Powder removing and cooling device for ultra-clean insulating material of high-voltage cable

Abstract

The invention discloses a powder removing and cooling device for an ultra-clean insulating material of a high-voltage cable, belongs to the field of cable equipment, and solves the problem that a part of powder impurities exist in a crosslinked polyethylene material due to the fact that the powder removing effect of high-voltage air conveying is not obvious in the prior art. In the invention, a dust removal device is arranged in the dust removal box body; the dust removal device comprises high-pressure air supply equipment, and an air outlet of the high-pressure air supply equipment is located in the bottom end face of the interior of the dust removal box body and one side surface of the interior of the dust removal box body. A plurality of cooling pipelines are arranged in the powder removing box body, are arranged in a closed manner and are connected with refrigeration cycle equipment; the powder removing box body is connected with a high polymer material flowing pipeline, and one end of the high polymer material flowing pipeline is communicated with the interior of the powder removing box body. The dust removing and cooling device for the ultra-clean insulating material of the high-voltage cable is used for removing dust of a finished ultra-clean material, the voltage grade and cleanliness of the material are improved, and the use requirements of high-voltage and ultrahigh-voltage cables are met.

Description

TECHNICAL FIELD

[0001] The application relates to a high-voltage cable ultra-clean insulation material powder removal cooling device and belongs to the cable equipment field. BACKGROUND

[0002] Common high-voltage cable voltage grades are 35-110 kV, 110 kV-750 kV belong to super-high-voltage cables, and 1000 kV or above belong to extra-high-voltage cables. The super-high-voltage cable and the extra-high-voltage cable are necessary power transmission equipment for super-long distance power transmission, have advantages of long power transmission distance, large capacity, high efficiency, low loss, low unit cost and land occupation, and can effectively solve the transmission of super-long distance and super-large scale energy.

[0003] Cross-linked polyethylene is a main raw material of an insulation layer of a high-voltage and super-high-voltage cable material. Insulation is a key performance of a wire and cable, and the influence of conventional cable voltage grades and purity on cable insulation is low. However, the high-voltage and super-high-voltage cable voltage grades are high, and the internal electric field strength is high. In order to prevent breakdown, the insulation material required needs to have high purity and uniformity.

[0004] The cross-linked polyethylene ultra-clean insulation material inevitably has powder in the cross-linked polyethylene material due to the post-absorption method, material mixing friction and pipeline transportation and other process flows after the use of a cross-linking agent. The powder has an important influence on the quality control of the cross-linked polyethylene, the improvement of the voltage grade and the subsequent extrusion processing and continuous production. At present, a large amount of powder is generated in the post-absorption process of the 110 kV high-voltage and super-high-voltage cross-linked polyethylene material. The effect of the traditional high-pressure air blowing powder removal is not obvious. The cross-linked polyethylene material has part of powder impurities, which affects the insulation performance of the cable insulation material.

[0005] CONTENT

[0006] The application provides a high-voltage cable ultra-clean insulation material powder removal cooling device for dust separation of an ultra-clean material finished product, improves the voltage grade and cleanliness of the material and meets the use requirements of a high-voltage and super-high-voltage cable.

[0007] The technical scheme adopted by the application is a high-voltage cable ultra-clean insulation material powder removal cooling device, which comprises a powder removal box body, and a dust removal device is arranged in the powder removal box body.

[0008] The dust removal device comprises a high-pressure air supply device, and an air outlet of the high-pressure air supply device is located at an inner bottom end surface of the powder removal box body and one of inner side surfaces of the powder removal box body.

[0009] The powder removal box body is internally provided with a plurality of cooling pipelines, and the cooling pipelines are closed and connected with a refrigeration circulation device.

[0010] The dust removal chamber is connected to a polymer material flow pipe; the polymer material flow pipe includes an inlet pipe and an outlet pipe. The inlet pipe is located on one side of the top of the dust removal chamber and communicates with the interior of the dust removal chamber; the outlet pipe is located on the side of the bottom of the dust removal chamber and communicates with the interior of the dust removal chamber.

[0011] The optimized high-voltage cable ultra-clean insulation material dust removal and cooling device includes a high-pressure air supply equipment comprising a high-pressure blower and a filter, with the air outlet of the high-pressure blower connected to the interior of the dust removal box via a pipe.

