Intelligent full-automatic transformer oil sample needle cylinder sampling device

Abstract

The utility model provides an intelligent full-automatic transformer oil sample needle cylinder sampling device, which relates to the technical field of electrical equipment operation and maintenance, and comprises a case, an adapting and sampling unit and a control unit, the adapting and sampling unit comprises a component adapted to different oil taking ports, a valve and a needle cylinder sampling component, the control unit realizes sampling process control, parameter setting, state switching and data recording and displaying and supports wireless transmission, the whole sampling process is automatically controlled by a single chip microcomputer through the intelligent control unit according to preset programs and parameters, and the sampling efficiency is improved. Comprising switching of valves, movement of a needle cylinder piston and the like, manual operation is not needed, the sampling precision is improved, the electromagnetic force of an electromagnet is precisely controlled by an electromagnetic control unit, the needle cylinder piston is driven to move precisely, and compared with existing equipment which can only use a peristaltic pump for sampling, the error range of the sampling amount can be controlled within the extremely small range; and the sampling precision is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of power equipment operation and maintenance technology, and in particular to an intelligent fully automatic transformer oil sample syringe sampling device. Background Technology

[0002] When equipment such as transformers malfunctions, it is necessary to quickly collect oil samples for laboratory analysis to diagnose the type of fault (such as overheating or discharge) and develop a repair plan. However, existing equipment relies on manual operation, is susceptible to human error, and requires frequent venting and flushing. This invention is a fully automatic sampling device that eliminates the need for manual operation, avoids sampling errors, and can display sampling data in real time and record the ambient temperature and humidity for subsequent analysis.

[0003] According to the fully sealed sampling device and its test method for transformer insulating oil disclosed in Chinese patent literature (authorization announcement number: CN119469917A), oil sampling is performed by peristaltic pump, which has low sampling accuracy and cannot monitor sampling data and on-site environmental temperature and humidity data in real time.

[0004] While the aforementioned patents have solved the problem of not being able to perform fully automated sampling, they can only use peristaltic pumps for sampling, resulting in low sampling accuracy and the inability to record real-time sampling data and on-site temperature and humidity data.

[0005] Therefore, we propose an intelligent fully automatic transformer oil sample syringe sampling device. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies, which can only use peristaltic pumps for sampling, resulting in low sampling accuracy and the inability to record real-time sampling data and on-site temperature and humidity data.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] The intelligent fully automatic transformer oil sample syringe sampling device includes:

[0009] Chassis, adapter and sampling unit, and control unit;

[0010] The chassis is equipped with interactive components, connection components, and transmission components;

[0011] The adaptation and sampling unit includes components, valves, and syringe sampling components that adapt to different oil sampling ports;

[0012] The control unit enables sampling process control, parameter setting, status switching, and data recording and display, and supports wireless transmission.

[0013] As a preferred embodiment of this utility model, the interactive components of the chassis include a touch screen and multiple indicator lights. The indicator lights are used to indicate the operating status, fault status, and communication status, respectively. The parameters of the sampling process and the input of operation commands can be performed through the touch screen.

[0014] As a preferred embodiment of this utility model, the connecting components of the chassis include a USB interface and a power interface. The USB interface is used for data import and export, and can transmit the sampling record data to an external storage device, or import preset sampling parameters from an external device.

[0015] The power interface is used to connect to an external power source to provide power to the entire device.

[0016] As a preferred embodiment of this utility model, the transmission component of the chassis is a wireless transmission antenna, which is connected to the host computer software through the LORA wireless communication protocol to realize remote data transmission and monitoring. It can send sampling data and equipment status information to the host computer in real time, and can also receive control commands sent by the host computer.

[0017] As a preferred embodiment of this utility model, the adapter component of the adapter and sampling unit is a pagoda adapter, which is connected to the valve through a Teflon tube. The pagoda adapter can be used for various transformer oil inlets of different specifications, ensuring the universality and compatibility of the device.

[0018] As a preferred embodiment of this utility model, the valve of the adapter and sampling unit is an electromagnetic three-way valve, which is provided with three pipe interfaces, which are respectively connected to the pagoda adapter, the waste liquid tank and the syringe sampling component through Teflon tubes. The switching of different channels is realized through electromagnetic control, thereby completing different operations such as sampling, cleaning and emptying.

