JP2007021434A - Wiping-off mechanism for ultraviolet irradiation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the wiping-off mechanism for an ultraviolet irradiation system capable of enhancing the control precision of a wiper moving range. <P>SOLUTION: The wiping-off mechanism for the ultraviolet irradiation system is equipped with: the annular wiper 27 mounted on the outer surface of an ultraviolet transmission pipe 3 in a slidable manner; a locking member 33 locked with the wiper 27 to be moved in the extending direction of the ultraviolet transmission pipe 3; a rotary shaft 31 having a threaded outer peripheral surface becoming a moving means for moving the locking member 33 in the extensional direction of the ultraviolet transmission pipe 3; an electromotor 29 connected to one end of the rotary shaft 31 to rotate the rotary shaft 31; number-of-rotation detecting means 39 and 61 for detecting the number of rotations of the rotary shaft 31; a magnet 55 attached to the locking member 33; a magnetism detecting means 57 for detecting the magnetism of the magnet 55 when the locking member 33 is located at a standby position; and a control means 11 for controlling the moving range of the locking member 33 by the moving means. The control means 11 controls the moving range of the locking member 33 from the number of rotations detected by the number-of-rotation detecting means 39 and 61 and locates the locking member 33 to the standby position of the locking member 33 by detecting the magnetism of the magnet 55 by the magnetism detecting means 57. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiping mechanism for an ultraviolet irradiation device, and more particularly to a wiping mechanism for an ultraviolet irradiation device that performs ultraviolet irradiation processing on a fluid.

  For example, the ultraviolet irradiation device is configured by installing an ultraviolet lamp in a flow path through which the fluid to be treated flows or a tank in which the fluid to be treated is accommodated to kill microorganisms in the fluid to be treated, oxidative decomposition of organic matter, Decomposes toxic substances. In such an ultraviolet irradiation device, the ultraviolet lamp is installed in a flow path, a tank or the like in a state where it is inserted in an ultraviolet transmission tube capable of transmitting ultraviolet rays so that the fluid to be treated does not come into direct contact with the ultraviolet lamp. It has become. However, since the outer surface of the ultraviolet ray permeable tube is in contact with the fluid to be treated, microorganisms, organic substances, etc. in the fluid to be treated adhere to the outer surface of the ultraviolet ray permeable tube, and this deposit reduces the amount of ultraviolet irradiation to the fluid to be treated. descend.

  In order to prevent such a decrease in the ultraviolet irradiation capacity, an annular wiper is slidably attached to the outer surface of the ultraviolet transmission tube, and by removing the outer surface of the ultraviolet transmission tube with this wiper, the deposits are removed. A wiping mechanism that prevents the outer surface of the UV transmitting tube from being contaminated has been proposed. Such a wiping mechanism for the ultraviolet irradiation device includes an engaging member that engages with the wiper, a moving means for moving the engaging member in the extending direction of the ultraviolet transmitting tube in which the ultraviolet lamp is inserted, and the like. (For example, refer to Patent Documents 1-3).

JP-A-8-243554 (page 4-5, FIG. 3) JP 2000-321400 A (page 2-4, FIG. 1, FIG. 2) JP 2003-236534 A (page 4-5, FIG. 1)

  By the way, in such a wiping mechanism for an ultraviolet irradiation device, when the operation of the wiping mechanism is performed automatically, unless the movement range of the wiper relative to the ultraviolet transmission tube is controlled as accurately as possible, the movement of the wiper may be hindered. Further, there is a possibility that the necessary range of the ultraviolet ray transmitting tube cannot be wiped off and the ultraviolet ray irradiation amount cannot be suppressed from being lowered. Therefore, it is necessary to improve the control accuracy of the wiper movement range.

  On the other hand, in the conventional wiping mechanism for an ultraviolet irradiation device as described in Patent Documents 1 to 3, no consideration is given to improving the control accuracy of the movement range of the wiper.

  The subject of this invention is improving the control precision of the movement range of a wiper.

  The wiping mechanism for the ultraviolet irradiation device of the present invention includes an annular wiper that is slidably mounted on the outer surface of an ultraviolet transmissive tube through which an ultraviolet lamp is inserted and that is slidable. An engaging member that moves in the extending direction of the tube, a moving means that moves the engaging member in the extending direction of the UV transmitting tube, a magnet attached to the engaging member, and the engaging member is positioned at the standby position. A magnetism detecting means for detecting the magnetism of the magnet when the magnet is moving, and a control means for controlling the moving range of the engaging member by the moving means, the magnetism detecting means detecting the magnetism of the magnet. Accordingly, the above-described problem is solved by positioning the engaging member at the standby position.

  By setting it as such a structure, an engagement member can be positioned in a standby position because a magnetic detection means detects the magnetism of the magnet attached to the engagement member. For this reason, since the movement of the engaging member and the wiper can be started from a certain standby position, the movement range of the wiper becomes difficult to change, and the control accuracy of the movement range of the wiper can be improved.

  Further, the moving means has a rotating shaft that is threaded on the outer peripheral surface and is installed in parallel with the ultraviolet ray transmitting tube, and an electric motor that is connected to one end of the rotating shaft and rotates the rotating shaft, and is engaged. The member has a through hole in which a screw corresponding to a screw cut on the outer peripheral surface of the rotating shaft is cut on the inner peripheral surface and screwed into the rotating shaft, and a rotation number detecting means for detecting the rotation number of the rotating shaft And the control means controls the moving range of the engaging member based on the rotational speed detected by the rotational speed detecting means, and the magnetic detecting means detects the magnetism of the magnet to position the engaging member at the standby position. And

  As described above, when the movement range of the engagement member is controlled by the rotation speed detected by the rotation speed detection means, the rotation speed detection means serving as the movement range control unit has the magnetic detection means attached to the engagement member. By detecting the magnetism of the magnet, the standby position of the engaging member is determined, the motor is stopped, and the rotational speed is corrected or corrected, for example, the rotational speed count state is reset. The moving range becomes more difficult to change, and the control accuracy of the wiper moving range can be further improved.

