JP2005335718A - Apparatus for destroying bridge or rat hole of powder and granular material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for destroying bridges or rat holes of powder and granular material for destroying the bridges or the rat holes of the powder and the granule generated in a hopper by an air jetting member fixed/mounted between a flange of a lower part of the hopper and a flange of a powder and granular material transporting pipe connected to the hopper. <P>SOLUTION: The apparatus for destroying the bridges or the rat holes of the powder and the granular material is constituted by providing the air jetting member in which a plurality of air jetting holes are made from an outer peripheral wall face or a wall body of an annular body toward an inner peripheral wall face, a fixing means for fixing/mounting the air jetting member between both flanges, an air pipe connected to an air introducing part of the air jetting holes of the air jetting member, a compressed air intermittently feeding apparatus for jetting intermittently a compressed air into the hopper through the air pipe and the air jetting holes of the air jetting member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a breakage device for a granular bridge or rathole that breaks down a bridge or a rathole that occurs in the vicinity of an outlet of a granular hopper.

Several inventions and devices have been made in the past regarding methods for destroying and preventing bridges and ratholes in the granular material generated near the outlet of the granular hopper.
As a powder particle bridge or rathole breaking device in a hopper according to the present invention, a claw or screw blade for rotating powder particles in a hopper described in JP-A-2002-2873 and JP-A-2000-53188 In order to break the bridge and the like by stirring, a plurality of long break-through members attached to the support frame described in JP-A-6-321291 are inserted into the agglomerated powder by an air cylinder or the like to form the bridge. The one described in Japanese Utility Model Publication No. 7-19193 which breaks the bridge by making the hopper cone part into a cloth and pressing the cloth cone part from the outside, and further the hopper cone-like rigid container The same cone-shaped soft container is provided on the inner side, and compressed fluid is supplied to the airtight gap formed between the rigid container and the soft container. Those such as in JP 2001-39489 JP destroying bridges inflated flexible container inside is observed.
JP 2002-2873 A JP 2000-53188 A JP-A-6-321291 Japanese Utility Model Publication No. 7-19193 JP 2001-39489 A

Any device that breaks the bridge of particles generated in the hopper described in the background art needs to apply some processing to the structure of the hopper itself. It may be forced to suspend operations during the period, and is not immediately useful for resolving the powder bridge or rat hole in the existing hopper.
According to the present invention, a bridge or a rathole generated inside the hopper is formed by mounting the hopper itself between the flange at the lower part of the hopper and the granular material transport pipe connected to the hopper without performing any processing. It is an object of the present invention to provide a breakage device for a bridge or rathole which is simple and economical and can be broken.

The present inventor has solved the above problems by the following means.
(1) A device that is used between a flange at the lower part of a hopper and a flange of a granular material transport pipe connected to the hopper, and breaks down a bridge or a rathole formed by the granular material in the hopper. An air injection member having a plurality of air ejection holes drilled from the outer peripheral wall surface of the annular body or the inner wall surface to the inner peripheral wall surface, and fixing means for fixing and mounting the air injection member between the flanges. An air pipe joined to an air introduction portion of an air ejection hole of the air ejection member, and intermittent compressed air supply for intermittently injecting compressed air into the hopper via the air pipe and the air ejection hole of the air ejection member An apparatus for breaking a granular material bridge or a rat hole in a hopper.

  (2) a plurality of air ejection holes of the air ejection member, wherein the compressed air ejected from the air ejection holes is perforated at an angle that causes a clockwise vortex along the inner peripheral wall surface; There are two types, one formed by an angle that forms a vortex flow, and each of which is alternately arranged, and an air outlet hole in which the output end of the air pipe is a clockwise vortex flow, or a counterclockwise vortex flow The apparatus for destroying a granular particle bridge or rat hole according to the preceding item (1), wherein the device is selectively joined to any one of the air ejection holes.

  (3) A plurality of air pipes held at regular intervals, and an air jet that becomes a clockwise vortex by collectively moving the plurality of air pipes along the outer peripheral wall surface of the air jetting member in the same direction The granule bridge or rat according to the above item (1) or (2), characterized in that it can be joined to either a hole or an air ejection hole that forms a counterclockwise vortex. Hall destruction device.

