JP7441675B2 - Open/close valve device - Google Patents

Description

The present disclosure relates to an on-off valve device.

Patent Document 1 discloses an on-off valve for a water faucet. The on-off valve is switched to discharge and stop water by pressing a button.

JP2017-67182A

In an on-off valve device that can be switched to discharge water and shut off water, there is a need for a technology that reduces the water hammer sound that occurs when water is shut off.

The present disclosure was completed based on the above circumstances, and an object of the present disclosure is to provide an on-off valve device that can reduce water hammer noise.

In the on-off valve device of the present disclosure, an inlet and an outlet are formed, one of the inlet and the outlet is a first opening, and the first opening is different from the inlet and the outlet. a water passing member having a second opening; a resistor that reduces the flow path area at the first opening when the valve is closed; and after the flow path area at the first opening is reduced by the resistor; and a valve body that closes the second opening.

1 is a longitudinal cross-sectional view showing a shower head device according to a first embodiment. It is an exploded perspective view of an on-off valve device and a holding mechanism. It is an exploded perspective view showing a 2nd connection member, a water passage member, and a resistor. It is an exploded perspective view showing a water passage member, a valve body, and a 1st connection member. It is a sectional view of an on-off valve device in a valve open state. 6 is a sectional view taken along the line VI-VI in FIG. 5. FIG. It is a sectional view of the on-off valve device at the time of the first pressing operation. It is a sectional view of the on-off valve device immediately after the first pressing operation. FIG. 3 is a sectional view of the on-off valve device in a closed state.

<Embodiment 1>
The shower head device 10 is used by gripping the grip portion 13 in a bathroom or the like. The shower head device 10 can also be used by being hung on a shower hook (not shown) attached to a bathroom wall W, as shown in FIG. An upstream end of the shower head device 10 is connected to one end of a water supply hose 11. The other end of the water supply hose 11 is connected to a hot water mixing faucet (not shown). The water supply from the water supply hose 11 to the shower head device 10 and the water stop can be switched by the user operating the hot water mixing faucet. In the present disclosure, "water" includes hot water whose temperature is adjusted in a hot water mixing faucet device. In the following description, the side opposite to the bathroom wall W shown in FIG. 1 is the front side of the shower head device 10, and the side of the bathroom wall W is the rear side of the shower head device 10. The left-right direction is the left-right direction when the shower head device 10 is viewed from the front side. The up-down direction is an up-down direction along the vertical direction.

The shower head device 10 includes a cover member 12, a sprinkler plate 14, a button 17, a holding mechanism 20, a first connection member 30, a second connection member 40, and an on-off valve device 50. The cover member 12 constitutes the outer shape of the shower head device 10. The water sprinkling plate 14 is formed with a plurality of water sprinkling holes 15 passing through the water sprinkling plate 14 in the thickness direction. The water that has flowed into the shower head device 10 passes through the water sprinkling holes 15 and is sprayed from the surface side of the water sprinkling plate 14 .

The button 17 is an operation section for switching the on-off valve device 50 between a valve open state and a valve closed state. The button 17 is provided on the front side of the grip portion 13 and is operated by pressing toward the rear. When the button 17 is pressed, the holding mechanism 20 and the on-off valve device 50 are activated, and the on-off valve device 50 is alternately switched between an open state and a closed state. According to such a configuration, when the user presses the button 17 at hand, the shower head device 10 can easily temporarily shut off water, contributing to water conservation.

The holding mechanism 20 alternately moves and holds the control shaft 51 of the on-off valve device 50 between the valve open position shown in FIG. 5 and the valve closed position shown in FIG. 9 every time the button 17 is pressed. As shown in FIG. 2, the holding mechanism 20 includes a transmission member 21, a cam body 22, and a rotor 23. The transmission member 21 converts the power from the button 17 side into a direction along the axial direction of the control shaft 51 and transmits it to the rotor 23 . The operation mode of the holding mechanism 20 is the same as that of a known alternate mechanism that displaces the rotor 23 in two steps, up and down relative to the cam body 22, and its explanation will be omitted. The rotor 23 contacts the upper end of the control shaft 51 and defines the upper end position of the control shaft 51 .

