JPH1034142A - Ultraviolet sterilizer for flowing water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an ultraviolet sterilizer for flowing water in which an ultraviolet lamp is protected by an outside tube which is a quartz tube produced in general to reduce costs, and the leakage of water is prevented completely by sealing. SOLUTION: When an ultraviolet lamp 8 which is protected by an outside tube 6 is installed in a jacket 1 in which water flows from an inlet 2 toward an outlet 3, since the tube 6 is attached to a jacket lid 4 through an elastic seal tube 17 with a flange, the base tube part 18 of the straight tube of the tube 17 is inserted into the upper end part of the outside tube while being tightened by a hose band 20, and a horizontal flange part 19 is tightened by a screw 24 to be fixed while being pressed to the jacket lid by a press plate 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sterilizer, and more particularly to an ultraviolet sterilizer for running water provided in a circulation path of running water for sterilizing running water with ultraviolet rays.

[0002]

2. Description of the Related Art Conventionally, it has been widely practiced to sterilize running water in the middle of a circulation path. For this purpose, an ultraviolet sterilizer using an ultraviolet lamp as a sterilizer has a small size, a high sterilization ability, and easy sterilization. It is widely used as a device.

[0003] The ultraviolet sterilizer has a structure in which an ultraviolet lamp is covered with an outer tube and disposed in a jacket, and when the flowing water flows from the water inlet to the water outlet in the jacket, the ultraviolet light is sterilized.

FIG. 5 shows an example of this ultraviolet sterilizer. A jacket 1 is provided with a water inlet 2 and a water outlet 3, and an upper end opening is closed by a jacket lid 4, and is made of metal or plastic. Made.

[0005] Reference numeral 6 denotes an outer tube made of glass such as quartz, which has good ultraviolet transmittance, and this outer tube 6 is provided with a general packing 7 such as an O-ring in an attachment hole 5 provided at the center of the jacket cover 4. It is fitted and attached while sealing with no leakage.

Numeral 8 denotes an ultraviolet lamp inserted into the outer tube 6. In the jacket 1, the ultraviolet lamp 8 is covered with the outer tube 6 so as not to come into direct contact with water, and is broken by a temperature difference. Deployed in a protected state.

FIG. 6 shows another example of a conventional ultraviolet sterilizer. In this example, an outer tube 6 covering the outside of an ultraviolet lamp 8 is attached to a jacket lid 4 by an adhesive 9 while being attached to a mounting hole 5. It is fitted and fitted.

[0008]

However, the outer tube 6 for protecting the ultraviolet lamp 8 is fitted to the mounting hole 5 using the packing 7 or the adhesive 9 on the jacket lid 4 as in the conventional ultraviolet sterilizer. If attached, the manufacturing cost would be very high and the durability of the seal would be poor.

First, as shown in FIG. 5, when the outer tube 6 is fitted in the mounting hole 5 in the jacket lid 4 while sealing using a packing 7 such as an O-ring,
Very high dimensional accuracy is required for the manufacture of the outer tube 6, and the yield is very low, so that the cost is high.

[0010] In the case of sealing using an O-ring, the outer tube 6 having a diameter of about 20 mm has an outer diameter of 0 m.
m, minus 0.06 mm accuracy is required.

[0011] However, generally manufactured diameter 20m
The outer diameter in the case of a quartz tube of about m has an accuracy of plus or minus about 0.5 mm.

Therefore, in order to obtain the outer tube 6 that satisfies the seal using the O-ring, a quartz tube satisfying the dimensional accuracy of the outer diameter can be manufactured by custom order, or a generally manufactured quartz tube can be manufactured by using a heat lathe. It must either be used for post-processing or only those that meet the dimensional accuracy must be selected.

[0013] If a quartz tube is manufactured as a special order, the cost is naturally extremely high, and the post-processing is also very difficult, and the cost is also very high. Only those having the same outer diameter are selected from the inside and used as the outer tube 6.

However, as for the outer tube 6, if only those which satisfy the dimensional accuracy of the outer diameter are selected from generally manufactured quartz tubes, the yield is extremely low, so that the cost is inevitably increased.

Next, as shown in FIG. 6, when the outer tube 6 is fitted to the jacket cover 4 by fitting it into the mounting hole 5 while sealing using an adhesive 9, the outer diameter of the outer tube 6 is reduced. Since high precision is no longer required, a generally manufactured quartz tube can be used as it is as the outer tube 6.

However, when the outer tube 6 is fitted into the mounting hole 5 by fitting the outer tube 6 to the jacket lid 4 while sealing with the adhesive 9, the application of the adhesive 9 is troublesome, and at the same time, the adhesive 9 is cured. It takes a long time to perform the process, and furthermore, the bonding failure increases, and the manufacturing cost also increases.

In addition, the sealing with the adhesive 9 deteriorates when ultraviolet rays are applied for a long period of time, so that there is a problem that the effect of the sealing is lost during use and the maintenance of the apparatus becomes serious.

