JP6691045B2 - Sampling valve - Google Patents

Description

  The present invention relates to a sampling valve for extracting a sample liquid from a pipe through which a liquid flows.

  In the fields of pharmaceuticals, beverages, or the electronics industry, it is desirable that the presence of microorganisms in pure water, ultrapure water, or the like used is as close to zero as possible. Therefore, in order to control the presence of microorganisms in the liquid, the liquid used is sampled on a daily basis. In this specification, sampling means extracting liquid from a pipe through which the liquid flows, which is also referred to as “water sampling”. The liquid to be extracted is also referred to as "sampling liquid".

  For example, in the "Guideline for the production of aseptic pharmaceuticals by the aseptic method," which was contacted by the Ministry of Health, Labor and Welfare, regarding the daily management of pharmaceutical water, "The deterioration of the microbiological quality of the produced water was grasped in advance and the pharmaceutical water production system was used. By maintaining the functional homeostasis of the pharmaceutical water, it is possible to maintain the quality of the manufactured pharmaceutical water and prevent it from adversely affecting the quality of the product. It is required to carry out specific management, record the records, and keep the records (see Non-Patent Document 1 below).

  A sampling valve is used to perform the above water sampling. One of the issues to be noted when using the sampling valve is that if liquid remains inside the sampling valve after water collection, the microorganisms in the remaining liquid will propagate inside the valve and the next sampling This means that the microorganisms that have propagated inside the valve will be collected during water. If this happens, accurate monitoring will not be possible.

  As a solution to this problem, for example, a product of Keofitt Co. has a sterilization sampling valve configured to clean the inside of the valve with steam or the like during normal use with the valve closed. This sampling valve is configured so that the upper and lower hose pieces provided in the valve body can communicate with each other even when the valve is closed, and can be sterilized by flowing steam or the like to the upper and lower hose pieces (the following non-patent document). 2). As another sterilization method, there is a method of sterilizing the valve and the branch pipe (the pipe connecting the valve and the main pipe through which the treated water flows) by heating the valve with a heating means such as a cassette gas torch burner. It was However, in the sterilization method using steam or heating means, it is necessary to perform sterilization operation immediately before collecting water, and some tools such as a steam generator and a cassette gas torch burner are required. Therefore, it took time to sterilize and prepare tools.

  Further, Patent Document 1 below discloses a medical sampling valve provided with a flow path so as not to cause stagnation in the sampling valve, as a measure for preventing the liquid inside the sampling valve from remaining. However, the medical sampling valve of Patent Document 1 has a structure in which pipes such as pipes and hoses are connected to the joint portion. This structure can be used only when the amount of treated water is small, and cannot be applied when the amount of water of 1 cubic meter or more flows per hour. That is, in the structure of Patent Document 1, the use of the sampling valve is limited because the structure has a limit in the amount of treated water flowing through the pipe.

  In addition, the conventional sampling valve does not have a structure for recording that water has been collected. Therefore, the recording of water sampling is performed by an operator manually inputting the data into a recording device such as a personal computer. In other words, in the conventional sampling valve, water sampling and recording were independent. Therefore, a human error may occur, for example, forgetting to record the water sampling.

JP, 2009-207706, A

"" 2010 Health and Labor Sciences Research (Regulatory Science Comprehensive Research Project for Pharmaceuticals and Medical Devices) / Research on the introduction of new test methods to ensure the microbiological quality of pharmaceuticals / Guideline for the production of aseptic pharmaceuticals by the aseptic method , [Online], Principal Investigator: Masashi Muroi, "Guideline for Manufacturing Aseptic Drugs by Aseptic Manipulation Method" Preparation Group, April 20, 2011, [June 9, 2014 Search], Internet < URL: http://www.pref.tokushima.jp/docs/2012022200182/files/mukin.pdf〉 "Sterilization Sampling Valve [Keofitt]", [online], published in 2011, Yasu Trading Co., Ltd. [Search June 9, 2014], Internet <URL: http: //www.ybk.co. jp / flowControl / 1083-04_keofitt.html #〉

  The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a sampling valve that can be easily and routinely and routinely managed.

