JPH07174659A - Leak detection apparatus of closing mechanism in flow passage - Google Patents
Leak detection apparatus of closing mechanism in flow passageInfo
- Publication number
- JPH07174659A JPH07174659A JP31854493A JP31854493A JPH07174659A JP H07174659 A JPH07174659 A JP H07174659A JP 31854493 A JP31854493 A JP 31854493A JP 31854493 A JP31854493 A JP 31854493A JP H07174659 A JPH07174659 A JP H07174659A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- flow path
- shut
- leak detection
- leak
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、流路、殊に密閉回路流
路内の取扱液を締切る締切り機構における液の漏洩を検
出する漏洩検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leak detection device for detecting a leak of a liquid in a flow path, in particular, in a shut-off mechanism that shuts off a liquid to be handled in a closed circuit flow path.
【０００２】[0002]
【従来の技術】一般に、例えば図７に示す透析装置にお
いて、その透析液循環系１０は、透析液供給系１２およ
び廃液排出系１４をそれぞれ締切り機構（開閉器）１
６、１６を介して接続された密閉回路１８により構成さ
れている。なお、この透析装置において、密閉回路１８
に設けたを循環ポンプ（往復動定量ポンプ）２０により
循環送液される一定量の透析液は、透析器２４の透析膜
２４ａを介して接触する血液循環系２２内の血液より老
廃物および水分（不要物）を分離回収し、この不要物を
含む廃液として排出系１４から排出されると共に、新し
い透析液が透析液供給系１２より補給されるよう構成さ
れている。2. Description of the Related Art Generally, for example, in a dialysis apparatus shown in FIG. 7, a dialysis fluid circulation system 10 includes a dialysis fluid supply system 12 and a waste fluid discharge system 14, each having a shutoff mechanism (switch) 1.
The closed circuit 18 is connected via 6 and 16. In this dialysis device, the closed circuit 18
The fixed amount of dialysate circulated by the circulation pump (reciprocating metering pump) 20 provided in the blood circulation system 22 is a waste product and a water content from the blood in the blood circulation system 22 which is contacted via the dialysis membrane 24a of the dialyzer 24. (Unnecessary substances) are separated and collected, and discharged as a waste liquid containing the unnecessary substances from the discharge system 14, and a new dialysate is supplied from the dialysate supply system 12.
【０００３】しかるに、このような透析液循環系１０に
おいて、開閉器１６において液の漏洩が発生すると、す
なわち密閉回路１８内での液漏洩が発生すると、密閉回
路１８内の循環透析液の性状が変化し、このため過除水
或いは逆濾過（透析液が血液中に入り込む）等の不都合
が発生する。そこで、このような密閉回路１８には、一
般的に漏洩チェック装置２６を付設して、開閉器１６の
締切り状態において密閉回路１８内に圧力を負荷した
後、その圧力降下をチェックすることにより、前記不都
合、すなわち密閉回路１８での液漏洩をチェックするよ
う構成されている。また、この種の回路１８において
は、往復動定量ポンプ２０の流量が変化した場合におい
ても、前記と同様の不都合が発生するので、このポンプ
２０に対しても、同様にその定量性をチェックする装置
（図示せず）を設けることができる。However, in such a dialysate circulation system 10, when liquid leakage occurs in the switch 16, that is, when liquid leakage occurs in the closed circuit 18, the properties of the circulating dialysate in the closed circuit 18 change. Therefore, inconveniences such as excessive removal of water or back filtration (dialysis fluid entering blood) occur. Therefore, a leak check device 26 is generally attached to such a closed circuit 18, and after the pressure is applied to the closed circuit 18 in the closed state of the switch 16, the pressure drop is checked. It is configured to check the above-mentioned inconvenience, that is, liquid leakage in the closed circuit 18. Further, in the circuit 18 of this type, even when the flow rate of the reciprocating metering pump 20 changes, the same inconvenience as described above occurs, so that the quantizing property of the pump 20 is also checked. A device (not shown) can be provided.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前述し
た透析液を循環させる密閉回路における前記漏洩チェッ
ク装置は、以下に述べるような難点があった。However, the above-mentioned leakage check device in the above-mentioned closed circuit for circulating the dialysate has the following drawbacks.
【０００５】すなわち、前記漏洩チェック装置は、先ず
第１に、そのチェック作動中には透析液の循環を停止し
なければならないので、その間は透析が一時中止され
る。このため、連続的な漏洩監視が実際的には不可能と
なり、治療安全性の上で大きな難点を有していた。ま
た、前記チェック装置は、殊に圧力センサ部が高価とな
り且つ全体的に複雑となる欠点を有していた。That is, in the leak checking device, firstly, the circulation of the dialysate must be stopped during the check operation, so that the dialysis is temporarily stopped during that period. For this reason, continuous leakage monitoring is practically impossible, and there is a big problem in terms of treatment safety. In addition, the above-mentioned checking device has the drawback that the pressure sensor part is expensive and the overall structure is complicated.
