An automated vehicle exhaust gas sampling and detection device

Abstract

This invention provides an automated vehicle exhaust gas sampling and testing device, including an exhaust gas sampling mechanism. The sampling mechanism includes a gas delivery pipe, the end of which is connected to an insertion pipe via a threaded connector. A sealing strip is provided on the side of the insertion pipe. The sampling mechanism also includes a gas storage tank and a blower. An exhaust pipe is threadedly connected to the inlet end of the gas storage tank. This invention, by adding a multi-degree-of-freedom moving mechanism at the pipe opening, combined with the coordinated drive of an X-axis rodless cylinder, a rotary cylinder, a Z-axis rodless cylinder, and a Y-axis electric push rod, enables the insertion pipe to automatically adjust in the forward, backward, left, right, and up / down directions. Under the limiting and guiding action of the inverted T-shaped support plate, the limiting plate, and the guide rod, the stability and accuracy of the insertion process are maintained. Therefore, this invention overcomes the problems of manual insertion of the sampling insertion pipe, time-consuming and labor-intensive operation, and inaccurate sampling position in existing vehicle exhaust gas testing devices.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive testing and sampling equipment, and in particular to an automated automotive exhaust gas sampling and testing device. Background Technology

[0002] Vehicle exhaust contains large amounts of harmful gases such as carbon monoxide, nitrogen oxides, hydrocarbons, and particulate matter, which directly affect human health and air quality. With the continuous increase in the number of motor vehicles, the total amount of exhaust emissions from urban roads is gradually increasing, seriously impacting air quality. This makes it easier for people to directly inhale large amounts of exhaust fumes, causing health problems, various diseases, and even death. Therefore, regular testing of vehicle exhaust is necessary.

[0003] Existing vehicle exhaust emission testing devices are generally bulky and inconvenient to move. Furthermore, the sampling probes need to be manually inserted into the exhaust port for testing, which is time-consuming and labor-intensive. This not only results in low efficiency but also inaccurate sampling positions.

[0004] Therefore, an automated vehicle exhaust gas sampling and detection device is proposed. Utility Model Content

[0005] In view of this, the present invention provides an automated vehicle exhaust gas sampling and detection device to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial option.

[0006] The technical solution of this utility model is achieved as follows: an automated vehicle exhaust gas sampling and detection device, comprising...

[0007] An exhaust gas sampling mechanism includes an exhaust gas pipe, the end of which is connected to an insertion pipe via a threaded joint, and a sealing strip is provided on the side of the insertion pipe.

[0008] The exhaust gas sampling mechanism also includes a gas storage tank and a blower. The gas storage tank has an exhaust pipe threadedly connected to its inlet end, and the other end of the exhaust pipe is threadedly connected to the exhaust end of the blower. The blower's inlet end is threadedly connected to one end of a gas delivery pipe, and a gas sensor is installed inside the gas delivery pipe near the insertion tube.

[0009] The moving mechanism includes a base support frame;

[0010] An X-axis rodless cylinder is bolted to the inner side of the bottom support frame. A bearing is fixedly mounted on the sliding seat of the X-axis rodless cylinder. A turntable is coaxially fixedly connected to the inner ring of the bearing. A rotary cylinder is fixedly mounted on the bottom of the turntable. Connecting plates are bolted to both sides of the rotary cylinder. Both ends of the connecting plates are fixedly connected to the inner side of the bottom support frame. A fixed seat is bolted to the top of the turntable. A Z-axis rodless cylinder is bolted to the top side of the fixed seat. A Y-axis electric push rod is bolted to the sliding seat of the Z-axis rodless cylinder. An inverted T-shaped support plate is fixedly connected to the electric shaft end of the Y-axis electric push rod. A limiting hole adapted to the insertion tube is opened on the vertical plate of the inverted T-shaped support plate. The insertion tube passes through the limiting hole and is fixedly limited on the vertical plate of the inverted T-shaped support plate.

