CN104965128A - Multifunctional auxiliary test tool for bushing tap grounding device - Google Patents
Multifunctional auxiliary test tool for bushing tap grounding device Download PDFInfo
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- CN104965128A CN104965128A CN201510368924.1A CN201510368924A CN104965128A CN 104965128 A CN104965128 A CN 104965128A CN 201510368924 A CN201510368924 A CN 201510368924A CN 104965128 A CN104965128 A CN 104965128A
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- stem
- bushing
- earthing device
- embedding groove
- bottom shielding
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Abstract
The invention discloses a multifunctional auxiliary test tool for a bushing tap grounding device, comprising a main body, a connection end column, a fixing shaft, a control button, an energy storage spring and a position-limiting pin. The lower end of the connection end column passes through the left end of the main body; a regulation hole is formed in the middle of the control button; the control button is fixed in an inlaying groove by utilizing a fixing shaft; the left end of the control button is connected to the upper end of the connection end column; the lower end of the energy storage spring is fixed on the bottom of the right end of the inlaying groove; the position-limiting pin is fixed on the upper part of the right end surface of the inlaying groove; and the right end of the control button is inserted into the position-limiting pin in sliding connection. The multifunctional auxiliary test tool for a bushing tap grounding device solves the bushing dielectric loss of the bushing tap grounding device and the disadvantages in the insulation resistance test, eliminates the safety hazards of the transformer after the maintenance test work, further improves reliability for power safe usage and provides safety measurement and the technical support. Besides, the multifunctional auxiliary test tool for bushing tap grounding device is also reasonable in structure design, easy in use and portability and low in cost.
Description
Technical field
The invention belongs to electric system testing tool technical field, particularly relate to a kind of bottom shielding of bushing earthing device multi-functional auxiliary testing instrument.
Background technology
In electric system, as shown in Figure 1, it comprises O-ring seal 1, ground connection lid 2, ground sleeve 3, stem 5, base 7, insulcrete 8, spring 9 and inner sleeve 10 to the structure of 0HS3967 molded cannula end shield earthing device conventional at present; Wherein the edge of base 7 utilizes the reserved location that is bolted on bushing shell for transformer flange and is grounded, and is formed with a center pit in the middle part of it; Insulcrete 8 is arranged in the center pit on base 7; Stem 5 left end is fixed on the center of insulcrete 8, and it is outside that right-hand member extends to base 7, and right part is radially formed with a fixed orifice 4; Spring 9 is enclosed within the middle part of stem 5; Ground sleeve 3 is in hat shape, and upper surface is formed with a perforate for leadthrough post 5, is enclosed within stem 5 right part in a sliding manner; Inner sleeve 10 is in lid, and end face center is formed with one for running through the circular hole on ground sleeve 3 top, and around being arranged on outside spring 9 and ground sleeve 3, lower end is fixed on base 7, and Circularhole diameter is less than the diameter of shade on ground sleeve 3; Ground connection lid 2 is also in lid, and around being arranged on outside inner sleeve 10, and lower end is fixed on base 7 by O-ring seal 1.In normal use procedure, the ground connection of bottom shielding of bushing earthing device is outwards passed along stem 5 by ground sleeve 3 by the bounce produced after spring 9 pressurized, shade on ground sleeve 3 contacts with the circular hole internal orifice in inner sleeve 10, as shown in A in Fig. 1, reaches the object of ground connection thus.Now spring 9 internal diameter and one end contact with stem 5, and ground sleeve 3 and stem 5 are slidably matched, and the shade of ground sleeve 3 closely crimps with spring 9, and the Contact of three is better and contact resistance is very little, makes stem 5 safety ground.But, there is following point when carrying out sleeve pipe dielectric loss and megger test in this bottom shielding of bushing earthing device: as shown in Figure 2, when needs carry out sleeve pipe dielectric loss and megger test, first unclamp ground connection by tester and cover 3, then the outer end of ground sleeve 3 is withstood with Flathead screwdriver by its ejection inward, thus expose the fixed orifice 4 of stem 5 outer end, then in this hole, insert a preprepared toothpick 11 makes it not reset to fix ground sleeve 3, at this moment the shade on ground sleeve 3 will leave the circular hole internal orifice in inner sleeve 10 and reach the object departing from ground connection, thus meet test job needs.After work to be tested completes, with the outer end that Flathead screwdriver withstands ground sleeve 3, it is slightly pushed away inward again, then toothpick 11 is extracted, but the xylogen now on toothpick 11 is often trapped in the annular space in fixed orifice 4 and between stem 5 and ground sleeve 3 because being squeezed the reasons such as scratch, even sometimes also can toothpick 11 be squeezed off in fixed orifice 4, or because making that with scratching stem 5 during Flathead screwdriver ejection ground sleeve 3 it produces cut or trickle copper scale, these all can make ground sleeve 3 be obstructed along the slip of stem 5, thus affect reset and the earthing effect of ground sleeve 3, in addition, owing to lacking grease lubrication for a long time between stem 5 and ground sleeve 3, also ground sleeve 3 can be caused to move the phenomenon of bite imperfect earth, thus cause bottom shielding of bushing earthing device imperfect earth, ground sleeve 3 is easily caused to generate heat in this case, ground sleeve 3 generates heat and spring 9 can be made to cause elastic force to decline gradually by thermal annealing, and then causes transformer high-voltage bushing to explode, and finally causes external power failure.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of bottom shielding of bushing earthing device multi-functional auxiliary testing instrument.
