CN114420417A - Pressure release device - Google Patents
Pressure release device Download PDFInfo
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- CN114420417A CN114420417A CN202210111473.3A CN202210111473A CN114420417A CN 114420417 A CN114420417 A CN 114420417A CN 202210111473 A CN202210111473 A CN 202210111473A CN 114420417 A CN114420417 A CN 114420417A
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- China
- Prior art keywords
- pressure
- pressure relief
- channel
- limiting piece
- base
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a pressure release device. Arranging the base and the shell in the pressure relief bin, and arranging the base below the pressure relief bin; a channel is arranged along the vertical direction of the base and is communicated with the pressure relief bin; the flow limiting piece is movably arranged at the liquid outlet of the channel through the elastic piece, and then elastic restoring force is provided for the flow limiting piece through the elastic piece, so that when the oil pressure of the flow limiting piece in the channel is smaller than a preset value, the oil can be limited from entering the pressure relief bin from the channel; and when the oil hydraulic pressure in the passageway was greater than the default, fluid can upwards be backed down the current-limiting piece, and then made fluid flow pressure release storehouse from the passageway, if the pressure of the fluid in the passageway is very big with the default pressure differential of fluid, then can make the current-limiting piece upwards open fast, and then can make fluid get into the pressure release storehouse fast and carry out the pressure release, avoid transformer tank to damage.
Description
Technical Field
The invention relates to the field of transformers, in particular to a pressure release device.
Background
In order to avoid an accident caused by excessive oil pressure of an oil-immersed transformer, a pressure relief valve is generally installed at the top of an oil tank of the transformer.
However, the pressure relief speed of the conventional pressure relief valve is too low after the short-circuit fault of the transformer, so that the transformer cannot be effectively protected, and particularly, on a high-capacity extra-high voltage transformer product, if the pressure cannot be effectively relieved after the short-circuit fault occurs, the oil tank of the transformer is easy to crack.
Disclosure of Invention
In view of this, an embodiment of the present invention provides a pressure relief device to solve the problem that a pressure relief valve of an existing transformer cannot be quickly relieved when the transformer has a short-circuit fault.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
the invention discloses a pressure release device and an oil-immersed transformer in a first aspect, comprising: the pressure relief device comprises a shell, a base, a pressure relief bin, a flow limiting piece and an elastic piece;
the base and the shell are both arranged in the pressure relief bin, and the base is positioned below the pressure relief bin;
a channel is arranged along the vertical direction of the base and is communicated with the pressure relief bin;
the flow limiting piece is movably arranged at the liquid outlet of the channel through an elastic piece, and the elastic piece is used for providing elastic restoring force for the flow limiting piece;
the flow limiting piece can limit oil to enter the pressure relief bin from the channel when the oil pressure in the channel is smaller than a preset value.
Preferably, the elastic member is a spring.
Preferably, the method further comprises the following steps: a pressure plate and a plurality of pull rods;
the pull rod is vertically arranged on the shell, and one end of the pull rod is fixed on the base;
the pressure plate is movably arranged on the pull rod;
the spring is vertically arranged between the pressure plate and the base;
one end of the spring is fixed with the current-limiting piece, and the other end of the spring is fixed with the pressure plate.
Preferably, the pull rods are uniformly arranged along the circumferential direction of the channel.
Preferably, the flow restriction is a streamlined membrane disc.
Preferably, the channel is a circular channel, and the circle center of the streamline membrane disc is superposed with the central line of the channel.
Preferably, the method further comprises the following steps: an indicating device;
the indicating device comprises a signal rod and a microswitch;
the microswitch is arranged at the top of the pressure relief bin;
the signal rod is movably arranged in the shell, and the first end of the signal rod is connected with the current limiting piece;
the current-limiting piece can drive the signal rod to move upwards when the oil pressure of the channel is greater than a preset value, so that the second end of the signal rod is in contact with the microswitch.
From the foregoing, it can be seen that a pressure relief device is disclosed. Arranging the base and the shell in the pressure relief bin, and arranging the base below the pressure relief bin; a channel is arranged along the vertical direction of the base and is communicated with the pressure relief bin; the flow limiting piece is movably arranged at the liquid outlet of the channel through the elastic piece, and then elastic restoring force is provided for the flow limiting piece through the elastic piece, so that when the oil pressure of the flow limiting piece in the channel is smaller than a preset value, the oil can be limited from entering the pressure relief bin from the channel; and when the oil hydraulic pressure in the passageway was greater than the default, fluid can upwards be backed down the current-limiting piece, and then made fluid flow pressure release storehouse from the passageway, if the pressure of the fluid in the passageway is very big with the default pressure differential of fluid, then can make the current-limiting piece upwards open fast, and then can make fluid get into the pressure release storehouse fast and carry out the pressure release, avoid transformer tank to damage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pressure relief device according to an embodiment of the present invention.
