Dual-pipeline liquid extraction device, liquid extraction system, and liquid extraction method

Abstract

A dual-pipeline liquid extraction device, comprising a liquid extraction body (1), a switch valve core (2), and a flow guide portion (4). A sealing sleeve (3) is sleeved on the lower part of the liquid extraction body (1); a liquid outlet (11) is formed in one side of the liquid extraction body (1); a first cavity is formed in the liquid extraction body (1) and passes through the liquid extraction body (1); the liquid outlet (11) is communicated with the middle of the first cavity; the flow guide portion (4) is connected to the lower part of the liquid extraction body (1), and a plurality of flow guide areas are formed between the flow guide portion (4) and the sealing sleeve (3); a second cavity is formed in the flow guide portion (4), and a connecting hole communicated with the flow guide areas and the second cavity is formed in the upper part of the flow guide portion (4); a check valve (41) is arranged in the middle of the second cavity; a gas inlet channel is formed in the switch valve core (2) and a radial gas outlet hole passes through the bottom of the switch valve core (2); a first sealing structure and a liquid outlet channel are arranged in the middle of the switch valve core (2), and the top of the switch valve core (2) is arranged in an opening cavity in the upper part of the liquid extraction body (1) by means of an elastic reset structure, so that the first sealing structure blocks the liquid outlet channel and the gas outlet hole is closed by the check valve (41); and when the switch valve core (2) is pressed to generate axial displacement, the liquid outlet channel is switched on, and closing of the gas outlet hole is released. According to the structure, the valve core can be pressed by means of an external inflation structure to implement inflation and liquid extraction operations at the same time.

Description

A dual-pipeline liquid collection device, liquid collection system, and liquid collection method

[0001] Related applications

[0002] This application claims priority to the Chinese patent application "A dual-pipeline liquid extraction device, liquid extraction system and liquid extraction method" with current patent application number 2023108659482 filed on July 14, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention belongs to the technical field of gas-filled liquid extraction, and particularly relates to a dual-pipeline liquid extraction device, a liquid extraction system and a liquid extraction method. Background Art

[0004] The current existing technical solution for gas-filled liquid extraction can replace the liquid in the bottle by injecting gas. This type of liquid extraction device generally includes a single-channel liquid extraction device and a dual-channel liquid extraction device. The single-channel liquid extraction device shares the same liquid extraction and gas-filled channels, and needs to be inflated before the liquid extraction operation can be performed. In addition, the air intake pressure requirement is relatively high, which may cause the risk of wasting gas or exploding the bottle. The dual-channel liquid extraction device has separate liquid extraction and gas-filled channels, but the structure of the existing dual-channel liquid extraction device is relatively complex, and it is necessary to manually switch and adjust the connectivity of the internal channels in advance when using it, which affects the consumer experience to a certain extent.

[0005] Public content

[0006] In order to solve the above-mentioned problems existing in the prior art, the present application provides a dual-pipeline liquid collection device, a liquid collection system and a liquid collection method to solve the above-mentioned technical defects.

[0007] According to a first aspect of the present invention, a dual-pipeline liquid extraction device is provided, comprising a liquid extraction body, a switch valve core, a sealing sleeve and a flow guide portion.

[0008] The sealing sleeve is mounted on the lower portion of the liquid dispensing body and is used to seal with the bottle mouth of the liquid dispensing bottle. The upper portion of the liquid dispensing body is provided with an opening, and one side of the liquid dispensing body is provided with a liquid outlet. The interior of the liquid dispensing body is provided with a first cavity for accommodating the switch valve core, and the liquid outlet is connected to the middle portion of the first cavity.

[0009] The guide portion is connected to the lower part of the liquid extraction body and inserted into the sealing sleeve. The circumferential surface of the guide portion is provided with axial guide plates at intervals in an array to form multiple guide areas on the circumferential surface of the sealing sleeve and the guide portion. A second cavity is provided inside the guide portion, and a connecting hole connecting the guide area and the second cavity is opened at the upper part of the guide portion. A check valve is sealed in the middle of the second cavity.

