WO2012011150A1 - Piston structure and control valve - Google Patents

Piston structure and control valve Download PDF

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Publication number
WO2012011150A1
WO2012011150A1 PCT/JP2010/004680 JP2010004680W WO2012011150A1 WO 2012011150 A1 WO2012011150 A1 WO 2012011150A1 JP 2010004680 W JP2010004680 W JP 2010004680W WO 2012011150 A1 WO2012011150 A1 WO 2012011150A1
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WO
WIPO (PCT)
Prior art keywords
flange
piston structure
outer peripheral
peripheral surface
seal member
Prior art date
Application number
PCT/JP2010/004680
Other languages
French (fr)
Japanese (ja)
Inventor
山岡信也
真鍋敦行
中村三郎
Original Assignee
三浦工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三浦工業株式会社 filed Critical 三浦工業株式会社
Priority to PCT/JP2010/004680 priority Critical patent/WO2012011150A1/en
Priority to JP2011511935A priority patent/JP4803332B1/en
Publication of WO2012011150A1 publication Critical patent/WO2012011150A1/en

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0712—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides comprising particular spool-valve sealing means
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/004—Seals, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/005—Valves
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents

Definitions

  • the present invention relates to a piston structure and a control valve used for, for example, a water softener.
  • a device for removing the hardness contained in the water supply is connected to the water supply line to the cooling / heating equipment such as a boiler, a water heater or a cooler because it is necessary to prevent scale adhesion in the cooling / heating equipment.
  • the cooling / heating equipment such as a boiler, a water heater or a cooler because it is necessary to prevent scale adhesion in the cooling / heating equipment.
  • an automatic regenerative water softener that uses an ion exchange resin to remove hardness is widely used.
  • This type of water softener is composed of a salt water tank and a resin cylinder filled with an ion exchange resin, and operates a control valve disposed at the top of the resin cylinder to (1) backwash, (2) salt water regeneration, A cycle of a plurality of steps such as (3) water washing, (4) rapid water washing, and (5) soft water flow is performed by an automatic regeneration operation.
  • the control valve 6 includes a valve body 17, an ejector 18, and a piston structure 100.
  • a cylindrical cylinder 17 a is formed inside the valve body 17, and the raw water inlet (inlet) 9, the soft water outlet (outlet) 10, and salt water are communicated with external piping on the outer surface of the valve body 17.
  • An inlet (inlet) 11 and a drain outlet (outlet) 19 are formed.
  • the piston component 100 is formed in a disc shape with the shaft body 101, a plurality of flanges 102 that are spaced apart from each other in the axial direction of the shaft body 101, and radially outward from the outer peripheral surface of the flange 102. And an annular seal member (not shown) extending along the circumferential direction.
  • the seal member of the piston structure 100 is slidable on the inner peripheral surface of the cylinder 17a, and the piston structure 100 moves in the axial direction with respect to the valve body 17, thereby causing water and salt water ( The flow direction of the target fluid is controlled.
  • Patent Document 1 As such a conventional piston structure, for example, one described in Patent Document 1 is known.
  • the shaft body and the flange are made of a metal material, and are integrally formed by lost wax casting or the like.
  • the shaft member and the flange are placed in another mold for resin molding, and the melted resin material is filled in the groove on the outer periphery of the flange and cured to form a seal member.
  • the seal member is formed so that its cross section gradually becomes wider from the radially outer side to the inner side, and is undercut fitted to the groove on the outer periphery of the flange. With such a configuration, the seal member is prevented from being pulled out of the groove by the force of the target fluid flowing in the cylinder 17a.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a piston structure that can improve the reliability of a seal member and can be easily assembled and replaced, and a control valve using the same. It is said.
  • the present invention proposes the following means. That is, the present invention comprises a shaft body, a disc shape, at least one flange penetrating through the shaft body, and projecting radially outward from the outer peripheral surface of the flange and along the circumferential direction. An annular seal member extending in the direction, wherein the flange includes a pair of flange-like members sandwiching the seal member from both axial sides of the shaft body.
  • the flange includes a pair of flange-like members that sandwich the seal member from both sides in the axial direction.
  • the member can be mounted on the outer peripheral surface of the flange. Therefore, a good seal member can be reliably incorporated into the flange, and the reliability is sufficiently enhanced.
  • the seal member is easily attached to the flange by being sandwiched between the pair of flange-like members, the assembly is easy. Furthermore, when it becomes necessary to replace a deteriorated seal member in use, the seal member can be replaced with another new seal member by separating the pair of flange-shaped members from each other. According to this, unlike the conventional case, when the seal member is deteriorated, it is not necessary to replace the entire piston structure, and the maintenance cost can be reduced.
  • the seal member has an annular shape, and is supported by the flange-shaped member, and protrudes radially outward from the outer peripheral surface of the main body portion.
  • An annular protrusion extending along the direction, and the protrusion gradually decreases in width in the axial direction from the proximal end portion located on the main body portion side toward the distal end portion located radially outward.
  • the axial displacement amount per unit length in the radial direction at the distal end portion may be set smaller than the displacement amount at the proximal end portion.
  • the seal member has an annular shape, and is supported by the flange-shaped member, and protrudes radially outward from the outer peripheral surface of the main body portion.
  • An annular protrusion extending in the direction, and a plurality of the protrusions may be formed on the outer peripheral surface of the main body part so as to be spaced apart from each other in the axial direction.
  • the flange-shaped member has first rib portions protruding from a surface facing the side opposite to the seal member in the axial direction and extending radially in the circumferential direction. It is good also as being formed in multiple numbers.
  • the flange-shaped member is formed with a plurality of second rib portions protruding from a surface facing the side opposite to the seal member in the axial direction at intervals in the circumferential direction.
  • the outer peripheral edge portion of the second rib portion may extend in the axial direction so as to be continuous with the outer peripheral surface of the flange-shaped member.
  • a control valve according to the present invention is characterized by including a valve body in which an inlet and an outlet corresponding to flow direction control of a target fluid are formed, and the above-described piston structure.
  • the reliability of the seal member can be improved and the assembly and replacement can be easily performed.
  • FIG. 2A is a front view showing a flange-like member of the piston structure according to the first embodiment of the present invention
  • FIG. 3B is a view showing a DD cross section in FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which expands and shows the principal part in (a) front view which shows the sealing member of the piston structure which concerns on 1st Embodiment of this invention, (b) Half side sectional view, (c) (b). It is a side view which shows the piston structural body which concerns on 2nd Embodiment of this invention.
  • FIG. 6A is a front view showing a flange-like member of a piston structure according to a second embodiment of the present invention
  • 5B is a diagram showing a cross section taken along line EE in FIG.
  • A Half side sectional view showing a sealing member of a piston structure according to a second embodiment of the present invention, (b) An enlarged view showing a main part in (a), F part in (c) and (b) (D) It is a figure which shows the modification of the projection part of a sealing member.
  • FIGS. 1 to 3 are cross-sectional explanatory views of the resin cylinder 2 and the control valve 6 of the water softener 1, and a salt water tank arranged in parallel with the water softener 1 is not shown.
  • This water softener 1 operates a control valve 6 and is a cycle comprising five steps of (1) backwashing, (2) salt water regeneration, (3) water washing, (4) rapid water washing, and (5) soft water flow. Is performed by automatic playback. Of these steps, FIG. 1 shows a backwash process, FIG. 2 shows a salt water regeneration process and a water wash process, and FIG. 3 shows a soft water flow process.
  • the resin cylinder 2 is a container made of synthetic resin, for example, and a control valve 6 is disposed on the top thereof.
  • a quartzite 3 is laid in the lower part of the resin cylinder 2, and an ion exchange resin 4 is disposed on the upper part of the quartzite 3.
  • a distributor 5a is embedded in the silica 3, and a water collecting pipe 5 is erected upward at the upper end of the distributor 5a and penetrates the ion exchange resin 4. Yes.
  • the upper end of the water collecting pipe 5 communicates with the cylinder 17 a of the control valve 6.
  • the control valve 6 includes a valve body 17 in which an inlet and an outlet corresponding to flow direction control of water and salt water (target fluid) are formed, an ejector 18, a piston structure 20 described later, and a control unit (not shown). ) And. Inside the valve body 17, a cylindrical cylinder 17a and a flow path 17b extending in parallel with the cylinder 17a are formed. Further, a raw water inlet (inlet) 9, a soft water outlet (outlet) 10, a salt water inlet (inlet) 11, and a drain outlet (outlet) 19 are formed on the outer surface of the valve body 17 so as to communicate with the external pipe. ing. The raw water inlet 9, the soft water outlet 10, the salt water inlet 11 and the drain outlet 19 communicate with each other in the cylinder 17a. The raw water inlet 9 and the soft water outlet 10 are opened on the inner peripheral surface of the cylinder 17a.
  • the drain discharge line 7 is connected to the drain outlet 19 of the valve body 17.
  • a salt water line 13 is connected to the salt water inlet 11.
  • the piston component 20 has a shaft 21, a disk shape, at least one flange 22 penetrating the shaft 21, and projects radially outward from the outer peripheral surface of the flange 22. And an annular seal member 23 (see FIGS. 4 and 5) extending along the direction.
  • the piston component 20 is inserted into the cylinder 17 a of the valve body 17.
  • three flanges 22 are disposed apart from each other in the direction of the axis O of the shaft body 21.
  • the seal member 23 of the piston component 20 is slidably in contact with the inner peripheral surface of the cylinder 17 a, and the piston component 20 moves in the direction of the axis O with respect to the valve body 17.
  • the flow direction of the target fluid indicated by the arrow in the figure is controlled.
  • the shaft body 21 of the piston component 20 protrudes most from the outer surface of the valve body 17 toward one side in the direction of the axis O (left side in FIG. 1).
  • the shaft body 21 is inserted into the valve body 17 on the other side in the axis O direction (the right side in FIG. 3), and in FIG. 2, the axis O of the shaft body 21 with respect to the valve body 17 is shown.
  • the position in the direction is an intermediate state between FIGS.
  • the shaft body 21 of the piston component 20 is made of a metal material, and as shown in FIG. 4, the end on one side (left side in FIG. 4) in the direction of the axis O is on the other side (in FIG. 4). The diameter is smaller than other portions located on the right side).
  • a through hole 21 a extending in the radial direction is formed at one end of the shaft body 21.
  • a screw hole 21b extending in the axis O direction is formed in the other end face of the shaft body 21.
  • a pin mounting hole 21c is formed in a substantially central portion of the shaft body 21 in the axis O direction so as to penetrate in the radial direction, and a split pin 24 is inserted into the pin mounting hole 21c.
  • the three flanges 22 have the same structure. Among these flanges 22, the flange 22 a disposed at the substantially central portion of the shaft body 21 is disposed at the other end of the shaft body 21. The flange 22c is disposed between the flange 22c and the flange 22c.
  • annular groove 27 extending along the circumferential direction is formed in the central portion of the inner circumferential surface of the flange 22 in the axis O direction (left-right direction in FIG. 5). Is provided with an O-ring 28. Further, an annular seal member mounting groove 36 extending along the circumferential direction is formed in the central portion of the outer peripheral surface of the flange 22 in the axis O direction, and the seal member 23 is disposed in the seal member mounting groove 36. Has been.
  • a pair of washers 26 are disposed in contact with both end faces of the flange 22 in the axis O direction.
  • the washer 26 located on one side of the flange 22a is in contact with the split pin 24 from the other side.
  • a cylindrical spacer 29 is externally fitted to the shaft body 21 between the flange 22a and the flange 22b, and both end surfaces of the spacer 29 are located on the other side of the flange 22a and the flange 22b. It is contact
  • a cylindrical spacer 30 is externally fitted to the shaft body 21 between the flange 22b and the flange 22c, and both end surfaces of the spacer 30 are located on the other side of the flange 22b and the flange 22c. It is contact
  • the spacer 29 and the spacer 30 have substantially the same inner diameter and outer diameter, and the length of the spacer 29 in the axis O direction is set larger than the length of the spacer 30 in the axis O direction.
  • a drain seal cylinder 31 having an inner diameter substantially the same as the spacers 29 and 30 and having an outer diameter larger than that of the spacers 29 and 30 is provided on the other side (right side in FIG. 5) of the flange 22c. 21 is externally fitted.
