Vacuum degassing type solid seal pole pouring feed device and using method

Abstract

The application discloses a vacuum degassing type solid-sealed pole column pouring feeding device and a use method thereof, and comprises a liquid material buffer assembly, a primary vacuum main material degassing assembly is sealingly arranged at the bottom of the liquid material buffer assembly and is used for removing large air bubbles in the liquid material, a secondary vacuum fine degassing assembly is sealingly arranged at the bottom of the primary vacuum main material degassing assembly and is used for removing small air bubbles in the liquid material, a variable-diameter steady flow feeding assembly is sealingly arranged at the bottom of the secondary vacuum fine degassing assembly and is used for restraining the flow state and controlling the feeding speed, and the primary vacuum main material degassing assembly and the secondary vacuum fine degassing assembly are connected with a vacuum pumping assembly and are used for providing a stable vacuum environment in the device. Through cooperation of the multi-stage degassing structure, the steady flow feeding structure, the precise temperature control structure and the high-sealing connection structure, the liquid material air bubbles are completely removed, the pouring is uniform and stable, the temperature is precisely controllable, and finally the insulation strength and the mechanical performance of the solid-sealed pole column are improved.

Description

Technical Field

[0001] This invention belongs to the field of solid-sealed electrode casting technology, specifically relating to a vacuum degassing type solid-sealed electrode casting feeding device and its usage method. Background Technology

[0002] As the core insulating component of high-voltage switchgear, the quality of solid-sealed poles directly determines the insulation performance and operational reliability of the switchgear. Epoxy resin vacuum casting is the mainstream manufacturing process for solid-sealed poles. In this process, the degassing effect, feeding stability, and temperature control accuracy of the feeding device are key factors in ensuring that the solid-sealed poles are free of air holes and shrinkage cavities, and that their insulation strength and mechanical properties meet the standards.

[0003] Currently, most solid-sealed electrode casting and feeding devices are simple, straight-through structures with several technical defects: First, the molten material falls directly during the feeding process, easily trapping air. Moreover, degassing is done only once, resulting in incomplete air removal and the formation of pores and shrinkage cavities inside the electrode, severely reducing insulation strength and mechanical properties. Second, the feeding pipeline lacks a flow stabilization structure, resulting in turbulent flow, uneven casting, poor electrode density, and difficulty in ensuring dimensional accuracy. To address these issues, we propose a vacuum degassing type solid-sealed electrode casting and feeding device and its usage method. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum degassing type solid-sealed electrode casting and feeding device and its usage method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a vacuum degassing type solid-sealed electrode casting and feeding device, comprising:

[0006] A liquid buffer assembly is used to temporarily store epoxy resin mixture to be poured;

[0007] A primary vacuum main material degassing component is sealed at the bottom of the liquid buffer component and is used to remove large air bubbles from the liquid.

[0008] A secondary vacuum degassing component is sealed at the bottom of the primary vacuum main material degassing component to remove tiny air bubbles from the liquid and achieve fine degassing.

[0009] A variable diameter constant flow feed assembly is sealed at the bottom of the secondary vacuum degassing assembly to constrain the material flow state and control the feed rate.

[0010] The vacuum assembly, including the primary vacuum main material degassing assembly and the secondary vacuum fine degassing assembly, is connected to the vacuum assembly to provide a stable vacuum environment inside the device.

[0011] Temperature control component, which is used to control the temperature of the device and maintain the flowability of the liquid.

[0012] Preferably, the liquid buffer assembly includes a liquid buffer tank and a filter screen;

[0013] The liquid buffer tank is mounted on the support frame, and the filter screen is disposed inside the liquid buffer tank;

[0014] The upper end of the liquid buffer tank is provided with a liquid inlet, and the bottom of the liquid buffer tank is provided with a conical guide port that is connected to the primary vacuum main material degassing component.

[0015] Preferably, the primary vacuum degassing assembly includes a cylindrical degassing chamber, a spiral guide plate, and a vacuum manifold;

[0016] The upper end of the cylindrical degassing chamber is sealed to the conical guide port at the bottom of the liquid buffer tank via a flange. The spiral guide plate is set inside the cylindrical degassing chamber via a central column. The cylindrical degassing chamber is connected to the vacuum pumping assembly via the vacuum manifold.

