Automatic nitrogen filling device

Abstract

This utility model provides an automatic nitrogen filling device, relating to the field of nitrogen technology. It includes a weighing device, with a material injection device on one side and a nitrogen filling device on the other. A discharge hopper is located at the top of the weighing device, containing a discharge bag. A transmission source is located between the bottom of the weighing device and the bottom back of the nitrogen filling device. By using the weighing and nitrogen filling devices, precise, data-driven adjustments are achieved based on real-time changes in the weight of the material in the discharge hopper. This ensures rapid response, high precision, and high stability in the position control of the filling pipe, allowing it to smoothly follow the rise of the liquid level and ensure that nitrogen is always injected close to the liquid surface. The device achieves fully automated operation from the descent of the filling pipe, nitrogen filling as the liquid level rises, timed delay, to automatic reset, significantly reducing manual intervention, improving operational consistency and reliability, and realizing high-precision automated nitrogen filling and liquid level synchronization control.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen technology, and in particular to an automatic nitrogen filling device. Background Technology

[0002] An automatic nitrogen filling device disclosed in Chinese Patent No. CN219995045U includes a nitrogen filling pile, a nitrogen filling device body, and a gas pipe. The nitrogen filling device body includes a cylinder, a push rod, a filling nozzle, and a flow detection switch. The cylinder includes a cylinder body and a piston rod. One end of the push rod is connected to the piston rod, and the other end is connected to the filling nozzle. The filling nozzle includes a top cover, a housing, a spring, and a steel ball, with the steel ball and spring located inside the housing. The top cover has a through hole for the push rod to extend and retract. A hollow cylinder is provided around the lower surface of the through hole, and an arc-shaped notch is provided at the bottom of the hollow cylinder to fit the steel ball. The flow detection switch is located on the gas pipe. When the flow detection switch detects a set value, the piston rod retracts, the spring deforms and pushes the steel ball to close with the arc-shaped notch, stopping the gas supply. This structure is novel and reasonable, highly efficient, reduces labor costs, and is highly practical.

[0003] The aforementioned comparative documents and existing technologies have the following technical problems: Existing PU adhesive products are prone to peeling after contact with oxygen, so nitrogen needs to be filled in to remove oxygen in order to ensure product quality. However, traditional manual nitrogen filling or simple fixed pipeline nitrogen filling methods have problems such as uneven filling, nitrogen waste, cumbersome operation, and untimely protection during dynamic material discharge. It is difficult to completely avoid the product's contact with air, especially during the filling process when the liquid level is constantly changing. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic nitrogen filling device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automatic nitrogen filling device, including a weighing device, a material injection device on one side of the weighing device, a nitrogen filling device on the other side of the weighing device, a discharge barrel on the top of the weighing device, a discharge bag inside the discharge barrel, and a transmission source between one side of the bottom of the weighing device and the back of the bottom of the nitrogen filling device.

[0006] Preferably, the weighing device includes a weighing plate, a transmission base is provided on the back of the weighing plate, a weighing rod is provided on the top of the transmission base, a connecting frame is provided on the top of the weighing rod, and fixed shafts are provided on both sides of the connecting frame.

[0007] Preferably, the weighing rod has a connection hole at the top, a data cable is provided at the top of the connection hole, a display is provided on the inner side of the connection frame, and the display is connected to the connection frame by a fixed shaft.

[0008] Preferably, the injection device includes a material cylinder, a discharge pipe is provided on one side of the material cylinder, a manual valve is provided on the front of the discharge pipe, a support rod is provided on one side of the top of the material cylinder, a discharge cylinder is provided at the bottom of the support rod, a discharge port is provided at the bottom of the discharge cylinder, one side of the discharge port is connected to the discharge pipe, and a flow-retardant sleeve is provided on the outside of the discharge port.

