JPS645162Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of use: This invention can be used as a general water tap during normal times, but even if there is a sudden drop in temperature in winter, water pipes and equipment will not be damaged due to freezing. This invention relates to a valve structure for a faucet that automatically opens to allow tap water to flow and prevent freezing.

Conventional technology: As is well known, in areas such as Hokkaido where the water in water pipes often freezes during the winter, as a countermeasure, water drain valves are used to drain the water in the pipes and drain them underground before going to bed. Make sure that no water remains in the water pipes. However, in regions that are relatively warm even in the winter, the measures taken in cold regions are generally not taken, so if the temperature suddenly changes and the temperature drops, the water in the water pipes will freeze, causing the volume to drop. Expansion can damage the tube, and if the temperature is subject to rapid fluctuations or unexpectedly low temperatures persist due to unfavorable weather conditions,
Water pipes are poorly maintained during the winter, often causing damage to equipment directly connected to the water pipes, which can require large amounts of money to repair. However, in areas where such accidents are likely to occur, it is not easy to install the same equipment as in cold regions, so regular water faucets are used, and unless special equipment is used, it is difficult to install the same equipment as in cold regions. Currently, there are no measures in place to protect against freezing.

Purpose of the invention: This invention solves the conventional problems in view of the above situation, and can be used as a regular water faucet (generally called a water faucet) in warm regions. In addition, it can be used to prevent tap water from freezing even when the temperature drops in winter, and when the water in the pipes expands in volume, it automatically closes and allows the water to flow, preventing the pipes from freezing. The purpose of this project is to propose a valve structure for a water faucet that has functions.

Structure of the invention: In order to achieve the above object, in the present invention, the outer periphery of the circular seat that abuts the valve seat ring formed protruding above the partition wall water passage hole of the faucet body in the valve of the water faucet,
The packing holding surface has a diameter slightly larger than that of the valve seat ring, and a part of the packing holding surface is formed into an arcuate surface, and an O-ring packing is fitted onto this packing holding surface. A slope is provided, and a water passage groove is carved in the circular seat surface, and an O-ring packing is formed around the valve seat ring with the circular seat surface in contact with the valve seat ring. If the valve freezes in the closed state, the gasket attached to the valve will come undone due to volume expansion in the pipe leading to the hydrant and the water pressure acting on the valve closing part. It was made to be able to prevent freezing by being pushed outward and displaced, allowing water to flow when the valve was closed.

Embodiment: Next, the valve structure of the present invention will be described in detail with reference to embodiment diagrams. In Figures 1 and 2,
1 is the faucet body, 2 is the bonnet cover, and 3 is the gland packing. Reference numeral 4 is a valve stem, the lower part of which (in the drawing) is a valve operating part 4' that is screwed into the opening/closing adjustment screw part 5 provided on the inner circumference of the bonnet cover 2, and a valve operating part 4' is inserted into the center from below. A valve rod insertion hole 4'' is drilled. 6 is a handle attached to the upper end of the valve rod 4, and 7 is a gland packing holder. 1'
is a partition wall that partitions the inside of the faucet main body 1 into a water supply chamber 8 side and an outlet chamber 8' side, and 9 is a water passage hole.

Therefore, Benko 10 (generally called Koma)
consists of 11 parts of the valve body in the form of a disc with the required dimensions;
At the center of the upper surface is a valve rod 12 that can be loosely inserted into the insertion hole 4'' of the valve operating portion 4' of the valve stem 4 with an appropriate length.
and an O-ring packing 18, and the valve body 11 and the valve rod 12 are integrated into one body.
The lower half of the faucet body 1 has a circular seat that abuts against a valve seat ring 20 that protrudes in a narrow annular shape at an appropriate height (preferably as low as possible) around the periphery of the water passage hole 9 on the upper surface of the partition wall 1' of the faucet body 1. 13, and a packing retaining surface 15 having a protruding edge 14 around the valve seat ring 20 so as to cover the valve seat ring 20 without contacting it as shown in FIG. Furthermore, a connecting portion between the outer periphery 11' of the valve body 11 and the packing holding surface 15 is formed as a slope 16, and the connecting portion between the outer periphery 11' of the valve body 11 and the packing holding surface 15 is formed as a slope 16. The ridge line 17 is formed to have a diameter slightly larger than the center circle of the O-ring packing 18. A water passage groove 13 is carved in the shape of a cross (but not limited to this) on the surface of the circular seat 13. Note that when the O-ring packing 18 is attached to the valve 10, its lower end surface is in the natural state at the edge 14 that protrudes around the circular seat 13.
The valve seat surface 21 on the upper surface of the partition wall 1' is positioned below (in the drawing) the end surface of the partition wall 1' and is formed around the valve seat ring 20 with the circular seat 13 in contact with the valve seat ring 20. The O-ring packing 18 is brought into contact with and deformed for sealing (see Fig. 2).

