EP3714187A1 - Device for clamping a stuffing box packing - Google Patents
Device for clamping a stuffing box packingInfo
- Publication number
- EP3714187A1 EP3714187A1 EP18786699.1A EP18786699A EP3714187A1 EP 3714187 A1 EP3714187 A1 EP 3714187A1 EP 18786699 A EP18786699 A EP 18786699A EP 3714187 A1 EP3714187 A1 EP 3714187A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamping elements
- stuffing box
- clamping
- gland
- rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/184—Tightening mechanisms
- F16J15/185—Tightening mechanisms with continuous adjustment of the compression of the packing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/184—Tightening mechanisms
Definitions
- the invention relates to a device for clamping a stuffing box pack.
- the applicant distributes pressure rotary filters for many years.
- pressure rotary filters of this kind the sealing of the process spaces subjected to overpressure to the environment usually takes place by means of a gland packing between the rotating filter drum and the filter housing.
- the stuffing box packing In order to be able to reliably ensure the seal even after a longer period of operation, the stuffing box packing must be retensioned at regular intervals. The result of the re-tensioning and thus the quality of the seal is highly dependent on the experience and careful operation of the operator.
- the gland retainer Due to the decreasing elasticity of the stuffing box packing material as well as gland packing wear on the sliding surface to the filter drum, the gland retainer must be retightened at regular intervals to maintain the sealing effect of the gland packing.
- Pressure rotary filter comprising the stuffing box, which abuts against a packing to be sealed by the stuffing box and not belonging to the device, a stuffing box, which rests against a free side of the stuffing box, a plurality of clamping elements which the stuffing box against the stuffing box and thus the stuffing box push against the parent assembly, at least two clamping elements in such a
- the device according to the invention can prevent that only individual clamping elements are retightened, so that a tilting of the stuffing box goggles avoided and the stuffing box can be applied axially mechanically with the correct contact pressure on the stuffing box gland.
- a corresponding cut-off part can be provided on the device.
- one of the clamping elements may be designed such that it can be brought into engagement with a tool, such as a torque wrench.
- a typical torque to be set on the torque wrench for such applications is, for example, about 330 Nm.
- the gland packing may include multiple gland packing rings.
- the stuffing box packing or the stuffing box packing rings can / can for example, be made of braided PTFE fiber material.
- the axial tension of the gland packing or the stuffing box packing rings can also generate a radial force between gland packing and rotating filter drum and to the filter housing, which can cause the sealing effect against the internal pressure.
- the clamping elements may for example be made of metal, in particular of steel with the material designation 1.4462.
- all the clamping elements of the device can be connected to one another in such a way in a torque-transmitting manner that a rotation of one of the clamping elements causes a rotation of all other clamping elements. This means that all clamping elements are coupled with each other and no clamping element can be used
- the tensioning elements connected in a torque-transmitting manner can be connected via at least one chain or a belt.
- the clamping elements may comprise at least one wheel, for example a gear, with which the chain or the belt meshes.
- a tensioning element may also comprise more than one wheel.
- a chain each connect two adjacent clamping elements, for which purpose each clamping element, seen in the direction of a rotation axis of the clamping element, may comprise two gears arranged one behind the other.
- clamping elements are equal to each other, but 360 ° is not a multiple of a single angular distance, i. E. that several are the same
- This clearance can, for example, for access to the pressure rotary filter with a
- Spüllanze or the like may be provided.
- chains can be insensitive to temperature, humidity and dirt.
- the chains may for example be made of metal, in particular stainless steel.
- a chain or belt tensioner via which the voltage can be adjusted automatically or manually.
- the chains can also run without bias.
- all clamping elements can be connected to one another via a single chain or a single belt.
- the chain or the belt can in this case with the clamping elements, with respect to the pitch circle of the clamping elements, respectively at its radially outer side into engagement.
- the chain or belt can also be alternately provided with the clamping elements with an inner and an outer side of the clamping elements or the wheels of the clamping elements. elements in the form of a circle forming snake line engaged.
- the chain pitch and number of teeth of the wheels of the clamping elements can be chosen so that a better wrap of the wheels through the chain and thus a better power transmission is achieved than in a merely radially outboard of the clamping elements adjacent chain.
- the clamping elements can be subdivided into at least two subgroups, wherein clamping elements are in each case connected only with clamping elements of the same subgroup in a torque-transmitting manner. Accordingly, it may be necessary for each subgroup
- the clamping elements can be designed as a nut displaceable on a stud.
- the stud bolts may be inserted into a housing of the printer filter, e.g. screwed in, be.
- the stuffing box gland can then be attached to these stud bolts, with the stud bolts protruding through the stuffing box gland.
