CN111244812A - Portable grounding device for insulating overhead ground wire - Google Patents
Portable grounding device for insulating overhead ground wire Download PDFInfo
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- CN111244812A CN111244812A CN201911222532.9A CN201911222532A CN111244812A CN 111244812 A CN111244812 A CN 111244812A CN 201911222532 A CN201911222532 A CN 201911222532A CN 111244812 A CN111244812 A CN 111244812A
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- insulating
- reed
- push rod
- short circuit
- hole
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
Abstract
The invention discloses a portable grounding device for an insulated overhead ground wire, which comprises: the device comprises an insulating operating rod, a resistor, a grounding chuck, a short-circuit chuck, an insulating push rod, a short-circuit clamping needle, a first grounding wire and a second grounding wire, wherein the resistance value of the resistor is 100 k-200 k omega; one end connecting resistance's of insulating bar one end, ground connection chuck and short circuit chuck are connected to the other end of resistance, the lateral wall of the one end of insulating bar extends there is first mount, first mount has first through-hole, first through-hole faces the short circuit chuck, first through-hole is passed to the one end of insulating push rod, insulating push rod can round trip movement and rotation in first through-hole, short circuit card needle is connected to the one end of insulating push rod, short circuit card needle can insert in the short circuit chuck, the one end connecting resistance of first earth connection, the other end of first earth connection is used for ground connection, the one end connecting resistance of second earth connection, short circuit card needle is connected to the other end of second earth connection. The invention can avoid the electric arc damage generated when the operating personnel is initially grounded.
Description
Technical Field
The invention relates to the technical field of grounding devices, in particular to a portable grounding device for an insulated overhead ground wire.
Background
The insulated overhead ground wire is arranged above a power transmission line tower and is a line laid for preventing the power transmission line from being directly struck by lightning. Simultaneously, in order to avoid the electric energy loss, select a bit ground connection in certain length, other places are insulating to ground: namely, the tower body is directly connected with the tower only at a certain point, and the other places are connected with the tower body in parallel through a discharge gap. When the induced voltage exceeding a certain limit value is generated on the insulated overhead ground wire due to the induction thunder or the grounding short circuit fault of the conducting wire, the discharge gap is conducted, so that the insulated overhead ground wire is directly connected with the tower (the tower is grounded), and excessive energy is released.
National grid company enterprise standard (Q/GDW 1799.2-2013 national grid company electric safety work code line part) clause 8.4.4 specifies explicitly: the insulated overhead earth wire should be considered as a charged body. When the operation is carried out near the insulated overhead ground wire, the distance between an operator and the insulated overhead ground wire is not less than 0.4 m. If the operation is needed on the insulated overhead ground wire, the ground wire is applied to reliably ground the insulated overhead ground wire or the insulated overhead ground wire is operated in an equipotential mode.
The conventional line maintenance is divided into two types, one is live working, namely, working under the condition that a power transmission line or an insulated overhead ground wire is electrified. If the equipotential mode is not adopted, the overhead ground wire needs to be reliably grounded. The other is power-off operation. For the wire, in order to prevent the wire from suddenly coming, it is necessary to reliably ground the wire before working to protect personal safety. Similarly, the insulated overhead ground wire may be a charged body due to a lightning strike, induction of a current due to a charged wire, or the like, and therefore, it is necessary to be grounded.
When the voltage is high, electric sparks are generated at the moment of direct grounding by the complete set of grounding wires, and maintainers are possibly hurt because induced voltage (during live working, or when the wire is in power failure but other lines cross a power failure line, or when one maintenance line and one operation line of the same-tower double-circuit line are in operation) exists on the insulated overhead grounding wire.
Disclosure of Invention
The embodiment of the invention provides a portable grounding device for an insulated overhead ground wire, which aims to solve the problems that electric sparks are generated at the moment when a complete set of ground wire is directly grounded in the prior art, and a maintainer is possibly injured.
