JPH08260873A - Crusher dust scattering prevention device - Google Patents

Crusher dust scattering prevention device

Info

Publication number
JPH08260873A
JPH08260873A JP9305395A JP9305395A JPH08260873A JP H08260873 A JPH08260873 A JP H08260873A JP 9305395 A JP9305395 A JP 9305395A JP 9305395 A JP9305395 A JP 9305395A JP H08260873 A JPH08260873 A JP H08260873A
Authority
JP
Japan
Prior art keywords
dust
tubular member
breaker
drive unit
shaped member
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.)
Pending
Application number
JP9305395A
Other languages
Japanese (ja)
Inventor
Michio Goto
道夫 後藤
Hiroyuki Hojuyama
博之 宝珠山
Akihiro Shimomura
晃弘 下村
Daisuke Ito
大輔 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujita Corp
Original Assignee
Fujita Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujita Corp filed Critical Fujita Corp
Priority to JP9305395A priority Critical patent/JPH08260873A/en
Publication of JPH08260873A publication Critical patent/JPH08260873A/en
Pending legal-status Critical Current

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  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

PURPOSE: To dispense with a water source or a special worker and enhance workability and prevent scattering of dust precisely and moreover simplify cleaning work after the completion of work. CONSTITUTION: A breaker device 13 is mounted on the tip of an arm 11 of a hydraulic shovel 1. The breaker 13 comprises a drive unit 15 and breaker pick 17 installed projectingly from the drive unit 15. A flexible cylinder-shaped member 19 is laid out around the breaker pick 17. A base part of a hard rubber- made rod-shaped member 21 is fixed on both sides of the drive unit 15 by means of a mounting member 23. The tip of the cylinder-shaped member 19 is supported on the rod-shaped member 21. One end of a flexible duct hose 27 is connected to the base end of the cylinder-shaped member 19 while this duct hose 27 is connected to a dust collection device 51 loaded on an upper chassis 5.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、岩盤堀削やコンクリー
ト破砕などの工事において発生する粉塵が飛散すること
を防止する破砕機用粉塵飛散防止装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust scattering prevention device for a crusher, which prevents dust generated during construction work such as rock excavation and concrete crushing from scattering.

【0002】[0002]

【従来の技術】土木、建設工事等において岩盤堀削やコ
ンクリート破砕を行う場合、油圧ショベルなどのアーム
の先端にブレーカを取付け、このブレーカにより掘削や
破砕が行われる。そして、岩盤堀削やコンクリート破砕
が行われると、空気中を浮遊する細かい粉塵が発生し、
この粉塵が飛散すると、作業環境、周辺環境を悪化す
る。そのため、従来では、岩盤堀削やコンクリート破砕
を行う場合、堀削破砕箇所に散水し、これにより粉塵の
飛散を防止するようにしている。
2. Description of the Related Art When excavating rock or crushing concrete in civil engineering, construction, etc., a breaker is attached to the tip of an arm of a hydraulic excavator and the breaker is used for excavation and crushing. And when rock excavation and concrete crushing are performed, fine dust floating in the air is generated,
When this dust is scattered, the working environment and the surrounding environment are deteriorated. Therefore, conventionally, when rock excavation or concrete crushing is performed, water is sprinkled on the crushed and crushed site to prevent scattering of dust.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、このよ
うな従来の方式では、散水用の水源が必要であり、工事
現場近くに水道設備があるか、あるいは川、池などより
揚水ポンプを使用して水を汲み上げる必要があり、水源
を確保できない場合には、粉塵の飛散を防止できない問
題があった。また、工事現場は散水によってぬかるんだ
ものになり、工事現場の周りには粉塵を含んだ泥水が流
れるから、工事完了後の清掃作業が面倒になる問題があ
った。また、散水は作業者がホースを手に持って行われ
るため、作業性が悪く、多くの工事要員を必要とする問
題があった。更に、工事現場によっては、安全性の面で
散水作業を行えない問題もあった。本発明は前記事情に
鑑み案出されたものであって、本発明の目的は、水源や
特別な作業員を必要とすることなく、作業性良く、安全
性の有無に拘らず粉塵の飛散を防止でき、しかも工事完
了後の清掃作業を簡略化できる破砕機用粉塵飛散防止装
置を提供することにある。
However, such a conventional method requires a water source for sprinkling, and there is a water supply facility near the construction site, or a pump for pumping water is used from a river or pond. There is a problem that dust cannot be prevented from scattering if water needs to be pumped up and a water source cannot be secured. In addition, the construction site becomes muddy due to watering, and muddy water containing dust flows around the construction site, which causes a problem of troublesome cleaning work after the completion of the construction. Further, since watering is performed by the operator holding the hose in his hand, there is a problem in that workability is poor and many construction personnel are required. Furthermore, depending on the construction site, there was also a problem that the sprinkling work could not be performed in terms of safety. The present invention has been devised in view of the above circumstances, and an object of the present invention is to improve the workability without requiring a water source or a special worker, and to disperse dust regardless of the presence or absence of safety. An object of the present invention is to provide a dust scattering prevention device for a crusher that can be prevented and can simplify the cleaning work after the completion of construction.

