A new energy power generation insulated high-voltage cable and an end welding method thereof

Abstract

The application discloses a new energy power generation insulated high-voltage cable and an end welding method thereof, and relates to the technical field of welding equipment manufacturing. The new energy power generation insulated high-voltage cable comprises a copper conductor and a halogen-free low-smoke flame-retardant polyolefin sheath. The copper conductor is sequentially provided with a polypropylene inner shield, polypropylene insulation, a polypropylene outer shield, a copper alloy tape shield, a semi-conductive tape, a semi-conductive copper plastic tape, and a semi-conductive polyolefin inner sheath in the outer direction. The inner shield, the outer shield and the insulation are made of non-crosslinked thermoplastic polypropylene material. The production process adopts a three-layer co-extrusion, non-crosslinking, pressure maintaining, air cooling and water cooling process. The new energy power generation insulated high-voltage cable has good electrical performance, mechanical performance and anti-aging performance, and can save production energy consumption. The inner shield material and the outer shield material are mainly made of polypropylene, and conductive carbon black and other various additives are added and granulated by melting. The insulation material is mainly made of polypropylene, various additives are added, and the insulation material is modified and granulated by melting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding equipment manufacturing, in particular to an insulation high-voltage cable for new energy power generation and an end head welding method thereof. BACKGROUND

[0002] The electric wire and cable used in the new energy power transmission field such as wind power generation and photovoltaic power generation in China is designed, produced, and sold according to the national standard GB / T 12706 "Rated Voltage 1kV to 35kV Extruded Insulated Power Cables and Accessories", wherein the electric wire and cable is selected from YJV and VV series electric wire and cable, the electric cable does not have water resistance, and the insulation material thereof is cross-linked polyethylene and polyvinyl chloride.

[0003] Disadvantages of cross-linked polyethylene insulated cable: cross-linked polyethylene insulation has high process difficulty in the processing process, because the material usually needs high temperature and high pressure to be shaped, and these processes often cause the material performance to decrease. The production cost of cross-linked polyethylene insulation of the cable is relatively high, in addition to the cost of the material itself, the cost of equipment, energy and manpower required by processes such as molding and cross-linking is also high. Cross-linked polyethylene insulation is a thermosetting plastic, which is difficult to recycle after retirement;

[0004] Disadvantages of polyvinyl chloride insulated cable: because it contains a large amount of chlorine element, a large amount of smoke will be emitted when it burns, which will cause people to suffocate, affect visibility, and produce some carcinogenic substances and HCl gas, causing serious harm to the environment. The cable insulation has poor acid and alkali resistance, heat oil resistance, and organic solvent resistance, according to the chemical principle of similar dissolves similar, the wire is easy to break and crack in a specific environment.

[0005] The present application proposes to develop an energy-saving and environment-friendly polypropylene insulated high-voltage cable for new energy power generation, which is mainly used for long-distance power transmission between the box-type transformer of the wind power plant and the booster station of the photovoltaic power plant. SUMMARY

[0006] In view of the shortcomings of the prior art, the present application provides an insulation high-voltage cable for new energy power generation and an end head welding method thereof, which achieves the purpose of solving the above problems.

[0007] To achieve the above purpose, the present application realizes the following technical scheme: an insulation high-voltage cable for new energy power generation, comprising a copper conductor and a halogen-free low-smoke flame-retardant polyolefin sheath, the copper conductor is sequentially provided with a polypropylene inner shield, a polypropylene insulation, a polypropylene outer shield, a copper alloy tape shield, a semi-conductive tape, a semi-conductive copper plastic tape, and a semi-conductive polyolefin inner sheath in the outward direction.

[0008] The inner wall of the halogen-free low-smoke flame-retardant polyolefin sheath is sequentially provided with a polyethylene sheath, an aluminum alloy strip, a flat aluminum alloy wire armor, a polyethylene isolation sleeve and a filler, and a semi-conductive polyolefin sheath is arranged inside the filler.

[0009] A new energy power generation insulation high-voltage cable end welding method, comprising the following steps:

[0010] S1, the surface of the two cables is simply cleaned, then the cable end is inserted into the welding port of the welding machine after being straightened;

[0011] S2, then start the welding machine, and high-temperature weld the part of the cable end exposed in the welding port into one through the high-temperature welding port, so as to complete the welding of the cable end;

[0012] S3, after the welding is completed, wait for a period of time, and then take out the two connected cables from the welding port after they are slightly cooled, to complete the overall welding work.

