JP3669258B2 - Electromagnetic water supply valve device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is installed in a water supply piping line such as tap water (hereinafter referred to as a line) and opens and closes the pilot orifice of the diaphragm valve with a pilot valve connected to the plunger, thereby interlocking the diaphragm valve. This relates to an electromagnetic water supply valve device in which a flow rate detection device (for example, an impeller type flow rate sensor) is provided on a pilot valve type electromagnetic water supply valve that opens and closes the main valve seat. Without changing the outer shape of the water supply valve, by installing the impeller part of the flow rate detection device on the diaphragm valve part and the magnetic detection device part of the flow rate detection device on the outer peripheral part of the valve body, the flow rate detection at the time of water supply is possible. The present invention relates to an electromagnetic water supply valve device of a pilot valve type equipped with a flow rate detection device.
[0002]
[Prior art]
Conventionally, for example, as shown in FIG. 1, a normally closed pilot valve type electromagnetic water supply valve 10 (hereinafter referred to as a fully-automatic washing machine, a dishwasher, a local washing device, etc.) mounted on a household electric appliance (for example, as shown in FIG. 1). , The conventional valve 10) is integrally formed of a synthetic resin molding member (for example, polypropylene resin) with an inflow port 11, an inflow conduit 12, an inflow chamber 13, a main valve seat 15, an outflow conduit 14, and an outflow port 16. A diaphragm valve 30 (valve element) is installed in the valve body 17 so as to close the main valve seat 15, and a synthetic resin molding member (so as to press the liquid-tight packing portion 33 of the diaphragm valve 30 against the valve body 17). For example, an elastic member (a nylon resin) guide case 40 (the inside is referred to as a back pressure chamber) is held and the pilot orifice 31 of the diaphragm valve 30 is closed on the inner periphery of the guide case 40. For example, a plunger 42 of a hard magnetic member (for example, a stainless steel rod) to which a soft pilot valve 41 (valve body) of silicon rubber is fixed, and a coil spring 43 (for example, a spring that constantly urges and urges the plunger 42). , Stainless steel wire), and a copper wire 44 (eg, enameled wire) called a magnet wire is wound around a cylindrical bobbin 45 (eg, nylon resin) around the outer periphery of the guide case 40. For example, a configuration in which a solenoid (coil) 47 connected to a faston terminal # 250) or a lead wire (electric wire) (for example, soldering, fusing, spot welding, laser welding) is installed is known.
[0003]
In the outer periphery of the inflow port 11, for example, a screw connection or a diameter of a water supply hose or the like is standardized in the industry, such as a thread joint nominal PT3 / 4 and a diameter nominal 20. For example, there are 10 mountains).
In the inner peripheral part of the inlet 11 (the pressure of the inflowing water is referred to as a primary pressure or a high pressure side), a metal filter 50 of about 60 mesh for preventing foreign matter (for example, insects, sand, iron scraps, etc.), In many cases, a flow rate adjusting component or the like is incorporated so that the flow rate is substantially constant regardless of the primary pressure (dynamic water pressure of the line).
[0004]
Although there is an exception, in the case of a flow rate adjustment component when the predetermined water flow rate is less than 10 L / min, as disclosed in, for example, Japanese Utility Model Publication Nos. 59-28796 and 62-18787, upstream Synthetic resin molding member (for example, polyphenylene oxide resin, polyphenylene ether resin, polyacetal resin) on the side and a soft annular disc (hereinafter referred to as flow controller) of an elastic member (for example, nitrile rubber) on the downstream side. It is common to install a flow rate adjusting component having a conical inclined concave shape in which a chamfer is formed in a through hole.
When the primary pressure is supplied to the flow rate adjusting component at a low water pressure (for example, 0.05 to 0.10 MPa [megapascal] or less), the hard cup only presses the flow controller slightly due to the water pressure. , The flowing water passage provided in the hard cup (for example, V groove, stepped groove, etc. in the case of a circumferential arrangement, through hole, etc. in the case of a substantially central portion) is secured as it is, Water below the water flow rate passes.
When the primary pressure is supplied at a medium water pressure (for example, about 0.10 to 0.50 MPa), the hard cup presses the flow controller more strongly than the low water pressure due to the water pressure, and is provided on the hard cup. In addition, the flow control bite into the flowing water passage, the flowing water passage is narrowed, and a predetermined amount of water or less water passes therethrough.
