CN218849256U - Explosion-proof current transformer - Google Patents
Explosion-proof current transformer Download PDFInfo
- Publication number
- CN218849256U CN218849256U CN202223198732.5U CN202223198732U CN218849256U CN 218849256 U CN218849256 U CN 218849256U CN 202223198732 U CN202223198732 U CN 202223198732U CN 218849256 U CN218849256 U CN 218849256U
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- China
- Prior art keywords
- upper cover
- cover plate
- stainless steel
- oil conservator
- corrugated pipe
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- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 28
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 27
- 239000010935 stainless steel Substances 0.000 claims abstract description 27
- 238000005422 blasting Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 6
- 230000009172 bursting Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000555745 Sciuridae Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Housings And Mounting Of Transformers (AREA)
Abstract
The utility model relates to an explosion-proof type current transformer, its characterized in that: comprises an expander, an oil conservator, a conductive tube, a secondary lead tube, a porcelain bushing and a base; the vent valve is arranged on the blasting sheet, so that gas in a product can be discharged during oil injection; the stainless steel corrugated pipe is stretched or shortened along with the change of the volumes of the expander and the insulating oil in the whole transformer; the height of the upper cover plate is increased or reduced along with the expansion of the stainless steel corrugated pipe; the limiting rod limits the maximum value of the lifting height of the upper cover plate; when the upper cover plate rises to the highest point, the volume of the insulating oil continues to increase, and the pressure in the mutual inductor product can be increased, so that the rupture disk is changed from concave to convex, when the mutual inductor product breaks down, and the pressure in the product reaches the limit pressure which can be borne by the rupture disk, the rupture disk can be burst, the pressure in the product is released, and the damage to the product is reduced.
Description
Technical Field
The utility model relates to an explosion-proof type current transformer technical field especially relates to an explosion-proof type current transformer.
Background
The expander is an elastic component, is installed on the mutual inductor for compensating the volume change of the insulating oil in the mutual inductor, which is generated due to the temperature change, so that the insulating oil is isolated from the external environment, the insulating oil is prevented from being affected with damp, aged and deteriorated, and the safety of the product operation is ensured.
At present, a dangerous phenomenon exists when the current transformer operates: since a fault or other abnormal condition may occur inside the current transformer, a large amount of gas is generated inside the current transformer, so that the internal pressure is continuously increased (even sharply increased). When the pressure exceeds the bearing capacity of the current transformer, the transformer can explode, serious potential safety hazards are brought to the normal operation of a power system, and even the personal safety is threatened.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an explosion-proof type current transformer, the expander that can solve general current transformer because of the big back that explodes that takes place of internal pressure, whole current transformer damages, and the loss is big, causes the problem of casualties even.
In order to solve the technical problem, the technical scheme of the utility model is that: the explosion-proof current transformer is characterized in that: comprises an expander, an oil conservator, a conductive tube, a secondary lead tube, a porcelain bushing and a base;
the expander is arranged at the top end of the oil conservator and comprises a bottom plate, a stainless steel corrugated pipe, a limiting rod, an upper cover plate and a rupture disk; the bottom plate is of a circular ring-shaped structure, and a plurality of threaded holes matched with the limiting rods are formed in the bottom plate along the circumferential direction; the stainless steel corrugated pipe is of a cylindrical structure, and the bottom end of the stainless steel corrugated pipe is welded on the upper surface of the bottom plate; a flange plate is welded at the top end of the stainless steel corrugated pipe, and a guide hole matched with the limiting rod and a plurality of bolt holes matched with the upper cover plate are formed in the flange plate;
the upper cover plate is of an annular structure and is connected with a flange plate at the top end of the stainless steel corrugated pipe through a bolt, and a positioning hole corresponding to the guide hole in the flange plate is formed in the upper cover plate;
