JPH0348128A - Differential pressure/pressure transmitter - Google Patents
Differential pressure/pressure transmitterInfo
- Publication number
- JPH0348128A JPH0348128A JP18254889A JP18254889A JPH0348128A JP H0348128 A JPH0348128 A JP H0348128A JP 18254889 A JP18254889 A JP 18254889A JP 18254889 A JP18254889 A JP 18254889A JP H0348128 A JPH0348128 A JP H0348128A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- transmitter
- printed circuit
- detection
- leads
- 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
Links
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 238000003466 welding Methods 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000005476 soldering Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 229910000679 solder Inorganic materials 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 7
- 230000008054 signal transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction 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
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005304 joining Methods 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
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 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〕
本発明はたとえば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、特にこの発信器における検出部
との連結部構造を改良してなる差圧・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, for example, 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 The present invention relates to an improvement of a differential pressure/pressure transmitter by improving the structure of a connecting part with a detection part in this transmitter.
この種の現場設置タイプの差圧争圧力発信器は、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。This type of field-installed differential 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. can be.
たとえば実開昭81−112248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。For example, various configurations have been known in the past, such as those disclosed in Japanese Utility Model Application Publication No. 81-112248.
従来この種の差圧・圧力発信器として一般には、受圧部
等を有する検出部ボディと、この検出部ボディ側から延
設される円筒状連結部先端側に連結されかつ検出信号送
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外部電源
側に接続される端子板を内設してなる端子箱とからなる
発信器ケーシングなどを備えてなり、その内部機能部品
である感圧センサ、アンプユニット、メータ、端子板な
どは、リードやコネクタ等で適宜電気的に接続された状
態で所要の位置に収納して内設されていた。そして、こ
の種の差圧拳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、このため検
出部ボディや発信器ケーシング各部での密封構造などを
確実にし、#圧防爆構造を確実に確保し得るようになっ
ている。Conventionally, this type of differential pressure/pressure transmitter generally has a detection part body having a pressure receiving part, etc., and a cylindrical connecting part extending from the detection part body side, which is connected to the tip side and connected to a detection signal sending means. A transmitter case that is equipped with an amplifier unit that is connected to the amplifier unit and an indicator (hereinafter referred to as a meter) that is selectively connected to the amplifier unit and used as an option to confirm the measured value at the installation site; It is equipped with a transmitter casing, etc., consisting of a terminal box that is integrally connected to the side of the transmitter case via a connecting part and has a terminal board connected to the external power supply side, and its internal functional parts. Certain pressure-sensitive sensors, amplifier units, meters, terminal boards, and the like are housed and housed in desired positions with appropriate electrical connections via leads, connectors, and the like. For safety reasons, this type of differential pressure transmitter used in oil refineries, etc. is required to have a pressure-resistant and explosion-proof structure on the outside. This ensures a sealed structure in each part of the container casing, ensuring a pressure-proof structure.
ところで、−上述したような従来の差圧・圧力発信器に
おいて2発信器ケーシングを構成する発信部ケースと検
出部ボディ側の円筒状連結部との連結部分には耐圧防爆
指針に適合する構造とすることが必要となっている。す
なわち、従来一般には、上述した検出部ボディ側の円筒
状連結部はステンレス鋼等で形成される一方、発信部ケ
ースはアルミダイキャストで形成されており、これらは
溶接接合が不適で、耐圧防爆指針に適合する隙間と奥行
長さをもって連結部を構成しなければならない、このた
め、上述した発信部ケースにおいて検出部ボディ側から
延設される円筒状連結部が嵌込まれる貫通孔との嵌込み
部分の長さを確保するために、従来一般には発信部ケー
ス内に突出する内側ボス部を設け、この内部に円筒状連
結部を前述した防爆隙間と奥行長さをもって嵌込んで固
定する等の構造が採用されていた。By the way, - in the conventional differential pressure/pressure transmitter as mentioned above, the connecting part between the transmitting part case and the cylindrical connecting part on the detecting part body side, which constitute the two transmitter casings, has a structure that complies with the flameproof and explosion-proof guidelines. It is necessary to do so. In other words, conventionally, the cylindrical connection part on the detection part body side mentioned above is made of stainless steel, etc., while the transmitter case is made of aluminum die-casting, which is not suitable for welding and is not suitable for flameproof and explosion-proof construction. The connecting portion must be configured with a gap and depth that match the guideline. Therefore, in the transmitter case described above, the cylindrical connecting portion extending from the detector body side must fit into the through hole into which the connecting portion is fitted. In order to secure the length of the included part, conventionally, an inner boss part was generally provided that protruded into the transmitter case, and the cylindrical connecting part was fitted and fixed inside this part with the above-mentioned explosion-proof gap and depth. structure was adopted.
しかしながら、このような従来構造では、発信部ケース
の形状等が複雑化し、またこれに円筒状連結部を嵌込ん
で固定し、さらに発信部側のアンプユニットと結線接続
する等の作業が面倒かつ煩雑となるもので、このような
問題点を解決し得る何らかの対策を講じることが必要と
されている。However, with such a conventional structure, the shape of the transmitter case becomes complicated, and the work of fitting and fixing the cylindrical connecting part into the transmitter case and further wiring and connecting it to the amplifier unit on the transmitter side is cumbersome and cumbersome. This is complicated, and it is necessary to take some measures to solve these problems.
