Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
  • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
  • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2

Definitions

• the invention relates to a device for comminuting dry ice granules, comprising a housing with a flow channel for dry ice granules which can be applied to a surface to be cleaned by means of compressed gas and a first comminution element for comminuting the dry ice granules to be dispensed.
• the invention relates to a dry ice dispensing assembly for dispensing a mixture of compressed gas and dry ice granules with such a device.
• a dry ice blasting apparatus for providing a mixture of compressed gas, preferably compressed air, and dry ice.
• the dry ice blasting device can be connected to a compressed gas source.
• the dry ice blasting device comprises a supply of dry ice and a metering device with which the dry ice can be admixed with the compressed gas.
• the dry ice is stored in the form of dry ice granules (so-called "pellets”), which usually has the size of rice grains, and introduced by means of the metering device in the flow path of the compressed gas, so that it mixes with the compressed gas.
• a surface to be cleaned can be subjected to pressurized dry ice granules.
• Contaminants adhering to the surface are formed by the application of Dry ice granules strongly cooled so that they become brittle and detached from the surface.
• the devices mentioned at the beginning for the comminution of dry ice granules are usually offered as accessories to dry ice dispensing arrangements.
• dry ice granules For comminuting dry ice granules, they comprise a flow channel through which the mixture of compressed gas and dry ice granules flows and on which a comminution element is arranged. If the dry ice granules mixed with compressed gas collide with the comminution element, it can break and be crushed as a result. As a result, the comminuted pellets on the output side of the device have a smaller average size than the input side of the device.
• the dry ice granules comminuted in this way are preferably suitable for cleaning sensitive surfaces, fine structures or undercuts.
• the housing comprises a pipe enclosing the flow channel, in which a crushing member is welded in the form of a metal wire. This is manufacturing technically complex, and moreover, the wire is subject to high wear.
• the crushing member is formed as a mesh and inserted into a tube enclosed by the housing. In such devices, there is a risk that the grid mesh is added during operation with dry ice granules, so that the flow channel is blocked.
• Object of the present invention is to provide a device of the type mentioned, with the different degrees of comminution of dry ice granules can be achieved in a simple manner.
• the device has at least one second crushing member which can be arranged in the housing in a position in which in combination with the first crushing element aPolzerkleintationsgrad is achieved, which is greater than that alone with the first crusher achievable Einzelzerklein ceremoniessgrad.
• a "spatial position" of the at least one second comminution element in the housing or a part thereof is relatively "spatial” considered to the first crushing member.
• the at least one second comminution element can assume a position in the housing in which the overall comminution level, ie the degree of comminution of the dry ice granulate after passing through both comminution elements, is greater than the single comminution rate that can be achieved with the first comminution element alone.
• the at least one second crushing member can be removed from the housing. This makes it possible to achieve with the device also achievable alone with the first crushing Einzelzerklein ceremoniessgrad. By means of the device according to the invention is therefore given the opportunity to achieve by selectively using the at least one second crushing member in a technically simple manner, at least two degrees of comminution of dry ice granules.
• the first crushing member can be removed from the housing, so that only the at least one second crushing member can be arranged in the housing.
• the possibility can be given of achieving, by means of the at least one second comminuting member alone, a single degree of comminution which differs from the single comminution degree which can be achieved only with the first comminuting member.
• a total of at least three degrees of comminution of dry ice granules can thus be achieved by optional use of the first comminuting member and / or the at least one second comminuting member.
• the at least one second crushing member can be arranged in the housing in a position in which the total degree of comminution is the same as that achievable with the first comminution element Einzelzerklein ceremoniessgrad.
• the at least one second crushing member may remain in the housing. As a result, for example, the risk can be reduced that the at least one second comminuting member is lost.
• the at least one second comminution element can be arranged in the housing in a plurality of layers, in which the overall comminution rate is greater than the single comminution rate achievable alone with the first comminution element. This facilitates a user's handling of the device.
• the Device can be used in many ways, because by means of the first comminution member and the at least one second comminuting member, a plurality of different total comminution levels of dry ice granules can be achieved.
