CN111048371A - Fuse for high-voltage fuse - Google Patents
Fuse for high-voltage fuse Download PDFInfo
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- CN111048371A CN111048371A CN201811209106.7A CN201811209106A CN111048371A CN 111048371 A CN111048371 A CN 111048371A CN 201811209106 A CN201811209106 A CN 201811209106A CN 111048371 A CN111048371 A CN 111048371A
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- Prior art keywords
- fuse
- arc
- tube
- support pin
- extinguishing
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- 230000002093 peripheral effect Effects 0.000 claims description 14
- 238000007789 sealing Methods 0.000 abstract description 5
- 239000012212 insulator Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 11
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000002788 crimping Methods 0.000 description 4
- 239000002655 kraft paper Substances 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- QCEUXSAXTBNJGO-UHFFFAOYSA-N [Ag].[Sn] Chemical compound [Ag].[Sn] QCEUXSAXTBNJGO-UHFFFAOYSA-N 0.000 description 1
- PQIJHIWFHSVPMH-UHFFFAOYSA-N [Cu].[Ag].[Sn] Chemical compound [Cu].[Ag].[Sn] PQIJHIWFHSVPMH-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- XRBURMNBUVEAKD-UHFFFAOYSA-N chromium copper nickel Chemical compound [Cr].[Ni].[Cu] XRBURMNBUVEAKD-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- CLDVQCMGOSGNIW-UHFFFAOYSA-N nickel tin Chemical compound [Ni].[Sn] CLDVQCMGOSGNIW-UHFFFAOYSA-N 0.000 description 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229910000597 tin-copper alloy Inorganic materials 0.000 description 1
- 229910000969 tin-silver-copper Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
- H01H85/042—General constructions or structure of high voltage fuses, i.e. above 1000 V
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/38—Means for extinguishing or suppressing arc
Landscapes
- Fuses (AREA)
Abstract
Provided is a fuse for a high-voltage fuse, which has improved arc-extinguishing performance. The high-voltage fuse is used for a high-voltage fuse which breaks current when the current above a predetermined value flows, and comprises: a head part that is electrically connectable to the upper contact of the fuse tube; a soluble connection line connected with the header part; a fuse lead connected to the soluble connection line by a fastening member and electrically connectable to the lower contact of the fuse tube; and a cylindrical arc extinguishing tube which houses the head part, the soluble connection wire, the fastening part, and the fuse lead, and fuses the soluble connection wire by a current of a predetermined value or more. The fuse for a high-voltage fuse comprises: a 1 st support bolt for sealing the arc extinguishing pipe and provided to the head part; and a 2 nd support bolt for sealing the arc extinguishing pipe and provided to the fastening member. This improves arc extinguishing performance.
Description
Technical Field
The invention relates to a fuse for a high-voltage fuse.
Background
A high-voltage fuse is provided with a fuse that melts when a current equal to or larger than a predetermined value flows (see patent documents 1 and 2). The fuse includes: a head part that is electrically connectable to the upper contact of the fuse tube; a soluble connection line which is fused by a current of a predetermined value or more; and a lower connecting wire which is connected with the lower contact of the fuse tube in an electrifying manner. The upper end of the soluble connecting line is connected with the lower end of the head part. The lower end of the soluble connection line and the upper end of the lower connection line are connected by a fastening part.
Documents of the prior art
Patent document
Patent document 1: japanese Kokai publication Sho-60-162357
Patent document 2: chinese utility model bulletin No. 207381358
Disclosure of Invention
Problems to be solved by the invention
However, when the fuse is blown, the arc-extinguishing gas may leak from the gap between the inner surface of the arc-extinguishing tube and the fastening member toward the lower connecting wire, and the pressure in the arc-extinguishing tube may not increase. In particular, in a small current region of a current equal to or greater than a predetermined value, the arc-extinguishing gas may be insufficient in a portion of the arc-extinguishing tube where the connecting line is soluble, and the pressure may not rise and become unable to extinguish the arc. Therefore, a fuse for a high-voltage fuse having improved arc-extinguishing performance is required.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a fuse for a high-voltage fuse having improved arc-extinguishing performance.
Means for solving the problems
A fuse for a high-voltage fuse that solves the above problems is a fuse for a high-voltage fuse that disconnects a current when a current equal to or greater than a predetermined value flows, the fuse comprising: a head part that is electrically connectable to the upper contact of the fuse tube; a soluble connection line connected to the headpiece; a lower connecting wire connected to the soluble connecting wire by a fastening member and electrically connected to a lower contact of the fuse tube; and a cylindrical arc extinguishing tube that houses the head part, the soluble connection line, the fastening part, and the lower connection line, and fuses the soluble connection line by a current of a predetermined value or more, wherein the fuse for a high-voltage fuse includes a support plug that seals the arc extinguishing tube, and the support plug is provided to the fastening part.
According to the above configuration, since the lower connection wire side of the soluble connection wire in the arc extinguishing pipe is blocked without a gap by the support plug, the arc extinguishing gas can be blocked, and the pressure of the portion of the soluble connection wire in the arc extinguishing pipe can be increased sharply when the soluble connection wire is blown. This improves arc extinguishing performance. In addition, it is effective when the soluble connection line in a small current region is blown.
Preferably, the fuse for a high-voltage fuse further includes a 1 st support pin provided to the fastening member so as to seal the arc extinguishing tube, and the support pin provided to the fastening member is a 2 nd support pin.
