A high temperature resistant automobile exhaust flexible pipe and its production process

Abstract

The present invention belongs to the technical field of flexible pipes, and in particular relates to a high-temperature resistant automobile exhaust flexible pipe, comprising: two inner pipes, which are arranged at intervals; an expansion joint, whose two ends are respectively connected to the opposite ends of the two inner pipes; a bellows, whose two ends are respectively connected to the ends of the two inner pipes that are away from each other; a protective outer net, which is sleeved on the outside of the bellows, and the two ends of the protective outer net are sleeved on the two ends of the bellows; and two ferrules, which are sleeved on the two ends of the protective outer net; wherein the bellows is sleeved on the outside of the expansion joint, and the ferrules press the bellows and the protective outer net onto the inner pipe, and the ends of the bellows, the protective outer net and the ferrules are all connected to the outer wall of the inner pipe by welding.

Description

Technical Field

[0001] The invention relates to the technical field of flexible pipes, and in particular to a high-temperature resistant automobile exhaust flexible pipe and a production process thereof. Background Art

[0002] The automobile flexible pipe connects the engine and the exhaust system, and is an important connector that absorbs and reduces vibration. The use of automobile flexible joints can increase the comfort of passengers, effectively improve the working environment of the purification device in the exhaust system, and protect and extend the service life of the air purifier and the engine. The automobile flexible pipe is mainly composed of four parts: the outer net, the bellows, the expansion joint and the clamp ring.

[0003] In the prior art, most automobile flexible pipes are not provided with inner pipes, which results in greater stress on the connection between the automobile flexible pipe and the engine and the exhaust system, and easily causes damage to the connection of the automobile flexible pipe. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high temperature resistant automobile exhaust flexible pipe and a production process thereof to solve the above problems.

[0005] In view of this, the present invention provides a high temperature resistant automobile exhaust flexible pipe, comprising:

[0006] Two inner tubes, spaced apart;

[0007] The expansion joint has two ends connected to the opposite ends of the two inner tubes;

[0008] The two ends of the bellows are respectively connected to the ends of the two inner tubes which are away from each other;

[0009] The protective outer net is placed on the outside of the corrugated pipe, and the two ends of the protective outer net are placed on the two ends of the corrugated pipe;

[0010] and two ferrules, which are placed on both ends of the protective outer net;

[0011] The bellows sleeve is placed outside the telescopic joint, the ferrule presses the bellows and the protective outer net onto the inner tube, and the ends of the bellows, the protective outer net and the ferrule are all connected to the outer wall of the inner tube by welding.

[0012] By adopting the above technical solution and through the setting of the inner tube, the two inner tubes can be plugged into the engine and the exhaust system for welding, which increases the force on the inner tube, thereby enhancing the welding strength of the connection and avoiding direct welding of the expansion joint, bellows and protective outer net to the engine and the exhaust system. Through the coordinated setting of the expansion joint, bellows and protective outer net, it can play a role in guiding, absorbing and reducing vibration. Through the setting of the ferrule, the connection between the bellows and the protective outer net can be made more firmly.

[0013] In the above technical solution, the inner tube further comprises:

[0014] The two small diameter portions of the two inner tubes are arranged opposite to each other.

[0015] The step portion is arranged at one end of the two small diameter portions which are away from each other;

[0016] and a large diameter portion, disposed at one end of the two step portions which are away from each other;

[0017] Wherein, the expansion joint is arranged on the outer side walls of the two small diameter parts, and the bellows is arranged on the outer side walls of the two large diameter parts;

[0018] In the present technical solution, the telescopic joint can be installed by setting the small diameter portion, the gas can be better guided by setting the step portion, the bellows, the protective outer net and the ferrule can be connected by setting the large diameter portion, and the engine and the exhaust system can also be connected.

[0019] In the above technical solution, the following steps are further included:

[0020] S1: firstly, the inner tube is mounted on the clamping end of the grinding device, and then the inner wall and the outer wall of the inner tube are ground by the grinding end of the grinding device;

[0021] S2: Put the two ends of the expansion joint on the outer wall of the small diameter part respectively, and then weld the expansion joint and the small diameter part;

[0022] S3: Place the bellows sleeves at both ends of the two large diameter parts, place the protective outer net sleeves at both ends of the large diameter parts, and the inner wall of the protective outer net is attached to the outer wall of the bellows;

[0023] S4: Place two ferrules on both ends of the protective outer net, and then press the corrugated tube and the protective outer net onto the inner tube using a crimping machine;

[0024] S5: welding the end of the corrugated pipe, the end of the protective outer net and the end of the ferrule to the outer wall of the inner pipe;

[0025] In the present technical solution, through the setting of S1, the inner wall and the outer wall of the inner tube can be polished to achieve the best flatness of the inner wall and the outer wall, so that when the inner wall of the inner tube is inserted into the outer wall of the exhaust manifold or the outer wall of the catalyst converter, it can reach the best and will not tilt, thereby increasing the structural strength during welding. Through the setting of S2, the expansion joint can be installed, through the setting of S3, the bellows and the protective outer net can be installed, through the setting of S4, the bellows and the protective outer net can be fixed, and through the setting of S5, the connection between the bellows, the protective outer net and the ferrule can be made more secure.