[0012] The filter is located inside the pipe between the outlet of the high-pressure blower and the dust removal box; or the filter is located inside the dust removal box and is installed in conjunction with the outlet of the pipe between the outlet of the high-pressure blower and the dust removal box.

[0013] The optimized high-voltage cable ultra-clean insulation material dust removal and cooling device has several parallel and spaced partitions inside the dust removal box, and cooling pipes pass through the partitions and are fixed relative to the partitions.

[0014] All cooling pipes are arranged in parallel intervals; cooling deionized water is circulated through the cooling pipes.

[0015] The optimized high-voltage cable ultra-clean insulation material dust removal and cooling device has a vibrating screen at the bottom of the dust removal box;

[0016] The vibrating screen includes a screen box and a circular vibrating screen exciter; the circular vibrating screen exciter is located in the middle of the screen box; the screen box is installed at the bottom of the dust removal box, and the screen box has a screen surface with several screening channels for materials to pass through.

[0017] The optimized high-voltage cable ultra-clean insulation material dust removal and cooling device has several elastic support devices between the lower part of the screen box and the bottom of the dust removal box, and the screen box is fixed to the dust removal box through the elastic support devices.

[0018] The discharge pipe of the polymer material flow channel is configured to cooperate with the discharge end of the vibrating screen.

[0019] The optimized dust removal and cooling device for ultra-clean insulation materials of high-voltage cables has a dust collection pipe at the top of the dust removal box, and an electrostatic generator is installed inside the dust collection pipe.

[0020] The optimized high-voltage cable ultra-clean insulation material dust removal and cooling device includes an electrostatic generator comprising an electrostatic housing, with connection openings at both ends of the electrostatic housing to the discharge pipe of the polymer material flow pipe. The electrostatic housing is connected to the middle section of the discharge pipe of the polymer material flow pipe through the connection openings and communicates with the inside of the polymer material flow pipe.

[0021] The electrostatic housing is provided with a number of spaced-apart electrode plates, and the electrode plates are provided with a number of spaced-apart dust collection plates.

[0022] In the optimized version of the above-mentioned ultra-clean insulation material dust removal and cooling device for high-voltage cables, the electrode plate and the polymer material flow pipe are arranged parallel to the flow direction of the polymer material.

[0023] The dust collection plate is strip-shaped and protrudes from the surface of the electrode plate. Adjacent dust collection plates are arranged in parallel and spaced apart.

[0024] In the optimized version of the above-mentioned high-voltage cable ultra-clean insulation material dust removal and cooling device, the outlet end of the feed pipe of the polymer material flow pipe is set towards the bottom of the dust removal box.

[0025] In addition to the powder box having an inclined guide plate, the guide plate is located below the outlet end of the feed pipe of the polymer material flow pipe.

[0026] The advantages of this application are as follows: In the technical solution of this application, the cross-linked polyethylene insulation material falls freely from the top along the baffle into the material dust removal box. The air generated by the high-pressure blower after filtration conveys the cross-linked polyethylene radially and longitudinally through the bottom and sides, thereby realizing the radial forward movement and longitudinal suspension of the material, and the removal of dust from the surface of the material. The top of the box adopts an exhaust system to realize dust filtration and collection and air circulation.

[0027] During the longitudinal suspension process, the cross-linked polyethylene material is fully connected to the cooling pipe, and the cooling water in the pipe transfers heat to reduce the temperature of the material, thus achieving the cooling effect.

[0028] Cross-linked polyethylene material, which is conveyed by air and cooled by pipeline, falls onto a vibrating screen under gravity. The high-frequency vibration of the vibrating screen causes the cross-linked polyethylene material to bounce again, further removing the powder from the surface of the material.

[0029] During the gravity feeding process of the material through the conveying pipeline, an electrostatic generator installed inside the pipeline starts working. The electrostatic field charges the dust particles, causing them to adhere to the dust collection plate under the influence of the electric field, thus achieving complete separation of dust and material, resulting in ultra-clean material. The cross-linked polyethylene ultra-clean insulation material produced using this device and method can meet the production requirements of 500kV, with a dust removal rate of 95%. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure in this application;

[0031] Figure 2 This is a schematic diagram of the electrostatic generator in this application;

[0032] Figure 3 This is a schematic diagram of the structure of the vibrating screen in this application;

[0033] Figure 4 This is a schematic diagram of the structure of the filter in this application;

[0034] Figure 5 This is a schematic diagram of the refrigeration cycle equipment in this application. Detailed Implementation

[0035] The technical features of this application are further described below with reference to the accompanying drawings and specific embodiments.

