CN110608919A - Oil taking device of mutual inductor - Google Patents
Oil taking device of mutual inductor Download PDFInfo
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- CN110608919A CN110608919A CN201910905220.1A CN201910905220A CN110608919A CN 110608919 A CN110608919 A CN 110608919A CN 201910905220 A CN201910905220 A CN 201910905220A CN 110608919 A CN110608919 A CN 110608919A
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- oil taking
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- 238000007789 sealing Methods 0.000 claims abstract description 101
- 238000009434 installation Methods 0.000 claims abstract description 61
- 230000001681 protective effect Effects 0.000 claims description 45
- 230000002093 peripheral effect Effects 0.000 claims description 40
- 238000000605 extraction Methods 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 2
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000008451 emotion Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
-
- 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
- G01N2001/1031—Sampling from special places
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- Physics & Mathematics (AREA)
- Hydrology & Water Resources (AREA)
- Sampling And Sample Adjustment (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a mutual inductor oil taking device which comprises a mounting valve seat, wherein an oil outlet channel which is through along the axial direction is arranged in the mounting valve seat, an oil taking thimble group which is arranged in a sliding mode along the axial direction is arranged in the oil outlet channel, the propping end of the oil taking thimble group extends from the oil inlet end of the oil outlet channel and then extends towards a sealing ball used for sealing an oil taking port of a transformer, and the stressed end of the oil taking thimble group extends towards the oil outlet end of the oil outlet channel. The oil outlet end of the mounting valve seat is connected with an oil taking joint group communicated with the oil outlet channel, the first end of the oil taking joint group is connected with the stress end of the oil taking thimble group after extending into the oil outlet channel from the oil outlet end of the oil outlet channel, and the second end of the oil taking joint group is a detachable extending end which is positioned outside the mounting valve seat and used for containing sample oil. The oil taking device of the mutual inductor further comprises a protection sleeve group used for sealing and protecting the installation valve seat and the oil taking connector group, and the protection sleeve group is sleeved outside the installation valve seat and is detachably connected with the installation valve seat.
Description
Technical Field
The invention relates to the technical field of electrical equipment detection, in particular to an oil taking device of a mutual inductor. In addition, the invention also relates to a transformer comprising the mutual inductor oil taking device.
Background
Because of the mutual-inductor need carry out oil sample analysis experiment when the field acceptance, in addition, when the running state that needs to know the mutual-inductor is good, in setting for the period, also need carry out insulation detection to the mutual-inductor. After the oil sample is extracted, whether the characteristic gas of the oil sample has obvious change is checked by chromatographic analysis, and whether the main insulation aspect of the oil sample has problems can be found. In the prior art, the oil discharge port of the mutual inductor is connected with a conventional oil discharge valve, and when an oil sample needs to be extracted, the oil discharge valve is opened to adopt oil taking equipment to take oil. The conventional oil drain valve can be opened to take an oil sample by using an additional tool for matching, so that the operation is inconvenient; in the conventional oil drain valve, oil in an oil-filled product is easy to spray out in the oil taking process, so that inconvenience is brought to the oil taking work of electric workers, and the conflict emotion of the workers is also caused; some oil discharge ports are positioned at high places, so that electric workers can reach corresponding positions only by means of ladders and can take oil only by carrying additional tools, and great inconvenience is brought to work; the conventional oil drain valve is made of cast iron mostly and is exposed outdoors all the year round, and risks such as wire slipping, rusting and fracture are easy to occur due to repeated oil taking operation, so that potential hazards are brought to safe operation of the transformer.
Disclosure of Invention
The invention provides a mutual inductor oil taking device and a transformer with the same, and aims to solve the technical problems that an additional tool is required to be used when a conventional oil drain valve is used for taking oil, the operation is inconvenient, and potential safety hazards exist in the operation of the transformer.
The technical scheme adopted by the invention is as follows:
a mutual inductor oil taking device comprises an installation valve seat detachably connected with an oil taking port of a transformer, an oil outlet channel axially penetrating through the installation valve seat is arranged in the installation valve seat, an oil taking thimble group which is arranged in a sliding mode along the axial direction is arranged in the oil outlet channel, the propping end of the oil taking thimble group extends from the oil inlet end of the oil outlet channel and then extends towards a sealing ball direction for sealing the oil taking port of the transformer, and the stressed end of the oil taking thimble group extends towards the oil outlet end of the oil outlet channel; the oil outlet end of the mounting valve seat is detachably connected with an oil taking joint group communicated with the oil outlet channel, the first end of the oil taking joint group extends into the oil outlet channel from the oil outlet end of the oil outlet channel and then is connected with the stress end of the oil taking thimble group, the second end of the oil taking joint group is an extending end which is positioned outside the mounting valve seat and is detachably connected with an oil container containing sample oil, and the extending end is also used for bearing external force to push the oil taking thimble group to slide towards the direction close to the sealing ball so that the abutting end pushes the sealing ball to open the sealing ball and further the oil outlet channel is communicated with an oil taking port of the transformer, or pushes the oil taking thimble group to slide towards the direction far away from the sealing ball so that the abutting end loosens the sealing ball and further the sealing ball reseals the oil taking port of the transformer under the action of pressure; the oil taking device of the mutual inductor further comprises a protection sleeve group used for sealing and protecting the installation valve seat and the oil taking connector group, and the protection sleeve group is sleeved outside the installation valve seat and is detachably connected with the installation valve seat.
Furthermore, the mounting valve seat is in a hollow cylinder shape with two communicated ends, and an oil outlet channel is formed by a shaft hole of the mounting valve seat; the outer peripheral wall of the oil inlet end of the mounting valve seat is provided with a first external thread, the inner peripheral wall of the transformer oil taking port is provided with a first internal thread, the oil inlet end of the mounting valve seat is inserted into the transformer oil taking port and is in meshed connection with the first internal thread through the first external thread so that the mounting valve seat is detachably connected with the transformer; the second internal thread is arranged on the inner peripheral wall of the oil outlet end of the mounting valve seat, the second external thread is arranged on the outer circle of the first end of the oil taking joint group, the first end stretches into the mounting valve seat from the oil outlet end of the mounting valve seat and then the second external thread is connected with the second internal thread in a matched mode, so that the first end slides along the axial direction of the oil outlet channel in the process of screwing the oil taking joint group, and then the oil taking thimble group is pushed to slide.
