A power cable water penetration detection device

Abstract

This invention belongs to the field of cable permeability detection technology, specifically a power cable permeability detection device. It includes a test chamber; two opposing circular plates are arranged inside the test chamber; horizontal plates are fixed to the upper and lower sides of both circular plates; two test mechanisms are arranged between the two horizontal plates; each test mechanism includes a test chamber; a C-shaped circular groove is opened on the opposite side of each test chamber; a rotating roller rotates within the C-shaped circular groove; a water flow component is provided in the middle of the rotating roller; multiple partition groups are provided on the rotating roller, and each partition group includes two partitions; two opposing sealing plates are arranged between the test chambers; a semi-circular groove is opened on the opposite side of the two sealing plates, and the cable passes between the two semi-circular grooves; the sealing plates are driven by a drive mechanism. This invention, by setting up the test mechanisms, can simulate the real working condition of groundwater flow driving soil particles to scour the cable sheath, effectively detecting the permeability risk of the cable sheath under dynamic water flow impact.

Description

Technical Field

[0001] This invention belongs to the field of cable water permeability detection technology, specifically a power cable water permeability detection device. Background Technology

[0002] In recent years, with the advancement of materials science, a series of high-performance new materials (such as flexible silicone rubber, high-strength fluoroplastics, composite polymers, and carbon fiber reinforced composites) have been widely used in the preparation of cable sheaths, insulation layers, and joint sealing structures. These new material cables, with their advantages of lightweight, resistance to high and low temperatures, aging resistance, and good flexibility, have been widely adopted in fields such as underground pipeline renovation, deep-sea energy transmission, and extreme environment engineering. Although the application of new materials has significantly improved the overall performance of cables, their waterproof sealing performance remains uncertain due to factors such as material formulation optimization, molding process stability, and structural design complexity. Especially when used in humid environments such as direct underground burial, the sheath integrity and joint sealing reliability of new material cables still need to be verified through rigorous water permeability testing. Therefore, water permeability testing of new material cables has become a necessary step to ensure the safety of these products in engineering applications.

[0003] Currently, the mainstream cable water penetration testing methods in the industry are mainly divided into two categories: immersion testing and hydrostatic pressure testing. Both methods are based on the core idea of ​​simulating water intrusion environment and are suitable for cable testing in different scenarios.

[0004] While immersion testing and hydrostatic pressure testing have played important roles in existing cable quality control, their limitations are becoming increasingly apparent as the application of directly buried cables expands, especially with the increase in engineering projects under complex geological conditions. The most prominent issue is their inability to simulate the permeability of cables in different underground soil environments under the impact of groundwater flow. In practical engineering scenarios, directly buried cables need to adapt to diverse soil media. Different types of soil, such as cohesive soil, sandy soil, and gravelly soil, have significantly different densities and porosities, which can exert varying degrees of compressive stress on the cable sheath. Simultaneously, the groundwater level is not constant, and the flow of groundwater continuously impacts the cable surface. This dynamic impact can not only exacerbate existing minor defects in the sheath but also create directional water flow through soil pores, accelerating water penetration into the cable's interior. Existing immersion testing methods can only simulate static water environments and cannot replicate the dynamic impact effects brought about by groundwater flow. Although hydrostatic pressure testing methods can simulate high-pressure environments, the testing environment is a uniform water medium, which fails to consider the influence of the physical properties of different soil media on the stress state of the cable, and cannot reproduce the complex seepage conditions under the combined action of groundwater flow and soil particles.

