Tail gas sampling device for heavy-duty diesel truck

Abstract

The utility model discloses a heavy-duty diesel truck tail gas sampling device, and particularly relates to the field of diesel truck tail gas sampling, the heavy-duty diesel truck tail gas sampling device comprises a first connecting pipe, one end of the first connecting pipe is fixedly connected with a connecting hopper, the other end of the first connecting pipe is fixedly connected with a first limiting disc, and one end, close to the first limiting disc, of the first connecting pipe is sleeved with a connecting cover. According to the tail gas collecting device, firstly, the first connecting pipe is tightly connected with the automobile tail gas exhaust pipe conveniently through the arranged connecting fastening mechanism, the tail gas collecting device is matched with the tail gas exhaust pipes with different diameters for installation and use, and when tail gas needs to be collected through the cooperation of the arranged communicating pipe and the arranged collecting pipe, the tail gas can be collected conveniently. The first valve and the second valve are opened, the pull ring is pulled to suck the tail gas into the collecting pipe, the second valve and the first valve are closed, tail gas collection is completed, tail gas exhausted by an automobile in different states can be collected according to needs, the tail gas collection accuracy is improved, and the practicability is high. And a new collecting pipe can be conveniently replaced for connection and use.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust gas sampling of diesel trucks, and more specifically, to an exhaust gas sampling device for heavy-duty diesel trucks. Background Art

[0002] Freight vehicles are generally called trucks, also known as trucks, which are vehicles mainly used to transport goods. Heavy-duty diesel vehicles refer to diesel vehicles with a maximum gross mass of more than 3.5 tons. As the problems caused by vehicle exhaust are becoming more and more serious, we need to use exhaust gas sampling devices to sample and test vehicle exhaust to prevent some vehicles from exceeding the exhaust gas standard.

[0003] The current sampling devices for motor vehicle exhaust are easily mixed with external air when collecting, resulting in deviations between the collected exhaust data and the actual data during testing, resulting in unsatisfactory exhaust gas detection results.

[0004] The utility model of Chinese patent application number CN202123315227.X discloses a motor vehicle exhaust sampling device, including a sampling probe and a collecting container, one end of the sampling probe is connected to the collecting container, and a collecting component is installed in the middle of the collecting container, and the collecting component includes a connecting pipe, a collecting inner pipe, a sealing hole and an exhaust hole. The connecting pipe and the collecting inner pipe are an integrated structure, and the output end of the sampling probe is clamped inside the connecting pipe. The sampling probe transports the sampled exhaust gas to the inside of the collecting inner pipe. The utility model allows the exhaust gas to enter the inside of the collecting inner pipe through the sampling probe, and the excess exhaust gas is discharged from the sealing hole, enters the interior of the collecting container, and is finally discharged to the outside from the exhaust hole. The collecting inner pipe does not directly contact the external air. After the collection is completed, the sealing hole and the connecting pipe are all excess exhaust gas, and it is not easy for air to mix in when the collection is completed, thereby ensuring the purity of the collected exhaust gas and making the subsequent detection results more accurate. In this structure, the connecting pipe, the collecting pipe and the exhaust pipe are directly connected, and the exhaust gas discharged by the car is directly input into the connecting pipe and into the middle of the collecting pipe for collection. Since the exhaust gas is always discharged after the car is started, it is inconvenient to disassemble, replace and install a new collecting pipe for connection and use at any time. It is inconvenient to collect and collect the exhaust gas discharged by the car in different states as needed, which affects the use effect. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an exhaust gas sampling device for a heavy-duty diesel truck to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a heavy-duty diesel truck exhaust sampling device, comprising a first connecting pipe, one end of the first connecting pipe being fixedly connected to a connecting bucket, the other end being fixedly connected to a first limiting plate, an end of the first connecting pipe close to the first limiting plate being sleeved with a connecting cover, a top of the first connecting pipe being fixedly connected to a connecting pipe, and a first valve being provided in the middle of the connecting pipe;

[0007] A connection fastening mechanism is provided at one end of the first connecting pipe close to the connecting bucket, a display meter is connected to the top of the first connecting pipe, and a temperature detection head and a flow rate detection head are provided at a position corresponding to the display meter in the middle of the first connecting pipe;

[0008] One end of the connecting pipe is connected to a collecting pipe, and the other end is provided with an insert rod. One end of the collecting pipe is fixedly connected to a second connecting pipe, a second valve is provided in the middle of the second connecting pipe, and both ends of the insert rod are fixedly connected to a piston and a pull ring respectively, and a sealing gasket is provided on one side of the piston.

