Anti-icing device suitable for crankcase ventilation system
By installing insulation sleeves and heaters on the respirator and outlet pipes, the problem of ice in the diesel engine outlet pipes is solved, and the effect of preventing blockage and increasing pressure is achieved.
Patent Information
- Application Number
- CN202422112826.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-08-29
AI Technical Summary
The air outlet pipe of a diesel engine is prone to freezing in low temperature environments, resulting in blockage and affecting the normal operation of the engine.
An anti-icing device including an insulation sleeve and a heater is designed. The insulation sleeve wraps the respirator and the air outlet pipe. The heater is integrated at the connection between the two ends of the air outlet pipe to remove the ice through the heating pipe.
It effectively avoids icing inside the ventilator outlet pipe, prevents blockage and increase pressure, ensures the normal operation of the crankcase, and has a simple overall structure, low cost and small space.
Smart Images
Figure CN222686759U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, in particular to an anti-icing device suitable for a crankcase ventilation system. Background Art
[0002] The crankcase ventilation device is also called a breather, which is mainly used to separate the oil and gas in the crankcase. The oil and gas separated by the breather enter the intake system, that is, the end of the breather air pipe is connected to the intake pipe of the whole vehicle. The diesel engine's breather outlet pipe is long, and the end of the breather outlet pipe is far away from the engine. The gas discharged by the breather contains a lot of water vapor. The water vapor in the breather exhaust gas condenses into ice at the position where it enters the intake pipe. Because it has been in a low temperature environment, the ice will gradually accumulate more and more, and the breather outlet pipe will be blocked by ice, resulting in excessive internal pressure in the diesel engine. In actual use, especially in winter or high-cold areas, the breather outlet pipe often freezes, causing various engine failures, such as supercharger oil leakage and other failures, affecting the normal operation of the engine. Therefore, how to overcome the shortcomings of the existing technology is a problem that needs to be solved urgently in the field of engine technology.
[0003] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content
[0004] The utility model aims to provide an anti-icing device suitable for a crankcase ventilation system to solve the technical problem of ice forming at the intersection of a respirator outlet pipe and an air inlet pipe in the above-mentioned prior art.
[0005] To this end, the utility model proposes an anti-icing device suitable for a crankcase ventilation system.
[0006] Preferably, the utility model may also have the following technical features:
[0007] 14. The ventilator as claimed in claim 13, wherein the air inlet pipe of the engine is connected to the air outlet of the engine and the air inlet of the engine is connected to the air outlet of the engine ...
[0008] Preferably, it also includes a third insulation cover arranged around the outer periphery of the oil return pipe at the bottom of the respirator.
[0009] Preferably, the second thermal insulation cover comprises a plurality of thermal insulation sheets divided transversely or longitudinally along the respirator, and the plurality of thermal insulation sheets are combined to wrap the respirator.
[0010] Preferably, the thermal insulation sheet comprises an upper sheet, a middle sheet and a lower sheet arranged along the height direction of the respirator.
[0011] Preferably, the thermal insulation sheet is divided into a plurality of thermal insulation sheets longitudinally along any one of the oil return port, the air outlet and the air inlet of the respirator.
[0012] Preferably, the heat-insulating sleeve comprises a heat-shrinkable tube and a rubber-plastic sponge, wherein the rubber-plastic sponge is arranged close to the respirator or the exhaust pipe, and the heat-shrinkable tube is arranged around the rubber-plastic sponge.
[0013] Preferably, the main raw materials of the rubber-plastic sponge are nitrile rubber and polyvinyl chloride, and the wall thickness is 8 mm.
[0014] Preferably, it also includes an anti-wear sleeve wrapped around the thermal insulation sleeve.
[0015] Compared with the prior art, the beneficial effects of the utility model include: a heat preservation sleeve is arranged outside the respirator and its air outlet pipe to keep the respirator and the air outlet pipe warm; heaters are arranged at both ends of the respirator air outlet pipe, namely at the connection between the air outlet pipe and the respirator air outlet and the supercharger air inlet pipe; during specific operation, the connector is heated, the connector heats the heating pipe, and the heating pipe transfers heat to the air outlet and the air inlet pipe, which can dissolve ice cubes and effectively avoid ice formation inside the respirator, namely the air outlet pipe, which leads to blockage and increased pressure, causing the crankcase oil pan or cylinder head to burst due to excessive pressure; the overall structure of the device is simple, the effect is good, the cost is low, and the space occupied is small. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a first structural schematic diagram of a specific implementation mode of the utility model.
[0017] Figure 2 It is a second structural schematic diagram of a specific implementation mode of the utility model.
[0018] Figure 3 It is a third structural schematic diagram of a specific implementation method of the utility model.
[0019] Figure 4 It is a structural schematic diagram of a respirator according to a specific implementation method of the utility model.