  • An end face on one side (left side in FIG. 5) of the drain seal cylinder 31 is in contact with a washer 26 located on the other side of the flange 22c.
  • An annular groove 31a extending in the circumferential direction is formed in the radially inner portion of the end surface on one side of the drain seal cylinder 31, and an O-ring 32 is disposed in the groove 31a.
  • the other end portion of the drain seal cylinder 31 protrudes slightly toward the other side from the other end portion of the shaft body 21.
  • a rosette washer 33 is in contact with the other end face of the drain seal cylinder 31 from the other side, and a round countersunk screw 34 is inserted into the rosette washer 33 from the other side.
  • the round countersunk screw 34 is screwed into the screw hole 21 b of the shaft body 21.
  • An annular groove 31b extending along the circumferential direction is formed on the outer peripheral surface of the drain seal cylinder 31, and an O-ring 35 is disposed in the groove 31b.
  • the flange 22 has a disk-like shape and includes a pair of flange-like members 25 that sandwich the seal member 23 from both sides of the shaft body 21 in the axis O direction.
  • the flange-shaped member 25 is made of, for example, a slidable resin material, and POM (polyacetal) is used in this embodiment.
  • the pair of flange-like members 25 are arranged in the back direction in a state where the smooth back surfaces 25a facing the axis O direction are in contact with each other.
  • the radially inner end of the rear surface 25a of the flange-shaped member 25 has an annular shape extending along the circumferential direction, and its longitudinal section extends from the radially outer side to the inner side.
  • a taper portion 25b is formed so as to gradually move away from the back surface 25a in the direction of the axis O as it goes. Then, when the pair of flange-like members 25 are disposed in the back direction, the region defined by the taper portions 25b and 25b is the groove 27 described above.
  • annular recess 25c that is recessed in the axis O direction from the back surface 25a and extends along the circumferential direction is formed at the radially outer end of the back surface 25a of the flange-shaped member 25.
  • An annular protrusion 25d whose tip height in the axis O direction is set lower than that of the back surface 25a is formed at the radially outer end of the recess 25c.
  • the flange-like member 25 has a first rib portion 37 that protrudes from the surface 25e facing the side opposite to the seal member 23 and the back surface 25a in the axis O direction and extends in the radial direction. A plurality are formed at intervals.
  • An annular boss portion 38 that protrudes from the surface 25e and extends in the circumferential direction is formed at the radially inner end portion of the surface 25e of the flange-shaped member 25.
  • the first rib portion 37 is a boss portion. It is formed so as to extend radially outward from the outer peripheral surface of the portion 38.
  • a plurality of second rib portions 39 protruding from the surface 25e are formed at intervals in the circumferential direction.
  • the second rib portion 39 is integrally formed so as to continue to the radially outer side of the first rib portion 37.
  • the protruding height of the second rib portion 39 (the height protruding from the surface 25e in the axis O direction) is set to be larger than the protruding height of the first rib portion 37, and the outer peripheral edge portion of the second rib portion 39 is , And extends in the direction of the axis O so as to be continuous with the outer peripheral surface of the flange-shaped member 25.
  • the seal member 23 has a ring-shaped main body portion 40 supported by the flange-like member 25, and protrudes radially outward from the outer peripheral surface 40 a of the main body portion 40 and in the circumferential direction. And an annular protrusion 41 extending along the line.
  • the seal member 23 is made of, for example, an elastic body such as rubber. In the present embodiment, hydrogenated nitrile rubber is used.
  • the width dimension of the main body 40 in the axis O direction is set to be substantially the same as or slightly larger than the width dimension of the seal member mounting groove 36. Further, the width dimension of the protrusion 41 in the axis O direction is set slightly smaller than the interval between the annular protrusions 25d and 25d facing each other in the flange 22.
  • the radially outer end of the protrusion 41 is a convex curved surface whose longitudinal section forms a semicircular shape.
  • the end portion of the projection 41 protrudes from the outer peripheral surface of the flange 22 outward in the radial direction.
  • the outer peripheral surface 40a of the main body 40 is in contact with the annular protrusion 25d of the flange-like member 25 from the radially inner side.
  • the flange 22 includes the pair of flange-like members 25 that sandwich the seal member 23 from both sides in the axis O direction.
  • the seal member 23 can be mounted in the seal member mounting groove 36 on the outer peripheral surface of the flange 22 in a state where substantially the entire member 23 is visible. Therefore, a good seal member 23 can be reliably incorporated into the flange 22 and the reliability is sufficiently enhanced.
  • the seal member 23 is easily attached to the flange 22 by being sandwiched between the pair of flange-like members 25, the assembly is easy. Further, when it becomes necessary to replace the deteriorated seal member 23 after being used, the pair of flange-like members 25 are separated from each other in the direction of the axis O, so that the seal member 23 is replaced with another new seal member 23. And can be exchanged. According to this, unlike the conventional case, when the seal member is deteriorated, it is not necessary to replace the entire piston structure, and the maintenance cost can be reduced.
  • the flange-like member 25 is formed with a plurality of first rib portions 37 protruding from the surface 25e and extending in the radial direction at intervals in the circumferential direction, the rigidity of the flange 22 is ensured.
  • the flange-like member 25 has a plurality of second rib portions 39 protruding from the surface 25e at intervals in the circumferential direction, and the outer peripheral edge portion of the second rib portion 39 is the flange-like member 25. Since the outer peripheral edge slides on the inner peripheral surface of the cylinder 17a, the piston component 20 is accurately moved in the axis O direction with respect to the valve body 17. I will guide you. Thereby, the axial displacement of the piston structure 20 with respect to the cylinder 17a is prevented, and the movement in the direction of the axis O is stably performed with high accuracy. Since the flange-like member 25 is made of a resin material having slidability, the outer peripheral edge portion is prevented from damaging the inner peripheral surface of the cylinder 17a.
  • the seal member 23 is sealed by the force of the target fluid flowing in the cylinder 17a. Pulling out from the inside is prevented.
  • the flow direction control of the target fluid can be stably and accurately performed.
  • the structures of the flange 52 and the seal member 53 are different from those of the flange 22 and the seal member 23 described above.
  • the flange 52 of the piston structure 50 has a disk shape and includes a pair of flange-like members 55 that sandwich the seal member 53 from both sides of the shaft body 21 in the axis O direction.
  • the pair of flange-like members 55 are arranged in the back direction with the back surfaces 55a facing the axis O direction facing each other.
  • the end on the back surface 55a side in the axis O direction is the other side opposite to the back surface 55a in the axis O direction than this end portion.
  • the diameter of the groove portion 55b is larger than that of the groove portion 55b.
  • the flange-like member 55 is formed with a plurality of third rib portions 57 that protrude from the back surface 55a and extend in the radial direction at intervals in the circumferential direction.
  • the radially inner end portion of the third rib portion 57 is formed to protrude from the back surface 55a and is connected to the outer peripheral edge portion of the boss portion 58 having an annular shape around the axis O.
  • the radially outer end portion of the third rib portion 57 is formed to protrude from the back surface 55a and is connected to the inner peripheral edge portion of the smooth portion 59 having an annular shape around the axis O.
  • Projection heights in the axis O direction from the back surface 55a of the third rib portion 57, the boss portion 58, and the smooth portion 59 are the same. Then, the pair of flange-like members 55 are arranged in the back direction with the third rib portions 57, the boss portions 58, and the smooth portions 59 in contact with each other.
  • annular recess 55c that is recessed in the axis O direction from the smoothing portion 59 and extends in the circumferential direction is formed at the radially outer end of the back surface 55a of the flange-shaped member 55.
  • An annular protrusion 55d whose tip height in the axis O direction is set lower than that of the smooth portion 59 is formed at the radially outer end of the recess 55c.
  • the surface 55e facing the side opposite to the seal member 53 and the back surface 55a in the axis O direction is chamfered at the radially outer end. Except for being processed, the surface is substantially smooth.
  • the seal member 53 has an annular main body 60 supported by the flange-like member 55 and an outer circumferential surface 63 a of the main body 60 directed radially outward. And an annular protrusion 61 that extends along the circumferential direction.
  • a portion located radially inward in the main body 60 is an inner portion 62 supported by the flange-like member 55.
  • a portion located radially outward in the main body portion 60 is an outer portion 63 formed with a width dimension in the axis O direction smaller than that of the inner portion 62.
  • the width dimension in the axis O direction of the inner portion 62 of the main body 60 is set to be substantially the same as or slightly larger than the width dimension of the seal member mounting groove 36.
  • the width dimension in the axis O direction of the outer portion 63 of the main body 60 is set slightly smaller than the interval between the annular protrusions 55 d and 55 d facing each other in the flange 52.
  • the outer peripheral surface 62 a of the inner portion 62 is in contact with the annular protrusion 55 d of the flange-like member 55 from the radially inner side.
  • the protrusion 61 is formed so as to protrude from the outer peripheral surface 63 a of the outer portion 63.
  • the protrusion 61 is formed such that the width in the direction of the axis O gradually decreases from the proximal end portion located on the main body portion 60 side toward the distal end portion located radially outward.
  • a plurality of protrusions 61 are formed on the outer peripheral surface 63 a of the main body 60 so as to be spaced apart in the axis O direction.
  • a pair of protrusions 61 are formed on both ends of the outer peripheral surface 63a in the direction of the axis O, and both side surfaces of the protrusion 61 facing the direction of the axis O are tapered.
  • FIG. 10D shows a modified example of the protrusion 61.
  • the protrusion 61 has a displacement amount in the direction of the axis O per unit length in the radial direction at the distal end portion set to be smaller than the displacement amount at the proximal end portion. Both side surfaces facing the direction are concavely curved.
  • the radially outer end of the protrusion 61 is disposed so as to protrude radially outward from the outer peripheral surface of the flange 52.
  • the same effects as those of the piston structure 20 described above can be obtained, and the following effects can be achieved. That is, since the third rib portion 57 is formed on the flange-shaped member 55, the surface 55e exposed in the cylinder 17a is a substantially smooth surface while ensuring the rigidity of the flange-shaped member 55. The flange-like member 55 is unlikely to become a resistance of the target fluid.
  • the protrusion 61 of the seal member 53 is formed so that the width in the direction of the axis O gradually decreases from the base end portion toward the tip end portion, the rigidity of the protrusion 61 is secured.
  • the sliding resistance with the inner peripheral surface of the cylinder 17a can be reduced. Accordingly, the piston component 50 moves smoothly in the cylinder 17a, and the deterioration and breakage of the seal member 53 are suppressed, and the sealing performance of the target fluid is stably secured.
  • the displacement amount in the axis O direction per unit length in the radial direction at the distal end portion of the protrusion 61 is set smaller than the displacement amount at the proximal end portion. In this case, the above-mentioned sliding resistance is further reduced, which is desirable.
  • the sealing performance of the target fluid is further improved.
  • the water softener 1 operates the control valve 6 to perform a cycle consisting of five steps by the automatic regeneration operation, and the piston components 20 and 50 are mutually connected in the direction of the axis O of the shaft body 21.
  • the three flanges 22 and 52 are spaced apart from each other, the present invention is not limited to this. That is, the number of steps of the water softener 1 is appropriately set according to various purposes, and the number of the flanges 22 and 52 of the piston components 20 and 50 may be appropriately determined according to the number of steps.
  • the second rib portion 39 is integrally formed so as to be continuous with the radially outer side of the first rib portion 37.
  • the present invention is not limited to this. However, they may be formed separately from each other.
  • piston structural bodies 20 and 50 and the control valve 6 using the same are applicable to uses other than the water softener 1 described above.
  • oils, solvents, acid or alkali solutions, other solutions, etc. other than the water and salt water described above can be used as the target fluid.
  • the material of each component (shaft body 21, flanges 22, 52, seal members 23, 53, etc.) of the piston components 20 and 50 can be appropriately replaced with a well-known material according to the target fluid.
  • Control valve 9 Raw water inlet (inlet) 10 Soft water outlet (outlet) 11 Saltwater inlet (inlet) 17 Valve body 19 Drain outlet (outlet) 20, 50 Piston component 21 Shaft body 22, 52 Flange 23, 53 Seal member 25, 55 Flange-like member 25e Surface 37 First rib portion 39 Second rib portion 40, 60 Main body portion 40a, 63a Outer peripheral surface 41 of main body portion 61 Projection O-axis

