KR102199800B1 - Method for cleaning quartz tube of ultraviolet rays sterilizer - Google Patents

Abstract

According to the present invention, a method for cleaning a quartz tube of an ultraviolet sterilizer moves a ring-shaped cleaning member to a second position while alternatively repeating forward movement toward the second position and backward movement toward a first position by a distance shorter than a movement distance in case of the forward movement when the ring-shaped cleaning member is moved from the first position at one end portion of the quartz tube to the second position at the other end portion of the quartz tube, wherein the ring-shaped cleaning member is inserted into an outer diameter of the quartz tube so as to elastically adhere to an outer circumferential surface of the quartz tube receiving and protecting an ultraviolet lamp for an ultraviolet sterilizer therein. Therefore, the method for cleaning a quartz tube of an ultraviolet sterilizer can more exactly remove foreign substances over the entire outer circumferential surface of the quartz tube.

Description

Method for cleaning quartz tube of ultraviolet rays sterilizer

The present invention relates to an apparatus and method for cleaning the outer circumferential surface of a quartz tube used in an ultraviolet sterilizer that disinfects the water by irradiating ultraviolet rays to water to destroy and kill bacteria. In particular, the outer circumferential surface of the quartz tube is more effectively cleaned. It relates to a quartz tube cleaning apparatus and a cleaning method of an ultraviolet sterilizer, improved to be cleaned.

In places that treat water such as drinking water manufacturing facilities, sewage treatment plants, and aquaculture plants, ultraviolet sterilizers are often used to kill bacteria present in the water. In such an ultraviolet sterilizer, a transparent quartz tube is provided that receives and protects the ultraviolet lamp. If the ultraviolet sterilizer is used for a long time, the quartz tube is contaminated by foreign substances such as scale, sediment, and sediment. The UV transmission efficiency is reduced, and thus the treatment efficiency of UV disinfection and sterilization decreases. Accordingly, in order to prevent contamination of the quartz tube, the ultraviolet sterilizer is often provided with a quartz tube cleaning device that wipes and removes foreign matter adhered to the outer peripheral surface of the quartz tube. As an example of such a quartz tube cleaning device, a rubber cleaning ring elastically adhered to the outer circumferential surface of the quartz tube is moved by the maximum movable distance along any one of the longitudinal directions of the quartz tube, and then in the opposite direction. It is known that by performing the process of moving the maximum movable distance one or more times, foreign matter adhered to the outer circumferential surface of the quartz tube is wiped off by friction between the outer circumferential surface of the quartz tube and the cleaning ring (e.g., Patent Document 1).

By the way, in the reciprocating motion method as described above (a method in which the process of moving the washing ring as much as the maximum movable distance in one direction along the longitudinal direction of the quartz tube and then retreating the maximally movable distance in the opposite direction is repeated) When the foreign matter is removed by moving it, the foreign matter adhered to the outer peripheral surface of the quartz tube may not be effectively cleaned. This will be described in more detail as follows.

The frictional force between the outer circumferential surface of the quartz tube and the cleaning ring moving along the quartz tube is greatest at an initial point in time when the still cleaning ring starts to move, and the above-described frictional force decreases after the cleaning ring starts moving. Therefore, foreign matter very close to the stationary cleaning ring (cleaning ring before moving) can be efficiently removed by the large frictional force at the beginning of the movement of the cleaning ring, but far away from the stationary cleaning ring. Foreign matter in the place can be removed only when the washing ring moves relatively largely.Since the frictional force between the washing ring and the outer circumferential surface of the quartz tube at the point where the washing ring starts to move and moves a lot decreases, foreign matter at that location There are cases where the silver is difficult to clean.

Patent Document 1. Registered Patent Publication No. 10-1253322

The present invention has been devised in consideration of the above, and while moving the cleaning member elastically in close contact with the outer circumferential surface of the quartz tube by the maximum movable distance in one direction along the longitudinal direction of the quartz tube, the outer circumferential surface of the quartz tube An object of the present invention is to provide a quartz tube cleaning apparatus of an improved ultraviolet sterilizer so that foreign matter adhering to the surface can be more effectively removed.

Another object of the present invention is to prevent foreign matter adhering to the outer circumferential surface of the quartz tube while moving the cleaning member elastically in close contact with the outer circumferential surface of the quartz tube by the maximum movable distance in one direction along the longitudinal direction of the quartz tube. An object of the present invention is to provide an improved method for cleaning a quartz tube of an ultraviolet sterilizer so that it can be removed more effectively.