The embodiment of the invention discloses a portable grounding device for an insulated overhead ground wire, which comprises: the device comprises an insulating operating rod, a resistor, a grounding chuck, a short-circuit chuck, an insulating push rod, a short-circuit clamping needle, a first grounding wire and a second grounding wire, wherein the resistance value of the resistor is 100 k-200 k omega; the one end of insulating bar is connected the one end of resistance, the other end of resistance is connected ground connection chuck with the short circuit chuck, the lateral wall extension of the one end of insulating bar has first mount, first mount has first through-hole, first through-hole faces the short circuit chuck, the one end of insulating push rod is passed first through-hole, just insulating push rod can round trip movement and rotation in the first through-hole, the one end of insulating push rod is connected the short circuit card needle, the short circuit card needle can insert in the short circuit chuck, the one end of first earth connection is connected resistance, the other end of first earth connection is used for ground connection, the one end of second earth connection is connected resistance, the other end of second earth connection is connected the short circuit card needle.
Further: the short circuit clamp head is composed of an L-shaped support, a first reed and a second reed, one end of one side arm of the L-shaped support is connected with the other end of the resistor, the other side arm of the L-shaped support is opposite to the first fixing frame, the first reed and the second reed are arranged in a close-fitting mode, one end of the first reed and one end of the second reed are connected with the other side arm of the L-shaped support, and the second reed is closer to one side wall of the L-shaped support than the first reed.
Further, the portable grounding device for an insulated overhead ground wire further comprises: and the two ends of the spring are respectively connected with the second reed and one side arm of the L-shaped support.
Further: the insulating push rod is fixedly sleeved with an annular separation blade, the annular separation blade is located between the first fixing frame and one end of the insulating push rod, and the outer diameter of the annular separation blade is larger than the aperture of the first through hole.
Further: the side wall of the other end of the insulating operating rod extends to form a second fixing frame, the second fixing frame is provided with a second through hole, the second fixing frame is opposite to the first fixing frame, the second through hole is opposite to the first through hole, and the insulating push rod penetrates through the second through hole and can move and rotate in the second through hole.
Further, the portable grounding device for an insulated overhead ground wire further comprises: the bumping post, the one end of bumping post is connected the lateral wall of insulating push rod, and is close to insulating push rod's the other end, one side of second through-hole is extended there is the bumping post to lead to the groove, the bumping post can be along with insulating push rod's removal is passed the bumping post leads to the groove, works as short circuit card needle card is gone into completely during the short circuit chuck, the bumping post is located the second mount with first mount is relative on the surface.
Further, the portable grounding device for an insulated overhead ground wire further comprises: the insulating operating rod comprises a first insulating handle, one end of the first insulating handle is connected with the other end of the insulating operating rod, and an annular insulating sheath is sleeved at one end of the first insulating handle.
Further, the portable grounding device for an insulated overhead ground wire further comprises: one end of the second insulating handle is connected with the other end of the insulating push rod, and a cylindrical insulating handle is arranged on the side wall of one end of the second insulating handle.
Further: the grounding clamp head is composed of a U-shaped support, a third reed and a fourth reed, one end of one side arm of the U-shaped support is connected with the other end of the resistor, the third reed and the fourth reed are arranged in a relatively close-fitting mode, the third reed and the fourth reed are respectively connected with the inner surfaces of two side walls of the U-shaped support, and one end of the third reed and one end of the fourth reed are connected with the bottom of the U-shaped support.
