WO2020026569A1 - Dispositif de soupape - Google Patents

Dispositif de soupape Download PDF

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Publication number
WO2020026569A1
WO2020026569A1 PCT/JP2019/020797 JP2019020797W WO2020026569A1 WO 2020026569 A1 WO2020026569 A1 WO 2020026569A1 JP 2019020797 W JP2019020797 W JP 2019020797W WO 2020026569 A1 WO2020026569 A1 WO 2020026569A1
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WO
WIPO (PCT)
Prior art keywords
valve
plunger
solenoid
drain
valve seat
Prior art date
Application number
PCT/JP2019/020797
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English (en)
Japanese (ja)
Inventor
浅田哲夫
Original Assignee
株式会社テイエルブイ
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 株式会社テイエルブイ filed Critical 株式会社テイエルブイ
Priority to JP2019568411A priority Critical patent/JPWO2020026569A1/ja
Publication of WO2020026569A1 publication Critical patent/WO2020026569A1/fr

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    • 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
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
    • 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
    • F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
    • F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
    • F16T1/20—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats
    • F16T1/22—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats of closed-hollow-body type

Definitions

  • This application relates to a valve device.
  • a steam trap including a cleaning mechanism for removing foreign matter clogged in a drain (condensate) outlet.
  • the cleaning mechanism includes a displacement member (bimetal) that is displaced by a change in temperature, and a rod-shaped operation member that advances and retreats to a discharge port by displacement of the displacement member.
  • the displacement member is provided in a discharge passage through which the drain discharged from the discharge port flows. In this cleaning mechanism, when the drain is discharged, the displacement member is heated by the drain, and the operation member is retracted.
  • the displacement member expands (displaces) due to a decrease in temperature, and the operation member advances and enters the discharge port due to the extension of the displacement member. As the operation member enters, the foreign matter clogged in the discharge port is removed. In this way, the cleaning mechanism can automatically clean the discharge port without human operation.
  • the technique disclosed in the present application has been made in view of such circumstances, and a purpose thereof is to provide a valve device having a cleaning member that enters a discharge port and removes foreign matter from the discharge port. To increase the forward input (forward force) of the vehicle.
  • the valve device of the present application includes a casing, a valve body, a cleaning member, and a solenoid.
  • the casing has a fluid flow path provided with a discharge port in the middle.
  • the valve body opens and closes the discharge port.
  • the cleaning member enters the outlet and removes foreign matter from the outlet.
  • the solenoid has a plunger for displacing the cleaning member into the discharge port.
  • the advance input (forward force) to the discharge port of the cleaning member can be increased.
  • FIG. 1 is a sectional view illustrating a schematic configuration of a drain trap according to the embodiment.
  • FIG. 2 is an enlarged cross-sectional view illustrating a first valve mechanism and a cleaning mechanism according to the embodiment.
  • FIG. 3 is a cross-sectional view illustrating the operation of the cleaning mechanism according to the embodiment.
  • FIG. 4 is an enlarged cross-sectional view illustrating the second valve mechanism and the pushing mechanism according to the embodiment.
  • FIG. 5 is a front view illustrating the temperature responsive unit according to the embodiment.
  • FIG. 6 is a cross-sectional view illustrating the operation of the push mechanism according to the embodiment.
  • the drain trap 1 of the present embodiment causes the drain to flow out when the drain flows in, and prevents the outflow of the vapor when the steam flows in.
  • the drain trap 1 is an example of a valve device, and the drain is an example of a fluid.
  • the drain trap 1 includes a casing 10 in which a fluid passage is formed, and two valve mechanisms 30 and 40 provided in the passage and opening and closing the passage.
  • the drain trap 1 includes a cleaning mechanism 60 and a pushing mechanism 80.
  • the drain that has flowed into the casing 10 basically flows out of the casing 10 via the first valve mechanism 30.
  • the second valve mechanism 40 basically discharges the air flowing into the casing 10. However, the second valve mechanism 40 may discharge the drain flowing into the casing 10 in some cases.
  • the casing 10 has a main body 11 and a lid 12 attached to the main body 11.
  • the casing 10 has an inlet 21 through which the fluid flows into the casing 10, a storage chamber 22 that stores the fluid, and an outlet 23 through which the fluid flows out of the casing 10.
  • the casing 10 has a first discharge passage 24 that connects the storage chamber 22 and the outlet 23, and a second discharge passage 25 that connects the storage chamber 22 and the first discharge passage 24.
  • a flow path is formed by the inflow port 21, the storage chamber 22, the outflow port 23, the first discharge path 24, and the second discharge path 25.
  • the flow path has a first flow path for discharging drain and a second flow path for discharging air and drain.
