Semi-automatic processing equipment and method for improving crosslinking degree of insulating layer of power cable

Abstract

The invention relates to the technical field of cable manufacturing, in particular to semi-automatic processing equipment and method for improving the crosslinking degree of a power cable insulating layer, and the equipment comprises a crosslinking pipe, the bottom of the crosslinking pipe is provided with a base, one side of the base is provided with a motor, two sides of the base are provided with supports, and two sides of the crosslinking pipe are provided with guide cylinders. According to the device, nitrogen pressure can be subjected to multiple composite conversion and utilization in the cross-linking machining process of a cable insulation layer, a torque amplification structure can be formed, the load pressure of a motor is reduced, the pressure of the motor is reduced, and the reliability of the cable insulation layer is improved. The device can work more continuously and stably, provides more stable driving force for cooling water, realizes cyclic utilization of the cooling water, realizes independent regulation and control of the temperature of the cooling water, enables curing work of an insulating layer to be more rapid and balanced, provides more stable and flexible basic conditions for cross-linking work, and meets different processing requirements.

Description

Technical Field

[0001] This invention relates to the field of cable manufacturing technology, specifically to a semi-automatic processing equipment and method for improving the cross-linking degree of the insulation layer of power cables. Background Technology

[0002] Cross-linked polyethylene (XLPE) power cables, with their excellent electrical properties, heat resistance, and mechanical strength, have become the mainstream insulation material for medium and high voltage power cables. Their insulation layer is usually formed by chemical or physical cross-linking processes, which makes the polyethylene molecular chains form a three-dimensional network structure, thereby significantly improving the temperature resistance and long-term operational stability. A Chinese patent discloses a method for direct application in a multi-line continuous chemical cross-linked wire and cable production line, with application number CN202110660085.6. This allows workers to monitor the specific temperature of the liquid material and the extrusion pressure in real time, thereby improving the ease of use of the equipment. However, the current process of cross-linking the insulation layer of cables not only consumes a large amount of cooling water, but also causes the insulation layer to heat up due to the absorption of heat from the insulation layer. This results in uneven axial heating of the cable insulation layer, affecting the surface curing stability of the insulation layer before cross-linking and the final curing stability after cross-linking, thus affecting the final cross-linking effect. Moreover, relying solely on the motor to provide driving force during the entire insulation cross-linking process not only results in high load pressure, affecting its continuous working stability, but also causes excessive energy consumption, failing to meet the requirements of energy conservation and emission reduction. Summary of the Invention

[0003] This invention provides a semi-automatic processing equipment for improving the cross-linking degree of power cable insulation layers. It can effectively solve the problems mentioned in the background art, such as the current cross-linking processing of cable insulation layers, which not only requires a large amount of cooling water, but also causes uneven axial heating of the cable insulation layer due to the cooling water absorbing heat from the insulation layer, affecting the surface curing stability of the insulation layer before cross-linking and the final curing stability after cross-linking, thus affecting the final cross-linking effect. Moreover, relying solely on the motor to provide driving force during the entire insulation cross-linking process not only results in high load pressure, affecting its continuous working stability, but also causes excessive energy consumption, failing to meet the requirements of energy conservation and emission reduction.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a semi-automatic processing equipment for improving the crosslinking degree of power cable insulation layer, comprising a crosslinking tube, a base installed at the bottom of the crosslinking tube, a motor installed on one side of the base, supports installed on both sides of the base, guide cylinders installed on both sides of the crosslinking tube, a water tank installed at the bottom of the guide cylinder, and a synchronous shaping mechanism installed on the outside of the water tank; The synchronous shaping mechanism includes a housing; A housing is installed on the side end face of the support. A drive rod is rotatably installed on the end of the housing. A piston is symmetrically installed on the outside of the drive rod via threads. Water valves are symmetrically installed on the top and bottom ends of the housing. A guide box is installed on the top of the housing. Branch pipes are connected to both sides of the guide box. Heat exchange tubes are symmetrically arranged on both sides of the housing. A regulating valve and a main pipe are respectively connected to both ends of the heat exchange tubes. A drain pipe is connected to the bottom of the outer curved surface of the guide tube. A suction pipe is connected to the bottom of the side end face of the water tank. A driven wheel is installed at the end of the drive rod, a shaft is rotatably installed at the end of the base, a drive wheel is installed at both ends of the shaft, a rotating wheel is symmetrically installed on the outer curved surface of the shaft, and an exhaust pipe is connected to the top of one side of the outer curved surface of the crosslinking tube.

[0005] Preferably, a rotating cylinder is rotatably installed inside the guide cylinder, and the rotating cylinder and the guide cylinder form a clamping cavity. A plurality of atomizing nozzles are evenly and equidistantly installed on the inner wall of the rotating cylinder. A hollow wheel is installed at the end of the rotating cylinder, and an opening is provided at the top of the inner wall of the guide cylinder between the clamping cavity and the hollow wheel. A sleeve is fitted around the outside of the heat exchange tube. Pilot valves are symmetrically installed on both ends of the box. A three-way pipe is connected to the end of the pilot valve. An insert is installed inside the heat exchange tube. Several side openings are opened at equal angles along the circumferential direction on one side of the outer wall of the insert. A pressure relief valve is installed at the end of one insert. A connecting pipe is connected to the end of the pressure relief valve.

[0006] Preferably, the water valves are connected to the spaces on both sides of a piston, and the flow direction of each water valve is from the bottom of the box to the top of the box. The guide box is connected to the water valve at the top of the box, the suction pipe is connected to the water valve at the bottom of the box, the heat exchange tube is spiral, and the two heat exchange tubes are connected to two branch pipes through the regulating valves at their ends.

[0007] Preferably, the motor output shaft is connected to the shaft rod, the driven wheel is connected to the driving wheel through gear teeth, and the radius of the driving wheel is smaller than that of the driven wheel. The drive rod is composed of two reciprocating lead screws connected in series, and the chambers containing the two pistons inside the housing are not connected.

[0008] Preferably, the end of the main pipe is connected to the bottom of the chamber where the hollow wheel is located, and the top of the chamber where the hollow wheel is located is connected to the clamping cavity through a port. The clamping cavity is connected to the atomizing nozzle, and the bottom of the guide tube is connected to the water tank through a leak pipe. The water tank is filled with clean water.

