Exhaust temperature sensor high-temperature durability test bench

Abstract

The utility model relates to the technical field of exhaust temperature sensor tests, in particular to a high-temperature durability test bench for an exhaust temperature sensor. The lifting module is connected with the heating assembly through a connecting piece; each heating assembly comprises a heating unit and a mounting plate, the heating units are mounted on a working table plate of the rack, the mounting plates are located above the heating units, the mounting plates are connected with the lifting modules through connecting pieces, and to-be-tested pieces are inserted into the mounting plates and are driven by the lifting modules to be inserted into the heating units. The device can detect a plurality of exhaust temperature sensors at the same time, is used for testing whether an open circuit occurs in a to-be-detected piece or not, testing whether signals exist in disconnection or not, testing the signal continuity of the exhaust temperature sensors, and improving the compatibility and space utilization rate of products. According to the utility model, hard contact between the tip of the exhaust temperature sensor and the tip of the temperature sensor is prevented through the elastic piece, signals are ensured not to be interfered, the service life is prolonged, the test accuracy and test precision of the exhaust temperature sensor are also improved, and the safety coefficient is high.

Description

Technical Field

[0001] This utility model relates to the field of exhaust temperature sensor testing technology, and in particular to a high-temperature durability test bench for exhaust temperature sensors. Background Technology

[0002] The urea temperature exhaust sensor is a sensor specifically designed to measure the temperature of the urea solution in the selective catalytic reduction (SCR) system of diesel vehicles. Urea temperature exhaust sensors typically employ NTC (negative temperature coefficient) thermistor technology. This type of sensor's resistance decreases as temperature increases, thus enabling temperature measurement. This sensor is used to measure the urea temperature in the SCR system, ensuring the urea solution remains within a suitable temperature range for the SCR system to function properly. The urea temperature exhaust sensor is crucial for maintaining the effective operation of the SCR system. By monitoring the urea solution temperature, it helps the control system operate under optimal conditions, reducing nitrogen oxide emissions and protecting the environment.

[0003] Existing test benches for testing the durability of exhaust temperature sensors have the following drawbacks:

[0004] 1. Due to the large number of models of exhaust temperature sensors, the existing test benches have poor compatibility, or the space utilization is reduced by reducing the number of tests.

[0005] 2. During the test, the exhaust temperature sensor and the temperature sensor are in hard contact, which can easily cause mechanical damage to both the exhaust temperature sensor and the temperature sensor. Damage to the sensor can lead to signal interference, affecting the accuracy and precision of the test, and also poses certain safety hazards. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a high-temperature durability test bench for a temperature exhaust sensor in order to solve the problems existing in the prior art mentioned above.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a high temperature durability test bench for exhaust temperature sensor, including a frame, on which a lifting module, several heating components and a control component are installed, and the lifting module is connected to the heating components through a connector;

[0008] Each heating component includes a heating unit and a mounting plate. The heating unit is mounted on the worktable of the frame, and the mounting plate is located above the heating unit. The mounting plate is connected to the lifting module via a connector. The test piece is inserted into the mounting plate and then driven into the heating unit by the lifting module.

[0009] Furthermore, the mounting plate has several holes on its surface, and each hole contains a locking device for mounting the test piece. The test piece is inserted into the locking device and locked in place.

[0010] Furthermore, the heating unit is a heating tube or a heating furnace.

[0011] Furthermore, the heating unit includes symmetrically arranged support plates and several heating tubes. A crossbeam is erected between the two support plates. Several mounting holes are opened on the surface of the crossbeam, corresponding to the insertion holes in the mounting plate. The heating tubes are installed in the mounting holes. The insertion holes and mounting holes are staggered on the mounting plate and the crossbeam to improve the adaptability of the device under test and to increase the number of tests after meeting the above conditions.

[0012] Furthermore, a temperature sensor is installed at the bottom of the heating tube. One end of the temperature sensor is electrically connected to the control device via a wire, and the other end of the temperature sensor is inserted into the heating tube. An elastic element is fitted on the part of the temperature sensor that is not inserted into the heating tube to prevent hard impact between the test piece inserted into the heating tube and the temperature sensor, thus buffering the temperature sensor and the test piece and improving their service life.

[0013] Furthermore, a first mounting plate and a second mounting plate are installed sequentially from top to bottom between the two support plates. The first mounting plate and the second mounting plate are located below the crossbeam, and the elastic element is located between the first mounting plate and the second mounting plate.

[0014] Furthermore, the lifting module is equipped with several air blowing components, with the air outlet of each air blowing component facing the corresponding heating component.

[0015] Furthermore, the crossbeams are filled with thermal insulation material, which is either cotton or alumina.

[0016] Furthermore, the crossbeam is a one-piece molded structure.

[0017] Furthermore, heating wires are installed inside the furnace chamber of the heating furnace, and the top of the heating furnace has an opening, with the width of the mounting plate being greater than the width of the opening of the heating furnace.

