Additive manufacturing equipment for high-voltage insulation shielding cover

Abstract

The invention discloses additive manufacturing equipment for a high-voltage insulation shielding cover. The additive manufacturing equipment comprises a base, a printing assembly, a protection assembly and an adjusting assembly. The printing assembly is arranged on the base, the protection assembly is arranged on the base, and the adjusting assembly is arranged in the protection assembly; through the design that the adjusting device is matched with the exhaust mechanism and the air guide cavity is matched with the annular exhaust hole, a vertical laminar flow air curtain can be formed, so that suspended impurities in the cabin are physically blocked, and the cleanliness of a printed piece is guaranteed; through linkage of the adjusting device, the exhaust mechanism and the first air suction cover, airflow flows through the spray head to achieve heat dissipation, dried and destaticized air diffuses the whole cabin, the temperature, humidity and static electricity are balanced, and the manufacturing stability is improved; a door area air curtain is constructed through the adjusting device, the exhaust pipe and the second suction hood, impurities in a door area are purified when the door is closed, external dusty air is blocked when the door is opened, and environmental parameter sudden change interference is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage insulation shielding covers, in particular to an additive manufacturing equipment for high-voltage insulation shielding covers. BACKGROUND

[0002] High-voltage insulation shielding covers are key insulation components in power equipment, and the reliability of their performance is directly related to the safe and stable operation of the entire power system. Traditional shielding covers are mostly manufactured by injection molding or molding process, which has limitations such as high mold cost, long production cycle, and difficulty in achieving integrated molding of complex structures. Additive manufacturing (3D printing) technology, especially printing technology based on high-temperature engineering plastics (such as PEEK, PEI), provides a new solution for the rapid and flexible manufacturing of high-voltage insulation shielding covers.

[0003] However, when applying 3D printing technology to the manufacturing of high-voltage insulation parts (Feng Lei. Electrical insulation performance of fused deposition modeling plastic parts[D]. Chongqing University of Technology, 2021.), suspended dust in the air, trace particles volatilized from the material itself, and impurities attracted by static electricity may be embedded in the forming blank during the printing process, forming local insulation weak points. These microscopic defects are extremely prone to becoming breakdown initiation points under a high-voltage electric field, which seriously threatens the insulation reliability of the product and restricts the high-quality application of 3D printing technology in this high-end field. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide an additive manufacturing equipment for high-voltage insulation shielding covers, which avoids the embedding of environmental dust and electrostatically attracted impurities into the blank during 3D printing of high-voltage insulation parts, and realizes high-quality manufacturing of high-voltage insulation shielding covers.

[0005] In order to achieve the above purpose, the technical solution adopted by the present application is as follows: An additive manufacturing equipment for high-voltage insulation shielding covers, comprising a base, a printing assembly, a protection assembly, and an adjusting assembly; The printing assembly is arranged on the base and is used to manufacture high-voltage insulation shielding covers through 3D printing; The protection assembly is arranged on the base and outside the printing assembly, and is used to protect the internal mechanism and prevent external impurities from interfering with the 3D printing process; The adjusting assembly is arranged inside the protection assembly, and is used to remove dust from the device, protect the high-voltage insulation shielding cover during 3D printing to prevent dust from affecting the printing effect, and at the same time, cool the internal printing assembly and adjust the humidity in the protection assembly.

[0006] The protection assembly comprises a protection cabin and a cover plate, the protection cabin is installed on the base, the cover plate is installed on the front side of the protection cabin through a hinge, a hole is formed in the cover plate, and a transparent protection plate is arranged in the hole; and an auxiliary heating unit is arranged in the protection cabin.

[0007] The printing assembly comprises a printing platform installed on the base and support plates symmetrically arranged on the inner wall of the protection cabin, first linear modules for driving the printing platform to move up and down are symmetrically arranged on the two sides of the printing platform, second linear modules are arranged on the two support plates respectively, a third linear module is arranged between the two second linear modules, and the third linear module is installed with a printing nozzle through a connecting piece; the second linear modules are used for driving the third linear module to move forward and backward, and the third linear module is used for driving the printing nozzle to move left and right.

