An integrated fireproof cover structure for non-road diesel engines

Abstract

An integrated fireproof cover structure for non-road diesel engines, belonging to the engine field, is disclosed. This fireproof cover structure uses high-temperature resistant basalt fabric, combined with locally thickened aluminum foil lining to enhance strength. The thickened aluminum foil lining is distributed around the perimeter of the fireproof cover and at sharp protruding parts. Through contour-following design, it achieves comprehensive protection for components such as the turbocharger, exhaust pipe, cover, and injectors on the upper part of the diesel engine assembly. It solves the problems of poor sealing and ineffective application of existing fireproof covers. Through innovative combination of materials, the fireproof cover material possesses advantages such as high temperature resistance, softness, fit, and good breathability. After overall installation, it provides excellent breathability, high fire resistance, and strong self-cleaning ability. The partially open structure effectively addresses the needs of protruding and externally connected structures. High-temperature resistant Velcro fasteners restore and fix the open parts to ensure sealing performance. The application of this structure can significantly reduce the risk of fire in the diesel engine itself.

Description

Technical Field

[0001] This invention belongs to the field of non-road internal combustion engine technology, specifically relating to an integrated fireproof cover structure for non-road diesel engines. Background Technology

[0002] As is well known, non-road diesel engines, as core power units in agriculture, engineering, mining, and other fields, operate in environments characterized by high temperatures, high dust levels, and high concentrations of flammable materials. These diesel power units are suitable for operation in high-dust, flammable environments such as agricultural machinery, engineering machinery, mining equipment, port machinery, and forestry equipment. Due to the harsh operating environment of non-road diesel engines, large amounts of dust and straw fragments are easily generated during operation. During crop harvesting seasons or in dry operating conditions, large quantities of dry straw, crop debris, grass clippings, wood chips, and dust are dispersed by the wind and easily adhere to the surfaces of high-temperature components such as the engine cylinder head, exhaust pipe, turbocharger, and fuel injectors. The ignition point of straw fragments is 200-300℃. Straw fragments accumulated on the upper part of the diesel engine, under prolonged exposure to the high temperature of the cylinder head, can easily ignite at around 200℃. During diesel engine operation, the surface temperature of key components generally exceeds 300℃, and in some areas (such as the exhaust manifold and turbocharger housing), the temperature can even reach over 600℃, posing a significant fire hazard. It can easily cause damage to the engine and other components, posing a very high potential risk.

[0003] The protection of the upper part and surrounding area of ​​a diesel engine has always been a key focus for both diesel engine manufacturers and complete machine manufacturers. Most complete machine manufacturers design air ducts based on the engine fan location and install baffles at the top of the engine to prevent debris generated by upper working parts from falling onto the diesel engine. However, some fine dust and particles can still accumulate and ignite in the upper part of the diesel engine through the gap between the radiator cover and the radiator core, via airflow.

[0004] The State Intellectual Property Office of China published a utility model patent on October 3, 2012, with application number 201220095274X and publication number CN20246024U, filed on March 14, 2012. This patent application discloses a "diesel engine fireproof cover," comprising: a handwheel, an end bracket, a bottom bracket, a middle bracket, and a cover. The upper parts of the end bracket and the middle bracket are fixed to the edge of the diesel engine cylinder head, and their bottoms are bolted to the bottom bracket, which is fixed to the side of the engine body. The lower part of the cover is inserted into a slot in the bottom bracket. The lower part of the cover, the end bracket, and the middle bracket are fixed by the handwheel. A shock-absorbing rubber strip is provided along the bottom edge of the cover. This fireproof cover employs a fully enclosed structure and provides a certain degree of fire and dust protection.

[0005] The fire protection measures commonly used in the aforementioned existing technologies still have significant drawbacks: 1. Metal protective covers have poor sealing performance and are difficult to fit completely with the complex curved surface of the diesel engine. Dust can easily enter the channel through the gaps, limiting heat dissipation and causing the diesel engine to overheat. Moreover, they are heavy and the screws are prone to loosening and falling off due to vibration. Maintenance requires complete disassembly, which is time-consuming and labor-intensive. 2. Non-metallic protective covers, such as plastic or fiber materials, have insufficient high-temperature resistance. They are prone to aging and embrittlement when exposed to high-temperature environments for a long time, resulting in poor protection reliability. 3. Simple protective nets can only block larger particles and are ineffective against fine dust. They are also prone to accumulation and blockage, affecting heat dissipation and maintenance.

