Nitrogen residue reflux system

Abstract

The utility model discloses a nitrogen residue backflow system, and relates to the technical field of nitrogen filling. The device comprises a filling table, a lifting filling assembly is arranged at the top of the filling table, a backflow assembly is arranged at the filling end of the lifting filling assembly, a staggered sealing assembly is arranged at the filling end of the lifting filling assembly, a pushing assembly is arranged on the outer surface of the lifting filling assembly, and the pushing assembly and the staggered sealing assembly are connected together. According to the food packaging machine, the pushing assembly and the limiting assembly are arranged, so that when the filling end of the lifting filling assembly moves out of a food package, the staggered sealing assembly can automatically relieve sealing of the backflow assembly, and sealing of the filling end is completed at the same time; and at the moment, the backflow assembly can normally recover the residual nitrogen in the filling end, so that the situation that when the nitrogen is subsequently filled into the food package, the amount of the nitrogen in the food package is difficult to accurately control due to the residual nitrogen at the filling end is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of nitrogen filling technology, and specifically relates to a nitrogen residual reflux system. Background Technology

[0002] Nitrogen plays a crucial role in food preservation due to its inert properties. Nitrogen filling is the core step in nitrogen-filled food packaging, directly affecting food quality and shelf life. On food production lines, filling equipment injects hydrogen from large nitrogen storage devices into food packaging.

[0003] The amount of nitrogen injected into food packaging through the filling tube is mainly controlled by a flow valve. However, to ensure that the filling tube port can move normally into the food packaging, the flow valve is usually installed at a certain distance from the filling tube port. This means that nitrogen can easily remain between the flow valve and the filling tube port after filling. Since nitrogen needs to be filled into the food packaging in a measured amount, the residual nitrogen makes it difficult to accurately control the amount of nitrogen injected into the food packaging. Furthermore, when the filling tube is moved out of the food packaging, the nitrogen remaining in the filling tube can easily flow directly into the external environment, thus wasting nitrogen resources.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a nitrogen residual reflux system to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a nitrogen residual reflux system, including a filling platform. A lifting filling component is provided on the top of the filling platform. A reflux component is provided at the filling end of the lifting filling component. An interleaved sealing component is provided at the filling end of the lifting filling component. A pushing component is provided on the outer surface of the lifting filling component. The pushing component is connected to the interleaved sealing component. A limit component is provided inside the filling platform corresponding to the pushing component.

[0008] When the lifting and filling assembly moves upward, the limiting assembly releases its limit on the pushing assembly, so that the staggered sealing assembly seals the filling end of the lifting and filling assembly under the push of the pushing assembly. At the same time, the staggered sealing assembly releases its seal on the reflux assembly, and the reflux assembly begins to recover the nitrogen gas remaining inside the filling end.

[0009] Furthermore, the lifting and filling assembly includes a hydraulic cylinder, which is fixedly installed on the top of the filling platform. The output end of the hydraulic cylinder extends into the interior of the filling platform and is fixedly connected to a lifting frame. A transport pipe is fixedly connected inside the lifting frame. The bottom end of the transport pipe passes through the lifting frame and is fixedly installed with a flow valve. A filling pipe is fixedly installed at the bottom of the flow valve. The bottom of the filling pipe is tapered, and a filling head is fixedly connected to the bottom end of the filling pipe.

[0010] Furthermore, the reflux assembly includes an extraction hole, which is formed on the inner wall of the filling tube. An extraction tube is fixedly connected to the outer surface of the filling tube corresponding to the extraction hole. A vacuum pump is fixedly installed on the top of the filling station. One end of the extraction tube is connected to the extraction end of the vacuum pump, and a reflux tube is fixedly connected to the delivery end of the vacuum pump.

[0011] Furthermore, the staggered sealing assembly includes an L-shaped sealing rod, which is movably connected to the filling head. A support rod is fixedly connected to the outer surface of the L-shaped sealing rod, and a first sealing plate is fixedly connected to one end of the support rod. A second sealing plate is fixedly connected to the outer surface of the L-shaped sealing rod. A through groove is provided on the outer surface of the filling tube, and a push plate is provided on the outer side of the filling tube. The push plate is fixedly connected to the second sealing plate through the through groove.

[0012] Furthermore, the inner wall of the filling tube is provided with a plurality of sealing grooves corresponding to the first sealing plate and the second sealing plate, and a sealing strip is movably connected inside each of the plurality of sealing grooves. The plurality of sealing strips are respectively fixedly connected to the corresponding first sealing plate and the second sealing plate.

