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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
  • F16K1/32—Details
  • F16K1/34—Cutting-off parts, e.g. valve members, seats
  • F16K1/46—Attachment of sealing rings
  • F16K1/465—Attachment of sealing rings to the valve seats
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
  • F01M13/00—Crankcase ventilating or breathing
  • F01M13/0011—Breather valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B77/00—Component parts, details or accessories, not otherwise provided for
  • F02B77/08—Safety, indicating, or supervising devices
  • F02B77/10—Safety means relating to crankcase explosions
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
  • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
  • F15B13/024—Pressure relief valves
• • 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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
  • F16K1/32—Details
  • F16K1/34—Cutting-off parts, e.g. valve members, seats
  • F16K1/42—Valve seats
• • 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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
  • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
  • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
  • F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
• • 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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
  • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
  • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
  • F16K17/0466—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with a special seating surface
• • 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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K27/00—Construction of housing; Use of materials therefor
  • F16K27/02—Construction of housing; Use of materials therefor of lift valves

Definitions

• the invention relates to a relief valve in the form of an explosion protection valve for arrangement on a wall opening of a wall of a work space to relieve the work space when a predetermined opening pressure is exceeded when an inflammable medium in the work space is exploded, with a valve seat element with a valve seat opening, with a valve plate, which in the closed state of the Explosion protection valve closes the valve seat opening and one, on the valve seat element between the
• Valve seat element and the valve plate arranged one-piece sealing element which is in contact with the valve plate in the closed state of the explosion protection valve, wherein the valve plate can be lifted from the sealing element when the predetermined opening pressure is exceeded to release the valve seat opening.
• Relief valves are used, for example, as explosion protection valves for pressure relief in closed work spaces in the event of an explosion.
• workrooms can e.g. Be crankcase of internal combustion engines, which must be relieved in the event of an explosion from the sudden increase in pressure as a result of the explosion in the crankcase in order to avoid damage in particular.
• relief valves there are also other closed work rooms that have to be protected by relief valves in the event of an explosion. Explosions are particularly at risk e.g. closed work rooms, in which powdery combustible media are handled, since a dust explosion can occur relatively easily here. Mixtures of dust and air are explosive if the dust consists of combustible material such as B. coal, flour, wood, cocoa, coffee, starch or cellulose.
• Inorganic substances and elements such as magnesium, aluminum and even iron and steel are also explosive (or at least flammable) in this form.
• the small particle size of the dusts is crucial.
• the explosive effects increase with decreasing particle size, since this increases the surface of the dust particles.
• ignition sources include hot surfaces (e.g. in production environments), grinding or friction sparks and bearing damage.
• Explosion relief valves are generally known in the prior art.
• KR100981453 B1, WO 09136674 A1, DD87441 A Explosion protection valves in various configurations, an annular groove and a seal in the form of an O-ring being provided on the valve seat for sealing between the valve plate and the valve seat.
• a disadvantage of such an embodiment is, on the one hand, the relatively high manufacturing outlay for the valve seat, since in particular the groove for the O-ring has to be manufactured very precisely in order to ensure a good seal.
• Another disadvantage is that due to the contact of the valve seat with the work area, especially with aggressive media in the work area, high-quality, corrosion-resistant materials have to be used for the valve seat, which is cost-intensive.
• the CN 206233978 U shows an explosion protection valve with a flat seal between the valve seat and valve plate and with a connecting pipe including a mounting flange for mounting.
• JP S61206171 U and JP S 50100133 U show examples of
• valves that are integrated in devices, for example in marine engines or serving devices as shown in US Pat. No. 6,834,624 B1, US Pat. No. 4,674,449 A or GB 473,901 A.
• explosion protection valve It is therefore an object of the invention to provide an explosion protection valve which overcomes these disadvantages.
• the explosion protection valve should be simple and inexpensive to manufacture and deposits on the valve seat should be reduced, in particular avoided.
