CN210742376U - Sleeve tap current and voltage monitoring device - Google Patents
Sleeve tap current and voltage monitoring device Download PDFInfo
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- CN210742376U CN210742376U CN201921641861.2U CN201921641861U CN210742376U CN 210742376 U CN210742376 U CN 210742376U CN 201921641861 U CN201921641861 U CN 201921641861U CN 210742376 U CN210742376 U CN 210742376U
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- 238000012544 monitoring process Methods 0.000 description 11
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
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- 238000012938 design process Methods 0.000 description 1
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- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 230000035882 stress Effects 0.000 description 1
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Abstract
The utility model provides a sleeve pipe end screen electric current and voltage monitoring device, the device includes: the device comprises a shielding case, a current sensor, a voltage detection device and an extension guide rod; the shielding cover is of an internal hollow structure, one end of the shielding cover is open, the other end of the shielding cover is closed, and the open end of the shielding cover is detachably connected with the end screen terminal base; the current sensor, the voltage detection device and the extension guide rod are all arranged in the shielding case, the first end of the extension guide rod is connected with the end screen grounding guide rod, the extension guide rod penetrates through the current sensor, and the second end of the extension guide rod is connected with the input end of the voltage detection device; the grounding end of the voltage detection device is connected with the shielding case; the leading-out wire of current sensor and voltage detection device's leading-out wire all wear to locate the shield cover and are connected with data acquisition device. The utility model discloses gather sleeve pipe end screen electric current and sleeve pipe voltage, guarantee the direct reliable ground connection of sleeve pipe end screen, the problem that ground resistance is big that avoids end screen ground connection disconnection and traditional sleeve pipe end screen ground lead to bring guarantees the leakproofness.
Description
Technical Field
The utility model relates to a sleeve pipe monitoring technology field particularly, relates to a sleeve pipe end screen electric current and voltage monitoring device.
Background
The high-voltage capacitor type sleeve is composed of a conductive rod, a capacitor layer, an outer insulating sheath, a connecting flange, an external equalizing ring and the like, and a multilayer capacitor core body is formed by alternately rolling aluminum foil and insulating paper in an insulating part, so that radial and axial electric fields between the conductive rod and the connecting flange are uniformly distributed. When the bushing operates in a live mode, the bushing end screen (the outermost aluminum foil plate of the capacitor core) is required to be connected with the ground in an equipotential mode. Referring to fig. 1, the end screen protective cover 1' is connected with an end screen terminal base 3', the end screen grounding guide rod 2' is partially arranged in the end screen protective cover 1', and the sleeve end screen lead is connected with the end screen protective cover 1' and then grounded. However, the bushing needs to bear high voltage, large current, mechanical stress and other various environmental stresses during operation, and the defects of the bushing during the design and manufacturing process will be amplified continuously during operation, which easily causes the performance of the bushing to be reduced and even the bushing to be out of order. Therefore, online monitoring of the running state of the casing is an effective means for realizing casing fault early warning and taking countermeasures in advance.
Generally, the monitoring of the bushing is mainly realized by measuring voltage borne by the bushing and bushing end screen leakage current waveform data, calculating a main capacitance and a dielectric loss factor of the bushing through a certain algorithm, and judging the insulation state of the bushing according to changes of the capacitance and the dielectric loss factor. Therefore, the collection of the bushing end screen current and the operation voltage signals is the basis for carrying out the insulation state monitoring of the bushing. Typically, the bushing operating voltage is measured by a voltage transformer connected directly to the high-voltage end of the bushing, and the bushing end screen leakage current must be taken from the bushing end screen measurement terminal.
