JP2012209120A - Oil leakage countermeasure device of oil-filled apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil leakage countermeasure device capable of quickly and easily preventing oil leakage and spread thereof without replacing a deteriorated packing with a new one in a case where the oil leakage occurs from a seal portion such as an inspection port and a flange of an oil-filled electrical apparatus.SOLUTION: In a case where oil leakage from a gap between an inspection port disposed on a tank wall of an oil-filled apparatus and a cover thereof or from a piping connection portion occurs, an oil leakage countermeasure device according to the present invention covers the cover of the inspection port or the piping connection portion, imparts sealability to a seal member by tightly pressing the seal member disposed outside the cover so as to surround the cover against the tank wall and prevents the oil leakage from portions described above and spread thereof.

Description

  The present invention relates to an oil leakage countermeasure device used for oil leakage countermeasures from a manhole at an inspection port of an oil-filled device, a pipe connection portion connected to the device, or the like.

  Oil-filled equipment such as transformers often used as electric power facilities are usually provided with a circular inspection port penetrating in the thickness direction on the tank wall and closed by a disk-shaped lid. Also, piping is often connected to the tank wall of imported equipment via a piping connection. And as a countermeasure against oil leakage, a seal member such as packing is usually provided between the peripheral portion of the inspection port and the peripheral portion of the lower surface of the lid or between the flanges.

  Fig.5 (a) is the figure which showed the cross section of the state with the lid | cover in the case of the inspection port provided in the oil-filled equipment tank. As shown in this figure, an inspection port 33 penetrating in the thickness direction is formed in the peripheral wall of the tank 31. A packing groove 31a is provided substantially concentrically with the inspection port 33 at a peripheral edge portion of the inspection port 33, and a packing 34 having a substantially spherical cross section is fitted therein. On the outer side of the packing groove 31a, bolt holes 31b, 31b,... Are arranged at equal intervals on a circumference substantially concentric therewith. Through holes 35a, 35a,... Are formed in positions corresponding to the bolt holes 31b, 31b,... In the circumferential direction near the periphery of the disk-shaped lid 35 that covers the inspection port 33. Yes. The lid 35 is fixed to the tank wall 31 by screwing and tightening bolts 36, 36,... Inserted through the through holes 35a, 35a,. Has been. The lid 35 is in a state where its lower surface is crimped to a packing 34 arranged concentrically with the opening of the inspection port 33, and the insulating oil 32 inside the tank 31 leaks from the gap between the tank 31 device wall and the lid 35. It is suppressed.

  However, since the packings deteriorate over time, oil often leaks from the inspection port cover or the pipe connection part over time. As a countermeasure against this oil leakage, it is necessary to replace the used packings with new ones. For this reason, the insulating oil in the oil-filled equipment tank must be removed. It is necessary to let This reduces the reliability of power supply and leads to a significant cost increase.

  In addition, in the event that a power outage or cost cannot be applied over a long period of time, as shown in FIG. 5 (b), emergency measures are taken to suppress oil leakage from the inspection port lid and flange with caulking material (same figure, reference numeral 37). May be applied. When such emergency measures are taken, the caking material solidified material must be peeled off and removed when the packing is replaced in the future, which increases the labor of the operator.

  Several proposals have been made for devices and methods for preventing leakage of contents from an inspection port of an equipment tank and a pipe connection, not limited to electric power equipment. For example, Patent Document 1 proposes a high-temperature gasket formed as a double ring having a different diameter. However, even if it can be expected that the time until leakage can be extended by structurally making a double ring, the double ring is crimped between different parts of a member such as a flange. There is a possibility that oil leakage may occur due to a problem in the method, etc. In addition, it is expected that packing replacement will eventually lead to a long-term power outage and cost increase as described above.

Japanese Patent Application No. 4-307378

  In view of the above circumstances, the present invention provides a method for quickly and easily leaking and diffusing oil without replacing deteriorated packings when oil leaks from a sealing portion such as an inspection port or a flange of an oil-filled electrical device. An object of the present invention is to provide an oil leakage countermeasure device that can prevent the occurrence of oil leakage.

