JP2010162440A - Damage detector of lamp sleeve for uv ray disinfection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the damage detector of a lamp sleeve for a UV ray disinfection apparatus which can surely and quickly detect damage in the lamp sleeve. <P>SOLUTION: The damage detector has a vessel 2 where conductive fluid to be treated flows in, a UV ray lamp 3 which irradiates the fluid to be treated flowing in the vessel with UV rays, the light translucent lamp sleeve 4 where the UV ray amp is housed and electric conduction parts 8, 8a, 8b in the lamp sleeve. Further the damage detector has a plurality of conduction wires 7 the parts of which except for the electric conduction parts are insulated in the lamp sleeve and an electric conduction detection means 9 which detects electric change flowing in the conduction wires when the fluid to be treated permeated into the lamp sleeve comes into contact with at least one of the electric conduction parts and which reports the damage in the lamp sleeve on the basis of the signal of the detected electric change. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention irradiates treated water with ultraviolet rays in order to inactivate or detoxify algae, microorganisms, pathogenic protozoa, etc. in water purification treatment, sewage treatment, food wastewater treatment, chemical wastewater treatment, pelagic ship ballast water treatment, etc. The present invention relates to a lamp sleeve damage detecting device for detecting damage to a lamp sleeve used in an ultraviolet disinfecting device.

  Ultraviolet disinfection has been applied for the purpose of disinfecting and disinfecting pathogenic microorganisms, bacteria, and viruses in water treatment in general, such as water and sewage treatment, sterilization treatment of pools, water treatment in the food industry, and the like.

  In particular, water purification is a highly effective disinfection method as a countermeasure against the chlorine-resistant pathogens Cryptosporidium and Giardia, which cannot be inactivated by chlorine disinfection, which is a conventional disinfection technique, and is an expected disinfection technique. For example, Non-Patent Document 1 describes that inactivation of Cryptosporidium and Giardia of 2 logs or more is irradiation with ultraviolet rays of 10 mJ / cm 2 or less. In Japan, the Ministry of Health, Labor and Welfare notified the “Guidelines for Cryptosporidium Measures in Tap Water” in March 2007, and the introduction of UV treatment equipment was approved in facilities that use raw water other than surface water. Along with this, the number of UV treatment facilities introduced is increasing.

  The ultraviolet disinfection performance depends on the product of the intensity of ultraviolet light and the irradiation time (the amount of ultraviolet light). In other words, the flow of water to be treated inside the ultraviolet disinfection tank greatly affects the disinfection performance. For example, Patent Document 1 deals with an ultraviolet irradiation processing apparatus that allows a fluid to flow in a direction perpendicular to the longitudinal direction of an ultraviolet transmission tube by providing a fin-like or flat plate rectifying mechanism having a small thickness downstream of the ultraviolet transmission tube. ing.

  Moreover, in patent document 2, it respond | corresponds by installing an ultraviolet lamp so as to be orthogonal to the flow of the fluid to be sterilized.

  In an ultraviolet disinfection apparatus in which an ultraviolet irradiation target is a liquid typified by water, the ultraviolet light source is generally an ultraviolet lamp. Inserting the UV lamp directly into the water causes the electrodes to short-circuit, so insert the UV lamp inside a protective glass tube called a lamp sleeve and immerse the UV lamp in the treated water to be irradiated together with the lamp sleeve. It has a structure to do. As a material for the lamp sleeve, quartz glass having a high ultraviolet transmittance is used.

  On the other hand, the lamp sleeve may be damaged such as cracking or chipping due to collision of foreign matters mixed in the water to be treated, rapid change in flow, malfunction of an internal driving unit such as a cleaning device, and the like. If the lamp sleeve is damaged, the broken glass pieces will flow out or the mercury lamp will flow out due to the secondary UV lamp breakage, which will have a large impact on the entire system, so the lamp sleeve will be detected quickly. It is requested to do.

  However, there is currently no suitable method for detecting damage to the lamp sleeve. As an example, Patent Document 3 adopts a method of detecting damage from a pressure change inside the lamp sleeve by a pressure sensor. In this case, it is difficult to detect unless rapid damage such as a change in pressure occurs.

JP 09-276859 A JP 2001-029941 A JP 2004-223502 A

Journal of the Water Works Association (June 2004) Vol. 73, No. 6, p. 60

  When the lamp sleeve breaks, the water to be treated suddenly enters the lamp sleeve, and the water directly hits the ultraviolet lamp that is lit. As a result, there is a risk of the lamp heated to a high temperature bursting, or leakage of the electrode part or short circuit. Also, even if the lamp sleeve is damaged such as a crack that does not break apart, water gradually enters the inside of the lamp sleeve, and there is a risk of leakage of the electrode part and short circuit.