Referring to fig. 2, the end screen grounding guide rod 2 'is connected with the extension guide rod 4', the extension guide rod 4 'penetrates through the end screen protective cover 1' and then is connected with the end screen outgoing line 5', the end screen outgoing line 5' penetrates through the current sensor 6 'and then is grounded, and the sleeve end screen leakage current signal is obtained through the current sensor 6'. Although the current sensor 6' can measure the leakage current of the end screen of the sleeve, the direct and reliable grounding mode of the end screen of the original sleeve is changed, and the risk of grounding disconnection of the end screen is increased. Meanwhile, the length of the end screen outgoing line 5' is long, the impedance of the sleeve end screen grounding is increased, and the risk of sleeve end screen damage caused by potential lifting at the sleeve end screen is increased during overvoltage.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a sleeve pipe end screen current and voltage monitoring devices aims at solving the end screen lead-out wire among the prior art and wears to establish and easily leads to end screen ground connection disconnection and fragile problem behind the outside current sensor of end screen protection casing in earthing again.
The utility model provides a sleeve pipe end screen electric current and voltage monitoring device, the device includes: the device comprises a shielding case, a current sensor, a voltage detection device and an extension guide rod; the shielding cover is of an internal hollow structure, one end of the shielding cover is open, the other end of the shielding cover is closed, and the open end of the shielding cover is detachably connected with the end screen terminal base; the current sensor, the voltage detection device and the extension guide rod are all arranged in the shielding case, the first end of the extension guide rod is used for being connected with the end screen grounding guide rod, the extension guide rod penetrates through the current sensor, and the second end of the extension guide rod is connected with the input end of the voltage detection device; the grounding end of the voltage detection device is connected with the shielding case; the leading-out wire of current sensor and voltage detection device's leading-out wire all wear to locate the shield cover and are used for being connected with data acquisition device.
Further, the bushing end screen current and voltage monitoring device further comprises: a first insulating sleeve; wherein, the first insulating bush is arranged outside the extension guide rod in a sleeved mode.
Furthermore, in the bushing end screen current and voltage monitoring device, a grounding terminal is arranged at a grounding end of the voltage detection device, and the grounding terminal is connected with the shielding case.
Further, the bushing end screen current and voltage monitoring device further comprises: an aviation plug; wherein, the shield cover has been seted up the through hole, and the aviation plug sets up in the through hole, and current sensor's lead-out wire and voltage detection device's lead-out wire all are connected with data acquisition device through the aviation plug.
Further, the bushing end screen current and voltage monitoring device further comprises: a connecting mechanism; the connecting mechanism is arranged in the shielding cover and arranged between the end screen grounding guide rod and the extension guide rod, and is used for enabling the end screen grounding guide rod and the extension guide rod to be in stable contact and transmitting current.
Further, in the above bushing end screen current and voltage monitoring apparatus, the connection mechanism includes: the conductive spring and the two conductive pressing plates are both arranged in the shielding case; the two ends of the conductive spring are respectively connected with the two conductive pressing plates in a one-to-one correspondence mode, one conductive pressing plate is connected with the end screen grounding guide rod, and the other conductive pressing plate is connected with the extension guide rod.
Further, the bushing end screen current and voltage monitoring device further comprises: a second insulating sleeve; the second insulating sleeve is arranged in the shielding cover; the connecting mechanism is arranged in the second insulating sleeve.
Further, the bushing end screen current and voltage monitoring device further comprises: an annular stopper; the limiting part is arranged in the shielding cover and close to the opening end of the shielding cover, and is used for limiting the connecting mechanism.
Further, in the bushing end screen current and voltage monitoring device, the shielding case includes: the end cover comprises an end cover, a cylindrical cover body and an annular positioning piece arranged in the cover body; the first end of the cover body is detachably connected with the end screen terminal base, and the second end of the cover body is detachably connected with the end cover; the first end of the positioning piece is connected with the end cover, and the second end of the positioning piece extends to the end screen terminal base and is in contact with the current sensor so as to limit the current sensor; the voltage detection device is arranged inside the positioning piece.
Further, in the above-mentioned bushing end screen current and voltage monitoring device, the shield cover further includes: a partition plate; the partition plate is arranged in the cover body to divide the inner space of the cover body into two chambers; the connecting mechanism is arranged in a cavity close to the first end of the cover body, and the current sensor and the voltage detection device are both arranged in the other cavity; the division board is provided with an opening, the extension guide rod penetrates through the opening, the first end of the extension guide rod extends into the cavity close to the first end of the cover body, and the second end of the extension guide rod extends into the other cavity.
