CN209675080U - A kind of Transformer Bushing Tap earthing or grounding means - Google Patents
A kind of Transformer Bushing Tap earthing or grounding means Download PDFInfo
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- CN209675080U CN209675080U CN201920909078.3U CN201920909078U CN209675080U CN 209675080 U CN209675080 U CN 209675080U CN 201920909078 U CN201920909078 U CN 201920909078U CN 209675080 U CN209675080 U CN 209675080U
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- earthing
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- transformer bushing
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Abstract
In order to solve the problems, such as that easily occur using spring can not return for normal grounding type end shield earthing or grounding means in the prior art, the utility model provides a kind of Transformer Bushing Tap earthing or grounding means, including metallic ground flange, the fixed stem and ground sleeve that simultaneously one end is connect with end shield on high voltage bushings；Its technical solution is that the other end of stem is provided with screw thread；Ground sleeve passes through the threaded hole being arranged thereon and is equipped with stem, contacts the lateral surface of ground sleeve with the inner ring side wall of metallic ground flange.The utility model structure is simple, by way of screwing, is connected after making ground sleeve and metallic ground flange contact, high reliablity.
Description
Technical field
The utility model relates to bushing shell for transformer field more particularly to a kind of normal earthing or grounding means of Transformer Bushing Tap.
Background technique
Bushing is electrical equipment important in power grid, it can make the conducting wire safety with high voltage and powerful electric current
Ground passes through ground connection wall, tank wall and metal shell, is connected with other high voltage electric equipments, not still lead over the ground exhausted
Edge, but also it is responsible for the effect of anchor leg.High-voltage capacitance formula casing is one kind more common in casing.
Condenser-type terminal is made of capacitor core, end shield, insulator, metal-ware and conductor.The capacitor core of casing is by more
The aluminium foil layer composition of layer mutually insulated, referred to as capacitance plate, can effectively improve internal electric field distribution, improve insulating materials and utilize
Rate.Capacitance plate number is more, and field distribution is more uniform in insulation, wherein first screen close to high-pressure conductive part is zero
Screen, it is connected with primary conductive part, and outermost one layer of screen is known as end shield, is drawn and is grounded by end shield earthing or grounding means, entire electricity
Rong Ping is totally submerged in insulating oil.
When running in power grid, end shield needs reliable ground, can just make the electric field on insulator surface of external insulation by inside in this way
The pressure of capacitor core is acted on and is evenly distributed, and the effect of protection capacitor core is also functioned to, to improve the electrical of casing
Insulation performance.The capacitance and dielectric loss of its capacitance plate can be measured by end shield, to judge the insulation status of capacitance plate, slapped
Insulation performance is held, therefore the leading-out terminal of end shield earthing or grounding means is also referred to as measurement terminal.It can be effective by end shield measurement terminal
Ground finds the defects of main end shield humidified insulation, insulating oil deteriorate, open a way between capacitance plate or is short-circuit, if end shield is opened a way in operation,
High voltage to occur, and easily lead to equipment damage.
Transformer capacitor formula bottom shielding of bushing earthing mode, it is closed can be divided into exposed linking (external), metal casing
(built-in) and normal grounding type (are grounded for a long time by spring pressure end.Wherein, normal grounding type Transformer Bushing Tap earthing or grounding means
It is most common one kind.
Such as Fig. 1, normal grounding type end shield earthing or grounding means uses rod-type sleeve ground mode.End shield is drawn by stem, lead
Column insulation against ground, one, stem housing is connected with the metallic ground set of spring arrangement, and metallic ground set closely connects with stem
Touching.Metallic ground set is connected by the pressure of contained spring with grounded metal flange on the inside of casing when normal operation, passes through spring
Ground sleeve end shield reliable ground.Most external have protective metal shell lid screw protect and there is gasket to seal with dust protection and moisture into
Enter.
The normal grounding type end shield ground connection main producing cause of defect is that outer ground sleeve spring insufficient pressure or stem are dirty
Bite causes ground sleeve not completely return to normal position, and the poor contact between end shield stem causes end shield ground fault.
By secondary as it can be seen that such as Fig. 1, existing normal grounding type end shield earthing or grounding means, due to carrying out grounding using spring,
After spring fatigue, easily occur can not return the problem of.
Utility model content
In order to solve the problems, such as in the prior art normal grounding type end shield earthing or grounding means using spring easily occur can not return,
The utility model provides a kind of Transformer Bushing Tap earthing or grounding means, with simple, the safe and reliable feature of structure.
