JP2015080732A - Water treatment system using ultraviolet light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment system that, when abnormality occurs in an ultraviolet treatment device, quickly responds to prevent water from flowing into a purified water storage part from the ultraviolet treatment device.SOLUTION: In a water treatment system, when abnormality detection means 20 detects abnormality of an ultraviolet treatment device 2, an emergency shut-off valve 3 is operated to shut off a first passage 13, and an emergency open valve 5 is operated to open a second passage 14, whereby water is made to flow from the ultraviolet treatment device 2 into a wastewater storage part 12 to prevent the water from flowing into a purified water storage part 11. The emergency shut-off valve 3 is a weight type shut-off valve that shuts off the first passage 13 by the weight of a weight, and the emergency open valve 5 is a spring type open valve that opens the second passage 14 by an elastic energizing force of a spring.

Description

  The present invention relates to a water treatment system that performs ultraviolet treatment of water using an ultraviolet treatment device.

In Japan, in March 2007, “Ministerial Ordinance to Revise Part of the Ministerial Ordinance for Establishing Technical Standards for Water Supply Facilities” was enacted to take measures against chlorine-resistant pathogenic organisms such as cryptosporidium in tap water. It was approved to use UV treatment equipment. Based on this, each local government is considering introducing an ultraviolet treatment device into the water treatment system of the water purification facility.
Conventionally, a water treatment system using ultraviolet rays has been proposed (see, for example, Patent Document 1).

  FIG. 13 shows an example of a water treatment system in which a conventional ultraviolet treatment apparatus is introduced. The water treatment system includes a raw water storage unit 1 that stores water before ultraviolet treatment, an ultraviolet treatment device 2 that performs ultraviolet treatment of water, and a purified water storage unit 11 that stores water after ultraviolet treatment.

  Water in the raw water storage unit 1 is sent to the ultraviolet treatment device 2 through the flow path 10 by the pump P. The ultraviolet treatment device 2 inactivates chlorine-resistant pathogenic organisms such as Cryptosporidium contained in water by irradiating ultraviolet rays from the ultraviolet lamp to the sent water. The water after the ultraviolet treatment is sent to the purified water storage section 11 through the flow path 13. And the water of the purified water storage part 11 is supplied to the distribution reservoir etc. in the downstream.

  In such a water treatment system using the ultraviolet treatment device 2, the ultraviolet treatment device 2 may fail for some reason. For example, ultraviolet rays may not be irradiated from the ultraviolet lamp. In such a case, water that has not been subjected to ultraviolet treatment, that is, water that contains chlorine-resistant pathogenic organisms that have not been inactivated, flows out into the purified water storage unit 11. Further, for example, the protective tube for protecting the ultraviolet lamp may be damaged. In such a case, a broken piece of the protective tube further flows out into the purified water storage unit 11 together with water.

JP 2009-082774 A

  Therefore, the problem to be solved by the present invention is to provide a water treatment system that responds quickly so that water from the ultraviolet treatment device does not flow to the purified water storage section when an abnormality occurs in the ultraviolet treatment device. is there.

In order to solve the above problems, a water treatment system according to the present invention is
An ultraviolet treatment device for ultraviolet treatment of water, an abnormality detection means for detecting an abnormality of the ultraviolet treatment device, a first flow path connected to the ultraviolet treatment device, and an ultraviolet treatment connected to the first flow path A purified water storage section storing water from the first flow path that has been subjected to ultraviolet treatment by the apparatus, a first valve as an emergency shut-off valve installed in the first flow path, and the ultraviolet light of the first flow path A second flow path branched from a portion between the processing device and the first valve; a drainage storage section connected to the second flow path for storing water from the second flow path; and the second A second valve as an emergency release valve installed in the flow path, and when the abnormality detection means detects an abnormality, the first valve is operated to shut off the first flow path, and the second valve Is activated to open the second flow path, so that To flow into the drainage reservoir, and control means to prevent flow to the water purifier reservoir,
The first valve is a weight type emergency shut-off valve that shuts off the first flow path by the weight of a weight, and the second valve is a spring type that opens the second flow path by an elastic biasing force of a spring. It is an emergency release valve.

Preferably, the first valve includes a first valve box installed in the first flow path, a first valve shaft rotatably supported by the first valve box, and rotation of the first valve shaft. A first valve body that rotates and shuts off and opens the first flow path, and a closed position that is provided so as to interlock with the first valve shaft, and that the first valve body blocks the first flow path. And a swing arm that can swing between the first valve body and an open position that opens the first flow path, and is attached to the swing arm, and the swing arm is moved to the closed position by weight. The weight to be biased, a first lock mechanism that locks the swing arm in the open position against gravity, and a first lock release mechanism that unlocks the swing arm by the first lock mechanism; With
The second valve is rotated by rotation of the second valve shaft, a second valve shaft installed in the second flow path, a second valve shaft rotatably supported by the second valve box, and the second valve shaft. A second valve body that blocks and opens the second flow path, a closed position that is provided so as to be interlocked with the second valve shaft, and in which the second valve body blocks the second flow path; A movable member capable of moving between an open position in which the two-valve body opens the second flow path, a spring for urging the movable member to the open position by an elastic urging force; and A second locking mechanism that locks against the elastic urging force of the second locking mechanism, and a second unlocking mechanism that unlocks the moving member by the second locking mechanism,
When the abnormality detecting means detects an abnormality, the control means operates the first lock release mechanism to release the lock of the swing arm, and rotates the first valve shaft by the weight of the weight. Thus, the first flow path is shut off, the second unlocking mechanism is operated to unlock the moving member, and the second valve shaft is rotated by the elastic biasing force of the spring. Open 2 flow paths.

Furthermore, in order to solve the said subject, the water treatment system which concerns on this invention is the following.
An ultraviolet treatment device for ultraviolet treatment of water, an abnormality detection means for detecting an abnormality of the ultraviolet treatment device, a first flow path connected to the ultraviolet treatment device, and an ultraviolet treatment connected to the first flow path A purified water storage unit storing water from the first flow path that has been subjected to ultraviolet treatment by the apparatus, a second flow path branched from the first flow path, and the second flow path connected to the second flow path. A drainage reservoir for storing water from the road, and a three-way ball valve installed at a branch point from the first flow path of the second flow path,
The three-way ball valve has a first state in which the ultraviolet treatment device communicates with the purified water storage unit and is not in communication with the waste water storage unit, and the ultraviolet treatment device is not in communication with the purified water storage unit, Switchable to a second state communicating with the reservoir, and
When the ultraviolet ray treatment device detects an abnormality, the three-way ball valve is switched from the first state to the second state so that water flows from the ultraviolet ray treatment device to the drainage reservoir, and the water purification reservoir Control means for preventing flow to
The three-way ball valve is a spring-type three-way ball valve that is switched from the first state to the second state by an elastic biasing force of a spring.

