CN104360162A - Live line measurement device for contact resistance of high voltage loop - Google Patents
Live line measurement device for contact resistance of high voltage loop Download PDFInfo
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- CN104360162A CN104360162A CN201410648584.3A CN201410648584A CN104360162A CN 104360162 A CN104360162 A CN 104360162A CN 201410648584 A CN201410648584 A CN 201410648584A CN 104360162 A CN104360162 A CN 104360162A
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- measurement device
- contact resistance
- housing
- live line
- line measurement
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Abstract
A live line measurement device for the contact resistance of a high voltage loop comprises a closed insulation shell, a voltage measurement device, a first shielding sleeve and a second shielding sleeve, wherein the voltage measurement device is arranged in the shell, and the first shielding sleeve and the second shielding sleeve are arranged on the shell in a sleeving mode. The voltage measurement device is provided with a first testing line and a second testing line which extend to the outside of the shell. The first testing line and the second testing line arranged outside the shell are correspondingly wrapped with a third shielding sleeve and a fourth shielding sleeve, the first shielding sleeve and the second shielding sleeve are correspondingly connected with the third shielding sleeve and the fourth shielding sleeve in a conductive mode, and the first shielding sleeve and the second shielding sleeve are arranged in a spaced mode to form a blocking gap. The first shielding sleeve is sleeved with a metal discharging lantern ring crossing the blocking gap, the front section of the metal discharging lantern ring and the outer peripheral face of the second shielding sleeve are arranged in parallel in a spaced mode, so that a discharging gap is formed, the discharging gap can conduct discharging when a transient overvoltage appears, a breakdown electric arc can be led to the outside of the shell, and therefore the voltage measurement device in the shell can be prevented from being damaged by the electric arc.
Description
Technical field
The present invention relates to high tension loop contact resistance live line measurement device, especially a kind of terminal voltage for measuring contact resistance is to calculate the resistance of contact resistance.
Background technology
People wish that electrical equipment contact is zero in contact site to the inhibition of circuit usually, and namely contact resistance is zero.But great many of experiments shows, the resistance at relay contacts position exists more or less, cannot ignore the impact of circuit.Therefore, the contact resistance of research electrical equipment, becomes extremely important to reduce to the impact of circuit.
Contact resistance is the resistance that two contact elements produce in contact site, whether the reliable operation of contact element, normal water conservancy diversion loop is generally several to tens microhms, there are even several thousand microhms up to a hundred, it is just that whether the resistivity of its contact site, pressure, free area are stablized in essence, contact resistance is the potential difference (PD) on surface in contact both sides and the ratio by the electric current of surface in contact, meets Ohm law, i.e. R
x=U/I, the metering system of current contact resistance all carries out under right and wrong online (off-line), provides a direct supply, and records U and I by reometer and voltage table, then calculate contact resistance R by measurement mechanism to contact resistance two ends
x.Due to the potential difference (PD) of the contact resistance under live line measurement forceful electric power in electric system, need to consider that interference under highfield and high-intensity magnetic field and measurement mechanism are to itself the problem such as security of system and measurement mechanism, therefore prior art does not have the method and apparatus of live line measurement contact resistance potential difference (PD).
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide a kind of can the measurement mechanism of live line measurement contact resistance potential difference (PD).
Object of the present invention realizes by following technical solution:
High tension loop contact resistance live line measurement device, for the voltage of live line measurement high tension loop contact resistance to calculate resistance, it is characterized in that: comprise closed insulation shell, be arranged at the voltage measuring apparatus in housing, be set in first on housing, secondary shielding cover, described voltage measuring apparatus is provided with and extends to first of outside, second p-wire, outside housing first, second p-wire correspondence is enclosed with the 3rd, 4th bell housing, described first, secondary shielding cover is corresponding to the 3rd, 4th bell housing conduction connects, described first, secondary shielding cover interval arranges and intercepts gap to be formed, described first bell housing is arranged with the metal discharge collar striding across and intercept gap, the leading portion of the metal discharge collar and described secondary shielding overlap outer peripheral face parallel interval and arrange to form discharging gap.
Further, the present invention also comprises the first wireless communication module that setting is connected with voltage measuring apparatus in the housing, the terminal device being provided with the second wireless communication module, and described voltage measuring apparatus realizes data by first, second wireless communication module and terminal device and transmits.
Further, described housing is provided with insulating bar, described secondary shielding puts the resigning hole offering and pass for insulating bar, and described first wireless communication module outwards transmits data by resigning hole.
Further, the described metal discharge collar forms in the hold-fast ring section of the first bell housing outer peripheral face, the electric discharge ring section of horizontal-extending and the abutment ring section be connected between hold-fast ring section and electric discharge ring section by holding tightly.
Further, the front end edge of described electric discharge ring section stretches out.