The pressure relief device comprises a base 1, a channel 11, a flow limiting piece 2, an elastic piece 3, a signal rod 41, a microswitch 42, a shell 5, a pressure plate 6, a pull rod 7 and a pressure relief bin 8.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
An embodiment of the present invention provides a pressure release device, and referring to fig. 1, fig. 1 is a schematic structural diagram of the pressure release device, where the pressure release device includes: the pressure relief device comprises a pressure relief bin 8, a base 1, a shell 5, a flow limiting piece 2 and an elastic piece 3;
the base 1 and the shell 5 are both arranged in the pressure relief bin 8, and the base 1 is positioned below the pressure relief bin 8;
a channel 11 is arranged along the vertical direction of the base 1, and the channel 11 is communicated with the pressure relief bin 8;
the flow limiting piece 2 is movably arranged at the liquid outlet of the channel 11 through an elastic piece 3, and the elastic piece 3 is used for providing elastic restoring force for the flow limiting piece 2;
the flow limiting piece 2 can limit oil from entering the pressure relief bin 8 from the channel 11 when the oil pressure in the channel 11 is smaller than a preset value.
It should be noted that, the preset value of the present application is the elastic restoring force provided by the elastic member 3, the bases 1 and 5 are both disposed in the pressure relief bin 8, and the base 1 is disposed below the pressure relief bin 8; a channel 11 is arranged along the vertical direction of the base 1, and the channel 11 is communicated with the pressure relief bin 8; the flow limiting piece 2 is movably arranged at a liquid outlet of the channel 11 through the elastic piece 3, and then elastic restoring force is provided for the flow limiting piece 2 through the elastic piece 3, so that when the oil pressure of the flow limiting piece 2 in the channel 11 is smaller than a preset value, oil can be limited from entering the pressure relief bin 8 from the channel 11; and when the pressure of the oil liquid in the channel 11 is greater than the preset value, oil liquid can upwards jack the flow limiting piece 2, so that the oil liquid can flow into the pressure relief bin 8 from the channel 11, if the pressure of the oil liquid in the channel 11 is very large with the pressure difference of the preset value of the oil liquid, the flow limiting piece 2 can be quickly upwards opened, and then the oil liquid can quickly enter the pressure relief bin 8 to be decompressed, and the transformer oil tank is prevented from being damaged.
It is worth noting that, because this application makes flow restriction piece 2 seal channel 11 through the elastic restoring force that elastic component 3 provided, consequently, when the oil pressure power in channel 11 slightly was greater than the elastic restoring force that elastic component 3 provided, elastic component 3 can only slight rebound, and then can make fluid slowly get into pressure release storehouse 5 from channel 11, and when the oil pressure power in channel 11 was far greater than the elastic restoring force that elastic component 3 provided, flow restriction piece 2 can be opened fast, and then make fluid can get into pressure release storehouse 8 from channel 11 fast, and then realize quick pressure release.
Specifically, the elastic member 3 is a spring.
The elastic member 3 may be a spring, or may be another component having an elastic restoring force.
Further, the pressure relief device further comprises: a pressure plate 6 and a plurality of tie rods 7;
the pull rod 7 is vertically arranged on the shell 5, and one end of the pull rod 7 is fixed on the base 1;
the pressure plate 6 is movably arranged on the pull rod 7;
the spring is vertically arranged between the pressure plate 6 and the base 1;
one end of the spring is fixed with the flow limiting piece 2, and the other end of the spring is fixed with the pressure plate 6.
It should be noted that, by arranging the pressure plate 6 and the plurality of pull rods 7, vertically arranging the pull rods 7 on the housing 5, fixing one end of each pull rod 7 on the base 1, movably arranging the pressure plate 6 on the pull rods 7, vertically arranging the springs between the pressure plate 6 and the base 1, and adjusting the elastic restoring force of the springs on the flow limiting members 2 by adjusting the positions of the pressure plate 6 on the pull rods 7, i.e., adjusting different preset values.
Specifically, the plurality of tie rods 7 are uniformly arranged along the circumferential direction of the channel 11.
It should be noted that, evenly set up a plurality of pull rods 7 along 11 circumference of passageway, can guarantee that pressure disk 6 can firmly install for the elastic restoring force that pressure disk 6 received can evenly distributed with every pull rod 7's fixed position, and then avoid pressing to produce the dish deformation.
In particular, the flow restriction 2 is a streamlined membrane disc.
It should be noted that, the flow limiting piece 2 is set as a streamline membrane disc, so that when the flow limiting piece 2 is sealed, namely when the oil pressure in the pipeline is smaller than a preset value, the sealing effect of the flow limiting piece 2 is improved, and the oil in the pipeline is prevented from entering the pressure relief bin 8.
It should also be noted that the flow restriction 2 may be a streamlined membrane disc, or may be other sealing member having a sealing function for sealing the pipe.
Specifically, the passage 11 is a circular passage 11, and the center of the streamline membrane disc coincides with the center line of the passage 11.
The passage 11 may be a circular passage 11, or may be a passage 11 having another shape, and therefore, the shape of the passage 11 is not limited to a circular shape.
