JPS6020148B2 - Self-propelled centrifugal projection device - Google Patents

Description

Detailed Description of the Invention The present invention provides a frame in which a centrifugal projection unit is fixed, is provided with an electromagnet, is movable by a freely drivable aura, and is a closed projectile circulation path having a projectile refining mechanism. for large-area workpieces, especially the external surfaces of ships, with
This invention relates to a self-propelled centrifugal projection device.

Suspended on a rope, moved vertically by the rope and horizontally by a freely drivable roller,
Centrifugal projection devices of the above-mentioned type are known in which the holding force of the electromagnet serves only to ensure a sufficient sealing of the projection chamber.

The closed shot material circulation path of such conventional devices includes a mechanically actuated bucket conveyor surrounding the invera in a circular manner, from which the shot material is simultaneously subjected to the purifying action of an air flow. However, V is supplied to the invera by gravity. Therefore, if the subject surface is extremely oblique, especially if it is oblique inward from the top to the bottom, this type of device will
It's no longer useful.

This is because the shot material raised by the bucket conveyor will not fall into the feed funnel of the invera, and the rope suspension system cannot be used. For example, on ships, in addition to vertical or slightly sloped surfaces,
Since it also has a horizontal surface that must be abraded from below, conventional equipment using a rope suspension system and a mechanical blasting material feeder cannot be used to abrade the entire hull.

The object of the present invention is to provide a compact self-propelled centrifugal projection device that can be used not only on vertical surfaces and complicated slopes, but also on strongly sloped surfaces and horizontal surfaces that require sanding from below, regardless of the hanging layer. It is about providing.

The gist of the self-propelled centrifugal projection device of the present application is that an electromagnet having a holding force greater than the weight of the main body and a drive roller in which at least one of a plurality of drive rollers can be steered are attached to a frame, and a The storage tank is a pneumatic conveyance system with a rotation joint in the circulation path of the shot material so that it is always positioned below the shot material and particle separation device by gravity. Alternatively, it may be configured to be in close contact with a horizontal surface and movable in all directions.

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

The far-D projection device 1 shown in FIGS. 1 to 3 includes a freely movable frame 2 and a centrifugal projection unit 3 fixed to the frame 2.
and a part 4 for storing and refining the shot material, which is arranged on the frame 2 so as to be swingable relative to the far zero projection unit 3.

Three rubber-coated rollers 5 are arranged in a triangular shape on the frame 2, one of which is connected to a control drive mechanism 6 (
Preferably, the steering can be controlled by a spindle drive device or a worm drive device driven by an electric motor.

Each of the three loaves 5 can be driven by an electric motor 7 with a reduction gear mechanism 8, but in this case it is particularly preferable to use an electric motor with a built-in brake so as to allow rapid reversal operation.

An electromagnet 10 is fixed to the frame 2 by a holder 9, and by arranging it in a triangular shape within the range of the roller 5, an appropriate holding force distribution can be obtained with respect to the weight D of the device of the present invention.

The electromagnet 10 has a holding force large enough to hold the entire centrifugal projection device 1 in a suspended state on the workpiece surface 11, which is a horizontal surface to be polished from below the workpiece. However, for safety reasons, it is desirable to select this holding force to be 2 to 4 times the maximum weight of the traveling type far-D projection device 1. At this time, the heat generated by the electromagnet 10' is absorbed by a closed cooling water circulation path having a cooling water tank 12 and a cooling water pump 13 fixed to the frame 2. On the other hand, the centrifugal projection device
In order to achieve a sufficiently large acceleration when self-propelled upward on the workpiece, the coefficient of friction between the roller 5 and the workpiece surface 11 must be at least 0.4, and the holding force of the electromagnet 10 must be requires a holding force approximately six times the maximum weight of the centrifugal projection device 1.

However, in order to keep the strength of the electromagnet 10 within an economically reasonable range, if the holding force of the electromagnet 10 is set to a holding force equivalent to four times the maximum weight of the centrifugal projection device 1, the rubber coating of the roller 5 can be It is necessary to properly mix the rubber and increase the coefficient of friction to about 0.6. In addition, in consideration of non-flatness and protrusions (for example, rivets) on the workpiece surface 11, a gap 44 of one gap is set between the surface and the box magnet 10, so that the electromagnet 10 It is arranged so that it does not come into contact with the object surface 11.