According to the present invention configured in this manner, when used as a normal water faucet, the valve stem 4 is rotated by operating the handle 6 to open or close the faucet, just like a normal faucet. When the faucet is closed, the O-ring packing 18 attached to the valve element 10 comes into contact with the valve seat surface 21 to close the water passage hole 9. At this time, the circular seat 13 of the valve element 10 abuts against the valve seat ring 20 of the water faucet body 1, restricting the closing conditions, and the O-ring packing 18 and the valve seat surface 21
The contact pressure between the valve 10 and the O-ring 11 is kept in a suitable state for sealing (so that the contact surface and elasticity can be generated to withstand the water pressure without excessive deformation of the cross section of the ring).
The gasket retaining surface 15 and the outer peripheral surface of the protruding edge portion 14 connected thereto are fitted in a slightly expanded state when installed, and are tightly held in place by the elastic force of the O-ring packing. The gasket does not come off when opened or closed, just like a normal gasket. In fact, since the gasket is not overly tight, it can be used for a long time without leaking.

If the water in the water pipe approaches a frozen state due to a drop in temperature during the winter when the tap is closed, the water in the water pipe freezes in the branch pipe from the underground main water supply pipe to the ground due to volumetric expansion. Water supply chamber 8 of the hydrant
The pressure of the water accumulated in the interior will be pressurized above the normal level, and due to this pressure, a circular seat 13 will be carved on the inside of the O-ring gasket 18 attached to the valve 10, which had been kept in equilibrium until then. Pressure is transmitted through the water passage groove 13' of the O-ring gasket 1, which acts as a seal against the valve seat surface 21 with a slight contact force.
Since the outlet chamber side 8' is at atmospheric pressure, the O-ring packing 18, which has a circular cross section, is connected to the packing holding surface 15 of the valve 10. As the contact force of the ring packing 18 weakens, the entire ring appears to rotate inward, and the ridge line 17 connected to the outer end of the packing holding surface is slightly larger than the diameter of the cross-sectional center circle of the ring packing 18. Since it is about
It rolls toward the upward slope 16 formed on the outside of the ridge line 18 and climbs up, and the seal (indicated by chain line A) is opened and the water passage groove 13' of the circular seat 13 is opened from the water passage hole 9. The water flows through the outlet chamber 8' to the outlet chamber 8', and as a result, even though the tap is closed, it automatically becomes slightly free-flowing, allowing water to flow from the main pipe side of the water pipe toward the water tap. The parts that are close to freezing gradually return to their original state, preventing the tube from freezing.

Note that the O-ring packing 18 that has risen due to the above-mentioned operation is still fitted around the valve head 10 in that state, so after returning to its normal state, the valve stem 4 can be pulled up and the valve head removed. When 10 is in an open state, or by performing an operation to close the cap after it has been opened wide, the thing that expanded upon receiving an impact will return to its original position with its restoring force, and the cap can be closed in its original state. become.

Note that a plurality of protrusions protrude from the end surface of the portion of the bonnet cover 2 that is inserted into the plug body 1, and when the valve stem 4 is pulled up to the uppermost position, the valve element 10
By slightly contacting the O-ring gasket which is protruded to the outside and lifted up, the O-ring gasket can be restored to its original state by this protrusion.

Furthermore, in accordance with the spirit of the present invention, it is not limited to the above embodiments, and it is also possible to make partial changes to the O-ring packing holding part of the valve, and the shape of the faucet can also be made according to general standards. Needless to say, shapes other than molds can be employed.

Effects of the invention: As described above, according to the invention, it can be used in the same way as a general water faucet during normal times, and can be used in temperate regions (including similar regions) when temperatures suddenly drop during the winter. Also, by utilizing the increase in water pressure in the pipe due to volumetric expansion when water transforms into ice during freezing, the O-ring gasket, which is responsible for the sealing action, is displaced at the closed valve part, and the seal is automatically opened. By continuously discharging the water inside the pipe, it is possible to prevent freezing inside the pipe, and with a simple configuration, it automatically prevents damage to water pipes or pipes inside equipment directly connected to water supply. It has many advantages such as being able to maintain its sealing function even under normal conditions and withstanding long-term use without water leakage, so it can be said to have great practical effects.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention,
FIG. 1 is a longitudinal sectional view of the water tap, and FIG. 2 is an enlarged detailed view of the valve structure. 1... Water faucet body, 1'... Bulkhead, 4... Valve stem,
4'... Valve operation part, 8... Water supply chamber, 8'... Outlet chamber, 9... Water hole, 10... Valve, 11... Valve body, 12... Valve rod, 13 ...Enza, 13'...
... Water flow groove, 14 ... Protruding edge, 15 ... Packing holding surface, 16 ... Slope, 17 ... Ridge line, 18 ...
...O-ring packing, 20...Valve seat ring, 21...
Valve seat surface.

Claims (1)

[Scope of utility model registration request] A valve in a water faucet is such that the outer periphery of the circular seat that comes into contact with the valve seat ring that is formed protruding above the partition wall water passage hole of the faucet body has a slightly larger diameter than the valve seat ring and is partially formed into an arcuate surface. This packing holding surface is used as a packing holding surface, and an O-ring packing is fitted onto this packing holding surface, an inclined surface with an appropriate angle is provided on the upper outer periphery of the packing holding surface, and a plurality of water passage grooves are carved in the circular seating surface. and the O-ring packing contacts and seals the valve seat surface formed around the valve seat ring when the circular seat surface is in contact with the valve seat ring. The valve structure of the water faucet has antifreeze function.