[0009] Preferably, the diameter of the end of the connecting bucket away from the first connecting pipe is close to the diameter of the end of the first connecting pipe, a sealing gasket is provided in the middle of the connecting bucket, and the end of the first connecting pipe close to the first limiting plate is set as a right-angle structure.

[0010] Preferably, one end of the connecting pipe is provided with a thread, the one end of the connecting pipe extends into the interior of the second connecting pipe and is threadedly connected to the inner cavity of the second connecting pipe, and the middle fixing sleeve of the connecting pipe is provided with a first limiting ring.

[0011] Preferably, the piston is arranged in the middle of the collecting tube, the wall of the sealing gasket is tightly fitted with the inner wall of the collecting tube, the pull ring is arranged on the side of the collecting tube away from the second connecting tube, and a second limiting ring is fixed on one end of the first connecting tube close to the connecting bucket.

[0012] Preferably, the connection and fastening mechanism includes a connection ring sleeved on one end of the first connection pipe close to the connection bucket, the top of the connection ring is fixedly connected to a fixing plate, and a connection frame is provided on one side of the connection bucket.

[0013] Preferably, a connecting plate is fixedly connected to the top of the connecting frame, a first threaded rod is inserted in the middle of the fixed plate, one end of the first threaded rod is rotatably connected to the connecting plate, one end of the first threaded rod is fixedly connected to a second limit plate, and a nut is sleeved in the middle of the first threaded rod.

[0014] Preferably, the cross-sectional shape of the connecting frame is set to be "U"-shaped, a second threaded rod is inserted into the middle of the nut, one end of the second threaded rod is fixedly connected to a rotating disk, the threads at both ends of the second threaded rod are symmetrical, and movable sliders are symmetrically sleeved at both ends of the second threaded rod, and the bottom of the movable slider is fixedly connected to a splint.

[0015] Technical effects and advantages of this utility model:

[0016] The utility model firstly facilitates the tight connection of the first connecting pipe with the exhaust pipe of the automobile through the provided connection and fastening mechanism, and is adapted to exhaust pipes of different diameters for installation and use. Furthermore, through the cooperation of the provided connecting pipe and the collecting pipe, when exhaust gas needs to be collected, the first valve and the second valve are opened and the pull ring is pulled to draw the exhaust gas into the interior of the collecting pipe, and the second valve and the first valve are closed to complete the collection of the exhaust gas. Furthermore, the exhaust gas discharged from the automobile in different states can be collected as needed, thereby improving the accuracy of exhaust gas collection, and is convenient to disassemble and install and replace with a new collecting pipe for connection and use.

[0017] The utility model also allows the exhaust gas input into the first connecting pipe to be directly input into the purification box for exhaust purification through the connection cover provided, and does not affect the continuous discharge of the exhaust gas during exhaust gas collection. At the same time, the temperature and flow rate of the exhaust gas can be monitored in real time through the temperature detection head and the flow rate detection head, and real-time observation can be performed through the display table, thereby improving the detection effect. The sealing strength of the connection between the interior of the connecting bucket and the exhaust gas discharge pipe is improved by the sealing gasket, thereby preventing the exhaust gas in the middle of the first connecting pipe from being mixed with external gas, thereby improving the effect of exhaust gas collection.

[0018] In summary, through the mutual influence of the above-mentioned multiple effects, exhaust gas can be collected at any time without affecting the continuous discharge of exhaust gas. At the same time, exhaust gas discharged from the car in different states can be collected as needed, thereby improving the accuracy of exhaust gas collection, and facilitating the disassembly, installation and replacement of new collection pipes for connection and collection use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the first connecting pipe of the utility model.

[0022] Figure 4 It is a structural diagram of the connection and fastening mechanism of the utility model.

