Corrosion-resistant tensile photovoltaic cable for connecting offshore photovoltaic modules

Abstract

The invention relates to the technical field of offshore photovoltaic power transmission, in particular to a corrosion-resistant tensile photovoltaic cable for connecting offshore photovoltaic modules, which comprises an outer sheath, and the outer sheath comprises a left sheath section and a right sheath section which are fixedly connected through a middle section. According to the corrosion-resistant tensile photovoltaic cable for connecting the offshore photovoltaic module, the structure that the two cores are arranged in parallel is adopted, the middle of the cable is integrally formed through the connecting rib, the stress generated in the bending process of the cable can be reduced through the structural design, the flexibility and the bending resistance of the cable are improved, and the service life of the cable is prolonged. The device is more suitable for complex mounting and using environments on the sea; and active heat dissipation can be performed on the interiors of the sheath sections on the two sides by using the magnetic control diversion mechanism and the electric control diversion module, so that the functionality and the internal diversion performance of the whole cable are improved, and the durability is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore photovoltaic power transmission, in particular to a corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic components. Background Art

[0002] With the growing global demand for clean energy, the offshore photovoltaic industry is developing rapidly, offering promising market prospects. However, the extremely complex offshore environment places stringent demands on the performance of photovoltaic cables. While currently available salt-fog-resistant and waterproof photovoltaic cables used in offshore photovoltaic applications can meet some basic connectivity requirements, they still suffer from numerous drawbacks and shortcomings. First, there is a lack of unified standards for offshore photovoltaic cables, resulting in varying product quality. Design institutes and clients lack a reliable basis for selection, making it difficult to ensure that product performance meets actual project requirements. Second, existing cables lack adequate corrosion resistance and tensile strength. Water vapor and salt spray at sea are severely corrosive, easily corroding the conductors and insulation sheaths of conventional cables, shortening their service life and increasing maintenance costs. Furthermore, frequent winds and waves at sea subject cables to prolonged tensile and bending forces. Existing cable designs are susceptible to internal structural damage and conductor breakage under these conditions, compromising the stable operation of the photovoltaic system. Furthermore, the cables lack active internal heat dissipation mechanisms, leading to localized heat accumulation that can severely impact the cable's operational performance and service life. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the existing cable structure design is prone to internal structural damage, conductor breakage and other problems under the action of wind and waves, affecting the stable operation of the photovoltaic system; at the same time, there is no active heat-equalizing mechanism inside the cable, which leads to heat accumulation in local internal locations, which will seriously affect the operating status and service life of the cable.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules, including an outer sheath, the outer sheath including a left sheath section and a right sheath section fixedly connected by a middle section, conductors are installed inside the left sheath section and the right sheath section, a reinforcing core is installed in the middle position of the middle section, a plurality of annular adjustment covers are installed on the middle section, the upper end of the side wall of the annular adjustment cover is fixedly connected to a first guide pipe, the lower end of the side wall of the annular adjustment cover is fixedly connected to a second guide pipe, a magnetic control guide mechanism is installed inside the annular adjustment cover, and an electric control guide module cooperating with the magnetic control guide mechanism is installed inside the annular adjustment cover on the outermost side of the middle section.

[0005] The connecting end between the left sheath section and the middle section and the connecting end between the right sheath section and the middle section are both provided with a side flow guide chamber connected to the magnetic control flow guide mechanism.

[0006] An arc-shaped heat-conducting cover is fixed on the inner wall of the side flow-conducting chamber adjacent to the conductor end.

[0007] An arc-shaped control flow channel for installing a magnetic control flow guide mechanism is provided inside the annular adjustment cover. The two ends of the arc-shaped control flow channel are respectively connected to the first flow guide pipe and the side flow guide chamber of the left sheath section, and the two ends of the arc-shaped control flow channel are respectively connected to the second flow guide pipe and the side flow guide chamber of the right sheath section.

[0008] The magnetically controlled flow guiding mechanism comprises an embedded annular electromagnet installed on the inner wall of the arc-shaped control flow channel, an iron extrusion spring of the embedded annular electromagnet, and an arc-shaped flow guiding cover controlled by the iron extrusion spring.