[0009] Preferably, the nitrogen filling device includes a processor, a control button on the front of the processor, a foot switch at the bottom of the front of the processor, a nitrogen cylinder on the top of the processor, an outlet pipe on one side of the nitrogen cylinder, sealing rings at both ends of the outlet pipe, a pressure gauge on the front of the outlet pipe, a connector on the top of the nitrogen cylinder, a servo motor on the top of the connector, a connecting rod on one side of the servo motor, a push-pull rod at the bottom of the connecting rod, an inflation pipe at the bottom of the push-pull rod, and a small air blowing hole on one side of the bottom end of the inflation pipe.

[0010] Preferably, the foot switch is electrically connected to the processor and the servo motor is electrically connected to the push-pull rod. One side of the push-pull rod is connected to the air outlet pipe. The push-pull rod is equipped with a push-pull device inside. The push-pull device is connected to the air inlet pipe. The air outlet pipe passes through the inside of the push-pull rod to the bottom of the air inlet pipe. The air inlet pipe is located on one side of the inner wall of the discharge barrel, and the air blowing hole faces the inner wall of the discharge barrel. The processor is equipped with a timer inside.

[0011] Preferably, the transmission source includes a transmission line, with an output port on one side and an input port on the other side. The output port is located on the bottom side of the transmission base, and the input port is located on the bottom back of the processor.

[0012] Beneficial effects

[0013] This invention employs a weighing device and a nitrogen filling device. The weighing device transmits its data to the processor of the nitrogen filling device via a transmission line, enabling precise, data-driven adjustment of the nitrogen filling pipe height based on real-time changes in the weight of the material in the discharge hopper. The nitrogen filling device uses a servo motor to drive the connecting rod and push-pull rod, thereby controlling the raising and lowering of the filling pipe. The application of the servo motor ensures rapid response, high precision, and high stability in the position control of the filling pipe, allowing it to smoothly follow the rise of the liquid level and ensuring that nitrogen is always injected close to the liquid level. The process is started via a foot switch, and the processor and internal timer control the entire workflow, achieving fully automated operation from the descent of the filling pipe, nitrogen filling as the liquid level rises, timed delay, to automatic reset. This significantly reduces manual intervention and improves the consistency and reliability of operation. To start working: Depress the foot pedal, the nitrogen filling device starts working, the filling pipe descends into the discharge bag, and then the hand valve is opened to discharge the material. As the weight of the material increases, the nitrogen filling device rises accordingly. After the material is discharged, it pauses for 5 seconds, then exits the receiving tank and returns to its initial position, achieving high-precision automated nitrogen filling and liquid level synchronization control.

[0014] This invention employs an air-filling orifice and a filling device. The air-filling pipe is specially designed to be located on one side of the inner wall of the discharge barrel, with the air-filling orifice facing the inner wall of the discharge barrel. This arrangement allows nitrogen to flow gently along the barrel wall and cover the liquid surface, effectively avoiding direct impact on the PU material and preventing product splashing or being blown away. It also minimizes the mixing of oxygen during operation, thereby effectively preventing the PU product surface from peeling and ensuring product quality. The discharge port of the filling device is equipped with a flow-slowing sleeve. This detail helps to slow down the flow rate of the PU material, allowing it to be injected into the discharge bag more smoothly and reducing bubbles or turbulence that may be generated due to rapid flow. This, combined with nitrogen filling protection, further ensures product quality.

[0015] This invention employs weighing and nitrogen filling equipment. The device integrates functions such as weighing system, foot pedal start, automatic lifting and lowering of nitrogen filling tube, timed filling, and automatic reset, forming a complete automated operation process. It is convenient and efficient to operate. The operator only needs to step on the foot pedal, and the equipment can automatically complete a series of complex nitrogen filling protection actions, including precise positioning of the filling tube, follow-up and delay protection. This simplifies operation, improves production efficiency, and the automated control ensures the consistency and reliability of the nitrogen filling process for each operation, reducing quality fluctuations caused by human operation differences. It pauses after the material is discharged to ensure that the top space can be fully replaced before the product is packaged. Attached Figure Description

[0016] Figure 1 This is an isometric view of the present invention;

[0017] Figure 2 This is a front view of the present invention;

[0018] Figure 3 This is a rear view of the present invention;

[0019] Figure 4 This is the right view of the present invention.