[0008] A sliding rail is arranged on the third linear module, and a sliding block that is in sliding cooperation with the sliding rail is arranged on the printing nozzle, and the sliding block is slidingly assembled on the sliding rail.

[0009] Sliding rods are arranged on the base and close to the four corners of the printing platform, sliding holes are formed in the printing platform and correspond to the positions of the sliding rods, and the sliding holes are slidingly connected with the sliding rods through linear bearings.

[0010] The adjusting assembly comprises an adjusting device installed on the top of the protection cabin, and an exhaust mechanism connected to the bottom of the adjusting device; the adjusting device is connected with a second air suction cover and a plurality of symmetrically arranged first air suction covers through a multi-way pipe, the first air suction cover is arranged at the lower part of the protection cabin, and the exhaust mechanism is located directly above the support plate.

[0011] The exhaust mechanism is provided with a connecting pipe, a gas guide cavity is formed in the connecting pipe and is in communication with the connecting pipe; and a plurality of exhaust holes that are arranged in a ring shape and are in communication with the gas guide cavity are formed in the bottom of the exhaust mechanism.

[0012] The adjusting device is internally provided with an air inlet device, an air exhaust device, an air purification device, an air drying device and an ion generator, the air inlet device is in communication with the multi-way pipe, the air exhaust device is in communication with the connecting pipe, and the air inlet device, the air exhaust device, the air purification device, the air drying device and the ion generator are connected with each other and form a communication structure.

[0013] The connecting pipe is connected with an exhaust pipe through a pipeline, the second air suction cover and the exhaust pipe are installed on the two sides of the cover plate in the interior of the protection cabin, and a plurality of circular holes that are distributed at equal intervals are formed in the side of the exhaust pipe that faces the second air suction cover.

[0014] Compared with the prior art, the present application has the following beneficial effects: 1、Through the adjusting device and the exhaust mechanism, the adjusting device cooperates with the static pressure balance design of the guide cavity of the exhaust mechanism and the uniform distribution of the annular exhaust hole, a stable vertical laminar air curtain from top to bottom can be formed, the air curtain can physically block the suspended impurities in the cabin, such as material volatile particles and dust, to avoid contact with the printing area and the high-voltage insulation shielding cover blank, avoid the weak point of insulation caused by impurities embedded, and protect the surface cleanliness of the printed part.

[0015] 2、Through the adjusting device, the exhaust mechanism and the first air suction cover, when the adjusting device cooperates with the exhaust mechanism, then the first air suction cover sucks air, the airflow directly flows through the periphery of the printing nozzle, cooperates with the active temperature control of the temperature control unit in the adjusting device, can take away the heat generated by the printing nozzle work, prevent the nozzle failure or the thermal deformation of the printed part caused by heat accumulation; and the clean, dry and static-free air treated by the drying device and the ion generator, is diffused to the whole cabin through the air curtain, so that the humidity and static level in the cabin are kept balanced, avoid the forming defects caused by local parameter fluctuation, improve the stability of the high-voltage insulation shielding cover manufacturing.

[0016] 3、Through the adjusting device, the exhaust pipe and the second air suction cover, the door side exhaust pipe and the second air suction cover can form a dynamic air curtain inside the cover plate, in the closed state, the air curtain continuously flows through the door area space, which can purify the impurities remaining around the door body; when the door is opened, the air curtain forms a flexible air flow barrier, which can block the external dust-containing air from flowing into the core printing area, and can prevent the interference of environmental parameter mutation on the printing process, thereby avoiding the pain point of traditional equipment that is easy to introduce pollutants when the door is opened. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic diagram of the embodiment of the application.

[0018] Figure 2 It is an enlarged structure schematic diagram of the protection assembly of the embodiment of the application.

[0019] Figure 3 It is an enlarged structure schematic diagram of the printing assembly of the embodiment of the application.

[0020] Figure 4 It is an enlarged structure schematic diagram of the adjusting assembly of the embodiment of the application.

[0021] Figure 5 It is an enlarged structure schematic diagram of the exhaust mechanism of the embodiment of the application.

