JP2008215622A - Tubular coupler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tubular coupler capable preventing cracking from occurring in a connection section at the end of a tightening band, eventually the tubular coupler from being disconnected, and the gap between the adjacent ends of two connected tubes from being unsealed. <P>SOLUTION: This tubular coupler for connecting the adjacent ends of two pipes comprises an annular sleeve 11 made of an elastic material; and a tightening device having at least one tightening band 12, 13 and at least one tightening screw 14 and tightening a sleeve. The tightening bands or each tightening band 12, 13 has an end 15 bent in a loop shape. Each end 15 bent in a loop shape of the tightening bands or each tightening band has a winding section 16 for winding a tightening bolt 18 and the connection section in which the end 15 bent in a loop shape through the connection section 17 is fixedly connected to the outside 19 of each tightening band 12, 13 therethrough. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tubular connector according to the preamble of claim 1 or the preamble of claim 7.

  From Patent Document 1, a tubular connection for connecting the ends of two pipes having a sleeve made of a rubber elastic material, which is used for sealing a gap between the ends of the two pipes The vessel is known. According to U.S. Pat. No. 6,057,059, this sleeve is arranged inside the shell in an axial ring chamber and can be tightened with a tensioning device. In this prior art, the tensioning device includes two tensioning bands, with each tensioning band and tensioning screw cooperating. As described above, according to Patent Document 1, the ends of both of the tightening bands are bent in a loop shape, and one end of each of the tightening bands has a tightening bolt formed as a round bolt. surround. A tightening screw that cooperates with each tightening band extends through a round bolt that surrounds the looped end of each tightening band.

The end of the tension band that is bent into a loop is divided into two sections, that is, a winding section and a connecting section. The winding section is used for winding round bolts and bent into a loop. The formed end portion is firmly connected to the outside of the tension band in the connection section. According to Patent Document 1, the connecting section of the end portion of the tension band bent in a loop shape is fixedly connected to the outside of each of the tension bands by a welding spot. Is bent at an angle.
German utility model 8916031

  The tubular coupler known from this state of the art has the disadvantage that cracking can occur in the connecting section of the looped end of the tightening band due to dynamic loading. This can eventually cause the tubular connector to come off and the gap between adjacent ends of the two connected tubes can no longer be sealed. Starting from this point, the problem underlying the present invention is to provide a new type of tubular coupler.

  This problem is solved according to the first aspect of the invention by the tubular coupler according to claim 1. According to it, the transition area between the winding section and the connecting section of each end, which contacts the outside of each of the tension bands or each tension band, runs tangentially to the outside of each tension band, The tightening band or a connection section of each end of each tightening band, to which the tightening band is fixedly coupled to the outside of each tightening band, has a transition region as viewed from each tightening bolt. The end portions of the tension band or each tension band bent in a loop shape are tangentially supported outside the tension band so as to be located rearward.

  According to a second aspect of the invention, this problem is solved by a tubular coupler according to claim 7. According to this, the sleeve is surrounded by a molded shell for each section, and this molded shell carries at least one clamping element of the clamping device, and the clamping device clamps the sleeve via the molded shell. Determine.

  Both aspects of the present invention have in common that the fabricated tubular coupler is less susceptible to dynamic loading and has a longer service life.

  According to the first aspect of the present invention, a tightening force for tightening the sleeve is introduced through at least one tightening band, and the tightening band or each tightening band moves the sleeve into each section. The risk of crack formation due to dynamic loads is clearly reduced at the ends bent directly into the loop and subject to the embodiment of the tightening band according to the invention.

  According to a second aspect of the invention, the tensioning of the sleeve is carried out via at least one tensioning element of the tensioning device which engages the molded housing, which is implemented as a tensioning belt or a tensioning rope. Is done. The molded shell that directly surrounds the sleeve for each section does not generate a tightening force.

  Preferred variants of the invention are evident from the dependent claims and the following specification. The exemplary embodiments of the present invention will be described in more detail with reference to the drawings, but are not limited thereto.

  1 and 2 show a first exemplary embodiment of a tubular connector 10 according to the present invention for connecting adjacent ends of two tubes (not shown). The tubular coupler 10 of the exemplary embodiment in FIGS. 1 and 2 has an annular sleeve 11 that is utilized to seal the gap between adjacent ends of the tubes that are coupled together. The sleeve 11 is formed from an elastic material, preferably a rubber elastic material.

