JP4869206B2 - UV water treatment equipment - Google Patents

Description

  The present invention relates to an ultraviolet water treatment apparatus, and more specifically, a lamp protective tube containing an ultraviolet lamp that irradiates water to be treated with ultraviolet rays, and an ultraviolet illuminance meter that measures the illuminance of ultraviolet rays emitted from the ultraviolet lamp. The present invention relates to an ultraviolet water treatment apparatus provided with a cleaning device that removes dirt on the outer surface of an illuminometer protective tube in which is stored.

  The ultraviolet water treatment apparatus allows water to be treated such as tap water, various industrial water, and pure water to flow through the treatment tank, and irradiates the water to be treated with an ultraviolet lamp disposed in the treatment tank. It disinfects, sterilizes and decomposes organic matter.

  Specifically, as described in, for example, Patent Document 1, water to be treated is allowed to flow through a cylindrical treatment tank, and a plurality of ultraviolet lamps are accommodated concentrically with respect to the cylindrical axis of the treatment tank. It is known to arrange a lamp protection tube to maximize the average illuminance in the treatment tank.

  In addition, it is known that an illuminometer protective tube that accommodates an ultraviolet illuminance meter is disposed on the cylindrical axis of the processing tank, and the ultraviolet irradiation amount is measured at a position that is equidistant from a plurality of ultraviolet lamps.

By the way, in the ultraviolet water treatment apparatus, dissolved substances contained in the liquid to be treated passing through the treatment tank adhere to the outer surfaces of the lamp protection tube and the illuminance meter protection tube, and the ultraviolet rays irradiated to the liquid to be treated by this deposit. As a result, the processing effect is reduced due to a decrease in the amount of light, and an error occurs in the measurement illuminance.
In order to deal with such a problem, Patent Document 1 describes that a wiper mechanism for removing dirt on the outer surface of the lamp protection tube and the illuminance meter protection tube is provided. Specifically, the wiper mechanism forms a wiper member such as an elastic rubber resin or a synthetic resin in an annular shape that contacts the outer surface of the lamp protection tube and the illuminometer protection tube, and this is formed on each protection tube. It moves along, and removes dirt.

JP 2007-155546 A

  However, in the technique of the above-mentioned Patent Document 1, it may be considered that the operation when moving the wiper member along each protective tube becomes unstable.

  That is, according to the description of Patent Document 1, for example, a wiper member is provided in each protective tube through-hole of a cleaning frame having a protective tube through-hole through which each protective tube is inserted, and the cleaning frame is disposed along the protective tube. A configuration for moving the image is conceivable.

  In this case, since the illuminometer protective tube exists at a position on the cylindrical axis, in other words, at the center position of the cleaning frame, the driving force when moving the cleaning frame must be applied to a position eccentric from the center position of the frame. Absent. When a propulsive force is applied to a position away from the center position of the frame, an unbalanced force is applied to the cleaning frame, and the cleaning frame may be shrunk, and the operation may not be stable.

  Accordingly, an object of the present invention is to stably operate a cleaning device for a lamp protection tube and a luminometer protection tube.

  In order to solve the above problems, an ultraviolet water treatment apparatus of the present invention is arranged concentrically with a cylindrical container through which water to be treated is circulated, and a cylindrical axis of the container, and an ultraviolet lamp is accommodated therein. A plurality of glass lamp protective tubes, a glass illuminometer protective tube arranged on the cylindrical axis of the container and containing an ultraviolet illuminance meter, and an outer surface of the lamp protective tube and the illuminometer protective tube The basic configuration is to include a cleaning device for removing dirt.

  The cleaning device includes a cleaning unit and a driving unit that moves the cleaning unit in the cylindrical axis direction. The driving unit is supported in a freely rotating manner at a position that is parallel to the illuminometer protective tube and does not interfere with the illuminometer protection tube. And a drive mechanism for rotating the feed screw. The cleaning unit includes a plurality of cleaning frames each having a plurality of protection tube through holes through which the plurality of lamp protection tubes and illuminance meter protection tubes are inserted, and a feed screw through hole through which the feed screw is inserted, and A connecting member for connecting a plurality of cleaning frames at intervals in the cylindrical axis direction, and flexibility provided in a plurality of protective tube through-holes so as to be able to contact the outer surfaces of the plurality of lamp protective tubes and the illuminometer protective tubes. And a feed nut fixed to one of the feed screw through holes of the plurality of cleaning frames.