[0022] Figure 6 It is an enlarged structure schematic diagram of the exhaust mechanism of the embodiment of the application.

[0023] The figure label: 1, base; 2, protection assembly; 201, protection cabin; 202, cover plate; 3, printing assembly; 301, slide bar; 302, first linear module; 303, printing platform; 304, support plate; 305, second linear module; 306, third linear module; 307, printing nozzle; 4, adjusting assembly; 401, adjusting device; 402, exhaust mechanism; 40201, connecting pipe; 40202, air guide cavity; 40203, exhaust hole; 403, exhaust pipe; 404, first air suction cover; 405, second air suction cover. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the examples and drawings, but the present application can be realized in different forms and is not limited to the examples described in the text.

[0025] As shown in Figure 1 , an additive manufacturing equipment of high-voltage insulation shielding cover includes a base 1, a printing assembly 3, a protection assembly 2 and an adjusting assembly 4; The printing assembly 3 is arranged on the base 1 and is used for manufacturing the high-voltage insulation shielding cover through 3D printing; The protection assembly 2 is arranged on the base 1 and outside the printing assembly 3 and is used for protecting the internal mechanism and preventing external impurities from interfering with the 3D printing process; The adjusting assembly 4 is arranged inside the protection assembly 2 and is used for removing dust in the device, protecting the high-voltage insulation shielding cover in the 3D printing process to avoid the influence of dust on the printing effect, simultaneously cooling the printing assembly 3 inside and adjusting the humidity in the protection assembly 2.

[0026] As shown in Figure 1 , Figure 2 The protection assembly 2 includes a protection cabin 201 and a cover plate 202, the protection cabin 201 is installed on the base 1, the cover plate 202 is installed on the front side of the protection cabin 201 through a hinge, a hole is formed in the cover plate 202, a transparent protection plate is arranged in the hole, the transparent protection plate can be a transparent acrylic plate, and an auxiliary heating unit is arranged in the protection cabin 201. Through the above structure, a closed printing environment core cabin can be constructed, which plays a physical isolation and protection role, can prevent external dust pollution, personnel mis-touching and temperature fluctuation from interfering with the printing process, provides a basic guarantee for high-quality printing; and through the cover plate 202 with the transparent protection plate, the operating personnel can intuitively observe the internal printing state and the working condition of the printing nozzle 307 without opening the cabin door, which is convenient for real-time monitoring and fault diagnosis.

[0027] As shown in Figure 1 , Figure 3As shown, the printing assembly 3 comprises a printing platform 303 mounted on the base 1, and support plates 304 symmetrically arranged on the inner wall of the protective cabin 201; the printing platform 303 is symmetrically provided with first linear modules 302 on both sides for driving the up and down movement thereof, the two support plates 304 are respectively connected with second linear modules 305, and the two second linear modules 305 are connected with a third linear module 306, the third linear module 306 is mounted with a printing nozzle 307 through a connecting piece, the second linear modules 305 are used to drive the third linear module 306 to move back and forth, and the third linear module 306 is used to drive the printing nozzle 307 to move left and right. Through the above structure, the stable movement of the printing nozzle 307 and the printing platform 303 in the three-dimensional space can be realized, the printing platform 303 is driven by the two first linear modules 302 to move accurately in the Z-axis direction, the printing nozzle 307 is driven by the two second linear modules 305 to move in the Y-axis direction, and the printing nozzle 307 is driven by the third linear module 306 to move in the X-axis direction, the first linear modules 302 and the second linear modules 305 are synchronously controlled by the same servo driver, and the position closed-loop feedback is performed through a grating ruler, so that the synchronous precision of movement is ensured to be less than or equal to 0.01 mm.

[0028] As shown in the Figure 3 , the third linear module 306 is provided with a sliding rail, the printing nozzle 307 is connected with a sliding block matched with the sliding rail, and the sliding block is slidingly assembled on the sliding rail. Through the above structure, the cooperation of the sliding block and the sliding rail is a high-precision and high-rigidity linear motion guiding mode, which can ensure the straightness and stability of the movement of the printing nozzle 307 in the X-axis direction, and avoid shaking and deviation, and the structure can withstand a certain torque, thereby enhancing the stability of the printing nozzle 307 in a complex motion track.

