CN111982598B - Transformer tap switch oil chamber sampling device and sampling method - Google Patents
Transformer tap switch oil chamber sampling device and sampling method Download PDFInfo
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- CN111982598B CN111982598B CN202010866302.2A CN202010866302A CN111982598B CN 111982598 B CN111982598 B CN 111982598B CN 202010866302 A CN202010866302 A CN 202010866302A CN 111982598 B CN111982598 B CN 111982598B
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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
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
Abstract
The invention discloses a sampling device and a sampling method for an oil chamber of a transformer tap switch, wherein the sampling device comprises a valve body arranged at an oil taking port of a transformer, the outlet of the valve body is connected with a first oil taking pipe, the first transparent oil taking pipe is connected with a three-way valve, the first outlet of the three-way valve is communicated with an oil container through the oil taking pipe, and the second oil outlet of the three-way valve is detachably connected with a negative-pressure oil taking device. According to the method, the waste liquid bottle, the sampler and the sampling device are communicated through the sampling device, and the oil sample in the transformer is extracted through negative pressure.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a sampling device and a sampling method for an oil chamber of a tap switch of a transformer.
Background
With the improvement of voltage grade, the requirements on technical indexes of the transformer in all aspects of installation, operation and maintenance are gradually improved, and the quality of transformer oil influences whether the transformer can normally operate or not, and even endangers the safe and stable operation of the transformer. Therefore, in the process of transformer installation and operation and maintenance, the monitoring of the quality of transformer oil is particularly important, the sampling and inspection of the transformer oil are required in the oil treatment process of the large-scale transformer after the arrival of new oil, the residual oil treatment and the circulation of hot oil, the oil treatment process, the handover and the maintenance, and the main items of inspection include: electrical strength, moisture content, dielectric loss tangent, and particle size.
The current sampling mode is for opening the valve, place the sampling bottle and take a sample at the oil-out of getting the oil valve, and this kind of sampling mode leads to the leakage and the waste of oil easily to the sampling process is not isolated air, leads to easily that the oil sampling in-process takes place the deviation and leads to the oil test unqualified, will greatly increase engineering construction, equipment fortune dimension cost, delays the normal progress of engineering, reduces the engineering quality, thereby influences the time limit for a project, influences equipment normal operating even.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a sampling device and a sampling method for an oil chamber of a tap switch of a transformer.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a transformer tapping switch grease chamber sampling device which structural feature is characterized in that, is including installing the valve body of getting the hydraulic fluid port at the transformer, the exit linkage of valve body has first oil pipe of getting, first transparent oil pipe of getting is connected with the three-way valve, the first export of three-way valve is through getting oil pipe and flourishing oil container intercommunication, the second oil-out of three-way valve can be dismantled and be connected with the negative pressure and get the oil ware.
Preferably, the valve body comprises an upper valve body and a lower valve body, the upper valve body is longitudinally provided with a through first channel, the upper end of the upper valve body is provided with a connecting part which is in sealing connection with an oil taking port of the transformer, the lower end of the upper valve body is provided with a sealing mechanism for sealing the channel port at an oil outlet of the first channel, the lower valve body is provided with a longitudinally penetrating second channel, the upper part of the lower valve body is provided with a sleeving part which is sleeved at the bottom of the upper valve body, the lower valve body is internally provided with a triggering part for triggering the sealing mechanism to be opened, and after the lower valve body is sleeved on the upper valve body, the triggering part opens the sealing mechanism so as to penetrate the first channel and the second channel.
Preferably, the transformer oil taking port is provided with an upper flange, the top end of the valve body is provided with a lower flange, the upper flange and the lower flange are detachably connected in a sealing manner, and a filter screen is clamped between the upper flange and the lower flange.
Preferably, the periphery of the lower flange is further provided with a threaded connection part, a protective cover detachable from the threaded connection part is arranged, and when the lower valve body is not installed in a matched mode on the upper valve body, the dust cover is detachably connected with the threaded connection part of the lower flange.