  In other words, in the present invention, a plurality of cleaning frames are arranged at intervals in the cylindrical axis direction, and these are connected by the connecting member and moved together along the protective tube. As a result, even if the position where the driving force of the cleaning frame is applied is deviated from the center position of the frame, it prevents the imbalanced force from being applied to the cleaning frame and suppresses the movement of the cleaning frame. can do. As a result, the cleaning device for the lamp protection tube and the illuminometer protection tube can be stably operated.

  In this case, a plurality of lamp protection tubes, a luminometer protection tube, and a guide rod supported in a position not interfering with the feed screw and a guide rod formed on the plurality of cleaning frames are inserted. The guide rod through hole has a guide rod before the plurality of lamp protection tubes and the illuminometer protection tube and the protection tube through hole come into contact with each other due to the rotation of each cleaning frame as the feed screw rotates. It is preferable that the rod and the guide rod through hole come into contact with each other, and the cleaning unit is formed to move in the cylindrical axis direction while sliding on the guide rod.

  That is, the thrust of the cleaning unit is given by rotating the feed screw and making the feed nut fixed to the cleaning frame and the cleaning frame non-rotating, but when the feed screw is rotated, the rotational force is It is transmitted to the cleaning frame via the feed nut and finally transmitted to the guide bar and each protection tube. Here, for example, if an external force is applied to each protective tube made of quartz glass, there is a possibility of breakage or the like, which is not preferable. Therefore, the diameter of the guide rod through-hole is set before each protective tube and the protective tube through-hole contact each other. The guide rod and the guide rod through hole are formed in contact with each other. In other words, the rotation of the cleaning frame is received by the guide rod, and the cleaning unit (each cleaning frame) moves in the cylindrical axis direction while sliding on the guide rod. Thereby, for example, even when the feed nut meshes with the feed screw, it is possible to prevent the protection tube from being damaged due to a rotational force applied to each protection tube from the cleaning frame.

  Further, a door wheel may be provided in the guide rod through hole of each cleaning frame so that the cleaning unit rolls and slides on the guide rod. Each cleaning frame of the cleaning unit slides on the guide bar. However, when the liquid to be treated contains fine foreign matters, the frictional resistance is remarkably increased and the sliding noise is increased. Therefore, by providing a door wheel in the guide rod through hole, it is possible to reduce the frictional resistance and lower the sliding noise.

  ADVANTAGE OF THE INVENTION According to this invention, the washing | cleaning apparatus of a lamp protection tube and a luminometer protection tube can be operated stably.

  Hereinafter, an embodiment of an ultraviolet water treatment apparatus to which the present invention is applied will be described with reference to FIGS. In the present embodiment, an ultraviolet water treatment apparatus that performs disinfection, sterilization, killing, decomposition of organic substances, oxidation treatment, and the like will be described as an example.

  FIG. 1A is a top sectional view showing a schematic configuration of an ultraviolet water treatment apparatus to which the present invention is applied, and FIG. 1B is a side view showing a schematic configuration of the ultraviolet water treatment apparatus. As shown in FIG. 1, the ultraviolet water treatment apparatus 1 of this embodiment includes a cylindrical treatment tank 3 through which water to be treated, which is a fluid to be irradiated with ultraviolet rays, flows. The treatment tank 3 is made of an anticorrosive material, for example, a metal such as stainless steel or aluminum, and a plurality of straight tubular ultraviolet lamps 5 are installed inside the treatment tank 3 along the extending direction of the treatment tank 3. Has been. The ultraviolet lamp 5 is installed in a state of being inserted into a cylindrical lamp protection tube 7.

  Further, a straight tubular ultraviolet illuminance meter 9 is installed inside the processing tank 3 along the extending direction of the processing tank 3. The ultraviolet illuminance meter 9 is installed in a state of being inserted into a cylindrical illuminance meter protective tube 11. The lamp protection tube 7 and the illuminance meter protection tube 11 are made of an ultraviolet light transmissive material such as quartz glass or Teflon (registered trademark) resin. Further, an ultraviolet resistant fluorine resin may be coated for the purpose of preventing scattering when the protective tube is broken. At this time, in order to improve the adhesive force between the quartz glass and the resin, for example, a shot blast of about 30 μm may be applied to the glass surface.

  The ultraviolet illuminance meter 9 has a light receiving surface formed of a wavelength conversion element that converts ultraviolet light into visible light. The converted visible light is transmitted to a photoelectric conversion amplifier via an optical fiber (not shown). The Then, the photoelectric conversion amplifier converts the voltage value corresponding to the intensity of visible light, that is, the voltage value corresponding to the illuminance of ultraviolet rays, and detects the ultraviolet illuminance or the effective irradiation amount corresponding to the ultraviolet illuminance.