• the object is achieved in that a first end face forming a first sealing surface and an opposite second end face forming a second sealing surface are provided on the sealing element, the valve plate sealingly abutting the first end face and the second end face at least in the closed state of the explosion protection valve is partially free to in the assembled state of the
• Explosion protection valve to seal directly against the wall or against a mounting flange arranged on the wall, so that an internal, continuous seal inner circumferential surface is provided on the sealing element, which is the first Connects end face and the second end face and that the sealing element with an outer seal outer peripheral surface opposite the seal inner circumferential surface that connects the first end face and the second end face on
• Valve seat element is arranged, and that the seal inner peripheral surface
• Valve seat opening limited peripherally.
• a less expensive material can be used to manufacture the valve seat element.
• less stringent requirements are placed on the manufacturing accuracy of the valve seat element, in particular on the flatness, as a result of which the valve seat can be manufactured more cost-effectively.
• the valve seat element can also be structurally simpler, which enables weight savings.
• the sealing element can also serve to seal against a fastening flange or against the wall, which means that a separate seal can be dispensed with.
• the explosion protection valve has a fastening means for fastening the explosion protection valve to the wall of the work space, whereby as
• Fastening means is preferably provided a plurality of fastening screws with which the explosion protection valve can be screwed to the wall of the work space.
• the advantage of screws is that they are inexpensive standard products and that they can be easily opened and screwed back on.
• a flame absorber is preferably provided in the explosion protection valve to prevent the flame from spreading from the working space through the explosion protection valve, the flame absorber preferably being in the form of a plate pack consisting of a plurality of sheet metal plates arranged one above the other. This can reliably prevent flames from escaping in the event of an explosion in the work area, which increases safety for people and reduces the risk of fire.
• the explosion protection valve preferably has a suspension unit, which is provided to pretension the valve plate against the sealing element in the closed state of the explosion protection valve, with the
• Suspension unit is preferably designed as a coil spring with preferably a linear, progressive or degressive spring characteristic. This enables a simple and inexpensive standard machine element to be used.
• a circular valve seat opening and a corresponding circular valve plate are preferably provided, the sealing element as one
• rotationally symmetrical sealing ring is designed. This creates an essentially cylindrical explosion protection valve that is simple and inexpensive to manufacture. Through the circular shape of the openings, the valve plate and in particular the sealing ring, a good sealing effect is achieved and deposits are reduced
• first end face and the inner circumferential surface of the seal form a first main sealing lip, which is in contact with the valve plate when the explosion protection valve is closed. It is also advantageous if the first end face and the sealing outer circumferential surface form a second main sealing lip, which in the
• the closed state of the explosion protection valve is in contact with the valve plate. This can improve the sealing effect.
• Sealing element at least one secondary sealing lip may be provided, which lies between the first and second main sealing lip and / or that at least one secondary sealing lip is provided on the second end face of the sealing element, which lies between the outer sealing surface and the inner sealing surface.
• a valve seat element projection which extends inward in the direction of the valve seat opening is preferably provided on the valve seat element, and a seal element cutout for arranging the
• valve seat element a first disc-shaped valve seat component with a first central valve seat component recess and a second disc-shaped adjoining it in the closing direction of movement of the valve plate
• Valve seat element projection is smaller relative to the second valve seat component recess.
• FIGS. 1 a to 4 b show exemplary, schematic and non-limiting advantageous embodiments of the invention. It shows
• valve seat 1b shows a detailed view of the valve seat
• Explosion protection valve 3 the explosion protection valve according to the invention in the open state
• FIG. 4a shows a sealing element of the explosion protection valve according to the invention in a first embodiment
• FIG. 4b shows a sealing element of the explosion protection valve according to the invention in a further embodiment.
• the explosion protection valve 1 shows a cylindrical explosion protection valve 1 known in the prior art in a sectional view.
• the explosion protection valve 1 is arranged on a wall opening 4 of a wall 3 of a closed work space AR that the
• Explosion protection valve 1 in the closed state of the explosion protection valve 1 seals the working area AR from an environment AT of the closed working area AR.
