CN112216478B - Balanced pressure conservator and transformer - Google Patents
Balanced pressure conservator and transformer Download PDFInfo
- Publication number
- CN112216478B CN112216478B CN202011034691.9A CN202011034691A CN112216478B CN 112216478 B CN112216478 B CN 112216478B CN 202011034691 A CN202011034691 A CN 202011034691A CN 112216478 B CN112216478 B CN 112216478B
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- diaphragm
- pressure
- storage tank
- oil storage
- conservator
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- 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
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- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
Abstract
The invention relates to the technical field of transformers and discloses a pressure balancing conservator and a transformer, wherein the pressure balancing conservator comprises an oil storage tank, a diaphragm, a flexible opening, an electromagnetic compression structure and a pressure detection structure; the oil storage tank is of a hollow structure with an upward opening, the periphery of the diaphragm is connected with the inner wall of the oil storage tank, and a storage space for storing transformer oil is formed between the diaphragm and the oil storage tank; the flexible opening sets up on the diaphragm, electromagnetism compact structure's both sides with batch oil tank both sides inner wall fixed connection, electromagnetism compact structure can the centre gripping flexible open-ended upper surface and lower surface, pressure detection structure with electromagnetism compact structure electricity is connected, pressure detection structure can contact with the diaphragm because of pressure takes place to warp. The invention accurately controls the opening and closing of the flexible opening, so that the transformer oil in the storage space always works under the pressure of one stable point.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a pressure-balancing oil conservator and a transformer.
Background
The breadth of our country is broad, the power transmission network is densely distributed, and a transformer is needed at the tail end of the network for voltage conversion. The transformer oil is generally used for heat dissipation of the existing transformer, the transformer oil can be guaranteed to have good heat dissipation function only by keeping stability all the time, the purity of the transformer oil is guaranteed in order to avoid contact of the transformer oil with air and moisture absorption or contact of pollutants, a sealing structure of a corrugated oil cavity is usually adopted for an oil conservator, although the structure can avoid contact of the transformer oil with air, the deformation of the structure is small, certain pressure can be generated by the transformer oil during supercooling or overheating, the service life of a sealing element can be influenced by operation under pressure, and the disassembly and maintenance of the oil conservator with the structure are troublesome.
In order to solve the problem, CN105070471 discloses a diaphragm type balance pressure conservator which comprises an oil storage tank and a diaphragm, wherein the oil storage tank is provided with an outer edge, the diaphragm is provided with a circle of sealing ring buckled on the outer edge of the oil storage tank, the inner edge of the sealing ring is connected with an annular outer wall extending downwards along the inner wall of the oil storage tank, the annular outer wall extends to a position between one half and three quarters of the depth of the tank and then turns back upwards, a turning back section gradually draws close upwards to form a flexible membrane cavity protruding upwards, the upper part of the flexible membrane cavity is provided with a closed flexible opening, the upper part of the flexible membrane cavity is connected with a mark post, and the oil storage tank is provided with an upper cover buckled on the sealing ring; the transformer oil is guaranteed to work under a stable pressure all the time, the sealing performance is guaranteed, and when the oil quantity or the pressure are too large, the transformer oil can break through a closed flexible opening and flows out of a transformer circulating system.
However, when the closed flexible opening is subjected to internal pressure, the stress generated by the contact surface of the flexible opening when the flexible opening is slightly deformed disappears, and the flexible opening is easily converted from a closed state to an open state, so that the diaphragm is difficult to ensure that the transformer oil always works under the pressure of a stable point.
Disclosure of Invention
The invention aims to provide a pressure-balancing conservator and a transformer, which can solve the problem that a diaphragm in the prior art is difficult to ensure that transformer oil always works under the pressure of a stable point.
