• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:NL2006635A
    申请号:NL2006635
    申请日:2011-04-20
    公开日:2011-10-25
    发明作者:Bruno Zinser；Hermann Renn；Siegbert Kohler
    申请人:Coperion Gmbh；
    IPC主号:
    专利说明:

    Title: Transport pipe change
    The invention relates to a transport pipe change according to the preamble of claim 1.
    Such a transport tube change is known from DE 38 17 349 A1. Further transport tube changes are known from DE 11 55 057 A and DE 42 14 761 C1. DE 38 16 231 A1 discloses a pipe branch with a change-over valve and actuator.
    It is an object of the invention to further develop a transfer tube change of the type mentioned in the preamble such that, for example, in the event of a failure of the seal at the cylinder, gas from the swivel drive inside the housing of the transfer tube change and into the particularly in the transport connection.
    This object is achieved according to the invention by a conveyor tube change with the features mentioned in claim 1.
    According to the invention, any gas flowing out from the cylinder in the direction of the housing is led away in a certain manner into the environment of the transport pipe change via the at least one dropout opening. The housing seal according to the invention, together with the at least one failure opening, guarantees that, for example, in the event of a failure of the cylinder seal, gas flowing out of the cylinder cannot penetrate the interior of the housing of the transfer tube change. The housing seal seals the piston rod against the housing in a certain manner, so that not only can no gas penetrate into the interior of the housing from the cylinder, but that also an undesirable penetration of other gaseous, liquid or solid components into the interior of the housing of the transport pipe change is prevented. Conversely, neither product nor gas from the interior of the switch directly reaches the cylinder seal. The design of the transport pipe change can be such that damage to the housing seal due to the product escaping at the outlets is immediately recognized.
    A scraper according to claim 2 guarantees that deposits depositing on the piston rod, for example product deposits, do not have a negative effect on the function of the housing seal.
    A sealing cassette according to claim 3 makes a simple change of the housing seal possible. The housing seal can be accommodated in the sealing cassette together with the scraper, if applicable.
    An embodiment of the sealing cassette according to claim 4 that can be disassembled in the direction of the cylinder facilitates dismantling of components of the pivoting drive for maintenance, adjustment or repair purposes. The exchange of the housing seal and possibly of the scraper is also facilitated in such an embodiment.
    A clamped embodiment of the sealing cassette according to claim 5 allows a simple attachment of the sealing cassette.
    Passage openings according to claim 6 prevent the sealing cassette from undesirably obstructing a fluid communication between the cylinder and the at least one failure opening.
    When a sealing cassette is used to house the housing seal, the drop-out space in the area of the sealing cassette can extend radially. This increases the positioning tolerance when installing the sealing cassette and moreover increases the degrees of freedom when shaping the sealing cassette.
    A plurality of dropouts according to claim 7 further increases the safety of the transfer tube change. In particular, this makes it possible to distribute the dropout openings independently of the respective installation orientation of the transport pipe change, one of which always extends downwardly from the dropout space, so that solid or liquid components are discharged into the surroundings of the housing through this dropout hole could be.
    A device for the drop-out openings according to claim 8 can be realized with a small manufacturing effort.
    At least one closing element according to claim 9 guarantees that only the at least one of the plurality of drop-out openings is free, the free opening of which is also desired when the transport pipe change is operating. The penetration of liquid or solid substances into the outflow space through undesirably open outflow openings can then be prevented. A closing element can be arranged exactly such that several dropouts can close at the same time. The at least one closing element can be a stopper, a 270 ° scale or a rubber band. A 270 ° scale is a scale that is only about 3/4 of a total circumference of a tubular object surrounding the scale.
    Embodiments of the invention are explained in more detail below with reference to the drawing. In the drawing:
    FIG. 1 shows a side view, partly in section and partly internal details, of a transfer tube change with a pneumatic swivel drive for a rotatable plug;
    FIG. 2 enlarges the detail II in FIG. 1, which shows a portion of a piston rod of the swivel drive, wherein it is passed through a dropout space with dropouts and through a housing seal;
    FIG. 3 in one with FIG. 2 shows a further embodiment of a housing seal, which in this embodiment is accommodated in a sealing cassette mounted separately in the housing;
    FIG. 4 shows a part of a side view of the transfer tube change in the part of the swivel drive with a diagrammatically shown 270 ° scale, which is arranged over a part of a housing stump surrounding the piston rod, for closing off three of the total of four dropouts;
    FIG. 5 is a section along the line V-V in FIG. 4;
    FIG. 6 in one with FIG. 3 shows a further embodiment of a housing seal accommodated in a sealing cassette; and
    FIG. 7 is a section along the line VII-VII in FIG. 6.