• the explosion protection valve 1 has a valve axis VA, an outer one
• Valve housing 2 and the valve seat element 5 are arranged spacer elements 7 which e.g. can be designed as (not shown) spacer sleeves around the clamping screws 6a or in one piece with the clamping screws 6a, as can be seen in FIG.
• the spacer elements 7 are used to connect the valve housing 2 and the valve seat element 5 at a certain distance in the axial direction of the explosion protection valve 1 from one another in a substantially rigid manner.
• Corresponding threaded bores 8 are provided in the valve seat element 5 for screwing in the clamping screws 6a and there are for screwing the clamping screws 6a to the valve housing 2
• Screw nuts 9 are provided, which are screwed onto threaded sections of the clamping screws 6 a, which protrude beyond the valve housing 2.
• a flame absorber 10 is arranged, which is designed here in the form of laminated laminations.
• the flame absorber 10 serves to prevent any flames from penetrating into the environment AT through the explosion protection valve 1 when the explosion protection valve 1 is open.
• Explosion protection valve 1 is with fasteners 11, here in the form of
• a spacing element 7 can be arranged around the fastening means 11 between the valve housing 2 and the valve seat element 5, which in the example shown is designed as a spacing sleeve 7a.
• a suspension unit 13 is arranged, which rests with an axial end on the valve housing 2 and whose opposite axial end rests on a valve plate 15. The suspension unit 13 prestresses the valve plate 15 in the closed state of the explosion protection valve 1 with a defined pretensioning force against the valve seat element 5 in order to close the wall opening 4 of the wall 3 and thus the working space AR.
• a sealing element 16 in the form of an O-ring is arranged between the valve plate 15 and the valve seat element 5, which seals the valve plate 15 against the valve seat element 5 (in the closed state of the
• Explosion protection valve 1 seals.
• FIG. 1b shows a detailed view of the area of the seal between valve plate 15 and valve seat element 5 marked in FIG. 1a.
• the sealing element 16, which is embodied here as an O-ring, is seated in a sealing groove 17 which runs essentially in a ring on the valve seat element 5.
• the sealing groove 17 has a complex geometry, must be very precise, i.e. are manufactured with small dimensional tolerances and must also be very smooth, i.e. have a low roughness and be flat. Naturally, this requires a high manufacturing effort, since that
• Valve seat element 5 has to be mechanically processed, e.g. the surface of the valve seat element 5 facing the valve plate 15 must first be machined, e.g. by milling or turning and then the sealing groove 17 can be produced, which can be done, for example, by turning, provided that the sealing groove, as here, is a rotationally symmetrical sealing groove.
• valve plate which is generally carried out by deep drawing, is relatively complex in the conventional design of the explosion protection valve in order to achieve sufficient tightness. In particular, are very high
• valve seat element 5 on the radially inner side is essentially in direct contact with the working space AR and the working medium handled therein.
• an explosion protection valve 1 is therefore designed with a specially shaped sealing element 16, as shown in FIGS. 2a, 2b and 3.
• Sealing element 16 is provided with a first end face DA1 forming a first sealing surface DF1 and an opposite second end face DA2 forming a second sealing surface DF2, wherein in the closed state of the explosion protection valve 1 the valve plate 15 seals against the first end face DA1 or the formed sealing surface DF1 , is present and the second end face DA2 is at least partially free. That means that
• Explosion protection valve 1 can be arranged adjacent to a component, for example a wall 3 of a work space AR, when used with the free end face DA2.
• the sealing element 16 also has an internal, continuous sealing inner circumferential surface 23 which connects the first end face DA1 and the second end face DA2.
• the seal element 16 is arranged on the valve seat element 5 with a seal outer circumferential surface 28 opposite the inner circumferential surface 23 of the seal, which connects the first end face DA1 and the second end face DA2.
• the sealing element 16 also serves for sealing against the valve plate 15 and also for direct sealing against one
• FIG. 2a shows an explosion protection valve 1 according to the invention with a valve axis VA in a sectional view, which is arranged at a wall opening 4 of a wall 3 of a working space AR.
• the structure of the explosion protection valve 1 corresponds in principle to the explosion protection valve 1 shown in FIG. 1a.
