CN116576280A - Multistage pressure relief device and pressure relief method suitable for on-load tap-changer - Google Patents
Multistage pressure relief device and pressure relief method suitable for on-load tap-changer Download PDFInfo
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- CN116576280A CN116576280A CN202310522954.8A CN202310522954A CN116576280A CN 116576280 A CN116576280 A CN 116576280A CN 202310522954 A CN202310522954 A CN 202310522954A CN 116576280 A CN116576280 A CN 116576280A
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- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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Abstract
The application relates to the field of pressure relief, in particular to a multistage pressure relief device and a pressure relief method suitable for an on-load tap-changer, wherein the multistage pressure relief device suitable for the on-load tap-changer comprises a drainage mechanism, the drainage mechanism comprises a current limiting cover and a drainage tube, and the drainage tube is positioned at one side of the current limiting cover; the grading pressure release mechanism comprises a primary pressure release assembly, a secondary pressure release assembly, a fixing seat and a locking assembly, wherein the secondary pressure release assembly is positioned in the primary pressure release assembly, the fixing seat is positioned on one side of the secondary pressure release assembly, the locking assembly is positioned below the primary pressure release assembly, and the primary pressure release assembly is positioned in the flow limiting cover. The drainage mechanism and the grading pressure release mechanism are matched with each other, so that the pressure release can be performed by adapting to different pressures generated by low-energy faults and high-energy faults; the pressure relief device can adapt to pressure changes with different intensities through a pressure relief method.
Description
Technical Field
The application relates to the field of pressure relief, in particular to a multistage pressure relief device and a pressure relief method suitable for an on-load tap-changer.
Background
The on-load tap-changer is a voltage regulating device which is suitable for being operated under the excitation or load of a transformer and is used for changing the tapping connection position of a transformer winding, the transformer voltage regulating needs to be switched by the on-load tap-changer, which can cause the oil quality in a switching switch oil chamber to be poor, and can greatly improve the occurrence of low-energy (partial discharge, spark discharge) or high-energy (arc discharge) faults in the switching switch oil chamber, and the two faults can lead to the pressure increase in the switching switch oil chamber, so that a pressure release valve is needed for pressure release.
The traditional pressure release valve cannot adapt to the speed of pressure change in the switching oil chamber, the pressure release valve can release the pressure in time in low-energy faults, but the opening area of the pressure release valve is insufficient in high-energy faults, so that the pressure in the switching oil chamber cannot be released in time, and the switching oil chamber is damaged; the existing pressure relief device design is not changed for different faults and cannot adapt to pressure changes with different intensities.
Aiming at the problems, a multistage pressure relief device and a pressure relief method suitable for an on-load tap-changer are provided.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The present application has been made in view of the above and/or the problems of the existing multi-stage pressure relief device and pressure relief method for an on-load tap changer that are unable to relieve pressure according to low-energy and high-energy faults and are unable to adapt to pressure changes of different intensities.
Therefore, the application aims to provide a multistage pressure relief device suitable for an on-load tap-changer, which can adapt to different pressures generated by low-energy faults and high-energy faults to relieve pressure.
In order to solve the technical problems, the application provides the following technical scheme: a multistage pressure relief device suitable for an on-load tap-changer comprises,
the drainage mechanism comprises a flow-limiting cover and a drainage tube, and the drainage tube is positioned at one side of the flow-limiting cover;
the grading pressure release mechanism comprises a primary pressure release assembly, a secondary pressure release assembly, a fixing seat and a locking assembly, wherein the secondary pressure release assembly is positioned in the primary pressure release assembly, the fixing seat is positioned on one side of the secondary pressure release assembly, the locking assembly is positioned below the primary pressure release assembly, and the primary pressure release assembly is positioned in the flow limiting cover.
As a preferred embodiment of the multi-stage pressure relief device for an on-load tap changer according to the present application, the multi-stage pressure relief device comprises: the drainage tube comprises a primary drainage tube and a secondary drainage tube, and the secondary drainage tube is positioned above the primary drainage tube.
As a preferred embodiment of the multi-stage pressure relief device for an on-load tap changer according to the present application, the multi-stage pressure relief device comprises: the first-stage pressure relief assembly comprises a first pressure relief disc, a first spring and a first fixed cover, wherein the first spring is located above the first pressure relief disc, and the first fixed cover is located above the first spring.
