Sealing clamp device for testing high-temperature tail gas sensor for vehicle

Abstract

The utility model relates to a sealing clamp device for testing a high-temperature tail gas sensor for a vehicle. The device comprises a base plate, a test piece is arranged on the base plate, the test piece is used for containing tail gas for testing operation, a measuring piece is arranged on the test piece and used for conducting sensing measurement operation on the tail gas in the test piece, and a plurality of mounting grooves used for being connected with the test piece are formed in the base plate. And the test piece is connected to the base plate through the mounting groove. According to the invention, a plurality of mounting grooves are formed in the base plate, a plurality of different types of sensors can be tested at the same time, the test efficiency is effectively improved, and the test accuracy and stability are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of fixtures, and particularly to a sealing fixture device for testing vehicle high-temperature exhaust gas sensors. Background Art

[0002] With the development of automotive technology, the production and usage of automobiles have increased sharply. Air pollution in many large cities has changed from coal-burning pollution to a mixed pollution of coal-burning and automobiles. Automobile exhaust emissions pollution has become an important source of air pollution in today's society. Common vehicle high-temperature gas sensors mainly include narrow-range oxygen sensors, wide-range oxygen sensors, NOX sensors, etc. Vehicle high-temperature exhaust gas sensors are key components used to sense specific pollution components in vehicle exhaust and simultaneously feedback to control the vehicle combustion system to reduce pollution emissions. Whether the combustion is complete directly affects the amount of pollutants in vehicle exhaust emissions. Installing gas sensors according to emission standard requirements is an effective means to monitor and feedback control vehicle exhaust emissions pollutants to reduce pollution.

[0003] In related technologies, the performance and stability of sensors play a decisive role in their function. The detection of sensor performance is carried out using an engine test bench, and the sensor is fixed on the engine test bench by bolts or plugging.

[0004] However, during the detection of the above-mentioned sensor fixed on the engine test bench, it is necessary to control the composition of the rich combustion atmosphere in the engine and set the timing of data sampling, resulting in the problem of low test efficiency. Summary of the Invention

[0005] Based on this, in view of the problem of low test efficiency, it is necessary to provide a sealing fixture device for testing vehicle high-temperature exhaust gas sensors.

[0006] A sealing fixture device for testing vehicle high-temperature exhaust gas sensors includes:

[0007] A base plate, on which a test piece is provided. The test piece is used to accommodate exhaust gas for testing operations. A measuring piece is provided on the test piece, and the measuring piece is used to perform sensing and measuring operations on the exhaust gas in the test piece. A plurality of installation grooves for connecting the test piece are opened on the base plate, and the test piece is connected to the base plate through the installation grooves.

[0008] In one embodiment, the test piece includes: a test tube, on which an external installation thread is provided. An internal installation thread matching the external installation thread is opened in the installation groove. The test tube is threadedly connected to the base plate, and the external installation thread and the internal installation thread are engaged with each other. An atmosphere pipeline is provided on the test tube, and the atmosphere pipeline is used to convey exhaust gas into the test tube.

[0009] In one embodiment, the test piece further includes: an atmosphere pipeline interface matching the size of the atmosphere pipeline is provided on the test tube, and the atmosphere pipeline is fixedly connected to the atmosphere pipeline interface.

[0010] In one embodiment, the measuring piece includes: a sensor, the sensor is arranged in the measuring tube, a connecting external thread is provided on the sensor, a connecting internal thread matching the connecting external thread is provided at one end of the measuring tube away from the base plate, the sensor is threadedly connected to the measuring tube, and the connecting external thread on the sensor meshes with the connecting internal thread on the measuring tube.

[0011] In one embodiment, the device further includes: an adjusting piece, and the adjusting piece is used to connect sensors and test tubes of different sizes.

[0012] In one embodiment, the adjusting piece includes: an adjusting connecting pipe, an adjusting external thread is provided on the adjusting connecting pipe, an adjusting internal thread matching the adjusting external thread is provided at one end of the test tube away from the base plate, the adjusting connecting pipe is threadedly connected to the test tube, the adjusting external thread on the adjusting connecting pipe meshes with the adjusting internal thread on the test tube, a connecting internal thread matching the connecting external thread of the sensor is provided at one end of the adjusting connecting pipe away from the base plate, the sensor is threadedly connected to the adjusting connecting pipe, and the connecting external thread on the sensor meshes with the connecting internal thread on the adjusting connecting pipe.

[0013] In one embodiment, the device further includes: a pressing block is provided on the sensor, a first gasket is provided on the pressing block, and the first gasket is pressed between the adjusting connecting pipe and the pressing block.

[0014] In one embodiment, the device further includes: a second gasket is provided on the adjusting connecting pipe, and the second gasket is pressed between the adjusting connecting pipe and the test tube.