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Sealing Devices (AREA)
  • Sliding Valves (AREA)
  • Multiple-Way Valves (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

Disclosed is a piston structure (20) provided with a shaft (21), at least one disc-shaped flange (22) penetrated by the shaft (21), and an annular sealing member (23) outwardly projecting from the outer peripheral surface of the flange (22) in the radial direction and extending in the circumferential direction, wherein the flange (22) is provided with a pair of flange-like members (25) which hold the sealing member (23) therebetween from the opposite sides in the axial direction of the shaft (21). Therefore, it is possible to provide a piston structure wherein assembling and replacing can be easily performed.

Description

ピストン構成体及びコントロールバルブPiston component and control valve
　本発明は、例えば軟水器に用いられるピストン構成体及びコントロールバルブに関するものである。 The present invention relates to a piston structure and a control valve used for, for example, a water softener.
　例えば、ボイラ、温水器あるいは冷却器等の冷熱機器類への給水ラインには、冷熱機器内でのスケール付着を防止する必要から、給水に含まれる硬度分を除去するための装置が接続されており、なかでも、イオン交換樹脂を用いて硬度分を除去する方式の自動再生式軟水器が広く普及している。この種の軟水器は、塩水タンクとイオン交換樹脂を充填した樹脂筒からなり、この樹脂筒の上部に配設されたコントロールバルブを作動して、（１）逆洗、（２）塩水再生、（３）水洗、（４）急速水洗、（５）軟水通水、等の複数工程のサイクルを自動再生動作により行っている。 For example, a device for removing the hardness contained in the water supply is connected to the water supply line to the cooling / heating equipment such as a boiler, a water heater or a cooler because it is necessary to prevent scale adhesion in the cooling / heating equipment. In particular, an automatic regenerative water softener that uses an ion exchange resin to remove hardness is widely used. This type of water softener is composed of a salt water tank and a resin cylinder filled with an ion exchange resin, and operates a control valve disposed at the top of the resin cylinder to (1) backwash, (2) salt water regeneration, A cycle of a plurality of steps such as (3) water washing, (4) rapid water washing, and (5) soft water flow is performed by an automatic regeneration operation.
　図１～図３に示すように、コントロールバルブ６は、バルブボディー１７、エゼクター１８、及び、ピストン構成体１００を備えている。バルブボディー１７の内部には、筒状のシリンダー１７ａが形成されており、バルブボディー１７の外面には、外部配管と連通して原水入口（流入口）９、軟水出口（流出口）１０、塩水入口（流入口）１１、及び、ドレン出口（流出口）１９が形成されている。 As shown in FIGS. 1 to 3, the control valve 6 includes a valve body 17, an ejector 18, and a piston structure 100. A cylindrical cylinder 17 a is formed inside the valve body 17, and the raw water inlet (inlet) 9, the soft water outlet (outlet) 10, and salt water are communicated with external piping on the outer surface of the valve body 17. An inlet (inlet) 11 and a drain outlet (outlet) 19 are formed.
　また、ピストン構成体１００は、軸体１０１と、円板状をなし、軸体１０１の軸方向に互いに離間して配設された複数のフランジ１０２と、フランジ１０２の外周面から径方向外方へ向けて突設されるとともに周方向に沿って延びる環状のシール部材（不図示）と、を備えている。そして、シリンダー１７ａの内周面にピストン構成体１００の前記シール部材が摺動可能とされているとともに、バルブボディー１７に対してピストン構成体１００が軸方向に移動することにより、水及び塩水（対象流体）の流通方向が制御されている。 Further, the piston component 100 is formed in a disc shape with the shaft body 101, a plurality of flanges 102 that are spaced apart from each other in the axial direction of the shaft body 101, and radially outward from the outer peripheral surface of the flange 102. And an annular seal member (not shown) extending along the circumferential direction. The seal member of the piston structure 100 is slidable on the inner peripheral surface of the cylinder 17a, and the piston structure 100 moves in the axial direction with respect to the valve body 17, thereby causing water and salt water ( The flow direction of the target fluid is controlled.
　このような従来のピストン構成体として、例えば特許文献１に記載されたものが知られている。特許文献１のピストン構成体では、軸体及びフランジが金属材料からなるとともに、ロストワックス鋳造等により一体に成形されている。そして、この軸体及びフランジを樹脂成形用の別のモールド内に配置して、フランジ外周の溝内に溶融した樹脂材料を充填し硬化させることにより、シール部材が成形されている。シール部材は、その断面が径方向外方から内方へ向かうに従い漸次幅広となるように形成されているとともに、フランジ外周の前記溝に対してアンダーカット嵌合されている。このような構成によって、シール部材が、シリンダー１７ａ内を流れる対象流体の力によって前記溝内から引き出されることが防止されている。 As such a conventional piston structure, for example, one described in Patent Document 1 is known. In the piston structure of Patent Document 1, the shaft body and the flange are made of a metal material, and are integrally formed by lost wax casting or the like. The shaft member and the flange are placed in another mold for resin molding, and the melted resin material is filled in the groove on the outer periphery of the flange and cured to form a seal member. The seal member is formed so that its cross section gradually becomes wider from the radially outer side to the inner side, and is undercut fitted to the groove on the outer periphery of the flange. With such a configuration, the seal member is prevented from being pulled out of the groove by the force of the target fluid flowing in the cylinder 17a.
特表２００８－５２８２５４号公報Special table 2008-528254 gazette
　しかしながら、この種のピストン構成体においては、シール部材のさらなる信頼性の向上や、組立・交換の容易性が要求されていた。 However, in this type of piston structure, further improvement in the reliability of the seal member and ease of assembly and replacement are required.
　本発明は、このような事情に鑑みてなされたものであり、シール部材の信頼性を向上できるとともに、組立・交換を容易に行えるピストン構成体及びこれを用いたコントロールバルブを提供することを目的としている。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a piston structure that can improve the reliability of a seal member and can be easily assembled and replaced, and a control valve using the same. It is said.
　前記目的を達成するために、本発明は以下の手段を提案している。
　すなわち本発明は、軸体と、円板状をなし、前記軸体に貫通される少なくとも１つのフランジと、前記フランジの外周面から径方向外方へ向けて突設されるとともに周方向に沿って延びる環状のシール部材と、を備えたピストン構成体であって、前記フランジは、前記軸体の軸方向の両側から前記シール部材を挟む一対のフランジ状部材を備えることを特徴とする。 In order to achieve the above object, the present invention proposes the following means.
That is, the present invention comprises a shaft body, a disc shape, at least one flange penetrating through the shaft body, and projecting radially outward from the outer peripheral surface of the flange and along the circumferential direction. An annular seal member extending in the direction, wherein the flange includes a pair of flange-like members sandwiching the seal member from both axial sides of the shaft body.
　本発明に係るピストン構成体によれば、フランジが、軸方向の両側からシール部材を挟む一対のフランジ状部材を備えているので、製造時に、シール部材の略全体を視認できる状態で、該シール部材をフランジの外周面に装着できる。従って、フランジに対して良品のシール部材を確実に組み込むことができ、信頼性が十分に高められる。 According to the piston structure of the present invention, the flange includes a pair of flange-like members that sandwich the seal member from both sides in the axial direction. The member can be mounted on the outer peripheral surface of the flange. Therefore, a good seal member can be reliably incorporated into the flange, and the reliability is sufficiently enhanced.
　また、シール部材は、一対のフランジ状部材に挟まれることで簡便にフランジに装着されることから、組立が容易である。
　さらに、使用に供されて劣化したシール部材を交換する必要が生じた際には、一対のフランジ状部材を互いに離間させることで該シール部材を他の新しいシール部材と交換可能である。これによれば、従来のように、シール部材が劣化した際にピストン構成体の全体を交換する必要がなく、メンテナンス費用が削減できる。 Further, since the seal member is easily attached to the flange by being sandwiched between the pair of flange-like members, the assembly is easy.
Furthermore, when it becomes necessary to replace a deteriorated seal member in use, the seal member can be replaced with another new seal member by separating the pair of flange-shaped members from each other. According to this, unlike the conventional case, when the seal member is deteriorated, it is not necessary to replace the entire piston structure, and the maintenance cost can be reduced.
　また、本発明に係るピストン構成体において、前記シール部材は、環状をなし、前記フランジ状部材に支持される本体部と、前記本体部の外周面から径方向外方へ向けて突出するとともに周方向に沿って延びる環状の突起部と、を備え、前記突起部は、前記本体部側に位置する基端部分から径方向外方に位置する先端部分へ向かうに従い漸次前記軸方向の幅が狭くなるように形成されているとともに、前記先端部分における径方向の単位長さあたりの前記軸方向の変位量が、前記基端部分における前記変位量よりも小さく設定されることとしてもよい。 Further, in the piston structure according to the present invention, the seal member has an annular shape, and is supported by the flange-shaped member, and protrudes radially outward from the outer peripheral surface of the main body portion. An annular protrusion extending along the direction, and the protrusion gradually decreases in width in the axial direction from the proximal end portion located on the main body portion side toward the distal end portion located radially outward. The axial displacement amount per unit length in the radial direction at the distal end portion may be set smaller than the displacement amount at the proximal end portion.
　また、本発明に係るピストン構成体において、前記シール部材は、環状をなし、前記フランジ状部材に支持される本体部と、前記本体部の外周面から径方向外方へ向けて突出するとともに周方向に沿って延びる環状の突起部と、を備え、前記突起部は、前記本体部の外周面に前記軸方向に離間して複数形成されていることとしてもよい。 Further, in the piston structure according to the present invention, the seal member has an annular shape, and is supported by the flange-shaped member, and protrudes radially outward from the outer peripheral surface of the main body portion. An annular protrusion extending in the direction, and a plurality of the protrusions may be formed on the outer peripheral surface of the main body part so as to be spaced apart from each other in the axial direction.
　また、本発明に係るピストン構成体において、前記フランジ状部材には、前記軸方向における前記シール部材とは反対側を向く面から突出するとともに径方向に延びる第１リブ部が周方向に間隔をあけて複数形成されていることとしてもよい。 Further, in the piston structure according to the present invention, the flange-shaped member has first rib portions protruding from a surface facing the side opposite to the seal member in the axial direction and extending radially in the circumferential direction. It is good also as being formed in multiple numbers.