  • the first flow path is formed by the inlet 21, the storage chamber 22, the first discharge passage 24, and the outlet 23.
  • the second flow path is formed by the inlet 21, the storage chamber 22, the second discharge passage 25, the first discharge passage 24, and the outlet 23.
  • the storage chamber 22 is formed by the main body 11 and the lid 12, and stores the drain.
  • the inflow port 21 is formed in the main body 11 and communicates with the upper part of the storage chamber 22.
  • the outlet 23 is formed in the main body 11.
  • the inflow port 21 and the outflow port 23 are formed on the same axis extending horizontally.
  • the first discharge passage 24 is formed in the main body 11, and has an upstream end communicating with a lower portion of the storage chamber 22.
  • the downstream end of the first discharge passage 24 communicates with the outlet 23.
  • the second discharge passage 25 is formed over the main body 11 and the lid 12, and has an upstream end communicating with an upper portion of the storage chamber 22 and a downstream end communicating with the first discharge passage 24.
  • the storage chamber 22 and the first discharge passage 24 are partitioned by the partition 13 extending substantially vertically.
  • the first valve mechanism 30 is a float type valve mechanism that discharges only the drain of the fluid flowing into the storage chamber 22. As shown in FIG. 2, the first valve mechanism 30 has a first valve body 31 and a first valve seat 32.
  • the first valve element 31 is a hollow spherical float, and is housed in the storage chamber 22 in a free state.
  • the first valve seat 32 is provided at an upstream end of the first discharge passage 24.
  • the first valve seat 32 is formed in a substantially cylindrical shape through which the valve hole 33 penetrates.
  • the first valve seat 32 is attached to the partition 13 by screwing.
  • the upstream end 33a of the valve hole 33 is located in the storage chamber 22 and forms an orifice.
  • the storage chamber 22 and the first discharge passage 24 communicate with each other via a valve hole 33.
  • the upstream end 33a of the valve hole 33 corresponds to a discharge port according to the present invention.
  • the first valve body 31 rises and separates from the first valve seat 32.
  • the first valve body 31 descends and sits on the first valve seat 32.
  • the first discharge passage 24, and thus the first flow passage is opened and closed. That is, the first valve element 31 rises and falls according to the drain storage level (drain water level) in the storage chamber 22 to open and close the valve hole 33 (the upstream end 33 a) of the first valve seat 32.
  • the storage chamber 22 is provided with a screen 26 at a portion communicating with the inflow port 21. The screen 26 prevents foreign matter (relatively large foreign matter) from flowing into the storage chamber 22 from the inlet 21.
  • the cleaning mechanism 60 removes foreign matter clogged in the valve hole 33 of the first valve seat 32 (in particular, the upstream end 33a of the valve hole 33).
  • the cleaning mechanism 60 is provided outside the storage chamber 22 in the main body 11, as shown in FIG.
  • the cleaning mechanism 60 is located downstream of the first valve seat 32.
  • “forward” means a direction approaching the first valve seat 32 in the direction of the central axis X1
  • “rearward” means a direction moving away from the first valve seat 32 in the direction of the central axis X1.
  • the center axis X1 is a center axis of the first valve seat 32 (the valve hole 33).
  • the cleaning mechanism 60 includes a solenoid 63, a cleaning member 70, and a pushing member 76.
  • the solenoid 63 is housed in a housing 61 formed behind (downstream) the first valve seat 32 in the main body 11.
  • the housing portion 61 is formed in a cylindrical shape coaxial with the central axis X1 (that is, coaxial with the first valve seat 32), and is closed by screwing the closing member 62.
  • the closing member 62 constitutes a cap.
  • the solenoid 63 has a solenoid main body 64, a plunger 65, and a coil spring 66, and is an electromagnetic actuator constituting a driving unit of the cleaning member 70.
  • the solenoid body 64 is formed in a substantially cylindrical shape, and is provided coaxially with the center axis X1.
  • the solenoid body 64 has a coil (not shown) built therein.
  • the plunger 65 is also referred to as a movable iron core, and is a shaft member provided to penetrate the solenoid body 64.
  • the plunger 65 extends in the direction of the central axis X1 and is provided coaxially with the solenoid main body 64.
  • the plunger 65 is provided with a front end side 65a protruding forward from the solenoid main body 64 and a rear end side 65b protruding rearward from the solenoid main body 64.
  • the plunger 65 has a flange portion 65c that is located halfway in the axial direction and has a larger diameter than other portions.
  • the flange 65c is provided on a rear end side 65b protruding rearward from the solenoid body 64.
  • the plunger 65 is provided in the solenoid main body 64 so as to be able to move (movable) in the direction of the center axis X1.
  • the coil spring 66 is provided between a rear end of the solenoid body 64 and a flange 65c of the plunger 65.
