Liquid storage bag end cap structure and decanting and venting method

Abstract

The application provides a liquid storage bag end cover structure, which comprises an end cover body, a ball cage structure and a check valve structure, the end cover body is used for connecting the liquid storage bag and is internally hollow, the ball cage structure is arranged in the interior of the end cover body and is in sealing cooperation with the end cover body, the ball cage structure comprises a floating ball cover and a floating ball, the bottom of the floating ball cover is a hollow spherical structure, a hollow structure is arranged on the surface of the hollow spherical structure, and the floating ball is arranged in the hollow spherical structure, and the check valve is arranged at the end of the end cover body and is in sealing cooperation with the opening of the floating ball cover, so that the air in the liquid storage bag is discharged through the check valve when being pressed, and the floating ball can close the opening of the floating ball cover along with the increase of the liquid level in the liquid storage bag. The liquid storage bag end cover structure can realize the exhaust operation in the liquid storage bag through the extrusion mode after the liquid storage bag is filled, and the influence of the air remaining in the bag on the liquid stored in the bag is avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of liquid filling, and particularly relates to a liquid storage bag end cap structure and a sub-packaging and air exhausting method. BACKGROUND

[0002] In daily life, when filling a soft bag container with liquid, some air is usually entrained into the bag, and some air is also stored in the pipe portion of the bag and the interlayer of the main body of the bag before filling. If the stored air is not immediately exhausted before the bag is sealed after filling, it will have an irreversible negative impact on the storage quality of the liquid in the bag, especially for some products that are sensitive to oxidation, such as wine, sake, coffee, etc. Therefore, how to quickly exhaust the air stored in the bag after filling plays a crucial role in the storage quality of the liquid in the bag. SUMMARY

[0003] In order to solve the technical problem that it is difficult to quickly exhaust the air stored in the bag after filling in the prior art so that the liquid in the bag can be better stored, the present application provides a liquid storage bag end cap structure and a sub-packaging and air exhausting method to solve the above technical defect problem.

[0004] According to a first aspect of the present application, a liquid storage bag end cap structure is provided, comprising an end cap body, a ball cage structure and a check valve structure, the end cap body is used for connecting a liquid storage bag and is hollow inside, the ball cage structure is arranged inside the end cap body and is in sealing cooperation with the end cap body, the ball cage structure comprises a floating ball cover and a floating ball, the bottom of the floating ball cover is a hollow spherical structure, and a hollow structure is formed on the surface of the hollow spherical structure, the floating ball is arranged in the hollow spherical structure, and the check valve is arranged at the end of the end cap body and is in sealing cooperation with the mouth of the floating ball cover, so that the air in the liquid storage bag is exhausted through the check valve when the air is under pressure, and the floating ball can close the mouth of the floating ball cover as the liquid level in the liquid storage bag rises. The liquid storage bag end cap structure can be matched with the liquid storage bag, and through the ball cage structure and the check valve structure inside the liquid storage bag end cap structure, the liquid storage bag can be exhausted by pressing after filling, and the gas sealing property and the liquid leakage prevention performance of the liquid storage bag after exhausting can be ensured, and the preservation time of the liquid in the bag is improved.

[0005] In some specific embodiments, the floating ball cover is provided with an annular protruding limiting portion at the inlet of the hollow spherical structure, and the diameter of the annular protruding limiting portion is smaller than the diameter of the floating ball. By virtue of this arrangement, when the liquid storage bag is in an inclined, suspended or inverted state, the floating ball can be prevented from entering the top horn mouth and causing accidental blockage of the channel, so that the floating ball is not blocked in the pipe mouth when the liquid storage bag is vertically exhausted.

[0006] In some specific embodiments, the floating ball cover is made of silica gel, and the floating ball is made of a material with a density smaller than that of the liquid stored in the liquid storage bag. By virtue of this arrangement, the floating ball can close the air outlet channel as the liquid level rises.

