Diesel exhaust smoke sampling system

Abstract

The application discloses a diesel engine exhaust smoke sampling system, which comprises a smoke meter, an electromagnetic valve, a bench exhaust pipe, a cylinder and a sampling mechanism. The electromagnetic valve is electrically connected with the smoke meter. One end of the bench exhaust pipe is fixedly connected with an exhaust pipe of the diesel engine in a vertical mode, the bench exhaust pipe has an elbow, and the elbow is provided with a sampling hole. One end of the cylinder is fixedly connected with the elbow of the bench exhaust pipe, and the electromagnetic valve is connected with the cylinder through a first air pipe. The sampling mechanism is fixed to the elbow of the bench exhaust pipe and connected with the sampling hole, a piston rod of the cylinder is connected with the sampling mechanism through a connecting block, and the sampling mechanism is used for sampling smoke at the elbow. The smoke meter is connected with the sampling mechanism through a second air pipe, and the smoke meter is used for analyzing smoke degree values of the smoke sampled by the sampling mechanism. Therefore, the diesel engine exhaust smoke sampling system can automatically sample smoke, is accurate in sampling, improves work efficiency and eliminates safety hazards.

Description

TECHNICAL FIELD

[0001] The present application relates to the diesel engine technical field, and particularly relates to a diesel engine exhaust smoke sampling system. BACKGROUND

[0002] In the existing diesel engine bench test, the diesel engine exhaust smoke needs to be measured. At present, when the diesel engine is tested, a worker needs to enter the bench to sample the smoke at high speed of the diesel engine, which is low in work efficiency and has safety hazards.

[0003] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present application and therefore it should not be taken as admitting that such information forms the general knowledge of those of ordinary skill in the art. SUMMARY

[0004] The diesel engine exhaust smoke sampling system can automatically sample the smoke, is accurate in sampling, improves work efficiency and eliminates safety hazards.

[0005] To achieve the above object, the present application provides a diesel engine exhaust smoke sampling system, which comprises a smoke meter, an electromagnetic valve, a bench exhaust pipe, a cylinder and a sampling mechanism. The electromagnetic valve is electrically connected with the smoke meter. One end of the bench exhaust pipe is fixedly connected with an exhaust pipe of the diesel engine vertically, and the bench exhaust pipe has an elbow, and the elbow has a sampling hole. One end of the cylinder is fixedly connected with the elbow of the bench exhaust pipe, and the electromagnetic valve is connected with the cylinder through a first air pipe. The sampling mechanism is fixed to the elbow of the bench exhaust pipe and connected with the sampling hole, and a piston rod of the cylinder is connected with the sampling mechanism through a connecting block. The sampling mechanism is used to sample the smoke at the elbow. The piston rod can drive the sampling mechanism to move transversely. The smoke meter is connected with the sampling mechanism through a second air pipe, and the smoke meter is used to analyze the smoke degree value of the smoke sampled by the sampling mechanism and output data.

[0006] In an embodiment of the present application, the diesel engine exhaust smoke sampling system further comprises a control room, and the smoke meter and the electromagnetic valve are arranged in the control room.

[0007] In an embodiment of the present application, the electromagnetic valve is a two-position four-way electromagnetic valve.

[0008] In an embodiment of the present application, the second air pipe is a hose.

[0009] In an embodiment of the present application, the sampling mechanism comprises a sampling pipe and a sampling probe. One end of the sampling pipe is connected with the second air pipe, and the sampling probe is fixed to the other end of the sampling pipe.

[0010] In an embodiment of the present application, the piston rod of the air cylinder is fixedly connected with the one end of the sampling tube through the connecting block, and the piston rod can drive the sampling tube to move transversely, so that the sampling probe can extend into the sampling hole to sample the smoke at the elbow.

[0011] In an embodiment of the present application, one end of the air cylinder is fixedly connected with the elbow of the rack exhaust pipe through the connecting plate.

[0012] In an embodiment of the present application, the part of the rack exhaust pipe connected with the exhaust pipe of the diesel engine oil has a cooling pipe.

[0013] In an embodiment of the present application, the sampling tube has a cooling fin.

[0014] In an embodiment of the present application, the one end of the rack exhaust pipe is provided with a spring pipe, and the other end of the rack exhaust pipe is provided with a universal joint.

[0015] Compared with the prior art, the diesel engine exhaust smoke sampling system according to the present application can automatically sample the smoke, is accurate in sampling, improves work efficiency, eliminates safety hazards, and can protect the air pipe and the rubber sealing element in the smoke meter from being scalded to cause failure, and can be adapted to various models of diesel engines for installation and use. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the diesel engine exhaust smoke sampling system according to an embodiment of the present application.

