JP2011179576A - Feed valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feed valve device capable of preventing a cleaning pin from falling off from a main valve and being lost during assembly in a plant or maintenance work in an installation site. <P>SOLUTION: The feed valve device 100 includes: a feed valve 58 having a main valve 62, a back pressure chamber 82, an introduction aperture 84, a pilot water passage 86, and a pilot valve 88; and the cleaning pin 97 passed through the introduction aperture 84 to slide inside the introduction aperture 84 for exerting cleaning action when the main valve 62 moves forward/backward. In the cleaning pin 97, a latching part 104, which is shaped to bend to a straight shape part 102 sliding inside the introduction aperture 84 and latches in the coming off direction of the cleaning pin 97 with respect to the main valve 62, is arranged in the front edge side part of the cleaning pin 97 through the main valve 62. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a water supply valve device, and more particularly to a water supply valve device provided with a cleaning pin.

2. Description of the Related Art Conventionally, a water supply valve is known in which a main valve is pressed in a valve closing direction with the pressure of a back pressure chamber, and the pressure of the back pressure chamber is controlled by a forward / backward movement of a pilot valve.
This type of water supply valve is (a) a main valve that moves forward and backward toward the main valve seat and opens and closes the main water channel, and (b) a valve formed in the back of the main valve, in which the internal pressure is closed with respect to the main valve. A back pressure chamber that acts as a pressing force for the gas, and (c) an introduction small hole that penetrates the main valve and introduces water on the primary side in the main water channel into the back pressure chamber to increase the pressure in the back pressure chamber; And (d) a pilot water channel that drains water from the back pressure chamber to reduce the pressure in the back pressure chamber, and (e) a pilot valve that opens and closes the pilot water channel.

By the way, in this kind of water supply valve, there is a problem that foreign particles such as fine sand and dust are clogged in the introduction small hole, and if these foreign matters are clogged in the introduction small hole, the primary side water in the main water channel Will not be able to flow into the back pressure chamber through the introduction small hole, and the water supply valve will malfunction.
In many cases, the main valve cannot be closed, causing a problem that water is discharged.

For this reason, in a water supply valve device having this type of water supply valve, a cleaning pin is provided to be inserted through the introduction small hole of the main valve, and the cleaning pin is relatively slid within the introduction small hole when the main valve moves forward and backward. In this way, the introduction small holes are cleaned.
For example, Patent Documents 1 and 2 listed below disclose a water supply valve device provided with a cleaning pin that cleans the introduction holes of the water supply valve and the main valve.

By the way, in the conventional water supply valve device, including those disclosed in Patent Document 1 and Patent Document 2, the cleaning pin has a straight shape until it reaches the tip.
Therefore, when the main valve is disassembled and taken out from other parts during maintenance or the like, the cleaning pin easily comes out of the introduction small hole, that is, the main valve.
At this time, if the cleaning pin is not fixed to other parts and is not fixed as a single part (this is the case in the one disclosed in Patent Document 2), the cleaning that has come off from the main valve is performed. It may be lost by dropping the pin.

Even if the cleaning pin is fixed to other parts, once the cleaning pin comes out of the main valve introduction hole, the cleaning pin is inserted into the introduction hole when reassembling. Therefore, there is a problem that the reassembly is troublesome (this is the same even when the cleaning pin is not fixed and configured as a single part).
Further, when the cleaning pin is fixed to other parts, a fixing member is required separately, and the number of required parts increases.

  In this respect, in the one disclosed in Patent Document 1, the cleaning pin is integrated with the casing on the back pressure chamber side by insert molding, and a separate part for fixing is not required, but the casing on the pressure chamber side is molded. At this time, it is necessary to set the cleaning pin as an insert in a predetermined part of the mold, which complicates the work in forming the part and deteriorates the productivity.

Patent Document 1 discloses that a base end portion of a cleaning pin is bent in an L shape and the base end portion is embedded in a casing on the pressure chamber side during insert molding.
However, the L-shaped bent portion is intended to fix the cleaning pin to the casing on the pressure chamber side and to increase the fixing force. It cannot be solved and is different from the present invention.

