Environment-friendly replaceable anti-leakage filling pipe

Abstract

The invention discloses an environment-friendly replaceable anti-leakage filling pipe, and aims to solve the problems that in the prior art, an existing filling pipe is simple in structure, an inner bottle body and an outer bottle body are generally fixed and bonded through colloid, the inner bottle body and the outer bottle body cannot be recycled due to fixed connection of the colloid after use, environmental protection is not achieved, resources are wasted, and the like. The bottle comprises an inner bottle body, an outer bottle body connected with the inner bottle body in a sleeved mode, a base connected with the inner bottle body in a sleeved mode and a lower cover connected with the inner bottle body in a sleeved mode. An anti-overflow liquid nozzle is clamped at the top of the inner bottle; the top of the outer bottle is connected with an upper cover; the upper cover is propped against the anti-overflow liquid nozzle; the base is hermetically clamped with the inner wall of the bottom of the inner bottle; the outer wall of the middle of the base is detachably connected with the inner wall of the bottom of the outer bottle; an ejection piston capable of moving up and down is arranged in the inner bottle; the material ejecting piston is slidably and hermetically abutted against the inner wall of the inner bottle; an upper opening type elastic air bag is clamped to the center of the top of the base in a sealed mode. Air inlets are formed in the bottoms of the elastic airbags.

Description

Technical Field

[0001] The invention relates to the technical field of filling tubes, and in particular to an environmentally friendly replaceable and leak-proof filling tube. Background Art

[0002] The filling tube is a container for containing and packaging liquid cosmetics and skin care materials. The existing filling tube has a simple structure and generally adopts a side pouring method to discharge liquid, which is not easy to control the amount of liquid discharged. In addition, the shell uses a colloid to fix and bond the inner and outer bottles. After use, the inner and outer bottles cannot be recycled due to the fixed connection of the colloid, which is not environmentally friendly, wastes resources, and increases production costs. At the same time, when the lid of the existing filling tube is opened for use, if the product accidentally falls or stands upside down, the liquid in the tube will continue to flow out, which not only wastes materials, but also easily causes pollution and is inconvenient to use. Summary of the invention

[0003] The object of the present invention is to provide an environmentally friendly replaceable leak-proof liquid filling tube to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An environmentally friendly, replaceable, leak-proof filling tube comprises an inner bottle for filling material, an outer bottle detachably limitedly sleeved on the outer side of the inner bottle, a base detachably sleeved under the outer bottle, and a lower cover detachably sleeved on the outer side of the bottom of the base; an anti-overflow liquid nozzle is sealed and clamped at the top center of the inner bottle; an upper cover is detachably connected to the top of the outer bottle; the top inner wall of the upper cover abuts against the anti-overflow liquid nozzle; the top outer wall of the base is sealed and clamped with the bottom inner wall of the inner bottle, and the middle outer wall of the base is detachably connected to the bottom inner wall of the outer bottle; a material-pushing piston is built in the inner bottle and can be slidably sealed and abutted against the inner wall of the inner bottle; an upper-opening elastic airbag is sealed and clamped at the top center of the base; an air inlet is provided at the bottom of the elastic airbag.

[0006] Preferably, a first connecting internal thread is provided on the inner side wall of the upper cover; correspondingly, a first connecting external thread matching the first connecting internal thread is provided on the top outer wall of the outer bottle; the first connecting internal thread and the first connecting external thread are detachably threadedly connected, and both are portable and reliable for assembly and disassembly.

[0007] Preferably, the base includes a second clamping protrusion arranged at the top and a second connecting external thread arranged below the second clamping protrusion. Correspondingly, the inner wall of the bottom of the inner bottle is provided with a second clamping groove matching the second clamping protrusion, and the inner wall of the bottom of the outer bottle is provided with a second connecting internal thread matching the second connecting external thread; the second clamping protrusion and the second clamping groove are sealedly clamped; the second connecting internal thread and the second connecting external thread are threadedly connected. The base is stably clamped with the inner bottle; the base is reliably connected with the outer bottle.

[0008] Preferably, a first sealing ring is provided on the contact surface between the second clamping protrusion and the second clamping groove, so as to achieve a good sealing effect.