[0010] The lower portion of the switch valve core passes through the first cavity and cooperates with the check valve inside the guide portion. An air inlet channel is provided inside the switch valve core, and an air outlet hole connected to the air inlet channel is radially penetrated through the lower portion of the switch valve core. 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 disposed 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 axially displaced, the liquid outlet communicates with the liquid outlet channel and the air outlet communicates with the lower portion of the second cavity. This dual-pipeline liquid extraction device can simultaneously inflate the switch valve core by pressing the external inflation structure to open the liquid outlet channel, achieving simultaneous inflation and liquid extraction in a single operation.

[0011] In some specific embodiments, an inflation hole is provided at the center of the top of the switch valve core, communicating with the air inlet passage. The elastic reset structure is a spring disposed between the top of the switch valve core and the bottom of the opening. This arrangement allows the switch valve core to be reset and sealed after inflation.

[0012] In some specific embodiments, the liquid outlet passage comprises a first region between a recess provided on the central circumferential surface of the switching valve core and the central portion of the first cavity, and a second region between axial projections provided spaced apart on the lower circumferential surface of the switching valve core and the upper portion of the second cavity. The first region communicates with the liquid outlet, and a first sealing structure blocks communication between the first and second regions. When the switching valve core is pressed and axially displaced, communication between the first and second regions occurs. This arrangement ensures that the liquid outlet passage remains open when the switching valve core is pressed and displaced.

[0013] 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, thereby preventing liquid from escaping from between the upper portion of the switch valve core and the first cavity during liquid extraction.

[0014] In some specific embodiments, the axial guide plate is provided with a toothed structure, which can prevent the sealing sleeve from sliding during use.

[0015] 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 with the bottom of the switch valve core, while the lower cavity has a larger inner diameter than the upper cavity. This sliding check valve arrangement allows the vent to release air when the switch valve core is depressed, and closes when the switch valve core rebounds, ensuring a reliable seal and preventing pressure loss.

[0016] In some specific embodiments, a flow beam plug is further included, which is sealably connected to the end of the guide portion and has a flow beam hole extending therethrough. The flow beam plug can prevent the wine from flowing back into the guide portion when the bottle is at rest.

[0017] In some specific embodiments, a filter assembly is further included. The filter assembly comprises an annular filter screen and a hollow conduit. One end of the annular filter screen seals with 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 with the end of the guide portion. This filter assembly can filter impurities during the liquid extraction process, thereby improving the quality of the liquid output.

[0018] According to a second aspect of the present invention, a liquid collection system is provided, comprising the dual-pipeline liquid collection device described above, and further comprising an inflation assembly and an air source, wherein the inflation assembly is connected to the air source and presses a switch valve core to perform inflation and liquid collection. The liquid collection system can achieve simultaneous inflation and liquid collection by connecting the inflation assembly to the air source and cooperating with the dual-pipeline liquid collection device.

[0019] In some specific embodiments, the inflation component is an inflation terminal fixed to the vertical surface, and an inflation portion is arranged obliquely on the inflation terminal for press-fitting with the inflation hole of the switch valve core. With this arrangement, the bottle can be pressed to inflate and remove liquid with one hand.

[0020] According to a third aspect of the present invention, a method for obtaining liquid by aeration is provided, using the above-mentioned dual-pipeline liquid extraction device, comprising:

[0021] S1: Insert the dual-pipe liquid extraction device into the bottle to be extracted, tilt the 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 for simultaneous inflation and liquid extraction operations;

[0022] S2: After the liquid is drawn, 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 drawn, and blow out the liquid remaining at the liquid outlet.

