WO2007036655A1 - Arrangement for positioning a conduit relative to a pipe - Google Patents

Abstract

The invention concerns an arrangement for positioning a conduit (1) relative to a pipe (2) of axis (D), the conduit (1) being rigid and bent in an L-shape and comprising two branches (11, 12): a first branch (11) radially positioned on the pipe (2) and one end of which is fixed by fixing means (15) on the pipe (2); a second branch (12) substantially parallel to the axis (D) of the pipe (2) characterized in that it comprises a member (4) for positioning the conduit (1) relative to the pipe (2) and in that the positioning member (4) comprises at least two fixing lugs: one fixing lug (41) on the pipe (2), one lug (42) for positioning the conduit (1) relative to the pipe (2) which co-operates with the second branch (12) of the conduit.

Description

 ARRANGEMENT FOR POSITIONING A PIPE IN RELATION TO A PIPE

The invention relates to an arrangement for positioning a pipe with respect to a pipe, the pipe being rigid and L-shaped and having two branches: a first radial positioning branch on the pipe and one end of which is fixed by means of fixing on the pipe, - a second branch substantially parallel to the longitudinal axis of the pipe.

The invention relates, in particular, to a positioning arrangement of a pressure tapping pipe with respect to an exhaust line. To ensure the operation of a particulate filter in an exhaust line, exhaust gas flow control means flowing in the particulate filter are used. The operation of the control means is controlled by control means receiving, as input, information relating to the operating conditions of the filter delivered by sensors located in the line, one of the sensors being constituted by a differential pressure sensor between a point located upstream of the particulate filter and a point downstream of the particulate filter. In practice, the pressure is taken by means of rigid stainless steel long bent pipes fixed by lateral extensions of support on the particulate filter.

Each pipe is inclined at an angle of at least 3 ° to the horizontal axis defined by the exhaust line so as to avoid condensas and their possible freezing. Currently, to ensure the positioning of these pipes, a template is applied manually during assembly pipes on the line. Mounting a template requires an additional step in the process which is expensive in an industrial process. In addition, this assembly is dependent on geometric dispersions due to assembly tolerances which does not ensure a reliable and reproducible positioning.

In order to overcome these disadvantages, the object of the invention is to ensure the positioning of a pressure line with respect to the exhaust line.

More generally, the invention aims to ensure the positioning of a rigid pipe relative to a pipe.

For this purpose, the invention proposes the positioning arrangement of a pipe with respect to a pipe comprises a pipe positioning member with respect to the pipe and in that the positioning member comprises at least two tabs: a bracket on the pipe,

- A tab for positioning the pipe relative to the pipe which cooperates with the second branch of the pipe.

According to other features of the invention, the positioning member is made in one piece. According to other features of the invention, the positioning member is an L-folded sheet.

According to other features of the invention, the positioning tab comprises a housing dimensioned such that the second branch of the pipe bears on a portion of the housing.

According to other characteristics of the invention, the positioning tab carries an elastic clamp in which is received the second branch of the pipe.

According to other features of the invention, the positioning tab comprises:

a fixed lower part connected to the fixing lug, a removable upper part which cooperates with the second branch of the pipe and

- Means for positioning the upper part relative to the lower part. According to other features of the invention, the upper part is a jumper whose end of the two arms is nested in a complementary part of the lower part.

According to other features of the invention, the upper part is removable. According to other features of the invention, the pipe is a pressure tapping pipe and in that the pipe is an exhaust line.

According to other features of the invention, the fixing means comprise: a support fixed on the pipe;

- A screw fitting mounted on the end of the first branch and fixed on the support.

According to other features of the invention, an exhaust line comprises a pressure tap line positioned with respect to the line by a positioning arrangement.

Other features and advantages of the invention will appear on reading the description of exemplary embodiments with reference to the appended figures. Figure 1 shows a perspective view of an arrangement of a pressure tapping pipe with respect to an exhaust line according to a first embodiment of the invention.

FIG. 2 is a perspective view of an arrangement of a pressure tapping pipe with respect to a exhaust line according to a second embodiment of the invention.

Fig. 3 is a perspective view of an arrangement of a pressure tapping pipe with respect to an exhaust line according to a third embodiment of the invention.

Identical or similar elements are designated by the same reference numerals.

As shown in FIGS. 1 to 3, a pipe 1 for taking pressure is tubular of circular section, bent in L and rigid. This pipe 1 is positioned relative to a pipe 2, called the exhaust line, by means of a positioning member 4. This pipe 2 is tubular of circular section and of axis D. The pipe 1 comprises a first branch 11 and a second branch 12. These two branches form an angle substantially greater than 90 ° so that the pipe allows a flow of fluid.

The positioning member 4 comprises two tabs: a fixing tab 41 and a positioning tab 42.

The fastening tab 41 is arranged on the pipe 2. The positioning tab 42 cooperates with the second branch 12.

So as both to maintain the positioning member 4 on the line 2 and the line 1 on the line 2 and to position the positioning member 4 relative to the line 2 and the pipe 1 relative to the line 2 fastening means 15 are used. As shown in FIGS. 1 to 3, the fastening means 15 consist of a support 3 and a connecting screw 5. According to a first embodiment, as represented in FIG. 1, the positioning member 4 is made in one piece The fastening tab 41 is arranged on the pipe 2 and is parallel to the axis D of the pipe 2. The positioning tab 42 is perpendicular to the axis D of the pipe 2 and comprises a housing 6 dimensioned so the second branch 12 of the pipe 1 bears on a portion of the housing 6.

