Large-scale line-shaped salt water voltage test tooling
By designing structures such as winding columns and transparent baffles, the problem of accurately counting the number of color points in large-scale line pattern testing was solved, achieving high-precision line pattern defect detection and improving the accuracy and efficiency of test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU WELLYUN ELECTRICAL
- Filing Date
- 2025-05-13
- Publication Date
- 2026-06-12
AI Technical Summary
In traditional large-scale wire sample salt water voltage testing, due to the long length of the wire sample, it is impossible to accurately count the number of colorimetric points when the samples are stacked, which affects the test results.
A large-size wire sample salt water voltage testing fixture is designed, which adopts a structure including a winding column, a baffle, and an adjustable power supply to make the wire sample wind in an S-shaped trajectory. The transparent baffle isolates adjacent areas, and the defect points are marked by phenolphthalein colorimetric reaction. The recognition accuracy is improved by optimizing the dynamic electric field distribution and visual masking technology.
It effectively avoids blind spots in the observation of line stacking, reduces color interference, improves the pinhole recognition accuracy of large-size line sample testing to the millimeter level, and supports batch and efficient testing.
Smart Images
Figure CN224354364U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wire-sample saline test fixtures, specifically a large-size wire-sample saline voltage test fixture. Background Technology
[0002] The wire sample salt water voltage test fixture is a specialized device used to evaluate the insulation performance and detect defects of wires (such as enameled wires and cables) in a corrosive salt water environment. Its core function is to apply voltage and monitor changes in electrical parameters by simulating specific working conditions to identify defects such as pinholes and cracks in the insulation layer.
[0003] Traditional salt water voltage testing for large-diameter wire samples (length > 6m) involves immersing the wire samples in a salt water bath. Due to the length of the wires, they tend to pile up during testing. If pinholes appear at the piled-up areas, it becomes impossible to accurately count the number of colored spots, thus affecting the test results for large-diameter wire samples. Therefore, a new technical solution is needed to address this issue. Utility Model Content
[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a large-size wire sample salt water voltage testing fixture to solve the technical problem that when testing large-size wire samples (length > 6m) in salt water, the large-size wire samples are immersed in the salt water tank. Due to the long length of the wire samples, they are piled up during the test. If pinholes appear in the piled-up wire samples, it is impossible to accurately count the number of color spots by visual inspection, which affects the test results of large-size wire samples.
[0005] To achieve the objectives of this utility model, the technical solution adopted is as follows: A large-scale linear salt water voltage testing fixture is designed, comprising:
[0006] The testing mechanism includes a base plate disposed in the test chamber and a connecting seat fixedly connected to one end of the test chamber. An adjustable power supply is installed on the connecting seat. Multiple sets of winding columns are fixedly connected to the surface of the base plate. Each set of winding columns consists of two winding columns. A baffle is fixedly connected between the two winding columns in each set. The thickness of the baffle is less than the diameter of the winding column, and the baffle is located in the middle of the winding column.
[0007] A fixing mechanism is used to fix the two ends of the test line.
[0008] Preferably, the fixing mechanism includes a support plate fixedly connected to one side of the surface of the connecting seat. Two threaded rods are fixedly connected to the surface of the support plate. Pressure plates are slidably sleeved on the outer sides of the two threaded rods. The connection length of the two pressure plates is adapted to the length of the support plate. Nuts are threadedly sleeved on the outer sides of the two threaded rods above the two pressure plates. Arc-shaped grooves are formed on both sides of the surface of the support plate and at the ends of the two pressure plates near the support plate. The arc-shaped grooves on the support plate correspond to the arc-shaped grooves on the pressure plates.
[0009] Preferably, push rod motors are fixedly installed on both sides of the surface of the test groove, and fixed plates are fixedly connected to the telescopic ends of the two push rod motors. Multiple through holes are opened on the bottom plate, and pull rods are fixedly connected to both sides of the surface of the bottom plate. The tops of the two pull rods are respectively fixedly connected to the bottoms of the two fixed plates.