[0005] This disconnect between the testing environment and the actual service environment makes it difficult for existing test results to accurately reflect the permeability performance of cables in complex underground environments. For example, some flexible cables made with new materials exhibit good waterproof performance in laboratory static immersion or hydrostatic pressure tests. However, in underground sandy soil environments, the sheath is easily damaged by the scouring and impact of soil particles carried by groundwater flow, leading to permeability failure. Furthermore, the sealing structure of the sheath and joints of new material cables may exhibit differences in elastic modulus, fatigue strength, and other characteristics under dynamic water flow impact compared to static environments, resulting in decreased sealing performance. Existing testing methods cannot detect these potential risks in advance. This mismatch between testing and practical application can not only lead to discrepancies between qualified test results and actual permeability failures in service, but also potentially expose some cables using new materials to safety hazards due to a lack of targeted testing, affecting the long-term stable operation of underground power and communication networks. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the above-mentioned technical problems, this invention proposes a power cable water permeability detection device. By setting up a testing mechanism, it can simulate the real working condition of groundwater flow driving soil particles to scour the cable sheath, effectively detecting the water permeability risk of the cable sheath under dynamic water flow impact; the specific structure is as follows. A power cable water permeability testing device includes a test box; the test box contains two opposing circular plates; Both circular plates have a through pipe installed on their opposite sides, and the through pipe passes through the test box; both circular plates have a horizontal plate fixed to their upper and lower sides. A first motor is installed on each of the opposite sides of the cross plate; a lead screw is installed on the first motor; the lead screw thread engages inside the screw barrel; Two testing mechanisms are provided between the two horizontal plates, and the testing mechanisms are mirrored and spaced apart; each testing mechanism includes a testing chamber, and the top of the testing chamber is fixedly connected to the screw cylinder. The test chamber has a C-shaped groove on one side of the test chamber, and the two sides of the C-shaped groove do not penetrate the test chamber; a rotating roller rotates inside the C-shaped groove, and the two sides of the rotating roller penetrate the test chamber and are flush with the two ends of the test chamber; the openings of the two C-shaped grooves are opposite each other. The rotating roller extends to the outer ring surface on both sides of the test chamber and has a first toothed groove; a first gear rotates above the first toothed groove and rotates inside the test chamber and meshes with the first toothed groove; the first gear is driven by a second motor and the second motor is installed in the inner wall of the test chamber. A water flow assembly is provided in the middle of the rotating roller; The rotating roller is provided with multiple partition groups, and each partition group includes two partitions, which are parallel to each other; the rotating roller is provided with a slide rail, and the partitions slide in the slide rail and are connected with springs; each partition group contains soil from different environments. Two opposing sealing plates are provided between the test chambers, and the upper and lower sides of the sealing plates are in contact with the test chambers on the upper and lower sides; the top and bottom of the sealing plates are provided with arc surfaces, and the diameter of the arc surfaces is the same as the diameter of the partition when it is rotated in the initial state. The two sealing plates have semi-circular grooves on opposite sides, and the cable passes between the two semi-circular grooves; the sealing plates are driven by a drive mechanism.

[0007] In a preferred embodiment of the present invention, each of the partitions has an extension plate that slides within it, and the extension plate is connected to a spring on one side of the partition that slides within it. The extension plate is fixed to the opposite side with an arc plate.

[0008] In a preferred embodiment of the present invention, the opposite sides of the two sealing plates are conical; The driving mechanism includes a driving rod; the driving rod passes through the inside of the sealing plate and extends to the opposite side of the two circular plates; an elongated groove is provided on the circular plate, and the driving rod slides in the elongated groove; The drive rod has sliders rotating on both sides; the drive rod has second gears fixed on both sides, and the second gears are in contact with the sliders; the circular plate has side plates fixed on both sides; electric push rods are installed on the side plates, and the extension rods of the electric push rods are fixed on the sliders; A third motor is fixed on the side plate; a third gear rotates on the output shaft of the third motor, and the third gear is opposite to the second gear.

[0009] In a preferred embodiment of the present invention, the water flow assembly includes a water pipe; the water pipe is rotatably mounted in the middle of the two rotating rollers; one side of the water pipe inside the rotating rollers is blocked. The water pipe is provided with a water outlet; each of the partition groups has a liquid tank on the side facing the water pipe, and the liquid tank has a liquid outlet, which is initially connected to the liquid tank. The liquid tank has evenly arranged vertical grooves on the side facing the extension plate, and the vertical grooves are located between two partition plates. The water pipe extends to the opposite side of the circular plate on both sides; a rectangular groove is provided on the circular plate; a sliding plate slides in the rectangular groove, and the water pipe passes through the sliding plate and is rotatably connected to the sliding plate. When the water pipe moves up and down, it will drive the sliding plate to move up and down along the rectangular groove. The water pipe extends to one side of the slide plate and has a second toothed groove; a fourth motor is fixed on the slide plate; a fourth gear is fixed on the output shaft of the fourth motor and the fourth gear meshes with the second toothed groove.

[0010] In a preferred embodiment of the present invention, a pressure plate is provided between the two partitions of each partition group; the pressure plate has uniformly arranged through holes; and a filter layer is fixed on the pressure plate of the lower rotating roller. Each pressure plate is fixed with a uniformly arranged sliding tube, and the sliding tube slides inside the rotating roller; a driven gear rotates between the sliding tube and the partition plate, and the driven gear rotates inside the rotating roller; Both the partition and the slide tube have a third tooth groove on the side facing the driven gear, and the third tooth groove meshes with the driven gear.

[0011] In a preferred embodiment of the present invention, the pressure plate has uniformly arranged liquid cavities inside, and the liquid cavities are located between adjacent through holes. All the sliding tubes are connected to the liquid chamber; a guide tube slides inside one of the sliding tubes and extends to the left side of the water pipe; a through groove is opened at the top of the other sliding tube and the through groove passes through the rotating roller.

[0012] In a preferred embodiment of the present invention, a uniformly arranged conical plate is fixed on the side of the pressure plate away from the rotating roller, and the conical plate is made of a heat-conducting metal material.