特に、上述した従来構造では、円筒状連結部内を通って
感圧センサからの検出信号を導く手段として、フレキシ
ブルプリント基板やリード線等といった可撓性を有する
゛ものを用いており、発信部ケース内のスペース等で配
設位置が制限されるアンプユニットを構成するプリント
基板等との結線が行なえるような構成とされているが、
構成部品点数が多くなり1組立工数も増大し、取扱いが
不便であった。さらに、このような結線構造では、セン
サからのリード部間での絶縁性を保つために、ボッティ
ング等を行なったりすることも必要で1作業工数等の面
から問題であった。また、センサ目体のインピータンス
が小さい場合にはそれ程問題とはならないが、絶縁が悪
くなると、センサノイズとして出力に混入する結果とな
り、センサからプリン)X板上での増幅回路等への入力
部までの絶縁性を確保することに充分な注意を払い、ノ
イズを避けることが必要とされるもので、このような問
題点をも一掃することが望まれている。In particular, in the conventional structure described above, a flexible material such as a flexible printed circuit board or a lead wire is used as a means for guiding the detection signal from the pressure-sensitive sensor through the cylindrical connecting part. The configuration is such that it can be connected to the printed circuit board, etc. that makes up the amplifier unit, where the installation position is limited due to internal space, etc.
The number of component parts increased, the number of man-hours per assembly increased, and handling was inconvenient. Furthermore, in such a wiring structure, it is necessary to perform botting or the like in order to maintain insulation between the leads from the sensor, which is problematic in terms of the number of man-hours required. Also, if the impedance of the sensor's eye is small, this will not be such a problem, but if the insulation deteriorates, it will be mixed into the output as sensor noise, and the input from the sensor to the amplifier circuit on the X board etc. It is necessary to pay sufficient attention to ensuring insulation up to the parts and to avoid noise, and it is desired to eliminate such problems.
さらに、この種の差圧・圧力発信器にあっては、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
を図り、しかも組立性や配線昨の作業性などを向上させ
得ること等が望まれるもので、このような点をも考慮し
なければならない。Furthermore, in this type of differential pressure/pressure transmitter, the entire instrument can be made smaller, lighter and more compact, and the cost can be lowered, and the ease of assembly and wiring work can be improved. etc., and these points must also be taken into consideration.
上述した要請に応えるために1本発明に係る差圧・圧力
発信器は、受圧部での受圧圧力を感知して検出信号を送
出する手段を内設しかつこの手段からの信号伝達用リー
ドを有する円筒状連結部を受圧部から突設してなる検出
部ボディと、その円筒状連結部の先端が嵌込まれる開口
部を底M側に形成しかつこの底蓋側に前記検出信号を受
信して演算処理を行なう信号処理回路を有するプリント
基板からなるアンプユニットを内設してなる発信器ハウ
ジングを備えてなり、このハウジングの少なくとも開口
部が形成される底蓋部分を検出部ボディ側と溶接可能な
材料で形成し1円筒状連結部の先端を開口部に嵌込んで
溶接固定するとともに、ハウジング内に臨む円筒状連結
部先端から導出される複数のリードに対し、アンプユニ
71・となるプリント基板を、その基板面がリードに直
交するように配設し、直接半田付けで結線接続したもの
である。また、本発明によれば、上述した構成による差
圧・圧力発信器において、ハウジング内に臨んで円筒状
連結部先端から導出される複数本のリードが差込まれて
半田付は接続される複数個の接続孔が穿設されるプリン
ト基板に対し、各接続孔を有する部分が別々の分割片−
ヒに位置するように複数のスリットを形成したものであ
る。In order to meet the above-mentioned demands, a differential pressure/pressure transmitter according to the present invention is provided with a means for sensing the pressure received at the pressure receiving part and transmitting a detection signal, and a signal transmission lead from this means. A detecting unit body having a cylindrical connecting part protruding from the pressure receiving part, an opening into which the tip of the cylindrical connecting part is fitted is formed on the bottom M side, and the detection signal is received on the bottom cover side. The transmitter housing includes an amplifier unit made of a printed circuit board having a signal processing circuit that performs arithmetic processing. It is made of a weldable material, and the tip of the cylindrical coupling part is fitted into the opening and fixed by welding, and serves as an amplifier unit 71 for the plurality of leads led out from the tip of the cylindrical coupling part facing inside the housing. A printed circuit board is arranged so that the board surface is perpendicular to the leads, and wire connections are made by direct soldering. Further, according to the present invention, in the differential pressure/pressure transmitter having the above-described configuration, a plurality of leads facing inside the housing and led out from the tip of the cylindrical connecting part are inserted and a plurality of leads are connected by soldering. For a printed circuit board on which several connection holes are drilled, the part with each connection hole is a separate piece.
A plurality of slits are formed so as to be located at the center.
