JPH0429635B2 - - Google Patents
Info
- Publication number
- JPH0429635B2 JPH0429635B2 JP23748184A JP23748184A JPH0429635B2 JP H0429635 B2 JPH0429635 B2 JP H0429635B2 JP 23748184 A JP23748184 A JP 23748184A JP 23748184 A JP23748184 A JP 23748184A JP H0429635 B2 JPH0429635 B2 JP H0429635B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- detonator
- electric
- bridge wire
- explosive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002360 explosive Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 10
- 238000004880 explosion Methods 0.000 description 8
- UZGLIIJVICEWHF-UHFFFAOYSA-N octogen Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)CN([N+]([O-])=O)C1 UZGLIIJVICEWHF-UHFFFAOYSA-N 0.000 description 7
- 208000005189 Embolism Diseases 0.000 description 6
- XTFIVUDBNACUBN-UHFFFAOYSA-N 1,3,5-trinitro-1,3,5-triazinane Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)C1 XTFIVUDBNACUBN-UHFFFAOYSA-N 0.000 description 5
- SPSSULHKWOKEEL-UHFFFAOYSA-N 2,4,6-trinitrotoluene Chemical compound CC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O SPSSULHKWOKEEL-UHFFFAOYSA-N 0.000 description 5
- 239000003814 drug Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000015 trinitrotoluene Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 229910052741 iridium Inorganic materials 0.000 description 4
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009863 impact test Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- TZRXHJWUDPFEEY-UHFFFAOYSA-N Pentaerythritol Tetranitrate Chemical compound [O-][N+](=O)OCC(CO[N+]([O-])=O)(CO[N+]([O-])=O)CO[N+]([O-])=O TZRXHJWUDPFEEY-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- BLNVKDFNYTZLMS-UHFFFAOYSA-N 2,2-dinitroethylurea Chemical compound NC(=O)NCC([N+]([O-])=O)[N+]([O-])=O BLNVKDFNYTZLMS-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000575 Ir alloy Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- AGUIVNYEYSCPNI-UHFFFAOYSA-N N-methyl-N-picrylnitramine Chemical group [O-][N+](=O)N(C)C1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O AGUIVNYEYSCPNI-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920003182 Surlyn® Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010102 embolization Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 125000000449 nitro group Chemical class [O-][N+](*)=O 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Paints Or Removers (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
