Filter cartridge and dust extraction system

Abstract

Filter cartridge (100) with a fastening flange (110) for fastening the filter cartridge (100) in a dust extraction system (200), the fastening flange (110) comprising: - a bevel (111) which can be positively connected to a hook element (201) of the dust extraction system (200), and - a receiving element (112) arranged opposite the bevel (111) which can be non-positively connected to a fastening device (202) of the dust extraction system (200).

Description

The invention relates to a filter cartridge having a mounting flange for mounting the filter cartridge in a dust extraction installation and to a dust extraction installation.In emission-containing manufacturing processes, for example laser cutting or welding, pollutant particles are often released, which can have a very harmful effect in the ambient air. Therefore, the use of dust extraction systems is necessary, which detect, filter and release the pollutant-laden air, also referred to here as raw gas, into the environment in a cleaned manner. For this filtration process, use is made, inter alia, of filter cartridges which are manually installed and removed from the installations. A central role for the assembly of the filter cartridges is the filter head or fastening flange, via which the filter cartridge is mounted in the installation.Particularly in the case of larger dust extraction systems and correspondingly larger filter cartridges, the installation and removal or assembly process can prove to be difficult. Various installation mechanisms have become established for the assembly of a filter cartridge. Frequently, for example, the suspension is used via hook flanges, wherein these can be standardized. For example, a standardized 3-hook flange can be used to mount the filter cartridge in the plant on the raw gas side. However, to loosen the screw connections, work must be performed in the raw gas space. In other words, due to the mounting of the filter cartridge on the raw gas side, the work in the raw gas space is necessary during a filter change.It has therefore proved problematic to handle the filter cartridge in combination with the work necessary for the filter cartridge change in the raw gas region of the dust extraction installation, since contamination of the assembler can occur here. In order to avoid this, complex protective measures are required, which make the replacement of the filter cartridge more difficult.Against this background, it is an object of the invention to specify a filter cartridge for a dust extraction installation, with which the aforementioned disadvantages can be at least partially avoided. It would be desirable to be able to change the filter cartridge, in which the risk of contamination of the assembler is reduced or even the assembler can be prevented from being exposed to contamination in the raw gas space.This object is achieved by the subject matters of the independent claims. The dependent claims relate to embodiments.A first aspect of the invention relates to a filter cartridge for a dust extraction installation. In other words, the filter cartridge is designed for removing dust from raw gases and can be used for removing dust from raw gases.The filter cartridge has a fastening flange for fastening the filter cartridge in the dust extraction installation, for example at a filter cartridge receptacle of the dust extraction installation. The fastening flange has a bevel which can be connected in a form-fitting manner to a hook element of the dust extraction installation. Preferably, the chamfer can be shaped or formed corresponding to the hook element of the dust extraction installation, in particular to a hook element of a filter cartridge receptacle of the dust extraction installation. In other words, the bevel serves for the fitting into the hook element and the bevel can interact with the hook element in a positive-locking manner. In the mounted state of the filter cartridge in the dust extraction installation, the bevelling of the fastening flange of the filter cartridge is connected positively with the hook element.Furthermore, the filter cartridge has a receiving element arranged opposite the bevel, which can be connected in a force-fitting manner to a fastening device of the dust extraction installation. In other words, the receiving element is arranged in a section of the fastening flange which is opposite that section of the fastening flange in which the chamfer is located. The receiving element can interact with the fastening device in a force-fitting manner. In the mounted state of the filter cartridge in the dust extraction installation, the receiving element of the fastening flange of the filter cartridge is connected in a force-fit manner to the fastening device, in particular to a guide element of the fastening device.For fastening or mounting the filter cartridge in the dust extraction installation, the filter cartridge is initially hooked into the hook element of the dust extraction installation with the bevelling of its fastening flange. Preferably, the filter cartridge can already hold its position after this form-fitting connection of the bevel to the hook element without further fastening or alignment measures, which significantly facilitates the assembly process. A force-fit connection is then formed between the receiving element and the fastening device, whereby the filter cartridge is fastened to a filter cartridge receiving flange of the dust extraction installation in a spatially invariable and preferably gas-tight manner.The proposed filter cartridge simplifies the mounting and dismantling of the filter cartridge in a dust extraction installation