A double-pipe liquid taking device, a liquid taking system and a liquid taking method

Abstract

This invention proposes a dual-pipeline liquid extraction device, comprising an extraction body, a switch valve core, and a flow guide. The extraction body has a sealing sleeve at its lower part and a liquid outlet on one side. A first cavity is internally connected to the extraction body, with the liquid outlet communicating with the middle of the first cavity. The flow guide connects to the lower part of the body and forms multiple flow guide zones with the sealing sleeve. A second cavity is located inside the flow guide, with a connecting hole at its upper part connecting the flow guide zones and the second cavity. A check valve is located in the middle of the second cavity. The valve core has an air inlet channel and a radial air outlet hole at its bottom. A first sealing structure and an outlet channel are located in the middle of the valve core. The top of the valve core is positioned in the opening at the upper part of the body via an elastic reset structure, causing the first sealing structure to block the outlet channel and the air outlet hole to be closed by the check valve. When the valve core is pressed and undergoes axial displacement, the outlet channel is opened and the air outlet hole is released. This invention allows for simultaneous air inflation and liquid extraction operations by pressing the valve core with an external inflation structure.

Description

Technical Field

[0001] This invention belongs to the technical field of aeration liquid extraction, and specifically relates to a dual-pipeline liquid extraction device, liquid extraction system, and liquid extraction method. Background Technology

[0002] Current gas-filled liquid extraction technology replaces the liquid inside the bottle by injecting gas. These extraction devices generally include single-channel and dual-channel models. Single-channel devices share both extraction and gas filling channels, requiring pre-filling with gas before extraction and demanding relatively high inlet pressure, potentially leading to gas waste or bottle explosion. Dual-channel devices separate the extraction and gas filling channels, but existing dual-channel devices have relatively complex structures, requiring manual pre-adjustment of the internal channel connections, which somewhat impacts the user experience. Summary of the Invention

[0003] In order to solve the above-mentioned problems in the prior art, this application provides a dual-pipeline liquid extraction device, liquid extraction system and liquid extraction method to solve the above-mentioned technical defects.

[0004] According to a first aspect of the present invention, a dual-pipeline liquid extraction device is provided, comprising a liquid extraction body, a switching valve core, a sealing sleeve, and a flow guide.

[0005] A sealing sleeve is fitted onto the lower part of the liquid-collecting body to seal with the bottle opening of the liquid-collecting bottle. The upper part of the liquid-collecting body is provided with an opening, and one side of the liquid-collecting body is provided with a liquid outlet. The interior of the liquid-collecting body is provided with a first cavity for accommodating the switch valve core, and the liquid outlet is connected to the middle of the first cavity.

[0006] The flow guide is connected to the lower part of the liquid taking body and inserted into the sealing sleeve. The circumferential surface of the flow guide is provided with axial flow guide vanes at intervals to form multiple flow guide areas on the circumferential surface of the sealing sleeve and the flow guide. The flow guide is provided with a second cavity inside, and the upper part of the flow guide is provided with a connecting hole that connects the flow guide area and the second cavity. A check valve is sealed in the middle of the second cavity.

[0007] The lower part of the switch valve core passes through the first cavity and engages with the check valve inside the guide section. The switch valve core has an air inlet channel inside and an air outlet hole that connects to the air inlet channel runs radially through its lower part. A first sealing structure and a liquid outlet channel are provided on the central circumferential surface of the switch valve core. The top of the switch valve core is positioned in the opening cavity via an elastic reset structure, so that the first sealing structure blocks the liquid outlet channel and the air outlet hole is sealed by the check valve. When the switch valve core is pressed and undergoes axial displacement, the liquid outlet and the liquid outlet channel become connected, and the air outlet hole becomes connected to the lower part of the second cavity. This dual-pipeline liquid extraction device can simultaneously inflate and open the liquid outlet channel by pressing the switch valve core with an external inflation structure, achieving synchronized inflation and liquid extraction with a single operation.

[0008] In some specific embodiments, an inflation hole is provided at the center of the top of the switch valve core, which communicates with the air inlet channel. The elastic reset structure is a spring disposed between the top of the switch valve core and the bottom of the opening. This arrangement enables the switch valve core to reset and seal after inflation.

