FI72907B - ANORDNING FOER RENGOERING AV ARBETSSTYCKETS YTA MED RENGOERINGSPARTIKLAR. - Google Patents

Description

1 72907

The present invention relates to an apparatus for cleaning the surface of a body with cleaning granules, the apparatus comprising , means for attaching the percussion device to the boom, remote controls for moving the percussion device in different directions, means for moving the cleaning granules to the percussion device, means for attaching the open nozzle to the 10 booms, remote control devices for moving the open nozzle with a stem comprising parts, with which the open nozzle is also attached to the boom, or a single thrower örälai-15 te and the open nozzle are attached to the boom with separate arms.

Apparatus exhibiting the above features is described, for example, in U.S. Patent Nos. 4,064,656, 4,139,970, 4,286,417, 4,368,599 and 4,370,836, as well as in GB Patent 1,151,793 and 20 SE Publication No. 395,846.

Most commonly, a percussion wheel device is used to clean large pieces. The percussion devices can be permanently located in a cleaning room, which is then usually an enclosed space. Large pieces are conveyed through the cleaning room by 25 conveyors for cleaning. Cleaning takes place with a percussion device during transport. It is also known to attach a percussion device to the end of a remote-controlled boom. The percussion device is controlled from outside the cleaning room.

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Especially for cleaning straight flat surfaces, the percussion device is effective. However, its disadvantage is its inflexibility. If the part to be cleaned has hollow, rib or beam-like surfaces, there will be easily uncleaned spots in the part. These points must then be patched using e.g.

conventional open nozzle. In a percussion wheel device, only steel granules are usually used in the cleaning granules, while both steel granules and quartz sand can be used in the open nozzle. Since the shotgun device generally uses 10 steel granules as cleaning grains, it can only clean surfaces made of ordinary steel. If the same part also has surfaces made of stainless or acid-resistant steel, they must be cleaned separately, eg with an open nozzle, as such surfaces are usually cleaned with quartz sand.

15 The above method increases labor costs. In addition, the disadvantage of cleaning with a throwing wheel device is that this method of cleaning leaves waste, such as granules and also debris, on the surface to be cleaned. Accordingly, it is also advantageous to connect to the apparatus an open nozzle 20 movable in different directions and associated fastening means, as well as means for transferring the cleaning granules to the open nozzle. This results in more efficient, flexible, versatile and cost-effective equipment. The means for attaching the open nozzle to the boom may form a stem having one or more of the stem portions and simultaneously acting as means for attaching the percussion device to the boom, or the means for attaching the open nozzle to the boom and the means for attaching the percussion device to the boom.

The main tank in this application means the tank 30 of cleaning granules, from which the supply of granules to the percussion device begins. It is usually fixed with respect to the moving parts of the cleaning equipment and is located relatively far from them.

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The bending of the granules from the main tank to the percussion device uses a flexible hose or tube and the transfer aims to avoid compressed air because it is expensive. As a result, the transfer is intended to use only gravity. The transfer by gravity onnis-5 is easily supported when the percussion device is fixed with respect to the main tank, whereby the hose between the main tank and the percussion device is made to descend its entire distance, even if the tank is located as usual, far from the percussion device.

If, instead, as in the present case, the percussion wheel device 10 is movable with respect to fixed structures such as a conventional main tank, the continuous, necessary gravity transfer of the granules to the percussion wheel device produces difficulties because bends are easily created in the transfer hose which prevent continuous transfer. There is no solution to this problem in the above-mentioned publications.

The object of the invention is to provide an apparatus which does not have the above-mentioned drawbacks. According to the invention, this object is achieved by providing an intermediate container for moving the cleaning granules to the sin-20 copier device in connection with the arm.

The invention is based on the realization that the granules need an intermediate container, which must be located in the immediate vicinity of the percussion device and from which the granules can be continuously fed to the percussion device by gravity or mechanically.

25 From the main tank to the intermediate tank can be produced by known technology, e.g.

the so-called. with a compressed air transmitter, periodically introduce a suitable amount of granules at a time so that the continuous supply of granules from the intermediate tank to the casting wheel is not disturbed.

The cleaning granules are transferred from the main tank to the intermediate tank installed between the main tank and the percussion device by a continuously or intermittently bending hose or tube and from the intermediate tank to the percussion device by gravity or mechanical conveyor.

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According to an embodiment of the invention, the arm or part of the arm simultaneously acts as an intermediate container. In this case, the arm is made hollow and this hollow space is arranged to act as an intermediate container.

According to an alternative embodiment of the invention, the intermediate container is mounted inside the arm or part of the arm. In this case, a separate container is installed in the cavity inside the shaft.

