OF cable termination method

Abstract

To provide a terminal processing method of an OF cable, that surely prevents an oil leakage in an end part of the used OF cable, by realizing various implementation without using firearm in a state where the generation of an event that an insulation oil is leaked from the end part of the OF cable is prevented.SOLUTION: A terminal processing method of an OF cable, according to a present invention, is constructed by: a step of closing an oil path of the OF cable in an end part of the OF cable; and a step of mounting an oil-proof rubber cap in the end part of the OF cable. In the step of closing the oil path of the OF cable, means of hitting a truncated-cone wedge member made of the oil-proof rubber into the oil path is used. In the step of mounting the oil-proof rubber cap into the end part of the OF cable, means of winding an oil-proof tape to the OF cable, covering an open part of the cap to this oil-proof tape, and fastening a peripheral edge of the open part of the cap with a band is used. In addition, a metal cap is mounted to the cap to fix the oil-proof tape so as to be wound. Also, a tape with a high injury resistant is wound to the metal cap.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for terminating an oil-filled cable, which can reliably prevent oil leakage at the end of a used oil-filled cable. [Background technology]

[0002] Oil-filled cables, which are filled with insulating oil, are usually buried underground, and as the cables age, they are removed from the ground as appropriate.

[0003] The removal of these OF cables involves excavating several meters of ground to expose the OF cable, cutting and removing the exposed OF cable, and then filling the ground again, repeating this process to gradually remove the OF cable in the target section. In such OF cable removal work, there are cases where the OF cable is left partially underground in places where excavation is impossible, for example, because a building has been built on the excavation site.

[0004] In this case, before backfilling the ground, various temporary simple treatments and processes are applied to the ends of the cut OF cables to prevent oil leakage from the ends.

[0005] One method of final disposal and processing of the terminals of these OF cables that cannot be removed and are left behind is lead processing, which involves melting solder, a lead-tin alloy, over an open flame and forming the terminals.

[0006] However, lead removal is a specialized task that requires highly advanced skills, and in recent years, the number of technicians capable of performing this task has been decreasing. This has made it difficult to secure workers to remove OF cables. In addition, lead removal takes time, which limits the number of tasks that can be performed per day.

[0007] Furthermore, since lead processing involves melting solder with a burner or the like, it is necessary to ensure the safety of the site and workers, who use open flames.

[0008] Therefore, as a method for processing the end of an OF cable, a method of attaching a metal cap to the end as shown in Patent Document 1 and a method of attaching a cover member to the end as shown in Patent Document 2 have been proposed.

[0009] Specifically, the method shown in Patent Document 1 includes the steps of attaching a metal cap to the cut end, inserting a fusion material into the gap between the cut end and the metal cap, heating and melting the fusion material to watertightly join the cut end and the metal cap, and, after attaching the metal cap to the cut end, applying an external force to the outer periphery of the metal cap to deform the metal cap and thereby narrowing the gap at the point where the external force acts.

[0010] Furthermore, the method disclosed in Patent Document 2 includes a step of draining insulating oil from the OF cable, a compression step of compressing a compression fitting attached to one end of the OF cable and sealing the one end of the OF cable with the compression fitting, an attachment step of attaching a cover member to the one end of the OF cable to cover the compression fitting compressed in the compression step and form a space around the one end, and a filling step of filling a resin material into the cover member attached in the attachment step. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Patent No. 4613723 [Patent Document 2] Patent No. 6076836 Summary of the Invention [Problem to be solved by the invention]

[0012] However, the method in Patent Document 1 mentioned above is the same as conventional lead work using firearms, and the method in Patent Document 2 has led to problems such as the filler not functioning properly at the end of the OF cable, and even when a metal cap or cover member is attached, insulating oil gradually leaks from small gaps.

[0013] The reason for this is that, for reasons (1) and (2) below, construction work must be carried out in a state where insulating oil is constantly leaking from the end of the OF cable.

[0014] (1) Even if the insulating oil inside the OF cable is drained in advance, i.e., oil removal work is carried out, it is impossible to completely prevent the insulating oil from leaking out from the end of the OF cable at the site.