[0006] Therefore, there is an urgent need to develop an integrated fireproof cover structure that takes into account fire resistance, heat dissipation efficiency, lightweight, adaptability and long-term reliability in order to meet the special operating conditions of non-road diesel engines. Summary of the Invention

[0007] The purpose of this invention is to provide a compact, robust, reliable, and practical integrated fireproof cover structure for non-road diesel engines. This fireproof cover structure uses high-temperature resistant basalt fabric, reinforced with thickened aluminum foil lining in certain areas to enhance strength. The thickened aluminum foil lining is distributed along the four perimeters of the fireproof cover and at sharp protruding parts. Based on the structure of the four high-temperature risk components of the upper part of the diesel engine—the cover, injector, exhaust pipe, and turbocharger—a contour-following design is used to ensure a close fit between the fireproof cover and the upper structure of the diesel engine after installation, providing robust protection and facilitating installation.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an integrated fireproof cover structure for non-road diesel engines, comprising: an integrated fireproof cover, a diesel engine assembly, a diesel engine fan, basalt dense woven fabric, partial openings, a fastening assembly, cotter pins, gaskets, thickened aluminum foil, and high-temperature resistant Velcro; the integrated fireproof cover is installed on the upper part of the diesel engine assembly, and is made of basalt dense woven fabric cut and sewn together, with thickened aluminum foil added to the reinforced parts, and partial openings provided at the protruding external connecting pipe parts, with high-temperature resistant Velcro arranged at the partial openings; the lower edge of the integrated fireproof cover is secured to the diesel engine assembly by a fastening assembly composed of cotter pins and gaskets, and the fastening assembly is connected and fixed to the diesel engine assembly with wire, and a diesel engine fan is installed at the front of the diesel engine assembly.

[0009] The overall fireproof cover includes: a cover and injector protection, an exhaust pipe protection, and a turbocharger high-temperature zone protection; the cover and injector protection and the exhaust pipe protection are arranged side by side, and the turbocharger high-temperature zone protection is above the exhaust pipe protection, and the cover and injector protection, the exhaust pipe protection, and the turbocharger high-temperature zone protection are connected by stitching.

[0010] The diesel engine assembly includes: a turbocharger, an exhaust pipe, a cover, and a fuel injector; the turbocharger is bolted to the exhaust pipe, the exhaust pipe is bolted to the cylinder head of the diesel engine assembly, the cover is bolted to the cylinder head of the diesel engine assembly, and the fuel injector is bolted to the cylinder head of the diesel engine assembly.

[0011] The thickened aluminum foil cloth includes: an inner lining for the exhaust pipe area, an inner lining for the cover area, and an inner lining for the injector area; the inner lining for the exhaust pipe area is the inner lining at the lower edge of the exhaust pipe periphery, the inner lining for the cover area is the inner lining at the lower edge of the cover periphery and the area facing the fan, the inner lining for the injector area is the inner lining corresponding to the injector area of ​​the overall fireproof cover, and the inner lining for the exhaust pipe area, the inner lining for the cover area, and the inner lining for the injector area are all components of the inner lining of the overall fireproof cover.

[0012] The partial opening includes: basalt dense woven fabric and high-temperature resistant hook and loop fasteners; the basalt dense woven fabric is designed to overlap at the opening position, and the two layers of the overlapping part are sewn together with the high-temperature resistant hook and loop fasteners, and the high-temperature resistant hook and loop fasteners are combined to firmly connect the overlapping part of the opening.

[0013] The fastening assembly includes: basalt dense woven fabric, cotter pin, gasket, and thickened aluminum foil; holes are punched at the overlapping part of the basalt dense woven fabric and the thickened aluminum foil; a gasket is installed on each side of the composite fabric of basalt dense woven fabric and thickened aluminum foil; the upper gasket, the thickened aluminum foil, the basalt dense woven fabric, and the lower gasket are fixed together by the cotter pin.

[0014] The present invention, by adopting the above-mentioned technical solution, achieves the following positive effects: From a practical use perspective, the overall fireproof cover uses a combination of basalt densely woven fabric and thickened aluminum foil fabric. Through contour-following design, it achieves comprehensive protection for components such as the turbocharger, exhaust pipe, cover, and fuel injectors on the upper part of the diesel engine assembly. The basalt densely woven fabric can effectively prevent straw fragments and other debris from contacting the components on the upper part of the diesel engine. Simultaneously, the basalt densely woven fabric is high-temperature resistant, structurally tough, and durable. The dense weaving process effectively prevents straw fragments and other debris from passing through, while also providing good air permeability, thus not affecting the heat dissipation of the components on the upper part of the diesel engine and preventing heat accumulation. The basalt densely woven fabric is a high-temperature resistant polyester fiber fabric, similar to cloth in that it has good softness and conformability. Combined with the locally thickened aluminum foil lining, it can achieve local shaping, improve strength and wear resistance, and significantly enhance the local three-dimensional performance and protective performance. The partially open structure effectively solves the needs of protruding and external connection structures, and the high-temperature resistant Velcro fasteners restore and fix the open area to ensure sealing performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation structure of an integrated fireproof cover for non-road diesel engines according to the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of a diesel engine assembly requiring protection, which is based on the integrated fireproof cover structure for non-road diesel engines according to the present invention.