Furthermore, when the primary pressure is supplied at a high water pressure (for example, 0.50 to 0.75 MPa or more), the hard cup almost bites into the flow control by the water pressure, and the flowing water passage is almost blocked, A predetermined amount of water or less will pass through.
[0005]
Although there is an exception, in the flow rate adjustment component when the predetermined water flow rate is about 10 L / min to 35 L / min, for example, as disclosed in FIG. A conical inclined concave shape is formed in the through hole (also referred to as an orifice, which is a flowing water pipe) at the center of the end face so that it is bent due to a change in the water pressure or the flow rate of the fluid, and the sectional area of the flowing water pipe is easily changed. A soft annular disk 52 (hereinafter referred to as a flow sheet) of an elastic member (for example, nitrile rubber) and a hard collar 51 (for backflow) of a synthetic resin molded member (for example, polypropylene resin or polyacetal resin), which may be omitted. It is common to install a flow control part composed of
With respect to the flow rate adjusting component, the flow sheet 52 is bent and deformed by a change in the water pressure or the flow rate of the fluid, and the flowing water pipe 12 which is the substantially central through hole is narrowed. Will pass.
[0006]
The conventional valve 10 is generally provided with a flow rate adjusting component at the inlet 11 as described above. For example, it is disclosed in Japanese Utility Model Laid-Open No. 56-136665, registered utility model No. 3021488, and the like. As shown in the figure, a flow rate adjusting component may be disposed on the outlet 16 side.
[0007]
The inflow conduit 12 is a passage that guides the water in the inflow port 11 to the inflow chamber 13. However, the inflow conduit 12 easily causes cavitation in the inflow conduit 12 (a water hammer for floating the diaphragm valve 30 from the main valve seat 15). In order to ensure pressure), the pipeline is often lengthened. Moreover, since the flow of water becomes turbulent in the flow rate adjusting component, it is necessary to rectify once in order to make cavitation more likely to occur, and rectifying blades (for example, * In many cases.
[0008]
The inflow chamber 13 is a chamber surrounded by the inner wall 20 of the valve body 17 and the outer peripheral portion of the outflow pipe 14, and has a function of propagating water pressure to the diaphragm valve 30. Normally, the cavitation generated in the inflow conduit 12 is lost in the inflow chamber 13.
[0009]
The main valve seat 15 is an end surface portion of the outflow pipe 14. In order to improve the water stop performance, the diaphragm valve 30 has a shape that can easily bite.
[0010]
The outlet 16 is an outlet of the outflow pipe 14. On the outer peripheral portion of the outlet 16, there is an annular convex portion (rib) or the like for preventing the water supply hose or the like from coming off.
[0011]
The diaphragm valve 30 includes a hard disk 35 (for example, polyacetal resin) of a synthetic resin molding member (for example, polyacetal resin) in at least one small hole and one inner hole provided in a soft diaphragm 29 of an elastic member (for example, silicon rubber). 2), by connecting at least one small protrusion 36 and one middle protrusion 37 provided on one side thereof (for example, as disclosed in Registered Utility Model No. 3010806), a plurality of A small hole and a small protrusion may be provided and inserted and coupled.) The small protrusion 36 protrudes from the outer peripheral portion of the diaphragm valve 30, and the inflow chamber 13 and the back pressure chamber 34 (guide case). A side orifice 32 (also referred to as a small hole or a bleed hole) that penetrates the inside (inside), and the middle protrusion 37 protrudes from the center of the diaphragm valve 30, and the back pressure It has to pilot orifice 31 (the bore) through 34 and the back-pressure chamber outlet. Further, a rectifying blade 38 for rectifying the flow of water during water flow is provided on the outer periphery of the middle protrusion 37.
When the diaphragm valve 30 is installed in the valve body 17 so as to close the main valve seat 15, the side orifice 32 comes to the outlet of the inflow conduit 12. This is because the cavitation generated in the inflow conduit 12 is compressed extremely rapidly in the inflow chamber 13 and disappears, causing a rapid pressure rise (water hammer pressure), and the diaphragm valve 30 is moved to the main valve. It is presumed that this is the driving force for floating from the seat 15 or for causing the water in the inflow chamber 13 to flow into the back pressure chamber 34 from the side orifice 32 due to a pressure difference (= water hammer pressure−back pressure chamber pressure). Because.