[0013] Preferably, one side of the welding port is arranged on the outer wall of the welding machine, and the outer wall of the welding machine is provided with a limiting mechanism;

[0014] The limiting mechanism comprises:

[0015] A fixed sleeve, which is a circular sleeve structure, is fixedly connected to one side of the outer wall of the welding machine, and one side of the fixed sleeve is fixedly connected with a hinged block, the inner wall of the hinged block is rotatably connected with a rotating shaft, and the fixed sleeve is used to fix the hinged block;

[0016] A hinged rod is hingedly connected to the hinged block at one end through the rotating shaft, and the other end of the hinged rod is fixedly connected with a connecting block, and the outer wall of the connecting block is fixedly connected with a round block.

[0017] Preferably, the round block is a circular disc structure, one end of the rotating shaft is fixedly connected with a baffle, one side of the baffle is fixedly connected with a torsional spring, and one end of the torsional spring is fixedly connected with one side of the hinged block.

[0018] Preferably, the outer wall of the hinged rod is fixedly connected with a first sliding plate, the outer wall of the first sliding plate is slidably connected with a second sliding plate, the outer wall of the second sliding plate is slidably connected with a sliding sleeve, the inner wall of the sliding sleeve is slidably connected with a third sliding plate, the inner wall of the third sliding plate is slidably connected with a fourth sliding plate, and one end of the fourth sliding plate is fixedly connected with the outer wall of the welding port.

[0019] Preferably, one end of the first sliding plate is provided with a cooling mechanism, the cooling mechanism comprises a telescopic rod, one end of the telescopic rod is hingedly connected with a connecting plate through a rotating shaft, one end of the connecting plate is fixedly connected with a heat conduction plate, and the inner wall of the telescopic rod is provided with a second spring.

[0020] Preferably, the outer wall of the heat conduction plate is provided with a heat dissipation groove, the outer wall of the telescopic rod is fixedly connected with an arc-shaped plate through a connecting column, one side of the arc-shaped plate is fixedly connected with a gas injection port, the inner wall of the telescopic rod is in communication with the inside of the sliding sleeve through the first sliding plate and the second sliding plate, the inside of the telescopic rod is in communication with the inside of the gas injection port through the connecting column and the arc-shaped plate, and the inside of the gas injection port is provided with a pressure valve.

[0021] Preferably, the outer wall of the sliding sleeve is provided with a one-way air inlet valve, the one-way air inlet valve is a one-way air inlet valve, the inner wall of the sliding sleeve is slidably connected with a lifting block, the outer wall of the lifting block is provided with a scale groove, the bottom of the lifting block is fixedly connected with a first spring, and one end of the first spring is fixedly connected with the inner wall of the sliding sleeve.

[0022] The application provides a new energy power generation insulation high-voltage cable and an end welding method thereof, and has the following beneficial effects:

[0023] 1. The conductor material is high-conductivity oxygen-free copper rod, the conductor structure adopts inner-layer circular monofilament and outer-layer tile-shaped monofilament, and the production process adopts non-tight pressing and twisting technology, so that the conductive performance is good and the line loss is small.

[0024] 2. The inner shielding, outer shielding and insulation adopt non-crosslinked thermoplastic polypropylene material, the production process adopts three-layer co-extrusion, non-crosslinking, pressure maintaining, air cooling and water cooling technology, has good electrical performance, mechanical performance and anti-aging performance, and saves production energy consumption; the inner shielding material and the outer shielding material adopt polypropylene as the main base material, add conductive carbon black and other various additives, and are granulated by melting; and the insulation material adopts polypropylene as the main base material, adds various additives, and is granulated by melting and modification.

[0025] 3. The shielding composite inner sheath adopts copper alloy tape, semi-conductive tape, semi-conductive copper plastic tape and semi-conductive polyolefin sheath material, and the production process adopts synchronous wrapping of copper alloy tape and semi-conductive tape, sol longitudinal wrapping of semi-conductive copper plastic tape, semi-extrusion pipe type extrusion wrapping inner sheath and segmented cooling process, and the longitudinal wrapping and the extrusion wrapping are carried out in line and synchronously, so that the shielding performance, flow guiding performance and waterproof performance are good.

