JPH036435A - Differential-pressure and pressure transmitter - Google Patents
Differential-pressure and pressure transmitterInfo
- Publication number
- JPH036435A JPH036435A JP14077489A JP14077489A JPH036435A JP H036435 A JPH036435 A JP H036435A JP 14077489 A JP14077489 A JP 14077489A JP 14077489 A JP14077489 A JP 14077489A JP H036435 A JPH036435 A JP H036435A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- pressure
- unit
- transmitter
- detection
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract 1
- 238000003475 lamination Methods 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は耐圧防爆構造が要求される現場設置タイプの差
圧または圧力指示発信器(以下単に差圧・圧力発信器と
いう)に関し、特にこの発信器全体の小型、軽量かつ低
コスト化を図ってなる差圧・圧力発信器の改良に関する
。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a field installation type differential pressure or pressure indicating transmitter (hereinafter simply referred to as a differential pressure/pressure transmitter) that requires a flameproof and explosion-proof structure, and particularly relates to This invention relates to improvements in differential pressure/pressure transmitters that aim to reduce the size, weight, and cost of the entire transmitter.
この種の現場設置タイプの差圧・圧力発信器は、各種プ
ロセス流体の圧力、差圧あるいは液面等を測定しその測
定信号をコントローラ側に発信するために測定現場等に
設置されるものであり、たとえば実開昭81−1122
48号公報などを始めとして従来から種々構成のものが
知られている。This type of field-installed differential pressure/pressure transmitter is installed at the measurement site to measure the pressure, differential pressure, or liquid level of various process fluids and transmit the measurement signal to the controller side. Yes, for example Utility Model No. 81-1122
Various configurations have been known in the past, including the one disclosed in Japanese Patent No. 48.
従来この種の差圧・圧力発信器として一般には、受圧部
およびその受圧信号を感知して検出信号を送出する手段
を有する検出部ボディと、この検出部ボディから延設さ
れる円筒状連結部の先端側に連結されかつ前記検出信号
送出手段に接続されるアンプユニットやこのアンプユニ
ット側に選択的に接続され測定値を設置現場にて確認す
るためにオプションとして用いられる指示計(以下メー
タという)などを収容して内設してなる発信部ケースと
、この発信部ケース側部に連結部を介して一体に連設さ
れその内部に外部電源側に接続される端子板を収容して
なる端子箱とからなる発信器ケーシングを備えてなり、
その内部収容部品であるアンプユニット、メータ、端子
板は、リード線やコネクタなどにより適宜電気的に接続
された状態で所要の位置に収容して内設するといった構
成が採用されていた。Conventionally, this type of differential pressure/pressure transmitter generally includes a pressure receiving part, a detecting part body having a means for sensing the received pressure signal and sending out a detection signal, and a cylindrical connecting part extending from the detecting part body. An amplifier unit connected to the tip side of the sensor and connected to the detection signal sending means, and an indicator (hereinafter referred to as a meter) that is selectively connected to the amplifier unit side and used as an option to confirm measured values at the installation site. ), etc., and a terminal board that is integrally connected to the side of the transmitter case via a connecting part and is connected to an external power source. It is equipped with a transmitter casing consisting of a terminal box,
The amplifier unit, meter, and terminal board, which are internally housed components, are housed in a required position and installed inside the device while being appropriately electrically connected through lead wires, connectors, and the like.
そして、このような現場設置タイプの差圧・圧力発信器
において、たとえば石油精製工場等に用いられるもので
は、その外側を耐圧防爆構造とすることが保安上の理由
から求められており、このため上述した発信器ケーシン
グ各部での密封構造などを確実にし、耐圧防爆構造を確
実に確保し得るような構成とされていた。For safety reasons, such field-installed differential pressure/pressure transmitters used in oil refineries, etc. are required to have a pressure-resistant and explosion-proof structure on the outside. The transmitter casing has a structure that ensures a sealed structure in each part of the transmitter casing and ensures a pressure-resistant and explosion-proof structure.
ところで、上述したような従来の差圧・圧力発信器によ
れば、受圧部を含む検出部ボディと、これに連設される
発信器ケーシングを構成する発信部ケースおよびこれに
連設される端子箱との三つの構成要素の結合構造によっ
て構成されているため、この計器全体が大型化するとと
もに構造も複雑化してしまうものであった。特に、この
発信器を耐圧防爆構造とする場合、上述した発信器ケー
シングを構成する発信部ケースと端子箱とをそれぞれ耐
圧防爆構造とすることが必要で、計器全体が大型化する
傾向にあり、また構造も複雑化し、コスト的にも問題と
なるものであった。By the way, according to the conventional differential pressure/pressure transmitter as described above, there is a detection part body including a pressure receiving part, a transmitter case constituting a transmitter casing connected to this, and a terminal connected to this. Since it is constructed by combining three components with the box, the overall size of this instrument becomes large and the structure becomes complicated. In particular, when this transmitter is made to have a flameproof structure, it is necessary to make the transmitter case and the terminal box, which make up the above-mentioned transmitter casing, a flameproof and explosion-proof structure, which tends to increase the size of the entire instrument. In addition, the structure is complicated, which poses a problem in terms of cost.
特に、この種の差圧・圧力発信器にあっては、耐圧防爆
指針に適合する耐圧防爆構造を満足するとともに、計器
全体の小型、軽量かつコンパクト化、さらに低コスト化
を図ることが望まれるもので、このような要請を満足し
得る何らかの対策を考慮することが望まれている。In particular, for this type of differential pressure/pressure transmitter, it is desirable to satisfy the explosion-proof structure that complies with the pressure-resistant explosion-proof guidelines, and to make the entire instrument smaller, lighter, more compact, and lower in cost. Therefore, it is desirable to consider some measures that can satisfy these demands.