According to the present invention, the object is achieved by an oil leakage countermeasure device shown in the following (1) to (3).
(1) An oil leakage countermeasure device used to prevent oil leakage and diffusion from a gap between an inspection port provided on a tank wall of an oil-filled device and a lid thereof, on the tank wall surface An oil leakage countermeasure device for oil-filled equipment, comprising an apparatus main body configured to cover and conceal a cover of an inspection port and to be capable of being crimped to the tank wall surface with a seal member disposed so as to surround the cover on the outside of the cover (2) The apparatus main body is a plate-like body having a larger area than the outer surface of the lid, and a concave portion for accommodating the lid is formed in the central region of one surface, and the peripheral region thereof is the tank wall surface. Further, the contact surface is provided with a groove that can be accommodated so that the seal member surrounds the recess and slightly protrudes from the contact surface over the entire circumference. Oil leakage countermeasure device described in (1)
(3) The apparatus main body has bolt insertion holes at regular intervals in the circumferential direction on the contact surface, and bolt holes are formed at positions corresponding to the bolt holes on the tank wall surface. The oil leakage countermeasure according to (1) or (2) above, wherein the bolt hole and the bolt insertion hole are aligned and the bolt is inserted and screwed to be fixed to the tank wall surface. apparatus.

Moreover, according to another situation of this invention, the said objective is achieved by the oil leak countermeasure apparatus shown to the following (4)-(7).
(4) An oil leakage countermeasure device used for preventing oil leakage from a connecting portion of a pipe connected to a tank wall of an oil-filled device and diffusion thereof, on the tank wall surface, outward from the connecting portion An apparatus main body configured to cover and conceal the connection portion in close contact with the outer periphery of the pipe projecting to the outside, and to be configured to be able to be crimped to the tank wall surface on the outside of the connection portion. An oil leakage countermeasure device for oil-filled equipment.
(5) The apparatus body is a plate-like body that has a larger area than the outer surface of the connection portion and can be separated into two so as to sandwich the pipe, and one of the plate-like bodies A concave portion capable of accommodating the connecting portion in a central region of the surface, and a through hole through which the pipe is inserted in the central region of the concave portion, and a peripheral region formed on a contact surface that contacts the tank wall surface; Further, the oil leakage countermeasure device according to (4), wherein the contact surface is provided with a groove that can be accommodated so that the seal member surrounds the recess and protrudes slightly from the contact surface over the entire circumference. .
(6) The oil leakage countermeasure device according to (5), wherein a groove is provided on an inner periphery of the through hole, and a second seal member is fitted in the entire periphery of the pipe.
(7) The apparatus body has bolt insertion holes formed at regular intervals in the circumferential direction on the contact surface, and bolt holes are formed at positions corresponding to the bolt holes on the tank wall surface. In any one of the above (4) to (6), the bolt hole and the bolt insertion hole are aligned and the bolt is inserted and screwed to be fixed to the tank wall surface. Oil leakage countermeasure device as described.

  Each of the oil leakage countermeasure devices of (1) to (7) above does not require any special fixing method for fixing it to the tank wall in a crimped state, for example, tightening with bolts, fastening with bolts and nuts, etc. It can fix to a tank wall using a conventionally well-known fixing method.

  According to the present invention, it is configured to completely cover the existing inspection port lid and flange of the device and further seal the outside of the inspection port lid and flange. Therefore, even when oil leakage occurs from the existing seal part, the device deteriorated. Oil leakage and its diffusion can be prevented quickly and easily without changing packings. Also, even if oil leakage occurs due to deterioration of the sealing performance due to deterioration of the seal member of the oil leakage countermeasure device of the present invention, it is possible to permanently leak by repeating new and old replacement of the oil leakage countermeasure device of the present invention. Oil and its diffusion can be prevented. This eliminates the need to open the inspection port lid and flange, thereby eliminating short-term power outages and reducing costs.

It is a figure which shows an example of embodiment of the oil leakage countermeasure apparatus of this invention. It is a figure for demonstrating the attachment method and attachment state of embodiment shown in FIG. It is a figure which shows another example of embodiment of the oil leak countermeasure apparatus of this invention. It is side surface sectional drawing for demonstrating the attachment state of embodiment shown in FIG. It is a figure for demonstrating the emergency measure in the case of the leakage of the content from the conventional attachment state of the inspection port cover and the said inspection port.

  Next, embodiments of the oil leakage countermeasure device of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited to the following embodiments. In the following description, the terms “upper (surface)” or “lower (surface)” refer to upward or downward as viewed in the drawings, respectively.