[0009] Preferably, the pilot valves at the ends of the three-way pipe are respectively connected to the spaces on both sides of the other piston, and the ends of the three-way pipe are connected to the sleeve. The flow direction of the pilot valves is towards the side of the insertion tube where the pressure relief valve is installed, and the two insertion tubes are connected through the pressure relief valve and the connecting pipe. The sleeve is filled with tetrafluoroethane in a gas-liquid equilibrium state.

[0010] Preferably, a dynamic cross-linking mechanism is installed on the top of the support; The dynamic cross-linking mechanism includes an air-blocking tube; Both ends of the crosslinking tube are equipped with air-blocking tubes. A variable diameter sleeve is installed inside the air-blocking tube. Several ring boxes are evenly embedded in the outer wall of the air-blocking tube at equal intervals. An electromagnetic heating coil is embedded in the outer wall of the crosslinking tube. A wall shell is embedded inside the crosslinking tube. A guide ring is installed at one end of the wall shell. A through hole is opened on the side end face of the guide ring. A winding plate is wound around the outside of the guide ring. An air inlet tube is connected to the bottom of the other side of the outer curved surface of the crosslinking tube. A threaded sleeve is fitted on the outer side of the shaft between the two rotating wheels. A sliding plug is installed on the outer side of the threaded sleeve via threads. A suction valve is symmetrically installed on one side end face of the base at both sides of the sliding plug. A tube is installed at the end of the suction valve. An air outlet pipe is symmetrically connected to the outer curved surface of the tube at both sides of the suction valve. Negative pressure pipes are connected to both ends of the tube. A shut-off valve is connected to the end of the negative pressure pipe. An exhaust valve is installed on the other side of the base at the position corresponding to the intake valve. The end of the exhaust valve is connected to a manifold, and the end of the manifold is connected to a flow divider. A throttle valve is installed on the top of the side face of the flow divider, and the end of the throttle valve is connected to a bypass pipe. An exhaust valve is installed on one side of the base. A pressure sensor is installed on the top of the outer curved surface of the ring box, and a temperature and pressure transmitter is installed on one side of the top of the crosslinking pipe.

[0011] Preferably, the outer thread of the threaded sleeve is a reciprocating thread, the chamber where the sliding plug is located is not connected to the chamber where the rotating wheel is located, the exhaust pipe and the air supply valve are respectively connected to the chambers where the two rotating wheels are located, and the chambers where the two rotating wheels are located are connected to the cylinder through the air outlet pipe, the bypass pipe is connected to the outermost ring box of the two air blocking pipes, and the remaining ring boxes are respectively connected to the negative pressure pipe through the on / off valve, and the diverter box is connected to the chamber where the winding plate is located through the air inlet pipe.

[0012] Preferably, the variable diameter sleeve has several variable diameter sections evenly spaced on its sidewalls, and the variable diameter sleeve has several slots at equal angles along the circumference on both sides of the variable diameter section, with the slots located inside the ring box. The cavity formed by the wall shell and the crosslinking tube is connected to the outer space of the guide ring through a through hole. The sidewall of the shell is provided with several guide grooves at equal angles along the circumference. The guide grooves and the winding plate are both spiral. The gas supply valve and the on / off valve are both solenoid valves. The pressure sensor and the temperature and pressure transmitter are both connected to an external controller. The electromagnetic heating coil, the gas supply valve, the on / off valve, the pressure sensor, the temperature and pressure transmitter, and the motor input terminal are all electrically connected to the external power supply output terminal.

[0013] Preferably, a semi-automatic processing method for improving the crosslinking degree of power cable insulation includes the following steps: S1. Place the cross-linking tube and the matching dynamic cross-linking mechanism and synchronous shaping mechanism in the work area, align them with the external extrusion head, and pull the cable traction rope from the pre-extrusion process to complete the initial traction and guidance work. S2. Connect the gas supply valve to an external nitrogen supply device. By driving the clean water to circulate, controllable quenching is performed on the surface of the cable insulation layer to form a dense condensed shell on its surface, while keeping its internal temperature above 135°C, in a molten state. S3, a tetrafluoroethane circulating gas-liquid conversion, heats and cools the clean water inside the two heat exchange tubes respectively, and adjusts the regulating valve to control the temperature of the water mist sprayed at the atomizing nozzle; S4. Nitrogen gas presses the inclined surface of the impeller, forming a combined force with the motor to compensate for the pressure. It also flows directionally inside and outside the cross-linking tube. Under the action of the magnetic field generated by the electromagnetic heating coil, the shell heats up under the action of eddy currents, providing a more stable cross-linking environment for the cable insulation layer. S5. Under pressure, some nitrogen will overflow into the reducing sleeve, forming three nitrogen barriers to provide a buffer for nitrogen and prevent external air from entering the reducing sleeve. The pressure increases from the outside to the cross-linking pipe side, preventing nitrogen from mixing with external air. S6. The cable enters the guide tube on the other side, where the water mist sprayed by the atomizing nozzles cools and solidifies it. By adjusting the opening of the regulating valve, the temperature of the water mist sprayed by the atomizing nozzles inside the two guide tubes can be independently limited.