According to the above configuration, since both ends of the soluble connection line in the arc extinguishing pipe are blocked without a gap by the 1 st and 2 nd support pins, the arc extinguishing gas can be blocked, and the pressure of the portion of the soluble connection line in the arc extinguishing pipe can be increased sharply when the soluble connection line is fused. This improves arc extinguishing performance. In addition, the fuse is also effective when the soluble connection line in the small current region is fused
In the fuse for a high-voltage fuse, it is preferable that the 1 st support plug is provided at an end portion of the headpiece on the side of the connectable wire, and the 2 nd support plug is provided at an end portion of the fastening piece on the side of the connectable wire.
According to the above configuration, since the closed space formed by the 1 st support pin and the 2 nd support pin in the arc-extinguishing pipe is narrowed, the pressure of the portion of the soluble connection line in the arc-extinguishing pipe can be further increased sharply when the soluble connection line is fused.
In the fuse for a high voltage fuse, it is preferable that the arc extinguishing tube includes a 1 st arc extinguishing tube for accommodating the head part and a 2 nd arc extinguishing tube for accommodating the lower connecting wire, a portion of the arc extinguishing tube on which the soluble connecting wire is provided is a double-layered structure of the 1 st arc extinguishing tube and the 2 nd arc extinguishing tube, an inner diameter of the 2 nd arc extinguishing tube is smaller than an inner diameter of the 1 st arc extinguishing tube, the 1 st support pin abuts against an inner wall of the 1 st arc extinguishing tube, and the 2 nd support pin abuts against an inner wall of the 2 nd arc extinguishing tube.
According to the above configuration, the strength of the portion of the arc extinguishing tube in which the soluble connection line is located is increased, and the pressure in the portion of the soluble connection line in the arc extinguishing tube can be increased further sharply when the soluble connection line is fused by shortening the inner diameter of the 2 nd arc extinguishing tube.
In the fuse for a high-voltage fuse, an end of the 1 st supporting pin preferably abuts an end of the 2 nd arc extinguishing pipe.
According to the above configuration, since the gap between the end of the 1 st support bolt and the end of the 2 nd arc-extinguishing pipe disappears and the sealed space formed by the 1 st support bolt and the 2 nd support bolt in the arc-extinguishing pipe becomes narrow, the pressure in the portion of the soluble connection line in the arc-extinguishing pipe can be further increased sharply when the soluble connection line is fused.
In the fuse for a high-voltage fuse, it is preferable that the 1 st and 2 nd support pins have a cylindrical shape.
According to the above configuration, the 1 st support pin and the 2 nd support pin can be easily formed.
In the fuse for a high-voltage fuse, it is preferable that a plurality of ribs are provided on an outer peripheral surface of at least one of the 1 st support plug and the 2 nd support plug, and the ribs extend in an axial direction of the arc extinguishing pipe.
According to the above configuration, the protrusion of the support bolt is in close contact with the inner wall of the arc extinguishing pipe, whereby the airtight space formed by the 1 st support bolt and the 2 nd support bolt in the arc extinguishing pipe can be improved.
In the fuse for a high-voltage fuse, it is preferable that a flange portion extending in a circumferential direction of the arc extinguishing pipe is provided on an outer circumferential surface of at least one of the 1 st and 2 nd support pins.
According to the above configuration, the flange portion of the support bolt is in close contact with the inner wall of the arc extinguishing pipe, whereby the airtight space formed by the 1 st support bolt and the 2 nd support bolt in the arc extinguishing pipe can be improved.
Effects of the invention
According to the present invention, arc extinguishing performance can be improved.
Drawings
Fig. 1 is a cross-sectional view showing a schematic structure of a high-voltage fuse according to embodiment 1.
Fig. 2 is a half-sectional view showing a schematic structure of a fuse tube of the high-voltage fuse according to embodiment 1.
Fig. 3 is a sectional view showing the structure of a fuse for a high-voltage fuse according to embodiment 1.
Fig. 4 is an enlarged cross-sectional view showing the structure of the fuse for the high-voltage fuse according to embodiment 1.
Fig. 5 is an enlarged cross-sectional view showing the structure of the fuse for the high-voltage fuse according to embodiment 2.
Fig. 6(a) and 6(b) are views showing the 1 st supporting pin of the fuse for the high-voltage fuse according to embodiment 2, in which fig. 6(a) is a sectional view and fig. 6(b) is a side view.
Fig. 7(a) and 7(b) are views showing a 2 nd supporting pin of a fuse for a high-voltage fuse according to embodiment 2, in which fig. 7(a) is a front view and fig. 7(b) is a side view.
Fig. 8 is an enlarged cross-sectional view showing the structure of the fuse for the high-voltage fuse according to embodiment 3.
Fig. 9 is a sectional view showing the structure of a fuse for a high-voltage fuse according to embodiment 4.
Fig. 10 is an enlarged cross-sectional view showing the structure of a fuse for a high-voltage fuse according to embodiment 4.
Fig. 11 is a cross-sectional view showing a structure of a fuse for a high-voltage fuse according to a modification.
Fig. 12 is an enlarged cross-sectional view showing the structure of the fuse for a high-voltage fuse according to this modification.
Detailed Description
(embodiment 1)
Hereinafter, embodiment 1 of the fuse for a high-voltage fuse will be described with reference to fig. 1 to 4.
As shown in fig. 1, the porcelain main insulator 10 of the high-voltage fuse 1 is formed in a cylindrical shape. A plurality of insulation pleats 18 are formed on the outer peripheral surface of the main body insulator 10. The lower end of the main insulator 10 is open, forming a lower end opening 14. A cylindrical upper chamber 11 and a cylindrical lower chamber 12 are formed inside the main body insulator 10, and the lower chamber 12 communicates with the lower portion of the upper chamber 11 and has an inner diameter larger than that of the upper chamber 11.