  FIG. 1 is an example of an embodiment of the present invention, and an oil leakage countermeasure device used for oil leakage countermeasures between an inspection port provided directly on the tank wall of the oil-filled device shown in FIG. 5 and its lid. (A) is the top view, (b) is an AA arrow directional view. In the embodiment shown in this figure, the oil leakage countermeasure device 1 of the present invention is arranged in a disc-like device body 10 having a larger area than the outer surface of the inspection port, and at a constant interval in the circumferential direction near the outer periphery thereof. The bolts 14, 14, 14,... Inserted through the bolt holes 10 a, 10 a, 10 a,.

  On the lower surface of the apparatus main body 10, a lid accommodating portion 11 having a size substantially the same as the lid of the inspection port (see reference numeral 35 in FIG. 5) is formed concentrically with the apparatus main body 10. Bolts capable of accommodating the heads of bolts (FIG. 5, reference numerals 36, 36,...) For fixing the lid 35 near the inner peripheral surface 10d of the apparatus main body 10 facing the lid accommodating portion 11. .. Are provided at regular intervals in the circumferential direction. The inner surface that defines the lid accommodating portion 11 and the bolt head accommodating portions 12, 12,... May be designed to be in close contact with the outer surface of the lid 35 and the head of each bolt 14, and is designed not to adhere. You can also

  Further, on the lower surface of the apparatus main body 10, the outside of the lid housing portion 11 is a contact surface 10 e that can contact the tank wall surface. Bolt holes 10a, 10a, 10a,... Are provided at regular intervals in the circumferential direction in a substantially central region in the width direction of the contact surface 10e. The size of each bolt hole can be appropriately determined in consideration of the shaft diameter of the bolt inserted into the bolt hole. Further, a groove 10b in which the seal member 15 can be fitted over the entire circumference is provided so as to surround the lid accommodating portion 11. The width of the groove 10b is set to such an extent that the seal member 15 can be accommodated, and the depth of the groove 10b is slightly protruded from the contact surface over the entire circumference.

  As the seal member 15, conventionally known ones such as various O-rings, seal packings, oil seals, and the like can be used. The O-ring and seal packing can be formed of various conventionally known rubber materials. Specific examples of such rubber materials include nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), fluorine rubber (FKM), silicone rubber (VMQ), ethylene propylene rubber (EPDM), chloroprene rubber (CR), Acrylic rubber (ACM), butyl rubber (IIR), urethane rubber (U) and the like can be mentioned, and can be appropriately selected from these according to the characteristics of each material.

  Next, with reference to FIG. 2, the usage method of the oil leakage countermeasure apparatus of this embodiment is demonstrated. In the case of the oil leakage countermeasure device 1 according to the present embodiment, when this device is attached, it is placed on the outside of the lid of the tank wall inspection port at a position corresponding to the bolt holes 10a, 10a, 10a,. Bolt holes 31b, 31b, 31b,... Are provided respectively. Each bolt hole 31 b is formed to a depth that does not penetrate the tank wall 31. If necessary, blind bolts 17 can be screwed into the respective bolt holes 31b as shown in FIG. 2, but when installing the oil leakage countermeasure device 1 according to the present embodiment, The blind bolts 17, 17, 17,... Are removed (see FIG. 2B).

  Thereafter, the oil leakage countermeasure device 1 of the present embodiment is put on the lid 35. At that time, the oil leakage countermeasure device 1 of the present embodiment is rotated clockwise or counterclockwise, and the heads of the bolts 36, 36, 36,... It accommodates in the bolt head accommodating part 12, 12, 12, ... of an oil countermeasure device. Next, the bolts 14, 14, 14,... Are inserted and screwed into the bolt holes 10a, 10a, 10a,. The bolts 14 are preferably tightened according to a conventionally known method so that the apparatus main body 10 is not deformed such as torsion. Thus, the oil leakage countermeasure device 1 of the present embodiment is fixed to the tank wall surface 31 in a state where the seal member 15 is crimped to the tank wall surface 31, so that the head of the lid 35 and each bolt 36 protruding therefrom. The oil leakage countermeasure device 1 of the present embodiment is fixed to the tank wall surface in a state in which it is substantially in close contact with each surface of the section and the sealing member 15 is crimped to the tank wall surface 31 (see FIG. 2C). Thus, the oil leakage countermeasure device 1 according to the present embodiment contributes to prevention of oil leakage from the gap between the inspection port directly provided on the tank wall surface 31 and the lid and diffusion thereof.

