CN107421776B - Transformer insulating oil seal sampling device - Google Patents
Transformer insulating oil seal sampling device Download PDFInfo
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- CN107421776B CN107421776B CN201710818521.1A CN201710818521A CN107421776B CN 107421776 B CN107421776 B CN 107421776B CN 201710818521 A CN201710818521 A CN 201710818521A CN 107421776 B CN107421776 B CN 107421776B
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- sampling
- oil duct
- valve
- torsion bar
- sealing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a transformer insulating oil sealing sampling device which comprises a torsion bar, a sealing torsion bar, a supporting body, an elastic head, an adapter and a sampling joint, wherein the torsion bar is arranged on the supporting body; the sealed torsion bar is inserted into the support body and is connected with the sampling valve for sampling under the cooperation of the elastic head and the adapter. The oil-immersed type electric equipment has the advantages of fine and exquisite structure, light and handfeel, good experience, suitability for single operation, adoption of a full pipeline-chamfering oil transportation mode in the device, tight connection of all parts, high sealing effect on oil and gas, less external pollution sources, ensuring the cleanliness of the extracted oil sample, and capability of truly reflecting the health condition of the oil-immersed type electric equipment by experimental data; the invention can be matched with sampling valves of various valves with different shapes to sample, and has the advantages of multipurpose and strong applicability.
Description
Technical Field
The invention relates to an insulating oil sample sampling device of oil immersed electrical equipment, in particular to a transformer insulating oil sealing sampling device.
Background
The requirements on sampling quality in detection projects such as transformer insulating oil chromatographic analysis, breakdown voltage, moisture, gas content, granularity and the like are very high, the sampling is carried out by adopting the connection of a syringe, a three-way valve and a hose according to GB/T7597-2007, and the experimental data can not truly reflect the health condition of oil immersed electrical equipment after the experimental analysis of the oil sample is taken due to the fact that the sampling device is or the sealing effect between the sampling device and related components is not good. In the actual sampling process, insulating oil leaks around the sampling valve due to the fact that the sampling valve is not tightly sealed, the environment is polluted, and operating personnel can be misled to have the oil immersion phenomenon for the transformer body. Oil immersed electrical equipment manufacturers are more, not all sampling valves can meet the sampling requirement of GB/T7595-2007, direct sampling is adopted under the general condition, and oil samples can be polluted by outside air to influence the authenticity of experimental data.
Disclosure of Invention
The invention aims to solve the technical problem of providing the transformer insulating oil sealing sampling device which has a fine and exquisite structure and a good sealing effect and can be matched with sampling valves of various valves in different shapes for sampling.
In order to solve the technical problems, the insulating oil seal sampling device for the transformer comprises a torsion bar, a seal torsion bar, a support body, an elastic head, an adapter and a sampling connector;
the middle section of the sealing torsion bar is provided with a horizontal groove which horizontally penetrates through the bar body, the front section of the sealing torsion bar is internally provided with an oil duct communicated with the horizontal groove, the outer section of the oil duct is a thick oil duct with a regular hexagon cross section, the inner section of the oil duct is a fine oil duct with a circular cross section, the fine oil duct is communicated with the horizontal groove, and the joint of the thick oil duct and the fine oil duct is designed into a sealing chamfer of C0.8; the upper end part of the sealing torsion bar is vertically connected with the torsion bar;
the inside of the support body is a hollow cylindrical track, a sampling hole corresponding to the horizontal groove is formed in the middle section wall of the support body, and the sampling joint is in threaded connection with the sampling hole for sampling; the upper end part of the support body is provided with a compression ring, a pressure head is sleeved outside the compression ring, the lower end part of the pressure head is provided with a soft resistance pad, the sealing torsion bar is inserted into the track from the upper end part of the support body and can freely rotate in the track, the compression ring is in threaded connection with the pressure head, and the pressure head is screwed to tightly fix the support body and the sealing torsion bar; threads are arranged outside the lower end head of the support body;
the elastic head comprises an oil duct end and a valve end which are communicated with each other, the shape of the oil duct end is a regular hexagon cylinder matched with the crude oil duct, and the end of the oil duct end is designed to be an outer chamfer of C1.0 and matched with a sealing chamfer in the oil duct;
the side wall of the adapter is provided with a second sampling hole which is in threaded connection with the inner end of the sampling connector;
the oil duct end of the elastic head is inserted into the rough oil duct from the lower port of the sealed torsion bar, and the adapter wraps the lower end head of the support body and is in threaded connection with the support body; the valve end is connected with the sampling valve.