Further: the first grounding wire and the second grounding wire are copper wires, and the cross sectional area of the first grounding wire and the cross sectional area of the second grounding wire are 15mm2。
The portable grounding device for the insulated overhead ground wire is specially used for the insulated overhead ground wire of the ultra-high voltage transmission line, can avoid electric arc damage possibly generated when an operator is initially grounded, can flexibly switch two grounding modes of direct grounding and grounding through a resistor, and is convenient to carry.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural view of a portable grounding device for an insulated overhead ground wire according to an embodiment of the present invention;
fig. 2 is a partial structural plan view of a portable grounding device for insulated overhead ground wires in accordance with an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a portable grounding device for an insulated overhead ground wire. Specifically, as shown in fig. 1 and 2, the portable grounding device for an insulated overhead ground wire includes: insulating action bars 1, resistance 2, ground connection chuck 3, short circuit chuck 4, insulating push rod 5, short circuit card needle 6, first earth connection 7 and second earth connection 8.
The insulating operating rod 1 can be a hard hollow rod, so that the weight is light and the carrying is convenient. In a preferred embodiment of the invention, the length of the insulating operating rod 1 is 2-3 m, so that close contact between an operator and a live wire can be avoided, and the condition that the operator cannot reach the insulating overhead ground wire on a tower is avoided. For example, the insulating operation rod 1 is a composite insulating tube having an outer diameter of 32 × 2mm and a length of 2 m. The insulating operating rod 1 can be manufactured into at least 2 sections, and is convenient for personnel to carry. The insulating push rod 5 can be an insulating tube made of composite materials with the outer diameter of 20 multiplied by 2mm and the length of 1.6 m. The grounding chuck 3 is made of aluminum alloy. The shorting clip 4 may be made of 5mm thick copper. The first ground line 7 and the second ground line 8 are both copper wires.
One end of the insulated operating rod 1 is connected with one end of the resistor 2. The other end of the resistor 2 is connected to the ground clip 3 and the shorting clip 4. A first fixing frame 9 extends from the side wall of one end of the insulating operating rod 1. The first fixing frame 9 may be made of insulating material. The first fixing frame 9 has a first through hole. The first through hole is opposite the shorting clip 4. One end of the insulating push rod 5 passes through the first through hole, and the insulating push rod 5 can move and rotate back and forth in the first through hole. One end of the insulating push rod 5 is connected with a short-circuit clamping needle 6. A short circuit clamping needle 6 can be inserted into the short circuit clamping head 4. One end of the first ground line 7 is connected to the resistor 2, and the other end of the first ground line 7 is a free end for grounding. Preferably, the first ground wire 7 may be selectively provided outside the insulated operating rod 1, and since the insulated operating rod 1 may have a hollow structure, the first ground wire 7 may be provided in the insulated operating rod 1. One end of the second grounding wire 8 is connected with the resistor 2, and the other end of the second grounding wire 8 is connected with the short-circuit clamping pin 6. The switching of the two grounding modes can be realized through the grounding clamp 3, the short-circuit clamp 4, the first grounding wire 7 and the second grounding wire 8.
Wherein the resistance value of the resistor 2 is 100 k-200 k omega. Because the insulation overhead ground wire is originally provided with higher voltage, electric arc can be generated when the insulation overhead ground wire is suddenly grounded, and the resistance can limit arc light damage which can be generated when the insulation overhead ground wire is suddenly grounded, one end of the insulation operating rod 1 is connected with a 100 k-200 k omega resistance 2 in series to discharge current, and after 5-10 seconds, the insulation operating rod is switched into a conventional direct grounding mode, so that the insulation overhead ground wire is reliably limited at the ground potential for a long time, and the safety of personnel operating on the insulation overhead ground wire is ensured.
Through this a portable earthing device for insulating overhead earth wire, ground chuck 3 articulates to insulating overhead earth wire on, makes insulating overhead earth wire card go into ground chuck 3 to the electric current passes through first earth connection 7 of resistance 2 intercommunication, and first earth connection 7 reliably contacts with transmission tower, carries out the charge release, prevents to produce electric arc. After 5-10 seconds, the short-circuit clamping pin 6 connected with the insulating push rod 5 is inserted into the short-circuit clamping head 4 to short-circuit the resistor 2, so that the insulating overhead ground wire is kept in short circuit and becomes directly grounded, the insulating overhead ground wire is limited to the ground potential for a long time and reliably, and the safety of personnel operating on the insulating overhead ground wire is guaranteed.