[0026] In the above technical solution, the grinding device further comprises:

[0027] A support plate, wherein two support blocks are spaced apart in the length direction of the top end of the support plate;

[0028] A connecting plate, disposed between the two supporting blocks and located at one end of the two supporting blocks;

[0029] A first rotating motor is arranged on the supporting plate between the two supporting blocks, and the first rotating motor is located at one end of the two supporting blocks away from the connecting plate;

[0030] A threaded rod, one end of which is connected to the output end of the first rotating motor, and the other end of which is rotatably connected to the connecting plate;

[0031] A moving block, threadedly connected to the threaded rod;

[0032] Two anti-rotation blocks, one end of which is respectively arranged on both sides of the moving block, and the other end of which slides on the two supporting blocks;

[0033] A grinding mechanism is arranged on the top of the moving block;

[0034] and a clamping mechanism, which is arranged at the top end of the support plate, and the clamping mechanism is located at a side of the connecting plate away from the first rotating motor;

[0035] Wherein, the two support blocks are both provided with sliding holes for the anti-rotation block to move, the clamping mechanism is used to clamp the inner tube, and the grinding mechanism is used to grind the outer wall and the inner wall of the inner tube.

[0036] In the present technical solution, when the first rotating motor rotates, the moving block moves horizontally between the two supporting blocks, thereby causing the grinding mechanism to move horizontally. By setting the connecting plate, the threaded rod can be installed. By setting the two anti-rotation blocks, the moving block can be prevented from rotating. By setting the sliding holes, the anti-rotation blocks can move stably. By setting the clamping mechanism, the inner tube can be clamped. By setting the grinding mechanism, the outer wall and inner wall of the inner tube can be ground.

[0037] In the above technical solution, the grinding mechanism further comprises:

[0038] A mounting block, arranged at the top of the moving block, wherein a mounting groove is provided on one end of the mounting block facing the clamping mechanism;

[0039] A rotating block, one end of which is rotatably connected to the mounting groove and the other end of which extends out of the mounting groove, wherein the rotating block is provided with a plurality of first moving holes arranged in a circumferential direction around the central axis of the rotating block;

[0040] A first limiting ring, the inner wall of which is connected to the outer wall of the rotating block, and the outer wall is rotatably connected to the inner wall of the mounting groove;

[0041] A driving structure, rotatably connected to a side of the rotating block facing the bottom of the installation groove;

[0042] A limiting structure is rotatably connected to the inner wall of the mounting groove, and the limiting structure is located between the rotating block and the driving structure;

[0043] The rotating structure has a fixed end disposed at the top of the mounting block, and an output end extending through the mounting groove and rotatably connected to the rotating block;

[0044] A plurality of connecting rods, one end of which respectively passes through the plurality of moving holes, the limiting structures and is connected to the driving structure, and the other end of which is located outside the moving holes;

[0045] and a plurality of grinding blocks, each of which is connected to one end of the connecting rod away from the moving hole;

[0046] Among them, a first ring groove for the first limiting ring to rotate is provided on the inner wall of the installation groove, a first rotating bearing is provided between the bottom of the first ring groove and the first limiting ring, the driving structure is used to drive the connecting rod to move in the moving hole, the limiting structure is used to prevent the connecting rod from moving out of the driving structure, and the rotating structure is used to drive the rotating block to rotate.

[0047] In the present technical scheme, the installation groove can be set by setting the installation block, and the rotating block, driving structure and limiting structure can be installed by setting the installation groove. By setting the driving structure, when the driving structure rotates alone, the connecting rod can be moved to the moving hole, so that several connecting rods are brought closer to or separated from each other. When the rotating structure rotates at the same speed as the rotating block, several connecting rods rotate and the connecting rods do not move in the moving hole. When the driving structure and the rotating block rotate at the same time and the driving structure speed is inconsistent with the rotating block, several connecting rods are brought closer to or separated from each other while rotating, so as to grind different diameters of the inner tube. By setting the grinding block, grinding can be carried out. By setting the limiting structure, the connecting rod can be prevented from moving out of the driving structure. By cooperating with the first limiting ring and the first ring groove, the rotating block can be prevented from moving left and right. By setting the first rotating bearing, the rotating block can be rotated better.

[0048] In the above technical solution, the driving structure further comprises:

[0049] A driving motor, the fixed end of which is arranged at one end of the mounting block away from the mounting slot, and the rotating end of which passes through the mounting block and is connected to the mounting slot;

[0050] The driving block is connected to the rotating end of the driving motor and is rotatably connected in the mounting groove. The driving block is provided with a plurality of action grooves arranged in a circumferential direction with the central axis of the driving block on one end facing the limiting structure.