[0014] Compared with the prior art, the advantages of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use; 1. Equipped with a synchronous shaping mechanism, the synchronous transmission structure is formed by the cooperation of the housing, drive rod, piston, driven wheel, shaft, driving wheel, rotating wheel and exhaust pipe. This fully utilizes the nitrogen pressure during the cross-linking process of the cable insulation layer and forms a torque amplification structure to amplify the driving force, which can significantly reduce the motor load pressure. While reducing energy consumption, it ensures that the motor can operate more continuously and efficiently. With the flow-limiting and guiding function of water valve, guide box, branch pipe, heat exchange pipe, main pipe, drain pipe and extraction pipe, the water flow can be directed. This not only promotes the curing of the insulation layer surface before the cross-linking work to form an ideal state of external solidification and internal melting, but also promotes the final curing of the insulation layer after the cross-linking is completed. It can simultaneously meet the different curing requirements during the cross-linking process of the cable insulation layer and realize the recycling of water flow, reducing the consumption of cooling water during the cable processing. With the transmission action of the rotating drum, clamping cavity, hollow wheel, and through-hole, the water pressure can be utilized, effectively achieving secondary utilization of nitrogen pressure during the cross-linking process of cable insulation. This causes the atomizing nozzle to spray cooling water around the cable, stabilizing the cooling water pressure, reducing the impact on the cable, and making the surface curing of the cable insulation layer smoother. At the same time, it can make the circumferential heating of the cable insulation layer more balanced and stable. In addition, the flow-limiting and guiding effect of the sleeve, guide valve, tee pipe, insertion pipe, side port, pressure relief valve, and connecting pipe can promote the gas-liquid conversion of tetrafluoroethane circulation, forcing heat exchange with the cooling water. In addition, the regulating valve can not only dynamically control the cooling water temperature and maintain its stability, ensuring the consistency of the insulation layer cooling and curing process before and after, and ensuring the consistency of its radial cross-linking process, but also achieve independent limitation of the cooling water temperature sprayed inside the two guide cylinders, flexibly meeting the processing needs of different specifications of cables.

[0015] 2. Equipped with a dynamic cross-linking mechanism, the gas-blocking tube, the variable diameter sleeve, and the ring box work together to form a dynamic sealing structure. Combined with the guiding effect of the slot and the limiting and contracting effect of the variable diameter section, a multi-level nitrogen barrier can be built inside the gas-blocking tube, forming a dual isolation of mechanical and gaseous states. This not only forms a stable pressure gradient to prevent nitrogen leakage, but also provides a gentle pressure buffer gradient for the cable insulation layer, making it more stable in the high-pressure nitrogen environment during the cross-linking process. It can also firmly lock the high-pressure nitrogen in the cross-linking tube, preventing external oxygen from entering and providing a more stable gaseous environment for the cross-linking reaction of the cable insulation layer. With the guiding effect of the wall shell, guide ring, winding plate, and through hole, it can promote the nitrogen spiral to wrap around the cable, correct the cable position, and reduce the influence of gravity on the molten insulation layer. With the heating effect of the electromagnetic heating coil, the detection and feedback function of the pressure sensor and temperature and pressure transmitter, and the regulation function of the gas supply valve and the on / off valve, the temperature and pressure inside the cross-linking tube can be dynamically controlled. This provides more suitable temperature and pressure conditions for the cross-linking reaction of the cable insulation layer, improves the stability and reliability of the cross-linking reaction, and further enhances the degree of cross-linking. Through the guiding function of the inlet pipe, outlet pipe, suction valve, cylinder, outlet valve and manifold, nitrogen circulation can be promoted. A two-stage torque amplification structure can be formed between the impeller, threaded sleeve and sliding plug, which can further combine and utilize the nitrogen pressure, provide compensation pressure for nitrogen circulation, and further reduce the motor load pressure. At the same time, with the flow limiting and guiding function of the negative pressure pipe, flow divider box, throttle valve and bypass pipe, the ring box pressure can be synchronously and dynamically controlled, and the active nitrogen emission can be flexibly limited to fully meet the different pressure requirements in the cross-linking process.

[0016] In summary, by combining a synchronous setting machine and a dynamic cross-linking mechanism, nitrogen pressure can be utilized through multiple composite transformations during the cross-linking process of cable insulation. This can also create a torque amplification structure, reducing motor load pressure and enabling more continuous and stable operation. It provides a more stable driving force for cooling water, allowing for its recycling. While reducing water consumption, it enables forced heat exchange of the cooling water, allowing for independent temperature control. This results in more even curing of the insulation layer, providing a more stable and flexible foundation for cross-linking and meeting diverse processing needs. Furthermore, it promotes directional circulation of nitrogen, reducing the impact of gravity and ensuring more uniform cable heating. Multi-stage dynamic sealing is also possible, providing a more stable gaseous environment for cross-linking and improving the degree of cross-linking. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the crosslinking pipe installation structure of the present invention; Figure 3 This is a schematic diagram of the air-blocking tube installation structure of the present invention; Figure 4 This is a schematic diagram of the synchronous shaping mechanism of the present invention; Figure 5 This is a schematic diagram of the rotating drum mounting structure of the present invention; Figure 6 This is a schematic diagram of the base mounting structure of the present invention; Figure 7 This is a schematic diagram of the variable diameter sleeve installation structure of the present invention; Figure 8 This is a schematic diagram of the shunt box installation structure of the present invention; Figure 9 This is a schematic diagram of the ring box mounting structure of the present invention; Figure 10 This is a flowchart of the cross-linking process for the insulating layer of the present invention; The diagram is labeled as follows: 1. Crosslinking pipe; 11. Base; 12. Support; 13. Guide tube; 14. Water tank; 15. Motor; 20. Synchronous shaping mechanism; 201. Housing; 202. Drive rod; 203. Piston; 204. Water valve; 205. Guide box; 206. Branch pipe; 207. Heat exchange tube; 208. Regulating valve; 209. Main pipe; 210. Leakage pipe; 211. Extraction pipe; 212. Driven wheel; 213. Shaft; 214. Drive wheel; 215. Rotary wheel; 216. Exhaust pipe; 217. Rotary drum; 218. Clamping cavity; 219. Atomizing nozzle; 220. Hollow wheel; 221. Port; 222. Sleeve; 223. Pilot valve; 224. T-pipe; 225. Insert pipe; 226. Side port; 227. Pressure relief valve; 228. Connecting pipe; 30. Dynamic cross-linking mechanism; 301. Air-blocking tube; 302. Variable diameter sleeve; 303. Ring box; 304. Electromagnetic heating coil; 305. Wall shell; 306. Guide ring; 307. Winding plate; 308. Through hole; 309. Inlet pipe; 310. Threaded sleeve; 311. Sliding plug; 312. Intake valve; 313. Cylindrical tube; 314. Outlet valve; 315. Manifold; 316. Diverter box; 317. Throttling valve; 318. Bypass pipe; 319. Gas delivery valve; 320. Negative pressure pipe; 321. On / off valve; 322. Pressure sensor; 323. Temperature and pressure transmitter; 324. Outlet pipe; 31. Variable diameter section; 32. Groove opening; 33. Guide groove. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example: Figure 1-9 As shown, the present invention provides a technical solution, a semi-automatic processing equipment for improving the crosslinking degree of power cable insulation layer, including a crosslinking pipe 1, a base 11 installed at the bottom of the crosslinking pipe 1, a motor 15 installed on one side of the base 11, supports 12 installed on both sides of the base 11, guide cylinders 13 installed on both sides of the crosslinking pipe 1, a water tank 14 installed at the bottom of the guide cylinder 13, and a synchronous shaping mechanism 20 installed on the outside of the water tank 14. The synchronous shaping mechanism 20 includes a housing 201; A housing 201 is installed on the side end face of the support 12. A drive rod 202 is rotatably installed at the end of the housing 201. A piston 203 is symmetrically installed on the outside of the drive rod 202 via threads. Water valves 204 are symmetrically installed at the top and bottom of the housing 201. A guide box 205 is installed on the top of the housing 201. Branch pipes 206 are connected to both sides of the guide box 205. Heat exchange pipes 207 are symmetrically arranged on both sides of the housing 201. A regulating valve 208 and a main pipe 209 are connected to the two ends of the heat exchange pipes 207 respectively. A drain pipe 210 is connected to the bottom of the outer curved surface of the guide cylinder 13. A suction pipe 211 is connected to the bottom of the side end face of the water tank 14. Water valves 204 are connected to the spaces on both sides of a piston 203. The flow direction of each water valve 204 is from the bottom of the tank 201 to the top of the tank 201. The guide box 205 is connected to the water valve 204 at the top of the tank 201. The suction pipe 211 is connected to the water valve 204 at the bottom of the tank 201. The heat exchange tube 207 is spiral. The two heat exchange tubes 207 are connected to two branch pipes 206 through the regulating valves 208 at the ends to form a water circulation path. A driven wheel 212 is installed at the end of the drive rod 202, and a shaft 213 is rotatably installed at the end of the base 11. Both ends of the shaft 213 are equipped with driving wheels 214. The output shaft of the motor 15 is connected to the shaft 213. The driven wheel 212 is connected to the driving wheel 214 through gear teeth. The radius of the driving wheel 214 is smaller than the radius of the driven wheel 212. The drive rod 202 is composed of two reciprocating lead screws connected in series. The chambers containing the two pistons 203 inside the housing 201 are not connected to provide a stable driving force. A rotating wheel 215 is symmetrically mounted on the outer curved surface of the shaft 213, and an exhaust pipe 216 is connected to the top of one side of the outer curved surface of the crosslinking pipe 1.

