JP4879075B2 - Multi-function check valve device - Google Patents

Description

  The present invention relates to a check valve device, and more particularly to a multi-function check valve device having a drainage function that can drain water by forcibly opening the check valve by pushing a drainage operation portion.

Normally, a check valve device that prevents reverse flow from the faucet body to the water supply side is incorporated into the faucet while securing water supply to the faucet body side.
In cold water faucets, a check valve device having a function of draining water is used. Specifically, a drainage operation part is assembled to the valve casing in the axial direction facing the check valve, and the check valve is forcibly opened by pushing the drainage operation part in the axial direction to drain the water. A check valve device having a function of performing is used.

FIG. 7 shows a specific example of a check valve device having this seed draining function.
In the figure, 200 is a check valve device, 202 is a cylindrical valve casing having a radially inflow opening (casing opening) 204 on the peripheral wall, and 208 is a check valve assembled to the valve casing 202. is there.
The check valve 208 includes a check valve body 210 that constitutes a main element thereof, a spring 212 that urges the check valve body 210 in a valve closing direction, and a valve guide 214 that guides the movement of the check valve body 210.

  The check valve body 210 is configured to open and close the outlet 206 at the shaft end of the valve casing 202 by being seated on or separated from the valve seat 220 downward, that is, a valve portion 216 for opening and closing the flow path, The shaft portion 218 extends upward from the portion 216 in the figure, and the shaft portion 218 is slidably inserted into the valve guide 214.

  The check valve 208 causes the check valve body 210 to flow when the feed water flows in a forward direction indicated by an arrow in the figure through a flow path passing through the inflow opening 204 of the valve casing 202, the inside of the valve casing 202, and the outflow opening 206 at the shaft end. The valve is opened downward in the figure against the urging force of the spring 212 to allow the forward flow of water supply, while the reverse valve body 210 closes against the reverse flow. It works to block the flow of direction.

Reference numeral 222 denotes a push rod as a water draining operation unit which is assembled to the valve casing 202 so as to be movable in the axial direction while facing the check valve 208 in the axial direction. As shown in FIG. Is pushed downward in the drawing to force the check valve 208, more specifically the check valve body 210 to open downward, thereby opening the flow path and draining water upstream of the check valve 208. Is called.
Reference numeral 224 denotes a strainer that removes foreign matter from the feed water flowing into the valve casing 202 through the inflow opening 204 by filtration, and is assembled to the valve casing 202.

  By the way, regardless of whether it is a cold district, a stop cock is generally provided in the middle of the water supply pipe to the faucet. The operation for draining water in a cold region is to first operate the water stop cock to bring the piping to a water stop state, that is, after stopping the water supply to the water faucet, push the push bar 222 to operate the water. Unplug.

  However, in general, this stop cock is separate from the check valve apparatus 200 incorporated in the faucet, for example, in a bathroom, the check valve apparatus 200 is used as a faucet inside the bathtub, and the stop cock is installed. It is built into the underfloor piping. Therefore, when draining water, first, operate the stop cock provided in the underfloor piping, stop the water, and then check the check valve of the faucet in the bathroom. There is a problem that the water draining operation must be performed in the device 200, and the water stop device and the check valve device 200, which are separate devices, must be operated at different locations, and the water draining operation is troublesome. It was.

  In some cases, there is no stop cock that should be provided in the middle of the piping at the time of construction. In this case, in order to drain water, the main stopper provided on the most upstream side is closed and Water must be drained by operating the check valve device 200 incorporated in the stopper, and the draining operation must be performed every day in a normal cold region, which is extremely troublesome.

The following Patent Document 1 and Patent Document 2 disclose a multifunction check valve device having a flow rate adjusting function, a water stop function, and a water drain function.
If the multi-function check valve device disclosed in these Patent Documents 1 and 2 is used, the water stop operation and the water drain operation can be performed at the same one place, which is excellent in convenience.
However, those disclosed in Patent Document 1 and Patent Document 2 have a problem that the number of required parts is large, the number of assembling steps is increased, the structure is enlarged, and the cost is further increased.

JP 2000-145983 A JP 2002-98257 A

  In the present invention, the water stop operation and the water drain operation can be performed at the same place in the background as described above, and the number of required parts and the number of assembling steps can be reduced, so that the flow rate is compact and inexpensive. The object of the present invention is to provide a multi-function check valve device having an adjustment function, a water stop function, a check valve function, and a water drain function.

