JP5765618B2 - Water sterilization lamp unit - Google Patents

Description

  The present invention relates to a water sterilization lamp unit that is disposed in a flow path of water to be treated and sterilizes the water to be treated flowing through the flow path with ultraviolet rays.

Conventionally, an ultraviolet lamp unit has been installed in the flow path for treated water such as ballast water, sewage, industrial wastewater, and pure water used in semiconductor factories, and the treated water flowing through the flow path is irradiated with ultraviolet light to sterilize it. Things are done.
The ultraviolet lamp unit used here is generally an ultraviolet lamp, a glass outer tube arranged so as to surround the ultraviolet lamp, and an opening side end of the outer tube provided on the outer circumference side of the duct in the flow path. And an outer tube holding member that holds liquid tightly. The ultraviolet lamp unit configured in this way is made of a ceramic material whose surface is covered with an elastic member as a countermeasure against vibration due to pulsation of the fluid to be treated. A water sterilization lamp unit has been proposed in which the member absorbs the impact when the lamp collides with the outer tube to prevent the ultraviolet lamp and the outer tube from being damaged (see, for example, Patent Document 1).
Also, an elastic material is placed between one end of the ultraviolet lamp and the outer tube, and when the one end of the ultraviolet lamp collides with the outer tube due to vibration, the elastic material absorbs this collision force. A water sterilization lamp unit that prevents damage to an ultraviolet lamp or an outer tube has been proposed (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 11-216467 Japanese Patent Laid-Open No. 9-168780

  However, although the structure described in Patent Document 1 has not been described in detail for fixing the end of the outer tube and the pressing plate in contact with the end of the outer tube, it is a liquid-tight structure. In addition, since the end of the outer tube and the pressing plate are in direct contact, when a strong force is generated in the axial direction of the ultraviolet lamp, the end of the outer tube is damaged by being pressed against the pressing plate. There is a fear. Further, most of the outer tube holding member that holds the outer periphery of the end portion of the outer tube is metallic, and generally there is no member that cushions the impact between the outer tube and the outer tube holding member. Not shown. For this reason, when receiving vibration in a direction perpendicular to the axis of the ultraviolet lamp, the outer tube and the end of the outer tube holding member repeatedly come into contact with each other, which may damage the outer tube at the end of the outer tube holding member. .

  In addition, the structure described in Patent Document 2 is such that one end of a jacket (outer tube) is fixed to a cylindrical holder (outer tube holding member) with two kinds of O-rings, and a cap-like one is used to prevent it from coming off. The jacket is attached to the cylindrical holder, but with this attachment method, there is a possibility that the jacket and the cap-like one or the cylindrical holder will come into contact with each other by vibration and break. Furthermore, since a protective cylinder (resin or metal) is directly inserted into the other end of the jacket, there is no problem when receiving vibration in the axial direction of the ultraviolet lamp, but it is perpendicular to the axis of the ultraviolet lamp. When receiving vibration in the direction, the jacket and the end of the protective cylinder come into contact repeatedly, and the jacket may be damaged at the end of the protective cylinder due to the vibration as in the structure described in Patent Document 1. .

Thus, in the structures described in Patent Documents 1 and 2, the water sterilization lamp unit may vibrate and the outer tube (jacket) may be damaged. In particular, when the water sterilization lamp unit is applied to a ballast water sterilization device, the outer tube is always subjected to the vibration of the ship's engine, and the outer tube (jacket), the outer tube holding member (protective tube), and the end are repeatedly contacted. There is a problem that the outer tube is easily damaged and the outer tube (jacket) is likely to be damaged at the end of the outer tube holding member (protective tube).
In addition, the structures described in Patent Documents 1 and 2 both have an outer tube holding member (protective cylinder) that holds the outer tube (jacket), and most of the structure is made of metal, and thus is generated by the heat of the ultraviolet lamp. There is a problem that the outer tube (jacket) may be damaged due to a difference in thermal expansion between the outer tube (jacket) and the outer tube holding member (protective cylinder).

