Respirator air outlet pipe heat preservation pipe for diesel engine

Abstract

The utility model relates to the technical field of diesel engines, in particular to a heat preservation pipe of a breather air outlet pipe for a diesel engine, which comprises a heat preservation pipe, one side of the top of the heat preservation pipe is open, a plurality of heating blocks are fixedly connected on the inner wall of the air outlet pipe, and a heating wire is fixedly connected between the heat preservation pipe and the air outlet pipe. And a plurality of heating rods are fixedly connected to the heating wire. Through a composite heating structure composed of the heat preservation pipe arranged on the outer side of the air outlet pipe in a sleeving mode, the heating wire and the heating rod, effective control over the external environment temperature of the air outlet pipe is achieved, and the problem that in the prior art, a cooling liquid circulation type heat preservation pipe cannot be heated in time in the cold start or low-temperature environment, and consequently freezing is caused is solved; the anti-freezing capability of the air outlet pipe under complex working conditions is obviously improved; and secondly, the heating block arranged on the inner wall of the gas outlet pipe can directly heat exhausted gas, and the water vapor condensation phenomenon caused by gas temperature reduction is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine technology, and in particular to a heat preservation pipe for the exhaust pipe of a breather for a diesel engine. Background Technology

[0002] The breather exhaust pipe of a diesel engine plays a crucial role in the engine's operating system. As a key component of the engine crankcase ventilation system, its main function is to expel exhaust gases or oil-gas mixtures generated by changes in engine operating pressure to the intake system for secondary combustion. This maintains internal engine pressure balance, reduces oil consumption, and improves emission performance. Especially in low-temperature or high-humidity conditions, the operational stability of this exhaust pipe has a decisive impact on the overall engine performance and safety.

[0003] Utility model patent CN206571549U discloses a heat-insulating pipe for the exhaust pipe of a diesel engine breather. The heat-insulating pipe includes a main body with an inner cavity and an outer cavity, the outer cavity surrounding the inner cavity. One end of the main body has an air inlet and a liquid inlet, and the other end has an air outlet and a liquid outlet. The air inlet and outlet are connected to the two ends of the inner cavity, while the liquid inlet and outlet are connected to the two ends of the outer cavity. In use, the inner cavity is used for the gas exhausted through the breather, while the outer cavity is used to circulate engine coolant, thus heating and insulating the gas inside the inner cavity. This structural design effectively solves the problem of ice formation and blockage of the breather exhaust pipe in low-temperature environments, improving the system's stability and applicability. Although this device improves the antifreeze capability of the exhaust pipe to some extent, it still has certain limitations in practical applications.

[0004] Specifically, the insulation performance of existing diesel engine breather exhaust pipes remains insufficient under extreme low temperatures or frequent start-stop conditions. Especially when the coolant temperature has not fully risen or the engine is in a cold start phase, moisture easily accumulates and condenses into ice inside the exhaust pipe, causing partial or even complete blockage. This leads to problems such as increased internal engine pressure, oil leakage, and reduced power. Furthermore, the existing structure has a relatively simple coolant flow path design, failing to fully consider maximizing heat exchange efficiency, thus limiting the insulation effect and making it difficult to meet the wide range of adaptability requirements for different engine models and complex environments. Therefore, to address the numerous shortcomings of existing technology, we urgently need an innovative insulation pipe for diesel engine breather exhaust pipes to solve the above problems. Summary of the Invention

[0005] The purpose of this utility model is to provide a heat-insulating pipe for the exhaust pipe of a breather for a diesel engine, which solves the problem that the heat insulation effect of the exhaust pipe of the breather for a diesel engine is still insufficient when dealing with extreme low temperatures or frequent start-stop conditions. In particular, when the coolant temperature has not fully risen or the engine is in the cold start stage, water vapor easily accumulates in the exhaust pipe and condenses into ice, causing partial or even complete blockage of the pipe, which in turn leads to increased internal pressure of the engine, oil leakage, and reduced power.

[0006] To achieve the above objectives, this utility model provides a heat-insulating pipe for the exhaust pipe of a breather for a diesel engine, including a frame, an exhaust pipe provided on the inner side of the frame, and a heat-insulating pipe sleeved on the outer side of the exhaust pipe.

