JPS5849796Y2 - Injection equipment for powders, viscous substances, etc. - Google Patents

Description

[Detailed description of the invention] The present invention relates to an injection device that has been improved to be suitable for viscous materials and powders.
It is an object of the present invention to provide an injection device that eliminates gas leakage that is likely to occur due to accumulation of powder and that has a sharp sharpness at the end of operation.

The drawings showing the embodiments of the present invention will be explained below.
2 is the valve cylinder, 3 is the conduction pipe extending to the bottom of the pressurized container, 4 is the valve rod, 5 is the gasket,
6 is a coil spring.

The valve rod 4 is provided with a discharge passage 7 communicating with the outside, and has a valve orifice 9 extending in the radial direction in communication with the discharge passage 7 in an intermediate small-diameter neck portion 8, and has a valve orifice 9 extending in the radial direction in communication with the discharge passage 7; A contact surface with the gasket 5 is formed at a downwardly continuous shoulder portion 10 .

The gasket 5 has a center hole 12 surrounding the valve orifice 9, and a ring-shaped protrusion 14 is provided on the peripheral surface of the center hole 12 and the lower surface 13 to form a sealing surface with the contact surface of the valve rod 7.

In FIG. 2, ring-shaped protrusions 14 are formed on the upper and lower opening edges of the center hole 12 so as to protrude toward the center, thereby reducing the hole diameter.

When the gasket 5 is attached to the valve rod 4, the ring-shaped protrusion 14 is strongly pressed against the intersection corner 11 of the valve rod 4 in the axial direction of the valve rod and the shoulder 10, thereby enclosing and sealing the valve orifice 9.

The hardening state of the powder/viscous material deposited on the intersecting corner 11 (
Since the ring-shaped protrusion 14 is strong and presses sharply in a small area, the lumps can be crushed and removed to ensure the sealing effect.

Also, even if the other portion of the sealing surface, namely the lower surface 13, becomes incapable of sealing due to powder deposited on the shoulder 10, the non-contact protrusion maintains a seal against the valve orifice.

In FIG. 3, a ring-shaped protrusion 14 is formed on the lower surface 13 of the gasket to provide a normal seal on the center hole 12 surface with respect to the valve orifice, and a ring-shaped protrusion 14 on the shoulder 10
4 can be tightly pressed and sealed.

In this case, since the ring protrusion is provided before the intersecting corner, the intersecting corner 11 can be sealed without being affected by foreign matter or the like.

In FIG. 4, the ring-shaped protrusion 14 is formed so as to face the valve orifice 9, have a convex cross section, and protrude from the inner surface of the center hole 12, except for the upper and lower opening ends of the center hole 12, and directly press against the valve orifice 9 for sealing. .

Since the cutout portion 15 is formed in the intersecting corner portion 11, the intersecting corner portion 11
Can be sealed without being affected by foreign matter.

As described above, the present invention provides ring-shaped protrusions on the central hole surface of the gasket and the sealing surface for the valve orifice formed on the lower surface, so that powder tends to accumulate at the intersection corner between the valve rod axis direction and the shoulder.・The valve orifice can be reliably sealed by avoiding the viscous hardening state.

Moreover, since it is processed into a gasket, it has a practical effect that can be easily adapted to the configuration of conventional general valve bodies.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of the main parts of the injection device implementing the present invention;
FIG. 2 shows an enlarged sectional view of the gasket, and FIGS. 3 and 4 show enlarged sectional views of other embodiments of the gasket. 4...Valve lever, 5...Gasket, 8.
...Small diameter neck of valve rod, 9...Valve orifice, 10...Shoulder of valve rod, 12...Center hole, 14...・Ring-shaped protrusion.

Claims (1)

[Scope of utility model registration request] A contact surface with the sealing gasket is formed on the small diameter neck of the valve rod that opens the valve orifice and a shoulder surface continuous thereto, a sealing surface with the contact surface is formed on the center hole surface and the lower surface of the gasket, and the sealing A device for injecting powders, viscous substances, etc., which has a ring-shaped protrusion partially surrounding a valve orifice on its surface.