Preferably, the sealing mechanism comprises a conical plug, the conical plug penetrates through the oil outlet, a sealing plate is connected to the top of the conical plug, and the sealing plate is connected with the inner cavity wall of the upper valve body through an elastic connecting piece and used for the conical plug to reciprocate in the oil outlet so as to seal and open the oil outlet through the sealing mechanism.
Preferably, the conical plug sequentially comprises a large cylindrical part, a conical part and a small cylindrical part from top to bottom, the large cylindrical part is in clearance sealing fit with the oil outlet, and the small cylindrical part is used for being matched with the lower valve body triggering part.
Preferably, the conical plug consists, from the inside outwards, of a rigid support and an elastic seal; the rigid supporting piece forms a framework of the conical plug and is connected with the sealing plate, and the elastic sealing piece wraps the periphery of the supporting piece.
Preferably, the sealing plate is further provided with a sealing groove, and a sealing gasket is arranged in the sealing groove.
Preferably, a sliding sleeve is arranged outside the sleeving part of the lower valve body, the bottom end of the sliding sleeve is connected with the lower valve body connecting part through a return elastic part so as to realize that the sliding sleeve slides up and down along the sleeving part, a limiting cavity is radially arranged on the connecting part, a return spring is arranged in the limiting cavity, a limiting column is arranged, the limiting column penetrates through the return spring, one end of the limiting column extends into the second channel, and the return spring is used for stretching of the limiting column; and the periphery of the upper valve body is provided with a positioning groove clamped with the limiting column.
Preferably, the inner wall of the sliding sleeve is an inclined surface from top to bottom, and when the inclined surface is used for enabling the sliding sleeve to slide upwards, a return space is provided for the limiting column, so that the end part of the limiting column returns to the limiting cavity.
Preferably, the trigger part comprises a porous plate arranged in the second channel, a trigger column is arranged on the porous plate in a protruding mode, and the trigger column is used for triggering the sealing mechanism.
Preferably, a sealing ring is further arranged in the connecting part of the upper valve body.
Preferably, the lower end of the lower valve body is provided with a threaded connection part for connecting an oil taking pipeline.
The invention also provides a sampling method for the oil chamber of the tap switch of the transformer, which comprises the following steps of:
s1, communicating an oil taking pipeline with a three-way valve through an outlet of a lower valve body of an adapter;
s2, communicating a first outlet of the three-way valve with a waste oil bottle through an oil taking pipeline; the second outlet is communicated with a negative pressure type oil extractor, wherein the three-way valve is in a closed state, and an oil cavity of the negative pressure type oil extractor is in a vacuum pumping state;
s3, taking down a protective cover of the oil taking port of the transformer, holding the sliding sleeve of the lower valve body, aligning the top end of the lower valve body to the lower end of the upper valve body, pushing the lower valve body upwards, enabling the sliding sleeve to move upwards relative to the lower valve body under the action of stress, enabling the sliding sleeve to be positioned at a limiting column, enabling the limiting column to return to the limiting cavity under the action of elastic restoring force, pushing the lower valve body into the valve cavity of the upper valve body, keeping the position of the lower valve body after the lower valve body is positioned in place, loosening the sliding sleeve, resetting the sliding sleeve, enabling the limiting column to stretch out of the limiting cavity and be clamped in the positioning groove under the pushing force of the sliding sleeve, and meanwhile, opening the sealing mechanism by a triggering part to enable the valve body to be in an opening state;
s4, opening a first outlet of the three-way valve, and enabling the transformer oil to flow into a waste oil bottle after passing through the valve body and the pipeline; after the first outlet is opened for a period of time, closing the first outlet;
s4, opening a second outlet of the three-way valve, sucking oil of the transformer into a negative pressure cavity of the negative pressure type oil extractor under negative pressure, closing the second outlet after the cavity is filled with the oil, taking down the negative pressure type oil extractor, sealing an oil inlet, and storing for later measurement;
s5, the lower valve body is held by a hand, the sliding sleeve is pushed upwards, the limiting column retracts into the limiting cavity, and the lower valve body is taken down from the upper valve body;
s6, continuously keeping the height of the lower valve body, opening the first outlet of the three-way valve again, discharging oil remained in the pipeline of the sampling device into a waste liquid bottle, and finishing sampling.