[0007] In some specific embodiments, the check valve includes an upper cover and a check valve body. The upper cover is provided with an exhaust hole. The cross-sectional area of ​​the exhaust hole is configured such that, while the check valve body provides resistance to the pressurized air within the liquid storage bag, the float is prevented from being drawn into the exhaust port of the float housing by the exhaust airflow. This configuration ensures a high exhaust speed while preventing the float from being drawn into the exhaust pipe prematurely and potentially blocking the pipe.

[0008] In some specific embodiments, the check valve body includes an umbrella check valve structure and a pipe-covered check valve structure. A variety of check valve structures (including a pipe-mouth-covered membrane type and a pressure ball type) increase the selectivity of the overall structure.

[0009] In some specific embodiments, the umbrella-type check valve structure includes an umbrella-type valve core, an air outlet channel and a valve core column disposed at the lower portion of an upper cover plate, and the umbrella-type valve core is sleeved onto the valve core column. The umbrella-type valve core's cover edge seals against the air outlet channel, controlling the air outlet resistance through the seal. This arrangement utilizes the seal force between the umbrella-type valve core edge and the air outlet channel to control the air outlet resistance, achieving a check valve effect.

[0010] In some specific embodiments, the end cap body is further provided with a sliding sleeve and a spring. A clamping claw portion is provided at the front end of the end cap body, and a limit outer edge is provided at the end of the clamping claw portion. An annular protrusion structure is provided on the inner surface of the sliding sleeve. The sliding sleeve slides along the annular protrusion structure in the area between the limit outer edge and the liquid storage bag connection portion. When the sliding sleeve slides along the annular protrusion structure to one side of the limit outer edge, the clamping claw portion tightens. The spring is provided in the area between the annular protrusion structure of the sliding sleeve and the end cap body. With this arrangement, when the check valve structure is not assembled, the sliding sleeve and the clamping claw portion can be used in conjunction with the liquid dispensing head to perform a filling operation. After the filling operation is completed, the check valve can be assembled to perform an exhaust operation.

[0011] In some specific embodiments, the valve core body of the covered tube check valve structure includes an outlet guide pin and a silicone outer tube sleeve. The outlet guide pin has an outlet channel disposed therein, and a surface of the outlet guide pin has an outlet hole that communicates with the outlet channel. The silicone outer tube sleeve is disposed on the surface of the outlet guide pin. Pressurized air in the liquid storage bag overcomes the sheathing force of the silicone outer tube sleeve and the outlet guide pin, escaping from the joint between the two and being discharged through the exhaust hole in the upper cover plate. This arrangement utilizes the sheathing force between the silicone outer tube sleeve and the outlet guide pin to control outlet resistance, thereby achieving a check valve effect.

[0012] According to a second aspect of the present invention, a sub-packaging and venting method is proposed, using the above-mentioned liquid storage bag end cover structure, comprising:

[0013] S1: After the liquid storage bag equipped with the liquid storage bag end cover structure is filled, the liquid storage bag is pressed vertically so that the air in the bag is discharged out of the liquid storage bag through the cage structure and the check valve structure as the liquid level in the bag rises;

[0014] S2: When the liquid level in the bag rises to the ball cage structure, the floating ball floats out of the hollow spherical structure into the mouth of the floating ball cover, and further closes the gas outlet channel under the action of the liquid pressure in the bag.

[0015] In some specific embodiments, in step S2, the floating ball cover is provided with an annular protruding limiting part at the inlet of the hollow spherical structure, which is smaller than the diameter of the floating ball. The floating ball passes through the annular protruding limiting part and closes the gas outlet channel of the mouth of the floating ball cover under the action of the buoyancy and pressure of the rising liquid level in the pressure storage liquid bag.