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the collecting tube of the present invention.

[0024] The accompanying drawings are marked as follows: 1. first connecting pipe; 2. connecting bucket; 3. first limiting plate; 4. connecting cover; 5. connecting pipe; 6. first limiting ring; 7. first valve; 8. display meter; 9. temperature detection head; 10. flow rate detection head; 11. collecting pipe; 12. second connecting pipe; 13. second valve; 14. insert rod; 15. piston; 16. sealing gasket; 17. pull ring; 18. second limiting ring; 19. connecting ring; 20. fixing plate; 21. first threaded rod; 22. connecting plate; 23. connecting frame; 24. nut; 25. second limiting plate; 26. second threaded rod; 27. rotating disk; 28. moving slider; 29. splint. DETAILED DESCRIPTION

[0025] The following will be combined with 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] As attached Figure 1-5 The exhaust sampling device for a heavy-duty diesel truck shown in the figure includes a first connecting pipe 1, one end of the first connecting pipe 1 is fixedly connected to a connecting bucket 2, which is convenient for connecting the connecting bucket 2 to the outlet end of the truck exhaust pipe and is convenient for adapting to truck exhaust pipes of different sizes for connection and use, and the other end is fixedly connected to a first limiting plate 3, and the end of the first connecting pipe 1 close to the first limiting plate 3 is sleeved with a connecting cover 4, which is limited by the first limiting plate 3, and the discharge pipe of the first connecting pipe 1 is conveniently connected to the purification box through the connecting cover 4, and a connecting pipe 5 is fixedly connected to the top of the first connecting pipe 1, and is conveniently connected to the collecting pipe 11 through the connecting pipe 5, so that exhaust sampling can be carried out at any time, and a first valve 7 is provided in the middle of the connecting pipe 5 to facilitate the opening and closing of the middle part of the connecting pipe 5;

[0027] A connection fastening mechanism is provided at one end of the first connecting pipe 1 close to the connecting bucket 2. A display meter 8 is connected to the top of the first connecting pipe 1. A temperature detection head 9 and a flow rate detection head 10 are provided at a position corresponding to the display meter 8 in the middle of the first connecting pipe 1. The connection fastening mechanism can facilitate the connection of the connecting bucket 2 to different truck exhaust pipes and facilitate fixation, thereby improving the sealing strength of the fixation. In addition, the cooperation between the display meter 8, the temperature detection head 9, and the flow rate detection head 10 facilitates real-time monitoring of the exhaust gas temperature and rate, which is convenient for observation.

[0028] One end of the connecting pipe 5 is connected to the collecting pipe 11, and the other end is inserted with a rod 14. One end of the collecting pipe 11 is fixedly connected to the second connecting pipe 12, and a second valve 13 is provided in the middle of the second connecting pipe 12. The two ends of the rod 14 are respectively fixedly connected with a piston 15 and a pull ring 17. A sealing gasket 16 is provided on one side of the piston 15 and is connected to the connecting pipe 5 through the second connecting pipe 12, so that the exhaust gas can be conveniently collected through the collecting pipe 11, and the opening and closing of the middle part of the second connecting pipe 12 can be conveniently controlled through the second valve 13. By pulling the pull ring 17 and controlling the movement of the piston 15 through the rod 14, the exhaust gas in the middle of the first connecting pipe 1 can be drawn into the interior of the collecting pipe 11 for collection, thereby improving the use effect.

[0029] As attached Figure 1-3 As shown, the diameter of the end of the connecting bucket 2 away from the first connecting pipe 1 is close to the diameter of the end of the first connecting pipe 1, a sealing gasket is provided in the middle of the connecting bucket 2, and the end of the first connecting pipe 1 close to the first limiting plate 3 is set to a right-angle structure. Through the connecting bucket 2 and the sealing gasket, it can be conveniently connected to the exhaust pipes of different diameters, and the sealing strength of the connection can be improved, and the gas input into the first connecting pipe 1 can be conveniently discharged.

