Oil sampling can filling device and oil sampling can filling method

Abstract

To provide an oil sampling can filling device and an oil sampling can filling method capable of preventing residual air in an oil sampling can, regardless of a worker's skill level, and reducing a cost, labor, and time required for reanalysis.SOLUTION: A configuration of an oil sampling can filling device 100 is for sampling an insulation oil. An oil sampling can 200 is a can with a screw mouth. The oil sampling can filling device 100 includes a fixed jig 110 for holding the oil sampling can 200 at a predetermined angle, an oil sampling box 140 with an upper surface that is open and attached to a screw opening 210 of the oil sampling can 200, and a tube 150 that is inserted through an opening 144a of the oil sampling box 140 and the screw opening 210 of the oil sampling can to inject insulation oil up to a bottom surface 202 of the oil sampling can 200.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a filling device for an oil extracting can for extracting insulating oil, and a filling method for an oil extracting can using the same. [Background technology]

[0002] Electricity supplied from power plants operated by electric power companies is transmitted to consumers through substations. Transformers, circuit breakers, instrument transformers, etc. are connected to substations. These devices are also called oil-filled electrical equipment because they are filled with insulating oil such as silicon oil as an insulating material. In oil-filled electrical equipment, the enclosed insulating oil is sampled and subjected to gas analysis to diagnose the deterioration of the insulating oil over time. At this time, the insulating oil sample is collected in an oil collection can (oil collection container).

[0003] For example, Patent Document 1 discloses an "oil extracting can for an oil-filled instrument transformer, comprising an oil extracting can body for an oil-filled instrument transformer and an oil extracting can sealing cap for screwing onto the connection valve of the oil extracting can body to seal it." In the oil extracting can for an oil-filled instrument transformer of Patent Document 1, the oil extracting can sealing cap is composed of "a screwing part that screws onto the connection valve of the oil extracting can body, and a metal bellows part that is attached integrally to the screwing part and adjusts the amount of oil in the oil extracting can body." [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-199356 Summary of the Invention [Problem to be solved by the invention]

[0005] As mentioned above, if air gets into the oil sampling can when extracting insulating oil from an equipment container, the moisture in the air may cause abnormalities in the analysis results (reducing the reliability of the analysis results). If this happens, the insulating oil must be extracted again and reanalyzed, which wastes money, effort, and time.

[0006] However, in a typical oil extracting can as exemplified in Patent Document 1, air tends to remain in the upper part of the can. For this reason, if the worker who extracts the oil has a high level of skill, the insulating oil can be extracted without leaving any air in the can, but if the worker is inexperienced in the oil extracting work, air often remains inside the can. Therefore, there has been a demand for the development of a method for preventing air from remaining in the oil extracting can during oil extraction, regardless of the worker's level of skill.

[0007] In view of such problems, the present invention aims to provide an oil extraction canister filling device and an oil extraction canister filling device that can prevent air from remaining in the oil extraction canister regardless of the skill level of the operator, and that can reduce the cost, effort, and time required for reanalysis. [Means for solving the problem]

[0008] In order to solve the above problems, a typical configuration of the oil extraction can filling device of the present invention is a filling device for an oil extraction can for collecting insulating oil, wherein the oil extraction can is a can with a screw cap, and the filling device is characterized in that it comprises a fixing jig for holding the oil extraction can at a predetermined angle, an oil extraction bucket attached to the screw cap of the oil extraction can and having an open top, and a tube that is inserted through the opening of the oil extraction bucket and the screw cap of the oil extraction can to the bottom of the oil extraction can and for injecting insulating oil.

[0009] The predetermined angle of the fixture is preferably between 10 degrees and 35 degrees.

[0010] The tube may be provided with a marker that indicates the position of the screw top of the oil extractor when the tip of the tube reaches the bottom of the oil extractor.

[0011] The fixing jig preferably has a magnet for attracting the oil extractor.

[0012] The fixing jig preferably has a regulating guide that regulates the position of the screw opening of the oil extractor.