[0016] Compared with the prior art, the beneficial results of the present application are:

[0017] The liquid storage bag end cap structure in the present application can pressurize and discharge through the ball cage structure and the check valve structure inside it after the liquid storage bag is filled. Further, through the matching design of the exhaust hole of the check valve upper cover plate and the exhaust resistance of the check valve, the controlled exhaust gas flow can avoid the floating ball being sucked into the exhaust pipe and blocking the pipeline too early while exhausting. Meanwhile, the present application also discloses a sub-packaging and discharging method. The exhaust after filling using the liquid storage bag end cap structure can ensure the gas sealing and liquid leakage prevention performance of the liquid storage bag after discharging, and improve the preservation time of the liquid in the bag. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of 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 application. Other embodiments and many of the intended advantages of the present application will be readily appreciated as the same becomes better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.

[0019] Figure 1 is a structural schematic diagram of a liquid storage bag end cap according to the first embodiment of the present application;

[0020] Figure 2 is a structural schematic diagram of a liquid storage bag end cap according to the first embodiment of the present application;

[0021] Figure 3 is an exploded view of a liquid storage bag with a liquid storage bag end cap structure according to the first embodiment of the present application;

[0022] Figure 4 is a cross-sectional schematic diagram of a liquid storage bag with a liquid storage bag end cap structure according to the first embodiment of the present application;

[0023] Figure 5 is a structural schematic diagram of a liquid storage bag end cap according to the second embodiment of the present application;

[0024] Figure 6 is a structure diagram of a liquid storage bag with a liquid storage bag end cap structure according to a second embodiment of the present application;

[0025] Figure 7 is an exploded view of a liquid storage bag with a liquid storage bag end cap structure according to a second embodiment of the present application;

[0026] Figure 8 is a cross-sectional view of a liquid storage bag with a liquid storage bag end cap structure according to a second embodiment of the present application;

[0027] Figure 9 is a flow diagram of a sub-packaging exhaust method according to a specific embodiment of the present application.

[0028] The meanings of the numbers in the figures are as follows: 100 - first end cap structure, 110 - end cap body, 111 - jaw portion, 120 - ball cage structure, 121 - floating ball, 130 - check valve structure, 131 - valve core column, 132 - umbrella valve core, 140 - sliding sleeve, 150 - spring, 200 - second end cap structure, 210 - second end cap body, 220 - second ball cage structure, 221 - second floating ball, 230 - check valve upper cover, 240 - gas outlet guide column, 250 - silica gel outer tube sleeve, 300 - liquid storage bag. DETAILED DESCRIPTION

[0029] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration illustrative embodiments in which the application can be practiced. For purposes of explanation and illustration, directional terms are used with reference to the orientation of the described figures. Because components of embodiments can be positioned in a number of different orientations, the directional terminology is used in connection with the illustrative embodiments for purposes of illustration only and is in no way limiting. It is to be understood that other embodiments can be utilized and logical changes can be made without departing from the scope of the present application. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present application is defined by the appended claims.

[0030] The present application proposes a liquid taking device, Figure 1 shows a structure diagram of a liquid storage bag end cap according to a first embodiment of the present application, as Figure 1 shown, the body of the liquid storage bag end cap structure in this embodiment is specifically a first end cap structure 100, the upper end of which is provided with an exhaust hole, and the lower part has a hollow floating ball structure, the inside of which can realize exhaust operation through the configured valve structure and cavity channel, the specific structure and principle are described in detail in the application of Figures 2-4 .

[0031] Figure 2FIG. 1 shows a schematic structural diagram of a liquid storage bag equipped with a liquid storage bag end cover structure according to a first embodiment of the present invention. Figure 2 As shown, the first end cap structure 100 cooperates with the liquid storage bag 300, wherein one end of the liquid storage bag 300 is provided with a connector for connecting to the first end cap structure 100. The first end cap structure 100 cooperates with the connector, and the cooperation mode can be realized by a threaded connection mode, which is convenient for operation. The surface of the first end cap structure 100 is provided with a concave point structure, which can increase the friction during rotation or sliding, and is convenient for user operation. Figure 3 An exploded view of a liquid storage bag equipped with a liquid storage bag end cover structure according to a first embodiment of the present invention is shown, and Figure 4 A cross-sectional schematic diagram of a liquid storage bag equipped with a liquid storage bag end cover structure according to a first embodiment of the present invention is shown, and the structure is described in detail:

[0032] In a specific embodiment, the first end cover structure 100 specifically includes an end cover body 110, a ball cage structure 120, a check valve structure 130 and a sliding sleeve 140. The end cover body 110 is a hollow structure, and its inner surface is provided with a threaded structure that cooperates with the connecting head of the liquid storage bag 300. The ball cage structure 120 is arranged inside the end cover body 110, and the upper part of the ball cage structure 120 is sealed with the inner surface of the end cover body 110, which can be specifically achieved through the annular sealing protrusion on the upper part of the ball cage structure 120. The bottom of the cage structure 120 is a hollow spherical structure, the surface of the hollow spherical structure is provided with a hollow structure, a float 121 is provided in the hollow spherical structure, the outer cover of the cage structure 120 is in the shape of a light bulb or a water droplet, the diameter of the float 121 is smaller than the inner diameter of the hollow spherical structure, and larger than the inner diameter of the outer cover channel at the upper part of the hollow spherical structure, and the outer cover is provided with an annular raised stopper smaller than the diameter of the float at the entrance of the hollow spherical structure, and the annular raised stopper holds the cage structure 120 in place. It is divided into two upper and lower chambers. The upper chamber is connected to the check valve, and the lower chamber is a hollow spherical structure. The limit part can prevent the float from accidentally entering the top bell mouth and causing the channel to be accidentally stuck, resulting in the float being stuck in the pipe mouth and hindering exhaust when upright exhaust is required. In addition, after the float 121 is squeezed through the annular raised limit part in the middle of the ball cage structure 120 and enters the sealed pipe of the upper chamber, a check resistance is generated, which further stabilizes the position of the float 121 and continuously maintains the sealing effect.

[0033] In a specific embodiment, the outer cover of the float is made of silicone material, and the float is made of a material with a density lower than the density of the liquid stored in the liquid storage bag. The float material can be selected from a food-grade polymer material with a lower density, such as PP polypropylene with a density of 0.9g / cm 3 about.

[0034] In a specific embodiment, the upper part of the end cap body 110 is provided with a clamping jaw part 111 for cooperating with the liquid taking head during filling to prevent falling off. The end part of the clamping jaw part 111 is provided with a limiting outer edge, and the inner surface of the sliding sleeve 140 is provided with an annular protruding structure. The sliding sleeve 140 slides along with the annular protruding structure in the area between the limiting outer edge and the middle part of the end cap body 110. When the annular protruding structure of the sliding sleeve 140 slides to one side of the limiting outer edge, the clamping jaw part 111 is tightened. The area between the annular protruding structure of the sliding sleeve 140 and the end cap body 110 is also provided with a spring 150. After filling is completed, the sliding sleeve 140 can be unlocked by sliding, and the check valve structure 130 is inserted for corresponding exhaust operation.

[0035] In a specific embodiment, the check valve structure 130 includes an upper cover, a valve core column 131, and an umbrella type valve core 132. The check valve structure 130 is in sealing cooperation with the mouth part of the ball cage structure 120. The surface of the upper cover is provided with an exhaust hole. The valve core column 131 is arranged in the middle part of the gas outlet channel of the lower part of the upper cover. The outer wall of the gas outlet channel is inserted into and sealingly cooperates with the upper chamber mouth part of the ball cage structure 120. The umbrella type valve core 132 is sleeved on the valve core column 131. The umbrella cover edge of the umbrella type valve core 132 is in sealing cooperation with the gas outlet channel of the upper chamber and controls the exhaust resistance by the degree of cooperation.