Further, the centrifugal projection unit 3 has a projection chamber 15 and an inflator 4 driven by a drive motor 16, and at one end of the projection chamber 15, a sector 18 formed by the flow of the projection material from the invera 14 is provided. Corresponding to this, an opening 17 is provided which is long in the direction transverse to the running direction.

Further, an elastic sealing member 19 made of rubber or the like is attached to the peripheral edge of the opening 17 to seal the projection chamber 15 and the surface 11 of the workpiece to be processed. Therefore, the workpiece surface 1
The particles 34 that have been scraped off from the projecting material 33 and the workpiece surface 11 that have collided with the workpiece surface 11 are not ejected to the outside from between the workpiece surface 11 and the projection chamber 15, but are dropped into the projection chamber 15 due to the collision action or the falling action due to its own weight. (Fig. 4). A rotating joint 21 having a rotating shaft 22 parallel to the workpiece surface 11 is provided at the end of the camphor tree collection chamber 20 configured in a wedge shape. A pivotable part 4 of is rotatably mounted. In the illustrated embodiment, the pivotable part 4 is
A separator 23 (preferably a wind separator) fixed to a rotary joint 21 and a tank 24 fixed below the separator 23
, a cyclone 25 which is arranged in parallel to the separator 23 and separates the particles 34, and a tank 26 which is connected to the cyclone 25 and stores the particles 34.

Further, the cyclone 25 is connected to the separator 2 by means of a holder 27 so that both tanks 24 and 26 are parallel to each other.
It is fixed at 3. In addition, the tank 24 and the separator 23
Alternatively, only the tank 24 can be attached to the separator 23 which is fixed to the collection chamber 2, and the cyclone 25 and the tank 26 are fixed to claim 2. It is also possible to have a configuration. FIG. 6 shows an enlarged cross-sectional view of the rotary joint 21,
As shown in the figure, this rotary joint 21 consists of a fan-shaped tube section 28 welded to the bottle collecting chamber 201, a semicircular receiving section 29 welded to the separator 23, and a tube section 28 disposed at both ends of the section 29. Number 30
It consists of (Figure 1).

Gates 31 and 32 are formed in the guard member 28 and the receiving portion 29, respectively, so as to always form a flow path for the shot material 33 even when the separator 23 rotates. Moreover, the invera 14 is also configured as a ventilator that sucks the blasting material 33, and the necessary negative pressure is created by a ventilating blade attached to the outside of the blasting blade and bent outward.

In this case, the projection chamber 15 is configured as a helical housing so that the air sucked in by the negative pressure can be returned to the high pressure side. That is, the negative pressure side of the projection chamber 15 is connected to the projection material tank 24 by a flexible suction pipe 35, and the high pressure side of the projection chamber 15 is connected to the lower end of the separator 23 by a flexible high pressure pipe 36. It is connected to.

Further, the separator 23 is connected to the cyclone 25 by a fixed pipe line 37 below the rotary joint 21. On the other hand, a ventilator 38 driven by the drive motor 16 via a belt transmission mechanism 39 is arranged in the frame 2 parallel to the drive motor 16, and is connected to another belt transmission mechanism 4, a cooling water pump 13 to drive.

A filter 41 is fixed to the outlet side of the ventilator 38, which is connected to the cyclone 25 via a flexible conduit 42. It should be noted that a configuration in which the ventilator 38 with or without the filter 41 is directly fixed to the cyclone 26 is also possible, and in this case, a separate ventilator drive device is required. The maneuverable conduit 42 can be made unnecessary. In addition, the workpiece surface 11
The apparatus of the present invention has all the equipment necessary for the abrasive processing and the refining and storage of the blasting material 33 and particles 34 arranged in the frame 2. It is equipped with

Next, the operation of the device of the present application will be explained.

After the centrifugal projection device 1 is transported to the workpiece surface 11 (for example, the wall of a ship) to be polished using a lifting device (for example, a crane), if the electromagnet 10 is turned on, the centrifugal projection device 1 , is held on the surface 11 by the holding force of the electromagnet 10, and can be moved along the surface 11 by the freely drivable roller 5. From this state, the remotely controllable roller 5
By operating the control drive device 6 of the present invention device 1
The workpiece surface 11 can be polished while being moved to an arbitrary location. That is, as can be seen from FIGS. 4 and 5, when the drive motor 16 is turned on, the shot material 33 is sucked out of the tank 24 by the inflator 14, which also serves as a ventilator, and the shot material 33 is sucked out of the tank 24 by the projecting blade', thereby discharging the workpiece to be treated. It is projected obliquely to the surface 11.