  Thus, according to the first aspect of the present invention, (a) a cylindrical valve casing having a casing opening extending in the radial direction on the peripheral wall, and (b) an assembly of the casing opening and the inside of the valve casing A check valve that allows a forward flow of the flow path through the flow path and prevents a reverse flow; and (c) is assembled to the valve casing in a state of facing the check valve in the axial direction. A drainage operation part that drains water by forcibly opening the check valve by pushing the direction, and the drainage operation part is rotatably attached to the valve casing. The operation part is formed in a cylindrical shape so as to be rotatably fitted to the inner peripheral surface of the valve casing, and the position of the radially opening valve opening formed in the peripheral wall is changed relative to the casing opening by rotation, The valve opening is completely inconsistent with the casing opening Cylinder type that closes the flow path and stops water, opens the flow path by overlapping the valve opening in the radial direction with respect to the casing opening, and adjusts the flow rate by changing the overlapping area The water stop valve is provided in an integrally rotating state.

  According to a second aspect of the present invention, in the first aspect, the outer peripheral surface of the water stop valve is sealed between the water stop valve and the valve casing, and has a shape corresponding to the position corresponding to the valve opening. A cylindrical elastic sealing material having an opening is fixed.

  A third aspect of the present invention provides the stopper according to any one of the first and second aspects, wherein the stop valve defines a rotational direction position at a fully closed position in a water stop state and a fully open position in which the flow rate is a maximum flow rate. Is provided.

Effects and effects of the invention

  As described above, according to the first aspect of the present invention, the drainage operation part is rotatably assembled to the valve casing, and the drainage operation part is provided with a cylinder type water stop valve. The valve opening that is rotatably fitted to the peripheral surface and that is formed in the peripheral wall in the radial direction is changed in position relative to the casing opening by rotation, and the valve opening is completely inconsistent with the casing opening. Closed and water-stopped, opened the flow path by overlapping the valve opening in the radial direction with respect to the casing opening, and provided a cylinder-type water-stop valve that adjusts the flow rate by changing the overlapping area in an integrated rotation state It is a thing.

  In the check valve device according to the first aspect, the flow control operation and the water stop operation can be performed by rotating the water drain operation unit, and the water drain operation unit is pushed in the axial direction under the water stop state. Therefore, the drainage operation can be performed by forcibly opening the check valve.

  In other words, it is possible to perform water stoppage and water drainage after the water stop operation by simply rotating the water drainage operation unit and then pushing it in. The same check valve device can be used for waterstop and water drainage. Therefore, the operation for draining can be performed very easily.

  In addition, in the check valve device according to the first aspect, since the water draining operation part also serves as the operation part of the cylinder-type water stop valve, it is not necessary to provide a separate operation part in the water stop valve. The configuration can be simplified and the apparatus can be made compact.

  In this first aspect, the cylinder type water stop valve is integrally rotated in the rotational direction with respect to the drainage operation portion, and is relatively movable in the axial direction, that is, only the drainage operation portion is moved in the axial direction. Although it is possible to provide the water stop valve, it is possible to integrally form the water stop valve so as to move both in the rotational direction and in the axial direction with respect to the drainage operation portion. In this case, it is possible to reduce the number of required parts and assembly man-hours of the apparatus, and it is possible to configure the apparatus more compactly and inexpensively.

In this invention, the cylindrical elastic sealing material which has an opening of the shape corresponding to the position corresponding to a valve opening which seals between the water stop valve and a valve casing on the outer peripheral surface of a water stop valve according to Claim 2 Can be fixed.
By using such a cylindrical sealing material as an elastic sealing material that seals between the water stop valve and the valve casing, the water stop valve with the seal material can be made inexpensive and configured compactly. Can do.

Here, the elastic sealing material can be fixed (baked and fixed) to the outer peripheral surface of the water stop valve at the same time as the molding.
In particular, the elastic sealing material can be a rubber sealing material, and can be vulcanized and bonded simultaneously to the outer peripheral surface of the water stop valve at the time of vulcanization molding of the rubber sealing material.

According to the third aspect of the present invention, it is possible to provide a stopper that defines the rotational direction position at the fully closed position where the water stop valve is in the water stop state and the fully open position where the flow rate is the maximum flow rate.
If it does in this way, the operativity at the time of rotating a drain operation part and performing water stop and flow control will become favorable.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 3, reference numeral 10 denotes a multi-function check valve device (hereinafter simply referred to as a check valve device) according to the present embodiment, and 12 denotes a valve casing having a cylindrical shape as a whole.
The valve casing 12 is composed of a lower first member 12-1 and an upper second member 12-2 in the drawing.
The upper second member 12-2 in the figure is provided with a radially inward inner flange portion 14 and a radially outward outer flange portion 16, and as shown in FIG. A male screw portion 18 is provided on the outer peripheral surface, and a female screw portion 20 is provided on the inner peripheral surface.