In order to achieve the above object, a first aspect of the present invention provides a balanced pressure conservator, including an oil storage tank, a diaphragm, a flexible opening, an electromagnetic compression structure, and a pressure detection structure; the oil storage tank is of a hollow structure with an upward opening, the periphery of the diaphragm is connected with the inner wall of the oil storage tank, and a storage space for storing transformer oil is formed between the diaphragm and the oil storage tank; the flexible opening is arranged on the diaphragm, two sides of the electromagnetic compaction structure are fixedly connected with the inner walls of two sides of the oil storage tank, the electromagnetic compaction structure can clamp the upper surface and the lower surface of the flexible opening, the pressure detection structure is electrically connected with the electromagnetic compaction structure, and the pressure detection structure can be in contact with the diaphragm deformed due to pressure;
the electromagnetic compaction structure comprises a connecting column, an electromagnet and magnetic metal; the connecting column is positioned above the diaphragm, two ends of the connecting column are fixedly connected with the inner walls of the two sides of the oil storage tank respectively, the electromagnet is hinged with the connecting column, the magnetic metal is positioned below the diaphragm and corresponds to the electromagnet in the vertical direction, and two ends of the magnetic metal are fixedly connected with the inner walls of the two sides of the oil storage tank respectively;
the pressure detection structure comprises an installation arm and a microswitch, the installation arm is fixedly connected with the upper surface of the electromagnet, the installation arm extends towards the connecting column, and the microswitch is fixedly connected with the lower surface of one end of the electromagnet far away from the installation arm.
According to the invention, the deformation degree of the diaphragm is detected by the pressure detection structure to serve as a signal, and the flexible opening is opened and closed by the electromagnetic compression structure, so that the opening and closing of the flexible opening are accurately controlled, and the transformer oil in the storage space can always work under the pressure of a stable point.
Furthermore, a plurality of first flow channels are arranged on the electromagnet, and a plurality of second flow channels which are communicated up and down are arranged on the magnetic metal.
Further, the first flow channel and the second flow channel are arranged in a staggered manner in the horizontal direction.
Furthermore, the lower surface of the electromagnet is provided with a stop block, the upper surface of the diaphragm is provided with a slot, and the stop block is matched with the slot.
Furthermore, the micro switches are arranged in a plurality, and the lower surfaces of the micro switches are connected with a linkage plate.
Further, the balanced pressure conservator further comprises a controller, and the controller is electrically connected with the electromagnetic compaction structure and the microswitch.
Further, the longitudinal section of the gap of the flexible opening contact surface is in a square corrugated shape.
The invention provides a transformer which comprises the balanced pressure conservator.
According to the invention, the deformation degree of the diaphragm is detected by the pressure detection structure to serve as a signal, and the flexible opening is opened and closed by the electromagnetic compression structure, so that the opening and closing of the flexible opening are accurately controlled, the transformer oil in the storage space is enabled to work under the pressure of a stable point all the time, and the heat dissipation capability of the transformer is further ensured.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
fig. 3 is a schematic structural diagram of an embodiment of an electromagnetic pressing structure and a pressure detection structure.
Description of the reference numerals
1 oil reservoir 2 diaphragm
3 Flexible opening 4 storage space
51 connecting column 52 electromagnet
53 magnetic metal 61 first flow channel
62 second flow passage 7 stop
81 mounting arm 82 microswitch
83 linkage plate 9 guide plate
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, the use of the terms of orientation such as "upper and lower" in the case where no description is made to the contrary generally means the orientation in the assembled and used state. "inner and outer" refer to the inner and outer contours of the respective component itself.
In order to realize that the transformer oil in the conservator always works under the pressure of one stable point, as shown in fig. 1-3, the invention provides a balanced pressure conservator in a first aspect, wherein the balanced pressure conservator comprises an oil storage tank 1, a diaphragm 2, a flexible opening 3, an electromagnetic compression structure and a pressure detection structure; the oil storage tank 1 is of a hollow structure with an upward opening, the periphery of the diaphragm 2 is connected with the inner wall of the oil storage tank 1, and a storage space 4 for storing transformer oil is formed between the diaphragm 2 and the oil storage tank 1; flexible opening 3 sets up on diaphragm 2, electromagnetism compact structure's both sides with 1 both sides inner wall fixed connection of batch oil tank, electromagnetism compact structure can the centre gripping flexible opening 3's upper surface and lower surface, pressure detection structure with electromagnetism compact structure electricity is connected, pressure detection structure can contact with diaphragm 2 because of pressure takes place to warp.
According to the invention, the deformation degree of the diaphragm 2 is detected by the pressure detection structure to be used as a signal, and the flexible opening 3 is opened and closed by the electromagnetic compression structure, so that the opening and closing of the flexible opening 3 are accurately controlled, and the transformer oil in the storage space 4 always works under the pressure of a stable point.