As a preferred embodiment of the multi-stage pressure relief device for an on-load tap changer according to the present application, the multi-stage pressure relief device comprises: the first pressure relief disc comprises a sealing ring and a second pressure relief hole, and the second pressure relief hole is positioned in the sealing ring; the first fixed cover comprises a first fixed column hole, a first spring cavity and a sliding hole, wherein the first spring cavity is positioned on one side of the first fixed column hole, and the sliding hole is positioned on one side of the first spring cavity.
As a preferred embodiment of the multi-stage pressure relief device for an on-load tap changer according to the present application, the multi-stage pressure relief device comprises: the second pressure relief assembly comprises a second pressure relief disc, a second spring and a second fixed cover, wherein the second spring is positioned above the second pressure relief disc, and the second fixed cover is positioned above the second spring.
As a preferred embodiment of the multi-stage pressure relief device for an on-load tap changer according to the present application, the multi-stage pressure relief device comprises: the second pressure relief disc comprises a pressure relief pipe, a pressure relief disc hole and a locking hole, the pressure relief disc hole is positioned on one side of the pressure relief pipe, and the locking hole is positioned on the pressure relief pipe; the second fixing cover comprises a second fixing column and a second spring cavity, and the second spring cavity is located on one side of the second fixing column.
As a preferred embodiment of the multi-stage pressure relief device for an on-load tap changer according to the present application, the multi-stage pressure relief device comprises: the fixing seat comprises a first fixing column and a primary pressure relief hole, and the primary pressure relief hole is positioned on one side of the fixing seat.
As a preferred embodiment of the multi-stage pressure relief device for an on-load tap changer according to the present application, the multi-stage pressure relief device comprises: the locking assembly comprises a lock cylinder, a clamping piece and a sliding piece, wherein the clamping piece is positioned in the lock cylinder, and the sliding piece is positioned on one side of the clamping piece.
As a preferred embodiment of the multi-stage pressure relief device for an on-load tap changer according to the present application, the multi-stage pressure relief device comprises: the lock column piece comprises a third spring, a limit column, a clamping piece groove and a first sliding piece groove, wherein the third spring is positioned in the first sliding piece groove, the limit column is positioned at one side of the clamping piece groove, and the clamping piece groove is positioned above the first sliding piece groove; the clamping piece comprises a second sliding piece groove, an inclined plane, a triangular clamping head and a clamping hole, wherein the inclined plane is positioned on one side of the second sliding piece groove, the triangular clamping head is positioned on one side of the inclined plane, and the clamping hole is positioned on the triangular clamping head; the slider comprises a limiting block and a pressing block, and the pressing block is located on one side of the limiting block.
Another object of the present application is to provide a pressure relief method that can accommodate pressure changes of different strengths.
In order to solve the technical problems, the application provides the following technical scheme: a pressure relief method, which comprises the following steps,
the pressure relief capacity of the pressure relief device is increased through multistage pressure relief;
the pressure release direction is defined by drainage.
The application has the beneficial effects that: according to the multistage pressure relief device and the pressure relief method suitable for the on-load tap-changer, the drainage mechanism and the grading pressure relief mechanism are matched with each other, so that pressure relief can be performed by adapting to different pressures generated by low-energy faults and high-energy faults; the pressure relief device can adapt to pressure changes with different intensities through a pressure relief method.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a schematic diagram of the overall structure of a multi-stage pressure relief device suitable for an on-load tap-changer;
FIG. 2 is a schematic structural view of a drainage mechanism;
FIG. 3 is a first schematic view of a staged pressure relief mechanism;
FIG. 4 is a second schematic diagram of a staged pressure relief mechanism;
FIG. 5 is a cross-sectional view of a primary pressure relief assembly;
FIG. 6 is a schematic diagram of a two-stage pressure relief assembly;
FIG. 7 is a schematic structural view of a fixing base;
FIG. 8 is a schematic structural view of a cylinder lock;
FIG. 9 is a schematic structural view of a clip;
fig. 10 is a schematic view of the structure of the slider.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1-5, a first embodiment of the present application provides a multi-stage pressure relief device for an on-load tap-changer, comprising,
the drainage mechanism 100, the drainage mechanism 100 comprises a flow-limiting cover 101 and a drainage tube 102, and the drainage tube 102 is positioned at one side of the flow-limiting cover 101;
the classifying pressure relief mechanism 200 comprises a primary pressure relief assembly 201, a secondary pressure relief assembly 202, a fixing seat 203 and a locking assembly 204, wherein the secondary pressure relief assembly 202 is positioned in the primary pressure relief assembly 201, the fixing seat 203 is positioned on one side of the secondary pressure relief assembly 202, the locking assembly 204 is positioned below the primary pressure relief assembly 201, and the primary pressure relief assembly 201 is positioned in the flow limiting cover 101.