【0004】[0004]

【課題を解決するための手段】前記目的を達成するため
本発明に係る破砕機用粉塵飛散防止装置は、駆動部から
突設されたブレーカピックの周囲を覆い、ブレーカピッ
クの軸方向に伸縮可能で先端と基端が開放された筒状部
材と、前記駆動部のハウジングに連結され前記筒状部材
を、前記ブレーカピックの軸方向に移動可能に支持する
支持機構と、一端が前記筒状部材の基端に連結され他端
が集塵装置に連結されたダクトホースとを備えることを
特徴とする。また、本発明は、前記駆動部が、油圧ショ
ベルのアームの先端に取着され、前記ダクトホースは前
記アームで支持され、前記集塵装置は油圧ショベルの車
体に搭載されていることを特徴とする。また、本発明
は、前記支持機構が複数のロッド状部材で構成され、各
ロッド状部材は、前記ハウジングに支持された硬質ゴム
製のガイド筒と、このガイド筒内に摺動可能に組み込ま
れ先端が前記筒状部材の先端に連結された硬質ゴム製の
ガイドロッドにより構成されていることを特徴とする。
In order to achieve the above object, a dust scattering prevention device for a crusher according to the present invention covers the periphery of a breaker pick projecting from a drive unit and can expand and contract in the axial direction of the breaker pick. A tubular member having an open front end and a proximal end, a support mechanism connected to the housing of the drive unit to support the tubular member so as to be movable in the axial direction of the breaker pick, and one end of the tubular member. And a duct hose connected to the base end and the other end to a dust collector. Further, the present invention is characterized in that the drive unit is attached to a tip of an arm of a hydraulic excavator, the duct hose is supported by the arm, and the dust collecting device is mounted on a vehicle body of the hydraulic excavator. To do. Further, in the present invention, the support mechanism is composed of a plurality of rod-shaped members, and each rod-shaped member is incorporated in the guide cylinder made of hard rubber supported by the housing and slidably in the guide cylinder. It is characterized in that the tip is constituted by a guide rod made of hard rubber and connected to the tip of the tubular member.

【0005】[0005]

【作用】本発明では、ブレーカピックにより岩盤堀削、
コンクリート破砕が行われると、発生した粉塵は、筒状
部材、ダクトホースから塵集装置に吸引され、塵集装置
に回収される。また、本発明は、前記駆動部を、油圧シ
ョベルのアームの先端に取着し、前記ダクトホースを前
記アームで支持し、前記集塵装置を油圧ショベルの車体
に搭載して使用できる。また、本発明は、前記支持機構
を硬質ゴム製の部材により構成することができる。
[Function] In the present invention, rock excavation by a breaker pick,
When the concrete is crushed, the generated dust is sucked by the dust collector from the tubular member and the duct hose, and is collected by the dust collector. Further, according to the present invention, the drive unit may be attached to a tip of an arm of a hydraulic excavator, the duct hose may be supported by the arm, and the dust collecting device may be mounted on a vehicle body of the hydraulic excavator for use. Further, according to the present invention, the support mechanism may be made of a hard rubber member.