[0051] and a second limiting ring, the inner wall of which is fixedly connected to the outer wall of the driving block, and the outer wall of which is rotatably connected to the inner wall of the mounting groove;

[0052] Among them, the connecting rods are respectively inserted into the action grooves and abut against the bottom of the action grooves. A second ring groove for the second limiting ring to rotate is provided on the inner wall of the installation groove. A second rotating bearing is provided between the bottom of the second ring groove and the second limiting ring. The action groove is used to drive the connecting rod to move in the moving hole.

[0053] In the present technical solution, the driving block can be rotated by the setting of the driving motor, the connecting rod can be moved in the first moving hole by the setting of the action groove, the driving block can be prevented from moving left and right by the cooperation of the second limiting ring and the second ring groove, and the driving block can be rotated better by the setting of the second rotating bearing.

[0054] In the above technical solution, the further limiting structure includes:

[0055] A limit block is rotatably connected to the inner wall of the installation groove, and a plurality of second movable holes are arranged in a circumferential direction around the central axis on the end of the limit block;

[0056] A third limiting ring, the inner wall of which is fixedly connected to the outer wall of the limiting block, and the outer wall of which is rotatably connected to the inner wall of the mounting groove;

[0057] Among them, a number of the second movable holes are arranged corresponding to a number of the first movable holes, a number of the connecting rods respectively penetrate the number of the second movable holes, a number of the connecting rods are provided with a limit plate on the outer wall of one end of the driving structure, one end wall of the limit plate is attached to the limit block, a third ring groove for the third limit ring to rotate is provided on the inner wall of the installation groove, and a third rotating bearing is provided between the bottom of the third ring groove and the third limit ring.

[0058] In the present technical solution, the setting of the limit block and the second movable hole can enable the connecting rod to move normally. The setting of the limit plate can prevent the connecting rod from moving away from the driving structure. The cooperation of the third limit ring and the third ring groove can prevent the limit block from moving left and right. The setting of the third rotating bearing can enable the rotating block to rotate better.

[0059] In the above technical solution, the rotating structure further includes a first bevel gear arranged on the outer wall of the rotating block, a movable ring groove arranged on the inner wall of the mounting groove for the first bevel gear to rotate, a through hole arranged at the top of the mounting block and connected to the movable ring groove, a second rotating motor with a fixed end arranged at the top of the mounting block and an output end connected to the through hole, and a second bevel gear arranged at the rotating end of the second rotating motor, and the second bevel gear is meshed with the first bevel gear.

[0060] In the technical solution, the first bevel gear can be moved by setting the movable annular groove, the rotation end of the second rotating motor can be prevented by setting, and the rotating block can be rotated by the cooperation between the first bevel gear and the second bevel gear.

[0061] In the above technical solution, the clamping mechanism further comprises:

[0062] A mounting plate, arranged on the top of the supporting plate;

[0063] A connecting plate, detachably connected to a side of the mounting plate facing the grinding mechanism;

[0064] A plurality of hydraulic cylinders are respectively arranged on the side of the connecting plate facing the grinding mechanism, the fixed ends of the plurality of hydraulic cylinders are respectively arranged in a circumferential direction with the central axis of the connecting plate, and the output ends respectively extend toward the central axis of the connecting plate;

[0065] A plurality of arc blocks are respectively connected to the output ends of a plurality of hydraulic cylinders;

[0066] and a plurality of anti-slip pads, respectively connected to the inner wall and the outer wall of the arc-shaped block;

[0067] Wherein, when the hydraulic cylinders are extended, the arc blocks are brought closer to each other to clamp the outer wall of the inner tube, and when the hydraulic cylinders are retracted, the arc blocks are separated from each other to clamp the inner wall of the inner tube.

[0068] In the present technical solution, the connecting plate can be installed by setting the mounting plate, and the detachable connection of the connecting plate facilitates maintenance by the operator. The arc blocks can be moved closer to or separated from each other by setting a number of hydraulic rods, and the inner tube can be clamped by the cooperation of the arc blocks and the anti-slip pads. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0070] Figure 1 This is a schematic diagram of the structure of an automobile exhaust flexible pipe according to a specific embodiment of the present invention;

[0071] Figure 2 The overall structure of the grinding device according to the specific embodiment of the present invention is shown in FIG. Figure 1 ;

[0072] Figure 3The overall structure of the grinding device according to the specific embodiment of the present invention is shown in FIG. Figure 2 ;

[0073] Figure 4 It is a schematic diagram of a grinding mechanism in a specific embodiment of the present invention;

[0074] Figure 5 Schematic diagram of a driving block according to a specific embodiment of the present invention.

