Air-to-air fire-retardant air inlet system

Abstract

The utility model discloses an air-to-air fire-retardant air inlet system, which belongs to the technical field of vehicle engines and comprises an air inlet transverse through pipe and an air inlet fire-retardant gate which are sequentially connected, an air outlet of the air inlet transverse through pipe is in butt joint with an air inlet of the air inlet fire-retardant gate, and the air inlet fire-retardant gate comprises a fire-retardant gate and a shell outside the fire-retardant gate. And an air outlet of the air inlet fire-retardant gate is arranged at one corner of the top of the shell. By installing the air inlet fire barrier at the outlet of the air inlet transverse through pipe, flames in the air cylinder can be prevented from returning to the air inlet transverse through pipe and entering the atmosphere, and inflammable gas in the working environment is prevented from being ignited; the fire-retardant fence is integrated in the shell, and the air outlet of the air inlet fire-retardant fence is formed in the corner of the top of the shell, so that the air inlet resistance can be reduced while the explosion-proof effect is achieved. The explosion-proof engine has the advantages of being simple in structure, small and exquisite in size and good in explosion-proof performance, the internal space can be reasonably utilized, the overall structure is more compact, and the structure and performance of the engine are optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle engines, and particularly relates to an air-to-air fire-retardant air intake system. Background Art

[0002] The air intake system of the engine is set at the inlet of the cylinder. Its main function is to supply sufficient and stable air to the engine to meet the needs of the engine. The existing diesel engine air intake system is not equipped with explosion-proof facilities. If the vehicle enters an environment filled with flammable gases in the air, the flame in the cylinder may return to the atmosphere along the air intake system, which is very likely to cause an explosion and even cause a tragedy of vehicle destruction and death. Therefore, in order to improve the safety performance of the engine, it is necessary to develop a new air intake system to improve the explosion-proof performance of the engine. Utility Model Content

[0003] In order to solve the above problems, the utility model provides an air-to-air fire-retardant air intake system.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] An air-to-air fire-blocking air intake system comprises an air intake cross-through pipe and an air intake fire-blocking grille which are connected in sequence, wherein the air inlet of the air intake cross-through pipe is used to be connected to an air intake main pipe, the air outlet of the air intake cross-through pipe is butt-connected to the air inlet of the air intake fire-blocking grille, and the air outlet of the air intake fire-blocking grille is used to be connected to an intercooler; the air intake fire-blocking grille comprises a fire-blocking fence and a shell outside thereof, and the air outlet of the air intake fire-blocking grille is arranged at a top corner of the shell.

[0006] Furthermore, the air inlet of the air inlet fire barrier is arranged on the long side of the shell, the air inlet of the air inlet fire barrier is a long rectangular strip, and the air inlet of the air inlet fire barrier is surrounded by rectangular flanges connected to the air inlet cross-through pipe.

[0007] Furthermore, a connecting plate is provided in the middle of the bottom surface of the shell body for fixing the air intake flame arrester on the engine.

[0008] Furthermore, the air intake cross-duct includes a mounting plate and two air intake channels, the mounting plate is a long rectangular plate, and the edge of the mounting plate can be connected to the rectangular flanges around the air inlet of the air intake fire barrier; the two air intake channels are symmetrically arranged and are L-shaped channels, the air inlets of the two air intake channels are respectively arranged at both ends of the mounting plate, and the outlet ends of the two air intake channels merge into a rectangular air outlet.

[0009] Furthermore, concave inclined surfaces are symmetrically provided on the outer sides of the adjacent long sides of the two air inlet passages.

[0010] Further, a circle of connecting blind holes are provided around the mounting plate, and the connecting blind holes are in threaded fit with fastening bolts for connecting and fixing the mounting plate to the rectangular flange; connecting holes for cooperating with the fastening bolts are provided around the rectangular flange.

[0011] Further, the inlet size of the intake passage is larger than its outlet size.

[0012] Further, both the inlet of the intake passage and the outlet of the intake flame arrester are rectangular, connecting flanges are provided around the inlet of the intake passage and the outlet of the intake flame arrester, and a circle of connecting blind holes are provided on the outer end face of the connecting flange at the outlet of the intake flame arrester.

[0013] Further, the surface roughness of the inlet end and the outlet end of the intake cross pipe and the inlet end of the intake flame arrester is 3.2.

