WO2013002032A1 - サンプリング装置 - Google Patents
サンプリング装置 Download PDFInfo
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- WO2013002032A1 WO2013002032A1 PCT/JP2012/065199 JP2012065199W WO2013002032A1 WO 2013002032 A1 WO2013002032 A1 WO 2013002032A1 JP 2012065199 W JP2012065199 W JP 2012065199W WO 2013002032 A1 WO2013002032 A1 WO 2013002032A1
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- WIPO (PCT)
- Prior art keywords
- sampling
- liquid
- cap
- channel
- housing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
- G01N1/2035—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials by deviating part of a fluid stream, e.g. by drawing-off or tapping
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
- G01N1/2035—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials by deviating part of a fluid stream, e.g. by drawing-off or tapping
- G01N2001/2064—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials by deviating part of a fluid stream, e.g. by drawing-off or tapping using a by-pass loop
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
Definitions
- the present invention relates to a sampling device, and more particularly to a sampling device in which contamination of a sampling site is prevented.
- Patent Document 2 describes a method of collecting a dialysis solution or the like by inserting an injection needle into an elastic body built in a sample port mounting member.
- sampling can be performed without using an injection needle, and when sampling is not performed, contamination of the sampling site is prevented with a removable cap, and bacterial growth is suppressed by immersing the periphery of the sampling site in liquid.
- "Sampling ports” that can be used are disclosed (for example, Patent Document 3 and Patent Document 4).
- Patent Documents 3 and 4 or the sampling ports of the same kind as described above when sampling is not performed for the purpose of cleaning the sampling portion, the mainstream is again passed through the sampling portion and its surroundings from the main flow path.
- the circulation flow that returns to the channel is formed, the sampling channel is thin, and the shape of the sampling site and the surrounding channel is complicated, so that it is difficult for the liquid to flow from the main channel to the sampling channel. It is difficult to obtain a desirable circulating flow that does not stagnate and flows into the sampling channel from the main channel and returns to the main channel for cleaning.
- the liquid flow in the sampling channel is easily affected by the flow rate of the liquid, the installation conditions and mounting position of the sampling port itself (upward, sideways, downward, etc.), fluid pressure fluctuations, etc. It was difficult to ensure a reliable flow.
- an object of the present invention is to provide a sampling device that prevents liquid from staying in the sampling flow path and can maintain the cleanliness of the sampling site and its surroundings appropriately.
- a sampling device branches from a main flow path composed of a liquid inflow path and a liquid outflow path, and a branch portion provided between the liquid inflow path and the liquid outflow path.
- a housing having a sampling flow path with one end formed at the open end;
- a cap that is detachable from the housing and covers an open end of the sampling channel;
- the sampling channel is provided so as to be cut off from the main channel, and when the cap is attached to the housing, or when the cap is removed from the housing, the opening end of the sampling channel is provided.
- the flow path cross-sectional area in the venturi section is narrowed at the throat section.
- the liquid is accelerated and the pressure decreases.
- the cap is attached to the housing in this state, the valve body is disconnected from the main flow path of the sampling flow path, and a part of the liquid flowing through the main flow path flows into the sampling flow path to open the sampling flow path. After passing through the bypass from the end through the inside of the cap, it merges with the rest of the liquid flowing through the main flow path at the throat of the venturi. At this time, as described above, a relative negative pressure is generated in the venturi throat due to the reduced pressure.
- the sampling flow path In the flow path leading to the venturi section of the venturi section via the bypass path, a flow that constantly sucks liquid from the bypass path side to the venturi section is generated due to the differential pressure, and liquid stagnation and air accumulation occur in this flow path. Is prevented. As a result, the propagation of bacteria in this flow path and the accumulation of components in the liquid are suppressed, and the cleanliness of the flow path is properly maintained.
- the sampling channel is blocked by the valve body that is urged to block the sampling channel from the main channel. Liquid overflow is prevented. Then, when the liquid sampling means is attached to the opening end of the sampling flow path, the blocking of the sampling flow path by the valve body is released, and a part of the liquid flowing through the main flow path passes through the sampling flow path and the liquid sampling means And sampling is performed. After the sampling operation is completed, when the liquid sampling means is removed from the opening end of the sampling flow path, the sampling flow path is again blocked by the valve body, and overflow of the liquid is prevented.
- the cleanliness of the sampling channel can be maintained by attaching a cap to the housing and allowing the liquid to flow in the sampling channel. Even when the cap is temporarily removed for implementation, overflow of the liquid from the sampling channel is prevented, and the sampling operation can be performed quickly.
- the pressure difference between the throat and the sampling flow path is generated even when the pressure of the liquid flowing in the flow path is low, and does not depend on the direction of the flow path.
- Stable liquid flow that is less affected by changes in the installation conditions and mounting posture of the apparatus, fluctuations in the flow rate and pressure of the liquid, and the like and is not affected by changes in the installation conditions and operating conditions of the apparatus can be realized.
- a stable flow through the sampling flow path is realized with a simple structure without using an auxiliary power source or the like, an increase in the size and complexity of the sampling device can be avoided, and an increase in manufacturing cost is suppressed.
