A de-foaming filling device and a filling process

Abstract

This invention relates to the field of liquid filling technology, and in particular to a foam-free filling device and filling process. The filling device includes: a first insert, a second insert, and an injection tube; an elastic sealing sleeve fitted over the first and second inserts, the bottom opening of which is used to press and seal the opening of the bottle; an expansion structure located between the first and second inserts to increase the distance between them, allowing the elastic sealing sleeve to expand until its bottom opening contour matches the opening contour of the bottle; a sealing cap located above the elastic sealing sleeve to press and seal the top opening of the elastic sealing sleeve; and a pressing mechanism connected to the sealing cap to drive the sealing cap to move axially along the bottle body, allowing the first, second, and injection tubes to insert into or detach from the bottle body. This invention reduces equipment and maintenance costs and ensures 100% compliance with the required air pressure in all bottles before filling.

Description

Technical Field

[0001] This invention relates to the field of liquid filling technology, and in particular to a defoaming filling device and filling process. Background Technology

[0002] Liquid filling is common in the production of various products, such as liquid condiments (soy sauce, vinegar), alcoholic beverages, soft drinks, and liquid cosmetics (perfume, bath products). Due to factors such as the composition of the liquid, the mixing of the liquid with air during filling, and the structure of the inner wall of the bottle, foam often occurs during liquid filling. When the amount of foam is large, it can even lead to the foam overflowing from the bottle opening before the required filling volume is reached, making it impossible to continue filling.

[0003] Currently, to reduce foam generation during filling, one method is to evacuate the bottle, and another is to fill the bottle with a protective gas (such as nitrogen) to displace the air. However, both methods are currently applied to individual bottles. Each bottle to be filled requires a pressure sensor and a solenoid valve for its suction or filling tube. This increases equipment costs. Furthermore, if dozens or hundreds of bottles are filled at once, the failure rate of the numerous pressure sensors and solenoid valves increases. This not only fails to guarantee that all bottles meet the pressure requirements, but also increases maintenance costs. Summary of the Invention

[0004] In view of this, the present invention provides a defoaming filling device to solve the problems of high equipment cost, high maintenance cost, and inability to guarantee that the air pressure of all bottles meets the standard in the existing technology.

[0005] This invention provides a foam-removing filling device, comprising:

[0006] The first cannula is inserted into the bottle mouth during filling and detached from the bottle after filling is completed. The first cannula on the first bottle in a row of bottles is used to connect to a vacuum pump or a nitrogen filling device.

[0007] The second tube is inserted into the bottle mouth during filling and detached from the bottle after filling is completed. It is used to connect the first tube on the adjacent bottle. The second tube connects the inner cavity of a row of bottles, and the second tube on the last bottle in the row is closed.

[0008] An elastic sealing sleeve is fitted over the first and second insertion tubes, and the bottom opening of the elastic sealing sleeve is used to press and seal the opening of the bottle body.

[0009] An expansion structure, located between the first insertion tube and the second insertion tube, is used to increase the distance between the first insertion tube and the second insertion tube so that the elastic sealing sleeve expands until the outline of the bottom opening matches the outline of the bottle opening.

[0010] The injection tube passes through the elastic sealing sleeve and the first insertion tube, with one end located outside the elastic sealing sleeve and connected to the injection device, and the other end extending into the bottle body through the first insertion tube.

[0011] A sealing cap, located above the elastic sealing sleeve, is used to press and seal the top opening of the elastic sealing sleeve;

[0012] A clamping mechanism, connected to the sealing cap, is used to drive the sealing cap to move axially along the bottle body, so that the first insertion tube, the second insertion tube, and the injection tube are inserted into or removed from the bottle body.

[0013] Optionally, the first insertion tube and the second insertion tube are symmetrically arranged about the central axis of the bottle body, and there is a gap between the first insertion tube and the second insertion tube, within which the expansion structure is disposed.

[0014] Optionally, the expansion structure includes an electromagnet and a permanent magnet arranged opposite each other. The electromagnet is fixed to the first insertion tube, and the permanent magnet is fixed to the second insertion tube. The electromagnet repels or attracts the permanent magnet by changing its magnetic poles. When attracted, the first insertion tube and the second insertion tube are inserted into the mouth of the bottle. When repelled, the elastic sealing sleeve expands. The wire of the electromagnet passes through the sealing cover and is connected to a power supply and a controller.

