JPS638356B2 - - Google Patents

Description

[Detailed Description of the Invention] Similar to the relationship between an outlet installed in indoor wiring for household electricity and the plug of an electric appliance, a liquid outlet is provided in the middle of a hot water circulation path for heating connected to a boiler, and 2. Description of the Related Art A heat radiator is known in which the plug of the radiator can be easily attached and removed so that the radiator can be easily carried and used in a desired room.

The present invention provides a liquid supply/drainage pipe connection device that can removably connect such heating (or cooling) hot water (or refrigerant) circulation path and each radiator, etc., and prevents freezing. It is related to.

In conventional pipe connection devices of this kind, in order to prevent the plug from coming out when inserted into an outlet, it is necessary to operate a locking lever, or to connect the liquid supply pipe and drain pipe on the outlet side to the plug side. The operation was complicated, as it was necessary to turn a valve opening/closing knob provided on the outlet in order to establish conduction to the liquid supply hole and the liquid drain hole, respectively.

Furthermore, in the conventional type, if the plug is accidentally removed from the outlet while the valve is open, there is a risk that fluid may leak out from the outlet.

In the present invention, by inserting the plug into the outlet,
Simply turning the plug in the required direction will ensure that the plug is not removed from the outlet, and the valves on the outlet and plug sides will open, and simply rotating the plug in the opposite direction will easily remove the plug from the outlet. By making sure that the valves on the outlet side and the plug side are closed when the plug is removed from the outlet, the complicated operation and the risk of fluid leakage are avoided. The purpose of this invention is to provide a fluid supply/drainage pipe connection device which eliminates such concerns and prevents freezing even in extremely cold weather, and will be described below based on embodiments shown in the accompanying drawings.

1 is a liquid outlet (hereinafter referred to as an outlet)
Then, on the walls of each room where you plan to use the radiator,
It is fixed so that the opening is exposed.

The outlet 1 is open at the front end and closed at the rear end, and has a liquid supply hole 2 on the outer periphery near the rear end.
and a drain hole 3 are provided with a generally cylindrical main body 4 formed so as to be vertically opposed to each other.

The liquid supply hole 2 and the liquid drain hole 3 are respectively connected to a liquid supply pipe and a liquid drain pipe (not shown) in a hot water circulation path connected to a boiler (not shown).

Valve seats 5 and 6 are fitted into the front end opening edges of the liquid supply hole 2 and the liquid drain hole 3 in the main body 4, respectively, and a spherical main body is provided in the space inside the main body 4 between the valve seats 5 and 6. A valve body 7 is fitted into the main body 4 so as to be rotatable around the central axis.

A cylindrical connecting body 8 is integrally formed at the front end of the main valve body 7, and at the front end of this connecting body 8,
From the front, O-rings 9, 9 are arranged axially symmetrically on the left and right, facing the axial direction, and on the inner surface.
Two connection holes 10 and 11 are bored.

At the rear end of each connection hole 10, 11, a hole is formed coaxially with the connection hole 10, 11, has a slightly small diameter, and reaches near the rear end of the main valve body 7, and then bends outward at a right angle from there.
A first valve hole 12 and a second valve hole 13, which open on the outer peripheral surface of the main valve body 7, are connected to each other.

Further, the main valve body 7 is provided with a comparatively narrow vertical passage hole 14 passing through the center between the valve holes 12 and 13.

Thus, when the plug 17 described later is not inserted into the liquid outlet 1, the through hole 14
is facing in the vertical direction, and this through hole 14 allows
The liquid supply hole 2 and the liquid drain hole 3 are communicated with each other by inserting a plug 17 into the liquid outlet 1 and rotating the main valve body 7 together with the plug 17 by about 90 degrees clockwise in FIG. Sometimes, the liquid supply hole 2 communicates with the first valve hole 12 and the liquid drain hole 3 communicates with the second valve hole 13, respectively.

On the rear end surface of each valve hole 12, 13, there is a push rod 15, 15 whose front end extends to the middle part of the connection hole 10, 11 through the center of the valve hole 12, 13 and the connection hole 10, 11, respectively. The ends are fastened.

A generally annular engagement plate 16 is fixed to the front end of the main body 4 and has inward protrusions 16a and 16b on its inner edge that protrude into the opening from above and below.

The width of the upper protruding piece 16a is slightly shorter than the width of the lower protruding piece 16b.

The front end of the plug 17 is connected to the main body 4 of the outlet 1.
A cylindrical plug body 1 with an outer diameter approximately equal to the inner diameter of
It has become 8.

Approximately hook-shaped engagement grooves 19 and 20 are formed on the outer circumferential surface of the plug body 18 and extend axially rearward from the front end of the plug body 18 and then circumferentially in the vicinity of the rear end of the plug body 18. It is cut symmetrically around the axis of.

That is, each engagement groove 19, 20 is a long groove 1 in the axial direction extending from the front end of the plug body 18 to the vicinity of the rear end.
9a, 20a, and a circumferential groove 19 having a narrow width in the axial direction and extending in the circumferential direction of the plug body 18 from the rear end.
b, 20b, and short grooves 19c, 20c which are slightly wide in the axial direction and extend circumferentially from the side ends thereof.