JP 2002-250452 A JP 2001-336666 A

  The present invention is based on the above circumstances, and can prevent the cleaning pin from detaching from the main valve during assembly at the factory or maintenance work at the installation site, and can be prevented from being lost. In addition, it is an object of the present invention to provide a water supply valve device that does not require special parts for preventing the cleaning pins from coming off and requires a small number of parts.

  Thus, according to the first aspect, (A) (a) a main valve that moves forward and backward toward the main valve seat and opens and closes the main water channel, and (b) an internal pressure formed behind the main valve. A back pressure chamber that acts as a pressing force on the main valve in the valve closing direction; and (c) a primary side water in the main water channel that passes through the main valve and is introduced into the back pressure chamber. An introduction small hole for increasing the pressure of the pressure chamber; (d) a pilot water passage for reducing the pressure of the back pressure chamber by draining water from the back pressure chamber; and (e) a pilot valve for opening and closing the pilot water passage; And (B) a water supply valve device that has a cleaning pin that is inserted into the introduction small hole and that performs a cleaning action by sliding in the introduction small hole when the main valve moves forward and backward. For the straight-shaped part that slides in the introduction small hole on the tip side of the cleaning pin that penetrates the main valve Ri shape forms a, wherein the hooking portion for hooking the omission direction of the cleaning pin to the main valve is provided.

  According to a second aspect of the present invention, in the first aspect, a coil spring is provided in the back pressure chamber, and one end side of the coil spring contacts the main valve, and the other end contacts the bottom of the back pressure chamber. The cleaning pin is integrally formed with the coil spring so as to extend from the other end side of the coil spring.

  According to a third aspect of the present invention, in any one of the first and second aspects, the introduction small hole is provided at a position eccentric from a center of the main valve, and the latching portion of the cleaning pin is provided on the main valve It is provided with an inwardly curved shape toward the center side.

Effects and effects of the invention

  As described above, according to the present invention, the portion on the tip side of the cleaning pin that has penetrated the main valve is bent with respect to the straight shape portion that slides in the introduction small hole, and is hooked in the removal direction with respect to the main valve. A latching portion for stopping is provided.

  In the water supply valve device of the present invention, when the cleaning pin moves in the removal direction with respect to the main valve, the latching portion that forms the bent shape on the tip side of the cleaning pin is latched on the main valve, It is possible to effectively prevent the cleaning pin from coming off from the main valve and coming off.

Therefore, according to the present invention, it is possible to prevent the cleaning pin from being removed from the main valve and lost during assembly at the factory or maintenance work at the site.
Further, since it is not necessary to insert the cleaning pin once removed into the small opening of the main valve, assembly at the factory and maintenance work at the site are facilitated.

In addition, since it is not necessary to fix the cleaning pin to other parts than the main valve, the number of parts for fixing is not increased, the number of parts required for the water supply valve device can be reduced, and the cost can be reduced. can do.
Further, the number of steps for fixing the cleaning pin to other parts other than the main valve can be eliminated.

In the present invention, the bent shape of the latching portion is deviated within the range of 0.5 to 3.0 mm in the direction perpendicular to the axis from the extension line of the straight shape portion at the end of the bend farthest from the main valve. It is desirable to have a shape located at the position.
The bent portion may have a curved shape, but may also have a linearly inclined shape.
In this case, the angle of the bend is preferably set to an angle within a range of 5 ° to 45 ° with respect to the straight shape portion.
In the present invention, the main valve can be a diaphragm valve.

  In the present invention, a coil spring is provided inside the back pressure chamber, one end of which is brought into contact with the main valve, the other end is brought into contact with the bottom of the back pressure chamber, and extends from the other end of the coil spring. The cleaning pin may be integrally formed with the coil spring in a form (claim 2).

If it does in this way, a cleaning pin can be installed simultaneously with installing a coil spring, and a cleaning pin can be held fixed at the time of advancing and retreating of a main valve. As a result, the cleaning pin can be relatively slid in the introduction small hole as the main valve moves forward and backward, and the cleaning action by the cleaning pin can be exhibited well.
In addition, the coil spring does not need to be fixed by any special fixing means, it can simply be interposed between the main valve and the bottom of the back pressure chamber, so that the coil spring and the cleaning pin can be easily attached. Can do.