  There is a demand from the user to develop an apparatus that can reliably detect damage to the lamp sleeve and can detect slight damage such as cracks.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lamp sleeve damage detection apparatus for an ultraviolet disinfection apparatus that can reliably and quickly detect damage to the lamp sleeve.

  The apparatus for detecting damage to a lamp sleeve for an ultraviolet disinfection apparatus according to the present invention includes a container into which a conductive fluid to be treated flows, an ultraviolet lamp for irradiating ultraviolet rays to the fluid to be treated flowing through the container, and the ultraviolet lamp. A plurality of conductive wires each having a light-transmitting lamp sleeve in which is stored, and a conductive portion that is electrically conductive in the lamp sleeve, and other portions in the lamp sleeve other than the conductive portion are insulated. And an electrical change flowing in the conductor when the fluid to be processed that has entered the lamp sleeve contacts at least one of the conductive parts, and the lamp is based on the detected electrical change signal. And a conductive detection means for notifying damage of the sleeve.

  According to the present invention, when the water to be treated enters the lamp sleeve from the damaged portion, a certain amount of water is accumulated, and one of the conductive portions is in contact with the liquid, the two conductive wires are electrically connected to each other. A potential difference is generated between them, and the generated potential difference is detected by the conductivity detecting means. Based on this, the conductivity detecting means can quickly and surely notify that a lamp sleeve breakage accident has occurred. In particular, in the lamp sleeve for an ultraviolet disinfection device, water flows into a narrow space between the lamp sleeve and the ultraviolet lamp, and the water level rises in a short time. According to the present invention, the water level rises as quickly as possible. Can be detected.

The internal perspective schematic diagram which shows an example of an ultraviolet disinfection apparatus. 1 is a block cross-sectional view showing a damage detection device for a lamp sleeve for an ultraviolet disinfection device according to a first embodiment of the present invention. The block sectional view for explaining the operation of damage detection at the time of lamp sleeve damage. The expanded sectional view which shows the principal part of the damage detection apparatus of the lamp sleeve for ultraviolet disinfection apparatuses which concerns on 2nd Embodiment. The perspective view which shows the hollow-shaped insulating cap for insulatingly coating the electroconductive part of the front-end | tip part of conducting wire. The block sectional view showing the damage detection device of the lamp sleeve for ultraviolet disinfection devices concerning a 3rd embodiment. The block sectional view showing the damage detection device of the lamp sleeve for ultraviolet disinfection devices concerning a 4th embodiment. The block sectional view showing the damage detection device of the lamp sleeve for ultraviolet disinfection devices concerning a 5th embodiment. The block sectional view showing the damage detection device of the lamp sleeve for ultraviolet disinfection devices concerning a 6th embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  A damage detection device for a lamp sleeve for an ultraviolet disinfection device according to the present invention comprises a container into which a conductive fluid to be treated flows, an ultraviolet lamp for irradiating ultraviolet rays to the fluid to be treated flowing in the container, and the ultraviolet lamp. A light-transmitting lamp sleeve that is housed, and a plurality of conductive wires each having a conductive portion that can be electrically conducted in the lamp sleeve, and other portions in the lamp sleeve other than the conductive portion are insulated. Detecting an electrical change flowing in the conductor when a fluid to be processed that has entered the lamp sleeve contacts at least one of the conductive parts, and based on the detected electrical change signal, the lamp sleeve And a conductive detection means for informing the damage of the battery.

  In the apparatus of the present invention, the lamp sleeve 4 is damaged by a collision of a foreign substance or a water hammer (water hammer), and the water to be treated enters the inside of the lamp sleeve 4 from the damaged portion 10, and the lamp When a certain amount of water accumulates in the sleeve 4 and at least one conductive portion 8b comes into contact with the accumulated water 11 (FIG. 3), the two conductors 7 and 7 are conducted through the wetted portion, Due to this conduction, a weak current flows between the two conductors 7 and 7, which is detected by the conductivity detecting means 9, and based on this, the conductivity detecting means 9 causes a breakage failure in the lamp sleeve for maintenance personnel etc. Notify that A maintenance person who knows that the lamp sleeve 4 has been damaged immediately stops the operation of the system, opens the container cover and the lamp cap, etc., inspects the lamp sleeve 4 and the ultraviolet lamp 3 in the container 2, and damages the lamp sleeve. The UV lamp can be removed and replaced with a new one.