[0021] A rotating cylinder 217 is rotatably installed inside the guide cylinder 13. The rotating cylinder 217 and the guide cylinder 13 enclose a clamping cavity 218. Several atomizing nozzles 219 are evenly installed on the inner wall of the rotating cylinder 217 at equal intervals. A hollow wheel 220 is installed at the end of the rotating cylinder 217. The end of the main pipe 209 is connected to the bottom of the chamber where the hollow wheel 220 is located. The top of the chamber where the hollow wheel 220 is located is connected to the clamping cavity 218 through a through-hole 221. The clamping cavity 218 is connected to the atomizing nozzles 219. The bottom of the guide cylinder 13 is connected to the water tank 14 through a drain pipe 210. The water tank 14 is filled with clean water to achieve stable cooling. An through-hole 221 is opened at the top of the inner wall of the guide cylinder 13 at the position between the clamping cavity 218 and the hollow wheel 220. A sleeve 222 is fitted around the outside of the heat exchange tube 207. Pilot valves 223 are symmetrically installed on both ends of the housing 201. A three-way pipe 224 is connected to the end of the pilot valve 223. An insert tube 225 is installed inside the heat exchange tube 207. Several side openings 226 are opened at equal angles along the circumference on one side of the outer wall of the insert tube 225. A pressure relief valve 227 is installed at the end of one insert tube 225. A connecting pipe 228 is connected to the end of the pressure relief valve 227. The pilot valve 223 at the end of the three-way pipe 224 is connected to the space on both sides of the other piston 203. The end of the three-way pipe 224 is connected to the sleeve 222. The flow direction of the pilot valve 223 is towards the side of the insert tube 225 where the pressure relief valve 227 is installed. The two insert tubes 225 are connected through the pressure relief valve 227 and the connecting pipe 228. The sleeve 222 is filled with tetrafluoroethane in a gas-liquid equilibrium state to perform forced heat exchange and improve water temperature stability. A dynamic cross-linking mechanism 30 is installed on the top of the support 12; The dynamic cross-linking mechanism 30 includes an air-blocking tube 301; Both ends of the crosslinking tube 1 are equipped with air-blocking tubes 301. A reducing sleeve 302 is installed inside the air-blocking tube 301. Several ring boxes 303 are evenly embedded in the outer wall of the air-blocking tube 301. An electromagnetic heating coil 304 is embedded in the outer wall of the crosslinking tube 1. A wall shell 305 is embedded in the inside of the crosslinking tube 1. A guide ring 306 is installed at one end of the wall shell 305. A through hole 308 is opened on the side end face of the guide ring 306. A winding plate 307 is wound around the outside of the guide ring 306. An air inlet tube 309 is connected to the bottom of the other side of the outer curved surface of the crosslinking tube 1. A threaded sleeve 310 is fitted on the outer side of the shaft 213 between the two rotating wheels 215. A sliding plug 311 is threadedly installed on the outer side of the threaded sleeve 310. A suction valve 312 is symmetrically installed on one side of the base 11 on both sides of the sliding plug 311. A tube 313 is installed at the end of the suction valve 312. An exhaust pipe 324 is symmetrically connected to the outer curved surface of the tube 313 on both sides of the suction valve 312. Negative pressure pipes 320 are connected to both ends of the tube 313. A shut-off valve 321 is connected to the end of the negative pressure pipe 321. An exhaust valve 314 is installed on the other side of the base 11 at the position corresponding to the intake valve 312. The end of the exhaust valve 314 is connected to a manifold 315. The end of the manifold 315 is connected to a diverter box 316. A throttle valve 317 is installed on the top of the side end of the diverter box 316. The end of the throttle valve 317 is connected to a bypass pipe 318. A gas supply valve 319 is installed on one side of the base 11. The outer thread of the threaded sleeve 310 is a reciprocating thread. The chamber where the sliding plug 311 is located is not connected to the chamber where the rotor 215 is located. The exhaust pipe 216 and the gas supply valve 319 are respectively connected to the chambers where the two rotors 215 are located. Both chambers where the two rotors 215 are located are connected to the cylinder 313 through the gas outlet pipe 324. The bypass pipe 318 is connected to the outermost ring box 303 of the two gas blocking pipes 301. The remaining ring boxes 303 are respectively connected to the negative pressure pipe 320 through the on / off valve 321. The diversion box 316 is connected to the chamber where the winding plate 307 is located through the air inlet pipe 309 to make multiple uses of nitrogen pressure. A pressure sensor 322 is installed on the top of the outer curved surface of the ring box 303. A temperature and pressure transmitter 323 is installed on one side of the top of the crosslinking pipe 1. The variable diameter sleeve 302 has several variable diameter sections 31 evenly spaced on its side wall. The variable diameter sleeve 302 has several slots 32 at equal angles along the circumference on both sides of the variable diameter section 31, and the slots 32 are located inside the ring box 303. The cavity formed by the wall shell 305 and the crosslinking pipe 1 is connected to the outer space of the guide ring 306 through the through hole 308 to guide the nitrogen gas. The side wall of the wall shell 305 has several guide grooves 33 at equal angles along the circumference. The guide grooves 33 and the winding plate 307 are both spiral. The gas supply valve 319 and the on / off valve 321 are both solenoid valves. The pressure sensor 322 and the temperature and pressure transmitter 323 are both connected to the external controller. The electromagnetic heating coil 304, the gas supply valve 319, the on / off valve 321, the pressure sensor 322, the temperature and pressure transmitter 323 and the input terminal of the motor 15 are all electrically connected to the output terminal of the external power supply to realize the dynamic control of temperature and pressure. like Figure 10 As shown, a semi-automatic processing method for improving the cross-linking degree of power cable insulation includes the following steps: S1. Place the crosslinking tube 1 and the matching dynamic crosslinking mechanism 30 and synchronous shaping mechanism 20 in the work area, align them with the external extrusion head, and pull the cable traction rope from the pre-extrusion process to complete the initial traction and guidance work. S2. Connect the gas supply valve 319 to the external nitrogen supply device. By driving the clean water to circulate, the surface of the cable insulation layer is quenched in a controlled manner, forming a dense condensed shell on its surface, while keeping its internal temperature above 135°C, in a molten state. S3, tetrafluoroethane circulation gas-liquid conversion, respectively heats and cools the clean water inside the two heat exchange tubes 207, and adjusts the regulating valve 208 to control the temperature of the water mist sprayed at the atomizing nozzle 219; S4. Nitrogen gas presses the inclined surface of the rotor 215, forming a combined force with the motor 15 to compensate for the pressure, and flows directionally inside and outside the crosslinking pipe 1. Under the action of the magnetic field generated by the electromagnetic heating coil 304, the shell 305 heats up under the action of eddy currents, providing a more stable crosslinking environment for the cable insulation layer. S5. Under pressure, some nitrogen will overflow into the variable diameter sleeve 302, forming three nitrogen barriers to provide buffer for nitrogen and prevent external air from entering the variable diameter sleeve 302. The pressure increases from the outside to the side of the cross-linking pipe 1, preventing nitrogen from mixing with external air. S6. The cable enters the guide tube 13 on the other side, where the water mist sprayed by the atomizing nozzle 219 cools and solidifies it. By adjusting the opening of the regulating valve 208, the temperature of the water mist sprayed by the atomizing nozzle 219 inside the two guide tubes 13 can be independently limited.