[0015] Optionally, the expansion structure includes an air bag and an air tube, the air bag being located between the first insertion tube and the second insertion tube, one end of the air tube being connected to the air bag, and the other end passing through the sealing cap and connected to the air supply device.

[0016] Optionally, the outer wall contours of the first and second cannulas are D-shaped, and the opposite sides of the first and second cannulas are fitted against the inner wall of the elastic sealing sleeve.

[0017] Optionally, a first adapter pipe and a second adapter pipe are fixed on the sealing cap. Both the first and second adapter pipes pass through the upper and lower sides of the sealing cap. The first adapter pipe is connected to a vacuuming device or a nitrogen filling device via a hose, and the second adapter pipe is connected to the first insertion tube on an adjacent bottle via a hose. The first adapter pipe is inserted into the first insertion tube and has an insertion gap, and the second adapter pipe is inserted into the second insertion tube and has an insertion gap. The top ends of both the first and second insertion tubes are provided with sealing gaskets along the circumferential direction. The sealing cap is used to press and seal the top opening of the elastic sealing sleeve while simultaneously pressing and sealing the sealing gaskets.

[0018] Optionally, the sidewalls of the first and second insertion tubes are provided with circumferentially extending arc-shaped grooves, and elastic rings are provided in the arc-shaped grooves, the elastic rings tightening the first and second insertion tubes.

[0019] Optionally, a connecting rope is connected between the first cannula and the sealing cap and / or between the second cannula and the sealing cap. The connecting rope is used to keep the first cannula, the second cannula and the sealing cap moving vertically synchronously, and to keep the first adapter tube inserted into the first cannula and the second adapter tube inserted into the second cannula during vertical movement. The length of the connecting rope allows the first cannula and the second cannula to move laterally relative to the sealing cap.

[0020] Optionally, an electric valve is provided in the second adapter pipe on the last bottle in a row of bottles.

[0021] Another object of the present invention is to provide a filling process, wherein the filling steps according to the above-described defoaming filling apparatus are as follows:

[0022] The first step is to fix a row of bottles, and to install a foam-removing filling device directly above each bottle;

[0023] The second step is to connect the first tube on the first bottle to a vacuuming device or a nitrogen filling device via a hose, and connect all the bottles in series by connecting the second tube to the first tube via hoses.

[0024] The third step is to activate the clamping mechanism, drive the sealing cap to move downward along the bottle body axis, and move the first insertion tube and the second insertion tube downward through the connecting rope, so that the first insertion tube and the second insertion tube are inserted into the mouth of the bottle body until they are inserted to the bottom of the elastic sealing sleeve and reach the top mouth of the bottle body, at which point the clamping mechanism is stopped.

[0025] The fourth step is to activate the expansion structure to increase the distance between the first and second insertion tubes, causing the elastic sealing sleeve to expand into a cylindrical shape with a bottom diameter that is approximately equal to the diameter of the bottle opening.

[0026] Fifth step, continue to move the sealing cap downward through the pressing mechanism, so that the sealing cap presses and seals the top opening of the elastic sealing sleeve and the sealing gasket, and at the same time presses and seals the bottom opening of the elastic sealing sleeve and the opening of the bottle body.

[0027] Step 6: When performing the vacuuming operation, first seal the second tube on the last bottle in a row, then start the vacuuming equipment. The evacuation time depends on the number of bottles. When performing the nitrogen filling operation, first start the nitrogen filling equipment. The filling time depends on the number of bottles. After the time is up, seal the second tube on the last bottle in a row.

[0028] Step 7: Start the liquid injection device and simultaneously inject a fixed amount of liquid into all the bottles through the liquid injection tube;

[0029] Step 8: Shut down the expansion structure to reduce the distance between the first and second insertion tubes, thereby creating gaps between the first insertion tube and the inner wall of the bottle, and between the second insertion tube and the inner wall of the bottle.

