Corrugated pipe deformation displacement measuring device and exhaust pipe

Abstract

The utility model discloses a corrugated pipe deformation displacement measuring device and an exhaust pipe, two ends of a corrugated pipe are provided with a first flange and a second flange, the first flange is used for connecting a first exhaust pipe, the second flange is used for connecting a second exhaust pipe, the measuring device comprises a support rod and a probe assembly, one end of the support rod is fixedly arranged on the first flange; a probe assembly is fixedly arranged at the other end; the probe assembly comprises a mounting seat, a probe and a damping piece, the mounting seat is fixedly arranged on the supporting rod, and the probe sleeves the mounting seat and is in sliding connection with the mounting seat through the damping piece; the damping part is used for always providing resistance for the probe to slide relative to the mounting seat; the end, away from the mounting base, of the probe abuts against the outer side wall of the second flange. According to the corrugated pipe deformation displacement measuring device, radial deformation measurement of the corrugated pipe under high temperature and vibration conditions is realized, and related design and fault judgment of the corrugated pipe can be effectively guided.

Description

Technical Field

[0001] The present application relates to the field of engines, and in particular to a bellows deformation displacement measuring device and an exhaust pipe. Background Art

[0002] At present, there are two main failure factors of the bellows connected to the exhaust pipe on the engine: one is high temperature failure and rupture; the other is excessive radial deformation and vibration displacement, which causes the bellows to collide and squeeze with the internal guide pipe and fail. At present, there is a lack of corresponding measurement methods to measure the radial deformation of the bellows under high temperature and vibration conditions. Utility Model Content

[0003] The present application discloses a bellows deformation displacement measuring device and an exhaust pipe, which can measure the radial deformation of the bellows under high temperature and vibration conditions.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A bellows deformation displacement measuring device, wherein a first flange and a second flange are provided at both ends of the bellows, the first flange is used to connect to a first exhaust pipe, and the second flange is used to connect to a second exhaust pipe, the measuring device comprises a support rod and a probe assembly, one end of the support rod is fixed to the first flange, and the other end is fixed to the probe assembly;

[0006] The probe assembly includes a mounting seat, a probe and a damping member. The mounting seat is fixed to the support rod, and the probe is sleeved on the mounting seat and slidably connected to the mounting seat through the damping member. The damping member is used to always provide resistance for the probe to slide relative to the mounting seat. The end of the probe away from the mounting seat is used to abut against the outer wall of the second flange.

[0007] In the engine, the bellows is a tubular elastic element, mainly used for connecting between exhaust pipes, which can effectively solve the problem of axial and radial deformation of the exhaust pipe caused by thermal deformation and vibration displacement, and play an axial and radial compensation role. Specifically: the two ends of the bellows are fixedly connected to the first exhaust pipe and the second exhaust pipe through the first flange and the second flange. The first exhaust pipe and the second exhaust pipe will deform irregularly under the conditions of heat and vibration, thereby driving the first flange and the second flange to move in different directions, pulling the bellows to deform and move. In order to reduce the failure probability of the bellows, it is necessary to measure the deformation of the bellows. The present application provides a bellows deformation displacement measuring device, including a support rod and a probe assembly. Among them, one end of the support rod is fixedly connected to the first flange, and the other end is fixedly connected to the probe assembly. The probe assembly includes a mounting seat, a probe and a damping member. The mounting seat is fixedly connected to the support rod, the probe is set on the mounting seat, and the probe and the mounting seat are slidably connected through the damping member. The damping member is used to always provide resistance for the probe to slide relative to the mounting seat, so as to prevent the probe from sliding relative to the mounting seat due to gravity in a free state, causing the probe to leave the outer wall of the second flange and affect the measurement results. The end of the probe away from the mounting seat is used to contact the outer wall of the second flange. When the bellows is deformed and vibrated at high temperature, the second flange will squeeze the probe to cause the probe and the mounting seat to slide relative to each other. At the same time, the damping member is used to fix the maximum movement position of the probe relative to the mounting seat to avoid the automatic resetting of the probe due to the deformation of the bellows, thereby facilitating the subsequent recording and calculation of the deformation of the bellows. In the actual application process of the bellows deformation displacement measuring device of the present application, multiple measuring devices can be set up. According to the displacement and geometric relationship of the probe in each measuring device, the comprehensive deformation of the bellows under high temperature and vibration displacement can be calculated. The above-mentioned bellows deformation displacement measuring device realizes the radial deformation measurement of the bellows under high temperature and vibration conditions, which can effectively guide the relevant design and fault judgment of the bellows.

