JPS5931999Y2 - drain device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drain device used in a radiator or the like.

4 to 6 are longitudinal sectional side views showing three examples of conventional drain devices.

In the example shown in FIG. 4, a cylindrical drain guide 2 with a drain passage 2C laterally branched is fitted onto a drain sheet 6 that is liquid-tightly attached to a container 7 (for example, a radiator tank).
A drain cock 3 provided with an axial drain groove 3C is screwed onto this to form a drain device 1.

In this example, when the liquid in the container is discharged (drained) in the direction of the dotted arrow, leakage occurs from the end 2a of the drain guide 2 in the direction of the Z arrow.

In the example shown in FIG. 5, a male thread is formed in the large diameter part of the drain cock 3 consisting of a large diameter part and a small diameter part, and the O-ring fitted in the small diameter part is screwed into the drain seat 6.
This is to prevent the liquid from flowing out when the drain is not removed by making elastic contact with the hole in the drain seat. Leakage occurs from the end 2a of the drain guide 2 in the directions of the two arrows.

In these devices, the drain cock 3, drain guide 2, etc. are often made of molded products, so
There is a limit to maintaining its dimensional accuracy, and it has been difficult to prevent leakage from the drain guide end 2a and the like.

In particular, since most automobile engine coolants now use antifreeze, when replacing or removing antifreeze, a drain device is needed to ensure that the liquid can be recovered without scattering around. was desired.

The example shown in FIG. 6 uses an O-ring 10 and an annular backing 11 in order to eliminate leakage in the direction of the arrow Z as described above.

In the structure No. 2, the intended leakage in the Z direction in FIGS. 4 and 5 can be prevented, but the number of backings increases, and the annular groove 12 to accommodate the O-ring 10 is formed on the inner surface of the seal hole 2b of the drain guide. This has the disadvantage that the work becomes troublesome.

The purpose of the present invention is to obtain a drain device that eliminates the drawbacks of the conventional device as described above, and the drain flow path 2C is branched from the drain sheet 6 that is liquid-tightly attached to the container 7. Install the cylindrical drain guide 2,
In a drain device capable of discharging liquid in a container to the outside via a drain flow path 2C by moving a drain cock 3 having a male thread that engages with a female thread of the drain sheet 6 and a drain groove 3b formed at the tip, the drain sheet 6, forming a cylindrical seal hole with an inner diameter larger than that of the female thread and having an inner diameter equal to the inner diameter of the drain guide 2, and a sealing surface that forms the bottom of this seal hole and is perpendicular to the axis of the female thread;
The drain cock 3 has a blocking part that slidably fits into the seal hole of the drain guide at its rear end, and an O-ring support part that is located between the blocking part and the male thread and has a smaller diameter than the blocking part. A drain device is constructed by forming O-rings that come into elastic contact with both seal holes and fitting them therein.

Next, embodiments of the present invention shown in FIGS. 1 to 3 will be described.

As shown in FIGS. 1 and 2, the drain device 1 has a generally short cylindrical drain sheet 6, and the drain sheet 6 is attached to the lower side of the container 7 in a liquid-tight manner.

A female thread 6a is formed on the inner surface of the drain sheet 6 on the container 7 side, and a concentric seal hole 6b having a diameter larger than the inner diameter of the female thread 6a is formed on the outside of the female thread 6a. A sealing surface 6C that is perpendicular to these axes is formed between them.

A drain guide 2 is fitted into this drain sheet 6, and the drain guide 2 has a seal hole 6b of the sheet 6.
A seal hole 2b concentric with the drain hole 2b is formed, and a drain flow path 2C that communicates the seal hole 2b with the outside is branched at the lower part.

On the other hand, a drain cock 3 is screwed into the female thread 6a of the drain seat 6 by a male thread 3a formed at its tip, and by rotating the cock 3, the cock is rotated in the direction of arrow A or B in FIG. can be moved to

The drain cock 3 is formed with a drain groove 3b that is open at the tip, and when the drain cock 3 is rotated and pulled in the direction A in FIG. Space 4 between and drain channel 2C
This allows the inside of the container 7 to communicate with the outside.

A blocking portion 3C having a diameter slightly smaller than the diameter of the seal hole 2b of the drain guide 2 is formed on the near side of the male thread 3a of the drain cock 3, that is, on the left side in FIG. A support portion 3f for an O-ring 10 having a smaller diameter than the male thread 3a is formed between the O-ring 10 and the male thread 3a.

As this support portion 3f, a relief portion when forming the male thread 3a can be used.

