Exhaust pipe, exhaust device and vehicle

Abstract

The utility model relates to an exhaust pipe, an exhaust device and a vehicle. The airtight shell is arranged in the hose, and at least part of the airtight shell abuts against the interior of the hose; and the connecting piece is arranged at the end parts of the hose and the airtight shell. Based on the design, the hose and the airtight shell have certain flexibility and can adapt to tiny relative movement between the engine and other parts of the exhaust device, so that the operation, installation and maintenance of the vehicle are simpler and more convenient. Due to the fact that the airtight shell and the hose directly abut against each other, continuous damping can be generated in the vehicle running process, self-excitation is reduced, and vibration of a whole exhaust system and road bumping are flexibly buffered through the product. And the exhaust pipe can protect other parts in the exhaust system. In addition, due to reduction of vibration, noise in the whole exhaust process can be reduced.

Description

Technical Field

[0001] This application relates to the field of exhaust pipes, and particularly to an exhaust pipe, an exhaust device, and a vehicle. Background Art

[0002] As a symbol of modern civilized society, vehicles are an integral part of today's society; they are a convenient and practical means of transportation; they provide convenience for people's production and life and play an important role in social and economic development.

[0003] A metal hose is a high-quality flexible pipe in modern industrial pipelines. Exhaust pipes used in vehicles usually require the use of metal hoses. The flexibility of the metal hose can reduce the damage to rigid connection components in the system caused by engine vibration and road bumps, and at the same time, it is also convenient for installation and reduces noise. Utility Model Content

[0004] The purpose of this application is to provide an exhaust pipe, an exhaust device, and a vehicle.

[0005] According to the first aspect of the embodiments of this application, an exhaust pipe is provided, and the exhaust pipe includes:

[0006] A hose;

[0007] An airtight shell, the airtight shell is disposed inside the hose, and at least a part of the airtight shell is in contact with the inside of the hose;

[0008] A connector, the connector is disposed at the ends of the hose and the airtight shell.

[0009] In some embodiments, the airtight shell includes a plurality of annularly arranged corrugated rings, and the plurality of corrugated rings are arranged along the axial direction of the exhaust pipe;

[0010] The corrugated ring includes a U-shaped groove, the U-shaped groove is recessed towards the central axis of the exhaust pipe, the U-shaped groove includes symmetrically connected first and second groove walls, and the first groove wall of each corrugated ring is hermetically and fixedly connected to the second groove wall of an adjacent corrugated ring;

[0011] The ends of the first and second groove walls away from the central axis of the exhaust pipe serve as the outer walls of the corrugated ring, and at least a part of the outer walls is in contact with the hose.

[0012] In some embodiments, the airtight shell further includes a contact wall, the contact wall is connected to the outer wall, and at least a part of the contact wall is in contact with the hose.

[0013] In some embodiments, the first groove wall includes a first wall unit and a second wall unit connected to each other, the second groove wall includes a third wall unit and a fourth wall unit connected to each other, the first wall unit and the third wall unit are symmetrically arranged along the center line of the U-shaped groove, and the second wall unit and the fourth wall unit are symmetrically arranged along the center line of the U-shaped groove;

[0014] The distance between the first wall unit and the third wall unit is greater than the distance between the second wall unit and the fourth wall unit.

[0015] In some embodiments, the distance between the first wall unit and the third wall unit is greater than or equal to 3 mm and less than or equal to 5 mm; the distance between the second wall unit and the fourth wall unit is greater than or equal to 1.5 mm and less than or equal to 2.5 mm.

[0016] In some embodiments, the texture circles are arranged in a spiral pattern along the length direction.

[0017] In some embodiments, the hose is composed of a tube wall, and the tube wall includes a first buckle portion and a second buckle portion. The first buckle portion and the second buckle portion are overlapped along the thickness direction of the tube wall. The first buckle portion includes a first installation space and a first installation wall, and the second buckle portion includes a second installation space and a second installation wall;

[0018] The first installation wall is installed in the second installation space, and the second installation wall. The first installation wall can move along the length direction of the second installation space, and the second installation wall can move along the first installation space.

