Transformer oil temperature sensing probe and transformer temperature controller

Abstract

The utility model provides a transformer oil temperature sensing probe and a transformer temperature controller, the transformer oil temperature sensing probe is used for transformer oil temperature detection, the design of the temperature sensing probe enables the installation process to be simple and fast, and the installation time and cost can be reduced; the protective sleeve on the temperature sensing probe can be detached and reinstalled according to needs, and the protective sleeve is easy to install and detachable, so that the maintenance work becomes more efficient, and meanwhile, the maintenance cost and time are also reduced; the position design of the temperature sensor is reasonable, and the thermal bulb and the temperature sensor are arranged in parallel, so that more accurate temperature measurement can be provided.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a transformer oil temperature sensing probe and a transformer temperature controller. Background Art

[0002] Transformers are indispensable key equipment in power systems. Their main function is to achieve voltage conversion to meet the transmission and distribution needs of different voltage levels. The stable operation of transformers is crucial to ensuring the reliability of the entire power system. Among them, the temperature control of transformer oil is one of the key factors to ensure the safe operation of transformers. The temperature of transformer oil is directly related to the thermal stability and insulation performance inside the transformer. Excessive temperature may cause aging of the insulation material and increase the risk of failure, while too low temperature may affect the fluidity of the transformer oil, thereby affecting the cooling effect. Therefore, accurate temperature monitoring and control are essential for the stable operation and maintenance of transformers.

[0003] At present, traditional transformer temperature controllers usually consist of two parts: a mechanical thermometer and a digital temperature display. The mechanical thermometer measures temperature through the principle of physical expansion or contraction, while the digital display obtains temperature data through electronic sensors and converts it into digital signals for display. However, when measuring the temperature in the actual transformer thermostat, there may be errors between the mechanical and digital temperature measurement devices, resulting in inconsistent readings, which affects the accuracy of temperature control and further affects the stable operation and maintenance decisions of the transformer. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides a transformer oil temperature sensing probe and a transformer temperature controller, which are used to solve the problem of temperature measurement errors caused by inconsistency between the mechanical part and the digital part when measuring temperature in a transformer thermostatic bath in the prior art.

[0005] In order to solve the above technical problems, the utility model provides a transformer oil temperature sensing probe for transformer oil temperature detection, comprising: a protective sleeve, the protective sleeve comprising a temperature sensing cavity, and one end of the protective sleeve is sealed, and the other end is provided with an opening connected to the temperature sensing cavity; a temperature sensing component, the temperature sensing component comprising a temperature bulb and a strip temperature sensor, the temperature bulb and the strip temperature sensor are arranged in parallel in the temperature sensing cavity, and an expansion medium is arranged in the temperature bulb; a mounting seal, the mounting seal covers the other end of the protective sleeve; a capillary tube and a signal cable, the capillary tube and the signal cable pass through the mounting seal, the capillary tube is connected to the temperature bulb, and the signal cable is electrically connected to the strip temperature sensor; when the oil temperature changes, since the temperature bulb and the strip temperature sensor are arranged in parallel, the temperature bulb and the strip temperature sensor can synchronously detect the temperature change, and while the volume of the expansion medium in the temperature bulb changes and transmits a mechanical signal to the outside through the capillary tube, the strip temperature sensor can transmit a digital signal to the outside through the signal cable.

[0006] As a more preferred embodiment, the transformer oil temperature sensing probe further includes an extension tube, the capillary tube and the signal cable are arranged in the extension tube, one end of the extension tube passes through the installation seal and extends into the temperature sensing cavity, and the other end is led out from the installation seal.

[0007] As a more preferred manner, the temperature package and the extension tube are welded via an upper plug.

[0008] As a more preferred embodiment, the upper plug adopts a conical structure.

[0009] As a more preferred manner, the extension tube is provided with an extension tube opening; the extension tube opening is used for leading out the signal cable.

