EP3329567A1 - Explosion-proof arrangement and method for producing the same - Google Patents
Explosion-proof arrangement and method for producing the sameInfo
- Publication number
- EP3329567A1 EP3329567A1 EP16735655.9A EP16735655A EP3329567A1 EP 3329567 A1 EP3329567 A1 EP 3329567A1 EP 16735655 A EP16735655 A EP 16735655A EP 3329567 A1 EP3329567 A1 EP 3329567A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner body
- explosion
- proof
- longitudinal direction
- connecting sleeve
- 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- Withdrawn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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/088—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
- H01H9/042—Explosion-proof cases
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/013—Sealing means for cable inlets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/06—Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
- H02G3/0616—Joints for connecting tubing to casing
- H02G3/0625—Joints for connecting tubing to casing with means for preventing disengagement of conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/081—Bases, casings or covers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
Definitions
- the invention relates to an explosion-proof An ⁇ order and a method for their preparation.
- the explosion-proof arrangement serves to guide at least one line with at least one electrical and / or optical conductor explosion-proof through a feedthrough part.
- the feedthrough member may be ⁇ example as an integral part of a wall of a potentially explosive ⁇ protected housing.
- the lead-through part can also be an insert, which in turn is arranged in a wall of an explosion-proof housing.
- the at least one line can be a line with egg ⁇ nem or more insulated electrical conductors or
- the ex ⁇ plosionsgethete assembly includes a cable connection ⁇ device having an outer sleeve and an inner sleeve.
- the sleeves are arranged coaxially with each other and the cable is passed through the inner sleeve.
- the outer sleeve has ei ⁇ nen crimp. This consists of plastically ver ⁇ malleable material.
- the inner sleeve is elastically deformable. By deforming the crimping section of the outer sleeve, an elastic deformation of the inner sleeve arranged between the cable and the outer sleeve is achieved.
- the explosion-proof assembly comprises a development section, an annular space enclosed by a connection sleeve ⁇ inner body and at least one conduit, preferably with a plurality of electrical
- the line can go through Cable may be formed with a plurality of electrical and / or optical conductors.
- the at least one conductor may be formed from a single wire or from a plurality of individual wires and / or by an optical fiber or an optical fiber bundle.
- the at least one conductor may also be formed by a rigid body, for example a rail, a pin or a bolt, in the direction of the direction of extension of the normally acting forces.
- the at least one leadthrough part there is a passage opening which extends in a longitudinal direction completely through the leadthrough part and is delimited by an leadthrough area.
- the inner body consists of an elastically and / or plastically deformable material, in particular a
- the inner body may be designed as an elastomeric body.
- the inner body is preferably made integral oh ⁇ ne seam and joint. It is not poured during or for connection to the conduit, but provided as a three-dimensional body.
- Each inner body has at least one duct extending longitudinally through the inner body.
- Each conductor of the at least one line extends through a duct of the inner body.
- each conductor is preferably carried by a sheath and it can be further preferably insulated by the sheath and / or by the inner body electrically opposite the connecting sleeve, if an electrical conductor is present.
- the at least one connecting sleeve consists of a plastically deformable material.
- the connecting sleeve is preferably designed integrally without seam and joint.
- the connecting sleeve can for example consist of a metal-containing material, in particular of a steel or aluminum or an alloy thereof.
- a special feature of the explosion-proof arrangement according to the present invention is that the non-positive connection of the connecting sleeve with the line by the plastic forming a portion of the outer ⁇ .
- a first boundary ⁇ surface is formed.
- the detailed surface of the implementing ⁇ opening approximately in the development section forms a second Be ⁇ grenzungsthesis.
- the first and the second boundary surface form an ignition-punctured Ex-gap.
- the outer dimensions of the first boundary surface adapted to the inner dimensions of the feedthrough ⁇ area and the second boundary surface, so that by arranging the connecting sleeve or de- Ren connecting portion forms in the passage opening and in particular by inserting the connecting sleeve with the inner body in the longitudinal direction in the passage opening of the ignition-proof Ex-gap.
- This arrangement can be made very simple, inexpensive and fast.
- the plastic deformation of the connec ⁇ tion section is generated by the action of a mechanical force from the outside to the connecting portion.
- a cohesive connection between the inner body and the conduit and between the connecting sleeve and the inner body is preferably not provided.
- the plastic deformation of the connecting sleeve can be achieved in particular by a forming process such as extruding or pressing or rolling.
