Three-way catalyst with tail gas emission monitoring function

Abstract

The utility model relates to the technical field of three-way catalytic converters, in particular to a three-way catalytic converter with a tail gas emission monitoring function, which comprises a threaded pipe and an oxygen sensor. The anti-loosening mechanism comprises a nut cap fixedly connected to the surface of the oxygen sensor, and the inner wall of the nut cap is in threaded connection to the outer surface of the threaded pipe; according to the device, the oxygen sensor is installed on the threaded pipe through the nut cover, the nut cover is locked through the spring and the insertion block, then the resistance in the rotation process of the nut cover is increased, the insertion block is locked through the supporting block, and it is guaranteed that the insertion block is stably clamped in the nut cover; when the oxygen sensor is installed on the three-way catalytic converter, the oxygen sensor is easy to loosen on the three-way catalytic converter, and the oxygen sensor is locked through the nut cap, so that the stability of the oxygen sensor installed on the three-way catalytic converter is guaranteed, and the tail gas emission monitoring effect of the three-way catalytic converter is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of three-way catalytic converter technology, and in particular to a three-way catalytic converter with exhaust emission monitoring function. Background Technology

[0002] The three-way catalytic converter is the most important external purification device installed in the automobile exhaust system. It can convert harmful gases such as carbon monoxide, hydrocarbons and nitrogen oxides emitted from automobile exhaust into harmless carbon dioxide, water and nitrogen through oxidation and reduction reactions.

[0003] To ensure that the exhaust gas emitted by the three-way catalytic converter meets environmental standards, oxygen sensors are usually threaded and installed at both ends of the three-way catalytic converter. By comparing the data from the front and rear oxygen sensors, the electronic control unit can determine the working efficiency of the catalytic converter.

[0004] Then, the vibration force generated by the car during operation will be transmitted to the surface of the three-way catalytic converter, which can easily cause the oxygen sensor to become loose on the three-way catalytic converter, thereby affecting the monitoring effect of the exhaust emissions of the three-way catalytic converter.

[0005] Therefore, a three-way catalytic converter with exhaust emission monitoring function is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a three-way catalytic converter with exhaust emission monitoring function to solve the above-mentioned problems. This improves the problem that vibrations generated during vehicle operation are transmitted to the surface of the three-way catalytic converter, which can easily cause the oxygen sensor to become loose on the three-way catalytic converter.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a three-way catalytic converter with exhaust emission monitoring function, comprising: a threaded tube and an oxygen sensor; an anti-loosening mechanism, the anti-loosening mechanism comprising a nut cap fixedly connected to the surface of the oxygen sensor, the inner wall of the nut cap being threadedly connected to the outer surface of the threaded tube, an mounting ring being fixedly connected to the surface of the threaded tube, two inserts being slidably connected to the inner wall of the mounting ring, the surfaces of the inserts being engaged with the inner wall of the nut cap, a spring being fixedly connected to the opposite end of the insert and the mounting ring, and a support block being slidably connected to the inner wall of the mounting ring. The nut cap enables the oxygen sensor to be mounted on the threaded tube; the spring and the inserts lock the nut cap, thereby increasing the resistance during rotation of the nut cap; the support block locks the inserts, ensuring that the inserts are stably engaged within the nut cap, thus ensuring the stability of the nut cap threadedly mounted on the threaded tube, thereby ensuring the stability of the oxygen sensor mounted on the three-way catalytic converter, and ensuring the effective exhaust emission monitoring of the three-way catalytic converter.

[0008] Preferably, a slider is slidably connected to the inner wall of the mounting ring, and a first triangular block is fixedly connected to one side of the slider, with two second triangular blocks fixedly connected to one side of the support block. Through the slider, the first triangular block, and the second triangular block, unidirectional limiting of the movement direction of the support block is achieved, ensuring that the support block is stably located within the mounting ring, thereby ensuring the stability of the nut cap threaded onto the threaded pipe.

[0009] Preferably, a spring sheet is fixedly connected to one side of the slider, and the other side of the spring sheet is fixedly connected to the inner wall of the mounting ring.

[0010] Preferably, a rubber ring is fixedly connected to the bottom end of the nut cap, and the surface of the rubber ring is engaged with the inner wall of the mounting ring. The rubber ring ensures a seal when the nut cap is installed on the threaded pipe, preventing air leakage.

[0011] Preferably, a connecting block is fixedly connected to the lower end of the surface of the insert block.

[0012] Preferably, a fixing block is fixedly connected to the front end of the support block.

[0013] Preferably, a sliding rod is fixedly connected to the surface of the mounting ring, and the inner wall of the fixing block is slidably connected to the surface of the sliding rod. The sliding rod restricts the movement range of the fixing block, preventing it from detaching from the mounting ring.