In order to achieve the above object, bottom shielding of bushing earthing device multi-functional auxiliary testing instrument provided by the invention comprises main body, terminal stud, stationary shaft, control button, energy-stored spring and spacer pin; Wherein main body adopts oil impregnate nylon to make, cave inward in the middle part of left side and be formed with a stem patchhole, front end face is recessed to form backward the viewport that a rear end is connected with stem patchhole, be recessed to form an embedding groove downwards in the middle part of upper surface simultaneously, and the right side of embedding groove is the inclined-plane of upper end flare, bottom surface is the inclined-plane that right-hand member has a down dip; Be inserted in stem patchhole after the lower end of terminal stud runs through main body left part from the top down, and can move up and down; It is shaft-like for controlling button, and middle part is formed with an adjustment hole, utilize the method that the two ends stationary shaft be fixed on embedding groove front-rear side walls runs through adjustment hole to be fixed in embedding groove by control button, and the left end controlling button is connected with terminal stud top; The lower end of energy-stored spring is fixed on embedding groove right-hand member bottom surface, and setting direction is parallel with embedding groove right side; Spacer pin is fixed on top, embedding groove right side, and is positioned at energy-stored spring upper end, and the right-hand member simultaneously controlling button is inserted in spacer pin in the mode be slidably connected.
Described adjustment hole is slotted hole, is positioned at apart from controlling button right-hand member 1/3 place, and it is long-armed for controlling the position be positioned on the left of adjustment hole on button, and the position on right side is galianconism.
Described terminal stud lower end diameter is less than the fixed orifice diameter of stem outer end on bottom shielding of bushing earthing device.
Angle between described embedding groove right side and surface level is 101.5 °, and the angle simultaneously controlled between the right side of button and surface level is also 101.5 °.
Described terminal stud adopts brass material to make, and upper end is provided with the handle for connection of test lead on clamping dielectric loss electric bridge.
The external port diameter of described stem patchhole is greater than the diameter of stem on bottom shielding of bushing earthing device, is less than the external diameter of ground sleeve simultaneously.
Bottom shielding of bushing earthing device multi-functional auxiliary testing instrument provided by the invention has following beneficial effect: can solve the drawback of bottom shielding of bushing earthing device in sleeve pipe dielectric loss and megger test work, stopping the potential safety hazard of transformer after above-mentioned checking experiment work, having provided effective safety practice and technical guarantee for improving safety utilization of electric power reliability further.In addition, this instrument also has reasonable in design, uses easy to carry and low cost and other advantages.
Accompanying drawing explanation
Fig. 1 is a kind of 0HS3967 molded cannula end shield grounding device constructions longitudinal sectional view conventional at present.
Fig. 2 is the bottom shielding of bushing earthing device test mode schematic diagram shown in Fig. 1.
Fig. 3 bottom shielding of bushing earthing device provided by the invention multi-functional auxiliary testing tool construction longitudinal sectional view.
Fig. 4 is bottom shielding of bushing earthing device multi-functional auxiliary testing instrument using state schematic diagram provided by the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, bottom shielding of bushing earthing device multi-functional auxiliary testing instrument provided by the invention is described in detail.The parts identical with prior art adopt identical drawing reference numeral.