上述した要請に応えるために、本発明に係る差圧・圧力
発信器は、受圧部を有する検出部ボディから延設された
円筒状連結部の先端部に連結して固定される略有底円筒
状を呈するハウジング本体およびその開口端を閉塞する
蓋体からなる発信器ハウジングを用い、この発信器ハウ
ジング内に、検出部ボディ側からの検出信号を受信しこ
れを演算処理するアンプユニットを内設するアンプ室、
そのアンプユニットと外部電源、遠隔操作部とを接続す
る端子を有する端子板ユニットを内設する端子室を、検
出部ボディ側から積層状態で形成するとともに、この端
子室に臨んで前記ハウジング本体の側部に前記各端子に
選択的に接続される外部からのケーブルの引込み口を形
成しており、さらにオプションとしてメータを用いる際
には、上述した発信器ハウジング内で端子室に積層して
メータ室を形成し、外部から視認できるように構成した
ものである。In order to meet the above-mentioned demands, the differential pressure/pressure transmitter according to the present invention includes a substantially bottomed cylinder that is connected and fixed to the tip of a cylindrical connecting part extending from a detecting part body having a pressure receiving part. The transmitter housing consists of a shaped housing body and a lid that closes the open end of the housing, and an amplifier unit is installed inside the transmitter housing to receive the detection signal from the detection body side and process it. amplifier room,
A terminal chamber in which a terminal board unit having terminals for connecting the amplifier unit, an external power source, and a remote control section is installed is formed in a stacked state from the detection body side, and facing this terminal chamber, the housing body is A cable entry port from the outside that is selectively connected to each of the terminals is formed on the side, and when a meter is used as an option, the meter is stacked in the terminal chamber within the transmitter housing described above. It forms a room and is configured to be visible from the outside.
本発明によれば、検出部ボディの円筒状連結部先端側に
発信器ハウジングを構成するハウジング本体を連結して
設け、かつこのハウジング本体内で検出部ボディ側から
アンプユニット、端子板ユニット、さらに選択的にメー
タを積層状態で組込んで配設するとともに、ハウジング
本体の開口端を蓋体で閉塞することにより、耐圧防爆構
造をもち、しかも全体の構成が簡素化され、小型かつ低
コスト化を図れる差圧・圧力発信器を得ることが可能と
なる。According to the present invention, the housing body constituting the transmitter housing is connected to the tip side of the cylindrical connecting part of the detection body, and the amplifier unit, the terminal plate unit, and the By selectively installing meters in a stacked manner and closing the open end of the housing body with a lid, it has a flameproof and explosion-proof structure, and the overall configuration is simplified, making it smaller and lower in cost. It becomes possible to obtain a differential pressure/pressure transmitter that can measure the
以下、本発明を図面に示した実施例を用いて詳細に説明
する。Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.
第1図ないし第3図は本発明に係る差圧拳圧力発信器の
一実施例を示すものであり、これらの図において全体を
符号lで示す差圧・圧力発信器(本実施例では差圧発信
器を例示している)は、受圧部として一対のバリアダイ
ヤフラム2a。1 to 3 show an embodiment of the differential pressure fist pressure transmitter according to the present invention, and in these figures, the differential pressure/pressure transmitter (in this embodiment, the differential pressure transmitter is indicated as a whole by the symbol l) is shown. exemplifying a pressure transmitter) has a pair of barrier diaphragms 2a as pressure receiving parts.
?bを有しかつこれらバリアダイヤフラム2a。? b and these barrier diaphragms 2a.
2bによって感知された二つの流体圧間での差圧を検出
する感圧センサ3などを内蔵してなる検出部ボディ4と
、この検出部ボディ4から突設された円筒状連結部5の
先端部に連結して固定される略有底円筒状を呈するハウ
ジング本体11およびその開口端を閉塞する蓋体12か
らなる発信器ハウジング10とを備えている。なお、上
述した検出部ボディ4は、周知の通り、複数の分割形成
されたボディをポルト・ナツトにより締結することによ
り一体的に組立てられるとともに、その内部に二種類の
被測定用流体圧が導入口6a、7aから導入される圧力
室6,7と、これら圧力室6゜7にバリアダイヤフラム
2a、2bを介して対面し前記感圧センサ3までの間に
圧力伝達媒体が封入されてなる一対の測圧室8a、8b
が形成され、これら測圧室8a、8bはセンタダイヤフ
ラム2Cにより画成されてなる構成とされている。A detection unit body 4 which includes a built-in pressure sensor 3 and the like that detects the differential pressure between two fluid pressures sensed by the sensor 2b, and a tip end of a cylindrical connecting unit 5 that protrudes from the detection unit body 4. The transmitter housing 10 includes a housing body 11 having a substantially bottomed cylindrical shape connected to and fixed to the transmitter housing 10 and a lid body 12 closing the open end of the housing body 11. As is well known, the above-mentioned detection body 4 is integrally assembled by fastening a plurality of divided bodies with port nuts, and two types of fluid pressures to be measured are introduced into the body. A pair of pressure chambers 6 and 7 introduced from ports 6a and 7a, and a pressure transmitting medium sealed between these pressure chambers 6 and 7, which face each other via barrier diaphragms 2a and 2b and reach the pressure sensor 3. Pressure measurement chambers 8a, 8b
These pressure measuring chambers 8a and 8b are defined by a center diaphragm 2C.
また、前記円筒状連結部5は、金属製筒体5aとその内
側筒体5bとからなり、この内側筒体5bには、前記感
圧センサ3からの検出信号を外部に導出させる複数本の
信号取出し用リード9がハーメチックシール等によりシ
ールされた状態で連結部5先端部から突設されている。Further, the cylindrical connecting portion 5 is made up of a metal cylinder 5a and an inner cylinder 5b, and the inner cylinder 5b has a plurality of wires for guiding the detection signal from the pressure sensor 3 to the outside. A signal extraction lead 9 is sealed with a hermetic seal or the like and protrudes from the tip of the connecting portion 5.