considerably. In particular, it can be possible to change the filter cartridge without working in the raw gas region or at least with only a slight raw gas exposure, in that the force-fit connection between the receiving element and the fastening device is correspondingly formed and arranged. For example, the force-fit connection between the receiving element and the fastening device can be designed and arranged in such a way that the assembler only has to grasp the raw gas region with one arm up to a maximum of the shoulder, i.e., for example, a maximum of 100 cm or a maximum of 80 cm starting from a maintenance opening, but its head region always remains outside the raw gas region. Therefore, an assembler of the filter cartridge is exposed to significantly less contamination. When using a filter cartridge with hook flange according to the prior art, this is not possible, since work must be done in the raw gas space to loosen the screw connections.According to various embodiments, the filter cartridge may include a seal, wherein the seal is fitted into the mounting flange.The seal can be designed, for example, as a round seal or flat seal. For example, the seal can be arranged in a depression or groove of the fastening flange. Preferably, the seal can completely enclose a passage opening of the fastening flange. The escape of raw gas in the fastening region between the filter cartridge and the filter cartridge receptacle of the dust extraction installation can thereby be further reduced or even completely avoided.According to further embodiment variants, a passage opening of the fastening flange can have a circular cross section.This can contribute to an improvement in the flow conditions within the filter cartridge and thereby to an improvement in the filtering effect. In addition, the production of the filter cartridge and optionally its seal can be simplified as a result.According to further embodiment variants, the filter cartridge can have a filter material, wherein the filter material is connected to the fastening flange in a materially integral manner.The material-bonded connection can contribute to preventing undesired penetration of raw gas from the raw gas space into the clean gas space. The filter material can be glued, for example, in or on the fastening flange. Preferably, the filter material can be arranged in such a way that the passage opening of the fastening flange is completely surrounded by the filter material. The filtering effect can thereby be further increased.According to further embodiment variants, the filter cartridge can be designed for standing arrangement in the dust extraction installation.The mounting can be effected, for example, vertically or inclined with respect to the vertical. The filter cartridge can preferably be designed as a self-supporting, preferably cylindrical, filter cartridge.The stationary arrangement of the filter cartridge can have an advantageous effect on the flow conditions during the dust removal, so that the dust removal can be carried out with higher efficiency and / or effectiveness.A further aspect of the invention relates to a dust extraction installation for dust extraction of raw gas, having a filter cartridge receptacle which is designed for fastening a filter cartridge. In particular, a filter cartridge as described above may be attached to the filter cartridge receptacle. In this respect, reference is made in addition to the above description of the filter cartridge. The advantages of the filter cartridge are correspondingly associated with the dust extraction installation.The filter cartridge receptacle of the proposed dust extraction installation has a filter cartridge receiving flange and a hook element which is arranged on the filter cartridge receiving flange and can be connected in a form-fitting manner to a bevel on a fastening flange of the filter cartridge. The hook element can be designed, for example, in the manner of a claw. The hook element can guide and / or position the inserted filter cartridge. For example, the hook element can be designed for positionally stable mounting of the filter cartridge on the filter cartridge receiving flange.Preferably, the hook member may be shaped or formed corresponding to a chamfer of a mounting flange of a filter cartridge. In other words, such a bevel can be fitted into the hook element and the hook element can interact positively with the bevel. In the mounted state of the filter cartridge in the dust extraction installation, the bevelling of the fastening flange of the filter cartridge is connected positively with the hook element.On the filter cartridge receiving flange, a fastening device is also arranged opposite the hook element, which fastening device can be connected in a force-fit manner to a receiving element on the fastening flange of the filter cartridge. In the mounted state of the filter cartridge in the dust extraction installation, the fastening device is connected in a force-fitting manner to the receiving element of the fastening flange of the filter cartridge.According to various embodiments, the fastening device can have a clamping part and a screw connection. In this case, the clamping part can be connected in a force-fitting manner to the receiving element on the fastening flange of the filter cartridge by means of the screw connection.In other words, by tightening or loosening the screw connection, a frictional connection can be established or released again between clamping part and receiving element. The screw connection can be arranged and formed, for example, in such a way that the frictional connection is established or released again by tightening or releasing the nut of the screw connection. For