High-precision oil temperature rod
By designing a high-precision oil temperature probe and utilizing the high thermal conductivity of quartz sand and weather-resistant materials, accurate real-time monitoring and remote uploading of the transformer's internal oil temperature were achieved. This solved the problems of time-consuming, labor-intensive, and inaccurate monitoring in existing technologies, and improved the stability and safety of the equipment.
Patent Information
- Application Number
- CN202421189177.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-28
AI Technical Summary
Existing methods for monitoring transformer oil temperature are time-consuming, labor-intensive, and lack accuracy, making it impossible to achieve remote real-time monitoring. This results in the inability to take timely protective measures when transformer oil temperature is abnormal, affecting the stable operation and safety of the equipment.
A high-precision oil temperature probe is designed, employing a sensor housing, temperature sensor probe, gasket, aviation socket, aviation plug, and wire linkage to ensure stable installation. Combined with the high thermal conductivity and weather-resistant properties of quartz sand, it achieves accurate temperature measurement and remote data transmission.
It enables high-precision real-time monitoring of the transformer's internal oil temperature, ensuring stable equipment operation, reducing errors, supporting remote data upload, and improving equipment safety and service life.
Smart Images
Figure CN222336586U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of transformer oil temperature detection, and in particular relates to a high-precision oil temperature rod. Background Art
[0002] Transformer oil is an important insulating medium inside the transformer. It can resist the effects of various electrical stress electric fields, magnetic fields and thermal fields inside the transformer. However, the dielectric strength of transformer oil decreases with the increase of oil temperature, so the normal state of oil temperature is crucial to maintain the stable operation of the transformer.
[0003] When the oil temperature inside the transformer is too high, it will not only damage the transformer insulating oil, but also cause damage to other equipment components. Under long-term high temperature conditions, the oil inside the transformer will shorten its service life and may also accelerate the aging of the transformer, greatly reducing the safety of the equipment.
[0004] When the oil temperature inside the transformer is too low, the electrical insulation performance may also decrease. In a low temperature environment, the viscosity of the oil will increase and the fluidity will be poor, which will affect the normal operation of the transformer. In addition, low temperature environments may also cause condensation inside the equipment, further increasing the risk of transformer failure.
[0005] In order to maintain the stable state of transformer oil temperature, it is necessary to monitor the transformer oil temperature. There are many ways to monitor transformer oil temperature, such as using transformer oil temperature probe for real-time monitoring, using thermal infrared thermometer, and using pointer-type thermometer for regular inspection. By monitoring the transformer oil temperature, abnormal changes in the transformer oil temperature can be discovered in time, and corresponding protective measures can be taken, such as reducing load power or increasing cooling, refueling, changing oil, etc., which can effectively protect the transformer and extend its service life.
[0006] In short, the transformer oil temperature is one of the key factors for the normal operation of the transformer. Only by ensuring that the transformer oil temperature is within the normal range can the stable operation of the transformer be guaranteed and unnecessary equipment failures and safety accidents can be avoided.
[0007] 1. Use thermal infrared thermometer
[0008] This method requires operation and maintenance personnel to regularly go to the site for measurement, which is time-consuming and labor-intensive. At the same time, this method can only measure the temperature of the oil tank surface, and the error is large.
[0009] 2. Use pointer type thermometer
[0010] It can measure the oil temperature of the transformer more accurately, but the reading is not intuitive and has errors. At the same time, the pointer thermometer is a mechanical meter and cannot upload the local oil temperature data to the background, so it is impossible to remotely understand the on-site oil temperature conditions.
[0011] Therefore, further improvements are made to the above problems. Utility Model Content
[0012] The main purpose of the utility model is to provide a high-precision oil temperature rod, which is linked by a sensor housing, a temperature sensor probe, a gasket, an aviation socket, an aviation plug and an electric wire, so as to detect the temperature of the transformer oil after stable installation. The utility model has the advantages of stable structure, high safety, high precision and high practicality.
