High-temperature fireproof system for engine compartment of loading machine

Abstract

The utility model discloses a loader engine compartment high-temperature fire prevention system, which comprises a heat insulation plate, a protection plate, an engine cover, an auxiliary heat dissipation device and an ash removal device, the heat insulation plate is arranged on the inner side of the engine cover, the protection plate is arranged on the upper periphery of a post-treatment tank, the heat insulation plate separates a high-temperature area in the engine cover, and the protection plate can block the high temperature of the post-treatment tank. Inflammable impurities are prevented from entering a high-temperature area in the working process of the whole machine, the hidden danger of fire disasters is reduced, meanwhile, an auxiliary heat dissipation device and an ash removal device are additionally arranged in the high-temperature area, the auxiliary heat dissipation device can assist in heat dissipation to prevent the temperature of the post-treatment tank body from being too high, and the ash removal device can regularly clean impurities accumulated around the post-treatment tank body. The engine hood is installed and arranged in the original space in the engine hood, the structure and the position of an original system are not affected, the space in the engine hood is reasonably utilized, and the hidden danger that under the specific working condition, due to the fact that combustible materials are accumulated, the temperature of parts in the engine hood is too high, and fire hazards are caused is avoided.

Description

Technical Field

[0001] The utility model relates to the field of heat insulation of loaders, in particular to a high-temperature fire protection system for a loader engine compartment. Background Art

[0002] Loaders are a traditional and widely used earth-moving and transporting machinery, which are widely used in earthwork construction and other engineering construction. Traditional loaders are mostly powered by turbocharged diesel engines. The diesel engines used in loaders are often higher in power, generate more heat, have poor working environment and low oil quality. At the same time, due to their special working mode, most loaders work with high throttle, short distance or on-the-spot operation. Most of them operate in factories, construction sites, workshops and other environments with poor ventilation and high dust and debris. It is easy for combustibles and flammables to accumulate in the engine compartment. Under the conditions of poor heat dissipation or untimely cleaning, it is easy to cause high engine temperature. If the whole machine continues to operate under high temperature conditions, it will not only affect the life of components, but also pose a risk of fire.

[0003] In addition, in recent years, with the continuous increase in the number and use of non-road mobile machinery, the environmental problems caused by its emissions have become increasingly serious. Various countries have also successively raised the relevant emission standards for non-road mobile machinery to constrain it. In addition, with the technical upgrade of the engine, engine manufacturers often configure post-processing systems to treat exhaust gas to meet relevant emission standards. Because the temperature of the post-processing system can reach 400 degrees or above when working or regenerating, the temperature of the engine exhaust gas can reach more than 800 degrees when it flows through the exhaust manifold. However, due to its structure and working conditions, the cooling method of loader engines is mostly air-cooled and water-cooled, and the engine compartment fan drives the air to form convection to take away heat. If it operates under the working conditions where the medium is combustible and flammable, such as straw, bio-power station, animal husbandry, agriculture, etc., and the engine hood is not well sealed, it is easy to blow the combustibles into the engine compartment, causing the combustibles to accumulate near high-temperature components such as the post-processing tank, supercharger housing, and exhaust manifold, which will cause fire hazards. Utility Model Content

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a high-temperature fire protection system for the engine compartment of a loader, which is composed of an engine hood, a heat insulation plate, a protective plate, an auxiliary heat dissipation device, and a dust cleaning device; the heat insulation plate, the protective plate, the auxiliary heat dissipation device, and the dust cleaning device are all installed in the limited space inside the engine hood without affecting the original system arrangement structure. The heat insulation plate is arranged on the inside of the engine hood to cooperate with the high-temperature zone inside the engine hood to isolate the high-temperature zone from the non-high-temperature zone, so as to prevent flammable materials in the environment from entering the high-temperature zone and accumulating around the post-processing and supercharger housing during operation. The protective plate is installed around the post-processing tank body and is a ring structure to block the high temperature of the post-processing tank body and protect other component structures around the post-processing tank body. The auxiliary heat dissipation device is arranged on the inside of the engine hood to cool down the high-temperature components such as the post-processing and supercharger housing and the exhaust manifold by diverting cooling air. The dust cleaning device is arranged on the side of the heat insulation plate to regularly clean and discharge dust, catkins, straw, weeds and other flammable debris discharged from the inside of the engine hood to solve the above-mentioned problems.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a high-temperature fire protection system for the engine compartment of a loader, including: a heat insulation plate, a protective plate, an engine hood, an auxiliary heat dissipation device, and a dust cleaning device. The engine hood is installed on the engine compartment of the loader, and the heat insulation plate is installed on the inside of the engine hood to separate the high-temperature area inside the engine hood from the non-high-temperature area. The protective plate is wrapped on the post-processing tank in the engine compartment of the loader to block the high temperature of the post-processing tank. The auxiliary heat dissipation device is arranged in the high-temperature zone to dissipate heat at the post-processing tank body, and the dust cleaning device is arranged in the high-temperature zone to clean up the debris accumulated around the post-processing tank body.

