DE7244355U - Heater with tubular heating elements - Google Patents

Description

Patent attorney DipL-Phys. Gerhard Liedl 8 Munich 22 Steinsdorfstr. 21-22 Tel. 29 84

A 5851

BLECKMANN & CO., SALZBURG, C Austria

Heater with tubular heating elements

The invention relates to a heater with tubular heaters, in particular a household stove with an oven, grill, infrared heater or the like, each tubular heating element with its end an opening in a flange end plate or other bracket of the heater or in the heater itself.

In the case of the one mentioned at the beginning. Device one differentiates z ^, vischen one so-called liquid-tight heating devices and such heating devices,

• ·

i where the liquid or gas density is not required. The latter is e.g. for ovens, grills, infrared heaters, etc. Case.

It is known to provide a first element, for example the flange end plate of the heater, through which the tubular heating element penetrates and in which it is non-liquid-tightly attached. Furthermore, a second element is provided, usually in the form of a rubber seal, causes the f- f'üssigkeitsdichte sealing the Beiestigungsstelle.

With both types of fastening, the liquid-tight as well as the non-liquid-tight, it is also possible to provide the fastening in such a way that the tubular heating element is soldered to the flange end plate at the point at which it penetrates the opening of the flange end plate. However, this type of fastening requires a relatively high amount of work and is therefore very expensive. In order to avoid this, another type of fastening, the so-called clamp fastening, is therefore generally used, in which a distinction is made essentially between two embodiments. In one embodiment, the walls of the openings in the flange end plate receiving the tubular heating elements are pulled out so that they each form a collar enclosing the tubular heating element over a certain distance. This collar is then reduced in diameter after the tubular heating element is inserted by pressure exerted radially on it, whereby a clamping connection is established between the flange end plate and the tubular heating element. In this case, it is possible to press out the collar delimiting the opening, not round, but for example hexagonal, in order to achieve protection against rotation for the tubular heating element at the same time.

In the other known embodiment of the clamp fastening the flange end plate is also provided with openings and collars adjoining them, which are, however, lower than the collars in

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of the embodiment described above. After inserting the Roh'rheizkörpers in the opening of the FlanoChabschluIipJatte Aurd of the tubular heater surrounding collar then by means of an E instauchwerkzeuy 's together compressed in the axial direction, so that it disappears unl to uci DUI ν "iiiiCSGCr eic rc ^4; G η tube hot?><> Γπργ Fmfnahmenden opening is reduced in such a way that the tubular heating element is clamped in the flange end plate.

However, these two types of attachment have significant disadvantages. f ~~ The material for the flange end plates must be sufficiently expandable

be able, otherwise the collar bordering the openings in the Crack cold deformation. But that means that the entire flange plate must be made of a material that corresponds to the

j th requirement is sufficient and therefore increases the total costs. Furthermore it is

ι not possible to loosen the clamp fastening for the stirrer heater without

that the Fianschpiatte and mostly also the tubular heater is destroyed.

However, this loosening of the clamp fastening is often required when For example, a tubular heater must be replaced or eggs initial setting in the flange end plate was incorrectly adjusted or due to incorrect setting of the clamping press, which affects the radial '"" "or axial pressure exerted on the collar delimiting the openings, displaced Has. In such cases, the flange plate must be sawed open to loosen the fastening, which makes the plate unusable and often also the tubular heater is damaged.

The invention is therefore based on the object of eliminating these disadvantages and to create a device by means of which the tubular heating element - both liquid-tight and non-liquid-tight - without much warning .. ' can be fixed and released again in a heater.