[0023] In some specific embodiments, a subpackaging step is further included: connecting the liquid outlet to the subpackaging bag through a connector provided thereon, filling the subpackaging bag using S1, and after filling, pressing the switch valve core to inject excess compressed gas into the subpackaging bag, and then removing the connector from the subpackaging bag. This operation can achieve better storage of the liquid in the bag, increase resistance to external forces, and enhance the bag's shape.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The dual-pipeline liquid extraction device in the present application can realize the simultaneous opening of the air inlet and liquid outlet channels when the inflation component is pressed down through a resettable switch valve core, thereby achieving the synchronous completion of inflation and liquid discharge. The sliding check valve can be used to expose the air outlet when the switch valve core is pressed down, and the air outlet is closed when it is reset and rebounded, with reliable sealing and no pressure loss. By using a toothed guide structure, a guide area can be formed between the guide and the sealing sleeve, which is convenient for introducing the liquid to be taken into the chamber, and the toothed axial guide plate can also prevent the sealing sleeve from sliding and shifting during use. It is also possible to select a beam plug-in or a filter component to connect the guide according to different application scenarios to meet the corresponding usage scenarios. The dual-pipeline liquid extraction device can be adapted to different forms of inflation terminals (such as fixed or handheld inflation terminals), or the inflation structure can be integrated into the liquid extraction body to meet the needs of different usage scenarios. In addition, after completing the inflation and liquid extraction operation, you can discharge part of the compressed gas in the bottle by pressing the switch valve core, and you can also discharge the liquid remaining in the liquid outlet to prevent liquid accumulation in the pipeline; when applying subpackaging, you can connect the subpackaging joint to the subpackaging bag for filling, or you can press the switch valve core to allow excess gas in the bottle to enter the subpackaging bag, which is convenient for properly squeezing out excess gas when sealing the subpackaging bag, making the internal environment of the package more stable and suitable for storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many of the expected advantages of the embodiments will be readily apparent as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale with respect to each other. Like reference numerals designate corresponding similar parts.

[0027] FIG1 is a schematic structural diagram of a dual-pipeline liquid extraction device according to a first embodiment of the present invention;

[0028] 2a-2b are cross-sectional views of a dual-pipeline liquid extraction device according to a first specific embodiment of the present invention;

[0029] FIG3 is a schematic structural diagram of a dual-pipeline liquid extraction device according to a second embodiment of the present invention;

[0030] 4a-4b are cross-sectional views of a dual-pipeline liquid extraction device according to a second specific embodiment of the present invention;

[0031] FIG5 is a schematic structural diagram of a liquid extraction system according to an embodiment of the present invention;

[0032] FIG6 is a cross-sectional schematic diagram of a liquid extraction system according to a specific embodiment of the present invention;

[0033] FIG7 is a flow chart of a liquid extraction method according to one embodiment of the present invention;

[0034] FIG8 is a schematic diagram of subpackaging according to a specific embodiment of the present invention;

[0035] The meaning of the numbers in the figure: 1-liquid collection body, 11-liquid outlet, 2-switching valve core, 21-air inlet, 22-spring, 23-first sealing ring, 24-second sealing ring, 3-sealing sleeve, 4-flow guide part, 41-check valve, 5-beam plug-in, 6-filter assembly, 61-annular filter screen, 62-hollow catheter, 63-positioning piece, 7-liquid bottle to be collected, 8-inflating terminal, 9-packaging connector, 10-packaging bag. DETAILED DESCRIPTION

[0036] In the following detailed description, reference is made to the accompanying drawings, which form a part of the detailed description and are illustrated by illustrative specific embodiments in which the present invention may be practiced. To this end, directional terms, such as "top," "bottom," "left," "right," "up," "down," etc., are used with reference to the orientation of the figures being described. Because the components of the embodiments may be positioned in several different orientations, directional terms are used for illustrative purposes and are in no way limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present invention. Therefore, the following detailed description should not be adopted in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0037] The present invention proposes a liquid taking device. Figure 1 shows a structural schematic diagram of a dual-pipeline liquid taking device of the first embodiment of the present invention. As shown in Figure 1, the dual-pipeline liquid taking device includes a liquid taking body 1, a switch valve core 2, a sealing sleeve 3, a guide part 4 and a beam plug-in 5, wherein the upper part of the liquid taking body 1 is provided with an open cavity, a liquid outlet 11 is provided on one side, and a first cavity is provided through the inside; the switch valve core 2 can be axially displaced in the first cavity inside the liquid taking body 1 through a reset structure, and the upper part of the switch valve core 2 is provided with an air inlet 21 for cooperating with an external inflation component. In a preferred embodiment, the air inlet 21 can be set to a self-sealing structure so that the air inlet can be immediately closed after each inflation and liquid taking, so that the inert gas inside the tube cavity of the switch valve core 2 can be retained, avoiding the risk of air mixing during inflation and liquid taking again. An air inlet channel is provided inside the switch valve core 2. The switch valve core 2 is configured so that when pressed and displaced axially, its interior communicates with the liquid outlet channel formed by the first cavity and the air inlet channel is also in a conductive state. The sealing sleeve 3 is sleeved on the bottom of the liquid extraction body 1. Annular sealing protrusions are provided on the sealing sleeve at intervals for insertion into and sealingly engaging with the opening of the bottle to be extracted. The guide portion 4 is inserted into the sealing sleeve 3 and connected to the bottom of the liquid extraction body 1. Axial guide plates are provided on the circumferential surface of the guide portion 4 at intervals so that when it cooperates with the sealing sleeve 3, multiple guide areas are formed on the circumferential surfaces of the sealing sleeve and the guide portion. The beam plug-in 5 is connected to the bottom of the guide portion 4 to prevent the liquid in the bottle from flowing back into the interior of the guide portion 4 when the bottle to be extracted is at rest. The dual-channel liquid extraction device can achieve synchronous inflation and liquid discharge through the external inflation assembly by pressing and inflating. The cross-sectional views of the dual-channel liquid extraction device in the following structural figures 2a-2b provide a detailed description of the structural principle of the dual-channel liquid extraction device:

[0038] In a specific embodiment, as shown in Figure 2a, the first cavity of the liquid extraction body 1 is connected to the open cavity, the upper part of the first cavity has a size smaller than the inner diameter of the lower part, and the upper and lower parts are connected by a conical surface transition. The liquid outlet 11 passes through the upper cavity of the first cavity, and the head of the switch valve core 2 is provided with an upper cover structure that cooperates with the open cavity. The reset structure is a spring 22 arranged on the upper cover structure and the bottom of the open cavity. The middle part of the switch valve core 2 cooperates with the upper part of the first cavity, and an annular recessed structure is provided in the middle part, and a first sealing structure 23 and a second sealing structure 24 are respectively provided at the upper and lower ends of the annular recessed 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, so as to block the conduction between the lower part of the first cavity and the annular recessed structure and the liquid outlet (that is, block the liquid outlet channel). When the switch valve core 2 is pressed downward, the lower part of the first cavity and the annular recessed structure and the liquid outlet are connected (that is, the liquid outlet channel is connected).

[0039] In this specific embodiment, an air inlet 21 is provided in the middle of the upper cover structure of the switch valve core 2. This inlet 21 communicates with the internal air inlet passage of the switch valve core 2. The external inflation structure cooperates with the inlet to achieve inflation. A seal is provided within the inlet to ensure a tight seal during inflation. A radial air outlet hole, connecting to the air inlet passage, is radially penetrated through the bottom of the internal air inlet passage of the switch valve core 2 at the lower portion of the switch valve core 2.

[0040] In a specific embodiment, a second cavity is provided inside the guide part 4, and the guide part 4 is sealed and connected to the lower part of the liquid collection body 1. The upper part of the guide part 4 is provided with a connecting hole connected to the second cavity in the spacing area of ​​the axial guide plate, so as to introduce the liquid in the external guide area into the second cavity and perform the liquid discharge action through the above-mentioned liquid outlet channel. A check valve 41 is sealed in the second cavity below the connecting 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 above-mentioned liquid outlet channel blocking state), 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 downward (i.e. when the liquid outlet channel is connected), the lower end of the switch valve core 2 extends from the upper cavity of the check valve 41 to 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, so the inflation action can be performed.

[0041] In a specific embodiment, a toothed structure is provided on the axial guide plates arranged at intervals on the circumferential surface of the guide portion 4, which is used to prevent the sealing sleeve 3 from sliding and shifting when it is inserted into the sealing sleeve 3, and at the same time, it also strengthens the grip of the component surface, making it easier to assemble and disassemble, and convenient for daily cleaning and replacement of each component. The lower part of the guide portion 4 is sealed and connected to the beam plug-in 5 through a threaded structure, and a beam hole is provided through the middle part of the beam plug-in 5, which can prevent the liquid in the bottle from flowing back into the cavity of the guide portion 4 when it is stationary, thereby avoiding increasing the difficulty of cleaning the stopper. The beam hole of a certain length is provided at the end, and under the action of the water tension and the air pressure of the internal sealed space, it is difficult for external liquid to enter the inner cavity. Another function of the beam plug-in is to serve as a threaded plug, which protects the connecting thread when converting the filter element.