[0014] Compared with the prior art, the technical progress achieved by the present utility model lies in:

[0015] By installing an intake flame arrester at the outlet of the intake cross pipe, the present utility model can prevent the flame in the cylinder from returning to the intake cross pipe and entering the atmosphere, and avoid igniting the flammable gas in the working environment; the flame arrester fence is integrated inside the housing, and the outlet of the intake flame arrester is arranged at the corner of the top of the housing, which can not only play an explosion-proof role, but also reduce the intake resistance. The present utility model has the advantages of simple structure, small size and good explosion-proof performance, can reasonably utilize the internal space, make the overall structure more compact, and optimize the structure and performance of the engine. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model.

[0017] In the drawings:

[0018] Figure 1 is a schematic structural diagram of an air-to-air flame arrester intake system provided by an embodiment of the present utility model;

[0019] Figure 2 is an external view of the intake cross pipe in the embodiment of the present utility model;

[0020] Figure 3 is Figure 2 the front view of the intake cross pipe in

[0021] Figure 4 is Figure 3 the top view of the intake cross pipe in

[0022] Figure 5 isFigure 3 Left view of the middle air intake cross pipe;

[0023] Figure 6 External view of the air intake flame arrester in the embodiment of the present utility model;

[0024] Figure 7 is Figure 6 Top view of the middle air intake flame arrester;

[0025] Figure 8 is Figure 6 Bottom view of the middle air intake flame arrester;

[0026] Figure 9 is Figure 6 Rear view of the middle air intake flame arrester.

[0027] In the figure:

[0028] 1 - Middle air intake cross pipe, 11 - Mounting plate, 12 - Air intake passage, 13 - Inclined plane, 14 - Rib plate; 2 - Air intake flame arrester, 21 - Flame arrester fence, 22 - Housing; 3 - Rectangular flange; 4 - Connecting plate; 5 - Connecting hole; 6 - Connecting flange; 7 - Connecting blind hole. Specific embodiments

[0029] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present utility model will be described below with reference to the accompanying drawings.

[0030] As Figure 1 、 Figure 2 、 Figure 6 shown, an air - air flame - arrester intake system includes an air intake cross pipe 1 and an air intake flame arrester 2 connected in sequence. The air intake of the air intake cross pipe 1 is used to connect with an air intake main pipe (not shown in the figure), the air outlet of the air intake cross pipe 1 is butt - connected with the air intake of the air intake flame arrester 2, and the air outlet of the air intake flame arrester 2 is used to connect with an inter - cooler (not shown in the figure); the air intake flame arrester 2 includes a flame arrester fence 21 and its external housing 22, and the air outlet of the air intake flame arrester 2 is arranged at a corner part of the top of the housing 22. Installing an air intake flame arrester on the passing air intake path can prevent the flame that may return in the cylinder from directly leading to the atmosphere. The flame will go out when passing through the air intake flame arrester, thereby avoiding igniting the flammable gas in the working environment. Installing an air intake flame arrester can improve the explosion - proof performance of the engine and optimize the performance of the engine.

[0031] In a specific embodiment of the present utility model, as Figures 6 - 9As shown, the air inlet of the intake fire arrester grid 2 is arranged on the long side surface of the housing 22. The air inlet of the intake fire arrester grid 2 is a long rectangular shape, and a rectangular flange 3 connected to the intake cross pipe 1 is provided around the air inlet of the intake fire arrester grid 2. Among them, the other side of the housing opposite to the rectangular flange is a detachable side plate. With this structure, it is more convenient to disassemble the fire arrester grid, clean it and then install it to achieve recycling.

[0032] In addition, a connecting plate 4 is provided in the middle of the bottom surface of the housing 22 for fixing the intake fire arrester grid 2 on the engine. With this structure, it is convenient to install the intake fire arrester grid.

[0033] As a preferred structure, as Figures 2 - 5 shown, the intake cross pipe 1 includes a mounting plate 11 and two intake channels 12. The mounting plate 11 is a long rectangular plate, and the edge of the mounting plate 11 can be connected to the rectangular flange 3 around the air inlet of the intake fire arrester grid 2; the two intake channels 12 are symmetrically arranged and are L-shaped channels. The air inlets of the two intake channels 12 are respectively arranged at both ends of the mounting plate 11, and the outlet ends of the two intake channels 12 converge into a rectangular air outlet. Among them, a circle of connecting blind holes is provided around the mounting plate 11, and the connecting blind holes are in threaded cooperation with fastening bolts (not shown in the figure) for connecting and fixing the mounting plate 11 to the rectangular flange 3; connecting holes 5 cooperating with the fastening bolts are provided around the rectangular flange 3. By adopting the L-shaped intake channel, the air flow entering direction can be changed, and at the same time, the path of the air flow is extended, the intake resistance is reduced, and the performance of the engine is optimized.