[0008] In some embodiments, the damping member includes an elastic sheet;

[0009] The elastic sheet is fixedly mounted on the probe, and the mounting seat is provided with a sliding groove which is slidably connected with the elastic sheet;

[0010] Alternatively, the elastic sheet is fixed to the mounting seat, and the probe is provided with a sliding groove which is slidably connected to the elastic sheet.

[0011] In some embodiments, there are a plurality of damping members, and the plurality of damping members are evenly distributed around the axis of the probe.

[0012] In some embodiments, the probe sleeve is disposed inside the mounting base and is slidably connected to the mounting base via the damping member.

[0013] In some embodiments, scale lines are provided on the outer side wall of the probe, and the extension direction of the scale lines is parallel to the axial direction of the probe.

[0014] In some embodiments, the probe sleeve is disposed outside the mounting base and is slidably connected to the mounting base via the damping member.

[0015] In some embodiments, scale lines are provided on the outer side wall of the mounting seat, and the extending direction of the scale lines is parallel to the axial direction of the mounting seat.

[0016] In some embodiments, the mounting seat is bolted, welded or clamped to the support rod.

[0017] The present application also provides an exhaust pipe, comprising a first exhaust pipe, a second exhaust pipe, a bellows, a guide pipe and a bellows deformation displacement measuring device;

[0018] One end of the bellows is connected to the first exhaust pipe through a first flange, and the other end is connected to the second exhaust pipe through a second flange;

[0019] The bellows is sleeved on the outside of the flow guide pipe, one end of the flow guide pipe is welded to the first flange, and the other end is a free end;

[0020] There are at least four measuring devices, and at least four measuring devices are evenly arranged around the corrugated tube.

[0021] In some embodiments, the measuring device is detachably connected to the first flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a bellows deformation displacement measuring device and an exhaust pipe provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the internal structure of a bellows provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of a probe assembly provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of another probe assembly provided in an embodiment of the present application;

[0026] Figure 5 A structural schematic diagram of a measurement process of a bellows deformation displacement measurement device provided in an embodiment of the present application;

[0027] Icons: 1. bellows; 2. first flange; 3. second flange; 4. first exhaust pipe; 5. second exhaust pipe; 6. guide pipe; 7. bellows deformation displacement measuring device; 71. support rod; 72. probe assembly; 721. mounting seat; 722. probe; 723. damping element; 724. slide groove; a. first measuring device; b. second measuring device; c. third measuring device; d. fourth measuring device. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two.

[0029] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0030] First, as Figure 1-Figure 2 As shown, an embodiment of the present application provides an exhaust pipe, including a bellows 1, a first flange 2, a second flange 3, a first exhaust pipe 4, a second exhaust pipe 5, a guide pipe 6 and a bellows deformation displacement measuring device 7;

[0031] One end of the bellows 1 is connected to the first exhaust pipe 4 through the first flange 2, and the other end is connected to the second exhaust pipe 5 through the second flange 3;

[0032] The bellows 1 is sleeved on the outside of the flow guide pipe 6, one end of the flow guide pipe 6 is welded to the first flange 2, and the other end is a free end;

[0033] There are at least four bellows deformation displacement measuring devices 7 , and at least four measuring devices are evenly arranged around the bellows 1 .

[0034] When the exhaust pipe is applied to an engine, the engine exhaust pipe will be irregularly deformed after being heated and vibrated, and the bellows 1, as a tubular elastic element, is mainly used for connecting exhaust pipes. Figure 1 As shown, one end of the bellows 1 is connected to the first exhaust pipe 4 through the first flange 2, and the other end is connected to the second exhaust pipe 5 through the second flange 3, which can effectively solve the problem of axial and radial deformation of the exhaust pipe caused by thermal deformation and vibration displacement, and play an axial and radial compensation role. A guide tube 6 is sleeved inside the bellows 1, and one end of the guide tube 6 is welded to the first flange 2, and the other end is a free end. When the first exhaust pipe 4 and the second exhaust pipe 5 are irregularly deformed under heat and vibration conditions, the first flange 2 and the second flange 3 will be driven to move in different directions, pulling the bellows 1 to deform and move, so that the bellows 1 collides and squeezes with the internal guide tube 6, causing the bellows 1 to rupture and fail. In order to reduce the failure probability of the bellows 1, it is necessary to measure the deformation of the bellows 1. The present application provides a bellows deformation displacement measuring device 7 for measuring the radial deformation of the bellows 1 under thermal deformation and vibration displacement.

