JPH03213777A - Check valve - Google Patents

Abstract

PURPOSE:To obtain a check valve which can be assembled easily and of which energizing force is adjustable by respectively providing magnetic members in a valve member and a holding member constructing a check valve, and opposing the magnetic members against each other with the magnetic force in the opposite directions, and energizing the valve member to the closing direction with the resiliency. CONSTITUTION:Magnetic members 14, 15 respectively provided in a valve member 11 and a holding member constructing a check valve are opposed against each other by the magnetic force in the opposite directions, and the valve member 11 is energized to the closing direction by the resiliency. A check valve which can be assembled easily thereby functions excellently. Furthermore, adjustment of the energizing force of the valve member is possible by enabling the adjustment of vertical position of the magnetic members with screw or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a check valve that is provided in a water passageway and can prevent backflow in the water passageway.

(Prior art and its problems) Conventionally, a check valve installed in a water passage of a faucet fitting, etc. has a structure as shown in FIG. A valve body 53 is provided in a state where it is pressed through a valve 52, and this valve body 53 is in contact with the valve seat portion 54 of the inflow port P. The valve body 53 rises against the biasing force of the spring 52, allowing water to be guided into the water passageway R, and conversely, the water pressure wb from the water passageway R side presses the valve body 53 toward the valve seat portion 54 side. Therefore, the structure is designed to effectively prevent backflow.

In such a conventional structure, it is necessary to assemble the valve body 53 integrally with the spring 52, which poses a problem in that assembly is troublesome and difficult. Furthermore, although it may be desired to change the biasing force of the spring 52 as necessary, such a change is difficult, and it is extremely difficult to adjust the opening/closing force of the valve body 53 in response to changes in the amount of water flowing. There was a problem.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and is extremely easy to assemble into a water passage, etc., and can easily adjust the opening/closing force according to the flow rate, etc. The purpose is to provide an adjustable check valve, the gist of which is to provide a check valve that can prevent backflow by opening and closing a valve body movably held by a holding member, the valve body having a magnetic Along with the body attached,
The holding member is also provided with a magnetic material.

(Operation) The valve body and the holding member that make up the check valve are each provided with a magnetic body, and normally the magnetic body in the holding member and the magnetic body in the valve body are separated from each other by magnetic force in the direction of separating them from each other. If the holding member is fixed, the valve body will be biased in the closing direction by the repulsive force, and can perform the function of a check valve well. For example, if the magnetic material in the holding member is By adjusting the distance, the repulsive force can be easily changed and the opening/closing force of the valve body can be easily adjusted.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 and 2 show a first embodiment, which relates to a check valve installed in a mixing water frame.

As shown in FIG. 1, a water pipe 2 through which water can be introduced and a hot water pipe 3 through which hot water can be introduced are formed on both sides of the mixing faucet 1, and each has a water handle 4 and a hot water handle 5. The flow rate can be adjusted. Further, a mixing chamber 6 is formed inside, and an appropriate amount of hot water and water are mixed in the mixing chamber 6, and hot water can be discharged from the water spouting lower a through the water spouting pipe 7.

In such a mixing faucet 1, for example, the check valve 10 disposed near the water handle 4 is explained as follows: A pair of disc valves 8.8 that are opened and closed by the operation of the water handle 4.
A check valve 10 is disposed on the downstream side of the disc valve 8 via a valve seat member 9.The configuration of the check valve 10 is shown in an enlarged sectional view in FIG. The valve body 11 is mainly composed of a valve body 11 that can be moved laterally by the pressure of water flowing into the water passage R through the passage R, and a holding member 12 that holds the valve body 11. It is fixed to the valve seat member 9 etc. via. Therefore, the holding member 12 side is fixed, and the sliding shaft portion 11a of the valve body 11 is slidable within the guide groove 2a formed in the holding member 12. Also, the valve body 11
An O-ring O is fitted onto the tip of the sliding shaft 11a, and a permanent magnet 14 is fitted into the sliding shaft 11a. On the other hand, a permanent magnet 15 is also fitted into the left end portion of the holding member 12.

In such a configuration, the permanent magnet 14 in the sliding shaft portion 11a and the permanent magnet 15 in the holding member 12 are arranged with opposing magnetic poles facing each other, and the repulsion of the magnetic poles causes the permanent magnet 14 to move against the holding member 12. The valve body 11 is set in a completely separated state. Therefore, since the holding member 12 is fixed, the valve body 11 is pressed by the valve seat member 9 and closes the water passage R. By operating the water handle 4 against the repulsive force of the permanent magnets 14 and 15, water can press the valve body 11 to the left and flow into the mixing chamber 6 through the water passage R. Conversely, it is impossible for the water to flow backward from the mixing chamber 6 side to the woodwind 2 side because the valve body 11 is in a closed state.
It has a structure that effectively prevents backflow.

Valve body 1 due to repulsive force between permanent magnet 14 and permanent magnet 15
The closing force for the first valve seat member 9 is set in advance by selecting the permanent magnets 14 and 15 so that the repulsive force can correspond to the water pressure.

In such a configuration, since a spring for urging the valve body 11 as in the conventional case is not required, the valve body 11 can be assembled to the holding member 12 very easily, and the check valve 10 can be assembled very easily. The entire assembly is extremely easy. Furthermore, the closing force of the valve body 11 can be easily changed by appropriately adjusting the magnetic force of either or both of the permanent magnets 14 and 15 (by replacing the permanent magnet, etc.). Incidentally, the permanent magnet 15 can also be constituted by, for example, an electromagnet.