  In the present invention, the introduction small hole can be provided at a position eccentric from the center of the main valve, and the above-mentioned latching portion of the cleaning pin can be provided in an inwardly bent shape toward the center side of the main valve. (Claim 3).

It is possible to provide the cleaning pin latching part with an outward curved direction opposite to this, but in this case, the leading end side of the curved cleaning pin is connected to the main valve. When inserting into the hole, it is difficult to see the introduction small hole and it is difficult to work.
However, if the latching part is bent inward, the introduction small hole is easy to see, and therefore the workability when inserting this into the introduction small hole of the main valve is good, and the cleaning pin is assembled to the main valve. There is an advantage that it can be easily performed with good workability.

It is the figure which showed the ball tap apparatus which is an example of the application object of this invention with the internal structure of the washing tank. It is the figure which showed the same ball tap apparatus with the water supply valve apparatus. It is the figure which showed the water supply valve apparatus of one Embodiment of this invention in the same ball tap apparatus with the peripheral part. It is the figure which showed the water supply valve apparatus of FIG. 3 in the valve closing state and the valve opening state. It is a single item figure of the cleaning pin in the embodiment. It is an effect explanatory view of a cleaning pin in the embodiment. It is a figure of the principal part of other embodiment of this invention.

Next, an embodiment when the present invention is applied to a water supply valve device in a ball tap device will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 denotes a cleaning tank having a double tank structure of a resin outer tank 12 and a resin inner tank 14 on the inside thereof.
A resin hand-washing basin 16 that also serves as a lid is provided on the upper part of the outer tank 12, and a hand-washing water discharge pipe 18 is provided on the hand-washing basin 16 in a form standing from the hand basin 16.
A drain outlet 20 is provided at the bottom of the hand basin 16, and the hand wash water discharged from the hand wash water discharge pipe 18 falls from the drain outlet 20 into the cleaning tank 10.

Reference numeral 22 denotes a ball tap device disposed inside the cleaning tank 10, a main body portion 24 of which is attached to the inner tank 14, and a water supply pipe 26 is connected to the main body portion 24.
The water supplied through the water supply pipe 26 is supplied into the cleaning tank 10 by opening a water supply valve 58 shown in FIG. 2 described later of the ball tap device 22, and the water supply is stopped by closing the water supply valve 58.

The ball tap device 22 includes a float 28 that moves up and down in conjunction with the level of the cleaning water in the cleaning tank 10, and a connecting arm 30 that connects the float 28 and the water supply valve 58 (the float 28 and the connecting arm 30). Are all made of resin).
The linking arm 30 has an arm portion 32 and a shaft portion 34 extending downward from the tip thereof, and the float 28 is assembled to the shaft portion 34.

A cleaning handle 36 is rotatably provided on the wall of the cleaning tank 10.
Reference numeral 38 denotes an L-shaped action lever that rotates in conjunction with the cleaning handle 36 inside the cleaning tank 10, and its tip is connected to a drain valve (not shown) via a chain 40.
The drain valve is opened from the closed state by the rotation operation of the washing handle 36, so that the washing water stored in the washing tank 10 vigorously moves from the discharge port at the bottom of the washing tank 10 toward the toilet. It can be discharged.

In FIG. 2, reference numeral 44 denotes a main body in the ball tap device 22 that has a cylindrical shape as a whole.
The water supply pipe 26 of FIG. 1 is connected to the left end portion of the main body body 44 in FIG. 2, and the left end of a socket-like branch pipe 46 that is separate from the main body body 44 and has a cylindrical shape is connected to the right end portion. The part is connected to the external fitting state.
Further, a makeup water pipe 48 is connected to the right end of the branch pipe 46 in the figure.
The makeup water pipe 48 is for supplying makeup water to the toilet. As shown in FIG. 1, the tip end side of the makeup water pipe 48 is assembled to the overflow pipe 42 inside the washing tank 10 via an adapter. Flows into the overflow pipe 42.
In this embodiment, the makeup water pipe 48 is made of a rubber tube.

