JPWO2009001425A1 - Metal closed switchgear - Google Patents

Metal closed switchgear Download PDF

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JPWO2009001425A1
JPWO2009001425A1 JP2009520227A JP2009520227A JPWO2009001425A1 JP WO2009001425 A1 JPWO2009001425 A1 JP WO2009001425A1 JP 2009520227 A JP2009520227 A JP 2009520227A JP 2009520227 A JP2009520227 A JP 2009520227A JP WO2009001425 A1 JPWO2009001425 A1 JP WO2009001425A1
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Prior art keywords
check valve
flapper
latch
valve flapper
air passage
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JP4937350B2 (en
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徹 山地
徹 山地
佐野　幸治
幸治 佐野
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56—Cooling; Ventilation
    • H02B1/565—Cooling; Ventilation for cabinets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/02—Details

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Patch Boards (AREA)
  • Domestic Plumbing Installations (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Check Valves (AREA)

Abstract

内部アーク事故により発生した高温高圧ガスが通気路を逆流するのを未然に防止出来、信頼性の高い金属閉鎖型スイッチギヤを得る。高圧機器であるケーブル７が収容されたケーブル室３の換気を行う通気路１２中に設けられ、前記ケーブル室３内の内圧上昇に応動して通気路１２を閉塞する逆止弁式フラッパー１３ａと、この逆止弁式フラッパー１３ａの閉成位置に設けられ、逆止弁式フラッパー１３ａの閉成動作中に前記閉成位置からの反転を阻止するラッチ１４とを備えた。It is possible to prevent the high-temperature and high-pressure gas generated by the internal arc accident from flowing back through the air passage, and to obtain a highly reliable metal closed switchgear. A check valve flapper 13a provided in the air passage 12 for ventilating the cable chamber 3 in which the cable 7 which is a high-pressure device is accommodated, and closing the air passage 12 in response to an increase in internal pressure in the cable chamber 3; The latch 14 is provided at the closed position of the check valve flapper 13a, and prevents the reverse from the closed position during the closing operation of the check valve flapper 13a.

Description

この発明は、遮断器等が収納された金属閉鎖型スイッチギヤに関するものである。 The present invention relates to a metal closed switchgear in which a circuit breaker and the like are housed.

従来の金属閉鎖型スイッチギヤでは、内部に高温高圧ガスが発生した場合、スイッチギヤ天井部に設けた放圧板の開放によって高温高圧ガスが盤外へ排出される。これと同時に、通気路に設けたシャッタが内圧の上昇に応動して通気路を閉塞する。これにより、高温高圧ガスが通気路を逆流して、盤周囲への放出を防止している(例えば、特許文献１参照)。 In the conventional metal closed type switchgear, when high-temperature high-pressure gas is generated inside, the high-temperature high-pressure gas is discharged out of the panel by opening the pressure release plate provided on the switchgear ceiling. At the same time, a shutter provided in the air passage is closed in response to an increase in internal pressure. As a result, the high-temperature and high-pressure gas flows backward through the air passage to prevent discharge to the periphery of the panel (for example, see Patent Document 1).

特開２０００−２２８８０３号公報 （第２頁、第１図）JP 2000-228803 A (2nd page, FIG. 1)

上記のような従来の金属閉鎖型スイッチギヤでは、通気路の閉塞時において、シャッタが反動でもって再度開いてしまう。このため、高温高圧ガスの逆流を防げずに盤周のガス放出を十分に防止出来ないという問題が有った。 In the conventional metal closed switchgear as described above, when the air passage is closed, the shutter is reopened due to the reaction. For this reason, there was a problem that the gas discharge around the panel could not be sufficiently prevented without preventing the backflow of the high-temperature and high-pressure gas.

この発明は、上述のような問題を解決するためになされたもので、内部に発生した高温高圧ガスの逆流を未然に防止出来、信頼性の高い金属閉鎖型スイッチギヤを得るものである。 The present invention has been made to solve the above-described problems, and is capable of preventing the backflow of the high-temperature and high-pressure gas generated therein and obtaining a highly reliable metal closed switchgear.

この発明に係わる金属閉鎖型スイッチギヤは、区画室内の内圧上昇に応動して通気路を閉塞する逆止弁式フラッパーの閉成位置に設けられ、逆止弁式フラッパーの閉成動作中に前記閉成位置からの反転を阻止するラッチ機構を備えたものである。 The metal closed type switchgear according to the present invention is provided at the closed position of the check valve flapper that closes the air passage in response to the increase in the internal pressure in the compartment, and the above described during the check valve flapper closing operation. A latch mechanism is provided that prevents reversal from the closed position.

