A cold-resistant and icing-resistant cable for photovoltaic power stations and its processing technology

Abstract

This invention relates to a cable for photovoltaic power plants, specifically a cold-resistant and anti-icing cable for photovoltaic power plants and its processing technology. It includes several cooling chamber plates, friction components, cooling chambers containing liquid, and a pre-reserved chamber in a hollow state. This invention utilizes wind power to cause the cable body to sway, causing the liquid in the inner end of each cooling chamber to surge. The thrust generated by this surge drives the friction components to move, and in conjunction with a return spring, achieves reciprocating movement, cyclically rubbing against the inner friction layer. The heat generated is conducted through the inner wall to the outer wall of the outer protective shell, heating and melting the attached ice. This prevents the cable body from becoming overburdened due to excessive ice accumulation. Furthermore, since the area of ​​frictional heat generation is inside the cable, it avoids the influence of external ice formation, improving the ice removal effect.

Description

Technical Field

[0001] This invention relates to a cable for photovoltaic power plants, and more specifically, to a cold-resistant and anti-icing cable for photovoltaic power plants and its processing technology. Background Technology

[0002] As the core carrier of power transmission in a photovoltaic power station, the selection, performance, installation, and maintenance of photovoltaic power station cables directly affect the efficiency and safety of the power station.

[0003] Because cables used in photovoltaic power stations need to be exposed to the outdoor environment for a long time, when exposed to severe cold weather, the water droplets that accumulate on their surface can easily freeze into ice and adhere to the cable surface. The solidified ice layer will increase the load on the cable. If de-icing is not carried out for a long time, the amount of ice on the cable surface will gradually increase, which can easily lead to overloading of the cable and damage, affecting the service life of the cable.

[0004] A type of outdoor high-altitude anti-freeze and crack cable with publication number CN113948249A includes an outer shell, a guide post slidably connected to the inner wall of the outer shell, a friction plate fixedly connected to the end of the guide post away from the outer shell, the side of the friction plate away from the guide post contacting the surface of the friction sleeve, and a guide plate fixedly connected to the surface of the outer shell. During use, the cable's own power comes from wind power, which drives the outer shell to rotate by the external guide plate as the main driving source. However, when the cable is used at high altitudes (in winter), thin ice is easily formed on its surface. When the ice freezes the guide plate, and due to the existence of friction, it is difficult for the wind to drive the guide plate to rotate. Once the guide plate rotates, friction heating and subsequent de-icing operations cannot be performed.

[0005] To address the aforementioned issues, there is an urgent need for a cold-resistant and icing-resistant cable for photovoltaic power plants and its processing technology. Summary of the Invention

[0006] The purpose of this invention is to provide a cold-resistant and anti-icing photovoltaic power station cable and its processing technology. When the cable body is affected by wind and sways, the liquid in the inner end of the cooling chamber surges. The thrust generated by the surge acts on the bottom side of the cooling chamber plate, pushing the cooling chamber plate to slide along the inner end of the insulation layer. Friction is generated at the contact point between its top and the inner friction layer. The heat generated by the friction melts the ice on the outer wall of the outer protective shell, thereby solving the problems mentioned in the background art, namely:

[0007] Once the ice blocks freeze the guide plate, the friction makes it difficult for the wind to rotate the guide plate. Once the guide plate rotates, frictional heat generation and subsequent de-icing operations cannot be performed.

[0008] To achieve the above objectives, one objective of this invention is to provide a cold-resistant and anti-icing photovoltaic power station cable, comprising an inner core and an outer protective shell wrapped around the outer side of the inner core. A heat insulation layer is reserved between the inner side of the outer protective shell and the outer side of the inner core. A plurality of cooling chamber plates are arrayed on the inner side of the heat insulation layer. A friction component is slidably disposed on the inner end of the cooling chamber plate, and the bottom end of the friction component extends into the inner end of the cooling chamber plate, dividing the inner end of the cooling chamber plate into a cooling chamber containing liquid and a reserved chamber in a hollow state.