【０００６】そこで、本発明の目的は、連続的に液の漏
洩をチェックすることができると共に、多用途且つ比較
的簡単な構造からなる流路内締切り機構の漏洩検出装置
を提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a leak detecting device for a flow path shut-off mechanism which is capable of continuously checking the leak of liquid and has a versatile and relatively simple structure. .
【０００７】[0007]
【課題を解決するための手段】先の目的を達成するため
に、本発明に係る流路内締切り機構の漏洩検出装置は、
流路内の取扱液を締切る締切り機構からなり、前記取扱
液を電解質溶液とする共に、前記締切り機構の締切り部
を電気絶縁材により構成し、前記締切り部近傍の上流側
流路および下流側流路内にそれぞれ電極を配設し、これ
らの電極に対しそれぞれ発振回路および受信回路を接続
配置して前記締切り部の漏洩を検出する漏洩検出部を構
成することを特徴とする。In order to achieve the above-mentioned object, a leakage detection device for a flow path shutoff mechanism according to the present invention comprises:
It consists of a shut-off mechanism that shuts off the handling liquid in the flow path, and the handling liquid is an electrolyte solution, and the shut-off portion of the shut-off mechanism is made of an electrically insulating material. It is characterized in that an electrode is arranged in each of the flow paths, and an oscillating circuit and a receiving circuit are respectively connected to these electrodes to constitute a leak detecting section for detecting a leak in the shutoff section.
【０００８】この場合、受信回路は、電流−電圧変換回
路部、絶対値増幅回路部および積分回路部からなり、締
切り部の締切り状態における前記積分回路部の積分電圧
レベルから漏洩状態の検出を行うよう構成することがで
きる。In this case, the receiving circuit is composed of a current-voltage converting circuit section, an absolute value amplifying circuit section and an integrating circuit section, and detects the leak state from the integrated voltage level of the integrating circuit section in the shut-off state of the shut-off section. Can be configured as follows.
【０００９】また、締切り機構は、開閉器の締切り部か
ら構成し、漏洩検出部を、前記開閉器の入口流路部およ
び出口流路部に設けた電極を介して接続される発振回路
および受信回路より構成することができる。Further, the shut-off mechanism is composed of a shut-off portion of the switch, and the leakage detection unit is connected to the oscillator circuit and the receiving circuit connected via electrodes provided in the inlet flow passage portion and the outlet flow passage portion of the switch. It can be composed of a circuit.
【００１０】代案として、締切り機構は、往復動定量ポ
ンプにおける一対のチャッキ弁から構成し、各チャッキ
弁に対する漏洩検出部を、前記往復動定量ポンプの吸込
み側流路部、ポンプ室および吐出側流路部にそれぞれ設
けた電極を介してそれぞれ接続される受信回路、発振回
路および受信回路をそれぞれ組合せて構成し、各漏洩検
出部により締切り部の漏洩を検出すると共に、前記往復
動定量ポンプの吐出速度を検出するよう構成することも
できる。As an alternative, the shut-off mechanism is composed of a pair of check valves in the reciprocating metering pump, and the leak detecting section for each chuck valve is provided with a suction side flow path section, a pump chamber and a discharge side flow of the reciprocating metering pump. A receiving circuit, an oscillating circuit, and a receiving circuit, which are connected to each other via electrodes provided in the respective path portions, are configured in combination, and the leakage of the shutoff portion is detected by each of the leakage detection portions, and the discharge of the reciprocating metering pump. It can also be configured to detect speed.
【００１１】[0011]
【作用】本発明によれば、漏洩検出部は、電気絶縁性締
切り部の上流側流路および下流側流路に配置した電極に
それぞれ接続した発振回路および受信回路により構成す
ることができる。従って、前記締切り部に漏洩が発生す
ると、この漏洩状態は、これによって流動する電解質溶
液からなる取扱液を介して、前記漏洩検出部に電気的
に、すなわち即刻且つ連続的に検出することができる。
なお、このように構成される漏洩検出装置は、各種の往
復動定量ポンプに適宜装着することにより、ポンプ室に
おける漏洩およびポンプ吐出速度を同時に検出すること
が可能である。According to the present invention, the leak detecting section can be composed of an oscillating circuit and a receiving circuit respectively connected to the electrodes arranged in the upstream flow path and the downstream flow path of the electrically insulating cutoff section. Therefore, when a leak occurs in the shutoff portion, the leaked state can be detected electrically, that is, immediately and continuously, in the leak detecting portion via the handling liquid composed of the electrolyte solution flowing thereby. .