  In the present invention, the conductivity detecting means preferably has a detection circuit connected to a DC power source (this circuit is connected to a plurality of conductive parts). Specifically, as shown in FIG. 3 or the like, a conductive level switch using a water level detection method by detecting a weak current flowing between two electrode rods can be used as the conductive detection means 9. Since such a conductive level switch immediately receives a detection signal as soon as one of the conductive portions 8b comes into contact with the liquid, the damage 10 of the lamp sleeve is quickly detected, and this is immediately maintained by the notification means of the conductivity detection means 9. Inform personnel. Maintenance personnel who know that the lamp sleeve has been damaged can take immediate action to repair it.

  In the present invention, it is preferable to arrange a plurality of conductors along a gap formed between the lamp sleeve and the ultraviolet lamp (FIGS. 2, 4, 6, 7, and 8). Since this gap is as narrow as several millimeters, it cannot be inserted unless it is a thin conductor. For this reason, it is necessary to make the outer diameter of the conducting wire 2.0 mm or less in the state of being covered with insulation. If the outer diameter of the insulation coated conductor is reduced, it will be easier to insert into the narrow space inside the lamp sleeve, but on the other hand, the rigidity of the conductor will decrease, making it easier for the conductor to bend against the peripheral wall, making it difficult to insert and the desired location. It may be difficult to place in Also, if the diameter of the conducting wire is reduced, it becomes easier to break due to radiant heat received from the ultraviolet lamp (for example, a small medium pressure lamp with high irradiation intensity is heated to 200 ° C. or higher, up to about 900 ° C.), For example, in the case of a Cu conductor, the diameter of the uncovered bare wire is preferably 0.8 mm or more.

  In the present invention, each of the plurality of conductors is covered with an insulation coating, and the conductive portion is an exposed portion from which the insulation of the insulation-coated conductor is removed, and the exposed portions are exposed in the length direction of the leads so as not to contact each other. A plurality of conductors can be arranged by shifting the positions of the parts (FIGS. 2, 4, 6, 7, and 8). Since the conductive level switch detects the potential difference between the two electrodes and measures the liquid level, it is necessary to change the position where each of the conductive parts come into contact with the liquid in the lamp sleeve, and the conductive level switch is disposed in proximity. This is because it is necessary to avoid mutual contact between the conductive parts to prevent a short circuit between the conductors.

In the present invention, since the conductive wire is disposed in the vicinity of the ultraviolet lamp, it is desirable to use a material having heat resistance, ultraviolet resistance, and water resistance for the insulation coating of the conductive wire. As such an insulating material, a fluorine-based resin such as polytetrafluoroethylene (PTFE) or tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) is used, or alumina (Al ₂ O ₃ ) or silicon carbide ( Ceramics such as (SiC) can be used.

In the present invention, a hollow insulating cap 12 that covers a part of the conductive portion can be further provided (FIG. 4). Similarly, use a fluororesin such as polytetrafluoroethylene (PTFE) or tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) for the insulating cap, or alumina (Al ₂ O ₃ ) or silicon carbide. Ceramics such as (SiC) can be used. By attaching such an insulating cap to the conductive part and covering the conductive part, it is possible to prevent contact between the conductive parts arranged close to each other.

  In the present invention, when the lamp sleeve has a closed end with one end closed and an open end with the other end open, the closed end is positioned lower than the open end. It is preferable that the conductive portions 8a and 8b are disposed in the vicinity of the closed end (FIGS. 2, 4, and 6). This is because water that has entered from the damaged portion tends to accumulate at the closed end of the lamp sleeve, and if the conductive portion is disposed here, damage to the lamp sleeve can be easily detected.

  In the present invention, when the lamp sleeve has a closed end whose one end is closed and an open end whose other end is open, the plurality of insulation-coated wires are connected from the open end to the closed end. Preferably, the lamp sleeve has at least one conductive portion at an intermediate portion other than the tip in the lamp sleeve (FIG. 6). Even in a situation where water is not collected due to gravity, such as a horizontally installed lamp sleeve, the damaged portion of the lamp sleeve can be detected early and reliably by the conductive portion of the intermediate portion.