[0009] Furthermore, the top of the friction assembly contacts the inner wall of the outer protective shell, and an inner friction layer is provided at the contact position between the inner wall of the outer protective shell and the friction assembly;

[0010] The liquid inside the cooling chamber surges, and the thrust generated by the surge acts on the bottom side of the cooling chamber plate, pushing the cooling chamber plate to slide along the inner end of the insulation layer. Friction is generated at the contact point between its top and the inner friction layer. The heat generated by the friction melts the ice on the outer wall of the outer protective shell. In other words, the friction heat generation work is completed inside the cable, avoiding the influence of external ice on the friction heat generation work and improving the ice removal effect.

[0011] Furthermore, the liquid stored at the inner end of the cooling chamber is coolant, which not only ensures normal flow, but also the cooling energy generated by the coolant can neutralize the heat remaining in the inner end of the insulation layer, reducing the impact of temperature rise on the inner core.

[0012] Meanwhile, the horizontal height of the reserved chamber is always higher than that of the cooling chamber. During the resetting process of the friction component, it is not only subjected to elastic force but also to its own gravity, which further accelerates the resetting speed and improves the friction effect. In addition, since the cooling chamber is located close to the ground, the coolant stored inside always maintains a certain gap with the friction component, creating a certain acceleration zone between the coolant and the friction component. This ensures that the coolant can provide sufficient thrust when it comes into contact with the friction component, thereby improving the moving efficiency of the friction component.

[0013] The second objective of this invention is to provide a processing technology for producing cold-resistant and icing-resistant cables for photovoltaic power plants, comprising the following steps:

[0014] S1. Inject liquid into the inner end of the cooling chamber plate, and maintain the injection amount to create a gap between the liquid and the friction components.

[0015] S2. The cooling chamber plates containing liquid are arranged in an array at the inner end of the heat insulation layer, with a gap reserved between adjacent cooling chamber plates.

[0016] S3. Adhere the inner friction layer to the inner wall of the outer protective shell, and put the integrally formed inner friction layer and the outer protective shell on the outside of the heat insulation layer to make the top of the friction assembly contact the inner wall of the inner friction layer.

[0017] S4. Seal both ends of the cable body.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In the cold-resistant and anti-icing photovoltaic power station cable and its processing technology, the cable body is shaken by the wind, causing the liquid in the inner end of each cooling chamber to surge. The thrust generated by the surge will drive the friction components to move, and with the help of the return spring, they will reciprocate. They will circulate and rub against the inner friction layer. The heat generated will be conducted through the inner wall to the outer wall of the outer protective shell, heating and melting the attached ice. This will prevent the cable body from being overburdened due to excessive ice accumulation. Moreover, the area where friction heat is generated is inside the cable, which can avoid the impact of external ice and improve the ice removal effect.

[0020] 2. In the cold-resistant and anti-icing photovoltaic power station cable and its processing technology, the liquid stored in the inner end of the cooling chamber is a coolant, which can ensure normal flow, and at the same time, the cooling capacity generated by the coolant can neutralize the heat remaining in the inner end of the insulation layer, reducing the impact of temperature rise on the inner core.

[0021] 3. In the cold-resistant and anti-icing photovoltaic power station cable and its processing technology, since the horizontal height of the reserved chamber is higher than that of the cooling chamber, the friction component is subjected not only to elastic force but also to its own gravity during the reset process, which further accelerates the reset speed and improves the friction effect. In addition, since the cooling chamber is located close to the ground, the coolant stored inside always maintains a certain gap with the friction component, so that a certain acceleration zone is formed between the coolant and the friction component, ensuring that the coolant can provide sufficient thrust when it comes into contact with the friction component, thereby improving the moving efficiency of the friction component. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Enlarged view of a portion of point A in the middle;

[0024] Figure 3 This is a schematic plan view of the overall structure of the present invention;

[0025] Figure 4 This is a planar sectional view of the overall structure of the present invention;

[0026] Figure 5 For the present invention Figure 4 Enlarged view of a section at point B in the middle;

[0027] Figure 6 This is a schematic diagram simulating the shaking state of the present invention.