- the clamping elements which are designed as nuts, can now be screwed onto the stud bolts until they push the stuffing box glands with a predefined force against the stuffing box packing.
- the nuts and the stud bolts can also be tolerated in length and have a central bore, which can be possible by means of a depth gauge exact adjustment of the parallelism of the individual wheels to each other.
- the theoretical maximum deviation would be half Division on the wheel. For example, if a nut has a gear with 15 teeth, a thirtieth rotation of the nut or gear at a pitch of 2 mm results in a movement of 0.07 mm in the axial direction of the nut or stud.
- the nuts may for example be made of metal, in particular
- the stud bolts can be provided with a support surface.
- the stability of the stud bolts in the housing of the pressure rotary filter can be increased and, on the other hand, an exact protrusion, ie. H.
- An assembly length for corresponding attachment parts, such as the stuffing box gland, can be guaranteed.
- the clamping elements can be connected to a ring gear in such a way that a rotation of the ring gear causes a rotation of the clamping elements associated therewith. Analogous to the ring gear of a planetary gear, the ring gear can be in engagement with the toothed wheels of the clamping elements.
- rotation of the sprocket may cause synchronized rotation of the spools so that all the spools, for example, in the case of the above-mentioned nut and stud, tend to move together in an axial direction toward the gland packing or can be relocated away from it.
- the sprocket may also be partially formed with teeth.
- a ring gear to be provided only at predetermined locations with teeth, which in turn with the gears of the clamping elements in
- the sprocket can also be designed in several parts. In this way, an assembly of the ring gear to the clamping elements can be simplified so that the ring gear first brought into engagement with the clamping elements and then to a complete sprocket ring
- the device may further comprise a motor which drives a tensioning element.
- the engine may be configured to be engageable with the manual retighten interface. In this way, existing systems can be retrofitted with such a motor. A manual tightening can be omitted by the provision of the engine.
- the engine can be adjusted to a desired maximum torque, d. H. limited.
- the device may comprise a measuring device which is adapted to measure a force which is transmitted from the clamping elements via the gland to the gland packing. This can be done, for example, in at least one of the following ways:
- an axial contact pressure of an innermost gland packing ring to a gland packing shoulder i. one of the stuffing box gland farthest from the stuffing box gland to a paragraph of the housing against which this gland packing ring is applied, are measured.
- an axial contact pressure of the stuffing box gland to the stuffing box packing can be measured.
- a bias of the clamping elements, in particular of the nuts and studs, are detected by the measuring device. But it can also be a Wegunk the Nachziehweges done on the stuffing box goggles.
- the device can also be set up to drive, on reaching or dropping below a predetermined threshold value of the force measured by the measuring device, via the motor, the clamping element connected thereto.
- a cause for the damage or failure of the stuffing box packing can not be set up to drive, on reaching or dropping below a predetermined threshold value of the force measured by the measuring device, via the motor, the clamping element connected thereto.
- a sliding element can be arranged between the clamping elements and the gland packing. The friction force to be overcome between clamping element and stuffing box gland when tightening the
- Clamping elements can be reduced in this way. Furthermore, wear and thus a dimensional change of the clamping elements and / or the Stopfbuchsbrille can be reduced or even completely avoided.
- At least one of the clamping elements a transmission, in particular a reduction gear can be arranged.
- a transmission in particular a reduction gear
- Connecting elements e.g. the chain (s), force applied to the clamping elements.
- This can be particularly advantageous in pressure rotary filters, which work with a high overpressure and thus a high
- FIG. 1 is a side cross-sectional view of a section of a pressure rotary filter, which is equipped with an embodiment of the device according to the invention
- Fig. 3 is a perspective view of the embodiment of the device according to the invention according to Figures 1 and 2; 4 shows a perspective view of a second embodiment of the device according to the invention;
- FIG. 5 shows a perspective view of a third embodiment of the device according to the invention.
- FIG. 6 is a side cross-sectional view of a detail of the embodiment of FIG. 5.
- Fig. 1 is an embodiment of the device according to the invention, which is installed in a rotary pressure filter 12, generally 10
- a stud bolt 18 is screwed into a threaded hole 14 of a housing 16 of the rotary pressure filter 12.
- the stud bolt 18 has a shoulder 20, which rests against the housing 16 when the stud bolt 18 is completely screwed in.
- An external thread 22 of the stud 18 protrudes through a through hole 24 of a gland 26 through.
- the gland 26 is adapted to press against a gland packing 28 which includes a plurality of gland packing rings 30 therein.
- Stud bolt 18 is a clamping element 32 screwed, which is designed here as a nut.
- the nut 32 includes two gears 34 and 36, also called “roller chain wheels", wherein the gear 34 in an axial direction of the stud 18 and the nut 32 with respect to the stuffing box goggles 26 farther away, d. H. farther outside than the gear 36.
