A nozzle device for a vacuum nitrogen-filled powder type packaging machine

Abstract

This invention relates to a nozzle device for a vacuum nitrogen-filled powder packaging machine, comprising a nitrogen filling tube, a vacuum tube, and a nozzle structure. The nitrogen filling tube and the vacuum tube are respectively connected to the nitrogen filling channel and the vacuum channel within the nozzle structure. The nozzle structure includes a duckbill tube and a flat tube integrally connected vertically, several partitions disposed within the inner cavity of the flat tube, several nitrogen-filling flaps and a filter membrane disposed within each partition, a torsion spring mounted on the rotating shaft of the nitrogen-filling flaps, and a baffle for limiting the upward rotation of the nitrogen-filling flaps. The partition with the nitrogen-filling flaps is connected to the nitrogen filling channel, and the partition with the filter membrane is connected to the vacuum channel. By configuring multiple partitions inside the flat tube at the bottom of the nozzle, with rotatable nitrogen-filling flaps and fixed filter membranes respectively disposed within each partition, this invention ensures that no powder enters the nozzle during vacuuming and nitrogen filling operations, guaranteeing accurate packaging bag quantity and nozzle cleanliness.

Description

Technical Field

[0001] This invention belongs to the field of vacuum packaging, specifically relating to a nozzle device for a vacuum nitrogen-filled powder packaging machine. Background Technology

[0002] In existing technologies, some powdered foods require vacuuming and nitrogen filling of the packaging bag during packaging. Specifically, a three-way connector is used to connect the vacuum tube, nitrogen filling tube, and nozzle. However, this connector structure still has the following problems: (1) There is a gap between the packaging bag and the nozzle. When nitrogen is filled, the powder will be discharged from the gap to the outside of the packaging bag due to the impact of nitrogen, which will affect the normal filling amount of the product, pollute the environment, and the powder adhering to the bag opening will also affect the subsequent sealing. (2) When vacuuming, the powder is easily carried out. After the nitrogen is filled, the powder that floats due to the impact of nitrogen will enter the nozzle, causing a reduction in the packaging quantity and contamination of the nozzle. Summary of the Invention

[0003] The purpose of this invention is to provide a nozzle device for a vacuum nitrogen-filled powder packaging machine in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions: A nozzle device for a vacuum nitrogen-filled powder packaging machine includes a nitrogen filling tube, a vacuum extraction tube, and a nozzle structure. The nitrogen filling tube and the vacuum extraction tube are respectively connected to a nitrogen filling channel and a vacuum extraction channel within the nozzle structure. The nozzle structure includes a duckbill tube and a flat tube integrally connected at the top and bottom, several partitions set in the inner cavity of the flat tube, several nitrogen-filling flaps and filter membranes set in the partitions, a torsion spring installed on the rotating shaft of the nitrogen-filling flaps, and a baffle for limiting the upward flipping of the nitrogen-filling flaps; the partition with the nitrogen-filling flaps is connected to the nitrogen-filling channel, and the partition with the filter membranes is connected to the vacuum channel. When the nitrogen-filling hinge flips open under nitrogen filling pressure, it connects the nitrogen filling channel and the packaging bag. After nitrogen filling stops, the nitrogen-filling hinge resets under the drive of the torsion spring and is limited by the baffle to close the nitrogen filling channel and the packaging bag. The nitrogen-filling hinge also keeps the nitrogen filling channel closed during vacuuming.

[0005] As a further optimization of the present invention, the bottom opening of the duckbill tube is connected to the top opening of the flat tube, and the top opening is connected to the flange at the bottom of the nitrogen filling tube through a flange.

[0006] As a further optimization of the present invention, one end of the vacuum tube extends through the nitrogen filling tube and the flange to the inner cavity of the duckbill tube and communicates with the vacuum channel.

[0007] As a further optimization of the present invention, the vacuuming channel is a multi-port pipe structure, the nitrogen filling channel is a cavity between the multi-port pipe structure and the inner wall of the duckbill tube, multiple interfaces at the bottom of the multi-port pipe structure are fixedly connected to the partition for installing the filter membrane, and one interface at the top of the multi-port pipe structure is movably snapped into the vacuuming tube.

[0008] As a further optimization of the present invention, an air bladder is fixedly provided on the outer wall of the flat tube, and the air bladder is connected to an external air pump through an inflation tube, and an electromagnetic valve is provided on the inflation tube.