[0012]
When a current is passed through the solenoid 47 (normally, an AC voltage of 100 V is applied to excite the solenoid), the plunger 42 is attracted to the substantially central portion of the guide case 40 installed inside the solenoid 47. Thus, the pilot valve 30 that has closed the pilot orifice 31 is released. Then, water in the inflow chamber 13 flows into the back pressure chamber 34 from the side orifice 32, passes through the pilot orifice 31 and the back pressure chamber outlet, and flows out to the outflow pipe 14 and the outlet 16. To do. When this passage is opened, the diaphragm valve 30 floats slightly from the main valve seat 15 due to the decrease in the water pressure in the back pressure chamber 34 and the water pressure in the inflow chamber 13. Since the water flowing into the back pressure chamber 34 from the side orifice 32 contracts at one end at the side orifice 32, the pressure is lowered and cavitation occurs. The water in the back pressure chamber 34 undergoes a sudden pressure increase (water hammer pressure) due to the disappearance of cavitation, and constantly presses the diaphragm valve 30 floating from the main valve seat 15, while the outflow pipe line 14. It is presumed that the gas flows out to the outlet 16. And since most of the water in the inflow chamber 13 flows out to the main valve seat 15, the outflow conduit 14, and the outflow port 16, the hydrostatic pressure water in the line is lowered to the dynamic water pressure and becomes a flowing water state. . The flow rate adjusting parts (51, 52) for controlling the flow rate incorporated in the inflow port 11 cause water to contract once, so that the pressure is reduced and cavitation occurs in the inflow conduit 12, and the water disappears in the inflow chamber 13. Then, it is presumed that a sudden pressure increase (water hammer pressure) is caused and the diaphragm valve 30 is suspended from the main valve seat 15. Further, a pressure wave or the like generated due to a rapid pressure increase is not propagated to the line side (or the propagation amount) because the flow of water flows out from the inflow port 11 through the flow path of the outflow port 16. It is estimated that there are few). Therefore, during the valve opening operation of the conventional valve 10, the hydraulic pressure of the line (which decreases when the flow rate is high) is stable.
For reference, when the flow rate adjusting component is not installed, the pressure loss (= primary pressure-secondary pressure) of the conventional valve 10 at the hydraulic pressure of the line is 0.01 MPa to 0.02 MPa. It can be seen that after the disappearance, the primary pressure is almost recovered.
[0013]
Next, when the flow of current to the solenoid 47 is stopped (usually, the AC 100V voltage is cut off and demagnetized), the plunger 42 is returned to a normal position by the coil spring 43, and the pilot valve 41 is moved to the pilot valve. -The orifice 31 is closed. Then, the water flowing into the back pressure chamber 34 from the side orifice 32 loses its place, but as described above, in the back pressure chamber 34, a sudden pressure increase (water hammer pressure) occurs due to the disappearance of cavitation. Since this occurs, the diaphragm valve 30 floating from the main valve seat 15 is pressed against the main valve seat 15. Then, the main valve seat 15 is suddenly closed by the diaphragm valve 30 to stop water, so that the water in the inflow chamber 13 cannot flow into the back pressure chamber 34 from the side orifice 32, and the conventional valve 10 The valve closing operation is completed.
[0014]
Now, for example, in which a conventional flow rate detection device (for example, an impeller-type flow rate sensor) is mounted (attached or integrated) on the valve 10 or the like, for example, Japanese Patent Laid-Open Nos. 5-181539 and 7-289788. As disclosed in publications and the like, there is a technique in which a flow rate detection device (for example, an impeller flow rate sensor, a thermal flow rate sensor, a flow switch) or the like is disposed at the inflow port 11.
[0015]
[Problems to be solved by the invention]
However, in order to replace the existing conventional valve 10 mounted on the home electric device, there is a problem in that it cannot be newly adopted due to the balance between the external restriction of the conventional valve 10 and the empty space in the home electric device. There is a point.
[0016]
Further, the conventional valve 10 has a problem that it is difficult to install (install) the flow rate detecting device because the flow rate adjusting component is already provided on the inlet 11 side.
[0017]
The present invention has been made in view of such problems of the prior art, and the object of the present invention is to detect the flow rate while substantially maintaining the external shape of the existing conventional valve 10 without changing it. It is an object of the present invention to provide an electromagnetic water supply valve device of a pilot valve type equipped with a flow rate detection device that enables this.