[0015] (2) If the end of the OF cable is located at the highest point on site, or at the lowest point where sufficient oil removal has been achieved in a steep downward slope pipeline installation with no upward slope, it is possible to prevent insulating oil from leaking from the end, but in reality, work is often carried out at sites where there are ups and downs along the way or where there is not much difference in elevation. When working at such sites, a certain amount of insulating oil is constantly leaking from the end of the OF cable.

[0016] Therefore, in order to solve the problems associated with the above-mentioned conventional technology, the present invention aims to provide a terminal processing method for an OF cable that prevents oil leakage at the end of a used OF cable by enabling various construction work to be performed while preventing insulating oil from leaking from the end of the OF cable. [Means for solving the problem]

[0017] The terminal processing method for OF cable of the present invention solves the above-mentioned problem by comprising the steps of closing the oil passage of the OF cable at the end of the OF cable and attaching an oil-resistant rubber cap to the end of the OF cable.

[0018] According to the present invention, work begins with the process of closing the oil passage of the OF cable, which makes it possible to carry out various subsequent construction work at the site while preventing the occurrence of a situation in which insulating oil leaks from the end of the OF cable.

[0019] In addition, by attaching an oil-resistant rubber cap to the end of the OF cable, even if insulating oil seeps out from a part other than the closed oil passage, the insulating oil can be reliably contained within the cap.

[0020] Furthermore, in the terminal processing method for OF cables according to the present invention, the step of closing the oil passage of the OF cable solves the above-mentioned problem by using a means for driving a truncated conical wedge member made of oil-resistant rubber into the oil passage.

[0021] This process closes the oil passages of the OF cable with the wedge, preventing the insulating oil from leaking out from the ends of the oil passages. In addition, by driving a truncated cone-shaped wedge into the oil passages, it becomes easy to close oil passages of various diameters.

[0022] In addition, in the case of an OF cable having a pipe-shaped shielding layer, if insulating oil leaks from the space between the cable core and the pipe-shaped shielding layer, the above-mentioned problem was solved by adding a process of filling the space with rags and an oil coagulant.

[0023] This process can stop the leakage of insulating oil from the space between the cable core and the pipe-shaped shielding layer.

[0024] In this way, by driving a wedge into the oil passage of the OF cable to close it, or by filling the space between the cable core and the pipe-shaped shielding layer with a rag and oil coagulant to seal the space, an oil-resistant rubber cap is attached to the end of the OF cable, which prevents insulating oil from leaking out from the end of a used OF cable. This also makes it possible to attach the rubber cap more securely.

[0025] In addition, the above-mentioned problems are solved by adding a step of wrapping a stainless steel band or the like around the OF cable to tighten the OF cable in the end processing method of the present invention.

[0026] This process also prevents the insulating oil from leaking out from areas other than the closed oil passages.

[0027] Specifically, when insulating oil is present in the space between the cable core and the pipe-shaped shielding layer and that space is sealed with a rag and oil coagulant, if the OF cable has a soft shielding layer, wrapping a stainless steel band or similar around the corrosion protection layer of the OF cable to tighten it prevents the insulating oil from seeping out from the rag and oil coagulant that are sealing the space. It can also prevent the insulating oil that has soaked into insulating paper, etc. from leaking.

[0028] In addition, the process of winding a stainless steel band or the like around the OF cable to tighten it involves winding a stainless steel band or the like around the shielding layer of the OF cable to tighten it, thereby solving the above-mentioned problem.

[0029] For example, if the OF cable has a hard shielding layer made of stainless steel or aluminum and insulating oil is seeping out from areas other than the oil passage, it is necessary to squeeze the hard shielding layer with greater force.

[0030] Therefore, in the case of an OF cable with a hard shielding layer, removing the corrosion protection layer of the OF cable and wrapping a stainless steel band or the like directly around the hard shielding layer can more reliably prevent the insulating oil from seeping out from the rag and oil coagulant. It can also more reliably prevent the leakage of insulating oil that has soaked into the insulating paper, etc.