この発明によれば、高温高圧ガスが通気路を逆流するのを未然に防止出来、盤周囲への放出防止に対する信頼性の高い金属閉鎖型スイッチギヤを得ることが出来る。 According to the present invention, it is possible to prevent the high-temperature and high-pressure gas from flowing back through the air passage, and it is possible to obtain a highly reliable metal closed switchgear for preventing discharge to the periphery of the panel.

この発明の実施の形態１による金属閉鎖型スイッチギヤの内部構成を示す側面図である。It is a side view which shows the internal structure of the metal closed type switchgear by Embodiment 1 of this invention. この発明の実施の形態１における逆止弁式フラッパーの取付状態を示す拡大側面図である。It is an enlarged side view which shows the attachment state of the non-return valve type flapper in Embodiment 1 of this invention. この発明の実施の形態１における前面から見た逆止弁式フラッパーの取付状態を示す拡大正面図である。It is an enlarged front view which shows the attachment state of the non-return valve type flapper seen from the front surface in Embodiment 1 of this invention. この発明の実施の形態１におけるラッチを示す拡大図である。It is an enlarged view which shows the latch in Embodiment 1 of this invention. この発明の実施の形態１におけるラッチの動作説明図である。It is operation | movement explanatory drawing of the latch in Embodiment 1 of this invention. この発明の実施の形態２による金属閉鎖型スイッチギヤの内部構成を示す側面図である。It is a side view which shows the internal structure of the metal closed type switchgear by Embodiment 2 of this invention. この発明の実施の形態３による金属閉鎖型スイッチギヤの内部構成を示す側面図である。It is a side view which shows the internal structure of the metal closed type switchgear by Embodiment 3 of this invention. この発明の実施の形態４による金属閉鎖型スイッチギヤの内部構成を示す側面図である。It is a side view which shows the internal structure of the metal closed type switchgear by Embodiment 4 of this invention. この発明の実施の形態４における前面側の逆止弁式フラッパーの取付状態を示す拡大側面図である。It is an enlarged side view which shows the attachment state of the non-return valve type flapper of the front side in Embodiment 4 of this invention. この発明の実施の形態４における前面から見た前面側の逆止弁式フラッパーの取付状態を示す拡大正面図である。It is an enlarged front view which shows the attachment state of the non-return valve type flapper of the front side seen from the front in Embodiment 4 of this invention. 二つの逆止弁式フラッパーを用いた気流経路の一例を示す模式図である。It is a schematic diagram which shows an example of the airflow path | route using two check valve type flappers. 二つの逆止弁式フラッパーを用いた気流経路の他の例を示す模式図である。It is a schematic diagram which shows the other example of the airflow path | route using two check valve type flappers. ラッチの変形例を示す図である。It is a figure which shows the modification of a latch. ラッチの他の変形例を示す図である。It is a figure which shows the other modification of a latch.

実施の形態１.
図１ないし図４は、本発明を実施するための実施の形態１における金属閉鎖型スイッギヤを示すものである。図１は金属閉鎖型スイッチギヤの内部構成を示す側面図、図２は逆止弁式フラッパーの取付状態を示す拡大側面図で、図３は前面から見た逆止弁式フラッパーの取付状態を示す拡大正面図、図４(ａ)はラッチ機構の上面拡大図、図４(ｂ)はその側面拡大図である。Embodiment 1.
1 to 4 show a metal closed type switchgear according to Embodiment 1 for carrying out the present invention. FIG. 1 is a side view showing an internal configuration of a metal closed type switchgear, FIG. 2 is an enlarged side view showing a mounting state of a check valve type flapper, and FIG. 3 shows a mounting state of the check valve type flapper as viewed from the front. FIG. 4A is an enlarged top view of the latch mechanism, and FIG. 4B is an enlarged side view thereof.

