Leak-proof exhaust pipe sealing ring

Abstract

The utility model provides a leakproof exhaust pipe sealing ring which comprises an inner ring body, a first connecting ring, a middle ring body, a second connecting ring and an outer ring body, the first connecting ring is arranged at one end of the inner ring body, and the middle ring body is arranged on the side face of the first connecting ring. According to the leakproof exhaust pipe sealing ring, through mutual cooperation of the inner ring body, the first connecting ring, the middle ring body, the second connecting ring, the outer ring body and other structures, when the leakproof exhaust pipe sealing ring is used, the first section of exhaust pipe is inserted into the outer side face of the inner ring body, the second section of exhaust pipe is inserted into the outer side face of the middle ring body, and the outer ring body wraps the outer side of the second section of exhaust pipe; the middle ring body wraps the outer side of the first section of the exhaust pipe to form a multi-layer sealing structure, the design changes the limitation of single-layer sealing of a traditional sealing ring, gas can be more effectively prevented from leaking from a connector of the exhaust pipe, the sealing effect is greatly improved, and the actual use requirement is better met.

Description

TECHNICAL FIELD

[0001] The utility model relates to exhaust pipe sealing technical field especially relates to a kind of exhaust pipe sealing ring of anti-leakage. BACKGROUND

[0002] In the complex working system of multi-cylinder engine, the exhaust pipe as a key component, undertakes the important task of discharging exhaust gas. The monolithic exhaust pipe used in the early stage, when dealing with the huge thermal stress generated during engine operation, is not up to the task. Due to the lack of effective thermal stress release mechanism, the exhaust pipe is prone to deformation under high temperature and continuous working pressure. This deformation not only changes the original shape of the exhaust pipe, affecting the smooth discharge of exhaust gas, but also may cause damage to the surrounding components such as exhaust pipe gasket, thereby triggering a series of faults, shortening the service life of the engine and related components, increasing maintenance cost and downtime.

[0003] In view of the various disadvantages of monolithic exhaust pipe, sectional exhaust pipe has emerged and gradually become the mainstream choice. The interface between sectional exhaust pipe is usually designed with clearance fit, which has a profound consideration. On the one hand, appropriate clearance can ensure the smooth assembly of exhaust pipe, reduce assembly difficulty and improve production efficiency; on the other hand, it also takes into account the thermal expansion of exhaust pipe during engine operation, preventing excessive extrusion of the interface due to thermal expansion and avoiding damage to the exhaust pipe due to sintering.

[0004] However, the design of sectional exhaust pipe interface clearance is like dancing on a steel wire, which requires precise control. If the interface clearance is too small, although it can reduce the risk of gas leakage to some extent, the exhaust pipe will expand due to heat during engine operation, and the interface will generate a lot of stress due to insufficient space, which is easy to cause sintering problem and affect the normal work of exhaust pipe. If the interface clearance is too large, it will also lead to serious gas leakage. Exhaust gas leakage from the large clearance will disturb the normal combustion process of the engine, making the combustion of the mixture incomplete, and thus leading to the decrease of engine power output and significant reduction of performance. At the same time, incomplete combustion will also produce more harmful substances, making the engine emissions worse, not meeting the increasingly stringent environmental protection requirements.

[0005] In order to solve the sealing problem of the segmented exhaust pipe interface, people think of installing a sealing ring at the interface. But the existing exhaust pipe sealing ring on the market is mostly a single circular structure. When installing, the worker needs to carefully put the sealing ring on the outside of one of the exhaust pipes that need to be spliced, and then put the other exhaust pipe on the outside of the sealing ring to complete the splicing and installation of the two exhaust pipes. However, the single circular structure of the sealing ring has obvious defects in actual use. It can only play a single layer sealing role between the two exhaust pipes. In the face of complex engine working environment and high temperature and high pressure exhaust gas impact, single layer sealing is difficult to effectively block the leakage of exhaust gas, and the sealing effect is not ideal, which cannot well meet the high requirements of the engine on the sealing performance of the exhaust pipe.