[0011] More preferably, a limiting plate is fixedly installed on one side of the fixed base. The limiting plate consists of three parallel vertical plates, each with a limiting groove. The electric shaft of the Y-axis electric push rod slides up and down in the limiting groove of the limiting plate. Guide rods are fixedly connected to both sides of the horizontal plate of the inverted T-shaped support plate by bolts. The guide rods pass through the limiting grooves on both sides of the limiting plate. A guide sleeve is slidably sleeved on the outer periphery of the guide rod. The guide sleeve is embedded and slidably fitted in the limiting groove in the Z-axis direction.

[0012] In a further preferred embodiment, the other side wall of the bottom support frame is bolted to a guide rail, and a guide block is embedded and slidably connected on the guide rail. The top of the guide block is fixedly connected to the outer ring of the bearing, and the guide block is symmetrically arranged with the sliding seat of the X-axis rodless cylinder.

[0013] More preferably, a remote PLC controller is installed on one side of the inverted T-shaped support plate. The remote PLC controller is used to control the movement of the X-axis rodless cylinder, the rotary cylinder, the Z-axis rodless cylinder, and the Y-axis electric push rod.

[0014] The present invention has the following advantages due to the adoption of the above technical solution:

[0015] This invention adds a multi-degree-of-freedom moving mechanism at the pipe opening, combined with the coordinated drive of an X-axis rodless cylinder, a rotary cylinder, a Z-axis rodless cylinder, and a Y-axis electric push rod, enabling the insertion tube to automatically adjust in the front-back, left-right, and up-down directions. Under the limiting and guiding action of the inverted T-shaped support plate, the limiting plate, and the guide rod, the stability and accuracy of the insertion process are maintained. Thus, this invention overcomes the problems of manual insertion, time-consuming and labor-intensive operation, and inaccurate sampling position of the sampling insertion tube in existing automobile exhaust gas detection devices.

[0016] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main body of this utility model;

[0019] Figure 2 This is a bottom view of the bottom support frame of this utility model;

[0020] Figure 3 This is a schematic diagram of the moving mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram showing the bottom support frame and the rotary cylinder of this utility model.

[0022] Figure 5 This is a schematic diagram showing the installation position of the gas sensor of this utility model.

[0023] In the diagram: 10. Exhaust gas sampling mechanism; 11. Gas storage tank; 12. Exhaust pipe; 13. Blower; 14. Gas delivery pipe; 15. Insertion pipe; 16. Sealing strip; 17. Gas sensor; 18. Remote PLC controller; 20. Moving mechanism; 21. Inverted T-shaped support plate; 22. X-axis rodless cylinder; 23. Rotary cylinder; 24. Bearing; 25. Turntable; 26. Fixed base; 27. Z-axis rodless cylinder; 28. Y-axis electric push rod; 29. ​​Limiting plate; 291. Limiting groove; 292. Guide rod; 293. Guide sleeve; 211. Bottom support frame; 212. Guide rail; 213. Guide block; 214. Connecting plate. Detailed Implementation

[0024] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] like Figure 1-5 As shown, this utility model embodiment provides an automated vehicle exhaust gas sampling and detection device, including an exhaust gas sampling mechanism 10 and a moving mechanism 20;

[0027] The exhaust gas sampling mechanism 10 is used to complete the sampling, collection, and pretreatment of vehicle exhaust gas. The exhaust gas sampling mechanism 10 includes an exhaust pipe 14, and the end of the exhaust pipe 14 is connected to an insertion pipe 15 through a threaded joint so that the insertion pipe 15 can be inserted into the exhaust port of the vehicle under test to achieve direct sampling of exhaust gas. In order to increase the sealing effect of the insertion pipe 15 when it is inserted into the exhaust pipe, a sealing strip 16 is provided on the side of its pipe wall, which can form contact with the inner wall of the exhaust pipe during the insertion process and has a better sealing effect.

