JP3795494B2 - Filtration device - Google Patents

Description

  The present invention relates to a filtration device suitable for removing a solid content floating in a liquid.

  In general, a filtration device is used to remove solid components floating in the liquid.

  The filtering material of the filtration device is filtered by blocking the passage of solids and allowing only liquid to pass through, but as a filtering material, it is replaced with a disposable type that is replaced with a new one when used for a certain period of time, and is washed and regenerated. Reuse types to be known are known.

  The former disposable type is not desirable in terms of running cost. In the case of the latter reuse type, solids enter the filter hole of the filter medium, and when the filter hole is clogged, it takes time to remove the solid content and a large amount of washing water. Is used. Also, depending on the raw water to be filtered, the solid content inside the filter hole is removed by using chemicals, but this is not desirable in terms of environmental problems.

Both the former and the latter have been known to use coil springs that do not use chemicals or the like because they have problems, and that can be easily cleaned and regenerated.
Japanese Patent Laid-Open No. 2002-232111

  Although the means using a coil spring as a filter medium is excellent in terms of maintenance such as cleaning, maintenance is performed to recover from the fact that raw water with a large solid content to be filtered accumulates quickly and the filtration efficiency decreases. Work needs to be done frequently.

  This maintenance work is performed while the entire apparatus is stopped for a certain period of time. However, since the cycle of stopping is frequent, it is not desirable in terms of operation. In addition, it is not desirable in terms of workability and cost because it is necessary to use a special coil spring provided with a protrusion to form the filtration gap and it is difficult to make a fine filtration gap.

  Accordingly, an object of the present invention is to provide a filtration device that can obtain a fine filtration gap without using a special coil spring, and that can secure a set filtration gap over a long period of time. Yes.

In order to achieve the above object, according to the first aspect of the present invention, a raw water circulation inlet and a raw water circulation outlet for circulating raw water in the filtration container, and a filtering means for filtering the raw water circulating in the filtration container; A filtered water outlet for taking out the filtered water filtered by the filtering means out of the filtration container;
The filtering means includes a double coil spring having an outer coil spring and an outer coil spring communicating with the filtered water outlet, and a pressure in an operation control chamber provided in the filtration container. The double coil spring includes a load transmission means that always creates a fixed filtration gap through an actuating rod that rises or falls based on a change .

In the second aspect of the present invention, the filtering means in which the outer peripheral surface serving as the filtration surface is formed of a cylindrical double coil spring by an inner coil spring and an outer coil spring and is directly exposed to the atmosphere, and the double applying a load to the coil spring, Ri Do from the load transmission means to make constant filtration gap is set, the suction means for taking out the filtered water filtered by the filtering means to the outside, the liquid at least the filtering means the Rukoto Do available submerged under the surface, characterized.

According to the first filtration device of the present invention, when the gap for filtration of the double coil spring becomes narrow due to the accumulation of solid content after being used for a predetermined period, the pressure in the operation control chamber changes and the pressure changes. amount that narrowed based, by enlarging the filtration gap by force transmission device, it is possible to always reliably ensured over a long period of time a constant filtration gap is set.
Moreover, according to the 2nd filtration apparatus, while being carried to the place to filter and being submerged under a liquid level, it can wash easily by taking out from a liquid level.

On the other hand , the inner coil spring and the outer coil spring composing the double coil spring, when a load is applied, face each other between the valleys that are coiled together in combination with the spring pressure. A fine filtration gap can be obtained by the double combination gap that acts like a wedge, and a stable and constant filtration gap can be obtained.

In the present invention, a gap for filtration with a wide adjustment width is obtained by the double coil spring, and either one of the raw water circulation inlet and the raw water circulation outlet is arranged at the bottom of the filtration vessel, while the filtered water outlet The switching means enables the feeding of the washing water separately from the removal of the filtered water, and the attached solid content is removed by the washing water from the filtrate water outlet without removing the double coil spring.

  The first embodiment of the present invention will be specifically described below with reference to the drawings of FIGS.

  FIG. 1 shows a schematic explanatory diagram of the entire filtering device.