The leak detection device configured as described above can detect leaks in the pump chamber and pump discharge speed at the same time by properly mounting the leak detection device on various reciprocating metering pumps.
【００１２】[0012]
【実施例】次に、本発明に係る流路内締切り機構の漏洩
検出装置の実施例につき、添付図面を参照しながら以下
詳細に説明する。なお、説明の便宜上、図７に示す従来
の構造と同一の構成部分には同一の参照符号を付し、詳
細な説明は省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a leak detection device for a flow path shutoff mechanism according to the present invention will be described in detail below with reference to the accompanying drawings. For convenience of explanation, the same components as those of the conventional structure shown in FIG. 7 are designated by the same reference numerals, and detailed description thereof will be omitted.
【００１３】先ず、本発明の流路内締切り機構の漏洩検
出装置における、前記流路内締切り機構は、前述したよ
うに、例えば図７における透析液循環系１０の密閉回路
１８に係る締切り機構、すなわち開閉器１６或いは各種
の往復動定量ポンプを対象とするものである。そして、
これらに対する漏洩検出装置は、同じく前述したことか
ら理解されるように、開閉器１６に関しては漏洩の検出
のみを行い、一方往復動定量ポンプに関してはポンプ室
における漏洩およびポンプ吐出速度の双方の検出を行う
ものである。First, as described above, in the leakage detecting device for the flow path shutoff mechanism of the present invention, the flow path shutoff mechanism is, for example, the shutoff mechanism related to the closed circuit 18 of the dialysate circulation system 10 in FIG. That is, it is intended for the switch 16 or various reciprocating metering pumps. And
As will be understood from the above, the leak detection device for these devices only detects leaks with respect to the switch 16 while detecting both leaks in the pump chamber and pump discharge speed with respect to the reciprocating metering pump. It is something to do.
【００１４】そこで、本発明の第１の実施例としては、
開閉器（例えば、廃液排出系流路１４内の廃液を締め切
る締切り機構）１６に係る漏洩検出装置を図１に示す。
先ず、本実施例においては、取扱液は電解質溶液からな
り、開閉器１６の締切り部（図示せず）は電気絶縁材に
より構成されている。そして、開閉器１６の入口（上流
側）流路部１４ａおよび出口（下流側）流路部１４ｂに
は、それぞれ電極３０ａ、３０ｂを配置し、これら電極
３０ａ、３０ｂに対して、発振回路３２および受信回路
３４を接続配置する。そして、これら発振回路３２と受
信回路３４とは、後に詳述する漏洩検出部３６を構成す
る。ここで、電極３０ａ、３０ｂは、好適には、その材
質が劣化に強く且つ安定性に優れたカーボン、チタン等
から構成し、その形状は圧損が少なく且つ取付け性に優
れたリング形状に構成すれば好適である。また、発振回
路３２において出力する信号の発振周波数および発振波
形は、好適には周囲に対するノイズの影響を考慮して、
１〜１０ＫＨｚのサイン波に設定する。Therefore, as a first embodiment of the present invention,
FIG. 1 shows a leakage detection device related to a switch (for example, a shutoff mechanism that shuts off the waste liquid in the waste liquid discharge system flow path 14).
First, in this embodiment, the liquid to be handled is an electrolyte solution, and the shutoff portion (not shown) of the switch 16 is made of an electrically insulating material. Then, electrodes 30a and 30b are respectively arranged in the inlet (upstream side) flow path portion 14a and the outlet (downstream side) flow path portion 14b of the switch 16, and the oscillation circuit 32 and the electrode 30a and 30b are arranged to the electrodes 30a and 30b. The receiving circuit 34 is connected and arranged. Then, the oscillation circuit 32 and the reception circuit 34 constitute a leak detection unit 36 described in detail later. Here, the electrodes 30a and 30b are preferably made of carbon, titanium, or the like whose material is resistant to deterioration and excellent in stability, and the shape thereof may be a ring shape with little pressure loss and excellent attachment. Is suitable. Further, the oscillation frequency and the oscillation waveform of the signal output from the oscillation circuit 32 are preferably set in consideration of the influence of noise on the surroundings.
Set to a sine wave of 1 to 10 KHz.