[0013] In order to achieve the above purpose, the utility model provides a high-precision oil temperature rod for measuring the oil temperature inside the transformer, including a sensor housing, a temperature sensor probe, a gasket, an aviation socket, an aviation plug and a wire, wherein:
[0014] The sensor housing includes an integrally formed connection component and a probe placement component, wherein a first accommodating cavity is provided inside the connection component, an external thread structure (for installation at a preset detection position) is provided on a side of the connection component close to the probe placement component, and a first connection hole, a second connection hole, a third connection hole and a fourth connection hole are provided on an end of the connection component away from the probe placement component; a second accommodating cavity is provided inside the probe placement component, and the first accommodating cavity is communicated with the second accommodating cavity;
[0015] The temperature sensor probe is installed in the second accommodating cavity and the second accommodating cavity is filled with quartz sand;
[0016] One end of the aviation socket is connected to an end of the connection assembly away from the probe placement assembly through the gasket, and the aviation socket is provided with a fifth connection hole, a sixth connection hole, a seventh connection hole and an eighth connection hole, the fifth connection hole is aligned with the first connection hole, the sixth connection hole is aligned with the second connection hole, the seventh connection hole is aligned with the third connection hole, and the eighth connection hole is aligned with the fourth connection hole;
[0017] The aviation plug is connected to an end of the aviation socket away from the connecting assembly, and one end of the wire is electrically connected to an end of the aviation plug away from the aviation socket.
[0018] As a further preferred technical solution of the above technical solution, the sensor housing also includes a sealing ring, which is sleeved on the connecting assembly and is located on the side of the external thread structure away from the probe placement assembly (the sealing ring is used to improve the stability when connected to a preset detection position).
[0019] As a further preferred technical solution of the above technical solution, the aviation plug is provided with a wire clamp (the tightness of the wire clamp can be adjusted to meet the needs of wires of different sizes).
[0020] As a further preferred technical solution of the above technical solution, the gasket is provided with a first through hole, a second through hole, a third through hole and a fourth through hole, the first bolt passes through the fifth connecting hole, the first through hole and the first connecting hole in sequence, the second bolt passes through the sixth connecting hole, the second through hole and the second connecting hole in sequence, the third bolt passes through the seventh connecting hole, the third through hole and the third connecting hole in sequence, and the fourth bolt passes through the eighth connecting hole, the fourth through hole and the fourth connecting hole in sequence (to improve structural strength).
[0021] As a further preferred technical solution of the above technical solution, the other end of the wire is connected to a host computer (oil temperature controller). BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural schematic diagram of a high-precision oil temperature rod of the utility model.
[0023] Figure 2 It is a structural schematic diagram of a high-precision oil temperature rod of the utility model.
[0024] Figure 3 It is a structural schematic diagram of a high-precision oil temperature rod of the utility model (the sensor housing is hidden).
[0025] Figure 4 The utility model is a schematic diagram of the structure of a sensor housing of a high-precision oil temperature rod.
[0026] Figure 5 The utility model is a structural schematic diagram of a gasket of an aviation socket of a high-precision oil temperature rod.
[0027] Figure 6 It is an exploded view of a high-precision oil temperature rod of the utility model.
[0028] The reference numerals include: 100, sensor housing; 110, connecting assembly; 111, first accommodating cavity; 112, external thread structure; 113, first connecting hole; 114, second connecting hole; 115, third connecting hole; 116, fourth connecting hole; 120, probe placement assembly; 121, second accommodating cavity; 122, quartz sand; 130, sealing ring; 200, temperature sensor probe; 300, gasket; 310, first through hole; 320, second through hole; 330, third through hole; 340, fourth through hole; 350, first bolt; 360, second bolt; 370, third bolt; 380, fourth bolt; 400, aviation socket; 410, fifth connecting hole; 420, sixth connecting hole; 430, seventh connecting hole; 440, eighth connecting hole; 500, aviation plug; 510, wire clamp; 600, electric wire. DETAILED DESCRIPTION
[0029] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.