The high-voltage fuse 1 is mounted to a bracket of a utility pole by a mounting part 110. The sleeve portion 114 of the mounting component 110 is fixed to the outer periphery of the center in the vertical direction of the main insulator 10.
In the high-voltage fuse 1, a fuse tube 40 is housed in an upper chamber 11 and a lower chamber 12 in a main body insulator 10. The high-voltage fuse 1 is provided with an upper electrode 23 and a lower electrode 34. A conical upper shell 21 is bonded to the upper end 13 of the main insulator 10 with an adhesive. The upper die cone 21 is fixedly connected to the screw portion of the upper electrode 23. The lead wire 21a of the upper die cone 21 is connected to an external electric wire of a distribution line.
A conical lower shell 31 is bonded to the lower side wall 15 of the main insulator 10 with an adhesive. A connection wire 32 is connected to the base end of the lead wire 31a of the lower die cone 31. The connection line 32 of the lower die cone 31 is fixed to the lower electrode 34 by screws. The connection wire 32 is fixed in the main insulator 10 by a square nut 33 as a fixing member. The lower shell 31 is fixed to the main insulator 10 by a square nut 33. The lead wire 31a of the lower die cone 31 is connected to a device such as a transformer provided in a distribution line via an external electric wire. The lower electrode 34 is fitted and locked in the lower chamber 12 in the main insulator 10. A buffer member 36 made of resin is disposed above the lower electrode 34. The buffer member 36 abuts on the upper portion of the lower chamber 12 through a buffer plate 37. A cylindrical arc extinguishing cylinder 35 is mounted around the fuse cylinder 40. The lower end of the arc-extinguishing cylinder 35 abuts on the upper surface of the buffer plate 37.
A closing cap member 19 is fixed to an inner wall 12a of the lower chamber 12 of the main insulator 10 with an adhesive 17, and the closing cap member 19 covers the lower end opening 14 of the main insulator 10. The closing member 19 is formed in a bottomed cylindrical shape by an elastic member such as a crack-resistant rubber material or a soft synthetic resin.
The fuse cylinder 40 connects the upper electrode 23 and the lower electrode 34. As shown in fig. 2, at the upper end of the fuse tube 40, an insulating tube 42 is provided which fixes a tubular upper contact 41. A lower contact 47 having an annular contact portion 47a is inserted into the insulating tube 42. A display cylinder 48 is fixedly mounted on the lower end of the insulating cylinder 42. A spring 49 is interposed between the lower contact 47 and the display cylinder 48. In the insulating cylinder 42, a fuse 50 is provided by being stretched between the upper contact 41 and the lower contact 47 by a spring 49.
An uneven surface 41a such as knurling is formed on the outer periphery of the lower end portion of the upper contact 41. Thus, when the upper contact 41 is screwed to the upper part 42b of the fuse tube 40 after the fuse 50 is inserted, the concave-convex surface 41a makes sliding difficult, so that fastening can be reliably performed. The rated value of the fuse 50 is printed on the upper surface of the contact portion 51a of the header 51. Further, a label indicating a rating of the fuse 50 is attached to the outer peripheral surface of the arc extinguishing tube 43.
As shown in fig. 2 and 3, the fuse 50 includes a header 51, a tensile cord 53, a fusible link 52, and a fuse lead 45. The fuse lead 45 corresponds to a lower connection line. A connection terminal 45a is provided at the end of the fuse lead 45. The connection terminal 45a is fastened and fixed to a fixing portion 47b provided in the lower contact 47 by a fastening screw 46. The upper contact 41 and the lower contact 47 of the fuse cartridge 40 are electrically connected through the fuse 50. The soluble connection line 52 of the fuse 50 blows when an over-rated current flows.
The soluble connection line 52 is a low melting point metal, corresponding to a soluble body. The low melting point metal is a tin single body or an alloy mainly composed of tin (tin-nickel alloy, tin-silver alloy, tin-copper alloy, tin-silver-copper alloy, etc.). In addition, the low melting point metal preferably does not contain lead. The tensile wire 53 is made of stainless steel, a single body mainly composed of copper and silver, or an alloy wire made of copper-nickel alloy, copper-nickel-chromium alloy, or the like, which functions as a resistor.
As shown in fig. 3, the head piece 51, the soluble connection line 52, the tensile line 53, and the fuse lead 45 are inserted and mounted in the cylindrical arc extinguishing tube 43. The arc extinguishing pipe 43 is formed by winding kraft paper or the like.
The header part 51 includes a disc-shaped contact portion 51a and a columnar connecting portion 51 b. The contact portion 51a of the head member 51 is formed larger than the outer diameter of the arc extinguishing tube 43. The contact point portion 51a of the head part 51 protrudes from the upper end of the arc extinguishing tube 43. A cylindrical support plug 55 is fitted to the connection portion 51b of the head part 51. The arc extinguishing pipe 43 is fitted to the support pin 55. The headpiece 51 is supported by a support pin 55. A stepped portion 43a is formed at the upper end portion of the arc extinguishing pipe 43, and the stepped portion 43a is reduced in diameter by winding a few turns of kraft paper. A spring washer 44 is fitted to a step portion 43a at the upper end of the arc extinguishing pipe 43. Thus, the spring washer 44 is not detached by the head part 51 and the step portion 43a of the arc extinguishing pipe 43. When the fuse 50 is mounted to the fuse tube 40 via the spring washer 44, the upper contact 41 can be reliably fixed to the insulating tube 42, and the current can be reliably applied thereto.