  In the present invention, when the lamp sleeve has an open end whose one end is open, the lamp sleeve is installed so that the open end is positioned below in a state of being covered with a cap, and is exposed at the tip of the conductor. It is preferable that the tips of the plurality of conducting wires are inserted into the lamp sleeve from the opening end so that the conductive portion is positioned in the vicinity of the opening end (FIG. 7). Water that enters the damaged lamp sleeve accumulates at the lower open end of the cap, so it is only necessary to place the insulated wire near the lower open end without passing through the entire length of the lamp sleeve. Therefore, there is an advantage that the installation work of the conducting wire is simplified.

  In the present invention, an ultraviolet lamp having a surface temperature of 200 ° C. or higher is used as the ultraviolet lamp, the lamp sleeve has an open end that is open at both ends, the lamp sleeve is installed substantially horizontally, It is preferable that a plurality of insulated wires are inserted into the lamp sleeve from each of the open ends so that the exposed conductive portions are positioned in the vicinity of the open ends (FIG. 8). When using an ultraviolet lamp with a lamp surface temperature of 200 ° C. or higher, the insulation coating conductor is installed only in the vicinity of the open ends on both sides of the sleeve, thereby reducing the amount of ultraviolet radiation received by the insulation coating conductor. It is possible to reduce and delay the progress of thermal degradation of the covering insulating material.

  In the present invention, it is preferable that the lamp sleeve has at least two conductors in which a conductor is embedded in a sleeve wall constituting the lamp sleeve and at least one conductive portion is exposed on the inner wall surface of the lamp sleeve. (FIG. 9). In this way, there is no problem of thermal deterioration of the covering insulating material, and the conductors can be reliably insulated from each other, so that damage to the lamp sleeve can be detected stably over a long period of time.

  Next, various embodiments for carrying out the present invention will be described with reference to the drawings.

  First, a damage detection apparatus for a lamp sleeve for an ultraviolet disinfection apparatus according to a first embodiment of the present invention will be described with reference to FIGS. The ultraviolet disinfection device is a part of a water and sewage treatment system. Water to be treated is introduced into an upright processing container 20 from an inlet tube 22, and ultraviolet light is emitted from a plurality of lamps 3 in the container 20. Is sterilized and sterilized, and the sterilized treated water is discharged from the outlet pipe 23. The ultraviolet lamp 3 of the present embodiment is installed in a posture in which the longitudinal axis is vertical.

  In the present embodiment, a quartz tube having electrodes attached to both ends is used as the ultraviolet lamp 3. The inside of the quartz tube is almost in a vacuum state, and mercury vapor is present. When high voltage discharge is performed between both electrodes of the quartz tube in such a state, electrons excite mercury vapor to emit ultraviolet rays. In the present invention, the ultraviolet lamp 3 may be a normal output type general-purpose low-pressure mercury lamp, or a high-output type low-pressure mercury lamp or medium-pressure mercury lamp. In this embodiment, the surface of the lamp is used. A high-output type low-pressure mercury lamp with a temperature of 100 to 200 ° C. was used. By exposing the water to be treated to ultraviolet rays having a predetermined wavelength emitted from the ultraviolet lamp 3, chlorine-resistant pathogens such as Cryptosporidium and Giardia that cannot be inactivated by chlorine disinfection in the water to be treated are rendered harmless. . The ultraviolet lamp 3 has a diameter (outer diameter) of about 2 to 10 cm and a length of about 40 to 150 cm.

  The ultraviolet lamp 3 is accommodated in a lamp sleeve 4 made of a light transmissive material such as quartz glass. A buffer spring (not shown) is attached to the lower closed end of the lamp sleeve 4 so that the impact energy transmitted to the ultraviolet lamp 3 is absorbed and relaxed when the lamp is mounted.

  The lamp sleeve 4 protects the ultraviolet lamp 3 in order to prevent the water to be treated from coming into direct contact with the ultraviolet lamp 3. Therefore, the lamp sleeve 4 is installed so as to surround and cover the periphery of each ultraviolet lamp 3. Both ends of each lamp sleeve 4 are attached to and supported by the upper and lower end surfaces of the container 2. The lamp sleeve 4 has a lower end closed and an upper end opened. A cover or cap (not shown) is put on the open end of the upper portion of the lamp sleeve 4. When replacing the lamp, open the cover or cap, take out the deteriorated lamp from the lamp sleeve, and install a new lamp at a predetermined position in the lamp sleeve.

  In the present embodiment, the ultraviolet lamp 3 and the lamp sleeve 4 are in a one-to-one correspondence, and the single ultraviolet lamp 3 is accommodated in one lamp sleeve 4 to individually protect the lamp 3. However, the present invention is not limited to this, and a plurality of ultraviolet lamps 3 can be accommodated in one lamp sleeve 4.