[0036] In this application, how to make the user complete the extrusion of the bag and exhaust the internal gas at one time, without causing the floating ball (which is very light) to be sucked into the channel by the airflow at the air duct mouth of the ball cage structure, thereby interrupting the exhaust. When the bag is vertically extruded, the airflow passing through the ball cage top exhaust pipe will generate a certain negative pressure near the ball cage inner pipe mouth. The material density of the floating ball is generally not high, for example, the density of PP polypropylene is about 0.9 g / cm3. If the traction force generated by this negative pressure exceeds the weight of the floating ball, the floating ball at the bottom of the ball cage will be forced to rise. At this time, the floating ball has not yet contacted the liquid surface rising in the bag. Once the floating ball is sucked into the pipe mouth, it will prematurely block the exhaust pipe and interrupt the exhaust. Therefore, how to control the exhaust speed is the key to solving this problem. Therefore, the design of the exhaust hole and the exhaust resistance of the check valve core is an important point of this application. The cross-sectional area of the exhaust hole of this application is set as follows: under the condition that the check valve body generates resistance to the pressurized air in the liquid storage bag, the floating ball will not be sucked into the exhaust mouth of the floating ball cover under the action of the exhaust airflow. Under the condition of applying the same pressure to the outer wall of the bag, the factors affecting the exhaust speed mainly include the cross-sectional area of the upper cover exhaust hole and the resistance generated by the check valve body. When the cross-sectional area of the exhaust hole exceeds a certain value, its size will no longer be related to the exhaust speed. For example, according to the inventor's test, when the cross-sectional area of the exhaust hole is less than 1.2 mm 2 , the exhaust flow rate will decrease with the decrease of the hole diameter, and when it exceeds 1.5 mm 2The rear flow rate change difference is not large. In the embodiment, the outflow resistance of the check valve is controlled by the fitting force of the umbrella cover edge and the inner cavity, and the resistance generated by the check valve body forms a certain impedance effect on the force of the external squeeze bag. By adjusting the above two factors, the controlled exhaust gas flow avoids the floating ball being sucked into the exhaust pipe and blocking the pipeline too early while exhausting. In actual use, too slow exhaust speed will also affect the user's experience, so the variables can be properly adjusted in structure and material to smoothly complete the squeeze exhaust after the liquid storage bag is filled.

[0037] In a specific embodiment, the detachable check valve structure in the embodiment can be reused. After use, the check valve structure is removed, and the floating ball is pushed back into the ball cage structure from above the annular protrusion limiting part using a tool, so as to continue the filling and exhaust operation next time.

[0038] In another specific embodiment, Figure 5 The structure diagram of the liquid storage bag end cover according to the second embodiment of the application is shown in FIG. 2, which mainly includes a second end cover structure 200 and a liquid storage bag 300. Figure 5 As shown in the figure, the body of the liquid storage bag end cover structure in the embodiment is specifically a second end cover structure 200, which is similar to the internal principle of the previous embodiment, and the specific structure and principle are described in detail in combination with the application in Figures 6-8 .

[0039] Figure 6 The structure diagram of the liquid storage bag equipped with the liquid storage bag end cover structure according to the second embodiment of the application is shown in FIG. 3, which mainly includes a second end cover structure 200 and a liquid storage bag 300. Figure 6 As shown in the figure, the cooperation mode of the liquid storage bag 300 and the second end cover structure 200 is the same as that of the previous embodiment, and both can be connected in a threaded manner. The surface of the second end cover structure 200 is arrayed with anti-skid protrusions in the circumferential direction, which can increase the friction force during rotation and facilitate the operation of the user. The structure is described in detail in combination with the exploded view of the liquid storage bag equipped with the liquid storage bag end cover structure according to the first embodiment of the application shown in Figure 7 , and the cross-sectional view of the liquid storage bag equipped with the liquid storage bag end cover structure according to the first embodiment of the application shown in Figure 8 .

