FI105396B - Method and arrangement for releasing material with hollow voids - Google Patents

Description

105396

Method and device for removing arched material

The present invention relates to a method and apparatus for dismounting a screw unloader screw disposed on a bottom of a silo, the bearing part of which is disengaged and pivotable about a shaft perpendicularly perpendicular to the bottom of the silo. material through a screw unloader body, and on top of the body, a freely-rotated bearing member 10 relative to the body member, to remove the arched material between the cover member and the silo wall.

BACKGROUND OF THE INVENTION It is known in the art to have screwdrivers with a fixed lid portion in which the lid portion rotates with the screwdriver body, and screw dismounters with a hingedly mounted lid member in which the lid member is rotatably mounted relative to the housing member. With the fixed lid portion, relative movement between the lid portion and the silo material thereon occurs as the screwdriver body rotates, while with the rotatably mounted lid portion, the lid portion remains substantially stationary with respect to the material on top of the lid portion 20. With such screwdrivers • · ·. · /: Occasionally paralysis occurs between the screw extractor cover and the silo wall I I t. When arching occurs, removing it is often laborious and time-consuming.

Screw extractors with a fixed cover section have used various fixed protrusions to prevent strangulation. However, the disadvantage of such a structure, especially in comparison with a solution with a bearing cover part, is that all parts have to be substantially strengthened and there is a great need for power.

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It is an object of the invention to provide a simple, low-energy and fast-acting method and apparatus for removing material initially arched between the cover portion of the screwdriver * · ”and the silo wall.

105396 This object is solved in accordance with the invention and the method according to the invention is characterized by preventing the screw extractor body and the carrier part from rotating by momentarily locking the cover part and the body part.

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In order to remove the arched material, it is usually sufficient that the above steps are applied for a very short period of time, and only until the arching is discharged. The operations can be arranged to take place automatically, whereby the control can take place, for example, according to the degree of loading of the discharge screw.

The features of the device according to the invention are set forth in the characterizing part of claim 2. Preferred further developments of the device are set forth in dependent claims 3-5.

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The invention will now be described in more detail with reference to the accompanying drawing, in which:

Figure 1 shows a schematic sectional view of a silo.

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Fig. 2 is a partial sectional view of a screw extractor provided with a locking member according to an embodiment of the invention.

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Figure 3 is a top view of the screw extractor of Figure 2.

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Fig. 4 is a side elevational view of a screwdriver body.

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Figure 5 is a top view of the upper end of a screwdriver body.

• t · i · * * * • ·. ···. Figure 6 shows the conical cover portion in the view of Figure 4.

«· •« · * «· · • · * I! Figure 1 shows a silo, generally designated 1, on the bottom of which a screw unloader 3 is arranged. The screw unloader 3 has a frame member 5 rotatably mounted with a motor 13 rotatable with respect to the bottom 2 of the silo 1. the unloading screw 6 driven by the motor 14 extends substantially from the section 5 substantially parallel to the bottom 2 of the silo 1.

The unloading screw 6 is arranged to unload the material 7 in the silo 1 via the body 5 of the unloader 3 to the conveyor 15 below.

In the example of Figure 1, the housing member 8 is provided with a freely pivotable bearing member 8. The bearing member 8 enables the screw member 10 to be substantially lighter in dimension and also reduces the power requirement of the motor 13 for rotating the member 5.

However, in some cases, the problem of the bearing cover member 8 as well as the fixed cover member is that the material 7 is arched between the cover member 8 and the wall 9 of the silo 15 1 as shown in Figure 1. To overcome this problem, the device of the invention includes a control member for providing momentary relative motion between the cover portion 8 of the screw member 3 of the body portion 5 and the vaulted material 7 in the silo 1, or for instantaneous enhancement of such relative motion.

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In the embodiment shown in Figs. 1-3, in which the cover part 8 is mounted ··· freely pivotable, the control member 10 is arranged to momentarily lock the screw unloader body 3 and the cover part 8 relative to each other to prevent their mutual rotation. In order to remove the arched material 7, short-term locking is usually sufficient, so that once the arching is released, the locking can be released again.

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In the embodiment shown in Fig. 2, the control member 10 is formed by the axial:. . a pivotally movable bearing pin 11 which locks the cover part 8 and the body part * *. ···. 30 5 between the ball flanges 16 and 17 together. A pin 18 is provided on the pin 11, • t ·. which presses the pin up against the flange 16 until the hole '• m': 19 in the flange 16 is aligned and the pin 11 can reach the hole 19. The lower end of the pin 11 105396 4 below the bottom 2 of the silo 1 has an adjusting screw 20 11 elevation is prevented or alternatively allowed.