[0006] Therefore, it is necessary to provide a leak-proof exhaust pipe sealing ring to solve the above technical problems. Content of the utility model

[0007] In order to overcome the technical defects existing in the prior art, the utility model provides a leak-proof exhaust pipe sealing ring.

[0008] The technical solution adopted by the utility model is: including inner ring body, first connecting ring, middle ring body, second connecting ring and outer ring body, the first connecting ring is arranged at one end of the inner ring body, the middle ring body is arranged at the side surface of the first connecting ring, the second connecting ring is arranged at one end of the middle ring body, and the outer ring body is arranged at the side surface of the second connecting ring.

[0009] Preferably, the inner part of the end of the inner ring body away from the first connecting ring and the inner part of the end of the outer ring body away from the second connecting ring are both provided with elastic rings.

[0010] Preferably, the outer side surface of the inner ring body, the inner side surface and the outer side surface of the middle ring body and the inner side surface of the outer ring body are all provided with a plurality of extrusion rings and guide rings.

[0011] Preferably, the inner part of the plurality of extrusion rings is provided with a cavity.

[0012] Preferably, the inner side surface of the plurality of extrusion rings and the inner side surface of the guide ring are on the same plane, and one side of the guide ring is provided with a guide surface.

[0013] Preferably, the outer side surface of the inner ring body away from the end of the first connecting ring is provided with a first inclined surface.

[0014] Preferably, the outer side surface of the middle ring body away from the end of the second connecting ring is provided with a second inclined surface.

[0015] Preferably, the middle ring body is arranged on the outer side surface of the inner ring body, and the outer ring body is arranged on the outer side surface of the middle ring body.

[0016] The utility model discloses a beneficial effect is: the utility model provides a kind of exhaust pipe sealing ring of anti-leakage, through the mutual cooperation of inner ring body, first connecting ring, middle ring body, second connecting ring and outer ring body etc., first section exhaust pipe is inserted into the outside of inner ring body when using, second section exhaust pipe is inserted into the outside of middle ring body, so that outer ring body is wrapped in the outside of second section exhaust pipe, middle ring body is wrapped in the outside of first section exhaust pipe, forms multilayer sealing structure, this design changes the limitation of traditional sealing ring single layer sealing, can more effectively prevent gas from exhaust pipe interface leakage, greatly improve sealing effect, better satisfy actual use demand. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model provides a kind of exhaust pipe sealing ring of anti-leakage structure schematic view;

[0018] Figure 2 For Figure 1 Another view structure schematic view shown in figure;

[0019] Figure 3 For Figure 1 Section structure schematic view shown in figure;

[0020] Figure 4 For Figure 3 Partial enlarged schematic view shown in figure;

[0021] Figure 5 For Figure 4 Elastic ring solid structure schematic view shown in figure;

[0022] Figure 6 The utility model provides a kind of exhaust pipe sealing ring of anti-leakage and exhaust pipe installation structure schematic view.

[0023] Reference signs explanation: in drawing: 1, inner ring body, 11, first inclined surface, 2, first connecting ring, 3, middle ring body, 31, second inclined surface, 4, second connecting ring, 5, outer ring body, 6, elastic ring, 7, guide ring, 8, extrusion ring, 9, cavity. DETAILED DESCRIPTION

[0024] The utility model is further described below in connection with the drawings:

[0025] As shown in the figure, the embodiment provides a kind of exhaust pipe sealing ring of anti-leakage, including: inner ring body 1, first connecting ring 2, middle ring body 3, second connecting ring 4 and outer ring body 5, the first connecting ring 2 is set to one end of the inner ring body 1, the middle ring body 3 is set to the side of the first connecting ring 2, the second connecting ring 4 is set to one end of the middle ring body 3, the outer ring body 5 is set to the side of the second connecting ring 4;

[0026] The middle ring body 3 is disposed on the outer side of the inner ring body 1, and the outer ring body 5 is disposed on the outer side of the middle ring body 3.