The branch pipe 46 has a cylindrical water outlet 50 for discharging water from the main body 44 into the washing tank, specifically, the inner tank 14, and a pipe for supplying the water to the hand washing water discharge pipe 18 of FIG. And a supply port 52 having a shape.
In this embodiment, one end side of a water conduit 54 for guiding water from the main body 44 to the hand-washing water discharge pipe 18 shown in FIG. 1 is connected to the supply port 52.
Here, the water guide pipe 54 is formed of a bellows pipe, and the tip side thereof is connected to the hand-washing water discharge pipe 18.

  The washing tank 10 may be provided with a hand washing water discharge pipe 18 as in the washing tank 10 of FIG. 1 or may not be provided with the hand washing water discharge pipe 18. Is not provided, the supply port 52 is opened as it is without connecting the water conduit 54 to the supply port 52.

  That is, in this embodiment, the water conduit 54 is connected to the supply port 52 when the hand wash water discharge pipe 18 is provided, and the water conduit 54 is connected to the supply port 52 when the hand wash water discharge pipe 18 is not provided. First, by leaving the supply port 52 open as it is, it is possible to cope with the case with and without the hand-washing water discharge pipe 18.

Thus, when the washing tank 10 is not provided with the hand-washing water discharge pipe 18 and the conduit pipe 54 is not connected to the supply port 52 but is opened as it is, the water from the main body 44 is supplied to the water discharge port 50. Water is discharged into the cleaning tank 10 from both the mouth 52.
In this case, the supply port 52 becomes a second water discharge port for discharging water into the cleaning tank.

When the water conduit 54 is not connected to the supply port 52, water from the main body 44 is discharged from both the water discharge port 50 and the supply port 52, and the supply port 52 is the same as the water discharge port 50 here. In the direction and downward.
However, in this embodiment, the water outlet 50 and the supply port 52 are provided not diagonally downward but obliquely downward.

In FIG. 2, reference numeral 100 denotes a water supply valve device. The water supply valve device 100 is provided in the main body 24 and communicates with and shuts off a water channel (main water channel) 56; a coil spring 95 shown in FIG. And a cleaning pin 97 integrally formed.
The water supply valve 58 is opened and closed as the connecting arm 30 rotates around the shaft 60 as the float 28 moves up and down.
Specifically, the linkage arm 30 is rotated counterclockwise around the shaft 60 by the rise of the float 28, whereby the water supply valve 58 is closed, and the linkage arm 30 is pivoted as the float 28 is lowered. The water supply valve 58 is opened by rotating around 60 in the clockwise direction in the figure.

Thus, when the water supply valve 58 is opened, the water channel 56 is in a communication state, that is, an open state, and water from the water supply pipe 26 flows from the main body 44 to the branch pipe 46 and from the water outlet 50 of the branch pipe 46. Water is discharged toward the inside of the washing tank 10, and the water is discharged into the hand-washing water discharge pipe 18 through the supply port 52 (when the hand-washing water discharge pipe 18 is provided) or into the washing tank 10 through the supply port 52 (including the hand-washing water discharge pipe 18. If not).
Further, the water flowing into the branch pipe 46 further flows into the toilet from the overflow pipe 42 through the makeup water pipe 48, and the makeup water is supplied to the toilet.

In this embodiment, the water supply valve 58 is a diaphragm type and pilot type valve.
FIG. 3 specifically shows the configuration.
In FIG. 3, reference numeral 62 denotes a main valve in the water supply valve 58, which is a diaphragm valve.
The main valve 62 includes a diaphragm film 66 made of an elastic material such as rubber, and a diaphragm holder 68 that is harder (here, made of resin).

The outer peripheral portion 70 of the diaphragm film 66 is thick, and the outer peripheral portion 70 is vertically sandwiched between the main body 44 and the diaphragm retainer 72 having a cup shape. The outer peripheral portion 70 of the diaphragm film 66 is fixed to the main body 44 by sandwiching them.
Here, the outer peripheral portion 70 of the diaphragm film 66 simultaneously functions as a seal portion, that is, functions to seal and seal the water channel 56 and the outside in a watertight manner.