[0030] In the ninth step, the sealing cap is moved upward by the clamping mechanism, and the sealing cap suspends the first insertion tube, the second insertion tube, and the injection tube from the bottle body.

[0031] The technical solution of the present invention has the following advantages:

[0032] 1. It can seal the bottle opening immediately after insertion and connect the inner cavities of multiple bottles. By evacuating or filling the first bottle with nitrogen, the air pressure in the inner cavity of all bottles can be guaranteed to be the same. Only one pressure sensor and one solenoid valve are needed to ensure that the air pressure of all bottles meets the standard. The cost is extremely low. Even if the pressure sensor and solenoid valve fail, they can be replaced quickly. The maintenance cost (including time cost) is extremely low.

[0033] 2. The first insertion tube, the second insertion tube, the injection tube, the sealing cap, and the elastic sealing sleeve can be moved as a whole, which facilitates the rapid movement of the whole to the bottle mouth for sealing, and also facilitates the rapid removal of the whole from the bottle after filling, realizing rapid filling and rapid release of the bottle after filling.

[0034] 3. The sealing gasket is the first seal for the top opening of the first insertion tube and the top opening of the second insertion tube, and the elastic sealing sleeve is the second seal. The double sealing structure ensures the stability of the seal. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a top view of the foam filling device in the embodiment;

[0037] Figure 2 yes Figure 1 A sectional view along the AA direction;

[0038] Figure 3 yes Figure 2 Enlarged view of part A;

[0039] Figure 4 This is a partial exploded view of the foam filling device in the embodiment;

[0040] Figure 5 This is a partial structural schematic diagram of the foam filling device in the embodiment.

[0041] In the picture:

[0042] First insertion tube 1, second insertion tube 2, injection tube 3, outlet hole 31, elastic sealing sleeve 4, expansion structure 5, electromagnet 51, permanent magnet 52, sealing cap 6, clamping mechanism 7, first adapter tube 8, second adapter tube 9, sealing gasket 10, elastic ring 11, connecting rope 12, electric valve 13. Detailed Implementation

[0043] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0044] Unless otherwise explicitly specified and limited, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.

[0045] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of description and simplification, 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 the present invention.

[0046] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0047] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0048] Please refer to Figure 1 and Figure 2 The present invention provides a foam-removing filling device, which mainly includes a first insert 1, a second insert 2, an elastic sealing sleeve 4, a sealing cap 6, an expansion structure 5, and a pressing mechanism 7.

[0049] One of these defoaming filling devices is installed directly above each bottle at the filling station. The defoaming filling devices above adjacent bottles are connected by hoses to achieve series connection of all bottles.

[0050] Please refer to Figure 2 and Figure 3 The first insert 1 is inserted into the bottle opening during filling and detaches from the bottle after filling is complete. The first insert 1 on the first bottle in a row is used to connect to a vacuum pump or a nitrogen filling device. A pressure sensor and a solenoid valve are installed on the first insert 1 connected to the vacuum pump or nitrogen filling device.

[0051] The second insert 2 is inserted into the bottle opening during filling and detaches from the bottle after filling. It connects to the first insert 1 on adjacent bottles. The second insert 2 connects the inner cavities of a row of bottles, and the second insert 2 on the last bottle in the row is closed. Preferably, an electric valve 13 is directly or indirectly installed on the second insert 2 on the last bottle in the row to automatically open or close the second insert 2 on the last bottle.

[0052] The elastic sealing sleeve 4 is fitted over the first insertion tube 1 and the second insertion tube 2 and is located outside the bottle body. The bottom opening of the elastic sealing sleeve 4 is used to press and seal the opening of the bottle body.

[0053] The expansion structure 5 is located between the first insertion tube 1 and the second insertion tube 2, and is used to increase the distance between the first insertion tube 1 and the second insertion tube 2 so that the elastic sealing sleeve 4 expands until the outline of the bottom opening matches the outline of the bottle opening.

