A urea sensor airtight test bench

Abstract

The utility model discloses a kind of urea sensor airtight test platform, belong to airtight test technical field, including platform, support plate is fixed on platform, limiting plate is set on support plate, positioning assembly is set on limiting plate, support plate is provided with push plate and the drive component of driving push plate translation, round groove is opened in push plate side face, air hole is opened in round groove, connector is installed on air hole, airtight tester is installed on support plate, airtight tester is connected with connector by hose;Use urea sensor airtight test platform, can automatically carry out airtightness test to sensor, sealing effect is good, test precision is high, it is convenient for worker to operate use.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to an airtightness testing platform for a urea sensor. Background Technology

[0002] In the manufacturing and maintenance process of urea sensors, airtightness is a core indicator determining their performance and service life. As a key component of the SCR exhaust treatment system in diesel vehicles, urea sensors need to operate for extended periods in high-temperature, high-pressure, and corrosive urea solution environments. If airtightness defects exist (such as leakage at welded joints, housing cracks, or poor interface sealing), urea solution will seep into the sensor, corroding core components such as the ultrasonic probe and circuit board, leading to decreased detection accuracy, signal drift, or even functional failure.

[0003] Traditional testing equipment often uses manual hand-held sealing heads to connect to the sensor interface, which results in insufficient sealing reliability and poor test positioning accuracy. Therefore, there is an urgent need to design a urea sensor airtightness testing bench to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a urea sensor airtightness testing platform to solve the problem that existing testing equipment often uses manual handheld sealing heads to connect to the sensor interface, resulting in insufficient sealing reliability and thus poor test positioning accuracy.

[0005] To solve the above technical problems, this utility model provides a urea sensor airtightness test bench, including a platform, a support plate fixed on the platform, a limit plate provided on the support plate, a positioning component provided on the limit plate, a push plate and a driving component for driving the push plate to move horizontally on the support plate, a circular groove opened on the side of the push plate, an air hole opened in the circular groove, and a connector installed on the air hole; An airtightness tester is mounted on the support plate, and the airtightness tester is connected to the connector via a flexible hose.

[0006] As a further improvement to the above technical solution: Optionally, the positioning component includes a positioning rod and a connecting block. The positioning rod is slidably connected to the limiting plate, the connecting block is fixed to the positioning rod, and the connecting block is connected to the support plate by a spring surrounding the side of the positioning rod. The support plate has several equidistantly distributed positioning slots, and the bottom end of the positioning rod is located in the positioning slot.

[0007] Optionally, slide rails are provided on both sides of the support plate, the slide rails are fixed to the support plate, and slide seats that are slidably connected to the slide rails are fixed at both ends of the bottom surface of the limiting plate.

[0008] Optionally, an arc-shaped pad is fixed on the support plate to support the urea sensor.

[0009] Optionally, two limiting blocks are fixed to the side of the limiting plate.

[0010] Optionally, the drive component is a cylinder, which is mounted on the support plate.

[0011] In the urea sensor airtightness testing stand provided by this utility model, a support plate is fixed on the platform, a limit plate is provided on the support plate, a positioning component is provided on the limit plate, a push plate and a driving component for driving the push plate to move are provided on the support plate, a circular groove is opened on the side of the push plate, an air hole is opened in the circular groove, a connector is installed on the air hole, an airtightness tester is installed on the support plate, and the airtightness tester is connected to the connector via a flexible hose; using the urea sensor airtightness testing stand, the airtightness of the sensor can be automatically tested, with good sealing effect, high testing accuracy, and convenient operation by workers. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the airtightness test bench for the urea sensor provided by this utility model; Figure 2 This is a partial top view of the urea sensor airtightness test bench provided by this utility model; Figure 3 yes Figure 2 Sectional view of AA; Figure 4 yes Figure 3 Enlarged view of B in the middle; Figure 5 yes Figure 3 A magnified view of C. Detailed Implementation

[0013] 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.

[0014] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0016] This utility model provides a urea sensor airtightness testing platform, the structure of which is as follows: Figure 1-5 As shown, the system includes a platform 1, a support plate 2 fixed on the platform 1, a limit plate 4 on the support plate 2, a positioning component on the limit plate 4, a push plate 6 and a drive component for driving the push plate 6 to move on the support plate 2, a circular groove 7 on the side of the push plate 6, an air hole 8 in the circular groove 7, a connector 9 installed on the air hole 8, and an air tightness tester 3 installed on the support plate 2. The air tightness tester 3 and the connector 9 are connected by a flexible hose 10. Using the urea sensor air tightness tester, the air tightness of the sensor can be automatically tested, resulting in good sealing performance, high testing accuracy, and convenient operation for workers.