The present invention has a mechanism for opening and closing a pipeline branched from a pipe through which a liquid flows, and the liquid for sampling is opened from the pipeline through the pipeline to an end portion of the pipeline. In a sampling valve configured to be pulled out from an outlet provided in a container, a container detachably attached to the end portion of the conduit, and a container housed in the container, the outlet of the conduit. And a light source for irradiating the inside of the conduit with ultraviolet rays, the conduit including a water passage portion made of an ultraviolet-transparent material inside, the water passage portion having a water passage, and the water passage. There communicating with the outlet port, a sampling valve, wherein the diameter of the vent water passage is smaller than the size of the outlet of the conduit.

Sampling valve having the above structure is a light source for irradiating ultraviolet rays to the conduit housed in a container, Runode container is detachably attached to the ends of the conduit, pipe for water sampling road outside the UV light from a light source housed in the container can be sterilized or sterilized microorganisms present in the liquid remaining in the tube path, and, is Ru facilitates der maintenance of the light source.

Also includes a water passing portion the conduit is made of a UV transparent material inside, vent water unit has a water passage communicated vent waterways to said outlet, the diameter of the vent water path the Since it is smaller than the size of the outlet provided at the end of the pipe, the end of the water passage is widely exposed to the light source, and the ultraviolet rays from the light source are widely transmitted through the ultraviolet permeable material, and the entire pipeline is As a result, the pipeline can be irradiated with ultraviolet rays over a wide range as much as possible, thereby enhancing the sterilizing or sterilizing effect of microorganisms and the like existing in the liquid remaining in the pipeline.

  The light source for irradiating ultraviolet rays is a low-pressure mercury lamp, a high-pressure mercury lamp, a medium-pressure mercury lamp, an LED, an excimer lamp, an LD (laser diode), an electrodeless lamp or the like that emits a wavelength of 170 to 400 nm.

In sampling valve according to one embodiment, when removing the light source from the sampling valve can be configured to automatically turn off the light source. Further, the sampling bulb can be configured to automatically turn on the light source when the light source is attached to the sampling bulb.

  The sampling valve according to one embodiment may be configured to include an information output unit that outputs water sampling operation detection information in response to a water sampling operation for extracting the sampling liquid. The water sampling operation detection information output by the information output unit can be recorded as a water sampling history in a recording device provided in the sampling valve or an external recording device such as a personal computer. In the latter case, the sampling valve includes a transmitting unit that transmits the water sampling operation detection information to an external recording device by wire or wirelessly. The water sampling history includes, for example, a water sampling location, a water sampling date and time, an ultraviolet irradiation history, and the like. Thus, it is possible to automatically record and manage data such as history regarding water sampling when a water sampling operation is performed.

  According to the present invention, since the sampling valve is provided with the light source, the inside of the conduit can be sterilized or sterilized by using the light source. Therefore, microbial contamination of the sampling valve can be easily prevented without trouble. Further, by the configuration further including the information output means, when the water is sampled, the water sampling history information such as the water sampling location, the date and time of the water sampling, and the ultraviolet irradiation history is automatically stored in the recording device such as a personal computer. As a result, human error such as forgetting to record can be prevented easily without any trouble. That is, according to the present invention, there is an excellent effect that it is possible to provide a sampling valve capable of performing daily and periodical management easily and without trouble.

The side sectional view of one example of the sampling valve concerning this invention. The perspective view which shows the water flow part of FIG. The perspective view which shows the light source cap of FIG. FIG. 3 is a side cross-sectional view illustrating the sampling valve of FIG. 1 when collecting water. The block diagram explaining the structure of light source on / off switching control. The block diagram explaining the structure which records a water sampling history automatically. The side sectional view at the time of normal of the sampling valve concerning another embodiment. FIG. 8 is a side sectional view of the sampling valve of FIG. 7 during water sampling.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side sectional view showing a sampling valve according to an embodiment of the present invention, and illustrates a normal state in which the sampling valve 10 is closed. Reference numeral 1 is a treated water pipe through which a liquid (hereinafter, “treated water”) flows. The treated water is any liquid, for example, pure water or ultrapure water. The sampling valve 10 is configured to extract (collect water) the treated water through a pipe branching from the treated water pipe 1, and to sterilize or sterilize the treated water remaining in the pipe, ultraviolet rays are emitted. A light source 20 for irradiating is provided. In this specification, in each component of the sampling valve 10, the side connected to the treated water pipe 1 (upper side in FIG. 1) is “upper”, and the side opposite to the treated water pipe 1 (lower side in FIG. 1) is It is called "below".