[0075] Figure numerals: 1, inner tube; 2, expansion joint; 3, bellows; 4, protective outer net; 5, ferrule; 6, small diameter portion; 7, step portion; 8, large diameter portion; 9, grinding device; 10, support plate; 11, first rotating motor; 12, support block; 13, connecting plate; 14, threaded rod; 15, moving block; 16, anti-rotation block; 17, grinding mechanism; 18, clamping mechanism; 19, sliding hole; 20, mounting block; 21, rotating block; 22, mounting groove; 23, first moving hole; 24, first limiting ring; 25, connecting rod; 26, grinding block; 27, first A ring groove; 28, a first rotating bearing; 29, a driving motor; 30, a driving block; 31, a second limiting ring; 32, an action groove; 33, a second ring groove; 34, a second rotating bearing; 35, a limiting block; 36, a second movable hole; 37, a third limiting ring; 38, a third ring groove; 39, a third rotating bearing; 40, a limiting plate; 41, a first bevel gear; 42, a movable ring groove; 43, a through hole; 44, a second rotating motor; 45, a second bevel gear; 46, a mounting plate; 47, a connecting plate; 48, a hydraulic cylinder; 49, an arc block; 50, an anti-slip pad. DETAILED DESCRIPTION

[0076] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0077] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0078] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the front and back related objects are in an "or" relationship, such as a high-temperature resistant automobile exhaust flexible pipe and its production process.

[0079] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0080] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0081] Embodiment 1:

[0082] This embodiment provides a high temperature resistant automobile exhaust flexible pipe, comprising:

[0083] Two inner tubes 1, arranged at intervals;

[0084] The expansion joint 2 has two ends connected to opposite ends of the two inner tubes 1;

[0085] The two ends of the bellows 3 are respectively connected to the ends of the two inner tubes 1 which are away from each other;

[0086] The protective outer net 4 is sleeved on the outside of the corrugated pipe 3, and the two ends of the protective outer net 4 are sleeved on the two ends of the corrugated pipe 3;

[0087] and two ferrules 5, which are placed on both ends of the protective outer net 4;

[0088] The bellows 3 is sleeved on the outside of the telescopic joint 2, and the ferrule 5 presses the bellows 3 and the protective outer net 4 onto the inner tube 1. The ends of the bellows 3, the protective outer net 4 and the ferrule 5 are all connected to the outer wall of the inner tube 1 by welding.

[0089] Through the arrangement of the inner tube 1, the two inner tubes 1 can be plugged into the engine and the exhaust system for welding, which increases the stress on the inner tube 1, thereby enhancing the welding strength of the joint and avoiding direct welding of the expansion joint 2, the bellows 3 and the protective outer net 4 on the engine and the exhaust system. Through the coordinated arrangement of the expansion joint 2, the bellows 3 and the protective outer net 4, the functions of flow guidance, vibration absorption and vibration reduction can be achieved. Through the arrangement of the ferrule 5, the connection between the bellows 3 and the protective outer net 4 can be made more firmly.

[0090] Embodiment 2:

[0091] In this embodiment, in addition to the structural features of the above-mentioned embodiments, the inner tube 1 further comprises:

[0092] The small diameter portion 6, the two small diameter portions 6 of the two inner tubes 1 are arranged opposite to each other,

[0093] The step portion 7 is provided at one end of the two small diameter portions 6 which are away from each other;

[0094] and a large diameter portion 8, which is disposed at one end of the two step portions 7 which are away from each other;

[0095] The expansion joint 2 is arranged on the outer side walls of the two small diameter parts 6, and the bellows 3 is arranged on the outer side walls of the two large diameter parts;

[0096] By setting the small diameter portion 6, the expansion joint 2 can be installed, by setting the step portion 7, the gas can be better guided, and by setting the large diameter portion 8, the bellows 3, the protective outer net 4 and the ferrule 5 can be connected, and the engine and the exhaust system can also be connected.

[0097] Embodiment 3:

[0098] In addition to the structural features of the above embodiments, this embodiment further includes the following steps:

[0099] S1: firstly, the inner tube 1 is mounted on the clamping end of the grinding device 9, and then the inner wall and the outer wall of the inner tube 1 are ground by the grinding end of the grinding device 9;

[0100] S2: The two ends of the telescopic joint 2 are respectively placed on the outer wall of the small diameter portion 6, and then the telescopic joint 2 and the small diameter portion 6 are welded;

[0101] S3: Put the bellows 3 on both ends of the two large diameter parts, put the protective outer net 4 on both ends of the large diameter parts, and the inner wall of the protective outer net 4 is attached to the outer wall of the bellows 3;

[0102] S4: Put two ferrules 5 on both ends of the protective outer net 4, and then press the corrugated tube 3 and the protective outer net 4 onto the inner tube 1 by a crimping machine;

[0103] S5: welding the end of the corrugated pipe 3, the end of the protective outer net 4 and the end of the ferrule 5 to the outer wall of the inner pipe 1;

[0104] Through the setting of S1, the inner wall and the outer wall of the inner tube 1 can be polished to achieve the best flatness of the inner wall and the outer wall, so that when the inner wall of the inner tube 1 is inserted into the outer wall of the exhaust manifold or the outer wall of the catalyst converter, it can reach the best and will not tilt, thereby increasing the structural firmness during welding. Through the setting of S2, the expansion joint 2 can be installed, through the setting of S3, the bellows 3 and the protective outer net 4 can be installed, through the setting of S4, the bellows 3 and the protective outer net 4 can be fixed, and through the setting of S5, the connection between the bellows 3, the protective outer net 4 and the ferrule 5 can be made more secure.

