Anti-static vacuum feeding machine

Abstract

The utility model discloses a kind of anti-static vacuum feeding machine, it is related to feeding equipment technical field, including including feeding machine, vacuum pump, feed pipe, discharge assembly, antistatic coating, grounding assembly and ion wind generating component, vacuum pump is fixedly arranged on feeding machine by support.The utility model is prevented through the setting antistatic coating, grounding assembly and ion wind generating component multidimensional antistatic system, from preventing charge accumulation, leading away charge that has been generated, neutralize material charge carrying three aspects synergistic effect, antistatic effect is more comprehensive, more stable, effectively solve material adsorption, electrostatic discharge etc. Problem, production safety and material conveying efficiency are guaranteed;Through the setting material humidity detection unit and negative pressure adjusting component, according to material humidity, internal negative pressure etc. Actual working condition of feeding machine, dynamically adjust ion wind output intensity and internal negative pressure, so that anti-static measure can adapt to the demand of different material, different working condition, improve the applicability and reliability of equipment.

Description

Technical Field

[0001] This utility model relates to the field of feeding equipment technology, specifically an anti-static vacuum feeding machine. Background Technology

[0002] Vacuum feeders are devices that use the principle of vacuum negative pressure to transport materials. They are widely used in industries such as chemical, pharmaceutical, food, and electronics. They can automate the feeding of powders, granules, and other materials, effectively improving production efficiency and reducing pollution problems caused by manual operation.

[0003] However, in practical applications, static electricity is easily generated during the conveying process of materials in vacuum feeders due to friction and collision between the materials and the inner wall of the feeder, as well as between the materials themselves. When the static charge accumulates to a certain level, it will cause a series of problems: on the one hand, the static charge will cause the materials to adhere to the inner wall of the feeder, which will not only reduce the material conveying efficiency, but also result in material residue. This can easily lead to cross-contamination when changing materials later, which will seriously affect product quality, especially in the pharmaceutical and food industries.

[0004] On the other hand, in the production scenarios of flammable and explosive materials or precision components in the electronics industry, the accumulated static charge may cause electrostatic discharge, posing a safety hazard of fire, explosion or damage to precision components.

[0005] Therefore, there is an urgent need to design a vacuum feeder that can achieve anti-static function from multiple dimensions and has a stable and reliable anti-static effect, so as to solve the shortcomings of existing technologies. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes an anti-static vacuum feeding machine.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an anti-static vacuum feeder, comprising:

[0008] Feeder;

[0009] A vacuum pump is fixedly mounted on the feeder by a bracket. The vacuum pump is connected to the inside of the feeder through a connecting pipe to create a negative pressure environment inside the feeder, so that the material is adsorbed into the feeder by the negative pressure.

[0010] The feed pipe is located on one side of the feeder and is connected to the internal cavity of the feeder for material entry;

[0011] The discharge assembly is located at the bottom of the feeder and is connected to the internal cavity of the feeder for discharging materials.

[0012] An antistatic coating is provided on the inner wall of the feeder;

[0013] A grounding component is installed on the housing of the feeder to ground the feeder;

[0014] An ion wind generating component is disposed inside the feed pipe and is used to deliver ion wind into the feed pipe to neutralize the static charge carried by the material.

[0015] Preferably, the antistatic coating is a polyimide-based antistatic coating, and conductive particles are uniformly dispersed inside the antistatic coating. The conductive particles are graphene or carbon nanotubes. Graphene and carbon nanotubes have excellent conductivity, which can effectively reduce the surface resistance of the coating, making it difficult for static charge to accumulate on the inner wall of the feeder body, and preventing materials from being adsorbed on the wall surface due to static electricity.

[0016] Preferably, the grounding assembly includes a grounding wire, a grounding clamp, and a grounding resistance detection module. One end of the grounding wire is fixedly connected to the outer casing of the feeding machine, and the other end is connected to the grounding clamp. The grounding clamp is used to connect to an external grounding electrode. The grounding resistance detection module is connected in series with the grounding wire to detect the resistance value of the grounding loop in real time. One end of the grounding wire is fixedly connected to the main casing of the feeding machine by bolts, and the connection part is galvanized to prevent oxidation and rust from affecting conductivity. The other end is connected to the grounding clamp, which is made of copper alloy and has strong clamping force, allowing it to be firmly clamped to the external grounding electrode and ensuring the stability of the grounding loop. The grounding resistance detection module integrates a resistance detection chip, which can detect the resistance value of the grounding loop in real time. Under normal operating conditions, when the detected resistance value is greater than a preset threshold, the grounding resistance detection module can send a signal to the controller to remind the staff to check the grounding loop in time and avoid static electricity accumulation due to grounding failure.