Further, annular sealing grooves are arranged above and below the horizontal groove of the sealing torsion bar, and sealing rings are arranged at the sealing grooves.
Further, the upper section of the sealing torsion bar is provided with at least one upper limit hole, the lower end of the sealing torsion bar and the section of the rough oil duct are provided with lower limit holes communicated with the rough oil duct, and limit screws are arranged in the upper limit holes and the lower limit holes.
Furthermore, the inside of the valve end of the elastic head is a regular hexagon groove, the inside of the oil duct end is a cylindrical pipe, the inner joint of the oil duct end and the valve end is designed into an inner chamfer of C2.0, and the valve end is connected with a sampling valve with a hexagon valve for sampling.
Furthermore, the inside of the valve end of the elastic head is a square groove, the inside of the oil duct end is a square pipe, the inner joint of the oil duct end and the valve end is designed into an inner chamfer of C2.0, and the valve end is connected with a sampling valve with a square valve for sampling.
Furthermore, the valve end of the elastic head is rectangular, and is matched with a sampling valve with a straight valve, and sampling is carried out through a second sampling hole.
The main sealing parts, such as the chamfer design of the joints of the sealing torsion bar, the elastic head and the like, have the sealing performance in direct proportion to the acting force, and ensure good sealing performance in the sampling process; the compression ring, the pressure head and the soft resistance pad are fixed at the upper end part of the support body in a threaded connection mode, and have resistance action on the sealing torsion bar, namely in the process of screwing the pressure head, the pressure head presses the compression ring, the compression ring presses the soft resistance pad, the soft resistance pad expands towards two sides after being stressed, and then the sealing torsion bar is held, so that the free movement of the sealing torsion bar is prevented; the sealing groove is matched with the sealing ring, so that the sealing effect is further enhanced, the sealing effect on the oil in a liquid form is good, even if gas is completely isolated, the cleanliness of the oil sample is guaranteed to the maximum extent, and after experimental analysis, experimental data can truly reflect the health condition of oil-immersed electrical equipment.
The invention has the beneficial effects that: the oil-immersed type electric equipment has the advantages of fine and exquisite structure, light and handfeel, good experience, suitability for single operation, adoption of a full pipeline-chamfering oil transportation mode in the device, tight connection of all parts, high sealing effect on oil and gas, less external pollution sources, ensuring the cleanliness of the extracted oil sample, and capability of truly reflecting the health condition of the oil-immersed type electric equipment by experimental data; the device can well protect the sampling valve, and effectively prevent the valve of the sampling valve from being screwed off or damaged; for the transformer sampling valve with oil leakage in the sampling process, the leaked insulating oil can be timely recovered into a recovery container, so that the pollution to the environment is reduced; the design of the elastic head can be matched with the sampling valves of the most common valves with different shapes such as regular hexagons, squares, lines and the like to sample, so that the multifunctional valve has the advantages of multipurpose, greatly enhanced applicability and reduced equipment.
Drawings
FIG. 1 is a schematic cross-sectional view of a sealing torsion bar according to the present invention;
FIG. 2 is a schematic cross-sectional view of a support according to the present invention;
FIG. 3 is a schematic cross-sectional view of the takeup head (regular hexagon) according to one embodiment;
FIG. 4 is a bottom view of the slackening joint (regular hexagon) according to one embodiment;
FIG. 5 is a top view of the takeup head (regular hexagon) of the first embodiment;
FIG. 6 is a schematic diagram showing the cooperation of a regular hexagonal elastic head and a hexagonal valve sampling valve according to an embodiment;
FIG. 7 is a schematic diagram showing the cooperation of a square elastic head and a square valve sampling valve according to the second embodiment;
FIG. 8 is a schematic diagram showing the cooperation of a three-line shaped elastic head and a line shaped valve sampling valve;
FIG. 9 is a schematic view of the structure of the present invention (non-working state);
FIG. 10 is a schematic view of the structure (before/after sampling) in the working state of the present invention;
FIG. 11 is a schematic cross-sectional view (in sampling) of the present invention in operation.