[0018] The beneficial effects of this utility model are:

[0019] 1. The present invention has a simple structure and can simultaneously detect multiple exhaust temperature sensors to test whether the device under test has an open circuit, whether it still has a signal after being disconnected, and also to test the signal continuity of the exhaust temperature sensor. At the same time, the misalignment setting improves the compatibility and space utilization of the product.

[0020] 2. The elastic element prevents hard contact between the tip of the exhaust temperature sensor and the tip of the temperature sensor, reducing mechanical damage, ensuring signal interference, improving the service life of both the exhaust temperature sensor and the temperature sensor, and also improving the accuracy and precision of the exhaust temperature sensor test, while also having a high safety factor. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a structural schematic diagram of the lifting module and heating assembly of this utility model;

[0024] Figure 3 This is an exploded view of the heating unit in this utility model;

[0025] Figure 4 This is a utility model Figure 3 An exploded view from another direction;

[0026] In the diagram: 1. Frame, 2. Lifting module.

[0027] 3. Heating assembly; 31. Heating unit; 311. Support plate; 312. Crossbeam; 313. Heating tube; 314. Mounting hole; 315. Temperature sensor; 316. Elastic element; 317. First mounting plate; 318. Second mounting plate.

[0028] 32. Mounting plate, 33. Locking fastener, 34. Socket, 4. Connector, 5. Control assembly. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0030] Example 1:

[0031] like Figures 1-4 The high-temperature durability test bench for a temperature sensor shown includes a frame 1, on which a lifting module 2, several heating components 3 and a control component 5 are installed. The lifting module 2 is connected to the heating components 3 through a connector 4.

[0032] Each heating component 3 includes a heating unit 31 and a mounting plate 32. The heating unit 31 is a heating tube and is mounted on the workbench of the frame 1. The mounting plate 32 is located above the heating unit 31 and is connected to the lifting module 2 through a connector 4. The test piece is inserted into the mounting plate 32 and then driven into the heating unit 31 by the lifting module 2.

[0033] The mounting plate 32 has several holes 34 on its surface. Each hole 34 has a locking device 33 for mounting the test piece. The test piece is inserted into the locking device 33 and locked.

[0034] like Figures 2-3 As shown, the heating unit 31 includes symmetrically arranged support plates 311 and several heating tubes 313. A crossbeam 312 is erected between the two support plates 311. Several mounting holes 314 are opened on the surface of the crossbeam 312, which correspond to the insertion holes 34 in the mounting plate 32. The heating tubes 313 are installed in the mounting holes 314. The insertion holes 34 and the mounting holes 314 are staggered on the mounting plate 32 and the crossbeam 312 in order to improve the adaptability of the device to be tested and increase the number of tests after meeting the above conditions.

[0035] like Figures 3-4 As shown, a temperature sensor 315 is installed at the bottom of the heating tube 313. One end of the temperature sensor 315 is electrically connected to the control device via a wire, and the other end of the temperature sensor 315 is inserted into the heating tube 313. An elastic element 316 is fitted on the part of the temperature sensor 315 that is not inserted into the heating tube 313 to prevent hard impact between the test piece inserted into the heating tube 313 and the temperature sensor 315, thereby buffering the temperature sensor 315 and the test piece and improving their service life.

[0036] The crossbeam 312 is filled with insulating material, which is cotton or alumina, to keep the heating tube 313 warm, thereby ensuring the temperature of the heating tube 313, reducing the heating time of the heating tube 313, and improving work efficiency.

[0037] Alternatively, the crossbeam 312 can also be a one-piece molded structure.

[0038] like Figures 3-4 As shown, a first mounting plate 317 and a second mounting plate 318 are installed between the two support plates 311 from top to bottom. The first mounting plate 317 and the second mounting plate 318 are located below the crossbeam 312, and the elastic element 316 is located between the first mounting plate 317 and the second mounting plate 318.

[0039] In addition, several air blowing components are installed on the lifting module 2, with the air blowing nozzle of each air blowing component facing the corresponding heating component 3, in order to accelerate the cooling of the test piece and further improve the testing efficiency.

[0040] Multiple mounting plates 32 and blowing components can be installed on the lifting module 2 as needed. There can be 2, 3, 4 or more, depending on the customer's requirements. The tip of the test piece has a chip, which connects the test piece to the control component.

[0041] Work process:

[0042] Step 1: Install the test piece in the mounting plate 32 and tighten it at the same time. Install the test piece on the mounting plate 32, and at the same time, the holes 34 in the mounting plate 32 are staggered. Each hole 34 is set to correspond one-to-one with several heating tubes 313 installed below it, thus completing the installation of the test piece.

[0043] Step 2: The control component 5 sets the test program and starts the test. The lifting module 2 drives the mounting plate 32 to descend to the test height through the connector 4. At this time, the test piece is inserted into the corresponding heating tube 313.

