JP2006292035A - Valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve capable of securing a wide flow regulating range. <P>SOLUTION: An inlet side passage 15 from a fluid inlet 11 is branched into a first branch passage 16, a second branch passage 17, and a third branch passage 18, and a first fluid outlet 12, a second fluid outlet 13, and a third fluid outlet 14 are formed. A passage opening and closing mechanism for individually opening and closing the first branch passage 16, the second branch passage 17 and the third branch passage 18 is installed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a valve capable of adjusting a flow rate of a fluid.

  Conventionally, as a flow rate adjusting mechanism in a flow path, for example, as described in Patent Document 1, a valve body is moved with respect to a valve seat, and a flow path area between the valve body and the valve seat is adjusted. By doing so, there is a mechanism that adjusts the flow rate of the fluid.

  Impurities contained in water to be treated as a water treatment system that performs water treatment of water supplied to equipment such as steam boilers, hot water boilers, cooling towers, water heaters, and other water-using equipment such as cleaning devices There is a water treatment system having a reverse osmosis membrane part for filtering the like. In this water treatment system, water to be treated flows from one side of the reverse osmosis membrane part, and impurities contained in the water to be treated are filtered by the reverse osmosis membrane part. And the filtered permeated water flows out from the other side of the reverse osmosis membrane part, and is supplied to the device as water supply.

By the way, concentrated water flows out from the other side of the reverse osmosis membrane portion in addition to permeated water. In the water treatment system, there is a configuration in which only a part of the concentrated water is drained from a drain line provided with a drain valve and the remaining part is returned to the upstream side of the reverse osmosis membrane unit in order to effectively use water.
JP 2002-122257 A

  Here, in order to increase the water use efficiency in the water treatment system, the drainage flow rate of the concentrated water is decreased, and the ratio of the flow rate of the permeated water to the sum of the flow rate of the permeated water and the drainage flow rate of the concentrated water (hereinafter, "Recovery rate")). However, the lower the concentrated water drainage flow rate and the higher the recovery rate, the greater the amount of concentrated water recirculated to the upstream side of the reverse osmosis membrane part. As a result, the concentration of impurities in the water to be treated increases, and the film is likely to be clogged or deteriorated due to phenomena such as fouling and scaling. Here, fouling is a phenomenon in which suspended matter components, colloidal components, organic components, etc. in the treated water are deposited or adsorbed on the membrane surface. Scaling is a dissolved substance dissolved in the treated water. This is a phenomenon in which when it is concentrated above the solubility, it is deposited and deposited on the film surface.

  When clogging or deterioration of the membrane in the reverse osmosis membrane portion occurs, a situation such as deterioration of the treated water quality occurs. Therefore, it is desirable to always operate at a recovery rate that provides a degree of concentration that can prevent clogging or deterioration of the membrane in the reverse osmosis membrane part while maintaining the utilization efficiency of water as high as possible.

  By the way, when there is a change in the temperature of the feed water, the flow rate of the permeated water from the reverse osmosis membrane portion changes due to a change in the viscosity of the water and the membrane characteristics. Further, as a water treatment method using a reverse osmosis membrane part and a membrane type deaeration part provided on the water supply line to the equipment, filtration and dissolution of impurities and the like according to the temperature change of the water supply flowing through the water supply line A water treatment method for efficiently degassing gas has been proposed (Japanese Patent Application No. 2004-97810). In this water treatment method, the flow rate is controlled based on the temperature of the water supply, so that the reverse osmosis membrane is used. The flow rate of permeated water from the section changes. Thus, when the flow rate of the permeated water changes, the recovery rate cannot be kept constant, and the water use efficiency may deteriorate, or the clogging or deterioration of the reverse osmosis membrane may occur. .

  Therefore, based on the flow rate of the permeated water from the reverse osmosis membrane part in order to prevent the deterioration of treated water quality by suppressing fouling and scaling in the reverse osmosis membrane part while maintaining the utilization efficiency of water as high as possible. Thus, it is conceivable to adjust the drainage flow rate of the concentrated water from the drainage line and maintain the recovery rate constant corresponding to the change in the permeate flow rate.

  Moreover, the solubility of the scale generation component contained in the water to be treated varies depending on the water quality and the water temperature. These water quality and temperature are likely to fluctuate due to regional and seasonal factors. Therefore, in order to prevent clogging or deterioration of the membrane in the reverse osmosis membrane part, the worst condition is usually set for the water quality and the water temperature, and the drainage flow rate of concentrated water is set to be increased. For this reason, there exists a problem that drainage flow volume increases and the effective use of water cannot be aimed at.