（産業上の利用分野）
本発明は、土木砕石、石灰石、金属及び石炭鉱
山等において使用される爆薬を起爆する産業用電
気***に関するもので、作業現場における取扱い
の安全性向上及び電気***製造時の安全性向上が
得られる。
（従来の技術）
従来の電気***は、第２図に示すように金属管
体１に添装薬２および起爆薬３を設け内管４で起
爆薬３を包囲し、内管上部に必要に応じ延時薬５
を設置し、その上に粉状の点火薬６を設け、該点
火薬の中に電橋線７を埋没せしめたものであり、
電橋線７の加熱により点火薬６を着火させて、延
時薬５に点火し、起爆薬３を点火点爆させ添装薬
を爆轟させる方法である。
（発明が解決しようとする問題点）
従来の電気***は、電橋線に0.35Aの電流を通
電すると、約50％が発火する程、電気に対しては
敏感である。この性能は、使用現場に於ける不発
防止を確保するために、必要な敏感さではある
が、一方漏洩電流、雷及び電波による誘導電流、
または静電気による暴発の懸念があるので使用時
に種々の作業の制約を受ける。更に従来の電気雷
管は、火薬類の中でも最も鋭敏な点火薬を内包し
ているので、使用上及び製造上における安全面に
問題があつた。使用時においては、電気***をダ
イナマイト等の爆薬に挿入し親ダイとし、***孔
に、込棒で装填すると共に、砂及び粘土からなる
込物を填実する。このときに***孔内壁の肌荒
れ、岩粒等の存在により親ダイの装填及び込物の
填実が困難になることがあり、場合により親ダイ
中の電気***に強い衝撃が加わり、変形すること
がある。
この様な場合、一般に電気***の点火薬部が機
械強度的に最も弱いため集中的に変形、点火薬が
発火し、電気***が暴発する危険性がある。また
製造時においても鋭敏な点火薬を秤量及び填実す
る過程において絶えず不慮の発火等の危険性があ
る。
（問題点を解決するための手段）
本発明は、電気***を構成する火薬類の中で最
も鋭敏な点火薬を使用せずに電気***を点火出来
る構造を採用することにより、従来の電気***の
問題点を解決したもので、点火薬に替りトリニト
ロトルエン（TNT）ペンスリツト（PETN）ヘ
キソーゲン（RDX）及びシクロテトラメチレン
テトラニトラミン（HMX）等の添装薬と同程度
の鈍感さを有する爆薬を内壁に薄い層として被覆
したチユーブからなる導火管を使用することによ
り、使用上及び製造上における安全性を向上さ
せ、これと同時に電橋線を線爆発させて添装薬と
同程度の鈍感さを有する爆薬であつても完全に爆
発させることにより電気***としての性能を維持
させたものである。
すなわち、本発明は、
(1) 電橋線を大電流により線爆発させて、電橋線
と原料***（添装薬、起爆薬を装填し必要に応
じ延時薬を挿入した***）の間の点火部として
内壁が薄い層の爆薬で被覆されたチユーブから
なる導火管を使用した電気***の薄層爆薬を点
火させ、これによつて***を起爆することを特
徴とする電気***の起爆方法。
(2) 電橋線と原料***の間の点火部として内壁が
薄い層の爆薬で被覆されたチユーブからなる導
火管を使用したことを特徴とする電気***。
である。
本発明に使用する内壁が薄い層の爆薬で被覆さ
れたチユーブからなる導火管は、例えば特公昭49
−12699号公報に記載されたもので、薄層爆薬と
しては、ペンスリツト（PETN）、ヘキソーゲン
（RDX）、シクロテトラメチレンテトラニトラミ
ン（HMX）、ジニトロエチル尿素、トリニトロ
トルエン（TNT）等が使用され、チユーブは柔
軟性のある樹脂が使用されるが、金属でも構わな
い。又特開昭55−37487号公報に示されているよ
うに薄層爆薬として、HMXとアルミニウム粉の
比率を91：９の割合に混合したもの、チユーブに
ついてはデユポン社のサーリン1354、外径３mm、
内径1.5mmのチユーブを使用したものを使用でき
る。電気***に内包せしめる導火管の長さは、薄
層爆薬の至完爆距離及び電気***製造時の容易さ
から、５〜30mmの長さが好ましい。
本発明に使用する電橋線は、例えば金、銀、白
金、イリジウム、ニツケル、クロム、タングステ
ン等の金属及びその合金よりなるもので、好まし
くは、強度及び抵抗率から言つて、白金、イリジ
ウムの比が80：20の電気***に常用されている合
金である。電橋線の長さは0.3〜10mmが好ましく、
1.5〜2.0mmがより好ましい、電橋線の線径は5μよ
り細くなると、電橋線をリード線８に結合せしめ
ることが極めて困難であると共に300μを越える
と、電橋線の抵抗が小さくなり、線爆発を生ぜし
