CN105047377A - Power-transformer overall vacuumizing device - Google Patents
Power-transformer overall vacuumizing device Download PDFInfo
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- CN105047377A CN105047377A CN201510555603.2A CN201510555603A CN105047377A CN 105047377 A CN105047377 A CN 105047377A CN 201510555603 A CN201510555603 A CN 201510555603A CN 105047377 A CN105047377 A CN 105047377A
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Abstract
The invention discloses a power-transformer overall vacuumizing device. The power-transformer overall vacuumizing device comprises a transformer body, a body oil conservator, a capsule and an on-load oil conservator. The transformer body is communicated with the body oil conservator. The capsule is arranged in the body oil conservator. The on-load oil conservator is communicated with an on-load tap-changer oil chamber in the transformer body. A control assembly used for installing a relief plug back in the vacuum state is installed at an exhausting opening of the body oil conservator and comprises a cavity communicated with the body oil conservator before the relief plug is placed down. The cavity is communicated with a first vacuumizing pipe. The power-transformer overall vacuumizing device further comprises a pipe assembly used for vacuumizing the on-load oil conservator, the on-load tap-changer oil chamber and the capsule. According to the power-transformer overall vacuumizing device, recovering in the vacuum undamaged state is achieved through the exhausting opening of the body oil conservator in cooperation with the control assembly, oil injection can be carried out in the state of being not in contact with air completely, insulating oil is not in contact with the air completely, the content of the air in transformer oil is greatly reduced, and the insulation effect inside a transformer is improved.
Description
Technical field
The present invention relates to a kind of electric power tool, particularly relate to the overall vacuum extractor of a kind of power transformer.
Background technology
Large-scale power transformer is as the conveying of electric energy, conversion maincenter equipment, and play an important role in electrical network, it is installed and maintenance craft quality brings obvious impact to the operation conditions after putting equipment in service, is directly connected to the safe and stable operation of equipment.
Vacuumize and oiling installs important procedure with in overhaul process together with as transformer, the quality of its technique insulation property that are direct and inside transformer are closely related.Vacuumize is in order to by the gas separaion of inside transformer and transformer insulation oil inside out, improve built-in electrical insulation, prevention main transformer vacuumizing effect is not good causes that a large amount of gas is stagnant stays inside transformer and transformer insulation oil is inner, will cause the generation of main transformer decreasing insulating and a series of Accident of Transformer.
Execute provision 9.2.2.1 bar according to " the great anti-accident of State Grid Corporation of China's 18 electrical networks is arranged " to specify: new to install and transformer after overhaul should specify to carry out to vacuumize in strict accordance with related standards or producer, vacuum oil and Circulation and Hot Oil Spray, vacuum degree, pumpdown time, oil injecting speed and Circulation and Hot Oil Spray time, temperature all should reach requirement.To adopting the oil tank of transformer of on load tap changer to vacuumize on request simultaneously, but should notice that vacuumizing front application communicating pipe connects body and switch grease chamber.And State Grid Corporation of China 110 (66) kV ~ 500kV oil-filled transformer (reactor) inspection code Article 27 (three) regulation 110kV and above transformer should adopt vacuum oil.What possess band oil conservator vacuum oil condition should be with oil conservator vacuum oil, but the isolating valve of oil conservator with the oil conservator UNICOM of collapsible bag, barrier film and on load tap changer itself should be opened, or vacuumize after connecting with interim connecting leg, in order to avoid collapsible bag, barrier film and loaded tap switch insulation tube are damaged simultaneously.
Install and overhaul process at the old large-scale 110kV transformer of existing majority, draining the oil to transformer, hanging bell jar inspection, test, after the cover that falls, need vacuumize, oiling.But in transformer installation and the on-the-spot vacuum pumping process of overhaul, usually vacuum breaker under the condition vacuumizing oiling (when usually will arrive load tap changer oil chamber 2 ＇ top at pasta) is not completed completely, as shown in Figure 1, remove interim pipeline (communicating pipe 5 ＇), recover original pipeline, then only proceed to vacuumize oiling to body oil conservator 3 ＇ and annex thereof.
(capsule type oil storage cabinet is usually shortly past time over half) vacuum breaker again when not completing transformer body 1 ＇ and body oil conservator 3 ＇ vacuum oil completely, originally capsule 4 ＇ is in deflated state, remove vaccum-pumping equipment and (remove communicating pipe 6 ＇, as shown in Figure 2), now, cannot proceed to vacuumize to transformer, vacuumize as proceeded and will cause capsule 4 ＇ swelling fracture, can only merely oiling to suitable oil level.In addition, this time vacuum breaker also causes transformer oil storage internal vacuum low, and air enters transformer body, reduces inside transformer insulation.