In order to achieve the above object, the quartz tube cleaning apparatus of the ultraviolet sterilizer according to the present invention is for cleaning the outer circumferential surface of the quartz tube that accommodates and protects the ultraviolet lamp for the ultraviolet sterilizer, and is inserted into the outer circumference of the quartz tube. A ring-shaped cleaning member that is elastically in close contact with the outer circumferential surface of the quartz tube and installed so as to be reciprocated along the longitudinal direction of the quartz tube, and the cleaning member at a first position on the one end side of the quartz tube and of the quartz tube. A driving unit for reciprocating movement along a longitudinal direction of the quartz tube between second positions on the other end side, the driving unit, when moving the cleaning member from the first position to the second position, It is configured to move to the second position while alternately repeating a forward movement moving toward the second position and a backward movement moving toward the first position by a distance shorter than the movement distance at the time of the forward movement. .

In addition, in order to achieve the above other object, the quartz tube cleaning method of the ultraviolet sterilizer according to the present invention is provided on the outer circumference of the quartz tube in elastic contact with the outer circumferential surface of the quartz tube that receives and protects the ultraviolet light sterilizer therein. Washing the outer circumferential surface of the quartz tube by reciprocating the inserted ring-shaped cleaning member along the longitudinal direction of the quartz tube between the first position on the one end side of the quartz tube and the second position on the other end side of the quartz tube As a method of, when moving the cleaning member from the first position to the second position, a forward movement moving toward the second position and a distance shorter than a movement distance at the time of the forward movement toward the first position The moving backward movement is alternately repeated many times to move to the second position.

According to the present invention, when the cleaning member moves in one direction on the outer circumferential surface of the quartz tube, the cleaning member moves reciprocating and reciprocating several times in a short section, so that foreign matter can be removed more reliably over the entire outer circumferential surface of the quartz tube.

These and other effects will be easily understood from the description of the embodiments of the present invention.

1 is a schematic cross-sectional view of an ultraviolet sterilizer equipped with a quartz tube cleaning apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view taken along line II-II of the ultraviolet sterilizer shown in FIG. 1.
3 is a schematic cross-sectional view taken along line III-III of the ultraviolet sterilizer shown in FIG. 2.
4 is a schematic exploded perspective view of the moving plate portion shown in FIGS. 1 to 3.
5 and 6 are views for explaining a process for cleaning a quartz tube, and FIG. 5 is a schematic cross-sectional view corresponding to FIG. 1, and FIG. 6 is an extract of a quartz tube and a cleaning member inserted into the quartz tube. It is a schematic diagram.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For reference, at least some of the parts shown in the drawings may be shown in a state in which scales or dimensions are appropriately exaggerated or reduced for convenience of understanding.

1 is a schematic cross-sectional view of an ultraviolet sterilizer having a quartz tube cleaning apparatus according to an embodiment of the present invention. In addition, FIGS. 2 and 3 are schematic cross-sectional views taken along line II-II and line III-III of the ultraviolet sterilizer shown in FIG. 1, respectively. 4 is a schematic exploded perspective view of the moving plate portion shown in FIGS. 1 to 3.

The ultraviolet sterilizer 1 shown in Figs. 1 to 4 is a so-called pipeline type ultraviolet sterilizer, and includes a pipe-shaped chamber 10 extending in a horizontal direction, and a plurality (in the illustrated example, four) arranged in the chamber 10. ) Of the ultraviolet lamp (20) is provided.

The chamber 10 has an inlet 11 through which water to be disinfected is introduced and an outlet 12 through which disinfected water is discharged, and both ends of the chamber 10 are closed by a closing plate 15, respectively. Has been. Each of the ultraviolet lamps 20 is accommodated and protected inside the transparent quartz tube 30. The ultraviolet lamp 20 and the quartz tube 30 are arranged to extend in the longitudinal direction R1 of the chamber, and are fixed to and supported by the closing plate 15 by a fixing member such as a socket (not shown). Reference numeral 16 is a cover that is coupled to the chamber 10 by a screw member (not shown) and serves to prevent the ends of the quartz tubes 30 from being exposed to the outside.

Water to be sterilized is introduced into the chamber 10 through the inlet 11, is irradiated from the ultraviolet lamp 20 and sterilized and sterilized by ultraviolet rays transmitted through the quartz tube, and then the chamber through the outlet 12 It will be discharged to the outside of (10).