[0022] The working principle and usage process of this invention: Before performing cross-linking processing on the insulation layer of the cable, the cross-linking tube 1 and the matching dynamic cross-linking mechanism 30 and synchronous shaping mechanism 20 are first placed in the work area and aligned with the external extrusion head. The cable traction rope is pulled from the pre-extrusion process and inserted into the guide tube 13 on one side of the cross-linking tube 1. It passes through the air blocking tube 301 at one end of the cross-linking tube 1 from the inside of the variable diameter sleeve 302, enters the cross-linking tube 1, passes through the air blocking tube 301 at the other end of the cross-linking tube 1, and exits through the guide tube 13 on the other side of the cross-linking tube 1. Its end is connected to the external traction mechanism to complete the initial traction and guidance work. Next, connect the gas supply valve 319 to the external nitrogen supply device, and then start the equipment to perform the formal cross-linking process of the cable insulation layer. During the cross-linking process of the cable insulation layer, as the motor 15 starts, it will drive the shaft 213 to rotate. Under the transmission of the drive wheel 214 and the driven wheel 212, the torque will be amplified and drive the drive rod 202 to deflect synchronously. Then, the two pistons 203 will move back and forth inside the housing 201 under the thread drive. Then, under the traction of one piston 203, the clean water inside the water tank 14 will be drawn into the chamber where the piston 203 is located by passing through the water valve 204 at the end of the suction pipe 211. The water then flows through the water valve 204 at the top of the tank 201 and is forced into the guide box 205. It is then divided into two parts, which pass through the corresponding regulating valves 208 along the two branch pipes 206 and enter the heat exchange tubes 207 inside the two sleeves 222. The water then injected into the two heat exchange tubes 207 will flow into the main pipe 209 and merge again. It then enters the bottom of the chamber where the hollow wheel 220 is located through the main pipe 209, presses the inclined surface of the hollow wheel 220, and drives the hollow wheel 220 to rotate. Subsequently, as it flows through the opening 221, it passes through the opening 221 and enters the clamping cavity 218. It is then sprayed out in the form of water mist through each atomizing nozzle 219. Driven by the hollow wheel 220, the rotating drum 217 will drive each atomizing nozzle 219 to rotate synchronously around the inner side of the cable. Then, when the external traction mechanism pulls the cable through the rotating drum 217, each atomizing nozzle 219 will spray water mist evenly around the cable, which will controllably quench the surface of its insulation layer, so that a dense condensed shell with a thickness of 1.5mm is formed on the surface of the insulation layer, and the internal temperature is kept above 135℃, in a molten state. Then the water flow will gather at the bottom of the guide cylinder 13 and flow back into the water tank 14 through the drain pipe 210, forming a complete water flow cycle. Meanwhile, driven by another piston 203, the tetrafluoroethane inside the sleeve 222 on the side without the pressure relief valve 227 is drawn in through the connected three-way pipe 224, through the pilot valve 223 on that side, and into the chamber where the piston 203 is located. Subsequently, under the pressure of the piston 203, the tetrafluoroethane passes through the pilot valve 223 on the other side, through the connected three-way pipe 224, and enters the other sleeve 222. As the pressure inside the sleeve 222 from which the tetrafluoroethane has been extracted decreases, the remaining tetrafluoroethane will rapidly vaporize. Correspondingly, as the pressure inside the other sleeve 222 increases, the tetrafluoroethane will rapidly liquefy inside. Subsequently, the liquefied tetrafluoroethane will pass through the side port 226, enter the corresponding insertion tube 225, pass through the pressure relief valve 227, and enter the other insertion tube 225 through the connecting tube 228. It will then pass through the corresponding side port 226 and flow back into the sleeve 222 from which the tetrafluoroethane has been extracted. Due to the sudden decrease in pressure, it will vaporize again, and so on. Furthermore, as the water flows through the heat exchange tubes 207 inside the two sleeves 222, the tetrafluoroethane vaporizes and absorbs the heat carried by the water, cooling it down. As the tetrafluoroethane liquefies, it releases heat, heating the water. This process heats and cools the water flowing through the heat exchange tubes 207 inside the two sleeves 222. During this process, the flow rate of water injected into the two heat exchange tubes 207 at the same time can be adjusted by regulating the regulating valve 208, thereby adjusting the ratio of water being cooled to water being heated. Furthermore, the temperature of the two water flows after they converge in the air inlet pipe 309 can be limited, thus controlling the temperature of the water mist sprayed at the atomizing nozzle 219. This allows for flexible control of the quenching process on the surface of the insulation layer according to actual needs. As nitrogen is injected into the gas delivery valve 319, it enters the chamber where the rotating wheel 215 is located. With the continuous injection of nitrogen, the inclined surface of the rotating wheel 215 is compressed, causing it to rotate. The external nitrogen delivery pressure is initially converted and utilized, forming a combined force with the motor 15 to drive the shaft 213 to rotate. The threaded sleeve 310 also rotates accordingly, causing the sliding plug 311 to move back to its original position inside the base 11 under the thread drive. Then, under the guidance of the suction valve 312, a negative pressure is formed at the tube 313, forming a combined force with the external nitrogen delivery device to draw the nitrogen injected into the chamber where the rotating wheel 215 is located into the chamber where the sliding plug 311 is located. Subsequently, under the pressure of the sliding plug 311, the nitrogen gas will pass through the outlet valve 314 and enter the distribution box 316 through the manifold 315. Most of the nitrogen gas will then enter the space enclosed by the crosslinking pipe 1 and a guide ring 306 through the inlet pipe 309, and spiral forward under the guidance of the winding plate 307, pass through the through hole 308, enter the cavity enclosed by the wall shell 305 and the crosslinking pipe 1, and then be discharged through the guide groove 33. The nitrogen gas spirally wraps around the cable, corrects the position of the cable, and reduces the influence of gravity. Nitrogen then enters the exhaust pipe 216 and flows through the exhaust pipe 216 into the chamber where another rotor 215 is located, pressing the inclined surface of the rotor 215. The rotor 215 drives the shaft 213 to rotate, further converting and utilizing the nitrogen pressure. Subsequently, it enters the cylinder 313 through the exhaust pipe 324 and is drawn back into the chamber where the sliding plug 311 is located through the intake valve 312, forming a complete nitrogen cycle. In the aforementioned process, nitrogen gas drives the shaft 213 to rotate through the wheel 215, which can form a combined force with the motor 15, reducing the load on the motor 15 and causing the high-pressure nitrogen gas to flow directionally inside and outside the crosslinking pipe 1. Under the action of the alternating magnetic field generated by the electromagnetic heating coil 304, eddy currents are generated in the shell 305 and heat up, which can heat the flowing nitrogen gas. During the flow of nitrogen gas, the cable insulation layer is heated uniformly, which can provide a more stable crosslinking environment for the cable insulation layer and improve the degree of crosslinking. It should be added here that: under pressure, some of the nitrogen injected into the cross-linking pipe 1 will overflow into the reducing sleeve 302. When passing through the reducing section 31, due to the decrease in inner diameter, the flow velocity increases and the static pressure decreases, the reducing section 31 will further contract. While preventing nitrogen from overflowing, it will form the first nitrogen barrier, preventing nitrogen from overflowing and entering the innermost ring box 303 inner chamber, isolating the nitrogen by pressure difference. Subsequently, the nitrogen will pass through the second reducing section 31, forming the second nitrogen barrier, and enter the middle ring box 303, providing a buffer for the nitrogen. This can create a more stable nitrogen environment in the cross-linking pipe 1, promoting more efficient cable insulation layering and improving the cross-linking effect. Meanwhile, during the aforementioned process, a very small portion of the nitrogen entering the distribution box 316 will pass through the throttle valve 317 and enter the outermost ring box 303 via the bypass pipe 318. Some nitrogen will pass through the slot 32 and enter the variable diameter section 31 connected to it, which is close to the cross-linking pipe 1. This will counteract the nitrogen overflowing from the middle ring box 303, forming a third nitrogen barrier. Some nitrogen will pass through the outermost variable diameter section 31 and be discharged at a pressure higher than atmospheric pressure, preventing external air from entering the variable diameter sleeve 302, forming the outermost nitrogen barrier, and can also purge the cable insulation layer to remove moisture carried on its surface. Here, by adjusting the opening of the throttle valve 317, the amount of nitrogen injected into the outermost ring box 303 can be controlled, limiting the amount of nitrogen loss during the crosslinking process. At the same time, the pressure sensor 322 will monitor the nitrogen pressure inside the ring box 303 in real time and provide real-time feedback to the external control terminal. When the internal air pressure of the ring box 303 closest to the crosslinking pipe 1 and the middle ring box 303 is greater than the set value, the external control terminal will open the corresponding on / off valve 321. With the connection of the negative pressure pipe 320, some nitrogen will be drawn into the cylinder 313 and sent into the nitrogen circulation, so that the nitrogen pressure inside the three ring boxes 303 increases from the outside to the crosslinking pipe 1 side. This not only provides a stable pressure change gradient for the cable insulation layer and reduces the impact of pressure change, but also prevents nitrogen from mixing with the outside air. At the same time, the temperature and pressure transmitter 323 will also monitor the nitrogen pressure and temperature inside the crosslinking tube 1 in real time and feed it back to the external control terminal. When the nitrogen pressure inside the crosslinking tube 1 is insufficient, the external control terminal will actively open the gas supply valve 319 to extract external nitrogen and replenish the nitrogen, and simultaneously control the output power and start / stop of the electromagnetic heating coil 304 to maintain the nitrogen temperature stability and provide a more suitable crosslinking environment for crosslinking. As the cable is pulled into the guide cylinder 13 on the other side, the water mist sprayed by the atomizing nozzle 219 inside will further cool and solidify it. By adjusting the opening of the regulating valve 208, the temperature of the water mist sprayed by the atomizing nozzle 219 inside the two guide cylinders 13 can be independently limited to flexibly meet the processing requirements.