[0042] In another embodiment, as shown in FIG2b , the beam plug is integrated with the guide portion 4 , that is, a beam hole structure is provided at the lower portion of the guide portion 4 , so that the overall integration is higher, and the effect of preventing the liquid in the bottle from flowing back into the cavity of the guide portion 4 when standing still can also be achieved in the present application.

[0043] Figure 3 shows a structural schematic diagram of a dual-pipeline liquid extraction device according to a second embodiment of the present invention. As shown in Figure 3, for fermented wine in the bottle, natural wine with a lot of lees or old wine, and the situation where the cork is broken when the bottle is opened, resulting in the presence of sawdust in the liquid in the bottle, a filter assembly 6 can be added, and the filter assembly 6 can be used to replace the above-mentioned beam plug-in 5, and is connected to the bottom of the guide part 4 through a threaded connection. Figures 4a-4b show cross-sectional views of a dual-pipeline liquid extraction device according to a second specific embodiment of the present invention. In one embodiment, as shown in Figure 4a, the filter assembly 6 includes an annular filter 61 and a hollow conduit 62. The annular filter 61 is a porous tubular structure. The bottom of the sealing sleeve 3 has a sealing protrusion. One end of the annular filter 61 is cooperated with the sealing protrusion and is arranged on the sealing sleeve 3. One end of the hollow conduit 62 has an end cover structure, and the other end is connected to the guide part 4 through a thread. Radial positioning pieces 63 are arranged at intervals on the surface of the hollow conduit 62. The radial positioning pieces 63 and the inside of the annular filter 61 are tightened by docking threads to achieve a sealing fit on the top inclined surface. At the same time, one end of the end cover structure clamps the other end of the annular filter 61 to achieve air guidance and liquid filtration. In another embodiment, as shown in Figure 4b, the filter tube can be directly used to replace the diversion part. In this embodiment, the filter component 6 includes an annular filter screen 61' and a hollow conduit 62'. One end of the annular filter screen 61' is sealed with the sealing sleeve 3. One end of the hollow conduit 72 has an end face larger than the outer diameter of the annular filter screen, and the other end is connected to the lower part of the liquid extraction body through a thread. The surface of the hollow conduit 62' is spaced apart with radial positioning pieces 63'. The radial positioning pieces 63' cooperate with the inside of the annular filter screen 61' and have a diversion function. The sealing fit of the top inclined surface is achieved by tightening the docking thread. The end section of the hollow conduit 62' is provided with a knob portion, which is a raised structure, which is convenient for the user to manually install or remove the filter component 6.

[0044] Continuing with FIG5 , FIG5 shows a schematic structural diagram of a liquid collection system according to an embodiment of the present invention. As shown in FIG5 , the liquid collection system includes the aforementioned dual-line liquid collection device, which is inserted into a bottle 7 to be collected. It also includes a gas filling terminal 8 having a gas filling portion disposed thereon. When the gas filling terminal 8 is fixed to a vertical surface such as a wall, the gas filling portion is tilted upward. The gas filling portion is provided with a push-on air outlet valve and an overpressure protection valve structure, and is connected to an external large-capacity gas cylinder via a gas pipe seat. The gas filling portion is also provided with a guide sleeve for guiding the insertion of the dual-line liquid collection device and is provided with a notch for positioning with the liquid outlet 11. The bottle 7 to be collected, with the dual-line liquid collection device inserted therein, is inserted into the guide sleeve of the gas filling portion. By pressing the gas outlet valve, which is pressed against the on-off valve core of the dual-line liquid collection device, the air inlet and liquid outlet channels are simultaneously opened, thereby achieving simultaneous gas filling and liquid collection. For a more detailed description, see FIG6 , which illustrates a cross-sectional schematic diagram of a liquid extraction system according to a specific embodiment of the present invention. As shown in FIG6 , when a liquid extraction bottle 7, equipped with a dual-line liquid extraction device, is mated with the inflator head of the inflation terminal 8, the bottle body is pressed to engage the valve core of the outlet valve with the inlet port 21 of the switch valve core 2. The switch valve core 2 is then pushed downward, causing the lower portion of the first cavity of the liquid extraction body, the annular recessed structure on the switch valve core, and the liquid outlet port 11 to communicate (i.e., the liquid outlet passage is connected). Simultaneously, the lower portion of the switch valve core 2 extends from the upper cavity of the check valve 41 into the lower cavity. At this point, the radial outlet ports communicate with the lower cavity of the check valve, and the inlet passage is open, allowing inflation to proceed. Externally compressed gas enters the bottle through the inlet passage, simultaneously forcing the liquid in the bottle out of the liquid outlet passage, completing the simultaneous inflation and liquid extraction operations. In this embodiment, the dual-pipe liquid extraction device of the beam plug-in in Figures 1-2 is used as an example. In application scenarios where filtration is required, a dual-pipe liquid extraction device with a filter component as shown in Figures 3-4 can also be used to perform inflation and liquid extraction operations, and the inflation and liquid extraction operations can also be achieved simultaneously through a pressing operation.

