Box type catalytic muffler structure for non-road diesel engine

Abstract

The utility model discloses a box type off -road diesel engine catalytic muffler structure, the structure includes the cylinder, the left end cover of fixed in the left end of cylinder, the right end cover fixed in the right end of cylinder and constitutes the box type cavity, the parallel left baffle and right baffle in the cavity divide the cavity into three parts, and the upper through -hole and lower through -hole are seted up on the left baffle, and the upper through -hole and lower through -hole are seted up on the right baffle, the mixed pipe passes through the lower through -hole of left baffle and the lower through -hole of right baffle and is fixed on the left baffle and right baffle, and the right end of mixed pipe is fixed on the right end cover, and the part of mixed pipe between right baffle and right end cover has the through -hole, the urea nozzle base is fixed in the position of right end cover corresponding with the right end of mixed pipe, the urea nozzle is fixed on the urea nozzle base base, and the urea nozzle is connected with mixed pipe. The utility model discloses box type structure and integrate the urea nozzle on the end cover, simple structure, exhaust back pressure is low, and integrated whole car mounting support and sensor, and the installation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle engine exhaust emission purification technology and energy conservation and consumption reduction technology, and specifically relates to a box-type non-road diesel engine catalytic muffler structure. Background Technology

[0002] The fifth stage emission regulations for non-road diesel engines overseas will be implemented after January 2022. Large-displacement engines have higher requirements for exhaust back pressure limits, which cannot be met by cylindrical catalytic converters. The mainstream box-type catalytic converter integrates the urea nozzle on the intake pipe, which has problems such as complex structure, high cost, and easy urea crystallization. Summary of the Invention

[0003] This utility model provides a box-type non-road diesel engine catalytic muffler structure, which aims to overcome the shortcomings of the prior art. The box-type structure integrates the urea nozzle on the end cap, which is simple in structure, has low exhaust back pressure, and integrates the vehicle mounting bracket and sensor, making it easy to install.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A box-type non-road diesel engine catalytic muffler structure, characterized in that:

[0006] The cylindrical body, the left end cap fixed to the left end of the cylindrical body, and the right end cap fixed to the right end of the cylindrical body constitute a box-shaped cavity;

[0007] The parallel left and right partitions inside the cavity divide the cavity into three parts. The left partition has an upper through hole and a lower through hole, and the right partition has an upper through hole and a lower through hole.

[0008] The mixing tube passes through the lower through hole of the left partition and the lower through hole of the right partition and is fixed to the left partition and the right partition. The right end of the mixing tube is fixed to the right end cap. The part of the mixing tube between the right partition and the right end cap has a through hole.

[0009] The urea nozzle base is fixed on the right end cap at the position corresponding to the right end of the mixing pipe, the urea nozzle is fixed on the urea nozzle base, and the urea nozzle is connected to the mixing pipe.

[0010] The catalyst housing passes through the upper through-hole of the left partition and the upper through-hole of the right partition and is fixed on the left and right partitions. The catalyst unit is encapsulated in the catalyst housing by a gasket. The right end of the catalyst housing is sealed by an end cap.

[0011] The spoiler is welded to the catalytic converter near the air inlet end of the catalytic converter, and the spoiler has several mesh openings.

[0012] The air inlet flange is welded to one side of the cylinder, and an air inlet pipe is connected to the air inlet flange. The air inlet pipe is inserted into the cavity between the right partition and the right end cover inside the cylinder and communicates with the through hole of the mixing pipe.

[0013] The gas outlet flange is welded to the other side of the cylinder, and a gas outlet pipe is connected to the gas outlet flange. The gas outlet pipe is inserted into the interior of the catalytic cylinder.

[0014] The temperature sensor is fixed on the intake pipe, and the nitrogen and oxygen sensor is fixed on the exhaust pipe.

[0015] Furthermore, the inner wall of the cylinder is fitted with heat insulation cotton.

[0016] Furthermore, the through-hole of the mixing tube is connected to outward-expanding swirl fins.

[0017] Furthermore, a sensor module mounting bracket is fixedly installed on the right end cover, and the temperature sensor and nitrogen-oxygen sensor are respectively connected to the sensor module located on the sensor module mounting bracket via signal lines.