　また、本発明に係るピストン構成体において、前記フランジ状部材には、前記軸方向における前記シール部材とは反対側を向く面から突出する第２リブ部が周方向に間隔をあけて複数形成され、前記第２リブ部の外周縁部は、前記フランジ状部材の外周面に連なるように前記軸方向に延びていることとしてもよい。 In the piston structure according to the present invention, the flange-shaped member is formed with a plurality of second rib portions protruding from a surface facing the side opposite to the seal member in the axial direction at intervals in the circumferential direction. The outer peripheral edge portion of the second rib portion may extend in the axial direction so as to be continuous with the outer peripheral surface of the flange-shaped member.
　また、本発明に係るコントロールバルブは、対象流体の流通方向制御に対応する流入口及び流出口が形成されたバルブボディーと、前述のピストン構成体と、を備えたことを特徴とする。 Further, a control valve according to the present invention is characterized by including a valve body in which an inlet and an outlet corresponding to flow direction control of a target fluid are formed, and the above-described piston structure.
　本発明に係るピストン構成体及びこれを用いたコントロールバルブによれば、シール部材の信頼性を向上できるとともに、組立・交換を容易に行える。 According to the piston structure and the control valve using the same according to the present invention, the reliability of the seal member can be improved and the assembly and replacement can be easily performed.
（ａ）ピストン構成体及びコントロールバルブを備えた軟水器の概略構造を説明する側断面図、（ｂ）（ａ）におけるＡ部の正断面図である。(A) Side sectional drawing explaining schematic structure of water softener provided with piston structure and control valve, (b) It is a front sectional view of the A section in (a). （ａ）ピストン構成体及びコントロールバルブを備えた軟水器の概略構造を説明する側断面図、（ｂ）（ａ）におけるＢ部の正断面図である。(A) Side sectional drawing explaining schematic structure of water softener provided with piston structure and control valve, (b) It is a front sectional view of the B section in (a). ピストン構成体及びコントロールバルブを備えた軟水器の概略構造を説明する側断面図である。It is a sectional side view explaining the schematic structure of the water softener provided with the piston structure and the control valve. 本発明の第１実施形態に係るピストン構成体を示す部分側断面図である。It is a fragmentary sectional side view which shows the piston structure which concerns on 1st Embodiment of this invention. 図４のピストン構成体のＣ部を拡大して示す図である。It is a figure which expands and shows the C section of the piston structure of FIG. 本発明の第１実施形態に係るピストン構成体のフランジ状部材を示す（ａ）正面図、（ｂ）（ａ）におけるＤ－Ｄ断面を示す図である。FIG. 2A is a front view showing a flange-like member of the piston structure according to the first embodiment of the present invention, and FIG. 3B is a view showing a DD cross section in FIG. 本発明の第１実施形態に係るピストン構成体のシール部材を示す（ａ）正面図、（ｂ）半側断面図、（ｃ）（ｂ）における要部を拡大して示す図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which expands and shows the principal part in (a) front view which shows the sealing member of the piston structure which concerns on 1st Embodiment of this invention, (b) Half side sectional view, (c) (b). 本発明の第２実施形態に係るピストン構成体を示す側面図である。It is a side view which shows the piston structural body which concerns on 2nd Embodiment of this invention. 本発明の第２実施形態に係るピストン構成体のフランジ状部材を示す（ａ）正面図、（ｂ）（ａ）におけるＥ－Ｅ断面を示す図、（ｃ）背面図である。FIG. 6A is a front view showing a flange-like member of a piston structure according to a second embodiment of the present invention, FIG. 5B is a diagram showing a cross section taken along line EE in FIG. 本発明の第２実施形態に係るピストン構成体のシール部材を示す（ａ）半側断面図、（ｂ）（ａ）における要部を拡大して示す図、（ｃ）（ｂ）におけるＦ部を拡大して示す図、（ｄ）シール部材の突起部の変形例を示す図である。(A) Half side sectional view showing a sealing member of a piston structure according to a second embodiment of the present invention, (b) An enlarged view showing a main part in (a), F part in (c) and (b) (D) It is a figure which shows the modification of the projection part of a sealing member.
（第１実施形態）
　図１～図３は、軟水器１の樹脂筒２とコントロールバルブ６の断面説明図であり、軟水器１に並設の塩水タンクは図示を省略している。
　この軟水器１は、コントロールバルブ６を作動して、（１）逆洗、（２）塩水再生、（３）水洗、（４）急速水洗、（５）軟水通水、の５工程からなるサイクルを自動再生動作により行っている。尚、これら各工程のうち、図１は逆洗工程、図２は塩水再生工程及び水洗工程、図３は軟水通水工程を示している。 (First embodiment)
FIGS. 1 to 3 are cross-sectional explanatory views of the resin cylinder 2 and the control valve 6 of the water softener 1, and a salt water tank arranged in parallel with the water softener 1 is not shown.
This water softener 1 operates a control valve 6 and is a cycle comprising five steps of (1) backwashing, (2) salt water regeneration, (3) water washing, (4) rapid water washing, and (5) soft water flow. Is performed by automatic playback. Of these steps, FIG. 1 shows a backwash process, FIG. 2 shows a salt water regeneration process and a water wash process, and FIG. 3 shows a soft water flow process.
　樹脂筒２は、例えば合成樹脂製の容器であって、その上部にはコントロールバルブ６が配設されている。樹脂筒２内の下部には、けい石３が敷設されており、このけい石３の上部にはイオン交換樹脂４が配設されている。また、けい石３内にはディストリビューター５ａが埋設されており、ディストリビューター５ａの上端部には、上方へ向けて集水パイプ５が立設されているとともに、イオン交換樹脂４を貫通している。集水パイプ５の上端部は、コントロールバルブ６のシリンダー１７ａ内に連通している。 The resin cylinder 2 is a container made of synthetic resin, for example, and a control valve 6 is disposed on the top thereof. A quartzite 3 is laid in the lower part of the resin cylinder 2, and an ion exchange resin 4 is disposed on the upper part of the quartzite 3. Further, a distributor 5a is embedded in the silica 3, and a water collecting pipe 5 is erected upward at the upper end of the distributor 5a and penetrates the ion exchange resin 4. Yes. The upper end of the water collecting pipe 5 communicates with the cylinder 17 a of the control valve 6.
　コントロールバルブ６は、水及び塩水（対象流体）の流通方向制御に対応する流入口及び流出口が形成されたバルブボディー１７と、エゼクター１８と、後述するピストン構成体２０と、制御部（不図示）と、を備えている。バルブボディー１７の内部には、筒状のシリンダー１７ａと、該シリンダー１７ａに並行して延びる流路１７ｂと、が形成されている。また、バルブボディー１７の外面には、外部配管と連通して原水入口（流入口）９、軟水出口（流出口）１０、塩水入口（流入口）１１及びドレン出口（流出口）１９が形成されている。これら原水入口９、軟水出口１０、塩水入口１１及びドレン出口１９は、シリンダー１７ａ内に連通している。尚、原水入口９及び軟水出口１０は、シリンダー１７ａの内周面に開口している。 The control valve 6 includes a valve body 17 in which an inlet and an outlet corresponding to flow direction control of water and salt water (target fluid) are formed, an ejector 18, a piston structure 20 described later, and a control unit (not shown). ) And. Inside the valve body 17, a cylindrical cylinder 17a and a flow path 17b extending in parallel with the cylinder 17a are formed. Further, a raw water inlet (inlet) 9, a soft water outlet (outlet) 10, a salt water inlet (inlet) 11, and a drain outlet (outlet) 19 are formed on the outer surface of the valve body 17 so as to communicate with the external pipe. ing. The raw water inlet 9, the soft water outlet 10, the salt water inlet 11 and the drain outlet 19 communicate with each other in the cylinder 17a. The raw water inlet 9 and the soft water outlet 10 are opened on the inner peripheral surface of the cylinder 17a.
　また、バルブボディー１７のドレン出口１９には、ドレン排出ライン７が接続されている。また、塩水入口１１には、塩水ライン１３が接続されている。 The drain discharge line 7 is connected to the drain outlet 19 of the valve body 17. A salt water line 13 is connected to the salt water inlet 11.
　ピストン構成体２０は、軸体２１と、円板状をなし、軸体２１に貫通される少なくとも１つのフランジ２２と、フランジ２２の外周面から径方向外方へ向けて突設されるとともに周方向に沿って延びる環状のシール部材２３（図４、図５参照）と、を備えている。ピストン構成体２０は、バルブボディー１７のシリンダー１７ａ内に挿入されている。図示の例では、軸体２１の軸Ｏ方向に互いに離間して、３つのフランジ２２が配設されている。 The piston component 20 has a shaft 21, a disk shape, at least one flange 22 penetrating the shaft 21, and projects radially outward from the outer peripheral surface of the flange 22. And an annular seal member 23 (see FIGS. 4 and 5) extending along the direction. The piston component 20 is inserted into the cylinder 17 a of the valve body 17. In the example shown in the figure, three flanges 22 are disposed apart from each other in the direction of the axis O of the shaft body 21.
　図１～図３において、ピストン構成体２０のシール部材２３は、シリンダー１７ａの内周面に摺動可能に当接しており、バルブボディー１７に対して該ピストン構成体２０が軸Ｏ方向に移動することにより、図中に矢印で示す対象流体の流通方向が制御されている。尚、図１においては、ピストン構成体２０の軸体２１がバルブボディー１７の外面から軸Ｏ方向の一方側（図１における左側）に向けて最も突出した状態とされており、図３においては、軸体２１がバルブボディー１７に対して軸Ｏ方向の他方側（図３における右側）に最も挿し入れられた状態とされており、図２においては、バルブボディー１７に対する軸体２１の軸Ｏ方向の位置が図１及び図３の中間の状態とされている。
　軟水器１の前記各工程のバルブボディー１７に対するピストン構成体２０の軸Ｏ方向の位置、及び、対象流体の流通方向については、実開平６－２４７９３号公報等において周知であるので、ここでは説明を省略する。 1 to 3, the seal member 23 of the piston component 20 is slidably in contact with the inner peripheral surface of the cylinder 17 a, and the piston component 20 moves in the direction of the axis O with respect to the valve body 17. By doing so, the flow direction of the target fluid indicated by the arrow in the figure is controlled. In FIG. 1, the shaft body 21 of the piston component 20 protrudes most from the outer surface of the valve body 17 toward one side in the direction of the axis O (left side in FIG. 1). The shaft body 21 is inserted into the valve body 17 on the other side in the axis O direction (the right side in FIG. 3), and in FIG. 2, the axis O of the shaft body 21 with respect to the valve body 17 is shown. The position in the direction is an intermediate state between FIGS.
The position of the piston structure 20 in the direction of the axis O with respect to the valve body 17 in each step of the water softener 1 and the flow direction of the target fluid are well known in Japanese Utility Model Publication No. 6-24793, etc., and will be described here. Is omitted.
　ピストン構成体２０の軸体２１は、金属材料からなり、図４に示すように、軸Ｏ方向の一方側（図４における左側）の端部が、この端部よりも他方側（図４における右側）に位置する他の部分よりも縮径されている。軸体２１の一方側の端部には、径方向に延びる貫通孔２１ａが形成されている。また、軸体２１の他方側の端面には、軸Ｏ方向に延びるネジ穴２１ｂが穿設されている。また、軸体２１の軸Ｏ方向の略中央部には、径方向に貫通してピン装着孔２１ｃが形成されているとともに、このピン装着孔２１ｃには割りピン２４が挿入されている。 The shaft body 21 of the piston component 20 is made of a metal material, and as shown in FIG. 4, the end on one side (left side in FIG. 4) in the direction of the axis O is on the other side (in FIG. 4). The diameter is smaller than other portions located on the right side). A through hole 21 a extending in the radial direction is formed at one end of the shaft body 21. Further, a screw hole 21b extending in the axis O direction is formed in the other end face of the shaft body 21. A pin mounting hole 21c is formed in a substantially central portion of the shaft body 21 in the axis O direction so as to penetrate in the radial direction, and a split pin 24 is inserted into the pin mounting hole 21c.