[0019] In some embodiments, the hose is composed of a tube wall, and the tube wall includes a first buckle portion and a second buckle portion. The first buckle portion includes a first installation space, a first installation wall, and a first blocking wall. The second buckle portion includes a second installation space, a second installation wall, and a second blocking wall. The first blocking wall and the second blocking wall are connected along the length direction of the hose. The first buckle portion is arranged above the second buckle portion along the thickness direction of the tube wall;

[0020] The tube wall is annularly arranged to form a ring. The first installation wall of the ring is installed in the second installation space of the previous ring, and the second installation wall of the ring is installed in the first installation space of the next ring. The first installation wall can move along the length direction of the second installation space, and the second installation wall can move along the first installation space.

[0021] In some embodiments, the rings are arranged in a spiral pattern along the length direction.

[0022] In some embodiments, the connecting member includes an outer ring and a joint. The outer ring is sleeved on the outer circumference of the hose and fixedly connected to the outer circumference of the hose, and the joint is fixedly arranged with the outer ring.

[0023] In some embodiments, the outer ring includes a second ring unit close to the joint and a first ring unit far from the joint. The inner diameter of the first ring unit is larger than that of the second ring unit, and the inner diameter of the first ring unit gradually increases along the central axis direction of the exhaust pipe from near the second ring unit.

[0024] In some embodiments, the joint includes a first head unit and a second head unit. The first head unit and the second head unit are connected at a right angle, and the first head unit is fixedly arranged with the first ring unit;

[0025] The airtight shell has an air passage space inside. The joint is arranged at the end of the airtight shell, and the joint is annular and encloses a gas passage space. The air passage space and the gas passage space are connected and arranged;

[0026] The exhaust pipe further includes a guide ring. One end of the guide ring is fixedly connected to the second head unit, and the other end of the guide ring extends into the airtight shell.

[0027] In some embodiments, the guide ring includes a first guide unit connected to the second head unit and a second guide unit extending into the airtight shell. The first guide unit and the second guide unit are connected along the length direction of the exhaust pipe;

[0028] The diameter of the second guide unit gradually decreases along the central axis direction of the exhaust pipe from the first guide unit.

[0029] In some embodiments, the length that the guide ring extends into the airtight shell is greater than or equal to 5 mm and less than or equal to 20 mm.

[0030] In some embodiments, the exhaust pipe further includes a heat insulation layer, and the heat insulation layer is wrapped outside the hose.

[0031] In some embodiments, the exhaust pipe further includes a fixing member. The fixing member covers the outside of the heat insulation layer and is connected to the connecting member. The fixing member fixes the heat insulation layer outside the hose.

[0032] In some embodiments, the fixing member includes a fixing head and a mesh part connected to each other. The fixing head is fixed to the connecting member, and the mesh part covers the outside of the heat insulation layer.

[0033] In some embodiments, the cross-section of the airtight shell is circular, the cross-section of the hose is oval, and the short diameter of the cross-section of the hose abuts against the cross-section of the airtight shell.

[0034] In some embodiments, the airtight shell is arranged to abut against the inside of the hose along the length direction.

[0035] According to the second aspect of the embodiments of the present application, an exhaust device is provided, including the exhaust pipe as described in any one of the above embodiments.

[0036] According to the third aspect of the embodiments of the present application, a vehicle is provided, including the exhaust device as described in the above embodiments.

[0037] The beneficial technical effects brought by the technical solutions provided by the embodiments of the present application are:

[0038] In the present application, by providing a hose, an airtight shell and a connector. At the same time, the airtight shell is arranged inside the hose, and at least part of the airtight shell is arranged to abut against the hose. Based on the above design, since both the hose and the airtight shell can be stretched and deformed, they have a certain degree of flexibility and can adapt to the small relative movement between the engine and other components of the exhaust device, making the operation, installation and maintenance of the vehicle more convenient. Because the airtight shell and the hose are directly in contact with each other, continuous damping can be generated during the driving of the vehicle, thereby reducing the occurrence of self-excitation of the product, and further protecting other components in the exhaust system by buffering the engine vibration and road bumps. In addition, due to the reduction of vibration, the noise during the entire exhaust process can be reduced. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 It is a schematic structural diagram of an exhaust pipe shown according to an embodiment of the present application.

[0041] Figure 2 It is a schematic structural diagram of the exhaust pipe from another angle shown according to an embodiment of the present application.

[0042] Figure 3 It is a schematic cross-sectional view of an exhaust pipe shown according to an embodiment of the present application.

[0043] Figure 4 It is a schematic cross-sectional view of the exhaust pipe from another angle shown according to an embodiment of the present application.