Furthermore, the oil extraction thimble group comprises a rod-shaped oil extraction thimble and a telescopic spring for providing elastic force for stretching along the axial direction; the oil taking thimble is arranged in the oil outlet channel in a sliding manner along the axial direction of the oil outlet channel, the propping end of the oil taking thimble extends out of the oil inlet end of the oil outlet channel and then extends towards the sealing ball, and the stress end of the oil taking thimble is inserted into the first end of the oil taking joint group along the axial direction; the telescopic spring is sleeved on the excircle of the oil taking thimble, and two ends of the telescopic spring respectively prop against the end faces of the oil taking thimble and the first end of the oil taking joint group.
Furthermore, a first convex annular limiting flange is arranged on the outer circle of the oil taking thimble and is used for abutting against the end face of the expansion spring so as to limit the expansion spring along the axial direction; the end face of the first limiting flange towards the abutting end is an outer conical surface, an inner conical surface is arranged on the inner peripheral wall of the oil outlet channel, the conical degrees of the inner conical surface and the outer conical surface are different, the inner conical surface and the outer conical surface cooperate to guide the flow of the sample oil in the oil outlet channel, and the inner conical surface and the outer conical surface are used for adjusting the flow of the sample oil in the oil outlet channel.
Furthermore, the oil taking joint group comprises an oil taking joint, the oil taking joint is in a hollow cylinder shape with two communicated ends, the shaft hole of the oil taking joint is communicated with the oil outlet channel, a second external thread is processed on the excircle of the extending section of the oil taking joint extending into the oil outlet channel, and the stress end of the oil taking thimble extends into the shaft hole of the oil taking joint along the axial direction; the limiting section of the oil taking connector, which is positioned outside the mounting valve seat, is communicated with a plurality of oil receiving nozzles, the sizes and the models of the oil receiving nozzles are different, each oil receiving nozzle is provided with a control valve for controlling the on-off of the corresponding oil receiving nozzle, and the peripheral wall of each oil receiving nozzle is provided with a connecting structure which is detachably connected with an oil container to be matched and connected.
Further, the oil taking joint group comprises an oil taking joint and an oil outlet joint; the oil taking joint is in a hollow cylindrical shape with two communicated ends, the shaft hole of the oil taking joint is communicated with the oil outlet channel, a second external thread is processed on the excircle of the stretching section of the oil taking joint stretching into the oil outlet channel, and the stress end of the oil taking thimble stretches into the shaft hole of the oil taking joint along the axial direction; the oil outlet joint is in an end cover shape, a third internal thread is processed on the inner peripheral wall of the oil outlet joint, a third external thread is processed on the outer peripheral wall of the oil outlet end of the mounting valve seat, the oil outlet joint is sleeved on the excircle of the oil outlet end of the mounting valve seat by a limiting section of the oil taking joint positioned outside the mounting valve seat, and the oil outlet joint is detachably connected with the mounting valve seat through the matching of the third internal thread and the third external thread; the outer end face of the oil outlet connector is communicated with a plurality of oil receiving nozzles, the sizes and the types of the oil receiving nozzles are different, each oil receiving nozzle is provided with a control valve used for controlling the on-off of the corresponding oil receiving nozzle, and the peripheral wall of each oil receiving nozzle is provided with a connecting structure detachably connected with an oil container to be matched and connected.
Furthermore, a second convex annular limiting flange is arranged on the end face, facing the extending-in section, of the limiting section of the oil taking joint and is used for abutting against the end face of the oil outlet end of the mounting valve seat so as to limit the depth of the extending-in section of the oil taking joint screwed into the oil outlet channel; the oil taking joint group also comprises a first sealing ring piece used for sealing a gap between the oil taking joint and the oil outlet channel, and the first sealing ring piece is arranged on the excircle of the stretching-in section and is positioned between the excircle of the stretching-in section and the mounting valve seat.
Further, the protective sleeve set comprises a first protective cylinder, wherein the first protective cylinder is in a semi-closed hollow cylinder shape with one end open and the other end closed; a fourth external thread is processed on the excircle of the mounting valve seat, and a fourth internal thread matched with the fourth external thread on the excircle of the mounting valve seat is arranged on the inner peripheral wall of the opening end of the first protective cylinder; or the excircle of the installation valve seat is processed with an indent and is an annular first ring groove, a second sealing ring piece is arranged in the first ring groove, the excircle of the installation valve seat is also provided with an annular first limiting step, the second sealing ring piece is used for deforming in the process of sleeving the installation valve seat at the opening end of the first protection cylinder so as to realize the sealing of the connection position, the first protection cylinder is detachably connected with the installation valve seat, and the first limiting step is used for abutting against a spigot on the inner peripheral wall of the opening end of the first protection cylinder so as to limit the axial position of the installation valve seat in which the first protection cylinder is arranged.
Furthermore, the protection sleeve set comprises a first protection cylinder and a second protection cylinder which are oppositely arranged, and the first protection cylinder and the second protection cylinder are in a semi-closed hollow cylinder shape with an opening at one end and a closed end at the other end; a fourth external thread is processed on the excircle of the mounting valve seat, and fourth internal threads which are respectively matched with the fourth external thread on the excircle of the mounting valve seat are respectively arranged on the inner peripheral walls of the opening ends of the first protective cylinder and the second protective cylinder; or the excircle of the mounting valve seat is processed with a first annular groove and a second annular groove which are concave and annular, the first annular groove and the second annular groove are arranged at intervals along the axial direction, a second sealing ring piece is arranged in the first annular groove, a third sealing ring piece is arranged in the second annular groove, a first annular limiting step and a second annular limiting step are also arranged on the excircle of the mounting valve seat, the first annular limiting step and the second annular limiting step are arranged at intervals along the axial direction, and the first annular groove and the second annular groove are positioned between the first annular groove and the second annular groove; the second sealing ring piece is used for deforming in the process that the opening end of the first protection cylinder is sleeved into the mounting valve seat from the oil outlet end of the mounting valve seat so as to realize the sealing of a connecting position, the first protection cylinder is detachably connected with the mounting valve seat, and the first limiting step is used for abutting against a seam allowance on the inner peripheral wall of the opening end of the first protection cylinder so as to limit the axial position of the first protection cylinder, which is installed into the mounting valve seat; the third sealing ring piece is used for deforming in the process that the opening end of the second protective cylinder is sleeved into the mounting valve seat from the oil inlet end of the mounting valve seat to realize the sealing of the connecting position, the second protective cylinder is detachably connected with the mounting valve seat, and the second limiting step is used for abutting against a seam allowance on the inner peripheral wall of the opening end of the second protective cylinder to limit the axial position of the second protective cylinder in which the mounting valve seat is arranged.