- the passage member may also be made of a metal-containing material or of steel. It may alternatively be made of plastic. Preferably, the passage member is gebil ⁇ det by a casting.
- the inner body rests directly on the conductor or its sheathing without ignition gaps. It is also advantageous if the connecting sleeve rests directly on the inner body without ignition gaps.
- a conductor is led through an existing legiska ⁇ nal accuracy.
- a cable with several ⁇ ren insulated conductors can be freed to perform on the outer sheath and the individual wires through each one to- ordered line channel are performed.
- a conductor may be present.
- a closure means in particular a sealing plug, be introduced or used, preferably before the plastic forming of the connecting portion.
- the arrangement is preferably designed for carrying out the line in a flameproof enclosure (Ex-d).
- the ignition-punctured Ex-gap is designed as an air gap.
- a filling, in ⁇ example by a cast material or adhesive is eliminated. This makes it possible to non-destructive NEN ⁇ the connection between the connecting sleeve and the passage part.
- the first boundary surface is arranged coaxially with the region in which there is a flameproof connection between the inner body and the at least one conductor of the line.
- the first Begren ⁇ out area of the plastically deformed deformation portion and the second limiting surface are each designed as areas without pits and projections.
- the surfaces are designed as flat surfaces, so to speak.
- the two boundary surfaces can be thread-free.
- the resulting in this embodiment Ex-gap has the Kon ⁇ tur of a circumferentially completely or partially ge ⁇ closed annular gap.
- the first boundary surface and the second limiting surface coaxial to each other are arranged ⁇ , there is a hollow cylindrical former gap.
- the cross-sectional contours of the connecting sleeve or the connecting portion and the passage opening are adapted to form the Ex-gap to each other.
- the outer dimensions of the first boundary surface of the plastically deformed connecting portion slightly klei ⁇ ner than the inner dimensions of the second boundary surface and implementing surface, so that the connecting portion can be easily arranged in the passage opening, without formation of a press fit.
- the cross-sectional shapes can be chosen arbitrarily in principle.
- the first boundary surface and the lead-through surface or second boundary surface may have a polygonal, oval, elliptical or any other desired cross-section. It is preferred in each case when both of the two boundary surface has a circular cross-section aufwei ⁇ sen.
- the tantsab ⁇ section extends substantially over the entire length of the connecting sleeve in the longitudinal direction.
- This is to be understood as a connecting section whose length in longitudinal direction direction is at least 70% or at least 80% or at least 90% of the total length of the connecting sleeve.
- the connecting sleeve in addition to the connecting portion only at one or both axial ends in each case an axial end, which forms a chamfer in ⁇ example, each.
- the connection sleeve can be formed by extrusion or rolling or rolling and thereby mechanically connected to the line, which is very simple and inexpensive.
- the length of the kaushül ⁇ se in the longitudinal direction is smaller than the length of the inner body, which thereby protrudes from the connecting sleeve.
- the connecting sleeve may have at both axial longitudinal ends in each case at least one radially projecting radially inwardly to the longitudinal direction in ei ⁇ ner radial direction.
- the length of the connecting sleeve in the longitudinal direction is greater than the length of the inner body.
- the ⁇ we tendonss a radial projection is preferably an integral part of the connecting sleeve.
- the inner body may be arranged in a preferred embodiment in the longitudinal direction between two rigid support plates.
- the holding plates cover the axial end surfaces of the inner body and have at least one hole in order to guarantee the accessibility to the at least one Lei ⁇ underflow channel.
- the holding ⁇ plates and the inner body have the same hole pattern, so chipsel ⁇ be arrangement pattern of holes or ducts.
- the radial dimension of the holding plates is smaller in a radial direction perpendicular to the longitudinal direction than the radial ⁇ dimension of the inner body in its initial state before the plastic deformation of the connecting portion.
- the holding plates can each be arranged between the at least one radial projection and the inner body.
- the holding plates are preferably not stoffschlüs ⁇ sig or otherwise directly connected to the inner body, but are applied to this and are held by the connecting sleeve. It is advantageous if Zvi ⁇ rule the support plates and the connecting sleeve has a rotation lock is provided to prevent relative rotation in the circumferential direction about the longitudinal direction.