[0009] In some specific embodiments, the liquid outlet channel is a first region between a recess on the middle circumferential surface of the switch valve core and the middle of the first cavity, and a second region between an axially spaced protrusion on the lower circumferential surface of the switch valve core and the upper part of the second cavity. The first region is connected to the liquid outlet, and the first sealing structure blocks the connection between the first and second regions. When the switch valve core is pressed and undergoes axial displacement, the first and second regions become connected. This configuration enables the liquid outlet channel to be open when the switch valve core is pressed and displaced.

[0010] In some specific embodiments, a second sealing structure is provided between the surface of the switch valve core above the first region and the first cavity. This arrangement prevents liquid from escaping between the upper part of the switch valve core and the first cavity during liquid dispensing.

[0011] In some specific embodiments, the axial guide vane is provided with a toothed structure. This feature prevents the sealing sleeve from sliding or shifting during use.

[0012] In some specific embodiments, the check valve has a hollow interior with an upper cavity and a lower cavity. The upper cavity slides and seals against the bottom of the valve core, while the lower cavity has an inner diameter larger than that of the upper cavity. This sliding check valve design allows air to escape through an vent when the valve core is pressed down and closes when it rebounds, ensuring a reliable seal and no pressure loss.

[0013] In some specific embodiments, a flow-beaming insert is also included. The flow-beaming insert is connected to the end of the flow guide in a sealing fit, and a flow-beaming hole is provided through the interior of the flow-beaming insert. The flow-beaming insert can prevent the wine from flowing back into the flow guide when the bottle is at rest.

[0014] In some specific embodiments, a filter assembly is also included. The filter assembly comprises an annular filter screen and a hollow conduit. One end of the annular filter screen is sealed to the bottom of the sealing sleeve, and the other end is fixed to the head of the hollow conduit when the end of the hollow conduit is sealed to the end of the guide section. This filter assembly allows for the filtration of impurities during liquid extraction, improving the quality of the output liquid.

[0015] According to a second aspect of the present invention, a liquid extraction system is provided, comprising the dual-pipeline liquid extraction device as described above, and further comprising an inflation component and a gas source. The inflation component is connected to the gas source, and the inflation component presses a switch valve core to perform inflation and liquid extraction. This liquid extraction system can achieve synchronous operation of inflation and liquid extraction by connecting the inflation component to the gas source in conjunction with the dual-pipeline liquid extraction device.

[0016] In some specific embodiments, the inflation component is an inflation terminal fixed to the vertical surface, and the inflation terminal is inclinedly provided with an inflation part for pressing and engaging with the inflation port of the switch valve core. This configuration enables one-handed bottle inflation and liquid dispensing operations.

[0017] According to a third aspect of the present invention, an aeration liquid extraction method is provided, utilizing the dual-channel liquid extraction device as described above, comprising:

[0018] S1: Insert the dual-tube liquid extraction device into the liquid bottle to be extracted, tilt the liquid bottle to be extracted, and use the external inflation component and the switch valve core to press the switch valve core to open the air inlet and liquid outlet channels, and perform simultaneous inflation and liquid extraction operations.

[0019] S2: After the liquid is collected, remove the external inflation component and place the bottle upright. Press the switch valve core to expel the excess compressed gas in the bottle to be collected, and at the same time blow out the liquid remaining at the outlet.

[0020] In some specific embodiments, a dispensing step is also included: connecting the dispensing bag to the connector at the liquid outlet, filling the dispensing bag using S1, and after filling, pressing the switch valve core to inject excess compressed gas into the dispensing bag, then removing the connector from the dispensing bag. This operation achieves better storage of the liquid inside the bag, and increases resistance to external forces and bag shape retention.

