Liquid delivery system and liner bag and manufacturing method thereof

Abstract

The present invention discloses a liquid delivery system, a liner bag, and a manufacturing method. The liner bag includes a liner bag body and a discharge port. The liner bag body is formed by sealing and welding a front piece and a back piece along four sides, and the discharge port is sealed and connected to the liner bag body. The liner bag body is substantially rectangular, and the liner bag body has two pairs of opposite sides, and the corresponding adjacent sides in the two pairs of opposite sides are connected by one or more transition edges. The liner bag of the present invention is simple to manufacture and will not form a barrier lake during the liquid discharge process. It is particularly beneficial for the discharge of viscous liquids. After the discharge is completed, little liquid remains.

Description

Technical Field

[0001] The present invention relates to a container, in particular to a liner bag for containing liquid. Background Art

[0002] For liquid storage, transportation, filling, and discharge, a wide variety of liquid storage and transportation devices are currently available on the market, including intermediate bulk containers (IBCs) equipped with liner bags for storing and transporting solutions. Liner bags for IBCs are generally classified into two types: six-sided, three-dimensional liner bags and two-sided, pillow-shaped liner bags. Three-dimensional liner bags are challenging to produce, as each facet must be welded, resulting in low production efficiency and high costs. Pillow-shaped liner bags are increasingly popular in the market due to their ease of use and low processing costs.

[0003] Chinese patent application number CN201320108508 discloses a sealed liquid bag. Its main component is a sealed soft container made of PVC-coated cloth through heat-melt welding or high-frequency welding; the sealed soft container is equipped with a liquid inlet valve and a liquid outlet valve at each end. This liquid liner bag is effective for general high-flow rate, fluid-rich liquids. However, when discharging viscous liquids, the liquid discharge is slow and inefficient. After discharge, a large amount of liquid remains in the liner bag, resulting in costly waste. Typically, when discharge is nearing completion, an external object such as a screw extruder is used to wrap around the liner bag to squeeze out the remaining liquid. Summary of the Invention

[0004] The object of the present invention is to provide a liner bag which is easy to weld and is conducive to the discharge of liquid contained therein, especially viscous liquid.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present invention, a liner bag is provided, which includes a liner bag body and a discharge port. The liner bag body is formed by sealing and welding a front piece and a back piece along all four sides, and the discharge port is sealed and connected to the liner bag body. The liner bag body is substantially rectangular, and the liner bag body has two pairs of opposite side edges, and the corresponding adjacent side edges in the two pairs of opposite side edges are connected by one or more transition edges.

[0006] In one embodiment, the front panel and the back panel are substantially rectangular flexible sheets.

[0007] In one embodiment, a vertical distance between a vertex of each side in the two pairs of opposite sides and the adjacent side is equal to 1 / 20 to 1 / 10 of the total length of the side.

[0008] In one embodiment, the angles formed between adjacent sides of all corners of the liner bag body are obtuse angles.

[0009] In one embodiment, the edges of the liner bag body forming each corner are straight lines or arc lines.

[0010] In one embodiment, the liner bag has an unfolded state and a folded state. In the folded state, a first pair of opposite sides of the liner bag body are folded upward so that the portion of the liner bag body containing the discharge port faces upward, and a second pair of opposite sides of the liner bag body are folded upward toward the discharge port so that the edges of the second opposite sides are adjacent to the discharge port.

[0011] In one embodiment, the liner bag further has a filling port, and the filling port and the discharge port are respectively located on the front piece and the back piece.

[0012] In one embodiment, the discharge port is closer to the edge of the liner bag body than the filling port.

[0013] In one embodiment, the filling port is located in the middle of the front panel, the discharge port is located in the back panel, and the distance between the edge of the discharge port and the nearest edge of the liner bag body is less than one quarter of the length of the liner bag.

[0014] In one embodiment, the liner bag has an unfolded state and a folded state. In the folded state, a first pair of opposite sides of the liner bag body are folded upward so that the discharge port and the filling port are located on the same plane, and a second pair of opposite sides of the liner bag body are folded upward toward the filling port so that the edges of the second opposite sides are adjacent to the filling port and the discharge port.

[0015] In one embodiment, the volume of the liner bag is between 200 liters and 1250 liters, preferably 250 liters, 1000 liters or 1200 liters.

[0016] According to another aspect of the present invention, a method for manufacturing a liner bag is provided, wherein the liner bag comprises a liner bag body and a discharge port, wherein the liner bag body comprises a substantially rectangular front piece and a rear piece, and the manufacturing method comprises the following steps:

[0017] The front panel and the back panel are sealed and welded along all sides, and the discharge port is sealed and connected to the liner bag body, wherein the liner bag body has two pairs of opposite side edges, and the corresponding adjacent side edges in the two pairs of opposite side edges are connected by one or more transition edges;

[0018] The first pair of opposite sides of the liner bag body are folded upward so that the portion of the liner bag body containing the discharge port faces upward, and the second pair of opposite sides of the liner bag body are folded upward toward the discharge port so that the edges of the second opposite sides are adjacent to the discharge port.