Naturally, the movement of the locking pin 11 can be effected, for example, by means of a solenoid 5 and the pin 11 can be arranged to be automatically guided according to the degree of loading of the dismounting screw 6 of the screw extractor 3. The idling of the motor 14 of the unloading screw 6 indicates that arching has occurred in the silo unless the silo as a whole has been emptied.

In the exemplary embodiment shown in Figures 2 and 3, a protruding surface 12 is formed on the outer surface of the cover portion 8, which further enhances the removal of the arched material 7 when the body portion 5 and cover portion 8 are locked together when the body portion 5 is rotated.

In the solutions shown in Figs. 4-6, the screw extractor 3 is provided with a fixed lid part 8. Here, the fixed lid part 8 means that the lid part 8 is rotated with the body part 5 of the screw extractor 3. However, the cover portion 8 may have vertical movement.

. ·. Figures 4 and 5 schematically show the upper part of the body 5 of the screw extractor 3

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. ·. : a portion in which a lifting bar 22 provided with means known per se (not shown) is provided through a hole provided in the lid portion 8 to allow the upper end of the lifting bar 22 to be raised above the upper surface of the lid portion 8; to unlock the vault. Instead of just the end 25 of the lifting rod 22, the lifting rod 22 may be used, if necessary, to lift above the cover part 8 any suitable shape (e.g. projection 12 in Fig. 3) that breaks the vault when the body 5 of the screwdriver 3 is rotated.

Fig. 6 shows yet another example with a screwdriver 3 body part. * · ·. 30 A conical, vertically movably supported lid «« ·. * Is provided at the top. Part 8. To temporarily raise or vibrate the cover part 8 = · ·! Below the J is provided a vibrating member 23 known per se, whereby due to the conical nature of the lid * * · 7 · 5 105396, the cavernous material 7 is subjected to lateral forces which break the cavity.

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Claims (5)

Method for loosening between a screw dispenser (3) arranged on the bottom (2) of a silo (1), the screw dispenser having a relative vertical axis (4) rotatably mounted and rotatable body part (5) with respect to the bottom of the silo. and a dispensing screw (6) projecting substantially from the body part substantially in the direction of the bottom of the silo, which dispensing screw is arranged to dispense material (7) in Siion via the body part of the screw dispenser, and on the body part (5), a lid which is freely rotatably mounted to the body part 10 (8), and the walled material (7) of the body (8) and the wall (9) of the silo (1), characterized in that mutual rotation of the body part (5) of the screw feeder (3) and the lid part (8) is prevented by instantaneous reading. of the cover portion (8) and the body portion (5) together. 2. A device for loosening between a screw dispenser (3) arranged on the bottom (2) of a silo (1), the screw dispenser having relative to the bottom of the silo relative to a substantially vertical shaft (4) rotatably mounted and rotatable body part (5) and a dispensing screw (6) projecting substantially from the body part substantially in the direction of the bottom of the silo, which dispensing screw is arranged to dispense material (7) into the silo via the body part of the screw dispenser, and on the body part (5), a bearing portion (freely pivotally stored) relative to the body part (5). 8), and the body part (8) and the wall (9) of the silo (1): -. woven material (7), characterized in that the device comprises a guide means (10) arranged to momentarily read the body portion of the screw feeder (3) and the cover part (8) together for to prevent their mutual twisting. · 2 ”· 25 Device according to claim 2, characterized in that the control means comprises: 3: of a reading part (10) comprising an axially movable pin (11). • · * «•» ··· t: V. 4. Device according to claim 2, characterized in that the control means (10) is arranged to be automatically controlled according to the load rate of the screw dispenser. : (3) discharge screw (6). m 1 1 • I · 2 «· · t M 3 ψ · 9 105396 5. Apparatus according to claim 2, characterized in that one or more projecting projections (12) are provided arranged on the surface of the lid part (8) against the material (7) in the silo (1). • a «a · * I • · • * II 4« • a 114 a • 4 4 4 • · aa · • M • aaa • aa · · aaaa »aaaaaa • aa • aaa 444 aaaaa • a aa aa« 4 « 14 4% 9 4 4 4 4V a · • · «· 4 a« a 4 * 4 • · · aaa · ♦ * · a · aa ·