[0021] Compared with the prior art, the beneficial results of the present invention are as follows:

[0022] The dual-channel liquid extraction device in this application utilizes a resettable switch valve core to simultaneously open the air inlet and liquid outlet channels when the inflation assembly is pressed down, thereby achieving synchronous inflation and liquid extraction. A sliding check valve exposes the air outlet when the switch valve core is pressed down and closes it upon return, ensuring reliable sealing without pressure loss. A toothed guide section structure forms a guide zone between the guide section and the sealing sleeve, facilitating the introduction of the liquid to be extracted into the chamber. Furthermore, the toothed axial guide vanes prevent the sealing sleeve from sliding or shifting during use. Depending on the application scenario, a beam insert or filter assembly can be connected to the guide section to meet the corresponding usage requirements. This dual-channel liquid extraction device is adaptable to different types of inflation terminals (e.g., fixed or handheld inflation terminals), or the inflation structure can be integrated into the liquid extraction body to meet the needs of various usage scenarios. In addition, after the inflation and liquid dispensing operation is completed, some of the compressed gas inside the bottle can be discharged by pressing the switch valve core, which can also be used to discharge the liquid remaining at the outlet and prevent liquid accumulation in the pipeline. In the dispensing application, the dispensing connector is connected to the dispensing bag for filling. The switch valve core can also be pressed to allow excess gas in the bottle to enter the dispensing bag, which makes it easier to squeeze out excess gas when sealing the dispensing bag, making the internal environment of the package more stable and suitable for storage. Attached Figure Description

[0023] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized as they become better understood through reference to the following detailed description. Elements in the drawings are not necessarily to scale. The same reference numerals refer to corresponding similar parts.

[0024] Figure 1 This is a schematic diagram of the structure of a dual-pipeline liquid extraction device according to the first embodiment of the present invention;

[0025] Figure 2 This is a cross-sectional view of a dual-pipeline liquid extraction device according to a first specific embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of a dual-pipeline liquid extraction device according to a second embodiment of the present invention;

[0027] Figure 4 This is a cross-sectional view of a dual-pipeline liquid extraction device according to a second specific embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of a liquid extraction system according to an embodiment of the present invention;

[0029] Figure 6This is a cross-sectional schematic diagram of a liquid collection system according to a specific embodiment of the present invention;

[0030] Figure 7 This is a flowchart of a liquid extraction method according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the packaging process according to a specific embodiment of the present invention;

[0032] The meanings of the numbers in the diagram are as follows: 1-Liquid collection body, 11-Liquid outlet, 2-Switch valve core, 21-Air inlet, 22-Spring, 23-First sealing ring, 24-Second sealing ring, 3-Sealing sleeve, 4-Flow guide, 41-Check valve, 5-Flow connector, 6-Filter assembly, 61-Annular filter screen, 62-Hollow conduit, 63-Positioning plate, 7-Liquid bottle to be collected, 8-Inflation terminal, 9-Dispensing connector, 10-Dispensing bag. Detailed Implementation

[0033] In the following detailed description, reference is made to the accompanying drawings, which form part of the detailed description and are illustrated by specific illustrative embodiments in which the invention may be practiced. In this regard, directional terms such as “top,” “bottom,” “left,” “right,” “up,” “down,” etc., are used with reference to the orientation of the described figures. Because components of the embodiments can be positioned in several different orientations, directional terms are used for illustrative purposes and are by no means limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the invention. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the invention is defined by the appended claims.

[0034] This invention proposes a liquid extraction device. Figure 1 A schematic diagram of the structure of the dual-tube liquid extraction device according to the first embodiment of the present invention is shown, as follows: Figure 1As shown, the dual-pipeline liquid extraction device includes a liquid extraction body 1, a switch valve core 2, a sealing sleeve 3, a flow guide 4, and a flow-concentrating insert 5. The liquid extraction body 1 has an opening at its upper part and a liquid outlet 11 on one side, with a first cavity extending through its interior. The switch valve core 2 is axially displaceable within the first cavity of the liquid extraction body 1 via a reset structure. The upper part of the switch valve core 2 has an air inlet 21 for cooperation with an external inflation assembly, and the interior of the switch valve core 2 has an air inlet channel. The switch valve core 2 is configured such that when pressed and axially displaced, its interior forms a... The liquid outlet channel and the air inlet channel are both open. A sealing sleeve 3 is fitted onto the bottom of the liquid-collecting body 1, with annular sealing protrusions spaced apart on it for insertion into the bottle opening and sealing cooperation. A flow guide 4 is inserted into the sealing sleeve 3 and connected to the bottom of the liquid-collecting body 1. Axial flow guide plates are spaced apart on the circumferential surface of the flow guide 4, so that multiple flow guide zones are formed on the circumferential surfaces of the sealing sleeve and the flow guide when it cooperates with the sealing sleeve 3. A flow-concentrating insert 5 is connected to the bottom of the flow guide 4 to prevent liquid from flowing back into the flow guide 4 when the bottle is stationary. This dual-pipeline liquid-collecting device can achieve synchronous inflation and liquid dispensing through an external inflation component via press-to-inflate coordination. The following structure... Figure 2 The cross-sectional view of the dual-pipeline liquid sampling device provides a detailed explanation of its structural principle:

[0035] In a specific embodiment, the first cavity of the liquid-collecting body 1 is connected to the opening. The upper part of the first cavity has a smaller inner diameter than the lower part, and the upper and lower parts are connected by a conical transition. The liquid outlet 11 passes through the upper cavity of the first cavity. The head of the switch valve core 2 is provided with an upper cover structure that cooperates with the opening. The reset structure is a spring 22 provided at the bottom of the upper cover structure and the opening. The middle part of the switch valve core 2 cooperates with the upper part of the first cavity. The middle part is provided with an annular recess structure, and a first sealing structure 23 and a second sealing structure 24 are respectively provided at the upper and lower ends of the annular recess structure. Under the action of the spring 22, the switch valve core 2 is pressed upward so that the second sealing structure 24 is sealed with the conical surfaces of the upper and lower parts of the first cavity to block the conduction between the lower part of the first cavity and the annular recess structure and the liquid outlet (i.e., block the liquid outlet channel). When the switch valve core 2 is pressed down, the lower part of the first cavity and the annular recess structure and the liquid outlet are connected (i.e., the liquid outlet channel is connected).

[0036] In a specific embodiment, an air inlet 21 is provided in the middle of the upper cover structure of the switch valve core 2. The air inlet 21 is connected to the internal air intake channel of the switch valve core 2. The external inflation structure can achieve inflation by cooperating with the air inlet. A sealing element is provided inside the air inlet to ensure a sealed inflation process. At the bottom of the internal air intake channel of the switch valve core 2, a radial air outlet hole is provided that connects to the air intake channel.

[0037] In a specific embodiment, a second cavity is provided through the interior of the flow guide 4. The flow guide 4 is sealed and connected to the lower part of the liquid receiving body 1. A connecting hole for communicating with the second cavity is opened in the interval area of ​​the axial flow guide vane on the upper part of the flow guide 4, so as to introduce the liquid from the external flow guide area into the second cavity and perform the liquid discharge action through the above-mentioned liquid discharge channel. A check valve 41 is sealed in the second cavity below the connection hole. The check valve 41 is hollow inside and has an upper cavity for sliding and sealing with the lower end of the switch valve core 2 and a lower cavity larger than the inner diameter of the upper cavity. When the switch valve core 2 is in the normal reset state (i.e., the liquid outlet channel is blocked), the lower end of the switch valve core 2 is sealed with the upper cavity of the check valve 41, the radial air outlet is closed by the check valve, and the inflation channel is blocked. When the switch valve core 2 is pressed down (i.e., the liquid outlet channel is open), the lower end of the switch valve core 2 extends from the upper cavity of the check valve 41 into the lower cavity. At this time, the radial air outlet is connected to the lower cavity of the check valve, the air inlet channel is open, and inflation can be performed.

[0038] In a specific embodiment, the axially spaced guide vanes on the circumferential surface of the flow guide 4 are provided with toothed structures to prevent the sealing sleeve 3 from sliding or shifting when it is inserted into the bottle mouth of the liquid being collected. The lower part of the flow guide 4 is sealed and connected to the flow-beam insert 5 through a threaded structure. The flow-beam insert 5 has a flow-beam hole through its middle part, which can prevent the liquid in the bottle from flowing back into the cavity of the flow guide 4 when it is standing, thus avoiding increasing the difficulty of cleaning the stopper. The flow-beam hole of a certain length at the end makes it difficult for external liquid to enter the inner cavity under the action of water tension and internal sealed space air pressure. Another function of the flow-beam insert is to act as a threaded plug, which protects the connecting threads when changing filter elements.