  Therefore, in order to prevent deterioration of treated water quality due to clogging or deterioration of the membrane in the reverse osmosis membrane part, and to prevent drainage of concentrated water more than necessary, water supply to the reverse osmosis membrane part, reverse Adjust the drainage flow rate of the concentrated water from the drainage line based on the temperature of either the permeated water from the osmosis membrane part or the concentrated water from the reverse osmosis membrane part, or the quality of the feed water to the reverse osmosis membrane part It is possible to do.

  Further, in order to suppress the progress of clogging and deterioration of the membrane in the reverse osmosis membrane part and maintain the quality of treated water, the concentration from the drainage line is based on the clogged state or deterioration state of the membrane in the reverse osmosis membrane part. It is conceivable to adjust the water discharge flow rate.

  Here, it is necessary to adjust the drainage flow rate of the concentrated water from the drainage line with a predetermined flow rate adjustment width. However, the flow rate adjusting mechanism described in Patent Document 1 has a small variable range of the flow path area between the valve body and the valve seat, and it is difficult to ensure a necessary flow rate adjustment width. There is a need for a valve that can ensure a wider flow rate adjustment range.

  The present invention has been made in view of the above circumstances, and a problem to be solved is to realize a valve capable of ensuring a wide flow rate adjustment range.

  The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 forms a plurality of fluid outlets by branching a plurality of flow paths from the fluid inlet to each fluid outlet. A channel opening / closing mechanism for opening / closing each of the branch channels is provided.

  According to the first aspect of the present invention, each of the branch channels is opened and closed by the channel opening and closing mechanism, and the flow rate is gradually increased according to the number of the branch channels set to the open state. Adjusted.

  The invention according to claim 2 is characterized in that, in claim 1, a constant flow valve mechanism is provided in each of the branch flow paths.

  According to the invention described in claim 2, the flow rate of each branch flow path is maintained constant by the constant flow valve mechanism.

  Further, according to a third aspect of the present invention, in the second aspect, the constant flow rate valve mechanism is set to a different flow rate value for each of the branch flow paths.

  According to the third aspect of the present invention, since the flow rates of the branch flow channels opened and closed by the flow channel opening / closing mechanisms are different, the number of stages for adjusting the flow rate is secured while ensuring a wide flow rate adjustment range. Can be increased.

  According to the first aspect of the present invention, the flow rate is adjusted stepwise in accordance with the number of the respective branch flow channels set to the open state, thereby ensuring a wide flow rate adjustment range. .

  According to the second aspect of the present invention, even when the pressure is changed in a state where the pressure is applied to the fluid upstream of the constant flow valve mechanism, before and after the change, The flow rate can be kept constant. Thereby, the flow rate can be accurately adjusted to a predetermined value.

  According to the third aspect of the present invention, the flow rate can be adjusted to a desired flow rate with higher accuracy by increasing the number of stages of flow rate adjustment while ensuring a wide flow rate adjustment range.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially broken front view showing an example of an embodiment of a valve according to the present invention, and shows a drain valve as a specific example. 2 is a plan view of the drain valve shown in FIG. 1, FIG. 3 is a left side view of the drain valve shown in FIG. 1, and FIG. 4 is a first branch in the drain valve shown in FIG. It is a partially vertical right side view of the unit.

  A drain valve 1 shown in FIGS. 1 to 4 includes a lower main body 2, a first upper main body 4, a second upper main body 5, and a third upper body 2 detachably attached to the lower main body 2 with screws 3. An upper body portion 6 is provided, and further, a first electromagnetic valve storage portion 8, a second electromagnetic valve storage portion 9 and a third electromagnetic valve storage portion 10 which are attached to the lower body portion 2 with screws 7 are provided.

  The lower body 2 is formed with a fluid inlet 11, a first fluid outlet 12, a second fluid outlet 13, and a third fluid outlet 14, respectively. An inlet-side flow path 15 that continues from the fluid inlet 11 has a first branch flow path 16 that continues to the first fluid outlet 12, a second branch path 17 that continues to the second fluid outlet 13, and the third fluid outlet. Each branch is branched into a third branch flow path 18 leading to 14. Diaphragms 20, 20, 20 and constant flow valve mechanisms 21, 21, 21 constituting the channel opening / closing mechanisms 19, 19, 19 are provided in the respective branch channels 16, 17, 18.