In the above figures: 1-a torsion bar; 2-sealing the torsion bar; 21-horizontal slots; 22-oil duct; 23-sealing the groove; 24-sealing rings; 25-upper limit holes; 26-a lower limit hole; 27-limiting screws; 221-a crude oil duct; 222-fine oil ducts; 223-sealing chamfer; 3-a support; 31-track; 32-sampling holes; 33-a compression ring; 34-indenter; 35-soft resistance pad; 4-an elastic head; 41-oil duct end; 42-valve end; 43-outer chamfering; 44-inner chamfering; a 5-adapter; 51-a second sampling hole; 6-sampling joint; 7-a sampling valve; 71-sampling valve; 71-sampling valve base.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
The invention relates to a transformer insulating oil seal sampling device which comprises a torsion bar 1, a seal torsion bar 2, a support body 3, an elastic head 4, an adapter 5 and a sampling joint 6;
the middle section of the sealing torsion bar 2 is provided with a horizontal groove 21 horizontally penetrating through the bar body, the front section of the sealing torsion bar 2 is internally provided with an oil duct 22 communicated with the horizontal groove 21, the outer section of the oil duct 22 is a thick oil duct 221 with a regular hexagon cross section, the inner section of the oil duct 22 is a thin oil duct 222 with a circular cross section, the thin oil duct 222 is communicated with the horizontal groove 21, and the joint of the thick oil duct 221 and the thin oil duct 222 is designed into a sealing chamfer 223 with C0.8; the upper end part of the sealing torsion bar 2 is vertically connected with the torsion bar 1;
the inside of the supporting body 3 is a hollow cylindrical track 31, a sampling hole 32 corresponding to the horizontal groove 21 is arranged on the middle section wall of the supporting body 3, and the sampling joint 6 is in threaded connection with the sampling hole 32 for sampling; the upper end part of the support body 3 is provided with a compression ring 33, a pressure head 34 is sleeved outside the compression ring 33, the lower end part of the pressure head 34 is provided with a soft resistance pad 35, the sealing torsion bar 2 is inserted into the track 31 from the upper end part of the support body 3 and can freely rotate in the track 31, the compression ring 33 is in threaded connection with the pressure head 34, and the pressure head 34 is screwed tightly so that the support body 3 and the sealing torsion bar 2 are tightly fixed; threads are arranged outside the lower end head of the support body 3;
the elastic head 4 comprises an oil duct end 41 and a valve end 42 which are communicated with each other, the shape of the oil duct end 41 is a regular hexagon cylinder matched with the crude oil duct 221, and the end of the oil duct end 41 is designed into an outer chamfer 43 of C1.0 and matched with a sealing chamfer 223 in the oil duct 22;
the side wall of the adapter 5 is provided with a second sampling hole 51, and the second sampling hole 51 is in threaded connection with the inner end of the sampling connector 6;
the oil duct end 41 of the elastic head 4 is inserted into the thick oil duct 221 from the lower port of the sealing torsion bar 2, and the adapter 5 wraps the elastic head 4 and is sleeved on the lower end head of the supporting body 3 and is in threaded connection with the supporting body 3; the valve end 42 is connected to the sampling valve 7.
Further, the horizontal groove 21 of the torsion bar 2 of the present invention is provided with annular seal grooves 23 at the upper and lower sides, and seal rings 24 are provided at the seal grooves 23.
Further, the upper section of the sealing torsion bar 2 is provided with at least one upper limit hole 25, the section of the coarse oil duct at the lower end of the sealing torsion bar 2 is provided with a lower limit hole 26 communicated with the coarse oil duct, and limit screws 27 are arranged in the upper limit hole 25 and the lower limit hole 26.
Further, the inside of the valve end 42 of the elastic head 4 is a regular hexagon groove, the inside of the oil duct end 41 is a cylindrical pipe, the inner connection part of the oil duct end 41 and the valve end 42 is designed into an inner chamfer 44 of C2.0, and the valve end 42 is connected with the sampling valve 7 with a hexagonal valve for sampling.
Further, the inside of the valve end 42 of the elastic head 4 is a square groove, the inside of the oil duct end 41 is a square pipe, the inner joint of the oil duct end 41 and the valve end 42 is designed into an inner chamfer 44 of C2.0, and the valve end 42 is connected with the sampling valve 7 with a square valve for sampling.