[0020] Legend:

[0021] 1. Weighing equipment; 101. Weighing plate; 102. Transmission base; 103. Weighing rod; 104. Connecting frame; 105. Fixed shaft; 106. Data cable; 107. Display; 2. Injection equipment; 201. Material cylinder; 202. Discharge pipe; 203. Manual valve; 204. Support rod; 205. Discharge cylinder; 206. Discharge pipe; 207. Flow buffer sleeve; 3. Nitrogen filling equipment; 301. Processor; 30 2. Control button; 303. Foot switch; 304. Nitrogen cylinder; 305. Sealing ring; 306. Air outlet pipe; 307. Pressure gauge; 308. Connector; 309. Servo motor; 3010. Connecting rod; 3011. Push-pull rod; 3012. Inflation pipe; 3013. Air blowing hole; 4. Discharge bucket; 5. Discharge bag; 6. Transmission source; 601. Transmission line; 602. Output port; 603. Input port. Detailed Implementation

[0022] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0023] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0025] Reference Figure 1-4This utility model provides an automatic nitrogen filling device, including a weighing device 1. The weighing device 1 includes a weighing plate 101, a transmission base 102 on the back of the weighing plate 101, a weighing rod 103 on the top of the transmission base 102, a connecting frame 104 on the top of the weighing rod 103, fixed shafts 105 on both sides of the connecting frame 104, a connecting hole on the top of the weighing rod 103, a data cable 106 on the top of the connecting hole, a display 107 on the inner side of the connecting frame 104, and the display 107 is connected to the connecting frame 104 via the fixed shafts 105. A material injection device 2 is provided on one side of the weighing device 1. The material injection device 2 includes a material cylinder 201, a discharge pipe 202 on one side of the material cylinder 201, and a manual discharge pipe 202 on the front of the discharge pipe 202. Valve 203, a support rod 204 is provided on one side of the top of the material cylinder 201, a discharge cylinder 205 is provided at the bottom of the support rod 204, a discharge port 206 is provided at the bottom of the discharge cylinder 205, one side of the discharge port 206 is connected to the discharge pipe 202, and a flow-slowing sleeve 207 is provided on the outside of the discharge port 206. A nitrogen filling device 3 is provided on the other side of the weighing device 1. The nitrogen filling device 3 includes a processor 301, a control button 302 is provided on the front of the processor 301, a foot switch 303 is provided at the bottom of the front of the processor 301, a nitrogen cylinder 304 is provided on the top of the processor 301, an outlet pipe 306 is provided on one side of the nitrogen cylinder 304, sealing rings 305 are provided at both ends of the outlet pipe 306, a pressure gauge 307 is provided on the front of the outlet pipe 306, and the top of the nitrogen cylinder 304... A connector 308 is provided, with a servo motor 309 at its top. A connecting rod 3010 is located on one side of the servo motor 309. A push-pull rod 3011 is located at the bottom of the connecting rod 3010. An inflation tube 3012 is located at the bottom of the push-pull rod 3011. A small air hole 3013 is located on one side of the bottom end of the inflation tube 3012. A foot switch 303 is electrically connected to the processor 301, and the servo motor 309 is electrically connected to the push-pull rod 3011. One side of the push-pull rod 3011 is connected to an air outlet pipe 306. A push-pull device is located inside the push-pull rod 3011 and is connected to the inflation tube 3012. The air outlet pipe 306 passes through the interior of the push-pull rod 3011 to the bottom end of the inflation tube 3012. The inflation tube 3012 is located at the discharge hopper 4. The processor 301 has a timer inside, with the air blowing hole 3013 facing the inner wall of the discharge barrel 4. The top of the weighing device 1 has a discharge barrel 4, and the discharge barrel 4 has a discharge bag 5 inside. A transmission source 6 is located between the bottom of the weighing device 1 and the bottom back of the nitrogen filling device 3. The transmission source 6 includes a transmission line 601, with an output port 602 on one side and an input port 603 on the other side. The output port 602 is located on the bottom side of the transmission base 102, and the input port 603 is located on the bottom back of the processor 301. Using the weighing device 1 and the nitrogen filling device 3, the weighing device 1 transmits its data to the processor 301 of the nitrogen filling device 3 via the transmission line 601 of the transmission source 6.This allows for precise, data-driven adjustment of the nitrogen filling pipe height based on real-time changes in the weight of the material in the discharge hopper 4. The nitrogen filling device 3 uses a servo motor 309 to drive the connecting rod 3010 and the push-pull rod 3011, thereby controlling the raising and lowering of the filling pipe 3012. The application of the servo motor 309 ensures rapid response, high precision, and high stability in the position control of the filling pipe 3012, enabling it to smoothly follow the liquid level as it rises, ensuring that nitrogen is always injected close to the liquid surface. The process is started via a foot switch 303, and the processor 301 and its internal timer control the entire workflow, achieving… The fully automated operation, from the descent of the inflation pipe 3012, nitrogen filling as the liquid level rises, timed delay, to automatic reset, significantly reduces manual intervention and improves operational consistency and reliability. To begin operation: Press the foot switch 303, and the nitrogen filling device 3 starts working. The inflation pipe 3012 descends into the discharge bag 5, then the manual valve 203 is opened to discharge the material. As the weight of the material increases, the inflation pipe 3012 on the nitrogen filling device 3 rises accordingly. After discharge, the process pauses, then the device exits the receiving hopper and returns to its initial position, achieving high-precision automated nitrogen filling and liquid level synchronization control. Specific Implementation Example 2:

[0027] Reference Figure 1 The inflation tube 3012 and the discharge tube 202 of the filling device 2 are designed as an integrated filling head assembly. Through standardized quick connection and release mechanisms, such as buckles, pneumatic clamps, or electromagnetic locking devices, it is installed on the push-pull rod 3011 driven by the servo motor 309 or the newly added XYZ three-axis motion platform. Inflation tube 3012 modules with different diameters, lengths, or nozzle styles and discharge tube 202 modules with different viscosities and discharge volumes are developed. For large-opening discharge bags 5, ring or multi-point array inflation tube 3012 modules can be designed to achieve more uniform and rapid nitrogen coverage. It can be quickly switched to adapt to different specifications of discharge bags 5, different types of PU glue, or different filling volume requirements, which greatly improves the equipment's adaptability to production diversity. The filling head assembly can be quickly disassembled for convenient offline cleaning, maintenance, or replacement, reducing equipment downtime.

[0028] In summary:

[0029] 1. By using weighing device 1 and nitrogen filling device 3, precise, data-driven adjustments are made based on the real-time changes in the weight of the material in the discharge bucket 4. This ensures rapid response, high precision, and high stability of the position control of the filling pipe 3012, allowing it to smoothly follow the rise of the liquid level and ensuring that nitrogen is always injected close to the liquid level. This achieves fully automated operation from the descent of the filling pipe 3012, nitrogen filling as the liquid level rises, timed delay, to automatic reset, significantly reducing manual intervention, improving the consistency and reliability of operation, and realizing high-precision automated nitrogen filling and liquid level synchronization control.

[0030] 2. By employing the air blowing hole 3013 and the injection device 2, the air filling pipe 3012 is specially designed to be located on one side of the inner wall of the discharge barrel 4, and the air blowing hole 3013 faces the inner wall of the discharge barrel 4. This layout allows nitrogen to flow gently along the barrel wall and cover the liquid surface, effectively avoiding direct impact on the PU material and preventing product splashing or being blown away. It also minimizes the mixing of oxygen during operation, thereby effectively preventing the PU product surface from peeling and ensuring product quality. The discharge port 206 of the injection device 2 is provided with a slow flow sleeve 207 on the outside. This detail helps to slow down the flow rate of the PU material, allowing it to be injected into the discharge bag 5 more smoothly, reducing the bubbles or turbulence that may be generated due to rapid flow. This, together with the nitrogen filling protection, further ensures product quality.