[0017] Preferably, the ion wind generating assembly includes an ion generator, an air guide duct, and several air outlet nozzles. The ion generator is fixed to the outside of the feeder, and its ion output end is connected to one end of the air guide duct. The ion generator is a high-frequency, high-voltage ion generator, which can generate a large number of positive and negative ions. It is fixed to the outside of the feeder to avoid damage from material impact. The air guide duct is made of corrosion-resistant stainless steel, and the other end of the air guide duct extends into the inside of the feed pipe. Several air outlet nozzles are provided at the end of the air guide duct inside the feed pipe. The air outlets of the air outlet nozzles face the material conveying direction of the feed assembly, ensuring that the ion wind can evenly cover the material conveying path inside the feed pipe. When the material flows through the feed assembly, the ion wind can quickly neutralize the static charge carried by the material, preventing the material from being attracted to each other or adsorbed onto the wall surface due to static electricity after entering the feeder.

[0018] Preferably, the device also includes a material humidity detection unit, which is located at the inlet of the feed pipe. The material humidity detection unit is a humidity sensor used to detect the real-time humidity value of the material to be fed. The humidity sensor is a capacitive humidity sensor, characterized by high detection accuracy and fast response speed, and can detect the humidity value of the material to be fed in real time. The humidity of different materials is closely related to the amount of static electricity generated; the lower the humidity, the easier it is for the material to generate static electricity. When the material humidity value is lower than a preset lower humidity limit, the controller can control the ion wind generating component to increase the ion wind output intensity and increase the ion concentration, ensuring that static charge can still be effectively neutralized even when the material is dry and prone to static electricity generation.

[0019] Preferably, the feeder is further equipped with a negative pressure regulating component, which includes a pressure sensor and an electric regulating valve. The pressure sensor is fixed on the inner wall of the feeder and is used to detect the real-time negative pressure value inside the feeder. The electric regulating valve is installed on the connecting pipe. Excessive negative pressure can easily lead to increased friction between the material and the inner wall, increasing the amount of static electricity generated. Insufficient negative pressure will affect the material conveying efficiency. The opening degree of the electric regulating valve can be used to change the amount of air pumped by the vacuum pump to the feeder, ensuring the material conveying efficiency while avoiding the aggravation of static electricity generation due to excessive negative pressure.

[0020] Preferably, the discharge assembly includes a discharge pipe and an electrically controlled valve disposed on the discharge pipe.

[0021] Preferably, the feeder is also equipped with an infrared liquid level sensor, which is fixed on the inner wall of the feeder and is used to detect the accumulation height of the material inside the feeder. When the material accumulation height reaches the preset height, the infrared liquid level sensor transmits the signal to the controller, which controls the vacuum pump to stop working and controls the electric control valve to open, so as to realize the quantitative discharge of the material, avoid excessive accumulation of material inside, which would lead to increased friction and further reduce the generation of static electricity.

[0022] Preferably, a controller is fixedly connected to the outside of the feeding machine, and the vacuum pump, grounding resistance detection module, ion generator, humidity sensor, pressure sensor, electric regulating valve, electric control valve and infrared liquid level sensor are all electrically connected to the controller.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. This utility model employs a multi-dimensional anti-static system consisting of an anti-static coating, a grounding component, and an ion wind generator. This system works synergistically to prevent charge accumulation, guide away existing charges, and neutralize the charge carried by materials. The anti-static effect is more comprehensive and stable, effectively solving problems such as material adsorption and electrostatic discharge, and ensuring production safety and material conveying efficiency.