The headpiece 51 and the fuse lead 45 are connected by a soluble connection line 52 and a tensile line 53. The upper ends of the soluble connection line 52 and the tensile line 53 are inserted into the cylindrical holes of the connection portion 51b located at the lower end of the headpiece 51. The connection portion 51b at the lower end of the headpiece 51 is fixed by crimping by caulking in a state where the soluble connecting wire 52 and the upper end of the tensile wire 53 are inserted. Thereby, the lower end of the headpiece 51 is connected to the upper ends of the soluble connecting wire 52 and the tensile wire 53 by pressure contact.
The soluble connection line 52, the tensile line 53 and the fuse lead 45 are connected and fixed by a cylindrical fastening part 54. The lower end portions of the soluble connecting thread 52 and the tensile thread 53 are inserted into the upper end portion of the fastening part 54. The upper end of the fastener 54 is fixed by crimping by caulking in a state where the soluble connecting wire 52 and the lower end of the tensile wire 53 are inserted. Thereby, the upper end of the fastener 54 is connected to the lower ends of the soluble connecting wire 52 and the tensile wire 53 by pressure welding.
The upper end portion of the fuse lead 45 is inserted into the lower end portion of the fastening part 54. The lower end of the fastener 54 is fixed by crimping by caulking in a state where the upper end of the fuse lead 45 is inserted. Thereby, the lower end of the fastening part 54 and the upper end of the fuse lead 45 are connected by pressure contact. The lower end portion of the fuse lead 45 is fixed by crimping in a state inserted into the cylindrical portion of the connection terminal 45 a.
The fuse 50 includes a 1 st support pin 57, and the 1 st support pin 57 seals the arc extinguishing tube 43 and is provided to the headpiece 51. The 1 st support pin 57 is provided on the soluble connection line 52 side of the headpiece 51. The fuse 50 includes a 2 nd support pin 58, and the 2 nd support pin 58 seals the arc extinguishing tube 43 and is provided to the fastening member 54. The 2 nd support pin 58 is provided on the soluble connection line 52 side of the fastening part 54.
Next, a connection structure of the headpiece 51, the 1 st support pin 57, the soluble connection line 52, the 2 nd support pin 58, and the fuse lead 45 will be described with reference to fig. 4.
As shown in fig. 4, the 1 st supporting pin 57 has a cylindrical shape having a through hole 57a, and the soluble connecting thread 52 and the tensile thread 53 penetrate through the through hole 57 a. The upper surface 57b of the 1 st support pin 57 contacts the lower end 51c of the headpiece 51. The 1 st support pin 57 has an outer diameter substantially the same as the inner diameter of the arc extinguishing tube 43. The outer peripheral surface of the 1 st support pin 57 abuts against the inner wall of the arc extinguishing pipe 43.
The No. 2 support pin 58 has a cylindrical shape having a through hole 58a, and the soluble connecting thread 52 and the tensile thread 53 penetrate through the through hole 58 a. The lower surface 58b of the 2 nd support pin 58 contacts the upper end 54a of the fastening part 54. The outer diameter of the No. 2 support pin 58 is substantially the same as the inner diameter of the arc-extinguishing tube 43. The outer peripheral surface of the 2 nd support pin 58 abuts against the inner wall of the arc extinguishing pipe 43.
The portion of the arc extinguishing tube 43 where the connecting line 52 is soluble is formed with a closed space 59 by the inner wall of the arc extinguishing tube 43, the 1 st support pin 57 and the 2 nd support pin 58. Therefore, the soluble connection line 52 is fused, and the closed space 59 is filled with the arc-extinguishing gas generated from the inner surface of the arc extinguishing pipe 43 by the heat of the fusion-extinguishing gas, so that the pressure in the closed space 59 is further increased rapidly, and the arc generated in the fused portion can be extinguished by the arc-extinguishing gas. This improves arc extinguishing performance.
Next, the operation of the high-voltage fuse 1 configured as described above will be described.
When a current of a predetermined value or more flows through the high-voltage fuse 1, the fusible link line 52 is fused and the tensile wire 53 is cut. Then, the insulating cylinder 42 of the fuse cylinder 40 is moved toward the lower end opening 14 of the main insulator 10 by the spring 49, and the indication cylinder 48 is projected from the main insulator 10. Thereby, the upper contact 41 of the fuse tube 40 is disengaged from the upper electrode 23, and the current is disconnected. At this time, the step portion 42a of the insulating tube 42 abuts against the spring 47c in the contact portion 47a of the lower contact 47. This damps the downward movement of the insulating tube 42, and thus prevents the fuse tube 40 from falling off due to the impact of the insulating tube 42.
Next, the effects of the present embodiment will be described.
(1) Since the front and rear sides of the soluble connection line 52 in the arc extinguishing pipe 43 are blocked by the 1 st support pin 57 and the 2 nd support pin 58 without a gap, the arc extinguishing gas can be confined in the sealed space 59, and the pressure of the portion of the soluble connection line 52 in the arc extinguishing pipe 43 can be rapidly increased when the soluble connection line 52 is fused. This improves arc extinguishing performance. In addition, it is also effective when the soluble connection line 52 in a small current region is blown.
(2) The 1 st support pin 57 is provided at the end of the headpiece 51 on the soluble thread 52 side, and the 2 nd support pin 58 is provided at the end of the fastening piece 54 on the soluble thread 52 side. As a result, the pressure in the portion of the soluble connection line 52 in the arc extinguishing tube 43 can be further increased sharply when the soluble connection line 52 is fused because the sealed space 59 formed by the 1 st support pin 57 and the 2 nd support pin 58 in the arc extinguishing tube 43 is narrowed.