According to another aspect of the invention, the transformer comprises a transformer oil taking port, and the transformer oil taking port is detachably connected with the transformer oil taking device.
The invention has the following beneficial effects:
when the mutual inductor oil taking device is adopted, an additional operation tool is not needed, and only force is applied to enable the oil taking joint group to act in the whole oil sampling process so as to push the oil taking thimble group to slide forwards and backwards, so that the mutual inductor oil taking device is simple and convenient to operate, and the difficulty of oil taking operation of an oil taking operator is greatly reduced; compared with the prior art that the oil is taken from the oil drain valve which is externally installed, the oil taking device of the mutual inductor comprises the protective sleeve group which is used for sealing and protecting the installation valve seat and the oil taking connector group, so that the problems of reduced working quality and difficult oil taking operation caused by common working conditions such as cold weather and oil on hands can be effectively avoided, meanwhile, the hidden danger caused by thread slipping is also effectively avoided, and by arranging the protective sleeve group, is used for external sealing when the oil taking device does not need to take samples, prevents dust, impurities and the like from entering the oil taking device or the transformer, and because the protective sleeve set can carry out sealing protection on the oil taking device, the sample oil in the transformer can be effectively prevented from being exposed, because the sample oil in the transformer is less, the problem that the transformer cannot work normally due to sample oil leakage can be avoided, the service life of the oil taking device can be prolonged, and the operation risk of the transformer is reduced; the oil taking thimble group gradually jacks the sealing ball under the action of thrust, so that the oil outlet channel is gradually communicated with the oil taking port of the transformer, and the amount of sample oil in the transformer is often small, so that the sample oil in the transformer can slowly enter the oil outlet channel and further slowly enter the oil containing appliance by controlling the sliding speed and the sliding process of the oil taking thimble group, and the situation that the sample oil in the transformer is insufficient due to the fact that the sample oil is excessively fast entering the oil containing appliance is avoided; the oil taking device of the mutual inductor has the advantages of small volume, simple structure, low manufacturing cost and reliable operation;
when the transformer oil extraction device is used for extracting oil, an additional operation tool is not needed, the operation is simple and convenient, and the oil extraction operation difficulty of an oil extraction operator can be greatly reduced; the device can effectively avoid the problems of reduced working quality and difficult oil taking operation caused by common working conditions such as cold weather and oil on hands, also effectively avoid the hidden danger caused by thread slipping, prevent dust, impurities and the like from entering an oil taking tool or a transformer, prevent sample oil in the transformer from being exposed, prolong the service life of the oil taking tool and reduce the operation risk of the transformer; and the situation that the sample oil enters the oil container too fast to cause the sample oil in the transformer to be insufficient can be avoided.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic sectional front view of a transformer oil-taking device according to a first embodiment of the present invention;
fig. 2 is a schematic sectional front view of an oil pumping device of a transformer according to a second embodiment of the present invention.
Description of the figures
10. An oil taking port of the transformer; 20. installing a valve seat; 201. an oil outlet channel; 202. a first step surface; 30. taking an oil thimble group; 301. a butting end; 302. a force-bearing end; 303. a first stop flange; 3030. an outer conical surface; 31. an oil taking thimble; 32. a tension spring; 40. taking an oil joint group; 41. an oil taking joint; 411. an extension section; 412. a limiting section; 413. an oil receiving nozzle; 414. a second position-defining flange; 42. an oil outlet joint; 43. a first seal ring member; 50. a sealing ball; 60. an oil container.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
Referring to fig. 1 and 2, a preferred embodiment of the present invention provides an oil extraction device for a transformer, including a mounting valve seat 20 detachably connected to an oil extraction port 10 of a transformer, an oil outlet channel 201 axially penetrating the mounting valve seat 20 is disposed in the mounting valve seat 20, an oil extraction thimble group 30 slidably disposed along an axial direction is disposed in the oil outlet channel 201, a propping end 301 of the oil extraction thimble group 30 extends from an oil inlet end of the oil outlet channel 201 and then extends toward a seal ball 50 for sealing the oil extraction port 10 of the transformer, and a stressed end 302 of the oil extraction thimble group 30 extends toward an oil outlet end of the oil outlet channel 201. The oil outlet end of the mounting valve seat 20 is detachably connected with an oil taking joint group 40 communicated with the oil outlet channel 201, the first end of the oil taking joint group 40 extends into the oil outlet channel 201 from the oil outlet end of the oil outlet channel 201 and then is connected with a stressed end 302 of the oil taking thimble group 30, the second end of the oil taking joint group 40 is an outward extending end which is located outside the mounting valve seat 20 and is detachable with an oil container 60 containing sample oil, and the outward extending end is also used for bearing external force to push the oil taking thimble group 30 to slide towards the direction close to the sealing ball 50, so that the abutting end 301 abuts against the sealing ball 50 to enable the oil outlet channel 201 to be communicated with the transformer oil taking port 10, or the oil taking thimble group 30 is pushed to slide towards the direction far away from the sealing ball 50 to enable the abutting end 301 to loosen the sealing ball 50 to enable the sealing ball 50 to reseal the transformer oil taking port 10 under the action of pressure. The oil taking device of the mutual inductor further comprises a protection sleeve set used for sealing and protecting the installation valve seat 20 and the oil taking connector set 40, and the protection sleeve set is sleeved outside the installation valve seat 20 and is detachably connected with the installation valve seat 20.