The waste liquid bottle is a negative-pressure vacuum cavity, and a first outlet of the three-way valve is connected with the waste liquid bottle in a sealing mode.
Compared with the prior art, the invention has the beneficial effects that:
the oil taking device and the oil taking port of the transformer are provided with the oil taking valve structure capable of being quickly inserted and pulled, and the upper valve body and the lower valve body are arranged, so that the upper valve body can be directly arranged on the oil taking port of the transformer, sealing can be formed on one hand, and on the other hand, when oil taking detection is needed, oil taking operation can be realized only by inserting the lower valve body, and the oil taking device and the oil taking port of the transformer are simple and convenient.
The device can realize no pollution and no air contact of oil taken by the negative pressure oil extractor through the pipeline design of the oil taking pipeline, thereby ensuring the quality of the detected oil product.
The valve body and the port of the invention are connected through the flange, the installation is convenient, and a filter screen structure is added between the flanges and is used for filtering impurities in the transformer oil and preventing the valve body from being blocked.
The upper valve body of the valve body is fixedly arranged on the oil taking port of the transformer, and the risk of field dust pollution, hard object impact and misoperation is high; therefore, the protective cover is arranged, so that the upper valve body can be effectively protected when not used, and can be conveniently opened when used.
The invention can sample in various working environments and seasonal environments, has short sampling time, can not generate the condition of transformer oil leakage and waste, and samples in a state of sealing and isolating air, thereby greatly improving the oil sampling qualification rate; meanwhile, the operation of testing personnel is simple, the labor cost is reduced, and the oil sampling efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of an insulating oil sampling device for a transformer according to the present invention;
fig. 2 is an exploded view of an insulating oil sampling device for a transformer according to the present invention.
Fig. 3 is a schematic structural diagram of the valve body of the present invention.
FIG. 4 is an enlarged view of the structure at A in FIG. 3;
fig. 5 is an enlarged view of the structure at B in fig. 3.
Fig. 6 is a flow chart of the method of the present invention.
In the figure: 1. a connecting portion; 2. a filter screen; 3. an upper valve body; 4. positioning a groove; 5. a sliding sleeve; 6. a seal ring; 7. a trigger section; 8. a lower valve body; 9. a threaded connection; 10. a sealing plate; 11. a groove; 12. a conical plug; 13. a return elastic member; 14. an oil outlet; 15. an elastic connecting member; 16. a limiting column; 17. a return spring; 18 a stop plate; 19. a limiting cavity; 20. an upper flange; 21. a lower flange; 23. an external thread connecting part; 24. A dust cover; 25. an adapter; 26. an oil outlet pipe, 27 and a three-way valve; 28. negative pressure sampler 29, sealing gasket, 30 second screw thread connecting part.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 4-5, the transformer insulating oil sampling device comprises an upper flange 20, a lower flange 21, a filter screen 2, an upper valve body 3, a lower valve body 8, a dust cover 24, an adapter 25, an oil outlet pipe 26, a three-way valve 27 and a negative pressure sampler 28.
The upper flange 20 is fixedly arranged at an oil taking port of the transformer, the lower flange 21 is arranged at the top of the upper valve body, the upper flange and the lower flange are detachably connected in a sealing manner, and a filter screen 2 and a sealing gasket 29 are clamped between the upper flange and the lower flange.