[0044] Figure 5 Schematic diagram of the cooperation of a hose, an airtight housing, and a connector according to an embodiment of the present application.

[0045] Figure 6 Schematic diagram of the structure of an airtight housing according to an embodiment of the present application.

[0046] Figure 7 Partial cross-sectional structure schematic diagram of an airtight housing according to an embodiment of the present application.

[0047] Figure 8 Partial cross-sectional structure schematic diagram of another airtight housing according to an embodiment of the present application.

[0048] Figure 9 Schematic diagram of the structure of a hose according to an embodiment of the present application.

[0049] Figure 10 Partial cross-sectional structure schematic diagram of an airtight housing according to an embodiment of the present application.

[0050] Figure 11 Partial cross-sectional structure schematic diagram of another airtight housing according to an embodiment of the present application.

[0051] Figure 12 Schematic diagram of the structure of a connector according to an embodiment of the present application.

[0052] Figure 13 Partial structure schematic diagram of a connector according to an embodiment of the present application.

[0053] Explanation of reference numerals:

[0054] Exhaust pipe 10

[0055] Hose 100

[0056] Pipe wall 110

[0057] First buckle portion 120

[0058] First installation space 121

[0059] First installation wall 122

[0060] First blocking wall 123

[0061] Second buckle portion 130

[0062] Second installation space 131

[0063] Second installation wall 132

[0064] Second blocking wall 133

[0065] Loop 140

[0066] Hermetic housing 200

[0067] Ripple ring 210

[0068] U-shaped groove 220

[0069] First groove wall 221

[0070] First wall unit 221A

[0071] Second wall unit 221B

[0072] Second groove wall 222

[0073] Third wall unit 222A

[0074] Fourth wall unit 222B

[0075] Outer wall 223

[0076] Contact wall 224

[0077] Compression space 230

[0078] Ventilation space 240

[0079] Connector 300

[0080] Outer ring 310

[0081] First ring unit 311

[0082] Second ring unit 312

[0083] Joint 320

[0084] First head unit 321

[0085] Second head unit 322

[0086] Gas passage space 323

[0087] Flow guide ring 330

[0088] First flow guide unit 331

[0089] Second flow guide unit 332 Detailed implementation mode

[0090] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. The use of the word "a" or "an" and the like in the specification and claims of the present application does not denote a limitation of quantity, but rather means that there is at least one. "Plurality" means two or more. Words such as "comprising" or "including" and the like are intended to cover the elements or items appearing before "comprising" or "including" and their equivalents that appear after the listed elements or items, and do not exclude other elements or items. "Connection" or "coupling" and the like are not limited to direct connection, and may also include indirect connection. Words such as "upper" and / or "lower" are for convenience of description only and are not limited to one position or a spatial orientation. The singular forms "a" and "the" used in the specification and appended claims of the present application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0091] As a symbol of modern civilized society, vehicles are an integral part of today's society; they are a convenient and practical means of transportation; they provide convenience for people's production and life and play an important role in social and economic development. However, they have serious negative externalities. The exhaust gas emitted by vehicles causes serious harm to the atmosphere and humans and is the main source of air pollution.

[0092] In order to purify the exhaust gas, many vehicles are equipped with an exhaust device to process the exhaust gas, and the exhaust device and the vehicle are often connected by an exhaust pipe 10. The exhaust pipe 10 is used to provide flexible connection to ensure that components of the exhaust device will not cause stress concentration or damage due to thermal expansion and contraction, engine displacement, road surface bumps, etc., and to protect the exhaust system from damage.

[0093] The present application provides an exhaust pipe 10. Referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 as shown, the exhaust pipe 10 includes: a hose 100, an airtight shell 200, and a connector 300. The airtight shell 200 is disposed inside the hose 100, and at least a part of the airtight shell 200 is in contact with the inside of the hose 100; the connector 300 is disposed at the ends of the hose 100 and the airtight shell 200.

