CN205178463U - Can switch grounding box with electricity - Google Patents
Can switch grounding box with electricity Download PDFInfo
- Publication number
- CN205178463U CN205178463U CN201521049257.2U CN201521049257U CN205178463U CN 205178463 U CN205178463 U CN 205178463U CN 201521049257 U CN201521049257 U CN 201521049257U CN 205178463 U CN205178463 U CN 205178463U
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- Prior art keywords
- diverter switch
- protector
- switch
- cable
- coupled
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Abstract
The utility model discloses a can switch grounding box with electricity, including a change over switch, the 2nd change over switch and the 3rd change over switch, a change over switch and the 2nd change over switch are the double -throw switch, and interior all have first route and an alternate path, the 3rd change over switch is the single -throw switch, the 3rd change over switch's one end is coupled in the earth connection inlet wire port of external cable sheath, and the other end is coupled and has been coupled ground connection behind the cable sheath protector after the one end of a change over switch's alternate path, the 2nd change over switch has been coupled ground connection behind the 2nd cable sheath protector, a cable protector's voltage progression is different with the 2nd cable sheath protector's voltage progression. The utility model discloses a can switch grounding box with electricity through a change over switch, the 2nd change over switch and the 3rd change over switch and a cable protector and the 2nd cable protector's setting, just can effectual realization switch over the effect of grounding box's voltage progression with electricity.
Description
Technical field
The utility model relates to a kind of power equipment, and relating to one in particular can charged switching grounding box.
Background technology
Earthing box for electric cable is applied in 35kv and above single-core cable grounding system more and uses, because earthing box for electric cable sealing is poor, construction link is not tight for control, current earthing box for electric cable is often because of overcurrent, make moist, the factors such as product quality affect induced malfunction, in recent years earthing box for electric cable Frequent Troubles, cause electrical network to be forced to interruption maintenance, bring great economic loss to power supply client simultaneously.Carry out in maintenance process at circuit, relate to power failure cooperation personnel numerous, to have a power failure grid switching operation comprising operations staff, maintainer's defect elimination, dispatcher orders, and circuit personnel protect electricity etc., add the loss of workload and manpower and materials.
Interconnected and the ground connection of cable metal sheath one end three-phase, the other end is earth-free, when lightning wave or internal overvoltage flow along cable core, the earth-free end of cable metal sheath there will be higher impulse overvoltage, or when system short-circuit fault current flows through cable core, the earth-free end of its sheath there will be very high line-frequency induction overvoltage.Above-mentioned overvoltage may puncture protective coverings of cable insulation, causes cable metal sheath multipoint earth faults, has a strong impact on power cable and normally runs and even significantly reduce cable useful life.Therefore according to power industry standard DL/T401-2002, (high voltage power cable selects the regulation of directive/guide that cable protective layer protector must be adopted to limit induced voltage on power cable metal sheath and false voltage, and existing cable protective layer protector is merely able to protect certain electric pressure, the cable protective layer protector that multiple voltage grade is set just is needed in the grounding box needing multiple electric pressure, so just can increase the cost of manufacture of grounding box, and existing cable protective layer protector is all fixedly connected with between outside line, therefore a kind of electric pressure circuit can only connect a kind of cable protective layer protector, in time there is change in the electric pressure of this circuit, so cable protective layer protector just can not effectively protect this circuit.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model be to provide a kind of can change cable protective layer protector electric pressure can charged switching grounding box.
For achieving the above object, the utility model provides following technical scheme: one can charged switching grounding box, comprise the first diverter switch, second diverter switch and the 3rd diverter switch, described first diverter switch and the second diverter switch are double-throw switch, inside all there is the first path and alternate path, described 3rd diverter switch is single-throw switch, one end of described 3rd diverter switch is coupled to the earth connection inlet wire port of external cable sheath, the other end is coupled with ground connection after the first cable protective layer protector after coupling one end of the alternate path of the first diverter switch, first path one end of described first diverter switch couples the earth connection inlet wire port of external cable sheath, other end ground connection, one end of the earth connection inlet wire port of described 3rd diverter switch opposite outer cable sheath is also coupled to the first path and the alternate path of the second diverter switch, the other end is coupled to the first path of the first diverter switch, one end of first path of described second diverter switch is coupled to earth connection inlet wire port and the 3rd diverter switch of external cable sheath, other end ground connection, one end of the alternate path of described second diverter switch is coupled to earth connection inlet wire port and the 3rd diverter switch of external cable sheath, the other end is coupled with ground connection after the second cable protective layer protector, the voltage progression of described first cable protective layer protector is different from the voltage progression of the second cable protective layer protector.