めることが困難であるので５〜300μの範囲が好
ましく上述の白金、イリジウム合金の場合は、抵
抗率との関係から15〜35μが最も好ましい。
本発明の電橋線の線爆発で、導火管内の薄層爆
薬を点火させる場合、電橋線に通電する電流の大
きさが重要な要因となる。
本発明でいう大電流の意味は、一般に電気***
の点火は数アンペアの電流で実施されているの
で、これに対し極めて大きい数百アンペア以上の
電流のことである。
電橋線の材質が白金：イリジウムの割合が80：
20、線径32μ、長さ1.5mmの場合は250アンペア以
上好ましくは500アンペア以上の電流で、導火管
内の薄層爆薬は点火されるので本発明の電橋線の
線爆発は、１個の本発明による電気***の場合、
従来の電気***の点火に使用されている通常の発
破器で500V以上の出力電圧を有し、コンデンサ
ー容量が30μF以上、あるいは800V以上で10μF以
上を有する発破器が使用出来る。
一方、1Vを越え100V以下の電圧では電橋線は
比較的大きい線爆発をおこすが線爆発のエネルギ
ーが充分でなく薄層爆薬に点火しない、従つて本
発明は、漏洩電流、静電気あるいは電波、高圧
線、雷等の誘導電流等により暴発しないというす
ぐれた特徴を有する。
次に本発余を図面に従つて更に具体的に説明す
る。
第１図は本発明の電気***の１例を示す断面図
であり、添装薬２、管爆薬３が装填され、その上
に必要に応じ内管４及び延時薬５を有した原料雷
管と塞栓９の先端の電橋線７との間に点火部とし
て内壁に薄層爆薬１１を被覆したチユーブ１２か
らなる導火管Ａを使用し、導火管は筒管１３で保
持されている。この電気***の起爆に当つては、
脚線１０に大電流を通し電橋線７を線爆発として
衝撃圧を発生させ、導火管Ａの内面に薄層で被覆
させた薄層爆薬１１を起爆させる。このとき導火
管Ａ内に被覆された爆薬１１は１ｍ当り20mgと極
めて少ないので、起爆されて、高温高速のガス衝
撃波が導火管Ａの中を伝播してもチユーブ１２及
び筒管１３は全く破壊されることはない。
この様にして、衝撃波は、約2000ｍ／ｓの速度
で延時薬５の薬面に到達し、延時薬を着火させ
る。
（作用）
本発明は大電流により線爆発をさせる電橋線と
内面に点火薬および起爆薬より安全な爆薬を薄層
に被覆せしめたチユーブからなる導火管とを組み
合わせることにより、発破作業現場での漏洩電
流、静電気、雷、高圧線および電波等からの誘導
電流等の電気的な要素に対する安全性を向上させ
ると共は、親ダイの装填時に掛かる衝撃摩擦、あ
るいは不発***の回収時に掛かる衝撃摩擦等の機
械的な要素に対する安全性を向上させた電気***
を供給することが出来る。
電気***の耐衝撃性が向上する理由について説
明する。
添装薬は起爆薬および点火薬のいずれに対して
も極めて鈍感である。一方起爆薬と点火薬は同程
度の鋭敏さを有するが、起爆薬は第１図及び第２
図に示す様に金属製の内管で保護されているの
で、電気***に外力が掛つた場合の変形が少な
く、従つて変形時の摩擦衝撃は殆んどないので、
比較的安全である。
しかるに、点火薬部については管体のみの容器
に内包されており、管体の変形耐力以上の衝撃が
電気***の軸と直角の方向に作用すると、点火薬
部は大きく内側に絞られ、このときの衝撃摩擦に
より点火薬が発火することがある。この他に、特
に電気***の軸方向に衝撃荷重が掛つたときに、
電気***はどの様な変形をするかを調べる為に
2.36Kgを地面に垂直に立てた電気***の上に落下
せしめた。その結果、重錘が塞栓部に接触すると
同時に、塞栓部が管体の中に喰込み、それが為
に、点火薬は段発電気***にあつては、塞栓と延
時薬との間で、瞬発電気***にあつては、塞栓と
内管との間で、急激に圧縮されて発火することが
判明している。
しかるに本発明によればチユーブ内面に薄層で
貼着された爆薬は、TNT、テトリル、ヘキソー
ゲン、HMX等の添装薬と同じ比較的鈍感な成分
のものもあるので、点火薬よりは安全である。こ
れと同時に、これらの薄層はチユーブ及び好まし
くは筒管で保護されるので、受ける衝撃も少ない
から、従来の点火薬より一層安全になる。
（実施例）
以下本発明の実施例を示す。
実施例 １
延時薬部を設置した原料***の中に、長さ21
mm、外径６mm、内径３mmのポリエチレン製の筒管
及びHMX91部、アルミ粉９部よりなる爆薬をチ
ユーブ内壁に１ｍ当り20mgを被覆させた、チユー
ブ外径３mm、内径1.5mmのデユポン社のサーリン
1354樹脂のチユーブとからなるニトロノーベル社
製のNONEL***用スターターの導火管で長さ10
mmに切断した導火管を第１図に示す構造で延時薬
５の上に設置した電橋線は、材質は白金：イリジ
ウムの比が80：20の合金で、線径32μ、長さが1.5
mmの電橋線を使用し、導火管の上端から１mmの位
置になる様に、塞栓を管体に固定した、このとき
の管体の全長は56mmである。電源としては、
700Vに充電した10μFのコンデンサーから丸型ビ
ニルコード1.25mm2の発破母線５ｍ（往復10ｍ）を