[0009] Preferably, the top inner wall of the upper cover is provided with a circular convex ring; the anti-overflow liquid nozzle includes an upper convex arc top surface, a cross liquid outlet arranged at the center of the upper convex arc top surface and a first clamping groove arranged at the bottom; when the upper cover is connected to the outer bottle, the circular convex ring is in close contact with the inner side of the circumferential edge of the upper convex arc top surface, and the cross liquid outlet is completely covered by the circular convex ring; the top of the inner bottle is provided with a first clamping convex ring matching the first clamping groove; the first clamping groove and the first clamping convex ring are in sealing contact; the inner wall of the outer bottle near the top is provided with a first limiting step, and correspondingly, the outer wall of the inner bottle near the top is provided with a second limiting step matching the first limiting step, and the first limiting step and the second limiting step are in limiting contact. When the bottle body is accidentally inverted or lying down, the liquid in the inner bottle will not flow out from the cross liquid outlet.

[0010] Preferably, the elastic airbag includes a ring-shaped third clamping groove arranged at the top; correspondingly, a ring-shaped third clamping protrusion matching the third clamping groove is provided at the top center of the base; the third clamping groove and the third clamping protrusion are clamped and connected; the contact surfaces of the third clamping groove and the third clamping protrusion are provided with a second double-layer sealing ring in an upper and lower layer to achieve a stable sealed clamping connection between the elastic airbag and the base.

[0011] Preferably, the ejecting piston comprises an inverted U-shaped shell, an annular sealing strip arranged on the outer side of the shell, and a connecting bridge connecting the shell and the annular sealing strip; the cross section of the annular sealing strip is in a concave arc shape; the outer side of the annular sealing strip is in slidable sealing contact with the inner wall of the inner bottle; the top shape of the shell matches the top inner wall of the inner bottle. The annular sealing strip 2 with a concave arc cross section makes the ejecting piston contact with the inner wall of the inner bottle to form a good sealing effect.

[0012] Preferably, a detachable opening cover is provided between the elastic airbag and the lower cover; the opening cover comprises an annular cover body, a handle arranged at the bottom of the annular cover body, and a connecting rod arranged at the center of the annular cover body on the side away from the handle; a third connecting external thread is provided at the top of the connecting rod; a cross connecting frame is provided at the bottom of the inverted U-shaped shell; a third connecting internal thread matching the third connecting external thread is provided at the center of the cross connecting frame, and the third connecting internal thread and the third connecting external thread are threadedly connected; a third limiting step is provided on the bottom inner wall of the base for limiting abutment with the annular cover body, and the annular cover body and the third limiting step are limitedly abutted. The opening cover is pre-threadedly connected with the piston. When the product is unsealed and used for the first time, the opening cover needs to be screwed out so that the ejecting piston is released from the limit sliding upward. The design of the opening cover can ensure the reliable quality of the product before it is sold and used.

[0013] Preferably, the bottom surface of the inverted U-shaped shell is provided with a rotation limiting protrusion, and correspondingly, the top surface of the base is provided with a rotation limiting groove matching the rotation limiting protrusion; the rotation limiting protrusion and the rotation limiting groove are in limiting contact with each other, which is convenient for disassembly and assembly of the opening cover.

[0014] Compared with the prior art, the environmentally friendly replaceable anti-leakage liquid filling tube of the present application has the following beneficial effects:

[0015] Compared with the structure of the traditional inverted bottle body that discharges materials immediately, the present invention is provided with an elastic airbag at the bottom. When an external force presses the airbag, the material-pushing piston slides upward under the drive of air pressure, and then pushes the material body above, so that the material body is extruded from the anti-overflow liquid nozzle, and the anti-overflow liquid nozzle is provided with a cross liquid outlet. When the bottle body is inverted, if the elastic airbag is not pressed, the weight of the material in the closed inner bottle is less than the atmospheric pressure outside the cross liquid outlet, and due to the surface tension of the liquid, the cross liquid outlet is covered with a thin layer of liquid film, which blocks the liquid at the cross liquid outlet, so that the bottle body will not overflow when it is inverted. When an external force presses the elastic airbag, the liquid film at the cross liquid outlet ruptures under the action of the increased internal pressure, and the liquid can flow out from the cross liquid outlet. At the same time, an air inlet hole is provided at the bottom of the elastic airbag. When pressing the airbag, the air inlet hole needs to be sealed with a finger at the same time to increase the air pressure between the elastic airbag and the ejecting piston, thereby driving the ejecting piston to slide upward. This structure can avoid the waste of material overflow caused by partial mispressure, and the upper cover is provided with a circular convex ring for sealing the cross liquid outlet. Without opening the upper cover, the material is not easy to flow out of the cross liquid outlet, further effectively preventing accidental waste of the material. In addition, the opening cover is pre-threaded with the piston. When the product is opened and used for the first time, the opening cover needs to be unscrewed so that the ejecting piston is released from the upward limit sliding. The design of the opening cover can ensure the quality of the product before it is sold and used. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 It is an exploded diagram of the structure of an embodiment of the present invention;

[0018] Figure 3 It is a structural explosion diagram of another perspective of an embodiment of the present invention;

[0019] Figure 4 It is a cross-sectional view of the connection structure of the embodiment of the present invention in working state;

[0020] Figure 5 A cross-sectional view of the connection structure in another working state of an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of the structure of an elastic airbag in an embodiment of the present invention;

[0022] Figure 7 A schematic structural diagram of an elastic airbag from another perspective in an embodiment of the present invention;

[0023] Figure 8 It is a structural cross-sectional view of an elastic airbag in an embodiment of the present invention;

[0024] Fig. 9 It is a structural schematic diagram of a base in an embodiment of the present invention;

[0025] Fig.10 is a schematic structural diagram of the base from another perspective in an embodiment of the present invention;

[0026] Fig.11 It is a structural cross-sectional view of a base in an embodiment of the present invention;

[0027] Fig.12 This is a schematic diagram of the structure of the ejector piston in an embodiment of the present invention;

[0028] Fig.13 It is a structural schematic diagram of the ejecting piston from another perspective in an embodiment of the present invention;

[0029] Fig.14 It is a structural cross-sectional view of the ejecting piston in an embodiment of the present invention;

[0030] Fig.15 This is a schematic diagram of the structure of the inner bottle in an embodiment of the present invention;

[0031] Fig.16 This is a structural cross-sectional view of an inner bottle in an embodiment of the present invention;

[0032] Fig.17 This is a schematic diagram of the structure of the outer bottle in an embodiment of the present invention;

[0033] Fig.18 This is a cross-sectional view of the outer bottle structure in an embodiment of the present invention;

[0034] Fig.19 Schematic diagram of the structure of the anti-overflow liquid nozzle in an embodiment of the present invention;

[0035] Fig. 20 It is a cross-sectional view of the anti-overflow liquid nozzle structure in an embodiment of the present invention;

[0036] Fig.21 This is a schematic diagram of the structure of the upper cover in an embodiment of the present invention;

[0037] Fig. 22 It is a cross-sectional view of the upper cover structure in an embodiment of the present invention;

[0038] Fig.23 An exploded view of the connection structure of the opening cover in the embodiment of the present invention;

[0039] Fig.24 A cross-sectional view of the connection structure of the opening cover in an embodiment of the present invention;

[0040] Fig.25 This is a schematic diagram of the structure of the lower cover in an embodiment of the present invention;

[0041] Fig.26 It is a structural schematic diagram of the opening cover in an embodiment of the present invention;

[0042] Fig. 27 Schematic diagram of the structure of the ejecting piston in an embodiment of the present invention.