On the other hand, as shown in FIG. 3, the first member 12-1 is provided with a male screw portion 22 on the outer peripheral surface of the upper end portion in the drawing, and the first screw member 12 and the female screw portion 20 have the first member 12. -1 and the second member 12-2 are screwed together in the axial direction.
The valve casing 12 is provided with a plurality of (two in this case, 180 °) inflow openings (casing openings) 24 penetrating the peripheral wall in the radial direction in the intermediate portion in the axial direction. An outflow opening 26 is provided at the shaft end.

  Reference numeral 28 denotes a check valve assembled to the valve casing 12. The check valve 28 includes a check valve body 30 as a main element thereof, a spring 32 that urges the check valve body 30 in a valve closing direction, and a check valve body. And a valve guide 34 for guiding 30 movements.

  The check valve body 30 is seated on the valve seat 36 or spaced downward in the figure to open and close the outflow opening 26, that is, a valve portion 38 for opening and closing the water supply flow path, and a shaft extending upward in the figure. The shaft portion 40 is inserted in the valve guide 34 so as to be movable in the axial direction, and the upper end side in the drawing protrudes upward from the valve guide 34. A spring receiver 42 is fixed to the protruding end.

The valve guide 34 has an inner cylinder 44, an outer ring 46, and an arm that connects them in the radial direction, and an opening through which water is passed in the axial direction is formed between the inner cylinder 44, the outer ring 46, and the arm. ing.
Here, the valve guide 34 is fixed to the outer ring 46 so as not to move in the axial direction by a stepped portion 48 of the valve casing 12 and a retaining ring 50 attached to the valve casing 12.

The spring 32 is provided in such a state that the lower end in the figure is brought into contact with the valve guide 34 and the upper end in the figure is brought into contact with the spring receiver 42. An urging force is exerted on the valve body 30 upward in the drawing, that is, in the valve closing direction.
In FIG. 1, 52 is a strainer mounted on the outer peripheral surface of the valve casing 12.
The strainer 52 serves to remove foreign substances from the feed water flowing into the valve casing 12 through the inflow opening 24 by filtration.

In FIG. 1 to FIG. 3, reference numeral 54 denotes a push rod as a water draining operation unit, which is assembled to the valve casing 12 so as to be movable in the axial direction while facing the check valve 28 in the axial direction.
The push rod 54 is provided in a state of being inserted through the opening 58 inside the inner flange portion 14 in the valve casing 12.
The push rod 54 is integrally formed with a large-diameter flange portion 60 inside the valve casing 12, and the push rod 54 is secured from the valve casing 12 in the axial direction by the flange portion 60.

Further, as shown in FIGS. 3 and 4, an annular groove 56 is provided in the upper portion of the portion protruding from the valve casing 12 to the outside, and a knob 57 is formed on the upper side of the annular groove 56 in the drawing. Has been.
The push rod 54 can be pulled up in the figure by picking the knob 57.
An engaging groove 61 that is linear in the diameter direction is also provided at the upper end of the push bar 54. The push rod 54 can be rotated by inserting a tool into the engagement groove 61 and engaging it.

The push rod 54 is integrally formed with a cylinder-type water stop valve 62 that also serves as a flow rate adjusting valve at a lower position of the flange portion 60.
The annular groove 64 formed between the water stop valve 62 and the flange portion 60 is provided with an elastic seal material 66 having a U-shaped cross section. The elastic seal material 66 allows the push rod 54 and the valve casing 12 to be connected to each other. The space between them is sealed tightly.

The cylinder-type water stop valve 62 has a cylindrical shape, and an outer peripheral surface thereof is rotatably fitted to an inner peripheral surface of the valve casing 12.
The water stop valve 62 has an opening shape at the lower end in the axial direction, and the peripheral wall has a number corresponding to the inflow opening 24 in the valve casing 12 (that is, two separated by 180 ° here). The valve opening 68 is provided in a form penetrating in the radial direction.
Here, as shown in FIG. 3, the inflow opening 24 in the valve casing 12 and the valve opening 68 of the water stop valve 62 each have a rectangular front shape.