To solve this problem, the invention provides that the Voi-

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ru-hiu-L; L ⁵ Js clamping piece is formed from a. m from the plane.: ■. ·: ■ F] ;: nschak-Schlußplatte at least in one place and at least in '. ■ :: -. L .-; -' i (. ■ ":. · v.ng kr .ie Hebeliönr «.ig bent out as well as next to the opening a: ue · ■ l: K-; e: '. Ordered sheet metal part and in the relaxed state the pipe hinge :: · .-., iver'.: .se attached- sov. ' ie by bending in the direction of the flange a: ->.: -. lu. ^; : ΐΛ'-ie in ·: -1: κ · γ. can be bent in the clamped state in which the one S,:. · .- :: r : cl of the KlemmsLÜckes the tubular heater in an approximately radial direction - ".-. :: ■ .., ..--- .. O: ^{1. The} wall of the opening opposite this leg presses u: ..; de. others Legs of the clamping piece are attached to a stationary one

■■ · ί ·

the use of such a clamping piece results in terms of ^: · ■ -. i'es: igur.g eim.-s tubular heating element in the opening! for example the nsrhab.schlussplaue of the heater, significant advantages. So -ri; oiis the manufacturing costs for the flange end plate can be significantly or.k; v.crdi: \ because it is only necessary that the tubular heating elements h: i :: h-; h1l :; Punching openings in the flange plate instead of forming the ÜKnur.gen with adjacent collars, as was the case up to now. . Furthermore, (:: <"down the tubular heating means of the present invention: n :: ^- / OERP 'rs in the opening' !. sweet .ck (s possible in a simple manner, since after insertion of the tube /.. '. only on the knee of the adhesive piece so (■ pressure '.' k must be exerted. until the clamping piece is bent in the direction of '!' ■: ■! ¹ KiHS (Iu? bschlul ^ plate and the leg of the clamping piece; . · s ^'··;! wound of the tubular heater bears clampingly, whereby the Rohrh' r / k'Tper with its clamping point of this opposing wall .- <■;.. ■ <_ ■ :! the corresponding wall of the opening. Finally, this type of clamp fastening of the tubular heater is easy again

! ' i;:>; ir, namely by the clamping piece, for example by means of a

.- -kra .il.'Civ-iehers, again Li is bent back to its original position.

^: ■■; A 10 preferred embodiment of the invention is there. ^ Kiemmsiück! •; it de «· el; '? opening for the tubular heater having flange end

724435j27.9.73

plate formed in one piece and from this as in the direction of the opening One-sided cantilevered angle bracket formed, for example punched out. This can reduce the manufacturing costs for the flange end plate lower further, since the production of the opening for the tubular heater and the clamping piece in one operation, i.e. for example by punching once, is possible.

It is also possible to design the clamping piece as a separate part. In this case, the invention provides that the clamping piece at the free end of its leg facing away from the tubular heating element has angled continuation, by means of which the clamping piece can be suspended in a slot of the flange end plate adjacent to the opening for the tubular heater and, in the clamped state, is attached to the corresponding one Supports diaphragm wall. In this case, it is only necessary when producing the flange end plate each for a tubular heating element to assign a slot provided for the opening.

If the final one in certain embodiments of heating devices Flange plate is made so thin that even the low pressure required to transfer the clamping piece into the clamping state could lead to a Verbi ^ connection, it is advantageous to use a clamping piece according to to use a modified embodiment of the invention. It is provided that the clamping piece as a double toggle lever with for Formed level of the flange end plate mirror-image toggle lever halves which are connected to one another by dtn angled extension and on both sides of the flange end plate by bending in the direction of these can be transferred to the clamping position.

The embodiments described above are advantageously suitable for clamping a single tubular heater in

a heater or several tubular heating elements that are relatively distant from one another. According to the invention, however, it is also possible to use the clamping piece for the simultaneous definition of two each aveil an opening in the Provide flange end plate penetrating tubular heating elements. In this case it is designed so that its two legs are relaxed Cover a distance which corresponds approximately to the shortest distance between the two openings and which is connected in the clamped state Support the walls of the tubular heating element facing each other.

According to a further feature of the invention it is provided that the clamping piece can be fixed captively on the flange end plate by means of a screw arranged in the pivot axis of its knee and can be brought into the clamped state by tightening the screw. Here, the configuration may be such that the screw interacts with a ßplatte in the opening of Flanschabschlu internal thread provided or that the the clamping piece and the Flanschabschlußplatte penetrating screw is below de ^r Flanschabschlußplatte associated with a nut. In both cases, the clamping connection is released in a simple manner by turning back the screw. These last two embodiments are therefore particularly suitable for fastening a radiant heater in the reflector.

