CN215292622U

CN215292622U - Anti-icing structure of crankcase ventilation pipe

Info

Publication number: CN215292622U
Application number: CN202120941112.2U
Authority: CN
Inventors: 王超; 张宇
Original assignee: Beijing Automobile Factory Qingdao Co ltd
Current assignee: Beijing Automobile Factory Qingdao Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-24
Anticipated expiration: 2031-04-30

Abstract

The application discloses crankcase ventilation pipe anti-icing structure is equipped with the breathing pipe in the ventilation pipe of crankcase, including air supply pipe, heating pipe and muffler. One end of the air supply pipe is connected with the exhaust end of the automobile exhaust gas, and the automobile exhaust gas can be guided. The heating pipe is arranged close to the breathing pipe, and one end of the heating pipe is connected with the other end of the air supply pipe and used for guiding automobile exhaust. One end of the air return pipe is connected with the other end of the heating pipe, and the other end of the air return pipe is connected with the exhaust end of the automobile exhaust gas and used for circulating the exhaust gas back to the exhaust end for emission. The setting through this application has played the heat retaining effect of heating to the respiratory tube that sets up in the return air duct to the freezing of crankcase return air duct has been avoided.

Description

Anti-icing structure of crankcase ventilation pipe

Technical Field

The application belongs to the technical field of automobiles, and in particular relates to an anti-icing structure for a crankcase ventilation pipe.

Background

With increasingly stringent engine emission regulations, closed crankshaft ventilation systems are mostly used in passenger car engines currently produced on the market. The closed crankshaft ventilation system is characterized in that blow-by gas in a crankshaft box is subjected to oil-gas separation treatment and then is introduced into an air inlet system through a pipeline to be combusted together with fresh air. Therefore, the gas in the crankcase is prevented from being discharged into the atmosphere to cause environmental pollution, the normal pressure in the crankcase can be maintained, and the normal work of the oil seal is facilitated.

However, in northern areas of China, the temperature is low in winter, hot oil vapor from the crankcase flows in the crankcase ventilation pipe and flows at the intersection of the air inlet pipe, so that cold air is accumulated, the position is easy to freeze to block the crankcase ventilation pipe, oil vapor in the engine crankcase cannot be discharged in time, the pressure of the crankcase in the engine is too high due to long-time operation, the oil seal leaks oil due to too large pressure difference, and even the oil seal falls off and damages the engine in severe cases. In the prior art, an electric heating method is usually adopted at a crankcase ventilation pipe to solve the problem that the crankcase is frozen in a low-temperature environment, but the electric heating is to convert electric energy into heat energy, so that the power consumption is high, and logic control needs to be added, so that the electric heating is complex.

It will thus be seen that the prior art is susceptible to further improvement and enhancement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a crankcase ventilation pipe anti-icing structure to at least one among the solution above-mentioned technical problem.

In order to achieve the above object, the utility model provides a crankcase ventilation pipe anti-icing structure is equipped with the breathing pipe in the ventilation pipe of crankcase, including blast pipe, heating pipe and muffler. One end of the air supply pipe is connected with the exhaust end of the automobile exhaust gas, and the automobile exhaust gas can be guided. The heating pipe is arranged close to the breathing pipe, and one end of the heating pipe is connected with the other end of the air supply pipe and used for guiding automobile exhaust. One end of the air return pipe is connected with the other end of the heating pipe, and the other end of the air return pipe is connected with the exhaust end of the automobile exhaust gas and used for circulating the exhaust gas back to the exhaust end for emission.

This application is through the setting of blast pipe, with automobile exhaust guide to heating pipe to through being close to the breathing pipe setting with the heating pipe, make waste gas heat the breathing pipe in the crankcase ventilation pipe through the heating pipe, avoid the crankcase ventilation pipe to freeze, also can ventilate smoothly under the low temperature environment with the assurance pipeline.

In a preferred implementation, the heating tube is coiled around the circumferential outside of the breathing tube. The heating pipe is coiled on the circumferential outer side of the breathing pipe, so that the contact area between the heating pipe and the breathing pipe is increased, and the heating efficiency of the heating pipe is improved.

In a preferred implementation, the supply pipe and the return pipe are each provided with a one-way valve, so that the exhaust gas flows only along the supply pipe to the return pipe. Through the setting of check valve, avoided waste gas to reduce by the muffler backward flow for the heating of heating pipe to the breathing tube is more effective.