[0026] 4. The isolation sleeve is made of polyethylene sheath material. The production process adopts semi-extrusion tube extrusion and segmented cooling process, which has good mechanical properties and waterproof performance. The armor uses flat aluminum alloy wire and aluminum alloy strip. The production process involves wrapping the flat aluminum alloy wire bundle around the surface of the isolation sleeve, and then using aluminum alloy strip to tie it to the surface of the flat aluminum alloy wire in the opposite direction. It has longitudinal tensile strength and radial compressive strength. The outer sheath is made of polypropylene lace tape, polyethylene sheath, and halogen-free low-smoke flame-retardant polyolefin sheath material. The production process adopts three polypropylene lace tapes for flat dragging, semi-extrusion tube double-layer extrusion of the outer sheath, and segmented cooling process. Flat dragging and extrusion are carried out online synchronously one after the other, which has good mechanical properties, waterproof performance, and halogen-free low-smoke flame-retardant performance.

[0027] 5. By setting a limiting mechanism, the two cables on both sides of the welding joint are firmly clamped, thus preventing them from falling off during the welding process. At the same time, this direct-insertion welding clamping method can improve its working efficiency and make the operation quick. The way the round block is slightly outward to fix the cable can help keep the part between the round block and the welding joint taut, avoiding the problem of the cable being dragged down by gravity during high-temperature welding, which would cause the welding position to be twisted and affect the welding accuracy.

[0028] 6. By setting up a cooling mechanism, the heat-conducting plate is pushed by the rotating shaft and connecting plate. When the heat-conducting plate is pushed, it moves closer to the outer wall of the cable and fits against the outer wall of the cable. This allows the heat-conducting plate to quickly conduct heat to the high temperature generated during welding at the cable end during the subsequent welding process, reducing the temperature around the cable end and preventing the high temperature at the welding point from extending to other parts of the end, which would cause various insulation layers to deform and age.

[0029] 7. By setting up a cooling mechanism, the heat-conducting plate is not pushed out directly and blocks the direction of cable movement when the cable is first pushed away from the round block. The heat-conducting plate is slowly expanded by the telescopic rod to press against the outer wall of the cable after the cable is fully inserted into the welding joint. This ensures that even if the operator is not skilled, there is enough time for them to put the cable into the welding joint and then for the heat-conducting plate to fit. This achieves stable clamping and cooling during welding, while also ensuring the safety and stability of the operation and avoiding accidents caused by operational errors.

[0030] 8. By setting up a cooling mechanism, the heat-conducting plate automatically adheres to the cable end and is integrated with the clamping mechanism, enabling integrated operation without the need for separate cooling and heat dissipation operations. It is integrated into the relevant clamping structure, occupies little space, does not affect storage and transportation, and is easy to operate and use.

[0031] 9、Through setting cooling mechanism, utilize one jet port to correspond one heat dissipation recess position relation, make the heat that heat conduction plate absorbs from cable surface evenly spread outward, guarantee the sustained high efficiency cooling effect of cable, guarantee the sealing of all kinds of sealing layer in cable to reduce the influence as far as possible, guarantee the insulation of cable whole.

[0032] 10、Through setting cooling mechanism, the staff can judge the lifting position of lifting block by observing scale groove, so as to judge the time passed and how much gas in the sliding sleeve can continue to be sprayed through the jet port to ensure the stability of cooling and heat dissipation, so that the staff can observe the current working state in time through this way, and can adjust the corresponding strategy in time according to the obtained information, to ensure the coordination and stability of welding processing and other related work. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is the structure schematic diagram of the present application;

[0034] Figure 2 It is the structure schematic diagram of the cable of the present application;

[0035] Figure 3 It is the structure schematic diagram of the limiting mechanism of the present application Figure 1 ;

[0036] Figure 4 It is the structure schematic diagram of the limiting mechanism of the present application Figure 2 ;

[0037] Figure 5 It is the structure schematic diagram of the limiting mechanism of the present application Figure 3 ;

[0038] Figure 6 It is the enlarged view of A of the present application Figure 3 ;

[0039] Figure 7 It is the structure schematic diagram of the limiting mechanism of the present application;

[0040] Figure 8 It is the enlarged view of B of the present application Figure 5 ;

[0041] Figure 9 It is the structure schematic diagram of the cooling mechanism of the present application Figure 1 ;

[0042] Figure 10 It is the structure movement schematic diagram of the limiting mechanism of the present application Figure 1 ;