[0054] The injection tube 3 passes through the elastic sealing sleeve 4 and the first insertion tube 1. One end is located outside the elastic sealing sleeve 4 and connected to the injection device, while the other end extends into the bottle body through the first insertion tube 1. The bottom end of the injection tube 3 is closed, and multiple outlet holes 31 are provided circumferentially on the side wall of the injection tube 3 near the bottom end. The outlet holes 31 communicate with the inner cavity of the injection tube 3. This design can avoid the formation of foam caused by a large amount of liquid impacting the bottom of the bottle. The liquid is divided into multiple small streams and flows out from the outlet holes 31 on the side of the injection tube 3. When the small streams of liquid hit the inner side wall of the bottle, they spread out and flow down the side wall to the bottom of the bottle. This process is unlikely to generate foam. The areas where the multiple streams of liquid spread out do not overlap or have a small overlapping area, avoiding mutual collision and foam generation.

[0055] The sealing cap 6 is located above the elastic sealing sleeve 4 and is used to press and seal the top opening of the elastic sealing sleeve 4.

[0056] The clamping mechanism 7, connected to the sealing cap 6, is used to drive the sealing cap 6 to move axially along the bottle body, so that the first insertion tube 1, the second insertion tube 2, and the injection tube 3 are inserted into or removed from the bottle body. The clamping mechanism 7 can be in the form of a cylinder or other actuator driving a pressure block to fix the pressure block to the upper surface of the sealing cap 6.

[0057] The working principle of the above-mentioned defoaming filling device is as follows:

[0058] After inserting the first insertion tube 1, the second insertion tube 2, and the injection tube 3 into the bottle, the expansion structure 5 increases the distance between the first insertion tube 1 and the second insertion tube 2, thereby expanding the elastic sealing sleeve 4 to a size comparable to the bottle opening size. Then, the sealing cap 6 is pressed down by the clamping mechanism 7, so that the top of the elastic sealing sleeve 4 is pressed and sealed by the sealing cap 6, and the bottle opening is pressed and sealed by the bottom of the elastic sealing sleeve 4. The second insertion tube 2 on the last bottle is sealed first, and then the vacuum equipment is started to vacuum all the bottles at once. Alternatively, the nitrogen filling equipment is started first to fill all the bottles with nitrogen at once, and then the second insertion tube 2 on the last bottle is sealed. Finally, liquid is injected into the bottle through the injection tube 3, which can avoid the liquid mixing with air and producing foam.

[0059] The order of "sealing the second tube 2 on the last bottle" is different during the vacuuming and nitrogen filling operations. This is because all bottles must be sealed before vacuuming, while the last bottle must be opened before nitrogen filling to allow the air in all bottles to be expelled from the last bottle during nitrogen filling. After the air is expelled, the last bottle is sealed while maintaining nitrogen filling.

[0060] Furthermore, the first insertion tube 1 and the second insertion tube 2 are symmetrically arranged about the central axis of the bottle body, and there is a gap between the first insertion tube 1 and the second insertion tube 2. An expansion structure 5 is provided in the gap. The structure of the expansion structure 5 is not limited, as long as it can control the first insertion tube 1 and the second insertion tube 2 to move away from each other and to move closer to each other. Two forms of expansion structure 5 are given as examples below.

[0061] The first form of the expansion structure 5 includes an electromagnet 51 and a permanent magnet 52 arranged opposite each other. The electromagnet 51 is fixed to the first insertion tube 1, and the permanent magnet 52 is fixed to the second insertion tube 2. The electromagnet 51 repels or attracts the permanent magnet 52 by changing its magnetic poles. When attracted, the first insertion tube 1 and the second insertion tube 2 are inserted into the mouth of the bottle. When repelled, the elastic sealing sleeve 4 expands. The wire of the electromagnet 51 passes through the sealing cover 6 and connects to the power supply and controller. The fixed positions of the electromagnet 51 and the permanent magnet 52 can be interchanged, or the permanent magnet 52 can be replaced by a second electromagnet. The function is achieved by simultaneously controlling the polarities of the two electromagnets.

[0062] The second form of the expansion structure 5: The expansion structure 5 includes an air bag and an air tube. The air bag is located between the first insertion tube 1 and the second insertion tube 2. One end of the air tube is connected to the air bag, and the other end passes through the sealing cap 6 and connects to the air supply device. The air supply device uses a compressed air tank and an air valve to inflate and deflate the air bag.