As shown in FIG. 2, the first connection member 30 is connected to the upstream side of the on-off valve device 50 (water passage member 60 described later). The first connecting member 30 has an upstream water passage 31 formed therein. The second connection member 40 is connected to the downstream side of the on-off valve device 50 (water passage member 60). The second connecting member 40 has a downstream passageway 41 (see FIG. 3) formed therein. Water flowing into the on-off valve device 50 from the upstream water passage 31 flows out into the downstream water passage 41 through the on-off valve device 50. The on-off valve device 50 is an on-off valve that switches water supply from the first connection member 30 to the second connection member 40 and water shutoff.

As shown in FIGS. 2 and 5, the on-off valve device 50 includes a control shaft 51, a water passage member 60, a resistor 70, a valve body 80, a back pressure chamber 90, a pilot flow path 91, and a pilot valve 92. . The control shaft 51 has an elongated rod shape and is arranged at the center of the water passage member 60. The upper end of the control shaft 51 projects upward from the water passage member 60 and contacts the rotor 23 .

The water passage member 60 is a cylindrical member in which a water passage 61 is formed. The water passage member 60 has an inlet 62 and an outlet 64 formed therein. Outlet 64 corresponds to the first opening, and inlet 62 corresponds to the second opening. The inflow port 62 opens downward at the lower end of the water passage member 60 . A valve seat 63 on which a valve body 80 is seated is provided at the opening edge of the inflow port 62 . The outflow port 64 is formed above the inlet 62 in the water passing member 60 so as to penetrate the water passing member 60 in the radial direction. The water passage member 60 is provided with a wall portion 65 at the top. A through hole 66 is formed in the wall portion 65, and the control shaft 51 is inserted into the through hole 66.

The resistor 70 is a member that restricts the flow rate at the outlet 64, as shown in FIG. The resistor 70 is arranged inside the water passage member 60. The resistor 70 is provided integrally with the control shaft 51 and interlocks with the control shaft 51. As shown in FIG. 3, the resistor 70 has an extending portion 71 extending radially outward from the control shaft 51, and an annular portion 72 connected to the tip of the extending portion 71. . Three extension parts 71 are provided at equal intervals in the circumferential direction around the control shaft 51. The plurality of extension parts 71 are arranged radially and allow water to pass inside the annular part 72. The annular portion 72 is arranged so as to overlap the outlet 64 from the water passage 61 side when the resistor 70 rises the most. The annular portion 72 gradually reduces the flow path area at the outlet 64 as the resistor 70 rises.

The valve body 80 is a member that opens and closes the inlet 62, as shown in FIGS. 5 and 9. The valve element 80 closes the inlet 62 by seating on the valve seat 63 and opens the inlet 62 by moving downward away from the valve seat 63. The valve body 80 has a tapered portion 81 whose diameter decreases upward, and a seal member 82 provided below the tapered portion 81. When the valve body 80 is closed, the tapered portion 81 enters the inlet 62 and the seal member 82 comes into watertight contact with the valve seat 63.

The valve body 80 is separate from the resistor 70. The valve body 80 temporarily separates from the control shaft 51 and rises at a slower speed than the resistor 70 when the valve is closed. The valve body 80 is provided with a through hole 84 that passes vertically through the center. On the back side (lower side) of the valve body 80, a second cylindrical portion 97 is provided integrally with the valve body 80. The internal space of the second cylindrical portion 97 communicates with the through hole 84 to form a pilot flow path 91 .

The back pressure chamber 90 is formed on the back side of the valve body 80. The back pressure chamber 90 is formed by a first cylindrical portion 93 having a cylindrical shape with a bottom and a movable portion 94 that moves up and down inside the first cylindrical portion 93 . The movable part 94 is provided integrally with the pilot valve 92. The back pressure chamber 90 is formed with a hole 95 that communicates with the upstream water passage 31 located upstream of the valve body 80 . The hole 95 is small enough to adjust the moving speed of the valve body 80 in the valve closing direction, as will be described later. The hole 95 penetrates the bottom of the first cylindrical portion 93 and communicates with the upstream water passage 31 . The back pressure chamber 90 allows water to flow into the interior through the hole 95, thereby allowing the valve body 80 to move in the valve closing direction. A spring 96 is provided in the back pressure chamber 90 to bias the pilot valve 92 in the valve closing direction. One end of the winding forming the spring 96 is inserted into the hole 95 so that it can move forward and backward.

The pilot flow path 91 is a water drainage path that communicates with the back pressure chamber 90. An elongated rod-shaped insertion portion 99 extending in the axial direction of the control shaft 51 is inserted into the pilot flow path 91 so as to be movable forward and backward. The pilot flow path 91 is a gap formed between the through hole 84 of the valve body 80 and the internal space of the second cylindrical portion 97 when the insertion portion 99 is inserted into the through hole 84 of the valve body 80 and the internal space of the second cylindrical portion 97. It is. The second cylindrical portion 97 is inserted into the first cylindrical portion 93 above the pilot valve 92 so as to be able to move forward and backward. A pilot valve seat 98 on which the pilot valve 92 is seated is provided at the opening edge on the lower end side of the second cylindrical portion 97 . The pilot channel 91 discharges water in the back pressure chamber 90 to the water passage 61 located downstream of the valve body 80. The insertion portion 99 is a member that transmits power from the control shaft 51 to the pilot valve 92. When the pilot valve 92 is closed, the upper end of the insertion portion 99 projects upward from the through hole 84 of the valve body 80 (see FIG. 9). From this state, when the insertion portion 99 moves downward relative to the valve body 80, the pilot valve 92 separates from the pilot valve seat 98 and opens.

The pilot valve 92 is a member that opens and closes the pilot flow path 91. The pilot valve 92 closes the pilot flow path 91 by seating on the pilot valve seat 98, and opens the pilot flow path 91 by moving downward away from the pilot valve seat 98. The pilot valve 92 is provided at the lower end of the insertion portion 99. That is, the valve body 80 and the pilot valve 92 are arranged side by side in the axial direction of the control shaft 51. The pilot valve 92 is biased toward the valve closing direction by a spring 96, and is maintained in the closed state when no force is applied to the insertion portion 99 from the control shaft 51.

The operation of each part in the on-off valve device 50 will be explained. In the open state of the on-off valve device 50, the control shaft 51 is held at the valve open position by the holding mechanism 20, as shown in FIG. In the valve open position of the control shaft 51, the resistor 70 is located below the outlet 64, and the valve body 80 is spaced downward from the valve seat 63 of the inlet 62. In the open state of the on-off valve device 50, water flows into the inlet 62 from the upstream water passage 31, passes through the water passage 61, and flows out from the outlet 64 to the downstream water passage 41 (Fig. 6 reference). In this way, water is passed through the on-off valve device 50 and water is sprayed from the shower head device 10.

When switching the on-off valve device 50 from the open state to the closed state, the user presses the button 17, as shown in FIG. The pressing operation for switching the on-off valve device 50 from the open state to the closed state is also referred to as the first pressing operation. In the first pressing operation, the holding mechanism 20 is activated and the control shaft 51 is once pushed down below the valve opening position. The valve body 80 and the movable part 94 move downward as they are pushed by the control shaft 51 . When the movable part 94 moves downward within the second cylindrical part 97, the water in the back pressure chamber 90 is drained and the back pressure chamber 90 contracts. At this time, the pilot valve 92 is in an open state, and the water in the back pressure chamber 90 is mainly discharged into the water passage 61 through the pilot flow path 91.

When the button 17 is released after the first pressing operation, the holding mechanism 20 is activated and the flow pressure of the water flowing through the water passage member 60 causes the rotor 23 and the control shaft to move as shown in FIG. 51 and the resistor 70 move upward. The rotor 23 moves further upward beyond the valve open position shown in FIG. 5, and the resistor 70 moves from the valve open position in a direction to throttle the flow rate at the outlet 64. When the rotor 23 reaches the valve-closed position, upward movement of the rotor 23 is restricted, and the control shaft 51 and the resistor 70 are held at the valve-closed position. When the control shaft 51 and the resistor 70 are in the closed position, the resistor 70 acts as a flow path resistance and the flow rate at the outlet 64 is throttled. From the viewpoint of reducing water hammer noise, the flow rate of the outlet 64 throttled by the resistor 70 is preferably 30% or more and 70% or less, and 40% or more and 60% or less of the flow rate in the open state shown in FIG. % or less, and even more preferably about 50%.