Preferably, the three-way ball valve is rotated by rotation of the valve shaft, the valve shaft installed at the branch point, the valve shaft rotatably supported by the valve box, and the first state and the A ball valve body for switching between a second state, a first position where the ball valve body forms the first state, the ball valve body being connected to the valve shaft; A movable member movable between a second position forming a state, the spring for elastically urging the movable member to the second position, and the movable member against the elastic urging force of the spring. A lock mechanism for locking in a first position; and a lock release mechanism for unlocking the moving member by the lock mechanism;
When the abnormality detecting means detects an abnormality, the control means operates the lock release mechanism to release the lock of the moving member, rotates the valve shaft by an elastic biasing force of the spring, and The three-way ball valve is switched from the first state to the second state.

  As described above, the water treatment system of the present invention can be operated by operating an emergency shut-off valve and an emergency release valve or operating a three-way ball valve when an abnormality occurs in the ultraviolet treatment apparatus. The water is discharged to the drainage reservoir and is not allowed to flow to the purified water reservoir. Thereby, it is prevented that the chlorine-resistant pathogenic organisms are not inactivated and flow out to the purified water storage section, and fragments of the protection tube of the ultraviolet lamp of the ultraviolet processing apparatus are prevented from flowing out to the purified water storage section.

  Furthermore, in the water treatment system of the present invention, the emergency shut-off valve is a weight type that shuts off the flow path using the weight of the weight, and the emergency release valve opens the flow path using the elastic biasing force of the spring. It is a spring type. The three-way ball valve is a spring type that switches the flow path by using the elastic biasing force of the spring. According to this configuration, for example, the flow path can be blocked, opened, or switched more quickly than an electric motor that blocks, opens, or switches, whereby water treatment The system can respond quickly when an abnormality occurs in the UV treatment apparatus.

It is a figure showing a schematic structure of a 1st embodiment of a water treatment system. It is a figure which shows schematic structure of the ultraviolet-ray processing apparatus and abnormality detection means with which the water treatment system was equipped. It is a front view of the emergency shut-off valve with which the water treatment system was equipped. It is a side view of the emergency shut-off valve of FIG. It is a front view of the lock mechanism (emergency release valve and arm lock mechanism of a three-way ball valve) of an emergency shut-off valve, and the lock release mechanism (emergency release valve and lock release mechanism of a three-way ball valve) of an emergency shut-off valve. It is a front view of the emergency release valve with which the water treatment system was equipped. It is a side view of the emergency shut-off valve of FIG. FIG. 8A is a cross-sectional view when the moving bar of the spring mechanism is in the closed position (first position), and FIG. 8B is a cross-sectional view when the moving bar is in the open position (second position). 9A is a side view when the moving bar of the spring mechanism is in the closed position (first position), and FIG. 9B is a side view when the moving bar is in the open position (second position). It is a figure which shows schematic structure of 2nd Embodiment of a water treatment system. It is a front view of the three-way ball valve with which the water treatment system was equipped. It is a side view of the three-way ball valve of FIG. It is a figure which shows the schematic structure of the conventional water treatment system.

  Hereinafter, a water treatment system using ultraviolet rays according to the present invention will be described with reference to the drawings. The water treatment system is installed in a tap water purification facility, for example.

[First embodiment]
[overall structure]
FIG. 1 shows a schematic configuration of a water treatment system. The water treatment system includes a raw water storage unit 1 in which raw water that is water before ultraviolet treatment is stored, and a plurality of ultraviolet treatment devices 2 that perform ultraviolet treatment on the raw water. The raw water reservoir 1 and each ultraviolet treatment device 2 are connected to the flow path 10.

  Each ultraviolet treatment device 2 is provided with an abnormality detection means 20 that detects that an abnormality has occurred in the ultraviolet treatment device 2. The configurations of the ultraviolet treatment device 2 and the abnormality detection means 20 will be described in detail below.

  Furthermore, a purified water storage unit 11 that stores purified water that is water after the ultraviolet treatment and a drainage storage unit 12 that stores water from the ultraviolet treatment device 2 when an abnormality occurs in the ultraviolet treatment device 2 are provided. ing. Each ultraviolet treatment device 2 and the purified water storage unit 11 are connected to a flow path 13 (first flow path), and a weight-type emergency shut-off valve 3 (first valve) is installed in the flow path 13. ing. A flow path 14 (second flow path) is connected to the flow path 13 and branches from the flow path 13. The flow path 14 is branched from a portion of the flow path 13 between the ultraviolet treatment device 2 and the emergency shut-off valve 3. The drainage reservoir 12 is connected to the flow path 14. A spring-type emergency release valve 5 is installed in the flow path 14. The flow paths 10, 13, and 14 are configured by pipes having a predetermined diameter.

  Furthermore, a control panel 15 (control means) is provided for operating the emergency shut-off valve 3 and the emergency release valve 5 when the abnormality detection means 20 detects an abnormality.

[UV treatment equipment]
As shown in FIG. 2, the ultraviolet treatment apparatus 2 includes a treatment tank 23 having an inlet 21 and an outlet 22, and a plurality of ultraviolet lamps 24 are installed in the treatment layer 23. Each ultraviolet lamp 24 is covered and protected by a protective tube 25. The ultraviolet lamp 24 receives power from the power supply unit 26 and irradiates ultraviolet rays. Raw water is introduced into the treatment layer 23 from the flow path 10 through the inlet 21. While the raw water is moved from the inlet 21 to the outlet 22, the raw water receives ultraviolet rays emitted from the ultraviolet lamp 24, thereby inactivating microorganisms such as chlorine-resistant pathogenic organisms contained in the raw water. The raw water subjected to the ultraviolet treatment is sent from the outlet 22 to the flow path 13 as purified water.