  • the coil spring 66 is an urging member for urging the flange 65c (plunger 65) backward.
  • the accommodation portion 61 is formed with a large diameter portion 61a and a small diameter portion 61b in order from the rear side (outside of the casing 10).
  • the large diameter portion 61a is provided with a mounting member 73 for the solenoid 63.
  • the attachment member 73 is formed in a disk shape, and is provided coaxially with the large-diameter portion 61a (the housing portion 61).
  • the mounting member 73 has a front surface (the left surface in FIG. 2) provided in contact with a step 61c between the large-diameter portion 61a and the small-diameter portion 61b, and covers the opening of the small-diameter portion 61b.
  • the mounting member 73 is fixed by a pressing member 74.
  • the pressing member 74 is formed in a cylindrical shape, and is provided coaxially with the large diameter portion 61a (the housing portion 61).
  • the pressing member 74 is screwed to the inner peripheral surface of the large diameter portion 61a and attached to the large diameter portion 61a.
  • the pressing member 74 has an outer diameter substantially equal to the outer diameter of the mounting member 73, and fixes the mounting member 73 by pressing the mounting member 73 against the step 61c.
  • the solenoid body 64 is housed inside the holding member 74.
  • the solenoid 63 is mounted by fixing the solenoid body 64 to a rear surface (a right surface in FIG. 2) of the mounting member 73.
  • the solenoid body 64 is fixed to the mounting member 73 by a fixing screw 75 inserted from the small diameter portion 61b side.
  • the solenoid 63 has an electric wire 67 for energizing the coil.
  • the electric wire 67 extends from the front end of the solenoid main body 64 to the outside of the closing member 62 through the inside of the holding member 74.
  • a through hole 73a coaxial with the center axis X1 is formed in the center of the mounting member 73.
  • the front end side 65a of the plunger 65 protruding forward from the solenoid body 64 is inserted into the through hole 73a.
  • the front end side 65 a of the plunger 65 protrudes forward from the mounting member 73. Seals are provided between the front surface of the mounting member 73 and the step 61c, and between the through hole 73a of the mounting member 73 and the front end 65a of the plunger 65, respectively.
  • the space between the front surface of the mounting member 73 and the step 61c is sealed by a Teflon packing 73b.
  • a space between the through hole 73a of the mounting member 73 and the front end side 65a of the plunger 65 is sealed by two O-rings 73c. Therefore, it is possible to prevent the drain discharged from the first valve seat 32 from entering the large-diameter portion 61a where the solenoid main body 64 is located.
  • the cleaning member 70 is connected to the plunger 65 of the solenoid 63, and is driven by the plunger 65 moving back and forth.
  • the cleaning member 70 is formed in a rod shape with a circular cross section, and is provided coaxially with the central axis X1. That is, the cleaning member 70 is a bar member extending in the direction of the central axis X1.
  • the cleaning member 70 includes a base 71 and an operation unit 72 continuously formed in the axial direction.
  • the operation section 72 is located on the first valve seat 32 side, and has a smaller diameter than the base section 71.
  • the cleaning member 70 has a base 71 connected to a front end side 65 a of the plunger 65 protruding from the mounting member 73.
  • the base 71 has a larger diameter than the front end side 65a of the plunger 65, and has a concave portion formed on the rear end surface.
  • the front end 65a of the plunger 65 is inserted into the concave portion of the base 71, and the set screw 71a is inserted from the side of the base 71 to connect the two.
  • the operation section 72 is inserted into the valve hole 33 of the first valve seat 32.
  • the cleaning member 70 is provided so as to advance and retreat to the upstream end 33a of the valve hole 33 as the plunger 65 advances and retreats, and removes foreign matter at the upstream end 33a by the operation portion 72 entering the upstream end 33a. Things. That is, the cleaning member 70 is provided so as to be movable in the axial direction.
  • the push-in member 76 is for forcibly advancing the cleaning member 70 in an emergency when the solenoid 63 does not operate normally.
  • the pushing member 76 is of a manual type that displaces the plunger 65 forward by pushing the rear end side 65b of the plunger 65 against the urging force of the coil spring 66.
  • the pushing member 76 is a rod member having a circular cross section.
  • the pushing member 76 is located behind the rear end side 65b of the plunger 65, and is provided coaxially with the center axis X1.
  • a projecting portion 62a projecting rearward is formed at the center of the closing member 62, and the pushing member 76 is provided through the projecting portion 62a.
  • the pushing member 76 is attached to the protrusion 62a by screwing.
  • the pushing member 76 is configured to push (screw) the outside of the closing member 62 with a tool from the outside, thereby pushing the rear end side 65 b of the plunger 65. Thereby, the plunger 65 advances, and the cleaning member 70 advances accordingly. That is, the cleaning member 70 can be forcibly advanced by pushing the pushing member 76 with a force larger than the urging force of the coil spring 66 of the solenoid 63.