[0010] As a more preferred embodiment, an extension tube joint is provided at one end of the extension tube extending from the installation seal; the extension tube joint is used for connecting a protective metal hose.

[0011] As a more preferred embodiment, the installation seal includes a sealing fastening nut and a mounting nut; the sealing fastening nut covers the other end of the protective sleeve; the mounting nut installs the protective sleeve and clips the transformer oil temperature sensing probe onto the transformer oil tank.

[0012] As a more preferred manner, one end of the protective sleeve is sealed by a lower plug.

[0013] As a more preferred embodiment, the strip temperature sensor is a platinum resistor.

[0014] In order to solve the above problem, the present invention further provides a transformer temperature controller, comprising the transformer oil temperature sensing probe as described in any one of the claims.

[0015] As described above, the transformer oil temperature sensing probe and transformer temperature controller of the utility model have the following beneficial effects:

[0016] The design of the temperature sensing probe of the utility model makes its installation process simple and quick, which can reduce installation time and cost; the protective sleeve on the temperature sensing probe can be disassembled and reinstalled as needed, and the easy installation and disassembly of the protective sleeve make maintenance work more efficient, while also reducing maintenance costs and time; the position design of the temperature sensor is reasonable, and the parallel arrangement of the temperature bag and the temperature sensor can provide more accurate temperature measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic structural diagram of a traditional transformer oil temperature sensing probe in one embodiment of the utility model.

[0018] Figure 2 Shown is a schematic structural diagram of a transformer oil temperature sensing probe in one embodiment of the utility model.

[0019] Figure 3 Shown is a structural schematic diagram of a mounting nut of a transformer oil temperature sensing probe in one embodiment of the utility model.

[0020] Component number description

[0021] 1 Protective sleeve

[0022] 2 Temperature package

[0023] 3 Strip Temperature Sensor

[0024] 4 Install the seal

[0025] 41 Sealing fastening nut

[0026] 42 Mounting nut

[0027] 421 First snap nut

[0028] 422 Second snap nut

[0029] 5 Extension tube

[0030] 6. Put on the plug

[0031] 7 Extension tube opening

[0032] 8 Extension pipe joint

[0033] 9. Lower the plug

[0034] 33 Transformer oil tank DETAILED DESCRIPTION

[0035] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0036] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in this utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terms used here are only for describing specific embodiments and are not intended to limit this application. Spatial related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., can be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "hold" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless there is an indication to the contrary in the context. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions or operations is inherently mutually exclusive in some way.

[0039] In order to make the purpose, technical solution and advantages of the utility model more clear, the technical solution in the embodiment of the utility model is further described in detail through the following embodiments and the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0040] like Figure 2 As shown, a schematic diagram of the structure of a transformer oil temperature sensing probe in an embodiment of the utility model is shown. The structure of the transformer oil temperature sensing probe in this embodiment mainly includes:

[0041] A protective sleeve 1, wherein the protective sleeve 1 comprises a temperature sensing cavity, and one end of the protective sleeve 1 is sealed, and the other end is provided with an opening communicating with the temperature sensing cavity;

[0042] A temperature sensing component, the temperature sensing component comprises a temperature bulb 2 and a strip temperature sensor 3, the temperature bulb 2 and the strip temperature sensor 3 are arranged in parallel in the temperature sensing cavity, and an expansion medium is arranged in the temperature bulb 2;

[0043] Installing a seal 4, wherein the installing seal 4 covers the other end of the protective sleeve 1;

[0044] A capillary tube and a signal cable, wherein the capillary tube and the signal cable pass through the mounting seal 4, the capillary tube is connected to the temperature bulb 2, and the signal cable is electrically connected to the strip temperature sensor 3;

[0045] When the oil temperature changes, since the temperature bag 2 and the strip temperature sensor 3 are arranged in parallel, the temperature bag 2 and the strip temperature sensor 3 can synchronously detect the temperature change. While the volume of the expansion medium in the temperature bag 2 changes and transmits mechanical signals to the outside through the capillary, the strip temperature sensor 3 can transmit digital signals to the outside through the signal cable.