The utility model discloses in, current sensor and voltage detection device all set up in the shield cover, the current signal that current sensor detection sleeve pipe end screen was revealed, the voltage of voltage detection device detection sleeve pipe end screen, can realize the collection to sleeve pipe end screen current and sleeve pipe voltage, be convenient for monitor sheathed tube insulating state, and, can guarantee effectively that the sleeve pipe end screen is direct, reliably ground connection, avoid end screen ground connection disconnection, current sensor's lead-out wire is directly connected with data acquisition device with voltage detection device's lead-out wire, can reduce the length of lead-out wire effectively, the longer problem that brings of ground impedance increase of traditional sleeve pipe end screen ground connection lead wire has been avoided, and then the damage of end screen has been avoided, and simultaneously, can guarantee the sealing performance of sleeve pipe end screen, avoid sleeve pipe end screen to wet, it easily leads to easily to lead to end screen ground connection disconnection and bad to solve end screen lead-out wire among the prior art to wear to establish behind the current sensor of arranging the outside To give a title.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of a conventional bushing end screen grounding device;
FIG. 2 is a schematic structural diagram of a conventional bushing tap current measuring device;
fig. 3 is a schematic structural diagram of a bushing end screen current and voltage monitoring device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a bushing tap current and voltage monitoring device according to an embodiment of the present invention;
fig. 5 is an electrical schematic diagram of a voltage detection device in the bushing end screen current and voltage monitoring device provided by the embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a bushing end screen current and voltage monitoring device according to an embodiment of the present invention. As shown, the bushing tap current and voltage monitoring device includes: the device comprises a shielding case 1, a current sensor 2, a voltage detection device 3 and an extension guide rod 4. Wherein, shield cover 1 is cylindric and is inside hollow structure, and the one end of shield cover 1 is the open end other end and is the blind end. The open end (left end shown in fig. 3) of the shielding case 1 is used for being detachably connected with the end-screen terminal base 5, and specifically, the open end of the shielding case 1 and the end-screen terminal base 5 are in threaded connection or flange connection. Of course, other detachable connection manners may be adopted, and this embodiment does not limit this.
During specific implementation, a sealing ring can be arranged between the opening end of the shielding cover 1 and the end screen terminal base 5 so as to improve the sealing performance of the sleeve end screen and realize the rain-proof and moisture-proof performance of the sleeve end screen.
The current sensor 2, the voltage detection device 3 and the extension guide rod 4 are all arranged in the shielding case 1, a first end (the left end shown in fig. 3) of the extension guide rod 4 is used for being connected with the end screen grounding guide rod 6, the extension guide rod 4 penetrates through the current sensor 2, and a second end (the right end shown in fig. 3) of the extension guide rod 4 is connected with the input end of the voltage detection device 3. Specifically, the first end of the extension guide rod 4 is detachably connected to the end screen grounding guide rod 6, and more specifically, the first end of the extension guide rod 4 is in threaded connection with the end screen grounding guide rod 6. Current sensor 2 is for the punching formula and be the ring form, and extension guide arm 4 wears to locate current sensor 2's inside, and current sensor 2's outer wall can be connected with the inner wall of shield cover 1. The voltage detection device 3 is horizontally disposed in the shield case 1, and the voltage detection device 3 is disposed between the current sensor 2 and a closed end (right end shown in fig. 3) of the shield case 1.
The voltage detection device 3 may be connected to the inner wall of the shielding case 1, and preferably, the voltage detection device 3 is screwed to the shielding case 1.
The second end of the extension guide rod 4 is detachably connected with the input end of the voltage detection device 3, and preferably, the second end of the extension guide rod 4 is in threaded connection with the input end of the voltage detection device 3. During specific implementation, the input end of the voltage detection device 3 can be a nut arranged at the center of the voltage detection device 3, the second end of the extension guide rod 4 is in threaded connection with the nut, and the nut thread sleeve is longer and can play a role in fixing and electrically connecting.