　３つのフランジ２２は、互いに同一構造からなり、これらフランジ２２のうち、軸体２１の略中央部に配置されたものがフランジ２２ａ、軸体２１の他端側の端部に配置されたものがフランジ２２ｃ、フランジ２２ａとフランジ２２ｃとの間に配置されたものがフランジ２２ｂとされている。 The three flanges 22 have the same structure. Among these flanges 22, the flange 22 a disposed at the substantially central portion of the shaft body 21 is disposed at the other end of the shaft body 21. The flange 22c is disposed between the flange 22c and the flange 22c.
　これらフランジ２２は、軸体２１に嵌め合わされている。図５に示すように、フランジ２２の内周面における軸Ｏ方向（図５における左右方向）の中央部には、周方向に沿って延びる環状の溝２７が形成されており、この溝２７にはＯリング２８が配設されている。また、フランジ２２の外周面における軸Ｏ方向の中央部には、周方向に沿って延びる環状のシール部材装着溝３６が形成されており、このシール部材装着溝３６にはシール部材２３が配設されている。 These flanges 22 are fitted to the shaft body 21. As shown in FIG. 5, an annular groove 27 extending along the circumferential direction is formed in the central portion of the inner circumferential surface of the flange 22 in the axis O direction (left-right direction in FIG. 5). Is provided with an O-ring 28. Further, an annular seal member mounting groove 36 extending along the circumferential direction is formed in the central portion of the outer peripheral surface of the flange 22 in the axis O direction, and the seal member 23 is disposed in the seal member mounting groove 36. Has been.
　また、フランジ２２の軸Ｏ方向の両端面に当接して、一対のワッシャー２６が配設されている。図４において、フランジ２２ａの一方側に位置するワッシャー２６は、割りピン２４に他方側から当接している。また、フランジ２２ａとフランジ２２ｂとの間には、筒状のスペーサー２９が軸体２１に外嵌されており、該スペーサー２９の両端面は、フランジ２２ａの他方側に位置するワッシャー２６とフランジ２２ｂの一方側に位置するワッシャー２６とに当接されている。 Further, a pair of washers 26 are disposed in contact with both end faces of the flange 22 in the axis O direction. In FIG. 4, the washer 26 located on one side of the flange 22a is in contact with the split pin 24 from the other side. A cylindrical spacer 29 is externally fitted to the shaft body 21 between the flange 22a and the flange 22b, and both end surfaces of the spacer 29 are located on the other side of the flange 22a and the flange 22b. It is contact | abutted with the washer 26 located in the one side.
　また、フランジ２２ｂとフランジ２２ｃとの間には、筒状のスペーサー３０が軸体２１に外嵌されており、該スペーサー３０の両端面は、フランジ２２ｂの他方側に位置するワッシャー２６とフランジ２２ｃの一方側に位置するワッシャー２６とに当接されている。
　スペーサー２９とスペーサー３０とは、互いに略同一の内径及び外径とされており、スペーサー２９の軸Ｏ方向の長さはスペーサー３０の軸Ｏ方向の長さよりも大きく設定されている。 A cylindrical spacer 30 is externally fitted to the shaft body 21 between the flange 22b and the flange 22c, and both end surfaces of the spacer 30 are located on the other side of the flange 22b and the flange 22c. It is contact | abutted with the washer 26 located in the one side.
The spacer 29 and the spacer 30 have substantially the same inner diameter and outer diameter, and the length of the spacer 29 in the axis O direction is set larger than the length of the spacer 30 in the axis O direction.
　図５において、フランジ２２ｃの他方側（図５における右側）には、スペーサー２９、３０と略同一の内径とされ、かつ、スペーサー２９、３０よりも大きな外径を有するドレンシール筒３１が軸体２１に外嵌されている。ドレンシール筒３１の一方側（図５における左側）の端面は、フランジ２２ｃの他方側に位置するワッシャー２６に当接されている。ドレンシール筒３１の一方側の端面における径方向内方の部分には、周方向に沿って延びる環状の溝３１ａが形成されており、この溝３１ａにはＯリング３２が配設されている。 5, a drain seal cylinder 31 having an inner diameter substantially the same as the spacers 29 and 30 and having an outer diameter larger than that of the spacers 29 and 30 is provided on the other side (right side in FIG. 5) of the flange 22c. 21 is externally fitted. An end face on one side (left side in FIG. 5) of the drain seal cylinder 31 is in contact with a washer 26 located on the other side of the flange 22c. An annular groove 31a extending in the circumferential direction is formed in the radially inner portion of the end surface on one side of the drain seal cylinder 31, and an O-ring 32 is disposed in the groove 31a.
　ドレンシール筒３１の他方側の端部は、軸体２１の他方側の端部よりも他方側に向けて僅かに突出している。ドレンシール筒３１の他方側の端面には、ロゼットワッシャー３３が他方側から当接しており、該ロゼットワッシャー３３には他方側から丸皿ネジ３４が挿入されている。丸皿ネジ３４は、軸体２１のネジ穴２１ｂに螺合している。また、ドレンシール筒３１の外周面には、周方向に沿って延びる環状の溝３１ｂが形成されており、この溝３１ｂにはＯリング３５が配設されている。 The other end portion of the drain seal cylinder 31 protrudes slightly toward the other side from the other end portion of the shaft body 21. A rosette washer 33 is in contact with the other end face of the drain seal cylinder 31 from the other side, and a round countersunk screw 34 is inserted into the rosette washer 33 from the other side. The round countersunk screw 34 is screwed into the screw hole 21 b of the shaft body 21. An annular groove 31b extending along the circumferential direction is formed on the outer peripheral surface of the drain seal cylinder 31, and an O-ring 35 is disposed in the groove 31b.
　そして、フランジ２２は、円板状をなし軸体２１の軸Ｏ方向の両側からシール部材２３を挟む一対のフランジ状部材２５を備えている。フランジ状部材２５は、例えば摺動性を有する樹脂材料からなり、本実施形態ではＰＯＭ（ポリアセタール）が用いられている。一対のフランジ状部材２５は、軸Ｏ方向を向く平滑な背面２５ａ同士を互いに当接させた状態で、背向配置されている。 The flange 22 has a disk-like shape and includes a pair of flange-like members 25 that sandwich the seal member 23 from both sides of the shaft body 21 in the axis O direction. The flange-shaped member 25 is made of, for example, a slidable resin material, and POM (polyacetal) is used in this embodiment. The pair of flange-like members 25 are arranged in the back direction in a state where the smooth back surfaces 25a facing the axis O direction are in contact with each other.
　図６（ｂ）に示すように、フランジ状部材２５の背面２５ａにおける径方向内方の端部には、周方向に沿って延びる環状をなし、その縦断面が径方向外方から内方に向かうに従い漸次軸Ｏ方向に背面２５ａから離間するように傾斜するテーパ部２５ｂが形成されている。そして、一対のフランジ状部材２５が背向配置されたときに、互いのテーパ部２５ｂ、２５ｂにより画成される領域が、前述の溝２７とされている。 As shown in FIG. 6 (b), the radially inner end of the rear surface 25a of the flange-shaped member 25 has an annular shape extending along the circumferential direction, and its longitudinal section extends from the radially outer side to the inner side. A taper portion 25b is formed so as to gradually move away from the back surface 25a in the direction of the axis O as it goes. Then, when the pair of flange-like members 25 are disposed in the back direction, the region defined by the taper portions 25b and 25b is the groove 27 described above.
　また、フランジ状部材２５の背面２５ａにおける径方向外方の端部には、該背面２５ａより軸Ｏ方向に窪むとともに周方向に沿って延びる環状の凹部２５ｃが形成されている。凹部２５ｃの径方向外方の端部には、その軸Ｏ方向の先端高さが背面２５ａよりも低く設定された環状突起２５ｄが形成されている。そして、一対のフランジ状部材２５が背向配置されたときに、互いの凹部２５ｃ、２５ｃ及び環状突起２５ｄ、２５ｄにより画成される領域が、前述のシール部材装着溝３６とされている。 Further, an annular recess 25c that is recessed in the axis O direction from the back surface 25a and extends along the circumferential direction is formed at the radially outer end of the back surface 25a of the flange-shaped member 25. An annular protrusion 25d whose tip height in the axis O direction is set lower than that of the back surface 25a is formed at the radially outer end of the recess 25c. When the pair of flange-like members 25 are disposed in the back direction, the region defined by the mutual concave portions 25c and 25c and the annular protrusions 25d and 25d is the above-described seal member mounting groove 36.
　図５、図６において、フランジ状部材２５には、軸Ｏ方向におけるシール部材２３及び背面２５ａとは反対側を向く面２５ｅから突出するとともに径方向に延びる第１リブ部３７が、周方向に間隔をあけて複数形成されている。フランジ状部材２５の面２５ｅにおける径方向内方の端部には、該面２５ｅから突出するとともに周方向に沿って延びる環状のボス部３８が形成されており、第１リブ部３７は、ボス部３８の外周面から径方向外方へ向けて延びるように形成されている。 5 and 6, the flange-like member 25 has a first rib portion 37 that protrudes from the surface 25e facing the side opposite to the seal member 23 and the back surface 25a in the axis O direction and extends in the radial direction. A plurality are formed at intervals. An annular boss portion 38 that protrudes from the surface 25e and extends in the circumferential direction is formed at the radially inner end portion of the surface 25e of the flange-shaped member 25. The first rib portion 37 is a boss portion. It is formed so as to extend radially outward from the outer peripheral surface of the portion 38.
　また、フランジ状部材２５には、面２５ｅから突出する第２リブ部３９が周方向に間隔をあけて複数形成されている。図示の例では、第２リブ部３９が、第１リブ部３７の径方向外方に連なるように一体に形成されている。第２リブ部３９の突出高さ（面２５ｅから軸Ｏ方向に突出する高さ）は、第１リブ部３７の突出高さよりも大きく設定されており、第２リブ部３９の外周縁部は、フランジ状部材２５の外周面に連なるように軸Ｏ方向に延びている。 In the flange-like member 25, a plurality of second rib portions 39 protruding from the surface 25e are formed at intervals in the circumferential direction. In the example shown in the figure, the second rib portion 39 is integrally formed so as to continue to the radially outer side of the first rib portion 37. The protruding height of the second rib portion 39 (the height protruding from the surface 25e in the axis O direction) is set to be larger than the protruding height of the first rib portion 37, and the outer peripheral edge portion of the second rib portion 39 is , And extends in the direction of the axis O so as to be continuous with the outer peripheral surface of the flange-shaped member 25.
　また、図７に示すように、シール部材２３は、環状をなしフランジ状部材２５に支持される本体部４０と、本体部４０の外周面４０ａから径方向外方へ向けて突出するとともに周方向に沿って延びる環状の突起部４１と、を備えている。シール部材２３は、例えばゴム等の弾性体からなり、本実施形態では、水素化ニトリルゴムが用いられている。本体部４０における軸Ｏ方向の幅寸法は、シール部材装着溝３６の前記幅寸法と略同一又は僅かに大きく設定されている。また、突起部４１における軸Ｏ方向の幅寸法は、フランジ２２において対向する環状突起２５ｄ、２５ｄ同士の間隔よりも若干小さく設定されている。 Further, as shown in FIG. 7, the seal member 23 has a ring-shaped main body portion 40 supported by the flange-like member 25, and protrudes radially outward from the outer peripheral surface 40 a of the main body portion 40 and in the circumferential direction. And an annular protrusion 41 extending along the line. The seal member 23 is made of, for example, an elastic body such as rubber. In the present embodiment, hydrogenated nitrile rubber is used. The width dimension of the main body 40 in the axis O direction is set to be substantially the same as or slightly larger than the width dimension of the seal member mounting groove 36. Further, the width dimension of the protrusion 41 in the axis O direction is set slightly smaller than the interval between the annular protrusions 25d and 25d facing each other in the flange 22.
