JPH07121509B2 - Sandblasting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is used for dirt on concrete surface, cleaning for removing previous coating for painting, surface treatment for roughening concrete surface, rust for iron products and cleaning for removing previous painting. The present invention relates to a sandblasting device.

[0002]

2. Description of the Related Art The conventional sandblasting apparatus described above is
For example, it is composed of a hopper that stores dry sand, a pump that pressurizes and supplies water in a water storage tank, and a nozzle that supplies dry sand from the hopper and that supplies water from the pump. A valve for adjusting the amount of sand supplied, for starting the supply of sand, and for stopping the supply of sand is provided between and.

When sandblasting is carried out by the sandblasting apparatus thus constructed, the valve is adjusted to adjust the amount of sand supplied to the nozzle, and the pump is operated to supply water of a predetermined pressure to the nozzle. Inside, water and sand are mixed and discharged from the nozzle. Therefore, water and sand discharged from the nozzle are sprayed on the concrete surface, for example, to stain the concrete surface, cleaning to remove the previous paint for painting, surface treatment to roughen the concrete surface, spraying on the surface of iron products. It is possible to perform sandblasting such as rust and cleaning to remove the previous paint.

[0004]

The conventional sandblasting apparatus is constructed so as to supply the sand from the hopper to the nozzle by utilizing the fluidity of the sand. Therefore, since wet sand cannot be used to secure the fluidity of sand, it is necessary to always prepare dry sand, which requires a space for storing the sand while drying it. Further, since the sand and the water are mixed by the nozzle, there is a disadvantage that the sand does not get wet and scatters out of the working range.

The present invention has been made in order to solve the above-mentioned inconvenience, does not require management of sand, can be used even with wet sand, and does not scatter sand outside the working range. A sandblasting device is provided.

[0006]

A sandblasting apparatus according to the present invention is provided with a pressurized water supply source for supplying pressurized water, an inflow port and an outflow port, and an on-off valve for opening and closing the inflow port.
And pressurization water is supplied with the inlet closed by the on-off valve.
When pressurized water is supplied from the source via the pressurized water supply pipe,
A tank for discharging the sand housed with water from the outlet is disposed in the outlet of the tank, a supply valve for opening and closing the flow path, and a flow regulating valve provided on the pressurized water supply pipe, the flow rate adjustment
One end is connected to the valve and the other end is connected to the outlet of the tank and the supply valve.
To the outflow side of the supply valve and the bypass water pipe connected between
Compressed air supply that supplies compressed air through the compressed air supply pipe
It is provided with a supply source and a pressure resistant hose having one end connected to a connection point between the compressed air supply pipe and the supply valve and a nozzle connected to the other end.

[0007]

[Action] sandblasting apparatus of this invention, inlet
The sand is supplied from the mouth and the inlet is closed by the on-off valve.
Supply pressurized water from the pressurized water supply source to the tank and open the supply valve.
Then, the sand and water from the outlet of the tank are discharged from the outlet side of the supply valve.
Outflow to. At this time, supply to the tank with the flow rate adjustment valve
Ratio of pressurized water and pressurized water supplied directly to the outlet of the tank
The ratio of sand changes by changing the ratio of
It Then, compressed air is supplied from the compressed air supply source to the flow of the supply valve.
When supplied to the outlet side , the sand and water are sent to the nozzle in the pressure-resistant hose by compressed air and discharged.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a sandblasting apparatus which is an embodiment of the present invention. In FIG. 1, 1 is a main water supply pipe for supplying water, 2A, 2B, 2C, 2
D represents a first, second, third and fourth water supply pipe, watering supply
The first water supply pipe 2A as a water pipe connects the water supply main pipe 1 and the water spray nozzle 6 of the hopper 4 described later, and serves as a pressurized water supply pipe.
The second water supply pipe 2B is water mains 1 and connects the tank 7 to be described later, the second water supply pipe 2B and the tank 7 third water supply pipe 2C as a bypass water supply pipe via a flow regulating valve 14 to be described later of
And a fourth water supply pipe 2D as a cleaning water supply pipe connects the water supply main pipe 1 and a compressed air supply pipe 17 described later.

3 is a sprinkling valve provided in the first water supply pipe 2A
The manual first valve, 4 indicates a hopper, the hopper 4, the wire net 5 to regulate from entering a certain particle size or more sand and debris were sorted particle size of charged sand, the wire net 5 There is provided a sprinkling nozzle 6 for pouring the sand having the particle size which has passed through into the inflow port 7i of the tank 7. Reference numeral 7 denotes a tank, which is a manual valve as an on- off valve that opens the inflow port 7i to allow the sand and water from the hopper 4 to flow in and closes the inflow port 7i to stop the inflow of sand and water from the hopper 4. The second valve 8 is provided at the inflow port 7i.