As further improvement of the utility model, described first cable protective layer protector and the second cable protective layer protector include base and lid, described lid covers on base, described base is cylindric, its one end offers cylindrical grooves, described lid is in the form of annular discs, be embedded the notch place at groove, one end of described base groove dorsad is provided with conducting strip, the bottom land of described groove offers several for placing the standing groove of the piezo-resistance of multiple different size, the pad be electrically connected with piezo-resistance is provided with in each described standing groove, the notch place of described standing groove is provided with contact, described contact is electrically connected with the piezo-resistance be embedded in standing groove, described standing groove is at the bottom land of groove, circumferentially distribute using the center of circle of groove as axle center, the electric pressure being wherein embedded into the piezo-resistance of standing groove is ascending, distribution is expanded outwardly from axle center, described lid is provided with several contact chips contacted with contact towards one end of base, several contact chips described circumferentially distribute as the center of circle using the center of circle of lid at lid, the expanded spheres in order to outwards to be strutted by contact chip is provided with between several contact chips described, several contact chips described are all in the arc-shaped expanded outwardly, its side towards expanded spheres all offers the caulking groove of arc-shaped, described expanded spheres is embedded in caulking groove and contact chip fits tightly, described expanded spheres adopts insulating elastic material to make, inner hollow, and be filled with inflation fluid, one end of described lid base dorsad is provided with brace, described brace with conducting strip all offers the through hole be connected for outer lead, piezo-resistance voltage progression specification in described first cable protective layer protector is all not identical with the piezo-resistance voltage progression specification in the second cable protective layer protector.
As further improvement of the utility model, described inflation fluid is oil.
As further improvement of the utility model, described base side is provided with heat dissipating ring, and the thickness of described heat dissipating ring outwards successively decreases setting gradually.
The beneficial effects of the utility model, by the first diverter switch, the setting of the second diverter switch and the 3rd diverter switch, by the switching effect of three diverter switches, just can effectively realize the direct ground connection of earth connection inlet wire port of cable sheath, or by ground connection after the first cable protective layer protector, or by ground connection after the second cable protective layer protector, or one of them is by cable protective layer protector ground connection, the direct ground connection of the other end, realize cross connection grounding, so just can effectively achieve grounding box for the carrying out of different surge voltage progression change effect, the voltage progression avoiding the cable protective layer protector of existing grounding box inside cannot change a series of problem caused.
Accompanying drawing explanation
Fig. 1 be of the present utility model can the internal circuit diagram of charged switching grounding box;
Fig. 2 is the overall structure figure of the first cable protective layer protector and the second cable protective layer protector in Fig. 1;
Fig. 3 is the overall structure figure of lid in Fig. 2.
Embodiment
Below in conjunction with the embodiment given by accompanying drawing, the utility model is described in further detail.
