Airtightness test tool for NTC (Negative Temperature Coefficient) temperature sensor
By designing an NTC temperature sensor airtightness testing fixture, utilizing a pressure gauge, air valve, and sealing ring structure, the problems of long testing cycles and high costs in existing technologies are solved, enabling rapid and accurate airtightness testing, and adapting to the efficient production of new energy vehicle production lines.
Patent Information
- Application Number
- CN202520514594.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-24
AI Technical Summary
In the existing technology, the airtightness detection of automotive coolant NTC temperature sensors relies on high-cost flow-type detection equipment, resulting in long detection cycles and high costs, which makes it difficult to meet the high-efficiency cycle requirements of new energy vehicle production lines.
An airtightness testing fixture for an NTC temperature sensor was designed, comprising a pressure gauge, a pressure valve, and a pressure source. Through their coordinated operation, the fixture enables rapid inflation, pressure holding, and deflation. Combined with a sealing ring and a pull rod structure, it ensures the airtightness and accuracy of the testing process.
It shortens the testing time, improves testing efficiency and accuracy, adapts to the fast production pace of new energy vehicle production lines, and ensures the reliability and stability of testing results.
Smart Images
Figure CN223827243U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to NTC temperature sensor technical field, concretely is NTC temperature sensor air tightness test frock. BACKGROUND
[0002] Vehicle coolant NTC temperature sensor air tightness detection mainly relies on flow type detection equipment, and this technology realizes high accuracy detection through direct measurement of leakage amount, can accurately identify tiny leakage defects, meets the stringent requirements of new energy vehicles to sensor high reliability, but flow type detection equipment needs to be equipped with high accuracy flow sensor and complex control system, leads to equipment purchase and maintenance cost to be high, restricts large-scale industrial application, and detection process needs long time stable pressure and accurate measurement of trace leakage, and single detection cycle is long, difficult to meet the efficient rhythm demand of new energy vehicle production line.
[0003] Therefore, the utility model is provided. UTILITY MODEL CONTENT
[0004] The utility model discloses a NTC temperature sensor air tightness test frock, which solves the problems in the background technology.
[0005] To solve the above technical problems, the utility model provides a NTC temperature sensor air tightness test frock, which comprises an NTC temperature sensor and a test frock.
[0006] Further, the air pressure valve can release the pressure in the NTC temperature sensor after detection is completed, and prepare for the next detection.
[0007] Further, the test frock is provided with a sliding groove on the surface, a clamping plate is fixedly installed on the inner wall of the sliding groove, a clamping groove is formed in the top of the clamping plate for clamping the pull rod, a guide plate is fixedly installed on the side wall of the clamping plate, and a guide block is fixedly installed on the top of the inner wall of the sliding groove.
[0008] Further, the bottom of the test tool is fixedly connected with a sealing ring, a bottom ring is fixedly installed at the bottom of the sealing ring, the inner wall of the sealing ring can be tightly attached to the outer wall of the NTC temperature sensor after compression, a pull rod is rotatably installed at the inner wall of the bottom ring, and the top of the pull rod is clamped on the surface of the test tool.
[0009] Compared with the prior art, the utility model has the advantages that:
[0010] 1. The air tightness of the NTC temperature sensor is detected through the cooperative work of the air pressure valve and the pressure source, the processes of inflation, pressure maintaining, detection and exhaust are optimized, the detection time is shortened, the detection efficiency is improved, and the rapid production rhythm of the new energy automobile production line can be better adapted to.
[0011] 2. The inner wall of the sealing ring is tightly attached to the outer wall of the sensor through the downward pressing of the test tool, a reliable sealing environment is formed, gas or liquid leakage in the test process is prevented, and the accuracy and stability of the detection result are ensured. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is a structure diagram of the air tightness test of the NTC temperature sensor air tightness test tool. Figure 1 ;
[0013] Figure 2 It is a sealing structure diagram of the NTC temperature sensor air tightness test tool.
[0014] Figure 3 It is a structure diagram of the air tightness test of the NTC temperature sensor air tightness test tool. Figure 2 ;
[0015] Figure 4 It is a sealing equipment detection logic diagram of the NTC temperature sensor air tightness test tool.
