Automatic oil extraction device for transformer oil sample

Abstract

The utility model relates to an automatic oil extraction device for a transformer oil sample. The waste oil barrel is arranged in the sampling box body; the lifting mechanism is arranged in the sampling box body; the oil storage cylinder is driven by the lifting mechanism, the oil storage cylinder comprises a first cavity and a second cavity, the first cavity and the second cavity are isolated through a piston and are adjustable in volume, and the oil inlet end of the first cavity and the oil inlet end of the second cavity are connected to a transformer oil tank through a three-way valve; the oil outlet end of the first cavity and the oil outlet end of the second cavity are communicated to the waste oil barrel through corresponding valves; and the control system is used for discharging oil in the first cavity into the waste oil barrel when the oil storage cylinder discharges oil.

Description

Technical Field

[0001] The utility model relates to the field of oil extraction devices, in particular to an automatic oil extraction device for transformer oil samples. Background Art

[0002] Oil-immersed transformers use oil as the main insulation means of the transformer, and rely on oil as a cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling and forced oil circulation, etc. The transformer is immersed in transformer oil to maintain an insulating and low-humidity environment, and the transformer oil can also absorb the heat generated during the operation of the transformer.

[0003] Good transformer oil should be a clean and transparent liquid, without sediment, mechanical impurities, suspended matter and cotton-like substances. If it is contaminated and oxidized, and resin and sediment are produced, the quality of the transformer oil will deteriorate, and the color will gradually change to light red until it becomes a dark brown liquid. When the transformer is faulty, the color of the oil will also change. Generally, transformer oil should not be used when it is light brown. In addition, transformer oil can appear turbid and milky, black and dark in color. Therefore, the transformer needs to be lifted up to sample the transformer oil during use to understand the status of the transformer oil. Since the environment in which the transformer oil is located changes after leaving the transformer, it is easily polluted by the external environment. The existing transformer oil sampling mainly relies on manual sampling, or simply extracting the transformer oil. The oil sample is easily disturbed by the external environment and deteriorates, affecting the results of the oil sampling.

[0004] The purpose of this utility model is to design an automatic oil sampling device for transformer oil in view of the above-mentioned problems in the prior art. Utility Model Content

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides an automatic oil sampling device for transformer oil, which can effectively solve at least one problem existing in the above-mentioned prior art.

[0006] The technical solution of the utility model is:

[0007] A transformer oil sample automatic oil sampling device, comprising:

[0008] Sampling box;

[0009] A waste oil barrel is arranged in the sampling box;

[0010] A lifting mechanism is arranged in the sampling box;

[0011] An oil storage cylinder, driven by the lifting mechanism, comprising a first cavity and a second cavity, the first cavity and the second cavity are separated by a piston and have adjustable volumes, the oil inlet ends of the first cavity and the second cavity are connected to the transformer oil tank through a three-way valve, and the oil outlet ends of the first cavity and the second cavity are connected to the waste oil barrel through corresponding valves;

[0012] A control system, when the oil storage cylinder extracts oil from the transformer oil tank, the control system controls the three-way valve to connect the oil path between the first cavity and the transformer oil tank, close the oil path between the second cavity and the transformer oil tank, open the valve at the oil outlet end of the second cavity, and close the valve at the oil outlet end of the first cavity, thereby introducing the transformer oil into the oil storage cylinder; when the oil storage cylinder discharges oil, the control system controls the three-way valve to connect the oil path between the second cavity and the transformer oil tank, close the oil path between the first cavity and the transformer oil tank, open the valve at the oil outlet end of the first cavity, and close the valve at the oil outlet end of the second cavity, thereby discharging the oil in the first cavity into the waste oil barrel.

[0013] Furthermore, the lifting mechanism includes a tray and a lifting push rod, the oil storage cylinder is arranged on the tray, and the lifting push rod is used to drive the tray to move up and down.

[0014] Furthermore, the tray is provided with oil guide holes at the oil outlet ends corresponding to the first cavity and the second cavity, and the oil discharged from the first cavity and the second cavity flows into the waste oil barrel through the oil guide holes.

