Steel drum modification
Shanghai Xugong Coating Technology Co., Ltd. Xu Guoxing [translation]
The present invention relates to steel drums and, more particularly, to conversion from open steel drums to closed steel drums, particularly 45 gallon or 210 liter steel drums.
Regardless of whether the old steel drum is opened or closed, when it is necessary to renovate, there is a requirement to fully clean the inside of the steel drum. Thus, sometimes it is necessary to remove one end of the steel drum. The steel drum can then be retrofitted, either as an open steel drum (a steel drum with a removable cover) or by rewinding or welding the end of the steel drum.
There is often a lack of a way to become a closed steel drum by renovating it. However, it is an object of the present invention to provide a method of retrofitting an open steel drum into a closed steel drum.
The present invention provides a method of forming a closed steel drum by crimping the open end of an open steel drum. It is to rotate the open steel drum while inserting a plow-type unwinder at the open end of its bead. The plow-type unwinder unwinds and unfolds the open end of the steel drum based on the axis of the steel drum, and then puts a lid thereon, and then winds the edges together to form a closed steel drum.
The angle between the cuff portion formed by the bead of the steel drum being unfolded by the plow-shaped unwinder and the wall of the steel drum is at least 90°.
Following the unwinding direction of the plow-shaped unwinder, there are two upper and lower rollers, and the flange formed by the open end of the steel drum which is gradually unfolded by the plow-shaped unwinder is formed under the rolling of the upper and lower rollers. The barrel wall has a complex '30. Flanged flanges with angles. At the same time, the cylindrical body of the steel drum is also higher than the original. The flanged flanges are better stretched during continuous rolling. However, there is a point to note here, that is, don't forget to keep the corrugations at the ends of the steel drum.
Thereafter, the barrel of the open steel drum has a circular port that can be made into a closed steel drum by crimping, welding or other better method.
By inserting a plow-shaped unwinder at the bead of the open end of the steel drum, the edge of the winding is opened with a small opening, and the roller cuts into the opening along the direction of the plow unwinding, with the open end of the steel drum The sides are constantly being unfolded, with a space that fully accommodates the plow-shaped uncoiler and the roller. Thus, under the crushing of a roller set consisting of two rollers with at least one drive roller, an unfolded or open barrel flap is formed.
A guide roller is used to support the inner wall of the steel drum adjacent to the plow-type unwinder, the guide roller having a flange extending beyond the edge surface thereof.
The plow-type unwinder has a long beveled nose, and the contact portion of the plow-shaped unwinder with the steel drum is curved in shape with the steel drum. For a 210 liter steel drum, the radius of curvature of this arc is 28.6 cm.
The nose portion of the plow-type unwinder has an outer corner of the lower end which is rounded, and the rounded corner is tapered rearward, and the front end thereof is slightly upward and tapered.
The lower roller in the roller set supports the unrolled roll cuff under the steel barrel mouth, and the upper roll corresponds to the lower roll, and the unrolled roll cuff clamps the upper and lower rolls. between. The flange protruding from the upper roller is rolled along the inner surface of the edge portion of the steel barrel port, and drives the steel drum to rotate in reverse synchronization with the roller.
During the continuous rotation of the drum, the barrel has a fulcrum which consists of two extended rollers. The lower part of the barrel rests on the two rollers, and the entire fulcrum makes the barrel at an angle to the vertical line. This device, called the guide arm, plays a role in positioning the steel drum.
The present invention provides the apparatus and plow-type uncoiler and a pair of upper and lower rolls as described above for carrying out the invention.
Other features of the present invention can be expressed by the following examples and illustrations.
Figure 1 Converting the open barrel into a closed barrel barrel
1 is a longitudinal cross-sectional view of a barrel of an open steel drum and a portion of the barrel lid in the vicinity thereof. In the figure: 1 is the barrel; 2a is the curling; the barrel flange portion 3 and the bead 2a are filled with rubber or synthetic filler 4 to form a sealing layer. Here, the closure (barrel hoop) in which the lid flange 3 and the bead 2a are fastened together is not shown. It can be seen from the figure that the barrel bead 2a and the body of the barrel form a hollow flange.
According to the method of the present invention, the plow-type unwinder is inserted into the center 5 of the bead of the steel tub, so that the bead forms an outward flange 2b, forming an angle of more than 90° with the wall of the steel drum. .