In a specific implementation, referring to fig. 5, the voltage detection device 3 may include: voltage dividing capacitor, discharge resistor R1And a varistor R2. The voltage-dividing capacitor is composed ofTL，C1，C2，C3Formed in parallel, a voltage-dividing capacitor and a main capacitor C of the sleeveTHThe two ends of the voltage-dividing capacitor are connected in series to form a capacitive voltage divider, and the running voltage of the sleeve can be monitored by measuring the voltage at the two ends of the voltage-dividing capacitor and the calibrated voltage-dividing ratio. Discharge resistor R1Providing a discharge circuit for the capacitor, the varistor R2The method is used for sleeve tap open circuit protection. In fig. 5, CT is a current sensor.
In practical implementation, the circuit elements constituting the voltage detection device 3 may be integrated on a circuit board. Since the resistor and the capacitor are both in parallel connection, the input terminals of all the elements can be connected in parallel to serve as the input terminal of the whole voltage detection device 3. The other ends of all the elements are grounded after being connected in parallel, and a grounding end is arranged on the voltage detection device 3.
The ground terminal of the voltage detection device 3 is connected to the shield case 1, and specifically, the ground terminal of the voltage detection device 3 is provided with a ground terminal 9, and the ground terminal 9 is connected to the shield case 1.
In specific implementation, the whole shielding case 1 is grounded, and the connection mode of the whole shielding case 1 is grounded by referring to the grounding mode in the prior art, which is not described herein again. In specific implementation, the outer part of the end screen grounding guide rod 6 is sleeved with an end screen insulating sleeve 7.
The outgoing line of the current sensor 2 and the outgoing line of the voltage detection device 3 are both arranged through the shielding case 1, and the outgoing line of the current sensor 2 and the outgoing line of the voltage detection device 3 are both used for being connected with the data acquisition device 11. Specifically, the shielding case 1 is provided with a through hole, and the outgoing line of the current sensor 2 and the outgoing line of the voltage detection device 3 are connected with the data acquisition device 11 after passing through the through hole. More specifically, the through hole is opened in the closed end of the shield case 1.
When the bushing end screen current detection device operates, the bushing end screen current passes through the current sensor 2 and is input into the voltage detection device 3, and finally the bushing end screen current detection device is connected with the shielding cover 1 and is communicated with the ground, so that the integration of the bushing end screen current, the voltage detection and the end screen grounding is realized.
During specific implementation, the shielding case 1 is made of conductive metal, and the shielding case 1 performs electromagnetic shielding on the current sensor 2 and the voltage detection device 3, so that a good electromagnetic shielding effect is achieved, interference of an external electromagnetic field on bushing end screen leakage current and capacitance voltage division signals is reduced, and various components in the shielding case 1 can be protected.
It can be seen that, in this embodiment, the current sensor 2 and the voltage detection device 3 are both disposed in the shielding case 1, the current sensor 2 detects a current signal leaked by the end screen of the bushing, the voltage detection device 3 detects a voltage of the bushing, and can realize collection of a bushing end screen current and a bushing voltage, so as to facilitate monitoring of an insulation state of the bushing, and can effectively ensure direct and reliable grounding of the end screen of the bushing, thereby avoiding disconnection of the end screen grounding, the outgoing line of the current sensor 2 and the outgoing line of the voltage detection device 3 are directly connected with the data acquisition device 11, so as to effectively reduce the length of the outgoing line, thereby avoiding the problem of increased grounding impedance caused by a longer outgoing line of the end screen of the traditional bushing, further avoiding damage of the end screen, and simultaneously ensuring the sealing performance of the end screen of the bushing, avoiding the end screen from being affected with moisture, and solving the problem that the end screen is easily damaged by the end screen due to the fact that the outgoing The grounding is broken and is easy to damage.
In the above embodiment, the bushing tap current and voltage monitoring apparatus may further include: a first insulating sleeve 8. The first insulating sleeve 8 is sleeved outside the extension guide rod 4, and the extension guide rod 4 and the first insulating sleeve 8 penetrate through the current sensor 2 together. The arrangement of the first insulating sleeve 8 can effectively ensure the insulating state between the current sensor 2 and the extension guide rod 4, and the insulating strength is improved.