Wherein, the periphery of lower flange still is equipped with external screw thread connecting portion 23, sets up and threaded connection detachable dust cover 24, works as lower valve body 8 is not the cooperation install when going up on the valve body, dust cover 24 can be dismantled with the threaded connection portion of lower flange 21 and be connected. The lower flange is further provided with a second threaded connection 30 in the external threaded connection 23 for sealingly connecting the upper valve body 3.
The negative pressure sampler is similar to an injector and is provided with an oil inlet, a containing cavity with capacity scales and a plunger, the oil inlet is detachably connected with a second oil outlet of the three-way valve in a sealing mode, the plunger is pulled to suck oil into the containing cavity, the negative pressure sampler can also be a vacuumizing device, the oil inlet is provided with a sealing plug, the oil inlet is inserted into the sealing plug through a needle head during specific use, and the other end of the needle head is provided with a connecting part which can be connected with an outlet of the three-way valve in a sealing mode, such as a threaded connecting part.
The valve body comprises an upper valve body 3 and a lower valve body 8, a through first channel is longitudinally arranged on the upper valve body 3, a connecting part 1 which is in sealing connection with a transformer oil taking port is arranged at the upper end of the upper valve body 3, and a sealing mechanism for sealing the channel port is arranged at an oil outlet 14 of the first channel at the lower end of the upper valve body 3;
the lower valve body 8 is provided with a second channel which penetrates through the lower valve body in the longitudinal direction, the upper portion of the lower valve body 8 is provided with a sleeving part which is used for sleeving the bottom of the upper valve body, a triggering part 7 which triggers the opening of the sealing mechanism is arranged in the lower valve body, and after the lower valve body 8 is sleeved on the upper valve body 3, the sealing mechanism is opened by the triggering part 7 so as to penetrate through the first channel and the second channel.
The sealing mechanism comprises a conical plug 12, the conical plug 12 penetrates through an oil outlet 14, a sealing plate 10 is connected to the top of the conical plug 12, and the sealing plate 10 is connected with the inner cavity wall of the upper valve body through an elastic connecting piece 15 and used for the conical plug 12 to reciprocate in the oil outlet 14, so that the sealing mechanism can seal and open the oil outlet 14.
Further, the conical plug 12 sequentially comprises a large cylindrical part, a conical part and a small cylindrical part from top to bottom, the large cylindrical part is in clearance sealing fit with the oil outlet 14, and the small cylindrical part is used for being matched with the triggering part 7 of the lower valve body 8.
Further, the conical plug 12 consists, from the inside outwards, of a rigid support and an elastic seal; the rigid support member forms a framework of the conical plug 12 and is connected with the sealing plate 10, and the elastic sealing member is wrapped on the periphery of the support member.
Further, the sealing plate 10 is further provided with a sealing groove 11, and a sealing gasket is arranged in the sealing groove 11.
As shown in the figure, a sliding sleeve 5 is arranged outside the sleeving part of the lower valve body, the bottom end of the sliding sleeve 5 is connected with the connecting part of the lower valve body through a return elastic part 13 so as to realize that the sliding sleeve 5 slides up and down along the sleeving part, the connecting part is radially provided with a limiting cavity 19, a reset spring 17 is arranged in the limiting cavity 19, a limiting column 16 is arranged, the limiting column 16 penetrates through the reset spring 17, one end of the limiting column extends into the second channel, and the reset spring 17 is used for extending and retracting the limiting column 16; and the periphery of the upper valve body is provided with a positioning groove 4 clamped with a limiting column 16.
Wherein, be equipped with backstop plate 18 in the spacing chamber 19, reset spring 17 is by the centre gripping between backstop plate 18 and spacing intracavity export, and reset spring 17's bottom is fixed on spacing post, and the one end that first passageway was kept away from to spacing post supports and leans on the inner wall of sliding sleeve 5. When the sliding sleeve slides, the limit column 16 is driven by the return spring 17 to extend out or return into the limit cavity 19.