the limiting rods are provided with a plurality of limiting nuts, the top ends of the limiting rods are provided with limiting nuts, and external threads are arranged at positions, close to the bottom ends, of the limiting rods; the bottom end of the limiting rod sequentially penetrates through the positioning hole of the upper cover plate and the guide hole in the flange plate, the external thread at the bottom end of the limiting rod is matched with the threaded hole in the bottom plate, and a locking nut is further arranged at the external thread to realize locking after the bottom end of the limiting rod is connected with the bottom plate; the top end of the external thread at the bottom end of the limiting rod to the top end of the limiting rod is a smooth section; the stainless steel corrugated pipe, the flange plate and the upper cover plate can move in the vertical direction along the smooth section of the limiting rod; the rupture disk is of a circular structure, is arranged between the upper cover plate and the flange plate, and is sunken towards the stainless steel corrugated pipe to form a concave cambered surface;
the bottom end of the oil conservator is connected to the top end of the porcelain bushing, and a conductive tube mounting hole penetrating through the oil conservator is formed in the oil conservator along the horizontal direction; a secondary winding is arranged in the oil storage cabinet; the conductive tube is horizontally arranged in a conductive tube mounting hole of the oil conservator and penetrates through a secondary winding in the oil conservator, two ends of the conductive tube extend out of the outer side of the oil conservator, and a primary conductive bar and a secondary conductive bar are respectively arranged at two ends of the conductive tube;
the top end of the porcelain sleeve is connected with the bottom end of the oil conservator in a sealing manner, and the bottom end of the porcelain sleeve is connected to the base; a secondary junction box is arranged at the bottom end of the porcelain sleeve, and a squirrel-cage structure type electrode is arranged in the porcelain sleeve; the secondary lead tube is arranged in the porcelain sleeve along the vertical direction, and the secondary lead tube penetrates through the electrode and the porcelain sleeve to be connected with a secondary junction box at the bottom end of the porcelain sleeve.
Furthermore, an annular sealing groove is formed in the flange plate, and a sealing strip is arranged in the annular sealing groove.
Further, an exhaust valve is arranged on the blasting sheet, and pre-splitting grains are arranged on the blasting sheet.
Furthermore, the bursting pressure of the rupture disk is 0.2-0.25Mpa.
The utility model has the advantages of:
1) The utility model can discharge the gas in the product during oil injection by arranging the exhaust valve on the blasting sheet; the stainless steel corrugated pipe is stretched or shortened along with the change of the volumes of the expander and the insulating oil in the whole transformer; the height of the upper cover plate is increased or reduced along with the expansion of the stainless steel corrugated pipe; the limiting rod limits the maximum value of the lifting height of the upper cover plate; when the upper cover plate rises to the highest point, the volume of the insulating oil continues to increase, and the pressure in the mutual inductor product can be increased, so that the rupture disk is changed from concave to convex, when the mutual inductor product breaks down, and the pressure in the product reaches the limit pressure which can be borne by the rupture disk, the rupture disk can be burst, the pressure in the product is released, and the damage to the product is reduced.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the utility model discloses an explosion-proof type current transformer structure schematic diagram.
Fig. 2 is an expander structure diagram of an explosion-proof current transformer structure of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
An explosion-proof current transformer as shown in fig. 1 and fig. 2 comprises an expander 1, an oil conservator 2, a conductive tube 3, a secondary lead tube 4, a porcelain bushing 5 and a base 6.
The expander 1 is arranged at the top end of the oil conservator 2, and the expander 1 comprises a bottom plate 11, a stainless steel corrugated pipe 12, a limiting rod 13, an upper cover plate 14 and a rupture disk 15; the bottom plate 11 is of a circular ring-shaped structure, and a plurality of threaded holes matched with the limiting rods are formed in the bottom plate 11 along the circumferential direction; the stainless steel corrugated pipe 12 is of a cylindrical structure, and the bottom end of the stainless steel corrugated pipe 12 is welded on the upper surface of the bottom plate 11; the top end of the stainless steel corrugated pipe 12 is welded with a flange plate 16, and the flange plate 16 is provided with a guide hole matched with the limiting rod 13 and a plurality of bolt holes matched with the upper cover plate.