  As shown in FIG. 2, the lamp sleeve damage detection apparatus of the present embodiment includes two conductors 7 with insulation coating (0.3 mm thick PTFE coating on φ1.2 mm Cu wire) and the tip of each conductor 7. Conductive portions 8a and 8b from which the insulation of the conductor is removed by removing the covering insulation and a conductive level switch 9 having a detection circuit to which the two conductors 7 are connected are included. In this embodiment, as the conductive level switch 9, for example, either a floatless switch having an open collector type detection circuit or a floatless switch having a relay output type detection circuit can be used.

  The two insulated conductors 7 are installed in a narrow gap of only a few millimeters between the lamp sleeve 4 and the ultraviolet lamp 3. These conductive wires 7 are inserted into the gap from the open end of the upper portion of the sleeve so that the conductive portions 8a and 8b are positioned in the vicinity of the closed end of the lower portion of the sleeve. The two conductive portions 8a and 8b are arranged so that their positions are shifted by several millimeters to several tens of millimeters in the longitudinal direction (vertical direction) of the sleeve, and one conductive portion 8b is positioned below the other conductive portion 8a. Has been. By adopting such a shift arrangement structure of the conductive portions 8a and 8b, the conductive portions 8a and 8b are not in contact with each other even when the two conductors 7 and 7 intersect and contact each other. , So that no false positives occur.

  Next, the operation of this embodiment will be described.

  The treated water that has flowed into the container 2 flows in the vicinity of the ultraviolet lamp disposed in the center of the container. At this time, the water to be treated is irradiated with ultraviolet light having a wavelength of about 254 nm from the lamp. Ultraviolet rays having a wavelength of around 254 nm act as sterilizing lines and inactivate chlorine-resistant microorganisms such as Cryptosporidium and other microorganisms such as Escherichia coli, viruses, and algae in the water to be treated. The treated water sterilized by the ultraviolet rays passes through the outlet pipe 6 and is discharged from the container 2 as treated water.

  In order to detect damage to the lamp sleeve, a weak voltage is applied to the conductor 7 by the non-float switch 9, but usually the two conductive wires 8 a and 8 b are separated from each other and are not in contact with each other. No current flows between 7.

  By the way, as shown in FIG. 3, the lamp sleeve 4 is damaged by a collision of foreign matter or a water hammer (water hammer), and the water to be treated flows into the lamp sleeve 4 from the damaged portion 10. It collects at the closed end (closed bottom) of the sleeve 4. When a certain amount of water accumulates inside the lamp sleeve 4 and the water level rises, one conductive portion 8b comes into contact with the accumulated water 11, and the two conductors 7 and 7 conduct through the wetted portion. This conduction causes a current to flow between the two conductors 7 and 7. The non-float switch 9 detects this current, and based on this, an alarm signal for lamp sleeve damage is output to a notifying means (not shown). The notification means notifies the maintenance staff or the like that the lamp sleeve is damaged according to the input signal. Maintenance personnel who knew that the lamp sleeve 4 was damaged immediately stopped the operation of the water treatment system, opened the container cover and lamp cap, etc., inspected the lamp sleeve 4 and the ultraviolet lamp 3 in the container 2 and damaged them. The lamp sleeve and UV lamp can be removed and replaced with a new one.

  In the present invention, as the notification means attached to the conductivity detection means (non-float switch), various indicators such as a blinking lamp, a lighting lamp, an indication of occurrence of an emergency on the screen of the display device, an audio announcement, an alarm such as a buzzer or a siren, etc. These means can be used alone or in combination of two or more.

  According to the present embodiment, when the lamp sleeve is damaged, water flowing into the lamp sleeve is detected quickly and reliably, so that damage to the lamp sleeve can be detected at an early stage. In particular, even when the damage to the lamp sleeve is very slight, such as a crack, it is possible to detect the water that flows in a small amount and detect it early before the ultraviolet lamp leaks or shorts. Thereby, the damage accident of an ultraviolet lamp can be prevented beforehand.

  Next, the apparatus of the second embodiment will be described with reference to FIGS. In addition, in this embodiment, description of the part which overlaps with said embodiment is abbreviate | omitted.