[0045] Continuing to refer to FIG. 7 , FIG. 7 shows a flow chart of a liquid collection method according to an embodiment of the present invention. The liquid collection method utilizes the above-mentioned dual-pipeline liquid collection device and specifically includes the following steps:

[0046] S1: Insert the dual-pipe liquid extraction device into the bottle to be extracted, tilt the 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 for simultaneous inflation and liquid extraction operations;

[0047] S2: After the liquid is drawn, 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 drawn, and blow out the liquid remaining at the liquid outlet.

[0048] In some specific embodiments, a subpackaging step is also included: connecting the subpackaging bag body through a joint provided at the liquid outlet, filling the subpackaging bag body with S1, pressing the switch valve core to inject excess compressed gas into the subpackaging bag body after the filling is completed, removing the joint and connecting it to the subpackaging bag body, and squeezing out some excess gas as needed when packaging the subpackaging bag body. On the one hand, it can increase the ability of the subpackaging bag body to resist external forces, and on the other hand, it can also have a shaping effect. Figure 8 shows a schematic diagram of subpackaging according to a specific embodiment of the present invention. As shown in Figure 8, a subpackaging joint 9 is provided on the liquid outlet 11 of the dual-pipeline liquid extraction device, and the subpackaging joint 9 is sealed with the surface of the liquid outlet. Specifically, a sealing gasket is placed in the subpackaging joint 9 to seal the packaging bag opening. The subpackaging connector 9 can be matched with the filling port of the subpackaging bag 10. When the subpackaging is used, it is only necessary to connect the subpackaging bag 10 to the subpackaging connector 9, and the above-mentioned liquid collection method can be used to perform the gas filling and liquid collection operation. After the liquid collection is completed, the switch valve core of the double-pipe liquid collection device can be pressed to realize the filling of excess compressed gas in the bottle into the subpackaging bag, thereby facilitating the squeezing out of excess gas as needed when packaging the subpackaging bag 10 to ensure the stability of the internal packaging environment. The compressed gas in the above-mentioned 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.

[0049] The dual-circuit liquid extraction device in the present application realizes the simultaneous opening of the air inlet and liquid outlet channels when the inflation component is pressed down by means of a resettable switch valve core and its coordination with the internal structure of the liquid extraction body, thereby achieving the synchronous completion of inflation and liquid discharge. And the beam plug-in or filter component docking guide part can be selected according to different application scenarios to meet the corresponding usage scenarios. The dual-circuit liquid extraction device can be adapted to different forms of inflation terminals (such as the above-mentioned fixed inflation terminal or handheld inflation terminal, or wall-mounted, desktop, etc. inflation terminals), or the inflation structure can be integrated into the liquid extraction body to meet the needs of different usage scenarios. In addition, after completing the inflation and liquid extraction operation, you can discharge part of the compressed gas in the bottle by pressing the switch valve core, and you can also discharge the liquid remaining in the liquid outlet to prevent liquid accumulation in the pipeline; when applying subpackaging, you can connect the subpackaging joint to the subpackaging bag for filling, or you can press the switch valve core to allow excess gas in the bottle to enter the subpackaging bag, which is convenient for properly squeezing out excess gas when sealing the subpackaging bag, making the internal environment of the package more stable and suitable for storage.

[0050] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and changes are within the scope of the claims of the present invention and their equivalents, the present invention is also intended to cover these modifications and changes. 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 recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be considered as limiting the scope.