When the transformer oil taking device is used for extracting sample oil in a transformer, firstly, the protection sleeve set is taken down from the installation valve seat 20 to expose the installation valve seat 20 and the oil taking connector set 40, and then the installation valve seat 20 is fixedly connected with the transformer oil taking port 10; when oil sampling is performed, firstly, the oil container 60 is fixedly connected with the extending end of the oil taking connector group 40, then force is applied to enable the oil taking connector group 40 to act so as to push the oil taking thimble group 30 to slide towards the direction close to the sealing ball 50 along the oil outlet channel 201, in the sliding process of the oil taking thimble group 30, the abutting end 301 abuts against the sealing ball 50 and pushes the sealing ball 50 to be opened from the oil inlet end of the oil taking port 10 of the transformer in the continuous sliding process, the oil outlet channel 201 is communicated with the oil taking port 10 of the transformer, sample oil in the transformer enters the oil outlet channel 201 from the oil taking port 10 of the transformer, then enters the oil container 60 through the oil taking connector group 40, and then the extraction operation of the sample oil is completed; after the sample oil amount in the oil container 60 meets the requirement, applying force to make the oil taking joint group 40 act so as to make the oil taking thimble group 30 slide along the oil outlet channel 201 in the direction far away from the seal ball 50, wherein in the sliding process of the oil taking thimble group 30, the propping end 301 is separated from the seal ball 50, the seal ball 50 reseals the oil inlet end of the transformer oil taking port 10 under the pressure action, and the transformer oil taking port 10 is disconnected from the oil outlet channel 201; after the sample oil in the oil outlet channel 201 completely flows into the oil container 60, the oil container 60 is taken down from the oil taking connector group 40, and then the protection sleeve set is sleeved on the installation valve seat 20 again, or the installation valve seat 20 is firstly taken down from the transformer oil taking port 10 and then the protection sleeve set is sleeved on the installation valve seat 20 again, so that one time of oil sampling operation is completed.
When the mutual inductor oil taking device is adopted, no additional operation tool is needed, and only force is needed to be applied in the whole oil sampling process to enable the oil taking joint group 40 to act so as to push the oil taking thimble group 30 to slide forwards and backwards, so that the operation is simple and convenient, and the difficulty of oil taking operation of an oil taking operator is greatly reduced; compared with the prior art that the oil is taken from the oil drain valve which is externally installed, the oil taking device of the mutual inductor comprises the protective sleeve group which is used for sealing and protecting the installation valve seat 20 and the oil taking connector group 40, so that the problems of reduced working quality and difficult oil taking operation caused by common working conditions such as cold weather and oil on hands can be effectively avoided, meanwhile, the hidden danger caused by thread slipping is also effectively avoided, and by arranging the protective sleeve group, is used for external sealing when the oil taking device does not need to take samples, prevents dust, impurities and the like from entering the oil taking device or the transformer, and because the protective sleeve set can carry out sealing protection on the oil taking device, the sample oil in the transformer can be effectively prevented from being exposed, because the sample oil in the transformer is less, the problem that the transformer cannot work normally due to sample oil leakage can be avoided, the service life of the oil taking device can be prolonged, and the operation risk of the transformer is reduced; the oil taking thimble group 30 gradually jacks the sealing ball 50 under the action of thrust, so that the oil outlet channel 201 is gradually communicated with the oil taking port 10 of the transformer, and the amount of sample oil in the transformer is often small, so that the sample oil in the transformer can slowly enter the oil outlet channel 201 and further slowly enter the oil containing appliance 60 by controlling the sliding speed and the sliding process of the oil taking thimble group 30, and the situation that the sample oil in the transformer is insufficient due to the fact that the sample oil enters the oil containing appliance 60 at an excessively high speed is avoided; the oil taking device for the mutual inductor has the advantages of small volume, simple structure, low manufacturing cost and reliable operation.
Alternatively, as shown in fig. 1 and 2, the mounting valve seat 20 has a hollow cylindrical shape with both ends communicating, and the shaft hole of the mounting valve seat 20 forms an oil outlet passage 201. The outer peripheral wall of the oil inlet end of the installation valve seat 20 is provided with a first external thread, the inner peripheral wall of the transformer oil taking port 10 is provided with a first internal thread, and the oil inlet end of the installation valve seat 20 is inserted into the transformer oil taking port 10 and is connected with the first internal thread through the meshing of the first external thread and the first internal thread so that the installation valve seat 20 is detachably connected with the transformer. Preferably, as shown in fig. 1 and 2, an inner concave mounting groove is processed on an outer circle of an oil inlet end of the mounting valve seat 20, a sealing ring member is installed in the mounting groove, and the sealing ring member is used for sealing a gap between the oil inlet end of the mounting valve seat 20 and the transformer oil taking port 10 and preventing sample oil from leaking through the gap between the transformer oil taking port 10 and the mounting valve seat 20; or, a sealing gasket is arranged between the end face of the oil taking port 10 of the transformer and the first step face 202 of the mounting valve seat 20 to realize the sealing of the connecting part, and the flow of the control valve for opening and closing the oil taking thimble group 30 by pushing the sealing ball 50 can be adjusted by adjusting the thickness of the sealing gasket. Specifically, the seal ring member is a seal ring. The second internal thread is arranged on the inner peripheral wall of the oil outlet end of the mounting valve seat 20, the second external thread is arranged on the outer circle of the first end of the oil taking connector group 40, the first end stretches into the mounting valve seat 20 from the oil outlet end of the mounting valve seat 20, and then the second external thread is matched and connected with the second internal thread, so that the first end slides along the axial direction of the oil outlet channel 201 in the process of screwing the oil taking connector group 40, and then the oil taking thimble group 30 is pushed to slide. During operation, the depth of the first end of the oil taking joint group 40 extending into the oil outlet channel 201 can be adjusted by screwing the oil taking joint group 40, and further the sliding distance of the oil taking thimble group 30 is adjusted. In the structure of the invention, the mounting valve seat 20 is simply connected with the transformer oil taking port 10 and the oil taking connector group 40 is simply connected with the mounting valve seat 20, so that the oil taking tool is convenient to mount, dismount and clean.