[Abnormality detection means]
The abnormality detection means 20 detects an abnormality of the ultraviolet ray processing apparatus 2 such as a failure and breakage of the ultraviolet lamp 24 and a breakage of the protective tube 25. The abnormality detection means 20 is a determination unit 27 that determines whether or not an abnormality has occurred in the ultraviolet ray processing apparatus 2 and an intensity sensor that is provided for each ultraviolet lamp 24 and measures the intensity of ultraviolet rays emitted from the ultraviolet lamp 24. 28. The intensity sensor 28 is installed in the processing layer 23.

  If the ultraviolet lamp 24 fails or breaks, the ultraviolet lamp 24 does not irradiate the ultraviolet light, or the intensity of the irradiated ultraviolet light decreases. Moreover, the intensity | strength of the ultraviolet-ray which raw | natural water receives also when dirt adheres to the protective tube 25 falls. Therefore, the determination unit 27 determines that the ultraviolet ray processing apparatus 2 is not abnormal if the intensity measured by the intensity sensor 28 is equal to or higher than a preset reference value, and if the measured intensity is less than the reference value, the ultraviolet ray processing is performed. It is determined that the device 2 is abnormal.

  Further, the determination unit 27 includes measurement means (an ammeter, a voltmeter, etc.) (not shown) that measures the current or voltage of each ultraviolet lamp 24. When the ultraviolet lamp 24 fails or breaks, the measured current and voltage change greatly. When the protective tube 25 is broken, water comes into contact with the surface of the ultraviolet lamp 24 and the temperature of the ultraviolet lamp 24 is lowered. As a result, the measured current and voltage are greatly changed. Further, even when water leakage or a short circuit occurs due to breakage of the protective tube 25, the measured current and voltage change greatly. Therefore, the determination unit 27 determines whether or not the ultraviolet ray processing apparatus 2 is abnormal based on a change in the current or voltage being measured.

  When the determination unit 27 detects an abnormality of the ultraviolet ray processing apparatus 2 by any of the above, the determination unit 27 sends a signal indicating that an abnormality has occurred to the control panel 15 (FIG. 1).

[Emergency shut-off valve]
The emergency shut-off valve 3 is a weight type that urgently shuts off the flow path 13 (first flow path) (FIG. 1) by the weight of the weight. As shown in FIG. 3, the emergency shutoff valve 3 includes a valve box 30 (first valve box) installed in the flow path 13. The interior of the valve box 30 forms part of the flow path 13. A valve shaft 31 (first valve shaft) is rotatably supported by the valve box 30 and penetrates the inside and outside of the valve box 30. A valve body 32 (first valve body) attached to the valve shaft 31 is arranged inside the valve box 30. The valve body 32 is a butterfly valve, and is rotated by the rotation of the valve shaft 31 to contact the valve seat formed inside the valve box 30 to block the flow path 13 and to flow away from the valve seat. The road 13 is opened. FIG. 3 shows a state in which the valve body 32 opens the flow path 13.

  As shown in the side view of FIG. 4, the emergency shut-off valve 3 includes a swing arm 34 to which a weight 33 is attached. One end of the swing arm 34 is attached to the valve shaft 31 and interlocks with the rotation of the valve shaft 31 to swing between a position indicated by a solid line and a position indicated by a one-dot chain line. When the swing arm 34 is at the solid line position, the valve element 32 opens the flow path 13 as shown in FIG. Hereinafter, the position of the swing arm 34 indicated by the solid line is referred to as an open position. When the swing arm 34 swings to the one-dot chain line position regulated by the stopper 35, the valve shaft 31 rotates in conjunction with this, whereby the valve body 32 rotates in the closing direction and the flow path 13 is blocked. To do. Hereinafter, the position of the swing arm 34 indicated by the one-dot chain line is referred to as a closed position.

  The weight 33 on the other end side of the swing arm 34 biases the swing arm 34 from the open position to the closed position by its weight. That is, the weight 33 urges the valve body 32 in the closing direction that blocks the flow path 13. The swing arm 34 tries to swing from the open position to the closed position by gravity (that is, the weight of the swing arm 34 itself and the weight 33), and a lock mechanism 38 (first lock mechanism) described later is used. Is locked in the open position.

  The swing arm 34 is provided with an auxiliary arm 36. One end of the auxiliary arm 36 is attached to the rotary shaft 37 and swings around the rotary shaft 37. The rotation shaft 37 is parallel to the valve shaft 31 and is provided at a position away from the valve shaft 31. A weight 33 is attached to the other end of the auxiliary arm 36. A moving hole 34a extending in the length direction of the oscillating arm 34 is formed on the other end side of the oscillating arm 34, and the weight 33 is movable along the moving hole 34a.

  As shown by the solid line in FIG. 4, when the swing arm 34 is in the open position, the weight 33 is positioned at the end of the moving hole 34a close to the valve shaft 31. By bringing the weight 33 close to the valve shaft 31, the moment around the valve shaft 31 due to the weight of the weight 33 is reduced, thereby reducing the force with which the lock mechanism 38 described later holds the swing arm 34 in the open position. .

  When the swing arm 34 swings to the closed position due to gravity and rotates the valve body 32 in the closing direction, the auxiliary arm 36 swings around the rotation shaft 37 different from the valve shaft 31, thereby causing the weight 33. Is moved along the moving hole 34 a and separated from the valve shaft 31. That is, the auxiliary arm 36 increases the moment around the valve shaft 31 due to the weight of the weight 33. When the swing arm 34 is located at the closed position and the valve body 32 blocks the flow path 13, the weight 33 moves to the end portion away from the valve shaft 31 of the movement hole 34a. The force which the valve body 32 interrupts | blocks the flow path 13 is increased.

  The lock mechanism 38 locks the swing arm 34 that is about to swing to the closed position by gravity in the open position. The lock mechanism 38 includes a hook 39 attached to the swing arm 34 and a lock plate 40 that locks the hook 39.

  A front view of the locking mechanism 38 is shown in FIG. 5A. The lock plate 40 is rotatably supported by the support shaft 40a. The lock plate 40 is formed with a locking notch 41 into which the hook 39 is inserted. A lock pin 42 is provided to restrict the rotation of the lock plate 40, and the lock pin 42 is fitted in a lock hole 43 formed in the lock plate 40.