When the pressure to be exerted on the clamping piece by means of the screw is carried out, it is also possible to use the liquid-tight fastening ■

Stiffening the tubular heater in a heater with less effort £

and to provide in a simpler way. In this case the screw \

according to the invention except for the clamping piece and the flange end plate a mating flange plate arranged at a distance below the flange end plate, between which and the flange end plate a seal is arranged, which when tightening the screw for transferring the

Clamping piece in the clamped state, the tubular heater is liquid-tight closes to the outside. This results in comparison to the known liquid-tight fastening of tubular heating elements the advantage that the clamp fastening for changing the rubber seal is easily detachable i ;; t and that a small-sized rubber seal is also used can.

When using the clamping piece for simultaneous fastening two tubular heating elements, it is also possible according to the invention that the clamping piece on the other side of the flange end plate is the same trained counter clamping piece is assigned. This will be beneficial always be provided when, as already mentioned, the Flange end plate is made so thin for certain reasons that no pressure should be exerted on it in the axial direction.

Finally, it is due to a further embodiment of the invention possible, the manufacturing costs for the flange end plate of a heater to further reduce. This is then achieved when that training according to a further feature of the invention is made such that two tubular heating elements are provided in the flange end plate Pass through the elongated hole and through the clamping pieces, placed one on top of the other in a shell-like manner, to the end walls of the elongated hole are pressable.

Further features, details and advantages of the invention result from c'2r following description of some preferred embodiments based on the drawing. This shows in:

Fig. 1 shows the clamping of a tubular heater by means of a for Flange end plate one-piece clamping pieces in section and

- ·· _r '· ' SI

Fi;: .. 2 in a top view;

Fit ^1,. 3 crosswise the Bffestiru ^: ¹ , 'a Y \' 'hrlieiv.l-.i > v] i < r: .-; n: itt f Ir an angled extension aui '.'eis' in.en V, \ <- w \\ ..tückcs \\ vx \

Fig. 4 by means of a modified from this! iihrui.gslnriM;

Fig '. 5 cross-section the Kiemmbc-festi'.vun;'. equal / '· it.i; ¹ , 7 \\; \ cv tubular heater;

Fig. Γι a modified -Xusführuni ^ sfrir:;! i: n sthnitt;

7 shows the liquid-tight K; emn. :> efest igun.g gleicir / .i-itig z, veier Tubular heater in the Seiienansi ch 'v.nd

Fig. 8 in the Drauisichi.

Fig. 9 cross-sectional view of two mirror images of one another Adhesive pieces for fastening two each with an opening through the tubular heating element and

Fig. 10 for fastening two penetrating a common elongated hole Tubular emitter · .. r.

In the embodiment according to? 1 and 2 penetrates a tubular heater 1 with its end one ^; :: A flange plate 2 of a heater, not shown, for example by means of punching provided opening 3. Each opening 3 de: flange plate 2 provided for a tubular heater 1 is assigned a K ".nms" ück4, which acts as a toggle lever with angled to one another Legs I and 6 is formed. The clamping piece 4 is with

• ·

• ·

of the flange plate 2 in one piece and formed therefrom as a tab protruding on one side in the direction of the opening. They can be produced, for example, during punching, in that, together with the opening 3, two parallel slots and 8 opening tangentially into this opening are produced. The thus formed, limited by the slots 7, 8 and a: v c, exposed in the direction of the opening 3 tab is then bent into the form of a toggle lever shown in FIG to accommodate the tubular heater 1 auiiges sufficient diameter. To fix the tubular heater 1 in the opening 3, in Pfeilrichtur.ga according to FIG. 1, ie in the axial direction, pressure is exerted on the knee 9 connecting the two legs 5, 6 of the clamping piece 4, causing it to move in the direction of the flange end plate 2 moves and the leg 5 of the clamping piece 4, since the other leg 6 is supported on the flange end plate 2, the wall of the tubular heater 1 is clamped. As a result, however, it is also pressed into the wall of the tubular heater 1 opposite the leg 5 of the clamping piece 4 in an approximately radial direction against the corresponding wall of the opening 3. As a result, the tubular heating element 1 is fixed immovably in the opening of the flange end plate 2. To release the clamp fastening, it is only necessary to move the clamping piece 4 axially upwards again against the direction of the arrow a, for example by means of a screwdriver.