  The sampling valve 10 has a sampling housing 30 fixed to the treated water pipe 1 by, for example, welding. As a modified example of the means for fixing the sampling housing 30 to the pipe 1, a well-known fitting means such as a flange, a sanitary joint, or a screwed socket is provided on the treated water pipe 1 and the sampling valve 10, and the treatment is performed by the fitting means. The water pipe 1 and the sampling valve 10 may be fitted together. The sampling housing 30 is a member formed in a hollow cylindrical shape, and is attached to the treated water pipe 1 in a substantially vertical direction. On the upper surface of the sampling housing 30, a water inlet 31 that connects the treated water pipe 1 and the space inside the sampling housing 30 is provided.

  A male screw portion 32 is formed on the outer peripheral surface of the sampling housing 30. A female screw portion 52 corresponding to the male screw portion 32 is formed on the inner circumference of the sampling socket 50. Then, the sampling socket 50 is attached to the outer periphery of the sampling housing 30 via the male screw portion 32 and the female screw portion 52. Therefore, when an operator or the like rotates the sampling socket 50, the sampling socket 50 moves in the axial direction (vertical direction in the drawing) relative to the sampling housing 30 according to the rotation.

  The sampling socket adapter 60 is fixed to the lower end of the sampling socket 50 by suitable fixing means such as screwing at a plurality of places (for example, four places) not shown. The sampling socket adapter 60 is a disk-shaped member having substantially the same diameter as the sampling socket 50, and has a circular water sampling port 61 formed in the center.

  In the sampling housing 30, a water passage 40 having a water passage 41 for extracting the treated water from the pipe is arranged. As shown in FIG. 2, the water passage portion 40 is composed of a cylindrical member that fits into the space inside the sampling housing 30 as a whole, and the water passage 41 is dug into the cylindrical member. The water passage 41 is formed in, for example, an L-shape that connects one inflow hole 42 provided on the side surface to one outflow hole 43 provided on the lower surface. The outflow hole 43 of the water passage 41 is formed at a position facing the water sampling port 61 so that the treated water discharged therefrom can be taken out from the water sampling port 61 of the sampling socket adapter 60. As a modified example of the water passage 41, for example, a plurality of inflow holes such as a T-shaped structure in which two inflow holes are provided at opposing positions on the side surface of the water passage 40 and one outflow hole provided on the lower surface is connected. And / or a structure with multiple outflow holes may be applied.

  A collar portion 46 is formed at the lower end of the water passage portion 40. The water passage portion 40 is integrally locked to the sampling socket 50 and the sampling socket adapter 60 via the collar portion 46, and as the sampling socket 50 (and the sampling socket adapter 60) moves in the vertical direction, the inside of the sampling housing 30. Move up and down. A first recess 45 is formed on the upper surface of the water passage 40 at a position facing the water inlet 31, and a first water stop O-ring 44 (see FIG. 1) is attached to the first recess 45. . The first water stop O-ring 44 is an annular member formed to have a diameter larger than that of the water inlet 31, and is made of an elastic body such as rubber. In the normal state shown in FIG. 1, the first water stop O-ring 44 on the upper surface of the water passage portion 40 comes into contact with the upper surface of the sampling housing 30 and is crushed, and the water inlet 31 is stopped. The treated water does not flow into the gap between the water passage portion 40 and the water passage portion 40.

  In addition, the inner peripheral surface of the sampling housing 30 is formed with a second recess 33 into which the second water stop O-ring 34 is mounted, and the second water stop O-ring 34 is used to collect water (described later) (see FIG. 4). The water between the water passage portion 40 and the inner peripheral surface of the sampling valve 10 is stopped. The installation position of the second water stop O-ring 34 is a position above the inflow hole 42 of the water passage portion 40 during water sampling (see FIG. 4). The second water stop O-ring 34 is an annular member that is formed so as to fit the outer periphery of the water passage portion 40, and is made of an elastic material such as rubber, and has a central axis between the water passage portion 40 and the sampling valve 10. It also has a matching role. Since the water passage portion 40 has a structure that moves parallel to the central axis thereof, it is possible to provide a plurality of second water shut off O-rings 34.

  The water passage portion 40 is generally made of an ultraviolet ray transmissive material that transmits ultraviolet rays emitted from a light source 20 described later, for example, quartz glass that transmits ultraviolet rays. The water passage portion 40 has a gap between a side surface of the sampling housing 30 and the water passage portion 40. The space of the water passage 41 can be irradiated with ultraviolet rays from the light source 20. As another example, the water passage portion 40 is made of an ultraviolet light transmissive resin such as a fluororesin such as FEP or PFA.