  FIG. 3 shows, as another example of the embodiment of the present invention, an oil leakage countermeasure device used for oil leakage countermeasures from a pipe connection portion provided on a tank wall surface, (a) is a plan view thereof, b) is a side view seen from a direction perpendicular to the dividing plane, and (c) is a side view seen from a direction parallel to the dividing plane. As shown in this figure, the oil leakage countermeasure device 2 of the present embodiment includes a device main body 20 composed of plane-shaped substantially sector-shaped halves 201 and 202 each having a mirror image relationship. Each of the halves 201 and 202 has joint surfaces 201a and 202a that are joined to each other, and a semicircular cut is formed in a portion corresponding to the center of the fan shape that is the outer shape of each of the halves 201 and 202. 251 and 252 are formed, so that the joint surfaces 201a and 202a are joined to each other so that the disk-shaped device main body 20 having the through hole 25 penetrating in the thickness direction in the central region is formed. It has become.

  On the lower surface of the apparatus main body 20 (each halved body part 201, 202), a pipe connection part accommodating part 23 and a bolt head part accommodating part for accommodating a pipe connection part and a bolt head for fixing the pipe connection part to the tank wall surface. 24, 24,... Are provided. In addition, grooves 20b and 20b are provided in a semicircular shape concentrically on the outer surface of the concave portion of the pipe connection portion 23 on the lower surface of each of the half-split portions 201 and 20, and the entire device body 20 has a circular shape. Is formed. In the grooves 20b and 20b, seal members 26 and 26 are fitted in a state of projecting over the entire length of the semicircular groove. At the joints of the halves 201 and 202, both end portions can be processed by a known joining method so that the seal members 26 and 26 overlap each other in the direction in which they are subjected to pressure bonding. As a specific example of such joining, it is possible to employ a method in which both end portions are cut obliquely with respect to the length direction and joined so that the oblique cut surfaces are aligned with each other.

  The halved cylindrical body portions 211 and 212 are provided upright from the peripheral portions of the cuts 251 and 252, respectively. Projection pieces 22, 22, 22, 22 are provided on both sides of the half cylinders 211, 212 on both sides in a direction perpendicular to the standing direction so as to be flush with the contact surfaces. Bolt insertion holes 22a, 22a, 22a, and 22a are formed in the center region. In addition, grooves 211a and 212a are respectively provided in the circumferential direction substantially in the middle of the longitudinal direction of the half cylinder portions 211 and 212, and the grooves 211a and 212a have a semicircular shape over the entire length thereof. The sealing members 27 and 27 divided into two are housed in a state protruding from the inner peripheral surface. At the joint portions of the half cylinder portions 211 and 212, both end portions can be processed by a known joining method so that the seal members 27 and 27 overlap each other in the direction in which they are subjected to pressure bonding. As a specific example of such joining, it is possible to employ a method in which both end portions are cut obliquely with respect to the length direction and joined so that the oblique cut surfaces are aligned with each other.

  In the present embodiment, the configuration other than the above-described two-divided configuration of the apparatus main body (half portion, seal member, and half cylinder portion) is essentially the same as the above embodiment.

  Next, the usage method of the oil leakage countermeasure apparatus of this embodiment is demonstrated. Even when this embodiment is used for a pipe connection portion, bolt holes are provided in advance at regular intervals in the circumferential direction outside the observation connection portion. If necessary, blind bolts are screwed into these bolt holes, and the blind bolts are removed when attaching the oil leakage countermeasure device 2 of this embodiment, as in the above embodiment.

  FIG. 4 is a cross-sectional view of the metal surface showing the mounting state of the oil leakage countermeasure device of the present embodiment. The halved parts 201 and 202 obtained by separating the apparatus main body 20 of the oil leakage countermeasure apparatus 2 of the present embodiment into two parts are joined so as to wrap the pipe projecting from the pipe connection part from both sides. At that time, the halves 201 and 202 are slightly rotated around the axis of the pipe, and the heads of the bolts fixing the pipe connection portions are bolt head housing parts 12, 12, 12, To be housed in ...