使用して80cmの脚線を通じて１個の電橋線に印荷
せしめた。
その結果、表−１に示す様に30回の試験で***
は全て爆発し、JISによる鉛板試験においても貫
通孔径は10.4mmで威力についても問題は見られな
かつた。
次いで本発明の電気***の機械的な耐衝撃性を
調べるため、鉄製アンビルの上に電気***を垂直
に立て、2.36Kgの重錘を200cmの高さから落下せ
しめ、落槌衝撃により爆発するかを見た。その結
果、10回の試験でいずれも発火しなかつた。
実施例 ２
他の条件は実施例１と同じであるが、筒管の長
さを26mm、導火管の長さ15mm、管体の長さを61mm
に設定し、電源として、500Vに充電した30μFの
コンデンサーを使用した。
その結果、表−１に示す様に30回の試験で***
は全て爆発し、JISによる鉛板試験、落槌衝撃試
験でも問題はなかつた。
実施例 ３
他の条件は実施例１と同じであるが、筒管の長
さ31mm、導火管の長さ20mm、管体の長さを66mmに
設定し、電源として、通常の発破器の日化精機(株)
製Ｔ−200（充電電圧1200V、コンデンサー容量
10μF）を使用し、発破母線として丸型ビニルコ
ード1.25mm2を30ｍ（往復60ｍ）を使用し、80cmの
脚線を介して１個の電橋線に印荷せしめた。その
結果、表−１に示す様に30回の試験で***は全て
爆発し、JISによる鉛板試験、落槌衝撃試験でも
問題はなかつた。
実施例 ４
実施例１に示す電気***を80cmの脚線及び丸型
ビニルコード1.25mm230ｍ（往復60ｍ）を介して
200V商用電源を印荷した。その結果は表−１に
示す様に電気***は30回の試験で全て発火しなか
つた。
比較例 １
第２図に示す従来の電気***を80cmの脚線及び
丸型ビニルコード1.25mm230ｍ（往復60ｍ）を介し
て、100V商用電源を印荷した。その結果は表−
２に示す様に30回の試験で全数暴発した。また落
槌衝撃試験でも10回の内４回が暴発した。
(Field of Industrial Application) The present invention relates to an industrial electric detonator for detonating explosives used in civil engineering, crushed stone, limestone, metal, coal mines, etc., and improves handling safety at work sites and during the production of electric detonators. Improved safety can be obtained. (Prior art) As shown in Fig. 2, a conventional electric detonator has a metal tube body 1 with an additive 2 and a detonator 3, an inner tube 4 surrounding the detonator 3, and an inner tube 4 with a charge 2 and a detonator 3 placed in the upper part of the inner tube. Adjournment medicine 5
is installed, a powdered ignition powder 6 is placed on it, and an electric bridge wire 7 is buried in the ignition powder,
This is a method in which the ignition charge 6 is ignited by heating the electric bridge wire 7, the delay charge 5 is ignited, the initiating charge 3 is ignited and the charge is detonated. (Problems to be Solved by the Invention) Conventional electric detonators are so sensitive to electricity that approximately 50% of them will ignite when a current of 0.35A is applied to the bridge wire. This performance is sensitive enough to ensure the prevention of misfires at the site of use, but it also prevents leakage currents, induced currents due to lightning and radio waves, etc.