Further, the described metal discharge collar is open type ring body, and its opening part is connected by adjusting bolt, nut, and by regulating the diameter of the adjustable described metal discharge collar of size of opening, described hold-fast ring section is locked by clamping screw and the first bell housing.
Further, described discharging gap equals the obstruct gap of 1/5-3/5.
Further, first, second wireless communication module described is bluetooth communication or WiFi communication module.
Further, in first, second bell housing described, at least one party is movably set on housing to regulate the size of described discharging gap.
Further, first, second bell housing described forms by around the collar of housing outer peripheral face and the shrouding of closed collar end face.
The present invention has following beneficial effect:
Voltage measuring apparatus is arranged in the housing, and at outside first, second bell housing sheathed, first, second p-wire outer peripheral face is enclosed with the 3rd, the 4th bell housing, bell housing maskable Electric and magnetic fields, prevent voltage measuring apparatus to be subject to the interference of Electric and magnetic fields, ensure the measuring accuracy of voltage measuring apparatus; Form discharging gap between the metal discharge collar and secondary shielding overlap, discharging gap can discharge when there is transient overvoltage, is guided into by fault electric arc outside housing, prevents the voltage measuring apparatus in electric arc damage housing; The leading portion of the metal discharge collar and secondary shielding overlap outer peripheral face and be arranged in parallel, the electric fields uniform of discharging gap can be made, ensure that discharging gap has good electric discharge repeatability, the metal discharge collar is open type ring body, by regulating the diameter of the adjustable described metal discharge collar of size of opening, thus the size of discharging gap is regulated to make it to adapt to different conditions of work; Housing arranges insulating bar, operating personnel can be convenient to and carry out high-order live line measurement, and ensure processing safety; Voltage measuring apparatus realizes radio communication by wireless communication module and terminal device, by data transfer to terminal device, thus can observe easily and record measurement result.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is structural representation of the present invention.
Fig. 2 is functional block diagram of the present invention.
Fig. 3 is cut-open view of the present invention.
Fig. 4 is the mounting structure figure of the metal discharge collar of adjustable diameter.
Embodiment
With reference to shown in Fig. 1, Fig. 2 and Fig. 3, high tension loop contact resistance live line measurement device, comprise insulation shell 1, voltage measuring apparatus 3, first bell housing 21, secondary shielding cover the 22, the 3rd bell housing 51, the 4th bell housing 52, first bluetooth communication 4 and mobile phone 6, wherein, the first bell housing 21, secondary shielding cover the 22, the 3rd bell housing 51, the 4th bell housing 52 are the metal material such as copper, aluminium.
Housing 1 is cylindrical, insulating bar 11 is provided with below it, this insulating bar 11 can be the rhabodoid of scalable adjustment, housing 1 can be risen to a high position by insulating bar 11, to measure the potential difference (PD) being positioned at high-order contact resistance R, first, secondary shielding cover 21, 22 outsides being set in housing 1, first bell housing 21 forms by around the collar 211 of housing 1 outer peripheral face and the shrouding 212 of closed collar 211 end face, secondary shielding cover 22 forms by around the collar 222 of housing 1 outer peripheral face and the shrouding 223 of closed collar 222 end face, secondary shielding cover 22 offers the resigning hole 221 passed for insulating bar 11, it is inner that voltage measuring apparatus 3 is arranged on housing 1, be provided with and extend to first of housing 1 outside, second p-wire 31, 32, for measuring the potential difference (PD) at contact resistance R two ends, housing 1 and shrouding 212, 223 are formed for first, second p-wire 31, 32 resigning holes passed, 4th bell housing 52 wraps up the second p-wire 32 of housing 1 outside, 3rd bell housing 51 wraps up the first p-wire 31 of outside, wherein, first, secondary shielding cover 21, 22 by wire 331, 332 is corresponding to the 3rd, 4th bell housing 51, 52 conductions connect, first, secondary shielding cover 21, 22 intervals arrange and intercept clearance D to be formed, first bell housing 21 is arranged with the metal discharge collar 7 striding across and intercept clearance D, the leading portion of the metal discharge collar 7 and secondary shielding overlap 22 outer peripheral face parallel interval and arrange to form discharging gap L, first, secondary shielding cover 21, 22 relative annular edge along between obstruct clearance D equal everywhere, the metal discharge collar 7 is by the hold-fast ring section 71 of holding tightly at the first bell housing 21 outer peripheral face, electric discharge ring section 72 and the abutment ring section 77 be connected between hold-fast ring section 71 and electric discharge ring section 72 of horizontal-extending form, the front end edge 73 of electric discharge ring section 72 stretches out.
With reference to shown in Fig. 4, for the metal discharge collar 7 of adjustable diameter, the metal discharge collar 7 is open type ring body, its opening part is connected by adjusting bolt 75, nut 76, the diameter of the adjustable metal discharge collar 7 of the size of opening is regulated by pine/tight adjusting bolt 75, thus regulating the size of discharging gap L, hold-fast ring section 71 is locked by clamping screw 74 and the first bell housing 21.