[0043] Figure numerals: 1, inner bottle; 11, second clamping groove; 12, second limiting step; 13, first clamping convex ring; 2, outer bottle; 21, first connecting external thread; 22, second connecting internal thread; 23, first limiting step; 3, base; 31, second clamping protrusion; 32, second connecting external thread; 33, first sealing ring; 34, third clamping protrusion; 35, third limiting step; 4, lower cover; 41, clamping ridge; 5, anti-overflow liquid nozzle; 51, upward convex arc top surface; 52, cross-shaped protrusion Liquid port; 53, first snap-fit ​​groove; 6, upper cover; 61, first connecting internal thread; 62, circular convex ring; 7, ejector piston; 71, inverted U-shaped shell; 72, annular sealing strip; 73, connecting bridge; 74, cross connecting frame; 75, third connecting internal thread; 76, rotation limiting protrusion; 8, elastic airbag; 81, air inlet hole; 82, third snap-fit ​​groove; 83, second sealing ring; 9, opening cover; 91, annular cover body; 92, handle; 93, connecting rod; 94, third connecting external thread. DETAILED DESCRIPTION

[0044] The following is further described in detail through specific implementation methods:

[0045] Example 1

[0046] like Figure 1-27 As shown, this embodiment shows an environmentally friendly replaceable anti-leakage liquid filling tube, including an inner bottle 1 for filling material, an outer bottle 2 detachably limitedly sleeved on the outer side of the inner bottle 1, a base 3 detachably sleeved below the outer bottle 2, and a lower cover 4 detachably sleeved on the outer side of the bottom of the base 3. An anti-overflow liquid nozzle 5 is sealed and clamped at the center of the top of the inner bottle 1; an upper cover 6 is detachably connected to the top of the outer bottle 2; the top inner wall of the upper cover 6 abuts against the anti-overflow liquid nozzle 5. The top outer wall of the base 3 is sealed and clamped with the bottom inner wall of the inner bottle 1, and the middle outer wall of the base 3 is detachably connected to the bottom inner wall of the outer bottle 2.

[0047] The inner bottle 1 has a built-in push-up piston 7 that can move up and down; the push-up piston 7 is in slidable sealing contact with the inner wall of the inner bottle 1; the top center of the base 3 is sealed with an upper opening elastic airbag 8; the bottom of the elastic airbag 8 is provided with an air inlet 81; the size of the air inlet 81 is selected to be covered by the fingertips of a normal adult; the diameter of the air inlet 81 in this embodiment is 0.3cm-0.5cm. Specifically, during use, the outer bottle 2, base 3, lower cover 4 and airbag and other components do not need to contact the material body, and all adopt a detachable connection method, which can be recycled and reused after the product is used, which is environmentally friendly and saves production costs.

[0048] When specifically connected, the airbag is detachably clamped in the base 3, and the connection between the two is sealed; the bottom inner wall of the inner bottle 1 is detachably clamped with the base 3, and the connection between the two is sealed; the bottom inner wall of the outer bottle 2 is detachably connected to the base 3; the top outer wall of the outer bottle 2 is detachably connected to the upper cover 6; the top piston 7 is slidably abutted on the inner wall of the inner bottle 1, and the connection between the two is sealed; the lower cover 4 is detachably connected to the base 3 through the clamping ridge 41; the anti-overflow liquid nozzle 5 is clamped at the center of the top surface of the inner bottle 1, and is sealed against the inner wall of the upper cover 6; when actually working, first remove the upper cover 6 and the lower cover 4, and then press the bottom of the elastic airbag 8 with your fingers and seal the air inlet hole 81, so as to increase the air pressure between the elastic airbag 8 and the top piston 7, thereby driving the top piston 7 to slide upward, and the material above the top piston 7 flows out from the anti-overflow liquid nozzle 5 as the top piston 7 moves upward.

[0049] In this embodiment, the product upper cover 6 and the lower cover 4 can be made of PET, PETG, PP and other materials, the outer bottle 2 can be made of PET, PETG, PCTG and other materials, the inner bottle 1 can be made of PP, PETG, PET and other materials, the anti-overflow liquid nozzle 5 is made of silicone material, the top piston 7 can be made of PP, PE combined with silicone and other materials, and the elastic airbag 8 is made of silicone material.

[0050] Example 2

[0051] like Figure 1-27As shown, another embodiment shows an environmentally friendly replaceable leak-proof liquid filling tube, further illustrating that in a further embodiment of this embodiment, as Figure 1-5 , Figure 17-18 and Figure 21-22 As shown, a first connecting internal thread 61 is provided on the inner wall of the upper cover 6; correspondingly, a first connecting external thread 21 matching the first connecting internal thread 61 is provided on the top outer wall of the outer bottle 2; the first connecting internal thread 61 and the first connecting external thread 21 are detachably threadedly connected, and the two are portable, reliable and stable to disassemble and assemble during use.