本発明によれば、検出部ボディ側の円筒状連結端先端を
、発信器ハウジング底蓋部分の開口部に嵌込み、これら
を溶接して固定するとともに、ハウジング内において前
記円筒状連結端先端から突出している検出部からの信号
伝送用リードに、基板面を直交させてアンプユニットを
構成するプリント基板を載置させ、その基板面上の回路
に前記ノードを直接半田付けで接続することにより、検
出部と発信器側との結線接続を行なえる。According to the present invention, the tip of the cylindrical connecting end on the detection unit body side is fitted into the opening of the bottom cover portion of the transmitter housing, and these are fixed by welding, and the tip of the cylindrical connecting end on the side of the detector body is fitted into the opening of the bottom cover portion of the transmitter housing, and these are fixed by welding. By placing the printed circuit board constituting the amplifier unit with the board surface orthogonal to the protruding signal transmission lead from the detection section, and directly connecting the node to the circuit on the board surface by soldering, Wire connection can be made between the detection unit and the transmitter side.
第1図ないし第4図は本発明に係る差圧・圧力発信器の
一実施例を示し、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(差圧発信器を例示する)は、第1
図等から明らかなように受圧部として一対のバリアダイ
ヤフラム2a。FIGS. 1 to 4 show an embodiment of the differential pressure/pressure transmitter according to the present invention, and in these figures, the differential pressure/pressure transmitter is designated as a whole by the symbol l (the differential pressure transmitter is exemplified). is the first
As is clear from the figures, a pair of barrier diaphragms 2a serve as pressure receiving parts.
2bを有しこれらバリアダイヤフラムで感知された二つ
の流体圧間での差圧を検出する感圧センサ3等を内蔵し
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先端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およびその開口端閉
塞用の蓋体12からなる発信器ハウジングlOを備えて
いる。2b and a detection unit body 4 having a built-in pressure sensor 3 etc. that detects the differential pressure between the two fluid pressures sensed by these barrier diaphragms, and a cylinder protruding 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 tip of the connecting portion 5, and a lid body 12 for closing the open end of the housing body 11.
なお、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・ナツトにより締結されて一体的
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、これら圧力室にバリアダイヤフラム2a、2bを介
して対面し感圧センサ3までの間に圧力伝達媒体が封入
されてなる一対の側圧室aa、abが形成され、これら
側圧室はセンタダイヤフラム2Cで画成される。As is well known, the detection unit body 4 is integrally assembled by fastening a plurality of divided bodies with a port nut, and two types of fluid pressures to be measured are inserted into the body through an inlet 6a, an inlet 6a, Pressure chamber 6.7 introduced from 7a
A pair of side pressure chambers aa and ab are formed in which a pressure transmission medium is sealed between the pressure chambers and the pressure sensor 3, facing each other via the barrier diaphragms 2a and 2b, and these side pressure chambers are connected to the center diaphragm 2C. It is defined by
また、円筒状連結部5は、金属製筒体5aとその内側筒
体5bからなり、この内側筒体5bには感圧センサ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。ここで、この
検出部ボディ4での検出部構成やその作用効果等は従来
から周知の通りで、その詳細な説明は省略する。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 signal extraction leads for guiding the detection signal from the pressure sensor 3 to the outside. 9 protrudes from the tip of the connecting portion 5 while being sealed with a hermetic seal or the like. Here, the configuration of the detection section in the detection section body 4 and its functions and effects are conventionally well known, and detailed explanation thereof will be omitted.
また1本実施例では、上述した検出部側の円筒状連結部
5先端部に連結さ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信号処
理回路を有する複数枚のプリント回路基板21a、21
b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、そのアンプ二
二ッ)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が実装されているプリント基板(端子板)
24による端子板ユニー、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2
7を内設するメータ室28を、検出部ボディ4側から積
層状態となるように形成している。さらに、端子室26
に臨んでハウジング本体11の側部には。In addition, in this embodiment, the transmitter housing 10 connected to the tip of the cylindrical connecting part 5 on the detection part side has a structure that complies with the pressure-resistant explosion-proof guidelines by the housing body 11 and the lid body 12, and A plurality of printed circuit boards 21a, 21 each have a signal processing circuit therein that receives a detection signal from the detection body 4 side and performs arithmetic processing on the signal.
an amplifier chamber 22 in which an amplifier unit 21 consisting of an electric component 21c mounted therein is housed, and a plurality of terminals 23a for connecting the amplifier 21) to an external power source and a remote control section (not shown); A printed circuit board (terminal board) on which a terminal block 23 and a plurality of electrical components 24a are mounted.
A terminal chamber 26 in which a terminal board unit 24 and a terminal 25 are installed.
, and a meter 2 which is optionally used selectively.
A meter chamber 28 in which the sensor 7 is installed is formed in a stacked state from the detection unit body 4 side. Furthermore, the terminal chamber 26
On the side of the housing main body 11 facing the.
各端子23aに選択的に接続される外部からのケーブル
29a 、29aの引込み口29を形成しており、また
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30を、ハウジング蓋体12に開口した開口部30
a内側に耐圧防爆指動を満足する状態で設けている。な
お、29bはケーブル29a 、29aを内設し引込み
口29に螺合して設けられるケーブル保護管である。A transparent plate 30 is provided in the housing lid 12 to form a lead-in port 29 for external cables 29a, 29a selectively connected to each terminal 23a, and to make the meter 27 visible from outside the housing 10. opening 30
A is provided on the inside in a condition that satisfies pressure-resistant and explosion-proof conditions. In addition, 29b is a cable protection tube which is provided by internally disposing the cables 29a and 29a and being screwed into the lead-in port 29.