[0015] Furthermore, the waste oil barrel is arranged below one of the oil guide holes, and an oil guide plate is arranged below the other oil guide hole, and the oil guide plate guides the transformer oil flowing out of the corresponding oil guide hole into the waste oil barrel.

[0016] Furthermore, the oil guide plate is arranged at an angle, the lower end of the oil guide plate is connected to the upper end of the waste oil barrel, the oil guide plate is provided with a guide hole for the push rod to pass through, and a baffle is arranged around the guide hole.

[0017] Furthermore, it includes a remote controller, which is communicatively connected to a corresponding client, and is used to receive instructions issued by the client and forward them to the control system.

[0018] Furthermore, it comprises a photovoltaic panel and a storage battery, wherein the photovoltaic panel converts solar energy into electrical energy and stores the electrical energy in the storage battery, and the storage battery supplies power to the control system or the remote controller.

[0019] Furthermore, a booster pump is connected in series between the transformer oil tank and the three-way valve.

[0020] Furthermore, the waste oil barrel is provided with an immersion sensor on its inner wall, and the waste oil barrel is connected to an oil discharge pump.

[0021] Furthermore, a main valve is connected between the transformer oil tank and the three-way valve.

[0022] Therefore, the utility model provides the following effects and / or advantages:

[0023] The utility model samples oil from a transformer mailbox through an oil storage cylinder, and realizes sampling and oil discharge through different opening conditions of a three-way valve and a valve, thereby having a self-cleaning function, and preventing the oil sample remaining in the oil storage cylinder from deteriorating due to long-term external environmental interference and affecting the result of the next sampling.

[0024] The utility model drives the oil storage cylinder to move up and down through the lifting mechanism, and can send the oil storage cylinder to the top of the sampling oil tank after the oil production is completed, so that the staff can take the oil sample conveniently.

[0025] The utility model can guide the waste oil discharged from the oil storage cylinder into the waste oil barrel by arranging the oil guide plate.

[0026] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the invention. The purpose and other advantages of the invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0027] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0029] Figure 2 It is a structural cross-sectional view of an embodiment of the utility model.

[0030] Figure 3 Schematic diagram of the oil path during sampling in an embodiment of the present utility model.

[0031] Figure 4 It is a schematic diagram of the oil path when draining oil in an embodiment of the utility model.

[0032] Figure 5 It is a schematic diagram of the structure of the pallet.

[0033] Figure 6 It is a structural schematic diagram of the oil guide plate. DETAILED DESCRIPTION

[0034] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the accompanying drawings:

[0035] Embodiment 1

[0036] refer to Figure 1-6 , a transformer oil sample automatic oil sampling device, comprising:

[0037] Sampling box 1; the sampling box 1 may be provided with an openable top cover (not shown), so as to provide dust and rainproof effects in the external environment.

[0038] A waste oil barrel 2 is arranged in the sampling box 1;

[0039] A lifting mechanism 3 is arranged in the sampling box 1;

[0040] The oil storage cylinder 4 is driven by the lifting mechanism 3, and includes a first cavity 401 and a second cavity 402. The first cavity 401 and the second cavity 402 are separated by a piston 403 and have adjustable volumes. The oil inlet ends of the first cavity 401 and the second cavity 402 are connected to the transformer oil tank through a three-way valve 5, and the oil outlet ends of the first cavity 401 and the second cavity 402 are connected to the waste oil barrel 2 through corresponding valves 6;

[0041] In this embodiment, the oil storage cylinder 4 is a cylinder structure, and a piston 403 is arranged inside it. The volume of the first cavity 401 and the second cavity 402 is adjusted by the left and right movement of the piston 403. The sum of the volumes of the first cavity 401 and the second cavity 402 remains unchanged. For example, when a certain oil pressure is applied to the first cavity 401, the piston 403 moves to the right, thereby increasing the volume of the first cavity 401 and reducing the volume of the second cavity 402. The oil outlet ends of the first cavity 401 and the second cavity 402 are connected to the waste oil barrel 2 through corresponding valves 6, and the oil outlet ends of the first cavity 401 or the second cavity 402 can be controlled to open, thereby discharging the oil or air in the cavity.