Referring to fig. 3, in the foregoing embodiments, the bushing end screen current and voltage monitoring apparatus may further include: an aircraft plug 10. Wherein, the shield cover 1 has been seted up the through hole, and the aviation plug 10 sets up in the through hole, and the lead-out wire of current sensor 2 and the lead-out wire of voltage detection device 3 all are connected with data acquisition device 11 through aviation plug 10. Specifically, the aviation plug 10 is disposed in the through hole and connected with the shield case 1. The aviation plug 10 can effectively ensure the sealing reliability of the sleeve end screen, prevent the sleeve end screen from being affected with damp, and safely and reliably transmit the current signal output by the current sensor 2 and the voltage signal output by the voltage detection device 3, so that the collection of the sleeve end screen current and the sleeve voltage is realized.
Referring to fig. 4, in the foregoing embodiments, the bushing end screen current and voltage monitoring apparatus may further include: a connecting mechanism 12. Wherein, the connecting mechanism 12 is arranged in the shielding case 1, the connecting mechanism 12 is arranged between the end screen grounding guide rod 6 and the extension guide rod 4, one end of the connecting mechanism 12 is connected with the end screen grounding guide rod 6, and the other end of the connecting mechanism 12 is connected with the extension guide rod 4. The connecting mechanism 12 is used for stably contacting the end screen grounding guide rod 6 and the extension guide rod 4 and transmitting current, namely transmitting the current of the end screen grounding guide rod 6 to the extension guide rod 4. The arrangement of the connecting mechanism can effectively ensure the stable contact between the end screen grounding guide rod 6 and the extension guide rod 4, thereby ensuring the stable transmission of current and further ensuring the accuracy of detected current and voltage data.
With continued reference to fig. 4, in the above-described embodiment, the connection mechanism 12 may include: a conductive spring 121 and two conductive pressure plates 122. The conductive spring 121 and the two conductive pressing plates 122 are both disposed in the shielding case 1, two ends of the conductive spring 121 are respectively connected to the two conductive pressing plates 122 in a one-to-one correspondence manner, that is, one end of the conductive spring 121 is connected to one of the conductive pressing plates 122, and the other end of the conductive spring 121 is connected to the other conductive pressing plate 122. And one of the conductive pressing plates 122 is connected with the end screen grounding guide rod 6, and the other conductive pressing plate 122 is connected with the extension guide rod 4, specifically, both the conductive pressing plates 122 are horizontally arranged in the shielding case 1, that is, both the conductive pressing plates 122 are vertically arranged in the shielding case 1, and more specifically, both the conductive pressing plates 122 are vertical to the length direction of the shielding case 1. The length direction of the conductive spring 121 is parallel to the length direction of the shield case 1.
Preferably, one of the conductive pressing plates 122 is detachably connected with the end screen grounding guide rod 6, and the other conductive pressing plate 122 is also detachably connected with the extension guide rod 4. More preferably, one of the conductive pressing plates 122 is in threaded connection with the end screen grounding guide rod 6, that is, the conductive pressing plate 122 is provided with a threaded hole, the end screen grounding guide rod 6 is provided with a thread, and the end screen grounding guide rod 6 is screwed in the threaded hole of the conductive pressing plate 122. The other conductive pressing plate 122 is also in threaded connection with the extension guide rod 4, that is, the conductive pressing plate 122 is provided with a threaded hole, the extension guide rod 4 is provided with a thread, and the extension guide rod 4 is in threaded connection with the threaded hole of the conductive pressing plate 122.
It can be seen that, in this embodiment, the two conductive pressing plates 122 are pressed by the conductive spring 121 through its elastic force, so that the two conductive pressing plates 122 are in close contact with the end screen grounding guide rod 6 and the extension guide rod 4, and stable connection between the end screen grounding guide rod 6 and the extension guide rod 4 can be effectively ensured, thereby ensuring stable current transmission.