  Further, the magnet surface is covered with an organic compound having ultraviolet resistance. The magnetic detection means is configured to be installed in a sealed container that can transmit magnetism. The airtight container in which the magnetic detection means is installed is configured to be the same ultraviolet ray transmitting tube as the ultraviolet ray transmitting tube capable of transmitting the ultraviolet ray into which the ultraviolet lamp is inserted. Thereby, even when it is a case where it uses for the ultraviolet irradiation device which irradiates ultraviolet rays to corrosive fluid etc., damage to a magnet or a magnetic detection means can be controlled.

  Further, the ultraviolet irradiation device of the present invention includes an ultraviolet transmissive tube capable of transmitting ultraviolet light in which an ultraviolet lamp is inserted, and a wiping mechanism for wiping the outer surface of the ultraviolet transmissive tube to remove deposits on the outer surface of the ultraviolet transmissive tube. The above-mentioned problem is solved by adopting a configuration including any one of the wiping mechanisms as the wiping mechanism.

  According to the present invention, the control accuracy of the wiper movement range can be improved.

  Hereinafter, an embodiment of a wiping mechanism and an ultraviolet irradiation device to which the present invention is applied will be described with reference to FIGS. 1 to 6. FIG. 1 is a diagram showing a schematic configuration of an ultraviolet irradiation apparatus provided with a wiping mechanism to which the present invention is applied, in a state where a tank is cut in section and a portion provided with a magnetic detection switch of an ultraviolet transmission tube is broken. It is a front view shown by. FIG. 2 is a diagram showing a schematic configuration of an ultraviolet irradiation apparatus having a wiping mechanism to which the present invention is applied in an enlarged view of the periphery of the standby position of the wiper, with the tank in cross section and the magnetism of the ultraviolet transmission tube. It is a front view shown in the state where a portion provided with a detection switch was broken. FIG. 3 is a diagram showing a schematic configuration of a wiper holder and a wiper of a wiping mechanism to which the present invention is applied, and is a plan view showing a state where an upper lifting nut holding plate is removed. FIG. 4 is a sectional view showing the structure of the magnet of the wiping mechanism to which the present invention is applied. FIG. 5 is a diagram showing a mounting structure of a magnetic detection switch of a wiping mechanism to which the present invention is applied. FIG. 6 is a plan view showing a structure of a rotational speed detection disk of a wiping mechanism to which the present invention is applied.

  As shown in FIG. 1, the ultraviolet irradiation device of this embodiment includes an ultraviolet lamp 1, an ultraviolet transmission tube 3 in which the ultraviolet lamp 1 is inserted, a wiping mechanism 5 for wiping the outer surface of the ultraviolet transmission tube 3, and an ultraviolet transmission tube 3. It comprises a tank 7 installed inside, a support frame 9 that supports the tank 7, a control unit 11 that controls the operation of the UV lamps and the operation of the wiping mechanism 5, and a control panel 11 having operation switches.

  The ultraviolet transmissive tube 3 is a cylindrical straight tube made of an ultraviolet transmissive material such as quartz glass or polytetrafluoroethylene and having an inner diameter into which a straight tubular ultraviolet lamp 1 having a base inserted into a socket can be inserted. It is. A seal gland 13 is attached to both ends of the ultraviolet transmissive tube 3, and the ultraviolet transmissive tube 3 is fixed to the tank 7 by the seal gland 13. The seal gland 13 is formed of a metal such as stainless steel, which is not easily affected by ultraviolet rays, or a synthetic resin. The seal gland 13 is a substantially cylindrical member having both ends open, and is fixed to the tank 7 in a watertight manner.

  A plurality of such ultraviolet transmissive tubes 3 are installed in the tank 7 and two in the present embodiment, but the ultraviolet lamp 1 is not inserted in one of them. Although not shown, the wiring from the socket is guided to the outside through the seal ground 13, and this wiring (not shown) is electrically connected to a control unit in the control panel 11.

  The tank 7 of this embodiment is a cylindrical tank formed of a corrosion-resistant material that is not easily affected by ultraviolet rays, such as a metal such as stainless steel or a synthetic resin, and has flanges 7a at both ends. 7b is provided. A disk-shaped top plate 15 corresponding to the flange 7a is provided on the upper flange 7a of the tank 7, and a disk-shaped bottom plate 17 corresponding to the flange 7b is provided on the lower flange 7b of the tank 7, respectively. It fixes by the state where the sealing member which is not illustrated is inserted | pinched with fixing tools, such as, and, thereby, the both ends of the tank 7 are obstruct | occluded in the airtight state. The lower part of the side wall of the tank 7 has a tubular shape with a flange formed at the end, and an inlet part 7c serving as an inlet into the tank 7 for the fluid to be treated is provided on the upper part of the side wall of the tank 7. Each of the outlets 7d is a tube having a flange formed at the end, and serves as an outlet from the tank 7 of the fluid to be processed.

  Similarly to the tank 7, the top plate 15 and the bottom plate 17 are also made of a material that is hardly affected by ultraviolet rays and has anticorrosive properties, and the top plate 15 and the bottom plate 17 are formed with through holes at corresponding positions. The seal gland 13 is fixed in a watertight manner to these through holes. In the present embodiment, at the positions of the top plate 15 and the bottom plate 17 such that the two ultraviolet light transmission tubes 3 are installed in the tank 7 in parallel across the central axis in the longitudinal direction of the tank 7, A seal gland 13 is attached. The end portion on the side of the large diameter located outside each seal gland 13 is in a state protruding from the top plate 15 or the bottom plate 17 to the outside of the tank 7. Further, as shown in FIG. 2, the seal gland 13 has an O-ring 20 between the top plate 15 and the end of the seal gland 13 having a small diameter inserted into the through hole of the top plate 15 or the bottom plate 17. Although not shown, the bottom plate 17 side has the same structure.