[0030] As attached Figure 1 、 2 As shown in Figures 3 and 5, one end of the connecting pipe 5 is provided with a thread, and one end of the connecting pipe 5 extends to the interior of the second connecting pipe 12 and is threadedly connected to the inner cavity of the second connecting pipe 12. A first limiting ring 6 is provided on the middle fixed sleeve of the connecting pipe 5. The connecting pipe 5 and the second connecting pipe 12 are used to facilitate connection and disassembly of the collecting pipe 11, facilitate extraction of exhaust gas from trucks at different times, improve the use effect, and improve the stability of the connection between the collecting pipe 11 and the connecting pipe 5 through the first limiting ring 6, which plays a limiting role.

[0031] As attached Figure 1 、 2 As shown in Figure 5, the piston 15 is arranged in the middle of the collecting tube 11, the wall of the sealing gasket 16 is tightly fitted with the inner wall of the collecting tube 11, the pull ring 17 is arranged on the side of the collecting tube 11 away from the second connecting tube 12, and the first connecting tube 1 is fixedly sleeved with a second limiting ring 18 at one end close to the connecting bucket 2. The sealing gasket 16 can improve the moving sealing effect of the piston 15 inside the collecting tube 11, and the pull ring 17 can facilitate the movement control of the piston 15.

[0032] As attached Figure 1 、 2 As shown in Figure 4, the connecting and fastening mechanism includes a connecting ring 19 that is sleeved on one end of the first connecting pipe 1 near the connecting bucket 2. A fixing plate 20 is fixedly connected to the top of the connecting ring 19. A connecting frame 23 is provided on one side of the connecting bucket 2. The connecting and fastening mechanism can be conveniently connected to the first connecting pipe 1 through the connecting ring 19 without affecting the change of the position of the connecting frame 23.

[0033] As attached Figure 1 、 2 As shown in Figure 4, the top of the connecting frame 23 is fixedly connected to the connecting plate 22, and a first threaded rod 21 is inserted in the middle of the fixed plate 20. One end of the first threaded rod 21 is rotatably connected to the connecting plate 22, and one end of the first threaded rod 21 is fixedly connected to the second limit plate 25. A nut 24 is sleeved on the middle of the first threaded rod 21. By rotating the nut 24, the first threaded rod 21 is controlled to drive the connecting plate 22 to move toward one side of the connecting bucket 2. The connecting frame 23 can be adjusted to move toward one side of the connecting bucket 2, thereby adjusting the strength of the exhaust pipe inserted into the inside of the connecting bucket 2, thereby improving the sealing strength of the connection.

[0034] As attached Figure 1 、 2 As shown in Figure 4, the cross-sectional shape of the connecting frame 23 is set to be "U"-shaped, and a second threaded rod 26 is inserted into the middle of the nut 24. One end of the second threaded rod 26 is fixedly connected to a rotating disk 27. The threads at both ends of the second threaded rod 26 are symmetrical, and the two ends of the second threaded rod 26 are symmetrically sleeved with movable sliders 28. The bottom of the movable slider 28 is fixedly connected to a splint 29. By rotating the rotating disk 27, the second threaded rod 26 can be controlled to rotate, so that the movable slider 28 drives the splint 29 to move to the opposite side, so that the splint 29 clamps and fixes the exhaust pipe, which is convenient for installation and fixation.

[0035] The working principle of the utility model is as follows: when in use, it is only necessary to put the connecting bucket 2 on one end of the exhaust pipe of the truck exhaust, and move the two clamping plates 29 to both sides of the exhaust pipe, and control the clamping plates 29 to clamp the exhaust pipe by rotating the rotating disk 27, and then rotate the nut 24 to make the first threaded rod 21 drive the clamping plates 29 to pull toward one side of the connecting bucket 2 in turn, thereby improving the sealing strength of the connection between the exhaust pipe, the connecting bucket 2 and the first connecting pipe 1;

[0036] The end of the first connecting pipe 1 close to the connecting cover 4 can be connected to the purifier through the connecting cover 4, and the second connecting pipe 12 can be threaded into the middle of the connecting pipe 5 to connect the collecting pipe 11 to the connecting pipe 5;

[0037] Open the first valve 7 and the second valve 13, pull the pull ring 17 to draw the tail gas in the middle of the first connecting pipe 1 into the interior of the collection pipe 11, and turn the second valve 13 to close the second connecting pipe 12. The tail gas sampling can be carried out and can be collected at any time;

