CN212136175U - System for installing built-in sensor of transformer oil valve - Google Patents
System for installing built-in sensor of transformer oil valve Download PDFInfo
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- CN212136175U CN212136175U CN202021195645.2U CN202021195645U CN212136175U CN 212136175 U CN212136175 U CN 212136175U CN 202021195645 U CN202021195645 U CN 202021195645U CN 212136175 U CN212136175 U CN 212136175U
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Abstract
The utility model relates to a system is used in installation of built-in sensor of transformer oil valve, wherein the system includes transformer box, transformer oil, fuel outlet valve and the special sealing washer of flange apron, the built-in sensor of fuel outlet valve, a fastening bolt, the fuel outlet valve install on transformer box, the built-in sensor of fuel outlet valve pass through fuel outlet valve and the special sealing washer of flange apron and a fastening bolt and the sealed butt joint installation of fuel outlet valve, the system still including the special interfacing apparatus of bleeding, the connecting tube of bleeding, the vacuum pump of taking the valve, the special interfacing apparatus one end of bleeding of taking the valve and the special aspirating hole butt joint of the built-in sensor of fuel outlet valve, the other end passes through the connecting tube of bleeding and is connected with the vacuum pump. Compared with the prior art, the utility model has the advantages of simple, practical, convenient debugging installation, can overcome existing defect.
Description
Technical Field
The utility model relates to a sensor's for transformer installation technique especially relates to a system is used in built-in sensor installation of transformer oil valve.
Background
The existing installation modes of the built-in ultrahigh frequency sensor of the large power transformer with the level of 110kV and above are three modes as shown in figure 1: 1) the method is characterized in that a built-in sensor is preset, holes are formed in the wall of a transformer tank or a top cover plate according to the size of the sensor, the sensor is directly contacted with transformer oil after being installed to couple electromagnetic wave signals generated by partial discharge, and the sensor needs to be installed when leaving a factory or installed on site after the transformer oil is released in overhaul; 2) the medium window is arranged externally, a hole is formed in the wall of the transformer tank or the top cover plate according to the size of the sensor, and the hole is shielded and sealed by using a sealing structure of an external insulating baffle plate to ensure that transformer oil cannot leak but prevent electromagnetic wave signals from being transmitted; 3) the oil drain valve is intrusive, namely the transformer oil drain valve is used as an installation channel, the sensor extends into a transformer box body and is directly contacted with transformer oil and then coupled with an electromagnetic wave signal generated by partial discharge, and the mode can be installed in a live state or a power failure state of a transformer substation, and is the most common installation mode of the ultrahigh frequency sensor of the transformer at present.
At present, the summary of the installation experience of the oil valve shows that: the existing sensor design and installation method has the defects that air in a space formed by a detachable flange cover plate and an oil valve easily enters the interior of a transformer, a large amount of bubbles generated when the air enters oil during offline installation enable the partial discharge value of an induction voltage withstand test of the transformer to exceed the standard, light gas action alarm is triggered during live installation, and then insulation breakdown is triggered by a large amount of bubbles generated in the oil to trigger heavy gas action and the transformer trips out to cause major faults of a power grid.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a system is used in installation of built-in sensor of transformer oil valve in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
the system comprises a transformer box body, transformer oil, an oil drain valve, a special sealing ring for the oil drain valve and a flange cover plate, an oil valve built-in sensor and a first fastening bolt, wherein the oil drain valve is arranged on the transformer box body, the oil valve built-in sensor is in sealing butt joint with the oil drain valve through the oil drain valve and the special sealing ring for the flange cover plate and the first fastening bolt, the system also comprises a special air exhaust butt joint device with a valve, an air exhaust connecting pipeline and a vacuum pump, one end of the special air exhaust butt joint device with the valve is in butt joint with a special air exhaust hole of the oil valve built-in sensor, and the other end of the special air exhaust butt joint device with the valve is connected with the vacuum pump through the air exhaust connecting pipeline.
Preferably, the system further comprises a pressure gauge arranged on the air exhaust connecting pipeline.
Preferably, the system further comprises a power source connected to the vacuum pump.