【００１５】このような構成からなる前記開閉器１６の
漏洩検出部３６においては、流路１４内において取扱液
が流動すると、この電解質溶液からなる取扱液を介し
て、発振回路３２から出力される電流値としての発振信
号ｃが、受信回路３４に対する電圧値としての受信信号
Ｖとして伝達される。しかるに、この場合、前記受信回
路３４は、図２に示すように、電流−電圧変換回路部３
４ａ、絶対値増幅回路部３４ｂおよび積分回路部３４ｃ
から構成されており、従って前記受信信号Ｖは、図３に
示すように、電流値としての発振信号ｃが、電流−電圧
変換回路部３４ａおよび絶対値増幅回路部３４ｂを介し
て、電圧値としてのサイン波形信号Ｖ′および絶対値の
増幅波形信号Ｖ″に変換された後、更に積分回路部３４
ｃにおいて電圧値としての積分波形信号Ｖに変換される
よう構成されている。なお、電圧値としての信号Ｖ
（Ｖ′、Ｖ″）の大きさは、取扱液である電解質水溶液
の電導度の大きさに従って増大する。In the leak detecting section 36 of the switch 16 having such a structure, when the handling liquid flows in the flow path 14, it is output from the oscillation circuit 32 via the handling liquid consisting of this electrolyte solution. The oscillation signal c as a current value is transmitted as a reception signal V as a voltage value to the receiving circuit 34. However, in this case, the receiving circuit 34, as shown in FIG.
4a, absolute value amplification circuit section 34b and integration circuit section 34c
Therefore, as shown in FIG. 3, the received signal V is an oscillation signal c as a current value, and a voltage value as an oscillation signal c via the current-voltage conversion circuit section 34a and the absolute value amplification circuit section 34b. Is converted into a sine waveform signal V ′ and an absolute value amplified waveform signal V ″, and then further integrated circuit section 34
In c, it is configured to be converted into an integrated waveform signal V as a voltage value. The signal V as a voltage value
The magnitude of (V ′, V ″) increases according to the magnitude of the conductivity of the aqueous electrolyte solution that is the handled liquid.
【００１６】そして、この開閉器１６において、締切り
部が正常に作動して流路１４が完全に閉止されると、す
なわち取扱液である電解質水溶液の流動が完全に遮断さ
れると、発振信号ｃの伝達は完全に遮断される。従っ
て、漏洩検出部３６における前記遮断時の受信信号Ｖ1
は、図４に示すように、その大きさがほぼ０の電圧レベ
ルＶ1 に設定される。なお、図中の受信信号Ｖ2 は、開
閉器（締切り部）１６の開状態における電圧レベルＶ2
を示す。しかるに、ここで開閉器１６が、その閉状態に
おいても完全に閉止されない場合には、すなわち取扱液
が漏洩している場合には、発振信号ｃは僅かではあるが
伝達される。従って、この時の受信信号Ｖ3 は、前記遮
断受信信号Ｖ1 より僅かに大きい電圧レベル（Ｖ1 ＋Δ
Ｖ）に設定される。従って、この漏洩受信信号Ｖ3 にお
ける前記増大電圧レベルΔＶをチェックすることによ
り、開閉器１６の漏洩状態を検出することができる。In the switch 16, when the shutoff portion operates normally and the flow path 14 is completely closed, that is, when the flow of the electrolyte aqueous solution which is the handling liquid is completely cut off, the oscillation signal c is generated. Transmission is completely cut off. Therefore, the reception signal V 1 at the time of the interruption in the leakage detection unit 36
Is set to a voltage level V 1 whose magnitude is approximately 0, as shown in FIG. The received signal V 2 in the figure is the voltage level V 2 in the open state of the switch (shutoff portion) 16.
Indicates. However, when the switch 16 is not completely closed even in the closed state, that is, when the handled liquid is leaking, the oscillation signal c is transmitted although it is slight. Therefore, the reception signal V 3 at this time has a voltage level (V 1 + Δ) that is slightly higher than the cutoff reception signal V 1.
V). Therefore, the leakage state of the switch 16 can be detected by checking the increased voltage level ΔV in the leakage reception signal V 3 .
【００１７】このように、本発明によれば、開閉器（流
路内締切り機構）の漏洩を電気的に検出することができ
るので、例えば透析装置における透析液を循環させる密
閉回路において、その透析液の漏洩を、透析操作を中断
することなく、連続的にしかも簡単に監視することが可
能となる。従って、透析治療の効果および安全性を向上
することができる。また、本発明装置は、比較的簡単且
つ安価に構成し得る利点を有する。As described above, according to the present invention, it is possible to electrically detect the leakage of the switch (intra-channel shut-off mechanism), so that, for example, the dialysis is performed in a closed circuit for circulating a dialysate in a dialysis machine. It becomes possible to monitor the leakage of liquid continuously and easily without interrupting the dialysis operation. Therefore, the effect and safety of dialysis treatment can be improved. Further, the device of the present invention has an advantage that it can be constructed relatively easily and inexpensively.