- the sampling apparatus is effective not only during normal operation but also when cleaning is performed by circulating a cleaning liquid throughout the liquid processing system including the sampling apparatus. That is, by performing the above-described cleaning process with the cap mounted on the housing of the sampling device, a part of the cleaning liquid flows into the sampling channel, and the sampling channel, the inside of the cap, and the bypass channel are cleaned. . Even when the cleaning liquid flows in the main flow path and the sampling flow path in this way, the flow of the cleaning liquid is generated by the differential pressure in the flow path from the sampling flow path to the throat of the venturi section via the bypass path. The cleaning operation of the sampling channel is performed quickly and effectively, and the cleaning time is shortened and the cleanliness is improved. The same effect is exhibited also when disinfecting the whole liquid processing system by distributing a disinfecting liquid instead of the cleaning liquid.
- the structure of the bypass path is not particularly limited.
- the bypass path may be formed inside the housing or may be formed outside the housing.
- the bypass path is closed when the cap is detached from the housing, and the bypass path is released when the cap is attached to the housing.
- a valve member is provided to prevent overflow of liquid from the bypass passage and inflow of air from the bypass passage to the venturi portion when the cap is attached and detached.
- the bypass passage is provided with a check valve for preventing a back flow from the throat portion of the venturi portion.
- the sampling apparatus according to the present invention can be suitably used particularly for sampling dialysate and dialysis water, which require strict cleanliness.
- the above sampling apparatus has a structure having detection means for detecting the attached / detached state of the cap or / and the liquid sampling means (hereinafter also simply referred to as “sampling means”) depending on the amount of displacement of the valve body. Is preferably adopted. If the sampling device is not equipped with a cap, the sampling site provided with the sampling channel is exposed to the atmosphere, and the sampling channel is not cleaned by the liquid flowing in from the bypass channel, so that the sampling site is contaminated. There is a possibility that the sampling device is left in a state where there is a possibility. By providing detection means capable of detecting the cap attachment / detachment status and monitoring forgetting to attach the cap, the possibility of such contamination at the sampling site is prevented and the cleanliness of the sampling flow path is more maintained. Certainly achieved.
- Examples of such detection means include an optical sensor, a limit switch, and a reed switch.
- a method of detecting the displacement of the valve body not only a method of directly detecting the displacement of the valve body itself but also an indirect by detecting the displacement of a member (for example, a valve body receiver) that is interlocked with the displacement of the valve body.
- a method of detecting the displacement of the valve body can be used.
- the sampling channel is communicated with the main channel and the throat of the venturi unit, and a constant liquid flow is generated in the sampling channel.
- the cap is attached to prevent the occurrence of air accumulation in the sampling channel, the retention of liquid, and the contact with the outside air, and the cleanliness of the sampling channel is properly maintained.
- the differential pressure between the throat of the venturi section and the sampling flow path is generated even when the pressure of the liquid flowing through the main flow path is low, so it is less affected by changes in the installation and operating conditions of the device. A stable liquid flow is ensured in the sampling flow path, and a sampling apparatus having excellent installation flexibility and operational stability is realized.
- the liquid flow in the sampling flow path can be realized without using an auxiliary power source, the complexity and size of the apparatus and the increase in manufacturing cost can be suppressed. Further, by providing a detection means for detecting the cap attachment / detachment state and / or the sampling means attachment / detachment state and monitoring forgetting to attach the cap, the cleanliness of the sampling flow path can be more reliably maintained.
- FIG. 3 is an enlarged longitudinal sectional view in which the vicinity of a valve member of the sampling device of FIG. 2 is enlarged. It is a longitudinal cross-sectional view of the sampling apparatus which concerns on the 3rd embodiment of this invention.
- FIG. 5 is an equipment system diagram showing a water circulation system for performing an operation test of the sampling device of FIG. It is a longitudinal cross-sectional view of the sampling apparatus which concerns on the 4th embodiment of this invention.
- FIG. 1A and 1B show a sampling device according to a first embodiment of the present invention, in which FIG. 1A shows a state where a cap is attached to the housing of the sampling device, and FIG. 1B shows a state where the cap is removed from the housing of the sampling device.
- the housing 2 is provided with a main flow path 3 in which a liquid inflow path 4, a branching section 5, and a liquid outflow path 6 having a venturi section 7 are communicated in this order.
- the housing 2 branches from the branch portion 5 and branches from the sampling flow path 9 that can open to the outside of the housing 2 when the cap is detached and the throat portion 8 of the venturi portion 7.
- a screw portion 13 is formed on the outer peripheral surface of the housing 2, and an opening end portion 10 of the sampling channel 9 and an opening portion 12 of the bypass channel 11 are formed by a cap 30 that is detachably screwed to the screw portion 13. Covered.
- the screw portion 13 is provided with a seal material 14. When the cap 30 is attached to the screw portion 13, the seal material 14 is pressed against the inner peripheral surface of the cap 30, whereby the internal space 31 of the cap 30. The airtightness of the liquid is ensured and liquid leakage is prevented.
- the main flow channel side end 15 of the sampling flow channel 9 is formed in a shape protruding into the branch portion 5, and the liquid flow channel 4 and the liquid flow channel 6 are provided around the sampling flow channel 9 in the branch portion 5.
- An annular channel 16 that communicates is formed.
- a valve body 17 capable of opening and closing the main flow path side end portion 15 of the sampling flow path 9 is provided in the branching portion 5 so as to face the main flow path side end portion 15. It is biased toward the end 15. Since the liquid inflow path 4, the liquid outflow path 6, and the annular flow path 16 are not blocked by the valve body 17, the main flow path side end 15 of the sampling flow path 9 is blocked by the valve body 17.