[0009] An annular flow guide chamber for installing an electric-controlled flow guide module is provided inside the annular adjustment cover at the outermost side of the middle section.

[0010] The electrically controlled flow guide module comprises an annular driving motor mounted on the inner arc surface of the annular flow guide chamber and annular centrifugal blades controlled by the annular driving motor.

[0011] A temperature sensor controller for controlling the magnetic control flow guiding mechanism is fixedly mounted on the side wall of the arc-shaped heat-conducting cover.

[0012] The arc-shaped air guide cover is staggered with an arc-shaped internal air guide channel and a horizontal internal air guide channel.

[0013] Both ends of the arc-shaped heat-conducting cover are provided with curved support sections.

[0014] The beneficial effects of the present invention are: (1) The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules of the present invention adopts a structure in which two cores are arranged in parallel and are integrally formed by connecting ribs in the middle. This structural design can reduce the stress generated by the cable during bending, improve the flexibility and bending resistance of the cable, and make it more suitable for complex installation and use environments at sea; (2) A steel wire rope reinforcement core is embedded in the connecting ribs. The steel wire rope adopts a multi-strand twisted structure. This structure has both softness and high strength, can effectively withstand tension, improve the overall tensile performance of the cable, ensure the cable structure is intact under external forces such as wind and wave impact, and ensure stable power transmission; (3) A plurality of annular adjustment covers are installed on the middle section, which not only strengthens the structural strength of the sheath sections on both sides, but also allows the assembly of the magnetic control flow guide mechanism and the electric control flow guide module for easy control; (4) The magnetically controlled flow guide mechanism and the electrically controlled flow guide module can actively dissipate heat inside the sheath sections on both sides, thereby improving the functionality and internal flow conductivity of the entire cable and thus enhancing durability; (5) By fixing the connecting guide pipe on the side wall of the annular regulating cover, it can cooperate with the circulation; (6) The entire diversion control mechanism adopts a built-in structural design, which can improve the sealing and durability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and examples.

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the magnetically controlled flow guiding mechanism in the present invention.

[0019] Figure 4 It is a schematic diagram of the internal structure of the assembly end of the electric control flow guide module in the present invention. DETAILED DESCRIPTION

[0020] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0021] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0022] Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules shown in the figure includes an outer sheath, which includes a left sheath section 2 and a right sheath section 3 fixedly connected by a middle section 1. Conductors 4 are installed inside the left sheath section 2 and the right sheath section 3. Insulation layers are provided between the left sheath section 2, the right sheath section 3 and the conductor 4. A reinforcing core 5 is installed in the middle position of the middle section 1. The mechanically optimized structure of the reinforcing core 5 of parallel double conductors + steel wire rope increases the tensile strength by 30%; two annular adjustment covers 6 are installed on the middle section 5, and the upper end of the side wall of the annular adjustment cover 6 is fixedly connected to the first guide pipe 7, and the lower end of the side wall of the annular adjustment cover 6 is fixedly connected to the second guide pipe 8. A magnetic control guide mechanism 9 is installed inside the annular adjustment cover 6, and an electric control guide module 10 cooperating with the magnetic control guide mechanism 9 is installed inside the outermost annular adjustment cover 6 of the middle section 1.

[0023] Conductor 4 is a stranded, tinned copper soft conductor. This tinned conductor offers excellent flexibility, conductivity, and corrosion resistance, meeting the product's requirements for use in a variety of complex environments. To further enhance the performance of conductor 4, copper foil is evenly added during the stranding process. This addition enhances the conductor's overall strength. The insulation layer is made of EPDM, which offers excellent resistance to water, high temperatures, low temperatures, and weathering, ensuring long-term stable operation in the cable's complex offshore climates. The left and right sheath sections 2 and 3 are constructed of chlorosulfonated polyethylene, which offers excellent chemical stability and mechanical strength, effectively resisting corrosion from seawater and salt spray, and protecting the internal structure.

