CN214330740U

CN214330740U - Exhaust pipe for diesel engine

Info

Publication number: CN214330740U
Application number: CN202120584983.3U
Authority: CN
Inventors: 李宇伟
Original assignee: Jiangyin Tongfang Machinery Parts Manufacturing Co ltd
Current assignee: Jiangyin Tongfang Machinery Parts Manufacturing Co ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-10-01
Anticipated expiration: 2031-03-23

Abstract

The utility model relates to an exhaust pipe for a diesel engine, which comprises an exhaust main pipe, a pipe divider and a plurality of exhaust branch pipes; one end of the exhaust main pipe is provided with a first flange connecting seat, the bottom of the first flange connecting seat is inwards concave and provided with a first mounting groove, and a first filter screen is arranged on the first mounting groove; the exhaust main pipe is provided with a corrugated pipe by welding; the other end of the exhaust main pipe is provided with a second flange connecting seat, and a second mounting groove is formed in the second flange connecting seat in an inwards recessed mode; one end of the pipe divider is provided with a third flange connecting seat matched with the second flange connecting seat, and the third flange connecting seat is inwards sunken to be provided with a third mounting groove matched with the second mounting groove; the pipe divider is connected to a second flange connecting seat on the exhaust main pipe through a third flange connecting seat; the second mounting groove and the third mounting groove form a mounting space, and a filter device is arranged in the mounting space. The utility model provides a pair of blast pipe for diesel engine has shock-absorbing function, improves the fastness and the leakproofness of pipe connection.

Description

Exhaust pipe for diesel engine

Technical Field

The utility model relates to a technical field, especially a blast pipe for diesel engine are made to the blast pipe.

Background

The exhaust pipe is a part of an engine exhaust system, the exhaust system mainly comprises an exhaust manifold, an exhaust pipe and a silencer, a three-calibration catalyst for controlling the emission of pollutants of the engine is generally arranged in the exhaust system, the exhaust pipe generally comprises a front exhaust pipe and a rear exhaust pipe, and the exhaust pipe is divided into a back pressure exhaust pipe, a half back pressure pipe, a straight pipe, a half straight pipe and a variable exhaust pipe.

Exhaust pipes are installed at exhaust ports of engine cylinders to exhaust gas after combustion of a mixture gas in the engine cylinders. The exhaust pipe is connected to the engine block and collects exhaust gas from the cylinders and guides the collected exhaust gas to an exhaust manifold. The connection of current diesel engine blast pipe branch pipe and house steward is generally direct through flange joint, and is not hard up easily under the effect of gas resistance, and pipeline sealing nature is not good, and cylinder exhaust gas has high temperature, and expend with heat and contract with cold the effect can make the pipeline life-span reduce to general blast pipe does not have the processing apparatus to gas, and a large amount of smoke and dust that contain in the exhaust gas can cause the pollution to the air. The utility model discloses a chinese utility model patent that bulletin number is CN208347890U discloses a tractor diesel engine's blast pipe structure, including the exhaust manifold, the first connecting pipe of one end fixedly connected with of exhaust manifold, the first ring flange of outer wall fixedly connected with of exhaust manifold one end, the one end of exhaust manifold is connected with the pipe divider, the pipe divider includes upper tube and low pipeline, be equipped with the cavity in the pipe wall of low tube, one side of low tube is equipped with the inlet tube, the opposite side of low tube is equipped with the outlet pipe, the inside of low tube is equipped with the filter screen, be equipped with the filter pulp in the filter screen, the outside cover of second connecting pipe is equipped with exhaust branch, the equal fixedly connected with second ring flange of outer wall at exhaust branch both ends. The first connecting pipe and the second connecting pipe are arranged, so that the firmness and the tightness of the pipeline connection are improved; the discharged gas is cooled by using water, so that the effects of expansion with heat and contraction with cold are reduced, and the service life of the pipeline is prolonged; by arranging the filter screen and the filter cotton, the smoke content of the exhaust gas is reduced, and the pollution to the environment is reduced. However, the exhaust pipe structure does not solve the problem of vibration damping, and the cooling water pipe structure is only provided at one end of the tube divider, so that the cooling effect is not preferable.