[0030] The utility model discloses a high-precision oil temperature rod. The specific embodiments of the utility model are further described below in conjunction with preferred embodiments.
[0031] In the embodiments of the present invention, those skilled in the art will note that the transformer and host computer involved in the present invention may be regarded as prior art.
[0032] Preferred embodiments.
[0033] like Figure 1-6 As shown, the utility model discloses a high-precision oil temperature rod for measuring the oil temperature inside a transformer, comprising a sensor housing 100, a temperature sensor probe 200, a gasket 300, an aviation socket 400, an aviation plug 500 and a wire 600, wherein:
[0034] The sensor housing 100 includes an integrally formed connection component 110 and a probe placement component 120, wherein a first accommodating cavity 111 is provided inside the connection component 110, an external thread structure 112 (for installation at a preset detection position) is provided on a side of the connection component 110 close to the probe placement component 120, and a first connection hole 113, a second connection hole 114, a third connection hole 115 and a fourth connection hole 116 are provided on an end of the connection component 110 away from the probe placement component 120; a second accommodating cavity 121 is provided inside the probe placement component 120, and the first accommodating cavity 1111 is connected to the second accommodating cavity 121;
[0035] The temperature sensor probe 200 is installed in the second accommodating cavity 121 and the second accommodating cavity 121 is filled with quartz sand 122;
[0036] One end of the aviation socket 400 is connected to one end of the connection assembly 110 away from the probe placement assembly 120 through the gasket 300, and the aviation socket 400 is provided with a fifth connection hole 410, a sixth connection hole 420, a seventh connection hole 430 and an eighth connection hole 440, the fifth connection hole 410 is aligned with the first connection hole 113, the sixth connection hole 420 is aligned with the second connection hole 114, the seventh connection hole 430 is aligned with the third connection hole 115, and the eighth connection hole 440 is aligned with the fourth connection hole 116;
[0037] The aviation plug 500 is connected to an end of the aviation socket 400 away from the connecting assembly 110 , and one end of the wire 600 is electrically connected to an end of the aviation plug 500 away from the aviation socket 400 .
[0038] Specifically, the sensor housing 100 further includes a sealing ring 130 , which is sleeved on the connecting assembly 110 and located on a side of the external thread structure 112 away from the probe placement assembly 120 (the sealing ring is used to improve stability when connected to a preset detection position).
[0039] More specifically, the aviation plug 500 is provided with a wire clamp 510 (the tightness of the wire clamp can be adjusted to meet the needs of wires of different sizes).
[0040] Furthermore, the gasket 300 is provided with a first through hole 310, a second through hole 320, a third through hole 330 and a fourth through hole 340, the first bolt 350 sequentially passes through the fifth connecting hole 410, the first through hole 310 and the first connecting hole 113, the second bolt 360 sequentially passes through the sixth connecting hole 420, the second through hole 320 and the second connecting hole 114, the third bolt 370 sequentially passes through the seventh connecting hole 430, the third through hole 330 and the third connecting hole 115, and the fourth bolt 380 sequentially passes through the eighth connecting hole 440, the fourth through hole 340 and the fourth connecting hole 116 (to improve structural strength).
[0041] Furthermore, the other end of the wire 600 is connected to a host computer (oil temperature controller).
[0042] For this utility model:
[0043] The temperature sensor probe is equipped with a circuit board and 6 probe leads. It adopts a 3-wire measurement method to eliminate lead resistance and has high measurement accuracy and stability.
[0044] Quartz sand is used as filler inside. Quartz sand has good thermal conductivity and hygroscopicity. The oil temperature can be quickly transferred to the temperature sensor probe through the shell and quartz sand, ensuring the accuracy and speed of oil temperature measurement.
[0045] The sensor housing is made of 304 stainless steel and will not rust even if it works in transformer oil for a long time. The housing size and length can be customized according to user needs to meet different usage scenarios.