[0094] It should be noted that at least part of the airtight shell 200 is arranged in contact with the hose 100. By setting the cross-section of the airtight shell 200 to be circular and the cross-section of the hose 100 to be elliptical, the short diameter part of the cross-section of the hose 100 is in contact with the cross-section of the airtight shell 200. In this setting, the airtight shell 200 is arranged in contact with the inner wall of the hose 100 along the length direction. In addition, the cross-section of the hose 100 can be set to be circular and the cross-section of the airtight shell 200 can be set to be triangular, so that the three corners of the cross-section of the airtight shell 200 are in contact with the cross-section of the hose 100. The above only provides examples of some implementation manners. As long as at least part of the airtight shell 200 is arranged in contact with the hose 100, it should be within the protection scope of this embodiment. In addition, the hose 100 and the airtight shell 200 are generally made of metal, such as copper, steel, etc.

[0095] Based on the above design, since both the hose 100 and the airtight shell 200 can be stretched and deformed and have a certain flexibility, they can adapt to the small relative movement between the engine and other components of the exhaust device, making the operation, installation and maintenance of the vehicle more convenient. Because the airtight shell 200 and the hose 100 are directly arranged in contact, continuous damping can be generated during the driving of the vehicle, thereby reducing the occurrence of self-excitation of the product, and further the exhaust pipe 10 can protect other components in the exhaust system. In addition, due to the reduction of vibration, the noise during the entire exhaust process can be reduced. It should also be noted that, referring Figure 5 as shown, the contact part between the airtight shell 200 and the hose 100 is often thicker and is not easily damaged to the airtightness of the pipe body of the airtight shell 200, thereby providing a generally higher service life and higher wear resistance to the exhaust pipe 10.

[0096] In this embodiment, referring Figure 5 、 Figure 6 and Figure 7 , the airtight shell 200 includes a plurality of annularly arranged corrugated rings 210, and the plurality of corrugated rings 210 are arranged along the axial direction of the exhaust pipe 10; the corrugated ring 210 includes a U-shaped groove 220, the U-shaped groove 220 is recessed towards the central axis direction of the exhaust pipe 10, the U-shaped groove 220 includes symmetrically connected first groove wall 221 and second groove wall 222, and the ends of the first groove wall 221 and the second groove wall 222 away from the central axis of the exhaust pipe 10 serve as the outer wall 223 of the corrugated ring 210, and at least part of the outer wall 223 is arranged in contact with the hose 100; the first groove wall 221 of each corrugated ring 210 is hermetically and fixedly connected to the second groove wall 222 of an adjacent corrugated ring 210. It should be noted that the corrugated ring 210 here is not a complete ring, but is directly formed by spirally winding a U-shaped groove 220 and continuously welding the outer edges, so the corrugated rings are arranged in a spiral pattern along the length direction. This setting can ensure the airtightness of the airtight shell 200.

[0097] Since the first groove wall 221 of each coil 210 is hermetically and fixedly connected to the second groove wall 222 of an adjacent coil 210, the airtight housing 200 is in a sealed state, thus realizing the functions of waterproofing and smoke prevention for the airtight housing 200, that is, realizing the functions of airtightness and liquid tightness. Moreover, since both the first groove wall 221 and the second groove wall 222 are in direct contact with the hose 100, a better-implemented continuous damping effect can be provided, and further the function of reducing the resonance occurrence of the product itself can be realized.

[0098] In this embodiment, referring to Figure 7 as shown, the airtight housing 200 further includes a contact wall 224. The contact wall 224 is connected to the outer wall 223, and at least part of the contact wall 224 is arranged in contact with the hose 100. Among them, in Figure 7 , the contact wall 224 and the outer wall 223 are jointly arranged in contact with the hose 100.

[0099] Based on the above settings, the contact wall 224 and the outer wall 223 are jointly arranged in contact with the hose 100, thereby obtaining greater friction, improving strength, and optimizing the stress distribution on the corrugations. In addition, referring to Figure 7 as shown, the contact wall 224 can be formed by folding the outer wall 223 downward. In the case of folding formation, the folding area is arranged in contact with the hose 100.

[0100] Referring to Figure 8 as shown, the contact wall 224 is arranged alone in contact with the hose 100. In this setting, the airtight housing 200 and the hose 100 are arranged in contact with each other through the contact wall 224. Therefore, wear between the hose 100 and the airtight housing 200 can be prevented, thereby improving the overall service life of the exhaust pipe 10.

[0101] In this embodiment, continuing to refer to Figure 7 as shown, a compression space 230 is formed between the first groove wall 221 and the second groove wall 222. The contact wall 224 is arranged in the compression space 230, and the wall surface of the contact wall 224 is arranged in contact with the first groove wall 221 and the second groove wall 222.