[0017] Figure 3 This is a schematic diagram of the corresponding protected parts of an integrated fireproof cover structure for non-road diesel engines according to the present invention;

[0018] Figure 4 This is a schematic diagram of the fireproof cover composition for an integrated fireproof cover structure for non-road diesel engines according to the present invention;

[0019] Figure 5 This is a schematic diagram showing the position of the aluminum foil lining of the fireproof cover for an integrated fireproof cover structure for non-road diesel engines according to the present invention.

[0020] Figure 6 This is a partial structural diagram of a fixing buckle for an integrated fireproof cover structure for non-road diesel engines according to the present invention;

[0021] Figure 7 This is a schematic diagram of a partially open structure of an integrated fireproof cover for non-road diesel engines according to the present invention. The markings in the diagram are: 1-Integrated fireproof cover, 1.1-Cover and injector area protection, 1.2-Exhaust pipe area protection, 1.3-Turbocharger high-temperature zone protection, 2-Diesel engine assembly, 2.1-Turbocharger, 2.2-Exhaust pipe, 2.3-Cover, 2.4-Injector, 3-Diesel engine fan, 4-Basalt dense woven fabric, 5-Partial opening; 6-Fixing buckle assembly, 7-Cotter pin, 8-Gasket, 9-Thickened aluminum foil, 9.1-Exhaust pipe area lining, 9.2-Cover area lining, 9.3-Injector area lining, 10-High-temperature resistant Velcro. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. For example... Figures 1-7 As shown, an integrated fireproof cover structure for non-road diesel engines includes: an integrated fireproof cover 1, a cover and injector area protection 1.1, an exhaust pipe area protection 1.2, a turbocharger high-temperature zone protection 1.3, a diesel engine assembly 2, a turbocharger 2.1, an exhaust pipe 2.2, a cover 2.3, an injector 2.4, a diesel engine fan 3, basalt dense woven fabric 4, a partial opening 5, a fastening buckle assembly 6, a cotter pin 7, a gasket 8, thickened aluminum foil 9, an exhaust pipe area lining 9.1, a cover area lining 9.2, an injector area lining 9.3, and a high-temperature resistant Velcro 10.

[0023] The overall fireproof cover 1 is mainly composed of basalt densely woven fabric 4 and thickened aluminum foil fabric 9, which are designed to combine soft fiber fabric and molded high-temperature resistant thickened aluminum foil fabric. Both are high-temperature resistant materials with different degrees of softness and hardness. The fireproof cover designed for combined application has the characteristics of being soft and fit well and moderately shapely, reflecting the core characteristics of the fireproof cover assembly such as fit, conformal orientation, and tight protection. At the external connection of pipelines or structural interference, a partial opening structure 5 is used to treat the structure, and high-temperature resistant Velcro 10 is used to achieve a close fit at the root of the external pipeline, effectively ensuring the protective performance, such as the performance of an integrated structure. Through this combination of innovative material design and local structural treatment method, the composite material of the overall fireproof cover 1 has the basic functions of conformal design and tailored application.

[0024] The contour-following design of the overall fireproof cover 1 mainly targets the relevant parts on the upper part of the diesel engine assembly 2, namely the turbocharger 2.1, exhaust pipe 2.2, cover 2.3, and injector 2.4. The turbocharger 2.1, exhaust pipe 2.2, cover 2.3, and injector 2.4 are all adjacent parts on the upper part of the diesel engine assembly 2 that require protection due to high temperature risks. During the contour-following design, these four parts are structurally disassembled, and contour-following covers are designed separately for each part. The fireproof cover for the turbocharger 2.1 provides protection for the high-temperature zone 1.3, the fireproof cover for the exhaust pipe 2.2 provides protection for the exhaust pipe area 1.2, and the cover 2.3 and injector 2.4 are designed as an integrated fireproof cover for the cover and injector area protection 1.1. The cover and injector area protection 1.1, the exhaust pipe area protection 1.2, and the turbocharger high-temperature zone protection 1.3 are then stitched together to form the complete fitted shape of the overall fireproof cover 1. The protection of the cover and injector parts 1.1 is based on the contour design of the cover 2.3 and the injector 2.4. The protection of the exhaust pipe part 1.2 is based on the contour design of the exhaust pipe 2.2. The protection of the high temperature area of ​​the turbocharger 1.3 is based on the contour design of the turbocharger 2.1. These contour designs are the key means of ensuring tight and close protection.