また、上述した発信器ハウジング10を構成するハウジ
ング本体11を、ケーブル引込み口29を有する円筒状
部材40とその一端開口部を閉塞するように連結される
カップ状底蓋部材41とで構成するとともに、この底蓋
部材41側にアンプユニッ)21、端子板ユニット25
等を積層して固定り、、かつこの底蓋部材41に円筒状
部材40を回動可能に嵌装し、耐圧防爆指針に適合する
隙間と奥行長さとをもって一体的に連結するようにし、
さらに)、述りまた端子板ユニット25を介してアンプ
ユニット21からの出力信号を表示するメータ27をオ
プションと17で用いる際に、これをハウジング本体1
1を構成する底蓋部材41側に選択的に内設して固定し
、ている、なお、この実施例では、透明板30を蓋体1
2内側にセットリング30bで組付は固定する一方、メ
ータ27を、底蓋部材41側に固定される端子板ユニッ
ト25側から立設される六角スタッド31に対しねじ止
め固定した場合を示している。さらに、図中31aは六
角スタツト31を貫通するボルト31bがねじ止めされ
る固定台である。Further, the housing body 11 constituting the transmitter housing 10 described above is constituted by a cylindrical member 40 having a cable lead-in port 29 and a cup-shaped bottom cover member 41 connected to close one end opening of the cylindrical member 40. , an amplifier unit) 21 and a terminal board unit 25 are installed on this bottom cover member 41 side.
etc. are stacked and fixed, and the cylindrical member 40 is rotatably fitted to the bottom cover member 41, so that they are integrally connected with a gap and a depth that conform to the flameproof explosion-proof guidelines,
Furthermore, when using the meter 27 that displays the output signal from the amplifier unit 21 via the terminal board unit 25 as an option, this is connected to the housing body 1.
In this embodiment, the transparent plate 30 is selectively installed inside and fixed to the bottom lid member 41 side constituting the lid body 1.
2 shows a case in which the meter 27 is fixed with a set ring 30b inside, and the meter 27 is screwed and fixed to a hexagonal stud 31 that stands up from the terminal board unit 25 side that is fixed to the bottom cover member 41 side. There is. Furthermore, 31a in the figure is a fixing base to which a bolt 31b passing through the hexagonal stud 31 is screwed.
ここで、このような発信器ハウジングlOおよびその内
部への発信器構成部品の紹込み構造を、第1図ないし第
4図を用いて詳述する。まず、ハウジング本体11を構
成する円筒状部材40を3たとえば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形成するととも
に、これにねじ11−めで組合わせられる力7ブ状底蓋
部材41を、円筒状部材40とは溶接接合が行なえない
が前記検出部側の円筒状連結部5とは溶接接合が行なえ
る材料、たとえばステンレス鋼を絞り加工等によって形
成している。なお、40a、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周壁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でこの部分での耐圧防爆指針
に適合する隙間と奥行長さを満足するようになっている
。また、42はこれらねじ部40a、41aの螺合接合
時において所要の個所で両部材を任意の回動位置で連結
固定するための押しねじである。Here, such a transmitter housing IO and the structure for introducing the transmitter components into its interior will be described in detail using FIGS. 1 to 4. First, a cylindrical member 40 constituting the housing main body 11 is formed by casting, for example, an aluminum alloy or by casting, and a tab-shaped bottom cover member 41, which is assembled with the cylindrical member 40 with a screw 11, is attached to the cylindrical member. 40 cannot be joined by welding, but the cylindrical connecting part 5 on the detecting section side is made of a material that can be joined by welding, such as stainless steel, by drawing or the like. Note that 40a 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 circumferential wall of the bottom cover member 41 which is screwed thereto, and these are screwed together. This allows the gap and depth to meet the flameproof and explosion-proof guidelines for this part. Further, 42 is a push screw for connecting and fixing both members at a desired rotational position at a required location when the threaded portions 40a and 41a are screwed together.
さて、本発明によれば、上述したように受圧圧力を感知
して検出信号を送出する手段からの信号伝達用リード9
,9.・・・・を有する円筒状連結部5を突設してなる
検出部ボディ4と、その円筒状連結部5の先端が嵌込ま
れる開口11141bを底蓋部材41側に形成しかつこ
の底蓋部材41側に検出信号を受信して演算処理を行な
う信号処理回路を有するプリント基板21a、21bか
らなるアンプユニット21を内設してなる発信器I\ウ
ジング10を備えてなり、このハウジング10の少なく
とも開口部41bが形成される部分を底蓋部材41とし
て検出部ボディ4側と溶接可能な材料で形成し、円筒状
連結部5の先端を開口部41bに嵌込んで溶接固定する
とともに、ハウジング10(底蓋部材41)内に臨む円
筒状連結部5先端から導出される複数のリード9.9.
