JPH0710140Y2 - Switching valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a switching valve capable of arbitrarily switching a fluid flowing into an introduction pipe between a main flow path and a sub flow path.

(Prior Art) Generally, when a water purifier is attached to a faucet or the like and used separately for clean water and normal water, a switching valve is provided between the faucet and the water purifier to clean tap water like drinking water. When it is used for a long time, the sub-flow path of the switching valve is opened to guide it to the water purifier, and when it is used as normal water, the sub-flow path is closed and the main flow path is opened to guide it to the normal water intake. ing.

(Problems to be solved by the invention) However, since the switching operation of the switching valve is manually performed by the user, when the tap water is introduced to the water purifier and then used as normal water, the switching valve is operated. Often forget the switching operation to close the sub-channel side and open the main channel side, and when the user accidentally opens the tap of the water and flows the water into the introduction pipe of the switching valve, it happens that the water intake of the water purifier is taken. If the mouth was facing an awkward direction, the area around the water purifier might become flooded, and if the faucet was a hot water mixed faucet, hot water would flow into the water purifier and the water purification function would deteriorate. Or the water purifier might break down.

This invention is to solve the above-mentioned problems, and when the inflow of the fluid into the introduction pipe is stopped, the main flow path side port is always opened and the sub flow path side port is closed so that the switching operation is simplified and the switching operation is performed. You can prevent forgetting, and by installing this between the faucet of the water supply and the water purifier, the function of the water purifier deteriorates when the water purifier is attached to the hot water mixing faucet or waste water is discharged due to a switching error. It is an object of the present invention to provide a switching valve that can prevent a failure and a failure.

(Means for Solving the Problems) In order to achieve the above object, the present invention relates to a switching valve for guiding a fluid flowing into an introduction pipe to either a main passage or a sub passage through a valve chamber. If a plurality of ribs are provided on the inner peripheral surface of the chamber and the inflow of the fluid to the introduction pipe is stopped after guiding the introduction fluid to the sub passage, the main passage side port is automatically opened and the sub passage side A return means for closing the port is provided, and the return means includes a valve body, an elastic body for crimping the valve body to the sub-flow passage side port to close the valve body, and the valve body against the biasing force of the elastic body for the main flow passage side. A pressing body that presses against the port to close it, and the tip of the pressing body has a predetermined distance from the valve body when the valve body is pressure-bonded to the sub-channel side port.

(Operation) The operation of the present invention based on the above configuration is such that the gap between the ribs provided in the valve chamber constitutes a part of the fluid flow path,
When the flow of fluid into the introduction pipe is stopped after guiding the fluid from the introduction pipe to the sub-flow passage, the valve is pressed by the elastic body and moves while contacting the rib in the valve chamber to close the sub-flow passage side port. The main flow path side port is always open in the valve chamber, and the sub flow path side port is closed by the valve body urged by the elastic body.

(Example) Next, this invention is demonstrated based on the Example shown in an accompanying drawing.

In the figure, 1 is a valve body, 2 is a valve chamber, and an inlet pipe 4 is formed above the valve chamber 2 through an opening 3. Reference numeral 5 is a male screw provided on the outer circumference of the introduction pipe 4. Reference numeral 6 denotes a connector, which is composed of an annular body 7 that can be screwed into the male screw 5 and a tube body 8 fixed to the annular body 7. This tube 8
The upper part of can be fitted with a tap, etc., not shown. Reference numeral 9 is a seal member interposed between the end surface of the introduction pipe 4 and the annular body 7, and has a hole 9 '.

Openings 10 and 11 are installed opposite to each other on the side surface of the valve chamber 2. As shown in FIG. 4, the valve chamber 2 is formed in a circular cross section, and a plurality of ribs 12 are provided on the inner peripheral surface from the opening 10 side toward the opening 11 side. Rib 12
The gap forms a part of the flow path of the fluid and increases the flow rate. Reference numeral 13 is a water intake provided below the vicinity of the opening 10.

