EP3718607A1 - Dispositif de décharge de pression sans flamme ou à réduction de flamme - Google Patents

Dispositif de décharge de pression sans flamme ou à réduction de flamme Download PDF

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Publication number
EP3718607A1
EP3718607A1 EP19167426.6A EP19167426A EP3718607A1 EP 3718607 A1 EP3718607 A1 EP 3718607A1 EP 19167426 A EP19167426 A EP 19167426A EP 3718607 A1 EP3718607 A1 EP 3718607A1
Authority
EP
European Patent Office
Prior art keywords
frame
support frame
pressure relief
inlet opening
flameless
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Withdrawn
Application number
EP19167426.6A
Other languages
German (de)
English (en)
Inventor
Stefan Penno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rembe GmbH Safety and Control
Original Assignee
Rembe GmbH Safety and Control
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rembe GmbH Safety and Control filed Critical Rembe GmbH Safety and Control
Priority to EP19167426.6A priority Critical patent/EP3718607A1/fr
Publication of EP3718607A1 publication Critical patent/EP3718607A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave

Definitions

  • a device for flameless pressure relief is from the document EP 3 415 202 A1 known. It can be used to absorb pressure waves and flames from explosions that arise in an enclosure via the inlet opening and to dissipate them through the large number of outlet openings of the textile structure (s) of the shell, the gas-dust mixture passing through the shell, in particular air - Dust mixture, cooled to the extent that the flames go out or are significantly reduced.
  • the sheath is carried by a wire frame.
  • the support frame and the frame span a ball-like, trough-like, spherical and / or oval space in cross section. The support frame prevents the shell from collapsing and falling into this space.
  • the support frame is made of wire rods, so that as few outlet openings as possible are covered.
  • the device has the advantage over other devices for flameless pressure relief that it has a sheath made of knitted wire which completely covers the outside of the support frame.
  • the edge or the edges of the envelope are connected directly or indirectly to the edge of the frame. It is not necessary that the shell is furthermore held by a frame or other means.
  • the connection of the edge or the edges to the frame is designed in such a way that the pressure of the pressure wave entering the device does not lead to the casing tearing and / or the casing being wholly or partially flying away.
  • the device from the document EP 3 415 202 A1 has proven itself in practice. There have also been attempts to use the device on oscillating system parts or machines, for example on vibrating screens, in particular on vibrating screen housings, where they are exposed to high dynamic loads. Alternatively, the housings of vibrating screens are secured with bursting discs. Flameless or flame-reducing pressure relief of the housings is not possible with rupture discs alone.
  • devices for flameless pressure relief are currently often used, which are arranged on a framework that is rounded separately from the vibrating screen, so that they are as far as possible decoupled from the vibration of the vibrating screen. Flameless pressure relief can then take place via hose connections between an inlet opening of the devices for pressure relief and an outlet opening in a housing of the vibrating screen device.
  • hose connections have high dynamic loads due to vibrations, for example 3.3 Hz at amplitudes in the plane of the frame of, for example, 40 mm in a first direction and, for example, 45 mm in a second direction, have not grown permanently and wear out quickly.
  • the invention is based on the object of creating a device for flameless or flame-reducing pressure relief which can cope with the dynamic loads of permanent vibrations and is easy to manufacture. It should be as light as possible.
  • the support frame has ribs, longitudinal beams and struts. This enables a construction that is lightweight and can cope with the dynamic loads caused by permanent vibrations.
  • the frames can have a rectangular cross section, the height of which is many times greater than the thickness.
  • the ribs can absorb particularly high transverse forces and, in particular, bending moments due to the weight of the shell, without being severely deformed.
  • the ribs can preferably consist of a sheet metal, in particular a thin sheet or heavy sheet (for example in the sense of EN 10079), for example up to 8 mm thick.
  • the frames can for example be produced from a heavy plate by dividing, in particular shear cutting, or by ablation, in particular laser ablation.
  • the frames can be curved, in particular in the shape of a circular ring.
  • the arch shape of the frames is also advantageous for stability and, in particular, for absorbing and dissipating transverse forces.
  • the longitudinal beams can be wholly or at least partially rod-shaped, with a circular cross-section, or tubular.
  • Preferably the side rails are straight. They serve to absorb longitudinal forces.
  • the struts can be wholly or at least partially rod-shaped or tubular.
  • the struts serve to absorb longitudinal forces in particular from the side members and to dissipate them into the frame.
  • the struts are preferably connected at a first end to one of the longitudinal beams and at a second end to another of the longitudinal beams or to the frame.
  • the struts are preferably arranged crossed in pairs. The struts crossed in pairs can be connected to one another, but they can also be guided past one another. This can be made easier if the struts have a bulge.
  • the support frame and the frame can span a ball-like, trough-like, spherical and / or oval space in cross section.
  • the support frame prevents the shell from collapsing and falling into this space.
  • a device can have clamping strips which are attached to the frame.
  • the edge of the cover or the edges of the cover can be clamped in the clamping strips.
  • the terminal strips preferably have teeth.
  • the casing lying on the support frame is held by means of the clamping strips so that it does not become detached from the support frame even if a pressure wave enters the device via the inlet opening.
  • the toothing on the clamping strips can improve the fastening of the wheel or the edges of the cover.
  • the support frame and the frame of a device according to the invention can span a space that is a cylinder segment or is similar to a cylinder segment.
  • the textile fabric or structures from which the cover is made are preferably made from metal and / or PA threads, in particular aramid threads. It can be a structure made from a fully fashioned-knitted fabric.