・・・・に対し。Now, according to the present invention, as described above, the signal transmission lead 9 from the means for sensing the received pressure and transmitting the detection signal
,9. The detection part body 4 has a cylindrical connecting part 5 projecting thereon, and an opening 11141b into which the tip of the cylindrical connecting part 5 is fitted is formed on the bottom cover member 41 side. The housing 10 is equipped with a transmitter I/Using 10 which includes an amplifier unit 21 made up of printed circuit boards 21a and 21b having a signal processing circuit for receiving detection signals and performing arithmetic processing on the member 41 side. At least the part where the opening 41b is formed is made of a material that can be welded to the detection part body 4 side as the bottom cover member 41, and the tip of the cylindrical connecting part 5 is fitted into the opening 41b and fixed by welding, and the housing A plurality of leads 9.9. led out from the tip of the cylindrical connecting portion 5 facing inside the bottom lid member 41.
Against...
アンプユニット21となるプリント基板21aを、その
基板面がリード9に直交するように配設し、直接半田付
けで結線接続したところに特徴を有している。The printed circuit board 21a, which becomes the amplifier unit 21, is disposed so that its surface is perpendicular to the leads 9, and is directly connected by soldering.
モして4 このような構成によれば、検出部ボディ4側
の円筒状連結端5先端を、発信器ハウジング10におけ
る底蓋部分の開口部41bに嵌込み、これらを溶接して
固定することにより耐圧防爆上何ら問題のない連結部構
造が得られるばかりでなく、ハウジング10内において
円筒状連結端5先端から突出している検出部側からの信
号伝送用リーヘド9,9.・・・・に、基板面を直交さ
せてアンプユニット21を構成するプリント基板21a
を、リード接続孔60 、60 、・・・・にリード9
゜9、・・・・を差込んだ状態で載置させ、その基板面
上の回路に前記リード9,91・・・・を直接半田付け
で接続することにより、検出部ボディ4と発信器ハウジ
ング10側との結線接続を行なえる。また、このような
構造では、各リード9,9.・・・・間の絶縁は確実で
あり、従来のようなポッティング等の部品点数や作業工
数の増えるという問題を一掃でき、さらにプリント基板
21a等を、ハウジング10内で底蓋部分に並設してコ
ンパクトに収納配置し得るもので、発信器全体の小型化
等に対しての効果もある。According to this configuration, the tip of the cylindrical connecting end 5 on the detection unit body 4 side can be fitted into the opening 41b of the bottom cover portion of the transmitter housing 10 and fixed by welding. This not only makes it possible to obtain a connection part structure without any problems in terms of pressure resistance and explosion-proofness, but also allows the signal transmission leads 9, 9 . ..., a printed circuit board 21a constituting the amplifier unit 21 with the board surfaces orthogonal to each other.
, connect the leads 9 to the lead connection holes 60 , 60 , ...
゜9, . . . are inserted and mounted, and the leads 9, 91, . Wiring connection can be made to the housing 10 side. Further, in such a structure, each lead 9, 9 . . . . The insulation between them is reliable, and the problem of increasing the number of parts such as potting and the number of man-hours required in the conventional method can be eliminated. Furthermore, the printed circuit board 21a etc. can be arranged side by side on the bottom cover inside the housing 10. It can be stored and arranged compactly, and has the effect of downsizing the entire transmitter.
特に、このような構成によれば、ハウジング本体11全
体を、従来の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(4側の円筒状連結部5との接台部構
造の面からも優れている。すなわち、従来のようにアル
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、7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との間な連
結する結合部に単純な溶接手段を採用することはできず
1耐圧防爆指針に適合する隙間と臭行長さを≠5つ結合
構造を採用しなければならず、またこのような耐圧防爆
指針に適合する結合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することが必要
となり、その結果結合構造が複雑化し、計器全体の大型
化や大重量化等を避けられないものであったが、これを
溶接接合とすることで耐圧防爆指針を配慮することが不
要となり、構造を簡素化し部品点数や加工1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1
度を許容し得る限度範囲内で最小限まで薄くでき、重量
軽減も図れるという利点がある。In particular, according to such a configuration, manufacturing is not only easier than in the case where the entire housing body 11 is integrally formed by casting from an aluminum alloy as in the past, but also the detection part body (4 side It is also excellent in terms of the structure of the abutment part with the cylindrical connecting part 5. That is, when the entire housing body 11 is constructed as a Gui-cast product made of aluminum alloy as in the past, it is made of 7 stainless steel or the like. Simple welding means cannot be used for the connection between the cylindrical connection part 5 on the detection part body 4 side, and a connection structure with a gap and odor line length of ≠ 5 that meets the pressure-resistant and explosion-proof guidelines is required. In addition, in order to adopt a joint structure that complies with such flameproof and explosion-proof guidelines, the boss portion that can hold the cylindrical connecting portion 5 over a predetermined length should be placed on the outside of the bottom of the housing body 11 or on the outside of the bottom of the housing body 11. As a result, the joining structure became complicated, making it unavoidable to increase the size and weight of the instrument as a whole. However, by welding the joint, the flameproof and explosion-proof guidelines were considered. This makes it possible to simplify the structure, reduce the number of parts and the number of assembly steps per process, and reduce the thickness of the bottom cover member 41 by reducing the thickness of the bottom cover member 41.
It has the advantage that it can be made as thin as possible within an allowable range, and weight can also be reduced.
