Temperature control protection device with copper pipe shielding special for dry-type transformer

Abstract

The utility model discloses a special temperature control protection device with a copper tube shield for a dry-type transformer, which relates to the technical field of temperature control protection of dry-type transformers and comprises a temperature control wire, a temperature sensor is connected with one end of the temperature control wire, and the temperature sensor and the temperature control wire are arranged in a temperature control assembly; the temperature control wire comprises a deep part, the deep part is arranged in the temperature control assembly and connected with the temperature sensor, and the connecting part is arranged at the end, away from the temperature sensor, of the deep part; a protection assembly is further included, a connecting part is arranged in the protection assembly, the protection assembly is connected with the temperature control assembly, and the protection assembly can achieve shielding protection of the connecting part. The special temperature control protection device with the copper pipe shielding function for the dry-type transformer can solve the problems that in the prior art, temperature display is abnormal and sensitivity is reduced due to the fact that a temperature control wire is prone to being interfered by an electromagnetic field.

Description

Technical Field

[0001] This utility model relates to the field of temperature control and protection technology for dry-type transformers, specifically a temperature control and protection device with copper tube shielding for dry-type transformers. Background Technology

[0002] Dry-type transformers are widely used in power systems, and temperature monitoring during their operation is crucial. Accurate temperature monitoring can promptly detect abnormal heating in the transformer, preventing equipment damage or even safety accidents caused by excessive temperature. Existing temperature control protection devices for dry-type phase-shifting rectifier transformers are typically installed inside the coils, using temperature control tubes for protection. The temperature control wires outside the temperature control tubes are usually protected by the shielding mesh provided by the temperature control wire manufacturer.

[0003] However, during routine power frequency withstand voltage tests on transformers, a strong power frequency electric field is generated in and around the transformer windings. Due to the presence of the shielding mesh, a high voltage is induced on the shielding mesh during the power frequency withstand voltage test. If the grounding of the shielding mesh is poor or there are other problems, the induced high voltage may not be discharged in time, resulting in the temperature control line being subjected to excessive voltage surges. This may damage the electronic components inside the temperature control line, preventing it from properly sensing temperature changes and converting them into electrical signals, or it may degrade the insulation performance of the temperature control line, causing interference to the signal transmission line, resulting in the temperature signal not being accurately transmitted to the display device. Ultimately, this leads to the inability to display the temperature or abnormal temperature sensitivity, affecting the normal operation of the temperature control protection device. Utility Model Content

[0004] The purpose of this invention is to provide a temperature control protection device with copper tube shielding specifically for dry-type transformers. This temperature control protection device with copper tube shielding specifically for dry-type transformers can solve the problem in the prior art that the temperature control line is easily affected by electromagnetic field interference, resulting in abnormal temperature display and reduced sensitivity.

[0005] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a temperature control protection device with copper tube shielding for dry-type transformers, including a temperature control line;

[0006] A temperature sensor, wherein the temperature sensor is connected to one end of the temperature control line;

[0007] A temperature control assembly, wherein the temperature control assembly includes the temperature sensor and the temperature control wire;

[0008] The temperature control line includes a penetration portion, which is disposed within the temperature control assembly and connected to the temperature sensor;

[0009] The connecting part is located at the end of the insertion part away from the temperature sensor;

[0010] It also includes a protection component, which has the connection part inside and is connected to the temperature control component. The protection component can provide shielding protection for the connection part.

[0011] In some embodiments, the protection component includes a fixing tube connected to the temperature control component;

[0012] A shielding layer is disposed inside the fixed tube and sleeved on the connecting part.

[0013] In some embodiments, the protective component further includes an insulating layer disposed between the shielding layer and the connection portion.

[0014] In some embodiments, the temperature control component includes a shielding tube, and the shielding tube is provided with the penetration portion and the temperature sensor;

[0015] A protective sleeve is fitted over the shielding tube;

[0016] A connecting ear plate is provided, which is connected to the shielding tube and extends into the protective sleeve.

[0017] A grounding support plate is fixedly connected to the connecting lug plate.

[0018] In some embodiments, the protection component further includes a connecting ring, which is sleeved on the shielding layer and connected to the shielding tube.

[0019] In some embodiments, the shielding tube is a copper tube or an aluminum tube.

[0020] In some embodiments, the shielding layer is an aluminum foil tightly wound around the insulating layer.

[0021] In some embodiments, the device further includes a Teflon tube disposed inside the shielding tube, and the Teflon tube contains the penetration portion and the temperature sensor.

[0022] In some embodiments, the connecting portion is inserted into the shielding tube at one end near the insertion portion.