  Here, the drain valve 1 includes a first branch unit 22, a second branch unit 23, and a third branch unit 24. The first branch unit 22 includes the first fluid outlet 12, the first branch flow path 16, the flow path opening / closing mechanism 19, the constant flow valve mechanism 21, the first upper body portion 4, and the first electromagnetic valve. The housing portion 8 is configured to be included. The second branch unit 23 includes the second fluid outlet 13, the second branch channel 17, the channel opening / closing mechanism 19, the constant flow valve mechanism 21, the second upper body 5, and the second The electromagnetic valve storage unit 9 is included. Further, the third branch unit 24 includes the third fluid outlet 14, the third branch flow path 18, the flow path opening / closing mechanism 19, the constant flow valve mechanism 21, the third upper body portion 6, and the third The electromagnetic valve storage unit 10 is included.

  A detailed configuration of each of the branch units 22, 23, 24 will be described with reference to FIG. Here, each said branch unit 22,23,24 has the same structure. Therefore, in the following description, the configuration of the first branch unit 22 will be described, and the description of the second branch unit 23 and the third branch unit 24 will be omitted.

  In the first branch unit 22, the first branch channel 16 includes an upstream branch channel 25 on the upstream side of the diaphragm 20 and a downstream branch channel 26 on the downstream side of the diaphragm 20. ing. The upstream branch flow path 25 is formed in a ring shape around the wall 27 formed in a cylindrical shape, and a part thereof communicates with the inlet flow path 15. The downstream branch flow channel 26 includes a hollow portion 28 of the wall 27, and the constant flow valve mechanism 21 is provided in the flow channel. The constant flow valve mechanism 21 is a known mechanism including an O-ring 29 that is reduced in diameter as the fluid pressure is applied. Here, the constant flow valve mechanisms 21 are set to different flow values in the branch units 22, 23, and 24, respectively.

  A liquid storage space 30 is formed between the first upper body 4 and the diaphragm 20. The liquid storage space 30 communicates with the inlet-side flow path 15 via the first series flow path 31.

  The liquid storage space 30 communicates with the downstream branch flow path 26 via the second communication flow path 32. The second communication channel 32 extends from the liquid storage space 30 through the first electromagnetic valve storage unit 8 to the downstream branch channel 26 and is provided in the first electromagnetic valve storage unit 8. The flow path is opened and closed by a solenoid valve (not shown).

  Here, the channel opening / closing mechanism 19 that opens and closes the first branch channel 16 will be described. The flow path opening / closing mechanism 19 operates a valve seat 33 formed at the distal end portion of the wall portion 27, the diaphragm 20 constituting a valve body that contacts and separates from the valve seat 33, and the diaphragm 20. The electromagnetic valve is provided.

  The diaphragm 20 is sandwiched between the lower main body 2 and the first upper main body 4 and is held in the first branch flow path 16. The diaphragm 20 is formed with a first through hole 34 that constitutes a part of the first series passage 31 and a second through hole 35 that constitutes a part of the second communication path 32. . Here, reference numerals 36 and 37 denote O-rings for sealing between the first upper body portion 4 and the lower body portion 2.

  A diaphragm reinforcing member 38 formed in a bottomed cylindrical shape is attached to the diaphragm 20 so that the opening 39 faces the opposite side of the diaphragm 20. The diaphragm reinforcing member 38 is disposed in the liquid storage space 30, and has a pin 40 passing through the diaphragm 20, and a push nut (not shown) inserted from the tip side of the pin 40 and the diaphragm 20. The diaphragm 20 is attached by being sandwiched between them. The diaphragm 20 is biased toward the valve seat 33 by inserting a spring 43 between the bottom 41 of the diaphragm reinforcing member 38 and the ceiling 42 of the first upper body 4. It has come to be.

  In the flow path opening / closing mechanism 19, the diaphragm 20 is operated by opening and closing the electromagnetic valve connected to a control unit (not shown) via the electric wire 44 based on a command from the control unit. The first branch channel 16 is opened and closed. Specifically, when the solenoid valve is in a closed state, the spring 43 and the fluid accumulated in the liquid storage space 30 from the inlet side flow path 15 through the first series flow path 31, The diaphragm 20 is pressed toward the valve seat 33 and is seated on the valve seat 33 to close the first branch flow path 16. Conversely, when the solenoid valve is in the open state, the fluid accumulated in the liquid reservoir space 30 flows from the second communication channel 32 to the downstream branch channel 26, and thereby the liquid reservoir space 30. The pressing force to the diaphragm 20 by the fluid inside is released, and the pressing force (force in the direction away from the valve seat 33) from the upstream branch flow path 25 to the diaphragm 20 is increased. 20 separates from the valve seat 33 against the elastic force of the spring 43, and the first branch passage 16 is opened.