[0025] 2. This utility model, through the material humidity detection unit and negative pressure adjustment component, can dynamically adjust the ion wind output intensity and internal negative pressure according to the actual working conditions such as material humidity and internal negative pressure of the feeder, so that the anti-static measures can adapt to the needs of different materials and different working conditions, thereby improving the applicability and reliability of the equipment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an anti-static vacuum feeder according to the present invention;

[0027] Figure 2 This is a cross-sectional view of the feeder of an anti-static vacuum feeder according to the present invention;

[0028] Figure 3 This is a cross-sectional view of the feed pipe of an anti-static vacuum feeder according to the present invention;

[0029] Figure 4 This is a schematic diagram of the air outlet nozzle structure of an antistatic vacuum feeder according to the present invention;

[0030] Figure 5 This is a schematic diagram of the grounding component structure of an anti-static vacuum feeder according to the present invention.

[0031] In the diagram: 1. Feeder; 2. Vacuum pump; 21. Connecting pipe; 3. Feed pipe; 4. Discharge assembly; 5. Antistatic coating; 6. Grounding assembly; 7. Ion wind generating assembly; 61. Grounding wire; 62. Grounding clamp; 63. Grounding resistance detection module; 71. Ion generator; 72. Air duct; 73. Air outlet nozzle; 31. Humidity sensor; 11. Pressure sensor; 22. Electric regulating valve; 12. Infrared liquid level sensor; 8. Controller. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] The embodiments of this utility model will be described below based on its overall structure.

[0034] Please see Figure 1An antistatic vacuum feeder includes a feeder 1, a vacuum pump 2, a feed pipe 3, a discharge assembly 4, an antistatic coating 5, a grounding assembly 6, and an ion wind generating assembly 7. The vacuum pump 2 is fixedly mounted on the feeder 1 by a bracket and is connected to the inside of the feeder 1 through a connecting pipe 21. The feed pipe 3 is located on one side of the feeder 1 and is connected to the internal cavity of the feeder 1 for material entry. The discharge assembly 4 is located at the bottom of the feeder 1 and is connected to the internal cavity of the feeder 1 for material discharge. The antistatic coating 5 is applied to the inner wall of the feeder 1. The grounding assembly 6 is located on the outer shell of the feeder 1 for grounding the feeder 1. The ion wind generating assembly 7 is located inside the feed pipe 3 and is used to deliver ion wind into the feed pipe 3 to neutralize the static charge carried by the material.

[0035] To further explain, the feeder 1 forms the main frame of the equipment, creating a sealed cavity inside to provide space for the temporary storage and conveying of materials. The vacuum pump 2 extracts air from the feeder 1, creating a negative pressure environment within the cavity. This negative pressure difference draws external materials into the feeder 1 through the feed pipe 3, serving as the power source for automated material conveying. The feed pipe 3 forms the channel for materials to enter the feeder 1, ensuring a stable and continuous flow of materials into the negative pressure cavity. The discharge assembly 4 discharges the temporarily stored materials from the feeder 1, acting as the final actuator in the material conveying process. The antistatic coating 5 reduces the surface resistance of the inner wall, minimizing the accumulation of static charge generated during friction between the material and the inner wall, thus suppressing static electricity at its source and preventing materials from adhering to the inner wall of the feeder 1 due to static electricity. The grounding assembly 6 promptly conducts any small amount of static charge generated by friction on the outer casing and inner wall of the feeder 1 to the ground, preventing charge accumulation on the feeder 1 and eliminating the risk of electrostatic discharge. The ion wind generator 7 can deliver airflow containing positive and negative ions to the material conveying path. When the material flows through the feed pipe 3, the ion wind can quickly neutralize the static charge carried by the material itself, preventing the material from being attracted to each other or adsorbed on the inner wall due to static electricity after entering the feeder 1.

[0036] Please see Figure 2 The antistatic coating 5 is a polyimide-based antistatic coating, and conductive particles are uniformly dispersed inside the antistatic coating 5. The conductive particles are graphene or carbon nanotubes.

[0037] To further explain, the antistatic coating 5 uses a polyimide-based material, which has excellent high-temperature resistance and corrosion resistance, making it suitable for harsh production environments in industries such as chemical and pharmaceutical manufacturing, and preventing the coating from peeling off or failing during long-term use. The coating contains uniformly dispersed graphene or carbon nanotube conductive particles. Both types of conductive particles have extremely high conductivity, significantly reducing the surface resistance of the coating. This ensures that even with frequent friction between the material and the inner wall, the generated static charge can be quickly conducted through the conductive coating, rather than accumulating on the surface.