Next, FIG. 3 shows a second embodiment.

That is, in this example, the resin coating portion 22 made of a resin film or the like is completely formed on the wall surface of the water passage R, and this resin coating portion 2
A holding side magnetic body 21 made of a permanent magnet or the like is disposed on the outside of the valve 2, and a guide groove 21a is formed in a concave shape, and the valve body 23 can move in and out along the guide groove 1a. A permanent magnet 24 is embedded in the shaft portion 23a of the valve body 23. Further, the tip of the valve body 23 is a packing part 23b, which can come into contact with the inlet P.

Even in such a configuration, the packing portion 23b of the valve body 23 is biased in the direction of closing the inlet P due to the repulsive force between the holding side magnetic body 21 and the permanent magnet 24, and a good backflow prevention function can be achieved. I can do it.

The resin coating portion 22 is provided to effectively prevent the holding side magnetic body 21 from rusting. It is preferable that the valve body 23 and the shaft portion 23a are also made of resin, so that rust can be effectively prevented from forming.

Next, FIG. 4 shows a third embodiment.

That is, in this example, the same valve body 2 as in the second embodiment is used.
3 is used, and this valve body 23 is disposed so as to be retractable into a guide groove 25a formed in a resin case body 25, and a magnetic valve body 23 is used so as to be movable to the outside of the resin case body 25. A body 26 is provided. The magnetic body 26 can be made of, for example, a permanent magnet, and is configured such that its vertical position can be adjusted from above using a screw or the like. Therefore, by adjusting the vertical position of the magnetic body 26 with a screw or the like, the repulsive force against the permanent magnet 24 inside the valve body 23 can be adjusted.
The pressing force against the inlet P can be easily adjusted. Therefore, when the amount of water flowing into the flow channel R becomes a large flow rate, the magnetic body 26 is moved upward to weaken the repulsive force, and the pressing force of the valve body 23 against the inflow 1 m7F is weakened, thereby increasing the flow rate. can be guided into the passageway R. For example, as shown in FIG. 5, if the magnetic body 26 is provided with a rotating shaft 26a and has a structure in which the magnetic pole direction can be reversed from the outside with a screwdriver, etc., the S and N poles can be reversed, and the magnetic It is also possible to completely open the inlet P by magnetically attaching the valve body 23 to the body 26, and the check function can be canceled as necessary. In addition, on the contrary, the magnetic body 26 is extremely lowered to remove the valve body 23.
It is also possible to firmly press the inflow port P against the inflow port P to completely close the inflow port P, and in this case, it is possible to provide the function as a water stop valve.

In order to increase the biasing force of the valve body 53 using the conventional spring 52, from the formula F=Kx (K is the spring constant and X is the amount of displacement from the natural length of the spring), a corresponding amount is required. Although it is necessary to displace the spring, when a magnetic body is used as in this example, by changing the distance between the magnetic bodies 24 and 26, a repulsive force corresponding to the square ratio of the distance can be obtained. By slightly adjusting the position of the magnetic body 26, an extremely strong repulsive force can be applied to the valve body 23, and the closing force of the valve body 23 with respect to the inlet P can be easily and reliably adjusted.

FIG. 6 shows a fourth embodiment.

That is, in this example, the holding member 27 containing the magnetic material
A strainer is formed with a guide groove 27a and a convex portion 27b on the side, and a mesh or the like is formed around the convex portion 27b.
28 is wound around the strainer 28, and a valve body 23 is disposed on the inner peripheral side of the lower part of the strainer 28.

With this configuration, the strainer 28 removes magnetic debris flowing through the water passage R, effectively preventing magnetic debris from entering the guide groove 7a, etc., and ensuring durability of operation. can do.

(Effects of the Invention) The check valve of the present invention has a magnetic body attached to the valve body, and a magnetic body is also provided to the holding member, so that the valve body cannot be energized as in the conventional case. This eliminates the need for a spring, making it easy to assemble the check valve, and by slightly adjusting the position of the magnetic material within the holding member, the biasing force on the valve body can be easily adjusted. It has the effect that the function as a check valve can be improved and the function as a water stop valve can be added.

[Brief explanation of drawings]

The figures show embodiments of the present invention; Fig. 1 is a partial cross-sectional configuration diagram of the check valve of the first embodiment installed in a mixing faucet; and Fig. 2 shows the check valve of Fig. 1. An enlarged view, FIG. 3 is a schematic diagram of the check valve of the second embodiment, FIG. 4 is a schematic diagram of the check valve of the third embodiment, and FIG. 5 is a perspective diagram of an example of the magnetic material. , FIG. 6 is a schematic diagram of a check valve according to a fourth embodiment, and FIG. 7 is a schematic diagram of a conventional check valve. 10... Check valve 11... Valve body 11a...
Sliding shaft portion 12... Holding member 12a... Guide groove 14.15... Permanent magnet 21... Holding side magnetic body 22... Resin coating portion 23... Valve body 23
a... Shaft portion 24... Permanent magnet 25... Resin case body 26... Magnetic body 26a... Rotating shaft portion 27... Holding member 28... Strainer-R
...Waterway

Claims (1)

[Claims] A check valve capable of preventing backflow by opening and closing a valve body movably held by a holding member, wherein the valve body is provided with a magnetic material, and the holding member is also provided with a magnetic material. A check valve characterized by: