A double-terminal high-voltage test fixture for conductivity sensors

Abstract

The present application provides a double-end high-pressure test tool for a conductivity sensor, comprising: a cup body, provided with a standard conductivity sensor installation cavity and a conductivity sensor installation cavity to be tested, the two chambers being connected; two sealing end covers, respectively sealed and installed at the two end openings of the cup body, each sealing end cover having a sensor installation slot for circumferentially and axially fixing the sensor; at least one of the two sealing end covers is provided with a liquid injection channel directly connected to an external pressure platform and the conductivity sensor installation cavity. The present application can simulate the high-pressure environment of 10,000 meters deep sea, and test the accuracy, dynamic response performance and other indicators of a seven-electrode conductivity sensor under high pressure. It has a compact size, fast pressure testing, high pressure testing efficiency and low cost. In addition, the pressure testing tool provided by this solution can be used to place a benchmark sensor to maintain synchronous simulation, and the overall tooling structure can be placed in a constant temperature bath for variable temperature testing, with high test accuracy and good reliability.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage testing, and more specifically, to a double-terminal high-voltage testing tool for a conductivity sensor. Background Art

[0002] It's well known that effective deep-sea exploration technology is a crucial way to obtain information about the ocean environment and resources, and seawater salinity is one of the key physical quantities of interest in ocean exploration research. Measuring seawater salinity is of great significance to marine scientific research, ocean development and utilization, and military defense.

[0003] Measuring seawater conductivity is an important means of measuring salinity. Using conductivity sensors to measure salinity has the advantages of high accuracy, fast speed, reliable calculation of seawater density, and ease of on-site measurement. This measurement method has become the main means of measuring seawater salinity.

[0004] The seven-electrode conductivity sensor is a high-precision sensor used for ocean surveys and monitoring, and a major competitor in the international marine high-tech product market. To ensure the conductivity sensor's structural integrity and stable performance in the high-pressure environment of 10,000 meters deep sea, the sensor undergoes multiple tests in a simulated 10,000-meter deep-sea high-pressure environment during its laboratory development phase. These tests examine sensor performance, including accuracy and dynamic response.

[0005] Existing test fixtures that simulate deep-sea high-pressure environments are usually bulky, have low pressure testing efficiency, high pressure testing costs, and are difficult to perform temperature-varying tests on the seawater inside.

[0006] In view of this, a more efficient high-voltage test tool is needed to solve the problems existing in the existing high-voltage test tool during testing. Summary of the Invention

[0007] The present application provides a double-terminal high-voltage test fixture for a conductivity sensor, which can simulate the high-pressure environment of 10,000 meters deep sea, and test the accuracy, dynamic response performance and other indicators of the seven-electrode conductivity sensor under high pressure, as well as temperature-varying tests. The tool is compact, has fast pressure testing speed, high pressure testing efficiency and low cost.

[0008] The present application provides a double-terminal high-voltage test fixture for a conductivity sensor, comprising:

[0009] The cup body is provided with a standard conductivity sensor installation cavity and a conductivity sensor installation cavity to be measured, and the two cavities are communicated;

[0010] a first sealing end cover, sealingly mounted at the first end opening of the cup body, wherein the first sealing end cover is provided with a first sensor mounting slot for circumferentially and axially fixing the standard conductivity sensor;

[0011] A second sealing end cover is sealingly mounted at the second end opening of the cup body, wherein the second sealing end cover is provided with a second sensor mounting slot for circumferentially and axially fixing the conductivity sensor to be measured;

[0012] At least one of the first sealing end cover and the second sealing end cover is provided with a liquid injection channel directly connecting the external pressure platform with the standard conductivity sensor installation cavity, or directly connecting the external pressure platform with the conductivity sensor installation cavity to be measured.

[0013] In some embodiments, the first sensor mounting slot and the second sensor mounting slot are coaxially arranged.

[0014] In some embodiments, the injection channel includes an injection port and an injection pipe connected to the standard conductivity sensor installation cavity or the conductivity sensor to be measured installation cavity.

[0015] In some embodiments, it also includes a process hole that is connected to the injection pipeline and coaxially arranged.