The intermediate container can advantageously also be mounted outside the arm or part thereof. It can then be mounted on a percussion wheel-10 device, which in turn is attached to the arm.

The intermediate tank in the arm or part of the arm can advantageously be fitted with a mechanical conveyor for transferring the cleaning granules from the intermediate tank to the throwing wheel device.

The invention will now be described in more detail with reference to the accompanying drawings, in which Figure 1 shows a perspective view of an apparatus according to the invention in use, Figure 2 shows a side and partial view of an embodiment of the invention, Figure 3 shows a side view and a cut arm with arm simultaneously as an intermediate container, Fig. 4 shows a side view and a partial section of another embodiment in which the arm also acts as an intermediate container, Fig. 5 shows a side view and a sectional view of an arm also acting as an intermediate container and with a conveyor for transferring granules from the intermediate container to a casting device. Figure 6 shows a side view of a section through the intermediate container of yet another shaft embodiment, wherein the shaft is an intermediate tanks, Figure 7 shows the same viewed in the direction of arrow in Figure 6, 5 8 shows an embodiment in which the intermediate container is mounted on the arm from the Fig 9 shows the same section VIII VIII in Fig. 8, fig 10 shows a side view of an embodiment in which an intermediate container is mounted on a percussion device.

10 Fig. 11 shows the same in section X-X in Fig. 10.

The apparatus according to Figure 1 comprises a frame structure 1 associated with wall structures 2. The apparatus is located in a closed cleaning room, which also includes the wall structures 2. The cleaning rooms have not been described in detail, but the structure of 15 such is generally known. Boom 3 moves on the frame structure 1. In the case shown, this boom is a so-called a telescopic boom, which can therefore be extended and shortened. This is illustrated by the arrow next to the boom. Furthermore, in the described case, the boom rotates about its longitudinal axis. 20 This operation is also illustrated by an arrow. Attached to the lower end of the boom is a throwing wheel device 8 with an arm 9, which is pivotally articulated to the boom in a manner known per se. Further, an open nozzle 6 is attached to the lower end of the boom by an articulated arm, the parts of which are indicated by the numbers 4 and 5. These reference numerals show the 25 arms 4, 5 in the open position. When the open nozzle is not used, the arm 4, 5 can be folded next to the boom 3. In this position, the parts of the shaft are marked with the numbers 4 ', 5' and the open nozzle with the number 6 'and are indicated by dotted lines. Reference numeral 7 denotes a hose by which cleaning granules, such as quartz sand, are introduced into the open nozzle 6, 6 'by means of air. Reference numeral 10, on the other hand, denotes a hose with which the cleaning granules, such as steel granules, are led to the throwing wheel device 8.

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A structure has been described above in which the means, i.e. the arm 4, 5, for attaching the open nozzle 6 to the boom 3 and the means 9 for attaching the thrust wheel device 8 to the boom 3 are separate from each other. In this case, the percussion device and the open nozzle 5 can be operated completely independently of each other. It is also possible to attach the percussion wheel device 8, e.g. to the same part of the arm 5 as the open nozzle 6. In this case, a simpler structure is obtained. For example, the supply of air to both devices is easier to arrange, as is the control of the devices. This solution 10 is not shown in the drawings, as its implementation is obvious to a person skilled in the art on the basis of Figure 1.

In the structure according to Figure 2, the open nozzle 6 and the throwing wheel device 8 are fixed to the boom 3 on the same arm 18. The arm 18 is a rectangle which is substantially parallelepiped. It has four angle-15 points N1, N2, N3 and N4. Each corner point has a pivot joint. The sides of the parallelogram are parts of the arm 18 and are denoted by reference numerals 19, 20, 21 and 22. The arm 18 is pivotally attached to the boom 3 from the corner point N1. The percussion wheel device is attached to an angle point N2 located diagonally with respect to an angle point N1. It may also be attached to the sides 19 or 22 associated with the corner point N2 or to an extension thereof. The open nozzle 6 is located on the extension 23 of the side 19. The side 19 passes through the corner points N2 and N4. Shot-wheel device is rotated around the corner point Nl of the arrow D, as shown.

'; 25 open nozzles 6 are arranged in the direction of arrow B according to kallistuslii-kb, and the direction of the arrow C, the rotational movement as claimed.

The described means operate as follows: When the open nozzle 6 is used, the parallelogram 18 is in the position shown in solid lines. By turning the side 20 with respect to the side 21, e.g. within the angle 30, the side 19 and its extension 23 and the open nozzle 6 move along a circular path both in the direction of the boom 3 and transversely thereto. The compass as a whole is rotatable around the corner point N1. The percussion device 8 does not prevent the use of the open nozzle 6.

