CN219800636U - Glass fiber reinforced plastic dry-type capacitance composite outer sleeve transformer sleeve - Google Patents
Glass fiber reinforced plastic dry-type capacitance composite outer sleeve transformer sleeve Download PDFInfo
- Publication number
- CN219800636U CN219800636U CN202320216127.1U CN202320216127U CN219800636U CN 219800636 U CN219800636 U CN 219800636U CN 202320216127 U CN202320216127 U CN 202320216127U CN 219800636 U CN219800636 U CN 219800636U
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- CN
- China
- Prior art keywords
- flange plate
- gland
- reinforced plastic
- outer sleeve
- convex ring
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- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 239000011152 fibreglass Substances 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 239000003292 glue Substances 0.000 claims abstract description 39
- 210000004907 gland Anatomy 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 239000003990 capacitor Substances 0.000 claims 7
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims 3
- 239000003365 glass fiber Substances 0.000 claims 3
- 238000009413 insulation Methods 0.000 claims 1
- 239000003822 epoxy resin Substances 0.000 abstract description 31
- 229920000647 polyepoxide Polymers 0.000 abstract description 31
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 210000001503 joint Anatomy 0.000 abstract 1
- 239000004593 Epoxy Substances 0.000 description 19
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
Landscapes
- Insulators (AREA)
Abstract
The utility model relates to a glass fiber reinforced plastic dry-type capacitance composite outer sleeve transformer bushing, which relates to the technical field of transformer bushings, and comprises an insulating core body, wherein a convex ring is arranged on the circumferential side wall of the insulating core body; the flange is sleeved outside the insulating core body and provided with a containing groove for containing the convex ring; the gland is connected to the flange plate through threads and clamps the convex ring together with the flange plate; the flange plate is provided with a glue injection hole communicated with the bottom of the accommodating groove, and the gland is provided with a glue overflow hole communicated with the accommodating groove; a support bar which is in butt joint with the convex ring is arranged on the circumferential inner side wall of the accommodating groove; the flange plate is also provided with a thread groove for connecting the gland, and a first sealing gasket is arranged between the gland and the bottom of the thread groove. The utility model has the effects of reducing moisture absorption of encapsulated epoxy resin and improving the stability of the electrical performance of the catheter.
Description
Technical Field
The utility model relates to the technical field of transformer bushings, in particular to a glass fiber reinforced plastic dry-type capacitance composite jacket transformer bushing.
Background
The transformer bushing is an insulating bushing which leads high and low voltage leads inside the transformer to the outside of the oil tank, is used as a lead to be insulated to the ground and plays a role of fixing the lead, and is one of current-carrying elements of the transformer, and in the operation of the transformer, load current passes through the transformer for a long time, and short-circuit current passes through the transformer when short-circuit occurs outside the transformer.
The high-voltage sleeve used in the current power system mainly comprises an oil-filled porcelain sleeve and a glass fiber reinforced plastic dry sleeve. Because the oil-filled porcelain bushing has the defects of oil leakage pollution, collision resistance, poor antifouling performance, explosiveness and the like, which endanger personal safety and equipment safety, the oil-free, maintenance-free and high-reliability use requirements of the power industry on high-voltage electrical appliance products cannot be met, and the glass fiber reinforced plastic dry bushing becomes the first choice of more and more power enterprises and units. The gap between the insulating core of the bushing and the flange is usually encapsulated with epoxy resin, which after curing has the function of adhering the fixing flange and sealing the gap. The flange structure is generally an upper opening structure, and the epoxy resin is directly injected and solidified from the upper opening of the flange to finish encapsulation.
With respect to the related art mentioned above, the inventor found that epoxy resin absorbs moisture from the outside in use, resulting in an increase in dielectric loss of the bushing tip screen, affecting the electrical performance of the catheter.
Disclosure of Invention
In order to reduce moisture absorption of encapsulated epoxy resin and improve stability of electrical performance of a conduit, the utility model provides a glass fiber reinforced plastic dry type capacitance composite jacket transformer bushing.