  (4) The angle at which the plurality of air ejection holes of the air ejection member become the clockwise vortex flow or the counterclockwise vortex flow of the compressed air injected from the air ejection hole along the inner peripheral wall surface, respectively. The breakage device for a granular material bridge or rat hole according to item (1), wherein the device is perforated at any one of the angles.

  (5) The plurality of air ejection holes of the air ejection member are formed so as to be inclined upward so that the compressed air ejected from the air ejection holes can be raised along the inner wall of the hopper. An apparatus for breaking a granular material bridge or rat hole in a hopper according to any one of (1) to (4) above.

  (6) A plurality of air ejection holes of the air ejection member are drilled obliquely downward so that the compressed air ejected from the air ejection holes can be ejected into the granular material transport pipe connected to the hopper. The breakage device for a granular material bridge or rathole in the granular material transport tube according to any one of the preceding items (1) to (4), wherein:

  (7) The air jetting member is formed so that the compressed air injected from the air jetting hole of the air jetting member is raised along the inner wall of the hopper obliquely upward, The above-mentioned item comprising a plurality of air ejection holes drilled downward obliquely so that compressed air ejected from the air ejection holes can be ejected into the granular material transport pipe connected to the hopper ( The breaker of the bridge | bridging of a granular material or a rat hole in the hopper and the granular material transport pipe of any one of 1)-(4).

  (8) An air jet in which an air jetting member having an air jet hole drilled obliquely upward and an air jet hole drilled diagonally downward is drilled diagonally upward In the preceding paragraph (7), compressed air is supplied simultaneously from an intermittent compressed air supply device to an air introduction portion between the hole and an air ejection hole drilled obliquely downward. Breaker of ratchet bridge or rathole in the hopper and the granule transport pipe.

  (9) Air in which the air jetting member provided with the air jet hole drilled obliquely upward and the air jet hole drilled diagonally downward is drilled obliquely upward The compressed air supplied to the air introduction part of the ejection hole is supplied with a delay from the compressed air supplied to the air introduction part of the air ejection hole drilled obliquely downward. The breaker of the bridge or rathole of the granular material in the hopper and the granular material transport pipe according to (7) above.

  (10) The preceding item (1), wherein the fixing means for fixing the air injection member between the flange at the lower part of the hopper and the flange of the granular material transport pipe connected to the hopper is by screwing a bolt and a nut. 1) to the breakage device for a granule bridge or rat hole according to any one of (9).

  (11) The preceding item (1), wherein the fixing means for fixing the air injection member between the flange at the lower part of the hopper and the flange of the granular material transport pipe connected to the hopper is a clamp. The breaker of the bridge | bridging of a granular material of any one of (7), or a rat hole.

  (12) The above-mentioned (1) to (11), wherein the breaker for the granular bridge or rat hole acts to prevent the formation of the granular bridge or the rat hole in the hopper. The breaker of the bridge | bridging of a granular material or the rat hole in the hopper of any one of 2).

The following effects can be expected from the bridge or rathole breaking device of the granular material of the present invention.
(A) According to the invention of claim 1,
The granule bridge or rat hole breaking device of the present invention is used by being fixed and mounted between the flange at the lower part of the hopper and the flange of the particle transport pipe connected to the hopper, An air injection member in which a plurality of air ejection holes are bored from the outer peripheral wall surface or the inner wall surface of the annular body toward the inner peripheral wall surface, and fixing means for fixing and mounting the air injection member between the flanges; An air pipe joined to an air introduction portion of an air ejection hole of the air ejection member, and a compressed air intermittent supply device for intermittently injecting compressed air into the hopper through the air pipe and the air ejection hole of the air ejection member It has a simple configuration, has few consumable parts, is easy to maintain and can be expected to have a long service life.

  (A) In addition to the effect (a), the granular material bridge or rat hole breaking device according to the present invention includes a flange at the lower part of the hopper and a flange of the granular material transport pipe connected to the hopper. Since the air injection member can be fixed and attached by screwing or clamping the bolt and nut between them, the hopper can be attached to the hopper easily and economically without any processing on the hopper body. Or it can have a function of destroying the rat hole.