ここで、この種の検出部ボディ4における検出部構成お
よびその作用等は従来から周知の通りであり、その詳細
な説明は省略する。Here, the configuration of the detection section and its operation in this type of detection section body 4 are conventionally well known, and detailed explanation thereof will be omitted.
さて、本発明によれば、上述した検出部ボディ4の円筒
状連結部5先端部に連結して設けられる発信器ハウジン
グ10を、ハウジング本体11と蓋体12によって耐圧
防爆指針に適合する構造を確保するとともに、その内部
に、検出部ボディ4側からの検出信号を受信しこれを演
算処理する複数枚のプリント回路基板21a、21bお
よびこれに実装される電気部品21cからなるアンプユ
ニット21を内設するアンプ室22、そのアンプユニッ
)21と外部電源、遠隔操作部(図示せず)とを接続す
る複数の端子23aを有する端子台23と複数の電気部
品24aが実装されている端子板24による端子板ユニ
ット25を内設する端子室26、さらにオプションとし
て選択的に用いられるメータ27を内設するメータ室2
8を、検出部ボディ4側から積層状態となるように形成
したところに特徴を有している。そして、前記端子室2
6に臨んで前記ハウジング本体11の側部には、前記各
端子23aに選択的に接続される外部からのケーブル(
図示せず)の引込み口29を形成しており、また前記メ
ータ27をハウジング10外部から目視可能とする透明
板3oを、前記ハウジング10を構成する蓋体12に開
口した開口部30a内側に耐圧防爆指針を満足する状態
で設けるようにしている。なお、この実施例では、上述
した透明板30を、蓋体12の内側にセットリング30
bにより組付は固定した場合を示し、一方メータ27は
、前記端子板ユニット25側から立設される六角スタッ
ド31に対しねじIトめ固定されている。Now, according to the present invention, the transmitter housing 10 connected to the tip of the cylindrical connecting part 5 of the detection part body 4 described above has a structure that complies with the pressure-resistant explosion-proof guidelines by the housing main body 11 and the lid body 12. At the same time, an amplifier unit 21 consisting of a plurality of printed circuit boards 21a and 21b and an electric component 21c mounted thereon is housed inside, which receives detection signals from the detection unit body 4 side and processes the signals. A terminal block 23 having a plurality of terminals 23a for connecting the amplifier room 22 to be installed, its amplifier unit) 21, an external power source, and a remote control unit (not shown), and a terminal board 24 on which a plurality of electrical components 24a are mounted. A terminal room 26 in which a terminal board unit 25 is installed, and a meter room 2 in which a meter 27 that is selectively used as an option is installed.
8 are formed in a stacked state from the detection unit body 4 side. And the terminal chamber 2
On the side of the housing main body 11 facing the terminal 6, there is provided an external cable (
A transparent plate 3o that forms a lead-in port 29 (not shown) and allows the meter 27 to be viewed from outside the housing 10 is placed inside an opening 30a opened in the lid 12 constituting the housing 10. We are trying to provide it in a manner that satisfies the explosion-proof guidelines. In addition, in this embodiment, the above-mentioned transparent plate 30 is attached to the set ring 30 inside the lid body 12.
b shows that the meter 27 is assembled in a fixed manner, and the meter 27 is fixed to a hexagonal stud 31 erected from the terminal board unit 25 side with screws I.
ここで、上述した発信器ハウジング10およびその内部
への発信器構成部品の組込み構造を、第1図ないし第8
図(a) 、 (b)を用いて詳述すると、まず、本実
施例では、発信器ハウジング10を構成するハウジング
本体11を、アルミニウム合金による鋳物またはグイキ
ャスト等によって略円筒状を呈するように形成された円
筒状部材40と、その一端側(発信器背面側)の開口部
を閉塞するようにねじ込みにより組付けて固定される前
記円筒状部材40とは溶接接合が行なえない異なる材料
、たとえばステンレス鋼により絞り加工等によって略カ
ップ状に形成される底蓋部材41(第4図(a)、(b
)参照)とで構成した場合を示している。なお、図中4
0a、41aは円筒状部材40の一端側開口部に形成さ
れた内周ねじ部およびこれに螺合される底蓋部材41の
周壁部に形成された外周ねじ部で、これらを螺合接合さ
せることにより、この結合部分での耐圧防爆指針に適合
する隙間と奥行長さが満足されるような構成となって1
いる。また、図中41bは前記円筒状連結部5が嵌込ま
れて溶接接合される開口部、42はこれらねじ部40&
、41aの螺合接合時において所要の個所で両部材を連
結固定するための押しねじで、このような押しねじ42
によれば、ハウジング本体11においてケーブル引込み
口29のように方向性が特定される円筒状部材40を、
所要の回転位置で底蓋部材41側に連結することができ
、その実用上での利点は大きい。、
そして、このような構成を採用することにより、このハ
ウジング本体11全体を、従来〜般的であったようにア
ルミニウム合金により鋳造で一体に形成した場合に比べ
、製造が容易に行なえるばかりでなく、検出部ボディ4
側の円筒状連結部5との接合部構造の面からも優れてい
る等の利点がある。すなわち、上述したようなアルミニ
ウム合金によるグイキャスト製品としてハウジング本体
11全体を構成した場合、ステンレス鋼等で形成されて
いる検出部ボディ4側の円筒状連結部5との間を連結す
る結合部に単純な溶接手段を採用2
することはできず、耐圧防爆指針に適合する隙間と奥行
長さをもつ結合部構造を採用しなければならないもので
あった。そして、このような耐圧防爆指針に適合する結
合部構造を採用するには、円筒状連結部5を所定長さに
わたって保持し得るボス部を、ハウジング本体11の底
部外側または内側に形成しなければならず、その結果結
合部構造が複雑化するとともに、計器全体の大型化や大
重量化などを避けられないものであった。Here, the above-described transmitter housing 10 and the structure for assembling the transmitter components therein are illustrated in FIGS. 1 to 8.