  The filtration device 1 has a filtration container 7 provided with a raw water circulation inlet 3 and a raw water circulation outlet 5, respectively, and a close-contact double coil spring 9 serving as a filtering means is provided in the filtration container 7.

  Of the raw water circulation inlet 3 and the raw water circulation outlet 5, the raw water circulation inlet 3 is disposed at the bottom of the filtration container 7, and the raw water circulation outlet 5 is disposed at the top of the filtration container 7. In this case, the raw water circulation outlet 5 may be arranged at the bottom and the raw water circulation inlet 3 may be arranged at the top.

  The raw water circulation inlet 3 and the raw water circulation outlet 5 enter the raw water tank 11 forcibly by the pump 13 so that the raw water tank 11 enters from the bottom of the filtration container 7 and escapes from the top, and then the raw water tank 11 again. A circulation flow path 15 returning to the inside is formed.

  In the initial stage of the operation, the air in the filtration container 7 opens the vent opening / closing valve 19 provided in the vent port 17, and then the raw water is sent into the filtration container 7, and the liquid level rises sequentially. Thus, since the gas is discharged to the side groove 21, the vent opening / closing valve 19 is closed again after determining the completion of the discharge, so that air can be easily removed.

  The circulation channel 15 is provided with a first on-off valve 23 and a three-way valve 25 on the raw water circulation inlet 3 side, and a second on-off valve 27 on the raw water circulation outlet 5 side. The first on-off valve 23 is controlled to be opened or closed, so that raw water can be supplied to the raw water circulation inlet 3 and the flow rate can be adjusted. As for the three-way valve 25, the flow of the raw water toward the raw water circulation inlet 3 is ensured by closing the third port P3, which is a drain through which the first port P1 and the second port P2 communicate with each other. Further, the first port P1 and the second port P2 are closed, and the third port P3 serving as a drain is opened, so that the raw water in the filtration container 7 can be drained during maintenance. The second on-off valve 27 is controlled to be opened or closed, so that the pressure in the filtration container 7 can be adjusted.

  As shown in FIG. 2, the double coil spring 9 forms a filtration surface formed in a cylindrical shape by an intimate inner coil spring 29 and an intimate outer coil spring 31 disposed on the outer side.

  As shown in FIG. 3, the inner coil spring 29 and the outer coil spring 31 are set so as to face each other between the valleys wound in a coil shape, and the upper portions of the coil springs 29 and 31 are coil spring opening support tools. The upper open port 39 faces the inside of the operation control chamber 35 while being supported by being suspended on the floor surface 37 of the operation control chamber 35 through 33.

  The bottoms of the outer and inner coil springs 31 and 29 are supported in a state of being closed by a coil spring support bracket 41, and a filtration gap d is created by the load transmission means 43 as shown in FIG.

  The load transmission means 43 includes an operation rod 45 extended upward from the coil spring support bracket 41 through the inside of the double coil spring 9 and the operation control chamber 35 for raising or lowering the operation rod 45. .

  The operation control chamber 35 is a chamber filled with the filtered water that has passed through the double coil spring 9, and has a filtered water outlet 47 and a control cylinder 49 for taking out the filtered water to the outside. . Note that the air in the operation control chamber 35 can be discharged to the side groove 21 by opening the on-off valve 53 provided at the vent port 51 at the initial stage of operation, and the air can be vented.

  The filtered water outlet 47 is connected to and communicated with a recovery tank 57 via a three-way valve 55 and an on-off valve 56, while a washing water tank 59 is connected to the three-way valve 55. Therefore, when the first port P1 and the second port P2 are opened by switching the valve of the three-way valve 55, the third port P3 is closed and the filtered water that has passed through the double coil spring 9 passes through the filtered water outlet 47. It is sent into the collection tank 57. Further, the first port P1 and the third port P3 are opened and the second port P2 is closed, so that the washing water in the washing water tank 59 passes through the filtrate outlet 47 and the inside of the double coil spring 9. It can flow and can be washed with washing water.

  The control cylinder 49 of the operation control chamber 35 has a disk-like piston 65 that divides the upper and lower first cylinder chambers 61 and the second cylinder chamber 63, and the operation rod 45 penetrates the central portion of the piston 65. , It is fixed integrally.