  An object of the present invention is to provide a water sterilizing lamp unit capable of preventing damage due to vibration of an outer tube and an ultraviolet lamp.

To achieve the above object, the glass an invention according to claim 1, a water sterilizing lamp units arranged in the flow path, which is arranged so that the ultraviolet lamp straight pipe, surrounding the UV lamp interposed the outer tube manufactured, and an outer tube holding member for holding the opposite ends of the outer tube from the outer peripheral side, UV resistant elastic resin buffer member between the outer tube and the outer tube holding member The buffer member interposed between the outer tube holding member and the outer tube, wherein the end portion on the opening side of the outer tube is liquid-tightly fixed to the outer tube holding member, and the both ends of the outer tube are held. In this case, a buffer member interposed between the opening-side end portion of the outer tube and the outer-tube holding member that holds the opening-side end portion is fitted to the outer periphery of the opening-side end portion of the outer tube. The ultraviolet lamp is fixed in the outer tube by an ultraviolet lamp holding member. , The UV lamp holding member in the both sides of the ultraviolet lamp, that the member having an elastic function mutually press each biasing the ultraviolet lamp holding member in the axial direction the UV lamp from both sides are provided Features.

According to the first aspect of the present invention, even if the outer tube and the end of the outer tube holding member are repeatedly brought into contact with each other due to vibration, the ultraviolet ray resistant interposed between the outer tube holding member and the outer tube. The shock absorbing member made of an elastic resin absorbs the vibration, thereby preventing the outer tube from being damaged.
Further, vibration generated at the opening side end portion of the outer tube and the end portion of the outer tube holding member that holds the opening side end portion due to vibration of the water sterilization lamp unit is reduced to the opening side end portion of the outer tube. And the said buffer member interposed between the said outer tube holding member holding this opening side edge part absorbs, and the failure | damage of the said outer tube can be prevented.

Further, according to the invention described in claim 1 , since the ultraviolet lamp is fixed in the outer tube by the ultraviolet lamp holding member, the ultraviolet lamp, the outer tube, and the like even if the water sterilizing lamp unit vibrates. Can be avoided, and damage to the ultraviolet lamp and the outer tube can be prevented.

According to a second aspect of the invention, according to claim 1, wherein the outer tube has one end has a bottomed cylindrical body open other end is closed, the bottom end of the front Symbol outer tube And a buffer member interposed between the outer tube holding member that holds the bottom side end portion is a bottomed cylindrical shape that receives a tip of the bottom side end portion of the outer tube. A member having an elastic function for urging the bottomed cylindrical buffer member in the axial direction of the outer tube is interposed between the buffer member and the outer tube holding member.

According to the invention described in claim 2, the bottom end of the front Symbol outer tube, the bottom end of the outer tube vibration of the outer tube holding member for holding the bottom end the outer An elastic function that absorbs the buffer member interposed between the buffer holding member and further urges the buffer member in the axial direction of the outer tube, interposed between the buffer member and the outer tube holding member; The member with which the bottom end of the outer tube is fixed elastically, the bending stress generated at the opening side end of the outer tube due to vibration of the outer tube can be reduced, and by these synergistic effects Breakage of the outer tube can be prevented.
Further, the elastic member that is interposed between the buffer member and the outer tube holding member and biases the buffer member in the axial direction of the outer tube is deformed in the axial direction of the outer tube due to temperature change. That is, it is possible to absorb the difference in thermal expansion between the outer tube and the outer tube holding member caused by the heat of the ultraviolet lamp, and to prevent the outer tube from being deformed due to a temperature change.

The invention described in claim 3 is characterized in that the ultraviolet-resistant elastic resin according to any one of claims 1 and 2 is a fluororesin.

According to invention of Claim 3 , since the said ultraviolet-resistant elastic resin is a fluororesin, even if the said water sterilization lamp unit receives a strong vibration, the repeated stress of the said outer tube, the said outer tube, and the said outer tube Contact with the holding member can be prevented, and excellent durability against ultraviolet rays can be obtained.