  Below the sampling socket adapter 60, the light source cap 21 is detachably attached by, for example, a patch lock (not shown). As shown in FIG. 3, the light source cap 21 is a hollow cylindrical member having substantially the same diameter as the sampling socket 50 (and the sampling socket adapter 60), and the light source 20 is arranged at the approximate center of the bottom surface. In this case, the light source 20 is arranged at a position facing the outflow hole 43 of the water passage 41, and irradiates ultraviolet rays from the lower side of the water passage 40. The diameter of the water sampling port 61 of the sampling socket adapter 60 is made large so that the ultraviolet rays from the light source 20 can sufficiently reach the space between the sampling housing 30, the water passage portion 40 and the side surface, and the space of the water passage 41. For example, the diameter of the water sampling port 61 is set to be substantially the same as the diameter of the portion of the water passage portion 40 other than the flange portion 46. As a result, the lower surface of the water passage portion 40 is widely exposed to the light source 20, so that ultraviolet rays are widely transmitted.

  As the light source 20, a light source that emits a wavelength of 170 to 400 nm is used. The light source 20 is, for example, an LED that emits ultraviolet rays (referred to as “UV-LED”). As the UV-LED, for example, one that emits a peak wavelength of 265 nm or 285 nm of an SMD package prototype manufactured by Nikkiso Giken, one-chip type or four-chip type that emits a peak wavelength of 275 nm manufactured by Nitride Semiconductor, and PKG: 03WG manufactured by Effect. For example, those emitting a peak wavelength of 265 nm or 280 nm can be applied.

  As the light source 20, besides the UV-LED, for example, a low pressure mercury lamp, a high pressure mercury lamp, a medium pressure mercury lamp, an excimer lamp, an LD (laser diode), an electrodeless lamp or the like can be used.

  As the power source of the light source 20, a battery such as a dry battery or a storage battery may be used, or an AC commercial power source such as 100V, 200V, 220V may be used. When a battery is used as the power source of the light source 20, the light source cap 21 may be provided with a battery box. According to this configuration, the light source 20 and the power source (battery) can be replaced at the same time by performing only one operation of replacing the light source cap 21 with a new one. Alternatively, a hydroelectric generator that generates electric power from the water flow of the treated water flowing through the pipe 1 may be provided, and the hydroelectric generator may be used as the power source of the light source.

  The light source 20 may be turned on continuously or may be turned on discontinuously (that is, intermittently). Further, the light source 20 may be dimmed and turned on to adjust the intensity of ultraviolet rays to be emitted. The sampling valve 10 includes a computer that executes a program that controls the time for turning on the light source 20, and the computer can be configured to control the time for turning on the light source 20. As a modification, the computer that executes the program for controlling the time for turning on the light source 20 is an external computer, and the time for turning on the light source 20 may be remotely controlled from the external computer.

  FIG. 5 is a block diagram illustrating an example of a configuration for controlling turning on / off of the light source 20. In one embodiment, the sampling bulb 10 has an electrical switch 74 mounted on a mounting portion (for example, a patch lock or the like) of the light source cap 21 with respect to the sampling socket adapter 60, and the function of the switch 74 allows the sampling socket adapter 60 to emit light from the light source. The light source 20 may be turned off when the cap 21 is separated, while the light source 20 may be turned on when the light source cap 21 is attached to the sampling socket adapter 60. Further, as another configuration example of the lighting / extinguishing control of the light source 20, the sampling valve 10 is equipped with a receiving unit for the lighting / extinguishing control signal of the light source 20, and by transmitting the lighting / extinguishing control signal from an external remote controller, The light source 20 may be configured to be remotely controlled to be turned on and off. Further, the sampling valve 10 may be provided with a switch for manually switching on and off of the light source 20.