[0031] Furthermore, in the terminal processing method for OF cable according to the present invention, the process of attaching an oil-resistant rubber cap to the end of the OF cable involves wrapping oil-resistant tape around the OF cable to a thickness that approximately matches the inner diameter of the cap's opening, aligning the cap's opening with this oil-resistant tape, and tightening the periphery of the cap's opening with a band at the position of the oil-resistant tape, thereby solving the above-mentioned problem.

[0032] This step allows the inner peripheral surface of the opening of the cap to be in contact with the oil-resistant tape at the end of the OF cable, the tape having a thickness that is approximately the same as the inner diameter of the opening of the cap. The band tightens around the edge of the cap opening, so the inner surface of the cap opening bites firmly into the oil-resistant tape, allowing the end of the OF cable to be completely sealed with the oil-resistant rubber cap.

[0033] Therefore, even if insulating oil seeps out from a portion other than the closed oil passage at the end of the OF cable, the insulating oil can be reliably contained within the cap.

[0034] Furthermore, because the oil-resistant rubber cap is securely fixed to the end of the OF cable, the top plate of this oil-resistant rubber cap also serves to hold down the wedge member driven into the oil passage so that it does not come out.

[0035] Furthermore, in the terminal processing method for OF cables according to the present invention, the above-mentioned problem is solved by adding a step of attaching a metal cap filled with an oil-resistant caulking agent to the oil-resistant rubber cap attached to the end of the OF cable, and wrapping oil-resistant tape around the periphery of the opening of the metal cap to secure it in place.

[0036] This process ensures that even if a small amount of insulating oil leaks from the oil-resistant rubber cap, the insulating oil will not leak out.

[0037] In addition, oil-resistant tape is wrapped around the periphery of the metal cap's opening to secure it in place, so the oil-resistant rubber cap will not deteriorate due to ultraviolet rays or be altered by groundwater.

[0038] This makes it possible to provide durability of more than 30 years, which is the lifespan of OF cable.

[0039] In addition, in the terminal processing method for OF cable according to the present invention, the above-mentioned problem is solved by adding a step of wrapping a damage-resistant tape around and fixing the metal cap attached to the end of the OF cable.

[0040] This process maintains the rigidity of the ends of the OF cable, and there is no risk of damage to the ends of the OF cable even if excavation work is carried out several years later. Also, there is no risk of damage to the ends even if a shovel or other tool is struck during excavation work.

[0041] Furthermore, in the terminal processing method for an OF cable according to the present invention, the above-mentioned problem is solved by adding a step of covering the damage-resistant tape wrapped around the end of the OF cable with a trough.

[0042] This process allows workers to become aware of the presence of the end of the OF cable before it is damaged, for example, if the cutting edge of a hydraulic shovel hits it during excavation work. [Effects of the Invention]

[0043] According to the method for treating an oil-filled cable end of the present invention, the work begins with the step of closing the oil passage of the oil-filled cable, so that subsequent work, such as covering the end of the oil-filled cable with an oil-resistant rubber cap, can be carried out in a state where insulating oil is prevented from leaking from the end of the oil-filled cable at the site. In addition, the protection provided by the metal cap placed on top of that makes it possible to reliably prevent oil leakage from the end of a used oil-filled cable for a long period of time.

[0044] In addition, when the oil passage of the OF cable is closed, a stainless steel band or the like is wrapped around the OF cable to tighten it, which prevents insulating oil from seeping out from areas other than the closed oil passage.

[0045] Furthermore, even if insulating oil seeps out from a portion other than the closed oil passage, the insulating oil can be reliably contained within the oil-resistant rubber cap. In addition, since a metal cap filled with an oil-resistant caulking agent is attached to the oil-resistant rubber cap, it is possible to reliably prevent the insulating oil from leaking outside the metal cap.

[0046] In addition, the durability of the end of the OF cable can be maintained by wrapping a damage-resistant tape around the metal cap or by covering it with a trough.