[0019] As a preferred embodiment of this utility model, the syringe sampling component of the adapter and sampling unit includes a syringe body, a threaded fixing bracket, a slide rail bracket, a neodymium magnet, and an electromagnet. The syringe body is fixed on the threaded fixing bracket, the piston is fixed on the slide rail bracket, the neodymium magnet is fixed on the slide rail bracket, and the electromagnet is mounted on the chassis. By controlling the magnitude and direction of the electromagnet's magnetic force, the movement of the syringe body piston is precisely controlled to achieve quantitative sampling.

[0020] As a preferred embodiment of this utility model, the intelligent control unit of the control unit is composed of a single-chip microcomputer, which automatically controls the entire sampling process according to the preset program and parameters, including the switching of valves and the movement of the syringe piston, to ensure the accuracy and stability of the sampling process.

[0021] As a preferred embodiment of this utility model, the electromagnetic control unit of the control unit drives the piston of the syringe body to move precisely by precisely controlling the electromagnetic force of the electromagnet, thereby achieving precise control of the sampling amount and keeping the error range within a very small range.

[0022] As a preferred embodiment of this utility model, the three-way valve switching unit of the control unit automatically switches the channel of the electromagnetic three-way valve according to the needs of the sampling process, realizing the conversion between different states of sampling, cleaning, and venting, thereby improving work efficiency and automation.

[0023] The data recording and display unit of the control unit records and displays sampling time, location, and oil temperature parameters via an external USB connector and a touch screen. It also supports wireless transmission, which can send the data to the host computer software in real time for further analysis and processing.

[0024] As a preferred embodiment of this utility model, it also includes a temperature and humidity sensor installed inside the chassis. The temperature and humidity sensor monitors the temperature and humidity information of the sampling environment in real time and transmits the data to the control unit. The control unit can adjust the sampling parameters according to the environmental information to ensure the accuracy and reliability of the sampling.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] In this invention, the entire sampling process, including valve switching and syringe piston movement, is automatically controlled by a microcontroller based on preset programs and parameters through an intelligent control unit, without the need for manual operation.

[0027] To improve sampling accuracy, an electromagnetic control unit is used to precisely control the electromagnetic force of the electromagnet, driving the syringe piston to move precisely. Compared with existing equipment that can only use peristaltic pumps for sampling, this method can control the error range of the sampling amount to a very small range, greatly improving sampling accuracy.

[0028] Equipped with data recording and transmission functions, the control unit's data recording and display unit records and displays parameters such as sampling time, location, and oil temperature via an external USB connector and touch screen. It also supports wireless transmission, which can send data to the host computer software in real time for further analysis and processing, solving the problem that existing equipment cannot record real-time sampling data.

[0029] It can monitor ambient temperature and humidity and adjust parameters. The temperature and humidity sensor installed in the chassis monitors the temperature and humidity information of the sampling environment in real time and transmits the data to the control unit. The control unit can adjust the sampling parameters according to the environmental information to ensure the accuracy and reliability of sampling in different environments, making up for the shortcomings of existing equipment that cannot record on-site temperature and humidity data.

[0030] With strong versatility and compatibility, the adapter and sampling unit use a pagoda adapter, which is connected to the valve through a Teflon tube. It can be used for various transformer oil inlets of different specifications, which greatly improves the versatility and compatibility of the device compared with existing equipment.

[0031] It is easy to operate and highly automated. The chassis is equipped with a touch screen and multiple indicator lights. The touch screen allows for interactive operations such as setting sampling process parameters and inputting operation commands. The indicator lights can intuitively display the operating status, fault status, and communication status. At the same time, the three-way valve switching unit of the control unit automatically switches the channel of the solenoid three-way valve according to the sampling process, realizing the conversion between different states such as sampling, cleaning, and venting, which improves work efficiency and automation and facilitates user operation. Attached Figure Description

[0032] Figure 1 A schematic diagram of the main structure of the intelligent fully automatic transformer oil sample syringe sampling device provided by this utility model;

[0033] Figure 2 A second-view schematic diagram of the main body of the intelligent fully automatic transformer oil sample syringe sampling device provided by this utility model;

[0034] Figure 3 A schematic diagram of the syringe body connection for the intelligent fully automatic transformer oil sample syringe sampling device provided by this utility model;

[0035] Figure 4 A schematic diagram of the microcontroller installation for the intelligent fully automatic transformer oil sample syringe sampling device provided by this utility model;

[0036] Figure 5 A schematic diagram of the electromagnet in the intelligent fully automatic transformer oil sample syringe sampling device provided by this utility model.