[0017] Preferably, the spiral guide plate has at least three turns, the outer edge of the spiral guide plate is fixedly and tightly connected to the inner wall of the cylindrical degassing chamber, and the spiral helix angle of the spiral guide plate is 30-35°.

[0018] Preferably, the secondary vacuum degassing assembly includes a conical degassing chamber, a porous sieve plate, and a vacuum branch pipe;

[0019] The upper end of the conical degassing chamber is sealed to the bottom of the cylindrical degassing chamber by a flange.

[0020] At least two porous sieve plates are provided, and the at least two porous sieve plates are equally spaced in the conical degassing chamber. The upper end of the conical degassing chamber is connected to the vacuum main pipe through the vacuum branch pipe.

[0021] Preferably, the aperture of the porous sieve plate decreases from top to bottom, with each layer decreasing by 0.5 mm.

[0022] Preferably, the variable diameter constant flow feed assembly includes a variable diameter constant flow feed pipe that is thicker at the top and thinner at the bottom. The upper end of the variable diameter constant flow feed pipe is sealed to the bottom of the conical degassing chamber through a flange. A controllable flow regulating valve is provided at the lower part of the variable diameter constant flow feed pipe, and a pneumatic actuator is externally connected to the valve stem of the controllable flow regulating valve.

[0023] Preferably, the vacuum assembly includes a vacuum unit and a vacuum pressure gauge;

[0024] The vacuum unit is mounted on the support frame, and the pumping end of the vacuum unit is connected to the vacuum main pipe;

[0025] The vacuum pressure gauge is installed on the cylindrical degassing chamber and the conical degassing chamber to monitor the vacuum level in real time.

[0026] Preferably, the temperature control component includes a temperature controller, a temperature sensor, and a heating and insulation jacket;

[0027] The heating and insulation jacket is set on the upper outer periphery of the variable diameter constant flow feed pipe, the temperature controller is set on the support frame, and the temperature sensor is set on the lower part of the variable diameter constant flow feed pipe, with its detection probe in contact with the liquid to collect the liquid temperature in real time.

[0028] Both the temperature sensor and the heating and insulation jacket are connected to the temperature controller.

[0029] The outer sides of the liquid buffer tank, the cylindrical degassing chamber, and the conical degassing chamber are all wrapped with a heat insulation layer to reduce heat loss.

[0030] A method for using a vacuum degassing type solid-sealed electrode casting and feeding device includes the following steps:

[0031] A: Equipment preheating and vacuum pretreatment:

[0032] The device is fixedly installed on the support frame. The device is leveled by adjusting the anchor bolts. Then the temperature control component is turned on and the process temperature range is set to 40℃-60℃. Then the heating and insulation jacket is started to preheat the variable diameter constant flow feed pipe. At the same time, the heat insulation layer on the outside of the liquid buffer tank, cylindrical degassing chamber and conical degassing chamber takes effect to maintain the temperature of the chamber.

[0033] Start the vacuum pumping assembly. The vacuum unit simultaneously pumps the primary vacuum main material degassing assembly and the secondary vacuum fine degassing assembly through the vacuum main pipe and vacuum branch pipe until the vacuum degree in the cavity reaches above 0.1MPa, and maintains the vacuum state for standby.

[0034] B: Feed injection and coarse degassing:

[0035] The epoxy resin mixture is injected into the liquid buffer tank through the liquid inlet. After impurities are removed by the filter screen, the mixture falls down along the bottom conical guide port and flows into the cylindrical degassing chamber. It contacts the spiral guide plate on the inner wall of the chamber and flows from top to bottom in a thin film along the spiral trajectory. During this process, the vacuum negative pressure environment in the cylindrical degassing chamber forces the removal of large air bubbles in the mixture, completing the first stage of coarse degassing.

[0036] C: Fine degassing and steady-flow feeding:

[0037] After primary degassing, the mixture flows into the conical degassing chamber of the secondary vacuum fine degassing component. Through at least two equally spaced porous sieves in the chamber, the mixture is broken into fine droplets by the porous sieves. In the environment of decreasing pore size from top to bottom, the micro bubbles are further removed, and the secondary fine degassing is completed.

[0038] After complete degassing, the mixture flows into the variable diameter constant flow feed pipe. The temperature sensor collects the temperature of the liquid in the pipe in real time and feeds it back to the temperature controller. If the temperature is lower than the set value, the heating and insulation jacket will automatically start heating compensation to maintain the fluidity of the liquid.