[0052] Example 3

[0053] like Figure 1-27 As shown, another embodiment shows an environmentally friendly replaceable leak-proof liquid filling tube, further illustrating that in a further embodiment of this embodiment, as Figure 1-5 , Figure 9-11 and Figure 15-18 As shown, the base 3 includes a second clamping protrusion 31 arranged at the top and a second connecting external thread 32 arranged below the second clamping protrusion 31. Correspondingly, the inner wall of the bottom of the inner bottle 1 is provided with a second clamping groove 11 matching the second clamping protrusion 31, and the inner wall of the bottom of the outer bottle 2 is provided with a second connecting internal thread 22 matching the second connecting external thread 32; the second clamping protrusion 31 and the second clamping groove 11 are sealed and clamped together, and the base 3 and the inner bottle 1 are stably clamped together; the second connecting internal thread 22 and the second connecting external thread 32 are threadedly connected, and the base 3 and the outer bottle 2 are reliably connected.

[0054] Furthermore, in these embodiments, a first sealing ring 33 is provided on the contact surface between the second clamping protrusion 31 and the second clamping groove 11 to improve the sealing effect of the connection between the base 3 and the inner bottle 1 .

[0055] Example 4

[0056] like Figure 1-27 As shown, another embodiment shows an environmentally friendly replaceable leak-proof liquid filling tube, further illustrating that in a further embodiment of this embodiment, as Figure 1-5 and Figure 15-22 As shown, the top inner wall of the upper cover 6 is provided with a circular convex ring 62; the anti-overflow liquid nozzle 5 includes an upward convex arc top surface 51, a cross liquid outlet 52 arranged at the center of the upper convex arc top surface 51 and a first clamping groove 53 arranged at the bottom.

[0057] When the upper cover 6 is connected to the outer bottle 2, the circular convex ring 62 is in close contact with the inner side of the circumferential edge of the upper convex arc-shaped top surface 51, and the cross liquid outlet 52 is completely covered by the circular convex ring 62. The circular convex ring 62 is used to seal the cross liquid outlet 52. When the upper cover 6 is in a state of being connected to the outer bottle 2, the material in the inner bottle 1 is prevented from overflowing.

[0058] The top of the inner bottle 1 is provided with a first snap ring 13 matching the first snap groove 53 ; the first snap groove 53 and the first snap ring 13 are sealedly abutted against each other to achieve a sealed and stable connection between the anti-overflow liquid nozzle 5 and the inner bottle 1 .

[0059] The inner wall of the outer bottle 2 near the top is provided with a first limiting step 23, and correspondingly, the outer wall of the inner bottle 1 near the top is provided with a second limiting step 12 matching the first limiting step 23, and the first limiting step 23 and the second limiting step 12 are limitedly abutted to realize the limited sleeve connection between the inner bottle 1 and the outer bottle 2.

[0060] Specifically, when the bottle body is inverted, if the elastic airbag 8 is not pressed, the weight of the material in the sealed inner bottle 1 is less than the atmospheric pressure outside the cross liquid outlet 52, and due to the surface tension of the liquid, the cross liquid outlet 52 is covered with a thin layer of liquid film, which blocks the liquid at the cross liquid outlet 52, so that the bottle body will not overflow when it is inverted. When an external force presses the elastic airbag 8, the liquid film at the cross liquid outlet 52 ruptures under the action of the increased internal pressure, and the liquid can flow out from the cross liquid outlet 52.

[0061] Example 5

[0062] like Figure 1-27 As shown, another embodiment shows an environmentally friendly replaceable leak-proof liquid filling tube, further illustrating that in a further embodiment of this embodiment, as Figure 1-11 As shown, the elastic airbag 8 includes a ring-shaped third clamping groove 82 arranged at the top; correspondingly, a ring-shaped third clamping protrusion 34 matching the third clamping groove 82 is provided at the top center of the base 3; the third clamping groove 82 and the third clamping protrusion 34 are clamped and connected; the contact surfaces of the third clamping groove 82 and the third clamping protrusion 34 are provided with an upper and lower double-layer second sealing ring 83 to achieve a stable sealed clamping connection between the elastic airbag 8 and the base 3.