- the securing device is adapted to the connecting sleeve on the leadthrough part To secure against unwanted relative movement in the longitudinal direction. In particular, this ensures that the deformation section with the first boundary surface does not leave the passage opening, so that the length of the Ex gap is maintained in the longitudinal direction.
- the fuse ⁇ means may comprise, in one embodiment at least one radially outwardly elastically movable and / or deformable securing part such as a snap ring.
- the securing device may have a rigid axial stop on the passage part. The connection ⁇ sleeve can be secured by the axial stop and the securing part against unwanted relative movement in the longitudinal direction relative to the passage part.
- the connecting sleeve has a chamfer on at least one axial end.
- the Fa ⁇ se is preferably provided only at the axial end, which is associated with the insertion opening of the connecting sleeve in the longitudinal direction of the passage opening of the leadthrough part.
- the securing device for example the snap ring, can be pushed apart when inserting the connecting sleeve into the lead-through opening and enables a simple and tool-free insertion of the connecting section or the connecting sleeve into the passage opening.
- the entire backup ⁇ means may be integral part of the lead-through part and engage around the connection sleeve on both axial sides, so to speak.
- the through portion may be formed in this embodiment, for example, by two mutually verbindba ⁇ re-shells which after their connection, the Secure the connection sleeve against movement in the longitudinal direction.
- the shells each have a peripheral portion of the lead-through surface and form the lead-through ⁇ opening when they are connected to each other such that the peripheral portions complement each other to the circumferentially ge ⁇ closed guide surface.
- the explosion-proof arrangement can be produced as follows:
- a development section with the imple ⁇ approximately opening is provided.
- the passage opening is limited by a passage area in the circumferential direction.
- at least one connecting sleeve made of a plastically deformable material is provided, which encloses an elastically and / or plastically deformable inner body.
- the inner body has at least one duct extending longitudinally through the inner body.
- the at least one conductor of the at least one Lei ⁇ tion is guided through the respectively associated conduit of the inner body.
- Kirska ⁇ ducts are not used are preferably closed by a sealing plug.
- the connection sleeve is plastically deformed in the region of the connection section.
- the plastically deformed section outer surface of the connecting ⁇ section of the connecting sleeve is referred to as the first boundary ⁇ surface.
- the cross-sectional area in the kausab cut ⁇ or the first limiting surface is reduced during plasti ⁇ rule forming. Due to the plastic deformation, the connecting sleeve is mechanically connected to the inner body and to the conduit or the at least one NEN ladder in at least one duct to a building ⁇ unit.
- This connection is non-positively and optionally additionally positive and in particular not material ⁇ conclusive.
- the passage area of the lead-through opening constitutes a second boundary surface, wherein an ignition-blow-proof Ex-gap is formed between the two boundary surfaces.
- connection sleeve can be secured against an undesirably large relative movement with respect to the passage part in the longitudinal direction. This backup can already be generated during the placement of the connecting portion in the passage opening.
- the plastic deformation of the connecting portion or the connecting sleeve is preferably carried out by Frustpres ⁇ sen or by pressing or rolling.
- connection sleeve 2 is a schematic representation of the connection sleeve and the inner body of an embodiment of the explosion-proof arrangement in a longitudinal view
- connection ⁇ sleeve and the inner body of FIG. 2 in a longitudinal ⁇ cut
- FIGS. 2 and 3 shows a schematic representation of an embodiment of an explosion-proof arrangement with the connecting sleeve and the inner body according to FIGS. 2 and 3 in a longitudinal section
- Fig. 5 is a schematic representation of an exporting ⁇ approximately example of connection sleeve and a réellekör ⁇ pers with support plates in a view in the longitudinal direction,
- connection ⁇ sleeve is a schematic representation of the connection ⁇ sleeve, the inner body and the retaining plates of FIG. 5 in a longitudinal section
- FIGS. 5 and 6 are schematic representations of an embodiment of an explosion-proof arrangement with the connecting sleeve, the inner body and the retaining plates of FIGS. 5 and 6 in a longitudinal section,
- Fig. 8 is a schematic representation of a longitudinal section through ⁇ an embodiment of a potentially explosive ⁇ protecting arrangement with a locking device
- Fig. 9 is a schematic representation of an exporting ⁇ approximately example of a lead-through part in Eiber Vorderan ⁇ view
- 10 is a schematic representation of the lead-through part from FIG. 9 in a plan view
- FIG. 9 is a schematic representation of an exporting ⁇ approximately example of a lead-through part in Eiber Vorderan ⁇ view
- 10 is a schematic representation of the lead-through part from FIG. 9 in a plan view
- Fig. 11 is a schematic representation of an example ⁇ adhere plastic deformation for the preparation of the compound.