[0007] The top of the insulation pipe is open on one side. Several heating blocks are fixedly connected to the inner wall of the vent pipe. A heating wire is fixedly connected between the insulation pipe and the vent pipe. Several heating rods are fixedly connected to the heating wire. Both ends of the heating wire are fixedly connected to the inner wall of the insulation pipe through connecting plates. A top frame is fixedly connected to the top of the frame. A double-ended screw is rotatably connected to the inner side of the top frame. Nut seats are threadedly connected to both ends of the double-ended screw. The bottom of the two nut seats is fixedly connected to the top of the insulation pipe.

[0008] The inner side of the insulation pipe has an inner groove, and an arc-shaped heating plate is fixedly connected to the inner side of the inner groove.

[0009] The frame has several base plates fixedly connected to the lower inner side, and all base plates have support plates fixedly connected to the top, and all support plates are located at the bottom of the insulation pipe.

[0010] Several telescopic plates are fixedly connected to both sides of the insulation pipe, and one end of each telescopic plate is fixedly connected to the inner wall of the frame.

[0011] One end of the bidirectional screw is rotatably connected to the inner wall of the top frame via a rotating shaft, and the other end of the bidirectional screw passes through the side wall of the top frame via a bearing sleeve. A limit plate is fixedly connected to the extended end of the bidirectional screw, and a limit rod is provided on one side of the limit plate. Limit grooves for use with the limit rod are provided on both the limit plate and one side of the top frame. Several limit grooves are provided on the limit plate.

[0012] Each of the two nut seats has a slider fixedly connected to its top, and both sliders are slidably connected to the top of the top frame via a groove.

[0013] This utility model discloses a heat-insulating pipe for the exhaust pipe of a diesel engine breather. Through a composite heating structure consisting of a heat-insulating pipe sleeved on the outside of the exhaust pipe, a heating wire, and a heating rod, it effectively controls the external ambient temperature of the exhaust pipe. This solves the problem of icing caused by the inability of existing coolant-circulating heat-insulating pipes to heat up in time during cold starts or in low-temperature environments, significantly improving the freeze resistance of the exhaust pipe under complex operating conditions. Secondly, the heating block installed on the inner wall of the exhaust pipe can directly heat the exhaust gas, effectively preventing water vapor condensation caused by a drop in gas temperature, further reducing the risk of exhaust pipe blockage and improving the reliability of the engine ventilation system. Secondly, the adjustment mechanism employing a bidirectional screw and two nut seats allows the insulation pipe to be compressed and fitted according to actual needs, enhancing the contact area and heat transfer efficiency between the insulation material and the outlet pipe. This structure is also simple to operate, responds quickly, and is suitable for installation with outlet pipes of different diameters, improving the device's versatility and adaptability. Furthermore, the top frame, as a supporting structure, not only provides a stable installation base for the bidirectional screw but also enhances the mechanical strength and durability of the entire adjustment assembly. Finally, the opening at the top of the insulation pipe ensures concentrated heat distribution to the outlet pipe while facilitating daily maintenance and repair, thus improving the overall practicality of the device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall main view structure of an embodiment of this utility model.

[0016] Figure 2 This is a side view structural diagram of an embodiment of the present utility model.

[0017] Figure 3 This is a top view of an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the inner structure of the frame in an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the air outlet pipe and the heat preservation pipe in an embodiment of this utility model.

[0020] 1. Frame; 2. Air outlet pipe; 3. Insulation pipe; 4. Heating block; 5. Heating wire; 6. Heating rod; 7. Inner groove; 8. Arc-shaped heating plate; 9. Connecting plate; 10. Base plate; 11. Support plate; 12. Top frame; 13. Bidirectional screw; 14. Slider; 15. Slide groove; 16. Telescopic plate; 17. Limiting plate; 18. Limiting rod; 19. Limiting groove; 20. Nut seat. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figure 1-5 A heat-insulating pipe for a breather pipe of a diesel engine includes a frame 1, an outlet pipe 2 disposed inside the frame 1, and an insulation pipe 3 sleeved outside the outlet pipe 2; the top of the insulation pipe 3 is open on one side, and several heating blocks 4 are fixedly connected to the inner wall of the outlet pipe 2, and a heating wire 5 is fixedly connected between the insulation pipe 3 and the outlet pipe 2, and several heating rods 6 are fixedly connected to the heating wire 5. Both ends of the heating wire 5 are fixedly connected to the inner wall of the insulation pipe 3 through connecting plates 9. A top frame 12 is fixedly connected to the top of the frame 1, and a double-ended screw 13 is rotatably connected to the inner side of the top frame 12. Both ends of the double-ended screw 13 are threadedly connected to nut seats 20, and the bottom of both nut seats 20 are fixedly connected to the top of the insulation pipe 3.