A cylindrical elastic sealing material (here, made of rubber) 70 having an opening 72 having a corresponding shape at the position of the valve opening 68 is fixed to the outer peripheral surface of the water stop valve 62.
Here, the elastic sealing material 70 is vulcanized and bonded (baked and fixed) to the outer peripheral surface of the water stop valve 62 simultaneously with the vulcanization molding.
The elastic sealing material 70 is integrally formed with a rib 74 protruding on the outer peripheral surface. Here, the rib 74 is formed so as to form a square shape as a whole.

Strictly speaking, an outer peripheral surface of the cylinder-type water stop valve 62 is rotatably fitted to the inner peripheral surface of the valve casing 12 via the elastic sealing material 70. The space between the inner peripheral surface of the valve casing 12 is sealed in a watertight manner by the elastic sealing material 70.
Here, the elastic sealing material 70 is in close contact with the inner peripheral surface of the valve casing 12 so as to compressively elastically deform the rib 74 in the radial direction, and has a sealing action.

In the check valve device 10 of the present embodiment, the push rod 54 serving as a water draining operation unit is rotated, whereby the cylinder-type water stop valve 62 configured integrally therewith is rotated with respect to the valve casing 12. .
As shown in FIG. 1, the water supply flows into the valve casing 12 from the inflow opening 24 of the valve casing 12 under the condition that the valve opening 68 of the water stop valve 62 completely coincides with the inflow opening 24 of the valve casing 12. Then, the check valve 28 is opened by the flow, and flows out from the outlet 26 at the lower end of the valve casing 12 in the figure.
At this time, the flow rate of the flow path passing through the inflow opening 24, the inside of the valve casing 12, and the outlet 26 becomes the maximum flow rate.

When the water stop valve 62 is rotated in this state, the valve opening 68 of the water stop valve 62 gradually decreases the overlap area while maintaining the radial overlap (overlap) with respect to the inflow opening 24 of the valve casing 12. Along with this, the flow rate of the feed water flowing through the flow path is gradually decreased.
Then, in a state where the valve opening 68 is completely inconsistent with the inflow opening 24 of the valve casing 12 (the state shown in FIG. 5), the inflow opening 24 is completely closed by the water stop valve 62, and the flow path is blocked here. The water stops.

As shown in FIGS. 3 and 4, the flange portion 60 of the push rod 54 and the valve casing 12 include a fully closed position where the water stop valve 62 is in a water stop state, and a fully open position where the flow rate is a maximum flow rate. A stopper for defining the position in the rotational direction is provided.
Specifically, the valve casing 12 is provided with a notch 78 over a predetermined circumferential length, and a pair of circumferential ends of the notch 78 are stoppers 78-1 and 78-2 on the valve casing 12 side. Further, the flange portion 60 on the one push rod 54 side is provided with a stopper 76 projecting radially outward, and the stopper 76 on the flange portion 60 side is connected to the stopper 78-1 on the valve casing 12 side or 78-. 2, the rotational position of the water stop valve 62 is defined.
Specifically, the stop valve 62 and the stopper 78-1 come into contact with each other to position the water stop valve 62 in a fully open state, and the stopper 76 comes into contact with the stopper 78-2 to fully close the water stop valve 62. Positioned to state.

Here, the stopper 76 is provided on the push rod 54 side, but in some cases, this is provided in a protruding state on the outer peripheral surface of the water stop valve 62 itself, corresponding to the inner peripheral surface of the valve casing 12 correspondingly. It is also possible to provide a stopper for this purpose.
In short, by providing a stopper on each of the side that rotates integrally with the water stop valve 62 and the valve casing 12 side, the water stop valve 62 can be positioned at the fully open position and the fully closed position, respectively. is there.

In the check valve device 10 of this embodiment, as shown in FIG. 5, the water stop valve 62 can be brought into a closed state, that is, a water stop state by rotating the push rod 54 as a water draining operation unit. it can.
Then, as shown in FIG. 6, by pushing the push bar 54 in the axial direction and downward in the figure, the check valve 28 can be forcibly opened to drain the water.

  As described above, according to the present embodiment, the flow control operation and the water stop operation can be performed by rotating the push rod 54, and the push rod 54 is pushed in the axial direction under the water stop state. The drainage operation can be performed by forcibly opening the check valve 28.

  In this embodiment, the water stop and the water drain can be performed by operating the same operation portion (push bar 54) in the same check valve device 10 and the operation for draining can be performed very easily. Can do.

