Heating device of low-oxygen regeneration system for motor vehicle tail gas treatment

Abstract

The invention discloses a heating device of a motor vehicle exhaust treatment low-oxygen regeneration system, which comprises a double-layer cylinder, a uniform mixing structure, a combustion chamber and an air supply pipe are arranged in the double-layer cylinder, and the combustion chamber is sequentially connected with an ignition chamber and a first air supply chamber. Through the arrangement of the first gas supplementing cavity, the ignition cavity, the gas supplementing pipe, the combustion cavity and the spiral spring structure, the problem that ignition cannot be smoothly conducted when tail gas is actively regenerated in the high-altitude low-oxygen-content environment such as the plateau is solved, through the uniform mixing structure and the double-layer cylinder structure, the flow speed and temperature are more uniform during regeneration, and the regeneration efficiency is improved. The heat loss is reduced, the external temperature of the product is reduced, and the use safety is improved while the regeneration efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of design and manufacturing of motor vehicle exhaust treatment equipment, and in particular to a heating and temperature raising device for a low oxygen regeneration system of motor vehicle exhaust treatment. Background Art

[0002] In the existing locomotive exhaust after-treatment system, the active regeneration process is affected by many factors, and the most important of these factors is the oxygen content in the exhaust gas. When the system is regenerated, if the oxygen content is too low and does not reach the required value for regeneration, the direct consequence may be that the carbon rod ignition cannot be ignited, and thus regeneration cannot be carried out. Especially in certain environments, such as high-altitude and low-oxygen areas such as plateaus, the exhaust gas oxygen content is about 16% as the boundary. When it is lower than this value, it will cause difficulty in ignition or even failure to ignite during regeneration. Summary of the invention

[0003] The purpose of the present invention is to provide a heating and temperature-raising device for a low-oxygen regeneration system for exhaust gas treatment of motor vehicles, so as to solve the technical problem in the prior art that carbon rods cannot be ignited under low-oxygen conditions, resulting in failure to regenerate. A heating and temperature-raising device for exhaust gas treatment of locomotives with a compact structure and simple processing, manufacturing and assembly is provided, which mainly meets the requirements of high-altitude low-oxygen content environments such as plateaus, so that the product can be ignited smoothly and heated quickly during active regeneration, thereby improving the system regeneration success rate and rate.

[0004] To achieve the above object, the present invention provides the following technical solutions: The present invention provides a heating and temperature-raising device for a low-oxygen regeneration system for exhaust gas treatment of a motor vehicle, comprising a double-layer cylinder, in which a uniform mixing structure, a combustion chamber, and an air supply pipe are arranged, and the combustion chamber is sequentially connected to an ignition chamber and a first air supply chamber.

[0005] Furthermore, the double-layer cylinder is provided with an air inlet pipe, an inner cylinder, an outer cylinder, an end cover, an inner end cover, and a partition. The uniform mixing structure is arranged in the inner cylinder, and the uniform mixing structure includes a plurality of uniform mixing plates. The double-layer cylinder is mainly used for heat preservation and heat insulation. The uniform mixing structure is mainly used for uniformly mixing the combustion gas, so that it is fully mixed, and the flow rate and temperature are as uniform as possible at the regeneration point. The end cover serves as the first-level connection point of the combustion chamber cylinder, and plays a major role in the installation and fastening of the combustion chamber cylinder; the inner end cover limits the combustion chamber cylinder (or may not limit it), and together with the combustion chamber cylinder, the end cover and the outer cylinder, forms an end face insulation cavity. The partition fastens the combustion chamber cylinder again, and simultaneously forms a buffer cavity for the exhaust gas to enter the burner with the inner cylinder and the inner end cover. After the exhaust gas enters the cavity, it is evenly distributed through the partition and participates in the initial combustion.

[0006] The engine exhaust gas enters the burner through the intake pipe and is initially evenly distributed through the partition before participating in the combustion reaction, so that the exhaust gas can be initially burned as evenly as possible, while also stabilizing the combustion chamber cylinder.

[0007] The engine exhaust gas can enter the burner through the intake pipe; the intake pipe installation section located between the outer cylinder and the inner cylinder is arranged with air holes, and part of the exhaust gas can enter the gap space between the inner cylinder and the outer cylinder through the air holes.

[0008] Furthermore, the uniform mixing plate includes a first uniform mixing plate, a second uniform mixing plate, a third uniform mixing plate, and a fourth uniform mixing plate.