- the outer gear 34 meshes with an outer chain 38 and the inner gear 36 meshes with an inner chain 40th
- Fig. 1 it can be seen that the inner chain 40 connects the cut in Fig. 1 shown nut 32 with an inner gear 36 'of an adjacent clamping element 32'.
- the outer chain 38 connects the nut 32 with a clamping element adjacent to the other side thereof, which is not shown in FIG.
- a rotation of the nut 32 is transmitted from the two chains 38 and 40 in a synchronized manner to the adjacent clamping element 32 'and to the other side adjacent clamping element, which is not shown.
- This displacement causes a force application of the nut 32 the stuffing box packing 26 and then a force on the stuffing box 28.
- the stuffing box 28 is then urged in the direction of the stuffing box shoulder 31, whereupon the stuffing box 28 bulges radially inwardly against a filter drum 33.
- a sliding element 42 in the form of a sliding disk is arranged between the nut 32 and the stuffing box gland 26.
- the nut 32 here has a through hole 44. Through this through-hole 44 can be measured with a depth gauge, as far as the nut 32 is screwed onto the stud 18.
- a depth gauge for this purpose, both the stud bolt 18, in particular the dimension from the shoulder 20 to an opposite end of the stud bolt 18, and a corresponding overall length of the nut 32 should be tightly tolerated and known.
- FIG. 2 shows a further section of the device 10 according to the invention or of the rotary pressure filter 12 according to the embodiment shown in FIG. 1. Therefore, reference is explicitly made to the description of FIG. 1. 1 analogous parts in Fig. 2 are provided with the same reference numerals as in Fig. 1.
- Fig. 2 is also a stud 18 can be seen, which is screwed into the housing 16 of the rotary pressure filter 12.
- a clamping element 46 is screwed, which presses on a seal ring 42 on the gland 26.
- the clamping element 46 is analogous to the clamping element 32 also as Nut formed, wherein the part of the nut 46, which is opposite to the screwed onto the external thread 22 of the stud bolt 18 part, protrudes through a protective cover 48 of the device 10 to the outside.
- an interface 50 is provided, on which an operator of the device 10 can apply a tool, such as a torque wrench.
- a motor (not shown) attack such as an electric motor.
- a rotation of the nut 46 is transmitted via an outer chain 52 and an inner chain 54 to adjacent clamping elements.
- To further support the nut 46 is mounted on a plain bearing bush 56 in the protective cover 48.
- FIG. 3 The embodiment of the device 10 according to the invention described in FIGS. 1 and 2 is shown in FIG. 3 free of the other components of the rotary pressure filter 12.
- the stuffing box packing 28 or its rings 30 can be seen, against whose one side the stuffing box gland 26 rests.
- twelve clamping elements 32 are arranged, of which one is designed as a clamping element 50 provided with a clamping element, in the sense of the clamping element 46 of FIG. 2.
- the clamping elements 32 and 46 are each connected in pairs via chains, as shown in Figures 1 and 2 by the outer chains 38 and 52 and the inner chains 40 and 54.
- Fig. 3 are exemplified two outer chains with the reference numerals 38 and 52 and two inner chains with the reference numerals 40 and 54 are provided.
- FIG. 4 shows a second embodiment 100 of the device 10 according to the invention according to FIGS. 1 to 3. Similar components of Fig. 4 as those of Figs. 1 to 3 are shown with like reference numerals, but increased by the number 100. With respect to the second
- Embodiment 100 is explicitly referred to the embodiment of the inventive device 10 according to FIGS. 1 to 3.
- thirty-two tension members 132 are evenly distributed over a gland 126.
- a single continuous chain 160 is disposed on the tension members 132 such that it alternately wraps around one radially inner portion and one radially outer portion of a tension member 132 with respect to the gland 126.
- the chain 160 could also be laid in a circular shape over all the radially outer portions of the clamping members 132 with respect to the gland 126, but the degree of wrap is, and thus, the degree of wrap
- Fig. 5 is a further embodiment 200 of the device 10 according to the invention according to Figures 1 to 3 and the inventive
- FIG. 5 Similar components of Fig. 5 as those of Figures 1 to 4 are given the same reference numerals illustrated, but increasingly by the number 200 or increased by the number 100 with reference to FIG. 4. With respect to the embodiment 200 is explicitly on the embodiment of the device 10 according to the invention according to Figures 1 to 3 and the embodiment of the device 100 according to FIG. 4 referenced.
- twenty-four clamping members 232 are disposed on a gland 226.
- the clamping elements 232 include gears here as well.
- the radially outer sections of the clamping elements 232 with respect to the gland 226 are in engagement with a toothed rim 262, which is designed as an internally toothed ring.