• the explosion protection valve 1 has a valve housing 2 which is fastened to the wall 3 by means of a fastening means 1 1, here fastening screws 1 1 a (not in the sectional plane ), which are screwed into (not shown) threaded bores 12 of the wall 3.
• the explosion protection valve 1 has clamping elements 6 distributed over the circumference, clamping screws 6a in the example shown, in order to hold the explosion protection valve 1 axially together. At the outer ends of the clamping elements 6 facing away from the valve housing 2, too
• Carrying elements 19 are provided, which are designed here in the form of screw eyes, which are screwed, for example, onto threaded sections of the clamping screws 6a.
• the explosion protection valve 1 can be handled more easily by means of the carrying elements 19 or screw eyelets, for example by being attached to a crane hook, which is particularly advantageous in the case of a heavy version of the explosion protection valve 1, since it facilitates assembly.
• the explosion protection valve 1 also has a suspension unit 13, which is designed here as a conical helical spring 14, preferably with a non-linear spring characteristic.
• a non-linear spring characteristic means that a spring stiffness c of the coil spring 14 changes depending on the path I by which the coil spring 14 is compressed, the path I in the specific case corresponding to the so-called valve stroke H x of the explosion protection valve 1.
• the valve stroke H x is thus the distance between the closed position and the open position of the valve plate 15.
• the nonlinear spring characteristic can be progressive or degressive, the
• Spring constant c increased with a progressive spring characteristic over the path I and decreased with a degressive spring characteristic over the path I. This can mean, for example, that a certain first opening force Fo1 is required to lift the valve plate 15 to the first 10% of the valve stroke H x and a certain second opening force Fo2 is required to further lift the valve plate 15 to the second 20% of the valve stroke H, which is greater (progressive) or less (degressive) than the first opening force Fo1. So that can by the design of the coil spring 14
• Opening characteristics of explosion protection valve 1 can be set.
• a helical spring 14 with a linear spring characteristic could also be used, the spring constant c remaining constant over the path I.
• suspension units 13 e.g. Ring springs, Evolut springs, diaphragm springs, disc springs, etc.
• a known air spring could be used, which would have the advantage that the spring stiffness c and thus the opening characteristic of the
• Explosion protection valve 1 could be changed via the air pressure of the air spring.
• the explosion protection valve 1 could be adapted very flexibly to various applications with variable opening pressure, the opening pressure corresponding to the pressure in the working space AR at which the valve plate 15 starts to lift off from the valve seat element 5.
• valve plate 15 lies sealingly on the sealing element 16 and is relative to in the direction of the valve axis VA
• Sealing element 16 is movably arranged.
• the valve plate 15 closes the
• the Explosion protection valve 1 has, according to the invention, a special sealing element 16 and a valve seat element 5 which cooperates therewith.
• the sealing element 16 has a first sealing surface DF1 on the first end face DA1, which, when the explosion protection valve 1 is closed, bears sealingly against a valve plate inner surface 15a of the valve plate 15.
• the second end face DA2 of the sealing element 16 opposite in the direction of the valve axis VA has a second, exposed sealing surface DF2.
• the end face DA1 and the second end face DA2 are connected on the inside (facing the valve seat opening VO) by a continuous seal inner circumferential surface 23, the seal inner circumferential surface 23 simultaneously forming the peripheral boundary of the valve seat opening VO, and on the opposite side by a seal Outer peripheral surface 28 connected.
• the sealing element 16 and in particular the inner circumferential surface 23 of the seal as a continuous surface that forms the peripheral boundary of the valve seat opening VO, any joints in the area of the valve seat opening VO can be minimized as far as possible, whereby the risk of deposits on the explosion protection valve 1 can be reduced, preferably avoided .
• the continuous seal inner circumferential surface 23 serves in particular for the fact that
• Explosion protection valve 1 is advantageous in hygienic applications, in order to avoid that the undesired constituents remain on the sealing element 16.
• this embodiment of the sealing element 16 ensures that the valve seat element 5 is separated from the valve seat opening VO by the sealing element 16.