[0028] The exhaust gas sampling mechanism 10 also includes a gas storage tank 11 and a blower 13; the air inlet of the gas storage tank 11 is connected to the exhaust pipe 12 by a threaded connection, and the other end of the exhaust pipe 12 is also connected to the exhaust end of the blower 13 by a threaded connection, thereby realizing the temporary storage of exhaust gas after sampling; the air inlet of the blower 13 is threadedly connected to one end of the gas delivery pipe 14, so that the gas from the exhaust pipe is drawn into the gas storage tank 11 through the gas delivery pipe 14. In order to monitor the exhaust gas composition in real time, a gas sensor 17 is provided in the gas delivery pipe 14 near the insertion pipe 15 to detect the gas composition parameters in the vehicle exhaust gas;

[0029] The moving mechanism 20 includes a base support frame 211; an X-axis rodless cylinder 22 is bolted to the inner side of the base support frame 211; a bearing 24 is bolted to the sliding seat of the X-axis rodless cylinder 22; a turntable 25 is coaxially connected to the inner ring of the bearing 24; a rotary cylinder 23 is bolted to the bottom of the turntable 25; connecting plates 214 are bolted to both sides of the rotary cylinder 23; both ends of the connecting plates 214 are fixedly connected to the inner side of the base support frame 211, thereby ensuring the stability of the rotary cylinder 23. The top of the turntable 25 is fixedly connected to a fixed seat 26 by bolts. A Z-axis rodless cylinder 27 is fixedly installed on the top side of the fixed seat 26 by bolts. A Y-axis electric push rod 28 is fixedly installed on the sliding seat of the Z-axis rodless cylinder 27 by bolts. An inverted T-shaped support plate 21 is fixedly connected to the electric shaft end of the Y-axis electric push rod 28. A limiting hole adapted to the insertion tube 15 is opened on the vertical plate of the inverted T-shaped support plate 21. The insertion tube 15 passes through the limiting hole and is fixedly limited on the vertical plate of the inverted T-shaped support plate 21.

[0030] In one embodiment, a limiting plate 29 is fixedly installed on one side of the fixed base 26. The limiting plate 29 consists of three parallel vertical plates, each with a limiting groove 291. The electric shaft of the Y-axis electric push rod 28 slides up and down within the limiting groove 291 of the limiting plate 29. Guide rods 292 are fixedly connected to both sides of the horizontal plate of the inverted T-shaped support plate 21 by bolts. The guide rods 292 pass through the limiting grooves 291 on both sides of the limiting plate 29, and guide sleeves 293 are slidably sleeved on the outer periphery of the guide rods 292. The guide sleeves 293 are embedded in the Z-axis and slide in the limiting grooves 291, thereby providing stable guidance for the Y-axis electric push rod 28 during its movement and preventing shaking or deviation.

[0031] In another embodiment, a guide rail 212 is fixedly connected to the other side wall of the bottom support frame 211 by bolts, and a guide block 213 is embedded and slidably connected on the guide rail 212; the top of the guide block 213 is fixedly connected to the outer ring of the bearing 24 and is symmetrically arranged with the sliding seat of the X-direction rodless cylinder 22, so as to play an auxiliary guiding and supporting role when the turntable 25 moves along the X direction, and ensure the stability of the overall operation.

[0032] In a further embodiment, a remote PLC controller 18 is installed on one side of the inverted T-shaped support plate 21. The remote PLC controller 18 is used to control the movement of the X-direction rodless cylinder 22, the rotary cylinder 23, the Z-direction rodless cylinder 27, and the Y-direction electric push rod 28.

[0033] It should be noted that the remote PLC controller 18 itself is not directly operated by the operator, but communicates with it through an external controller (such as a wireless control terminal). The external controller is controlled by the on-site personnel according to the position and status of the exhaust pipe of the vehicle being tested, thereby realizing the multi-degree-of-freedom coordinated movement of the sampling, so that the insertion tube 15 can automatically dock with the vehicle's exhaust pipe port, and complete the exhaust gas sampling process without the need for manual handling or fixing of the insertion tube 15, thus improving the detection efficiency and automation level.

[0034] In addition, the remote PLC controller 18 can be a Xinje XC series small PLC, which supports RS485 communication, etc. The external controller can be a domestic multi-button wireless remote controller, whose control signals are directly connected to the digital input port of the PLC.

