CN218669528U - Low-stress exhaust pipe - Google Patents

Abstract

The application provides a low stress blast pipe relates to blast pipe technical field, including pipeline A, pipeline B and the pipeline C of butt joint in proper order, be equipped with three air inlet opening A on the pipeline A, be equipped with two air inlet opening B on the pipeline B, be equipped with air inlet opening C and exhaust opening on the pipeline C respectively. This application cancellation pipeline A and pipeline B outer wall's strengthening rib has solved the blast pipe that the temperature is low in the blast pipe and can pass through the high pipeline deformation of strengthening rib limiting temperature to make the blast pipe thermal stress rise, the problem that the fracture risk increases makes the blast pipe thermal stress decline to a certain extent, has promoted the life of blast pipe.

Description

Low-stress exhaust pipe

Technical Field

The application relates to the field of exhaust pipes, in particular to a low-stress exhaust pipe.

Background

The exhaust pipe is part of an engine exhaust system, which mainly comprises an exhaust manifold, an exhaust pipe and a muffler.

The traditional exhaust pipe has the specific structure that the pipelines are connected by the reinforcing ribs a, as shown in fig. 2 and 4, the exhaust condition of the exhaust pipe is different because the exhaust of the exhaust pipe is pulse-type (namely, the exhaust valve is opened to exhaust, and the exhaust valves between cylinders are opened in a certain sequence rather than simultaneously). Simultaneously because each air flue of blast pipe is heated the condition differently, in traditional design, the blast pipe that the temperature is low will be through strengthening rib a restriction high pipeline deformation of temperature to make the blast pipe thermal stress rise, the fracture risk increases.

Disclosure of Invention

In order to overcome current not enough, this application embodiment provides a low stress blast pipe, and it can solve the problem that the pipeline leads to the deformation risk to increase because of the strengthening rib in traditional design, makes the blast pipe thermal stress decline to a certain extent, has promoted the life of blast pipe.

The technical scheme adopted by the embodiment of the application for solving the technical problem is as follows: the utility model provides a low stress blast pipe, is including pipeline A, pipeline B and the pipeline C that docks in proper order, be equipped with three opening A that admits air on the pipeline A, be equipped with two opening B that admits air on the pipeline B, be equipped with respectively on the pipeline C and admit air opening C and exhaust opening.

Furthermore, two ends of the pipeline B are respectively butted and fixed with opposite ends of the pipeline A and the pipeline C through flanges.

Further, the wall thickness of the pipeline A to the pipeline C is gradually thickened.

Furthermore, it is three air inlet port A, two air inlet port B with air inlet port C is the design side by side.

Furthermore, the opening A of admitting air, two the opening B of admitting air with the port outer wall of the opening C of admitting air all is equipped with air intake flange portion, and all sets the bolt in the air intake flange portion.

Furthermore, rubber pads are adhered to the outer end faces of the air inlet flange portions.

Furthermore, the two sides of the pipeline B are provided with internal thread sleeves in pairs.

The embodiment of the application has the advantages that:

1. the strengthening rib of cancellation pipeline A and pipeline B outer wall has solved the blast pipe that the temperature is low in the blast pipe and can pass through the high pipeline deformation of strengthening rib restriction temperature to make the blast pipe thermal stress rise, the problem that the fracture risk increases makes the blast pipe thermal stress decline to a certain extent, has promoted the life of blast pipe.

2. Optimize the wall thickness of blast pipe, the blast pipe wall thickness is even before optimizing, optimizes the back then the blast pipe wall thickness by pipeline A to pipeline C thickening gradually, and the flange portion that admits air promptly collects the department to the air flue and thickens gradually, because the blast pipe air flue collects the department heat big, consequently collects thickening wall thickness and makes the blast pipe temperature field more even, does benefit to the probability that reduces blast pipe deformation.

Drawings

FIG. 1 is a perspective view of the optimized structure of the present application;

FIG. 2 is a perspective view of the structure of the present application before optimization;

FIG. 3 is a plan view of the optimized structure of the present application;

fig. 4 is a plan view of the structure of the present application before optimization.

In the figure: 1-line a; 101-air inlet port A; 2-line B; 201-air inlet port B; 3-line C; 301-air inlet port C; 302-exhaust port; a-reinforcing ribs.

Detailed Description

Technical scheme in the embodiment of this application for solve in the traditional design pipeline because of the strengthening rib leads to the problem that the deformation risk increases, the general thinking is as follows:

example (b):

referring to fig. 1-4, a low stress exhaust pipe includes a pipeline A1, a pipeline B2 and a pipeline C3, which are connected in sequence, wherein the pipeline A1 is integrally provided with three air inlet ports a101, the pipeline B2 is integrally provided with two air inlet ports B201, and the pipeline C3 is integrally provided with an air inlet port C301 and an exhaust port 302. Wherein: as shown in fig. 2 and 4, before optimization, the outer walls of the pipeline A1 and the pipeline B2 are both provided with the reinforcing ribs a, but the exhaust pipe with low temperature in the exhaust pipe can limit the deformation of the pipeline with high temperature through the reinforcing ribs a, so that the thermal stress of the exhaust pipe is increased, and the cracking risk is increased; after optimization, the reinforcing ribs a on the outer walls of the pipeline A1 and the pipeline B2 are eliminated, so that the problems caused by the above are solved, the thermal stress of the exhaust pipe is reduced, and the service life of the exhaust pipe is prolonged.