[0009] Furthermore, the first air supply cavity is composed of a first end plate and a second end plate, and an opening on the first end plate is provided with a fuel injector assembly, and an air supply nozzle is provided on the cavity wall formed between the first end plate and the second end plate to introduce combustion air so as to increase the oxygen content in the combustion cavity; a circle of evenly distributed openings is arranged on the second end plate to prevent the supplemented gas from directly blowing the ignition rod and affecting the ignition success rate.

[0010] Furthermore, a circle of evenly distributed openings is arranged on the second end plate to prevent the supplemented gas from directly blowing the ignition rod and affecting the ignition success rate.

[0011] Furthermore, the front center of the ignition cavity is a fuel injection nozzle assembly, and the center of the ignition cavity is surrounded by openings of the second end plate of the first air supply cavity. The process of fuel injection and first-stage air supply is completed at the front inlet of the ignition cavity, and an ignition rod is arranged in the middle of the cavity. As the temperature of the ignition rod continues to rise, the injected fuel begins to burn when the ignition temperature is reached, thereby completing ignition.

[0012] Furthermore, the combustion chamber is composed of a combustion chamber cylinder and a coil spring, and the coil spring is wound on the inner wall of the combustion chamber cylinder. The combustion cylinder is equipped with a coil spring, mainly to make the mixed combustion gas flow in a rotating path during circulation, so as to fully mix the air flowing in from the air supply pipe and the mixed combustion gas flowing in from the ignition chamber, so as to make the combustion more complete and avoid oil smoke leakage.

[0013] Furthermore, the air supply pipe is arranged in the combustion chamber cylinder, and the air supply pipe is a straight pipe plus an arc-shaped curved pipe structure. The straight pipe part is installed in the combustion chamber cylinder by welding, and the arc-shaped part is along the arc line of the inner wall of the combustion chamber. When the mixed combustion gas in the ignition chamber flows backward, air is continuously supplemented (and the oxygen content is increased) to facilitate its continuous and full combustion, reduce or even completely avoid oil smoke leakage caused by incomplete combustion. The arc-shaped part allows the supplemented gas to rotate and circulate along the arc line, so as to fully mix the mixed combustion gas and make the combustion complete.

[0014] Furthermore, the air supply pipe is also provided with an air supply nozzle seat outside the combustion chamber cylinder.

[0015] Based on the above technical solution, the embodiments of the present invention can at least produce the following technical effects: The present invention solves the problem that the exhaust gas cannot be smoothly ignited due to low oxygen content during active regeneration in high-altitude and low-oxygen environments such as plateaus by arranging a first air supply chamber, an ignition chamber, an air supply pipe, a combustion chamber, and a coil spring structure. In addition, through a uniform mixing structure and a double-layer cylinder structure, the flow rate and temperature during regeneration are more uniform, and heat loss is reduced, the external temperature of the product is lowered, and the regeneration efficiency is improved while the safety of use is increased.

[0016] The locomotive after-treatment regeneration system can be used smoothly when the oxygen content of the engine exhaust is too low, which greatly improves the environmental factor restrictions on the installation and use of the locomotive after-treatment system, thereby achieving the purpose of exhaust gas purification and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 is a right side view of an embodiment of the present invention; Figure 3 is a left side view of an embodiment of the present invention; In the figure: 1-first air supply chamber; 2-ignition chamber; 3-combustion chamber cylinder; 4-air supply pipe; 5-helical spring; 6-air supply nozzle seat; 7-end cover; 8-inner end cover; 9-partition plate; 10-inner cylinder; 11-first uniform mixing plate; 12-second uniform mixing plate; 13-third uniform mixing plate; 14-fourth uniform mixing plate; 15-intake pipe; 16-outer cylinder. DETAILED DESCRIPTION

[0019] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0020] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] Example 1 like Figure 1-3 As shown, the present invention provides a heating and temperature-raising device for a low-oxygen regeneration system for exhaust gas treatment of a motor vehicle, comprising a double-layer cylinder, in which a uniform mixing structure, a combustion chamber, and an air supply pipe 4 are arranged, and the combustion chamber is sequentially connected to an ignition chamber 2 and a first air supply chamber 1.

[0022] In this embodiment, the double-layer cylinder is provided with an air inlet pipe 15, an inner cylinder 10, an outer cylinder 16, an end cover 7, an inner end cover 8, and a partition 9. The uniform mixing structure is arranged in the inner cylinder 10, and the uniform mixing structure includes a plurality of uniform mixing plates.