[0035] Specifically, on-site personnel select the action mode on the external controller, such as "lifting", "rotating", "forward / backward", "insertion / exit". The external controller transmits the instruction to the remote PLC controller 18 via digital signals or communication protocols (common RS485, Ethernet Modbus TCP, etc.). After receiving the instruction, the remote PLC controller 18 outputs the corresponding electrical signals to the drive power supply according to the internal logic program, thereby realizing the action control of the X-axis rodless cylinder, rotary cylinder, Z-axis rodless cylinder and Y-axis electric push rod (this control method utilizes the existing PLC automation control principle).

[0036] In this way, on-site personnel do not need to directly contact the cylinders or electric push rods of the equipment body. They only need to operate on an external controller to remotely complete the coordinated movement of the sampling mechanism in multiple degrees of freedom, thereby achieving automatic docking of the insertion tube 15 with the vehicle's exhaust pipe.

[0037] When this utility model is in operation:

[0038] When the operator or host computer powers on the remote PLC controller 18, the PLC enters the standby program: the X-axis rodless cylinder 22, the rotary cylinder 23, the Z-axis rodless cylinder 27 and the Y-axis electric push rod 28 are controlled to reset to their original positions.

[0039] The remote PLC controller 18 controls the Z-axis rodless cylinder 27 to rise, so that the inverted T-shaped support plate 21 and the insertion tube 15 reach a height approximately equal to the exhaust port of the vehicle under test. Then, the rotary cylinder 23 is controlled to drive the turntable 25 to rotate, and the axis of the insertion tube 15 is adjusted to be basically in the same direction as the axis of the vehicle's exhaust pipe, so as to achieve rough angle alignment.

[0040] The two ends of the connecting plate 214 are fixed to the bottom support frame 211, so that the rotary cylinder 23 obtains rigid lateral support when rotating and outputting, and avoids bottom swaying when rotating.

[0041] Then, the X-axis rodless cylinder 22 is controlled to advance, and its sliding seat drives the bearing 24 and the upper assembly to approach the vehicle exhaust port along the X-axis on the bottom support frame 211. The outer ring of the bearing 24 forms a sliding guide with the guide block 213 and the guide rail 212, providing parallel support in the same direction for the X-axis advancement. The inner ring is coaxially fixed with the turntable 25 to ensure that the rotation positioning accuracy is not affected during the approach process.

[0042] By controlling the Y-axis electric push rod 28 to slowly extend, the inverted T-shaped support plate 21 carries the insertion tube 15 for axial fine adjustment and insertion along the Y-axis.

[0043] Limiting grooves 291 are provided on the three vertical plates of the limiting plate 29:

[0044] The electric shaft of the Y-axis electric push rod 28 slides up and down within the limiting groove 291 to provide auxiliary linear stroke guidance;

[0045] The guide rod 292 passes through the limiting groove 291 and is sleeved with the guide sleeve 293 on its outer periphery. The guide sleeve 293 is embedded and slidably fitted in the limiting groove 291 in the Z direction, forming a stable guide and anti-deviation constraint, ensuring that the insertion path and the exhaust port maintain good coaxiality.

[0046] When the end of the insertion tube 15 enters the vehicle's exhaust port, it continues to extend slightly, causing the sealing strip 16 on the outside of the tube to elastically compress and deform against the inner wall of the exhaust port, forming a circumferential sealing contact surface, reducing the mixing of outside air and the leakage of exhaust gas.

[0047] The limiting hole on the vertical plate of the inverted T-shaped support plate 21 radially limits the insertion tube 15, further stabilizing the insertion depth and direction. The insertion tube 15 can be pulled out from the insertion limiting hole, separating it from the inverted T-shaped support plate 21, thereby enabling the replacement of the insertion tube 15 or maintenance of the moving mechanism 20, etc.

[0048] After alignment, the blower 13 is started, and the gas from the exhaust port is drawn in by the gas supply pipe 14 and compressed through the exhaust end of the blower 13 to the exhaust pipe 12, and then enters the gas storage tank 11 to achieve sample gas retention.

[0049] The gas sensor 17 is arranged in the gas delivery pipe 14 near the insertion end and outputs the gas parameter type in real time.

[0050] After the sampling conditions are met, the blower 13 is turned off, the Y-axis electric push rod 28 is retracted in the reverse direction to release the pressure of the sealing strip 16, and the X-axis rodless cylinder 22 is retracted to make the sampling end retract from the vehicle exhaust port.