[0023] In summary, this utility model has the following beneficial effects:

[0024] This invention utilizes copper or aluminum tubing as the shielding tube and tightly wound aluminum foil as the shielding layer to form a double-shielded structure on the temperature control line, effectively preventing interference from external electromagnetic fields. During routine transformer tests involving power frequency withstand voltage, a strong power frequency electric field induces charges on the shielding tube and shielding layer. Since both the shielding tube and shielding layer are reliably grounded via a grounding support plate, the induced charges are promptly discharged, preventing high voltage buildup from impacting the temperature control line. This solves the problem in existing technologies where temperature control lines are susceptible to electromagnetic interference, leading to abnormal temperature displays and reduced sensitivity.

[0025] This invention can effectively protect the temperature control line, preventing damage to the internal electronic components of the temperature control line from high voltage surges and electromagnetic interference, reducing the equipment failure rate, slowing down the aging of the equipment, extending the service life of the device, and reducing the maintenance cost of the equipment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle.

[0028] In the diagram: 1. Temperature control wire; 11. Deep insertion part; 12. Connecting part; 2. Temperature sensor; 3. Temperature control component; 31. Shielding tube; 32. Protective sleeve; 33. Connecting ear plate; 34. Grounding support plate; 4. Protection component; 41. Fixing tube; 42. Shielding layer; 43. Insulation layer; 44. Connecting ring; 5. Teflon tube. Detailed Implementation

[0029] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] refer to Figure 1-2A temperature control protection device with copper tube shielding for dry-type transformers includes a temperature control line 1, a temperature sensor 2, a temperature control component 3, and a protection component 4. The temperature sensor 2 is connected to one end of the temperature control line 1. The temperature sensor 2 can sense the temperature change inside the dry-type transformer in real time and convert the temperature signal into an electrical signal, which is then transmitted through the temperature control line 1. The temperature control component 3 contains the temperature sensor 2 and the temperature control line 1. The temperature control component 3 can insulate and shield the temperature sensor 2 and the temperature control line 1 to achieve temperature control protection. The temperature control line 1 includes a penetration part 11 and a connecting part 12. The penetration part 11 is located inside the temperature control component 3 and is connected to the temperature sensor 2. It can be welded together and can transmit the temperature signal sensed by the temperature sensor 2. The connecting part 12 is located at the end of the penetration part 11 away from the temperature sensor 2 and can further transmit the temperature signal transmitted by the penetration part 11 to subsequent processing equipment. This is prior art and will not be described in detail here. The protection component 4 contains the connecting part 12 and is connected to the temperature control component 3. The protection component 4 can shield and protect the connecting part 12.

[0031] In some embodiments, the protection component 4 includes a fixing tube 41, a shielding layer 42, and an insulating layer 43. The fixing tube 41 is connected to the temperature control component 3 and can provide an installation base and structural support for the entire protection component 4. The fixing tube 41 can be an epoxy tube, which can be fixed on the clamp to facilitate the routing of the temperature control line 1. The shielding layer 42 is disposed inside the fixing tube 41 and sleeved on the connecting part 12 to provide shielding protection for the connecting part 12.

[0032] In some embodiments, the protection component 4 further includes an insulating layer 43, which is disposed between the shielding layer 42 and the connecting portion 12. The insulating layer 43 may be an insulating paper tube, which can prevent the shielding layer 42 from directly contacting the connecting portion 12, avoid electrical short circuits, and ensure the normal operation of the temperature control line 1.

[0033] In some embodiments, the temperature control component 3 includes a shielding tube 31, a protective sleeve 32, a connecting lug 33, and a grounding support plate 34. The shielding tube 31 has an insertion part 11 and a temperature sensor 2 inside, which can provide a relatively enclosed space for the insertion part 11 and the temperature sensor 2, playing a preliminary shielding and protection role. The protective sleeve 32 is sleeved on the shielding tube 31, which can enhance the protection of the shielding tube 31 and its internal components, preventing external physical damage and environmental factors from affecting it. The protective sleeve 32 can be a high-voltage insulating heat shrink tubing. The connecting lug 33 is connected to the shielding tube 31 and extends into the protective sleeve 32. The grounding support plate 34 is fixedly connected to the connecting lug 33, which can reliably ground the shielding tube 31, so that the charge induced on the shielding tube 31 can be discharged in time, ensuring the stability of the shielding effect.

[0034] In some embodiments, the protection component 4 further includes a connecting ring 44, which is sleeved on the shielding layer 42 and connected to the shielding tube 31. The connecting ring 44 may be aluminum foil, which allows the protection component 4 and the temperature control component 3 to form a whole and both to be grounded, thereby further enhancing the shielding effect and structural stability.

