JP5177547B2 - Wireless explosion-proof equipment - Google Patents

Wireless explosion-proof equipment Download PDF

Info

Publication number
JP5177547B2
JP5177547B2 JP2008309530A JP2008309530A JP5177547B2 JP 5177547 B2 JP5177547 B2 JP 5177547B2 JP 2008309530 A JP2008309530 A JP 2008309530A JP 2008309530 A JP2008309530 A JP 2008309530A JP 5177547 B2 JP5177547 B2 JP 5177547B2
Authority
JP
Japan
Prior art keywords
cover member
explosion
antenna
proof
wireless
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 - Fee Related
Application number
JP2008309530A
Other languages
Japanese (ja)
Other versions
JP2010136062A (en
Inventor
英一 野田
浩幸 今井
奈緒 相川
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric 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 Yokogawa Electric Corp filed Critical Yokogawa Electric Corp
Priority to JP2008309530A priority Critical patent/JP5177547B2/en
Publication of JP2010136062A publication Critical patent/JP2010136062A/en
Application granted granted Critical
Publication of JP5177547B2 publication Critical patent/JP5177547B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Details Of Aerials (AREA)

Description

本発明は、危険場所に配置された耐圧防爆容器内に収納された無線機器のアンテナが、前記耐圧防爆容器外壁の一部を貫通して突出形成されたアンテナカバー部材内のアンテナ室に配置された無線型防爆機器に関するものである。   According to the present invention, an antenna of a wireless device housed in a explosion-proof container disposed in a hazardous area is disposed in an antenna chamber in an antenna cover member formed so as to protrude through a part of the outer wall of the explosion-proof container. This relates to wireless explosion-proof equipment.

本発明対象である無線型防爆機器は、引火ガス等のある危険環境において、流量計，伝送器等のフィールド機器のプラントにおける配置環境が広範囲で有線通信に不向きな条件下で、フィールド機器と制御部間の無線による通信を中継する機能を備える。   The wireless explosion-proof device, which is the subject of the present invention, is controlled in a dangerous environment with flammable gas, etc. in a field environment such as a flow meter, transmitter, etc., in a wide range of arrangement environments in a plant and unsuitable for wired communication. A function of relaying wireless communication between sections is provided.

図６は、従来の無線型防爆機器の構成例を示す断面図である。危険場所Ａに配置された耐圧防爆容器１の外壁の一部を貫通突出してアンテナカバー部材２が形成され、容器室１ａとアンテナカバー部材内側のアンテナ室２ａとの２室が連通している。   FIG. 6 is a cross-sectional view showing a configuration example of a conventional wireless explosion-proof device. An antenna cover member 2 is formed by penetrating and projecting a part of the outer wall of the explosion-proof container 1 disposed in the hazardous area A, and the two chambers, the container chamber 1a and the antenna chamber 2a inside the antenna cover member, communicate with each other.

容器室１ａ内には無線機器３が収納され、アンテナ室２ａ内にはこの無線機器の接続されたアンテナ４が収納されている。アンテナカバー部材２は電波透過性部材で形成され、無線機器３はアンテナ４を介してフィールド機器５と通信する。   A radio device 3 is accommodated in the container chamber 1a, and an antenna 4 to which the radio device is connected is accommodated in the antenna chamber 2a. The antenna cover member 2 is formed of a radio wave transmitting member, and the wireless device 3 communicates with the field device 5 via the antenna 4.

無線機器３は、耐圧防爆容器１の外壁の一部を貫通するケーブル引出部１ｂを介して通信ケーブル６により安全場所Ｂに配置されている制御部７に接続され通信する。同様に、無線機器３は、耐圧防爆容器１の外壁の一部を貫通するケーブル引出部１ｃを介して電源ケーブル８により安全場所Ｂに配置されている電源部９に接続され、給電される。   The wireless device 3 is connected to and communicates with the control unit 7 disposed in the safe place B by the communication cable 6 through the cable lead-out unit 1b that penetrates a part of the outer wall of the explosion-proof container 1. Similarly, the wireless device 3 is connected to the power supply unit 9 disposed in the safe place B by the power cable 8 via the cable lead-out portion 1c that penetrates a part of the outer wall of the explosion-proof container 1, and is supplied with power.