[0020] Figure 5 It is a structural schematic diagram of a heater according to a specific implementation method of the utility model.
[0021] Description of reference numerals:
[0022] 1-insulation sleeve; 11-first insulation sleeve; 111-fixing ring; 12-second insulation sleeve; 121-upper piece; 122-middle piece; 123-lower piece; 13-third insulation sleeve; 2-heater; 21-heating tube; 22-protrusion; 23-connector; 3-respirator; 31-exhaust pipe; 32-exhaust port; 33-oil return port; 34-oil return pipe; 35-intake port; 36-air intake port; 4-rocker cover; 41-exhaust port; 51-intake pipe. DETAILED DESCRIPTION
[0023] The present invention is further described in detail below in conjunction with specific implementations and in conjunction with the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.
[0024] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts unless otherwise specifically stated.
[0025] An anti-icing device suitable for a crankcase ventilation system, such as Figures 1 to 5As shown, it includes a heat preservation cover 1 and a heater 3; the heat preservation cover 1 includes a first heat preservation cover 11 and a second heat preservation cover 12, the first heat preservation cover 11 is arranged around the outer periphery of the air outlet pipe 31 of the respirator 3, the respirator 3 is arranged on the rocker cover 4 of the engine, and its air inlet 35 is connected to the crankcase exhaust port 41, and the exhaust gas in the crankcase is introduced into the respirator 3 for oil-gas separation. Specifically, the respirator 3 is at a certain distance from the air inlet pipe 51 of the engine supercharger. In a cold environment, the air inlet 35 of the respirator 3 is connected to the crankcase exhaust port 41, and the exhaust gas in the crankcase is introduced into the respirator 3 for oil-gas separation. The gas in the air pipe 51 is easy to freeze. A fixing ring 111 connected to the rocker chamber cover 4 can be provided in the middle of the first insulation cover 11 to prevent the air outlet pipe 31 and the first insulation cover 11 from shaking or even falling off. The two ends of the air outlet pipe 31 are respectively connected to the air outlet 32 of the respirator 3 and the air inlet pipe 51 of the supercharger. In an external low temperature environment, the connection between the two ends of the air outlet pipe 31 is very easy to freeze. Specifically, the heater 2 can be integrated at the connection between the two ends, such as Figure 5 As shown, a heating tube 21 is horizontally arranged inside the heater 2, and a protrusion 22 is arranged on the outside. A connector 23 is arranged at the protrusion 22. The connector 23 can provide heat to the heating tube 21, so that the heating tube 21 transfers heat to the air outlet 32 and the air inlet pipe 51. The heating tube 21 is horizontally arranged through the heater 2. During installation, the heating tube 21 is coaxial with the connection of the air outlet pipe 31, that is, the heating tube is arranged in the extension direction of the connection of the air outlet pipe 31, which is convenient for integrating the heater 2 into the air outlet pipe 31 and can effectively avoid leakage caused by bending; the second insulation cover 12 is arranged around the outer periphery of the respirator 3. The first insulation cover 11 and the second insulation cover 12 can prevent the internal gas temperature of the corresponding components from being too low, and play a role in heat preservation. With the support of the heaters 2 at both ends of the air outlet pipe 31, the connection is heated to prevent ice from forming at the connection, so that the gas in the respirator 3 and the air outlet pipe 31 can flow smoothly.
[0026] Specifically, Figure 1 and 4 As shown, a third insulation cover 13 may also be provided around the oil return pipe 34 at the bottom of the respirator 3. The oil return pipe 34 is connected to the oil return port 33 of the respirator 3, so that the oil separated by the respirator 3 returns to the gear chamber and finally enters the oil pan. The addition of the third insulation cover 13 can effectively prevent the oil return pipe 34 from freezing and prevent poor oil return.
[0027] Specifically, the second thermal insulation cover 12 includes a plurality of thermal insulation sheets divided horizontally or vertically along the respirator 3, and the plurality of thermal insulation sheets are combined to wrap the respirator 3. The second thermal insulation cover 12 can be divided according to the shape characteristics of the respirator 3 to facilitate the molding of the second thermal insulation cover 12. Figure 4As shown, the second insulation cover 12 can be specifically divided into an upper piece 121, a middle piece 122 and a lower piece 123 transversely, and then it can be arranged along the height direction of the respirator 3. In some other examples, it can also be divided longitudinally along the center line of the respirator to form left and right insulation sheets. Specifically, it can be divided longitudinally in half along the axis of the oil return port, or it can be divided longitudinally in half along the axis of the air inlet and outlet of the respirator, or it can be divided at other positions, or even longitudinally divided into several insulation sheets, and divided axially where there is an axis, so that the mold structure of the molded insulation sheet is simple, which can save mold costs and simplify production. The specific division method is determined according to the appearance characteristics of the respirator 3 to facilitate the molding of the second insulation cover.