図１において、金属閉鎖型スイッチギヤの箱体１の前半部の上段には、接地金属隔壁５ａと５ｃで囲まれ、遮断器６を収納した遮断器室２が区画されている。また、遮断器室２の後方には、接地金属隔壁５ａと５ｂで囲まれ、絶縁物で支持された三相交流用の母線８と、母線８に対応して３本設置された分岐導体９とを収容した母線室４が区画されている。
前記各母線８は前記分岐導体９を介して前記遮断器６の上段側主回路端子６ａにそれぞれ接続されている。前記母線室４の下段には、接地金属隔壁５ｂと５ｃで囲まれ、三相交流用のケーブル７を収容したケーブル室３が区画されている。前記ケーブル７は一端が接続導体３６を介して前記遮断器６の下段側主回路端子６ｂに接続され、他端が外部ケーブル（図示せず）へ接続されている。In FIG. 1, a circuit breaker chamber 2 that encloses a circuit breaker 6 is defined in the upper half of the front half of the box 1 of the metal closed switchgear and surrounded by ground metal partition walls 5a and 5c. Further, behind the circuit breaker chamber 2, a three-phase AC bus 8 surrounded by ground metal partition walls 5 a and 5 b and supported by an insulator, and three branch conductors 9 corresponding to the bus 8 are installed. A bus bar room 4 is stored.
Each bus 8 is connected to the upper main circuit terminal 6 a of the circuit breaker 6 through the branch conductor 9. A cable chamber 3 that encloses a cable 7 for three-phase alternating current and is surrounded by ground metal partition walls 5b and 5c is defined in the lower part of the bus bar chamber 4. One end of the cable 7 is connected to the lower main circuit terminal 6b of the circuit breaker 6 via a connecting conductor 36, and the other end is connected to an external cable (not shown).

また、前記母線室４の後方には接地金属隔壁５ｂと箱体の裏面板で囲まれ、前記箱体１の天井部の開口部と前記ケーブル室３とを連通する放圧ダクト３５が区画されている。前記放圧ダクト３５の上方開口部には、一辺が塑性変形部で支持され、高圧力の作用時に塑性変形部が変形し上方に開く放圧フラッパー１５が設置されており、前記ケーブル室３の内圧上昇時に高温高圧ガスを前記箱体１の上部へ放出する。また、前記箱体１の前面には、遮断器室２に対応して遮断器室扉１０が設けられている。この遮断器室扉１０の下には、通気可能で小動物や雨水の侵入は防止する防噴流型ギャラリーがはめ込まれた換気用の通気口１１が設けられている。 Further, a pressure release duct 35 is defined behind the bus bar chamber 4 and surrounded by a ground metal partition wall 5b and a back plate of the box, and communicates the opening of the ceiling of the box 1 and the cable chamber 3. ing. In the upper opening portion of the pressure release duct 35, a pressure release flapper 15 is installed, one side of which is supported by a plastic deformation portion, and the plastic deformation portion is deformed and opened upward when a high pressure is applied. When the internal pressure rises, the high-temperature and high-pressure gas is discharged to the upper portion of the box 1. A circuit breaker chamber door 10 is provided on the front surface of the box 1 corresponding to the circuit breaker chamber 2. Under the circuit breaker compartment door 10, there is provided a ventilation vent 11 fitted with a jet-proof gallery that can ventilate and prevent entry of small animals and rainwater.

また、前記遮断器室２の下段には、接地金属隔壁５ｃと箱体１の底板で囲まれた通気路１２が形成され、前記通気口１１と前記ケーブル室３とを連通している。この通気路１２の概中央部には、開口部３３ａを有する仕切板１７ａが設けられており、その開口部３３ａに図３に示すように複数のスリットを有する風窓３４ａがはめ込まれている。前記仕切板１７ａのケーブル室３側には、後述する逆止弁式フラッパー１３ａと、この逆止弁式フラッパー１３ａの閉成位置に設けられた一対のラッチ１４すなわちラッチ機構が取り付けられている。 A vent passage 12 surrounded by a ground metal partition wall 5c and a bottom plate of the box 1 is formed in the lower stage of the circuit breaker chamber 2, and the vent hole 11 and the cable chamber 3 communicate with each other. A partition plate 17a having an opening 33a is provided at a substantially central portion of the air passage 12, and an air window 34a having a plurality of slits is fitted into the opening 33a as shown in FIG. A check valve flapper 13a, which will be described later, and a pair of latches 14 provided at the closed position of the check valve flapper 13a, that is, a latch mechanism, are attached to the cable chamber 3 side of the partition plate 17a.

以下、前記逆止弁式フラッパー１３ａを図２及び図３を用いて説明する。前記逆止弁フラッパー１３ａの一端は、前記仕切板１７ａの後面側の上部に取り付けたＬ字部材に固定された支持ピン１８ａにより回動自在に支持されている。前記逆止弁式フラッパー１３ａの他端は、前記通気路１２の底面に設置したＬ字部材の一端に取り付けた板バネ１６に係合して、図２のように通気路１２の開放位置に保持されている。そして、その左右両側には閉成位置において前記ラッチ１４に係合するＬ字形のストッパー１９ａが取り付けられている。また、前記逆止弁式フラッパー１３ａは、その開口面が前記仕切板１７ａの方を向く断面Ｕ字状をなし、しかも前記仕切板１７ａの開口部３３ａより幅広に形成されている。 Hereinafter, the check valve flapper 13a will be described with reference to FIGS. One end of the check valve flapper 13a is rotatably supported by a support pin 18a fixed to an L-shaped member attached to the upper part of the rear side of the partition plate 17a. The other end of the check valve flapper 13a is engaged with a leaf spring 16 attached to one end of an L-shaped member installed on the bottom surface of the air passage 12, so that the air passage 12 is opened as shown in FIG. Is retained. On both the left and right sides, L-shaped stoppers 19a that engage with the latch 14 in the closed position are attached. Further, the check valve flapper 13a has a U-shaped cross section with the opening surface facing the partition plate 17a, and is wider than the opening 33a of the partition plate 17a.