  Next, the procedure of water sampling using the sampling valve 10 having the above configuration will be described. First, as shown in FIG. 4, the light source cap 21 is removed from the main body of the sampling valve 10 from the normal state shown in FIG. In FIG. 4, the movement of the light source cap 21 detached from the sampling valve 10 is represented by a chain line arrow. When the worker turns the sampling socket 50 (and the sampling socket adapter 60) after removing the light source cap 21, the water passage portion 40 moves downward relative to the sampling housing 30 as shown in FIG. As a result, a gap is formed between the upper surface of the water passage portion 40 and the upper end of the sampling housing, and the crushing of the first water stop O-ring 44 is loosened. Then, the treated water flows into the housing 30 through the water inlet 31 due to the water pressure in the treated water pipe 1. Since water is stopped by the second water stop O-ring 34 between the water passage 40 and the inner peripheral surface of the sampling valve 10, the treated water that has flowed into the housing 30 flows into the water passage 41 from the inflow hole 42. . Then, the treated water flowing out from the outflow hole 43 through the water passage 41 can be collected from the water collecting port 61. Since the structure is such that the water passage portion 40 is moved downward during water sampling, it is possible to prevent residual water remaining during the previous water sampling from entering the pipe 1 during water sampling. Further, in order to prevent the residual water from entering the pipe 1, it is desirable to wait for the previous residual water to flow out from the water sampling port 61 at the time of water sampling.

  After collecting water, the worker turns the sampling socket 50 (and the sampling socket adapter 60) in the opposite direction to move the water passage portion 40 downward, and the first water stop O-ring on the upper surface of the water passage portion 40. Abut 44 on the upper end of the sampling housing. This closes the water inlet 31. Then, only by attaching the light source cap 21 to the sampling socket adapter 60 and irradiating the ultraviolet ray of the light source 20 toward the water passage portion 40, the space between the sampling housing 30 and the water passage portion 40 and the space of the water passage 41 are formed. It is possible to irradiate the remaining treated water and the wall surface with which the treated water is in contact with ultraviolet rays. Thereby, the microorganisms remaining in the space between the sampling housing 30 and the water passage portion 40 and the space of the water passage 41 can be sterilized or sterilized. In the embodiment, the light source 20 is normally attached while the light source 20 is removed during water sampling, so that the light source 20 impairs the functionality of the sampling valve 10 during water sampling (for example, hinders water sampling work). The effect of sterilization or sterilization of microorganisms by ultraviolet irradiation from the light source 20 can be obtained at all times.

  Summarizing the configuration of the sampling valve 10 according to the embodiment described above, the sampling housing 30 and the water passage portion 40 form a pipeline branching from the pipe through which the liquid to be treated flows, and the sampling socket 50 and the sampling socket adapter 60 are provided. Is a mechanism that opens and closes the pipeline (that is, moves the water passage portion 40), and these functions as a main body of the sampling valve 10, that is, a water intake portion that extracts the treated water for sampling from the pipe 1. Then, the light source 20 is disposed in the light source cap 21 detachably attached to the outside of the conduits (30, 40), and the ultraviolet rays from the light source 20 are irradiated into the conduits (30, 40). .

  FIG. 6 is an electrical block diagram illustrating an example of a configuration for automatically recording and managing the history of water sampling operation using the sampling valve 10. As shown in FIG. 6, the sampling valve 10 includes an information output unit 70 that outputs water sampling operation detection information in response to a water sampling operation for extracting treated water from the pipe 1. The information output means 70 is equipped with an electric switch, for example, in a mounting portion of the light source cap 21 (for example, a patch lock), and when the light source cap 21 is separated, the water output operation detection information is obtained by the operation of the electric switch. Can be configured to output. The water sampling operation detection information output by the information output unit 70 is transmitted to the recording device 72, and is recorded (stored) and managed as a water sampling history in the recording device 72. The recording device 72 may be mounted on the sampling valve 10 or may be provided outside the sampling valve 10, such as a personal computer. In the latter case, the sampling valve 10 includes a transmission unit that transmits the water sampling operation detection information to the external recording device 72 by wired or wireless means. The water sampling history recorded in the recording device 72 is, for example, the date and time when the water sampling was performed, the place, and the ultraviolet irradiation history and other related data. For example, the water sampling operation detection information is simply a signal notifying the detection of the water sampling operation, and the recording device 72 generates and records the data to be recorded as the water sampling history according to the signal. As another example, the water sampling operation detection information may include data that can be used as a water sampling history (date and time, place, ultraviolet irradiation amount or time, etc.). By automatically recording and managing data such as history regarding water sampling when a water sampling operation is performed, it is possible to prevent human error such as forgetting to record.