[0035] When the bellows deformation displacement measuring device 7 is actually applied to an engine exhaust pipe, the measuring device may be provided in multiple configurations. Figure 1 As shown, there are four measuring devices, which are evenly arranged around the bellows 1, namely, located at the upper, lower, left and right positions of the second flange 3. Under the conditions of high temperature deformation and vibration displacement of the bellows 1, the four measuring devices will measure different partial displacements, and finally calculate the comprehensive radial deformation of the bellows 1 according to the different partial displacements and geometric relationships.

[0036] For example, Figure 5 As shown, the position indicated by the dotted line is the original position of the flange, and the position indicated by the solid line is the position after thermal deformation and vibration deformation. When the flange is deformed, the first measuring device a and the fourth measuring device d are in contact with the flange and squeezed, and the second measuring device b and the third measuring device c are separated from the flange. The longitudinal partial displacement △S1 and the lateral partial displacement △S2 of the bellows 1 can be obtained by the first measuring device a and the second measuring device d. The maximum radial displacement △S3 of the bellows 1 can be obtained from the geometric relationship. The maximum radial displacement △S3 can effectively guide the relevant design and fault judgment of the bellows. At the same time, the contribution of the partial deformation to the total deformation can be judged based on the results to guide subsequent design improvements.

[0037] It should be noted that the number of measuring devices may also be 5, 6, 7, 8, etc., and the multiple measuring devices may be evenly arranged around the bellows 1 .

[0038] In some embodiments, the bellows deformation displacement measuring device 7 is detachably connected to the first flange 2. For example, the bellows deformation displacement measuring device 7 is connected to the first flange 2 by bolt connection or clamping.

[0039] Second, as Figure 1 , 3 4, the embodiment of the present application provides a bellows deformation displacement measuring device, the bellows 1 is provided with a first flange 2 and a second flange 3 at both ends, the first flange 1 is used to connect the first exhaust pipe 4, the second flange 3 is used to connect the second exhaust pipe 5, the measuring device includes a support rod 71 and a probe assembly 72, one end of the support rod 71 is fixed to the first flange 2, and the other end is fixed to the probe assembly 72;

[0040] The probe assembly 72 includes a mounting seat 721, a probe 722 and a damping member 723. The mounting seat 721 is fixed to the support rod 71, and the probe 722 is sleeved on the mounting seat 721 and slidably connected to the mounting seat 721 through the damping member 723; the damping member 723 is used to always provide resistance for the probe 722 to slide relative to the mounting seat 721; the end of the probe 722 away from the mounting seat 721 is used to abut against the outer wall of the second flange 3.

[0041] The bellows deformation displacement measuring device 7 comprises a support rod 71 and a probe assembly 72. One end of the support rod 71 is fixedly connected to the first flange 2, and the other end is fixedly connected to the probe assembly 72. The probe assembly 72 comprises a mounting seat 721, a probe 722 and a damping member 723. The mounting seat 721 is fixedly connected to the support rod 71, the probe 722 is sleeved on the mounting seat 721, and the probe 722 and the mounting seat 721 are slidably connected via the damping member 723. The damping member 723 is used to always provide resistance to the sliding of the probe 722 relative to the mounting seat 721, so as to prevent the probe 722 from sliding relative to the mounting seat 721 due to gravity in a free state, so that the probe 722 leaves the outer wall of the second flange 3 and affects the measurement result. The end of the probe 722 away from the mounting seat 721 is used to contact the outer wall of the second flange 3. When the bellows is deformed and vibrated at high temperature, the second flange will squeeze the probe 722 and the mounting seat 721 to slide relative to each other. At the same time, the damping member 723 is used to fix the maximum movement position of the probe 722 relative to the mounting seat 721 to avoid the automatic resetting of the probe 722 due to the recovery of the deformation of the bellows 1, thereby facilitating the subsequent recording of the displacement of the probe 722. In the actual application process of the bellows deformation displacement measuring device of the present application, multiple measuring devices can be set up. According to the displacement and geometric relationship of the probe 722 in each measuring device, the comprehensive deformation of the bellows 1 under high temperature and vibration displacement can be calculated. The above-mentioned bellows deformation displacement measuring device 7 realizes the radial deformation measurement of the bellows under high temperature and vibration conditions, which can effectively guide the relevant design and fault judgment of the bellows.