[0018]
[Means for Solving the Problems]
In order to achieve the above object, an electromagnetic water supply valve device of the pilot valve type of the present invention includes an inflow chamber, a main valve seat, and an outflow for propagating water pressure to an inflow port, an inflow conduit, and a diaphragm valve into which water flows. A diaphragm valve composed of a soft diaphragm and a hard disk is installed in a valve body integrally formed with a conduit and an outlet through which water flows out so as to close the main valve seat, and the fluid tightness of the diaphragm valve is installed in the valve body. The guide case is held down to press the packing part, and the pilot valve is fixed to the inner periphery of the guide case so that the pilot orifice of the diaphragm valve is closed. In a pilot valve type electromagnetic water supply valve configured to house a biased coil spring and install a solenoid on the outer periphery of the guide case, A hollow impeller having a magnet provided on the outer peripheral portion of the hollow cylindrical shaft of the central portion, characterized in that a magnetic detector to the outer peripheral portion of the valve body.
[0019]
In detail, it characterized by being formed in a good carbon fiber filled plastic durable one underwater wear of at least a hard disk and the impeller.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the invention will be described with reference to the drawings.
FIG. 4 is a front longitudinal sectional view of a single-type normally closed pilot valve type electromagnetic water supply valve device 60 (hereinafter, this device 60) according to an embodiment of the present invention.
In the present apparatus 60, an inlet 11 through which water flows in, an inflow conduit 12, an inflow chamber 13 for propagating water pressure to the diaphragm valve 30, a main valve seat 15, an outflow conduit 14, and an outlet 16 through which water flows out. Is installed in a valve body 17 (which may be made of synthetic resin or brass) so as to close the main valve seat 15, and the fluid tight packing of the diaphragm valve 30 is installed in the valve body 17. The pilot case 41 is fixed so that the pilot orifice 31 of the diaphragm valve 30 is closed on the inner periphery of the guide case 40 so as to press the guide case 40 (for example, nylon resin) so as to press the portion 33. A plunger 42 (for example, a stainless steel rod) and a coil spring 43 (for example, a stainless steel wire) that constantly urges and urges the plunger 42; On the outer periphery of the case 40, a solenoid (coil) 47, which is a copper wire 44 called a magnet wire wound around a cylindrical bobbin 45 and connected to a terminal piece 46 (for example, soldering, fusing, spot welding, laser welding). installed.
[0021]
FIG. 3 is an enlarged perspective view of the hard disk 26 according to one embodiment of the present invention.
The diaphragm valve 30 is formed of, for example, a synthetic resin molded member (in this embodiment, resistant to underwater wear) in at least one small hole and one inner hole provided in the soft diaphragm 29 of an elastic member (for example, fluorine rubber). A good carbon fiber-containing polyacetal resin, but carbon fiber-containing polypropylene resin, carbon fiber-containing nylon resin, or carbon fiber-containing polyether / ether / ketone resin may also be used). A small protrusion 27 and one hollow cylindrical shaft 28 are connected by insertion (for example, as disclosed in registered utility model No. 3010806, etc., a plurality of small holes and small protrusions are provided and inserted and connected. The small protrusions 27 protrude from the outer peripheral portion of the diaphragm valve 30, and the inflow chamber 13 and the back pressure chamber 34. A pilot orifice that includes a side orifice 32 penetrating through the inside of the guide case, and the hollow cylindrical shaft 28 protrudes from the center of the diaphragm valve 30 and penetrates the back pressure chamber 34 and the back pressure chamber outlet. 31 (medium hole) is provided.
A hollow impeller 23 having a magnet 22 (not shown, a rare earth magnet is good) is formed on the outer peripheral portion of the hollow cylindrical shaft 28 (in this embodiment, it is made of a carbon fiber-containing polyacetal resin that is durable against underwater wear. .).
In this embodiment, the impeller 23 has a rotating blade shape having a helical twist. However, although not shown, the impeller 23 may have a rotating blade shape without a helical twist.
[0022]
In the present device 60, the flow rate detection device 21 is an impeller type flow rate sensor. The flow rate detection device 21 includes a hollow impeller 23 having the magnet 22 and a magnetic detection device (magnetic sensing element) 24 portion provided on the outer periphery of the valve body 17 and capable of outputting an electrical signal. Is.
[0023]
The magnetic detection device 24 includes, for example, a reed switch, a Hall IC, a magnetic resistance, a coil, and the like, and is usually a glass tube-enclosed reed contact type normally open contact (also referred to as a contact or make contact). Is frequently used. In terms of cost, a Hall IC (S pole or N pole single pole detection type, S pole and N pole double pole detection type, energy-saving standby type when no detection, etc.) may be advantageous.