  • the support frame of a device according to the invention can be covered with the cover by a method in which the support frame and the frame are wrapped as completely as possible with at least one sheet of the textile fabric made of metal threads or PA threads, in particular aramid threads.
  • a machine can be used for wrapping. The machine can wind the web or webs in the longitudinal direction around the frame and the support frame, the assembly of the frame and the support frame being rotated about its longitudinal axis during the winding so that each section of the web resting on a jacket surface of the assembly offset from the previously wound section of the web or another web.
  • the covering of the support frame with the cover can be done by hand or with a machine in such a way that cut-to-length webs from the textile fabric made of metal threads or PA threads, in particular aramid threads, overlap in a first layer or lie seamlessly next to one another in a first Direction are placed on the support frame.
  • a second layer lengths that have been cut to length are placed on the first layer in a second direction, overlapping or lying seamlessly against one another.
  • the webs can then be placed alternately in the first direction and the second direction on the previously placed layer.
  • the first direction can be perpendicular to the second direction.
  • Layers can also be provided in which the webs are laid in further directions.
  • the webs made of the textile fabric are preferably stretchable, so that by stretching the web, the web snuggles against the edge between the jacket surface and an end face of the arrangement made up of the support frame and the frame.
  • the inlet opening can be cut free.
  • the edge resulting from the cutting free of the inlet opening or the edges of the casing resulting from the cutting free of the inlet opening can then be connected directly or indirectly to the frame, so that the edge or the edges are then fixed.
  • a device according to the invention for flameless or flame-reducing pressure relief can be part of an oscillating machine, in particular an arrangement of a sieve device with a vibrating sieve, in particular for sieving inorganic and / or organic material, such as wood residues, wood chips, wood dust or others, and a device for flameless or flame-reducing pressure relief.
  • the machine can have a housing with an outlet opening on which the device for pressure relief is arranged with its inlet opening adjoining the outlet opening.
  • the frame 1 of the Figure 1 The arrangement shown includes a rectangular inlet opening E, through which dust, gases, flames or other can enter the device according to the invention.
  • the frame 1 has a rectangular flange 11, with which the frame 1 can be connected to another component, for example to a container, an enclosure or other.
  • the component then has an outlet opening at the point of the connection, through which the dust, gases, flames or other can exit the component or pass through the component.
  • This outlet opening can be closed by a flap, a film, a sheet metal or a rupture disk so that something does not escape through the outlet opening and enter the device according to the invention without cause.
  • a section 12 of the frame 1 that is almost perpendicular to the flange 11 adjoins the flange 11. At its end facing away from the flange, the support frame 2 and the terminal strips 4 are connected.
  • the support frame 2 has frames 21, longitudinal members 22 and struts 23.
  • the frames 21 are made from heavy plate approximately 3 to 8 mm thick. Each of the frames 21 has an arcuate section 211 of a ring. The arcuate section has a width which is a multiple of the thickness of the ribs or the heavy plate. With the ends of the arched sections 211 middle frames 21 are connected to the frame 1, namely to the long-sided sections 12 of the frame 1. The ends of the arched sections 211 of the two end-face, outer frames 21 are connected to one another via a strip 212 of the frames 21 . This strip 212 is also connected to the frame 1, specifically to the narrow-sided sections 12 of the frame 1.
  • Two adjacent frames 21 are connected to one another by at least three longitudinal beams 22.
  • the longitudinal beams 22 between two frames 21 run parallel to one another and parallel to the long sides of the frame 1.
  • a longitudinal beam 22 between two adjacent frames 21 is arranged in alignment with other longitudinal beams between other pairs of frames.
  • Frames 21 and longitudinal beams 22 are connected to one another in a suitable manner, for example by welding or screw connections.
  • the support frame has struts 23 between the two middle frames 21.
  • the struts are arranged either between two adjacent longitudinal beams or between the long-sided sections 12 of the frame and the adjacent longitudinal beam 22. In each case two struts 23 cross one another. They have bulges so that they can be guided past one another.
  • the terminal strips 4 are connected to the sections 12 of the frame 1, both on the narrow sides and on the long sides of the frame 1. Each terminal strip has a toothing, the teeth of which are used to penetrate into the sleeve attached to the terminal strips. Two terminal strips 4 each form a pair.
  • the terminal strips 4 of a pair of terminal strips are connected to one another by screws 42. By means of the screws 42, the strips can be pulled towards one another in order to clamp and thus hold the edge or the edges which are arranged between the clamping strips 4 of a pair of clamping strips.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
EP19167426.6A 2019-04-04 2019-04-04 Dispositif de décharge de pression sans flamme ou à réduction de flamme Withdrawn EP3718607A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19167426.6A EP3718607A1 (fr) 2019-04-04 2019-04-04 Dispositif de décharge de pression sans flamme ou à réduction de flamme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19167426.6A EP3718607A1 (fr) 2019-04-04 2019-04-04 Dispositif de décharge de pression sans flamme ou à réduction de flamme

Publications (1)

Publication Number Publication Date
EP3718607A1 true EP3718607A1 (fr) 2020-10-07

Family

ID=66101851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19167426.6A Withdrawn EP3718607A1 (fr) 2019-04-04 2019-04-04 Dispositif de décharge de pression sans flamme ou à réduction de flamme

Country Status (1)

Country Link
EP (1) EP3718607A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3415202A1 (fr) 2017-06-13 2018-12-19 Rembe GmbH Safety + Control Dispositif de décharge de pression sans flamme

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3415202A1 (fr) 2017-06-13 2018-12-19 Rembe GmbH Safety + Control Dispositif de décharge de pression sans flamme

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