[0029] As shown in the Figure 3 , the base 1 is provided with a slide rod 301 near each corner of the printing platform 303, the printing platform 303 is provided with a slide hole corresponding to the slide rod 301, the slide hole is slidingly connected with the slide rod 301 through a linear bearing, and the top of the slide rod 301 is connected with the corresponding support plate 304. Through the above structure, the cooperation of the slide rod 301 arranged at the four corners and the linear bearing provides accurate guidance for the vertical lifting of the printing platform 303, which can prevent the printing platform 303 from tilting, jamming or shaking during lifting, the linear bearing has a small friction coefficient and smooth movement, which can ensure the stability of the movement of the printing platform 303, the slide rod 301 and the linear bearing are made of GCr15 bearing steel, and are provided with a dustproof corrugated sleeve.

[0030] As shown in the Figure 1 , Figure 4As shown, the adjusting assembly 4 comprises an adjusting device 401 mounted on the top of the protection cabin 201, the bottom of the adjusting device 401 is connected with an exhaust mechanism 402, the adjusting device 401 is communicated with a second air suction cover 405 and a plurality of symmetrically arranged first air suction covers 404 through a multi-way pipe, the first air suction covers 404 are arranged at the lower part of the protection cabin 201, and the exhaust mechanism 402 is located directly above the support plate 304. Through the above structure, the adjusting device 401 is integrated on the top, the upper exhaust mechanism 402 is supplied with air through the multi-way pipe, and the vertical laminar flow from top to bottom is constructed; the adjusting device 401 can extract air through the first air suction covers 404 and the second air suction cover 405, so that the air circulation function can be realized.

[0031] As shown in Figure 4 , Figure 5 、 Figure 6 As shown, the exhaust mechanism 402 is provided with a connecting pipe 40201, an air guide cavity 40202 is arranged in the connecting pipe 40201, a plurality of exhaust holes 40203 are arranged at the bottom of the exhaust mechanism 402 in a ring shape and are communicated with the air guide cavity 40202. Through the above structure, the air guide cavity 40202 can play the role of a static pressure tank, can reduce the flow rate of gas in the cavity and balance the pressure, then the gas is uniformly and slowly exhausted through the plurality of exhaust holes 40203 arranged in a ring shape at the bottom, a ring-shaped air curtain from top to bottom is formed, the air curtain can block external impurities, so that the printing effect is not disturbed.

[0032] As shown in Figure 4As shown, the adjusting device 401 is internally provided with an air inlet device, an air outlet device, an air purification device, an air drying device and an ion generator, the air inlet device is communicated with the multi-way pipe, the air outlet device is communicated with the connecting pipe 40201, the air inlet device, the air outlet device, the air purification device, the air drying device and the ion generator are connected with each other and form a communication structure, in addition, a temperature control unit is integrated in the structure, and the air circulating in the communication structure can be cooled or refrigerated to realize active temperature control. Through the above structure, the air purification, drying and ion generation functions are integrated in one device, and the devices work cooperatively, the flowing air can be sequentially treated into clean, dry and static-free air, and then is sent into the cabin again, so that the environmental parameters such as cleanliness, humidity and static level are ensured, clean and dry air is provided for printing, the air purification device adopts a H13 grade HEPA high-efficiency filter, and the filtering efficiency of particles greater than or equal to 0.3 microns is not less than 99.97%; the ion generator is a direct current corona type ion rod, which can generate positive and negative ions with a density of 10^4-10^6 ions / cm³, so that the static potential in the cabin is maintained within ±50V; the air drying device is a condensation type dehumidification module, which can control the dew point temperature of the circulating air below-10℃, and the temperature control unit includes a semiconductor refrigeration sheet (TEC) and a PID controller, which constitute a closed loop feedback with the thermocouple arranged near the printing nozzle 307, and the ambient temperature around the nozzle is stably controlled within the range of ±2℃ of the best forming temperature of the material.