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If the percussion wheel device 8 were used in the position described above, the open nozzle support, i.e. the extension 23 on page 19, would be a serious obstacle to free work. Using the described parallelogram structure 18, it can be turned, by turning the sides 20 and 21 5 sufficiently clockwise, even to the limb position 18 ', which is shown in broken lines. In this position, the extension 23 is no longer in the way when the throwing wheel device 8 is used. In use, the parallelogram 18 ', preferably in the glued position, forms a supporting support arm which is rotated around the corner point N1, e.g. within the angle 10F. All of the above movements are mechanized in known ways. The structure requires as few actuators as possible to move the percussion device and the open nozzle.

The part to be cleaned is marked with the reference number 11 and rests 15 on the transport carriage 12. The transport carriage can be moved on the rails 13 by means of a traction rope or a wire 14. The boom 3 can be moved along the frame structure 1 by means of a traction member 15. The power required for the movements of the equipment is obtained, for example, from the power unit 16, and the equipment can be operated by means of electricity, compressed air or pressurized liquid 20 or a combination thereof. For cleaning, the piece 11 to be cleaned is transferred by a transport trolley 12 to the cleaning room. The operation of the cleaning equipment is controlled from outside the cleaning room by control devices 17.

In the boom solution shown in Figure 1, the arm 9 attached to the percussion device 25 8 can act as an intermediate container according to the invention, whereby the granule supply hose 10 is mounted on the arm 9 at the boom 3 end thereof. In the same way, the arm part 5 can act as an intermediate tank for cleaning granules if the throwing wheel device is attached to the arm part 5. In the solution shown in Figure 2, the arm 18 and preferably the arm part 22 can act as an intermediate tank. an intermediate tank. When the transfer of granules from the intermediate tank to the throwing wheel device is by gravity, the intermediate tank arm or part of the arm must be inclined downwards in the operating position 35 so that the granules flow along the boom 8 72907 to the throwing wheel. In this case, the suction caused by the casting wheel and the vibration of the equipment also contribute to the run-off of the granules. The details of the transfer are not explained in more detail here, as they are within the skill of the art. Specific arm solutions in which the arm associated with the percussion wheel device 8 acts as a granule tank are shown in Figures 3-7. Figure 3 shows in detail a solution suitable for use with both the boom of Figure 1 and Figure 2. Shown here is an arm 25 of a throwing wheel device formed as a hollow container and into which the grain 26 is fed either to a hinge point or otherwise preferably by means of a grain tube (not shown) attached to the upper end of the arm. When the arm 25 is inclined downwards, the granules flow into the throwing wheel. The flow can be stopped by raising the arm upwards, so that the casting wheel no longer receives granules. The arm 25 15 can be adjusted from a straight down position above the horizontal to an upwardly sloping position or even an upward vertical position as required.

Figure 4 shows a modification of the arm solution according to Figure 3, in which the arm 28 of the percussion wheel device is fixed to the boom 3 by means of a lever arm 27. The articulated arm 27 is mounted close to the middle of the arm 28, although it may be adapted to the desired position of the arm as needed. One end of the articulated arm 27 is attached to the boom 3. The other end of the arm 28 of the intermediate tank is connected to a pressure medium driven cylinder. 28 can be set to the desired angle for operation.When the cylinder 29 is operated, its piston pushes the end of the shaft 28 of the percussion device upwards, causing the triangle formed by the shaft 28 and the articulated arm 27 to deform, the farther the cylinder is, the farther between the arms 28 and 30 the vertical one has an arm 28. The cleaning granule is fed, for example, to the end of the arm via a hose 30.

In the solution shown in Fig. 5, a conveyor 31 is connected to the arm 25 for conveying the granules, which conveys the granules along the container 35 to the casting wheel 8. The conveyor 31 rotating around the shafts or support wheels 32 and 33 in the container 9 may be of the coulter conveyor, link chain or the like. This solution has the advantage that the percussion device can be used in a position with the arm pointing upwards. In this case, the vertical movement of the boom 5 may have a smaller dimension, because by turning the arm of the percussion wheel device, the missing height movement can be compensated. Of course, the conveyor also helps the grain to move not only in the upward position but also in the horizontal and downward position. The granules can be introduced into the arm when the conveyor is used from any point on the boom, but of course other practical considerations determine whether the boom 3 side of the container end is used or whether the granules are brought to another location on the arm.

Figures 6 and 7 show a solution in which the arm of the percussion wheel device 15 differs in structure from the arms shown in the previous solutions. In this case, the arm 34 of the throwing wheel device forms an intermediate container directly at the lower end of the boom 3, which can turn independently of the boom 3 if necessary. In this case, the transfer of granules from the intermediate tank to the percussion device always works by 20 gravity because of it. cannot be set separately, for example, to a position in which the flow of granules into the casting wheel would be prevented. This solution is suitable for use when the percussion wheel does not require a large reach, but its operating range is clearly limited. The cleaning granule can be introduced into the tank 34 either through the boom 3 or through a hose (not shown) to the top of the tank 34.