  The sleeve 11 of the tubular connector 10 can be tightened using a tensioning device, and in the exemplary embodiment shown in FIGS. 1 and 2, the tensioning device comprises two tensioning bands 12, 13 and four. The tightening screw 14 is formed. Each of the tension bands 12, 13 extends approximately half of the circumference of the sleeve 11, and opposite ends of the tension bands 12, 13 are connected via a tension screw 14. The tightening bands 12, 13 are directly adjacent to the sleeve 11, i.e. radially outward and laterally. Instead of both tension bands 12, 13 each extending approximately half the circumference of the sleeve 11, only one tension band may be used, in which case this tension band extends substantially over the entire circumference of the sleeve 11. It is pointed out that the opposite ends of the tensioning band are connected to each other, preferably via two tensioning screws 14.

  In the region of each end 15 of each tightening band 12, 13, the tightening band is bent in a loop shape, and each end 15 bent in a loop shape in the tightening bands 12, 13 is respectively One winding section 16 and connection section 17 are provided.

  A winding section 16 of each end portion 15 bent in a loop shape in each of the tightening bands 12 and 13 winds a tightening bolt 18 extending substantially in the axial direction of the tubular connector 10. In order to tighten the sleeve 11 of the tubular connector 10 by engaging the tightening screw 14 at the end 15 of the tightening band 12, 13 facing the tightening bolt 18, and tightening the tightening screw 14. The interval between the end portions 15 facing each other in the tension bands 12 and 13 can be reduced.

  The region of the sleeve 11 that extends between the opposing ends 15 of the tension bands 12 and 13 and is not covered by the tension bands 12 and 13 is covered radially outside by a cover element (not shown). The end portions 15 of the tension bands 12, 13 are moved through the cover element when tightening the tension screws 14. A cover element (not shown) prevents the sleeve 11 from escaping radially outward between the opposing ends 15 of the tightening bands 12, 13 when tightened.

  In the region of the connecting section 17 of each end portion 15 bent in a loop shape in the tightening bands 12 and 13, the end portion 15 bent in a loop shape is connected and fixed to the outer side 19 of each tightening band 12 and 13. Yes.

  According to the first embodiment of the present invention, the end portions 15 bent in a loop shape in the tension bands 12 and 13 are arranged between the winding section 16 and the connection section 17 of each end section 15. The transition region 20 of each end 15 is carried tangentially on the outer side 19 of each of the tension bands 12, 13 such that it contacts the outer side 19 of each of the tension bands 12, 13 in a tangential direction. The winding section 16 preferably transitions to the connecting section 17 of each end 15 without making an angle.

  The connecting sections 17 of the end portions 15 of the tightening bands 12, 13 are connected to the outer sides 19 of the tightening bands 12, 13 via the end portions 15 bent in a loop shape, respectively. 18 is located behind the transition region 20 of each bent end 15 as seen from each. Thereby, the introduction of radial force into the connecting section 17 is prevented.

  In the exemplary embodiment of FIGS. 1 and 2, the connecting section 17 of each end 15 bent into a loop is fixedly connected to the outer side 19 of the tension bands 12, 13 by welding, respectively, in FIG. A welded seam 21 indicated by a dotted line extends substantially in the circumferential direction of the tubular coupler 10. At that time, the connecting sections 17 of the end portions 15 bent in a loop form a plurality of joint plate portions 22 having a trapezoidal outline as shown in FIG. The edge 23 of the trapezoidal contoured seam plate part 22 forms an angle with the circumferential direction of the tubular connector 10 up to 20 °, in particular up to 15 °. As a result, the wedge formed between the edge 23 and the adjacent seam plate 22 has an opening angle of up to 40 °, in particular up to 30 °. The weld seam 21 runs substantially parallel to the edge 23 of the seam plate and thus in the direction of the edge 23. As shown in FIG. 2, the narrow portion 24 between the adjacent joint plate portions 22 preferably has an arcuate contour, and the weld seam 21 does not extend into the narrow portion 24.

  According to the above-described embodiment of the connecting section 17 of the end portion 15 bent in a loop shape in the tension bands 12 and 13, and by the welding seam 21 running as described above in the region of the connecting section 17, the welding seam 21 is substantially In particular, it is achieved that they are not exposed to shear or tensile stresses. Furthermore, the narrow portion 24 between the adjacent seam plate portions 22 reduces the load at the weld seam 21, that is, at the start end portion of the weld seam that is particularly easily damaged.