  FIG. 4 is an enlarged internal perspective view showing the closed end of the lower portion of the lamp sleeve 4. In the damage detection apparatus 1 </ b> A of the present embodiment, the conductive portions 8 a and 8 b provided at the tip of the conducting wire 7 are covered with the insulating cap 12. FIG. 5 is an enlarged view of the hollow insulating cap 12. The shape of the insulating cap 12 is hollow. When each of the conductive portions 8a and 8b is inserted into the hollow portion 12a and the outer periphery of the conductive portions 8a and 8b is insulated, the conductive portions 8a and 8b are directly connected to each other even when the conductors 7 and 7 are in contact with each other. No longer touches. In addition, since the shape of the insulating cap 12 is hollow, the tips (lower ends) of the conductive portions 8a and 8b exposed to the hollow portion 12a can come into contact with the liquid, and the detection operation is not hindered.

For the insulating cap 12, it is desirable to use a material having properties of insulation, heat resistance and ultraviolet resistance such as ceramic. Specifically, a ceramic material such as alumina (Al ₂ O ₃ ) or silicon carbide (SiC) is used as the insulating cap, or polytetrafluoroethylene (PTFE) or tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer. A fluorine resin such as coalescence (PFA) can be used. In this embodiment, an insulating cap 12 made of alumina (Al ₂ O ₃ ) is used.

  According to this embodiment, malfunctioning due to contact between the conductive portions can be prevented by insulatingly covering the conductive portions with the hollow insulating cap. As a result, the accuracy of the lamp sleeve damage detection can be increased.

  Next, the apparatus of the third embodiment will be described with reference to FIG. In addition, in this embodiment, description of the part which overlaps with said embodiment is abbreviate | omitted.

  The damage detection apparatus 1B of the present embodiment is a horizontal apparatus in which the ultraviolet lamp 3 and the lamp sleeve 4 are installed horizontally. Two conducting wires 7 are inserted from the open end of the sleeve 4, and the conductive portion 8 at the tip thereof reaches the vicinity of the closed end. These conducting wires 7 are inserted in the gap between the ultraviolet lamp 3 and the lamp sleeve 4 and are provided along the length of the sleeve from the open end to the closed end of the sleeve. The conducting wire 7 is disposed in a lower space in the sleeve 4.

  Each conductor 7 is generally covered and insulated with an insulating material such as a fluororesin as a whole, and the insulation coating is partially removed at a plurality of appropriate positions, and the conductive portion 8 is provided not only at the tip portion but also at the intermediate portion. is there. That is, as shown in FIG. 6, each conductor 7 has one conductive portion 8 at the tip portion and three conductive portions 8 in the middle portion, each having a total of four conductive portions. 8 is provided. The three conductive portions 8 in the intermediate portion are formed at a substantially equal pitch interval on the conductive wire 7 and have a shift arrangement structure in which the positions are shifted in the longitudinal direction so as not to contact each other with the conductive portion 8 of the other adjacent conductive wire. ing.

  In the present embodiment, the case of a lamp sleeve having a closed end with one end closed and an open end with the other end opened has been described, but the present invention is not limited to this, The same can be applied to a lamp sleeve having open ends at both ends.

  According to this embodiment, in the lamp sleeve installed horizontally, it is possible to detect a case where water has flowed in at each location using two conductive wires each having four conductive portions. By having one or more conductive portions in the lamp sleeve, the inflow of water due to damage to the lamp sleeve can be detected at a plurality of locations. As a result, even when the lamp sleeve is installed horizontally and water is not collected due to gravity, damage to the lamp sleeve can be detected early and reliably.

  Next, an apparatus according to a fourth embodiment will be described with reference to FIG. In addition, in this embodiment, description of the part which overlaps with said embodiment is abbreviate | omitted.

  The damage detection apparatus 1C of the present embodiment is a vertical apparatus in which the ultraviolet lamp 3 and the lamp sleeve 4 are installed vertically. In the present embodiment, the opening end of the lamp sleeve 4 is arranged at the lower part, and the conductive portion 8 of the conductor 7 is inserted into the lamp sleeve 4 from the lower opening end. A cap 13 is put on the lower opening end of the lamp sleeve 4.

  The lamp sleeve cap 13 has a role of supporting the ultraviolet lamp 3 at the lower part, a role of not letting out ultraviolet rays to the outside, and a role of suppressing the accumulated water so that water does not flow out at a time when the lamp sleeve 4 is broken. . Therefore, when the lamp sleeve 4 is damaged, water accumulates inside the lamp sleeve cap 13 (inside the lamp sleeve), and the two conductive portions 8 are electrically connected, so that the lamp sleeve can be detected quickly. be able to.

