Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
  • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
  • B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
  • B01D35/0276—Filtering elements with a vertical rotation or symmetry axis mounted on tanks or reservoirs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
  • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
  • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
  • B01D35/153—Anti-leakage or anti-return valves
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2201/00—Details relating to filtering apparatus
  • B01D2201/40—Special measures for connecting different parts of the filter
  • B01D2201/4015—Bayonet connecting means

Definitions

• the invention relates to a filter device with at least one filter element which can be accommodated in a filter housing which can be fluidly connected by means of a connection device via fluid connections to a fluid device, in particular in the form of a hydraulic tank, and detachably attached to the fluid device by means of a fastening device.
• Such filter devices are freely available in a variety of designs and embodiments on the market. Among other things, they serve to filter contaminants in fluids, such as hydraulic oil, out of them. Contamination of the hydraulic oil occurs during the assembly and commissioning of the respective hydraulic system, and in addition to this initial contamination, contamination during operation can occur, for example due to the ingress of dirt on the hydraulic tank due to insufficient tank ventilation, pipe penetrations, piston rod seals and the like.
• the filter device may be expedient to arrange the filtration directly in the area of the hydraulic tank, for example by placing the filter device directly in the tank installed, the hydraulic oil removed from the tank contents for filtering dirt is fed directly to a filter element, which is in a filter housing is received, and the fluid cleaned in this way is then returned to the tank contents via the filter housing.
• the filter device only cleans the tank contents.
• the filter device conveys appropriately filtered and cleaned fluid into a hydraulic circuit of the working machine, in order to return the fluid from there to the tank, which during such a circulation in the hydraulic circuit is also contaminated with solid particles.
• the filter device In the case of solutions in which the filter device only filters the tank content by removing fluid from the tank content, filtering it and then immediately feeding it back into the tank content, it may be expedient if the filter element is to be changed, the content of the fluid device , especially in the form of the hydraulic tank, against the filter housing.
• the filter housing with the used filter element can be completely removed from the fluid device, in particular the tank, and replaced by a filter housing with a fresh filter element, without the operation of the respective hydraulic system having to be interrupted.
• tedious and time-consuming measures have to be carried out in connection with a change of the filter housing. In a complicated manner, pipework belonging to the connection device must be separated from one another and sealed.
• the object of the invention is to provide a filter device in which the measures to be carried out for changing the filter element can be carried out particularly easily and safely, so that trouble-free operation of the fluid device in question is ensured. According to the invention, this object is achieved in its entirety by a filter device having the features of patent claim 1.
• a bayonet lock is provided as a fastening device, by means of which the filter housing can be detachably attached to the fluid device, and that a locking part can be controlled by the rotational movement of the filter housing when the bayonet lock is released and locked, which locks the relevant fluid connections and releases, filter changes can be carried out with the highest degree of safety and in a particularly simple and convenient manner. This is achieved in that the fluid connections are locked and released automatically when the filter housing is removed and attached, which in turn takes place in a particularly simple and convenient manner by releasing and locking a bayonet lock.
• a rotary slide valve which is rotatably mounted on the fluid device is provided as the blocking part.
• the rotary movements that occur when the bayonet lock is actuated can be converted particularly easily into corresponding rotary control movements of the rotary slide valve.
• the filter housing has a valve biased into the closed position both at the inlet opening through which the fluid enters the dirty side of the filter housing and at the outlet opening for filtered fluid.
• the openings of the filter housing are automatically blocked when the filter housing is removed from the fluid device, this can be moved to another location, without taking precautions against inadvertent leakage of fluid from the filter housing, to another location arrange for the filter element to be changed, in which case further maintenance operations can then be carried out.
• Further advantageous embodiments of the filter device according to the invention are the subject of the other subclaims.
• FIG. 1 shows a longitudinal section of a hydraulic tank with a filter device installed in a tank compartment according to an exemplary embodiment of the invention, the filter device being in the operating state;
• Figure 2 is a top view of the hydraulic tank of Figure 1;
• FIG. 3 shows a section similar to FIG. 1, wherein a fuel cap which enables access to the tank compartment is open and the filter device for removal from or installation in the tank compartment is shown in a rotational position which is in comparison with FIG. 1 Is rotated 90 °;
• FIG. 4 shows a top view of the tank from FIG. 3 with the opened tank cap; 5 shows a section of the area designated by I in FIG. 1 drawn on a larger scale than FIG. 1-4; and FIG. 6 shows a perspective view of the connection plate of a fluid device (hydraulic tank) with an associated exemplary embodiment of the filter device, the filter housing being shown in FIG loosened fastening device is removed from the connection plate.
• a fluid device hydroaulic tank
• FIG. 1 to 4 show a fluid device in the form of a hydraulic tank 1 with a separate tank compartment 3 built into it, which can be connected to the remaining tank contents only via fluid connections 5 and 7, but is otherwise closed off from the remaining tank contents.
• the Fluid connections 5 and 7 are located at the bottom end of the tank compartment 3, which is formed by a flat connection plate 9.
• the connection plate 9 forms the support for the filter housing 11 of the filter device according to the invention which can be attached to it by means of a releasable fastening device.