[0043] Figure 11 It is the structure movement schematic diagram of the limiting mechanism of the present applicationFigure 2 ;

[0044] Figure 12 For the invention Figure 5 Enlarged view at C;

[0045] Figure 13 For the structure of the cooling mechanism of the invention Figure 2 ;

[0046] Figure 14 For the structure of the arc-shaped plate of the invention

[0047] Figure 15 For the structure of the cooling mechanism of the invention

[0048] In the figure: 1 welding machine, 2 cable, 3 limit mechanism, 300 fixed sleeve, 301 hinged block, 302 baffle, 303 torsional spring, 304 hinged rod, 306 connecting block, 307 round block, 308 first sliding plate, 309 second sliding plate, 310 sliding sleeve, 311 third sliding plate, 312 fourth sliding plate, 4 cooling mechanism, 401 telescopic rod, 402 rotating shaft, 403 connecting plate, 404 heat-conducting plate, 405 reset torsional spring, 406 arc-shaped plate, 407 air jet, 408 heat dissipation groove, 409 lifting block, 410 scale groove, 411 one-way air inlet valve, 412 connecting column, 5 welding port, 6 copper conductor, 7 polypropylene inner shield, 8 polypropylene insulation, 9 polypropylene outer shield, 10 copper alloy tape shield, 11 semi-conductive tape, 12 semi-conductive copper plastic tape, 13 semi-conductive polyolefin inner sheath, 14 filler, 15 polyethylene isolation sleeve, 16 flat aluminum alloy wire armor, 17 aluminum alloy tape, 18 polypropylene ribbon, 19 polyethylene sheath, 20 halogen-free low-smoke flame-retardant polyolefin sheath. DETAILED DESCRIPTION

[0049] Example one: please refer to Figures 1-4 , the invention provides a technical scheme: a new energy power generation insulated high-voltage cable, including copper conductor 6 and halogen-free low-smoke flame-retardant polyolefin sheath 20, the outer direction of copper conductor 6 is sequentially provided with polypropylene inner shield 7, polypropylene insulation 8, polypropylene outer shield 9, copper alloy tape shield 10, semi-conductive tape 11, semi-conductive copper plastic tape 12, semi-conductive polyolefin inner sheath 13;

[0050] The inner wall direction of the halogen-free low-smoke flame-retardant polyolefin sheath 20 is sequentially provided with the polyethylene sheath 19, the aluminum alloy tape 17, the flat aluminum alloy wire armor 16, the polyethylene isolation sleeve 15, the filler 14, the semi-conductive polyolefin sheath semi-conductive polyolefin inner sheath 13 is arranged in the filler 14, the polyethylene sheath 19 and the aluminum alloy tape 17 are provided with the polypropylene ribbon 18, the polyethylene isolation sleeve 15, the flat aluminum alloy wire armor 16, the aluminum alloy tape 17, the polypropylene ribbon 18, the polyethylene sheath 19, the halogen-free low-smoke flame-retardant polyolefin sheath 20 form a cable 2;

[0051] Compared with traditional cables, the advantages are as follows:

[0052] 1. Low conductor resistivity, high current carrying capacity, and low line loss; 2. The extrusion production process of inner shielding, insulation, and outer shielding does not require pressurization, heating, or cross-linking, saving gas and electricity; 3. The production process of insulated wire cores does not require stopping for degassing, improving production efficiency and shortening product delivery cycle; 4. Double shielding with copper alloy strip and semi-conductive copper-plastic strip provides excellent shielding effect and current conductivity; 5. Multiple protections from semi-conductive copper-plastic strip, inner sheath, isolation sleeve, and outer sheath provide good waterproof performance; 6. Flat aluminum alloy wire armor provides dual protection against tensile and compressive forces; 7. The outer sheath is crack-resistant, waterproof, halogen-free, low-smoke, flame-retardant, and environmentally friendly; 8. The insulation layer, inner sheath, isolation sleeve, and outer sheath are all made of thermoplastic materials, which are biodegradable, recyclable, and environmentally friendly.

[0053] A method for welding the ends of insulated high-voltage cables used in new energy power generation includes the following steps:

[0054] S1. Clean the surfaces of the two cables 2, straighten them, and insert the ends of the cables 2 into the welding ports 5 inside the welding machine 1.

[0055] S2. Then start the welding machine 1. Through high-temperature welding in the welding port 5, the parts of the two cables 2 exposed in the welding port 5 are welded together at high temperature, thereby completing the welding of the ends of the cables 2.