• the valve seat element 5 no longer comes into contact with a working medium in the working space AR, which means that the valve seat element 5 can be made simpler with regard to the materials used.
• the explosion protection valve 1 can be easily and securely arranged on a component via the exposed second end face DA2. It can be advantageous if the second end face DA2 in the direction of the valve axis VA from the axial end of the
• Explosion protection valve 1 for example formed by the valve seat element 5, protrudes so that the sealing element 16 can be axially compressed when arranged on the component with the fastening means 11, which improves the seal on the second sealing surface DF2.
• the explosion protection valve 1 can, for example, directly on a wall 3 of a
• Work room AR are attached. But it can also be provided a mounting flange 20 which is attached to the wall 3 and on which
• Explosion protection valve 1 is attached.
• the explosion protection valve 1 can also first be connected to the fastening flange 20 and then jointly on the wall 3.
• the clamping screws 6a are screwed into a fastening flange 20, of course in the valve seat element 5
• Corresponding recesses axially penetrating the valve seat element 5 are provided, preferably through-bores through which the clamping screws 6a protrude in order to be able to be screwed tightly to the fastening flange 20 (or also to the wall 3).
• the mounting flange 20 is only optional and offers the advantage, among other things, that a precisely defined sealing surface 21 serves as a support for the
• Sealing element 16 can be provided, which improves the sealing properties of the explosion protection valve 1.
• the arrangement of a fastening flange 20 is particularly advantageous in the case of dirty or uneven surfaces of the wall 3.
• the recess in the mounting flange 20 can be more easily adapted exactly to the valve seat opening VO, so that as far as possible no joints or gaps form between the mounting flange 20 and the sealing element 16.
• the explosion protection valve 1 is essentially cylindrical with a round, preferably circular valve seat opening VO, the wall opening 4 of the wall 3 naturally also preferably having a round cross section. Accordingly, the valve plate 15, the valve seat element 5 and the fastening flange 20 are also essentially in the example shown
• the sealing element 16 is consequently likewise designed as a rotationally symmetrical sealing ring.
• the holes for the clamping screws 6a and fastening screws 1 1a can of course be excluded from the rotational symmetry.
• the bores are arranged on a so-called bolt circle with a specific bolt circle diameter and are preferably spaced apart from one another on the bolt circle at constant angular intervals.
• the sealing element 16 is preferably designed such that the sealing
• Fastening flange 20 which can be conical or cylindrical, forms a continuous smooth, preferably joint-free peripheral boundary surface of the valve seat opening VO.
• the valve seat element 5 can be made in one part or, as in the exemplary embodiment shown, in two parts. Due to the two-part design of the valve seat element 5, the valve seat element 5 can be produced very easily and inexpensively, since the two Valve seat components 5a, 5b are essentially structurally simple disc-shaped components. The valve seat components 5a, 5b can thereby be produced in a simple manner, for example by means of laser cutting from a plate of a suitable material, by continuous casting and subsequent sawing, etc. Of course, the valve seat element 5 could also be made in one piece, for example as a turned part.
• valve seat element 5 has two valve seat components 5a, 5b adjoining one another in the direction of the valve axis VA of the explosion protection valve 1.
• the first valve seat component 5a lies closer to the valve plate 15 in the axial direction than the second valve seat component 5b, as can be seen in FIG. 2b.
• Valve seat component 5a has a first central valve seat component recess and the second valve seat component 5b has a second central one
• valve seat component recess The first valve seat component recess is smaller than the second valve seat component recess, so in the case of the
• the two valve seat components 5a, 5b are thus essentially disc-shaped with the same outer diameter but different thickness and different inner diameters, which are arranged one above the other. This configuration forms a radially inwardly extending, for example essentially annular,
• Valve element projection 24 from.
• a valve element projection 24 projecting in the direction of the valve seat opening VO from the valve seat element 5 can also be designed in any other way, in particular also on a one-piece part
• Valve seat element 5 The valve element projection 24 is preferably made closed over the circumference of the valve seat opening VO.
• the sealing element 16 is advantageously arranged with its sealing outer peripheral surface 28 on the valve element projection 24.