Also, there are concerns about explosions due to static electricity, so there are restrictions on various operations when using the device. Furthermore, since conventional electric detonators contain ignition powder, which is the most sensitive of all explosives, there have been problems with safety in use and manufacture. When in use, an electric detonator is inserted into an explosive such as dynamite to serve as a parent die, and the blast hole is loaded with a charging rod and filled with a charge made of sand and clay. At this time, the roughness of the inner wall of the blast hole, the presence of rock particles, etc. may make it difficult to load the parent die and fill the charge, and in some cases, a strong impact may be applied to the electric detonator in the parent die, causing it to become deformed. There is. In such a case, since the ignition charge part of the electric detonator is generally the weakest in terms of mechanical strength, there is a risk that the detonator will be intensively deformed, the ignition charge will ignite, and the electric detonator will explode. Furthermore, during manufacturing, there is a constant risk of accidental ignition during the process of weighing and filling sensitive ignition powder. (Means for Solving the Problems) The present invention employs a structure in which the electric detonator can be ignited without using the most sensitive igniter among the explosives constituting the electric detonator. This is an explosive that solves the problem and has the same level of insensitivity as additives such as trinitrotoluene (TNT), pen slit (PETN), hexogen (RDX), and cyclotetramethylenetetranitramine (HMX), instead of ignition powder. By using a fuse tube consisting of a tube whose inner wall is coated with a thin layer of Even though the explosive is insensitive, it maintains its performance as an electric detonator by completely detonating it. That is, the present invention provides the following methods: (1) The bridge wire is detonated by a large current, and the detonator between the bridge wire and the raw detonator (a detonator loaded with an additive and a detonator and into which a delay charge is inserted as necessary) A method for detonating an electric detonator, characterized by igniting a thin layer explosive of an electric detonator using a tube consisting of a tube whose inner wall is coated with a thin layer of explosive as the ignition part, thereby detonating the detonator. . (2) An electric detonator characterized by using a fuse tube consisting of a tube whose inner wall is coated with a thin layer of explosive as the ignition part between the bridge wire and the raw material detonator. It is. The fuse tube used in the present invention is made of a tube whose inner wall is coated with a thin layer of explosives, for example.
-12699, and the thin film explosives used include PETN, hexogen (RDX), cyclotetramethylenetetranitramine (HMX), dinitroethyl urea, and trinitrotoluene (TNT). The tube is made of flexible resin, but may also be made of metal. In addition, as shown in Japanese Patent Application Laid-Open No. 55-37487, a thin layer explosive is prepared by mixing HMX and aluminum powder at a ratio of 91:9, and the tube is Surlyn 1354 manufactured by DuPont, with an outer diameter of 3 mm. ,
A tube with an inner diameter of 1.5 mm can be used. The length of the fuse contained in the electric detonator is preferably 5 to 30 mm in view of the maximum detonation distance of the thin-layer explosive and ease of manufacturing the electric detonator. The electric bridge wire used in the present invention is made of metals such as gold, silver, platinum, iridium, nickel, chromium, and tungsten, and alloys thereof. Preferably, platinum and iridium are used in terms of strength and resistivity. This is an alloy commonly used in electric detonators with a ratio of 80:20. The length of the electric bridge wire is preferably 0.3 to 10 mm,