  The wavelength conversion element of the ultraviolet illuminance meter 9 is formed by using fluorescent glass obtained by mixing one or more fluorescent materials in quartz glass or the like as a main material. Fluorescent materials convert ultraviolet light from ultraviolet lamps into visible light, such as transition metal phosphors, rare earth phosphors, aromatic compounds, tungstates, and more specifically, for example, naphthalene, anthracene, magnesium tungstate, sulfide It can be appropriately selected from various fluorescent materials such as zinc and yttrium compounds.

  The wavelength conversion element can also be formed by mixing a fluorescent material with a synthetic resin such as acrylic or polycarbonate. Furthermore, the wavelength conversion element is formed by forming a layer in which the fluorescent material is mixed on the surface layer portion of the wavelength conversion element substrate made of quartz glass or synthetic resin in which the fluorescent material is not mixed. It can also be formed by applying a fluorescent material on the surface of the element substrate.

  In this way, an ultraviolet irradiation chamber 3 a in which the ultraviolet lamp 5 and the ultraviolet illuminance meter 9 are installed is formed inside the processing tank 3. The detailed configuration of the lamp protection tube 7 and the illuminometer protection tube 11 will be described later.

  Furthermore, a cleaning unit 13 is provided inside the processing tank 3 as a cleaning device for removing dirt on the outer surfaces of the lamp protection tube 7 and the illuminance meter protection tube 11, and at one end of the processing tank 3, A driving device 15 for moving the cleaning unit along the extending direction of the processing tank 3 is included in the driving device housing box 16. Furthermore, a plurality of guide bars 17 that move the cleaning unit 13 while sliding the cleaning unit 13 are installed in the processing tank 3 along the extending direction of the processing tank 3. Detailed configurations of the cleaning unit 13 and the driving device 15 will be described later.

  In the ultraviolet water treatment apparatus 1, water to be treated flows from the treatment water inlet 19 at the end of the treatment tank 3 on which the drive device 15 is not provided, and the microorganisms in the water are disinfected by ultraviolet irradiation inside the treatment tank 3. The water to be treated is discharged from the treated water outlet 20 formed in the body of the treatment tank 3 by performing sterilization, killing, decomposition of organic matter, oxidation treatment, and the like. The treated water inlet 19 may be formed in the vicinity of the end of the body of the treatment tank 3 where the treated water outlet 20 is not formed to allow the treated water to flow therethrough.

  In the present embodiment, the ultraviolet water treatment apparatus 1 is installed horizontally on the apparatus mounting base 21, but this is not limiting, and the ultraviolet water treatment apparatus 1 is installed and used vertically. It is also possible.

  Next, a detailed configuration of protection tube units such as the lamp protection tube 7 and the illuminance meter protection tube 11 will be described with reference to FIG. 2A is a side view of the overall configuration of the protective tube unit, FIG. 2B is a view taken along the line bb in FIG. 2A, and FIG. 2C is FIG. 2A. It is an arrow directional view of cc line.

  As shown in FIG. 2, six lamp protection tubes 7 that house the ultraviolet lamp 5 therein are arranged concentrically with respect to the cylindrical axis A of the treatment tank 3. One end thereof is held by a lamp holder 27 fixed to the end plate 23 by a bolt 27 ', and the other end is attached to the head flange 33 by a protective tube seal retainer 29, a protective tube retainer 31, a bolt 29' or the like. It is fixed.

  An illuminometer protective tube 11 that accommodates the ultraviolet illuminance meter 9 therein is disposed on the cylindrical axis A of the processing tank 3. Similarly to the lamp protection tube 7, one end is held by the lamp holder 27 fixed to the end plate 23 by a bolt 27 ′, and the other end is a protection tube seal retainer 29, a bolt 29 ′, and a protection tube retainer 31. For example, it is fixed to the head flange 33.

  In this way, the illuminance meter protection tube 11 is arranged on the cylindrical axis A of the treatment tank 3, and the lamp protection tube 7 is arranged concentrically with the illuminance meter protection tube 11, thereby obtaining an average illuminance in the treatment tank 3. Is set so that the UV intensity can be measured at an equal distance from each UV lamp 5.

