JP3178039U - Sharpening device - Google Patents

Abstract

The present invention provides a scouring apparatus that does not require a water supply hose and that can be transported to a nozzle after mixing scouring material and water in compressed air without using a power pump.

An air supply pipe (2) sends compressed air from a compressed air source (4) to a blast hose (3). The container 13 accommodates the scouring material a1 in the internal space to which the compressed air is supplied. The scouring material a1 is dropped on the air supply pipe 2 disposed under the container 13 and mixed with the compressed air. A pump 18 is provided for supplying water e1 to the air supply pipe 2 upstream of the drop position. The pump 18 is a pneumatically driven pump that is driven by compressed air and applies a higher pressure than the compressed air.
[Selection] Figure 1

Description

The present invention relates to a cleaning device that sprays mist-like water from a nozzle together with a polishing material to suppress scattering of dust into the atmosphere.

For example, Patent Documents 1 and 2 disclose a polishing apparatus that introduces water into a nozzle of compressed air mixed with the abrasive and adds water to the abrasive that is ejected from the nozzle. The sprayed polishing material is surrounded by water and collides with the surface to be processed, and the cleaning dust is prevented from being scattered in the atmosphere.
Further, for example, Patent Literature 3 discloses a polishing device that guides a polishing material to a nozzle in a state of being mixed with water in advance and jets the nozzle.

JP-A-11-291171 JP-A-10-291116 JP 2000-52251 A

In the scouring apparatus of Patent Documents 1 and 2, since water is supplied at the position of the nozzle, it is necessary to guide a water supply hose for guiding water to the nozzle along the air supply passage. . In addition, an electric pump for sending water from the water tank to the nozzle is required, and an electric system for driving the pump is also required. An air-driven pump (for example, a diaphragm pump that operates with pressure air) may be used. However, in order to send water to the nozzle tip, it is necessary to consider the pressure loss, and the diaphragm pump is driven. Requires a large amount of pressurized air.

  On the other hand, in the scouring device of Patent Document 3, the water supply hose in Patent Documents 1 and 2 is not necessary, and immediately after the scouring material is mixed with the compressed air, the water passes under the water tank and is caused by gravity. Since it is added, there is an advantage that no power is required to supply water. However, since water is added to the abrasive that is being accelerated by the compressed air, the portion where the water is mixed is exposed to the erosion of the abrasive. In Patent Document 3, as a second embodiment, an example is shown in which the water in the water tank is guided to the vicinity of the nozzle by using gravity and then mixed with the abrasive. In this case, the height of the nozzle must be made lower than the water level of the water tank, and if it is assumed to be used at a high place, an electric pump or the like must be applied as in Patent Documents 1 and 2.

Although there is a known polishing apparatus in which the abrasive is mixed with water in advance and sent out by compressed air, a soluble abrasive cannot be used.
An object of the present invention is to provide a polishing apparatus that does not require a water supply hose and that can be transported to a nozzle after mixing the cleaning material and water with compressed air without using an electric pump. .

A polishing apparatus according to the present invention is a container that accommodates an air supply pipe that sends compressed air from a compressed air source to a blast hose, an abrasive material in an internal space, and the compressed air is supplied to the internal space. A container for dropping the polishing material in the internal space at a position midway along the length of the air supply pipe disposed under the container, and the air supply pipe on the upstream side closer to the compressed air source than the drop position. A pump for supplying water, comprising a pneumatically driven pump that is driven by the compressed air and applies a higher pressure than the compressed air.

According to the present invention, even if a water supply hose for supplying water into the nozzle is not guided along the air supply passage to the nozzle, the water supplied by the water supply is supplied to the nozzle through the air supply passage. Become so. Moreover, in order to supply water, the compressed air is used and an electric system is not required.
In addition, the compressed air in a state where water is mixed is desired to have a dropping port for the abrasive, but since a reciprocating pump is used, the mixing of water with the compressed air is intermittent in time series. The water does not soak into the polishing material in the state before the fall from the drop port.

1 is an overall system diagram of a polishing apparatus according to the present embodiment. It is a perspective view of a scouring device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, the scouring apparatus 1 of the embodiment includes an air supply passage unit 100, a scouring material supply unit 200, and a water supply unit 300.
The air supply passage unit 100 includes a drain separator 10 and an air supply pipe 2. The compressed air from the compressed air source 4 is supplied to the air reservoir 10 a of the drain separator 10 through the supply valve 5 and the inlet pipe 6. A drain valve 7 that operates automatically or manually for discharging drain in the compressed air is provided at the lower part of the air reservoir 10a.