[0027] The inner ring 1, the first connecting ring 2, the middle ring 3, the second connecting ring 4, and the outer ring 5 are made in one piece. The inner ring 1, the first connecting ring 2, the middle ring 3, the second connecting ring 4, and the outer ring 5 can be made of silicone rubber or fluororubber. By fixing one end of the inner ring 1 to the first connecting ring 2, fixing the side of the first connecting ring 2 to the middle ring 3, fixing one end of the middle ring 3 to the second connecting ring 4, and fixing the side of the second connecting ring 4 to the outer ring 5, a multi-layer ring structure is formed.

[0028] Both the inner ring 1, which is away from the first connecting ring 2, and the outer ring 5, which is away from the second connecting ring 4, are provided with elastic rings 6.

[0029] Elastic rings 6 are embedded in the inner ring 1 at the end away from the first connecting ring 2 and in the outer ring 5 at the end away from the second connecting ring 4, respectively. The elastic rings 6 are made of highly elastic spring steel and have a circular or rectangular cross-section. They produce good elastic deformation when compressed, thereby increasing the sealing performance of the outer ring 5 wrapped around the outer side of the second exhaust pipe and the sealing performance of the inner ring 1 and the inner side of the first exhaust pipe.

[0030] Multiple extrusion rings 8 and guide rings 7 are provided on the outer side of the inner ring body 1, the inner and outer sides of the middle ring body 3, and the inner side of the outer ring body 5.

[0031] Each of the multiple extrusion rings 8 has a cavity 9 inside.

[0032] The inner surfaces of the plurality of extrusion rings 8 and the inner surfaces of the guide rings 7 are on the same plane, and a guide surface is provided on one side of the guide rings 7.

[0033] Please see the appendix Figure 3 As shown, multiple extrusion rings 8 are provided on the sides of the inner ring body 1, the middle ring body 3 and the outer ring body 5, while only one guide ring 7 is provided. The inner sides of the guide ring 7 and the extrusion ring 8 are set on the same plane, and a guide surface is provided on one side of the guide ring 7, so that the exhaust pipe can slide along the guide surface and the extrusion ring 8 can be smoothly wrapped around the outer side of the exhaust pipe.

[0034] A cavity 9 is provided inside each extrusion ring 8. The cavity 9 is cylindrical, elliptical, or square. With the cavity 9, there is enough space for elastic contraction and deformation when the extrusion ring 8 is squeezed by the exhaust pipe. When the exhaust pipe is inserted, the inner wall of the extrusion ring 8 is subjected to radial pressure, the volume of the cavity 9 decreases, the extrusion ring 8 expands outward and fits tightly against the surface of the exhaust pipe, forming a more uniform sealing pressure distribution.

[0035] The outer side of the inner ring body 1 is provided with a first inclined surface 21 away from one end of the first connecting ring 2.

[0036] The outer side of the middle ring body 3 is provided with a second inclined surface 31 away from one end of the second connecting ring 4.

[0037] The first inclined surface 11, the second inclined surface 31 and the guide surface of the guide ring 7 play an important guiding role in the installation process of the exhaust pipe, so that the exhaust pipe can be smoothly inserted into the sealing ring, the difficulty and time of installation are reduced, and the installation efficiency is improved; the design of the guide structure can also ensure that the exhaust pipe maintains coaxiality during insertion, avoiding the problem of poor sealing caused by installation deviation.

[0038] The working principle of the anti-leakage exhaust pipe sealing ring provided by the utility model is as follows:

[0039] When in use, the first section of exhaust pipe is inserted from one end of the inner ring body 1 with the first inclined surface 11, the first inclined surface 11 can play a guiding role, so that the first section of exhaust pipe can be more smoothly sleeved on the outer side of the inner ring body 1, then the second section of exhaust pipe is inserted from one end of the middle ring body 3 with the second inclined surface 31, the second inclined surface 31 also plays a guiding role, so that the second section of exhaust pipe is smoothly sleeved on the outer side of the inner ring body 3, and at the same time, the outer ring body 5 is sleeved on the outer side of the second section of exhaust pipe, and the middle ring body 3 is sleeved on the outer side of the first section of exhaust pipe;