[0040] In a specific embodiment, the second ball cage structure 220 and the second floating ball 221 of the present embodiment are similar to those of the first embodiment, which will not be described again here, and the difference lies in the cooperation structure of the ball cage structure top and the check valve structure. In addition, unlike the umbrella valve core structure of the first embodiment, a pipe-covered check valve structure is adopted in the present embodiment, the valve core body includes a valve core seat, an air outlet guide column 240, and a silica gel outer tube sleeve 250, the lower part of the valve core seat is in sealing cooperation with the upper mouth part of the ball cage structure 220, the air outlet guide column 240 is arranged at the upper part of the valve core seat, the check valve upper cover 230 is in sealing cooperation with the mouth part of the end cover body 210, the surface of the check valve upper cover 230 is provided with an air exhaust hole communicating with the inner cavity of the end cover body 210, the valve core body is arranged in the cavity structure formed by the check valve upper cover 230 and the ball cage structure 220 inside the end cover body 210, and an air exhaust passage is arranged on the valve core seat to communicate the cavity and the air exhaust hole for facilitating air exhaust. The inside of the air outlet guide column 240 is provided with an air outlet passage penetrating to the bottom of the valve core seat, the surface of the air outlet guide column 240 is provided with an air outlet hole communicating with the air outlet passage, the silica gel outer tube sleeve 250 is arranged on the surface of the air outlet guide column 240, and the pressurized air of the liquid storage bag 300 overcomes the cladding force of the silica gel outer tube sleeve 250 and the air outlet guide column 240 to escape from the cooperation part of the two and is exhausted from the air exhaust hole of the check valve upper cover 230.

[0041] In a specific embodiment, the check valve can have multiple options, in addition to the pipe-covered and umbrella structures in the above two embodiments, a pipe mouth film-covered structure, a pressure ball structure, etc. can also be selected. As a preferred option, the pipe-covered and umbrella structures have the common advantages of the pressure ball structure and the pipe mouth film-covered structure: there is a certain air inlet resistance during normal operation, which can control the exhaust speed and also strengthen the check function; the structure is simple and reliable, and the check function can be realized only by relying on the elasticity of the material itself without the aid of a spring.

[0042] Continuing to refer to Figure 9 , Figure 9 A flow chart of the split exhaust method according to an embodiment of the present application is shown, as Figure 9 shown, the method includes:

[0043] S1: after the liquid storage bag equipped with the liquid storage bag end cover structure is filled, the liquid storage bag is vertically pressed to make the air in the bag escape from the liquid storage bag outside through the ball cage structure and the check valve structure as the liquid level in the bag rises;

[0044] S2: when the liquid level in the bag rises to the ball cage structure, the floating ball floats from the hollow ball structure into the mouth part of the floating ball cover, and further closes the air outlet passage under the action of the liquid pressure in the bag.

[0045] In specific embodiments, when the bag is squeezed, the excess gas in the top of the bag will be discharged upwards through the exhaust hole at the top end of the upper cover as the liquid level rises. If the exhaust volume is too large, the airflow will lift the float ball and block the passage, causing incomplete exhaust. Therefore, the check valve and exhaust hole at the top end can effectively reduce and control the exhaust volume, so that the float ball still adheres to the liquid level and is not lifted by the airflow to block the passage during squeezing and exhaust. When the liquid level rises to the bottom of the cover, the float ball will enter the horn from the bottom chamber and block the passage. At this time, all the gas in the bag is isolated in the top of the float ball, and the exhaust function is completed. The ball cage structure that restrains the float ball can be divided into two parts, which are divided by a circular opening (or a limiting protrusion) slightly smaller than the diameter of the float ball. The purpose is to prevent the float ball from mistakenly entering the top horn and causing accidental blockage of the passage when the bag is not exhausted (when the bag is in an inclined, suspended or inverted state).

[0046] The liquid storage bag end cover structure in the present application can make the controlled exhaust airflow avoid the float ball being sucked into the exhaust pipe and blocking the pipeline too early during exhaust through the matching design of the exhaust hole of the check valve upper cover plate and the exhaust resistance of the check valve. The gas in the liquid storage bag can be quickly and effectively discharged by pressing. The application also discloses a split charging and exhaust method. The exhaust after filling using the liquid storage bag end cover structure can ensure the gas sealing and liquid leakage prevention performance of the liquid storage bag after exhaust, and improve the preservation time of the liquid in the bag.