  The cup-shaped diaphragm retainer 72 is fitted into a cylindrical portion 74 formed integrally with the main body body 44 so as to be fitted in an upward direction from the lower side in the figure, and is externally threaded on the outer peripheral surface of the cylindrical portion 74. The diaphragm retainer 72 is fixed to the cylindrical portion 74, that is, the main body 44 by screwing the female thread portion 78 on the inner peripheral surface of the cap nut 80 to the portion 76.

  That is, in this embodiment, by screwing the cap nut 80 upward in the drawing, the diaphragm retainer 72 fitted in the cylindrical portion 74 is pushed upward, and the diaphragm retainer 72 cooperates with the main body body 44. Thus, the outer peripheral portion 70 of the diaphragm film 66 is tightened to an elastically compressed state with a predetermined tightening allowance.

The cup-shaped diaphragm retainer 72 also has a function as a back pressure chamber forming member, and forms a back pressure chamber 82 behind the lower side of the main valve 62 made of a diaphragm valve in the figure.
The back pressure chamber 82 causes the internal pressure to act on the main valve 62 as a pressing force in the upward valve closing direction in the figure.

On the other hand, the main valve 62 is provided with a through-introducing small hole 84 that allows the primary side of the water channel 56 to communicate with the back pressure chamber 82 at a position eccentric from the center.
The introduction small hole 84 functions to increase the pressure of the back pressure chamber 82 by causing the primary water in the water channel 56 to flow into the back pressure chamber 82.

On the other hand, the diaphragm presser 72 is provided with a pilot water channel 86 as a drainage water channel penetrating through the center thereof.
The pilot water channel 86 serves to drain the water in the back pressure chamber 82 and reduce the pressure in the back pressure chamber 82.

  A pilot valve 88 is provided at the base end portion of the arm portion 32 of the connecting arm 30, and the pilot water passage 86 is closed by the seal portion 90 of the pilot valve 88 seating upward on the pilot valve seat 92.

In this embodiment, the water supply valve 58 operates as follows.
That is, as shown in FIG. 4A, when the water supply valve 58 is closed, the connecting arm 30 is rotated around the shaft 60 by the lowering of the float 28 shown in FIG. When the valve is separated downward in the figure and opened, the water in the back pressure chamber 82 in FIG.
Then, the primary side pressure in the water channel 56 overcomes the pressure in the back pressure chamber 82, and the main valve 62 is opened downwardly from the state shown in FIGS. 3 (A) and 4 (A).

When the main valve 62 is opened, the water channel 56 is in a communication state, and water flows from the main body 44 toward the branch pipe 46 and the makeup water pipe 48 of FIG.
Here, water is discharged from the water outlet 50 and the supply port 52, and makeup water is further supplied from the overflow pipe 42 into the toilet through the makeup water pipe 48.

  On the other hand, when the linkage arm 30 pivots counterclockwise around the axis 60 in FIG. 2 in conjunction with the rise of the float 28, the water in the washing tank is set when the float 28 reaches the rise end. When the water is full, the seal portion 90 of the pilot valve 88 is seated upward on the pilot valve seat 92 and closes, where water outflow from the back pressure chamber 82 stops.

Then, the pressure of the back pressure chamber 82 rises due to the inflow of water into the back pressure chamber 82 through the introduction small hole 84, and the main valve 62 composed of a diaphragm valve is seated upward on the main valve seat 64 by the pressure rise, Close the valve.
Here, the flow of water in the water channel 56 is stopped, and water supply to the washing tank 10 and the hand washing water discharge pipe 18 is stopped.

As shown in FIGS. 3A and 4, a metal coil spring 95 is provided inside the back pressure chamber 82.
The coil spring 95 has its upper end in contact with the main valve 62 and its lower end in contact with the bottom of the back pressure chamber 82, that is, the bottom of the diaphragm retainer 72.
Therefore, the lower end side of the coil spring 95 is held fixed even when the main valve 62 moves back and forth in the vertical direction in the figure.