[0010] Preferably, two connecting frames are fixedly connected to one side of the base plate surface, and fixed pulleys are fixedly connected to the inner sides of the two connecting frames.
[0011] Preferably, an anti-slip pad is fixedly connected inside the arc-shaped groove, and the anti-slip pad is made of rubber.
[0012] Preferably, the support plate has insertion holes on both sides of its surface, and the two pressure plates are fixedly connected to insertion rods on both sides of the end closest to the support plate. The insertion rods correspond to the insertion holes, and the external dimensions of the insertion rods are adapted to the internal dimensions of the insertion holes.
[0013] Preferably, the length of the insertion rod is less than the depth of the insertion hole, and a spring is fixedly connected to the bottom end of the inner cavity of the insertion hole.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] This invention combines a winding column, baffle, adjustable power supply, base plate, and test tank to wind large-size wire samples in an S-shaped trajectory around the outside of multiple sets of surface-insulated winding columns. This ensures that the wire samples are evenly distributed in the test tank and completely immersed in the solution, effectively avoiding blind spots caused by wire stacking. The tooling power system uses AC 220V input, which is stepped down to 24V by a transformer and then converted into pulsating DC by a four-diode bridge rectifier circuit. The positive and negative terminals are connected to the conductor in the test tank and the wire sample, respectively. When the wire sample has pinhole defects, the electrolytic reaction causes phenolphthalein to develop color at the defect, forming a red mark. Simultaneously, a transparent baffle isolates adjacent wire sample areas, significantly reducing color interference and further improving the test results of large-size wire samples. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a cross-sectional view of the fixing mechanism of this utility model.
[0018] In the diagram: 1. Test slot; 11. Connecting seat; 12. Adjustable power supply; 13. Base plate; 14. Winding column; 15. Baffle; 2. Connecting frame; 21. Fixed pulley; 3. Support plate; 31. Pressure plate; 32. Anti-slip pad; 33. Threaded rod; 34. Nut; 35. Insertion hole; 36. Spring; 37. Insert rod; 38. Arc groove; 4. Push rod motor; 41. Pull rod; 42. Fixing plate. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0020] Example 1: A large-size wire sample salt water voltage testing fixture, see [link / reference] Figures 1 to 2 The test mechanism includes: a base plate 13 disposed in the test slot 1 and a connecting seat 11 fixedly connected to one end of the test slot 1. An adjustable power supply 12 is installed on the connecting seat 11. Multiple sets of winding columns 14 are fixedly connected to the surface of the base plate 13. Each set of winding columns 14 consists of two winding columns. A baffle 15 is fixedly connected between the two winding columns 14 in each set. The thickness of the baffle 15 is less than the diameter of the winding column 14, and the baffle 15 is located in the middle of the winding column 14. A fixing mechanism is used to fix the two ends of the test line.
[0021] During operation, a sodium chloride solution with a concentration of 0.2% to 0.3% is first injected into test cell 1 as a conductive medium. Then, 3g of phenolphthalein is dissolved in 100ml of ethanol to form an indicator. 20ml of phenolphthalein solution is added precisely for every 10kg of brine and thoroughly mixed to create an electrolytic reaction environment. During testing, large-diameter wire samples are wound in an S-shaped trajectory around the outside of multiple sets of surface-insulated winding pillars 14, ensuring that the wire samples are evenly distributed within the test tank 1 and completely immersed in the solution. This effectively avoids blind spots caused by wire stacking. The tooling power system uses AC 220V input, which is stepped down to 24V by a transformer and then converted into pulsating DC through a four-diode bridge rectifier circuit. The positive and negative terminals are connected to the conductor in the test tank 1 and the wire sample, respectively. When a pinhole defect exists in the wire sample, the electrolytic reaction causes phenolphthalein to develop a red mark at the defect. Simultaneously, a transparent baffle 15 isolates adjacent wire sample areas, significantly reducing color interference. During the test, the leakage current intensity is monitored in real time (threshold set ≤5mA). If the leakage current of a single sample exceeds the standard or the number of color spots in a 30-meter continuous section is ≥5, the insulation of the sample is determined to be faulty. This device improves the pinhole recognition accuracy to the millimeter level through dynamic electric field distribution optimization and visual masking technology, effectively supporting the batch and efficient testing of large-diameter cables and further improving the results of voltage testing of large-diameter wire samples.