Claims

1. A dual-pipeline liquid extraction device, characterized in that: It includes a liquid extraction body, a switch valve core, a sealing sleeve and a flow guide. The sealing sleeve is sleeved on the lower part of the liquid taking body and is used to seal with the bottle mouth of the bottle body to be taken. The upper part of the liquid taking body is provided with an opening cavity, and one side of the liquid taking body is provided with a liquid outlet. The interior of the liquid taking body is provided with a first cavity for accommodating the switch valve core, and the liquid outlet is communicated with the middle part of the first cavity; The guide part is connected to the lower part of the liquid taking body and inserted into the sealing sleeve. The circumferential surface of the guide part is provided with axial guide plates in an array to form a plurality of guide areas on the circumferential surfaces of the sealing sleeve and the guide part. A second cavity is provided inside the guide part, and a connecting hole connecting the guide area and the second cavity is provided at the upper part of the guide part. A check valve is provided 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 guide part. An air inlet channel is arranged inside the switch valve core, and an air outlet hole connected to the air inlet channel is radially penetrated through the lower part of the switch valve core. A first sealing structure and a liquid outlet channel are arranged on the middle circumferential surface of the switch valve core. The top of the switch valve core is arranged in the opening cavity through an elastic reset structure, so that the first sealing structure blocks the liquid outlet channel and the air outlet is closed by the check valve. When the switch valve core is pressed to cause axial displacement, the liquid outlet is connected to the liquid outlet channel and the air outlet is connected to the lower part of the second cavity.

2. A dual-pipeline liquid extraction device according to claim 1, characterized in that: An air filling hole is arranged at the center of the top of the switch valve core, and the air filling hole is communicated with the air inlet passage. The elastic reset structure is a spring arranged between the top of the switch valve core and the bottom of the opening cavity.

3. A dual-pipeline liquid extraction device according to claim 1, characterized in that: The liquid outlet channel is a first area between a depression arranged on the middle circumferential surface of the switch valve core and the middle of the first cavity, and a second area between an axial protrusion arranged at intervals on the lower circumferential surface of the switch valve core and the upper part of the second cavity. The first area is connected to the liquid outlet, and the first sealing structure blocks the connection between the first area and the second area. When the switch valve core is pressed to cause axial displacement, the first area and the second area are connected.

4. A dual-pipeline liquid extraction device according to claim 3, characterized in that: A second sealing structure is arranged between the surface of the switch valve core above the first area and the first cavity.

5. A dual-pipeline liquid extraction device according to claim 1, characterized in that: The axial flow guide plate is provided with a toothed structure.

6. A dual-pipeline liquid extraction device according to claim 1, characterized in that: The check valve is hollow inside and is provided with an upper cavity and a lower cavity. The upper cavity is slidably sealed with the bottom of the switch valve core, and the lower cavity has an inner diameter larger than that of the upper cavity.

7. A dual-pipeline liquid extraction device according to claim 1, characterized in that: It also includes a beam plug-in, which is sealed and matched with the end of the guide part, and a beam hole is provided through the inside of the beam plug-in.

8. A 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 with 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 and connected with the end of the guide part.

9. A liquid collection system, comprising the dual-pipeline liquid collection device according to any one of claims 1 to 8, characterized in that: It also includes an inflation component and an air source, wherein the inflation component is connected to the air source, and the inflation component presses the switch valve core to inflate and take out liquid.

10. A liquid extraction system according to claim 9, characterized in that: The inflation component is an inflation terminal fixed to the facade, and an inflation portion for press-fitting with the inflation hole of the switch valve core is obliquely arranged on the inflation terminal.

11. A method for taking liquid by inflation, using the dual-pipeline liquid taking device according to any one of claims 1 to 8, characterized in that: include: S1: inserting the dual-pipe liquid extraction device into the bottle to be extracted, tilting the bottle to be extracted, and using 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 performing inflation and liquid extraction synchronous operation; S2: After the liquid is taken out, the external inflation component is removed and the bottle body is placed upright, and the switch valve core is pressed to discharge the excess compressed gas in the bottle body to be taken out, and the liquid retained in the liquid outlet is blown out at the same time.

12. The method for filling and extracting liquid according to claim 11, characterized in that: It also includes a subpackaging step: connecting the subpackaging bag body through the joint set at the liquid outlet, using S1 to fill the subpackaging bag body, pressing the switch valve core to inject excess compressed gas into the subpackaging bag body after the filling is completed, and removing the joint to connect the subpackaging bag body.

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