[0028] Specifically, the insulation sleeve 1 includes a heat shrink tube and a rubber sponge, which can work for a long time in an environment of -40 to 105°C. The rubber sponge is set close to the respirator or the exhaust pipe. The main raw materials are nitrile rubber and polyvinyl chloride, which are foamed by a special process. The wall thickness is 8mm, and an error of ±1mm is usually allowed. The heat shrink tube is set around the rubber sponge, and its wall thickness is 0.5 to 1mm. In specific use, the heat shrink tube is allowed to have slight wrinkles or slight deformation at the bend, which does not affect the use. Usually, an anti-wear sleeve is set on the outside of the insulation sleeve, which is usually made of nylon or polyester resin and has a thickness of about 1mm. This can effectively extend the service life of the insulation sleeve and save costs.
[0029] In specific operation, a respirator 3 is arranged near the crankcase exhaust port 41, exhaust gas enters the respirator 3 from the crankcase exhaust port 41, and pressurized gas is introduced into the respirator 3 from the air inlet 36 of the respirator 3. After the oil and gas are separated in the respirator 3, the liquid oil enters the gear chamber from the oil return port 33 at the bottom of the respirator 3, and finally enters the oil pan. The separated water vapor enters the combustion chamber of the engine body after passing through the supercharger intake pipe 51. The respirator outlet pipe has a long path. In a low temperature environment, water vapor will be frozen and blocked when it is cooled. The utility model adds a thermal insulation cover 1 to the respirator 3, the outlet pipe 31 and the oil return pipe 34, and adds a heater 2 at the connection points at both ends of the outlet pipe 31, which can effectively avoid the occurrence of this phenomenon.
[0030] Those skilled in the art will appreciate that numerous variations to the above description are possible, and that the examples and figures are intended only to describe one or more specific implementations.
[0031] Although exemplary embodiments of the present invention have been described and described, it will be understood by those skilled in the art that various changes and substitutions may be made thereto without departing from the spirit of the present invention. In addition, many modifications may be made to adapt specific situations to the teachings of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but the present invention may also include all embodiments and their equivalents that fall within the scope of the present invention.
Claims
1. An anti-icing device suitable for a crankcase ventilation system, characterized in that: It includes a thermal insulation sleeve and a heater; the thermal insulation sleeve includes a first thermal insulation sleeve and a second thermal insulation sleeve, the first thermal insulation sleeve is arranged around the outer periphery of the air outlet pipe of the respirator, the respirator is arranged on the rocker arm chamber cover of the engine, and is at a certain distance from the air intake pipe of the engine supercharger, a fixing ring connected to the rocker arm chamber cover is arranged in the middle of the first thermal insulation sleeve, the two ends of the air outlet pipe are respectively connected to the air outlet of the respirator and the air intake pipe of the supercharger, and the connection between the two ends is integrated with the heater, a heating pipe is transversely arranged inside the heater, a protrusion is arranged on the outside, a connector is arranged at the protrusion, the connector can supply heat to the heating pipe, so that the heating pipe transfers heat to the air outlet and the air intake pipe, the heating pipe passes through the heater, and is coaxial with the connection of the air outlet pipe; the second thermal insulation sleeve is arranged around the outer periphery of the respirator.
2. The anti-icing device for crankcase ventilation system according to claim 1, characterized in that: It also includes a third insulation cover arranged around the outer periphery of the oil return pipe at the bottom of the respirator.
3. The anti-icing device for crankcase ventilation system according to claim 1, characterized in that: The second thermal insulation cover comprises a plurality of thermal insulation sheets which are divided transversely or longitudinally along the respirator, and the plurality of thermal insulation sheets are combined to wrap the respirator.
4. The anti-icing device for crankcase ventilation system according to claim 3, characterized in that: The heat preservation sheet comprises an upper sheet, a middle sheet and a lower sheet arranged along the height direction of the respirator.
5. The anti-icing device for crankcase ventilation system according to claim 3, characterized in that: The heat-insulating sheet is divided into a plurality of heat-insulating sheets longitudinally along any one of the oil return port, the air outlet and the air inlet of the respirator.
6. The anti-icing device for crankcase ventilation system according to claim 1, characterized in that: The heat-insulating sleeve comprises a heat-shrinkable tube and a rubber-plastic sponge. The rubber-plastic sponge is arranged close to the respirator or the air outlet pipe, and the heat-shrinkable tube is arranged around the rubber-plastic sponge.
7. The anti-icing device for crankcase ventilation system according to claim 6, characterized in that: The main raw materials of the rubber-plastic sponge are nitrile rubber and polyvinyl chloride, and the wall thickness is 8mm.
8. The anti-icing device for crankcase ventilation system according to claim 1, characterized in that: It also includes an anti-wear sleeve that wraps the thermal insulation sleeve.