Pipe coupling for connecting two pipe ends or pipe clamp for sealing a defective pipe

Abstract

A pipe coupling or a pipe clamp has an outer clamp band with an outer longitudinal slot, an inner clamp band with an inner longitudinal slot and a tensioning mechanism arranged on the outer clamp band. The inner longitudinal slot is offset in relation to the outer longitudinal slot. A separate flat spanning element is provided on the inner clamp band in order to span the inner longitudinal slot. The spanning element extends from one side of the inner longitudinal slot towards the other side of said longitudinal slot.

Claims

1. A pipe coupling for connecting two pipe ends or a pipe clamp for sealing a defective pipe comprising: an outer clamp band which includes at least two outer clamp band parts, and which has at least two outer longitudinal slots, each with mutually opposite outer longitudinal slot sides, wherein one of the at least two outer longitudinal slots is formed between respective ends of one of the at least two outer clamp band parts, and another of the at least two outer longitudinal slots is formed between respective ends of another of the at least two outer clamp band parts, an inner clamp band which includes at least two inner clamp band parts, and which has at least two inner longitudinal slots, each with mutually opposite inner longitudinal slot sides, wherein one of the at least two inner longitudinal slots is formed between respective ends of one of the at least two inner clamp band parts, and another of the at least two inner longitudinal slots is formed between respective ends of another of the at least two inner clamp band parts, and at least one tensioning mechanism for reducing an inner diameter defined by the outer clamp band and the inner clamp band, wherein at least one of the at least two inner longitudinal slots is arranged offset with respect to the at least two outer longitudinal slots, and wherein at least one of the at least two inner clamp band parts has a total arc length defined by the inner longitudinal slot sides of said one of the at least two inner clamp band parts, and at least one of the at least two outer band parts has a total arc length defined by the outer longitudinal slots sides of said one of the at least two outer clamp band parts, wherein the total arc length of said one of the at least two inner clamp band parts is greater than the total arc length of said one outer of the at least two outer clamp band parts.

2. The pipe coupling or pipe clamp according to claim 1, wherein at least one inner clamp band part is fixed on an outer clamp band part.

3. The pipe coupling or pipe clamp according to claim 1, wherein at least one separate flat spanning element is provided on the inner clamp band for spanning at least one of the at least two inner longitudinal slots, wherein the at least one separate flat spanning element extends over a respective one of the at least two inner longitudinal slots.

4. The pipe coupling or pipe clamp according to claim 1, wherein at least one flat spanning element is provided for spanning the at least two inner longitudinal slots.

5. The pipe coupling or pipe clamp according to claim 4, wherein the at least one flat spanning element includes two separate flat spanning elements , each of which is provided at end regions of a respective one of the at least two inner clamp band parts.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) In the figures:

(2) FIG. 1 shows an embodiment of a pipe coupling or pipe clamp according to the first approach of the invention in a perspective view,

(3) FIG. 2 shows a section through the inner slot of the embodiment according to FIG. 1,

(4) FIG. 3 shows an embodiment of a pipe coupling or pipe clamp according to the second approach of the invention in a perspective view,

(5) FIG. 4 shows a first outer clamp part of the embodiment according to FIG. 3 with an arranged first inner clamp part in a perspective view,

(6) FIG. 5 shows a second outer clamp part of the embodiment according to FIG. 3 with an arranged second inner clamp part in a perspective view, and

(7) FIG. 6 shows a perspective view of the embodiment according to FIG. 3.

DETAILED DESCRIPTION

(8) FIGS. 1 and 2 show a pipe coupling 11 for connecting two pipe ends of the pipes 6 and 7. The pipes 6 and 7 define a pipe longitudinal axis 8. The pipe coupling 11 can also serve as a pipe clamp for sealing a defective pipe.

(9) The pipe coupling 11 has an outer clamp band 12 whose free end regions are each formed into lugs 13 or 15 and whose ends 14 or 16 are fixed on the outside of the outer clamp band 12. The mutually opposite lugs 13 and 15 have mutually opposite outer longitudinal slot sides 17 and 18 between which an outer longitudinal slot 19 is formed. The outer longitudinal slot 19 extends parallel to the pipe longitudinal axis 8.

(10) The pipe coupling 11 further has an inner clamp band 26 with mutually opposite inner longitudinal slot sides 27 and 28 between which an inner longitudinal slot 29 is formed. The inner longitudinal slot 29 is arranged offset to the outer longitudinal slot 19, in this example offset by 180. The inner longitudinal slot 29 extends parallel to the pipe longitudinal axis 8. The inner clamp band 26 is fixed on the outer clamp band 12. The inner clamp band 26 is for example fixed by at least one weld point on the outer clamp band 12.

(11) One clamping bolt 22 and 23 is provided in each of the lugs 13 and 15 of the outer clamp band 12, through which clamping screws 24 pass, wherein at least in one of the clamping bolts 22 or 23 an internal thread section is provided in which an external thread section of the clamping screws 24 can engage. The clamping bolts 22 and 23 and the clamping screws 24 together form the tensioning mechanism 21 for reducing the inner diameter of the clamp bands 12 and 26 arranged on the outer clamp band.

(12) Furthermore, a separate flat spanning element 31 for spanning the inner longitudinal slot 29 is provided in the inner clamp band 26. The flat spanning element 31 extends from the one inner longitudinal slot side 27 in the direction of the other inner longitudinal slot side 28 and beyond in each case. The flat spanning element 31 is fixed on one side, here at the spanning element end 32, for example with a plurality of weld points 33 on the inner clamp band 26 on the inner side thereof.