- the liquid flowing through the liquid inflow path 4 can flow into the liquid outflow path 6 via the annular flow path 16 that bypasses the periphery of the sampling flow path 9.
- a moving rod 19 is accommodated in the sampling flow path 9 so as to be slidable along the inner peripheral wall surface of the sampling flow path 9, and the branching portion side end of the moving rod 19 is in contact with the valve element 17. Yes.
- the cross-sectional shape of the moving rod 19 is formed in a substantially cross shape, and four passages are defined in the sampling channel 9 by the moving rod 19. Note that the shape of the moving rod 19 is not limited to the above, and it is sufficient that the liquid can pass through the sampling channel 9 while the moving rod 19 is housed in the sampling channel 9.
- the cap 30 is provided with a pin 32, and when the cap 30 is screwed to the threaded portion 13 of the housing 2, the moving rod 19 pressed by the pin 32 resists the urging by the spring 18 and the valve element 17. , The sampling channel 9 is released from being blocked, and the sampling channel 9 is in communication with the main channel 3.
- the remaining portion of the liquid that has flowed into the liquid inflow path 4 flows into the sampling flow path 9 through the main flow path side end 15 in the branching section 5, passes through the internal space 31 of the cap 30 and the bypass path 11, At the throat portion 8 of the venturi portion 7, it merges with most of the liquid flowing through the main flow path 3.
- relative negative pressure is generated in the throat portion 8 of the venturi portion 7 due to the liquid flowing through the main flow path 3, so that the throat from the sampling flow path 9 via the bypass path 11 is generated.
- a liquid flow is always generated in the flow path leading to the portion 8 due to the suction force accompanying the differential pressure with the main flow path, and liquid stagnation and air accumulation in the flow path are prevented.
- the internal space 31 of the cap 30, and the bypass path 11 the growth of bacteria in these flow paths and the accumulation of components in the liquid are suppressed.
- the cleanliness of the flow path is properly maintained.
- a sampling means for example, a syringe (not shown) is attached to the open end 10 of the sampling flow path 9, The liquid in the passage 9 is collected.
- the valve body 17 is moved to the sampling channel 9 by the action of the spring 18 as shown in FIG.
- the main channel side end 15 is closed. By this closing, the sampling flow path 9 is blocked from the main flow path 3 and the overflow of liquid from the open end 10 is prevented.
- the communication between the liquid inflow path 4 and the liquid outflow path 6 is ensured by the annular flow path 16 provided in the branch portion 5, so that the cap 30 is removed and the sampling flow path 9 becomes the main flow path 3.
- the flow from the liquid inflow path 4 to the liquid outflow path 6 is continued even in a state where it is blocked from the liquid.
- a sampling means for example, a syringe is attached to the open end 10 of the sampling flow path 9, and when the movable rod 19 is pressed by pressing the syringe with or after mounting, the valve element 17 is moved to the spring 18.
- the sampling passage 9 is released from being blocked by the valve body 17.
- a part of the liquid flowing through the main channel 3 flows into the sampling channel 9 from the main channel side end 15 and the liquid is accommodated in the syringe.
- valve body 17 When the collection of the liquid is completed and the syringe is removed, the valve body 17 is pushed toward the main flow path side end 15 of the sampling flow path 9 by the action of the spring 18, and the sampling flow path 9 is again blocked from the main flow path 3. Thus, overflow of liquid from the open end 10 is prevented.
- the configuration of the sampling device 1 is also effective when a cleaning liquid is circulated in the liquid processing system including the sampling device 1 instead of the liquid to clean the entire liquid processing system. That is, by performing the above-described cleaning process with the cap 30 attached to the housing 2 of the sampling device 1, a part of the cleaning liquid flowing through the main channel 3 flows into the sampling channel 9, and only in the main channel 3. In addition, the cleaning liquid is caused to flow through the sampling flow path 9, the internal space 31 of the cap 30, and the bypass path 11.
- FIG. 2 and 3 show a sampling device according to a second embodiment of the present invention, and in particular, a bypass path is provided inside the housing and the bypass path is closed when the cap is detached from the housing. And the example in which the valve member which cancels
- the housing 102 is provided with a main flow path 3 in which a liquid inflow path 4, a branching section 5, and a liquid outflow path 6 having a venturi section 7 are communicated in this order.
- a sampling flow path 9 branched from the branch portion 5 and opened to the outside of the housing 102 and a bypass passage 111 branched from the throat portion 8 of the venturi portion 7 and opened to the outside of the housing 102 are formed.
- a valve member 140 capable of opening and closing the bypass passage 111 is accommodated in the bypass passage 111.
- a screw portion 13 is formed on the outer peripheral surface of the housing 102, and the opening end portion 10 of the sampling channel 9 and the opening portion of the bypass channel 111 are covered by a cap 30 that is detachably screwed to the screw portion 13. It has been broken.
- the screw portion 13 is provided with a seal material 14. When the cap 30 is attached to the screw portion 13, the seal material 14 is pressed against the inner peripheral surface of the cap 30, whereby the internal space 31 of the cap 30. The airtightness of the liquid is ensured and liquid leakage is prevented.
- FIG. 3 is an enlarged cross-sectional view in which the vicinity of the valve member 140 of the sampling device 101 shown in FIG. 2 is enlarged.
- FIG. 3 (A) shows a state in which the cap 30 is attached to the housing 102, and FIG. A state where the cap 30 is detached from the housing 102 is shown.