The upper cover plate 14 is of an annular structure, the upper cover plate 14 is connected with a flange plate at the top end of the stainless steel corrugated pipe 12 through bolts, and positioning holes corresponding to the guide holes in the flange plate 16 are formed in the upper cover plate 14.
The limiting rods 13 are provided with a plurality of limiting nuts, the top ends of the limiting rods 13 are provided with limiting nuts, and the positions, close to the bottom ends, of the limiting rods 13 are provided with external threads; the bottom end of the limiting rod 13 sequentially penetrates through the positioning hole of the upper cover plate 14 and the guide hole in the flange plate, the external thread at the bottom end of the limiting rod 13 is matched with the threaded hole in the bottom plate, and a locking nut is further arranged at the external thread to realize locking after the bottom end of the limiting rod 13 is connected with the bottom plate; the top end of the external thread at the bottom end of the limiting rod 13 to the top end of the limiting rod 13 is a smooth section; the stainless steel corrugated pipe 12, the flange plate and the upper cover plate 14 can move in the vertical direction along the smooth section of the limiting rod 13; the rupture disk is of a circular structure, is arranged between the upper cover plate 14 and the flange plate, and the rupture disk 15 is sunken towards the stainless steel corrugated pipe 12 to form a concave arc surface.
The bottom end of the oil conservator 2 is connected with the top end of the porcelain bushing 5, and a conductive tube mounting hole penetrating through the oil conservator 2 is arranged on the oil conservator 2 along the horizontal direction; a secondary winding 31 is arranged in the oil conservator 2; the conductive tube 3 level is in the conductive tube mounting hole of oil conservator, and passes the secondary winding 31 in the oil conservator 2, and the both ends of conductive tube 3 extend the outside of oil conservator 2 and are provided with the first conductive row and the second conductive row respectively at the both ends of conductive tube 3.
The top end of the porcelain bushing 5 is hermetically connected with the bottom end of the oil conservator 2, and the bottom end of the porcelain bushing 5 is connected to the base; a secondary junction box 51 is arranged at the bottom end of the porcelain bushing 5, and a squirrel cage structure type electrode is arranged in the porcelain bushing 5; the secondary lead tube 4 is arranged in the porcelain sleeve along the vertical direction, and the secondary lead tube 4 penetrates through the electrode and the porcelain sleeve 5 to be connected with a secondary junction box 51 at the bottom end of the porcelain sleeve 5.
An annular sealing groove is formed in the flange plate 16, and a sealing strip is arranged in the annular sealing groove.
An exhaust valve is arranged on the blasting sheet 15, and pre-splitting grains are arranged on the blasting sheet.
The burst pressure of the burst disk 15 is 0.2-0.25Mpa.