The magnetic detection device 24 may be devised so as to be easily disposed (attached) on the outer peripheral portion of the valve body 17 by soldering (electrical connection and / or mechanical fixing) to the printed wiring board 25 or the like.
In this embodiment, the Hall IC is fixed onto the printed wiring board 25 together with the wiring material by soldering and placed in the printed wiring board cover portion, and a potting material (for example, urethane resin, polyester resin, epoxy resin, silicone resin, etc.) Electrical insulating material, adhesive seal material, etc., which are sealed with other materials such as water-proofing material, moisture-proofing material, and anti-condensation material.
[0024]
Although various combinations and the like have been described for the preferred embodiments of the present invention, the present invention is not limited to the embodiments described above, and many combinations and modifications are possible without departing from the spirit of the invention. Of course, etc. can be given.
In the pilot valve type electromagnetic water supply valve device of the present invention, a normally closed type is used, but a normally open type may be used. A self-holding (latch) type in which a magnet (rare earth magnet is preferable) and a solenoid (coil) may be used.
In the impeller portion of the flow rate detection device, for example, each diaphragm valve portion of a normally-closed pilot valve type electromagnetic water supply valve device such as a double-type or triple-type (a single type is one In addition, there may be two impellers in the case of two series, and similarly three in the case of triple series.
[0025]
【The invention's effect】
The pilot valve type electromagnetic water supply valve device of the present invention produces an effect that the flow rate can be detected while substantially maintaining the external shape of the existing conventional valve without changing it.
[Brief description of the drawings]
FIG. 1 is a front longitudinal sectional view of a conventional single-type normally closed pilot valve type electromagnetic water supply valve.
FIG. 2 is an enlarged perspective view of a conventional hard disk.
FIG. 3 is an enlarged perspective view of a hard disk according to an embodiment of the present invention.
FIG. 4 is a front longitudinal sectional view of a single-type normally closed pilot valve type electromagnetic water supply valve device according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Conventional valve, 11 ... Inlet, 12 ... Inflow line, 13 ... Inflow chamber, 14 ... Outlet line, 15 ... Main valve seat, 16 ... Outlet, 17 ... Valve body, 20 ... Inner wall, 21 ... Flow rate Detection device, 22 ... magnet, 23 ... impeller, 24 ... magnetic detection device, 25 ... printed circuit board, 26 ... hard disk, 27 ... small projection, 28 ... hollow cylindrical shaft, 29 ... soft diaphragm, 30 ... diaphragm valve, 31 ... Pilot orifice, 32 ... Side orifice, 33 ... Liquid tight packing part, 34 ... Back pressure chamber, 35 ... Hard disk, 36 ... Small protrusion, 37 ... Medium protrusion, 38 ... Rectifier blade, 40 ... Guide case, DESCRIPTION OF SYMBOLS 41 ... Pilot valve, 42 ... Plunger, 43 ... Coil spring, 44 ... Copper wire, 45 ... Cylindrical bobbin, 46 ... Terminal piece, 47 ... Solenoid, 50 ... Metal filter, 51 ... Cup, 52 ... Annular disc (Flow sheet), 60 ... the device

Claims (2)

The main valve seat is formed in a valve body integrally formed with an inflow port through which water flows in, an inflow conduit, an inflow chamber for propagating water pressure to the diaphragm valve, a main valve seat, an outflow conduit, and an outflow port through which water flows out. A diaphragm valve composed of a soft diaphragm and a hard disk is installed so as to be closed, and the guide case is pressed against the valve body so as to press the liquid-tight packing portion of the diaphragm valve. In order to close the pilot orifice of the diaphragm valve, a plunger to which the pilot valve is fixed and a coil spring that constantly urges the plunger are housed, and a solenoid is installed on the outer periphery of the guide case. the electromagnetic water supply valve configurations pilot valve system, a hollow impeller having a magnet on the outer periphery of the hollow cylindrical shaft of the substantially central portion of the hard disk provided Te, outside of the valve body Electromagnetic water supply valve assembly of the pilot valve system, characterized in that a magnetic detector separate component. Electromagnetic water supply valve assembly of the pilot valve system of claim 1, wherein the formed good carbon fiber filled plastic durable at least one hard disk and impeller in the water wear.

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