To explain in detail using FIGS. (a) and (b), first, in this embodiment, the housing body 11 constituting the transmitter housing 10 is made of aluminum alloy casting or glue casting to have a substantially cylindrical shape. The formed cylindrical member 40 and the cylindrical member 40, which is assembled and fixed by screwing so as to close the opening on one end side (on the back side of the transmitter), are made of different materials that cannot be joined by welding, for example. A bottom cover member 41 (FIGS. 4(a) and 4(b) formed of stainless steel into a substantially cup shape by drawing or the like
) is shown. In addition, 4 in the figure
0a and 41a are an inner circumferential threaded portion formed in the opening on one end side of the cylindrical member 40 and an outer circumferential threaded portion formed in the peripheral wall portion of the bottom cover member 41 which is screwed thereto, and these are screwed together. As a result, the structure is such that the gap and depth at this joint part meet the flameproof and explosion-proof guidelines1. Further, in the figure, 41b is an opening into which the cylindrical connecting portion 5 is fitted and welded, and 42 is an opening for these threaded portions 40&
, 41a is a push screw for connecting and fixing both members at a required point when screwing them together, and such a push screw 42
According to the above, a cylindrical member 40 whose directionality is specified like the cable entry port 29 in the housing body 11 is
It can be connected to the bottom cover member 41 at a required rotational position, which has a great practical advantage. By adopting such a configuration, the entire housing body 11 can be manufactured more easily than in the case where the entire housing body 11 is integrally formed by casting from an aluminum alloy, as has been the case in the past. Detector body 4
There are also advantages such as an excellent joint structure with the cylindrical connecting portion 5 on the side. That is, when the entire housing body 11 is configured as a gui-cast product made of aluminum alloy as described above, the connecting portion connecting with the cylindrical connecting portion 5 on the detection body 4 side made of stainless steel or the like is It was not possible to use simple welding methods, and a joint structure with a gap and depth that complied with the flameproof and explosion-proof guidelines had to be adopted. In order to adopt a joint structure that complies with such flameproof and explosion-proof guidelines, a boss part capable of holding the cylindrical joint part 5 over a predetermined length must be formed on the outside or inside of the bottom of the housing body 11. As a result, the joint structure becomes complicated, and the overall size and weight of the instrument are unavoidably increased.
これに対し本発明による構成では、円筒状連結部5とこ
のカップ状底蓋部材41とを溶接接合することができ、
耐圧防爆指針をこの接合部で配慮することが不要である
ために、構造を簡素化し部品点数や加工、組立工数等を
軽減できるとともに、底蓋部材41の肉厚を、接合強度
を許容し得る限度範囲内で最小限まで薄くでき、重量軽
減を図れる等の利点を奏するものである。On the other hand, in the configuration according to the present invention, the cylindrical connecting portion 5 and the cup-shaped bottom cover member 41 can be joined by welding,
Since it is not necessary to consider the pressure-resistant and explosion-proof guidelines for this joint, the structure can be simplified and the number of parts, processing, assembly man-hours, etc. can be reduced, and the thickness of the bottom cover member 41 can be adjusted to allow for the joint strength. This has the advantage of being able to be made as thin as possible within limits and reducing weight.
また、上述したように構成されるノ\ウジング本体11
において底蓋部材41内には、前記アンプユニッ)21
を収容配置するためのアンプ室22が形成されている。Further, the nozzing body 11 configured as described above
In the bottom cover member 41, the amplifier unit) 21 is installed.
An amplifier chamber 22 is formed for accommodating and arranging the.
ここで、本実施例では、このアンプ室22内に配置され
る各種電気部品に対しての外部からのノイズ対策として
、この底蓋部材41の開口部に嵌込んで固定されるシー
ルド板43を用いている。このシールド板43は、第5
図(a)、(b)に示すように、全体が略円板状を呈し
、その周縁部の一部に外方に延設され前記底蓋部材41
側に嵌込んだ際に係止される係止片43a(第6図等参
照)を構成するとともに、それ以外の部分は円弧状壁部
43bとして折曲げ形成され、底蓋部材41との組合わ
せが適切かつ確実に行なえるような構成となっている。In this embodiment, a shield plate 43 that is fitted and fixed into the opening of the bottom cover member 41 is used as a countermeasure against external noise for various electrical components arranged in the amplifier chamber 22. I am using it. This shield plate 43 is the fifth
As shown in FIGS. (a) and (b), the entire body has a substantially disk shape, and the bottom cover member 41 is provided outwardly at a part of its peripheral edge.
It constitutes a locking piece 43a (see FIG. 6, etc.) that is locked when it is fitted into the side, and the other part is bent and formed as an arcuate wall portion 43b, and is easy to assemble with the bottom cover member 41. The structure is such that alignment can be performed appropriately and reliably.
なお、第5図(a)中43cは第1図から明らかなよう
にこのシールド板43の両面間を電気的に接続するため
の連通端子44用の穴、43dは前記端子ユニット25
等を組付けるための端子台スペーサ45の固定用穴で、
さらに43eはこのシールド板43の中央部に開口され
た大径な開口部で、この開口部43eは前記シールド機
能をもつような金属薄板46で覆われている。これは、
この底蓋部材41によるアンプ室と端子室26側との間
で圧力重積現象が生じることのないように両室を連通可
能な状態とし、しかもシールド機能を確保するためのも
のである。As is clear from FIG. 1, 43c in FIG. 5(a) is a hole for a communication terminal 44 for electrically connecting both surfaces of the shield plate 43, and 43d is a hole for the terminal unit 25.