[0105] Embodiment 4:

[0106] In this embodiment, in addition to the structural features of the above-mentioned embodiments, the grinding device 9 further includes:

[0107] A support plate 10, wherein two support blocks 12 are spaced apart at the top of the support plate 10 in the length direction;

[0108] A connecting plate 13 is disposed between the two supporting blocks 12 and located at one end of the two supporting blocks 12;

[0109] A first rotating motor 11 is disposed on the supporting plate 10 between the two supporting blocks 12, and the first rotating motor 11 is located at one end of the two supporting blocks 12 away from the connecting plate 13;

[0110] A threaded rod 14, one end of which is connected to the output end of the first rotating motor 11, and the other end of which is rotatably connected to the connecting plate 13;

[0111] The moving block 15 is threadedly connected to the threaded rod 14;

[0112] Two anti-rotation blocks 16, one end of which is respectively arranged on both sides of the moving block 15, and the other end of which slides on the two supporting blocks 12;

[0113] A grinding mechanism 17 is disposed on the top of the moving block 15;

[0114] and a clamping mechanism 18, which is disposed at the top of the support plate 10, and the clamping mechanism 18 is located at a side of the connecting plate 13 away from the first rotating motor 11;

[0115] The two support blocks 12 are both provided with a sliding hole 19 for the anti-rotation block 16 to move, the clamping mechanism 18 is used to clamp the inner tube 1, and the grinding mechanism 17 is used to grind the outer wall and the inner wall of the inner tube;

[0116] When the first rotating motor 11 rotates, the moving block 15 moves horizontally between the two supporting blocks 12, so that the grinding mechanism 17 moves horizontally. Through the setting of the connecting plate 13, the threaded rod 14 can be installed. Through the setting of the two anti-rotation blocks 16, the moving block 15 can be prevented from rotating. Through the setting of the sliding hole 19, the anti-rotation block 16 can move stably. Through the setting of the clamping mechanism 18, the inner tube 1 can be clamped. Through the setting of the grinding mechanism 17, the outer wall and inner wall of the inner tube 1 can be ground.

[0117] Embodiment 5:

[0118] In this embodiment, in addition to the structural features of the above-mentioned embodiments, the grinding mechanism 17 further includes:

[0119] A mounting block 20 is disposed at the top of the moving block 15, and a mounting groove 22 is provided on one end of the mounting block 20 facing the clamping mechanism 18;

[0120] The rotating block 21 has one end rotatably connected to the mounting groove 22 and the other end extending out of the mounting groove 22. The rotating block 21 is provided with a plurality of first moving holes 23 arranged in a circumferential direction around the central axis of the rotating block 21.

[0121] A first limiting ring 24, the inner wall of which is connected to the outer wall of the rotating block, and the outer wall of which is rotatably connected to the inner wall of the mounting groove 22;

[0122] A driving structure, rotatably connected to a side of the rotating block 21 facing the bottom of the mounting groove 22;

[0123] A limiting structure, rotatably connected to the inner wall of the mounting groove 22, and the limiting structure is located between the rotating block 21 and the driving structure;

[0124] The rotating structure has a fixed end disposed at the top of the mounting block 20 and an output end extending through the mounting slot 22 and rotatably connected to the rotating block 21;

[0125] A plurality of connecting rods 25, one end of which respectively passes through the plurality of moving holes, the limiting structures and is connected to the driving structure, and the other end of which is located outside the moving holes;

[0126] and a plurality of grinding blocks 26, respectively connected to one end of the connecting rod 25 away from the moving hole;

[0127] The inner wall of the mounting groove 22 is provided with a first ring groove 27 for the first limiting ring 24 to rotate, and a first rotating bearing 28 is provided between the bottom of the first ring groove 27 and the first limiting ring 24. The driving structure is used to drive the connecting rod 25 to move in the moving hole, and the limiting structure is used to prevent the connecting rod 25 from moving out of the driving structure. The rotating structure is used to drive the rotating block 21 to rotate;

[0128] By setting the mounting block 20, the mounting groove 22 can be set. By setting the mounting groove 22, the rotating block 21, the driving structure and the limiting structure can be installed. By setting the driving structure, when the driving structure rotates alone, the connecting rod 25 can be moved to the moving hole, so that a plurality of connecting rods 25 can be brought closer to each other or separated from each other. When the rotating structure rotates at the same speed as the rotating block 21, a plurality of connecting rods 25 rotate and the connecting rods do not move in the moving hole. When the driving structure and the rotating block 21 rotate at the same time and the driving structure speed is inconsistent with the rotating block 21, if The dry connecting rod 25 moves closer to or away from each other while rotating, so as to grind the different diameters of the inner tube 1. The grinding block 26 is provided to enable grinding. The limiting structure is provided to prevent the connecting rod from moving out of the driving structure. The cooperation between the first limiting ring 24 and the first ring groove 27 can prevent the rotating block 21 from moving left and right. The first rotating bearing 28 is provided to enable the rotating block 21 to rotate better. The above-mentioned mounting block 20 is detachably connected by two blocks, and the two blocks divide the mounting groove 22 into two, thereby achieving better convenience during overall installation and maintenance and replacement.