[0014] The beneficial effects of this utility model are:

[0015] The oxygen sensor is mounted on the threaded tube using a nut cap. A spring and a plug are used to lock the nut cap, increasing the resistance during rotation. A support block is used to lock the plug, ensuring it is stably engaged within the nut cap. Compared to existing oxygen sensors that are prone to loosening on the catalytic converter after vibration, this method uses a nut cap to lock the sensor, ensuring its stability and guaranteeing effective monitoring of exhaust emissions.

[0016] By using the slider, the first triangular block, and the second triangular block, the direction of movement of the support block is unidirectionally limited, ensuring that the support block is stably located within the mounting ring, thereby ensuring the stability of the nut cap threaded on the threaded pipe. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is an exploded view of the threaded pipe and nut cap of this utility model;

[0019] Figure 3This is a schematic diagram of the anti-loosening mechanism of this utility model;

[0020] Figure 4 for Figure 3 A magnified view of A in the middle.

[0021] In the diagram: 1. Threaded pipe; 2. Oxygen sensor; 3. Anti-loosening mechanism; 31. Nut cap; 32. Mounting ring; 33. Spring; 34. Insert block; 35. Fixing block; 36. Sliding block; 37. First triangular block; 38. Second triangular block; 39. Spring piece; 310. Connecting block; 311. Moving rod; 312. Rubber ring; 313. Support block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In practical implementation: such as Figure 1-4 As shown, a three-way catalytic converter with exhaust emission monitoring function includes: a threaded tube 1 and an oxygen sensor 2; an anti-loosening mechanism 3, the anti-loosening mechanism 3 including a nut cap 31 fixedly connected to the surface of the oxygen sensor 2, the inner wall of the nut cap 31 being threadedly connected to the outer surface of the threaded tube 1, an mounting ring 32 being fixedly connected to the surface of the threaded tube 1, two inserts 34 being slidably connected to the inner wall of the mounting ring 32, the surface of the inserts 34 being snapped into the inner wall of the nut cap 31, a spring 33 being fixedly connected to the opposite end of the inserts 34 and the mounting ring 32, and a support block 313 being slidably connected to the inner wall of the mounting ring 32.

[0024] The bottom end of the threaded tube 1 is fixedly connected to the upper surface of the three-way catalytic converter.

[0025] When it is necessary to monitor the exhaust gas of the three-way catalytic converter, insert the oxygen sensor 2 into the threaded pipe 1, rotate the nut cap 31 so that the nut cap 31 is threaded onto the threaded pipe 1. At this time, the elastic force of the spring 33 pushes the insert block 34 to move upward and engage with the inner wall of the nut cap 31, pushing the support block 313 to slide into the mounting ring 32, so that the bottom of the support block 313 abuts against the inner bottom wall of the mounting ring 32, and the top of the support block 313 abuts against the bottom end of the insert block 34, thereby locking the nut cap 31 and making the oxygen sensor 2 stably installed on the three-way catalytic converter. Install the three-way catalytic converter on the corresponding pipe of the car by bolt installation, and plug the connecting wire on the oxygen sensor 2 into the power supply system.

[0026] When a car is running, the three-way catalytic converter contains precious metal catalysts such as platinum, rhodium, and palladium. The exhaust gases generated during the car's operation are transported into the three-way catalytic converter, where harmful gases such as CO, HC, and NOx undergo oxidation-reduction reactions under the action of the catalyst. Specifically, CO is oxidized into colorless and non-toxic carbon dioxide at high temperatures, HC compounds are oxidized into water and CO2 at high temperatures, and NOx is reduced into nitrogen and oxygen, thereby achieving the purpose of purifying the exhaust gases.

[0027] Oxygen sensor 2, located at the front of the three-way catalytic converter, detects the oxygen content in the exhaust gas before it enters the catalytic converter, while oxygen sensor 2, located at the rear, detects the oxygen content in the exhaust gas after it has been treated by the catalytic converter. By comparing the data from the front and rear oxygen sensors 2, the electronic control unit can determine the working efficiency of the catalytic converter. If the difference between the data from the front and rear oxygen sensors 2 is very small, it indicates that the catalytic converter may have failed, because a properly functioning catalytic converter will cause a significant change in the oxygen content in the exhaust gas. Therefore, an alarm will be issued and the malfunction indicator lamp will be lit to remind the owner to have the vehicle inspected.

[0028] like Figure 2 and Figure 4 As shown, a slider 36 is slidably connected to the inner wall of the mounting ring 32. A first triangular block 37 is fixedly connected to one side of the slider 36 in an evenly distributed manner. Two second triangular blocks 38 are fixedly connected to one side of the support block 313. A spring piece 39 is fixedly connected to one side of the slider 36. The other side of the spring piece 39 is fixedly connected to the inner wall of the mounting ring 32. A rubber ring 312 is fixedly connected to the bottom end of the nut cover 31. The surface of the rubber ring 312 is snapped into the inner wall of the mounting ring 32.