[0023] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A semi-automatic processing device for improving the crosslinking degree of power cable insulation layer, comprising a crosslinking pipe (1), characterized in that: A base (11) is installed at the bottom of the crosslinking pipe (1), a motor (15) is installed on one side of the base (11), a support (12) is installed on both sides of the base (11), a guide tube (13) is installed on both sides of the crosslinking pipe (1), a water tank (14) is installed at the bottom of the guide tube (13), and a synchronous shaping mechanism (20) is installed on the outside of the water tank (14). The synchronous shaping mechanism (20) includes a housing (201); A housing (201) is installed on the side end face of the support (12). A drive rod (202) is rotatably installed at the end of the housing (201). A piston (203) is symmetrically installed on the outside of the drive rod (202) by thread. Water valves (204) are symmetrically installed at the top and bottom of the housing (201). A guide box (205) is installed on the top of the housing (201). Branch pipes (206) are connected to both sides of the guide box (205). Heat exchange tubes (207) are symmetrically arranged on both sides of the housing (201). A regulating valve (208) and a main pipe (209) are respectively connected to both ends of the heat exchange tubes (207). A drain pipe (210) is connected to the bottom of the outer curved surface of the guide cylinder (13). A suction pipe (211) is connected to the bottom of the side end face of the water tank (14). The driven rod (202) is equipped with a driven wheel (212) at its end, and the base (11) is rotatably equipped with a shaft (213) at its end. Both ends of the shaft (213) are equipped with driving wheels (214). The outer curved surface of the shaft (213) is symmetrically equipped with a rotating wheel (215). The top of one side of the outer curved surface of the crosslinking pipe (1) is connected to an exhaust pipe (216).