• the sealing element 16 has a corresponding sealing element recess 25 on the sealing outer circumferential surface 28, with which the sealing element 16 can be arranged on the valve element projection 24.
• Another advantage of the explosion protection valve 1 according to the invention is the complete shielding of the valve seat element 5 from the working medium of the explosion protection valve 1.
• the valve seat element 5, or the two valve seat components 5a, 5b of the valve seat element 5 can be produced from any suitable material and a machinable material does not necessarily have to be used, as is known in the prior art for mechanical processing of the sealing groove 17 for the O. -Ring is required.
• the shielding of the valve seat element 5 from the working medium offers a clear advantage compared to conventional valves.
• Valve seat element 5 with the aggressive, corrosive atmosphere in the working space AR, it is not necessary, as previously, that a corrosion-resistant material is used to manufacture the valve seat element 5, but simple steel such as e.g. Mild steel (S 235 JR) can be used, which leads to significant cost savings, especially for large versions of the explosion protection valve 1.
• a corrosion-resistant material such as e.g. Mild steel (S 235 JR) can be used, which leads to significant cost savings, especially for large versions of the explosion protection valve 1.
• S 235 JR Mild steel
• Other suitable materials would also be conceivable, such as Plastics or non-ferrous metals.
• a flame absorber 10 is preferably also on
• Explosion protection valve 1 is provided, which is used in the event that
• Fig.4a and Fig.4b are two exemplary embodiments of the
• Sealing element 16 shown in cross section.
• the specific structural design of the sealing element 16 is of course left to the person skilled in the art and can vary depending on the application of the explosion protection valve 1, e.g. depending on the temperature in the working area AR, depending on the working medium or depending on the pressure in the working area AR, etc.
• the sealing element 16 could have one or more circumferential sealing lips on the first end face DA1 facing the valve plate 15 and / or on the second end face DA2 facing away from the valve plate 15 (see FIGS. 4a + 4b).
• Fig. 4a a first advantageous embodiment of the sealing element 16 is shown in cross section and in Fig.4b a second advantageous embodiment.
• the sealing element 16 can be essentially made of any suitable material, wherein
• preferably common elastic materials are used.
• plastics, synthetic rubber, natural rubber or mixtures thereof with other materials would be conceivable.
• Sealing materials are known in the prior art and the person skilled in the art can select a suitable material for a specific one
• the sealing element 16 in FIG. 4 a has a sealing element recess 25 on the sealing outer circumferential surface 28, the lower recess surface 25 a of which is essentially parallel to the second sealing surface DF2 of the second end face DA2.
• the Opposing upper recess surface 25b of the sealing element recess 25 is inclined at a certain pretension angle a to the first recess surface 25a, so that (in the non-installed state of the sealing element 16) there is a certain minimum distance a between the two recess surfaces 25a, 25b.
• This minimum distance a is preferably set such that it is less than the axial projection extension b of the valve seat element projection 24 (see FIG. 2b). Due to the preferably elastic material of the sealing element 16, a certain pretensioning force can be generated with which the second recess surface 25b (in the installed state of the
• Sealing element 16 is pressed onto the valve seat element projection 24. As a result, the sealing element 16 can be seated essentially without play
• Valve seat element projection 24 can be ensured, the upper recess surface 25b preferably being flat on the installed element of the sealing element 16
• Valve seat element projection 24 rests and is therefore parallel to the lower recess surface 25a.
• a first and a second main sealing lip 27a, 27b are provided on the first (upper) end face DA1 of the sealing element 16, the first main sealing lip 27a being formed by the seal inner circumferential surface 23 and the first sealing surface DF1 and the second main sealing lip 27b by the first sealing surface DF1 and the seal outer peripheral surface 28 is formed.
• the main sealing lips 27a, 27b each have a round end with a certain radius R.
• the main sealing lips 27a, 27b cooperate sealingly with the valve plate 15 in the installed state of the sealing element 16, as can be seen in FIG. 2b.
• the exact number i of main sealing lips 27i and the exact structural design depend on the application of the explosion protection valve 1, e.g.