[0038] Please see Figure 1and Figure 5 The grounding component 6 includes a grounding wire 61, a grounding clamp 62, and a grounding resistance detection module 63. One end of the grounding wire 61 is fixedly connected to the outer shell of the feeder 1 and the other end is connected to the grounding clamp 62. The grounding clamp 62 is used to connect to an external grounding electrode. The grounding resistance detection module 63 is connected in series in the grounding wire 61 and is used to detect the resistance value of the grounding circuit in real time.

[0039] To further explain, one end of the grounding wire 61 is fixedly connected to the outer casing of the feeding machine 1 via galvanized bolts. The galvanizing treatment prevents oxidation and rust at the connection point and ensures conductivity. The other end is connected to the grounding clamp 62, which is the conductive carrier for conducting static charge from the equipment to the grounding electrode. The grounding clamp 62 is made of copper alloy and has strong clamping force, which can firmly hold it to the external grounding electrode, such as a grounding stake or grounding grid, ensuring that the grounding loop is always conductive and preventing grounding failure due to loose connection. The grounding resistance detection module 63 can collect the resistance value of the grounding loop in real time. During normal operation, if the detected resistance value is greater than the preset threshold, the module will immediately send a signal to the controller 8 to remind the staff to check the connection status of the grounding clamp 62 or whether the grounding electrode is damaged, to prevent the risk of static electricity caused by grounding failure.

[0040] Please see Figure 1 , Figure 3 and Figure 4 The ion wind generating assembly 7 includes an ion generator 71, an air guide duct 72, and several air outlet nozzles 73. The ion generator 71 is fixed on the outside of the feeder 1, and its ion output end is connected to one end of the air guide duct 72. The other end of the air guide duct 72 extends into the inside of the feed pipe 3. Several air outlet nozzles 73 are provided at one end of the air guide duct 72 located inside the feed pipe 3. The air outlets of the air outlet nozzles 73 face the material conveying direction of the feeding assembly.

[0041] To further explain, the ion generator 71 is a high-frequency, high-voltage ion generator, capable of stably producing a large number of positive and negative ions, serving as the source of the ion wind. The air duct 72 is made of corrosion-resistant stainless steel, with one end connected to the ion output end of the ion generator 71 and the other end extending into the feed pipe 3, used to transport the ions generated by the ion generator 71 to the material channel. The exhaust nozzle 73 ensures that the ion wind forms a full-coverage airflow, guaranteeing that all materials fully contact the ion wind and quickly neutralize their own static charge.

[0042] Please see Figure 3 It also includes a material humidity detection unit, which is set at the inlet of the feed pipe 3. The material humidity detection unit is a humidity sensor 31, which is used to detect the real-time humidity value of the material to be fed.

[0043] To further explain, the humidity sensor 31 is a capacitive humidity sensor, which features high detection accuracy and fast response time, and can collect the humidity value of the material to be fed in real time. Since the humidity of the material is negatively correlated with the amount of static electricity generated, the lower the humidity, the easier it is for the material to generate static electricity. When the humidity sensor 31 detects that the humidity of the material is lower than the preset lower limit, it will transmit a signal to the controller 8. The controller 8 will then control the ion generator 71 to increase the output power and increase the ion concentration of the ion wind, so as to ensure that the static charge can still be effectively neutralized even when the material is dry and prone to static electricity generation.

[0044] Please see Figure 2 The feeder 1 is also equipped with a negative pressure regulating component, which includes a pressure sensor 11 and an electric regulating valve 22. The pressure sensor 11 is fixed on the inner wall of the feeder 1 and is used to detect the real-time negative pressure value inside the feeder 1. The electric regulating valve 22 is installed on the connecting pipe 21.

[0045] To further explain, the negative pressure regulating component balances material conveying efficiency with static electricity generation, preventing the problem from worsening due to improper negative pressure. Pressure sensor 11 detects the internal negative pressure value of the feeder 1 in real time and transmits the data to controller 8. Excessive negative pressure can cause materials to impact the inner wall at high speed, increasing friction and static electricity generation. When pressure sensor 11 detects excessive negative pressure, controller 8 controls the electric regulating valve 22 to increase its opening, reducing the amount of air pumped from the feeder 1 by vacuum pump 2 and lowering the internal negative pressure. If the negative pressure value is too low, affecting conveying efficiency, the valve opening is reduced to increase the negative pressure. Through dynamic adjustment, the negative pressure is maintained within a preset optimal range, ensuring conveying efficiency while minimizing static electricity generation.