- the bypass passage 111 includes an inflow hole 141 that opens to the outside of the housing 102, a valve chamber 142 that has an opening to the branch portion 5, and a venturi portion 7 provided in the liquid outflow portion 6.
- An outflow hole 143 that opens to the throat 8 is formed.
- a valve member 140 including a shaft portion 144 that is loosely inserted into the inflow hole 141, a base portion 145 that is accommodated in the valve chamber 142, and a seal portion 146 that can close the inflow hole 141 is provided in the inflow hole.
- 141 is housed movably along the axial direction of 141.
- the opening portion of the inflow hole 141 of the bypass passage 111 is covered with a cap 30 attached to the screw portion 13 of the housing 102, and the shaft portion 144 of the valve member 140 is pushed into the valve chamber side by the cap 30. .
- the valve chamber 142 accommodates a spring 148 that is supported by a set screw 147 that seals the opening of the valve chamber 142 to the branch portion 5 and biases the valve member 140 toward the inflow hole 141. Since the other configuration of the sampling apparatus 101 is the same as that of the sampling apparatus 1 shown in FIG. 1A, the same reference numerals as those in FIG.
- sampling channel 9 passes through the sampling channel 9, the internal space 31 of the cap 30, the inflow hole 141, the valve chamber 142, and the outflow hole 143 in this order, and the throat of the venturi unit 7. A flow path reaching 8 is formed.
- the remaining portion of the liquid that has flowed into the liquid inflow path 4 flows into the sampling flow path 9 through the main flow path side end 15 at the branching section 5, flows through the internal space 31 of the cap 30, the inflow hole 141, the valve chamber After passing through the bypass path 111 including 142 and the outflow hole 143, the liquid flows through the main flow path 3 at the throat 8 of the venturi section 7.
- a liquid flow is always generated in the flow path from the sampling flow path 9 to the throat 8 via the bypass path 111 due to the suction force accompanying the differential pressure with the main flow path. Occurrence of liquid stagnation and air accumulation is prevented, bacterial growth, accumulation of components in the liquid, and the like are suppressed, and the cleanliness of the flow path is properly maintained.
- both the sampling channel 9 and the bypass channel 111 are closed. That is, in the bypass passage 111, as shown in FIG. 3B, the valve member 140 biased by the spring 148 is pushed toward the inflow hole 141, so that the seal portion 146 of the valve member 140 is in the inflow hole. 141 is in pressure contact with the peripheral portion of the opening on the valve chamber 142 side, and the inflow hole 141 is closed.
- FIG. 4 shows a sampling device according to a third embodiment of the present invention.
- a bypass passage is provided outside the housing, and a check valve for preventing a backflow from the throat portion of the venturi portion is bypassed.
- the example provided in the road is shown.
- the housing 202 is provided with a main flow path 3 in which a liquid inflow path 4, a branching section 5, and a liquid outflow path 6 having a venturi section 7 are communicated in this order. 7, an inflow portion 251 is formed to communicate the throat portion 8 of the 7 and the outside of the housing 202.
- a sampling flow path 9 that branches off from the branching portion 5 and opens to the outside of the housing 202 is formed in the housing 202.
- a screw portion 13 is formed on the outer peripheral surface of the housing 202, and the open end portion 10 of the sampling channel 9 is covered with a cap 230 that is detachably screwed to the screw portion 13.
- the screw portion 13 is provided with a seal material 14. When the cap 230 is attached to the screw portion 13, the seal material 14 is pressed against the inner peripheral surface of the cap 230, whereby the internal space 231 of the cap 230. The airtightness of the liquid is ensured and liquid leakage is prevented.
- the cap 230 has a pin 232 that presses the moving rod 19 accommodated in the sampling flow path 9 toward the valve body 17 when the cap 230 is attached, and an outflow that communicates the internal space 231 of the cap 230 and the outside of the cap 230.
- a bypass passage 211 that communicates the outflow portion 250 and the inflow portion 251 formed in the housing 202 is provided outside the housing 202.
- a check valve 252 is provided in the bypass passage 211, and backflow from the throat portion 8 of the venturi portion 7 is prevented. Since the other configuration of the sampling device 201 is the same as that of the sampling device 1 shown in FIG. 1A, the same reference numerals as those in FIG.
- FIG. 6A and 6B show a sampling device 401 according to the fourth embodiment of the present invention.
- FIG. 6A shows a state in which the cap 30 is attached to the sampling device 401
- FIG. (C) has shown the state by which the syringe 402 as a liquid sampling means was attached to the sampling apparatus 401, respectively.
- the sampling device 401 is provided with an optical sensor 404 as detection means for detecting the displacement of the valve body 17 based on the displacement of the valve body receiver 403. Since the other configuration of the sampling apparatus 401 is the same as that of the sampling apparatus 1 shown in FIG. 1, the same reference numerals as those in FIG.
- the cap 30 is provided with a pin 32, and when the cap 30 is mounted on the housing 2, the moving rod 19 pressed by the pin 32 resists urging by the spring 18 as shown in FIG. Then, the valve body 17 and the valve body receiver 403 are pushed in, and the blocking between the sampling flow path 9 and the main flow path 3 by the valve body 17 is released. Further, the displacement of the valve body receiver 403 is detected by the optical sensor 404, and it is notified that the blocking of the sampling flow path 9 by the valve body 17 is released, that is, that the cap is attached.