example, the screw connection consisting of a screw and a nut with a stop can be positioned in such a way that the nut is accessible from the outside and can be actuated in a simple manner.The screw connection can preferably be mechanically connected to the filter receiving flange, so that the position of the clamping part with respect to the filter cartridge receiving flange can be varied by means of the screw connection. Thus, the threaded connection can mechanically connect the clamp member to the filter cartridge receiving flange.In the released state, i.e. with the screw connection released, the clamping part can be freely movable.According to further embodiment variants, the fastening device can have a guide element.Optionally, two guide elements can be present, e.g. on both sides of the clamping part. Preferably, the guide element can be designed to be connectable in a form-fitting manner to the fastening flange of the filter cartridge, e.g. to the receiving element of the fastening flange. For example, the guide element can guide the fastening flange of the filter cartridge by interacting with the fastening flange in a form-fitting manner. In particular, a lateral guidance can be realized.The guide element can be arranged in a fixed position on the filter cartridge receiving flange.By means of the guide element, an accurate positioning, e.g. centering, of the filter cartridge can be effected, whereby errors in the assembly of the filter cartridge and a subsequent malfunction of the dust extraction installation can be avoided. In addition, the filter cartridge can also be mounted by less trained personnel.Optionally, it can be provided that the clamping part can be connected to the guide element in a form-fitting manner. For example, a positive connection between the clamping part and the guide element(s) can be effected or released by tightening or releasing the screw connection of the fastening device.For fastening or mounting the filter cartridge, it can be provided that after positioning the filter cartridge with its bevel in the hook element, the clamping part is hooked into the guide element. Tightening the screw joint forces the clamping member against the receiving member, thereby forcing the mounting flange against the filter cartridge receiving flange. The guide element serves here for centering the fastening flange.According to further embodiment variants, the filter cartridge receptacle can be designed for the stationary mounting of the filter cartridge.According to further embodiment variants, the dust extraction installation can have a filter cartridge as described above, wherein the filter cartridge is fastened to the filter cartridge receptacle, in particular by means of its fastening flange to the filter cartridge receptacle flange.According to further embodiment variants, the force-fit connection between the receiving element and the fastening device can be formed and arranged or can be formed and arranged such that a distance between a maintenance opening for mounting or dismounting the filter cartridge and the force-fit connection is at most 100 cm, preferably at most 80 cm.According to further embodiment variants, only a single force-fit connection can be formed or formed between the filter cartridge and the dust extraction installation.If only a single force-fit connection is present, the assembly or disassembly merely comprises the production or detachment of this single connection. The assembly and disassembly of the filter cartridge can therefore be effected rapidly and in a simple manner. The assembler is consequently only exposed to a possible contamination over a short period of time.The invention is explained below by way of example with reference to the attached figures on the basis of preferred embodiments, wherein the features illustrated below can both be used individually and represent an aspect of the invention in various combinations with one another. The following are shown: FIG. 1 shows a schematic illustration of an exemplary dust extraction installation; FIG. 2 ashows a schematic representation of an exemplary filter cartridge in side view; FIG. 2 bshows the filter cartridge of FIG. 2 ain a perspective view; FIG. 3 ashows a schematic representation of an exemplary filter cartridge mounted in a dust extraction system in a side view; FIG. 3 bshows the filter cartridge of FIG. 3 amounted in the dust extraction installation in a perspective view; FIG. 4a is a schematic illustration of a mounting flange of a filter cartridge in the non-assembled state together with the associated filter cartridge receptacle of a dust extraction installation; and FIG. 4 bshows the fastening flange of FIG. 4 amounted on the filter cartridge receptacle of FIG. 4 a.FIG. 1 shows an exemplary dust extraction installation 200. The dust extraction installation 200 has a housing 210 which is bounded by housing walls 211 and in which a plurality of filter cartridges 100 are arranged. In the upper region of the housing 210, a raw gas inlet opening 220 is arranged in a vertical housing wall 211, through which the raw gas 230 to be treated flows into the raw gas space 240. In the lower region of the housing 210 are the clean gas outlet openings 250.The filter cartridges 100 are arranged between the raw gas inlet opening 220 and the clean gas outlet openings 250, with respect to the flow direction of the raw gas 230 to be dedusted. The filter cartridges 100 are self-supporting cylindrical filter cartridges.The filter cartridges 100 are detachably mounted with their open ends standing on a respective filter cartridge receptacle 203. The filter cartridge receptacles 203 are arranged on a support plate 270 which is