Shown in 3, the one of the present embodiment can charged switching grounding box, comprise the first diverter switch QS1, second diverter switch QS2 and the 3rd diverter switch QS3, described first diverter switch QS1 and the second diverter switch QS2 is double-throw switch, inside all there is the first path 1 and alternate path 2, described 3rd diverter switch QS3 is single-throw switch, one end of described 3rd diverter switch QS3 is coupled to the earth connection inlet wire port of external cable sheath, the other end is coupled with the rear ground connection of the first cable protective layer protector 3 after coupling one end of the alternate path 2 of the first diverter switch QS1, first path 1 one end of described first diverter switch QS1 couples the earth connection inlet wire port of external cable sheath, other end ground connection, one end of the earth connection inlet wire port of described 3rd diverter switch QS3 opposite outer cable sheath is also coupled to the first path 1 and the alternate path 2 of the second diverter switch QS2, the other end is coupled to first path 1 of the first diverter switch QS1, one end of first path 1 of described second diverter switch QS2 is coupled to earth connection inlet wire port and the 3rd diverter switch QS3 of external cable sheath, other end ground connection, one end of the alternate path 2 of described second diverter switch QS2 is coupled to earth connection inlet wire port and the 3rd diverter switch QS3 of external cable sheath, the other end is coupled with the rear ground connection of the second cable protective layer protector 4, the voltage progression of described first cable protective layer protector 3 is different from the voltage progression of the second cable protective layer protector 4, in impulse current on cable sheath is very little, so we can by the first diverter switch QS1 conducting first path 1, second diverter switch QS2 is conducting first path 2 also, 3rd diverter switch disconnects, such impulse current will flow on the internal circuit of grounding box by the earth connection inlet wire port of external cable sheath, with reference to shown in Fig. 1, impulse current can flow into the earth through first path 1 of first path 1 of the first diverter switch QS1 and the second diverter switch QS2, when a road needs to increase voltage progression, time another road is unwanted, by the first diverter switch QS1 or the second diverter switch QS2 conducting alternate path 2, when a diverter switch conducting alternate path 2, another diverter switch disconnects, 3rd diverter switch QS3 conducting simultaneously, when the first diverter switch QS1 conducting alternate path 2, time second diverter switch QS2 disconnects, impulse current one tunnel will after the 3rd diverter switch QS3 again after the alternate path 2 of the first diverter switch QS1 after the first cable protective layer protector 3 ground connection, another road of impulse current will after the alternate path 2 of the first diverter switch QS1 after the first cable protective layer protector 3 ground connection, so just achieve the effect be linked into by the first cable protective layer protector 3 in grounding box, when its voltage progression compares direct ground connection before, naturally want high, same reason, when the second diverter switch QS2 conducting alternate path 2, time first diverter switch QS1 disconnects, second cable protective layer protector 4 will be linked into ground connection inside, because the voltage sum of series specification of the first cable protective layer protector 3 is all not identical with the voltage sum of series specification of the second cable protective layer protector 4, so change again the voltage progression of grounding box, when the equal conducting alternate path 2 of the first diverter switch QS1 and the second diverter switch QS2, time 3rd diverter switch QS3 disconnects, just can the first cable protective layer protector 3 and the second cable protective layer protector 4 be connected in circuit, change so again the voltage progression of grounding box, so just effectively achieving grounding box has direct ground connection, by the first cable protective layer protector 3 ground connection, by the second cable protective layer protector 4 ground connection and by the first cable protective layer protector 3 of parallel connection and the function of the second cable protective layer protector 4 ground connection, grounding box is made to have multiple voltage progression, compared to existing grounding box, just there is the function of switched voltage progression, avoid existing grounding box voltage progression and can not change the series of problems caused.
As a kind of embodiment improved, described first electric cable protector 3 and the second electric cable protector 4 include base 31 and lid 32, described lid 32 covers on base 31, described base 31 is in cylindric, its one end offers cylindrical grooves 311, described lid 32 is in the form of annular discs, be embedded the notch place at groove 311, one end of described base 31 groove 311 dorsad is provided with conducting strip 312, the bottom land of described groove 311 offers several for placing the standing groove 3111 of the piezo-resistance of multiple different size, the pad be electrically connected with piezo-resistance is provided with in each described standing groove 3111, the notch place of described standing groove 3111 is provided with contact 31111, described contact 31111 is electrically connected with the piezo-resistance be embedded in standing groove 3111, described standing groove 3111 is at the bottom land of groove 311, circumferentially distribute using the center of circle of groove 311 as axle center, the electric pressure being wherein embedded into the piezo-resistance of standing groove 3111 