    A transport pipe change 1 has an entrance 2 and two exits 3, 4. A first, linear transport path extends between the entrance 2 and the exit 3 for the product to be transported, for example for bulk goods. Between the entrance 2 and the exit 4 a further conveying path is bent over an angle of 35 °.
    The transport tube change 1 has a rotatable plug 5, which can be rotated by means of a pivoting drive 6, as will be described in more detail below. In a first turning position, which is shown in FIG. 1, the rotary plug 5 releases a first transport connection 7 between the input 2 and the output 3. In a further rotation position, not shown in the drawing, the rotatable plug 5 releases a further transport connection 8 between the input 2 and the further output 4. In the first pivot position according to FIG. 1, the transport connection 8 between the input 2 and the further output 4 is closed by the rotatable tap plug 5. In the further rotational position, not shown, the transport connection 7 between the input 2 and the output 3 is closed off by the rotatable plug 5.
    Between the turning position according to FIG. 1 and the further rotational position, the rotatable plug 5 is displaced by 35 ° by a rotational displacement, this rotational displacement in FIG. 1 in the clockwise direction.
    The pivot drive 6 has an arrangement shown in FIG. 1 shows a double-sided drive cylinder 9 with a pneumatically driven piston 10, shown in FIG. 1, because it is not visible per se, is indicated in dotted lines. A piston rod 11 is connected push and tensile to the piston 10. The piston rod 11 engages with its end remote from the cylinder 9 via a double hinge 12 on the rotatable plug 5. A connecting hinge pin 13 is located at a distance from an axis of rotation 14 of the rotatable plug 5. The connecting hinge pin 13 can be used with a quick opening device , for example with a bolt clamped by springs. A simple dismantling of the pivoting drive 6 of the rotatable plug 5 is hereby possible.
    In the first, in FIG. 1, the rotary position of the rotatable plug 5 has the piston rod 11 slid out of the cylinder 9. In the second pivotal position, in which the transport connection 8 is released, the piston rod 11 is slid into the cylinder 9 a piece.
    In the area where the piston rod 11 extends, a housing 15 of the transport tube change 1 is partially cut through and, in the area of the portion of the piston rod 11 facing the hinge 12, is broken open, so that the total piston rod 11 from the cylinder 9 until the hinge 12 can be seen. In reality, the piston rod 11 extends completely inside the housing 15. Between the cylinder 9 and the housing part that surrounds the rotatable plug 5, the housing 15 comprises a housing stub 16 which surrounds the piston rod 11. The cylinder 9 is mounted on the housing stub 16 via a flange 17, which is only schematically indicated in the drawing.
    The piston rod 11 is inserted between the cylinder 9 and the hinge 12 through a housing opening 18 of the housing stub 16. In the area of the housing opening 18, the piston rod 11 is sealed against the housing 15 by means of a housing seal 9, which surrounds the jacket wall of the piston rod 11 over the entire circumference. The housing seal 19 closes off an internal space of the transport pipe change with respect to the environment. A transport pressure present inside the transport pipe change 1, in particular in the transport connections 7 and 8, cannot escape to the outside on the basis of the housing seal 19. The housing seal 19 guarantees to the outside in the event of a failure of a seal of a pressurized working space 20 in the cylinder 9 that the excess pressure in the working space 20 cannot escape into the interior of the housing 15.
    Between the cylinder 9 and the housing seal 19, a plurality of drop-out openings 21a-21d are arranged in the embodiment shown in the drawing. In FIG. 1, the lower failure opening 21a and the upper failure opening 21c are visible.
    FIG. 5 shows all four dropouts 21a-21d. These are starting at the lower failure opening 21a in FIG. 5 are numbered in the clockwise direction around the piston rod 11 shown in section. The dropout openings 21a-21d extend in different directions from the dropout space 21 and are arranged uniformly distributed over the circumference of the piston rod 11.
    Via the dropout openings 21a-21d, the device according to FIG. 1 shows a failure space 22 formed between the cylinder 9 and the housing seal 19 in connection with the environment of the housing 15. Depending on the design of the transport pipe change 1, at least one of such failure openings is for establishing a connection between the failure space 22 and the surroundings of the housing 15.
    If, under the pressure of a cylinder seal, the pressurized gas flows from the cylinder 9 from the working space 20 into the drop-out space 22, this gas can leave the drop-out space 22 via the at least one drop-out opening 21a-21d to the environment around the housing 15. Conversely, in the event of failure of the housing seal 19, outflow product or gas from the interior of the transport pipe change 1 does not damage the cylinder seal, but escapes through the at least one failure opening 21a-21d.
    FIG. 2 shows a portion of the piston rod 11 in the area of the failure space 22 and the housing seal 19.
    The housing seal 19 is arranged in the housing 15 between the failure space 22 and a collection space 23 arranged towards the interior of the housing.