- a syringe 402 as a sampling means is attached to the open end 10 of the sampling channel 9, and the liquid in the sampling channel 9 is collected.
- the syringe 402 is attached to the open end 10 of the sampling flow path 9 and the moving rod 19 is pressed by pressing the syringe 402 with or after the mounting, as shown in FIG.
- the body 17 and the valve body receiver 403 are pushed in against the bias of the spring 18, so that the shutoff of the sampling flow path 9 by the valve body 17 is released.
- the user can confirm whether or not the syringe 402 is securely attached.
- valve element 17 When the collection of the liquid is completed and the syringe 402 is removed, the valve element 17 is moved through the valve element receiver 403 by the action of the spring 18 as shown in FIG. It is pushed toward 15. As a result, the sampling flow path 9 is again blocked from the main flow path 3, and liquid overflow from the open end 10 is prevented, and the optical sensor 404 detects the blocking of the sampling flow path 9 and the removal of the syringe 402.
- the optical sensor 404 can detect the attachment / detachment state of the cap 30 and the attachment / detachment state of the syringe 402, it is possible to monitor forgetting to attach the cap 30. This maintains the cleanliness of the sampling channel 9 more reliably.
- the detection means for detecting the displacement of the valve element 17 is not limited to an optical sensor, and various detection means such as a limit switch and a reed switch can be appropriately employed. Also, a sampling means other than a syringe can be used.
- a colorless and transparent tube is used as the pipe 304 connecting the devices and the bypass path 211 of the sampling device 201 so that the inside of the tube can be observed.
- the following devices were used as the pump 302 and the flow meter 303.
- Pump IWAKI Magnet Gear Pump MDG-R2BB24-03A
- Flow meter TOKYO KEISO Flow meter with flow rate adjustment (range 200-700ml / min)
- Example 2 In the state where the cap 230 was attached to the sampling device 201, colored water was passed through the water circulation system 300, and the operation was confirmed. The test was carried out under two conditions of a flow rate of 200 ml / min and a flow rate of 700 ml / min, and it was visually confirmed that the colored water flows in the bypass passage 211 of the sampling device 201 under any of the conditions.
- the sampling device according to the present invention is particularly suitable as a sampling device used in a dialysis system requiring high cleanliness.
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Abstract
Description
前記ハウジングに着脱可能で前記サンプリング流路の開口端部を覆うキャップと、
前記サンプリング流路を前記主流路から遮断するように付勢されて設けられ、前記キャップが前記ハウジングに装着された際、または前記キャップが前記ハウジングから外されて前記サンプリング流路の開口端部に液体サンプリング手段が装着された際に、前記サンプリング流路と前記主流路との遮断を解除する弁体と、を備え、
液体の移送用配管途中に取付けられて配管内の液体をサンプリングするサンプリング装置であって、
前記液体流出路にベンチュリー部を設け、
前記キャップを前記ハウジングに装着した際に、前記キャップの内部と前記ベンチュリー部ののど部とを連通するバイパス路を形成したことを特徴とするものからなる。