[0046] It needs to be explained that, combined with Figure 1It is explained that the conventional temperature sensing probe is usually composed of a temperature sensor 3 and a temperature bulb 2, and the temperature sensor 3 is arranged above the temperature bulb 2. When the temperature sensing probe is inserted into the transformer oil tank 33 for temperature measurement, if the temperature sensing probe is fully inserted into the transformer oil tank 33, that is, the temperature sensor 3 and the temperature bulb 2 are both immersed in the transformer oil, since the oil temperature may have a temperature gradient in the vertical direction, the oil temperature measured by the temperature bulb 2 is different from the oil temperature measured by the temperature sensor 3, resulting in inconsistent temperature display between the mechanical part and the digital part; if the temperature sensing probe is partially inserted into the transformer oil tank 33, there may be a part of the temperature sensor 3 on the temperature sensing probe exposed outside the transformer oil, that is, part of the temperature sensor 3 is exposed to the environment, which will be affected by the external environment temperature, and the change of the oil temperature in the vertical direction can easily lead to inconsistent temperatures measured by the mechanical part and the digital part, thereby causing temperature measurement errors.

[0047] like Figure 2 As shown, the embodiment of the utility model proposes a transformer oil temperature sensing probe in which a temperature bag 2 and a strip temperature sensor 3 are arranged in parallel. When the temperature sensing probe is used to measure the transformer oil temperature, the temperature bag 2 and the strip temperature sensor 3 are in parallel positions, and the temperature change contacts the transformer oil temperature in the vertical direction, so that the mechanical signal generated by the temperature bag 2 is consistent with the digital signal generated by the strip temperature sensor 3, thereby reducing the temperature measurement error of the transformer oil temperature.

[0048] Furthermore, the transformer oil temperature sensing probe of the embodiment of the utility model also includes a protective sleeve 1, through which the temperature package 2 and the strip temperature sensor 3 can be covered in its temperature sensing cavity to protect the temperature package 2 and the strip temperature sensor 3 from being disturbed by the external environment, thereby improving the service life and avoiding damage. At the same time, the transformer oil temperature sensing probe can choose whether to cover the protective sleeve 1 according to actual conditions. When the transformer oil temperature sensing probe works under normal conditions, it can choose not to cover the protective sleeve 1, which is simple to install, easy to operate, saves installation time, and the temperature detection result is more accurate. However, if the transformer oil temperature sensing probe works under abnormal conditions, it can cover the protective sleeve 1 to protect the temperature package 2 and the strip temperature sensor 3 from being affected by the harsh environment, thereby extending the service life and improving the measurement accuracy.

[0049] It should be noted that the protective sleeve of the temperature sensing probe of the present invention provides physical and chemical protection for the temperature bag and temperature sensor in its temperature sensing cavity, ensuring that they can operate stably in harsh working environments and be protected from the influence of the external environment. The material of the protective sleeve can be selected from high temperature resistant, corrosion resistant, impact resistant, and wear resistant metal materials, and the embodiments of the present invention are not limited thereto.

[0050] The temperature bag is provided with an expansion medium, which is a key component in the temperature measurement device. It expands and contracts according to temperature changes, thereby producing measurable physical changes. The expansion medium can be a liquid expansion medium or a gas expansion medium. The advantage of the liquid expansion medium is that it has a large heat capacity and good thermal conductivity, and the advantage of the gas expansion medium is that its thermal expansion and contraction effect is more significant, and it can provide a rapid temperature response. The expansion medium can be selected according to actual conditions, and the embodiments of the present application are not limited thereto.

[0051] In this embodiment, if Figure 2 As shown, the transformer oil temperature sensing probe also includes an extension tube 5, the capillary tube and the signal cable are arranged in the extension tube 5, one end of the extension tube 5 passes through the installation seal 4 and extends into the temperature sensing cavity, and the other end is led out from the installation seal 4.