[0016] In some embodiments, it further includes a welding plug welded to the process hole, wherein the length of the welding plug is greater than or equal to 8 mm and the pressure-bearing capacity is greater than or equal to 140 MPa.

[0017] In some embodiments, the first sensor installation slot is provided with a first positioning step on the inner wall of the standard conductivity sensor installation cavity, which can limit the movement of the standard conductivity sensor under the action of hydraulic pressure.

[0018] In some embodiments, the second sensor installation slot is provided with a second positioning step on the inner wall of the installation cavity of the conductivity sensor to be measured, which can limit the movement of the conductivity sensor to be measured under the action of hydraulic pressure.

[0019] In some embodiments, a first sealing ring is provided between the first sealing end cap and the standard conductivity sensor.

[0020] In some embodiments, a second sealing ring is provided between the second sealing end cap and the conductivity sensor to be measured.

[0021] The dual-terminal high-voltage test fixture for conductivity sensors provided in this application can simulate the high-pressure environment of 10,000 meters deep sea, allowing for high-pressure testing of seven-electrode conductivity sensors for accuracy, dynamic response, and other indicators. It is compact, fast, and efficient, and is relatively low-cost. Furthermore, the test fixture can accommodate a reference sensor for synchronized simulation, and the entire fixture structure can be placed in a constant-temperature bath for variable-temperature testing.

[0022] The technical advantages of this application are:

[0023] 1. Simulating the high-pressure environment of 10,000 meters of ocean, it can complete the calibration experiment of conductivity sensors in high-pressure environments. The test is efficient and convenient, and the dynamic performance of the sensor can be tested by rapid voltage change.

[0024] 2. The conductivity tester cup is small in size and easy to process, which can reduce the pressure test cost;

[0025] 3. The first sealing end cover and the second sealing end cover are provided with sensor mounting slots, and the conductivity sensor is mounted in the sensor mounting slots. The installation is firm and reliable, which can ensure the safety of the pressure process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the double-terminal high-voltage test fixture for the conductivity sensor provided in this application;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of the double-terminal high-voltage test fixture for the conductivity sensor provided in this application from another angle;

[0029] Figure 3 A cross-sectional view of a double-terminal high-voltage test fixture for a conductivity sensor provided in this application;

[0030] Among them, 1-cup body, 2-first sealing end cap, 3-second sealing end cap, 4-standard conductivity sensor, 5-tested conductivity sensor, 6-liquid injection port, 7-liquid injection pipe, 8-welding plug, 9-first sealing ring, 10-second sealing ring;

[0031] 21 - first sensor installation slot, 22 - first positioning step, 31 - second sensor installation slot, 32 - second positioning step. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the three-dimensional structure of the double-terminal high-voltage test fixture for the conductivity sensor provided in this application; Figure 2 This is a schematic diagram of the three-dimensional structure of the double-terminal high-voltage test fixture for the conductivity sensor provided in this application from another angle; Figure 3 This is a cross-sectional view of the double-terminal high-voltage test fixture for the conductivity sensor provided in this application.

[0034] This application provides a dual-terminal high-voltage test fixture for conductivity sensors, comprising a cup body 1, internally provided with a chamber capable of accommodating a standard conductivity sensor 4, a conductivity sensor to be tested 5, and a test medium. A first sealing end cap 2 and a second sealing end cap 3 are mounted on the front and rear ends of the cup body 1, respectively. The non-test ends of the standard conductivity sensor 4 and the conductivity sensor to be tested 5 are secured in slots in the first and second sealing end caps 2 and 3, respectively.

[0035] Specifically, the cup body 1 is provided with a standard conductivity sensor mounting cavity and a test conductivity sensor mounting cavity. The two cavities are coaxially arranged along the transverse direction of the cup body 1 and are interconnected. A first sealing end cap 2 is sealedly mounted at the first end opening of the cup body 1. A first sensor mounting slot 21 is provided within the first sealing end cap 2. The standard conductivity sensor 4 is mounted in this first sensor mounting slot 21, which can secure the standard conductivity sensor 4 circumferentially and axially.