Summary of the invention
The invention provides the overall vacuum extractor of a kind of power transformer, which overcome the weak point existing for power transformer vacuum extractor of prior art.
The technical solution adopted for the present invention to solve the technical problems is: the overall vacuum extractor of a kind of power transformer, comprise transformer body, body oil conservator, capsule, have and carry oil conservator, transformer body is connected with body oil conservator, capsule is located in body oil conservator, has a year oil conservator to be connected with the load tap changer oil chamber in transformer body; The exhaust ports of body oil conservator is provided with the control assembly for reinstalling air relief cock under realizing vacuum state, and this control assembly has the chamber being communicated with body oil conservator before air relief cock puts down, this chamber first vacuum-pumping pipeline; Also comprise for carrying to having the pipeline assembly that oil conservator, load tap changer oil chamber and capsule vacuumize process.
In one embodiment, described control assembly comprise be installed on described exhaust ports and be formed described chamber body, coaxially arrange and the movable action bars being assemblied in body with described exhaust outlet, body is provided with the blow vent being communicated with its chamber, and this blow vent connects described first vacuum-pumping pipeline; One end sealing of action bars is stretched out originally external, and the other end is positioned at described chamber, and described air relief cock is connected to the action bars other end with can departing from action bars.
In one embodiment, described pipeline assembly comprises the second vacuum-pumping pipeline and the 3rd vacuum-pumping pipeline being connected described capsule that have year oil conservator or described load tap changer oil chamber described in connection.
In one embodiment, described body comprise be installed on described exhaust ports and be provided with connected entrance base, be connected to this base and surround the outer cover of described chamber dismantledly, be covered with described blow vent outward, described action bars activity is assemblied in outer cover; Described air relief cock is bolt, and the connected entrance of described base is provided with the internal thread suitable with bolt.
In one embodiment, the other end of described action bars is connected with bolt collar, and magnetic part is housed, and utilizes this magnetic part to adsorb described air relief cock.
In one embodiment, described first vacuum-pumping pipeline, the second vacuum-pumping pipeline, the 3rd vacuum-pumping pipeline are separately installed with the first valve, and are connected to a main pipe rail, this main pipe rail is provided with total valve.
In one embodiment, described first vacuum-pumping pipeline, the second vacuum-pumping pipeline, the 3rd vacuum-pumping pipeline side are also connected to the second valve, and the second valve is positioned at the rear side of described first valve; The second valve in described second vacuum-pumping pipeline and the 3rd vacuum-pumping pipeline is also connected to respirator.
In one embodiment, described first, second, third vacuum-pumping pipeline comprises respectively and is provided with described first valve, the second valve connect fixing pipeline and the flexible pipe of described main pipe rail, the two ends of the flexible pipe of described first vacuum-pumping pipeline adopt the fixing pipeline of flange and its to be connected with described control assembly respectively, the two ends of the flexible pipe of the second vacuum-pumping pipeline adopt the fixing pipeline of flange and its to have year oil conservator or load tap changer oil chamber to be connected with described respectively, and the two ends of the flexible pipe of the 3rd vacuum-pumping pipeline adopt the fixing pipeline of flange and its to be connected with described capsule respectively.
In one embodiment, described base is threaded mutually with described outer cover, after base separated by described outer cover, adopts a closure threads to be connected to described base; Described action bars is threadedly connected to described outer cover.
In one embodiment, described main pipe rail is also provided with non-return valve and vacuum gauge.
Compared to prior art, the present invention has following beneficial effect:
I, the present invention utilizes the exhaust outlet of body oil conservator and coordinates described control assembly, realize recovering under not vacuum breaker state, oiling can be carried out completely under the state not touching air, allow insulating oil not ingress of air completely, greatly reduce the gas content in transformer oil, substantially increase the insulation effect of inside transformer, reduce accident rate, and simple to operate;
II, the peak that present invention utilizes transformer carries out entirety and vacuumizes, and enables the process vacuumized cover overall process until oiling terminates, substantially increases the vacuum degree in transformer;
III, described first, second, third vacuum-pumping pipeline can vacuumize simultaneously, and can carry out control start and stop respectively, easy to operate, reliable;
IV, the present invention can farthest use the original pipeline of transformer to carry out vacuumizing oiling, reduces the man power and material consumed because overlapping interim pipeline;
V, present invention utilizes the pipeline that most of transformer all has, thus the present invention has general applicability to nearly all old type transformer;
VI, main pipe rail is provided with non-return valve, prevents because power phase mistake causes air to enter inside transformer.