  Regarding the sterilization or sterilization of microorganisms by the ultraviolet rays emitted from the light source 20, the operation method of ultraviolet rays is to irradiate until a predetermined ultraviolet ray irradiation amount and continuously emit so that a predetermined ultraviolet ray illuminance is applied. There are two things to do. The former can obtain a predetermined UV irradiation amount in a relatively short time by irradiating with a constant intensity so as to obtain a strong UV illuminance. The latter needs only to emit a weak UV illuminance to the extent that biofilms that may be formed on the wall surface are not generated. If the prescribed value of the UV irradiation dose of the former is 30 mJ / cm2, and if the UV illuminance at the position to be irradiated with UV light is at least 0.005 mW / cm2, the predetermined UV irradiation dose can be obtained in 100 minutes of irradiation time. it can. If the latter ultraviolet illuminance is 0.001 mW / cm 2, the current value of the light source 20 may be adjusted so that the ultraviolet illuminance at the position where the ultraviolet ray is desired to be irradiated is at least this illuminance.

  Either one of these ultraviolet irradiation methods may be adopted, or both may be used in combination. Further, the method is not limited to this, and a method of continuously radiating with strong ultraviolet illuminance may be used. The above-mentioned two prescribed values differ depending on the light source used, the wavelength, and the target microorganism. As an example, when the Pseudomonas aeruginosa is used as a target using the light source 20 having a wavelength of 265 nm, it is appropriate that the ultraviolet irradiation amount is 10 mJ / cm 2 or more, and the higher the ultraviolet irradiation amount is, the higher the sterilization rate is. . In that case, it is appropriate that the ultraviolet illuminance is at least 0.0001 mW / cm 2 or more, and the higher the ultraviolet illuminance, the higher the biofilm suppression effect. As the wavelengths change from 265 nm to 285 nm and 300 nm, exponentially high values are required as these prescribed values. For example, when 265 nm and 300 nm are compared, 300 nm requires a prescribed value 10 times as large.

  When the UV-LED is applied as the light source 20 as in the above-described embodiment, the power consumption is small. When the UV-LED is used, a battery such as a dry battery or a storage battery is used as the power source of the light source 20 because of its low power consumption and the condition that the continuous lighting is not always necessary (it may be discontinuously lit). Easy to use. When the light source 20 is turned on discontinuously, an electric switch is mounted on the attachment / detachment portion of the light source cap 21 as described above, and the light source 20 is automatically turned on / off according to attachment / detachment. Good to do.

  Further, the light source cap 21 is provided with a display unit using a display to display various information such as whether the light source 20 is on or off, whether the lamp is burned out, or the total lighting time of the light source 20. can do. As another example, the display unit can simply indicate whether the light source is on or off, or whether the lamp is off by using an indicator light such as an LED or a neon tube.

  Since the sampling valve 10 shown in FIGS. 1 to 4 has water pressure in the treated water pipe 1, water can be collected only by loosening the connection between the sampling housing 30 and the sampling socket 50 and moving the water passage portion 40 downward. It has a structure that allows it. In this structure, the sampling housing 30 needs to be attached to the outlet side of the pump that feeds the treated water to the treated water pipe 1. In addition, in the residual water irradiated by the light source 20, there are microorganisms that are inactive and lose their growth ability. Microorganisms that have been irradiated with ultraviolet rays are inactive, but they are not necessarily decomposed, so the effect of reducing substances such as endotoxin existing in bacteria cannot be expected. In consideration of this point, the sampling valve 10 shown in FIGS. 1 to 4 has a structure in which the water passage portion 40 is moved downward during water sampling as described above. It is preventing you from entering within 1. Further, it is desirable to wait for the residual water to flow out from the water sampling port 61 during water sampling. If such consideration is not necessary, the sampling valve 10 may have a modified structure shown in FIGS. 7 and 8. Note that, also in the modified examples shown in FIGS. 7 and 8, common components are assigned the same reference numerals as those in FIGS. 1 to 4, and description thereof will be omitted.