(C) According to the invention of claim 2 or 4,
Compressed air injected into the hopper from the air injection hole of the air injection member becomes a clockwise or counterclockwise vortex and rises spirally along the inner wall of the hopper, so that the granular material generated in the hopper Bridges or ratholes can be easily destroyed.
(D) According to the invention of claim 3, a plurality of air ejection holes, each of which forms a clockwise or counterclockwise swirl of compressed air injected into the hopper from the air ejection holes of the air ejection member, are alternately disposed. In the air injection member, the air pipe and the air injection hole are switched to one of the air injection hole that is a clockwise vortex flow or the air injection hole that is a counterclockwise vortex flow. The direction of the vortex generated can be easily changed, and the bridge or rat hole of the granular material generated in the hopper can be more effectively destroyed.

(E) According to the invention of claim 5,
Since the air ejection hole of the air ejection member is drilled obliquely upward, the compressed air ejected from the air ejection hole rises along the inner wall of the hopper, so that the particles generated in the hopper The bridge or rat hole can be destroyed more easily and effectively.

(F) According to the invention of claim 6,
Since the air injection hole of the air injection member is drilled obliquely downward, the compressed air injected from the air injection hole is injected into the granular material transport pipe. The bridges or ratholes of the powdered particles can be destroyed more easily and effectively.

(G) According to the inventions of claims 7 to 9,
Simultaneously with the air ejection hole drilled obliquely upward of the air ejection member and the air ejection hole drilled obliquely downward, or earlier than the air ejection hole drilled upward By supplying compressed air to the air ejection holes drilled toward the surface, it is possible to effectively destroy the bridges or ratholes of the granular material generated in the hopper and the granular material transport pipe at the same time.

(H) According to the inventions of claims 10 and 11,
The air injection member can be fixed and attached easily and detachably between the flange of the lower part of the hopper and the flange of the granular material transport pipe connected to the hopper, and the bridge or rathole can be easily attached to the existing hopper. A destructive function can be provided, and inspection and maintenance of the air injection member can be easily performed.

(K) According to the invention of claim 12,
Generation of a bridge or a rathole can be prevented by operating the breaker of the granular bridge or the rathole before the generation of the bridge or the rathole.

Embodiments of the present invention will be described with reference to the drawings of the examples.
FIG. 1 is an explanatory view of mounting a breaker for a bridge of a granular material or a rat hole of the present invention to a hopper, FIG. 2 is a perspective view and a top view of an air jet member of the present invention, and FIG. 3 is an air ejection hole and an air pipe FIG. 4 is a partial cross-sectional view of a member for air injection having an injection port in which an air injection hole is directed obliquely upward, and FIG. 5 is an illustration in which the air injection hole is directed obliquely downward. FIG. 6 is a partial cross-sectional view of an air injection member having an injection port. FIG. 6 is a top view and a cross-section of an air injection member having an injection port with an air injection hole directed obliquely upward and an injection port with an air injection hole directed obliquely downward. FIGS. 7A and 7B are top views of the air injection member having the air ejection holes branched inside the annular member.
In the figure, 1 is an air injection member, 1a is an air ejection hole, 1b is a bolt insertion hole, 2 is an air pipe, 3 is a compressed air intermittent supply device, 4 is an on-off valve, 5 is an air tank, 6 is a hopper, and 6a is a lower part of the hopper A flange, 7 is a granular material transport pipe, 7a is a flange of the granular material transport pipe, 8 is a bolt, and 9 is a nut.

