with described top cover plate contact.
6. extra-high voltage direct-current casing joint as claimed in claim 5, is characterized in that, described contact comprises columniform contiguous block and that be arranged on contiguous block one end, axially vertical with contiguous block screw nipple.
7. extra-high voltage direct-current casing joint as claimed in claim 6, it is characterized in that, the external diameter of described contiguous block is less than the internal diameter of described contact tube; The pipe end that is threaded of described contact is connected with the screwed hole of centre of described top cover plate, and the contiguous block end of described contact inserts one end of described contact tube, is connected with described contact tube; Multiple spring touch finger is provided with between described contiguous block outer wall and described contact tube inwall.
8. extra-high voltage direct-current casing joint as claimed in claim 1, it is characterized in that, described support cover plate is connected with described epoxy tube epoxy tube flange.
9. extra-high voltage direct-current casing joint as claimed in claim 8, it is characterized in that, the section of described epoxy tube flange is T-shaped; The junction of described epoxy tube flange and described support cover plate is provided with sealing ring.
10. extra-high voltage direct-current casing joint as claimed in claim 1, is characterized in that, be provided with multiple sealing ring between the inwall of described through hole and described contact tube outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420788190.3U CN204230823U (en) | 2014-12-12 | 2014-12-12 | A kind of extra-high voltage direct-current casing joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420788190.3U CN204230823U (en) | 2014-12-12 | 2014-12-12 | A kind of extra-high voltage direct-current casing joint |
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| Publication Number | Publication Date |
|---|---|
| CN204230823U true CN204230823U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420788190.3U Active CN204230823U (en) | 2014-12-12 | 2014-12-12 | A kind of extra-high voltage direct-current casing joint |
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| CN (1) | CN204230823U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107872037A (en) * | 2017-09-22 | 2018-04-03 | 平高集团有限公司 | A kind of wall bushing component elastic support unit |
-
2014
- 2014-12-12 CN CN201420788190.3U patent/CN204230823U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107872037A (en) * | 2017-09-22 | 2018-04-03 | 平高集团有限公司 | A kind of wall bushing component elastic support unit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |