Protective devices for transformer oil level gauges

Abstract

This application relates to the field of transformer technology and provides a protective device for a transformer oil level gauge. The device includes a protective cover mounting plate, an oil level gauge protective cover, and a transparent viewing window. The protective cover mounting plate is fixedly connected to the transformer oil level gauge via an oil level gauge mounting flange. The oil level gauge protective cover is fixedly connected to the protective cover mounting plate via a first fastener. The back of the oil level gauge protective cover is open, and the front has an opening larger than the oil level gauge reading window. The transparent viewing window covers the front opening of the oil level gauge protective cover, and the oil level gauge protective cover is fixedly connected to the transparent viewing window via a second fastener. This application uses the oil level gauge mounting flange to fix the mounting plate, and then uses the mounting plate to fix the protective cover, eliminating the need for welding fixing nuts. This facilitates installation and operation, effectively preventing corrosion of the oil level gauge by flying sand, stones, rain, snow, and frost. The front of the protective cover features a large, split transparent viewing window, facilitating observation and cleaning maintenance of the oil level gauge.

Description

Technical Field

[0001] This application belongs to the field of transformer technology, and in particular relates to a protective device for transformer oil level gauges. Background Technology

[0002] An oil conservator is a component in a transformer used for oil storage, replenishment, and protection. Connected to the transformer tank, it completely isolates the transformer oil from air and promptly compensates for pressure differences within the tank as the transformer temperature changes. Figure 1 As shown, the oil level in the transformer tank is indicated by an oil level gauge connected to the oil conservator. The oil level gauge not only displays the oil level but also triggers an alarm signal at the lowest or highest oil level and transmits it to the backend, enabling remote monitoring and protecting the safe operation of the transformer equipment. It is an essential and important component in the transformer.

[0003] Transformers mostly operate in complex outdoor environments. In particular, with the increasing number of new energy wind power and photovoltaic projects, many transformers even operate in harsh environments such as the Gobi Desert. The constant exposure to wind, sun, and flying sand and stones can easily cause aging and damage to transformers and oil level gauges. Furthermore, for transformers that are energized, if the oil level gauge junction box is exposed to rainwater, it can easily cause false alarms.

[0004] Currently, the main protection method is to install a protective cover on the oil level gauge. However, the cover itself is easily damaged by wind and rain, resulting in insufficient protection. Furthermore, dust easily accumulates on the surface of the cover when wet by rain, affecting the normal observation of the oil level gauge parameters. In addition, existing protective covers are usually directly fixed to the oil level gauge with bolts, requiring the welding of fixing nuts to the gauge, which is very inconvenient. Checking the oil level usually requires disassembling the entire protective cover, which is also inconvenient. Summary of the Invention

[0005] This application provides a protective device for transformer oil level gauges, which can solve the problems of insufficient protection, inconvenience in oil level gauge observation and disassembly / removal.

[0006] Based on this, the present invention adopts the following technical solution: This application provides a protective device for a transformer oil level gauge, including a protective cover mounting plate, an oil level gauge protective cover, and a transparent viewing window; The protective cover mounting plate is fixedly connected to the transformer oil level gauge via the oil level gauge mounting flange; wherein, the oil level gauge mounting flange is used to fix the transformer oil level gauge to the transformer oil conservator. The oil level gauge protective cover is fixedly connected to the protective cover mounting plate by the first fastener, and the transformer oil level gauge is sleeved inside the oil level gauge protective cover; The back of the oil level gauge protective cover is an open surface, and the back of the oil level gauge protective cover is in contact with the transformer oil tank. The front of the oil level gauge protective cover has an opening, and the size of the front opening of the oil level gauge protective cover is larger than the oil level gauge reading window. The transparent window covers the front opening of the oil level gauge protective cover, and the oil level gauge protective cover is fixedly connected to the transparent window by a second fastener.

[0007] In one embodiment, the protective cover mounting plate includes an integrally formed vertical plate and a horizontal plate; The vertical plate is provided with a first mounting hole that matches the oil level gauge fastener; wherein, the oil level gauge fastener is used to fix the transformer oil level gauge to the oil level gauge mounting flange. The protective cover mounting plate is connected to the oil level gauge mounting flange via the oil level gauge fasteners and screws. The horizontal plate is provided with a second mounting hole that matches the first fastener, and the top surface of the oil level gauge protective cover is provided with a third mounting hole that corresponds to the second mounting hole; The second mounting hole and the third mounting hole cooperate with the first fastener.

[0008] In one embodiment, The edge of the visible transparent window is provided with a fourth mounting hole that matches the second fastener, and the edge of the front opening of the oil level gauge protective cover is provided with a fifth mounting hole that corresponds to the fourth mounting hole. The fourth mounting hole and the fifth mounting hole cooperate with the second fastener.