特開平９−１８２２８４号公報Japanese Patent Laid-Open No. 9-182284

従来構成の無線型防爆機器では、次のような問題がある。
（１）アンテナカバー部材２を形成する電波透過性部材は、主に非金属（合成樹脂またはガラス）で形成されるため、衝撃に強くはなく、耐圧防爆構造としては金属に劣る。特に合成樹脂素材は、加水分解等の経年劣化による強度低下が避けられない。 The conventional wireless explosion-proof device has the following problems.
(1) The radio wave transmitting member that forms the antenna cover member 2 is mainly made of a non-metal (synthetic resin or glass), and thus is not strong against impact and is inferior to metal as a pressure-proof explosion-proof structure. In particular, a synthetic resin material cannot avoid a decrease in strength due to deterioration over time such as hydrolysis.

（２）ガラスだけでアンテナカバー部材２を形成するのは、次の点で好ましくない。
・比重が高く、細かな形状コントロールができないので、大きな形状になる。大きな形状になると、大きな爆破力に耐えるため肉厚も厚くなり、重量が増してしまう。
・防塵，防水，防爆性能を得るために仕上げ加工が必要となり、コストアップとなる。 (2) Forming the antenna cover member 2 with only glass is not preferable in the following points.
-Since the specific gravity is high and fine shape control is not possible, it becomes a large shape. When the shape becomes large, the wall thickness increases to withstand a large blasting force, and the weight increases.
-Finishing is required to obtain dustproof, waterproof, and explosion-proof performance, which increases costs.

（３）容器室１ａとアンテナカバー部材２の内側のアンテナ室２ａの２室が連通している構造のため、大きな爆発エリアを持つ容器室１ａの爆発エネルギーがアンテナカバー部材２にかかるので、アンテナカバー部材２に高い耐衝撃強度を保持させる必要があり、形状が複雑化しコストアップとなる。 (3) Since the chamber 1a and the antenna chamber 2a inside the antenna cover member 2 communicate with each other, the explosion energy of the container chamber 1a having a large explosion area is applied to the antenna cover member 2, so that the antenna It is necessary to hold the cover member 2 with high impact strength, and the shape becomes complicated and the cost increases.

本発明は上述した問題点を解決するためになされたものであり、アンテナカバー部材が経年劣化した場合でも、長期に渡り耐圧防爆特性を維持可能な無線型防爆機器を低コストで実現することを目的としている。   The present invention has been made to solve the above-described problems, and realizes a wireless explosion-proof device that can maintain a pressure-proof property for a long period of time even when an antenna cover member has deteriorated over time, at low cost. It is aimed.

このような課題を達成するために、本発明は次の通りの構成になっている。
（１）危険場所に配置された耐圧防爆容器内に収納された無線機器のアンテナが、前記耐圧防爆容器外壁の一部を貫通して突出形成されたアンテナカバー部材内のアンテナ室に配置された無線型防爆機器において、
前記アンテナカバー部材を覆って前記耐圧防爆容器の外壁に固定配置された保護カバー部材と、
前記アンテナ室と前記耐圧防爆容器の容器室とを隔離して２室構造を形成するための隔壁部材と、
を備え、
前記隔壁部材は、前記アンテナカバー部材に嵌合して一体構造とされると共に、前記隔壁部材と前記アンテナカバー部材の嵌合部にはテーパ部が形成されていることを特徴とする無線型防爆機器。
In order to achieve such a subject, the present invention has the following configuration.
(1) The antenna of the wireless device housed in the explosion-proof container disposed in the hazardous area is disposed in the antenna chamber in the antenna cover member formed so as to protrude through a part of the outer wall of the explosion-proof container. In wireless explosion-proof equipment,
A protective cover member covering the antenna cover member and fixedly disposed on the outer wall of the explosion-proof container;
A partition member for separating the antenna chamber and the container chamber of the explosion-proof container to form a two-chamber structure;
Equipped with a,
The partition wall member is fitted to the antenna cover member to form an integral structure, and a taper portion is formed at a fitting portion between the partition wall member and the antenna cover member. machine.