[0036] The second sealing end cover 3 is sealed and installed at the second end opening position of the cup body 1. A second sensor mounting slot 31 is provided inside the second sealing end cover 3. The conductivity sensor 5 to be measured is installed in the second sensor mounting slot 31, and the second sensor mounting slot 31 can fix the conductivity sensor to be measured 5 in the circumferential direction and the axial direction.

[0037] At least one of the first sealing end cover 2 and the second sealing end cover 3 is provided with a liquid injection channel, which is directly connected to the external pressure platform and the standard conductivity sensor installation cavity, or directly connected to the external pressure platform and the conductivity sensor installation cavity to be measured.

[0038] Seawater from an external pressure platform enters the cup 1 through a steel pipe via a liquid injection channel. Liquid is injected into the cup 1, achieving a maximum pressure of 140 MPa while simultaneously conducting variable temperature tests. This solution provides a dual-terminal high-pressure test fixture for conductivity sensors, capable of rapidly applying pressure and testing them in a high-pressure environment. This fixture is designed to simulate the operating conditions of conductivity sensors at depths of 10,000 meters.

[0039] During installation, the standard conductivity sensor 4 is inserted into the first sealing end cap 2, the conductivity sensor to be tested is inserted into the second sealing end cap 3, and the first and second sealing end caps 2 and 3 are mounted on the cup body 1 of the conductivity test fixture. Conductivity sensor leads are connected to the acquisition circuit at both ends of the conductivity test fixture cup body 1. The injection port 6 is connected to the pressure platform for pressurization. The entire fixture structure is placed in a constant temperature tank in an oil bath for variable temperature testing. This simulates the high-pressure environment of the 10,000-meter deep sea, and the seven-electrode conductivity sensor is tested for accuracy and dynamic response performance under high pressure. The standard conductivity sensor 4 and the conductivity sensor to be tested 5 are located in the same cavity, ensuring the credibility of the calibration experimental data.

[0040] In order to effectively simulate the high-voltage performance of the standard conductivity sensor 4 and the conductivity sensor to be tested 5 and ensure detection accuracy, the first sensor mounting slot 21 and the second sensor mounting slot 31 should be coaxially arranged.

[0041] The injection channel includes an injection port 6 and an injection pipe 7. The injection port 6 is located on the sealing end cap and extends horizontally. The injection pipe 7 extends vertically and perpendicularly to the injection port 6. The injection pipe 7 connects the injection port 6 with the mounting cavity for a standard conductivity sensor, or connects the injection pipe 7 with the mounting cavity for a conductivity sensor to be tested. Seawater from the external pressure testing platform enters the injection port 6 through a pipe and then enters the injection pipe 7 through the injection port 6, thereby injecting high-pressure medium into the cup body 1. This allows the seven-electrode conductivity sensor to undergo accuracy and dynamic response performance tests under high pressure, as well as variable temperature testing in a constant temperature chamber.

[0042] Preferably, the conductivity tester cup body 1 has a thickness of 11 mm, and the first sealing end cap 2 and the second sealing end cap 3 are assembled with both ends of the conductivity tester cup body 1 in a threaded connection manner.

[0043] To facilitate the machining of the injection pipe 7, a process hole can be provided in the sealing end cap. This process hole is coaxial with and communicates with the injection pipe 7. During machining, the process hole and the injection pipe 7 are machined simultaneously. After machining, the process hole is welded shut to form a welded plug 8. To ensure pressure resistance, the weld depth should be greater than or equal to 8 mm, capable of withstanding test medium pressures of 140 MPa and above.

[0044] In order to prevent the standard conductivity sensor 4 from rushing out of the first sensor mounting slot 21 during the pressing process, a first positioning step 22 can be provided on the inner wall of the first sensor mounting slot 21 located in the standard conductivity sensor mounting cavity. The first positioning step 22 is an inwardly concave positioning surface formed by rotation around the axis, which serves as an axial limit and can prevent the standard conductivity sensor 4 from rushing out of the first sealing end cover 2 under the action of hydraulic pressure, thereby ensuring the safety of the pressing process.

