JPH024345B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a water sprinkling device for use in a hydraulically driven destruction machine and for preventing the generation of dust.

[Background of the invention]

In general, destructive machines driven by hydraulic pressure generate less noise and other pollution, and are therefore widely used as demolition machines, including for concrete destruction. However, even with this breaking machine, there have not been many improvements made in terms of countermeasures against dust generated when breaking concrete and the like. As a conventional dust countermeasure, enclosing the work site with a tent or the like has been carried out, but the working conditions are extremely poor for workers working inside the tent or the like. Another method is to use water pumps to spray water onto concrete, etc., but it is extremely dangerous for workers to approach the demolition machine while holding a hose, so water is sprayed from a distance. It's not very effective. In addition, when water is sprayed, only the surface of the concrete to be destroyed is wetted, so the newly cracked surface is dry and dust is still generated. As a countermeasure against this problem, it is possible to achieve some effect by discharging a large amount of water using other power sources such as a sprinkler, but using a large amount of water also makes it difficult to treat sewage. This causes secondary pollution and increases operating costs, such as the cost of expensive sprinklers and operating them.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and its purpose is to provide a water sprinkling device for a destruction machine that can prevent the generation of dust without using an expensive water sprinkler or the like.

[Summary of the invention]

In order to achieve the above object, the present invention provides a breaking machine equipped with an actuator driven by hydraulic pressure, which has a head side chamber communicating with the actuator and a rod side chamber into which a spring for pressing the piston toward the head is inserted. A water pump having a cylinder, a plunger connected to a piston rod of the cylinder, a water tank connected to an intake port of the water pump, a nozzle and an accumulator connected to a discharge port of the water pump, and from the water tank to the water pump. a first check valve that allows flow from the water pump to the nozzle and the accumulator, and a second check valve that allows flow from the water pump to the nozzle and accumulator. It is characterized in that the nozzles are set in correspondence with each other, and the nozzle is located at or near the destruction portion.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a hydraulic power source, 2 is a three-position directional control valve with two input ports connected to the hydraulic power source 1 and a tank 3, and two output ports connected to an actuator (described later); 4 is a directional control valve 2; 5 is an actuator (cylinder in the example) connected to the directional control valve 2 via pipes 6 and 7; 8 and 9 are two links that swing relative to each other around a pin 10; 11 is a link 8; is fixed to the main body, and 12 is a breakable portion formed on one end side of the links 8 and 9, respectively. The actuator 5 is interposed at the other ends of the links 8 and 9.
Reference numeral 13 denotes a head side chamber 14 and a head side chamber 17 into which a spring 16 for pressing the piston 15 is inserted.
A cylinder equipped with a head side chamber 14 of the cylinder.
is connected to a pipe line 6 that connects the head side chamber of the actuator 5 and the directional control valve 4. Reference numeral 19 denotes a water pump having a plunger 20 connected to the piston rod 18 of the cylinder 13; It is connected to the nozzle 24 and the accumulator 25 via the nozzle 24 and the accumulator 25. 26 is a first check valve that allows flow from the water tank 22 to the water pump 19;
6 is provided in the conduit 21. 27 is a second check valve that allows flow from the water pump 19 to the nozzle 24 and the accumulator 25;
is provided in the conduit 23. The nozzle 24 is provided directly on the destruction portion 12 or in the vicinity thereof.