次に、前記ラッチ１４を図４を用いて説明する。一対のラッチ１４は、図４に示すように球体の一部を切り欠いた進退自在な球形状のラッチピン２３すなわち係止部材と、このラッチピン２３を上方向に付勢する復帰バネ２４と、これらを収容するラッチケース２０とから構成されており、逆止弁式フラッパー１３ａの閉成動作に応動してラッチピン２３は復帰バネ２４の作用により上下方向に往復動を行う。また、前記ラッチケース２０は、ラッチピン２３が初期の位置より上に移動することを防止するために、ラッチピン２３の切り欠き面の中心を通り、切り欠き面に垂直な断面形状よりわずかに小さい開口部を有する。このように構成されたラッチ１４は、前記仕切板１７ａの開口部３３ａの周縁に取付けられた一対のラッチ設置用フレーム２１上にそれぞれ設置され、ラッチピン２３の切り欠き面が前記仕切板１７ａの方を向き、前記ストッパー１９ａに係合するように２つ配置される。 Next, the latch 14 will be described with reference to FIG. As shown in FIG. 4, the pair of latches 14 includes a spherical latch pin 23, that is, a locking member that is movable forward and backward, and a return spring 24 that urges the latch pin 23 upward, The latch pin 23 reciprocates vertically by the action of the return spring 24 in response to the closing operation of the check valve flapper 13a. The latch case 20 has an opening slightly smaller than the cross-sectional shape perpendicular to the notch surface passing through the center of the notch surface of the latch pin 23 in order to prevent the latch pin 23 from moving above the initial position. Part. The latches 14 thus configured are respectively installed on a pair of latch installation frames 21 attached to the peripheral edge of the opening 33a of the partition plate 17a, and the notch surfaces of the latch pins 23 are directed toward the partition plate 17a. Two are arranged so as to face and engage with the stopper 19a.

次に動作を説明する。上記のように構成された金属閉鎖型スイッチギヤは、外気を通気口１１より通気路１２を介して取り入れることにより、ケーブル室３の換気を行い、逆止弁式フラッパー１３ａは板バネ１６により、図２のように通気路１２の開放位置に保持されており、放圧フラッパー１５は閉じている。 Next, the operation will be described. The metal closed switchgear configured as described above ventilates the cable chamber 3 by taking outside air from the vent 11 through the vent passage 12, and the check valve flapper 13a is As shown in FIG. 2, the air passage 12 is held at the open position, and the pressure release flapper 15 is closed.

この状態において、例えば、ケーブル室３内のケーブル７でアークが発生した場合、前記ケーブル室３内の空気はアークの熱により高温高圧ガスとなり膨張する。このため、前記ケーブル室３の内圧が上昇し、箱体天井部の放圧フラッパー１５が開放され、前記ケーブル室３内の高温高圧ガスが放圧ダクト３５を通じて放出される。
これと同時に、前記ケーブル室３内の内圧が上昇することによって前記通気路１２に設置された逆止弁式フラッパー１３ａの他端が板バネ１６から外れ、図２に示すような点線位置に回動して前記通気路１２を閉塞する。In this state, for example, when an arc is generated in the cable 7 in the cable chamber 3, the air in the cable chamber 3 becomes a high-temperature and high-pressure gas and expands due to the heat of the arc. For this reason, the internal pressure of the cable chamber 3 rises, the pressure release flapper 15 at the box ceiling is opened, and the high-temperature and high-pressure gas in the cable chamber 3 is released through the pressure release duct 35.
At the same time, as the internal pressure in the cable chamber 3 rises, the other end of the check valve flapper 13a installed in the air passage 12 is detached from the leaf spring 16 and rotated to the dotted line position as shown in FIG. The air passage 12 is closed by moving.