As another embodiment, as shown in fig. 1, the peripheral edges of two sides of the diaphragm 2 are fixedly connected to the inner walls of two sides of the oil storage tank 1 through a baffle 9, the baffle 9 is inclined downwards from the side close to the diaphragm 2 to the side close to the inner wall of the oil storage tank 1, the baffle 9 and the inner wall of the oil storage tank 1 form a sinking space for storing the transformer oil discharged from the flexible opening 3; preferably, a filter screen is arranged on the guide plate 9, the filter screen is in a shape like a Chinese character 'ren', the sharp corner of the filter screen faces the diaphragm 2, and two arms of the filter screen face the inside of the oil storage tank 1, so that discharged transformer oil can be filtered, impurities in the transformer oil can be separated, and the transformer oil can be reused in the subsequent process; the herringbone arrangement can enable the impurities to slide down to the lowest end along the two arms after being filtered, so that the impurities can be stably precipitated; further preferably, the lowermost end of the deflector 9 is provided with a check valve for enabling the transformer oil to flow from the upper part of the deflector 9 to the lower part of the deflector 9, and the check valve is used for preventing the transformer oil in the storage space 4 from contacting with the check valve when the hydraulic oil in the storage space 4 is gradually reduced to be lower than the lowermost end of the deflector 9, and when the pressure in the storage space 4 is reduced due to thermal expansion and cold contraction, the pressure and the check valve are opened, and the transformer oil filtered by the deflector 8 is used for supplementing the storage space 4.
As an embodiment of the electromagnetic pressing structure, in order to be able to precisely control the opening and closing of the flexible opening 3, the electromagnetic pressing structure includes a connecting column 51, an electromagnet 52, and a magnetic metal 53; the connecting column 51 is positioned above the diaphragm 2, two ends of the connecting column 51 are fixedly connected with the inner walls of two sides of the oil storage tank 1 respectively, the electromagnet 52 is hinged to the connecting column 51, the magnetic metal 53 is positioned below the diaphragm 2 and corresponds to the electromagnet 52 in the vertical direction, two ends of the magnetic metal 53 are fixedly connected with the inner walls of two sides of the oil storage tank 1 respectively, preferably, the number of the connecting columns 51 and the number of the electromagnets 51 are two, and the hinged parts of the electromagnet 52 are far away from each other; through the arrangement of the technical scheme, under the normal condition, the electromagnet 52 is electrified to generate magnetic force, is attracted with the magnetic metal 53 and respectively clamps the upper surface and the lower surface of the diaphragm 2, and the force exerted on the diaphragm 2 by the electromagnet and the magnetic metal causes the clamped part of the diaphragm 2 to deform and extrude, so that the flexible opening 3 is closed more tightly, and the diaphragm 2 can bear the pressure change in the storage space 4 through deformation within a controllable certain degree; when the pressure in the storage space 4 is excessively changed, the electromagnet 52 is powered off and loses magnetic force, and the flexible opening 3 is opened to discharge excessive transformer oil or internal gas.
In order to facilitate the passing of the transformer oil, it is preferable that the electromagnet 52 is provided with a plurality of first flow channels 61, and the magnetic metal 53 is provided with a plurality of second flow channels 62 penetrating vertically.
Preferably, the first flow channels 61 and the second flow channels 62 are arranged alternately in the horizontal direction; through the arrangement, the situation that clamping force is lacked at a certain position in the clamping process of the magnetic metal 53 and the electromagnet 52 to the diaphragm 2 is avoided while the transformer oil is ensured to pass through.
In order to prevent the flexible opening 3 from being pulled and opened due to the deformation of the diaphragm 2 on the two sides of the electromagnetic compression structure, preferably, a stop 7 is arranged on the lower surface of the electromagnet 52, a slot is arranged on the upper surface of the diaphragm 2, and the stop 7 is matched with the slot; through the arrangement of the technical scheme, the pulling on the flexible opening 3, which is generated when the diaphragm 2 on the two sides of the electromagnetic compaction structure expands due to the increase of the pressure in the storage space 4, is stopped by the stop 7, and meanwhile, the pulling force is exerted on the stop 7, so that the electromagnet is given downward force, and the pressure of the electromagnet 52 on the diaphragm 2 is increased; under the action of the two aspects, the closing of the flexible opening 3 is more stable and tight.