A start end 2 a of the air supply pipe 2 is communicated with the outlet pipe 8 of the air reservoir 1 a through a pressurizing valve 9. The air supply pipe 2 is formed of a metal pipe, and an air opening / closing valve 11 is interposed in the middle of the length, and the end 2b is connected to the start of a flexible blast hose 3 made of wear-resistant rubber or the like. The air on-off valve 11 is a pneumatic automatic valve whose opening / closing operation is performed by air power. A nozzle 12 is coupled to the tip of the blast hose 3.

The scouring material supply unit 200 has a container 13 for storing the scouring material a1 made of particles such as sand, and an outlet 13a formed at the lowermost part of the container 13 extended through the scouring material opening / closing valve 14 to send it. It communicates with the trachea 2 in a T-shaped intersection. The abrasive material opening / closing valve 14 is a pneumatic automatic valve whose opening / closing operation is performed by air power. The container 13 is formed so that the scouring material inlet 13b can be airtightly closed at the upper part, and the lower part of the container 13 is flown downward as the squeezed material a1 accommodated therein as a thin hopper. It is facilitating. A pressurizing air passage 16 is branched from the air supply pipe 2 downstream of the pressurizing valve 9, and the compressed air reaching the drain separator 10 is supplied into the container 13 by opening the pressurizing valve 8.

When the scouring material a1 is put into the container 13 and the scouring material on / off valve 14 is opened with the charging port 13b closed, the scouring material a1 in the container 13 receives air pressure in the container 13. As a result, the internal pressure of the container 13 and the internal pressure of the air supply pipe 2 become the same, and fall by gravity into the terminal end 2 b of the air supply pipe 2 through the scouring material on / off valve 14.

The water supply unit 300 includes a water tank 17, a pneumatically driven pump 18, a water supply pipe 19, and a drive air pipe 20 for driving the pump 18. By using the compressed air as a power source of the pump 18, the scouring apparatus 1 uses the compressed air as a single power source. The water tank 17 is made of plastic or the like. As the pump 18, a reciprocating pump that sucks and discharges water by a reciprocating motion of a plunger or a piston can be used. The pump 18 according to the present embodiment includes a drive unit 18a and a pump unit 18b, and the drive unit 18a reciprocates the plunger with the compressed air from the compressed air source 4. The pump unit 18b alternately performs a cycle for taking water from the water tank 17 and a cycle for pushing water into the water supply line 19 by reciprocating driving of the plunger of the drive unit 18a. By using a reciprocating pump, pressure is applied only when water is pushed out into the water supply line 19, and when water is sucked out from the water tank 17, intermittent pressure is applied to the water supply line 19 in a non-pressure state. Therefore, the water supply of the pump part 18b also becomes intermittent.

The pressure applied when the pump 18 extrudes water is about 0.1 to 0.3 Mpa higher than the pressure of the compressed air (set to about 0.7 MPa). This is because if the pressure of the pump 18 is further increased, there is a limit to the amount ejected from the nozzle 12, so that the pressure in the blast hose 3 increases and water cannot be stably delivered to the water supply pipe 19.

The water supply line 19 includes a suction line 19a and a discharge line 19b. The suction line 19a connects the water outlet of the water tank 17 and the suction port of the pump part 18b, and an opening / closing valve 21 is provided on the side closer to the water tank 17. The discharge pipe 19b communicates the discharge port of the pump unit 18b and the water supply port 2c of the air supply pipe 2, and is provided with a check valve 22 and a manually operated water amount adjusting valve 23 in the middle of the path. . The water supply port 2c is set on the upstream side of the position where the polishing material a1 in the container 13 is supplied into the air supply pipe 2 in the air supply pipe 2 (the end 2b of the air supply pipe 2).

The check valve 22 causes the air in the air supply pipe 2 to reciprocate when the pressure in the air supply pipe 2 exceeds the pressure in the water supply pipe 19 when the pump 18 intermittently sends out the water e1. Blocks into the inside.

Since the water supply unit 300 intermittently supplies the water e1 into the air supply pipe 2, during the period in which the scouring material a1 is continuously supplied, the dropping port of the scouring material a1 (the end 2b of the end of the air supply pipe 2) ), The compressed air in a state where the water e1 exists and the compressed air in a state where the water e1 does not exist alternately flow in time series. For this reason, even if the water e1 in the air supply pipe 2 tries to enter the container 13 from the drop port due to capillary action, the compressed air that is not mixed with the water e1 flows at the next moment, so that it is in a state before the drop. The abrasive can be maintained in a dry state, and the fluidity of the abrasive a1 is prevented from being impaired.

The drive air pipe 20 is branched from the air supply pipe 2 between the pressurizing valve 9 and the air opening / closing valve 11 and connected to the air inlet of the drive unit 18a. The filter 24, the pressure adjusting valve 25, and the air are connected in the middle of the length. An actuator type driving air valve 26 that is opened and closed by power is provided.
The air on / off valve 11, the scouring material on / off valve 14, and the driving air valve 26 are opened / closed via the pneumatic control circuit 28 by swinging the operation lever 27 a of the remote control valve 27 attached to the nozzle 12. It is to be activated.

