Bent neck type magnetically coupled oil temperature gauge case

Abstract

The utility model provides a kind of bent neck formula magnetic coupling oil temperature table shell, belong to transformer oil table accessory technical field, including table shell, the inner wall top of table shell is provided with the sealing element that is butt-jointed with shell cover, the lateral wall of table shell is fixedly connected with the wiring port integrally formed with it, and the inner wall of wiring port is provided with limit boss, limit boss is located the innermost side of wiring port, and oil gauge wiring is led out to the outside connection of table shell, two limit bosses are used to limit the oil gauge wiring, the bottom of table shell is provided with touch oil interface, and touch oil interface is connected with table shell between by bent neck connecting portion intercommunication, and the inner wall of bent neck connecting portion and table shell interface place is embedded and is provided with temperature measuring magnetic force disc for blocking oil flow circulation.Touch oil interface is used to butt-joint with transformer oil pillow, transformer oil is heated after touch oil side, temperature change will be transferred to temperature measuring element such as temperature bag, thermosensitive component etc., is placed in touch oil side.

Description

Technical Field

[0001] This utility model relates to the technical field of transformer oil gauge accessories, specifically a bent-neck magnetic coupling oil temperature gauge housing. Background Technology

[0002] Transformer oil has a much higher insulation strength than air, effectively isolating live components such as windings and cores to prevent short circuits and electrical breakdowns. It transfers heat to the radiator through convection circulation. Its high specific heat capacity and good thermal conductivity prevent local overheating of the equipment. During operation, heated oil rises and sinks after cooling, forming a circulation for continuous heat dissipation. When switching oil circuit breakers or tap changers, the oil decomposes under heat to generate high-pressure gas, which can quickly extinguish the arc and suppress corona discharge.

[0003] The volume of transformer insulating oil expands and contracts with temperature changes. This is the core principle by which oil gauges can indirectly reflect oil temperature. When the insulating oil is heated, it expands and its volume increases, causing the oil level in the tank to rise and the oil gauge pointer or oil level to approach the highest mark. When the insulating oil is cooled, it contracts and its volume decreases, causing the oil level in the tank to drop and the oil gauge pointer or oil level to approach the lowest mark.

[0004] Transformer oil temperature monitoring is a crucial step in ensuring its safe and stable operation. The following problems were found in the relevant technologies: Currently, most oil temperature gauges on the market are vertically installed. When the transformer is installed at a height of 3-4 meters, there are blind spots for maintenance personnel to observe the oil temperature gauge, making it inconvenient to read the readings. At the same time, the isolation effect between the oil temperature gauge and the transformer oil is not good, which easily leads to the risk of oil leakage. In addition, the installation compatibility of the magnetic coupling component is poor, affecting the accurate transmission of temperature signals. To address these issues, we propose a bent-neck magnetic coupling oil temperature gauge housing.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background section of this application, and therefore may include prior art information that does not constitute prior art information known to those skilled in the art. Utility Model Content

[0006] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies, and its specific technical solution is as follows: A curved-neck magnetic coupling oil temperature gauge housing includes a housing, a sealing element that mates with a cover on the top of the inner wall of the housing, a wiring port integrally formed therewith fixed to the side wall of the housing, and a limiting protrusion provided on the inner wall of the wiring port, an oil contact interface provided at the bottom of the housing, and the oil contact interface is connected to the housing via a curved-neck connecting part, and a temperature measuring magnetic disk for blocking oil flow is embedded in the inner wall of the curved-neck connecting part at the interface of the housing.

[0007] In the above technical solution, the bent neck connection is a flared transition structure, and the bent neck connection adopts a gradually changing wall thickness design.

[0008] The top of the inner wall of the watch case has a stepped interface.

[0009] The inner wall of the watch case is uniformly fixed with mating bosses that fit the bottom of the stepped interface.

[0010] The bottom of the oil contact interface is fixedly connected to a mating flange integrally formed therewith.

[0011] The mating flange has an avoidance notch, and the avoidance notch is arc-shaped.

[0012] The sealing element includes a sealing sub-ring fixed on a stepped interface and a sealing female ring fixed on the shell cover. The outer wall of the sealing female ring is provided with a groove that engages with the sealing sub-ring.