The ultraviolet sterilizer 1 is also used in order to prevent the reduction of ultraviolet light transmission efficiency from the ultraviolet lamp 20 to water by attaching foreign substances such as scale, sediment, and sediment to the outer peripheral surface of the quartz tube 30 during use. It is equipped with a quartz tube cleaning device that wipes and removes foreign substances attached to the outer circumferential surface of (30).

As such a quartz tube cleaning apparatus, it includes a cleaning member 40 (see Figs. 2-4) and a driving unit.

The cleaning member 40 is provided for each quartz tube 30. Each washing member 40 is formed in a ring shape by a rubber material having elasticity, such as Teflon or fluorine rubber (for example, "VITON" (brand name)). The cleaning member 40 has an inner diameter slightly smaller than the outer diameter of the quartz tube 30, is fitted into the outer circumference of the quartz tube 30, and is elastically attached to the outer circumferential surface of the quartz tube 30. The cleaning members 40 are fixed to one moving plate 410 provided to be reciprocated along the longitudinal direction R1 of the quartz tube 30. In this example, each washing member 40 is a moving plate 420 by a fixing member 420 fixed to the moving plate 410 by screw members 409 while covering the washing member 40 410).

The drive unit reciprocates each cleaning member 40 between a first position (P1; see Fig. 5) on an arbitrary end side of the quartz tube 30 and a second position (P2; see Fig. 5) on the other end side of the quartz tube 30. It is designed to move. Here, the first position (P1) is a position when the washing member 40 is moved to the maximum in one direction, and the second position (P2) is the position when the washing member 40 is moved to the maximum in the other direction. It means the location of the time. The first position (P1) and the second position (P2) may be defined by a stopper (not shown) that prevents the washing member 40 from leaving the position by contacting the washing member 40, and will be described later. The driving unit may be set to a position to stop the movement of the cleaning member 40 in one direction and the other direction.

On the other hand, the driving unit is configured to move the cleaning member 40 in a unique manner different from the conventional method when moving the cleaning member 40 from the first position P1 to the second position P2. Specifically, the driving unit includes a forward movement that moves the cleaning member 40 toward the second position P2, and a backward movement toward the first position P1 by a distance shorter than the movement distance during the forward movement. It is configured to move to the second position P2 while alternately repeating the movement a plurality of times. In other words, when moving the cleaning member 40 from the first position (P1) to the second position (P2), the driving unit moves forward a number of times (moving toward the second position), and its advance. It is designed to move to the second position P2 while performing a plurality of reverse movements (moving toward the first position, and the distance of this backward movement is smaller than the distance of the forward movement) performed between movements.

This driving unit may be implemented in various forms, and in this example, it is configured to include a step motor 50, a screw shaft 60, a female screw member 70, and a control unit 59.

The step motor 50 is a motor that rotates at a specific angle or step and has an output shaft 51 capable of forward and reverse rotation. This step motor 50 is installed relatively fixed to the quartz tube 30 with the output shaft 51 disposed to extend in the longitudinal direction R1 of the quartz tube 30 (specifically, FIG. In the ultraviolet sterilizer shown in 1, it is fixed to the cover 16).

The screw shaft 60 is provided with a male thread on its outer circumferential surface, and is arranged parallel to the quartz tube 30. Both ends of the screw shaft 60 are rotatably supported with respect to the finish plate 15 by a bearing 65, and one end is fixed to the output shaft 51 of the step motor 50 through a coupling or the like. Therefore, when the output shaft 51 of the step motor 50 rotates, the screw shaft 60 also rotates.

The female screw member 70 is screw-fitted to the screw shaft 60, and is fixed to the moving plate 410 by the screw member 79, so that the screw shaft 60 is rotated when the screw shaft 60 is rotated. It is linearly moved on the screw shaft 60 along the longitudinal direction of.

The control unit 59 is for controlling the rotation direction and rotation angle of the output shaft 51 of the step motor 50 to correspond to the distance when the washing member 40 is moved forward and the distance when moved backward. will be. The control unit 59 may be implemented by, for example, a microcomputer or a combination of a motor driver and an Arduino.

On the other hand, since the ultraviolet sterilizer 1 is for disinfecting water, although not specifically described and illustrated, water leakage prevention treatment is appropriately performed in a portion where water leakage prevention is required by installation of a seal member or the like.