As shown in Figure 3, Figure 4, bottom shielding of bushing earthing device multi-functional auxiliary testing instrument provided by the invention comprises main body 12, terminal stud 13, stationary shaft 14, controls button 15, energy-stored spring 16 and spacer pin 17; Wherein main body 12 adopts oil impregnate nylon to make, cave inward in the middle part of left side and be formed with a stem patchhole 18, front end face is recessed to form backward the viewport 19 that a rear end is connected with stem patchhole 18, be recessed to form an embedding groove 20 downwards in the middle part of upper surface simultaneously, and the right side of embedding groove 20 is the inclined-plane of upper end flare, bottom surface is the inclined-plane that right-hand member has a down dip; Be inserted in stem patchhole 18 after the lower end of terminal stud 13 runs through main body 12 left part from the top down, and can move up and down; It is shaft-like for controlling button 15, middle part is formed with an adjustment hole 21, utilize the method that the two ends stationary shaft 14 be fixed on embedding groove 20 front-rear side walls runs through adjustment hole 21 to be fixed in embedding groove 20 by control button 15, and the left end controlling button 15 is connected with terminal stud 13 top; The lower end of energy-stored spring 16 is fixed on embedding groove 20 right-hand member bottom surface, and setting direction is parallel with embedding groove 20 right side; Spacer pin 17 is fixed on top, embedding groove 20 right side, and is positioned at energy-stored spring 16 upper end, and the right-hand member simultaneously controlling button 15 is inserted in spacer pin 17 in the mode be slidably connected.
Described adjustment hole 21 is slotted hole, is positioned at apart from controlling button 15 right-hand member 1/3 place, and it is long-armed for controlling the position be positioned on the left of adjustment hole 21 on button 15, and the position on right side is galianconism.
Described terminal stud 13 lower end diameter is less than fixed orifice 4 diameter of stem 5 outer end on bottom shielding of bushing earthing device.
Angle between described embedding groove 20 right side and surface level is 101.5 °, and the angle simultaneously controlled between the right side of button 15 and surface level is also 101.5 °.
Described terminal stud 13 adopts brass material to make, and upper end is provided with the handle for connection 23 of test lead on clamping dielectric loss electric bridge.
The external port diameter of described stem patchhole 18 is greater than the diameter of stem 5 on bottom shielding of bushing earthing device, is less than the external diameter of ground sleeve 3 simultaneously.
Now bottom shielding of bushing earthing device multi-functional auxiliary testing instrument using method provided by the invention is described below: when needs utilize this multi-functional auxiliary testing instrument to carry out sleeve pipe dielectric loss and megger test to bottom shielding of bushing earthing device, first galianconism multi-functional auxiliary testing instrument controlling button 15 is pressed by tester, then by the outer end of stem 5 on the external port alignment sleeve end shield earthing device of stem patchhole 18 in main body 12, promote main body 12 inwards afterwards, at this moment the ground sleeve 3 on bottom shielding of bushing earthing device moves inward under the effect at stem patchhole 18 external port edge along stem 5, tester observes the position of fixed orifice 4 on stem 5 by viewport 19 in the process, when terminal stud 13 lower end is positioned at above fixed orifice 4 just, unclamp and control button 15, at this moment the galianconism outer end on control button 15 is by pan-up under the effect of energy-stored spring 16 and spacer pin 17, if galianconism moving distance is 2 millimeters, compare for 2:1 due to long-armed with the length of galianconism, the long-armed outer end be so connected with terminal stud 13 will move down 4 millimeters, the lower end of terminal stud 13 is driven to be inserted in the fixed orifice 4 on stem 5 thus, at this moment the lower end of terminal stud 13 is squeezed in the fixed orifice 4 of stem 5 by under the effect of spring 9 by ground sleeve 3, make terminal stud 13 and stem 5 Contact good, to guarantee that measuring-signal is unaffected, finally on the handle for connection 23 of terminal stud 13 upper end, the test lead of clamping dielectric loss electric bridge just can start to carry out test job.
In addition, because adjustment hole 21 is slotted hole, therefore when pressing the galianconism on pressure-controlled button 15, galianconism brachium can on the right side of embedding groove 20 inclined-plane effect under trace shorten, to finely tune galianconism brachium, and the fine setting of galianconism brachium be just long-armed need maintain terminal stud 13 keep moving required trim lengths vertically.Spacer pin 17 both can ensure the vertical range controlling button 15, can keep again, control the sense of displacement of terminal stud 13, come off to prevent it.When unclamping control button 15, under the effect of energy-stored spring 16 and adjustment hole 21, terminal stud 13 still can be kept vertically to move down, this is because the setting angle of energy-stored spring 16 is identical with the angle of inclination of embedding groove 20 right side, therefore it can produce elastic force obliquely upward, and this power can make control button 15 and terminal stud 13 reset rapidly.