Further, the inner wall of the sliding sleeve 5 is an inclined plane from top to bottom, and the inclined plane is used for providing a return space for the limiting column when the sliding sleeve 5 slides upwards so as to enable the end part of the limiting column to return to the limiting cavity 19.
Trigger portion 7 establishes the perforated plate in the second passageway, the protrusion is equipped with the trigger post on the perforated plate, the trigger post is used for triggering sealing mechanism.
Further, a filter screen 2 is arranged in the connecting part 1 of the upper valve body; the lower extreme of lower valve body is equipped with threaded connection portion 9 and is used for connecting the pipeline of getting oil, still is equipped with sealing washer 6 at upper and lower valve body cooperation department.
When the valve body is used, the connecting part 1 of the upper valve body 3 is connected with an oil taking port of an original oil taking valve in advance in a threaded manner, when oil is taken each time, the lower valve body 8 is only needed to be carried and inserted into the upper valve body 3, the sliding sleeve 5 is pushed upwards, the inner side end of the limiting column 16 is propped back into the limiting cavity 19 under the elastic action of the reset spring 17, the lower valve body 8 can be inserted at the moment, then the sliding sleeve 5 is loosened, the lower valve body is reset under the elastic action of the return elastic piece 13, the inner side end of the limiting column 16 is propped into the limiting groove 4 to complete installation, the trigger part 7 is propped against the conical plug 12 to move at the moment, the sealing plate 10 moves along with the limiting cavity, the oil outlet 14 is opened, the threaded connecting part 9 is in threaded connection with the oil taking pipe, oil taking can be realized, the oil taking is relatively sealed, the waste of an oil sample is avoided, the lower valve body 8 is pulled out after the oil taking, the conical plug 12 is reset under the elastic action of the elastic connecting piece 15, and the sealing plate 10 and the sealing gasket 11 is sealed.
The invention further provides a sampling method for an oil chamber of a tap changer of a transformer, which comprises the following steps of:
s1, communicating an oil taking pipeline with a three-way valve through an outlet of a lower valve body of an adapter;
s2, communicating a first outlet of the three-way valve with a waste oil bottle through an oil taking pipeline; the second outlet is communicated with the negative pressure type oil extractor, wherein the three-way valve is in a closed state, and an oil cavity of the negative pressure type oil extractor is in a vacuum pumping state;
s3, taking down a protective cover of the oil taking port of the transformer, holding the sliding sleeve of the lower valve body, aligning the top end of the lower valve body to the lower end of the upper valve body, pushing the lower valve body upwards, enabling the sliding sleeve to move upwards relative to the lower valve body under the action of stress, enabling the sliding sleeve to be positioned at a limiting column, enabling the limiting column to return to the limiting cavity under the action of elastic restoring force, pushing the lower valve body into the valve cavity of the upper valve body, keeping the position of the lower valve body after the lower valve body is positioned in place, loosening the sliding sleeve, resetting the sliding sleeve, enabling the limiting column to stretch out of the limiting cavity and be clamped in the positioning groove under the pushing force of the sliding sleeve, and meanwhile, opening the sealing mechanism by a triggering part to enable the valve body to be in an opening state;
s4, opening a first outlet of the three-way valve, and enabling the transformer oil to flow into a waste oil bottle after passing through the valve body and the pipeline; closing the first outlet after the first outlet is opened for a period of time;
s4, opening a second outlet of the three-way valve, sucking oil of the transformer into a negative pressure cavity of the negative pressure type oil extractor under negative pressure, closing the second outlet after the cavity is filled with the oil, taking down the negative pressure type oil extractor, sealing an oil inlet, and storing for later measurement;
s5, the lower valve body is held by a hand, the sliding sleeve is pushed upwards, the limiting column retracts into the limiting cavity, and the lower valve body is taken down from the upper valve body;
s6, continuously keeping the height of the lower valve body, opening the first outlet of the three-way valve again, discharging oil remained in the pipeline of the sampling device into a waste liquid bottle, and finishing sampling.