When the control shaft 51 starts moving toward the valve closing position as described above, the control shaft 51 separates from the insertion portion 99 and the pilot valve 92 moves upward by the biasing force of the spring 96, as shown in FIG. do. When the pilot valve 92 is seated on the pilot valve seat 98, the pilot flow path 91 is closed. The water pressure in the back pressure chamber 90 becomes smaller than the water pressure in the upstream water passage 31 due to the biasing force of the spring 96, and water gradually flows into the back pressure chamber 90 from the hole 95. When water flows in from the hole 95, the movable part 94 gradually moves upward depending on the volume of the water flowing in. When the movable part 94 moves, the valve body 80 gradually moves upward in conjunction with the movable part 94. That is, the moving speed of the valve body 80 in the valve closing direction is set according to the flow rate of water flowing in from the hole 95 (for example, the volume of water passing through the cross section of the hole 95 in unit time). When the on-off valve device 50 is closed, the moving speed of the valve body 80 in the valve closing direction is set smaller than the moving speed of the control shaft 51 and the resistor 70 to the valve closing position. When the valve body 80 is seated on the valve seat 63 of the water passage member 60, the inflow of water from the upstream water passage 31 to the inlet 62 is blocked, and the valve closing in the on-off valve device 50 is completed as shown in FIG. . In other words, when the on-off valve device 50 is closed, the flow rate at the outflow port 64 is throttled by the resistor 70 as shown in FIG. 8, and then the valve body 80 closes the inflow port 62 as shown in FIG. do. In this way, water is temporarily shut off by the on-off valve device 50, and water spraying from the shower head device 10 is stopped.

When switching the on-off valve device 50 from the closed state to the open state, the user presses the button 17 again. The pressing operation for switching the on-off valve device 50 from the closed state to the opened state is also referred to as a second pressing operation. In the second pressing operation, the holding mechanism 20 is activated and the control shaft 51 is once pushed down below the valve closing position. In the closed state of the on-off valve device 50, the pilot valve 92 is closed as described above, and the upper end of the insertion portion 99 projects upward from the through hole 84 of the valve body 80. The upper end of the insertion portion 99 is pushed down by the control shaft 51 and moves downward to the same height as the upper surface of the valve body 80. When the pilot valve 92 moves downward in conjunction with the insertion portion 99, the pilot valve 92 opens and the pilot flow path 91 is opened. When the pilot flow path 91 is opened, the pressure inside the back pressure chamber 90 decreases, and the movable part 94 and the valve body 80 can be pushed down with a small force. When the control shaft 51 moves downward, the movable part 94 moves downward as it is pushed by the control shaft 51. Then, the water in the back pressure chamber 90 is mainly drained from the pilot flow path 91. After the upper end of the insertion part 99 is lowered to the same height as the upper surface of the valve body 80, the valve body 80 is pushed down together with the movable part 94 by the control shaft 51, and the valve opens. The resistor 70 moves downward together with the control shaft 51 to open the outlet 64. When the valve body 80 opens and the resistor 70 opens the outlet 64, water flow to the on-off valve device 50 is resumed, and water is sprayed from the shower head device 10.

When the button 17 is released after the second pressing operation, the holding mechanism 20 is activated and the flow pressure of the water flowing through the water passage member 60 causes the rotor 23 and the control shaft to move as shown in FIG. 51 and the resistor 70 move upward. When the rotor 23 reaches the valve open position, upward movement of the rotor 23 is restricted. Then, upward movement of the control shaft 51 and the resistor 70 is restricted, and the holding mechanism 20 holds the control shaft 51 and the resistor 70 at the valve open position. The valve body 80 returns to the position in the valve-open state described above in conjunction with the control shaft 51 and the resistor 70 (see FIG. 5).

The effects of this embodiment will be explained. The on-off valve device 50 of the present embodiment includes a water passing member 60 in which an inlet 62 and an outlet 64 are formed, a resistor 70 that reduces the flow path area at the outlet 64 when the valve is closed, and a resistor 70. The valve body 80 closes the inflow port 62 after the flow path area at the outflow port 64 is reduced. According to this configuration, since the valve body 80 closes after the flow rate is throttled by the resistor 70, the change in water pressure at the time of valve closing can be alleviated compared to a configuration that does not include the resistor 70. Can reduce hammer noise.

In this embodiment, the valve body 80 is separate from the resistor 70. According to such a configuration, a configuration in which the flow rate is throttled by the resistor 70 and then the valve is closed by the valve body 80 can be realized in a compact manner. For example, in a configuration in which the valve body is integrally provided on the control shaft, the resistor 70 and the valve body 80 move at the same time. It is necessary to design the position and size of each part, and there is a concern that the on-off valve device 50 will become larger. On the other hand, in this embodiment, for example, by shifting the timing of movement of the resistor 70 and the valve body 80, the flow rate can be throttled by the resistor 70 and then the valve can be closed by the valve body 80. The degree of freedom in designing each part increases. Such a configuration is particularly effective in the shower head device 10 where the size of the installation space is limited.