[0045] Furthermore, a second positioning step 32 is provided on the inner wall of the second sensor mounting slot 31 located in the mounting cavity of the conductivity sensor to be measured. The second positioning step 32 has the same structure as the first positioning step 22. The second positioning step 32 can limit the conductivity sensor to be measured 5 from rushing out of the second sealing end cover 3 under the action of hydraulic pressure.

[0046] In order to ensure that the connection between the first sealing end cap 2 and the standard conductivity sensor 4 is well sealed and fixed, a first sealing ring 9 can be provided between the first sealing end cap 2 and the standard conductivity sensor 4. The first sealing ring 9 can seal the installation gap and make the sensor fixation more firm and reliable.

[0047] Furthermore, a second sealing ring 10 can be provided between the second sealing end cap 3 and the conductivity sensor 5 to be measured. The second sealing ring 10 seals the installation gap between the second sealing end cap 3 and the conductivity sensor 5 to be measured, and makes the conductivity sensor 5 to be measured more firmly and reliably fixed.

[0048] The first sealing end cover 2 and the second sealing end cover 3 in this solution can both be nuts, which are fixed to the cup body 1 through threaded connection and are waterproofed by sealing rings.

[0049] The double-terminal high-voltage test fixture for the conductivity sensor provided in the present application has a small size, high pressure testing efficiency, and low pressure testing cost. The overall fixture structure can be placed in a constant temperature bath to realize variable temperature testing.

[0050] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0051] The above is a detailed introduction to the dual-terminal high-voltage test fixture for conductivity sensors provided by this application. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only intended to help understand the method and core concept of this application. It should be noted that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A double-terminal high-voltage test fixture for a conductivity sensor, characterized in that: include: A cup body (1), wherein the cup body (1) is provided with a standard conductivity sensor installation cavity and a conductivity sensor to be measured installation cavity, the two cavities being in communication; A first sealing end cover (2) is sealingly mounted at the first end opening of the cup body (1), wherein a first sensor mounting slot (21) is provided inside the first sealing end cover (2) for fixing the standard conductivity sensor (4) in the circumferential and axial directions; A second sealing end cover (3) is sealingly mounted at the second end opening of the cup body (1); a second sensor mounting slot (31) is provided inside the second sealing end cover (3) for fixing the conductivity sensor (5) to be measured in the circumferential and axial directions; the first sensor mounting slot (21) and the second sensor mounting slot (31) are coaxially arranged; At least one of the first sealing end cover (2) and the second sealing end cover (3) is provided with a liquid injection channel that directly connects the external pressure platform with the standard conductivity sensor installation cavity, or directly connects the external pressure platform with the conductivity sensor installation cavity to be measured.

2. The double-terminal high-voltage test fixture for a conductivity sensor according to claim 1, characterized in that: The injection channel comprises an injection port (6) and an injection pipe (7) communicating with the standard conductivity sensor installation cavity or the conductivity sensor to be measured installation cavity.

3. The double-terminal high-voltage test fixture for a conductivity sensor according to claim 2, characterized in that: It also includes a process hole that is communicated with the liquid injection pipeline (7) and is coaxially arranged.

4. The double-terminal high-voltage test fixture for a conductivity sensor according to claim 3, characterized in that: It also includes a welding plug (8) welded to the process hole, wherein the length of the welding plug (8) is greater than or equal to 8 mm and the pressure bearing capacity is greater than or equal to 140 MPa.

5. The double-terminal high-voltage test fixture for a conductivity sensor according to any one of claims 1 to 4, characterized in that: The first sensor installation slot (21) is provided with a first positioning step (22) on the inner wall of the standard conductivity sensor installation cavity.

6. The double-terminal high-voltage test fixture for a conductivity sensor according to claim 5, characterized in that: The second sensor installation slot (31) is provided with a second positioning step (32) on the inner wall of the installation cavity of the conductivity sensor to be measured.

7. The double-terminal high-voltage test fixture for a conductivity sensor according to claim 1, characterized in that: A first sealing ring (9) is provided between the first sealing end cover (2) and the standard conductivity sensor (4).

8. The double-terminal high-voltage test fixture for a conductivity sensor according to claim 7, characterized in that: A second sealing ring (10) is provided between the second sealing end cover (3) and the conductivity sensor (5) to be measured.

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