The utility model provides a glass fiber reinforced plastic dry type capacitance composite coat transformer sleeve which adopts the following technical scheme:
a glass fiber reinforced plastic dry-type capacitance composite coat transformer bushing, comprising:
the insulating core body is provided with a convex ring on the circumferential side wall;
the flange is sleeved outside the insulating core body and provided with a containing groove for containing the convex ring;
the gland is connected to the flange plate through threads and clamps the convex ring together with the flange plate;
the flange plate is provided with a glue injection hole communicated with the bottom of the accommodating groove, and the gland is provided with a glue overflow hole communicated with the accommodating groove.
Through adopting above-mentioned technical scheme, ring flange and gland cooperation use can play preliminary fixed effect to insulating core, again to injecting epoxy in the glue injection hole, until epoxy overflows from the glue overflow hole, blocks up glue injection hole and glue overflow hole, and after epoxy solidification is accomplished, just can accomplish the embedment between ring flange and the insulating core. The epoxy resin is sealed among the flange, the gland and the insulating core body, so that the contact with air is effectively reduced, the moisture absorption of the epoxy resin is further reduced, and the electrical performance stability of the conduit is improved.
Optionally, a support bar abutting against the convex ring is arranged on the circumferential inner side wall of the accommodating groove.
Through adopting above-mentioned technical scheme, support bar butt bulge loop just has formed the passageway that supplies the epoxy to pour into in the holding tank, from arbitrary one side injection epoxy, just can make epoxy fill in the whole holding tank.
Optionally, the flange plate is further provided with a thread groove for connecting a gland, and a first sealing gasket is arranged between the gland and the bottom of the thread groove.
Through adopting above-mentioned technical scheme, sealing performance between gland and the ring flange can be strengthened to first sealed pad, makes epoxy not flow from between gland and the ring flange when pouring, after epoxy solidification, also can reduce the air and get into and contact with epoxy, and then has reduced epoxy's moisture absorption reaction.
Optionally, a second sealing gasket is arranged between the gland and the convex ring.
Through adopting above-mentioned technical scheme, the sealing performance between gland and the insulating core can be strengthened to the second sealed pad, makes epoxy not flow out from between gland and the insulating core when pouring, after epoxy solidification, also can reduce the air and get into and contact with epoxy, and then reduced epoxy's moisture absorption reaction.
Optionally, a first sealing plug is arranged in the glue injection hole.
By adopting the technical scheme, the first sealing plug can block the glue injection hole and prevent the epoxy resin from flowing out of the glue injection hole; after the epoxy resin is cured, air can be reduced from entering the glue injection holes to contact the epoxy resin.
Optionally, the first sealing plug is in threaded connection with the flange plate through a conical tube.
By adopting the technical scheme, the sealing effect of the conical pipe thread is better, and the sealing performance between the first sealing plug and the flange plate can be enhanced.
Optionally, a second sealing plug is arranged in the glue overflow hole.
Through adopting above-mentioned technical scheme, the second sealing plug is used for the shutoff of glue overflow hole, reduces the air and passes through the epoxy contact in glue overflow hole and the holding tank.
Optionally, a sealing ring is arranged between the flange plate and the insulating core body.
Through adopting above-mentioned technical scheme, sealing performance between ring flange and the insulating core can be strengthened to the sealing washer, makes epoxy not follow the gap outflow between ring flange and the insulating core when filling, after epoxy solidification, also can reduce the air and get into and contact with epoxy, and then reduced epoxy's moisture absorption reaction.
In summary, the present utility model includes at least one of the following beneficial technical effects:
1. the epoxy resin is sealed among the flange, the gland and the insulating core body, so that the contact with air is effectively reduced, the moisture absorption of the epoxy resin is further reduced, and the electrical performance stability of the conduit is improved;
2. the support bars are abutted against the convex rings, a channel for injecting epoxy resin is formed in the accommodating groove, and the epoxy resin is injected from any side, so that the whole accommodating groove is filled with the epoxy resin;
3. the first sealing plug can block the glue injection hole and prevent the epoxy resin from flowing out of the glue injection hole; after the epoxy resin is cured, the air can be reduced from entering the glue injection hole to be contacted with the epoxy resin;
4. the sealing ring can enhance the sealing performance between the flange plate and the insulating core body, so that the epoxy resin does not flow out from a gap between the flange plate and the insulating core body when being poured, and after the epoxy resin is solidified, the air can be reduced from entering into contact with the epoxy resin, thereby reducing the moisture absorption reaction of the epoxy resin.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present utility model;
FIG. 2 is a schematic partial cross-sectional view of an embodiment of the present utility model;
FIG. 3 is a schematic view of a flange plate according to an embodiment of the present utility model;
in the figure, 1, an insulating core; 11. a convex ring; 12. a second gasket; 2. a flange plate; 21. a receiving groove; 22. a glue injection hole; 23. a support bar; 24. a thread groove; 25. a first gasket; 3. a gland; 31. a glue overflow hole; 4. a first sealing plug; 5. a second sealing plug; 6. and (3) sealing rings.