Preferably, since the induced current value on the insulated overhead ground wire is much smaller than that of the A, B, C three-phase conductor, the cross section of the first ground wire 7 and the second ground wire 8 used does not need to be too large to reduce the overall weight of the device. For example, the cross-sectional area of the first ground line 7 and the second ground line 8 is 15mm2。
Specifically, the short-circuit chuck 4 consists of an L-shaped bracket, a first spring plate and a second spring plate. One end of one side arm of the L-shaped bracket is connected with the other end of the resistor 2. The other side arm of the L-shaped bracket is opposite to the first fixing frame 9. The first reed and the second reed are arranged in a relatively close-fitting manner, and one end of the first reed and one end of the second reed are both connected with the other side arm of the L-shaped support. The second spring is closer to one side wall of the L-shaped bracket than the first spring. Through foretell structural design, short circuit card needle 6 card is gone into between first reed and the second reed of short circuit chuck 4 to be favorable to making short circuit card needle 6 and short circuit connect 4 reliable in close contact, avoid virtual the connecing.
Preferably, the portable grounding device for an insulated overhead ground wire further comprises: and the spring 10 is positioned between the second spring leaf and one side arm of the L-shaped bracket. Two ends of the spring 10 are respectively connected with the second spring leaf and one side arm of the L-shaped bracket.
Through setting up spring 10, when short circuit card needle 6 card goes into between first reed and the second reed of short circuit chuck 4, under spring 10's elastic force effect, more be favorable to short circuit chuck 4 to tightly clip short circuit card needle 6, avoid in the in-process of maintenance operation, short circuit card needle 6 drops from short circuit chuck 4.
Specifically, the grounding clamp 3 is composed of a U-shaped bracket, a third spring plate and a fourth spring plate. One end of one side arm of the U-shaped bracket is connected with the other end of the resistor 2. The third reed and the fourth reed are arranged relatively and closely. The third reed and the fourth reed are respectively connected with the inner surfaces of two side walls of the U-shaped support, and one end of the third reed and one end of the fourth reed are both connected with the bottom of the U-shaped support.
Through foretell structural design, insulating overhead earth wire can make things convenient for more and firmly block between the third reed and the fourth reed of ground connection chuck 3, is favorable to avoiding insulating overhead earth wire to drop from ground connection chuck 3.
Preferably, the insulating push rod 5 is fixedly sleeved with an annular baffle plate 11. The annular baffle plate 11 is positioned between the first fixing frame 9 and one end of the insulating push rod 5. The outer diameter of the annular baffle plate 11 is larger than the aperture of the first through hole.
Through setting up annular separation blade 11, can carry on spacingly to insulating push rod 5, avoid insulating push rod 5 roll-off to drop from first through-hole.
Preferably, a second fixing frame 12 extends from a side wall of the other end of the insulated operating rod 1. The second fixing frame 12 may be made of insulating material. The second fixing frame 12 has a second through hole. The second fixing frame 12 is opposite to the first fixing frame 9. The second through hole is opposite to the first through hole. The insulating push rod 5 penetrates through the second through hole and can move back and forth and rotate in the second through hole. The portable grounding device further comprises: a stop pillar 13. One end of the barrier column 13 is connected with the side wall of the insulating push rod 5 and is close to the other end of the insulating push rod 5. A stud through slot 14 extends from one side of the second through hole. The post through slot 14 is sized to match the post 13. The barrier post 13 may pass through the barrier post through-groove 14 as the insulating push rod 5 moves. When the short circuit clamping needle 6 is completely clamped into the short circuit clamping head 4, the stop column 13 is positioned on the surface of the second fixing frame 12 opposite to the first fixing frame 9.