[0046] An aviation socket and aviation plug are installed on the sensor housing, and a sealing ring and sealing gasket are provided to ensure that the oil temperature rod can be used outdoors. Here, an aviation socket and aviation plug are used for docking, which separates the oil temperature rod body from the wires and facilitates subsequent maintenance and installation.
[0047] The aviation plug is connected to the wire, which is a 6-core lead wire made of high and low temperature resistant silicone Teflon material. It is suitable for measuring the transformer oil temperature inside the box transformer in harsh outdoor environments such as wind power and photovoltaics. The temperature signal can be uploaded to the oil temperature controller through the lead wire for display, control and remote transmission.
[0048] The beneficial effects of the utility model are:
[0049] 1. The oil temperature rod shell is made of 304 stainless steel, which has good thermal conductivity, is not easy to rust, and can work stably at high oil temperature for a long time.
[0050] 2. Quartz sand is used as the thermal conductive material inside, which not only has good thermal conductivity but also has strong hygroscopicity, ensuring the accuracy and speed of oil temperature measurement.
[0051] 3. The temperature sensor probe has two sets of probes inside and uses a three-wire system to measure, which can eliminate lead resistance and the measurement accuracy is not affected by the wire length.
[0052] 4. The wires are made of high and low temperature resistant silicone Teflon shielded wire, which is suitable for measuring the transformer oil temperature inside the box transformer in harsh outdoor environments such as wind power and photovoltaics. Through the lead wires, we can upload the temperature signal to the oil temperature controller for display, control and remote transmission.
[0053] It is worth mentioning that the technical features such as transformers and host computers involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field, and should not be regarded as the invention point of this utility model patent. This utility model patent will not be further elaborated.
[0054] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A high-precision oil temperature rod for measuring the oil temperature inside a transformer, characterized in that: It includes sensor housing, temperature sensor probe, gasket, aviation socket, aviation plug and wire, including: The sensor housing comprises an integrally formed connection component and a probe placement component, wherein a first accommodating cavity is provided inside the connection component, an external thread structure is provided on a side of the connection component close to the probe placement component, and a first connection hole, a second connection hole, a third connection hole and a fourth connection hole are provided on an end of the connection component away from the probe placement component; a second accommodating cavity is provided inside the probe placement component, and the first accommodating cavity is communicated with the second accommodating cavity; The temperature sensor probe is installed in the second accommodating cavity and the second accommodating cavity is filled with quartz sand; One end of the aviation socket is connected to an end of the connection assembly away from the probe placement assembly through the gasket, and the aviation socket is provided with a fifth connection hole, a sixth connection hole, a seventh connection hole and an eighth connection hole, the fifth connection hole is aligned with the first connection hole, the sixth connection hole is aligned with the second connection hole, the seventh connection hole is aligned with the third connection hole, and the eighth connection hole is aligned with the fourth connection hole; The aviation plug is connected to an end of the aviation socket away from the connecting assembly, and one end of the wire is electrically connected to an end of the aviation plug away from the aviation socket.
2. A high-precision oil temperature rod according to claim 1, characterized in that: The sensor housing further comprises a sealing ring, which is sleeved on the connecting assembly and is located at a side of the external thread structure away from the probe placement assembly.
3. A high-precision oil temperature rod according to claim 2, characterized in that: The aviation plug is provided with a wire clamp.
4. A high-precision oil temperature rod according to claim 3, characterized in that: The gasket is provided with a first through hole, a second through hole, a third through hole and a fourth through hole, the first bolt passes through the fifth connecting hole, the first through hole and the first connecting hole in sequence, the second bolt passes through the sixth connecting hole, the second through hole and the second connecting hole in sequence, the third bolt passes through the seventh connecting hole, the third through hole and the third connecting hole in sequence, and the fourth bolt passes through the eighth connecting hole, the fourth through hole and the fourth connecting hole in sequence.
5. A high-precision oil temperature rod according to claim 4, characterized in that: The other end of the wire is connected to a host computer.