[0015] In one embodiment, the device further includes: the first gasket is a gasket made of silicone rubber, and / or the second gasket is a gasket made of silicone rubber.

[0016] A method for using a sealing fixture device for testing a vehicle high-temperature exhaust gas sensor as described in any one of the above embodiments, characterized in that the method includes:

[0017] Mesh the installation external thread of the test tube with the installation internal thread on the base plate, and fix the test tube on the base plate by screwing.

[0018] Select an adjustment connecting pipe that matches the sensor, sleeved the second gasket on the adjustment external thread of the adjustment connecting pipe, mesh the adjustment external thread on the adjustment connecting pipe with the adjustment internal thread on the test pipe, and tighten the second gasket between the test pipe and the adjustment connecting pipe by screwing, so that the adjustment connecting pipe is fixed on the test pipe;

[0019] Sleeve the first gasket on the abutting block of the sensor, mesh the connecting external thread on the sensor with the connecting internal thread on the adjustment connecting pipe, and tighten the first gasket between the abutting block and the adjustment connecting pipe by screwing, so that the sensor is fixed on the adjustment connecting pipe.

[0020] The above-mentioned sealing fixture device for testing vehicle high-temperature exhaust gas sensors is connected through the base plate, the test piece, the measuring piece and the gas distribution system. The structure is simple, which simplifies the test bench for vehicle high-temperature sensors. Compared with the existing crimping fixture, a knob-type fixture is adopted, and silicone rubber is selected as the sealing ring. While ensuring airtightness, it is not only easy to control the atmosphere environment, but also effectively improves the operation convenience of the fixture; at the same time, the types of sensors that can be tested in this application are increased. Using a knob-type fixture, compared with a crimping fixture, sensors with a controller can also be easily tested; by adjusting the connecting pipe, the height between the sensor and the test pipe can be adjusted without changing the gas distribution transmission position of the gas distribution system, which is convenient to adjust to the best air intake position; this application can also test multiple different types of sensors at the same time by opening several installation slots on the base plate, effectively improving the test efficiency and ensuring the test accuracy and stability. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is an exploded schematic diagram of a sealing fixture device for testing vehicle high-temperature exhaust gas sensors in some embodiments of the present application.

[0023] Figure 2 It is a cross-sectional schematic diagram for showing the internal structure of the test pipe in some embodiments of the present application.

[0024] Figure 3 It is a cross-sectional schematic diagram for showing the internal structure of the adjustment connecting pipe in some embodiments of the present application.

[0025] Figure 4This is a cross-sectional schematic diagram for embodying the internal structure of the installation groove of the base plate in some embodiments of the present application.

[0026] Figure 5 This is a schematic diagram for embodying the structure in which a plurality of installation grooves are provided on the base plate in some embodiments of the present application.

[0027] Explanation of the reference numerals in the drawings:

[0028] 100. Base plate; 110. Installation groove; 200. Test piece; 210. Test tube; 212. Adjusting internal thread; 220. Installation external thread; 230. Installation internal thread; 240. Atmosphere pipeline; 300. Measuring piece; 310. Sensor; 312. Connecting external thread; 314. Tightening block; 400. Adjusting piece; 410. Adjusting connecting pipe; 412. Adjusting external thread; 414. Connecting internal thread; 510. First gasket; 520. Second gasket. Detailed implementation manners

[0029] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application with reference to the drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] In this application, unless otherwise clearly defined or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In this application, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0035] Refer to Figure 1 , Figure 1 FIG. shows an exploded schematic view of a sealing fixture device for testing a vehicle high-temperature exhaust gas sensor 310 in an embodiment of the present application. A sealing fixture device for testing a vehicle high-temperature exhaust gas sensor 310 provided by an embodiment of the present application includes a base plate 100. A test piece 200 is connected to the base plate 100. The test piece 200 is used to accommodate exhaust gas for testing operations. A measuring piece 300 is connected to the test piece 200. The measuring piece 300 is used to perform sensing and measuring operations on the exhaust gas in the test piece 200. A plurality of circular mounting grooves 110 for connecting the test piece 200 are formed on the base plate 100. The test piece 200 is connected to the base plate 100 through the mounting grooves 110.

[0036] Continue to refer to Figures 1 - 5, in some embodiments, the test tube 210 is provided with an external installation thread 220. An internal installation thread 230 matching the external installation thread 220 is provided in the installation groove 110. The test tube 210 is threadedly connected to the base plate 100. The external installation thread 220 and the internal installation thread 230 are engaged with each other. An atmosphere pipeline 240 is fixedly connected to the test tube 210. The atmosphere pipeline 240 is used to convey the tail gas into the test tube 210. The atmosphere pipeline 240 is hermetically connected to the test tube 210, ensuring the sealing performance between the test tube 210 and the atmosphere pipeline 240.