- Fig. 12 shows an alternative embodiment possibility for forming the connecting sleeve by means of rollers.
- an explosion-proof assembly 20 is beschrie ⁇ ben reference to preferred execution ⁇ examples as ver ⁇ anschaubit example, in FIGS. 1, 4, 7 and 8.
- the explosion-proof arrangement 20 serves to pass a line 21 through a wall, for example a wall of a housing and in particular a flameproof enclosure (Ex-d).
- the conduit 21 can be guided by means of the explosion-proof arrangement 20 from a potentially explosive atmosphere through the wall into an explosion-proof area, eg into the interior of an explosion-proof housing.
- the line 21 has at least one electrical and / or optical conductor 22 or a plurality of conductors 22.
- Each conductor 22 may be formed by a single wire or a plurality of wires as a strand and / or by an optical fiber or an opti ⁇ cal fiber bundle.
- Each electrical conductor 22 may have its own electrical insulation.
- Each electrical and / or optical conductor 22 may have a Ummante- ment.
- the line 21 may be designed as a multi-core cable, the conductors 22 may be formed, for example, each by ei ⁇ ne vein. Alternatively, it is also possible that a conductor 22 is formed by a rigid body, such as a bolt, a pin or the like.
- the explosion-proof assembly 20 has a through ⁇ guide member 23 at a through opening 24 which passes completely through the through part 23 in a longitudinal direction L.
- the passage opening 24 has a circular cross section with a constant diameter.
- the passage opening 24 is in a circumferential direction tion U about the longitudinal direction L bounded by a lead-through surface 25.
- the execution portion 23 can be an integral part of the Be ⁇ standing wall, for example the wall of a explosi ⁇ onsgelongten housing. It can also be designed as a separate part, as it is flame-proof provided in the wall, for example by a Gewindever ⁇ bond and / or a material connection (gluing, welding, etc.).
- the explosion-proof arrangement also includes a structural unit 29, which has a connecting sleeve 30 and an inner body 31.
- the connecting sleeve 30 is made of a plastically deformable material, for example of a metal or a metal alloy and may contain steel or aluminum.
- the inner body 31 is at right angles to the longitudinal direction L in a radial direction R elastic and / or plastically deformable. It contains, for example, an elastomer or is designed as an elastomeric body.
- the connecting sleeve 30 completely surrounds the inner body 31 in the circumferential direction U.
- the outer diameter of the inner body 31 corresponds to the inner diameter of the connecting sleeve 30, so that the inner body 31 rests on the inside of the connecting sleeve 30 and can be held, for example, non-positively on the connecting sleeve 30.
- the inner body 31 In the longitudinal direction L of the inner body 31 is fully ⁇ constantly traversed by at least one duct 32 in the longitudinal direction L. For each conductor 22, a separate conduit 32 is provided in the inner body 31.
- the number of line channels 32 is at least as large as the number of conductors 22 to be performed.
- the cross-sectional contour of a line channel 32 is at the cross-sectional contour of to be performed conductor 22 adapted and, for example, circular. Other angular or cornerless cross-sectional ⁇ shapes are possible.
- the connecting sleeve 30 has a connecting portion 33.
- the connecting portion 33 extends substantially over the entire first length LI of the connecting sleeve 30.
- the connecting portion 30 preferably at least 70% or 80% or 90% of the total first length LI occupies.
- the connecting portion 33 extends over the entire first length LI of the connecting sleeve 30.
- the assembly 29 is mechanically and preferably non-positively connected to each other and to the conductors 22 of the line 21.
- the connecting section 33 has a first diameter D1 (FIGS. 2 and 5) which, after the plastic deformation, is reduced to a smaller second diameter D2 (FIGS. 4 and 7).
- the conductors 22 are guided through the conduit channels 32 and inserted according to the example in the longitudinal direction L.
- the plastic deformation of the connecting sleeve and the connecting portion 33 of the inner body is elastically deformed and / or plastically in the radial direction ⁇ R 31 and presses against the guided through the ducts 32 conductor 22.
- the deformable inner body 31 defines zündspalt- free to the ladder 22 at.