Further, the valve end 42 of the elastic head 4 is rectangular, and the valve end 42 is matched with the sampling valve 7 with a straight valve, and samples are taken through the second sampling hole 51.
Embodiment one: the embodiment introduces the situation that the elastic head is connected with the sampling valve with the hexagonal valve of the sampling valve for sampling.
The structure of the sealed torsion bar 2 is shown in fig. 1, a regular hexagon groove with the length of 15mm and the side length of 3.5mm is designed in the front section, namely a thick oil duct 221, a cylindrical groove with the length of 12.2mm and the radius of 2mm is designed in the front section, namely a thin oil duct 222, an inner chamfer C0.8 is designed at the joint of the thin oil duct and the thick oil duct, namely a sealed chamfer 223, and the embedded regular hexagon thick oil duct can enable the oil duct end 41 of the elastic head 4 to be inserted into the inner chamfer C0.8; the sealing chamfer 223 (C0.8) has the same angle with the outer chamfer 43 (C1.0) of the head oil gallery end 41, but has different depths (the depth refers to the horizontal length of the chamfer), and the sealing effect between the sealing torsion bar and the head gradually increases with the increase of the acting force under the action of the resistance of the soft resistance pad 35 at the top end of the support body 3 and the reverse thrust of the valve 71 of the sampling valve 7. The first and second upper limit holes 25 with the length of M3 x 5 are respectively arranged at the positions 14mm and 26mm away from the top of the sealing torsion bar 2, the lower limit hole 26 with the length of M3 x 5 is arranged at the position 92.3mm away from the top of the sealing torsion bar 2, the upper limit hole and the lower limit hole are matched with the limit screw 27 with the length of M3 x 8, and the sealing torsion bar 2 and the valve 71 of the sampling valve can move freely in an effective stroke; when the lower limit hole 26 of the sealing torsion bar is matched with the limit screw rod 27 and the thick oil duct 221 is sleeved with the oil duct end 41 of the elastic head, the thread of the limit screw rod 27 is pushed to contact with the outer wall of the oil duct end, so that the elastic head 4 can be fastened, and the elastic head is prevented from slipping in the whole sampling process; the cylindrical horizontal groove 21 with the inner diameter of 8mm and penetrating completely in the horizontal direction is formed at the position 64.4mm away from the top of the sealing torsion bar 2, the horizontal groove 21 is communicated with an oil duct in the front section of the sealing torsion bar, a circular sealing groove 23 with the width of 1.2mm and the depth of 1mm is formed at the upper and lower 3mm positions of the horizontal groove and the outer wall of the sealing torsion bar 2 respectively, a sealing ring 24 is arranged in the circular sealing groove, and insulating oil in the oil duct is difficult to overflow under the cooperation of the sealing ring.
The supporting body 3 is shown in fig. 2, a cylindrical track 31 in the supporting body is 45.5mm long and 7mm in radius, and the track 31 provides a moving track for the sealing torsion bar 2; the length of the section of the pressure head 8 and the pressure ring 9 is 10mm, the radius is 8mm, and the larger radius provides a certain space for the expansion of the soft resistance pad 10 (the soft resistance pad expands to the periphery in the extrusion process), and the soft resistance pad 10, the pressure ring 9 and the pressure head 8 cooperate to generate resistance action on the sealing torsion bar 2. At a distance of 28mm from the upper end of the support, a sampling hole 32 of 8mm effective length, M4.62 x 0.8, is designed, which can be fitted with a sampling nipple 6. And the outer design M28 x 1.5 of the lower end head of the support body 3 and an external thread with the effective length of 10mm are matched with the adapter 5, and are in sealing connection with the sampling valve 7 for sampling.
In this embodiment, the elastic head 4 is a hexagonal elastic head, as shown in fig. 3, 4 and 5, the elastic head 4 is composed of an oil duct end 41 and a valve end 42, and the inside of the valve end 42 is a regular hexagonal groove, namely a regular hexagonal groove with a length of 15mm and a side length of 6.93 mm; the oil duct end 41 is a regular hexagon column with the length of 14mm and the side length of 3.5mm, a cylindrical groove with the length of 45.5mm and the radius of 7mm is arranged in the oil duct end, the tail end is designed to be an outer chamfer 43 of C1.0, and when the oil duct end 41 is matched with a sealing chamfer 223 (C0.8) in the sealing torsion bar 2, the sealing performance is better and better under the resistance of a soft resistance pad and the thrust action of a sampling valve; the internal connection of the oil channel end 41 and the valve end 42 is designed as an internal chamfer 44 of C2.0, and the valve end 42 has good sealing performance when being connected and matched with the hexagonal valve 71 of the sampling valve 7.