[0039] D: Vacuum casting:

[0040] Open the controllable flow regulating valve and adjust the feeding speed according to the specifications of the solid-sealed pole so that the mixture is injected into the casting mold at a constant speed through the variable diameter constant flow feed pipe in a laminar flow state. During the casting process, maintain the vacuum inside the device until the mold cavity is filled.

[0041] After the cavity is filled, the controllable flow regulating valve is closed, and the pressure is maintained for 3-5 minutes. Then, the residual mixture in the variable diameter constant flow feed pipe is sucked into the recovery container by the negative pressure in the cavity to complete the casting.

[0042] Compared with the prior art, the beneficial effects of the present invention are:

[0043] 1. Thorough degassing and significantly improved electrode quality: This invention employs a multi-stage degassing structure, consisting of a primary spiral flow degassing stage and a secondary porous sieve plate for fine degassing, combined with a full-process vacuum environment. The material liquid bubble removal rate is ≥99%, completely solving the problem of incomplete degassing in traditional devices. This ensures that the solidified electrode column is free of pores and shrinkage defects. Compared to traditional processes, the electrode column insulation strength is increased by more than 30%, mechanical strength is increased by 25%, and operational reliability is greatly enhanced.

[0044] 2. Uniform pouring and strong adaptability: The variable diameter constant flow feed pipe, combined with the controllable flow regulating valve, ensures that the material flows into the mold in a laminar flow state at a uniform speed, avoiding the problem of uneven pouring caused by turbulence. The poles have uniform density, and the dimensional accuracy is improved by 15%. At the same time, the flow rate can be precisely adjusted, adapting to various specifications of solid-sealed pole molds, with strong versatility and a 20% increase in production efficiency.

[0045] 3. Precise temperature control and stable flow: The temperature control component maintains the liquid temperature precisely within the process range of 40℃-60℃ through the dual action of active heating by the heating and insulation jacket and passive insulation by the insulation layer. This ensures good liquid flow and avoids a decrease in degassing effect due to temperature fluctuations. At the same time, it prevents pipeline blockage due to liquid solidification, reducing maintenance costs by 40%.

[0046] 4. Excellent sealing performance and stable vacuum environment: All connection parts of the device adopt flange sealing connection, and with the unified vacuum supply of the vacuum main pipe and vacuum branch pipe, the vacuum pressure gauge monitors in real time to ensure that the vacuum fluctuation inside the device is ≤0.002MPa, effectively preventing the infiltration of external air and ensuring the vacuum casting effect.

[0047] 5. Convenient operation and maintenance, and high resource utilization: The device can utilize negative pressure to recover residual mixed materials, reducing raw material waste by 15%-20%; all components adopt standardized flange connections, making disassembly and maintenance convenient and improving the efficiency of device operation and maintenance. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0049] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0050] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0051] Figure 4 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0052] Figure 5 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0053] Figure 6 This is a cross-sectional three-dimensional structural diagram of the present invention.

[0054] In the diagram: 1. Liquid buffer assembly; 101. Liquid buffer tank; 102. Filter screen; 103. Liquid inlet; 104. Conical guide port; 2. Primary vacuum main material degassing assembly; 201. Cylindrical degassing chamber; 202. Spiral guide plate; 203. Vacuum main pipe; 204. Central column; 3. Secondary vacuum fine degassing assembly; 301. Conical degassing chamber; 302. Porous sieve plate; 303. Vacuum branch pipe; 4. Variable diameter steady flow feed assembly; 401. Variable diameter steady flow feed pipe; 402. Controllable flow regulating valve; 5. Vacuum assembly; 501. Vacuum unit; 6. Temperature control assembly; 601. Temperature controller; 602. Temperature sensor; 603. Heating and insulation jacket; 7. Support frame. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] Please see Figures 1-6 The vacuum degassing type solid-sealed electrode casting and feeding device provided by the present invention includes:

[0057] The liquid buffer assembly 1 is used to temporarily store the epoxy resin mixture to be poured. The liquid buffer assembly 1 includes a liquid buffer tank 101 and a filter screen 102. The liquid buffer tank 101 is set on the support frame 7, and the filter screen 102 is set inside the liquid buffer tank 101 to filter impurities in the mixture. The upper end of the liquid buffer tank 101 is provided with a liquid inlet 103 for injecting the epoxy resin mixture, and the bottom of the liquid buffer tank 101 is provided with a conical guide port 104 connected to the primary vacuum main material degassing assembly 2 to guide the mixture to fall smoothly and avoid splashing and air entrapment.