[0006] Furthermore, the high temperature area inside the engine hood is the area where the post-processing tank and the engine are set in the engine compartment of the loader, and the non-high temperature area is the area where the radiator assembly is set in the engine compartment of the loader.

[0007] Furthermore, the protective plate is an annular structure, wrapped around the post-processing tank, and is used to prevent high temperature from igniting debris around the post-processing tank.

[0008] Furthermore, the insulation board is a multi-layer composite high temperature resistant insulation material.

[0009] Furthermore, the heat insulation board includes: a metal plate, a heat insulation material, and a fireproof metal plate, and the heat insulation material is arranged between the metal plate and the fireproof metal plate.

[0010] Furthermore, the metal plate in the heat insulation board is arranged in the non-high temperature zone, and the fireproof metal plate is arranged in the high temperature zone.

[0011] Furthermore, a sealing strip is provided between the engine hood and the heat insulation board.

[0012] Furthermore, the auxiliary heat dissipation device establishes a branch or a separate heat dissipation fan for the air outlet of the radiator assembly.

[0013] Furthermore, the cooling fan is driven by electric, hydraulic or power take-off engine gear train.

[0014] Furthermore, the dust cleaning device is an air outlet pipe connected to the air storage tank, the air outlet pipe is provided with a solenoid valve, and the solenoid valve is connected to the vehicle-mounted control system.

[0015] The dust cleaning device can also be an air pump with an air outlet pipe, the air inlet of the air pump is connected to the external air through a pipeline, and the driving mode of the air pump is electric, hydraulic or power take-off engine gear train.

[0016] Furthermore, the outlet pipe is provided with a plurality of branch openings at the end of the high temperature zone, and the branch openings are provided around the post-processing tank to clean up the debris accumulated around the post-processing tank body and avoid the risk of ignition by high temperature.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1) The high-temperature area inside the engine hood is separated from the non-high-temperature area front and back by using a heat insulation board, and then the high-temperature area inside the engine hood is separated from the outside. The heat insulation board is a multi-layer composite high-temperature insulation material to prevent flammable and combustible debris in the working environment from entering the high-temperature area and causing fire hazards;

[0019] 2) By installing a protective plate on the post-processing tank, the protective plate can prevent debris from entering the post-processing high-temperature area and accumulating. At the same time, the protective plate can block the heat of the post-processing and protect the remaining structures around the post-processing tank of the engine hood. The protective plate can block the high temperature of the post-processing tank and prevent flammable debris from entering the high-temperature area during the operation of the whole machine, thereby reducing the potential fire hazard;

[0020] 3) External air is introduced into the high-temperature area inside the engine hood through auxiliary heat dissipation devices to dissipate heat, promote effective convection heat dissipation in the high-temperature area, and at the same time pressurize the high-temperature area inside the engine hood to form positive pressure and prevent combustibles from being sucked in.