The pneumatic control circuit 28 includes first to fifth control air ducts 28a, 28b, 28c, 28d, 28e, and first to third control valves 29a, 29b, 29c. The first control air pipe 28 a is branched from the air supply pipe 2 between the pressurizing valve 9 and the air opening / closing valve 11, and is coupled to each of the first to third control valves 29 a, 29 b, 29 c and the remote control valve 27. Then, the compressed air in the air supply pipe 2 is supplied to the first to third control valves 29a, 29b, 29c and the remote control valve 27. A drain catcher 30 and a filter 31 are interposed in the middle of the length of the first control air pipe 28a. The second control air pipe 28b connects the remote control valve 27 and the valve operation part b2 of the first control valve 29a so that the compressed air flows between them. The third control air pipe 28c couples the valve operating part of the scouring material on / off valve 14, the first control valve 29a, and the timer function part b1 of the second control valve 29b, and the fourth control air pipe The path 28d couples the second control valve 29b and the valve operating part b4 of the third control valve 29c. The fifth control air pipe 28e connects the air on-off valve 11 and the third control valve 29c, and the sixth control air pipe 28f connects the drive air valve 26 and the first control valve 29a. .

When the operating lever 27a of the remote control valve 27 is swung to the open side (abrasion work start side) while the compressed air from the compressed air source 4 is supplied to the air supply pipe 2, the remote control valve 27 Is switched to the open state, and the compressed air in the air supply pipe 2 is supplied to the valve operating portion b2 of the first control valve 29a through the first control air pipe 28a, the remote control valve 27, and the second control air pipe 28b. Is done. As a result, the passage direction of the first control valve 29a is switched, and until that time, the compressed air is supplied through the first control air pipe 28a, the first control valve 29a and the sixth control air pipe 28f, and the first control valve 29a is closed. The driving air valve 26 in a state is opened by discharging the compressed air to the atmosphere side. On the other hand, the compressed air in the air supply pipe 2 is supplied to the valve operating portion of the scouring material on / off valve 14 through the first control air pipe 28a, the first control valve 29a, and the third control air pipe 28c, and the scouring is performed. The material opening / closing valve 14 is opened.

When compressed air is supplied to the operation part of the scouring material on / off valve 14 through the third control air conduit 28c, the compressed air is also supplied to the timer function part b1 of the second control valve 29b. When the supply of the compressed air to the timer function unit b1 is continued for a time corresponding to the air flow rate preset in the timer function unit b1, the second control valve 29b switches the passage connection direction by the compressed air. It is done. As a result, the third control valve 29c supplies the compressed air in the air supply pipe 2 to the valve operating portion b4 through the first control air pipe 28a, the second control valve 29b, and the fourth control air pipe 28d, and the passage connection direction. Can be switched. The air on-off valve 11 which has been closed until then is supplied with compressed air in the air supply pipe 2 to the valve operating portion of the first control air pipe 28a, the third control valve 29c and the fifth control air pipe. It is supplied through the path 28e and opened.

In relation to this opening, the operating lever 27a of the remote control valve 27 is swung to the closed side (the scouring work stop side) under the condition that the compressed air from the compressed air source 4 is supplied into the air supply pipe 2. Then, the remote control valve 27 is switched to the original closed state, and the compressed air existing inside the second control air conduit 28b and the valve operation part b2 of the first control valve 29a is remotely operated. It is discharged from the valve 27 to the atmosphere side. As a result, the first control valve 29a switches the passage connection direction to the initial state, and the drive air valve 26 draws compressed air through the first control air line 28a, the first control valve 29a and the sixth control air line 28f. It is supplied to the actuator b6 which is a valve operating unit and automatically enters a closed state. On the other hand, the compressed air existing inside the valve operating portion of the scouring material on / off valve 14 and the third control air pipe 28c is discharged to the atmosphere side through the first control valve 29a, and the scouring material on / off valve 14 is closed. To do.

When the compressed air in the third control air conduit 28c flows out from the first control valve 29a to the atmosphere side, the compressed air existing inside the timer function part b1 of the second control valve 29b is also third. It flows out into the control air pipe 28c. When the outflow of the compressed air from the timer function part b1 is continued for a time related to a preset air flow rate, the passage connection direction of the second control valve 29b is switched to the initial state. As a result, the compressed air existing inside the fourth control air conduit 28d and inside the valve operating portion b4 of the third control valve 29c is discharged from the second control valve 29b to the atmosphere side, and the third control valve The passage connection direction of 29c is switched to the initial state. Thereafter, the compressed air existing inside the fifth control air pipe 28e and inside the valve operating portion of the air on-off valve 11 is discharged from the third control valve 29c to the atmosphere side, and the air on-off valve 11 Closed.