In the modified embodiment shown in FIG. 3, a Separate clamping piece 41 is provided, which at the free end of its leg 6 facing away from the tubular heater 1 has an angled extension having. The flange plate 2 is at a distance from the opening 3, which corresponds approximately to the length of the base of the relaxed clamping piece 4, provided with a slot 11 in which the clamping piece 41 with

its extension 10 are hung in such a way that the free end of its leg 5 rests loosely against the wall of the tubular heater 1 in a relaxed state. "Door jamming fastening of the tubular heater in the opening 3 of the flange end plate 2 is only, just as with dux- AuaiÜHiuiigäfoi-iii gCiiiäß Fig. 1, aui the knee 9 of Kl ^ 'n ^ Hirk- 41 in the direction of arrow a pressure exerted, so that the knee moves in the direction of the flange end plate 2, whereby the leg 5 of the clamping piece 41 leans against the wall of the tubular heater 1, while the leg 6 is supported on the corresponding wall of the sleeve II.

In the embodiment according to FIG. 4, the clamping piece 42 is designed as a double toggle lever, the two toggle lever halves of which are formed from the legs 5, G and 5 ', 6' are connected to one another by the extension 10. The two toggle lever halves of the clamping piece 42 are symmetrical about an axis perpendicular to the extension 10. ^{To clamp the tubular heating element 1} introduced into the opening 3 of the flange end plate 1 2, the clamping piece 42 is inserted by inserting it b;. Passing, for example, the legs 5 ', 6' brought through de · ¹ slot 11 in the position shown in FIG. 4 position, in which the two Kniehebelhäliten connecting extension 10 through the slot 11 sets. When pressure is simultaneously exerted in the direction of arrows a and b, the knees 9 and 9 'of the clamping piece 42 are pressed against each other so that the legs 5, 5' clamp the tubular heating element 1, while the extension 10 is supported on the corresponding wall of the slot 11 . This type of clamp fastening is always recommended when the flange end plate is thin-walled and would bend if pressure was only exerted on one side.

In the embodiments described above, the respective clamping piece was used for fastening a single tubular heater or for fastening widely spaced tubular heating element in a flange end plate. In the embodiments described below, this is used

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Clamping piece, on the other hand, for the simultaneous fixing of two tubular heating elements 1, 1 'which, as can be seen from FIG. 5, each penetrate an opening 3 or 3' in the flange end plate 2. The clamp piece 43 is also again in the form of a toggle lever with two through one knee 9 connected legs b, G formed. The two legs 5, 6 of the Clamping piece 43 cover a distance in the relaxed state, the corresponds approximately to the shortest distance between the two openings. In order to transfer the clamping piece 43 into the clamping state, which is shown in broken line in FIG. 1 1, the clamping piece 43 in Direction of arrow a pressure exerted, causing the free ends of the two Legs 5, G displaced against the facing walls of the tubular heating element 1, 1 '; and finally support yourself on this, so that the tubular heating element 1, P are fixed in their openings 3, 3 'by clamping.

In the Ausfünrungsiorm shown in FIG. 6, the clamp is additionally provided with a screw 12 whose threaded bolt passing through the clamping piece 43 in the pivot axis of his knee 9 and an Durehgangsöffn ■■■ ig reaches through in the Flanschabsehlußplatte 2 and υλ a nut screwed 13, which is arranged below the flange plate 2 and firmly connected to it. By screwing the screw 12 into the nut 13, the clamping piece 43 can therefore be transferred into its clamped state, whereas the clamping fastening can easily be loosened again by unscrewing the screw 12 from the nut 13. For this case, the clamping piece 43 is advantageously secured against axial displacement with respect to the threaded bolt of the screw 12.