A wire diameter of 1.5 to 2.0 mm is more preferable. If the wire diameter of the bridge wire becomes thinner than 5μ, it is extremely difficult to connect the bridge wire to the lead wire 8, and if it exceeds 300μ, the resistance of the bridge wire becomes small. Since it is difficult to cause a linear explosion, a range of 5 to 300 .mu. is preferable, and in the case of the above-mentioned platinum and iridium alloys, a range of 15 to 35 .mu. is most preferable from the viewpoint of resistivity. When igniting the thin layer explosive in the fuse in the wire explosion of the bridge wire of the present invention, the magnitude of the current flowing through the bridge wire is an important factor. In the present invention, large current means an extremely large current of several hundred amperes or more, since ignition of an electric detonator is generally carried out with a current of several amperes. The material of the electric bridge wire is platinum: iridium ratio is 80:
20. When the wire diameter is 32 μ and the length is 1.5 mm, the thin layer explosive in the fuse tube is ignited with a current of 250 amperes or more, preferably 500 amperes or more, so the wire explosion of the bridge wire of the present invention is In the case of an electric detonator according to the invention,
A normal blaster used to ignite a conventional electric detonator with an output voltage of 500V or more and a capacitor capacity of 30μF or more, or a blaster with a capacitance of 10μF or more at 800V or more can be used. On the other hand, at a voltage exceeding 1V and below 100V, the bridge wire will cause a relatively large wire explosion, but the energy of the wire explosion is insufficient and the thin layer explosive will not ignite. It has the excellent feature that it will not explode due to induced currents from high-voltage lines, lightning, etc. Next, the present invention will be explained in more detail with reference to the drawings. FIG. 1 is a cross-sectional view showing one example of the electric detonator of the present invention, in which a charge 2 and a tube explosive 3 are loaded, and a raw material detonator having an inner tube 4 and a time delay charge 5 as required. A fuse tube A consisting of a tube 12 whose inner wall is coated with a thin layer of explosive 11 is used as an ignition part between the bridge wire 7 at the tip of the embolus 9, and the fuse tube is held by a cylinder tube 13. When detonating this electric detonator,
A large current is passed through the leg wire 10 to cause the bridge wire 7 to explode as a line to generate shock pressure, and the thin layer explosive 11 coated with a thin layer on the inner surface of the fuse tube A is detonated. At this time, the amount of explosive 11 coated in the fuse tube A is extremely small at 20 mg per 1 m, so even if it is detonated and a high-temperature, high-velocity gas shock wave propagates inside the fuse tube A, the tube 12 and the cylindrical pipe 13 are It cannot be destroyed at all. In this way, the shock wave reaches the drug surface of the time-prolonging medicine 5 at a speed of about 2000 m/s and ignites the time-prolonging medicine. (Function) The present invention combines an electric bridge wire that causes wire explosion with a large current and a fuse tube consisting of a tube whose inner surface is coated with a thin layer of explosives that are safer than igniters and primers. In addition to improving safety against electrical elements such as leakage current, static electricity, lightning, induced current from high-voltage lines, and radio waves, etc., it also improves safety against electrical elements such as leakage current, static electricity, lightning, induced current from high-voltage lines, radio waves, etc. It is possible to supply an electric detonator with improved safety against mechanical factors such as impact friction. The reason why the impact resistance of electric detonators is improved will be explained. The loading charge is extremely insensitive to both the priming charge and the ignition charge. On the other hand, the detonator and the igniter have the same degree of sensitivity, but the detonator is
As shown in the figure, since it is protected by a metal inner tube, there is little deformation when an external force is applied to the electric detonator, and there is almost no frictional impact when deformed.