The barrel mouth curling is unfolded by the plow-shaped unwinder, and the roller or the roller set is rolled out. The curled edge that has been plowed is further flattened. Or flatten the crimped portion of the steel barrel mouth by metal spinning. If this action continues. Then, the flange which has been rolled up by the barrel mouth is finally formed into the same as the 2c of the steel barrel in the same manner as 2c in Fig. 1 .
After the steel barrel mouth is rolled up by the above method, the round cover can be installed on the barrel mouth by a method known to us. Fig. 1d is a typical example in which the barrel 1 and the lid 6 are wound together.
In fact, the barrels of the open and closed barrels are made of steel sheets of the same specification. Therefore, the modified steel drum has the same standard size. However, before assembling the lid, remove the burrs on the edge of the barrel if necessary.
Figure 2 Schematic diagram of steel barrel crimping equipment
2 is a steel barrel mouth curling and unwinding device of the present invention. The opening of the mouth of an open bucket 8 is being unwound in the drawing. At this time, the cover 3 and the filler 4 are absent. The steel barrel mouth curl 2a faces up. The plow ejector 9 shown in Fig. 2 has a nose 10 (see Fig. 3). Its protruding height does not exceed the barrel edge 2a of the steel barrel. The guide roller 11 and the plow-type unwinder 9 are opposed to each other to press the inner wall of the steel drum mouth. The peripheral flange 31 of the guide roller exceeds the upper surface of the bead 2a of the steel tub.
Figure 3 Figure 2A-A view
As shown in Fig. 3, the steel drum is rotated counterclockwise, and the plow-type unwinder 9 is unwound along the barrel edge 2a, so that the curl is turned up and unfolded into a flange state (see Figs. 1a and 1b). The rotation of the steel drum is driven by the upper and lower rollers 12 and 13. The upper roller 12 is movable relative to the lower roller 13 so that the steel drum opening flange can be inserted therein. Under the rolling of the upper and lower rollers, the flange formed by the unfolding of the barrel opening forms a flange at a certain angle with the barrel. Here, both rollers are preferably driven rollers.
The lower end of the steel drum is supported on a small angle wheel 14 (consisting of two rollers) as shown in Fig. 2. Thus, the steel drum 8 is lifted at an angle to the vertical direction, and the self-weight of the steel cylinder causes the steel drum to abut against the small angle wheel to avoid displacement of the steel drum. In Fig. 3, the side arms 15 and 16 extend on the upper two sides of the steel drum, and the steel drum is stabilized.
Figure 4 Schematic diagram of the lower roller
Figure 4 illustrates that the lower roller 13 is fixed to the drive shaft by a keyway. The outer surface 20 of the roller has an angle of 15 with the perpendicular to its front end face 18. The front end face 18 of the roller is rounded at the corner of the outer edge.
Figure 5 Schematic diagram of the upper roller
Shown in Figure 5 is a view of the upper roller 12. It has an outer surface 20 which is tapered to the rear end face 21 and which is also fixed to the drive shaft by means of a keyway 22. The drive shafts of the rollers 12 and 13 are parallel. Since the outer edges of the two wheels are uniform, their outer surfaces are intermeshing. The front end outer edge of the upper roller 12 has a flange 23, and the joint portion of the flange and the rear surface 20 has an arc shape. This arc is complementary to the surface of the rounded corner 19 (see Fig. 4) of the lower roller 13. Thus, the flange 24 of the barrel opening in Fig. 1 does not form a chamfer. Its radius of curvature is preferably 8.75 mm.
In Fig. 2, the drive shafts of the upper and lower rollers are horizontal. Then the front surface of the roller is vertical, and the barrel has an angle of 25° with the vertical direction on the device. As previously stated, the outer circumferential surfaces of the two rollers have an angle of 15° with their perpendicular to the end faces. Therefore, the outer surface of the roller has an angle of 130° with the barrel of the steel drum (90°+15°+25°).
The rotation of the steel drum can also be carried out by other means. For example, the side walls of the steel drum are driven by rollers. However, it is preferable to use the friction of the upper and lower rollers 12 and 13 in the figure to drive the flange of the steel drum to be unfolded.