[0102] This compression space 230 can, on the one hand, realize the contraction and expansion of the airtight housing 200, and on the other hand, absorb the thermal expansion and contraction caused by the temperature change of the medium inside the airtight housing 200 and the metal fatigue caused by expansion and contraction, thereby protecting the pipeline system from excessive stress caused by thermal expansion and contraction and metal fatigue.

[0103] In this embodiment, referring to Figure 7As shown, the first groove wall 221 includes a first wall unit 221A and a second wall unit 221B that are connected to each other, and the second groove wall 222 includes a third wall unit 222A and a fourth wall unit 222B that are connected to each other. The first wall unit 221A and the third wall unit 222A are symmetrically arranged along the center line of the U-shaped groove 220, and the second wall unit 221B and the fourth wall unit 222B are symmetrically arranged along the center line of the U-shaped groove 220. The distance between the first wall unit 221A and the third wall unit 222A is greater than the distance between the second wall unit 221B and the fourth wall unit 222B.

[0104] Based on the above settings, referring to Figure 7 As shown, the external opening of the airtight shell 200 is large and the internal opening is small. This design enables the pipe to receive additional support from the outside when under external pressure, dispersing the pressure and preventing the pipe from being flattened or deformed, thereby improving the pressure-bearing capacity of the pipe. In addition, the shape with a large outer and small inner enhances the lateral stiffness and stability of the pipe wall, making the pipe more resistant to distortion during installation and deformation during long-term use, and maintaining the shape and position of the pipe unchanged.

[0105] It should be noted that the distance between the first wall unit 221A and the third wall unit 222A is greater than or equal to 3 mm and less than or equal to 5 mm. For example, the distance between the first wall unit 221A and the third wall unit 222A can be 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm. In addition, the distance between the second wall unit 221B and the fourth wall unit 222B is greater than or equal to 1.5 mm and less than or equal to 2.5 mm. For example, the distance between the second wall unit 221B and the fourth wall unit 222B can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm.

[0106] In addition, referring to Figure 5 As shown, the first wall unit 221A and the third wall unit 222A are fixedly connected, and the first wall unit 221A and the third wall unit 222A are in contact and friction with the hose 100. Since the lengths of the first wall unit 221A and the third wall unit 222A are long enough, the friction between the hose 100 and the airtight shell 200 will not easily damage the sealing performance of the airtight shell 200, thereby making the airtight shell 200 have higher durability. In contrast, if the hose 100 and the airtight shell 200 are reversed in the inner and outer order, the inner wall of the airtight shell 200 will directly generate friction with the hose 100, and the sealing performance of the airtight shell 200 will be directly damaged after the inner wall of the airtight shell 200 is worn. In the embodiment of the present application, arranging the airtight shell 200 inside the hose 100 can enable the exhaust pipe 10 to obtain continuous damping while also having high durability.

[0107] In one embodiment, referring to Figure 9 and Figure 10 As shown, the hose 100 is composed of a pipe wall 110, and the pipe wall 110 includes a first buckle portion 120 and a second buckle portion 130. The first buckle portion 120 includes a first installation space 121, a first installation wall 122, and a first blocking wall 123. The second buckle portion 130 includes a second installation space 131, a second installation wall 132, and a second blocking wall 133. The first blocking wall 123 and the second blocking wall 133 are connected along the length direction of the hose 100. The first buckle portion 120 is arranged above the second buckle portion 130 along the thickness direction of the pipe wall 110. The pipe wall 110 is circularly arranged to form a loop 140. The first installation wall 122 of the loop 140 is installed in the second installation space 131 of the upper loop 140, and the second installation wall 132 of the loop 140 is installed in the first installation space 121 of the lower loop 140. The first installation wall 122 can move along the length direction of the second installation space 131, and the second installation wall 132 can move along the first installation space 121. It should be noted that the loop 140 here is not a complete circle, but is directly formed by spirally winding a pipe wall 110. Therefore, the loop 140 is arranged in a spiral along the length direction, and this arrangement can ensure the integrity and durability of the hose 100.

[0108] Through the above arrangement, the hose 100 can be stretched or compressed along its length direction, so as to provide a flexible connection. During the driving of the vehicle, the length can be adjusted according to different vibration amplitudes. In addition, stress concentration caused by thermal expansion and contraction or engine displacement can be avoided.