[0018] Furthermore, the vehicle connection bracket is fixed to the cylinder with mounting bolts, and shock-absorbing rubber pads are installed between the vehicle connection bracket and the cylinder.

[0019] Furthermore, mounting clamps are also fixed on the cylinder body. Beneficial effects

[0020] 1. The box-type catalytic converter integrates the vehicle mounting bracket and sensors, resulting in low exhaust back pressure and easy installation.

[0021] 2. The mixing tube has several swirl fins, which allow the urea solution to be fully mixed with the exhaust gas after atomization, thus minimizing the risk of crystallization.

[0022] 3. The catalytic unit has two mesh baffles at the front end, which improves the uniformity of the flow field at the front end of the unit and results in high exhaust gas purification efficiency.

[0023] 4. The urea nozzle is integrated into the end cap, resulting in a simple structure. Attached Figure Description

[0024] Figure 1 This is a side view of the appearance of this utility model;

[0025] Figure 2 for Figure 1 Rear view of the exterior;

[0026] Figure 3 for Figure 1 Left-side view of the exterior;

[0027] Figure 4 This is a diagram of the internal structure of this utility model. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown:

[0030] This utility model provides a box-type catalytic muffler structure that integrates a vehicle mounting bracket and sensors, mainly including a catalytic muffler body, mounting clamps, a vehicle mounting bracket, a nitrogen oxide sensor, a temperature sensor, and a urea nozzle.

[0031] The main body of the catalytic muffler consists of a cylinder, two end caps, an inlet and outlet, a baffle, a mixing pipe, a catalytic unit cylinder, a catalytic unit, a gasket, and a baffle.

[0032] The cylinder 1, the left end cap 11 fixed to the left end of the cylinder 1, and the right end cap 12 fixed to the right end of the cylinder 1 form a box-shaped cavity. The inner wall of the cylinder 1 is fitted with heat insulation cotton 15.

[0033] The cavity is divided into three parts by parallel left partition 13 and right partition 14. The left partition 13 has an upper through hole and a lower through hole, and the right partition 14 has an upper through hole and a lower through hole.

[0034] The mixing tube 2 passes through the lower through-holes of the left partition 13 and the right partition 14 and is fixed to the left partition 13 and the right partition 14. The right end of the mixing tube 2 is fixed to the right end cap 12. A certain number of through-holes 21 are distributed in the part of the mixing tube 2 between the right partition 14 and the right end cap 12. The through-holes 21 are connected to swirl fins 22, which are flared outward at a certain angle. The number, direction, and size of the swirl fins 22 on the mixing tube 2 can be adjusted.

[0035] The urea nozzle base 31 is fixed to the right end cap 12 at the position corresponding to the right end of the mixing pipe 2. The urea nozzle 3 is fixed on the urea nozzle base 31 and is connected to the mixing pipe 2.

[0036] The catalyst cylinder 4 passes through the upper through hole of the left partition 13 and the upper through hole of the right partition 14 and is fixed on the left partition 13 and the right partition 14. The catalyst unit 41 is encapsulated in the catalyst cylinder 4 through the gasket 42. The right end of the catalyst cylinder 4 is sealed by the end cap 43.

[0037] Two baffles 5 are welded to the catalytic cylinder 4 near the air inlet end of the catalytic cylinder. The baffles 5 have several mesh holes to ensure that the flow field uniformity of the end face of the catalytic unit 4 meets the standard.

[0038] The relative positions of the mixing tube 2 and the catalytic cylinder 4 can be adjusted.

[0039] An air inlet flange 61 is welded to one side of the cylinder 1. An air inlet pipe 62 is connected to the air inlet flange 61. The air inlet pipe 62 is inserted into the cavity between the right partition 14 and the right end cover 12 inside the cylinder 1 and communicates with the through hole 21 of the mixing pipe 2.

[0040] The gas outlet flange 63 is welded to the other side of the cylinder 1, and the gas outlet flange 63 is connected to the gas outlet pipe 64, which is inserted into the interior of the catalytic cylinder 4.