[0052] The extension tube 5 provides protection and a guide path for the capillary tube and the signal cable. The capillary tube can be used to accurately control the flow of the fluid and can be used to control the injection of the expansion medium. The signal cable is used to transmit the signal detected by the strip temperature sensor 3 and transmit the temperature information to the monitoring system or control system. The capillary tube and the signal cable pass through the mounting seal 4 and extend into the temperature sensing cavity to sense the temperature of the transformer oil. By protecting the internal capillary tube and the signal cable through the extension tube 5, accurate signal transmission and long-term stable operation of the equipment can be ensured.

[0053] In this embodiment, if Figure 2 As shown, the temperature package 2 and the extension tube 5 are welded through an upper plug 6.

[0054] It should be noted that there is a welding part between the temperature bag 2 and the extension tube 5, through which the temperature bag 2 and the extension tube 5 can be connected together. At the same time, an upper plug 6 is welded at the welding part to make the temperature bag 2 and the extension tube 5 conductive, and the upper plug 6 can inject expansion medium into the temperature bag 2.

[0055] In this embodiment, if Figure 2 As shown, the upper plug 6 adopts a conical structure.

[0056] It should be explained that the upper stopper in this embodiment adopts a conical structure. The conical structure uses the principle of height difference during the liquid injection process, which can help to completely discharge the gas from the temperature bag and ensure that there are no bubbles in the temperature bag, thereby improving the accuracy of temperature measurement. The conical structure usually means that the path of liquid flow is smoother, reducing the dead corners where the liquid may stay and form bubbles; the design of the conical structure can promote the flow of liquid, thereby helping bubbles to rise and be discharged; the conical structure usually has a larger surface area than the cylindrical structure, which facilitates the exchange of liquid and gas, thereby facilitating the release of bubbles; the conical structure is narrower at the top, which can reduce the pressure above the liquid, which helps the bubbles to rise and discharge; the conical structure can reduce the time required for the liquid to fill the container, thereby reducing the chance of bubble formation; the conical structure makes it easier to observe the dynamics of bubbles in the liquid, which helps to make timely adjustments during the liquid injection process to reduce bubbles. The use of a conical structure can help optimize the production process and improve purity and consistency by reducing bubbles.

[0057] In this embodiment, if Figure 2 As shown, the extension tube 5 is provided with an extension tube opening 7; the extension tube opening 7 is used to lead out the signal cable.

[0058] It should be noted that the extension tube opening 7 is a hole on the extension tube 5. The extension tube opening 7 is opened on the extension tube 5 to allow the signal cable to pass through. The signal cable is led out from the inside of the extension tube 5 through the extension tube opening 7 and is connected to the strip temperature sensor 3. The protective sleeve 1 covers the led-out strip temperature sensor 3 and the temperature package 2. The sealing of the extension tube 5 will not be affected to prevent the external environment from causing damage to the internal components. At the same time, the existence of the extension tube opening 7 may also facilitate the installation, maintenance or replacement of the signal cable, and enable the temperature sensor to effectively transmit the temperature signal while keeping the internal components safe and sealed.

[0059] In this embodiment, if Figure 2 As shown, an extension tube joint 8 is provided at one end of the extension tube 7 extending from the installation seal 4; the extension tube joint 8 is used to connect the protective metal hose.

[0060] It should be noted that one end of the extension tube 7 is connected to the mechanical part of the transformer oil temperature sensing probe after being led out from the installation seal 4. At this time, the extension tube 7 is provided with an extension tube joint 8, which is connected to a metal hose through the extension tube joint 8, and is connected to the mechanical part of the transformer oil temperature sensing probe through the metal hose. When the temperature package 2 senses the change in transformer oil temperature, the expansion medium in the temperature package 2 changes in volume according to the principle of thermal expansion and contraction, driving the mechanical part to change, thereby measuring the temperature of the transformer oil.

