JPH0510052Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention relates to antifreeze in a branch tap that supplies water in two directions.

(Prior Art) Conventionally, as a valve structure of this kind of anti-freeze plug, there is one shown in FIG. 1 of Utility Model Application No. 169170/1983 (FIG. 4 of the drawings of the present application).

To briefly explain Fig. 4 above, the valve box 4
0 is provided with an inflow port 41, an outflow port 42, and a drain port 43 in order from the top, and cylinders 44, 44a, and 44b are also provided inside from the top, and packing 45 corresponding to each of these cylinders 44, 44a, and 44b. , 45a on the circumferential surface, and a piston 47 having a check valve 46 at the lower end for opening and closing the inlet 41 and the outlet 42 is inserted vertically, and the air hole 48 penetrating the axial center of the piston 47 is inserted into the piston 47 vertically. It communicates with the open side of the cylinder 44 and the drain port 43 side, and when draining water to prevent freezing, the piston 4
7 and packing 4 of the check valve 46.
5b closes the cylinder 44a, the packing 45b separates from the cylinder 44b, and the outflow port 42 and the drain port 43 communicate with each other, and the internal negative pressure causes the ball valve 49 provided in the air hole 48 to
outside air is introduced by displacing the valve, and water is drained by breaking the vacuum near the water supply destination leading to the outlet 42 and the cylinder 44b of the valve box 40.

In the above case, since the check valve is only loosely fitted into the small diameter portion of the piston, if the piston is pulled up and the packing 45b is fitted into the cylinder 44a over time, the corresponding surface of both Since the cylinder 44a is frozen, there is an inconvenience in that the check valve cannot be lowered from the cylinder 44a even if only the piston is lowered during water flow the next morning.

(Problem to be solved by this invention) The problem to be solved by this invention is that during a long period of time until the next morning when water is being drained to prevent freezing, the inside of the branch tap, especially the valve grip, The purpose is to ensure that there is no problem with water flow even if the area around the cylinder or the check valve is slightly frozen due to a small amount of residual water.

(Means for solving the problem) The technical means taken by the present invention to solve the above problem is to open the first flow path and face the first valve seat hole corresponding to the check valve. The check valve is pressurized and retreated toward the valve gripping cylinder side of the second flow path via the push rod to open the first valve seat hole, and the second flow including the notch of the valve gripping cylinder is A water stop valve and a second valve seat hole that is opened and closed by the water stop valve are provided in the passage.

(Function) When draining water to prevent freezing, stop the main valve of the water supply source and screw in the knob of the push rod of the branch valve. By this operation, the check valve facing the push rod is removed from the first valve seat hole and the first valve is closed. The second flow path connecting the seat hole and the outlet is completely passed through, and outside air is introduced from the screw groove of the push rod and sleeve nut to break the vacuum inside the second flow path and the second pipe to drain water from the drain valve. Do this.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In the embodiment of this invention, as shown in FIGS. 1 and 2 A and B, a branch tap 1 has one end connected to a main tap (not shown) that communicates with a water supply source, and the other end connected to a main tap (not shown) that communicates with a water supply source. It is arranged in the middle of the first pipe 2 leading to the water supply equipment A, and the inlet 4 of this branch tap 1
A first flow path 6 is provided between the outlet port 5 and the first flow path 6, and a screw hole 8 is opened in the middle of the first flow path 6 facing the first valve seat hole 7, and a sleeve nut 9 is inserted into the screw hole 8. At the same time, the externally threaded part 13 of the push rod 12, which is separately provided and has an O-ring 11 attached to the ring groove 10 on the circumferential surface, is screwed into the threaded opening 8a of the sleeve nut 9.
2 is a check valve 14 (described later) which is activated by an operating head 12a by operating a knob C provided at the outer end in the screwing direction.
It is designed to move forward and backward as if pressing the button. The second flow path 15 passes through the first valve seat hole 7 and passes through the first valve seat hole 7.
One end communicates with the flow path 6, and the other end communicates with the outlet 5a leading to a second water supply facility B such as a flush toilet. Stop valve chamber 17 and female thread part 16
The water stop valve chambers 18 each having a different inner diameter are formed in a communicating manner, and the valve gripping cylinder 19 provided separately is
The second
Notches 20, 20 constituting a part of the flow path 15 are provided, and an insertion hole 21 for supporting the check valve 14 and a male screw portion 13b for screwing with the water stop valve 22 are provided on both end faces, respectively. A spring 23 is elastically loaded between the check valve 14 and the end face of the valve grip cylinder 19,
The packing D of the check valve 14 corresponds to the first valve seat hole 7. The water stop valve 22 has the female threaded portion 1
6a, and when the packing _D1 on the end face of the water stop valve 22 comes into contact with the second valve seat hole 27 of the water stop valve chamber 18 by screwing the water stop valve 22, the second The water supply to water supply facility B is stopped. By interposing a cylindrical strainer 29 between the concave seat 28 of the plug 25 and the second valve seat hole 27, the check valve chamber 17 and the check valve chamber 17 and the notch are interposed. 20, 20 is adapted to trap foreign matter in the fluid that reaches the water stop valve chamber 18 through the second flow path 15. The second pipe 3 has one end communicating with the outlet 5a and the other end communicating with the second water supply facility B via a pipe joint 26, and the pipe joint 26 has a water hole 31 for water. A plug 30 is attached.