- the inner surface of the connecting sleeve 30 is pressed against the outer peripheral surface of the inner body 31 in an ignition-gap-free manner.
- the line 21 or its conductor 22 is ignition-proof connected to the assembly 23.
- a cohesive connection between the conductors 22 and the inner body 31 on the one hand and between the inner body 31 and the connecting sleeve 30 is not present.
- the Ver ⁇ bond is purely mechanical.
- the outer surface of the connecting portion 33 is referred to as a portion outer surface 34.
- This section ⁇ outer surface 34 is formed by the plastic deformation of the Verbin ⁇ extension portion 33 to a first defining surface 35 to ⁇ formed, having the second diameter D2.
- a second boundary surface 36 is formed by the guide surface 25.
- the first delimiting surface 35 and the second Begren ⁇ out area 36 are preferably be in the longitudinal direction L ⁇ seeks made flat without projections and recesses, so that when a coaxial arrangement of the connecting sleeve
- the Ex-gap 37 results.
- the Ex-gap 37 may also have symmetrical and, for example, a crescent-shaped cross section.
- the first boundary face 35 is located coaxially to the region in which the ignition spark resistant connection between the inner body 31 and the conductors by the pressing of the inner body 31 against the conductor 22 in Lei ⁇ processing channel 32 is formed.
- the ex-gap 37 is vorzugswei ⁇ se designed as an air gap and not filled by casting agent or other fillers.
- the two boundary surfaces 35, 36 may each have a mutually matching thread, so that the Ex-gap 37 can be formed at least partially by a threaded ⁇ gap.
- the described preferred embodiments are the two boundary surfaces 35, 36 each curved corner and kan ⁇ of charge in cross-section and, for example circular.
- the first length LI of the connecting sleeve 30 is smaller than a second length L2 of the inner body 31.
- the inner body 31 protrudes, for example, at its two axial ends
- the inner body 31 has a second length L2, which is able to dress ⁇ ner than the first length LI of the connecting sleeve 30.
- each radial projection 41 is formed by a circumferentially U annularly closed radial flange.
- a plurality of radial projections 41 distributed in the circumferential direction U could be arranged at a distance from each other.
- the distance between arranged on opposite sides of radial projections 41 is greater than the second length L2 of the inner body 31.
- a holding ⁇ plate 43rd arranged between the two opposite in the longitudinal direction L end faces 42 of the inner body 31 and the respectively adjacent at least one radial projection 41.
- the holding plate 43 is applied to the supplied ⁇ associated end surface 42 and is held captive by the adjacent at least one radial projection 41st
- At least one hole 44 is provided on the support plate 43 to allow access to the at least one duct 32 for passage of the conductors 22.
- the number of holes 44 corresponds to the number of line channels 32.
- the arrangement of the holes 44 is selected such that they are aligned with the line channels 32.
- the diameter of the holes 44 can be selected to be larger than the diameter of the ducts 32, so that any relative displacement due to the deformation of the inner body 31 is taken into account.
- Fig. 6 it can be seen that in the undeformed Initial state of the connecting sleeve 30 of the gleich tellmes ⁇ ser of the inner body 31 is greater than the outer diameter of the holding plates 43, whereby a game S remains.
- This play S stands for the plastic forming and the diam ⁇ serverring réelle of the connecting portion 33 and the Ver ⁇ connection sleeve 30 for disposal.
- the holding plates 43 are not deformed during forming of the connecting sleeve 30.
- the inner diameter of the connection ⁇ sleeve 30 and the joint portion 33 corresponds to the plasticized ⁇ rule forming the outer diameter of the holding plates 43 (Fig. 7).
- the holding plates 43 are preferably made of a metal or a metal alloy and may be made of the same material as the connecting sleeve 30.
- a hedging device ⁇ 47 is illustrated.
- To the securing device 47 includes a first stop 48 and a longitudinally spaced at L second stop 49.
- the first stop 48 is perennialsbei ⁇ play an integral part of the leadthrough 23 and limits the passage opening in the longitudinal direction L on one side.
- the first stop 48 has a hole 50 through which the conductors 22 and the line 21 can be passed, wherein the diameter of the hole 50 is sufficiently small, so that the assembly 29 in the longitudinal direction L does not fit through.
- the second stop 49 also has a hole 50 for the implementation of the conductors 22 and the line 21 with an outer diameter which is smaller in its securing position than that of the connecting sleeve 30.
