JPS6324319Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in draining water to prevent freezing in a hot/cold water mixing faucet and a connecting pipe as an accessory part of sanitary equipment.

Conventionally, the connection pipe used in cold regions that connects the hot water mixer tap and the water supply pipe is equipped with a water drain device to prevent connection, as shown in Figure 3 of the earlier application Publication No. 1983-27718 (the drawing of the present application). (Figure 5).

To briefly explain the above FIG.
1 is provided with a valve port 42 and a drain hole 43 diagonally downward, and a drain chamber 44 and a drain chamber 4 are provided at the extension lower part of the drain hole 43.
A valve portion 46 is provided with a threaded port 45 that communicates with the drain hole 43, and the threaded port 45 closes the drain hole 43 except when draining water.
A drain plug 47 is screwed in and has a drain hole 43a that communicates with the drain chamber 44 and drains residual water in the hot water and water mixing tap and flow path 41a to the outside when draining water.

In the case of the above, after opening the drain valve and draining water, leave your hands that have leaked into the residual water during the period (about 2 to 3 minutes) until the draining is finished to avoid the cold. Waiting during the increasing night hours was extremely painful work. In particular, this work is often done by children, so they often end up closing the drain valve at an appropriate time, which can result in residual water freezing the faucets or connecting pipes, or closing the drain valve. As a result of forgetting to do so, there was no end to the inconveniences, such as flooding indoors when the water was turned on the next morning.

This invention solves the above problem and places a push rod dynamically frictionally supported on a sleeve nut in a direction perpendicular to or abutting against the check valve. The purpose is to allow drainage to be carried out by simply pushing in the push rod when discharging water, and to gradually return the push rod to a standby position by water pressure when water is flowing.

The basic structure of this device is to have a valve mechanism on the top of the main body that freely supplies hot water at an appropriate temperature by operating a pair of ceramic plate valves via a single lever. In the middle of the water flow path of the hot water mixer faucet body, which has a hot water flow path and a water flow path, a valve port that is opened and closed with a check valve having an actuated head and a drainage chamber that communicates through the valve port is provided. A push rod having an operating head is supported through a sleeve nut in a screw hole provided in the drainage chamber, and the push rod maintains the correspondence between the packing wound around the circumferential surface and the inner circumferential surface of the through hole of the sleeve nut using dynamic friction. By interposing the push rod in a slidable manner, when the operating head of the push rod acts on the affected head of the check valve to perform drainage to prevent freezing, the push rod operates in one movement, and when water flows through the water flow path, the push rod operates in one motion. The push rod is designed to gradually return to the standby position due to the water pressure applied to the working head when water is flowing through the water flow path received by the working head.

Hereinafter, one embodiment of this invention will be described in detail based on the drawings.

In this embodiment, as shown in FIGS. 1 and 2, the main body 1 of the hot water mixer faucet has a water flow path 3 and a hot water flow path 4 that lead to a water supply source and a hot water source via connecting pipes 2 and 2a on both sides. A drainage chamber 7 separated by a partition wall 6 having a valve port 5 on the same axis as the connecting pipe 2 is disposed in the middle of the water flow path 3, and on one side of the drainage chamber 7, A threaded opening 8 communicating with the outside is provided to attach a sleeve nut 9, and a through hole 10 of the sleeve nut 9 is provided with a working head 11 having a substantially truncated conical shape at one end and a packing 13 in an annular groove 12 on the circumferential surface. This push rod 1 is interposed with a push rod 14 wound with
4 is slidable due to dynamic friction due to the inner circumferential surface of the through hole 10 and the packing 13 that is in contact with the inner circumferential surface. A plug 17 having a shaft hole 15 and a spring seat 16 is attached to a screw hole 8a opened concentrically with the valve port 5, and a check valve 18 is supported through the shaft hole 15. An actuated head 19 that engages the operating head 11 during draining is protrudingly provided on the surface facing the opening 5, and a spring 20 is elastically loaded between the spring seat 16 and the check valve 18 to form a draining mechanism 21. Configure. The shaft hole 15a is provided vertically through the center of the main body 1, and a chamber 2 containing a valve function section 22 (to be described later) is provided in the shaft hole 15a.
3 and the mixing chamber 24 are provided above and below the machine casing 25. A shaft 26 is inserted vertically into the bottom surface of the machine casing 25, and a nut 28 is attached to the threaded part 27 at the lower end of the shaft 26 to connect the main body 1 and the machine casing 25. By integrally connecting the machine casing 2
The water supply chamber 29 in 5 and the water flow path 3 are connected to the water supply chamber 29
A hot water supply room 30 attached to the hot water supply room 30 and the hot water flow path 4 are communicated with each other. This water supply room 29 and hot water supply room 3
0 is the chamber 23a of the plate valve 31 whose upper part is movable.
This plate valve 31 is connected to a lever 33 via a machine casing 25a and an operating shaft 32 which are integrally assembled on the upper part, and by operating the lever 33 in the valve opening direction, The chamber 23a of the plate valve 31 and the port 34 of the fixed side plate valve 31a communicate with each other, and the same amount of hot water and water are supplied to the mixing chamber 24 through a discharge pipe 35 communicating with the mixing chamber 24. It is configured to supply hot water at an appropriate temperature to the outside. Note that the discharge pipe 35 is provided with a drain plug 50. Figure 3B to Figure 4B,
The drainage mechanism 21a shown in FIG. 9a, and the push rod 14a has a check valve 18a having a plurality of ribs 49 at its inner end, which corresponds to the butt shape in the axial direction. The one shown in FIG. 4A is equipped with the drainage mechanism 21 in the water flow path 3a of the connecting pipe 2b that connects the water supply pipe and the main body of the hot water mixing faucet.
Also shown in B is the water flow path 3a of the connecting pipe 2b.
It is equipped with a drainage mechanism 21a.