[0013] In a preferred embodiment of the present invention, the through-tube rotates on the test chamber; The passage pipe has a fourth toothed groove; a fifth motor is installed below the passage pipe; and a fifth gear is installed on the fifth motor.

[0014] In a preferred embodiment of the present invention, the test chamber is provided with a door on its side, and the side of the door located inside the test chamber is curved. The door is bolted to the test box.

[0015] The beneficial effects of this invention are as follows: 1. The power cable permeability testing device of the present invention pre-stores different types of soil, such as cohesive soil, sandy soil, and gravelly soil, in the partition group of the rotating roller, and uses different soils to test the cable, thereby simulating the diverse soil medium environment of underground direct-buried cables as much as possible. Especially for cables made of new materials such as flexible silicone rubber and fluoroplastics, it can effectively test the sealing reliability of its sheath under the friction and compression of different soil particles. At the same time, it directionally flows water into the soil in the test area to form a dynamic water flow from top to bottom, accurately simulating the continuous impact of groundwater level changes and groundwater flow on the cable sheath. Compared with the existing static immersion test method without water flow impact and the uniform high-pressure static water of the hydrostatic pressure test method, this test method can reproduce the real working condition of groundwater flow driving soil particles to scour the cable sheath, and effectively detect the water permeability risk of the cable sheath under the impact of dynamic water flow.

[0016] The present invention discloses a power cable water permeability detection device. A first motor drives a lead screw to rotate, causing test boxes to move closer together. This allows for flexible adjustment of the soil pressure on both sides of the cable, accurately simulating the soil compaction stress experienced by the cable at different burial depths. Simultaneously, it can detect the propagation speed and water permeability rate of minute defects in the cable sheath under high-pressure soil stress. It can effectively assess the sealing performance of the cable under the combined effects of soil pressure and water flow impact, avoiding water permeability hazards caused by sheath deformation and seal failure due to deep burial pressure.

[0017] The power cable permeability detection device of this invention conducts heat to the pressure plate and cone plate when water passes through the liquid chamber, thereby exchanging heat with the soil and changing its temperature. This simulates the state of the cable under different soil temperatures. At the same time, by changing the water source with different temperatures, the temperature control parameters can be flexibly switched. It can simulate a single constant temperature condition, or simulate temperature-changing scenarios such as day-night temperature difference and seasonal changes by continuously switching the water source temperature. It accurately replicates the soil temperature environment of different regions such as high-latitude permafrost areas, tropical high-temperature areas, and temperate seasonal change areas, providing a real environmental basis for the permeability detection of cables under diverse temperature conditions. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is an overall diagram of the detection device of the present invention; Figure 2 This is the present invention. Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This is a structural diagram of the circular plate and the testing mechanism in this invention; Figure 4 This is an exploded view of the circular plate and the testing mechanism in this invention; Figure 5 This is the present invention. Figure 4 Enlarged view of a section at point B in the middle; Figure 6 This is a schematic diagram of the cooperation between the sealing plate and the driving mechanism in this invention; Figure 7 This is a diagram of the internal structure of the test chamber in this invention; Figure 8 This is the present invention. Figure 7 Enlarged view of a section at point C; Figure 9 This is a top view of the detection device of the present invention; Figure 10 This is the present invention. Figure 9 Cross-sectional view of the DD section of the testing device before testing; Figure 11 This is the present invention. Figure 10Enlarged view of a section at point E in the middle; Figure 12 This is the present invention. Figure 9 Cross-sectional view of the DD section during testing using the testing device; Figure 13 This is the present invention. Figure 12 Enlarged view of a section at point F.