[0022] For details, see Figure 1 and Figure 2 The fixing mechanism includes a support plate 3 fixedly connected to one side of the surface of the connecting seat 11. Two threaded rods 33 are fixedly connected to the surface of the support plate 3. Pressure plates 31 are slidably sleeved on the outer sides of the two threaded rods 33. The connection length of the two pressure plates 31 is adapted to the length of the support plate 3. Nuts 34 are threadedly sleeved on the outer sides of the two threaded rods 33 above the two pressure plates 31. Arc-shaped grooves 38 are opened on both sides of the surface of the support plate 3 and at the ends of the two pressure plates 31 near the support plate 3. The arc-shaped grooves 38 on the support plate 3 correspond to the arc-shaped grooves 38 on the pressure plates 31. When testing large-size wire samples, the large-size wire sample is placed in the arc-shaped groove 38. Then, by turning the nut 34, the pressure plate 31 is moved towards the support plate 3, thereby limiting the large-size wire sample and preventing it from entering the test tank 1 and contacting the solution, which would cause errors.
[0023] Further, see Figure 1 Both sides of the surface of the test tank 1 are fixedly installed with push rod motors 4, and the telescopic ends of the two push rod motors 4 are fixedly connected to the fixing plates 42. The bottom plate 13 has multiple through holes, and both sides of the surface of the bottom plate 13 are fixedly connected with pull rods 41. The tops of the two pull rods 41 are respectively fixedly connected to the bottoms of the two fixing plates 42. When testing large-size wire samples, the push rod motors 4 are started to drive the bottom plate 13 to move upward, so that the bottom plate 13 is placed above the solution in the test tank 1. This makes it easier for personnel to wrap the large-size wire sample to be tested in an S-shape around the outside of the winding column 14. After the winding is completed, the push rod motors 4 drive the bottom plate 13 to be placed in the inner cavity of the test tank 1, and the large-size wire sample to be tested is immersed in the solution.
[0024] It is worth noting that, see Figure 1 Two connecting brackets 2 are fixedly connected to one side of the surface of the base plate 13. Fixed pulleys 21 are fixedly connected to the inner side of each of the two connecting brackets 2. When a large-size wire is wound around the outside of the winding column 14, the large-size wire is placed at the bottom of the fixed pulley 21 and then connected to the negative terminal of the adjustable power supply 12. This avoids the large-size wire from lifting off one end and detaching from the solution when it is connected to the negative terminal of the adjustable power supply 12, thus affecting the testing of the large-size wire.
[0025] It is worth noting that, see Figure 2 An anti-slip pad 32 is fixedly connected inside the arc groove 38, and the anti-slip pad 32 is made of rubber. By setting the anti-slip pad 32, not only is the friction between the arc groove 38 and the large-size line pattern improved, thereby improving the stability of the large-size line pattern's positioning, but the arc groove 38 is also prevented from directly contacting the large-size line pattern, thus avoiding wear on the large-size line pattern.