[0039] Figure 3 A schematic diagram of the structure of the dual-tube liquid extraction device according to a second embodiment of the present invention is shown, as follows: Figure 3 As shown, for fermented wine, natural wine or aged wine with a lot of lees in the bottle, and the case of broken cork after opening the bottle, which results in sawdust in the liquid in the bottle, a filter screen assembly 6 can be added. The filter screen assembly 6 can replace the above-mentioned flow-guiding plug 5 and is connected to the bottom of the flow guide 4 by a thread. Figure 4 A cross-sectional view of a dual-channel liquid extraction device according to a second specific embodiment of the present invention is shown, as follows. Figure 4As shown, the filter assembly 6 includes an annular filter 61 and a hollow conduit 62. The annular filter 61 has a porous tubular structure. The bottom of the sealing sleeve 3 has a sealing protrusion. One end of the annular filter 61 is fitted onto the sealing sleeve 3 in conjunction with the sealing protrusion. One end of the hollow conduit 62 has an end cap structure, and the other end is connected to the flow guide 4 via a thread. Radial positioning plates are spaced apart on the surface of the hollow conduit 62. The radial positioning plates and the interior of the annular filter 61 are tightened with mating threads to achieve a sealing fit on the top bevel. At the same time, one end of the end cap structure clamps the other end of the annular filter 61 to achieve air guidance and liquid filtration.

[0040] Continue to refer to Figure 5 , Figure 5 A schematic diagram of a liquid collection system according to an embodiment of the present invention is shown, as follows: Figure 5 As shown, the liquid extraction system includes the aforementioned dual-channel liquid extraction device. This device is inserted into the liquid bottle 7 to be extracted. It also includes an inflation terminal 8 with an inflation section. When the inflation terminal 8 is fixed to a wall or other vertical surface, the inflation section is tilted upwards. The inflation section is equipped with a press-to-release valve and an overpressure protection valve, and is connected to an external large-capacity gas cylinder via a gas tube seat. The inflation section also has a guide sleeve for guiding the insertion of the dual-channel liquid extraction device, and it has a notch for positioning and engaging with the liquid outlet 11. The liquid bottle 7, with the dual-channel liquid extraction device inserted, is inserted into the guide sleeve of the inflation section. By pressing the release valve, which engages with the switch valve core of the dual-channel liquid extraction device, both the air inlet and outlet channels are opened simultaneously, enabling simultaneous inflation and liquid extraction. For specific details, please refer to [reference needed]. Figure 6 The diagram shown is a cross-sectional view of a liquid collection system according to a specific embodiment of the present invention, as follows: Figure 6 As shown, when the bottle 7 with the dual-pipe liquid extraction device is engaged with the inflation head of the inflation terminal 8, pressing the bottle body causes the valve core of the outlet valve to engage with the air inlet 21 of the switch valve core 2, and the switch valve core 2 is pressed downwards, so that the lower part of the first cavity of the liquid extraction body and the annular recessed structure and liquid outlet 11 on the switch valve core are connected (i.e., the liquid outlet channel is connected). At the same time, the lower part of the switch valve core 2 extends from the upper cavity of the check valve 41 into the lower cavity. At this time, the radial air outlet is connected with the lower cavity of the check valve, and the air inlet channel is connected, allowing inflation to be performed. External compressed gas enters the bottle through the air inlet channel, simultaneously forcing the liquid in the bottle out from the liquid outlet channel, completing the synchronous operation of inflation and liquid extraction. In this embodiment, Figures 1-2 Taking the dual-tube liquid sampling device of the beam insertion module as an example, similar devices can also be used in applications requiring filtration. Figures 3-4 The dual-tube liquid extraction device with a filter component can be used for aeration and liquid extraction, and can also achieve aeration and liquid extraction simultaneously by pressing.