• the device has at least one second comminuting member which is identical to the first comminuting member. Due to the identical design, the production costs for the Reduce device. If two or more second comminuting members are present, it can be provided, in particular, that all second comminuting members are identical to the first comminuting member.
• the device has at least one second comminuting member, which is designed differently from the first comminuting member.
• the first crushing member and the at least one second crushing member each different Einzelzerklein ceremoniessgrade between which the user can select in addition to the total degree of comminution.
• Such an embodiment therefore has a high versatility. If there are two or more second comminuting members, it can be provided that all second comminuting members are designed differently from the first comminuting member.
• the first and / or the at least one second comminuting member for comminuting dry ice granules comprises a grid section which can be positioned in the flow channel.
• the grid section By means of the grid section, it is possible to reduce the cross section of the flow channel. The guided by compressed gas through the flow channel dry ice granules can impact the grid section, break and thereby crushed.
• the at least one second comminution element can be converted into different positions by rotation of its grating section relative to the grating section of the first comminuting element, in which different total degrees of comminution can be achieved.
• This is it to a structurally simple way to achieve different Baczerklein ceremoniessgrade with the first and the at least one second crushing member.
• the rotation of the grating portion of the at least one second crushing member takes place about an axis of the flow channel.
• the grid portion of the at least one second crushing member is to be rotated about an axis oriented transversely to the axis of the flow channel.
• the rotation can be done, for example, by predeterminable angle, but it can also be provided that the rotation angle is infinitely adjustable.
• the grid section may be independent of the remaining sections of the at least one second reducing member and be rotatable relative thereto.
• the first and / or the at least one second comminution member has an edge portion with which the first and / or the at least one second comminution member can be supported on the housing.
• By supporting on the housing can be ensured that the first and / or the at least one second crushing member is immobile relative to the flow channel.
• the mechanical stability of the device can be improved.
• the edge section of the first and / or of the at least one second comminution element preferably at least partially encloses a grid section of the first and / or at least one second comminution section which can be positioned in the flow channel.
• the first and / or the at least one second crushing member is disc-shaped.
• the disc may, for example, have a grid section that is at least partially enclosed by a rim section.
• the first and the at least one second crushing member when disposed in the housing, are spaced apart along the flow channel.
• the comminution of the dry ice granules can therefore be carried out, for example, in two spaced-apart planes. This reduces the risk that the first and / or the second crushing member is added during operation of the device with dry ice.
• the housing has a receiving body with at least one comminuting member receptacle for the first and / or the at least one second comminuting member.
• the at least one comminution member receiving the first and / or the at least one second crushing member may for example be held immobile.
• the first and / or the at least one second comminuting member in the at least one comminuting member receptacle can be conveyed in various ways. gen is arranged. In particular, in each of the various layers a respective different total degree of comminution can be achieved.
• the first and / or the at least one second comminuting member can be arranged immovably in the at least one comminuting member receptacle relative to the flow channel.
• the at least one comminuting member receptacle has a contact surface for the first and / or the at least one second comminuting member, on which this can be placed and aligned relative to the flow channel. This simplifies a user's handling of the device.
• the alignment thereof is simplified relative to the flow channel. This can ensure that the first and / or the at least one second comminuting member is in the correct position during operation of the device.
• a structurally simple embodiment of the at least one comminuting member receptacle can be achieved in that it is designed as a groove-shaped recess oriented transversely to the flow channel.
• the first and / or the at least one second crushing member which is advantageously disc-shaped, arranged and aligned relative to the flow channel.
• the at least one comminution member receptacle can be formed as a slot-shaped opening oriented transversely to the flow channel.
• the housing has a sleeve which surrounds the receiving body. This makes it possible to give the device a compact design.
• the receiving body can be fixed immovably relative to the flow channel.
• An immovable fixation of the receiving body relative to the flow channel can be achieved, for example, in that the receiving body can be arranged in a form-fitting manner in the sleeve described above.