　図７（ｃ）において、突起部４１における径方向外方の端部は、その縦断面が半円状をなす凸曲面とされている。図５に示すように、シール部材２３がフランジ２２のシール部材装着溝３６に装着された状態において、突起部４１の前記端部はフランジ２２の外周面から径方向外方へ向けて突出して配置されている。また、本体部４０の外周面４０ａは、フランジ状部材２５の環状突起２５ｄに径方向内方から当接している。 7C, the radially outer end of the protrusion 41 is a convex curved surface whose longitudinal section forms a semicircular shape. As shown in FIG. 5, in a state where the seal member 23 is mounted in the seal member mounting groove 36 of the flange 22, the end portion of the projection 41 protrudes from the outer peripheral surface of the flange 22 outward in the radial direction. Has been. The outer peripheral surface 40a of the main body 40 is in contact with the annular protrusion 25d of the flange-like member 25 from the radially inner side.
　以上説明したように、本実施形態に係るピストン構成体２０によれば、フランジ２２が、軸Ｏ方向の両側からシール部材２３を挟む一対のフランジ状部材２５を備えているので、製造時に、シール部材２３の略全体を視認できる状態で、該シール部材２３をフランジ２２の外周面のシール部材装着溝３６に装着できる。従って、フランジ２２に対して良品のシール部材２３を確実に組み込むことができ、信頼性が十分に高められる。 As described above, according to the piston structure 20 according to the present embodiment, the flange 22 includes the pair of flange-like members 25 that sandwich the seal member 23 from both sides in the axis O direction. The seal member 23 can be mounted in the seal member mounting groove 36 on the outer peripheral surface of the flange 22 in a state where substantially the entire member 23 is visible. Therefore, a good seal member 23 can be reliably incorporated into the flange 22 and the reliability is sufficiently enhanced.
　また、シール部材２３は、一対のフランジ状部材２５に挟まれることで簡便にフランジ２２に装着されることから、組立が容易である。
　さらに、使用に供されて劣化したシール部材２３を交換する必要が生じた際には、一対のフランジ状部材２５を軸Ｏ方向に互いに離間させることで該シール部材２３を他の新しいシール部材２３と交換可能である。これによれば、従来のように、シール部材が劣化した際にピストン構成体の全体を交換する必要がなく、メンテナンス費用が削減できる。 Further, since the seal member 23 is easily attached to the flange 22 by being sandwiched between the pair of flange-like members 25, the assembly is easy.
Further, when it becomes necessary to replace the deteriorated seal member 23 after being used, the pair of flange-like members 25 are separated from each other in the direction of the axis O, so that the seal member 23 is replaced with another new seal member 23. And can be exchanged. According to this, unlike the conventional case, when the seal member is deteriorated, it is not necessary to replace the entire piston structure, and the maintenance cost can be reduced.
　また、フランジ状部材２５には、面２５ｅから突出するとともに径方向に延びる第１リブ部３７が周方向に間隔をあけて複数形成されているので、フランジ２２の剛性が確保される。 Further, since the flange-like member 25 is formed with a plurality of first rib portions 37 protruding from the surface 25e and extending in the radial direction at intervals in the circumferential direction, the rigidity of the flange 22 is ensured.
　また、フランジ状部材２５には、面２５ｅから突出する第２リブ部３９が周方向に間隔をあけて複数形成されているとともに、第２リブ部３９の外周縁部が、該フランジ状部材２５の外周面に連なるように軸Ｏ方向に延びているので、前記外周縁部がシリンダー１７ａの内周面に摺動して、ピストン構成体２０をバルブボディー１７に対して軸Ｏ方向に精度よく案内することとなる。これにより、シリンダー１７ａに対するピストン構成体２０の軸ズレが防止されて、軸Ｏ方向の移動が高精度に安定して行われる。尚、フランジ状部材２５は摺動性を有する樹脂材料からなるので、前記外周縁部がシリンダー１７ａの内周面を傷付けるようなことが防止されている。 The flange-like member 25 has a plurality of second rib portions 39 protruding from the surface 25e at intervals in the circumferential direction, and the outer peripheral edge portion of the second rib portion 39 is the flange-like member 25. Since the outer peripheral edge slides on the inner peripheral surface of the cylinder 17a, the piston component 20 is accurately moved in the axis O direction with respect to the valve body 17. I will guide you. Thereby, the axial displacement of the piston structure 20 with respect to the cylinder 17a is prevented, and the movement in the direction of the axis O is stably performed with high accuracy. Since the flange-like member 25 is made of a resin material having slidability, the outer peripheral edge portion is prevented from damaging the inner peripheral surface of the cylinder 17a.
　また、シール部材２３における本体部４０の外周面４０ａが環状突起２５ｄに径方向内方から当接しているので、該シール部材２３が、シリンダー１７ａ内を流れる対象流体の力によってシール部材装着溝３６内から引き出されるようなことが防止される。 Further, since the outer peripheral surface 40a of the main body portion 40 of the seal member 23 is in contact with the annular protrusion 25d from the inside in the radial direction, the seal member 23 is sealed by the force of the target fluid flowing in the cylinder 17a. Pulling out from the inside is prevented.
　そして、このようなピストン構成体２０を用いたコントロールバルブ６によれば、対象流体の流通方向制御が安定して精度よく確実に行える。 And according to the control valve 6 using such a piston structure 20, the flow direction control of the target fluid can be stably and accurately performed.
（第２実施形態）
　次に、本発明の第２実施形態に係るピストン構成体について、図８～図１０を参照して説明する。尚、前述の実施形態と同一部材には同一の符号を付し、その説明を省略する。 (Second Embodiment)
Next, a piston structure according to a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same member as above-mentioned embodiment, and the description is abbreviate | omitted.
　本実施形態のピストン構成体５０では、フランジ５２及びシール部材５３の構成が、前述のフランジ２２及びシール部材２３とは異なっている。
　図８、図９に示すように、ピストン構成体５０のフランジ５２は、円板状をなし軸体２１の軸Ｏ方向の両側からシール部材５３を挟む一対のフランジ状部材５５を備えている。一対のフランジ状部材５５は、軸Ｏ方向を向く背面５５ａ同士を互いに対向させた状態で、背向配置されている。 In the piston structure 50 of the present embodiment, the structures of the flange 52 and the seal member 53 are different from those of the flange 22 and the seal member 23 described above.
As shown in FIGS. 8 and 9, the flange 52 of the piston structure 50 has a disk shape and includes a pair of flange-like members 55 that sandwich the seal member 53 from both sides of the shaft body 21 in the axis O direction. The pair of flange-like members 55 are arranged in the back direction with the back surfaces 55a facing the axis O direction facing each other.
　図９（ａ）（ｂ）において、フランジ状部材５５の内周面のうち、軸Ｏ方向の背面５５ａ側の端部は、この端部よりも軸Ｏ方向の背面５５ａとは反対側の他の部分よりも拡径されて溝部５５ｂとされている。そして、一対のフランジ状部材５５が背向配置されたときに、互いの溝部５５ｂ、５５ｂにより画成される領域が溝（不図示）とされ、この溝にはＯリング２８が配設される（図８参照）。 9A and 9B, of the inner peripheral surface of the flange-shaped member 55, the end on the back surface 55a side in the axis O direction is the other side opposite to the back surface 55a in the axis O direction than this end portion. The diameter of the groove portion 55b is larger than that of the groove portion 55b. When the pair of flange-like members 55 are disposed in the back direction, a region defined by the mutual groove portions 55b and 55b is a groove (not shown), and an O-ring 28 is disposed in the groove. (See FIG. 8).
　フランジ状部材５５には、背面５５ａから突出するとともに径方向に延びる第３リブ部５７が、周方向に間隔をあけて複数形成されている。第３リブ部５７の径方向内方の端部は、背面５５ａから突出して形成されるとともに軸Ｏ回りに環状をなすボス部５８の外周縁部に連結されている。また、第３リブ部５７の径方向外方の端部は、背面５５ａから突出して形成されるとともに軸Ｏ回りに環状をなす平滑部５９の内周縁部に連結されている。第３リブ部５７、ボス部５８及び平滑部５９の背面５５ａからの軸Ｏ方向の突出高さは、互いに同一とされている。そして、一対のフランジ状部材５５は、互いの第３リブ部５７同士、ボス部５８同士、及び、平滑部５９同士を当接させた状態で、背向配置される。 The flange-like member 55 is formed with a plurality of third rib portions 57 that protrude from the back surface 55a and extend in the radial direction at intervals in the circumferential direction. The radially inner end portion of the third rib portion 57 is formed to protrude from the back surface 55a and is connected to the outer peripheral edge portion of the boss portion 58 having an annular shape around the axis O. Further, the radially outer end portion of the third rib portion 57 is formed to protrude from the back surface 55a and is connected to the inner peripheral edge portion of the smooth portion 59 having an annular shape around the axis O. Projection heights in the axis O direction from the back surface 55a of the third rib portion 57, the boss portion 58, and the smooth portion 59 are the same. Then, the pair of flange-like members 55 are arranged in the back direction with the third rib portions 57, the boss portions 58, and the smooth portions 59 in contact with each other.
　また、フランジ状部材５５の背面５５ａにおける径方向外方の端部には、平滑部５９より軸Ｏ方向に窪むとともに周方向に沿って延びる環状の凹部５５ｃが形成されている。凹部５５ｃの径方向外方の端部には、その軸Ｏ方向の先端高さが平滑部５９よりも低く設定された環状突起５５ｄが形成されている。そして、一対のフランジ状部材５５が背向配置されたときに、互いの凹部５５ｃ、５５ｃ及び環状突起５５ｄ、５５ｄにより画成される領域が、シール部材装着溝３６とされている。 Further, an annular recess 55c that is recessed in the axis O direction from the smoothing portion 59 and extends in the circumferential direction is formed at the radially outer end of the back surface 55a of the flange-shaped member 55. An annular protrusion 55d whose tip height in the axis O direction is set lower than that of the smooth portion 59 is formed at the radially outer end of the recess 55c. When the pair of flange-like members 55 are arranged in the back direction, a region defined by the concave portions 55c and 55c and the annular protrusions 55d and 55d is the seal member mounting groove 36.
　また、図９（ｂ）（ｃ）に示すように、フランジ状部材５５において、軸Ｏ方向におけるシール部材５３及び背面５５ａとは反対側を向く面５５ｅは、径方向外方の端部が面取り加工されている以外は、略平滑な面とされている。 Further, as shown in FIGS. 9B and 9C, in the flange-like member 55, the surface 55e facing the side opposite to the seal member 53 and the back surface 55a in the axis O direction is chamfered at the radially outer end. Except for being processed, the surface is substantially smooth.
