JPH04194128A - Automatic forced ventilating device for counterweight internal filler - Google Patents

Abstract

PURPOSE:To promote ventilation of gas, generated at the interior of a counter weight and drying of an internal filler by a method wherein an inlet and an outlet for air are formed in proper positions in the counterweight, and the flow of air blowing through the counterweight is formed during running of an engine. CONSTITUTION:A part of cooling air to an engine 2 is caused to flow through a draft hole 15, formed right before a radiator 3, to a counterweight 1. Cooling air flowing to the counterweight 1 promotes drying of a filter 12 and is discharged through a draft hole 16 formed in a rear position. This constitution always purges gas internally generated by the filler 12 in the counterweight 1, and prevents a risk of ignition, in a work wherein fired is used.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a counterweight consisting of a box structure made of steel plates or the like and filled with a mixture of iron sand, concrete, water, iron scraps, etc. It is related to.

[Prior Art] Conventionally, these fillings take a long time to dry, so they are either covered and sealed after they have dried to a certain extent, or after the filling is covered, small ventilation holes are made in the outer wall. This prevents the gas generated inside from becoming trapped and creating high pressure.

FIG. 4 shows an example of the structure of a conventional counterweight, and FIG. 5 shows an example of its use.

[Problems to be Solved by the Invention] Regardless of whether the system is a closed type or a vented type, the chemical reaction of the internal filling continues, although it gradually slows down, even after the lid is closed. Therefore, in the case of a closed type, the gas generated inside is trapped under high pressure, and in the case of a vented type, although the pressure is not trapped, the gas generated inside is filled and accumulated.

Under these conditions, if you attempt to perform construction work that involves fire, such as drilling holes in the counterweight or attaching parts by welding, high-pressure gas will blow out from inside. If the internal gas was flammable, there was a risk of catching fire. The present invention aims to provide a device that solves these problems.

[Means for Solving the Problems] An automatic forced ventilation system for a counterweight internal filling according to the present invention includes a counterweight 1 adjacent to an engine and filled with a filling material, the counterweight 1 comprising:
It consists of a box 11 forming a weight body, a filler 12, and a lid 13, and a ventilation hole 1 is provided at the upper front position of the box 11.
5 is characterized by having a ventilation hole 16 at the upper rear position to take in a part of the cooling air to the engine.

[The engine device adjacent to the counterweight generates a flow of air for cooling by driving its fan, but by using this air flow, it is possible to create a flow of air that blows through the inside of the counterweight.] , to ventilate the gas generated inside the counterweight and to promote drying of the filling inside the counterweight.

[Example] Examples of the present invention are shown in FIGS. 1-3.

In construction machines such as hydraulic excavators, an engine device is adjacent to a counterweight.

The present invention makes use of the air flow created by this engine, and by providing air inlets and outlets at appropriate locations on the counterweight, the air is forced to flow inside the counterweight while the engine is running, without the need for any special equipment. It is characterized by forming a flow of air that blows through the counterweight, ventilating the gas generated inside the counterweight, and promoting drying of the filling inside the counterweight.

FIG. 1 shows a first embodiment of the present invention, in which a part of the cooling air for the engine 2 is flowed through a counterweight 1 just before a radiator 3. In FIG.

FIG. 2 shows a second embodiment of the present invention, in which cooling air is supplied to the engine 2.
This shows a case in which a portion of water is flowed from the rear of the engine to the counterweight 1.

FIG. 3 shows a third embodiment of the present invention, in which the cooling air immediately in front of the radiator is at high speed, so the static pressure in the vicinity becomes negative pressure, and the gas inside the counterweight is sucked out.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

(1) Drying of the counterweight internal filling progresses quickly, and internal gas generation is reduced.

(2) Since internally generated gas is constantly expelled and ventilated, even if the gas is flammable, there is no risk of ignition due to construction work involving fire.

(3) By using the existing air flow for cooling the power unit, the inside of the counterweight can be automatically ventilated and the internal filling can be dried at all times without the need for special equipment.

[Brief explanation of the drawing]

FIG. 1 shows a first embodiment of the present invention, FIG. 2 shows a second embodiment of the invention, FIG. 3 shows a third embodiment of the invention, and FIG. 4 shows a conventional counterweight. Diagram showing the structure, Figure 5
1 is a diagram illustrating an example of the use of a counterweight. 1...Counterweight, 2...Engine, 3...
・Radiator, 4... Fan, 11... Weight body (box), 12... Filler, 13... Lid, 14-1
6..., two vents. Takehiko Suzue, Patent Attorney, Applicant's Representative Case (1) Fig. 1 Fig. 2 Case in which a portion of the cooling air is sucked out using negative pressure Fig. 3 Fig. 11 Main body (box) Fig. 4 Figure 5

Claims (1)

[Claims] A counterweight (1) adjacent to an engine and filled with a filler includes a box (11) forming a weight body, a filler (12), and a lid ( 13), and has a ventilation hole (15) at the upper front position of the box (11) and a ventilation hole (16) at the upper rear position, to take in a part of the cooling air to the engine. automatic forced ventilation system for the counterweight internal filling.