- the second stop 49 is movable in the embodiment in the radial direction R and / or deformable. From the securing position of the second stop 49 is therefore moved radially to the outside for insertion of the assembly 29 into the passage opening 24 and / or deformed.
- the second stop 49 is formed, for example, by a deformable securing element 51, which is designed here as a snap ring.
- the snap ring is designed C-shaped and not completely closed in the circumferential direction U about the longitudinal direction L, but slotted at one point. He can therefore expand when passing through the assembly 29.
- the fuse element 51 and the snap ring assumes its unexpanded fuse Stel ⁇ lung (rest position) when the unit is completely arranged in the through opening 24 29th This securing or rest position of the securing element 51 is illustrated in FIG. 8.
- the securing element 51 or the snap ring is arranged in a circumferential groove in the passage portion 23 adjacent to the passage opening 24.
- a radial clearance between the bushing part 23 and the securing element 51 is present, so that it can expand for passage of the assembly 29th
- a bevel 52 is present on the connecting sleeve 30 in order to simplify the insertion of the assembly 29 into the passage opening 24.
- the chamfer 52 is optional. They may be present as an alternative to the Darge ⁇ embodiment presented also on the insertion of the fuse element 51 and the snap ring.
- the snap ring or the fuse ⁇ element 51 is widened and the assembly 29 are removed from the through ⁇ guide opening 24 against the insertion again.
- a releasable movement assurance between the assembly 29 and the lead-through part 23 is produced by the securing device 47.
- the securing of the relative movement between the structural unit 29 and the bushing body 23 in the longitudinal direction L need not be such that any relative movement is prevented. It is sufficient to limit the relative movement in the longitudinal direction L such that the ex-gap 37 ver ⁇ is not shortened to the Zünd manschlag redesign to beeintrumble ⁇ term.
- the assembly 29 is arranged completely in the passage opening 24. In a modification to this, a part of the assembly 29 may protrude through one of the holes 50 from the passage opening 24. It is sufficient if the first boundary surface 35 of the connecting sleeve 30 is arranged inside the through opening 24, so that the two boundary surfaces 35, 36 form and maintain the ex-gap 37.
- FIGS. 9 and 10 illustrate a further embodiment variant of a leadthrough part 23, which has a securing device 57 with the stops 48, 49.
- the passage member 23 is formed from two shells 56 which are connected to each other and / or connected.
- the two shells 56 are connected to one another via a film hinge 57 on a longitudinal edge running in the longitudinal direction L.
- the film hinge 67 forms a pivot bearing point to the two shells 56th to pivot relative to each other.
- Each shell includes a peripheral portion 25a of the lead-through surface 25.
- the two stops 48, 49 are also each partially on the two shells 56 available. By way of example, on each shell 56 there is a semicircular part of each stop 48 and 49, respectively.
- the structural unit 49 can be inserted into one of the shells 56 when the lead-through part 23 is opened.
- An ⁇ closing the two shells are folded by means of the film hinge 57 ⁇ each other, as is schematically illustrated in Fig. 9 by the arrow P.
- the two ⁇ An impact parts of a stopper 48, 49 are complemented so that the assembly 29 is secured within the through opening 24 in the longitudinal direction L.
- the explosion ⁇ protected arrangement can be made 20th
- the development section 23 can have a thread and in particular an Au ⁇ male thread 58, by means of which it can be screwed explosion protected in a threaded hole in the wall.
- Fig. 11 is a highly schematic illustrating a way to plastically transform the connecting sleeve 30 and the Ver ⁇ connecting portion 33 and produce the ignition puncture-proof assembly 29th
- the ⁇ out the conductors 22 through the ducts 32 of the inner body 31 and arranged in a die tool 62 having a Umformkanal 63rd
- the forming channel 63 tapers at one or more points in order to reduce the diameter of the assembly 29 from the first diameter D1 to the second diameter.
- the connection sleeve 30 may be executed for ⁇ nally so that a chamfer 52 remains on the formed connection sleeve 30, which is simplified in Fig. 11 is illustrated.
- the forming of the connecting sleeve 30 is carried out by extrusion or by pressing and in particular by forward extrusion.
- the assembly 29 with the connection ⁇ sleeve 30 is pressed in the longitudinal direction L by the channel 63 of the die tool 62.
- the Umformkanal 63 is from ⁇ sectionally circular cylindrical shape or tapers conically between the cylindrical sections of different diameter.