[0056] S3. After welding, wait for a while to allow it to cool slightly, then pull the two connected cables 2 out of the welding joint 5 to complete the overall welding process.

[0057] Example 2: Please refer to Figures 1-11 Based on Embodiment 1, the present invention provides a technical solution: During the welding process, due to the lack of stable fixing measures for the cable, the cable is easily detached from the welding joint due to external forces (such as accidental touch by the operator, slight vibrations that may be generated by the welding machine itself, etc.), resulting in welding interruption. It is necessary to reinsert the cable and adjust its position to weld again. This not only reduces work efficiency and increases operation time and labor intensity, but also the repeated re-welding may affect the quality and reliability of cable welding.

[0058] Meanwhile, during the welding process, the cable will naturally sag due to the lack of good fixed support, especially at high temperature welding, the sagging state of the cable may cause the welding position to be twisted, thereby affecting the welding precision, causing the cable connection after welding to appear virtual welding, false welding and other problems, reducing the quality and stability of the cable connection, bringing safety hazards to subsequent use, therefore, the welding port 5 side is arranged on the outer wall of the welding machine 1, and the outer wall of the welding machine 1 is provided with a limiting mechanism 3;

[0059] The limiting mechanism 3 comprises:

[0060] The fixed sleeve 300 is a circular sleeve structure, one side of the fixed sleeve 300 is fixedly connected with the outer wall of the welding machine 1, and one side of the fixed sleeve 300 is fixedly connected with the hinge block 301, and the hinge block 301 is rotatably connected with the rotating shaft on the inner wall.

[0061] The hinge rod 304 is hingedly connected with the hinge block 301 through the rotating shaft at one end, and the other end of the hinge rod 304 is fixedly connected with the connecting block 306, and the outer wall of the connecting block 306 is fixedly connected with the round block 307.

[0062] The round block 307 is a circular disc structure, one end of the rotating shaft is fixedly connected with the baffle 302, one side of the baffle 302 is fixedly connected with the torsional spring 303, and one end of the torsional spring 303 is fixedly connected with one side of the hinge block 301.

[0063] The outer wall of the hinge rod 304 is fixedly connected with the first sliding plate 308, the outer wall of the first sliding plate 308 is slidably connected with the second sliding plate 309, the outer wall of the second sliding plate 309 is slidably connected with the sliding sleeve 310, the inner wall of the sliding sleeve 310 is slidably connected with the third sliding plate 311, the inner wall of the third sliding plate 311 is slidably connected with the fourth sliding plate 312, and one end of the fourth sliding plate 312 is fixedly connected with the outer wall of the welding port 5.

[0064] In use, the two cables 2 are connected to the welding port 5 in the welding machine 1, and then the welding machine 1 is started, and the high-temperature welding in the welding port 5 is used to weld the exposed part of the two cable 2 end portions in the welding port 5 into one body, thereby completing the welding of the cable 2 end portions;

[0065] When the two cables 2 are inserted into the welding port 5, the end portions of the cables 2 will first abut against the round blocks 307 on the three hinge rods 304, and since the round blocks 307 are circular disc structures, when abutting against the three round blocks 307, the three round blocks 307 will be pushed outward, and the round blocks 307 drive the hinge rods 304 to rotate on the rotating shaft, and the rotating shaft is rotatably connected in the hinge block 301.

[0066] When the articulated rod 304 rotates with the rotating shaft and the baffle 302, the torsional spring 303 will be twisted, and the rebound force of the torsional spring 303 will apply a torsional force to the rotating shaft and the articulated rod 304 to reset them, so that when the cable 2 that pushes away the three round blocks 307 continues to push inward into the welding port 5, the round blocks 307 will firmly clamp the outer wall of the cable 2 and firmly clamp the two cables 2 on both sides of the welding port 5, thereby preventing the problem of falling off during welding, and the straight insertion type welding clamping integrated manner is beneficial to improve the work efficiency and is fast to operate, and the way that the position of the round block 307 is slightly outward to fix the cable 2 can be beneficial to keep the position between the round block 307 and the welding port 5 in a straight state, avoiding the problem that the welding position is twisted to affect the welding precision due to the cable 2 being dragged downward by gravity during high-temperature welding;

[0067] Embodiment three: please refer to Figures 1-15 On the basis of the first and second embodiments, the application provides a technical solution: during the welding of the cable, the high temperature generated by welding will seriously affect the various types of heat preservation and insulation layers around the cable end, and as the welding proceeds, the high temperature will gradually extend to positions outside the cable end, causing the heat preservation and insulation layers at these positions to deform and age. Once the heat preservation and insulation layers deform and age, their insulation performance will decrease significantly, making the cable prone to safety hazards such as electric leakage and short circuit during use, seriously affecting the normal use and safety of the cable.

