CN211179979U - Generator stator slot potential measuring probe - Google Patents
Generator stator slot potential measuring probe Download PDFInfo
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- CN211179979U CN211179979U CN201921985083.9U CN201921985083U CN211179979U CN 211179979 U CN211179979 U CN 211179979U CN 201921985083 U CN201921985083 U CN 201921985083U CN 211179979 U CN211179979 U CN 211179979U
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- probe
- generator stator
- stator slot
- potential measuring
- voltage
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- 239000000523 sample Substances 0.000 title claims abstract description 79
- 238000005259 measurement Methods 0.000 claims abstract description 29
- 238000009421 internal insulation Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 11
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 8
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 5
- 229920002379 silicone rubber Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 11
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 4
- 238000009422 external insulation Methods 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000003373 anti-fouling effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
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- 239000004945 silicone rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to an electric power industry high-voltage testing technical field, concretely relates to generator stator slot current potential measuring probe. Including probe main part and probe handle, the one end and the probe handle of probe main part are connected, the probe main part includes conductive core, internal insulation layer, shielding layer and external insulation layer, the internal insulation layer parcel is outside conductive core, the shielding layer parcel is at the internal insulation layer, the external insulation layer parcel is outside the shielding layer, the inside voltage measurement module that is equipped with of probe handle is equipped with voltage display screen on the probe handle, and voltage measurement module's input and conductive core are connected, and voltage measurement module's output and voltage display screen are connected. The utility model discloses can effectively improve the efficiency of measurement and the precision to the groove potential, improve the security that the probe used simultaneously through double-deck insulation design.
Description
Technical Field
The utility model relates to an electric power industry high-voltage testing technical field, concretely relates to generator stator slot current potential measuring probe.
Background
In the maintenance of the water turbine generator set, the tank potential is an important detection item, the detection of the tank potential is mainly to measure the potential difference between a semiconductor insulating layer on the surface of a stator bar and the ground, and the magnitude of the potential difference directly reflects the insulating condition between the stator bar and an iron core. The traditional measuring probe consists of an iron wire, a lead, an insulating adhesive tape and a voltmeter, and has the following defects: 1. the safety performance is poor, the insulation of the whole probe is provided only by the insulating adhesive tape, and if the probe is damaged, the probe is easy to cause electric shock injury; 2. the measurement efficiency is low, and because the voltmeter needs to be moved frequently in the whole measurement process, the size and the weight of the voltmeter are large, much time is spent on moving the voltmeter, and manpower and time are wasted; 3. the antifouling capacity is poor, a lot of dirt is accumulated in a test slot, and the dirt can be stuck on a probe to influence test data during testing; 4. the anti-interference ability is poor, and traditional probe lacks electromagnetic shield, can produce induced electromotive force in alternating magnetic field, influences the accuracy of measuring.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model provides a generator stator groove current potential measuring probe, when it was used, can effectively improve efficiency of measurement and the precision to the groove current potential, improves the security that the probe used simultaneously through double-deck insulation design.
The utility model discloses the technical scheme who adopts does:
the utility model provides a generator stator groove current potential measuring probe, includes probe main part and probe handle, and the one end and the probe handle of probe main part are connected, the probe main part includes conductive core, internal insulation layer, shielding layer and outer insulating layer, the internal insulation layer parcel is outside conductive core, the shielding layer parcel is internal insulation layer, the outer insulating layer parcel is outside the shielding layer, the inside voltage measurement module that is equipped with of probe handle is equipped with voltage display screen on the probe handle, and voltage measurement module's input and conductive core are connected, and voltage measurement module's output and voltage display screen are connected.
Preferably, the front end of the conductive wire core is provided with an exposed arc-shaped detection section.
Preferably, the main body of the conductive wire core is made of stainless steel wires with the diameter of 4mm and the length of 700mm, and the arc-shaped detection section at the front end of the conductive wire core is in the shape of a quarter of an arc with the radius of 10 mm.
Preferably, the probe handle has a terminal connected to a ground line, and the ground line is electrically connected to a ground terminal of the voltage measuring module.
Preferably, the ground wire is 2.5mm2The soft wire is 10m in length.
Preferably, the inner insulating layer is made of polytetrafluoroethylene, the outer insulating layer is a PET (polyethylene terephthalate) heat-shrinkable tube, and the outer insulating layer is in seamless butt joint with the probe grip.
Preferably, in the above technical solution, the shielding layer is a copper mesh grid.
Preferably, the probe grip is made of silicone rubber.
Preferably, the voltage measuring module comprises a voltage measuring circuit and a display circuit which are connected with each other, the input end of the voltage measuring circuit is connected with the conductive wire core, and the output end of the display circuit is connected with the voltage display screen.
Preferably, the thicknesses of the inner insulating layer and the outer insulating layer are both 0.5 mm.
The utility model has the advantages that:
the utility model has the advantages that the inner insulation layer and the outer insulation layer of the probe main body form double-layer composite insulation, and the silicon rubber insulation of the probe handle fully ensures the personal safety of the testers; the probe handle is internally provided with the voltage measuring module to detect voltage, and the voltage display screen is arranged on the probe handle to display a detection result, so that the volume and the weight are greatly reduced, and the workload of testers is reduced compared with the traditional mechanical voltmeter; the anti-electromagnetic interference capability of the probe main body is enhanced through the copper mesh grid shielding layer, and the accuracy of data is improved; through the integral wrapping and seamless butt joint design of the PET heat-shrinkable tube, the anti-fouling capacity of the probe is improved, and the cleaning is more convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic circuit diagram of the voltage measuring module.
In the figure: 1. a conductive wire core; 2. an inner insulating layer; 3. a shielding layer; 4. an outer insulating layer; 5. a voltage display screen; 6. a probe grip; 7. and a ground line.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It should be understood that the terms first, second, etc. are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
It should be understood that in the description of the present invention, the terms "upper", "vertical", "inner", "outer", and the like, refer to the orientation or positional relationship that is conventionally used to place the product of the present invention, or that is conventionally understood by those skilled in the art, and are used merely to facilitate the description of the present invention and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered as limiting the present invention.
It will be understood that when an element is referred to as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly adjacent" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …", "adjacent" versus "directly adjacent", etc.).
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.
It should also be noted that, in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently, or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
In the following description, specific details are provided to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.
Example 1:
the embodiment provides a generator stator slot potential measuring probe, as shown in fig. 1:
including probe main part and probe handle 6, the one end and the probe handle 6 of probe main part are connected, the probe main part includes conductive core 1, internal insulation layer 2, shielding layer 3 and outer insulation layer 4, 2 parcels of internal insulation layer are outside conductive core 1, 3 parcels of shielding layer are internal insulation layer 2, 4 parcels of outer insulation layer are outside shielding layer 3, the inside voltage measurement module that is equipped with of probe handle 6 is equipped with voltage display screen 5 on probe handle 6, and voltage measurement module's input is connected with conductive core 1, and voltage measurement module's output and voltage display screen 5 are connected. The tail end of the probe handle 6 is connected with a grounding wire 7, and the grounding wire 7 is connected and conducted with the grounding end of the voltage measurement module. The grounding wire 7 is 2.5mm2Soft catheterWire, length 10 m. The inner insulating layer 2 is made of polytetrafluoroethylene, the outer insulating layer 4 is a PET (polyethylene terephthalate) heat-shrinkable tube, and the outer insulating layer 4 is in seamless butt joint with the probe grip 6. The shielding layer 3 is a copper woven mesh. The probe grip 6 is made of silicon rubber.
When the probe is applied, the inner insulating layer 2 and the outer insulating layer 4 of the probe main body form double-layer composite insulation, and the silicon rubber insulation of the probe handle 6 fully ensures the personal safety of testers; the probe handle 6 is internally provided with the voltage measuring module for detecting voltage, and the voltage display screen 5 is arranged on the probe handle 6 for displaying a detection result, so that the size and the weight are greatly reduced, and the workload of a tester is reduced compared with a traditional mechanical voltmeter; the anti-electromagnetic interference capability of the probe main body is enhanced through the copper mesh grid shielding layer 3, and the accuracy of data is improved; through the integral wrapping and seamless butt joint design of the PET heat-shrinkable tube, the anti-fouling capacity of the probe is improved, and the cleaning is more convenient.
Example 2:
as an optimization of the above embodiment, the front end of the conductive wire core 1 is provided with an exposed arc-shaped detection section. The main body of the conductive wire core 1 is made of stainless steel wires with the diameter of 4mm and the length of 700mm, and the arc detection section at the front end of the conductive wire core 1 is in a quarter arc with the radius of 10 mm. When the probe is applied, the conductive wire core 1 adopts a stainless steel wire with the diameter of 4mm and the length of 700mm, so that the whole probe is moderate in size, the holding and pinching test are more convenient, and the measurement error caused by corrosion can be avoided; in practical application, the arc-shaped detection section is more convenient to contact the semiconductor insulating layer of the stator bar in the slot to measure in a complex scene.
Example 3:
as an optimization of the above embodiment, the circuit structure of the voltage measurement module is as shown in fig. 2, an input end of an ACV terminal of the voltage measurement module is connected to the conductive wire core 1, and is used for introducing a voltage to be measured; a COM grounding terminal of the voltage measuring module is connected with a grounding wire 7; the voltage measurement module comprises a voltage measurement circuit and a display circuit which are connected with each other, the voltage measurement circuit measures the voltage led in by the conductive wire core 1, and the measurement result is transmitted to the voltage display screen 5 through the display circuit to be displayed.