is ascending, distribution is expanded outwardly from axle center, described lid 32 is provided with several contact chips 321 contacted with contact 31111 towards one end of base 31, several contact chips 321 described circumferentially distribute as the center of circle using the center of circle of lid 32 at lid 32, the expanded spheres 33 in order to outwards to be strutted by contact chip 321 is provided with between several contact chips 321 described, several contact chips 321 described are all in the arc-shaped expanded outwardly, its side towards expanded spheres 33 all offers the caulking groove 3211 of arc-shaped, described expanded spheres 33 is embedded in caulking groove 3211 and contact chip 321 fits tightly, described expanded spheres 33 adopts insulating elastic material to make, inner hollow, and be filled with inflation fluid, one end of described lid 32 base 31 dorsad is provided with brace 322, described brace 322 with conducting strip 312 all offers the through hole 34 be connected for outer lead, piezo-resistance voltage progression specification in described first electric cable protector 3 is all not identical with the piezo-resistance voltage progression specification in the second electric cable protector 4, at impulse current in the first cable protective layer protector 3 and the second cable protective layer protector 4, this surge voltage will flow in brace 322 by earth connection port, then flow on contact chip 321 by brace 322, then by the contact between contact chip 321 and contact 31111, flow in the piezo-resistance of contact 31111 correspondence that now contact chip 321 contacts, wherein in time there is no impulse current, contact chip 321 contacts the piezo-resistance of minimum voltage progression, so piezo-resistance will conducting, impulse current is connect to the earth, and in the process of conducting, contact chip 321 will the evolution of heat, be passed in expanded spheres 33, inflation fluid so in expanded spheres 33 will expanded by heating, the volume of expanded spheres 33 is made to become large, strut contact chip 321, make contact chip 321 inside contact, the contact 31111 of minimum voltage progression expands outwardly, contact the contact 31111 of more high voltage progression gradually, corresponding piezo-resistance will be connected like this, select most suitable piezo-resistance to carry out earial drainage, the effect that the voltage progression effectively completing protector inside is changed, compared to cable protective layer protector of the prior art, there is better protected effect, and pass through the setting of caulking groove 3211, just make expanded spheres 33 can better and contact chip 321 contact.
As a kind of embodiment improved, described inflation fluid is oil, and oil is a kind of nonconducting liquid, can absorb more heat simultaneously, the problem of breaking with avoiding expanded spheres 33 excessive expansion here.
As a kind of embodiment improved; described base 31 side is provided with heat dissipating ring 313; the thickness of described heat dissipating ring 313 outwards successively decreases setting gradually; by the setting of heat dissipating ring 313; just effectively can realize the effect of a heat radiation to the heat of protector inside, avoid the problem that the too high protector caused of protector internal temperature damages.
In sum; of the present utility model can charged switching grounding box; by the setting of the first diverter switch QS1, the second diverter switch QS2, the 3rd diverter switch QS3, the first electric cable protector 3 and the second electric cable protector 4; just effectively can be grounded the effect that case has multiple switchable voltage progression; make grounding box can for the impulse current voltage progression of cable sheath; carry out corresponding corresponding Protective levels, avoid in prior art because voltage progression can not change the series of problems caused.
The above is only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. one kind can charged switching grounding box, it is characterized in that: comprise the first diverter switch (QS1), second diverter switch (QS2) and the 3rd diverter switch (QS3), described first diverter switch (QS1) and the second diverter switch (QS2) are double-throw switch, inside all there is the first path (1) and alternate path (2), described 3rd diverter switch (QS3) is single-throw switch, one end of described 3rd diverter switch (QS3) is coupled to the earth connection inlet wire port of external cable sheath, the other end is coupled with the first cable protective layer protector (3) ground connection afterwards after coupling one end of the alternate path (2) of the first diverter switch (QS1), the first path (1) one end of described first diverter switch (QS1) couples the earth connection inlet wire port of external cable sheath, other end ground connection, one end of the earth connection inlet wire port of described 3rd diverter switch (QS3) opposite outer cable sheath is also coupled to the first path (1) and the alternate path (2) of the second diverter switch (QS2), the other end is coupled to first path (1) of the first diverter switch (QS1), one end of first path (1) of described second diverter switch (QS2) is coupled to earth connection inlet wire port and the 3rd diverter switch (QS3) of external cable sheath, other end ground connection, one end of the alternate path (2) of described second diverter switch (QS2) is coupled to earth connection inlet wire port and the 3rd diverter switch (QS3) of external cable sheath, the other end is coupled with the second cable protective layer protector (4) ground connection afterwards, the voltage progression of described first electric cable protector (3) is different from the voltage progression of the second cable protective layer protector (4).