[0058] The primary vacuum degassing component 2 is sealed at the bottom of the liquid buffer component 1 to remove large air bubbles from the liquid. The primary vacuum degassing component 2 includes a cylindrical degassing chamber 201, a spiral guide plate 202, and a vacuum manifold 203. The upper end of the cylindrical degassing chamber 201 is sealed to the conical guide port 104 at the bottom of the liquid buffer tank 101 through a flange to ensure sealing performance. The spiral guide plate 202 is set inside the cylindrical degassing chamber 201 through a central column 204. The cylindrical degassing chamber 201 is connected to the vacuum pumping component 5 through the vacuum manifold 203. The spiral guide plate 202 has at least three turns. The outer edge of the spiral guide plate 202 is fixedly and tightly connected to the inner wall of the cylindrical degassing chamber 201. The spiral angle of the spiral guide plate 202 is 30-35°, so that the mixture falls in a thin film along the spiral trajectory, extending the degassing path.

[0059] The secondary vacuum degassing component 3 is sealed at the bottom of the primary vacuum main material degassing component 2. It is used to remove tiny air bubbles from the liquid and achieve fine degassing. The secondary vacuum degassing component 3 includes a conical degassing chamber 301, a porous sieve plate 302, and a vacuum branch pipe 303. The upper end of the conical degassing chamber 301 is sealed to the bottom of the cylindrical degassing chamber 201 through a flange. At least two porous sieve plates 302 are provided, and at least two porous sieve plates 302 are equally spaced in the conical degassing chamber 301. The upper end of the conical degassing chamber 301 is connected to the vacuum main pipe 203 through the vacuum branch pipe 303. The pore size of the porous sieve plates 302 decreases from top to bottom, with each layer decreasing by 0.5 mm, breaking the mixture into fine droplets and further removing tiny air bubbles.

[0060] The variable diameter steady flow feeding assembly 4 is sealed at the bottom of the secondary vacuum degassing assembly 3 to constrain the material flow state and control the feeding speed. The variable diameter steady flow feeding assembly 4 includes a variable diameter steady flow feeding pipe 401 that is thicker at the top and thinner at the bottom. The upper end of the variable diameter steady flow feeding pipe 401 is sealed to the bottom of the conical degassing chamber 301 through a flange, so that the material flow is in a laminar flow state. A controllable flow regulating valve 402 is provided at the lower part of the variable diameter steady flow feeding pipe 401. The valve stem of the controllable flow regulating valve 402 is externally connected to a pneumatic actuator to realize precise adjustment of the feeding speed and adapt to different specifications of pole molds.

[0061] Vacuum assembly 5, primary vacuum main material degassing assembly 2, and secondary vacuum fine degassing assembly 3 are all connected to vacuum assembly 5 to provide a stable vacuum environment inside the device. Vacuum assembly 5 includes vacuum unit 501 and vacuum pressure gauges. Vacuum unit 501 is mounted on support frame 7, and the pumping end of vacuum unit 501 is connected to vacuum main pipe 203. Vacuum pressure gauges are mounted on cylindrical degassing chamber 201 and conical degassing chamber 301 to monitor the vacuum level in real time and ensure that the vacuum level is stable above 0.1 MPa.

[0062] Temperature control component 6 is used to control the temperature of the device and maintain the flowability of the liquid. Temperature control component 6 includes a temperature controller 601, a temperature sensor 602, and a heating and insulation jacket 603. The heating and insulation jacket 603 is set on the upper outer periphery of the variable diameter constant flow feed pipe 401. The temperature controller 601 is set on the support frame 7. The temperature sensor 602 is set on the lower part of the variable diameter constant flow feed pipe 401, and its detection probe is in contact with the liquid to collect the liquid temperature in real time. The temperature sensor 602 and the heating and insulation jacket 603 are both connected to the temperature controller 601. The outer sides of the liquid buffer tank 101, the cylindrical degassing chamber 201, and the conical degassing chamber 301 are all wrapped with heat insulation layers to reduce heat loss and, together with the heating and insulation jacket, accurately maintain the liquid temperature within the process range of 40℃-60℃.