2. The semi-automatic processing equipment for improving the cross-linking degree of power cable insulation layer according to claim 1, characterized in that, A rotating cylinder (217) is rotatably installed inside the guide cylinder (13). The rotating cylinder (217) and the guide cylinder (13) together form a clamping cavity (218). A plurality of atomizing nozzles (219) are evenly installed on the inner wall of the rotating cylinder (217). A hollow wheel (220) is installed at the end of the rotating cylinder (217). An opening (221) is provided at the top of the inner wall of the guide cylinder (13) between the clamping cavity (218) and the hollow wheel (220). A sleeve (222) is fitted around the outside of the heat exchange tube (207). Pilot valves (223) are symmetrically installed on both ends of the box (201). A three-way pipe (224) is connected to the end of the pilot valve (223). An insert (225) is installed inside the heat exchange tube (207). Several side openings (226) are opened at equal angles along the circumferential direction on one side of the outer wall of the insert (225). A pressure relief valve (227) is installed at the end of one insert (225). A connecting pipe (228) is connected to the end of the pressure relief valve (227).

3. The semi-automatic processing equipment for improving the crosslinking degree of power cable insulation layer according to claim 1, characterized in that, The water valves (204) are connected to the spaces on both sides of a piston (203), and the flow direction of each water valve (204) is from the bottom of the box (201) towards the top of the box (201). The guide box (205) is connected to the water valve (204) at the top of the box (201). The suction pipe (211) is connected to the water valve (204) at the bottom of the box (201). The heat exchange tube (207) is spiral, and the two heat exchange tubes (207) are connected to the two branch pipes (206) through the regulating valves (208) at the ends.

4. The semi-automatic processing equipment for improving the crosslinking degree of power cable insulation layer according to claim 1, characterized in that, The output shaft of the motor (15) is connected to the shaft (213). The driven wheel (212) is connected to the driving wheel (214) through gear teeth. The radius of the driving wheel (214) is smaller than that of the driven wheel (212). The drive rod (202) is composed of two reciprocating screws connected in series. The chambers where the two pistons (203) are located inside the housing (201) are not connected.

5. A semi-automatic processing equipment for improving the cross-linking degree of power cable insulation layer according to claim 2, characterized in that, The end of the main pipe (209) is connected to the bottom of the chamber where the hollow wheel (220) is located, and the top of the chamber where the hollow wheel (220) is located is connected to the clamping cavity (218) through the opening (221). The clamping cavity (218) is connected to the atomizing nozzle (219). The bottom of the guide tube (13) is connected to the water tank (14) through the leak pipe (210). The water tank (14) is filled with clean water.

6. A semi-automatic processing equipment for improving the cross-linking degree of power cable insulation layer according to claim 2, characterized in that, The pilot valve (223) at the end of the three-way pipe (224) is connected to the space on both sides of the other piston (203), and the end of the three-way pipe (224) is connected to the sleeve (222). The flow direction of the pilot valve (223) is towards the side of the insertion tube (225) on which the pressure relief valve (227) is installed. The two insertion tubes (225) are connected through the pressure relief valve (227) and the connecting pipe (228). The sleeve (222) is filled with tetrafluoroethane in a gas-liquid equilibrium state.