[0129] Embodiment 6:

[0130] In this embodiment, in addition to the structural features of the above-mentioned embodiments, the driving structure further includes:

[0131] A driving motor 29, a fixed end of which is disposed at one end of the mounting block 20 away from the mounting groove 22, and a rotating end of which passes through the mounting block 20 and is connected to the mounting groove 22;

[0132] The driving block 30 is connected to the rotating end of the driving motor 29 and is rotatably connected in the mounting groove 22. The driving block 30 is provided with a plurality of action grooves 32 arranged in a circumferential direction around the central axis of the driving block 30 on one end facing the limiting structure.

[0133] and a second limiting ring 31, the inner wall of which is fixedly connected to the outer wall of the driving block 30, and the outer wall of which is rotatably connected to the inner wall of the mounting groove 22;

[0134] The connecting rods 25 are respectively inserted into the action grooves 32 and abut against the bottom of the action grooves 32. The inner wall of the mounting groove 22 is provided with a second ring groove 33 for the second limiting ring 31 to rotate. A second rotating bearing 34 is provided between the bottom of the second ring groove 33 and the second limiting ring 31. The action grooves 32 are used to drive the connecting rod 25 to move in the moving hole.

[0135] By setting the driving motor 29, the driving block 30 can be rotated, and by setting the action groove 32, the connecting rod 25 can be moved in the first moving hole 23. By the cooperation of the second limiting ring 31 and the second ring groove 33, the driving block 30 can be prevented from moving left and right. By setting the second rotating bearing 34, the driving block 30 can be rotated better.

[0136] Embodiment 7:

[0137] In this embodiment, in addition to the structural features of the above-mentioned embodiments, the limiting structure further includes:

[0138] The limit block 35 is rotatably connected to the inner wall of the mounting groove 22, and a plurality of second movable holes 36 are arranged in a circumferential direction around the central axis on the end of the limit block 35;

[0139] A third limiting ring 37, the inner wall of which is fixedly connected to the outer wall of the limiting block 35, and the outer wall of which is rotatably connected to the inner wall of the mounting groove 22;

[0140] Among them, a plurality of the second movable holes 36 are arranged corresponding to a plurality of the first movable holes 23, a plurality of the connecting rods 25 respectively penetrate the plurality of the second movable holes 36, a plurality of the connecting rods 25 are provided with a limit plate 40 on the outer side wall facing one end of the driving structure, one end wall of the limit plate 40 is attached to the limit block 35, a third ring groove 38 for the third limit ring 37 to rotate is provided on the inner wall of the mounting groove 22, and a third rotating bearing 39 is provided between the bottom of the third ring groove 38 and the third limit ring 37;

[0141] By setting the limit block 35 and the second movable hole 36, the connecting rod 25 can move normally. By setting the limit plate 40, the connecting rod 25 can be prevented from moving away from the driving structure. By cooperating with the third limit ring 37 and the third ring groove 38, the limit block 35 can be prevented from moving left and right. By setting the third rotating bearing 39, the rotating block 21 can rotate better.

[0142] Embodiment 8:

[0143] In this embodiment, in addition to the structural features of the aforementioned embodiments, the further rotating structure includes a first bevel gear 41 disposed on the outer wall of the rotating block 21, a movable ring groove 42 disposed on the inner wall of the mounting groove 22 for the first bevel gear 41 to rotate, a through hole 43 disposed at the top of the mounting block 20 and connected to the movable ring groove 42, a second rotating motor 44 having a fixed end disposed at the top of the mounting block 20 and an output end connected to the through hole 43, and a second bevel gear 45 disposed at the rotating end of the second rotating motor 44, wherein the second bevel gear is meshed with the first bevel gear 41;

[0144] The first bevel gear 41 can be moved by the setting of the movable annular groove 42 , the rotation end of the second rotating motor 44 can be prevented by the setting of the through-hole 45 , and the rotating block 21 can be rotated by the cooperation between the first bevel gear 41 and the second bevel gear 45 .

[0145] Embodiment 9:

[0146] In this embodiment, in addition to the structural features of the above-mentioned embodiments, the clamping mechanism 18 further includes:

[0147] The mounting plate 46 is disposed on the top of the supporting plate 10;

[0148] A connecting plate 47, detachably connected to a side of the mounting plate 46 facing the grinding mechanism 17;

[0149] A plurality of hydraulic cylinders 48 are respectively arranged on the side of the connecting plate 47 facing the grinding mechanism 17, the fixed ends of the plurality of hydraulic cylinders 48 are respectively arranged in a circumferential direction with the central axis of the connecting plate 47, and the output ends respectively extend toward the central axis of the connecting plate 47;

[0150] A plurality of arc blocks 49 are respectively connected to the output ends of a plurality of hydraulic cylinders 48;

[0151] and a plurality of anti-slip pads 50, respectively connected to the inner wall and the outer wall of the arc-shaped block 49;

[0152] When the hydraulic cylinders 48 are extended, the arc blocks 49 are brought together to clamp the outer wall of the inner tube 1, and when the hydraulic cylinders 48 are retracted, the arc blocks 49 are separated from each other to clamp the inner wall of the inner tube 1.