[0047] In addition, the method for treating an OF cable end according to the present invention has the effect of improving work safety and work efficiency because no open flame is used. [Brief explanation of the drawings]

[0048] [Figure 1] 1A to 1C are explanatory diagrams clearly illustrating each step in a terminal processing method for an OF cable. [Figure 2] FIG. 1 is a cross-sectional view of a three-core OF cable to be terminated. [Figure 3]FIG. 1 is a cross-sectional view of a single-core OF cable to be terminated. [Figure 4] 1 shows the process of closing the oil passage of an OF cable, where (a) is a perspective view showing the state before a wedge member is driven into the oil passage, (b) is a perspective view showing the state after the wedge member has been driven into the oil passage, and (c) is a perspective view showing the state after the rear end of the wedge member protruding from the oil passage is cut off. [Figure 5] The figures show the process of attaching a cap to the end of an OF cable. (d) is a perspective view showing the state before oil-resistant tape is wrapped around the end of the OF cable. (e) is a perspective view showing the state after oil-resistant tape has been wrapped around the end of the OF cable and the cap has been applied. (f) is a perspective view showing the state after a band has been fastened around the periphery of the opening of the cap. [Figure 6] This shows the process of fitting a metal cap to the end of an OF cable, where (g) is a perspective view showing the state in which the metal cap filled with oil-resistant caulking agent is being fitted to the cap, (h) is a perspective view showing the state before oil-resistant tape or the like is wrapped around the fitted metal cap, and (i) is a perspective view showing the state in which oil-resistant tape has been wrapped around the fitted metal cap. [Figure 7] The figure shows the process of wrapping tape around the end of an OF cable to secure it in place, and the process of covering it with a trough. (j) is a perspective view showing the end of the OF cable secured by wrapping a damage-resistant tape around it, and (k) is a perspective view showing the end of the OF cable covered with an inverted trough. [Figure 8] 1 is a perspective view showing a state in which a stainless steel band or the like is being wound around and tightened around the corrosion-resistant layer of a single-core OF cable in a process of winding a stainless steel band or the like around the OF cable. FIG. [Figure 9] This is a perspective view showing the state in which the corrosion-resistant layer of a single-core OF cable is stripped off and a stainless steel band or the like is wound around and tightened around a hard pipe-shaped shielding layer in the process of winding a stainless steel band or the like around an OF cable. DETAILED DESCRIPTION OF THE INVENTION

[0049] Hereinafter, a preferred embodiment of a method for processing a terminal of an OF cable will be described in detail with reference to the drawings.

[0050] As shown in Figure 1, the terminal processing method for an OF cable according to the present invention comprises the steps of: step A of closing the oil passage of the OF cable; step B of attaching an oil-resistant rubber cap to the end of the OF cable; step C of attaching a metal cap to the end of the OF cable; step D of wrapping tape around and fixing the end of the OF cable; and step E of covering the end of the OF cable with a trough.

[0051] Among the above steps, the most distinctive feature of the present invention is step A of closing the oil passage of the OF cable and step B of attaching an oil-resistant rubber cap to the end of the OF cable.

[0052] Both processes make it possible to carry out subsequent work on site without leaking insulating oil from the end of the OF cable. Also, even if insulating oil seeps out from a part other than the closed oil passage, the insulating oil can be reliably contained within the oil-resistant rubber cap.

[0053] The terminal processing method for an OF cable according to the present invention includes a step A for closing the oil passage of the OF cable. However, if insulating oil is leaking from a part other than the oil passage, as necessary, the following steps may be appropriately performed: a step a1 for stuffing an oil coagulant and a rag into a predetermined space in the OF cable, as shown in FIG. 1; and a step a2 for wrapping a stainless steel band around the OF cable and tightening it.

[0054] The types of OF cables 100 that can be subjected to terminal processing of the OF cable according to the present invention include, for example, a three-core OF cable 100 having three oil passages 101 as shown in Figure 2, and a single-core OF cable 100 having a single oil passage 101 as shown in Figure 3.