[0013] The inner wall of the stepped interface is uniformly fitted with stacked sealing rings, and the outer wall of the sealing ring is uniformly provided with matching grooves that mesh with the stacked sealing rings.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The flared transition structure of the bent neck connection 3 provides maintenance personnel with an observation angle that conforms to human vision habits, solves the problem of inconvenient observation of oil temperature gauge when the transformer is installed at a high height, and improves maintenance efficiency.

[0015] Second, the embedded temperature measuring magnetic disk enables magnetic coupling transmission of oil-side temperature signals to the meter side, and the limiting protrusion on the inner wall of the wiring port provides reliable limiting for the wiring part of the magnetic coupling component, ensuring the stability and accuracy of signal transmission.

[0016] Third, the gradual wall thickness design of the bent neck connection and the integrated molding structure of the oil contact interface and the docking flange enhance the overall structural strength of the casing and enable it to adapt to the vibration and load requirements of the transformer operating environment.

[0017] Fourth, the design of the clearance notch and stepped interface on the connecting flange allows it to adapt to the existing layout of the transformer, making the installation process simple and efficient without requiring any additional modifications to the transformer. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a bent-neck magnetic coupling oil temperature gauge housing according to this utility model. Figure I ; Figure 2 This is a schematic diagram of the structure of a bent-neck magnetic coupling oil temperature gauge housing according to this utility model. Figure II ; Figure 3 This is a schematic diagram of the structure of a bent-neck magnetic coupling oil temperature gauge housing according to this utility model. Figure III ; Figure 4 A cross-sectional view of the structure of the watch case and cover portion of this utility model. Figure I ; Figure 5 A cross-sectional view of the structure of the watch case and cover portion of this utility model. Figure II ; in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-Casing, 2-Oil contact interface, 3-Bent neck connection, 4-Wire connection port, 5-Limiting boss, 6-Mating boss, 7-Mating flange, 8-Allowing notch, 9-Stepped interface, 10-Sealing sub-ring, 11-Sealing female ring, 12-Match, 13-Layered sealing ring, 14-Adaptor slot, 15-Temperature measuring magnetic disk. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The following are specific implementation cases and appendices. Figure 1-5 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0021] A curved-neck magnetic coupling oil temperature gauge housing, characterized in that it includes a housing 1, the top of the inner wall of the housing 1 is provided with a sealing element that mates with a housing cover, and a wiring port 4 integrally formed therewith is fixed to the side wall of the housing 1, and the inner wall of the wiring port 4 is provided with a limiting protrusion 5. The limiting protrusion 5 is located at the innermost side of the wiring port 4, leading the oil gauge wiring out of the housing for connection, and the two limiting protrusions 5 are used to limit the oil gauge wiring. The bottom of the housing 1 is provided with an oil contact interface 2, and the oil contact interface 2 is connected to the housing 1 through a curved connecting part 3, and the inner wall of the curved connecting part 3 at the interface with the housing 1 is embedded with a temperature measuring magnetic disk 15 for blocking oil flow.

[0022] Oil contact interface 2 is used to connect to the transformer oil conservator. After the transformer oil is heated on the oil contact side, the temperature change will be transmitted to the temperature sensing elements such as temperature bulbs and thermistors, which are located on the oil contact side. In order to prevent oil leakage to the meter side, the oil contact side and the meter side are physically isolated by a magnetic disk. The magnetic disk completely separates the two sides, and oil cannot enter the meter side from the oil contact side.

[0023] After the temperature sensing element on the oil-contact side detects a change in oil temperature, it will cause the magnetic component on the oil-contact side to move in conjunction with the temperature sensing element. Due to the "non-contact transmission" characteristic of magnetic force, the displacement of the magnetic component on the oil-contact side will drive the magnetic component on the meter side and the oil meter pointer to move synchronously through the magnetic field. The movement of the magnetic component on the meter side directly causes the oil meter pointer to deflect. The scale of the oil meter is pre-calibrated according to the correspondence between "oil temperature - magnetic component displacement - pointer deflection". Therefore, maintenance personnel can directly read the real-time temperature of the transformer oil through the pointer position.

[0024] The bent-neck connection 3 is a flared transition structure with a gradually varying wall thickness. This design ensures structural strength while effectively dispersing stress and adapting to the vibration environment during transformer operation. Furthermore, the flared transition structure provides maintenance personnel with a good observation angle, solving the visibility problem during vertical installation.

[0025] The top of the inner wall of the watch case 1 has a stepped interface 9. The stepped interface 9 is designed to facilitate the mating and installation of the cover, and can play a preliminary positioning role for the cover, ensuring the mating accuracy between the cover and the watch case 1.