Furthermore, a flange-like stopper 3d and an operation part 3e are formed at the end of the blocking part 3C of the drain cock 3, and the stopper 3d prevents the cock 3 from being pushed into the container 7 side more than necessary. ing.

Since this drain device has the above-described configuration, when not in use, the stopper 3 is rotated by the operation part 3e of the drain cock 3, as shown in FIG.
Move the cock 3 fully in the direction of arrow B until the end 2a of the drain guide 2 comes into contact with the end 2a of the drain guide 2, and then tighten it.

As a result, the O-ring 10 is in sliding contact with the sealing hole 6b of the drain sheet 6, and its side surface is brought into contact with the sealing surface 6C of the drain sheet 6, so that the inside of the container 7 is filled with the O-ring 10.
0, and the liquid in the container 7 will not leak to the outside.

Next, when draining the liquid in the container 7, the drain cock 3 is rotated in the opposite direction to the above, and the cock 3 is moved in the direction of arrow A in FIG.

As the cock 3 moves in the A direction, the O-ring 10 also slides in contact with the seal hole 2b of the drain guide 2 and moves in the A direction while maintaining a sealing state with the outside. When the cock 3 moves a certain distance, the container 7 is closed. Drain groove 3b inside and outside, space 4
and a drain channel 2C, and the liquid in the container 7 is discharged to the outside.

At this time, since the O-ring 10 is held in sliding contact with the seal hole 2b between the drain cock 3 and the drain guide 2, the drain guide 2 through which the drained liquid flows.
The space between the space 4 and the end 2a is reliably closed, and the liquid being discharged will not leak from the end 2a in the Z direction in FIG.

When the liquid has finished draining, rotate cock 3 again,
It is moved fully in the B direction and tightened, the inside and outside of the container 7 are closed off by the O-ring 10 and the drain sheet 6, and new liquid can be poured into the container 7.

The drain device 1 configured as described above can be used for automobile radiators and other general containers that require draining.

As explained above, according to the present invention, the O-ring 10 provided on the drain cock 3 reliably closes the inside and outside of the container when the drain device 1 is not in use, and when discharging the drain, the O-ring 10 moves with the cock 3 and prevents the drain from leaking out of the drain flow path no matter where the cock 3 is located, so that the drain does not leak to the outside from the end 2a of the drain guide 2, etc. Therefore, not only is it possible to prevent the drain from leaking and scattering during the drain removal operation and contaminating the surrounding area, but also the drain can be reliably recovered.

In addition, there is no need to use sealing means such as grinding as in the past, and the number of parts is the same as in the past, so it is possible to manufacture and provide a high-performance drain device 1 without increasing product cost. be.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional side view showing an embodiment of the drain device according to the present invention in an open state, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is a longitudinal cross-sectional view showing the drain device in a closed state. The side view, FIG. 4, FIG. 5, and FIG. 6 are vertical side views showing a conventional drain device. 1 Ni-drain device, 2 Ni-drain guide, 2a: end,
2b: Seal hole, 2C Nidrain flow path, 3 Nidrain cock, 3a: Male thread, 3b Nidrain flow path, 3C: Blocking part, 3d: Stopper, 3e: Operation part, 4: Space, 6: Drain seat, 6a: Female thread, 6b: Seal hole, 6C:
Seal surface, 7: Container, 10: O-ring, 11: Packing, 12: Annular groove.

Claims (1)

[Scope of utility model registration request] A cylindrical drain guide 2 with a branched drain flow path 2C is attached to a drain sheet 6 that is liquid-tightly attached to a container 7, and a male screw 3 is screwed into the female screw 6a of the drain sheet 6.
In a drain device in which a drain cock 3 having a drain groove 3a and a drain groove 3b formed at its tip can be moved to discharge liquid in a container to the outside via a drain flow path 2C, a drain seat 6 is provided with a female thread 6a larger than the internal thread 6a. A cylindrical seal hole 6b with an inner diameter equal to the inner diameter of the drain guide 2.
A sealing surface 6C is formed at the bottom of the sealing hole 6b and is perpendicular to the axis of the female screw 6a, and the drain cock 3 has a sealing surface 6C at its rear end which is slidably fitted into the sealing hole 2b of the drain guide. A blocking portion 3C and an O-ring support portion 3f that is located between the blocking portion 3C and the male thread 3a and having a smaller diameter than the blocking portion 3C are formed, and an O-ring 10 that comes into elastic contact with both seal holes 2b and 6b is fitted. Drain device.