In FIG. 1, the inner side of the square frame indicated by the alternate long and short dash line c1 is disposed on the container 13 which is structured so as to be self-supporting by the leg member 13c as shown in FIG. The source 4 and the air supply line 4a extending therefrom, the water tank 17 and the suction pipe 19a extending therefrom, the blast hose 3 and the nozzle 12 attached to the tip thereof, as well as the remote control valve 27 and this The first and second control air pipes 28a and 28b are used in a state of being separated from the container 13 or extended. Each member inside the square frame indicated by another one-dot chain line c <b> 2 is disposed in the control panel 13 d in FIG. 2 fixed to the container 13.

When wet cleaning is performed by the scouring device 1, a sand or other scouring material a <b> 1 is introduced into the container 13 in an airtight manner, and water e <b> 1 is accommodated in the water tank 17 to prevent rust as necessary. Mix the agent. Then, the supply valve 5, the pressurizing valve 9, and the on-off valve 21 are opened, and the degree of opening of the water amount adjusting valve 23 is set in advance by a manual handle operation. When the nozzle 12 is positioned at the location where the scouring is performed and the remote control valve 27 is operated toward the scouring operation start side, the scouring material on / off valve 14 and the driving air valve 26 are opened at substantially the same time. The scavenging material a1 is continuously pushed into the end 2b of the air feeding pipe 2 by the compressed air in the container 13. Water e1 in the water tank 17 is intermittently supplied by the pump 18 to the upstream side of the supply position of the polishing material a1 of the air supply pipe 2.

The scouring material on / off valve 14, the drive air valve 26 and the air on / off valve 11 are opened, and the compressed air from the compressed air source 4 flows out from the air on / off valve 11 toward the downstream side in the air supply pipe 2. Thereby, the water e1 supplied from the water supply unit 300 flows while being misted by the compressed air flow in the air supply pipe 2. The polishing material a1 supplied by gravity drop at the end of the air pipe 2 is also accelerated by the compressed air, flows in the blast hose 3 toward the front side, and is ejected from the nozzle 12.

Water is added to the compressed air in advance, and since the blast hose 3 can be connected immediately after adding the scouring material a1 at the end of the air supply tube 2, the blast material by the compressed air in the air supply tube 2 The acceleration of a1 is limited and it is possible to avoid exposing the air pipe 2 to wear.

At the end of the blasting operation, the remote control valve 27 is swung to the ending side of the blasting operation, the scouring material opening / closing valve 14 and the driving air valve 26 are closed, and the scouring material a1 is supplied into the air supply pipe 2. Stopped. Similarly, water supply into the air pipe 2 by the water supply unit 300 is stopped. Thereafter, the air on / off valve 11 is closed with a delay due to the action of the timer function part b1, and the supply of compressed air from the air on / off valve 11 is stopped. Therefore, the flow of the compressed air that continues to be supplied until the air on-off valve 11 is closed is supplied to the scouring material a1 still remaining in the air supply pipe 2 or the blast hose 3 when the scouring on-off valve 14 is closed. It is carried out by. Then, each part is returned to the state before the start of work as needed.

DESCRIPTION OF SYMBOLS 100 Air supply passage part 200 Abrasive material supply part 300 Water supply part 1 Abrasive device 2 Air supply pipe 3 Blast hose 12 Nozzle 13 Container 18 Pump 22 Check valve

Claims (4)

An air pipe that sends compressed air from a compressed air source to a blast hose;
A cleaning material is accommodated in an internal space, and the compressed air is supplied to the internal space, and the internal space is cleaned at a position halfway along the length of the air supply pipe disposed below the container. A container to drop the material,
A pump for supplying water to the air supply pipe on the upstream side closer to the compressed air source than the drop position, driven by the compressed air, and a pneumatically driven pump that applies a higher pressure than the compressed air; A polishing apparatus characterized by comprising.
2. The polishing apparatus according to claim 1, wherein the pneumatically driven pump is a reciprocating pump and intermittently applies the pressure to water supplied to the air supply pipe.
When the air pressure of the water supply line exceeds the water discharge pressure of the pump, the air from the water supply line flows into the pump while the pump supplies water to the air supply pipe. 3. A scouring apparatus according to claim 2, further comprising a check valve for regulating.
A cleaning material on-off valve provided in the middle of the path where the scouring material falls to the air supply pipe, a driving air valve that sends compressed air to the pump, and a path through which the pump supplies water to the air feeding pipe And an air on / off valve provided at the position of the air supply pipe upstream, and a timer function that closes the air on / off valve behind the closing of the scouring material on / off valve and the drive air valve when a stop is instructed The polishing apparatus according to claim 1, further comprising a cleaning unit.