(13) In the pipe coupling 41 shown in FIGS. 3 to 6, the outer clamp band 42 is configured in two parts and thus has an outer clamp band part 43 and 48. The free end regions of the outer clamp band part 43 are each formed into lugs 44 or 46 wherein the ends thereof are fixed on the outside of the outer clamp band part 43, e.g. via weld points or rivets or screws. The free end regions of the outer clamp band part 48 are also each formed into lugs 49 or 51, wherein the ends thereof are fixed on the outside of the outer clamp band part 48, e.g. via weld points or rivets or screws.

(14) The mutually opposite lugs 44 and 49 have mutually opposite outer longitudinal slot sides 45 and 50 between which the outer longitudinal slot 56 is formed.

(15) The mutually opposite lugs 46 and 51 have mutually opposite outer longitudinal slot sides 47 and 52 between which the outer longitudinal slot 58 is formed.

(16) The inner clamp band 61 of the pipe coupling 41 is configured in two parts and thus has an inner clamp part 62 and an inner clamp part 67.

(17) The inner clamp part 62 is fixed on the outer clamp part 48, e.g. via two weld points 65 (see FIG. 4). The inner clamp part 62 further has an arc length defined by inner longitudinal slot sides 63 and 64 which is shorter than the arc length of the outer clamp part 48. In the present example the inner longitudinal slot sides 63 and 64 of the inner clamp part 62 are spaced apart from the outer longitudinal slot sides 50 and 52 of the outer clamp part 48 by approximately the same distance.

(18) The inner clamp part 67 is fixed on the outer clamp part 43, e.g. via two weld points 70 (see FIG. 5). The inner clamp part 67 further has an arc length defined by inner longitudinal slot sides 68 and 69 which is longer than the arc length of the outer clamp part 43. In the present example the inner longitudinal slot sides 68 and 69 of the inner clamp part 67 project beyond the outer longitudinal slot sides 45 and 47 of the outer clamp part 43 by approximately the same distance.

(19) In the assembled state of the pipe coupling 41 (see FIGS. 3 and 6) an inner longitudinal slot 76 is formed between the mutually opposite inner longitudinal slot sides 63 and 68. An inner longitudinal slot 78 is formed between the mutually opposite inner longitudinal slot sides 64 and 69. The inner longitudinal slot 76 is arranged offset with respect to the outer longitudinal slot 56 and the inner longitudinal slot 78 is arranged offset with respect to the outer longitudinal slot 58.

(20) At the outer longitudinal slot 56 a first tensioning mechanism 81 is provided and at the outer longitudinal slot 58 a second tensioning mechanism 83 is provided for reducing the inner diameter of the pipe coupling 41. Instead of two tensioning mechanisms, it would also be feasible to provide only one of the same and configure the other merely as a hinged connection.

(21) At the free end regions of the inner clamp part 67, a separate flat spanning element 86 and 88 is provided in each case on the inside which extends over the inner longitudinal slots 76 or 78 in the combined and in the braced state of the pipe coupling 41. The flat spanning elements 86 and 88 are each fixed positively and/or non-positively to the inner clamp part 67, here by means of weld points 87 or 89. Alternatively the flat spanning elements 86 and 88 can also be fixed with rivets or screws to the clamp part 67.

REFERENCE LIST

(22) 6 Pipe

(23) 7 Pipe

(24) 8 Pipe longitudinal axis

(25) 11 Pipe coupling

(26) 12 Outer clamp band

(27) 13 Lug

(28) 14 End

(29) 15 Lug

(30) 16 End

(31) 17 Outer longitudinal slot side

(32) 18 Outer longitudinal slot side

(33) 19 Outer longitudinal slot

(34) 21 Tensioning mechanism

(35) 22 Bolt

(36) 23 Bolt

(37) 24 Clamping screw

(38) 25 Inner clamp band

(39) 27 Inner longitudinal slot side

(40) 28 Inner longitudinal slot side

(41) 29 Inner longitudinal slot

(42) 31 Spanning element

(43) 32 Spanning element end

(44) 33 Weld point

(45) 41 Pipe coupling

(46) 42 Outer clamp band

(47) 43 Outer clamp band part

(48) 44 Lug of 43

(49) 45 Outer longitudinal slot side

(50) 46 Lug of 43

(51) 47 Outer longitudinal slot side

(52) 48 Outer clamp part

(53) 49 Lug of 48

(54) 50 Outer longitudinal slot side

(55) 51 Lug of 48

(56) 52 Outer longitudinal slot side

(57) 56 Outer longitudinal slot

(58) 58 Outer longitudinal slot

(59) 61 Inner clamp band

(60) 62 Inner clamp band part

(61) 63 Inner longitudinal slot side

(62) 64 Inner longitudinal slot side

(63) 65 Weld point

(64) 67 Inner clamp band part

(65) 68 Inner longitudinal slot side

(66) 69 Inner longitudinal slot side

(67) 70 Weld point

(68) 86 Inner longitudinal slot

(69) 78 Inner longitudinal slot

(70) 82 Tensioning mechanism

(71) 83 Tensioning mechanism

(72) 86 Spanning element

(73) 87 Weld point

(74) 88 Spanning element

(75) 89 Weld point