  In the present embodiment, the insulating coating that covers the conductive wire is not necessarily a material having heat resistance and ultraviolet resistance. This is because the conducting wire 7 can be installed avoiding the light emitting portion of the ultraviolet lamp 3, and the insertion length of the conducting wire inserted into the lamp sleeve is extremely short. In this embodiment, ethylene propylene rubber (EPDM) is used as the insulating material for covering the conductive wires.

  In the present embodiment, the case of a lamp sleeve having a closed end with one end closed and an open end with the other end opened has been described, but the present invention is not limited to this, The same can be applied to a lamp sleeve having open ends at both ends.

  According to the present embodiment, in the lamp sleeve installed vertically or at an angle from the vertical so that the opening end is the lower part, the water flowing into the lamp sleeve when the lamp sleeve is damaged is the lower part closed by the cap. Since water is collected at the opening end, the conductor covered with the insulating coating can be easily installed in the vicinity of the lower opening end without passing it through the lamp sleeve. Further, since the place where the conducting wire is installed is not a place where the ultraviolet rays from the lamp are directly irradiated, the insulating coating does not necessarily need to be made of a heat resistant and ultraviolet resistant material. Further, by attaching a lamp sleeve cap to the lower opening end, water flowing in when the lamp sleeve is damaged collects water, and early detection can be realized.

  Next, an apparatus according to a fifth embodiment will be described with reference to FIG. In addition, in this embodiment, description of the part which overlaps with said embodiment is abbreviate | omitted.

The damage detection apparatus 1D of the present embodiment is a horizontal apparatus in which the ultraviolet lamp 3 that has a high surface temperature of 200 ° C. or more when horizontally emitting ultraviolet light is horizontally installed. A set of two conducting wires 7 are inserted from the opening ends on both sides of the lamp sleeve 4, and the conductive portions 8 at the tips thereof are arranged in the vicinity of the opening ends. As a high-temperature ultraviolet lamp having a temperature of 200 ° C. or higher, a small-sized and high-output medium-pressure lamp is typical. The medium pressure lamp has a high surface temperature of 600 to 900 ° C. when emitting ultraviolet light. In addition, the intensity of ultraviolet rays is strong. Accordingly, the insulation material for the conductor 7 must have particularly high heat resistance and ultraviolet resistance, but it is very difficult to obtain an insulation material that can withstand it. On the other hand, in the case of an intermediate pressure lamp, it is difficult for the above reason to arrange the conductor 7 from the electrode on one side to the other side through the vicinity of the lamp surface. A ramp sleeve at the open end is used. In view of this, damage to the lamp sleeve is detected by installing two conductors 7 in the vicinity of the open ends at both ends without passing the conductor 7 from one end to the other end in the lamp sleeve 4. In this embodiment, the covering insulating material of the conductive wire 7 does not necessarily need to be a material having heat resistance and ultraviolet resistance, but in view of the high output of the ultraviolet lamp, alumina (Al ₂ O ₃ ) or silicon carbide ( It is preferable to use a ceramic material such as SiC.

  According to this embodiment, when using an intermediate pressure lamp whose lamp surface is hot, ultraviolet rays received by the insulation coated conductor are limited by installing the insulation coated conductor only in the vicinity of the opening ends on both sides of the sleeve. The amount of irradiation can be reduced, and the progress of thermal deterioration of the coating insulating material can be delayed.

  Next, an apparatus according to a sixth embodiment will be described with reference to FIG. In addition, in this embodiment, description of the part which overlaps with said embodiment is abbreviate | omitted.

  The damage detection device 1E according to the present embodiment includes a lamp sleeve 4 in which a plurality of conductive wires 14a and 14b are embedded in the material constituting the wall of the lamp sleeve. The lamp sleeve 4 is usually made of a quartz glass tube having a high ultraviolet transmittance. Accordingly, in the apparatus 1E of the present embodiment, the quartz glass itself in which the conducting wires 14a and 14b are embedded serves as an insulating coating for the conducting wires. The description will be made assuming that the embedded conductive wires 14a and 14b are two. There may be two or more. The embedded conductors 14a and 14b have at least one conductive portion 15a and 15b exposed on the inner wall of the lamp sleeve. The conductive portions 15a and 15b exposed on the inner walls of the lamp sleeve of the two embedded conductors 14a and 14b are preferably close to each other. The lamp sleeve damage is detected by conducting the conductive portions 15a and 15b of the two conducting wires 14a and 14b. There may be a plurality of conductive portions 15a and 15b exposed on the inner wall of the lamp sleeve, and in that case, inflow of water due to damage to the lamp sleeve can be detected at each position as in the apparatus 1B of the third embodiment. .