ここで、上述したリード9,9.・・・・のプリント基
板21aへの結線接続部において、第5図(a) 、
(b)または第6図に示すような構成を採用すると、リ
ード9.9.・・・・とプリント基&21a側の接続孔
60 、60 、・・・・との加工上での位置ずれ等を
吸収し、リード9等に対し過度の機械的応力が加わった
すせず、適切かつ確実な結線接続を、絶縁性を確保して
行なえるとい〉利点を奏する。すなわち、第5図(a)
、(b)では、プリント基板21aの接続部において、
各接続孔60゜60、・・・・を有する部分が別々の分
割片61゜61、・・・・丘に位置するように円形孔と
放射溝とからなる複数のスリット溝82.62.・・・
・を形成するようにしている。このような構成では、各
部の絶縁性を確保する一方、リード9,9.・・・・と
の加エーヒでの位置ずれ等をも、各分割片61のもつ弾
性変形により適切かつ確実に吸収でき、しかも過大な応
力が加わることも防1F、でき、さらにこれらの結線時
の作業もきわめて簡単に行なえるという利点がある。ま
た、第6図には、放射溝と円弧溝とからなる1字状のス
リット溝62゜62、・・・・で分割片81,61.・
・・・を形成した場合を承しており、その外にもスリッ
ト溝の形状等としては種々の変形例が考えられよう、な
お、これらのスリット溝は、プリント基板21aのプレ
ス等で打抜き加工することで簡単に得られるが、勿論機
械加工で形成してもよいことは言うまでもない。Here, the above-mentioned leads 9, 9. 5(a),
(b) Or if the configuration shown in FIG. 6 is adopted, the lead 9.9. . . and the connection holes 60 , 60 , . This has the advantage that proper and reliable wire connections can be made while ensuring insulation. That is, FIG. 5(a)
, (b), at the connection part of the printed circuit board 21a,
A plurality of slit grooves 82, 62, consisting of circular holes and radial grooves, such that the portions having the connecting holes 60, 60, . . . are located on separate divided pieces 61, 61, . ...
・We are trying to form a In such a configuration, while ensuring the insulation of each part, the leads 9, 9 . ... can be appropriately and reliably absorbed by the elastic deformation of each divided piece 61, and also prevents excessive stress from being applied. It has the advantage of being extremely easy to perform. Further, in FIG. 6, there are divided pieces 81, 61, .・
In addition to this, there are various other possible variations in the shape of the slit grooves, etc. These slit grooves can be formed by punching the printed circuit board 21a by pressing, etc. Although it can be easily obtained by doing this, it goes without saying that it may also be formed by machining.
また、上述した実施例においてハウジング本体11の底
蓋部材41内に、アンプユニット21を収容配置するた
めのアンプ室22を形成するとともに、このアンプ室2
2内に配置される各種電気部品に対しての外部からのノ
イズ対策として底蓋部材41開口部にシールド板43を
嵌込んで固定しており、さらにその中央部の大径な開口
部43eをシールド機能をもつ金属箔46で壇うように
している。なお、44は3Cはこのシールド板43両面
間を連通して電気的に接続するための連通端子、45は
このシールド板43上に設けられ端子ユニット25等を
組付けるための端子台スペーサである。さらに、47は
アンプ室22内で複数枚のプリント基板21a、21b
を所定間隔をおいて積層した状態で保持する保持具であ
る。Further, in the embodiment described above, an amplifier chamber 22 for accommodating and arranging the amplifier unit 21 is formed in the bottom cover member 41 of the housing body 11, and this amplifier chamber 2
A shield plate 43 is fitted and fixed in the opening of the bottom cover member 41 as a countermeasure against noise from the outside for various electrical components arranged inside the bottom cover member 41, and a large diameter opening 43e in the center thereof is fixed. The platform is made of metal foil 46 which has a shielding function. In addition, 44 is a communication terminal 3C for communicating and electrically connecting both sides of this shield plate 43, and 45 is a terminal block spacer provided on this shield plate 43 for assembling the terminal unit 25 etc. . Furthermore, 47 is a plurality of printed circuit boards 21a and 21b inside the amplifier chamber 22.
This is a holder that holds the sheets stacked at predetermined intervals.
また、50は上述したアンプ室22に連続する端子室2
6内において端子板ユニット25のプリント基板24の
端子台23実装面上に、外部ノイズ阻止用部品24aや
回路面を覆うように被せられるケーブルガイド機能をも
つ保護カバーで。Further, 50 is a terminal chamber 2 that is continuous with the amplifier chamber 22 described above.
6, a protective cover having a cable guide function is placed over the mounting surface of the terminal block 23 of the printed circuit board 24 of the terminal board unit 25 so as to cover the external noise blocking component 24a and the circuit surface.
この保護カバー50の側縁部でケーブル引込ミロ29に
近接する部分には、ケーブル29aを端子台23側に導
くような案内面、たとえば引込み口29側に傾斜して折
曲げられた傾斜案内面50aが形成されている。さらに
、52.53は基板24とメータ27とを電気的に接続
するためのコネクタである。At the side edge of the protective cover 50, in a portion close to the cable lead-in mirror 29, there is a guide surface that guides the cable 29a toward the terminal block 23, for example, an inclined guide surface that is bent toward the lead-in port 29. 50a is formed. Furthermore, 52 and 53 are connectors for electrically connecting the board 24 and the meter 27.
以上の構成によれば、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lOを構成するハウジング本
体11の底蓋部材41を連結して設け、かつ検出部ボデ
ィ4側から底蓋部材41に対しアンプ二二一2)21.
