JP2554188Y2 - Filler neck for radiator tank - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filler neck for water supply projecting from an upper part of a radiator tank, and to a filler neck having a pressure valve-equipped cap removably attached thereto.

[0002]

2. Description of the Related Art A conventional filler neck has been constructed as shown in FIGS. That is, the upper flange 17 communicates with the upper end of the tank 17 via the neck 19. A pipe portion 6 is integrally provided on the outer periphery of the cylindrical portion 5 to protrude therefrom. A valve seat portion 4 is formed at an opening edge of the inner flange-shaped portion 1, and a pressure valve 2 is detachably seated therein. The pressure valve 2 projects from the inner surface of the cap body 3 via a coil spring 8 and is urged downward. Further, a negative pressure valve 12 is provided at the center of the pressure valve 2. A large number of tubes 10 are connected to the tank 17 via a tube plate 9 in a liquid-tight manner, and fins 11 are provided on the outer surface of the tubes 10. Then, the engine cooling water flows into the tank 17, flows down the respective tubes 10, and flows out of the lower tank (not shown). And tube 10 and fins
Cooling air is circulated on the outer surface side of 11 to cool the engine cooling water. When the temperature of the engine cooling water rises above a certain level, the internal pressure of the tank 17 increases, and the pressure valve 2 rises against the coil spring 8. Then, the cooling water and steam in the tank 17 rapidly flow out of the gap between the pressure valve 2 and the valve seat 4 and are guided to the surge tank (not shown) through the pipe 6 and the hose (not shown). When the internal pressure in the tank 17 drops below the atmospheric pressure, the negative pressure valve 12 moves downward, and the cooling water in the surge tank flows into the tank 17 via the pipe 6 and the negative pressure valve 12.

[0003]

However, according to the experiment of the present inventor, according to the experiment of the present inventor, when the internal pressure of the tank 17 increases and the pressure valve 2 rises, the steam and the boiling which suddenly squirt from the gap between the pressure valve 2 and the tank 17 are increased. The cooling water flows into the opening 15 of the pipe 6 at the same time. At this time, as shown in FIG. 8, the airflow and the cooling water are linearly concentrated in the opening 15 of the pipe portion 6 from all directions. As a result, the flow of the cooling water and the airflow flowing through the pipe portion 6 is disturbed, and the overflowed cooling is performed. There is a disadvantage that it takes a certain amount of time to guide water or steam from the pipe section 6 to the surge tank. As a result, it is difficult to discharge steam or the like smoothly, and there is a possibility that the set pressure of the pressure valve cannot be accurately maintained.

[0004]

Accordingly, the present invention employs the following structure in order to solve the above-mentioned problems. That is, the filler neck of the radiator tank of the present invention is formed at the lower end.
The opening of the inner flange 1 communicates with the upper end of the tank 17
At the same time, the water supply cap body 3 is detachably attached to the upper end.
And a plug protruding from the center of the cap body 3.
The opening edge of the inner flange-shaped portion 1
The cylindrical part 5 which is detachably seated on the valve seat part 4 of the
On the inner peripheral surface of the tubular portion 5 located above the valve seat 4
A cooling water conducting pipe portion 6 which is opened.
At the filler neck of the eta tank,
At the center in the radial direction of the zigzag part 1, substantially concentric with the cylindrical part 5
The annular annular wall 7 is raised up to the height of the opening 15 or higher.
And a large number of holes 14 are separated from each other in the annular wall 7.
It is characterized by being formed in between.

[0005]

In FIG. 1, when the internal pressure of the tank 17 increases, the pressure valve 2 is pushed up, and the airflow and the boiling water flow over the annular wall 7 or from the hole 14 of the annular wall 7 to the straightening path.
Flow into 18. And they are rectified in the rectification path 18,
The cooling water or the like which is smoothly guided to the opening 15 of the pipe portion 6 and overflows is quickly removed from the tank, and the function of the pressure valve is accurately maintained.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of the first embodiment of the present invention,
FIG. 2 is a schematic sectional view taken along the line AA in FIG. This embodiment differs from the conventional filler neck of FIGS. 7 and 8 in that an annular wall 7 is provided. That is, a substantially annular annular wall portion 7 is provided upright at a radially intermediate portion of the inner flange-like portion 1. As shown in FIG. 3, the annular wall portion 7 is formed by forming a large number of holes 14 in a strip-shaped metal plate, and is formed substantially entirely in an annular shape. Such an annular wall portion 7
Is fixed vertically between the inner peripheral wall of the cylindrical portion 5 and the valve seat portion 4 of the inner flange-shaped portion 1. And this annular wall part 7
1 is formed sufficiently higher than the pipe portion 6 as shown in FIG. 1, and its plane is substantially annular and coaxially arranged on the cylindrical portion 5 as shown in FIG. Then, an annular rectification path 18 is formed between the annular wall portion 7 and the inner surface of the cylindrical portion 5. At the upper end opening of the cylindrical portion 5 thus formed, the cap body 3
Are detachably fastened. That is, the claw portion 23 of the cap body 3 is locked by the locking portion 21 formed on the upper edge of the cylindrical portion 5. Then, the leaf spring 13 on the inner surface side of the cap body 3 is pressed against the upper end of the cylindrical portion 5 in a liquid-tight manner via packing. Then, the pressure valve 2 projecting from the center of the cap body 3 is urged downward by the coil spring 8, and the lower surface thereof is pressed against the valve seat 4. A negative pressure valve 12 is provided at the center of the pressure valve 2, and the negative pressure valve 12 is urged upward by a coil spring. In this embodiment, the tank 17 and the cylindrical portion 5 are integrally formed of a synthetic resin material. The tank 17 is formed in an elongated box shape with one end opened, and its entire periphery is fitted into an annular groove of the tube plate 9 via an O-ring, and both are fastened and fixed in a liquid-tight manner by caulking.