designed as a plane inclined with respect to the horizontal, so that the filter cartridges 100 are arranged inclined with respect to the vertical. Below the support plate 270 is a collecting container 280 for filtered dust.Referring now to Figure 2, an exemplary filter cartridge 100 is schematically illustrated, which is formed as a self-supporting cylindrical filter cartridge. For fastening the filter cartridge 100 in a dust extraction installation 200, the filter cartridge 100 has a fastening flange 110. The through hole 114 of the mounting flange 110 has a substantially circular cross section. A filter material 115 is adhesively bonded into the fastening flange 110 and is thereby connected to the fastening flange 110 in a materially integral manner.The fastening flange 110 is substantially axle-symmetrical, wherein the axis of symmetry runs through the center of the cross section of the passage opening 114. A chamfer 111 is located on one side of the fastening flange 110, i.e. an edge of the fastening flange 110 is chamfered in the direction of the filter material 115 starting from the upper side or mounting surface of the fastening flange 110, i.e. the surface which is in contact with the filter cartridge receiving flange 204 of the dust extraction installation 200 after mounting. The bevel 111 is designed in such a way that it can be connected in a form-fitting manner to a hook element 201 of the dust extraction installation for mounting the filter cartridge 100 in a dust extraction installation 200.Opposite the bevel 111, a receiving element 112 is arranged on the fastening flange 110. The receiving element 112 has a step in the direction of the filter material 115 starting from the mounting surface of the fastening flange 110. The receiving element 112 is designed such that it can be connected in a force-fitting manner to a fastening device 202 of the dust extraction installation 200 for mounting the filter cartridge 100 in a dust extraction installation 200.In addition, a seal 113 is fitted into the mounting surface of the fastening flange 110, which seal surrounds the passage opening 114 in a circular manner. In the exemplary embodiment, the seal 113 is designed as a round seal.FIG. 3 shows an exemplary filter cartridge 100 mounted upright in a dust extraction plant 200. For example, the filter cartridge 100 can be configured as described with reference to FIG. 2, and the dust extraction installation 200 can be configured as described with reference to FIG. 1. To clarify the mounting situation, FIG. 3 shows only a section of the dust extraction installation 200, namely the carrier plate 270 with the filter cartridge receptacles 203 arranged thereon. For further details of the dust extraction installation 200, reference is made to FIG. 1.In total, four filter cartridge receptacles 203 of identical construction are present (see FIG. 3 b), i.e. in total four filter cartridges 100 can be mounted in the dust extraction installation 200. It should be noted that, for the sake of better clarity, some components of the filter cartridge receptacle 203 are only identified on one of the four filter cartridge receptacles 203, but are present analogously in the remaining three filter cartridge receptacles 203.Each of the filter cartridge receptacles 203 has a filter cartridge receptacle flange 204 which is connected in a form-fit and force-fit manner to the fastening flange 110 of the filter cartridge 100 in order to mount the filter cartridge 100. Each filter cartridge receiving flange 204 is substantially axis symmetrical, with the axis of symmetry passing through the center of the cross section of the port. A hook member 201 is disposed on the filter cartridge receiving flange 204 on one side. This hook element 201 can be connected in a form-fitting manner to the bevel 111 of the filter cartridge 100 and enables a positionally stable mounting of the filter cartridge 100.Opposite the hook element 201, a fastening device 205 is arranged on the filter cartridge receiving flange 204 which can be connected in a force-fit manner to the receiving element 112 on the fastening flange 110 of the filter cartridge 100. For this purpose, the fastening device 205 has a clamping part 205 and a screw connection 206 with a screw 209 and a nut 208 (see FIG. 4 ). The clamping part 205 is fastened to the filter cartridge receptacle 203 by means of the screw connection 206, but is substantially freely movable when the screw connection 206 is released. By actuating the screw connection 206, in the exemplary embodiment by tightening or releasing the nut 208, the clamping part 205 can be connected to the receiving element 112 in a force-fitting manner or can be released from the receiving element 112.In addition, the fastening device 202 has two guide elements 207 which are arranged on both sides of the clamping part 205 in a spatially invariable manner and serve for centering the fastening flange 110 during the assembly of the filter cartridge 100.Further details of the filter cartridge 100 and the dust extraction system 200 can be seen in FIGS. 4 aand 4 b.To mount the filter cartridge 100 in the dust extraction installation 200, in a first step the bevel 111 of the filter cartridge 100 is hooked into the hook element 201 of the filter cartridge receptacle 203 and is thus connected in a positive-locking manner. Even without further fastening, the filter cartridge 100 is held by the form-fitting connection and its standing arrangement, which significantly facilitates the further mounting process.In a further assembly step, the clamping part 205 is hooked into the guide element 207, that is to say is connected in a positive-locking manner to the guide