[0019] According to another aspect of the present invention, a liquid delivery system is provided, comprising an intermediate bulk container, a liner bag, and a squeezer, wherein the intermediate bulk container comprises a base and a sidewall mounted on the base, the base being provided with a discharge channel, the liner bag being placed in the intermediate bulk container and comprising a liner bag body and a discharge port, and the squeezer comprising a pair of rollers, wherein:

[0020] The liner bag includes a liner bag body and a discharge port. The liner bag body is formed by sealing and welding a front piece and a back piece along four sides. The discharge port is sealed and connected to the liner bag body. The liner bag body is substantially rectangular, and the four corners of the liner bag body are cut off.

[0021] The discharge port of the liner bag is installed in the discharge channel; and

[0022] The squeezer is arranged so that when discharging the liquid in the liner bag, the squeezer is placed above the liner bag, and the pair of rollers clamp the top end of the liner bag.

[0023] The liner bag of the present invention is easy to manufacture and will not form a barrier lake during the liquid discharge process, which is particularly conducive to the discharge of viscous liquids. After the discharge is completed, little liquid remains. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 1 is a schematic structural diagram of a liner bag according to a first embodiment of the present invention.

[0025] Figure 2 2 is a schematic structural diagram of a liner bag according to a second embodiment of the present invention.

[0026] Figure 3 1 is a schematic structural diagram of a liner bag according to a third embodiment of the present invention.

[0027] Figures 4 to 7 It shows Figure 1 Schematic diagram of the folding process of the liner bag shown.

[0028] Figures 8-10 FIG. 1 is a diagram illustrating a process of filling a liner bag with liquid according to an embodiment of the present invention.

[0029] Figures 11-13 FIG. 1 is a diagram illustrating a process of filling a liner bag with liquid according to another embodiment of the present invention.

[0030] Figures 14-17 FIG. 1 is a schematic diagram illustrating a process of discharging liquid by a liquid delivery system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following will describe in detail various embodiments of the present invention in conjunction with the accompanying drawings to provide a clearer understanding of the objectives, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0032] In the following description, for the purpose of illustrating the various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0033] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, that is, should be interpreted to mean "including, but not limited to."

[0034] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0035] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0036] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but words such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and should not be understood as restrictive terms.

[0037] Figure 1 FIG. 1 is a schematic structural diagram showing a liner bag 100 according to a first embodiment of the present invention. Figure 1As shown, the liner bag 100 includes a liner bag body 101, a filling port 102, and a discharge port 103. The liner bag body 101 is formed by sealingly welding a front panel 1011 and a rear panel 1012 along its periphery. The main weld lines 100a of the liner bag are formed along the periphery of the liner bag body 101. Preferably, the front panel 1011 and the rear panel 1012 are substantially rectangular flexible sheets. The front and rear panels are typically made of plastic. The filling port 102 and the discharge port 103 are sealedly connected to the liner bag body. Specifically, the filling port 102 and the discharge port 103 are welded to the front panel 1011 and the rear panel 1012, respectively. The discharge port 103 is closer to the edge of the liner bag body than the filling port 102. Preferably, the filling port 102 is located in the middle of the front panel, the discharge port is located in the rear panel, and the distance between the edge of the discharge port and the nearest edge of the liner bag body is less than one-quarter of the length of the liner bag.

[0038] The liner bag body 101 is generally rectangular, essentially formed by removing the four corners of the rectangle. During production, the four corners of the front and rear panels can be cut off first, and then welded together. Alternatively, the rectangular front and rear panels can be welded together, and then the four corners can be cut off and the cutouts welded together. The filling and discharge ports can be sealed and connected to the front and rear panels, respectively, before or after the front and rear panels are welded together.

[0039] Specifically, the liner bag body 101 has two pairs of opposite side edges 1013, 1014, 1015, and 1016. Corresponding adjacent side edges in the two pairs of opposite side edges are connected by a transition edge 1017, 1018, 1019, and 1020. The transition edge can be a straight edge or an arc edge. Figure 1 The edges are shown as straight lines. The angles A, B, C, D, and E formed between each side edge and the transition edge are obtuse angles. The liner bag body 101 has four corners 1021, 1022, 1023, and 1024. When the transition edge is a straight line, the angles formed between adjacent edges at all corners of the liner bag body 101 are obtuse angles. The vertical distance between the vertex of each side edge and the adjacent side edge in two pairs of opposing side edges is equal to 1 / 20 to 1 / 10 of the total length of the side edge, preferably 1 / 15 to 1 / 10 of the total length of the side edge.