When the swing arm 34 is in the open position, the hook 39 of the swing arm 34 is inserted into the locking notch 41 as shown in FIGS. 5A and 5B. The swing arm 34 tries to swing to the closed position by gravity, but is held at the open position by the hook 39 being locked to the locking notch 41. At this time, the weights of the weight 33 and the swing arm 34 act on the lock plate 40 and try to rotate the lock plate 40. However, since the lock pin 42 is fitted in the lock hole 43, Rotation is regulated. Therefore, the swing arm 34 does not swing to the closed position.
In this way, the lock mechanism 38 locks the swing arm 34 in the open position against gravity, whereby the state in which the valve body 32 opens the flow path 13 is maintained.

  Further, as shown in FIG. 5A, the emergency shut-off valve 3 includes an unlock mechanism 44 (first unlock mechanism) that unlocks the swing arm 34 by the lock mechanism 38. The lock release mechanism 44 includes a lock arm 45 that supports the lock pin 43 described above, a lock release hole 46 formed in the lock plate 40, and an electromagnetic solenoid 47.

  The lock arm 45 includes a first lock arm 451, a second lock arm 452, and a third lock arm 453. The first lock arm 451 is rotatably supported by the support shaft 45a, the second lock arm 452 is rotatably supported by the support shaft 45b, and the third lock arm 453 includes the first and second lock arms 451, 452 is connected. The aforementioned lock pin 42 is attached to the second lock arm 452.

  The lock release hole 46 has an arc shape with the support shaft 40a as the center. The lock hole 43 and the lock release hole 46 communicate with each other, and the lock hole 43 extends from one end of the lock release hole 46 in the radial direction of a circle centering on the support shaft 40a.

  The electromagnetic solenoid 47 includes a housing 470 in which an electromagnetic coil or the like is accommodated, and a movable iron core 471 that moves linearly back and forth by energization of the electromagnetic coil and interruption of the energization. The electromagnetic solenoid 47 is disposed so that the moving and retracting direction of the movable iron core 471 is up and down, and the movable iron core 471 in the retracted position faces one end of the first lock arm 451. The electromagnetic solenoid 47 is connected to the control panel 15 described above.

  When the movable iron core 471 moves forward, one end of the first lock arm 451 is pushed down, and the first lock arm 451 is rotated around the support 45a. The third lock arm 453 connected to the other end of the first lock arm 451 is interlocked with this rotation to push up one end of the second lock arm 452 and rotate the second lock arm 452 around the support 45b. As a result, the lock pin 42 of the second lock arm 452 is detached from the lock hole 43 and moved to the lock release hole 46.

  When the lock pin 42 is removed from the lock hole 43, the rotation restriction of the lock plate 40 is released, and as a result, the hook 39 is released from the engagement notch 41 of the lock plate 40. That is, the rocking arm 34 is unlocked by the lock mechanism 38.

  When the lock of the swing arm 34 is released, the swing arm 34 starts swinging to the closed position by gravity. At this time, the hook 39 attached to the swing arm 34 rotates the lock plate 40 in one direction (see arrows in FIGS. 5A and 5B) and from the locking notch 41 of the rotating lock plate 40. Exit (see FIG. 5C). When the lock plate 40 rotates, the lock pin 42 moves relative to the lock release hole 46, and the lock plate 40 rotates until the lock pin 42 contacts the end of the lock release hole 46 (FIG. 5C). reference).

  As described above, when the lock release mechanism 44 unlocks the swing arm 34, the swing arm 34 is quickly swung to the closed position by the weight 33, as shown by the one-dot chain line in FIG. 4. Then, the valve shaft 31 rotates in conjunction with this swinging, whereby the valve body 32 rotates in the closing direction to urgently shut off the flow path 13.

  When the emergency shutoff valve 3 shuts off the flow path 13 and then operates the handle 48 shown in FIG. 3 to rotate the valve shaft 31, the swing arm 34 is swung from the closed position to the open position. Can do. At this time, the hook 39 of the swing arm 34 is inserted into the locking notch 41 of the lock plate 40 in the state shown in FIG. 5C and the lock plate 40 is rotated in the other direction. The lock pin 42 moves relative to the lock release hole 46 due to the rotation of the lock plate 44, fits into the lock hole 43 as shown in FIGS. 5A and 5B, and restricts the rotation of the lock plate 40 again. It is completely inserted into the notch 41 and locked again. That is, by the rotation of the handle 48, the lock mechanism 38 locks the swing arm 34 in the open position, and the valve body 32 returns to the state in which the flow path 13 is opened.

  As shown in FIG. 4, the emergency shut-off valve 3 includes a shock absorber 49 for reducing an impact when the valve body 32 rotates in the closing direction.

[Emergency release valve]
The emergency release valve 5 is a spring type that opens the flow path 14 (second flow path) (FIG. 1) urgently by the elastic biasing force of the spring. As shown in FIG. 6, the emergency release valve 5 includes a valve box 50 (second valve box) installed in the flow path 14. The interior of the valve box 50 forms part of the flow path 14. A valve shaft 51 (second valve shaft) is rotatably supported by the valve box 50 and penetrates the inside and outside of the valve box 50. A valve body 52 (second valve body) attached to the valve shaft 51 is disposed inside the valve box 50. The valve body 52 is a butterfly valve, and is rotated by the rotation of the valve shaft 51 to abut against the valve seat formed inside the valve box 50 to block the flow path 14 and to flow away from the valve seat. The path 14 is opened. FIG. 6 shows a state in which the valve body 52 blocks the flow path 14.

  As shown in the side view of FIG. 7, the emergency release valve 5 includes a spring mechanism 53 connected to the valve shaft 51 in order to rotate the valve shaft 51. FIG. 8 shows a partial cross-sectional side view of the spring mechanism 53. The spring mechanism 53 includes a spring 55 housed in the housing 54 and a moving bar 56 (moving member) partially inserted into the housing 54. As shown in FIG. 8A, the spring 55 is a compression spring, and is arranged so that the compression direction thereof coincides with the length direction of the moving bar 56. The moving bar 56 is inserted into the housing 54 so as to be movable in its length direction. A sliding member 57 that slides in the housing 54 is attached to one end of the moving bar 56, and the spring 55 is sandwiched between the sliding member 57 and the inner wall on one end side of the housing 54.

