Oil conservator for on-load switch of transformer
By setting a sealing cover at the top of the outlet pipe of the oil pillow and defining the position of the sealing cover using the clamp and spring mechanism, the problem of air leakage in the oil pillow exhaust hole sealing plug is solved, and the balance of the internal pressure of the oil pillow and the precise control of oil storage and oil output is achieved.
Patent Information
- Application Number
- CN202421548121.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The sealing plug at the exhaust hole of the existing oil pillow is prone to air leakage, resulting in a drop in the pressure inside the oil pillow and loss of control of oil storage and oil level adjustment.
An oil pillow for a transformer on-load switch is designed. By providing a sealing cover at the top of the air outlet pipe and a slit on the outer surface of the sealing cover, the position of the sealing cover is defined by a clamp and a spring mechanism to avoid air leakage.
It effectively avoids air leakage in the exhaust hole, maintains the pressure balance inside the oil pillow, and ensures accurate control of oil storage and oil output.
Smart Images
Figure CN222838658U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil pillow manufacturing devices, in particular to an oil pillow for a transformer on-load switch. Background Art
[0002] The oil pillow is usually used in a set with the transformer. It is mainly used for oil storage and oil discharge, so that the transformer can always maintain lubrication and effectively extend the service life of the transformer.
[0003] At present, the commonly used capsule oil pillow is mainly a capsule placed inside the oil pillow, which adjusts the pressure inside the oil pillow through the capsule to achieve the purpose of adjusting the oil level and oil storage. In actual use, an exhaust hole is set on the top of the oil pillow, and the exhaust hole can adjust the pressure inside the oil pillow, but the sealing plug at the exhaust hole is prone to leakage, and the pressure inside the oil pillow drops, resulting in the loss of control of the oil storage and oil level adjustment inside the oil pillow. In view of the above situation, it is necessary to study a new structure of the transformer on-load switch oil pillow to reduce or avoid leakage of the exhaust hole. Summary of the invention
[0004] The utility model aims to overcome the deficiencies of the above-mentioned prior art and provide an oil pillow for a transformer on-load switch, which can limit the sealing plug in the exhaust hole at the top of the oil pillow, thereby avoiding air leakage in the exhaust hole.
[0005] The technical solution adopted to achieve the purpose of the utility model is an oil pillow for a transformer on-load switch, comprising a breather, an oil pillow main body and a groove-shaped capsule arranged in the oil pillow main body, the breather is connected to the groove-shaped capsule through an inlet at the top of the oil pillow main body, and an exhaust hole is arranged on the top of the oil pillow; it is characterized in that: it also includes an air outlet pipe, the top of the air outlet pipe extends out from the exhaust pipe, the top of the air outlet pipe is provided with a sealing cover, the outer surface of the sealing cover is provided with a slot, the outer wall of the air outlet pipe is provided with a hollow fixing rod, the hollow interior of the fixing rod is connected with a block through a spring, the top of the block is provided with an extension portion facing the outer surface of the sealing cover, the bottom surface of the extension portion is provided with a downward limit block, and the limit block is inserted into the slot.
[0006] In the above technical solution, the fixing rod is connected to the outer wall of the air outlet pipe via a torsion spring.
[0007] In the above technical solution, a fixed frame is connected below the oil pillow body, an elliptical capsule is arranged inside the fixed frame, a connecting tube is connected to the bottom of the elliptical capsule, the other end of the connecting tube is connected to the oil pillow body, and a float is arranged inside the connecting tube.
[0008] In the above technical solution, the sealing cover includes a cover surface and a sealing plug, the sealing plug is fixedly connected to the cover surface or is an integrated structure, and the cross-sectional area of the cover surface is larger than the cross-sectional area of the sealing plug, and the sealing plug is arranged in the air outlet pipe; the card slot is arranged on the outer surface of the cover surface.
[0009] The utility model pulls the clamping block to clamp the clamping block in the clamping groove, so that the clamping block can limit the position of the sealing cover, and at the same time limits the position of the fixing rod through the torsion spring, so that the connection between the air outlet pipe and the sealing cover is tighter, and the sealing cover is not prone to air leakage, thereby making the pressure inside the oil pillow body more balanced, thereby making the oil storage and oil discharge of the oil pillow body more accurate.
[0010] The utility model has the following beneficial effects for the oil pillow of the transformer on-load switch: it solves the technical problem that the position of the sealing plug cannot be limited at the exhaust hole of the existing oil pillow body, causing the sealing plug to leak, thereby causing the pressure inside the oil pillow to be insufficient, and thus making it difficult to control the oil storage and oil output inside the oil pillow. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The diagram is a front view of an oil conservator for a transformer on-load switch according to an embodiment.
[0012] Figure 2 The figure is a rear view schematic diagram of an oil conservator for a transformer on-load switch according to an embodiment.
[0013] Figure 3 The figure is a three-dimensional schematic diagram of an oil conservator for a transformer on-load switch according to an embodiment.
[0014] Figure 4 The figure is a schematic diagram of the structure of a fixing component in an oil pillow of an on-load switch for a transformer according to an embodiment.
[0015] In the figure, 1-oil pillow body; 2-fixing frame; 201-elliptical capsule; 202-connecting pipe; 203-float; 3-oil outlet; 4-respirator; 401-connecting pipe; 402-inlet; 403-groove capsule; 5-deflation mechanism; 501-air outlet pipe; 502-sealing cover; 503-fixing rod; 504-torsion spring; 505-spring; 506-block; 507-slot. DETAILED DESCRIPTION
[0016] The technical solution of the utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0017] As attached Figure 1-4As shown, the utility model of the oil pillow for the transformer on-load switch comprises an oil pillow body 1, a grooved capsule 403 and a respirator 4 arranged in the oil pillow body 1, the top of the oil pillow body 1 is fixedly connected with an inlet 402, the bottom of the inlet 402 is connected to the grooved capsule 403, the top of the inlet 402 is fixedly connected to one end of the connecting pipe 401, and the other end of the connecting pipe 401 is fixedly connected to the top of the respirator 4, and the respirator 4 can control the pressure of the grooved capsule 403. After the pressure of the grooved capsule 403 is controlled, the pressure inside the oil pillow body 1 will change.
[0018] A deflation mechanism 5 is provided at the top of the oil pillow body 1, and an oil outlet 3 is provided at the bottom of the oil pillow body 1. The deflation mechanism 5 includes an outlet pipe 501 and a fixing component. The top of the outlet pipe 501 extends out of the exhaust pipe. A sealing cover 502 is provided at the top of the outlet pipe 501. The outlet pipe 501 is used to deflate and balance the pressure.
[0019] The fixed components include:
[0020] The fixing rod 503 is a hollow structure, and a spring 505 is connected to the hollow interior of the fixing rod; the fixing rod 503 is rotatably connected to the outer wall of the air outlet pipe 501 through a torsion spring 504; the torsion spring 504 is used to limit the position of the fixing rod 503;
[0021] The sealing cover 502 includes a cover surface and a sealing plug. The sealing plug is fixedly connected to the cover surface or is an integrated structure. The cross-sectional area of the cover surface is larger than the cross-sectional area of the sealing plug. The sealing plug is arranged in the air outlet pipe. The outer surface of the cover surface is provided with a card slot 507.
[0022] The clamping block 506 is connected to the spring 505 arranged inside the fixing rod 503, and the spring 505 is used to control the range of movement of the clamping block 506; the top of the clamping block 506 is provided with an extension portion facing the top surface of the sealing cover 502, and the bottom surface of the extension portion is provided with a downward limit block, which is inserted into the clamping groove 507, so as to realize the position of the sealing cover 502 being limited by the clamping block 506.
[0023] A fixing frame 2 is provided below the oil pillow body 1, an elliptical capsule 201 is provided inside the fixing frame 2, a connecting pipe 202 is fixedly connected to the bottom of the elliptical capsule 201, one end of the connecting pipe 202 is connected to the fixing frame 2, and the other end of the connecting pipe 202 is connected to the oil pillow body 1, and a floating ball 203 is provided inside the connecting pipe 202. The oil inside the oil pillow body 1 gives a certain pressure to the elliptical capsule 201, so that the elliptical capsule 201 is squeezed, so that the liquid level inside the connecting pipe 202 changes with the oil level inside the oil pillow body 1, and the rise and fall of the oil level drives the rise and fall of the floating ball 203, so that it is convenient to check the oil level according to the floating ball 203.
[0024] The working process of the oil conservator of the utility model used for transformer on-load switch is as follows:
[0025] When it is necessary to deflate, the block 506 is removed and the sealing cover 502 is taken out from the air outlet pipe 501. When it is not necessary to deflate (keep the seal), the block 506 is pulled and the block 506 is engaged in the card slot 507, so that the block 506 can limit the position of the sealing cover 502. In addition, the position of the fixing rod 503 is limited by the rotation of the torsion spring 504, so that the connection between the air outlet pipe 501 and the sealing cover 502 is tighter, so that it is not easy to leak at the sealing cover 502, and then the pressure inside the oil pillow body 1 is more balanced, so that the oil storage and oil output of the oil pillow body 1 are more accurate.
Claims
1. An oil conservator for a transformer on-load switch, comprising a respirator, an oil conservator body and a groove-shaped capsule arranged in the oil conservator body, wherein the respirator is connected to the groove-shaped capsule through an inlet at the top of the oil conservator body, and an exhaust hole is arranged at the top of the oil conservator; characterized in that: It also includes an air outlet pipe, the top of the air outlet pipe extends out from the exhaust hole, a sealing cover is provided at the top of the air outlet pipe, a card slot is provided on the outer surface of the sealing cover, a hollow fixing rod is provided on the outer wall of the air outlet pipe, a card block is connected to the hollow interior of the fixing rod through a spring, an extension portion toward the outer surface of the sealing cover is provided at the top of the card block, a downward limiting block is provided on the bottom surface of the extending portion, and the limiting block is inserted into the card slot.
2. The oil conservator for transformer on-load switch according to claim 1, characterized in that: The fixing rod is connected to the outer wall of the air outlet pipe through a torsion spring.
3. The oil conservator for transformer on-load switch according to claim 2, characterized in that: A fixing frame is connected below the oil pillow body, an elliptical capsule is arranged inside the fixing frame, a connecting pipe is connected to the bottom of the elliptical capsule, the other end of the connecting pipe is connected to the oil pillow body, and a float is arranged inside the connecting pipe.
4. The oil conservator for transformer on-load switch according to any one of claims 1 to 3, characterized in that: The sealing cover comprises a cover surface and a sealing plug, the sealing plug is fixedly connected to the cover surface or is an integrated structure, and the cross-sectional area of the cover surface is larger than the cross-sectional area of the sealing plug, and the sealing plug is arranged in the air outlet pipe; the card slot is arranged on the outer surface of the cover surface.