【００１８】図５は、本発明の第２の実施例として、往
復動定量ポンプＰ（例えば、除水系に設ける除水ポン
プ）の漏洩検出装置を示すものである。本実施例は、往
復動定量ポンプＰのポンプ室５０において、所定の周期
ΔＴ（図６参照）で開閉動作する吸込み側チャッキ弁４
０ａおよび吐出側チャッキ弁４０ｂの漏洩と、前記周期
ΔＴ（ポンプ速度）自体とを同時に検出するよう構成し
たものである。FIG. 5 shows, as a second embodiment of the present invention, a leak detecting device for a reciprocating metering pump P (for example, a dewatering pump provided in a dewatering system). In this embodiment, in the pump chamber 50 of the reciprocating metering pump P, the suction side check valve 4 that opens and closes at a predetermined cycle ΔT (see FIG. 6).
0a and the leakage of the discharge side check valve 40b and the period ΔT (pump speed) itself are simultaneously detected.
【００１９】先ず、本実施例においても、取扱液は電解
質溶液からなると共に、チャッキ弁４０ａ、４０ｂ（締
切り部）を電気絶縁材により構成していることは、前述
の実施例と同様である。そして、前記両チャッキ弁４０
ａ、４０ｂに対するそれぞれ上流側および下流側の位
置、すなわち往復動定量ポンプＰの吸込み側流路部１８
ａ、ポンプ室５０および吐出側流路部１８ｂには、それ
ぞれ電極３０ａ、３０ｃ、３０ｂを配置して、各電極３
０ａ、３０ｃ、３０ｂに対し、それぞれ受信回路４２、
発振回路４４および受信回路４６を接続配置する。そし
て、前記受信回路４２と発振回路４４とによって、チャ
ッキ弁４０ａに対する漏洩検出部４８を構成すると共
に、前記発振回路４４と受信回路４６とによってチャッ
キ弁４０ｂに対する漏洩検出部４９を構成している。First, also in this embodiment, the handling liquid is composed of an electrolyte solution and the check valves 40a and 40b (cutoff portions) are made of an electrically insulating material, as in the above-mentioned embodiments. And both check valves 40
Positions on the upstream side and the downstream side with respect to a and 40b, that is, the suction side flow path portion 18 of the reciprocating metering pump P.
a, the pump chamber 50, and the discharge-side flow path portion 18b are provided with electrodes 30a, 30c, and 30b, respectively.
0a, 30c, 30b, respectively, the receiving circuit 42,
The oscillator circuit 44 and the receiver circuit 46 are connected and arranged. The receiving circuit 42 and the oscillating circuit 44 constitute a leak detecting section 48 for the check valve 40a, and the oscillating circuit 44 and the receiving circuit 46 constitute a leak detecting section 49 for the check valve 40b.
【００２０】しかるに、このように構成した前記各漏洩
検出部４８、４９は、それぞれの受信回路４２、４６
に、往復動定量ポンプＰの作動、すなわちそれぞれのチ
ャッキ弁４０ａ、４０ｂの所定周期ΔＴの動作に同期し
て、発振回路４４の発振信号ｃに対応する受信信号Ｖ
ａ、Ｖｂがそれぞれ伝達される。すなわち、図６には、
これら両受信信号Ｖａ、Ｖｂの電圧波形をそれぞれ示し
ているが、これらの電圧波形は同一種類のものであるの
で、以下に吸込み側の受信信号Ｖａについてのみ説明す
る。However, each of the leak detecting sections 48 and 49 thus configured has the receiving circuits 42 and 46, respectively.
In synchronization with the operation of the reciprocating metering pump P, that is, the operation of the check valves 40a and 40b for a predetermined period ΔT, the reception signal V corresponding to the oscillation signal c of the oscillation circuit 44 is received.
a and Vb are transmitted respectively. That is, in FIG.
The voltage waveforms of the two reception signals Va and Vb are shown respectively, but since these voltage waveforms are of the same type, only the reception signal Va on the suction side will be described below.