Preferably, the oil drain valve include special valve, can dismantle the apron, with transformer box fixed connection's body, can dismantle the apron respectively with oil drain valve and flange cover plate special sealing washer and first fastening bolt be connected for realize oil drain valve's encapsulated situation.
Preferably, the built-in sensor of the oil valve comprises a flange and a sensor probe, and the flange is fixedly connected with the sensor probe.
Preferably, the flange plate is provided with a special exhaust hole for the flange plate.
Preferably, the built-in sensor of the oil valve further comprises a sensor probe fixing pressing plate and a second fastening bolt, the flange plate is provided with a threaded hole, the sensor probe fixing pressing plate is provided with a threaded through hole, and the second fastening bolt realizes fastening connection of the flange plate and the sensor probe through the threaded through hole in the sensor probe fixing pressing plate and the threaded hole in the flange plate.
Preferably, a flange sealing ring is arranged at the contact position of the sensor probe and the flange plate.
Preferably, the sensor probe fixing pressure plate is in threaded fastening connection with the sensor probe.
Preferably, the power supply is connected with the pressure gauge.
Compared with the prior art, the utility model discloses a special aspirating hole of design on the built-in sensor ring flange of fuel tap, demolish transformer fuel tap apron, realize that sensor and fuel tap butt joint seal installation back utilize the vacuum pump to bleed to closing on vacuum state (being less than 100Pa) to based on the installation operation flow of design, realize "no air gets into in the transformer tank" the reliable installation of the built-in sensor of fuel tap under the operating mode. Therefore, the utility model has the advantages of simple and practical structure, convenient debugging and installation, and capability of overcoming the existing defects.
Drawings
FIG. 1 is a schematic diagram of a current installation mode of a built-in ultrahigh frequency sensor of a transformer;
FIG. 2 is a block diagram of a system according to a preferred embodiment of the present invention;
FIG. 3 is a schematic view of a fuel drain valve module according to a preferred embodiment of the present invention;
fig. 4 is a schematic diagram of an oil valve built-in sensor module according to a preferred embodiment of the present invention;
fig. 5 is a flow chart of the installation operation according to a preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
The utility model discloses starting from practical application, the customer service has built-in oil valve superfrequency sensor design and installation shortcoming now, provides a system is used in the built-in sensor installation of transformer oil valve, avoids inside flange apron and the air admission transformer in the oil valve formation space when the installation to but ensure sensor installation work's popularization nature, operability and practicality. The utility model discloses mainly through design special aspirating hole on the built-in sensor ring flange of fuel tap, demolish transformer fuel tap apron, realize sensor and fuel tap butt joint seal installation back, utilize the vacuum pump to bleed to closing on vacuum state (being less than 100Pa) to based on the installation operation flow of design, realize "no air gets into in the transformer tank" the built-in sensor's of fuel tap under the operating mode reliable installation. The device has the advantages of simplicity, practicability, convenience in debugging and installation, capability of overcoming the existing defects and the like.
As shown in fig. 2, the system for installing a sensor in a transformer oil valve at least comprises: the transformer oil-gas separation device comprises a transformer box body 1, transformer oil 2, an oil drain valve 3, a sealing ring 4 special for the oil drain valve and a flange cover plate, an oil valve built-in sensor 5, a first fastening bolt 6, a butt joint device 7 special for air exhaust with a valve, an air exhaust connecting pipeline 8, a pressure gauge 9, a vacuum pump 10 and a power supply 11. The connection relationship between the modules is as follows: the oil drain valve 3 is fixedly arranged on the transformer tank body 1 to realize the discharge of the transformer oil 2; the oil valve built-in sensor 5 is fixedly installed with the oil drain valve 3 in a sealing and butt joint mode by utilizing the oil drain valve, a special sealing ring 4 for a flange cover plate and a first fastening bolt 6; a special air-extracting butt joint device 7 with a valve is in butt joint with a special air-extracting hole of a flange plate in the oil valve built-in sensor 5 and is communicated with a pressure gauge 9 and a vacuum pump 10 by an air-extracting connecting pipeline 8; the power supply 11 provides working power for the pressure gauge 9 and the vacuum pump 10.