  3 and 4 illustrate another exemplary embodiment of a tubular coupler 25 according to the present invention, the tubular coupler 25 of FIGS. 3 and 4 being similar to the tubular coupler 10 of FIGS. Are distinguished only by the embodiment of the connecting section 17 of the looped end 15 of the tightening bands 12, 13, and therefore the same reference numerals are used for the same components to avoid unnecessary repetition Is done. In the following, only the details distinguishing the exemplary embodiment of FIGS. 3 and 4 from the exemplary embodiment of FIGS. 1 and 2 will be described in detail.

  In the exemplary embodiment of FIGS. 3 and 4, the connecting section 17 of each end 15 that is bent in a loop in the tension bands 12, 13 is secured to the outer side 19 of the tension bands 12, 13, respectively, by a clasp. It is connected. That is, according to FIG. 4, the connecting section 17 is connected to the outer side 19 of the tension band 12 via a plurality of rods 26 that are combined into a plurality of rows that run vertically. When the connection section 17 is clamped to the outer side 19 of the respective tightening bands 12 and 13, heat is not taken into the material, so that the material is more resistant to dynamic loads and the risk of crack formation is welded. Compared to Therefore, also in the exemplary embodiment of FIGS. 3 and 4, the tightening force for tightening the sleeve 11 is introduced via the tightening bands 12, 13 directly adjacent to the sleeve 11.

  FIGS. 5 and 6 show an exemplary embodiment of a tubular connector 27 according to the invention according to a second embodiment of the invention, which is also adjacent to two tubes. Used to connect the ends, the sleeve of the tubular connector 27 seals the gap between adjacent ends of the tubes that are connected together. This sleeve is again formed from an elastic material, preferably a rubber elastic material. The sleeve is not shown in FIGS. 5 and 6 and a cover element 28 is shown which prevents the sleeve from escaping radially outward during its tightening.

  As shown in FIGS. 5 and 6, the sleeve to be tightened is surrounded by the molded housing 29 for each section, and the tightening element 30 of the tightening device is carried radially outward by the molded housing 29. The tensioning element 30 is formed as a tensioning belt as shown in FIGS. 5 and 6, and the end 31 of the tensioning belt 30 forms a loop that surrounds one tensioning bolt 32. The tightening bolt 32 extends substantially in the axial direction of the tubular connector 27. A tightening screw 33 extending substantially in the circumferential direction of the tubular coupler 27 is engaged with the tightening bolt 32.

  The tensioning belt 30 is preferably formed from a polymer compound, in particular polyester. Due to the high breaking elongation of such a polymer compound, the tension belt 30 becomes less susceptible to dynamic loads. The tensioning belt 30 absorbs all circumferential forces used for the tensioning of the sleeve, so that the molded housing 29 of the tubular connector 27 immediately adjacent to the sleeve does not have to accept the tensioning force. .

  FIGS. 7 and 8 show a second exemplary embodiment of a tubular coupler 34 according to the present invention in a second embodiment of the present invention, the exemplary embodiment of FIGS. A distinction is made from the exemplary embodiment of FIGS. 5 and 6 only by the use of two tensioning ropes 35 instead of tensioning belts as tensioning elements of the tensioning device. For other details, the exemplary embodiment of FIGS. 7 and 8 is consistent with the exemplary embodiment of FIGS. 5 and 6, and therefore the same reference numerals are used for the same components to avoid unnecessary repetition. ing.

  Also in the exemplary embodiment of FIGS. 7 and 8, the circumferential force required for tightening of the sleeve 28 is completely absorbed by the tightening rope 35 so that the molded housing 29 is tightened. There is no need to transmit or absorb. The tensioning rope 35 is preferably formed as a steel rope.

  When using the tensioning rope according to FIGS. 7 and 8, the resistance to mechanical damage is somewhat better than when using the tensioning belts according to FIGS. 5 and 6, but the production costs use the tensioning rope. Higher than if you want to. When the tension belt is used, the introduction of force through the tension bolt 32 is better than when the tension rope is used.

1 is a side view of a first exemplary embodiment of a tubular coupler according to the present invention according to the first aspect of the present invention; FIG. FIG. 2 is a partial perspective view of the tubular coupler according to FIG. 1. FIG. 3 is a side view of a second exemplary embodiment of a tubular coupler according to the present invention according to the first aspect of the present invention. FIG. 4 is a partial perspective view of the tubular coupler according to FIG. 3. FIG. 3 is a side view of a first exemplary embodiment of a tubular coupler according to the present invention according to a second aspect of the present invention. FIG. 6 is a partial perspective view of the tubular coupler according to FIG. 5. FIG. 6 is a side view of a second exemplary embodiment of a tubular coupler according to the present invention according to the second aspect of the present invention. FIG. 8 is a partial perspective view of the tubular coupler according to FIG. 7.