According to the water sterilizing lamp unit according to the present invention, even if the outer tube and the outer tube holding member are subjected to vibration, they are made of an ultraviolet resistant elastic resin interposed between the outer tube holding member and the outer tube. The buffer member can absorb the vibration, so that the outer tube and the ultraviolet lamp can be prevented from being damaged. In particular, the environment is always subjected to vibration for a long period of time, for example, ballast water. It is most suitable as a water sterilization lamp unit applied to a sterilizer.

It is sectional drawing which shows the 1st example of embodiment of the water sterilization lamp unit which concerns on this invention. It is sectional drawing which shows the 2nd example of embodiment of the water sterilization lamp unit which concerns on this invention.

Hereinafter, the form for implementing the water disinfection lamp unit which concerns on this invention is demonstrated in detail with reference to the Example shown on drawing.
FIG. 1 is a sectional view showing a first example of an embodiment of a water sterilizing lamp unit according to the present invention.

  The water sterilization lamp unit of this example is provided in a straight tubular ultraviolet lamp 1, a glass outer tube 2 disposed so as to surround the ultraviolet lamp 1, and a duct 4 in a flow path 3. The outer tube holding member 5 that holds the opening side end from the outer peripheral side, and a buffer member 6 made of an ultraviolet resistant elastic resin that is interposed between the outer tube holding member 5 and the outer tube 2.

  The outer tube 2 has a shape in which both sides are opened in this example. The buffer member 6 has a cylindrical shape having a small-diameter inner peripheral portion 6a that is substantially the same as or slightly smaller than the inner diameter of the outer tube 2 and a large-diameter inner peripheral portion 6b that can be closely fitted to the outer periphery of the outer tube 2. Is formed. The large-diameter inner peripheral portion 6b of the buffer member 6 formed in this way is fitted to the outer periphery of the end portions on both sides where the outer tube 2 opens, and the small-diameter inner peripheral portion 6a formed on the inner periphery of the buffer member 6; A stepped portion 6c formed between the large-diameter inner peripheral portion 6b is brought into liquid-tight contact with the open end of the outer tube 2. In this example, a fluororesin is used as the ultraviolet resistant elastic resin forming the buffer member 6.

  In addition, the outer tube holding member 5 is formed in a cylindrical shape that can be closely fitted to the outer periphery of the buffer member 6 in this example. The outer pipe holding member 5 is provided in a duct 4 provided in the middle of the flow path 3 so as to communicate with the inside of the duct 4 and one end portion thereof protrudes from the duct 4. Thus, the outer pipe holding member 5 provided in the duct 4 is provided at a position facing each other in a direction orthogonal to the flow direction of the water to be treated flowing in the duct 4, and the outer pipe at the facing position. By fitting the buffer member 6 fitted to the opening side end portion of the outer tube 2 in the holding member 5, both the opening side end portions of the outer tube 2 are held via the buffer member 6. It is like that. A flange portion 7 to which a pressing member to be described later is attached is provided on the outer periphery of the end portion protruding from the duct 4 of the outer tube holding member 5.

In addition, the opening of the outer tube 2 in which the buffer member 6 is fitted to the opening side end is pressed against the opening end surface of the buffer member 6 on the side of the small-diameter inner peripheral portion 6a, and a cylindrical shape through which the lead wire 9 passes. A pressing member 10 is provided.
The cylindrical holding member 10 has an inner and outer diameter that is substantially the same as the inner and outer diameters of the buffer member 6 on the small diameter inner peripheral portion 6 a side, and the opening end surface on one end side is on the small diameter inner peripheral portion 6 a side of the buffer member 6. It is a surface which presses down the opening end face of. Further, a cap-shaped receiving portion 10a for receiving a member having an elastic function, which will be described later, is provided in the opening on the other end side so as to close the opening, and on the outer periphery, a flange portion 7 of the outer tube holding member 5 is provided. It is the shape where the flange part 11 which opposes was provided.