Relatively safe. However, the ignition powder part is contained in a container consisting only of a tube body, and when an impact greater than the deformation resistance of the tube body acts in a direction perpendicular to the axis of the electric detonator, the ignition powder part is greatly squeezed inward and this The ignition powder may ignite due to the impact friction caused by the explosion. In addition, especially when a shock load is applied in the axial direction of the electric detonator,
To find out how an electric detonator deforms
A 2.36Kg bomb was dropped onto an electric detonator that was placed vertically on the ground. As a result, as soon as the weight comes into contact with the embolus part, the embolus part bites into the tube body, and as a result, in the case of a staged electric detonator, the ignition charge is transferred between the embolus and the delay charge. In the case of instantaneous electric detonators, it has been found that the embolus and the inner tube are rapidly compressed and ignited. However, according to the present invention, the explosive adhered in a thin layer to the inner surface of the tube is safer than ignition powder, as it contains relatively insensitive components such as TNT, tetryl, hexogen, HMX, and other additives. be. At the same time, since these thin layers are protected by a tube and preferably a barrel, they are subjected to less impact, making them safer than conventional igniters. (Example) Examples of the present invention will be shown below. Example 1 In the raw material detonator equipped with a time-delaying part, a length of 21
Dupont's Surlin tube with an outer diameter of 3 mm and an inner diameter of 1.5 mm, with a tube made of polyethylene with an outer diameter of 6 mm and an inner diameter of 3 mm, and an explosive consisting of 91 parts of HMX and 9 parts of aluminum powder coated on the inner wall of the tube at a dose of 20 mg per meter.
Nitro Nobel NONEL detonator starter fuse tube made of 1354 resin tube and length 10
The electric bridge wire, which has the structure shown in Fig. 1 and is made of a fuse tube cut into mm pieces and installed on the time extension 5, is made of an alloy with a platinum:iridium ratio of 80:20, has a wire diameter of 32μ, and a length of 1.5
The embolus was fixed to the tube at a position 1 mm from the upper end of the fuse using a 3.0 mm electric bridge wire, and the total length of the tube at this time was 56 mm. As a power source,
A 10μF capacitor charged to 700V was charged to one electric bridge wire through an 80cm leg wire using a 5m blasting bus (10m round trip) of 1.25mm2 round vinyl cord. As a result, as shown in Table 1, all detonators exploded after 30 tests, and even in the lead plate test according to JIS, the through hole diameter was 10.4 mm, and no problems were found in terms of power. Next, in order to examine the mechanical impact resistance of the electric detonator of the present invention, the electric detonator was placed vertically on a steel anvil, and a 2.36 kg weight was dropped from a height of 200 cm to see if it would explode due to the impact of a falling hammer. saw. As a result, no fire occurred in any of the 10 tests. Example 2 Other conditions were the same as in Example 1, except that the length of the tube was 26 mm, the length of the fuse tube was 15 mm, and the length of the tube body was 61 mm.
A 30μF capacitor charged to 500V was used as the power source. As a result, as shown in Table 1, all detonators exploded after 30 tests, and there were no problems in the JIS lead plate test or drop hammer impact test. Example 3 The other conditions were the same as in Example 1, but the length of the tube was set to 31 mm, the length of the fuse tube was set to 20 mm, and the length of the tube body was set to 66 mm. Nikka Seiki Co., Ltd.
Manufactured by T-200 (charging voltage 1200V, capacitor capacity
A round vinyl cord of 1.25 mm 2 was used for 30 m (60 m round trip) as a blasting bus bar, and was applied to one electric bridge wire via an 80 cm leg wire. As a result, as shown in Table 1, all detonators exploded after 30 tests, and there were no problems in the JIS lead plate test or drop hammer impact test. Example 4 The electric detonator shown in Example 1 was connected via an 80 cm leg line and a round vinyl cord of 1.25 mm 2 30 m (60 m round trip).
A 200V commercial power supply was installed. As shown in Table 1, the electric detonator did not ignite in all 30 tests. Comparative Example 1 A 100V commercial power source was applied to the conventional electric detonator shown in FIG. 2 through an 80cm leg line and a 1.25mm 2 30m round vinyl cord (60m round trip). The results are shown in the table-
As shown in Figure 2, all of the cases exploded after 30 tests. Also, in the drop hammer impact test, the product exploded 4 out of 10 times.