According to a second embodiment, as shown in Figure 2, the positioning member 4 is made in one piece bent in the form of stairs. The fixing lug 41 is arranged on the pipe 2 and is parallel to the axis D of the pipe 2. The positioning tab 42 has two walls:

a first wall 421 substantially perpendicular to the fixing lug 41 and

a second wall 422 substantially perpendicular to the first wall 421. The second wall 422 carries an elastic clamp 7 in which is received the second branch 12 of the pipe 1. The resilient clamp 7 comprises two arms 71, 72 perpendicular to the axis D on the upper surface 422a of the second wall 422. The two arms 71, 72 cooperate with the second branch 12 of the pipe 1 by clipping.

According to a third embodiment, as shown in Figure 3, the positioning member 4 is made in two parts.

The fixing lug 41 is arranged on the pipe 2 and is parallel to the axis D of the pipe 2. The positioning tab 42 comprises a lower part

8, an upper part 9 and positioning means 10 of the upper part 9 with respect to the lower part 8.

The upper part 9 is a removable jumper which overlaps the second branch 12 of the pipe 1. The rider comprises two arms 91, 92 which are vertical, perpendicular to the axis D and whose end is nested in a complementary part of the lower part 8.

The lower part 8 is fixed and connected to the fixing lug

41. This lower part 8 comprises two arms 81, 82 which are vertical, perpendicular to the axis D and which are the complementary part of the jumper. The two arms 91, 92 are thus nested in the two arms 81, 82.

According to one embodiment, the mounting of the pipe 1 of pressure tap relative to the exhaust line 2 can be realized according to the description below.

In a first step, the positioning member 4 is attached to the line 2 by means of the support 3. The fixing lug 41 of the positioning member 4 comprises a cavity (not shown) sized so as to be inserted perpendicularly thereto. to the axis D, the support 3. The support 3 can be fixed, for example, by welding or screwing on the line 2. The screw connection 5 is threaded onto the first branch 11 of the pipe 1. The end of the first branch 11 is inserted coaxially into the support 3. The first branch 11 is substantially perpendicular to the axis D. The branch 12 is positioned to cooperate with the positioning tab 42 to orient the pipe 1 relative to the line 2 at an angle defined between the axis D and the axis of the second branch 12 (about 3 ° in our embodiment). The pipe 1 is fixed to the support 3 by means of the screw connection 5 coaxial with the branch 11. The screw connection 5 is screwed into the support 3. According to the third embodiment, the upper part 9 of the positioning tab 42 can to be withdrawn.

These embodiments make it possible to easily position the pipe 1 relative to the pipe 2 or to reposition the pipe 1 relative to the pipe 2 if the positioning has changed over time. For each of the embodiments, the pipe 1, the positioning member 4, the support 3, the screw connection 5 and the elastic clip 7 must withstand high temperatures (up to 250 ^° C.) transmitted by the line 2 exhaust but also to corrosion and sealing problems. These elements can therefore be chosen steel type 304L stainless steel.

These embodiments apply in the field of the exhaust but it is not excluded to apply this arrangement to other technical fields for different types of pipes.

Claims

1. Positioning arrangement of a pipe (1) on a pipe (2) of axis (D), the pipe (1) being rigid and bent in L and having two branches (1 1, 12): a first branch (1 1) of radial positioning on the pipe (2) and one end of which is fixed by fixing means (15) on the pipe (2), - a second branch (12) substantially parallel to the axis (D) of the pipe (2) characterized in that it comprises a positioning member (4) of the pipe (1) relative to the pipe (2) and the positioning member (4) has at least two legs: - a bracket (41) on the pipe (2), - a positioning tab (42) of the pipe (1) relative to the pipe (2) which cooperates with the second branch (12) of the pipe (1). ). 2. Positioning arrangement according to claim 1, characterized in that the positioning member (4) is made in one piece. 3. Positioning arrangement according to claim 2, characterized in that the positioning member (4) is an L-shaped folded sheet. 4. Positioning arrangement according to claim 3, characterized in that the positioning tab (42) comprises a housing (6) dimensioned such that the second leg (12) of the pipe (1) is supported on a portion housing (6). 5. Positioning arrangement according to claim 2, characterized in that the positioning tab (42) carries a resilient clamp (7) in which is received the second branch (12) of the pipe (1). Positioning arrangement according to claim 1, characterized in that the positioning tab (42) comprises: - a fixed lower part (8) connected to the fixing lug (41), - a removable upper part (9) which cooperates with the second branch (12) of the pipe (1) and - Positioning means (10) of the upper part (9) relative to the lower part (8). 7. Positioning arrangement according to claim 6, characterized in that the upper part (9) is a jumper whose end of the two arms (91, 92) is nested in a complementary part of the lower part (8). 8. Positioning arrangement according to any one of the preceding claims, characterized in that the pipe (1) is a pressure tapping pipe and in that the pipe (2) is an exhaust line. 9. Positioning arrangement according to any one of the preceding claims, characterized in that the fixing means (15) comprise: a support (3) fixed on the pipe (2) - A connecting screw (5) mounted on the end of the first leg (1 1) and fixed on the support (3). 10. Exhaust line (2) characterized in that it comprises a pipe (1) pressure tap positioned relative to the line (2) by a positioning arrangement according to any one of the preceding claims.