[0047] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the present application without departing from the spirit and scope of the present application. In this way, if these modifications and changes are within the scope of the claims of the present application and their equivalents, the present application also intends 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 described in mutually different dependent claims does not mean that the 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 reservoir bag end cap structure, characterized by, The end cover body is used for connecting a liquid storage bag and is hollow inside, the ball cage structure is arranged inside the end cover body and is in sealed cooperation with the end cover body, the ball cage structure comprises a floating ball cover and a floating ball, the bottom of the floating ball cover is a hollow spherical structure, the surface of the hollow spherical structure is provided with a hollow structure, the floating ball is arranged in the hollow spherical structure, the check valve is arranged at the end of the end cover body and is in sealed cooperation with the mouth of the floating ball cover, so that the air in the liquid storage bag is discharged through the check valve when the air is under pressure, the floating ball cover is provided with an annular protruding limiting portion smaller than the diameter of the floating ball at the inlet of the hollow spherical structure, the floating ball is made of a material with a density smaller than that of the liquid stored in the liquid storage bag, and the floating ball is forced to pass through the annular protruding limiting portion and close the air outlet channel of the mouth of the floating ball cover under the action of the buoyancy and pressure of the rising liquid surface in the liquid storage bag under pressure.

2. The reservoir bag end cap structure of claim 1, wherein The floating ball cover is made of silica gel.

3. The reservoir bag end cap structure of claim 1, wherein The check valve body comprises an umbrella type check valve structure or a pipe type check valve structure.

4. The reservoir bag end cap structure of claim 3, wherein The umbrella type check valve structure comprises an umbrella type valve core, the upper cover plate is provided with an air outlet channel and a valve core column at the lower part, the umbrella type valve core is sleeved on the valve core column, the umbrella cover edge of the umbrella type valve core is in sealed cooperation with the air outlet channel and controls the air outlet resistance through the cooperation degree.

5. The reservoir bag end cap structure of claim 4, wherein The end cover body is further provided with a sliding sleeve and a spring, the front end of the end cover body is provided with a clamping jaw portion, the end of the clamping jaw portion is provided with a limiting outer edge, the inner surface of the sliding sleeve is provided with an annular protruding structure, the sliding sleeve slides in the area between the limiting outer edge and the liquid storage bag connecting portion along with the annular protruding structure, and when the sliding sleeve slides to one side of the limiting outer edge along with the annular protruding structure, the clamping jaw portion is tightened, and the spring is arranged in the area between the annular protruding structure of the sliding sleeve and the end cover body.

6. The reservoir bag end cap structure of claim 3, wherein The valve core body of the pipe type check valve structure comprises an air outlet guide column and a silica gel outer tube sleeve, the inside of the air outlet guide column is provided with an air outlet channel, the surface of the air outlet guide column is provided with an air outlet hole penetrating through the air outlet channel, and the silica gel outer tube sleeve is arranged on the surface of the air outlet guide column. The air in the liquid storage bag under pressure overcomes the cladding force of the silica gel outer tube sleeve and the air outlet guide column and escapes from the cooperation position of the two and is discharged from the air outlet hole of the upper cover plate.

7. A method of dispensing exhaust gas, characterized by, The liquid storage bag end cover structure comprises: S1: after the liquid storage bag filled with the liquid storage bag end cover structure is filled, the liquid storage bag is vertically pressed, so that the air in the bag is discharged out of the liquid storage bag along with the rising liquid surface in the bag through the ball cage structure and the check valve structure; S2: When the liquid level in the bag rises to the ball cage structure, the floating ball floats from the hollow spherical structure into the mouth of the floating ball cover, further closing the gas outlet channel under the action of the liquid pressure in the bag.

8. The method of claim 7, wherein, In the step S2, the floating ball cover is provided with an annular protruding limiting part smaller than the diameter of the floating ball at the entrance of the hollow spherical structure, and the floating ball enters and closes the mouth of the floating ball cover through the annular protruding limiting part to close the gas outlet channel under the action of the buoyancy and pressure of the rising liquid level in the pressure storage liquid bag.

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