[0031] 3. By employing weighing device 1 and nitrogen filling device 3, the device integrates the weighing system, foot pedal start, automatic lifting and lowering of the nitrogen filling hose, timed filling, and automatic reset functions into a complete automated operation process. This process is convenient and efficient. The operator only needs to press the foot switch 303, and the equipment will automatically complete a series of complex nitrogen filling protection actions, including precise positioning, follow-up, and delay protection of the filling hose 3012. This simplifies operation, improves production efficiency, and the automated control ensures the consistency and reliability of the nitrogen filling process for each operation, reducing quality fluctuations caused by human error. The system pauses after discharging to ensure that the nitrogen filling process is completed before product packaging.

[0032] The top space can be fully replaced.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic nitrogen filling device, comprising a weighing device (1), characterized in that: The weighing device (1) is provided with a material injection device (2) on one side and a nitrogen filling device (3) on the other side. The weighing device (1) is provided with a discharge bucket (4) at the top and a discharge bag (5) inside the discharge bucket (4). A transmission source (6) is provided between the bottom side of the weighing device (1) and the bottom back of the nitrogen filling device (3).

2. The automatic nitrogen filling device according to claim 1, characterized in that: The weighing device (1) includes a weighing plate (101), a transmission base (102) is provided on the back of the weighing plate (101), a weighing rod (103) is provided on the top of the transmission base (102), a connecting frame (104) is provided on the top of the weighing rod (103), and fixed shafts (105) are provided on both sides of the connecting frame (104).

3. The automatic nitrogen filling device according to claim 2, characterized in that: The weighing rod (103) has a connection hole at the top, and a data cable (106) is provided at the top of the connection hole. The inner side of the connecting frame (104) is provided with a display (107), and the display (107) and the connecting frame (104) are connected by a fixed shaft (105).

4. The automatic nitrogen filling device according to claim 1, characterized in that: The material injection device (2) includes a material cylinder (201), a discharge pipe (202) is provided on one side of the material cylinder (201), a manual valve (203) is provided on the front of the discharge pipe (202), a support rod (204) is provided on one side of the top of the material cylinder (201), a discharge cylinder (205) is provided at the bottom of the support rod (204), a discharge port (206) is provided at the bottom of the discharge cylinder (205), one side of the discharge port (206) is connected to the discharge pipe (202), and a slow-flow sleeve (207) is provided on the outside of the discharge port (206).

5. An automatic nitrogen filling device according to claim 1, characterized in that: The nitrogen filling device (3) includes a processor (301), a control button (302) on the front of the processor (301), a foot switch (303) at the bottom of the front of the processor (301), a nitrogen cylinder (304) on the top of the processor (301), an outlet pipe (306) on one side of the nitrogen cylinder (304), sealing rings (305) at both ends of the outlet pipe (306), and a pressure gauge on the front of the outlet pipe (306). (307) The top of the nitrogen cylinder (304) is provided with a connector (308), the top of the connector (308) is provided with a servo motor (309), one side of the servo motor (309) is provided with a connecting rod (3010), the bottom of the port of the connecting rod (3010) is provided with a push-pull rod (3011), the bottom of the push-pull rod (3011) is provided with an inflation tube (3012), and one side of the bottom end of the inflation tube (3012) is provided with a small air blowing hole (3013).

6. An automatic nitrogen filling device according to claim 5, characterized in that: The foot switch (303) is electrically connected to the processor (301) and the servo motor (309) is electrically connected to the push-pull rod (3011). One side of the push-pull rod (3011) is connected to the air outlet pipe (306). The push-pull rod (3011) is equipped with a push-pull device inside. The push-pull device is connected to the air inlet pipe (3012). The air outlet pipe (306) passes through the inside of the push-pull rod (3011) to the bottom end of the air inlet pipe (3012). The air inlet pipe (3012) is located on one side of the inner wall of the discharge barrel (4), and the blowing hole (3013) faces the direction of the inner wall of the discharge barrel (4). The processor (301) is equipped with a timer inside.

7. An automatic nitrogen filling device according to claim 1, characterized in that: The transmission source (6) includes a transmission line (601), with an output port (602) on one side of the transmission line (601) and an input port (603) on the other side. The output port (602) is located on the bottom side of the transmission base (102), and the input port (603) is located on the bottom back of the processor (301).

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