[0061] In this embodiment, if Figure 2 and Figure 3As shown, the installation seal 4 includes a sealing fastening nut 41 and a mounting nut 42; the sealing fastening nut 41 covers the other end of the protective sleeve 1; the mounting nut 42 installs the protective sleeve 1 and buckles the transformer oil temperature sensing probe on the transformer oil tank.

[0062] The other end of the protective sleeve 1 is provided with an opening communicated with the temperature sensing cavity, and the other end of the protective sleeve 1 is sealed by a sealing fastening nut 41; the other end of the protective sleeve 1 is installed on the transformer oil temperature sensing probe by the second buckle nut 422 on the mounting nut 42, at which time the protective sleeve 1 can cover the temperature bag 2 and the strip temperature sensor 3 in its temperature sensing cavity to protect the temperature bag 2 and the strip temperature sensor 3; the first buckle nut 421 on the mounting nut 42 buckles the transformer oil temperature sensing probe on the transformer oil tank, so that the temperature sensing component of the transformer oil temperature sensing probe can be extended into the transformer oil to detect the transformer oil temperature.

[0063] In this embodiment, if Figure 2 As shown, one end of the protective sleeve 1 is sealed by a lower plug 9. The lower plug 9 is used to seal the end of the protective sleeve 1 to prevent dust, moisture or other external substances from entering the components, so that the transformer oil temperature sensing probe can be used under various working conditions.

[0064] In this embodiment, if Figure 2 As shown, the strip temperature sensor 3 is a platinum resistor.

[0065] It should be explained that the Platinum Resistance Thermometer (PRT) is a specific type that uses the property of the resistance of platinum material changing with temperature to measure temperature. Platinum is a metal with high purity and stability, and its linear change of resistance with temperature is very accurate. Therefore, platinum resistance temperature sensors are widely used in the field of high-precision temperature measurement, especially in industrial and scientific research environments that require long-term stability and reliability.

[0066] Platinum resistance temperature sensors are usually made of a platinum wire that can be consistent with the length of the temperature bulb and can be set in parallel with the temperature bulb. Platinum resistance temperature sensors are widely used in laboratories, industrial process control, weather stations and other occasions requiring accurate temperature measurement due to their high accuracy, stability and repeatability.

[0067] In this embodiment, the capillary tube is provided with an expansion medium that is consistent with the temperature bulb 2. When measuring the transformer oil temperature, the capillary tube expands or contracts in the same volume as the temperature bulb 2 under the influence of the same temperature due to the same expansion medium.

[0068] The utility model also provides a transformer temperature controller, comprising the transformer oil temperature sensing probe as described above.

[0069] It should be emphasized that the design of the temperature sensing probe in the embodiment of the utility model makes its installation process simple and quick, which can reduce installation time and cost; the protective sleeve on the temperature sensing probe can be removed and reinstalled as needed, and the easy installation and removability of the protective sleeve make maintenance work more efficient, while also reducing maintenance costs and time; the position of the temperature sensor is reasonably designed, and the parallel arrangement of the temperature bag and the temperature sensor can provide more accurate temperature measurement.

[0070] In summary, the utility model provides a transformer oil temperature sensing probe and a transformer temperature controller, the transformer oil temperature sensing probe is used for transformer oil temperature detection, comprising: a protective sleeve, the protective sleeve comprising a temperature sensing cavity, one end of the protective sleeve is sealed, and the other end is provided with an opening connected to the temperature sensing cavity; a temperature sensing component, the temperature sensing component comprises a temperature bulb and a strip temperature sensor, the temperature bulb and the strip temperature sensor are arranged in parallel in the temperature sensing cavity, and an expansion medium is arranged in the temperature bulb; a mounting seal, the mounting seal covers the other end of the protective sleeve; a capillary tube and a signal cable, the capillary tube and the signal cable pass through the mounting seal, the capillary tube is connected to the temperature bulb, and the signal cable is electrically connected to the strip temperature sensor; when the oil temperature changes, since the temperature bulb and the strip temperature sensor are arranged in parallel, the temperature bulb and the strip temperature sensor can synchronously detect the temperature change, and while the volume of the expansion medium in the temperature bulb changes and transmits a mechanical signal to the outside through the capillary tube, the strip temperature sensor can transmit a digital signal to the outside through the signal cable.