  The sampling valve 10 of FIGS. 7 and 8 differs from the structure of FIGS. 1 to 4 in that the water passage portion 40 is inserted into the treated water pipe 1 during the water sampling shown in FIG. 8. That is, as shown in FIGS. 7 and 8, the upper end of the sampling housing 30 has an opening 35. On the inner circumference of the sampling housing 30, a third recess 37 in which the third water stop O-ring 36 is arranged at a position above the inflow hole 42 of the water passage 41 of the water passage 40 at the normal time shown in FIG. 7. Is formed. In the normal state shown in FIG. 7, the third water stop O-ring 36 prevents the treated water from flowing into the gap between the sampling housing 30 and the water passage 40. At the time of water sampling shown in FIG. 8, the light source cap 21 was first removed from the main body of the sampling valve 10, and then the sampling socket 50 was rotated to move the water passage portion 40 upward, thereby providing the side surface of the water passage portion 40. The inflow hole 42 of the water passage 41 is projected into the pipe 1. As a result, the treated water in the pipe 1 flows into the water passage 41 from the inflow hole 42, and the treated water that has flowed in can be collected. After collecting water, the worker turns the sampling socket 50 in the opposite direction to return the water passage 40 to the normal position shown in FIG. 7, and attaches the light source cap 21 to the sampling valve 10 main body. In this structure, the outer surface of the water passage portion 40 that jumps out into the pipe 1 during water sampling gets wet with the treated water. The wet surface enters the pipe 1 every time water is sampled thereafter and comes into contact with the treated water. Then, when microorganisms are attached to the wet surface, even if the microorganisms are inactivated by the irradiation of the ultraviolet light of the light source 20, the inactivated microorganisms attached to the wet surface are treated water at the time of collecting water after the next time. There is a risk that it will peel off as it touches and flow in the pipe 1. Therefore, in the configurations of FIGS. 7 and 8, inactivated microorganisms may be mixed in the treated water. When such contamination of microorganisms does not pose a problem, the sampling valve 10 having the structure shown in FIGS. 7 and 8 can be used.

  The arrangement position of the light source 20 need not be below the sampling valve 10 (water passage portion 40) as shown in FIGS. 1, 4, 7, and 8. As a modification, for example, the light source 20 may be arranged on the side surface of the water passage portion 40, and the sampling valve 10 may be configured to radiate ultraviolet rays from the side surface. In that case, at least a part of the components such as the housing 30 and the water passage portion 40 that configure the conduit are made of an ultraviolet-transparent material so that the ultraviolet rays from the light source 20 arranged on the side surface can be transmitted. Furthermore, the light source 20 may be installed inside the conduit, for example, incorporated in the water passage 41.

  The sampling valve 10 is not limited to the configuration shown in FIGS. 1 to 8 but may have another configuration without departing from the spirit of the present invention.

Claims (9)

A mechanism for opening and closing a pipeline branched from a pipe through which the liquid flows, the liquid for sampling in a state where the pipeline is opened, is provided from the pipe through the pipeline to the end of the pipeline. In a sampling valve configured to withdraw from the outlet,
A container detachably attached to the end of the conduit,
A light source that is housed in the container and faces the outlet of the pipeline to irradiate the interior of the pipeline with ultraviolet rays; and the pipeline includes a water passage portion made of an ultraviolet-transparent material inside. has vent water portion of the water passage communicates vent waterways to said outlet, sampling valve, wherein the diameter of the vent water passage is smaller than the size of the outlet of the conduit. The pipe is provided with a housing for mounting the sampling valve,
The conduit includes, on the outside, a socket screwed into the housing, the water passage is disposed inside the socket and the housing, and the water passage rotates around the housing. Is engaged with the socket so as to be linearly displaced with respect to the housing in accordance with the linear displacement of the pipe, and the pipeline is opened and closed according to the linear position of the water passage portion with respect to the housing. The sampling valve according to claim 1, wherein: The liquid for sampling is withdrawn from the outlet of the conduit by opening the conduit with the container removed from the end of the conduit. The sampling valve according to 1 or 2. The light source comprises a low-pressure mercury lamp, a high-pressure mercury lamp, a medium-pressure mercury lamp, an LED, an excimer lamp, a laser diode, or an electrodeless lamp, which emits light having a wavelength of 170 to 400 nm . Sampling valve according to any one . The sampling valve according to any one of claims 1 to 4, further comprising an extinguishing control unit that automatically extinguishes the light source when the container is removed from the sampling valve. The sampling valve according to any one of claims 1 to 5, further comprising lighting control means for automatically lighting the light source when the container is attached to the sampling valve.   The sampling valve according to any one of claims 1 to 6, further comprising: an information output unit that outputs water sampling operation detection information in response to a water sampling operation for extracting the sampling liquid.   The sampling valve according to claim 7, further comprising a recording unit that records the water sampling operation detection information output from the information output unit as a date and time related to water sampling, a location, and related water sampling history data. .   The sampling valve according to claim 7, further comprising a transmitting unit that transmits the water sampling operation detection information output by the information output unit to an external recording device by wire or wirelessly.

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