• the housing has at least one housing cover detachably connectable to the sleeve.
• the sleeve can be closed, so that the receiving body is securely held in the sleeve with the optionally received therein first and / or at least one second crushing member.
• the lid can be detached from the sleeve to remove the receiving body from the sleeve. For a particularly simple handling of the lid with the sleeve can be screwed.
• the invention also relates to a dry ice dispensing arrangement for dispensing a mixture of compressed gas and dry ice granules.
• the object of the present invention is to further develop such a dry ice dispensing arrangement so that dry ice granules with a different degree of comminution can be dispensed therewith in a technically simple manner.
• the dry ice dispensing arrangement comprises at least one device for comminuting dry ice granules, as described above.
• the dry ice dispensing arrangement according to the invention then has the advantages already described in connection with the explanation of the device.
• the dry ice dispensing arrangement can be designed, for example, as a dry ice blasting device or else as a dry ice dispensing device that can be connected to a dry ice blasting device.
• the latter can be configured for example in the form of a blasting gun.
• the device according to the invention for crushing dry ice granules is arranged in or on the dry ice blasting device and / or in or on the dry ice dispensing device.
• the shredding device according to the invention for ease of handling is solvable with theniceisstrahlvor- direction or the dry ice dispenser connectable, for example by screwing.
• Figure 1 a perspective view of an inventive
• Figure 2 is an exploded view of the device of Figure 1;
• Figure 3 is a sectional view taken along the line 3-3 in Figure 1;
• FIGS. 4A, 4B, 4C show exemplary possibilities of combining comminution elements of the device from FIG. 1 according to a first embodiment for achieving different overall comminution levels;
• Figure 4D is a view similar to Figures 4A to 4C with only one
• FIG. 5 shows a view of the device from FIG. 1 in the direction of the FIG
• FIG. 6 shows a receiving body for comminution elements of the device from FIG. 1;
• FIGS. 7A, 7B, 7C show exemplary possibilities of combining comminution elements of the device from FIG. 1 according to a second embodiment for achieving different overall comminution levels;
• FIG. 7D a view similar to FIGS. 7A to 7C with only one
• Figure 8 a schematic view of an inventive
• a preferred embodiment of a device according to the invention for the comminution of dry ice granules which is referred to below as "crusher", occupied by the reference numeral 10.
• the crusher 10 may be part of a dry ice dispensing arrangement according to the invention, as shown in FIG.
• the crusher 10 has a housing 12 with a sleeve 14 and a housing cover 16 which can be detachably connected to the sleeve 14 and which is likewise of sleeve-shaped design.
• the sleeve 14 and the housing cover 16 have a common axis 18 around which they are formed substantially rotationally symmetrical.
• the sleeve 14 has an internal thread, not shown in the drawing, via which it can be screwed, for example, to a dry ice dispenser of a dry ice dispensing arrangement.
• the sleeve 14 At its housing cover 16 facing the second sleeve end 24, the sleeve 14 comprises a not shown in the drawing external thread, which cooperates with a not shown in the drawing internal thread of the housing cover 16 for screwing the sleeve 14 and the housing cover 16.
• the housing cover 16 carries on its side facing away from the sleeve 14 cover end 26 a not shown in the drawing external thread on which, for example, a jet nozzle of a dry ice dispensing assembly can be screwed.
• the housing 12 comprises a sliding over the sleeve 14 outer ring 28, which is made for example of rubber and acts cold-insulating in the operation of the crusher 10.
• a receiving body 30 for crushing members 32, 34, 36 and 38 for comminuting dry ice granules can be arranged inside the sleeve 14.
• the receiving body 30 is formed as a hollow cylinder 40 and aligned in arrangement in the sleeve 14 coaxial with the sleeve 14 and the housing cover 16.
• the receiving body 40 is held immovably in the sleeve 14.
• Its central through bore 42 is aligned with a central through-bore 44 of the housing cover 16 and with a central through-bore 46 of the sleeve 14 to form over the entire length of the housing 12 extending flow channel 48.