[0037] Legend: 1. Chassis; 2. Touch screen; 3. Indicator light; 4. USB interface; 5. Power interface; 6. Wireless transmission antenna; 7. Transmission tower adapter; 8. Solenoid three-way valve; 9. Pipe interface; 10. Syringe body; 11. Threaded fixing bracket; 12. Slide rail bracket; 13. Neodymium magnet; 14. Electromagnet; 15. Microcontroller; 16. Temperature and humidity sensor; 17. Waste liquid tank. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0039] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] Example

[0043] like Figure 1-5 As shown, this utility model provides a technical solution: the intelligent fully automatic transformer oil sample syringe body 10 sampling device is composed of a chassis 1, an adapter and sampling unit and a control unit. The chassis 1 serves as the carrier of the entire device, providing protection and an installation platform for the internal components; the adapter and sampling unit is responsible for connecting to the transformer oil port and completing the oil sample collection; the control unit controls the orderly operation of the entire sampling process.

[0044] The three units work together: the chassis 1 ensures the stable operation of the internal components, the adapter and sampling unit enables docking with the transformer and oil sample acquisition, and the control unit issues instructions according to the preset program to achieve precise control of the entire device.

[0045] In the interactive components of chassis 1, touch screen 2 adopts capacitive touch technology, which has sensitive touch response. Its screen display interface is carefully designed and divided into multiple functional areas, such as parameter setting area, operation command area, data display area, etc. Multiple indicator lights 3 use high-brightness LEDs, which clearly distinguish the operating status, fault status and communication status through different colors and flashing frequencies. For example, green solid indicates normal operation, red flashing indicates a fault, and blue flashing indicates communication in progress.

[0046] The capacitive touchscreen 2 utilizes the principle of human body electric field induction. When a finger touches the touchscreen 2, it changes the capacitance value of the screen surface, thereby allowing the touchscreen 2 controller to recognize the touch position and realize parameter setting and operation command input. The indicator light 3 is based on a simple circuit control principle. According to the electrical signal sent by the control unit, it drives the LED light to emit light, conveying the device status to the user with an intuitive visual signal.

[0047] USB interface 4 adopts the universal USB 3.0 standard, which has high-speed data transmission capability. It supports the connection of various storage devices, including common USB flash drives and external hard drives. Power interface 5 adopts the standard DC power interface, which has good versatility and stability and can be adapted to a variety of common external power adapters to ensure a stable power supply for the device.

[0048] The USB 3.0 interface uses the Universal Serial Bus protocol to transmit data via differential signals, enabling high-speed and stable data transmission and meeting the needs of data import and export. The DC power interface 5 uses a specific voltage conversion circuit to convert the AC power output from the external power adapter into the DC power required by the device, providing stable power to the various components inside the device.

[0049] The wireless transmission antenna 6 adopts a high-performance directional antenna with strong signal gain and anti-interference capability. The LORA wireless communication protocol is a low-power long-range wireless communication technology based on spread spectrum technology. Its operating frequency band is the unlicensed frequency band such as 433MHz or 868MHz. A secure and reliable communication link is established between the device and the host computer software. The transmitted data is encrypted through encryption algorithms to prevent data from being stolen or tampered with.

[0050] Directional antennas can focus the direction of signal transmission and reception, enhance signal strength, and reduce interference. LoRa spread spectrum technology reduces interference during signal transmission by expanding the spectrum of the original signal, enabling long-distance, low-power data transmission. Encryption algorithms use specific keys to encrypt and decrypt data, ensuring data security and integrity.