An example of a process of cleaning the quartz tube 30 by the quartz tube cleaning device provided in the ultraviolet sterilizer 1 configured as described above will be described as follows.

First, the step motor 50 is operated continuously or intermittently while the ultraviolet sterilizer 1 is operating, or at a specific point in time when it is determined that cleaning of the quartz tube 30 is necessary. The rotation direction and rotation speed of the output shaft 51 of the step motor 50 are controlled by the control unit 59 to correspond to the distance at the time of each forward movement of the quartz tube 30 and the distance at the time of each reverse movement. do. For example, the distance between the first position (P1) and the second position (P2) is 672 mm, and while the screw shaft 60 rotates once, the female screw member 70 screwed to the screw shaft 60 moves. The distance (that is, the moving plate 410 to which the female screw member 70 is fixed and the moving distance of the washing member 40 fixed to the moving plate 410) is 32 mm, and the forward movement of the washing member 40 ( When the moving distance to the second position) is 4 mm and the moving distance per time is 4 mm, and the movement distance per movement is 2 mm (moving toward the first position), the control unit 59 controls the output shaft 51 of the step motor 50. ) Is rotated at an angle of 45 degrees in one direction (the direction in which the cleaning member 40 is moved to the second position) and then rotated at an angle of 22.5 degrees in the other direction, and the cleaning member 40 is moved to the second position (P2). ), and then control the step motor 50 to return the cleaning member 40 back to the first position P1 (the cleaning member 40 adjusts the first position P1). The total time taken to arrive at the second location P2 while departing from the above process may be set, for example, about 80 seconds). This will be described in more detail with reference to the drawings as follows.

First, in a state in which the cleaning member 40 is in the first position P1 as shown by a solid line in FIGS. 5 and 6A, the step motor 50 is controlled by the control unit 59 The output shaft 51 rotates 45 degrees in one direction (the direction in which the cleaning member 40 moves to the second position), so that the screw shaft 60 fixed to the output shaft 51 of the step motor 50 rotates together. do. As a result, a force is applied to the female screw member 70 that is screwed to the screw shaft 60 in the direction toward the second position P2, and by the force, the female screw member 70 is moved to the moving plate 410 Together, they are moved 4mm toward the second position P2. As described above, while the female screw member 70 is moved toward the second position, the cleaning member 40 is shown as an imaginary line in FIG. 6 (a) and a solid line in FIG. 6 (b), It moves forward from the first position to a position A2 that is 4 mm away from the second position.

After the output shaft 51 rotates 45 degrees in one direction as described above, the step motor 50 is again controlled by the controller 59 so that the output shaft 51 immediately rotates by 22.5 degrees in the opposite direction. Accordingly, the screw shaft 60 is also rotated in a direction opposite to that of the forward movement. Contrary to the above, the cleaning member 40 is shown as an imaginary line in FIG. 6(b) and FIG. 6(c) As shown by the solid line, it moves backward to the position A1 that is 2 mm away toward the first position P1.

Subsequently, under the control of the control unit 59, the output shaft 51 of the step motor 50 is again rotated 45 degrees in the one direction, so that the cleaning member 40 is shown as an imaginary line in Fig. 6(c). As shown by the solid line in (d) of 6, after moving forward to the position (A3) that advances again by 4 mm toward the second position (P2), the output shaft 51 is rotated 22.5 degrees in the opposite direction to clean the cleaning member. As shown by an imaginary line in Fig. 6(d) and a solid line in Fig. 6(e), the 40 is moved backward by 2 mm to the position A2. And, under the control of the control unit 59, the output shaft 51 rotates 45 degrees in the one direction and 22.5 degrees in the opposite direction alternately and continuously repeats, and accordingly, the cleaning member 40 Likewise, the process of moving 4mm forward and then 2mm backward is repeated multiple times (in this example, 336 forward movements and 335 backward movements between the forward movements) and moves to the second position (P2).

In the above-described moving process (a plurality of forward movement processes and a backward movement process between the forward movements), the cleaning member 40 moving in a state elastically close to the outer circumferential surface of the quartz tube 30, the quartz tube The foreign matter attached to the outer peripheral surface of (30) is wiped off and removed.