The circumferential width of the long groove 19a and the short groove 19c in one engagement groove 19 is slightly smaller than the width of one protrusion 16a of the engagement plate 16, and the circumferential groove 1
The width of 9b in the axial direction is slightly smaller than the thickness of protrusion 16a.

The circumferential width of the long groove 20a and the short groove 20c in the other engagement groove 20 is slightly smaller than the width of the other protruding piece 16b of the engagement plate 16, and the circumferential groove 2
The width of 0b in the axial direction is slightly smaller than the thickness of protruding piece 16b.

Long grooves 19a, 20a and short grooves 19c, 20c
The mutual angular distance between them is approximately 90°.

Thus, the engagement plate 1 is attached to each long groove 19a, 20a.
The plug body 18 is attached to the body 4 of the outlet 1 so that the protrusions 16a and 16b in the outlet 1 fit together, respectively.
After fitting the plug body 18 into the opening and rotating it approximately 90 degrees, when the plug body 18 is slightly pulled out from the body 4, each protrusion 1
6a and 16b are engaged with the short grooves 19c and 20c, and the plug body 18 is prevented from coming off from the body 4.

At the front end of the plug body 18, a pair of left and right cylindrical protrusions 21 and 22 facing in the axial direction are connected.

Inside each of the projecting tubes 21 and 22, there is a diameter reducing hole 23 at the front end.
a, 24a and the subsequent tapered valve hole 23
A liquid supply hole 23 and a liquid drain hole 24 having b, 24b
is drilled.

The rear ends of the liquid supply hole 23 and the liquid drain hole 24 are open at the rear end of the plug body 18, and a cap 2 for connecting the flexible hoses 25 and 26 is provided at the opening edge.
7 and 28 are screwed on.

Sub-valve bodies 29 and 30 are provided in the liquid supply hole 23 and the liquid drain hole 24, respectively.

Each sub-valve body 29, 30 has a back surface and a base 2.
A conical coil spring 3 compressed in each liquid supply hole 23 and liquid drain hole 24 between the end faces of 7 and 28.
1 and 32, respectively, the tapered valve hole 23
b, 24b.

Flexible hose 2 fitted to caps 27 and 28
5 and 26 are connected to equipment using hot water such as a radiator (not shown).

A cylindrical cover 33 is fixed to the rear end of the plug body 18 and covers the connection portion between the plug body 18 and the flexible hoses 25 and 26.

Next, the operation and handling of the device of the present invention will be explained.

When the liquid outlet 1 and the plug 17 are disconnected from each other, the through hole 14 of the main valve body 7 faces in the vertical direction, as shown in FIGS. The hot water that has been poured is through hole 1.
4 and flows little by little to the drain hole 3. This prevents the liquid outlet 1 from freezing during severe winters.

Also, plug 1 removed from liquid outlet 1
7, valve bodies 29 and 30 biased forward by springs 31 and 32 close tapered valve holes 23b and 24b, respectively, and the hose 2
The fluid inside the tubes 5 and 26 will not leak.

The plug body 18 is connected to the outlet so that the protruding tubes 21 and 22 fit into the connection holes 10 and 11, and the protruding pieces 16a and 16b of the engagement plate 16 engage with the long grooves 19a and 20a of the engagement grooves 19 and 20. When inserted into the main body 4 of 1, the auxiliary valve bodies 29, 30 are pushed open by the push rods 15, 15 in a direction away from the tapered valve holes 23b, 24b against the urging force of the springs 31, 32. . Therefore, the valve hole 12 and the liquid supply hole 2
3, and the valve hole 13 and drain hole 24 communicate with each other.

After that, the projecting pieces 16a, 16b are connected to the circumferential groove 19b,
When the plug body 18 is rotated approximately 90 degrees to pass through the inside of the valve hole 12, the liquid supply hole 2, and the valve hole 1.
3 and the drain hole 3 communicate with each other.

Then, when you release your hand from the plug body 18, the reaction force of the springs 31, 32 against the auxiliary valve bodies 29, 30 that are in contact with the push rods 15, 15 causes the plug body 18 to be slightly separated from the body 4, and each Projection piece 16
a, 16b are the short grooves 19c, 2 of the engagement grooves 19, 20
0a, the plug body 18 is connected to the body 4
(This state is shown in FIG. 6).

In this state, hot water sent from the boiler (not shown) passes through the liquid supply hole 2, valve hole 12, liquid supply hole 23, and flexible hose 25, and is sent to the radiator etc. The used hot water is returned to the boiler through the flexible hose 26, drain hole 24, valve hole 13, and drain hole 3.

When removing the plug 17 from the outlet 1,
Once the plug body 18 is pushed toward the outlet 1, the plug body 18 may be rotated approximately 90 degrees in the opposite direction to that described above and then pulled out.