[0042] The control system controls the three-way valve 5 to connect the oil path between the first cavity 401 and the transformer oil tank, close the oil path between the second cavity 402 and the transformer oil tank, open the valve 6 at the oil outlet end of the second cavity 402, and close the valve 6 at the oil outlet end of the first cavity 401, so as to introduce the transformer oil into the oil storage cylinder 4; when the oil storage cylinder 4 discharges oil, the control system controls the three-way valve 5 to connect the oil path between the second cavity 402 and the transformer oil tank, close the oil path between the first cavity 401 and the transformer oil tank, open the valve 6 at the oil outlet end of the first cavity 401, and close the valve 6 at the oil outlet end of the second cavity 402, so as to discharge the oil in the first cavity 401 into the waste oil barrel.

[0043] The oil path connection path when the oil storage cylinder 4 extracts oil from the transformer oil tank is referenced Figure 3 The oil path connection path of the oil storage cylinder 4 when discharging oil is referenced Figure 4 By repeatedly alternating oil extraction and oil discharge, the residual sample accumulated after the last sampling in the first cavity 401 can be flushed and removed by the transformer oil in the transformer mailbox, thereby achieving a self-cleaning effect of the oil storage cylinder 4, preventing the accumulated residual sample from deteriorating in the outside world and affecting the quality of the oil sample sampled next time.

[0044] In this embodiment, the waste oil barrel 2 can be arranged on one side of the sampling box 1.

[0045] By controlling the conduction direction of the three-way valve 5 and the opening and closing of the valve 6, the oil storage cylinder 4 is controlled to perform sampling or oil discharge. This process can be completed without human intervention. The certain oil pressure in the transformer oil tank is utilized, so that when the three-way valve 5 is conducted, the oil pressure in the transformer oil tank pushes the piston 403 to move.

[0046] Furthermore, the lifting mechanism 3 includes a tray 301 and a lifting push rod 302 . The oil storage cylinder 4 is disposed on the tray 301 . The lifting push rod 302 is used to drive the tray 301 to move up and down.

[0047] In this embodiment, the lifting mechanism 3 can drive the oil storage cylinder 4 to move up and down, thereby driving the oil storage cylinder 4 to sink into the sampling box 1 under normal conditions. When the sampling is completed, the oil storage cylinder 4 can be lifted above the sampling oil tank 1, so that the staff can go to the site to take away the oil storage cylinder 4 filled with oil for further testing.

[0048] Furthermore, the tray 301 is provided with oil guide holes 303 at the oil outlet ends corresponding to the first cavity 401 and the second cavity 402 , and the oil discharged from the first cavity 401 and the second cavity 402 flows into the waste oil barrel 2 through the oil guide holes 303 .

[0049] Furthermore, the waste oil barrel 2 is arranged below one of the oil guide holes 303 , and an oil guide plate 7 is arranged below the other oil guide hole 303 , and the oil guide plate 7 guides the transformer oil flowing out of the corresponding oil guide hole 303 into the waste oil barrel 2 .

[0050] Furthermore, the oil guide plate 7 is tilted, the lower end of the oil guide plate 7 is connected to the upper end of the waste oil barrel 2, the oil guide plate 7 is provided with a guide hole for the push rod 302 to pass through, and a baffle 701 is provided around the guide hole.

[0051] In this embodiment, the waste oil introduced by the oil guide hole 303 which is not arranged above the waste oil barrel 2 flows into the waste oil barrel 2 through the oil guide plate 4.

[0052] Furthermore, a remote controller 8 is included, which is communicatively connected to the corresponding client, and is used to receive instructions issued by the client and forward them to the control system. The remote controller 8 may include a PLC and a 4G wireless communication module, which is used to control the operation of the oil production device and the remote data transmission of data, and can realize several important functions such as automatic collection of transformer oil samples, automatic oil drainage, and automatic flushing.

[0053] Further, it includes a photovoltaic panel 9 and a battery, the photovoltaic panel converts solar energy into electrical energy and stores it in the battery, and the battery supplies power to the control system or the remote controller. The photovoltaic panel 9 and the battery, under normal lighting conditions, the photovoltaic panel can be stably charged and the battery can be discharged normally, the voltage meets the 24V requirement and the current value meets the maximum 6A design requirement, the battery is selected to be 24V-30Ah, and even in the case of no photovoltaic power generation, it can be fully charged and used for sampling 300 times.