- One of the clamping elements 232 in FIG. 5 is provided with an interface 250, in the sense of the nut 46 from FIG. 2.
- a rotation of one of the clamping elements 232 is about the
- Gear ring 262 transferred to all other clamping elements 232 so that they always rotate synchronously.
- Fig. 6 the embodiment 200 shown in FIG. 5 cut according to section line Vl-Vl. It can be seen that the toothed wheel of the clamping element 232 is connected to the toothed rim 262.
- the ring gear 262 has two radially inwardly projecting collars 264 and 266 which engage around the gears of the clamping elements 232.
- the collar 264 of the ring gear 262 is disposed on a side facing the gland 226 side of the gear and the collar 266 on an opposite side and facing away from the gland 226 side of the gear.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017221088.5A DE102017221088A1 (en) | 2017-11-24 | 2017-11-24 | Device for tensioning a stuffing box packing |
PCT/EP2018/077394 WO2019101414A1 (en) | 2017-11-24 | 2018-10-09 | Device for clamping a stuffing box packing |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3714187A1 true EP3714187A1 (en) | 2020-09-30 |
Family
ID=63862107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18786699.1A Withdrawn EP3714187A1 (en) | 2017-11-24 | 2018-10-09 | Device for clamping a stuffing box packing |
Country Status (5)
Country | Link |
---|---|
US (1) | US20200309264A1 (en) |
EP (1) | EP3714187A1 (en) |
CN (1) | CN111373179A (en) |
DE (1) | DE102017221088A1 (en) |
WO (1) | WO2019101414A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018218907A1 (en) | 2018-11-06 | 2020-05-07 | Bhs-Sonthofen Gmbh | Rotary pressure filter module |
WO2023061560A1 (en) | 2021-10-12 | 2023-04-20 | Bhs-Sonthofen Gmbh | Device for clamping a stuffing box packing |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US463053A (en) * | 1891-11-10 | Metallic rod-packing | ||
US816445A (en) * | 1905-06-14 | 1906-03-27 | Frederick W Felsberg | Stuffing-box. |
US911807A (en) * | 1908-06-27 | 1909-02-09 | Samuel E Condon | Stuffing-box. |
GB191308488A (en) * | 1913-04-10 | 1914-04-14 | Arthur Payne | Improvements in Glands for Stuffing Boxes. |
US1603364A (en) * | 1921-02-16 | 1926-10-19 | Tamini Mario | Means for tightening the glands of stuffing boxes |
US1649472A (en) * | 1926-05-03 | 1927-11-15 | Byron Jackson Pump Mfg Co | Packing-gland mechanism |
US2163813A (en) * | 1936-08-24 | 1939-06-27 | Hydril Co | Oil well packing head |
US2518980A (en) * | 1948-04-06 | 1950-08-15 | James H Early | Emergency packing |
US4516752A (en) * | 1984-01-12 | 1985-05-14 | Joy Manufacturing Company | Mechanically preloaded packing assembly |
DE4318157A1 (en) * | 1993-06-01 | 1994-12-08 | Amtec Advanced Measurement Mes | Method and device for the controlled tightening of stuffing box or seal packings |
DE102007002931A1 (en) * | 2007-01-19 | 2008-07-24 | Bhs-Sonthofen Gmbh | Sealing arrangement and sealing device, in particular as an accessory and / or spare part for such a seal arrangement |
DE102010044783A1 (en) * | 2010-03-02 | 2011-09-08 | Grob-Werke Gmbh & Co. Kg | processing machine |
CN104265992A (en) * | 2014-09-29 | 2015-01-07 | 重庆川武仪表有限公司 | Sealing structure of gate valve stuffing box |
CN105626956B (en) * | 2016-02-22 | 2018-11-02 | 吴忠仪表有限责任公司 | Waveform packing seal structure |
CN206530768U (en) * | 2017-03-07 | 2017-09-29 | 章飞 | A kind of vacuum valve packing box seal structure |
-
2017
- 2017-11-24 DE DE102017221088.5A patent/DE102017221088A1/en not_active Withdrawn
-
2018
- 2018-10-09 US US16/765,567 patent/US20200309264A1/en not_active Abandoned
- 2018-10-09 WO PCT/EP2018/077394 patent/WO2019101414A1/en unknown
- 2018-10-09 EP EP18786699.1A patent/EP3714187A1/en not_active Withdrawn
- 2018-10-09 CN CN201880071111.8A patent/CN111373179A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN111373179A (en) | 2020-07-03 |
DE102017221088A1 (en) | 2019-05-29 |
US20200309264A1 (en) | 2020-10-01 |
WO2019101414A1 (en) | 2019-05-31 |
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