  The first cylinder chamber 61 has an inlet 69 and an outlet 71 connected to the compressor 67. The outlet 71 can be opened and closed for discharging air in the first cylinder chamber 61 to the side groove 21 during maintenance. An on-off valve 73 is provided.

  The compressor 67 has a pressure reducing adjustment valve 75 for setting and supplying a supply air pressure from the compressor 67 to a predetermined air pressure.

  The second cylinder chamber 63 is opened in the operation control chamber 35 and communicates with the filtration outlet 47. The air in the second cylinder chamber 63 is connected to the vent port 51 of the operation control chamber 35 through a flexible pipe 77 passing through the first cylinder chamber 61 as shown in FIG. Air can be vented at the initial stage of operation.

  In this case, since the flexible pipe 77 in the first cylinder chamber 61 has a slight operation stroke of the piston 65, it does not adversely affect its operation.

  Next, the relationship between the first cylinder chamber 61 and the second cylinder chamber 63 and the filtration gap d of the double coil spring 9 will be described.

Principles filtration gap d during operation is obtained, the tension of the second receiving the dynamic pressure of the filtered water in the cylinder chamber 63 rises force (primary pressure v1) to the positive double coil spring 9, the This is ensured when the force (secondary pressure v2) that descends in response to the supply air pressure in the one cylinder chamber 61 acts on the piston 65 in a balanced manner.

  Specifically, the raw water is fed from the circulation inlet 3 for filtration, a circulation pressure of the flow toward the raw water circulation outlet 5 is created, and a supply air pressure (secondary pressure v2) that exceeds the circulation pressure is supplied into the first cylinder chamber 61. The actuating rod 45 is lowered by the secondary pressure v2 via the piston 64, and a downward tensile load w is applied to the double coil spring 9, thereby creating a filtering gap d. At this time, a temporary pressure v1 rising in the second cylinder chamber 63 is generated by the filtered water from the filtering gap d, and a constant filtering gap d set by the balance between the primary pressure v1 and the secondary pressure v2 is obtained. .

Filtration gap d is set to different corresponding to each raw water filtered it is controlled managed by the operating rod position detector 81 for detecting the rod position 79 before Symbol rod 45.

The operating rod position detection device 81 has a filtration gap d for cleaning in addition to the operation length position for setting the filtration gap d for operation by setting a setting switch (not shown) provided in the device 81. It is possible to detect the cleaning length position for setting and the dead weight length when the operation is stopped.

  The setting of the own weight length, operation length position, and cleaning length position is as follows.

Set the dead weight:
When double coil spring 9 is in close contact at the time of operation stop, the rod position 79 of the rod 45 is set at Tata Kukoto the setting switch of the rod position detector 81 (not shown).

Operation length position setting:
After setting a setting switch (not shown) of the operating rod position detecting device 81 at the operation length position corresponding to each raw water treatment, the primary pressure v1 and the secondary pressure v2 are operated by operating the pressure reducing adjustment valve 75 of the compressor 67. the movement of the rod position 79 of the rod 45 by the pressure difference is monitored, its time to the secondary from the rod position 79 is the setting switch (illustrated not) the set operating length position by tapping the is detected The pressure v2 is secured by fixing the valve opening of the pressure reducing adjustment valve 75 of the compressor 67, and is set by setting the secondary pressure v2 to be balanced with respect to the primary pressure v1, that is, the supply air pressure. Yes.

Setting the cleaning length position:
After setting the setting switch of the operating rod position detecting device 81 so as to be larger than the cleaning gap d corresponding to the treatment of the raw water, specifically the filtering gap d at the operating length position, the pressure reducing adjustment valve 75 of the compressor 67 is operated. The movement of the rod position 79 of the operating rod 45 due to the pressure difference between the primary pressure v1 and the secondary pressure v2 is monitored, and the rod position 79 is set by hitting the setting switch (not shown). There secured by the secondary pressure v2 at that time from the detected fixing the valve opening of the pressure reducing control valve 75 of the compressor 67, the secondary pressure v2 balanced against primary pressure v1, i.e., the supply air It is set by this.