With continued reference to fig. 4, in the above embodiment, the bushing tap current and voltage monitoring apparatus may further include: a second insulating sleeve 13. Wherein, the second insulating sleeve 13 is arranged in the shielding case 1, and the connecting mechanism 12 is arranged in the second insulating sleeve 13. Specifically, the second insulating sleeve 13 is annular, the outer wall of the second insulating sleeve 13 is connected to the inner wall of the shielding case 1, and the connecting mechanism 12 is disposed inside the second insulating sleeve 13, that is, the conductive spring 121 and the two conductive pressing plates 122 are disposed inside the second insulating sleeve 13. Thus, the insulating performance between the connecting mechanism 12 and the shield case 1 can be effectively ensured, and the insulating strength can be improved.
With continued reference to fig. 4, in the foregoing embodiments, the bushing end screen current and voltage monitoring apparatus may further include: a stopper 14. The limiting member 14 is annular, the limiting member 14 is disposed in the shielding case 1, the limiting member 14 is disposed near an opening end of the shielding case 1, and the limiting member 14 is used for limiting the connecting mechanism 12. Specifically, the limiting member 14 is made of an insulating material, and the limiting member 14 is disposed at an end of the second insulating sleeve 13 and is disposed at the conductive pressing plate 122 close to the end screen grounding guide rod 6 to limit the conductive pressing plate 122, so as to prevent the conductive pressing plate 122 from being ejected by the conductive spring 121. In one embodiment, the limiting member 14 may be a rubber ring.
With continued reference to fig. 4, in the above embodiments, the shielding can 1 may include: an end cap 111, a cover 110 and a retainer 112. The cover 110 is cylindrical, and both ends of the cover 110 are open ends. A first end (left end shown in fig. 4) of the cover 110 is detachably connected to the end-screen terminal base 5, and a second end (right end shown in fig. 4) of the cover 110 is detachably connected to the end cap 111. Specifically, a first end of the cover 110 is in threaded connection with the end-screen terminal base 5, and a second end of the cover 110 is connected with the end cap 111 through a fastening screw.
In specific implementation, sealing rings are arranged between the first end of the cover body 110 and the end screen terminal base 5 and between the second end of the cover body 110 and the end cover 111, so as to ensure the overall sealing of the end screen of the bushing.
The positioning element 112 is annular, and the positioning element 112 is disposed in the housing 110. A first end (a right end shown in fig. 4) of the positioning member 112 is connected to the end cap 111, a second end (a left end shown in fig. 4) of the positioning member 112 extends toward the end-screen terminal base 5, the second end of the positioning member 112 contacts the current sensor 2, and the positioning member 112 is used for limiting the current sensor 2. The voltage detection device 3 is disposed inside the positioning member 112, i.e., the voltage detection device 3 is vertically disposed inside the positioning member 112.
In specific implementation, the voltage detection device 3 may be connected to the inner wall of the positioning member 112 through a screw. Alternatively, the voltage detection device 3 may be disposed only inside the positioning member 112 without being connected to the positioning member 112, but the voltage detection device 3 may be connected to the end cap 111 by screws. Specifically, the ground terminal 9 of the voltage detection device 3 may be provided with a thread, the end cover 111 is provided with a screw hole, and the ground terminal 9 is screwed with the end cover 111. In the present embodiment, two or more ground terminals 9 may be provided, as long as stable connection between the voltage detection device 3 and the end cap 111 can be ensured, and the number of the ground terminals 9 is not limited in this embodiment.
Preferably, the positioning member 112 and the end cap 111 are integrally formed, so as to facilitate processing and manufacturing.
It can be seen that, in this embodiment, the cover body 110 is detachably connected to the end cover 111, so that each component in the shielding case 1 can be conveniently replaced and detached, the positioning member 112 is arranged to effectively ensure the position of the current sensor 2, and prevent the current sensor 2 from moving, thereby ensuring the current detection of the current sensor 2.
With continued reference to fig. 4, in the above embodiment, the shielding can 1 may further include: a partition plate 113. The partition 113 is transversely disposed in the cover 110, that is, the partition 113 is perpendicular to the length direction of the cover 110. The partition plate 113 is used to partition the internal space of the housing 110 into two chambers, the two chambers are arranged along the length direction of the housing 110, one chamber of the two chambers is close to the first end of the housing 110, and the other chamber is close to the end cap 111.