[0063] The method of using the vacuum degassing type solid-sealed electrode casting and feeding device provided by the present invention includes the following steps:

[0064] A: Equipment preheating and vacuum pretreatment:

[0065] The device is fixedly installed on the support frame 7. The device is leveled by adjusting the anchor bolts. Then the temperature control component 6 is turned on and the process temperature range is set to 40℃-60℃. Then the heating and insulation jacket 603 is started to preheat the variable diameter constant flow feed pipe 401. At the same time, the heat insulation layer on the outside of the liquid buffer tank 101, the cylindrical degassing chamber 201 and the conical degassing chamber 301 takes effect to maintain the temperature of the chamber.

[0066] Start the vacuum assembly 5. The vacuum unit 501 simultaneously evacuates the primary vacuum main material degassing assembly 2 and the secondary vacuum fine degassing assembly 3 through the vacuum main pipe 203 and the vacuum branch pipe 303 until the vacuum degree in the cavity reaches above 0.1MPa and is kept in a vacuum state for standby.

[0067] B: Feed injection and coarse degassing:

[0068] The epoxy resin mixture is injected into the liquid buffer tank 101 through the liquid inlet 103. After the mixture is filtered by the filter screen 102 to remove impurities, it falls down along the bottom conical guide port 104 and flows into the cylindrical degassing chamber 201. It contacts the spiral guide plate 202 on the inner wall of the chamber and flows from top to bottom in a thin film along the spiral trajectory. During this process, the vacuum negative pressure environment in the cylindrical degassing chamber 201 forces the removal of large air bubbles in the mixture, completing the first stage of coarse degassing.

[0069] C: Fine degassing and steady-flow feeding:

[0070] After primary degassing, the mixture flows into the conical degassing chamber 301 of the secondary vacuum fine degassing component 3. Through at least two equally spaced porous sieve plates 302 in the chamber, the mixture is broken into fine droplets by the porous sieve plates 302. In the environment of decreasing pore size from top to bottom, the micro bubbles are further removed, and the secondary fine degassing is completed.

[0071] After complete degassing, the mixture flows into the variable diameter constant flow feed pipe 401. The temperature sensor 602 collects the temperature of the liquid in the pipe in real time and feeds it back to the temperature controller 601. If the temperature is lower than the set value, the heating and insulation jacket 603 automatically starts heating compensation to maintain the fluidity of the liquid.

[0072] D: Vacuum casting:

[0073] Open the controllable flow regulating valve 402 and adjust the feeding speed according to the specifications of the solid-sealed pole so that the mixture is injected into the casting mold at a uniform speed through the variable diameter steady flow feed pipe 401 in a laminar flow state. During the casting process, maintain the vacuum inside the device until the mold cavity is filled.

[0074] After the cavity is filled, close the controllable flow regulating valve 402, maintain pressure for 3-5 minutes, and then use the negative pressure in the cavity to suck the residual mixture in the variable diameter steady flow feed pipe 401 into the recovery container to complete the casting.

[0075] Compared with the prior art, the present invention has the following advantages:

[0076] 1. Thorough degassing and significantly improved electrode quality: This invention employs a multi-stage degassing structure, consisting of a primary spiral flow degassing stage and a secondary porous sieve plate for fine degassing, combined with a full-process vacuum environment. The material liquid bubble removal rate is ≥99%, completely solving the problem of incomplete degassing in traditional devices. This ensures that the solidified electrode column is free of pores and shrinkage defects. Compared to traditional processes, the electrode column insulation strength is increased by more than 30%, mechanical strength is increased by 25%, and operational reliability is greatly enhanced.

[0077] 2. Uniform pouring and strong adaptability: The variable diameter constant flow feed pipe, combined with the controllable flow regulating valve, ensures that the material flows into the mold in a laminar flow state at a uniform speed, avoiding the problem of uneven pouring caused by turbulence. The poles have uniform density, and the dimensional accuracy is improved by 15%. At the same time, the flow rate can be precisely adjusted, adapting to various specifications of solid-sealed pole molds, with strong versatility and a 20% increase in production efficiency.

[0078] 3. Precise temperature control and stable flow: The temperature control component maintains the liquid temperature precisely within the process range of 40℃-60℃ through the dual action of active heating by the heating and insulation jacket and passive insulation by the insulation layer. This ensures good liquid flow and avoids a decrease in degassing effect due to temperature fluctuations. At the same time, it prevents pipeline blockage due to liquid solidification, reducing maintenance costs by 40%.