[0068] Although there are some cooling measures at present, there are many problems. For example, some cooling equipment needs to be started and operated separately, which is complex to operate and increases the work burden of workers, and is independent of welding clamping and other operations, making it difficult to achieve integrated operation and reducing work efficiency. In addition, part of the cooling structure occupies a large space, affecting the storage and moving of the welding equipment, and bringing inconvenience to actual use. At the same time, the existing cooling method often cannot well control the timing and effect of cooling, and if the cooling equipment starts too early when the cable is inserted into the welding port, it may block the direction of the cable, affecting the operation; if it starts too late, it cannot cool the welding part in time, causing damage to the heat preservation and insulation layer. Moreover, the existing cooling structure cannot guarantee the continuous and efficient cooling of the cable, and cannot effectively resist the high temperature of the welding part, so as to well guarantee the sealing of various sealing layers in the cable, and affect the overall insulation and power transmission effect of the cable. Therefore, the first sliding plate 308 is provided with a cooling mechanism 4, and the cooling mechanism 4 comprises a telescopic rod 401, one end of the telescopic rod 401 is hinged with a connecting plate 403 through a rotating shaft 402, one end of the connecting plate 403 is fixedly connected with a heat conduction plate 404, and the inner wall of the telescopic rod 401 is provided with a second spring.

[0069] The outer wall of the heat conduction plate 404 is provided with a heat dissipation groove 408, the outer wall of the telescopic rod 401 is fixedly connected with an arc-shaped plate 406 through a connecting column 412, one side of the arc-shaped plate 406 is fixedly connected with a gas jet port 407, the inner wall of the telescopic rod 401 is in communication with the inside of the sliding sleeve 310 through the first sliding plate 308 and the second sliding plate 309, the inside of the telescopic rod 401 is in communication with the inside of the gas jet port 407 through the connecting column 412 and the arc-shaped plate 406, and the inside of the gas jet port 407 is provided with a pressure valve.

[0070] The outer wall of the sliding sleeve 310 is provided with a one-way air inlet valve 411, the one-way air inlet valve 411 is a one-way air inlet valve, the inner wall of the sliding sleeve 310 is slidably connected with a lifting block 409, the outer wall of the lifting block 409 is provided with a scale groove 410, the bottom of the lifting block 409 is fixedly connected with a first spring, and one end of the first spring is fixedly connected with the inner wall of the sliding sleeve 310.

[0071] After the hinged rod 304 is pushed away, the first sliding plate 308, the second sliding plate 309, the sliding sleeve 310, the third sliding plate 311 and the fourth sliding plate 312 are synchronously pushed to slide and stretch, so that the first sliding plate 308 and the second sliding plate 309 and the third sliding plate 311 and the fourth sliding plate 312 are retracted into the sliding sleeve 310 and press the air in the sliding sleeve 310 into the telescopic rod 401, so that the telescopic rod 401 is elongated, the heat conduction plate 404 is pushed by the rotating shaft 402 and the connecting plate 403, and when the heat conduction plate 404 is pushed, it approaches the outer wall of the cable 2 and is attached to the outer wall of the cable 2, so that in the subsequent welding process, the heat conduction plate 404 can quickly conduct heat generated during welding of the cable 2 end, reduce the temperature around the cable 2 end, avoid the high temperature of the welding position extending to the position outside the end, and cause deformation and aging of various heat preservation and insulation layers;