[0009] As a further optimization of the present invention, packaging bag support plates are provided on both sides of the top of the flat tube. The two packaging bag support plates are driven by a linear reciprocating drive mechanism to make linear reciprocating motions that move closer or further away from each other. The cross-sections of the two packaging bag support plates are set as mutually symmetrical U-shapes.

[0010] As a further optimization of the present invention, the linear reciprocating drive mechanism includes a screw with opposite threads on its two outer walls, a servo motor for driving the screw, two nuts threaded to the threads on the outer walls of the screw, and a shaped rod connecting the two nuts and two packaging bag support plates. The two ends of the screw are connected to the nitrogen filling pipe through bearings and brackets.

[0011] The beneficial effects of this invention are as follows: 1) By setting multiple partitions inside the flat tube at the bottom of the nozzle, and setting rotatable nitrogen-filling hinges and fixed filter membranes in each partition, the present invention can ensure that no powder enters the nozzle during vacuuming and nitrogen filling operations, thus ensuring accurate packaging of the packaging bag and cleanliness of the nozzle. 2) When the nozzle of this invention is vacuumed, the nitrogen-filling hinge blocks the nitrogen-filling channel and the packaging bag. Air is discharged through the filter membrane and the powder is filtered. When nitrogen is filled, the nitrogen-filling hinge opens and the nitrogen can carry the powder on the filter membrane back into the packaging bag, thus avoiding a large amount of powder adhering to the filter membrane and affecting the packaging quantity. 3) By setting an airbag on the outside of the flat tube, the present invention can seal the bag opening before operation, ensuring that there is no powder contamination at the bag opening, which facilitates subsequent bag sealing; 4) This invention provides two packaging bag support plates that can move closer or further apart from each other above the flat tube. When the packaging bag is placed outside the nozzle, it supports the packaging bag and frees up the hands. When used with the airbag, it can make the packaging bag flat and supported, which is convenient for vacuuming, nitrogen filling and flat sealing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the airbag of the present invention when it is not inflated.

[0013] Figure 2This is a schematic diagram of the overall structure of the airbag of the present invention when it is inflated.

[0014] Figure 3 This is a top view of the nozzle structure of the present invention.

[0015] Figure 4 This is a schematic diagram of the overall cross-sectional structure of the present invention.

[0016] Figure 5 This is the invention Figure 4 Schematic diagram of part A in the middle.

[0017] Figure 6 This is a top view of the linear reciprocating drive mechanism of the present invention.

[0018] In the diagram: 1. Nitrogen filling tube; 2. Vacuum tube; 3. Nozzle structure; 31. Duckbill tube; 32. Flat tube; 33. Partition; 34. Nitrogen filling hinge; 35. Filter membrane; 36. Torsion spring; 37. Baffle; 4. Nitrogen filling channel; 5. Vacuum channel; 6. Flange; 7. Airbag; 8. Packaging bag support plate; 9. Linear reciprocating drive mechanism; 91. Screw; 92. Servo motor; 93. Nut; 94. Irregular rod. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In the description of this invention, unless otherwise stated, "a plurality of" or "several" means two or more.

[0021] Example 1

[0022] like Figure 1-5 As shown, a nozzle device for a vacuum nitrogen-filled powder packaging machine includes a nitrogen filling pipe 1, a vacuum extraction pipe 2, and a nozzle structure 3. The nitrogen filling pipe 1 and the vacuum extraction pipe 2 are respectively connected to a nitrogen filling channel 4 and a vacuum extraction channel 5 within the nozzle structure 3; wherein, The nozzle structure 3 includes a duckbill tube 31 and a flat tube 32 integrally connected, several partitions 33 disposed in the inner cavity of the flat tube 32, several nitrogen-filling flaps 34 and filter membranes 35 disposed in the partitions 33, a torsion spring 36 mounted on the rotating shaft of the nitrogen-filling flaps 34, and a baffle 37 for limiting the upward flipping of the nitrogen-filling flaps 34; the partitions 33 with nitrogen-filling flaps 34 are connected to the nitrogen-filling channel 4, and the partitions 33 with filter membranes 35 are connected to the vacuum channel 5. When the nitrogen-filling hinge 34 is flipped open by the nitrogen-filling pressure, it connects the nitrogen-filling channel 4 and the packaging bag. After the nitrogen filling stops, the nitrogen-filling hinge 34 is reset under the drive of the torsion spring 36 and limited by the baffle 37 to close the nitrogen-filling channel 4 and the packaging bag. The nitrogen-filling hinge 34 also keeps the nitrogen-filling channel 4 closed when vacuuming.