As shown in fig. 3, the oil drain valve 3 mainly includes a dedicated valve 31, a detachable cover plate 32, and a body 33 fixedly connected to the transformer tank 1. The connection relationship between the modules is as follows: the special valve 31 is opened to realize the discharge of the transformer oil 2 in the transformer tank 1; the detachable flange cover plate 32 realizes the sealing state of the oil drain valve 3 through the oil drain valve and the special flange cover plate sealing ring 4 and the first fastening bolt 6, but air exists in the space formed between the special valve 31 and the detachable flange cover plate 32 when the oil drain valve and the flange cover plate are installed.
As shown in fig. 4, the sensor 5 with an internal valve mainly includes a flange-dedicated air extraction hole 51, a flange 52, a threaded hole 53 in the flange, a seal ring 54, a bolt hole 55 in the flange, a sensor probe 56, a sensor probe fixing plate 57, a threaded through hole 58, and a second fastening bolt 59. The connection relationship between the modules is as follows: the sensor probe 56 and the flange plate 52 are sealed in a sliding way through 3 sealing rings 54 which are arranged in series; after field installation, as shown in fig. 2, the second fastening bolt 59 is used for fastening and connecting the flange plate 52 and the sensor probe 56 through the threaded through hole 58 on the sensor probe fixing pressure plate 57 and the threaded hole 53 on the flange plate 52; the fixed pressure plate 57 on the sensor probe 56 is in threaded fastening connection with the sensor probe 56.
The utility model provides a system is used in installation of built-in sensor of transformer oil valve, through designing special aspirating hole on the built-in sensor ring flange of oil valve promptly, demolish transformer oil valve apron, realize sensor and the butt joint seal installation back of oil valve, utilize the vacuum pump to bleed to closing on vacuum state (being less than 100Pa) to based on the installation operation flow of design, realize "no air gets into in the transformer oil tank" the reliable installation of the built-in sensor of oil valve under the operating mode.
The utility model provides a system is used in built-in sensor installation of transformer oil valve can realize the reliable installation of the built-in sensor of oil valve under "no air gets into in the transformer tank" operating mode.
The utility model provides a more effectual design than traditional built-in fuel tap sensor, it has special aspirating hole, and convenient butt joint is bled, and sensor probe passes through the multilayer sealing washer with the ring flange and realizes that the slidingtype is sealed, realizes that ring flange fixed mounting back sensor probe can push the operating function in the transformer box.
As shown in fig. 5, a system for installing a sensor in a transformer oil valve comprises the following steps:
step 3, the special air-extracting butt joint device with the valve is butt-jointed with a flange plate of the built-in sensor of the oil valve, and an air-extracting connecting pipeline is connected with a pressure gauge and a vacuum pump;
step 5, completely opening the oil drain valve of the transformer, pushing the sensor probe into the transformer box body, and utilizing a fastening bolt to realize fastening connection between the flange plate and the sensor probe through the sensor probe fixing pressure plate;
and 6, removing the special air exhaust butt joint device with the valve, installing a special oil plug to seal the exhaust hole of the flange plate, and finishing the installation of the sensor.
The system for installing the built-in sensor of the transformer oil valve comprises the following related materials and dimensional parameters:
transformer and oil valve main parameters
A 500kV single-phase transformer; the oil drain valve is a gate valve special for a transformer, and is of specification and model: Z45H-10C DN80, manufactured by Tahitian valve manufacturing, Inc.
Built-in sensor principal parameters
The probe is an ultrahigh frequency and ultrasonic integrated composite sensor, the total length of the probe is 300mm, the diameter phi is 30mm, the length of an insulating part is 100mm, and the outer diameter phi of a flange plate DN80 is 180 mm.
Pressure gauge and vacuum pump main parameters
A vacuum pump: n series FY-1H-N, rated voltage 220V/50Hz, air pumping speed 3.6m3H, limit pressure 2Pa, air inlet connecting thread 1/4 ";
a pressure gauge: DZA1 resistance vacuum gauge, numerical display units (Torr, Pa, mbar), vacuum measurement range: 1.0E5-5.0E-2Pa。
The utility model discloses just 1) oil valve sensor and 2) transformer definition, following explanation is done to 1 link:
1) oil valve sensor
The utility model relates to an oil valve sensor generally indicates the built-in superfrequency sensor of transformer oil valve, also can be based on superfrequency, ultrasonic wave or light pulse etc. of oil valve adopt the integrated composite sensor of optic fibre sensing detection technique.
