Transformer oil sample sealing and collecting device

Abstract

The invention discloses a transformer oil sample sealing and collecting device, and belongs to the technical field of transformer overhaul. The transformer oil sample sealing and collecting device comprises a hollow shell, and an oil sample draw-off pump, a pipeline cleaning pump and a waste oil discharge pump which are arranged in the hollow shell; the four-way electromagnetic valve and the three-way electromagnetic valve are used for switching pipeline channels, and the controller is used for controlling the operation of the transformer oil sample sealed collection device. The oil sample extraction pump, the pipeline cleaning pump and the waste oil discharge pump are integrated and matched with the four-way electromagnetic valve and the three-way electromagnetic valve, so that the multifunctional integrated operation of sampling, cleaning and waste oil discharge is realized, and the comprehensive performance and practicability of the equipment are remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformer maintenance, and particularly relates to a sealed oil sample collection device for transformers. Background Art

[0002] During the operation of power equipment, oil sample analysis is an important means to monitor equipment wear and faults. Through detecting wear particles, pollutants, and chemical changes in the oil, oil sample analysis technology can effectively evaluate the operating status of equipment and give early warnings of potential faults. Since the last century, oil sample analysis technology has been widely applied to the monitoring of the operating status and fault diagnosis of power equipment, becoming one of the core means of equipment maintenance and fault diagnosis.

[0003] However, in practical applications, many high-voltage power equipment (such as transformers, circuit breakers, etc.) are often installed at high altitudes or in inaccessible locations, making it extremely difficult and risky for workers to collect oil samples. Traditional oil sample collection methods usually rely on manual operation, which is not only inefficient but also has high operation risks in high-voltage and high-altitude environments. In addition, existing oil sample collection devices have single functions and usually only support sampling operations, unable to meet multiple requirements such as cleaning and waste oil discharge at the same time, resulting in poor device scalability and difficulty in adapting to complex on-site environments.

[0004] The vacuum pump control systems in the prior art usually only support single functions, such as only for sampling or only for cleaning, and cannot achieve multi-functional integration. In addition, the control of the vacuum pump mostly relies on manual switching, which is complex and error-prone to operate, and difficult to meet the requirements of efficient and accurate oil sample collection. These problems seriously limit the application effect of oil sample analysis technology in the monitoring of power equipment status.

[0005] Therefore, there is an urgent need for a sealed oil sample collection device for transformers that can solve the difficulties of high-altitude oil sample collection, integrate multiple functions such as sampling, cleaning, and waste oil discharge, and achieve automatic control to improve operation efficiency and safety. Summary of the Invention

[0006] In order to overcome the problems in the background art, the present invention provides a sealed oil sample collection device for transformers.

[0007] To achieve the above object, the present invention is realized by the following technical solutions: A sealed oil sample collection device for transformers, comprising: a hollow housing, an oil sample extraction pump, a pipeline cleaning pump, and a waste oil discharge pump provided in the hollow housing; The inlet end Ⅰ of the oil sample extraction pump is connected to an oil inlet pipe, and the other end of the oil inlet pipe is provided with a sampling valve joint; The outlet end Ⅰ of the oil sample extraction pump is connected to the interface Ⅰ of a four-way solenoid valve; The interface Ⅱ of the four-way solenoid valve is connected to the inlet end Ⅱ of the pipeline cleaning pump; The transformer oil sample sealed collection device further includes: an oil sample container connected to the interface Ⅲ of the four-way solenoid valve; The interface Ⅳ of the four-way solenoid valve is connected to the interface Ⅴ of the three-way solenoid valve; The outlet end Ⅱ of the pipeline cleaning pump is connected to the interface Ⅵ of the three-way solenoid valve; The interface Ⅶ of the three-way solenoid valve is connected to the inlet end Ⅲ of the waste oil discharge pump; The outlet end Ⅲ of the waste oil discharge pump is connected to the drain pipe; The transformer oil sample sealed collection device further includes: a controller electrically connected to the oil sample extraction pump, the pipeline cleaning pump, the waste oil discharge pump, the four-way solenoid valve, and the three-way solenoid valve.

[0008] Preferably, the controller includes: a PCL module, a power supply module electrically connected to the PCL module, a relay module electrically connected to the PCL module, a motor drive module electrically connected to the PCL module, and a control display panel embedded on the surface of the hollow housing and electrically connected to the PCL module.