  Then, four guide rods 17 that are moved concentrically with the cylindrical axis A of the processing tank 3 while sliding the cleaning unit 13 are arranged. The guide rod 17 is provided between the lamp protection tubes 7 on the same concentric circle as the lamp protection tubes 7. One end of the guide rod 17 is fixed to the end plate 23 by a bolt 32 ′ via a fixing member 32, and the other end is provided on the end plate 23 side of the head flange 33 via a fixing member 34. It is fixed to the fixing flange 35.

  The head flange 33 is formed with a feed screw hole 36 through which a feed screw, which will be described later, is inserted. The feed screw is rotatably supported by a feed screw bearing 38 of the end plate 23. Further, the end plate 23 is provided with a guide roller 37 used when the protective tube unit is moved. Thus, since the lamp protection tube 7 and the illuminometer protection tube 11 are configured as an integrated unit by the head flange 33, the guide rod 17, and the end plate 23, various water-sealed portions and guide rod slides are formed. Handling during maintenance inspection of parts etc. is easy.

  By the way, in the ultraviolet water treatment apparatus 1, the dissolved substance contained in the liquid to be processed that passes through the treatment tank 3 adheres to the outer surfaces of the lamp protection tube 7 and the illuminometer protection tube 11, and this adhering substance causes There are adverse effects such as a reduction in the processing effect due to a decrease in the amount of irradiated ultraviolet rays, and an error in measurement illuminance. In order to suppress this adverse effect, in the present embodiment, a cleaning device for removing dirt on the outer surfaces of the lamp protection tube 7 and the illuminance meter protection tube 11 is provided. Hereinafter, the details of the cleaning unit 13 which is a characteristic part of the present embodiment will be described with reference to FIG. 3.

  FIG. 3 is a perspective view of the cleaning unit 13. The cleaning unit 13 includes two cleaning frames 39 that are spaced apart in the direction of the cylindrical axis A, and four connecting pipes 41 that connect the cleaning frames 39. Each connecting pipe 41 is fixed to the cleaning frame 39 at both ends by bolts 41 ′ to connect the two cleaning frames. That is, the cleaning unit 13 is configured in a bowl shape in which two cleaning frames 39 are connected by the connecting pipe 41.

  Each cleaning frame 39 is formed with a protective tube through-hole 43 through which the six lamp protective tubes 7 and the illuminometer protective tube 11 are inserted. Further, guide rod through holes 45 through which the four guide rods 17 are respectively inserted are formed. Further, a feed screw through hole 47 is formed which is connected to the above-described drive device 15 and moves the cleaning unit 13 in the direction of the cylindrical axis A and through which the feed screw 46 schematically illustrated by a broken line is inserted. Thus, the feed screw 46 is provided in parallel to the illuminometer protective tube 11 and at a position where it does not interfere.

  The guide rod through hole 45 is formed in the guide rod 17 before the lamp protective tube 7 and the illuminometer protective tube 11 and the protective tube through hole 43 come into contact with the rotation of the cleaning frame 39 accompanying the rotation of the feed screw 46. The hole diameter is designed so that the guide rod through hole 45 comes into contact with the guide rod through hole 45.

  Each protective tube through-hole 43 is provided with a flexible removing member 49 that contacts the outer surfaces of the lamp protective tube 7 and the illuminometer protective tube 11. The removal member 49 can be made of a resin such as rubber having elasticity and ultraviolet resistance or corrosion resistance, or a synthetic resin, and has an annular shape so as to contact the outer surfaces of the lamp protection tube 7 and the illuminance meter protection tube 11. And is provided in each protective tube through-hole 43. Further, a feed nut 51 that is screwed into the feed screw 46 is fixed to the feed screw through hole 47 of one cleaning frame 39.

  Further, a position detection magnet 53 is provided in the vicinity of the protective tube through hole 43 through which the illuminometer protective tube 11 of the cleaning frame 39 is inserted in order to detect the amount of movement of the cleaning unit 13.

  Next, the drive unit 15 that moves the cleaning unit 13 by rotating the feed screw will be described with reference to FIG. As shown in FIG. 4, the drive device 15 has a drive screw shaft 55 whose one end is connected to the feed screw 46, and the other end of the drive screw shaft 55 is connected to the intermediate shaft 57. Further, the intermediate shaft 57 is connected to the drive motor 63 via the drive side clutch 59 and the motor side clutch 61.

  A cylinder side bearing 65, an oilless 67, and an intermediate shaft fixing collar 69 are provided on the outer periphery of the intermediate shaft 57. Further, an intermediate shaft housing 71 is provided on the outer periphery of the intermediate shaft 57 via a cylinder-side bearing 65, an oilless 67, an O-ring 73, and an X-ring 75. The ring 73 is pressed against the head flange 33 to seal the ultraviolet irradiation chamber 3 a and the driving device 15.