[0051] The Baota Adapter 7 is made of high-strength, corrosion-resistant engineering plastics. Its internal structure has been optimized and features a unique sealing structure and variable diameter design. The sealing structure uses rubber sealing rings to effectively prevent oil leakage. The variable diameter design can adapt to transformer oil inlets of different inner diameters through elastic expansion or adjustable mechanical structures.

[0052] Engineering plastics ensure the durability and chemical stability of the Pagoda Adapter 7. The rubber sealing ring utilizes its elasticity to fill gaps when the adapter is connected to the oil inlet, preventing oil leakage. The variable diameter design is based on mechanical or elastic principles, adaptively adjusting according to the size of the oil inlet to ensure a tight connection and improve the versatility and compatibility of the device.

[0053] The electromagnetic three-way valve 8 uses a high-precision electromagnetic drive valve core. The movement of the valve core is precisely controlled by the control unit. All three pipe interfaces 9 adopt standard sealing connection methods, such as threaded seals or quick-connect seals, to ensure tight connection and prevent oil leakage. Under different energized states, the valve core of the electromagnetic three-way valve 8 will produce different displacements, thereby realizing the switching of channels.

[0054] The electromagnetically driven valve core utilizes the principle of electromagnetic induction. When current passes through the electromagnetic coil, a magnetic field is generated, which attracts or repels the valve core, causing it to shift. By controlling the magnitude and direction of the current, the position of the valve core can be precisely controlled, enabling the switching of different channels and thus completing operations such as sampling, cleaning, and venting.

[0055] The syringe body 10 is made of highly transparent, oil-resistant glass or high-strength medical-grade plastic, which facilitates observation of the oil sample state. The threaded fixing bracket 11 ensures that the syringe body 10 is firmly installed and not easily shaken through a precise threaded connection. The slide rail bracket 12 is made of high-precision aluminum alloy with a smooth surface treatment to reduce friction during piston movement. The neodymium magnet 13 is made of high-performance rare-earth permanent magnet material with strong magnetism. The electromagnet 14 is an electromagnetic coil with an iron core, and the magnetic force is adjusted by controlling the magnitude and direction of the current.

[0056] The highly transparent material facilitates observation of the oil sample, ensuring timely detection of abnormalities during sampling. The threaded connection utilizes the tightening effect of the threads to ensure stable installation of the syringe body 10. The smooth surface and good mechanical properties of the aluminum alloy slide rail bracket 12 facilitate smooth piston movement. The interaction between the neodymium magnet 13 and the electromagnet 14 is based on electromagnetic principles. By controlling the current of the electromagnet 14, the magnitude and direction of its magnetic force are changed, thereby precisely controlling the movement of the piston of the syringe body 10 to achieve quantitative sampling.

[0057] The microcontroller 15 uses a high-performance, low-power microcontroller, such as the STM32 series microcontroller 15, which integrates rich peripheral resources, such as timers, interrupt controllers, serial communication modules, etc. The preset program is stored in the internal flash memory of the microcontroller 15. Various parameters, such as sampling time interval, sampling amount, cleaning time, etc., are set by programming. According to these preset parameters, the microcontroller 15 sends control signals to other units through the control port in a certain logical order.

[0058] With its powerful processing capabilities and abundant peripheral resources, the STM32 series microcontroller 15 can meet complex control requirements. The timer is used to precisely control the time interval, the interrupt controller is used to handle various emergencies, the serial communication module is used to transmit data with other units, and the preset program is a series of instruction sets written based on the analysis and design of the sampling process, enabling the microcontroller 15 to control the entire sampling process in an orderly manner.

[0059] The electromagnetic control unit uses a high-precision current control chip, such as the TI DRV8833 chip. This chip can precisely control the magnitude and direction of the current of the electromagnet 14, thereby achieving precise adjustment of the electromagnetic force of the electromagnet 14. In cooperation with the microcontroller 15, it receives the PWM (pulse width modulation) signal sent by the microcontroller 15, and after the internal circuit conversion of the chip, outputs a stable current to drive the electromagnet 14.

[0060] The DRV8833 chip processes the PWM signal and uses the pulse width modulation principle to change the average value of the output current, thereby precisely controlling the electromagnetic force of the electromagnet 14. This precise current control method can achieve precise control of the piston movement of the syringe body 10, keeping the sampling error range within a very small range.