[0036] As shown in the figure, this application discloses a dust removal and cooling device for ultra-clean insulation materials of high-voltage cables, including a dust removal box 1, which contains a dust removal device. The dust removal device in this application mainly comprises five parts: a high-pressure fan, a filter, cooling pipes, a vibrating screen, and an electrostatic generator.

[0037] The outlet of the high-pressure air supply device 2 is located on the bottom inner surface and one side surface of the dust removal box 1. The high-pressure air supply device 2 includes a high-pressure blower and a filter, and the outlet of the high-pressure blower is connected to the interior of the dust removal box 1 through a pipe.

[0038] High-pressure blowers are used to blow polymer materials from the bottom and sides through filters. Affected by the direction and magnitude of the wind speed, the polymer materials move forward due to the lateral wind force. At the same time, the dust on the surface of the particles is suspended above the box by the bottom wind force, thus separating the dust from the polymer particles.

[0039] In one embodiment of this application, the filter is located inside the duct between the outlet of the high-pressure blower and the dust removal chamber 1. In other embodiments of this application, the filter is located inside the dust removal chamber 1, and is fitted to the outlet of the duct between the outlet of the high-pressure blower and the dust removal chamber 1. The filter is used to filter the high-pressure air and the detached dust, achieving a cleanliness level during the air conveying process, and the entire enclosed space of the device reaches Class 100.

[0040] In one embodiment of this application, the filter can be a commonly used filter device with a filter element in the prior art. Its structure is shown in the figure, including a filter element 701, a sewage discharge system 702 and connecting flanges 703 at both ends. The fluid to be filtered enters the filter through the channel in the middle of the inlet connecting flange 703, flows out after passing through the filter element 701, and the filtered impurities are discharged through the sewage discharge port of the sewage discharge system 702 at the rear.

[0041] Specifically, the main structure of the filter includes a main pipe, two connecting flanges 703 at both ends, a filter element 701, and a support frame. The two connecting flanges 703 at both ends are used to connect to the production system pipeline, and the filter element 701 is an internal multi-layer filter element assembly.

[0042] Filter element 701 is the core filtration unit. Filter element 701 adopts a multi-layer gradient structure, with an outer coarse filtration layer and an inner fine filtration layer (to achieve high-precision filtration). The filter media may be made of corrosion-resistant and highly permeable materials (such as stainless steel porous tubes, special filter paper or PTFE membranes).

[0043] The auxiliary component with a drainage system 702 has a drain port at the bottom for periodically discharging trapped impurities. The auxiliary component also includes a pressure detection interface for monitoring the pressure difference before and after filtration to determine the filter element's clogging status.

[0044] The working principle of the filter is as follows.

[0045] Gas flow path: The gas containing impurities generated during the dust removal process enters the filter through the main pipeline inlet. First, it enters the coarse filter layer to intercept larger dust particles; then the gas enters the fine filter layer, where the microporous structure further traps tiny particles, colloids, or contaminants; finally, the purified gas returns to the circulation system and enters the dust removal process of the insulating material.

[0046] Filtration mechanism: The coarse filter layer uses materials with larger pore sizes to quickly separate macroscopic impurities through sieving, reducing the load on the fine filter layer; the fine filter layer uses high-precision filter media (such as multi-layer laminated filter paper and composite membranes) to remove submicron particles through adsorption and interception, ensuring that the gas purity meets the requirements for insulation material production.

[0047] Impurity handling: The trapped impurities will accumulate on or inside the filter element. When the filtration pressure difference reaches the set value, the impurities need to be manually or automatically discharged through the drain port, or the filter element should be disassembled regularly for cleaning / replacement to avoid impurities clogging the filter and causing a decrease in filtration efficiency.

[0048] The end is equipped with a flange (with bolt holes) and is fixed to the pipe flange with bolts. A sealing gasket (such as a graphite gasket) is installed between the flanges to enhance the seal. The outer casing is made of stainless steel to prevent external impurities from affecting the filtration effect.