図1は、本発明の第1の実施態様に係るサンプリング装置を示しており、(A)はサンプリング装置のハウジングにキャップが装着された状態、(B)はサンプリング装置のハウジングからキャップが取り外された状態を、それぞれ示している。図1(A)のサンプリング装置1において、ハウジング2には、液体流入路4と、分岐部5と、ベンチュリー部7を有する液体流出路6とがこの順に連通されてなる主流路3が設けられている。また、ハウジング2内には、分岐部5から分岐し、キャップが脱着された際にはハウジング2の外側へと開口可能なサンプリング流路9と、ベンチュリー部7ののど部8から分岐しハウジング2の外部へ開口するバイパス路11とが形成されている。ハウジング2の外周面にはねじ部13が形成されており、このねじ部13に着脱自在に螺合されたキャップ30によって、サンプリング流路9の開口端部10およびバイパス路11の開口部12が覆われている。ねじ部13にはシール材14が設けられており、ねじ部13にキャップ30が装着された際にこのシール材14がキャップ30の内周面に圧接されることにより、キャップ30の内部空間31の密閉性が確保され、液体の漏出が防止されている。
図1(A)に示すように、キャップ30がハウジング2のねじ部13に装着されサンプリング流路9の遮断が解除されている場合、液体流入路4へ流入した液体は、その大部分が、分岐部5において環状流路16を流れてサンプリング流路9を迂回し、液体流出路6のベンチュリー部7を通過した後、液体流出路6の終端からその先の流路へ流動する。このように主流路3に液体が流れている状態においては、ベンチュリー部7を液体が通過する際、絞り部であるのど部8において液体が加速され圧力が減少する。一方、液体流入路4へ流入した液体の残りの部分は、分岐部5において主流路側端部15を通りサンプリング流路9へ流入し、キャップ30の内部空間31およびバイパス路11を通過した後、ベンチュリー部7ののど部8にて、主流路3を流れる大部分の液体と合流する。上述のとおり、主流路3を流れる液体によりベンチュリー部7ののど部8には、上記圧力減少に伴う相対的な負圧が生じているので、サンプリング流路9からバイパス路11を経由してのど部8へ至る流路には主流路との差圧に伴う吸い込み力により常時液体の流れが発生し、この流路における液体の滞留やエアー溜まりの発生が防止される。このようにサンプリング流路9、キャップ30の内部空間31およびバイパス路11における恒常的な液体の流れが確保されることにより、これらの流路における菌の繁殖や液体内の成分の堆積等が抑制され、流路の清浄度が適正に維持される。
なお、サンプリング装置1の構成は、サンプリング装置1を含む液体処理システムに液体の代わりに洗浄液を流通させ、液体処理システム全体を洗浄する場合にも効果を発揮する。すなわち、サンプリング装置1のハウジング2にキャップ30が装着された状態にて上記の洗浄工程を行うことにより、主流路3を流れる洗浄液の一部がサンプリング流路9へ流入し、主流路3だけでなく、サンプリング流路9、キャップ30の内部空間31およびバイパス路11にも洗浄液が流される。このように主流路3およびサンプリング流路9内を洗浄液が流れる場合においても、サンプリング流路9からバイパス路11を経由してベンチュリー部7ののど部8へ至る流路には差圧により洗浄液の流れが発生するので、サンプリング流路9の洗浄作業が迅速かつ効果的に行われ、洗浄時間の短縮および清浄度の向上が図られる。
図3は、図2に示したサンプリング装置101の弁部材140付近を拡大した拡大断面図であり、図3(A)はキャップ30がハウジング102に装着された状態を、図3(B)はキャップ30がハウジング102より脱着された状態を、それぞれ示している。図3(A)において、バイパス路111は、ハウジング102の外部へ開口する流入孔141と、分岐部5への開口部を有する弁室142と、液体流出部6に設けられたベンチュリー部7ののど部8へ開口する流出孔143により構成されている。バイパス路111内には、流入孔141に遊挿される軸部144、弁室142内に収容される基部145および流入孔141を閉塞可能なシール部146により構成される弁部材140が、流入孔141の軸方向に沿って移動自在に収納されている。バイパス路111の流入孔141の開口部は、ハウジング102のねじ部13に装着されたキャップ30により覆われており、弁部材140の軸部144は、キャップ30により弁室側へ押し込まれている。また、弁室142には、弁室142の分岐部5への開口部を封止する止めねじ147により支持され、弁部材140を流入孔141側へ付勢するばね148が収納されている。なお、サンプリング装置101のその他の構成は図1(A)に示したサンプリング装置1と同様であるので、図1(A)と同一の符号を付すことにより、説明を省略する。
サンプリング装置101において、ハウジング102のねじ部13にキャップ30が螺合されると、サンプリング流路9およびバイパス路111の閉塞が解除される。すなわち、バイパス路111においては、図3(A)に示すように、キャップ30がばね148による付勢に抗して弁部材140の軸部144を押圧することにより、弁部材140がばね148側へ押し込まれ、弁部材140のシール部146による流入孔141の閉塞が解除される。一方、サンプリング流路9においては、図2に示すように、キャップ30に設けられたピン32により押圧された移動ロッド19がばね18による付勢に抗して弁体17を押し込むことにより、サンプリング流路9の主流路側端部15の遮断が解除され、サンプリング流路9が主流路3に連通された状態となる。その結果、サンプリング流路9の主流路側端部15から、サンプリング流路9、キャップ30の内部空間31、流入孔141、弁室142および流出孔143をこの順に通過してベンチュリー部7ののど部8へ到達する流路が形成される。
キャップ30がハウジング102のねじ部13に装着されている場合、液体流入路4へ流入した液体は、その大部分が、分岐部5において環状流路16を流れ、液体流出路6のベンチュリー部7を通過した後、液体流出路6の終端からその先の流路へ流動する。このような主流路3における液体の流れにより、ベンチュリー部7ののど部8には減圧による相対的な負圧が発生する。一方、液体流入路4へ流入した液体の残りの部分は、分岐部5において主流路側端部15を通りサンプリング流路9へ流入し、キャップ30の内部空間31を流れ、流入孔141、弁室142および流出孔143からなるバイパス路111を通過した後、ベンチュリー部7ののど部8にて主流路3を流れる液体と合流する。このとき、サンプリング流路9からバイパス路111を経由してのど部8へ至る流路には主流路との差圧に伴う吸い込み力により常時液体の流れが発生しているので、この流路における液体の滞留やエアー溜まりの発生が防止され、菌の繁殖や液体内の成分の堆積等が抑制され、流路の清浄度が適正に維持される。