[0040] Figure 2 FIG. 2 is a schematic structural diagram showing a liner bag 200 according to a second embodiment of the present invention. Figure 2 The liner bag 200 of the illustrated embodiment is Figure 1 The difference between the liner bag 100 shown is that at least one corner of the liner bag 200 has a plurality of transition edges 201 . Figure 2One corner is shown as having two transition edges. It should be understood that two, three, or four corners can each have two or more transition edges. The transition edges can be straight lines or arcs. The rest are the same and will not be described in detail here.

[0041] Figure 3 FIG. 1 is a schematic structural diagram of a liner bag 300 according to a third embodiment of the present invention. Figure 3 The liner bag 300 of the embodiment shown is Figure 1 、 Figure 2 The difference between the liner bag shown is that the liner bag 300 does not have a separate filling port, but the filling port and the discharge port are integrated into one, that is, the discharge port 301 also serves as the filling port. The structure and manufacturing method of the liner bag can be the same as Figure 1 The liner bag 100 shown or Figure 2 The liner bag 200 shown is the same and will not be described in detail here.

[0042] Herein, the specifications (i.e., volume) of the liner bag are between 200 liters and 1250 liters, preferably 250 liters, 1000 liters, or 1200 liters. The front and rear piece sizes corresponding to the three specifications of the liner bag are approximately 0.95m*1.55m, 2.1m*2.25m, and 2.1m*2.45m, respectively.

[0043] Figures 4 to 7 It shows Figure 1 A schematic diagram of the folding process of the liner bag 100 shown. The liner bag of the present application has an unfolded state and a folded state. In the folded state, the first pair of opposite sides 104 and 105 of the liner bag body 101 are folded upward, and the portion of the liner bag body containing the discharge port 103 faces upward, so that the discharge port and the filling port are located on the same plane, and the second pair of opposite sides 106 and 107 of the liner bag body are folded upward toward the filling port, so that the edges of the second opposite sides are adjacent to the filling port and the discharge port. As an example, in the folding process of the liner bag 100, the first pair of opposite sides of the liner bag body are first folded toward the filling port, so that the discharge port and the filling port are located on the same plane, and the second pair of opposite sides of the liner bag body are folded toward the filling port, so that the edges of the second opposite sides are adjacent to the filling port and the discharge port. Folding is thus completed. Figure 2 and Figure 3 The folding process of the liner bags 200 and 300 shown is similar to that of the liner bags 200 and 300. Figure 1 The folding process of the liner bag 100 shown is the same and will not be described in detail here.

[0044] Figures 8-10The figure illustrates the process of filling a liner bag 100 with liquid according to one embodiment of the present invention. As shown, during the filling process, the liner bag 100 is first placed flat on the bottom of an intermediate bulk container (IBC) 400, with the filling port 102 facing upward. The discharge port 103 is then installed in the IBC's discharge channel. Next, the filling port 102 is connected to the pipe 500, and the liquid is then filled into the liner bag 100 via the pipe 300.

[0045] Figures 11-13 The figure illustrates the process of filling a liner bag 300 with liquid according to another embodiment of the present invention. As shown, during the filling process, the liner bag 300 is first placed flat on the bottom of an intermediate bulk container (IBC) 400, and the drain port 301 is installed in the IBC's discharge channel. Next, the drain port 102 is connected to the pipe 500, and the liquid is then filled into the liner bag 100 through the pipe 500.

[0046] Figures 14-17 FIG. 6 is a schematic diagram showing a process of discharging liquid by a liquid delivery system 600 according to an embodiment of the present invention. Figures 14-17 As shown, the liquid delivery system 600 includes an intermediate bulk container 400, a liner bag and a squeezer 700, wherein the intermediate bulk container 400 includes a base 401 and a side wall 402 installed on the base. A discharge channel 4011 is provided on the base 401. The liner bag is placed in the intermediate bulk container and the discharge port of the liner bag is installed in the discharge channel. The squeezer 700 has a pair of rollers 701. The squeezer can adopt the squeezer disclosed in the Chinese invention patent application with application number 201710656555.5, the entire text of which is incorporated herein by reference. The squeezer can also adopt a squeezer known in the art or to be developed.

[0047] During the discharge process, a pusher is placed above the liner bag, with a pair of rollers gripping the top of the bag. A valve mounted outside the IBC discharge channel is then opened, and the pusher is activated. During the discharge process, the pusher's pair of rollers roll, squeezing the liner bag, pushing the liquid downward and reducing any remaining liquid in the bag. During the discharge process, the pusher automatically lowers as the amount of liquid in the liner bag decreases.