[0109] In another embodiment, referring to Figure 11 As shown, the hose 100 is composed of a pipe wall 110, and the pipe wall 110 includes a first buckle portion 120 and a second buckle portion 130. The first buckle portion 120 and the second buckle portion 130 are arranged overlappingly along the thickness direction of the pipe wall 110. The first buckle portion 120 includes a first installation space 121 and a first installation wall 122, and the second buckle portion 130 includes a second installation space 131 and a second installation wall 132. The first installation wall 122 is installed in the second installation space 131, and the second installation wall 132 is installed in the first installation space 121. The first installation wall 122 can move along the length direction of the second installation space 131, and the second installation wall 132 can move along the first installation space 121. In this embodiment, only the overlapping arrangement of the first buckle portion 120 and the second buckle portion 130 is adopted, which can reduce the processing process and save the processing cost.

[0110] In one embodiment, referring to Figure 5 , Figure 12 and Figure 13As shown, the connecting member 300 includes a connected outer ring 310 and a joint 320. The outer ring 310 is sleeved on the outer circumference of the hose 100 and fixedly connected to the outer circumference of the hose 100. The joint 320 is fixedly arranged with the outer ring 310. Among them, the joint 320 and the outer ring 310 are fixed by welding.

[0111] By fixing the outer ring 310 to the outer circumference, the connecting member 300 is fixed to the ends of the hose 100 and the airtight housing 200. Since the airtight housing 200 is arranged inside the hose 100, fixedly connecting the connecting member 300 to the outer circumference of the hose 100 can wrap the airtight housing 200, thereby achieving better sealing performance.

[0112] In this embodiment, continue to refer to Figure 5 、 Figure 12 and Figure 13 As shown, the outer ring 310 includes a second ring unit 312 close to the joint 320 and a first ring unit 311 far from the joint 320. The inner diameter of the first ring unit 311 is set to be larger than that of the second ring unit 312, and the inner diameter of the first ring unit 311 gradually increases along the central axis direction of the exhaust pipe 10 from being close to the second ring unit 312.

[0113] Based on the above settings, the assembly and use processes can be made smoother and easier, avoiding forced stretching or damage to the connecting member 300 or the exhaust pipe 10. In addition, the gradually increasing design helps to better fit exhaust pipes 10 with different diameters, achieving a good sealing effect through tight fitting to prevent gas leakage. The gradually increasing design can use auxiliary materials such as gaskets and sealants to ensure the airtightness of the connection.

[0114] In this embodiment, refer to Figure 4 、 Figure 5 、 Figure 12 and Figure 13As shown, the joint 320 includes a first head unit 321 and a second head unit 322, which are connected at a right angle between the first head unit 321 and the second head unit 322. The first head unit 321 is fixedly arranged with the first ring unit 311. There is a ventilation space 240 inside the airtight shell 200. The joint 320 is arranged at the end of the airtight shell 200, and the joint 320 is annularly arranged and encloses a gas passing space 323. The ventilation space 240 and the gas passing space 323 are connected and communicated. The exhaust pipe 10 further includes a flow guiding ring 330. One end of the flow guiding ring 330 is fixedly connected to the second head unit 322, and the other end of the flow guiding ring 330 extends into the airtight shell 200. It should be noted that the length of the flow guiding ring 330 extending into the airtight shell 200 is greater than or equal to 5 mm and less than or equal to 20 mm. For example, the length of the flow guiding ring 330 extending into the airtight shell 200 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm.

[0115] The flow guiding ring 330 can effectively guide the flow direction of the exhausted tail gas, ensuring that the tail gas flows in a predetermined direction when flowing through the exhaust system. In addition, the flow guiding ring 330 can accelerate the heat dissipation, avoid local overheating, protect the exhaust device material from heat damage, and also help to avoid urea crystallization.

[0116] In this embodiment, referring to Figure 5 , Figure 12 and Figure 13 As shown, the flow guiding ring 330 includes a first flow guiding unit 331 connected to the second head unit 322 and a second flow guiding unit 332 extending into the airtight shell 200. The first flow guiding unit 331 and the second flow guiding unit 332 are connected along the length direction of the exhaust pipe 10. The diameter of the second flow guiding unit 332 gradually decreases along the central axis direction of the exhaust pipe 10 from the first flow guiding unit 331.