(3) Since the 1 st and 2 nd support pins 57, 58 have a cylindrical shape, the 1 st and 2 nd support pins 57, 58 can be easily formed.
(embodiment 2)
Hereinafter, embodiment 2 of the fuse for a high-voltage fuse will be described with reference to fig. 5 to 7. The 1 st and 2 nd support pins 57, 58 of the high-voltage fuse according to this embodiment are different in shape from those of the 1 st embodiment. The following description focuses on differences from embodiment 1.
As shown in fig. 5, the fuse 60 includes a 1 st support pin 67, and the 1 st support pin 67 is provided in the header part 51 to seal the arc extinguishing tube 43. The 1 st support pin 67 is provided on the soluble connection line 52 side of the headpiece 51. The fuse 60 includes a 2 nd support pin 68, and the 2 nd support pin 68 seals the arc extinguishing tube 43 and is provided to the fastening member 54. The 2 nd support pin 68 is provided on the soluble connection line 52 side of the fastening part 54.
As shown in fig. 5 and 6(a), the 1 st support pin 67 has a cylindrical shape having a through hole 67a, and the head component 51 is inserted into the through hole 67 a. The 1 st support pin 67 is attached to the outer periphery of the lower end portion of the headpiece 51. As shown in fig. 6(b), a plurality of projections 67b are provided at equal intervals in the circumferential direction on the outer peripheral surface of the 1 st support pin 67, and the projections 67b extend in the axial direction of the arc extinguishing pipe 43. The protrusion 67b protrudes from the inner diameter of the arc extinguishing tube 43. Therefore, when the 1 st support pin 67 is inserted into the arc-extinguishing tube 43, the projection 67b is attached in a deformed state, and the outer peripheral surface of the 1 st support pin 67 is in close contact with the inner wall of the arc-extinguishing tube 43.
As shown in fig. 5 and 7(a), the No. 2 support pin 68 has a cylindrical shape having a through hole 68a, and the soluble connecting thread 52 and the tensile thread 53 penetrate through the through hole 68 a. The lower surface 68b of the 2 nd support pin 68 is in contact with the upper end 54a of the fastening part 54. As shown in fig. 7(b), a flange 68c having an enlarged diameter is provided on the upper surface side of the 2 nd support pin 68. The outer diameter of the flange portion 68c is formed slightly larger than the inner diameter of the arc extinguishing pipe 43. The outer diameter of the 2 nd support pin 68 other than the flange portion 68c is formed slightly smaller than the inner diameter of the arc extinguishing pipe 43. Therefore, when the 2 nd support pin 68 is inserted into the arc-extinguishing tube 43, the flange portion 68c is attached in a bent state, and the outer peripheral surface of the 2 nd support pin 68 is in close contact with the inner wall of the arc-extinguishing tube 43.
The portion of the arc extinguishing tube 43 where the connecting line 52 is soluble forms a closed space 69 by the inner wall of the arc extinguishing tube 43, the 1 st support pin 67, and the 2 nd support pin 68. Therefore, the soluble connection line 52 is fused, and the arc-extinguishing gas generated from the inner surface of the arc-extinguishing tube 43 by the heat fills the sealed space 69, so that the pressure in the sealed space 69 is further increased rapidly, and the arc generated at the fused portion can be extinguished by the arc-extinguishing gas. This improves arc extinguishing performance.
Next, the effects of the present embodiment will be described. In addition to the effects (1) and (2) of embodiment 1, the following effect is also obtained.
(4) The sealing of the sealed space 69 formed by the 1 st support pin 67 and the 2 nd support pin 68 in the arc extinguishing pipe 43 can be improved by the contact of the ridge 67b of the 1 st support pin 67 with the inner wall of the arc extinguishing pipe 43.
(5) The flange portion 68c of the 2 nd support plug 68 is in close contact with the inner wall of the arc extinguishing pipe 43, whereby the sealing of the sealed space 69 formed by the 1 st support plug 67 and the 2 nd support plug 68 in the arc extinguishing pipe 43 can be improved.
(embodiment 3)
Hereinafter, embodiment 3 of the high-voltage fuse will be described with reference to fig. 8. The 1 st supporting pin of the fuse for a high-voltage fuse according to this embodiment is different in shape from the 2 nd embodiment. The following description focuses on differences from embodiment 2.
As shown in fig. 8, the fuse 70 includes a 1 st support pin 77, and the 1 st support pin 77 seals the arc extinguishing tube 43 and is provided in the connecting portion 51b of the head component 51. The 1 st support pin 77 is provided on the soluble connection line 52 side of the headpiece 51. The 1 st support pin 77 has a cylindrical shape having a through hole 77a, and the connecting portion 51b of the head component 51 is inserted into the through hole 77 a. The 1 st support pin 77 is attached to the outer periphery of the lower end portion of the head part 51. A plurality of flange portions 77b are provided on the outer peripheral surface of the 1 st support pin 77, and the flange portions 77b extend in the circumferential direction of the arc extinguishing pipe 43. The flange 77b is provided at the upper end, the center, and the lower end of the 1 st support pin 77. The outer diameter of the flange portion 77b is formed slightly larger than the inner diameter of the arc extinguishing pipe 43. The outer diameter of the 1 st support pin 77 other than the flange portion 77b is formed slightly smaller than the inner diameter of the arc extinguishing pipe 43. Therefore, when the 1 st support pin 77 is inserted into the arc-extinguishing tube 43, the flange portion 77b is attached in a bent state, and the outer peripheral surface of the 1 st support pin 77 is in close contact with the inner wall of the arc-extinguishing tube 43.