[0021] 4) The cleaning device is installed around the engine compartment. According to the set program, it uses high-pressure gas to remove the debris around the aftertreatment tank in the engine compartment, avoiding the risk of ignition due to high temperature;

[0022] 5) This system does not affect the original system structure and position inside the engine hood, makes rational use of the space inside the engine hood, and solves the hidden danger of fire caused by excessive temperature of internal components of the engine hood due to accumulation of combustibles under specific working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall schematic diagram of an embodiment of the utility model;

[0024] Figure 2 yes Figure 1 Schematic diagram of the structure with the engine hood removed;

[0025] Figure 3 yes Figure 2 The left schematic diagram of

[0026] Figure 4 is a schematic diagram of the cross section of the heat insulation board;

[0027] In the figure: 1. engine hood; 2. dust cleaning device; 3. auxiliary heat dissipation device; 4. heat insulation board; 5. protective plate; 51. metal plate; 52. heat insulation material; 53. fireproof metal plate; 6. sealing strip. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the scope of the utility model.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] like Figure 1-3 As shown, a high-temperature fire protection system for a loader engine compartment includes: a heat insulation plate 4, a protective plate 5, an engine hood 1, an auxiliary heat dissipation device 3, and a dust cleaning device 2. The engine hood 1 is installed on the loader engine compartment, the heat insulation plate 4 is installed on the inner side of the engine hood 1 to separate the high-temperature area inside the engine hood 1 from the non-high-temperature area, the protective plate 5 is wrapped on the post-processing tank in the loader engine compartment to block the high temperature of the post-processing tank, the auxiliary heat dissipation device 3 is arranged in the high-temperature area to dissipate heat at the post-processing tank body, and the dust cleaning device 2 is arranged in the high-temperature area to clean up the debris accumulated around the post-processing tank body.

[0031] The high temperature area inside the engine hood 1 is the area where the aftertreatment tank and the engine are set in the engine compartment of the loader, and the non-high temperature area is the area where the radiator assembly is set in the engine compartment of the loader.

[0032] like Figure 4 As shown, the insulation board 4 is a multi-layer composite high-temperature resistant insulation material, and the insulation board 4 includes: a metal plate 51, an insulation material 52, and a fireproof metal plate 53. The insulation material 52 is arranged between the metal plate 51 and the fireproof metal plate 53. The metal plate 51 in the insulation board 4 is arranged in a non-high-temperature zone, and the fireproof metal plate 53 is arranged in a high-temperature zone.

[0033] The outer contour of the heat insulation board 4 is in close contact with the inner wall of the engine hood 1, and a sealing strip 6 is sandwiched between the two. Through the cooperation of the heat insulation board 4 and the engine hood 1, the high temperature area where the engine is located inside the engine hood 1 is separated from the non-high temperature area, preventing flammable and combustible materials in the environment from falling into the engine during the operation of the whole machine. At the same time, the heat insulation board 4 is arranged on the inner side of the engine hood 1, between the engine and the radiator, which can effectively prevent the radiator fan from blowing the combustible impurities in the engine hood 1 to the high temperature area where the engine is located during the operation of the engine, thereby preventing the formation of fire hazards.

[0034] like Figure 2-3 As shown, the protective plate 5 is an annular structure, wrapped around the post-processing tank, and is used to prevent high temperature from igniting debris around the post-processing tank.

[0035] The protective plate 5 has the same shape as the post-processing tank body, which is a circumferential shell structure with a size slightly larger than the post-processing tank body. It is sleeved on the axial outer side of the post-processing tank body to play a protective role, which can prevent the high temperature of the post-processing from radiating to the range outside the radial direction of the protective plate 5. At the same time, the protective plate 5 has protection and diversion functions, which can guide the debris falling from the top of the post-processing to the two sides to prevent the debris from accumulating around the post-processing tank body, affecting the heat dissipation and causing high temperature, thereby avoiding poor heat dissipation of the post-processing tank body. Due to the shielding effect of the protective plate 5 on the thermal radiation of the tank body, the air filter, wiring harness and other structures in the engine hood 1 can also be protected from high temperature scorching, thereby extending the service life.

[0036] like Figure 2 As shown, the auxiliary heat dissipation device 3 is a branch established for the radiator assembly outlet, and a branch is established through the radiator assembly outlet to guide the air-cooled airflow into the high-temperature area in the engine hood 1, and the high-temperature components such as the tank body and the supercharger housing are cooled.