[0063] Further, please refer to Figures 2 to 4The outer wall contours of the first insertion tube 1 and the second insertion tube 2 are D-shaped, and the opposite sides of the first insertion tube 1 and the second insertion tube 2 are in contact with the inner wall of the elastic sealing sleeve 4. The sealing cap 6 is fixed with a first adapter tube 8 and a second adapter tube 9. The first adapter tube 8 and the second adapter tube 9 both penetrate the upper and lower sides of the sealing cap 6. The first adapter tube 8 is connected to a vacuum pump or a nitrogen filling device through a hose. The second adapter tube 9 is connected to the first insertion tube 1 on the adjacent bottle through a hose. The first adapter tube 8 is inserted into the first insertion tube 1 and has an insertion gap. The second adapter tube 9 is inserted into the second insertion tube 2 and has an insertion gap. The insertion gap allows the first adapter tube 8 and the second adapter tube 9 to move laterally relative to the sealing cap 6. The top ends of the first insertion tube 1 and the second insertion tube 2 are both provided with sealing gaskets 10 along the circumferential direction. The sealing cap 6 is used to press and seal the top opening of the elastic sealing sleeve 4 while pressing and sealing the sealing gaskets 10.

[0064] Further, please refer to Figure 2 , Figure 3 and Figure 5 The sidewalls of the first insertion tube 1 and the second insertion tube 2 are provided with circumferentially extending arc-shaped grooves, and elastic rings 11 are provided in the arc-shaped grooves. The elastic rings 11 tighten the first insertion tube 1 and the second insertion tube 2; a connecting rope 12 is connected between the first insertion tube 1 and the sealing cap 6 and / or between the second insertion tube 2 and the sealing cap 6 (see...). Figure 3 The connecting rope 12 is used to keep the first insertion tube 1, the second insertion tube 2 and the sealing cap 6 moving vertically in sync. During the vertical movement, the first adapter tube 8 is inserted into the first insertion tube 1 and the second adapter tube 9 is inserted into the second insertion tube 2. The length of the connecting rope 12 allows the first insertion tube 1 and the second insertion tube 2 to move laterally relative to the sealing cap 6.

[0065] Please refer to Figure 5 The elastic ring 11 binds the first insertion tube 1 and the second insertion tube 2, so that the first insertion tube 1 and the second insertion tube 2 are always at the same height. After the first insertion tube 1 and the second insertion tube 2 are bound together as a whole, the number of connecting ropes 12 can be reduced, and only one connecting rope 12 is needed to achieve the function.

[0066] Please refer to Figure 2 In summary, regarding the defoaming filling device described above, this embodiment of the invention also provides a defoaming filling process, with the following filling steps:

[0067] The first step is to fix a row of bottles, and install a foam-removing filling device directly above each bottle;

[0068] The second step is to connect the first tube 1 on the first bottle to the vacuum equipment or nitrogen filling equipment through a hose, and connect all the bottles in series by connecting the second tube 2 to the first tube 1 through a hose.

[0069] The third step is to start the clamping mechanism 7, drive the sealing cap 6 to move downward along the bottle body axis, and the sealing cap 6 suspends the first insertion tube 1 and the second insertion tube 2 downward through the connecting rope 12, so that the first insertion tube 1 and the second insertion tube 2 are inserted into the mouth of the bottle body until the bottom of the elastic sealing sleeve 4 reaches the top mouth of the bottle body and the clamping mechanism 7 is stopped.

[0070] The fourth step is to activate the expansion structure 5 to increase the distance between the first insertion tube 1 and the second insertion tube 2, so that the elastic sealing sleeve 4 expands into a cylindrical shape and the bottom diameter is equivalent to the mouth diameter of the bottle.

[0071] Fifth step, continue to move the sealing cap 6 downward through the pressing mechanism 7, so that the sealing cap 6 presses and seals the top opening of the elastic sealing sleeve 4 and the sealing gasket 10, and at the same time presses and seals the bottom opening of the elastic sealing sleeve 4 and the opening of the bottle body.

[0072] Step 6: When performing the vacuuming operation, first seal the second tube 2 on the last bottle in a row, then start the vacuuming equipment. The evacuation time depends on the number of bottles. When performing the nitrogen filling operation, first start the nitrogen filling equipment. The filling time depends on the number of bottles. After the time is up, seal the second tube 2 on the last bottle in a row.