[0025] The thickened aluminum foil lining 9 is designed based on practical application tests and analysis, with lining material added to three areas: the exhaust pipe area (lining 9.1), the cover area (lining 9.2), and the injector area (lining 9.3). The exhaust pipe area lining 9.1 and the cover area lining 9.2 ensure vertical structural strength and a tight fit and seal around the exhaust pipe 2.2 and cover 2.3, preventing debris from entering the fireproof cover 1 at the lower edges corresponding to the exhaust pipe 2.2 and cover 2.3. Combined with the fixing buckle assembly 6, this ensures the overall fireproof cover 1 is stable and reliable, achieving a taut top and a snug bottom installation. The cover area lining 9.2 prevents the basalt woven fabric 4 from shifting in the wind, causing material loosening and uneven gaps. The injector area lining 9.3 increases the strength of the sharp upper part of the injector, improving wear resistance and the overall lifespan of the fireproof cover.

[0026] The fixing buckle assembly 6 is located at the overlap of the basalt dense woven fabric 4 and the thickened aluminum foil fabric 9. With the reinforcement of the gaskets 8 on both sides of the basalt dense woven fabric 4 and the thickened aluminum foil fabric 9, it is fixed by the cotter pin 7 to ensure the reliability of the fixing point of the overall fireproof cover 1.

[0027] The part of the partial opening 5 has a certain width of overlap with the basalt dense woven fabric 4. The two sides of the overlapping area are fixed with high temperature resistant Velcro 10, which can be glued and reset after the overall fireproof cover 1 is assembled. This ensures that the protruding parts or the perimeter of the pipes are tightly fitted, preventing small debris from entering the interior of the overall fireproof cover 1 through the gaps and causing the fireproof cover to fail.

[0028] In this embodiment, the integral fireproof cover 1 is composed of basalt densely woven fabric 4 and thickened aluminum foil fabric 9. Its overall features, through contour-following design, effectively protect the turbocharger 2.1, exhaust pipe 2.2, cover 2.3, and injector 2.4. Multiple partial openings 5 ​​achieve structural avoidance and sealing, and multiple fixing assemblies 6 ensure the integral fireproof cover 1 is fixed and maintained in position after installation. The integral fireproof cover 1 is installed on the diesel engine assembly 2, forming effective protection for the four high-temperature areas of the turbocharger 2.1, exhaust pipe 2.2, cover 2.3, and injector 2.4, eliminating the risk of fire.

[0029] The integral fireproof cover 1 is installed on the upper part of the diesel engine assembly 2. After installation, due to the fixing and stretching effect of the fixing buckle assembly 6, the upper part of the integral fireproof cover 1 is tightened and closely fits the parts of the diesel engine assembly 2, resulting in a flat and smooth effect on the upper part of the diesel engine assembly 2, which helps to avoid the accumulation of debris.

[0030] Based on actual tests of the overall structure, stress, and wind resistance of the fireproof cover 1, the thickened aluminum foil cloth 9 has been reinforced in three areas: the exhaust pipe area lining 9.1, the cover area lining 9.2, and the injector area lining 9.3.

[0031] The partial opening 5 is structurally designed so that the high-temperature resistant Velcro 10 is used to fix and restore the seam position of the basalt dense woven fabric 4.

[0032] The fixing assembly 6 consists of a cotter pin 7 that passes through a gasket 8, a basalt woven fabric 4, and a thickened aluminum foil 9 in sequence. The gasket 8 enables the four layers of parts to be joined and fixed. The gasket 8 can increase the force-bearing area of ​​the fixing point, improve the tensile strength during fixing, and make the fixing more secure.