Below in conjunction with drawings and Examples, the present invention is described in further detail; But the overall vacuum extractor of a kind of power transformer of the present invention is not limited to embodiment.
Accompanying drawing explanation
Fig. 1 is that the power transformer of prior art vacuumizes and oiling view one;
Fig. 2 is that the power transformer of prior art vacuumizes meter oiling view two;
Fig. 3 is structural representation of the present invention;
Fig. 4 is the structural representation of control assembly of the present invention;
Fig. 5 is the structural representation of pipeline assembly of the present invention (containing the first vacuum-pumping pipeline, main pipe rail etc.).
Embodiment
Embodiment, refer to shown in Fig. 3, Fig. 4, the overall vacuum extractor of a kind of power transformer of the present invention, comprise transformer body 1, body oil conservator 3, capsule 4, have and carry oil conservator 5, transformer body 1 adopts communicating pipe 11 to be connected with body oil conservator 3, capsule 4 is located in body oil conservator 3, has a year oil conservator 5 to adopt communicating pipe 51 to be connected with the load tap changer oil chamber 2 in transformer body 1.Exhaust outlet 31 place of body oil conservator 3 is provided with control assembly 6, this control assembly 6 is for reinstalling the air relief cock of body oil conservator 3 under realizing vacuum state, make the exhaust outlet 31 of its shutoff body oil conservator 3, this control assembly 6 has the chamber 66 being communicated with body oil conservator 3 before air relief cock puts down, and this chamber 66 is communicated with the first vacuum-pumping pipeline 7; Also comprise for carrying to having the pipeline assembly that oil conservator 5, load tap changer oil chamber and capsule 4 vacuumizes process.
In the present embodiment, as shown in Figure 4, described control assembly 6 comprise be installed on described exhaust outlet 31 place and be formed described chamber 66 body, arrange and the movable action bars 63 being assemblied in body with described exhaust outlet 31 is coaxial, body is provided with the blow vent being communicated with its chamber 66, and this blow vent adopts flange 102 to connect described first vacuum-pumping pipeline 7; One end sealing of action bars 63 is stretched out originally external, and the other end is positioned at described chamber 66, and described air relief cock can depart from action bars 63 ground and be connected to action bars 63 other end.
Described body specifically comprises and is installed on described exhaust outlet 31 place and the base 61 being provided with connected entrance, be connected to this base 61 dismantledly and surround the outer cover 62 of described chamber 66, outer cover 62 is provided with described blow vent, the activity of described action bars 63 is assemblied in outer cover 62 top, this outer cover 62 top is specifically set with sealing ring 67, and locking has tight loop 68, gap between action bars 63 and outer cover 62 is sealed, in addition, between described base 61 and body oil conservator 3, and be combined with sealing ring too between outer cover 62 and base 61, anti-outside air enters described chamber 66.Described air relief cock is specially bolt 32, and the connected entrance of described base 61 is provided with the internal thread suitable with bolt.
In the present embodiment, the other end of described action bars 63 is connected with bolt collar 64, and magnetic part 65 is housed, and this magnetic part 65 is specially strong magnets, utilizes this magnetic part 65 to adsorb described air relief cock, i.e. described bolt 32, is set with sealing ring outside this bolt 32.
In the present embodiment, the exhaust outlet 31 that described base 61 is threadedly connected to described body oil conservator 3 goes out, and described outer cover 62 is threadedly connected to described base 61, and after described outer cover 62 separates base 61, adopts a closure threads to be connected to described base 61; Described action bars 63 is threadedly connected to described outer cover 62.
In the present embodiment, described pipeline assembly comprises the second vacuum-pumping pipeline 8 and the 3rd vacuum-pumping pipeline 9 being connected described capsule 4 that there are year oil conservator 5 (or described load tap changer oil chamber 2) described in connection, and described first vacuum-pumping pipeline 7, second vacuum-pumping pipeline 8, the 3rd vacuum-pumping pipeline 9 are separately installed with first valve C1, C2, C3, and be connected to a main pipe rail 10, this main pipe rail 10 is provided with total valve D.
In the present embodiment, described first vacuum-pumping pipeline 7, second vacuum-pumping pipeline 8, the 3rd vacuum-pumping pipeline 9 side are also connected to second valve B1, B2, B3, and the second valve is positioned at the rear side of described first valve; Second valve B2, B3 in described second vacuum-pumping pipeline 8 and the 3rd vacuum-pumping pipeline 9 is also connected to respirator.Here, the side defining main pipe rail place described in described first valve neighbour is front side, and accordingly, described first valve is then rear side away from the side at described main pipe rail place.