Figures 8 and 9 show a solution in which the intermediate container 38 is mounted outside the arm 35, on top of it. The arm 35, its attachment to the boom and the throwing wheel device 8 are analogous to e.g. the solution shown in Fig. 3. Stem 35 is not just 30 hollow. The cleaning granules are introduced into the intermediate tank 38 by means of a hose 30. Also in this solution, a mechanical conveyor can be placed in the intermediate tank as shown in Fig. 5.

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In Figures 10 and 11, the intermediate tank 39 is mounted on the side wheel device 8, on its side. The percussion wheel device 8 is mounted on the shaft 35 by a shaft 36, as in Fig. 9. The percussion wheel device 8 is driven by a motor 37. The cleaning granules are introduced by a hose 30 from a head-5 tank (not shown in the intermediate tank 39).

The invention can also be implemented in such a way that a separate intermediate container is mounted inside the arm or part of the arm. This embodiment is not shown in the separate figures, as it is analogous to Figures 3-7 and thus can be determined by a person skilled in the art.

Figures 3-11 do not show the structure and other details of the open nozzle, because in all these cases either the construction according to Figure 1 or Figure 2 can be applied to use the open nozzle or also some other construction. Of course, the arm and tank solutions shown in Figures 3-11 are also available in conjunction with percussion wheel equipment only, but are ideally suited for use with both percussion wheel and open nozzle cleaning equipment, such as the combination of thrust wheel 8 and shaft 9 in Figure 1.

The intermediate tank solution according to the invention can be applied in all arm alternatives.

The invention makes it possible to use a sinusoidal device which is movable relative to the main tank, which is technically and economically advantageous compared to the use of a fixed quadricycle device.

With the equipment described above, the piece can be completely cleaned during one transfer through the cleaning room. The use of the percussion device and the open nozzle and the choice of cleaning granules depend on the characteristics of the area to be cleaned. Generally, the 30 large flat surfaces are cleaned by a percussion device while the cavities and the so-called the shaded areas of the surfaces can be blown 11 72907 in turn with an open nozzle. Ordinary steel surfaces are cleaned with a percussion wheel device and steel grits, and stainless and acid-resistant surfaces are cleaned with an open nozzle and quartz sand. Waste and debris left on the percussion device can be removed immediately by blowing air alone or both air and sand with an open nozzle. The compressed air supplied to the lower end of the boom 3 for the open nozzle can also easily be led therefrom to the throwing wheel device, where it promotes the transfer of the cleaning granules to the blades of the throwing wheel and thus enhances the operation of the throwing wheel 10. Therefore, the structure of the actual throwing wheel can be made simpler than if compressed air were not used. It goes without saying that as a result of all the advantages mentioned, the cleaning costs of the parts are reduced.

Claims (6)

An apparatus for cleaning the surface of a workpiece (11) by means of cleaning particles, including frame parts (1, 2) and a centrifugal flywheel (8) for ejecting cleaning particles against the surface of the workpiece (11) and a blasting nozzle (6). ) for throwing cleaning particles against the workpiece surface (11) by means of compressed air, a movable boom (3) supported by the frame (1, 2), means (9) for attaching the centrifugal flywheel (8) to the boom (3) remote control means for moving the centrifugal flywheel in different directions, means 10 (10) for transporting cleaning particles to the centrifugal flywheel (8), means (4, 5) for attaching the blasting nozzle (6) to the boom (3), remote control means for moving pipes the blasting nozzle in different directions and means (7) for supplying cleaning particles to the blasting nozzle (6) by compressed air, the centrifugal flywheel (8) mounted on the boom (3) with one or more arm parts (4, 5) inside. gripping arm, with which also the blasting nozzle (6) is mounted on the boom or centrifugal flywheel (8) and the blasting nozzle (6) is mounted on the boom (3) with each other separated arms (9); 4, 5), characterized in that an intermediate container is arranged in connection with the arm movable together with the arm (5, 9, 22, 25, 28, 34) for transporting cleaning particles to the centrifugal flywheel (8). Device according to claim 1, characterized in that the arm or arm part (5, 9, 22, 25, 28, 34) simultaneously serves as an intermediate container. Device according to claim 1, characterized in that said intermediate container is mounted on the inside of an arm or arm part. . 30 Device according to claim 1, characterized in that the intermediate container (38, 39) is mounted on the outside of the arm or its part (5, 9, 35).