[0061] The three-way valve switching unit operates based on the logic control of the microcontroller 15 and the characteristics of the electromagnetic three-way valve 8. It monitors each stage of the sampling process, such as before sampling, during sampling, and post-sampling cleaning, and sends corresponding control signals to the electromagnetic three-way valve 8 according to preset logic rules. For example, before sampling, the electromagnetic three-way valve 8 is switched to the channel connecting the pagoda adapter 7 and the syringe body 10; after sampling, it is switched to the channel connecting the waste liquid tank 17 and the syringe body 10 for cleaning.

[0062] According to the preset sampling process logic, the microcontroller 15 determines the current stage and then sends an electrical signal to the solenoid three-way valve 8 through the control port to drive the valve core of the solenoid three-way valve 8 to move, thereby realizing automatic channel switching and improving work efficiency and automation.

[0063] In the data recording and display unit, the touch screen adopts a TFT-LCD liquid crystal display, which has the characteristics of high resolution and vivid colors. It transmits data with the microcontroller 15 through communication protocols such as SPI (Serial Peripheral Interface) or I2C (Integrated Circuit Bus). The data is stored in the internal Flash memory or the external SD card for long-term preservation. The wireless transmission function is achieved by using the LoRa module to package and send the data to the host computer software according to a specific communication protocol.

[0064] TFT-LCD liquid crystal displays utilize the photoelectric effect of liquid crystals to display images and text by controlling the arrangement of liquid crystal molecules. SPI or I2C communication protocols provide a stable and efficient channel for data transmission. Flash memory or SD cards are used for data storage. Based on flash memory technology, they can achieve fast data reading and writing. The LORA module modulates and encodes data according to the LORA wireless communication protocol before sending it out, realizing remote data transmission and monitoring.

[0065] The temperature and humidity sensor 16 is a digital temperature and humidity sensor, such as the DHT11 sensor. It converts the temperature and humidity in the environment into digital signals through its internal temperature and humidity sensing element. The sensor communicates with the microcontroller 15 through a single bus, transmitting the collected temperature and humidity data to the microcontroller 15 in real time. After receiving the data, the microcontroller 15 adjusts the sampling parameters according to the preset algorithm, such as appropriately reducing the sampling speed in high-temperature environments to avoid changes in the properties of the oil sample due to excessive temperature.

[0066] The DHT11 sensor's temperature and humidity sensing element is highly sensitive to changes in ambient temperature and humidity. It can convert temperature and humidity signals into digital quantities. The single-bus communication protocol simplifies the connection between the sensor and the microcontroller 15, requiring only one data line for data transmission. The microcontroller 15 optimizes and adjusts the sampling parameters based on a preset algorithm and the temperature and humidity data to ensure the accuracy and reliability of the sampling.

[0067] Work process summary

[0068] Preparation stage

[0069] The operator connects the device to a stable external power source via power interface 5, presses the power switch, and the device starts up. During the startup process, the microcontroller 15 performs self-tests on each unit to check whether the hardware is working properly. At the same time, the touch screen displays the startup interface, prompting the user to wait for the system initialization to complete.

[0070] After initialization, the operator can access the parameter setting interface via the touch screen 2. In this interface, the user can set parameters such as sampling volume, sampling time interval, sampling mode (timed sampling, quantitative sampling, continuous sampling, etc.), cleaning time, and emptying time according to actual needs. After setting, the user clicks the "Save" button, and the microcontroller 15 stores these parameters in the internal Flash memory.

[0071] The device searches for signals from the host computer software via wireless transmission antenna 6 and attempts to establish a connection. If the connection is successful, the touch screen will display a connection success message, and the host computer software will also display the device's connected status. At this time, the device can synchronize data and be remotely controlled with the host computer software.

[0072] Sampling stage

[0073] The intelligent control unit initiates the sampling process according to the preset time interval or the received instructions from the host computer. First, the electromagnetic control unit controls the electromagnet 14 to generate a small initial magnetic force to attract the neodymium magnet 13, causing the piston of the syringe body 10 to slowly move backward a short distance to expel any air that may be present in the syringe body 10.