As described above, after the cleaning member 40 is moved from the first position P1 to the second position P2, the control unit 59 controls the step motor 50 to control the cleaning member 40 It moves back to position P1. As described above, in the form in which the control unit 59 controls the step motor 50 to return the cleaning member 40 at the second position P2 to the first position P1, the cleaning member 40 is at the second position. It may be a type of control that continuously moves to the first position (P1) without moving in the (P2) direction, or otherwise, the second position (P2) from the first position (P1) of the cleaning member 40 Similar to the movement up to ), the movement toward the first position (P1) and movement toward the second position (P2) for a shorter distance than the movement toward the first position are alternately repeated multiple times. It can also be a form of control.

Thus, according to the present invention, while the cleaning member 40 is moved from the first position (P1) to the second position (P2), the forward movement toward the second position (P2), and when the forward movement It is designed to move to the second position P2 while alternately repeating the backward movement moving toward the first position P1 by a distance shorter than the movement distance of.

Therefore, the cleaning member 40 not only repeats the reciprocating stroke operation of a small distance a number of times during movement from the first position P1 to the second position P2, but also moves from the forward movement to the backward movement as described above. It stops momentarily at the time of transition and at the time of transition from backward movement to forward movement. Therefore, compared with the conventional technology that moves from the first position (P1) to the second position (P2) at a time, a large frictional force when starting the movement from the stationary state (foreign substances and cleaning members on the outer peripheral surface of the quartz tube 30) (40) It is possible to obtain a large frictional force between (40) many times, and the movement distance after starting a movement (forward movement or backward movement) from a standstill state is very small, so that the frictional force decreases during the movement. It will be significantly reduced. Therefore, while moving from the first position (P1) to the second position (P2), the cleaning member 40 can perform cleaning while maintaining high friction with foreign substances on the outer circumferential surface of the quartz tube 30, compared to the prior art. Therefore, the cleaning efficiency is increased.

Moreover, as in the present embodiment, when the moving distance of the washing member 40 when moving backward is 1/2 of the moving distance during the forward movement of the washing member 40 or greater than 1/2 (that is, 1 /2 or more), while the cleaning member 40 moves from the first position (P1) to the second position (P2), the outer peripheral surface of the quartz tube 30 is a short distance section (small section) within a short time. As the subsection is wiped three or more times while moving back and forth (about 4 to 5 times per second), the effect of scraping off foreign substances from the outer circumference of the quartz tube occurs, compared to simply wiping, The efficiency of removing foreign substances from the outer circumferential surface of the quartz tube 30 is increased.

In the present embodiment, it is shown that the ultraviolet lamp 20 and the quartz tube 30 are each provided with four, but is not limited thereto. For example, when the ultraviolet lamp 20 and the quartz tube 30 are five, , Or even 1-3 cases, the present invention can be applied.

In this embodiment, the forward movement distance of the cleaning member 40 is 4 mm and the reverse movement distance is 2 mm, the movement distance of the cleaning member 40 per rotation of the output shaft 51 is 32 mm, and the total distance of the cleaning section ( The distance between the first position and the second position) is 672mm, and the time taken for the cleaning member to arrive at the second position from the first position is about 80 seconds. The forward movement distance and the reverse movement distance, the movement distance of the cleaning member per one rotation of the output shaft, and the rotation angle of the step motor 50 and the output shaft 51 for forward movement and backward movement, etc. Of course, it can be changed and set in various ways.

The embodiments and modifications of the present invention have been described above, but the present invention is not limited to these embodiments or modifications, and various types of quartz tube cleaning apparatus for ultraviolet sterilizers within the scope not departing from the scope of the claims And a washing method may be implemented.

1...ultraviolet sterilizer 20...ultraviolet lamp
30...quartz tube 40...cleaning member
410...moving plate 50...step motor
51...output shaft 59...control
60...screw shaft 70...female thread member

Claims (4)

delete delete delete A ring-shaped cleaning member fitted to the outer circumference of the quartz tube in elastic contact with the outer circumferential surface of the quartz tube that accommodates and protects the ultraviolet lamp for the ultraviolet sterilizer is provided. A quartz tube cleaning method of an ultraviolet sterilizer, wherein the outer circumferential surface of the quartz tube is cleaned while reciprocating along the longitudinal direction of the quartz tube between a second position on the other end side,
When moving the cleaning member from the first position to the second position, a forward movement that moves toward the second position and a backward movement that moves toward the first position by a distance shorter than the movement distance at the time of the forward movement A quartz tube cleaning method of an ultraviolet sterilizer for moving to the second position while alternately repeating a plurality of times.

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