1. A plant insulating oil test device is characterized by comprising a pressure tank, a driving mechanism, an oil filter, a high-voltage electrode, a low-voltage electrode and an electric heater;

the low-voltage electrode is fixedly arranged in the pressure tank;

the high-voltage electrode is movably arranged in the pressure tank;

the driving mechanism is connected with the high-voltage electrode and used for driving the high-voltage electrode to move so as to adjust a gap between the high-voltage electrode and the low-voltage electrode;

the electric heater is used for heating the insulating oil to be tested in the pressure tank;

the oil inlet pipe of the oil filter passes through the lower end position of the outer side wall of the pressure tank or the bottom position of the pressure tank and is communicated with the pressure tank, and the oil outlet pipe of the oil filter passes through the upper end position of the outer side wall of the pressure tank or the top position of the pressure tank and is communicated with the pressure tank.

2. The vegetable insulating oil test device of claim 1, further comprising a conductive copper rod;

the conductive copper rod is movably inserted in the pressure tank along the vertical direction through a sliding shaft sealing element;

the high-voltage electrode is integrally connected to one end part of the conductive copper rod extending into the pressure tank;

and an insulating sheath is coated outside the conductive copper rod.

3. The vegetable insulating oil test device of claim 2, wherein the conductive copper rod is sleeved with an inherent insulating connecting plate on a rod section extending out of the pressure tank;

an extending part extends upwards from one end of the insulating connecting plate;

and the driving end of the driving mechanism is connected with the extension part and is used for driving the conductive copper rod to move so as to drive the high-voltage electrode to move.

4. The vegetable insulating oil test device according to claim 3, wherein the driving mechanism is a screw mechanism, and comprises a guide rail seat, a screw, a motor and a slide block;

the guide rail seat is vertically arranged on the top of the pressure tank and is positioned beside the conductive copper rod;

the screw rod is pivoted with the guide rail seat;

the motor is arranged at the top of the guide rail seat, and an output shaft is connected with the screw rod and used for driving the screw rod to rotate;

the sliding block is arranged on the guide rail seat in a sliding mode along the vertical direction and is provided with a threaded hole through which the screw rod penetrates and is in threaded fit with the screw rod;

the slider is connected with the extension.

5. The vegetable insulating oil test device of claim 1, wherein the electric heating head of the electric heater extending into the pressure tank is made of iron-iron alloy.

6. The vegetable insulating oil test device of claim 1, wherein the pressure tank comprises a tank body and a flange sealing cover;

the flange sealing cover is arranged at the top of the tank body in a sealing way.

7. The vegetable insulating oil testing device of claim 6, wherein an O-shaped sealing ring is arranged between the flange sealing cover and the top of the tank body.

8. The vegetable insulating oil test device of claim 6, wherein the tank body is a transparent tank body.

9. The vegetable insulating oil test device of claim 1, further comprising a pressure gauge;

the pressure gauge is arranged on the pressure tank and used for detecting the internal pressure of the pressure tank.

10. The vegetable insulating oil testing device of claim 1, further comprising a controller;

the controller is respectively electrically connected with the driving mechanism, the oil filter and the electric heater.

Background

The plant insulating oil is used as a new substitute technology of the traditional mineral insulating oil, has the advantages of biodegradability, flame retardance and good fireproof performance, and becomes a preferable liquid insulating medium for power equipment in the scenes of underground substations, offshore wind power platforms, water source substations and the like.

The electrical equipment such as an oil immersed transformer is subjected to comprehensive action of electricity and heat during operation, so that the vegetable insulating oil is degraded, and the insulating property is influenced. Therefore, the development of the insulation characteristic test of the vegetable insulating oil under the combined action of electricity and heat is an important means for evaluating the aging state of the vegetable insulating oil so as to facilitate the more planned use of the vegetable insulating oil. The present plant insulating oil characteristic test device still has not enough at the test result accuracy, just needs to change the plant insulating oil after experimental at every turn moreover, leads to the plant insulating oil waste serious, increases the testing cost.

Disclosure of Invention

In view of this, the purpose of this application is to provide a plant insulating oil test device, and the test result accuracy is better, can realize using the manifold cycles of plant insulating oil moreover, avoids the plant insulating oil extravagant, reduces testing cost.