[0023] During diesel engine operation, when exhaust gas from the breather is discharged through the outlet pipe 2, the heating wire 5 is activated first. This heating wire 5 is fixedly positioned between the insulation pipe 3 and the outlet pipe 2, and several heating rods 6 are fixedly connected to it to evenly conduct heat to the outer wall of the outlet pipe 2, thus achieving initial heating and insulation of the outlet pipe 2. Simultaneously, multiple heating blocks 4 are also installed on the inner wall of the outlet pipe 2. These heating blocks 4 can directly heat the gas flowing through the outlet pipe 2, preventing water vapor from condensing into ice and blocking the pipe. To further improve the insulation effect, the operator can manually rotate the bidirectional screw connected to the inner side of the top frame 12. The rod 13 has two nut seats 20 connected to both ends of the bidirectional screw 13 by threaded engagement, and their bottoms are fixedly connected to the top of the insulation pipe 3. Therefore, when the bidirectional screw 13 rotates, the two nut seats 20 will move in opposite directions and move closer to each other, causing the insulation pipe 3 to elastically contract, making the insulation pipe 3 fit more tightly against the outer surface of the air outlet pipe 2, enhancing heat conduction efficiency and insulation performance. After adjustment, the bidirectional screw 13 is then limited and fixed to maintain the stability of the insulation structure. Throughout the process, the top side of the insulation pipe 3 is designed to be open, which facilitates installation and adjustment, and also helps to concentrate and distribute heat, improving heating efficiency.

[0024] Furthermore, an inner groove 7 is provided on the inner side of the insulation pipe 3, and an arc-shaped heating plate 8 is fixedly connected to the inner side of the inner groove 7. Based on the heating wire 5 and the heating rod 6 heating the outside of the air outlet pipe 2, the arc-shaped heating plate 8 further conforms to the outer wall contour of the air outlet pipe 2, expands the heating contact area, improves the heat conduction efficiency, and makes the heat distribution more uniform, thereby enhancing the overall insulation effect and effectively preventing water vapor from condensing into ice in low-temperature environments.

[0025] Furthermore, several base plates 10 are fixedly connected to the lower inner side of the frame 1, and a support plate 11 is fixedly connected to the top of all the base plates 10. All the support plates 11 are located at the bottom of the insulation pipe 3. The support plates 11 provide a stable bottom support structure for the insulation pipe 3 and the air outlet pipe 2, preventing deformation or displacement caused by gravity or vibration, improving the structural stability and load-bearing capacity of the entire device during operation, and extending its service life.

[0026] Furthermore, several telescopic plates 16 are fixedly connected to both sides of the insulation pipe 3, and one end of all the telescopic plates 16 is fixedly connected to the inner wall of the frame 1. The telescopic plates 16 can elastically expand and contract when the insulation pipe 3 contracts or expands due to adjustment, playing a guiding and buffering role, avoiding displacement deviation or jamming of the insulation pipe 3 during adjustment, while enhancing the sealing and stability of the overall structure and ensuring the continuous operation of the heating system.

[0027] Furthermore, one end of the bidirectional screw 13 is rotatably connected to the inner wall of the top frame 12 via a rotating shaft, and the other end of the bidirectional screw 13 passes through the side wall of the top frame 12 via a bearing sleeve. A limiting plate 17 is fixedly connected to the extended end of the bidirectional screw 13, and a limiting rod 18 is provided on one side of the limiting plate 17. A limiting groove 19 for use with the limiting rod 18 is provided on both the limiting plate 17 and one side of the top frame 12. Several limiting grooves 19 are provided on the limiting plate 17. After the insulation tube 3 is adjusted, the bidirectional screw 13 can be locked by inserting the limiting rod 18 into the corresponding limiting groove 19 to prevent it from loosening or shifting during use, thus ensuring the stability of the adjustment state and the safety of operation.