As shown in FIG. 1, the granular material bridge or rat hole breaking device of the present invention is mounted between the lower flange 6 a of the hopper 6 and the flange 7 a of the granular material transport pipe 7 connected to the hopper 6. Fixing means for fixing and mounting the air injection member 1 between the air injection member 1 and the lower flange 6a of the hopper 6 and the flange 7a of the granular material transport pipe 7 (bolts in FIG. 1) And an air pipe 2 joined to an air introduction portion of an air ejection hole of the air injection member 1, and into the hopper 6 via the air pipe 2 and the air ejection hole of the air injection member 1. It is comprised with the compressed air intermittent supply apparatus 3 which injects compressed air intermittently.
The air pipe 2 is preferably multi-branched (two branches in FIG. 1) in the vicinity of the air injection member 1 in order to reduce the number of the air injection member 1 and the intermittent compressed air supply device 3 connected. The air ejection holes formed in the air ejection member 1 are also preferably a multiple of the number of branches.
In addition, an open / close valve 4 is provided for each of the plurality of air pipes 2 connecting the air injection hole 1a of the air injection member 1 and the compressed air intermittent supply device 3, and stored in the air tank 5 of the intermittent compressed air supply device 3 as necessary. It is also preferable that the compressed air be jetted all at once through all the air pipes 2 or be partially jetted through some of the air pipes 2.

  Next, a description will be given of some of the embodiments relating to the air jetting member 1 and the joining of the air jetting member 1 and the air pipe 2 which are the points of the breakage device of the granular material bridge or rat hole of the present invention.

As shown in FIG. 2, the first embodiment of the air injection member 1 is a compression in which a plurality of air injection holes 1a are injected from the outer peripheral wall surface to the inner peripheral wall surface of the annular body. Two types of air, one with an angle that forms a clockwise vortex along the inner peripheral wall surface of the annular body, and the other with an angle that forms a counterclockwise vortex (four in FIG. 2) alternately The front end of the air pipe 2 is selectively joined to either one of the air injection holes 1a that forms a clockwise vortex or a counterclockwise vortex.
A plurality of air injection members 1 are fixedly mounted between the lower flange 6a of the hopper 6 and the flange 7a of the granular material transport pipe 7 at positions not intersecting with the air ejection holes 1a (see FIG. Eight bolt insertion holes 1b are drilled.

  FIG. 3 shows the air pipe 2 in order to selectively join the air pipe 2 to either the air introduction part that becomes a clockwise vortex flow of the air ejection hole 1a or the air introduction part that becomes a counterclockwise vortex flow. As described above, it is preferable that the air jetting member 1 is configured to be movable along the outer peripheral wall surface. In this case, it is desired that the air pipe 2 and the air ejection hole 1a have a structure that does not leak air, and the means or structure for sealing the opening of the air ejection hole 1a to which the air pipe 2 is not joined. It is also preferable that is added.

In the second embodiment of the air jetting member 1, the plurality of air jetting holes 1a of the air jetting member 1 are such that the compressed air jetted from the air jetting holes 1a is swirled clockwise along the inner peripheral wall surface. Or an angle that forms a counterclockwise vortex flow.
In the case where the rotational direction of the vortex generated by the air injection into the hopper only needs to be one of the clockwise direction and the counterclockwise direction, the air pipe 2 can be fixed to the air introduction portion of the air injection hole 1, and the first embodiment Thus, the moving means for the air pipe 2 and the means for preventing air leakage due to movement can be omitted, and the cost can be reduced.
In this case, if the air ejection hole 1a is formed horizontally from the outer peripheral wall surface to the inner peripheral wall surface, the rotational direction of the vortex flows in the hopper 6 with the air jetting member 1 upside down. Since it can be changed if it is mounted, it is not necessary to produce two types of air jetting members 1 of clockwise and counterclockwise.

In the third embodiment of the air jetting member 1, the plurality of air jetting holes 1a of the air jetting member 1 jets compressed air obliquely upward on the inner wall surface of the annular body as shown in FIG. In this way, the jet nozzle is drilled obliquely upward.
As a result, the compressed air injected from the air ejection holes 1a rises along the hopper inner wall, and can more effectively destroy the granular particle bridge or rat hole generated in the hopper.
Note that the air ejection hole 1a in which the ejection port is bored obliquely upward so as to eject the compressed air of Example 3 obliquely upward is applied to the air ejection hole 1a of Example 1 or 2. Is also preferable.

  In the fourth embodiment of the air jetting member 1, the plurality of air jetting holes 1a of the air jetting member 1 jets compressed air obliquely downward on the inner wall surface of the annular body as shown in FIG. In this way, the jet port is formed so as to be inclined obliquely downward, and the compressed air injected from the air ejection hole 1a is injected into the granular material transport tube, and the granular material generated in the granular material transport tube It is effective to destroy the bridge or rat hole.