[0028] The meanings of the labels in the diagram are as follows:

[0029] 10. Outer protective shell; 110. Inner friction layer;

[0030] 20. Inner core;

[0031] 30. Insulation layer;

[0032] 40. Cooling chamber plate; 410. Friction assembly; 411. Return spring; 420. Reserved chamber; 430. Cooling chamber; 440. Roller; 450. Baffle plate. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-2 As shown, one of the objectives of this invention is to provide a cold-resistant and anti-icing photovoltaic power station cable, including an inner core 20 and an outer protective shell 10 wrapped around the outer side of the inner core 20. A heat insulation layer 30 is reserved between the inner side of the outer protective shell 10 and the outer side of the inner core 20. A plurality of cooling chamber plates 40 are arrayed on the inner side of the heat insulation layer 30. A friction assembly 410 is slidably disposed at the inner end of the cooling chamber plate 40, and the bottom end of the friction assembly 410 extends into the inner end of the cooling chamber plate 40. Figure 5 As shown, the friction assembly 410 divides the inner end of the cooling chamber plate 40 into a cooling chamber 430 containing liquid and a reserved chamber 420 in a hollow state.

[0035] The top of the friction assembly 410 contacts the inner wall of the outer protective shell 10, and an inner friction layer 110 is provided at the contact position between the inner wall of the outer protective shell 10 and the friction assembly 410.

[0036] When the cable body is affected by wind and shakes, the liquid in the inner end of the cooling chamber 430 surges. The thrust generated by the surge acts on the bottom side of the cooling chamber plate 40, pushing the cooling chamber plate 40 to slide along the inner end of the heat insulation layer 30. The top of the plate 40 rubs against the inner friction layer 110, and the heat generated by the friction melts the ice on the outer wall of the outer protective shell 10.

[0037] The details are as follows:

[0038] To ensure the stable operation of the inner core 20, the outer protective shell 10 is wrapped around the outer side of the inner core 20 to protect it and isolate it from the influence of the external environment. Therefore, the outer wall of the inner core 20 is exposed. In cold weather, rainwater and water will adhere to the outer wall of the outer protective shell 10. When the accumulation reaches a certain amount, it will solidify into ice and adhere to the outer wall of the outer protective shell 10. If it is not cleaned for a long time, new ice will cover the outer surface of the old ice, causing the load on the entire cable body to increase continuously.

[0039] Therefore, this design includes a heat insulation layer 30 between the inner wall of the inner core 20 and the outer wall of the outer protective shell 10. Figure 3 As shown, the inner end of the heat insulation layer 30 has several cooling chamber plates 40, and the inner end of the cooling chamber plate 40 is divided into two areas by the friction assembly 410. One area is a cooling chamber 430 containing liquid, and the other area is a reserved chamber 420 in a hollow state. At the same time, the bottom end of the friction assembly 410 is attached to the bottom of the inner end of the cooling chamber plate 40 to prevent the liquid in the inner end of the cooling chamber 430 from leaking into the inner end of the reserved chamber 420. In order to ensure that the friction assembly 410 can slide stably, its material is plastic. The lightweight design can adapt to the thrust generated by the surging liquid, so that the surging liquid can easily drive the friction assembly 410 to slide.

[0040] like Figures 4-5 As shown, an inner friction layer 110 is provided on the inner wall of the outer protective shell 10, and the top of the friction component 410 extends out of the inner end of the cooling cavity plate 40 and contacts the inner wall of the inner friction layer 110. When the friction component 410 moves, it will contact the inner friction layer 110 in a stationary state. Frictional resistance will be generated at the contact point. The inner friction layer 110 is made of aluminum oxide and its surface is coated with 40nm silicone resin. Experiments show that when the silicone resin coating thickness exceeds 50μm, the temperature of the inner core 20 increases by 15 degrees Celsius after 10 minutes of friction under 5N contact. Therefore, when the cable body is affected by wind... When shaking occurs, the cooling chamber plates 40 at the inner end of the heat insulation layer 30 will shake, causing the liquid stored in the inner end of the cooling chamber 430 to surge. The surging liquid will come into contact with the bottom side of the friction component 410, and the resulting thrust will directly act on the bottom side of the friction component 410, pushing it to move towards the inner end of the reserved chamber 420. Since the top and bottom of the friction component 410 are integrally formed, they will move synchronously and come into contact with the inner friction layer 110. The friction generates heat to heat the outer protective shell 10, thereby melting the ice attached to the outer wall of the outer protective shell 10.