[0072] The aperture of the telescopic rod 401 is limited and communicates with the inside of the first sliding plate 308, so when the hinged rod 304 is just pushed to lift and push the first sliding plate 308 to squeeze the air inside the sliding sleeve 310, the air inside the sliding sleeve 310 cannot directly enter the telescopic rod 401, but a higher air pressure is formed inside the sliding sleeve 310 to lift the lifting block 409, which pulls the first built-in spring between the sliding sleeve 310 and makes it deform, and the deformed first built-in spring always maintains the elastic force to pull back the lifting block 409, maintains the continuous high air pressure inside the sliding sleeve 310, and allows the air inside the sliding sleeve 310 to continuously enter the telescopic rod 401 through the first sliding plate 308, so that the telescopic rod 401 expands slowly, thereby realizing that when the cable 2 just pushes away the circular block 307, the heat conduction plate 404 will not be directly pushed out to block the forward direction of the cable 2, and the heat conduction plate 404 is slowly expanded by the telescopic rod 401 to resist the outer wall of the cable 2 after the cable 2 is completely inserted into the welding port 5, thereby ensuring that even if the operator is not skilled, there is enough time to put the cable 2 into the welding port 5 and then make the heat conduction plate 404 adhere to it, thereby completing the welding, stable clamping and cooling, and ensuring the safety and stability of the operation, avoiding accidents caused by operation errors;

[0073] The heat conduction plate 404 is integrally clamped around the cable 2, which can integrate the operation, does not need to start the corresponding cooling operation, and is integrated in the related structure of the clamping, occupies small space, does not affect storage and transportation, and is convenient to operate and use.

[0074] When the heat conduction plate 404 adheres to the outer wall of the cable 2, the lifting block 409 will continue to be pulled back to the sliding sleeve 310 by the elastic force of the spring, and the air inside the sliding sleeve 310 will continue to be squeezed into the telescopic rod 401 as the lifting block 409 is reset, and the telescopic rod 401 cannot continue to elongate because the heat conduction plate 404 adheres to the cable 2, so that the air pressure inside the telescopic rod 401 is communicated through the connecting column 412 and the arc plate 406, the jet port 407, the pressure valve inside the jet port 407 is opened, and a large amount of air is continuously sprayed outside through the jet port 407 with a very small caliber. Because the space inside the sliding sleeve 310 is large and the squeezed air is more, a large amount of air can be continuously sprayed outside from the inner wall of the jet port 407 for a long time, and the heat absorbed by the heat conduction plate 404 from the surface of the cable 2 is uniformly and outwardly dissipated by the positional relationship between one jet port 407 and one heat dissipation groove 408, thereby ensuring the continuous and efficient cooling effect of the cable 2, resisting the high temperature of the cable 2 end welding part, and ensuring that the sealing of various sealing layers in the cable 2 is affected as little as possible, thereby ensuring the overall insulation and power transmission effect of the cable 2.

[0075] And the lifting block 409 is constantly pulled back by the elastic force of the first built-in spring, and because the lifting block 409 is provided with a plurality of scale grooves 410 on one side, the staff can judge the lifting position of the lifting block 409 by observing the scale grooves 410, so as to judge the time passed and how much air in the sliding sleeve 310 can continue to be sprayed through the air outlet 407 to ensure stable cooling and heat dissipation, so that the staff can observe the current working condition in time through this way, and adjust the corresponding strategy in time according to the obtained information, to ensure the coordination and stability of welding and other related work;

[0076] And when the cable 2 is pulled out, the hinged rod 304 is reset by the elastic force of the torsional spring 303, and the lifting block 409 is reset by the elastic force of the first built-in spring, and the telescopic rod 401 is also reset by the second built-in spring inside, when the hinged rod 304 is reset, the air in the sliding sleeve 310 is supplemented into it through the one-way air inlet valve 411, giving the first sliding plate 308, the second sliding plate 309, the sliding sleeve 310, the third sliding plate 311, and the fourth sliding plate 312 the sliding reset air supply.

[0077] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change within the technical range disclosed by the present application according to the technical scheme and the inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A method for welding the ends of insulated high-voltage cables used in new energy power generation, characterized in that, Includes the following steps: S1. Clean the surface of the two cables (2) simply, straighten them, and insert the ends of the cables (2) into the welding port (5) inside the welding machine (1); S2. Then start the welding machine (1) and weld the parts of the two cables (2) exposed in the welding port (5) into one piece by high temperature welding, thereby completing the welding of the ends of the cables (2). S3. After welding, wait for a while to allow it to cool down slightly, then pull the two connected cables (2) out of the welding joint (5) to complete the overall welding process. The welding joint (5) is located on the outer wall of the welding machine (1), and a limit mechanism (3) is provided on the outer wall of the welding machine (1). The limiting mechanism (3) includes: The fixed sleeve (300) is a circular sleeve structure. One side of the fixed sleeve (300) is fixedly connected to the outer wall of the welding machine (1). A hinge block (301) is fixedly connected to one side of the fixed sleeve (300). A rotating shaft is rotatably connected to the inner wall of the hinge block (301). The fixed sleeve (300) is used to fix the hinge block (301). A hinge rod (304) is hinged at one end to a hinge block (301) via a rotating shaft. A connecting block (306) is fixedly connected to the other end of the hinge rod (304). A round block (307) is fixedly connected to the outer wall of the connecting block (306).