[0117] With such a setting, on the one hand, it is convenient for the flow guiding ring 330 to be installed into the joint 320 and the airtight shell 200. On the other hand, the generation of turbulence can be significantly reduced, thereby reducing the noise caused by turbulence.

[0118] In one embodiment, the exhaust pipe 10 further includes a heat insulating layer (not shown in the figure), and the heat insulating layer is wrapped outside the hose 100. It should be noted that the heat insulating layer in this embodiment can be directly adhered to the outside of the hose 100, or the heat insulating layer itself has a fixing part that cooperates with the hose 100, so that it can be directly fixed to the outside of the hose 100. In this embodiment, the exhaust pipe 10 may further include a fixing member (not shown in the figure), and the fixing member covers the outside of the heat insulating layer and is connected to the connecting member 300. The fixing member fixes the heat insulating layer to the outside of the hose 100.

[0119] With such an arrangement, on the one hand, it can effectively isolate high temperature, prevent scalding when personnel touch it, and at the same time reduce the risk of damage to other vehicle components due to thermal radiation. On the other hand, by reducing the heat loss of the exhaust pipe to the surrounding environment, the temperature of the exhaust system can be maintained to a certain extent, which helps to maintain the thermal efficiency of the engine. In addition, the heat insulation layer can also protect the exhaust pipe 10 and slow down the impact of the exhaust pipe 10 by foreign objects such as stones.

[0120] In this embodiment, the fixing member includes a fixing head (not shown in the figure) and a mesh portion (not shown in the figure) that are connected to each other. The fixing head is fixed to the connecting member 300, and the mesh portion covers the outside of the heat insulation layer.

[0121] The mesh portion can ensure that the heat insulation layer closely adheres to the surface of the exhaust pipe and is not easily detached or displaced even in a high-temperature vibration environment, improving the durability and reliability of the heat insulation effect. In addition, the mesh structure itself can also provide certain physical protection for the heat insulation layer, preventing damage to the fragile heat insulation material caused by external impact or friction, thereby extending the service life.

[0122] This application also proposes an exhaust device, which includes the exhaust pipe 10 in the above embodiment, that is, the exhaust device has the functions and advantages of the above exhaust pipe 10.

[0123] In addition, this application also proposes a vehicle, and the exhaust device includes the exhaust device in the above embodiment. The types of this vehicle can include transport trucks, mining trucks, heavy handling vehicles, construction machinery, passenger cars, and agricultural machinery, etc.

Claims

1. An exhaust pipe, characterized in that: The exhaust pipe comprises: hose; An airtight shell, the airtight shell is arranged in the hose, and at least a part of the airtight shell is arranged to conflict with the inside of the hose; A connecting piece is arranged at the ends of the hose and the airtight shell.

2. The exhaust pipe according to claim 1, characterized in that The airtight shell includes a plurality of annularly arranged grooves, and the plurality of grooves are arranged along the axial direction of the exhaust pipe; The groove ring includes a U-shaped groove, the U-shaped groove is recessed toward the central axis direction of the exhaust pipe, the U-shaped groove includes a first groove wall and a second groove wall that are symmetrically connected, and the first groove wall of each groove ring is sealed and fixedly connected to the second groove wall of another adjacent groove ring; One end of the first groove wall and the second groove wall away from the central axis of the exhaust pipe serves as the outer wall of the groove ring, and at least a part of the outer wall is arranged to be in conflict with the hose.

3. The exhaust pipe according to claim 2, characterized in that The airtight shell further comprises a contact wall, the contact wall is connected to the outer wall, and at least a part of the contact wall is disposed in conflict with the hose.

4. The exhaust pipe according to claim 2, characterized in that The first groove wall comprises a first wall unit and a second wall unit connected to each other, the second groove wall comprises a third wall unit and a fourth wall unit connected to each other, the first wall unit and the third wall unit are symmetrically arranged along the center line of the U-shaped groove, and the second wall unit and the fourth wall unit are symmetrically arranged along the center line of the U-shaped groove; A distance between the first wall unit and the third wall unit is greater than a distance between the second wall unit and the fourth wall unit.

5. The exhaust pipe according to claim 4, characterized in that The distance between the first wall unit and the third wall unit is greater than or equal to 3 mm and less than or equal to 5 mm; the distance between the second wall unit and the fourth wall unit is greater than or equal to 1.5 mm and less than or equal to 2.5 mm.