In the present embodiment, as shown in Figure 5, described first vacuum-pumping pipeline 7, second vacuum-pumping pipeline 8, 3rd vacuum-pumping pipeline 9 comprises respectively and is provided with described first valve, second valve also connects the fixing pipeline 71 of described main pipe rail 10, 81, 91 and flexible pipe, the two ends of the flexible pipe of described first vacuum-pumping pipeline 7 adopt the fixing pipeline of flange 102 and its 71 to be connected with described control assembly 6 respectively, the two ends of the flexible pipe of the second vacuum-pumping pipeline 8 adopt the fixing pipeline of flange 102 and its 81 to have year oil conservator 5 or load tap changer oil chamber 2 to be connected with described respectively, the two ends of the flexible pipe of the 3rd vacuum-pumping pipeline 9 adopt the fixing pipeline of flange 102 and its 91 to be connected with described capsule 4 respectively.
In the present embodiment, described main pipe rail is also provided with non-return valve and vacuum gauge 101, and vacuum gauge 101 is installed on the rear side of described total valve D.Definition total valve D is front side near the side of vacuum pumping pump, and total valve D is then rear side away from the side of vacuum pumping pump.
The overall vacuum extractor of a kind of power transformer of the present invention, its course of work is as follows:
Main pipe rail 10 is connected with vacuum pumping pump, opens first valve C1, C2, C3 and total valve D, close second valve B1, B2, B3, utilize vacuum pumping pump to vacuumize; When vacuum degree acquires a certain degree time (133Pa), close total valve D, leave standstill 12 hours, observe vacuum gauge atmospheric pressure value and keep situation, judge to confirm there is ne-leakage in device;
After confirming ne-leakage, (oil content of on load tap changer and transformer body 1 is opened to carry out oiling on load tap changer and transformer body 1 respectively, independent oiling, and can have the oil level indicator carrying oil conservator 5 to control vacuum degree and injection flow, after oiling to suitable oil level according to vacuum degree during oiling, stop oiling), when on load tap changer oiling is to correct position, closes the first valve C2, isolate with pumped vacuum systems, open the second valve B2, reinstall respirator; Close first valve C1, C3 simultaneously, for preventing capsule 4 from breaking, first should close the first valve C1 and closing the first valve C3 again; Reinstall the air relief cock (i.e. described bolt 32) of body oil conservator 3 under vacuum conditions with control assembly 6, open the second valve B3 afterwards, vacuum breaker, reinstalls respirator.
The operating process that air relief cock (i.e. described bolt 32) is reinstalled the exhaust outlet 31 of body oil conservator 3 by above-mentioned control assembly 6 is under vacuum conditions as follows: when body oil conservator 3 starts to vacuumize, bolt 32 is adsorbed on bolt collar 64 li by magnetic part 65, action bars 63 is pulled to highest point (screw thread is fixed), vacuumizes.When the vacuum pumping is ended, close the first valve C1, rotary manipulation bar 63 makes it downward, is slowly screwed in the connected entrance of base 61 by bolt 32.Open the second valve B2 vacuum breaker subsequently, remove outer cover 62, reinstall capping (base 61 is stayed on body oil conservator 3).
The present invention is for the first vacuum-pumping pipeline 7 of unique interim overlap joint, utilize the air relief cock of body oil conservator 3, design described control assembly 6, realize reinstalling air relief cock under vacuum conditions, and remove the first vacuum-pumping pipeline 7 of interim overlap joint and not vacuum breaker, thus allow insulating oil not ingress of air completely, greatly reduce the gas content in transformer oil, improve inside transformer insulation, reduce accident rate.
Because transformer is different, therefore, the present invention is designed to comprise fixing pipeline and flexible pipe (band steel ring) two parts to described first vacuum-pumping pipeline 7, second vacuum-pumping pipeline 8, the 3rd vacuum-pumping pipeline 9 respectively, and flexible pipe two ends utilize flange to connect, the length of flexible pipe specifically can set according to actual conditions.
Above-described embodiment is only used for further illustrating the overall vacuum extractor of a kind of power transformer of the present invention; but the present invention is not limited to embodiment; every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all fall in the protection range of technical solution of the present invention.