    A scraper ring 24 is arranged between the housing seal 19 and the collecting space 23 near the housing seal 19 in the housing opening 18. The scraper ring 24 is fixedly mounted in the housing 15. Scraper lips 25 of the scraper ring 24 are close to the jacket wall of the piston rod 11. If, for example, product from the transport connections 7, 8 coming onto the jacket wall of the piston rod 11 enters the area between the hinge 12 and the housing opening 18, then when the piston rod 11 is retracted into the cylinder 9, this product becomes damaged by the scraper ring 24 scraped from the piston rod 11 and moved to the collecting space 23, where the product can be removed from the transport pipe change during the next maintenance or cleaning.
    FIG. 3 shows in a manner shown in FIG. 2 shows a further variant of a housing seal 26 and of the scraper ring 24. Parts corresponding to parts which in the foregoing refer to FIG. 1 have already been explained, bear the same reference numerals and are not discussed in detail here again.
    In the embodiment according to FIG. 3, the housing seal 26, which furthermore corresponds to the housing seal 19, is provided with an annular wedge recess 27. The latter is arranged in a circumferentially directed lateral face of the housing seal 26, which faces the scraper ring 24. The wedge recess 27 in the housing seal 26 causes a pressure of the housing seal 26 on the piston rod 11 at a transport overpressure in the interior of the transport pipe change 1.
    In the embodiment according to FIG. 3, the housing seal 26 is not located directly next to the scraper ring 24, but is in an axial distance between these two parts. This axial spatial separation of the housing seal 26 from the scraper ring 24 leads to a simplification of the assembly.
    The housing seal 26 and the scraper ring 24 are in the embodiment according to FIG. 3 is accommodated in a sealing cassette 28 mounted separately in the housing 15. An outer casing wall of the sealing cassette 28 is sealed via an O-ring seal 29 against an inner wall of the housing opening 18. The sealing cassette 28 is slid into the housing 15 from the cylinder 9 in the housing 18 up to a circumferential collar 30 serving as a stop. The sealing cassette 28 is designed to be removable from the housing 15 in the direction of the cylinder 9. To this end, the sealing cassette 28 can be pulled out of the housing opening 18 in the direction of the cylinder 9.
    FIG. 4 and 5 show a closing element 31 for closing a total of three of the four dropouts 21a-21d, namely for closing the dropouts 21b -21d. The closing element 31 can be used in all described embodiments of housing the housing seal. The closing element 31 is designed as a 270 ° scale which encloses a casing wall of the housing stub 16 sealingly over a range of 270 ° from its circumference. Depending on how the closing element 31 is arranged on the circumference, it can thus seal off three selected ones of the total of four dropouts 21a-21d, the fourth of the dropouts 21a-21d remaining free. Depending on the installation orientation of the transport pipe change, it is guaranteed that the bottom of the drop-out openings 21a-21d in each orientation remains free, so that in particular liquid or solid media, for example lubricants, condensed water, or wear particles, from the drop-out space. 22 can fall out through this free lower failure opening (see the failure opening 21a in the installation orientation shown in the drawing).
    Moreover, undesired liquid or solid components are prevented from penetrating into the dropout space 22 through the shut-off openings 21a-21d under the influence of gravity.
    Instead of a 270 ° scale as a closing element 31, a plug or a rubber band can be used to seal the drop openings 21a-21d to be closed.
    With reference to FIG. 6 and 7, a further variant of a sealing cassette 32 is described below, which instead of the sealing cassette 28 according to FIG. 3 can be applied. Parts corresponding to parts described in the foregoing with reference to Figs. 1-5 and in particular with reference to Figs. 3 have already been explained, have the same reference numerals and are not discussed in detail again.
    The sealing cassette 32 is extended via a sleeve-like extension 33 to the cylinder 9. In the case of FIG. 6, the sealing cassette 32 is clamped against the housing 15 of the conveyor tube 1 via the circumferential collar 30 and with a sleeve-like extension piece 33 against a connecting flange 34 of the cylinder 9. The sleeve-shaped extension 33 has passage openings 36, in particular in a portion which is located next to a radially inwardly extending circumferential collar 35 of the sealing cassette 32. In total, the sleeve-shaped extension 33 has four passage openings 36, which are each arranged in the circumferential position of the four drop-out openings 21a-21d. Each of one of the drop-out openings 21a-21d is therefore opposite one of the passage openings 36. As a result, an inner space 38, which is bounded radially inwardly by the piston rod 11 and radially outwardly by the sleeve-shaped extension 33, is connected to the sealing cassette 32 portion of the drop-out space 22 radially on the outside, for example, in the area of a seal of the piston rod 11 in the event of a failure of the seal from the cylinder 9, gas can then pass through the inner space 38, the passage openings 36, the drop-out space 22 and the at least one dropout opening 21a-21d are discharged to the outside.