[0074] Then, the three-way valve switching unit controls the electromagnetic three-way valve 8 to switch to the channel connecting the pagoda adapter 7 and the syringe body 10. The electromagnetic control unit gradually increases the magnetic force of the electromagnet 14, causing the piston of the syringe body 10 to move backward quickly and draw oil samples from the transformer oil port through the pagoda adapter 7. During the oil sample drawing process, the data recording and display unit records the sampling time and sampling amount in real time and displays these data on the touch screen.

[0075] When the oil sample in the syringe body 10 reaches the preset sampling amount, the electromagnetic control unit controls the electromagnet 14 to reduce the magnetic force, so that the piston of the syringe body 10 stops moving. At the same time, the three-way valve switching unit controls the electromagnetic three-way valve 8 to close the channel connecting the pagoda adapter 7 and the syringe body 10, thus completing the sampling operation.

[0076] Cleaning stage

[0077] After sampling is completed, the three-way valve switching unit controls the electromagnetic three-way valve 8 to switch to the channel connecting the waste liquid tank 17 and the syringe body 10. The electromagnetic control unit controls the electromagnet 14 to push the piston of the syringe body 10 forward, so as to discharge the oil sample in the syringe body 10 into the waste liquid tank 17.

[0078] Then, the device draws an appropriate amount of cleaning fluid (such as alcohol or special cleaning fluid) through the pagoda adapter 7 to clean the inside of the syringe body 10. During the cleaning process, the electromagnetic control unit controls the piston of the syringe body 10 to move repeatedly so that the cleaning fluid can fully rinse the inner wall of the syringe body 10. After the cleaning is completed, the waste liquid after cleaning is discharged into the waste liquid tank 17.

[0079] To ensure that the cleaning fluid in the syringe body 10 is completely emptied, the electromagnetic control unit controls the piston of the syringe body 10 to move forward again to discharge the residual liquid in the syringe body 10. At the same time, the three-way valve switching unit controls the electromagnetic three-way valve 8 to close the channel connecting the waste liquid tank 17 and the syringe body 10.

[0080] Data recording and transmission stage

[0081] During the sampling and cleaning process, the data recording and display unit continuously records parameters such as sampling time, location, oil temperature, sampling volume, and cleaning time, and stores this data on an SD card. The touch screen displays the changes in these parameters in real time, making it convenient for operators to check at any time.

[0082] The data recording and display unit packages the data stored on the SD card according to a preset data transmission protocol (such as JSON format) through the LoRa module, and then sends it to the host computer software through the wireless transmission antenna 6. After receiving the data, the host computer software parses and processes the data and stores it in the database for subsequent analysis and management.

[0083] Environmental monitoring and parameter adjustment phase

[0084] The temperature and humidity sensor 16 monitors the temperature and humidity information of the sampling environment in real time and transmits the data to the microcontroller 15 via the I2C interface. The microcontroller 15 compares the received temperature and humidity data with the preset temperature and humidity range.

[0085] If the ambient temperature is too high or too low, the microcontroller 15 will adjust the sampling speed appropriately according to the preset algorithm. For example, in a high-temperature environment, the sampling speed will be reduced to prevent the oil sample from evaporating or deteriorating due to excessive temperature; in a low-temperature environment, the sampling speed will be appropriately increased to reduce the residence time of the oil sample in the pipeline.

[0086] If the ambient humidity exceeds the preset range, the microcontroller 15 will increase the number of cleaning cycles or extend the cleaning time to ensure the cleanliness of the syringe body 10 and the inside of the tubing, and reduce the impact of humidity on the oil sample.

[0087] The entire workflow is carried out cyclically under the precise control of the control unit, realizing fully automatic and high-precision acquisition and data management of transformer oil samples. At the same time, the device has fault diagnosis and alarm functions. When abnormal situations occur (such as failure of electromagnetic three-way valve 8, abnormal piston movement of syringe body 10, wireless communication interruption, etc.), the touch screen will display the corresponding fault information, and the indicator light 3 will flash alarm to remind the operator to deal with it in time.

[0088] 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. An intelligent fully automatic transformer oil sample syringe sampling device, characterized in that, include: Chassis (1), adapter and sampling unit and control unit; The chassis (1) is equipped with an interactive component, a connecting component, and a transmission component; The adaptation and sampling unit includes components, valves, and syringe sampling components that adapt to different oil sampling ports; The control unit enables sampling process control, parameter setting, status switching, and data recording and display, and supports wireless transmission.