[0063] Example 6

[0064] like Figure 1-27 As shown, another embodiment shows an environmentally friendly replaceable leak-proof liquid filling tube, further illustrating that in a further embodiment of this embodiment, as Figure 1-5 and Figure 12-14As shown, the ejecting piston 7 comprises an inverted U-shaped shell 71, an annular sealing strip 72 arranged on the outer side of the shell, and a connecting bridge 73 connecting the shell and the annular sealing strip 72; the cross section of the annular sealing strip 72 is in an inwardly concave arc shape; the outer side of the annular sealing strip 72 is in slidable sealing contact with the inner wall of the inner bottle 1; the top shape of the shell matches the top inner wall of the inner bottle 1. Specifically, the annular sealing strip 72 with an inwardly concave arc cross section makes the ejecting piston 7 contact with the inner wall of the inner bottle 1 to form a good sealing effect, and the inverted U-shaped shell 71 has an air cavity. When the elastic airbag 8 squeezes air into the air cavity, the air pressure in the air cavity increases, thereby driving the ejecting piston 7 to slide upward.

[0065] Further description, in these embodiments, Figure 1-5 and Figure 23-27 As shown, a detachable opening cover 9 is provided between the elastic airbag 8 and the lower cover 4; the opening cover 9 includes an annular cover body 91, a handle 92 arranged at the bottom of the annular cover body 91 and a connecting rod 93 arranged at the center of the annular cover body 91 and away from the handle 92; a third connecting external thread 94 is provided at the top of the connecting rod 93; a cross connecting frame 74 is provided at the bottom of the inverted U-shaped shell 71; a third connecting internal thread 75 matching the third connecting external thread 94 is provided at the center of the cross connecting frame 74, and the third connecting internal thread 75 and the third connecting external thread 94 are threadedly connected; a third limiting step 35 is provided on the inner wall of the bottom of the base 3 for limiting abutment with the annular cover body 91, and the annular cover body 91 and the third limiting step 35 are limitedly abutted. After the material is injected into the inner bottle 1, the ejecting piston 7 moves to abut against the top surface of the base 3. At this time, the opening cover 9 is installed into the bottom of the base 3, and the connecting rod 93 of the opening cover 9 passes through the air inlet hole 81 and is threadedly connected with the cross connecting frame 74 of the ejecting piston 7, forming a reliable limiting connection and effectively preventing the elastic airbag 8 from being accidentally touched before the product is opened.

[0066] Furthermore, in these embodiments, the bottom surface of the inverted U-shaped shell 71 is provided with a rotation limiting protrusion 76, and correspondingly, the top surface of the base 3 is provided with a rotation limiting groove matching the rotation limiting protrusion 76; the rotation limiting protrusion 76 and the rotation limiting groove are both limitedly abutted to facilitate the disassembly and assembly of the opening cover 9.

[0067] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An environmentally friendly replaceable leak-proof liquid filling tube, characterized in that: It includes an inner bottle for filling material, an outer bottle detachably sleeved on the outer side of the inner bottle, a base detachably sleeved under the outer bottle, and a lower cover detachably sleeved on the outer side of the bottom of the base; The center of the top of the inner bottle is sealed and clamped with an anti-overflow liquid nozzle; the top of the outer bottle is detachably connected with an upper cover; the top inner wall of the upper cover abuts against the anti-overflow liquid nozzle; The top outer wall of the base is sealed and clamped with the bottom inner wall of the inner bottle, and the middle outer wall of the base is detachably connected with the bottom inner wall of the outer bottle; The inner bottle is provided with a material-lifting piston which can move up and down; the material-lifting piston is in slidable sealing contact with the inner wall of the inner bottle; an upper-opening elastic airbag is sealed and clamped at the top center of the base; an air inlet hole is provided at the bottom of the elastic airbag.

