CN217142245U

CN217142245U - Multilayer exhaust pipe assembly

Info

Publication number: CN217142245U
Application number: CN202220863427.4U
Authority: CN
Inventors: 梁振杰
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-09
Anticipated expiration: 2032-04-14

Abstract

The utility model discloses a multilayer exhaust pipe assembly, including the blast pipe body, the blast pipe body includes that the inlayer casts wall and outer wall of casting, the inlayer is cast and is equipped with the intermediate layer cavity between wall and the outer wall of casting, the inlayer is cast and is equipped with the multiunit rest block in the intermediate layer cavity between wall and the outer wall of casting, the outer process through-hole that is equipped with at least two sets of symmetrical arrangement that casts on the wall, the inlayer is cast the wall and the outer both ends of casting the wall and is connected with the flange structure, still include with the block structure of process through-hole looks adaptation. The utility model relates to a multilayer exhaust pipe component, belonging to the exhaust pipe technical field, which has low casting cost, good heat preservation performance and beautiful design; the whole multi-layer exhaust pipe assembly base body is high in tensile strength due to the adoption of a ductile iron material; the manufacturing is simple, the integral molding pouring is realized, and the structural rigidity is good.

Description

Multilayer exhaust pipe assembly

Technical Field

The utility model relates to an exhaust pipe technique, more specifically say, it relates to a multilayer exhaust pipe subassembly.

Background

Diesel engines with the national emission requirements of six require that the outer surface of an exhaust gas exhaust pipe is coated with a heat insulating material so as to ensure the minimum temperature required by the action of each unit (such as a catalytic muffler and the like) of an external purifying device, at present, a scheme that stainless steel is coated with a heat insulating material such as heat insulating cotton or high silica cloth is mostly adopted, and the stainless steel is riveted or welded. The scheme is more convenient for the casting and forming of the exhaust pipe, but the overall appearance color value and the reliability after the heat insulation material is wrapped are poor, and the cost is higher if the stainless steel is blanked by mould pressing.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to some not enough of the above-mentioned of prior art, the utility model aims at providing a multilayer exhaust pipe subassembly.

In order to realize the above-mentioned purpose, the utility model provides a multilayer exhaust pipe assembly, including the blast pipe body, the blast pipe body includes that the inlayer casts wall and outer wall of casting, the inlayer is cast and is equipped with the intermediate layer cavity between wall and the outer wall of casting, the inlayer is cast and is equipped with the multiunit rest block in the intermediate layer cavity between wall and the outer wall of casting, the outer wall of casting is equipped with the technology through-hole of at least two sets of symmetrical arrangement, the both ends that the wall was cast to inlayer and outer wall of casting are connected with the flange structure, still include with the jam structure of technology through-hole looks adaptation.

Furthermore, each group of the supporting blocks is provided with four supporting blocks, and the four supporting blocks are uniformly arranged between the inner-layer cast wall and the outer-layer cast wall in the circumferential direction.

Furthermore, the inner-layer casting wall and the outer-layer casting wall respectively comprise two straight sections arranged at two ends and two continuous bending sections arranged between the two straight sections, and the axial leads of the inner-layer casting wall and the outer-layer casting wall are positioned on the same plane; four groups of supporting blocks are arranged between the inner layer casting wall and the outer layer casting wall, and the four groups of supporting blocks are respectively arranged on two straight sections and two continuous bending sections of the inner layer casting wall and the outer layer casting wall.

Further, the blocking structure is a bowl-shaped plug.

Furthermore, the flange structure at one end is a square flange, and a plurality of uniformly arranged mounting holes are formed in the edge of the square flange.

Furthermore, the flange structure at one end and the other end is a circular conical surface structure.

Furthermore, the inner layer casting wall, the outer layer casting wall, the supporting block and the process through hole are of an integrally cast structure.