[0020] In the diagram: 1. Test chamber; 11. Circular plate; 12. Through pipe; 121. Fourth toothed groove; 122. Fifth gear; 13. Horizontal plate; 14. Lead screw; 15. Screw barrel; 2. Test chamber; 21. C-shaped circular groove; 22. Rotating roller; 23. First toothed groove; 24. First gear; 25. Chamber door; 3. Partition plate; 31. Slide rail; 32. Extension plate; 33. Arc plate; 4. Sealing plate; 41. Semicircular groove; 42. Drive rod; 43. 44. Oblong groove; 45. Slider; 46. Second gear; 47. Electric actuator; 48. Third gear; 5. Water pipe; 51. Water outlet; 52. Liquid tank; 53. Liquid inlet; 54. Vertical groove; 55. Rectangular groove; 56. Slide plate; 57. Second tooth groove; 58. Fourth gear; 6. Pressure plate; 61. Through hole; 62. Sliding tube; 63. Driven gear; 64. Third tooth groove; 65. Guide tube; 66. Through groove; 67. Conical plate. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 13 As shown, the power cable water permeability detection device of the present invention, as an embodiment of the present invention, includes a test box 1; the test box 1 is provided with two opposing circular plates 11; A through pipe 12 is installed on the opposite side of each of the two circular plates 11, and the through pipe 12 passes through the test box 1; a horizontal plate 13 is fixed on both the upper and lower sides of the two circular plates 11. A first motor is installed on each of the opposite sides of the horizontal plate 13; a lead screw 14 is installed on the first motor; the lead screw 14 is threaded into the screw barrel 15; Two testing mechanisms are provided between the two horizontal plates 13, and the testing mechanisms are mirror images of each other with a gap between them; the testing mechanism includes a testing chamber 2, and the top of the testing chamber 2 is fixedly connected to the screw cylinder 15; The test chamber 2 has a C-shaped groove 21 on one side, and the two sides of the C-shaped groove do not penetrate the test chamber 2; a rotating roller 22 rotates inside the C-shaped groove 21, and the two sides of the rotating roller 22 penetrate the test chamber 2 and are flush with the two ends of the test chamber 2; the openings of the two C-shaped grooves 21 are opposite each other. The rotating roller 22 extends to the outer ring surface on both sides of the test chamber 2 and has a first toothed groove 23. A first gear 24 rotates above the first toothed groove 23 and rotates inside the test chamber 2 and meshes with the first toothed groove 23. The first gear 24 is driven by a second motor and the second motor is installed in the inner wall of the test chamber 2. A water flow assembly is provided in the middle of the rotating roller 22; The rotating roller 22 is provided with multiple partition groups, and each partition group includes two partitions 3, which are parallel to each other; the rotating roller 22 is provided with a slide rail 31, and the partitions 3 slide in the slide rail 31 and are connected with springs; each partition group contains soil from different environments. Two opposing sealing plates 4 are provided between the test chambers 2, and the upper and lower sides of the sealing plates 4 are in contact with the test chambers 2 on the upper and lower sides; the top and bottom of the sealing plates 4 are provided with arc surfaces, and the diameter of the arc surfaces is the same as the diameter of the partition 3 when it is rotated in the initial state. The two sealing plates 4 have semi-circular grooves 41 on opposite sides, and the cable passes between the two semi-circular grooves 41; the sealing plates 4 are driven by a drive mechanism.

[0023] When testing the cable, firstly, a cable segment is cut and both ends are sealed. Then, the cable is inserted into the conduit 12 on one side. The inserted cable first passes through two semi-circular grooves 41 on one side of the two relatively fitted sealing plates 4. The cable then moves along the two semi-circular grooves 41. After exiting from the other side of the sealing plate 4, the cable passes through the conduit 12 on the other side, and then the cable can be tested. During cable laying, due to different soil environments and different soil media in different regions (such as cohesive soil, sandy soil, gravelly soil, etc.), different types of soil are stored between the two partitions 3 of each partition group. When the cable needs to be molded... When simulating permeability under different soil conditions, different partition groups can be rotated according to the soil to be simulated; that is, the second motor is controlled to rotate, and the rotating second motor will drive the first gear 24 to rotate. The first gear 24 meshes with the first tooth groove 23 on the outer ring of the rotating roller 22, thereby driving the entire rotating roller 22 and multiple partition groups and the soil between them to rotate along the C-shaped circular groove 21. Since the sealing plate 4 has arc surfaces on both the upper and lower sides, the rotating partition group and the soil will rotate along the arc surface of the sealing plate 4. When the soil to be simulated rotates to the upper and lower sides of the sealing plate 4, the rotating roller 22 is controlled to stop rotating. At this time, the soil to be simulated will be located on the upper and lower sides of the sealing plate 4, and then the cable can be tested. Specifically, when testing the cable, the two sealing plates 4 are controlled to move away from each other by the drive mechanism. After the sealing plates 4 move away from each other, the partition groups located on the upper and lower sides of the cable will be connected to each other, and the soil stored in the partition group will be located on the upper and lower sides of the cable. At this time, the scenario of the cable being laid in the soil can be simulated. At the same time, the water flow component is controlled to work, and the water flow component will pass water into the soil. The water will flow down from the soil in the upper partition group and flow out from the lower partition group, thereby simulating the permeability state of the cable when it is laid underground and subjected to the impact of groundwater flow. At the same time, by controlling different amounts of water to enter the soil, the situation of different groundwater level changes can be simulated. More specifically, in the scenario of simulating a cable being laid in the soil, two first motors can be controlled to drive the lead screw 14 to rotate. The rotating lead screw 14 will push the two screw cylinders 15 closer together, thereby causing the test box 1 and the rotating roller 22 inside the test box 1 to move closer together. The moving roller 22 will cause the partition group to move closer together, and at the same time, it will squeeze the soil located on the upper and lower sides of the cable. When the soil on the upper and lower sides of the cable is squeezed, it will be squeezed towards the cable side, thereby changing the pressure of the cable on the soil. This can simulate the state of the cable being buried at different soil depths and subjected to different soil pressures. When the relative partition groups are in contact and the test box 1 is controlled to continue to move closer, the partition 3 will gradually slide into the slide 31, thus not hindering the continued squeezing of the soil. Furthermore, after the cable simulation is completed, the cable is pulled out between the two test boxes 1 and the inside of the cable is checked for water leakage; at the same time, when it is necessary to test the permeability of the cable in other soil environments, the rotating roller 22 is controlled to rotate, thereby driving the partition group containing different soils to rotate to the upper and lower sides of the sealing plate 4. Furthermore, by pre-storing different types of soil, such as cohesive soil, sandy soil, and gravelly soil, within the partition group of the rotating roller 22, and using these different soils to test the cable, the diverse soil medium environment of directly buried underground cables can be simulated as much as possible. Especially for cables made of new materials such as flexible silicone rubber and fluoroplastics, the sealing reliability of their sheaths under the friction and compression of different soil particles can be effectively tested. At the same time, water is directed into the soil in the test area to form a dynamic water flow from top to bottom, accurately simulating the continuous impact of groundwater level changes and groundwater flow on the cable sheath. Compared with the existing static immersion test method without water flow impact and the uniform high-pressure static water of the hydrostatic pressure test method, this test method can reproduce the real working condition of groundwater flow driving soil particles to scour the cable sheath, effectively detecting the risk of water permeation of the cable sheath under dynamic water flow impact. Simultaneously, the first motor drives the lead screw 14 to rotate, causing the test box 1 to move closer together. This allows for flexible adjustment of the soil compression pressure on both sides of the cable, accurately simulating the soil compaction stress experienced by the cable at different burial depths. It can also detect the propagation speed and water permeability rate of minute defects in the cable sheath under high-pressure soil stress. This effectively evaluates the sealing performance of the cable under the combined action of soil pressure and water flow impact, avoiding water permeation hazards caused by sheath deformation and seal failure due to deep burial pressure.