2. The environmentally friendly replaceable anti-leakage liquid filling tube according to claim 1, characterized in that: The inner side wall of the upper cover is provided with a first connecting internal thread; correspondingly, the top outer wall of the outer bottle is provided with a first connecting external thread matching the first connecting internal thread; the first connecting internal thread and the first connecting external thread are detachably threadedly connected.

3. The environmentally friendly replaceable anti-leakage liquid filling tube according to claim 1, characterized in that: The base includes a second clamping protrusion arranged on the top and a second connecting external thread arranged below the second clamping protrusion. Correspondingly, the inner wall of the bottom of the inner bottle is provided with a second clamping groove matching the second clamping protrusion, and the inner wall of the bottom of the outer bottle is provided with a second connecting internal thread matching the second connecting external thread; the second clamping protrusion and the second clamping groove are sealingly clamped; the second connecting internal thread and the second connecting external thread are threadedly connected.

4. The environmentally friendly replaceable anti-leakage liquid filling tube according to claim 3, characterized in that: A first sealing ring is disposed on the contact surfaces of the second clamping protrusion and the second clamping groove.

5. The environmentally friendly replaceable anti-leakage liquid filling tube according to claim 1, characterized in that: The top inner wall of the upper cover is provided with a circular convex ring; The anti-overflow liquid nozzle comprises an upward convex arc-shaped top surface, a cross liquid outlet arranged at the center of the upward convex arc-shaped top surface, and a first clamping groove arranged at the bottom; When the upper cover is connected to the outer bottle, the circular convex ring is in close contact with the inner side of the circumferential edge of the upper convex arc-shaped top surface, and the cross liquid outlet is completely covered by the circular convex ring; The top of the inner bottle is provided with a first clamping convex ring matching the first clamping groove; the first clamping groove and the first clamping convex ring are in sealing contact with each other; The inner wall of the outer bottle near the top is provided with a first limiting step, and correspondingly, the outer wall of the inner bottle near the top is provided with a second limiting step matching the first limiting step, and the first limiting step and the second limiting step are both limitedly abutted.

6. The environmentally friendly replaceable anti-leakage liquid filling tube according to claim 1, characterized in that: The elastic airbag includes a ring-shaped third clamping groove arranged at the top; correspondingly, a ring-shaped third clamping protrusion matching the third clamping groove is provided at the top center of the base; the third clamping groove and the third clamping protrusion are clamped and connected; the contact surfaces of the third clamping groove and the third clamping protrusion are provided with a second double-layer sealing ring.

7. The environmentally friendly replaceable leak-proof liquid filling tube according to claim 1, characterized in that: The ejecting piston comprises an inverted U-shaped shell, an annular sealing strip arranged on the outside of the shell and a connecting bridge connecting the shell and the annular sealing strip; the cross-section of the annular sealing strip is an inwardly concave arc shape; the outer side of the annular sealing strip is in slidable sealing contact with the inner wall of the inner bottle; the top shape of the shell matches the top inner wall of the inner bottle.

8. The environmentally friendly replaceable anti-leakage liquid filling tube according to claim 7, characterized in that: A detachable opening cover is provided between the elastic airbag and the lower cover; the opening cover comprises an annular cover body, a handle arranged at the bottom of the annular cover body, and a connecting rod arranged at the center of the annular cover body and away from the handle; a third connecting external thread is provided at the top of the connecting rod; A cross connecting frame is provided at the bottom of the inverted U-shaped housing; a third connecting internal thread matching the third connecting external thread is provided at the center of the cross connecting frame, and the third connecting internal thread and the third connecting external thread are threadedly connected; The bottom inner wall of the base is provided with a third limiting step which is in limiting contact with the annular cover body, and the annular cover body and the third limiting step are both in limiting contact with each other.

9. The environmentally friendly replaceable anti-leakage liquid filling tube according to claim 8, characterized in that: The bottom surface of the inverted U-shaped shell is provided with a rotation limiting protrusion, and correspondingly, the top surface of the base is provided with a rotation limiting groove matching the rotation limiting protrusion; the rotation limiting protrusion and the rotation limiting groove are both in limiting contact.

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