• the first main sealing lip 27a which in the closed state of the explosion protection valve 1 (which is the normal case) lies against the valve plate inner surface 15a, could be long, narrow and designed with a small radius R in order to be as good as possible at the
• first sealing surface DF1 would be essentially analogous to the second sealing surface in FIG.
• first (or second) main sealing lip 27a can be provided on the sealing element 16.
• the inner circumferential surface 23 of the seal could already have a curvature, as shown in FIG Dashed line is symbolized to nestle even better against the valve plate inner surface 15a in the installed state.
• FIG Dashed line is symbolized to nestle even better against the valve plate inner surface 15a in the installed state.
• the first main sealing lip 27a is preferably elastically deformed in order to exert a certain pretensioning force on the valve plate 15, as a result of which the sealing effect is improved.
• the curvature of the inner circumferential sealing surface 23 in FIG. 2b shows that the entire
• Sealing element 16 is subject to a certain deformation in the closed state of the explosion protection valve 1. This deformation can in turn depend on many parameters and influencing factors, e.g. the spring force with which the valve plate 15 presses on the sealing element 16, the sealing material, the temperature in the working space AR, etc.
• the sealing element 16 has a substantially straight inner circumferential surface 23 with a sealing inclination ⁇ between the inner circumferential surface 23 and the second sealing surface DF2 of the second end face DA2.
• This sealing tendency ⁇ can also be variable over the length of the inner circumferential surface 23 of the seal, e.g. when the seal inner peripheral surface 23 is curved (dashed line in Fig.4a).
• two additional sealing lips 29 are additionally arranged between the two main sealing lips 27a, 27b, which, when the explosion protection valve 1 is closed, on the
• the embodiment according to FIG. 4b also has secondary sealing lips 29 on the (lower) second end face DA2 in order to improve the sealing effect on the fastening flange 20 (or on the wall 3).
• a projection 30 is provided between the second main sealing lip 27b and the sealing element recess 25, as a result of which the recess area 25b is enlarged and offers a better contact of the sealing element 16 on the valve seat element projection 24.
• the configuration of the sealing element 16 according to FIG. 4 a is preferably for
• Valve seat openings VO with diameters ⁇ 500mm are used and the configuration of the sealing element 16 according to FIG. 4b is preferably used for valve seat openings VO with diameters> 500mm.
• the illustrated variants of the sealing element 16 are of course only to be understood as examples. It can be seen that it is for the constructive design of the sealing element 16
• Sealing element 16 has a very large scope for the person skilled in the art and that, depending on the specific application of the explosion protection valve 1, there are also various configurations of sealing elements 16 in order to achieve the required sealing effect. Of course, it would also be possible to arrange only a first or second main sealing lip 27a, 27b, to arrange a plurality i of secondary sealing lips 29i, or to provide different preloads, curvatures and angles.
• explosion protection valve 1 Even if the explosion protection valve 1 according to the invention was described on the basis of the advantageous cylindrical design, it should be noted at this point that other designs are also possible.
• An explosion protection valve 1 could also be provided for a wall recess 4 deviating from the cylindrical shape, for example for a triangular, rectangular or oval wall recess 4.
• the structural design can then be adapted to the shape of the wall recess 4.
• the essence of the invention that is, the configuration of the sealing element 16 for peripheral

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Lift Valve (AREA)
• Safety Valves (AREA)
• Control Of Fluid Pressure (AREA)

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• 2018
  • 2018-07-13 AT ATA50604/2018A patent/AT521399B1/de active
  • 2018-08-21 KR KR2020180003886U patent/KR200494011Y1/ko active IP Right Grant
  • 2018-08-21 CN CN201821351423.8U patent/CN208951368U/zh active Active
• 2019
  • 2019-07-10 CN CN201980045655.1A patent/CN112368498B/zh active Active
  • 2019-07-10 KR KR1020217001024A patent/KR20210030934A/ko unknown
  • 2019-07-10 WO PCT/EP2019/068600 patent/WO2020011881A1/de active Application Filing

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