一方、キャップ30がハウジング102のねじ部13から脱着されると、サンプリング流路9およびバイパス路111は両方とも閉塞される。すなわち、バイパス路111においては、図3(B)に示すように、ばね148によって付勢された弁部材140が流入孔141へ向けて押し込まれることにより、弁部材140のシール部146が流入孔141の弁室142側開口部の周部に圧接され、流入孔141が閉塞される。その結果、バイパス路111の流入孔141からベンチュリー部7内へのエアーの流入が遮断され、大気中の埃や微生物の侵入が防止されるため、キャップ30が取り外された状態においても、バイパス路111、ひいては主流路3の清浄度が維持される。また、サンプリング流路9においては、キャップ30の脱着により移動ロッド19の押圧が解除されるため、ばね18に付勢された弁体17によりサンプリング流路9の主流路側端部15が主流路3から遮断され、開口端部10からの液体の溢出が防止される。なお、液体流入路4と液体流出路6との連通は分岐部5に設けられた環状流路16により確保されているので、キャップ30が脱着されサンプリング流路9およびバイパス路111が閉塞された状態においても、液体流入路4から液体流出路6への流れは継続される。
図4は、本発明の第3の実施態様に係るサンプリング装置を示しており、とくに、ハウジングの外部にバイパス路が設けられるとともに、ベンチュリー部ののど部からの逆流を防止する逆止弁がバイパス路に設けられた例を示している。図4のサンプリング装置201において、ハウジング202には、液体流入路4と、分岐部5と、ベンチュリー部7を有する液体流出路6とがこの順に連通されてなる主流路3が設けられ、ベンチュリー部7ののど部8とハウジング202の外部とを連通する流入部251が形成されている。また、ハウジング202内には、分岐部5から分岐しハウジング202の外側へ開口するサンプリング流路9が形成されている。ハウジング202の外周面にはねじ部13が形成されており、このねじ部13に着脱自在に螺合されたキャップ230によって、サンプリング流路9の開口端部10が覆われている。ねじ部13にはシール材14が設けられており、ねじ部13にキャップ230が装着された際にこのシール材14がキャップ230の内周面に圧接されることにより、キャップ230の内部空間231の密閉性が確保され、液体の漏出が防止されている。キャップ230には、キャップ230装着時にサンプリング流路9内に収納された移動ロッド19を弁体17に向けて押圧するピン232と、キャップ230の内部空間231とキャップ230の外部とを連通する流出部250とが設けられており、この流出部250とハウジング202に形成された流入部251とを連通するバイパス路211が、ハウジング202の外部に設けられている。バイパス路211には逆止弁252が設けられており、ベンチュリー部7ののど部8からの逆流が防止されている。なお、サンプリング装置201のその他の構成は図1(A)に示したサンプリング装置1と同様であるので、図1(A)と同一の符号を付すことにより、説明を省略する。
サンプリング装置201のハウジング202に設けられたねじ部13へキャップ230が螺着されると、図4に示すように、キャップ230のピン232により移動ロッド19が弁体17へ向けて押圧され、弁体17がばね18の付勢に抗してばね18側へ押し込まれる。その結果、弁体17によるサンプリング流路の主流路側端部15の遮断が解除され、サンプリング流路9が主流路3に連通された状態となる。このとき、液体流入路4へ流入した液体の大部分は、環状流路16およびベンチュリー部7を通過して液体流出路6へ流れ、この流れにより、ベンチュリー部7ののど部8には減圧による相対的な負圧が発生する。一方、液体流入路4へ流入した液体の残りの部分は、分岐部5において主流路側端部15を通りサンプリング流路9へ流入し、キャップ230の内部空間232から流出部250を経由してバイパス路211を通過した後、流入部251よりベンチュリー部7ののど部8へ流入し、主流路3を流れる液体と合流する。このとき、サンプリング流路9からバイパス路211を経由してのど部8へ至る流路には差圧により常時液体の流れが発生しているので、この流路における液体の滞留やエアー溜まりの発生が防止され、菌の繁殖や液体内の成分の堆積等が抑制され、流路の清浄度が適正に維持される。
一方、キャップ230がハウジング202のねじ部13から脱着されると、キャップ230のピン232による移動ロッド19の押圧が解除されるため、ばね18の付勢により弁体17がサンプリング流路9の主流路側端部15へ向けて押し込まれ、サンプリング流路が主流路3から遮断される。なお、液体流入路4と液体流出路6との連通は分岐部5に設けられた環状流路16により確保されているので、キャップ230が脱着されサンプリング流路9が主流路3から遮断された状態においても、液体流入路4から液体流出路6への流れは継続される。
図5に示す水循環システム300を用いて、図4に示したサンプリング装置201の動作試験を行った。図5の水循環システム300においては、貯水槽301の水を水循環システム内で循環させるポンプ302と、流量計303と、サンプリング装置201とが水の流れ方向(図5の矢印方向)にこの順で設けられており、各機器は配管304により接続されている。サンプリング装置201のベンチュリー部7においては、4φ穴径(流域断面積12.56mm2)の液体流出路6内に2.8φ相当(流域断面積にして約半分)ののど部8が設けられている。また、各機器間を接続する配管304およびサンプリング装置201のバイパス路211としては無色透明な管を採用し、管内の様子が観察できるようにした。なお、ポンプ302および流量計303としては以下の機器を使用した。
ポンプ: IWAKI Magnet Gear Pump MDG-R2BB24-03A
流量計: TOKYO KEISO 流量調整付き流量計(レンジ200~700ml/min)
サンプリング装置201にキャップ230が装着された状態にて、水循環システム300に無着色水を通水し、水循環システム300内を水が正常に流れること、漏水が発生しないことを目視確認した。
サンプリング装置201にキャップ230が装着された状態において、水循環システム300に着色水を通水し、動作確認を行った。流量200ml/minおよび流量700ml/minの2種類の条件下にて試験を実施し、いずれの条件下においても、サンプリング装置201のバイパス路211内に着色水が流れることを目視確認した。
(実験3)
サンプリング装置201にキャップ230が装着された状態において、流量200ml/minにて水循環システム300に着色水を通水した。そして、通水中にバイパス路211を流入部251から脱着し、流入部251からベンチュリー部7の下流方向へエアーが流入することを目視確認することにより、流入部251に、ベンチュリー部7ののど部8方向への吸引力が働いていることを確認した。
サンプリング装置201にキャップ230が装着された状態において、バイパス路211に設けられた逆止弁252をフローメータ(図示略)と交換した。交換後、流量500ml/minにて水循環システム300に水を通水し、フローメータが回転することを確認した。
(実験5)