  During the filtration operation of the filtration device 1 configured in this way, the raw water fed from the raw water circulation inlet 3 is blocked from solid content when passing through the filtration gap d of the double coil spring 9 and passes only the fluid. Then, filtration is performed, and the filtered water is collected by the collection tank 57.

During this operation, if solid matter adheres to the double coil spring 9 and clogging occurs, the filtered water pressure passing through the double coil spring 9 decreases and the primary pressure v1 of the second cylinder chamber 63 and the first cylinder chamber 61 are reduced . The secondary pressure v <b> 2 is unbalanced, and the primary pressure v <b> 1 of the second cylinder chamber 63 decreases. As the primary pressure v1 decreases, the secondary pressure v2 of the first cylinder chamber 61 acting on the piston 65 wins , and the operating rod 45 is lowered . As a result, the gap d is enlarged for filtration given tensile load on the double coil spring 9. The pressure of increasing the passage of filtered water primary pressure v1 by expanding filtration gap d is Ri temporarily Takama, the two primary pressure v2 until the balance is filtered pressure made automatic adjustment of the filtration gap d It is. As a result, a constant filtering gap d set over a long period of time can be obtained.

  In this case, as shown in FIG. 4, the outer coil spring 31 and the inner coil spring 29 act like a wedge so as to face each other between the valleys wound in a coil shape, and a stable filtering gap d is obtained. Be able to. Further, a fine filtration gap d can be made by the double gap.

  Next, in order to clean the double coil spring 9, after the pump 13 is stopped, the third port P3 that becomes the drain of the three-way valve 25 is opened, and then the three-way valve 55 on the filtrate outlet 47 side is operated. Then, the cleaning water in the cleaning water tank 59 is fed from the filtered water outlet 47 so that the double coil spring 9 can be cleaned with the cleaning water. The washed water is discharged to the side groove 21 via the raw water circulation inlet 3 and the three-way valve 25 at the bottom.

Incidentally, the difference pressure detection control unit 85 a pressure difference between hitting the implementation and the pressure of the filtration vessel 7 as shown in FIG. 1 phantom line and filtered water outlet 47 of the present invention, detected respectively 85b, the detection signal The control unit 87 that makes a determination based on the above may control the supply air pressure of the compressor 67 so that the primary pressure v1 of the second cylinder chamber 63 and the secondary pressure v2 of the first cylinder chamber 61 are always balanced.

  In addition, the filtering gap d of the double coil spring 9 is an embodiment obtained by applying a load in the tensile direction to the double coil spring 9 in close contact, but the double coil spring having a gap in advance. It is also possible to make a filtration gap d suitable for raw water filtration by applying a load in the compression direction to the double coil spring.

  In addition, since the double coil spring 9 is difficult to be a suspended type because the weight of the double coil spring 9 increases greatly, for example, as shown in FIG. The partition wall 91 of the filtrate water chamber 89 having the filtrate outlet 47 is supported with the coil spring opening fitting 33 side of the double coil spring 9 facing downward, while the operating rod 45 serving as the load transmission means 43 is lifted to pull the load. It becomes applicable also to a large sized plant by setting it as embodiment which gives.

  In addition, although the double coil spring 9 is an embodiment provided at the center, it can be arranged to be suspended and supported on a plurality of floor surfaces 37 so as to surround the center double coil spring 9. Become.

  In the case of this embodiment, although not shown, the operating rods extending upward from the respective double coil springs 9 are fixedly supported by the disc-shaped piston 65, respectively.

  6 and 7 show an embodiment of a suction type filtering device 89.

The filtering means 91 of the filtering device 89 includes a cylindrical double coil spring 9 whose outer peripheral surface serving as a filtering surface is directly exposed to the atmosphere by the inner coil spring 29 and the outer coil spring 31.

In this case, it is desirable to provide a coil-shaped core member 92 inside the filtering means 91 so that it does not cause a middle break due to its own weight from a horizontal position where it is directly submerged below the liquid surface .

