Vacuum layer of engine exhaust pipe heat preservation device

Abstract

The utility model discloses a vacuum layer of an engine exhaust pipe heat preservation device, belongs to the technical field of engines, and aims to solve the problems that the performance of an exhaust pipe heat insulation material is limited, heat conduction between a high-temperature exhaust pipe and the surrounding environment is difficult to effectively isolate, and energy waste and heat loss of the exhaust pipe are caused. An inner hard material layer is arranged in the outer hard material layer, a vacuum layer is formed between the outer hard material layer and the inner hard material layer, and a vacuum control assembly is arranged on one side of the outer side wall of the outer hard material layer; the vacuum control assembly in the heat preservation device can control the vacuum degree of the vacuum layer through the air exhauster in real time, so that heat conduction between the high-temperature engine exhaust pipe and the surrounding environment can be effectively isolated, and energy waste and heat loss of the engine exhaust pipe are avoided; therefore, the stability of the vacuum layer and the adaptability of the outer hard material layer can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of engine technology, specifically relating to a vacuum layer of an engine exhaust pipe insulation device. Background Art

[0002] Traditional exhaust pipe insulation materials have limited performance and are difficult to effectively isolate the high-temperature exhaust pipe from the surrounding environment, resulting in energy waste and heat loss from the exhaust pipe.

[0003] Therefore, a vacuum layer for engine exhaust pipe insulation is needed to solve the problem that the performance of existing exhaust pipe insulation materials is limited, making it difficult to effectively isolate the high-temperature exhaust pipe from the surrounding environment, resulting in energy waste and heat loss from the exhaust pipe. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum layer for an engine exhaust pipe insulation device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vacuum layer for an engine exhaust pipe insulation device, comprising an outer rigid material layer, an inner rigid material layer disposed within the outer rigid material layer, a vacuum layer formed between the outer rigid material layer and the inner rigid material layer, a vacuum control component disposed on one side of the outer wall of the outer rigid material layer, the vacuum control component comprising a vacuum pump, a vacuum control unit, a pressure sensor and a temperature sensor, the vacuum pump being fixed to one side of the outer wall of the outer rigid material layer, the input end of the vacuum pump penetrating the outer rigid material layer and communicating with the vacuum layer, the pressure sensor being fixed to one side of the inner wall of the outer rigid material layer, an engine exhaust pipe disposed inside the inner rigid material layer, and the temperature sensor being fixed to one side of the inner wall of the engine exhaust pipe.

[0006] It should be noted in the solution that the air extraction control unit is located inside the air extraction machine.

[0007] It is worth noting that a basalt pad is fixed to the inner wall of the inner hard material layer, and the inner wall of the basalt pad is fixed to the outer wall of the engine exhaust pipe.

[0008] Furthermore, it should be noted that a number of uniformly distributed vacuum layer support columns are fixed between the inner wall of the outer rigid material layer and the outer wall of the inner rigid material layer.

[0009] In a preferred embodiment, an external power source is fixed to one side of the outer wall of the outer rigid material layer, and a power cord is fixed to the terminal of the external power source. One end of the power cord is fixed to the terminal of the vacuum pump.

[0010] In a preferred embodiment, the pressure sensor and the temperature sensor are electrically connected to the air extraction control unit, respectively.

[0011] Compared with the prior art, the vacuum layer of the engine exhaust pipe insulation device provided by this utility model has at least the following beneficial effects:

[0012] (1) The vacuum control component in the heat preservation device can control the vacuum level of the vacuum layer in real time through the pump, thereby effectively isolating the heat conduction between the high-temperature engine exhaust pipe and the surrounding environment, avoiding energy waste and heat loss of the engine exhaust pipe, and thus improving the stability of the vacuum layer and the adaptability of the outer hard material layer.

[0013] (2) The vacuum layer of the insulation device has good heat insulation effect, which can effectively reduce heat loss and heat radiation and improve the heat insulation performance of the insulation device.

[0014] (3) The vacuum control component in the heat preservation device sets the temperature and pressure parameters according to the actual use, which improves the applicability of the device and reduces the actual use cost. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall side view structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the vacuum control component of this utility model.

[0017] In the picture:

[0018] 1. Outer rigid material layer; 2. Vacuum layer; 3. Vacuum layer support column; 4. Inner rigid material layer; 5. Basalt cushion layer; 6. Engine exhaust pipe; 71. Vacuum pump; 72. Vacuum pump control unit; 73. Pressure sensor; 74. Temperature sensor; 8. Power cord; 9. External power supply. Detailed Implementation