- the cross section of the Umformkanals 63 is adapted at its input portion to the outer cross section of the not yet formed connecting sleeve 30.
- the other end portion of the Umformkanals 63 corresponds to the cross ⁇ section , which should have the connecting sleeve 30 after the plastic forming.
- the punch 64 may have two concentrically arranged punch parts, which are each adapted to the cross section ⁇ a portion of the Umformkanals 63 to move the connecting sleeve 30 and the assembly 29 through the forming channel 63 can.
- the assembly 29 can be moved completely in the same direction of movement through the forming channel 63.
- an ejector it is also possible for an ejector to be provided on the other side of the forming channel 63, which after the plastic deformation converts the formed structural unit 29 in the opposite direction through the forming channel 63. the moved out.
- FIG. 12 Another possibility for reshaping the connecting sleeve 30 or the assembly 29 is illustrated schematically in FIG. 12.
- a rolling device 68 with two rolling tools 69 is illustrated.
- Each rolling tool 69 can rotate about a respective axis of rotation D.
- the two axes of rotation D of the two rolling tools 69 are arranged at a distance from one another, so that a clearance remains between the two rolling tools 69.
- This clearance or the distance between the rolling tools can be adjusted so that the connecting sleeve 30 at least in connec ⁇ tion section 33 receives the plastically deformed, reduced second diameter D2.
- the connecting sleeve 30 or the assembly 29 could also be formed between two plate-shaped forming tools which move in parallel alignment relative to each other, so that the connecting sleeve 30 rolls between the two plate-shaped forming tools, while the Distance between the two plate-shaped forming tools is adjusted so that the diameter of the connecting sleeve 30 is reduced to the two ⁇ th diameter D2.
- the invention relates to an explosion-proof An ⁇ order 20.
- the assembly 20 has a passage portion 23 with a passage opening 24 which is bounded by a lead-through surface 25.
- a unit 29 is arranged in theticiansöff ⁇ tion 24 .
- the structural unit 29 has an elastically and / or plastically deformable inner body 31 with at least one conduit 32 completely passing through in a longitudinal direction L.
- the inner body 31 is of a plastically deformable connection training sleeve 30 of the assembly 29 enclosed in a circumferential direction U about the longitudinal direction L.
- At least one conductor 22 of a conduit 21 is passed through in each case an associated conduit 32 in the inner body 31.
- a connecting portion 33 of the connecting sleeve 30 is plas ⁇ schematically deformed so that it presses and radially inward to the inner body 31 that is deformed in the radial direction R radial to the longitudinal direction L.
- the inner body presses against the at least one conductor 22 by means of the at least one duct 32 led ⁇ ignition resistant.
- the inner body 31 pushes against ignition of the connecting sleeve 30.
- the feedthrough ⁇ surface 25 is formed on the outer ⁇ circumferentially forming a second limiting surface 36.
- the assembly 29 By positioning the assembly 29 with the first defining surface 35 is formed in the lead-through opening 24 between the two boundary surfaces 35, 36 is a zünd mantschsiche- rer ex-gap 37.
- the assembly 29 is arranged by an insertion movement in the longitudinal direction L in the feed-through opening 24 and secured for example via a Si ⁇ cherungs adopted 47 against unwanted Relativbewe ⁇ supply in the longitudinal direction L on the leadthrough part 23rd
- the Ex-gap 37 is preferably thread-free.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Power Engineering (AREA)
- Installation Of Indoor Wiring (AREA)
- Details Of Indoor Wiring (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015112284.7A DE102015112284A1 (en) | 2015-07-28 | 2015-07-28 | Explosion-proof arrangement and method for the production thereof |