この時、前記逆止弁式フラッパー１３ａは仕切板１７ａに衝突しその反動による反転動作をラッチ１４によって阻止することが出来る。図５はこの時の逆止弁式フラッパー及びラッチの動作説明図である。逆止弁式フラッパー１３ａは、図５（ａ）の開放位置から図５（ｃ）に示す閉成位置に移動する。この閉成動作中において図５（ｂ）に示すように逆止弁式フラッパー１３ａの他端とラッチピン２３の球状部との係合によりラッチ１４のラッチピン２３が復帰バネ２４の縮む方向に押しつけられる。そして、逆止弁式フラッパー１３ａが図５（ｃ）に示す閉成位置に移動するとラッチ１４のラッチピン２３が復帰バネ２４により初期の位置に戻り、逆止弁式フラッパー１３ａのストッパー１９ａがラッチピン２３の切り欠き面に引っかかり、逆止弁式フラッパー１３ａの反転動作を防ぐことが出来る。 At this time, the check valve flapper 13a collides with the partition plate 17a, and the reversing operation due to the reaction can be prevented by the latch 14. FIG. 5 is an explanatory view of the operation of the check valve type flapper and the latch at this time. The check valve flapper 13a moves from the open position shown in FIG. 5A to the closed position shown in FIG. During this closing operation, the latch pin 23 of the latch 14 is pressed in the direction in which the return spring 24 contracts due to the engagement between the other end of the check valve flapper 13a and the spherical portion of the latch pin 23 as shown in FIG. . When the check valve flapper 13a moves to the closed position shown in FIG. 5C, the latch pin 23 of the latch 14 is returned to the initial position by the return spring 24, and the stopper 19a of the check valve flapper 13a is latched to the latch pin 23. It is possible to prevent the check valve flapper 13a from reversing.

ここで、前記逆止弁式フラッパー１３ａの形状としては断面Ｕ字状としたが、板状のもであっても良い。また、ラッチ１４のラッチピン２３は図１３に示すように角柱を斜めに切断した角柱ラッチピン２５を用いても良い。この場合は、角柱ラッチケース２９は角柱ラッチピン２５が初期の位置より上に移動することを防止するために、角柱の水平断面形状よりわずかに小さい開口部を有する。同様に、図１４に示すように円柱を斜めに切断した円柱ラッチピン３１を用いても良い。この場合は、円柱ラッチケース３２は円柱ラッチピン３１が初期の位置より上に移動することを防止するために、円柱の水平断面形状よりわずかに小さい開口部を有する。 Here, the check valve flapper 13a has a U-shaped cross section, but may have a plate shape. The latch pin 23 of the latch 14 may be a prism latch pin 25 obtained by obliquely cutting a prism as shown in FIG. In this case, the prism latch case 29 has an opening that is slightly smaller than the horizontal cross-sectional shape of the prism to prevent the prism latch pin 25 from moving above its initial position. Similarly, as shown in FIG. 14, a cylindrical latch pin 31 obtained by obliquely cutting a cylinder may be used. In this case, the cylindrical latch case 32 has an opening that is slightly smaller than the horizontal cross-sectional shape of the cylinder in order to prevent the cylindrical latch pin 31 from moving above its initial position.

上記実施の形態によれば、区画室内の内圧上昇に応動して通気路１２を閉塞する逆止弁式フラッパー１３ａの閉成位置に設けられたラッチ１４により、逆止弁式フラッパー１３ａの閉成動作中に前記閉成位置からの反転を阻止することにより、高温高圧ガスが通気路１２を逆流するのを防げ、盤周囲へ高温高圧ガスが放出するのを未然に防止出来、盤周囲への放出防止に対する信頼性を向上出来る。 According to the above-described embodiment, the check valve flapper 13a is closed by the latch 14 provided at the closing position of the check valve flapper 13a that closes the air passage 12 in response to an increase in internal pressure in the compartment. By preventing reversal from the closed position during operation, it is possible to prevent the high-temperature and high-pressure gas from flowing back through the air passage 12, and to prevent the high-temperature and high-pressure gas from being released to the periphery of the panel. Reliability for emission prevention can be improved.

また、ラッチ１４を進退自在なラッチピン２３とラッチケース２０及び復帰バネ２４とから構成し、逆止弁式フラッパー１３ａの閉成動作に連動してラッチピン２３は上下方向に往復動を行うようにしたので、簡単な構造で逆止弁式フラッパー１３ａの閉成時の反動による反転動作を阻止出来る。 In addition, the latch 14 includes a latch pin 23 that can be moved back and forth, a latch case 20, and a return spring 24. The latch pin 23 reciprocates in the vertical direction in conjunction with the closing operation of the check valve flapper 13a. Therefore, it is possible to prevent the reversing operation due to the recoil when the check valve flapper 13a is closed with a simple structure.