[0019] Please see Figure 1-2This utility model provides a vacuum layer for an engine exhaust pipe insulation device, including an outer rigid material layer 1 and an inner rigid material layer 4. A vacuum layer 2 is formed between the outer rigid material layer 1 and the inner rigid material layer 4. The vacuum layer 2 is the heat insulation part of the engine exhaust pipe 6, located between the outer rigid material layer 1 and the inner rigid material layer 4, and is used to block heat conduction and heat radiation. The vacuum layer 2 uses a vacuum pump 71 to extract the gas between the two rigid material layers, forming a low-pressure or pressureless state. The thickness of the vacuum layer 2 can be adjusted as needed, generally from a few millimeters to a few centimeters. A vacuum control component is provided on one side of the outer wall of the outer rigid material layer 1. The vacuum control component monitors the temperature inside the engine exhaust pipe 6 in real time through a temperature sensor 74 to control the vacuum pump 71. A pressure sensor 73 measures the pressure inside the vacuum layer 2 and feeds it back to the vacuum pump control unit 72. The vacuum pump control unit 72 controls the vacuum pump 71 to pump or fill the vacuum layer 2 to ensure that the pressure of the vacuum layer 2 fluctuates within a certain range. The insulation effect of the entire insulation device is adjusted by controlling the vacuum level of vacuum layer 2 to prevent overheating of engine exhaust pipe 6 under extreme conditions. The vacuum control component consists of a vacuum pump 71, a vacuum control unit 72, a pressure sensor 73, and a temperature sensor 74. The vacuum pump 71 is fixed to one side of the outer wall of the outer rigid material layer 1. The input end of the vacuum pump 71 passes through the outer rigid material layer 1 and communicates with the vacuum layer 2. The pressure sensor 73 is fixed to one side of the inner wall of the outer rigid material layer 1. The engine exhaust pipe 6 is provided inside the inner rigid material layer 4. The temperature sensor 74 is fixed to one side of the inner wall of the engine exhaust pipe 6.

[0020] Further as Figure 1 As shown, the air extraction control unit 72 is disposed inside the air extraction machine 71.

[0021] The air extraction control unit 72 enables the air extraction machine 71 to be started, thereby extracting the air from the vacuum layer 2.

[0022] Further as Figure 1 As shown, a basalt pad 5 is fixed to the inner wall of the inner hard material layer 4, and the inner wall of the basalt pad 5 is fixed to the outer wall of the engine exhaust pipe 6.

[0023] The basalt pad 5 is set up by using basalt textile material as a pad between the insulation device and the exhaust pipe. As the first insulation device, it maintains the temperature in the engine exhaust pipe 6, and at the same time, it acts as a buffer layer to reduce friction and collision between the insulation device and the exhaust pipe, thus extending the overall service life of the insulation device.

[0024] Further as Figure 1As shown, a number of uniformly distributed vacuum layer support columns 3 are fixed between the inner wall of the outer rigid material layer 1 and the outer wall of the inner rigid material layer 4.

[0025] The vacuum layer support column 3 can connect the inner rigid material layer 4 and the outer rigid material layer 1, and play a supporting and maintaining role in the vacuum layer 2. The thickness of the vacuum layer 2 can be adjusted during manufacturing by changing the length of the vacuum layer support column 3 to suit different application scenarios and insulation requirements.

[0026] Further as Figure 1 As shown, an external power supply 9 is fixed to one side of the outer wall of the outer rigid material layer 1, and a power cord 8 is fixed to the terminal of the external power supply 9. One end of the power cord 8 is fixed to the terminal of the vacuum pump 71.

[0027] The external power supply 9 provides power to the vacuum pump 71, and the power cord 8 connects the vacuum pump 71 to the external power supply 9.

[0028] Further as Figure 1 As shown, the pressure sensor 73 and the temperature sensor 74 are electrically connected to the air extraction control unit 72, respectively.

[0029] The pressure sensor 73 can be used to obtain the pressure in the vacuum layer 2, and the temperature sensor 74 can be used to obtain the temperature of the exhaust gas discharged from the engine exhaust pipe 6. The exhaust gas temperature discharged from the engine exhaust pipe 6 can then be controlled by the vacuum control component.

[0030] This solution includes the following work process: Figure 2 As shown, when the engine starts, the exhaust control unit 72 obtains the engine exhaust gas temperature Ti in real time through the temperature sensor 74 attached to the inside of the exhaust pipe. Before the exhaust gas temperature reaches the set value T0, the exhaust pump 71 continues to work. When the actual pressure Pi obtained by the pressure sensor 73 is lower than the set vacuum pressure value P0, the exhaust pump 71 stops working. The low thermal conductivity of the vacuum layer 2 maintains the gas temperature in the engine exhaust pipe 6 to ensure the actual effect of the aftertreatment device.

[0031] If the actual temperature Ti of the engine exhaust pipe 6 is lower than T0, and the actual pressure Pi of the vacuum layer 2 is greater than the set vacuum pressure value P0, the vacuum pump 71 will start working from the stopped state to maintain the vacuum state of the vacuum layer 2, ensuring the heat preservation effect of the heat preservation device and the stability of the vacuum layer 2.

[0032] If the actual temperature Ti of the engine exhaust pipe 6 is higher than the set maximum temperature T1, the engine exhaust pipe 6 needs to be cooled to avoid overheating affecting the normal operation of the aftertreatment device and exhaust system. At this time, the vacuum pump 71 should be turned off immediately so that the vacuum layer 2 can be naturally restored to the air-filled state, which will reduce the temperature rise caused by the heat preservation device to a certain extent.