Through the design of the structure, when the insulating push rod 5 is pushed to be close to the short-circuit chuck 4, the stop pillar 13 can be rotated in advance to face the stop pillar through groove 14, so that the stop pillar 13 cannot limit the movement of the insulating push rod 5. After the short circuit clamping needle 6 is completely clamped into the short circuit chuck 4, the insulating push rod 5 can be rotated, so that the retaining column 13 is not just opposite to the retaining column through groove 14, the second fixing frame 12 can support the retaining column 13, the short circuit clamping needle 6 is further prevented from falling off from the short circuit chuck 4, and the insulating push rod 5 can be prevented from sliding downwards.
In addition, this portable earthing device for insulating overhead earth wire still includes: a first insulated handle 15 and a second insulated handle 16. One end of the first insulating handle 15 is connected to the other end of the insulating operating rod 1. One end of the first insulating handle 15 is sleeved with an annular insulating sheath 17. The annular insulating sheath 17 may be of rubber material. One end of the second insulating handle 16 is connected with the other end of the insulating push rod 5. The sidewall of one end of the second insulated handle 16 is provided with a cylindrical insulated handle 18. By providing the first insulated handle 15 and the second insulated handle 16 for the maintenance personnel to hold, electric shock which may occur is avoided.
The portable grounding device for the insulated overhead ground wire is used in the following process: before the operator works, the three-phase wires are hung A, B, C in sequence and then are led to the insulated overhead ground wire. The operator articulates the grounding chuck 3 of the grounding device to the insulating overhead ground wire and forces the insulating overhead ground wire to be clamped between the third reed and the fourth reed of the grounding chuck 3, so that the current is communicated with the first grounding wire 7 through the resistor 2 to release charges and prevent electric arcs. After 5-10 seconds, the operator pushes the insulating push rod 5 to move upwards (the stop column 13 faces the stop column through groove 14 at the moment), so that the short-circuit clamping pin 6 is inserted into the first reed and the second reed of the short-circuit chuck 4 to short-circuit the resistor 2, and the insulating overhead ground wire is kept in short circuit, thereby becoming direct grounding and realizing the switching of the grounding mode. The operating personnel can rotate insulating push rod 5, makes bumping post 13 not align with bumping post logical groove 14, and second mount 12 supports bumping post 13 to pin insulating push rod 5, accomplish insulating overhead earth's short circuit operation. After the overhaul is finished, the maintainer can rotate the insulating push rod 5 to enable the retaining column 13 to face the retaining column through groove 14, the insulating push rod 5 is pulled downwards to enable the short circuit clamping needle 6 to be separated from the short circuit chuck 4, then upward force is applied to the insulating operating rod 1 to enable the insulating overhead ground wire to be separated from the grounding chuck 3, and the portable grounding device for the insulating overhead ground wire can be taken down.
In summary, the portable grounding device for the insulated overhead ground wire of the embodiment of the invention is specially used for the insulated overhead ground wire of the ultra-high voltage transmission line, can avoid the electric arc injury possibly generated when an operator is initially grounded, can flexibly switch two grounding modes of direct grounding and grounding through a resistor, and is convenient to carry.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A portable grounding device for insulated overhead ground wire comprising: the device comprises an insulating operating rod, a resistor, a grounding chuck, a short-circuit chuck, an insulating push rod, a short-circuit clamping needle, a first grounding wire and a second grounding wire, wherein the resistance value of the resistor is 100 k-200 k omega;
the one end of insulating bar is connected the one end of resistance, the other end of resistance is connected ground connection chuck with the short circuit chuck, the lateral wall extension of the one end of insulating bar has first mount, first mount has first through-hole, first through-hole faces the short circuit chuck, the one end of insulating push rod is passed first through-hole, just insulating push rod can round trip movement and rotation in the first through-hole, the one end of insulating push rod is connected the short circuit card needle, the short circuit card needle can insert in the short circuit chuck, the one end of first earth connection is connected resistance, the other end of first earth connection is used for ground connection, the one end of second earth connection is connected resistance, the other end of second earth connection is connected the short circuit card needle.