[0073] Step 7: Start the liquid injection device and simultaneously inject a fixed amount of liquid into all bottles through injection tube 3;

[0074] Step 8: Shut down the expansion structure 5 to reduce the distance between the first insertion tube 1 and the second insertion tube 2, so that gaps are formed between the first insertion tube 1 and the inner wall of the bottle, and between the second insertion tube 2 and the inner wall of the bottle, so that the first insertion tube 1 and the second insertion tube 2 can be dislodged from the bottle opening.

[0075] In the ninth step, the sealing cap 6 is moved upward by the clamping mechanism 7, and the sealing cap 6 suspends the first insertion tube 1, the second insertion tube 2 and the injection tube 3 and separates them from the bottle body.

[0076] After filling is completed, the bottles are released for the subsequent capping process.

[0077] The foam-removing filling device proposed in this invention can seal the bottle opening immediately after insertion and connect the inner cavities of multiple bottles. By performing a vacuuming or nitrogen filling operation on the first bottle, the air pressure in the inner cavity of all bottles can be guaranteed to be the same. Only one air pressure sensor and one solenoid valve are needed to ensure that the air pressure of all bottles meets the standard. The cost is extremely low. Even if the air pressure sensor and solenoid valve fail, they can be quickly replaced, and the maintenance cost (including time cost) is extremely low.

[0078] The first insertion tube 1, the second insertion tube 2, the injection tube 3, the sealing cap 6, and the elastic sealing sleeve 4 can be moved as a whole, which facilitates the rapid movement of the whole to the bottle mouth for sealing, and also facilitates the rapid removal of the whole from the bottle after filling, thus realizing rapid filling and rapid release of the bottle after filling.

[0079] The sealing gasket 10 provides the first seal for the top opening of the first insertion tube 1 and the top opening of the second insertion tube 2, while the elastic sealing sleeve 4 provides the second seal. This double sealing structure ensures the stability of the seal.

[0080] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A foam-removing filling device, characterized in that, include: The first cannula is inserted into the bottle mouth during filling and detached from the bottle after filling is completed. The first cannula on the first bottle in a row of bottles is used to connect to a vacuum pump or a nitrogen filling device. The second tube is inserted into the bottle mouth during filling and detached from the bottle after filling is completed. It is used to connect the first tube on the adjacent bottle. The second tube connects the inner cavity of a row of bottles, and the second tube on the last bottle in the row is closed. An elastic sealing sleeve is fitted over the first and second insertion tubes, and the bottom opening of the elastic sealing sleeve is used to press and seal the opening of the bottle body. An expansion structure, located between the first insertion tube and the second insertion tube, is used to increase the distance between the first insertion tube and the second insertion tube so that the elastic sealing sleeve expands until the outline of the bottom opening matches the outline of the bottle opening. The injection tube passes through the elastic sealing sleeve and the first insertion tube, with one end located outside the elastic sealing sleeve and connected to the injection device, and the other end extending into the bottle body through the first insertion tube. A sealing cap, located above the elastic sealing sleeve, is used to press and seal the top opening of the elastic sealing sleeve; A clamping mechanism, connected to the sealing cap, is used to drive the sealing cap to move axially along the bottle body, so that the first insertion tube, the second insertion tube, and the injection tube are inserted into or removed from the bottle body.

2. The defoaming filling device according to claim 1, characterized in that, The first insertion tube and the second insertion tube are symmetrically arranged about the central axis of the bottle body, and there is a gap between the first insertion tube and the second insertion tube, within which the expansion structure is disposed.

3. The defoaming filling device according to claim 2, characterized in that, The expansion structure includes an electromagnet and a permanent magnet arranged opposite each other. The electromagnet is fixed to the first insertion tube, and the permanent magnet is fixed to the second insertion tube. The electromagnet repels or attracts the permanent magnet by changing its magnetic poles. When attracted, the first and second insertion tubes are inserted into the mouth of the bottle. When repelled, the elastic sealing sleeve expands. The wire of the electromagnet passes through the sealing cover and is connected to the power supply and controller.