• the senende 20 forms an inlet 50 for the flow channel 48
• the lid end 26 forms an outlet 52 for the flow channel 48.
• a mixture of compressed gas and dry ice granules which can be delivered by a dry ice dispensing arrangement, guided and applied to a surface to be cleaned.
• the crusher 10 serves to comminute the dry ice granules in the manner described below.
• the crusher comprises 10 crushers 32, 34, 36, 38 for dry ice granules.
• the comminution member 32 is hereinafter referred to as the first comminution member 32 of the crusher 10, and the comminution members 34, 36 and 38 are referred to below as the second comminution members of the comminutor 10.
• the crushing members 32, 34, 36 and 38 are formed as discs 54, 56, 58 and 60, wherein the disc 58 is identical to the disc 54 and the disc 60 is formed identical to the disc 56.
• the discs 54 and 56 have a different configuration. In the following, only the distinguishing features of the discs 54, 56, 58 and 60 are provided with different reference numerals.
• the disks 54 and 56 comprise grid sections 62 and 64, respectively, with bars 66 and 68, respectively.
• the bars 66 of the pane 54 are offset from the bars 68 of the pane 56.
• the offset is about half the value of the mutual distance of the grid bars 66.
• the grid sections 62 and 64 become each enclosed by an identically formed edge portion 70.
• the grid sections 62 and 64 have in plan view of the discs 54, 56, 58 and 60 a circular contour whose diameter corresponds to the diameter of the through hole 42 and thus of the flow channel 48 in the receiving body 30.
• the discs 54, 56, 58 and 60 When viewed from above, the discs 54, 56, 58 and 60 have the contour of a circle, on the outside of which two circular segments oriented perpendicular to one another have been removed, so that the edge portion 70 has two contact edges 72 and 74 extending at right angles to one another.
• the receiving body 30 For receiving the disks 54, 56, 58 and 60, the receiving body 30 comprises identically designed comminuting member receptacles 76, 78, 80 and 82 (FIG. 2). These each comprise a groove-shaped recess 84, which is aligned perpendicular to the axis of the hollow cylindrical receiving body 30 and thus when it is arranged in the housing 12 perpendicular to the flow channel 48.
• the groove-shaped recesses 84 engage so deeply in the receiving body 30 that they pass through the flow channel 48.
• a rectilinear groove base 86 in each case forms a contact surface 88 for the contact edge 72 or 74 of a disk 54, 56, 58 and 60, respectively.
• the width of the groove-shaped recesses 84 is dimensioned such that the discs 54, 56, 58 and 60 are each play-free between side walls 90 and 92 of a groove-shaped recess 84 can be used.
• the edge portion 70 may be supported on the side walls 90 and 92, so that the discs 54, 56, 58 and 60 aligned with respect to the flow channel 48 can be.
• one of the abutment edges 72 and 74 are applied to the groove bottom 86.
• the diameter of the receiving body 30 corresponds to the diameter of the basic shape of the discs 54, 56, 58 and 60, d. H. disregarding the separated circle segments.
• the first crushing member 32 is disposed in the receiving body 30, for example, in the crushing member receptacle 76.
• the grid portion 62 is positioned in the flow channel 48 and reduces its cross section.
• the reduction of the cross-section of the flow channel 48 can be seen in FIG. 4D, in which the flow channel contour 94 is shown in dashed lines over the contour of the grid section 62.
• Dry ice granules which is guided by means of compressed gas through the flow channel 48, can impact the bars 66 of the grid section 62 and thereby be comminuted.
• the dry ice granules at the outlet 52 of the crusher 10 have an average size smaller than the average size of the dry ice granules at the inlet 50 of the crusher 10.
• the ratio of the average size of dry ice granules at the inlet 50 to the average size at the outlet 52 will be referred to below Comminution degree called. If only one of the comminuting members 32, 34, 36, or 38 is arranged in the receiving body 30, the achievable degree of comminution referred to as Einzelzerklein ceremoniessgrad. By means of the comminuting member 32, therefore, a certain degree of single comminution can be achieved.