[0153] By setting the mounting plate 46, the connecting plate 47 can be installed, and the detachable connection of the connecting plate 47 facilitates the operator to perform maintenance. By setting a plurality of hydraulic rods, the arc blocks 49 can be brought closer to or separated from each other, and the inner tube 1 can be clamped by the cooperation between the arc blocks 49 and the anti-slip pad 50.

[0154] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A production process for a high temperature resistant automobile exhaust flexible pipe, characterized in that: The production process is used to prepare the following automobile exhaust flexible pipe, which includes: Two inner tubes (1) are arranged at intervals; two ends of the telescopic joint (2) are respectively connected to opposite ends of the two inner tubes (1); The two ends of the bellows (3) are respectively connected to ends of the two inner tubes (1) which are away from each other; The protective outer net (4) is sleeved on the outside of the corrugated tube (3), and the two ends of the protective outer net (4) are sleeved on the two ends of the corrugated tube (3); and two ferrules (5) which are placed on both ends of the protective outer net (4); The bellows (3) is sleeved on the outside of the expansion joint (2), the ferrule (5) presses the bellows (3) and the protective outer net (4) onto the inner tube (1), and the ends of the bellows (3), the protective outer net (4) and the ferrule (5) are all connected to the outer wall of the inner tube (1) by welding; The inner tube (1) comprises: A small diameter portion (6), the two small diameter portions (6) of the two inner tubes (1) being arranged opposite to each other, and a step portion (7) being arranged at ends of the two small diameter portions (6) which are away from each other; and a large diameter portion (8) disposed at one end of the two step portions (7) that are away from each other; The expansion joint (2) is arranged on the outer side walls of the two small diameter parts (6), and the bellows (3) is arranged on the outer side walls of the two large diameter parts; The production process comprises the following steps: S1: firstly, the inner tube (1) is mounted on the clamping end of the grinding device (9), and then the inner wall and the outer wall of the inner tube (1) are ground by the grinding end of the grinding device (9); S2: placing the two ends of the telescopic joint (2) on the outer wall of the small diameter portion (6) respectively, and then welding the telescopic joint (2) and the small diameter portion (6); S3: placing the bellows (3) on both ends of the two large diameter parts, placing the protective outer net (4) on both ends of the large diameter parts, and the inner wall of the protective outer net (4) is attached to the outer wall of the bellows (3); S4: Put two ferrules (5) on both ends of the protective outer net (4), and then press the corrugated tube (3) and the protective outer net (4) onto the inner tube (1) using a crimping machine; S5: welding the end of the corrugated tube (3), the end of the protective outer net (4) and the end of the ferrule (5) to the outer wall of the inner tube (1); The grinding device (9) comprises: A support plate (10), wherein two support blocks (12) are arranged at intervals at the top end of the support plate (10) in the length direction; A connecting plate (13) is arranged between the two supporting blocks (12) and is located at one end of the two supporting blocks (12); A first rotating motor (11) is arranged on the support plate (10) between the two supporting blocks (12), and the first rotating motor (11) is located at one end of the two supporting blocks (12) away from the connecting plate (13); A threaded rod (14), one end of which is connected to the output end of the first rotating motor (11), and the other end of which is rotatably connected to the connecting plate (13); A moving block (15) is threadedly connected to the threaded rod (14); Two anti-rotation blocks (16), one end of which is respectively arranged on two sides of the moving block (15), and the other end of which slides on the two supporting blocks (12); A grinding mechanism (17) is arranged at the top of the moving block (15); and a clamping mechanism (18) is arranged at the top of the supporting plate (10), and the clamping mechanism (18) is located on a side of the connecting plate (13) away from the first rotating motor (11); Wherein, the two support blocks (12) are each provided with a sliding hole (19) for the anti-rotation block (16) to move, the clamping mechanism (18) is used to clamp the inner tube (1), and the grinding mechanism (17) is used to grind the outer wall and the inner wall of the inner tube; The grinding mechanism (17) comprises: A mounting block (20) is arranged at the top of the moving block (15), and a mounting groove (22) is provided on one end of the mounting block (20) facing the clamping mechanism (18); A rotating block (21), one end of which is rotatably connected to the mounting groove (22) and the other end of which extends out of the mounting groove (22), wherein the rotating block (21) is provided with a plurality of first moving holes (23) arranged in a circumferential direction around the central axis of the rotating block (21); A first limiting ring (24), the inner wall of which is connected to the outer wall of the rotating block, and the outer wall of which is rotatably connected to the inner wall of the mounting groove (22); A driving structure, rotatably connected to a side of the rotating block (21) facing the bottom of the mounting groove (22); A limiting structure, rotatably connected to the inner wall of the mounting groove (22), and the limiting structure is located between the rotating block (21) and the driving structure; A rotating structure, wherein the fixed end is arranged at the top of the mounting block (20), and the output end passes through the mounting groove (22) and is rotatably connected to the rotating block (21); A plurality of connecting rods (25), one end of which respectively passes through the plurality of moving holes, the limiting structure and is connected to the driving structure, and the other end of which is located outside the moving hole; and a plurality of grinding blocks (26) respectively connected to one end of the connecting rod (25) away from the moving hole; A first ring groove (27) for the first limiting ring (24) to rotate is provided on the inner wall of the installation groove (22); a first rotating bearing (28) is provided between the bottom of the first ring groove (27) and the first limiting ring (24); the driving structure is used to drive the connecting rod (25) to move in the moving hole; the limiting structure is used to prevent the connecting rod (25) from moving out of the driving structure; and the rotating structure is used to drive the rotating block (21) to rotate; The driving structure comprises: A driving motor (29), the fixed end of which is arranged at an end of the mounting block (20) away from the mounting groove (22), and the rotating end of which passes through the mounting block (20) and is connected to the mounting groove (22); A driving block (30) is connected to the rotating end of the driving motor (29) and is rotatably connected in the mounting groove (22). The driving block (30) is provided with a plurality of action grooves (32) arranged in a circumferential direction around the central axis of the driving block (30) on one end facing the limiting structure. and a second limiting ring (31), the inner wall of which is fixedly connected to the outer wall of the driving block (30), and the outer wall of which is rotatably connected to the inner wall of the mounting groove (22); The connecting rods (25) are respectively inserted into the action grooves (32) and abut against the bottom of the action grooves (32); a second ring groove (33) for the second limiting ring (31) to rotate is provided on the inner wall of the installation groove (22); a second rotating bearing (34) is provided between the bottom of the second ring groove (33) and the second limiting ring (31); and the action grooves (32) are used to drive the connecting rod to move in the moving hole.