7. A semi-automatic processing equipment for improving the cross-linking degree of power cable insulation layer according to claim 2, characterized in that, A dynamic cross-linking mechanism (30) is installed on the top of the support (12); The dynamic cross-linking mechanism (30) includes a gas-blocking tube (301); Both ends of the crosslinking tube (1) are equipped with air-blocking tubes (301). A variable diameter sleeve (302) is installed inside the air-blocking tube (301). Several ring boxes (303) are evenly embedded in the outer wall of the air-blocking tube (301). An electromagnetic heating coil (304) is embedded in the outer wall of the crosslinking tube (1). A wall shell (305) is embedded inside the crosslinking tube (1). A guide ring (306) is installed at one end of the wall shell (305). A through hole (308) is opened on the side end face of the guide ring (306). A winding plate (307) is wound around the outside of the guide ring (306). An air inlet pipe (309) is connected to the bottom of the other side of the outer curved surface of the crosslinking tube (1). A threaded sleeve (310) is fitted on the outer side of the shaft (213) between the two rotating wheels (215). A sliding plug (311) is threaded on the outer side of the threaded sleeve (310). A suction valve (312) is symmetrically installed on one side of the base (11) on both sides of the sliding plug (311). A tube (313) is installed at the end of the suction valve (312). An exhaust pipe (324) is symmetrically connected on the outer curved surface of the tube (313) on both sides of the suction valve (312). A negative pressure pipe (320) is connected to both ends of the tube (313). A shut-off valve (321) is connected to the end of the negative pressure pipe (320). An exhaust valve (314) is installed on the other side of the base (11) at the position corresponding to the intake valve (312). The end of the exhaust valve (314) is connected to a manifold (315). The end of the manifold (315) is connected to a distribution box (316). A throttle valve (317) is installed on the top of the side end face of the distribution box (316). A bypass pipe (318) is connected to the end of the throttle valve (317). An air supply valve (319) is installed on one side of the side end face of the base (11). A pressure sensor (322) is installed on the top of the outer curved surface of the ring box (303). A temperature and pressure transmitter (323) is installed on one side of the top of the crosslinking pipe (1).

8. A semi-automatic processing equipment for improving the cross-linking degree of power cable insulation layer according to claim 7, characterized in that, The outer thread of the threaded sleeve (310) is a reciprocating thread. The chamber where the sliding plug (311) is located is not connected to the chamber where the wheel (215) is located. The exhaust pipe (216) and the gas supply valve (319) are respectively connected to the chambers where the two wheels (215) are located. The chambers where the two wheels (215) are located are connected to the cylinder (313) through the gas outlet pipe (324). The bypass pipe (318) is connected to the outermost ring box (303) of the two gas blocking pipes (301). The remaining ring boxes (303) are respectively connected to the negative pressure pipe (320) through the on / off valve (321). The diverter box (316) is connected to the chamber where the winding plate (307) is located through the air inlet pipe (309).

9. A semi-automatic processing equipment for improving the crosslinking degree of power cable insulation layer according to claim 7, characterized in that, The variable diameter sleeve (302) has several variable diameter parts (31) evenly spaced on its side wall. The variable diameter sleeve (302) has several slots (32) at equal angles along the circumference on both sides of the variable diameter parts (31). The slots (32) are located inside the ring box (303). The cavity formed by the wall shell (305) and the crosslinking pipe (1) is connected to the outer space of the guide ring (306) through the through hole (308). The sidewall of the shell (305) is provided with a number of guide grooves (33) at equal angles along the circumference. The guide grooves (33) and the winding plate (307) are both spiral. The gas supply valve (319) and the on / off valve (321) are both solenoid valves. The pressure sensor (322) and the temperature and pressure transmitter (323) are both connected to an external controller. The input terminals of the electromagnetic heating coil (304), the gas supply valve (319), the on / off valve (321), the pressure sensor (322), the temperature and pressure transmitter (323), and the motor (15) are all electrically connected to the output terminal of an external power supply.

10. A semi-automatic processing method for improving the crosslinking degree of power cable insulation layer, wherein the processing method of the semi-automatic processing equipment for improving the crosslinking degree of power cable insulation layer according to claim 7 is characterized in that, Includes the following steps: S1. Place the crosslinking pipe (1) and the matching dynamic crosslinking mechanism (30) and synchronous shaping mechanism (20) in the work area, align them with the external extrusion head, and pull the cable traction rope from the pre-extrusion process to complete the initial traction guidance work. S2. Connect the gas supply valve (319) to the external nitrogen supply device. By driving the clean water to circulate, the surface of the cable insulation layer is quenched in a controlled manner, forming a dense condensed shell on its surface, and keeping its internal temperature above 135°C, in a molten state. S3, tetrafluoroethane circulation gas-liquid conversion, respectively heating and cooling the clean water inside the two heat exchange tubes (207), adjusting the regulating valve (208) to control the temperature of the water mist sprayed at the atomizing nozzle (219); S4. Nitrogen gas presses the inclined surface of the impeller (215) and forms a combined force with the motor (15) to perform pressure compensation. It flows in a direction inside and outside the crosslinking pipe (1). Under the action of the magnetic field generated by the electromagnetic heating coil (304), the shell (305) heats up under the action of eddy current, providing a more stable crosslinking environment for the cable insulation layer. S5. Under pressure, some nitrogen will overflow into the variable diameter sleeve (302), forming three nitrogen barriers to provide a buffer for nitrogen and prevent external air from entering the variable diameter sleeve (302). The pressure increases from the outside to the cross-linking pipe (1), preventing nitrogen from mixing with external air. S6. The cable enters the guide tube (13) on the other side, where the water mist sprayed by the atomizing nozzle (219) cools and solidifies it. By adjusting the opening of the regulating valve (208), the temperature of the water mist sprayed by the atomizing nozzle (219) inside the two guide tubes (13) can be independently limited.

Images