Claims (10)
1. the overall vacuum extractor of power transformer, comprise transformer body, body oil conservator, capsule, have and carry oil conservator, transformer body is connected with body oil conservator, and capsule is located in body oil conservator, has a year oil conservator to be connected with the load tap changer oil chamber in transformer body; It is characterized in that: the exhaust ports of body oil conservator is provided with the control assembly for reinstalling air relief cock under realizing vacuum state, and this control assembly has the chamber being communicated with body oil conservator before air relief cock puts down, this chamber first vacuum-pumping pipeline; Also comprise for carrying to having the pipeline assembly that oil conservator, load tap changer oil chamber and capsule vacuumize process.
2. the overall vacuum extractor of power transformer according to claim 1, it is characterized in that: described control assembly comprise be installed on described exhaust ports and be formed described chamber body, coaxially arrange and the movable action bars being assemblied in body with described exhaust outlet, body is provided with the blow vent being communicated with its chamber, and this blow vent connects described first vacuum-pumping pipeline; One end sealing of action bars is stretched out originally external, and the other end is positioned at described chamber, and described air relief cock is connected to the action bars other end with can departing from action bars.
3. the overall vacuum extractor of power transformer according to claim 1 and 2, is characterized in that: described pipeline assembly comprises the second vacuum-pumping pipeline and the 3rd vacuum-pumping pipeline being connected described capsule that have year oil conservator or described load tap changer oil chamber described in connection.
4. the overall vacuum extractor of power transformer according to claim 2, it is characterized in that: described body comprise be installed on described exhaust ports and be provided with connected entrance base, be connected to this base and surround the outer cover of described chamber dismantledly, be covered with described blow vent outward, described action bars activity is assemblied in outer cover; Described air relief cock is bolt, and the connected entrance of described base is provided with the internal thread suitable with bolt.
5. the overall vacuum extractor of the power transformer according to claim 2 or 4, is characterized in that: the other end of described action bars is connected with bolt collar, and magnetic part is housed, utilizes this magnetic part to adsorb described air relief cock.
6. the overall vacuum extractor of power transformer according to claim 3, it is characterized in that: described first vacuum-pumping pipeline, the second vacuum-pumping pipeline, the 3rd vacuum-pumping pipeline are separately installed with the first valve, and be connected to a main pipe rail, this main pipe rail is provided with total valve.
7. the overall vacuum extractor of power transformer according to claim 6, it is characterized in that: described first vacuum-pumping pipeline, the second vacuum-pumping pipeline, the 3rd vacuum-pumping pipeline side are also connected to the second valve, and the second valve is positioned at the rear side of described first valve; The second valve in described second vacuum-pumping pipeline and the 3rd vacuum-pumping pipeline is also connected to respirator.
8. the overall vacuum extractor of power transformer according to claim 7, it is characterized in that: described first, second, 3rd vacuum-pumping pipeline comprises respectively and is provided with described first valve, second valve also connects fixing pipeline and the flexible pipe of described main pipe rail, the two ends of the flexible pipe of described first vacuum-pumping pipeline adopt the fixing pipeline of flange and its to be connected with described control assembly respectively, the two ends of the flexible pipe of the second vacuum-pumping pipeline adopt the fixing pipeline of flange and its to have year oil conservator or load tap changer oil chamber to be connected with described respectively, the two ends of the flexible pipe of the 3rd vacuum-pumping pipeline adopt the fixing pipeline of flange and its to be connected with described capsule respectively.
9. the overall vacuum extractor of power transformer according to claim 4, is characterized in that: described base is threaded mutually with described outer cover, after base separated by described outer cover, adopts a closure threads to be connected to described base; Described action bars is threadedly connected to described outer cover.
10. the overall vacuum extractor of power transformer according to claim 6, is characterized in that: described main pipe rail is also provided with non-return valve and vacuum gauge.
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| CN201510555603.2A CN105047377B (en) | 2015-09-02 | 2015-09-02 | A kind of overall vacuum extractor of power transformer |
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| CN201510555603.2A CN105047377B (en) | 2015-09-02 | 2015-09-02 | A kind of overall vacuum extractor of power transformer |
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| CN106373730A (en) * | 2016-11-25 | 2017-02-01 | 山东电力设备有限公司 | Novel transformer oil tank air-bleed structure |
| JP2019129197A (en) * | 2018-01-23 | 2019-08-01 | 東芝産業機器システム株式会社 | Oil-filled stationary induction apparatus |
| CN111810466A (en) * | 2020-07-04 | 2020-10-23 | 中国石油天然气集团有限公司 | Oil injection device and oil injection process |
| CN112201462A (en) * | 2020-08-31 | 2021-01-08 | 国家电网有限公司 | Special tool for multipoint vacuum pumping of super-huge transformer |
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| CN105047377B (en) | 2017-08-04 |
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