  • the second valve mechanism 40 is a thermally responsive valve mechanism that discharges a fluid (for example, air or drain) having a temperature lower than a predetermined temperature and stops discharging a fluid (for example, steam) having a temperature higher than a predetermined temperature.
  • the second valve mechanism 40 opens and closes the second discharge passage 25 and thus the second flow passage.
  • the second valve mechanism 40 includes a valve body unit 41 including a second valve body 42 and a second valve seat 51.
  • the valve body unit 41 is provided in the storage chamber 22 at an upper portion corresponding to a communication location of the second discharge passage 25.
  • the valve body unit 41 has a second valve body 42, a temperature responsive section 43, a holding member 45, a coil spring 46, and a receiving member 47.
  • the temperature responsive section 43 has a base 43a and a diaphragm 43b.
  • the base 43a is formed of two substantially disc-shaped plates.
  • the diaphragm 43b is formed of a plurality of deformable metal thin films.
  • the diaphragm 43b is formed in a substantially disk shape.
  • the second valve element 42 is attached to the diaphragm 43b.
  • a closed space is formed between one of the plates and the diaphragm 43b.
  • An expansion medium (not shown) is accommodated in this closed space.
  • an opening is formed to allow the second valve body 42 to be displaced (moved).
  • the expansion medium is a medium that expands and contracts according to the temperature.
  • the expansion medium is water, a liquid having a lower boiling point than water, or a mixture thereof.
  • the temperature responsive section 43 deforms (displaces) the diaphragm 43b as the expansion medium expands and contracts.
  • the second valve body 42 is displaced (moved) with the deformation of the diaphragm 43b.
  • the temperature responsive unit 43 is displaced in accordance with the temperature of the fluid, thereby displacing the second valve body 42 in the direction of the central axis X2 and detaching and seating on the seat surface 51a of the second valve seat 51 described later.
  • the central axis X2 is the central axis of the second valve seat 51 (valve hole 52).
  • the direction of the central axis X1 coincides with the vertical direction.
  • the upper end surface of the second valve body 42 is a seat surface 42a.
  • the seat surface 42a is formed by a circular flat surface.
  • the seat surface 42a of the second valve body 42 and the seat surface 51a of the second valve seat 51 face each other.
  • the holding member 45 is formed in a cylindrical container shape whose lower end is open. The second valve body 42, the temperature responsive part 43, the coil spring 46, and the receiving member 47 are accommodated in the holding member 45 in order from the top.
  • the coil spring 46 is an elastic member located below the temperature responsive portion 43 and elastically supporting the temperature responsive portion 43 in the direction of the central axis X2.
  • the coil spring 46 allows displacement of the temperature responsive section 43 pushed together with the second valve body 42 when the second valve body 42 is pushed by a pushing mechanism 80 described later.
  • the coil spring 46 indirectly supports the second valve body 42 via the temperature responsive part 43.
  • the coil spring 46 urges the temperature responsive portion 43 toward the second valve seat 51 (that is, upward).
  • the temperature responsive portion 43 is pressed against a locking portion (not shown) of the peripheral wall of the holding member 45 by being urged by the coil spring 46.
  • the receiving member 47 is formed in a substantially disk shape, is located below the coil spring 46, and supports the coil spring 46.
  • the receiving member 47 is supported by a snap ring 48 located below the receiving member 47 and mounted on a peripheral wall of the holding member 45.
  • the valve body unit 41 when the temperature of the temperature responsive section 43 increases, the expansion medium expands, the diaphragm 43b is deformed, and the second valve body 42 is displaced upward and seated on the second valve seat 51. I do.
  • the expansion medium contracts, the diaphragm 43b is deformed, and the second valve body 42 is displaced downward and separates from the second valve seat 51. In this way, the second discharge passage 25, and thus the second flow passage, is opened and closed.
  • the second valve body 42 is separated from the second valve seat 51 at the same temperature as the drain, and the second valve body 42 is seated on the second valve seat 51 at the same temperature as the steam.
  • An expansion medium is employed.
  • the second valve seat 51 is provided at the upstream end of the second discharge passage 25.
  • the second valve seat 51 is formed in a substantially cylindrical shape through which the valve hole 52 penetrates, and extends in the direction of the central axis X2.
  • a flange 51b is formed at the upstream end of the second valve seat 51.
  • the central portion of the flange portion 51b is higher than the periphery thereof, and the end surface thereof is an annular seat surface 51a.
  • the seat surface 51a is flat, and the valve hole 52 is open.