端子板ユニー2ト25、さらに選択的にメータ27等の
内部a能部品を積層状態で組込んで配設するとともに、
この底蓋部材41に対し円筒状部材40を耐圧防爆指針
に適合する隙間と奥行長さをもって回動可能に嵌装する
ことで、ハウジンク本体11を簡単に組立てでき、その
開口端を蓋体12で閉塞することで、耐圧防爆構造をも
ち、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かでさる。According to the above configuration, the cylindrical connecting portion 5 of the detection body 4
The bottom cover member 41 of the housing body 11 constituting the transmitter housing 10 is connected to the tip side, and the amplifier 2212)21.
The terminal board unit 25 and optionally internal functional parts such as the meter 27 are assembled and arranged in a stacked state, and
By rotatably fitting the cylindrical member 40 into the bottom cover member 41 with a gap and depth that meet the pressure-resistant and explosion-proof guidelines, the housing main body 11 can be easily assembled, and its open end can be attached to the cover body 12. This makes it possible to obtain a differential pressure/pressure transmitter that has a pressure-resistant explosion-proof structure, simplifies the overall configuration, and can be made smaller and lower in cost.
なお、本発明は上述した実施例構造に限定されず、発信
器l各部の形状、構造等を、適宜変形。Note 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 l can be modified as appropriate.
変更することは自由で、種々の変形例が考えられよう。It is free to change, and various modifications may be considered.
〔発明の効果)
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、受圧圧力を感知し検出信号を送出する手段からの
信号伝達用リードを有する円筒状連結部を受圧部から突
設してなる検出部ボディと、その円筒状連結部の先端が
嵌込まれる開口部を底蓋側に形成しかつこの底蓋側に前
記検出信号を受信して演算処理を行なう信号処理回路を
有するプリント基板からなるアンプユニットを内設して
なる発信器ハウジングを備えてなり、このハウジングの
少なくとも開口部が形成される底蓋部分を検出部ボディ
側と溶接可能な材料で形成し1円筒状連結部の先端を開
口部に嵌込んで溶接固定するとともに、ハウジング内に
臨む円筒状連結部先端から導出される複数のリードに対
し、アンプユニットとなるプリント基板を、その基板面
がリードに直交するように配設し、直接半田付けで結線
接続したので、簡単かつ安価な構成にもかかわらず、#
圧防爆構造を必要とする検出部と発信器との連結部構造
を簡素化し、構成部品点数や作業工数等を削減し、しか
も適切かつ確実な連結部構造とすることができる。また
、本発明によれば、1述したハウジング内に臨んで円筒
状連結部先端から導出される複数本のリードが差込まれ
て半田付は接続される複数個の接続孔が穿設されるプリ
ント基板に対し、各接続孔を有する部分が別々の分割片
上に位置するように複数のスリットを形成したので、リ
ードとの結線接続をきわめて簡単かつ適切に行なえ、し
かも多少の加工誤差等は分割片のもつ柔軟性により吸収
でき、過度の応力がリードに加わったり、絶縁性が害さ
れる等の問題も一掃することができる。[Effects of the Invention] As explained above, according to the differential pressure-pressure transmitter according to the present invention, the cylindrical connecting portion having the signal transmission lead from the means for sensing the pressure receiving pressure and transmitting the detection signal is connected to the pressure receiving portion. A signal processing device that includes a detection unit body protruding from the bottom cover, and an opening into which the tip of the cylindrical connection part is fitted is formed on the bottom cover side, and receives the detection signal on the bottom cover side and performs arithmetic processing. It comprises a transmitter housing in which an amplifier unit made of a printed circuit board having a circuit is installed, and at least a bottom cover portion of the housing in which an opening is formed is made of a material that can be welded to the detection body side. The tip of the cylindrical connection part is fitted into the opening and fixed by welding, and the printed circuit board that will become the amplifier unit is connected to the multiple leads led out from the tip of the cylindrical connection part facing inside the housing, with the board surface facing the leads. Because the wires are arranged perpendicular to the wires and connected by direct soldering, despite the simple and inexpensive configuration, #
The structure of the connection between the detector and the transmitter, which requires a pressure-proof structure, can be simplified, the number of component parts and the number of work steps can be reduced, and an appropriate and reliable connection structure can be achieved. Further, according to the present invention, a plurality of connection holes are formed facing into the housing mentioned above, into which a plurality of leads led out from the tip of the cylindrical connection part are inserted and connected by soldering. Since multiple slits are formed on the printed circuit board so that the parts with each connection hole are located on separate pieces, connection to the leads can be made extremely easily and appropriately, and some processing errors can be avoided by separating the parts. The flexibility of the piece allows it to be absorbed, eliminating problems such as excessive stress being applied to the leads and damage to insulation.