[0009] In one embodiment, a sealing element is also provided at the connection between the transparent window and the oil level gauge cover.

[0010] In one embodiment, the protective device for the transformer oil level gauge further includes an arc-shaped guide plate; The arc-shaped guide plate is disposed above the oil level gauge protective cover, and the arc-shaped guide plate is provided with a sixth mounting hole that matches the first fastener; The arc-shaped guide plate is connected to the oil level gauge protective cover via the first fastener.

[0011] In one embodiment, the first fastener includes a bolt, a nut, a flat washer, and a spring washer; And / or, the second fastener includes a bolt, nut, flat washer, and spring washer.

[0012] In one embodiment, the bolt, nut, flat washer, and spring washer in the first fastener are of size M8; And / or, the bolts, nuts, flat washers, and spring washers in the second fastener are of size M6.

[0013] In one embodiment, the seal is made of EPDM rubber.

[0014] In one embodiment, the protective cover mounting plate, the oil level gauge protective cover, the first fastener, and the second fastener are all made of stainless steel; And / or, the visible transparent window is made of tempered glass.

[0015] In one embodiment, the bottom surface of the oil level gauge protective cover is provided with an outlet hole for the secondary wires of the oil level gauge to pass through.

[0016] The beneficial effects of this utility model are: The mounting plate is fixedly connected by the mounting flange used to install the oil level gauge, and then the protective cover is fixedly connected by the mounting plate. There is no need to weld the fixing nuts, making the installation and operation convenient. The protective device can also be directly installed on the transformer that is already in operation. The oil level gauge is encased in a protective cover, which effectively prevents the oil level gauge from being corroded by flying sand, stones, rain, snow, and frost, thus improving the safety performance and service life of the oil level gauge. The protective cover has a large visible transparent area on the front, which makes it easier to observe the oil level gauge. At the same time, the visible transparent window and the protective cover are separate structures, and the visible transparent window can be removed separately, which not only makes it easier to clean, but also makes it easier to maintain and inspect the oil level gauge. An arc-shaped deflector is added to the top of the protective cover to protect it from rain and dust. This reduces the problem of water seepage caused by rain, snow, wind, and frost, as well as the problem of dust adhesion caused by flying sand and stones, further improving the protective reliability of the cover. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a transformer without protective devices in the existing technology; Figure 2 This is a schematic front view of the protective device provided in one embodiment of this application; Figure 3This is a rear view structural schematic diagram of a protective device provided in an embodiment of this application; Figure 4 This is an assembly diagram of the mounting plate of the protective cover provided in one embodiment of this application; Figure 5 This is a front view structural schematic diagram of an embodiment of the oil level gauge protective cover provided in this application; Figure 6 This is a rear view structural schematic diagram of an embodiment of the oil level gauge protective cover provided in this application; Figure 7 This is a schematic diagram of the structure of a protective cover mounting plate provided in one embodiment of this application; Figure 8 This is a schematic diagram of the structure of a visible transparent window provided in an embodiment of this application; Figure 9 This is a schematic diagram of a transformer equipped with a protective device according to an embodiment of this application; Figure 10 This is a schematic diagram of the structure of another protective device provided in one embodiment of this application; Figure 11 This is a schematic diagram of a transformer equipped with another protective device according to an embodiment of this application; Legend: 1-Transformer oil level gauge; 2-Transformer oil conservator; 3-Protective cover mounting plate; 4-Oil level gauge protective cover; 5-Visible transparent window; 6-First fastener; 7-Second fastener; 8-Arc-shaped guide plate; 11-Oil level gauge mounting flange; 12-Oil level gauge fastener; 13-Oil level gauge reading window; 31-First mounting hole; 31-Second mounting hole; 41-Third mounting hole; 42-Fifth mounting hole; 43-Outlet hole; 51-Fourth mounting hole. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0023] This application provides a protective device for a transformer oil level gauge. See [link / reference] Figure 2 and Figure 3 The protective device includes a protective cover mounting plate 3, an oil level gauge protective cover 4, and a transparent viewing window 5. The protective cover mounting plate 5 is fixedly connected to the transformer oil level gauge 1 via an oil level gauge mounting flange 11. The oil level gauge mounting flange 11 is used to fix the transformer oil level gauge 1 to the transformer oil conservator 2.

[0024] In this embodiment, the oil level gauge protective cover 4 is fixedly connected to the protective cover mounting plate 3 by the first fastener 6, and the transformer oil level gauge 1 is sleeved inside the oil level gauge protective cover 4; the back of the oil level gauge protective cover 4 is an open surface, see [reference]. Figure 9 and Figure 11 The back of the oil level gauge protective cover 4 is in contact with the transformer oil tank 2.