[0042] In some embodiments, the probe 722 is sleeved inside the mounting seat 721 and is slidably connected to the mounting seat 721 via the damping member 723 .

[0043] One possible way to achieve this is as follows: Figure 4 As shown, the probe 722 can also be arranged inside the mounting seat 721. According to the above description of the elastic member and the slide groove 724, it can be understood that the elastic sheet can be arranged on the inner side wall of the mounting seat 721, and the outer side wall of the probe 722 is provided with the slide groove 724 slidably connected to the elastic sheet, or the elastic sheet is arranged on the outer side wall of the probe 722, and the slide groove 724 slidably connected to the elastic sheet is arranged on the inner side wall of the mounting seat 721. In addition, the elastic sheet can also be arranged in plurality, and the plurality of elastic sheets are evenly distributed around the axis of the mounting seat 721.

[0044] In some embodiments, scale lines are provided on the outer side wall of the probe 722 , and the extension direction of the scale lines is parallel to the axial direction of the probe 722 .

[0045] One possible way to achieve this is as follows: Figure 4 As shown, when the probe 722 is sleeved inside the mounting seat 721, a scale line is set on the outer wall of the probe 722, and the extension direction of the scale line is parallel to the axial direction of the probe 722. When the probe 722 is not subjected to the extrusion force of the flange, the relative position of the probe 722 and the mounting seat 721 is at the first scale. When the bellows 1 is deformed, the flange squeezes the probe 722, so that the relative position of the probe 722 and the mounting seat 721 is at the second scale, wherein the second scale is the position corresponding to the maximum displacement of the flange squeezing the probe 722 during the high temperature and vibration deformation process of the bellows 1. After the bellows 1 recovers from deformation, the probe 722 remains at the position of the second scale, and the difference between the first scale and the second scale is the partial deformation amount of the bellows 1 in the axial direction of the probe 722.

[0046] In some embodiments, the probe 722 is sleeved on the outside of the mounting seat 721 and is slidably connected to the mounting seat 721 via a damping member 723 .

[0047] In some embodiments, scale lines are provided on the outer side wall of the mounting seat 721 , and the extending direction of the scale lines is parallel to the axial direction of the mounting seat 721 .

[0048] Another possible implementation method is Figure 3 As shown, when the probe 722 is sleeved outside the mounting seat 721, a scale line is provided on the outer wall of the mounting seat 721, and the extension direction of the scale line is parallel to the axial direction of the mounting seat 721. The measurement principle of the partial deformation of the bellows 1 in the axial direction of the probe 722 is consistent with the above description and will not be repeated here.

[0049] In some embodiments, the damping member 723 includes an elastic sheet;

[0050] The elastic sheet is fixed to the probe 722, and the mounting seat 721 is provided with a sliding groove 724 which is slidably connected to the elastic sheet;

[0051] Alternatively, the elastic sheet is fixed to the mounting seat 721 , and the probe 722 is provided with a sliding groove 724 that is slidably connected to the elastic sheet.

[0052] One possible way to achieve this is as follows: Figure 3 As shown, the probe 722 is sleeved on the outside of the mounting seat 721. The damping member 723 can be an elastic sheet, which is arranged on the inner side wall of the probe 722. The outer side wall of the mounting seat 721 is provided with a slide groove 724 matching the elastic sheet, which is used to make part of the elastic sheet slide into the slide groove 724 to fix the probe 722 in the initial position, and also used to make the elastic sheet continue to slide into the slide groove 724 when the bellows is deformed and fix the probe 722 in the final position, that is, the probe 722 can only move in one direction, so as to facilitate recording the displacement of the probe 722 after the bellows 1 recovers its deformation.

[0053] It is understandable that the elastic sheet can also be arranged on the outer wall of the mounting seat 721, and the inner wall of the probe 722 is provided with a slide groove 724 slidably connected to the elastic sheet, which can also fix the probe 722 and record the displacement.