A cleaning pin 97 extends upward from the lower end side of the coil spring 95 in the drawing, and this cleaning pin 97 is formed in the introduction small hole 84 in the main valve 62, specifically in the diaphragm holder 68. The introduced small hole 84 is inserted and protrudes upward.
When the main valve 62 moves back and forth in FIGS. 3 and 4, the cleaning pin 97 performs a cleaning operation by relatively sliding in the introduction small hole 84. It works to prevent clogging.

  In this embodiment, the cleaning pin 97 is a straight-shaped portion 102 that extends upward in the drawing from the lower end side of the coil spring 95 as shown in FIG. 5 and a tip-side portion that penetrates the main valve 62 upward. And a hooking portion 104 that forms a bent shape (bent shape) with respect to the straight shape portion 102.

  When the cleaning pin 97 moves relative to the main valve 62 in the direction of withdrawal, that is, in the downward direction in the figure, the latching portion 104 is latched on the main valve 62 so that the cleaning pin 97 comes off from the main valve 62 and comes off. To prevent.

In this embodiment, the latching portion 104 having a bent shape has an inclined shape bent at an angle θ with respect to the straight shape portion 102 and has a straight shape in the inclination direction.
In this embodiment, the latching portion 104 having the bent shape has a dimension L in the direction of the extension line P of the straight shape portion 102 in FIG. 5 of 2 mm, an angle θ of 20 °, and a deviation from the extension line P of the tip 106. The quantity x is 0.73 mm.
Further, the latching portion 104 having the bent shape is provided in an inwardly bent shape toward the center side of the main valve 62.
Here, the outer diameter of the cleaning pin 97 is set to φ0.6 mm with respect to the inner diameter φ0.7 mm of the introduction small hole 84.
However, the inner diameter of the introduction small hole 84 and the outer diameter of the cleaning pin 97 change according to the type and characteristics of the water supply valve.

FIG. 6 schematically shows the operation of the cleaning pin 97.
In this embodiment, the cleaning pin 97 is assembled to the main valve 62 as follows.
That is, as shown in FIG. 6A, while holding the coil spring 95 in hand and tilting the whole, the tip 106 of the latching portion 104 is first fitted into the introduction small hole 84 of the main valve 62, and further the cleaning pin Push 97 up in the figure.

At this time, since the latching portion 104 is bent at an angle θ = 20 ° with respect to the straight shape portion 102, as shown in FIG. 6 (II), the shape as it is cannot pass through the introduction small hole 84 upward. .
Therefore, when a strong pressing force is applied to the cleaning pin 97, the latching portion 104 is elastically deformed in the direction of decreasing the angle θ, that is, in the spreading direction, and the latching portion 104 is brought into the introduction small hole 84 with the elastic deformation. Pass upward.

Then, when the latching portion 104 passes through the introduction small hole 84 and protrudes from the main valve 62, the latching portion that has been elastically deformed is restored in shape, and is again bent at an angle θ (FIG. 6A). (III), (IV)).
And the latching | locking part 104 will be in the state which can be latched with respect to the main valve 62 in the removal direction of the cleaning pin 97. FIG.

  After that, by setting the coil spring 95 in the back pressure chamber 82, specifically, the upper end side in the drawing is brought into contact with the main valve 62 and the lower end side is brought into contact with the bottom of the diaphragm presser 72. Thus, the cleaning pins 97 are automatically oriented in the vertical direction in FIG.

FIG. 6B shows a state when the main valve 62 and the cleaning pin 97 are separated from the other together with the coil spring 95.
At this time, the cleaning pin 97 tends to move downward relative to the main valve 62 due to its own weight. However, when the bent hooking portion 104 is hooked on the main valve 62, the cleaning pin 97 is moved to the coil spring 95. At the same time, the main valve 62 is prevented from falling downward in the figure and falling off.