In this embodiment, the resistor 70 moves in a direction to reduce the flow rate at the outlet 64 due to the flow pressure of water flowing through the water passage member 60 . According to such a configuration, there is no need to provide a biasing member such as a spring to move the resistor 70, which contributes to a reduction in the number of parts and miniaturization of the on-off valve device 50.

The on-off valve device 50 of this embodiment includes a back pressure chamber 90 formed on the back side of the valve body 80. The back pressure chamber 90 is formed with a hole 95 that communicates with the upstream water passage 31 located upstream of the valve body 80 . The valve body 80 moves in a direction in which water flows into the back pressure chamber 90 through the hole 95 and closes the inlet 62 . According to such a configuration, the speed at which the valve body 80 moves can be adjusted according to the flow rate of water flowing into the back pressure chamber 90, and after the flow rate is throttled by the resistor 70, the valve body 80 is closed. Easy to adjust timing.

The on-off valve device 50 of this embodiment includes a pilot passage 91 that communicates with a back pressure chamber 90 and a pilot valve 92 that opens and closes the pilot passage 91. In the on-off valve device 50, the pilot valve 92 opens, water in the back pressure chamber 90 is drained from the back pressure chamber 90, and the valve body 80 opens the inlet 62. According to such a configuration, when the valve is opened, water can be quickly drained from the back pressure chamber 90, and the force required to open the valve body 80 can be reduced.

<Other embodiments>
The present disclosure is not limited to the embodiments described above and illustrated in the drawings, and, for example, the following embodiments are also included within the technical scope of the present disclosure.
(1) The on-off valve device may be configured such that, when the valve is closed, the resistor reduces the flow path area at the inlet and the valve body closes the outlet.
(2) In addition to the embodiments described above, the configurations of the water passing member, the valve body, and the resistor can be changed as appropriate. For example, the outflow port may be provided at the upper end of the water passage member so as to open upward. The valve body may be integrated with the resistor. The valve body may be separate from the second cylindrical portion.
(3) The resistor may be moved not only by the flow pressure of water flowing through the water passage member but also by a biasing force such as a spring.
(4) The moving speed of the valve body may be adjusted by another mechanism without providing a back pressure chamber on the back side of the valve body.
(5) The holding mechanism may be another alternative mechanism such as a heart cam mechanism.
(6) The on-off valve device may be provided in a faucet device other than the shower head device.

31... Upstream water passage, 50... Opening/closing valve device, 60... Water passing member, 62... Inlet (second opening), 64... Outlet (first opening), 70... Resistor, 80... Valve body, 81 ... Tapered part, 82 ... Seal member, 90 ... Back pressure chamber, 91 ... Pilot flow path, 92 ... Pilot valve, 95 ... Hole

Claims (5)

An inflow port and an outflow port are formed, one of the inflow port and the outflow port is a first opening, and one of the inflow port and the outflow port that is different from the first opening is a second opening. a water component;
a resistor that reduces the flow path area in the first opening when the valve is closed;
a valve body that closes the second opening after the flow path area in the first opening is reduced by the resistor ,
The resistor is an on-off valve device that moves in a direction to throttle the flow rate in the first opening due to the flow pressure of water flowing through the water passage member . An inflow port and an outflow port are formed, one of the inflow port and the outflow port is a first opening, and one of the inflow port and the outflow port that is different from the first opening is a second opening. a water component;
a resistor that reduces the flow path area in the first opening when the valve is closed;
a valve body that closes the second opening after the flow path area in the first opening is reduced by the resistor;
a back pressure chamber formed on the back side of the valve body,
The back pressure chamber is formed with a hole communicating with an upstream water passage located upstream of the valve body,
The valve body is an on-off valve device in which water flows into the back pressure chamber from the hole and moves in a direction to close the second opening. The on-off valve device according to any one of claims 1 and 2, wherein the valve body is separate from the resistor. A back pressure chamber is formed on the back side of the valve body,
The back pressure chamber is formed with a hole communicating with an upstream water passage located upstream of the valve body,
Any one of Claim 1 and Claim 3 dependent on Claim 1, wherein the valve body moves in a direction in which water flows into the back pressure chamber from the hole and closes the second opening. The on-off valve device described in . a pilot flow path communicating with the back pressure chamber;
A pilot valve that opens and closes the pilot flow path,
Claim 2, Claim 3 dependent on Claim 2, wherein the pilot valve opens and the water in the back pressure chamber is drained from the pilot flow path, and the valve body opens the second opening. and the on-off valve device according to claim 4 .

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