Explanation of symbols

10, 25, 27, 34 Tubular coupler 11 Sleeve 12, 13 Tightening band 14, 33 Tightening screw 15 End 16 Winding section 17 Connection section 18, 32 Tightening bolt 19 Outer 20 Transition area 21 Weld seam 22 Seam Plate portion 23 Edge portion 24 Narrow portion 26 鋲 28 Cover element 29 Molded housing 30 Tightening element / tightening belt 31 End portion 35 Tightening element / tightening rope

Claims (11)

An annular sleeve made of an elastic material, used for sealing a gap between the ends of the tube, and a tensioning means for clamping said sleeve with at least one clamping band and at least one clamping screw A tubular connector for connecting adjacent ends in two tubes, comprising:
The tightening band or each tightening band has an end portion bent in a loop shape, and each end portion bent in a loop shape in the tightening band or each tightening band includes the tightening bolt. A tubular section having a winding section, and a connection section through which the end bent in a loop shape is fixedly connected to the outside of each tightening band,
A transition region (20) between the winding section (16) and the connecting section (17) of each end contacting the outer side (19) of each of the tightening bands (12, 13) includes the respective tightening bands. Run tangentially outside the band (19),
The connection of the tightening band or the end (15) of each tightening band (12, 13) through which the tightening band is fixedly connected to the outside (19) of each tightening band The section (17) is bent in a loop shape in the tightening band or the tightening bands (12, 13) so that the section (17) is located behind the transition region when viewed from the tightening bolts (18). Each end (15) is carried in a tangential direction on the outside (19) of each tightening band (12, 13). The connection section (17) at each end of the tension band or each tension band (12, 13) is fixedly connected to the outside (19) of the respective tension band by welding,
Tubular connector according to claim 1, characterized in that the weld seam (21) extends substantially circumferentially. A connecting section (17) at each end of the tension band or each tension band (12, 13) forms a plurality of seam plates (22),
The edge (23) of the seam plate part (22) forms an angle of up to 20 °, in particular up to 15 ° in the circumferential direction,
Tubular coupler according to claim 2, characterized in that the weld seam proceeds in the direction of the edge (23).   4. The tubular connector according to claim 3, wherein the narrow portion (24) between the adjacent seam plate portions (22) has an arcuate contour and is not welded.   A connecting section (17) of each end (15) of the tightening band or each of the tightening bands is fixedly connected to the outside (19) of the tightening band by fastening. The tubular coupler according to claim 1.   6. Tubular connection according to any one of claims 1 to 5, characterized in that the winding section (16) transitions to the connection section (17) of each end (15) without an angle. vessel. An annular sleeve made of an elastic material, used for sealing a gap between the ends of a tube, and a tensioning device for tightening the sleeve with at least one tensioning screw. A tubular connector for connecting adjacent ends of a tube of
The sleeve (28) is surrounded by a molded housing (29) for each section,
At least one tensioning element (30, 35) of the tensioning device is carried by the molded housing (29);
The tubular connector, wherein the tightening device tightens the sleeve (28) through the molded housing (29). The tensioning element of the tensioning device or each tensioning element (30) is formed as a tensioning belt;
The tension belt or each tension belt (30) is carried outside the molded shell (29),
The end of the tension belt or each tension belt (30) forms a loop,
8. A tubular connector according to claim 7, characterized in that the loops or each tightening screw (33) extends therethrough and each surrounds one tightening bolt (32).   9. A tubular coupler according to claim 8, wherein the tensioning belt or each tensioning belt (30) is formed of a polymer compound. The tensioning element of the tensioning device or each tensioning element (35) is formed as a tensioning rope;
The tensioning rope or each tensioning rope (35) is carried outside the molded housing (29),
The end of the tensioning rope or each tensioning rope (35) forms a loop;
8. The tubular coupler according to claim 7, wherein the loop surrounds one tightening bolt (32) each of which tightens the tightening screw or each tightening screw (33) extends therethrough. .   11. A tubular coupler according to claim 10, wherein the tensioning rope or each tensioning rope (35) is made of steel.

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