6. The exhaust pipe according to claim 2, characterized in that The grooves are arranged in a spiral pattern along the length direction.

7. The exhaust pipe according to claim 1, characterized in that The hose is formed by a tube wall, and the tube wall includes a first buckle portion and a second buckle portion, the first buckle portion and the second buckle portion are overlapped along the thickness direction of the tube wall, the first buckle portion includes a first installation space and a first installation wall, and the second buckle portion includes a second installation space and a second installation wall; The first installation wall is installed in the second installation space, and the second installation wall is movable along the length direction of the second installation space, and the second installation wall is movable along the first installation space.

8. The exhaust pipe according to claim 1, characterized in that The hose is formed by a tube wall, and the tube wall includes a first buckle portion and a second buckle portion, the first buckle portion includes a first installation space, a first installation wall and a first blocking wall, the second buckle portion includes a second installation space, a second installation wall and a second blocking wall, and the first blocking wall and the second blocking wall are connected and arranged along the length direction of the hose, and the first buckle portion is arranged above the second buckle portion along the thickness direction of the tube wall; The tube wall is arranged in a ring shape to form a ring, the first mounting wall of the ring is installed in the second mounting space of the previous ring, and the second mounting wall of the ring is installed in the first mounting space of the next ring, and the first mounting wall can move along the length direction of the second mounting space, and the second mounting wall can move along the first mounting space.

9. The exhaust pipe according to claim 8, characterized in that The rings are arranged in a spiral arrangement along the length direction.

10. The exhaust pipe according to claim 1, characterized in that The connecting piece comprises an outer ring and a joint. The outer ring is sleeved on the outer ring of the hose and fixedly connected to the outer ring of the hose. The joint is fixedly arranged with the outer ring.

11. The exhaust pipe according to claim 10, characterized in that The outer ring includes a second ring unit close to the joint and a first ring unit far from the joint. The inner diameter of the first ring unit is larger than the inner diameter of the second ring unit, and the inner diameter of the first ring unit gradually increases from close to the second ring unit along the central axis direction of the exhaust pipe.

12. The exhaust pipe according to claim 11, characterized in that The joint comprises a first head unit and a second head unit, the first head unit and the second head unit are connected at a right angle, and the first head unit is fixedly arranged with the first ring unit; The airtight shell has a ventilation space inside, the joint is arranged at the end of the airtight shell, and the joint is arranged in a ring shape to enclose a gas passage space, and the ventilation space and the gas passage space are arranged in communication; The exhaust pipe further includes a guide ring, one end of which is fixedly connected to the second head unit, and the other end of which extends to the interior of the airtight shell.

13. The exhaust pipe according to claim 12, characterized in that The guide ring includes a first guide unit connected to the second head unit and a second guide unit extending into the airtight shell, and the first guide unit and the second guide unit are connected along the length direction of the exhaust pipe; The diameter of the second air guide unit is gradually reduced from the first air guide unit toward the central axis direction of the exhaust pipe.

14. The exhaust pipe according to claim 12, characterized in that The length of the guide ring extending to the inside of the airtight shell is greater than or equal to 5 mm and less than or equal to 20 mm.

15. The exhaust pipe according to claim 1, characterized in that The exhaust pipe further comprises a heat insulating layer, and the heat insulating layer is wrapped around the outside of the hose.

16. The exhaust pipe according to claim 15, characterized in that The exhaust pipe also includes a fixing member, which covers the outside of the heat insulating layer and is connected to the connecting member, and the fixing member fixes the heat insulating layer to the outside of the hose.

17. The exhaust pipe according to claim 16, characterized in that The fixing member comprises a fixing head and a mesh portion which are connected to each other. The fixing head is fixed to the connecting member, and the mesh portion is covered on the outside of the heat insulation layer.

18. The exhaust pipe according to claim 1, characterized in that The cross section of the airtight shell is circular, the cross section of the hose is elliptical, and the short diameter of the cross section of the hose conflicts with the cross section of the airtight shell.

19. The exhaust pipe according to claim 1, characterized in that The airtight shell is disposed in conflict with the interior of the hose along the length direction.

20. An exhaust device, characterized in that: Comprising the exhaust pipe as described in any one of claims 1-19.

21. A vehicle, characterized in that: Comprising the exhaust device as claimed in claim 20.

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