[0033] In actual use, T0 is set according to the temperature required by the after-treatment device, T1 is taken as the minimum of the highest operating temperatures of the exhaust system, insulation device, and after-treatment device, and P0 is set comprehensively based on the actual usage environment, target insulation requirements, and usage costs. This broadens the application scenarios of the insulation device and reduces the cost of using the insulation device to a certain extent.

[0034] As can be seen from the above working process, the vacuum control component in the heat preservation device can control the vacuum level of the vacuum layer 2 in real time through the pump 71, thereby effectively isolating the heat conduction between the high-temperature engine exhaust pipe 6 and the surrounding environment, avoiding energy waste and heat loss of the engine exhaust pipe 6, and thus improving the stability of the vacuum layer 2 and the adaptability of the outer hard material layer.

[0035] The vacuum layer 2 of this insulation device has good heat insulation effect, which can effectively reduce heat loss and heat radiation, and improve the heat insulation performance of the insulation device.

[0036] The vacuum control component in this insulation device sets temperature and pressure parameters according to actual usage conditions, which improves the applicability of the device and reduces actual usage costs.

[0037] In summary: Figure 2 As shown, when the engine starts, the exhaust control unit 72 obtains the engine exhaust gas temperature Ti in real time through the temperature sensor 74 attached to the inside of the exhaust pipe. Before the exhaust gas temperature reaches the set value T0, the exhaust pump 71 continues to work. When the actual pressure Pi obtained by the pressure sensor 73 is lower than the set vacuum pressure value P0, the exhaust pump 71 stops working. The low thermal conductivity of the vacuum layer 2 maintains the gas temperature in the engine exhaust pipe 6 to ensure the actual effect of the aftertreatment device.

[0038] If the actual temperature Ti of the engine exhaust pipe 6 is lower than T0, and the actual pressure Pi of the vacuum layer 2 is greater than the set vacuum pressure value P0, the vacuum pump 71 will start working from the stopped state to maintain the vacuum state of the vacuum layer 2, ensuring the heat preservation effect of the heat preservation device and the stability of the vacuum layer 2.

[0039] If the actual temperature Ti of the engine exhaust pipe 6 is higher than the set maximum temperature T1, the engine exhaust pipe 6 needs to be cooled to avoid overheating affecting the normal operation of the aftertreatment device and exhaust system. At this time, the vacuum pump 71 should be turned off immediately so that the vacuum layer 2 can be naturally restored to the air-filled state, which will reduce the temperature rise caused by the heat preservation device to a certain extent.

[0040] In actual use, T0 is set according to the temperature required by the after-treatment device, T1 is taken as the minimum of the highest operating temperatures of the exhaust system, insulation device, and after-treatment device, and P0 is set comprehensively based on the actual usage environment, target insulation requirements, and usage costs. This broadens the application scenarios of the insulation device and reduces the cost of using the insulation device to a certain extent.

[0041] The vacuum pump 71, pressure sensor 73, temperature sensor 74 and external power supply 9 can all be purchased from the market. They are mature technologies in this field and have been fully disclosed, so they will not be described again in the specification.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum layer of an engine exhaust pipe insulation device, comprising an outer hard material layer (1), characterized in that: An inner hard material layer (4) is arranged inside the outer hard material layer (1), a vacuum layer (2) is formed between the outer hard material layer (1) and the inner hard material layer (4), a vacuum control component is arranged on one side of the outer wall of the outer hard material layer (1), the vacuum control component is composed of an air pump (71), an air pump control unit (72), a pressure sensor (73) and a temperature sensor (74), the air pump (71) is fixed to one side of the outer wall of the outer hard material layer (1), the input end of the air pump (71) passes through the outer hard material layer (1) and is connected to the vacuum layer (2), the pressure sensor (73) is fixed to one side of the inner wall of the outer hard material layer (1), an engine exhaust pipe (6) is arranged inside the inner hard material layer (4), and the temperature sensor (74) is fixed to one side of the inner wall of the engine exhaust pipe (6).

2. The vacuum layer of the engine exhaust pipe insulation device according to claim 1, characterized in that: The air extraction control unit (72) is arranged inside the air extractor (71).

3. The vacuum layer of the engine exhaust pipe insulation device according to claim 2, characterized in that: A basalt cushion layer (5) is fixed to the inner side wall of the inner hard material layer (4), and the inner side wall of the basalt cushion layer (5) is fixed to the outer side wall of the engine exhaust pipe (6).

4. The vacuum layer of the engine exhaust pipe insulation device according to claim 3, characterized in that: A plurality of evenly distributed vacuum layer support columns (3) are fixed between the inner side wall of the outer hard material layer (1) and the outer side wall of the inner hard material layer (4).

5. The vacuum layer of the engine exhaust pipe insulation device according to claim 4, characterized in that: An external power source (9) is fixed to one side of the outer wall of the outer hard material layer (1), a power cord (8) is fixed to the connection terminal of the external power source (9), and one end of the power cord (8) is fixed to the connection terminal of the vacuum pump (71).

6. The vacuum layer of the engine exhaust pipe insulation device according to claim 5, characterized in that: The pressure sensor (73) and the temperature sensor (74) are electrically connected to the air extraction control unit (72) respectively.

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