　また、図１０（ａ）（ｂ）に示すように、シール部材５３は、環状をなしフランジ状部材５５に支持される本体部６０と、本体部６０の外周面６３ａから径方向外方へ向けて突出するとともに周方向に沿って延びる環状の突起部６１と、を備えている。本体部６０において径方向内方に位置する部分は、フランジ状部材５５に支持される内側部分６２とされている。また、本体部６０において径方向外方に位置する部分は、内側部分６２よりも軸Ｏ方向の幅寸法が小さく形成された外側部分６３とされている。 Further, as shown in FIGS. 10A and 10B, the seal member 53 has an annular main body 60 supported by the flange-like member 55 and an outer circumferential surface 63 a of the main body 60 directed radially outward. And an annular protrusion 61 that extends along the circumferential direction. A portion located radially inward in the main body 60 is an inner portion 62 supported by the flange-like member 55. In addition, a portion located radially outward in the main body portion 60 is an outer portion 63 formed with a width dimension in the axis O direction smaller than that of the inner portion 62.
　本体部６０の内側部分６２における軸Ｏ方向の幅寸法は、シール部材装着溝３６の前記幅寸法と略同一又は僅かに大きく設定されている。また、本体部６０の外側部分６３における軸Ｏ方向の幅寸法は、フランジ５２において対向する環状突起５５ｄ、５５ｄ同士の間隔よりも若干小さく設定されている。
　内側部分６２の外周面６２ａは、フランジ状部材５５の環状突起５５ｄに径方向内方から当接している。 The width dimension in the axis O direction of the inner portion 62 of the main body 60 is set to be substantially the same as or slightly larger than the width dimension of the seal member mounting groove 36. In addition, the width dimension in the axis O direction of the outer portion 63 of the main body 60 is set slightly smaller than the interval between the annular protrusions 55 d and 55 d facing each other in the flange 52.
The outer peripheral surface 62 a of the inner portion 62 is in contact with the annular protrusion 55 d of the flange-like member 55 from the radially inner side.
　図１０（ｃ）に示すように、突起部６１は、外側部分６３の外周面６３ａから突出して形成されている。突起部６１は、本体部６０側に位置する基端部分から径方向外方に位置する先端部分へ向かうに従い漸次軸Ｏ方向の幅が狭くなるように形成されている。また、突起部６１は、本体部６０の外周面６３ａに軸Ｏ方向に離間して複数形成されている。図示の例では、突起部６１が外周面６３ａにおける軸Ｏ方向の両端に一対形成されており、該突起部６１の軸Ｏ方向を向く両側面は、テーパ状とされている。 As shown in FIG. 10 (c), the protrusion 61 is formed so as to protrude from the outer peripheral surface 63 a of the outer portion 63. The protrusion 61 is formed such that the width in the direction of the axis O gradually decreases from the proximal end portion located on the main body portion 60 side toward the distal end portion located radially outward. A plurality of protrusions 61 are formed on the outer peripheral surface 63 a of the main body 60 so as to be spaced apart in the axis O direction. In the illustrated example, a pair of protrusions 61 are formed on both ends of the outer peripheral surface 63a in the direction of the axis O, and both side surfaces of the protrusion 61 facing the direction of the axis O are tapered.
　また、図１０（ｄ）は、突起部６１の変形例を示している。この突起部６１は、その前記先端部分における径方向の単位長さあたりの軸Ｏ方向の変位量が、前記基端部分における前記変位量よりも小さく設定されており、該突起部６１の軸Ｏ方向を向く両側面は、凹曲面状とされている。
　突起部６１における径方向外方の端部は、フランジ５２の外周面から径方向外方へ向けて突出して配置されている。 FIG. 10D shows a modified example of the protrusion 61. The protrusion 61 has a displacement amount in the direction of the axis O per unit length in the radial direction at the distal end portion set to be smaller than the displacement amount at the proximal end portion. Both side surfaces facing the direction are concavely curved.
The radially outer end of the protrusion 61 is disposed so as to protrude radially outward from the outer peripheral surface of the flange 52.
　本実施形態に係るピストン構成体５０によれば、前述のピストン構成体２０と同様の効果が得られるとともに、下記の効果を奏する。すなわち、フランジ状部材５５に第３リブ部５７が形成されているので、該フランジ状部材５５の剛性が確保されつつ、シリンダー１７ａ内に露出する面５５ｅが略平滑な面とされているので、フランジ状部材５５が対象流体の抵抗になりにくい。 According to the piston structure 50 according to the present embodiment, the same effects as those of the piston structure 20 described above can be obtained, and the following effects can be achieved. That is, since the third rib portion 57 is formed on the flange-shaped member 55, the surface 55e exposed in the cylinder 17a is a substantially smooth surface while ensuring the rigidity of the flange-shaped member 55. The flange-like member 55 is unlikely to become a resistance of the target fluid.
　また、シール部材５３の突起部６１が、その前記基端部分から前記先端部分へ向かうに従い漸次軸Ｏ方向の幅が狭くなるように形成されているので、該突起部６１の剛性を確保しつつ、シリンダー１７ａの内周面との摺動抵抗を低減できる。従って、ピストン構成体５０がシリンダー１７ａ内を滑らかに移動することになり、シール部材５３の劣化や破損が抑制されて、対象流体のシール性が安定して確保される。
　尚、図１０（ｄ）で説明したように、突起部６１の前記先端部分における径方向の単位長さあたりの軸Ｏ方向の変位量が、前記基端部分における前記変位量よりも小さく設定された場合、前述の摺動抵抗がより低減されることから望ましい。 Further, since the protrusion 61 of the seal member 53 is formed so that the width in the direction of the axis O gradually decreases from the base end portion toward the tip end portion, the rigidity of the protrusion 61 is secured. The sliding resistance with the inner peripheral surface of the cylinder 17a can be reduced. Accordingly, the piston component 50 moves smoothly in the cylinder 17a, and the deterioration and breakage of the seal member 53 are suppressed, and the sealing performance of the target fluid is stably secured.
As described in FIG. 10D, the displacement amount in the axis O direction per unit length in the radial direction at the distal end portion of the protrusion 61 is set smaller than the displacement amount at the proximal end portion. In this case, the above-mentioned sliding resistance is further reduced, which is desirable.
　また、突起部６１が、本体部６０の外周面６３ａに軸Ｏ方向に離間して複数形成されているので、対象流体のシール性がより向上する。 In addition, since a plurality of the protrusions 61 are formed on the outer peripheral surface 63a of the main body 60 so as to be separated from each other in the axis O direction, the sealing performance of the target fluid is further improved.
　尚、本発明は前述の実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることができる。
　例えば、前述の実施形態では、軟水器１は、コントロールバルブ６を作動して５工程からなるサイクルを自動再生動作により行い、ピストン構成体２０、５０には、軸体２１の軸Ｏ方向に互いに離間して３つのフランジ２２、５２が配設されているとしたが、これに限定されるものではない。すなわち、軟水器１の工程数は種々の目的に応じて適宜設定されるものであり、ピストン構成体２０、５０のフランジ２２、５２の数はこの工程数に対応して適宜決定されてよい。 In addition, this invention is not limited to the above-mentioned embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, in the above-described embodiment, the water softener 1 operates the control valve 6 to perform a cycle consisting of five steps by the automatic regeneration operation, and the piston components 20 and 50 are mutually connected in the direction of the axis O of the shaft body 21. Although the three flanges 22 and 52 are spaced apart from each other, the present invention is not limited to this. That is, the number of steps of the water softener 1 is appropriately set according to various purposes, and the number of the flanges 22 and 52 of the piston components 20 and 50 may be appropriately determined according to the number of steps.
　また、第１実施形態では、フランジ状部材２５において、第２リブ部３９が、第１リブ部３７の径方向外方に連なるように一体に形成されていることとしたが、これに限定されるものではなく、これらが互いに別体に形成されていてもよい。 Further, in the first embodiment, in the flange-like member 25, the second rib portion 39 is integrally formed so as to be continuous with the radially outer side of the first rib portion 37. However, the present invention is not limited to this. However, they may be formed separately from each other.
　また、第１実施形態のフランジ２２に対して、シール部材２３の代わりに第２実施形態のシール部材５３を組み合わせてもよい。
　その他、本発明の趣旨を逸脱しない範囲で、第１、第２実施形態の各構成要素を適宜組み合わせたり、周知の構成要素に置き換えたりしてもよい。 Moreover, you may combine the sealing member 53 of 2nd Embodiment instead of the sealing member 23 with respect to the flange 22 of 1st Embodiment.
In addition, the constituent elements of the first and second embodiments may be appropriately combined or replaced with known constituent elements without departing from the gist of the present invention.
　また、ピストン構成体２０、５０及びこれを用いたコントロールバルブ６は、前述した軟水器１以外の用途にも適用可能である。この場合、対象流体として、前述した水及び塩水以外の、油、溶剤、酸又はアルカリ溶液、その他の溶液等を用いることができる。尚、ピストン構成体２０、５０の各構成要素（軸体２１、フランジ２２、５２、シール部材２３、５３等）の材質は、対象流体に応じて適宜周知の材質に置換可能である。
　また、ピストン構成体２０、５０を、コントロールバルブ６以外の用途に用いてもよい。 Moreover, the piston structural bodies 20 and 50 and the control valve 6 using the same are applicable to uses other than the water softener 1 described above. In this case, oils, solvents, acid or alkali solutions, other solutions, etc. other than the water and salt water described above can be used as the target fluid. In addition, the material of each component (shaft body 21, flanges 22, 52, seal members 23, 53, etc.) of the piston components 20 and 50 can be appropriately replaced with a well-known material according to the target fluid.
Moreover, you may use piston structure 20 and 50 for uses other than the control valve 6. FIG.
　本発明は、その精神又は主要な特徴から逸脱することなく、他のいろいろな形で実施することができる。そのため、上記の実施形態若しくは実施例は、あらゆる点で単なる例示に過ぎず、限定的に解釈してはならない。本発明の範囲は、請求の範囲によって示すものであって、明細書本文には何ら拘束されない。更に、請求の範囲の均等範囲に属する変形や変更は、全て本発明の範囲内のものである。 The present invention can be implemented in various other forms without departing from the spirit or main features thereof. Therefore, the above-described embodiments or examples are merely examples in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the scope of claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.
　６　コントロールバルブ
　９　原水入口（流入口）
　１０　軟水出口（流出口）
　１１　塩水入口（流入口）
　１７　バルブボディー
　１９　ドレン出口（流出口）
　２０、５０　ピストン構成体
　２１　軸体
　２２、５２　フランジ
　２３、５３　シール部材
　２５、５５　フランジ状部材
　２５ｅ　面
　３７　第１リブ部
　３９　第２リブ部
　４０、６０　本体部
　４０ａ、６３ａ　本体部の外周面
　４１、６１　突起部
　Ｏ　軸 6 Control valve 9 Raw water inlet (inlet)
10 Soft water outlet (outlet)
11 Saltwater inlet (inlet)
17 Valve body 19 Drain outlet (outlet)
20, 50 Piston component 21 Shaft body 22, 52 Flange 23, 53 Seal member 25, 55 Flange-like member 25e Surface 37 First rib portion 39 Second rib portion 40, 60 Main body portion 40a, 63a Outer peripheral surface 41 of main body portion 61 Projection O-axis

