JPH0336600Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention a. Industrial application field This invention relates to a gasket that improves the waterproofing effect of water leakage during opening and closing of a drain valve, so-called intermediate leakage, and has improved strength and durability. It is something.

b. Prior art and its problems As shown in FIG.
Further, a lower valve body 1C is connected to the lower part of the valve body 1A, and a piston part 1D is inserted into the valve body 1A so as to be movable up and down by a rod 1E. A set screw 1Q is connected from below, rubber bands 1F are arranged at the upper and lower parts of the piston part 1D, a valve rubber 1G is arranged near the lower end of the piston part, and the valve rubber set screw 1Q has water leakage prevention ring packing 1H
is installed. In the figure, 11 is the water supply port, 1J is the drain port, 1K is the water stop bulb, 1L is the valve body packing, 1
M is an inlet.

Water is stopped by the drain valve by closing the valve seat 1N with a valve rubber 1G.

In a conventional drain valve, the part that touches the communication port 10 is
As shown in Figure 2, a leak-proof ring packing 1H was used, but it was easily damaged due to the large resistance due to the compression of water when the stopper was closed.
As shown in the figure, the gasket 1H was turned up by the water pressure and sometimes broke due to friction with the communication port 10. Therefore, the life of the leakage prevention ring packing 1H was short.

In addition, as shown in Figure 3, a method of using a grooved ring 1P made of synthetic resin to release water resistance was also adopted, but if the user did not close the stopper completely,
This resulted in a drawback that water leakage occurred at intermediate points.

Intermediate water leakage is water leakage that occurs when the stopper is not completely closed (or opened), and when the stopper is completely closed and the valve rubber 1G is in close contact with the valve seat 1N, as shown in Figure 5, As shown in Fig. 6, when the valve has been opened to some extent and the rubber band 1F is in close contact with the inside of the valve body 1A, the water entering from the inlet will be transferred to the valve rubber 1G and the valve body 1A in Fig. 5, as shown by a. In Figure 6, the drain hole 1D1 of the piston 1D is blocked by the rubber band 1F.
Water leakage does not occur because water cannot reach this level. However, the eighth
In the state shown in the figure, water flows as shown by the arrow a, passes through the communication port 10, reaches the upper part, and flows as shown by a' and a''.
Water is flowing out from J, which means there is a water leak. This is an intermediate water leak.

The present invention aims to provide a package for eliminating the above-mentioned drawbacks.

B. Structure of the invention a Means for solving the problem The present application attempts to solve the above-mentioned problem with the following structure. That is, the present invention is a two-stage seal for a drain faucet that has a two-stage ring portion to enhance the waterproofing effect of intermediate water leakage in the faucet, and is also integrated with a valve rubber to improve strength and durability.

b. Example 2 of the invention is a drain valve of the present invention which is equipped with a two-stage gasket. And its composition is the 12th
As shown in the figure, an outer tube 2B is connected to the upper part of the vertically cylindrical valve body 2A, and a lower part of the valve body 2C is connected to the lower part of the valve body 2A. A valve rubber set screw 2Q is freely inserted into the piston portion 2D, and a valve rubber set screw 2Q is connected from below to the lower end of the piston portion 2D. Rubber bands 2F are provided at the upper and lower portions of the piston portion 2D, and a A two-stage gasket 2G is attached to the vicinity and the outer periphery of the valve rubber set screw 2Q.

As shown in FIG. 10, this two-stage packing 2G has a valve rubber portion 2G on the upper outer periphery of the cylindrical body portion 2G1.
2 is formed, and a lower first stage ring part 2G3 and an upper second stage ring part 2 are formed on the lower outer periphery.
G4 is formed, and the body portion 2G1, the valve rubber portion 2G2, and both ring portions 2G3 and 2G4 are integrally molded.

In this case, the valve rubber portion 2G2 corresponds to the valve rubber 1G, and both the ring portions 2G3,
2G4 corresponds to the water leakage prevention ring packing 1H.

In the figure, 2I is a water supply port, 2J is a drain port, 2K is a water stop bulb, 2L is a valve body packing, and 2M is an inlet.

Water is stopped using the drain valve by closing the valve seat 2N with a two-stage gasket 2G.

c. Effect Explain along with the effects.

C. Effect of the invention FIG. 11 is a cross-sectional view of the present invention, and when compared with FIG. 7, which is a cross-sectional view of a conventional packing, it can be seen that the height and thickness are increased.

This increases the strength, and since the entire two-stage packing takes care of the water resistance, the load is lighter and the durability is improved compared to conventional packing. Next, the state where the two-stage gasket is installed on the drain valve is shown. FIG. 13 is a diagram at the time when the stopper 2E is pushed down from the open state to start closing the stopper and drainage has started as shown by b. At this point, the first stage ring part 2G3 and the second stage ring part 2G4 of the second stage packing 2G are in contact with the inner wall of the valve body 2A, so if the first stage ring part 2G3 of the second stage packing 2G wears out and the water stops. Even if the effect deteriorates, water is reliably stopped by the second stage ring portion 2G4, and the effect of preventing intermediate water leakage is also improved.

As mentioned above, by using the two-stage packing of the present invention, not only does it enhance the effect of preventing intermediate water leakage, but also improves strength and durability, so the replacement period of the two-stage packing can be extended, resulting in economical effects. It also has

In the figure, a, a', and a'' indicate the flow of water entering from the inlet, and b indicates the flow of waste water when water is drained.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are vertical cross-sectional views of conventional drain plugs, Figures 4, 5, and 6 are partially enlarged views, and Figure 7 is a vertical cross-section of a conventional drain plug. Fig. 8 is a vertical cross-sectional view explaining the problems of the conventional one.
FIG. 9 is a perspective view of the two-stage packing in an inverted state, FIG. 10 is a front view of the two-stage packing, FIG. FIG. 13 is a vertical cross-sectional view of the drain valve equipped with the two-stage packing of the present invention, illustrating a state in which the rod is pushed down from the opened state to start closing and draining begins. 2... Drain valve equipped with the proposed two-stage gasket,
2G...Two-stage packkin.

Claims (1)

[Scope of utility model registration request] A two-stage gasket for a drain faucet, characterized in that the ring part is made into two stages in order to enhance the effect of preventing intermediate water leakage in the faucet, and is further integrated with valve rubber to improve strength and durability.