[0013] In order to solve the above problems, a typical configuration of the method for filling an oil collection can according to the present invention is a method for filling an oil collection can using the filling device described above to collect insulating oil in an oil collection can, which is characterized by the steps of attaching an oil collection can to the screw mouth of the oil collection can, fixing the oil collection can to a fixing jig and tilting the oil collection can at a predetermined angle, inserting a tube through the oil collection can from the screw mouth of the oil collection can to the bottom, injecting insulating oil into the oil collection can until it overflows into the oil collection can, removing the tube and removing the fixing jig to stand the oil collection can upright, closing the inner lid of the oil collection can in the oil in the oil collection can, removing the oil collection can from the oil collection can and closing the outer lid of the oil collection can. Effect of the Invention

[0014] According to the present invention, it is possible to provide an oil extraction canister filling device and an oil extraction canister filling device that can prevent air from remaining in the oil extraction canister regardless of the skill level of the operator, and that can reduce the cost, effort, and time required for reanalysis. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a diagram illustrating a filling device according to the present embodiment. [Diagram 2] FIG. [Diagram 3] FIG. 1 is a diagram illustrating an oil collection vessel. [Figure 4] FIG. 2 is a diagram illustrating a method for filling an oil extractor can according to the present embodiment. [Diagram 5] FIG. 2 is a diagram illustrating a method for filling an oil extractor can according to the present embodiment. [Figure 6] FIG. 2 is a diagram illustrating a method for filling an oil extractor can according to the present embodiment. [Figure 7] FIG. 13 is a diagram illustrating the results of a study on the inclination angle of an oil extractor. [Figure 8]FIG. 13 is a diagram illustrating another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific values ​​shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In this specification and drawings, elements having substantially the same functions and configurations are given the same reference numerals to avoid repeated explanations, and elements not directly related to the present invention are not shown.

[0017] (Full filling device 100) FIG. 1 is a diagram illustrating a filling device 100 according to this embodiment. As illustrated in FIG. 1, the oil extracting can 200 is a screw-top can having a screw top 210 on the upper surface 200a. In this embodiment, a square oil extracting can 200 is illustrated, but this is not limited to this. For example, even if the can has another shape, such as a cylindrical shape, the filling device 100 of this embodiment can be used when a screw-top can is used as the oil extracting can 200.

[0018] The oil sampling can filling device 100 shown in Fig. 1 is used when collecting insulating oil sealed in an oil-filled electrical device 10 such as a transformer into an oil sampling can 200. As shown in Fig. 1 and Fig. 2, the filling device 100 of this embodiment includes a fixing jig 110, an oil sampling vessel 140, and a tube 150. Note that the oil-filled electrical device 10 and the oil sampling can 200 themselves are not included in the filling device 100 of this embodiment.

[0019] Fig. 2 is a three-view diagram of the fixing jig 110. The fixing jig 110 shown in Fig. 1 and Fig. 2 is a jig that holds the oil extractor can 200 at a predetermined angle, and includes a holder 120 and a stand 130.

[0020] The holder 120 is a member that holds the oil extractor can 200, and is configured to include a back surface 122 and a band 124. The back surface 122 holds the side surface of the oil extractor can 200.

[0021] The band 124 is connected to the back surface 122 and forms a frame surrounding the oil extractor can 200. The band 124 is configured to be openable and closable by a hinge 126, and configured to be fixed by a snap lock 128. This makes it possible to effectively prevent the oil extractor can 200 from falling off the holder 120.

[0022] Furthermore, in the filling device 100 of this embodiment, a regulating guide 114 protruding above the oil extracting can 200 is provided on the upper edge 122c of the back surface 122 of the fixing jig 110. As a result, when the oil extracting can 200 is placed inside the back surface 122, if the orientation of the oil extracting can 200 is incorrect, the regulating guide 114 will interfere with the screw mouth 210. In other words, the position of the screw mouth 210 of the oil extracting can 200 is regulated by the regulating guide. Therefore, it is possible to prevent human error when placing the oil extracting can 200 on the holder 120.

[0023] The stand 130 is a member that supports the holder 120 and thus the oil extractor can 200 attached thereto in a state inclined at a predetermined angle θ (10 degrees to 35 degrees as described later), and is configured to include a top plate 132 and a pair of legs 134. The top plate 132 is a plate-like member having a notch 132a. In other words, the top plate 132 has a concave shape when viewed from above.

[0024] The back surface 122 is fixed by welding to the notch 132a of the top plate 132 in a state of being inclined at a predetermined angle θ. A pair of legs 134 are fixed to the lower surface of the top plate 132 on both sides of the notch 132a by screws 138. This allows the top plate 132 with the holder 120 attached to be placed on a bat 160 or the ground (not shown) by the legs 134.

[0025] As shown in Fig. 1, this embodiment illustrates a configuration in which the filling device 100 is fitted into a vat 160 and legs 134 are placed on the bottom surface 160a of the vat 160. With this configuration, insulating oil that has flowed around the filling device 100 and the oil extractor can 200 can be received by the vat 160. This makes it possible to effectively prevent contamination of the surroundings of the work site by the insulating oil. In addition, by using a punched metal for the top plate 132, insulating oil that has flowed down onto the top plate 132 can be efficiently discharged into the vat 160.

[0026] Furthermore, by aligning the dimensions of the top plate 132 with the dimensions of the opening of the vat 160, it is possible to suitably prevent the filling device 100 from shifting in position within the vat 160. Note that, although the configuration in which the legs 134 are fixed to the top plate 132 has been exemplified in this embodiment, the present invention is not limited to this. For example, the legs 134 may be attached to the holder 120 (specifically, the back surface 122 of the holder 120), and the top plate 132 may not be used.

[0027] Furthermore, in this embodiment, the holder 120 and the top plate 132 are fixed by welding, and the top plate 132 and the pair of legs 134 are fixed by the screws 138, but the present invention is not limited to this. In either case, other known methods can be used.

[0028] Fig. 3 is a diagram illustrating the oil extraction vessel 140. For ease of understanding, Fig. 3(a) illustrates the oil extraction vessel 200 together with a two-sided view of the oil extraction vessel 140. Fig. 3(b) is a perspective view of the oil extraction vessel 140. As shown in Fig. 3(a), the oil extraction vessel 140 includes a cylindrical portion 142, a bottom portion 144, and an attachment port 146.

[0029] The cylindrical portion 142 has an open top surface, and the bottom surface is formed by the bottom portion 144. An opening 144a is formed in the bottom portion 144, and an attachment port 146 is attached to the opening 144a. The attachment port 146 is formed with a screw, and can be screwed into the screw port 210 of the oil extractor can 200 described above. This allows the oil extractor can 140 to be attached to the screw port 210 of the oil extractor can 200.

[0030] 3(b), a reference line 148 is provided on the inner surface of the cylindrical portion 142. By working so as to fill the insulating oil up to this reference line, it is possible to prevent human error resulting in a shortage of insulating oil.

[0031] The tube 150 is a member that injects the insulating oil discharged from the discharge port 14 of the valve 12 of the oil-filled electrical device 10 into the oil extractor can 200. One end of the tube 150 is attached to the discharge port 14. The other end of the tube 150 is inserted through the opening (attachment port 146) of the oil extractor bucket 140 and the screw port 210 of the oil extractor can 200, and is arranged to reach the bottom surface 202 of the oil extractor can 200 (see FIG. 4).

[0032] A hard (metallic) pipe 152 is attached to the tip of the tube 150. Since it is possible to know by sound and touch that the pipe 152 has reached the bottom of the oil extractor 200, it is possible to position the tube 150 so that it reliably reaches the bottom surface 202 of the oil extractor 200. Therefore, it is possible to prevent human error when inserting the tube 150.

[0033] (How to fill an oil tank) Figures 4, 5 and 6 are diagrams for explaining the method for filling the oil extracting can 200 according to this embodiment. Hereinafter, with reference to Figures 4 to 6, a method for collecting insulating oil from the oil-filled electrical device 10 in the oil extracting can 200 using the filling device 100 shown in Figure 1 will be explained. Note that the inside of the oil extracting can 200 is shown in a see-through view as appropriate to facilitate understanding.

[0034] In the method for filling the oil extractor can of this embodiment, first, as shown in Fig. 4(a), the attachment port 146 of the oil extractor bucket 140 is attached to the screw port 210 of the oil extractor can 200. Next, as shown in Fig. 4(b), the oil extractor can 200 is fixed to the fixing jig 110 arranged in the vat 160. As a result, the oil extractor can 200 is inclined at a predetermined angle θ in the vat 160.

[0035] At this time, the predetermined angle θ (tilt angle) of the oil extractor 200 is preferably 10 degrees to 35 degrees. In other words, the fixing jig 110 preferably holds the oil extractor 200 at an inclination of 10 degrees to 35 degrees. This is because if the inclination angle θ of the oil extractor 200 is less than 10 degrees, a large amount of air remains inside the oil extractor 200, and if the inclination angle θ of the oil extractor 200 exceeds 35 degrees, the amount of insulating oil that accumulates in the oil extractor 140 increases, and the insulating oil overflows from the oil extractor 140.

[0036] 4(c), the tube 150 and the pipe 152 are inserted through the oil sampling vessel 140 (the attachment port 146) from the screw port 210 of the oil sampling vessel 200 to the bottom surface 202. At this time, the user can hear and feel that the pipe 152 has reached the bottom of the oil sampling vessel 200.

[0037] After inserting the tube 150, inject the insulating oil 20 into the oil extractor 200 until the insulating oil 20 exceeds the reference line 148 as shown in Figure 5 (a). At this point, the air in the oil extractor 200 is almost entirely replaced by the injected insulating oil 20, but in rare cases, a small amount of air 16 may remain in the upper corners of the oil extractor 200.

[0038] Therefore, as shown in Fig. 5(b), the tube 150 is removed, the fixing jig 110 is removed, and the oil extractor 200 is set upright, and then the side surface 200b of the oil extractor 200 is pressed multiple times (for example, five times) as shown in Fig. 5(c). This allows the air 16 remaining in the upper corners of the oil extractor 200 to be moved (air bleed), and the air can be discharged from the oil extractor 200 to the oil extractor bucket 140.

[0039] After the air has been removed, as shown in Fig. 6(a), the inner lid 212 of the screw top 210 of the oil extractor can 200 is closed in the insulating oil stored in the oil extractor can 140. Then, as shown in Fig. 6(b), the oil extractor can 140 is removed from the oil extractor can 200, and the outer lid 214 of the screw top 210 of the oil extractor can 200 is closed as shown in Fig. 6(c).

[0040] As described above, according to the filling device 100 of the present embodiment and the filling method using the same, the inclination angle of the oil extractor 200 and the insertion position of the tube 150 can be fixed to prevent air from remaining during oil extraction. This makes it possible to prevent air from remaining in the oil extractor 200 regardless of the experience or sense of the operator, i.e., the level of skill. Therefore, it is possible to reduce the number of reanalyses due to air remaining in the oil extractor 200, and thus the costs, labor, and time required for the reanalysis.

[0041] 7 is a diagram for explaining the results of the study of the inclination angle of the oil extractor 200. In the study of the inclination angle, the amount of remaining air 16 in the oil extractor 200 and the amount of insulating oil 20 in the oil extractor 140 were visually confirmed when the oil extractor 200 was inclined at a predetermined angle and when the oil extractor 200 was inclined from the predetermined angle to 0 degrees.

[0042] As shown in Fig. 7, when the inclination angle of the oil extractor 200 is 0 degrees, that is, when the oil extractor 200 is not inclined, the amount of air 16 remaining in the oil extractor 200 is large (large), and the amount of insulating oil 20 in the oil extractor 140 is small (small). Therefore, the air in the oil extractor 200 is not sufficiently removed.

[0043] When the inclination angle of the oil extractor 200 is 10 degrees, 15 degrees, or 30 degrees, the amount of air 16 remaining in the oil extractor 200 when tilted is small (small), and when it is 0 degrees, the amount of air 16 remaining in the oil extractor 200 is small. Therefore, by performing the above-mentioned air bleeding, a small amount of air 16 can be discharged from the oil extractor 200. Note that when the inclination angle of the oil extractor 200 is 10 degrees, 15 degrees, or 30 degrees, the amount of insulating oil 20 in the oil extractor 140 is larger (medium to large) than when the inclination angle of the oil extractor 200 is 0 degrees.

[0044] When the inclination angle of the oil extractor 200 is 35 degrees, the amount of air 16 remaining in the oil extractor 200 is large (large), but when the inclination angle is 0 degrees, the amount of air 16 remaining in the oil extractor 200 is small (small). And, by the above-mentioned air bleeding, it was possible to discharge the air 16 in the oil extractor 200 into the oil extracting bucket 140. At this time, the amount of insulating oil 20 in the oil extracting bucket 140 was large.