Alternatively, as shown in fig. 1 and 2, the oil extraction needle group 30 includes an oil extraction needle 31 in a rod shape, and a retraction spring 32 for providing an elastic force for extending and retracting in the axial direction. The oil taking thimble 31 is installed in the oil outlet channel 201 in a sliding manner along the axial direction of the oil outlet channel 201, the abutting end 301 of the oil taking thimble 31 extends from the oil inlet end of the oil outlet channel 201 and then extends toward the seal ball 50, and the force bearing end 302 of the oil taking thimble 31 is inserted into the first end of the oil taking joint group 40 along the axial direction. The telescopic spring 32 is sleeved on the outer circle of the oil taking thimble 31, and two ends of the telescopic spring 32 respectively abut against the end faces of the oil taking thimble 31 and the first end of the oil taking joint group 40. In the oil extraction thimble group 30, the extension spring 32 is used for receiving the thrust applied by the oil extraction joint group 40 so as to push the oil extraction thimble 31 to slide along the axial direction. The elastic force of the expansion spring 32 should be smaller than the pressure applied to the sealing ball 50 by the sample oil, so that the sealing ball 50 can seal the oil taking port 10 of the transformer when the expansion spring 32 is not acted by the oil taking joint group 40.
Preferably, as shown in fig. 1 and fig. 2, an outer circle of the oil taking thimble 31 is provided with a first outward convex annular limiting flange 303, and the first limiting flange 303 is used for abutting against an end surface of the expansion spring 32 to limit the expansion spring 32 in the axial direction. The end surface of the first limiting flange 303 facing the abutting end 301 is an outer conical surface 3030, an inner conical surface is arranged on the inner peripheral wall of the oil outlet channel 201, the conical degrees of the inner conical surface and the outer conical surface 3030 are different, the inner conical surface and the outer conical surface 3030 cooperate to guide the flow of the sample oil in the oil outlet channel 201, so that interference of the first limiting flange 303 on the flow of the sample oil is prevented when the sample oil flows, and the cooperation of the inner conical surface and the outer conical surface 3030 is also used for adjusting the flow of the sample oil in the oil outlet channel 201. Further, the end surface of the abutting end 301 of the oil taking thimble 31 is provided with a concave and spherical limiting groove, and the limiting groove is used for matching with the spherical surface of the sealing ball 50, so that the oil taking thimble 31 abuts against the sealing ball 50 quickly and stably.
Optionally, in the first embodiment of the present invention, as shown in fig. 1, the oil taking joint group 40 includes an oil taking joint 41, the oil taking joint 41 is in a hollow cylinder shape with two ends communicated, and a shaft hole of the oil taking joint 41 is communicated with the oil outlet channel 201, a second external thread is machined on an outer circle of an extending section 411 of the oil taking joint 41 extending into the oil outlet channel 201, a force bearing end 302 of the oil taking thimble 31 extends into the shaft hole of the oil taking joint 41 along the axial direction, and the oil taking thimble group 30 can be pushed to slide along the axial direction by screwing the oil taking joint 41. The limiting section 412 of the oil taking connector 41 outside the installation valve seat 20 is communicated with a plurality of oil receiving nozzles 413, the sizes and the types of the plurality of oil receiving nozzles 413 are different, each oil receiving nozzle 413 is provided with a control valve for controlling the on-off of the corresponding oil receiving nozzle 413, and the peripheral wall of each oil receiving nozzle 413 is provided with a connecting structure detachably connected with an oil container 60 to be matched and connected. The plurality of oil receiving nozzles 413 are different in size and model, so that the oil taking device can be conveniently connected with the oil containers 60 of different sizes and models, and in other embodiments, the number of the oil receiving nozzles 413 can be one. The outer peripheral wall of each oil receiving nozzle 413 is provided with a connecting structure detachably connected with the oil container 60 to be matched and connected, and the connecting structure can be an external thread, an interference fit connection and the like. Preferably, the outer circle of the limiting section 412 of the oil extraction joint 41 is of a polygonal structure, so that an oil extraction operator can apply force to screw the oil extraction joint 41.
Alternatively, in a second embodiment of the present invention, as shown in fig. 2, the oil taking joint group 40 includes an oil taking joint 41 and an oil outlet joint 42. The oil taking connector 41 is in a hollow cylinder shape with two communicated ends, the shaft hole of the oil taking connector 41 is communicated with the oil outlet channel 201, the second external thread is processed on the excircle of the extending section 411 of the oil taking connector 41 extending into the oil outlet channel 201, the stress end 302 of the oil taking thimble 31 extends into the shaft hole of the oil taking connector 41 along the axial direction, and the oil taking thimble group 30 can be pushed to slide along the axial direction by screwing the oil taking connector 41. The oil outlet joint 42 is in an end cover shape, a third internal thread is processed on the inner peripheral wall of the oil outlet joint, a third external thread is processed on the outer peripheral wall of the oil outlet end of the installation valve seat 20, the oil outlet joint 42 is sleeved on the outer circle of the oil outlet end of the installation valve seat 20 through a limiting section 412 of the oil taking joint 41 located outside the installation valve seat 20, and the oil outlet joint is detachably connected with the installation valve seat 20 through the matching of the third internal thread and the third external thread. Preferably, as shown in fig. 2, the inner hole of the limiting section 412 of the oil taking joint 41 is a polygonal structure, so that a polygonal stick is inserted into the inner hole to assist the operator in rotating the oil taking joint 41; or the outer circle of the limiting section 412 of the oil taking joint 41 is provided with a concave hole, which is convenient for an operator to insert a round stick and other auxiliary rotating oil taking joints 41. When the oil is taken out, the oil container 60 is fixedly connected with the oil outlet joint 42, then the oil taking joint 41 is screwed until the oil taking joint 41 stops flowing sample oil, and at the moment, the oil outlet joint 42 connected with the oil container 60 is quickly screwed to the oil outlet end of the mounting valve seat 20. Preferably, a sealing ring member or a sealing gasket is arranged between the end face of the limiting section 412 of the oil taking joint 41 and the oil outlet joint 42 to seal a gap between the end face and the oil outlet joint 42, so as to prevent sample oil from leaking from the gap between the outer circle of the limiting section 412 and the inner hole of the oil outlet joint 42. The outer end face of the oil outlet joint 42 is communicated with a plurality of oil receiving nozzles 413, the size and the model of the oil receiving nozzles 413 are different, each oil receiving nozzle 413 is provided with a control valve for controlling the on-off of the corresponding oil receiving nozzle 413, and the peripheral wall of each oil receiving nozzle 413 is provided with a connecting structure detachably connected with an oil container 60 to be matched and connected. The plurality of oil receiving nozzles 413 are different in size and model, so that the oil taking device can be conveniently connected with the oil containers 60 of different sizes and models. The outer peripheral wall of each oil receiving nozzle 413 is provided with a connecting structure detachably connected with the oil container 60 to be matched and connected, and the connecting structure can be an external thread, an interference fit connection and the like. Preferably, the outer circle of the limiting section 412 of the oil extraction joint 41 is of a polygonal structure, so that an oil extraction operator can apply force to screw the oil extraction joint 41.