[0041] A sensor module mounting bracket 7 is fixedly installed on the right end cover 12. The temperature sensor 71 is fixed on the air inlet pipe 62, and the nitrogen oxygen sensor 72 is fixed on the air outlet pipe 64. The temperature sensor 71 and the nitrogen oxygen sensor 72 are respectively connected to the sensor module located on the sensor module mounting bracket 7 by signal lines.

[0042] The vehicle connecting bracket 8 is fixed to the cylinder 1 with mounting bolts 81. A shock-absorbing rubber pad 82 is installed between the vehicle connecting bracket 8 and the cylinder 1. A mounting clamp 83 is also fixed to the cylinder 1. The structure and dimensions of the vehicle connecting bracket 8 and the mounting clamp 83 can be adjusted to fix the cylinder 1.

[0043] In actual use:

[0044] The exhaust gas from the engine enters through the intake pipe 62 and enters the cavity between the right partition 14 and the right end cover 12 inside the cylinder 1. It enters the mixing pipe 2 through the through hole 21. The swirl fins 22 adjust the back pressure and gas flow rate. Urea is injected into the mixing pipe 2 from the urea nozzle 3 and mixes with the exhaust gas. After exiting from the left end of the mixing pipe 2, it passes through the baffle 5 and enters the catalytic unit cylinder 4 from the left end. After being catalyzed by the catalytic unit 41, it is discharged from the exhaust pipe 64.

[0045] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A box-type non-road diesel engine catalytic muffler structure, characterized in that: The cylindrical body, the left end cap fixed to the left end of the cylindrical body, and the right end cap fixed to the right end of the cylindrical body constitute a box-shaped cavity; The parallel left and right partitions inside the cavity divide the cavity into three parts. The left partition has an upper through hole and a lower through hole, and the right partition has an upper through hole and a lower through hole. The mixing tube passes through the lower through hole of the left partition and the lower through hole of the right partition and is fixed to the left partition and the right partition. The right end of the mixing tube is fixed to the right end cap. The part of the mixing tube between the right partition and the right end cap has a through hole. The urea nozzle base is fixed on the right end cap at the position corresponding to the right end of the mixing pipe. The urea nozzle is fixed on the urea nozzle base and is connected to the mixing pipe. The catalyst housing passes through the upper through-hole of the left partition and the upper through-hole of the right partition and is fixed on the left and right partitions. The catalyst unit is encapsulated in the catalyst housing by a gasket. The right end of the catalyst housing is sealed by an end cap. The spoiler is welded to the catalytic converter near the air inlet end of the catalytic converter, and the spoiler has several mesh openings. The air inlet flange is welded to one side of the cylinder, and an air inlet pipe is connected to the air inlet flange. The air inlet pipe is inserted into the cavity between the right partition and the right end cover inside the cylinder and communicates with the through hole of the mixing pipe. The gas outlet flange is welded to the other side of the cylinder, and a gas outlet pipe is connected to the gas outlet flange. The gas outlet pipe is inserted into the interior of the catalytic cylinder. The temperature sensor is fixed on the intake pipe, and the nitrogen and oxygen sensor is fixed on the exhaust pipe.

2. The box-type non-road diesel engine catalytic muffler structure as described in claim 1, characterized in that: The inner wall of the cylinder is lined with heat insulation cotton.

3. The box-type non-road diesel engine catalytic muffler structure as described in claim 1, characterized in that: The mixing tube has through holes connected to outward-expanding swirl fins.

4. The box-type non-road diesel engine catalytic muffler structure as described in claim 1, characterized in that: The sensor module mounting bracket is fixedly installed on the right end cover. The temperature sensor and nitrogen-oxygen sensor are respectively connected to the sensor module located on the sensor module mounting bracket by signal lines.

5. The box-type non-road diesel engine catalytic muffler structure as described in claim 1, characterized in that: The vehicle connection bracket is fixed to the cylinder with mounting bolts, and shock-absorbing rubber pads are installed between the vehicle connection bracket and the cylinder.

6. The structure of a box-type non-road diesel engine catalytic muffler as described in claim 1, characterized in that: The cylinder is also fixed with mounting clamps.

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