（２）前記保護カバー部材は、前記アンテナカバー部材よりも経年劣化が少ない部材で形成されていることを特徴とする（１）に記載の無線型防爆機器。 (2) The wireless explosion-proof device according to (1), wherein the protective cover member is formed of a member that is less deteriorated over time than the antenna cover member.

（３）前記無線機器は複数個のアンテナを有し、夫々のアンテナカバー部材に対して共通の保護カバー部材を設けたことを特徴とする（１）または（２）に記載の無線型防爆機器。
( 3 ) The wireless explosion-proof device according to (1) or (2), wherein the wireless device has a plurality of antennas, and a common protective cover member is provided for each antenna cover member. .

（４）前記無線機器は複数個のアンテナを有し、夫々のアンテナカバー部材に１：１に対応して保護カバー部材を設けたことを特徴とする（１）または（２）に記載の無線型防爆機器。
( 4 ) The wireless device according to (1) or (2), wherein the wireless device has a plurality of antennas, and each antenna cover member is provided with a protective cover member corresponding to 1: 1. Type explosion-proof equipment.

（５）前記無線機器は複数個のアンテナを有し、これらアンテナが１個のアンテナカバー部材内に配置されている（１）または（２）に記載の無線型防爆機器。

( 5 ) The wireless explosion-proof device according to (1) or (2), wherein the wireless device has a plurality of antennas, and these antennas are arranged in one antenna cover member.

本発明の構成によれば、次のような効果を期待することができる。
（１）経年劣化が少なく衝撃耐性にも優れた部材で形成されている保護カバー部材１００でアンテナカバー部材２を覆うように取り付けることで、外部からの衝撃力は保護カバー部材１００で受け、爆発力、防水防塵性能はアンテナカバー部材２で受けるように、夫々の部品で役割を分担させ、恒久的な耐圧防爆構造を維持することができる。 According to the configuration of the present invention, the following effects can be expected.
(1) By attaching the antenna cover member 2 so as to cover the antenna cover member 2 with a protective cover member 100 formed of a member having little deterioration over time and excellent in impact resistance, an impact force from the outside is received by the protective cover member 100 and explodes. As the antenna cover member 2 receives power and waterproof / dustproof performance, the role can be shared by the respective parts, and a permanent explosion-proof structure can be maintained.

（２）隔壁部材２００を用いることで、耐圧防爆構造を満足する容器室１ａとアンテナ室２ａの空間を分けて２室構造とすることにより、アンテナ室２ａの爆発エリアとなる体積を大幅に縮小させることができる。 (2) By using the partition member 200, the volume of the explosion area of the antenna chamber 2a is greatly reduced by dividing the space of the container chamber 1a and the antenna chamber 2a satisfying the explosion-proof structure into a two-chamber structure. Can be made.

爆発エリアの体積が小さくなるほど引火性ガスの量も減少するため、爆発に際するエネルギーも小さく抑えることができる。これにより、アンテナカバー部材２の厚みや大きさを増加させることなく、耐圧防爆構造を実現することができる。   As the volume of the explosion area decreases, the amount of flammable gas also decreases, so that the energy at the time of explosion can be kept small. Thereby, a pressure-proof explosion-proof structure can be realized without increasing the thickness and size of the antenna cover member 2.

（３）アンテナカバー部材２と隔壁部材２００は嵌合させて一体構造とすることにより、アンテナカバー部材２を耐圧防爆容器１から外してメンテナンスするときに分解作業が容易となる。 (3) Since the antenna cover member 2 and the partition wall member 200 are fitted to form an integral structure, the disassembly work is facilitated when the antenna cover member 2 is removed from the flameproof container 1 and maintained.