In the first and second embodiments of the present invention, as shown in fig. 1 and fig. 2, an end surface of the limiting section 412 of the oil taking connector 41 facing the extending section 411 is provided with a second limiting flange 414 which is convex and annular, and the second limiting flange 414 is used for abutting against an end surface of the oil outlet end of the mounting valve seat 20, so as to limit the depth of the extending section 411 of the oil taking connector 41 screwed into the oil outlet channel 201, and prevent the oil taking thimble 31 from over-sliding towards the sealing ball 50 to cause the "collision" between the inner conical surface and the outer conical surface, thereby disconnecting the oil outlet channel 201. Further, as shown in fig. 1 and fig. 2, the oil taking joint set 40 further includes a first sealing ring member 43 for sealing a gap between the oil taking joint 41 and the oil outlet passage 201, and the first sealing ring member 43 is installed on the outer circle of the protruding section 411 and located between the outer circle of the protruding section 411 and the installation valve seat 20. Specifically, the first seal ring member 43 is a butyronitrile seal ring, which is not easy to wear and has a good sealing effect.
Optionally, as not shown, in a third embodiment of the oil extraction device of the mutual inductor according to the present invention, the oil extraction device of the present invention is directly connected to the oil extraction port 10 of the transformer, and the protection kit includes a first protection cylinder, and the first protection cylinder is a semi-closed hollow cylinder with an open end and a closed end. And a fourth external thread is processed on the excircle of the mounting valve seat 20, and a fourth internal thread matched with the fourth external thread on the excircle of the mounting valve seat 20 is arranged on the inner peripheral wall of the opening end of the first protective cylinder. Or the excircle of the installation valve seat 20 is processed with a first annular groove which is concave and annular, a second sealing ring part is arranged in the first annular groove, a first annular limiting step is further arranged on the excircle of the installation valve seat 20, the second sealing ring part is used for deforming in the process of sleeving the installation valve seat 20 at the opening end of the first protection cylinder to realize the sealing of the connection position, the first protection cylinder is detachably connected with the installation valve seat 20, and the first limiting step is used for abutting against a seam allowance on the inner peripheral wall of the opening end of the first protection cylinder to limit the axial position of the first protection cylinder in the installation valve seat 20. Specifically, the second seal ring piece is the butyronitrile sealing washer, because first protective barrel passes through the deformation of second seal ring piece and then the chucking on the excircle of installation disk seat 20, and first protective barrel adorns and rubs with the second seal ring piece when installing disk seat 20, when second seal ring piece adopted the butyronitrile sealing washer, the butyronitrile sealing washer was difficult for wearing and tearing, and then avoided influencing the assembly effect of first protective barrel, and the deflection is big so that first protective barrel is packed into.
In a fourth embodiment of the transformer oil taking device, not shown, after the sample oil is taken by the transformer oil taking port 10, the transformer oil taking device is taken down for storage. The protection suit includes relative first protection section of thick bamboo and the second protection section of thick bamboo that sets up, and first protection section of thick bamboo and second protection section of thick bamboo all are one end opening, the semi-closed hollow tube-shape of one end confined. And fourth external threads are processed on the excircle of the mounting valve seat 20, and fourth internal threads respectively matched with the fourth external threads on the excircle of the mounting valve seat 20 are respectively arranged on the inner peripheral walls of the open ends of the first protective cylinder and the second protective cylinder. Or
The excircle of the mounting valve seat 20 is provided with a first annular groove and a second annular groove which are concave and annular, the first annular groove and the second annular groove are arranged at intervals along the axial direction, a second sealing ring piece is arranged in the first annular groove, a third sealing ring piece is arranged in the second annular groove, a first limiting step and a second limiting step which are annular are further arranged on the excircle of the mounting valve seat 20, the first limiting step and the second limiting step are arranged at intervals along the axial direction, and the first limiting step and the second limiting step are positioned between the first annular groove and the second annular groove. The second sealing ring piece is used for deforming in the process that the opening end of the first protection cylinder is sleeved into the installation valve seat 20 from the oil outlet end of the installation valve seat 20 to realize the sealing of the connection position, the first protection cylinder is detachably connected with the installation valve seat 20, and the first limiting step is used for abutting against a spigot on the inner peripheral wall of the opening end of the first protection cylinder to limit the axial position of the first protection cylinder in which the installation valve seat 20 is installed. The third seal ring piece is used for deforming in the process that the opening end of the second protective cylinder is sleeved into the installation valve seat 20 from the oil inlet end of the installation valve seat 20 to realize the sealing of the connection position, the second protective cylinder is detachably connected with the installation valve seat 20, and the second limit step is used for abutting against a spigot on the inner peripheral wall of the opening end of the second protective cylinder to limit the axial position of the second protective cylinder in the installation valve seat 20. Specifically, the second sealing ring piece is a butyronitrile sealing ring, the first protective cylinder is clamped on the outer circle of the mounting valve seat 20 through the deformation of the second sealing ring piece, and the first protective cylinder is in friction with the second sealing ring piece when being mounted in the mounting valve seat 20, when the second sealing ring piece is the butyronitrile sealing ring, the butyronitrile sealing ring is not easy to wear, so that the assembly effect of the first protective cylinder is prevented from being influenced, and the deformation is large so that the first protective cylinder can be mounted; similarly, the third seal ring member is also a butyronitrile seal ring, and the function and effect of the third seal ring member are the same as those of the second seal ring member, so that the description is not repeated.