In the above configuration, the operation when destroying concrete or the like will be explained. When the directional control valve 2 is switched to the right position using the operating lever 4, the hydraulic power source 1
Pressure oil is introduced into the rod side chamber of the actuator 5, and pressure oil is discharged from the head side chamber of the actuator 5 into the tank 3. As a result, the links 8 and 9 move around the pin 10, and the destructive portion 12 is opened. At this time, the head side chamber 1 of the cylinder 13
4 is opened to tank 3 via pipe 6,
The force of the spring 16 operates the piston 15 and the plunger 20 of the water pump 19, and the water pump 19 sucks water from the water tank 22 through the pipe 21 and the first check valve 26, resulting in the state shown in the figure. When the directional control valve 2 is switched to the left position using the operating lever 4 from this state, the pressure oil from the hydraulic source 1 is guided to the head side chamber of the actuator 5, and the pressure oil is discharged from the rod side chamber of the actuator 5 into the tank 3. be done. As a result, the links 8 and 9 swing about the pin 10 in the opposite direction to the above-mentioned direction, and the breaking portion 12 closes and the concrete is held and broken by strong hydraulic pressure. At this time, pressure oil equal to the high pressure in the head side chamber of the actuator 5 is introduced from the pipe line 6 into the head side chamber 14 of the cylinder 13, so this pressure oil causes the piston 15 to move against the spring, and the piston rod 18 The plunger 20 of the water pump 19 connected to the pump also operates synchronously.
By the operation of this plunger 20, the water pump 1
9 passes through the pipe 23 and the second check valve 27, a part of the water is ejected from the nozzle 24, and the rest is stored in the accumulator 25. The cracked part becomes wet at the same time as it is destroyed. At this time, the flow from the water pump 19 to the water tank 22 is stopped by the first check valve 26. The water fountain from the nozzle 24 in the foregoing is
Even when the piston 15 of No. 3 reaches the stroke end, the stroke continues as long as water is stored in the accumulator 25. By repeating the above operations, concrete destruction work is performed.

In addition, although the case where concrete is destroyed by introducing high-pressure oil to the actuator 5 has been described above, in a light load such as pinching an object between the breaking parts 12 of the links 8 and 9, or in a no-load operation where nothing is pinched, The spring 16 prevents the cylinder 13 and water pump 19 from operating.

In addition, when the nozzle 24 is a nozzle capable of spraying water in the form of atomized water, it is possible to
Not only can it wet the cracked area, but it can also supply water to a wide area, and it can also capture small amounts of dust that would otherwise be scattered in the air. and again,
Since the water is sprayed in a mist, the amount of water sprayed can be reduced.

〔Effect of the invention〕

As explained above, according to the water sprinkling device in the destruction machine of the present invention, the hydraulic pressure that operates the actuator of the destruction machine can be used to reliably wet the cracked part only when the destruction object is destroyed. can be sufficiently prevented from occurring. Also,
The sprinkler system has a simple structure that does not require an external driving power source, and therefore can be made very inexpensively. In addition, since water is only sprayed during destruction, the amount of water can be reduced to the minimum necessary.

[Brief explanation of drawings]

The figure is an explanatory diagram showing an embodiment of the water sprinkler device in the destruction machine of the present invention. 1... Hydraulic source, 2... Directional switching valve, 3... Tank, 5... Actuator, 8, 9... Link,
10... Pin, 12... Destruction part, 13... Cylinder, 14... Head side chamber, 15... Piston, 1
6... Spring, 17... Rod side chamber, 18... Piston rod, 19... Water pump, 20... Plunger, 22... Water tank, 24... Nozzle, 2
5... Accumulator, 26... First check valve, 2
7...Second check valve.

Claims (1)

[Claims] 1. Two links that swing relative to each other and 2 links each.
a destruction portion molded at one end of the two links, an actuator interposed at the other end of the two links, and a hydraulic source supplying pressure oil to the actuator;
In a destruction machine equipped with a directional switching valve that controls the flow direction of pressure oil from the hydraulic source to the actuator and the flow direction of pressure oil from the actuator to the tank, the head side chamber communicated with the actuator and the piston are pushed toward the head side. a water pump having a plunger connected to a piston rod of the cylinder; a water tank connected to a suction port of the water pump; and a water tank connected to a discharge port of the water pump. The spring of the cylinder consists of a nozzle and an accumulator, a first check valve that allows flow from the water tank to the water pump, and a second check valve that allows flow from the water pump to the nozzle and the accumulator. 1. A water sprinkling device for a breaking machine, characterized in that an operation setting value of a piston is set in accordance with a breaking force by the breaking part, and the nozzle is located at or near the breaking part.