[0041] Continue to refer to Figure 7, Figure 7 A flowchart of a liquid extraction method according to an embodiment of the present invention is shown. This liquid extraction method utilizes the above-described dual-tube liquid extraction device and specifically includes the following steps:

[0042] S1: Insert the dual-tube liquid extraction device into the liquid bottle to be extracted, tilt the liquid bottle to be extracted, and use the external inflation component and the switch valve core to press the switch valve core to open the air inlet and liquid outlet channels, and perform simultaneous inflation and liquid extraction operations.

[0043] S2: After the liquid is collected, remove the external inflation component and place the bottle upright. Press the switch valve core to expel the excess compressed gas in the bottle to be collected, and at the same time blow out the liquid remaining at the outlet.

[0044] In some specific embodiments, a dispensing step is also included: the dispensing bag is connected to the connector set at the liquid outlet, the dispensing bag is filled using S1, and after filling, the excess compressed gas is injected into the dispensing bag by pressing the switch valve core. The connector is removed from the dispensing bag. When sealing the dispensing bag, some excess gas can be squeezed out as needed. This can increase the resistance of the dispensing bag to external forces and also have a shaping effect. Figure 8 A schematic diagram of a specific embodiment of the present invention is shown. As shown in Figure 8, a dispensing connector 9 is provided on the liquid outlet 11 of the dual-pipeline liquid dispensing device. The dispensing connector 9 is sealed to the surface of the liquid outlet. Specifically, a sealing gasket is placed inside the dispensing connector 9 to seal the opening of the sealed bag. The dispensing connector 9 can be used with the filling port of the dispensing bag 10. In dispensing applications, simply connect the dispensing bag 10 to the dispensing connector 9 to perform the liquid dispensing operation by the above-described liquid dispensing method. After liquid dispensing, the excess compressed gas in the bottle can be injected into the dispensing bag by pressing the switch valve core of the dual-pipeline liquid dispensing device. This facilitates the expulsion of excess gas as needed when sealing the dispensing bag 10, ensuring the stability of the internal environment of the sealed bag. The compressed gas in the above embodiment can be an inert gas that does not react with the liquid in the bottle, such as argon, carbon dioxide, nitrogen, or a mixture thereof.

[0045] The dual-channel liquid dispensing device in this application achieves simultaneous opening of the air inlet and liquid outlet channels when the inflation component is pressed down, through a resettable switch valve core and its cooperation with the internal structure of the liquid dispensing body. This allows for synchronous inflation and liquid dispensing. Depending on the application scenario, a flow guide or a flow filter component can be selected to connect to the flow guide. This dual-channel liquid dispensing device is adaptable to different types of inflation terminals (such as the aforementioned fixed inflation terminal or handheld inflation terminal), or the inflation structure can be integrated into the liquid dispensing body to meet the needs of different application scenarios. Furthermore, after completing the inflation and liquid dispensing operation, pressing the switch valve core can release some of the compressed gas inside the bottle and also discharge any remaining liquid at the outlet, preventing liquid accumulation in the pipeline. In repackaging applications, the device connects to a repackaging bag via a repackaging connector for filling. Pressing the switch valve core can also allow excess gas in the bottle to enter the repackaging bag, facilitating the appropriate squeezing out of excess gas during bag sealing, resulting in a more stable internal environment suitable for storage.

[0046] It is evident that those skilled in the art can make various modifications and alterations to the embodiments of the present invention without departing from the spirit and scope of the invention. In this way, the invention is also intended to cover such modifications and alterations if they fall within the scope of the claims and their equivalents. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are described in mutually different dependent claims does not indicate that a combination of these measures cannot be used for profit. Any reference numerals in the claims should not be considered as limiting the scope.