[0009] Preferably, the power supply module is provided with an ADC module and a MOSFET module electrically connected to the PCL module.

[0010] Preferably, a flow hydraulic sensor is provided between the outlet end Ⅰ and the interface Ⅰ, and the flow hydraulic sensor is electrically connected to the PCL module.

[0011] Preferably, the oil sample container is a syringe, and the syringe interface is connected to the interface Ⅲ.

[0012] Preferably, the inlet pipe is provided with a cavity for oil to flow through, an ultrasonic transducer is provided inside the hollow housing, the piezoelectric material of the ultrasonic transducer is arranged in the cavity, and the ultrasonic transducer is electrically connected to the PCL module.

[0013] Preferably, the hollow housing includes: a first compartment integrally installing the oil sample extraction pump, the pipeline cleaning pump, the waste oil discharge pump, the four-way solenoid valve, the three-way solenoid valve, the controller, the flow hydraulic sensor, and the ultrasonic transducer, a second compartment for placing the bracket of the oil sample container, and a tool bin.

[0014] Preferably, the bracket is a detachable hoop, the first compartment is provided with a transparent door installed through a damping hinge, and the second compartment is provided with a snap-on door installed through an alloy hinge.

[0015] The beneficial effects of the present invention compared with the prior art: 1. The present invention integrates an oil sample extraction pump, a pipeline cleaning pump, and a waste oil discharge pump, and cooperates with a four-way solenoid valve and a three-way solenoid valve to achieve multi-functional integrated operations of sampling, cleaning, and waste oil discharge, significantly improving the comprehensive performance and practicability of the equipment.

[0016] 2. The PLC module and the relay module are used to achieve automatic control. The mode switching and status monitoring are carried out through the control display panel, reducing manual intervention, improving the operation efficiency and accuracy, and at the same time reducing the risk of misoperation.

[0017] 3. The combination of the pipeline cleaning pump and the ultrasonic transducer can efficiently clean the pipeline and the sampling valve, prevent cross-contamination of oil samples, and ensure the accuracy and reliability of the sampling results.

[0018] 4. The flow hydraulic sensor and the ADC module can real-time monitor the flow and pressure during the oil sample collection process, and feedback the data through the control display panel, facilitating the operator to adjust the parameters in time to ensure the safety and stability of the sampling process.

[0019] 5. Through the MOSFET module and the low-power design, the device can automatically enter the low-power mode in the non-working state, extending the battery life, which is suitable for long-term field operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the module connection of the sealed oil sample collection device for transformer oil; Figure 2 It is a schematic diagram of the pipeline connection of the sealed oil sample collection device for transformer oil; Figure 3 It is a schematic diagram of the structure of the hollow housing.

[0021] In the figure: hollow housing 1, oil sample extraction pump 2, pipeline cleaning pump 3, waste oil discharge pump 4, inlet pipe 5, sampling valve joint 6, inlet end I 7, outlet end I 8, four-way solenoid valve 9, interface I 10, interface II 11, inlet end II 12, interface III 13, oil sample container 14, interface IV 15, three-way solenoid valve 16, interface V 17, outlet end II 18, interface VI 19, interface VII 20, inlet end III 21, outlet end III 22, drain pipe 23, PCL module 24, power supply module 25, relay module 26, motor drive module 27, control display panel 28, flow hydraulic sensor 29, cavity 30, ultrasonic transducer 31, first compartment 32, second compartment 33, tool bin 34, hoop 35, damping hinge 36, transparent door 37, alloy hinge 38, snap-on door 39, handle 40. DETAILED DESCRIPTION OF THE INVENTION

[0022] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below to facilitate understanding by those skilled in the art.