PCT/EP2016/065820 WO2017016820A1 (en) | 2015-07-28 | 2016-07-05 | Explosion-proof arrangement and method for producing the same |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3329567A1 true EP3329567A1 (en) | 2018-06-06 |
Family
ID=56360407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16735655.9A Withdrawn EP3329567A1 (en) | 2015-07-28 | 2016-07-05 | Explosion-proof arrangement and method for producing the same |
Country Status (5)
Country | Link |
---|---|
US (1) | US10312674B2 (en) |
EP (1) | EP3329567A1 (en) |
CN (1) | CN108028518B (en) |
DE (1) | DE102015112284A1 (en) |
WO (1) | WO2017016820A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017125205A1 (en) * | 2017-10-27 | 2019-05-02 | R. Stahl Schaltgeräte GmbH | Method for producing an explosion-proof cable feed-through and explosion-proof cable feedthrough |
DE102018119947B4 (en) * | 2018-08-16 | 2020-07-09 | R. Stahl Schaltgeräte GmbH | Explosion-proof arrangement |
DE102019116164B3 (en) * | 2019-06-13 | 2020-12-10 | R. Stahl Schaltgeräte GmbH | Explosion-proof housing with a reinforcement frame |
DE102019117409A1 (en) * | 2019-06-27 | 2020-12-31 | R. Stahl Schaltgeräte GmbH | Explosion-proof arrangement |
CN110391635A (en) * | 2019-07-23 | 2019-10-29 | 中达电机股份有限公司 | Explosion-proof lead connecting sleeve |
DE102020106044A1 (en) | 2020-03-05 | 2021-09-09 | Pepperl+Fuchs Se | Explosion-proof device |
DE102021104380A1 (en) * | 2021-02-24 | 2022-08-25 | Lisa Dräxlmaier GmbH | PASPOL LIGHT GUIDE AND METHOD OF MAKING A PASPOL LIGHT GUIDE |
CN113363929B (en) * | 2021-05-21 | 2022-04-19 | 广州番禺电缆集团有限公司 | Linkage explosion-proof control method and device for cable joint explosion-proof isolation equipment |
CN114040614B (en) * | 2021-11-12 | 2023-03-28 | 陕西智引科技有限公司 | Mining explosion-proof data transmission substation |
PL440336A1 (en) * | 2022-02-09 | 2023-08-14 | Produced In Internet Spółka Z Ograniczoną Odpowiedzialnością | Method and a gland for attaching a cable, especially electric cable |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4323727A (en) * | 1980-10-21 | 1982-04-06 | Crouse-Hinds Company | Cable strain relief and sealing apparatus |
DE8809419U1 (en) * | 1988-07-23 | 1988-09-01 | Felten & Guilleaume Energietechnik AG, 5000 Köln | Wire feedthrough for pressure-resistant rooms |
GB2252210B (en) * | 1990-12-10 | 1994-08-17 | Cmp | Disconnectable cable gland assembly |
FR2694655B1 (en) * | 1992-08-10 | 1994-10-28 | Aerospatiale | Device for watertight crossing of a partition by cables such as electric cables. |
US5399807A (en) * | 1993-08-26 | 1995-03-21 | Cooper Industries, Inc. | Explosion-proof electrical apparatus and method of assembly |
SE0402641L (en) * | 2004-11-01 | 2006-04-18 | Abb Technology Ltd | Electrical conduction and ways of producing an electrical conduit |
EP1841032A1 (en) * | 2006-03-31 | 2007-10-03 | G. Kromschröder Aktiengesellschaft | Heat resistant cable feedthrough |
EP2048673B1 (en) * | 2007-10-12 | 2014-05-14 | ABB Research Ltd. | A device for electric connection, a method for producing such a device, and an electric power installation provided therewith |
KR101744997B1 (en) * | 2011-08-25 | 2017-06-09 | 현대자동차주식회사 | Screening conductor for vehicle |
DE102012105113A1 (en) * | 2012-06-13 | 2013-12-19 | R. Stahl Schaltgeräte GmbH | Implementation device for an explosion-proof housing |
DE102012111270B4 (en) | 2012-11-22 | 2018-11-22 | R.Stahl Schaltgeräte GmbH | Explosion-proof arrangement with a cable connection device and a cable |
-
2015
- 2015-07-28 DE DE102015112284.7A patent/DE102015112284A1/en not_active Withdrawn
-
2016
- 2016-07-05 CN CN201680044178.3A patent/CN108028518B/en not_active Expired - Fee Related
- 2016-07-05 EP EP16735655.9A patent/EP3329567A1/en not_active Withdrawn
- 2016-07-05 US US15/748,544 patent/US10312674B2/en not_active Expired - Fee Related
- 2016-07-05 WO PCT/EP2016/065820 patent/WO2017016820A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
DE102015112284A1 (en) | 2017-02-02 |
WO2017016820A1 (en) | 2017-02-02 |
CN108028518A (en) | 2018-05-11 |
CN108028518B (en) | 2021-06-11 |
US10312674B2 (en) | 2019-06-04 |
US20180226781A1 (en) | 2018-08-09 |
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