Reference numeral 14 is a main flow path case having a groove 14a that is screwed and fixed to the opening 10 side, and a valve seat 15 made of rubber or the like is interposed between the main flow path case 14 and the outer surface of the opening 10 of the valve body 1. In addition, a plurality of circulation ports 1 are provided from the inner surface of the groove 14a toward the outside.
Six are provided. Therefore, when screwing and fixing the valve body 1 to the valve body 1, by matching one of the flow port 16 and the water intake 13, the opening 10 and the hole of the valve seat 15 (main flow path side port) 15a.
The main flow path A is formed by the flow path 16 and the flow port 16. In addition, 17
Is a seal ring attached to the main flow path case 14.

Reference numeral 18 denotes a sub-channel side case that is screwed and fixed to the opening 11 side and has a groove 18a, and a valve seat 19 made of rubber or the like is interposed between the sub-channel side case 18 and the valve body 1. Along with
A plurality of orifices 20 are provided outward from the inner surface of the groove 18a. Therefore, when the sub-flow passage case 18 is screwed into the valve body 1, by aligning one of the orifices 20 with the water intake 21 on the water purifier side (FIG. 3), the holes of the opening 11 and the valve seat 19 are aligned. A sub-flow passage B is formed by the (sub-flow passage side port) 19a and the orifice 20. In addition, 22 is a sub-channel side case
It is a seal ring attached to 18.

Reference numeral 23 is a return means, and the return means 23 is composed of a spherical valve body 24 made of metal or the like, an elastic body 25, and a pressing body 26. One end of the elastic body 25 is fixed to the groove 14a of the main flow path side case 14, and the other end is in contact with the valve body 24, so that the valve body 24 is constantly urged toward the valve seat 19 and the hole 19a (substream). Roadside port) is closed. The pressing body 26 is for pressing the valve body 24 toward the valve seat 15 against the biasing force of the elastic body 25, and is composed of a rod 26a and a knob 26b. Rod 26a
Is inserted into a through hole 18a 'provided in the groove 18a of the sub flow path case 18, and the tip of the valve body 24 has a predetermined distance from the valve body 24 when the valve body 24 is crimped to the hole 19a of the valve seat 19. It is sealed by a seal member 27 such as a ring.

Next, the operation of this invention will be described.

First, while connecting the upper part of the pipe body 8 to the tap of the water supply,
Connect the intake 21 to a water purifier (not shown). In this state, the valve body 24 has an elastic body 25 as shown in FIG.
Since it is in close contact with the hole 19a of the valve seat 19 by the urging force in the direction of arrow a, the auxiliary flow passage B is closed and the main flow passage A is opened. Therefore, to use tap water as ordinary water,
When the faucet of the water supply is opened, the water reaches the inside of the valve chamber 2 through the introduction pipe 6 and the opening 3, and is guided to the water intake 13 through the main flow path A (arrow C). When the water intake from the water intake 13 is completed, the tap of the water supply may be closed.

Next, in order to guide the tap water to the water purifier side, first, the pressing body 26 is grasped and pushed in the direction of the arrow b as shown in FIG. 2 to open the sub-flow path B, and the urging force of the elastic body 25 is resisted. Then, the valve body 24 is brought into close contact with the hole 15a of the valve seat 15 to close the main flow path A. Then, when the tap of the tap is opened, tap water reaches the inside of the valve chamber 2 through the introduction pipe 4 and the opening 3, and is guided from the intake 21 to the water purifier through the sub-flow passage B (see the same figure). Arrow D). While tap water is being guided to the water purifier, the water pressure in the valve chamber 2 rises due to the inflow of water into the orifice 20.
Even when the hand is released from 26, the valve body 24 is maintained in a state of being in close contact with the hole 15a of the valve seat 15.

When the tap of the water supply is closed after the water intake to the water purifier side is completed, the tap water does not flow into the introduction pipe 4. Then, the pressure in the valve chamber 2 returns to the original state, so that the valve body 24 moves in the direction of the arrow a by the urging force of the elastic body 25 to open the main flow path A and to be in close contact with the hole 19a of the valve seat 19. Then, the sub-flow path B is automatically closed.