[0055] As shown in Fig. 2, three-core oil-filled cable 100 has three conductors 103 with insulating paper 102 arranged therearound, and three oil passages 101 arranged around them. Insulating paper 102 is arranged around conductor 103, forming cable core 109. Cable core 109 and oil passages 101, which exist in three locations, are enclosed in interposer paper 104, and shielding layer 105 and anticorrosion layer 106 are arranged on the outside of interposer paper 104.

[0056] As shown in Fig. 3, a single-core oil-filled cable 100 has an oil passage 101 at the center, around which a conductor 103 and insulating paper 102 are arranged to form a cable core 109. In addition, a shielding layer 105, a reinforcing band 107, and a corrosion-resistant layer 106 are arranged around the cable core 109.

[0057] 3, in the single-core OF cable 100, a predetermined space 110 exists between the cable core 109 and the shielding layer 105, which is a metal sheath, and insulating oil is also filled into this space 110. The shielding layer 105 is formed into a pipe shape using a stainless steel sheath, an aluminum sheath, or the like.

[0058] Any of the OF cables 100 can be subjected to the terminal processing of the present invention, but for convenience, the basic terminal processing steps A, B, C, D, etc. will be explained using a three-core OF cable 100 as an example, and the processing steps a1 and a2, which are performed as needed, will be explained using a single-core OF cable 100 as an example.

[0059] (Process for closing oil passages in oil-filled cables) In step A of closing the oil passage 101 of the OF-cable 100, a means of driving a truncated cone-shaped wedge member 1 into the oil passage 101 is used, as shown in FIGS. 4(a) and 4(b).

[0060] The truncated cone-shaped wedge member 1 has a predetermined length and is made of oil-resistant rubber such as vulcanized rubber.

[0061] Then, as shown in FIG. 4(b), the tip end side of the wedge member 1 is inserted into the oil passage 101 of the OF cable 100, and the rear end side of the wedge member 1 is driven in using a hammer 2 or the like.

[0062] Next, as shown in FIG. 4(c), the rear end portion of the wedge member 1 protruding from the oil passage 101 is cut to a desired length.

[0063] By the above-mentioned operation, the oil passage 101 of the OF cable 100 is closed by the wedge member 1. However, if insulating oil is leaking from a part of the OF cable 100 other than the oil passage 101, as necessary, as shown in FIG. 1, step a1 of stuffing an oil coagulant and a rag into a predetermined space of the OF cable 100, and step a2 of wrapping a stainless steel band around the OF cable and tightening it, may be carried out as appropriate.

[0064] (The process of packing oil coagulant and rags) Specifically, as shown in Figure 3, a certain space 110 exists between the cable core 109 and the shielding layer 105 of the single-core OF cable 100, and in the event that the insulating oil filled in this space 110 leaks out, an oil coagulant and a rag are stuffed into this space 110.

[0065] In the three-core OF cable 100, if a predetermined space 110 exists between the cable core 109 and the shielding layer 105, the space 110 may be filled with an oil coagulant and a rag.

[0066] (The process of wrapping and squeezing a stainless steel band) In the process a2 of wrapping a stainless steel band 10 or the like around and tightening this OF cable 100, for example, in the single-core OF cable 100 shown in Figure 3, an oil coagulant and a rag are stuffed into the space 110 between the cable core 109 and the shielding layer 105 to stop oil leakage. In order to reliably prevent this oil leakage, the stainless steel band 10 or the like is further wrapped around and tightened around the single-core OF cable 100 as shown in Figure 8.

[0067] Furthermore, in the case of a lead-sheathed cable with a soft shielding layer 105, when insulating oil is seeping out from areas other than the oil passage 101, it is advisable to wrap a stainless steel band 10 or the like around the corrosion-resistant layer 106 of the lead-sheathed cable to tighten it. In this case, if multiple stainless steel bands 10 or the like are wrapped around it, the tightening effect can be fully exerted.