• the fluid connection 5 When attached to the connecting plate 9, in the operating position of the filter housing 1 1, the fluid connection 5 forms the inlet for the supply of fluid to be cleaned to the dirt side in the interior of the filter housing 1 1, while the outflow of cleaned fluids after it has passed the filter element 13 in the filter housing , takes place through the fluid connection 7.
• FIG. 5 shows an operating state in which the filter device is installed in the tank compartment 3 when the fuel cap 15 is closed and the filter housing 11 is in the position corresponding to the operating state of the device.
• This operating state is shown more clearly in FIG. 5.
• the filter housing 1 1 is locked to the connection plate 9 by means of a bayonet catch, which has a bayonet ring 17 (see also FIG. 6) fastened to the connection plate 9, which has radially projecting, diametrically opposed bayonet ribs on the associated end edge of the filter housing 19 (Fig. 5 and 6) cooperates.
• a bayonet catch which has a bayonet ring 17 (see also FIG. 6) fastened to the connection plate 9, which has radially projecting, diametrically opposed bayonet ribs on the associated end edge of the filter housing 19 (Fig. 5 and 6) cooperates.
• the bayonet ribs 19 can be inserted into the bayonet guide of the bayonet ring 17 via recesses 21 (FIG. 6).
• the filter housing 11 is locked on the connecting plate 9 by means of the bayonet lock 17, 19.
• This rotary position corresponding to the operating state of the filter device is shown in FIGS. 1 and 5, while FIGS. 3 and 6 show the rotary position in which the filter housing 11 can be lifted off the connecting plate 9 when the bayonet lock is released.
• the filter housing 1 1 is Completed e.ndseite by a cover part 23, from which a handle 25 provided for the manual rotation of the filter housing 1 1 extends axially away from the cover part 23 (in the drawing upwards).
• the axial protrusion of the handle 25 makes it possible to close the tank cap 15 only in the rotational position of the filter housing 11 corresponding to the operating state when the bayonet lock is locked, namely when the projecting section of the handle 25 is longitudinal an arched indentation 27 extends in the tank cap 15. If, on the other hand, the filter housing 11 is in the rotational position shown in FIG. 3, where the projecting section of the handle 25 extends transversely to the indentation 27 and the fuel cap 15 accordingly cannot be fully closed, then the operator is signaled that the filter housing is not properly locked by means of the bayonet catch and the filter device is therefore not in its operating state.
• passages 29 and 31 of a rotary slide valve 33 are aligned with the fluid connections 5 and 7, respectively.
• the rotary slide 33 is rotatably mounted on the pin of a collar screw 35 screwed into the connecting plate 9.
• the rotary valve 33 has the passages 29 and 31 into the interior of the filter housing 1 1 continuing connecting pieces 37 and 39 which pass through an inlet opening 49 of the filter housing 11 and an outlet opening 43 of the filter housing 11.
• the inlet opening 41, through which uncleaned fluid enters the filter housing 11, and the outlet opening 43, through which cleaned fluid exits the filter housing 11, are located in a bottom part 45 of the filter housing 11.
• the bottom part 45 is opposite the connecting piece 37, 39 by O-rings seated in ring grooves 63 (not shown) and against the surrounding wall of the filter housing 1 1 by O-rings (not shown) seated in annular grooves 65.
• the rotating bottom part 45 takes along the connecting pieces 37 and 39 of the rotary valve 33, which act as rotational drivers, so that the latter is rotated and its passages 29, 31 with the Fluid connections 5 and 7 are out of alignment.
• the fluid connections 5 and 7 are closed by the rotary slide 33. In this position rotated by 90 ° with respect to FIGS. 1 and 5, which is indicated in FIG. 6, the bayonet lock 17, 19 is released, so that the filter housing 11 can be lifted off.
• control lugs 47 which project into the interior of the filter housing 11 at the end of the connecting pieces 37 and 39, the blocking bodies 49 of blocking valves 51 and 53 open against the closing force of the associated closing springs 55 and 57, respectively stopped, by lifting the filter housing 11 the blocking bodies 49 are now applied to the valve seats 59 and 61 by the closing springs 55, 57 in order to close the inlet opening 41 and outlet opening 43 of the valve housing 11.
• connection plate 9 when the filter housing 11 is removed from the connection plate 9, it is secured against leakage of fluid, so that the filter housing 11 can be transported safely without replacement of the filter element or other maintenance, without the risk of environmental pollution from leaking leakage , If a filter housing 11 containing an unused filter element 13 is moved towards the connection plate 9, so that the bayonet ribs 19 enter the bayonet guide of the bayonet ring 17 through the recesses 21, then the connection sleeve zen 37, 39 of the rotary valve 33, the inlet opening 41 and the outlet opening 43 of the valve housing, so that the above control lugs 47 unlock the locking body 49 of the valves 51 and 53.
• the rotary slide 33 reaches the rotational position shown in FIGS. 1 and 5, so that the fluid connection to the tank contents is automatically established in the course of fastening the filter housing 11 to the connection plate 9.
• the filter housing is rotated through 90 ° to release the bayonet catch, the fluid connection to the tank contents is automatically blocked when the rotary slide 33 assumes the position shown in FIG. 3.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Filtration Of Liquid (AREA)
• Surgical Instruments (AREA)
• Centrifugal Separators (AREA)
• Separation By Low-Temperature Treatments (AREA)
• Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34962692

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (54)

Citations (4)

Family Cites Families (9)

• 2004
  • 2004-03-20 DE DE102004014149A patent/DE102004014149B4/de not_active Withdrawn - After Issue
• 2005
  • 2005-03-03 JP JP2007504282A patent/JP5112852B2/ja not_active Expired - Lifetime
  • 2005-03-03 WO PCT/EP2005/002215 patent/WO2005092472A1/de not_active Ceased
  • 2005-03-03 EP EP05715679A patent/EP1727607B1/de not_active Expired - Lifetime
  • 2005-03-03 DE DE502005003566T patent/DE502005003566D1/de not_active Expired - Lifetime
  • 2005-03-03 US US10/593,473 patent/US7459078B2/en not_active Expired - Lifetime
  • 2005-03-03 AT AT05715679T patent/ATE390954T1/de active

Patent Citations (4)

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