In this case, the fan shape 18 formed by the flow of the shot material is
It also spreads in the lateral direction with respect to the running direction, and the surface to be treated 11 corresponding to the range of this spread is subjected to the polishing stripe treatment. The shot material 33 projected onto the workpiece surface 11 enters the collection chamber 2 together with the particles 34 scraped off from the workpiece surface 11, and then, due to the action of gravity, the rotary joint 21 opens □31, 3.
2 and falls into the separator 23.

On the other hand, high-pressure air generated by the ventilator action of the invera 14 is introduced into the separator 23 through the high-pressure pipe 36, and the scraped particles 34 are separated from the blast material 33 by this air flow.

Furthermore, the shot material 33 from which the particles 34 have been separated is transferred to a separator 2
The particles 34 that fall under their own weight into a tank 24 fixed to a tank 3 and are scraped off are sent into a cyclone 25 through a pipe 37 by a high-pressure air flow. Particles 34 that reach the cyclone 25 are separated from the air stream and fall into a tank 26 connected to the cyclone 25. Furthermore, Benchley Yu 38
Since the air sucked from the cyclone 25 is further purified within the fine filter 41, it is released into the atmosphere in a clean state. In this way, the separator 23 is
By mounting the cyclone 25 in parallel to the separator 23, the purification of the blast material and the separation of the particles 34 can take place in a satisfactory manner in all operating positions of the centrifugal blasting device 1. .

The center of gravity of the above-mentioned pivotable portion 4 is, with respect to the pivot axis 22,
The portion 4 is selected so as to take a position within the fall range of the collided projectile material 33. Therefore, the treated surface 1 of the workpiece
1 is vertical, the center of gravity 43 of the tanks 24, 26 is approximately parallel to the workpiece surface 11 (Fig. 4).
.

Furthermore, if the workpiece surface 11 is horizontal and should be processed from below, the center of gravity line 43 will be approximately perpendicular to the workpiece surface 11. That is, the portion 4 pivots about 90° around the pivoting pith 22 (FIG. 5). In this way, the tanks 24, 26 can be rotated approximately 900 degrees depending on the direction of the workpiece surface 11, so that it is also possible to treat workpiece surfaces 11 that are inclined inward from the bottom to the top. Due to such rotatability, the separator 23 and the cyclone 25 are automatically displaced by their own weight to positions where they can fully function in various operating positions of the far-of-exploitation device 1, and the separator 23 and the cyclone 25 are automatically displaced by their own weight to positions where they can fully function at various operating positions of the far-of-spraying device 1, and the The particles 34 can fall into the tanks 24,26. Furthermore, by the pneumatic conveyance method of the projection material 33 by the invera 14,
Regardless of the positions of the invera 14 and the tank 24 for the shot material 33, the complete functionality of the closed shot material circulation path can be ensured. That is, the apparatus according to the present invention can perform cleaning operations from below on horizontal surfaces in addition to cleaning vertical and inclined surfaces, and is particularly effective when cleaning outer walls of ships and the like.

Moreover, the pneumatic conveyance method of the projectile material 33 allows the device to be lightweight, and as a result, the electromagnet for holding the device can be used economically.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is an overall front view, Fig. 2 is a sectional view taken along the low D line in Fig. 1, and Fig. 3 is a side view seen from direction A in Fig. 1. , FIG. 4 is a partial sectional view taken along the line W-W in FIG. 1, showing the state of the injection treatment on the vertical surface of the workpiece, and FIG. 5 is a portion corresponding to FIG. 4 showing the state of the injection treatment on the horizontal surface. 6 is an enlarged cross-sectional view of the rotating link of FIG. 4; FIG. 2...Frame, 3...Centrifugal projection unit, 5...Drive roller, 10...Electromagnet, 2
1... Rotating joint, 23... Separation device,
24...Tank, 33...Projection material, 34.
... Particles, 35 ... Sacrificial suction conduit, 3
6...Visible I high pressure pipe. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1 A centrifugal projection unit in which a projection chamber with a built-in impeller and a collection chamber are successively formed, and multiple drive rollers including electromagnets and steerable rollers are attached to the frame, and a storage tank for the projection material is moved by gravity. The tank is swingably connected to the collection chamber so as to be always located below the projection unit, and the tank and the projectile introduction part of the impeller, which is always located above the tank, are connected to a flexible conduit. A self-propelled centrifugal projection device characterized in that the projecting material in the tank can be supplied to the impeller by pneumatic conveyance by communicating with the impeller.