The pressing member 10 formed in this way is fitted into the outer tube holding member 5 and has an opening end surface fitted to the opening side end portion of the outer tube 2 on the small diameter inner peripheral portion 6a side. The flange portion 11 provided on the outer periphery and the flange portion 7 of the outer tube holding member 5 are fixed by tightening them with a bolt 13 and a nut 14 via a seal ring 12.
By tightening the flange portion 11 of the pressing member 10 and the flange portion 7 of the outer tube holding member 5 with a bolt 13 and a nut 14 via a seal ring 12, the buffer member 6 has an opening end surface on the small-diameter inner peripheral portion 6a side. An opening end surface of the pressing member 10 and a step portion 6c formed between the small-diameter inner peripheral portion 6a and the large-diameter inner peripheral portion 6b are in pressure contact with the opening end of the outer tube 2, and the pressing member 10 and the buffer member 6 In the meantime, the space between the buffer member 6 and the outer tube 2 is liquid-tightly sealed, and the space between the pressing member 10 and the outer tube holding member 5 is liquid-tightly sealed by the seal ring 12.

Further, the ultraviolet lamp 1 surrounded by the outer tube 2 is fixed inside the outer tube 2 with a predetermined distance from the outer tube 2 by an ultraviolet lamp holding member 15. In this example, the ultraviolet lamp 1 is fixed in the outer tube 2 by interposing an ultraviolet lamp holding member 15 between the terminals 8 on both sides of the ultraviolet lamp 1 and the outer tube 2. The ultraviolet lamp holding member 15 is formed of a ceramic or a ceramic surface coated with an ultraviolet resistant elastic resin such as a fluororesin.
Further, between the ultraviolet lamp holding member 15 on both sides of the ultraviolet lamp 1 and the receiving portion 10a provided on the pressing member 10, the ultraviolet lamp holding member 15 is urged in the axial direction, and the ultraviolet lamp 1 is moved to both sides. A member 16 having an elastic function to be pressed is interposed. In this example, the member 16 having an elastic function is a coil spring, but any member having an elastic function may be used.

  The required number of water sterilization lamp units configured in this way are arranged in the duct 4 to constitute an ultraviolet water treatment apparatus in the middle of the flow path 3. The water sterilization lamp unit disposed in the duct 4 uniformly irradiates the water to be treated flowing in the duct 4 and prevents the shadow of the water sterilization lamp unit from affecting the adjacent water sterilization lamp unit. It is preferable to arrange them at equal intervals on a circumference of a staggered arrangement or a concentric circle with respect to the flow of water to be treated flowing inside (not shown).

  According to the water sterilizing lamp unit configured as described above, when the outer tube 2 is subjected to vibration and the outer tube 2 is subjected to repeated stress by the vibration, the resistance to intervening between the outer tube holding member 5 and the outer tube 2 is increased. The buffer member 6 made of ultraviolet elastic resin absorbs and attenuates the vibration, and can prevent the outer tube 2 from being damaged. In particular, in this example, since the outer tube holding member 5 holds the end portions on both sides where the outer tube 2 opens, the outer tube 2 can reduce the repeated stress due to vibration, and the outer tube 2 can be further damaged. It can be surely prevented.

  Further, in this example, the buffer member 6 is a cylinder having a small-diameter inner peripheral portion 6a that is substantially equal to or slightly smaller than the inner diameter of the outer tube 2 and a large-diameter inner peripheral portion 6b that can be closely fitted to the outer periphery of the outer tube 2. The large-diameter inner peripheral portion 6b of the buffer member 6 is fitted to the outer periphery of the end portions on both sides where the outer tube 2 is opened, and the small-diameter inner peripheral portion 6a formed on the inner periphery of the buffer member 6 is large. Since the step part 6c formed between the inner diameter part 6b and the inner diameter part 6b is in contact with the opening end of the outer tube 2, when the outer tube 2 fluctuates in the axial direction due to vibration, this is Absorption is performed on the small-diameter inner peripheral portion 6a side, and damage to the outer tube 2 can be prevented. Since the ultraviolet-resistant elastic resin forming the buffer member 6 is a fluororesin, by absorbing the vibration in the axial direction of the outer tube 2 and avoiding direct contact between the outer tube 2 and the outer tube holding member 5 Prevents damage.