実施の形態２．
図６はこの発明の実施の形態２に係わる金属閉鎖型スイッチギヤの内部構成を示す側面図である。なお、図１と同一符号は、同一または相当部分を示している。図６に示すように通気口を箱体１の背面に設け、背面通気口２２の盤内面に前記実施の形態１と同様な逆止弁式フラッパー１３ａとラッチ１４を設けたものである。Embodiment 2. FIG.
6 is a side view showing an internal configuration of a metal closed switchgear according to Embodiment 2 of the present invention. The same reference numerals as those in FIG. 1 indicate the same or corresponding parts. As shown in FIG. 6, a vent is provided on the back of the box 1 and a check valve flapper 13a and a latch 14 similar to those of the first embodiment are provided on the inner surface of the back vent 22.

本実施の形態において、ケーブル室３内の内圧が上昇した場合には、上記実施の形態１と同様に逆止弁式フラッパー１３ａの他端が板バネ１６から外れ、図６に示すような点線位置に回動して背面通気口２２を閉塞する。
この時、前記逆止弁式フラッパー１３ａは箱体１の裏面板に衝突し、その反動による反転動作をラッチ１４によって阻止することが出来る。In the present embodiment, when the internal pressure in the cable chamber 3 rises, the other end of the check valve flapper 13a comes off from the leaf spring 16 as in the first embodiment, and a dotted line as shown in FIG. The rear vent 22 is closed by rotating to the position.
At this time, the check valve flapper 13a collides with the back plate of the box 1, and the latch 14 can prevent the reversing operation due to the reaction.

上記実施の形態によれば、箱体１の背面側に背面通気口２２を設け、その通気口２２の盤内面側に逆止弁式フラッパー１３ａとラッチ１４を設け、逆止弁式フラッパー１３ａの閉成動作中に前記閉成位置からの反転を阻止することにより、高温高圧ガスが前記背面通気口２２から逆流するのを防げ、盤背面へ高温高圧ガスが放出するのを防止出来、盤背面への放出防止に対する信頼性を向上出来る。更には、ケーブル室３に直接通気口を設けたことにより、通気経路を短く出来より効率的な換気が出来る。 According to the above embodiment, the rear vent 22 is provided on the back side of the box 1, the check valve flapper 13 a and the latch 14 are provided on the inner surface of the vent 22, and the check valve flapper 13 a By preventing reversal from the closed position during the closing operation, it is possible to prevent the high temperature and high pressure gas from flowing backward from the rear vent 22 and to prevent the high temperature and high pressure gas from being released to the back of the panel. The reliability for preventing release into the can be improved. Furthermore, by providing a ventilation port directly in the cable chamber 3, the ventilation path can be shortened and more efficient ventilation can be achieved.

実施の形態３．
図７はこの発明の実施の形態３に係わる金属閉鎖型スイッチギヤの内部構成示す側面図である。なお、図１と同一符号は、同一または相当部分を示している。図７に示すように通気路１２中に上記実施の形態1と同様な逆止弁式フラッパー１３ａとラッチ１４を前後に設けたものである。Embodiment 3 FIG.
FIG. 7 is a side view showing the internal configuration of a metal closed switchgear according to Embodiment 3 of the present invention. The same reference numerals as those in FIG. 1 indicate the same or corresponding parts. As shown in FIG. 7, a check valve flapper 13a and a latch 14 similar to those in the first embodiment are provided in the air passage 12 at the front and rear.

本実施の形態において、ケーブル室３内の内圧が上昇した場合には、上記実施の形態１と同様に後面側の逆止弁式フラッパー１３ａの他端が板バネ１６から外れ、閉成位置に回動して通気路１２を閉塞する。この時、前記後面側の逆止弁式フラッパー１３ａは仕切板１７ａに衝突し、その反動による反転動作をラッチ１４によって阻止することが出来る。しかし、高温高圧ガスは高速で進むため、前記後面側の前記逆止弁式フラッパー１３ａによって通気路１２が閉塞される前に高温高圧ガスが前記通気路１２を逆流した場合には、前面側の前記逆止弁式フラッパー１３ａの他端が板バネ１６から外れ、閉成位置に回動して通気路１２を更に閉塞する。 In the present embodiment, when the internal pressure in the cable chamber 3 rises, the other end of the check valve flapper 13a on the rear surface side comes off from the leaf spring 16 in the closed position as in the first embodiment. The air passage 12 is closed by rotating. At this time, the check valve flapper 13a on the rear side collides with the partition plate 17a, and the reversing operation due to the reaction can be prevented by the latch 14. However, since the high-temperature and high-pressure gas travels at a high speed, if the high-temperature and high-pressure gas flows back through the air passage 12 before the air passage 12 is closed by the check valve flapper 13a on the rear surface side, The other end of the check valve flapper 13a is disengaged from the leaf spring 16 and pivots to the closed position to further close the ventilation path 12.