[0049] In this application, in addition to the powder box 1 having several cooling pipes 3 inside, the cooling pipes 3 are enclosed and connected to a refrigeration circulation device.

[0050] In one embodiment of this application, a plurality of parallel and spaced partitions 101 are provided inside the powder box 1. Cooling pipes 3 pass through the partitions 101 and are fixed relative to the partitions 101. All cooling pipes 3 are arranged in parallel and spaced apart. Cooling deionized water flows through the cooling pipes 3.

[0051] In one embodiment of this application, the cooling deionized water is circulated through a refrigeration cycle device.

[0052] In one embodiment of this application, the refrigeration cycle equipment adopts a circulating chiller, the structure of which is shown in the figure. The circulating chiller is an integrated fluid cooling device, the core of which is composed of a chilled water distribution circuit and a vapor compression refrigeration circuit coupled together. The directional transfer of cooling capacity and the temperature control at the load end are achieved through heat exchange between the two circuits. Its working principle is as follows.

[0053] In the chilled water distribution loop (cold capacity distribution unit), hot return water enters the equipment via chilled water return pipe 801 and is temporarily stored in the storage tank. Chilled water pump 802, acting as a power source, drives the fluid in the tank into the heat exchange channel of the evaporator. After heat exchange with the refrigerant, the fluid temperature drops to a set value, becoming low-temperature chilled water. This low-temperature chilled water is then distributed to the load end (such as process equipment, precision instruments, and other heat loads) via chilled water outlet pipe 803. After absorbing the heat generated during load operation, it forms hot return water and re-enters the loop to complete the closed-loop circulation.

[0054] The vapor compression refrigeration circuit (cold capacity production unit) achieves continuous cold capacity production based on the vapor compression refrigeration cycle.

[0055] During the compression process, the compressor performs adiabatic compression on the gaseous refrigerant, converting it into high-temperature, high-pressure superheated steam.

[0056] During the condensation process, high-temperature and high-pressure vapor enters the condenser and releases heat to the cooling medium (or environment) under constant pressure conditions, condensing into low-temperature and high-pressure liquid refrigerant;

[0057] During the evaporation process, the liquid refrigerant enters the working fluid channel of the evaporator and undergoes forced convection heat exchange with the chilled water under constant pressure conditions. It absorbs heat from the chilled water through phase change heat transfer (evaporation) and transforms itself into a low-temperature, low-pressure gaseous refrigerant, thereby cooling the chilled water.

[0058] During the return process, the gaseous refrigerant returns to the compressor suction end through the return pipeline, re-enters the compression process, and completes the refrigeration cycle.

[0059] The two circuits are thermally coupled through an evaporator. The refrigeration circuit continuously produces cooling capacity, while the chilled water circuit acts as a cooling capacity distribution carrier, transferring the cooling capacity to the load end, ultimately achieving heat transfer from the load and stable control of the process temperature.

[0060] In one embodiment of this application, the cooling pipes are arranged in the middle of the box. Depending on the size of the box, they can be arranged in parallel at the top, middle, bottom, inside and outside. Cooling water (deionized water to avoid scaling) flows through the pipes. Material particles blown by the high-pressure fan come into contact with the cooling pipes, thereby achieving the material cooling function. During the cooling process, the polymer material does not come into contact with the cooling water. The cooling water flowing in the pipes can be adjusted in temperature from 0 to 100°C according to the process control requirements.

[0061] In this application, the dust removal chamber 1 is connected to a polymer material flow pipe 4, which includes an inlet pipe and an outlet pipe. The inlet pipe of the polymer material flow pipe 4 is located on one side of the top of the dust removal chamber 1 and communicates with the interior of the dust removal chamber 1. The outlet pipe of the polymer material flow pipe 4 is located on the side of the bottom of the dust removal chamber 1 and communicates with the interior of the dust removal chamber 1.

[0062] In one embodiment of this application, a vibrating screen 4 is provided at the bottom of the dust removal box 1. The vibrating screen 4 is placed at the bottom of the dust removal device, and through high-frequency vibration, the polymer material is further agitated, causing the residual dust to fall off under the action of vibration and gravity, thereby achieving the dust removal effect. The vibrating screen 4 can be a multi-layer or single-layer open vibrating screen commonly used in the prior art.