[0024] As an embodiment of the present invention; each of the partitions 3 has an extension plate 32 that slides within it, and a spring is connected to one side of the extension plate 3 that slides within the partition 3; The extension plate 32 is fixed to the opposite side with an arc plate 33. In this embodiment, the opposite sides of the two sealing plates 4 are conical; The driving mechanism includes a driving rod 42; the driving rod 42 passes through the inside of the sealing plate 4 and extends to the opposite side of the two circular plates 11; the circular plates 11 are provided with an elongated oval groove 43, and the driving rod 42 slides in the elongated oval groove 43; The drive rod 42 has sliders 44 rotating on both sides; the drive rod 42 has second gears 45 fixed on both sides, and the second gears 45 are in contact with the sliders 44; the circular plate 11 has side plates fixed on both sides; the side plates are equipped with electric push rods 46, and the extension rods of the electric push rods 46 are fixed on the sliders 44. A third motor is fixed on the side plate; a third gear 47 rotates on the output shaft of the third motor, and the third gear 47 is opposite to the second gear 45.

[0025] Since the extension plate 32 slides inside the partition 3 via a spring, when the partition assembly rotates to the upper and lower sides of the sealing plate 4, the extension plate 32 will fit against the surface of the sealing plate 4; when it is necessary to control the two sealing plates 4 to move away from each other, the control electric push rod 46 retracts, the retracted electric push rod 46 will drive the slider 44 to move away from each other, the slider 44 will drive the drive rod 42 to slide in the elongated groove, and at the same time the drive rod 42 will drive the two sealing plates 4 to move away from each other. When the electric push rod 46 retracts to the limit position, the two sealing plates 4 will move away from each other, and the second gear 45 and the third gear 47 that are in contact with the slider 44 will mesh. Specifically, as the sealing plates 4 move away from each other, the sealing plates 4 will move along the extension plate 32, and the extension plate 32 will remain in contact with the arc surface of the sealing plates 4 under the action of the spring. When the sealing plates 4 move away from each other and are separated from the extension plate 32, the extension plate 32 will extend out from the partition plate 3 under the action of the spring, and the upper and lower extension plates 32 will fit together, thereby limiting the soil and cable between the two partition plates 3. When the soil inside the partition plate 3 is squeezed, the extension plate 32 will be pressed into the partition plate 3, thereby adapting to the distance between the upper and lower partition plates 3. More specifically, after the cable inspection is completed and the cable is pulled out from between the partitions 3, the third motor is controlled to drive the third gear 47 to rotate. Since the third gear 47 is meshed with the second gear 45 at this time, it will drive the second gear 45 to rotate. The rotating second gear 45 will drive the drive rod 42 and the sealing plate 4 to rotate. When the sealing plate 4 rotates 180 degrees, the cones on the opposite sides of the sealing plate 4 will correspond to each other. Then, the first electric push rod 46 is controlled to extend. The extended electric push rod 46 will drive the two sealing plates 4 to move closer to each other through the slider 44 and the drive rod 42. The sealing plates 4 that are moving closer to each other will gradually move to the side of the extension plate 32 that is in contact with each other. Since the arc plate 33 is fixed on the extension plate 32, the cone side of the sealing plate 4 will extend... The soil is inserted between two arc plates 33 and then between two sealing plates 4. When the conical sides of the two sealing plates 4 are in contact with each other, the soil inside the sealing plates 4 is divided to the upper and lower sides of the sealing plates 4. Then, the rotating roller 22 is controlled to drive the partition plate 3 and the extension plate 32 to rotate. The extension plate 32 will rotate along the contour of the surface of the sealing plate 4, so that the soil can be transferred into the C-shaped groove 21. When the part between the two partition plates rotates to the opening position of the C-shaped groove 21, the soil is confined inside the C-shaped groove 21. Then, the sealing plate 4 is controlled to repeat the above operation and rotate 180 degrees so that the side of the sealing plate 4 with the semi-circular groove 41 is in contact between the two test boxes 1. Then, other cables can be tested.