The waste liquid bottle is a negative-pressure vacuum cavity, and a first outlet of the three-way valve is connected with the waste liquid bottle in a sealing mode.
When the device is used for taking oil, a first outlet of a three-way valve is opened, oil in a transformer flows into a liquid container from a valve body through a pipeline, air in an oil passage of the whole oil taking device is exhausted and cleaned, then the first outlet of the three-way valve is closed, a second outlet of the three-way valve is communicated with a negative pressure sampler, then quantitative oil is extracted, after sampling is finished, the second outlet of the three-way valve is closed, then an oil inlet of the negative pressure sampler is closed, sealing and detecting.
The method of the invention has the following working notes;
1. preparation: preparing working clothes, safety helmets, insulating shoes and insulating gloves, preparing a large wrench, a small wrench, an electrician tool, a negative pressure sampler, a waste oil bottle and the like, wiping an oil outlet of an oil taking valve of a transformer completely by using oil absorption paper, if the oil taking port of the transformer is not improved conventionally, firstly installing an upper flange plate at the oil outlet of the oil taking valve, screwing and fixing a plurality of bolts by using a wrench, then installing a lower valve body with a lower flange plate on the upper flange plate, and installing a dust cover on the lower flange plate when oil is not taken;
2. cleaning a container: the sampling container comprises a negative pressure sampler, a waste oil bottle and the like, before use, the sampling container is cleaned by gasoline, soap solution and trisodium phosphate, then is washed by clear water and finally is washed by distilled water for a plurality of times, the cleaned sampling container is put into an oven at 90 ℃ for drying, and after cooling, the sampler and the waste oil bottle are sealed, so that a cavity is kept in a negative pressure or vacuum-pumping state and cannot be opened before use;
3. sampling: when the oil is initially discharged, the air in the sampling pipe and the initial waste oil can be discharged into a waste oil bottle by the oil, the discharged oil amount is 0.3kg, impurities are prevented from being mixed into an oil sample when the oil is sampled, and then the three-way valve is rotated, so that the oil outlet valve can be closed when the oil reaches a half of a cavity of the sampler or reaches 30ml of the sampling pipe;
4, recording: after sampling is finished, a label is attached to the sampler, and the name, source, sampling date, sampling person and weather condition of the oil sample are annotated;
5, cleaning the site: and after the oil sample is taken, screwing the dust cover on the flange plate, and cleaning field sundries.
The invention can sample in various working environments and seasonal environments, has short sampling time, can not generate the situation of transformer oil leakage and waste, and samples in a state of sealing and isolating air, thereby greatly improving the oil sampling qualification rate; meanwhile, the operation of testing personnel is simple, the labor cost is reduced, and the oil sampling efficiency is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. An oil chamber sampling device of a transformer tapping switch comprises a valve body arranged at an oil taking port of a transformer, wherein an outlet of the valve body is connected with a first transparent oil taking pipe which is connected with a three-way valve, a first outlet of the three-way valve is communicated with an oil container through the oil taking pipe, and a second oil outlet of the three-way valve is detachably connected with a negative pressure oil taking device;
the transformer oil-taking valve is characterized in that the valve body comprises an upper valve body and a lower valve body, a first through channel is longitudinally arranged on the upper valve body (3), a connecting part (1) which is in sealing connection with an oil-taking port of a transformer is arranged at the upper end of the upper valve body (3), a sealing mechanism for sealing the oil outlet (14) is arranged at the position, located at the oil outlet (14) of the first channel, of the lower end of the upper valve body (3), a second through channel is longitudinally arranged on the lower valve body (8), a sleeving part which is used for sleeving the bottom of the upper valve body is arranged at the upper part of the lower valve body (8), a trigger part (7) which triggers the sealing mechanism to be opened is arranged in the lower valve body, and after the lower valve body (8) is sleeved on the upper valve body (3), the sealing mechanism is opened by the trigger part (7) so as to penetrate through the first channel and the second channel;
the sealing mechanism comprises a conical plug (12), the conical plug (12) penetrates through the oil outlet (14), a sealing plate (10) is connected to the top of the conical plug (12), the bottom of the sealing plate (10) is connected with the bottom inner cavity wall of the upper valve body through an elastic connecting piece (15), and the conical plug (12) reciprocates in the oil outlet (14) to realize the sealing and opening of the sealing mechanism on the oil outlet (14);