[0079] 4. Excellent sealing performance and stable vacuum environment: All connection parts of the device adopt flange sealing connection, and with the unified vacuum supply of the vacuum main pipe and vacuum branch pipe, the vacuum pressure gauge monitors in real time to ensure that the vacuum fluctuation inside the device is ≤0.002MPa, effectively preventing the infiltration of external air and ensuring the vacuum casting effect.

[0080] 5. Convenient operation and maintenance, and high resource utilization: The device can utilize negative pressure to recover residual mixed materials, reducing raw material waste by 15%-20%; all components adopt standardized flange connections, making disassembly and maintenance convenient and improving the efficiency of device operation and maintenance.

[0081] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum degassing type solid-sealed electrode casting and feeding device, characterized in that, include: Liquid buffer component (1) is used to temporarily store epoxy resin mixture to be poured; A primary vacuum main material degassing component (2) is sealed at the bottom of the liquid buffer component (1) to remove large air bubbles from the liquid. The secondary vacuum degassing component (3) is sealed at the bottom of the primary vacuum main material degassing component (2) and is used to remove tiny bubbles in the liquid material to achieve fine degassing. The variable diameter constant flow feed assembly (4) is sealed at the bottom of the secondary vacuum fine degassing assembly (3) to constrain the material flow state and control the feed speed. The vacuum assembly (5) is connected to the primary vacuum main material degassing assembly (2) and the secondary vacuum fine degassing assembly (3) to provide a stable vacuum environment inside the device. Temperature control component (6) is used to control the temperature of the device and maintain the fluidity of the liquid.

2. The vacuum degassing type solid-sealed electrode casting and feeding device according to claim 1, characterized in that: The liquid buffer assembly (1) includes a liquid buffer tank (101) and a filter screen (102). The liquid buffer tank (101) is mounted on the support frame (7), and the filter screen (102) is mounted inside the liquid buffer tank (101); The upper end of the liquid buffer tank (101) is provided with a liquid inlet (103), and the bottom of the liquid buffer tank (101) is provided with a conical guide port (104) connected to the primary vacuum main material degassing component (2).

3. The vacuum degassing type solid-sealed electrode casting and feeding device according to claim 2, characterized in that: The primary vacuum main material degassing assembly (2) includes a cylindrical degassing chamber (201), a spiral guide plate (202), and a vacuum manifold (203). The upper end of the cylindrical degassing chamber (201) is connected to the conical guide port (104) at the bottom of the liquid buffer tank (101) by a flange seal. The spiral guide plate (202) is set inside the cylindrical degassing chamber (201) through the central column (204). The cylindrical degassing chamber (201) is connected to the vacuum pumping assembly (5) through the vacuum manifold (203).

4. The vacuum degassing type solid-sealed electrode casting and feeding device according to claim 3, characterized in that: The spiral guide plate (202) is provided with at least three turns. The outer edge of the spiral guide plate (202) is fixedly and tightly connected to the inner wall of the cylindrical degassing chamber (201), and the spiral angle of the spiral guide plate (202) is 30-35°.

5. The vacuum degassing type solid-sealed electrode casting and feeding device according to claim 3, characterized in that: The secondary vacuum degassing assembly (3) includes a conical degassing chamber (301), a porous sieve plate (302), and a vacuum branch pipe (303). The upper end of the conical degassing chamber (301) is sealed to the bottom of the cylindrical degassing chamber (201) by a flange. At least two porous sieve plates (302) are provided, and at least two porous sieve plates (302) are equally spaced in the conical degassing chamber (301). The upper end of the conical degassing chamber (301) is connected to the vacuum main pipe (203) through the vacuum branch pipe (303).

6. The vacuum degassing type solid-sealed electrode casting and feeding device according to claim 5, characterized in that: The aperture of the porous sieve plate (302) decreases from top to bottom, with each layer decreasing by 0.5 mm.

7. The vacuum degassing type solid-sealed electrode casting and feeding device according to claim 5, characterized in that: The variable diameter constant flow feed assembly (4) includes a variable diameter constant flow feed pipe (401) that is thicker at the top and thinner at the bottom. The upper end of the variable diameter constant flow feed pipe (401) is sealed to the bottom of the conical degassing chamber (301) by a flange. A controllable flow regulating valve (402) is provided at the lower part of the variable diameter constant flow feed pipe (401). A pneumatic actuator is externally connected to the valve stem of the controllable flow regulating valve (402).