[0023] In this embodiment, the uniform mixing plate includes a first uniform mixing plate 11 , a second uniform mixing plate 12 , a third uniform mixing plate 13 , and a fourth uniform mixing plate 14 .

[0024] In this embodiment, the first air supplement cavity 1 is composed of a first end plate and a second end plate. A fuel injection nozzle assembly is provided in an opening on the first end plate, and an air supplement nozzle is provided on the cavity wall formed between the first end plate and the second end plate.

[0025] In this embodiment, a circle of evenly distributed openings is arranged on the second end plate.

[0026] In this embodiment, the front end center of the ignition chamber 2 is a fuel injection nozzle assembly, and the center of the ignition chamber 2 is surrounded by openings of the second end plate of the first air supply chamber 1.

[0027] In this embodiment, the combustion chamber is composed of a combustion chamber cylinder 3 and a coil spring 5 , and the coil spring 5 is wound around the inner wall of the combustion chamber cylinder 3 .

[0028] In this embodiment, the air supply pipe 4 is arranged in the combustion chamber cylinder 3. The air supply pipe 4 is a straight pipe plus an arc-shaped bend pipe structure. The straight pipe part is installed in the combustion chamber cylinder 3 by welding, and the arc-shaped part is along the arc line of the inner wall of the combustion chamber.

[0029] In this embodiment, the air supply pipe 4 is further provided with an air supply nozzle seat 6 outside the combustion chamber cylinder 3 .

[0030] The structures, functions and connection forms disclosed in this article can be implemented in other ways. For example, the embodiments described above are only exemplary, for example, multiple components can be combined or integrated into another component; in addition, each functional component in each embodiment of this article can be integrated into one functional component, or each functional component can exist physically separately, or two or more functional components can be integrated into one functional component.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A heating and temperature raising device for a low oxygen regeneration system for exhaust gas treatment of a motor vehicle, characterized in that: It comprises a double-layer cylinder, in which a uniform mixing structure, a combustion chamber, and an air supply pipe (4) are arranged, and the combustion chamber is sequentially connected to an ignition chamber (2) and a first air supply chamber (1).

2. The heating and temperature raising device for the low oxygen regeneration system of vehicle exhaust treatment according to claim 1 is characterized in that: The double-layer cylinder is provided with an air inlet pipe (15), an inner cylinder (10), an outer cylinder (16), an end cover (7), an inner end cover (8), and a partition (9); the uniform mixing structure is arranged in the inner cylinder (10); the uniform mixing structure comprises a plurality of uniform mixing plates.

3. The heating and temperature raising device for the low oxygen regeneration system of vehicle exhaust treatment according to claim 1 is characterized in that: The first air supplement cavity (1) is composed of a first end plate and a second end plate, a fuel injection nozzle assembly is arranged in an opening on the first end plate, and an air supplement nozzle is arranged on a cavity wall formed between the first end plate and the second end plate.

4. The heating and temperature raising device for the low oxygen regeneration system of vehicle exhaust treatment according to claim 3 is characterized in that: The second end plate is provided with a circle of evenly distributed openings.

5. The heating and temperature raising device for the low oxygen regeneration system of vehicle exhaust treatment according to claim 1, characterized in that: The front end center of the ignition chamber (2) is a fuel injection nozzle assembly, and the center of the ignition chamber (2) is surrounded by openings of the second end plate of the first air supply chamber (1).

6. The heating and temperature raising device for the low oxygen regeneration system of vehicle exhaust treatment according to claim 1, characterized in that: The combustion chamber is composed of a combustion chamber cylinder (3) and a coil spring (5), and the coil spring (5) is wound around the inner wall of the combustion chamber cylinder (3).

7. The heating and temperature raising device for the low oxygen regeneration system of vehicle exhaust treatment according to claim 1, characterized in that: The air supply pipe (4) is arranged in the combustion chamber cylinder (3), and the air supply pipe (4) is a straight pipe plus an arc-shaped curved pipe structure, the straight pipe portion is installed in the combustion chamber cylinder (3) by welding, and the arc-shaped portion is along the arc line of the inner wall of the combustion chamber.

8. The heating and temperature raising device for the low oxygen regeneration system for exhaust gas treatment of motor vehicles according to claim 7, characterized in that: The air supply pipe (4) is also provided with an air supply nozzle seat (6) outside the combustion chamber cylinder (3).

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