  • the storage chamber 22 and the second discharge passage 25 communicate with each other via a valve hole 52.
  • the second valve seat 51 is provided with an upstream end protruding from the second discharge passage 25 into the storage chamber 22.
  • the seat surface 51a of the second valve seat 51, the second valve body 42, the temperature responsive part 43, the coil spring 46, and the receiving member 47 are provided coaxially with the central axis X2.
  • the pushing mechanism 80 pushes the second valve body 42 in the direction of the center axis X2.
  • the second valve element 42 is separated from the second valve seat 51 by pushing in a direction away from the first valve body 51. That is, the pushing mechanism 80 pushes the second valve body 42 and the temperature responsive part 43 downward to separate the second valve body 42 from the second valve seat 51.
  • the push mechanism 80 is located outside the storage chamber 22 of the main body 11 and downstream of the second valve seat 51, as shown in FIG.
  • “forward” means a direction approaching the second valve seat 51 in the direction of the center axis X2
  • “rear” means a direction away from the second valve seat 51 in the direction of the center axis X2. I do.
  • the push mechanism 80 includes a solenoid 83, a push member 90, and a push member 96.
  • the solenoid 83 is housed in a housing portion 81 formed behind (downstream) the second valve seat 51 in the main body 11.
  • the housing portion 81 is formed in a cylindrical shape coaxial with the central axis X2 (ie, coaxial with the second valve seat 51), and is closed by screwing the closing member 82.
  • the closing member 82 constitutes a cap.
  • the configuration of the solenoid 83 is the same as that of the solenoid 63 of the cleaning mechanism 60. That is, the solenoid 83 is an electromagnetic actuator that includes a solenoid main body 84, a plunger 85 (movable iron core), and a coil spring 86, and forms a driving unit of the pressing member 90.
  • the solenoid body 84 is formed in a substantially cylindrical shape, and is provided coaxially with the central axis X2.
  • the plunger 85 is a shaft member provided to penetrate the solenoid body 84.
  • the plunger 85 extends in the direction of the central axis X2, and is provided coaxially with the solenoid body 84.
  • the plunger 85 is provided with a front end side 85a protruding forward from the solenoid body 84 and a rear end side 85b protruding rearward from the solenoid body 84.
  • the plunger 85 has a flange portion 85c that is located halfway in the axial direction and has a larger diameter than other portions.
  • the flange portion 85c is provided on a rear end side 85b protruding rearward from the solenoid main body 84.
  • the plunger 85 is provided in the solenoid main body 84 so as to be able to move (movable) in the direction of the central axis X2.
  • the coil spring 86 is provided between the rear end of the solenoid body 84 and the flange 85c.
  • the coil spring 86 is an urging member that urges the flange 85c (plunger 85) backward.
  • the plunger 85 instantaneously moves forward against the urging force of the coil spring 86.
  • the plunger 85 instantaneously moves rearward by the urging force of the coil spring 86 and returns to the original position.
  • the accommodation portion 81 has a large-diameter portion 81a and a small-diameter portion 81b similarly to the accommodation portion 61 of the cleaning mechanism 60.
  • the large diameter portion 81a is provided with a mounting member 93 for the solenoid 83.
  • the attachment member 93 is formed in a disk shape, and is provided coaxially with the large-diameter portion 81a (the accommodation portion 81).
  • the mounting member 93 has a front surface (a lower surface in FIG. 4) provided in contact with a step portion 81c between the large-diameter portion 81a and the small-diameter portion 81b, and covers the opening of the small-diameter portion 81b.
  • the mounting member 93 is fixed by a holding member 94.
  • the holding member 94 is formed in a cylindrical shape, and is provided coaxially with the large-diameter portion 81a (the housing portion 81).
  • the pressing member 94 is attached to the large diameter portion 61a by screwing.
  • the pressing member 94 has an outer diameter substantially equal to the outer diameter of the mounting member 93, and fixes the mounting member 93 by pressing the mounting member 93 against the step portion 81c.
  • the solenoid body 84 is housed inside the holding member 94.
  • the solenoid 83 is attached by fixing a solenoid body 84 to a rear surface (an upper surface in FIG. 4) of the mounting member 93.
  • the solenoid body 84 is fixed to the mounting member 93 by a fixing screw 95.
  • the electric wire 87 of the solenoid 83 extends from the front end of the solenoid main body 84 to the outside of the closing member 82 through the inside of the holding member 94.
  • a through hole 93a coaxial with the central axis X2 is formed in the center of the mounting member 93.
  • the front end side 85a of the plunger 85 is inserted into the through hole 93a.
  • the front end side 85 a of the plunger 85 projects forward from the mounting member 93. Seals are provided between the front surface of the mounting member 93 and the stepped portion 81c, and between the through hole 93a of the mounting member 93 and the front end 85a of the plunger 85, respectively.