[0068] Furthermore, in the single-core OF cable 100 shown in Figure 3, if the cable has a hard pipe-shaped shielding layer 105 made of stainless steel, aluminum, etc., and insulating oil is seeping out from parts other than the oil passage 101, it is necessary to squeeze the hard shielding layer 105 with greater force.

[0069] Therefore, in the case of an OF cable with a hard shielding layer 105, it is advisable to remove the corrosion-resistant layer 106 from the OF cable and wrap and tighten the stainless steel band 10 or the like directly around the shielding layer 105, as shown in Figure 9. The tightening of the stainless steel band 10 or the like can be done using, for example, a hydraulic tightening machine.

[0070] By process a2 of wrapping a stainless steel band 10 or the like around the above-mentioned OF cable 100 and tightening it, it is possible to prevent, as necessary, the leakage of insulating oil from parts other than the oil passage 101, such as the leakage of insulating oil filled in a predetermined space 110 existing between the cable core 109 and the shielding layer 105 of the single-core OF cable 100, or the leakage of insulating oil that has soaked into the insulating paper 102.

[0071] Also, in the three-core oil-filled cable 100, the seepage of insulating oil from portions other than the oil passage 101, such as leakage of insulating oil soaked into the insulating paper 102, is prevented as necessary.

[0072] (The process of attaching an oil-resistant rubber cap to the end of an OF cable) In step B of attaching an oil-resistant rubber cap 3 to the end of the OF cable 100, first, as shown in Figures 5(d) and (e), an oil-resistant tape 4 is wrapped around the OF cable 100 so that the thickness of the tape approximately matches the inner diameter of the opening of the cap 3.

[0073] 5(e) and 5(f), the opening of the oil-resistant rubber cap 3 is placed against the wrapped oil-resistant tape 4, and the periphery of the opening of the cap 3 is fastened with a band 5 at the position of the oil-resistant tape. As a result, the inner peripheral surface of the opening of the oil-resistant rubber cap 3 bites firmly into the oil-resistant tape 4, and the end of the oil-resistant cable 100 can be completely closed by the oil-resistant rubber cap 3.

[0074] The caps 3 are made of oil-resistant rubber such as vulcanized rubber. Since manufacturing a large number of oil-resistant rubber caps 3 to fit all sizes of OF cables 100 would increase costs, three to five different sizes of caps 3 are prepared, and the size is adjusted by adjusting the thickness of the oil-resistant tape 4 to be wrapped around them. A stainless steel band 10, for example, is used as the band 5 that tightens the periphery of the opening of the oil-resistant rubber cap 3.

[0075] The oil-resistant rubber cap 3 has the purpose of reliably retaining the insulating oil within the cap 3 and preventing it from leaking out if the insulating oil seeps out from any part other than the oil passage 101 closed by the wedge member 1. However, if it is expected that a large amount of insulating oil will seep out, it is advisable to wrap oil-resistant tape 4 around multiple points on the OF cable 100 and tighten the periphery of the opening of the oil-resistant rubber cap 3 with multiple bands 5.

[0076] Furthermore, when an oil-resistant rubber cap 3 is attached to the end of the OF cable 100, the rear end of the wedge member 1 protruding from the oil passage 101 is pressed down by the inner wall of the cap 3, which prevents the wedge member 1 driven into the oil passage 101 from falling out and more reliably prevents leakage of insulating oil.

[0077] Specifically, a hard plate made of metal or the like is provided on the inside of the top plate of the oil-resistant rubber cap 3, and this metal plate abuts against the wedge member 1, holding down the wedge member 1 that closes the oil passage 101 so that it does not come out.

[0078] (The process of attaching a metal cap to the end of an OF cable) In process C of fitting a metal cap 6 to an oil-resistant rubber cap 3 attached to the end of the OF cable 100, first, as shown in FIG. 6(g), the metal cap 6 filled with an oil-resistant caulking agent 7 is fitted to the oil-resistant rubber cap 3.

[0079] Then, as shown in FIG. 6(h)(i), oil-resistant tape 4 is wrapped around the periphery of the opening of metal cap 6 to fix metal cap 6 to cap 3.