In a preferred implementation, the outer wall of the heating tube is provided with a flame-retardant insulation layer. The flame-retardant heat-insulating layer is arranged on the outer side of the heating pipe, on one hand, the heat-insulating effect is achieved on the heating pipe through the flame-retardant heat-insulating layer, and the heating effect on the breathing pipe can be improved; on the other hand, the flame-retardant heat-insulating layer can also prevent the heat-insulating layer or the pipeline from burning due to overhigh temperature, and plays a certain role in protection.

In a preferred implementation, the outer walls of the air supply pipe and the air return pipe are provided with flame-retardant insulation layers. The outer walls of the air supply pipe and the air return pipe are provided with the flame-retardant heat-insulating layers, so that the loss of waste gas heat in the air supply pipe and the air return pipe can be reduced.

In a preferred implementation, the flame-retardant insulation layer is a rock wool flame-retardant insulation mat.

In a preferred implementation, a heat conducting layer is filled between the heating tube and the breathing tube. Through filling the heat-conducting layer between heating pipe and respiratory tube, can make the heat of heating pipe pass to respiratory tube very fast through the heat-conducting layer, and then improve heat transmission efficiency.

In a preferred implementation, the heat conducting layer is provided as a heat conducting silicone pad.

In a preferred implementation mode, the length of the heating pipe along the axial direction of the breathing pipe accounts for 1/8-1/3 of the total length of the breathing pipe. If the length of the heating tube along the circumferential direction of the breathing tube is less than 1/8 of the total length, the heating tube cannot effectively heat the breathing tube; if the length of the heating tube along the circumferential direction of the breathing tube is greater than 1/3 of the total length, the heating tube is wasted.

In a preferred implementation, the air feed pipe is provided with a control valve. Because the temperature is lower in most regions of China in winter, the freezing is easy, the temperature is more suitable in other seasons, and the freezing is generally less, the on-off setting of the air supply pipe can be realized by setting the control valve, the air supply pipe is opened for use in winter, and the air supply pipe is closed in other seasons.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the application and not to limit the invention. In the drawings:

fig. 1 is an overall schematic view of an anti-icing structure for a crankcase ventilation duct according to an embodiment of the present application.

Description of reference numerals:

1. an air supply pipe;

2. heating a tube;

3. an air return pipe;

4. a breathing tube.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it is to be understood that the terms "axial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members.

In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral part; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are not connected to each other by the intermediate structure but connected to each other by the connecting structure to form a whole. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1, the utility model provides a crankcase ventilation pipe anti-icing structure is equipped with respiratory tube 4 in the ventilation pipe of crankcase, including blast pipe 1, heating pipe 2 and muffler 3. One end of the air supply pipe 1 is connected to an exhaust end of the exhaust gas of the automobile, and the exhaust gas of the automobile can be guided. The heating pipe 2 is arranged close to the breathing pipe 4, and one end of the heating pipe 2 is connected with the other end of the air supply pipe 1 and used for guiding automobile exhaust gas. One end of the air return pipe 3 is connected with the other end of the heating pipe 2, and the other end of the air return pipe 3 is connected with the exhaust end of the automobile exhaust gas and used for circulating the exhaust gas back to the exhaust end for emission.

In the actual use process, when the exhaust end of the automobile exhaust gas begins to exhaust, the exhaust gas firstly enters from the air inlet end of the air supply pipe 1, then under the guidance of the air supply pipe 1, the automobile exhaust gas enters the heating pipe 2, then the breathing pipe 4 is heated, and finally the exhaust gas is recycled by the air return pipe 3 and exhausted to the exhaust end.

From the above description, it can be seen that the utility model discloses following technological effect is realized:

this application is through setting up of blast pipe 1, with automobile exhaust guide to heating pipe 2 to through being close to breathing pipe 4 setting with heating pipe 2, make waste gas heat the breathing pipe 4 in the crankcase ventilation pipe through heating pipe 2, avoid the crankcase ventilation pipe to freeze, also can ventilate smoothly under the low temperature environment with the assurance pipeline.

In one embodiment, the heating tube 2 is coiled around the circumference of the breathing tube 4. Coil heating pipe 2 in the circumference outside of breathing pipe 4, increased the area of contact between heating pipe 2 and the breathing pipe 4, improve the heating efficiency of heating pipe 2.

In one embodiment, check valves are provided in the supply pipe 1 and the return pipe 3, respectively, so that the exhaust gas flows only in the direction from the supply pipe 1 to the return pipe 3. Through the setting of check valve, avoided waste gas to reduce by muffler 3 backward flow for heating of heating pipe 2 to breathing tube 4 is more effective.