Referring to fig. 1 and 2, a transformer according to a preferred embodiment of the present invention further includes a transformer oil taking port 10, and the transformer oil taking port 10 is detachably connected to a transformer oil taking device as described above. Because the inner hole of the transformer oil taking port 10 is detachably connected with the mutual inductor oil taking device, the transformer oil taking device does not need to use an additional operating tool when taking oil, is simple and convenient to operate, and can greatly reduce the difficulty of oil taking operation of oil taking operators; the device can effectively avoid the problems of reduced working quality and difficult oil taking operation caused by common working conditions such as cold weather and oil on hands, also effectively avoid the hidden danger caused by thread slipping, prevent dust, impurities and the like from entering an oil taking tool or a transformer, prevent sample oil in the transformer from being exposed, prolong the service life of the oil taking tool and reduce the operation risk of the transformer; and the situation that the sample oil enters the oil container 60 at an excessively high speed so that the sample oil in the transformer is insufficient can be avoided.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An oil taking device of a mutual inductor is characterized in that,
the oil taking device comprises a mounting valve seat (20) detachably connected with an oil taking port (10) of a transformer, wherein an oil outlet channel (201) which axially penetrates through the mounting valve seat (20) is arranged in the mounting valve seat (20), an oil taking thimble group (30) which is axially arranged in a sliding manner is arranged in the oil outlet channel (201), a propping end (301) of the oil taking thimble group (30) extends from an oil inlet end of the oil outlet channel (201) and then extends towards a sealing ball (50) for sealing the oil taking port (10) of the transformer, and a stress end (302) of the oil taking thimble group (30) extends towards an oil outlet end of the oil outlet channel (201);
the oil outlet end of the mounting valve seat (20) is detachably connected with an oil taking joint group (40) communicated with the oil outlet channel (201), the first end of the oil taking joint group (40) extends into the oil outlet channel (201) from the oil outlet end of the oil outlet channel (201) and then is connected with a stress end (302) of the oil taking thimble group (30), the second end of the oil taking joint group (40) is an outward extending end which is positioned outside the mounting valve seat (20) and is detachably connected with an oil container (60) containing sample oil, and the outward extending end is also used for bearing external force to push the oil taking thimble group (30) to slide towards the direction close to the sealing ball (50) so that the top end is abutted against (301) to jack the sealing ball (50) and further to enable the oil outlet channel (201) to be communicated with the transformer oil taking port (10) or push the oil taking thimble group (30) to slide towards the direction far away from the sealing ball (50), so that the abutting end (301) loosens the sealing ball (50) and the sealing ball (50) reseals the transformer oil taking port (10) under the action of pressure;
the oil taking device of the mutual inductor further comprises a protection sleeve set used for sealing and protecting the installation valve seat (20) and the oil taking connector set (40), and the protection sleeve set is sleeved outside the installation valve seat (20) and detachably connected with the installation valve seat (20).
2. The transformer oil extraction device of claim 1,
the mounting valve seat (20) is in a hollow cylinder shape with two communicated ends, and a shaft hole of the mounting valve seat (20) forms the oil outlet channel (201);
the outer peripheral wall of the oil inlet end of the mounting valve seat (20) is provided with a first external thread, the inner peripheral wall of the transformer oil taking port (10) is provided with a first internal thread, and the oil inlet end of the mounting valve seat (20) is inserted into the transformer oil taking port (10) and is in meshed connection with the first internal thread through the first external thread so as to enable the mounting valve seat (20) to be detachably connected with the transformer;
the internal perisporium that installation disk seat (20) were gone out oil and are equipped with the second internal thread on the end, get to be equipped with the second external thread on the excircle of oily joint group (40) first end, first end by the end that goes out oil of installation disk seat (20) stretches into it the second external thread on it with second internal thread cooperation is connected after installation disk seat (20), moves with twisting get the in-process of oily joint group (40) and make first end is followed the axial of going out oil passageway (201) slides and then promotes it slides to get oily thimble group (30).
3. The transformer oil extraction device of claim 2,
the oil extraction thimble group (30) comprises a rod-shaped oil extraction thimble (31) and a telescopic spring (32) for providing elastic force for stretching along the axial direction;
the oil taking thimble (31) is arranged in the oil outlet channel (201) in a sliding manner along the axial direction of the oil outlet channel (201), a propping end (301) of the oil taking thimble (31) extends out of the oil inlet end of the oil outlet channel (201) and then extends towards the sealing ball (50), and a stress end (302) of the oil taking thimble (31) is inserted into the first end of the oil taking joint group (40) along the axial direction;
the telescopic spring (32) is sleeved on the excircle of the oil taking thimble (31), and two ends of the telescopic spring (32) are respectively abutted against the end faces of the oil taking thimble (31) and the first end of the oil taking joint group (40).
4. The transformer oil extraction device of claim 3,
a first outward-convex annular limiting flange (303) is arranged on the outer circle of the oil taking thimble (31), and the first limiting flange (303) is used for abutting against the end face of the expansion spring so as to limit the expansion spring along the axial direction;
the end face, facing the abutting end (301), of the first limiting flange (303) is an outer conical surface (3030), an inner conical surface is arranged on the inner peripheral wall of the oil outlet channel (201), the inner conical surface and the outer conical surface (3030) have different tapers, and the inner conical surface and the outer conical surface (3030) guide the flow of the sample oil in the oil outlet channel (201) under the matching action and are used for adjusting the flow of the sample oil in the oil outlet channel (201).
5. The transformer oil extraction device of claim 3,
the oil taking joint group (40) comprises an oil taking joint (41), the oil taking joint (41) is in a hollow cylinder shape with two communicated ends, a shaft hole of the oil taking joint (41) is communicated with the oil outlet channel (201), the second external thread is machined on the excircle of the extending section (411) of the oil outlet channel (201) into which the oil taking joint (41) extends, and the stress end (302) of the oil taking thimble (31) extends into the shaft hole of the oil taking joint (41) along the axial direction;
the limiting section (412) of the oil taking connector (41) located outside the mounting valve seat (20) is communicated with a plurality of oil receiving nozzles (413), the size and the model of the plurality of oil receiving nozzles (413) are different, each oil receiving nozzle (413) is provided with a control valve used for controlling the on-off of the corresponding oil receiving nozzle (413), and the peripheral wall of each oil receiving nozzle (413) is provided with a connecting structure detachably connected with the oil container (60) to be matched and connected.