[0023] Please refer to Figures 1 to 3 , the present invention provides a transformer oil sample sealing collection device, including: a hollow housing 1, an oil sample extraction pump 2, a pipeline cleaning pump 3, and a waste oil discharge pump 4 disposed within the hollow housing 1; The inlet end Ⅰ7 of the oil sample extraction pump 2 is connected to an oil inlet pipe 5, and the other end of the oil inlet pipe 5 is provided with a sampling valve joint 6; The outlet end Ⅰ8 of the oil sample extraction pump 2 is connected to the interface Ⅰ10 of a four-way solenoid valve 9; The interface Ⅱ11 of the four-way solenoid valve 9 is connected to the inlet end Ⅱ12 of the pipeline cleaning pump 3; The transformer oil sample sealing collection device further includes: an oil sample container 14 connected to the interface Ⅲ13 of the four-way solenoid valve 9; The interface Ⅳ15 of the four-way solenoid valve 9 is connected to the interface Ⅴ17 of a three-way solenoid valve 16; The outlet end Ⅱ18 of the pipeline cleaning pump 3 is connected to the interface Ⅵ19 of the three-way solenoid valve 16; The interface Ⅶ20 of the three-way solenoid valve 16 is connected to the inlet end Ⅲ21 of the waste oil discharge pump 4; The outlet end Ⅲ22 of the waste oil discharge pump 4 is connected to an oil discharge pipe 23; The transformer oil sample sealing collection device further includes: a controller electrically connected to the oil sample extraction pump 2, the pipeline cleaning pump 3, the waste oil discharge pump 4, the four-way solenoid valve 9, and the three-way solenoid valve 16.

[0024] The oil inlet pipe 5 is docked with the sampling valve: For the waste oil discharge operation, the controller starts the waste oil discharge pump 4 and opens the following pipeline channels: the precipitated oil that has not participated in the transformer circulation enters the oil inlet pipe 5 through the sampling valve - inlet end Ⅰ7 - oil sample extraction pump 2 - outlet end Ⅰ8 - interface Ⅰ10 - four-way solenoid valve 9 - interface Ⅳ15 - interface Ⅴ17 - three-way solenoid valve 16 - interface Ⅶ20 - inlet end Ⅲ21 - waste oil discharge pump 4 - outlet end Ⅲ22 - oil discharge pipe 23.

[0025] After the extraction of the precipitated oil that has not participated in the transformer circulation is completed, the pipeline needs to be flushed with circulating oil to avoid sampling errors. The controller starts the pipeline cleaning pump 3 and opens the following pipeline channels: circulating flushing oil - oil inlet pipe 5 - inlet end Ⅰ7 - oil sample extraction pump 2 - outlet end Ⅰ8 - interface Ⅰ10 - four-way solenoid valve 9 - inlet end Ⅱ12 - pipeline cleaning pump 3 - outlet end Ⅱ18 - interface Ⅵ19 - three-way solenoid valve 16 - interface Ⅶ20 - inlet end Ⅲ21 - waste oil discharge pump 4 - outlet end Ⅲ22 - oil discharge pipe 23.

[0026] After flushing and ensuring there is no residual waste oil in the pipeline, the sample oil can be extracted. The controller starts the oil sample extraction pump 2 and opens the following pipeline: sample oil - inlet pipe 5 - inlet end I 7 - oil sample extraction pump 2 - outlet end I 8 - interface I 10 - four-way solenoid valve 9 - interface III 13 - oil sample container 14.

[0027] The controller includes: a PCL module 24, a power module 25 electrically connected to the PCL module 24, a relay module 26 electrically connected to the PCL module 24, a motor drive module 27 electrically connected to the PCL module 24, and a control display panel 28 embedded on the surface of the hollow housing 1 and electrically connected to the PCL module 24.

[0028] In this embodiment, the PCL module 24 is selected as Siemens S7-1200, the power module 25 is selected as a 24VDC power supply and is configured with a voltage conversion module. The relay module 26 is used to control the on / off of the pump, three-way solenoid valve 16, and four-way solenoid valve 9. The motor drive module 27 is selected as L298N and is used to adjust the motor speeds of the oil sample extraction pump 2, pipeline cleaning pump 3, and waste oil discharge pump 4 to adjust the operating state. The control display panel 28 is selected as a 4.3-inch touch screen and is used to input commands, adjust parameters, and view the operating state.

[0029] The power module 25 is provided with an ADC module and a MOSFET module that are electrically connected to the PCL module 24. The ADC module calculates the remaining power according to the corresponding relationship between voltage and power and displays the power on the control display panel 28. When the power is too low, the PCL module 24 will alarm through a red light-emitting diode. The MOSFET module switch cuts off the power supply in the standby mode and cuts off the power supply of irrelevant modules in the operating mode to achieve the purpose of reducing power consumption and extending the battery life.