[0025] In this embodiment, the front of the oil level gauge protective cover 4 is provided with an opening, and the size of the front opening of the oil level gauge protective cover 4 is larger than the oil level gauge reading window 13; the visible transparent window 5 covers the front opening of the oil level gauge protective cover 4, and the oil level gauge protective cover 4 is fixedly connected to the visible transparent window 5 by the second fastener 7.

[0026] During installation, first install the protective cover mounting plate 3 onto the oil level gauge mounting flange 11, and at the same time connect the oil level gauge protective cover 4 and the visible transparent window 5 to form a protective body through the second fastener 7. After the above two parts are installed, the protective body can be inserted into the matching position of the first fastener 6 from the top or front of the protective cover mounting plate 3 and then connected through the first fastener 6.

[0027] Further, see Figure 4 and Figure 5The protective cover mounting plate 3 includes an integrally formed vertical plate and a horizontal plate. The vertical plate of the protective cover mounting plate 3 has a first mounting hole 31 that matches the oil level gauge fastener 12, and the horizontal plate of the protective cover mounting plate 3 has a second mounting hole 32 that matches the first fastener 6. The oil level gauge fastener 12 is used to fix the transformer oil level gauge 1 to the oil level gauge mounting flange 11. The protective cover mounting plate 3 is connected to the oil level gauge mounting flange 11 via the oil level gauge fastener 12 using a thread.

[0028] Furthermore, such as Figure 6 and Figure 7 As shown, the top surface of the oil level gauge protective cover 4 is provided with a third mounting hole 41 corresponding to the second mounting hole 32, and the front opening edge of the oil level gauge protective cover 4 is provided with a fifth mounting hole 42 corresponding to the fourth mounting hole 51. The bottom surface of the oil level gauge protective cover 4 is provided with an outlet hole 43 for the secondary wire of the oil level gauge to pass through. In this embodiment, the second mounting hole 32 and the third mounting hole 41 cooperate with the first fastener 6.

[0029] In one feasible solution, to increase installation margin and facilitate installation, the third mounting hole 41 can be a slit-like structure. Of course, to prevent water ingress, the third mounting hole 41 can also be a hole-like structure.

[0030] Further, see Figure 8 The edge of the transparent window 5 is provided with a fourth mounting hole 51 that matches the second fastener 7. In this embodiment, the fourth mounting hole 51 and the fifth mounting hole 42 cooperate with the second fastener 7.

[0031] Furthermore, a sealing element is provided at the connection between the visible transparent window 5 and the oil level gauge protective cover 4.

[0032] Furthermore, the first fastener 6 includes a bolt, a nut, a flat washer, and a spring washer; the second fastener 7 includes a bolt, a nut, a flat washer, and a spring washer.

[0033] Furthermore, the bolts, nuts, flat washers, and spring washers in the first fastener 6 are of M8 specification; the bolts, nuts, flat washers, and spring washers in the second fastener 7 are of M6 specification.

[0034] Specifically, the standards for the first fastener 6 and the second fastener 7 are: bolt GB5783-2000, nut GB / T6170, flat washer GB / T97.1, and spring washer GB / T93.

[0035] The specifications of the first fastener 6 include: M8×20 bolt (304 stainless steel or 316 stainless steel), M8 nut (hot-dip galvanized), M8 flat washer (304 stainless steel or 316 stainless steel), and M8 spring washer (304 stainless steel or 316 stainless steel).

[0036] The specifications of the second fastener 7 include: M6×20 bolt (304 stainless steel or 316 stainless steel), M6 nut (hot-dip galvanized), M6 flat washer (304 stainless steel or 316 stainless steel), and M6 spring washer (304 stainless steel or 316 stainless steel).

[0037] Furthermore, the sealing material is EPDM rubber, the protective cover mounting plate 3 and the oil level gauge protective cover 4 are made of stainless steel, and the transparent window 5 is made of tempered glass.

[0038] Further, see Figure 10 and Figure 11 Another protective device also includes an arc-shaped guide plate 8, which is disposed above the oil level gauge protective cover 4. Although not shown in the figure, the arc-shaped guide plate 8 is provided with a sixth mounting hole that matches the first fastener 6. The arc-shaped guide plate 8 is connected to the oil level gauge protective cover 4 by means of the first fastener 6.

[0039] In this embodiment, the width of both ends of the arc-shaped guide plate 8 is greater than the width of the top surface of the oil level gauge protective cover 4, so as to guide rainwater to the outside of the oil level gauge protective cover 4.

