Double-idling-method exhaust pollutant detection device for gasoline car

Abstract

The utility model belongs to the technical field of exhaust pollutant detection, and particularly relates to a gasoline car double-idle-speed exhaust pollutant detection device which comprises a detection box, a sampling fan is arranged on the inner side of the detection box, a tail gas analyzer is arranged at the bottom of the detection box and connected with the sampling fan through a connecting pipe, and an air suction pipe is arranged at the top of the detection box. One end of the air suction pipe extends into the detection box and is connected with a sampling fan, a fixed block is fixed to the other end of the air suction pipe, a sampling head communicated with the air suction pipe is fixed to one side of the fixed block, a plurality of mounting grooves are formed in the outer wall of the fixed block, electromagnets are slidably mounted in the mounting grooves, and springs are arranged at the tops of the electromagnets; the top end of the spring is fixed on the inner wall of the mounting groove; a storage battery is arranged on the inner top wall of the detection box; according to the sampling device, the fixed block and the sampling head can be limited and fixed, the sampling stability is improved, and the detection efficiency is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of exhaust pollutant detection, and specifically relates to an exhaust pollutant detection device of a gasoline vehicle using a dual idle method. Background Art

[0002] The dual idle method is an exhaust emission detection system, which is mainly used to detect the exhaust emission of vehicles, and is mainly used for road inspection of vehicle exhaust emissions.

[0003] The main principle of the dual idle method is to use an exhaust gas analyzer to measure the carbon monoxide (CO) and hydrocarbon (HC) content in the exhaust pollutants of a spark-ignition engine under high idle and idle conditions, and calculate and read the value of the excess air coefficient (λ). During the test, there will be a display to prompt the driver how to operate the vehicle, generally accelerating from idle to 70% of the rated speed, running for 30 seconds and then returning to idle state, then idling for 15 seconds, and using the instrument to read the average value within 30 seconds is the measurement result of idle pollutants.

[0004] The dual-idle exhaust pollutant detection device for gasoline vehicles mainly includes exhaust gas analyzer, sampling probe and connecting pipelines. When sampling, the sampling probe is inserted into the exhaust pipe of the vehicle to collect exhaust gas samples. During the detection process, the sampling probe needs to be inserted into the exhaust pipe to a certain depth (generally not less than 400mm) to ensure that the collected exhaust gas samples are representative.

[0005] The sampling probe currently used lacks an effective fixing mechanism after being inserted into the exhaust pipe, which causes the probe to move easily during the sampling process. This movement not only affects the accuracy and stability of the exhaust gas sample, but may also reduce the efficiency of the entire detection process, causing unnecessary troubles to the exhaust gas analysis work. Utility Model Content

[0006] The purpose of the utility model is to provide a gasoline vehicle dual idle method exhaust pollutant detection device, which can limit and fix the fixing block and the sampling head, improve the sampling stability, and further improve the detection efficiency.

[0007] The technical solutions adopted in this utility are as follows:

[0008] A dual-idle exhaust pollutant detection device for a gasoline vehicle comprises a detection box, a sampling fan is arranged on the inner side of the detection box, an exhaust gas analyzer is arranged on the bottom of the detection box, and the exhaust gas analyzer is connected to the sampling fan through a connecting pipe, an intake pipe is arranged on the top of the detection box, one end of the intake pipe extends into the detection box and is connected to the sampling fan, a fixing block is fixed to the other end of the intake pipe, a sampling head connected to the intake pipe is fixed to one side of the fixing block, a plurality of mounting grooves are opened on the outer wall of the fixing block, an electromagnet is slidably installed inside the mounting groove, a spring is arranged on the top of the electromagnet, and the top end of the spring is fixed to the inner wall of the mounting groove.

[0009] Furthermore, a battery is provided on the inner top wall of the detection box.

[0010] Furthermore, a control panel is provided on one side of the top of the detection box, and the control panel is electrically connected to the battery, the electromagnet, the sampling fan and the exhaust gas analyzer.