【0006】[0006]

【実施例】以下、本発明の実施例を図面を参照して説明
する。図1は本発明による破砕機用粉塵飛散防止装置が
装備された油圧ショベルの正面図、図2は破砕機用粉塵
飛散防止装置の正面図、図3は同側面図、図4は同底面
図を示す。油圧ショベル1は、クローラ走行式の下部走
行体3と、下部走行体3上に旋回可能に設けられた運転
室付きの上部車体5により構成されている。上部車体5
には、ブーム7、アーム9,11がそれぞれ上下に傾動
可能に連結され、アーム11の先端にはアタッメントと
してブレーカ装置13が取り付けられている。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a hydraulic excavator equipped with a dust scattering prevention device for a crusher according to the present invention, FIG. 2 is a front view of the dust scattering prevention device for a crusher, FIG. 3 is a side view thereof, and FIG. 4 is a bottom view thereof. Indicates. The hydraulic excavator 1 is composed of a crawler traveling type lower traveling body 3 and an upper vehicle body 5 provided on the lower traveling body 3 so as to be capable of turning and having an cab. Upper car body 5
A boom 7 and arms 9 and 11 are connected to each other so as to be vertically tiltable, and a breaker device 13 is attached to the tip of the arm 11 as an attachment.

【0007】ブレーカ装置13は、アーム11に連結さ
れる駆動部15と、駆動部15から突設されたブレーカ
ピック17により構成され、ブレーカピック17は駆動
部15により所定のストローク、所定の速さで往復振動
され、これにより岩盤堀削やコンクリート破砕がなされ
る。
The breaker device 13 comprises a drive section 15 connected to the arm 11 and a breaker pick 17 projecting from the drive section 15. The breaker pick 17 is driven by the drive section 15 to have a predetermined stroke and a predetermined speed. It is reciprocally oscillated by, which causes rock excavation and concrete crushing.

【0008】ブレーカピック17の周囲には、ブレーカ
ピック17の外周を取り囲む筒状部材19が配設されて
いる。筒状部材19は、プラスチックス、ゴム弾性材料
などによりベローズの如く形成され、ブレーカピック1
7の軸方向に伸縮可能である。前記駆動部15のハウジ
ング1501の両側には硬質ゴム製のロッド状部材21
の基部がマウント部材23により固定され、実施例では
このロッド状部材21により筒状部材19の支持機構が
構成されている。前記ロッド状部材21は、硬質ゴム製
のガイド筒24と、ガイド筒24に摺動可能に組み込ま
れたガイドロッド25で構成されている。ガイドロッド
25の先端は筒状部材19の先端に連結され、筒状部材
19を伸縮可能に支持している。
Around the breaker pick 17, a cylindrical member 19 is provided which surrounds the outer circumference of the breaker pick 17. The tubular member 19 is formed of plastics, rubber elastic material, or the like like a bellows, and the breaker pick 1
7 can be expanded and contracted in the axial direction. The rod-shaped members 21 made of hard rubber are provided on both sides of the housing 1501 of the driving unit 15.
The base is fixed by a mount member 23, and in this embodiment, the rod-shaped member 21 constitutes a support mechanism for the cylindrical member 19. The rod-shaped member 21 includes a guide cylinder 24 made of hard rubber and a guide rod 25 slidably incorporated in the guide cylinder 24. The tip of the guide rod 25 is connected to the tip of the tubular member 19 to support the tubular member 19 so that it can expand and contract.