• the second comminuting members 34, 36 and 38 are also arranged in the receiving body 30, the discs 54 and 58 being congruent with each other and the discs 56 and 60 being aligned congruent to one another. This corresponds to the combination of the disks 54, 56, 58 and 60 shown in FIG. 4C. Because of the differently configured grid sections 62 and 64, this makes it possible to reduce the cross-section of the flow channel 48 further than is possible with the first comminuting member 32 alone ,
• Dry ice granules guided through the flow channel 48 can now also be comminuted by impact with the bars 68.
• a With such a combination of the crushing members 32, 34, 36 and 38, aPolzerkleintationsgrad achievable, which is higher than the achievable alone with the first crushing member 32 Einzelzerklein ceremoniessgrad.
• the discs 54, 56, 58 and 60 can rest against the groove bottom 86 both with the contact edge 72 and with the contact edge 74, they can be arranged in different ways, ie in different positions, in the comminuting member receptacles 76, 78, 80 and 82 .
• a transfer of one of the comminuting members 32, 34, 36 or 38 from one position to another position is achieved by a rotation of the respective comminution member about the axis 18 or about a perpendicular to the axis 18 and to the groove bottom 18.
• directed axis 96 possible.
• the axle 96 is shown in Figure 2 as passing through the comminution member receiver 76. Since the comminutor holders 76, 78, 80, and 82 are identically formed, they may also be considered to pass through the comminutor holders 78, 80, and 82. The same applies to an axis 136 described below.
• Figure 5 shows a plan view of the crusher 10, in which the reduction of the cross-sectional area of the flow channel 48 according to the combination shown in Figure 4A of the crushing members 32, 34, 36 and 38 can be seen.
• the crusher member receivers 76, 78, 80 and 82 are spaced apart along the flow channel 48, the dry ice granules passed through the flow channel 48 are shredded at different levels. As a result, the risk is reduced that the grid sections 62 and 64 enforce in the operation of the crusher 10 with dry ice granules and thereby restrict its function. Due to the immobility of the crushing members 32, 34, 36 and 38 relative to the flow channel 48, the degree of comminution of dry ice granules during operation of the crusher 10 can be kept constant.
• the shredder 10 may comprise a receiving body 100 shown in FIG. 6, which is configured substantially identical in design to the receiving body 30, for which reason equivalent components as those of the receiving body 30 are provided with the same reference numerals as in FIGS. 2 and 3.
• the receiving body 100 comprises four identically designed comminuting member receptacles 76, 78, 80 and 82, which are each formed as a slot-shaped opening 102 of the receiving body 100.
• the gap-shaped openings 102 are each perpendicular to the through hole 42 and thus aligned in the operation of the crusher 10 perpendicular to the flow channel 48, which they pass through. They each include a bottom wall 104 and a ceiling wall 106 extending parallel thereto, which are connected to one another via side walls 108 and 110.
• comminuting members 112, 114, 116 and 118 shown in FIGS. 7A to 7D can be arranged in a form-fitting manner.
• the comminuting member 112 is hereinafter referred to as the first comminution member, and the comminuting members 114, 116 and 118 are hereinafter referred to as second comminuting members.
• the crushers 112, 114, 116 and 118 are formed as identical disks 120, 122, 124 and 126, respectively.
• Each grid section 128 is bordered by an edge section 130 which, when viewed in a top view of the discs 120, 122, 124, 126, has the shape of a circular ring from which two diametrically opposed circular ring segments have been removed.
• each disc 120, 122, 124 and 126 has two mutually parallel abutment edges 132 and 134.
• the abutment edges 132 and 134 can rest on the bottom wall 104 and on the top wall 106, respectively.
• the edge portion 130 may abut against the side walls 108 and 110, so that overall, as mentioned, the discs 120, 122, 124 and 126 are held in a form-fitting manner in the receiving body 120.