[0028] Furthermore, each of the two nut seats 20 is fixedly connected to a slider 14 at its top, and both sliders 14 are slidably connected to the top of the top frame 12 through a groove 15. During the rotation of the bidirectional screw 13, which drives the nut seat 20 to move, the slider 14 slides along the groove 15 to provide guiding support, ensuring that the movement path of the nut seat 20 is accurate and stable, preventing deviation or shaking, improving the action accuracy and operational reliability of the adjustment mechanism, thereby enhancing the adjustment effect of the insulation pipe 3 fitting the air outlet pipe 2.

[0029] In summary:

[0030] During diesel engine operation, when exhaust gas from the breather is discharged through the outlet pipe 2, the heating wire 5 is activated first. This heating wire 5 is fixedly installed between the insulation pipe 3 and the outlet pipe 2, and several heating rods 6 are fixedly connected to it. These rods are used to evenly conduct heat to the outer wall of the outlet pipe 2, thus achieving initial heating and insulation of the outlet pipe 2. Simultaneously, multiple heating blocks 4 are installed on the inner wall of the outlet pipe 2. These heating blocks 4 can directly heat the gas flowing through the outlet pipe 2, preventing water vapor from condensing into ice and blocking the pipe due to temperature drop. To further improve the insulation effect, the operator can manually rotate the top... The bidirectional screw 13, rotatably connected inside the frame 12, has two nut seats 20 threadedly connected to both ends of the screw 13, with their bottoms fixedly connected to the top of the insulation pipe 3. Therefore, when the bidirectional screw 13 rotates, the two nut seats 20 move in opposite directions and approach each other, causing the insulation pipe 3 to elastically contract. This makes the insulation pipe 3 fit more tightly against the outer surface of the air outlet pipe 2, enhancing heat transfer efficiency and insulation performance. During the rotation of the bidirectional screw 13, the sliders 14 fixedly connected to the tops of the two nut seats 20 slide along the grooves 15 on the top of the top frame 12, providing guiding support and ensuring the precise movement path of the nut seats 20. The adjustment is precise and stable to prevent deviation or shaking. After adjustment, the limiting rod 18 is inserted into the limiting plate 17 and the limiting groove 19 on the top frame 12 to lock the bidirectional screw 13, preventing it from loosening or shifting during use. Throughout the process, the top side of the insulation pipe 3 is designed to be open for easy installation and adjustment, and also to facilitate heat concentration and distribution, improving heating efficiency. In addition, an arc-shaped heating plate 8 is fixedly connected in the inner groove 7 on the inner side of the insulation pipe 3, further conforming to the outer wall contour of the air outlet pipe 2, expanding the heating contact area, making the heat distribution more uniform, and enhancing the overall insulation effect. The sides of the insulation pipe 3 are also fixed. Several telescopic plates 16 are fixedly connected, one end of which is fixedly connected to the inner wall of the frame 1. When the insulation pipe 3 contracts or expands due to adjustment, it can elastically expand and contract, playing a guiding and buffering role, avoiding displacement deviation or jamming of the insulation pipe 3 during adjustment, and enhancing the sealing and stability of the overall structure. In addition, several base plates 10 are fixedly connected to the lower inner side of the frame 1. All base plates 10 are fixedly connected to the top of a support plate 11, located at the bottom of the insulation pipe 3, providing a stable bottom support structure to prevent deformation or displacement due to gravity or vibration, and improving the structural stability and load-bearing capacity of the entire device during operation.The composite heating structure, consisting of an insulation pipe 3 sleeved on the outside of the exhaust pipe 2, a heating wire 5, and a heating rod 6, effectively controls the external ambient temperature of the exhaust pipe 2. This solves the problem of icing caused by the inability of the coolant circulating insulation pipe to heat up in time during cold starts or in low-temperature environments, significantly improving the antifreeze capability of the exhaust pipe 2 under complex operating conditions. Secondly, the heating block 4 installed on the inner wall of the exhaust pipe 2 can directly heat the exhaust gas, effectively preventing water vapor condensation caused by the drop in gas temperature, further reducing the risk of blockage in the exhaust pipe 2 and improving the reliability of the engine ventilation system. Thirdly, the adjustment mechanism using a bidirectional screw 13 and two nut seats 20 allows the insulation pipe 3 to be compressed and fitted according to actual needs, enhancing the contact area and heat transfer efficiency between the insulation material and the exhaust pipe 2. This structure is also easy to operate, responds quickly, and is suitable for installation with exhaust pipes of different diameters, improving the versatility and adaptability of the device. Furthermore, the top... The frame 12, as a supporting structure, not only provides a stable installation base for the bidirectional screw 13, but also enhances the mechanical strength and durability of the entire adjustment assembly. The limiting and locking structure composed of the limiting plate 17, the limiting rod 18, and the limiting groove 19 ensures the long-term stability of the adjustment state, prevents loosening caused by vibration or accidental contact, and improves operational safety. The guide structure composed of the slider 14 and the slide groove 15 ensures that the nut seat 20 moves accurately, improving adjustment precision and operational reliability. The arc-shaped heating plate 8 set inside the insulation pipe 3, combined with the inner groove 7, expands the heating area, making heat transfer more efficient and uniform, and improving the overall insulation performance. The design of the telescopic plate 16 enhances the guiding and buffering capacity of the insulation pipe 3 during the adjustment process, avoiding the impact of structural deformation on sealing and heating effect. The support plate 11 and the base plate 10 together form a stable basic support system, ensuring the structural integrity and operational stability of the entire device during long-term operation. In summary, this utility model not only effectively overcomes the technical defect of the exhaust pipe of the breather for diesel engines being prone to freezing and blockage in low-temperature environments, but also comprehensively improves the heat preservation performance, applicability and operational safety of the exhaust pipe 2 through innovative designs such as multi-point heating, dynamic fit adjustment, and multiple limits and guides, providing a solid technical guarantee for the efficient and stable operation of the crankcase ventilation system of diesel engines.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A heat-insulating pipe for the exhaust pipe of a breather for a diesel engine, comprising a frame, characterized in that, It also includes an air outlet pipe on the inner side of the frame, and an insulation pipe sleeved on the outer side of the air outlet pipe; The top of the insulation pipe is open on one side. Several heating blocks are fixedly connected to the inner wall of the vent pipe. A heating wire is fixedly connected between the insulation pipe and the vent pipe. Several heating rods are fixedly connected to the heating wire. Both ends of the heating wire are fixedly connected to the inner wall of the insulation pipe through connecting plates. A top frame is fixedly connected to the top of the frame. A double-ended screw is rotatably connected to the inner side of the top frame. Nut seats are threadedly connected to both ends of the double-ended screw. The bottom of the two nut seats is fixedly connected to the top of the insulation pipe.