[0080] (The process of wrapping tape around the end of the OF cable to secure it in place) Step D of wrapping and fixing a tape around the end of the OF cable 100 is a measure to fix the metal cap 6 with a self-fusing tape when the fixing of the metal cap 6 with the oil-resistant tape 4 is insufficient.

[0081] Specifically, as shown in Figures 6(i) to 7(j), a metal cap 6 attached to the end of an OF cable 100 is fixed by wrapping a silicone self-fusing tape (8) that is resistant to external damage and waterproof.

[0082] (The process of covering the end of the OF cable with a trough) In step E of covering the end of the OF cable 100 with a trough, as shown in FIG. 7(k), a trough 9 is placed upside down to cover the damage-resistant tape 8 wrapped around the end of the OF cable 100. [Industrial Applicability]

[0083] As described above, the terminal processing method for OF cables according to the present invention is useful as a terminal processing method for OF cables that still have insulating oil inside, and is particularly suitable for processing the terminals of OF cables that are buried and left underground. [Explanation of symbols]

[0084] A: Process for closing oil passages in oil-filled cables a1...The process of packing oil coagulant and rags a2: The process of wrapping and squeezing the stainless steel band B: The process of attaching an oil-resistant rubber cap to the end of the OF cable. C...The process of attaching a metal cap to the end of an OF cable. D: The process of wrapping tape around the end of the OF cable to secure it in place E...The process of covering the end of the OF cable with a trough 100...OF cable 101...Oil passage 102...insulating paper 103...conductor 104…Intervening paper 105...shielding layer 106...Corrosion protection layer 107...Reinforcement belt 109...Cable core 110…Space 1...Wedge member 2. Hammer 3...Oil-resistant rubber cap 4...Oil-resistant tape 5...Band 6...Metal cap 7...Oil-resistant caulking agent 8...Damage-resistant tape 9...Trough 10...Stainless steel band

Claims

1. A terminal processing method for an OF cable, comprising the steps of: closing an oil passage in the OF cable at the end of the OF cable; and attaching an oil-resistant rubber cap to the end of the OF cable.

2. 2. The method for treating an oil-filled cable end according to claim 1, wherein the step of closing the oil passage of the oil-filled cable uses a means for driving a truncated cone-shaped wedge member made of oil-resistant rubber into the oil passage.

3. 3. The method for treating an oil-filled cable end according to claim 1, further comprising the step of filling a space between a cable core and the pipe-shaped shielding layer with a rag and an oil coagulant when insulating oil leaks from the space between the cable core and the pipe-shaped shielding layer.

4. 4. The method for processing an end of an oil-filled cable according to claim 1, further comprising the step of wrapping a stainless steel band or the like around the oil-filled cable to tighten it.

5. 5. The method for processing an oil-filled cable end according to claim 4, wherein the step of winding a stainless steel band or the like around the oil-filled cable to tighten the cable comprises winding a stainless steel band or the like around the shielding layer of the oil-filled cable to tighten the cable.

6. 2. The method for terminal processing of an oil-filled cable according to claim 1, wherein the step of attaching an oil-resistant rubber cap to the end of the oil-filled cable involves wrapping oil-resistant tape around the oil-filled cable to a thickness that approximately matches the inner diameter of the opening of the cap, placing the opening of the cap against the oil-resistant tape, and tightening the periphery of the opening of the cap with a band at the position of the oil-resistant tape.

7. 10. The method for treating an oil-filled cable end according to claim 1, further comprising the step of attaching a metal cap filled with an oil-resistant caulking agent to an oil-resistant rubber cap attached to the end of the oil-filled cable, and wrapping and fixing an oil-resistant tape around the periphery of the opening of the metal cap.

8. 8. The method for processing an end of an oil-filled cable according to claim 7, further comprising the step of wrapping a damage-resistant tape around the metal cap attached to the end of the oil-filled cable to fix it in place.

9. 9. The method for processing an end of an oil-filled cable according to claim 8, further comprising the step of covering the damage-resistant tape wound around the end of the oil-filled cable with a trough.

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