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図はその側面図、第3図(a)、(b
)はハウジング本体を構成する底蓋部材の概略平面図お
よびその側断面図、第4図はアンプ室内の平面図、第5
図(a)、(b)は本発明を特徴づけるリードのプリン
ト基板への結線m続部の一例を示す要部平面図およびそ
の側断面図、第6図はその変形例を示す概略平面図であ
る。
1・・・・差圧・圧力発信器、4・・・・検出部ボデ化
5・・・・円筒状連結部、9−・・・リード、10・
・・・発信器ハウジング 11・・・・ハウジンク本体
、12・・・・蓋体、21・・・・アンプユニット。
21a、21b・・・・プリント71.22・・・・ア
ンプ室、40・・・・円筒状部材、41・・・・底M部
材、40a、41a・・・・ねじ部、42・・・・押し
ねじ。
60・・・・接続孔、61・・・・分割片、62・・・
・スリット溝。FIG. 1 is a side sectional view showing an embodiment of the differential pressure/pressure transmitter according to the present invention, FIG. 2 is a side view thereof, and FIGS. 3(a) and (b).
) is a schematic plan view and side sectional view of the bottom cover member constituting the housing body, FIG. 4 is a plan view of the inside of the amplifier chamber, and FIG.
Figures (a) and (b) are a plan view of the main parts and a side sectional view showing an example of the connection part of the lead to the printed circuit board that characterizes the present invention, and Fig. 6 is a schematic plan view showing a modification thereof. It is. 1... Differential pressure/pressure transmitter, 4... Detector body 5... Cylindrical connection part, 9-... Lead, 10...
... Transmitter housing 11 ... Housing body, 12 ... Lid body, 21 ... Amplifier unit. 21a, 21b...Print 71.22...Amplifier chamber, 40...Cylindrical member, 41...Bottom M member, 40a, 41a...Threaded portion, 42...・Push screw. 60... Connection hole, 61... Divided piece, 62...
・Slit groove.
Claims (2)
る手段が内設されるとともにこの手段からの信号伝達用
リードを有する円筒状連結部が受圧部から突設されてい
る検出部ボディと、この検出部ボディ側からの円筒状連
結部先端が嵌込まれる開口部が底蓋側に形成されかつ前
記検出信号を受信しその演算処理を行なう信号処理回路
が形成されるプリント基板からなるアンプユニットを前
記底蓋側に内設して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の少なくとも前記開口部が形成
される底蓋部分を、検出部ボディ側と溶接可能な材料で
形成し、前記円筒状連結部先端を開口部に嵌込んで溶接
固定するとともに、ハウジング内に臨む円筒状連結部先
端から導出される複数のリードに対し、前記アンプユニ
ットを構成するプリント基板を、その基板面がリードに
直交するように配設して直接半田付けにより結線接続し
たことを特徴とする差圧・圧力発信器。(1) A detection part in which a means for sensing the pressure received at the pressure receiving part and sending out a detection signal is installed therein, and a cylindrical connecting part having a lead for transmitting a signal from this means protrudes from the pressure receiving part. A body, a printed circuit board in which an opening into which the tip of the cylindrical connecting part from the detection body side is fitted is formed on the bottom cover side, and a signal processing circuit for receiving the detection signal and performing arithmetic processing thereof is formed. The transmitter housing includes an amplifier unit disposed inside the bottom cover, and at least a bottom cover portion of the transmitter housing in which the opening is formed is made of a material that can be welded to the detection unit body side. The tip of the cylindrical connecting portion is fitted into the opening and fixed by welding, and the printed circuit board constituting the amplifier unit is attached to a plurality of leads led out from the tip of the cylindrical connecting portion facing into the housing. A differential pressure/pressure transmitter characterized by being arranged so that the board surface is perpendicular to the leads and connected by direct soldering.
ジング内に臨む円筒状連結部の先端から導出される複数
本のリードが差込まれて半田付け接続される複数個の接
続孔が穿設されているプリント基板に対し、各接続孔を
有する部分が別々の分割片上に位置するように複数のス
リットを形成したことを特徴とする差圧・圧力発信器。(2) In claim 1, a plurality of connection holes are formed into which a plurality of leads led out from the tip of the cylindrical connection portion facing into the transmitter housing on the detection body side are inserted and connected by soldering. 1. A differential pressure/pressure transmitter, characterized in that a plurality of slits are formed in a printed circuit board provided so that portions having respective connection holes are located on separate divided pieces.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18254889A JPH0348128A (en) | 1989-07-17 | 1989-07-17 | Differential pressure/pressure transmitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18254889A JPH0348128A (en) | 1989-07-17 | 1989-07-17 | Differential pressure/pressure transmitter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0348128A true JPH0348128A (en) | 1991-03-01 |
Family
ID=16120211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18254889A Pending JPH0348128A (en) | 1989-07-17 | 1989-07-17 | Differential pressure/pressure transmitter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0348128A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110247420A1 (en) * | 2008-12-19 | 2011-10-13 | Endress +Hauser Gmbh + Co. Kg | Pressure difference measurement transmitter |
JP2012225875A (en) * | 2011-04-22 | 2012-11-15 | Azbil Corp | Pressure sensor |
-
1989
- 1989-07-17 JP JP18254889A patent/JPH0348128A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110247420A1 (en) * | 2008-12-19 | 2011-10-13 | Endress +Hauser Gmbh + Co. Kg | Pressure difference measurement transmitter |
US8726735B2 (en) * | 2008-12-19 | 2014-05-20 | Endress + Hauser Gmbh + Co. Kg | Pressure difference measurement transmitter |
JP2012225875A (en) * | 2011-04-22 | 2012-11-15 | Azbil Corp | Pressure sensor |
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