On the other hand, in addition to the filtering means 91, the filtering device 89 applies a load to the double coil spring 9 to create a set constant filtering gap d (FIG. 4), and the filtering means. Suction means 95 for taking out the filtered water filtered by 91, the filtration means 91 and the load transmission means 93 are fixedly set on the base table 96 , and by using hooks 97 provided at the front and rear. The whole suspension support by the machine is possible.

  The load transmission means 93 is a turnbuckle type that can be expanded and contracted by the adjusting portion 93a so as to be inexpensive and easy to maintain. By rotating the adjusting portion 93a clockwise or counterclockwise, the double coil spring 9 has an arrow. A load in the direction B is applied to secure a filtering gap d.

  In this case, instead of the turnbuckle, a cylinder type using water pressure or hydraulic pressure may be used as appropriate.

  As the suction means 95, a scroll type vacuum pump P is used. Between the vacuum pump P and the filtering means 91, there is provided a sealed recovery tank 105 in which a negative pressure is generated by the operation of the vacuum pump P. The vacuum pump P is connected to the recovery tank via a hose 99. 105 and the double coil spring 9 are connected and communicated with the filtered water outlet 101.

Therefore, the negative pressure of the recovery tank 105 double coil spring 9 serving as a filter means 91 for example, submerged under the liquid surface by introducing into the squeezed raw water tank 103 grapes in wine factories, by operation of the vacuum pump P By setting the area, it is possible to prevent squeezing and squeezing out of the raw water, and only filtered water can pass through the filtration gap d and be taken out into the recovery tank 105.

  In this case, the filtering gap d is stable and constant because the inner coil spring 29 and the outer coil spring 31 act between the valleys. Further, a fine filtration gap d is obtained by a combination of gaps formed by the inner coil spring 29 and the outer coil spring 31.

Contact name after use may be to take-out City rinsed from the raw water tank 103, washing of the double coil spring 9 becomes easily so.

BRIEF DESCRIPTION OF THE DRAWINGS Outline explanatory drawing of the whole filtration apparatus of Example 1 concerning this invention. The outline expanded sectional view of the double coiled spring used as a filtration means. Operation | movement explanatory drawing at the time of the operation stop of a double coil spring. The expanded operation explanatory view at the time of the operation where the clearance gap for filtration was made in the double coil spring. The schematic explanatory drawing which showed another embodiment which supported the spring load of the whole double coil spring by the coil spring opening metal fitting side, and was able to respond | correspond also with a large sized double coil spring. FIG. 5 is a schematic explanatory diagram of a filtering unit of Example 2. The outline explanatory drawing of the whole filtration apparatus of Example 2. FIG.

Explanation of symbols

3 ... Raw water circulation inlet 5 ... Raw water circulation outlet 7 ... Filtration container 9 ... Double coil spring (filtration means)
29 ... Inner coil spring 31 ... Outer coil spring 35 ... Operation control chamber 43 ... Load transmitting means 45 ... Operating rod
47 ... Filtrated water outlet 85 ... Differential pressure detection control means 87 ... Control unit
93 ... Load transmission means

Claims (3)

A raw water circulation inlet and a raw water circulation outlet for circulating the raw water in the filtration container, a filtering means for filtering the raw water circulating in the filtration container, and a filtered water outlet for taking out the filtered water filtered by the filtering means to the outside of the filtration container And
The filtration means includes a double coil spring having an outer coil spring and an outer coil spring that communicates with the filtrate outlet and a pressure in an operation control chamber provided in the filtration container. A filtration device comprising: a load transmitting means that always creates a constant filtration gap in the double coil spring via an operating rod that rises or falls based on a change .   Either one of the raw water circulation inlet and the raw water circulation outlet is disposed at the bottom of the filtration container, while the filtered water outlet can be fed with wash water separately from the filtered water by switching means. The filtration device according to claim 1, wherein The outer peripheral surface to be a filtration surface is configured by a cylindrical double coil spring constituted by an inner coil spring and an outer coil spring, and is directly exposed to the atmosphere . a load transmission means for making certain filtration gap, Ri Do and a suction means for withdrawing out the filtered water filtered by the filtering means, that Do usable submerged at least said filter means below the liquid surface A filtering device characterized by that.

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