Claims

1. A dual-pipeline liquid extraction device, characterized in that, Includes the liquid-collecting body, the switching valve core, the sealing sleeve, and the flow guide. The sealing sleeve is fitted onto the lower part of the liquid-collecting body for sealing with the bottle mouth of the liquid-collecting bottle. The upper part of the liquid-collecting body is provided with an opening, and one side of the liquid-collecting body is provided with a liquid outlet. The interior of the liquid-collecting body is provided with a first cavity for accommodating the switch valve core, and the liquid outlet is connected to the middle part of the first cavity. The flow guide is connected to the lower part of the liquid collection body and inserted into the sealing sleeve. The circumferential surface of the flow guide is provided with axial flow guide vanes at intervals to form multiple flow guide areas on the circumferential surface of the sealing sleeve and the flow guide. The flow guide is provided with a second cavity inside, and the upper part of the flow guide is provided with a connecting hole that connects the flow guide area and the second cavity. A check valve is sealed in the middle of the second cavity. The lower part of the switch valve core passes through the first cavity and cooperates with the check valve inside the flow guide. The switch valve core has an air inlet channel inside and an air outlet hole that connects to the air inlet channel is radially penetrating the lower part of the switch valve core. The middle circumferential surface of the switch valve core is provided with a first sealing structure and a liquid outlet channel. The top of the switch valve core is provided in the opening mouth through an elastic reset structure, so that the first sealing structure blocks the liquid outlet channel and the air outlet hole is closed by the check valve. When the switch valve core is pressed and undergoes axial displacement, the liquid outlet is connected to the liquid outlet channel and the air outlet hole is connected to the lower part of the second cavity. The liquid outlet channel is a first region between the recess on the middle circumferential surface of the switch valve core and the middle of the first cavity, and a second region between the axial protrusion on the lower circumferential surface of the switch valve core and the upper part of the second cavity. The first region is connected to the liquid outlet. The first sealing structure blocks the connection between the first region and the second region. When the switch valve core is pressed and undergoes axial displacement, the first region and the second region are connected. The check valve has a hollow interior with an upper cavity and a lower cavity. The upper cavity is slidably sealed to the bottom of the switch valve core, and the lower cavity has an inner diameter larger than that of the upper cavity.

2. The dual-pipeline liquid extraction device according to claim 1, characterized in that, An air inlet is provided at the center of the top of the switch valve core, and the air inlet is connected to the air intake channel. The elastic reset structure is a spring disposed between the top of the switch valve core and the bottom of the opening.

3. The dual-pipeline liquid extraction device according to claim 1, characterized in that, A second sealing structure is provided between the surface of the switch valve core above the first region and the first cavity.

4. The dual-pipeline liquid extraction device according to claim 1, characterized in that, The axial guide vane is provided with a toothed structure.

5. The dual-pipeline liquid extraction device according to claim 1, characterized in that, It also includes a beam insert, which is connected to the end of the guide section in a sealed fit, and the beam insert has a beam hole through it.

6. The dual-pipeline liquid extraction device according to claim 1, characterized in that, It also includes a filter assembly, which includes an annular filter screen and a hollow conduit. One end of the annular filter screen is sealed to the bottom of the sealing sleeve, and the other end is fixed to the head of the hollow conduit when the end of the hollow conduit is sealed to the end of the guide portion.

7. A liquid extraction system, comprising the dual-channel liquid extraction device as described in any one of claims 1-6, characterized in that, It also includes an inflation component and an air source, the inflation component being connected to the air source, and the inflation component presses the switch valve core to inflate and extract liquid.

8. A liquid extraction system according to claim 7, characterized in that, The inflation component is an inflation terminal fixed to the vertical surface, and the inflation terminal is provided with an inflation part that is inclined to press and cooperate with the inflation hole of the switch valve core.

9. A method for aeration-based liquid extraction, utilizing the dual-channel liquid extraction device as described in any one of claims 1-6, characterized in that, include: S1: Insert the dual-tube liquid extraction device into the liquid bottle to be extracted, tilt the liquid bottle to be extracted, and use the external inflation component to cooperate with the switch valve core to press the switch valve core to open the air inlet and liquid outlet channels, and perform simultaneous inflation and liquid extraction operations. S2: After the liquid is collected, remove the external inflation component and place the bottle upright. Press the switch valve core to discharge the excess compressed gas in the bottle to be collected, and at the same time blow out the liquid remaining at the outlet.

10. The aeration liquid extraction method according to claim 9, characterized in that, It also includes a dispensing step: connecting the dispensing bag body to the connector provided at the liquid outlet, filling the dispensing bag body using S1, and after filling, pressing the switch valve core to inject excess compressed gas into the dispensing bag body, and removing the connector from the dispensing bag body.

Images