In the modified embodiment shown in FIG. 7, tubular heating elements 1, 1 'are fastened in a liquid-tight manner in the flange plate 21. This is U-shaped with upwardly projecting legs 14, 14 'and provided with the spaced apart openings 3, V for the tubular heating element 1, 1'. The tubular heating element 1. Γ

- .. ■: i also opening in a counter flange plate 22 which is arranged below -.-: ·! - "^ .. sehaiisehluiiplaUe 21 at a distance from this. Between -.- ■ ':: · -.". you: ¹ record! ^1st 21 and 22 ι-.Λ a tubular heating element 1, 1 'enclosing. ■ ip.ä-Γ "' wtar.g 15 provided, for example from a rubber block ι. ·: -;". · ..- ': . . i; as au: the flange end plate 21 is attached clamping piece 43 .- .; s j-par.nblu-cv.strip and at the free ends of its Schenr k-1 5, ^r ' mii semicircular segments to adapt to the shape of the l ·:>'.. i ■:.! ./'.-.'ri ■ ·> ■ 1, Γ provided. On the mating flange plate 22 em is according to ..be: ¹ . ra.cuKier screw bolt 16 is attached, which, as can be seen from Fig. 7, the Di; - !. tur.g 15, the Fianschabsehlußplatte 21 and the clamping piece 43 throughr sdzi. By tightening the nut IT screwed onto the screw bolt 16, it is now rr.ügli _ ■ :: to veL-bk · ^ ·:} both the clamping piece 43 downwards in this way. there!' the tubular heating elements 1, 1 'in the openings of the flange ab-: -u - !: l.:.";.I <<ite 21 are clamped, as well as the Gegeneiiilansch-

■ I ¹ Ia; ti- 12 i: i Kicl.ICHT to move the flange end plate 21 so that the

; M>:, tu: .u 13 llüssi'-ikeitsdicht is verureß.

.u.s: 'ü!;] - u: i!.', sform according to FIG. 9 is the clamping piece 43 on the

■ 'egg ¹ '. · Ov · Fiansc'nabschlussplatte 2 an identically designed counter ]

;. '·. A ': assigned, this form of training is then again with

: ■. '-. Veiidet. W (? Nn the flange frame framing the tubular heating element 1, 1 '

]: it; e 2 is so thin that it is only in arrow ·. .; U: f the clamping: piece 43 would bend under the applied pressure.

; ■ · '· ■': ■■! ■ The embodiment according to FIG. 10 has the flange end plate. ·] ■ '■'. ·. : · ':.' ■ each one of a Rohrl ^ -izkörper has its own opening, but is ::.;: U :: v-: n Laiigloch 18 provided, into which the two legs 1, 1 'one ^: '-: i ::.:;. trained tubular heating element are used. In the free ^: ·; : ·: ·. :> s I..mg! ) ^r : hes 18 between the facing walls of the

Pl

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B

Tubular heater legs 1, 1 'are the muse gel-like "put on top of each other Clamping pieces 43, 44 arranged, which in the manner described above by exerting pressure in the direction of arrows a and b in the clamped state can be transferred, injdem the mutually opposite Walls of the tubular heater legs 1, 1 'are pressed against the end walls of the elongated hole 18.