In view of the above problems, it is desirable to provide an exhaust pipe for a diesel engine.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a blast pipe for diesel engine has shock-absorbing function, can improve the fastness and the leakproofness of pipe connection.

In order to achieve the purpose of the utility model, the exhaust pipe for the diesel engine comprises an exhaust main pipe, a pipe divider and a plurality of exhaust branch pipes;

a first flange connecting seat is arranged at one end of the exhaust main pipe, a first mounting groove is concavely formed in the bottom of the first flange connecting seat, and a first filter screen is arranged on the first mounting groove; the exhaust main pipe is provided with a corrugated pipe through welding; the other end of the exhaust main pipe is provided with a second flange connecting seat, and a second mounting groove is formed in the second flange connecting seat in an inwards recessed mode;

one end of the pipe divider is provided with a third flange connecting seat matched with the second flange connecting seat, and the third flange connecting seat is inwards sunken to be provided with a third mounting groove matched with the second mounting groove; the pipe divider is connected to a second flange connecting seat on the exhaust main pipe through a third flange connecting seat; the second mounting groove and the third mounting groove form a mounting space, a filter device is arranged in the mounting space, the filter device comprises two second filter screens, springs are arranged on corners of the two second filter screens, and the two second filter screens are connected through the springs; the other end of the pipe divider is provided with a plurality of connectors in an annular matrix manner;

and one end of each exhaust branch pipe is connected with the connecting port.

Preferably, a cooling water pipe is arranged in the pipe separator, the cooling water pipe is spirally arranged in the pipe separator along the axial direction of the pipe separator, a water inlet and a water outlet are arranged on the pipe separator, one end of the cooling water pipe is connected with the water inlet, and the other end of the cooling water pipe is connected with the water outlet.

Preferably, the outer side surfaces of the two second filter screens on the filter device are respectively provided with a first magnet frame.

Preferably, the side that first filter screen and first mounting groove contacted is equipped with the second magnet frame.

Preferably, the end face of the second flange connecting seat and the end face of the third flange connecting seat are provided with sealing rings.

The utility model discloses a blast pipe for diesel engine compares with prior art and has following advantage:

(1) the corrugated pipe is arranged on the exhaust main pipe, so that on one hand, the installation tolerance can be compensated, the installation difficulty is reduced, on the other hand, the corrugated pipe has a damping effect, and the firmness and the tightness of pipeline connection can be improved;

(2) simple structure and convenient operation.

Drawings

FIG. 1 is a schematic view showing a structure of an exhaust pipe for a diesel engine not provided with a cooling water pipe;

FIG. 2 is a schematic view of the exhaust manifold configuration;

FIG. 3 is a schematic structural diagram of the tube separator;

FIG. 4 is a schematic structural view of a cooling water pipe;

FIG. 5 is a schematic diagram of a filter device;

FIG. 6 is a schematic structural diagram of a first filter screen;

fig. 7 is a schematic structural view of an exhaust pipe for a diesel engine provided with a cooling water pipe in the present embodiment.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-7, an exhaust pipe for a diesel engine comprises an exhaust main pipe 1, a pipe divider 2 and a plurality of exhaust branch pipes 3;

as shown in fig. 1, one end of the exhaust main pipe 1 is provided with a first flange connecting seat 4, the bottom of the first flange connecting seat 4 is recessed inwards to form a first mounting groove 5, and the first mounting groove 5 is provided with a first filter screen 17; the corrugated pipe 6 is arranged on the exhaust main pipe 1 through welding, the damping effect is achieved, and in addition, installation tolerance can be compensated when the exhaust main pipe and an external device are installed. A second flange connecting seat 7 is arranged at the other end of the exhaust main pipe 1, and a second mounting groove (not shown in the figure) is formed in the second flange connecting seat 7 in an inwards recessed mode;