The portion of the arc extinguishing pipe 43 where the connecting line 52 is soluble is formed with a closed space 79 by the inner wall of the arc extinguishing pipe 43, the 1 st support pin 77, and the 2 nd support pin 68. Therefore, the soluble connection line 52 is fused, and the arc-extinguishing gas generated from the inner surface of the arc-extinguishing tube 43 by the heat fills the sealed space 79, so that the pressure in the sealed space 79 is further increased rapidly, and the arc generated at the fused portion can be extinguished by the arc-extinguishing gas. This improves arc extinguishing performance.
Next, the effects of the present embodiment will be described. In addition to the effects (1) and (2) of embodiment 1 and (5) of embodiment 2, the following effect is also obtained.
(6) The flange portion 77b of the 1 st support plug 77 is in close contact with the inner wall of the arc extinguishing pipe 43, whereby the sealing of the sealed space 79 formed by the 1 st support plug 77 and the 2 nd support plug 68 in the arc extinguishing pipe 43 can be improved.
(embodiment 4)
Hereinafter, embodiment 4 of the high-voltage fuse will be described with reference to fig. 9 and 10. The shape of the arc extinguishing tube of the high-voltage fuse of this embodiment is different from that of embodiment 2. The following description focuses on differences from embodiment 2.
As shown in fig. 9, the fuse 80 includes a 1 st arc-extinguishing tube 83 and a 2 nd arc-extinguishing tube 84. The head piece 51, the soluble connection line 52, and the tensile cord 53 are inserted and installed in the cylindrical 1 st arc-extinguishing tube 83. The soluble connection wire 52, the tension wire 53, the fastening member 54, and the fuse lead wire 45 are inserted into the cylindrical No. 2 arc extinguishing tube 84. The 1 st and 2 nd arc extinguishing tubes 83 and 84 are formed by winding kraft paper or the like. The 2 nd arc-extinguishing tube 84 is inserted into the 1 st arc-extinguishing tube 83 and fixed by adhesion.
As shown in fig. 10, the outer diameter of 2 nd arc-extinguishing tube 84 is substantially the same as the inner diameter of 1 st arc-extinguishing tube 83. The upper end 84a of the 2 nd arc-extinguishing tube 84 abuts against the lower end 67c of the 1 st support pin 67. Thus, the soluble connecting line 52 has a double-layer structure of the 1 st arc-extinguishing tube 83 and the 2 nd arc-extinguishing tube 84. In addition, the 2 nd arc-extinguishing tube 84 is thinner than the 1 st arc-extinguishing tube 83. That is, the inner diameter of the 2 nd arc-extinguishing tube 84 is shorter than the inner diameter of the 1 st arc-extinguishing tube 83.
The outer diameter of the 1 st support pin 67 is substantially the same as the inner diameter of the 1 st arc-extinguishing tube 83. When the 1 st support pin 67 is inserted into the 1 st arc-extinguishing tube 83, the projection 67b is attached in a deformed state, and the outer peripheral surface of the 1 st support pin 67 is in close contact with the inner wall of the 1 st arc-extinguishing tube 83.
The outer diameter of the 2 nd support pin 68 other than the flange portion 68c is formed to be slightly shorter than the inner diameter of the 2 nd arc extinguishing pipe 84. When the 2 nd support pin 68 is inserted into the 2 nd arc-extinguishing tube 84, the flange 68c is attached in a bent state, and the outer peripheral surface of the 2 nd support pin 68 is in close contact with the inner wall of the 2 nd arc-extinguishing tube 84.
The portion of the soluble connection line 52 of the 2 nd arc-extinguishing tube 84 forms a closed space 89 by the inner wall of the 2 nd arc-extinguishing tube 84, the 1 st support pin 67, and the 2 nd support pin 68. Since the 2 nd arc-extinguishing tube 84 is thinner than the 1 st arc-extinguishing tube 83, the closed space 89 becomes a further narrow space. Therefore, the soluble connection line 52 is fused, and the arc-extinguishing gas generated on the inner surface of the 2 nd arc-extinguishing pipe 84 by the heat of the soluble connection line fills the closed space 89, so that the pressure in the closed space 89 is further increased rapidly, and the arc generated in the fused portion can be extinguished by the arc-extinguishing gas. This improves arc extinguishing performance.
Next, the effects of the present embodiment will be described. In addition to the effects of (1), (2) of embodiment 1 and (4), (5) of embodiment 2, the following effect is also obtained.
(7) Since the inner diameter of the 2 nd arc-extinguishing tube 84 is shorter than that of the 1 st arc-extinguishing tube 83, a further narrow closed space 89 can be formed.
(other embodiments)
The above embodiments can be modified and implemented as follows. The above embodiments and the following modifications can be combined and implemented within a range not inconsistent with the technology.
In embodiment 2 described above, the flange portion 68c of the 2 nd support plug 68 is provided on the soluble connection line 52 side and the upper end side, but may be provided on the fastening part 54 side and the lower end side. Further, a plurality of flange portions 68c may be provided.
Although the 1 st support pin 67 is attached to the outer periphery of the lower end portion of the head part 51 in the above-described embodiment 2, the 1 st support pin 67 may be attached to the central portion or the upper end portion of the head part 51.
In the above-described embodiment 2, the 2 nd support pin 68 is provided at the upper end of the fastening part 54, but the 2 nd support pin may be attached to the fastening part 54 so that the 1 st support pin 67 is attached to the head part 51. In this case, the 2 nd support pin may be attached to the center portion or the lower end portion of the fastening part 54. Further, it is preferably attached to the soluble connecting line 52 side.