[0045] When the inclination angle of the oil extracting can 200 is 45 degrees, the amount of remaining air 16 in the oil extracting can 200 is large (large), and even when the inclination angle is 0 degrees, the amount of remaining air 16 in the oil extracting can 200 remains large. Also, when the inclination angle of the oil extracting can 200 is 45 degrees, the amount of insulating oil flowing into the oil extracting pot 140 increases, and the insulating oil 20 sometimes overflows from the oil extracting pot 140. To prevent this, the oil extracting pot 140 can be made deeper, but this makes it difficult to close the inner lid 212. From these facts, it can be seen that the inclination angle of the oil extracting can 200 is preferably in the range of 10 degrees to 35 degrees.

[0046] Fig. 8 is a diagram for explaining another embodiment. The same reference numerals are used for parts that overlap with the above embodiment, and the explanation is omitted. In the fixing jig 110A shown in Fig. 8, a magnet 112 is provided on the back surface 122 of the holder 120. As a result, the oil extractor can 200 is attracted to the magnet 112, so that the oil extractor can 200 can be suitably prevented from shaking or wobbling in the holder 120. When the magnet 112 is provided on the back surface 122, the band 124 and the snap lock 128 for connecting the band 124 may not be provided.

[0047] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above-described embodiment. It is clear that a person skilled in the art can think of various modifications or alterations within the scope of the claims, and it is understood that these also naturally belong to the technical scope of the present invention. [Industrial Applicability]

[0048] INDUSTRIAL APPLICABILITY The present invention can be used as a filling device for an oil extracting can for extracting insulating oil, and as a filling method for an oil extracting can using the same. [Explanation of symbols]

[0049] 10...oil-filled electrical equipment, 14...discharge port, 16...air, 20...insulating oil, 100...filling device, 110...fixing jig, 112...magnet, 114...regulating guide, 120...holder, 122...back, 124...band, 126...hinge, 128...snap lock, 130...stand, 132...top plate, 132a...notch, 134...leg, 138...screw, 140...oil sampling vessel, 142...cylindrical portion, 144...bottom, 144a...opening, 146...mounting port, 150...tube, 152...pipe, 160...bat, 160a...bottom, 200...oil sampling vessel, 200a...top, 200b...side, 202...bottom, 210...screw port, 212...inner lid, 214...outer lid

Claims

1. An oil sampling tank filling device for collecting insulating oil, The oil extractor is a screw-top can, The filling device is A fixture that holds the oil extractor at a predetermined angle; An oil sampling vessel having an open top and attached to the screw port of the oil sampling vessel; a tube that is inserted through the opening of the oil sampling vessel and the screw port of the oil sampling can to the bottom surface of the oil sampling can and injects the insulating oil; An oil sampling tank filling device comprising:

2. 2. The filling device according to claim 1, wherein the predetermined angle of the fixing jig is between 10 degrees and 35 degrees.

3. An oil sampling can filling device as described in claim 1 or claim 2, characterized in that the tube is provided with a marker that indicates the position of the screw opening of the oil sampling can when the tip of the tube reaches the bottom of the oil sampling can.

4. 4. The oil sampling can filling device according to claim 1, wherein the fixing jig has a magnet for attracting the oil sampling can.

5. 5. An oil sampling canister filling device as described in claim 1, wherein the fixing jig has a regulating guide that regulates the position of the screw opening of the oil sampling canister.

6. A method for filling an oil sampling can by using the filling device according to claim 1 to collect insulating oil in an oil sampling can, Attach the oil sampling vessel to the screw opening of the oil sampling can, The oil extractor is fixed to the fixing jig and inclined at a predetermined angle, The tube is inserted through the oil sampling vessel from the screw opening of the oil sampling vessel to the bottom surface, The insulating oil is poured into the oil tank until the oil tank overflows, Remove the tube, remove the fixture, and stand the oil extractor upright; The inner lid of the oil extracting can is closed in the oil of the oil extracting vessel, A method for filling an oil extracting can, comprising removing the oil extracting bucket from the oil extracting can and closing an outer lid of the oil extracting can.

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