[0063] In one embodiment of this application, the structure of the selected vibrating screen is shown in the figure. The bottom of the dust removal box 1 has a vibrating screen 4. The vibrating screen 4 includes a screen box 401 and a circular vibrating screen vibrator 402. The circular vibrating screen vibrator 402 is disposed in the middle of the screen box 401. The screen box 401 is installed at the bottom of the dust removal box 1. The screen box 401 has a screen surface with several screening channels for material to pass through.

[0064] In one embodiment of this application, a plurality of elastic support devices 403 are provided between the lower part of the screen box 401 and the bottom of the dust removal box 1, and the screen box 401 is fixed to the dust removal box 1 by the elastic support devices 403. The discharge pipe of the polymer material flow pipe 4 is configured to cooperate with the discharge end of the vibrating screen 4.

[0065] In this embodiment, the working principle of the vibrating screen 4 is as follows: the vibrating screen 4 operates based on the logic of "vibration driven by excitation force + dynamic screening of materials". The source of the excitation force is that after the vibrator of the circular vibrating screen is powered on, the internal eccentric block rotates at high speed, generating a periodic centrifugal excitation force. The screen box vibration is achieved by the excitation force driving the screen box to move in an approximately circular vibration trajectory. The material on the screen surface is repeatedly thrown up and down and moves towards the discharge end as the screen box vibrates; during the process, materials with a particle size smaller than the screen holes pass through the screen surface (undersize material), while materials larger than the screen holes remain on the screen surface (oversize material), thus achieving classification.

[0066] Elastic support devices can buffer vibrations, reduce the transmission of equipment vibrations to the foundation, and reduce noise and foundation damage.

[0067] In this embodiment, the vibrating screen 4 operates according to the process of "feeding → vibrating screening → graded discharge". During feeding, the material to be processed enters the screen surface from the feed end of the screen box; when vibration is started, the vibrator is turned on, and the screen box begins to vibrate along the trajectory; the material continuously "throws up - moves - falls" on the vibrating screen surface, simultaneously completing the dynamic screening and separation of coarse and fine materials; graded discharge: the fine powder and irregular particles under the screen are discharged from below the screen surface, and the normal material on the screen moves along the screen surface to the discharge end for discharge, completing the screening operation.

[0068] During screen box installation, the main body of the screen box (side plates, crossbeams, reinforcing ribs) is primarily connected by welding and high-strength bolts. Core structures (such as side plates and crossbeams) are welded first to ensure rigidity, while secondary joints are reinforced with high-strength bolts, balancing strength and future maintenance. Vibrator and screen box: connected with high-strength reamed bolts—the vibrator experiences large vibration loads, and reamed bolts limit radial displacement, preventing loosening. Elastic support device (spring and screen box / foundation): connected via pins and pressure plate bolts—the upper and lower ends of the spring are fixed to the screen box support and foundation support respectively with pins, then locked with pressure plate bolts, both fixing the spring and allowing elastic displacement during vibration. Screen surface and screen box: connected with pressure plates and T-bolts / hooks—flat screen surfaces are pressed against the screen box crossbeams with pressure plates and T-bolts; easily replaceable mesh screens are often quickly fixed with hooks for easy replacement later. Feed / discharge hopper and screen box: connected by flexible connectors (rubber expansion joints) and bolts. The rubber expansion joint can buffer the vibration transmission of the screen box and seal the material to prevent leakage. The two ends are then fixed to the flanges of the hopper and screen box respectively with bolts.

[0069] In one embodiment of this application, an electrostatic generator is placed inside a polymer material flow pipe. Using an electrostatic field, dust particles are charged and then adsorbed onto a dust collection plate under the influence of the electric field, thereby achieving separation of dust and material. In this application, the electrostatic generator can be a conventional electrostatic dust collector installed in the dust collection pipe (504).

[0070] In one embodiment of this application, the top of the dust collection box 1 has a dust collection pipe (504), and an electrostatic generator is installed inside the dust collection pipe. The electrostatic generator includes an electrostatic housing 501, and both ends of the electrostatic housing 501 are respectively provided with connection openings to the discharge pipe of the polymer material flow pipe 4. The electrostatic housing 501 is connected to the middle section of the discharge pipe of the polymer material flow pipe 4 through the connection openings and communicates with the interior of the polymer material flow pipe 4.