In order to solve the disadvantage of the adhesive, it is considered to use a packing such as an O-ring, or to shield the adhesive from ultraviolet rays. However, if such a method is adopted, the cost is further increased. Become.

The present invention solves the above-mentioned drawbacks of the prior art, and utilizes a generally manufactured quartz tube as the outer tube 6 as it is, and furthermore, this outer tube 6 has a complete sealing effect for a long period of time. An object of the present invention is to provide an ultraviolet sterilizer for running water which can be easily fitted to the jacket lid 4 by fitting it into the mounting hole 5 while being held, has low manufacturing costs, and is easy to maintain.

[0020]

That is, according to the present invention, an ultraviolet lamp is provided in a jacket through which water flows from a water inlet to a water outlet, protected by an outer tube attached to a jacket lid for sealing an upper end opening, In an ultraviolet sterilizer for running water that sterilizes water flowing in the jacket with ultraviolet light, the tip opening is attached to the jacket lid via an elastic seal tube fitted with an outer tube, and the outer tube is attached to the jacket lid. Is sealed by a resilient seal tube with a large seal area, so that a generally manufactured quartz tube can be used as an outer tube.

Further, when the elastic seal tube is fitted to the outer tube, the elastic tube is tightened with a spring material so that the seal is more complete,
Further, the elastic seal tube is a flanged elastic seal tube having a horizontal flange portion provided at an upper end, and the horizontal flange portion of the flanged elastic seal tube is closely attached to a peripheral portion of the mounting hole of the jacket lid, or the jacket lid is lowered to the mounting hole. A jacket with a lower flange provided with a flange portion extending vertically to the outer flange is tightly fitted to the jacket lid over a wide area by fitting the tip of the elastic seal tube to the lower flange of this lower flanged jacket lid. So that the mounting seal is complete.

[0022]

Embodiments of the present invention will now be described with reference to the drawings.

An embodiment of the present invention will be described with reference to a first embodiment shown in FIGS. 1 to 3. The same reference numerals are given to the same components as those in the conventional example.

First, the overall structure of the apparatus will be described with reference to the overall longitudinal sectional view of FIG. 1. In the jacket 1, the jacket lid 4 is screwed to the opening at the upper end via an O-ring packing 10. It is stopped and attached to completely prevent water leakage, and a rubber cap 12 is fitted to the tip of the outer tube 6 to prevent damage when removed for cleaning or the like.

The ultraviolet lamp 8 is of a straight tube type and has electrodes 13 provided at both ends, and is held by a lamp base 14. At the same time, a nickel-plated wire 15 that can be soldered is drawn out from one electrode 13, and the other electrode 13 is drawn out. The electrode 13 and the lamp base 14 are connected by a bare wire 16, and the electrode 13 on the lamp base 14 side and the bare wire 16 are spot-welded to a lead wire at a recess in the lamp base 14 and molded with steatite or the like together with the lamp end face. ing.

Reference numeral 17 denotes a flanged elastic seal pipe in which a base pipe portion of a straight pipe is fitted to the upper end of the outer pipe 6.
Is attached to the jacket lid 4 via the flanged elastic seal pipe 17 as described later in detail, and 25 is a water leak detection sensor for preventing an accident when the outer pipe 6 is broken and water leaks. is there.

Next, the detailed construction of attaching the outer tube 6 to the jacket lid 4 via the elastic sealing tube 17 with a horizontal flange while sealing it with the attachment hole 5 will be described in detail with reference to the partially exploded perspective view of FIG. Description will be given based on a front view.

The flanged elastic seal tube 17 fitted to the upper end of the outer tube 6 is made of a material such as fluorine rubber which has elasticity and is not easily deteriorated by ultraviolet rays. A horizontal flange 19 extends horizontally from the upper end of the pipe 18.

Reference numeral 20 denotes a hose band. The hose band 20 is made of a material having a spring property, and tightly tightens a base tube portion 18 of a flanged elastic seal tube 17 fitted to the outer tube 6 from the outside. Try to increase the sealing effect.

Reference numeral 21 denotes a pressing plate, and when the outer tube 6 is attached to the jacket lid 4 via the elastic sealing tube 17 with the flange in alignment with the mounting hole 5, the horizontal flange portion 19 comes into close contact with the periphery of the mounting hole 5. It is a plate for holding down so that it can be attached.

Reference numeral 22 denotes a plurality of screw holes provided at predetermined intervals for mounting the outer tube 6 around the mounting hole 5 of the jacket lid 4. The mounting plate 21 has a plurality of screw holes corresponding to the screw holes 22. A screw insertion hole 23 is provided, and 24 is a screw hole 2
2 is a mounting screw to be screwed.

Therefore, in order to attach the outer tube 6 to the jacket lid 4, first, the base tube portion 18 of the flanged elastic seal tube 17 is fitted to the distal end portion of the outer tube 6, and tightly fastened with the hose band 20.

Next, the opening of the distal end of the outer tube 6 into which the base tube portion 18 of the flanged elastic seal tube 17 has been fitted is aligned with the mounting hole 5 of the jacket lid 4, and the holding plate 21 fitted with the horizontal flange is used. The part 19 is pressed down while aligning the screw insertion hole 23 with the screw hole 22, and finally the screw 24 is screwed into the screw hole 22 and stopped.