  Further, since the push rod 54 also serves as an operating portion of the cylinder type water stop valve 62, it is not necessary to provide a separate operation portion for the water stop valve 62, thereby simplifying the device configuration and reducing the size of the device. can do.

  Furthermore, in this embodiment, since the water stop valve 62 is integrally formed with the push rod 54, the required number of parts and assembly man-hours of the apparatus can be reduced, and the apparatus can be configured more compactly and inexpensively.

  Moreover, since the cylindrical elastic sealing material 70 which seals between the water stop valve 62 and the valve casing 12 adheres to the outer peripheral surface of the water stop valve 62, the water stop valve 62 with an elastic seal material can be made inexpensive. It can be configured and can be effectively compacted.

  Further, in the present embodiment, the stopper 76 and the stopper portions 78-1 and 78- that define the rotational direction position in each of the fully closed position where the water stop valve 62 is in the water stop state and the fully open position where the flow rate is the maximum flow rate. 2 is provided, the operability when rotating the push rod 54 to stop water and adjust the flow rate is improved.

  The check valve device 10 of the present embodiment includes a push rod 54 as a water draining operation unit in a state in which a water stop valve 62 that also functions as a flow control valve is fitted in the valve casing 12 inside the valve casing 12. The outer shape of the check valve device is the same as that of the conventional check valve device shown in FIG. 7, and therefore, for example, the check valve device shown in FIG. In addition, the check valve device 10 shown in FIG. 1 can be newly incorporated into the faucet without any shape change on the faucet side, and thereby a water stop and flow rate adjusting function can be added.

Although the embodiment of the present invention has been described in detail above, this is merely an example.
For example, in the above example, the push rod 54 and the water stop valve 62 as the water draining operation unit are integrally configured so as to move integrally in the axial direction as well as the rotation direction. It is also possible to move the stop valve 62 integrally with the push rod 54 so as to move relative to the push rod 54 only in the rotational direction, and to move relative to the push rod 54 in the axial direction (for example, male serration on the outer peripheral surface of the push rod 54). For example, by providing a female serration portion on the water stop valve 62 side and connecting them by serration). In addition, this invention can be comprised in the form which added various change in the range which does not deviate from the meaning.

It is sectional drawing of the non-return valve apparatus which is one Embodiment of this invention. It is the figure which decomposed | disassembled and showed the check valve apparatus of the embodiment to each component. It is a partially cutaway perspective view of the principal part of FIG. FIG. 4 is a diagram illustrating the configuration and operation of the main part of FIG. 3. It is operation | movement explanatory drawing of the embodiment. FIG. 6 is an operation explanatory view different from FIG. 5 of the same embodiment. It is a figure which shows an example of the conventional check valve apparatus.

Explanation of symbols

10 Multifunctional check valve device 12 Valve casing 24 Inflow opening (casing opening)
26 Outflow opening 28 Check valve 54 Push rod (drainage operation part)
62 Water stop valve 68 Valve opening 70 Elastic seal material 72 Opening 76 Stopper 78-1, 78-2 Stopper

Claims (3)

(A) a cylindrical valve casing having a casing opening in the radial direction on the peripheral wall; and (b) a forward flow of a flow path assembled to the valve casing and passing through the casing opening and the inside of the valve casing. A check valve that allows and prevents reverse flow; and (c) is assembled to the valve casing so as to face the check valve in the axial direction, and the check valve is operated by pushing in the axial direction. A drainage operation part that drains water by forcibly opening the valve,
The drainage operation part is rotatably assembled to the valve casing, and the drainage operation part has a cylindrical shape and is rotatably fitted to the inner peripheral surface of the valve casing to form a peripheral wall. The position of the radially opened valve opening is changed with respect to the casing opening by rotation, and the valve opening is completely inconsistent with the casing opening to close the flow path to stop water, A cylinder-type water stop valve that adjusts the flow rate by opening the flow path by overlapping the valve opening in the radial direction with respect to the casing opening and changing the overlapping area is provided in an integrally rotating state. A multi-function check valve device.   In Claim 1, the cylindrical elastic which has an opening of the shape corresponding to the position corresponding to the said valve opening which seals between this water stop valve and the said valve casing on the outer peripheral surface of the said water stop valve A multi-function check valve device, wherein a sealing material is fixed.   The stopper according to any one of claims 1 and 2, wherein the stop valve is provided with a position in the rotation direction at a fully closed position where the water stop state is set and a fully open position where the flow rate is a maximum flow rate. Multi-function check valve device.

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