  For example, the drain valve 1 configured as described above drains only a part of the concentrated water from the reverse osmosis membrane portion provided in the water supply line to the equipment, and returns the remainder to the upstream side of the reverse osmosis membrane portion. In the water treatment system to be used, it is provided in a drain line for concentrated water from the reverse osmosis membrane (not shown). In this case, the fluid inlet 11 is connected to the drain line on the reverse osmosis membrane portion side, and the fluid outlets 12, 13, and 14 are connected to the drain line on the drain side.

  In this way, the drain valve 1 provided in the drain line keeps the recovery rate constant based on the flow rate of the permeated water even if the flow rate of the permeated water from the reverse osmosis membrane portion changes, for example. It can function as one that regulates the drainage flow rate of concentrated water. Further, in order to prevent clogging or deterioration of the membrane in the reverse osmosis membrane portion, it can function as one that adjusts the drainage flow rate of the concentrated water based on the quality of the water to be treated and the water temperature. Further, in order to suppress the progress of clogging and deterioration of the membrane in the reverse osmosis membrane part and maintain the quality of treated water, the drainage flow rate of concentrated water is adjusted based on the clogged state and deterioration state of the membrane in the reverse osmosis membrane part Can function as

  The drainage flow rate of the concentrated water by the drainage valve 1 is adjusted by opening and closing each of the branch channels 16, 17, and 18 with the channel opening / closing mechanism 19. That is, the drainage valve 1 can change the drainage flow rate of the concentrated water step by step by selecting one of the branch channels 16, 17, 18 to be opened. On the basis of detection signals from various measuring devices provided in the water supply line of the water treatment system, the flow path opening / closing mechanisms 19 are controlled to open and close so as to obtain a desired drainage flow rate. Here, the desired flow rate is, for example, a flow rate that can make the recovery rate constant, a flow rate that can prevent clogging or deterioration of the membrane in the reverse osmosis membrane portion, or a membrane clogging in the reverse osmosis membrane portion. Or a flow rate that can suppress the progress of deterioration.

  According to the drain valve 1, a wide drainage flow rate adjustment range can be secured by opening and closing the branch channels 16, 17, and 18 by the channel opening / closing mechanisms 19. As a result, in the water treatment system, a drainage flow rate adjustment range of the concentrated water necessary to make the recovery rate constant or to prevent or suppress clogging or deterioration of the membrane of the reverse osmosis membrane portion is ensured. be able to.

  In the water treatment system, when water to be treated is supplied to the reverse osmosis membrane portion by a pump (not shown) provided upstream of the reverse osmosis membrane portion, the pressure applied by the pump is changed. However, before and after this change, the flow rates of the branch flow paths 16, 17, and 18 can be kept constant by the constant flow valve mechanisms 21. Thereby, the waste water flow rate can be accurately adjusted to a predetermined flow rate.

  Further, the flow rate of each branch flow path 16, 17, and 18 is set to a different flow rate value by each constant flow valve mechanism 21, so that a wide drainage flow rate adjustment range is ensured while adjusting the flow rate. The number can be increased, and the desired drainage flow rate can be adjusted with higher accuracy.

  Here, each flow path opening / closing mechanism 19 is not limited to the above-described configuration. For example, each of the branch flow paths 16, 17, 18 is opened and closed by a piston that slides in the inlet-side flow path 15. It may be a thing.

  Although the drain valve has been described as a specific embodiment, the present invention can be applied not only to liquid but also to flow rate adjustment in a gas flow path. In addition, it goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

1 is a partially broken front view of a drain valve that is an example of an embodiment of a valve according to the present invention. It is a top view of the drain valve shown in FIG. It is the left view which fractured | ruptured the drain valve shown in FIG. It is a partially vertical right side view of the first branch unit of the drain valve shown in FIG.

Explanation of symbols

1 valve 11 fluid inlet 12 first fluid outlet (fluid outlet)
13 Second fluid outlet (fluid outlet)
14 Third fluid outlet (fluid outlet)
15 Inlet side channel (channel)
16 First branch channel (Branch channel)
17 Second branch channel (Branch channel)
18 Third branch channel (Branch channel)
19 Channel opening / closing mechanism 21 Constant flow valve mechanism

Claims (3)

  A valve comprising a flow path opening / closing mechanism that branches a flow path from a fluid inlet into a plurality of fluids to form a plurality of fluid outlets, and opens and closes each of the branched flow paths to each fluid outlet.   The valve according to claim 1, wherein a constant flow valve mechanism is provided in each branch flow path.   The valve according to claim 2, wherein the constant flow valve mechanism is set to a different flow value for each of the branch flow paths.

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