  As shown in FIG. 2, a through hole is formed at a position corresponding to the central axis in the longitudinal direction of the tank 7 of the top plate 15, and a cylindrical bearing 21 is formed in this through hole from the outside of the tank 7. However, a cylindrical shaft seal 23 is attached from the inside. As shown in FIG. 1, a bearing 25 is provided on the inner surface of the tank 7 at a position corresponding to the longitudinal center axis of the tank 7 of the bottom plate 17. Of the seal gland 13 fixed to the bottom plate 17 side, the diameter of the seal gland 13 is at the end of the seal gland 13 that fixes the ultraviolet transmitting tube 3 in which the ultraviolet lamp 1 is inserted. A disc-shaped light-shielding bottom plate 13a is attached to block the end portion on the large side and prevent the ultraviolet lamp from falling off or to shield the light.

  As shown in FIGS. 1 and 2, the wiping mechanism 5 is connected to an annular wiper 27 for wiping the outer surface of the ultraviolet transmission tube 3, a reduction motor 29 for moving the wiper 27, and a shaft of the reduction motor 29. The rotary shaft 31 is provided with a wiper holder 33 that moves while being guided by the rotary shaft 31 and that is engaged with the wiper 27 and serves as an engaging member that moves the wiper 27. The reduction motor 29 is supported by a support bar 35 above the center of the top plate 15, that is, above the bearing 21. Although not shown, the lower end of the support bar 35 is attached to the top plate 15.

  The rotating shaft 31 is made of a corrosion-resistant material that is hardly affected by ultraviolet rays, such as stainless steel, and is connected to the shaft of the reduction motor 29 via a coupling 37. A rotational speed detection disk 39 is attached to the end of the coupling 37 on the rotating shaft 31 side, that is, the end on the top plate 15 side. A rotation shaft 31 extending in the direction from the rotation speed detection disk 39 to the center portion of the top plate 15 is inserted into a bearing 21 and a shaft seal 23 attached to the top plate 15, so that the center portion in the tank 7, that is, two pieces. Between the two UV transmitting tubes 3, the two UV transmitting tubes 3 are suspended in parallel. As shown in FIG. 1, the end of the rotation shaft 31 opposite to the side on which the rotation speed detection disk 39 is attached is rotatably supported by a bearing 25 provided at the center of the inner surface of the bottom plate 17. Yes. A portion of the outer peripheral surface of the rotary shaft 31 between the shaft seal 23 and the bearing 25 is threaded.

  The wiper 27 is an annular member formed of a material that is hardly affected by ultraviolet rays and has anticorrosive properties, for example, a metal such as stainless steel or a synthetic resin such as fluorine rubber, and has an inner diameter that is equal to the outer diameter of the ultraviolet transmissive tube 3. It is the same, and the ultraviolet transmissive tube 3 can be inserted. As the wiper, various members such as an annular brush can be used as long as the outer surface of the ultraviolet transmission tube 3 can be wiped off.

  As shown in FIGS. 2 and 3, the wiper holder 33 has a rectangular box-like shape made of a material that is hardly affected by ultraviolet rays and has an anticorrosive property, such as a metal such as stainless steel or a synthetic resin such as polytetrafluoroethylene. It is a member. In the present embodiment, the central portion of the wiper holder 33 is a nut portion 33 a that is screwed into a screw cut on the outer peripheral surface of the rotary shaft 31, and the portion protruding from the central portion of the wiper holder 33 to both sides is the wiper 27. It is the engaging part 33b which engages.

  The upper and lower surfaces of the wiper holder 33 are open except for the nut portion 33a at the center. Square plate-like lifting nut pressing plates 41 and 43 are attached to the upper and lower surfaces of the nut portion 33a, respectively. In a closed state. The space between the upper lifting / lowering nut pressing plate 41 and the lower lifting / lowering nut pressing plate 43, that is, the space in the nut portion 33 a of the wiper holder 33 corresponds to the screw cut on the outer peripheral surface of the rotary shaft 31. A lifting nut 45 in which a screw is cut on the inner peripheral surface of the through hole 45a is installed.

  As shown in FIG. 3, as shown in FIG. 3, ascending / descending nut stoppers 47 projecting toward the inside of the wiper holder 33 are provided on the upper edge portion and the lower edge portion of the inner surface of the side wall of the nut portion 33 a of the wiper holder 33. ing. The lift nut stopper 47 is formed in a U-shape in which both end portions protrude toward the inside of the wiper holder 33 from the central portion when viewed from the upper surface side or the lower surface side of the wiper holder 33, and two opposing lift nut stoppers 47, the lifting nut 45 is enclosed.

  In this way, the lifting nut 45 is installed in a state surrounded by the upper lifting nut pressing plate 41, the lower lifting nut pressing plate 43, and the lifting nut stopper 47, so that the inside of the nut portion 33 a of the wiper holder 33 is installed. Positioned in space. At this time, the width between the inner edges of both end portions of the lifting nut stopper 47, the width between the inner edges of the central portions of the opposing lifting nut stoppers 47, the inner surface of the upper lifting nut pressing plate 41 and the lower lifting nut pressing plate The width between the inner surfaces of 43 is formed larger than the width of the corresponding portion of the lifting nut 45. Therefore, there are appropriate gaps 49 between the elevating nut stopper 47 and the elevating nut 45 and between the upper elevating nut holding plate 41 and the lower elevating nut holding plate 43 and the elevating nut 45. Is a space in the nut portion 33a of the wiper holder 33 and is movable up and down, left and right, and back and forth within the gap 49.