Detailed Description
The present utility model will be described in further detail with reference to fig. 1 to 3.
The utility model provides a glass fiber reinforced plastic dry type capacitance composite coat transformer sleeve, which comprises an insulating core body 1, a flange plate 2 and a gland 3, wherein the insulating core body 1 is provided with a convex ring 11, the flange plate 2 and the gland 3 are sleeved on the insulating core body 1 and jointly clamp the convex ring 11, and the gland 3 is in threaded connection with the flange plate 2. The flange plate 2 is provided with a glue injection hole 22, the gland 3 is provided with a glue overflow hole 31, epoxy resin can be injected into the space among the insulating core body 1, the gland 3 and the flange plate 2 from the glue injection hole 22, the epoxy resin overflows from the glue overflow hole 31 after being filled, and the encapsulation is completed after the epoxy resin is solidified.
The outer side wall of the insulating core body 1 is integrally formed with a convex ring 11, and the longitudinal section of the convex ring 11 is rectangular.
Referring to fig. 2 and 3, the flange 2 has a ring shape, an inverted T-shape in longitudinal section, a tubular upper portion, and a disk-like lower portion. The disc is provided with bolt through holes for the flange plate 2 to be connected with the transformer shell through bolts, and eight bolt through holes are uniformly distributed in the embodiment of the utility model. The inside wall of ring flange 2 bottom inlays and is equipped with sealing washer 6, and sealing washer 6 extrusion butt insulating core 1. The sealing ring 6 is used for enhancing the sealing performance between the flange 2 and the insulating core 1, so that epoxy resin does not flow out from a gap between the flange 2 and the insulating core 1 during pouring, and after the epoxy resin is cured, air can be reduced from entering into contact with the epoxy resin. The sealing rings 6 are arranged in two, and are respectively arranged along the axial direction of the insulating core body 1.
The upper side of the flange plate 2 is coaxially provided with a containing groove 21, the inner side wall of the containing groove 21 is integrally formed with a supporting bar 23, the supporting bar 23 is abutted against the circumferential outer side wall of the convex ring 11, and the bottom of the containing groove 21 is abutted against the lower end face of the convex ring 11. Eight support bars 23 are uniformly arranged at intervals along the circumferential direction of the flange plate 2 in the embodiment of the utility model. The support bar 23 abuts against the convex ring 11, a channel for injecting epoxy resin is formed in the accommodating groove 21, and the epoxy resin is injected from any side, so that the whole accommodating groove 21 is filled with the epoxy resin.
The bottom of the tubular part of the flange plate 2 is provided with a glue injection hole 22, and the glue injection hole 22 is communicated with the containing groove 21. The glue injection hole 22 is provided with a through hole on one side close to the convex ring 11, and is provided with an inner conical tube threaded hole on the other side, and the diameter of the hole bottom of the inner conical tube threaded hole is larger than that of the through hole. The through-hole communicating with the receiving groove 21 is located lower than the bottom end of the support bar 23. The first sealing plug 4 is provided with an external conical tube thread which is screwed into the glue injection hole 22. A rubber pad is adhered to the small-diameter end of the first sealing plug 4, a cross groove is formed in the end face of the large-diameter end, the first sealing plug 4 can be screwed in the glue injection hole 22 by using a cross screwdriver, and the rubber pad seals the through hole of the glue injection hole 22.