And two ends of the pipeline B2 are respectively butted and fixed with the opposite ends of the pipeline A1 and the pipeline C3 through flanges. The pipeline A1, the pipeline B2 and the pipeline C3 can be combined and fixed by using the flange to form the exhaust pipe.

The wall thickness of the pipelines A1 to C3 is gradually thickened. Wherein, before optimizing exhaust pipe wall thickness even, optimize the back then exhaust pipe wall thickness by pipeline A1 to pipeline C3 thickening gradually, intake flange portion collects the department thickening gradually to the air flue promptly, because the exhaust pipe air flue collects the department heat big, consequently collects thickening wall thickness and makes the exhaust pipe temperature field more even, does benefit to the probability that reduces the exhaust pipe deformation.

Three opening A101 that admits air, two ports B201 that admit air and the opening C301 that admits air are the design side by side to correspond the intercommunication with external mounted position, conveniently draw gas.

The port outer wall of the air inlet port A101, the two air inlet ports B201 and the air inlet port C301 is provided with an air inlet flange part, and the air inlet flange part is provided with a bolt. Wherein, it can be fixed with external treating the mounted position to run through air intake flange portion with the bolt, can fix the blast pipe.

Rubber pads are adhered to the outer end faces of the air inlet flange portions. Wherein, the design of rubber pad makes the flange portion of admitting air better with the laminating compactness of treating the mounted position, reduces the probability that blast pipe air inlet position took place to leak gas.

The two sides of the pipeline B2 are provided with internal thread sleeves in pairs. Wherein, the same external fastener such as a screw is screwed into the internal thread sleeve and is continuously screwed to be fixed with the butted position to be installed, thereby further strengthening the installation stability of the exhaust pipe.

In addition, before optimization, the exhaust pipe is cracked 3120 times through cold and hot impact, namely, the pipeline B2 is cracked; 8000 times of cold and hot impact, no cracking failure.

The working principle is as follows:

the gas led out by the external power equipment enters from the air inlet port A101, the air inlet port B201 and the air inlet port C301 which correspond to the pipeline A1, the pipeline B2 and the pipeline C3 respectively and then is gathered to the exhaust port 302 together for being discharged. Before the exhaust pipe is used, reinforcing ribs a on the outer walls of the pipeline A1 and the pipeline B2 are eliminated, so that the problems that the exhaust pipe with low temperature in the exhaust pipe limits the deformation of a pipeline with high temperature through the reinforcing ribs a, the thermal stress of the exhaust pipe is increased, and the cracking risk is increased are solved; the wall thickness of blast pipe has been optimized simultaneously, and the blast pipe wall thickness is even before optimizing, and then the blast pipe wall thickness is thickened gradually by pipeline A1 to pipeline C3 after optimizing, and the flange portion that admits air collects the department and thickens gradually to the air flue promptly, because the blast pipe air flue collects the department heat big, consequently collects thickening wall thickness and makes the blast pipe temperature field more even, does benefit to the probability that reduces the blast pipe deformation.

Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.

Claims (7)

1. The utility model provides a low stress blast pipe, its characterized in that, is including pipeline A (1), pipeline B (2) and pipeline C (3) that dock in proper order, be equipped with three air inlet port A (101) on pipeline A (1), be equipped with two air inlet port B (201) on pipeline B (2), be equipped with air inlet port C (301) and exhaust port (302) on pipeline C (3) respectively.

2. The low stress exhaust pipe of claim 1 wherein the ends of said pipe B (2) are flange-mounted to opposite ends of said pipe a (1) and said pipe C (3).

3. The low stress exhaust pipe of claim 1 wherein the wall thickness of the pipe a (1) to the pipe C (3) is gradually increased.

4. The low stress exhaust pipe of claim 1 wherein three of the intake ports a (101), two of the intake ports B (201), and the intake ports C (301) are all designed side-by-side.

5. The low-stress exhaust pipe according to claim 1, wherein the inlet port a (101), the two inlet ports B (201), and the inlet port C (301) have inlet flange portions on the outer walls of the ports, and bolts are provided on the inlet flange portions.

6. The low stress exhaust pipe of claim 1 wherein a rubber pad is bonded to the outer end surface of the inlet flange portion.

7. The low stress exhaust pipe of claim 1 wherein said pipe B (2) is threaded on both sides in pairs.

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