[0054] Furthermore, a booster pump (not shown) is connected in series between the transformer oil tank and the three-way valve 5. When the oil pressure in the transformer oil tank cannot push the piston 403 to move and sample the oil in the oil storage cylinder 4, the booster pump can increase the pressure to ensure the completion of the oil sampling.

[0055] Furthermore, the waste oil barrel 2 is provided with an immersion sensor 201 on its inner wall, and the waste oil barrel is connected to an oil discharge pump 202 .

[0056] Furthermore, a main valve (not shown) is connected between the transformer oil tank and the three-way valve 5. The main valve is controlled by a control system, and sampling can be stopped by the main valve when sampling needs to be stopped urgently.

[0057] It should be noted that in the claims, any reference signs placed between brackets shall not be constructed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The utility model can be implemented with the aid of hardware comprising several different components and with the aid of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same hardware item. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0058] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A transformer oil sampling automatic oil sampling device, characterized in that: include: Sampling box; A waste oil barrel is arranged in the sampling box; A lifting mechanism is arranged in the sampling box; An oil storage cylinder, driven by the lifting mechanism, comprising a first cavity and a second cavity, the first cavity and the second cavity are separated by a piston and have adjustable volumes, the oil inlet ends of the first cavity and the second cavity are connected to the transformer oil tank through a three-way valve, and the oil outlet ends of the first cavity and the second cavity are connected to the waste oil barrel through corresponding valves; A control system, when the oil storage cylinder extracts oil from the transformer oil tank, the control system controls the three-way valve to connect the oil path between the first cavity and the transformer oil tank, close the oil path between the second cavity and the transformer oil tank, open the valve at the oil outlet end of the second cavity, and close the valve at the oil outlet end of the first cavity, thereby introducing the transformer oil into the oil storage cylinder; when the oil storage cylinder discharges oil, the control system controls the three-way valve to connect the oil path between the second cavity and the transformer oil tank, close the oil path between the first cavity and the transformer oil tank, open the valve at the oil outlet end of the first cavity, and close the valve at the oil outlet end of the second cavity, thereby discharging the oil in the first cavity into the waste oil barrel.

2. The automatic transformer oil sampling device according to claim 1, characterized in that: The lifting mechanism comprises a tray and a lifting push rod. The oil storage cylinder is arranged on the tray. The lifting push rod is used to drive the tray to move up and down.

3. The automatic transformer oil sampling device according to claim 2 is characterized in that: The tray is provided with oil guide holes at the oil outlet ends corresponding to the first cavity and the second cavity, and the oil discharged from the first cavity and the second cavity flows into the waste oil barrel through the oil guide holes.

4. The automatic transformer oil sampling device according to claim 3 is characterized in that: The waste oil barrel is arranged below one of the oil guide holes, and an oil guide plate is arranged below the other oil guide hole, and the oil guide plate guides the transformer oil flowing from the corresponding oil guide hole into the waste oil barrel.

5. The automatic transformer oil sampling device according to claim 4, characterized in that: The oil guide plate is arranged obliquely, the lower end of the oil guide plate is connected to the upper end of the waste oil barrel, the oil guide plate is provided with a guide hole for the push rod to pass through, and a baffle is arranged around the guide hole.

6. The transformer oil sampling automatic oil sampling device according to claim 1, characterized in that: It includes a remote controller, which is communicatively connected to a corresponding client and is used to receive instructions sent by the client and forward them to the control system.

7. The automatic transformer oil sampling device according to claim 6, characterized in that: The system comprises a photovoltaic panel and a storage battery. The photovoltaic panel converts solar energy into electrical energy and stores the electrical energy in the storage battery. The storage battery supplies power to the control system or the remote controller.

8. The transformer oil sampling automatic oil sampling device according to claim 1, characterized in that: A booster pump is connected in series between the transformer oil tank and the three-way valve.

9. The transformer oil sampling automatic oil sampling device according to claim 1, characterized in that: The waste oil barrel is provided with an immersion sensor on its inner wall, and the waste oil barrel is connected with an oil discharge pump.

10. The transformer oil automatic sampling device according to claim 1, characterized in that: A main valve is connected between the transformer oil tank and the three-way valve.

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