[0040] Based on the above embodiments, the beneficial effects of this utility model can be obtained as follows: 1. The mounting plate is fixedly connected by the mounting flange used to install the oil level gauge, and then the protective cover is fixedly connected by the mounting plate. There is no need to weld the fixing nuts, which makes the installation and operation convenient. The protective device can also be directly installed on the transformer that is already in operation. 2. The oil level gauge is encased in a protective cover, which effectively prevents the oil level gauge from being corroded by flying sand, stones, rain, snow, and frost, thus improving the safety performance and service life of the oil level gauge. 3. The front of the protective cover has a large visible transparent area, which makes it easier to observe the oil level gauge. At the same time, the visible transparent window and the protective cover are separate structures, and the visible transparent window can be removed separately, which is not only easy to clean, but also easy to maintain and inspect the oil level gauge. 4. An arc-shaped deflector is added to the top of the protective cover to protect it from rain and dust. This reduces the problem of water seepage caused by rain, snow, wind, and frost, as well as the problem of dust adhesion caused by flying sand and stones, further improving the protective reliability of the cover.

[0041] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A protective device for a transformer oil level gauge, characterized in that, This includes a protective cover mounting plate, an oil level gauge protective cover, and a transparent viewing window; The protective cover mounting plate is fixedly connected to the transformer oil level gauge via the oil level gauge mounting flange; wherein, the oil level gauge mounting flange is used to fix the transformer oil level gauge to the transformer oil conservator. The oil level gauge protective cover is fixedly connected to the protective cover mounting plate by the first fastener, and the transformer oil level gauge is sleeved inside the oil level gauge protective cover; The back of the oil level gauge protective cover is an open surface, and the back of the oil level gauge protective cover is in contact with the transformer oil tank. The front of the oil level gauge protective cover has an opening, and the size of the front opening of the oil level gauge protective cover is larger than the oil level gauge reading window. The transparent window covers the front opening of the oil level gauge protective cover, and the oil level gauge protective cover is fixedly connected to the transparent window by a second fastener.

2. The protective device for transformer oil level gauges as described in claim 1, characterized in that, The protective cover mounting plate includes an integrally formed vertical plate and a horizontal plate; The vertical plate is provided with a first mounting hole that matches the oil level gauge fastener; wherein, the oil level gauge fastener is used to fix the transformer oil level gauge to the oil level gauge mounting flange. The protective cover mounting plate is connected to the oil level gauge mounting flange by means of the oil level gauge fasteners; The horizontal plate is provided with a second mounting hole that matches the first fastener, and the top surface of the oil level gauge protective cover is provided with a third mounting hole that corresponds to the second mounting hole; The second mounting hole and the third mounting hole cooperate with the first fastener.

3. The protective device for transformer oil level gauges as described in claim 1, characterized in that, The edge of the visible transparent window is provided with a fourth mounting hole that matches the second fastener, and the edge of the front opening of the oil level gauge protective cover is provided with a fifth mounting hole that corresponds to the fourth mounting hole. The fourth mounting hole and the fifth mounting hole cooperate with the second fastener.

4. The protective device for transformer oil level gauges as described in claim 3, characterized in that, A sealing element is also provided at the connection between the transparent window and the oil level gauge protective cover.

5. The protective device for transformer oil level gauges as described in claim 1, characterized in that, The protective device for the transformer oil level gauge also includes an arc-shaped flow guide plate; The arc-shaped guide plate is disposed above the oil level gauge protective cover, and the arc-shaped guide plate is provided with a sixth mounting hole that matches the first fastener; The arc-shaped guide plate is connected to the oil level gauge protective cover via the first fastener.

6. The protective device for transformer oil level gauges as described in claim 1, characterized in that, The first fastener includes a bolt, a nut, a flat washer, and a spring washer; And / or, the second fastener includes a bolt, nut, flat washer, and spring washer.

7. The protective device for transformer oil level gauges as described in claim 6, characterized in that, The bolts, nuts, flat washers, and spring washers in the first fastener are all of size M8. And / or, the bolts, nuts, flat washers, and spring washers in the second fastener are of size M6.

8. The protective device for transformer oil level gauges as described in claim 4, characterized in that, The sealing element is made of EPDM rubber.

9. The protective device for transformer oil level gauges as described in claim 1, characterized in that, The protective cover mounting plate, the oil level gauge protective cover, the first fastener and the second fastener are all made of stainless steel. And / or, the visible transparent window is made of tempered glass.

10. The protective device for transformer oil level gauges as described in claim 1, characterized in that, The bottom surface of the oil level gauge protective cover is provided with an outlet hole for the secondary wires of the oil level gauge to pass through.

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