Figure 6 Schematic diagram of the plow unwinder
As shown in Fig. 6, the plow-type unwinder 9 is fixed to the flat plate 25 (see Fig. 1). The plate is bolted to the frame of the device shown in Figure 2. The shape of the plow-type unwinder 9 is roughly 2 and 6d. It has an arcuate inner surface that matches the outer surface of the steel drum body and has a radius of curvature of 28.6 cm. It can also be seen from Figure 6a that the body is beveled and the bevel of the nose 10 begins at the plate 25. In fact, in a particular device, its upper surface 28 is at an angle of 4 to the plate 25. The lower outer surface 29 of the nose 10 is rounded and brought into contact with the end 30 of the bead 2a as it unwinds the bead of the steel tub.
When the equipment is started, the steel barrel mouth curling begins to be initially deployed. Of course, this can also be done by using an iron crowbar or other means. After initial deployment, the nose 10 of the plow-type unwinder begins to be inserted into the center 5 of the mouth of the barrel, at which point the guide roller 11 abuts against the inner surface of the edge of the barrel, while the upper and lower rollers 12 and 13 follow The plow-type unwinder 9 together clamps the portion of the bead that is gradually unfolded.
Then, the rollers 12 and 13 are simultaneously driven, and the steel drum mouth curl 2a is pulled against the nose 10 of the plow-type unwinder to deploy it. The guide roller 1 also cooperates with the roller 12. The roller 12 can be pneumatically or hydraulically driven.
The plow-type unwinder is made of steel. The length and slope should be compatible with the type of steel barrel mouth curling. However, its total height P is calculated from the flat plate 25, preferably 2.23 cm. The specific dimensions of the nose are as follows:
R = 6.35mm; S = 1.9cm; height is 8.3mm, width is 3.8cm
Incidentally, the bead 2a of the steel barrel mouth does not need to be completely straightened as shown in Fig. 1c at the time of unwinding, and the flange formed by the bead has a larger than 90 with the steel body. The angle is enough.
Rights request:
1. A method of retrofitting an open barrel having a bead 2a into a closed barrel. It is characterized in that a plow-type unwinder 9 is inserted into the bead 2a, and the tub 1 is rotated relative to the plow-shaped unwinder 9. The bead 2a is unfolded along the axis of the drum to form a laterally extending cuff 2b, and the cuff 2b is used to join the lid to form a closed steel drum with the body 1 (Fig. 1d).
2. According to claim 1, characterized in that the edge portion of the steel drum mouth curled is sandwiched between the pair of rollers 12 and 13. Among them, at least one roller traction bead 2a is fitted with a plow-type unwinder 9.
3. According to claim 2, the roller is formed by crimping the unfolded steel tub mouth to form a flange 2b which is at least 90° from the barrel 1 and the flange 2b can be continuously straightened to become steel. The extension of the barrel body 1 forms an entire cylindrical shape.
4. A device for converting an open steel drum with a crimp into a closed steel drum. The plow-shaped unwinder for opening the bead 2a, and the plow-type opener 9 for pulling the edge 2a of the ladle, and having the rolling action of the rollers 12 and 13.
5. The apparatus according to claim 4 wherein the pair of rollers 12 and 13 are drive means which clamp the edge of the unrolled steel tub along the plow ejector. Among them, at least one of the rollers is a driving wheel.
6. The apparatus according to claim 5 wherein the roller 12 has a side-increased flange 23 which radially supports the steel drum inside the drum mouth.
7. Apparatus according to claim 4, 5 or 6, wherein the guide roller 11 is disposed relative to the plow ejector at a position which bears against the inner wall of the steel drum. It has a laterally projecting flange 31 which projects at least from the upper surface of the barrel mouth 2a.
8. The apparatus according to any one of claims 4 to 7, wherein the bowl 8 is suspended at an angle to the vertical direction, and the lower portion of the barrel is supported by the roller. .
9. A device according to any one of claims 4 to 8, wherein the plow-shaped uncoiler is constituted by a nose which is tapered forward. The lower curved outer surface of the nose is rounded relative to the steel drum.
10. A device according to any one of claims 4 to 9, wherein the surface 27 of the plow-type unwinder 9 has an arc shape adapted to the curved surface of the steel drum wall.
[Original selection from the European Patent Specification Publication No.: 1074723]
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