    At the level of the sealing cassette 32, the drop-out space 22 has a radial widening 37 which, also with an axial positioning tolerance of the sealing cassette 32 or with sealing cassettes 32 of different axial dimensions, has a sufficiently wide fluid connection between an in the region of the cylinder connection flange 34 guarantees a cylinder leakage failure and failure openings 21a-21d. Alternatively or additionally, the sleeve-shaped extension 33 may comprise a radially rearwardly offset portion in its outer casing wall, which portion is, for example, designed in the form of a wide groove. Such a design allows at least a portion of the failure space 22 to be determined. The advantages of such a radially backward offset portion correspond to those explained in connection with the radial widening 37.
    权利要求:
    Claims (9)
    [1]
    Conveyor tube change (1) with an input (2) and at least two outputs (3, 4), with a rotatable plug (5), which can be moved between different rotational positions by means of a pivot drive (6), the rotatable plug (5) in a first rotational position a first transport connection (7) between the input (2) and a first (3) of the outputs and in at least one further rotational position a further transport connection (8) between the input (2) and a further (4) releasing from the exits, the pivotal drive (6) comprising a cylinder (9) with a pneumatically driven piston (10) and a piston rod (11) connected thereto, which piston rod (11) via a hinge (12) engages the pivotable plug (5) at a distance from a pivot axis (14), characterized in that the piston rod (11) between the cylinder (9) and the hinge (12) is sealed via a housing seal (19); 26) is passed through a housing opening (18) of a housing (15) of the transfer tube change (1), wherein at least a dropout opening (21a-21d) between the cylinder (9) and the housing seal (19; 26), wherein a failure space (22) formed between the cylinder (9) and the housing seal (19; 26) is connected to the environment of the housing (15) via the at least one failure opening (21a-21d).
    [2]
    A conveyor tube change according to claim 1, characterized in that a scraper (24) fixedly connected to the housing is arranged around the piston rod (11) between the housing seal (19; 26) and the hinge (12).
    [3]
    Conveyor tube change according to claim 1 or 2, characterized in that the housing seal (19; 26) is accommodated in a sealing cassette (38; 32) mounted separately in the housing (15).
    [4]
    Conveyor pipe change according to claim 3, characterized in that the sealing cassette (28; 32) is designed to be removable from the housing (15) towards the cylinder (9).
    [5]
    Conveyor pipe change according to claim 4, characterized in that the sealing cassette (32) is designed to be clamped between the cylinder (9) and the housing (15).
    [6]
    Transfer tube change according to one of claims 3 to 5, characterized in that the sealing cassette (32) in a sleeve-shaped extension (33) has at least one passage opening (36), through which a fluid connection can be established between a space ( 38), which at least partially surrounds the piston rod (11) and the at least one drop-out opening (21a-21d).
    [7]
    A conveyor tube change according to any one of claims 1-6, characterized by a plurality of dropouts (21a-21d) extending from the dropout space (22) in different directions.
    [8]
    A conveyor tube change according to claim 7, characterized by a plurality of drop openings (21a-21d) arranged over the circumference of the piston rod (11).
    [9]
    A conveyor tube change according to any of claims 1-8, characterized by at least one closing element (31) for closing at least one (21 b-21 d) of the dropouts (21a-21d), wherein at least one (21a ) of the dropouts (21a-21d) remains free when the transfer tube change (1) is in use.
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    同族专利:
    公开号 | 公开日
    KR20110118082A|2011-10-28|
    DE102010028119A1|2011-10-27|
    DE102010028119B4|2015-01-29|
    NL2006635C2|2013-02-12|
    CN102234025A|2011-11-09|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3816231A1|1988-05-11|1989-11-23|Sallhofer & Co|Pipe fork having a switch-over flap and an actuating drive|
    DE3817349A1|1988-05-20|1989-11-23|Waeschle Maschf Gmbh|PIPE DIVER FOR PNEUMATIC CONVEYOR OF PUMPING GOODS|
    DE1155057B|1962-05-05|1963-09-26|Franz Jos Waeschle Maschinenfa|Transfer tube for the pneumatic conveyance of dusty or grainy substances|
    DE9104817U1|1991-04-19|1991-08-01|Waeschle Maschinenfabrik Gmbh, 7980 Ravensburg, De|
    DE4214761C1|1992-05-09|1993-10-07|Reimelt Dietrich Kg|Pipe junction with plug turning in cylindrical housing - has forcing mechanism thrusting plug and cover out of housing parallel to pivot axis|
    CN2466110Y|2001-02-07|2001-12-19|方圆集团有限公司|Concrete distributing valve|
    US7182229B2|2004-12-22|2007-02-27|Nordson Corporation|Device for dispensing liquid having an improved seal assembly|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102010028119.0A|DE102010028119B4|2010-04-22|2010-04-22|Conveying pipe switch|
    DE102010028119|2010-04-22|
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