[0037] Referring to Figure 1 , in some embodiments, the measuring member 300 includes a sensor 310. The sensor 310 is arranged inside the measuring tube. An external connection thread 312 is provided on the sensor 310. An internal connection thread 414 matching the external connection thread 312 is provided at one end of the measuring tube away from the base plate 100. The sensor 310 is threadedly connected to the measuring tube. The external connection thread 312 of the sensor 310 and the internal connection thread 414 on the measuring tube are engaged with each other.

[0038] In this embodiment, by means of the mutual engagement of the external connection thread 312 and the internal connection thread 414, the sensor 310 is threadedly connected to the measuring tube in a rotational screwing manner, reducing the possibility of the threaded tube detaching from the measuring tube. At the same time, through the threaded screwing method, the sensor 310 with a controller can also be conveniently tested.

[0039] Referring to Figure 1 and Figure 2 , the adjusting member 400 includes a through adjusting connection pipe 410. An external adjusting thread 412 is provided on the adjusting connection pipe 410. An internal adjusting thread 212 matching the external adjusting thread 412 is provided at one end of the test tube 210 away from the base plate 100. The adjusting connection pipe 410 is threadedly connected to the test tube 210. The external adjusting thread 412 on the adjusting connection pipe 410 and the internal adjusting thread 212 on the test tube 210 are engaged with each other. An internal connection thread 414 matching the external connection thread 312 of the sensor 310 is provided at one end of the adjusting connection pipe 410 away from the base plate 100. The sensor 310 is threadedly connected to the adjusting connection pipe 410. The external connection thread 312 of the sensor 310 and the internal connection thread 414 on the adjusting connection pipe 410 are engaged with each other.

[0040] In this embodiment, different types of sensors 310 can be tested by selecting adjustment connecting pipes 410 of different sizes. The adjustment connecting pipe 410 corresponding to the size of the sensor 310 is selected, and the adjustment connecting pipe 410 is threadedly connected and screwed onto the test pipe 210. Then, the sensor 310 is threadedly connected and screwed onto the adjustment connecting pipe 410. Different sizes of adjustment connecting pipes 410 are selected to test sensors 310 of different sizes.

[0041] Referring to Figure 1 , a pressing block 314 (not shown in the figure) is provided on the sensor 310, and a first gasket 510 (not shown in the figure) is provided on the pressing block 314. The first gasket 510 is pressed between the adjustment connecting pipe 410 and the pressing block 314; a second gasket 520 is provided on the adjustment connecting pipe 410, and the second gasket 520 is pressed between the adjustment connecting pipe 410 and the test pipe 210; the first gasket 510 is a gasket made of silicone rubber, and / or the second gasket 520 is a gasket made of silicone rubber.

[0042] In this embodiment, by selecting the first gasket 510 and the second gasket 520 made of silicone rubber, the setting of the first gasket 510 further improves the airtightness between the sensor 310 and the adjustment connecting pipe 410, and the setting of the second gasket 520 further improves the airtightness between the adjustment connecting pipe 410 and the test pipe 210, thereby improving the overall airtightness of the device. During the test of high-temperature exhaust gas, it will not leak from the gap between the adjustment connecting pipe 410, the sensor 310 and the test pipe 210, resulting in inaccurate test data of the sensor 310, thereby improving the accuracy of the test data of the sensor 310.

[0043] This application is connected to the base plate 100, the test piece 200, the measuring piece 300 and the gas distribution system. The structure is simple, and the test bench for the vehicle high-temperature sensor 310 is simplified. Compared with the existing crimping fixture, a knob-type fixture is adopted, and silicone rubber is selected as the sealing ring. While ensuring airtightness, it is not only easy to control the atmosphere environment, but also effectively improves the operation convenience of the fixture; at the same time, the types of sensors 310 that can be tested in this application are increased. Using a knob-type fixture, compared with a crimping fixture, sensors 310 with controllers can also be easily tested; the height between the sensor 310 and the test pipe 210 is adjusted by the adjustment connecting pipe 410 without changing the gas distribution transmission position of the gas distribution system, which is convenient to adjust to the best air intake position; this application can also test multiple different types of sensors 310 at the same time by opening a number of installation slots 110 on the base plate 100, effectively improving the test efficiency and ensuring the test accuracy and stability.