[0013] Furthermore, the pushing assembly includes a fixed plate, two of which are fixedly connected to the outer surface of the filling tube. A fixed rod is fixedly connected between the two fixed plates, and the fixed rod is movably connected to the pushing plate. A spring is fixedly connected between the top of the pushing plate and the bottom of the fixed plate.

[0014] Furthermore, the limiting component includes an adjusting screw, which is rotatably connected to the top of the filling platform. A limiting frame is threadedly connected to the outer surface of the adjusting screw. An adjusting motor is fixedly installed on the top of the filling platform, and the output end of the adjusting motor is fixedly connected to the adjusting screw. A guide rod is fixedly connected to the bottom of the inner wall of the filling platform, and the guide rod is movably connected to the limiting frame.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model, by setting a pushing component and a limiting component, allows the filling end of the lifting filling component to move out of the food packaging while the staggered sealing component automatically releases the seal on the reflux component and simultaneously seals the filling end. At this time, the reflux component can normally recover the nitrogen gas remaining inside the filling end, thus avoiding the difficulty in accurately controlling the amount of nitrogen inside the food packaging due to the residual nitrogen gas at the filling end when filling nitrogen gas into the food packaging later. It also prevents the residual nitrogen gas from flowing directly into the external environment after the filling head moves out of the food packaging, thus ensuring that nitrogen resources can be fully utilized.

[0017] 2. This utility model drives the adjusting screw through the adjusting motor, so that the height of the limiting frame can be adjusted according to the different heights of food packaging under the drive of the adjusting screw and the guidance of the guide rod. This ensures that when the filling head moves into or out of the food packaging, the limiting frame and the push plate can always maintain cooperation, and the transition of the sealing state between the filling head and the extraction hole can be completed normally.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the external outline structure of this utility model;

[0021] Figure 2 For the present utility model Figure 1 Rear view structural diagram;

[0022] Figure 3 This is a schematic diagram of the limiting component structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the lifting and filling assembly structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the staggered sealing assembly structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the sealing groove structure of this utility model;

[0026] Figure 7This is a schematic diagram of the sealing plate structure of this utility model.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Filling table; 2. Lifting and filling assembly; 201. Hydraulic cylinder; 202. Lifting frame; 203. Transport pipe; 204. Flow valve; 205. Filling pipe; 206. Filling head; 3. Return assembly; 301. Extraction hole; 302. Extraction pipe; 303. Vacuum pump; 304. Return pipe; 4. Interlocking sealing assembly; 401. L-shaped sealing rod; 402. Support rod; 403. First sealing plate; 404. Second sealing plate; 405. Through groove; 406. Push plate; 407. Sealing groove; 408. Sealing strip; 5. Push assembly; 501. Fixing plate; 502. Fixing rod; 503. Spring; 6. Limiting assembly; 601. Adjusting screw; 602. Limiting frame; 603. Adjusting motor; 604. Guide rod. Detailed Implementation

[0029] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0030] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements 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 the utility model.

[0031] Please see Figures 1-7 As shown, this utility model is a nitrogen residual reflux system, including a filling platform 1, a lifting filling assembly 2 is provided on the top of the filling platform 1, a reflux assembly 3 is provided at the filling end of the lifting filling assembly 2, an interleaved sealing assembly 4 is provided at the filling end of the lifting filling assembly 2, a pushing assembly 5 is provided on the outer surface of the lifting filling assembly 2, the pushing assembly 5 is connected to the interleaved sealing assembly 4, and a limit assembly 6 is provided inside the filling platform 1 corresponding to the pushing assembly 5.

[0032] When the lifting filling assembly 2 moves upward, the limiting assembly 6 releases its restriction on the pushing assembly 5, so that the staggered sealing assembly 4 seals the filling end of the lifting filling assembly 2 under the push of the pushing assembly 5. At the same time, the staggered sealing assembly 4 releases its seal on the reflux assembly 3, and the reflux assembly 3 begins to recover the nitrogen gas remaining inside the filling end.