[0051] In practical applications, the motion control of the X-axis rodless cylinder 22, the rotary cylinder 23, the Z-axis rodless cylinder 27, and the Y-axis electric push rod 28 is executed by the remote PLC controller 18, but the specific action instructions are adjusted by the on-site operator according to the position of the exhaust pipe of the vehicle to be tested.

[0052] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An automated vehicle exhaust gas sampling and detection device, characterized in that: include The exhaust gas sampling mechanism (10) includes an exhaust pipe (14), the end of which is connected to an insertion pipe (15) via a threaded connector, and a sealing strip (16) is provided on the side of the insertion pipe (15). The moving mechanism (20) includes a bottom support frame (211). An X-axis rodless cylinder (22) is bolted to the inner side of the bottom support frame (211). A bearing (24) is fixedly mounted on the sliding seat of the X-axis rodless cylinder (22). A turntable (25) is coaxially fixedly connected to the inner ring of the bearing (24). A rotary cylinder (23) is fixedly mounted on the bottom of the turntable (25). A fixed seat (26) is bolted to the top of the turntable (25). The top side of the fixed seat (26) is bolted to the fixed seat (26). A Z-axis rodless cylinder (27) is fixedly installed. A Y-axis electric push rod (28) is fixedly installed on the sliding seat of the Z-axis rodless cylinder (27) by bolts. An inverted T-shaped support plate (21) is fixedly connected to the electric shaft end of the Y-axis electric push rod (28). A limiting hole adapted to the insertion tube (15) is opened on the vertical plate of the inverted T-shaped support plate (21). The insertion tube (15) passes through the limiting hole and is fixedly limited on the vertical plate of the inverted T-shaped support plate (21).

2. The automatic automobile exhaust sampling and detecting device according to claim 1, characterized in that: A limiting plate (29) is fixedly installed on one side of the fixed base (26). The limiting plate (29) consists of three parallel vertical plates, each with a limiting groove (291).

3. The device according to claim 2, wherein: The electric shaft of the Y-axis electric push rod (28) slides up and down on the limiting groove (291) of the limiting plate (29). The horizontal plates of the inverted T-shaped support plate (21) are fixedly connected to guide rods (292) by bolts. The guide rods (292) pass through the limiting grooves (291) on both sides of the limiting plate (29). The outer periphery of the guide rods (292) is slidably sleeved with guide sleeves (293). The guide sleeves (293) are embedded in and slide in the limiting grooves (291) in the Z direction.

4. The automatic automobile exhaust sampling and detecting device according to claim 3, characterized in that: The exhaust gas sampling mechanism (10) also includes a gas storage tank (11) and a blower (13). The gas storage tank (11) has an exhaust pipe (12) threadedly connected to its inlet end. The other end of the exhaust pipe (12) is threadedly connected to the exhaust end of the blower (13). The inlet end of the blower (13) is threadedly connected to one end of the gas delivery pipe (14). A gas sensor (17) is installed inside the gas delivery pipe (14) near the insertion pipe (15).

5. The automatic automobile exhaust sampling and detecting device according to claim 4, characterized in that: The other side wall of the bottom support frame (211) is connected to a guide rail (212) by bolts. A guide block (213) is embedded and slidably connected on the guide rail (212). The top of the guide block (213) is fixedly connected to the outer ring of the bearing (24). The guide block (213) is symmetrically arranged with the sliding seat of the X-direction rodless cylinder (22).

6. The automated vehicle exhaust gas sampling and detection device according to claim 5, characterized in that: The rotary cylinder (23) has connecting plates (214) on both sides by bolts, and both ends of the connecting plates (214) are fixedly connected to the inner side of the bottom support frame (211).

7. The automated vehicle exhaust gas sampling and detection device according to claim 6, characterized in that: A remote PLC controller (18) is installed on one side of the inverted T-shaped support plate (21). The remote PLC controller (18) is used to control the movement of the X-direction rodless cylinder (22), the rotary cylinder (23), the Z-direction rodless cylinder (27), and the Y-direction electric push rod (28).

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