[0016] In the figure: 1, NTC temperature sensor; 2, pressure gauge; 3, test tool; 4, air pressure valve; 5, pressure source; 6, connecting pipeline; 7, connecting hole; 8, sealing ring; 9, bottom ring; 10, pull rod; 11, guide plate; 12, clamping plate; 13, guide block; 14, sliding slot. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0018] Please refer toFigure 1 - Figure 4 This utility model provides a technical solution: an NTC temperature sensor airtightness testing fixture, including an NTC temperature sensor 1 and a testing fixture 3. The testing fixture 3 is used to fix and support the NTC temperature sensor 1. A connecting pipe 6 is fixedly connected to its bottom. A pressure gauge 2 is directly installed on the inner wall of the connecting pipe 6. The pressure gauge 2 can monitor and display the internal pressure value of the NTC temperature sensor 1 in real time and accurately, providing key data support for the testing process. At the same time, a pressure valve 4 is fixedly installed at the end of the connecting pipe 6. The pressure valve 4 is not only used to control the inflation and deflation of the NTC temperature sensor 1, but also to control the inflation process, so that the internal pressure of the NTC temperature sensor 1 reaches the preset pressure value, and maintains the pressure value for a period of time during the pressure holding stage. This control mechanism meets different testing needs, improves the flexibility and adaptability of the testing, and ensures the accuracy and reliability of the testing results. A pressure source 5 is also fixedly installed on the side of the pressure valve 4, providing a stable and adjustable air pressure for the testing, further ensuring the smooth progress of the testing process.
[0019] Please see Figure 1 , Figure 3 , Figure 4 This utility model provides a technical solution: an NTC temperature sensor airtightness testing fixture, including a pressure valve 4 that controls the inflation process to ensure that the NTC temperature sensor 1 reaches a preset pressure value, avoiding detection errors caused by excessive or insufficient pressure, improving detection accuracy, and effectively preventing damage to the NTC temperature sensor 1 that may be caused by excessive pressure. During the pressure holding stage, the pressure valve 4 can also maintain the pressure value for a period of time to ensure the stability of the test results.
[0020] Please see Figure 1 , Figure 3 , Figure 4 This utility model provides a technical solution: an NTC temperature sensor airtightness testing fixture, including a pressure valve 4 that has the ability to quickly release the internal pressure of the NTC temperature sensor 1 after the test is completed, so that the testing fixture 3 can be ready to carry out the next test immediately without having to wait for the pressure to dissipate naturally for a long time, thus shortening the test cycle and improving production efficiency.
[0021] Please see Figure 2 This utility model provides a technical solution: an NTC temperature sensor airtightness testing fixture, including a connection hole 7 on the inner wall of the testing fixture 3. The inner wall of the connection hole 7 matches the outer wall size of the NTC temperature sensor 1, ensuring that the NTC temperature sensor 1 can be stably installed in the testing fixture 3, thereby improving the accuracy and stability of the installation.
[0022] Please see Figure 2This utility model provides a technical solution: an NTC temperature sensor airtightness testing fixture, including a testing fixture 3 with a sealing ring 8 fixedly connected to the bottom, and a bottom ring 9 fixedly installed at the bottom of the sealing ring 8. When the testing fixture 3 is pressed down to install the NTC temperature sensor 1, the sealing ring 8 can be compressed. After compression, its inner wall fits against the outer wall of the NTC temperature sensor 1, forming a reliable sealing environment. During installation, the worker can also intuitively feel the compression of the sealing ring 8 by pressing down the testing fixture 3. After the sealing ring 8 is compressed, the inner diameter of the inner wall shrinks, which can then hold the NTC temperature sensor 1 in place. This ensures the stability of the installation and improves the convenience and reliability of the operation.
[0023] Please see Figure 2 This utility model provides a technical solution: an NTC temperature sensor airtightness testing fixture, including a pull rod 10 whose bottom is fixed to the inner wall of a bottom ring 9 by a rotatable mounting method, allowing the pull rod 10 to rotate around the central axis of the bottom ring 9 when subjected to external force. A slide groove 14 is directly formed on the surface of the testing fixture 3, serving as a guide channel for the pull rod 10. A retaining plate 12 is fixedly installed on the inner wall of the slide groove 14, and a retaining groove is formed on the top of the retaining plate 12 for engaging with the top of the pull rod 10. A guide plate 11 is fixedly installed on the side wall of the retaining plate 12, and its surface is designed as an inclined track to guide the movement direction of the pull rod 10. A guide block 13 is installed on the top of the inner wall of the slide groove 14, forming a cooperation with the guide plate 11. When the testing fixture 3 is pressed down, the guide block 13 pushes the pull rod 10 along the guide plate 11. The track slides to ensure that the pull rod 10 accurately enters the predetermined position. When fixed, the top of the pull rod 10 is engaged in the slot of the card plate 12, forming a locked state. At this time, the position of the pull rod 10 is fixed and cannot move freely, thus maintaining the protection and fixation of the NTC temperature sensor 1. When unlocking is required, the worker presses down on the test fixture 3, causing the guide block 13 on the inner wall of the slide 14 to move down and contact the pull rod 10. Under the action of the guide block 13, the pull rod 10 is pushed towards the guide plate 11. Due to the track design of the guide plate 11, the pull rod 10 will slide along the inclined path of the guide plate 11. As the pull rod 10 moves, its top gradually disengages from the slot of the card plate 12. When the pull rod 10 is fully entered into the track of the guide plate 11, the locked state is released.