  In order to connect the moving bar 56 and the valve shaft 51, a connecting pin 58 is attached to the moving bar 56, a connecting piece 59 is attached to the valve shaft 51, and the connecting pin 58 is formed on the connecting piece 59. It is inserted into the notch 60. As shown in FIGS. 8A and 8B, the connecting piece 59 rotates as the valve shaft 51 rotates, so that the connecting pin 58 fitted in the notch 60 moves, whereby the moving bar 56 moves in the length direction. . Further, the connecting pin 58 is moved along with the movement of the moving bar 56 in the length direction, thereby rotating the connecting piece 59 and thereby rotating the valve shaft 51. Thus, the rotation of the valve shaft 51 and the movement of the moving bar 56, that is, the rotation of the valve body 52 and the movement of the moving bar 56 are interlocked.

  When the moving bar 56 is retracted as shown in FIG. 8A, the valve body 52 attached to the valve shaft 51 blocks the flow path 14. Hereinafter, the position of the moving bar 56 in FIG. 8A is referred to as a closed position. When the moving bar 56 advances as shown in FIG. 8B, the valve body 52 opens the flow path 14. Hereinafter, the position of the moving bar 56 in FIG. 8B is referred to as an open position.

  As shown in FIG. 8A, when the moving bar 56 is in the closed position, the sliding member 57 slides to the central portion in the housing 54, and the spring 55 is located on one end side of the sliding member 57 and the housing 54. It is sandwiched and compressed by the inner wall. The compressed spring 55 urges the moving bar 56 to the open position by the elastic urging force, that is, urges the valve body 52 in the opening direction to open the flow path 14. However, normally, the lock mechanism 61 (second lock mechanism) (FIG. 7) described below locks the moving bar 56 in the closed position against the elastic biasing force.

  As shown in FIG. 7, the emergency release valve 5 includes a lock mechanism 61 that locks the moving bar 56 in the closed position. The lock mechanism 61 includes a swing arm 63 that can swing around a rotation shaft 62. The swing arm 63 can swing to a position indicated by a one-dot chain line in FIG. The rotating shaft 62 is parallel to the valve shaft 51 and is provided at a position away from the valve shaft 51.

  FIG. 9 shows a part of the configuration of the lock mechanism 61. As shown in FIG. 9A, a notch 64 is formed in the swing arm 63. When the moving bar 56 is in the closed position, a lock pin 65 provided at the tip of the moving bar 56 is fitted in the notch 64. . As described above, since the moving bar 56 in the closed position is urged by the elastic urging force of the spring 55, the lock pin 65 fitted in the notch 64 will oscillate the oscillating arm 63. And

However, as shown in FIGS. 6 and 7, the lock mechanism 61 includes an arm lock mechanism 66 that locks the swing arm 63, and maintains a state in which the lock pin 65 is fitted in the notch 64. The arm lock mechanism 66 has the same configuration as the lock mechanism 38 of the emergency shut-off valve 3 shown in FIG. 5A. Therefore, the same components are denoted by the same reference numerals, and description thereof is omitted as much as possible.
That is, as shown in FIG. 5A, the arm lock mechanism 66 includes a hook 39 attached to the swing arm 63, a lock plate 40 that locks the hook 39, a lock pin 42 inserted into the lock hole 43 of the lock plate 40, and the like. Become. As shown in FIG. 5A, the lock pin 42 is fitted in the lock hole 43 to restrict the rotation of the lock plate 40, and the hook 39 of the swing arm 63 is inserted into the locking notch 41 of the lock plate 40. By being stopped, the swing arm 63 is locked so as not to swing.

Referring to FIG. 9A again, the swing arm 63 is locked so as not to swing as described above, and the lock pin 65 at the tip of the moving bar 56 is fitted in the notch 64 of the swing arm 63. Thus, the moving bar 56 is restricted from moving to the open position (FIG. 8B) by the elastic biasing force of the spring 55.
Thus, the lock mechanism 61 locks the moving bar 56 in the closed position against the elastic biasing force of the spring 55, thereby holding the state where the valve body 52 blocks the flow path 14.

Furthermore, the emergency release valve 5 includes a lock release mechanism 67 (second lock release mechanism) for releasing the lock of the moving bar 56 by the lock mechanism 61 as shown in FIG. Since the unlocking mechanism 67 of the emergency release valve 5 has the same configuration as the unlocking mechanism 44 of the emergency shut-off valve 3 in FIG. 5A, the same components are denoted by the same reference numerals, and description thereof is omitted as much as possible. To do.
That is, the lock release mechanism 67 includes a lock arm 45, a lock release hole 46, and an electromagnetic solenoid 47 as shown in FIGS.

When the electromagnetic solenoid 47 of the unlocking mechanism 67 of the emergency release valve 5 is operated, the swing arm 63 is unlocked in the same manner as described above, whereby the movable bar 56 is unlocked.
The moving bar 56 moves from the closed position to the open position by the elastic biasing force of the spring 55 as shown in FIG. At this time, as shown in FIG. 9B, the lock pin 65 at the tip of the moving bar 56 swings out the swing arm 63 and comes out of the notch 64.
Thus, the unlocking mechanism 67 releases the lock of the moving bar 56, so that the moving bar 56 is quickly moved from the closed position to the open position by the elastic biasing force of the spring 55. Then, in conjunction with this movement, the valve shaft 51 rotates, whereby the valve body 52 rotates in the opening direction to open the flow path 14 urgently.

The emergency release valve 5 includes a handle 68 that rotates the valve shaft 51. When the moving bar 56 is in the open position as shown in FIG. 9B, when the handle 68 is operated to rotate the valve shaft 51, the moving bar 56 moves toward the closed position (FIG. 9A). At this time, the lock pin 65 comes into contact with the side surface 63a of the swing arm 63 to swing the swing arm 63, and again fits into the notch 64 as shown in FIG. 9A. The spring 55 is compressed again by the movement of the moving bar 56 to the closed position. Further, when the swing arm 63 swings, the hook 39 attached to the swing arm 63 fits into the locking notch 41 of the lock plate 40 and is locked again.
That is, by operating the handle 68, the moving bar 56 is locked in the closed position by the lock mechanism 61, and the valve body 52 returns to the state where the flow path 14 is blocked.

[Description of water treatment system operation]
Referring to FIG. 1 again, the control panel 15 is connected to the abnormality detection means 20 (specifically, the determination unit 27 in FIG. 2), and the emergency shutoff valve 3 (specifically, the unlocking mechanism in FIG. 3). 44 is connected to the emergency release valve 5 (specifically, the electromagnetic solenoid 47 of the unlocking mechanism 67 in FIG. 6).