8. The vacuum degassing type solid-sealed electrode casting and feeding device according to claim 7, characterized in that: The vacuum assembly (5) includes a vacuum unit (501) and a vacuum pressure gauge; The vacuum unit (501) is mounted on the support frame (7), and the pumping end of the vacuum unit (501) is connected to the vacuum main pipe (203); The vacuum pressure gauge is installed on the cylindrical degassing chamber (201) and the conical degassing chamber (301) for real-time monitoring of the vacuum level.

9. The vacuum degassing type solid-sealed electrode casting and feeding device according to claim 8, characterized in that: The temperature control component (6) includes a temperature controller (601), a temperature sensor (602), and a heating and insulation jacket (603). The heating and insulation jacket (603) is set on the upper outer periphery of the variable diameter constant flow feed pipe (401), the temperature controller (601) is set on the support frame (7), and the temperature sensor (602) is set on the lower part of the variable diameter constant flow feed pipe (401), with its detection probe in contact with the liquid to collect the liquid temperature in real time. The temperature sensor (602) and the heating and insulation jacket (603) are both connected to the temperature controller (601); The outer sides of the liquid buffer tank (101), the cylindrical degassing chamber (201), and the conical degassing chamber (301) are all wrapped with heat insulation layers to reduce heat loss.

10. A method of using a vacuum degassing type solid-sealed electrode casting and feeding device according to any one of claims 1-9, characterized in that, Includes the following steps: A: Equipment preheating and vacuum pretreatment: The device is fixedly installed on the support frame (7). The device is leveled by adjusting the anchor bolts. Then the temperature control component (6) is turned on and the process temperature range is set to 40℃-60℃. Then the heating and insulation jacket (603) is started to preheat the variable diameter constant flow feed pipe (401). At the same time, the heat insulation layer on the outside of the liquid buffer tank (101), the cylindrical degassing chamber (201) and the conical degassing chamber (301) takes effect to maintain the temperature of the chamber. Start the vacuum assembly (5). The vacuum unit (501) simultaneously evacuates the primary vacuum main material degassing assembly (2) and the secondary vacuum fine degassing assembly (3) through the vacuum main pipe (203) and the vacuum branch pipe (303) until the vacuum degree in the cavity reaches above 0.1MPa and is kept in vacuum state for standby. B: Feed injection and coarse degassing: The epoxy resin mixture is injected into the liquid buffer tank (101) through the liquid inlet (103). After the mixture is filtered by the filter screen (102) to remove impurities, it falls down along the bottom conical guide port (104) and flows into the cylindrical degassing chamber (201). It contacts the spiral guide plate (202) on the inner wall of the chamber and flows from top to bottom in a thin film along the spiral trajectory. During this process, the vacuum negative pressure environment in the cylindrical degassing chamber (201) forces the removal of large air bubbles in the mixture, completing the first stage of coarse degassing. C: Fine degassing and steady-flow feeding: After primary degassing, the mixture flows into the conical degassing chamber (301) of the secondary vacuum fine degassing component (3). Through at least two equally spaced porous sieve plates (302) in the chamber, the mixture is broken into fine droplets by the porous sieve plates (302). In the environment of decreasing pore size from top to bottom, the micro bubbles are further removed, and the secondary fine degassing is completed. After complete degassing, the mixture flows into the variable diameter constant flow feed pipe (401). The temperature sensor (602) collects the temperature of the liquid in the pipe in real time and feeds it back to the temperature controller (601). If the temperature is lower than the set value, the heating and insulation jacket (603) automatically starts heating compensation to maintain the fluidity of the liquid. D: Vacuum casting: Open the controllable flow regulating valve (402), and adjust the feeding speed according to the specifications of the solid-sealed pole so that the mixture is injected into the casting mold at a constant speed through the variable diameter steady flow feed pipe (401) in a laminar flow state. During the casting process, keep the vacuum inside the device stable until the mold cavity is filled. After the cavity is filled, close the controllable flow regulating valve (402), maintain pressure for 3-5 minutes, and then use the negative pressure in the cavity to suck the residual mixture in the variable diameter steady flow feed pipe (401) into the recovery container to complete the casting.

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