JPH05253565A - Ultraviolet irradiation device - Google Patents

Abstract

PURPOSE:To perform efficient treatment as a whole by making the thickness of a fluid layer to be treated constant. CONSTITUTION:An external irradiation type ultraviolet irradiation device is constituted of a casing 1, a lamp holder 2, a lamp socket 3, an ultraviolet (sterilizing) lamp 4, an inner and outer pipe attaching pipe 5 becoming the inlet or outlet of a fluid to be treated, a water pipe (tube) 6 composed of an ultraviolet transmissible material and the fixing band 7 of the water pipe 6. An inner cylindrical pipe 8 is sealed at one end thereof and attached to the tip support jig 9 provided to the other end part of the water pipe 6 and the other end thereof is attached to the seal gland provided to the phase flange 10 of the flange part provided at the position continuing to the water pipe 6 of the inner and outer pipe attaching pipe 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultraviolet irradiator used for an ultraviolet sterilizer or an organic substance decomposer.

[0002]

2. Description of the Related Art A so-called external illumination type ultraviolet irradiation device for irradiating ultraviolet rays from the outside of a water pipe made of an ultraviolet-transparent material has been put into practice. Such an externally illuminated device is convenient for replacing, repairing, inspecting, and maintaining the ultraviolet lamp, and strongly protects the inner surface of the water pipe with strong ultraviolet light, especially when the fluid stagnates on the inner surface of the water pipe. It has an excellent feature that it is irradiated with light to prevent pollution.

However, in such an external illumination type ultraviolet irradiation device, if the ultraviolet ray permeability of the treated fluid such as milk or sugar water is poor, the amount of ultraviolet rays reaching the central portion of the water pipe is reduced and sterilization is performed. Etc., the processing effect is reduced. Therefore, conventionally, in order to obtain a sufficient processing effect in the central portion of the water pipe, processing such as slowing down the flow velocity of the entire processing fluid is performed at the expense of efficiency.

[0004]

The problem to be solved is to sacrifice efficiency such as slowing down the flow velocity of the entire processing fluid in the external illumination type ultraviolet irradiation device when the ultraviolet transmittance of the processing fluid is poor. It means that processing must be performed.

[0005]

DISCLOSURE OF THE INVENTION The present invention is an ultraviolet irradiating device for irradiating ultraviolet rays from the outside of a water pipe 6 made of an ultraviolet permeable material, and an inner cylindrical pipe 8 sealed inside the water pipe. The ultraviolet irradiating device is characterized in that the structure is provided so that the layer thickness of the processing fluid between the water passage pipe and the inner cylindrical pipe is kept constant.

[0006]

According to this, since the layer thickness of the processing fluid is kept constant, a constant processing effect can be obtained as a whole, and efficient processing can be performed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is a casing, 2 is a lamp holder, 3 is a lamp socket, and 4 is an ultraviolet (sterilizing) lamp. In addition, 5 is an inner or outer pipe mounting pipe that serves as an inlet or an outlet of the processing fluid, 6 is a water pipe (tube) made of an ultraviolet-transparent material, and 7 is a fixing band of the water pipe 6, and these are of the external illumination type as a whole. It constitutes an ultraviolet irradiation device. In addition, a similar inner / outer pipe mounting pipe 5 ′ is also provided on the other end side of the water passage pipe 6.
Are provided, but the illustration is omitted.

Reference numeral 8 denotes an inner cylindrical pipe, and one end of the inner cylindrical pipe 8 is sealed and attached to a tip support 9 provided at the other end of the water passage pipe 6, and the other end is attached to the inner and outer pipes. The pipe 5 is attached to a seal gland provided on a companion flange 10 of a flange portion provided at a position continuous with the water passage pipe 6. That is, the seal nut 11 is attached to the other end of the inner tube 8.
Is provided, and the inner tube 8 and the seal nut 11 are attached to the companion flange 10 via the seal packing (O ring) 12. Reference numeral 13 is a flange packing.