【0009】前記筒状部材19の基端にはフレキシブル
なダクトホース27の一端が接続されている。ダクトホ
ース27は、図1に示すように、ホース止め金具29に
よってハウジング1501の側面に止められている。ダ
クトホース27の他端は、ホース止め金具31、35に
よりアーム11の側面に取着されたスパイラルダクトホ
ース33、ホース止め金具41、43によりアーム9の
側面に取着されたスパイラルダクトホース39、ホース
止め金具49によりブーム7の側面に取着されたスパイ
ラルダクトホース47、スパイラルダクトホース33、
39、47間を接続するフレキシブルホース37、45
等により集塵装置51に接続され、集塵装置51は上部
車体5上に搭載されている。集塵装置51は、電動機あ
るいは油圧モータにより駆動されるバキューム式のもの
であり、何れの場合も油圧ショベル1より電力あるいは
油圧を与えられて集塵動作する。
One end of a flexible duct hose 27 is connected to the base end of the tubular member 19. As shown in FIG. 1, the duct hose 27 is fixed to the side surface of the housing 1501 by a hose stopper 29. The other end of the duct hose 27 has a spiral duct hose 33 attached to the side surface of the arm 11 by hose stoppers 31 and 35, and a spiral duct hose 39 attached to the side surface of the arm 9 by hose stoppers 41 and 43. A spiral duct hose 47, a spiral duct hose 33 attached to the side surface of the boom 7 by a hose stopper 49,
Flexible hoses 37, 45 connecting 39, 47
The dust collector 51 is mounted on the upper vehicle body 5 by being connected to the dust collector 51. The dust collecting device 51 is a vacuum type device driven by an electric motor or a hydraulic motor, and in any case, the dust collecting device 51 receives electric power or hydraulic pressure from the hydraulic excavator 1 to perform a dust collecting operation.

【0010】次に、作用について説明する。ブレーカピ
ック17の先端が筒状部材19の先端とほぼ一致するよ
うに筒状部材19、ロッド状部材21を伸縮させこれら
の長さを調整する。この調整完了後、集塵装置51を駆
動させる。この状態で、ブレーカ装置13を駆動してブ
レーカピック17による岩盤堀削やコンクリート破砕を
行うと、堀削、破砕で発生した粉塵は、筒状部材19内
に吸引される。そして、筒状部材19内に吸引された粉
塵は、ダクトホース27、ダクトホース33、フレキシ
ブルホース37、ダクトホース39、フレキシブルホー
ス45、ダクトホース47を通って塵集装置51に吸引
され、塵集装置51において回収される。
Next, the operation will be described. The tubular member 19 and the rod-shaped member 21 are expanded and contracted so that the tip of the breaker pick 17 and the tip of the tubular member 19 substantially coincide with each other, and their lengths are adjusted. After this adjustment is completed, the dust collector 51 is driven. In this state, when the breaker device 13 is driven to perform rock excavation and concrete crushing by the breaker pick 17, dust generated by the excavation and crushing is sucked into the tubular member 19. Then, the dust sucked into the tubular member 19 is sucked into the dust collector 51 through the duct hose 27, the duct hose 33, the flexible hose 37, the duct hose 39, the flexible hose 45, and the duct hose 47 to collect the dust. It is collected in the device 51.

【0011】本実施例によれば、掘削箇所や破砕箇所か
ら粉塵が直接吸引されるので、粉塵が工事現場の周辺に
飛散することが回避され、作業環境、周辺環境の悪化が
防止される。また、水を用いないので、水源を確保でき
ない箇所でも粉塵の飛散を防止できると共に、工事完了
後の清掃作業を簡略化できる。また、筒状部材19、ロ
ッド状部材21、ダクトホース27、塵集装置51など
で構成される粉塵飛散防止装置は、全て油圧ショベル1
に装備、搭載されるから、従来のように掘削箇所や破砕
箇所に散水用の作業員を配置する必要がなくなり、安全
性に問題を生じることなく粉塵の飛散が防止される。
According to this embodiment, since the dust is directly sucked from the excavation site or the crushing site, it is possible to prevent the dust from scattering around the construction site and prevent the work environment and the surrounding environment from being deteriorated. Further, since water is not used, dust can be prevented from scattering even in a place where a water source cannot be secured, and cleaning work after completion of construction can be simplified. Further, the dust scattering prevention device including the tubular member 19, the rod-shaped member 21, the duct hose 27, the dust collecting device 51, and the like are all hydraulic excavators 1.
Since it is equipped and installed in the vehicle, it is not necessary to arrange a watering worker at the excavation site or the crushing site as in the conventional case, and dust scattering is prevented without causing a safety problem.

【0012】また、筒状部材19の支持機構を硬質ゴム
製のロッド状部材21で構成したので、ロッド状部材2
1が吸振作用を発揮し、これにより筒状部材19が激し
く揺れること等が防止され、筒状部材19への粉塵の吸
引が効率良く行われる。またダクトホース27、ダクト
ホース33、フレキシブルホース37、ダクトホース3
9、フレキシブルホース45、ダクトホース47の全て
がブーム7、アーム9、11に止められているので、こ
れらホースが堀削破砕作業の邪魔になることもなく、従
来と同様に堀削、破砕作業が何ら支障を来すことなく行
われる。
Further, since the support mechanism for the tubular member 19 is constituted by the rod-shaped member 21 made of hard rubber, the rod-shaped member 2
1 exerts a vibration absorbing action, which prevents the cylindrical member 19 from vibrating violently and the like, and the dust is efficiently sucked into the cylindrical member 19. Further, the duct hose 27, the duct hose 33, the flexible hose 37, the duct hose 3
9, the flexible hose 45, and the duct hose 47 are all stopped by the boom 7, the arms 9 and 11, so that these hoses do not interfere with the excavation and crushing work, and the excavation and crushing work is performed in the same manner as in the past. Is done without any hindrance.

【0013】尚、筒状部材19に油圧シリンダを連結し
ておくと、この油圧シリンダにより筒状部材19の伸縮
を運転室での遠隔操作で行うことも可能となる。
When a hydraulic cylinder is connected to the tubular member 19, the tubular member 19 can be expanded and contracted by remote control in the driver's cab by the hydraulic cylinder.

【0014】[0014]

【発明の効果】以上の説明で明らかなように、本発明に
係る破砕機用粉塵飛散防止装置は、駆動部から突設され
たブレーカピックの周囲を覆い、ブレーカピックの軸方
向に伸縮可能で先端と基端が開放された筒状部材と、前
記駆動部のハウジングに連結され前記筒状部材を、前記
ブレーカピックの軸方向に移動可能に支持する支持機構
と、一端が前記筒状部材の基端に連結され他端が集塵装
置に連結されたダクトホースとを備える構成とした。そ
のため、水源や、散水のための特別な作業員を必要とす
ることなく、作業性良く、安全性の有無に拘らず粉塵の
飛散を防止でき、しかも工事完了後の清掃作業を簡略化
することが可能となる。
As is apparent from the above description, the dust scattering prevention device for a crusher according to the present invention covers the periphery of the breaker pick projecting from the drive unit and can expand and contract in the axial direction of the breaker pick. A tubular member having an open distal end and a proximal end, a support mechanism that is connected to the housing of the drive unit and supports the tubular member so as to be movable in the axial direction of the breaker pick, and one end of the tubular member. A duct hose connected to the base end and the other end to the dust collector is provided. Therefore, it does not require a water source or a special worker for sprinkling, has good workability, can prevent dust scattering regardless of whether it is safe, and simplifies cleaning work after completion of construction. Is possible.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明による破砕機用粉塵飛散防止装置が装備
された油圧ショベルの正面図である。
FIG. 1 is a front view of a hydraulic excavator equipped with a dust scattering prevention device for a crusher according to the present invention.

【図2】破砕機用粉塵飛散防止装置の正面図である。FIG. 2 is a front view of a dust scattering prevention device for a crusher.

【図3】破砕機用粉塵飛散防止装置の側面図である。FIG. 3 is a side view of a dust scattering prevention device for a crusher.

【図4】破砕機用粉塵飛散防止装置の底面図である。FIG. 4 is a bottom view of the dust scattering prevention device for a crusher.