[0026] As one embodiment of the present invention; the water flow assembly includes a water pipe 5; the water pipe 5 rotates in the middle of the two rotating rollers 22; one side of the water pipe 5 inside the rotating rollers 22 is blocked; The water pipe 5 is provided with a water outlet 51; each of the partition groups is provided with a liquid tank 52 on the side facing the water pipe 5, and a liquid outlet 53 is provided on the liquid tank 52. In the initial state, the liquid outlet 53 is connected to the liquid tank 52. The liquid tank 52 has evenly arranged vertical grooves 54 on the side facing the extension plate 32, and the vertical grooves 54 are located between the two partition plates 3. The water pipe 5 extends to the opposite side of the circular plate 11 on both sides; a rectangular groove 55 is provided on the circular plate 11; a sliding plate 56 slides in the rectangular groove 55, and the water pipe 5 passes through the sliding plate 56 and is rotatably connected to the sliding plate 56. When the water pipe 5 moves up and down, it will drive the sliding plate 56 to move up and down along the rectangular groove 55. The water pipe 5 extends to one side of the slide plate 56 and has a second toothed groove 57; a fourth motor is fixed on the slide plate 56; a fourth gear 58 is fixed on the output shaft of the fourth motor and the fourth gear 58 meshes with the second toothed groove 57. In this embodiment, a pressure plate 6 is provided between the two partitions 3 of each partition group; the pressure plate 6 has uniformly arranged through holes 61; a filter layer is fixed on the pressure plate 6 of the lower rotating roller 22; The pressure plate 6 is fixed with evenly arranged sliding tubes 62, and the sliding tubes 62 slide within the rotating roller 22; a driven gear 63 rotates between the sliding tube 62 and the partition plate 3, and the driven gear 63 rotates within the rotating roller 22. The partition plate 3 and the slide tube 62 are both provided with a third tooth groove 64 on the side facing the driven gear 63, and the third tooth groove 64 meshes with the driven gear 63. In this embodiment, the pressure plate 6 has uniformly arranged liquid cavities inside, and the liquid cavities are located between adjacent through holes 61. All the sliding tubes 62 are connected to the liquid cavity; a guide tube 65 slides inside one of the sliding tubes 62 and the guide tube 65 extends to the left side of the water pipe 5; a through groove 66 is opened at the top of the other sliding tube 62 and the through groove 66 passes through the rotating roller 22. In this embodiment, a uniformly arranged conical plate 67 is fixed on the side of the pressure plate 6 away from the rotating roller 22, and the conical plate 67 is made of a heat-conducting metal material.