It should be noted that the drainage tube 102 is fixed to the flow-limiting cover 101; the locking assembly 204 is fixed below the primary pressure relief assembly 201; the secondary pressure relief assembly 202 is secured above the primary pressure relief assembly 201.
Further, the draft tube 102 includes a primary draft tube 102a and a secondary draft tube 102b, the secondary draft tube 102b being located above the primary draft tube 102 a.
It should be noted that the primary drainage tube 102a is a pressure relief port of the primary pressure relief assembly 201; the secondary drain 102b is a relief port of the secondary relief assembly 202.
Preferably, the primary pressure relief assembly 201 includes a first pressure relief disc 201a, a first spring 201b and a first fixed cover 201c, the first spring 201b is located above the first pressure relief disc 201a, and the first fixed cover 201c is located above the first spring 201b; the first pressure relief disc 201a includes a sealing ring 201a-1 and a secondary pressure relief hole 201a-2, the secondary pressure relief hole 201a-2 being located in the sealing ring 201 a-1; the first fixing cover 201c includes a first fixing post hole 201c-1, a first spring chamber 201c-2 and a sliding hole 201c-3, the first spring chamber 201c-2 being located at one side of the first fixing post hole 201c-1, the sliding hole 201c-3 being located at one side of the first spring chamber 201 c-2.
It should be noted that, one end of the first spring 201b is fixed to the first pressure release disc 201a, and the other end is fixed to the first fixing cover 201 c; the secondary pressure relief hole 201a-2 is located in the center of the first pressure relief disc 201 a; the seal ring 201a-1 is annular; three first fixing column holes 201c-1 are arranged, and each first fixing column hole 201c-1 is spaced 120 degrees around the center of the first fixing cover 201 c; a first spring 201b is fixed in the first spring chamber 201 c-2; the diameter of the sliding hole 201c-3 is larger than the diameter of the secondary relief hole 201 a-2.
Example 2
Referring to fig. 1 to 10, a second embodiment of the present application is based on the previous embodiment.
Specifically, the secondary pressure relief assembly 202 includes a second pressure relief disc 202a, a second spring 202b, and a second fixed cover 202c, the second spring 202b being located above the second pressure relief disc 202a, the second fixed cover 202c being located above the second spring 202b; the second pressure relief disc 202a includes a pressure relief tube 202a-1, a pressure relief disc hole 202a-2 and a locking hole 202a-3, the pressure relief disc hole 202a-2 is located at one side of the pressure relief tube 202a-1, and the locking hole 202a-3 is located on the pressure relief tube 202 a-1; the second stationary cover 202c includes a second stationary post 202c-1 and a second spring cavity 202c-2, the second spring cavity 202c-2 being located on one side of the second stationary post 202 c-1.
It should be noted that, one end of the second spring 202b is fixed to the second pressure release disc 202a, and one end is fixed to the second fixed cover 202 c; the length of the pressure relief tube 202a-1 is longer than the second spring 202b; the height of the relief disc orifice 202a-2 is greater than the diameter of the secondary drain tube 102 b; the second fixing post 202c-1 is fixed on the first fixing cover 201 c; the inner diameter of the second spring cavity 202c-2 matches the outer diameter of the second spring 202b; the pressure of the second spring 202b is much smaller than the pressure of the first spring 201 b.
Further, the fixing base 203 includes a first fixing post 203a and a first pressure relief hole 203b, and the first pressure relief hole 203b is located at one side of the fixing base 203.
It should be noted that the first fixing post 203a integrally fixes the first fixing cover 201c to the fixing base 203 through the first fixing post hole 201 c-1; the diameter of the primary relief hole 203b is smaller than the diameter of the first relief disc 201 a.