As a result, the outer tube 6 is attached to the jacket lid 4.
The opening at the distal end is aligned with the mounting hole 5, and the mounting is completed in a completely sealed state via the fitted elastic sealing pipe 17 with flange.

That is, as the outer tube 6, a generally manufactured quartz tube is used as it is, and even if the tolerance of the outer diameter is about plus or minus 0.5 mm, the flanged elastic seal pipe 1 is used.
The base pipe portion 7 is tightly fitted, and further tightly fitted by tightly fastening with a hose band 20 having spring properties.

The outer tube 6 tightly fitted with the base tube portion 18 of the flanged elastic seal tube 17 as described above is mounted on the jacket lid 4 by pressing the horizontal flange portion 19 of the flanged elastic seal tube 17 onto the holding plate 21. And is attached in close contact with a large area around the mounting hole 5.

As a result, the outer pipe 6 is completely covered with the jacket lid 4 by the complete sealing effect of the base pipe section 18 of the flanged elastic seal pipe 17 and the horizontal flange section 19 in a wide area without any fear of water leakage. It is attached.

Next, a second embodiment will be described with reference to FIG.

In the second embodiment, reference numeral 26 denotes a jacket lid with a lower flange. The jacket lid 26 with a lower flange has a vertical flange portion 27 extending downwardly around the mounting hole 5, and a straight cover 28. It is a tube-type elastic seal tube, and is formed as a straight tube including a lower outer tube fitting portion 29 and an upper flange fitting portion 30 each having a diameter suitable for fitting.

The outer tube 6 is connected to the jacket lid 2 having a lower flange.
6, the outer pipe fitting part 29 of the straight pipe type elastic seal pipe 28 is fitted to the upper end of the outer pipe 6, and the flange fitting part 30 is fitted.
Vertical flange portion 27 of jacket lid 26 with flange
And each fitting portion is tightened with the hose band 20.

Also in this second embodiment, a general quartz tube having an outer diameter tolerance of approximately plus or minus 0.5 mm can be used as the outer tube 6, and the flanged jacket lid 2 can be used.
It goes without saying that the vertical flange portion 27 provided in 6 also has a loose outer diameter tolerance and does not require precise machining.

[0042]

According to the present invention, the quartz tube generally manufactured as an outer tube for protecting the ultraviolet lamp can be used as it is, so that the cost of the outer tube can be reduced and the outer tube can be covered with a jacket cover. When the device is mounted on the device, the structure is simple, troublesome, and no defect is caused, so that the assembly cost is reduced and the device can be manufactured at a low cost.

In addition, the sealing effect against water leakage by the elastic seal tube is perfect, and if the elastic seal tube is made of a material resistant to ultraviolet rays such as fluoro rubber, it is difficult to deteriorate. Since the band is tightened and the sealing effect is maintained for a long period of time, the maintenance of the device is inexpensive.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a first embodiment,

FIG. 2 is a partially exploded perspective view of the first embodiment,

FIG. 3 is a front view of the first embodiment,

FIG. 4 is a longitudinal sectional view of a second embodiment,

FIG. 5 is a longitudinal sectional view of a first conventional example,

FIG. 6 is a longitudinal sectional view of a second conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 jacket 4 jacket lid 5 mounting hole 6 outer tube 8 ultraviolet lamp 17 elastic seal tube with flange 18 base tube portion 19 horizontal flange portion 20 hose band 21 holding plate 24 set screw 26 jacket lid with lower flange 27 lower flange portion 28 straight pipe Type elastic seal pipe 29 Outer pipe fitting part 30 Flange fitting part

Claims (4)

[Claims] 1. An ultraviolet lamp is provided in a jacket through which water flows from an inlet to an outlet, protected by an outer tube attached to a jacket lid that seals an upper end opening, and water flowing in the jacket is sterilized by ultraviolet rays. An apparatus for sterilizing running water, comprising: a sterilizing apparatus for running water, wherein a front end opening is fitted to a mounting hole via an elastic seal tube fitted with an outer tube, and the apparatus is attached to a jacket lid. 2. The sterilizing apparatus for running water according to claim 1, wherein said elastic pipe is fitted to said outer pipe by tightening with a spring material. 3. An elastic seal tube with a flange provided with a horizontal flange portion at an upper end thereof, wherein the horizontal flange portion of the elastic seal tube with the flange is brought into close contact with a periphery of a mounting hole of the jacket lid, thereby forming the outer tube. 3. A sterilizer for running water according to claim 1, wherein a pipe is attached to said jacket lid. 4. A jacket cover having a lower flange provided with a flange portion extending vertically downward in the mounting hole, and a distal end portion of a straight pipe-type elastic seal pipe is provided at a lower flange portion of the jacket cover having the lower flange. 3. An apparatus for sterilizing running water according to claim 1, wherein the outer tube is attached to a jacket lid by fitting the outer tube to the jacket.