In order to detect the pressure in the storage space 4, preferably, the pressure detecting structure includes a mounting arm 81 and a microswitch 82, the mounting arm 81 is fixedly connected with the upper surface of the electromagnet 52, the mounting arm 81 extends towards the connecting column 51, and the microswitch 82 is fixedly connected with the lower surface of the mounting arm 81 at the end far away from the electromagnet 52; the specific working principle is as follows: the diaphragms 2 on the two sides of the electromagnetic compaction structure expand due to the increase of the pressure in the storage space 4, so that the diaphragms 2 gradually approach the micro switch 82, when the pressure of gas reaches a certain value, the micro switch 82 triggers the diaphragms 2, so that signals are transmitted to power off the electromagnet 52, the pressure on the flexible opening 4 is released, and the pressure in the storage space 4 is released; preferably, the microswitch 82 is a long-press type switch, when the microswitch 82 is pressed, the electromagnet is powered off 52, and when the microswitch 82 is not pressed, the electromagnet 52 is powered on to generate magnetic force, and the arrangement can enable the control of the pressure in the storage space 4 to be more accurate: when the flexible opening 4 is opened, the diaphragm 2 on the two sides of the electromagnetic compression structure is gradually changed from an expansion state to a contraction state along with the release of the pressure in the storage space 4, but the micro switch 82 is still in contact with the diaphragm 2 at the moment, because the pressure impacts to push the flexible opening 4, the electromagnet 52 is pushed open at the same time, the electromagnet 52 and the mounting arm 81 rotate around the connecting column 51, and the micro switch 82 is abutted to the diaphragm 2; when the pressure is reduced to a certain degree, the micro switch 82 is separated from the diaphragm 2, the electromagnet 82 is electrified, and the flexible opening 4 is closed again.
In order to enable the expansion condition of the diaphragm 2 to be sensed from multiple places to provide a more accurate signal, in a preferred case, the micro switches 82 are arranged in a plurality, the linkage plates 83 are connected to the lower surfaces of the micro switches 82, preferably, the micro switches 82 are arranged in 3, and the micro switches 82 are connected in parallel with each other.
As a further supplementary note, the balanced pressure conserver further comprises a controller electrically connected to the electromagnetic compacting structure and the microswitch 82, preferably the controller comprises a PLC programmable controller.
In order to make the flexible opening 3 fit more closely in a clamped state, the longitudinal section of the gap of the contact surface of the flexible opening 3 is preferably in a square wave shape; the material of the diaphragm 2 is silica gel.
The invention provides a transformer which comprises the balanced pressure conservator.
According to the invention, the deformation degree of the diaphragm 2 is detected by the pressure detection structure to be used as a signal, and the flexible opening 3 is opened and closed by the electromagnetic compression structure, so that the opening and closing of the flexible opening 3 are accurately controlled, the transformer oil in the storage space 4 can always work under the pressure of a stable point, and the heat dissipation capability of the transformer is further ensured.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (8)
1. A pressure-balancing conservator is characterized by comprising an oil storage tank (1), a diaphragm (2), a flexible opening (3), an electromagnetic compression structure and a pressure detection structure; the oil storage tank (1) is of a hollow structure with an upward opening, the periphery of the diaphragm (2) is connected with the inner wall of the oil storage tank (1), and a storage space (4) for storing transformer oil is formed between the diaphragm (2) and the oil storage tank (1); the flexible opening (3) is arranged on the diaphragm (2), two sides of the electromagnetic compaction structure are fixedly connected with inner walls of two sides of the oil storage tank (1), the electromagnetic compaction structure can clamp the upper surface and the lower surface of the flexible opening (3), the pressure detection structure is electrically connected with the electromagnetic compaction structure, and the pressure detection structure can be in contact with the diaphragm (2) deformed due to pressure;
the electromagnetic compaction structure comprises a connecting column (51), an electromagnet (52) and magnetic metal (53); the connecting column (51) is positioned above the diaphragm (2), two ends of the connecting column (51) are fixedly connected with the inner walls of two sides of the oil storage tank (1) respectively, the electromagnet (52) is hinged with the connecting column (51), the magnetic metal (53) is positioned below the diaphragm (2) and corresponds to the electromagnet (52) in the vertical direction, and two ends of the magnetic metal (53) are fixedly connected with the inner walls of two sides of the oil storage tank (1) respectively;
pressure detection structure includes installation arm (81) and micro-gap switch (82), installation arm (81) with the last fixed surface of electro-magnet (52) is connected, installation arm (81) to spliced pole (51) direction extends, micro-gap switch (82) with installation arm (81) is kept away from electro-magnet (52) one end lower fixed surface is connected.
2. The balanced pressure conservator as claimed in claim 1, wherein the electromagnet (52) is provided with a plurality of first flow passages (61), and the magnetic metal (53) is provided with a plurality of second flow passages (62) which are through up and down.
3. The balanced pressure conserver as claimed in claim 2, wherein the first flow passage (61) and the second flow passage (62) are staggered in horizontal direction.
4. The balanced pressure conservator as claimed in claim 1, wherein the lower surface of the electromagnet (52) is provided with a stop (7), the upper surface of the diaphragm (2) is provided with a slot, and the stop (7) is adapted to the slot.
5. The balanced pressure conservator as claimed in claim 1, wherein the micro switch (82) is provided in plurality, and linkage plate (83) is connected to the lower surface of the micro switch (82).
6. The balanced pressure conserver of claim 1, further comprising a controller electrically connected to the electromagnetic compression structure and the micro switch (82).
7. A balanced pressure conservator according to claim 1, characterized in that the longitudinal section of the gap of the flexible opening (3) contact surface is square wave shaped.
8. A transformer, characterized by comprising a balanced pressure conservator according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011034691.9A CN112216478B (en) | 2020-09-27 | 2020-09-27 | Balanced pressure conservator and transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011034691.9A CN112216478B (en) | 2020-09-27 | 2020-09-27 | Balanced pressure conservator and transformer |
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| Publication Number | Publication Date |
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| CN112216478A CN112216478A (en) | 2021-01-12 |
| CN112216478B true CN112216478B (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011034691.9A Active CN112216478B (en) | 2020-09-27 | 2020-09-27 | Balanced pressure conservator and transformer |
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| CN113367186A (en) * | 2021-05-18 | 2021-09-10 | 宣葳 | Extensive applicability's crops collection storage device |
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|---|---|---|---|---|
| CN201273383Y (en) * | 2008-08-14 | 2009-07-15 | 中国农业科学院农田灌溉研究所 | Automatic pressure-adjusting and controlling valve |
| CN204966228U (en) * | 2015-08-14 | 2016-01-13 | 重庆民生变压器有限责任公司 | Diaphragm type transformer oil pillow |
| CN205244463U (en) * | 2015-12-14 | 2016-05-18 | 瑞安市天之气动元件厂 | Diaphragm solenoid valve |
| CN107919215A (en) * | 2017-11-08 | 2018-04-17 | 国家电网公司 | A kind of oil-immersed transformer |
| CN208503551U (en) * | 2018-02-08 | 2019-02-15 | 深圳垦拓流体控制有限公司 | A kind of diaphragm disconnecting prevention structure and diaphragm electromagnetic valve |
| US10578065B1 (en) * | 2018-10-30 | 2020-03-03 | Taiwan Chelic Co., Ltd. | Two-stage intake and two-stage discharge structure of electrically controlled proportional valve |
-
2020
- 2020-09-27 CN CN202011034691.9A patent/CN112216478B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201273383Y (en) * | 2008-08-14 | 2009-07-15 | 中国农业科学院农田灌溉研究所 | Automatic pressure-adjusting and controlling valve |
| CN204966228U (en) * | 2015-08-14 | 2016-01-13 | 重庆民生变压器有限责任公司 | Diaphragm type transformer oil pillow |
| CN205244463U (en) * | 2015-12-14 | 2016-05-18 | 瑞安市天之气动元件厂 | Diaphragm solenoid valve |
| CN107919215A (en) * | 2017-11-08 | 2018-04-17 | 国家电网公司 | A kind of oil-immersed transformer |
| CN208503551U (en) * | 2018-02-08 | 2019-02-15 | 深圳垦拓流体控制有限公司 | A kind of diaphragm disconnecting prevention structure and diaphragm electromagnetic valve |
| US10578065B1 (en) * | 2018-10-30 | 2020-03-03 | Taiwan Chelic Co., Ltd. | Two-stage intake and two-stage discharge structure of electrically controlled proportional valve |
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| CN112216478A (en) | 2021-01-12 |
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