Preferably, the locking assembly 204 includes a lock cylinder 204a, a clip 204b and a slider 204c, wherein the clip 204b is located in the lock cylinder 204a, and the slider 204c is located on one side of the clip 204 b; the lock cylinder 204a comprises a third spring 204a-1, a limit cylinder 204a-2, a clamping piece groove 204a-3 and a first sliding piece groove 204a-4, wherein the third spring 204a-1 is positioned in the first sliding piece groove 204a-4, the limit cylinder 204a-2 is positioned on one side of the clamping piece groove 204a-3, and the clamping piece groove 204a-3 is positioned above the first sliding piece groove 204 a-4; the clamping piece 204b comprises a second sliding piece groove 204b-1, an inclined plane 204b-2, a triangular clamping head 204b-3 and a clamping hole 204b-4, wherein the inclined plane 204b-2 is positioned on one side of the second sliding piece groove 204b-1, the triangular clamping head 204b-3 is positioned on one side of the inclined plane 204b-2, and the clamping hole 204b-4 is positioned on the triangular clamping head 204 b-3; slider 204c includes a stopper 204c-1 and a press block 204c-2, press block 204c-2 being located on one side of stopper 204 c-1.
It should be noted that the sliding connection between the lock cylinder 204a, the clip 204b and the slider 204 c; one end of the third spring 204a-1 is fixed in the first slider groove 204a-4, and the other end is fixed on the slider 204 c; the size of the limit column 204a-2 is matched with the clamping hole 204 b-4; the clamping piece groove 204a-3 is in sliding connection with the clamping piece 204 b; the first slider groove 204a-4 is slidably connected to the stopper 204 c-1; the second slider groove 204b-1 is slidably connected with the stopper 204 c-1; triangle clip 204b-3 is a triangle cylinder; the inclined surface 204b-2 extends smoothly from the second slider groove 204b-1 to a position deviated from the triangular clamping head 204b-3, and the included angle between the inclined surface 204b-2 and the second slider groove 204b-1 is 210 degrees to 240 degrees; the width of the stopper 204c-1 is wider than the press block 204c-2.
In this embodiment, when a low-energy fault occurs in the switching oil chamber, the pressure in the switching oil chamber is slowly increased, the increased pressure can make the first pressure release disc 201a press the first spring 201b, and when the pressure of the first pressure release disc 201a to the first spring 201b is greater than the force generated by the distance that the first spring 201b moves the sealing ring 201a-1, the sealing ring 201a-1 can not seal the switching oil chamber any more, and at this time, the oil in the switching oil chamber can be sprayed out from between the first pressure release disc 201a and the fixing seat 203 and is drained to an external designated direction through the primary drainage tube 102 a.
It should be noted that, when a high-energy fault occurs in the switching oil chamber, the pressure in the switching oil chamber is extremely fast raised, the raised pressure can fast lift up the first pressure relief disc 201a, when the first pressure relief disc 201a is raised to a certain height, the inner hole wall of the first stage pressure relief hole 203b can press the pressing block 204c-2, so that the sliding piece 204c presses the third spring 204a-1 and slides to the bottom of the first sliding piece groove 204a-4 along the second sliding piece groove 204b-1 and the first sliding piece groove 204a-4, and at this time, the blocking piece 204b loses the blocking of the sliding piece 204c as a whole and can slide; because the pressure in the switching oil chamber is far greater than the external air pressure, the second pressure relief disc 202a has a tendency to slide upwards as a whole, after the clamping piece 204b can slide, the pressure of the second pressure relief disc 202a to the clamping piece 204b can squeeze the triangular clamping head 204b-3, so that the triangular clamping head 204b-3 is squeezed out of the locking hole 202a-3, after that, the second pressure relief disc 202a slides upwards, the pressure relief disc hole 202a-2 can be aligned with the secondary drainage tube 102b, and at the moment, the oil in the switching oil chamber can be sprayed out from the pressure relief disc hole 202a-2 and drained to the external appointed direction through the secondary drainage tube 102b, and the pressure relief drainage is carried out together with the primary drainage tube 102 a.
It should be noted that, when the high-energy fault is relieved to a certain extent, the first pressure relief disc 201a will reset under the extrusion of the first spring 201b, at this time, the inner hole wall of the first pressure relief hole 203b will not extrude the pressing block 204c-2 any more, the slider 204c will slide upwards under the elasticity of the third spring 204a-1, and give a certain pressure to the inclined plane 204 b-2; when the high-energy fault is relieved further, the second pressure relief disc 202a is reset under the extrusion of the second spring 202b, after the second pressure relief disc 202a is reset, the cam clip 204b-3 is clamped into the locking hole 202a-3 again under the extrusion of the slider 204c, and after that, the slider 204c is lifted continuously and slides into the second slider groove 204b-1, so that the locking of the clamping piece 204b is completed.