FIG. 2 is a sectional view showing a second example of the embodiment of the water sterilizing lamp unit according to the present invention.
About the water sterilization lamp unit of this example, about the same structure as the said 1st example, the same code | symbol is attached | subjected and the description is abbreviate | omitted, and only a structure different from a 1st example is demonstrated.

  The outer tube 2 of this example is a bottomed cylindrical body having one end opened and the other end closed. Similarly to the first example, the outer tube 2 having such a bottomed cylindrical body is held by the outer tube holding member 5 at both ends thereof with the buffer members 6 interposed therebetween. The outer tube holding member 5 and the buffer member 6 that hold the opening side end portion of the outer tube 2 of the cylindrical body are different in configuration from the outer tube holding member 5A and the buffer member 6A that hold the bottom side end portion. Since the outer tube holding member 5 and the buffer member 6 that hold the opening-side end portion of the outer tube 2 are the same as those in the first example, the description of the first example is cited and the description thereof is omitted.

The outer tube holding member 5A and the buffer member 6A that hold the bottom side end portion of the outer tube 2 will be described. The buffer member 6A has a bottomed cylindrical shape that receives the bottom end of the outer tube 2 inside. It has become. The ultraviolet resistant elastic resin forming the buffer member 6A is also made of a fluororesin, as in the first example.
In the outer tube holding member 5A, in this example, the outer tube holding member 5A is formed on the outer periphery of the buffer member 6A in a bottomed cylindrical shape that can be movably fitted in the axial direction. The outer pipe holding member 5A communicates with the inside of the duct 4 at a position facing the outer pipe holding member 5 that holds the opening side end of the outer pipe 2 in the duct 4 provided in the middle of the flow path 3. In addition, the bottom portion is provided so as to protrude from the duct 4.

In this manner, the buffer member 6A that receives the bottom end of the outer tube 2 inside the outer tube holding member 5A that is provided in the duct 4 and opens in the duct 4 is fitted. The bottom end of the outer tube 2 is held via
A member 17 having an elastic function for biasing the buffer member 6A in the axial direction of the outer tube 2 is interposed between the buffer member 6A and the outer tube holding member 5A. In this example, the member 17 having an elastic function is a coil spring, but any member having an elastic function may be used.

Further, in the ultraviolet lamp holding member 15 that fixes the ultraviolet lamp 1 in the outer tube 2, in this example, ultraviolet rays are placed between the terminal 8 of the ultraviolet lamp 1 on the opening side of the outer tube 2 and the outer tube 2. The ultraviolet lamp 1 is fixed in the outer tube 2 by interposing the lamp holding member 15 between the terminal 8 of the ultraviolet lamp 1 on the bottom side of the outer tube 2 and the outer tube 2. doing.
Further, a member 16 having an elastic function for urging the ultraviolet lamp holding member 15 in the axial direction is interposed between the ultraviolet lamp holding member 15 on the opening side of the outer tube 2 and the receiving portion 10a provided on the pressing member 10. A member 16 having an elastic function for urging the ultraviolet lamp holding member 15 in the axial direction is interposed between the ultraviolet lamp holding member 15 on the bottom side of the outer tube 2 and the bottom of the outer tube 2. The ultraviolet lamp holding members 15 on both sides of the lamp 1 are pressed against each other.
In this example, the lead wire 9 connected to the terminal 8 on the bottom end side of the outer tube 2 of the ultraviolet lamp 1 fixed in the outer tube 2 passes through the outer tube 2 and passes through the outer tube 2. It is pulled out into the pressing member 10 from the opening.