The utility model solves above-mentioned technical problem and is adopted the technical scheme that: a kind of Transformer Bushing Tap ground connection dress
It sets, including metallic ground flange, the fixed stem and ground sleeve that simultaneously one end is connect with end shield on high voltage bushings；Its technology
Scheme is that the other end of stem is provided with screw thread；Ground sleeve passes through the threaded hole being arranged thereon and is equipped with stem,
Contact the lateral surface of ground sleeve with the inner ring side wall of metallic ground flange.
Further, metallic ground flange includes annular portion and lug boss；Wherein, it is provided with through-hole in the middle part of lug boss,
Arc groove is provided on the inner sidewall of the through-hole；Ground sleeve includes cylindrical section and arc convex portion；Wherein, arc convex portion with
The arc groove of lug boss is correspondingly arranged.
Further, metallic ground flange includes the lug boss that coaxial arrangement is surveyed in annular portion and annular portion；Wherein, raised
Location hole is provided in the middle part of portion；The diameter of the location hole becomes larger from top to bottom；Ground sleeve includes cylindrical section and rotary table portion；
Wherein, the diameter in the rotary table portion becomes larger from top to bottom is correspondingly arranged with the inner sidewall of location hole.
Further, hexagonal prisms section is provided on cylindrical section.
A kind of Transformer Bushing Tap earthing or grounding means, further includes: the protective case on ground sleeve is removably set.
Have the beneficial effect that screw thread is arranged by the other end in stem in the utility model brought by the utility model,
Ground sleeve is set to screw on or screw off on stem.Since the outside diameter of ground sleeve is greater than the inner ring diameter of metallic ground flange,
So contacting the lateral surface of ground sleeve with the inner ring side of metallic ground flange during upper rotation ground sleeve, until rotation
Immediately follows cover.The inner ring side of ground sleeve and metallic ground flange is in close contact at this time, achievees the purpose that ground connection.The utility model
Structure is simple, by way of screwing, is connected after making ground sleeve and metallic ground flange contact, high reliablity.
Detailed description of the invention
Fig. 1 is normal grounding type end shield earthing or grounding means in the prior art.
Fig. 2 is a kind of embodiment.
Fig. 3 is another embodiment.
Fig. 4 is the embodiment with protective case.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are under that premise of not paying creative labor
Every other embodiment obtained, fall within the protection scope of the utility model.
The technical solution that the utility model solves technical problem makes: a kind of Transformer Bushing Tap earthing or grounding means, including gold
Belong to ground connection flange 1, the fixed stem 2 and ground sleeve 3 that simultaneously one end is connect with end shield on high voltage bushings；Its technical solution exists
In the other end of stem 2 is provided with screw thread；Ground sleeve 3 passes through the threaded hole being arranged thereon and is equipped with stem 2, makes
The lateral surface of ground sleeve 3 is contacted with the inner ring side wall of metallic ground flange 1.
Specific embodiment I: such as Fig. 2, metallic ground flange 1 includes annular portion 101 and is coaxially disposed with annular portion 101
Lug boss 102；Wherein, the middle part of lug boss 102 is provided with through-hole；Ground sleeve 3 includes cylindrical section 301 and arc convex portion 302；
Wherein, arc convex portion 302 is similar to spherical surface；The interior of through-hole on lug boss 102 goes out arc groove and arc using lathe vehicle
The arcwall face of shape lug boss 302 such as spherical surface is corresponding.In the present embodiment, the contact surface of arc convex portion 302 and arc groove exists
Ground sleeve 3 reaches maximum when be tightened on stem 2 completely, at this point, contact surface is big, end shield earthing or grounding means ground connection is made more may be used
It leans on.
It should be clear that: the diameter in arc convex portion 302 is much larger than the diameter of 102 through-hole of lug boss.
Specific embodiment II: such as Fig. 3, compared with specific embodiment I, the middle part of lug boss 102 is provided with location hole 1A；It should
The diameter of location hole 1A becomes larger from top to bottom, a similar inverted truncated cone-shaped；Ground sleeve 3 includes cylindrical section 301 and circle
Platform portion 303；Wherein, the diameter in the rotary table portion 303 becomes larger from top to bottom, a similar truncated cone-shaped just put.When in use,
The rotary table portion 303 is revolved in stem 2 by the way that screw thread is gradually upper, and is contacted with the inner ring of location hole 1A, when rotary table portion 303 is revolved completely
When tight, end shield earthing or grounding means reliable ground.