[0017] Specifically, the positioning assembly includes a positioning rod 16 and a connecting block 17. The positioning rod 16 is slidably connected to the limiting plate 4, and the connecting block 17 is fixed on the positioning rod 16. The connecting block 17 is connected to the support plate 2 by a spring 18 surrounding the side of the positioning rod 16. The support plate 2 has several equidistantly distributed positioning grooves 15. The bottom end of the positioning rod 16 is located in the positioning groove 15. Under the elastic action of the spring 18, the positioning rod 16 enters the positioning groove 15, thereby completing the positioning of the limiting plate 4.

[0018] Furthermore, slide rails 11 are provided on both sides of the support plate 2. The slide rails 11 are fixed on the support plate 2. Slide seats 12 that are slidably connected to the slide rails 11 are fixed at both ends of the bottom surface of the limiting plate 4 to support the stable movement of the limiting plate 4.

[0019] Furthermore, an arc-shaped pad 13 is fixed on the support plate 2 to support the urea sensor.

[0020] Furthermore, two limiting blocks 14 are fixed to the side of the limiting plate 4.

[0021] Specifically, the drive component is cylinder 5, which is mounted on support plate 2.

[0022] Operating procedures First, place the metal tube on the urea sensor to be tested on the arc-shaped pad 13 of the support plate 2, so that the metal tube of the sensor faces the push plate 6, ensuring that the sensor housing is in close contact with the arc-shaped pad 13 to avoid vibration during testing.

[0023] Then, cylinder 5 is activated, and the piston rod of cylinder 5 pushes the push plate 6 to move towards the limit plate 4 until the circular groove 7 of the push plate 6 fits into the metal tube port of the sensor, forming a sealed state. Then, the airtightness tester 3 is activated, and the airtightness tester 3 fills the metal tube of the sensor with gas at a preset pressure through the hose 10 and connector 9, and enters the pressure holding stage. The airtightness tester 3 monitors the pressure change in real time, records data such as leakage rate, and displays the test results.

[0024] Beneficial effects This device effectively solves the problem of poor testing accuracy in traditional testing equipment. By sliding the slide rail 11 of the limiting plate 4 in conjunction with the positioning groove 15 and positioning rod 16 of the positioning component, the limiting plate 4 is accurately positioned. With the help of the limiting block 14 and the arc-shaped pad 13, the sensor is doubly limited. The cylinder 5 drives the circular groove 7 of the push plate 6 to fit into the metal tube port of the sensor, forming a sealed state. With the automatic data detection of the airtightness tester 3, the testing time of a single sensor is greatly shortened and the efficiency is significantly improved.

[0025] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A urea sensor airtightness testing stand, characterized in that, The system includes a platform (1), a support plate (2) fixed on the platform (1), a limit plate (4) provided on the support plate (2), a positioning component provided on the limit plate (4), a push plate (6) and a driving component for driving the push plate (6) to move horizontally on the support plate (2), a circular groove (7) is opened on the side of the push plate (6), an air hole (8) is opened in the circular groove (7), and a connector (9) is installed on the air hole (8). An airtightness tester (3) is installed on the support plate (2), and the airtightness tester (3) is connected to the connector (9) via a hose (10).

2. The urea sensor airtightness testing stand as described in claim 1, characterized in that, The positioning assembly includes a positioning rod (16) and a connecting block (17). The positioning rod (16) is slidably connected to the limiting plate (4). The connecting block (17) is fixed on the positioning rod (16). The connecting block (17) is connected to the support plate (2) by a spring (18) surrounding the side of the positioning rod (16). The support plate (2) has several equally spaced positioning grooves (15), and the bottom end of the positioning rod (16) is located in the positioning groove (15).

3. The urea sensor airtightness testing stand as described in claim 1, characterized in that, The support plate (2) is provided with slide rails (11) on both sides. The slide rails (11) are fixed on the support plate (2). The bottom surfaces of the limiting plate (4) are fixed with slide seats (12) that are slidably connected to the slide rails (11).

4. The urea sensor airtightness testing bench as described in claim 1, characterized in that, An arc-shaped pad (13) is fixed on the support plate (2) to support the urea sensor.

5. The urea sensor airtightness testing bench as described in claim 1, characterized in that, The limiting plate (4) has two limiting blocks (14) fixed on its side.

6. The urea sensor airtightness testing stand as described in claim 1, characterized in that, The driving component is a cylinder (5), which is mounted on the support plate (2).

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