【００２１】すなわち、この受信信号Ｖａに関する各電
圧レベルＶa1、Ｖa3＝（Ｖa1＋ΔＶa ）、Ｖa2は、それ
ぞれ遮断時、漏洩、解放時の各受信電圧レベルを示して
いる。従って、前記漏洩受信電圧レベルＶa3＝（Ｖa1＋
ΔＶa ）における増大電圧レベルΔＶa をチェックする
ことにより、チャッキ弁４０ａでの漏洩状態を検出する
ことができ、また別に周期ΔＴをチェックすることによ
り、ポンプ速度を検出することができる。すなわち、ポ
ンプの定量性（ポンプの故障発生）を監視することがで
きる。That is, the respective voltage levels V a1 , V a3 = (V a1 + ΔV a ), V a2 related to the reception signal Va represent the respective reception voltage levels at the time of interruption, leakage and release. Therefore, the leakage reception voltage level V a3 = (V a1 +
By checking the increased voltage level ΔV a in ΔV a ), the leakage state at the check valve 40a can be detected, and by further checking the period ΔT, the pump speed can be detected. That is, it is possible to monitor the quantitative property of the pump (occurrence of pump failure).
【００２２】このようにして、本発明によれば、例えば
図７に示す透析液循環系１０や除水系において、その開
閉器１６、１６や除水ポンプ等に対して、前記と同一構
造の漏洩検出装置を設置することにより、前記循環系１
０や除水系における透析液等の漏洩および定量性を、透
析操作を中断することなく、連続的に監視することがで
きる。これにより、透析治療の効果および安全性を一層
向上することができる。In this way, according to the present invention, for example, in the dialysate circulation system 10 and the water removal system shown in FIG. By installing a detection device, the circulation system 1
It is possible to continuously monitor the leakage and the quantification of the dialysate and the like in the zero water removal system without interrupting the dialysis operation. Thereby, the effect and safety of dialysis treatment can be further improved.
【００２３】以上、本発明の好適な実施例について説明
したが、本発明は前記実施例に限定されることなく、そ
の精神を逸脱しない範囲内において多くの設計変更が可
能である。Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and many design changes can be made without departing from the spirit thereof.
【００２４】[0024]
【発明の効果】以上説明したように、本発明に係る流路
内締切り機構の漏洩検出装置は、流路内の取扱液を締切
る締切り機構からなり、前記取扱液を電解質溶液とする
共に、前記締切り機構の締切り部を電気絶縁材により構
成し、前記締切り部近傍の上流側流路および下流側流路
内にそれぞれ電極を配設し、これらの電極に対しそれぞ
れ発振回路および受信回路を接続配置して前記締切り部
の漏洩を検出する漏洩検出部を構成することにより、締
切り部における漏洩を、この漏洩によって流動する電解
質溶液からなる取扱液を介して、電気的に検出すること
ができ、締切り部からの漏洩を、流路内取扱液の流動を
停止することなく、簡単にしかも連続的に検出すること
が可能となる。As described above, the leakage detection device for the in-channel shut-off mechanism according to the present invention comprises a shut-off mechanism for shutting off the liquid to be handled in the flow channel, and uses the liquid to be treated as an electrolyte solution. The shutoff portion of the shutoff mechanism is made of an electrically insulating material, and electrodes are provided in the upstream flow passage and the downstream flow passage in the vicinity of the shutoff portion, and an oscillation circuit and a reception circuit are connected to these electrodes, respectively. By arranging and configuring a leakage detection unit that detects the leakage of the shutoff portion, the leakage at the shutoff portion can be electrically detected through a handling liquid composed of an electrolyte solution that flows due to this leakage, Leakage from the shutoff portion can be easily and continuously detected without stopping the flow of the handling liquid in the flow path.
【００２５】従って、本発明によれば、例えば透析装置
における透析液の循環系密閉回路において、透析液の漏
洩を、透析操作を中断することなく、連続的に監視する
ことが可能となる。また、透析治療の効果および安全性
を大幅に向上することができる。Therefore, according to the present invention, it is possible to continuously monitor the leakage of dialysate in a closed circuit of the dialysate circulation system in a dialyzer without interrupting the dialysis operation. In addition, the efficacy and safety of dialysis treatment can be significantly improved.
【００２６】そして、本発明に係る漏洩検出装置は、例
えば往復動定量ポンプにも適用することができ、この種
定量ポンプの定量性監視手段として広範囲に利用するこ
とができ、往復動定量ポンプの性能の向上に寄与する効
果は極めて大きい。The leak detecting apparatus according to the present invention can be applied to, for example, a reciprocating metering pump, and can be widely used as a quantitative monitoring means for this kind of metering pump. The effect of improving performance is extremely large.
【図１】本発明に係る流路内締切り機構の漏洩検出装置
の一実施例を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing an embodiment of a leakage detection device for a flow path shutoff mechanism according to the present invention.