[0034] To further optimize the above solution, as Figure 2 shown, concave inclined surfaces 13 are symmetrically provided on the outer sides of the adjacent long side parts of the two intake channels 12. With the help of the inclined surfaces, the air flow on both sides can be guided, so that the air flow on both sides crosses and mixes at the air outlet, and after fully contacting the intake fire arrester grid, uniform air intake is realized.

[0035] During specific production, the air inlet size of the intake channel 12 is larger than its air outlet size. At the same time, the air inlets of the intake channels 12 and the air outlet of the intake fire arrester grid 2 are all rectangular, and connecting flanges 6 are provided around the air inlets of the intake channels 12 and the air outlet of the intake fire arrester grid 2. A circle of connecting blind holes 7 is provided on the outer end surface of the connecting flange 6 of the air outlet of the intake fire arrester grid 2, which is convenient to connect and fix the intake fire arrester grid through bolts.

[0036] Furthermore, the surface roughness of the intake end and the outlet end of the intake cross pipe 1 and the intake end of the intake fire arrester grid 2 is all 3.2. With this structure, it is convenient to install gaskets at the intake end and the outlet end, and the sealing performance of the intake system can be guaranteed.

[0037] In summary, the utility model has the advantages of simple structure, small size and good explosion-proof performance, optimizes the structure and performance of the engine. By integrating the flame arrester grid in the housing, connecting the housing to the outlet end of the intake cross pipe and matching their sizes, the overall structure is made more compact. By installing the intake flame arrester, the flame in the engine cylinder can be prevented from returning to the intake passage and igniting the external combustible gas, improving the explosion-proof performance.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the scope of protection of the claims of the present utility model.

Claims

1. An air-empty fireproof intake system, characterized in that: It includes an intake cross-connecting pipe and an intake flame arrester connected in sequence. The intake port of the intake cross-connecting pipe is used to connect with the intake main pipe. The outlet of the intake cross-connecting pipe is butt-connected to the intake port of the intake flame arrester. The outlet of the intake flame arrester is used to connect with the intercooler. The intake flame arrester includes a flame arrester fence and a housing outside it. The outlet of the intake flame arrester is arranged at a corner of the top of the housing.

2. The air-to-air fire-blocking intake system according to claim 1, wherein: The intake port of the intake flame arrester is arranged on the long side surface of the housing. The intake port of the intake flame arrester is a long rectangular shape. A rectangular flange connected to the intake cross-connecting pipe is provided around the intake port of the intake flame arrester.

3. The airspace fire-blocking air intake system according to claim 2, characterized in that: A connecting plate is provided in the middle of the bottom surface of the housing for fixing the intake flame arrester on the engine.

4. The air-to-air fire-blocking intake system according to claim 2, wherein: The intake cross-connecting pipe includes a mounting plate and two intake channels. The mounting plate is a long rectangular plate. The edge of the mounting plate can be connected to the rectangular flange around the intake port of the intake flame arrester. The two intake channels are symmetrically arranged and are L-shaped channels. The intake ports of the two intake channels are respectively arranged at both ends of the mounting plate. The outlet ends of the two intake channels converge into a rectangular outlet.

5. The airspace fire-blocking intake system according to claim 4, characterized in that: Concave inclined surfaces are symmetrically provided on the outer sides of the adjacent long side parts of the two intake channels.

6. The airspace fire-blocking intake system according to claim 4, wherein: A circle of connecting blind holes is provided around the mounting plate. The connecting blind holes are in threaded cooperation with fastening bolts for connecting and fixing the mounting plate to the rectangular flange. Connecting holes cooperating with the fastening bolts are provided around the rectangular flange.

7. The air-to-air fire-blocking intake system according to claim 4, wherein: The size of the intake port of the intake channel is larger than that of its outlet port.

8. The air-to-air flame arrester intake system according to claim 4, characterized in that: The intake ports of the intake channels and the outlet port of the intake flame arrester are all rectangular. Connecting flanges are provided around the intake ports of the intake channels and the outlet port of the intake flame arrester. A circle of connecting blind holes is provided on the outer end surface of the connecting flange of the outlet port of the intake flame arrester.

9. A air-to-air flame arrester intake system according to any one of claims 1-8, characterized in that: The surface roughness of the intake end and outlet end of the intake cross-connecting pipe and the intake end of the intake flame arrester is 3.2.

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