[0046] Please see Figure 1 The discharge assembly 4 includes a discharge pipe and an electrically controlled valve installed on the discharge pipe.

[0047] To further explain, the discharge assembly 4 consists of a discharge pipe and an electrically controlled valve, which is electrically connected to the controller 8. When material needs to be discharged, the controller 8 can control the electrically controlled valve to open, and the material is discharged through the discharge pipe under gravity. After discharge, the electrically controlled valve closes, ensuring that a sealed environment is re-established inside the feeder 1, facilitating the next negative pressure feeding.

[0048] Please see Figure 2 The feeder 1 is also equipped with an infrared liquid level sensor 12, which is fixed on the inner wall of the feeder 1 and is used to detect the stacking height of the material inside the feeder 1.

[0049] To further explain, the infrared liquid level sensor 12 employs a non-contact detection method, enabling it to penetrate dusty environments and accurately detect the accumulation height of internal materials. When the material accumulation height reaches a preset value, the infrared liquid level sensor 12 sends a signal to the controller 8, which then stops the vacuum pump 2, halts feeding, and simultaneously opens the electrically controlled valve of the discharge assembly 4 to discharge the material. This prevents excessive material accumulation inside, which could lead to increased inter-particle friction, further reducing static electricity generation, and simultaneously achieving automated cycles of quantitative feeding and quantitative discharge.

[0050] Please see Figure 1 The controller 8 is fixedly connected to the outside of the feeding machine 1. The vacuum pump 2, the grounding resistance detection module 63, the ion generator 71, the humidity sensor 31, the pressure sensor 11, the electric regulating valve 22, the electric control valve and the infrared liquid level sensor 12 are all electrically connected to the controller 8.

[0051] To further explain, the controller 8 is electrically connected to the vacuum pump 2, the grounding resistance detection module 63, the ion generator 71, the humidity sensor 31, the pressure sensor 11, the electric regulating valve 22, the electric control valve, and the infrared liquid level sensor 12 via wires. It can receive the detection data of each component in real time and output control commands according to the preset program.

[0052] It should also be noted that the controller 8 mentioned above uses an STM32 microcontroller. The input and output pins of the microcontroller are connected to the vacuum pump 2, the grounding resistance detection module 63, the ion generator 71, the humidity sensor 31, the pressure sensor 11, the electric regulating valve 22, the electric control valve, and the infrared liquid level sensor 12 as described above. This can be achieved by programming the microcontroller. The circuit and program used are common technologies in the field of microcontrollers. Those skilled in the art can easily derive the specific circuit based on the above control relationship description. Therefore, the specific circuit will not be described in detail in this article.