[0033] A transport device is installed at the bottom of the inner wall of the filling station 1. The transport device can transport the food packaging to the lower side of the lifting filling component 2. After the lifting filling component 2 completes the nitrogen filling of the food packaging, the filling end of the lifting filling component 2 moves upward and moves out of the inside of the food packaging. At this time, the limiting component 6 no longer limits the pushing component 5, so that the pushing component 5 can push the staggered sealing component 4 downward, thereby releasing the seal of the staggered sealing component 4 on the return component 3 and completing the seal of the filling end. Then the return component 3 extracts the nitrogen gas remaining inside the filling end.

[0034] By setting the pushing component 5 and the limiting component 6, the filling end of the lifting filling component 2 moves out of the food packaging. At the same time, the staggered sealing component 4 can automatically release the seal on the return component 3 and complete the sealing of the filling end. At this time, the return component 3 can normally recover the nitrogen gas remaining inside the filling end. This avoids the difficulty in accurately controlling the amount of nitrogen gas inside the food packaging due to the residual nitrogen gas at the filling end when filling nitrogen gas into the food packaging later. It also prevents the residual nitrogen gas from flowing directly into the external environment after the filling head moves out of the food packaging, so that the nitrogen gas resource can be fully utilized.

[0035] In one embodiment, the lifting and filling assembly 2 includes a hydraulic cylinder 201, which is fixedly installed on the top of the filling platform 1. The output end of the hydraulic cylinder 201 extends into the interior of the filling platform 1 and is fixedly connected to a lifting frame 202. A transport pipe 203 is fixedly connected inside the lifting frame 202. The bottom end of the transport pipe 203 passes through the lifting frame 202 and is fixedly installed with a flow valve 204. A filling pipe 205 is fixedly installed at the bottom of the flow valve 204. The bottom of the filling pipe 205 is tapered, and a filling head 206 is fixedly connected to the bottom end of the filling pipe 205.

[0036] The transport pipe 203 is connected to an external nitrogen storage device. By driving the hydraulic cylinder 201, the output end of the hydraulic cylinder 201 moves the transport pipe 203 downward through the lifting frame 202, allowing the filling head 206 to move directly into the food packaging. At this time, the flow valve 204 opens, and the nitrogen gas inside the nitrogen storage device flows directly into the food packaging through the transport pipe 203, flow valve 204, filling pipe 205, and filling head 206. When the nitrogen gas storage inside the food packaging reaches a predetermined value, the flow valve 204 closes, and the filling head 206 can move out of the food packaging under the drive of the hydraulic cylinder 201.

[0037] In one embodiment, the reflux assembly 3 includes an extraction hole 301, which is formed on the inner wall of the filling tube 205. An extraction tube 302 is fixedly connected to the outer surface of the filling tube 205 corresponding to the extraction hole 301. A vacuum pump 303 is fixedly installed on the top of the filling platform 1. One end of the extraction tube 302 is connected to the extraction end of the vacuum pump 303. A reflux tube 304 is fixedly connected to the delivery end of the vacuum pump 303.

[0038] The other end of the return pipe 304 is connected to the nitrogen storage device. When the filling head 206 moves out of the food packaging, the vacuum pump 303 extracts the nitrogen gas inside the filling pipe 205 through the extraction pipe 302 and the extraction hole 301. At this time, the nitrogen gas remaining inside the filling pipe 205 can flow back into the nitrogen storage device through the extraction pipe 302 and the return pipe 304.

[0039] In one embodiment, the staggered sealing assembly 4 includes an L-shaped sealing rod 401, which is movably connected to the filling head 206. A support rod 402 is fixedly connected to the outer surface of the L-shaped sealing rod 401. A first sealing plate 403 is fixedly connected to one end of the support rod 402. A second sealing plate 404 is fixedly connected to the outer surface of the L-shaped sealing rod 401. A through groove 405 is provided on the outer surface of the filling tube 205. A push plate 406 is provided on the outer side of the filling tube 205. The push plate 406 is fixedly connected to the second sealing plate 404 through the through groove 405.

[0040] When the filling head 206 moves out of the food packaging, the push plate 406 pushes the second sealing plate 404 through the through groove 405, causing the L-shaped sealing rod 401 to move downward under the action of the second sealing plate 404, and allowing the L-shaped sealing rod 401 to move into the filling head 206. At the same time, the first sealing plate 403 no longer blocks the extraction hole 301. The above arrangement ensures that when the vacuum pump 303 extracts the nitrogen gas remaining inside the filling tube 205, the air outside the filling tube 205 will not flow into the extraction tube 302, thus ensuring the overall purity of the nitrogen gas during reflux. At the same time, when filling nitrogen gas, the first sealing plate 403 can block the extraction hole 301. This arrangement prevents the nitrogen gas flowing inside the filling tube 205 from flowing into the extraction tube 302 through the extraction hole 301, thus allowing precise control of the amount of nitrogen gas flowing into the food packaging.

