Oil tank cover of oil-immersed transformer
By introducing a movable plate and a pressure relief mechanism into the oil tank cover of the oil-immersed transformer, the safety hazards caused by oil expansion and temperature changes are solved, and the safe pressure relief and sealing protection of the transformer are achieved.
Patent Information
- Application Number
- CN202520093316.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-15
AI Technical Summary
The existing oil-immersed transformer tank cover lacks a pressure relief structure, which poses a safety hazard when the oil expands and the temperature changes.
An oil-immersed transformer tank cover was designed, comprising a fixed cover, a movable plate, a limiting block, an exhaust groove, and a pressure relief mechanism. The internal pressure is automatically released through the exhaust groove and pressure relief hole, and the tank automatically closes after the air pressure is balanced to prevent the sealing performance from being affected.
It enables safe pressure relief of oil-immersed transformers when the pressure is too high, prevents oil leakage, and ensures the sealing and safety of the transformer's interior.
Smart Images
Figure CN223911495U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oil tank cover technical field, concretely is a kind of oil-immersed transformer oil tank cover. BACKGROUND
[0002] In the late 19th century, transformer began to use transformer oil as insulation and cooling medium, oil-immersed transformer appeared, in addition to natural storage quantity abundant, low price, transformer oil is widely used due to its multiple excellent properties.
[0003] The oil tank cover is usually arranged above the opening of the oil tank, and a gasket is arranged between the oil tank cover and the opening to ensure the airtightness of the oil tank of the transformer. However, the internal protection effect of the device is poor, and oil leakage easily occurs, thereby causing unnecessary safety hazards. In the related art, a three-layer sealing structure is designed to reduce the oil leakage phenomenon after the oil tank cover is installed. However, during the operation of the oil-immersed transformer, the pressure inside the oil tank changes due to the expansion and temperature change of the oil. However, the existing oil tank cover does not have a pressure relief structure, which poses a certain safety hazard and causes inconvenience in use. SUMMARY
[0004] (I) Technical problem solved
[0005] In view of the deficiencies of the prior art, the utility model provides an oil-immersed transformer oil tank cover, which has the advantages of being convenient for relieving the pressure inside the oil-immersed transformer, and solves the problem that the existing oil-immersed transformer oil tank cover does not have a pressure relief structure and poses a safety hazard.
[0006] (II) Technical scheme
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an oil-immersed transformer oil tank cover, comprising: a fixed cover, a sealing block is fixedly connected to the bottom of the fixed cover; a moving assembly is arranged in the fixed cover; the moving assembly comprises: a movable plate, which is slidably connected to the inside of the fixed cover; a limiting block, which is fixedly connected to one side of the movable plate; a first guide rod, which is fixedly connected to the inside of the fixed cover, and the first guide rod is slidably connected with the limiting block; an exhaust groove, which is arranged in the inside of the fixed cover, the exhaust groove penetrates the inside of the fixed cover, and a thread is arranged on the top of the exhaust groove; a pressure relief mechanism, which is installed on the top of the fixed cover.
[0008] In some embodiments, the pressure relief mechanism comprises: a fixed shell, which is threadedly connected to the top of the exhaust groove; a moving block, which is slidably connected to the inside of the fixed shell; a top cover, which is clamped to the top of the fixed shell; a pressure relief hole, which is arranged in the moving block and the side wall of the pressure relief hole.
[0009] In some embodiments, the bottom of the moving block is provided with a groove, and the pressure relief hole is arranged at the side of the groove inside the moving block.
[0010] In some embodiments, the two sides of the moving block are fixedly connected with limiting blocks, and the moving block is slidably connected with the inside of the fixed shell through the limiting blocks.
[0011] In some embodiments, one side of the fixed cover is provided with an alarm assembly; the alarm assembly comprises a sliding block slidably connected to the inside of the fixed cover, a second guide rod fixedly connected to the inside of the fixed cover, the second guide rod being slidably connected to the two sides of the sliding block, and a spring being arranged outside the second guide rod, an alarm bell fixedly connected to one side of the fixed cover, and a trigger button arranged on one side of the alarm bell.
[0012] In some embodiments, one end of the sliding block extends above the movable plate, and the part of the sliding block above the movable plate is provided with an inclined surface.
[0013] In some embodiments, one end of the sliding block extends above the movable plate, and the part of the sliding block above the movable plate is provided with an inclined surface.
[0014] In some embodiments, the exhaust groove and the pressure relief mechanism are a group, and four groups are arranged in the inside of the fixed cover and symmetrically.
[0015] (Three) beneficial effects
[0016] Compared with the prior art, the utility model provides an oil immersed transformer oil tank cover has the following beneficial effects:
[0017] The utility model discloses in using, when the inside pressure of oil immersed transformer is too big, will top movable plate upwards, thereby will movable plate remove to the top of exhaust groove, the pressure in the inside of transformer can be discharged to the inside of pressure relief mechanism through exhaust groove at this moment, and through the pressure relief hole in the discharge of high pressure gas of moving block and fixed shell outer wall, simultaneously, after the pressure balance, moving block will slide down to the inside of fixed shell under the action of gravity, thereby again block up exhaust groove top, prevent the sealing of transformer inside to be influenced. Accompanying drawing
[0018] Figure 1 It is the structural schematic diagram of the utility model;
[0019] Figure 2 It is the inside structure schematic diagram of the fixed cover of the utility model;
[0020] Figure 3 It is the structural schematic diagram of the exhaust groove of the utility model;
[0021] Figure 4 Figure 1 is a structural schematic diagram of the pressure relief mechanism of the utility model.
[0022] In the figure:
[0023] 11, fixed cover; 12, sealing block;
[0024] 2, moving assembly; 21, movable plate; 22, limiting block; 23, No. 1 guide rod; 24, exhaust groove; 25, pressure relief mechanism; 251, fixed shell; 252, moving block; 253, top cover; 254, pressure relief hole;
[0025] 3, alarm assembly; 31, sliding block; 32, No. 2 guide rod; 33, alarm bell; 34, trigger button. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0027] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.
[0028] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0029] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated or implying the number of technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope claimed in the present application.
[0030] In use, the operator places the gasket on the top of the transformer, and then installs the oil tank cover on the top of the transformer to seal the inside of the transformer.
[0031] In the related art, a three-layer sealing structure is designed to reduce the oil leakage phenomenon after the oil tank cover is installed, but during the operation of the oil-immersed transformer, the pressure inside the oil tank will change due to the expansion and temperature change of the oil. However, there is no pressure relief structure designed in the existing oil tank cover, which has certain safety hazards and causes inconvenience in use.
[0032] In order to solve the problems in the related art to some extent, the oil-immersed transformer oil tank cover provided by the embodiments of the present application is used. When the pressure inside the oil-immersed transformer is too large, the movable plate 21 will be pushed upwards, so as to move the movable plate 21 to the upper side of the exhaust groove 24. At this time, the pressure inside the transformer can be discharged to the inside of the pressure relief mechanism 25 through the exhaust groove 24, and the high-pressure gas can be discharged through the pressure relief hole 254 in the outer wall of the moving block 252 and the fixed shell 251. At the same time, after the air pressure is balanced, the moving block 252 will slide downward to the inside of the fixed shell 251 under the action of gravity, so as to block the top of the exhaust groove 24 again, preventing the sealing performance of the transformer from being affected.
[0033] The present application will be described below in conjunction with the drawings and specific embodiments:
[0034] In conjunction with Figures 1-4 , the embodiments of the present application provide an oil-immersed transformer oil tank cover, which comprises: a fixed cover 11, the bottom of which is fixedly connected with a sealing block 12; a moving assembly 2 is arranged in the inside of the fixed cover 11; the moving assembly 2 comprises: a movable plate 21, which is slidably connected to the inside of the fixed cover 11; a limiting block 22, which is fixedly connected to one side of the movable plate 21; a first guide rod 23, which is fixedly connected to the inside of the fixed cover 11, and the first guide rod 23 is slidably connected with the limiting block 22; an exhaust groove 24, which is arranged in the inside of the fixed cover 11, the exhaust groove 24 penetrates the inside of the fixed cover 11, and a thread is arranged at the top of the exhaust groove 24; a pressure relief mechanism 25, which is installed on the top of the fixed cover 11.
[0035] In use, the sealing block 12 is aligned with the top of the oil-immersed transformer and inserted downward, the joint is sealed by the sealing block 12, and then the fixing cover 11 is installed. When the internal pressure of the oil-immersed transformer is too high, the high-pressure gas pushes the movable plate 21 upward, thereby driving the movable plate 21 to move upward. When the movable plate 21 moves to the upper side of the exhaust groove 24, the pressure in the transformer can be discharged to the inside of the pressure relief mechanism 25 through the exhaust groove 24, and the high-pressure gas is discharged through the pressure relief hole 254 in the outer wall of the fixed shell 251 and the moving block 252. After the air pressure is balanced, the moving block 252 slides downward to the inside of the fixed shell 251 under the action of gravity, thereby blocking the top of the exhaust groove 24 again, preventing the sealing performance of the transformer from being affected, and the movable plate 21 is reset under the action of gravity and the spring outside the first guide rod 23, blocking the exhaust groove 24, thereby ensuring the sealing performance of the transformer.
[0036] In some embodiments, the pressure relief mechanism 25 includes a fixed shell 251 threadedly connected to the top of the exhaust groove 24, a moving block 252 slidingly connected to the inside of the fixed shell 251, a top cover 253 clamped to the top of the fixed shell 251, and a pressure relief hole 254 formed in the side wall of the moving block 252 and the pressure relief hole 254.
[0037] When high-pressure gas enters the inside of the fixed shell 251, because the top of the moving block 252 is a solid structure and the moving block 252 is slidingly connected to the inside of the fixed shell 251, the high-pressure gas wants to be discharged, which pushes the moving block 252 upward until the pressure relief hole 254 on the side of the moving block 252 reaches the pressure relief hole 254 of the fixed shell 251. The high-pressure gas is discharged from the inside of the fixed shell 251 through the pressure relief hole 254, thereby achieving pressure relief of the inside of the transformer.
[0038] In some embodiments, the bottom of the moving block 252 is recessed, and the pressure relief hole 254 is formed in the side of the recess in the inside of the moving block 252, which can achieve the lifting of the moving block 252 by high-pressure gas and the pressure relief through the pressure relief hole 254.
[0039] In some embodiments, the moving block 252 is slidingly connected to the inside of the fixed shell 251 through the limiting blocks fixedly connected to the two sides of the moving block 252, which ensures that the pressure relief hole 254 can be aligned with the pressure relief hole 254 in the outer wall of the fixed shell 251 after the moving block 252 slides upward.
[0040] In some embodiments, one side of the fixed cover 11 is provided with an alarm assembly 3; the alarm assembly 3 comprises: a sliding block 31 slidingly connected to the inside of the fixed cover 11; a second guide rod 32 fixedly connected to the inside of the fixed cover 11, the second guide rod 32 being slidingly connected to the two sides of the sliding block 31, and the outside of the second guide rod 32 being sleeved with a spring; an alarm bell 33 fixedly connected to one side of the fixed cover 11; and a trigger button 34 provided on one side of the alarm bell 33.
[0041] When the internal pressure of the transformer cannot be normally released, the internal pressure will continue to increase and try to push the movable plate 21 upward, when the movable plate 21 is pressed by the pressure exceeding the normal range, the movable plate 21 will move higher than usual, with the further upward movement of the movable plate 21, one side of the sliding block 31 will be pressed, thereby pushing the sliding block 31, driving the sliding block 31 to move towards the trigger button 34, compressing the spring outside the second guide rod 32, and then pressing the trigger button 34 to trigger the alarm bell 33 to alarm, when the internal pressure of the transformer returns to normal, the movable plate 21 resets downward, the sliding block 31 is no longer pressed, and is pushed back to the original position under the action of the spring outside the second guide rod 32, and the trigger button 34 is no longer pressed, thereby canceling the alarm, and facilitating the operator to determine the working condition of the transformer.
[0042] In some embodiments, one end of the sliding block 31 extends above the movable plate 21, and the part of the sliding block 31 above the movable plate 21 is provided with an inclined surface, so as to press the inclined surface on one side of the sliding block 31 when the movable plate 21 moves upward, thereby pushing the sliding block 31.
[0043] In some embodiments, the inside of the alarm bell 33 is provided with a battery to provide power for the alarm bell 33.
[0044] In some embodiments, the exhaust groove 24 and the pressure relief mechanism 25 are a group, and four groups are provided in the inside of the fixed cover 11, and are symmetrically arranged to enhance the pressure relief effect.
[0045] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification.
[0046] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of the technical solutions appears contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope required by the present application.
[0047] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. An oil-immersed transformer tank cover characterized by comprising: The utility model relates to a kind of exhaust valve for pressure relief device, including: Fixed cover (11), the bottom fixedly connected with sealing block (12);The inside of the fixed cover (11) is provided with moving assembly (2);The moving assembly (2) includes: Movable plate (21), slidingly connected in the inside of the fixed cover (11);Limiting block (22), fixedly connected to one side of the movable plate (21);No.
2. An oil-immersed transformer tank cover according to claim 1, characterized in that The inside of the fixed cover (11) is provided with exhaust groove (24), and the exhaust groove (24) penetrates the inside of the fixed cover (11), and the top of the exhaust groove (24) is provided with screw thread;Pressure relief mechanism (25) is installed on the top of the fixed cover (11). The pressure relief mechanism (25) includes:
3. An oil-immersed transformer tank cover according to claim 2, characterized in that: Fixed shell (251), screw thread is connected to the top of the exhaust groove (24);Moving block (252), slidingly connected in the inside of the fixed shell (251);Top cover (253), clamped to the top of the fixed shell (251);Pressure relief hole (254) is opened in the side wall of the moving block (252) and the pressure relief hole (254).
4. An oil-immersed transformer tank cover according to claim 2, characterized in that: The bottom of the moving block (252) is recessed, and the pressure relief hole (254) is opened in the side of the recessed groove in the moving block (252).
5. An oil-immersed transformer tank cover according to claim 1, characterized in that, The two sides of the moving block (252) are fixedly connected with limiting block, and the moving block (252) is slidingly connected with the inside of the fixed shell (251) by limiting block. The side of the fixed cover (11) is provided with alarm assembly (3);The alarm assembly (3) includes:
6. An oil-immersed transformer tank cover according to claim 5, characterized in that: Sliding block (31), slidingly connected in the inside of the fixed cover (11);No.
7. An oil-immersed transformer tank cover according to claim 5, characterized in that: The end of the sliding block (31) extends to the upper side of the movable plate (21), and the portion of the sliding block (31) located above the movable plate (21) is provided with inclined surface.
8. An oil-immersed transformer tank cover according to claim 1, characterized in that: The inside of the alarm bell (33) is provided with battery. The exhaust groove (24) and the pressure relief mechanism (25) are a group, and the inside of the fixed cover (11) is provided with four groups, and is symmetrically arranged.