[0026] It is worth mentioning that, see Figure 2 The support plate 3 has insertion holes 35 on both sides of its surface. Two pressure plates 31 are fixedly connected to insertion rods 37 on both sides near the support plate 3. The insertion rods 37 correspond to the insertion holes 35, and their external dimensions match the internal dimensions of the insertion holes 35. The length of the insertion rods 37 is less than the depth of the insertion holes 35. A spring 36 is fixedly connected to the bottom of the inner cavity of the insertion hole 35. When limiting the movement of a large-sized wire pattern, the insertion rods 37 are inserted into the insertion holes 35, guiding the movement of the pressure plates 31 and improving the stability of the connection between the pressure plates 31 and the support plate 3. This further enhances the stability of limiting the large-sized wire pattern. When the pressure plates 31 cooperate with the support plate 3 to limit the movement of the large-sized wire pattern, the insertion rods 37 compress the spring 36 inside the insertion holes 35. When disassembling the large-sized wire pattern, the nut 34 is loosened, and the spring force of the spring 36 pushes the pressure plates 31 to move upwards automatically, facilitating the disassembly of the large-sized wire pattern.
[0027] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.
[0028] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.
Claims
1. A large-size linear sample salt water voltage testing fixture, characterized in that, include: The testing mechanism includes a base plate (13) disposed in the test slot (1) and a connecting seat (11) fixedly connected to one end of the test slot (1). An adjustable power supply (12) is installed on the connecting seat (11). Multiple sets of winding columns (14) are fixedly connected to the surface of the base plate (13). Each set of winding columns (14) consists of two columns. A baffle (15) is fixedly connected between the two winding columns (14) in each set. The thickness of the baffle (15) is less than the diameter of the winding column (14). The baffle (15) is placed in the middle of the winding column (14). A fixing mechanism is used to fix the two ends of the test line.
2. The large-size wire sample salt water voltage testing fixture as described in claim 1, characterized in that, The fixing mechanism includes a support plate (3) fixedly connected to one side of the surface of the connecting seat (11). Two threaded rods (33) are fixedly connected to the surface of the support plate (3). Pressure plates (31) are slidably sleeved on the outer side of the two threaded rods (33). The connection length of the two pressure plates (31) is adapted to the length of the support plate (3). Nuts (34) are threadedly sleeved on the outer side of the two threaded rods (33) above the two pressure plates (31). Arc grooves (38) are opened on both sides of the surface of the support plate (3) and at one end of the two pressure plates (31) near the support plate (3). The arc grooves (38) on the support plate (3) correspond to the arc grooves (38) on the pressure plates (31).
3. The large-size wire sample salt water voltage testing fixture as described in claim 1, characterized in that, Push rod motors (4) are fixedly installed on both sides of the surface of the test slot (1). The telescopic ends of the two push rod motors (4) are fixedly connected to the fixing plates (42). Multiple through holes are opened on the bottom plate (13). Pull rods (41) are fixedly connected on both sides of the surface of the bottom plate (13). The tops of the two pull rods (41) are fixedly connected to the bottoms of the two fixing plates (42) respectively.
4. The large-size wire sample salt water voltage testing fixture as described in claim 1, characterized in that, Two connecting frames (2) are fixedly connected to one side of the surface of the base plate (13), and fixed pulleys (21) are fixedly connected to the inner side of each of the two connecting frames (2).
5. The large-size wire sample salt water voltage testing fixture as described in claim 2, characterized in that, An anti-slip pad (32) is fixedly connected inside the arc-shaped groove (38), and the anti-slip pad (32) is made of rubber.
6. The large-size linear sample salt water voltage testing fixture as described in claim 2, characterized in that, The support plate (3) has insertion holes (35) on both sides of its surface. The two pressure plates (31) are fixedly connected to insertion rods (37) on both sides of the end near the support plate (3). The insertion rods (37) correspond to the insertion holes (35), and the external dimensions of the insertion rods (37) are adapted to the internal dimensions of the insertion holes (35).
7. The large-size wire sample salt water voltage testing fixture as described in claim 6, characterized in that, The length of the insertion rod (37) is less than the depth of the insertion hole (35), and a spring (36) is fixedly connected to the bottom of the inner cavity of the insertion hole (35).