[0044] During the installation of this application, the installation external thread 220 of the test tube 210 is meshed with the installation internal thread 230 on the base plate 100, and the test tube 210 is fixed on the base plate 100 by screwing; select an adjustment connecting pipe 410 that matches the sensor 310, sleeve the second gasket 520 on the adjustment external thread 412 of the adjustment connecting pipe 410, mesh the adjustment external thread 412 on the adjustment connecting pipe 410 with the adjustment internal thread 212 on the test tube 210, and screw to press the second gasket 520 tightly between the test tube 210 and the adjustment connecting pipe 410, so that the adjustment connecting pipe 410 is fixed on the test tube 210; sleeve the first gasket 510 on the abutting block 314 of the sensor 310, mesh the connecting external thread 312 on the sensor 310 with the connecting internal thread 414 on the adjustment connecting pipe 410, and screw to press the first gasket 510 tightly between the abutting block 314 and the adjustment connecting pipe 410, so that the sensor 310 is fixed on the adjustment connecting pipe 410. Start the gas distribution system to simulate automotive exhaust entering the test tube 210 through the atmosphere pipeline 240, and finally detect the exhaust gas in the test tube 210 through the sensor 310.

[0045] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0046] The above-described embodiments only represent several implementation manners of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of this application patent shall be subject to the appended claims.

Claims

1. A sealing fixture device for testing a high-temperature exhaust gas sensor for a vehicle, characterized in that: The clamp device comprises: A base plate, wherein a test piece is provided on the base plate, wherein the test piece is used to accommodate exhaust gas for testing operations, wherein a measuring piece is provided on the test piece, wherein the measuring piece is used to perform sensing and measuring operations on the exhaust gas in the test piece, wherein a plurality of mounting grooves for connecting the test piece are opened on the base plate, and wherein the test piece is connected to the base plate via the mounting grooves.

2. The sealing fixture device for testing a high-temperature exhaust gas sensor for a vehicle according to claim 1, characterized in that: The test piece comprises: A test tube, wherein the test tube is provided with an external mounting thread, the mounting groove is provided with an internal mounting thread matching the external mounting thread, the test tube is threadedly connected to the base plate, the external mounting thread and the internal mounting thread are meshed with each other, and the test tube is provided with an atmosphere pipeline, which is used to transport the exhaust gas into the test tube.

3. The sealing fixture device for testing a high-temperature exhaust gas sensor for a vehicle according to claim 1, characterized in that: The test piece also includes: An atmosphere pipeline interface matching the size of the atmosphere pipeline is provided on the test tube, and the atmosphere pipeline is fixedly connected to the atmosphere pipeline interface.

4. The sealing fixture device for testing a high-temperature exhaust gas sensor for a vehicle according to claim 1, characterized in that: The measuring element comprises: The sensor is arranged in a measuring tube, the sensor is provided with a connecting external thread, the end of the measuring tube away from the base plate is provided with a connecting internal thread matching the connecting external thread, the sensor is threadedly connected to the measuring tube, and the connecting external thread of the sensor is meshed with the connecting internal thread on the measuring tube.

5. The sealing fixture device for testing a high-temperature exhaust gas sensor for a vehicle according to claim 3, characterized in that: The device also includes: The adjusting piece is used to connect sensors and test tubes of different sizes.

6. The sealing fixture device for testing a high-temperature exhaust gas sensor for a vehicle according to claim 5, characterized in that: The adjusting member comprises: An adjusting connecting tube, wherein the adjusting connecting tube is provided with an adjusting external thread, the end of the test tube away from the base plate is provided with an adjusting internal thread matching the adjusting external thread, the adjusting connecting tube is threadedly connected to the test tube, the adjusting external thread on the adjusting connecting tube and the adjusting internal thread on the test tube are meshed with each other, the end of the adjusting connecting tube away from the base plate is provided with a connecting internal thread matching the connecting external thread of the sensor, the sensor is threadedly connected to the adjusting connecting tube, and the connecting external thread on the sensor and the connecting internal thread on the adjusting connecting tube are meshed with each other.

7. The sealing fixture device for testing a high-temperature exhaust gas sensor for a vehicle according to claim 6, characterized in that: The device also includes: The sensor is provided with a pressing block, the pressing block is provided with a first gasket, and the first gasket is pressed between the adjusting connecting pipe and the pressing block.

8. The sealing fixture device for testing a high-temperature exhaust gas sensor for a vehicle according to claim 6, characterized in that: The device also includes: The adjusting connecting tube is provided with a second gasket, and the second gasket is pressed tightly between the adjusting connecting tube and the testing tube.

9. The sealing fixture device for testing a high-temperature exhaust gas sensor for a vehicle according to claim 7, characterized in that: The device also includes: The first gasket is a gasket made of silicone rubber.

10. The sealing fixture device for testing a high-temperature exhaust gas sensor for a vehicle according to claim 8, characterized in that: The device also includes: The second gasket is a gasket made of silicone rubber.

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