4. The defoaming filling device according to claim 2, characterized in that, The expansion structure includes an air bag and an air tube. The air bag is located between the first insertion tube and the second insertion tube. One end of the air tube is connected to the air bag, and the other end passes through the sealing cap and is connected to the air supply device.

5. The defoaming filling device according to claim 3 or 4, characterized in that, The outer wall contours of the first and second cannulas are D-shaped, and the opposite sides of the first and second cannulas are in contact with the inner wall of the elastic sealing sleeve.

6. The defoaming filling device according to claim 5, characterized in that, The sealing cap is fixed with a first adapter pipe and a second adapter pipe, both of which extend through the upper and lower sides of the sealing cap. The first adapter pipe is connected to a vacuum pump or a nitrogen filling device via a hose, and the second adapter pipe is connected to the first insertion tube on an adjacent bottle via a hose. The first adapter pipe is inserted into the first insertion tube with an insertion gap, and the second adapter pipe is inserted into the second insertion tube with an insertion gap. The top ends of both the first and second insertion tubes are provided with sealing gaskets along the circumferential direction. The sealing cap is used to press and seal the top opening of the elastic sealing sleeve while simultaneously pressing and sealing the sealing gaskets.

7. The defoaming filling device according to claim 6, characterized in that, The sidewalls of the first and second insertion tubes are provided with circumferentially extending arc-shaped grooves, and elastic rings are provided in the arc-shaped grooves, which tighten the first and second insertion tubes.

8. The defoaming filling device according to claim 7, characterized in that, A connecting rope is connected between the first cannula and the sealing cap and / or between the second cannula and the sealing cap. The connecting rope is used to keep the first cannula, the second cannula and the sealing cap moving vertically synchronously, and to keep the first adapter tube inserted into the first cannula and the second adapter tube inserted into the second cannula during vertical movement. The length of the connecting rope allows the first cannula and the second cannula to move laterally relative to the sealing cap.

9. The defoaming filling device according to claim 8, characterized in that, An electric valve is installed in the second adapter pipe on the last bottle in a row of bottles.

10. A filling process, comprising the defoaming filling apparatus according to claim 9, characterized in that, The filling steps are as follows: The first step is to fix a row of bottles, and to install a foam-removing filling device directly above each bottle; The second step is to connect the first tube on the first bottle to a vacuuming device or a nitrogen filling device via a hose, and connect all the bottles in series by connecting the second tube to the first tube via hoses. The third step is to activate the clamping mechanism, drive the sealing cap to move downward along the bottle body axis, and move the first insertion tube and the second insertion tube downward through the connecting rope, so that the first insertion tube and the second insertion tube are inserted into the mouth of the bottle body until they are inserted to the bottom of the elastic sealing sleeve and reach the top mouth of the bottle body, at which point the clamping mechanism is stopped. The fourth step is to activate the expansion structure to increase the distance between the first and second insertion tubes, causing the elastic sealing sleeve to expand into a cylindrical shape with a bottom diameter that is approximately equal to the diameter of the bottle opening. Fifth step, continue to move the sealing cap downward through the pressing mechanism, so that the sealing cap presses and seals the top opening of the elastic sealing sleeve and the sealing gasket, and at the same time presses and seals the bottom opening of the elastic sealing sleeve and the opening of the bottle body. Step 6: When performing the vacuuming operation, first seal the second tube on the last bottle in a row, then start the vacuuming equipment. The evacuation time depends on the number of bottles. When performing the nitrogen filling operation, first start the nitrogen filling equipment. The filling time depends on the number of bottles. After the time is up, seal the second tube on the last bottle in a row. Step 7: Start the liquid injection device and simultaneously inject a fixed amount of liquid into all the bottles through the liquid injection tube; Step 8: Shut down the expansion structure to reduce the distance between the first and second insertion tubes, thereby creating gaps between the first insertion tube and the inner wall of the bottle, and between the second insertion tube and the inner wall of the bottle. In the ninth step, the sealing cap is moved upward by the clamping mechanism, and the sealing cap suspends the first insertion tube, the second insertion tube, and the injection tube from the bottle body.

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