  According to the present embodiment, by embedding a conducting wire in the lamp sleeve, it is possible to save the trouble of installing the conducting wire in the lamp sleeve, and to build a situation where it can be reliably detected. Further, according to the present embodiment, there is no need for an insulating coating, and the factor that hinders the ultraviolet illuminance can be reduced. Further, according to the present embodiment, when an ultraviolet lamp having a high temperature on the lamp surface is used, even when the lamp sleeve is horizontally installed, damage detection can be realized at a plurality of locations in the lamp sleeve, and early detection can be performed. It can be easily realized.

  Note that the present invention is not limited to the above-described embodiment, and the above-described embodiment and other embodiments can be combined as appropriate.

1, 1A, 1B, 1C, 1D, 1E ... UV disinfection device, 2 ... container,
3 ... UV lamp, 4 ... Lamp sleeve,
5 ... Inflow pipe, 6 ... Discharge pipe,
7: Insulated coated conductor,
8, 8a, 8b ... conductive portion (exposed portion of the conductive wire),
9: Conductivity detection means (no float switch, conductive level switch),
10 ... Damage to the lamp sleeve (damaged part), 11 ... treated water flowing from the damaged part,
12 ... Insulating cap, 12a ... Hollow part,
13 ... Lamp sleeve cap,
14a, 14b ... buried conductors,
15a, 15b... Conductive portions (exposed portions of embedded conductors).

Claims (10)

A container into which a conductive fluid to be treated flows;
An ultraviolet lamp for irradiating the fluid to be treated flowing in the container with ultraviolet rays;
A light-transmitting lamp sleeve containing the ultraviolet lamp;
A plurality of conductive wires each having a conductive portion electrically conductive in the lamp sleeve, the other portions excluding the conductive portion being insulated;
An electrical change flowing through the conductor when a fluid to be treated that has entered the lamp sleeve contacts at least one of the conductive portions is detected, and the lamp sleeve is detected based on a signal of the detected electrical change. A conductivity detection means for reporting damage;
An apparatus for detecting damage to a lamp sleeve for an ultraviolet disinfection device.   The apparatus of claim 1, wherein the plurality of conductors are disposed along a gap formed between the lamp sleeve and the ultraviolet lamp.   Each of the plurality of conductors is covered with an insulation, and the conductive portion is an exposed portion from which the insulation of the insulated wire is removed, and the exposed portion is not in contact with each other in the length direction of the conductor. 3. The apparatus according to claim 1, wherein the plurality of conductors are arranged with the positions of the exposed portions being shifted from each other. 4.   The apparatus according to claim 1, further comprising a hollow insulating cap that covers a part of the conductive portion.   The lamp sleeve has a closed end where one end is closed and an open end where the other end is open, the closed end is disposed below the open end, and the conductive portion is closed The device according to claim 1, wherein the device is arranged near an end.   The lamp sleeve has a closed end whose one end is closed and an open end whose other end is open, and the plurality of insulated wires are connected from the open end to the closed end. 5. The apparatus according to claim 1, wherein the apparatus is disposed so as to pass through, and has at least one conductive portion in an intermediate portion other than a tip in the lamp sleeve. 6.   The lamp sleeve has an open end that is open at one end, the open end is disposed below the other end, and has a lamp sleeve cap that covers the open end, and the tip of the conducting wire 5. The tip of the plurality of conducting wires is inserted into the lamp sleeve from the opening end so that the conductive portion exposed to the opening is positioned in the vicinity of the opening end. 6. The apparatus according to item 1.   As the ultraviolet lamp, an ultraviolet lamp having a surface temperature of 200 ° C. or higher is used, the lamp sleeve has an open end with both ends open, the lamp sleeve is installed substantially horizontally, and the leading end of the conducting wire The plurality of insulation-coated conductors are inserted into the lamp sleeve from each of the opening ends so that the exposed conductive portions are positioned in the vicinity of the opening ends, respectively. 5. The apparatus according to any one of 4 above.   The lamp sleeve is characterized in that the conductive wire is embedded in a sleeve wall constituting the lamp sleeve, and at least two conductive wires having at least one conductive portion exposed on the inner wall surface of the lamp sleeve. The apparatus according to claim 1.   The apparatus according to claim 1, wherein the conductivity detection unit includes a detection circuit connected to a DC power source.

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