During the above operation, the valve body 24 reciprocates in the valve chamber 2 when it comes into close contact with and separates from the hole 15a of the valve seat 15 and the hole 19a of the valve seat 19, but the movement is caused by the rib 12 provided on the inner peripheral surface of the valve chamber 2. Adhesion is smooth and reliable. Further, since the valve body 24 is in a free state with respect to the rod 26a, the contact portions between the hole 15a of the valve seat 15 and the hole 19a of the valve seat 19 are constantly changing, so that the tap of the water supply can be opened and closed on a daily basis. Uneven wear of the valve element 24 due to frequent operation can be prevented.

In addition, in the above embodiment, the case where the valve body 24 is made of metal and has a spherical shape has been described, but the shape and material are not limited to this. Further, it goes without saying that the valve seats 15 and 19 are not limited to rubber and may be resin or other material.
Further, the rod 26a of the pressing body 26 and the groove 1 of the sub-flow path side case 18
The sealing member 27 of the through hole 18a 'of 8a is not limited to the O-ring, but other sealing means such as a diaphragm, a boot or the like (neither is shown) may be applied.

(Effect of the Invention) Since the switching valve according to the present invention is configured as described above, the rib gap forms a part of the flow path of the fluid, increases the flow rate, and flows into the introduction pipe. When the flow of the fluid into the introduction pipe is stopped after guiding the fluid to the sub flow passage side, the valve is pressed by the elastic body and moves smoothly while contacting the rib in the valve chamber, automatically opening the main flow passage side port, Moreover, the sub-flow path side port is returned to the closed state. Therefore, it is possible to omit the trouble of switching the fluid to the main flow channel side after guiding the fluid to the sub flow channel side, and prevent forgetting to switch. Therefore, this switching valve is installed in the faucet of the water purifier and the tap, and the tap water is guided to the water purifier side (sub-passage) during the intake of tap water from the frequently used normal water intake (main passage). When
When the water tap is closed after the water is taken into the water purifier, the water intake on the normal water side is automatically opened, and there is no need for a switching operation.

Also, when you use it again as normal water, you do not forget to switch it, so you do not accidentally discharge water from the water purifier side and become a dripping water. Therefore, it has an excellent effect that it is possible to prevent the function of the water purifier from being deteriorated or broken. The tip of the pressing body that closes the valve body of the returning means by pressing it against the main flow path side port has a predetermined distance from the valve body when the valve body is pressure-bonded to the sub flow path side port, so the valve body becomes the pressing body. On the other hand, it is in a free state. Therefore, when the valve body comes into contact with the main flow path side port and the sub flow path side port, the contact portion of the valve body is not constant but always changes, and the valve body due to frequent opening and closing of the faucet Uneven wear can be prevented.

Since uneven wear can be prevented in this way, even if switching is frequently performed, the main flow passage side port and the sub flow passage side port can be reliably closed by the valve body, and problems such as leakage do not occur.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIGS. 1 and 2 are front sectional views, FIG. 3 is a right side view, and FIG. 4 is a valve taken along line XX in FIG. It is sectional drawing of a chamber. Explanation of reference numerals 1 ... Valve body, 2 ... Valve chamber 4 ... Introduction pipe 15a ... Valve seat hole (main flow path side port) 19a ... Valve seat hole (sub flow path side port) 23 ... Return means, 24 …… Valve body 25 …… Elastic body, 26 …… Pressing body

Claims (2)

[Scope of utility model registration request] 1. A switching valve for guiding a fluid flowing into an introduction pipe to either a main flow path or a sub flow path via a valve chamber, wherein a plurality of ribs are provided on an inner peripheral surface of the valve chamber, When the inflow of the fluid into the introduction pipe is stopped after the fluid of the introduction pipe is guided to the sub-flow passage, a return means for automatically opening the main flow passage side port and closing the sub flow passage side port is provided, and the return means is A valve body, an elastic body for crimping and closing the valve body on the auxiliary flow passage side port, and a pressing body for pressing the valve body against the main flow passage side port against the biasing force of the elastic body to close the valve body. The switching valve is characterized in that the tip of the pressing body has a predetermined distance from the valve body when the valve body is crimped to the sub-flow passage side port. 2. The switching valve according to claim 1, wherein the introduction pipe can be attached to a faucet such as water.