[0048] The liner bag of the present invention has improved corners, eliminating conventional right angles. This solves the problem of dammed lakes in the liner bag, eliminates dead corners where liquid could accumulate, and reduces residual volume after discharge. Furthermore, the bag has a simple structure, and is easy to fold and fill, saving costs. It is particularly suitable for the storage and transportation of viscous liquids.

[0049] While the preferred embodiments of the present invention have been described in detail above, it should be understood that, after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. Such equivalents also fall within the scope of the claims appended hereto.

Claims

1. A liner bag comprising a liner bag body and a discharge port, wherein the liner bag body is formed by sealingly welding a front piece and a back piece along four sides, and the discharge port is sealedly connected to the liner bag body, characterized in that: The liner bag body is substantially rectangular, and has two pairs of opposite side edges, and the corresponding adjacent side edges in the two pairs of opposite side edges are connected by one or more transition edges; The liner bag further has a filling port, wherein the filling port and the discharge port are respectively located on the front piece and the back piece, and the discharge port is closer to the edge of the liner bag body than the filling port; The liner bag has an unfolded state and a folded state. In the folded state, a first pair of opposite sides of the liner bag body are folded upward so that the portion of the liner bag body containing the discharge port faces upward and the discharge port and the filling port are located on the same plane; and a second pair of opposite sides of the liner bag body are folded upward toward the discharge port so that the edges of the second pair of opposite sides are adjacent to the filling port and the discharge port.

2. The liner bag according to claim 1, wherein: The front panel and the back panel are substantially rectangular flexible sheets.

3. The liner bag according to claim 1, wherein: The vertical distance between the vertex of each side in the two pairs of opposite sides and the adjacent side is equal to 1 / 20 to 1 / 10 of the total length of the side.

4. The liner bag according to claim 1, wherein: The angles formed between adjacent sides of all corners of the liner bag body are obtuse angles.

5. The liner bag according to claim 1, wherein: The sides forming each corner of the liner bag body are straight lines or arc lines.

6. The liner bag according to claim 1, wherein: The volume of the liner bag is between 200 liters and 1250 liters.

7. The liner bag according to claim 6, characterized in that: The volume of the liner bag is 250 liters, 1000 liters or 1200 liters.

8. A method for manufacturing a liner bag, wherein the liner bag comprises a liner bag body and a discharge port, wherein the liner bag body comprises a substantially rectangular front piece and a rear piece, wherein: The manufacturing method comprises the following steps: The front panel and the back panel are sealed and welded along all sides, and the discharge port is sealed and connected to the liner bag body, wherein the liner bag body has two pairs of opposite side edges, and the corresponding adjacent side edges in the two pairs of opposite side edges are connected by one or more transition edges; The liner bag further has a filling port, wherein the filling port and the discharge port are respectively located on the front piece and the back piece, and the discharge port is closer to the edge of the liner bag body than the filling port; The first pair of opposite sides of the liner bag body are folded upward so that the portion of the liner bag body containing the discharge port faces upward and the discharge port and the filling port are located on the same plane; and the second pair of opposite sides of the liner bag body are folded upward toward the discharge port so that the edges of the second pair of opposite sides are adjacent to the filling port and the discharge port.

9. A liquid delivery system comprising an intermediate bulk container, a liner bag, and a squeezer, wherein the intermediate bulk container comprises a base and a sidewall mounted on the base, the base being provided with a discharge channel, the liner bag being placed within the intermediate bulk container and comprising a liner bag body and a discharge port, and the squeezer comprising a pair of rollers, wherein: The liner bag comprises a liner bag body and a discharge port, wherein the liner bag body is formed by sealing and welding a front piece and a back piece along four sides, and the discharge port is sealed and connected to the liner bag body, and the liner bag body is substantially rectangular, and the four corners of the liner bag body are cut off; The discharge port of the liner bag is installed in the discharge channel; The liner bag further has a filling port, wherein the filling port and the discharge port are respectively located on the front piece and the back piece, and the discharge port is closer to the edge of the liner bag body than the filling port; The liner bag has an unfolded state and a folded state. In the folded state, a first pair of opposite side portions of the liner bag body are folded upward so that a portion of the liner bag body including the discharge port faces upward and the discharge port and the filling port are located on the same plane. A second pair of opposite side portions of the liner bag body are folded upward toward the discharge port so that edges of the second pair of opposite side portions are adjacent to the filling port and the discharge port. as well as The squeezer is arranged so that when discharging the liquid in the liner bag, the squeezer is placed above the liner bag, and the pair of rollers clamp the top end of the liner bag.

Images