The fifth embodiment of the air jetting member 1 is a jet nozzle in which the air jetting holes 1a of the air jetting member 1 of the third embodiment jet the compressed air obliquely upward on the inner wall surface of the annular body. And the air outlet hole 1a of the fourth embodiment with the jet port directed diagonally downward so that the compressed air is ejected diagonally downward on the inner wall surface of the annular body. As shown in FIG. 6, a plurality of drilled holes are drilled.
This makes it possible to blow compressed air into the hopper and the granular material transport pipe at the same time or with a time difference, and to destroy the bridge or rat hole of the granular material generated in the hopper and the granular material transport pipe.
In addition, the inside of the annular body as shown in the embodiment 1 or 2 is formed in the air ejection hole 1a in which the ejection port is bored obliquely upward so that the compressed air of the embodiment 5 is ejected obliquely upward. It is also preferable to add either an angle that produces a clockwise vortex along the peripheral wall surface or an angle that produces a counterclockwise vortex.

The air ejection holes 1a shown in Examples 1 to 5 were all drilled from the outer wall surface to the inner wall surface of the annular body. However, as shown in FIG. It may be a branched air ejection hole.
Moreover, in FIGS. 1-6, as a means to fix and mount | wear the air ejection member 1 between the lower flange 6a of the hopper 6 and the flange 7a of the granular material transport pipe 7, it showed on the assumption that the bolt and the nut were screwed together. However, it may be a fixing / mounting means using a clamp.

Compressed air injected into the hopper 6 through the air pipe 2 and the air ejection hole 1a is supplied from the intermittent compressed air supply device 3. The intermittent compressed air supply device 3 includes the air tank 5, and one or a plurality of the compressed air. The on-off valve 4 and the like, and the compressed air accumulated in the air tank 5 are ejected by opening the on-off valve 4 and injected into the hopper 6 and the granular material transport pipe 7.
The on-off valve 4 is provided for each of the plurality of air pipes 2 connected to the air tank 4 as described above, and it is preferable to perform simultaneous injection or partial injection as necessary, with a time difference. It is also preferable to provide means capable of controlling the ejection timing so as to be ejected.
Furthermore, nitrogen gas, argon gas, helium gas, hydrocarbon gas, etc. may be used in addition to air as compressed gas injected into the hopper or the granular material transport pipe from the intermittent compressed air supply device via the air pipe. .

  The granule bridge or rat hole breaking device according to the present invention is not only used to break up the granular bridge or rat hole in the hopper after it is created, When there is a risk of generation, it can be used to prevent the formation of a bridge or rathole of the granular material by injecting compressed air from the air injection member 1 into the hopper 6 in advance.

  It can be used for the purpose of destroying the bridge or rathole of the granular material in the hopper involved in the storage and movement of the granular material and preventing its occurrence.

Configuration diagram of breaker of ratchet bridge or rathole of the present invention The perspective view and top view of the member for air injection of one Example of this invention Diagram showing change in direction of vortex flow caused by switching between air outlet and air pipe Partial cross-sectional view of an air injection member having an injection port with an air injection hole directed obliquely upward Partial sectional view of an air injection member having an injection port in which the air injection hole is directed obliquely downward A top view and a cross-sectional view of an air injection member having an injection port in which the air ejection hole is directed obliquely upward and an injection port in which the air ejection hole is directed obliquely downward Top view of air jetting member having air jet holes branched inside annular member

Explanation of symbols

1: Air injection member 1a: Air injection hole 1b: Bolt insertion hole 2: Air pipe 3: Compressed air intermittent supply device 4: On-off valve 5: Air tank 6: Hopper 6a: Hopper lower flange 7: Granule transport pipe 7a: Flange of granular material transport pipe 8: Bolt 9: Nut

Claims (12)