the lower valve body is characterized in that a sliding sleeve (5) is arranged outside the sleeving part, the bottom end of the sliding sleeve (5) is connected with the lower valve body connecting part through a return elastic part, so that the sliding sleeve (5) can slide up and down along the sleeving part, a limiting cavity (19) is radially arranged on the connecting part, a reset spring (17) is arranged in the limiting cavity (19), a limiting column (16) is arranged, the limiting column (16) penetrates through the reset spring (17), one end of the limiting column (16) extends into the second channel, a stop plate (18) is arranged in the limiting cavity (19), the reset spring (17) is clamped between the stop plate (18) and an outlet in the limiting cavity, the bottom end of the reset spring (17) is fixed on the limiting column (16), one end, far away from the second channel, of the limiting column (16) abuts against the inner wall of the sliding sleeve (5), and the reset spring (17) is used for stretching of the limiting column (16); the periphery of the upper valve body is provided with a positioning groove (4) clamped with a limiting column (16), the inner wall of the sliding sleeve (5) is an inclined surface from top to bottom, and the inclined surface is used for providing a return space for the limiting column when the sliding sleeve (5) slides upwards so as to enable the end part of the limiting column to return into the limiting cavity (19);
trigger portion (7) including establishing the perforated plate in the second passageway, the protrusion is equipped with the trigger post on the perforated plate, the trigger post is used for triggering sealing mechanism.
2. The transformer tap changer oil chamber sampling device according to claim 1, wherein an upper flange (20) is arranged at the oil taking port of the transformer, a lower flange (21) is arranged at the top end of the valve body, the upper flange (20) and the lower flange (21) are detachably and hermetically connected, and a filter screen (22) is clamped between the upper flange (20) and the lower flange (21).
3. The oil chamber sampling device of the transformer tap changer according to claim 2, characterized in that the lower flange (21) is further provided with a threaded connection portion (22) at the outer periphery thereof, and a protective cover (23) detachable from the threaded connection portion (22) is provided, wherein when the lower valve body is not mounted on the upper valve body in a matching manner, the protective cover (23) is detachably connected with the threaded connection portion (22) of the lower flange (21).
4. A method for sampling an oil chamber of a transformer tap changer, comprising using a sampling device according to any one of the preceding claims, the method comprising the steps of:
s1, communicating a first transparent oil taking pipe with a three-way valve with an outlet of a lower valve body through an adapter;
s2, communicating a first outlet of the three-way valve with an oil container through an oil taking pipe; the second outlet is communicated with a negative pressure oil extractor, wherein the three-way valve is in a closed state, and an oil cavity of the negative pressure oil extractor is in a vacuum pumping state;
s3, taking down a protective cover of the oil taking port of the transformer, holding the sliding sleeve of the lower valve body, aligning the top end of the lower valve body to the lower end of the upper valve body, pushing the lower valve body upwards, enabling the sliding sleeve to move upwards relative to the lower valve body under the action of stress, enabling the sliding sleeve to be positioned at a limiting column, enabling the limiting column to return to the limiting cavity under the action of elastic restoring force, pushing the lower valve body into the valve cavity of the upper valve body, keeping the position of the lower valve body after the lower valve body is positioned in place, loosening the sliding sleeve, resetting the sliding sleeve, enabling the limiting column to stretch out of the limiting cavity and be clamped in the positioning groove under the pushing force of the sliding sleeve, and meanwhile, opening the sealing mechanism by a triggering part to enable the valve body to be in an opening state;
s4, opening a first outlet of the three-way valve, and allowing the transformer oil to flow into an oil container after passing through a valve body and a pipeline; closing the first outlet after the first outlet is opened for a period of time;
s5, opening a second outlet of the three-way valve, sucking oil of the transformer into a negative pressure cavity of the negative pressure oil extractor under negative pressure, closing the second outlet after the cavity is filled with the oil, removing the negative pressure oil extractor, sealing an oil inlet, and storing for later measurement;
s6, the lower valve body is held by a hand, the sliding sleeve is pushed upwards, the limiting column retracts into the limiting cavity, and the lower valve body is taken down from the upper valve body;
s7, continuously keeping the height of the lower valve body, opening the first outlet of the three-way valve again, discharging oil retained in the pipeline of the sampling device into the oil container, and finishing sampling.