[0035] In some embodiments, the shielding tube 31 is a copper tube or an aluminum tube. These two metal materials have good conductivity and shielding performance, which can effectively block interference from external electromagnetic fields. At the same time, copper tubes and aluminum tubes also have high strength and corrosion resistance, which can adapt to the complex operating environment of transformers.

[0036] In some embodiments, the shielding layer 42 may be an aluminum foil tightly wound around the insulating layer 43. The aluminum foil has good conductivity and flexibility, which can effectively shield the connection part 12 from interference by external electromagnetic fields, and the cost is low. At the same time, the tight winding method can ensure that there are no gaps between the shielding layer 42 and the insulating layer 43, thus ensuring the shielding effect.

[0037] In some embodiments, the device further includes a Teflon tube 5, which is disposed inside the shielding tube 31. The Teflon tube 5 has an indentation 11 and a temperature sensor 2 inside it. The Teflon tube 5 has good insulation properties and chemical stability, which can further improve the safety and reliability of the temperature control line 1 and the temperature sensor 2.

[0038] In some embodiments, the end of the connecting part 12 near the insertion part 11 is inserted into the shielding tube 31, which can make the connection of the temperature control line 1 tighter and more stable, and reduce interference during signal transmission.

[0039] The specific working principle is as follows:

[0040] After the temperature control protection device of this utility model is installed, when the transformer is running, the temperature sensor 2 senses the temperature change inside the dry-type transformer in real time and converts the temperature signal into an electrical signal. This electrical signal is transmitted to the display device through the insertion part 11 and the connection part 12 of the temperature control line 1.

[0041] During normal operation, the shielding tube 31 and shielding layer 42 effectively shield against interference from external electromagnetic fields, ensuring accurate transmission of temperature signals. During the power frequency withstand voltage test in routine transformer testing, even if a strong power frequency electric field is generated, the charge induced on the shielding tube 31 and shielding layer 42 can be discharged in time through the grounding support plate 34, avoiding impact on the temperature control line 1.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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 utility model.

Claims

1. A temperature control protection device with copper tube shielding for dry-type transformers, comprising a temperature control line (1); Temperature sensor (2), the temperature sensor (2) is connected to one end of the temperature control line (1); Temperature control component (3), wherein the temperature control component (3) is provided with the temperature sensor (2) and the temperature control line (1); characterized in that: The temperature control line (1) includes a penetration part (11), which is located inside the temperature control assembly (3) and connected to the temperature sensor (2); A connecting part (12) is provided at the end of the penetration part (11) away from the temperature sensor (2); It also includes a protection component (4), which has the connection part (12) inside and is connected to the temperature control component (3). The protection component (4) can provide shielding protection for the connection part (12).

2. The temperature control protection device with copper tube shielding for dry-type transformers according to claim 1, characterized in that: The protection component (4) includes a fixing tube (41), which is connected to the temperature control component (3); The shielding layer (42) is disposed inside the fixed tube (41) and sleeved on the connecting part (12).

3. A temperature control protection device with copper tube shielding for dry-type transformers according to claim 2, characterized in that: The protective component (4) further includes an insulating layer (43) disposed between the shielding layer (42) and the connecting portion (12).

4. A temperature control protection device with copper tube shielding for dry-type transformers according to claim 2, characterized in that: The temperature control component (3) includes a shielding tube (31), and the shielding tube (31) is provided with the indentation (11) and the temperature sensor (2). A protective sleeve (32) is fitted onto the shielding tube (31); Connecting ear plate (33), the connecting ear plate (33) is connected to the shielding tube (31) and extends into the protective sleeve (32); Grounding support plate (34), which is fixedly connected to the connecting ear plate (33).

5. A temperature control protection device with copper tube shielding for dry-type transformers according to claim 4, characterized in that: The protection component (4) also includes a connecting ring (44), which is sleeved on the shielding layer (42) and connected to the shielding tube (31).

6. A temperature control protection device with copper tube shielding for dry-type transformers according to claim 4, characterized in that: The shielding tube (31) is a copper tube or an aluminum tube.

7. A temperature control protection device with copper tube shielding for dry-type transformers according to claim 3, characterized in that: The shielding layer (42) is an aluminum foil tightly wrapped around the insulating layer (43).

8. A temperature control protection device with copper tube shielding for dry-type transformers according to claim 4, characterized in that: It also includes a Teflon tube (5), which is disposed inside the shielding tube (31), and the Teflon tube (5) is provided with the indentation (11) and the temperature sensor (2).

9. A temperature control protection device with copper tube shielding for dry-type transformers according to claim 4, characterized in that: The connecting part (12) is inserted into the shielding tube (31) at one end near the deep part (11).

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