[0041] Furthermore, during the heating process, some heat remains inside the insulation layer 30, and this heat comes into direct contact with the outer wall of the inner core 20, causing the temperature inside the inner core 20 to rise, which will affect the operation of the inner core 20. To address the above problem, the liquid stored inside the cooling chamber 430 is a coolant, which can ensure normal flow, and the cooling generated by the coolant can neutralize the heat remaining inside the insulation layer 30, reducing the impact of the temperature rise on the inner core 20.

[0042] Furthermore, such as Figure 6 As shown, since the pushing direction during the surging process is consistent, it drives the friction component 410 to move closer to the reserved chamber 420. If the friction component 410 moves to the inner side wall of the reserved chamber 420, that is, the friction component 410 is furthest from the cooling chamber 430, the impact of the surging on the friction component 410 is small, resulting in a smaller displacement of the friction component 410. This reduces the efficiency of friction in converting heat into heat, requiring a significant amount of time to complete the ice-melting process. Therefore, to improve the ice-melting efficiency, a return spring 411 is installed between the side of the friction component 410 and the inner wall of the reserved chamber 420 to achieve the reciprocating motion of the friction component 410. That is, the thrust generated during the surging state will overcome the elasticity of the return spring 411, driving the friction component 410 to move towards the inner end of the reserved chamber 420. When the thrust generated by the surging cannot overcome the elasticity of the return spring 411, the return spring 411 reverses and drives the friction component 410 to reset, thereby achieving the reciprocating sliding of the friction component 410, improving the friction effect, and ensuring the heat generation efficiency.

[0043] To further improve the sliding effect of the friction assembly 410, the cooling chambers 430 at each position are all located on the inner end of the cooling chamber plate 40 near the ground. That is, the horizontal height of the reserved chamber 420 is always higher than that of the cooling chamber 430. When the thrust generated by the surge is difficult to overcome the elastic force of the return spring 411, since the horizontal height of the reserved chamber 420 is higher than that of the cooling chamber 430, the friction assembly 410 is not only subject to the elastic force, but also to its own gravity during the reset process, which further accelerates the reset speed and improves the friction effect. In addition, since the cooling chamber 430 is located near the ground, the coolant stored inside it always maintains a certain gap with the friction assembly 410, so that a certain acceleration zone is formed between the coolant and the friction assembly 410, ensuring that the coolant can provide sufficient thrust when it comes into contact with the friction assembly 410, thereby improving the moving efficiency of the friction assembly 410.

[0044] Since the friction assembly 410 is a one-piece molded structure, in order to ensure synchronous sliding of the upper and lower ends, a gap for sliding of the friction assembly 410 needs to be opened on the top of the cooling chamber plate 40. However, the existence of the gap, regardless of its size, will cause leakage of the surging coolant. In order to avoid the above problem, a baffle plate 450 is provided on the friction assembly 410. The baffle plate 450 is attached to the outer wall of the cooling chamber plate 40, and the width and length of the baffle plate 450 are much greater than the width and length of the gap, so that it can always cover the outside of the gap during synchronous movement with the friction assembly 410, maintain the sealing effect of the gap, and prevent leakage.

[0045] Finally, in order to reduce the frictional impact on the bottom of the friction assembly 410 during sliding, a roller 440 is used to replace the friction assembly 410 in contact with the inner wall of the cooling chamber plate 40, thereby reducing the contact area between the friction assembly 410 and the cooling chamber plate 40. This reduces the frictional resistance generated at the contact point, allowing the friction assembly 410 to respond quickly and improving the sliding effect of the friction assembly 410.

[0046] The second objective of this invention is to provide a processing technology for producing cold-resistant and icing-resistant cables for photovoltaic power plants, comprising the following steps:

[0047] S1. Inject liquid into the inner end of the cooling chamber plate 40, and maintain the injection amount to create a gap between the liquid and the friction assembly 410.