[0029] The support block 313 drives the second triangular block 38 to slide into the mounting ring 32, so that the inclined surface of the second triangular block 38 abuts against the inclined surface of the first triangular block 37. As the support block 313 continues to move, it will drive the second triangular block 38 to move and abut against the inclined surface of the first triangular block 37, so that the first triangular block 37 is squeezed and pushes the slider 36 to squeeze the spring 39, thereby causing the support block 313 to move in one direction. After the support block 313 moves to a suitable position in the mounting ring 32, the elastic force of the spring 39 pushes the slider 36 and the first triangular block 37 to move, so that the inclined surface of the first triangular block 37 abuts against the inclined surface of the second triangular block 38.

[0030] like Figure 3 As shown, a connecting block 310 is fixedly connected to the lower end of the surface of the insert block 34, a fixing block 35 is fixedly connected to the front end of the support block 313, a moving rod 311 is fixedly connected to the surface of the mounting ring 32, and the inner wall of the fixing block 35 is slidably connected to the surface of the moving rod 311.

[0031] In use, the oxygen sensor 2 is inserted into the threaded tube 1. The nut cap 31 is rotated so that it is threaded onto the threaded tube 1, and the rubber ring 312 is engaged with the mounting ring 32. At this time, the elastic force of the spring 33 pushes the insert block 34 upward and engages with the inner wall of the nut cap 31, pushing the fixing block 35. This causes the support block 313 to drive the second triangular block 38 to slide into the mounting ring 32, causing the inclined surface on the second triangular block 38 to move on the inclined surface of the first triangular block 37. This, in turn, causes the first triangular block 37 to be compressed and push the slider. 36 squeezes the spring 39, thereby causing the support block 313 to move unidirectionally. After the support block 313 moves to a suitable position within the mounting ring 32, the elastic force of the spring 39 pushes the slider 36 and the first triangular block 37 to move, so that the inclined surface of the first triangular block 37 abuts against the inclined surface of the second triangular block 38, so that the bottom of the support block 313 abuts against the inner bottom wall of the mounting ring 32, and the top of the support block 313 abuts against the bottom end of the insert block 34 and the end of the fixing block 35, thereby locking the nut cover 31 and making the oxygen sensor 2 stably installed on the three-way catalytic converter.

[0032] It should be noted that the threaded tube 1, oxygen sensor 2, nut cap 31 and mounting ring 32 mentioned above are all devices with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the oxygen sensor 2 can be powered by the built-in power supply or by the mains power. The specific power supply method can be selected according to the situation, which will not be elaborated here.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A three-way catalyst having a tail gas emission monitoring function, characterized by comprising: Include: Threaded pipe (1) and oxygen sensor (2); Anti-loose mechanism (3), the anti-loose mechanism (3) includes the screw cap cover (31) fixedly connected to the surface of oxygen sensor (2), the inner wall of screw cap cover (31) is connected to the outer surface of threaded pipe (1), the surface of threaded pipe (1) is fixedly connected with mounting ring (32), the inner wall of mounting ring (32) is slidably connected with two plug blocks (34), the surface of plug block (34) is clamped to the inner wall of screw cap cover (31), the opposite end of plug block (34) and mounting ring (32) is fixedly connected with spring (33), the inner wall of mounting ring (32) is slidably connected with support block (313).

2. The three-way catalyst with tail gas emission monitoring function according to claim 1, characterized in that: The inner wall of mounting ring (32) is slidably connected with sliding block (36), one side of sliding block (36) is fixedly connected with first triangular block (37) of equal column distribution, one side of support block (313) is fixedly connected with two second triangular blocks (38).

3. The three-way catalyst with tail gas emission monitoring function according to claim 2, characterized in that: One side of sliding block (36) is fixedly connected with spring piece (39), the other side of spring piece (39) is fixedly connected to the inner wall of mounting ring (32).

4. The three-way catalyst with tail gas emission monitoring function according to claim 1, characterized in that: The bottom end of screw cap cover (31) is fixedly connected with rubber ring (312), the surface of rubber ring (312) is clamped to the inner wall of mounting ring (32).

5. The three-way catalyst with tail gas emission monitoring function according to claim 1, characterized in that: The surface lower end of plug block (34) is fixedly connected with connecting block (310).

6. The three-way catalyst with tail gas emission monitoring function according to claim 1, characterized in that: The front end of support block (313) is fixedly connected with fixed block (35).

7. The three-way catalyst according to claim 6, characterized in that: The surface of mounting ring (32) is fixedly connected with shift rod (311), the inner wall of fixed block (35) is slidably connected to the surface of shift rod (311).

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