Now, to explain the case of draining the water in order to prevent the residual water in the branch valve 1 and the first pipe 2 from freezing when not in use at night, first turn off the main valve of the water supply source, and then When the knob C of the branch stopper 1 shown in A is operated in the screwing direction, the push rod 12
The operating head 12a of moves to the position shown in FIG.
A check valve 14 waiting in the direction of movement of the operating head 12a
is pressed against the elasticity of the spring 23 to open the first valve seat hole 7. Due to this movement of the push rod 12, the O-ring 11 escapes from the threaded opening 8 of the sleeve nut 9 to the first flow path 6.
Outside air is introduced into the first flow path 6 from a, and the first valve seat hole 7 is opened to break the vacuum inside the branch plug 1, and the first pipe 2, the first flow path 6, and the second flow path 15
The remaining water inside reaches the water stop valve chamber 18 through the notches 20, 20 of the valve grip cylinder 19 interposed in the second flow path 15, and flows through the outlet 5a communicating with the water stop valve chamber 18.
The water is removed from a water hole 31 of a drain plug 30 which is provided in the second pipe 3 communicating with this and is opened in advance.

After draining the water as described above, close the drain valve 30 and return the knob C to the position shown in FIG. 2A.

Next, strainer 2 is installed immediately after construction or due to long-term use.
If the check valve 9 becomes clogged, operating the water stop valve 22 in the screwing direction with a hand tool will clear the check valve 1.
The packing D1 of the water stop valve ₂₂ , which is further pressed, is in close contact with the first valve seat hole 7.
It comes into contact with the valve seat hole 27 and closes it, thereby blocking water flow to the second flow path 15. Continue to insert the plug 25 into the female threaded part 16.
When the strainer 29 is removed from a, the strainer 29 is pulled out together with the strainer 29, and the strainer 29 is washed with water or compressed air to remove clogging foreign matter, and once clean, it is restored and used for the next use.

(Effects) Since this invention is configured as described above, it has the following advantages.

(1) We installed a water draining knob with a push rod on the branch valve so that when draining water, the check valve is pressed to open the first valve seat hole, so when draining water to prevent freezing, screw the knob. By simply operating the check valve in the direction of
By introducing outside air through the threaded opening of the sleeve nut, the vacuum inside the branch valve can be broken, and all remaining water in the first pipe, the branch valve, and the second pipe can be completely discharged to the outside from the drain valve of the second pipe. In addition, it is possible to reliably prevent the check valve from freezing in the first valve seat hole during a long period of time in the draining state.

(2) Compared to conventional ones, the second flow path of the branch plug has
In addition to providing a first valve seat hole that corresponds to the check valve and a second valve seat hole that corresponds to the water stop valve, both valve seat holes can be opened and closed simultaneously by simply operating the water stop valve. By always maintaining a favorable state, the effect of increasing the efficiency of capturing foreign matter is significant.

[Brief explanation of the drawing]

Figure 1 is a front view of the proposed branch tap, Figure 2 A is:
Fig. 1 is a side sectional view taken along line X-X, B is an enlarged sectional view taken along line Y-Y in It is an explanatory diagram. Explanation of the symbols of the main parts, 1... Branch plug, 2...
First pipe, 3... Second pipe, 4... Inflow port, 5,
5a... Outlet, 6... First flow path, 7... First valve seat hole, 12... Push rod, 14... Check valve, 15...
Second flow path, 19...valve grip cylinder, 20...notch,
22...Water stop valve, 27...Second valve seat hole, 30...
Water drain valve, A...first water supply equipment, B...second water supply equipment.

Claims (1)

[Scope of utility model registration request] A branch plug 1 having an inlet 4 communicating with a water supply source and outlet ports 5, 5a communicating with a first water supply equipment A and a second water supply equipment B is provided and arranged on the first pipe 2, and the outlet 5a is disposed on the first pipe 2. , a second pipe 3 having a drain plug 30
The second water supply equipment B is connected to the first flow path 6 provided between the inlet 4 and the outlet 5 through a check valve 14, and the check valve 14 is pressurized only when draining water. The push rods 12 are arranged facing each other, and the check valve 14 is
A valve gripping cylinder 19 having a notch 20 and a second valve gripping cylinder 19 connected to the valve gripping cylinder 19 are connected to the second flow path 15 between the first valve seat hole 7 and the outlet port 5a.
An anti-freeze device for a branch faucet, characterized in that a water stop valve 22 for opening and closing 7 is interposed.