  Further, the lifting nut stopper 47 of this embodiment also serves as a base for attaching the upper lifting nut pressing plate 41 and the lower lifting nut pressing plate 43 to the nut portion 33a of the wiper holder 33. Therefore, screw holes 47a for attaching the upper elevating nut holding plate 41 and the lower elevating nut holding plate 43 with bolts (not shown) are provided at both ends of each elevating nut stopper 47. In FIG. 3, only two lifting nut stoppers 47 provided at the upper edge portion of the wiper holder 33 are illustrated, and the lifting nut stopper 47 provided at the lower edge portion in the same shape is illustrated. Not shown. FIG. 3 shows a state in which the upper elevating nut pressing plate 41 is removed for easy understanding of the structure of the wiper holder 33.

  As shown in FIGS. 2 and 3, the wiper 27 is a slot 51 which is a rectangular through hole formed at a corresponding position on each of two side surfaces facing the end surface of the engaging portion 33 b of the wiper holder 33. Is engaged. The wiper holder 33 of the present embodiment includes two engaging portions 33b sandwiching the nut portion 33a. Each of the engaging portions 33b corresponds to the corresponding ultraviolet transmissive tube 3 and the wiper 27 attached to the ultraviolet transmissive tube 3. It is installed in a state surrounding it. As a result, the edge portions of the wiper 27 corresponding to the end surface of the engaging portion 33b of the wiper holder 33 and the two opposing side surfaces project from the inside of the slot 51 of the engaging portion 33b of the wiper holder 33 to the outside. The wiper 27 is engaged with the engaging portion 33 b of the wiper holder 33.

  The slot 51 is formed larger than the thickness and width of the edge portion inserted into the slot 51 of the wiper 27. For this reason, there is an appropriate gap between the edge portion inserted into the slot 51 of the wiper 27 and the inner surface of the slot 51, and the wiper 27 is movable up and down, left and right, and front and rear within the gap. It has become. Therefore, even when the upper inner surface portion or the lower inner surface portion of the slot 51 of the engaging portion 33b of the wiper holder 33 is in contact with the wiper 27 to move the wiper 27, the wiper 27 can move in the horizontal direction. It has become.

  Furthermore, in the present embodiment, a magnet holder 53 is provided on one engaging portion 33 b of the wiper holder 33, and a magnet 55 is fixed to the magnet holder 53. The magnet holder 53 is formed of a material that is hardly affected by ultraviolet rays and has anticorrosive properties, such as a metal such as stainless steel or a synthetic resin such as polytetrafluoroethylene, and the wiper holder is directed toward the extending direction of the ultraviolet transmissive tube 3. It is provided in a state protruding from the engaging portion 33 b of 33. A magnet 55 is fixed to the portion of the magnet holder 53 protruding from the engaging portion 33 b of the wiper holder 33 by an appropriate method such as using a set screw 56.

  As shown in FIG. 4, in order to prevent corrosion, the magnet 55 has an ultraviolet resistant organic material such as a synthetic resin that is resistant to the influence of ultraviolet rays such as polytetrafluoroethylene and has an anticorrosive property. It is covered with a coating layer 55b formed of a compound. In the present embodiment, the magnet holder 53 protrudes upward from the engaging portion 33 b of the wiper holder 33 along the extending direction of the ultraviolet ray transmissive tube 3, and the magnet 55 is provided on the wiper holder 33 of the magnet holder 53. It is attached to a portion protruding upward from the engaging portion 33b. In the present embodiment, the ultraviolet lamp 1 is not inserted into one of the two ultraviolet transmission tubes 3 installed, but the magnet holder 53 and the magnet 55 are inserted with the ultraviolet lamp 1 of the wiper holder 33. It is attached to the engaging portion 33b located on the non-ultraviolet transmitting tube 3 side.

  In the ultraviolet transmissive tube 3 positioned on the side of the engaging portion 33b to which the magnet 55 of the wiper holder 33 is attached, that is, in the ultraviolet transmissive tube 3 in which the ultraviolet lamp 1 is not inserted in this embodiment, FIG. As shown in FIG. 3, a magnetic detection switch 57 serving as a magnetic detection means for detecting the magnetism of the magnet 55 is provided. The magnetic detection switch 57 is installed at a position where the switch operates by detecting the magnetism of the magnet 55 when the wiper holder 33 reaches the standby position of the wiper holder 33 illustrated in FIG. The magnetic detection switch 57 can be disposed at a predetermined position in the ultraviolet lamp 1 by various methods. For example, as shown in FIG. 5, an attachment 59 for attaching the magnetic detection switch 57 to a predetermined position using the seal ground 13 can be used.

  The attachment tool 59 was stretched over the end surface of the seal gland 13 mounted on the upper side of the ultraviolet transmission tube 3 where the magnetic detection switch 57 is installed, outside the tank 7 in the diameter direction of the end surface of the seal gland 13. The fixing part 59a has a mounting plate part 59b through which the seal gland 13 is inserted from the fixing part 59a and suspended in the ultraviolet transmissive tube 3 to which the magnetic detection switch 57 is attached. The fixing portion 59 a of the attachment 59 is fixed to the end portion of the seal gland 13 with a screw 59 c using the outer peripheral surface of the seal gland 13.

  The attachment plate portion 59b is a belt-like member having a T-shaped cross section, and a magnetic detection switch 57 is attached to the flat surface side by screws 59d. By adjusting the length of the attachment plate portion 59b and the attachment position of the magnetic detection switch 57 to the attachment plate portion 59b, the switch operates by detecting the magnetism of the magnet 55 when the wiper holder 33 comes to the standby position. The magnetic detection switch 57 is disposed at such a position. In addition, the magnetic detection switch 57 is connected to a terminal 57a by a wiring (not shown), and is electrically connected to a control unit or the like in the control panel 11 via the wiring (not shown).