In one embodiment, the outer wall of the heating tube 2 is provided with a flame-retardant insulation layer. The flame-retardant heat-insulating layer is arranged on the outer side of the heating pipe 2, on one hand, the heat-insulating effect is achieved on the heating pipe 2 through the flame-retardant heat-insulating layer, and the heating effect on the breathing pipe 4 can be improved; on the other hand, the flame-retardant heat-insulating layer can also prevent the heat-insulating layer or the pipeline from burning due to overhigh temperature, and plays a certain role in protection.

In one embodiment, the outer walls of the supply pipe 1 and the return pipe 3 are provided with flame retardant insulation. The outer walls of the air supply pipe 1 and the air return pipe 3 are provided with the flame-retardant heat-insulating layers, so that the loss of waste gas heat in the air supply pipe 1 and the air return pipe 3 can be reduced.

In one embodiment, the fire-retardant insulation layer is a rock wool fire-retardant insulation mat. Of course, those skilled in the art will appreciate that other materials may be used for the flame-retardant layer, so long as they can provide the heat-insulating function and can retard flame.

In one embodiment, a heat conducting layer is filled between the heating tube 2 and the breathing tube 4. Through filling the heat-conducting layer between heating pipe 2 and breathing pipe 4, can make the heat of heating pipe 2 pass to breathing pipe 4 through what the heat-conducting layer was very fast, and then improve heat transmission efficiency.

In one embodiment, the heat conducting layer is provided as a heat conducting silicone pad. Of course, those skilled in the art will understand that other materials may be used for the heat conducting layer as long as the heat conducting function is achieved.

In one embodiment, the heating tube 2 has a length along the axial direction of the breathing tube 4 of 1/8 to 1/3 of the total length of the breathing tube 4. If the length of the heating tube 2 along the circumferential direction of the breathing tube 4 is less than 1/8 of the total length, the heating tube 2 does not have an effective heating effect on the breathing tube 4; if the length of the heating tube 2 along the circumferential direction of the breathing tube 4 is greater than 1/8, the heating tube 2 is wasted.

In one embodiment, the air feed pipe 1 is provided with a control valve. Because the temperature is lower in most regions of China in winter, the freezing is easy, the temperature is more suitable in other seasons, and the freezing is generally less, the on-off of the air supply pipe 1 can be set by controlling the valve, the air supply pipe 1 is opened for use in winter, and the air supply pipe 1 is closed in other seasons.

The utility model can be realized by adopting or using the prior art for reference in places which are not mentioned in the utility model.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a crankcase ventilation pipe anti-icing structure, be equipped with the breathing pipe in the ventilation pipe of crankcase, its characterized in that includes:

one end of the air supply pipe is connected with the exhaust end of the automobile exhaust gas, and the air supply pipe can guide the automobile exhaust gas;

the heating pipe is arranged close to the breathing pipe, and one end of the heating pipe is connected with the other end of the air supply pipe and used for guiding automobile exhaust gas;

and one end of the air return pipe is connected with the other end of the heating pipe, and the other end of the air return pipe is connected with the exhaust end of the automobile exhaust gas and used for circulating the exhaust gas back to the exhaust end for emission.

2. A crankcase ventilation tube ice protection structure according to claim 1, wherein the heating tube is coiled around the circumferential outside of the breathing tube.

3. The anti-icing structure for a crankcase ventilation tube according to claim 1, wherein a check valve is disposed in each of the air supply tube and the air return tube, so that the exhaust gas flows only along the direction from the air supply tube to the air return tube.

4. The anti-icing structure for the crankcase ventilation pipe according to claim 1, wherein the outer wall of the heating pipe is provided with a flame-retardant insulation layer.

5. The anti-icing structure for the crankcase ventilation pipe according to claim 1, wherein the outer walls of the air supply pipe and the air return pipe are provided with flame-retardant insulation layers.

6. A crankcase ventilation pipe anti-icing structure according to claim 4 or 5, wherein the fire-retardant insulation layer is a rock wool fire-retardant insulation pad.

7. A crankcase ventilation tube ice protection structure according to claim 1 or 2, wherein a heat conducting layer is filled between the heating tube and the breathing tube.

8. The anti-icing structure for the crankcase ventilation pipe according to claim 7, wherein the heat conducting layer is a heat conducting silicone pad.

9. The anti-icing structure for the crankcase ventilation tube according to claim 2, wherein the length of the heating tube along the axial direction of the breathing tube is 1/8-1/3 of the total length of the breathing tube.

10. A crankcase ventilation tube ice protection structure according to claim 1, wherein the air feed tube is provided with a control valve.