この時も、前面側の前記逆止弁式フラッパー１３ａは前記仕切板１７ａに衝突し、その反動による反転動作をラッチ１４によって阻止することが出来る。ただし、後面側の前記逆止弁式フラッパー１３ａで高温高圧ガスの圧力が十分減じられていれば前面側の逆止弁式フラッパー１３ａが作動することが無くても、盤周囲への高温高圧ガスの放出を未然に防止出来る。 Also at this time, the check valve flapper 13a on the front side collides with the partition plate 17a, and the reversing operation due to the reaction can be prevented by the latch 14. However, if the pressure of the high-temperature and high-pressure gas is sufficiently reduced by the check valve flapper 13a on the rear side, the high-temperature and high-pressure gas to the periphery of the panel can be obtained even if the check valve flapper 13a on the front side does not operate. Can be prevented in advance.

上記実施の形態によれば、通気路１２中に逆止弁式フラッパー１３ａとラッチ１４を前後に設けたことにより、より確実に高温高圧ガスが通気路１２を逆流するのを防げ、盤周囲へ高温高圧ガスが放出するのを防止出来、盤周囲への放出防止に対する信頼性を更に向上出来る。 According to the above-described embodiment, the check valve flapper 13a and the latch 14 are provided in the front and rear in the air passage 12, thereby preventing the high-temperature and high-pressure gas from flowing back through the air passage 12 more reliably and to the periphery of the panel. The high temperature and high pressure gas can be prevented from being released, and the reliability for preventing the release to the periphery of the panel can be further improved.

実施の形態４
図８はこの発明の実施の形態４に係わる金属閉鎖型スイッチギヤの内部構成を示す側面図である。なお、図７と同一符号は、同一または相当部分を示している。図８に示すように通気路１２中に上記の実施の形態１と同様な逆止弁式フラッパー１３ａと、これとは支持ピンの位置が上下逆転した逆止弁式フラッパー１３ｂを設けたものである。Embodiment 4
FIG. 8 is a side view showing an internal configuration of a metal closed switchgear according to Embodiment 4 of the present invention. Note that the same reference numerals as those in FIG. 7 indicate the same or corresponding parts. As shown in FIG. 8, a check valve flapper 13a similar to that of the first embodiment is provided in the air passage 12, and a check valve flapper 13b in which the position of the support pin is vertically reversed is provided. is there.

詳細には、前面側の逆止弁式フラッパー１３ｂが、仕切板１７ｂの下部に支持ピン１８ｂで支持され、後面側の逆止弁式フラッパー１３ａが仕切板１７ａの上部に支持ピン１８ａで支持されており、それぞれの支点が互い違いになっている。そして、前記前面側の逆止弁式フラッパー１３ｂは図９及び図１０に示すように通常は箱体の左右内側面に渡されたＬ字部材の支持フレーム２６で支持される。前記前面側の逆止弁式フラッパー１３ｂに対応して設けられたラッチ１４は、仕切板１７ｂの開口部３３ｂの周縁に取り付けられたラッチ設置用フレーム２１の下に設置され、ラッチピン２３の切り欠き面が仕切板１７ｂの方を向き、前記逆止弁式フラッパー１３ｂの左右両端の上部に係合するように２つ配置される。なお、後面側の逆止弁式フラッパー１３ａに対応するラッチ１４は、上記各実施の形態と同様に配置されている。 Specifically, the front-side check valve flapper 13b is supported by a support pin 18b below the partition plate 17b, and the rear-side check valve flapper 13a is supported by a support pin 18a above the partition plate 17a. Each fulcrum is staggered. The check valve flapper 13b on the front side is normally supported by a support frame 26 of an L-shaped member passed to the left and right inner surfaces of the box as shown in FIGS. The latch 14 provided corresponding to the check valve flapper 13b on the front side is installed under the latch installation frame 21 attached to the peripheral edge of the opening 33b of the partition plate 17b. Two surfaces are arranged so that the surfaces face the partition plate 17b and engage with the upper portions of the left and right ends of the check valve flapper 13b. Note that the latches 14 corresponding to the check valve flapper 13a on the rear side are arranged in the same manner as in the above embodiments.