以下、本発明を図面により詳細に説明する。図１は、本発明を適用した無線型防爆機器の一実施形態を示す断面図である。図６で説明した従来構成と同一要素には同一符号を付して説明を省略する。   Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of a wireless explosion-proof device to which the present invention is applied. The same elements as those in the conventional configuration described with reference to FIG.

本発明の構成上の特徴部の第１は、アンテナカバー部材２を覆って耐圧防爆容器１の外壁に取り付けられた保護カバー部材１００である。保護カバー部材１００としては、合成樹脂に比べて経年劣化の影響が著しく少ないガラス素材等が採用できる。   The first structural feature of the present invention is a protective cover member 100 that covers the antenna cover member 2 and is attached to the outer wall of the explosion-proof container 1. As the protective cover member 100, a glass material or the like that is significantly less affected by deterioration over time than a synthetic resin can be employed.

保護カバー部材１００を設けることで、アンテナカバー部材２は加工の容易な合成樹脂等で作成することができ、アンテナ室２ａの体積を最小限の体積にし、爆発力を小さくすることにより肉厚の薄い軽い耐圧アンテナを実現することができる。小さくつくることによりＯリング等の防水防塵構造を簡単にすることができる。   By providing the protective cover member 100, the antenna cover member 2 can be made of a synthetic resin that can be easily processed, and the antenna chamber 2a can be made to a minimum volume, and the thickness of the antenna cover member 2 can be reduced by reducing the explosive force. A thin light pressure resistant antenna can be realized. By making it small, a waterproof and dustproof structure such as an O-ring can be simplified.

本発明の構成上の特徴部の第２は、容器室１ａと連通するアンテナ室２ａの下部において、筒状のアンテナカバー部材２の内壁に嵌合して配置されている隔壁部材２００を備える点にある。   The second structural feature of the present invention is that a partition member 200 is provided in the lower part of the antenna chamber 2a that communicates with the container chamber 1a so as to be fitted to the inner wall of the cylindrical antenna cover member 2. It is in.

隔壁部材２００を用いることで、耐圧防爆構造を満足する容器室１ａとアンテナ室２ａの空間を分けて２室構造とすることができ、これによりアンテナ室２ａの爆発エリアとなる体積を大幅に縮小させることができる。   By using the partition member 200, the space of the container chamber 1a and the antenna chamber 2a satisfying the explosion-proof structure can be divided into a two-chamber structure, thereby greatly reducing the volume of the explosion area of the antenna chamber 2a. Can be made.

爆発エリアの体積が小さくなるほど引火性ガスの量も減少するため、爆発に際するエネルギーも小さく抑えることができる。これにより、アンテナカバー部材２の厚みや大きさを増加させることなく、耐圧防爆構造を実現することができる。   As the volume of the explosion area decreases, the amount of flammable gas also decreases, so that the energy at the time of explosion can be kept small. Thereby, a pressure-proof explosion-proof structure can be realized without increasing the thickness and size of the antenna cover member 2.

アンテナカバー部材２と隔壁部材２００は嵌合して一体構造とされており、その嵌合部には少なくとも１個のテーパ部２００ａが形成されている。このテーパ部により、容器室１ａからの爆発力及びアンテナ室２ａからの爆発力を受け止めることができる。   The antenna cover member 2 and the partition wall member 200 are fitted to form an integral structure, and at least one tapered portion 200a is formed in the fitting portion. By this taper portion, it is possible to receive the explosive force from the container chamber 1a and the explosive force from the antenna chamber 2a.

アンテナカバー部材２と隔壁部材２００は嵌合させて一体構造とすることにより、アンテナカバー部材２を耐圧防爆容器１から外してメンテナンスするときに分解作業が容易となる効果がある。   By fitting the antenna cover member 2 and the partition wall member 200 into an integral structure, there is an effect that the disassembly work is facilitated when the antenna cover member 2 is removed from the flameproof container 1 and maintained.