9 is a supply connected to the outlet 7o of the tank 7.
The first solenoid valve as a valve is shown to control the outflow amount of sand and water from the tank 7 and / or water from the third water supply pipe 2C. 10 is an additional member provided in the second water supply pipe 2B.
A pump as a pressurized water supply source , 11 is a second solenoid valve as a pressurized water valve provided in the second water supply pipe 2B on the tank 7 side of the pump 10, and 12 is a second solenoid valve on the tank 7 side of the second solenoid valve 11. Water pressure adjusting valve provided in the water supply pipe 2B, 13 is the water pressure adjusting valve 1
2 shows a water pressure gauge connected to 2.

Reference numeral 14 denotes a flow rate adjusting valve provided on the second water supply pipe 2B on the tank 7 side of the water pressure adjusting valve 12 for adjusting the amount of water supplied to the tank 7 and the amount of water supplied to the third water supply pipe 2C. Is. The third water supply pipe 2C has one end connected to the flow rate adjusting valve 14 and the other end connected to the outlet 7o of the tank 7.
And the first solenoid valve 9 are connected. Reference numeral 15 denotes a third solenoid valve as a water supply valve provided in the fourth water supply pipe 2D.

Reference numeral 16 is a compressor as a compressed air supply source , and 17 is a compressed air supply pipe. This compressed air supply pipe 17 supplies compressed air supplied from the compressor 16 to the first compressed air.
It is supplied to the outflow side of the solenoid valve 9. Reference numeral 18 denotes a manual type third valve as a compressed air valve provided in the compressed air supply pipe 17.
A valve, 19 is a pressure adjusting valve provided in the compressed air supply pipe 17 closer to the first solenoid valve 9 than the third valve 18, 20 is a pressure gauge connected to the pressure adjusting valve 19, and 21 is more than the pressure adjusting valve 19. compression provided to the first electromagnetic valve 9 side compression air supply pipe 17
A fourth solenoid valve as an air supply valve , 22 is a pressure-resistant hose whose one end is connected to a connection point between the first solenoid valve 9 and the compressed air supply pipe 17, and 23 is a nozzle connected to the other end of the pressure-resistant hose 22. Show.

The fourth water supply pipe 2D is connected to the first solenoid valve 9
And a fourth electromagnetic valve 21 are connected to the compressed air supply pipe 17. Reference numeral 24 denotes an operation unit having a remote control function, 25 denotes a control unit, and the control unit 25 is the operation unit 2
Based on the input from 4, each unit is controlled as described later.

Next, the operation will be described. In the initial state, the first to third valves 3, 8, 18 and the first to fourth
The electromagnetic valves 9, 11, 15 and 21 are closed. The pressures of both regulating valves 12 and 19 are set to a predetermined pressure. First, as a preparatory step, after putting a predetermined amount of sand in the hopper 4, the first and second valves 3 and 8 are opened and water is sprinkled from the water sprinkling nozzle 6. Then, the sand flows into the tank 7 through the inflow port 7i, and the sand is precipitated in the tank 7.

Next, when a predetermined amount of sand and water are supplied into the tank 7 and, for example, water overflows from the hopper 4, the first and second valves 3 and 8 are closed. Then, when the start button of the operation unit 24 is operated and activated, the control unit 25 causes the pump 10 to operate.
Since the compressor 16 is operated, the third valve 18 is opened to supply the compressed air of the compressor 16 to the compressed air supply pipe 17. At this time, the water pressurized by the pump 10 is being supplied to the second solenoid valve 11.

With the preparation thus prepared, the operation unit 2
When the work button of No. 4 is operated to perform sandblasting, the control unit 25 opens the first, second and fourth electromagnetic valves 9, 11 and 21, so that the tank 7 is adjusted in accordance with the adjustment state of the flow rate adjusting valve 14. Since the amount of water supplied to the third water supply pipe 2C and the amount of water supplied to the third water supply pipe 2C are determined, the pressure in the tank 7 is kept constant by the pressure of the water pressure adjusting valve 12, and sand and water flow due to the pressure. It flows out from the outlet 7o.

Therefore, the sand mixed water in which the proportion of sand is adjusted according to the amount of water from the third water supply pipe 2C is supplied to the outflow side of the first solenoid valve 9. The sand ratio of the sand-mixed water decreases as the amount of water from the third water supply pipe 2C increases.
It increases as the amount of water from the water supply pipe 2C decreases. Further, since the sand mixed water supplied to the outflow side of the first solenoid valve 9 is sent to the nozzle 23 inside the pressure-resistant hose 22 by compressed air, the discharge state is adjusted by operating the nozzle 23 and the ratio of sand is To confirm.