[0024] In order to cooperate with the inner diversion, the connecting end of the left jacket section 2 and the middle section 1 and the connecting end of the right jacket section 3 and the middle section 1 are both provided with a side diversion chamber 21 connected to the magnetic control diversion mechanism 9.

[0025] In order to cooperate with internal support and heat dissipation, an arc-shaped heat-conducting cover 22 is fixed on the inner wall of the side flow guide chamber 21 near the conductor end.

[0026] In order to cooperate with internal installation, an arc-shaped control flow channel 61 for installing the magnetic control flow guide mechanism 9 is opened inside the annular adjustment cover 6. The two ends of the arc-shaped control flow channel 61 are respectively connected to the first flow guide pipe 7 and the side flow guide chamber 21 of the left sheath section 2, and the two ends of the arc-shaped control flow channel 61 are respectively connected to the second flow guide pipe 8 and the side flow guide chamber 21 of the right sheath section 3.

[0027] In order to cooperate with the magnetic control adjustment, the magnetic control flow guide mechanism 9 includes an embedded annular electromagnet 91 installed on the inner wall of the arc-shaped control flow channel 61, an iron extrusion spring 92 of the embedded annular electromagnet 91 and an arc-shaped flow guide cover 93 controlled by the iron extrusion spring 92.

[0028] The embedded annular electromagnet 91 is powered on and started, thereby controlling the iron extrusion spring 92 to contract, and the iron extrusion spring 92 then drives the arc-shaped flow guide cover 93 to slide and adjust inside the arc-shaped control flow channel 61.

[0029] The iron extrusion spring 92 stretches and moves away from the outer end to squeeze the inner end of the arc-shaped control flow channel 61. At this time, the openings at both ends of the arc-shaped flow guide cover 93 are cut off and closed by the arc-shaped control flow guide 61; when the embedded annular electromagnet 91 is closed, the iron extrusion spring 92 contracts, and the openings at both ends of the arc-shaped flow guide cover 93 are connected to the first flow guide tube 7 and the side flow guide chamber 21 of the left sheath section 2 or the second flow guide tube 8 and the side flow guide chamber 21 of the right sheath section 3.

[0030] In order to cooperate with the end diversion, an annular diversion chamber 11 for installing the electric control diversion module 10 is opened inside the annular adjustment cover 6 on the outermost side of the middle section 1.

[0031] In order to cooperate with active flow diversion, the electric-controlled flow diversion module 10 includes an annular driving motor 101 installed on the inner arc surface of the annular flow diversion chamber 11 and annular centrifugal blades 102 controlled by the annular driving motor 101 .

[0032] The annular driving motor 101 drives the annular centrifugal blades 102 to rotate, and the air is drawn into the first air guide pipe 7 through the annular centrifugal blades 102 and then blown out from the second air guide pipe 8.

[0033] In order to cooperate with temperature sensing control, a temperature sensing controller 12 for controlling the magnetic control flow guiding mechanism 9 is fixedly installed on the side wall of the arc-shaped heat conductive cover 93 .

[0034] The temperature sensor controller 12 is a prior art, which controls the magnetic control flow guide mechanism 9 at the relative position by monitoring the temperature at the connection end, thereby opening the connection between the annular adjustment cover 6 and the side flow guide chamber 21 at that position.

[0035] In order to facilitate the adjustment and connection, a curved internal flow guide channel 931 and a horizontal internal flow guide channel 932 are staggeredly opened inside the curved air guide cover 93.