[0017] MAIN REFERENCE NUMERALS EXPLANATION:

[0018] 1 - smoke meter, 2 - control chamber, 3 - first air pipe, 4 - second air pipe, 5 - connecting block, 6 - sampling tube, 7 - cooling fin, 8 - sampling hole, 9 - sampling hole cover, 10 - sampling probe, 11 - universal joint, 12 - connecting plate, 13 - air cylinder, 14 - rack exhaust pipe, 15 - spring pipe, 16 - cooling pipe, 17 - joint, 18 - exhaust pipe, 19 - diesel engine, 20 - control circuit, 21 - electromagnetic valve. DETAILED DESCRIPTION

[0019] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present application is not limited by the specific embodiments.

[0020] Unless otherwise explicitly indicated, throughout the specification and claims, the term "comprise" or its variants such as "comprises" or "comprising" will be understood to encompass the stated element or components, but not to exclude the presence of other elements or components.

[0021] Figure 1 This is a schematic diagram of a diesel engine exhaust smoke sampling system according to an embodiment of the present invention. Figure 1 As shown, a diesel engine exhaust smoke sampling system according to a preferred embodiment of the present invention includes: a smoke meter 1, a solenoid valve 21, a bench exhaust pipe 14, a cylinder 13, and a sampling mechanism. The solenoid valve 21 is electrically connected to the smoke meter 1. One end of the bench exhaust pipe 14 is vertically and fixedly connected to the exhaust pipe 18 of the diesel engine 19, and the bench exhaust pipe 14 has a bend with a sampling hole 8 at the bend. One end of the cylinder 13 is fixedly connected to the bend of the bench exhaust pipe 14, and the solenoid valve 21 is connected to the cylinder 13 via a first air pipe 3. The sampling mechanism is fixed to the bend of the bench exhaust pipe 14 and connected to the sampling hole 8. The piston rod of the cylinder 13 is connected to the sampling mechanism via a connecting block 5, and the sampling mechanism is used to sample the smoke at the bend. The piston rod can drive the sampling mechanism to move laterally. The smoke meter 1 is connected to the sampling mechanism via the second air tube 4, and the smoke meter 1 is used to analyze the smoke opacity value of the smoke sampled by the sampling mechanism and output the data.

[0022] In one embodiment of the present invention, the diesel engine exhaust smoke sampling system further includes a control chamber 2, in which the smoke meter 1 and the solenoid valve 21 are disposed. The solenoid valve 21 is a two-position four-way solenoid valve 21. The second air pipe 4 is a flexible hose.

[0023] In one embodiment of the present invention, the sampling mechanism includes a sampling tube 6 and a sampling probe 10. One end of the sampling tube 6 is connected to the second trachea 4, and the sampling probe 10 is fixed to the other end of the sampling tube 6.

[0024] In one embodiment of the present invention, the piston rod of the cylinder 13 is fixedly connected to one end of the sampling tube 6 via the connecting block 5, and the piston rod can drive the sampling tube 6 to move laterally, so that the sampling probe 10 can extend into the sampling hole 8 to sample the smoke at the bend.

[0025] In one embodiment of the invention, one end of the cylinder 13 is fixedly connected to the elbow of the bench exhaust pipe 14 via a connecting plate 12. The portion of the bench exhaust pipe 14 that connects to the exhaust pipe 18 of the diesel engine oil has a cooling pipe 16. The sampling tube 6 has heat sinks 7.

[0026] In one embodiment of the present invention, a spring tube 15 is provided on one end of the pedestal exhaust pipe 14, and a universal joint 11 is provided on the other end of the pedestal exhaust pipe 14.

[0027] In practical application, the diesel engine exhaust smoke sampling system of the present application comprises a smoke meter 1, a control room 2, a first air pipe 3, a second air pipe 4 (hose), a connecting block 5, a sampling pipe 6, a cooling fin 7, a sampling hole 8, a sampling hole cover 9, a sampling probe 10, a universal joint 11, a connecting plate 12, a cylinder 13, a bench exhaust pipe 14, a spring pipe 15, a cooling pipe 16, a joint 17, an exhaust pipe 18, a diesel engine 19, a control circuit 20 and a two-position four-way electromagnetic valve 21. Specifically, the sampling hole 8, the sampling hole cover 9 and the connecting plate 12 are installed at the elbow of the horizontal section of the bench exhaust pipe 14, when smoke sampling is needed, the sampling control button on the smoke meter 1 in the control room 2 is pressed, the two-position four-way electromagnetic valve 21 is powered to reverse, the first air pipe 3 supplies air to the cylinder 13 to drive the sampling pipe 6 (the sampling probe 10 is installed at the end of the sampling pipe 6) to be inserted into the bench exhaust pipe 18 (the sampling pipe 6 and the piston rod of the cylinder 13 are connected together through the connecting block 5), then the smoke meter 1 will automatically suck a pipe of smoke to analyze the smoke value and output data. After completion, the two-position four-way electromagnetic valve 21 will automatically reset, the cylinder 13 works to drive the sampling probe 10 of the sampling pipe 6 to be pulled out, the whole working process is safe, reliable, accurate and fast. Since the bench exhaust pipe 14 is installed with the universal joint 11 and the spring pipe 15, it can be randomly swung within a certain range to facilitate the matching of various models of diesel engines 19. The cooling pipe 16 on the bench exhaust pipe 14 and the cooling fin 7 on the sampling pipe 6 (copper pipe) can effectively reduce the exhaust temperature, which can protect the second air pipe 4 (hose) after the sampling pipe 6 and the rubber sealing element in the smoke meter 1 from being scalded.