The fixing hole of the terminal block spacer 45 for assembling etc.
Furthermore, 43e is a large diameter opening opened in the center of this shield plate 43, and this opening 43e is covered with a thin metal plate 46 having the shielding function. this is,
This bottom cover member 41 allows the amplifier chamber and the terminal chamber 26 to communicate with each other so that no pressure buildup occurs between the two chambers, and also ensures a shielding function.
また、47は第1図および第7図から明らかなように、
アンプ室22内で複数枚のプリント回路基板21a、2
1bを所定間隔をおいて積層した状態で保持するための
保持具である。Also, as is clear from Figures 1 and 7, 47 is
In the amplifier chamber 22, a plurality of printed circuit boards 21a, 2
This is a holder for holding 1b in a stacked state at a predetermined interval.
50は前記端子板ユニット26の上方を覆うように被せ
られかつ前記ケーブル引込み口29に臨む部分が傾斜す
るように折曲げられた案内面50aとなるガイド板で、
第1図および第8図(a)、(b)から明らかなように
、上述した端子板24上での電気部品24a等が、引込
み口29から引込まれるケーブルの先端等に接触して損
傷したりすることのないように構成とされている。Reference numeral 50 denotes a guide plate which is placed over the terminal board unit 26 and serves as a guide surface 50a whose portion facing the cable lead-in port 29 is bent so as to be inclined;
As is clear from FIG. 1 and FIGS. 8(a) and (b), the electrical components 24a, etc. on the terminal board 24 mentioned above come into contact with the tip of the cable drawn in from the lead-in port 29, and are damaged. The structure is designed so that it will not happen.
なお、このガイド板50に、端子板24上の電気部品2
4a等を電気的ノイズから保護するシールド機能をもた
せると機能的に有利である。さらに、第1図中52.5
3は前記端子板25と前記5
メータ27とを電気的に接続するためのコネクタである
。Note that the electrical components 2 on the terminal board 24 are attached to this guide plate 50.
It is functionally advantageous to have a shielding function to protect 4a etc. from electrical noise. Furthermore, 52.5 in Figure 1
3 is a connector for electrically connecting the terminal board 25 and the meter 27.
以上の構成による本発明による差圧・圧力発信器1によ
れば、検出部ボディ4の円筒状連結部5先端側に発信器
ハウジング10を構成するハウジング本体11(底蓋部
材41)を連結して設け、かつこのハウジング本体11
内で検出部ボディ4側からアンプユニット21、端子板
ユニット25、さらに選択的にメータ27を積層状態で
組込んで配設するとともに、ハウジング本体11の開口
端を蓋体12で閉塞することにより、耐圧防爆構造をも
ち、しかも全体の構成が簡素化され、小型かつ低コスト
化を図れる等の種々優れた効果がある。According to the differential pressure/pressure transmitter 1 according to the present invention having the above configuration, the housing main body 11 (bottom cover member 41) constituting the transmitter housing 10 is connected to the tip side of the cylindrical connecting portion 5 of the detection unit body 4. and this housing body 11
The amplifier unit 21, the terminal board unit 25, and optionally the meter 27 are assembled and arranged in a stacked manner from the detection part body 4 side, and the open end of the housing body 11 is closed with the lid body 12. It has a pressure-resistant and explosion-proof structure, and has various excellent effects such as a simplified overall configuration, miniaturization, and cost reduction.
ここで、上述した実施例では、発信器ハウジング10内
でメータ27をアンプユニッ)21や端子板ユニット2
5に積層して一体的に組付は固定した場合を例示したが
、本発明はこれに限定されず、第9図に示すように、メ
ータ27をハウジング本体ll内に設けた枢軸部材60
により回動可6
能に支持し、蓋体12を開放したときに、メータ27を
回動させて内部を開放し、端子板ユニット25等の点検
等を容易に行なえるように構成してもよいものである。Here, in the embodiment described above, the meter 27 is connected to the amplifier unit 21 or the terminal board unit 2 in the transmitter housing 10.
Although the case in which the meter 27 is stacked on the housing main body 11 and fixed as an example is illustrated, the present invention is not limited to this, and as shown in FIG.
The meter 27 may be rotatably supported by the terminal block 6, and when the lid body 12 is opened, the meter 27 may be rotated to open the inside and the terminal board unit 25 etc. may be easily inspected. It's good.
なお、図中61は端子板ユニット25側に結線されるコ
ネクタ62を有するリード線である。Note that 61 in the figure is a lead wire having a connector 62 connected to the terminal board unit 25 side.