バイパス路211に取り付けられたフローメータを逆止弁252と交換した後、サンプリング装置201にキャップ230が装着された状態において、流量500ml/minにて水循環システム300に水を通水した。そして、通水中にキャップ230の取り外し作業を実施し、サンプリング流路9の開口端部10およびキャップ230のいずれにおいても水の溢出が発生しないことを確認した。
2、102、202 ハウジング
3 主流路
4 液体流入路
5 分岐部
6 液体流出路
7 ベンチュリー部
8 のど部
9 サンプリング流路
10 開口端部
11、111、211 バイパス路
12 開口部
13 ねじ部
14 シール材
15 主流路側端部
16 環状流路
17 弁体
18 ばね
19 移動ロッド
30、230 キャップ
31、231 内部空間
32、232 ピン
140 弁部材
141 流入孔
142 弁室
143 流出孔
144 軸部
145 基部
146 シール部
147 止めねじ
148 ばね
250 流出部
251 流入部
252 逆止弁
300 液体循環システム
301 貯液槽
302 ポンプ
303 流量計
304 配管
402 シリンジ
403 弁体受け
404 光学的センサ
Claims (7)
- 液体流入路および液体流出路からなる主流路と、前記液体流入路と前記液体流出路との間に設けられた分岐部から分岐し、一端が開口端に形成されたサンプリング流路とを有するハウジングと、
前記ハウジングに着脱可能で前記サンプリング流路の開口端部を覆うキャップと、
前記サンプリング流路を前記主流路から遮断するように付勢されて設けられ、前記キャップが前記ハウジングに装着された際、または前記キャップが前記ハウジングから外されて前記サンプリング流路の開口端部に液体サンプリング手段が装着された際に、前記サンプリング流路と前記主流路との遮断を解除する弁体と、を備え、
液体の移送用配管途中に取付けられて配管内の液体をサンプリングするサンプリング装置であって、
前記液体流出路にベンチュリー部を設け、
前記キャップを前記ハウジングに装着した際に、前記キャップの内部と前記ベンチュリー部ののど部とを連通するバイパス路を形成したことを特徴とするサンプリング装置。 - 前記バイパス路が前記ハウジングの内部に形成されている、請求項1に記載のサンプリング装置。
- 前記キャップが前記ハウジングから脱着された際に前記バイパス路を閉塞し、前記キャップが前記ハウジングに装着された際に前記バイパス路の閉塞を解除する弁部材が前記バイパス路内に設けられている、請求項2に記載のサンプリング装置。
- 前記バイパス路が前記ハウジングの外部に形成されている、請求項1に記載のサンプリング装置。
- 前記ベンチュリー部ののど部からの逆流を防止する逆止弁が前記バイパス路に設けられている、請求項4に記載のサンプリング装置。
- 前記液体が透析液または透析用水である、請求項1~5のいずれかに記載のサンプリング装置。
- 前記弁体の変位量によって、前記キャップの着脱状態または/および前記液体サンプリング手段の装脱着状態を検知する検知手段を有する、請求項1~6のいずれかに記載のサンプリング装置。
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JP2014210067A (ja) * | 2013-04-19 | 2014-11-13 | 東レ・メディカル株式会社 | 分岐ポート |
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CN108434543A (zh) * | 2018-05-28 | 2018-08-24 | 北京大学深圳医院 | 透析液取样装置 |
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- 2012-06-14 WO PCT/JP2012/065199 patent/WO2013002032A1/ja active Application Filing
- 2012-06-14 EP EP12804898.0A patent/EP2728333A4/en not_active Withdrawn
- 2012-06-14 CN CN201280004455.XA patent/CN103282761B/zh active Active
- 2012-06-14 JP JP2013503682A patent/JP5337325B2/ja active Active
- 2012-06-26 TW TW101122768A patent/TWI487860B/zh active
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JPS60183845U (ja) * | 1984-05-16 | 1985-12-06 | 横河電機株式会社 | サンプルポ−ト |
JPH07128204A (ja) | 1993-10-30 | 1995-05-19 | Nec Kyushu Ltd | サンプリング装置 |
JPH11169456A (ja) | 1997-12-11 | 1999-06-29 | Akihisa Minato | サンプルポート |
JP2002014015A (ja) * | 2000-06-29 | 2002-01-18 | Daicen Membrane Systems Ltd | サンプリング配管装置 |
JP2003093501A (ja) * | 2001-09-27 | 2003-04-02 | Toray Medical Co Ltd | 透析液サンプリングポート |
JP4352368B2 (ja) | 2001-09-27 | 2009-10-28 | 東レ・メディカル株式会社 | 透析液サンプリングポート |
JP2009207706A (ja) | 2008-03-05 | 2009-09-17 | Keihin Hi-Flo Sales Co Ltd | 医療用サンプリングバルブ |
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JP2014210067A (ja) * | 2013-04-19 | 2014-11-13 | 東レ・メディカル株式会社 | 分岐ポート |
Also Published As
Publication number | Publication date |
---|---|
EP2728333A4 (en) | 2015-05-27 |
TW201305469A (zh) | 2013-02-01 |
JP5337325B2 (ja) | 2013-11-06 |
TWI487860B (zh) | 2015-06-11 |
CN103282761B (zh) | 2016-08-24 |
CN103282761A (zh) | 2013-09-04 |
EP2728333A1 (en) | 2014-05-07 |
JPWO2013002032A1 (ja) | 2015-02-23 |
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