[0033] As shown in Figure 4 , Figure 6 As shown, the connecting pipe 40201 is connected with an exhaust pipe 403 through a pipeline, the second air suction cover 405 and the exhaust pipe 403 are respectively installed on the two sides of the cover plate 202 inside the protective cabin 201, and a plurality of equidistantly distributed round holes are formed in the side of the exhaust pipe 403 facing the second air suction cover 405. Through the above structure, the second air suction cover 405 and the exhaust pipe 403 with round holes construct a small air flow circuit on the inner side of the door body: the clean air sent out through the round holes of the exhaust pipe 403 flows through the door area space and is continuously sucked by the second air suction cover 405, the air flow can form a stable air curtain on the inner surface of the door body, which can block the external air from flowing into the core area at the moment of opening the door, and can also keep the inner wall of the door area clean, and can also remove the pollutants that may penetrate when the door is opened.

[0034] The specific operation process of the present application is as follows: the operator selects the high-voltage insulation shielding cover model and the material type such as PEEK, PEI, etc. through the man-machine interface. After the central controller receives the instruction, the optimal environmental parameter configuration file corresponding to the material is called from the built-in material database.

[0035] The central controller first starts the air inlet device, air purification device, air drying device and ion generator in the adjusting device 401. At the same time, the fan connected with the first air suction cover 404 and the second air suction cover 405 is started to start sucking the air in the protective cabin 201.

[0036] The processed clean, dry and static-free air forms a uniform vertical laminar flow through the top exhaust mechanism 402 and the annular exhaust hole 40203 at the bottom, and the air flow flows downward and can carry away the initial pollutants, and then is sucked back by the first air suction cover 404 at the lower part, to complete the first air circulation and establish a preliminary clean environment. The temperature and humidity sensor and the particle sensor in the box monitor the data in real time and feed back to the central controller until the environmental parameters reach the set value.

[0037] When the environment is stable, the central controller instructs the printing assembly 3 to start working, and the two first linear modules 302 drive the printing platform 303 to move up and down along the slide rod 301 in the Z-axis; the two second linear modules 305 and the third linear modules 306 drive the printing nozzle 307 to move in the XY plane with high precision and high stability, to complete printing.

[0038] During the printing process, when the temperature in the cabin is too high, the controller can instruct to increase the air flow, and at the same time, start the temperature control unit to cool or refrigerate the air, and then evenly distribute the air through the air guide cavity 40202 of the exhaust mechanism 402, and strengthen the air outlet from the exhaust hole 40203 to prevent heat accumulation from causing deformation of the part.

[0039] The particle sensor in the equipment continuously monitors the air cleanliness, and when the concentration of particulate matter increases due to the trace volatilization of the material or abnormal printing such as stringing, the controller will immediately increase the fan power to enhance the overall air exchange efficiency and ensure that the pollutants are quickly removed.

[0040] At the same time, when the door cover plate 202 is in the closed or open state, the air circulation in the door area will continue to work, and the air sent out by the circular hole of the exhaust pipe 403 flows through the door area and is sucked into the second air suction cover 405, forming a dynamic air curtain. When the door is opened, the air curtain can block external pollutants; after the door is closed, the air loop can quickly purify the door area to help restore the internal environment.

[0041] When the printing is completed, if annealing is required to eliminate internal stress, the central controller can start the auxiliary heating unit integrated in the cabin, such as an infrared heating pipe, to perform in-situ heat treatment on the printed part according to the preset temperature curve.

[0042] The HEPA filter is designed with a pressure difference sensor, and when the pressure difference exceeds 250 Pa, the human-machine interface prompts replacement, and the replacement cycle is expected to be 6-12 months (depending on the use environment).

[0043] The application is described above by way of example with reference to the accompanying drawings, and it is obvious that the specific implementation of the application is not limited to the above-described manner, and as long as such non-essential improvements are made by adopting the method concept and technical solutions of the application, or the concept and technical solutions of the application are directly applied to other occasions without improvement, they are all within the protection scope of the application.