また、上述した実施例においては、発信器ハウジングl
Oを構成するハウジング本体11を、円筒状部材40と
底蓋部材41とで構成し、これらをねじ結合により耐圧
防爆指針を満足し得る隙間と奥行長さをもって結合した
場合を説明したが、本発明はこれに限定されず、第1θ
図(a)、(b)以下に説明したような結合部構成を採
用してもよいことは勿論である。ここで、第1O図(a
)、(b)では、カップ状に成形されるステンレス鋼で
形成してなる底蓋部材41を用いており、かつその結合
部70を、複数の環状突部と環状溝で形成するようにし
ている。そして、このような結合部70をもつ底蓋部材
41を、円筒状部材40をアルミニウム合金等でグイキ
ャストにより形成する際に、型内にインサートして略一
体化して結合されるようにして形成する。このようにす
ると、耐圧防爆指針に適合する隙間と奥行長さを確保し
てなる結合部70を得ることが可能となる。なお、この
結合部70において両部材が相対的に回転しないように
、周方向の一部に凹凸部を回り止めとして形成しておく
とよい。Further, in the embodiment described above, the transmitter housing l
The housing main body 11 constituting the O is composed of a cylindrical member 40 and a bottom cover member 41, which are connected by screws with a gap and depth that satisfy the flameproof explosion-proof guidelines. The invention is not limited to this, but the first θ
Of course, it is also possible to adopt the structure of the connecting portion as explained below in FIGS. (a) and (b). Here, in Figure 1O (a
) and (b), the bottom cover member 41 made of stainless steel and formed into a cup shape is used, and the connecting portion 70 thereof is formed of a plurality of annular protrusions and an annular groove. There is. The bottom cover member 41 having such a joint portion 70 is formed by inserting it into a mold and joining it almost integrally when the cylindrical member 40 is formed of aluminum alloy or the like by gui-casting. do. In this way, it is possible to obtain the joint portion 70 that has a gap and a depth that meet the pressure-resistant and explosion-proof guidelines. Note that in order to prevent the two members from rotating relative to each other in the joint portion 70, it is preferable to form an uneven portion in a portion in the circumferential direction as a rotation stopper.
このような構成における変形例としては第11図(a)
、(b) 、(c)に示すように、底蓋部材41を複
数部材に分割形成するとともに、これらを適宜溶接など
で接合固定するように構成したり、第12図に示すよう
に、円筒状連結部5偏に連結される部分のみをスリーブ
として上述した結合部70を介して円筒状部材40側に
一体化して形成するようにしてもよい。また、上述した
結合部70としては、第13図(a) 、 (b) 、
(c)に示すような種々の変形例が考えられる。A modification example of such a configuration is shown in FIG. 11(a).
, (b) and (c), the bottom cover member 41 may be divided into a plurality of parts and these parts may be joined and fixed by welding or the like as appropriate, or as shown in FIG. Only the portion connected to the shaped connecting portion 5 may be integrally formed on the cylindrical member 40 side via the above-mentioned connecting portion 70 as a sleeve. Moreover, as the above-mentioned coupling part 70, FIGS. 13(a) and 13(b),
Various modifications as shown in (c) are possible.
なお、本発明は上述した実施例構造に限定されず、発信
器各部の形状、構造等を、適宜変形、変更することは自
由で、種々の変形例が考えられよう。たとえば上述した
実施例では、オプションとして使用されるメータ27を
用いてなる場合を例示したが、これに限定されず、メー
タ27がない場合にあっても、本発明の作用効果を得る
ことができることは言うまでもない。It should be noted that the present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part of the transmitter may be modified or changed as appropriate, and various modifications may be considered. For example, in the above-mentioned embodiment, the case where the meter 27 is used as an option is illustrated, but the present invention is not limited to this, and the effects of the present invention can be obtained even when the meter 27 is not provided. Needless to say.
以上説明したように、本発明に係る差圧・圧力発信器に
よれば、受圧部を有する検出部ボディに対し円筒状連結
部を介して連結されてなる発信器ハウジングを用い、こ
のハウジング内に、検出部ボディ側からの検出信号を受
信しこれを演算処理するアンプユニットを内設するアン
プ室、そのアンプユニットと外部電源、遠隔操作部とを
接続する端子を有する端子板ユニットを内股する端子室
を、検出部ボディ側から積層状態で形成するとともに、
オプションとしてメータを用いる際には上述した端子室
の蓋体側に外部から視認できるようにしてメータ室を積
層して形成するようにしたので、簡単かつ安価な構成に
もかかわらず、−個のハウジング内に全ての必要な電気
系部材を組込ん9
でおり、その耐圧防爆構造を確保することが比較的簡単
に行なえ、しかも計器全体の小型かつコンパクト化や低
コスト化を図れる等といった種々優れた効果がある。As explained above, according to the differential pressure/pressure transmitter according to the present invention, a transmitter housing is connected to a detecting part body having a pressure receiving part via a cylindrical connecting part. , an amplifier room that houses an amplifier unit that receives and arithmetic-processes detection signals from the detection body side, and a terminal that houses a terminal board unit that has terminals that connect the amplifier unit to an external power source and a remote control unit. The chambers are formed in a stacked state from the detection part body side, and
When using a meter as an option, the meter chamber is stacked on the lid side of the terminal chamber so that it can be seen from the outside, so despite the simple and inexpensive configuration, - All the necessary electrical components are built into the instrument9, making it relatively easy to ensure its flameproof and explosion-proof structure, and it also has various advantages such as making the entire instrument smaller, more compact, and lower cost. effective.
また、本発明によれば、発信器ハウジングを構成するハ
ウジング本体を、円筒状部材とその一端開口部に連設さ
れかつ円筒状部材とは異なる材料により形成された底蓋
部材とで構成するとともに、これら円筒状部材と底蓋部
材とを、耐圧防爆指針に適合する隙間と奥行長さとを有
する結合部を介して一体的に連結することにより、従来
のような一体構造による発信器ケーシングに比べて簡単
に成形し得るとともに、必要とされる耐圧防爆構造を満
足し、しかもコスト低減化を図れるという利点もある。Further, according to the present invention, the housing body constituting the transmitter housing is composed of a cylindrical member and a bottom cover member that is connected to the opening at one end of the cylindrical member and is made of a material different from that of the cylindrical member. By integrally connecting these cylindrical members and the bottom cover member through a joint having a gap and a depth that conforms to the flameproof explosion-proof guidelines, the transmitter casing is constructed in one piece. It has the advantage that it can be easily molded, satisfies the required pressure-resistant and explosion-proof structure, and can reduce costs.
第1図は本発明に係る差圧・圧力発信器の一実施例を示
す側断面図、第2図および第3図はその側面図および正
面図、第4図(a)、(b)はハウジング本体の一部を
構成する底蓋部材を拡大して示す0
正面図および側断面図、第5図(a)、(b)はこの底
蓋部材の開口部に組付けられ内部にアンプ室を形成する
シールド板部材の正面図および側断面図、第6図は底蓋
部材に対してのシールド板部材の組付は状態を説明する
ための要部拡大図、第7図はアンプ室内でのアンプユニ
ットを構成するプリント回路基板の保持状態を示す概略
断面図、第8図(a)、(b)は端子室への端子板ユニ
ットの組込み状態を示す概略断面図、第9図は本発明の
別の実施例を示す側断面図、第1θ図(a)、(b)は
本発明において発信器ハウジング構造を示す他の実施例
の概略断面図およびその要部拡大断面図、第11図(a
)、(b)、(C) 、第12図および第13図(a)
、(b)。
(c)はその変形例を説明するための要部拡大断面図で
ある。
1・・・・差圧・圧力発信器、2a、2b・・・・バリ
アダイヤフラム、3・・・・感圧センサ、4・・・・検
出部ボディ、5・・・・円筒状連結部、10・・・・発
信器ハウジング、11・・・・ハウジング本体、12・
・・・蓋体、21・・・・アンプユニット、21a、2
1b・・・・プリント回路基板、22・・・・アンプ室
、23・・・・端子台、23a・・・・端子、24・・
・・端子板、25・・・・端子板ユニット、26・・・
・端子室、27・・・・メータ、28・・・・メータ室
、30・・・・透明板、40・・・・円筒状部材、41
・・・・底蓋部材、70・・・・結合部。FIG. 1 is a side sectional view showing an embodiment of the differential pressure/pressure transmitter according to the present invention, FIGS. 2 and 3 are side and front views thereof, and FIGS. 4(a) and (b) are 5(a) and 5(b) show an enlarged front view and side sectional view of the bottom cover member that constitutes a part of the housing body, and the amplifier chamber is assembled into the opening of the bottom cover member. Figure 6 is an enlarged view of the main parts to explain the assembly of the shield plate member to the bottom cover member, and Figure 7 is a diagram showing the inside of the amplifier chamber. 8(a) and 8(b) are schematic sectional views showing the state in which the terminal board unit is installed in the terminal chamber, and FIG. FIGS. 11A and 11B are side sectional views showing another embodiment of the invention; FIGS. Figure (a
), (b), (C), Figures 12 and 13 (a)
,(b). (c) is an enlarged sectional view of a main part for explaining the modification. DESCRIPTION OF SYMBOLS 1... Differential pressure/pressure transmitter, 2a, 2b... Barrier diaphragm, 3... Pressure sensitive sensor, 4... Detector body, 5... Cylindrical connection part, 10... Transmitter housing, 11... Housing body, 12...
... Lid body, 21 ... Amplifier unit, 21a, 2
1b...Printed circuit board, 22...Amplifier room, 23...Terminal block, 23a...Terminal, 24...
...Terminal board, 25...Terminal board unit, 26...
・Terminal room, 27...meter, 28...meter room, 30...transparent plate, 40...cylindrical member, 41
...Bottom cover member, 70...Joining part.
Claims (3)
送出する手段を備えてなる検出部ボディと、この検出部
ボディから延設された円筒状連結部の先端部に連結して
固定される略有底円筒状を呈するハウジング本体および
その開口端を閉塞する蓋体からなる発信器ハウジングと
を備えてなり、この発信器ハウジング内に、前記検出部
ボディ側からの検出信号を受信しこれを演算処理するア
ンプユニットを内設するアンプ室、そのアンプユニット
と外部電源、遠隔操作部とを接続する端子を有する端子
板ユニットを内設する端子室を、検出部ボディ側から積
層状態で形成するとともに、この端子室に臨んで前記ハ
ウジング本体の側部に前記各端子に選択的に接続される
外部からのケーブルの引込み口を形成したことを特徴と
する差圧・圧力発信器。(1) A detection unit body comprising a pressure receiving unit and a means for sensing the pressure received and sending a detection signal, and a detection unit body that is connected and fixed to the tip of a cylindrical connection unit extending from the detection unit body. The transmitter housing includes a housing body having a substantially bottomed cylindrical shape and a lid body that closes the open end of the housing body, and a detection signal from the detection body side is received within the transmitter housing. An amplifier room that houses an amplifier unit that performs calculation processing, and a terminal room that houses a terminal board unit that has terminals that connect the amplifier unit, an external power source, and a remote control unit are formed in a stacked manner from the detection unit body side. At the same time, a differential pressure/pressure transmitter characterized in that a lead-in port for an external cable selectively connected to each of the terminals is formed on a side of the housing body facing the terminal chamber.