[0037] The auxiliary heat dissipation device 3 can also be a separate heat dissipation fan, the air inlet of which is connected to the outside air through an air duct, and the heat dissipation fan is driven by electric, hydraulic or power take-off engine gear train to drive the heat dissipation fan to assist the heat dissipation of the high temperature area in the engine hood 1;

[0038] Since the engine hood 1 and the heat shield 4 form a closed space, the airflow introduced by the auxiliary heat dissipation device 3 will form a positive pressure in the closed space, thereby preventing flammable and combustible materials in the working environment from being sucked into the engine hood 1.

[0039] like Figure 2 As shown, the dust cleaning device 2 is an air outlet pipe connected to the air storage tank, and a solenoid valve is provided on the air outlet pipe, and the solenoid valve is connected to the vehicle-mounted control system.

[0040] The dust cleaning device 2 can also be an air pump with an air outlet pipe, the air inlet of the air pump is connected to the external air through a pipeline, the air pump is driven by electric, hydraulic or power take-off engine gear train, and the air pump is connected to the vehicle control system.

[0041] The outlet pipe of the cleaning device 2 is provided with a plurality of branch ports at the end of the high temperature zone, and the branch ports are arranged around the post-processing tank to clean up the debris accumulated around the post-processing tank body, avoiding the risk of ignition by high temperature.

[0042] The cleaning device 2 is installed and arranged on the inner side of the engine hood 1, and works together with the above-mentioned insulation board 4 and protective plate 5 to prevent the accumulation of flammable and combustible materials in the engine hood 1. When the passive dust and dust prevention effects of the insulation board 4 and the protective plate 5 are affected by the working conditions or usage, the cleaning device 2 drains the high-pressure gas to the surface of the post-processing tank and the supercharger shell, and removes the flammable and combustible materials on the high-temperature shell surface through high-pressure gas or other physical methods, so as to prevent high temperature caused by poor heat dissipation of the two and prevent fire hazards.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high temperature fire protection system for a loader engine compartment, characterized in that: include: Heat insulation board, protective plate, engine hood, auxiliary heat dissipation device, and dust cleaning device. The engine hood is installed on the engine compartment of the loader. The heat insulation board is installed on the inside of the engine hood to separate the high-temperature area inside the engine hood from the non-high-temperature area. The protective plate is wrapped on the post-processing tank in the engine compartment of the loader to block the high temperature of the post-processing tank. The auxiliary heat dissipation device is arranged in the high-temperature area to dissipate heat at the post-processing tank body. The dust cleaning device is arranged in the high-temperature area to clean up the debris accumulated around the post-processing tank body.

2. A loader engine compartment high temperature fire protection system according to claim 1, characterized in that: The high temperature area inside the engine hood is the area where the aftertreatment tank and the engine are set in the loader engine compartment, and the non-high temperature area is the area where the radiator assembly is set in the loader engine compartment.

3. A loader engine compartment high temperature fire protection system according to claim 1, characterized in that: The protective plate is an annular structure, wrapped around the post-processing tank, and is used to prevent high temperature from igniting debris around the post-processing tank.

4. A loader engine compartment high temperature fire protection system according to claim 1, characterized in that: The insulation board is a multi-layer composite high temperature resistant insulation material.

5. A loader engine compartment high temperature fire protection system according to claim 4, characterized in that: The insulation panels include: A metal plate, a heat insulating material, and a fireproof metal plate, wherein the heat insulating material is arranged between the metal plate and the fireproof metal plate.

6. A loader engine compartment high temperature fire protection system according to claim 5, characterized in that: The metal plate in the heat insulation board is arranged in the non-high temperature zone, and the fireproof metal plate is arranged in the high temperature zone.

7. A loader engine compartment high temperature fire protection system according to claim 1, characterized in that: A sealing strip is provided between the engine hood and the heat shield.

8. A loader engine compartment high temperature fire protection system according to claim 1, characterized in that: The auxiliary heat dissipation device establishes a branch or a separate heat dissipation fan for the air outlet of the radiator assembly.

9. A loader engine compartment high temperature fire protection system according to claim 8, characterized in that: The cooling fan is driven by electric, hydraulic or power take-off engine gear train.

10. A loader engine compartment high temperature fire protection system according to claim 1, characterized in that: The dust cleaning device is an air outlet pipe connected to the air storage tank, and a solenoid valve is arranged on the air outlet pipe, and the solenoid valve is connected to the vehicle-mounted control system.

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