[0011] Furthermore, a telescopic guide rod is provided on the top of the electromagnet, and the top end of the telescopic guide rod is fixedly connected to the inner wall of the mounting groove.

[0012] Furthermore, support feet are provided at four corners of the bottom of the detection box.

[0013] Furthermore, a plurality of ball grooves are provided on the outer wall of the fixing block and located in the mounting groove, and balls are provided inside the ball grooves.

[0014] The technical effects achieved by this utility model are:

[0015] The practical dual-idling exhaust pollutant detection device for gasoline vehicles has an electromagnet which is provided with power to generate magnetic force after a fixing block and a sampling head are extended into appropriate positions of the exhaust pipe, so that the electromagnet generates magnetic force, and the electromagnet and the exhaust pipe are magnetically attracted to each other, and the fixing block and the sampling head are limited and fixed, thereby improving the sampling stability and further improving the detection efficiency. After the detection is completed, the electromagnet is powered off to lose its magnetic force, and is retracted into the installation groove through the elastic force of the spring, so that the fixing block and the sampling head are conveniently removed from the exhaust pipe. The provided ball bearing can effectively reduce the friction between the fixing block and the exhaust pipe, reduce the wear of the fixing block and the sampling head, and improve the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model in a front view;

[0017] Figure 2 This is a schematic diagram of the cutaway structure of the practical detection box;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the fixing block of the present invention.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1. Detection box; 2. Suction pipe; 3. Fixing block; 4. Sampling head; 5. Mounting slot; 6. Telescopic guide rod; 7. Electromagnet; 8. Spring; 9. Control panel; 10. Sampling fan; 11. Exhaust gas analyzer; 12. Battery; 13. Ball. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0022] like Figure 1-3 As shown, a dual-idle exhaust pollutant detection device for a gasoline vehicle comprises a detection box 1, a sampling fan 10 is arranged inside the detection box 1, an exhaust gas analyzer 11 is arranged at the bottom of the detection box 1, and is used to measure the content values ​​of carbon monoxide and hydrocarbons in the exhaust pollutants of the spark-ignition engine under high idle speed and idle speed conditions, and the exhaust gas analyzer 11 is connected to the sampling fan 10 through a connecting pipe, an intake pipe 2 is arranged on the top of the detection box 1, one end of the intake pipe 2 extends into the detection box 1 and is connected to the sampling fan 10, a fixing block 3 is fixed to the other end of the intake pipe 2, a sampling head 4 connected to the intake pipe 2 is fixed to one side of the fixing block 3, a plurality of mounting grooves 5 are opened on the outer wall of the fixing block 3, an electromagnet 7 is slidably installed inside the mounting groove 5, the model of the electromagnet 7 is JTZ-1, and the volume is relatively small, a spring 8 is arranged on the top of the electromagnet 7, and the spring 8 The top end is fixed to the inner wall of the mounting groove 5, and the structure is simple, which is convenient for limiting and fixing the sampling head 4 extending into the exhaust pipe to prevent it from moving during the detection process. After the sampling head 4 on the fixed block 3 is extended into the exhaust pipe, the electromagnet 7 is powered to generate magnetic force, so that the electromagnet 7 and the inner wall of the exhaust pipe are magnetically attracted to each other, and the fixed block 3 and the sampling head 4 are limited and fixed, which improves the stability of the equipment. The inner top wall of the detection box 1 is provided with a battery 12, which is convenient for the equipment to provide power, which is more practical. A control panel 9 is provided on one side of the top of the detection box 1. The control panel 9 is convenient for controlling the start of the control electromagnet 7, the sampling fan 10 and the exhaust gas analyzer 11. The control panel 9 is electrically connected to the battery 12, the electromagnet 7, the sampling fan 10 and the exhaust gas analyzer 11, so that the electrical connection of the equipment is relatively perfect, which is convenient for the normal use of the equipment.