  • a space between the front surface of the mounting member 93 and the step portion 81c is sealed by a Teflon packing 93b.
  • a space between the through hole 93a of the mounting member 93 and the front end side 85a of the plunger 85 is sealed by two O-rings 93c. Therefore, the fluid discharged from the second valve seat 51 can be prevented from entering the large diameter portion 81a.
  • the push member 90 is connected to the plunger 85 and is driven by the displacement of the plunger 85.
  • the pressing member 90 is formed in a rod shape with a circular cross section, and is provided coaxially with the central axis X2. That is, the pushing member 90 is a rod member extending in the direction of the central axis X2.
  • the pressing member 90 includes a base 91 and an operation unit 92 that are continuously formed in the axial direction.
  • the operation portion 92 is located on the second valve seat 51 side, and has a smaller diameter than the base portion 91.
  • the pushing member 90 has a base 91 connected to a front end side 85 a of the plunger 85 protruding from the mounting member 93.
  • the base portion 91 is formed to have a larger diameter than the front end side 85a of the plunger 85, and a concave portion is formed on the rear end surface.
  • the front end side 85a of the plunger 85 is inserted into the concave portion of the base 91, and the set screw 91a is inserted from the side of the base 91 to connect the two.
  • the operation section 92 is inserted into the valve hole 52 of the second valve seat 51.
  • the push member 90 has one end on the second valve body 42 side inserted into the valve hole 52, and the other end connected to the plunger 85 of the solenoid 83.
  • the pushing member 90 is provided so as to advance and retreat to the second valve body 42 in accordance with the advance and retreat operation of the plunger 85, and the distal end 92 a of the operating portion 92 contacts substantially the center of the second valve body 42 and the second valve body 42 is pushed toward the coil spring 46 side (downward).
  • the temperature responsive part 43 is also pressed toward the coil spring 46 together with the second valve element 42. That is, the pushing member 90 indirectly pushes the temperature responsive part 43 in the direction away from the second valve seat 51 via the second valve body 42.
  • the pushing member 96 is for forcibly moving the pushing member 90 forward in an emergency when the solenoid 83 does not operate normally.
  • the pushing member 96 is of a manual type that displaces the plunger 85 forward by pushing the rear end side 85b of the plunger 85 against the urging force of the coil spring 86.
  • the pushing member 96 is a rod member having a circular cross section.
  • the pushing member 96 is located behind the rear end side 85b of the plunger 85, and is provided coaxially with the center axis X2.
  • the pushing member 96 is provided to penetrate a projecting portion 82 a formed at the center of the closing member 82.
  • the pushing member 96 is attached to the protrusion 82a by screwing.
  • the pushing member 96 is configured to push (screw) the outside of the closing member 82 with a tool from the outside, thereby pushing the rear end side 85b of the plunger 85.
  • the plunger 85 moves forward, and accordingly, the pushing member 90 moves forward. That is, by pushing the pushing member 96 with a force larger than the urging force of the coil spring 86 of the solenoid 83, the pushing member 90 can be forcibly advanced.
  • the drain starts to flow from the inflow port 21 into the storage chamber 22.
  • the air existing in the pipe connected to the inflow port 21 also flows into the storage chamber 22 together with the drain.
  • the drain that has flowed into the storage room 22 accumulates in the lower part of the storage room 22.
  • the first valve body 31 rises and separates from the first valve seat 32.
  • the first valve mechanism 30 opens, and the drain of the storage chamber 22 flows out of the outlet 23 through the first discharge passage 24.
  • the amount of drain flowing from the inlet 21 is larger than the amount of drain discharged from the first valve mechanism 30, the amount of drain increases in the storage chamber 22 and accumulates to the upper part. Then, the temperature of the temperature responsive unit 43 approaches the temperature of the drain.
  • the temperature of the expansion medium of the temperature responsive unit 43 is substantially equal to that of the drain, the volume of the expansion medium (that is, the degree of expansion) is small, and the amount of deformation (displacement) of the diaphragm 43b is small. Therefore, the second valve body 42 remains separated from the second valve seat 51. Therefore, the drain flows into the second discharge passage 25 via the second valve mechanism 40, and flows out from the outlet 23 through the first discharge passage 24.
  • the drain trap 1 allows the inflowing drain and air to flow downstream, while preventing the inflowing steam from flowing out.
  • the cleaning member 70 and the pushing member 90 are in a retracted state (the state shown in FIGS. 2 and 4).
  • the cleaning operation by the cleaning mechanism 60 will be described.
  • the cleaning operation is an operation for removing foreign matter clogged in the upstream end 33a of the valve hole 33 in the first valve seat 32.