• the operation of the crushing members 112, 114, 116 and 118 corresponds to the operation of the above-described crushing members 32, 34, 36 and 38:
• the first comminuting member 112 is arranged in the receiving body 100, for example in the comminuting member receptacle 76.
• the grating portion 128 is positioned in the flow channel 48, with the bars 129 reducing the cross section of the flow channel 48.
• the reduction of the cross-section of the flow channel 48 can be seen in FIG. 7D, in which the flow channel contour 94 lies over the contour of the grid section 128 is drawn.
• the second reducing elements 114, 116 and 118 are also arranged in the receiving body 100.
• the crushing members 112, 114, 116 and 118 may occupy a plurality of layers in the crusher member receptacles 76, 78, 80 and 82 depending on whether the abutment edges 132 and 134 abut the bottom wall 104 or the top wall 106.
• the crushing members 112, 114, 116 and 118 may be viewed as rotating about the axis 18 about the axis 96, which is presently oriented perpendicular to the bottom wall 104, and about an axis 136 oriented perpendicular to the axes 18 and 96 be transferred to another position (see Figures 2 and 6).
• the grating portion 128 is formed in the receiving body 100 is asymmetrical to the axis 18 in the arrangement of the comminuting members 112, 114, 116 and 118. Therefore, it is possible by means of two crushing members, for example by means of the crushing members 112 and 114, to achieve four total degrees of comminution by their relative arrangement (not shown in the drawing). Of these, three total degrees of comminution are greater than the single degree of reduction achievable with only the first comminution member 112, because the grating portions 128, viewed along the flow channel 48, can assume a crossed position relative to one another.
• the invention also relates to a dry ice dispensing arrangement, of which a preferred embodiment is shown schematically in FIG. 8 and designated by the reference numeral 140.
• the dry ice dispensing arrangement 140 comprises a dry ice blasting device 142, which can be connected via a pressure line 144 to a compressed gas source not shown in the drawing.
• the dry ice blasting machine 142 has a storage container 146 for dry ice granules, which can be mixed by a metering device 148 with the pressure gas guided through the pressure line 144.
• the mixture of pressurized gas and dry ice granules may be supplied to a dry ice dispenser 150 in the form of a blasting gun 152 enclosed by the dry ice dispensing assembly via a supply line 154.
• an actuating lever 156 of the blasting gun 152 By actuating an actuating lever 156 of the blasting gun 152, a surface to be cleaned can be charged with the mixture of dry ice granules and press
• the above-described comminutor 10 is also included in the dry ice dispensing assembly 140 and is detachably connectable to the blasting gun 152 by screwing.
• An outlet 158 of the blasting gun 152 for this purpose comprises an external thread not shown in the drawing, which can cooperate with the already mentioned internal thread on the first sleeve end 20 of the sleeve 14.
• a user can reduce the size of the dry ice granules provided by the dry ice blasting apparatus 142 as described above. Due to the different possibilities of arranging the size reduction elements 32, 34, 36 and 38, 112, 114, 116 and 118 in the receiving bodies 30 and 100, a plurality of total degrees of comminution of dry ice granules can be achieved, so that the dry ice dispensing arrangement 140 can be used in a variety of ways ,

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Crushing And Pulverization Processes (AREA)
• Disintegrating Or Milling (AREA)
• Carbon And Carbon Compounds (AREA)
• Cleaning In General (AREA)

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• 2007
  • 2007-03-19 DE DE102007014284A patent/DE102007014284B4/de active Active
• 2008
  • 2008-03-12 WO PCT/EP2008/001960 patent/WO2008113497A1/de not_active Ceased
  • 2008-03-12 CN CN2008800091959A patent/CN101641185B/zh not_active Expired - Fee Related
  • 2008-03-12 DK DK08716466.1T patent/DK2148763T3/da active
  • 2008-03-12 AT AT08716466T patent/ATE518623T1/de active
  • 2008-03-12 EP EP08716466A patent/EP2148763B8/de active Active
• 2009
  • 2009-09-15 US US12/586,066 patent/US7922565B2/en not_active Expired - Fee Related

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