本実施の形態において、ケーブル室３内の内圧が上昇した場合には、上記実施の形態３と同様に後面側の逆止弁式フラッパー１３ａの他端が板バネ１６から外れ、閉成位置に回動して通気路１２を閉塞する。この時、前記逆止弁式フラッパー１３ａは仕切板１７ａに衝突し、その反動による反転動作をラッチ１４によって阻止することが出来る。ここで、後面側の逆止弁式フラッパー１３ａで高温高圧ガスが十分減じられなければ前面側の逆止弁式フラッパー１３ｂが回動して通気路１２を更に閉塞する。ただし、後面側の前記逆止弁式フラッパー１３ａで高温高圧ガスの圧力が十分減じられていれば後面側の逆止弁式フラッパー１３ｂが作動することが無くても、盤周囲への高温高圧ガスの放出を未然に防止出来る。 In the present embodiment, when the internal pressure in the cable chamber 3 rises, the other end of the check valve flapper 13a on the rear surface side comes off from the leaf spring 16 in the closed position as in the third embodiment. The air passage 12 is closed by rotating. At this time, the check valve flapper 13a collides with the partition plate 17a, and the reversing operation due to the reaction can be prevented by the latch 14. Here, if the high-temperature and high-pressure gas is not sufficiently reduced by the check valve flapper 13a on the rear surface side, the check valve flapper 13b on the front surface rotates to further close the ventilation path 12. However, if the pressure of the high-temperature high-pressure gas is sufficiently reduced by the check valve flapper 13a on the rear side, the high-temperature high-pressure gas to the periphery of the panel can be obtained even if the check valve flapper 13b on the rear side does not operate Can be prevented in advance.

上記実施の形態によれば、通気路１２中に支点を上下逆にした逆止弁式フラッパー１３ａ，１３ｂとラッチ１４を設けたことにより、図１２に示すように、高温高圧ガスが盤周囲へ放出するまでの気流経路を図１１に示すような逆止弁式フラッパー１３ａの支点を同じ側にしたものと比べて長く取ることが出来る。このため、盤周囲へ高温高圧ガスが放出するのを防止出来、盤周囲への放出防止に対する信頼性を更に向上出来る。 According to the above-described embodiment, the check valve flappers 13a and 13b with the fulcrum upside down and the latch 14 are provided in the air passage 12, so that the high-temperature and high-pressure gas flows to the periphery of the panel as shown in FIG. The air flow path until discharge can be made longer than that of the check valve type flapper 13a as shown in FIG. For this reason, it is possible to prevent the high-temperature and high-pressure gas from being released to the periphery of the panel, and the reliability for preventing the release to the periphery of the panel can be further improved.

Claims (4)

高圧機器が収容された区画室を有する箱体、この箱体の一部に開口した通気口に連通して設けられ、前記区画室の換気を行う通気路、この通気路に設置され、前記区画室の内圧上昇に応動して前記通気路を閉塞する逆止弁式フラッパー及びこの逆止弁式フラッパーの閉成位置に設けられ、前記逆止弁式フラッパーの閉成動作中に前記閉成位置からの反転動作を阻止するラッチ機構を備えた金属閉鎖型スイッチギヤ。 A box having a compartment in which a high-pressure device is housed, a vent which is provided in communication with a vent opening opened in a part of the box, and which ventilates the compartment, and is installed in the vent. A check valve flapper that closes the air passage in response to an increase in the internal pressure of the chamber, and a closed position of the check valve flapper, and the closed position during the closing operation of the check valve flapper. Metal-closed switchgear with a latch mechanism that prevents reversal from moving. 請求項１に記載の金属閉鎖型スイッチギヤにおいて、ラッチ機構は逆止弁式フラッパーと係合する進退自在な係止部材を有することを特徴とする金属閉鎖型スイッチギヤ。 2. The metal closed switchgear according to claim 1, wherein the latch mechanism has a locking member that can be moved forward and backward to engage with the check valve flapper. 請求項１又は請求項２に記載の金属閉鎖型スイッチギヤにおいて、逆止弁式フラッパー及びラッチ機構は通気路中の前後に複数個設けたことを特徴とする金属閉鎖型スイッチギヤ。 3. The metal closed type switchgear according to claim 1 or 2, wherein a plurality of check valve type flappers and latch mechanisms are provided on the front and rear sides of the air passage. 請求項３に記載の金属閉鎖型スイッチギヤにおいて、逆止弁式フラッパーは、一端が回動自在に支持され、該支持点が互い違いであることを特徴とする金属閉鎖型スイッチギヤ。 4. The metal closed switchgear according to claim 3, wherein one end of the check valve type flapper is rotatably supported, and the support points are staggered.
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KR101111012B1 (en) 2012-02-13
CN101682178A (en) 2010-03-24

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