[0071] In this embodiment, a plurality of spaced-apart electrode plates 502 are disposed inside the electrostatic housing 501, and a plurality of spaced-apart dust collection plates 503 are disposed on the electrode plates 502. The electrode plates 502 are arranged parallel to the flow direction of the polymer material in the polymer material flow channel 4. The dust collection plates 503 are strip-shaped and protrude from the surface of the electrode plates 502, with adjacent dust collection plates 503 arranged parallel and spaced apart.

[0072] Based on the structure of the electrostatic generator described above, the dust adsorption process in this application is based on the logic of "high-voltage electric field ionization + charge adsorption". High-voltage power supply: After the electrostatic generator is connected to a power source, it converts low-voltage electricity into high-voltage direct current, forming a strong electrostatic field between the dust collection plate 503 and the corresponding electrode. Corona discharge / air ionization: The strong electric field ionizes air molecules within the electric field region, generating a large number of positive and negative ions (this process is called "corona discharge"); Material / dust charging: When dust-laden gas (or target material) passes through the electric field region, the particles adsorb these ions and acquire electrostatic charges; Charge capture: Under the action of the electric field force, the charged particles move towards the dust collection plate with the opposite charge, and are eventually adsorbed and fixed by the dust collection plate, achieving the goals of dust removal and material charging. The shell's function is to enclose the electric field region, protect the internal structure of the equipment, and constrain the passage path of airflow / materials.

[0073] In one embodiment of this application, the air outlet of the high-pressure blower is located at the lower left of the vibrating screen, and the vibrating screen is located directly below the housing.

[0074] In one embodiment of this application, the working characteristic of the high-voltage cable ultra-clean insulation material dust removal and cooling device of this application is to simulate the periodic airflow alternation working mode of tidal rise and fall, including the following stages.

[0075] Positive pressure "high tide" phase (3-5 seconds):

[0076] When the high-pressure air supply equipment is started, it generates a strong upward airflow that penetrates the material layer evenly.

[0077] Airflow impacts the surface of the material, breaking the adhesion between the dust and the material, causing the dust to detach and become suspended;

[0078] The material falls slowly due to gravity, creating a counter-current with the rising airflow, which enhances the dust removal effect.

[0079] Negative pressure "receding" phase (3-5 seconds):

[0080] The airflow direction reverses instantly, switching to a downward suction mode;

[0081] Suspended dust is drawn into the top dust collection pipe and enters the filtration system, where fine powder is adsorbed by the electrostatic generator.

[0082] The clean material continues to fall onto the vibrating screen, moves forward by vibration, and is separated through the discharge port.

[0083] Intelligent cycle (5-10 times / batch):

[0084] The precision control system automatically switches between positive and negative pressure states to form a stable "tidal" rhythm;

[0085] The number of cycles, airflow intensity, and time interval can be precisely adjusted according to the material characteristics.

[0086] Specifically, the working process of the high-voltage cable ultra-clean insulation material dust removal and cooling device of this application is as follows.

[0087] Cross-linked polyethylene insulation material falls freely from the top along the baffle into the material dust removal box. The high-pressure blower, after filtration, generates air that transports the cross-linked polyethylene radially and longitudinally through the bottom and sides, thereby achieving radial forward movement and longitudinal suspension of the material, and removing dust from the material surface. The top of the box uses an exhaust system to achieve dust filtration and collection and air circulation.

[0088] During the longitudinal suspension process, the cross-linked polyethylene material is fully connected to the cooling pipe, and the cooling water in the pipe transfers heat to reduce the temperature of the material, thus achieving the cooling effect.

[0089] Cross-linked polyethylene material, which is conveyed by air and cooled by pipeline, falls onto a vibrating screen under gravity. The high-frequency vibration of the vibrating screen causes the cross-linked polyethylene material to bounce again, further removing the powder from the surface of the material.

[0090] During the process described above, as the material is discharged by gravity through the conveying pipeline, an electrostatic generator installed inside the pipeline starts working. The electrostatic field charges the dust particles, which are then adsorbed onto the dust collection plate under the action of the electric field, thus achieving complete separation of dust and material, thereby achieving ultra-clean material.

[0091] Of course, the above description is not intended to limit this application, nor is this application limited to the examples given above. Any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this application should fall within the protection scope of this application.