It should be clear that: in the present embodiment, rotary table portion 303 is greater than the lesser hole location hole 1A compared with the diameter of large end face
Diameter；The diameter in 303 small end face of rotary table portion is less than the diameter in the lesser hole location hole 1A.
Ground sleeve 3 is screwed for convenience, one section of hexagonal prisms section is provided on the cylindrical section in ground sleeve 3, for utilizing work
Tool screws ground sleeve 3 or in measurement, and the complete Panasonic of ground sleeve 3 is come, until ground sleeve 3 and metallic ground flange 1 are no longer
Contact.
As Fig. 4 can also be arranged screw thread in the outside of the lug boss 102 in specific implementation II, will cover to guarantee to clean
The protective case 4 of shape is tightened on the outside of lug boss 102 by screw thread, and dust etc. is avoided to fall into.It, can be in order to guarantee leakproofness
In the open end of protective case 4, sealing ring 4A is set.
Certainly, it also can use same mode in specific implementation I and protective case 4 be installed, repeats no more herein.
The utility model abandons the spring for the problem of being easy to appear on the basis of existing normal grounding type end shield earthing or grounding means
5, and spring 5 is replaced by screw thread, improve the reliability of normal grounding type end shield earthing or grounding means.
The foregoing is merely the preferred embodiment of utility model, oneself, is not intended to limit the utility model, all in this reality
With made any modifications, equivalent replacements, and improvements within novel spirit and principle etc., the utility model should be included in
Within protection scope.
Claims (5)
1. a kind of Transformer Bushing Tap earthing or grounding means, including metallic ground flange (1), it is fixed on high voltage bushings and one end with
The stem (2) and ground sleeve (3) of end shield connection；It is characterized in that, the other end of stem (2) is provided with screw thread；Ground connection
Set (3) passes through the threaded hole being arranged thereon and is equipped with stem (2), makes the lateral surface and metallic ground method of ground sleeve (3)
The inner ring side wall contact of blue (1).
2. a kind of Transformer Bushing Tap earthing or grounding means according to claim 1, it is characterised in that: metallic ground flange
It (1) include annular portion (101) and lug boss (102)；Wherein, it is provided with through-hole in the middle part of lug boss (102), the inside of the through-hole
Arc groove is provided on wall；Ground sleeve (3) includes cylindrical section (301) and arc convex portion (302)；Wherein, arc convex portion
(302) arc groove with lug boss (102) is correspondingly arranged.
3. a kind of Transformer Bushing Tap earthing or grounding means according to claim 1, it is characterised in that: metallic ground flange
It (1) include the lug boss (102) that coaxial arrangement is surveyed in annular portion (101) and annular portion (101)；Wherein, in lug boss (102)
Portion is provided with location hole (1A)；The diameter of the location hole (1A) becomes larger from top to bottom；Ground sleeve (3) includes cylindrical section
(301) and rotary table portion (303)；Wherein, the diameter in the rotary table portion (303) becomes larger and the inside of location hole (1A) from top to bottom
Wall is correspondingly arranged.
4. a kind of Transformer Bushing Tap earthing or grounding means according to claim 2 or 3, it is characterised in that: cylindrical section (301)
On be provided with hexagonal prisms section.
5. a kind of Transformer Bushing Tap earthing or grounding means according to claim 1, it is characterised in that: further include protective case
(4)；The protective case (4) is removably arranged on ground sleeve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920909078.3U CN209675080U (en) | 2019-06-17 | 2019-06-17 | A kind of Transformer Bushing Tap earthing or grounding means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920909078.3U CN209675080U (en) | 2019-06-17 | 2019-06-17 | A kind of Transformer Bushing Tap earthing or grounding means |
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| Publication Number | Publication Date |
|---|---|
| CN209675080U true CN209675080U (en) | 2019-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920909078.3U Active CN209675080U (en) | 2019-06-17 | 2019-06-17 | A kind of Transformer Bushing Tap earthing or grounding means |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917199A (en) * | 2021-10-22 | 2022-01-11 | 广东电网有限责任公司 | Safe and quick connecting device |
-
2019
- 2019-06-17 CN CN201920909078.3U patent/CN209675080U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917199A (en) * | 2021-10-22 | 2022-01-11 | 广东电网有限责任公司 | Safe and quick connecting device |
| CN113917199B (en) * | 2021-10-22 | 2024-02-13 | 广东电网有限责任公司 | Safe and quick connecting device |
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