Example 3
Referring to fig. 1 to 10, a third embodiment of the present application provides a pressure relief method, which includes a multi-stage pressure relief device suitable for an on-load tap changer.
Specifically, the pressure relief capacity of the pressure relief device is increased through multistage pressure relief; the pressure release direction is defined by drainage.
It should be noted that the multi-stage pressure relief can generate different pressure relief speeds and amounts according to different pressure conditions in the container; the pressure relief direction is limited by drainage to prevent oil from being sprayed to other important instruments.
It is important to note that the construction and arrangement of the present application shown in the various exemplary embodiments is illustrative only, and that although only a few embodiments have been described in detail in this disclosure, persons having reference to this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, as well as values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.), for example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of the elements may be reversed or otherwise varied, and the nature or number or position of the discrete elements may be altered or varied without substantially departing from the novel teachings and advantages of the subject matter described in this application. Accordingly, it is intended that all such variations are included within the scope of the application, that the order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments, and that in the claims any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present application, and therefore, the present application is not limited to the specific embodiments but extends to many modifications which still fall within the scope of the appended claims.
Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the application, or those not associated with practicing the application).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.
Claims (10)
1. Multistage pressure relief device suitable for on-load tap-changer, its characterized in that: comprising the steps of (a) a step of,
the drainage mechanism (100), the drainage mechanism (100) comprises a flow limiting cover (101) and a drainage tube (102), and the drainage tube (102) is positioned at one side of the flow limiting cover (101);
the grading pressure release mechanism (200), grading pressure release mechanism (200) include one-level pressure release subassembly (201), second grade pressure release subassembly (202), fixing base (203) and locking subassembly (204), second grade pressure release subassembly (202) are arranged in one-level pressure release subassembly (201), fixing base (203) are arranged in one side of second grade pressure release subassembly (202), locking subassembly (204) are arranged below one-level pressure release subassembly (201), one-level pressure release subassembly (201) are arranged in restriction lid (101).
2. The multi-stage pressure relief device for an on-load tap changer of claim 1, wherein: the drainage tube (102) comprises a primary drainage tube (102 a) and a secondary drainage tube (102 b), and the secondary drainage tube (102 b) is located above the primary drainage tube (102 a).
3. The multi-stage pressure relief device for an on-load tap changer according to claim 1 or 2, wherein: the primary pressure relief assembly (201) comprises a first pressure relief disc (201 a), a first spring (201 b) and a first fixed cover (201 c), wherein the first spring (201 b) is located above the first pressure relief disc (201 a), and the first fixed cover (201 c) is located above the first spring (201 b).
4. A multi-stage pressure relief device for an on-load tap-changer as claimed in claim 3 wherein: the first pressure relief disc (201 a) comprises a sealing ring (201 a-1) and a secondary pressure relief hole (201 a-2), and the secondary pressure relief hole (201 a-2) is positioned in the sealing ring (201 a-1);
the first fixed cover (201 c) comprises a first fixed column hole (201 c-1), a first spring cavity (201 c-2) and a sliding hole (201 c-3), wherein the first spring cavity (201 c-2) is located on one side of the first fixed column hole (201 c-1), and the sliding hole (201 c-3) is located on one side of the first spring cavity (201 c-2).
5. The multi-stage pressure relief device for an on-load tap changer of claim 4, wherein: the secondary pressure relief assembly (202) includes a second pressure relief disc (202 a), a second spring (202 b) and a second fixed cover (202 c), the second spring (202 b) being located above the second pressure relief disc (202 a), the second fixed cover (202 c) being located above the second spring (202 b).
6. The multi-stage pressure relief device for an on-load tap changer of claim 5, wherein: the second pressure relief disc (202 a) comprises a pressure relief pipe (202 a-1), a pressure relief disc hole (202 a-2) and a locking hole (202 a-3), the pressure relief disc hole (202 a-2) is positioned on one side of the pressure relief pipe (202 a-1), and the locking hole (202 a-3) is positioned on the pressure relief pipe (202 a-1);
the second fixed cover (202 c) comprises a second fixed column (202 c-1) and a second spring cavity (202 c-2), and the second spring cavity (202 c-2) is positioned on one side of the second fixed column (202 c-1).
7. The multi-stage pressure relief device for an on-load tap changer of claim 6, wherein: the fixing seat (203) comprises a first fixing column (203 a) and a primary pressure relief hole (203 b), and the primary pressure relief hole (203 b) is located on one side of the fixing seat (203).
8. The multi-stage pressure relief device for an on-load tap changer of claim 7, wherein: the locking assembly (204) comprises a lock cylinder (204 a), a clamping piece (204 b) and a sliding piece (204 c), wherein the clamping piece (204 b) is located in the lock cylinder (204 a), and the sliding piece (204 c) is located on one side of the clamping piece (204 b).
9. The multi-stage pressure relief device for an on-load tap changer of claim 8, wherein: the lock cylinder (204 a) comprises a third spring (204 a-1), a limit cylinder (204 a-2), a clamping piece groove (204 a-3) and a first sliding piece groove (204 a-4), wherein the third spring (204 a-1) is positioned in the first sliding piece groove (204 a-4), the limit cylinder (204 a-2) is positioned on one side of the clamping piece groove (204 a-3), and the clamping piece groove (204 a-3) is positioned above the first sliding piece groove (204 a-4);
the clamping piece (204 b) comprises a second slider groove (204 b-1), an inclined plane (204 b-2), a triangular clamping head (204 b-3) and a clamping hole (204 b-4), wherein the inclined plane (204 b-2) is positioned at one side of the second slider groove (204 b-1), the triangular clamping head (204 b-3) is positioned at one side of the inclined plane (204 b-2), and the clamping hole (204 b-4) is positioned on the triangular clamping head (204 b-3);
the slider (204 c) comprises a limiting block (204 c-1) and a pressing block (204 c-2), wherein the pressing block (204 c-2) is positioned on one side of the limiting block (204 c-1).
10. The pressure relief method is characterized in that: a multistage pressure relief device comprising a tap changer according to any one of claims 1 to 9, further comprising
The pressure relief capacity of the pressure relief device is increased through multistage pressure relief;
the pressure release direction is defined by drainage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310522954.8A CN116576280A (en) | 2023-05-10 | 2023-05-10 | Multistage pressure relief device and pressure relief method suitable for on-load tap-changer |
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| CN202310522954.8A CN116576280A (en) | 2023-05-10 | 2023-05-10 | Multistage pressure relief device and pressure relief method suitable for on-load tap-changer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2341521Y (en) * | 1998-11-03 | 1999-10-06 | 徐连水 | Safety valve |
| US20050133094A1 (en) * | 2003-12-19 | 2005-06-23 | Qualitrol Corporation | Enclosure system for pressure relief device |
| US20110220829A1 (en) * | 2008-12-03 | 2011-09-15 | Maschinenfabrik Reinhausen Gmbh | Pressure relief valve |
| CN110529638A (en) * | 2019-08-20 | 2019-12-03 | 王美娟 | A kind of two-stage pressure release direct-acting overflow valve |
| CN114420417A (en) * | 2022-01-29 | 2022-04-29 | 西安西变组件有限公司 | Pressure release device |
| CN115899336A (en) * | 2022-10-12 | 2023-04-04 | 西安西变组件有限公司 | Pressure release device and pressure vessel |
| CN116386991A (en) * | 2023-05-10 | 2023-07-04 | 上海交通大学 | Quick pressure relief oil tank capable of being embedded into on-load tap-changer and oil tank design method |
-
2023
- 2023-05-10 CN CN202310522954.8A patent/CN116576280A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2341521Y (en) * | 1998-11-03 | 1999-10-06 | 徐连水 | Safety valve |
| US20050133094A1 (en) * | 2003-12-19 | 2005-06-23 | Qualitrol Corporation | Enclosure system for pressure relief device |
| US20110220829A1 (en) * | 2008-12-03 | 2011-09-15 | Maschinenfabrik Reinhausen Gmbh | Pressure relief valve |
| CN110529638A (en) * | 2019-08-20 | 2019-12-03 | 王美娟 | A kind of two-stage pressure release direct-acting overflow valve |
| CN114420417A (en) * | 2022-01-29 | 2022-04-29 | 西安西变组件有限公司 | Pressure release device |
| CN115899336A (en) * | 2022-10-12 | 2023-04-04 | 西安西变组件有限公司 | Pressure release device and pressure vessel |
| CN116386991A (en) * | 2023-05-10 | 2023-07-04 | 上海交通大学 | Quick pressure relief oil tank capable of being embedded into on-load tap-changer and oil tank design method |
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