  A device that is used between a flange at the lower part of a hopper and a flange of a powder transport pipe connected to the hopper, and breaks down a bridge or a rat hole formed by powder particles in the hopper. An air injection member having a plurality of air ejection holes bored from the outer peripheral wall surface or the inner wall surface toward the inner peripheral wall surface, fixing means for fixing and mounting the air injection member between the flanges, and the air injection An air pipe joined to an air introduction part of an air ejection hole of the member for use, and a compressed air intermittent supply device for intermittently injecting compressed air into the hopper through the air pipe and the air ejection hole of the air ejection member An apparatus for breaking a granular material bridge or rat hole in a hopper.   A plurality of air ejection holes of the air ejection member, wherein the compressed air ejected from the air ejection holes is perforated at an angle that forms a clockwise vortex along the inner peripheral wall surface, and a counterclockwise vortex There are two types of air holes that are drilled at an angle, each of which is alternately arranged, and the air pipe has an air outlet hole in which the output end of the air pipe becomes a clockwise vortex, or air that becomes a counterclockwise vortex 2. The powder particle bridge or rat hole breaker according to claim 1, wherein the breaker is selectively joined to one of the ejection holes. 3.   A plurality of air pipes are held at a constant interval, and the plurality of air pipes are collectively moved in the same direction along the outer peripheral wall surface of the air ejection member to form an air ejection hole that becomes a clockwise vortex, or The breaker device for a granular particle bridge or rat hole according to claim 1 or 2, characterized in that it can be joined to any one of air ejection holes that form a counterclockwise vortex.   Either the angle at which the plurality of air ejection holes of the air ejection member become a clockwise vortex or a counterclockwise vortex along the inner peripheral wall surface of the compressed air ejected from the air ejection hole. 2. The apparatus for breaking a granule bridge or a rat hole according to claim 1, wherein the breaker is drilled at one angle.   The plurality of air ejection holes of the air ejection member are formed so as to be inclined upward so that compressed air ejected from the air ejection holes can be raised along the inner wall of the hopper. Item 5. The granule bridge or rat hole breaker according to any one of Items 1 to 4.   A plurality of air ejection holes of the air ejection member are respectively drilled obliquely downward so that the compressed air ejected from the air ejection holes can be ejected into the granular material transport pipe connected to the hopper. The breaker of the bridge | bridging of a granular material or the rat hole in the granular material transport pipe of any one of Claims 1-4 characterized by the above-mentioned.   An air injection hole formed by the air injection member obliquely upward so that the compressed air injected from the air injection hole of the air injection member can be raised along the hopper inner wall; and the air injection hole 5. A plurality of air ejection holes which are drilled obliquely downward so as to be able to be ejected into the granular material transport pipe connected to the hopper. An apparatus for breaking a granule bridge or rathole in the hopper and in the granule transport pipe according to any one of the above.   The air jetting member provided with the air jetting hole drilled obliquely upward and the air jetting hole drilled diagonally downward is inclined with respect to the air jetting hole drilled diagonally upward. 8. The hopper according to claim 7, wherein compressed air is supplied simultaneously from an intermittent compressed air supply device to an air introduction portion with an air ejection hole drilled downward. A device for breaking a granular bridge or rathole in a granular transport tube.   The air jetting member provided with the air jetting hole drilled obliquely upward and the air jetting hole drilled diagonally downward is air in the air jetting hole drilled diagonally upward. The compressed air supplied to the introduction part is supplied with a delay from the compressed air supplied to the air introduction part of the air ejection hole drilled obliquely downward. 8. A breaker for a granular bridge or rathole in the hopper and in the granular transport pipe according to claim 7.   10. A fixing means for fixing the air injection member between a flange at a lower portion of a hopper and a flange of a granular material transport pipe connected to the hopper is formed by screwing a bolt and a nut. The breakage device of the bridge or rathole of the granular material according to any one of the above.   10. The fixing means for fixing the air injection member between a flange at a lower part of the hopper and a flange of a granular material transport pipe connected to the hopper is a clamp. A breaker for a granular bridge or rathole according to claim 1. 12. The device for breaking a granule bridge or rat hole acts to prevent the formation of a powder granule bridge or rat hole in the hopper. The breaker of the bridge | bridging of a granular material in the hopper as described in 1 or a rat hole.

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