  As shown in FIGS. 1 and 2, the rotational speed detection means of the present embodiment is used for rotational speed detection that detects the rotational speed of the rotational speed detection disk 39 attached to the rotary shaft 31 and the rotational speed detection disk 39. The switch 61 and a rotation number counter included in a control unit in the control panel 11 are configured. As shown in FIG. 6, the rotational speed detection disk 39 is a metal disk, and is provided at equal intervals at positions where a circle centered on the center of the rotational speed detection disk 39, that is, the center of the rotation shaft 31 is drawn. Four circular through holes 39a having the same diameter are formed. The rotation speed detection switch 61 is fixed above the rotation speed detection disk 39 by using a support bar 35 that supports the reduction motor 29 on the top plate 15 as shown in FIGS. Yes.

  Further, as shown in FIGS. 1, 2 and 6, when the rotational speed detection disk 39 is rotated by the rotation of the rotary shaft 31, the rotational speed detection switch 61 is interposed between the four circular through holes 39a. Four metal portions 39b of the rotational speed detection disk 39 located are detected. Accordingly, the rotation speed detection switch 61 of the rotation speed detection means detects the metal portion 39b four times and generates pulses serving as four detection signals when the rotation speed detection disk 39 makes one rotation. The rotation number counter of the control unit in the control panel 11 receives a pulse transmitted when the rotation number detection switch 61 of the rotation number detection means detects the metal portion 39b, receives four pulses, and receives the rotation axis. The number of rotations of the rotating shaft 31 is counted on the assumption that 31 has made one rotation.

  When the control unit in the control panel 11 starts the operation of the wiping mechanism 5, the reduction motor 29 is operated until the rotation number detected by the rotation number counter based on the signal from the rotation number detection switch 61 becomes a preset rotation number. , And the rotational speed detected by the rotational speed counter reaches a preset rotational speed, this time, the reduction motor 29 is reversely driven and the rotary shaft 31 is rotated in the reverse direction. As a result, the wiper holder 33 moves from the standby position to the end of the rotary shaft 31 and reciprocates from the end of the rotary shaft 31 to the standby position. That is, the wiper 27 slides back and forth on the outer surface of the ultraviolet transmissive tube 3.

  Further, the control unit in the control panel 11 is configured such that when the wiper holder 33 moves from the standby position to the end of the rotary shaft 31 and returns from the end of the rotary shaft 31 to the standby position, a magnetic detection switch 57 serving as a magnetic detection means The standby position is detected by detecting the magnetism of the magnet 55 attached to the wiper holder 33. When the control unit in the control panel 11 detects the standby position, it stops the reduction motor 29 regardless of the rotational speed of the rotary shaft 31, and sets the rotational speed of the rotational speed counter stored in the rotational speed counter to zero. Reset.

  The support frame 9 is made of an anticorrosive material, for example, a metal such as stainless steel or aluminum, or a synthetic resin, and is connected to the upper flange 7a and the lower flange 7b of the tank 7 via a connecting member 63. The tank 7 is supported by this. The support frame 9 also supports the control panel 11.

  In the present embodiment, the outer peripheral surface is threaded, and the rotary shaft 31 installed parallel to the ultraviolet transmissive tube 3, the reduction motor 29 that rotates the rotary shaft 31, and the like constitute moving means, and the control panel 11 The inner control unit constitutes a control means for controlling the moving range of the engaging member, that is, the wiper holder 33 by the moving means. Moreover, in this embodiment, the example which installed in the control panel 11 the control part which controls lighting of the ultraviolet lamp 1, the action | operation of the wiping mechanism 5, the movement range of the wiper holder 33 of the wiping mechanism 5, etc. as one control part is shown. ing. However, the control unit can be divided into a plurality of control units as appropriate for each function, or can be integrated into one control unit as in this embodiment.

  The operation of the ultraviolet irradiating device and the wiping mechanism having such a configuration, the features of the present invention, etc. will be described. In the ultraviolet irradiation device of the present embodiment, as shown in FIG. 1, the fluid to be processed, which is provided in the lower portion of the side wall of the tank 7, flows into the tank 7 from the inlet portion 7 c serving as an inlet into the tank 7. A fluid to be treated, for example, water to be treated flows in the tank 7 along the extending direction of the ultraviolet transmissive tube 3, in the present embodiment, upward from the bottom side of the tank 7. At this time, since the water to be treated is irradiated with ultraviolet rays from the ultraviolet lamp 1 installed in the ultraviolet transmissive tube 3, killing of microorganisms in the water to be treated, decomposition of organic substances, decomposition of other toxic substances, etc. Done. The water to be treated which has been irradiated with the ultraviolet rays flows out from the outlet portion 7d serving as an outlet from the inside of the tank 7 of the fluid to be treated provided in the upper portion of the side wall of the tank 7, and is sent to the next process or the like.

  Thus, since the ultraviolet transmissive tube 3 is immersed in the water to be treated, if the ultraviolet irradiation treatment of the water to be treated is continued, microorganisms, organic substances, etc. in the water to be treated are deposited on the outer surface of the ultraviolet transmissive tube 3. It adheres and the ultraviolet irradiation ability to to-be-processed water falls. For this reason, in this embodiment, the control part of the control board 11 has a timer, and when the preset time process is performed, the wiping mechanism 5 is operated. That is, the control unit of the control panel 11 drives the reduction motor 29 of the wiping mechanism 5 at a preset time interval. When the reduction motor 29 is driven, the rotating shaft 31 rotates. Therefore, as shown in FIGS. 1 to 3, the wiper holder 33 having a nut 45 screwed into a screw cut on the outer peripheral surface of the rotating shaft 31. Moves downward from the standby position. Accordingly, the wiper 27 engaged with the slot 51 of the wiper holder 33 moves integrally with the wiper holder 33 and slides on the outer surface of the ultraviolet ray transmissive tube 3.

  The rotation speed counter of the control unit in the control panel 11 receives the pulse signal from the rotation speed detection switch 61 and counts the rotation speed of the rotary shaft 31 with the rotation speed counter. At this time, the control unit in the control panel 11 drives the reduction motor 29 until the rotation number counted by the rotation number counter reaches a preset rotation number. The rotation speed set here is the rotation speed at which the wiper holder 33 descends from the standby position to the lower limit position of the movement range, for example, the position of the lower end portion of the rotation shaft 31 that does not hit the bearing 25.