Claims

1. A dust removal and cooling device for ultra-clean insulation materials of high-voltage cables, comprising a dust removal chamber (1), wherein the dust removal chamber (1) has a dust removal device inside; characterized in that: The dust removal device includes a high-pressure air supply device (2), the air outlet of which is located on the bottom surface inside the dust removal box (1) and on one of the side surfaces inside the dust removal box (1); The dust removal box (1) has several cooling pipes (3) inside, and the cooling pipes (3) are enclosed and connected to a refrigeration circulation device; The dust removal box (1) is connected to a polymer material flow pipe (4); the polymer material flow pipe (4) includes a feed pipe and a discharge pipe. The feed pipe of the polymer material flow pipe (4) is located on one side of the top of the dust removal box (1) and communicates with the inside of the dust removal box (1); the discharge pipe of the polymer material flow pipe (4) is located on the side of the bottom of the dust removal box (1) and communicates with the inside of the dust removal box (1).

2. The dust removal and cooling device for ultra-clean insulation materials of high-voltage cables according to claim 1, characterized in that: The high-pressure air supply equipment (2) includes a high-pressure blower and a filter. The outlet of the high-pressure blower is connected to the interior of the dust removal box (1) through a pipe. The filter is located in the pipe between the outlet of the high-pressure blower and the dust removal box (1); or the filter is located inside the dust removal box (1) and is installed in conjunction with the outlet of the pipe between the outlet of the high-pressure blower and the dust removal box (1).

3. The dust removal and cooling device for ultra-clean insulation materials of high-voltage cables according to claim 1, characterized in that: The dust removal box (1) is provided with several parallel and spaced partitions (101) inside. The cooling pipe (3) passes through the partitions (101) and is fixed relative to the partitions (101). All cooling pipes (3) are arranged in parallel at intervals; cooling deionized water is introduced into the cooling pipes (3).

4. The dust removal and cooling device for ultra-clean insulation materials of high-voltage cables according to claim 1, characterized in that: The bottom of the dust removal box (1) has a vibrating screen (4); The vibrating screen (4) includes a screen box (401) and a circular vibrating screen vibrator (402); the circular vibrating screen vibrator (402) is located in the middle of the screen box (401); the screen box (401) is installed at the bottom of the dust removal box (1), and the screen box (401) has a screen surface with several screening channels for materials to pass through.

5. The dust removal and cooling device for ultra-clean insulation materials of high-voltage cables according to claim 1, characterized in that: The lower part of the sieve box (401) and the bottom of the powder removal box (1) are provided with a number of elastic support devices (403), and the sieve box (401) is fixed to the powder removal box (1) by the elastic support devices (403); The discharge pipe of the polymer material flow pipe (4) is matched with the discharge end of the vibrating screen (4).

6. The dust removal and cooling device for ultra-clean insulation materials of high-voltage cables according to claim 1, characterized in that: The top of the dust removal box (1) has a dust collection pipe (504), and an electrostatic generator is installed inside the dust collection pipe.

7. The dust removal and cooling device for ultra-clean insulation materials of high-voltage cables according to claim 1, characterized in that: The electrostatic generator includes an electrostatic housing (501), and the two ends of the electrostatic housing (501) are respectively provided with connection openings to the discharge pipe of the polymer material flow pipe (4). The electrostatic housing (501) is connected to the middle section of the discharge pipe of the polymer material flow pipe (4) through the connection openings and communicates with the inside of the polymer material flow pipe (4). The electrostatic housing (501) is provided with a plurality of spaced electrode plates (502), and the electrode plates (502) are provided with a plurality of spaced dust collection plates (503).

8. The dust removal and cooling device for ultra-clean insulation materials of high-voltage cables according to claim 7, characterized in that: The electrode plate (502) is arranged parallel to the polymer material flow direction of the polymer material flow channel (4); The dust collection plate (503) is strip-shaped and protrudes from the surface of the electrode plate (502). Two adjacent dust collection plates (503) are arranged in parallel and spaced apart.

9. The dust removal and cooling device for ultra-clean insulation materials of high-voltage cables according to claim 1, characterized in that: The outlet end of the feed pipe of the polymer material flow pipe (4) is set towards the bottom of the powder removal box (1); The powder box (1) has an inclined guide plate, which is located below the outlet end of the feed pipe of the polymer material flow pipe (4).

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