First bluetooth communication 4 arranges within the case 1 and is connected with voltage measuring apparatus 3, the emitting antenna 41 of the first bluetooth communication 4 is arranged near resigning hole 221, externally measurement data is sent by resigning hole 221, mobile phone 6 is built-in with the second bluetooth communication 61, voltage measuring apparatus 3 realizes data by first, second bluetooth communication 4,61 and mobile phone 6 and transmits, and mobile phone 6 receives data and display measurement result.
Concrete metering system is: by insulating bar 11, housing 1 is risen to a high position, two p-wires 31,32 of voltage measuring apparatus 3 are conducted electricity with the two ends wire of contact resistance R be connected, measurement result is sent to mobile phone 6 by first, second bluetooth communication 4,61 by voltage measuring apparatus 3, mobile phone 6 receives and display measurement result, when causing transient overvoltage when there is thunderbolt, discharging gap L discharges, fault electric arc is guided into outside housing 1, prevent the voltage measuring apparatus 3 in electric arc damage housing 1.
The above, be only preferred embodiment of the present invention, therefore can not limit scope of the invention process with this, and the equivalence namely done according to the present patent application the scope of the claims and description changes and modifies, and all should still remain within the scope of the patent.
Claims (10)
1. high tension loop contact resistance live line measurement device, for the voltage of live line measurement high tension loop contact resistance to calculate resistance, it is characterized in that: comprise closed insulation shell, be arranged at the voltage measuring apparatus in housing, be set in first on housing, secondary shielding cover, described voltage measuring apparatus is provided with and extends to first of outside, second p-wire, outside housing first, second p-wire correspondence is enclosed with the 3rd, 4th bell housing, described first, secondary shielding cover is corresponding to the 3rd, 4th bell housing conduction connects, described first, secondary shielding cover interval arranges and intercepts gap to be formed, described first bell housing is arranged with the metal discharge collar striding across and intercept gap, the leading portion of the metal discharge collar and described secondary shielding overlap outer peripheral face parallel interval and arrange to form discharging gap.
2. high tension loop contact resistance live line measurement device according to claim 1, it is characterized in that: also comprise the first wireless communication module that setting is connected with voltage measuring apparatus in the housing, the terminal device being provided with the second wireless communication module, described voltage measuring apparatus realizes data by first, second wireless communication module and terminal device and transmits.
3. high tension loop contact resistance live line measurement device according to claim 2, it is characterized in that: described housing is provided with insulating bar, described secondary shielding puts the resigning hole offering and pass for insulating bar, and described first wireless communication module outwards transmits data by resigning hole.
4. the high tension loop contact resistance live line measurement device according to claim 1 or 2 or 3, is characterized in that: the described metal discharge collar forms in the hold-fast ring section of the first bell housing outer peripheral face, the electric discharge ring section of horizontal-extending and the abutment ring section be connected between hold-fast ring section and electric discharge ring section by holding tightly.
5. high tension loop contact resistance live line measurement device according to claim 4, is characterized in that: the front end edge of described electric discharge ring section stretches out.
6. high tension loop contact resistance live line measurement device according to claim 4, it is characterized in that: the described metal discharge collar is open type ring body, its opening part is connected by adjusting bolt, nut, by regulating the diameter of the adjustable described metal discharge collar of size of opening, described hold-fast ring section is locked by clamping screw and the first bell housing.
7. the high tension loop contact resistance live line measurement device according to claim 1 or 2 or 3, is characterized in that: described discharging gap equals the obstruct gap of 1/5-3/5.
8. the high tension loop contact resistance live line measurement device according to claim 1 or 2 or 3, is characterized in that: first, second wireless communication module described is bluetooth communication or WiFi communication module.
9. the high tension loop contact resistance live line measurement device according to claim 1 or 2 or 3, is characterized in that: in first, second bell housing described, at least one party is movably set on housing to regulate the size of described discharging gap.
10. the high tension loop contact resistance live line measurement device according to claim 1 or 2 or 3, is characterized in that: first, second bell housing described forms by around the collar of housing outer peripheral face and the shrouding of closed collar end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648584.3A CN104360162A (en) | 2014-11-14 | 2014-11-14 | Live line measurement device for contact resistance of high voltage loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648584.3A CN104360162A (en) | 2014-11-14 | 2014-11-14 | Live line measurement device for contact resistance of high voltage loop |
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| CN104360162A true CN104360162A (en) | 2015-02-18 |
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|---|---|---|---|
| CN201410648584.3A Pending CN104360162A (en) | 2014-11-14 | 2014-11-14 | Live line measurement device for contact resistance of high voltage loop |
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Application publication date: 20150218 |