[0024] It should be noted that after the sealing ring 8 is compressed, there is still compressible space inside, which allows the test fixture 3 to be pressed down a little further, making it easier for the device to unlock and making the operation smoother and safer.
[0025] Working Principle: The NTC temperature sensor 1 is inserted into the test fixture 3. The inner wall of the test fixture 3 has a connection hole 7 that matches the outer wall of the NTC temperature sensor 1, ensuring accurate and stable installation of the NTC temperature sensor 1. Pressing down on the test fixture 3 causes it to press down, simultaneously causing the pull rod 10 to engage with the slot inside the clamping plate 12. During this process, the sealing ring 8 at the bottom of the test fixture 3 is compressed, and its inner wall tightly adheres to the outer wall of the NTC temperature sensor 1, forming a sealed environment to ensure no gas leakage during subsequent testing. The pressure source 5 is activated, and air is injected into the NTC temperature sensor 1 through the air pressure valve 4. The air pressure valve 4 controls the inflation process, gradually increasing the air pressure inside the NTC temperature sensor 1 until a preset pressure value is reached. After reaching the preset pressure, the pressure source 5 maintains that pressure for a period of time. This stage is the pressure holding stage, the purpose of which is to ensure the internal pressure of NTC temperature sensor 1 is stable, providing an accurate data basis for subsequent testing stages. The testing equipment monitors the pressure changes inside NTC temperature sensor 1 in real time through pressure gauge 2 and records the pressure value changes. By comparing the pressure value changes, it is determined whether there is a leak in the sensor. Pressure gauge 2 is installed on the inner wall of the connecting pipe 6 and can accurately reflect the internal pressure state of the sensor. After the test is completed, the air pressure valve 4 releases the internal pressure of NTC temperature sensor 1 to prepare for the next test. The testing equipment displays the test results in real time throughout the process and judges the airtightness of NTC temperature sensor 1 according to the preset parameter range. If the test result meets the preset parameter range, it is judged as qualified for airtightness and the result is displayed as "OK"; if it is not qualified, it is displayed as "NG".
Claims
1. An NTC temperature sensor airtightness testing fixture, comprising an NTC temperature sensor (1) and a testing fixture (3), characterized in that: The test fixture (3) is used to fix and support the NTC temperature sensor (1). A connecting pipe (6) is fixedly connected to the bottom of the test fixture (3). A pressure gauge (2) is fixedly installed on the inner wall of the connecting pipe (6). The pressure gauge (2) is used to monitor and display the pressure value inside the NTC temperature sensor (1). A pressure valve (4) is fixedly installed at the end of the connecting pipe (6). It is used to control the inflation and deflation of the NTC temperature sensor (1). A pressure source (5) is fixedly installed on the side of the pressure valve (4). It is connected to the pressure valve (4) to provide the air pressure required for detection.
2. The NTC temperature sensor airtightness testing fixture as described in claim 1, characterized in that: The pressure valve (4) can control the inflation process, so that the NTC temperature sensor (1) reaches the preset pressure value and maintains the pressure value for a period of time during the pressure holding stage.
3. The NTC temperature sensor airtightness testing fixture as described in claim 2, characterized in that: After the test is completed, the pressure valve (4) can release the pressure inside the NTC temperature sensor (1) to prepare for the next test.
4. The NTC temperature sensor airtightness testing fixture as described in claim 1, characterized in that: The inner wall of the test fixture (3) is provided with a connection hole (7), and the inner wall of the connection hole (7) matches the outer wall size of the NTC temperature sensor (1).
5. The NTC temperature sensor airtightness testing fixture as described in claim 4, characterized in that: The bottom of the test fixture (3) is fixedly connected to a sealing ring (8), and a bottom ring (9) is fixedly installed at the bottom of the sealing ring (8). The inner wall of the sealing ring (8) can be sealed and fitted with the outer wall of the NTC temperature sensor (1) after compression.
6. The NTC temperature sensor airtightness testing fixture as described in claim 5, characterized in that: A pull rod (10) is rotatably mounted on the inner wall of the bottom ring (9), and the top of the pull rod (10) is snapped onto the surface of the test fixture (3).
7. The NTC temperature sensor airtightness testing fixture as described in claim 6, characterized in that: The test fixture (3) has a groove (14) on its surface. A clamping plate (12) is fixedly installed on the inner wall of the groove (14). The top of the clamping plate (12) has a slot for clamping the pull rod (10).
8. The NTC temperature sensor airtightness testing fixture as described in claim 7, characterized in that: A guide plate (11) is fixedly installed on the side wall of the card plate (12), and a guide block (13) is fixedly installed on the top of the inner wall of the slide groove (14).