[0033] In an embodiment of the integrated fireproof cover structure for non-road diesel engines of the present invention: the design concept combines basalt densely woven fabric 4 (a non-metallic high-temperature resistant fiber material) and thickened aluminum foil fabric 9. Compared with traditional metal fireproof boards, basalt densely woven fabric 4 has advantages such as good conformability, high fit to the top of complex diesel engines, and small gaps in the sealing positions around the perimeter. Basalt densely woven fabric 4 has good structural strength, durability, and breathability. The small pores can effectively prevent fine particles and debris from entering the protected area, avoiding the risk of fire caused by contact with high-temperature components. After the integrated fireproof cover 1 is installed, the upper part of the diesel engine assembly 2 has a simple overall structure and smooth outline. With the airflow of the diesel engine fan 3, the upper part of the diesel engine can be kept clean and tidy for a long time, thereby avoiding the need for frequent manual cleaning and maintenance of the upper part of the engine, achieving a maintenance-free effect within one operating quarter. The overall fireproof cover 1 is made of breathable basalt dense woven fabric 4, which can ensure the heat dissipation needs of the upper part of the diesel engine, will not block the heat from dissipating from the top, and will not affect the heat dissipation of components such as wiring harnesses and injector electrical valves on the diesel engine cylinder head, thus ensuring the reliability and durability of electrical components.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of the present invention with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the claims of this application.

Claims

1. An integrated one-piece fire shield structure for off-highway diesel engines, comprising: The whole fireproof cover (1), diesel engine assembly (2) and diesel engine fan (3), characterized by: the whole fireproof cover (1) is installed on the upper part of the diesel engine assembly (2), the whole fireproof cover (1) is cut and sewn by basalt dense cloth (4), the local reinforced part increases the inner lining of thickened aluminum foil cloth (9), the local opening (5) is arranged at the protruding outer pipeline part, and the high-temperature-resistant magic tape (10) is arranged at the local opening (5) part; the lower edge part of the whole fireproof cover (1) is provided with a fixed buckle assembly (6), the fixed buckle assembly (6) is fixed on the diesel engine assembly (2) by iron wire connection, and the diesel engine fan (3) is installed at the front part of the diesel engine assembly (2); The whole fireproof cover (1) comprises: cover and fuel injector part protection (1.1), exhaust pipe part protection (1.2) and supercharger high temperature area protection (1.3); the cover and fuel injector part protection (1.1) and the exhaust pipe part protection (1.2) are arranged side by side, the supercharger high temperature area protection (1.3) is above the exhaust pipe part protection (1.2), and the cover and fuel injector part protection (1.1), the exhaust pipe part protection (1.2) and the supercharger high temperature area protection (1.3) are connected by sewing; the upper part of the whole fireproof cover (1) is tensioned and flattened, and the lower part is attached to the diesel engine assembly (2); The thickened aluminum foil cloth (9) comprises: exhaust pipe area lining (9.1), cover area lining (9.2) and fuel injector area lining (9.3); the exhaust pipe area lining (9.1) is the lining of the lower edge part around the exhaust pipe (2.2), the cover area lining (9.2) is the lining of the lower edge around the cover (2.3) and the area opposite to the fan surface, and the fuel injector area lining (9.3) is the lining of the area corresponding to the fuel injector (2.4) of the whole fireproof cover (1); all the linings of the whole fireproof cover (1) are composed of the exhaust pipe area lining (9.1), the cover area lining (9.2) and the fuel injector area lining (9.3); The local opening (5) comprises: basalt dense cloth (4) and high-temperature-resistant magic tape (10); the basalt dense cloth (4) is designed to overlap at the opening position, and the two surfaces of the overlapping area are fixed by the high-temperature-resistant magic tape (10); The fixed buckle assembly (6) comprises: basalt dense cloth (4), split pin (7), gasket (8) and thickened aluminum foil cloth (9); holes are punched at the overlapping parts of the basalt dense cloth (4) and the thickened aluminum foil cloth (9), one gasket (8) is arranged on the two sides of the composite cloth of the basalt dense cloth (4) and the thickened aluminum foil cloth (9) respectively, and the four layers of the upper gasket (8), the thickened aluminum foil cloth (9), the basalt dense cloth (4) and the lower gasket (8) are fixed together by the split pin (7).

2. An integrated fire shield structure for non-road diesel engine according to claim 1, characterized in that: The diesel engine assembly (2) comprises: a supercharger (2.1), an exhaust pipe (2.2), a cover (2.3), an oil injector (2.4); the supercharger (2.1) is assembled to the exhaust pipe (2.2) by bolts, the exhaust pipe (2.2) is installed to the cylinder cover of the diesel engine assembly (2) by bolts, the cover (2.3) is installed to the cylinder cover of the diesel engine assembly (2) by bolts, and the oil injector (2.4) is installed to the cylinder cover of the diesel engine assembly (2) by thread connection.

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