  • the upstream end 33a of the valve hole 33 is an orifice, foreign matter such as scale can be clogged.
  • the plunger 65 and the cleaning member 70 are in a retracted state.
  • the operation unit 72 of the cleaning member 70 has been inserted up to just before the upstream end 33 a of the valve hole 33. That is, the operation unit 72 is inserted into the valve hole 33 to such an extent that drainage is not hindered.
  • the cleaning member 70 also moves forward instantaneously, and the operation unit 72 enters the upstream end 33 a of the valve hole 33. As a result, the foreign matter clogged in the upstream end 33a is pushed out and removed by the operation unit 72.
  • the outer diameter of the distal end of the operation section 72 is slightly smaller than the hole diameter of the upstream end 33a. Therefore, the foreign matter clogged in the upstream end 33a can be removed as widely as possible. Further, since the plunger 65 moves forward instantaneously, the forward force acting on the cleaning member 70 can be made a large force (impact force). Therefore, even when the foreign matter at the upstream end 33a is firmly clogged, the foreign matter can be removed by the operation unit 72.
  • the plunger 65 retreats by the above-mentioned fixed distance. That is, the plunger 65 moves in a direction away from the first valve seat 32.
  • the cleaning member 70 retreats with the retreat operation of the plunger 65, and returns to the original position (the position shown in FIG. 2).
  • the forcible valve opening operation by the push mechanism 80 will be described.
  • the forced valve opening operation is performed by forcibly opening the second valve element 42 when the seat surfaces 42a, 51a of the second valve element 42 and the second valve seat 51 in the second valve mechanism 40 are fixed to each other by foreign matter such as scale. This is an operation of opening the valve away from the second valve seat 51.
  • the plunger 85 and the pushing member 90 are in a retracted state.
  • the operating portion 92 of the pushing member 90 is inserted up to just before the upstream end of the valve hole 52. That is, the operation unit 92 is inserted into the valve hole 52 to such an extent that the discharge of the air and the drain is not hindered.
  • the distal end 92a of the operation portion 92 is inserted into the small diameter portion 52a having the smallest hole diameter in the valve hole 52.
  • the tip 92a of the operating portion 92 is partially cut off in order to ensure the necessary cross-sectional area of the fluid in the small diameter portion 52a of the valve hole 52.
  • the second valve mechanism 40 foreign matter such as scale may adhere to the second valve body 42 and the second valve seat 51. Specifically, foreign matter such as scale tends to adhere to the portion where the pressure is reduced.
  • the flow path cross-sectional area between the second valve body 42 and the second valve seat 51 is smaller than that of other parts of the flow path even when the valve is opened. Therefore, each of the second valve body 42 and the second valve seat 51 functions as a throttle, and the drain that passes therethrough is reduced in pressure. Scale easily occurs when the drain is evaporated under reduced pressure. As a result, foreign matter such as scale may adhere to the second valve body 42 and the second valve seat 51.
  • the valve is closed in a state where foreign matter adheres to at least one of the seat surface 42a of the second valve body 42 and the seat surface 51a of the second valve seat 51. There is a possibility that the second valve body 42 cannot be displaced by the temperature responsive portion 43 because it is fixed to the second valve seat 51. Then, in the second valve mechanism 40, the valve cannot be opened, and the air and the drain cannot be discharged.
  • the forcible valve opening operation by the pushing mechanism 80 is performed.
  • the coil of the solenoid body 84 is energized.
  • the plunger 85 instantaneously advances by a certain distance. That is, the plunger 85 moves in a direction approaching the second valve seat 51.
  • the pushing member 90 also moves forward instantaneously, and the tip 92a of the operating portion 92 pushes the second valve body 42 toward the coil spring 46 (downward).
  • the temperature responsive part 43 is also pushed toward the coil spring 46 (downward) together with the second valve body 42.
  • the operating portion 92 pushes the second valve body 42 and the temperature responsive portion 43 against the urging force of the coil spring 46, and the second The valve body 42 and the temperature responsive part 43 can be displaced downward. Thereby, the second valve body 42 can be separated from the second valve seat 51. Therefore, the fixed state between the second valve body 42 and the second valve seat 51 can be eliminated.
  • the coil spring 46 has elasticity that allows the amount of displacement of the temperature responsive portion 43 necessary for separating the second valve body 42 from the second valve seat 51.
  • the drain trap 1 (valve device) of the above embodiment includes the casing 10, the first valve element 31 (valve element), the cleaning member 70, and the solenoid 63.
  • the casing 10 has a fluid flow path in which an upstream end 33a (discharge port) of the valve hole 33 is provided in the middle.
  • the first valve element 31 opens and closes an upstream end 33 a of the valve hole 33.