[0053] Working Principle: During use, the operator firmly clamps the grounding clamp 62 of the grounding component 6 onto the external grounding electrode, connects the input end of the feed pipe 3 to the external material storage device, and starts the vacuum pump 2 via the controller 8. The vacuum pump 2 extracts air from the inside of the feeder 1 through the connecting pipe 21, creating a negative pressure inside the cavity. Under the action of the negative pressure difference, the external material is conveyed through the feed pipe 3. The ion generator 71 of the ion wind generating component 7 is started, and the generated positive and negative ions are conveyed to the air outlet nozzle 73 through the air guide pipe 72. The nozzle sprays ion wind in the direction of material conveying, neutralizing the static charge carried by the material. The humidity sensor 31 at the feed inlet of the feed pipe 3 detects the humidity of the material in real time. If the humidity is normal, the ion generator 71 maintains normal power. If the humidity is lower than the preset lower limit, the controller 8 controls the ion generator 71 to increase the power and increase the ion concentration. The antistatic coating 5 on the inner wall of the feeder 1 reduces the frictional resistance between the material and the inner wall, reducing the generation of new static charge. At the same time, the grounding component 6 conducts the small amount of static charge generated by the equipment body to the ground through the grounding wire 61. Pressure sensor 11 monitors the negative pressure inside the feeder 1 in real time. If the negative pressure is too high, controller 8 controls electric regulating valve 22 to increase its opening and reduce the air extraction volume. If the negative pressure is too low, it decreases the valve opening and increases the air extraction volume, ensuring that the negative pressure is always maintained within the optimal range. After the material enters the feeder 1, it gradually accumulates. Infrared liquid level sensor 12 detects the accumulation height in real time. When the height reaches the preset upper limit, infrared liquid level sensor 12 sends a signal to controller 8. After receiving the signal, controller 8 immediately stops vacuum pump 2 and simultaneously opens the electric control valve of discharge assembly 4, allowing the material in feeder 1 to be discharged through the discharge pipe. When infrared liquid level sensor 12 detects that the material accumulation height has dropped to the preset lower limit, controller 8 closes the electric control valve and restarts vacuum pump 2 to enter the next feeding cycle.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An anti-static vacuum feeder, characterized in that, include: Feeder (1); Vacuum pump (2), the vacuum pump (2) is fixedly mounted on the feeder (1) by a bracket, and the vacuum pump (2) is connected to the inside of the feeder (1) by a connecting pipe (21); Feed pipe (3), the feed pipe (3) is located on one side of the feeder (1) and is connected to the internal cavity of the feeder (1) for material entry; The discharge assembly (4) is located at the bottom of the feeder (1) and is connected to the internal cavity of the feeder (1) for discharging materials. An antistatic coating (5) is provided on the inner wall of the feeder (1); Grounding component (6), which is disposed on the housing of the feeder (1) for grounding the feeder (1); Ion wind generating component (7), which is installed inside the feed pipe (3) and is used to deliver ion wind into the feed pipe (3) to neutralize the static charge carried by the material.

2. The antistatic vacuum feeder according to claim 1, characterized in that: The antistatic coating (5) is a polyimide-based antistatic coating, and conductive particles are uniformly dispersed inside the antistatic coating (5). The conductive particles are graphene or carbon nanotubes.

3. The antistatic vacuum feeder according to claim 1, characterized in that: The grounding assembly (6) includes a grounding wire (61), a grounding clamp (62), and a grounding resistance detection module (63). One end of the grounding wire is fixedly connected to the outer shell of the feeding machine (1), and the other end is connected to the grounding clamp (62). The grounding clamp (62) is used to connect to an external grounding electrode. The grounding resistance detection module (63) is connected in series in the grounding wire (61) and is used to detect the resistance value of the grounding circuit in real time.

4. The antistatic vacuum feeder according to claim 3, characterized in that: The ion wind generating assembly (7) includes an ion generator (71), an air duct (72), and several air outlet nozzles (73). The ion generator (71) is fixed on the outside of the feeder (1), and its ion output end is connected to one end of the air duct (72). The other end of the air duct (72) extends into the inside of the feed pipe (3). Several air outlet nozzles (73) are provided at one end of the air duct (72) inside the feed pipe (3). The air outlets of the air outlet nozzles (73) face the material conveying direction of the feeding assembly.

5. The antistatic vacuum feeder according to claim 4, characterized in that: It also includes a material humidity detection unit, which is set at the inlet of the feed pipe (3). The material humidity detection unit is a humidity sensor (31), which is used to detect the real-time humidity value of the material to be fed.

6. The antistatic vacuum feeder according to claim 5, characterized in that: The feeder (1) is also equipped with a negative pressure regulating component, which includes a pressure sensor (11) and an electric regulating valve (22). The pressure sensor (11) is fixed on the inner wall of the feeder (1) and is used to detect the real-time negative pressure value inside the feeder (1). The electric regulating valve (22) is installed on the connecting pipe (21).

7. The antistatic vacuum feeder according to claim 6, characterized in that: The discharge assembly (4) includes a discharge pipe and an electrically controlled valve installed on the discharge pipe.

8. The antistatic vacuum feeder according to claim 7, characterized in that: The feeder (1) is also equipped with an infrared liquid level sensor (12), which is fixed on the inner wall of the feeder (1) and is used to detect the stacking height of the material inside the feeder (1).

9. The antistatic vacuum feeder according to claim 1, characterized in that: The feeder (1) is fixedly connected to a controller (8). The vacuum pump (2), grounding resistance detection module (63), ion generator (71), humidity sensor (31), pressure sensor (11), electric regulating valve (22), electric control valve and infrared liquid level sensor (12) are all electrically connected to the controller (8).

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