  When the wiper holder 33 reaches the lower limit position of the movement range from the standby position and the rotation number counted by the rotation number counter reaches the preset rotation number, the control unit in the control panel 11 reversely drives the reduction motor 29 to rotate the rotation shaft. 31 is reversely rotated. As a result, the wiper holder 33 having the nut 45 screwed into the screw cut on the outer peripheral surface of the rotating shaft 31 is now moved upward from the lower limit position. Thereby, the wiper holder 33 reciprocates in the movement range from the standby position to the lower limit position. As the wiper holder 33 reciprocates, the wiper 27 engaged with the slot 51 of the wiper holder 33 slides back and forth on the outer surface of the ultraviolet transmission tube 3, so that the wiper 27 wipes the outer surface of the ultraviolet transmission tube 3. Remove deposits.

  Furthermore, when the wiper holder 33 rises from the lower limit position and returns to the standby position, the control unit in the control panel 11 receives a signal generated by the magnetism detection switch 57 detecting the magnetism of the magnet 55 attached to the wiper holder 33. Then, the reduction motor 29 is stopped regardless of the rotation number counted by the rotation number counter, and the rotation number counted and stored by the rotation number counter is reset to zero. The number of times the wiper 27 is reciprocated by one operation of the wiping mechanism can be set as appropriate according to the type of fluid to be treated.

  Here, for example, when the movement range of the wiper is controlled by the rotation speed of the rotation shaft that moves the engagement member such as the wiper holder as in the wiping mechanism of the present embodiment, the rotation speed is caused by a miscount of the rotation speed. If a deviation occurs between the number of rotations counted by the counter and the actual position of the wiper holder, the position at which the wiper holder stops becomes a position deviated from the set standby position. When the movement of the wiper holder is started from a position deviated from the set standby position, the lower limit position is also deviated, and the wiper movement range is changed. In such a case, the movement range of the wiper may change every time the operation of the wiping mechanism is repeated. As described above, if the movement range of the wiper is changed, there is a possibility that the movement of the wiper may be hindered, or that the necessary range of the ultraviolet transmission tube cannot be cleaned and the decrease in the ultraviolet irradiation amount cannot be suppressed. There is.

  On the other hand, in the ultraviolet irradiation device provided with the wiping mechanism 5 and the wiping mechanism 5 of the present embodiment, the magnet 55 is attached to the wiper holder 33 that is an engaging member, and when the wiper holder 33 comes to the standby position, the magnetism is increased. When the magnetism detection switch 57 serving as a detecting means detects the magnetism of the magnet 55, the wiper holder 33 is stopped at the set standby position. For this reason, the wiper holder 33 can be positioned at the set standby position, and the movement of the wiper holder 33 can be started from the set standby position. That is, since the standby positions of the wiper holder 33 and the wiper 27 do not change, the movement range of the wiper becomes difficult to change, and the control accuracy of the movement range of the wiper can be improved.

  Further, since the magnetic detection switch 57 serving as a magnetic detection means is used, the magnetic detection switch 57 is installed in the ultraviolet transmissive tube 3 serving as a container capable of transmitting magnetism. Therefore, the contact between the fluid to be processed and the magnetic detection switch 57 serving as the magnetic detection means can be suppressed, the occurrence of problems such as malfunction of the magnetic detection switch 57 can be suppressed, and the engagement member such as the wiper holder 33 can be provided at the standby position. It is possible to prevent the positioning from becoming impossible.

  In addition, by improving the control accuracy of the wiper movement range, problems such as hindering the movement of the wiper, unable to clean the necessary range of the UV transmission tube, and suppressing the decrease in the UV irradiation amount can be caused. The reliability of the wiping mechanism and the ultraviolet irradiation device can be improved.

  Furthermore, in the ultraviolet irradiation apparatus provided with the wiping mechanism 5 and the wiping mechanism 5 of this embodiment, the rotating shaft 31 and the reduction motor 29 are provided as moving means. The wiper holder 33 serving as an engaging member has a nut portion 33 a that includes a nut 45 having a through hole 45 a that is screwed into the rotating shaft 31. In addition, a rotational speed detection disk 39, a rotational speed detection switch 61, and a rotational speed detection means such as a rotational speed counter included in a control unit in the control panel 11 are provided. The control unit in the control panel 11 that controls the movement range of the wiper holder 33 controls the movement range of the wiper holder 33 and the wiper 27 based on the rotation speed detected by the rotation speed counter of the rotation speed detection means, and also detects the magnetic detection. The switch 57 detects the magnetism of the magnet 55 to position the wiper holder 33 at the standby position. Accordingly, the wiper holder 33 is positioned at the standby position by the magnetic detection switch 57 and the magnet 55, and the rotational speed can be corrected or corrected by resetting the rotational speed count state of the rotational speed counter. It is possible to further prevent the shift of the moving range due to the above, and to further improve the control accuracy of the moving range of the wiper.

  Furthermore, in the ultraviolet irradiation apparatus provided with the wiping mechanism 5 and the wiping mechanism 5 of the present embodiment, the surface of the magnet 55 attached to the wiper holder 33 is formed of polytetrafluoroethylene, which is an organic compound having ultraviolet resistance, or the like. 55b. Thereby, even if it is a case where it uses for the ultraviolet irradiation device which irradiates a corrosive fluid etc. with ultraviolet rays, damage by corrosion etc. of a magnet can be controlled and generation | occurrence | production of malfunctions, such as a malfunction of a magnet, can be suppressed. In addition, since the corrosion of the magnet can be suppressed, an increase in the iron concentration in the fluid to be treated due to the corrosion of the magnet can be suppressed. For example, when the fluid to be treated is drinking water or the like, an increase in iron concentration in the drinking water or the like is not desirable, but in this embodiment, such an undesirable increase in iron concentration can be suppressed.

  In this embodiment, no ultraviolet lamp is inserted in the ultraviolet transmission tube 3 in which the magnetic detection switch 57 is installed, but a configuration in which the magnetic detection switch 57 is installed in the ultraviolet transmission tube 3 in which the ultraviolet lamp is inserted. Alternatively, a configuration in which the magnetic detection switch 57 is installed in a sealed container different from the ultraviolet transmission tube, or a configuration in which the magnetic detection switch 57 is installed at a predetermined position on the outer wall surface of the tank 7 can be used.

  For example, when the magnetic detection switch 57 is installed in a sealed container different from the ultraviolet ray transmission tube, instead of the ultraviolet ray transmission tube 3, as shown in FIG. It is also possible to use a cylindrical container 65 dedicated to the magnetic detection switch 57 formed of a material having ultraviolet resistance and corrosion resistance such as manufactured. At this time, a through hole is formed in an appropriate position of the top plate 15 in addition to the hole for the ultraviolet light transmitting tube 3, and the container 65 is inserted into the through hole from the outside. At the opening end of the container 65, an annular seal gland 67 having a convex longitudinal cross section is formed so that the disk portion with the larger diameter is on the opening side and the disk portion with the smaller diameter is on the closed end side. The end of the opening of the container 65 is inserted into the hole of the seal gland 67 and fixed. The through-hole drilled in the top plate 15 corresponds to the size of the disk portion with the smaller diameter of the seal gland 67.

  Therefore, the container 65 shown in FIG. 7 is inserted into a through hole formed in the top plate 15 from the outside, and is packed into a disk portion having a large seal ground 67 diameter and a portion around the through hole of the top plate 15. While the sealing member 70 is sandwiched, the tank 7 is fixed to the top plate 15 with bolts 69a and 69b while keeping the inside of the tank 7 watertight. The magnetic detection switch 57 is inserted into the container 65 from the opening of the container 65 and attached to a predetermined position using the attachment tool 71.

  The fixture 71 is a fixed portion 71a spanned in the diameter direction of the end face of the seal ground 67 in an opening located outside the tank 7 of the seal ground 67 attached to the container 65 in which the magnetic detection switch 57 is installed. It has a mounting bar portion 71b that is inserted into the container 65 from the fixing portion 71a and to which the magnetic detection switch 57 is attached. The fixing portion 71 a of the fixture 71 is fixed to the outer end surface of the seal ground 67 using one bolt 69 a of the seal ground 67. A magnetic detection switch 57 is attached to the attachment rod portion 71b with a screw 71c. If an ultraviolet ray transmitting tube for installing an ultraviolet lamp is used as a container for installing the magnetic detection switch 57, the magnetic detection switch 57 is installed compared to the case of using a container 65 for installing the magnetic detection switch 57 separately. Generation of new parts and the like can be suppressed, and an increase in cost can be suppressed.

  Moreover, in this embodiment, the control part of the control panel 11 has a timer, and illustrated the case where the wiping mechanism 5 is operated at a set time interval. However, the wiping mechanism is not limited to the timer, and can be operated under various conditions, for example, according to the illuminance of ultraviolet rays. When operating in accordance with the illuminance of ultraviolet rays, in order to detect the illuminance of ultraviolet rays, in the ultraviolet irradiation device having the configuration as in this embodiment, for example, as shown in FIG. 8, an ultraviolet lamp 1 provided with a magnetic detection switch 57 is installed. An ultraviolet sensor 73 is installed on the bottom side of the ultraviolet transmission tube 3 where no sensor is installed.

  As shown in FIG. 9, the ultraviolet sensor 73 includes a wavelength conversion unit 73a in which a wavelength conversion element 75 having a rod-like tip is inserted into a cylindrical ultraviolet transmission tube 77, and an optical fiber 79 connected to the wavelength conversion unit 73a. And a coupler 73c that optically couples the wavelength converter 73a and the light transmitter 73b. At the end portion of the light transmitting portion 73b, a fixing is carried over the end surface of the seal gland 13 attached to the lower side of the ultraviolet transmission tube 3 on the outer side of the tank 7 in the diameter direction of the end surface of the seal gland 13. It has a portion 73d. The fixing portion 73d is fixed to the end portion of the seal gland 13 with a screw 73e using the outer peripheral surface of the seal gland 13 in the same manner as the fixing portion 59a of the fixture 59. The optical fiber 79 from the ultraviolet sensor 73 is optically connected to the control unit in the control panel 11.

  The ultraviolet sensor 73 converts the ultraviolet light by the wavelength conversion element 75 into visible light corresponding to the illuminance of the ultraviolet light, and the control unit in the control panel 11 is based on the intensity of the visible light converted by the ultraviolet sensor 73. Detects the illuminance of ultraviolet rays. And the control part in the control panel 11 will operate the wiping mechanism 5, if the illumination intensity of an ultraviolet-ray becomes below below the preset illumination intensity or a required level. Further, when the ultraviolet sensor is provided, the reciprocating movement of the wiper 27 of the wiping mechanism 5 can be repeated until the illuminance is higher than a preset illuminance or the ultraviolet illuminance reaches a required level.

  In the present embodiment, one magnet 55 is attached to the magnet holder 53 of the wiper holder 33. However, a plurality of magnets can be provided. When a plurality of magnets are provided, for example, as shown in FIG. 10, a rectangular pedestal portion 83a corresponding to the upper surface of the engaging portion 33b and a plurality of circles on the pedestal portion 83a are provided on the upper surface of the engaging portion 33b of the wiper holder 33. A magnet holder 83 having a configuration including a cylindrical portion 83b having an annular space in which a columnar magnet 85 is accommodated can be used. In the magnet holder 83, the inner diameter of the cylindrical portion 83b is such that the ultraviolet transmissive tube 3 can be inserted, and a hole is formed in the pedestal portion 83a at a position corresponding to the hole of the cylindrical portion 83b. The magnets 85 are included in the cylindrical portion 83 b and are arranged in an annular shape around the ultraviolet transmission tube 3. In addition, screw holes for attaching the magnet holder 83 to the engaging portion 33b of the wiper holder 33 are formed at the four corners of the pedestal portion 83a. If a plurality of magnets 85 are arranged around the ultraviolet transmissive tube 3 such as the magnet holder 83, the magnetic force becomes stronger and the magnetic detection ability can be improved.