In addition, because main body 12 adopts oil impregnate nylon to make, therefore the lubricating oil under the squeezing action of ground sleeve 3 and spring 9 on it will be transferred in the annular space between stem 5 and ground sleeve 3, thus can play the lubrication between stem 5 and ground sleeve 3, fundamentally solve ground sleeve 3 to slide not smooth disadvantage along stem 5, reach ground sleeve 3 and the object of earth point good earth, ensure the safe and stable operation of transformer.
Claims (6)
1. a bottom shielding of bushing earthing device multi-functional auxiliary testing instrument, is characterized in that: it comprises main body (12), terminal stud (13), stationary shaft (14), controls button (15), energy-stored spring (16) and spacer pin (17); Wherein main body (12) adopts oil impregnate nylon to make, cave inward in the middle part of left side and be formed with a stem patchhole (18), front end face is recessed to form backward the viewport (19) that a rear end is connected with stem patchhole (18), be recessed to form an embedding groove (20) downwards in the middle part of upper surface simultaneously, and the right side of embedding groove (20) is the inclined-plane of upper end flare, and bottom surface is the inclined-plane that right-hand member has a down dip; Be inserted in stem patchhole (18) after the lower end of terminal stud (13) runs through main body (12) left part from the top down, and can move up and down; Control button (15) for shaft-like, middle part is formed with an adjustment hole (21), utilize method that the two ends stationary shaft (14) be fixed on embedding groove (20) front-rear side walls runs through adjustment hole (21) will control button (15) to be fixed in embedding groove (20), and the left end controlling button (15) is connected with terminal stud (13) top; The lower end of energy-stored spring (16) is fixed on embedding groove (20) right-hand member bottom surface, and setting direction is parallel with embedding groove (20) right side; Spacer pin (17) is fixed on embedding groove (20) top, right side, and being positioned at energy-stored spring (16) upper end, the right-hand member simultaneously controlling button (15) is inserted in spacer pin (17) in the mode be slidably connected.
2. bottom shielding of bushing earthing device multi-functional auxiliary testing instrument according to claim 1, it is characterized in that: described adjustment hole (21) is slotted hole, be positioned at apart from controlling button (15) right-hand member 1/3 place, the position controlling button (15) is positioned at adjustment hole (21) left side is long-armed, and the position on right side is galianconism.
3. bottom shielding of bushing earthing device multi-functional auxiliary testing instrument according to claim 1, is characterized in that: described terminal stud (13) lower end diameter is less than fixed orifice (4) diameter of stem (5) outer end on bottom shielding of bushing earthing device.
4. bottom shielding of bushing earthing device multi-functional auxiliary testing instrument according to claim 1, it is characterized in that: the described angle of embedding groove (20) between right side and surface level is 101.5 °, the angle simultaneously controlled between the right side of button (15) and surface level is also 101.5 °.
5. bottom shielding of bushing earthing device multi-functional auxiliary testing instrument according to claim 1, it is characterized in that: described terminal stud (13) adopts brass material to make, and upper end is provided with the handle for connection (23) of test lead on clamping dielectric loss electric bridge.
6. bottom shielding of bushing earthing device multi-functional auxiliary testing instrument according to claim 1, it is characterized in that: the external port diameter of described stem patchhole (18) is greater than the diameter of stem (5) on bottom shielding of bushing earthing device, is less than the external diameter of ground sleeve (3) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510368924.1A CN104965128B (en) | 2015-06-29 | 2015-06-29 | Bottom shielding of bushing earthing or grounding means multi-functional auxiliary testing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510368924.1A CN104965128B (en) | 2015-06-29 | 2015-06-29 | Bottom shielding of bushing earthing or grounding means multi-functional auxiliary testing instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104965128A true CN104965128A (en) | 2015-10-07 |
| CN104965128B CN104965128B (en) | 2017-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510368924.1A Active CN104965128B (en) | 2015-06-29 | 2015-06-29 | Bottom shielding of bushing earthing or grounding means multi-functional auxiliary testing instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204289A (en) * | 2021-11-19 | 2022-03-18 | 国网山西省电力公司电力科学研究院 | Capacitive bushing end screen grounding device |
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Cited By (2)
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| CN104965128B (en) | 2017-09-15 |
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