If the proportion of sand is small, the operating portion 2
Each time the increase button of No. 4 is operated, the control unit 25 controls the flow rate adjusting valve 14 to reduce the amount of water supplied to the third water supply pipe 2C. Therefore, by operating the increase button of the operation unit 24, the proportion of sand Can be increased. If the proportion of sand is large, the control unit 25 controls the flow rate adjusting valve 14 to increase the amount of water supplied to the third water supply pipe 2C each time the reduction button of the operation unit 24 is operated. The proportion of sand can be reduced by operating the weight reduction button.

Next, after adjusting the sand ratio of the sand mixed water and performing sandblasting, when the standby state button of the operating section 24 is operated to end the sandblasting, the control section 25 causes the first, second, Since the fourth solenoid valves 9, 11 and 21 are closed, the above-mentioned ready state is achieved. And
When sandblasting is performed again, sandblasting can be performed by repeating the above operation.

After the sand blasting is finished, when the cleaning button of the operation unit 24 is operated to perform the cleaning for discharging the sand remaining in the pressure resistant hose 22 from the above-mentioned ready state, the control unit 25 causes the third unit to operate. And the fourth solenoid valve 1
Since 5, 21 are opened, compressed air is supplied to the compressed air supply pipe 17 and water is supplied to the compressed air supply pipe 17 from the fourth water supply pipe 2D, so that the water from the fourth water supply pipe 2D is Nozzle 2 inside pressure hose 22 by compressed air
Sent to 3 and released.

[0021] Then, the control unit 25, after the third solenoid valve 15 by closing to discharge water in the pressure hose 23 after the Tsu predetermined time Magyo water supply and compressed air supply described above, the fourth
The electromagnetic valve 21 is closed to stop the pump 10 and the compressor 16, and the control is ended. After this,
The third valve 18 is closed. Therefore, the pressure resistant hose 2
Cleaning can be performed to discharge the sand remaining in 2.

As described above, according to the embodiment of the present invention, since the sand is supplied from the tank 7 by the pressure of water, wet sand can be used and the sand is well wet. Therefore, even if the sand is discharged from the nozzle 23, the sand does not scatter outside the working range. Further, since wet sand can be used, the recovered sand can be reused, which is economical.
And, since there is sand in the water, the sand can be made to flow smoothly due to the fluidity of the water.

Further, since the ratio of sand and water can be changed by the flow rate adjusting valve 14 , the strength of sandblast can be adjusted steplessly. In addition, the nozzle 2
The sand that passes through No. 3 has a good fluidity due to water and wear resistance to the nozzle 23 is reduced, so that the life of the nozzle 23 is extended.

Although the above-mentioned first, second and third valves 3, 8 and 18 are of the manual type, these are also control section 2
The solenoid valve that can be controlled by 5 can be configured to be fully automated.

[0025]

As described above, according to the present invention, since the sand is supplied from the tank by the pressure of water, wet sand can be used and the sand is well wetted.
Even if it is discharged from the nozzle, the sand will not scatter outside the working range. Further, since wet sand can be used, the recovered sand can be reused, which is economical.

Since there is sand in the water, the sand can be made to flow smoothly due to the fluidity of the water. Further, the flow rate adjusting valve 14 is used to change the ratio of sand and water.
Because it is possible to change the strength of sandblasting steplessly
Can be adjusted. In addition , since the sand that passes through the nozzle has good flowability due to water and wear resistance to the nozzle is reduced, the life of the nozzle is extended.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a sandblasting apparatus that is an embodiment of the present invention.

[Explanation of symbols]

2B Second water supply pipe 2C Third water supply pipe 7 Tank 7i Inlet 7o Outlet 8 Second valve 9 First solenoid valve 10 Pump 14 Flow rate adjusting valve 16 Compressor 17 Compressed air supply pipe 22 Pressure hose 23 Nozzle

Claims (1)

[Claims] 1. A pressurizing water supply source for supplying pressurized water, an inlet and an outlet, and an opening and closing for opening and closing the inlet.
A valve is provided and the inlet is closed by the on-off valve.
The pressurized water from the pressurized water supply source through the pressurized water supply pipe.
Is supplied, the sand stored with water from the outlet
Of the tank, a supply valve provided at the outlet of the tank for opening and closing the flow path, a flow rate adjusting valve provided in the pressurized water supply pipe , one end of which is connected to the flow rate adjusting valve, and the other end of which is With the outlet
Bypass water supply pipe connected between the supply valve and compressed air to the outflow side of the supply valve via a compressed air supply pipe
A sandblasting device comprising: a compressed air supply source for supplying a compressed air supply source; and a pressure resistant hose having one end connected to a connection point between the compressed air supply pipe and the supply valve and a nozzle connected to the other end.