In order to achieve the technical purpose, the application provides a plant insulating oil test device which comprises a pressure tank, a driving mechanism, an oil filter, a high-voltage electrode, a low-voltage electrode and an electric heater, wherein the pressure tank is connected with the driving mechanism;

the low-voltage electrode is fixedly arranged in the pressure tank;

the high-voltage electrode is movably arranged in the pressure tank;

the driving mechanism is connected with the high-voltage electrode and used for driving the high-voltage electrode to move so as to adjust a gap between the high-voltage electrode and the low-voltage electrode;

the electric heater is used for heating the insulating oil to be tested in the pressure tank;

the oil inlet pipe of the oil filter passes through the lower end position of the outer side wall of the pressure tank or the bottom position of the pressure tank and is communicated with the pressure tank, and the oil outlet pipe of the oil filter passes through the upper end position of the outer side wall of the pressure tank or the top position of the pressure tank and is communicated with the pressure tank.

Further, the device also comprises a conductive copper rod;

the conductive copper rod is movably inserted in the pressure tank along the vertical direction through a sliding shaft sealing element;

the high-voltage electrode is integrally connected to one end part of the conductive copper rod extending into the pressure tank;

and an insulating sheath is coated outside the conductive copper rod.

Further, an insulating connecting plate is fixedly sleeved on the rod section of the conductive copper rod extending out of the pressure tank;

an extending part extends upwards from one end of the insulating connecting plate;

and the driving end of the driving mechanism is connected with the extension part and is used for driving the conductive copper rod to move so as to drive the high-voltage electrode to move.

Furthermore, the driving mechanism is a screw rod mechanism and comprises a guide rail seat, a screw rod, a motor and a slide block;

the guide rail seat is vertically arranged on the top of the pressure tank and is positioned beside the conductive copper rod;

the screw rod is pivoted with the guide rail seat;

the motor is arranged at the top of the guide rail seat, and an output shaft is connected with the screw rod and used for driving the screw rod to rotate;

the sliding block is arranged on the guide rail seat in a sliding mode along the vertical direction and is provided with a threaded hole through which the screw rod penetrates and is in threaded fit with the screw rod;

the slider is connected with the extension.

Furthermore, the electric heating head of the electric heater extending into the pressure tank is made of iron-baking alloy.

Further, the pressure tank comprises a tank body and a flange sealing cover;

the flange sealing cover is arranged at the top of the tank body in a sealing way.

Furthermore, an O-shaped sealing ring is arranged between the flange sealing cover and the top of the tank body.

Further, the tank body is a transparent tank body.

Further, a pressure gauge is also included;

the pressure gauge is installed on the pressure tank and used for detecting the internal pressure of the pressure tank.

Further, the device also comprises a controller;

the controller is respectively electrically connected with the driving mechanism, the oil filter and the electric heater.

According to the technical scheme, the test device is constructed by the pressure tank, the driving mechanism, the oil filter, the high-voltage electrode, the low-voltage electrode and the electric heater. The oil filter is communicated with the internal circulation of the pressure tank, and after initial oil injection, the oil filter can be used for initially filtering the insulating oil to be tested in the pressure tank, filtering impurities, moisture and gas in the insulating oil to be tested, and ensuring the accuracy of a subsequent test. But also can be used for filtering the insulating oil to be tested after the electric fault is simulated, so that the insulating oil to be tested after the electric fault is simulated can be repeatedly used, the waste of the insulating oil is avoided, and the test cost is reduced. In addition, the high-voltage electrode is movably arranged and is driven by the driving mechanism, so that the gap between the high-voltage electrode and the low-voltage electrode can be adjusted, the simulated electrical fault tests under different gaps can be realized, the diversity of test data is increased, and data support is better provided for the aging state evaluation.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a vegetable insulating oil testing device provided in the present application with a controller;

in the figure: 1. an oil filter; 2. an oil inlet pipe; 3. an electric heater; 4. a tank body; 5. a low voltage electrode; 6. a high voltage electrode; 7. an insulating sheath; 8. insulating oil to be tested; 9. an oil outlet pipe; 10. an oil filling pipe; 11. a flange sealing cover; 12. an O-shaped sealing ring; 13. a pressure gauge; 14. a conductive copper rod; 15. an insulating connecting plate; 16. a screw rod; 17. a motor; 18. a guide rail seat; 19. a slider; 20. a sliding shaft seal; 21. and a controller.

Detailed Description

The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

The embodiment of the application discloses vegetable insulating oil test device.

Referring to fig. 1, an embodiment of a plant insulating oil testing apparatus provided in an embodiment of the present application includes:

the device comprises a pressure tank, a driving mechanism, an oil filter 1, a high-voltage electrode 6, a low-voltage electrode 5 and an electric heater 3. The mode of carrying out the oiling for the pressure vessel in this application can be that be connected with oiling pipe 10 at the pressure vessel, and oiling pipe 10 then can connect oil supply unit for receive the input of waiting to test insulating oil 8. The gas acquisition after the simulation of the electrical fault can be realized by connecting a gas sampling tube (not shown) to the pressure tank, and the gas sampling tube can be connected with an analyzer and used for conveying the gas generated by the simulation of the electrical fault to the analyzer for analysis. For convenience of control, the oil filling pipe 10 and the gas sampling pipe may be provided with control valves, and those skilled in the art may understand the structure of the existing testing device or directly design the oil filling and gas sampling modes of the existing testing device, which will not be described in detail.

The low-voltage electrode 5 is fixedly arranged in the pressure tank, the high-voltage electrode 6 is movably arranged in the pressure tank, and the driving mechanism is connected with the high-voltage electrode 6 and used for driving the high-voltage electrode 6 to move so as to adjust a gap between the high-voltage electrode 6 and the low-voltage electrode 5.

The electric heater 3 is used for heating the insulating oil 8 to be tested in the pressure tank.

The oil inlet pipe 2 of the oil filter 1 is communicated with the interior of the pressure tank through the lower end position of the outer side wall of the pressure tank or the bottom position of the pressure tank, the oil outlet pipe 9 of the oil filter 1 is communicated with the pressure tank through the upper end position of the outer side wall of the pressure tank or the top position of the pressure tank, and the oil inlet pipe 2 and the oil outlet pipe 9 are connected, so that insulating oil in the pressure tank can be subjected to sufficient circulating filtration. Oil filter 1 in this application can be conventional oil filtering equipment, for realizing better oil filtering effect, specifically can be multistage oil filtering equipment, gets rid of impurity in the vegetable insulating oil through multistage cartridge filter, and the in-process adopts the vacuum to spray the mode and goes out dissolved gas in the vegetable insulating oil and adopts the polymerization separation mode to detach liquid water and free water in the vegetable insulating oil, and the technical staff in the art can combine existing oil filter 1 to understand, does not need to describe in detail. The power of oil liquid circulating transportation realized by the oil filter 1 in the application can be provided by a circulating pump arranged on the oil filter 1, and certainly, if the oil filter 1 is not provided with a pump structure, the circulating pump can be automatically added without limitation. In addition, in the application, two control valves which are arranged at intervals can be arranged on the oil inlet pipe 2 and the oil outlet pipe 9 of the oil filter 1, and the design can be realized by connecting a branch pipe with a control valve at the position of a pipe section between the two control valves on the oil inlet pipe 2 and the oil outlet pipe 9, so that the insulating oil conveyed into the oil filter 1 from a pressure tank can be intercepted, the sampling of the insulating oil after the electric fault is simulated is facilitated, and an insulating oil sampling pipe is not additionally arranged; the realization is to the interception of the insulating oil of carrying to the overhead tank from oil filter 1 to detect the insulating oil after filtering, in order to judge whether oil filter 1 is unusual.