[0030] A flow and hydraulic pressure sensor 29 is provided between the outlet end I 8 and the interface I 10, and the flow and hydraulic pressure sensor 29 is electrically connected to the PCL module 24. The flow and hydraulic pressure sensor 29 is selected as IFM SM9000. This flow and hydraulic pressure sensor integrates the functions of a flow sensor and a hydraulic pressure sensor and can monitor the extraction flow and oil pressure in real time. By pre-setting the waste oil discharge amount, flushing oil extraction amount, and sample oil amount through the control display panel 28, the oil extraction amount can be monitored by the flow and hydraulic pressure sensor and fed back to the PCL module 24, and the PCL module 24 will independently control the stop of oil extraction. The flow and hydraulic pressure sensor 29 can reflect the oil pressure situation in the transformer. If the data is abnormal, it indicates that there is a problem with the transformer, which will cause the PCL module 24 to command the light-emitting diode to emit an alarm.

[0031] The oil sample container 14 is a syringe, and the syringe interface is connected to the interface Ⅲ 13. When extracting the sample oil, the piston of the syringe is pushed backward under the pressure of the pump to accommodate the sample oil. After removing the syringe, the piston rod can be pushed to send the sample oil to the testing instrument.

[0032] A cavity 30 for oil flow is provided on the inlet oil pipe 5. An ultrasonic transducer 31 is provided in the hollow housing 1. The piezoelectric material of the ultrasonic transducer 31 is arranged in the cavity 30. The ultrasonic transducer 31 is electrically connected to the PCL module 24. The ultrasonic transducer 31 converts electrical energy into mechanical energy and releases it through the piezoelectric material, transfers the vibration to the oil through the cavity 30 to generate a cavitation effect, and generates an impact force through the rupture of tiny bubbles, thereby removing the waste oil in the pipeline and achieving the purpose of cleaning.

[0033] The hollow housing 1 includes: a first compartment 32 for integrally installing the oil sample extraction pump 2, the pipeline cleaning pump 3, the waste oil discharge pump 4, the four-way solenoid valve 9, the three-way solenoid valve 16, the controller, the flow and hydraulic pressure sensor 29, and the ultrasonic transducer 31; a second compartment 33 for placing the bracket of the oil sample container 14; and a tool bin 34.

[0034] The bracket is a detachable clamp 35. A transparent door 37 is installed in the first compartment 32 through a damping hinge 36, and a snap-on door 39 is installed in the second compartment 33 through an alloy hinge 38. The detachable clamp 35 is used to install / dismount the oil sample container 14, and the transparent door 37 is used to observe the situation inside the oil sample container 14.

[0035] A handle 40 is provided on the hollow housing 1.

[0036] When the transformer oil sample sealed collection device of the present invention is in use: The staff carries the transformer oil sample sealed collection device to the sampling transformer, firmly docks the sampling valve joint 6 with the sampling valve, and opens the tool bin 34 to take out the drain pipe 23; The staff triggers the waste oil discharge command through the control display panel 28: The controller starts the waste oil discharge pump 4 and opens the following pipeline channels: The precipitated oil that has not participated in the transformer circulation enters the inlet oil pipe 5 through the sampling valve - inlet end Ⅰ 7 - oil sample extraction pump 2 - outlet end Ⅰ 8 - interface Ⅰ 10 - four-way solenoid valve 9 - interface Ⅳ 15 - interface Ⅴ 17 - three-way solenoid valve 16 - interface Ⅶ 20 - inlet end Ⅲ 21 - waste oil discharge pump 4 - outlet end Ⅲ 22 - drain pipe 23; When the flow and hydraulic pressure sensor detects that the waste oil discharge amount reaches the set value, the controller stops the waste oil discharge command and closes the pipeline.

[0037] The staff triggers the cleaning instruction by controlling the display panel 28: The controller starts the pipeline cleaning pump 3 and the ultrasonic transducer 31, and opens the following pipeline channels: circulating flushing oil - inlet pipe 5 - inlet end Ⅰ 7 - oil sample extraction pump 2 - outlet end Ⅰ 8 - interface Ⅰ 10 - four-way solenoid valve 9 - inlet end Ⅱ 12 - pipeline cleaning pump 3 - outlet end Ⅱ 18 - interface Ⅵ 19 - three-way solenoid valve 16 - interface Ⅶ 20 - inlet end Ⅲ 21 - waste oil discharge pump 4 - outlet end Ⅲ 22 - drain pipe 23; When the flow hydraulic sensor detects that the cleaning oil reaches the set value, the controller stops the cleaning instruction and closes the pipeline and the ultrasonic transducer 31.