[0023] The bottom opening of the duckbill tube 31 is connected to the top opening of the flat tube 32, and the top opening is connected to the flange 6 at the bottom of the nitrogen filling tube 1 through the flange 6; one end of the vacuum tube 2 extends through the nitrogen filling tube 1 and the flange 6 to the inner cavity of the duckbill tube 31 and is connected to the vacuum channel 5; the vacuum channel 5 is a multi-port tube structure, and the nitrogen filling channel 4 is a cavity between the multi-port tube structure and the inner wall of the duckbill tube 31; multiple interfaces at the bottom of the multi-port tube structure are fixedly connected to the partition 33 where the filter membrane 35 is installed, and one interface at the top of the multi-port tube structure is movably snapped into the vacuum tube 2.

[0024] It should be noted that when using the entire device, first put the packaging bag over the flat tube 32, start the vacuum pump, and extract the gas inside the packaging bag through the vacuum tube 2 and the multi-port tube structure and the filter membrane 35. At this time, the nitrogen filling hinge 34 is subjected to the force of the torsion spring 36 and the limit of the baffle 37, keeping the nitrogen filling channel 4 closed, so that the nitrogen filling channel 4 cannot be connected with the packaging bag, and the powder inside the packaging bag will not enter the nozzle structure 3. Only some powder will be attached to the lower surface of the filter membrane 35. Next, nitrogen filling is performed. Nitrogen gas is introduced into nitrogen filling pipe 1. The downward-introduced nitrogen gas pushes nitrogen filling hinge 34 to flip downward, opening nitrogen filling hinge 34. Torsion spring 36 stores power, and nitrogen filling channel 4 is connected to packaging bag through partition 33. Nitrogen gas enters the packaging bag. After nitrogen filling stops, nitrogen filling hinge 34 is no longer pushed downward and rotates in the opposite direction under the reaction force of torsion spring 36. Under the limit of baffle 37, it is horizontally set to block partition 33, that is, to separate nitrogen filling channel 4 from packaging bag 33. After nitrogen filling is completed, powder will not enter the nozzle. However, during nitrogen filling, some powder attached to the lower surface of the filter membrane 35 will be carried back into the packaging bag by nitrogen gas. The entire device is detachable, and the nozzle structure 3 is replaceable. Specifically, when disassembling the nozzle structure 3, remove the screws and nuts 93 on the flange 6, and the nozzle structure 3 can be separated from the nitrogen filling tube 1. Then pull the nozzle structure 3 downwards to separate its internal multi-port tube structure from the vacuum tube 2. At this time, a new nozzle structure 3 can be installed, which is suitable for use with different packaging bags. During installation, simply align and fit the flange 6, and the multi-port tube structure and the vacuum tube 2 can be snapped together. Finally, connect the flange 6 with the screws and nuts 93.

[0025] like Figure 1-4 As shown, an airbag 7 is fixedly provided on the outer wall of the flat tube 32. The airbag 7 is connected to an external air pump through an inflation tube, and an electromagnetic valve is provided on the inflation tube.

[0026] It should be noted that by setting an airbag 7 outside the flat tube 32, when the packaging bag is placed outside the flat tube 32, the airbag 7 can be inflated by an air pump and an air inflator to seal the opening of the packaging bag, thus preventing powder from adhering to the opening of the bag during nitrogen filling and vacuuming operations, which would make it difficult to seal the bag later.

[0027] like Figure 1-2 and Figure 6 As shown, packaging bag support plates 8 are provided on both sides of the top of the flat tube 32. The two packaging bag support plates 8 are driven by a linear reciprocating drive mechanism 9 to make linear reciprocating motions that move closer or further away from each other. The cross-sections of the two packaging bag support plates 8 are set as mutually symmetrical U-shapes.

[0028] The linear reciprocating drive mechanism 9 includes a screw 91 with opposite threads on its outer walls on both sides, a servo motor 92 that drives the screw 91, two nuts 93 threaded to the threads on the outer walls on both sides of the screw 91, and a shaped rod 94 connecting the two nuts 93 and the two packaging bag support plates 8. The two ends of the screw 91 are connected to the nitrogen filling pipe 1 through bearings and brackets.