【符号の説明】[Explanation of symbols]

1 油圧ショベル 3 下部走行体 5 上部車体 7 ブーム 9、11 アーム 13 ブレーカ装置 17 ブレーカピック 19 筒状部材 21 ロッド状部材 27 ダクトホース 51 集塵装置 1 Hydraulic excavator 3 Lower traveling body 5 Upper vehicle body 7 Boom 9, 11 Arm 13 Breaker device 17 Breaker pick 19 Cylindrical member 21 Rod member 27 Duct hose 51 Dust collector

───────────────────────────────────────────────────── フロントページの続き (72)発明者 伊藤 大輔 東京都渋谷区千駄ヶ谷四丁目6番15号 株 式会社フジタ内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Daisuke Ito 4-6-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 駆動部から突設されたブレーカピックの
周囲を覆い、ブレーカピックの軸方向に伸縮可能で先端
と基端が開放された筒状部材と、 前記駆動部のハウジングに連結され前記筒状部材を、前
記ブレーカピックの軸方向に移動可能に支持する支持機
構と、 一端が前記筒状部材の基端に連結され他端が集塵装置に
連結されたダクトホースと、 を備えることを特徴とする破砕機用粉塵飛散防止装置。
1. A tubular member that covers the periphery of a breaker pick projecting from the drive unit, is expandable and contractable in the axial direction of the breaker pick, and has a front end and a base end open, and a tubular member connected to the housing of the drive unit. A support mechanism that supports the tubular member so as to be movable in the axial direction of the breaker pick; and a duct hose having one end connected to the base end of the tubular member and the other end connected to a dust collector. A dust scattering prevention device for a crusher.
【請求項2】 前記駆動部は、油圧ショベルのアームの
先端に取着され、前記ダクトホースは前記アームで支持
され、前記集塵装置は油圧ショベルの車体に搭載されて
いる請求項1記載の破砕機用粉塵飛散防止装置。
2. The drive unit is attached to a tip of an arm of a hydraulic excavator, the duct hose is supported by the arm, and the dust collector is mounted on a vehicle body of the hydraulic excavator. Dust scattering prevention device for crusher.
【請求項3】 前記支持機構は複数のロッド状部材で構
成され、各ロッド状部材は、前記ハウジングに支持され
た硬質ゴム製のガイド筒と、このガイド筒内に摺動可能
に組み込まれ先端が前記筒状部材の先端に連結された硬
質ゴム製のガイドロッドにより構成されている請求項1
記載の破砕機用粉塵飛散防止装置。
3. The support mechanism is composed of a plurality of rod-shaped members, and each rod-shaped member is a hard rubber guide cylinder supported by the housing, and is slidably incorporated in the guide cylinder to have a tip end. Is constituted by a hard rubber guide rod connected to the end of the tubular member.
Dust scattering prevention device for the crusher described.
JP9305395A 1995-03-27 1995-03-27 Crusher dust scattering prevention device Pending JPH08260873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9305395A JPH08260873A (en) 1995-03-27 1995-03-27 Crusher dust scattering prevention device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9305395A JPH08260873A (en) 1995-03-27 1995-03-27 Crusher dust scattering prevention device

Publications (1)

Publication Number Publication Date
JPH08260873A true JPH08260873A (en) 1996-10-08

Family

ID=14071773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9305395A Pending JPH08260873A (en) 1995-03-27 1995-03-27 Crusher dust scattering prevention device

Country Status (1)

Country Link
JP (1) JPH08260873A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010523847A (en) * 2007-04-04 2010-07-15 サンドビク マイニング アンド コンストラクション オサケ ユキチュア Noise attenuation shielding structure for rock drilling equipment
CN106437688A (en) * 2016-11-14 2017-02-22 成都欧米伽电子技术有限公司 Dustproof device for pulse generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010523847A (en) * 2007-04-04 2010-07-15 サンドビク マイニング アンド コンストラクション オサケ ユキチュア Noise attenuation shielding structure for rock drilling equipment
CN106437688A (en) * 2016-11-14 2017-02-22 成都欧米伽电子技术有限公司 Dustproof device for pulse generator

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