[0038] When the exhaust gas passes through the middle of the first connecting pipe 1, the exhaust gas flow rate and temperature are detected by the temperature detection head 9 and the flow rate detection head 10 and displayed on the surface of the display meter 8 for direct observation.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heavy-duty diesel truck exhaust sampling device, comprising a first connecting pipe (1), characterized in that: One end of the first connecting pipe (1) is fixedly connected to the connecting bucket (2), and the other end is fixedly connected to the first limiting plate (3); one end of the first connecting pipe (1) close to the first limiting plate (3) is sleeved with a connecting cover (4); the top of the first connecting pipe (1) is fixedly connected to a connecting pipe (5), and a first valve (7) is provided in the middle of the connecting pipe (5); A connection fastening mechanism is provided at one end of the first connecting tube (1) close to the connecting bucket (2); a display meter (8) is connected to the top of the first connecting tube (1); and a temperature detection head (9) and a flow rate detection head (10) are provided at a position corresponding to the display meter (8) in the middle of the first connecting tube (1); One end of the connecting pipe (5) is connected to a collecting pipe (11), and the other end is provided with an inserting rod (14). One end of the collecting pipe (11) is fixedly connected to a second connecting pipe (12), a second valve (13) is provided in the middle of the second connecting pipe (12), and both ends of the inserting rod (14) are respectively fixedly connected to a piston (15) and a pull ring (17), and a sealing gasket (16) is provided on one side of the piston (15).

2. A heavy-duty diesel truck exhaust sampling device according to claim 1, characterized in that: The diameter of the end of the connecting bucket (2) away from the first connecting tube (1) is close to the diameter of the end of the first connecting tube (1), a sealing gasket is provided in the middle of the connecting bucket (2), and the end of the first connecting tube (1) close to the first limiting plate (3) is provided in a right-angle structure.

3. The exhaust gas sampling device for a heavy-duty diesel truck according to claim 1, characterized in that: One end of the connecting pipe (5) is provided with a thread, and one end of the connecting pipe (5) extends into the interior of the second connecting pipe (12) and is threadedly connected to the inner cavity of the second connecting pipe (12), and a first limiting ring (6) is provided on the middle fixed sleeve of the connecting pipe (5).

4. A heavy-duty diesel truck exhaust sampling device according to claim 1, characterized in that: The piston (15) is arranged in the middle of the collecting tube (11), the wall of the sealing gasket (16) is tightly fitted with the inner wall of the collecting tube (11), the pull ring (17) is arranged on the side of the collecting tube (11) away from the second connecting tube (12), and a second limiting ring (18) is fixedly provided on one end of the first connecting tube (1) close to the connecting bucket (2).

5. The exhaust gas sampling device for heavy-duty diesel trucks according to claim 1, characterized in that: The connection fastening mechanism comprises a connection ring (19) sleeved on one end of the first connection pipe (1) close to the connection bucket (2), a fixing plate (20) being fixedly connected to the top of the connection ring (19), and a connection frame (23) being provided on one side of the connection bucket (2).

6. A heavy-duty diesel truck exhaust sampling device according to claim 5, characterized in that: The top of the connecting frame (23) is fixedly connected to a connecting plate (22), a first threaded rod (21) is inserted into the middle of the fixing plate (20), one end of the first threaded rod (21) is rotatably connected to the connecting plate (22), one end of the first threaded rod (21) is fixedly connected to a second limiting plate (25), and a nut (24) is sleeved on the middle of the first threaded rod (21).

7. The exhaust gas sampling device for a heavy-duty diesel truck according to claim 6, characterized in that: The cross-sectional shape of the connecting frame (23) is set to be "U"-shaped, and a second threaded rod (26) is inserted into the middle of the nut (24), one end of the second threaded rod (26) is fixedly connected to a rotating disk (27), the threads at both ends of the second threaded rod (26) are symmetrical, and the two ends of the second threaded rod (26) are symmetrically sleeved with movable sliders (28), and the bottom of the movable slider (28) is fixedly connected to a clamping plate (29).

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