  Further, the intermediate shaft 57, the drive side clutch 59, the motor side clutch 61, and the members provided on the outer periphery of the intermediate shaft 57 are included in the motor base 76, and a part of the motor base includes the intermediate shaft 57. A rotation sensor 77 for detecting rotation is provided. Although not shown, the drive device 15 detects the rotational torque of the drive motor 63, and if the detected value exceeds a preset threshold value and becomes overloaded, a torque limiter that suppresses the rotational force. Is provided.

  When the drive motor 63 is driven, the rotational force is transmitted to the feed screw 46 through the intermediate shaft 57 and the drive screw shaft 55, the feed screw rotates, and the feed nut 51 and the feed nut fixed to the feed screw 46 are fixed. The rotational force is transmitted to the washed frame 39. Then, the cleaning frame 39 tries to rotate, but the guide rod through hole 45 formed in the cleaning frame 39 and the guide rod 17 come into contact with each other to become non-rotating, and the cleaning unit 13 slides on the guide rod. Move while moving.

  Since each cleaning frame 39 is provided with a rubber removing member 49 formed in an annular shape in conformity with the outer peripheral surfaces of the lamp protection tube 7 and the illuminance meter protection tube 11, each protection unit 13 is moved by the movement of the cleaning unit 13. Each protective tube can be cleaned by wiping off dirt adhering to the outer surface of the tube like a wiper.

  Here, since the illuminometer protection tube 11 exists at a position on the cylindrical axis A that is the center position of the cleaning frame 39, the feed screw that gives a propulsive force when the cleaning frame is moved is connected to the illuminometer protection tube. Therefore, it is supported in a freely rotating manner at a position that does not interfere with each other. That is, the driving force for moving the cleaning frame must be applied to a position that is eccentric from the center position of the frame. Then, if the cleaning frame has a single structure as in the prior art, a shackle (inching) motion may occur when the cleaning frame is moved, and the operation may not be stable.

  In this regard, in the present embodiment, as described above, the two cleaning frames 39 are connected by the connecting pipe 41 and integrated into a vertical shape, so that a plurality of points on the guide rod 17 are supported and slid. Therefore, the operation can be stabilized by suppressing the shackle (inching). In the present embodiment, the two cleaning frames 39 are connected. However, the present invention is not limited to this, and a plurality of cleaning frames may be connected to each other between adjacent ones. Further, by making the cleaning unit into a vertical shape in this way, the feeding distance of the cleaning device can be shortened by the distance between the cleaning frames at both ends.

  Further, according to the present embodiment, the rotation of the cleaning frame 39 is received by the guide rod 17, and the cleaning unit (each cleaning frame) is configured to move in the cylindrical axis direction while sliding on the guide rod. For example, it is possible to suppress adverse effects such as damage to each protective tube formed of quartz glass due to external force applied by rotation of the cleaning frame.

  In the present embodiment, an example in which the cleaning unit 13 moves in the cylindrical axis direction while the guide rod through-hole 45 and the guide rod 17 of each cleaning frame 39 slide is shown. For example, a door wheel or the like may be provided in the guide rod through hole 45 of the frame 39 so that the cleaning unit 13 rolls and slides on the guide rod 17. If the liquid to be treated contains fine foreign matter, the frictional resistance increases dramatically and the sliding noise increases, but this configuration can reduce the frictional resistance and lower the sliding noise. it can.

  In the present embodiment, an example in which the cleaning unit is moved using the drive motor has been described. However, the present invention is not limited to this, and for example, a driving mechanism that rotates the feed screw by turning a handle or the like is provided to perform manual cleaning. It is also possible to move the unit.

  In addition, the ultraviolet water treatment apparatus requires inspection once a year for wear deterioration of various water seal parts, sliding parts, removal members, etc., and each protective tube and guide rod in the treatment tank, and Workability at the time of inspection can be improved by making the cleaning unit an integral structure.

  Furthermore, in the present embodiment, as described above, the position detection magnet 53 for detecting the movement amount of the cleaning unit 13 is provided in the cleaning frame, thereby confirming the current position along the cylindrical axis A direction of the cleaning unit. be able to. According to this, for example, even though the cleaning unit has moved to the end in the treatment tank, it is possible to further apply a driving force to apply unnecessary external force to the cleaning unit, the guide rod, or each protective tube. Can be suppressed. Further, by providing a rotation sensor 77 for detecting the rotation of the intermediate shaft 57 of the driving device, the relationship between the rotation speed and the movement distance is known, so the current position along the direction of the cylindrical axis A of the cleaning unit is similarly confirmed. be able to.