The connection mechanism 12 is disposed in a chamber near the first end of the housing 110, and the current sensor 2 and the voltage detection device 3 are both disposed in another chamber near the end cap 111.
The partition plate 113 is provided with an opening through which the extension guide rod 4 is inserted. A first end of the extension rod 4 extends into the chamber near the first end of the cover 110 and is connected to one of the conductive pressing plates 122, and a second end of the extension rod 4 extends into the other chamber near the end cap 111 and is connected to the input end of the voltage detection device 3.
Preferably, the partition plate 113 and the cover body 110 are integrally formed, so as to facilitate processing and manufacturing.
It can be seen that in this embodiment, the partition plate 113 divides the internal space of the cover body 110 into two chambers, and separates the connection mechanism 12 from the current sensor 2 and the voltage detection device 3, thereby effectively ensuring the insulating performance of each component in the shielding case 1.
In conclusion, in this embodiment, the current sensor 2 and the voltage detection device 3 are both arranged in the shielding case 1, so that the collection of the bushing end screen current and the bushing voltage can be realized, the insulating state of the bushing is convenient to monitor, and the bushing end screen can be effectively ensured to be directly and reliably grounded, thereby avoiding the disconnection of the end screen ground, the outgoing line of the current sensor 2 and the outgoing line of the voltage detection device 3 are directly connected with the data acquisition device 11, so that the length of the outgoing line can be effectively reduced, the problem of the increase of the ground impedance caused by the longer traditional bushing end screen ground lead is avoided, further avoiding the damage of the end screen, and meanwhile, the sealing performance of the bushing end screen can be ensured, and the bushing end screen is prevented from being affected with damp.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A bushing tap current and voltage monitoring device, comprising: the device comprises a shielding case (1), a current sensor (2), a voltage detection device (3) and an extension guide rod (4); wherein,
the shielding cover (1) is of an internal hollow structure, one end of the shielding cover (1) is open, the other end of the shielding cover is closed, and the open end of the shielding cover (1) is detachably connected with the end screen terminal base (5);
the current sensor (2), the voltage detection device (3) and the extension guide rod (4) are all arranged in the shielding case (1), the first end of the extension guide rod (4) is used for being connected with a tail screen grounding guide rod (6), the extension guide rod (4) penetrates through the current sensor (2), and the second end of the extension guide rod (4) is connected with the input end of the voltage detection device (3); the grounding end of the voltage detection device (3) is connected with the shielding case (1);
the outgoing line of the current sensor (2) and the outgoing line of the voltage detection device (3) penetrate through the shielding case (1) and are used for being connected with the data acquisition device (11).
2. The bushing tap current and voltage monitoring device of claim 1, further comprising: a first insulating sleeve (8); wherein,
the first insulating sleeve (8) is sleeved outside the extension guide rod (4).
3. Bushing tap current and voltage monitoring device according to claim 1, characterized in that the ground terminal of the voltage detection device (3) is provided with a ground terminal (9), the ground terminal (9) being connected to the shielding cage (1).
4. The bushing tap current and voltage monitoring device of claim 1, further comprising: an aircraft plug (10); wherein,
the shielding case (1) is provided with a through hole, the aviation plug (10) is arranged in the through hole, and the outgoing line of the current sensor (2) and the outgoing line of the voltage detection device (3) are connected with the data acquisition device (11) through the aviation plug (10).
5. The bushing tap current and voltage monitoring device of any one of claims 1 to 4, further comprising: a connecting mechanism (12); wherein,
the connecting mechanism (12) is arranged in the shielding case (1) and between the end screen grounding guide rod (6) and the extension guide rod (4) and is used for enabling the end screen grounding guide rod (6) and the extension guide rod (4) to be in stable contact and transmitting current.
6. Bushing tap current and voltage monitoring device according to claim 5, characterized in that said connection means (12) comprise: a conductive spring (121) and two conductive pressure plates (122) which are both arranged in the shielding case (1); wherein,
two ends of the conductive spring (121) are respectively connected with the two conductive pressing plates (122) in a one-to-one correspondence mode, one of the conductive pressing plates is connected with the end screen grounding guide rod (6), and the other conductive pressing plate is connected with the extension guide rod (4).