element 207 (see FIG. 4 b ). Tightening the threaded connection 206 forces the clamping member 205 against the receiving member 112 of the mounting flange 110 of the filter cartridge 100, thereby forcing the mounting flange 110 against the filter cartridge receiving flange 204. The two guide elements 207 serve here for centering the fastening flange 110, so that incorrect assembly and possibly associated leaks can be avoided.For dismantling the filter cartridge 100, the method steps are carried out in the reverse sequence, i.e. firstly the screw connection 206 is released and subsequently the bevel 111 is hooked out of the hook element 201 and removed.Advantageously, the filter cartridge 100 can be mounted or dismounted in the dust extraction installation 200 by forming or releasing a single force-fit connection, so that the working time of the assembler in the raw gas space 240 and thus in a possibly contaminated area can be kept very short. Due to the special design of the fastening flange 110 of the filter cartridge 100 and the filter cartridge receptacle 203 of the dust extraction installation 200, the replacement of the filter cartridges 100 can be carried out easily and quickly. Assembly errors can be largely avoided and the operational reliability of the dust extraction installation 200 can thereby be increased.List of reference characters100 Filter cartridge 110 Fastening flange 111 Bevel 112 Receiving element 113 Seal 114 Passage opening 115 Filter material 200 Dust extraction installation 201 Hook element 202 Fastening device 203 Filter cartridge receptacle 204 Filter cartridge receiving flange 205 Clamping part 206 Screw connection 207 Guide element 208 Nut 209 Screw 210 Housing 211 Housing wall 220 Raw gas inlet opening 230 Raw gas 240 Raw gas space 250 Clean gas outlet opening 270 Carrier plate 280 Collecting container

Claims

Filter cartridge (100) having a fastening flange (110) for fastening the filter cartridge (100) in a dust extraction installation (200), the fastening flange (110) having: - a bevel (111) which can be connected in a positively locking manner to a hook element (201) of the dust extraction installation (200), and - a receiving element (112) which is arranged opposite the bevel (111) and can be connected in a positively locking manner to a fastening device (202) of the dust extraction installation (200).The filter cartridge (100) of claim 1, comprising a seal (113), wherein the seal (113) is fitted into the mounting flange (110).The filter cartridge (100) of any preceding claim, wherein a passage opening (114) of the mounting flange (110) has a circular cross-section.Filter cartridge (100) according to one of the preceding claims, comprising a filter material (115), wherein the filter material (115) is connected to the fastening flange (110) in a materially integral manner.The filter cartridge (100) of any preceding claim, wherein the filter cartridge (100) is configured for standing in the dust extraction system (200).Dust extraction installation (200) for removing dust from raw gas (230), having a filter cartridge receptacle (203) designed for fastening a filter cartridge (100), the filter cartridge receptacle (203) having: - a filter cartridge receptacle flange (204), - a hook element (201) arranged on the filter cartridge receptacle flange (204), which can be connected in a positively locking manner to a bevel (111) on a fastening flange (110) of the filter cartridge (100), and - a fastening device (205) arranged opposite the hook element (201) on the filter cartridge receptacle flange (204), which fastening device can be connected in a frictionally locking manner to a receiving element (112) on the fastening flange (110) of the filter cartridge (100).Dust extraction installation (200) according to claim 6, wherein the hook element (201) is designed for positionally stable mounting of the filter cartridge (100).Dust extraction installation (200) according to claim 6 or 7, wherein the fastening device (202) has a clamping part (205) and a screw connection (206), wherein the clamping part (205) can be connected to the receiving element (112) in a force-fit manner by means of the screw connection (206).Dust extraction installation (200) according to one of Claims 6 to 8, wherein the fastening device (202) has a guide element (207).Dust extraction installation (200) according to claim 9, wherein the guide element (207) is designed to center the fastening flange (110) of the filter cartridge (100).Dust extraction installation (200) according to claim 9 or 10, wherein the clamping part (205) can be connected to the guide element (207) in a form-fitting manner.Dust extraction installation (200) according to one of Claims 6 to 11, wherein the filter cartridge receptacle (203) is designed for the stationary mounting of the filter cartridge (100).Dust extraction installation (200) according to one of Claims 6 to 12, having - a filter cartridge (100) according to one of Claims 1 to 5, wherein the filter cartridge (100) is fastened to the filter cartridge receptacle (203).Dust extraction installation (200) according to one of claims 6 to 13, wherein the force-fit connection between the receiving element (112) and the fastening device (202) can be formed and arranged in such a way that a distance between a maintenance opening for mounting or dismantling the filter cartridge (100) and the force-fit connection is at most 100 cm, preferably at most 80 cm.Dust extraction installation (200) according to one of Claims 6 to 14, wherein only a single force-fit connection can be formed between the filter cartridge (100) and the dust extraction installation (200).

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