【表】
分母は試料数、分子は発火数
[Table] The denominator is the number of samples, the numerator is the number of firings
【表】
分母は試料数、分子は発火数
（発明の効果）
(1) 従来品に比し耐衝撃性が優れている。
(2) 漏洩電流、静電気、誘導電流等に対して、従
来品より優れている。
(3) 鋭敏な点火薬を使用していないので製造上も
安全である。
(4) 以上の様な性能を有するため、使用現場にお
ける取扱いが極めて安全である。[Table] The denominator is the number of samples, and the numerator is the number of ignitions (effects of the invention) (1) Superior impact resistance compared to conventional products. (2) Superior to conventional products in terms of leakage current, static electricity, induced current, etc. (3) It is safe to manufacture as it does not use sensitive ignition powder. (4) Because of the above performance, it is extremely safe to handle at the site of use.
第１図は本発明の１例を示す電気***の断面
図、第２図は従来の電気***の断面図である。
１……管体、２……添装薬、３……起爆薬、４
……内管、５……延時薬、６……点火薬、７……
電橋線、８……リード線、９……塞栓、１０……
脚線、１１……薄層爆薬、１２……チユーブ、１
３……筒管。
FIG. 1 is a sectional view of an electric detonator showing an example of the present invention, and FIG. 2 is a sectional view of a conventional electric detonator. 1... Tube body, 2... Loading agent, 3... Explosive charge, 4
... Inner tube, 5 ... Time delay medicine, 6 ... Ignition powder, 7 ...
Electric bridge wire, 8... Lead wire, 9... Embolization, 10...
Leg line, 11... thin layer explosive, 12... tube, 1
3...tube.
Claims (1)
と原料***の間の点火部として内壁が薄い層の爆
薬で被覆されたチユーブからなる導火管を使用し
た電気***の薄層爆薬を点火させこれによつて雷
管を起爆することを特徴とする電気***の起爆方
法。 ２ 電橋線と原料***の間の点火部として内壁が
薄い層の爆薬で被覆されたチユーブからなる導火
管を使用したことを特徴とする電気***。 ３ 電橋線と導火管を筒管で包囲した特許請求の
範囲第２項記載の電気***。[Claims] 1. A bridge wire is detonated by a large current, and a fuse tube consisting of a tube whose inner wall is coated with a thin layer of explosive is used as the ignition part between the bridge wire and the raw material detonator. A method for detonating an electric detonator, which comprises igniting a thin layer of explosive in the electric detonator and thereby detonating the detonator. 2. An electric detonator characterized in that a fuse tube consisting of a tube whose inner wall is coated with a thin layer of explosive is used as the ignition part between the bridge wire and the raw material detonator. 3. The electric detonator according to claim 2, in which the electric bridge wire and the fuse are surrounded by a tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23748184A JPS61117188A (en) | 1984-11-13 | 1984-11-13 | Electric primer and initiation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23748184A JPS61117188A (en) | 1984-11-13 | 1984-11-13 | Electric primer and initiation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61117188A JPS61117188A (en) | 1986-06-04 |
| JPH0429635B2 true JPH0429635B2 (en) | 1992-05-19 |
Family
ID=17015963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23748184A Granted JPS61117188A (en) | 1984-11-13 | 1984-11-13 | Electric primer and initiation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61117188A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6206939B1 (en) | 1999-05-13 | 2001-03-27 | Equistar Chemicals, Lp | Wax anti-settling agents for distillate fuels |
| US6203583B1 (en) | 1999-05-13 | 2001-03-20 | Equistar Chemicals, Lp | Cold flow improvers for distillate fuel compositions |
| US6143043A (en) | 1999-07-13 | 2000-11-07 | Equistar Chemicals, Lp | Cloud point depressants for middle distillate fuels |
| CN107501021B (en) * | 2017-10-18 | 2022-05-31 | 深圳市创者自动化科技有限公司 | Detonator production line of detonating tube |
-
1984
- 1984-11-13 JP JP23748184A patent/JPS61117188A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61117188A (en) | 1986-06-04 |
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