  • the cleaning member 70 enters the upstream end 33a of the valve hole 33 and removes foreign matter at the upstream end 33a.
  • the solenoid 63 has a plunger 65 that causes the cleaning member 70 to enter the upstream end 33 a of the valve hole 33 by being displaced.
  • the forward force acting on the cleaning member 70 can be made a large force (impact force). That is, the advance input (forward force) to the upstream end 33a of the cleaning member 70 can be increased. Therefore, even when the foreign matter at the upstream end 33a is firmly clogged, the foreign matter can be removed by the cleaning member 70.
  • the cleaning member 70 is a rod member extending in the direction of the central axis X1 of the upstream end 33a of the valve hole 33.
  • the plunger 65 extends in the center axis X1 direction and is displaceable in the center axis X1 direction.
  • One end of the valve hole 33 on the upstream end 33 a side is connected to the cleaning member 70. According to this configuration, the displacement force of the plunger 65 can directly act on the cleaning member 70 as an advance input. Therefore, the driving force of the solenoid 63 can be effectively transmitted to the cleaning member 70.
  • the solenoid 63 has a coil spring 66 (biasing member) that biases the plunger 65 in a direction away from the upstream end 33a of the valve hole 33 in the direction of the center axis X1.
  • the drain trap 1 is a manual type in which the other end of the plunger 65 opposite to the upstream end 33a is pushed against the urging force of the coil spring 66 to displace the plunger 65 to the upstream end 33a.
  • a push member 76 is provided.
  • the cleaning member 70 can be forcibly displaced by the pushing member 76, and foreign matter in the valve hole 33 (upstream end 33a) is removed. can do. That is, since the solenoid 63 is used, the cleaning member 70 can be easily displaced by pushing the plunger 65 against the urging force of the coil spring 66.
  • the drain trap 1 is not limited to a steam trap for preventing discharge of steam, but may be an air trap for preventing discharge of air or a gas trap for preventing discharge of gas.
  • the technology disclosed in the present application is not limited to the drain trap 1 and can be applied to any valve device that controls the flow of gas or liquid as a fluid.
  • the drain trap 1 is described as an example of the valve device.
  • another example is a pump device that includes a valve mechanism and pressure-feeds the inflowing drain.
  • the technology disclosed in the present application is useful for a valve device.
  • Drain trap (valve device) 10 casing 31 first valve body (valve body) 33a Upstream end (discharge port) 63 solenoid 65 plunger 66 coil spring (biasing member) 70 cleaning member 76 pushing member X1 center axis

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne un siphon (1) comprenant : un carter (10) ayant un passage de fluide aménagé à mi-chemin le long de ce dernier et doté de l'extrémité amont (33a) (orifice d'évacuation) d'un trou de soupape (33); une première soupape (31) qui ouvre et ferme l'extrémité amont (33a) du trou de soupape (33); un élément de nettoyage (70) qui entre dans l'extrémité amont (33a) du trou de soupape (33) et qui retire des corps étrangers de l'extrémité amont (33a); et un solénoïde (63) ayant un piston (65) qui, lorsqu'il est déplacé, amène l'élément de nettoyage (70) à entrer dans l'extrémité amont (33a) du trou de soupape (33).
PCT/JP2019/020797 2018-08-02 2019-05-27 Dispositif de soupape WO2020026569A1 (fr)

Priority Applications (1)

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JP2019568411A JPWO2020026569A1 (ja) 2018-08-02 2019-05-27 弁装置

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JP2018-145652 2018-08-02

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WO2020026569A1 true WO2020026569A1 (fr) 2020-02-06

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5853976U (ja) * 1981-10-08 1983-04-12 日東造機株式会社 油圧回路切換用電磁弁
JPS63201298U (fr) * 1987-06-15 1988-12-26
JP2007303631A (ja) * 2006-05-15 2007-11-22 Tlv Co Ltd フロート式スチームトラップ
JP2015229979A (ja) * 2014-06-06 2015-12-21 株式会社テイエルブイ 蒸気システム

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57186769U (fr) * 1981-05-22 1982-11-26
JP6206050B2 (ja) * 2013-09-30 2017-10-04 ダイキン工業株式会社 電磁弁
JP2016056858A (ja) * 2014-09-08 2016-04-21 株式会社テイエルブイ スチームトラップ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5853976U (ja) * 1981-10-08 1983-04-12 日東造機株式会社 油圧回路切換用電磁弁
JPS63201298U (fr) * 1987-06-15 1988-12-26
JP2007303631A (ja) * 2006-05-15 2007-11-22 Tlv Co Ltd フロート式スチームトラップ
JP2015229979A (ja) * 2014-06-06 2015-12-21 株式会社テイエルブイ 蒸気システム

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