Now, in order to perform freezing prevention drainage, the main valve of the water pipe has been shut off and the drainage mechanism 21 has been changed to the water stop valve shown in Fig. 1, and then we will explain how to perform freezing prevention drainage. When the push rod 14 is pushed in the direction of arrow F, the push rod 14 is pushed all at once to the position shown in FIG. Moving. In this case, since the operating head 11 of the push rod 14 moves together, the operating head 11 pushes up the waiting check valve 18 while engaging with the operated head 19 on the lower surface of the check valve 18 in the advancing direction. Due to this operation, the check valve 18 integrated with the operated head 19 is lifted and the valve port 5 is opened, so that the remaining water in the flow path 3 is discharged to the water pipe through the reverse route when water is passed. At the same time, since the normal drainage hole provided in the main valve is opened at the same time as the main valve is closed, this remaining water directly flows out through the drain hole. If the pressing rod 14 is left in the state of being pushed inside the through hole 10, drainage will be completed over time.

In order to use the water supply that has been prevented from freezing by the above-mentioned drainage the next morning, open the main valve and let the water flow as usual, and the water flowing through the water flow path 3 will flow into the drainage chamber 7 in Figure 3 A. The water pressure during reaching the drain chamber 7 and passing through the drainage chamber 7 is applied to the push rod 14 and the working head 11, and this water pressure overcomes the frictional force between the packing 13 of the push rod 14 and the inner wall surface of the through hole 10 of the sleeve nut 9. The push rod 14 is gradually pushed back in the opposite direction of the arrow F and automatically returns to the starting position shown in FIG. 1, and the above operation is repeated to perform anti-freeze drainage. Note that, at the same time as draining water from the water flow path 3, water is also drained from the discharge pipe 35 using the drain plug 50. It is also assumed that the drainage mechanisms 21 and 21a of the other embodiments operate in the same manner as described above.

Since this invention has the above configuration, it has the following advantages.

(1) A push rod with an operating head and a check valve with an actuated head are attached to the main body of the hot water mixing faucet and the water flow path of the connecting pipe that connects the main body to the water pipe, thereby preventing freezing. When draining water, the sleeve nut is pushed into the through hole in one motion of the push rod, thereby ensuring that the water flow path is drained.

(2) The push rod slidably inserted into the through hole of the sleeve nut is in contact with the inner circumferential surface of the through hole of the sleeve nut due to the elasticity of the packing wound around the annular groove on the circumference, so the push rod In response to external pressure applied to it, it is pushed in in one motion, but when it receives water pressure, it is able to automatically return to its starting position, albeit very slowly.

(3) Compared to conventional models, there are no inconveniences such as getting your hands in the water when draining water, having to wait until the drain is finished, or forgetting to close the drain valve after draining, leaving the room flooded with water. The effect of being able to eliminate all of them is great.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway and partially omitted front view of the hot water mixing faucet body with the present invention installed, and Fig. 2 is a partially omitted vertical sectional side view taken along line X-X in Fig. 1. Figure 3 A is an explanatory diagram of the drainage procedure, and Figures 3 B to 4 are
Figures A and B are explanatory diagrams of another embodiment, and Fig. 5 is an explanatory diagram of the prior art. Explanation of symbols of main parts, 1...Main body, 2b...
Connecting pipe, 3, 3a...Water flow path, 5, 5a...Valve port, 7...Drainage chamber, 8a...Threaded port, 9, 9a...
Sleeve nut, 10... Through hole, 11... Working head, 13, 13a... Packing, 14, 14a
... Push rod, 18, 18a ... Check valve, 19 ... Worked head, 20 ... Spring, 31, 31a ...
Plate valve, 33... lever, 36... valve cylinder, 37...
Diaphragm, 38... pressure chamber, 39... pore.

Claims (1)

[Claims for Utility Model Registration] (1) The main body of a hot water mixer faucet that has a pair of plate valves made of ceramics and that is configured to supply hot water at an appropriate temperature through a single lever. A connecting pipe having a water flow path leading to a water supply source is provided on one side of the main body, and a valve opening with a check valve that opens and closes in the middle of the water flow path, and a drainage pipe leading through the valve opening. A chamber is provided, a push rod is supported in the drainage chamber via a sleeve nut, and the push rod is dynamically slidably inserted into the through hole of the sleeve nut via packing on the circumference, and the working head of the push rod is and the operated head of the check valve in a freely engaging and detachable manner; A water drain device for faucets, which is characterized by gradually returning to a standby position. (2) A pressure chamber, a valve cylinder with a valve port and a screw port on both ends.
By attaching a sleeve nut with air holes and a through hole, and forcing the push rod inserted through the through hole toward the valve port side by the diaphragm, the push rod and the check valve can be elastically moved in the direction of abutment on the same axis. 2. A water draining device for faucets according to claim 1, which is characterized by having a balance of: (3) A utility model characterized in that a drainage mechanism in which a push rod and a check valve can be freely engaged and detached in a right angle direction is installed in the middle of a water flow path formed in the same shape of a connecting pipe formed in an approximately Z shape. A water draining device for faucets as claimed in claim 1. (4) In the middle of the almost Z-shaped water flow path, the working head of the push rod and the receiving head of the check valve are aligned on the same axis, and the working heads of each other are elastically balanced between the diaphragm and the spring to prevent water flow. 2. A water draining device for faucets according to claim 1, characterized in that a draining mechanism is provided that can freely move forward and backward in an axial direction perpendicular to a road.