以下、図２乃至図５により本発明の他の実施形態を説明する。
なお、図２乃至図４では具体例としてアンテナが２個の場合について説明するが、アンテナの数は２個に限定されるものではなく、３個以上であってもよい。 Hereinafter, another embodiment of the present invention will be described with reference to FIGS.
2 to 4, the case where there are two antennas will be described as a specific example. However, the number of antennas is not limited to two, and may be three or more.

図２は、無線機器３が２個のアンテナ４１及び４２を備え夫々がフィールド機器５１及び５２と通信する実施形態である。
２個のアンテナ４１及び４２には、図１と同様に夫々にアンテナカバー部材２１及び２２が取り付けられ、これら２個のアンテナカバー部材を覆って１個の保護カバー部材１００が耐圧防爆容器１の外壁に取り付けられている。 FIG. 2 is an embodiment in which the wireless device 3 includes two antennas 41 and 42 and communicates with field devices 51 and 52, respectively.
The antenna covers 21 and 22 are attached to the two antennas 41 and 42 in the same manner as in FIG. 1, and one protective cover member 100 covers the two antenna cover members and the explosion-proof container 1. It is attached to the outer wall.

図３は、図２と同様に無線機器３が２個のアンテナ４１及び４２を備え、２個のアンテナ４１及び４２には夫々にアンテナカバー部材２１及び２２が取り付けられているが、夫々のアンテナカバー部材２１及び２２に対応して保護カバー部材１０１及び１０２が耐圧防爆容器１の外壁に取り付けられている構成である。   In FIG. 3, the wireless device 3 includes two antennas 41 and 42 as in FIG. 2, and antenna cover members 21 and 22 are attached to the two antennas 41 and 42, respectively. Corresponding to the cover members 21 and 22, the protective cover members 101 and 102 are attached to the outer wall of the flameproof container 1.

図４は、図２，図３と同様に無線機器３が２個のアンテナ４１及び４２を備え夫々がフィールド機器５１及び５２と通信する実施形態であるが、２個のアンテナ４１及び４２が１個のアンテナカバー部材２で形成されるアンテナ室２ａに収納されている構成である。   FIG. 4 shows an embodiment in which the wireless device 3 includes two antennas 41 and 42 and communicates with the field devices 51 and 52 as in FIGS. 2 and 3. In this configuration, the antenna chamber 2a is formed by a single antenna cover member 2.

図５は、基本構成は図１と同一でアンテナ室２ａを容器室１ａから所定距離隔離して配置させたい場合の実施形態である。耐圧防爆容器１を貫通して所定距離延ばされた耐圧防爆構造を満たす延長部材３００の先端部にフランジ部４００を形成し、このフランジ部上面にアンテナ４と隔壁部材２００を収納するアンテナカバー部材２及び保護カバー部材１００を取り付けた構成である。   FIG. 5 shows an embodiment in which the basic configuration is the same as that shown in FIG. A flange portion 400 is formed at the tip of an extension member 300 that passes through the pressure-proof explosion-proof container 1 and extends a predetermined distance to satisfy the pressure-proof structure. 2 and the protective cover member 100 are attached.

以上説明した実施形態で明らかなように、本発明によればアンテナカバー部材を覆う保護カバー部材及び容器室とアンテナ室を隔離して２室構造を実現する隔壁部材の相乗効果により、アンテナカバー部材が経年劣化した場合でも、長期に渡り耐圧防爆特性を維持可能な無線型防爆機器を容易に実現することができる。   As is apparent from the embodiments described above, according to the present invention, the antenna cover member is obtained by the synergistic effect of the protective cover member that covers the antenna cover member and the partition member that separates the container chamber and the antenna chamber to realize a two-chamber structure. Even when the aging deteriorates, it is possible to easily realize a wireless explosion-proof device capable of maintaining the explosion-proof property for a long time.