In this apparatus, for example, the cross section indicated by arrow a is as shown in FIG. Further, the cross section indicated by the arrow b is as shown in B of the same figure, where D is the inner diameter of the water pipe 6 and d is the outer diameter of the inner cylinder pipe 8, the water communication pipe 6 and the inner cylinder pipe 8 are A gap of t = (D−d) / 2 is formed between the two. This interval is constant over the entire circumference and substantially the entire length of the inner tube 8, and the layer thickness of the processing fluid flown thereby is kept thin and constant (t).

Therefore, in this apparatus, since the layer thickness of the processing fluid becomes thin, the ultraviolet ray transmission distance becomes short, and sufficient processing can be performed even when the ultraviolet ray permeability of the processing fluid is poor. Further, since the layer thickness of the flown processing fluid becomes constant, a constant processing effect can be obtained in the entire processing fluid, and efficient processing can be performed. That is, since the layer thickness of the treatment fluid is constant, stable treatment performance can be obtained by considering the layer thickness (t) and determining the irradiation output of the ultraviolet lamp 4, the flow velocity of the treatment fluid, and the like.

The outer diameter (d) of the inner cylindrical tube 8 may be changed according to the ultraviolet ray permeability of the processing fluid to obtain a more suitable layer thickness (t). It is also possible to irradiate ultraviolet rays from both the inside and outside of the processing fluid by providing the inner tube 8 with a material that is transparent to ultraviolet light and providing an ultraviolet lamp inside the inner tube 8.

Thus, according to the above-mentioned apparatus, since the layer thickness (t) of the processing fluid is kept constant, a constant processing effect can be obtained as a whole and efficient processing can be performed.

Further, in the above-mentioned apparatus, the effect of agitating the processing fluid can be enhanced by making the inner tubular tube 8 not in the tubular shape but in the spiral shape 30 as shown in FIG.

Further, as shown in FIG. 4, by providing the brush 40 in the structure of the inner tubular pipe 8, it is possible to remove the dirt and the like adhering to the inner wall surface of the water passage pipe 6 when the inner tubular pipe 8 is taken in and out. By using a structure in which the inner cylindrical tube 8 is fixed to the seal gland, the inner cylindrical tube 8 can be moved.

Further, if the surface of the inner tube 8 is made of a material having a high ultraviolet reflectance, the performance can be improved. Further, if the material of the inner tube 8 is a photoreactive metal semiconductor (titanium dioxide or the like), the performance can be further improved.

[0016]

According to the present invention, since the layer thickness of the processing fluid is kept constant, a constant processing effect can be obtained as a whole and efficient processing can be performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an example of an ultraviolet irradiation device according to the present invention.

FIG. 2 is a diagram for explaining the explanation.

FIG. 3 is a configuration diagram of an application example.

FIG. 4 is a configuration diagram of an application example.

[Explanation of symbols]

 1 Casing 2 Lamp Holder 3 Lamp Socket 4 Ultraviolet (Sterilizing) Lamp 5 Inner / Outer Tube Mounting Tube that Becomes Inlet or Outlet of Treatment Fluid 6 Water Pipe (Tube) Made of Ultraviolet Transparent Material 7 Fixing Band 8 Inner Tube 9 Tool 10 Companion flange 11 Seal nut 12 Seal packing (O-ring) 13 Flange packing

Claims (2)

[Claims] 1. An ultraviolet irradiating device for irradiating ultraviolet rays from the outside of a water pipe made of an ultraviolet permeable material, wherein a sealed inner tube is provided inside the water pipe, and the water pipe and the inner pipe are provided. An ultraviolet irradiation device characterized in that a layer thickness of a processing fluid between the cylindrical tube and the cylindrical tube is kept constant. 2. The ultraviolet irradiation device according to claim 1, wherein a structure is provided in which a flange is provided at one end of the water passage pipe and a seal gland for attaching the inner cylindrical pipe is provided at the companion flange.