[0036] Under normal circumstances, the annular adjustment cover 6 is circulated and connected to the second guide tube 8 and the electric control guide module 10 through the first guide tube 7. At this time, the first guide tube 7 is connected to the horizontal internal guide channel 932 inside the annular adjustment cover 6, and the second guide tube 8 is connected to the horizontal internal guide channel 932 inside the annular adjustment cover 6. When the heat generated inside the left jacket section 2 or the right jacket section 3 is large, the temperature sensor controller 12 is activated, and the temperature sensor controller 12 controls the embedded annular electromagnet 91 to adjust the iron extrusion spring 92 to extend and retract. The iron extrusion spring 92 drives the arc-shaped guide cover 93 to the side of the side guide chamber 21 of the left jacket section 2. Sliding adjustment, at this time, one end of the arc-shaped internal guide channel 931 is opened, and the other end is inserted into the side guide chamber 21 of the left sheath segment 2 for communication. At this time, the air inside the first guide tube 7 is introduced into the side guide chamber 21 through the upper arc-shaped internal guide channel 931, and then flows back to the upper arc-shaped internal guide channel 931 along the side guide chamber 21, and is drawn back into the electric-controlled guide module 10 by the first guide tube 7; similarly, the electric-controlled guide module 10 blows the air to the second guide tube 8, and then through the above principle, it is introduced into the side guide chamber 21 of the right sheath segment 3 through the lower arc-shaped internal guide channel 931.

[0037] In order to improve the internal support strength of the side flow guide chamber 21 , both ends of the arc-shaped heat conductive cover 93 have curved support sections.

[0038] The arc-shaped heat-conducting cover 93 is supported on both sides of the side flow-guiding chamber 21 by the curved support sections at both ends, thereby ensuring the support inside the side flow-guiding chamber 21 .

[0039] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules, including an outer sheath, characterized by: The outer sheath comprises a left sheath section (2) and a right sheath section (3) fixedly connected by an intermediate section (1), a conductor (4) being installed inside the left sheath section (2) and the right sheath section (3), a reinforcing core (5) being installed at a central position of the intermediate section (1), a plurality of annular adjustment covers (6) being installed on the intermediate section (1), a first flow guide tube (7) being fixedly connected to the upper end of the side wall of the annular adjustment cover (6), a second flow guide tube (8) being fixedly connected to the lower end of the side wall of the annular adjustment cover (6), a magnetic control flow guide mechanism (9) being installed inside the annular adjustment cover (6), and an electric control flow guide module (10) cooperating with the magnetic control flow guide mechanism (9) being installed inside the outermost annular adjustment cover (6) of the intermediate section (1).

2. The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules according to claim 1 is characterized by: The connecting end between the left sheath section (2) and the middle section and the connecting end between the right sheath section (3) and the middle section (1) are both provided with a side flow guide chamber (21) connected to the magnetic control flow guide mechanism (9).

3. The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules according to claim 2 is characterized by: An arc-shaped heat-conducting cover (22) is fixed on the inner wall of the side flow-conducting chamber (21) adjacent to the conductor (4).

4. The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules according to claim 2 is characterized by: An arc-shaped control flow channel (61) for installing a magnetic control flow guide mechanism (9) is provided inside the annular adjustment cover (6).

5. The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules according to claim 4 is characterized by: The magnetically controlled flow guide mechanism (9) comprises an embedded annular electromagnet (91) mounted on the inner wall of the arc-shaped control flow channel (61), an iron extrusion spring (92) of the embedded annular electromagnet (91), and an arc-shaped flow guide cover (93) controlled by the iron extrusion spring (92).

6. The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules according to claim 1 is characterized by: An annular flow guiding chamber (11) for installing an electrically controlled flow guiding module is provided inside the annular adjustment cover (6) at the outermost side of the middle section (1).

7. The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules according to claim 6 is characterized by: The electrically controlled flow guide module (10) comprises an annular drive motor (101) mounted on the inner arc surface of the annular flow guide chamber (11) and annular centrifugal blades (102) controlled by the annular drive motor (101).

8. The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules according to claim 3 is characterized by: A temperature sensor controller (12) for controlling the magnetically controlled flow guiding mechanism is fixedly mounted on the side wall of the arc-shaped heat-conducting cover (93).

9. The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules according to claim 5, characterized in that: The arc-shaped flow guide cover (93) is provided with an arc-shaped internal flow guide channel (931) and a horizontal internal flow guide channel (932) in a staggered manner.

10. The corrosion-resistant and tensile-resistant photovoltaic cable for connecting offshore photovoltaic modules according to claim 3, characterized in that: Both ends of the arc-shaped heat-conducting cover (22) are provided with curved support sections.

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