[0071] The design of the temperature sensing probe of the utility model makes its installation process simple and quick, which can reduce the installation time and cost; the protective sleeve on the temperature sensing probe can be disassembled and reinstalled as needed, and the easy installation and detachability of the protective sleeve make the maintenance work more efficient, while also reducing the maintenance cost and time; the position design of the temperature sensor is reasonable, and the parallel arrangement of the temperature package and the temperature sensor can provide more accurate temperature measurement. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0072] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A transformer oil temperature sensing probe for transformer oil temperature detection, characterized in that: include: A protective sleeve (1), the protective sleeve (1) comprising a temperature sensing cavity, one end of the protective sleeve (1) being sealed, and the other end being provided with an opening communicating with the temperature sensing cavity; A temperature sensing component, the temperature sensing component comprising a temperature bag (2) and a strip-shaped temperature sensor (3), the temperature bag (2) and the strip-shaped temperature sensor (3) being arranged in parallel in the temperature sensing cavity, and an expansion medium being arranged in the temperature bag (2); An installation seal (4) is installed, wherein the installation seal (4) covers the other end of the protective sleeve (1); A capillary tube and a signal cable, wherein the capillary tube and the signal cable pass through the mounting seal (4), the capillary tube is connected to the temperature package (2), and the signal cable is electrically connected to the strip temperature sensor (3); When the oil temperature changes, since the temperature bag (2) and the strip temperature sensor (3) are arranged in parallel, the temperature bag (2) and the strip temperature sensor (3) can synchronously detect the temperature change. When the volume of the expansion medium in the temperature bag (2) changes and transmits a mechanical signal to the outside through the capillary tube, the strip temperature sensor (3) can transmit a digital signal to the outside through the signal cable.

2. The transformer oil temperature sensing probe according to claim 1 is characterized in that: The transformer oil temperature sensing probe further comprises an extension tube (5), the capillary tube and the signal cable are arranged in the extension tube (5), one end of the extension tube (5) passes through the installation seal (4) and extends into the temperature sensing cavity, and the other end is led out from the installation seal (4).

3. The transformer oil temperature sensing probe according to claim 2 is characterized in that: The temperature package (2) and the extension tube (5) are welded via an upper plug (6).

4. The transformer oil temperature sensing probe according to claim 3 is characterized in that: The upper plug (6) adopts a conical structure.

5. The transformer oil temperature sensing probe according to claim 2 is characterized in that: The extension tube (5) is provided with an extension tube opening (7); the extension tube opening (7) is used to lead out the signal cable.

6. The transformer oil temperature sensing probe according to claim 2, characterized in that: An extension pipe joint (8) is provided at one end of the extension pipe (5) extending from the installation seal (4); the extension pipe joint (8) is used to connect a protective metal hose.

7. The transformer oil temperature sensing probe according to claim 1, characterized in that: The installation seal (4) comprises a sealing fastening nut (41) and a mounting nut (42); the sealing fastening nut (41) covers the other end of the protective sleeve (1); the mounting nut (42) installs the protective sleeve (1) and clips the transformer oil temperature sensing probe onto the transformer oil tank.

8. The transformer oil temperature sensing probe according to claim 1, characterized in that: One end of the protective sleeve (1) is sealed by a lower plug (9).

9. The transformer oil temperature sensing probe according to claim 1, characterized in that: The strip-shaped temperature sensor (3) is a platinum resistor.

10. A transformer temperature controller, characterized in that: It comprises a transformer oil temperature sensing probe as claimed in any one of claims 1 to 9.

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