The receiving groove 21 of the flange 2 is open and provided with a screw groove 24 having a larger diameter than the receiving groove 21 for screw-coupling the gland 3. The groove bottom of the screw groove 24 is provided with a ring-shaped first gasket 25, and the inner diameter of the first gasket 25 is the same as the inner diameter of the accommodation groove 21. The end of the convex ring 11 far away from the bottom of the accommodating groove 21 is provided with an annular second sealing gasket 12, and the outer diameter of the second sealing gasket 12 is the same as the outer diameter of the convex ring 11.
The gland 3 is an annular plate provided with external threads and is screwed into the thread groove 24. The gland 3 compresses the first sealing gasket 25 at the bottom of the threaded groove 24 and compresses the second sealing gasket 12 on the convex ring 11, so that the space inside the accommodating groove 21 can be isolated from the space outside the accommodating groove 21. Glue overflow holes 31 are formed in the pressing cover 3, and four glue overflow holes 31 are uniformly distributed in the circumferential direction of the pressing cover 3 in the embodiment of the utility model. The lower end of the glue overflow hole 31 is a through hole, the upper end is an inner conical tube thread, the diameter of the bottom of the inner conical tube thread hole is larger than that of the through hole, and the through hole is communicated with the accommodating groove 21. The second sealing plug 5 has the same structure as the first sealing plug 4, is also provided with a rubber pad, is in threaded connection with the glue overflow hole 31, and seals the glue overflow hole 31.
The embodiments of the present utility model are all preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (8)
1. A glass fiber reinforced plastic dry-type capacitance composite coat transformer bushing, comprising:
the insulation core body (1) is provided with a convex ring (11) on the circumferential side wall;
the flange plate (2) is sleeved outside the insulating core body (1) and provided with a containing groove (21) for containing the convex ring (11);
the gland (3) is connected to the flange plate (2) in a threaded manner and clamps the convex ring (11) together with the flange plate (2);
the flange plate (2) is provided with a glue injection hole (22) communicated with the bottom of the accommodating groove (21), and the gland (3) is provided with a glue overflow hole (31) communicated with the accommodating groove (21).
2. A glass fibre reinforced plastic dry type capacitor type composite outer sleeve transformer bushing according to claim 1, wherein supporting strips (23) abutting against the convex rings (11) are arranged on the circumferential inner side wall of the accommodating groove (21).
3. The glass fiber reinforced plastic dry type capacitor type composite outer sleeve transformer bushing as claimed in claim 1, wherein the flange plate (2) is further provided with a threaded groove (24) for connecting a gland (3), and a first sealing gasket (25) is arranged between the gland (3) and the bottom of the threaded groove (24).
4. A glass fibre reinforced plastic dry type capacitor type composite outer sleeve transformer bushing according to claim 1, characterized in that a second sealing gasket (12) is arranged between the gland (3) and the convex ring (11).
5. A glass fibre reinforced plastic dry type capacitor type composite outer sleeve transformer bushing as claimed in claim 1, wherein a first sealing plug (4) is arranged in the glue injection hole (22).
6. The glass fiber reinforced plastic dry type capacitor type composite outer sleeve transformer bushing as claimed in claim 5, wherein the first sealing plug (4) is in threaded connection with the flange plate (2) through a conical tube.
7. The glass fiber reinforced plastic dry type capacitor type composite outer sleeve transformer bushing as claimed in claim 1, wherein a second sealing plug (5) is arranged in the glue overflow hole (31).
8. The glass fiber reinforced plastic dry type capacitor type composite outer sleeve transformer bushing as claimed in claim 1, wherein a sealing ring (6) is arranged between the flange plate (2) and the insulating core body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320216127.1U CN219800636U (en) | 2023-02-07 | 2023-02-07 | Glass fiber reinforced plastic dry-type capacitance composite outer sleeve transformer sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320216127.1U CN219800636U (en) | 2023-02-07 | 2023-02-07 | Glass fiber reinforced plastic dry-type capacitance composite outer sleeve transformer sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219800636U true CN219800636U (en) | 2023-10-03 |
Family
ID=88175491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320216127.1U Active CN219800636U (en) | 2023-02-07 | 2023-02-07 | Glass fiber reinforced plastic dry-type capacitance composite outer sleeve transformer sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219800636U (en) |
-
2023
- 2023-02-07 CN CN202320216127.1U patent/CN219800636U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |