Waterproof and sand-proof expander outer cover

Abstract

The utility model relates to a waterproof and sand-proof expander outer cover, which belongs to the technical field of mutual inductors and is mounted on an oil conservator, a top hole is arranged at the top end of the oil conservator, the expander outer cover is mounted on the top hole and comprises a shell, a circle of flanging is arranged at the lower end of the shell, a concave edge is arranged at the edge of the top hole, and the flanging at the lower end of the shell is mounted in the concave edge. The flange is connected with the top end of the oil conservator through a screw, a round groove is formed in the concave edge, a lower sealing ring is arranged in the round groove, a round groove is formed in the outer circumferential face of the concave edge, and a side sealing ring is arranged in the round groove. The sealing rings are arranged on the bottom face and the side faces of the expander outer cover, the sealing effect is good, and the inside of the mutual inductor can be prevented from being polluted by external sand storm and dust.

Description

Technical Field

[0001] The utility model relates to a waterproof and sandproof expander cover, belonging to the technical field of mutual inductors. Background Art

[0002] The expander is one of the key components of the oil-immersed current transformer. Its main function is to adjust the internal pressure of the transformer, protect the insulation system, and monitor the temperature change of the transformer. Its advantage is that it can ensure that the current transformer remains stable when the temperature changes, and at the same time use a closed compensation device to compensate for the internal oil level.

[0003] Since most current transformer products operate outdoors, exposed to the sun, rain, wind and sand for many years, the connection between the expander cover and the oil storage cabinet is prone to leaking sand and dust due to poor sealing, which will pollute the inside of the transformer.

[0004] This utility model patent with application number CN202122582307.5 discloses a transparent expander cover, including: a bottom plate, a metal bellows is installed on the top of the bottom plate, a top plate is installed on the top of the metal bellows, an oil inlet is installed on the outer wall of the top plate, a scale line is also installed on the outer wall of the top plate, a limiting mechanism is also installed on the top of the bottom plate, and a closing mechanism is installed on the top of the limiting mechanism; the limiting mechanism includes: four fixed blocks, the inner cavity of the fixed block is slidably installed with a plug rod, and one end of the plug rod extends out of the outer wall of the fixed block. In actual use, the transparent cover can be quickly and conveniently installed stably without tightening several bolts, saving time and effort. However, the sealing condition of the bottom of the expander cover is not good, which is easy to contaminate the inside of the transformer.

[0005] The oil level indicator on the expander housing may fade or even peel off, which may prevent the product from accurately performing its intended function. At the same time, in strong wind conditions, the housing may vibrate for a long time, causing damage. Utility Model Content

[0006] The utility model aims to solve the technical problem of poor sealing effect in the prior art and provide a waterproof and sandproof expander cover.

[0007] The utility model is realized by the following technical solutions:

[0008] That is, a waterproof and wind-proof expander cover, which is installed on an oil storage cabinet. A top hole is opened at the top of the oil storage cabinet, and the expander cover is installed on the top hole. It includes a shell, a circle of flange is provided at the lower end of the shell, a concave edge is provided at the edge of the top hole, the flange at the lower end of the shell is installed in the concave edge, the flange and the top of the oil storage cabinet are connected by screws, a circular groove is provided on the concave edge, a lower sealing ring is provided in the circular groove, a circular groove is provided on the outer circumferential surface of the concave edge, and a side sealing ring is provided in the circular groove.

[0009] The bottom and side surfaces of the expander outer cover of the utility model are both provided with sealing rings, which have good sealing effect and can prevent external sand and dust from polluting the inside of the mutual inductor.

[0010] Further preferably, the upper end surface of the concave edge is flush with the upper end surface of the oil storage cabinet.

[0011] Preferably, a transparent window is provided on the housing to facilitate observation of the oil inside the expander.

[0012] Further preferably, the side of the transparent window is connected to the shell by a hinge, the structure is simple, and the transparent window switch is easy to operate.

[0013] Further preferably, an oil level identification plate is provided on the inner side of the transparent window. The oil level identification plate is arranged on the inner side, is not easily polluted or damaged, and can display the oil level in real time.

[0014] Further preferably, a handle is installed on the outer side of the transparent window.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The bottom and side surfaces of the expander outer cover of the utility model are both provided with sealing rings, which have good sealing effect and can prevent external sand and dust from polluting the inside of the mutual inductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0019] Figure 2 It is a schematic diagram of the top structure of the oil storage cabinet in a specific implementation manner of the utility model.

[0020] Figure 3 for Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0021] In the figure: 1. Oil storage cabinet; 2. Top hole; 3. Concave edge; 4. Lower sealing ring; 5. Shell; 6. Transparent window; 7. Handle; 8. Oil level identification plate; 9. Flanged edge; 10. Screw; 11. Side sealing ring; 12. Hinge. DETAILED DESCRIPTION

[0022] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 A waterproof and wind-proof expander cover is shown, the expander cover is installed on an oil storage tank 1, a top hole 2 is opened at the top of the oil storage tank 1, the expander cover is installed on the top hole 2, and includes a shell 5, a flange 9 is provided at the lower end of the shell 5, a concave edge 3 is provided at the edge of the top hole 2, the flange 9 at the lower end of the shell 5 is installed in the concave edge 3, the flange 9 is connected to the top of the oil storage tank 1 by screws 10, the upper end surface of the concave edge 3 is flush with the upper end surface of the oil storage tank 1, a circular groove is provided on the concave edge 3, a lower sealing ring 4 is provided in the circular groove, and a circular groove is provided on the outer circumferential surface of the concave edge 3, and a side sealing ring 11 is provided in the circular groove.

[0024] The bottom and side surfaces of the expander outer cover of the utility model are both provided with sealing rings, which have good sealing effect and can prevent external sand and dust from polluting the inside of the mutual inductor.

[0025] Among them, a transparent window 6 that can be opened and closed is provided on the shell 5, and a handle 7 is installed on the outer surface of the transparent window 6 to facilitate observation of the oil condition inside the expander. The side of the transparent window 6 is connected to the shell 5 through a hinge 12. The structure is simple and the transparent window 6 is easy to open and close.

[0026] An oil level identification plate 8 is provided on the inner side of the transparent window 6. The oil level identification plate 8 is arranged on the inner side, is not easily polluted or damaged, and can display the oil level in real time.

[0027] Working principle:

[0028] The bottom and side of the expander cover of the utility model are both provided with sealing rings, which have good sealing effect and can prevent external sand and dust from polluting the inside of the mutual inductor. The housing 5 is connected to the oil storage cabinet 1 by screws 10, which is very convenient for disassembly and assembly, and the transparent window 6 is convenient for observing the situation of the expander.

[0029] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0030] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A waterproof and sandproof expander cover, the expander cover is installed on an oil storage tank (1), a top hole (2) is opened at the top of the oil storage tank (1), and the expander cover is installed on the top hole (2), characterized in that: The utility model comprises a shell (5), wherein a flange (9) is provided at the lower end of the shell (5), a concave edge (3) is provided at the edge of the top hole (2), the flange (9) at the lower end of the shell (5) is installed in the concave edge (3), the flange (9) and the top end of the oil storage cabinet (1) are connected by screws (10), a circular groove is provided on the concave edge (3), a lower sealing ring (4) is provided in the circular groove, and a circular groove is provided on the outer circumferential surface of the concave edge (3), a side sealing ring (11) is provided in the circular groove.

2. The waterproof and sandproof expander cover according to claim 1, characterized in that: The upper end surface of the concave edge (3) is flush with the upper end surface of the oil storage cabinet (1).

3. The waterproof and sandproof expander cover according to claim 1, characterized in that: The housing (5) is provided with a transparent window (6) that can be opened and closed.

4. The waterproof and sandproof expander cover according to claim 3, characterized in that: The side edge of the transparent window (6) is connected to the housing (5) via a hinge (12).

5. The waterproof and sandproof expander cover according to claim 3, characterized in that: An oil level identification plate (8) is provided on the inner side of the transparent viewing window (6).

6. The waterproof and sandproof expander cover according to claim 1, characterized in that: A handle (7) is mounted on the outer side of the transparent window (6).

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