6. The transformer oil extraction device of claim 3,
the oil taking joint group (40) comprises an oil taking joint (41) and an oil outlet joint (42);
the oil taking joint (41) is in a hollow cylinder shape with two communicated ends, the shaft hole of the oil taking joint (41) is communicated with the oil outlet channel (201), the second external thread is processed on the excircle of the extending section (411) of the oil outlet channel (201) into which the oil taking joint (41) extends, and the stress end (302) of the oil taking thimble (31) extends into the shaft hole of the oil taking joint (41) along the axial direction;
the oil outlet connector (42) is in an end cover shape, a third internal thread is processed on the inner peripheral wall of the oil outlet connector, a third external thread is processed on the outer peripheral wall of the oil outlet end of the mounting valve seat (20), the oil outlet connector (42) is sleeved on the outer circle of the oil outlet end of the mounting valve seat (20) through a limiting section (412) of the oil taking connector (41) located outside the mounting valve seat (20), and is detachably connected with the mounting valve seat (20) through the matching of the third internal thread and the third external thread;
the outer end face of the oil outlet connector (42) is communicated with a plurality of oil receiving nozzles (413), the sizes and the types of the oil receiving nozzles (413) are different, each oil receiving nozzle (413) is provided with a control valve used for controlling the on-off of the corresponding oil receiving nozzle (413), and the outer peripheral wall of each oil receiving nozzle (413) is provided with a connecting structure detachably connected with the oil container (60) to be matched and connected.
7. The mutual inductor oil pumping device according to any one of claims 5 or 6,
the end face, facing the extending section (411), of the limiting section (412) of the oil taking joint (41) is provided with a second limiting flange (414) which is convex and annular, and the second limiting flange (414) is used for abutting against the end face of the oil outlet end of the mounting valve seat (20) so as to limit the depth of the extending section (411) of the oil taking joint (41) screwed into the oil outlet channel (201);
the oil extraction joint group (40) further comprises a first sealing ring piece (43) used for sealing a gap between the oil extraction joint (41) and the oil outlet channel (201), and the first sealing ring piece (43) is arranged on the outer circle of the extending section (411) and is positioned between the outer circle of the extending section (411) and the mounting valve seat (20).
8. The transformer oil extraction device of claim 1,
the protective sleeve set comprises a first protective cylinder, and the first protective cylinder is in a semi-closed hollow cylinder shape with an opening at one end and a closed end;
a fourth external thread is machined on the excircle of the mounting valve seat (20), and a fourth internal thread matched with the fourth external thread on the excircle of the mounting valve seat (20) is arranged on the inner peripheral wall of the opening end of the first protective cylinder; or
The outer circle of the installation valve seat (20) is provided with a first annular groove which is concave and annular, a second sealing ring is arranged in the first annular groove, a first annular limiting step is further arranged on the outer circle of the installation valve seat (20), the second sealing ring is used for deforming in the process that the open end of the first protection cylinder is sleeved into the installation valve seat (20) to realize sealing of a connection position, the first protection cylinder is detachably connected with the installation valve seat (20), and the first limiting step is used for abutting against a seam allowance on the inner peripheral wall of the open end of the first protection cylinder to limit the axial position of the first protection cylinder, which is arranged in the installation valve seat (20).
9. The transformer oil extraction device of claim 1,
the protection sleeve set comprises a first protection cylinder and a second protection cylinder which are oppositely arranged, and the first protection cylinder and the second protection cylinder are in a semi-closed hollow cylinder shape with an opening at one end and a closed end;
fourth external threads are machined on the outer circle of the mounting valve seat (20), and fourth internal threads which are matched with the fourth external threads on the outer circle of the mounting valve seat (20) are respectively arranged on the inner peripheral walls of the opening ends of the first protective cylinder and the second protective cylinder; or
The outer circle of the installation valve seat (20) is provided with a first annular groove and a second annular groove which are concave and annular, the first annular groove and the second annular groove are arranged at intervals along the axial direction, a second sealing ring piece is arranged in the first annular groove, a third sealing ring piece is arranged in the second annular groove, a first limiting step and a second limiting step which are annular are further arranged on the outer circle of the installation valve seat (20), the first limiting step and the second limiting step are arranged at intervals along the axial direction, and the first limiting step and the second limiting step are positioned between the first annular groove and the second annular groove;
the second sealing ring piece is used for deforming in the process that the open end of the first protective cylinder is sleeved into the mounting valve seat (20) from the oil outlet end of the mounting valve seat (20) to realize sealing of a connecting position, the first protective cylinder is detachably connected with the mounting valve seat (20), and the first limiting step is used for abutting against a seam allowance on the inner peripheral wall of the open end of the first protective cylinder to limit the axial position of the first protective cylinder installed into the mounting valve seat (20);
the third sealing ring piece is used for deforming in the process that the opening end of the second protective cylinder is sleeved into the mounting valve seat (20) from the oil inlet end of the mounting valve seat (20) to realize sealing of a connection position, the second protective cylinder is detachably connected with the mounting valve seat (20), and the second limiting step is used for abutting against a seam allowance on the inner peripheral wall of the opening end of the second protective cylinder to limit the axial position of the second protective cylinder installed into the mounting valve seat (20).
10. A transformer, characterized by comprising a transformer oil taking port (10), wherein the transformer oil taking port (10) is detachably connected with the transformer oil taking device as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910905220.1A CN110608919B (en) | 2019-09-24 | 2019-09-24 | Oil extracting device for mutual inductor |
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| CN201910905220.1A CN110608919B (en) | 2019-09-24 | 2019-09-24 | Oil extracting device for mutual inductor |
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| Publication number | Publication date |
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| CN110608919B (en) | 2024-01-30 |
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