JPS5847001Y2 - Liquid storage tank valve device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved configuration of a valve device for a liquid storage tank such as a fuel tank used in an oil combustor.

Conventionally, valve devices for this type of tank house a valve that can freely open and close the outlet in a valve housing, and fix the valve housing using rivets or directly by spot welding, etc. It was assembled by doing this.

However, when fixing with rivets, drilling holes in the cap to insert the rivets can cause liquid leakage, and when fixing with spot welding, the plated surface of the cap may be destroyed. However, there was a drawback that rust was generated from the welded parts.

The present invention has been made in view of the above-mentioned shortcomings, and below, an embodiment of the present invention will be explained about a fuel tank for an oil combustor, with reference to the drawings. A valve device 4 is screwed onto a mouthpiece 3 that forms a fuel filler port provided on the wall, and an appropriate amount of fuel is supplied by the difference in head.

To explain the valve device 4 in detail, 5 is a cap that is screwed onto the mouthpiece 3 of the fuel tank 1, and a fuel outlet 1 is provided in the center of the bottom wall.
2 is bored, and a recessed portion is provided in the bottom wall so as to surround this outlet 12.

Reference numeral 6 denotes a support plate fixed to the bottom wall of the cap on the outer periphery of the concave portion by spot welding, and is provided with a bent portion 18 formed by bending the open lower periphery provided at the center upward.

Reference numeral 10 denotes a valve storage section placed in the recess, and the outward flange 9 at the lower end is clamped and fixed between the bent portion 18 of the support plate 6 which has been press-deformed and the upper surface of the recess.

Reference numeral 14 denotes a valve element which is housed in the valve storage part 10 and whose tip end is positioned approximately 1 mm inward from the tip end of the outlet 12. Usually, a spring 11 is wound around the valve shaft 13.
The outlet 12 is biased to close the outlet 12.

15 is an O-ring attached to the outer periphery of the valve body 14.

In addition, a through hole 16 is formed in the upper end of the shaft 13 in the horizontal direction, so that it is difficult to attach the valve housing part 10 to the cap 5 by the return force of the spring 11. Insert the pin 17 into the through hole 16 so that the valve body 14 connects to the outlet 12.
Prevents it from moving to the side.

Further, the support plate 6 is formed into a thin disk shape with an open lower portion bored approximately in the center, and the open lower portion is slightly larger than the outer diameter of the flange portion 9 provided at the lower end opening periphery of the valve storage portion 10. A bent portion 18 is formed on the periphery of the open lower opening so as to be intimidating, and the outer periphery of the support plate 6 is fixed in advance to the inner surface of the bottom wall of the cap 5 by spot welding, and then the cap is attached. Plating treatment is performed together with 5.

The structure of the present invention is as described above.Next, the assembly order of the valve device 4 will be explained.In the valve storage part 10, the shaft 13, the spring 11. The valve body 14 is installed inside, and in order to prevent the valve body 14 from detaching from the valve housing part 10 due to the returning force of the spring 11, the shaft 13 is moved from the upper surface of the valve housing part 10 against the returning force of the spring 11. Protrusion and valve storage portion 10
A pin 17 is inserted into a through hole 16 made in the shaft 13 from above to prevent the valve body 14, shaft 13, and spring 11 from descending from the valve storage portion 10.

Next, the flange part 9 of the valve storage part 10 is passed through the open lower part of the support plate 6 and placed in contact with the recessed part of the cap 5, and then the bent part 18 of the opening periphery of the support plate 6 is pushed upward. By pressing from
It is held between the open lower peripheral edge of the cap 5 and the inner bottom wall of the cap 5.

Therefore, the valve accommodating portion 10 is simply and firmly fixed to the cap 5, resulting in a valve device 4 with extremely good sealing properties and rust prevention properties.

Also, after the cap 5 and the valve housing part 10 are fixed, the through hole 16 is opened.
If the pin 17 is removed, the valve device 4 will operate normally.

As described above, according to the present invention, a concave portion is provided in the bottom wall of the cap so as to surround the outlet, and the inner surface of the bottom wall around the outer periphery of the concave portion has a central opening, and the periphery of the opening is bent upward. The bent portion of the support plate is formed by spot welding a supporting plate provided with a bent portion, and further deforming the outward facing flange at the lower end of the valve housing placed in the recessed portion by pressing from above. Since the cap is clamped and fixed by the upper surface of the concave portion, there is no need to drill through holes such as rivet insertion holes in the cap in addition to the outlet, and the cause of liquid leakage can be reduced. Since spot welding work can be performed before plating, it is possible to prevent rust from forming at the welded parts, and it is possible to assemble a valve device with good sealing and rust prevention properties in a simple structure and firmly. .

Further, in the present invention, since the valve housing part can be positioned by the recessed part, the positional relationship between the valve body in the non-accommodating cylinder and the outlet of the cap can be established accurately, and the opening and closing of the outlet can be ensured.

Furthermore, the flange of the valve accommodating portion is placed in the concave portion, and the bent portion of the support plate is pressed and clamped from above, so that the bent portion of the support plate can be deformed approximately horizontally, making it even stronger. This has effects such as being able to fix the valve storage part.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a partially cutaway side view of the same, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a longitudinal cross-sectional view showing the assembly in progress. 5...Cap, 6...Support plate, 10
・・・・・・Valve storage part.

Claims (1)

[Scope of utility model registration request] A valve element energized by the return force of a spring is housed in a non-accommodating cylinder, and the valve element is configured to freely open and close the outlet of a cap screwed onto the mouthpiece of the tank, The bottom wall of the cap is provided with a concave portion surrounding the outlet, and the inner surface of the bottom wall on the outer periphery of the concave portion has a central opening and a bent portion formed by bending upward at the periphery of the opening. A bent part of the support plate is formed by fixing the provided support plate by spot welding, and the outward flange of the lower end of the valve housing placed in the recess is pressed and deformed from above, and the upper surface of the recess. A valve device for a liquid storage tank, characterized in that it is clamped and fixed by.