【図２】図１に示す漏洩検出装置の受信回路を示す系統
図である。FIG. 2 is a system diagram showing a receiving circuit of the leak detection apparatus shown in FIG.
【図３】図２に示す受信回路における受信信号をそれぞ
れ示すものであって、（ａ）は電流−電圧変換回路部の
電圧波形図、（ｂ）は絶対値増幅回路部の電圧波形図、
（ｃ）は積分回路部の電圧波形図である。3A and 3B respectively show reception signals in the reception circuit shown in FIG. 2, where FIG. 3A is a voltage waveform diagram of a current-voltage conversion circuit unit, and FIG. 3B is a voltage waveform diagram of an absolute value amplification circuit unit;
(C) is a voltage waveform diagram of the integration circuit section.
【図４】図３に示す積分回路部の受信信号を更に詳細に
示す電圧波形図である。4 is a voltage waveform diagram showing the reception signal of the integration circuit unit shown in FIG. 3 in more detail.
【図５】本発明に係る流路内締切り機構の漏洩検出装置
の別の実施例を示す概略構成図である。FIG. 5 is a schematic configuration diagram showing another embodiment of the leakage detection device of the flow path shutoff mechanism according to the present invention.
【図６】図５に示す受信回路の積分回路部における受信
信号をそれぞれ示すものであって、（ａ）は吸込み側の
電圧波形図、（ｂ）は吐出側の電圧波形図である。6A and 6B respectively show reception signals in the integration circuit section of the reception circuit shown in FIG. 5, in which FIG. 6A is a voltage waveform diagram on the suction side and FIG. 6B is a voltage waveform diagram on the ejection side.
【図７】透析装置の透析液循環系と血液循環系を示す系
統図である。FIG. 7 is a system diagram showing a dialysate circulation system and a blood circulation system of a dialyzer.
１４ 流路 １４ａ 入口流路部 １４ｂ 出口流路部 １６ 開閉器 １８ 密閉回路 １８ａ 吸込み側流路部 １８ｂ 吐出側流路部 ２０ 往復動定量ポンプ ３０ａ、３０ｂ、３０ｃ 電極 ３２ 発振回路 ３４ 受信回路 ３４ａ 電流−電圧変換回路部 ３４ｂ 絶対値増幅回路部 ３４ｃ 積分回路部 ３６ 漏洩検出部 ４０ａ 吸込み側チャッキ弁 ４０ｂ 吐出側チャッキ弁 ４２、４６ 受信回路 ４４ 発振回路 ４８、４９ 漏洩検出部 ５０ ポンプ室 Ｐ 往復動定量ポンプ 14 flow path 14a inlet flow path section 14b outlet flow path section 16 switch 18 closed circuit 18a suction side flow path section 18b discharge side flow path section 20 reciprocating metering pumps 30a, 30b, 30c electrode 32 oscillator circuit 34 receiving circuit 34a current -Voltage conversion circuit section 34b Absolute value amplification circuit section 34c Integration circuit section 36 Leakage detection section 40a Suction side check valve 40b Discharge side check valve 42,46 Reception circuit 44 Oscillation circuit 48,49 Leakage detection section 50 Pump chamber P Reciprocating fixed amount pump
Claims (4)
なり、前記取扱液を電解質溶液とする共に、前記締切り
機構の締切り部を電気絶縁材により構成し、前記締切り
部近傍の上流側流路および下流側流路内にそれぞれ電極
を配設し、これらの電極に対しそれぞれ発振回路および
受信回路を接続配置して前記締切り部の漏洩を検出する
漏洩検出部を構成することを特徴とする流路内締切り機
構の漏洩検出装置。1. A shut-off mechanism for shutting off a liquid to be handled in a flow path, wherein the liquid to be handled is an electrolyte solution, and a shut-off portion of the shut-off mechanism is made of an electric insulating material, and an upstream side near the shut-off portion. Electrodes are respectively arranged in the flow path and the downstream flow path, and an oscillating circuit and a receiving circuit are respectively connected to these electrodes to configure a leak detection unit for detecting a leak in the cutoff portion. Leakage detection device for flow path shutoff mechanism.
対値増幅回路部および積分回路部からなり、締切り部の
締切り状態における前記積分回路部の積分電圧レベルか
ら漏洩状態の検出を行うよう構成してなる請求項１記載
の流路内締切り機構の漏洩検出装置。2. The receiving circuit comprises a current-voltage converting circuit section, an absolute value amplifying circuit section, and an integrating circuit section, and detects a leakage state from the integrated voltage level of the integrating circuit section in the deadline state of the deadline section. The leak detection device for a flow path shutoff mechanism according to claim 1, which is configured.