The sampling process of the sampling device of the present invention is shown in fig. 10 and 11. Before sampling, the sampling device is screwed on a base 72 of a sampling valve 7 through an adapter 5, and a torsion bar rotates positively and negatively in the screwing process, so that the largest part of the valve space of the sampling valve completely enters the valve end 42 of the elastic head 4, one end of the sampling connector 6 is in threaded sealing connection with a sampling hole 32 on the support body 3, and the other end of the sampling connector is connected with a hose or a double-ended needle for sampling; in the sampling process, the torsion bar 1 is rotated anticlockwise by manpower to drive the sealing torsion bar 2 to move upwards, and the internal sealing effect of the whole device can be gradually increased under the action of the resistance of the soft resistance pad 35 and the thrust of the sampling valve 72. The elastic head is matched with the regular hexagon valve sampling valve, the limit screw 27 at the upper end is arranged at the position of the second upper limit hole 25, the limit screw rotates anticlockwise for about 2 circles, the transformer insulating oil flows out from the sampling valve 72, flows into a clean hose or a double-ended needle through the oil duct end in the elastic head 4, the oil duct 22 in the sealing torsion bar 2, the horizontal groove 21 in the sealing torsion bar 2 and the sampling joint 6, and flows into a sampling container to finish sampling. After sampling, unscrewing the pressure head 34, releasing the resistance of the soft resistance pad 35, applying thrust to the top end of the sealing torsion bar 2, and rotating the torsion bar 1 clockwise; tightening the sampling valve 72 under the cooperation of the thrust and torsion bar 1; the transformer insulating oil sealing sampling device is disassembled, and the residual oil and the leaked oil in the device and the hose are recovered by a recovery container.
Embodiment two: the embodiment describes the case where the elastic head is connected to a square sampling valve for sampling. In the embodiment, the inside of the valve end 42 of the elastic head 4 is a square groove, the inner connection part of the oil duct end 41 and the valve end 42 is designed into an inner chamfer 44 with a value of C2.0, and the valve end 42 is connected with the sampling valve 7 with a square valve for sampling; the rest is the same as the first embodiment.
Embodiment III: the embodiment introduces the situation that the elastic head is matched with the sampling valve in a straight shape with the sampling valve for sampling.
In this embodiment, the valve end 42 of the elastic head 4 is in a solid rectangular shape similar to a screwdriver, the sampling device is screwed on the base 72 of the sampling valve 7 through the adapter 5, the valve end 42 is inserted into the valve 71 of the linear sampling valve 7, one end of the sampling connector 6 is in threaded sealing connection with the second sampling hole 51 on the adapter 5, the other end of the sampling connector is connected with a hose or a double-ended needle for sampling, the elastic head is matched with the linear valve sampling valve, the limit screw 27 at the upper end is installed at the first upper limit hole, the torsion bar is rotated counterclockwise for about 8 circles, the valve end opens the valve, the transformer insulating oil flows out from the sampling valve 72, samples through the second sampling hole 51, and the insulating oil flows into the clean hose or double-ended needle through the clean adapter 5 and the sampling connector 6, and then flows into the sampling container to complete the sampling; the rest is the same as the first embodiment.
For the sampling valve with oil leakage, the oil leakage directly flows into the hose and the recovery container through the second sampling hole 51 and the sampling joint 6; if the sampling valve with the linear elastic head is adopted for oil leakage, the oil sample and the oil leakage sample flow into the hose or the double-ended needle from the sampling joint together and then flow into the sampling container without recovering the oil leakage sample, and at the moment, the inside of the adapter is flushed at least three times by using the insulating oil of the transformer body.