本発明を適用した無線型防爆機器の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment of the radio | wireless explosion-proof apparatus to which this invention is applied. 本発明の他の一実施形態を示す断面図である。It is sectional drawing which shows other one Embodiment of this invention. 本発明の更に他の一実施形態を示す断面図である。It is sectional drawing which shows another one Embodiment of this invention. 本発明の更に他の一実施形態を示す断面図である。It is sectional drawing which shows another one Embodiment of this invention. 本発明の更に他の一実施形態を示す断面図である。It is sectional drawing which shows another one Embodiment of this invention. 従来の無線型防爆機器の構成例を示す断面図である。It is sectional drawing which shows the structural example of the conventional radio | wireless explosion-proof apparatus.

符号の説明Explanation of symbols

１ 耐圧防爆容器
１ａ 容器室
１ｂ，１ｃ ケーブル引出部
２ アンテナカバー部材
２ａ アンテナ室
３ 無線機器
４ アンテナ
５ フィールド機器
６ 通信ケーブル
７ 制御部
８ 電源ケーブル
９ 電源部
１００ 保護カバー部材
２００ 隔壁部材 DESCRIPTION OF SYMBOLS 1 Explosion-proof container 1a Container room 1b, 1c Cable drawer part 2 Antenna cover member 2a Antenna room 3 Radio equipment 4 Antenna 5 Field equipment 6 Communication cable 7 Control part 8 Power cable 9 Power supply part 100 Protection cover member 200 Bulkhead member

Claims (5)

危険場所に配置された耐圧防爆容器内に収納された無線機器のアンテナが、前記耐圧防爆容器外壁の一部を貫通して突出形成されたアンテナカバー部材内のアンテナ室に配置された無線型防爆機器において、
前記アンテナカバー部材を覆って前記耐圧防爆容器の外壁に固定配置された保護カバー部材と、
前記アンテナ室と前記耐圧防爆容器の容器室とを隔離して２室構造を形成するための隔壁部材と、
を備え、
前記隔壁部材は、前記アンテナカバー部材に嵌合して一体構造とされると共に、前記隔壁部材と前記アンテナカバー部材の嵌合部にはテーパ部が形成されていることを特徴とする無線型防爆機器。 A wireless explosion-proof device in which an antenna of a wireless device housed in an explosion-proof container placed in a hazardous area is disposed in an antenna chamber in an antenna cover member formed so as to protrude through a part of the outer wall of the explosion-proof container. In the equipment
A protective cover member covering the antenna cover member and fixedly disposed on the outer wall of the explosion-proof container;
A partition member for separating the antenna chamber and the container chamber of the explosion-proof container to form a two-chamber structure;
Equipped with a,
The partition wall member is fitted to the antenna cover member to form an integral structure, and a taper portion is formed at a fitting portion between the partition wall member and the antenna cover member. machine. 前記保護カバー部材は、前記アンテナカバー部材よりも経年劣化が少ない部材で形成されていることを特徴とする請求項１に記載の無線型防爆機器。 The wireless explosion-proof device according to claim 1, wherein the protective cover member is formed of a member that is less deteriorated over time than the antenna cover member. 前記無線機器は複数個のアンテナを有し、夫々のアンテナカバー部材に対して共通の保護カバー部材を設けたことを特徴とする請求項１または２に記載の無線型防爆機器。 The wireless explosion-proof device according to claim 1 or 2, wherein the wireless device has a plurality of antennas, and a common protective cover member is provided for each antenna cover member. 前記無線機器は複数個のアンテナを有し、夫々のアンテナカバー部材に１：１に対応して保護カバー部材を設けたことを特徴とする請求項１または２に記載の無線型防爆機器。 3. The wireless explosion-proof device according to claim 1, wherein the wireless device has a plurality of antennas, and each antenna cover member is provided with a protective cover member corresponding to 1: 1. 4. 前記無線機器は複数個のアンテナを有し、これらアンテナが１個のアンテナカバー部材内に配置されている請求項１または２に記載の無線型防爆機器。 The wireless explosion-proof device according to claim 1 or 2, wherein the wireless device has a plurality of antennas, and these antennas are arranged in one antenna cover member.
JP2008309530A 2008-12-04 2008-12-04 Wireless explosion-proof equipment Expired - Fee Related JP5177547B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008309530A JP5177547B2 (en) 2008-12-04 2008-12-04 Wireless explosion-proof equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008309530A JP5177547B2 (en) 2008-12-04 2008-12-04 Wireless explosion-proof equipment

Publications (2)

Publication Number Publication Date
JP2010136062A JP2010136062A (en) 2010-06-17
JP5177547B2 true JP5177547B2 (en) 2013-04-03

Family

ID=42346907

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008309530A Expired - Fee Related JP5177547B2 (en) 2008-12-04 2008-12-04 Wireless explosion-proof equipment

Country Status (1)

Country Link
JP (1) JP5177547B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5310707B2 (en) 2010-12-15 2013-10-09 横河電機株式会社 Explosion-proof container

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0964618A (en) * 1995-08-29 1997-03-07 Yokowo Co Ltd Antenna system
JP3040068B2 (en) * 1995-12-26 2000-05-08 株式会社中村電機製作所 Explosion-proof antenna
JP3573962B2 (en) * 1998-06-15 2004-10-06 三菱電機株式会社 Explosion-proof base station equipment
JP3082946U (en) * 2001-06-25 2002-01-11 株式会社エヌ・ティ・ティ エムイー北陸 Outdoor antenna freeze prevention device
JP2005348032A (en) * 2004-06-02 2005-12-15 Yokohama Rubber Co Ltd:The On-vehicle communication antenna
JP4838050B2 (en) * 2006-05-22 2011-12-14 出光興産株式会社 Wireless LAN explosion-proof repeater, explosion-proof switching hub, explosion-proof wireless communication means, switching hub with explosion-proof wireless communication means, and communication system in hazardous areas

Also Published As

Publication number Publication date
JP2010136062A (en) 2010-06-17

Similar Documents

Publication Publication Date Title
WO2018102024A8 (en) Antennae for hazardous location light fixtures
WO2013033542A3 (en) Degradable shaped charge and perforating gun system
IN2012DN02994A (en)
EP4026193A4 (en) Lightweight battery housing assembly
EP2517960A3 (en) Multifunctional chambered radiation shields and systems and related methods
WO2009066570A1 (en) Vacuum capacitor
MX2019001662A (en) Battery housing.
AU2016232161B2 (en) A valve for a gas cylinder
WO2012067861A3 (en) Pressure relief system for switchgear
US11252830B2 (en) Explosion-proof housing with inner pressure relief
JP5177547B2 (en) Wireless explosion-proof equipment
EP3048740A1 (en) Antenna module, wireless device, and field-device control system
WO2009079062A3 (en) Field installation of a vehicle protection system
WO2017151237A3 (en) Simple and robust configuration for icf targets
ZA200905070B (en) Shrouded penetrating aerial bomb
MX2018009652A (en) Mounting bar assembly for a materials handling vehicle.
US20160226550A1 (en) Wireless module, wireless device, and field device control system
IN2015DN02709A (en)
MX2018010381A (en) Building structure and kit therefor.
NZ725474A (en) Shock-absorbing device for a humanoid robot
WO2017140518A3 (en) Modular multi-sensor fire- and/or spark detector
WO2015167781A3 (en) Solenoid coil for hazardous locations
MX2016003108A (en) Camouflaged vehicle having additional lighting equipment.
ZA202209738B (en) Canister assembly with protected cap well and booster explosive comprising the same
WO2014113158A3 (en) Enclosure pressure relief mechanism inherent to case design

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20110825

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20120719

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120809

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120919

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20121213

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20121226

LAPS Cancellation because of no payment of annual fees