送出する手段を備えてなる検出部ボディと、この検出部
ボディから延設された円筒状連結部の先端部に連結して
固定される略有底円筒状を呈するハウジング本体および
その開口端を閉塞する蓋体からなる発信器ハウジングと
を備えてなり、この発信器ハウジング内に、前記検出部
ボディ側からの検出信号を受信しこれを演算処理するア
ンプユニットを内設するアンプ室、そのアンプユニット
と外部電源、遠隔操作部とを接続する端子を有する端子
板ユニットを内設する端子室、その端子板ユニットを介
して前記アンプユニットからの出力信号を表示する指示
計を内設するメータ室を、検出部ボディ側から積層状態
で形成するとともに、その指示計をハウジング外部から
目視可能とする透明板を、前記ハウジングの一部に設け
たことを特徴とする差圧・圧力発信器。(2) A detection unit body comprising a pressure receiving unit and a means for sensing the pressure received and transmitting a detection signal, and a detection unit body that is connected and fixed to the tip of a cylindrical connection unit extending from the detection unit body. The transmitter housing includes a housing body having a substantially bottomed cylindrical shape and a lid body that closes the open end of the housing body, and a detection signal from the detection body side is received within the transmitter housing. an amplifier room that houses an amplifier unit that performs arithmetic processing; a terminal room that houses a terminal board unit that has terminals that connect the amplifier unit to an external power source and a remote control unit; A meter chamber containing an indicator that displays the output signal from the sensor is formed in a laminated state from the detection body side, and a transparent plate that allows the indicator to be viewed from the outside of the housing is provided as a part of the housing. A differential pressure/pressure transmitter characterized by the following:
状連結部の先端部に連結して固定される略有底円筒状を
呈するハウジング本体およびその開口端を閉塞する蓋体
からなる発信器ハウジングを備えてなり、この発信器ハ
ウジングを構成するハウジング本体を、円筒状部材とそ
の一端開口部に連設されかつ円筒状部材とは異なる材料
により形成された底蓋部材とで構成するとともに、これ
ら円筒状部材と底蓋部材とを、耐圧防爆指針に適合する
隙間と奥行長さとを有する結合部を介して一体的に連結
したことを特徴とする差圧・圧力発信器。(3) Consisting of a housing body that has a substantially bottomed cylindrical shape and is connected to and fixed to the tip of a cylindrical connecting part that extends from the detection part body that is equipped with a pressure receiving part, and a lid that closes the open end of the housing body. The transmitter housing includes a housing main body that includes a cylindrical member and a bottom cover member that is connected to an opening at one end of the cylindrical member and is made of a material different from that of the cylindrical member. Also, a differential pressure/pressure transmitter characterized in that the cylindrical member and the bottom cover member are integrally connected via a connecting portion having a gap and a depth that conforms to the pressure-resistant and explosion-proof guidelines.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1140774A JP2517396B2 (en) | 1989-06-02 | 1989-06-02 | Differential pressure / pressure transmitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1140774A JP2517396B2 (en) | 1989-06-02 | 1989-06-02 | Differential pressure / pressure transmitter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH036435A true JPH036435A (en) | 1991-01-11 |
JP2517396B2 JP2517396B2 (en) | 1996-07-24 |
Family
ID=15276440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1140774A Expired - Lifetime JP2517396B2 (en) | 1989-06-02 | 1989-06-02 | Differential pressure / pressure transmitter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2517396B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05288627A (en) * | 1992-04-06 | 1993-11-02 | Yamatake Honeywell Co Ltd | Electric apparatus structure |
JPH0643535U (en) * | 1992-11-16 | 1994-06-10 | 山武ハネウエル株式会社 | Differential pressure / pressure transmitter |
JP2016001125A (en) * | 2014-06-11 | 2016-01-07 | 横河電機株式会社 | converter |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6841795B2 (en) * | 2018-06-27 | 2021-03-10 | 長野計器株式会社 | Physical quantity measuring device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01165435U (en) * | 1988-05-13 | 1989-11-20 |
-
1989
- 1989-06-02 JP JP1140774A patent/JP2517396B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01165435U (en) * | 1988-05-13 | 1989-11-20 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05288627A (en) * | 1992-04-06 | 1993-11-02 | Yamatake Honeywell Co Ltd | Electric apparatus structure |
JPH0643535U (en) * | 1992-11-16 | 1994-06-10 | 山武ハネウエル株式会社 | Differential pressure / pressure transmitter |
JP2016001125A (en) * | 2014-06-11 | 2016-01-07 | 横河電機株式会社 | converter |
US9807896B2 (en) | 2014-06-11 | 2017-10-31 | Yokogawa Electric Corporation | Converter |
Also Published As
Publication number | Publication date |
---|---|
JP2517396B2 (en) | 1996-07-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2414788B1 (en) | Flow meter unit with water-tight casing | |
US4653330A (en) | Pressure transmitter housing | |
EP3052899B1 (en) | Process variable transmitter with dual compartment housing | |
US6119524A (en) | Measuring indicator device | |
CN110726422B (en) | Sensor | |
US5363690A (en) | Gas detection apparatus | |
JPH036435A (en) | Differential-pressure and pressure transmitter | |
EP3864379B1 (en) | Electronic flow meter with pressure sensor | |
JPH045532A (en) | Differential pressure and pressure transmitter | |
CN206399564U (en) | A kind of wireless pressure sensor | |
WO2021065554A1 (en) | Pressure detection unit and pressure sensor using same | |
JPH11118649A (en) | Pressure oscillator | |
JPH0348128A (en) | Differential pressure/pressure transmitter | |
JP2586421B2 (en) | Semiconductor pressure detector | |
JPH09159491A (en) | Site-type measuring instrument | |
KR20150131439A (en) | Device for measuring pressure | |
CN217504920U (en) | Box cover | |
JPH0364096A (en) | Pressure resistant explosionproof vessel | |
CN210741726U (en) | Pressure transmitter | |
JPH071216B2 (en) | Differential pressure / pressure transmitter | |
JPH05288627A (en) | Electric apparatus structure | |
JP2516103B2 (en) | Differential pressure / pressure transmitter | |
CN214373116U (en) | Differential pressure sensor detection device and differential pressure sensor detection system | |
CN212567538U (en) | Ultrasonic water meter | |
CN218301933U (en) | Miniaturized malleation controller structure |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080430 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080430 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090430 Year of fee payment: 13 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090430 Year of fee payment: 13 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100430 Year of fee payment: 14 |
|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100430 Year of fee payment: 14 |