Claims

1. An additive manufacturing apparatus for a high-voltage insulating shield, characterized in that, Includes a base (1), a printing component (3), a protective component (2), and an adjustment component (4); The printing component (3) is mounted on the base (1) and is used to manufacture a high-voltage insulating shield by 3D printing; The protective component (2) is set on the base (1) and on the outside of the printing component (3) to protect the internal mechanism and prevent external impurities from interfering with the 3D printing process; The adjustment component (4) is located inside the protective component (2) and is used to remove dust from the device, protect the high-voltage insulation shield during the 3D printing process from dust affecting the printing effect, dissipate heat for the internal printing component (3), and regulate the humidity inside the protective component (2).

2. The additive manufacturing equipment for a high-voltage insulating shielding cover according to claim 1, characterized in that: The protective component (2) includes a protective chamber (201) and a cover plate (202). The protective chamber (201) is installed on the base (1). The cover plate (202) is installed on the front side of the protective chamber (201) by a hinge. The cover plate (202) has holes and transparent protective plates are installed in the holes. An auxiliary heating unit is installed inside the protective chamber (201).

3. The additive manufacturing equipment for a high-voltage insulating shield according to claim 2, characterized in that: The printing assembly (3) includes a printing platform (303) mounted on a base (1) and support plates (304) symmetrically arranged on the inner wall of the protective chamber (201). The printing platform (303) is symmetrically provided with first linear modules (302) for driving its up and down movement on both sides. The two support plates (304) are respectively provided with second linear modules (305). A third linear module (306) is provided between the two second linear modules (305). The third linear module (306) is equipped with a print head (307) through a connector. The second linear modules (305) are used to drive the third linear module (306) to move back and forth, and the third linear module (306) is used to drive the print head (307) to move left and right.

4. The additive manufacturing equipment for a high-voltage insulating shield according to claim 3, characterized in that: The third linear module (306) is provided with a slide rail, and the print head (307) is provided with a slider that slides and engages with the slide rail. The slider is slidably mounted on the slide rail.

5. The additive manufacturing equipment for a high-voltage insulating shield according to claim 3, characterized in that: Slide rods (301) are provided on the base (1) and at the four corners near the printing platform (303). Slide holes are provided on the printing platform (303) at the positions corresponding to the slide rods (301). The slide holes are slidably connected to the slide rods (301) through linear bearings. The top of the slide rods (301) is connected to the corresponding support plate (304).

6. The additive manufacturing equipment for a high-voltage insulating shield according to claim 3, characterized in that: The adjustment assembly (4) includes an adjustment device (401) installed on the top of the protective cabin (201), and an exhaust mechanism (402) connected to the bottom of the adjustment device (401). The adjustment device (401) is connected to a second air intake hood (405) and a plurality of symmetrically arranged first air intake hoods (404) through a multi-port pipe. The first air intake hoods (404) are located at the lower part of the protective cabin (201), and the exhaust mechanism (402) is located directly above the support plate (304).

7. The additive manufacturing equipment for a high-voltage insulating shield according to claim 6, characterized in that: The exhaust mechanism (402) is provided with a connecting pipe (40201), and an air guide chamber (40202) communicating with the connecting pipe (40201) is provided inside it; the bottom of the exhaust mechanism (402) is provided with a plurality of exhaust holes (40203) arranged in a ring and communicating with the air guide chamber (40202).

8. The additive manufacturing equipment for a high-voltage insulating shield according to claim 7, characterized in that: The regulating device (401) is equipped with an air intake device, an exhaust device, an air purification device, an air drying device and an ion generator. The air intake device is connected to a multi-port pipe, and the exhaust device is connected to a connecting pipe (40201). The air intake device, the exhaust device, the air purification device, the air drying device and the ion generator are interconnected and form a connected structure.

9. The additive manufacturing equipment for a high-voltage insulating shield according to claim 7, characterized in that: The connecting pipe (40201) is connected to the exhaust pipe (403) through the pipe. The second air intake hood (405) and the exhaust pipe (403) are respectively installed on both sides of the protective chamber (201) near the cover plate (202). The exhaust pipe (403) has multiple equally spaced round holes on the side facing the second air intake hood (405).

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