  When the abnormality detection means 20 has not detected an abnormality in the ultraviolet processing apparatus 2, the control panel 15 opens the emergency shut-off valve 3 to open the flow path 13, and closes the emergency open valve 5 to shut off the flow path 14. ing. And a water treatment system sends the water of the raw | natural water storage part 1 to each ultraviolet-ray processing apparatus 2 through the flow path 10 with the pump P. FIG. At this time, water passes through the check valve 16 and the strainer 17. And a water treatment system inactivates chlorine-resistant pathogenic organisms, such as Cryptosporidium in water, by ultraviolet-treating water with the ultraviolet-ray processing apparatus 2. FIG. The water treatment system sends the ultraviolet-treated water to the purified water storage unit 11 through the flow path 13. The water stored in the purified water storage unit 11 is then supplied downstream.

  When the abnormality detection means 20 detects that an abnormality has occurred in any one of the ultraviolet ray processing apparatuses 2, the control panel 15 operates the electromagnetic solenoid 47 of the lock release mechanism 44 of the emergency shut-off valve 3, and the weight 33 as described above. The flow path 13 is urgently shut off using the gravity of. At the same time, the control panel 15 activates the electromagnetic solenoid 47 of the unlocking mechanism 67 of the emergency release valve 5 to urgently open the flow path 14 using the elastic biasing force of the spring 55 as described above. Thereby, the water sent from the ultraviolet treatment device 2 is introduced into the flow path 14 and discharged to the drainage storage unit 12, and is prevented from flowing to the purified water storage unit 11.

  Due to the above configuration, the ultraviolet lamp 24 and the protective tube 25 of the ultraviolet treatment device 2 break down and break down, so that water containing chlorine-free pathogenic organisms that are not inactivated and broken pieces such as the damaged protective tube 25 are generated. It is prevented that it flows out to the purified water storage part 11.

  When the emergency shut-off valve 3 rotates the valve shaft 31 to shut off the flow path 13, when the emergency release valve 5 rotates the valve shaft 51 to open the flow path 14, a very large initial torque is required. Become. In the case of the configuration in which the valve shafts 31 and 51 are rotated by an electric motor for the emergency shutoff of the flow path 13 and the emergency opening of the flow path 14, it takes a very long time to generate the large initial torque. . That is, in the configuration using the electric motor, it becomes a water treatment system with poor responsiveness that takes a very long time to detect the abnormality of the ultraviolet treatment device 2 and then shut off the flow path 13 and open the flow path 14. . In such a water treatment system, when the ultraviolet ray treatment apparatus 2 is abnormal, water including chlorine-resistant pathogenic organisms that are not inactivated and debris of the protective tube 25 is reliably prevented from flowing into the purified water storage unit 11. In order to prevent this, the length of the flow path 13 from the ultraviolet treatment device 2 to the emergency shut-off valve 3 must be set very long, resulting in a problem that the water treatment system is enlarged.

  In contrast, in the water treatment system of the present invention, the emergency shut-off valve 3 rotates the valve shaft 31 using the gravity of the weight 33 to shut off the flow path 13 and the emergency release valve 5 is compressed spring 55. The flow path 14 is opened by rotating the valve shaft 51 using the elastic biasing force. According to this configuration, in the emergency shut-off valve 3, the weight of the weight 33 acts on the valve shaft 31 at the moment when the lock release mechanism 44 is operated, and a large initial torque necessary to shut off the flow path 13 is generated. It can be generated instantly. In the emergency release valve 5, at the moment when the lock release mechanism 67 is operated, the elastic biasing force of the spring 55 acts on the valve shaft 51, and a large initial torque necessary to open the flow path 14 is instantaneously generated. Can be generated.

  That is, in the water treatment system using the weight-type emergency shut-off valve 3 and the spring-type emergency release valve 5, it is possible to respond quickly when an abnormality occurs in the ultraviolet treatment device 2. And because of the speed of the response, even if the length of the flow path 13 from the ultraviolet treatment device 2 to the emergency shut-off valve 3 is set short, chlorine-resistant pathogenic organisms that are not inactivated and fragments of the protective tube 25 are removed. Outflow of the contained water to the purified water storage unit 11 can be reliably prevented. Therefore, it contributes to miniaturization of the water treatment system.

[Second Embodiment]
[overall structure]
FIG. 10 shows a second embodiment of the present invention. 10, the same components as those in the embodiment of FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted as much as possible.
In this embodiment, a three-way ball valve 7 is used instead of the emergency shut-off valve 3 and the emergency release valve 5 of FIG. The three-way ball valve 7 is installed at a branch point of a flow path 14 (second flow path) branched from the flow path 13 (first flow path).

[3-way ball valve]
FIG. 11 shows a front view of the three-way ball valve 7, and FIG. 12 shows a side view of the three-way ball valve 7. The three-way ball valve 7 includes a valve box 70 installed at the branch point. The inside of the valve box 70 constitutes a part of the flow paths 13 and 14. The valve box 70 includes one inflow port 71 and two outflow ports 72a and 72b. A valve shaft 73 (see FIG. 12) is rotatably supported by the valve box 70 and penetrates the inside and outside of the valve box 70. A ball valve body 74 attached to the valve shaft 73 is disposed inside the valve box 70. The ball valve body 74 has a flow passage (not shown).

  The inflow port 71 is connected to the upstream side portion of the flow path 13 of FIG. An outflow port 72 a provided on the back side in FIG. 11 is connected to a downstream portion of the flow path 13. An outflow port 72 b provided on the front side of FIG. 11 is connected to the flow path 14. As the ball valve body 74 is rotated by the rotation of the valve shaft 73, the inflow port 71 and the outflow port 72a communicate with each other through the flow path of the ball valve body 74, and the inflow port 71 and the outflow port 72b do not communicate with each other. The state is switched to the state where the inflow port 71 and the outflow port 72a do not communicate with each other and the inflow port 71 and the outflow port 72b communicate with each other through the flow path. That is, the rotation of the ball valve body 74 causes the ultraviolet treatment device 2 of FIG. 10 to communicate with the purified water storage unit 11 and not communicate with the drainage storage unit 12 (hereinafter referred to as the first state), and the ultraviolet treatment device 2. Is not in communication with the purified water storage unit 11 and is switched to a state (hereinafter referred to as a second state) in communication with the drainage storage unit 12.