  Then, the bolts 291 and 291 are respectively inserted into the bolt insertion holes 22a and 22a; 22a and 22a of the projecting pieces 22 and 22; By fastening 292, these half cylinder parts 211 and 212 are joined and fixed. After that, the bolts 14, 14, 14,... Are inserted into the bolt insertion holes 10a, 10a,. As a result, the apparatus main body 20 is fixed to the tank wall surface. At this time, the seal member 15 partially protruding from the lower surface of the apparatus main body 20 (see FIGS. 3B and 3C) has a tank. It is pressure-bonded to the wall surface 31 and fulfills a sealing function, thereby preventing oil leakage and its diffusion.

  As described above, even when oil leakage is observed at the inspection port or pipe connection provided on the tank wall surface of the oil-filled equipment, the oil leakage countermeasure device tank wall surface of the present invention can be applied to the tank wall surface by a known method. By fixing the seal member arranged so as to surround the lid of the inspection port and the pipe connection part in a state where it is crimped to the tank wall surface, the oil leakage and its Diffusion can be prevented. In addition, the seal of the member of the oil leakage countermeasure device of the present invention decreases with time, and even if oil leakage from this is recognized, by repeating the replacement of only the oil leakage countermeasure device of the present invention, Permanent prevention of oil leakage is achieved. In addition, the oil leak countermeasure apparatus of this invention can also be used for the purpose of prevention of oil leak beforehand in the site | part where generation | occurrence | production of the above oil leak is estimated.

1, 2 Oil leakage countermeasure device 10 of the present invention Device main body 10a Bolt insertion hole 10b Packing groove 11 Cover accommodating portion (recessed portion)
12 Bolt head receiving part 14 Bolt 15 Packing (seal member)
17 Mekura Bolt 20 Device Main Body 20a Bolt Insertion Holes 201, 202 Half Split Part 21 Piping Covers 211, 212 Half Cylindrical Part 291 Bolt 292 Nut

Claims (7)

An oil leakage countermeasure device used to prevent oil leakage from the gap between the inspection port provided on the tank wall of the oil-filled equipment and its lid and its diffusion,
A leaking device characterized by comprising a device body configured to cover and conceal the lid of the inspection port on the tank wall surface, and to have a sealing member arranged so as to surround the lid on the outside of the lid so as to be crimped to the tank wall surface. Oil countermeasure device.   The apparatus main body is a plate-like body having a larger area than the outer surface of the lid, and a concave portion for accommodating the lid is formed in the central region of one surface thereof, and the peripheral region abuts on the tank wall surface. 2. The groove according to claim 1, wherein the groove is formed on the abutting surface, and the abutting surface is provided with a groove that can be accommodated so that the seal member surrounds the recess and protrudes slightly from the abutting surface over the entire circumference. Oil leakage countermeasure device as described.   The apparatus body has bolt insertion holes in the contact surface at regular intervals in the circumferential direction, and bolt holes are drilled at positions corresponding to the bolt holes on the tank wall surface. The oil leakage countermeasure device according to claim 1 or 2, wherein the bolt hole and the bolt insertion hole are aligned to be fixed to the tank wall surface by inserting and screwing a bolt. An oil leakage countermeasure device used to prevent oil leakage from a connecting portion of a pipe connected to a tank wall of an oil-filled device and its diffusion,
On the tank wall surface, a seal member arranged so as to cover and conceal the connection part in a tight contact with the outer periphery of the pipe projecting outward from the connection part, and to surround the connection part on the outside of the connection part is provided on the tank wall surface. An oil leakage countermeasure device for oil-filled equipment, comprising an apparatus main body configured to be crimpable.   The apparatus main body is a plate-like body having a larger area than the outer surface of the connection portion and being separable into two so as to sandwich the pipe, and the center of one surface of the plate-like body The region has a recess capable of accommodating the connecting portion, and has a through-hole through which the pipe is inserted in a central region of the recess, and a peripheral region is formed on a contact surface that contacts the tank wall surface. The oil leakage countermeasure device according to claim 4, wherein the contact surface is provided with a groove that can be accommodated so that the seal member surrounds the concave portion and slightly protrudes from the contact surface over the entire circumference.   The oil leakage countermeasure device according to claim 5, wherein a groove is provided in an inner periphery of the through hole, and a second seal member is fitted into the entire periphery of the pipe.   The apparatus body has bolt insertion holes in the contact surface at regular intervals in the circumferential direction, and bolt holes are drilled at positions corresponding to the bolt holes on the tank wall surface. The oil leakage countermeasure device according to any one of claims 4 to 6, wherein the bolt hole and the bolt insertion hole are aligned to be fixed to the tank wall surface by inserting and screwing the bolt. .

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