Claims (6)

  1. 　軸体と、
    　円板状をなし、前記軸体に貫通される少なくとも１つのフランジと、
    　前記フランジの外周面から径方向外方へ向けて突設されるとともに周方向に沿って延びる環状のシール部材と、を備えたピストン構成体であって、
    　前記フランジは、前記軸体の軸方向の両側から前記シール部材を挟む一対のフランジ状部材を備えることを特徴とするピストン構成体。     A shaft,
    At least one flange having a disc shape and penetrating through the shaft;
    An annular seal member that protrudes radially outward from the outer peripheral surface of the flange and extends along the circumferential direction,
    The said flange is provided with a pair of flange-shaped member which pinches | interposes the said sealing member from the both sides of the axial direction of the said shaft body, The piston structure characterized by the above-mentioned.
  2. 　請求項１に記載のピストン構成体であって、
    　前記シール部材は、
    　環状をなし、前記フランジ状部材に支持される本体部と、
    　前記本体部の外周面から径方向外方へ向けて突出するとともに周方向に沿って延びる環状の突起部と、を備え、
    　前記突起部は、前記本体部側に位置する基端部分から径方向外方に位置する先端部分へ向かうに従い漸次前記軸方向の幅が狭くなるように形成されているとともに、前記先端部分における径方向の単位長さあたりの前記軸方向の変位量が、前記基端部分における前記変位量よりも小さく設定されることを特徴とするピストン構成体。     The piston structure according to claim 1,
    The sealing member is
    An annular body, and a main body supported by the flange-shaped member;
    An annular protrusion that protrudes radially outward from the outer peripheral surface of the main body and extends along the circumferential direction,
    The protrusion is formed such that the axial width gradually decreases from the proximal end portion located on the main body portion side toward the distal end portion located radially outward, and the diameter at the distal end portion is reduced. A piston structure, wherein a displacement amount in the axial direction per unit length in a direction is set smaller than the displacement amount in the base end portion.
  3. 　請求項１又は２に記載のピストン構成体であって、
    　前記シール部材は、
    　環状をなし、前記フランジ状部材に支持される本体部と、
    　前記本体部の外周面から径方向外方へ向けて突出するとともに周方向に沿って延びる環状の突起部と、を備え、
    　前記突起部は、前記本体部の外周面に前記軸方向に離間して複数形成されていることを特徴とするピストン構成体。     The piston structure according to claim 1 or 2,
    The sealing member is
    An annular body, and a main body supported by the flange-shaped member;
    An annular protrusion that protrudes radially outward from the outer peripheral surface of the main body and extends along the circumferential direction,
    A plurality of the projecting portions are formed on the outer peripheral surface of the main body portion so as to be spaced apart from each other in the axial direction.
  4. 　請求項１～３のいずれか一項に記載のピストン構成体であって、
    　前記フランジ状部材には、前記軸方向における前記シール部材とは反対側を向く面から突出するとともに径方向に延びる第１リブ部が周方向に間隔をあけて複数形成されていることを特徴とするピストン構成体。     The piston structure according to any one of claims 1 to 3,
    The flange-like member is formed with a plurality of first rib portions protruding from a surface facing the side opposite to the seal member in the axial direction and extending in the radial direction at intervals in the circumferential direction. Piston component.
  5. 　請求項１～４のいずれか一項に記載のピストン構成体であって、
    　前記フランジ状部材には、前記軸方向における前記シール部材とは反対側を向く面から突出する第２リブ部が周方向に間隔をあけて複数形成され、
    　前記第２リブ部の外周縁部は、前記フランジ状部材の外周面に連なるように前記軸方向に延びていることを特徴とするピストン構成体。     The piston structure according to any one of claims 1 to 4,
    In the flange-shaped member, a plurality of second rib portions protruding from a surface facing the side opposite to the seal member in the axial direction are formed at intervals in the circumferential direction,
    The outer peripheral edge part of the said 2nd rib part is extended in the said axial direction so that it may continue with the outer peripheral surface of the said flange-shaped member, The piston structure characterized by the above-mentioned.
  6. 　対象流体の流通方向制御に対応する流入口及び流出口が形成されたバルブボディーと、
    　請求項１～５のいずれか一項に記載のピストン構成体と、を備えたことを特徴とするコントロールバルブ。     A valve body in which an inlet and an outlet corresponding to flow direction control of the target fluid are formed;
    A control valve comprising the piston structure according to any one of claims 1 to 5.
PCT/JP2010/004680 2010-07-21 2010-07-21 Piston structure and control valve WO2012011150A1 (en)

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JP2011511935A JP4803332B1 (en) 2010-07-21 2010-07-21 Piston component and control valve

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Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104455512A (en) * 2014-11-25 2015-03-25 苏州福润机械有限公司 Water valve in water softener

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5620862A (en) * 1979-07-10 1981-02-26 Freudenberg Carl Piston
JPH0288071U (en) * 1988-12-27 1990-07-12
JPH0288070U (en) * 1988-12-27 1990-07-12

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0288071A (en) * 1988-09-26 1990-03-28 Terumo Corp Bonding reinforcing agent for fluororesin and medical apparatus using the same agent

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5620862A (en) * 1979-07-10 1981-02-26 Freudenberg Carl Piston
JPH0288071U (en) * 1988-12-27 1990-07-12
JPH0288070U (en) * 1988-12-27 1990-07-12

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104455512A (en) * 2014-11-25 2015-03-25 苏州福润机械有限公司 Water valve in water softener

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JPWO2012011150A1 (en) 2013-09-09

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