Advantageous effects

Compared with the prior art, the utility model discloses a beneficial effect of multilayer exhaust pipe subassembly and manufacturing method as follows: the multi-layer exhaust pipe assembly of the utility model has the advantages of low casting cost, good heat preservation effect and beautiful design of the multi-layer exhaust pipe; the whole multi-layer exhaust pipe assembly base body is high in tensile strength due to the adoption of a ductile iron material; the manufacturing is simple, the integral molding pouring is realized, and the structural rigidity is good.

Drawings

FIG. 1 is a front view of the multi-layer exhaust duct assembly of the present invention;

FIG. 2 is a left side view of the structure of the multi-layer exhaust pipe assembly of the present invention;

FIG. 3 is a right side view of the construction of the multi-layer exhaust duct assembly of the present invention;

FIG. 4 is a top view of the multi-layer exhaust duct assembly of the present invention;

FIG. 5 is a sectional view of the structure taken along line A-A in FIG. 4;

FIG. 6 is a sectional view of the structure taken along the line B-B in FIG. 1;

FIG. 7 is a sectional view of the structure taken along the line C-C in FIG. 1;

FIG. 8 is a sectional view of the structure taken along line D-D of FIG. 1;

fig. 9 is a structural sectional view in the direction E-E in fig. 1.

In the figure: 1. an inner layer casting wall; 2. casting the outer wall; 3. an interlayer cavity; 4. a support block; 5. a through-process hole; 6. a flange structure; 7. a blocking structure; 8. and (7) installing holes.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

The specific implementation manner of the utility model is as follows: as shown in fig. 1 to 9, a multilayer exhaust pipe assembly comprises an exhaust pipe body, wherein the exhaust pipe body comprises an inner casting wall 1 and an outer casting wall 2, an interlayer cavity 3 is arranged between the inner casting wall 1 and the outer casting wall 2, a plurality of groups of supporting blocks 4 are arranged in the interlayer cavity 3 between the inner casting wall 1 and the outer casting wall 2, at least two groups of symmetrically arranged process through holes 5 are arranged on the outer casting wall 2, and both ends of the inner casting wall 1 and the outer casting wall 2 are connected with flange structures 6 and a blocking structure 7 matched with the process through holes 5.

In this multilayer exhaust pipe subassembly, the blast pipe adopts the nodular iron material casting to take shape, be a pipe that has two-layer cast wall structure, both ends adopt flange structure 6 to seal the intermediate layer cavity 3 between the cast wall 1 of inlayer and the cast wall 2 of skin, the cast wall 1 of inlayer and the cast wall 2 of skin at middle part support through four groups of circular

shape rest blocks

4, and 4 through-holes are opened out in the middle part position of the cast wall 2 of skin, the finished product state adopts the calathiform stopper to carry out the shutoff, be used for the support to middle psammitolite during casting, also be convenient for subsequent sand removal and perfusion fluid.

After the multi-layer exhaust pipe is processed, a heat insulation material fluid, such as a thick body prepared from pottery clay, can be poured in, and heated to a certain temperature to form a heat insulation solid with high internal porosity, and the surface of the outer casting wall 2 can be used after being sprayed with high-temperature-resistant paint. The casting wall can be designed to be thin and uniform by the material and the structure, the casting can be solidified at all times, the hardness uniformity is improved, the strength of the matrix material is high, and the high-temperature resistance is good.

In the present embodiment, there are four support blocks 4 in each set, and four support blocks 4 are uniformly arranged in the circumferential direction between the inner casting wall 1 and the outer casting wall 2.

In this embodiment, the inner casting wall 1 and the outer casting wall 2 each include two straight sections disposed at two ends and two continuous curved sections disposed between the two straight sections, and the axial leads of the inner casting wall 1 and the outer casting wall 2 are located on the same plane; four groups of supporting blocks 4 are arranged between the inner-layer casting wall 1 and the outer-layer casting wall 2, and the four groups of supporting blocks 4 are respectively arranged on two straight sections and two continuous bending sections of the inner-layer casting wall 1 and the outer-layer casting wall 2.