[0041] In one embodiment, for the filling tube 205, the inner wall of the filling tube 205 is provided with a plurality of sealing grooves 407 corresponding to the first sealing plate 403 and the second sealing plate 404. Each of the plurality of sealing grooves 407 is movably connected with a sealing strip 408, and the plurality of sealing strips 408 are respectively fixedly connected to the corresponding first sealing plate 403 and the second sealing plate 404.

[0042] The first sealing plate 403 and the second sealing plate 404 can drive the corresponding sealing strip 408 to move inside a plurality of sealing grooves 407, thereby ensuring the sealing performance of the first sealing plate 403 when sealing the extraction hole 301; at the same time, the second sealing plate 404 can always maintain the seal on the through groove 405 when it moves, and with the assistance of the sealing strip 408 and the sealing groove 407, the sealing performance of the second sealing plate 404 when sealing the through groove 405 can also be guaranteed.

[0043] In one embodiment, the pushing component 5 includes a fixing plate 501. Two fixing plates 501 are fixedly connected to the outer surface of the filling tube 205. A fixing rod 502 is fixedly connected between the two fixing plates 501. The fixing rod 502 is movably connected to the pushing plate 406. A spring 503 is fixedly connected between the top of the pushing plate 406 and the bottom of the fixing plate 501.

[0044] Spring 503 can push the push plate 406 downwards. During nitrogen filling, when the filling head 206 moves downwards, the limiting component 6 can limit the push plate 406, preventing it from moving downwards with the filling tube 205. As the filling head 206 continues to move, the push plate 406 pushes the second sealing plate 404 upwards through the through groove 405, causing the L-shaped sealing rod 401 to move upwards. When the filling head 206 moves into the food packaging, the L-shaped sealing rod 401... 1. The filling head 206 is completely moved out of the filling head 206. At the same time, the first sealing plate 403, driven by the L-shaped sealing rod 401, seals the extraction hole 301. When the filling head 206 moves upward, the spring 503 can push the push plate 406 downward, so that the L-shaped sealing rod 401 seals the filling head 206. At the same time, the first sealing plate 403 releases its obstruction of the extraction hole 301. The above-mentioned setting allows the sealing state between the filling head 206 and the extraction hole 301 to be automatically changed by raising and lowering the filling head 206.

[0045] In one embodiment, the limiting component 6 includes an adjusting screw 601, which is rotatably connected to the top of the filling platform 1. A limiting frame 602 is threadedly connected to the outer surface of the adjusting screw 601. An adjusting motor 603 is fixedly installed on the top of the filling platform 1, and the output end of the adjusting motor 603 is fixedly connected to the adjusting screw 601. A guide rod 604 is fixedly connected to the bottom of the inner wall of the filling platform 1, and the guide rod 604 is movably connected to the limiting frame 602.

[0046] By driving the adjusting motor 603, the adjusting screw 601 can be rotated. At this time, the height of the limiting frame 602 can be adjusted under the drive of the adjusting screw 601 and the guidance of the guide rod 604. This setting allows the height of the limiting frame 602 to be adjusted accordingly when filling food packaging of different heights with nitrogen. This ensures that the sealing state between the filling head 206 and the extraction hole 301 can be switched normally when the filling head 206 moves into or out of the food packaging.

[0047] Through the above technical solution, 1. By setting the pushing component 5 and the limiting component 6, the filling end of the lifting filling component 2 moves out of the food packaging, while the staggered sealing component 4 automatically releases the seal on the return component 3 and simultaneously seals the filling end. At this time, the return component 3 can normally recover the nitrogen gas remaining inside the filling end, thus avoiding the difficulty in accurately controlling the amount of nitrogen inside the food packaging due to the residual nitrogen gas at the filling end when filling nitrogen gas into the food packaging later. It also prevents the filling head from moving out of the food packaging. Afterwards, the residual nitrogen flows directly into the external environment, thus making full use of nitrogen resources; 2. By adjusting the motor 603 to drive the adjusting screw 601, the limiting frame 602 can be adjusted in height according to the different heights of food packaging under the drive of the adjusting screw 601 and the guidance of the guide rod 604. This ensures that when the filling head 206 moves into or out of the food packaging, the limiting frame 602 and the push plate 406 can always maintain cooperation, and the sealing state transition between the filling head 206 and the extraction hole 301 can be completed normally.