[0027] When conducting a groundwater flow impact test on the soil, the unsealed side of the water pipe 5 is connected to an external water source. Water entering the water pipe 5 will enter the liquid tank 52 through the outlet pipe 5 and the liquid outlet 53. The water entering the liquid tank 52 will flow downward through multiple vertical grooves 54 and flow into the soil located in the upper partition group. Subsequently, the soil will flow downward and impact the cable, thereby simulating the scenario when the cable is impacted by groundwater. The downward flowing water will flow into the liquid tank 52 through the vertical grooves 54 of the lower rotating roller 22, and then flow out from the lower water pipe 5. Specifically, when the test box 1 drives the rotating roller 22 and the partition group to approach each other, if the upper and lower opposing partitions 3 are squeezed and move away from each other, they will gradually slide into the slide rail 31 and compress the spring. Since the partitions 3 and the slide tube 62 are provided with a third tooth groove 64, when the partitions 3 slide into the slide rail 31, they will push the driven gear 63 to rotate. The rotating driven gear 63 will drive the slide tube 62 to move towards the cable side, and at the same time push the pressure plate 6 to move towards the cable side. The moving pressure plate 6 will squeeze the soil while the rotating roller 22 approaches and squeezes the soil, thereby increasing the range of soil pressure on the cable, thus simulating the state of the cable under different soil pressures. More specifically, since the pressure plate 6 has evenly arranged through holes 61, when water flows down from the vertical groove 54 in the upper roller 22, it will fall onto the pressure plate 6, and then flow downward through the through holes 61, gradually passing through the soil. Since the pressure plate 6 of the lower roller 22 is fixed with a filter layer, when water passes through the soil, it will first pass through the filter layer on the lower pressure plate 6, then through the through holes 61 on the lower pressure plate 6, and then through the vertical groove 54 on the lower roller 22 into the liquid tank 52 of the lower roller 22, and then be discharged through the lower water pipe 5. In this process, the filter layer can be used to filter the flowing water, preventing soil from entering the through holes 61 and the vertical groove 54. Furthermore, when it is necessary to simulate the state of the cable under different soil temperatures, the fourth motor on the control slide 56 drives the fourth gear 58 to rotate. Since the fourth gear 58 meshes with the second tooth groove 57, it will drive the water pipe 5 inside the rotating roller 22 to rotate. The rotating water pipe 5 will drive the outlet 51 to rotate. When the outlet 51 on the water pipe 5 moves to the side of the guide tube 65, the outlet 51 will be connected to the guide tube 65 and will no longer be connected to the liquid outlet 53. Then, the water pipe 5 is connected to the external water source, and water of different temperatures is introduced into the water pipe 5. When water of different temperatures is introduced into the water pipe 5, the water in the water pipe 5 will enter the guide tube 65. The water entering the guide tube 65 will flow into one of the slide tubes 62. Then, the water of different temperatures will enter the liquid cavity opened inside the pressure plate 6. The water gradually fills the liquid cavity, and once it is full, it flows into another slide. The water then enters the through-channel 66 and flows out for recycling. As the water passes through the liquid cavity, it conducts heat to the pressure plate 6 and the cone plate 67, thus exchanging heat with the soil and changing its temperature. This simulates the state of the cable under different soil temperatures. Simultaneously, by changing the water source to different temperatures, the temperature control parameters can be flexibly switched. This allows for the simulation of both single constant temperature conditions and variable temperature scenarios such as day-night temperature differences and seasonal changes. It accurately replicates the soil temperature environments of different regions, including high-latitude permafrost areas, tropical high-temperature areas, and temperate seasonal change areas, providing a realistic environmental basis for water permeability testing of cables under diverse temperature conditions.

[0028] In one embodiment of the present invention, the through pipe 12 rotates on the test chamber 1; The passage pipe 12 is provided with a fourth toothed groove 121; a fifth motor is installed below the passage pipe 12; a fifth gear 122 is installed on the fifth motor; In this embodiment, the test chamber 1 is provided with a door 25 on its side, and the side of the door 25 located inside the test chamber 1 is curved. The door 25 is bolted to the test chamber 1. When it is necessary to add or replace soil in different partition groups, the fifth motor is controlled to drive the fifth gear 122 to rotate. The rotating fifth gear 122 will drive the through pipe 12 to rotate through the fourth tooth groove 121. The rotating through pipe 12 will drive the circular plate 11 and the overall test mechanism to rotate. When the door 25 is rotated to the top, the door 25 can be removed with a wrench to add or replace soil in different partition groups.

[0029] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are merely for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the invention. Furthermore, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The above description shows and describes the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A power cable water detection device, characterized in that, Includes a test chamber (1); the test chamber (1) contains two opposing circular plates (11); A through pipe (12) is installed on the opposite side of each of the two circular plates (11); a horizontal plate (13) is fixed on both the upper and lower sides of each of the two circular plates (11); A first motor is installed on each of the opposite sides of the horizontal plate (13); a lead screw (14) is installed on the first motor; the lead screw (14) is threaded into the screw barrel (15); Two testing mechanisms are provided between the two horizontal plates (13); the testing mechanism includes a testing chamber (2), and the top of the testing chamber (2) is fixedly connected to the screw cylinder (15); The test chamber (2) has a C-shaped groove (21) on one side, and the test chamber (2) is not penetrated on both sides of the C-shaped groove; a rotating roller (22) rotates inside the C-shaped groove (21), and the test chamber (2) is penetrated on both sides of the rotating roller (22); The rotating roller (22) extends to the outer ring surface on both sides of the test chamber (2) and has a first toothed groove (23); a first gear (24) rotates above the first toothed groove (23); the first gear (24) is driven by a second motor; a water flow component is provided in the middle of the rotating roller (22); The rotating roller (22) is provided with multiple partition groups, and each partition group includes two partitions (3), and the two partitions (3) are parallel to each other; the rotating roller (22) is provided with a slide rail (31), and the partitions (3) slide in the slide rail (31); Two opposing sealing plates (4) are provided between the test chambers (2); the top and bottom of the sealing plates (4) are both provided with arc surfaces; The two sealing plates (4) have semi-circular grooves (41) on opposite sides; the sealing plates (4) are driven by a driving mechanism.