In general, the present application constructs a test apparatus by a pressure tank, a driving mechanism, an oil filter 1, a high voltage electrode 6, a low voltage electrode 5, and an electric heater 3. The oil filter 1 and the pressure tank are communicated in an internal circulation mode, initial filtration can be performed on the to-be-tested insulating oil 8 in the pressure tank after initial oil injection, impurities, moisture and gas in the to-be-tested insulating oil 8 are filtered, and accuracy of a follow-up test is guaranteed. But also can be used for filtering the insulating oil 8 to be tested after the electric fault is simulated, so that the insulating oil 8 to be tested after the electric fault is simulated can be repeatedly used, the waste of the insulating oil is avoided, and the test cost is reduced. In addition, the high-voltage electrode 6 is movably arranged and is driven by the driving mechanism, so that the gap between the high-voltage electrode 6 and the low-voltage electrode 5 can be adjusted, the simulated electrical fault tests under different gaps can be realized, the diversity of test data is increased, and data support is better provided for the aging state evaluation.

The above is a first embodiment of the plant insulating oil testing apparatus provided in the embodiments of the present application, and the following is a second embodiment of the plant insulating oil testing apparatus provided in the embodiments of the present application, please refer to fig. 1 specifically.

The scheme based on the first embodiment is as follows:

further, in the case of the movable arrangement of the high voltage electrode 6, this can be achieved by the provision of a conductive copper rod 14. Specifically, the conductive copper rod 14 is movably inserted into the pressure tank along the vertical direction through the sliding shaft sealing element 20, that is, the conductive copper rod 14 is slidably inserted into the pressure tank along the vertical direction in a sealing manner, and the sliding shaft sealing element 20 is arranged to ensure that the conductive copper rod 14 can slide up and down and can also be in sealing fit with the pressure tank. In addition, in order to ensure the safe use of the conductive copper rod 14, the conductive copper rod 14 is coated with an insulating sheath 7. Furthermore, the high voltage electrode 6 can be integrally connected to one end of the conductive copper rod 14 extending into the pressure tank, that is, one end of the conductive copper rod 14 extending into the pressure tank directly forms the corresponding high voltage electrode 6. Of course, the high voltage electrode 6 and the conductive copper rod 14 may be detachably engaged, and are not particularly limited. In terms of the vertical distribution of the low-voltage electrode 5 and the high-voltage electrode 6, the low-voltage electrode 5 can be distributed at the bottom of the pressure tank and can be in a T-shaped structure as shown in the figure, and one end of the vertical part can extend out of the pressure tank to realize grounding, and the grounding is not particularly limited.

Further, in order to facilitate driving the conductive copper rod 14 to move, an insulating connecting plate 15 may be fixedly sleeved on the conductive copper rod 14 on the rod section extending out of the pressure tank. Wherein, an end of the insulating connecting plate 15 extends upward to form an extension, so that the insulating connecting plate 15 is integrally formed into an L-shaped structure rotated clockwise by ninety degrees. The driving end of the driving mechanism is connected with the extending part and is used for driving the conductive copper rod 14 to move so as to drive the high-voltage electrode 6 to move. Through the design of the extension part, the height of the conductive copper rod 14 connected with the driving end of the driving mechanism can be increased, so that the design height of the driving mechanism is not limited too, the length of the conductive copper rod 14 is not increased to solve the problem that the design height of the driving mechanism is limited, and the design and manufacturing cost is reduced.

Taking the design of the conductive copper rod 14 as an example, the driving mechanism may be an electric push rod, a hydraulic push rod, a linear sliding table, a screw rod 16 mechanism, etc., and it is sufficient to drive the conductive copper rod 14 to move by driving the insulating connecting plate 15 to move up and down, without limitation.

Further, taking the driving mechanism as a lead screw 16 mechanism as an example, the driving mechanism includes a rail seat 18, a lead screw 16, a motor 17 and a slider 19. The guide rail seat 18 is vertically installed at the top of the pressure tank and located beside the conductive copper rod 14, the lead screw 16 is pivoted to the guide rail seat 18, the motor 17 is installed at the top of the guide rail seat 18, an output shaft is connected with the lead screw 16 and used for driving the lead screw 16 to rotate, the sliding block 19 is installed on the guide rail seat 18 in a sliding mode along the vertical direction and provided with a threaded hole for the lead screw 16 to penetrate through and in threaded fit with the lead screw 16, and the sliding block 19 is connected with the extending portion. The motor 17 drives the screw rod 16 to rotate forward and backward, so as to drive the slide block 19 to move up and down, and drive the conductive copper rod 14 to move up and down, thereby realizing the gap adjustment between the high-voltage electrode 6 and the low-voltage electrode 5.