[0028] In summary, the diesel engine exhaust smoke sampling system of the present application has the following beneficial effects:

[0029] 1. Smoke sampling can be automatically performed in the control room (without the need to enter the bench to operate);

[0030] 2. The bench exhaust pipe is installed with a cooling pipe to preliminarily cool the temperature of the diesel engine exhaust to protect the second air pipe (hose) after the sampling probe and the rubber sealing element in the smoke meter from being scalded;

[0031] 3. The cooling fin on the sampling pipe can further cool the exhaust temperature to better protect the second air pipe (hose) after the sampling pipe 6 and the rubber sealing element in the smoke meter from being scalded and resulting in failure;

[0032] 4. The universal joint and the spring pipe perpendicular to the ground on the bench exhaust pipe can be randomly swung within a certain range to facilitate the matching of various models of diesel engines for installation and use;

[0033] 5. The sampling pipe and the piston rod of the cylinder are connected together through the connecting block, the cylinder is driven by the two-position four-way reversing valve to accurately and quickly extend and retract;

[0034] 6. The sampling mechanism is installed on the horizontal section of the flue, because the smoke sample in the flue is relatively flat in flow rate, and the sampling is accurate;

[0035] 7. The working efficiency is improved, and the safety hazard is eliminated.

[0036] The foregoing description of specific exemplary embodiments of the application is intended to be illustrative only and is not intended to limit the application to the precise forms described. Many modifications and variations are possible in light of the above teachings without departing from the spirit or essential characteristics of the application. The exemplary embodiments were chosen and described in order to explain the principles of the application and its practical application and to allow others skilled in the art to understand the application for various exemplary embodiments with various modifications being applicable. The scope of the application is intended to be defined by the claims and their equivalents.

Claims

1. A diesel engine exhaust smoke sampling system, characterized in that, include: Smoke meter; The solenoid valve is electrically connected to the smoke meter; A test bench exhaust pipe, one end of which is vertically and fixedly connected to the exhaust pipe of a diesel engine, and the test bench exhaust pipe has an elbow with a sampling hole at the elbow. A cylinder, one end of which is fixedly connected to the bend of the exhaust pipe of the test bench, and the solenoid valve is connected to the cylinder through a first air pipe; and The sampling mechanism is fixed at the bend of the exhaust pipe of the platform and connected to the sampling hole. The piston rod of the cylinder is connected to the sampling mechanism through a connecting block, and the sampling mechanism is used to sample the smoke at the bend. The piston rod can drive the sampling mechanism to move laterally; The smoke meter is connected to the sampling mechanism via a second air tube, and the smoke meter is used to analyze the smoke opacity value of the smoke sampled by the sampling mechanism and output the data. The sampling mechanism includes a sampling tube and a sampling probe. One end of the sampling tube is connected to the second trachea, and the sampling probe is fixed to the other end of the sampling tube. The piston rod of the cylinder is fixedly connected to one end of the sampling tube via the connecting block, and the piston rod can drive the sampling tube to move laterally, so that the sampling probe can be inserted into the sampling hole to sample the smoke at the bend. The sampling mechanism is installed on the horizontal section of the bend in the exhaust pipe of the test bench.

2. The diesel engine exhaust smoke sampling system as described in claim 1, characterized in that, It also includes a control room, in which the smoke meter and the solenoid valve are located.

3. The diesel engine exhaust smoke sampling system as described in claim 1, characterized in that, The solenoid valve is a two-position four-way solenoid valve.

4. The diesel engine exhaust smoke sampling system as described in claim 1, characterized in that, The second trachea is a flexible tube.

5. The diesel engine exhaust smoke sampling system as described in claim 1, characterized in that, One end of the cylinder is fixedly connected to the elbow of the exhaust pipe of the frame via a connecting plate.

6. The diesel engine exhaust smoke sampling system as described in claim 1, characterized in that, The portion of the exhaust pipe of the test bench that connects to the exhaust pipe of the diesel engine oil has a cooling pipe.

7. The diesel engine exhaust smoke sampling system as described in claim 6, characterized in that, The sampling tube has heat sinks.

8. The diesel engine exhaust smoke sampling system as described in claim 1, characterized in that, A spring tube is provided at one end of the exhaust pipe of the test bench, and a universal joint is provided at the other end of the exhaust pipe of the test bench.

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