2. The power cable water ingress detection apparatus of claim 1, wherein: Each of the partitions (3) has an extension plate (32) that slides within it, and the extension plate (32) is connected to a spring on one side of the partition (3) that slides within it. The extension plate (32) is fixed with an arc plate (33) on the opposite side.

3. The power cable water ingress detection apparatus of claim 2, wherein: The two sealing plates (4) are conical on opposite sides; The driving mechanism includes a driving rod (42); the driving rod (42) passes through the inside of the sealing plate (4) and extends to the opposite side of the two circular plates (11); the circular plates (11) are provided with an elongated oval groove (43), and the driving rod (42) slides in the elongated oval groove (43); The drive rod (42) has sliders (44) rotating on both sides; the drive rod (42) has second gears (45) fixed on both sides, and the second gears (45) are in contact with the sliders (44); the circular plate (11) has side plates fixed on both sides; the side plates are equipped with electric push rods (46), and the extension rods of the electric push rods (46) are fixed on the sliders (44); A third motor is fixed on the side plate; a third gear (47) rotates on the output shaft of the third motor, and the third gear (47) is opposite to the second gear (45).

4. The power cable water ingress detection apparatus of claim 1, wherein: The water flow assembly includes a water pipe (5); the water pipe (5) rotates in the middle of the two rotating rollers (22); one side of the water pipe (5) inside the rotating rollers (22) is blocked; The water pipe (5) is provided with an outlet (51); each of the partition groups is provided with a liquid tank (52) on the side facing the water pipe (5), and a liquid outlet (53) is provided on the liquid tank (52). In the initial state, the liquid outlet (53) is connected to the liquid tank (52). The liquid tank (52) has evenly arranged vertical grooves (54) on the side facing the extension plate (32), and the vertical grooves (54) are located between the two partitions (3); The water pipe (5) extends to the opposite side of the circular plate (11) on both sides; a rectangular groove (55) is provided on the circular plate (11); a sliding plate (56) slides in the rectangular groove (55), and the water pipe (5) passes through the sliding plate (56) and is rotatably connected to the sliding plate (56). When the water pipe (5) moves up and down, it will drive the sliding plate (56) to move up and down along the rectangular groove (55); The water pipe (5) extends to one side of the slide plate (56) and has a second toothed groove (57); a fourth motor is fixed on the slide plate (56); a fourth gear (58) is fixed on the output shaft of the fourth motor, and the fourth gear (58) meshes with the second toothed groove (57).

5. The power cable water ingress detection apparatus of claim 4, wherein: A pressure plate (6) is provided between the two partitions (3) of each partition group; the pressure plate (6) is provided with uniformly arranged through holes (61); a filter layer is fixed on the pressure plate (6) of the roller (22) located below; The pressure plate (6) is fixed with uniformly arranged sliding tubes (62) above it, and the sliding tubes (62) slide within the rotating roller (22); a driven gear (63) rotates between the sliding tube (62) and the partition plate (3), and the driven gear (63) rotates within the rotating roller (22); The partition (3) and the slide tube (62) are both provided with a third tooth groove (64) on the side facing the driven gear (63), and the third tooth groove (64) meshes with the driven gear (63).

6. The power cable water ingress detection apparatus of claim 5, wherein: The pressure plate (6) has uniformly arranged liquid cavities inside, and the liquid cavities are located between adjacent through holes (61). All the sliding tubes (62) are connected to the liquid cavity; a guide tube (65) slides inside one of the sliding tubes (62), and the guide tube (65) extends to the left side of the water pipe (5); a through groove (66) is opened at the top of the other sliding tube (62), and the through groove (66) passes through the rotating roller (22).

7. The power cable water ingress detection apparatus of claim 6, wherein: The pressure plate (6) is fixed with uniformly arranged cone plates (67) on the side away from the rotating roller (22), and the cone plates (67) are made of thermally conductive metal material.

8. The power cable water ingress detection apparatus of claim 1, wherein: The tube (12) rotates on the test box (1); The passage pipe (12) is provided with a fourth toothed groove (121); a fifth motor is installed below the passage pipe (12); a fifth gear (122) is installed on the fifth motor.

9. The power cable water detection apparatus of claim 8, wherein: The test box (1) is provided with a door (25) on the side, and the side of the door (25) inside the test box (1) is curved. The door (25) is bolted to the test box (1).

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