[0048] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A nitrogen residual reflux system comprising a filling station (1), characterized in that, The top of the filling station (1) is provided with a lifting filling assembly (2), the filling end of the lifting filling assembly (2) is provided with a reflux assembly (3), the filling end of the lifting filling assembly (2) is provided with an interlaced sealing assembly (4), the outer surface of the lifting filling assembly (2) is provided with a pushing assembly (5), the pushing assembly (5) is connected to the interlaced sealing assembly (4), and the interior of the filling station (1) is provided with a limit assembly (6) corresponding to the pushing assembly (5). When the lifting filling assembly (2) moves upward, the limiting assembly (6) releases the limiting of the pushing assembly (5) so that the staggered sealing assembly (4) seals the filling end of the lifting filling assembly (2) under the pushing of the pushing assembly (5). At the same time, the staggered sealing assembly (4) releases the seal of the reflux assembly (3), and the reflux assembly (3) begins to recover the nitrogen gas remaining inside the filling end.

2. A nitrogen residue return system according to claim 1, wherein, The lifting and filling assembly (2) includes a hydraulic cylinder (201), which is fixedly installed on the top of the filling platform (1). The output end of the hydraulic cylinder (201) extends into the interior of the filling platform (1) and is fixedly connected to a lifting frame (202). The interior of the lifting frame (202) is fixedly connected to a transport pipe (203). The bottom end of the transport pipe (203) passes through the lifting frame (202) and is fixedly installed with a flow valve (204). The bottom of the flow valve (204) is fixedly installed with a filling pipe (205). The bottom of the filling pipe (205) is tapered, and the bottom end of the filling pipe (205) is fixedly connected to a filling head (206).

3. A nitrogen residue return system according to claim 2, wherein, The reflux assembly (3) includes an extraction hole (301), which is opened on the inner wall of the filling tube (205). An extraction tube (302) is fixedly connected to the outer surface of the filling tube (205) corresponding to the extraction hole (301). A vacuum pump (303) is fixedly installed on the top of the filling station (1). One end of the extraction tube (302) is connected to the extraction end of the vacuum pump (303). A reflux tube (304) is fixedly connected to the delivery end of the vacuum pump (303).

4. A nitrogen residue return system according to claim 3, wherein, The staggered sealing assembly (4) includes an L-shaped sealing rod (401), which is movably connected to the filling head (206). A support rod (402) is fixedly connected to the outer surface of the L-shaped sealing rod (401). A first sealing plate (403) is fixedly connected to one end of the support rod (402). A second sealing plate (404) is fixedly connected to the outer surface of the L-shaped sealing rod (401). A through groove (405) is provided on the outer surface of the filling tube (205). A push plate (406) is provided on the outer side of the filling tube (205). The push plate (406) is fixedly connected to the second sealing plate (404) through the through groove (405).

5. A nitrogen residue return system according to claim 4, wherein, The inner wall of the filling tube (205) is provided with a plurality of sealing grooves (407) corresponding to the first sealing plate (403) and the second sealing plate (404). Each of the plurality of sealing grooves (407) is movably connected with a sealing strip (408). The plurality of sealing strips (408) are respectively fixedly connected to the corresponding first sealing plate (403) and the second sealing plate (404).

6. A nitrogen residue return system according to claim 5, wherein, The pushing assembly (5) includes a fixing plate (501), two fixing plates (501) are fixedly connected to the outer surface of the filling tube (205), a fixing rod (502) is fixedly connected between the two fixing plates (501), the fixing rod (502) is movably connected to the pushing plate (406), and a spring (503) is fixedly connected between the top of the pushing plate (406) and the bottom of the fixing plate (501).

7. The nitrogen residue reflux system of claim 1, wherein, The limiting component (6) includes an adjusting screw (601), which is rotatably connected to the top of the filling platform (1). The outer surface of the adjusting screw (601) is threadedly connected to a limiting frame (602). An adjusting motor (603) is fixedly installed on the top of the filling platform (1). The output end of the adjusting motor (603) is fixedly connected to the adjusting screw (601). A guide rod (604) is fixedly connected to the bottom of the inner wall of the filling platform (1). The guide rod (604) is movably connected to the limiting frame (602).

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