Along with this rotation of the plug body 18, the main valve body 7
The valve also rotates 90 degrees and returns to its original position, and the communication between the valve hole 12 and the liquid supply hole 2 and the communication between the valve hole 13 and the liquid drain hole 3 are completely cut off. The liquid hole 2 and the liquid drain hole 3 are communicated with each other through a through hole 14 .

Also, connect the plug body 18 to the body 4 of the outlet 1.
When the push rods 15, 15 are pulled out, the front ends of the push rods 15, 15 separate from the valve bodies 29, 30, so
is the tapered hole 2 due to the urging force of the springs 31 and 32.
3b and 24b.

Therefore, after the plug 17 is removed from the outlet 1, the hot water in the liquid supply hole 2 and the liquid drain hole 3 may leak out, or the flexible hoses 25, 26, the liquid supply hole 23, the liquid drain hole 24 The hot water inside will not leak outside.

In addition, in the above-mentioned embodiment, the projecting pieces 16a,
Since the widths of the long grooves 16b are made different from each other, and the widths of the long grooves 19a, 20a, etc. in the engagement grooves 19, 20 are also made different from each other, it is possible that the projecting tube 21
By connecting the connecting hole 11 to the connecting hole 11 and the projecting tube 22 to the connecting hole 10, there is no possibility that hot water will flow back into the radiator or the like.

As is clear from the above, according to the present invention, it is possible to easily prevent the plug from coming out of the outlet by simply inserting the plug into the outlet and rotating it approximately 90 degrees, and also by inserting and rotating the plug. The main valve on the plug side and the auxiliary valve on the outlet side open, and there is no need to perform these operations separately, so the operation is extremely simple.

Moreover, when the plug is removed from the outlet, the valves on the plug side and the outlet side are always completely closed, so fluid such as hot water does not leak out, which is extremely useful.

Furthermore, in the present invention, by providing the main valve body 7 with the diametrical through hole 14, the liquid flows little by little even when the main valve body 7 is closed, thereby preventing the liquid outlet from freezing in the harsh winter. This is extremely convenient as it prevents this.

[Brief explanation of the drawing]

FIG. 1 is a central vertical sectional view showing an example of a liquid outlet in the device of the present invention, FIG. 2 is a vertical sectional front view taken along the line - in FIG. 1, and FIG. FIG. 4 is a front view showing an example of the plug in the device of the present invention, FIG. 5 is a side view of the same, and FIG. 6 is the liquid outlet shown in FIGS. FIG. 3 is a central cross-sectional view showing a state of connection with the illustrated plug. 1...Liquid outlet, 2...Liquid supply hole, 3...
Drain hole, 4...Main body, 5, 6...Valve seat, 7...Main valve body, 8...Connection body, 9...O ring, 10, 1
1... Connection hole, 12, 13... Valve hole, 14... Through hole, 15... Push rod, 16... Engagement plate, 16a,
16b... Projection piece, 17... Plug, 18... Plug body, 19, 20... Engagement groove, 19a, 20a
... Long groove, 19b, 20b ... Circumferential groove, 19c,
20c...Short groove, 21, 22...Protruding tube, 23...
Liquid supply hole, 24... Drain hole, 23a, 24a... Diameter reducing hole, 23b, 24b... Valve hole, 25, 26...
Flexible hose, 27, 28...cap, 29, 30
...Sub-valve body, 31, 32...Spring, 33...Cover.

Claims (1)

[Claims] 1. By forming protrusions that can engage with each other and hook-shaped engagement grooves in the axial direction on the opening edge of the liquid outlet and the outer periphery of the plug, respectively,
By inserting a plug into a liquid outlet and rotating the plug at a required angle, the plug can be prevented from coming off from the liquid outlet. A first valve hole and a second valve hole are arranged in parallel with each other and are oriented in the axial direction, and a first valve hole and a second valve hole are provided in the liquid outlet.
A main valve body, which is located between the valve holes and has a through hole facing in the diametrical direction, is provided so as to be able to rotate together with the plug, and the front ends of the first valve hole and the second valve hole are arranged to allow the plug to pass through the liquid. When inserted into an outlet,
The rear ends of the first valve hole and the second valve hole are always connected to the liquid supply hole and the liquid drain hole of the plug, and the rear ends of the first valve hole and the second valve hole are connected to the liquid supply hole and the liquid drain hole of the plug, and the rear ends of the first valve hole and the second valve hole are connected to the liquid supply hole and the liquid drain hole. The liquid supply hole and the liquid drain hole are connected to each other, and the communication hole is connected to the liquid supply hole and the liquid drain hole only when the main valve body is in a position where the plug can be inserted. Further, the front ends of the liquid supply hole and the liquid drain hole in the plug can be respectively closed by a auxiliary valve body biased forward by a spring, and the The main valve body in the liquid outlet is provided with a push rod that pushes both the auxiliary valve bodies inward of the plug to open the openings of the liquid supply hole and the liquid drain hole when the plug is inserted. A fluid supply/drainage pipe connection device with antifreeze function.