2) Transformer device
The transformer may be a converter transformer with voltage class of +/-330 kV or more, or other special transformer with oil drain valve.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A system for installing a built-in sensor of a transformer oil valve comprises a transformer tank body (1), transformer oil (2), an oil drain valve (3), a special sealing ring (4) for the oil drain valve and a flange cover plate, a built-in sensor of the oil valve (5) and a first fastening bolt (6), the oil drain valve (3) is arranged on the transformer tank body (1), the oil valve built-in sensor (5) is in sealing butt joint with the oil drain valve (3) through the oil drain valve and a special sealing ring (4) for a flange cover plate and a first fastening bolt (6), it is characterized in that the system also comprises a special air-extracting butt joint device (7) with a valve, an air-extracting connecting pipeline (8) and a vacuum pump (10), one end of the special air exhaust butt joint device (7) with the valve is in butt joint with the special air exhaust hole of the oil valve built-in sensor (5), and the other end of the special air exhaust butt joint device is connected with the vacuum pump (10) through an air exhaust connecting pipeline (8).
2. The system for installing the built-in sensor of the oil valve of the transformer as claimed in claim 1, wherein the system further comprises a pressure gauge (9) arranged on the air extraction connecting pipe (8).
3. The system for installing the built-in sensor of the oil valve of the transformer as claimed in claim 2, wherein the system further comprises a power supply (11) connected with the vacuum pump (10).
4. The system for mounting the built-in sensor of the oil valve of the transformer according to claim 1, wherein the oil drain valve (3) comprises a special valve (31), a detachable cover plate (32) and a body (33) fixedly connected with a transformer box body, and the detachable cover plate (32) is respectively connected with a special sealing ring (4) of the oil drain valve and a flange cover plate and a first fastening bolt (6) and used for realizing the sealing state of the oil drain valve (3).
5. The system for installing the built-in sensor of the oil valve of the transformer as claimed in claim 1, wherein the built-in sensor (5) of the oil valve comprises a flange (52) and a sensor probe (56), and the flange (52) is fixedly connected with the sensor probe (56).
6. The system for mounting the built-in sensor of the oil valve of the transformer as claimed in claim 5, wherein the flange (52) is provided with a special flange air extracting hole (51).
7. The system for mounting the built-in sensor of the oil valve of the transformer according to claim 5, wherein the built-in sensor (5) of the oil valve further comprises a sensor probe fixing pressure plate (57) and second fastening bolts (59), the flange (52) is provided with threaded holes (53), the sensor probe fixing pressure plate (57) is provided with threaded through holes (58), and the second fastening bolts (59) realize the fastening connection of the flange (52) and the sensor probe (56) through the threaded through holes (58) on the sensor probe fixing pressure plate (57) and the threaded holes (53) on the flange (52).
8. The system for mounting the built-in sensor of the oil valve of the transformer as claimed in claim 5, wherein a flange sealing ring (54) is arranged at the contact position of the sensor probe (56) and the flange plate (52).
9. The system for installing the built-in sensor of the transformer oil valve as claimed in claim 7, wherein the sensor probe fixing pressure plate (57) is fastened and connected with the sensor probe (56) by threads.
10. The system for installing the sensor in the oil valve of the transformer as claimed in claim 3, wherein the power supply (11) is connected with the pressure gauge (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021195645.2U CN212136175U (en) | 2020-06-24 | 2020-06-24 | System for installing built-in sensor of transformer oil valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021195645.2U CN212136175U (en) | 2020-06-24 | 2020-06-24 | System for installing built-in sensor of transformer oil valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212136175U true CN212136175U (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021195645.2U Active CN212136175U (en) | 2020-06-24 | 2020-06-24 | System for installing built-in sensor of transformer oil valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212136175U (en) |
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2020
- 2020-06-24 CN CN202021195645.2U patent/CN212136175U/en active Active
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