In embodiment 3 described above, the 1 st support pin 77 is provided with 3 flange portions 77b, but may be provided with 4 or more, or 1 or 2. Further, it is preferably provided on the soluble connecting line 52 side.
In embodiment 2 described above, the flange portion 68c is provided in the 2 nd support bolt 68, but instead of the flange portion 68c, a bead extending in the axial direction may be provided in the 2 nd support bolt 68.
In embodiment 4, the upper end 84a of the 2 nd arc-extinguishing tube 84 is brought into contact with the lower end 67c of the 1 st supporting pin 67, but the upper end 84a of the 2 nd arc-extinguishing tube 84 may not be brought into contact with the lower end 67c of the 1 st supporting pin 67.
In embodiment 4, the 2 nd arc-extinguishing tube 84 is inserted inside the 1 st arc-extinguishing tube 83. However, the outer diameter of the 1 st arc-extinguishing tube 83 may be made substantially the same as the inner diameter of the 2 nd arc-extinguishing tube 84, and the 1 st arc-extinguishing tube 83 may be inserted inside the 2 nd arc-extinguishing tube 84.
In the structure of each of the above embodiments, the tensile cord 53 may be omitted.
In the configuration of each of the above embodiments, the arc-extinguishing layer may be formed by applying a mixture of an arc-extinguishing agent powder such as boric acid or aluminum hydroxide and a binder to the inner surface of the arc-extinguishing tube 43 (2 nd arc-extinguishing tube 84).
In each of the above embodiments, the 2 support pins 1, 57(67, 77) and 2, 58(68) are provided, but the 1 st support pin 57(67, 77) may be omitted and only the 2 nd support pin 58(68) may be provided. With this configuration, the portion of the soluble connection line 52 in the arc extinguishing pipe 43 forms a closed space by the inner wall of the arc extinguishing pipe 43, the support pin 55 of the head part 51, and the No. 2 support pin 58 (68). Therefore, when the soluble connection line 52 is fused, the arc-extinguishing gas can be confined in the sealed space, the pressure in the sealed space can be increased rapidly, and the arc generated at the fused portion can be extinguished by the arc-extinguishing gas. This improves arc extinguishing performance. In addition, it is also effective when the soluble connection line 52 in a small current region is blown.
The support pins 55 and the 1 st support pins 57(67, 77) of the head part 51 may be omitted, only the 2 nd support pins 58(68) may be provided, and the arc extinguishing pipe 43 may be directly attached to the head part 51. As shown in fig. 11 and 12, the fuse 90 has a small diameter portion 51d with a reduced diameter provided at the connecting portion 51b of the head part 51, and the small diameter portion 51d is inserted into the arc extinguishing pipe 43. With this configuration, the portion of the soluble connection line 52 in the arc extinguishing pipe 43 forms a closed space by the inner wall of the arc extinguishing pipe 43, the head part 51, and the No. 2 support pin 68. Therefore, when the soluble connection line 52 is fused, the arc-extinguishing gas can be confined in the sealed space, the pressure in the sealed space can be increased rapidly, and the arc generated at the fused portion can be extinguished by the arc-extinguishing gas. This improves arc extinguishing performance. In addition, it is also effective when the soluble connection line 52 in a small current region is blown. The connection portion 51b of the head component 51 may not have a stepped portion, and the outer diameter of the entire connection portion 51b may be the same as the inner diameter of the arc extinguishing tube 43.
Description of the reference numerals
1 … high-voltage fuse, 10 … main body insulator, 11 … upper chamber, 12 … lower chamber, 12a … inner wall, 13 … upper end, 14 … lower end opening, 15 … lower side wall, 17 … adhesive, 18 … insulating fold, 20 … upper die cone, 21 … lower side wall, 21a … lead wire, 23 … upper electrode, 31 … lower die cone, 31a … lead wire, 32 … connecting wire, 33 … quadrangular nut, 34 … lower electrode, 35 … arc elimination cylinder, 36 … buffer component, 37 … buffer plate, 40 … fuse cylinder, 41 … upper contact, 41a … concave-convex surface, 42 … insulating cylinder, 43 … arc elimination tube, 43a …, 44 … spring washer, 45 … fuse lead wire, 45a … connecting terminal, … fastening screw, 47 … lower contact, 47a … contact part, 3647 b 72 contact part, … c spring 72, … spring washer, … spring 72, … display …, … fuse tube, … display, 51 … head part, 51a … contact part, 51b … connecting part, 51c … lower end, 51d … small-diameter part, 52 … soluble connecting wire, 53 … tensile wire, 54 … fastening part, 54a … upper end, 55 … supporting bolt, 57 … 1 st supporting bolt, 57a … through hole, 57b … upper surface, 58 … nd 2 supporting bolt, 58a … through hole, 58b … lower surface, 59 … enclosed space, 60 … fuse, 67 … st 1 supporting bolt, 67a … through hole, 67b … protruding strip, 67c … lower end, 68 … nd 2 supporting bolt, 68a … through hole, 68b … lower surface, 68c … flange, 69 … enclosed space, 70 … fuse, 77 … th supporting bolt, 77a … through hole, 77b … enclosed space, 3680 fuse, 3683 th 1 arc tube 3684 arc extinguishing tube …, … arc extinguishing tube … upper end, … arc extinguishing tube …, … upper end, A 90 … fuse.
Claims (8)
1. A fuse for a high-voltage fuse for interrupting a current when the current equal to or larger than a predetermined value flows, the fuse comprising: a head part that is electrically connectable to the upper contact of the fuse tube; a soluble connection line connected to the headpiece; a lower connecting wire connected to the soluble connecting wire by a fastening member and electrically connected to a lower contact of the fuse tube; and a cylindrical arc extinguishing pipe which houses the head part, the soluble connection line, the fastening part, and the lower connection line, and fuses the soluble connection line by a current of a predetermined value or more,
the fuse for a high-voltage fuse includes a support plug that seals the arc extinguishing pipe, and the support plug is provided to the fastening member.