Claims (6)
1. The insulating oil seal sampling device for the transformer comprises a torsion bar (1), a seal torsion bar (2), a support body (3), an elastic head (4), an adapter (5) and a sampling joint (6), and is characterized in that,
the middle section of the sealing torsion bar (2) is provided with a horizontal groove (21) horizontally penetrating through the bar body, the front section of the sealing torsion bar (2) is internally provided with an oil duct (22) communicated with the horizontal groove (21), the outer section of the oil duct (22) is a thick oil duct (221) with a regular hexagon cross section, the inner section of the oil duct is an fine oil duct (222) with a circular cross section, the fine oil duct (222) is communicated with the horizontal groove (21), and the joint of the thick oil duct (221) and the fine oil duct (222) is designed into a sealing chamfer (223) with C0.8; the upper end part of the sealing torsion bar (2) is vertically connected with the torsion bar (1);
the inside of the support body (3) is a hollow cylindrical track (31), a sampling hole (32) corresponding to the horizontal groove (21) is formed in the middle section wall of the support body (3), and the sampling joint (6) is in threaded connection with the sampling hole (32) for sampling; the upper end part of the support body (3) is provided with a compression ring (33), a pressure head (34) is sleeved outside the compression ring (33), the lower end part of the pressure head (34) is provided with a soft resistance pad (35), the sealing torsion bar (2) is inserted into the track (31) from the upper end part of the support body (3) and can freely rotate in the track (31), the compression ring (33) is in threaded connection with the pressure head (34), and the compression head (34) is screwed tightly to fix the support body (3) and the sealing torsion bar (2); threads are arranged outside the lower end head of the support body (3);
the elastic head (4) comprises an oil duct end (41) and a valve end (42) which are connected with each other, the shape of the oil duct end (41) is a regular hexagon cylinder matched with the crude oil duct (221), and the end of the oil duct end (41) is designed into an outer chamfer (43) of C1.0 and matched with a sealing chamfer (223) in the oil duct (22);
the side wall of the adapter joint (5) is provided with a second sampling hole (51), and the second sampling hole (51) is in threaded connection with the inner end of the sampling joint (6);
the oil duct end (41) of the elastic head (4) is inserted into the crude oil duct (221) from the lower port of the sealing torsion bar (2), and the adapter (5) wraps the elastic head (4) and is sleeved at the lower end head part of the supporting body (3) and is in threaded connection with the supporting body (3); the valve end (42) is connected with the sampling valve (7).
2. The transformer insulating oil seal sampling device according to claim 1, wherein annular seal grooves (23) are arranged on the upper and lower sides of the horizontal groove (21) of the seal torsion bar (2), and a seal ring (24) is arranged at the seal groove (23).
3. The transformer insulating oil seal sampling device according to claim 1 or 2, wherein the upper section of the seal torsion bar (2) is provided with at least one upper limit hole (25), the lower end of the seal torsion bar (2) and the section of the rough oil duct are provided with a lower limit hole (26) communicated with the rough oil duct, and limit screws (27) are arranged in the upper limit hole (25) and the lower limit hole (26).
4. Transformer insulating oil seal sampling device according to claim 1 or 2, characterized in that the inside of the valve end (42) of the elastic head (4) is a regular hexagonal groove, the inside of the oil duct end (41) is a cylindrical pipe, the internal connection of the oil duct end (41) and the valve end (42) is designed into an internal chamfer (44) of C2.0, and the valve end (42) is connected with a sampling valve (7) with a hexagonal valve for sampling.
5. Transformer insulating oil seal sampling device according to claim 1 or 2, characterized in that the inside of the valve end (42) of the elastic head (4) is a square groove, the inside of the oil duct end (41) is a cylindrical pipe, the internal connection of the oil duct end (41) and the valve end (42) is designed into an internal chamfer (44) of C2.0, and the valve end (42) is connected with a sampling valve (7) with a square valve for sampling.
6. The transformer insulation oil seal sampling device according to claim 1 or 2, characterized in that the valve end (42) of the elastic head (4) is rectangular, the valve end (42) is matched with a sampling valve (7) with an in-line valve, and sampling is carried out through a second sampling hole (51).
Priority Applications (1)
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| CN201710818521.1A CN107421776B (en) | 2017-09-12 | 2017-09-12 | Transformer insulating oil seal sampling device |
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| CN201710818521.1A CN107421776B (en) | 2017-09-12 | 2017-09-12 | Transformer insulating oil seal sampling device |
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| CN107421776A CN107421776A (en) | 2017-12-01 |
| CN107421776B true CN107421776B (en) | 2023-07-25 |
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| CN107421776A (en) | 2017-12-01 |
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