[0048] S2. The cooling chamber plates 40 containing liquid are arranged in an array at the inner end of the heat insulation layer 30, and a gap is reserved between adjacent cooling chamber plates 40.

[0049] S3. The inner friction layer 110 is bonded to the inner wall of the outer protective shell 10, and the integrally formed inner friction layer 110 and the outer protective shell 10 are sleeved on the outside of the heat insulation layer 30, so that the top of the friction assembly 410 comes into contact with the inner wall of the inner friction layer 110.

[0050] S4. Seal both ends of the cable body.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit 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 present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold-resistant and anti-icing photovoltaic power station cable, comprising an inner core (20) and an outer protective shell (10) wrapped around the outer side of the inner core (20), characterized in that: A heat insulation layer (30) is reserved between the inner side of the outer protective shell (10) and the outer side of the inner core (20). A plurality of cooling chamber plates (40) are arranged in an array on the inner side of the heat insulation layer (30). A friction assembly (410) is slidably arranged at the inner end of the cooling chamber plate (40), and the bottom end of the friction assembly (410) extends into the inner end of the cooling chamber plate (40), dividing the inner end of the cooling chamber plate (40) into a cooling chamber (430) containing liquid and a reserved chamber (420) in a hollow state. The top of the friction assembly (410) contacts the inner wall of the outer protective shell (10), and an inner friction layer (110) is provided at the contact position between the inner wall of the outer protective shell (10) and the friction assembly (410). When the cable body is affected by the wind and shakes, the liquid in the inner end of the cooling chamber (430) surges. The thrust generated by the surge acts on the bottom side of the cooling chamber plate (40), pushing the cooling chamber plate (40) to slide along the inner end of the heat insulation layer (30). Its top end rubs against the contact position of the inner friction layer (110), and the heat generated by the friction melts the ice on the outer wall of the outer protective shell (10). The liquid contained in the inner end of the reserved chamber (420) is coolant; The horizontal height of each of the reserved chambers (420) is higher than that of the corresponding cooling chamber (430), and a gap is reserved between the coolant contained in the inner end of the cooling chamber (430) and the side of the friction assembly (410); A return spring (411) is connected between the side of the friction assembly (410) and the inside of the reserved cavity (420).

2. The cold-resistant and anti-icing photovoltaic power station cable according to claim 1, characterized in that: The internal friction layer (110) is made of aluminum oxide and its surface is coated with 40nm silicone resin.

3. The cold-resistant and anti-icing photovoltaic power station cable according to claim 1, characterized in that: The top of the friction assembly (410) is arc-shaped, and the bottom of the friction assembly (410) is in contact with the bottom wall of the cooling cavity plate (40).

4. The cold-resistant and anti-icing photovoltaic power station cable according to claim 3, characterized in that: The friction assembly (410) is provided with a baffle plate (450), and the baffle plate (450) is in contact with the outer side of the top of the cooling chamber plate (40).

5. The cold-resistant and anti-icing photovoltaic power station cable according to claim 4, characterized in that: The friction assembly (410) is provided with a pair of rollers (440) near the inner end of the cooling chamber plate (40), and the two rollers (440) respectively contact the upper and lower sides of the inner end of the cooling chamber plate (40).

6. A processing method for producing the cold-resistant and anti-icing photovoltaic power station cable as described in claim 1, characterized in that: The methods and steps include the following: S1. Inject liquid into the inner end of the cooling chamber plate (40), and the injection amount maintains a gap between the liquid and the friction assembly (410); S2. The cooling chamber plates (40) containing liquid are arranged in a series on the inner end of the heat insulation layer (30), and a gap is reserved between adjacent cooling chamber plates (40). S3. The inner friction layer (110) is bonded to the inner wall of the outer protective shell (10), and the integrally formed inner friction layer (110) and the outer protective shell (10) are fitted on the outside of the heat insulation layer (30) to make the top of the friction assembly (410) contact the inner wall of the inner friction layer (110). S4. Seal both ends of the cable body.

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