Example 4:
as the optimization of the above embodiment, the inner insulating layer 2 is made of polytetrafluoroethylene, the breakdown voltage is more than 1000V and the thickness is 0.5mm, the outer insulating layer 4 is made of heat shrinkable tube type insulating material, the breakdown voltage is more than 1000V and the thickness is 0.5 mm. The shielding layer 3 is made of red copper and has a braided net structure. The voltage measurement module and the voltage display screen 5 are integrated at the probe handle, the size of the voltage display screen 5 is 400mmX200mm, and the voltage measurement precision is 0.5 level.
The present invention is not limited to the above-mentioned alternative embodiments, and various other products can be obtained by anyone under the teaching of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the following claims, and which can be used to interpret the claims.
Claims (10)
1. A generator stator slot potential measuring probe is characterized in that: including probe main part and probe handle (6), the one end and the probe handle (6) of probe main part are connected, the probe main part includes conductive core (1), internal insulation layer (2), shielding layer (3) and outer insulating layer (4), internal insulation layer (2) parcel is outside conductive core (1), shielding layer (3) parcel is inside insulating layer (2), outer insulating layer (4) parcel is outside shielding layer (3), probe handle (6) inside is equipped with voltage measurement module, is equipped with voltage display screen (5) on probe handle (6), and voltage measurement module's input is connected with conductive core (1), and voltage measurement module's output is connected with voltage display screen (5).
2. The generator stator slot potential measuring probe of claim 1, wherein: the front end of the conductive wire core (1) is provided with an exposed arc-shaped detection section.
3. The generator stator slot potential measuring probe of claim 2, wherein: the main body of the conductive wire core (1) is made of stainless steel wires with the diameter of 4mm and the length of 700mm, and the arc detection section at the front end of the conductive wire core (1) is in the shape of a quarter of an arc with the radius of 10 mm.
4. The generator stator slot potential measuring probe of claim 1, wherein: the tail end of the probe handle (6) is connected with a grounding wire (7), and the grounding wire (7) is connected and conducted with the grounding end of the voltage measuring module.
5. The generator stator slot potential measuring probe of claim 4, wherein: the ground wire (7) is 2.5mm2The soft wire is 10m in length.
6. The generator stator slot potential measuring probe of claim 1, wherein: the inner insulating layer (2) is made of polytetrafluoroethylene, the outer insulating layer (4) is a PET (polyethylene terephthalate) heat-shrinkable tube, and the outer insulating layer (4) is in seamless butt joint with the probe grip (6).
7. The generator stator slot potential measuring probe of claim 1, wherein: the shielding layer (3) is a copper woven mesh.
8. The generator stator slot potential measuring probe of claim 1, wherein: the probe grip (6) is made of silicon rubber.
9. The generator stator slot potential measuring probe of claim 1, wherein: the voltage measurement module comprises a voltage measurement circuit and a display circuit which are connected with each other, the input end of the voltage measurement circuit is connected with the conductive wire core (1), and the output end of the display circuit is connected with the voltage display screen (5).
10. The generator stator slot potential measuring probe of claim 1, wherein: the thickness of the inner insulating layer (2) and the thickness of the outer insulating layer (4) are both 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921985083.9U CN211179979U (en) | 2019-11-15 | 2019-11-15 | Generator stator slot potential measuring probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921985083.9U CN211179979U (en) | 2019-11-15 | 2019-11-15 | Generator stator slot potential measuring probe |
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| Publication Number | Publication Date |
|---|---|
| CN211179979U true CN211179979U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921985083.9U Active CN211179979U (en) | 2019-11-15 | 2019-11-15 | Generator stator slot potential measuring probe |
Country Status (1)
| Country | Link |
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| CN (1) | CN211179979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116736050A (en) * | 2023-05-16 | 2023-09-12 | 国网山东省电力公司临沂供电公司 | A wireless live detection device for deteriorated insulators |
-
2019
- 2019-11-15 CN CN201921985083.9U patent/CN211179979U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116736050A (en) * | 2023-05-16 | 2023-09-12 | 国网山东省电力公司临沂供电公司 | A wireless live detection device for deteriorated insulators |
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Address after: No.7 Tianyun Road, high tech Zone, Chengdu, Sichuan 610000 Patentee after: Guoneng Daduhe maintenance and installation Co.,Ltd. Address before: No.7 Tianyun Road, high tech Zone, Chengdu, Sichuan 610000 Patentee before: GUODIAN DADUHE MAINTENANCE & INSTALLATION Co.,Ltd. |