2. The production process of a high temperature resistant automobile exhaust flexible pipe according to claim 1, characterized in that: The limiting structure comprises: A limit block (35) is rotatably connected to the inner wall of the mounting groove (22), and a plurality of second movable holes (36) are arranged in a circumferential direction around the central axis on the end of the limit block (35); A third limiting ring (37), the inner wall of which is fixedly connected to the outer wall of the limiting block (35), and the outer wall of which is rotatably connected to the inner wall of the mounting groove (22); Among them, a plurality of the second movable holes (36) are arranged corresponding to a plurality of the first movable holes (23), a plurality of the connecting rods (25) respectively penetrate the plurality of the second movable holes (36), a plurality of the connecting rods are provided with a limit plate (40) on the outer side wall of one end facing the driving structure, one end wall of the limit plate (40) is attached to the limit block (35), a third ring groove (38) for the third limit ring (37) to rotate is provided on the inner wall of the installation groove (22), and a third rotating bearing (39) is provided between the bottom of the third ring groove (38) and the third limit ring (37).

3. The production process of a high temperature resistant automobile exhaust flexible pipe according to claim 2, characterized in that: The rotating structure comprises a first bevel gear (41) arranged on the outer wall of the rotating block (21), a movable annular groove (42) arranged on the inner wall of the mounting groove (22) for the first bevel gear (41) to rotate, a through hole (43) arranged at the top end of the mounting block (20) and connected to the movable annular groove (42), a second rotating motor (44) having a fixed end arranged at the top end of the mounting block (20) and an output end connected to the through hole (43), and a second bevel gear (45) arranged at the rotating end of the second rotating motor (44), wherein the second bevel gear (45) meshes with the first bevel gear (41).

4. The production process of a high temperature resistant automobile exhaust flexible pipe according to claim 1, characterized in that: The clamping mechanism (18) comprises: A mounting plate (46) is disposed on the top of the support plate (10); A connecting plate (47) is detachably connected to a side of the mounting plate (46) facing the grinding mechanism (17); a plurality of hydraulic cylinders (48) are respectively arranged on the side of the connecting plate (47) facing the grinding mechanism (17); the fixed ends of the plurality of hydraulic cylinders (48) are respectively arranged in a circumferential direction with respect to the central axis of the connecting plate (47), and the output ends respectively extend toward the central axis of the connecting plate (47); A plurality of arc blocks (49) are respectively connected to the output ends of a plurality of hydraulic cylinders (48); and a plurality of anti-slip pads (50) respectively connected to the inner wall and the outer wall of the arc-shaped block (49); When the plurality of hydraulic cylinders (48) are extended, the plurality of arc blocks (49) are brought together to clamp the outer wall of the inner tube (1); and when the plurality of hydraulic cylinders (48) are retracted, the plurality of arc blocks (49) are separated from each other to clamp the inner wall of the inner tube (1).

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