[0023] like Figure 2 As shown, a telescopic guide rod 6 is provided on the top of the electromagnet 7, and the top of the telescopic guide rod 6 is fixedly connected to the inner wall of the mounting groove 5, so that the movement of the electromagnet 7 is relatively stable;

[0024] like Figure 1-2 As shown, the four corners of the bottom of the detection box 1 are provided with support feet, so that the detection box 1 can be supported by the support feet to be off the ground, thereby avoiding long-term contact with the ground and corrosion, thereby increasing the service life of the detection box 1;

[0025] like Figure 1 and 3 As shown, the outer wall of the fixed block 3 and the mounting groove 5 are provided with a plurality of ball grooves, and the interior of the ball grooves is provided with balls 13, and the balls 13 are in contact with the inner wall of the exhaust pipe, so that the fixed block 3 can move smoothly in the exhaust pipe, reduce the friction of the fixed block 3 and the exhaust pipe, reduce the wear of the fixed block 3 and the sampling head 4, and improve the service life of the equipment.

[0026] The working principle of the utility model is as follows: when in use, the sampling head 4 is inserted into the exhaust pipe, and then the electromagnet 7 is controlled by the control panel 9, so that the electromagnet 7 generates magnetic force, sucks the inner wall of the exhaust pipe, fixes the fixing block 3 and the sampling head 4, and the provided ball 13 enables the fixing block 3 and the sampling head 4 to move smoothly in the exhaust pipe, which can effectively reduce the friction of their movement, and then the sampling fan 10 and the exhaust gas analyzer 11 are started to suck the exhaust gas in the exhaust pipe into the exhaust gas analyzer 11 for analysis and detection. When the sampling head 4 is to be taken out, the electromagnet 7 is closed by the control panel 9, and the electromagnet 7 loses its magnetic force. Because of the elastic force of the spring 8, the electromagnet 7 is driven to retract into the mounting groove 5.

[0027] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. Gasoline vehicle dual idle method exhaust pollutant detection device, characterized by: The invention comprises a detection box (1), wherein a sampling fan (10) is arranged on the inner side of the detection box (1), an exhaust gas analyzer (11) is arranged on the bottom of the detection box (1), and the exhaust gas analyzer (11) is connected to the sampling fan (10) through a connecting pipe, an air intake pipe (2) is arranged on the top of the detection box (1), one end of the air intake pipe (2) extends into the detection box (1) and is connected to the sampling fan (10), a fixing block (3) is fixed on the other end of the air intake pipe (2), a sampling head (4) connected to the air intake pipe (2) is fixed on one side of the fixing block (3), a plurality of mounting grooves (5) are provided on the outer wall of the fixing block (3), an electromagnet (7) is slidably installed inside the mounting groove (5), a spring (8) is arranged on the top of the electromagnet (7), and the top end of the spring (8) is fixed to the inner wall of the mounting groove (5).

2. The dual-idle exhaust pollutant detection device for gasoline vehicles according to claim 1 is characterized in that: A storage battery (12) is provided on the inner top wall of the detection box (1).

3. The dual-idle exhaust pollutant detection device for gasoline vehicles according to claim 1 is characterized in that: A control panel (9) is provided on one side of the top of the detection box (1), and the control panel (9) is electrically connected to the battery (12), the electromagnet (7), the sampling fan (10) and the exhaust gas analyzer (11).

4. The dual-idle exhaust pollutant detection device for gasoline vehicles according to claim 1, characterized in that: A telescopic guide rod (6) is arranged on the top of the electromagnet (7), and the top end of the telescopic guide rod (6) is fixedly connected to the inner wall of the mounting groove (5).

5. The dual-idle exhaust pollutant detection device for gasoline vehicles according to claim 1, characterized in that: Support feet are arranged at the four corners of the bottom of the detection box (1).

6. The dual-idle exhaust pollutant detection device for gasoline vehicles according to claim 1, characterized in that: The outer wall of the fixing block (3) is provided with a plurality of ball grooves located in the mounting groove (5), and rolling balls (13) are arranged inside the ball grooves.

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