  According to the water sterilizing lamp unit configured as described above, when the outer tube 2 is subjected to vibration and the outer tube 2 is subjected to repeated stress by the vibration, the resistance to intervening between the outer tube holding member 5A and the outer tube 2 is improved. The buffer member 6A made of ultraviolet elastic resin absorbs and attenuates this vibration, and can prevent the outer tube 2 from being damaged. Particularly in this example, the holding force of the outer tube holding member 5A that holds the bottom side end portion of the outer tube 2 is weak, and the outer tube 2 is held by the outer tube holding member 5 that holds the opening side end portion. Elasticity that biases the buffer member 6A receiving the tip of the bottom end of the outer tube 2 in the axial direction of the outer tube 2 while stress is concentrated at the opening end of the outer tube 2. Since the member 17 having a function fixes the bottom end portion of the outer tube 2 by elasticity, the bending stress that the outer tube 2 receives by vibration can be reduced.

Further, even if the bottom end of the outer tube 2 repeatedly fluctuates due to vibration, the buffer member 6A interposed between the bottom end of the outer tube 2 and the outer tube holding member 5A absorbs this variation, Damage to the tube 2 can be prevented.
Further, in this example, when the outer tube 2 fluctuates in the axial direction due to vibration, this is not only interposed between the buffer member 6A and the outer tube holding member 5A, but also between the buffer member 6A and the outer tube holding member 5A. In addition, since the member 17 having an elastic function for urging the buffer member 5a in the axial direction of the outer tube 2 absorbs the fluctuation in the axial direction of the outer tube 2, it is possible to more effectively absorb the temperature. The axial deformation of the outer tube 2 due to the change can also be absorbed.

DESCRIPTION OF SYMBOLS 1 Ultraviolet lamp 2 Outer tube 3 Flow path 4 Duct 5, 5A Outer tube holding member 6, 6A Buffer member 6a Small diameter inner peripheral part 6b Large diameter inner peripheral part 6c Step part 7 Flange part 8 Terminal 9 Lead wire 10 Holding member 10a Receipt Part 11 Flange part 12 Seal ring
13 bolt 14 nut 15 ultraviolet lamp holding member 16 member 17 having elastic function member having elastic function

Claims (3)

A water sterilizing lamp units arranged in the flow path, to retain the ultraviolet lamp straight pipe, and the outer tube made of glass is disposed so as to surround the ultraviolet lamp, the two ends of the outer tube from the outer periphery An outer tube holding member, a buffer member made of UV-resistant elastic resin is interposed between the outer tube holding member and the outer tube, and an opening side end portion of the outer tube is connected to the outer tube holding member and the liquid. Tightly fixed ,
In the buffer member interposed between the outer tube holding member and the outer tube that holds both ends of the outer tube, the opening side end portion of the outer tube and the opening side end portion are held. A buffer member interposed between the outer tube holding member and the outer tube has a cylindrical shape that fits to the outer periphery of the opening side end,
The ultraviolet lamp is fixed in the outer tube by an ultraviolet lamp holding member, and the ultraviolet lamp holding members on both sides of the ultraviolet lamp are respectively energized with the ultraviolet lamp holding member in the axial direction. A water sterilizing lamp unit, characterized in that a member having an elastic function of pressing from both sides is provided . It said outer tube has one end has a bottomed cylindrical body open other end is closed, and the bottom end of the front Symbol outer tube, said outer tube holding member for holding the bottom end A buffer member interposed between the bottom tube end and the outer tube holding member is provided between the bottom tube receiving member and the outer tube holding member. The water sterilizing lamp unit according to claim 1 , wherein a member having an elastic function for biasing a bottom cylindrical buffer member in an axial direction of the outer tube is interposed. Water sterilizing lamp unit according to any one of claims 1 or 2, wherein the UV-resistant elastic resin is a fluorine resin.

Images