[0029] It should be noted that when the packaging bag is placed below the nozzle, it can be placed over the two packaging bag support plates 8, and then the servo motor 92 can be started to drive the screw 91 to rotate. The nut 93 cooperates with the screw 91 and can drive the two packaging bag support plates 8 to move away from each other through the special rod 94 to support the packaging bag. At this time, there is no need to hold the packaging bag by hand. Next, start the air pump to make the airbag 7 open the bag opening and seal it again. Then, perform vacuuming and nitrogen filling operations, which can free up labor and improve processing efficiency.

[0030] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A nozzle device for a vacuum nitrogen-charged powder packaging machine, characterized by: It includes a nitrogen filling tube (1), a vacuum tube (2), and a nozzle structure (3), wherein the nitrogen filling tube (1) and the vacuum tube (2) are respectively connected to the nitrogen filling channel (4) and the vacuum channel (5) within the nozzle structure (3); wherein, The nozzle structure (3) includes a duckbill tube (31) and a flat tube (32) connected as an integral unit, several partitions (33) disposed in the inner cavity of the flat tube (32), several nitrogen-filling flaps (34) and filter membranes (35) disposed in the partitions (33), a torsion spring (36) installed on the rotating shaft of the nitrogen-filling flaps (34), and a baffle (37) for limiting the upward flipping of the nitrogen-filling flaps (34); the partition (33) with the nitrogen-filling flaps (34) is connected to the nitrogen-filling channel (4), and the partition (33) with the filter membranes (35) is connected to the vacuum channel (5); When the nitrogen-filled flap (34) is flipped open by the nitrogen filling pressure, it connects the nitrogen filling channel (4) and the packaging bag. After the nitrogen filling stops, the nitrogen-filled flap (34) is reset under the drive of the torsion spring (36) and limited by the baffle (37) to close the nitrogen filling channel (4) and the packaging bag. The nitrogen-filled flap (34) also keeps the nitrogen filling channel (4) closed when vacuuming. An airbag (7) is fixedly provided on the outer wall of the flat tube (32). The airbag (7) is connected to an external air pump through an inflation tube, and an electromagnetic valve is provided on the inflation tube.

2. A nozzle device for a vacuum nitrogen-filled powder packaging machine according to claim 1, characterized in that: The bottom opening of the duckbill tube (31) is connected to the top opening of the flat tube (32), and the top opening is connected to the flange (6) at the bottom of the nitrogen filling tube (1) through the flange (6).

3. A nozzle device for a vacuum nitrogen-filled powder packaging machine according to claim 1, characterized in that: One end of the vacuum tube (2) passes through the nitrogen filling tube (1) and the flange (6) and extends into the inner cavity of the duckbill tube (31) to communicate with the vacuum channel (5).

4. A nozzle device for a vacuum nitrogen-filled powder packaging machine according to claim 3, characterized in that: The vacuum channel (5) is a multi-port pipe structure, the nitrogen filling channel (4) is a cavity between the multi-port pipe structure and the inner wall of the duckbill tube (31), the multiple interfaces at the bottom of the multi-port pipe structure are fixedly connected to the partition (33) where the filter membrane (35) is installed, and one interface at the top of the multi-port pipe structure is movably snapped into the vacuum tube (2).

5. A nozzle device for a vacuum nitrogen-filled powder packaging machine according to claim 1, characterized in that: The flat tube (32) is provided with packaging bag support plates (8) on both sides of the top. The two packaging bag support plates (8) are driven by a linear reciprocating drive mechanism (9) to make linear reciprocating motions that move closer or further away from each other. The cross-sections of the two packaging bag support plates (8) are set as U-shaped that are symmetrical to each other.

6. A nozzle device for a vacuum nitrogen-filled powder packaging machine according to claim 5, characterized in that: The linear reciprocating drive mechanism (9) includes a screw (91) with opposite threads on its outer walls on both sides, a servo motor (92) for driving the screw (91), two nuts (93) threaded to the threads on the outer walls on both sides of the screw (91), and a shaped rod (94) connecting the two nuts (93) and two packaging bag support plates (8). The two ends of the screw (91) are connected to the nitrogen filling pipe (1) through bearings and brackets.

Images