In this embodiment, the plug structure 7 is a bowl-shaped plug, the flange structure 6 at one end is a square flange, and the edge of the square flange is provided with a plurality of uniformly arranged mounting holes 8. The flange structure 6 at one end of the exhaust pipe is made into a square flange and is provided with a mounting hole 8, and the flange structure 6 at the other end is arranged into a circular conical surface structure for assembly.

In the present embodiment, the inner casting wall 1, the outer casting wall 2, the supporting block 4 and the through-hole 5 are integrally cast.

A method of manufacturing a multilayer exhaust pipe assembly comprising the steps of: firstly, an upper die and a lower die which are adaptive to the outer wall of the outer layer casting wall are arranged, then two arc-shaped sand cores which are adaptive to the interlayer cavity are arranged, then process hole sand cores for supporting the two arc-shaped sand cores are arranged on the upper die and the lower die, an inner hole sand core which is adaptive to the inner wall of the inner layer casting wall is arranged between the two arc-shaped sand cores, and supporting holes which are adaptive to a plurality of supporting blocks are arranged on the arc-shaped sand cores; after the arc-shaped sand core, the fabrication hole sand core and the inner hole sand core are arranged between the upper die and the lower die, the upper die and the lower die are closed to obtain a multilayer exhaust pipe through pouring; after stripping, flange structures are welded at two ends of the multilayer exhaust pipe to plug the interlayer cavity. The casting method can realize the integral casting molding of the inner-layer casting wall 1, the outer-layer casting wall 2, the supporting block 4 and the process through hole 5.

In this embodiment, set up the constant head tank at the both ends of lower mould and support the both ends of hole psammitolite.

The above is only a preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility of the invention and the utility of the patent.

Claims

1. The utility model provides a multilayer exhaust pipe assembly, includes the exhaust pipe body, its characterized in that, the exhaust pipe body includes that the inlayer casts wall (1) and outer cast wall (2), the inlayer casts and is equipped with intermediate layer cavity (3) between wall (2) with outer cast wall (1), the inlayer is cast and is equipped with multiunit rest block (4) in intermediate layer cavity (3) between wall (2) with outer cast wall (1), be equipped with at least two sets of symmetrical arrangement's technology through-hole (5) on outer cast wall (2), the both ends that the wall (2) were cast to inlayer (1) and outer cast wall (2) are connected with flange structure (6), still include with jam structure (7) of technology through-hole (5) looks adaptation.

2. A multi-layer exhaust pipe assembly according to claim 1, wherein there are four of said support blocks (4) in each set, and four of said support blocks (4) are circumferentially uniformly arranged between said inner cast wall (1) and said outer cast wall (2).

3. A multi-layer exhaust pipe assembly according to claim 2, wherein the inner cast wall (1) and the outer cast wall (2) each comprise two straight sections at both ends and two continuous curved sections between the two straight sections, and the axial leads of the inner cast wall (1) and the outer cast wall (2) are located on the same plane; four groups of supporting blocks (4) are arranged between the inner-layer casting wall (1) and the outer-layer casting wall (2), and the four groups of supporting blocks (4) are respectively arranged on two straight sections and two continuous bending sections of the inner-layer casting wall (1) and the outer-layer casting wall (2).

4. A multilayer exhaust pipe assembly according to claim 3, characterized in that the plugging structure (7) is a bowl plug.

5. A multilayer exhaust pipe assembly according to claim 3, characterized in that the flange structure (6) at one end is a square flange, the edge of which is provided with a plurality of evenly arranged mounting holes (8).

6. A multilayer exhaust pipe assembly according to claim 5, characterized in that the flange structure (6) at the other end is provided as a circular cone structure.

7. A multi-layer exhaust pipe assembly according to claim 1, wherein the inner cast wall (1) is of one-piece cast construction with the outer cast wall (2), the support block (4) and the through-process holes (5).