2. The portable grounding device for an insulated overhead ground wire of claim 1, wherein: the short circuit clamp head is composed of an L-shaped support, a first reed and a second reed, one end of one side arm of the L-shaped support is connected with the other end of the resistor, the other side arm of the L-shaped support is opposite to the first fixing frame, the first reed and the second reed are arranged in a close-fitting mode, one end of the first reed and one end of the second reed are connected with the other side arm of the L-shaped support, and the second reed is closer to one side wall of the L-shaped support than the first reed.
3. The portable grounding device for insulated overhead ground wires of claim 2, further comprising: and the two ends of the spring are respectively connected with the second reed and one side arm of the L-shaped support.
4. The portable grounding device for an insulated overhead ground wire of claim 1, wherein: the insulating push rod is fixedly sleeved with an annular separation blade, the annular separation blade is located between the first fixing frame and one end of the insulating push rod, and the outer diameter of the annular separation blade is larger than the aperture of the first through hole.
5. The portable grounding device for an insulated overhead ground wire of claim 1, wherein: the side wall of the other end of the insulating operating rod extends to form a second fixing frame, the second fixing frame is provided with a second through hole, the second fixing frame is opposite to the first fixing frame, the second through hole is opposite to the first through hole, and the insulating push rod penetrates through the second through hole and can move and rotate in the second through hole.
6. The portable grounding device for insulated overhead ground wires of claim 5, further comprising: the bumping post, the one end of bumping post is connected the lateral wall of insulating push rod, and is close to insulating push rod's the other end, one side of second through-hole is extended there is the bumping post to lead to the groove, the bumping post can be along with insulating push rod's removal is passed the bumping post leads to the groove, works as short circuit card needle card is gone into completely during the short circuit chuck, the bumping post is located the second mount with first mount is relative on the surface.
7. The portable grounding device for insulated overhead ground wires of claim 1, further comprising: the insulating operating rod comprises a first insulating handle, one end of the first insulating handle is connected with the other end of the insulating operating rod, and an annular insulating sheath is sleeved at one end of the first insulating handle.
8. The portable grounding device for insulated overhead ground wires of claim 1, further comprising: one end of the second insulating handle is connected with the other end of the insulating push rod, and a cylindrical insulating handle is arranged on the side wall of one end of the second insulating handle.
9. The portable grounding device for an insulated overhead ground wire of claim 1, wherein: the grounding clamp head is composed of a U-shaped support, a third reed and a fourth reed, one end of one side arm of the U-shaped support is connected with the other end of the resistor, the third reed and the fourth reed are arranged in a relatively close-fitting mode, the third reed and the fourth reed are respectively connected with the inner surfaces of two side walls of the U-shaped support, and one end of the third reed and one end of the fourth reed are connected with the bottom of the U-shaped support.
10. The portable grounding device for an insulated overhead ground wire of claim 1, wherein: the first grounding wire and the second grounding wire are copper wires, and the cross sectional area of the first grounding wire and the cross sectional area of the second grounding wire are 15mm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911222532.9A CN111244812A (en) | 2019-12-03 | 2019-12-03 | Portable grounding device for insulating overhead ground wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911222532.9A CN111244812A (en) | 2019-12-03 | 2019-12-03 | Portable grounding device for insulating overhead ground wire |
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| Publication Number | Publication Date |
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| CN111244812A true CN111244812A (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911222532.9A Pending CN111244812A (en) | 2019-12-03 | 2019-12-03 | Portable grounding device for insulating overhead ground wire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113948888A (en) * | 2021-10-19 | 2022-01-18 | 国家电网有限公司 | Grounding wire device for overhead cable |
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2019
- 2019-12-03 CN CN201911222532.9A patent/CN111244812A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113948888A (en) * | 2021-10-19 | 2022-01-18 | 国家电网有限公司 | Grounding wire device for overhead cable |
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