7. The bushing tap current and voltage monitoring device of claim 5, further comprising: a second insulating sleeve (13); wherein,
the second insulating sleeve (13) is arranged in the shielding case (1);
the connecting mechanism (12) is arranged in the second insulating sleeve (13).
8. The bushing tap current and voltage monitoring device of claim 5, further comprising: an annular stopper (14); wherein,
the limiting part (14) is arranged in the shielding cover (1) and close to the opening end of the shielding cover (1) and used for limiting the connecting mechanism (12).
9. Bushing tap current and voltage monitoring device according to claim 5, characterized in that the shielding cage (1) comprises: the device comprises an end cover (111), a cylindrical cover body (110) and an annular positioning piece (112) arranged in the cover body (110); wherein,
the first end of the cover body (110) is detachably connected with the end screen terminal base (5), and the second end of the cover body (110) is detachably connected with the end cover (111);
the first end of the positioning piece (112) is connected with the end cover (111), and the second end of the positioning piece (112) extends to the end screen terminal base (5) and is in contact with the current sensor (2) so as to limit the current sensor (2);
the voltage detection device (3) is arranged inside the positioning piece (112).
10. Bushing tap current and voltage monitoring device according to claim 9, characterized in that said shielding cage (1) further comprises: a partition plate (113); wherein,
the partition plate (113) is disposed in the housing (110) to divide an inner space of the housing (110) into two chambers;
the connecting mechanism (12) is arranged in a cavity close to the first end of the cover body (110), and the current sensor (2) and the voltage detection device (3) are both arranged in the other cavity;
the partition plate (113) is provided with a hole, the extension guide rod (4) penetrates through the hole, the first end of the extension guide rod (4) extends out to a position close to the cavity at the first end of the cover body (110), and the second end of the extension guide rod (4) extends out to another cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921641861.2U CN210742376U (en) | 2019-09-29 | 2019-09-29 | Sleeve tap current and voltage monitoring device |
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| CN201921641861.2U CN210742376U (en) | 2019-09-29 | 2019-09-29 | Sleeve tap current and voltage monitoring device |
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| CN210742376U true CN210742376U (en) | 2020-06-12 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112611901A (en) * | 2020-12-03 | 2021-04-06 | 国网浙江省电力有限公司电力科学研究院 | Shielding device for current transformer end screen current test |
| CN112731075A (en) * | 2020-12-17 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
| CN113030776A (en) * | 2021-03-31 | 2021-06-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Flexible direct-current wall bushing monitoring device, monitoring method and fault judgment method |
| CN113030199A (en) * | 2021-04-14 | 2021-06-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Epoxy glue impregnated paper sleeve simulated wetting test device and method |
| CN117970181A (en) * | 2024-03-27 | 2024-05-03 | 南方电网科学研究院有限责任公司 | Transformer bushing end screen ground fault detection device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112611901A (en) * | 2020-12-03 | 2021-04-06 | 国网浙江省电力有限公司电力科学研究院 | Shielding device for current transformer end screen current test |
| CN112731075A (en) * | 2020-12-17 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
| CN112731075B (en) * | 2020-12-17 | 2022-04-29 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
| CN113030776A (en) * | 2021-03-31 | 2021-06-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Flexible direct-current wall bushing monitoring device, monitoring method and fault judgment method |
| CN113030776B (en) * | 2021-03-31 | 2022-05-17 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Flexible direct-current wall bushing monitoring device, monitoring method and fault judgment method |
| CN113030199A (en) * | 2021-04-14 | 2021-06-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Epoxy glue impregnated paper sleeve simulated wetting test device and method |
| CN117970181A (en) * | 2024-03-27 | 2024-05-03 | 南方电网科学研究院有限责任公司 | Transformer bushing end screen ground fault detection device |
| CN117970181B (en) * | 2024-03-27 | 2024-05-28 | 南方电网科学研究院有限责任公司 | Transformer bushing end screen ground fault detection device |
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