成し、漏洩検出部を、前記開閉器の入口流路部および出
口流路部に設けた電極を介して接続される発振回路およ
び受信回路より構成してなる請求項１記載の流路内締切
り機構の漏洩検出装置。3. The shut-off mechanism is composed of a shut-off portion of a switch, and the leak detection unit is connected to an oscillator circuit and a receiver connected via electrodes provided in an inlet flow passage portion and an outlet flow passage portion of the switch. The leak detection device for a flow path shutoff mechanism according to claim 1, which is configured by a circuit.
る一対のチャッキ弁から構成し、各チャッキ弁に対する
漏洩検出部を、前記往復動定量ポンプの吸込み側流路
部、ポンプ室および吐出側流路部にそれぞれ設けた電極
を介してそれぞれ接続される受信回路、発振回路および
受信回路をそれぞれ組合せて構成し、各漏洩検出部によ
り締切り部の漏洩を検出すると共に、前記往復動定量ポ
ンプの吐出速度を検出するよう構成してなる請求項１記
載の流路内締切り機構の漏洩検出装置。4. The shut-off mechanism is composed of a pair of check valves in a reciprocating metering pump, and a leak detecting section for each chuck valve is provided with a suction side flow path section, a pump chamber and a discharge side flow path of the reciprocating metering pump. The receiving circuit, the oscillating circuit, and the receiving circuit, which are connected to each other through electrodes provided in the respective parts, are configured in combination, and the leakage detection unit detects the leakage at the shutoff portion, and the discharge speed of the reciprocating metering pump. The leak detection device for the flow path shutoff mechanism according to claim 1, wherein the leak detection device is configured to detect
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31854493A JP3199938B2 (en) | 1993-12-17 | 1993-12-17 | Leak detection device for shutoff mechanism in flow passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31854493A JP3199938B2 (en) | 1993-12-17 | 1993-12-17 | Leak detection device for shutoff mechanism in flow passage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07174659A true JPH07174659A (en) | 1995-07-14 |
| JP3199938B2 JP3199938B2 (en) | 2001-08-20 |
Family
ID=18100316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31854493A Expired - Lifetime JP3199938B2 (en) | 1993-12-17 | 1993-12-17 | Leak detection device for shutoff mechanism in flow passage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3199938B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5620546B1 (en) * | 2013-06-21 | 2014-11-05 | 日機装株式会社 | Reciprocating pump |
| US11365728B2 (en) | 2017-02-24 | 2022-06-21 | Quanta Dialysis Technologies Ltd. | Testing rotor engagement of a rotary peristaltic pump |
| US11571499B2 (en) | 2015-12-30 | 2023-02-07 | Quanta Dialysis Technologies Ltd. | Dialysis machine |
| US11583618B2 (en) | 2014-06-02 | 2023-02-21 | Quanta Dialysis Technologies Limited | Method of heat sanitization of a haemodialysis water circuit using a calculated dose |
| US11660382B2 (en) | 2016-12-23 | 2023-05-30 | Quanta Dialysis Technologies Limited | Valve leak detection system |
| USRE49881E1 (en) | 2013-03-28 | 2024-03-26 | Quanta Fluid Solutions Ltd. | Re-use of a hemodialysis cartridge |
-
1993
- 1993-12-17 JP JP31854493A patent/JP3199938B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE49881E1 (en) | 2013-03-28 | 2024-03-26 | Quanta Fluid Solutions Ltd. | Re-use of a hemodialysis cartridge |
| JP5620546B1 (en) * | 2013-06-21 | 2014-11-05 | 日機装株式会社 | Reciprocating pump |
| WO2014203994A1 (en) | 2013-06-21 | 2014-12-24 | 日機装株式会社 | Reciprocating pump |
| US20160097384A1 (en) * | 2013-06-21 | 2016-04-07 | Nikkiso Company Limited | Reciprocating pump |
| US11583618B2 (en) | 2014-06-02 | 2023-02-21 | Quanta Dialysis Technologies Limited | Method of heat sanitization of a haemodialysis water circuit using a calculated dose |
| US11571499B2 (en) | 2015-12-30 | 2023-02-07 | Quanta Dialysis Technologies Ltd. | Dialysis machine |
| US11660382B2 (en) | 2016-12-23 | 2023-05-30 | Quanta Dialysis Technologies Limited | Valve leak detection system |
| US11365728B2 (en) | 2017-02-24 | 2022-06-21 | Quanta Dialysis Technologies Ltd. | Testing rotor engagement of a rotary peristaltic pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3199938B2 (en) | 2001-08-20 |
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