[0026] It is worth noting that the inner wall of the housing 1 is uniformly fixed with mating bosses 6 that fit against the bottom of the stepped interface. The mating bosses 6 are used to support the oil temperature gauge, ensuring that the oil temperature gauge is installed at a consistent height inside the housing 1, thus guaranteeing the accuracy of temperature measurement. The mating bosses 6 and the housing 1 are integrally formed, which ensures the overall stability.

[0027] In addition, the bottom of the oil contact interface 2 is fixedly connected to an integrally formed mating flange 7. The mating flange 7 is used to fix the entire housing to the transformer. The integrally formed structural design enhances the connection strength between the oil contact interface 2 and the mating flange 7, preventing breakage during installation or use.

[0028] In addition, a clearance notch 8 is provided on the connecting flange 7, and the clearance notch 8 is arc-shaped. The clearance notch 8 is designed to adapt to the existing component layout of the transformer, prevent the casing from interfering with other components of the transformer during installation, and improve the convenience and adaptability of installation.

[0029] Furthermore, the sealing element includes a sealing sub-ring 10 fixed to the stepped interface 9 and a sealing female ring 11 fixed to the housing cover. The outer wall of the sealing female ring 11 has a groove 12 that engages with the sealing sub-ring 10. This sealing structure, through the engagement of the sealing sub-ring 10 and the groove 12, forms the first line of defense, effectively preventing external dust and moisture from entering the interior of the watch case 1, while also preventing internal oil from leaking out.

[0030] The inner wall of the stepped interface 9 is uniformly fitted with stacked sealing rings 13, and the outer wall of the sealing ring 11 is uniformly provided with matching grooves 14 that mesh with the stacked sealing rings 13. The meshing of the stacked sealing rings 13 and the matching grooves 14 forms a second sealing line, further enhancing the sealing effect and ensuring the airtightness of the inside of the housing 1, providing a clean and stable working environment for the oil temperature gauge.

[0031] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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.

[0032] Furthermore, the terms “first,” “second,” “third,” and “fourth” 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 as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A magnetic coupling oil temperature gauge case with a bent neck, characterized in that, The device includes a watch housing (1), the top of the inner wall of the watch housing (1) is provided with a sealing element that mates with the cover, the side wall of the watch housing (1) is fixedly connected with a wiring port (4) integrally formed therewith, and the inner wall of the wiring port (4) is provided with a limiting protrusion (5), the bottom of the watch housing (1) is provided with an oil contact interface (2), and the oil contact interface (2) is connected to the watch housing (1) through a bent neck connection part (3), and the inner wall of the bent neck connection part (3) at the interface with the watch housing (1) is embedded with a temperature measuring magnetic disk (15) for blocking the flow of oil.

2. The curved-neck magnetic coupling oil temperature gauge housing according to claim 1, characterized in that: The bent neck connection (3) is a flared transition structure, and the bent neck connection (3) adopts a gradually changing wall thickness design.

3. The curved-neck magnetic coupling oil temperature gauge housing according to claim 1, characterized in that: The top of the inner wall of the watch case (1) is a stepped interface (9).

4. The curved-neck magnetic coupling oil temperature gauge housing according to claim 1, characterized in that: The inner wall of the watch case (1) is uniformly fixed with mating bosses (6) that fit the bottom of the stepped interface.

5. The curved-neck magnetic coupling oil temperature gauge housing according to claim 1, characterized in that: The bottom of the oil contact interface (2) is fixedly connected to a mating flange (7) integrally formed therewith.

6. The curved-neck magnetic coupling oil temperature gauge housing according to claim 5, characterized in that: The mating flange (7) has an avoidance notch (8), and the avoidance notch (8) is arc-shaped.

7. The curved-neck magnetic coupling oil temperature gauge housing according to claim 1, characterized in that: The sealing element includes a sealing sub-ring (10) fixed on the stepped interface (9) and a sealing mother ring (11) fixed on the shell cover. The outer wall of the sealing mother ring (11) is provided with a groove (12) that engages with the sealing sub-ring (10).

8. The curved-neck magnetic coupling oil temperature gauge housing according to claim 7, characterized in that: The inner wall of the stepped interface (9) is uniformly fitted with a stacked sealing ring (13), and the outer wall of the sealing ring (11) is uniformly provided with a matching groove (14) that meshes with the stacked sealing ring (13).

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