JPH0442354Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field to which the invention belongs) This invention relates to a device that eliminates the noise generated when the pressurized air inside a hollow pipe for building sand piles (including sand-like material piles) is rapidly discharged. be.

(Issues of the invention and its features) Various methods have already been developed for eliminating the noise generated when the pressurized air inside the hollow pipe for sand pile construction is rapidly exhausted from the rapid exhaust pipe. -135903, etc.), and the purpose of the present invention is basically the same as those of these prior art techniques.

This invention uses the internal space of the hopper for noise reduction by releasing the exhaust air from the rapid exhaust pipe into the hopper for inserting pile material, which is installed at the top of the hollow pipe for sand pile construction. This is a concept, and its structural feature is that the rapid exhaust pipe of the hollow pipe for sand pile construction is oriented upward, and the conduit connected to this pipe is opened into the hopper above.

(Specific explanation of the invention) In Figs. 1 and 2 showing an embodiment of the invention, 1 is a hollow pipe for sand pile construction (hereinafter abbreviated as hollow pipe), 2 is a hopper, , the hopper 2 consists of an input section 3 and a main body section 4, and the main body section 4 is assembled into the upper part of the hollow tube 1.

A valve 5 is provided in the hollow tube 1 below the main body 4, and a quick exhaust pipe 6 is provided projecting below the valve 5 and extends upward. Then, the pressure air in the hollow tube 1 is rapidly discharged by opening a valve 7 provided in the middle of the rapid exhaust pipe 6.

A pipe line 8 is connected to the rapid exhaust pipe 6, and the end of the pipe line 8 opens into the main body part 4, so that the exhaust gas is discharged into the main body part 4.

In the illustrated embodiment, a part of the conduit 8 is composed of a silencer pipe 9 having a double inner and outer pipe structure.
can be omitted.

Although the opening position of the conduit 8 is arbitrary, it goes without saying that a position that does not interfere with the original function of the hopper 2 is appropriate.

In another embodiment of the present invention shown in FIGS. 3 and 4, the distal end of the conduit 8 is constituted by an inner and outer double pipe 10, which is installed across the interior of the main body 4.

A large number of small holes 12 are provided in the inner tube 11 of the inner and outer double tube 10.
However, horizontal window holes 14 are perforated in the outer pipe 13, and the tips of the inner and outer double pipes 10 are closed, and the exhaust from the rapid exhaust pipe 6 is passed through the small holes 12 and the windows. It is adapted to be discharged into the main body 4 through the hole 14.

(Effects of the Invention) Since the present invention is as described above, the noise generated when the pressure air inside the hollow tube is rapidly exhausted can be effectively eliminated by using the hopper attached to the hollow tube.

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of the present invention, FIG. 2 is a partially sectional side view, FIG. 3 is a side view similar to FIG. 2 of another embodiment of the present invention, and FIG. 4 is a side view of another embodiment of the present invention. is a partially enlarged sectional view of FIG. 3; 1...Hollow tube, 2...Hopper, 6...Rapid exhaust pipe, 8...Pipe line,...

Claims (1)

[Scope of utility model registration request] With the rapid exhaust pipe of the hollow pipe for sand pile construction facing upward,
A rapid exhaust silencing device for a hollow pipe for sand pile construction, characterized in that a conduit connected to the pipe is opened in an upper hopper.