Next, FIG. 4 is a perspective view of another embodiment of the annular wall portion 7 provided inside the filler neck according to the present invention. The upper edge of the band-shaped metal plate is cut off in a rectangular wave shape, and the whole is cut. It is bent in a substantially annular shape. Then, in place of the annular wall portion 7 in FIG. 1, that of FIG. 4 is arranged. In the case of this embodiment, when the internal pressure of the tank 17 is increased and the pressure valve 2 is pushed up, the steam and the cooling water which are rapidly spouted from the gap between the pressure valve 2 and the valve seat portion 4 are removed by the annular wall portion. 7 penetrates the straightening path 18 in FIG. 1 beyond the notch 16 and the upper end edge of FIG. 7, is guided in an arc in the annular straightening path 18, and is discharged outside through the opening 15. Also in this embodiment, it is possible to prevent steam or the like ejected from the valve seat portion 4 from flowing directly into the opening 15 and being concentrated. Next, FIG. 5 shows a third embodiment of the present invention. In this embodiment, the annular wall portion 7 is made of a synthetic resin molded body.
The tank 17 and the cylindrical portion 5 are integrally formed. Next, FIG. 6 shows another embodiment of the present invention. In this embodiment, the annular wall portion 7 is formed by bending a metal plate, and is formed when the tank 17 and the cylindrical portion 5 made of a synthetic resin material are formed. By being inserted, they are integrally fixed.

[0008]

[Devised effects present invention of the filler neck, without steam and boiling water rapidly flows out pushes the pressure valve 2 is concentrated in the opening 15 of the direct pipe section 6, they
Is rectified through the hole 14 of the annular wall portion 7 and flows to the rectification path 18.
Enter. Then, steam or the like is smoothly opened from the flow straightening path 18.
It is led to 5. As a result, steam and boiling water can be removed smoothly, and the reliability of the function of the pressure valve of the radiator tank is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a first embodiment of a filler neck of the present invention.

FIG. 2 is a schematic cross-sectional view taken along the line AA in FIG.

FIG. 3 is a schematic perspective view of the annular wall portion 7 of the first embodiment.

FIG. 4 is a schematic perspective view of another embodiment of the annular wall portion 7;

FIG. 5 is a longitudinal sectional view of another embodiment of the filler neck of the present invention.

FIG. 6 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a conventional filler neck.

8 is a schematic sectional view taken along the line BB in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner flange part 2 Pressure valve 3 Cap main body 4 Valve seat part 5 Cylindrical part 6 Pipe part 7 Annular wall part 8 Coil spring 9 Tube plate 10 Tube 11 Fin 12 Negative pressure valve 13 Leaf spring 14 Hole 15 Opening 16 Notch 17 Tank 18 Straightening path 19 Neck 20 Negative pressure valve 21 Locking part 23 Claw

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahiko Shirahige 31-2 Sakuragaoka-cho, Shibuya-ku, Tokyo Toyo Radiator Co., Ltd. (72) Seizo Kamiya 31-2 Sakuragaoka-cho, Shibuya-ku, Tokyo Toyo Radi (72) Inventor Hisae Nishikawa 31-2 Sakuragaoka-cho, Shibuya-ku, Tokyo Toyo Radiator Co., Ltd. (56) References JP-A-59-23029 (JP, A) JP-A-62-282111 ( JP, A)

Claims (1)

(57) [Scope of request for utility model registration] An opening of an inner flange-shaped portion formed at a lower end communicates with an upper end of a tank, and a cap body for water supply is detachably attached to an upper end, and a center of the cap body is provided. A pressure valve 2 protruding from the cylindrical portion 5 removably seated on the valve seat portion 4 at the opening edge of the inner flange-shaped portion 1, and an axis positioned above the valve seat portion 4. A cooling water conducting pipe portion 6 opening on the inner peripheral surface of the cylindrical portion 5, and a filler neck of a radiator tank including the cylindrical portion 5 at a radially central portion of the inner flange portion 1. A substantially annular annular wall portion 7 is formed concentrically up to the height of the opening 15 or higher, and
That a large number of holes 14 are formed in the wall 7 at a distance from each other.
Characterized filler neck of radiator tank.