It should be further noted that the center line of the circular channel 11 and the circle center of the streamline membrane disk are set to be coincident, so that when the oil pressure in the circular channel 11 is greater than a preset value, the streamline membrane disk can be stressed more uniformly, the streamline membrane disk can be guaranteed to move upwards as a whole, and when the oil pressure in the channel 11 is less than the preset value, the streamline membrane disk can be in close contact with the outlet of the channel 11, and the sealing effect of the streamline membrane disk on the channel 11 is guaranteed.
Further, the pressure relief device further comprises: an indicating device;
the indicating device comprises a signal rod 41 and a microswitch 42;
the microswitch 42 is arranged at the top of the pressure relief bin 8;
the signal rod 41 is movably arranged in the shell 5, and a first end of the signal rod 41 is connected with the current limiting piece 2;
the flow restriction member 2 can drive the signal rod 41 to move upward when the oil pressure of the passage 11 is greater than a preset value, so that the second end of the signal rod 41 contacts with the microswitch 42.
It should be noted that, by setting the indicating device, and setting the micro switch 42 of the indicating device at the top of the pressure relief bin 8, the signal rod 41 of the indicating device can be movably disposed in the housing 5, and the first end of the signal rod 41 is connected to the current limiting member 2, so that the current limiting member 2 can drive the signal rod 41 to move upward when the oil pressure of the channel 11 is greater than the preset value, and the second end of the signal rod 41 contacts with the micro switch 42, so that the micro switch 42 acts, and the worker can conveniently determine the oil pressure in the current pipeline through the micro switch 42.
To facilitate understanding of the above solution, the solution is further described below with reference to fig. 1.
The pressure release device comprises a base 1, a streamline membrane disc 2, a spring 3, an indicating device, a shell 5, a pressure disc 6, a pull rod 7, a pressure release bin 8 and the like. The streamline membrane disc 2 realizes the sealing with the base 1 under the pre-pressure of the spring 3. The pressure release device is applied to the top surface of a transformer oil tank, when the pressure of the transformer oil tank is increased and exceeds the pre-pressure limit value of a spring, the streamline membrane disc 2 loses the stable state under the action of pressure, is opened upwards quickly, enables oil to be sprayed out quickly, and conducts flow outwards through the pressure relief bin, and when the pressure inside the oil tank is lower than the pressure of the spring, the pressure release device resets.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A pressure relief device, comprising: the pressure relief device comprises a shell, a base, a pressure relief bin, a flow limiting piece and an elastic piece;
the base and the shell are both arranged in the pressure relief bin, and the base is positioned below the pressure relief bin;
a channel is formed in the vertical direction of the base and is communicated with the pressure relief bin;
the flow limiting piece is movably arranged at the liquid outlet of the channel through the elastic piece, and the elastic piece is used for providing elastic restoring force for the flow limiting piece;
the flow limiting piece can limit oil from entering the pressure relief bin from the channel when the oil pressure in the channel is smaller than a preset value.
2. The pressure relief device of claim 1, wherein the resilient member is a spring.
3. The pressure relief device of claim 2, further comprising: a pressure plate and a plurality of pull rods;
the pull rod is vertically arranged on the shell, and one end of the pull rod is fixed on the base;
the pressure plate is arranged on the pull rod;
the spring is vertically arranged between the pressure plate and the base;
one end of the spring is fixed with the flow limiting piece, and the other end of the spring is fixed with the pressure plate.
4. The pressure relief device of claim 3, wherein a plurality of the tie rods are evenly circumferentially disposed along the channel.
5. The pressure relief device of claim 1, wherein the flow restrictor is a streamlined membrane disc.
6. The pressure relief device of claim 5, wherein the channel is a circular channel, and the center of the streamlined membrane disk coincides with the center line of the channel.
7. The pressure relief device of claim 1, further comprising: an indicating device;
the indicating device comprises a signal rod and a microswitch;
the microswitch is arranged at the top of the pressure relief bin;
the signal rod is movably arranged in the shell, and the first end of the signal rod is connected with the current limiting piece;
the flow limiting piece can drive the signal rod to move upwards when the oil pressure of the channel is larger than a preset value, so that the second end of the signal rod is in contact with the microswitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210111473.3A CN114420417A (en) | 2022-01-29 | 2022-01-29 | Pressure release device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210111473.3A CN114420417A (en) | 2022-01-29 | 2022-01-29 | Pressure release device |
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| Publication Number | Publication Date |
|---|---|
| CN114420417A true CN114420417A (en) | 2022-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210111473.3A Pending CN114420417A (en) | 2022-01-29 | 2022-01-29 | Pressure release device |
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| Country | Link |
|---|---|
| CN (1) | CN114420417A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116576280A (en) * | 2023-05-10 | 2023-08-11 | 上海交通大学 | Multistage pressure relief device and pressure relief method suitable for on-load tap-changer |
-
2022
- 2022-01-29 CN CN202210111473.3A patent/CN114420417A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116576280A (en) * | 2023-05-10 | 2023-08-11 | 上海交通大学 | Multistage pressure relief device and pressure relief method suitable for on-load tap-changer |
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