2. according to claim 1 can charged switching grounding box, it is characterized in that: described first electric cable protector (3) and the second electric cable protector (4) include base (31) and lid (32), described lid (32) covers on base (31), described base (31) is in cylindric, its one end offers cylindrical grooves (311), described lid (32) is in the form of annular discs, be embedded the notch place at groove (311), one end of described base (31) groove (311) dorsad is provided with conducting strip (312), the bottom land of described groove (311) offers several for placing the standing groove (3111) of the piezo-resistance of multiple different size, the pad be electrically connected with piezo-resistance is provided with in each described standing groove (3111), the notch place of described standing groove (3111) is provided with contact (31111), described contact (31111) is electrically connected with the piezo-resistance be embedded in standing groove (3111), described standing groove (3111) bottom land in groove (311), circumferentially distribute using the center of circle of groove (311) as axle center, the electric pressure being wherein embedded into the piezo-resistance of standing groove (3111) is ascending, distribution is expanded outwardly from axle center, described lid (32) is provided with several contact chips (321) contacted with contact (31111) towards one end of base (31), described several contact chips (321) circumferentially distribute as the center of circle using the center of circle of lid (32) at lid (32), the expanded spheres (33) in order to outwards to be strutted by contact chip (321) is provided with between described several contact chips (321), described several contact chips (321) are all in the arc-shaped expanded outwardly, its side towards expanded spheres (33) all offers the caulking groove (3211) of arc-shaped, described expanded spheres (33) is embedded in caulking groove (3211) and contact chip (321) fits tightly, described expanded spheres (33) adopts insulating elastic material to make, inner hollow, and be filled with inflation fluid, one end of described lid (32) base (31) dorsad is provided with brace (322), described brace (322) with conducting strip (312) all offers the through hole (34) be connected for outer lead, piezo-resistance voltage progression specification in described first electric cable protector (3) is all not identical with the piezo-resistance voltage progression specification in the second electric cable protector (4).
3. according to claim 2 can charged switching grounding box, it is characterized in that: described inflation fluid is oil.
4. according to claim 3 can charged switching grounding box, it is characterized in that: described base (31) side is provided with heat dissipating ring (313), the thickness of described heat dissipating ring (313) outwards successively decreases setting gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521049257.2U CN205178463U (en) | 2015-12-15 | 2015-12-15 | Can switch grounding box with electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521049257.2U CN205178463U (en) | 2015-12-15 | 2015-12-15 | Can switch grounding box with electricity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205178463U true CN205178463U (en) | 2016-04-20 |
Family
ID=55742401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521049257.2U Withdrawn - After Issue CN205178463U (en) | 2015-12-15 | 2015-12-15 | Can switch grounding box with electricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205178463U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429093A (en) * | 2015-12-15 | 2016-03-23 | 国网浙江省电力公司温州供电公司 | Earth box capable of achieving live-line switching |
| CN109412146A (en) * | 2018-10-17 | 2019-03-01 | 国网上海市电力公司 | A kind of cross interconnected on-line amending device and method of power cable |
| CN114928009A (en) * | 2022-06-21 | 2022-08-19 | 重庆泰山电缆有限公司 | High-voltage cable grounding box capable of being free of opening detection |
-
2015
- 2015-12-15 CN CN201521049257.2U patent/CN205178463U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429093A (en) * | 2015-12-15 | 2016-03-23 | 国网浙江省电力公司温州供电公司 | Earth box capable of achieving live-line switching |
| CN109412146A (en) * | 2018-10-17 | 2019-03-01 | 国网上海市电力公司 | A kind of cross interconnected on-line amending device and method of power cable |
| CN109412146B (en) * | 2018-10-17 | 2022-06-07 | 国网上海市电力公司 | Power cable cross-connection online correction device and method |
| CN114928009A (en) * | 2022-06-21 | 2022-08-19 | 重庆泰山电缆有限公司 | High-voltage cable grounding box capable of being free of opening detection |
| CN114928009B (en) * | 2022-06-21 | 2023-10-27 | 重庆泰山电缆有限公司 | High-voltage cable grounding box capable of being free from opening detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160420 Effective date of abandoning: 20171010 |
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| AV01 | Patent right actively abandoned |