[0044] Step 3: After a period of time, the heating tube 313 begins to heat up. After heating for a certain period of time and reaching the set temperature, the lifting module 2 moves the test piece upwards. At the same time, the fan cools the test piece until it reaches a certain temperature. Then, the lifting module 2 moves the test piece downwards again and inserts it into the heating tube 313 for heating. The next test begins, and this process is repeated multiple times.

[0045] Example 2:

[0046] The difference from Embodiment 1 is that the heating unit 31 is a heating furnace, the furnace chamber of which is equipped with heating wires, the top of the heating furnace has an opening, and the width of the mounting plate 32 is greater than the width of the opening of the heating furnace.

[0047] Step 1: Install the test piece in the mounting plate 32 and tighten it at the same time. Install the test piece on the mounting plate 32, and at the same time, the holes 34 in the mounting plate 32 are staggered. Each hole 34 is set to correspond one-to-one with several heating tubes 313 installed below it, thus completing the installation of the test piece.

[0048] Step 2: The control component 5 sets the test program and starts the test. The lifting module 2 drives the mounting plate 32 to descend to the test height through the connector 4. At this time, the test piece is inserted into the furnace chamber of the heating furnace, and the opening of the heating furnace is closed by the mounting plate 32.

[0049] Step 3: After a period of time, the heating wire in the heating furnace begins to heat up. After heating for a certain period of time and reaching the set temperature, the lifting module 2 moves the test piece upwards. At the same time, the fan cools the test piece until it reaches a certain temperature. Then, the lifting module 2 moves the test piece downwards again and inserts it into the furnace chamber of the heating furnace for heating. The next test begins, and this process is repeated multiple times.

[0050] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A temperature sensor high temperature durability test bench, characterized in that: The utility model provides a heating test device, including frame (1), the frame (1) is installed with lifting module (2), several heating components (3) and control component (5), lifting module (2) is connected with heating component (3) through connecting piece (4); Each heating component (3) includes heating unit (31) and mounting plate (32), the heating unit (31) is installed on the workbench plate of frame (1), the mounting plate (32) is located above the heating unit (31), the mounting plate (32) is connected with lifting module (2) through connecting piece (4), and the test piece is inserted into the heating unit (31) by being inserted into the mounting plate (32) and being driven by lifting module (2).

2. The exhaust gas temperature sensor high temperature durability test bench according to claim 1, characterized in that: The plate surface of the mounting plate (32) is provided with a plurality of insertion holes (34), and a locking piece (33) for mounting the test piece is mounted in each insertion hole (34).

3. The exhaust gas temperature sensor high temperature durability test bench of claim 1, wherein: The heating unit (31) is a heating pipe or a heating furnace.

4. The exhaust gas temperature sensor high temperature durability test bench according to claim 3, characterized in that: The heating unit (31) includes two symmetrical support plates (311) and a plurality of heating pipes (313), a cross beam (312) is arranged between the two support plates (311), a plurality of mounting holes (314) corresponding to the insertion holes (34) in the mounting plate (32) are formed in the plate surface of the cross beam (312), the heating pipes (313) are mounted in the mounting holes (314), and the insertion holes (34) and the mounting holes (314) are arranged in a staggered manner on the mounting plate (32) and the cross beam (312).

5. The exhaust gas temperature sensor high temperature durability test bench according to claim 4, characterized in that: A temperature sensor (315) is mounted at the bottom of the heating pipe (313), one end of the temperature sensor (315) is electrically connected to the control device through a wire, the other end of the temperature sensor (315) is partially inserted into the heating pipe (313), an elastic member (316) is sleeved on the rod of the temperature sensor (315) that is not inserted into the heating pipe (313), so as to prevent hard impact between the test piece inserted into the heating pipe (313) and the temperature sensor (315), buffer the temperature sensor (315) and the test piece, and improve the service life.

6. The exhaust gas temperature sensor high temperature durability test bench according to claim 5, characterized in that: A first mounting plate (317) and a second mounting plate (318) are sequentially mounted between the two support plates (311) from top to bottom, the first mounting plate (317) and the second mounting plate (318) are located below the cross beam (312), and the elastic member (316) is located between the first mounting plate (317) and the second mounting plate (318).

7. The exhaust gas temperature sensor high temperature durability test bench according to claim 1, characterized in that: A plurality of blowing assemblies are mounted on the lifting module (2), and the blowing port of each blowing assembly faces the corresponding heating component (3).

8. The exhaust gas temperature sensor high temperature durability test bench according to claim 4, characterized in that: The cross beam (312) is filled with a heat preservation filler, and the heat preservation filler is cotton or aluminum oxide.

9. The exhaust gas temperature sensor high temperature durability test bench according to claim 8, characterized in that: The cross beam (312) is an integral molding structure.

10. The exhaust gas temperature sensor high temperature durability test bench of claim 3, wherein: A heating wire is mounted in the hearth of the heating furnace, the top end of the heating furnace has an opening, and the width of the mounting plate (32) is greater than the width of the opening of the heating furnace.

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