2. The insulated pipe for the exhaust pipe of a breather for a diesel engine as described in claim 1, characterized in that, The inner side of the insulation pipe is provided with an inner groove, and an arc-shaped heating plate is fixedly connected to the inner side of the inner groove.

3. The insulated pipe for the exhaust pipe of a breather for a diesel engine as described in claim 1, characterized in that, Several base plates are fixedly connected to the lower inner side of the frame, and a support plate is fixedly connected to the top of each base plate, and all the support plates are located at the bottom of the insulation pipe.

4. The insulated pipe for the exhaust pipe of a breather for a diesel engine as described in claim 1, characterized in that, Several telescopic plates are fixedly connected to both sides of the insulation pipe, and one end of each telescopic plate is fixedly connected to the inner wall of the frame.

5. The insulated pipe for the exhaust pipe of a breather for a diesel engine as described in claim 1, characterized in that, One end of the bidirectional screw is rotatably connected to the inner wall of the top frame via a rotating shaft, and the other end of the bidirectional screw passes through the side wall of the top frame via a bearing sleeve. A limiting plate is fixedly connected to the extended end of the bidirectional screw, and a limiting rod is provided on one side of the limiting plate. Limiting grooves for use with the limiting rod are provided on both the limiting plate and one side of the top frame. Several limiting grooves are provided on the limiting plate.

6. The insulated pipe for the exhaust pipe of a breather for a diesel engine as described in claim 1, characterized in that, Both of the nut seats have sliders fixedly connected to their tops, and both sliders are slidably connected to the top of the top frame via grooves.

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