Further, the electric heating head of the electric heater 3 extending into the pressure tank is made of iron-baking alloy. Iron-baked alloy resistivity 1.4 x 10^-6Omega m, the maximum tolerance temperature of 1400 ℃, and the heat resistance of the electric heating head is better improved. The electric heater 3 of this application can directly follow current electric heating equipment, or improve based on current electric heating equipment, does not do and does not describe repeatedly. The electric heater 3 may also be designed with a temperature sensor, so that the temperature sensor does not need to be additionally arranged inside the pressure tank, and certainly, the temperature sensor may also be additionally arranged inside the pressure tank, which is not limited specifically. In addition, in order to uniformly heat the insulating oil 8 to be tested in the pressure tank, an additional device can be addedPut rabbling mechanism (not shown in the figure) for stir the insulating oil 8 of waiting to test in the pressure tank when electric heater 3 is worked, improve heating efficiency and make the heating more even simultaneously.

Further, the pressure tank structure comprises a tank body 4 and a flange sealing cover 11. The flange sealing cover 11 is sealed and arranged on the top of the tank body 4.

Further, in order to better realize the sealing connection between the flange sealing cover 11 and the tank 4, an O-ring 12 is arranged between the flange sealing cover 11 and the top of the tank 4. The O-shaped sealing ring 12 can be made of fluororubber materials and has good sealing performance and heat resistance. In a similar way, the oil injection pipe 10, the gas sampling pipe, the oil inlet pipe 2 and the oil outlet pipe 9 can be further connected with the pressure tank in a sealing way through the O-shaped sealing ring 12.

Further, the tank 4 may be a transparent tank for better observing the inside of the pressure tank. The pot body 4 made of the acrylic material can be 50mm thick, and the endurable air pressure is lower than 100Pa, and the pot body is not limited specifically. Of course, as for the transparent design, the can body 4 may also be a partially transparent design, for example, a transparent viewing window is added locally, and the like, which is not limited specifically.

Further, in order to better monitor the internal pressure of the pressure tank, the pressure measuring device further comprises a pressure gauge 13, and the pressure gauge 13 is mounted on the pressure tank and used for detecting the internal pressure of the pressure tank. Certainly, in order to adjust the internal pressure of the pressure tank better and realize more diversified tests, a vacuum pump (not shown) can be additionally arranged and communicated with the inside of the pressure tank for adjusting the internal pressure of the pressure tank, and the vacuum pump can be utilized to realize gas sampling, so that the arrangement of an additional gas sampling pipe is saved, and the limitation is not made.

Further, in order to facilitate the operation control, a controller 21 may be further provided, and the controller 21 is electrically connected to the driving mechanism, the oil filter 1, and the electric heater 3, respectively. The controller 21 may be a single-axis controller, and is not limited in particular.

The test process of the application is as follows:

1, the controller 21 controls to open the control valve on the oil filling pipe 10, inject the insulating oil 8 to be tested into the pressure tank, and close the control valve on the oil filling pipe 10 after injecting a certain amount.

And 2, controlling to start the oil filter 1 to work for a preset time through the controller 21 so as to finish filtering the to-be-tested insulating oil 8 in the pressure tank after oil injection.

And 3, controlling the power supply device to apply specific voltage to the high-voltage electrode 6 for preset time through the controller 21, and finishing the process of simulating the electrical fault.

And 4, after the simulation of the electrical fault is completed, sampling gas from the pressure tank and analyzing the gas by an analyzer, or sampling insulating oil after the simulation of the electrical fault from the pressure tank and analyzing the insulating oil.

And 5, after the last electric fault simulation operation is finished, if the electric fault simulation needs to be carried out again, controlling the oil filter 1 to work again so as to filter the insulating oil after the electric fault simulation, and after the electric fault simulation is finished, simulating the electric fault.

While the plant insulating oil testing apparatus provided by the present application has been described in detail, those skilled in the art will appreciate that the present disclosure is not limited thereto, and that the present disclosure can be modified in various embodiments and applications.