2. The intelligent fully automatic transformer oil sample syringe sampling device according to claim 1, characterized in that, The interactive components of the chassis (1) include a touch screen (2) and multiple indicator lights (3). The indicator lights (3) are used to indicate the running status, fault status and communication status respectively. The parameters of the sampling process and the input of operation instructions can be performed through the touch screen (2).

3. The intelligent fully automatic transformer oil sample syringe sampling device according to claim 2, characterized in that, The connecting components of the chassis (1) include a USB interface (4) and a power interface (5). The USB interface (4) is used for data import and export. It can transmit the sampling record data to an external storage device and import preset sampling parameters from an external device. The power interface (5) is used to connect to an external power source to provide power support for the entire device.

4. The intelligent fully automatic transformer oil sample syringe sampling device according to claim 3, characterized in that, The transmission component of the chassis (1) is a wireless transmission antenna (6), which is connected to the host computer software through the LORA wireless communication protocol to realize remote data transmission and monitoring. It can send sampling data and equipment status information to the host computer in real time, and can also receive control commands sent by the host computer.

5. The intelligent fully automatic transformer oil sample syringe sampling device according to claim 4, characterized in that, The adapter component of the adapter and sampling unit is a pagoda adapter (7), which is connected to the valve through a Teflon tube. The pagoda adapter (7) can be used for various transformer oil inlets of different specifications, ensuring the universality and compatibility of the device.

6. The intelligent fully automatic transformer oil sample syringe sampling device according to claim 5, characterized in that, The valve of the adapter and sampling unit is an electromagnetic three-way valve (8), which has three pipe interfaces (9) that are connected to the pagoda adapter (7), waste liquid tank (17) and syringe sampling component through Teflon tubes respectively. The switching of different channels is achieved through electromagnetic control, thereby completing different operations such as sampling, cleaning and emptying.

7. The intelligent fully automatic transformer oil sample syringe sampling device according to claim 6, characterized in that, The syringe sampling component of the adapter and sampling unit includes a syringe body (10), a threaded fixing bracket (11), a slide rail bracket (12), a neodymium magnet (13), and an electromagnet (14). The syringe body (10) is fixed on the threaded fixing bracket (11), the piston is fixed on the slide rail bracket (12), the neodymium magnet (13) is fixed on the slide rail bracket (12), and the electromagnet (14) is installed on the chassis (1). By controlling the magnitude and direction of the magnetic force of the electromagnet (14), the movement of the piston of the syringe body (10) is precisely controlled to achieve quantitative sampling.

8. The intelligent fully automatic transformer oil sample syringe sampling device according to claim 7, characterized in that, The intelligent control unit of the control unit is composed of a single-chip microcomputer (15). According to the preset program and parameters, it automatically controls the entire sampling process, including the switching of valves and the movement of the piston of the syringe body (10), to ensure the accuracy and stability of the sampling process. The electromagnetic control unit of the control unit drives the piston of the syringe body (10) to move precisely by precisely controlling the electromagnetic force of the electromagnet (14), thereby achieving precise control of the sampling amount and keeping the error range within a very small range.

9. The intelligent fully automatic transformer oil sample syringe sampling device according to claim 8, characterized in that, The three-way valve switching unit of the control unit automatically switches the channel of the electromagnetic three-way valve (8) according to the needs of the sampling process, so as to realize the conversion of different states of sampling, cleaning and emptying, and improve work efficiency and automation. The data recording and display unit of the control unit records and displays sampling time, location, and oil temperature parameters via an external USB connector and a touch screen. It also supports wireless transmission, which can send the data to the host computer software in real time for further analysis and processing.

10. The intelligent fully automatic transformer oil sample syringe sampling device according to claim 9, characterized in that, It also includes a temperature and humidity sensor (16) installed in the chassis (1). The temperature and humidity sensor (16) monitors the temperature and humidity information of the sampling environment in real time and transmits the data to the control unit. The control unit can adjust the sampling parameters according to the environmental information to ensure the accuracy and reliability of the sampling.

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