[0054] Another possible implementation method is Figure 4 As shown, the probe 722 is sleeved inside the mounting seat 721. At this time, the elastic sheet is arranged on the inner side wall of the mounting seat 721, and the outer side wall of the probe 722 is provided with a slide groove 724 that is slidably connected to the elastic sheet. It can be understood that the elastic sheet can also be arranged on the outer side wall of the probe 722, and the inner side wall of the mounting seat 721 is provided with a slide groove 724 that is slidably connected to the elastic sheet.

[0055] In some embodiments, there are multiple damping members 723 , and the multiple damping members 723 are evenly distributed around the axis of the mounting base 721 .

[0056] In one possible implementation, in order to better fix the probe 722, there are multiple damping members 723. Figure 3 As shown, the inner wall of the probe 722 is provided with four damping members 723, and the four damping members 723 are evenly distributed around the axis of the probe 722. With such a configuration, after the damping member 723 slides into the slide groove 74, the probe 722 is evenly stressed, the position is more stable, and the measurement error is reduced. It should be noted that the number of damping members 723 can also be set to 5, 6, 7, 8, etc., and the number of the slide grooves 724 corresponds to the number of damping members 723, so as to better fix the position of the probe 722.

[0057] In some embodiments, the mounting seat 721 is bolted, welded, or clamped to the support rod 71 .

[0058] The bellows deformation displacement measuring device of the embodiment of the present application realizes the radial deformation measurement of the bellows 1 under high temperature and vibration conditions through the probe assembly 72, which can effectively guide the gap design between the bellows 1 and the flow guide tube 6 and the judgment of the failure cause of the bellows 1. At the same time, the contribution of the partial deformation to the total deformation can be judged according to the results to guide subsequent design improvements.

[0059] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A bellows deformation displacement measuring device, wherein the bellows is provided with a first flange and a second flange at both ends, wherein the first flange is used to connect to a first exhaust pipe, and the second flange is used to connect to a second exhaust pipe, wherein: The measuring device comprises a support rod and a probe assembly, one end of the support rod is fixed to the first flange, and the other end is fixed to the probe assembly; The probe assembly includes a mounting seat, a probe and a damping member. The mounting seat is fixed to the support rod, and the probe is sleeved on the mounting seat and slidably connected to the mounting seat through the damping member. The damping member is used to always provide resistance for the probe to slide relative to the mounting seat. The end of the probe away from the mounting seat is used to abut against the outer wall of the second flange.

2. The measuring device according to claim 1, characterized in that The damping member comprises an elastic sheet; The elastic sheet is fixedly mounted on the probe, and the mounting seat is provided with a sliding groove which is slidably connected with the elastic sheet; Alternatively, the elastic sheet is fixed to the mounting seat, and the probe is provided with a sliding groove which is slidably connected to the elastic sheet.

3. The measuring device according to claim 2, characterized in that There are multiple damping members, and the multiple damping members are evenly distributed around the axis of the probe.

4. The measuring device according to claim 1, characterized in that The probe sleeve is arranged inside the mounting seat and is slidably connected with the mounting seat through the damping member.

5. The measuring device according to claim 4, characterized in that The outer side wall of the probe is provided with scale lines, and the extending direction of the scale lines is parallel to the axial direction of the probe.

6. The measuring device according to claim 1, characterized in that The probe sleeve is arranged outside the mounting seat and is slidably connected with the mounting seat through the damping member.

7. The measuring device according to claim 6, characterized in that The outer side wall of the mounting seat is provided with scale lines, and the extending direction of the scale lines is parallel to the axial direction of the mounting seat.

8. The measuring device according to claim 1, characterized in that The mounting seat is bolted, welded or clamped to the support rod.

9. An exhaust pipe, characterized in that: It comprises a first exhaust pipe, a second exhaust pipe, a bellows, a guide pipe and a bellows deformation displacement measuring device as claimed in any one of claims 1 to 8; One end of the bellows is connected to the first exhaust pipe through a first flange, and the other end is connected to the second exhaust pipe through a second flange; The bellows is sleeved on the outside of the flow guide pipe, one end of the flow guide pipe is welded to the first flange, and the other end is a free end; There are at least four measuring devices, and at least four measuring devices are evenly arranged around the corrugated tube.

10. The exhaust pipe according to claim 9, characterized in that The measuring device is detachably connected to the first flange.

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