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Claims (1)

Patent attorney Dipl.-Phys. Gerhard Liedl 8 Munich 22 Steinsdorfstrasse 21-22 Tel. 298462 Protection claims 1. Heater with tubular heaters, in particular domestic stoves with an oven, grill, infrared heater or the like., With each tubular heater with its end an opening in a flange plate or other holder of the heater or in the heater self-interspersed, characterized in that the tubular heating element (1) is fixed in the heater by means of a clamping piece (4), which consists of one from the plane of the flange end plate (2) at least in one place and in at least one direction knee-knee-shaped bent sheet metal part arranged next to the opening (3) and d ' ■ in the clamped state with the one clamping piece leg (δ) the The tubular heating element presses in an approximately radial direction against the opening wall opposite this leg and with the other leg of the clamp piece (6) is supported on a stationary point. 2. Heater according to claim 1 _? characterized in that the clamping piece (4) is formed in one piece with the flange end plate (2) having the opening (3) for the tubular heater (1) and is shaped, for example punched, from this as an angle bracket protruding on one side in the direction of the opening. 3. Heater according to claim 1, characterized in that the clamping piece (41, 42, 43) is designed as a separate part. 4. Heater according to claim 3, characterized in that the clamping piece (41) at the free end of its the tubular heater (1) ⁵⁸⁵¹ 724435527.1.73 remote leg (6) has an angled extension (10) ..of shows, by means of which it is suspended in a slot (11) of the flange end plate (2) adjacent to the opening (3) for the tubular heater is and is supported in the clamped state on the corresponding diaphragm wall. 5. Heater according to claim 4, characterized in that the clamping piece as a double toggle lever (42) with the flange end plate level (2) mirror-inverted Kmeebelhälften is formed, which are connected to one another by the angled extension (10) and can be converted into the clamped state on both sides of the flange end plate by bending in the direction of this. 6. Heater according to claim 3, characterized in that the g <indicates that the Clamping piece (43) for the simultaneous fixing of two tubular heating elements each penetrating an opening (3, 3 ') in the flange end plate (2) (1,1 ') is provided and designed so that its two legs (5, 6) are approximately the shortest in the relaxed state Distance between the two openings cover the corresponding distance and in the clamped state on the walls facing each other support the tubular heating element. 7. A heater according to claim 4 or 6, characterized in that the clamping piece (43) by means of a screw (12) arranged in the pivot axis of its knee (9) on the flange end plate (2) captively fixed "iH -inruh Anaiohon rior fohraubc in the ICLimil ■ asd n is. 8. Heater according to claim 7, characterized in that the screw (16) except for the clamping piece (43) and the Flanachabschlussplacte (21) another counterpart arranged at a distance below this 72U35527.9.73 ■■ - ''"η<■ · ί." · '. /.ν,-!■ "Iu- 'ir; - υπό -Or flange end plate; ■ ir · ·>; Ί. ·;: ι: ,, Ί"ΐ'Ip-; :: ■ ic Γ),;!; · />,n/.iehen rie.i screw
ι τ ,! "■" (■■ - ■ c, i "! hm-.,. ':!;i'-kc.'S ι ¹ (i' F! '- inmStnnd die Hohr- (1 i' ) ΓJ "iiii. ^ Fiif iii n.-ic!] Πιιί ^ Ί 'nriscpiisses. J. Ι ί'M / .; · ... Ί \. 'Ί after / ^v . . '. "1'". Ch ''. _(i;: 'iurch .reliennzeiciinet that the K ¹ . ■ --ii.stiK. k [AW) niif f'oi nnrlcren Ri -: - (ic: · Flansel-ibschiußplntte (2) e ': i!'. 1 ( ^ι ί '· Μ.: ^; < ^{: Ι} -ncic.'tc. s Ci "!; i. ■;! -. j crr.nisUifk \" ι · '\) is assigned. 10. Il · ·::.!; Οι \ '· η; h Aus> ruc! '. 9. cl:; dur ^! I ;; ekennzeichuet that in each case /.woi I ^ olir'ieizk «.'.-. τ (1, ^Γ λ a L forth in the Fiansehabschiußplatte (2), eseli ie: - La -) '.. "cl · (lo) duri';.: RSOT n / '' and between them
nuisclu arIi ;. ¹ , ü ^ ereiiiiHH'er-osei / .t ari ^ eordi'ictei: Jemmstücke (43,44) π ρ riW 'S! ι τη \ - · .: ": f: rif -., ->'. T_.ri iv! t ifiu ·' ¹ nivi -.;, " ick! «Inrj 72 ^ 635527,3.73