5. The sampling method for the oil chamber of the tap changer of the transformer as claimed in claim 4, wherein the oil container is a vacuum chamber with negative pressure, and the first outlet of the three-way valve is hermetically connected with the oil container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010866302.2A CN111982598B (en) | 2020-08-26 | 2020-08-26 | Transformer tap switch oil chamber sampling device and sampling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010866302.2A CN111982598B (en) | 2020-08-26 | 2020-08-26 | Transformer tap switch oil chamber sampling device and sampling method |
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| Publication Number | Publication Date |
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| CN111982598A CN111982598A (en) | 2020-11-24 |
| CN111982598B true CN111982598B (en) | 2022-12-06 |
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| CN202010866302.2A Active CN111982598B (en) | 2020-08-26 | 2020-08-26 | Transformer tap switch oil chamber sampling device and sampling method |
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| CN210719795U (en) * | 2019-08-30 | 2020-06-09 | 湖南华电云通电力技术有限公司 | Mutual inductor oil taking tool and transformer with same |
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| GB0510477D0 (en) * | 2005-05-23 | 2005-06-29 | Uk Sampling Gauges Ltd | Sampling apparatus |
| CN103353014B (en) * | 2013-07-09 | 2017-02-01 | 福建省海洋阀门科技有限公司 | double protection valve lock |
| CN204594743U (en) * | 2015-04-30 | 2015-08-26 | 国家电网公司 | A kind of transformer oil sampler |
| CN206206756U (en) * | 2016-11-20 | 2017-05-31 | 江苏庆海石油机械有限公司 | A kind of swinging stop valve |
| CN106979377B (en) * | 2017-03-30 | 2023-08-04 | 西安航天动力研究所 | Manual locking device |
| CN208140528U (en) * | 2018-04-26 | 2018-11-23 | 上海龙象环保科技有限公司 | It is a kind of to switch the device for realizing measurement air-borne dust concentration many kinds of parameters by threeway |
| CN209856577U (en) * | 2019-03-11 | 2019-12-27 | 江苏重亚重工有限公司 | High-pressure rubber pipe assembly with quick pressure relief function |
| CN209707168U (en) * | 2019-04-08 | 2019-11-29 | 广东电网有限责任公司 | Insulating oil sampler suitable for on-load voltage regulating switch |
| CN213422705U9 (en) * | 2020-08-26 | 2021-08-06 | 国网安徽省电力有限公司亳州供电公司 | Transformer tapping switch oil chamber sampling device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108414286A (en) * | 2018-01-11 | 2018-08-17 | 重庆长安汽车股份有限公司 | Oil sampling device in a kind of fuel tank |
| CN210719795U (en) * | 2019-08-30 | 2020-06-09 | 湖南华电云通电力技术有限公司 | Mutual inductor oil taking tool and transformer with same |
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