  In addition, by providing a rotational torque limiter in the drive unit, when the rotational load becomes large for some reason, the rotational force is suppressed, and unnecessary deformation is applied to the cleaning unit, the guide bar, or each protective tube to deform it. , And can be prevented from being damaged.

  Note that a temperature sensor that detects the temperature of the water to be treated may be provided in the treatment tank 3 of the ultraviolet water treatment apparatus of the present embodiment described above so that a temperature abnormality can be detected. Since the lifetime of the ultraviolet lamp is shortened due to the temperature rise in the processing tank, the temperature in the processing tank may be detected by a temperature sensor, and the lighting and extinguishing of the ultraviolet lamp may be controlled based on this. In addition, a cap may be provided on the lamp protection tube 7 and the illuminance meter protection tube 11 to prevent internal condensation, and a dehumidification unit that supplies dry air by replacing the air inside the protection tube may be provided. Furthermore, condensation inside the protective tube may be prevented by providing silica gel or the like inside the protective tube.

It is a figure which shows schematic structure of the ultraviolet-ray water treatment apparatus formed by applying this invention. (A) is a top sectional view, (b) is a side view. It is a figure which shows the structure of protection tube units, such as a lamp protection tube and an illumination meter protection tube. It is a figure which shows the structure of a washing | cleaning unit. It is a figure which shows the structure of the drive device of a washing | cleaning unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ultraviolet water treatment apparatus 3 Processing tank 5 Ultraviolet lamp 7 Lamp protection tube 9 UV illuminance meter 11 Illuminance meter protection tube 13 Cleaning unit 15 Driving device 17 Guide rod 39 Cleaning frame 41 Connecting tube 43 Protection tube through hole 45 Guide rod through hole 46 Feed screw 47 Feed screw through hole 49 Removal member 51 Feed nut

Claims (4)

A cylindrical container through which water to be treated is circulated, a plurality of glass lamp protective tubes arranged concentrically with respect to the cylindrical axis of the container and containing an ultraviolet lamp therein, and the cylindrical axis of the container An ultraviolet water comprising a glass illuminometer protective tube disposed on the inside and containing an ultraviolet illuminance meter, and a cleaning device for removing dirt on the outer surface of the lamp protective tube and the illuminometer protective tube In the processing device,
The cleaning apparatus includes a cleaning unit, and driving means for moving the cleaning unit in the cylindrical axis direction,
The drive means includes a feed screw that is rotatably supported in a position parallel to the illuminometer protective tube and that does not interfere, and a drive mechanism that rotates the feed screw.
The cleaning unit includes a plurality of cleaning frames each having a plurality of protection tube through holes through which the plurality of lamp protection tubes and the illuminance meter protection tube are inserted, and a feed screw through hole through which the feed screw is inserted. A connecting member that connects the plurality of cleaning frames at intervals in the cylindrical axis direction, and the plurality of protective tube penetrating so as to be in contact with the outer surfaces of the plurality of lamp protective tubes and the illuminance meter protective tube. An ultraviolet water treatment apparatus comprising: a flexible removing member provided in a hole; and a feed nut fixed to one of the feed screw through holes of the plurality of cleaning frames by being screwed into the feed screw . The plurality of lamp protection tubes, the illuminance meter protection tube, and a guide rod supported in a position not interfering with the feed screw and the guide rod formed on the plurality of cleaning frames are inserted. A guide rod through hole
The guide rod through-hole is arranged so that the plurality of lamp protection tubes, the illuminance meter protection tube, and the protection tube through-hole come into contact with each other by rotation of the cleaning frames accompanying rotation of the feed screw. 2. The ultraviolet water treatment apparatus according to claim 1, wherein the cleaning unit is configured to move in the cylindrical axis direction while sliding on the guide rod in contact with the guide rod through hole.   The ultraviolet water treatment apparatus according to claim 2, wherein a door wheel is provided in the guide rod through hole of each cleaning frame, and the cleaning unit rolls and slides on the guide rod.   The ultraviolet water treatment apparatus according to claim 1, comprising at least one of a position detection sensor that detects a position of the cleaning unit along the cylindrical axis direction and a rotational torque limiter of the driving unit.

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