Further, the three-way ball valve 7 includes a spring mechanism 75 connected to the valve shaft 73 in order to rotate the valve shaft 73. Since the spring mechanism 75 of the three-way ball valve 7 has the same configuration as the spring mechanism 53 of the emergency release valve 5 of FIGS. 6 to 9, the same components are denoted by the same reference numerals and can be described. Omitted as much as possible.
That is, as shown in FIGS. 8 and 12, the spring mechanism 75 is directly movable in the length direction of the spring 55 accommodated in the housing 54, and the valve shaft 73 is rotated by the connecting pin 58 and the connecting piece 59. A moving bar 56 (moving member) that moves in conjunction with the moving bar 56 is provided.

As shown in FIG. 8A, when the moving bar 56 is retracted and the spring 55 is compressed, the ball valve body 74 is in the first state, that is, the ultraviolet treatment device 2 communicates with the purified water storage unit 11 and the drainage storage unit 12. The state which is not connected with is formed. Hereinafter, the position of the moving bar 56 in FIG. 8A is referred to as a first position.
As shown in FIG. 8B, when the moving bar 56 goes straight and the compression of the spring 55 is released, the ball valve body 74 is in the second state, that is, the ultraviolet ray treatment device 2 is not in communication with the purified water storage unit 11 and drained. A state of communicating with the storage unit 12 is formed. Hereinafter, the position of the moving bar 56 in FIG. 8B is referred to as a second position.
As shown in FIG. 8A, when the moving bar 56 is in the first position, the compressed spring 55 biases the moving bar 56 to the second position (FIG. 8B) by its elastic biasing force.

The three-way ball valve 7 includes a lock mechanism 76 that locks the moving bar 56 in the first position against the elastic biasing force of the spring 55 as shown in FIGS. Since the lock mechanism 76 of the three-way ball valve 7 has the same configuration as the lock mechanism 61 of the emergency release valve 5 of FIGS. 6, 7, and 9, the same components are denoted by the same reference numerals, The description will be omitted as much as possible.
That is, as shown in FIGS. 9, 11, and 12, the lock mechanism 76 of the three-way ball valve 7 swings around the rotation shaft 62 and has a swing arm 63 in which a notch 64 is formed, and the swing arm 63. Arm locking mechanism 66 etc. for locking the swinging motion. The arm lock mechanism 66 includes a hook 39 attached to the swing arm 63, a lock plate 40 that locks the hook 39, a lock pin 42 that restricts rotation of the lock plate, and the like.

Then, as shown in FIGS. 9A and 12, the lock bar 65 at the tip of the moving bar 56 is fitted into the notch 64 of the swing arm 63 whose swing is locked by the arm lock mechanism 66, so that the swing bar 56 is restricted from moving from the first position to the second position by the elastic biasing force of the spring 55.
Thus, the lock mechanism 76 locks the moving bar 56 in the first position against the elastic biasing force of the spring 55, whereby the first state, that is, the ultraviolet treatment device 2 communicates with the purified water storage unit 11. The state not communicating with the drainage storage unit 12 is maintained.

Further, as shown in FIG. 11, the three-way ball valve 7 includes an unlocking mechanism 77 that unlocks the moving bar 56 by the locking mechanism 76. Since this lock release mechanism 77 has the same configuration as the emergency shutoff valve 3 and the emergency release valve 44 of the emergency release valve 5 in FIG. 5A, the same components are denoted by the same reference numerals, and the description thereof will be given. Omit as much as possible.
That is, the lock release mechanism 77 includes a lock arm 45, a lock release hole 46, an electromagnetic solenoid 47, and the like.

  When the electromagnetic solenoid 47 of the lock release mechanism 77 of the three-way ball valve 5 is operated, the swing arm 63 is unlocked, and thereby the movable bar 56 is unlocked. Accordingly, the moving bar 56 is moved from the first position (FIGS. 8A and 9A) to the second position (FIGS. 8B and 9B) by the elastic biasing force of the spring 55. At this time, the lock pin 65 at the distal end of the moving bar 56 swings the swing arm 63 and comes out of the notch 64.

  Thus, the unlocking mechanism 77 releases the lock of the moving bar 56, so that the moving bar 56 is quickly moved from the first position to the second position by the elastic biasing force of the spring 55. In conjunction with this movement, the valve shaft 73 rotates, whereby the ball valve body 74 rotates, and the three-way ball valve 7 instantaneously switches from the first state to the second state. That is, the ultraviolet treatment device 2 and the purified water storage unit 11 are changed from communication to non-communication, and the ultraviolet treatment device 2 and the drainage storage unit 12 are changed from communication to non-communication.

  When the valve shaft 73 is rotated by operating the handle 78 shown in FIG. 11, the three-way ball valve 7 returns from the second state to the first state, and the lock mechanism 76 locks the moving bar 56 in the first position. It has come to return to the state.

[Description of water treatment system operation]
Referring to FIG. 10 again, the control panel 15 is connected to the abnormality detection means 20 (specifically, the determination unit 27 of FIG. 2), and the three-way ball valve 7 (specifically, the unlocking mechanism of FIG. 11). 77 electromagnetic solenoids 47).

  When the abnormality detection means 20 does not detect any abnormality, the control panel 15 puts the three-way ball valve 7 in the first state, that is, each ultraviolet treatment device 2 communicates with the purified water storage unit 11 and does not communicate with the waste water storage unit 12. You are in communication. The water treatment system sends the water in the raw water storage unit 1 to each ultraviolet treatment device 2 through the flow path 10 by the pump P. And a water treatment system inactivates chlorine-resistant pathogenic organisms, such as Cryptosporidium, by ultraviolet-treating water with the ultraviolet-ray processing apparatus 2. FIG. The water treatment system sends the ultraviolet-treated water from each ultraviolet treatment device 2 to the purified water storage unit 11 through the flow path 13. The water stored in the purified water storage unit 11 is then supplied downstream.

  When the abnormality detection means 20 detects that an abnormality has occurred in any one of the ultraviolet ray processing apparatuses 2, the control panel 15 operates the electromagnetic solenoid 47 of the lock release mechanism 77 of the three-way ball valve 7, and the spring 55 as described above. The first state is switched to the second state by the elastic urging force. In other words, the ultraviolet treatment device 2 is not in communication with the purified water storage unit 11 and is in communication with the drainage storage unit 12. Thereby, the water sent from the ultraviolet treatment device 2 is introduced into the flow path 14 and discharged to the drainage storage part 12, and is prevented from flowing out to the purified water storage part 11.