as shown in fig. 3, one end of the pipe divider 2 is provided with a third flange connecting seat 9 matched with the second flange connecting seat 7, and the third flange connecting seat 9 is provided with a third mounting groove 11 matched with the second mounting groove in an inward recessed manner; the pipe divider 2 is connected to a second flange connecting seat 7 on the exhaust main pipe 1 through a third flange connecting seat 9; the second mounting groove and the third mounting groove 11 form a mounting space, a filter device is arranged in the mounting space, the filter device comprises two second filter screens 14, springs 15 are arranged on corners of the two second filter screens 14, and the two second filter screens 14 are connected through the springs 15 to further purify smoke in the exhaust pipe; the other end of the tube separator 2 is provided with a plurality of connecting ports (not shown in the figure) in an annular matrix manner;

and one ends of the plurality of exhaust branch pipes 3 are respectively connected with the connecting ports.

Preferably, as shown in fig. 3, 4 and 7, a cooling water pipe 13 is arranged in the tube divider 2, the cooling water pipe 13 is spirally arranged in the tube divider 2 along the axial direction of the tube divider 2, a water inlet 12 and a water outlet (not shown in the figures) are arranged on the tube divider 2, one end of the cooling water pipe 13 is connected with the water inlet 12, and the other end is connected with the water outlet; so set up, increased cooling area, improved the cooling effect to the flue gas.

Further, the outer side surfaces of the two second filter screens 14 on the filter device are respectively provided with a first magnet frame 16, so that the filter device can be further installed in the noise installation space. Similarly, the side surface of the first filter screen 17 contacting with the first mounting groove 5 is provided with a second magnet frame 18.

Further, in order to improve the sealing performance of the connection between the exhaust main pipe 1 and the pipe divider 2, the end surface of the second flange connecting seat 7 and the end surface of the third flange connecting seat 9 are provided with sealing rings (not shown in the figure).

The working principle is as follows: when the exhaust manifold is installed, the exhaust manifold 1 is fixed on a cylinder of the diesel engine through the first flange connecting seat 4; the corrugated pipe 6 on the exhaust main pipe 1 can make up for installation tolerance and reduce installation difficulty on one hand, and can play a role in damping when the exhaust pipe runs on the other hand, the cooling water pipe 13 in the pipe divider 2 increases the cooling area and improves the cooling effect of flue gas; when the diesel engine works, part of smoke and dust are filtered out through the first filter screen 17 by exhaust gas, then the exhaust gas enters the filter device again, the filtering effect is further reduced through double-layer filtering, then the exhaust gas is cooled by the cooling water pipe 13 in the pipe divider 2, and finally the exhaust gas is discharged through the exhaust branch pipe 3.

In the description of the present specification, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of describing the technical solutions of the present patent and for simplification of the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present patent application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this patent application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this specification, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present specification can be understood by those of ordinary skill in the art as appropriate.

In this specification, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. An exhaust pipe for a diesel engine is characterized by comprising an exhaust main pipe, a pipe divider and a plurality of exhaust branch pipes;

and one end of each exhaust branch pipe is connected with the connecting port.

2. The exhaust pipe for the diesel engine according to claim 1, wherein the pipe divider is provided with a cooling water pipe, the cooling water pipe is spirally arranged in the pipe divider along an axial direction of the pipe divider, the pipe divider is provided with a water inlet and a water outlet, and one end of the cooling water pipe is connected with the water inlet and the other end of the cooling water pipe is connected with the water outlet.

3. The exhaust pipe for the diesel engine as set forth in claim 1, wherein the first magnet frame is provided on the outer side surface of each of the two second filters of the filter device.

4. The exhaust pipe for the diesel engine as set forth in claim 3, wherein a second magnet frame is provided on a side surface of the first filter contacting the first mounting groove.

5. The exhaust pipe for the diesel engine according to any one of claims 1 to 4, wherein a seal ring is provided on an end surface of the second flange connecting seat and an end surface of the third flange connecting seat.