2. The welding method for the end of an insulated high-voltage cable for new energy power generation according to claim 1, characterized in that: The circular block (307) has a circular disc structure. A baffle (302) is fixedly connected to one end of the rotating shaft. A torsion spring (303) is fixedly connected to one side of the baffle (302). One end of the torsion spring (303) is fixedly connected to one side of the hinge block (301).

3. The welding method for the end of an insulated high-voltage cable for new energy power generation according to claim 2, characterized in that: The outer wall of the hinge rod (304) is fixedly connected to the first slide plate (308), the outer wall of the first slide plate (308) is slidably connected to the second slide plate (309), the outer wall of the second slide plate (309) is slidably connected to the slide sleeve (310), the inner wall of the slide sleeve (310) is slidably connected to the third slide plate (311), the inner wall of the third slide plate (311) is slidably connected to the fourth slide plate (312), and one end of the fourth slide plate (312) is fixedly connected to the outer wall of the welding joint (5).

4. The welding method for the end of an insulated high-voltage cable for new energy power generation according to claim 3, characterized in that: The first slide plate (308) is provided with a cooling mechanism (4) at one end. The cooling mechanism (4) includes a telescopic rod (401). One end of the telescopic rod (401) is hinged to a connecting plate (403) via a pivot (402). One end of the connecting plate (403) is fixedly connected to a heat-conducting plate (404). A second spring is provided on the inner wall of the telescopic rod (401).

5. The welding method for the end of an insulated high-voltage cable for new energy power generation according to claim 4, characterized in that: The outer wall of the heat-conducting plate (404) is provided with a heat dissipation groove (408). The outer wall of the telescopic rod (401) is fixedly connected to an arc plate (406) through a connecting column (412). An air jet (407) is fixedly connected to one side of the arc plate (406). The inner wall of the telescopic rod (401) is connected to the inside of the sliding sleeve (310) through the first sliding plate (308) and the second sliding plate (309). The inside of the telescopic rod (401) is connected to the inside of the air jet (407) through the connecting column (412) and the arc plate (406). A pressure valve is provided inside the air jet (407).

6. The welding method for the end of an insulated high-voltage cable for new energy power generation according to claim 5, characterized in that: A one-way air intake valve (411) is provided on the outer wall of the sliding sleeve (310). The one-way air intake valve (411) is a one-way air intake valve. A lifting block (409) is slidably connected to the inner wall of the sliding sleeve (310). A scale groove (410) is provided on the outer wall of the lifting block (409). A first spring is fixedly connected to the bottom of the lifting block (409). One end of the first spring is fixedly connected to the inner wall of the sliding sleeve (310).

7. A high-voltage insulated cable for new energy power generation, based on the end welding method of the high-voltage insulated cable for new energy power generation according to claim 1, comprising a copper conductor (6) and a halogen-free, low-smoke, flame-retardant polyolefin sheath (20), characterized in that: The copper conductor (6) is provided with polypropylene inner shield (7), polypropylene insulation (8), polypropylene outer shield (9), copper alloy tape shield (10), semi-conductive tape (11), semi-conductive copper-plastic tape (12), and semi-conductive polyolefin inner sheath (13) in sequence on the outer side; the halogen-free low-smoke flame-retardant polyolefin sheath (20) is provided with polyethylene sheath (19), aluminum alloy tape (17), flat aluminum alloy wire armor (16), polyethylene isolation sleeve (15), and filler (14) in sequence on the inner wall. The semi-conductive polyolefin sheath (13) is located inside the filler (14). Polypropylene tie tape (18) is provided between the polyethylene sheath (19) and the aluminum alloy tape (17). The polyethylene isolation sleeve (15), flat aluminum alloy wire armor (16), aluminum alloy tape (17), polypropylene tie tape (18), polyethylene sheath (19), and halogen-free low-smoke flame-retardant polyolefin sheath (20) form the cable (2).

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