The utility model discloses a theory of operation is: the vent valve is arranged on the blasting sheet, so that gas in a product can be discharged during oil injection; the stainless steel corrugated pipe is extended or shortened along with the change of the volumes of the expander and the insulating oil in the whole transformer; the height of the upper cover plate is increased or reduced along with the expansion of the stainless steel corrugated pipe; the limiting rod limits the maximum value of the lifting height of the upper cover plate; when the upper cover plate rises to the highest point, the volume of the insulating oil continues to increase, and the pressure in the mutual inductor product can be increased, so that the rupture disk is changed from concave to convex, when the mutual inductor product breaks down, and the pressure in the product reaches the limit pressure which can be borne by the rupture disk, the rupture disk can be burst, the pressure in the product is released, and the damage to the product is reduced.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides an explosion-proof type current transformer which characterized in that: comprises an expander, an oil conservator, a conductive tube, a secondary lead tube, a porcelain bushing and a base;
the expander is arranged at the top end of the oil conservator and comprises a bottom plate, a stainless steel corrugated pipe, a limiting rod, an upper cover plate and a rupture disk; the bottom plate is of a circular ring-shaped structure, and a plurality of threaded holes matched with the limiting rods are formed in the bottom plate along the circumferential direction; the stainless steel corrugated pipe is of a cylindrical structure, and the bottom end of the stainless steel corrugated pipe is welded on the upper surface of the bottom plate; a flange plate is welded at the top end of the stainless steel corrugated pipe, and a guide hole matched with the limiting rod and a plurality of bolt holes matched with the upper cover plate are formed in the flange plate;
the upper cover plate is of an annular structure and is connected with a flange plate at the top end of the stainless steel corrugated pipe through bolts, and positioning holes corresponding to the guide holes in the flange plate are formed in the upper cover plate;
the limiting rods are provided with a plurality of limiting nuts, the top ends of the limiting rods are provided with limiting nuts, and external threads are arranged at positions, close to the bottom ends, of the limiting rods; the bottom end of the limiting rod sequentially penetrates through the positioning hole of the upper cover plate and the guide hole in the flange plate, the external thread at the bottom end of the limiting rod is matched with the threaded hole in the bottom plate, and a locking nut is further arranged at the external thread to realize locking after the bottom end of the limiting rod is connected with the bottom plate; the top end of the external thread at the bottom end of the limiting rod to the top end of the limiting rod is a smooth section; the stainless steel corrugated pipe, the flange plate and the upper cover plate can move in the vertical direction along the smooth section of the limiting rod; the rupture disk is of a circular structure, is arranged between the upper cover plate and the flange plate, and is sunken towards the stainless steel corrugated pipe to form a concave cambered surface;
the bottom end of the oil conservator is connected to the top end of the porcelain bushing, and a conductive tube mounting hole penetrating through the oil conservator is arranged on the oil conservator along the horizontal direction; a secondary winding is arranged in the oil conservator; the conductive tube is horizontally arranged in a conductive tube mounting hole of the oil conservator and penetrates through a secondary winding in the oil conservator, two ends of the conductive tube extend out of the outer side of the oil conservator, and a primary conductive bar and a secondary conductive bar are respectively arranged at two ends of the conductive tube;
the top end of the porcelain sleeve is hermetically connected with the bottom end of the oil conservator, and the bottom end of the porcelain sleeve is connected to the base; a secondary junction box is arranged at the bottom end of the porcelain sleeve, and a squirrel-cage structure type electrode is arranged in the porcelain sleeve; the secondary lead tube is arranged in the porcelain sleeve along the vertical direction, and the secondary lead tube penetrates through the electrode and the porcelain sleeve to be connected with a secondary junction box at the bottom end of the porcelain sleeve.
2. An explosion-proof current transformer according to claim 1, characterized in that: an annular sealing groove is formed in the flange plate, and a sealing strip is arranged in the annular sealing groove.
3. An explosion-proof current transformer according to claim 1, characterized in that: an exhaust valve is arranged on the blasting sheet, and pre-splitting grains are arranged on the blasting sheet.
4. An explosion-proof current transformer according to claim 1, characterized in that: the bursting pressure of the bursting disc is 0.2-0.25Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223198732.5U CN218849256U (en) | 2022-12-01 | 2022-12-01 | Explosion-proof current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223198732.5U CN218849256U (en) | 2022-12-01 | 2022-12-01 | Explosion-proof current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218849256U true CN218849256U (en) | 2023-04-11 |
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ID=87303176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223198732.5U Active CN218849256U (en) | 2022-12-01 | 2022-12-01 | Explosion-proof current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218849256U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113674A1 (en) * | 2022-12-01 | 2024-06-06 | 江苏思源赫兹互感器有限公司 | Explosion-proof expander |
-
2022
- 2022-12-01 CN CN202223198732.5U patent/CN218849256U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113674A1 (en) * | 2022-12-01 | 2024-06-06 | 江苏思源赫兹互感器有限公司 | Explosion-proof expander |
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| GR01 | Patent grant |