2. The fuse for a high voltage fuse according to claim 1,
the fuse for a high-voltage fuse further comprises a 1 st support plug which seals the arc extinguishing pipe and is provided to the fastening member,
the support pin provided in the fastening member is set to be a 2 nd support pin.
3. The fuse for a high voltage fuse according to claim 2,
the 1 st support pin is provided at an end portion of the headpiece on the side of the connectable wire,
the 2 nd support pin is provided at an end portion of the fastener element on the side of the connectable wire.
4. The fuse for a high voltage fuse according to claim 2,
the arc-extinguishing tube is provided with a 1 st arc-extinguishing tube for accommodating the head part and a 2 nd arc-extinguishing tube for accommodating the lower connecting wire,
the part of the soluble connecting line of the arc-extinguishing tube is a double-layer structure of the No. 1 arc-extinguishing tube and the No. 2 arc-extinguishing tube,
the inner diameter of the No. 2 arc-extinguishing pipe is shorter than that of the No. 1 arc-extinguishing pipe,
the 1 st supporting bolt is abutted with the inner wall of the 1 st arc extinguishing pipe,
the No. 2 supporting bolt is abutted against the inner wall of the No. 2 arc extinguishing pipe.
5. The fuse for a high voltage fuse according to claim 4,
the end of the No. 1 supporting bolt is abutted with the end of the No. 2 arc extinguishing pipe.
6. The fuse for a high voltage fuse according to any one of claims 1 to 5,
the 1 st and 2 nd support pins have a cylindrical shape.
7. The fuse for a high voltage fuse according to claim 6,
a plurality of ribs are provided on an outer peripheral surface of at least one of the 1 st support pin and the 2 nd support pin, and the ribs extend in an axial direction of the arc extinguishing pipe.
8. The fuse for a high voltage fuse according to claim 6,
a flange portion is provided on an outer peripheral surface of at least one of the 1 st support bolt and the 2 nd support bolt, and the flange portion extends in a circumferential direction of the arc extinguishing pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018193740A JP7034882B2 (en) | 2018-10-12 | 2018-10-12 | Fuse for high voltage blower |
| JP2018-193740 | 2018-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111048371A true CN111048371A (en) | 2020-04-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811209106.7A Pending CN111048371A (en) | 2018-10-12 | 2018-10-17 | Fuse for high-voltage fuse |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7034882B2 (en) |
| CN (1) | CN111048371A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114512377A (en) * | 2020-11-16 | 2022-05-17 | 爱那其斯株式会社 | Fuse for high-voltage fuse |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7383658B2 (en) * | 2020-11-16 | 2023-11-20 | エナジーサポート株式会社 | Fuse for high pressure blower |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201282089Y (en) * | 2008-10-08 | 2009-07-29 | 日本能源服务株式会社 | Fuse for high-voltage fuse |
| CN102306591A (en) * | 2011-08-31 | 2012-01-04 | 中国西电电气股份有限公司 | Self-energy arc extinguishing switch device comprising composite insulation cylinder |
| CN203562382U (en) * | 2013-07-26 | 2014-04-23 | 日本能源服务株式会社 | Fuse used for high voltage fuse |
| WO2015121439A1 (en) * | 2014-02-14 | 2015-08-20 | Alstom Technology Ltd | Cutoff chamber for a medium-voltage or high-voltage electrical current cutoff appliance with a bulb comprising a liquid |
| CN107359095A (en) * | 2017-07-26 | 2017-11-17 | 河南平开科技有限公司 | A kind of fusing injection structure being used in outdoor closed injection fuse box |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5979950U (en) * | 1982-11-18 | 1984-05-30 | 大阪ヒューズ株式会社 | High voltage cutout fuse |
| JP5587752B2 (en) * | 2010-11-30 | 2014-09-10 | 大阪ヒューズ株式会社 | High voltage cutout fuse lead wire connector |
-
2018
- 2018-10-12 JP JP2018193740A patent/JP7034882B2/en active Active
- 2018-10-17 CN CN201811209106.7A patent/CN111048371A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201282089Y (en) * | 2008-10-08 | 2009-07-29 | 日本能源服务株式会社 | Fuse for high-voltage fuse |
| CN102306591A (en) * | 2011-08-31 | 2012-01-04 | 中国西电电气股份有限公司 | Self-energy arc extinguishing switch device comprising composite insulation cylinder |
| CN203562382U (en) * | 2013-07-26 | 2014-04-23 | 日本能源服务株式会社 | Fuse used for high voltage fuse |
| WO2015121439A1 (en) * | 2014-02-14 | 2015-08-20 | Alstom Technology Ltd | Cutoff chamber for a medium-voltage or high-voltage electrical current cutoff appliance with a bulb comprising a liquid |
| CN107359095A (en) * | 2017-07-26 | 2017-11-17 | 河南平开科技有限公司 | A kind of fusing injection structure being used in outdoor closed injection fuse box |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114512377A (en) * | 2020-11-16 | 2022-05-17 | 爱那其斯株式会社 | Fuse for high-voltage fuse |
| CN114512377B (en) * | 2020-11-16 | 2024-04-05 | 爱那其斯株式会社 | Fuse for high voltage fuse |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020061334A (en) | 2020-04-16 |
| JP7034882B2 (en) | 2022-03-14 |
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