The latching portion 104 of the cleaning pin 97 can be assembled to the main valve 62, that is, the cleaning pin 97 is inserted small until the latching portion 104 penetrates the introduction small hole 84 of the main valve 62 upward in the figure. It is necessary to be able to pass through the hole 84, and on the other hand, when the main valve 62 and the cleaning pin 97 are disassembled from the other, it is necessary that the latching portion 104 does not pass through the introduction small hole 84 downward, For this purpose, it is desirable that the bending angle θ of the latching portion 104 be in the range of 5 ° to 45 °. More desirably, the angle θ is set in the range of 15 ° to 35 °.
Regardless of whether or not the hooking portion 104 is inclined, it is desirable that the amount of displacement x in the direction perpendicular to the axis P with respect to the extension line P of the tip 106 is in the range of 0.5 to 3.0 mm.

  In the water supply valve device 100 of the present embodiment as described above, when the cleaning pin 97 moves in the removal direction with respect to the main valve 62, the latching portion 104 that forms a bent shape on the tip side of the cleaning pin 92 is provided. By engaging with the main valve 62, it is possible to effectively prevent the cleaning pin 97 from coming off from the main valve 62 and coming off.

Therefore, according to the present embodiment, it is possible to prevent the cleaning pin 97 from being removed from the main valve 62 and lost during assembly at the factory or maintenance work at the site.
Further, since it is not necessary to insert the cleaning pin 97 once removed through the introduction small hole 84 of the main valve 62, assembly at the factory and maintenance work at the site are facilitated.

In addition, since it is not necessary to fix the cleaning pin 97 to other parts than the main valve 62, the number of parts for fixing can be reduced, and the required number of parts of the water supply valve device 100 can be reduced. Cost can be reduced.
Further, the number of steps for fixing the cleaning pin 97 to other parts other than the main valve 62 can be eliminated.

  Further, in this embodiment, since the latching portion 104 of the cleaning pin 97 has an inwardly bent shape, the workability when inserting this into the introduction small hole 84 of the main valve 62 is good. The cleaning pin 97 can be easily assembled with good workability.

Although the embodiment of the present invention has been described in detail above, this is merely an example.
For example, in the above embodiment, the latching portion 104 has an inclined shape, but the latching portion 104 may be configured as a curved bent portion as shown in FIG.
In the above embodiment, the water supply valve forms an on-off valve. However, the present invention is suitable for a water supply valve device having a flow rate adjusting function, and the present invention is applied to a water supply valve of a faucet or other water supply. The present invention can be applied to a valve, and the present invention can be configured in various forms without departing from the spirit of the present invention.

56 waterway (main waterway)
58 Water supply valve 62 Main valve 64 Main valve seat 82 Back pressure chamber 84 Introduction small hole 86 Pilot water channel 88 Pilot valve 95 Coil spring 97 Cleaning pin 100 Water supply valve device 102 Straight shape portion 104 Latching portion

Claims (3)

(A) (a) A main valve that moves forward and backward toward the main valve seat and opens and closes the main water channel, and (b) an internal pressure that is formed behind the main valve in the direction of closing the valve with respect to the main valve. A back pressure chamber that acts as a pressing force; and (c) an introduction hole that penetrates the main valve and introduces primary water in the main water channel into the back pressure chamber to increase the pressure in the back pressure chamber. And (d) a water supply valve comprising: a pilot water channel that drains water from the back pressure chamber to reduce the pressure in the back pressure chamber; and (e) a pilot valve that opens and closes the pilot water channel; In the water supply valve device having a cleaning pin that is inserted through the introduction small hole and that performs a cleaning action by sliding in the introduction small hole when the main valve moves forward and backward,
A portion of the cleaning pin that penetrates the main valve has a curved shape with respect to a straight shape portion that slides in the introduction small hole, and is hooked in the direction in which the cleaning pin is pulled out with respect to the main valve. A water supply valve device provided with a latching portion for stopping. In claim 1, a coil spring is provided inside the back pressure chamber, one end side of the coil spring is in contact with the main valve, and the other end side is in contact with the bottom of the back pressure chamber,
The water supply valve device, wherein the cleaning pin is integrally formed with the coil spring so as to extend from the other end side of the coil spring. In any one of Claims 1 and 2, the introduction small hole is provided at a position eccentric from the center of the main valve,
The water supply valve device, wherein the latching portion of the cleaning pin is provided in an inwardly bent shape toward the center side of the main valve.

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