  The water treatment system of the second embodiment configured as described above can also achieve the same effect as that of the first embodiment by including the spring-type three-way ball valve 7. Further, in the second embodiment, only one valve of the three-way ball valve 7 is sufficient, and it is not necessary to provide two valves like the emergency shut-off valve 3 and the emergency release valve 5.

The preferred embodiment of the present invention has been described above, but the scope of the present invention is not limited to this embodiment.
With respect to the first embodiment and the second embodiment, for example, when the diameter of the pipes constituting the flow paths 13 and 14 is 150 mm or more, the first embodiment is implemented, and the smaller diameter (100 mm, 75 mm, 50 mm). Sometimes, it is preferable to implement the second embodiment, but the scope of the present invention is not limited to this.

[overall structure]
2 UV treatment device 3 Weight type emergency shut-off valve (first valve)
5 Spring-type emergency release valve (second valve)
7 Spring-type three-way ball valve 13 Channel (first channel)
14 channel (second channel)
15 Control panel (control means)
20 Anomaly detection means
[Weighted emergency shutoff valve (first valve)]
30 First valve box 31 First valve shaft 32 First valve body 33 Weight 34 Swing arm 38 First lock mechanism 44 First lock release mechanism
[Spring type emergency release valve (second valve)]
50 Second valve box 51 Second valve shaft 52 Second valve body 55 Spring 56 Moving bar (moving member)
61 Second lock mechanism 67 Second lock release mechanism
[Spring type three-way ball valve]
55 Spring 56 Moving bar (moving member)
70 Valve box 73 Valve shaft 74 Ball valve element 76 Lock mechanism 77 Lock release mechanism

Claims (4)

An ultraviolet treatment device for ultraviolet treatment of water;
An abnormality detecting means for detecting an abnormality of the ultraviolet treatment device;
A first flow path connected to the ultraviolet treatment device;
A purified water storage unit that is connected to the first flow path and stores water from the first flow path that has been subjected to ultraviolet treatment by the ultraviolet treatment device;
A first valve as an emergency shut-off valve installed in the first flow path;
A second flow path branched from a portion of the first flow path between the ultraviolet treatment device and the first valve;
A drainage reservoir connected to the second flow path and storing water from the second flow path;
A second valve as an emergency release valve installed in the second flow path;
When the abnormality detection means detects an abnormality, the first valve is operated to shut off the first flow path, and the second valve is operated to open the second flow path, thereby And a control means for preventing flow from the ultraviolet treatment device to the waste water storage section and preventing flow to the purified water storage section,
The first valve is a weight-type emergency shut-off valve that shuts off the first flow path by the weight of the weight,
The second valve is a spring-type emergency release valve that opens the second flow path by an elastic biasing force of a spring.
A water treatment system characterized by that. The first valve is
A first valve box installed in the first flow path;
A first valve shaft rotatably supported by the first valve box;
A first valve body that is rotated by rotation of the first valve shaft to shut off and open the first flow path;
A closed position provided so as to be linked to the first valve shaft, wherein the first valve body shuts off the first flow path, and an open position where the first valve body opens the first flow path. A swing arm that can swing between,
The weight attached to the swing arm and biasing the swing arm to the closed position by weight;
A first locking mechanism that locks the swing arm in the open position against gravity;
A first unlocking mechanism for unlocking the swing arm by the first locking mechanism,
The second valve is
A second valve box installed in the second flow path;
A second valve shaft rotatably supported by the second valve box;
A second valve body that is rotated by rotation of the second valve shaft to block and open the second flow path;
A closed position provided so as to be linked to the second valve shaft, wherein the second valve body shuts off the second flow path, and an open position where the second valve body opens the second flow path. A movable member movable between,
The spring for biasing the moving member to the open position by an elastic biasing force;
A second locking mechanism that locks the moving member in the closed position against an elastic biasing force of the spring;
A second unlocking mechanism for unlocking the moving member by the second locking mechanism,
When the abnormality detecting means detects an abnormality, the control means operates the first lock release mechanism to release the lock of the swing arm, and rotates the first valve shaft by the weight of the weight. Thus, the first flow path is shut off, the second unlocking mechanism is operated to unlock the moving member, and the second valve shaft is rotated by the elastic biasing force of the spring. 2 open the flow path,
The water treatment system according to claim 1. An ultraviolet treatment device for ultraviolet treatment of water;
An abnormality detecting means for detecting an abnormality of the ultraviolet treatment device;
A first flow path connected to the ultraviolet treatment device;
A purified water storage unit that is connected to the first flow path and stores water from the first flow path that has been subjected to ultraviolet treatment by the ultraviolet treatment device;
A second flow path branched from the first flow path;
A drainage reservoir connected to the second flow path and storing water from the second flow path;
A three-way ball valve installed at a branch point from the first flow path of the second flow path,
The three-way ball valve has a first state in which the ultraviolet treatment device communicates with the purified water storage unit and is not in communication with the waste water storage unit, and the ultraviolet treatment device is not in communication with the purified water storage unit, Switchable to a second state communicating with the reservoir, and
When the ultraviolet ray treatment device detects an abnormality, the three-way ball valve is switched from the first state to the second state so that water flows from the ultraviolet ray treatment device to the drainage reservoir, and the water purification reservoir Control means for preventing flow to
The three-way ball valve is a spring-type three-way ball valve that is switched from the first state to the second state by an elastic biasing force of a spring.
A water treatment system characterized by that. The three-way ball valve is
A valve box installed at the branch point;
A valve shaft rotatably supported by the valve box;
A ball valve body that is rotated by rotation of the valve shaft to switch between the first state and the second state;
Provided in conjunction with the valve shaft, the ball valve body is movable between a first position where the first state is formed and a second position where the ball valve body forms the second state. A moving member,
The spring for elastically biasing the moving member to the second position;
A locking mechanism that locks the moving member in the first position against an elastic biasing force of the spring;
An unlocking mechanism for unlocking the moving member by the locking mechanism,
When the abnormality detecting means detects an abnormality, the control means operates the lock release mechanism to release the lock of the moving member, rotates the valve shaft by an elastic biasing force of the spring, and Switching the three-way ball valve from the first state to the second state;
The water treatment system according to claim 3.

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