[0038] The staff triggers the sampling instruction by controlling the display panel 28: The controller starts the oil sample extraction pump 2 and opens the following pipeline: sample oil - inlet pipe 5 - inlet end Ⅰ 7 - oil sample extraction pump 2 - outlet end Ⅰ 8 - interface Ⅰ 10 - four-way solenoid valve 9 - interface Ⅲ 13 - oil sample container 14; When the flow hydraulic sensor detects that the extracted sample oil reaches the set value, the controller stops the cleaning instruction.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A sealed sampling device for transformer oil samples, characterized in that Including: A hollow housing (1), an oil sample extraction pump (2), a pipeline cleaning pump (3), and a waste oil discharge pump (4) disposed within the hollow housing (1); The inlet end I (7) of the oil sample extraction pump (2) is connected to an inlet pipe (5), and the other end of the inlet pipe (5) is provided with a sampling valve joint (6); The outlet end I (8) of the oil sample extraction pump (2) is connected to an interface I (10) of a four-way solenoid valve (9); the interface II (11) of the four-way solenoid valve (9) is connected to the inlet end II (12) of the pipeline cleaning pump (3); The transformer oil sample sealed collection device further includes: an oil sample container (14) connected to an interface III (13) of the four-way solenoid valve (9); The interface IV (15) of the four-way solenoid valve (9) is connected to an interface V (17) of a three-way solenoid valve (16); The outlet end II (18) of the pipeline cleaning pump (3) is connected to an interface VI (19) of the three-way solenoid valve (16); The interface VII (20) of the three-way solenoid valve (16) is connected to the inlet end III (21) of the waste oil discharge pump (4); The outlet end III (22) of the waste oil discharge pump (4) is connected to a drain pipe (23); The transformer oil sample sealed collection device further includes: a controller electrically connected to the oil sample extraction pump (2), the pipeline cleaning pump (3), the waste oil discharge pump (4), the four-way solenoid valve (9), and the three-way solenoid valve (16).

2. The sealed sampling device for transformer oil sample according to claim 1, characterized in that: The controller includes: a PCL module (24), a power supply module (25) electrically connected to the PCL module (24), a relay module (26) electrically connected to the PCL module (24), a motor drive module (27) electrically connected to the PCL module (24), and a control display panel (28) embedded on the surface of the hollow housing (1) and electrically connected to the PCL module (24).

3. The oil sample sealing and collecting device for a transformer according to claim 2, wherein: The battery is provided with an ADC module and a MOSFET module electrically connected to the PCL module (24).

4. A transformer oil sample sealing and collecting device according to claim 3, characterized in that: A flow hydraulic sensor (29) is disposed between the outlet end I (8) and the interface I (10), and the flow hydraulic sensor (29) is electrically connected to the PCL module (24).

5. The sealed sampling device for transformer oil sample according to claim 4, wherein: The oil sample container (14) is a syringe, and the syringe interface is connected to the interface III (13).

6. The sealed sampling device for transformer oil sample according to claim 5, characterized in that: The inlet pipe (5) is provided with a cavity (30) for oil to flow through, and an ultrasonic transducer (31) is disposed within the hollow housing (1). The piezoelectric material of the ultrasonic transducer (31) is disposed within the cavity (30), and the ultrasonic transducer (31) is electrically connected to the PCL module (24).

7. The sealed sampling device for transformer oil sample according to claim 6, characterized in that: The hollow housing (1) includes: a first compartment (32) integrally mounting the oil sample extraction pump (2), the pipeline cleaning pump (3), the waste oil discharge pump (4), the four-way solenoid valve (9), the three-way solenoid valve (16), the controller, the flow hydraulic sensor (29), and the ultrasonic transducer (31), a second compartment (33) for placing the bracket of the oil sample container (14), and a tool bin (34).

8. The sealed sampling device for transformer oil sample according to claim 6, characterized in that: The bracket is a detachable hoop (35). The first compartment (32) is provided with a transparent door (37) installed through a damping hinge (36), and the second compartment (33) is provided with a snap door (39) installed through an alloy hinge (38).

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