  In the present embodiment, a configuration is shown in which the rotational speed detection disk 39, the rotational speed detection switch 61, and the like are provided as the rotational speed detection means. However, as the rotational speed detection means, for example, from a rotational speed detection disk provided with a position detection pattern, a light emitting device such as a light emitting diode, a light reflected from the rotational speed detection disk or passed through the rotational speed detection disk. Various configurations can be used as long as the rotational speed of the rotating shaft and the electric motor can be detected, such as a configuration using a light receiver that receives the light.

  In the present embodiment, the case where two ultraviolet transmissive tubes 3 are installed in parallel is illustrated, but the number of the ultraviolet transmissive tubes 3 can be selected as appropriate. In the present embodiment, the vertical ultraviolet irradiation device is exemplified, but the wiping mechanism of the present invention can also be applied to a horizontal ultraviolet irradiation device and the like.

  Further, the present invention is not limited to the ultraviolet irradiation device having the configuration as in the present embodiment, but can be applied to various configurations of the ultraviolet irradiation device used for various purposes of irradiating the ultraviolet ray of the fluid to be processed. It can be applied to a wiping mechanism for an ultraviolet irradiation device.

It is a figure which shows schematic structure of one Embodiment of the ultraviolet irradiation apparatus provided with the wiping mechanism to which this invention is applied, The state which fractured | ruptured the part which provided the magnetic detection switch of the tank in the cross section It is a front view shown by. It is a figure which expands and shows the outline structure of one embodiment of the ultraviolet irradiation device provided with the wiping mechanism to which the present invention is applied, the peripheral portion of the standby position of the wiper, the tank in cross section, and the magnetism of the ultraviolet transmission tube It is a front view shown in the state where a portion provided with a detection switch was broken. It is a figure which shows schematic structure of the wiper holder and wiper of one Embodiment of the wiping mechanism to which this invention is applied, and is a top view which shows the state which removed the raising / lowering nut pressing plate. It is sectional drawing which shows the structure of the magnet of one Embodiment of the wiping mechanism formed by applying this invention. It is a figure which shows an example of the attachment structure of the magnetic detection switch of one Embodiment of the wiping mechanism to which this invention is applied, (a) is a top view, (b) is the figure which showed the ultraviolet-ray transmission tube etc. in the cross section. is there. It is a top view which shows the structure of the rotation speed detection disk of one Embodiment of the wiping mechanism formed by applying this invention. It is the front view which showed the example of the attachment structure of the magnetic detection switch in another embodiment of the wiping mechanism to which this invention is applied, and an example of a container in the cross section of the tank and the container. It is a figure which shows schematic structure of another embodiment of the ultraviolet irradiation apparatus provided with the wiping mechanism to which this invention is applied, a tank is a cross section, and the part which provided the magnetic detection switch of the ultraviolet permeable tube, and an ultraviolet sensor It is a front view which shows the state which fractured | ruptured the part which provided. It is sectional drawing which shows schematic structure of the ultraviolet sensor used for another embodiment of the wiping mechanism to which this invention is applied. It is a figure which shows an example of schematic structure of the magnet holder of another embodiment of the wiping mechanism which applies this invention, (a) is a top view, (b) is an arrow line view from a Xb-Xb line | wire. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ultraviolet lamp 3 Ultraviolet transmission tube 5 Wiping mechanism 7 Tank 9 Support frame 11 Control panel 27 Wiper 29 Deceleration motor 31 Rotating shaft 33 Wiper holder 39 Rotation speed detection disk 55 Magnet 57 Magnetic detection switch 61 Rotation speed detection switch

Claims (4)

An annular wiper that is slidably mounted on the outer surface of an ultraviolet transmission tube in which an ultraviolet lamp is inserted, an engagement member that engages with the wiper and moves in the extending direction of the ultraviolet transmission tube, and the engagement member Moving means for moving the UV transmission tube in the extending direction, a magnet attached to the engagement member, and a magnetic detection means for detecting the magnetism of the magnet when the engagement member is located at the standby position And a control means for controlling a moving range of the engaging member by the moving means, the control means positioning the engaging member at a standby position by detecting the magnetism of the magnet by the magnetic detecting means. A wiping mechanism for an ultraviolet irradiation device. The moving means includes a rotating shaft that is threaded on an outer peripheral surface and is installed in parallel with the ultraviolet ray transmitting tube, and an electric motor that is connected to one end of the rotating shaft and rotates the rotating shaft, and the engagement The member has a through hole in which a screw corresponding to the screw cut on the outer peripheral surface of the rotating shaft is cut on the inner peripheral surface and screwed into the rotating shaft, and the member detects the rotation number of the rotating shaft. Number detecting means, and the control means controls the moving range of the engaging member based on the number of revolutions detected by the number of revolutions detecting means, and the magnetism detecting means detects the magnetism of the magnet. The wiping mechanism according to claim 1, wherein the engaging member is positioned at a standby position. The wiping mechanism according to claim 1 or 2, wherein the surface of the magnet is coated with an organic compound having ultraviolet resistance. An ultraviolet transmissive tube capable of transmitting ultraviolet light into which an ultraviolet lamp is inserted, and a wiping mechanism for wiping the outer surface of the ultraviolet transmissive tube to remove deposits on the outer surface of the ultraviolet transmissive tube, and as the wiping mechanism. An ultraviolet irradiation device comprising the wiping mechanism according to any one of 1 to 3.

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