[0040] In this process, the guide ring 7 arranged on the outer side of the inner ring body 1, the inner side and the outer side of the middle ring body 3 and the inner side of the outer ring body 5 can further assist the insertion of the exhaust pipe, so that the installation is more convenient, when the exhaust pipe is inserted, the extrusion ring 8 is extruded by the exhaust pipe, since the cavities 9 are arranged in the interiors of the plurality of extrusion rings 8, the cavities 9 are deformed by contraction when being extruded, so that a large elastic force is generated, and the exhaust pipe surface is tightly adhered, at the same time, the elastic ring 6 arranged in the interiors of the inner ring body 1 away from one end of the first connecting ring 2 and the outer ring body 5 away from one end of the second connecting ring 4 also elastically deforms when being extruded, so that the tightness between the sealing ring and the exhaust pipe is further enhanced.

[0041] The design of the multi-layer structure makes the inner ring body 1 and the first section of exhaust pipe, the middle ring body 3 and the first section of exhaust pipe and the second section of exhaust pipe, and the outer ring body 5 and the second section of exhaust pipe form a multi-layer sealing structure after installation, so that gas leakage is effectively prevented.

[0042] Compared with the related art, the anti-leakage exhaust pipe sealing ring has the following beneficial effects:

[0043] Through mutual cooperation of the inner ring body 1, the first connecting ring 2, the middle ring body 3, the second connecting ring 4 and the outer ring body 5, in use, the first section of exhaust pipe is inserted into the outer side surface of the inner ring body 1, the second section of exhaust pipe is inserted into the outer side surface of the middle ring body 3, the outer ring body 5 is wrapped outside the second section of exhaust pipe, and the middle ring body 3 is wrapped outside the first section of exhaust pipe, thereby forming a multi-layer sealing structure. The design changes the limitation of the traditional single-layer sealing of the sealing ring, can more effectively prevent gas from leaking from the exhaust pipe interface, greatly improves the sealing effect, and better meets the actual use requirement.

[0044] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and the person skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed, and the scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A leak-proof exhaust pipe sealing ring, comprising an inner ring body (1), a first connecting ring (2), a middle ring body (3), a second connecting ring (4), and an outer ring body (5), characterized in that: The first connecting ring (2) is disposed at one end of the inner ring body (1), the middle ring body (3) is disposed on the side of the first connecting ring (2), the second connecting ring (4) is disposed at one end of the middle ring body (3), and the outer ring body (5) is disposed on the side of the second connecting ring (4).

2. The leak-proof exhaust pipe sealing ring according to claim 1, characterized in that, Both the inner ring body (1) at the end away from the first connecting ring (2) and the outer ring body (5) at the end away from the second connecting ring (4) are provided with elastic rings (6).

3. The leak-proof exhaust pipe sealing ring according to claim 1, characterized in that, Multiple extrusion rings (8) and guide rings (7) are provided on the outer side of the inner ring body (1), the inner and outer sides of the middle ring body (3), and the inner side of the outer ring body (5).

4. The leak-proof exhaust pipe sealing ring according to claim 3, characterized in that, Each of the extrusion rings (8) has a cavity (9) inside.

5. A leak-proof exhaust pipe sealing ring according to claim 3, characterized in that, The inner surfaces of the multiple extrusion rings (8) and the inner surfaces of the guide rings (7) are on the same plane, and a guide surface is provided on one side of the guide rings (7).

6. A leak-proof exhaust pipe sealing ring according to claim 1, characterized in that, The outer side of the inner ring (1) is provided with a first inclined surface (11) at the end away from the first connecting ring (2).

7. A leak-proof exhaust pipe sealing ring according to claim 6, characterized in that, The outer side of the middle ring (3) away from the second connecting ring (4) is provided with a second inclined surface (31).

8. The leak-proof exhaust pipe sealing ring according to claim 1, characterized in that: The middle ring body (3) is disposed on the outer side of the inner ring body (1), and the outer ring body (5) is disposed on the outer side of the middle ring body (3).

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